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Input: wacom - fix touch parsing on newer Bamboos
[linux-btrfs-devel.git] / drivers / net / igb / igb_main.c
blob2c28621eb30b5aa02e0e7fe6d214f5e4c0b60f72
1 /*******************************************************************************
2
3 Intel(R) Gigabit Ethernet Linux driver
4 Copyright(c) 2007-2009 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26 *******************************************************************************/
27
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/init.h>
31 #include <linux/vmalloc.h>
32 #include <linux/pagemap.h>
33 #include <linux/netdevice.h>
34 #include <linux/ipv6.h>
35 #include <linux/slab.h>
36 #include <net/checksum.h>
37 #include <net/ip6_checksum.h>
38 #include <linux/net_tstamp.h>
39 #include <linux/mii.h>
40 #include <linux/ethtool.h>
41 #include <linux/if_vlan.h>
42 #include <linux/pci.h>
43 #include <linux/pci-aspm.h>
44 #include <linux/delay.h>
45 #include <linux/interrupt.h>
46 #include <linux/if_ether.h>
47 #include <linux/aer.h>
48 #include <linux/prefetch.h>
49 #ifdef CONFIG_IGB_DCA
50 #include <linux/dca.h>
51 #endif
52 #include "igb.h"
53
54 #define MAJ 3
55 #define MIN 0
56 #define BUILD 6
57 #define KFIX 2
58 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \
59 __stringify(BUILD) "-k" __stringify(KFIX)
60 char igb_driver_name[] = "igb";
61 char igb_driver_version[] = DRV_VERSION;
62 static const char igb_driver_string[] =
63 "Intel(R) Gigabit Ethernet Network Driver";
64 static const char igb_copyright[] = "Copyright (c) 2007-2011 Intel Corporation.";
65
66 static const struct e1000_info *igb_info_tbl[] = {
67 [board_82575] = &e1000_82575_info,
68 };
69
70 static DEFINE_PCI_DEVICE_TABLE(igb_pci_tbl) = {
71 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_COPPER), board_82575 },
72 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_FIBER), board_82575 },
73 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_SERDES), board_82575 },
74 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_SGMII), board_82575 },
75 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_COPPER), board_82575 },
76 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_FIBER), board_82575 },
77 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_QUAD_FIBER), board_82575 },
78 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_SERDES), board_82575 },
79 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_SGMII), board_82575 },
80 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_COPPER_DUAL), board_82575 },
81 { PCI_VDEVICE(INTEL, E1000_DEV_ID_DH89XXCC_SGMII), board_82575 },
82 { PCI_VDEVICE(INTEL, E1000_DEV_ID_DH89XXCC_SERDES), board_82575 },
83 { PCI_VDEVICE(INTEL, E1000_DEV_ID_DH89XXCC_BACKPLANE), board_82575 },
84 { PCI_VDEVICE(INTEL, E1000_DEV_ID_DH89XXCC_SFP), board_82575 },
85 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576), board_82575 },
86 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_NS), board_82575 },
87 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_NS_SERDES), board_82575 },
88 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_FIBER), board_82575 },
89 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_SERDES), board_82575 },
90 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_SERDES_QUAD), board_82575 },
91 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_QUAD_COPPER_ET2), board_82575 },
92 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_QUAD_COPPER), board_82575 },
93 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575EB_COPPER), board_82575 },
94 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575EB_FIBER_SERDES), board_82575 },
95 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82575GB_QUAD_COPPER), board_82575 },
96 /* required last entry */
97 {0, }
98 };
99
100 MODULE_DEVICE_TABLE(pci, igb_pci_tbl);
101
102 void igb_reset(struct igb_adapter *);
103 static int igb_setup_all_tx_resources(struct igb_adapter *);
104 static int igb_setup_all_rx_resources(struct igb_adapter *);
105 static void igb_free_all_tx_resources(struct igb_adapter *);
106 static void igb_free_all_rx_resources(struct igb_adapter *);
107 static void igb_setup_mrqc(struct igb_adapter *);
108 static int igb_probe(struct pci_dev *, const struct pci_device_id *);
109 static void __devexit igb_remove(struct pci_dev *pdev);
110 static void igb_init_hw_timer(struct igb_adapter *adapter);
111 static int igb_sw_init(struct igb_adapter *);
112 static int igb_open(struct net_device *);
113 static int igb_close(struct net_device *);
114 static void igb_configure_tx(struct igb_adapter *);
115 static void igb_configure_rx(struct igb_adapter *);
116 static void igb_clean_all_tx_rings(struct igb_adapter *);
117 static void igb_clean_all_rx_rings(struct igb_adapter *);
118 static void igb_clean_tx_ring(struct igb_ring *);
119 static void igb_clean_rx_ring(struct igb_ring *);
120 static void igb_set_rx_mode(struct net_device *);
121 static void igb_update_phy_info(unsigned long);
122 static void igb_watchdog(unsigned long);
123 static void igb_watchdog_task(struct work_struct *);
124 static netdev_tx_t igb_xmit_frame_adv(struct sk_buff *skb, struct net_device *);
125 static struct rtnl_link_stats64 *igb_get_stats64(struct net_device *dev,
126 struct rtnl_link_stats64 *stats);
127 static int igb_change_mtu(struct net_device *, int);
128 static int igb_set_mac(struct net_device *, void *);
129 static void igb_set_uta(struct igb_adapter *adapter);
130 static irqreturn_t igb_intr(int irq, void *);
131 static irqreturn_t igb_intr_msi(int irq, void *);
132 static irqreturn_t igb_msix_other(int irq, void *);
133 static irqreturn_t igb_msix_ring(int irq, void *);
134 #ifdef CONFIG_IGB_DCA
135 static void igb_update_dca(struct igb_q_vector *);
136 static void igb_setup_dca(struct igb_adapter *);
137 #endif /* CONFIG_IGB_DCA */
138 static bool igb_clean_tx_irq(struct igb_q_vector *);
139 static int igb_poll(struct napi_struct *, int);
140 static bool igb_clean_rx_irq_adv(struct igb_q_vector *, int *, int);
141 static int igb_ioctl(struct net_device *, struct ifreq *, int cmd);
142 static void igb_tx_timeout(struct net_device *);
143 static void igb_reset_task(struct work_struct *);
144 static void igb_vlan_rx_register(struct net_device *, struct vlan_group *);
145 static void igb_vlan_rx_add_vid(struct net_device *, u16);
146 static void igb_vlan_rx_kill_vid(struct net_device *, u16);
147 static void igb_restore_vlan(struct igb_adapter *);
148 static void igb_rar_set_qsel(struct igb_adapter *, u8 *, u32 , u8);
149 static void igb_ping_all_vfs(struct igb_adapter *);
150 static void igb_msg_task(struct igb_adapter *);
151 static void igb_vmm_control(struct igb_adapter *);
152 static int igb_set_vf_mac(struct igb_adapter *, int, unsigned char *);
153 static void igb_restore_vf_multicasts(struct igb_adapter *adapter);
154 static int igb_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac);
155 static int igb_ndo_set_vf_vlan(struct net_device *netdev,
156 int vf, u16 vlan, u8 qos);
157 static int igb_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate);
158 static int igb_ndo_get_vf_config(struct net_device *netdev, int vf,
159 struct ifla_vf_info *ivi);
160 static void igb_check_vf_rate_limit(struct igb_adapter *);
161
162 #ifdef CONFIG_PM
163 static int igb_suspend(struct pci_dev *, pm_message_t);
164 static int igb_resume(struct pci_dev *);
165 #endif
166 static void igb_shutdown(struct pci_dev *);
167 #ifdef CONFIG_IGB_DCA
168 static int igb_notify_dca(struct notifier_block *, unsigned long, void *);
169 static struct notifier_block dca_notifier = {
170 .notifier_call = igb_notify_dca,
171 .next = NULL,
172 .priority = 0
173 };
174 #endif
175 #ifdef CONFIG_NET_POLL_CONTROLLER
176 /* for netdump / net console */
177 static void igb_netpoll(struct net_device *);
178 #endif
179 #ifdef CONFIG_PCI_IOV
180 static unsigned int max_vfs = 0;
181 module_param(max_vfs, uint, 0);
182 MODULE_PARM_DESC(max_vfs, "Maximum number of virtual functions to allocate "
183 "per physical function");
184 #endif /* CONFIG_PCI_IOV */
185
186 static pci_ers_result_t igb_io_error_detected(struct pci_dev *,
187 pci_channel_state_t);
188 static pci_ers_result_t igb_io_slot_reset(struct pci_dev *);
189 static void igb_io_resume(struct pci_dev *);
190
191 static struct pci_error_handlers igb_err_handler = {
192 .error_detected = igb_io_error_detected,
193 .slot_reset = igb_io_slot_reset,
194 .resume = igb_io_resume,
195 };
196
197
198 static struct pci_driver igb_driver = {
199 .name = igb_driver_name,
200 .id_table = igb_pci_tbl,
201 .probe = igb_probe,
202 .remove = __devexit_p(igb_remove),
203 #ifdef CONFIG_PM
204 /* Power Management Hooks */
205 .suspend = igb_suspend,
206 .resume = igb_resume,
207 #endif
208 .shutdown = igb_shutdown,
209 .err_handler = &igb_err_handler
210 };
211
212 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
213 MODULE_DESCRIPTION("Intel(R) Gigabit Ethernet Network Driver");
214 MODULE_LICENSE("GPL");
215 MODULE_VERSION(DRV_VERSION);
216
217 struct igb_reg_info {
218 u32 ofs;
219 char *name;
220 };
221
222 static const struct igb_reg_info igb_reg_info_tbl[] = {
223
224 /* General Registers */
225 {E1000_CTRL, "CTRL"},
226 {E1000_STATUS, "STATUS"},
227 {E1000_CTRL_EXT, "CTRL_EXT"},
228
229 /* Interrupt Registers */
230 {E1000_ICR, "ICR"},
231
232 /* RX Registers */
233 {E1000_RCTL, "RCTL"},
234 {E1000_RDLEN(0), "RDLEN"},
235 {E1000_RDH(0), "RDH"},
236 {E1000_RDT(0), "RDT"},
237 {E1000_RXDCTL(0), "RXDCTL"},
238 {E1000_RDBAL(0), "RDBAL"},
239 {E1000_RDBAH(0), "RDBAH"},
240
241 /* TX Registers */
242 {E1000_TCTL, "TCTL"},
243 {E1000_TDBAL(0), "TDBAL"},
244 {E1000_TDBAH(0), "TDBAH"},
245 {E1000_TDLEN(0), "TDLEN"},
246 {E1000_TDH(0), "TDH"},
247 {E1000_TDT(0), "TDT"},
248 {E1000_TXDCTL(0), "TXDCTL"},
249 {E1000_TDFH, "TDFH"},
250 {E1000_TDFT, "TDFT"},
251 {E1000_TDFHS, "TDFHS"},
252 {E1000_TDFPC, "TDFPC"},
253
254 /* List Terminator */
255 {}
256 };
257
258 /*
259 * igb_regdump - register printout routine
260 */
261 static void igb_regdump(struct e1000_hw *hw, struct igb_reg_info *reginfo)
262 {
263 int n = 0;
264 char rname[16];
265 u32 regs[8];
266
267 switch (reginfo->ofs) {
268 case E1000_RDLEN(0):
269 for (n = 0; n < 4; n++)
270 regs[n] = rd32(E1000_RDLEN(n));
271 break;
272 case E1000_RDH(0):
273 for (n = 0; n < 4; n++)
274 regs[n] = rd32(E1000_RDH(n));
275 break;
276 case E1000_RDT(0):
277 for (n = 0; n < 4; n++)
278 regs[n] = rd32(E1000_RDT(n));
279 break;
280 case E1000_RXDCTL(0):
281 for (n = 0; n < 4; n++)
282 regs[n] = rd32(E1000_RXDCTL(n));
283 break;
284 case E1000_RDBAL(0):
285 for (n = 0; n < 4; n++)
286 regs[n] = rd32(E1000_RDBAL(n));
287 break;
288 case E1000_RDBAH(0):
289 for (n = 0; n < 4; n++)
290 regs[n] = rd32(E1000_RDBAH(n));
291 break;
292 case E1000_TDBAL(0):
293 for (n = 0; n < 4; n++)
294 regs[n] = rd32(E1000_RDBAL(n));
295 break;
296 case E1000_TDBAH(0):
297 for (n = 0; n < 4; n++)
298 regs[n] = rd32(E1000_TDBAH(n));
299 break;
300 case E1000_TDLEN(0):
301 for (n = 0; n < 4; n++)
302 regs[n] = rd32(E1000_TDLEN(n));
303 break;
304 case E1000_TDH(0):
305 for (n = 0; n < 4; n++)
306 regs[n] = rd32(E1000_TDH(n));
307 break;
308 case E1000_TDT(0):
309 for (n = 0; n < 4; n++)
310 regs[n] = rd32(E1000_TDT(n));
311 break;
312 case E1000_TXDCTL(0):
313 for (n = 0; n < 4; n++)
314 regs[n] = rd32(E1000_TXDCTL(n));
315 break;
316 default:
317 printk(KERN_INFO "%-15s %08x\n",
318 reginfo->name, rd32(reginfo->ofs));
319 return;
320 }
321
322 snprintf(rname, 16, "%s%s", reginfo->name, "[0-3]");
323 printk(KERN_INFO "%-15s ", rname);
324 for (n = 0; n < 4; n++)
325 printk(KERN_CONT "%08x ", regs[n]);
326 printk(KERN_CONT "\n");
327 }
328
329 /*
330 * igb_dump - Print registers, tx-rings and rx-rings
331 */
332 static void igb_dump(struct igb_adapter *adapter)
333 {
334 struct net_device *netdev = adapter->netdev;
335 struct e1000_hw *hw = &adapter->hw;
336 struct igb_reg_info *reginfo;
337 int n = 0;
338 struct igb_ring *tx_ring;
339 union e1000_adv_tx_desc *tx_desc;
340 struct my_u0 { u64 a; u64 b; } *u0;
341 struct igb_buffer *buffer_info;
342 struct igb_ring *rx_ring;
343 union e1000_adv_rx_desc *rx_desc;
344 u32 staterr;
345 int i = 0;
346
347 if (!netif_msg_hw(adapter))
348 return;
349
350 /* Print netdevice Info */
351 if (netdev) {
352 dev_info(&adapter->pdev->dev, "Net device Info\n");
353 printk(KERN_INFO "Device Name state "
354 "trans_start last_rx\n");
355 printk(KERN_INFO "%-15s %016lX %016lX %016lX\n",
356 netdev->name,
357 netdev->state,
358 netdev->trans_start,
359 netdev->last_rx);
360 }
361
362 /* Print Registers */
363 dev_info(&adapter->pdev->dev, "Register Dump\n");
364 printk(KERN_INFO " Register Name Value\n");
365 for (reginfo = (struct igb_reg_info *)igb_reg_info_tbl;
366 reginfo->name; reginfo++) {
367 igb_regdump(hw, reginfo);
368 }
369
370 /* Print TX Ring Summary */
371 if (!netdev || !netif_running(netdev))
372 goto exit;
373
374 dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
375 printk(KERN_INFO "Queue [NTU] [NTC] [bi(ntc)->dma ]"
376 " leng ntw timestamp\n");
377 for (n = 0; n < adapter->num_tx_queues; n++) {
378 tx_ring = adapter->tx_ring[n];
379 buffer_info = &tx_ring->buffer_info[tx_ring->next_to_clean];
380 printk(KERN_INFO " %5d %5X %5X %016llX %04X %3X %016llX\n",
381 n, tx_ring->next_to_use, tx_ring->next_to_clean,
382 (u64)buffer_info->dma,
383 buffer_info->length,
384 buffer_info->next_to_watch,
385 (u64)buffer_info->time_stamp);
386 }
387
388 /* Print TX Rings */
389 if (!netif_msg_tx_done(adapter))
390 goto rx_ring_summary;
391
392 dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
393
394 /* Transmit Descriptor Formats
395 *
396 * Advanced Transmit Descriptor
397 * +--------------------------------------------------------------+
398 * 0 | Buffer Address [63:0] |
399 * +--------------------------------------------------------------+
400 * 8 | PAYLEN | PORTS |CC|IDX | STA | DCMD |DTYP|MAC|RSV| DTALEN |
401 * +--------------------------------------------------------------+
402 * 63 46 45 40 39 38 36 35 32 31 24 15 0
403 */
404
405 for (n = 0; n < adapter->num_tx_queues; n++) {
406 tx_ring = adapter->tx_ring[n];
407 printk(KERN_INFO "------------------------------------\n");
408 printk(KERN_INFO "TX QUEUE INDEX = %d\n", tx_ring->queue_index);
409 printk(KERN_INFO "------------------------------------\n");
410 printk(KERN_INFO "T [desc] [address 63:0 ] "
411 "[PlPOCIStDDM Ln] [bi->dma ] "
412 "leng ntw timestamp bi->skb\n");
413
414 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
415 tx_desc = E1000_TX_DESC_ADV(*tx_ring, i);
416 buffer_info = &tx_ring->buffer_info[i];
417 u0 = (struct my_u0 *)tx_desc;
418 printk(KERN_INFO "T [0x%03X] %016llX %016llX %016llX"
419 " %04X %3X %016llX %p", i,
420 le64_to_cpu(u0->a),
421 le64_to_cpu(u0->b),
422 (u64)buffer_info->dma,
423 buffer_info->length,
424 buffer_info->next_to_watch,
425 (u64)buffer_info->time_stamp,
426 buffer_info->skb);
427 if (i == tx_ring->next_to_use &&
428 i == tx_ring->next_to_clean)
429 printk(KERN_CONT " NTC/U\n");
430 else if (i == tx_ring->next_to_use)
431 printk(KERN_CONT " NTU\n");
432 else if (i == tx_ring->next_to_clean)
433 printk(KERN_CONT " NTC\n");
434 else
435 printk(KERN_CONT "\n");
436
437 if (netif_msg_pktdata(adapter) && buffer_info->dma != 0)
438 print_hex_dump(KERN_INFO, "",
439 DUMP_PREFIX_ADDRESS,
440 16, 1, phys_to_virt(buffer_info->dma),
441 buffer_info->length, true);
442 }
443 }
444
445 /* Print RX Rings Summary */
446 rx_ring_summary:
447 dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
448 printk(KERN_INFO "Queue [NTU] [NTC]\n");
449 for (n = 0; n < adapter->num_rx_queues; n++) {
450 rx_ring = adapter->rx_ring[n];
451 printk(KERN_INFO " %5d %5X %5X\n", n,
452 rx_ring->next_to_use, rx_ring->next_to_clean);
453 }
454
455 /* Print RX Rings */
456 if (!netif_msg_rx_status(adapter))
457 goto exit;
458
459 dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
460
461 /* Advanced Receive Descriptor (Read) Format
462 * 63 1 0
463 * +-----------------------------------------------------+
464 * 0 | Packet Buffer Address [63:1] |A0/NSE|
465 * +----------------------------------------------+------+
466 * 8 | Header Buffer Address [63:1] | DD |
467 * +-----------------------------------------------------+
468 *
469 *
470 * Advanced Receive Descriptor (Write-Back) Format
471 *
472 * 63 48 47 32 31 30 21 20 17 16 4 3 0
473 * +------------------------------------------------------+
474 * 0 | Packet IP |SPH| HDR_LEN | RSV|Packet| RSS |
475 * | Checksum Ident | | | | Type | Type |
476 * +------------------------------------------------------+
477 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
478 * +------------------------------------------------------+
479 * 63 48 47 32 31 20 19 0
480 */
481
482 for (n = 0; n < adapter->num_rx_queues; n++) {
483 rx_ring = adapter->rx_ring[n];
484 printk(KERN_INFO "------------------------------------\n");
485 printk(KERN_INFO "RX QUEUE INDEX = %d\n", rx_ring->queue_index);
486 printk(KERN_INFO "------------------------------------\n");
487 printk(KERN_INFO "R [desc] [ PktBuf A0] "
488 "[ HeadBuf DD] [bi->dma ] [bi->skb] "
489 "<-- Adv Rx Read format\n");
490 printk(KERN_INFO "RWB[desc] [PcsmIpSHl PtRs] "
491 "[vl er S cks ln] ---------------- [bi->skb] "
492 "<-- Adv Rx Write-Back format\n");
493
494 for (i = 0; i < rx_ring->count; i++) {
495 buffer_info = &rx_ring->buffer_info[i];
496 rx_desc = E1000_RX_DESC_ADV(*rx_ring, i);
497 u0 = (struct my_u0 *)rx_desc;
498 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
499 if (staterr & E1000_RXD_STAT_DD) {
500 /* Descriptor Done */
501 printk(KERN_INFO "RWB[0x%03X] %016llX "
502 "%016llX ---------------- %p", i,
503 le64_to_cpu(u0->a),
504 le64_to_cpu(u0->b),
505 buffer_info->skb);
506 } else {
507 printk(KERN_INFO "R [0x%03X] %016llX "
508 "%016llX %016llX %p", i,
509 le64_to_cpu(u0->a),
510 le64_to_cpu(u0->b),
511 (u64)buffer_info->dma,
512 buffer_info->skb);
513
514 if (netif_msg_pktdata(adapter)) {
515 print_hex_dump(KERN_INFO, "",
516 DUMP_PREFIX_ADDRESS,
517 16, 1,
518 phys_to_virt(buffer_info->dma),
519 rx_ring->rx_buffer_len, true);
520 if (rx_ring->rx_buffer_len
521 < IGB_RXBUFFER_1024)
522 print_hex_dump(KERN_INFO, "",
523 DUMP_PREFIX_ADDRESS,
524 16, 1,
525 phys_to_virt(
526 buffer_info->page_dma +
527 buffer_info->page_offset),
528 PAGE_SIZE/2, true);
529 }
530 }
531
532 if (i == rx_ring->next_to_use)
533 printk(KERN_CONT " NTU\n");
534 else if (i == rx_ring->next_to_clean)
535 printk(KERN_CONT " NTC\n");
536 else
537 printk(KERN_CONT "\n");
538
539 }
540 }
541
542 exit:
543 return;
544 }
545
546
547 /**
548 * igb_read_clock - read raw cycle counter (to be used by time counter)
549 */
550 static cycle_t igb_read_clock(const struct cyclecounter *tc)
551 {
552 struct igb_adapter *adapter =
553 container_of(tc, struct igb_adapter, cycles);
554 struct e1000_hw *hw = &adapter->hw;
555 u64 stamp = 0;
556 int shift = 0;
557
558 /*
559 * The timestamp latches on lowest register read. For the 82580
560 * the lowest register is SYSTIMR instead of SYSTIML. However we never
561 * adjusted TIMINCA so SYSTIMR will just read as all 0s so ignore it.
562 */
563 if (hw->mac.type == e1000_82580) {
564 stamp = rd32(E1000_SYSTIMR) >> 8;
565 shift = IGB_82580_TSYNC_SHIFT;
566 }
567
568 stamp |= (u64)rd32(E1000_SYSTIML) << shift;
569 stamp |= (u64)rd32(E1000_SYSTIMH) << (shift + 32);
570 return stamp;
571 }
572
573 /**
574 * igb_get_hw_dev - return device
575 * used by hardware layer to print debugging information
576 **/
577 struct net_device *igb_get_hw_dev(struct e1000_hw *hw)
578 {
579 struct igb_adapter *adapter = hw->back;
580 return adapter->netdev;
581 }
582
583 /**
584 * igb_init_module - Driver Registration Routine
585 *
586 * igb_init_module is the first routine called when the driver is
587 * loaded. All it does is register with the PCI subsystem.
588 **/
589 static int __init igb_init_module(void)
590 {
591 int ret;
592 printk(KERN_INFO "%s - version %s\n",
593 igb_driver_string, igb_driver_version);
594
595 printk(KERN_INFO "%s\n", igb_copyright);
596
597 #ifdef CONFIG_IGB_DCA
598 dca_register_notify(&dca_notifier);
599 #endif
600 ret = pci_register_driver(&igb_driver);
601 return ret;
602 }
603
604 module_init(igb_init_module);
605
606 /**
607 * igb_exit_module - Driver Exit Cleanup Routine
608 *
609 * igb_exit_module is called just before the driver is removed
610 * from memory.
611 **/
612 static void __exit igb_exit_module(void)
613 {
614 #ifdef CONFIG_IGB_DCA
615 dca_unregister_notify(&dca_notifier);
616 #endif
617 pci_unregister_driver(&igb_driver);
618 }
619
620 module_exit(igb_exit_module);
621
622 #define Q_IDX_82576(i) (((i & 0x1) << 3) + (i >> 1))
623 /**
624 * igb_cache_ring_register - Descriptor ring to register mapping
625 * @adapter: board private structure to initialize
626 *
627 * Once we know the feature-set enabled for the device, we'll cache
628 * the register offset the descriptor ring is assigned to.
629 **/
630 static void igb_cache_ring_register(struct igb_adapter *adapter)
631 {
632 int i = 0, j = 0;
633 u32 rbase_offset = adapter->vfs_allocated_count;
634
635 switch (adapter->hw.mac.type) {
636 case e1000_82576:
637 /* The queues are allocated for virtualization such that VF 0
638 * is allocated queues 0 and 8, VF 1 queues 1 and 9, etc.
639 * In order to avoid collision we start at the first free queue
640 * and continue consuming queues in the same sequence
641 */
642 if (adapter->vfs_allocated_count) {
643 for (; i < adapter->rss_queues; i++)
644 adapter->rx_ring[i]->reg_idx = rbase_offset +
645 Q_IDX_82576(i);
646 }
647 case e1000_82575:
648 case e1000_82580:
649 case e1000_i350:
650 default:
651 for (; i < adapter->num_rx_queues; i++)
652 adapter->rx_ring[i]->reg_idx = rbase_offset + i;
653 for (; j < adapter->num_tx_queues; j++)
654 adapter->tx_ring[j]->reg_idx = rbase_offset + j;
655 break;
656 }
657 }
658
659 static void igb_free_queues(struct igb_adapter *adapter)
660 {
661 int i;
662
663 for (i = 0; i < adapter->num_tx_queues; i++) {
664 kfree(adapter->tx_ring[i]);
665 adapter->tx_ring[i] = NULL;
666 }
667 for (i = 0; i < adapter->num_rx_queues; i++) {
668 kfree(adapter->rx_ring[i]);
669 adapter->rx_ring[i] = NULL;
670 }
671 adapter->num_rx_queues = 0;
672 adapter->num_tx_queues = 0;
673 }
674
675 /**
676 * igb_alloc_queues - Allocate memory for all rings
677 * @adapter: board private structure to initialize
678 *
679 * We allocate one ring per queue at run-time since we don't know the
680 * number of queues at compile-time.
681 **/
682 static int igb_alloc_queues(struct igb_adapter *adapter)
683 {
684 struct igb_ring *ring;
685 int i;
686
687 for (i = 0; i < adapter->num_tx_queues; i++) {
688 ring = kzalloc(sizeof(struct igb_ring), GFP_KERNEL);
689 if (!ring)
690 goto err;
691 ring->count = adapter->tx_ring_count;
692 ring->queue_index = i;
693 ring->dev = &adapter->pdev->dev;
694 ring->netdev = adapter->netdev;
695 /* For 82575, context index must be unique per ring. */
696 if (adapter->hw.mac.type == e1000_82575)
697 ring->flags = IGB_RING_FLAG_TX_CTX_IDX;
698 adapter->tx_ring[i] = ring;
699 }
700
701 for (i = 0; i < adapter->num_rx_queues; i++) {
702 ring = kzalloc(sizeof(struct igb_ring), GFP_KERNEL);
703 if (!ring)
704 goto err;
705 ring->count = adapter->rx_ring_count;
706 ring->queue_index = i;
707 ring->dev = &adapter->pdev->dev;
708 ring->netdev = adapter->netdev;
709 ring->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
710 ring->flags = IGB_RING_FLAG_RX_CSUM; /* enable rx checksum */
711 /* set flag indicating ring supports SCTP checksum offload */
712 if (adapter->hw.mac.type >= e1000_82576)
713 ring->flags |= IGB_RING_FLAG_RX_SCTP_CSUM;
714 adapter->rx_ring[i] = ring;
715 }
716
717 igb_cache_ring_register(adapter);
718
719 return 0;
720
721 err:
722 igb_free_queues(adapter);
723
724 return -ENOMEM;
725 }
726
727 #define IGB_N0_QUEUE -1
728 static void igb_assign_vector(struct igb_q_vector *q_vector, int msix_vector)
729 {
730 u32 msixbm = 0;
731 struct igb_adapter *adapter = q_vector->adapter;
732 struct e1000_hw *hw = &adapter->hw;
733 u32 ivar, index;
734 int rx_queue = IGB_N0_QUEUE;
735 int tx_queue = IGB_N0_QUEUE;
736
737 if (q_vector->rx_ring)
738 rx_queue = q_vector->rx_ring->reg_idx;
739 if (q_vector->tx_ring)
740 tx_queue = q_vector->tx_ring->reg_idx;
741
742 switch (hw->mac.type) {
743 case e1000_82575:
744 /* The 82575 assigns vectors using a bitmask, which matches the
745 bitmask for the EICR/EIMS/EIMC registers. To assign one
746 or more queues to a vector, we write the appropriate bits
747 into the MSIXBM register for that vector. */
748 if (rx_queue > IGB_N0_QUEUE)
749 msixbm = E1000_EICR_RX_QUEUE0 << rx_queue;
750 if (tx_queue > IGB_N0_QUEUE)
751 msixbm |= E1000_EICR_TX_QUEUE0 << tx_queue;
752 if (!adapter->msix_entries && msix_vector == 0)
753 msixbm |= E1000_EIMS_OTHER;
754 array_wr32(E1000_MSIXBM(0), msix_vector, msixbm);
755 q_vector->eims_value = msixbm;
756 break;
757 case e1000_82576:
758 /* 82576 uses a table-based method for assigning vectors.
759 Each queue has a single entry in the table to which we write
760 a vector number along with a "valid" bit. Sadly, the layout
761 of the table is somewhat counterintuitive. */
762 if (rx_queue > IGB_N0_QUEUE) {
763 index = (rx_queue & 0x7);
764 ivar = array_rd32(E1000_IVAR0, index);
765 if (rx_queue < 8) {
766 /* vector goes into low byte of register */
767 ivar = ivar & 0xFFFFFF00;
768 ivar |= msix_vector | E1000_IVAR_VALID;
769 } else {
770 /* vector goes into third byte of register */
771 ivar = ivar & 0xFF00FFFF;
772 ivar |= (msix_vector | E1000_IVAR_VALID) << 16;
773 }
774 array_wr32(E1000_IVAR0, index, ivar);
775 }
776 if (tx_queue > IGB_N0_QUEUE) {
777 index = (tx_queue & 0x7);
778 ivar = array_rd32(E1000_IVAR0, index);
779 if (tx_queue < 8) {
780 /* vector goes into second byte of register */
781 ivar = ivar & 0xFFFF00FF;
782 ivar |= (msix_vector | E1000_IVAR_VALID) << 8;
783 } else {
784 /* vector goes into high byte of register */
785 ivar = ivar & 0x00FFFFFF;
786 ivar |= (msix_vector | E1000_IVAR_VALID) << 24;
787 }
788 array_wr32(E1000_IVAR0, index, ivar);
789 }
790 q_vector->eims_value = 1 << msix_vector;
791 break;
792 case e1000_82580:
793 case e1000_i350:
794 /* 82580 uses the same table-based approach as 82576 but has fewer
795 entries as a result we carry over for queues greater than 4. */
796 if (rx_queue > IGB_N0_QUEUE) {
797 index = (rx_queue >> 1);
798 ivar = array_rd32(E1000_IVAR0, index);
799 if (rx_queue & 0x1) {
800 /* vector goes into third byte of register */
801 ivar = ivar & 0xFF00FFFF;
802 ivar |= (msix_vector | E1000_IVAR_VALID) << 16;
803 } else {
804 /* vector goes into low byte of register */
805 ivar = ivar & 0xFFFFFF00;
806 ivar |= msix_vector | E1000_IVAR_VALID;
807 }
808 array_wr32(E1000_IVAR0, index, ivar);
809 }
810 if (tx_queue > IGB_N0_QUEUE) {
811 index = (tx_queue >> 1);
812 ivar = array_rd32(E1000_IVAR0, index);
813 if (tx_queue & 0x1) {
814 /* vector goes into high byte of register */
815 ivar = ivar & 0x00FFFFFF;
816 ivar |= (msix_vector | E1000_IVAR_VALID) << 24;
817 } else {
818 /* vector goes into second byte of register */
819 ivar = ivar & 0xFFFF00FF;
820 ivar |= (msix_vector | E1000_IVAR_VALID) << 8;
821 }
822 array_wr32(E1000_IVAR0, index, ivar);
823 }
824 q_vector->eims_value = 1 << msix_vector;
825 break;
826 default:
827 BUG();
828 break;
829 }
830
831 /* add q_vector eims value to global eims_enable_mask */
832 adapter->eims_enable_mask |= q_vector->eims_value;
833
834 /* configure q_vector to set itr on first interrupt */
835 q_vector->set_itr = 1;
836 }
837
838 /**
839 * igb_configure_msix - Configure MSI-X hardware
840 *
841 * igb_configure_msix sets up the hardware to properly
842 * generate MSI-X interrupts.
843 **/
844 static void igb_configure_msix(struct igb_adapter *adapter)
845 {
846 u32 tmp;
847 int i, vector = 0;
848 struct e1000_hw *hw = &adapter->hw;
849
850 adapter->eims_enable_mask = 0;
851
852 /* set vector for other causes, i.e. link changes */
853 switch (hw->mac.type) {
854 case e1000_82575:
855 tmp = rd32(E1000_CTRL_EXT);
856 /* enable MSI-X PBA support*/
857 tmp |= E1000_CTRL_EXT_PBA_CLR;
858
859 /* Auto-Mask interrupts upon ICR read. */
860 tmp |= E1000_CTRL_EXT_EIAME;
861 tmp |= E1000_CTRL_EXT_IRCA;
862
863 wr32(E1000_CTRL_EXT, tmp);
864
865 /* enable msix_other interrupt */
866 array_wr32(E1000_MSIXBM(0), vector++,
867 E1000_EIMS_OTHER);
868 adapter->eims_other = E1000_EIMS_OTHER;
869
870 break;
871
872 case e1000_82576:
873 case e1000_82580:
874 case e1000_i350:
875 /* Turn on MSI-X capability first, or our settings
876 * won't stick. And it will take days to debug. */
877 wr32(E1000_GPIE, E1000_GPIE_MSIX_MODE |
878 E1000_GPIE_PBA | E1000_GPIE_EIAME |
879 E1000_GPIE_NSICR);
880
881 /* enable msix_other interrupt */
882 adapter->eims_other = 1 << vector;
883 tmp = (vector++ | E1000_IVAR_VALID) << 8;
884
885 wr32(E1000_IVAR_MISC, tmp);
886 break;
887 default:
888 /* do nothing, since nothing else supports MSI-X */
889 break;
890 } /* switch (hw->mac.type) */
891
892 adapter->eims_enable_mask |= adapter->eims_other;
893
894 for (i = 0; i < adapter->num_q_vectors; i++)
895 igb_assign_vector(adapter->q_vector[i], vector++);
896
897 wrfl();
898 }
899
900 /**
901 * igb_request_msix - Initialize MSI-X interrupts
902 *
903 * igb_request_msix allocates MSI-X vectors and requests interrupts from the
904 * kernel.
905 **/
906 static int igb_request_msix(struct igb_adapter *adapter)
907 {
908 struct net_device *netdev = adapter->netdev;
909 struct e1000_hw *hw = &adapter->hw;
910 int i, err = 0, vector = 0;
911
912 err = request_irq(adapter->msix_entries[vector].vector,
913 igb_msix_other, 0, netdev->name, adapter);
914 if (err)
915 goto out;
916 vector++;
917
918 for (i = 0; i < adapter->num_q_vectors; i++) {
919 struct igb_q_vector *q_vector = adapter->q_vector[i];
920
921 q_vector->itr_register = hw->hw_addr + E1000_EITR(vector);
922
923 if (q_vector->rx_ring && q_vector->tx_ring)
924 sprintf(q_vector->name, "%s-TxRx-%u", netdev->name,
925 q_vector->rx_ring->queue_index);
926 else if (q_vector->tx_ring)
927 sprintf(q_vector->name, "%s-tx-%u", netdev->name,
928 q_vector->tx_ring->queue_index);
929 else if (q_vector->rx_ring)
930 sprintf(q_vector->name, "%s-rx-%u", netdev->name,
931 q_vector->rx_ring->queue_index);
932 else
933 sprintf(q_vector->name, "%s-unused", netdev->name);
934
935 err = request_irq(adapter->msix_entries[vector].vector,
936 igb_msix_ring, 0, q_vector->name,
937 q_vector);
938 if (err)
939 goto out;
940 vector++;
941 }
942
943 igb_configure_msix(adapter);
944 return 0;
945 out:
946 return err;
947 }
948
949 static void igb_reset_interrupt_capability(struct igb_adapter *adapter)
950 {
951 if (adapter->msix_entries) {
952 pci_disable_msix(adapter->pdev);
953 kfree(adapter->msix_entries);
954 adapter->msix_entries = NULL;
955 } else if (adapter->flags & IGB_FLAG_HAS_MSI) {
956 pci_disable_msi(adapter->pdev);
957 }
958 }
959
960 /**
961 * igb_free_q_vectors - Free memory allocated for interrupt vectors
962 * @adapter: board private structure to initialize
963 *
964 * This function frees the memory allocated to the q_vectors. In addition if
965 * NAPI is enabled it will delete any references to the NAPI struct prior
966 * to freeing the q_vector.
967 **/
968 static void igb_free_q_vectors(struct igb_adapter *adapter)
969 {
970 int v_idx;
971
972 for (v_idx = 0; v_idx < adapter->num_q_vectors; v_idx++) {
973 struct igb_q_vector *q_vector = adapter->q_vector[v_idx];
974 adapter->q_vector[v_idx] = NULL;
975 if (!q_vector)
976 continue;
977 netif_napi_del(&q_vector->napi);
978 kfree(q_vector);
979 }
980 adapter->num_q_vectors = 0;
981 }
982
983 /**
984 * igb_clear_interrupt_scheme - reset the device to a state of no interrupts
985 *
986 * This function resets the device so that it has 0 rx queues, tx queues, and
987 * MSI-X interrupts allocated.
988 */
989 static void igb_clear_interrupt_scheme(struct igb_adapter *adapter)
990 {
991 igb_free_queues(adapter);
992 igb_free_q_vectors(adapter);
993 igb_reset_interrupt_capability(adapter);
994 }
995
996 /**
997 * igb_set_interrupt_capability - set MSI or MSI-X if supported
998 *
999 * Attempt to configure interrupts using the best available
1000 * capabilities of the hardware and kernel.
1001 **/
1002 static int igb_set_interrupt_capability(struct igb_adapter *adapter)
1003 {
1004 int err;
1005 int numvecs, i;
1006
1007 /* Number of supported queues. */
1008 adapter->num_rx_queues = adapter->rss_queues;
1009 if (adapter->vfs_allocated_count)
1010 adapter->num_tx_queues = 1;
1011 else
1012 adapter->num_tx_queues = adapter->rss_queues;
1013
1014 /* start with one vector for every rx queue */
1015 numvecs = adapter->num_rx_queues;
1016
1017 /* if tx handler is separate add 1 for every tx queue */
1018 if (!(adapter->flags & IGB_FLAG_QUEUE_PAIRS))
1019 numvecs += adapter->num_tx_queues;
1020
1021 /* store the number of vectors reserved for queues */
1022 adapter->num_q_vectors = numvecs;
1023
1024 /* add 1 vector for link status interrupts */
1025 numvecs++;
1026 adapter->msix_entries = kcalloc(numvecs, sizeof(struct msix_entry),
1027 GFP_KERNEL);
1028 if (!adapter->msix_entries)
1029 goto msi_only;
1030
1031 for (i = 0; i < numvecs; i++)
1032 adapter->msix_entries[i].entry = i;
1033
1034 err = pci_enable_msix(adapter->pdev,
1035 adapter->msix_entries,
1036 numvecs);
1037 if (err == 0)
1038 goto out;
1039
1040 igb_reset_interrupt_capability(adapter);
1041
1042 /* If we can't do MSI-X, try MSI */
1043 msi_only:
1044 #ifdef CONFIG_PCI_IOV
1045 /* disable SR-IOV for non MSI-X configurations */
1046 if (adapter->vf_data) {
1047 struct e1000_hw *hw = &adapter->hw;
1048 /* disable iov and allow time for transactions to clear */
1049 pci_disable_sriov(adapter->pdev);
1050 msleep(500);
1051
1052 kfree(adapter->vf_data);
1053 adapter->vf_data = NULL;
1054 wr32(E1000_IOVCTL, E1000_IOVCTL_REUSE_VFQ);
1055 msleep(100);
1056 dev_info(&adapter->pdev->dev, "IOV Disabled\n");
1057 }
1058 #endif
1059 adapter->vfs_allocated_count = 0;
1060 adapter->rss_queues = 1;
1061 adapter->flags |= IGB_FLAG_QUEUE_PAIRS;
1062 adapter->num_rx_queues = 1;
1063 adapter->num_tx_queues = 1;
1064 adapter->num_q_vectors = 1;
1065 if (!pci_enable_msi(adapter->pdev))
1066 adapter->flags |= IGB_FLAG_HAS_MSI;
1067 out:
1068 /* Notify the stack of the (possibly) reduced queue counts. */
1069 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
1070 return netif_set_real_num_rx_queues(adapter->netdev,
1071 adapter->num_rx_queues);
1072 }
1073
1074 /**
1075 * igb_alloc_q_vectors - Allocate memory for interrupt vectors
1076 * @adapter: board private structure to initialize
1077 *
1078 * We allocate one q_vector per queue interrupt. If allocation fails we
1079 * return -ENOMEM.
1080 **/
1081 static int igb_alloc_q_vectors(struct igb_adapter *adapter)
1082 {
1083 struct igb_q_vector *q_vector;
1084 struct e1000_hw *hw = &adapter->hw;
1085 int v_idx;
1086
1087 for (v_idx = 0; v_idx < adapter->num_q_vectors; v_idx++) {
1088 q_vector = kzalloc(sizeof(struct igb_q_vector), GFP_KERNEL);
1089 if (!q_vector)
1090 goto err_out;
1091 q_vector->adapter = adapter;
1092 q_vector->itr_register = hw->hw_addr + E1000_EITR(0);
1093 q_vector->itr_val = IGB_START_ITR;
1094 netif_napi_add(adapter->netdev, &q_vector->napi, igb_poll, 64);
1095 adapter->q_vector[v_idx] = q_vector;
1096 }
1097 return 0;
1098
1099 err_out:
1100 igb_free_q_vectors(adapter);
1101 return -ENOMEM;
1102 }
1103
1104 static void igb_map_rx_ring_to_vector(struct igb_adapter *adapter,
1105 int ring_idx, int v_idx)
1106 {
1107 struct igb_q_vector *q_vector = adapter->q_vector[v_idx];
1108
1109 q_vector->rx_ring = adapter->rx_ring[ring_idx];
1110 q_vector->rx_ring->q_vector = q_vector;
1111 q_vector->itr_val = adapter->rx_itr_setting;
1112 if (q_vector->itr_val && q_vector->itr_val <= 3)
1113 q_vector->itr_val = IGB_START_ITR;
1114 }
1115
1116 static void igb_map_tx_ring_to_vector(struct igb_adapter *adapter,
1117 int ring_idx, int v_idx)
1118 {
1119 struct igb_q_vector *q_vector = adapter->q_vector[v_idx];
1120
1121 q_vector->tx_ring = adapter->tx_ring[ring_idx];
1122 q_vector->tx_ring->q_vector = q_vector;
1123 q_vector->itr_val = adapter->tx_itr_setting;
1124 if (q_vector->itr_val && q_vector->itr_val <= 3)
1125 q_vector->itr_val = IGB_START_ITR;
1126 }
1127
1128 /**
1129 * igb_map_ring_to_vector - maps allocated queues to vectors
1130 *
1131 * This function maps the recently allocated queues to vectors.
1132 **/
1133 static int igb_map_ring_to_vector(struct igb_adapter *adapter)
1134 {
1135 int i;
1136 int v_idx = 0;
1137
1138 if ((adapter->num_q_vectors < adapter->num_rx_queues) ||
1139 (adapter->num_q_vectors < adapter->num_tx_queues))
1140 return -ENOMEM;
1141
1142 if (adapter->num_q_vectors >=
1143 (adapter->num_rx_queues + adapter->num_tx_queues)) {
1144 for (i = 0; i < adapter->num_rx_queues; i++)
1145 igb_map_rx_ring_to_vector(adapter, i, v_idx++);
1146 for (i = 0; i < adapter->num_tx_queues; i++)
1147 igb_map_tx_ring_to_vector(adapter, i, v_idx++);
1148 } else {
1149 for (i = 0; i < adapter->num_rx_queues; i++) {
1150 if (i < adapter->num_tx_queues)
1151 igb_map_tx_ring_to_vector(adapter, i, v_idx);
1152 igb_map_rx_ring_to_vector(adapter, i, v_idx++);
1153 }
1154 for (; i < adapter->num_tx_queues; i++)
1155 igb_map_tx_ring_to_vector(adapter, i, v_idx++);
1156 }
1157 return 0;
1158 }
1159
1160 /**
1161 * igb_init_interrupt_scheme - initialize interrupts, allocate queues/vectors
1162 *
1163 * This function initializes the interrupts and allocates all of the queues.
1164 **/
1165 static int igb_init_interrupt_scheme(struct igb_adapter *adapter)
1166 {
1167 struct pci_dev *pdev = adapter->pdev;
1168 int err;
1169
1170 err = igb_set_interrupt_capability(adapter);
1171 if (err)
1172 return err;
1173
1174 err = igb_alloc_q_vectors(adapter);
1175 if (err) {
1176 dev_err(&pdev->dev, "Unable to allocate memory for vectors\n");
1177 goto err_alloc_q_vectors;
1178 }
1179
1180 err = igb_alloc_queues(adapter);
1181 if (err) {
1182 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
1183 goto err_alloc_queues;
1184 }
1185
1186 err = igb_map_ring_to_vector(adapter);
1187 if (err) {
1188 dev_err(&pdev->dev, "Invalid q_vector to ring mapping\n");
1189 goto err_map_queues;
1190 }
1191
1192
1193 return 0;
1194 err_map_queues:
1195 igb_free_queues(adapter);
1196 err_alloc_queues:
1197 igb_free_q_vectors(adapter);
1198 err_alloc_q_vectors:
1199 igb_reset_interrupt_capability(adapter);
1200 return err;
1201 }
1202
1203 /**
1204 * igb_request_irq - initialize interrupts
1205 *
1206 * Attempts to configure interrupts using the best available
1207 * capabilities of the hardware and kernel.
1208 **/
1209 static int igb_request_irq(struct igb_adapter *adapter)
1210 {
1211 struct net_device *netdev = adapter->netdev;
1212 struct pci_dev *pdev = adapter->pdev;
1213 int err = 0;
1214
1215 if (adapter->msix_entries) {
1216 err = igb_request_msix(adapter);
1217 if (!err)
1218 goto request_done;
1219 /* fall back to MSI */
1220 igb_clear_interrupt_scheme(adapter);
1221 if (!pci_enable_msi(adapter->pdev))
1222 adapter->flags |= IGB_FLAG_HAS_MSI;
1223 igb_free_all_tx_resources(adapter);
1224 igb_free_all_rx_resources(adapter);
1225 adapter->num_tx_queues = 1;
1226 adapter->num_rx_queues = 1;
1227 adapter->num_q_vectors = 1;
1228 err = igb_alloc_q_vectors(adapter);
1229 if (err) {
1230 dev_err(&pdev->dev,
1231 "Unable to allocate memory for vectors\n");
1232 goto request_done;
1233 }
1234 err = igb_alloc_queues(adapter);
1235 if (err) {
1236 dev_err(&pdev->dev,
1237 "Unable to allocate memory for queues\n");
1238 igb_free_q_vectors(adapter);
1239 goto request_done;
1240 }
1241 igb_setup_all_tx_resources(adapter);
1242 igb_setup_all_rx_resources(adapter);
1243 } else {
1244 igb_assign_vector(adapter->q_vector[0], 0);
1245 }
1246
1247 if (adapter->flags & IGB_FLAG_HAS_MSI) {
1248 err = request_irq(adapter->pdev->irq, igb_intr_msi, 0,
1249 netdev->name, adapter);
1250 if (!err)
1251 goto request_done;
1252
1253 /* fall back to legacy interrupts */
1254 igb_reset_interrupt_capability(adapter);
1255 adapter->flags &= ~IGB_FLAG_HAS_MSI;
1256 }
1257
1258 err = request_irq(adapter->pdev->irq, igb_intr, IRQF_SHARED,
1259 netdev->name, adapter);
1260
1261 if (err)
1262 dev_err(&adapter->pdev->dev, "Error %d getting interrupt\n",
1263 err);
1264
1265 request_done:
1266 return err;
1267 }
1268
1269 static void igb_free_irq(struct igb_adapter *adapter)
1270 {
1271 if (adapter->msix_entries) {
1272 int vector = 0, i;
1273
1274 free_irq(adapter->msix_entries[vector++].vector, adapter);
1275
1276 for (i = 0; i < adapter->num_q_vectors; i++) {
1277 struct igb_q_vector *q_vector = adapter->q_vector[i];
1278 free_irq(adapter->msix_entries[vector++].vector,
1279 q_vector);
1280 }
1281 } else {
1282 free_irq(adapter->pdev->irq, adapter);
1283 }
1284 }
1285
1286 /**
1287 * igb_irq_disable - Mask off interrupt generation on the NIC
1288 * @adapter: board private structure
1289 **/
1290 static void igb_irq_disable(struct igb_adapter *adapter)
1291 {
1292 struct e1000_hw *hw = &adapter->hw;
1293
1294 /*
1295 * we need to be careful when disabling interrupts. The VFs are also
1296 * mapped into these registers and so clearing the bits can cause
1297 * issues on the VF drivers so we only need to clear what we set
1298 */
1299 if (adapter->msix_entries) {
1300 u32 regval = rd32(E1000_EIAM);
1301 wr32(E1000_EIAM, regval & ~adapter->eims_enable_mask);
1302 wr32(E1000_EIMC, adapter->eims_enable_mask);
1303 regval = rd32(E1000_EIAC);
1304 wr32(E1000_EIAC, regval & ~adapter->eims_enable_mask);
1305 }
1306
1307 wr32(E1000_IAM, 0);
1308 wr32(E1000_IMC, ~0);
1309 wrfl();
1310 if (adapter->msix_entries) {
1311 int i;
1312 for (i = 0; i < adapter->num_q_vectors; i++)
1313 synchronize_irq(adapter->msix_entries[i].vector);
1314 } else {
1315 synchronize_irq(adapter->pdev->irq);
1316 }
1317 }
1318
1319 /**
1320 * igb_irq_enable - Enable default interrupt generation settings
1321 * @adapter: board private structure
1322 **/
1323 static void igb_irq_enable(struct igb_adapter *adapter)
1324 {
1325 struct e1000_hw *hw = &adapter->hw;
1326
1327 if (adapter->msix_entries) {
1328 u32 ims = E1000_IMS_LSC | E1000_IMS_DOUTSYNC;
1329 u32 regval = rd32(E1000_EIAC);
1330 wr32(E1000_EIAC, regval | adapter->eims_enable_mask);
1331 regval = rd32(E1000_EIAM);
1332 wr32(E1000_EIAM, regval | adapter->eims_enable_mask);
1333 wr32(E1000_EIMS, adapter->eims_enable_mask);
1334 if (adapter->vfs_allocated_count) {
1335 wr32(E1000_MBVFIMR, 0xFF);
1336 ims |= E1000_IMS_VMMB;
1337 }
1338 if (adapter->hw.mac.type == e1000_82580)
1339 ims |= E1000_IMS_DRSTA;
1340
1341 wr32(E1000_IMS, ims);
1342 } else {
1343 wr32(E1000_IMS, IMS_ENABLE_MASK |
1344 E1000_IMS_DRSTA);
1345 wr32(E1000_IAM, IMS_ENABLE_MASK |
1346 E1000_IMS_DRSTA);
1347 }
1348 }
1349
1350 static void igb_update_mng_vlan(struct igb_adapter *adapter)
1351 {
1352 struct e1000_hw *hw = &adapter->hw;
1353 u16 vid = adapter->hw.mng_cookie.vlan_id;
1354 u16 old_vid = adapter->mng_vlan_id;
1355
1356 if (hw->mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
1357 /* add VID to filter table */
1358 igb_vfta_set(hw, vid, true);
1359 adapter->mng_vlan_id = vid;
1360 } else {
1361 adapter->mng_vlan_id = IGB_MNG_VLAN_NONE;
1362 }
1363
1364 if ((old_vid != (u16)IGB_MNG_VLAN_NONE) &&
1365 (vid != old_vid) &&
1366 !vlan_group_get_device(adapter->vlgrp, old_vid)) {
1367 /* remove VID from filter table */
1368 igb_vfta_set(hw, old_vid, false);
1369 }
1370 }
1371
1372 /**
1373 * igb_release_hw_control - release control of the h/w to f/w
1374 * @adapter: address of board private structure
1375 *
1376 * igb_release_hw_control resets CTRL_EXT:DRV_LOAD bit.
1377 * For ASF and Pass Through versions of f/w this means that the
1378 * driver is no longer loaded.
1379 *
1380 **/
1381 static void igb_release_hw_control(struct igb_adapter *adapter)
1382 {
1383 struct e1000_hw *hw = &adapter->hw;
1384 u32 ctrl_ext;
1385
1386 /* Let firmware take over control of h/w */
1387 ctrl_ext = rd32(E1000_CTRL_EXT);
1388 wr32(E1000_CTRL_EXT,
1389 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
1390 }
1391
1392 /**
1393 * igb_get_hw_control - get control of the h/w from f/w
1394 * @adapter: address of board private structure
1395 *
1396 * igb_get_hw_control sets CTRL_EXT:DRV_LOAD bit.
1397 * For ASF and Pass Through versions of f/w this means that
1398 * the driver is loaded.
1399 *
1400 **/
1401 static void igb_get_hw_control(struct igb_adapter *adapter)
1402 {
1403 struct e1000_hw *hw = &adapter->hw;
1404 u32 ctrl_ext;
1405
1406 /* Let firmware know the driver has taken over */
1407 ctrl_ext = rd32(E1000_CTRL_EXT);
1408 wr32(E1000_CTRL_EXT,
1409 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
1410 }
1411
1412 /**
1413 * igb_configure - configure the hardware for RX and TX
1414 * @adapter: private board structure
1415 **/
1416 static void igb_configure(struct igb_adapter *adapter)
1417 {
1418 struct net_device *netdev = adapter->netdev;
1419 int i;
1420
1421 igb_get_hw_control(adapter);
1422 igb_set_rx_mode(netdev);
1423
1424 igb_restore_vlan(adapter);
1425
1426 igb_setup_tctl(adapter);
1427 igb_setup_mrqc(adapter);
1428 igb_setup_rctl(adapter);
1429
1430 igb_configure_tx(adapter);
1431 igb_configure_rx(adapter);
1432
1433 igb_rx_fifo_flush_82575(&adapter->hw);
1434
1435 /* call igb_desc_unused which always leaves
1436 * at least 1 descriptor unused to make sure
1437 * next_to_use != next_to_clean */
1438 for (i = 0; i < adapter->num_rx_queues; i++) {
1439 struct igb_ring *ring = adapter->rx_ring[i];
1440 igb_alloc_rx_buffers_adv(ring, igb_desc_unused(ring));
1441 }
1442 }
1443
1444 /**
1445 * igb_power_up_link - Power up the phy/serdes link
1446 * @adapter: address of board private structure
1447 **/
1448 void igb_power_up_link(struct igb_adapter *adapter)
1449 {
1450 if (adapter->hw.phy.media_type == e1000_media_type_copper)
1451 igb_power_up_phy_copper(&adapter->hw);
1452 else
1453 igb_power_up_serdes_link_82575(&adapter->hw);
1454 }
1455
1456 /**
1457 * igb_power_down_link - Power down the phy/serdes link
1458 * @adapter: address of board private structure
1459 */
1460 static void igb_power_down_link(struct igb_adapter *adapter)
1461 {
1462 if (adapter->hw.phy.media_type == e1000_media_type_copper)
1463 igb_power_down_phy_copper_82575(&adapter->hw);
1464 else
1465 igb_shutdown_serdes_link_82575(&adapter->hw);
1466 }
1467
1468 /**
1469 * igb_up - Open the interface and prepare it to handle traffic
1470 * @adapter: board private structure
1471 **/
1472 int igb_up(struct igb_adapter *adapter)
1473 {
1474 struct e1000_hw *hw = &adapter->hw;
1475 int i;
1476
1477 /* hardware has been reset, we need to reload some things */
1478 igb_configure(adapter);
1479
1480 clear_bit(__IGB_DOWN, &adapter->state);
1481
1482 for (i = 0; i < adapter->num_q_vectors; i++) {
1483 struct igb_q_vector *q_vector = adapter->q_vector[i];
1484 napi_enable(&q_vector->napi);
1485 }
1486 if (adapter->msix_entries)
1487 igb_configure_msix(adapter);
1488 else
1489 igb_assign_vector(adapter->q_vector[0], 0);
1490
1491 /* Clear any pending interrupts. */
1492 rd32(E1000_ICR);
1493 igb_irq_enable(adapter);
1494
1495 /* notify VFs that reset has been completed */
1496 if (adapter->vfs_allocated_count) {
1497 u32 reg_data = rd32(E1000_CTRL_EXT);
1498 reg_data |= E1000_CTRL_EXT_PFRSTD;
1499 wr32(E1000_CTRL_EXT, reg_data);
1500 }
1501
1502 netif_tx_start_all_queues(adapter->netdev);
1503
1504 /* start the watchdog. */
1505 hw->mac.get_link_status = 1;
1506 schedule_work(&adapter->watchdog_task);
1507
1508 return 0;
1509 }
1510
1511 void igb_down(struct igb_adapter *adapter)
1512 {
1513 struct net_device *netdev = adapter->netdev;
1514 struct e1000_hw *hw = &adapter->hw;
1515 u32 tctl, rctl;
1516 int i;
1517
1518 /* signal that we're down so the interrupt handler does not
1519 * reschedule our watchdog timer */
1520 set_bit(__IGB_DOWN, &adapter->state);
1521
1522 /* disable receives in the hardware */
1523 rctl = rd32(E1000_RCTL);
1524 wr32(E1000_RCTL, rctl & ~E1000_RCTL_EN);
1525 /* flush and sleep below */
1526
1527 netif_tx_stop_all_queues(netdev);
1528
1529 /* disable transmits in the hardware */
1530 tctl = rd32(E1000_TCTL);
1531 tctl &= ~E1000_TCTL_EN;
1532 wr32(E1000_TCTL, tctl);
1533 /* flush both disables and wait for them to finish */
1534 wrfl();
1535 msleep(10);
1536
1537 for (i = 0; i < adapter->num_q_vectors; i++) {
1538 struct igb_q_vector *q_vector = adapter->q_vector[i];
1539 napi_disable(&q_vector->napi);
1540 }
1541
1542 igb_irq_disable(adapter);
1543
1544 del_timer_sync(&adapter->watchdog_timer);
1545 del_timer_sync(&adapter->phy_info_timer);
1546
1547 netif_carrier_off(netdev);
1548
1549 /* record the stats before reset*/
1550 spin_lock(&adapter->stats64_lock);
1551 igb_update_stats(adapter, &adapter->stats64);
1552 spin_unlock(&adapter->stats64_lock);
1553
1554 adapter->link_speed = 0;
1555 adapter->link_duplex = 0;
1556
1557 if (!pci_channel_offline(adapter->pdev))
1558 igb_reset(adapter);
1559 igb_clean_all_tx_rings(adapter);
1560 igb_clean_all_rx_rings(adapter);
1561 #ifdef CONFIG_IGB_DCA
1562
1563 /* since we reset the hardware DCA settings were cleared */
1564 igb_setup_dca(adapter);
1565 #endif
1566 }
1567
1568 void igb_reinit_locked(struct igb_adapter *adapter)
1569 {
1570 WARN_ON(in_interrupt());
1571 while (test_and_set_bit(__IGB_RESETTING, &adapter->state))
1572 msleep(1);
1573 igb_down(adapter);
1574 igb_up(adapter);
1575 clear_bit(__IGB_RESETTING, &adapter->state);
1576 }
1577
1578 void igb_reset(struct igb_adapter *adapter)
1579 {
1580 struct pci_dev *pdev = adapter->pdev;
1581 struct e1000_hw *hw = &adapter->hw;
1582 struct e1000_mac_info *mac = &hw->mac;
1583 struct e1000_fc_info *fc = &hw->fc;
1584 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
1585 u16 hwm;
1586
1587 /* Repartition Pba for greater than 9k mtu
1588 * To take effect CTRL.RST is required.
1589 */
1590 switch (mac->type) {
1591 case e1000_i350:
1592 case e1000_82580:
1593 pba = rd32(E1000_RXPBS);
1594 pba = igb_rxpbs_adjust_82580(pba);
1595 break;
1596 case e1000_82576:
1597 pba = rd32(E1000_RXPBS);
1598 pba &= E1000_RXPBS_SIZE_MASK_82576;
1599 break;
1600 case e1000_82575:
1601 default:
1602 pba = E1000_PBA_34K;
1603 break;
1604 }
1605
1606 if ((adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) &&
1607 (mac->type < e1000_82576)) {
1608 /* adjust PBA for jumbo frames */
1609 wr32(E1000_PBA, pba);
1610
1611 /* To maintain wire speed transmits, the Tx FIFO should be
1612 * large enough to accommodate two full transmit packets,
1613 * rounded up to the next 1KB and expressed in KB. Likewise,
1614 * the Rx FIFO should be large enough to accommodate at least
1615 * one full receive packet and is similarly rounded up and
1616 * expressed in KB. */
1617 pba = rd32(E1000_PBA);
1618 /* upper 16 bits has Tx packet buffer allocation size in KB */
1619 tx_space = pba >> 16;
1620 /* lower 16 bits has Rx packet buffer allocation size in KB */
1621 pba &= 0xffff;
1622 /* the tx fifo also stores 16 bytes of information about the tx
1623 * but don't include ethernet FCS because hardware appends it */
1624 min_tx_space = (adapter->max_frame_size +
1625 sizeof(union e1000_adv_tx_desc) -
1626 ETH_FCS_LEN) * 2;
1627 min_tx_space = ALIGN(min_tx_space, 1024);
1628 min_tx_space >>= 10;
1629 /* software strips receive CRC, so leave room for it */
1630 min_rx_space = adapter->max_frame_size;
1631 min_rx_space = ALIGN(min_rx_space, 1024);
1632 min_rx_space >>= 10;
1633
1634 /* If current Tx allocation is less than the min Tx FIFO size,
1635 * and the min Tx FIFO size is less than the current Rx FIFO
1636 * allocation, take space away from current Rx allocation */
1637 if (tx_space < min_tx_space &&
1638 ((min_tx_space - tx_space) < pba)) {
1639 pba = pba - (min_tx_space - tx_space);
1640
1641 /* if short on rx space, rx wins and must trump tx
1642 * adjustment */
1643 if (pba < min_rx_space)
1644 pba = min_rx_space;
1645 }
1646 wr32(E1000_PBA, pba);
1647 }
1648
1649 /* flow control settings */
1650 /* The high water mark must be low enough to fit one full frame
1651 * (or the size used for early receive) above it in the Rx FIFO.
1652 * Set it to the lower of:
1653 * - 90% of the Rx FIFO size, or
1654 * - the full Rx FIFO size minus one full frame */
1655 hwm = min(((pba << 10) * 9 / 10),
1656 ((pba << 10) - 2 * adapter->max_frame_size));
1657
1658 fc->high_water = hwm & 0xFFF0; /* 16-byte granularity */
1659 fc->low_water = fc->high_water - 16;
1660 fc->pause_time = 0xFFFF;
1661 fc->send_xon = 1;
1662 fc->current_mode = fc->requested_mode;
1663
1664 /* disable receive for all VFs and wait one second */
1665 if (adapter->vfs_allocated_count) {
1666 int i;
1667 for (i = 0 ; i < adapter->vfs_allocated_count; i++)
1668 adapter->vf_data[i].flags &= IGB_VF_FLAG_PF_SET_MAC;
1669
1670 /* ping all the active vfs to let them know we are going down */
1671 igb_ping_all_vfs(adapter);
1672
1673 /* disable transmits and receives */
1674 wr32(E1000_VFRE, 0);
1675 wr32(E1000_VFTE, 0);
1676 }
1677
1678 /* Allow time for pending master requests to run */
1679 hw->mac.ops.reset_hw(hw);
1680 wr32(E1000_WUC, 0);
1681
1682 if (hw->mac.ops.init_hw(hw))
1683 dev_err(&pdev->dev, "Hardware Error\n");
1684 if (hw->mac.type > e1000_82580) {
1685 if (adapter->flags & IGB_FLAG_DMAC) {
1686 u32 reg;
1687
1688 /*
1689 * DMA Coalescing high water mark needs to be higher
1690 * than * the * Rx threshold. The Rx threshold is
1691 * currently * pba - 6, so we * should use a high water
1692 * mark of pba * - 4. */
1693 hwm = (pba - 4) << 10;
1694
1695 reg = (((pba-6) << E1000_DMACR_DMACTHR_SHIFT)
1696 & E1000_DMACR_DMACTHR_MASK);
1697
1698 /* transition to L0x or L1 if available..*/
1699 reg |= (E1000_DMACR_DMAC_EN | E1000_DMACR_DMAC_LX_MASK);
1700
1701 /* watchdog timer= +-1000 usec in 32usec intervals */
1702 reg |= (1000 >> 5);
1703 wr32(E1000_DMACR, reg);
1704
1705 /* no lower threshold to disable coalescing(smart fifb)
1706 * -UTRESH=0*/
1707 wr32(E1000_DMCRTRH, 0);
1708
1709 /* set hwm to PBA - 2 * max frame size */
1710 wr32(E1000_FCRTC, hwm);
1711
1712 /*
1713 * This sets the time to wait before requesting tran-
1714 * sition to * low power state to number of usecs needed
1715 * to receive 1 512 * byte frame at gigabit line rate
1716 */
1717 reg = rd32(E1000_DMCTLX);
1718 reg |= IGB_DMCTLX_DCFLUSH_DIS;
1719
1720 /* Delay 255 usec before entering Lx state. */
1721 reg |= 0xFF;
1722 wr32(E1000_DMCTLX, reg);
1723
1724 /* free space in Tx packet buffer to wake from DMAC */
1725 wr32(E1000_DMCTXTH,
1726 (IGB_MIN_TXPBSIZE -
1727 (IGB_TX_BUF_4096 + adapter->max_frame_size))
1728 >> 6);
1729
1730 /* make low power state decision controlled by DMAC */
1731 reg = rd32(E1000_PCIEMISC);
1732 reg |= E1000_PCIEMISC_LX_DECISION;
1733 wr32(E1000_PCIEMISC, reg);
1734 } /* end if IGB_FLAG_DMAC set */
1735 }
1736 if (hw->mac.type == e1000_82580) {
1737 u32 reg = rd32(E1000_PCIEMISC);
1738 wr32(E1000_PCIEMISC,
1739 reg & ~E1000_PCIEMISC_LX_DECISION);
1740 }
1741 if (!netif_running(adapter->netdev))
1742 igb_power_down_link(adapter);
1743
1744 igb_update_mng_vlan(adapter);
1745
1746 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
1747 wr32(E1000_VET, ETHERNET_IEEE_VLAN_TYPE);
1748
1749 igb_get_phy_info(hw);
1750 }
1751
1752 static const struct net_device_ops igb_netdev_ops = {
1753 .ndo_open = igb_open,
1754 .ndo_stop = igb_close,
1755 .ndo_start_xmit = igb_xmit_frame_adv,
1756 .ndo_get_stats64 = igb_get_stats64,
1757 .ndo_set_rx_mode = igb_set_rx_mode,
1758 .ndo_set_multicast_list = igb_set_rx_mode,
1759 .ndo_set_mac_address = igb_set_mac,
1760 .ndo_change_mtu = igb_change_mtu,
1761 .ndo_do_ioctl = igb_ioctl,
1762 .ndo_tx_timeout = igb_tx_timeout,
1763 .ndo_validate_addr = eth_validate_addr,
1764 .ndo_vlan_rx_register = igb_vlan_rx_register,
1765 .ndo_vlan_rx_add_vid = igb_vlan_rx_add_vid,
1766 .ndo_vlan_rx_kill_vid = igb_vlan_rx_kill_vid,
1767 .ndo_set_vf_mac = igb_ndo_set_vf_mac,
1768 .ndo_set_vf_vlan = igb_ndo_set_vf_vlan,
1769 .ndo_set_vf_tx_rate = igb_ndo_set_vf_bw,
1770 .ndo_get_vf_config = igb_ndo_get_vf_config,
1771 #ifdef CONFIG_NET_POLL_CONTROLLER
1772 .ndo_poll_controller = igb_netpoll,
1773 #endif
1774 };
1775
1776 /**
1777 * igb_probe - Device Initialization Routine
1778 * @pdev: PCI device information struct
1779 * @ent: entry in igb_pci_tbl
1780 *
1781 * Returns 0 on success, negative on failure
1782 *
1783 * igb_probe initializes an adapter identified by a pci_dev structure.
1784 * The OS initialization, configuring of the adapter private structure,
1785 * and a hardware reset occur.
1786 **/
1787 static int __devinit igb_probe(struct pci_dev *pdev,
1788 const struct pci_device_id *ent)
1789 {
1790 struct net_device *netdev;
1791 struct igb_adapter *adapter;
1792 struct e1000_hw *hw;
1793 u16 eeprom_data = 0;
1794 s32 ret_val;
1795 static int global_quad_port_a; /* global quad port a indication */
1796 const struct e1000_info *ei = igb_info_tbl[ent->driver_data];
1797 unsigned long mmio_start, mmio_len;
1798 int err, pci_using_dac;
1799 u16 eeprom_apme_mask = IGB_EEPROM_APME;
1800 u8 part_str[E1000_PBANUM_LENGTH];
1801
1802 /* Catch broken hardware that put the wrong VF device ID in
1803 * the PCIe SR-IOV capability.
1804 */
1805 if (pdev->is_virtfn) {
1806 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
1807 pci_name(pdev), pdev->vendor, pdev->device);
1808 return -EINVAL;
1809 }
1810
1811 err = pci_enable_device_mem(pdev);
1812 if (err)
1813 return err;
1814
1815 pci_using_dac = 0;
1816 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
1817 if (!err) {
1818 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
1819 if (!err)
1820 pci_using_dac = 1;
1821 } else {
1822 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
1823 if (err) {
1824 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1825 if (err) {
1826 dev_err(&pdev->dev, "No usable DMA "
1827 "configuration, aborting\n");
1828 goto err_dma;
1829 }
1830 }
1831 }
1832
1833 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
1834 IORESOURCE_MEM),
1835 igb_driver_name);
1836 if (err)
1837 goto err_pci_reg;
1838
1839 pci_enable_pcie_error_reporting(pdev);
1840
1841 pci_set_master(pdev);
1842 pci_save_state(pdev);
1843
1844 err = -ENOMEM;
1845 netdev = alloc_etherdev_mq(sizeof(struct igb_adapter),
1846 IGB_ABS_MAX_TX_QUEUES);
1847 if (!netdev)
1848 goto err_alloc_etherdev;
1849
1850 SET_NETDEV_DEV(netdev, &pdev->dev);
1851
1852 pci_set_drvdata(pdev, netdev);
1853 adapter = netdev_priv(netdev);
1854 adapter->netdev = netdev;
1855 adapter->pdev = pdev;
1856 hw = &adapter->hw;
1857 hw->back = adapter;
1858 adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE;
1859
1860 mmio_start = pci_resource_start(pdev, 0);
1861 mmio_len = pci_resource_len(pdev, 0);
1862
1863 err = -EIO;
1864 hw->hw_addr = ioremap(mmio_start, mmio_len);
1865 if (!hw->hw_addr)
1866 goto err_ioremap;
1867
1868 netdev->netdev_ops = &igb_netdev_ops;
1869 igb_set_ethtool_ops(netdev);
1870 netdev->watchdog_timeo = 5 * HZ;
1871
1872 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1873
1874 netdev->mem_start = mmio_start;
1875 netdev->mem_end = mmio_start + mmio_len;
1876
1877 /* PCI config space info */
1878 hw->vendor_id = pdev->vendor;
1879 hw->device_id = pdev->device;
1880 hw->revision_id = pdev->revision;
1881 hw->subsystem_vendor_id = pdev->subsystem_vendor;
1882 hw->subsystem_device_id = pdev->subsystem_device;
1883
1884 /* Copy the default MAC, PHY and NVM function pointers */
1885 memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
1886 memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
1887 memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
1888 /* Initialize skew-specific constants */
1889 err = ei->get_invariants(hw);
1890 if (err)
1891 goto err_sw_init;
1892
1893 /* setup the private structure */
1894 err = igb_sw_init(adapter);
1895 if (err)
1896 goto err_sw_init;
1897
1898 igb_get_bus_info_pcie(hw);
1899
1900 hw->phy.autoneg_wait_to_complete = false;
1901
1902 /* Copper options */
1903 if (hw->phy.media_type == e1000_media_type_copper) {
1904 hw->phy.mdix = AUTO_ALL_MODES;
1905 hw->phy.disable_polarity_correction = false;
1906 hw->phy.ms_type = e1000_ms_hw_default;
1907 }
1908
1909 if (igb_check_reset_block(hw))
1910 dev_info(&pdev->dev,
1911 "PHY reset is blocked due to SOL/IDER session.\n");
1912
1913 netdev->features = NETIF_F_SG |
1914 NETIF_F_IP_CSUM |
1915 NETIF_F_HW_VLAN_TX |
1916 NETIF_F_HW_VLAN_RX |
1917 NETIF_F_HW_VLAN_FILTER;
1918
1919 netdev->features |= NETIF_F_IPV6_CSUM;
1920 netdev->features |= NETIF_F_TSO;
1921 netdev->features |= NETIF_F_TSO6;
1922 netdev->features |= NETIF_F_GRO;
1923
1924 netdev->vlan_features |= NETIF_F_TSO;
1925 netdev->vlan_features |= NETIF_F_TSO6;
1926 netdev->vlan_features |= NETIF_F_IP_CSUM;
1927 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
1928 netdev->vlan_features |= NETIF_F_SG;
1929
1930 if (pci_using_dac) {
1931 netdev->features |= NETIF_F_HIGHDMA;
1932 netdev->vlan_features |= NETIF_F_HIGHDMA;
1933 }
1934
1935 if (hw->mac.type >= e1000_82576)
1936 netdev->features |= NETIF_F_SCTP_CSUM;
1937
1938 adapter->en_mng_pt = igb_enable_mng_pass_thru(hw);
1939
1940 /* before reading the NVM, reset the controller to put the device in a
1941 * known good starting state */
1942 hw->mac.ops.reset_hw(hw);
1943
1944 /* make sure the NVM is good */
1945 if (hw->nvm.ops.validate(hw) < 0) {
1946 dev_err(&pdev->dev, "The NVM Checksum Is Not Valid\n");
1947 err = -EIO;
1948 goto err_eeprom;
1949 }
1950
1951 /* copy the MAC address out of the NVM */
1952 if (hw->mac.ops.read_mac_addr(hw))
1953 dev_err(&pdev->dev, "NVM Read Error\n");
1954
1955 memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len);
1956 memcpy(netdev->perm_addr, hw->mac.addr, netdev->addr_len);
1957
1958 if (!is_valid_ether_addr(netdev->perm_addr)) {
1959 dev_err(&pdev->dev, "Invalid MAC Address\n");
1960 err = -EIO;
1961 goto err_eeprom;
1962 }
1963
1964 setup_timer(&adapter->watchdog_timer, igb_watchdog,
1965 (unsigned long) adapter);
1966 setup_timer(&adapter->phy_info_timer, igb_update_phy_info,
1967 (unsigned long) adapter);
1968
1969 INIT_WORK(&adapter->reset_task, igb_reset_task);
1970 INIT_WORK(&adapter->watchdog_task, igb_watchdog_task);
1971
1972 /* Initialize link properties that are user-changeable */
1973 adapter->fc_autoneg = true;
1974 hw->mac.autoneg = true;
1975 hw->phy.autoneg_advertised = 0x2f;
1976
1977 hw->fc.requested_mode = e1000_fc_default;
1978 hw->fc.current_mode = e1000_fc_default;
1979
1980 igb_validate_mdi_setting(hw);
1981
1982 /* Initial Wake on LAN setting If APM wake is enabled in the EEPROM,
1983 * enable the ACPI Magic Packet filter
1984 */
1985
1986 if (hw->bus.func == 0)
1987 hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1988 else if (hw->mac.type == e1000_82580)
1989 hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_A +
1990 NVM_82580_LAN_FUNC_OFFSET(hw->bus.func), 1,
1991 &eeprom_data);
1992 else if (hw->bus.func == 1)
1993 hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1994
1995 if (eeprom_data & eeprom_apme_mask)
1996 adapter->eeprom_wol |= E1000_WUFC_MAG;
1997
1998 /* now that we have the eeprom settings, apply the special cases where
1999 * the eeprom may be wrong or the board simply won't support wake on
2000 * lan on a particular port */
2001 switch (pdev->device) {
2002 case E1000_DEV_ID_82575GB_QUAD_COPPER:
2003 adapter->eeprom_wol = 0;
2004 break;
2005 case E1000_DEV_ID_82575EB_FIBER_SERDES:
2006 case E1000_DEV_ID_82576_FIBER:
2007 case E1000_DEV_ID_82576_SERDES:
2008 /* Wake events only supported on port A for dual fiber
2009 * regardless of eeprom setting */
2010 if (rd32(E1000_STATUS) & E1000_STATUS_FUNC_1)
2011 adapter->eeprom_wol = 0;
2012 break;
2013 case E1000_DEV_ID_82576_QUAD_COPPER:
2014 case E1000_DEV_ID_82576_QUAD_COPPER_ET2:
2015 /* if quad port adapter, disable WoL on all but port A */
2016 if (global_quad_port_a != 0)
2017 adapter->eeprom_wol = 0;
2018 else
2019 adapter->flags |= IGB_FLAG_QUAD_PORT_A;
2020 /* Reset for multiple quad port adapters */
2021 if (++global_quad_port_a == 4)
2022 global_quad_port_a = 0;
2023 break;
2024 }
2025
2026 /* initialize the wol settings based on the eeprom settings */
2027 adapter->wol = adapter->eeprom_wol;
2028 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
2029
2030 /* reset the hardware with the new settings */
2031 igb_reset(adapter);
2032
2033 /* let the f/w know that the h/w is now under the control of the
2034 * driver. */
2035 igb_get_hw_control(adapter);
2036
2037 strcpy(netdev->name, "eth%d");
2038 err = register_netdev(netdev);
2039 if (err)
2040 goto err_register;
2041
2042 /* carrier off reporting is important to ethtool even BEFORE open */
2043 netif_carrier_off(netdev);
2044
2045 #ifdef CONFIG_IGB_DCA
2046 if (dca_add_requester(&pdev->dev) == 0) {
2047 adapter->flags |= IGB_FLAG_DCA_ENABLED;
2048 dev_info(&pdev->dev, "DCA enabled\n");
2049 igb_setup_dca(adapter);
2050 }
2051
2052 #endif
2053 /* do hw tstamp init after resetting */
2054 igb_init_hw_timer(adapter);
2055
2056 dev_info(&pdev->dev, "Intel(R) Gigabit Ethernet Network Connection\n");
2057 /* print bus type/speed/width info */
2058 dev_info(&pdev->dev, "%s: (PCIe:%s:%s) %pM\n",
2059 netdev->name,
2060 ((hw->bus.speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
2061 (hw->bus.speed == e1000_bus_speed_5000) ? "5.0Gb/s" :
2062 "unknown"),
2063 ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
2064 (hw->bus.width == e1000_bus_width_pcie_x2) ? "Width x2" :
2065 (hw->bus.width == e1000_bus_width_pcie_x1) ? "Width x1" :
2066 "unknown"),
2067 netdev->dev_addr);
2068
2069 ret_val = igb_read_part_string(hw, part_str, E1000_PBANUM_LENGTH);
2070 if (ret_val)
2071 strcpy(part_str, "Unknown");
2072 dev_info(&pdev->dev, "%s: PBA No: %s\n", netdev->name, part_str);
2073 dev_info(&pdev->dev,
2074 "Using %s interrupts. %d rx queue(s), %d tx queue(s)\n",
2075 adapter->msix_entries ? "MSI-X" :
2076 (adapter->flags & IGB_FLAG_HAS_MSI) ? "MSI" : "legacy",
2077 adapter->num_rx_queues, adapter->num_tx_queues);
2078 switch (hw->mac.type) {
2079 case e1000_i350:
2080 igb_set_eee_i350(hw);
2081 break;
2082 default:
2083 break;
2084 }
2085 return 0;
2086
2087 err_register:
2088 igb_release_hw_control(adapter);
2089 err_eeprom:
2090 if (!igb_check_reset_block(hw))
2091 igb_reset_phy(hw);
2092
2093 if (hw->flash_address)
2094 iounmap(hw->flash_address);
2095 err_sw_init:
2096 igb_clear_interrupt_scheme(adapter);
2097 iounmap(hw->hw_addr);
2098 err_ioremap:
2099 free_netdev(netdev);
2100 err_alloc_etherdev:
2101 pci_release_selected_regions(pdev,
2102 pci_select_bars(pdev, IORESOURCE_MEM));
2103 err_pci_reg:
2104 err_dma:
2105 pci_disable_device(pdev);
2106 return err;
2107 }
2108
2109 /**
2110 * igb_remove - Device Removal Routine
2111 * @pdev: PCI device information struct
2112 *
2113 * igb_remove is called by the PCI subsystem to alert the driver
2114 * that it should release a PCI device. The could be caused by a
2115 * Hot-Plug event, or because the driver is going to be removed from
2116 * memory.
2117 **/
2118 static void __devexit igb_remove(struct pci_dev *pdev)
2119 {
2120 struct net_device *netdev = pci_get_drvdata(pdev);
2121 struct igb_adapter *adapter = netdev_priv(netdev);
2122 struct e1000_hw *hw = &adapter->hw;
2123
2124 /*
2125 * The watchdog timer may be rescheduled, so explicitly
2126 * disable watchdog from being rescheduled.
2127 */
2128 set_bit(__IGB_DOWN, &adapter->state);
2129 del_timer_sync(&adapter->watchdog_timer);
2130 del_timer_sync(&adapter->phy_info_timer);
2131
2132 cancel_work_sync(&adapter->reset_task);
2133 cancel_work_sync(&adapter->watchdog_task);
2134
2135 #ifdef CONFIG_IGB_DCA
2136 if (adapter->flags & IGB_FLAG_DCA_ENABLED) {
2137 dev_info(&pdev->dev, "DCA disabled\n");
2138 dca_remove_requester(&pdev->dev);
2139 adapter->flags &= ~IGB_FLAG_DCA_ENABLED;
2140 wr32(E1000_DCA_CTRL, E1000_DCA_CTRL_DCA_MODE_DISABLE);
2141 }
2142 #endif
2143
2144 /* Release control of h/w to f/w. If f/w is AMT enabled, this
2145 * would have already happened in close and is redundant. */
2146 igb_release_hw_control(adapter);
2147
2148 unregister_netdev(netdev);
2149
2150 igb_clear_interrupt_scheme(adapter);
2151
2152 #ifdef CONFIG_PCI_IOV
2153 /* reclaim resources allocated to VFs */
2154 if (adapter->vf_data) {
2155 /* disable iov and allow time for transactions to clear */
2156 pci_disable_sriov(pdev);
2157 msleep(500);
2158
2159 kfree(adapter->vf_data);
2160 adapter->vf_data = NULL;
2161 wr32(E1000_IOVCTL, E1000_IOVCTL_REUSE_VFQ);
2162 msleep(100);
2163 dev_info(&pdev->dev, "IOV Disabled\n");
2164 }
2165 #endif
2166
2167 iounmap(hw->hw_addr);
2168 if (hw->flash_address)
2169 iounmap(hw->flash_address);
2170 pci_release_selected_regions(pdev,
2171 pci_select_bars(pdev, IORESOURCE_MEM));
2172
2173 free_netdev(netdev);
2174
2175 pci_disable_pcie_error_reporting(pdev);
2176
2177 pci_disable_device(pdev);
2178 }
2179
2180 /**
2181 * igb_probe_vfs - Initialize vf data storage and add VFs to pci config space
2182 * @adapter: board private structure to initialize
2183 *
2184 * This function initializes the vf specific data storage and then attempts to
2185 * allocate the VFs. The reason for ordering it this way is because it is much
2186 * mor expensive time wise to disable SR-IOV than it is to allocate and free
2187 * the memory for the VFs.
2188 **/
2189 static void __devinit igb_probe_vfs(struct igb_adapter * adapter)
2190 {
2191 #ifdef CONFIG_PCI_IOV
2192 struct pci_dev *pdev = adapter->pdev;
2193
2194 if (adapter->vfs_allocated_count) {
2195 adapter->vf_data = kcalloc(adapter->vfs_allocated_count,
2196 sizeof(struct vf_data_storage),
2197 GFP_KERNEL);
2198 /* if allocation failed then we do not support SR-IOV */
2199 if (!adapter->vf_data) {
2200 adapter->vfs_allocated_count = 0;
2201 dev_err(&pdev->dev, "Unable to allocate memory for VF "
2202 "Data Storage\n");
2203 }
2204 }
2205
2206 if (pci_enable_sriov(pdev, adapter->vfs_allocated_count)) {
2207 kfree(adapter->vf_data);
2208 adapter->vf_data = NULL;
2209 #endif /* CONFIG_PCI_IOV */
2210 adapter->vfs_allocated_count = 0;
2211 #ifdef CONFIG_PCI_IOV
2212 } else {
2213 unsigned char mac_addr[ETH_ALEN];
2214 int i;
2215 dev_info(&pdev->dev, "%d vfs allocated\n",
2216 adapter->vfs_allocated_count);
2217 for (i = 0; i < adapter->vfs_allocated_count; i++) {
2218 random_ether_addr(mac_addr);
2219 igb_set_vf_mac(adapter, i, mac_addr);
2220 }
2221 /* DMA Coalescing is not supported in IOV mode. */
2222 if (adapter->flags & IGB_FLAG_DMAC)
2223 adapter->flags &= ~IGB_FLAG_DMAC;
2224 }
2225 #endif /* CONFIG_PCI_IOV */
2226 }
2227
2228
2229 /**
2230 * igb_init_hw_timer - Initialize hardware timer used with IEEE 1588 timestamp
2231 * @adapter: board private structure to initialize
2232 *
2233 * igb_init_hw_timer initializes the function pointer and values for the hw
2234 * timer found in hardware.
2235 **/
2236 static void igb_init_hw_timer(struct igb_adapter *adapter)
2237 {
2238 struct e1000_hw *hw = &adapter->hw;
2239
2240 switch (hw->mac.type) {
2241 case e1000_i350:
2242 case e1000_82580:
2243 memset(&adapter->cycles, 0, sizeof(adapter->cycles));
2244 adapter->cycles.read = igb_read_clock;
2245 adapter->cycles.mask = CLOCKSOURCE_MASK(64);
2246 adapter->cycles.mult = 1;
2247 /*
2248 * The 82580 timesync updates the system timer every 8ns by 8ns
2249 * and the value cannot be shifted. Instead we need to shift
2250 * the registers to generate a 64bit timer value. As a result
2251 * SYSTIMR/L/H, TXSTMPL/H, RXSTMPL/H all have to be shifted by
2252 * 24 in order to generate a larger value for synchronization.
2253 */
2254 adapter->cycles.shift = IGB_82580_TSYNC_SHIFT;
2255 /* disable system timer temporarily by setting bit 31 */
2256 wr32(E1000_TSAUXC, 0x80000000);
2257 wrfl();
2258
2259 /* Set registers so that rollover occurs soon to test this. */
2260 wr32(E1000_SYSTIMR, 0x00000000);
2261 wr32(E1000_SYSTIML, 0x80000000);
2262 wr32(E1000_SYSTIMH, 0x000000FF);
2263 wrfl();
2264
2265 /* enable system timer by clearing bit 31 */
2266 wr32(E1000_TSAUXC, 0x0);
2267 wrfl();
2268
2269 timecounter_init(&adapter->clock,
2270 &adapter->cycles,
2271 ktime_to_ns(ktime_get_real()));
2272 /*
2273 * Synchronize our NIC clock against system wall clock. NIC
2274 * time stamp reading requires ~3us per sample, each sample
2275 * was pretty stable even under load => only require 10
2276 * samples for each offset comparison.
2277 */
2278 memset(&adapter->compare, 0, sizeof(adapter->compare));
2279 adapter->compare.source = &adapter->clock;
2280 adapter->compare.target = ktime_get_real;
2281 adapter->compare.num_samples = 10;
2282 timecompare_update(&adapter->compare, 0);
2283 break;
2284 case e1000_82576:
2285 /*
2286 * Initialize hardware timer: we keep it running just in case
2287 * that some program needs it later on.
2288 */
2289 memset(&adapter->cycles, 0, sizeof(adapter->cycles));
2290 adapter->cycles.read = igb_read_clock;
2291 adapter->cycles.mask = CLOCKSOURCE_MASK(64);
2292 adapter->cycles.mult = 1;
2293 /**
2294 * Scale the NIC clock cycle by a large factor so that
2295 * relatively small clock corrections can be added or
2296 * subtracted at each clock tick. The drawbacks of a large
2297 * factor are a) that the clock register overflows more quickly
2298 * (not such a big deal) and b) that the increment per tick has
2299 * to fit into 24 bits. As a result we need to use a shift of
2300 * 19 so we can fit a value of 16 into the TIMINCA register.
2301 */
2302 adapter->cycles.shift = IGB_82576_TSYNC_SHIFT;
2303 wr32(E1000_TIMINCA,
2304 (1 << E1000_TIMINCA_16NS_SHIFT) |
2305 (16 << IGB_82576_TSYNC_SHIFT));
2306
2307 /* Set registers so that rollover occurs soon to test this. */
2308 wr32(E1000_SYSTIML, 0x00000000);
2309 wr32(E1000_SYSTIMH, 0xFF800000);
2310 wrfl();
2311
2312 timecounter_init(&adapter->clock,
2313 &adapter->cycles,
2314 ktime_to_ns(ktime_get_real()));
2315 /*
2316 * Synchronize our NIC clock against system wall clock. NIC
2317 * time stamp reading requires ~3us per sample, each sample
2318 * was pretty stable even under load => only require 10
2319 * samples for each offset comparison.
2320 */
2321 memset(&adapter->compare, 0, sizeof(adapter->compare));
2322 adapter->compare.source = &adapter->clock;
2323 adapter->compare.target = ktime_get_real;
2324 adapter->compare.num_samples = 10;
2325 timecompare_update(&adapter->compare, 0);
2326 break;
2327 case e1000_82575:
2328 /* 82575 does not support timesync */
2329 default:
2330 break;
2331 }
2332
2333 }
2334
2335 /**
2336 * igb_sw_init - Initialize general software structures (struct igb_adapter)
2337 * @adapter: board private structure to initialize
2338 *
2339 * igb_sw_init initializes the Adapter private data structure.
2340 * Fields are initialized based on PCI device information and
2341 * OS network device settings (MTU size).
2342 **/
2343 static int __devinit igb_sw_init(struct igb_adapter *adapter)
2344 {
2345 struct e1000_hw *hw = &adapter->hw;
2346 struct net_device *netdev = adapter->netdev;
2347 struct pci_dev *pdev = adapter->pdev;
2348
2349 pci_read_config_word(pdev, PCI_COMMAND, &hw->bus.pci_cmd_word);
2350
2351 adapter->tx_ring_count = IGB_DEFAULT_TXD;
2352 adapter->rx_ring_count = IGB_DEFAULT_RXD;
2353 adapter->rx_itr_setting = IGB_DEFAULT_ITR;
2354 adapter->tx_itr_setting = IGB_DEFAULT_ITR;
2355
2356 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2357 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
2358
2359 spin_lock_init(&adapter->stats64_lock);
2360 #ifdef CONFIG_PCI_IOV
2361 switch (hw->mac.type) {
2362 case e1000_82576:
2363 case e1000_i350:
2364 if (max_vfs > 7) {
2365 dev_warn(&pdev->dev,
2366 "Maximum of 7 VFs per PF, using max\n");
2367 adapter->vfs_allocated_count = 7;
2368 } else
2369 adapter->vfs_allocated_count = max_vfs;
2370 break;
2371 default:
2372 break;
2373 }
2374 #endif /* CONFIG_PCI_IOV */
2375 adapter->rss_queues = min_t(u32, IGB_MAX_RX_QUEUES, num_online_cpus());
2376 /* i350 cannot do RSS and SR-IOV at the same time */
2377 if (hw->mac.type == e1000_i350 && adapter->vfs_allocated_count)
2378 adapter->rss_queues = 1;
2379
2380 /*
2381 * if rss_queues > 4 or vfs are going to be allocated with rss_queues
2382 * then we should combine the queues into a queue pair in order to
2383 * conserve interrupts due to limited supply
2384 */
2385 if ((adapter->rss_queues > 4) ||
2386 ((adapter->rss_queues > 1) && (adapter->vfs_allocated_count > 6)))
2387 adapter->flags |= IGB_FLAG_QUEUE_PAIRS;
2388
2389 /* This call may decrease the number of queues */
2390 if (igb_init_interrupt_scheme(adapter)) {
2391 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
2392 return -ENOMEM;
2393 }
2394
2395 igb_probe_vfs(adapter);
2396
2397 /* Explicitly disable IRQ since the NIC can be in any state. */
2398 igb_irq_disable(adapter);
2399
2400 if (hw->mac.type == e1000_i350)
2401 adapter->flags &= ~IGB_FLAG_DMAC;
2402
2403 set_bit(__IGB_DOWN, &adapter->state);
2404 return 0;
2405 }
2406
2407 /**
2408 * igb_open - Called when a network interface is made active
2409 * @netdev: network interface device structure
2410 *
2411 * Returns 0 on success, negative value on failure
2412 *
2413 * The open entry point is called when a network interface is made
2414 * active by the system (IFF_UP). At this point all resources needed
2415 * for transmit and receive operations are allocated, the interrupt
2416 * handler is registered with the OS, the watchdog timer is started,
2417 * and the stack is notified that the interface is ready.
2418 **/
2419 static int igb_open(struct net_device *netdev)
2420 {
2421 struct igb_adapter *adapter = netdev_priv(netdev);
2422 struct e1000_hw *hw = &adapter->hw;
2423 int err;
2424 int i;
2425
2426 /* disallow open during test */
2427 if (test_bit(__IGB_TESTING, &adapter->state))
2428 return -EBUSY;
2429
2430 netif_carrier_off(netdev);
2431
2432 /* allocate transmit descriptors */
2433 err = igb_setup_all_tx_resources(adapter);
2434 if (err)
2435 goto err_setup_tx;
2436
2437 /* allocate receive descriptors */
2438 err = igb_setup_all_rx_resources(adapter);
2439 if (err)
2440 goto err_setup_rx;
2441
2442 igb_power_up_link(adapter);
2443
2444 /* before we allocate an interrupt, we must be ready to handle it.
2445 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
2446 * as soon as we call pci_request_irq, so we have to setup our
2447 * clean_rx handler before we do so. */
2448 igb_configure(adapter);
2449
2450 err = igb_request_irq(adapter);
2451 if (err)
2452 goto err_req_irq;
2453
2454 /* From here on the code is the same as igb_up() */
2455 clear_bit(__IGB_DOWN, &adapter->state);
2456
2457 for (i = 0; i < adapter->num_q_vectors; i++) {
2458 struct igb_q_vector *q_vector = adapter->q_vector[i];
2459 napi_enable(&q_vector->napi);
2460 }
2461
2462 /* Clear any pending interrupts. */
2463 rd32(E1000_ICR);
2464
2465 igb_irq_enable(adapter);
2466
2467 /* notify VFs that reset has been completed */
2468 if (adapter->vfs_allocated_count) {
2469 u32 reg_data = rd32(E1000_CTRL_EXT);
2470 reg_data |= E1000_CTRL_EXT_PFRSTD;
2471 wr32(E1000_CTRL_EXT, reg_data);
2472 }
2473
2474 netif_tx_start_all_queues(netdev);
2475
2476 /* start the watchdog. */
2477 hw->mac.get_link_status = 1;
2478 schedule_work(&adapter->watchdog_task);
2479
2480 return 0;
2481
2482 err_req_irq:
2483 igb_release_hw_control(adapter);
2484 igb_power_down_link(adapter);
2485 igb_free_all_rx_resources(adapter);
2486 err_setup_rx:
2487 igb_free_all_tx_resources(adapter);
2488 err_setup_tx:
2489 igb_reset(adapter);
2490
2491 return err;
2492 }
2493
2494 /**
2495 * igb_close - Disables a network interface
2496 * @netdev: network interface device structure
2497 *
2498 * Returns 0, this is not allowed to fail
2499 *
2500 * The close entry point is called when an interface is de-activated
2501 * by the OS. The hardware is still under the driver's control, but
2502 * needs to be disabled. A global MAC reset is issued to stop the
2503 * hardware, and all transmit and receive resources are freed.
2504 **/
2505 static int igb_close(struct net_device *netdev)
2506 {
2507 struct igb_adapter *adapter = netdev_priv(netdev);
2508
2509 WARN_ON(test_bit(__IGB_RESETTING, &adapter->state));
2510 igb_down(adapter);
2511
2512 igb_free_irq(adapter);
2513
2514 igb_free_all_tx_resources(adapter);
2515 igb_free_all_rx_resources(adapter);
2516
2517 return 0;
2518 }
2519
2520 /**
2521 * igb_setup_tx_resources - allocate Tx resources (Descriptors)
2522 * @tx_ring: tx descriptor ring (for a specific queue) to setup
2523 *
2524 * Return 0 on success, negative on failure
2525 **/
2526 int igb_setup_tx_resources(struct igb_ring *tx_ring)
2527 {
2528 struct device *dev = tx_ring->dev;
2529 int size;
2530
2531 size = sizeof(struct igb_buffer) * tx_ring->count;
2532 tx_ring->buffer_info = vzalloc(size);
2533 if (!tx_ring->buffer_info)
2534 goto err;
2535
2536 /* round up to nearest 4K */
2537 tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
2538 tx_ring->size = ALIGN(tx_ring->size, 4096);
2539
2540 tx_ring->desc = dma_alloc_coherent(dev,
2541 tx_ring->size,
2542 &tx_ring->dma,
2543 GFP_KERNEL);
2544
2545 if (!tx_ring->desc)
2546 goto err;
2547
2548 tx_ring->next_to_use = 0;
2549 tx_ring->next_to_clean = 0;
2550 return 0;
2551
2552 err:
2553 vfree(tx_ring->buffer_info);
2554 dev_err(dev,
2555 "Unable to allocate memory for the transmit descriptor ring\n");
2556 return -ENOMEM;
2557 }
2558
2559 /**
2560 * igb_setup_all_tx_resources - wrapper to allocate Tx resources
2561 * (Descriptors) for all queues
2562 * @adapter: board private structure
2563 *
2564 * Return 0 on success, negative on failure
2565 **/
2566 static int igb_setup_all_tx_resources(struct igb_adapter *adapter)
2567 {
2568 struct pci_dev *pdev = adapter->pdev;
2569 int i, err = 0;
2570
2571 for (i = 0; i < adapter->num_tx_queues; i++) {
2572 err = igb_setup_tx_resources(adapter->tx_ring[i]);
2573 if (err) {
2574 dev_err(&pdev->dev,
2575 "Allocation for Tx Queue %u failed\n", i);
2576 for (i--; i >= 0; i--)
2577 igb_free_tx_resources(adapter->tx_ring[i]);
2578 break;
2579 }
2580 }
2581
2582 for (i = 0; i < IGB_ABS_MAX_TX_QUEUES; i++) {
2583 int r_idx = i % adapter->num_tx_queues;
2584 adapter->multi_tx_table[i] = adapter->tx_ring[r_idx];
2585 }
2586 return err;
2587 }
2588
2589 /**
2590 * igb_setup_tctl - configure the transmit control registers
2591 * @adapter: Board private structure
2592 **/
2593 void igb_setup_tctl(struct igb_adapter *adapter)
2594 {
2595 struct e1000_hw *hw = &adapter->hw;
2596 u32 tctl;
2597
2598 /* disable queue 0 which is enabled by default on 82575 and 82576 */
2599 wr32(E1000_TXDCTL(0), 0);
2600
2601 /* Program the Transmit Control Register */
2602 tctl = rd32(E1000_TCTL);
2603 tctl &= ~E1000_TCTL_CT;
2604 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
2605 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
2606
2607 igb_config_collision_dist(hw);
2608
2609 /* Enable transmits */
2610 tctl |= E1000_TCTL_EN;
2611
2612 wr32(E1000_TCTL, tctl);
2613 }
2614
2615 /**
2616 * igb_configure_tx_ring - Configure transmit ring after Reset
2617 * @adapter: board private structure
2618 * @ring: tx ring to configure
2619 *
2620 * Configure a transmit ring after a reset.
2621 **/
2622 void igb_configure_tx_ring(struct igb_adapter *adapter,
2623 struct igb_ring *ring)
2624 {
2625 struct e1000_hw *hw = &adapter->hw;
2626 u32 txdctl;
2627 u64 tdba = ring->dma;
2628 int reg_idx = ring->reg_idx;
2629
2630 /* disable the queue */
2631 txdctl = rd32(E1000_TXDCTL(reg_idx));
2632 wr32(E1000_TXDCTL(reg_idx),
2633 txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
2634 wrfl();
2635 mdelay(10);
2636
2637 wr32(E1000_TDLEN(reg_idx),
2638 ring->count * sizeof(union e1000_adv_tx_desc));
2639 wr32(E1000_TDBAL(reg_idx),
2640 tdba & 0x00000000ffffffffULL);
2641 wr32(E1000_TDBAH(reg_idx), tdba >> 32);
2642
2643 ring->head = hw->hw_addr + E1000_TDH(reg_idx);
2644 ring->tail = hw->hw_addr + E1000_TDT(reg_idx);
2645 writel(0, ring->head);
2646 writel(0, ring->tail);
2647
2648 txdctl |= IGB_TX_PTHRESH;
2649 txdctl |= IGB_TX_HTHRESH << 8;
2650 txdctl |= IGB_TX_WTHRESH << 16;
2651
2652 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
2653 wr32(E1000_TXDCTL(reg_idx), txdctl);
2654 }
2655
2656 /**
2657 * igb_configure_tx - Configure transmit Unit after Reset
2658 * @adapter: board private structure
2659 *
2660 * Configure the Tx unit of the MAC after a reset.
2661 **/
2662 static void igb_configure_tx(struct igb_adapter *adapter)
2663 {
2664 int i;
2665
2666 for (i = 0; i < adapter->num_tx_queues; i++)
2667 igb_configure_tx_ring(adapter, adapter->tx_ring[i]);
2668 }
2669
2670 /**
2671 * igb_setup_rx_resources - allocate Rx resources (Descriptors)
2672 * @rx_ring: rx descriptor ring (for a specific queue) to setup
2673 *
2674 * Returns 0 on success, negative on failure
2675 **/
2676 int igb_setup_rx_resources(struct igb_ring *rx_ring)
2677 {
2678 struct device *dev = rx_ring->dev;
2679 int size, desc_len;
2680
2681 size = sizeof(struct igb_buffer) * rx_ring->count;
2682 rx_ring->buffer_info = vzalloc(size);
2683 if (!rx_ring->buffer_info)
2684 goto err;
2685
2686 desc_len = sizeof(union e1000_adv_rx_desc);
2687
2688 /* Round up to nearest 4K */
2689 rx_ring->size = rx_ring->count * desc_len;
2690 rx_ring->size = ALIGN(rx_ring->size, 4096);
2691
2692 rx_ring->desc = dma_alloc_coherent(dev,
2693 rx_ring->size,
2694 &rx_ring->dma,
2695 GFP_KERNEL);
2696
2697 if (!rx_ring->desc)
2698 goto err;
2699
2700 rx_ring->next_to_clean = 0;
2701 rx_ring->next_to_use = 0;
2702
2703 return 0;
2704
2705 err:
2706 vfree(rx_ring->buffer_info);
2707 rx_ring->buffer_info = NULL;
2708 dev_err(dev, "Unable to allocate memory for the receive descriptor"
2709 " ring\n");
2710 return -ENOMEM;
2711 }
2712
2713 /**
2714 * igb_setup_all_rx_resources - wrapper to allocate Rx resources
2715 * (Descriptors) for all queues
2716 * @adapter: board private structure
2717 *
2718 * Return 0 on success, negative on failure
2719 **/
2720 static int igb_setup_all_rx_resources(struct igb_adapter *adapter)
2721 {
2722 struct pci_dev *pdev = adapter->pdev;
2723 int i, err = 0;
2724
2725 for (i = 0; i < adapter->num_rx_queues; i++) {
2726 err = igb_setup_rx_resources(adapter->rx_ring[i]);
2727 if (err) {
2728 dev_err(&pdev->dev,
2729 "Allocation for Rx Queue %u failed\n", i);
2730 for (i--; i >= 0; i--)
2731 igb_free_rx_resources(adapter->rx_ring[i]);
2732 break;
2733 }
2734 }
2735
2736 return err;
2737 }
2738
2739 /**
2740 * igb_setup_mrqc - configure the multiple receive queue control registers
2741 * @adapter: Board private structure
2742 **/
2743 static void igb_setup_mrqc(struct igb_adapter *adapter)
2744 {
2745 struct e1000_hw *hw = &adapter->hw;
2746 u32 mrqc, rxcsum;
2747 u32 j, num_rx_queues, shift = 0, shift2 = 0;
2748 union e1000_reta {
2749 u32 dword;
2750 u8 bytes[4];
2751 } reta;
2752 static const u8 rsshash[40] = {
2753 0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2, 0x41, 0x67,
2754 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0, 0xd0, 0xca, 0x2b, 0xcb,
2755 0xae, 0x7b, 0x30, 0xb4, 0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30,
2756 0xf2, 0x0c, 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa };
2757
2758 /* Fill out hash function seeds */
2759 for (j = 0; j < 10; j++) {
2760 u32 rsskey = rsshash[(j * 4)];
2761 rsskey |= rsshash[(j * 4) + 1] << 8;
2762 rsskey |= rsshash[(j * 4) + 2] << 16;
2763 rsskey |= rsshash[(j * 4) + 3] << 24;
2764 array_wr32(E1000_RSSRK(0), j, rsskey);
2765 }
2766
2767 num_rx_queues = adapter->rss_queues;
2768
2769 if (adapter->vfs_allocated_count) {
2770 /* 82575 and 82576 supports 2 RSS queues for VMDq */
2771 switch (hw->mac.type) {
2772 case e1000_i350:
2773 case e1000_82580:
2774 num_rx_queues = 1;
2775 shift = 0;
2776 break;
2777 case e1000_82576:
2778 shift = 3;
2779 num_rx_queues = 2;
2780 break;
2781 case e1000_82575:
2782 shift = 2;
2783 shift2 = 6;
2784 default:
2785 break;
2786 }
2787 } else {
2788 if (hw->mac.type == e1000_82575)
2789 shift = 6;
2790 }
2791
2792 for (j = 0; j < (32 * 4); j++) {
2793 reta.bytes[j & 3] = (j % num_rx_queues) << shift;
2794 if (shift2)
2795 reta.bytes[j & 3] |= num_rx_queues << shift2;
2796 if ((j & 3) == 3)
2797 wr32(E1000_RETA(j >> 2), reta.dword);
2798 }
2799
2800 /*
2801 * Disable raw packet checksumming so that RSS hash is placed in
2802 * descriptor on writeback. No need to enable TCP/UDP/IP checksum
2803 * offloads as they are enabled by default
2804 */
2805 rxcsum = rd32(E1000_RXCSUM);
2806 rxcsum |= E1000_RXCSUM_PCSD;
2807
2808 if (adapter->hw.mac.type >= e1000_82576)
2809 /* Enable Receive Checksum Offload for SCTP */
2810 rxcsum |= E1000_RXCSUM_CRCOFL;
2811
2812 /* Don't need to set TUOFL or IPOFL, they default to 1 */
2813 wr32(E1000_RXCSUM, rxcsum);
2814
2815 /* If VMDq is enabled then we set the appropriate mode for that, else
2816 * we default to RSS so that an RSS hash is calculated per packet even
2817 * if we are only using one queue */
2818 if (adapter->vfs_allocated_count) {
2819 if (hw->mac.type > e1000_82575) {
2820 /* Set the default pool for the PF's first queue */
2821 u32 vtctl = rd32(E1000_VT_CTL);
2822 vtctl &= ~(E1000_VT_CTL_DEFAULT_POOL_MASK |
2823 E1000_VT_CTL_DISABLE_DEF_POOL);
2824 vtctl |= adapter->vfs_allocated_count <<
2825 E1000_VT_CTL_DEFAULT_POOL_SHIFT;
2826 wr32(E1000_VT_CTL, vtctl);
2827 }
2828 if (adapter->rss_queues > 1)
2829 mrqc = E1000_MRQC_ENABLE_VMDQ_RSS_2Q;
2830 else
2831 mrqc = E1000_MRQC_ENABLE_VMDQ;
2832 } else {
2833 mrqc = E1000_MRQC_ENABLE_RSS_4Q;
2834 }
2835 igb_vmm_control(adapter);
2836
2837 /*
2838 * Generate RSS hash based on TCP port numbers and/or
2839 * IPv4/v6 src and dst addresses since UDP cannot be
2840 * hashed reliably due to IP fragmentation
2841 */
2842 mrqc |= E1000_MRQC_RSS_FIELD_IPV4 |
2843 E1000_MRQC_RSS_FIELD_IPV4_TCP |
2844 E1000_MRQC_RSS_FIELD_IPV6 |
2845 E1000_MRQC_RSS_FIELD_IPV6_TCP |
2846 E1000_MRQC_RSS_FIELD_IPV6_TCP_EX;
2847
2848 wr32(E1000_MRQC, mrqc);
2849 }
2850
2851 /**
2852 * igb_setup_rctl - configure the receive control registers
2853 * @adapter: Board private structure
2854 **/
2855 void igb_setup_rctl(struct igb_adapter *adapter)
2856 {
2857 struct e1000_hw *hw = &adapter->hw;
2858 u32 rctl;
2859
2860 rctl = rd32(E1000_RCTL);
2861
2862 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
2863 rctl &= ~(E1000_RCTL_LBM_TCVR | E1000_RCTL_LBM_MAC);
2864
2865 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM | E1000_RCTL_RDMTS_HALF |
2866 (hw->mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
2867
2868 /*
2869 * enable stripping of CRC. It's unlikely this will break BMC
2870 * redirection as it did with e1000. Newer features require
2871 * that the HW strips the CRC.
2872 */
2873 rctl |= E1000_RCTL_SECRC;
2874
2875 /* disable store bad packets and clear size bits. */
2876 rctl &= ~(E1000_RCTL_SBP | E1000_RCTL_SZ_256);
2877
2878 /* enable LPE to prevent packets larger than max_frame_size */
2879 rctl |= E1000_RCTL_LPE;
2880
2881 /* disable queue 0 to prevent tail write w/o re-config */
2882 wr32(E1000_RXDCTL(0), 0);
2883
2884 /* Attention!!! For SR-IOV PF driver operations you must enable
2885 * queue drop for all VF and PF queues to prevent head of line blocking
2886 * if an un-trusted VF does not provide descriptors to hardware.
2887 */
2888 if (adapter->vfs_allocated_count) {
2889 /* set all queue drop enable bits */
2890 wr32(E1000_QDE, ALL_QUEUES);
2891 }
2892
2893 wr32(E1000_RCTL, rctl);
2894 }
2895
2896 static inline int igb_set_vf_rlpml(struct igb_adapter *adapter, int size,
2897 int vfn)
2898 {
2899 struct e1000_hw *hw = &adapter->hw;
2900 u32 vmolr;
2901
2902 /* if it isn't the PF check to see if VFs are enabled and
2903 * increase the size to support vlan tags */
2904 if (vfn < adapter->vfs_allocated_count &&
2905 adapter->vf_data[vfn].vlans_enabled)
2906 size += VLAN_TAG_SIZE;
2907
2908 vmolr = rd32(E1000_VMOLR(vfn));
2909 vmolr &= ~E1000_VMOLR_RLPML_MASK;
2910 vmolr |= size | E1000_VMOLR_LPE;
2911 wr32(E1000_VMOLR(vfn), vmolr);
2912
2913 return 0;
2914 }
2915
2916 /**
2917 * igb_rlpml_set - set maximum receive packet size
2918 * @adapter: board private structure
2919 *
2920 * Configure maximum receivable packet size.
2921 **/
2922 static void igb_rlpml_set(struct igb_adapter *adapter)
2923 {
2924 u32 max_frame_size = adapter->max_frame_size;
2925 struct e1000_hw *hw = &adapter->hw;
2926 u16 pf_id = adapter->vfs_allocated_count;
2927
2928 if (adapter->vlgrp)
2929 max_frame_size += VLAN_TAG_SIZE;
2930
2931 /* if vfs are enabled we set RLPML to the largest possible request
2932 * size and set the VMOLR RLPML to the size we need */
2933 if (pf_id) {
2934 igb_set_vf_rlpml(adapter, max_frame_size, pf_id);
2935 max_frame_size = MAX_JUMBO_FRAME_SIZE;
2936 }
2937
2938 wr32(E1000_RLPML, max_frame_size);
2939 }
2940
2941 static inline void igb_set_vmolr(struct igb_adapter *adapter,
2942 int vfn, bool aupe)
2943 {
2944 struct e1000_hw *hw = &adapter->hw;
2945 u32 vmolr;
2946
2947 /*
2948 * This register exists only on 82576 and newer so if we are older then
2949 * we should exit and do nothing
2950 */
2951 if (hw->mac.type < e1000_82576)
2952 return;
2953
2954 vmolr = rd32(E1000_VMOLR(vfn));
2955 vmolr |= E1000_VMOLR_STRVLAN; /* Strip vlan tags */
2956 if (aupe)
2957 vmolr |= E1000_VMOLR_AUPE; /* Accept untagged packets */
2958 else
2959 vmolr &= ~(E1000_VMOLR_AUPE); /* Tagged packets ONLY */
2960
2961 /* clear all bits that might not be set */
2962 vmolr &= ~(E1000_VMOLR_BAM | E1000_VMOLR_RSSE);
2963
2964 if (adapter->rss_queues > 1 && vfn == adapter->vfs_allocated_count)
2965 vmolr |= E1000_VMOLR_RSSE; /* enable RSS */
2966 /*
2967 * for VMDq only allow the VFs and pool 0 to accept broadcast and
2968 * multicast packets
2969 */
2970 if (vfn <= adapter->vfs_allocated_count)
2971 vmolr |= E1000_VMOLR_BAM; /* Accept broadcast */
2972
2973 wr32(E1000_VMOLR(vfn), vmolr);
2974 }
2975
2976 /**
2977 * igb_configure_rx_ring - Configure a receive ring after Reset
2978 * @adapter: board private structure
2979 * @ring: receive ring to be configured
2980 *
2981 * Configure the Rx unit of the MAC after a reset.
2982 **/
2983 void igb_configure_rx_ring(struct igb_adapter *adapter,
2984 struct igb_ring *ring)
2985 {
2986 struct e1000_hw *hw = &adapter->hw;
2987 u64 rdba = ring->dma;
2988 int reg_idx = ring->reg_idx;
2989 u32 srrctl, rxdctl;
2990
2991 /* disable the queue */
2992 rxdctl = rd32(E1000_RXDCTL(reg_idx));
2993 wr32(E1000_RXDCTL(reg_idx),
2994 rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
2995
2996 /* Set DMA base address registers */
2997 wr32(E1000_RDBAL(reg_idx),
2998 rdba & 0x00000000ffffffffULL);
2999 wr32(E1000_RDBAH(reg_idx), rdba >> 32);
3000 wr32(E1000_RDLEN(reg_idx),
3001 ring->count * sizeof(union e1000_adv_rx_desc));
3002
3003 /* initialize head and tail */
3004 ring->head = hw->hw_addr + E1000_RDH(reg_idx);
3005 ring->tail = hw->hw_addr + E1000_RDT(reg_idx);
3006 writel(0, ring->head);
3007 writel(0, ring->tail);
3008
3009 /* set descriptor configuration */
3010 if (ring->rx_buffer_len < IGB_RXBUFFER_1024) {
3011 srrctl = ALIGN(ring->rx_buffer_len, 64) <<
3012 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
3013 #if (PAGE_SIZE / 2) > IGB_RXBUFFER_16384
3014 srrctl |= IGB_RXBUFFER_16384 >>
3015 E1000_SRRCTL_BSIZEPKT_SHIFT;
3016 #else
3017 srrctl |= (PAGE_SIZE / 2) >>
3018 E1000_SRRCTL_BSIZEPKT_SHIFT;
3019 #endif
3020 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
3021 } else {
3022 srrctl = ALIGN(ring->rx_buffer_len, 1024) >>
3023 E1000_SRRCTL_BSIZEPKT_SHIFT;
3024 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
3025 }
3026 if (hw->mac.type == e1000_82580)
3027 srrctl |= E1000_SRRCTL_TIMESTAMP;
3028 /* Only set Drop Enable if we are supporting multiple queues */
3029 if (adapter->vfs_allocated_count || adapter->num_rx_queues > 1)
3030 srrctl |= E1000_SRRCTL_DROP_EN;
3031
3032 wr32(E1000_SRRCTL(reg_idx), srrctl);
3033
3034 /* set filtering for VMDQ pools */
3035 igb_set_vmolr(adapter, reg_idx & 0x7, true);
3036
3037 /* enable receive descriptor fetching */
3038 rxdctl = rd32(E1000_RXDCTL(reg_idx));
3039 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
3040 rxdctl &= 0xFFF00000;
3041 rxdctl |= IGB_RX_PTHRESH;
3042 rxdctl |= IGB_RX_HTHRESH << 8;
3043 rxdctl |= IGB_RX_WTHRESH << 16;
3044 wr32(E1000_RXDCTL(reg_idx), rxdctl);
3045 }
3046
3047 /**
3048 * igb_configure_rx - Configure receive Unit after Reset
3049 * @adapter: board private structure
3050 *
3051 * Configure the Rx unit of the MAC after a reset.
3052 **/
3053 static void igb_configure_rx(struct igb_adapter *adapter)
3054 {
3055 int i;
3056
3057 /* set UTA to appropriate mode */
3058 igb_set_uta(adapter);
3059
3060 /* set the correct pool for the PF default MAC address in entry 0 */
3061 igb_rar_set_qsel(adapter, adapter->hw.mac.addr, 0,
3062 adapter->vfs_allocated_count);
3063
3064 /* Setup the HW Rx Head and Tail Descriptor Pointers and
3065 * the Base and Length of the Rx Descriptor Ring */
3066 for (i = 0; i < adapter->num_rx_queues; i++)
3067 igb_configure_rx_ring(adapter, adapter->rx_ring[i]);
3068 }
3069
3070 /**
3071 * igb_free_tx_resources - Free Tx Resources per Queue
3072 * @tx_ring: Tx descriptor ring for a specific queue
3073 *
3074 * Free all transmit software resources
3075 **/
3076 void igb_free_tx_resources(struct igb_ring *tx_ring)
3077 {
3078 igb_clean_tx_ring(tx_ring);
3079
3080 vfree(tx_ring->buffer_info);
3081 tx_ring->buffer_info = NULL;
3082
3083 /* if not set, then don't free */
3084 if (!tx_ring->desc)
3085 return;
3086
3087 dma_free_coherent(tx_ring->dev, tx_ring->size,
3088 tx_ring->desc, tx_ring->dma);
3089
3090 tx_ring->desc = NULL;
3091 }
3092
3093 /**
3094 * igb_free_all_tx_resources - Free Tx Resources for All Queues
3095 * @adapter: board private structure
3096 *
3097 * Free all transmit software resources
3098 **/
3099 static void igb_free_all_tx_resources(struct igb_adapter *adapter)
3100 {
3101 int i;
3102
3103 for (i = 0; i < adapter->num_tx_queues; i++)
3104 igb_free_tx_resources(adapter->tx_ring[i]);
3105 }
3106
3107 void igb_unmap_and_free_tx_resource(struct igb_ring *tx_ring,
3108 struct igb_buffer *buffer_info)
3109 {
3110 if (buffer_info->dma) {
3111 if (buffer_info->mapped_as_page)
3112 dma_unmap_page(tx_ring->dev,
3113 buffer_info->dma,
3114 buffer_info->length,
3115 DMA_TO_DEVICE);
3116 else
3117 dma_unmap_single(tx_ring->dev,
3118 buffer_info->dma,
3119 buffer_info->length,
3120 DMA_TO_DEVICE);
3121 buffer_info->dma = 0;
3122 }
3123 if (buffer_info->skb) {
3124 dev_kfree_skb_any(buffer_info->skb);
3125 buffer_info->skb = NULL;
3126 }
3127 buffer_info->time_stamp = 0;
3128 buffer_info->length = 0;
3129 buffer_info->next_to_watch = 0;
3130 buffer_info->mapped_as_page = false;
3131 }
3132
3133 /**
3134 * igb_clean_tx_ring - Free Tx Buffers
3135 * @tx_ring: ring to be cleaned
3136 **/
3137 static void igb_clean_tx_ring(struct igb_ring *tx_ring)
3138 {
3139 struct igb_buffer *buffer_info;
3140 unsigned long size;
3141 unsigned int i;
3142
3143 if (!tx_ring->buffer_info)
3144 return;
3145 /* Free all the Tx ring sk_buffs */
3146
3147 for (i = 0; i < tx_ring->count; i++) {
3148 buffer_info = &tx_ring->buffer_info[i];
3149 igb_unmap_and_free_tx_resource(tx_ring, buffer_info);
3150 }
3151
3152 size = sizeof(struct igb_buffer) * tx_ring->count;
3153 memset(tx_ring->buffer_info, 0, size);
3154
3155 /* Zero out the descriptor ring */
3156 memset(tx_ring->desc, 0, tx_ring->size);
3157
3158 tx_ring->next_to_use = 0;
3159 tx_ring->next_to_clean = 0;
3160 }
3161
3162 /**
3163 * igb_clean_all_tx_rings - Free Tx Buffers for all queues
3164 * @adapter: board private structure
3165 **/
3166 static void igb_clean_all_tx_rings(struct igb_adapter *adapter)
3167 {
3168 int i;
3169
3170 for (i = 0; i < adapter->num_tx_queues; i++)
3171 igb_clean_tx_ring(adapter->tx_ring[i]);
3172 }
3173
3174 /**
3175 * igb_free_rx_resources - Free Rx Resources
3176 * @rx_ring: ring to clean the resources from
3177 *
3178 * Free all receive software resources
3179 **/
3180 void igb_free_rx_resources(struct igb_ring *rx_ring)
3181 {
3182 igb_clean_rx_ring(rx_ring);
3183
3184 vfree(rx_ring->buffer_info);
3185 rx_ring->buffer_info = NULL;
3186
3187 /* if not set, then don't free */
3188 if (!rx_ring->desc)
3189 return;
3190
3191 dma_free_coherent(rx_ring->dev, rx_ring->size,
3192 rx_ring->desc, rx_ring->dma);
3193
3194 rx_ring->desc = NULL;
3195 }
3196
3197 /**
3198 * igb_free_all_rx_resources - Free Rx Resources for All Queues
3199 * @adapter: board private structure
3200 *
3201 * Free all receive software resources
3202 **/
3203 static void igb_free_all_rx_resources(struct igb_adapter *adapter)
3204 {
3205 int i;
3206
3207 for (i = 0; i < adapter->num_rx_queues; i++)
3208 igb_free_rx_resources(adapter->rx_ring[i]);
3209 }
3210
3211 /**
3212 * igb_clean_rx_ring - Free Rx Buffers per Queue
3213 * @rx_ring: ring to free buffers from
3214 **/
3215 static void igb_clean_rx_ring(struct igb_ring *rx_ring)
3216 {
3217 struct igb_buffer *buffer_info;
3218 unsigned long size;
3219 unsigned int i;
3220
3221 if (!rx_ring->buffer_info)
3222 return;
3223
3224 /* Free all the Rx ring sk_buffs */
3225 for (i = 0; i < rx_ring->count; i++) {
3226 buffer_info = &rx_ring->buffer_info[i];
3227 if (buffer_info->dma) {
3228 dma_unmap_single(rx_ring->dev,
3229 buffer_info->dma,
3230 rx_ring->rx_buffer_len,
3231 DMA_FROM_DEVICE);
3232 buffer_info->dma = 0;
3233 }
3234
3235 if (buffer_info->skb) {
3236 dev_kfree_skb(buffer_info->skb);
3237 buffer_info->skb = NULL;
3238 }
3239 if (buffer_info->page_dma) {
3240 dma_unmap_page(rx_ring->dev,
3241 buffer_info->page_dma,
3242 PAGE_SIZE / 2,
3243 DMA_FROM_DEVICE);
3244 buffer_info->page_dma = 0;
3245 }
3246 if (buffer_info->page) {
3247 put_page(buffer_info->page);
3248 buffer_info->page = NULL;
3249 buffer_info->page_offset = 0;
3250 }
3251 }
3252
3253 size = sizeof(struct igb_buffer) * rx_ring->count;
3254 memset(rx_ring->buffer_info, 0, size);
3255
3256 /* Zero out the descriptor ring */
3257 memset(rx_ring->desc, 0, rx_ring->size);
3258
3259 rx_ring->next_to_clean = 0;
3260 rx_ring->next_to_use = 0;
3261 }
3262
3263 /**
3264 * igb_clean_all_rx_rings - Free Rx Buffers for all queues
3265 * @adapter: board private structure
3266 **/
3267 static void igb_clean_all_rx_rings(struct igb_adapter *adapter)
3268 {
3269 int i;
3270
3271 for (i = 0; i < adapter->num_rx_queues; i++)
3272 igb_clean_rx_ring(adapter->rx_ring[i]);
3273 }
3274
3275 /**
3276 * igb_set_mac - Change the Ethernet Address of the NIC
3277 * @netdev: network interface device structure
3278 * @p: pointer to an address structure
3279 *
3280 * Returns 0 on success, negative on failure
3281 **/
3282 static int igb_set_mac(struct net_device *netdev, void *p)
3283 {
3284 struct igb_adapter *adapter = netdev_priv(netdev);
3285 struct e1000_hw *hw = &adapter->hw;
3286 struct sockaddr *addr = p;
3287
3288 if (!is_valid_ether_addr(addr->sa_data))
3289 return -EADDRNOTAVAIL;
3290
3291 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3292 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
3293
3294 /* set the correct pool for the new PF MAC address in entry 0 */
3295 igb_rar_set_qsel(adapter, hw->mac.addr, 0,
3296 adapter->vfs_allocated_count);
3297
3298 return 0;
3299 }
3300
3301 /**
3302 * igb_write_mc_addr_list - write multicast addresses to MTA
3303 * @netdev: network interface device structure
3304 *
3305 * Writes multicast address list to the MTA hash table.
3306 * Returns: -ENOMEM on failure
3307 * 0 on no addresses written
3308 * X on writing X addresses to MTA
3309 **/
3310 static int igb_write_mc_addr_list(struct net_device *netdev)
3311 {
3312 struct igb_adapter *adapter = netdev_priv(netdev);
3313 struct e1000_hw *hw = &adapter->hw;
3314 struct netdev_hw_addr *ha;
3315 u8 *mta_list;
3316 int i;
3317
3318 if (netdev_mc_empty(netdev)) {
3319 /* nothing to program, so clear mc list */
3320 igb_update_mc_addr_list(hw, NULL, 0);
3321 igb_restore_vf_multicasts(adapter);
3322 return 0;
3323 }
3324
3325 mta_list = kzalloc(netdev_mc_count(netdev) * 6, GFP_ATOMIC);
3326 if (!mta_list)
3327 return -ENOMEM;
3328
3329 /* The shared function expects a packed array of only addresses. */
3330 i = 0;
3331 netdev_for_each_mc_addr(ha, netdev)
3332 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
3333
3334 igb_update_mc_addr_list(hw, mta_list, i);
3335 kfree(mta_list);
3336
3337 return netdev_mc_count(netdev);
3338 }
3339
3340 /**
3341 * igb_write_uc_addr_list - write unicast addresses to RAR table
3342 * @netdev: network interface device structure
3343 *
3344 * Writes unicast address list to the RAR table.
3345 * Returns: -ENOMEM on failure/insufficient address space
3346 * 0 on no addresses written
3347 * X on writing X addresses to the RAR table
3348 **/
3349 static int igb_write_uc_addr_list(struct net_device *netdev)
3350 {
3351 struct igb_adapter *adapter = netdev_priv(netdev);
3352 struct e1000_hw *hw = &adapter->hw;
3353 unsigned int vfn = adapter->vfs_allocated_count;
3354 unsigned int rar_entries = hw->mac.rar_entry_count - (vfn + 1);
3355 int count = 0;
3356
3357 /* return ENOMEM indicating insufficient memory for addresses */
3358 if (netdev_uc_count(netdev) > rar_entries)
3359 return -ENOMEM;
3360
3361 if (!netdev_uc_empty(netdev) && rar_entries) {
3362 struct netdev_hw_addr *ha;
3363
3364 netdev_for_each_uc_addr(ha, netdev) {
3365 if (!rar_entries)
3366 break;
3367 igb_rar_set_qsel(adapter, ha->addr,
3368 rar_entries--,
3369 vfn);
3370 count++;
3371 }
3372 }
3373 /* write the addresses in reverse order to avoid write combining */
3374 for (; rar_entries > 0 ; rar_entries--) {
3375 wr32(E1000_RAH(rar_entries), 0);
3376 wr32(E1000_RAL(rar_entries), 0);
3377 }
3378 wrfl();
3379
3380 return count;
3381 }
3382
3383 /**
3384 * igb_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
3385 * @netdev: network interface device structure
3386 *
3387 * The set_rx_mode entry point is called whenever the unicast or multicast
3388 * address lists or the network interface flags are updated. This routine is
3389 * responsible for configuring the hardware for proper unicast, multicast,
3390 * promiscuous mode, and all-multi behavior.
3391 **/
3392 static void igb_set_rx_mode(struct net_device *netdev)
3393 {
3394 struct igb_adapter *adapter = netdev_priv(netdev);
3395 struct e1000_hw *hw = &adapter->hw;
3396 unsigned int vfn = adapter->vfs_allocated_count;
3397 u32 rctl, vmolr = 0;
3398 int count;
3399
3400 /* Check for Promiscuous and All Multicast modes */
3401 rctl = rd32(E1000_RCTL);
3402
3403 /* clear the effected bits */
3404 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE | E1000_RCTL_VFE);
3405
3406 if (netdev->flags & IFF_PROMISC) {
3407 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
3408 vmolr |= (E1000_VMOLR_ROPE | E1000_VMOLR_MPME);
3409 } else {
3410 if (netdev->flags & IFF_ALLMULTI) {
3411 rctl |= E1000_RCTL_MPE;
3412 vmolr |= E1000_VMOLR_MPME;
3413 } else {
3414 /*
3415 * Write addresses to the MTA, if the attempt fails
3416 * then we should just turn on promiscuous mode so
3417 * that we can at least receive multicast traffic
3418 */
3419 count = igb_write_mc_addr_list(netdev);
3420 if (count < 0) {
3421 rctl |= E1000_RCTL_MPE;
3422 vmolr |= E1000_VMOLR_MPME;
3423 } else if (count) {
3424 vmolr |= E1000_VMOLR_ROMPE;
3425 }
3426 }
3427 /*
3428 * Write addresses to available RAR registers, if there is not
3429 * sufficient space to store all the addresses then enable
3430 * unicast promiscuous mode
3431 */
3432 count = igb_write_uc_addr_list(netdev);
3433 if (count < 0) {
3434 rctl |= E1000_RCTL_UPE;
3435 vmolr |= E1000_VMOLR_ROPE;
3436 }
3437 rctl |= E1000_RCTL_VFE;
3438 }
3439 wr32(E1000_RCTL, rctl);
3440
3441 /*
3442 * In order to support SR-IOV and eventually VMDq it is necessary to set
3443 * the VMOLR to enable the appropriate modes. Without this workaround
3444 * we will have issues with VLAN tag stripping not being done for frames
3445 * that are only arriving because we are the default pool
3446 */
3447 if (hw->mac.type < e1000_82576)
3448 return;
3449
3450 vmolr |= rd32(E1000_VMOLR(vfn)) &
3451 ~(E1000_VMOLR_ROPE | E1000_VMOLR_MPME | E1000_VMOLR_ROMPE);
3452 wr32(E1000_VMOLR(vfn), vmolr);
3453 igb_restore_vf_multicasts(adapter);
3454 }
3455
3456 static void igb_check_wvbr(struct igb_adapter *adapter)
3457 {
3458 struct e1000_hw *hw = &adapter->hw;
3459 u32 wvbr = 0;
3460
3461 switch (hw->mac.type) {
3462 case e1000_82576:
3463 case e1000_i350:
3464 if (!(wvbr = rd32(E1000_WVBR)))
3465 return;
3466 break;
3467 default:
3468 break;
3469 }
3470
3471 adapter->wvbr |= wvbr;
3472 }
3473
3474 #define IGB_STAGGERED_QUEUE_OFFSET 8
3475
3476 static void igb_spoof_check(struct igb_adapter *adapter)
3477 {
3478 int j;
3479
3480 if (!adapter->wvbr)
3481 return;
3482
3483 for(j = 0; j < adapter->vfs_allocated_count; j++) {
3484 if (adapter->wvbr & (1 << j) ||
3485 adapter->wvbr & (1 << (j + IGB_STAGGERED_QUEUE_OFFSET))) {
3486 dev_warn(&adapter->pdev->dev,
3487 "Spoof event(s) detected on VF %d\n", j);
3488 adapter->wvbr &=
3489 ~((1 << j) |
3490 (1 << (j + IGB_STAGGERED_QUEUE_OFFSET)));
3491 }
3492 }
3493 }
3494
3495 /* Need to wait a few seconds after link up to get diagnostic information from
3496 * the phy */
3497 static void igb_update_phy_info(unsigned long data)
3498 {
3499 struct igb_adapter *adapter = (struct igb_adapter *) data;
3500 igb_get_phy_info(&adapter->hw);
3501 }
3502
3503 /**
3504 * igb_has_link - check shared code for link and determine up/down
3505 * @adapter: pointer to driver private info
3506 **/
3507 bool igb_has_link(struct igb_adapter *adapter)
3508 {
3509 struct e1000_hw *hw = &adapter->hw;
3510 bool link_active = false;
3511 s32 ret_val = 0;
3512
3513 /* get_link_status is set on LSC (link status) interrupt or
3514 * rx sequence error interrupt. get_link_status will stay
3515 * false until the e1000_check_for_link establishes link
3516 * for copper adapters ONLY
3517 */
3518 switch (hw->phy.media_type) {
3519 case e1000_media_type_copper:
3520 if (hw->mac.get_link_status) {
3521 ret_val = hw->mac.ops.check_for_link(hw);
3522 link_active = !hw->mac.get_link_status;
3523 } else {
3524 link_active = true;
3525 }
3526 break;
3527 case e1000_media_type_internal_serdes:
3528 ret_val = hw->mac.ops.check_for_link(hw);
3529 link_active = hw->mac.serdes_has_link;
3530 break;
3531 default:
3532 case e1000_media_type_unknown:
3533 break;
3534 }
3535
3536 return link_active;
3537 }
3538
3539 static bool igb_thermal_sensor_event(struct e1000_hw *hw, u32 event)
3540 {
3541 bool ret = false;
3542 u32 ctrl_ext, thstat;
3543
3544 /* check for thermal sensor event on i350, copper only */
3545 if (hw->mac.type == e1000_i350) {
3546 thstat = rd32(E1000_THSTAT);
3547 ctrl_ext = rd32(E1000_CTRL_EXT);
3548
3549 if ((hw->phy.media_type == e1000_media_type_copper) &&
3550 !(ctrl_ext & E1000_CTRL_EXT_LINK_MODE_SGMII)) {
3551 ret = !!(thstat & event);
3552 }
3553 }
3554
3555 return ret;
3556 }
3557
3558 /**
3559 * igb_watchdog - Timer Call-back
3560 * @data: pointer to adapter cast into an unsigned long
3561 **/
3562 static void igb_watchdog(unsigned long data)
3563 {
3564 struct igb_adapter *adapter = (struct igb_adapter *)data;
3565 /* Do the rest outside of interrupt context */
3566 schedule_work(&adapter->watchdog_task);
3567 }
3568
3569 static void igb_watchdog_task(struct work_struct *work)
3570 {
3571 struct igb_adapter *adapter = container_of(work,
3572 struct igb_adapter,
3573 watchdog_task);
3574 struct e1000_hw *hw = &adapter->hw;
3575 struct net_device *netdev = adapter->netdev;
3576 u32 link;
3577 int i;
3578
3579 link = igb_has_link(adapter);
3580 if (link) {
3581 if (!netif_carrier_ok(netdev)) {
3582 u32 ctrl;
3583 hw->mac.ops.get_speed_and_duplex(hw,
3584 &adapter->link_speed,
3585 &adapter->link_duplex);
3586
3587 ctrl = rd32(E1000_CTRL);
3588 /* Links status message must follow this format */
3589 printk(KERN_INFO "igb: %s NIC Link is Up %d Mbps %s, "
3590 "Flow Control: %s\n",
3591 netdev->name,
3592 adapter->link_speed,
3593 adapter->link_duplex == FULL_DUPLEX ?
3594 "Full Duplex" : "Half Duplex",
3595 ((ctrl & E1000_CTRL_TFCE) &&
3596 (ctrl & E1000_CTRL_RFCE)) ? "RX/TX" :
3597 ((ctrl & E1000_CTRL_RFCE) ? "RX" :
3598 ((ctrl & E1000_CTRL_TFCE) ? "TX" : "None")));
3599
3600 /* check for thermal sensor event */
3601 if (igb_thermal_sensor_event(hw, E1000_THSTAT_LINK_THROTTLE)) {
3602 printk(KERN_INFO "igb: %s The network adapter "
3603 "link speed was downshifted "
3604 "because it overheated.\n",
3605 netdev->name);
3606 }
3607
3608 /* adjust timeout factor according to speed/duplex */
3609 adapter->tx_timeout_factor = 1;
3610 switch (adapter->link_speed) {
3611 case SPEED_10:
3612 adapter->tx_timeout_factor = 14;
3613 break;
3614 case SPEED_100:
3615 /* maybe add some timeout factor ? */
3616 break;
3617 }
3618
3619 netif_carrier_on(netdev);
3620
3621 igb_ping_all_vfs(adapter);
3622 igb_check_vf_rate_limit(adapter);
3623
3624 /* link state has changed, schedule phy info update */
3625 if (!test_bit(__IGB_DOWN, &adapter->state))
3626 mod_timer(&adapter->phy_info_timer,
3627 round_jiffies(jiffies + 2 * HZ));
3628 }
3629 } else {
3630 if (netif_carrier_ok(netdev)) {
3631 adapter->link_speed = 0;
3632 adapter->link_duplex = 0;
3633
3634 /* check for thermal sensor event */
3635 if (igb_thermal_sensor_event(hw, E1000_THSTAT_PWR_DOWN)) {
3636 printk(KERN_ERR "igb: %s The network adapter "
3637 "was stopped because it "
3638 "overheated.\n",
3639 netdev->name);
3640 }
3641
3642 /* Links status message must follow this format */
3643 printk(KERN_INFO "igb: %s NIC Link is Down\n",
3644 netdev->name);
3645 netif_carrier_off(netdev);
3646
3647 igb_ping_all_vfs(adapter);
3648
3649 /* link state has changed, schedule phy info update */
3650 if (!test_bit(__IGB_DOWN, &adapter->state))
3651 mod_timer(&adapter->phy_info_timer,
3652 round_jiffies(jiffies + 2 * HZ));
3653 }
3654 }
3655
3656 spin_lock(&adapter->stats64_lock);
3657 igb_update_stats(adapter, &adapter->stats64);
3658 spin_unlock(&adapter->stats64_lock);
3659
3660 for (i = 0; i < adapter->num_tx_queues; i++) {
3661 struct igb_ring *tx_ring = adapter->tx_ring[i];
3662 if (!netif_carrier_ok(netdev)) {
3663 /* We've lost link, so the controller stops DMA,
3664 * but we've got queued Tx work that's never going
3665 * to get done, so reset controller to flush Tx.
3666 * (Do the reset outside of interrupt context). */
3667 if (igb_desc_unused(tx_ring) + 1 < tx_ring->count) {
3668 adapter->tx_timeout_count++;
3669 schedule_work(&adapter->reset_task);
3670 /* return immediately since reset is imminent */
3671 return;
3672 }
3673 }
3674
3675 /* Force detection of hung controller every watchdog period */
3676 tx_ring->detect_tx_hung = true;
3677 }
3678
3679 /* Cause software interrupt to ensure rx ring is cleaned */
3680 if (adapter->msix_entries) {
3681 u32 eics = 0;
3682 for (i = 0; i < adapter->num_q_vectors; i++) {
3683 struct igb_q_vector *q_vector = adapter->q_vector[i];
3684 eics |= q_vector->eims_value;
3685 }
3686 wr32(E1000_EICS, eics);
3687 } else {
3688 wr32(E1000_ICS, E1000_ICS_RXDMT0);
3689 }
3690
3691 igb_spoof_check(adapter);
3692
3693 /* Reset the timer */
3694 if (!test_bit(__IGB_DOWN, &adapter->state))
3695 mod_timer(&adapter->watchdog_timer,
3696 round_jiffies(jiffies + 2 * HZ));
3697 }
3698
3699 enum latency_range {
3700 lowest_latency = 0,
3701 low_latency = 1,
3702 bulk_latency = 2,
3703 latency_invalid = 255
3704 };
3705
3706 /**
3707 * igb_update_ring_itr - update the dynamic ITR value based on packet size
3708 *
3709 * Stores a new ITR value based on strictly on packet size. This
3710 * algorithm is less sophisticated than that used in igb_update_itr,
3711 * due to the difficulty of synchronizing statistics across multiple
3712 * receive rings. The divisors and thresholds used by this function
3713 * were determined based on theoretical maximum wire speed and testing
3714 * data, in order to minimize response time while increasing bulk
3715 * throughput.
3716 * This functionality is controlled by the InterruptThrottleRate module
3717 * parameter (see igb_param.c)
3718 * NOTE: This function is called only when operating in a multiqueue
3719 * receive environment.
3720 * @q_vector: pointer to q_vector
3721 **/
3722 static void igb_update_ring_itr(struct igb_q_vector *q_vector)
3723 {
3724 int new_val = q_vector->itr_val;
3725 int avg_wire_size = 0;
3726 struct igb_adapter *adapter = q_vector->adapter;
3727 struct igb_ring *ring;
3728 unsigned int packets;
3729
3730 /* For non-gigabit speeds, just fix the interrupt rate at 4000
3731 * ints/sec - ITR timer value of 120 ticks.
3732 */
3733 if (adapter->link_speed != SPEED_1000) {
3734 new_val = 976;
3735 goto set_itr_val;
3736 }
3737
3738 ring = q_vector->rx_ring;
3739 if (ring) {
3740 packets = ACCESS_ONCE(ring->total_packets);
3741
3742 if (packets)
3743 avg_wire_size = ring->total_bytes / packets;
3744 }
3745
3746 ring = q_vector->tx_ring;
3747 if (ring) {
3748 packets = ACCESS_ONCE(ring->total_packets);
3749
3750 if (packets)
3751 avg_wire_size = max_t(u32, avg_wire_size,
3752 ring->total_bytes / packets);
3753 }
3754
3755 /* if avg_wire_size isn't set no work was done */
3756 if (!avg_wire_size)
3757 goto clear_counts;
3758
3759 /* Add 24 bytes to size to account for CRC, preamble, and gap */
3760 avg_wire_size += 24;
3761
3762 /* Don't starve jumbo frames */
3763 avg_wire_size = min(avg_wire_size, 3000);
3764
3765 /* Give a little boost to mid-size frames */
3766 if ((avg_wire_size > 300) && (avg_wire_size < 1200))
3767 new_val = avg_wire_size / 3;
3768 else
3769 new_val = avg_wire_size / 2;
3770
3771 /* when in itr mode 3 do not exceed 20K ints/sec */
3772 if (adapter->rx_itr_setting == 3 && new_val < 196)
3773 new_val = 196;
3774
3775 set_itr_val:
3776 if (new_val != q_vector->itr_val) {
3777 q_vector->itr_val = new_val;
3778 q_vector->set_itr = 1;
3779 }
3780 clear_counts:
3781 if (q_vector->rx_ring) {
3782 q_vector->rx_ring->total_bytes = 0;
3783 q_vector->rx_ring->total_packets = 0;
3784 }
3785 if (q_vector->tx_ring) {
3786 q_vector->tx_ring->total_bytes = 0;
3787 q_vector->tx_ring->total_packets = 0;
3788 }
3789 }
3790
3791 /**
3792 * igb_update_itr - update the dynamic ITR value based on statistics
3793 * Stores a new ITR value based on packets and byte
3794 * counts during the last interrupt. The advantage of per interrupt
3795 * computation is faster updates and more accurate ITR for the current
3796 * traffic pattern. Constants in this function were computed
3797 * based on theoretical maximum wire speed and thresholds were set based
3798 * on testing data as well as attempting to minimize response time
3799 * while increasing bulk throughput.
3800 * this functionality is controlled by the InterruptThrottleRate module
3801 * parameter (see igb_param.c)
3802 * NOTE: These calculations are only valid when operating in a single-
3803 * queue environment.
3804 * @adapter: pointer to adapter
3805 * @itr_setting: current q_vector->itr_val
3806 * @packets: the number of packets during this measurement interval
3807 * @bytes: the number of bytes during this measurement interval
3808 **/
3809 static unsigned int igb_update_itr(struct igb_adapter *adapter, u16 itr_setting,
3810 int packets, int bytes)
3811 {
3812 unsigned int retval = itr_setting;
3813
3814 if (packets == 0)
3815 goto update_itr_done;
3816
3817 switch (itr_setting) {
3818 case lowest_latency:
3819 /* handle TSO and jumbo frames */
3820 if (bytes/packets > 8000)
3821 retval = bulk_latency;
3822 else if ((packets < 5) && (bytes > 512))
3823 retval = low_latency;
3824 break;
3825 case low_latency: /* 50 usec aka 20000 ints/s */
3826 if (bytes > 10000) {
3827 /* this if handles the TSO accounting */
3828 if (bytes/packets > 8000) {
3829 retval = bulk_latency;
3830 } else if ((packets < 10) || ((bytes/packets) > 1200)) {
3831 retval = bulk_latency;
3832 } else if ((packets > 35)) {
3833 retval = lowest_latency;
3834 }
3835 } else if (bytes/packets > 2000) {
3836 retval = bulk_latency;
3837 } else if (packets <= 2 && bytes < 512) {
3838 retval = lowest_latency;
3839 }
3840 break;
3841 case bulk_latency: /* 250 usec aka 4000 ints/s */
3842 if (bytes > 25000) {
3843 if (packets > 35)
3844 retval = low_latency;
3845 } else if (bytes < 1500) {
3846 retval = low_latency;
3847 }
3848 break;
3849 }
3850
3851 update_itr_done:
3852 return retval;
3853 }
3854
3855 static void igb_set_itr(struct igb_adapter *adapter)
3856 {
3857 struct igb_q_vector *q_vector = adapter->q_vector[0];
3858 u16 current_itr;
3859 u32 new_itr = q_vector->itr_val;
3860
3861 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
3862 if (adapter->link_speed != SPEED_1000) {
3863 current_itr = 0;
3864 new_itr = 4000;
3865 goto set_itr_now;
3866 }
3867
3868 adapter->rx_itr = igb_update_itr(adapter,
3869 adapter->rx_itr,
3870 q_vector->rx_ring->total_packets,
3871 q_vector->rx_ring->total_bytes);
3872
3873 adapter->tx_itr = igb_update_itr(adapter,
3874 adapter->tx_itr,
3875 q_vector->tx_ring->total_packets,
3876 q_vector->tx_ring->total_bytes);
3877 current_itr = max(adapter->rx_itr, adapter->tx_itr);
3878
3879 /* conservative mode (itr 3) eliminates the lowest_latency setting */
3880 if (adapter->rx_itr_setting == 3 && current_itr == lowest_latency)
3881 current_itr = low_latency;
3882
3883 switch (current_itr) {
3884 /* counts and packets in update_itr are dependent on these numbers */
3885 case lowest_latency:
3886 new_itr = 56; /* aka 70,000 ints/sec */
3887 break;
3888 case low_latency:
3889 new_itr = 196; /* aka 20,000 ints/sec */
3890 break;
3891 case bulk_latency:
3892 new_itr = 980; /* aka 4,000 ints/sec */
3893 break;
3894 default:
3895 break;
3896 }
3897
3898 set_itr_now:
3899 q_vector->rx_ring->total_bytes = 0;
3900 q_vector->rx_ring->total_packets = 0;
3901 q_vector->tx_ring->total_bytes = 0;
3902 q_vector->tx_ring->total_packets = 0;
3903
3904 if (new_itr != q_vector->itr_val) {
3905 /* this attempts to bias the interrupt rate towards Bulk
3906 * by adding intermediate steps when interrupt rate is
3907 * increasing */
3908 new_itr = new_itr > q_vector->itr_val ?
3909 max((new_itr * q_vector->itr_val) /
3910 (new_itr + (q_vector->itr_val >> 2)),
3911 new_itr) :
3912 new_itr;
3913 /* Don't write the value here; it resets the adapter's
3914 * internal timer, and causes us to delay far longer than
3915 * we should between interrupts. Instead, we write the ITR
3916 * value at the beginning of the next interrupt so the timing
3917 * ends up being correct.
3918 */
3919 q_vector->itr_val = new_itr;
3920 q_vector->set_itr = 1;
3921 }
3922 }
3923
3924 #define IGB_TX_FLAGS_CSUM 0x00000001
3925 #define IGB_TX_FLAGS_VLAN 0x00000002
3926 #define IGB_TX_FLAGS_TSO 0x00000004
3927 #define IGB_TX_FLAGS_IPV4 0x00000008
3928 #define IGB_TX_FLAGS_TSTAMP 0x00000010
3929 #define IGB_TX_FLAGS_VLAN_MASK 0xffff0000
3930 #define IGB_TX_FLAGS_VLAN_SHIFT 16
3931
3932 static inline int igb_tso_adv(struct igb_ring *tx_ring,
3933 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
3934 {
3935 struct e1000_adv_tx_context_desc *context_desc;
3936 unsigned int i;
3937 int err;
3938 struct igb_buffer *buffer_info;
3939 u32 info = 0, tu_cmd = 0;
3940 u32 mss_l4len_idx;
3941 u8 l4len;
3942
3943 if (skb_header_cloned(skb)) {
3944 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
3945 if (err)
3946 return err;
3947 }
3948
3949 l4len = tcp_hdrlen(skb);
3950 *hdr_len += l4len;
3951
3952 if (skb->protocol == htons(ETH_P_IP)) {
3953 struct iphdr *iph = ip_hdr(skb);
3954 iph->tot_len = 0;
3955 iph->check = 0;
3956 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
3957 iph->daddr, 0,
3958 IPPROTO_TCP,
3959 0);
3960 } else if (skb_is_gso_v6(skb)) {
3961 ipv6_hdr(skb)->payload_len = 0;
3962 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
3963 &ipv6_hdr(skb)->daddr,
3964 0, IPPROTO_TCP, 0);
3965 }
3966
3967 i = tx_ring->next_to_use;
3968
3969 buffer_info = &tx_ring->buffer_info[i];
3970 context_desc = E1000_TX_CTXTDESC_ADV(*tx_ring, i);
3971 /* VLAN MACLEN IPLEN */
3972 if (tx_flags & IGB_TX_FLAGS_VLAN)
3973 info |= (tx_flags & IGB_TX_FLAGS_VLAN_MASK);
3974 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
3975 *hdr_len += skb_network_offset(skb);
3976 info |= skb_network_header_len(skb);
3977 *hdr_len += skb_network_header_len(skb);
3978 context_desc->vlan_macip_lens = cpu_to_le32(info);
3979
3980 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
3981 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
3982
3983 if (skb->protocol == htons(ETH_P_IP))
3984 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
3985 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
3986
3987 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
3988
3989 /* MSS L4LEN IDX */
3990 mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT);
3991 mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT);
3992
3993 /* For 82575, context index must be unique per ring. */
3994 if (tx_ring->flags & IGB_RING_FLAG_TX_CTX_IDX)
3995 mss_l4len_idx |= tx_ring->reg_idx << 4;
3996
3997 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
3998 context_desc->seqnum_seed = 0;
3999
4000 buffer_info->time_stamp = jiffies;
4001 buffer_info->next_to_watch = i;
4002 buffer_info->dma = 0;
4003 i++;
4004 if (i == tx_ring->count)
4005 i = 0;
4006
4007 tx_ring->next_to_use = i;
4008
4009 return true;
4010 }
4011
4012 static inline bool igb_tx_csum_adv(struct igb_ring *tx_ring,
4013 struct sk_buff *skb, u32 tx_flags)
4014 {
4015 struct e1000_adv_tx_context_desc *context_desc;
4016 struct device *dev = tx_ring->dev;
4017 struct igb_buffer *buffer_info;
4018 u32 info = 0, tu_cmd = 0;
4019 unsigned int i;
4020
4021 if ((skb->ip_summed == CHECKSUM_PARTIAL) ||
4022 (tx_flags & IGB_TX_FLAGS_VLAN)) {
4023 i = tx_ring->next_to_use;
4024 buffer_info = &tx_ring->buffer_info[i];
4025 context_desc = E1000_TX_CTXTDESC_ADV(*tx_ring, i);
4026
4027 if (tx_flags & IGB_TX_FLAGS_VLAN)
4028 info |= (tx_flags & IGB_TX_FLAGS_VLAN_MASK);
4029
4030 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
4031 if (skb->ip_summed == CHECKSUM_PARTIAL)
4032 info |= skb_network_header_len(skb);
4033
4034 context_desc->vlan_macip_lens = cpu_to_le32(info);
4035
4036 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
4037
4038 if (skb->ip_summed == CHECKSUM_PARTIAL) {
4039 __be16 protocol;
4040
4041 if (skb->protocol == cpu_to_be16(ETH_P_8021Q)) {
4042 const struct vlan_ethhdr *vhdr =
4043 (const struct vlan_ethhdr*)skb->data;
4044
4045 protocol = vhdr->h_vlan_encapsulated_proto;
4046 } else {
4047 protocol = skb->protocol;
4048 }
4049
4050 switch (protocol) {
4051 case cpu_to_be16(ETH_P_IP):
4052 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
4053 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
4054 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
4055 else if (ip_hdr(skb)->protocol == IPPROTO_SCTP)
4056 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_SCTP;
4057 break;
4058 case cpu_to_be16(ETH_P_IPV6):
4059 /* XXX what about other V6 headers?? */
4060 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
4061 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
4062 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_SCTP)
4063 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_SCTP;
4064 break;
4065 default:
4066 if (unlikely(net_ratelimit()))
4067 dev_warn(dev,
4068 "partial checksum but proto=%x!\n",
4069 skb->protocol);
4070 break;
4071 }
4072 }
4073
4074 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
4075 context_desc->seqnum_seed = 0;
4076 if (tx_ring->flags & IGB_RING_FLAG_TX_CTX_IDX)
4077 context_desc->mss_l4len_idx =
4078 cpu_to_le32(tx_ring->reg_idx << 4);
4079
4080 buffer_info->time_stamp = jiffies;
4081 buffer_info->next_to_watch = i;
4082 buffer_info->dma = 0;
4083
4084 i++;
4085 if (i == tx_ring->count)
4086 i = 0;
4087 tx_ring->next_to_use = i;
4088
4089 return true;
4090 }
4091 return false;
4092 }
4093
4094 #define IGB_MAX_TXD_PWR 16
4095 #define IGB_MAX_DATA_PER_TXD (1<<IGB_MAX_TXD_PWR)
4096
4097 static inline int igb_tx_map_adv(struct igb_ring *tx_ring, struct sk_buff *skb,
4098 unsigned int first)
4099 {
4100 struct igb_buffer *buffer_info;
4101 struct device *dev = tx_ring->dev;
4102 unsigned int hlen = skb_headlen(skb);
4103 unsigned int count = 0, i;
4104 unsigned int f;
4105 u16 gso_segs = skb_shinfo(skb)->gso_segs ?: 1;
4106
4107 i = tx_ring->next_to_use;
4108
4109 buffer_info = &tx_ring->buffer_info[i];
4110 BUG_ON(hlen >= IGB_MAX_DATA_PER_TXD);
4111 buffer_info->length = hlen;
4112 /* set time_stamp *before* dma to help avoid a possible race */
4113 buffer_info->time_stamp = jiffies;
4114 buffer_info->next_to_watch = i;
4115 buffer_info->dma = dma_map_single(dev, skb->data, hlen,
4116 DMA_TO_DEVICE);
4117 if (dma_mapping_error(dev, buffer_info->dma))
4118 goto dma_error;
4119
4120 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
4121 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[f];
4122 unsigned int len = frag->size;
4123
4124 count++;
4125 i++;
4126 if (i == tx_ring->count)
4127 i = 0;
4128
4129 buffer_info = &tx_ring->buffer_info[i];
4130 BUG_ON(len >= IGB_MAX_DATA_PER_TXD);
4131 buffer_info->length = len;
4132 buffer_info->time_stamp = jiffies;
4133 buffer_info->next_to_watch = i;
4134 buffer_info->mapped_as_page = true;
4135 buffer_info->dma = dma_map_page(dev,
4136 frag->page,
4137 frag->page_offset,
4138 len,
4139 DMA_TO_DEVICE);
4140 if (dma_mapping_error(dev, buffer_info->dma))
4141 goto dma_error;
4142
4143 }
4144
4145 tx_ring->buffer_info[i].skb = skb;
4146 tx_ring->buffer_info[i].tx_flags = skb_shinfo(skb)->tx_flags;
4147 /* multiply data chunks by size of headers */
4148 tx_ring->buffer_info[i].bytecount = ((gso_segs - 1) * hlen) + skb->len;
4149 tx_ring->buffer_info[i].gso_segs = gso_segs;
4150 tx_ring->buffer_info[first].next_to_watch = i;
4151
4152 return ++count;
4153
4154 dma_error:
4155 dev_err(dev, "TX DMA map failed\n");
4156
4157 /* clear timestamp and dma mappings for failed buffer_info mapping */
4158 buffer_info->dma = 0;
4159 buffer_info->time_stamp = 0;
4160 buffer_info->length = 0;
4161 buffer_info->next_to_watch = 0;
4162 buffer_info->mapped_as_page = false;
4163
4164 /* clear timestamp and dma mappings for remaining portion of packet */
4165 while (count--) {
4166 if (i == 0)
4167 i = tx_ring->count;
4168 i--;
4169 buffer_info = &tx_ring->buffer_info[i];
4170 igb_unmap_and_free_tx_resource(tx_ring, buffer_info);
4171 }
4172
4173 return 0;
4174 }
4175
4176 static inline void igb_tx_queue_adv(struct igb_ring *tx_ring,
4177 u32 tx_flags, int count, u32 paylen,
4178 u8 hdr_len)
4179 {
4180 union e1000_adv_tx_desc *tx_desc;
4181 struct igb_buffer *buffer_info;
4182 u32 olinfo_status = 0, cmd_type_len;
4183 unsigned int i = tx_ring->next_to_use;
4184
4185 cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS |
4186 E1000_ADVTXD_DCMD_DEXT);
4187
4188 if (tx_flags & IGB_TX_FLAGS_VLAN)
4189 cmd_type_len |= E1000_ADVTXD_DCMD_VLE;
4190
4191 if (tx_flags & IGB_TX_FLAGS_TSTAMP)
4192 cmd_type_len |= E1000_ADVTXD_MAC_TSTAMP;
4193
4194 if (tx_flags & IGB_TX_FLAGS_TSO) {
4195 cmd_type_len |= E1000_ADVTXD_DCMD_TSE;
4196
4197 /* insert tcp checksum */
4198 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
4199
4200 /* insert ip checksum */
4201 if (tx_flags & IGB_TX_FLAGS_IPV4)
4202 olinfo_status |= E1000_TXD_POPTS_IXSM << 8;
4203
4204 } else if (tx_flags & IGB_TX_FLAGS_CSUM) {
4205 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
4206 }
4207
4208 if ((tx_ring->flags & IGB_RING_FLAG_TX_CTX_IDX) &&
4209 (tx_flags & (IGB_TX_FLAGS_CSUM |
4210 IGB_TX_FLAGS_TSO |
4211 IGB_TX_FLAGS_VLAN)))
4212 olinfo_status |= tx_ring->reg_idx << 4;
4213
4214 olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT);
4215
4216 do {
4217 buffer_info = &tx_ring->buffer_info[i];
4218 tx_desc = E1000_TX_DESC_ADV(*tx_ring, i);
4219 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
4220 tx_desc->read.cmd_type_len =
4221 cpu_to_le32(cmd_type_len | buffer_info->length);
4222 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
4223 count--;
4224 i++;
4225 if (i == tx_ring->count)
4226 i = 0;
4227 } while (count > 0);
4228
4229 tx_desc->read.cmd_type_len |= cpu_to_le32(IGB_ADVTXD_DCMD);
4230 /* Force memory writes to complete before letting h/w
4231 * know there are new descriptors to fetch. (Only
4232 * applicable for weak-ordered memory model archs,
4233 * such as IA-64). */
4234 wmb();
4235
4236 tx_ring->next_to_use = i;
4237 writel(i, tx_ring->tail);
4238 /* we need this if more than one processor can write to our tail
4239 * at a time, it syncronizes IO on IA64/Altix systems */
4240 mmiowb();
4241 }
4242
4243 static int __igb_maybe_stop_tx(struct igb_ring *tx_ring, int size)
4244 {
4245 struct net_device *netdev = tx_ring->netdev;
4246
4247 netif_stop_subqueue(netdev, tx_ring->queue_index);
4248
4249 /* Herbert's original patch had:
4250 * smp_mb__after_netif_stop_queue();
4251 * but since that doesn't exist yet, just open code it. */
4252 smp_mb();
4253
4254 /* We need to check again in a case another CPU has just
4255 * made room available. */
4256 if (igb_desc_unused(tx_ring) < size)
4257 return -EBUSY;
4258
4259 /* A reprieve! */
4260 netif_wake_subqueue(netdev, tx_ring->queue_index);
4261
4262 u64_stats_update_begin(&tx_ring->tx_syncp2);
4263 tx_ring->tx_stats.restart_queue2++;
4264 u64_stats_update_end(&tx_ring->tx_syncp2);
4265
4266 return 0;
4267 }
4268
4269 static inline int igb_maybe_stop_tx(struct igb_ring *tx_ring, int size)
4270 {
4271 if (igb_desc_unused(tx_ring) >= size)
4272 return 0;
4273 return __igb_maybe_stop_tx(tx_ring, size);
4274 }
4275
4276 netdev_tx_t igb_xmit_frame_ring_adv(struct sk_buff *skb,
4277 struct igb_ring *tx_ring)
4278 {
4279 int tso = 0, count;
4280 u32 tx_flags = 0;
4281 u16 first;
4282 u8 hdr_len = 0;
4283
4284 /* need: 1 descriptor per page,
4285 * + 2 desc gap to keep tail from touching head,
4286 * + 1 desc for skb->data,
4287 * + 1 desc for context descriptor,
4288 * otherwise try next time */
4289 if (igb_maybe_stop_tx(tx_ring, skb_shinfo(skb)->nr_frags + 4)) {
4290 /* this is a hard error */
4291 return NETDEV_TX_BUSY;
4292 }
4293
4294 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
4295 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
4296 tx_flags |= IGB_TX_FLAGS_TSTAMP;
4297 }
4298
4299 if (vlan_tx_tag_present(skb)) {
4300 tx_flags |= IGB_TX_FLAGS_VLAN;
4301 tx_flags |= (vlan_tx_tag_get(skb) << IGB_TX_FLAGS_VLAN_SHIFT);
4302 }
4303
4304 if (skb->protocol == htons(ETH_P_IP))
4305 tx_flags |= IGB_TX_FLAGS_IPV4;
4306
4307 first = tx_ring->next_to_use;
4308 if (skb_is_gso(skb)) {
4309 tso = igb_tso_adv(tx_ring, skb, tx_flags, &hdr_len);
4310
4311 if (tso < 0) {
4312 dev_kfree_skb_any(skb);
4313 return NETDEV_TX_OK;
4314 }
4315 }
4316
4317 if (tso)
4318 tx_flags |= IGB_TX_FLAGS_TSO;
4319 else if (igb_tx_csum_adv(tx_ring, skb, tx_flags) &&
4320 (skb->ip_summed == CHECKSUM_PARTIAL))
4321 tx_flags |= IGB_TX_FLAGS_CSUM;
4322
4323 /*
4324 * count reflects descriptors mapped, if 0 or less then mapping error
4325 * has occurred and we need to rewind the descriptor queue
4326 */
4327 count = igb_tx_map_adv(tx_ring, skb, first);
4328 if (!count) {
4329 dev_kfree_skb_any(skb);
4330 tx_ring->buffer_info[first].time_stamp = 0;
4331 tx_ring->next_to_use = first;
4332 return NETDEV_TX_OK;
4333 }
4334
4335 igb_tx_queue_adv(tx_ring, tx_flags, count, skb->len, hdr_len);
4336
4337 /* Make sure there is space in the ring for the next send. */
4338 igb_maybe_stop_tx(tx_ring, MAX_SKB_FRAGS + 4);
4339
4340 return NETDEV_TX_OK;
4341 }
4342
4343 static netdev_tx_t igb_xmit_frame_adv(struct sk_buff *skb,
4344 struct net_device *netdev)
4345 {
4346 struct igb_adapter *adapter = netdev_priv(netdev);
4347 struct igb_ring *tx_ring;
4348 int r_idx = 0;
4349
4350 if (test_bit(__IGB_DOWN, &adapter->state)) {
4351 dev_kfree_skb_any(skb);
4352 return NETDEV_TX_OK;
4353 }
4354
4355 if (skb->len <= 0) {
4356 dev_kfree_skb_any(skb);
4357 return NETDEV_TX_OK;
4358 }
4359
4360 r_idx = skb->queue_mapping & (IGB_ABS_MAX_TX_QUEUES - 1);
4361 tx_ring = adapter->multi_tx_table[r_idx];
4362
4363 /* This goes back to the question of how to logically map a tx queue
4364 * to a flow. Right now, performance is impacted slightly negatively
4365 * if using multiple tx queues. If the stack breaks away from a
4366 * single qdisc implementation, we can look at this again. */
4367 return igb_xmit_frame_ring_adv(skb, tx_ring);
4368 }
4369
4370 /**
4371 * igb_tx_timeout - Respond to a Tx Hang
4372 * @netdev: network interface device structure
4373 **/
4374 static void igb_tx_timeout(struct net_device *netdev)
4375 {
4376 struct igb_adapter *adapter = netdev_priv(netdev);
4377 struct e1000_hw *hw = &adapter->hw;
4378
4379 /* Do the reset outside of interrupt context */
4380 adapter->tx_timeout_count++;
4381
4382 if (hw->mac.type == e1000_82580)
4383 hw->dev_spec._82575.global_device_reset = true;
4384
4385 schedule_work(&adapter->reset_task);
4386 wr32(E1000_EICS,
4387 (adapter->eims_enable_mask & ~adapter->eims_other));
4388 }
4389
4390 static void igb_reset_task(struct work_struct *work)
4391 {
4392 struct igb_adapter *adapter;
4393 adapter = container_of(work, struct igb_adapter, reset_task);
4394
4395 igb_dump(adapter);
4396 netdev_err(adapter->netdev, "Reset adapter\n");
4397 igb_reinit_locked(adapter);
4398 }
4399
4400 /**
4401 * igb_get_stats64 - Get System Network Statistics
4402 * @netdev: network interface device structure
4403 * @stats: rtnl_link_stats64 pointer
4404 *
4405 **/
4406 static struct rtnl_link_stats64 *igb_get_stats64(struct net_device *netdev,
4407 struct rtnl_link_stats64 *stats)
4408 {
4409 struct igb_adapter *adapter = netdev_priv(netdev);
4410
4411 spin_lock(&adapter->stats64_lock);
4412 igb_update_stats(adapter, &adapter->stats64);
4413 memcpy(stats, &adapter->stats64, sizeof(*stats));
4414 spin_unlock(&adapter->stats64_lock);
4415
4416 return stats;
4417 }
4418
4419 /**
4420 * igb_change_mtu - Change the Maximum Transfer Unit
4421 * @netdev: network interface device structure
4422 * @new_mtu: new value for maximum frame size
4423 *
4424 * Returns 0 on success, negative on failure
4425 **/
4426 static int igb_change_mtu(struct net_device *netdev, int new_mtu)
4427 {
4428 struct igb_adapter *adapter = netdev_priv(netdev);
4429 struct pci_dev *pdev = adapter->pdev;
4430 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4431 u32 rx_buffer_len, i;
4432
4433 if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) {
4434 dev_err(&pdev->dev, "Invalid MTU setting\n");
4435 return -EINVAL;
4436 }
4437
4438 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
4439 dev_err(&pdev->dev, "MTU > 9216 not supported.\n");
4440 return -EINVAL;
4441 }
4442
4443 while (test_and_set_bit(__IGB_RESETTING, &adapter->state))
4444 msleep(1);
4445
4446 /* igb_down has a dependency on max_frame_size */
4447 adapter->max_frame_size = max_frame;
4448
4449 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
4450 * means we reserve 2 more, this pushes us to allocate from the next
4451 * larger slab size.
4452 * i.e. RXBUFFER_2048 --> size-4096 slab
4453 */
4454
4455 if (adapter->hw.mac.type == e1000_82580)
4456 max_frame += IGB_TS_HDR_LEN;
4457
4458 if (max_frame <= IGB_RXBUFFER_1024)
4459 rx_buffer_len = IGB_RXBUFFER_1024;
4460 else if (max_frame <= MAXIMUM_ETHERNET_VLAN_SIZE)
4461 rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
4462 else
4463 rx_buffer_len = IGB_RXBUFFER_128;
4464
4465 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN + IGB_TS_HDR_LEN) ||
4466 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE + IGB_TS_HDR_LEN))
4467 rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE + IGB_TS_HDR_LEN;
4468
4469 if ((adapter->hw.mac.type == e1000_82580) &&
4470 (rx_buffer_len == IGB_RXBUFFER_128))
4471 rx_buffer_len += IGB_RXBUFFER_64;
4472
4473 if (netif_running(netdev))
4474 igb_down(adapter);
4475
4476 dev_info(&pdev->dev, "changing MTU from %d to %d\n",
4477 netdev->mtu, new_mtu);
4478 netdev->mtu = new_mtu;
4479
4480 for (i = 0; i < adapter->num_rx_queues; i++)
4481 adapter->rx_ring[i]->rx_buffer_len = rx_buffer_len;
4482
4483 if (netif_running(netdev))
4484 igb_up(adapter);
4485 else
4486 igb_reset(adapter);
4487
4488 clear_bit(__IGB_RESETTING, &adapter->state);
4489
4490 return 0;
4491 }
4492
4493 /**
4494 * igb_update_stats - Update the board statistics counters
4495 * @adapter: board private structure
4496 **/
4497
4498 void igb_update_stats(struct igb_adapter *adapter,
4499 struct rtnl_link_stats64 *net_stats)
4500 {
4501 struct e1000_hw *hw = &adapter->hw;
4502 struct pci_dev *pdev = adapter->pdev;
4503 u32 reg, mpc;
4504 u16 phy_tmp;
4505 int i;
4506 u64 bytes, packets;
4507 unsigned int start;
4508 u64 _bytes, _packets;
4509
4510 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
4511
4512 /*
4513 * Prevent stats update while adapter is being reset, or if the pci
4514 * connection is down.
4515 */
4516 if (adapter->link_speed == 0)
4517 return;
4518 if (pci_channel_offline(pdev))
4519 return;
4520
4521 bytes = 0;
4522 packets = 0;
4523 for (i = 0; i < adapter->num_rx_queues; i++) {
4524 u32 rqdpc_tmp = rd32(E1000_RQDPC(i)) & 0x0FFF;
4525 struct igb_ring *ring = adapter->rx_ring[i];
4526
4527 ring->rx_stats.drops += rqdpc_tmp;
4528 net_stats->rx_fifo_errors += rqdpc_tmp;
4529
4530 do {
4531 start = u64_stats_fetch_begin_bh(&ring->rx_syncp);
4532 _bytes = ring->rx_stats.bytes;
4533 _packets = ring->rx_stats.packets;
4534 } while (u64_stats_fetch_retry_bh(&ring->rx_syncp, start));
4535 bytes += _bytes;
4536 packets += _packets;
4537 }
4538
4539 net_stats->rx_bytes = bytes;
4540 net_stats->rx_packets = packets;
4541
4542 bytes = 0;
4543 packets = 0;
4544 for (i = 0; i < adapter->num_tx_queues; i++) {
4545 struct igb_ring *ring = adapter->tx_ring[i];
4546 do {
4547 start = u64_stats_fetch_begin_bh(&ring->tx_syncp);
4548 _bytes = ring->tx_stats.bytes;
4549 _packets = ring->tx_stats.packets;
4550 } while (u64_stats_fetch_retry_bh(&ring->tx_syncp, start));
4551 bytes += _bytes;
4552 packets += _packets;
4553 }
4554 net_stats->tx_bytes = bytes;
4555 net_stats->tx_packets = packets;
4556
4557 /* read stats registers */
4558 adapter->stats.crcerrs += rd32(E1000_CRCERRS);
4559 adapter->stats.gprc += rd32(E1000_GPRC);
4560 adapter->stats.gorc += rd32(E1000_GORCL);
4561 rd32(E1000_GORCH); /* clear GORCL */
4562 adapter->stats.bprc += rd32(E1000_BPRC);
4563 adapter->stats.mprc += rd32(E1000_MPRC);
4564 adapter->stats.roc += rd32(E1000_ROC);
4565
4566 adapter->stats.prc64 += rd32(E1000_PRC64);
4567 adapter->stats.prc127 += rd32(E1000_PRC127);
4568 adapter->stats.prc255 += rd32(E1000_PRC255);
4569 adapter->stats.prc511 += rd32(E1000_PRC511);
4570 adapter->stats.prc1023 += rd32(E1000_PRC1023);
4571 adapter->stats.prc1522 += rd32(E1000_PRC1522);
4572 adapter->stats.symerrs += rd32(E1000_SYMERRS);
4573 adapter->stats.sec += rd32(E1000_SEC);
4574
4575 mpc = rd32(E1000_MPC);
4576 adapter->stats.mpc += mpc;
4577 net_stats->rx_fifo_errors += mpc;
4578 adapter->stats.scc += rd32(E1000_SCC);
4579 adapter->stats.ecol += rd32(E1000_ECOL);
4580 adapter->stats.mcc += rd32(E1000_MCC);
4581 adapter->stats.latecol += rd32(E1000_LATECOL);
4582 adapter->stats.dc += rd32(E1000_DC);
4583 adapter->stats.rlec += rd32(E1000_RLEC);
4584 adapter->stats.xonrxc += rd32(E1000_XONRXC);
4585 adapter->stats.xontxc += rd32(E1000_XONTXC);
4586 adapter->stats.xoffrxc += rd32(E1000_XOFFRXC);
4587 adapter->stats.xofftxc += rd32(E1000_XOFFTXC);
4588 adapter->stats.fcruc += rd32(E1000_FCRUC);
4589 adapter->stats.gptc += rd32(E1000_GPTC);
4590 adapter->stats.gotc += rd32(E1000_GOTCL);
4591 rd32(E1000_GOTCH); /* clear GOTCL */
4592 adapter->stats.rnbc += rd32(E1000_RNBC);
4593 adapter->stats.ruc += rd32(E1000_RUC);
4594 adapter->stats.rfc += rd32(E1000_RFC);
4595 adapter->stats.rjc += rd32(E1000_RJC);
4596 adapter->stats.tor += rd32(E1000_TORH);
4597 adapter->stats.tot += rd32(E1000_TOTH);
4598 adapter->stats.tpr += rd32(E1000_TPR);
4599
4600 adapter->stats.ptc64 += rd32(E1000_PTC64);
4601 adapter->stats.ptc127 += rd32(E1000_PTC127);
4602 adapter->stats.ptc255 += rd32(E1000_PTC255);
4603 adapter->stats.ptc511 += rd32(E1000_PTC511);
4604 adapter->stats.ptc1023 += rd32(E1000_PTC1023);
4605 adapter->stats.ptc1522 += rd32(E1000_PTC1522);
4606
4607 adapter->stats.mptc += rd32(E1000_MPTC);
4608 adapter->stats.bptc += rd32(E1000_BPTC);
4609
4610 adapter->stats.tpt += rd32(E1000_TPT);
4611 adapter->stats.colc += rd32(E1000_COLC);
4612
4613 adapter->stats.algnerrc += rd32(E1000_ALGNERRC);
4614 /* read internal phy specific stats */
4615 reg = rd32(E1000_CTRL_EXT);
4616 if (!(reg & E1000_CTRL_EXT_LINK_MODE_MASK)) {
4617 adapter->stats.rxerrc += rd32(E1000_RXERRC);
4618 adapter->stats.tncrs += rd32(E1000_TNCRS);
4619 }
4620
4621 adapter->stats.tsctc += rd32(E1000_TSCTC);
4622 adapter->stats.tsctfc += rd32(E1000_TSCTFC);
4623
4624 adapter->stats.iac += rd32(E1000_IAC);
4625 adapter->stats.icrxoc += rd32(E1000_ICRXOC);
4626 adapter->stats.icrxptc += rd32(E1000_ICRXPTC);
4627 adapter->stats.icrxatc += rd32(E1000_ICRXATC);
4628 adapter->stats.ictxptc += rd32(E1000_ICTXPTC);
4629 adapter->stats.ictxatc += rd32(E1000_ICTXATC);
4630 adapter->stats.ictxqec += rd32(E1000_ICTXQEC);
4631 adapter->stats.ictxqmtc += rd32(E1000_ICTXQMTC);
4632 adapter->stats.icrxdmtc += rd32(E1000_ICRXDMTC);
4633
4634 /* Fill out the OS statistics structure */
4635 net_stats->multicast = adapter->stats.mprc;
4636 net_stats->collisions = adapter->stats.colc;
4637
4638 /* Rx Errors */
4639
4640 /* RLEC on some newer hardware can be incorrect so build
4641 * our own version based on RUC and ROC */
4642 net_stats->rx_errors = adapter->stats.rxerrc +
4643 adapter->stats.crcerrs + adapter->stats.algnerrc +
4644 adapter->stats.ruc + adapter->stats.roc +
4645 adapter->stats.cexterr;
4646 net_stats->rx_length_errors = adapter->stats.ruc +
4647 adapter->stats.roc;
4648 net_stats->rx_crc_errors = adapter->stats.crcerrs;
4649 net_stats->rx_frame_errors = adapter->stats.algnerrc;
4650 net_stats->rx_missed_errors = adapter->stats.mpc;
4651
4652 /* Tx Errors */
4653 net_stats->tx_errors = adapter->stats.ecol +
4654 adapter->stats.latecol;
4655 net_stats->tx_aborted_errors = adapter->stats.ecol;
4656 net_stats->tx_window_errors = adapter->stats.latecol;
4657 net_stats->tx_carrier_errors = adapter->stats.tncrs;
4658
4659 /* Tx Dropped needs to be maintained elsewhere */
4660
4661 /* Phy Stats */
4662 if (hw->phy.media_type == e1000_media_type_copper) {
4663 if ((adapter->link_speed == SPEED_1000) &&
4664 (!igb_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
4665 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
4666 adapter->phy_stats.idle_errors += phy_tmp;
4667 }
4668 }
4669
4670 /* Management Stats */
4671 adapter->stats.mgptc += rd32(E1000_MGTPTC);
4672 adapter->stats.mgprc += rd32(E1000_MGTPRC);
4673 adapter->stats.mgpdc += rd32(E1000_MGTPDC);
4674
4675 /* OS2BMC Stats */
4676 reg = rd32(E1000_MANC);
4677 if (reg & E1000_MANC_EN_BMC2OS) {
4678 adapter->stats.o2bgptc += rd32(E1000_O2BGPTC);
4679 adapter->stats.o2bspc += rd32(E1000_O2BSPC);
4680 adapter->stats.b2ospc += rd32(E1000_B2OSPC);
4681 adapter->stats.b2ogprc += rd32(E1000_B2OGPRC);
4682 }
4683 }
4684
4685 static irqreturn_t igb_msix_other(int irq, void *data)
4686 {
4687 struct igb_adapter *adapter = data;
4688 struct e1000_hw *hw = &adapter->hw;
4689 u32 icr = rd32(E1000_ICR);
4690 /* reading ICR causes bit 31 of EICR to be cleared */
4691
4692 if (icr & E1000_ICR_DRSTA)
4693 schedule_work(&adapter->reset_task);
4694
4695 if (icr & E1000_ICR_DOUTSYNC) {
4696 /* HW is reporting DMA is out of sync */
4697 adapter->stats.doosync++;
4698 /* The DMA Out of Sync is also indication of a spoof event
4699 * in IOV mode. Check the Wrong VM Behavior register to
4700 * see if it is really a spoof event. */
4701 igb_check_wvbr(adapter);
4702 }
4703
4704 /* Check for a mailbox event */
4705 if (icr & E1000_ICR_VMMB)
4706 igb_msg_task(adapter);
4707
4708 if (icr & E1000_ICR_LSC) {
4709 hw->mac.get_link_status = 1;
4710 /* guard against interrupt when we're going down */
4711 if (!test_bit(__IGB_DOWN, &adapter->state))
4712 mod_timer(&adapter->watchdog_timer, jiffies + 1);
4713 }
4714
4715 if (adapter->vfs_allocated_count)
4716 wr32(E1000_IMS, E1000_IMS_LSC |
4717 E1000_IMS_VMMB |
4718 E1000_IMS_DOUTSYNC);
4719 else
4720 wr32(E1000_IMS, E1000_IMS_LSC | E1000_IMS_DOUTSYNC);
4721 wr32(E1000_EIMS, adapter->eims_other);
4722
4723 return IRQ_HANDLED;
4724 }
4725
4726 static void igb_write_itr(struct igb_q_vector *q_vector)
4727 {
4728 struct igb_adapter *adapter = q_vector->adapter;
4729 u32 itr_val = q_vector->itr_val & 0x7FFC;
4730
4731 if (!q_vector->set_itr)
4732 return;
4733
4734 if (!itr_val)
4735 itr_val = 0x4;
4736
4737 if (adapter->hw.mac.type == e1000_82575)
4738 itr_val |= itr_val << 16;
4739 else
4740 itr_val |= 0x8000000;
4741
4742 writel(itr_val, q_vector->itr_register);
4743 q_vector->set_itr = 0;
4744 }
4745
4746 static irqreturn_t igb_msix_ring(int irq, void *data)
4747 {
4748 struct igb_q_vector *q_vector = data;
4749
4750 /* Write the ITR value calculated from the previous interrupt. */
4751 igb_write_itr(q_vector);
4752
4753 napi_schedule(&q_vector->napi);
4754
4755 return IRQ_HANDLED;
4756 }
4757
4758 #ifdef CONFIG_IGB_DCA
4759 static void igb_update_dca(struct igb_q_vector *q_vector)
4760 {
4761 struct igb_adapter *adapter = q_vector->adapter;
4762 struct e1000_hw *hw = &adapter->hw;
4763 int cpu = get_cpu();
4764
4765 if (q_vector->cpu == cpu)
4766 goto out_no_update;
4767
4768 if (q_vector->tx_ring) {
4769 int q = q_vector->tx_ring->reg_idx;
4770 u32 dca_txctrl = rd32(E1000_DCA_TXCTRL(q));
4771 if (hw->mac.type == e1000_82575) {
4772 dca_txctrl &= ~E1000_DCA_TXCTRL_CPUID_MASK;
4773 dca_txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
4774 } else {
4775 dca_txctrl &= ~E1000_DCA_TXCTRL_CPUID_MASK_82576;
4776 dca_txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu) <<
4777 E1000_DCA_TXCTRL_CPUID_SHIFT;
4778 }
4779 dca_txctrl |= E1000_DCA_TXCTRL_DESC_DCA_EN;
4780 wr32(E1000_DCA_TXCTRL(q), dca_txctrl);
4781 }
4782 if (q_vector->rx_ring) {
4783 int q = q_vector->rx_ring->reg_idx;
4784 u32 dca_rxctrl = rd32(E1000_DCA_RXCTRL(q));
4785 if (hw->mac.type == e1000_82575) {
4786 dca_rxctrl &= ~E1000_DCA_RXCTRL_CPUID_MASK;
4787 dca_rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
4788 } else {
4789 dca_rxctrl &= ~E1000_DCA_RXCTRL_CPUID_MASK_82576;
4790 dca_rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu) <<
4791 E1000_DCA_RXCTRL_CPUID_SHIFT;
4792 }
4793 dca_rxctrl |= E1000_DCA_RXCTRL_DESC_DCA_EN;
4794 dca_rxctrl |= E1000_DCA_RXCTRL_HEAD_DCA_EN;
4795 dca_rxctrl |= E1000_DCA_RXCTRL_DATA_DCA_EN;
4796 wr32(E1000_DCA_RXCTRL(q), dca_rxctrl);
4797 }
4798 q_vector->cpu = cpu;
4799 out_no_update:
4800 put_cpu();
4801 }
4802
4803 static void igb_setup_dca(struct igb_adapter *adapter)
4804 {
4805 struct e1000_hw *hw = &adapter->hw;
4806 int i;
4807
4808 if (!(adapter->flags & IGB_FLAG_DCA_ENABLED))
4809 return;
4810
4811 /* Always use CB2 mode, difference is masked in the CB driver. */
4812 wr32(E1000_DCA_CTRL, E1000_DCA_CTRL_DCA_MODE_CB2);
4813
4814 for (i = 0; i < adapter->num_q_vectors; i++) {
4815 adapter->q_vector[i]->cpu = -1;
4816 igb_update_dca(adapter->q_vector[i]);
4817 }
4818 }
4819
4820 static int __igb_notify_dca(struct device *dev, void *data)
4821 {
4822 struct net_device *netdev = dev_get_drvdata(dev);
4823 struct igb_adapter *adapter = netdev_priv(netdev);
4824 struct pci_dev *pdev = adapter->pdev;
4825 struct e1000_hw *hw = &adapter->hw;
4826 unsigned long event = *(unsigned long *)data;
4827
4828 switch (event) {
4829 case DCA_PROVIDER_ADD:
4830 /* if already enabled, don't do it again */
4831 if (adapter->flags & IGB_FLAG_DCA_ENABLED)
4832 break;
4833 if (dca_add_requester(dev) == 0) {
4834 adapter->flags |= IGB_FLAG_DCA_ENABLED;
4835 dev_info(&pdev->dev, "DCA enabled\n");
4836 igb_setup_dca(adapter);
4837 break;
4838 }
4839 /* Fall Through since DCA is disabled. */
4840 case DCA_PROVIDER_REMOVE:
4841 if (adapter->flags & IGB_FLAG_DCA_ENABLED) {
4842 /* without this a class_device is left
4843 * hanging around in the sysfs model */
4844 dca_remove_requester(dev);
4845 dev_info(&pdev->dev, "DCA disabled\n");
4846 adapter->flags &= ~IGB_FLAG_DCA_ENABLED;
4847 wr32(E1000_DCA_CTRL, E1000_DCA_CTRL_DCA_MODE_DISABLE);
4848 }
4849 break;
4850 }
4851
4852 return 0;
4853 }
4854
4855 static int igb_notify_dca(struct notifier_block *nb, unsigned long event,
4856 void *p)
4857 {
4858 int ret_val;
4859
4860 ret_val = driver_for_each_device(&igb_driver.driver, NULL, &event,
4861 __igb_notify_dca);
4862
4863 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
4864 }
4865 #endif /* CONFIG_IGB_DCA */
4866
4867 static void igb_ping_all_vfs(struct igb_adapter *adapter)
4868 {
4869 struct e1000_hw *hw = &adapter->hw;
4870 u32 ping;
4871 int i;
4872
4873 for (i = 0 ; i < adapter->vfs_allocated_count; i++) {
4874 ping = E1000_PF_CONTROL_MSG;
4875 if (adapter->vf_data[i].flags & IGB_VF_FLAG_CTS)
4876 ping |= E1000_VT_MSGTYPE_CTS;
4877 igb_write_mbx(hw, &ping, 1, i);
4878 }
4879 }
4880
4881 static int igb_set_vf_promisc(struct igb_adapter *adapter, u32 *msgbuf, u32 vf)
4882 {
4883 struct e1000_hw *hw = &adapter->hw;
4884 u32 vmolr = rd32(E1000_VMOLR(vf));
4885 struct vf_data_storage *vf_data = &adapter->vf_data[vf];
4886
4887 vf_data->flags &= ~(IGB_VF_FLAG_UNI_PROMISC |
4888 IGB_VF_FLAG_MULTI_PROMISC);
4889 vmolr &= ~(E1000_VMOLR_ROPE | E1000_VMOLR_ROMPE | E1000_VMOLR_MPME);
4890
4891 if (*msgbuf & E1000_VF_SET_PROMISC_MULTICAST) {
4892 vmolr |= E1000_VMOLR_MPME;
4893 vf_data->flags |= IGB_VF_FLAG_MULTI_PROMISC;
4894 *msgbuf &= ~E1000_VF_SET_PROMISC_MULTICAST;
4895 } else {
4896 /*
4897 * if we have hashes and we are clearing a multicast promisc
4898 * flag we need to write the hashes to the MTA as this step
4899 * was previously skipped
4900 */
4901 if (vf_data->num_vf_mc_hashes > 30) {
4902 vmolr |= E1000_VMOLR_MPME;
4903 } else if (vf_data->num_vf_mc_hashes) {
4904 int j;
4905 vmolr |= E1000_VMOLR_ROMPE;
4906 for (j = 0; j < vf_data->num_vf_mc_hashes; j++)
4907 igb_mta_set(hw, vf_data->vf_mc_hashes[j]);
4908 }
4909 }
4910
4911 wr32(E1000_VMOLR(vf), vmolr);
4912
4913 /* there are flags left unprocessed, likely not supported */
4914 if (*msgbuf & E1000_VT_MSGINFO_MASK)
4915 return -EINVAL;
4916
4917 return 0;
4918
4919 }
4920
4921 static int igb_set_vf_multicasts(struct igb_adapter *adapter,
4922 u32 *msgbuf, u32 vf)
4923 {
4924 int n = (msgbuf[0] & E1000_VT_MSGINFO_MASK) >> E1000_VT_MSGINFO_SHIFT;
4925 u16 *hash_list = (u16 *)&msgbuf[1];
4926 struct vf_data_storage *vf_data = &adapter->vf_data[vf];
4927 int i;
4928
4929 /* salt away the number of multicast addresses assigned
4930 * to this VF for later use to restore when the PF multi cast
4931 * list changes
4932 */
4933 vf_data->num_vf_mc_hashes = n;
4934
4935 /* only up to 30 hash values supported */
4936 if (n > 30)
4937 n = 30;
4938
4939 /* store the hashes for later use */
4940 for (i = 0; i < n; i++)
4941 vf_data->vf_mc_hashes[i] = hash_list[i];
4942
4943 /* Flush and reset the mta with the new values */
4944 igb_set_rx_mode(adapter->netdev);
4945
4946 return 0;
4947 }
4948
4949 static void igb_restore_vf_multicasts(struct igb_adapter *adapter)
4950 {
4951 struct e1000_hw *hw = &adapter->hw;
4952 struct vf_data_storage *vf_data;
4953 int i, j;
4954
4955 for (i = 0; i < adapter->vfs_allocated_count; i++) {
4956 u32 vmolr = rd32(E1000_VMOLR(i));
4957 vmolr &= ~(E1000_VMOLR_ROMPE | E1000_VMOLR_MPME);
4958
4959 vf_data = &adapter->vf_data[i];
4960
4961 if ((vf_data->num_vf_mc_hashes > 30) ||
4962 (vf_data->flags & IGB_VF_FLAG_MULTI_PROMISC)) {
4963 vmolr |= E1000_VMOLR_MPME;
4964 } else if (vf_data->num_vf_mc_hashes) {
4965 vmolr |= E1000_VMOLR_ROMPE;
4966 for (j = 0; j < vf_data->num_vf_mc_hashes; j++)
4967 igb_mta_set(hw, vf_data->vf_mc_hashes[j]);
4968 }
4969 wr32(E1000_VMOLR(i), vmolr);
4970 }
4971 }
4972
4973 static void igb_clear_vf_vfta(struct igb_adapter *adapter, u32 vf)
4974 {
4975 struct e1000_hw *hw = &adapter->hw;
4976 u32 pool_mask, reg, vid;
4977 int i;
4978
4979 pool_mask = 1 << (E1000_VLVF_POOLSEL_SHIFT + vf);
4980
4981 /* Find the vlan filter for this id */
4982 for (i = 0; i < E1000_VLVF_ARRAY_SIZE; i++) {
4983 reg = rd32(E1000_VLVF(i));
4984
4985 /* remove the vf from the pool */
4986 reg &= ~pool_mask;
4987
4988 /* if pool is empty then remove entry from vfta */
4989 if (!(reg & E1000_VLVF_POOLSEL_MASK) &&
4990 (reg & E1000_VLVF_VLANID_ENABLE)) {
4991 reg = 0;
4992 vid = reg & E1000_VLVF_VLANID_MASK;
4993 igb_vfta_set(hw, vid, false);
4994 }
4995
4996 wr32(E1000_VLVF(i), reg);
4997 }
4998
4999 adapter->vf_data[vf].vlans_enabled = 0;
5000 }
5001
5002 static s32 igb_vlvf_set(struct igb_adapter *adapter, u32 vid, bool add, u32 vf)
5003 {
5004 struct e1000_hw *hw = &adapter->hw;
5005 u32 reg, i;
5006
5007 /* The vlvf table only exists on 82576 hardware and newer */
5008 if (hw->mac.type < e1000_82576)
5009 return -1;
5010
5011 /* we only need to do this if VMDq is enabled */
5012 if (!adapter->vfs_allocated_count)
5013 return -1;
5014
5015 /* Find the vlan filter for this id */
5016 for (i = 0; i < E1000_VLVF_ARRAY_SIZE; i++) {
5017 reg = rd32(E1000_VLVF(i));
5018 if ((reg & E1000_VLVF_VLANID_ENABLE) &&
5019 vid == (reg & E1000_VLVF_VLANID_MASK))
5020 break;
5021 }
5022
5023 if (add) {
5024 if (i == E1000_VLVF_ARRAY_SIZE) {
5025 /* Did not find a matching VLAN ID entry that was
5026 * enabled. Search for a free filter entry, i.e.
5027 * one without the enable bit set
5028 */
5029 for (i = 0; i < E1000_VLVF_ARRAY_SIZE; i++) {
5030 reg = rd32(E1000_VLVF(i));
5031 if (!(reg & E1000_VLVF_VLANID_ENABLE))
5032 break;
5033 }
5034 }
5035 if (i < E1000_VLVF_ARRAY_SIZE) {
5036 /* Found an enabled/available entry */
5037 reg |= 1 << (E1000_VLVF_POOLSEL_SHIFT + vf);
5038
5039 /* if !enabled we need to set this up in vfta */
5040 if (!(reg & E1000_VLVF_VLANID_ENABLE)) {
5041 /* add VID to filter table */
5042 igb_vfta_set(hw, vid, true);
5043 reg |= E1000_VLVF_VLANID_ENABLE;
5044 }
5045 reg &= ~E1000_VLVF_VLANID_MASK;
5046 reg |= vid;
5047 wr32(E1000_VLVF(i), reg);
5048
5049 /* do not modify RLPML for PF devices */
5050 if (vf >= adapter->vfs_allocated_count)
5051 return 0;
5052
5053 if (!adapter->vf_data[vf].vlans_enabled) {
5054 u32 size;
5055 reg = rd32(E1000_VMOLR(vf));
5056 size = reg & E1000_VMOLR_RLPML_MASK;
5057 size += 4;
5058 reg &= ~E1000_VMOLR_RLPML_MASK;
5059 reg |= size;
5060 wr32(E1000_VMOLR(vf), reg);
5061 }
5062
5063 adapter->vf_data[vf].vlans_enabled++;
5064 return 0;
5065 }
5066 } else {
5067 if (i < E1000_VLVF_ARRAY_SIZE) {
5068 /* remove vf from the pool */
5069 reg &= ~(1 << (E1000_VLVF_POOLSEL_SHIFT + vf));
5070 /* if pool is empty then remove entry from vfta */
5071 if (!(reg & E1000_VLVF_POOLSEL_MASK)) {
5072 reg = 0;
5073 igb_vfta_set(hw, vid, false);
5074 }
5075 wr32(E1000_VLVF(i), reg);
5076
5077 /* do not modify RLPML for PF devices */
5078 if (vf >= adapter->vfs_allocated_count)
5079 return 0;
5080
5081 adapter->vf_data[vf].vlans_enabled--;
5082 if (!adapter->vf_data[vf].vlans_enabled) {
5083 u32 size;
5084 reg = rd32(E1000_VMOLR(vf));
5085 size = reg & E1000_VMOLR_RLPML_MASK;
5086 size -= 4;
5087 reg &= ~E1000_VMOLR_RLPML_MASK;
5088 reg |= size;
5089 wr32(E1000_VMOLR(vf), reg);
5090 }
5091 }
5092 }
5093 return 0;
5094 }
5095
5096 static void igb_set_vmvir(struct igb_adapter *adapter, u32 vid, u32 vf)
5097 {
5098 struct e1000_hw *hw = &adapter->hw;
5099
5100 if (vid)
5101 wr32(E1000_VMVIR(vf), (vid | E1000_VMVIR_VLANA_DEFAULT));
5102 else
5103 wr32(E1000_VMVIR(vf), 0);
5104 }
5105
5106 static int igb_ndo_set_vf_vlan(struct net_device *netdev,
5107 int vf, u16 vlan, u8 qos)
5108 {
5109 int err = 0;
5110 struct igb_adapter *adapter = netdev_priv(netdev);
5111
5112 if ((vf >= adapter->vfs_allocated_count) || (vlan > 4095) || (qos > 7))
5113 return -EINVAL;
5114 if (vlan || qos) {
5115 err = igb_vlvf_set(adapter, vlan, !!vlan, vf);
5116 if (err)
5117 goto out;
5118 igb_set_vmvir(adapter, vlan | (qos << VLAN_PRIO_SHIFT), vf);
5119 igb_set_vmolr(adapter, vf, !vlan);
5120 adapter->vf_data[vf].pf_vlan = vlan;
5121 adapter->vf_data[vf].pf_qos = qos;
5122 dev_info(&adapter->pdev->dev,
5123 "Setting VLAN %d, QOS 0x%x on VF %d\n", vlan, qos, vf);
5124 if (test_bit(__IGB_DOWN, &adapter->state)) {
5125 dev_warn(&adapter->pdev->dev,
5126 "The VF VLAN has been set,"
5127 " but the PF device is not up.\n");
5128 dev_warn(&adapter->pdev->dev,
5129 "Bring the PF device up before"
5130 " attempting to use the VF device.\n");
5131 }
5132 } else {
5133 igb_vlvf_set(adapter, adapter->vf_data[vf].pf_vlan,
5134 false, vf);
5135 igb_set_vmvir(adapter, vlan, vf);
5136 igb_set_vmolr(adapter, vf, true);
5137 adapter->vf_data[vf].pf_vlan = 0;
5138 adapter->vf_data[vf].pf_qos = 0;
5139 }
5140 out:
5141 return err;
5142 }
5143
5144 static int igb_set_vf_vlan(struct igb_adapter *adapter, u32 *msgbuf, u32 vf)
5145 {
5146 int add = (msgbuf[0] & E1000_VT_MSGINFO_MASK) >> E1000_VT_MSGINFO_SHIFT;
5147 int vid = (msgbuf[1] & E1000_VLVF_VLANID_MASK);
5148
5149 return igb_vlvf_set(adapter, vid, add, vf);
5150 }
5151
5152 static inline void igb_vf_reset(struct igb_adapter *adapter, u32 vf)
5153 {
5154 /* clear flags - except flag that indicates PF has set the MAC */
5155 adapter->vf_data[vf].flags &= IGB_VF_FLAG_PF_SET_MAC;
5156 adapter->vf_data[vf].last_nack = jiffies;
5157
5158 /* reset offloads to defaults */
5159 igb_set_vmolr(adapter, vf, true);
5160
5161 /* reset vlans for device */
5162 igb_clear_vf_vfta(adapter, vf);
5163 if (adapter->vf_data[vf].pf_vlan)
5164 igb_ndo_set_vf_vlan(adapter->netdev, vf,
5165 adapter->vf_data[vf].pf_vlan,
5166 adapter->vf_data[vf].pf_qos);
5167 else
5168 igb_clear_vf_vfta(adapter, vf);
5169
5170 /* reset multicast table array for vf */
5171 adapter->vf_data[vf].num_vf_mc_hashes = 0;
5172
5173 /* Flush and reset the mta with the new values */
5174 igb_set_rx_mode(adapter->netdev);
5175 }
5176
5177 static void igb_vf_reset_event(struct igb_adapter *adapter, u32 vf)
5178 {
5179 unsigned char *vf_mac = adapter->vf_data[vf].vf_mac_addresses;
5180
5181 /* generate a new mac address as we were hotplug removed/added */
5182 if (!(adapter->vf_data[vf].flags & IGB_VF_FLAG_PF_SET_MAC))
5183 random_ether_addr(vf_mac);
5184
5185 /* process remaining reset events */
5186 igb_vf_reset(adapter, vf);
5187 }
5188
5189 static void igb_vf_reset_msg(struct igb_adapter *adapter, u32 vf)
5190 {
5191 struct e1000_hw *hw = &adapter->hw;
5192 unsigned char *vf_mac = adapter->vf_data[vf].vf_mac_addresses;
5193 int rar_entry = hw->mac.rar_entry_count - (vf + 1);
5194 u32 reg, msgbuf[3];
5195 u8 *addr = (u8 *)(&msgbuf[1]);
5196
5197 /* process all the same items cleared in a function level reset */
5198 igb_vf_reset(adapter, vf);
5199
5200 /* set vf mac address */
5201 igb_rar_set_qsel(adapter, vf_mac, rar_entry, vf);
5202
5203 /* enable transmit and receive for vf */
5204 reg = rd32(E1000_VFTE);
5205 wr32(E1000_VFTE, reg | (1 << vf));
5206 reg = rd32(E1000_VFRE);
5207 wr32(E1000_VFRE, reg | (1 << vf));
5208
5209 adapter->vf_data[vf].flags |= IGB_VF_FLAG_CTS;
5210
5211 /* reply to reset with ack and vf mac address */
5212 msgbuf[0] = E1000_VF_RESET | E1000_VT_MSGTYPE_ACK;
5213 memcpy(addr, vf_mac, 6);
5214 igb_write_mbx(hw, msgbuf, 3, vf);
5215 }
5216
5217 static int igb_set_vf_mac_addr(struct igb_adapter *adapter, u32 *msg, int vf)
5218 {
5219 /*
5220 * The VF MAC Address is stored in a packed array of bytes
5221 * starting at the second 32 bit word of the msg array
5222 */
5223 unsigned char *addr = (char *)&msg[1];
5224 int err = -1;
5225
5226 if (is_valid_ether_addr(addr))
5227 err = igb_set_vf_mac(adapter, vf, addr);
5228
5229 return err;
5230 }
5231
5232 static void igb_rcv_ack_from_vf(struct igb_adapter *adapter, u32 vf)
5233 {
5234 struct e1000_hw *hw = &adapter->hw;
5235 struct vf_data_storage *vf_data = &adapter->vf_data[vf];
5236 u32 msg = E1000_VT_MSGTYPE_NACK;
5237
5238 /* if device isn't clear to send it shouldn't be reading either */
5239 if (!(vf_data->flags & IGB_VF_FLAG_CTS) &&
5240 time_after(jiffies, vf_data->last_nack + (2 * HZ))) {
5241 igb_write_mbx(hw, &msg, 1, vf);
5242 vf_data->last_nack = jiffies;
5243 }
5244 }
5245
5246 static void igb_rcv_msg_from_vf(struct igb_adapter *adapter, u32 vf)
5247 {
5248 struct pci_dev *pdev = adapter->pdev;
5249 u32 msgbuf[E1000_VFMAILBOX_SIZE];
5250 struct e1000_hw *hw = &adapter->hw;
5251 struct vf_data_storage *vf_data = &adapter->vf_data[vf];
5252 s32 retval;
5253
5254 retval = igb_read_mbx(hw, msgbuf, E1000_VFMAILBOX_SIZE, vf);
5255
5256 if (retval) {
5257 /* if receive failed revoke VF CTS stats and restart init */
5258 dev_err(&pdev->dev, "Error receiving message from VF\n");
5259 vf_data->flags &= ~IGB_VF_FLAG_CTS;
5260 if (!time_after(jiffies, vf_data->last_nack + (2 * HZ)))
5261 return;
5262 goto out;
5263 }
5264
5265 /* this is a message we already processed, do nothing */
5266 if (msgbuf[0] & (E1000_VT_MSGTYPE_ACK | E1000_VT_MSGTYPE_NACK))
5267 return;
5268
5269 /*
5270 * until the vf completes a reset it should not be
5271 * allowed to start any configuration.
5272 */
5273
5274 if (msgbuf[0] == E1000_VF_RESET) {
5275 igb_vf_reset_msg(adapter, vf);
5276 return;
5277 }
5278
5279 if (!(vf_data->flags & IGB_VF_FLAG_CTS)) {
5280 if (!time_after(jiffies, vf_data->last_nack + (2 * HZ)))
5281 return;
5282 retval = -1;
5283 goto out;
5284 }
5285
5286 switch ((msgbuf[0] & 0xFFFF)) {
5287 case E1000_VF_SET_MAC_ADDR:
5288 retval = -EINVAL;
5289 if (!(vf_data->flags & IGB_VF_FLAG_PF_SET_MAC))
5290 retval = igb_set_vf_mac_addr(adapter, msgbuf, vf);
5291 else
5292 dev_warn(&pdev->dev,
5293 "VF %d attempted to override administratively "
5294 "set MAC address\nReload the VF driver to "
5295 "resume operations\n", vf);
5296 break;
5297 case E1000_VF_SET_PROMISC:
5298 retval = igb_set_vf_promisc(adapter, msgbuf, vf);
5299 break;
5300 case E1000_VF_SET_MULTICAST:
5301 retval = igb_set_vf_multicasts(adapter, msgbuf, vf);
5302 break;
5303 case E1000_VF_SET_LPE:
5304 retval = igb_set_vf_rlpml(adapter, msgbuf[1], vf);
5305 break;
5306 case E1000_VF_SET_VLAN:
5307 retval = -1;
5308 if (vf_data->pf_vlan)
5309 dev_warn(&pdev->dev,
5310 "VF %d attempted to override administratively "
5311 "set VLAN tag\nReload the VF driver to "
5312 "resume operations\n", vf);
5313 else
5314 retval = igb_set_vf_vlan(adapter, msgbuf, vf);
5315 break;
5316 default:
5317 dev_err(&pdev->dev, "Unhandled Msg %08x\n", msgbuf[0]);
5318 retval = -1;
5319 break;
5320 }
5321
5322 msgbuf[0] |= E1000_VT_MSGTYPE_CTS;
5323 out:
5324 /* notify the VF of the results of what it sent us */
5325 if (retval)
5326 msgbuf[0] |= E1000_VT_MSGTYPE_NACK;
5327 else
5328 msgbuf[0] |= E1000_VT_MSGTYPE_ACK;
5329
5330 igb_write_mbx(hw, msgbuf, 1, vf);
5331 }
5332
5333 static void igb_msg_task(struct igb_adapter *adapter)
5334 {
5335 struct e1000_hw *hw = &adapter->hw;
5336 u32 vf;
5337
5338 for (vf = 0; vf < adapter->vfs_allocated_count; vf++) {
5339 /* process any reset requests */
5340 if (!igb_check_for_rst(hw, vf))
5341 igb_vf_reset_event(adapter, vf);
5342
5343 /* process any messages pending */
5344 if (!igb_check_for_msg(hw, vf))
5345 igb_rcv_msg_from_vf(adapter, vf);
5346
5347 /* process any acks */
5348 if (!igb_check_for_ack(hw, vf))
5349 igb_rcv_ack_from_vf(adapter, vf);
5350 }
5351 }
5352
5353 /**
5354 * igb_set_uta - Set unicast filter table address
5355 * @adapter: board private structure
5356 *
5357 * The unicast table address is a register array of 32-bit registers.
5358 * The table is meant to be used in a way similar to how the MTA is used
5359 * however due to certain limitations in the hardware it is necessary to
5360 * set all the hash bits to 1 and use the VMOLR ROPE bit as a promiscuous
5361 * enable bit to allow vlan tag stripping when promiscuous mode is enabled
5362 **/
5363 static void igb_set_uta(struct igb_adapter *adapter)
5364 {
5365 struct e1000_hw *hw = &adapter->hw;
5366 int i;
5367
5368 /* The UTA table only exists on 82576 hardware and newer */
5369 if (hw->mac.type < e1000_82576)
5370 return;
5371
5372 /* we only need to do this if VMDq is enabled */
5373 if (!adapter->vfs_allocated_count)
5374 return;
5375
5376 for (i = 0; i < hw->mac.uta_reg_count; i++)
5377 array_wr32(E1000_UTA, i, ~0);
5378 }
5379
5380 /**
5381 * igb_intr_msi - Interrupt Handler
5382 * @irq: interrupt number
5383 * @data: pointer to a network interface device structure
5384 **/
5385 static irqreturn_t igb_intr_msi(int irq, void *data)
5386 {
5387 struct igb_adapter *adapter = data;
5388 struct igb_q_vector *q_vector = adapter->q_vector[0];
5389 struct e1000_hw *hw = &adapter->hw;
5390 /* read ICR disables interrupts using IAM */
5391 u32 icr = rd32(E1000_ICR);
5392
5393 igb_write_itr(q_vector);
5394
5395 if (icr & E1000_ICR_DRSTA)
5396 schedule_work(&adapter->reset_task);
5397
5398 if (icr & E1000_ICR_DOUTSYNC) {
5399 /* HW is reporting DMA is out of sync */
5400 adapter->stats.doosync++;
5401 }
5402
5403 if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
5404 hw->mac.get_link_status = 1;
5405 if (!test_bit(__IGB_DOWN, &adapter->state))
5406 mod_timer(&adapter->watchdog_timer, jiffies + 1);
5407 }
5408
5409 napi_schedule(&q_vector->napi);
5410
5411 return IRQ_HANDLED;
5412 }
5413
5414 /**
5415 * igb_intr - Legacy Interrupt Handler
5416 * @irq: interrupt number
5417 * @data: pointer to a network interface device structure
5418 **/
5419 static irqreturn_t igb_intr(int irq, void *data)
5420 {
5421 struct igb_adapter *adapter = data;
5422 struct igb_q_vector *q_vector = adapter->q_vector[0];
5423 struct e1000_hw *hw = &adapter->hw;
5424 /* Interrupt Auto-Mask...upon reading ICR, interrupts are masked. No
5425 * need for the IMC write */
5426 u32 icr = rd32(E1000_ICR);
5427 if (!icr)
5428 return IRQ_NONE; /* Not our interrupt */
5429
5430 igb_write_itr(q_vector);
5431
5432 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
5433 * not set, then the adapter didn't send an interrupt */
5434 if (!(icr & E1000_ICR_INT_ASSERTED))
5435 return IRQ_NONE;
5436
5437 if (icr & E1000_ICR_DRSTA)
5438 schedule_work(&adapter->reset_task);
5439
5440 if (icr & E1000_ICR_DOUTSYNC) {
5441 /* HW is reporting DMA is out of sync */
5442 adapter->stats.doosync++;
5443 }
5444
5445 if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
5446 hw->mac.get_link_status = 1;
5447 /* guard against interrupt when we're going down */
5448 if (!test_bit(__IGB_DOWN, &adapter->state))
5449 mod_timer(&adapter->watchdog_timer, jiffies + 1);
5450 }
5451
5452 napi_schedule(&q_vector->napi);
5453
5454 return IRQ_HANDLED;
5455 }
5456
5457 static inline void igb_ring_irq_enable(struct igb_q_vector *q_vector)
5458 {
5459 struct igb_adapter *adapter = q_vector->adapter;
5460 struct e1000_hw *hw = &adapter->hw;
5461
5462 if ((q_vector->rx_ring && (adapter->rx_itr_setting & 3)) ||
5463 (!q_vector->rx_ring && (adapter->tx_itr_setting & 3))) {
5464 if (!adapter->msix_entries)
5465 igb_set_itr(adapter);
5466 else
5467 igb_update_ring_itr(q_vector);
5468 }
5469
5470 if (!test_bit(__IGB_DOWN, &adapter->state)) {
5471 if (adapter->msix_entries)
5472 wr32(E1000_EIMS, q_vector->eims_value);
5473 else
5474 igb_irq_enable(adapter);
5475 }
5476 }
5477
5478 /**
5479 * igb_poll - NAPI Rx polling callback
5480 * @napi: napi polling structure
5481 * @budget: count of how many packets we should handle
5482 **/
5483 static int igb_poll(struct napi_struct *napi, int budget)
5484 {
5485 struct igb_q_vector *q_vector = container_of(napi,
5486 struct igb_q_vector,
5487 napi);
5488 int tx_clean_complete = 1, work_done = 0;
5489
5490 #ifdef CONFIG_IGB_DCA
5491 if (q_vector->adapter->flags & IGB_FLAG_DCA_ENABLED)
5492 igb_update_dca(q_vector);
5493 #endif
5494 if (q_vector->tx_ring)
5495 tx_clean_complete = igb_clean_tx_irq(q_vector);
5496
5497 if (q_vector->rx_ring)
5498 igb_clean_rx_irq_adv(q_vector, &work_done, budget);
5499
5500 if (!tx_clean_complete)
5501 work_done = budget;
5502
5503 /* If not enough Rx work done, exit the polling mode */
5504 if (work_done < budget) {
5505 napi_complete(napi);
5506 igb_ring_irq_enable(q_vector);
5507 }
5508
5509 return work_done;
5510 }
5511
5512 /**
5513 * igb_systim_to_hwtstamp - convert system time value to hw timestamp
5514 * @adapter: board private structure
5515 * @shhwtstamps: timestamp structure to update
5516 * @regval: unsigned 64bit system time value.
5517 *
5518 * We need to convert the system time value stored in the RX/TXSTMP registers
5519 * into a hwtstamp which can be used by the upper level timestamping functions
5520 */
5521 static void igb_systim_to_hwtstamp(struct igb_adapter *adapter,
5522 struct skb_shared_hwtstamps *shhwtstamps,
5523 u64 regval)
5524 {
5525 u64 ns;
5526
5527 /*
5528 * The 82580 starts with 1ns at bit 0 in RX/TXSTMPL, shift this up to
5529 * 24 to match clock shift we setup earlier.
5530 */
5531 if (adapter->hw.mac.type == e1000_82580)
5532 regval <<= IGB_82580_TSYNC_SHIFT;
5533
5534 ns = timecounter_cyc2time(&adapter->clock, regval);
5535 timecompare_update(&adapter->compare, ns);
5536 memset(shhwtstamps, 0, sizeof(struct skb_shared_hwtstamps));
5537 shhwtstamps->hwtstamp = ns_to_ktime(ns);
5538 shhwtstamps->syststamp = timecompare_transform(&adapter->compare, ns);
5539 }
5540
5541 /**
5542 * igb_tx_hwtstamp - utility function which checks for TX time stamp
5543 * @q_vector: pointer to q_vector containing needed info
5544 * @buffer: pointer to igb_buffer structure
5545 *
5546 * If we were asked to do hardware stamping and such a time stamp is
5547 * available, then it must have been for this skb here because we only
5548 * allow only one such packet into the queue.
5549 */
5550 static void igb_tx_hwtstamp(struct igb_q_vector *q_vector, struct igb_buffer *buffer_info)
5551 {
5552 struct igb_adapter *adapter = q_vector->adapter;
5553 struct e1000_hw *hw = &adapter->hw;
5554 struct skb_shared_hwtstamps shhwtstamps;
5555 u64 regval;
5556
5557 /* if skb does not support hw timestamp or TX stamp not valid exit */
5558 if (likely(!(buffer_info->tx_flags & SKBTX_HW_TSTAMP)) ||
5559 !(rd32(E1000_TSYNCTXCTL) & E1000_TSYNCTXCTL_VALID))
5560 return;
5561
5562 regval = rd32(E1000_TXSTMPL);
5563 regval |= (u64)rd32(E1000_TXSTMPH) << 32;
5564
5565 igb_systim_to_hwtstamp(adapter, &shhwtstamps, regval);
5566 skb_tstamp_tx(buffer_info->skb, &shhwtstamps);
5567 }
5568
5569 /**
5570 * igb_clean_tx_irq - Reclaim resources after transmit completes
5571 * @q_vector: pointer to q_vector containing needed info
5572 * returns true if ring is completely cleaned
5573 **/
5574 static bool igb_clean_tx_irq(struct igb_q_vector *q_vector)
5575 {
5576 struct igb_adapter *adapter = q_vector->adapter;
5577 struct igb_ring *tx_ring = q_vector->tx_ring;
5578 struct net_device *netdev = tx_ring->netdev;
5579 struct e1000_hw *hw = &adapter->hw;
5580 struct igb_buffer *buffer_info;
5581 union e1000_adv_tx_desc *tx_desc, *eop_desc;
5582 unsigned int total_bytes = 0, total_packets = 0;
5583 unsigned int i, eop, count = 0;
5584 bool cleaned = false;
5585
5586 i = tx_ring->next_to_clean;
5587 eop = tx_ring->buffer_info[i].next_to_watch;
5588 eop_desc = E1000_TX_DESC_ADV(*tx_ring, eop);
5589
5590 while ((eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)) &&
5591 (count < tx_ring->count)) {
5592 rmb(); /* read buffer_info after eop_desc status */
5593 for (cleaned = false; !cleaned; count++) {
5594 tx_desc = E1000_TX_DESC_ADV(*tx_ring, i);
5595 buffer_info = &tx_ring->buffer_info[i];
5596 cleaned = (i == eop);
5597
5598 if (buffer_info->skb) {
5599 total_bytes += buffer_info->bytecount;
5600 /* gso_segs is currently only valid for tcp */
5601 total_packets += buffer_info->gso_segs;
5602 igb_tx_hwtstamp(q_vector, buffer_info);
5603 }
5604
5605 igb_unmap_and_free_tx_resource(tx_ring, buffer_info);
5606 tx_desc->wb.status = 0;
5607
5608 i++;
5609 if (i == tx_ring->count)
5610 i = 0;
5611 }
5612 eop = tx_ring->buffer_info[i].next_to_watch;
5613 eop_desc = E1000_TX_DESC_ADV(*tx_ring, eop);
5614 }
5615
5616 tx_ring->next_to_clean = i;
5617
5618 if (unlikely(count &&
5619 netif_carrier_ok(netdev) &&
5620 igb_desc_unused(tx_ring) >= IGB_TX_QUEUE_WAKE)) {
5621 /* Make sure that anybody stopping the queue after this
5622 * sees the new next_to_clean.
5623 */
5624 smp_mb();
5625 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
5626 !(test_bit(__IGB_DOWN, &adapter->state))) {
5627 netif_wake_subqueue(netdev, tx_ring->queue_index);
5628
5629 u64_stats_update_begin(&tx_ring->tx_syncp);
5630 tx_ring->tx_stats.restart_queue++;
5631 u64_stats_update_end(&tx_ring->tx_syncp);
5632 }
5633 }
5634
5635 if (tx_ring->detect_tx_hung) {
5636 /* Detect a transmit hang in hardware, this serializes the
5637 * check with the clearing of time_stamp and movement of i */
5638 tx_ring->detect_tx_hung = false;
5639 if (tx_ring->buffer_info[i].time_stamp &&
5640 time_after(jiffies, tx_ring->buffer_info[i].time_stamp +
5641 (adapter->tx_timeout_factor * HZ)) &&
5642 !(rd32(E1000_STATUS) & E1000_STATUS_TXOFF)) {
5643
5644 /* detected Tx unit hang */
5645 dev_err(tx_ring->dev,
5646 "Detected Tx Unit Hang\n"
5647 " Tx Queue <%d>\n"
5648 " TDH <%x>\n"
5649 " TDT <%x>\n"
5650 " next_to_use <%x>\n"
5651 " next_to_clean <%x>\n"
5652 "buffer_info[next_to_clean]\n"
5653 " time_stamp <%lx>\n"
5654 " next_to_watch <%x>\n"
5655 " jiffies <%lx>\n"
5656 " desc.status <%x>\n",
5657 tx_ring->queue_index,
5658 readl(tx_ring->head),
5659 readl(tx_ring->tail),
5660 tx_ring->next_to_use,
5661 tx_ring->next_to_clean,
5662 tx_ring->buffer_info[eop].time_stamp,
5663 eop,
5664 jiffies,
5665 eop_desc->wb.status);
5666 netif_stop_subqueue(netdev, tx_ring->queue_index);
5667 }
5668 }
5669 tx_ring->total_bytes += total_bytes;
5670 tx_ring->total_packets += total_packets;
5671 u64_stats_update_begin(&tx_ring->tx_syncp);
5672 tx_ring->tx_stats.bytes += total_bytes;
5673 tx_ring->tx_stats.packets += total_packets;
5674 u64_stats_update_end(&tx_ring->tx_syncp);
5675 return count < tx_ring->count;
5676 }
5677
5678 /**
5679 * igb_receive_skb - helper function to handle rx indications
5680 * @q_vector: structure containing interrupt and ring information
5681 * @skb: packet to send up
5682 * @vlan_tag: vlan tag for packet
5683 **/
5684 static void igb_receive_skb(struct igb_q_vector *q_vector,
5685 struct sk_buff *skb,
5686 u16 vlan_tag)
5687 {
5688 struct igb_adapter *adapter = q_vector->adapter;
5689
5690 if (vlan_tag && adapter->vlgrp)
5691 vlan_gro_receive(&q_vector->napi, adapter->vlgrp,
5692 vlan_tag, skb);
5693 else
5694 napi_gro_receive(&q_vector->napi, skb);
5695 }
5696
5697 static inline void igb_rx_checksum_adv(struct igb_ring *ring,
5698 u32 status_err, struct sk_buff *skb)
5699 {
5700 skb_checksum_none_assert(skb);
5701
5702 /* Ignore Checksum bit is set or checksum is disabled through ethtool */
5703 if (!(ring->flags & IGB_RING_FLAG_RX_CSUM) ||
5704 (status_err & E1000_RXD_STAT_IXSM))
5705 return;
5706
5707 /* TCP/UDP checksum error bit is set */
5708 if (status_err &
5709 (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) {
5710 /*
5711 * work around errata with sctp packets where the TCPE aka
5712 * L4E bit is set incorrectly on 64 byte (60 byte w/o crc)
5713 * packets, (aka let the stack check the crc32c)
5714 */
5715 if ((skb->len == 60) &&
5716 (ring->flags & IGB_RING_FLAG_RX_SCTP_CSUM)) {
5717 u64_stats_update_begin(&ring->rx_syncp);
5718 ring->rx_stats.csum_err++;
5719 u64_stats_update_end(&ring->rx_syncp);
5720 }
5721 /* let the stack verify checksum errors */
5722 return;
5723 }
5724 /* It must be a TCP or UDP packet with a valid checksum */
5725 if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))
5726 skb->ip_summed = CHECKSUM_UNNECESSARY;
5727
5728 dev_dbg(ring->dev, "cksum success: bits %08X\n", status_err);
5729 }
5730
5731 static void igb_rx_hwtstamp(struct igb_q_vector *q_vector, u32 staterr,
5732 struct sk_buff *skb)
5733 {
5734 struct igb_adapter *adapter = q_vector->adapter;
5735 struct e1000_hw *hw = &adapter->hw;
5736 u64 regval;
5737
5738 /*
5739 * If this bit is set, then the RX registers contain the time stamp. No
5740 * other packet will be time stamped until we read these registers, so
5741 * read the registers to make them available again. Because only one
5742 * packet can be time stamped at a time, we know that the register
5743 * values must belong to this one here and therefore we don't need to
5744 * compare any of the additional attributes stored for it.
5745 *
5746 * If nothing went wrong, then it should have a shared tx_flags that we
5747 * can turn into a skb_shared_hwtstamps.
5748 */
5749 if (staterr & E1000_RXDADV_STAT_TSIP) {
5750 u32 *stamp = (u32 *)skb->data;
5751 regval = le32_to_cpu(*(stamp + 2));
5752 regval |= (u64)le32_to_cpu(*(stamp + 3)) << 32;
5753 skb_pull(skb, IGB_TS_HDR_LEN);
5754 } else {
5755 if(!(rd32(E1000_TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID))
5756 return;
5757
5758 regval = rd32(E1000_RXSTMPL);
5759 regval |= (u64)rd32(E1000_RXSTMPH) << 32;
5760 }
5761
5762 igb_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), regval);
5763 }
5764 static inline u16 igb_get_hlen(struct igb_ring *rx_ring,
5765 union e1000_adv_rx_desc *rx_desc)
5766 {
5767 /* HW will not DMA in data larger than the given buffer, even if it
5768 * parses the (NFS, of course) header to be larger. In that case, it
5769 * fills the header buffer and spills the rest into the page.
5770 */
5771 u16 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hdr_info) &
5772 E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT;
5773 if (hlen > rx_ring->rx_buffer_len)
5774 hlen = rx_ring->rx_buffer_len;
5775 return hlen;
5776 }
5777
5778 static bool igb_clean_rx_irq_adv(struct igb_q_vector *q_vector,
5779 int *work_done, int budget)
5780 {
5781 struct igb_ring *rx_ring = q_vector->rx_ring;
5782 struct net_device *netdev = rx_ring->netdev;
5783 struct device *dev = rx_ring->dev;
5784 union e1000_adv_rx_desc *rx_desc , *next_rxd;
5785 struct igb_buffer *buffer_info , *next_buffer;
5786 struct sk_buff *skb;
5787 bool cleaned = false;
5788 int cleaned_count = 0;
5789 int current_node = numa_node_id();
5790 unsigned int total_bytes = 0, total_packets = 0;
5791 unsigned int i;
5792 u32 staterr;
5793 u16 length;
5794 u16 vlan_tag;
5795
5796 i = rx_ring->next_to_clean;
5797 buffer_info = &rx_ring->buffer_info[i];
5798 rx_desc = E1000_RX_DESC_ADV(*rx_ring, i);
5799 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
5800
5801 while (staterr & E1000_RXD_STAT_DD) {
5802 if (*work_done >= budget)
5803 break;
5804 (*work_done)++;
5805 rmb(); /* read descriptor and rx_buffer_info after status DD */
5806
5807 skb = buffer_info->skb;
5808 prefetch(skb->data - NET_IP_ALIGN);
5809 buffer_info->skb = NULL;
5810
5811 i++;
5812 if (i == rx_ring->count)
5813 i = 0;
5814
5815 next_rxd = E1000_RX_DESC_ADV(*rx_ring, i);
5816 prefetch(next_rxd);
5817 next_buffer = &rx_ring->buffer_info[i];
5818
5819 length = le16_to_cpu(rx_desc->wb.upper.length);
5820 cleaned = true;
5821 cleaned_count++;
5822
5823 if (buffer_info->dma) {
5824 dma_unmap_single(dev, buffer_info->dma,
5825 rx_ring->rx_buffer_len,
5826 DMA_FROM_DEVICE);
5827 buffer_info->dma = 0;
5828 if (rx_ring->rx_buffer_len >= IGB_RXBUFFER_1024) {
5829 skb_put(skb, length);
5830 goto send_up;
5831 }
5832 skb_put(skb, igb_get_hlen(rx_ring, rx_desc));
5833 }
5834
5835 if (length) {
5836 dma_unmap_page(dev, buffer_info->page_dma,
5837 PAGE_SIZE / 2, DMA_FROM_DEVICE);
5838 buffer_info->page_dma = 0;
5839
5840 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
5841 buffer_info->page,
5842 buffer_info->page_offset,
5843 length);
5844
5845 if ((page_count(buffer_info->page) != 1) ||
5846 (page_to_nid(buffer_info->page) != current_node))
5847 buffer_info->page = NULL;
5848 else
5849 get_page(buffer_info->page);
5850
5851 skb->len += length;
5852 skb->data_len += length;
5853 skb->truesize += length;
5854 }
5855
5856 if (!(staterr & E1000_RXD_STAT_EOP)) {
5857 buffer_info->skb = next_buffer->skb;
5858 buffer_info->dma = next_buffer->dma;
5859 next_buffer->skb = skb;
5860 next_buffer->dma = 0;
5861 goto next_desc;
5862 }
5863 send_up:
5864 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
5865 dev_kfree_skb_irq(skb);
5866 goto next_desc;
5867 }
5868
5869 if (staterr & (E1000_RXDADV_STAT_TSIP | E1000_RXDADV_STAT_TS))
5870 igb_rx_hwtstamp(q_vector, staterr, skb);
5871 total_bytes += skb->len;
5872 total_packets++;
5873
5874 igb_rx_checksum_adv(rx_ring, staterr, skb);
5875
5876 skb->protocol = eth_type_trans(skb, netdev);
5877 skb_record_rx_queue(skb, rx_ring->queue_index);
5878
5879 vlan_tag = ((staterr & E1000_RXD_STAT_VP) ?
5880 le16_to_cpu(rx_desc->wb.upper.vlan) : 0);
5881
5882 igb_receive_skb(q_vector, skb, vlan_tag);
5883
5884 next_desc:
5885 rx_desc->wb.upper.status_error = 0;
5886
5887 /* return some buffers to hardware, one at a time is too slow */
5888 if (cleaned_count >= IGB_RX_BUFFER_WRITE) {
5889 igb_alloc_rx_buffers_adv(rx_ring, cleaned_count);
5890 cleaned_count = 0;
5891 }
5892
5893 /* use prefetched values */
5894 rx_desc = next_rxd;
5895 buffer_info = next_buffer;
5896 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
5897 }
5898
5899 rx_ring->next_to_clean = i;
5900 cleaned_count = igb_desc_unused(rx_ring);
5901
5902 if (cleaned_count)
5903 igb_alloc_rx_buffers_adv(rx_ring, cleaned_count);
5904
5905 rx_ring->total_packets += total_packets;
5906 rx_ring->total_bytes += total_bytes;
5907 u64_stats_update_begin(&rx_ring->rx_syncp);
5908 rx_ring->rx_stats.packets += total_packets;
5909 rx_ring->rx_stats.bytes += total_bytes;
5910 u64_stats_update_end(&rx_ring->rx_syncp);
5911 return cleaned;
5912 }
5913
5914 /**
5915 * igb_alloc_rx_buffers_adv - Replace used receive buffers; packet split
5916 * @adapter: address of board private structure
5917 **/
5918 void igb_alloc_rx_buffers_adv(struct igb_ring *rx_ring, int cleaned_count)
5919 {
5920 struct net_device *netdev = rx_ring->netdev;
5921 union e1000_adv_rx_desc *rx_desc;
5922 struct igb_buffer *buffer_info;
5923 struct sk_buff *skb;
5924 unsigned int i;
5925 int bufsz;
5926
5927 i = rx_ring->next_to_use;
5928 buffer_info = &rx_ring->buffer_info[i];
5929
5930 bufsz = rx_ring->rx_buffer_len;
5931
5932 while (cleaned_count--) {
5933 rx_desc = E1000_RX_DESC_ADV(*rx_ring, i);
5934
5935 if ((bufsz < IGB_RXBUFFER_1024) && !buffer_info->page_dma) {
5936 if (!buffer_info->page) {
5937 buffer_info->page = netdev_alloc_page(netdev);
5938 if (unlikely(!buffer_info->page)) {
5939 u64_stats_update_begin(&rx_ring->rx_syncp);
5940 rx_ring->rx_stats.alloc_failed++;
5941 u64_stats_update_end(&rx_ring->rx_syncp);
5942 goto no_buffers;
5943 }
5944 buffer_info->page_offset = 0;
5945 } else {
5946 buffer_info->page_offset ^= PAGE_SIZE / 2;
5947 }
5948 buffer_info->page_dma =
5949 dma_map_page(rx_ring->dev, buffer_info->page,
5950 buffer_info->page_offset,
5951 PAGE_SIZE / 2,
5952 DMA_FROM_DEVICE);
5953 if (dma_mapping_error(rx_ring->dev,
5954 buffer_info->page_dma)) {
5955 buffer_info->page_dma = 0;
5956 u64_stats_update_begin(&rx_ring->rx_syncp);
5957 rx_ring->rx_stats.alloc_failed++;
5958 u64_stats_update_end(&rx_ring->rx_syncp);
5959 goto no_buffers;
5960 }
5961 }
5962
5963 skb = buffer_info->skb;
5964 if (!skb) {
5965 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
5966 if (unlikely(!skb)) {
5967 u64_stats_update_begin(&rx_ring->rx_syncp);
5968 rx_ring->rx_stats.alloc_failed++;
5969 u64_stats_update_end(&rx_ring->rx_syncp);
5970 goto no_buffers;
5971 }
5972
5973 buffer_info->skb = skb;
5974 }
5975 if (!buffer_info->dma) {
5976 buffer_info->dma = dma_map_single(rx_ring->dev,
5977 skb->data,
5978 bufsz,
5979 DMA_FROM_DEVICE);
5980 if (dma_mapping_error(rx_ring->dev,
5981 buffer_info->dma)) {
5982 buffer_info->dma = 0;
5983 u64_stats_update_begin(&rx_ring->rx_syncp);
5984 rx_ring->rx_stats.alloc_failed++;
5985 u64_stats_update_end(&rx_ring->rx_syncp);
5986 goto no_buffers;
5987 }
5988 }
5989 /* Refresh the desc even if buffer_addrs didn't change because
5990 * each write-back erases this info. */
5991 if (bufsz < IGB_RXBUFFER_1024) {
5992 rx_desc->read.pkt_addr =
5993 cpu_to_le64(buffer_info->page_dma);
5994 rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma);
5995 } else {
5996 rx_desc->read.pkt_addr = cpu_to_le64(buffer_info->dma);
5997 rx_desc->read.hdr_addr = 0;
5998 }
5999
6000 i++;
6001 if (i == rx_ring->count)
6002 i = 0;
6003 buffer_info = &rx_ring->buffer_info[i];
6004 }
6005
6006 no_buffers:
6007 if (rx_ring->next_to_use != i) {
6008 rx_ring->next_to_use = i;
6009 if (i == 0)
6010 i = (rx_ring->count - 1);
6011 else
6012 i--;
6013
6014 /* Force memory writes to complete before letting h/w
6015 * know there are new descriptors to fetch. (Only
6016 * applicable for weak-ordered memory model archs,
6017 * such as IA-64). */
6018 wmb();
6019 writel(i, rx_ring->tail);
6020 }
6021 }
6022
6023 /**
6024 * igb_mii_ioctl -
6025 * @netdev:
6026 * @ifreq:
6027 * @cmd:
6028 **/
6029 static int igb_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
6030 {
6031 struct igb_adapter *adapter = netdev_priv(netdev);
6032 struct mii_ioctl_data *data = if_mii(ifr);
6033
6034 if (adapter->hw.phy.media_type != e1000_media_type_copper)
6035 return -EOPNOTSUPP;
6036
6037 switch (cmd) {
6038 case SIOCGMIIPHY:
6039 data->phy_id = adapter->hw.phy.addr;
6040 break;
6041 case SIOCGMIIREG:
6042 if (igb_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
6043 &data->val_out))
6044 return -EIO;
6045 break;
6046 case SIOCSMIIREG:
6047 default:
6048 return -EOPNOTSUPP;
6049 }
6050 return 0;
6051 }
6052
6053 /**
6054 * igb_hwtstamp_ioctl - control hardware time stamping
6055 * @netdev:
6056 * @ifreq:
6057 * @cmd:
6058 *
6059 * Outgoing time stamping can be enabled and disabled. Play nice and
6060 * disable it when requested, although it shouldn't case any overhead
6061 * when no packet needs it. At most one packet in the queue may be
6062 * marked for time stamping, otherwise it would be impossible to tell
6063 * for sure to which packet the hardware time stamp belongs.
6064 *
6065 * Incoming time stamping has to be configured via the hardware
6066 * filters. Not all combinations are supported, in particular event
6067 * type has to be specified. Matching the kind of event packet is
6068 * not supported, with the exception of "all V2 events regardless of
6069 * level 2 or 4".
6070 *
6071 **/
6072 static int igb_hwtstamp_ioctl(struct net_device *netdev,
6073 struct ifreq *ifr, int cmd)
6074 {
6075 struct igb_adapter *adapter = netdev_priv(netdev);
6076 struct e1000_hw *hw = &adapter->hw;
6077 struct hwtstamp_config config;
6078 u32 tsync_tx_ctl = E1000_TSYNCTXCTL_ENABLED;
6079 u32 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED;
6080 u32 tsync_rx_cfg = 0;
6081 bool is_l4 = false;
6082 bool is_l2 = false;
6083 u32 regval;
6084
6085 if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
6086 return -EFAULT;
6087
6088 /* reserved for future extensions */
6089 if (config.flags)
6090 return -EINVAL;
6091
6092 switch (config.tx_type) {
6093 case HWTSTAMP_TX_OFF:
6094 tsync_tx_ctl = 0;
6095 case HWTSTAMP_TX_ON:
6096 break;
6097 default:
6098 return -ERANGE;
6099 }
6100
6101 switch (config.rx_filter) {
6102 case HWTSTAMP_FILTER_NONE:
6103 tsync_rx_ctl = 0;
6104 break;
6105 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
6106 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
6107 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
6108 case HWTSTAMP_FILTER_ALL:
6109 /*
6110 * register TSYNCRXCFG must be set, therefore it is not
6111 * possible to time stamp both Sync and Delay_Req messages
6112 * => fall back to time stamping all packets
6113 */
6114 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL;
6115 config.rx_filter = HWTSTAMP_FILTER_ALL;
6116 break;
6117 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
6118 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
6119 tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V1_SYNC_MESSAGE;
6120 is_l4 = true;
6121 break;
6122 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
6123 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
6124 tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V1_DELAY_REQ_MESSAGE;
6125 is_l4 = true;
6126 break;
6127 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
6128 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
6129 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
6130 tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V2_SYNC_MESSAGE;
6131 is_l2 = true;
6132 is_l4 = true;
6133 config.rx_filter = HWTSTAMP_FILTER_SOME;
6134 break;
6135 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
6136 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
6137 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
6138 tsync_rx_cfg = E1000_TSYNCRXCFG_PTP_V2_DELAY_REQ_MESSAGE;
6139 is_l2 = true;
6140 is_l4 = true;
6141 config.rx_filter = HWTSTAMP_FILTER_SOME;
6142 break;
6143 case HWTSTAMP_FILTER_PTP_V2_EVENT:
6144 case HWTSTAMP_FILTER_PTP_V2_SYNC:
6145 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
6146 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_EVENT_V2;
6147 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
6148 is_l2 = true;
6149 break;
6150 default:
6151 return -ERANGE;
6152 }
6153
6154 if (hw->mac.type == e1000_82575) {
6155 if (tsync_rx_ctl | tsync_tx_ctl)
6156 return -EINVAL;
6157 return 0;
6158 }
6159
6160 /*
6161 * Per-packet timestamping only works if all packets are
6162 * timestamped, so enable timestamping in all packets as
6163 * long as one rx filter was configured.
6164 */
6165 if ((hw->mac.type == e1000_82580) && tsync_rx_ctl) {
6166 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED;
6167 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL;
6168 }
6169
6170 /* enable/disable TX */
6171 regval = rd32(E1000_TSYNCTXCTL);
6172 regval &= ~E1000_TSYNCTXCTL_ENABLED;
6173 regval |= tsync_tx_ctl;
6174 wr32(E1000_TSYNCTXCTL, regval);
6175
6176 /* enable/disable RX */
6177 regval = rd32(E1000_TSYNCRXCTL);
6178 regval &= ~(E1000_TSYNCRXCTL_ENABLED | E1000_TSYNCRXCTL_TYPE_MASK);
6179 regval |= tsync_rx_ctl;
6180 wr32(E1000_TSYNCRXCTL, regval);
6181
6182 /* define which PTP packets are time stamped */
6183 wr32(E1000_TSYNCRXCFG, tsync_rx_cfg);
6184
6185 /* define ethertype filter for timestamped packets */
6186 if (is_l2)
6187 wr32(E1000_ETQF(3),
6188 (E1000_ETQF_FILTER_ENABLE | /* enable filter */
6189 E1000_ETQF_1588 | /* enable timestamping */
6190 ETH_P_1588)); /* 1588 eth protocol type */
6191 else
6192 wr32(E1000_ETQF(3), 0);
6193
6194 #define PTP_PORT 319
6195 /* L4 Queue Filter[3]: filter by destination port and protocol */
6196 if (is_l4) {
6197 u32 ftqf = (IPPROTO_UDP /* UDP */
6198 | E1000_FTQF_VF_BP /* VF not compared */
6199 | E1000_FTQF_1588_TIME_STAMP /* Enable Timestamping */
6200 | E1000_FTQF_MASK); /* mask all inputs */
6201 ftqf &= ~E1000_FTQF_MASK_PROTO_BP; /* enable protocol check */
6202
6203 wr32(E1000_IMIR(3), htons(PTP_PORT));
6204 wr32(E1000_IMIREXT(3),
6205 (E1000_IMIREXT_SIZE_BP | E1000_IMIREXT_CTRL_BP));
6206 if (hw->mac.type == e1000_82576) {
6207 /* enable source port check */
6208 wr32(E1000_SPQF(3), htons(PTP_PORT));
6209 ftqf &= ~E1000_FTQF_MASK_SOURCE_PORT_BP;
6210 }
6211 wr32(E1000_FTQF(3), ftqf);
6212 } else {
6213 wr32(E1000_FTQF(3), E1000_FTQF_MASK);
6214 }
6215 wrfl();
6216
6217 adapter->hwtstamp_config = config;
6218
6219 /* clear TX/RX time stamp registers, just to be sure */
6220 regval = rd32(E1000_TXSTMPH);
6221 regval = rd32(E1000_RXSTMPH);
6222
6223 return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
6224 -EFAULT : 0;
6225 }
6226
6227 /**
6228 * igb_ioctl -
6229 * @netdev:
6230 * @ifreq:
6231 * @cmd:
6232 **/
6233 static int igb_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
6234 {
6235 switch (cmd) {
6236 case SIOCGMIIPHY:
6237 case SIOCGMIIREG:
6238 case SIOCSMIIREG:
6239 return igb_mii_ioctl(netdev, ifr, cmd);
6240 case SIOCSHWTSTAMP:
6241 return igb_hwtstamp_ioctl(netdev, ifr, cmd);
6242 default:
6243 return -EOPNOTSUPP;
6244 }
6245 }
6246
6247 s32 igb_read_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value)
6248 {
6249 struct igb_adapter *adapter = hw->back;
6250 u16 cap_offset;
6251
6252 cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
6253 if (!cap_offset)
6254 return -E1000_ERR_CONFIG;
6255
6256 pci_read_config_word(adapter->pdev, cap_offset + reg, value);
6257
6258 return 0;
6259 }
6260
6261 s32 igb_write_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value)
6262 {
6263 struct igb_adapter *adapter = hw->back;
6264 u16 cap_offset;
6265
6266 cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
6267 if (!cap_offset)
6268 return -E1000_ERR_CONFIG;
6269
6270 pci_write_config_word(adapter->pdev, cap_offset + reg, *value);
6271
6272 return 0;
6273 }
6274
6275 static void igb_vlan_rx_register(struct net_device *netdev,
6276 struct vlan_group *grp)
6277 {
6278 struct igb_adapter *adapter = netdev_priv(netdev);
6279 struct e1000_hw *hw = &adapter->hw;
6280 u32 ctrl, rctl;
6281
6282 igb_irq_disable(adapter);
6283 adapter->vlgrp = grp;
6284
6285 if (grp) {
6286 /* enable VLAN tag insert/strip */
6287 ctrl = rd32(E1000_CTRL);
6288 ctrl |= E1000_CTRL_VME;
6289 wr32(E1000_CTRL, ctrl);
6290
6291 /* Disable CFI check */
6292 rctl = rd32(E1000_RCTL);
6293 rctl &= ~E1000_RCTL_CFIEN;
6294 wr32(E1000_RCTL, rctl);
6295 } else {
6296 /* disable VLAN tag insert/strip */
6297 ctrl = rd32(E1000_CTRL);
6298 ctrl &= ~E1000_CTRL_VME;
6299 wr32(E1000_CTRL, ctrl);
6300 }
6301
6302 igb_rlpml_set(adapter);
6303
6304 if (!test_bit(__IGB_DOWN, &adapter->state))
6305 igb_irq_enable(adapter);
6306 }
6307
6308 static void igb_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
6309 {
6310 struct igb_adapter *adapter = netdev_priv(netdev);
6311 struct e1000_hw *hw = &adapter->hw;
6312 int pf_id = adapter->vfs_allocated_count;
6313
6314 /* attempt to add filter to vlvf array */
6315 igb_vlvf_set(adapter, vid, true, pf_id);
6316
6317 /* add the filter since PF can receive vlans w/o entry in vlvf */
6318 igb_vfta_set(hw, vid, true);
6319 }
6320
6321 static void igb_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
6322 {
6323 struct igb_adapter *adapter = netdev_priv(netdev);
6324 struct e1000_hw *hw = &adapter->hw;
6325 int pf_id = adapter->vfs_allocated_count;
6326 s32 err;
6327
6328 igb_irq_disable(adapter);
6329 vlan_group_set_device(adapter->vlgrp, vid, NULL);
6330
6331 if (!test_bit(__IGB_DOWN, &adapter->state))
6332 igb_irq_enable(adapter);
6333
6334 /* remove vlan from VLVF table array */
6335 err = igb_vlvf_set(adapter, vid, false, pf_id);
6336
6337 /* if vid was not present in VLVF just remove it from table */
6338 if (err)
6339 igb_vfta_set(hw, vid, false);
6340 }
6341
6342 static void igb_restore_vlan(struct igb_adapter *adapter)
6343 {
6344 igb_vlan_rx_register(adapter->netdev, adapter->vlgrp);
6345
6346 if (adapter->vlgrp) {
6347 u16 vid;
6348 for (vid = 0; vid < VLAN_N_VID; vid++) {
6349 if (!vlan_group_get_device(adapter->vlgrp, vid))
6350 continue;
6351 igb_vlan_rx_add_vid(adapter->netdev, vid);
6352 }
6353 }
6354 }
6355
6356 int igb_set_spd_dplx(struct igb_adapter *adapter, u32 spd, u8 dplx)
6357 {
6358 struct pci_dev *pdev = adapter->pdev;
6359 struct e1000_mac_info *mac = &adapter->hw.mac;
6360
6361 mac->autoneg = 0;
6362
6363 /* Make sure dplx is at most 1 bit and lsb of speed is not set
6364 * for the switch() below to work */
6365 if ((spd & 1) || (dplx & ~1))
6366 goto err_inval;
6367
6368 /* Fiber NIC's only allow 1000 Gbps Full duplex */
6369 if ((adapter->hw.phy.media_type == e1000_media_type_internal_serdes) &&
6370 spd != SPEED_1000 &&
6371 dplx != DUPLEX_FULL)
6372 goto err_inval;
6373
6374 switch (spd + dplx) {
6375 case SPEED_10 + DUPLEX_HALF:
6376 mac->forced_speed_duplex = ADVERTISE_10_HALF;
6377 break;
6378 case SPEED_10 + DUPLEX_FULL:
6379 mac->forced_speed_duplex = ADVERTISE_10_FULL;
6380 break;
6381 case SPEED_100 + DUPLEX_HALF:
6382 mac->forced_speed_duplex = ADVERTISE_100_HALF;
6383 break;
6384 case SPEED_100 + DUPLEX_FULL:
6385 mac->forced_speed_duplex = ADVERTISE_100_FULL;
6386 break;
6387 case SPEED_1000 + DUPLEX_FULL:
6388 mac->autoneg = 1;
6389 adapter->hw.phy.autoneg_advertised = ADVERTISE_1000_FULL;
6390 break;
6391 case SPEED_1000 + DUPLEX_HALF: /* not supported */
6392 default:
6393 goto err_inval;
6394 }
6395 return 0;
6396
6397 err_inval:
6398 dev_err(&pdev->dev, "Unsupported Speed/Duplex configuration\n");
6399 return -EINVAL;
6400 }
6401
6402 static int __igb_shutdown(struct pci_dev *pdev, bool *enable_wake)
6403 {
6404 struct net_device *netdev = pci_get_drvdata(pdev);
6405 struct igb_adapter *adapter = netdev_priv(netdev);
6406 struct e1000_hw *hw = &adapter->hw;
6407 u32 ctrl, rctl, status;
6408 u32 wufc = adapter->wol;
6409 #ifdef CONFIG_PM
6410 int retval = 0;
6411 #endif
6412
6413 netif_device_detach(netdev);
6414
6415 if (netif_running(netdev))
6416 igb_close(netdev);
6417
6418 igb_clear_interrupt_scheme(adapter);
6419
6420 #ifdef CONFIG_PM
6421 retval = pci_save_state(pdev);
6422 if (retval)
6423 return retval;
6424 #endif
6425
6426 status = rd32(E1000_STATUS);
6427 if (status & E1000_STATUS_LU)
6428 wufc &= ~E1000_WUFC_LNKC;
6429
6430 if (wufc) {
6431 igb_setup_rctl(adapter);
6432 igb_set_rx_mode(netdev);
6433
6434 /* turn on all-multi mode if wake on multicast is enabled */
6435 if (wufc & E1000_WUFC_MC) {
6436 rctl = rd32(E1000_RCTL);
6437 rctl |= E1000_RCTL_MPE;
6438 wr32(E1000_RCTL, rctl);
6439 }
6440
6441 ctrl = rd32(E1000_CTRL);
6442 /* advertise wake from D3Cold */
6443 #define E1000_CTRL_ADVD3WUC 0x00100000
6444 /* phy power management enable */
6445 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
6446 ctrl |= E1000_CTRL_ADVD3WUC;
6447 wr32(E1000_CTRL, ctrl);
6448
6449 /* Allow time for pending master requests to run */
6450 igb_disable_pcie_master(hw);
6451
6452 wr32(E1000_WUC, E1000_WUC_PME_EN);
6453 wr32(E1000_WUFC, wufc);
6454 } else {
6455 wr32(E1000_WUC, 0);
6456 wr32(E1000_WUFC, 0);
6457 }
6458
6459 *enable_wake = wufc || adapter->en_mng_pt;
6460 if (!*enable_wake)
6461 igb_power_down_link(adapter);
6462 else
6463 igb_power_up_link(adapter);
6464
6465 /* Release control of h/w to f/w. If f/w is AMT enabled, this
6466 * would have already happened in close and is redundant. */
6467 igb_release_hw_control(adapter);
6468
6469 pci_disable_device(pdev);
6470
6471 return 0;
6472 }
6473
6474 #ifdef CONFIG_PM
6475 static int igb_suspend(struct pci_dev *pdev, pm_message_t state)
6476 {
6477 int retval;
6478 bool wake;
6479
6480 retval = __igb_shutdown(pdev, &wake);
6481 if (retval)
6482 return retval;
6483
6484 if (wake) {
6485 pci_prepare_to_sleep(pdev);
6486 } else {
6487 pci_wake_from_d3(pdev, false);
6488 pci_set_power_state(pdev, PCI_D3hot);
6489 }
6490
6491 return 0;
6492 }
6493
6494 static int igb_resume(struct pci_dev *pdev)
6495 {
6496 struct net_device *netdev = pci_get_drvdata(pdev);
6497 struct igb_adapter *adapter = netdev_priv(netdev);
6498 struct e1000_hw *hw = &adapter->hw;
6499 u32 err;
6500
6501 pci_set_power_state(pdev, PCI_D0);
6502 pci_restore_state(pdev);
6503 pci_save_state(pdev);
6504
6505 err = pci_enable_device_mem(pdev);
6506 if (err) {
6507 dev_err(&pdev->dev,
6508 "igb: Cannot enable PCI device from suspend\n");
6509 return err;
6510 }
6511 pci_set_master(pdev);
6512
6513 pci_enable_wake(pdev, PCI_D3hot, 0);
6514 pci_enable_wake(pdev, PCI_D3cold, 0);
6515
6516 if (igb_init_interrupt_scheme(adapter)) {
6517 dev_err(&pdev->dev, "Unable to allocate memory for queues\n");
6518 return -ENOMEM;
6519 }
6520
6521 igb_reset(adapter);
6522
6523 /* let the f/w know that the h/w is now under the control of the
6524 * driver. */
6525 igb_get_hw_control(adapter);
6526
6527 wr32(E1000_WUS, ~0);
6528
6529 if (netif_running(netdev)) {
6530 err = igb_open(netdev);
6531 if (err)
6532 return err;
6533 }
6534
6535 netif_device_attach(netdev);
6536
6537 return 0;
6538 }
6539 #endif
6540
6541 static void igb_shutdown(struct pci_dev *pdev)
6542 {
6543 bool wake;
6544
6545 __igb_shutdown(pdev, &wake);
6546
6547 if (system_state == SYSTEM_POWER_OFF) {
6548 pci_wake_from_d3(pdev, wake);
6549 pci_set_power_state(pdev, PCI_D3hot);
6550 }
6551 }
6552
6553 #ifdef CONFIG_NET_POLL_CONTROLLER
6554 /*
6555 * Polling 'interrupt' - used by things like netconsole to send skbs
6556 * without having to re-enable interrupts. It's not called while
6557 * the interrupt routine is executing.
6558 */
6559 static void igb_netpoll(struct net_device *netdev)
6560 {
6561 struct igb_adapter *adapter = netdev_priv(netdev);
6562 struct e1000_hw *hw = &adapter->hw;
6563 int i;
6564
6565 if (!adapter->msix_entries) {
6566 struct igb_q_vector *q_vector = adapter->q_vector[0];
6567 igb_irq_disable(adapter);
6568 napi_schedule(&q_vector->napi);
6569 return;
6570 }
6571
6572 for (i = 0; i < adapter->num_q_vectors; i++) {
6573 struct igb_q_vector *q_vector = adapter->q_vector[i];
6574 wr32(E1000_EIMC, q_vector->eims_value);
6575 napi_schedule(&q_vector->napi);
6576 }
6577 }
6578 #endif /* CONFIG_NET_POLL_CONTROLLER */
6579
6580 /**
6581 * igb_io_error_detected - called when PCI error is detected
6582 * @pdev: Pointer to PCI device
6583 * @state: The current pci connection state
6584 *
6585 * This function is called after a PCI bus error affecting
6586 * this device has been detected.
6587 */
6588 static pci_ers_result_t igb_io_error_detected(struct pci_dev *pdev,
6589 pci_channel_state_t state)
6590 {
6591 struct net_device *netdev = pci_get_drvdata(pdev);
6592 struct igb_adapter *adapter = netdev_priv(netdev);
6593
6594 netif_device_detach(netdev);
6595
6596 if (state == pci_channel_io_perm_failure)
6597 return PCI_ERS_RESULT_DISCONNECT;
6598
6599 if (netif_running(netdev))
6600 igb_down(adapter);
6601 pci_disable_device(pdev);
6602
6603 /* Request a slot slot reset. */
6604 return PCI_ERS_RESULT_NEED_RESET;
6605 }
6606
6607 /**
6608 * igb_io_slot_reset - called after the pci bus has been reset.
6609 * @pdev: Pointer to PCI device
6610 *
6611 * Restart the card from scratch, as if from a cold-boot. Implementation
6612 * resembles the first-half of the igb_resume routine.
6613 */
6614 static pci_ers_result_t igb_io_slot_reset(struct pci_dev *pdev)
6615 {
6616 struct net_device *netdev = pci_get_drvdata(pdev);
6617 struct igb_adapter *adapter = netdev_priv(netdev);
6618 struct e1000_hw *hw = &adapter->hw;
6619 pci_ers_result_t result;
6620 int err;
6621
6622 if (pci_enable_device_mem(pdev)) {
6623 dev_err(&pdev->dev,
6624 "Cannot re-enable PCI device after reset.\n");
6625 result = PCI_ERS_RESULT_DISCONNECT;
6626 } else {
6627 pci_set_master(pdev);
6628 pci_restore_state(pdev);
6629 pci_save_state(pdev);
6630
6631 pci_enable_wake(pdev, PCI_D3hot, 0);
6632 pci_enable_wake(pdev, PCI_D3cold, 0);
6633
6634 igb_reset(adapter);
6635 wr32(E1000_WUS, ~0);
6636 result = PCI_ERS_RESULT_RECOVERED;
6637 }
6638
6639 err = pci_cleanup_aer_uncorrect_error_status(pdev);
6640 if (err) {
6641 dev_err(&pdev->dev, "pci_cleanup_aer_uncorrect_error_status "
6642 "failed 0x%0x\n", err);
6643 /* non-fatal, continue */
6644 }
6645
6646 return result;
6647 }
6648
6649 /**
6650 * igb_io_resume - called when traffic can start flowing again.
6651 * @pdev: Pointer to PCI device
6652 *
6653 * This callback is called when the error recovery driver tells us that
6654 * its OK to resume normal operation. Implementation resembles the
6655 * second-half of the igb_resume routine.
6656 */
6657 static void igb_io_resume(struct pci_dev *pdev)
6658 {
6659 struct net_device *netdev = pci_get_drvdata(pdev);
6660 struct igb_adapter *adapter = netdev_priv(netdev);
6661
6662 if (netif_running(netdev)) {
6663 if (igb_up(adapter)) {
6664 dev_err(&pdev->dev, "igb_up failed after reset\n");
6665 return;
6666 }
6667 }
6668
6669 netif_device_attach(netdev);
6670
6671 /* let the f/w know that the h/w is now under the control of the
6672 * driver. */
6673 igb_get_hw_control(adapter);
6674 }
6675
6676 static void igb_rar_set_qsel(struct igb_adapter *adapter, u8 *addr, u32 index,
6677 u8 qsel)
6678 {
6679 u32 rar_low, rar_high;
6680 struct e1000_hw *hw = &adapter->hw;
6681
6682 /* HW expects these in little endian so we reverse the byte order
6683 * from network order (big endian) to little endian
6684 */
6685 rar_low = ((u32) addr[0] | ((u32) addr[1] << 8) |
6686 ((u32) addr[2] << 16) | ((u32) addr[3] << 24));
6687 rar_high = ((u32) addr[4] | ((u32) addr[5] << 8));
6688
6689 /* Indicate to hardware the Address is Valid. */
6690 rar_high |= E1000_RAH_AV;
6691
6692 if (hw->mac.type == e1000_82575)
6693 rar_high |= E1000_RAH_POOL_1 * qsel;
6694 else
6695 rar_high |= E1000_RAH_POOL_1 << qsel;
6696
6697 wr32(E1000_RAL(index), rar_low);
6698 wrfl();
6699 wr32(E1000_RAH(index), rar_high);
6700 wrfl();
6701 }
6702
6703 static int igb_set_vf_mac(struct igb_adapter *adapter,
6704 int vf, unsigned char *mac_addr)
6705 {
6706 struct e1000_hw *hw = &adapter->hw;
6707 /* VF MAC addresses start at end of receive addresses and moves
6708 * torwards the first, as a result a collision should not be possible */
6709 int rar_entry = hw->mac.rar_entry_count - (vf + 1);
6710
6711 memcpy(adapter->vf_data[vf].vf_mac_addresses, mac_addr, ETH_ALEN);
6712
6713 igb_rar_set_qsel(adapter, mac_addr, rar_entry, vf);
6714
6715 return 0;
6716 }
6717
6718 static int igb_ndo_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
6719 {
6720 struct igb_adapter *adapter = netdev_priv(netdev);
6721 if (!is_valid_ether_addr(mac) || (vf >= adapter->vfs_allocated_count))
6722 return -EINVAL;
6723 adapter->vf_data[vf].flags |= IGB_VF_FLAG_PF_SET_MAC;
6724 dev_info(&adapter->pdev->dev, "setting MAC %pM on VF %d\n", mac, vf);
6725 dev_info(&adapter->pdev->dev, "Reload the VF driver to make this"
6726 " change effective.");
6727 if (test_bit(__IGB_DOWN, &adapter->state)) {
6728 dev_warn(&adapter->pdev->dev, "The VF MAC address has been set,"
6729 " but the PF device is not up.\n");
6730 dev_warn(&adapter->pdev->dev, "Bring the PF device up before"
6731 " attempting to use the VF device.\n");
6732 }
6733 return igb_set_vf_mac(adapter, vf, mac);
6734 }
6735
6736 static int igb_link_mbps(int internal_link_speed)
6737 {
6738 switch (internal_link_speed) {
6739 case SPEED_100:
6740 return 100;
6741 case SPEED_1000:
6742 return 1000;
6743 default:
6744 return 0;
6745 }
6746 }
6747
6748 static void igb_set_vf_rate_limit(struct e1000_hw *hw, int vf, int tx_rate,
6749 int link_speed)
6750 {
6751 int rf_dec, rf_int;
6752 u32 bcnrc_val;
6753
6754 if (tx_rate != 0) {
6755 /* Calculate the rate factor values to set */
6756 rf_int = link_speed / tx_rate;
6757 rf_dec = (link_speed - (rf_int * tx_rate));
6758 rf_dec = (rf_dec * (1<<E1000_RTTBCNRC_RF_INT_SHIFT)) / tx_rate;
6759
6760 bcnrc_val = E1000_RTTBCNRC_RS_ENA;
6761 bcnrc_val |= ((rf_int<<E1000_RTTBCNRC_RF_INT_SHIFT) &
6762 E1000_RTTBCNRC_RF_INT_MASK);
6763 bcnrc_val |= (rf_dec & E1000_RTTBCNRC_RF_DEC_MASK);
6764 } else {
6765 bcnrc_val = 0;
6766 }
6767
6768 wr32(E1000_RTTDQSEL, vf); /* vf X uses queue X */
6769 wr32(E1000_RTTBCNRC, bcnrc_val);
6770 }
6771
6772 static void igb_check_vf_rate_limit(struct igb_adapter *adapter)
6773 {
6774 int actual_link_speed, i;
6775 bool reset_rate = false;
6776
6777 /* VF TX rate limit was not set or not supported */
6778 if ((adapter->vf_rate_link_speed == 0) ||
6779 (adapter->hw.mac.type != e1000_82576))
6780 return;
6781
6782 actual_link_speed = igb_link_mbps(adapter->link_speed);
6783 if (actual_link_speed != adapter->vf_rate_link_speed) {
6784 reset_rate = true;
6785 adapter->vf_rate_link_speed = 0;
6786 dev_info(&adapter->pdev->dev,
6787 "Link speed has been changed. VF Transmit "
6788 "rate is disabled\n");
6789 }
6790
6791 for (i = 0; i < adapter->vfs_allocated_count; i++) {
6792 if (reset_rate)
6793 adapter->vf_data[i].tx_rate = 0;
6794
6795 igb_set_vf_rate_limit(&adapter->hw, i,
6796 adapter->vf_data[i].tx_rate,
6797 actual_link_speed);
6798 }
6799 }
6800
6801 static int igb_ndo_set_vf_bw(struct net_device *netdev, int vf, int tx_rate)
6802 {
6803 struct igb_adapter *adapter = netdev_priv(netdev);
6804 struct e1000_hw *hw = &adapter->hw;
6805 int actual_link_speed;
6806
6807 if (hw->mac.type != e1000_82576)
6808 return -EOPNOTSUPP;
6809
6810 actual_link_speed = igb_link_mbps(adapter->link_speed);
6811 if ((vf >= adapter->vfs_allocated_count) ||
6812 (!(rd32(E1000_STATUS) & E1000_STATUS_LU)) ||
6813 (tx_rate < 0) || (tx_rate > actual_link_speed))
6814 return -EINVAL;
6815
6816 adapter->vf_rate_link_speed = actual_link_speed;
6817 adapter->vf_data[vf].tx_rate = (u16)tx_rate;
6818 igb_set_vf_rate_limit(hw, vf, tx_rate, actual_link_speed);
6819
6820 return 0;
6821 }
6822
6823 static int igb_ndo_get_vf_config(struct net_device *netdev,
6824 int vf, struct ifla_vf_info *ivi)
6825 {
6826 struct igb_adapter *adapter = netdev_priv(netdev);
6827 if (vf >= adapter->vfs_allocated_count)
6828 return -EINVAL;
6829 ivi->vf = vf;
6830 memcpy(&ivi->mac, adapter->vf_data[vf].vf_mac_addresses, ETH_ALEN);
6831 ivi->tx_rate = adapter->vf_data[vf].tx_rate;
6832 ivi->vlan = adapter->vf_data[vf].pf_vlan;
6833 ivi->qos = adapter->vf_data[vf].pf_qos;
6834 return 0;
6835 }
6836
6837 static void igb_vmm_control(struct igb_adapter *adapter)
6838 {
6839 struct e1000_hw *hw = &adapter->hw;
6840 u32 reg;
6841
6842 switch (hw->mac.type) {
6843 case e1000_82575:
6844 default:
6845 /* replication is not supported for 82575 */
6846 return;
6847 case e1000_82576:
6848 /* notify HW that the MAC is adding vlan tags */
6849 reg = rd32(E1000_DTXCTL);
6850 reg |= E1000_DTXCTL_VLAN_ADDED;
6851 wr32(E1000_DTXCTL, reg);
6852 case e1000_82580:
6853 /* enable replication vlan tag stripping */
6854 reg = rd32(E1000_RPLOLR);
6855 reg |= E1000_RPLOLR_STRVLAN;
6856 wr32(E1000_RPLOLR, reg);
6857 case e1000_i350:
6858 /* none of the above registers are supported by i350 */
6859 break;
6860 }
6861
6862 if (adapter->vfs_allocated_count) {
6863 igb_vmdq_set_loopback_pf(hw, true);
6864 igb_vmdq_set_replication_pf(hw, true);
6865 igb_vmdq_set_anti_spoofing_pf(hw, true,
6866 adapter->vfs_allocated_count);
6867 } else {
6868 igb_vmdq_set_loopback_pf(hw, false);
6869 igb_vmdq_set_replication_pf(hw, false);
6870 }
6871 }
6872
6873 /* igb_main.c */
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