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Merge remote-tracking branch 'moduleh/module.h-split'
[linux-2.6/next.git] / drivers / net / ethernet / oki-semi / pch_gbe / pch_gbe_main.c
blob72276fe78f8fec4b935c5159791e46d0b367be90
1 /*
2 * Copyright (C) 1999 - 2010 Intel Corporation.
3 * Copyright (C) 2010 OKI SEMICONDUCTOR CO., LTD.
4 *
5 * This code was derived from the Intel e1000e Linux driver.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
19 */
20
21 #include "pch_gbe.h"
22 #include "pch_gbe_api.h"
23 #include <linux/prefetch.h>
24
25 #define DRV_VERSION "1.00"
26 const char pch_driver_version[] = DRV_VERSION;
27
28 #define PCI_DEVICE_ID_INTEL_IOH1_GBE 0x8802 /* Pci device ID */
29 #define PCH_GBE_MAR_ENTRIES 16
30 #define PCH_GBE_SHORT_PKT 64
31 #define DSC_INIT16 0xC000
32 #define PCH_GBE_DMA_ALIGN 0
33 #define PCH_GBE_DMA_PADDING 2
34 #define PCH_GBE_WATCHDOG_PERIOD (1 * HZ) /* watchdog time */
35 #define PCH_GBE_COPYBREAK_DEFAULT 256
36 #define PCH_GBE_PCI_BAR 1
37
38 /* Macros for ML7223 */
39 #define PCI_VENDOR_ID_ROHM 0x10db
40 #define PCI_DEVICE_ID_ROHM_ML7223_GBE 0x8013
41
42 #define PCH_GBE_TX_WEIGHT 64
43 #define PCH_GBE_RX_WEIGHT 64
44 #define PCH_GBE_RX_BUFFER_WRITE 16
45
46 /* Initialize the wake-on-LAN settings */
47 #define PCH_GBE_WL_INIT_SETTING (PCH_GBE_WLC_MP)
48
49 #define PCH_GBE_MAC_RGMII_CTRL_SETTING ( \
50 PCH_GBE_CHIP_TYPE_INTERNAL | \
51 PCH_GBE_RGMII_MODE_RGMII \
52 )
53
54 /* Ethertype field values */
55 #define PCH_GBE_MAX_JUMBO_FRAME_SIZE 10318
56 #define PCH_GBE_FRAME_SIZE_2048 2048
57 #define PCH_GBE_FRAME_SIZE_4096 4096
58 #define PCH_GBE_FRAME_SIZE_8192 8192
59
60 #define PCH_GBE_GET_DESC(R, i, type) (&(((struct type *)((R).desc))[i]))
61 #define PCH_GBE_RX_DESC(R, i) PCH_GBE_GET_DESC(R, i, pch_gbe_rx_desc)
62 #define PCH_GBE_TX_DESC(R, i) PCH_GBE_GET_DESC(R, i, pch_gbe_tx_desc)
63 #define PCH_GBE_DESC_UNUSED(R) \
64 ((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
65 (R)->next_to_clean - (R)->next_to_use - 1)
66
67 /* Pause packet value */
68 #define PCH_GBE_PAUSE_PKT1_VALUE 0x00C28001
69 #define PCH_GBE_PAUSE_PKT2_VALUE 0x00000100
70 #define PCH_GBE_PAUSE_PKT4_VALUE 0x01000888
71 #define PCH_GBE_PAUSE_PKT5_VALUE 0x0000FFFF
72
73 #define PCH_GBE_ETH_ALEN 6
74
75 /* This defines the bits that are set in the Interrupt Mask
76 * Set/Read Register. Each bit is documented below:
77 * o RXT0 = Receiver Timer Interrupt (ring 0)
78 * o TXDW = Transmit Descriptor Written Back
79 * o RXDMT0 = Receive Descriptor Minimum Threshold hit (ring 0)
80 * o RXSEQ = Receive Sequence Error
81 * o LSC = Link Status Change
82 */
83 #define PCH_GBE_INT_ENABLE_MASK ( \
84 PCH_GBE_INT_RX_DMA_CMPLT | \
85 PCH_GBE_INT_RX_DSC_EMP | \
86 PCH_GBE_INT_WOL_DET | \
87 PCH_GBE_INT_TX_CMPLT \
88 )
89
90
91 static unsigned int copybreak __read_mostly = PCH_GBE_COPYBREAK_DEFAULT;
92
93 static int pch_gbe_mdio_read(struct net_device *netdev, int addr, int reg);
94 static void pch_gbe_mdio_write(struct net_device *netdev, int addr, int reg,
95 int data);
96
97 inline void pch_gbe_mac_load_mac_addr(struct pch_gbe_hw *hw)
98 {
99 iowrite32(0x01, &hw->reg->MAC_ADDR_LOAD);
100 }
101
102 /**
103 * pch_gbe_mac_read_mac_addr - Read MAC address
104 * @hw: Pointer to the HW structure
105 * Returns
106 * 0: Successful.
107 */
108 s32 pch_gbe_mac_read_mac_addr(struct pch_gbe_hw *hw)
109 {
110 u32 adr1a, adr1b;
111
112 adr1a = ioread32(&hw->reg->mac_adr[0].high);
113 adr1b = ioread32(&hw->reg->mac_adr[0].low);
114
115 hw->mac.addr[0] = (u8)(adr1a & 0xFF);
116 hw->mac.addr[1] = (u8)((adr1a >> 8) & 0xFF);
117 hw->mac.addr[2] = (u8)((adr1a >> 16) & 0xFF);
118 hw->mac.addr[3] = (u8)((adr1a >> 24) & 0xFF);
119 hw->mac.addr[4] = (u8)(adr1b & 0xFF);
120 hw->mac.addr[5] = (u8)((adr1b >> 8) & 0xFF);
121
122 pr_debug("hw->mac.addr : %pM\n", hw->mac.addr);
123 return 0;
124 }
125
126 /**
127 * pch_gbe_wait_clr_bit - Wait to clear a bit
128 * @reg: Pointer of register
129 * @busy: Busy bit
130 */
131 static void pch_gbe_wait_clr_bit(void *reg, u32 bit)
132 {
133 u32 tmp;
134 /* wait busy */
135 tmp = 1000;
136 while ((ioread32(reg) & bit) && --tmp)
137 cpu_relax();
138 if (!tmp)
139 pr_err("Error: busy bit is not cleared\n");
140 }
141 /**
142 * pch_gbe_mac_mar_set - Set MAC address register
143 * @hw: Pointer to the HW structure
144 * @addr: Pointer to the MAC address
145 * @index: MAC address array register
146 */
147 static void pch_gbe_mac_mar_set(struct pch_gbe_hw *hw, u8 * addr, u32 index)
148 {
149 u32 mar_low, mar_high, adrmask;
150
151 pr_debug("index : 0x%x\n", index);
152
153 /*
154 * HW expects these in little endian so we reverse the byte order
155 * from network order (big endian) to little endian
156 */
157 mar_high = ((u32) addr[0] | ((u32) addr[1] << 8) |
158 ((u32) addr[2] << 16) | ((u32) addr[3] << 24));
159 mar_low = ((u32) addr[4] | ((u32) addr[5] << 8));
160 /* Stop the MAC Address of index. */
161 adrmask = ioread32(&hw->reg->ADDR_MASK);
162 iowrite32((adrmask | (0x0001 << index)), &hw->reg->ADDR_MASK);
163 /* wait busy */
164 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
165 /* Set the MAC address to the MAC address 1A/1B register */
166 iowrite32(mar_high, &hw->reg->mac_adr[index].high);
167 iowrite32(mar_low, &hw->reg->mac_adr[index].low);
168 /* Start the MAC address of index */
169 iowrite32((adrmask & ~(0x0001 << index)), &hw->reg->ADDR_MASK);
170 /* wait busy */
171 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
172 }
173
174 /**
175 * pch_gbe_mac_reset_hw - Reset hardware
176 * @hw: Pointer to the HW structure
177 */
178 static void pch_gbe_mac_reset_hw(struct pch_gbe_hw *hw)
179 {
180 /* Read the MAC address. and store to the private data */
181 pch_gbe_mac_read_mac_addr(hw);
182 iowrite32(PCH_GBE_ALL_RST, &hw->reg->RESET);
183 #ifdef PCH_GBE_MAC_IFOP_RGMII
184 iowrite32(PCH_GBE_MODE_GMII_ETHER, &hw->reg->MODE);
185 #endif
186 pch_gbe_wait_clr_bit(&hw->reg->RESET, PCH_GBE_ALL_RST);
187 /* Setup the receive address */
188 pch_gbe_mac_mar_set(hw, hw->mac.addr, 0);
189 return;
190 }
191
192 /**
193 * pch_gbe_mac_init_rx_addrs - Initialize receive address's
194 * @hw: Pointer to the HW structure
195 * @mar_count: Receive address registers
196 */
197 static void pch_gbe_mac_init_rx_addrs(struct pch_gbe_hw *hw, u16 mar_count)
198 {
199 u32 i;
200
201 /* Setup the receive address */
202 pch_gbe_mac_mar_set(hw, hw->mac.addr, 0);
203
204 /* Zero out the other receive addresses */
205 for (i = 1; i < mar_count; i++) {
206 iowrite32(0, &hw->reg->mac_adr[i].high);
207 iowrite32(0, &hw->reg->mac_adr[i].low);
208 }
209 iowrite32(0xFFFE, &hw->reg->ADDR_MASK);
210 /* wait busy */
211 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
212 }
213
214
215 /**
216 * pch_gbe_mac_mc_addr_list_update - Update Multicast addresses
217 * @hw: Pointer to the HW structure
218 * @mc_addr_list: Array of multicast addresses to program
219 * @mc_addr_count: Number of multicast addresses to program
220 * @mar_used_count: The first MAC Address register free to program
221 * @mar_total_num: Total number of supported MAC Address Registers
222 */
223 static void pch_gbe_mac_mc_addr_list_update(struct pch_gbe_hw *hw,
224 u8 *mc_addr_list, u32 mc_addr_count,
225 u32 mar_used_count, u32 mar_total_num)
226 {
227 u32 i, adrmask;
228
229 /* Load the first set of multicast addresses into the exact
230 * filters (RAR). If there are not enough to fill the RAR
231 * array, clear the filters.
232 */
233 for (i = mar_used_count; i < mar_total_num; i++) {
234 if (mc_addr_count) {
235 pch_gbe_mac_mar_set(hw, mc_addr_list, i);
236 mc_addr_count--;
237 mc_addr_list += PCH_GBE_ETH_ALEN;
238 } else {
239 /* Clear MAC address mask */
240 adrmask = ioread32(&hw->reg->ADDR_MASK);
241 iowrite32((adrmask | (0x0001 << i)),
242 &hw->reg->ADDR_MASK);
243 /* wait busy */
244 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
245 /* Clear MAC address */
246 iowrite32(0, &hw->reg->mac_adr[i].high);
247 iowrite32(0, &hw->reg->mac_adr[i].low);
248 }
249 }
250 }
251
252 /**
253 * pch_gbe_mac_force_mac_fc - Force the MAC's flow control settings
254 * @hw: Pointer to the HW structure
255 * Returns
256 * 0: Successful.
257 * Negative value: Failed.
258 */
259 s32 pch_gbe_mac_force_mac_fc(struct pch_gbe_hw *hw)
260 {
261 struct pch_gbe_mac_info *mac = &hw->mac;
262 u32 rx_fctrl;
263
264 pr_debug("mac->fc = %u\n", mac->fc);
265
266 rx_fctrl = ioread32(&hw->reg->RX_FCTRL);
267
268 switch (mac->fc) {
269 case PCH_GBE_FC_NONE:
270 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
271 mac->tx_fc_enable = false;
272 break;
273 case PCH_GBE_FC_RX_PAUSE:
274 rx_fctrl |= PCH_GBE_FL_CTRL_EN;
275 mac->tx_fc_enable = false;
276 break;
277 case PCH_GBE_FC_TX_PAUSE:
278 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
279 mac->tx_fc_enable = true;
280 break;
281 case PCH_GBE_FC_FULL:
282 rx_fctrl |= PCH_GBE_FL_CTRL_EN;
283 mac->tx_fc_enable = true;
284 break;
285 default:
286 pr_err("Flow control param set incorrectly\n");
287 return -EINVAL;
288 }
289 if (mac->link_duplex == DUPLEX_HALF)
290 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
291 iowrite32(rx_fctrl, &hw->reg->RX_FCTRL);
292 pr_debug("RX_FCTRL reg : 0x%08x mac->tx_fc_enable : %d\n",
293 ioread32(&hw->reg->RX_FCTRL), mac->tx_fc_enable);
294 return 0;
295 }
296
297 /**
298 * pch_gbe_mac_set_wol_event - Set wake-on-lan event
299 * @hw: Pointer to the HW structure
300 * @wu_evt: Wake up event
301 */
302 static void pch_gbe_mac_set_wol_event(struct pch_gbe_hw *hw, u32 wu_evt)
303 {
304 u32 addr_mask;
305
306 pr_debug("wu_evt : 0x%08x ADDR_MASK reg : 0x%08x\n",
307 wu_evt, ioread32(&hw->reg->ADDR_MASK));
308
309 if (wu_evt) {
310 /* Set Wake-On-Lan address mask */
311 addr_mask = ioread32(&hw->reg->ADDR_MASK);
312 iowrite32(addr_mask, &hw->reg->WOL_ADDR_MASK);
313 /* wait busy */
314 pch_gbe_wait_clr_bit(&hw->reg->WOL_ADDR_MASK, PCH_GBE_WLA_BUSY);
315 iowrite32(0, &hw->reg->WOL_ST);
316 iowrite32((wu_evt | PCH_GBE_WLC_WOL_MODE), &hw->reg->WOL_CTRL);
317 iowrite32(0x02, &hw->reg->TCPIP_ACC);
318 iowrite32(PCH_GBE_INT_ENABLE_MASK, &hw->reg->INT_EN);
319 } else {
320 iowrite32(0, &hw->reg->WOL_CTRL);
321 iowrite32(0, &hw->reg->WOL_ST);
322 }
323 return;
324 }
325
326 /**
327 * pch_gbe_mac_ctrl_miim - Control MIIM interface
328 * @hw: Pointer to the HW structure
329 * @addr: Address of PHY
330 * @dir: Operetion. (Write or Read)
331 * @reg: Access register of PHY
332 * @data: Write data.
333 *
334 * Returns: Read date.
335 */
336 u16 pch_gbe_mac_ctrl_miim(struct pch_gbe_hw *hw, u32 addr, u32 dir, u32 reg,
337 u16 data)
338 {
339 u32 data_out = 0;
340 unsigned int i;
341 unsigned long flags;
342
343 spin_lock_irqsave(&hw->miim_lock, flags);
344
345 for (i = 100; i; --i) {
346 if ((ioread32(&hw->reg->MIIM) & PCH_GBE_MIIM_OPER_READY))
347 break;
348 udelay(20);
349 }
350 if (i == 0) {
351 pr_err("pch-gbe.miim won't go Ready\n");
352 spin_unlock_irqrestore(&hw->miim_lock, flags);
353 return 0; /* No way to indicate timeout error */
354 }
355 iowrite32(((reg << PCH_GBE_MIIM_REG_ADDR_SHIFT) |
356 (addr << PCH_GBE_MIIM_PHY_ADDR_SHIFT) |
357 dir | data), &hw->reg->MIIM);
358 for (i = 0; i < 100; i++) {
359 udelay(20);
360 data_out = ioread32(&hw->reg->MIIM);
361 if ((data_out & PCH_GBE_MIIM_OPER_READY))
362 break;
363 }
364 spin_unlock_irqrestore(&hw->miim_lock, flags);
365
366 pr_debug("PHY %s: reg=%d, data=0x%04X\n",
367 dir == PCH_GBE_MIIM_OPER_READ ? "READ" : "WRITE", reg,
368 dir == PCH_GBE_MIIM_OPER_READ ? data_out : data);
369 return (u16) data_out;
370 }
371
372 /**
373 * pch_gbe_mac_set_pause_packet - Set pause packet
374 * @hw: Pointer to the HW structure
375 */
376 static void pch_gbe_mac_set_pause_packet(struct pch_gbe_hw *hw)
377 {
378 unsigned long tmp2, tmp3;
379
380 /* Set Pause packet */
381 tmp2 = hw->mac.addr[1];
382 tmp2 = (tmp2 << 8) | hw->mac.addr[0];
383 tmp2 = PCH_GBE_PAUSE_PKT2_VALUE | (tmp2 << 16);
384
385 tmp3 = hw->mac.addr[5];
386 tmp3 = (tmp3 << 8) | hw->mac.addr[4];
387 tmp3 = (tmp3 << 8) | hw->mac.addr[3];
388 tmp3 = (tmp3 << 8) | hw->mac.addr[2];
389
390 iowrite32(PCH_GBE_PAUSE_PKT1_VALUE, &hw->reg->PAUSE_PKT1);
391 iowrite32(tmp2, &hw->reg->PAUSE_PKT2);
392 iowrite32(tmp3, &hw->reg->PAUSE_PKT3);
393 iowrite32(PCH_GBE_PAUSE_PKT4_VALUE, &hw->reg->PAUSE_PKT4);
394 iowrite32(PCH_GBE_PAUSE_PKT5_VALUE, &hw->reg->PAUSE_PKT5);
395
396 /* Transmit Pause Packet */
397 iowrite32(PCH_GBE_PS_PKT_RQ, &hw->reg->PAUSE_REQ);
398
399 pr_debug("PAUSE_PKT1-5 reg : 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n",
400 ioread32(&hw->reg->PAUSE_PKT1), ioread32(&hw->reg->PAUSE_PKT2),
401 ioread32(&hw->reg->PAUSE_PKT3), ioread32(&hw->reg->PAUSE_PKT4),
402 ioread32(&hw->reg->PAUSE_PKT5));
403
404 return;
405 }
406
407
408 /**
409 * pch_gbe_alloc_queues - Allocate memory for all rings
410 * @adapter: Board private structure to initialize
411 * Returns
412 * 0: Successfully
413 * Negative value: Failed
414 */
415 static int pch_gbe_alloc_queues(struct pch_gbe_adapter *adapter)
416 {
417 int size;
418
419 size = (int)sizeof(struct pch_gbe_tx_ring);
420 adapter->tx_ring = kzalloc(size, GFP_KERNEL);
421 if (!adapter->tx_ring)
422 return -ENOMEM;
423 size = (int)sizeof(struct pch_gbe_rx_ring);
424 adapter->rx_ring = kzalloc(size, GFP_KERNEL);
425 if (!adapter->rx_ring) {
426 kfree(adapter->tx_ring);
427 return -ENOMEM;
428 }
429 return 0;
430 }
431
432 /**
433 * pch_gbe_init_stats - Initialize status
434 * @adapter: Board private structure to initialize
435 */
436 static void pch_gbe_init_stats(struct pch_gbe_adapter *adapter)
437 {
438 memset(&adapter->stats, 0, sizeof(adapter->stats));
439 return;
440 }
441
442 /**
443 * pch_gbe_init_phy - Initialize PHY
444 * @adapter: Board private structure to initialize
445 * Returns
446 * 0: Successfully
447 * Negative value: Failed
448 */
449 static int pch_gbe_init_phy(struct pch_gbe_adapter *adapter)
450 {
451 struct net_device *netdev = adapter->netdev;
452 u32 addr;
453 u16 bmcr, stat;
454
455 /* Discover phy addr by searching addrs in order {1,0,2,..., 31} */
456 for (addr = 0; addr < PCH_GBE_PHY_REGS_LEN; addr++) {
457 adapter->mii.phy_id = (addr == 0) ? 1 : (addr == 1) ? 0 : addr;
458 bmcr = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMCR);
459 stat = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMSR);
460 stat = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMSR);
461 if (!((bmcr == 0xFFFF) || ((stat == 0) && (bmcr == 0))))
462 break;
463 }
464 adapter->hw.phy.addr = adapter->mii.phy_id;
465 pr_debug("phy_addr = %d\n", adapter->mii.phy_id);
466 if (addr == 32)
467 return -EAGAIN;
468 /* Selected the phy and isolate the rest */
469 for (addr = 0; addr < PCH_GBE_PHY_REGS_LEN; addr++) {
470 if (addr != adapter->mii.phy_id) {
471 pch_gbe_mdio_write(netdev, addr, MII_BMCR,
472 BMCR_ISOLATE);
473 } else {
474 bmcr = pch_gbe_mdio_read(netdev, addr, MII_BMCR);
475 pch_gbe_mdio_write(netdev, addr, MII_BMCR,
476 bmcr & ~BMCR_ISOLATE);
477 }
478 }
479
480 /* MII setup */
481 adapter->mii.phy_id_mask = 0x1F;
482 adapter->mii.reg_num_mask = 0x1F;
483 adapter->mii.dev = adapter->netdev;
484 adapter->mii.mdio_read = pch_gbe_mdio_read;
485 adapter->mii.mdio_write = pch_gbe_mdio_write;
486 adapter->mii.supports_gmii = mii_check_gmii_support(&adapter->mii);
487 return 0;
488 }
489
490 /**
491 * pch_gbe_mdio_read - The read function for mii
492 * @netdev: Network interface device structure
493 * @addr: Phy ID
494 * @reg: Access location
495 * Returns
496 * 0: Successfully
497 * Negative value: Failed
498 */
499 static int pch_gbe_mdio_read(struct net_device *netdev, int addr, int reg)
500 {
501 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
502 struct pch_gbe_hw *hw = &adapter->hw;
503
504 return pch_gbe_mac_ctrl_miim(hw, addr, PCH_GBE_HAL_MIIM_READ, reg,
505 (u16) 0);
506 }
507
508 /**
509 * pch_gbe_mdio_write - The write function for mii
510 * @netdev: Network interface device structure
511 * @addr: Phy ID (not used)
512 * @reg: Access location
513 * @data: Write data
514 */
515 static void pch_gbe_mdio_write(struct net_device *netdev,
516 int addr, int reg, int data)
517 {
518 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
519 struct pch_gbe_hw *hw = &adapter->hw;
520
521 pch_gbe_mac_ctrl_miim(hw, addr, PCH_GBE_HAL_MIIM_WRITE, reg, data);
522 }
523
524 /**
525 * pch_gbe_reset_task - Reset processing at the time of transmission timeout
526 * @work: Pointer of board private structure
527 */
528 static void pch_gbe_reset_task(struct work_struct *work)
529 {
530 struct pch_gbe_adapter *adapter;
531 adapter = container_of(work, struct pch_gbe_adapter, reset_task);
532
533 rtnl_lock();
534 pch_gbe_reinit_locked(adapter);
535 rtnl_unlock();
536 }
537
538 /**
539 * pch_gbe_reinit_locked- Re-initialization
540 * @adapter: Board private structure
541 */
542 void pch_gbe_reinit_locked(struct pch_gbe_adapter *adapter)
543 {
544 pch_gbe_down(adapter);
545 pch_gbe_up(adapter);
546 }
547
548 /**
549 * pch_gbe_reset - Reset GbE
550 * @adapter: Board private structure
551 */
552 void pch_gbe_reset(struct pch_gbe_adapter *adapter)
553 {
554 pch_gbe_mac_reset_hw(&adapter->hw);
555 /* Setup the receive address. */
556 pch_gbe_mac_init_rx_addrs(&adapter->hw, PCH_GBE_MAR_ENTRIES);
557 if (pch_gbe_hal_init_hw(&adapter->hw))
558 pr_err("Hardware Error\n");
559 }
560
561 /**
562 * pch_gbe_free_irq - Free an interrupt
563 * @adapter: Board private structure
564 */
565 static void pch_gbe_free_irq(struct pch_gbe_adapter *adapter)
566 {
567 struct net_device *netdev = adapter->netdev;
568
569 free_irq(adapter->pdev->irq, netdev);
570 if (adapter->have_msi) {
571 pci_disable_msi(adapter->pdev);
572 pr_debug("call pci_disable_msi\n");
573 }
574 }
575
576 /**
577 * pch_gbe_irq_disable - Mask off interrupt generation on the NIC
578 * @adapter: Board private structure
579 */
580 static void pch_gbe_irq_disable(struct pch_gbe_adapter *adapter)
581 {
582 struct pch_gbe_hw *hw = &adapter->hw;
583
584 atomic_inc(&adapter->irq_sem);
585 iowrite32(0, &hw->reg->INT_EN);
586 ioread32(&hw->reg->INT_ST);
587 synchronize_irq(adapter->pdev->irq);
588
589 pr_debug("INT_EN reg : 0x%08x\n", ioread32(&hw->reg->INT_EN));
590 }
591
592 /**
593 * pch_gbe_irq_enable - Enable default interrupt generation settings
594 * @adapter: Board private structure
595 */
596 static void pch_gbe_irq_enable(struct pch_gbe_adapter *adapter)
597 {
598 struct pch_gbe_hw *hw = &adapter->hw;
599
600 if (likely(atomic_dec_and_test(&adapter->irq_sem)))
601 iowrite32(PCH_GBE_INT_ENABLE_MASK, &hw->reg->INT_EN);
602 ioread32(&hw->reg->INT_ST);
603 pr_debug("INT_EN reg : 0x%08x\n", ioread32(&hw->reg->INT_EN));
604 }
605
606
607
608 /**
609 * pch_gbe_setup_tctl - configure the Transmit control registers
610 * @adapter: Board private structure
611 */
612 static void pch_gbe_setup_tctl(struct pch_gbe_adapter *adapter)
613 {
614 struct pch_gbe_hw *hw = &adapter->hw;
615 u32 tx_mode, tcpip;
616
617 tx_mode = PCH_GBE_TM_LONG_PKT |
618 PCH_GBE_TM_ST_AND_FD |
619 PCH_GBE_TM_SHORT_PKT |
620 PCH_GBE_TM_TH_TX_STRT_8 |
621 PCH_GBE_TM_TH_ALM_EMP_4 | PCH_GBE_TM_TH_ALM_FULL_8;
622
623 iowrite32(tx_mode, &hw->reg->TX_MODE);
624
625 tcpip = ioread32(&hw->reg->TCPIP_ACC);
626 tcpip |= PCH_GBE_TX_TCPIPACC_EN;
627 iowrite32(tcpip, &hw->reg->TCPIP_ACC);
628 return;
629 }
630
631 /**
632 * pch_gbe_configure_tx - Configure Transmit Unit after Reset
633 * @adapter: Board private structure
634 */
635 static void pch_gbe_configure_tx(struct pch_gbe_adapter *adapter)
636 {
637 struct pch_gbe_hw *hw = &adapter->hw;
638 u32 tdba, tdlen, dctrl;
639
640 pr_debug("dma addr = 0x%08llx size = 0x%08x\n",
641 (unsigned long long)adapter->tx_ring->dma,
642 adapter->tx_ring->size);
643
644 /* Setup the HW Tx Head and Tail descriptor pointers */
645 tdba = adapter->tx_ring->dma;
646 tdlen = adapter->tx_ring->size - 0x10;
647 iowrite32(tdba, &hw->reg->TX_DSC_BASE);
648 iowrite32(tdlen, &hw->reg->TX_DSC_SIZE);
649 iowrite32(tdba, &hw->reg->TX_DSC_SW_P);
650
651 /* Enables Transmission DMA */
652 dctrl = ioread32(&hw->reg->DMA_CTRL);
653 dctrl |= PCH_GBE_TX_DMA_EN;
654 iowrite32(dctrl, &hw->reg->DMA_CTRL);
655 }
656
657 /**
658 * pch_gbe_setup_rctl - Configure the receive control registers
659 * @adapter: Board private structure
660 */
661 static void pch_gbe_setup_rctl(struct pch_gbe_adapter *adapter)
662 {
663 struct net_device *netdev = adapter->netdev;
664 struct pch_gbe_hw *hw = &adapter->hw;
665 u32 rx_mode, tcpip;
666
667 rx_mode = PCH_GBE_ADD_FIL_EN | PCH_GBE_MLT_FIL_EN |
668 PCH_GBE_RH_ALM_EMP_4 | PCH_GBE_RH_ALM_FULL_4 | PCH_GBE_RH_RD_TRG_8;
669
670 iowrite32(rx_mode, &hw->reg->RX_MODE);
671
672 tcpip = ioread32(&hw->reg->TCPIP_ACC);
673
674 if (netdev->features & NETIF_F_RXCSUM) {
675 tcpip &= ~PCH_GBE_RX_TCPIPACC_OFF;
676 tcpip |= PCH_GBE_RX_TCPIPACC_EN;
677 } else {
678 tcpip |= PCH_GBE_RX_TCPIPACC_OFF;
679 tcpip &= ~PCH_GBE_RX_TCPIPACC_EN;
680 }
681 iowrite32(tcpip, &hw->reg->TCPIP_ACC);
682 return;
683 }
684
685 /**
686 * pch_gbe_configure_rx - Configure Receive Unit after Reset
687 * @adapter: Board private structure
688 */
689 static void pch_gbe_configure_rx(struct pch_gbe_adapter *adapter)
690 {
691 struct pch_gbe_hw *hw = &adapter->hw;
692 u32 rdba, rdlen, rctl, rxdma;
693
694 pr_debug("dma adr = 0x%08llx size = 0x%08x\n",
695 (unsigned long long)adapter->rx_ring->dma,
696 adapter->rx_ring->size);
697
698 pch_gbe_mac_force_mac_fc(hw);
699
700 /* Disables Receive MAC */
701 rctl = ioread32(&hw->reg->MAC_RX_EN);
702 iowrite32((rctl & ~PCH_GBE_MRE_MAC_RX_EN), &hw->reg->MAC_RX_EN);
703
704 /* Disables Receive DMA */
705 rxdma = ioread32(&hw->reg->DMA_CTRL);
706 rxdma &= ~PCH_GBE_RX_DMA_EN;
707 iowrite32(rxdma, &hw->reg->DMA_CTRL);
708
709 pr_debug("MAC_RX_EN reg = 0x%08x DMA_CTRL reg = 0x%08x\n",
710 ioread32(&hw->reg->MAC_RX_EN),
711 ioread32(&hw->reg->DMA_CTRL));
712
713 /* Setup the HW Rx Head and Tail Descriptor Pointers and
714 * the Base and Length of the Rx Descriptor Ring */
715 rdba = adapter->rx_ring->dma;
716 rdlen = adapter->rx_ring->size - 0x10;
717 iowrite32(rdba, &hw->reg->RX_DSC_BASE);
718 iowrite32(rdlen, &hw->reg->RX_DSC_SIZE);
719 iowrite32((rdba + rdlen), &hw->reg->RX_DSC_SW_P);
720
721 /* Enables Receive DMA */
722 rxdma = ioread32(&hw->reg->DMA_CTRL);
723 rxdma |= PCH_GBE_RX_DMA_EN;
724 iowrite32(rxdma, &hw->reg->DMA_CTRL);
725 /* Enables Receive */
726 iowrite32(PCH_GBE_MRE_MAC_RX_EN, &hw->reg->MAC_RX_EN);
727 }
728
729 /**
730 * pch_gbe_unmap_and_free_tx_resource - Unmap and free tx socket buffer
731 * @adapter: Board private structure
732 * @buffer_info: Buffer information structure
733 */
734 static void pch_gbe_unmap_and_free_tx_resource(
735 struct pch_gbe_adapter *adapter, struct pch_gbe_buffer *buffer_info)
736 {
737 if (buffer_info->mapped) {
738 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
739 buffer_info->length, DMA_TO_DEVICE);
740 buffer_info->mapped = false;
741 }
742 if (buffer_info->skb) {
743 dev_kfree_skb_any(buffer_info->skb);
744 buffer_info->skb = NULL;
745 }
746 }
747
748 /**
749 * pch_gbe_unmap_and_free_rx_resource - Unmap and free rx socket buffer
750 * @adapter: Board private structure
751 * @buffer_info: Buffer information structure
752 */
753 static void pch_gbe_unmap_and_free_rx_resource(
754 struct pch_gbe_adapter *adapter,
755 struct pch_gbe_buffer *buffer_info)
756 {
757 if (buffer_info->mapped) {
758 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
759 buffer_info->length, DMA_FROM_DEVICE);
760 buffer_info->mapped = false;
761 }
762 if (buffer_info->skb) {
763 dev_kfree_skb_any(buffer_info->skb);
764 buffer_info->skb = NULL;
765 }
766 }
767
768 /**
769 * pch_gbe_clean_tx_ring - Free Tx Buffers
770 * @adapter: Board private structure
771 * @tx_ring: Ring to be cleaned
772 */
773 static void pch_gbe_clean_tx_ring(struct pch_gbe_adapter *adapter,
774 struct pch_gbe_tx_ring *tx_ring)
775 {
776 struct pch_gbe_hw *hw = &adapter->hw;
777 struct pch_gbe_buffer *buffer_info;
778 unsigned long size;
779 unsigned int i;
780
781 /* Free all the Tx ring sk_buffs */
782 for (i = 0; i < tx_ring->count; i++) {
783 buffer_info = &tx_ring->buffer_info[i];
784 pch_gbe_unmap_and_free_tx_resource(adapter, buffer_info);
785 }
786 pr_debug("call pch_gbe_unmap_and_free_tx_resource() %d count\n", i);
787
788 size = (unsigned long)sizeof(struct pch_gbe_buffer) * tx_ring->count;
789 memset(tx_ring->buffer_info, 0, size);
790
791 /* Zero out the descriptor ring */
792 memset(tx_ring->desc, 0, tx_ring->size);
793 tx_ring->next_to_use = 0;
794 tx_ring->next_to_clean = 0;
795 iowrite32(tx_ring->dma, &hw->reg->TX_DSC_HW_P);
796 iowrite32((tx_ring->size - 0x10), &hw->reg->TX_DSC_SIZE);
797 }
798
799 /**
800 * pch_gbe_clean_rx_ring - Free Rx Buffers
801 * @adapter: Board private structure
802 * @rx_ring: Ring to free buffers from
803 */
804 static void
805 pch_gbe_clean_rx_ring(struct pch_gbe_adapter *adapter,
806 struct pch_gbe_rx_ring *rx_ring)
807 {
808 struct pch_gbe_hw *hw = &adapter->hw;
809 struct pch_gbe_buffer *buffer_info;
810 unsigned long size;
811 unsigned int i;
812
813 /* Free all the Rx ring sk_buffs */
814 for (i = 0; i < rx_ring->count; i++) {
815 buffer_info = &rx_ring->buffer_info[i];
816 pch_gbe_unmap_and_free_rx_resource(adapter, buffer_info);
817 }
818 pr_debug("call pch_gbe_unmap_and_free_rx_resource() %d count\n", i);
819 size = (unsigned long)sizeof(struct pch_gbe_buffer) * rx_ring->count;
820 memset(rx_ring->buffer_info, 0, size);
821
822 /* Zero out the descriptor ring */
823 memset(rx_ring->desc, 0, rx_ring->size);
824 rx_ring->next_to_clean = 0;
825 rx_ring->next_to_use = 0;
826 iowrite32(rx_ring->dma, &hw->reg->RX_DSC_HW_P);
827 iowrite32((rx_ring->size - 0x10), &hw->reg->RX_DSC_SIZE);
828 }
829
830 static void pch_gbe_set_rgmii_ctrl(struct pch_gbe_adapter *adapter, u16 speed,
831 u16 duplex)
832 {
833 struct pch_gbe_hw *hw = &adapter->hw;
834 unsigned long rgmii = 0;
835
836 /* Set the RGMII control. */
837 #ifdef PCH_GBE_MAC_IFOP_RGMII
838 switch (speed) {
839 case SPEED_10:
840 rgmii = (PCH_GBE_RGMII_RATE_2_5M |
841 PCH_GBE_MAC_RGMII_CTRL_SETTING);
842 break;
843 case SPEED_100:
844 rgmii = (PCH_GBE_RGMII_RATE_25M |
845 PCH_GBE_MAC_RGMII_CTRL_SETTING);
846 break;
847 case SPEED_1000:
848 rgmii = (PCH_GBE_RGMII_RATE_125M |
849 PCH_GBE_MAC_RGMII_CTRL_SETTING);
850 break;
851 }
852 iowrite32(rgmii, &hw->reg->RGMII_CTRL);
853 #else /* GMII */
854 rgmii = 0;
855 iowrite32(rgmii, &hw->reg->RGMII_CTRL);
856 #endif
857 }
858 static void pch_gbe_set_mode(struct pch_gbe_adapter *adapter, u16 speed,
859 u16 duplex)
860 {
861 struct net_device *netdev = adapter->netdev;
862 struct pch_gbe_hw *hw = &adapter->hw;
863 unsigned long mode = 0;
864
865 /* Set the communication mode */
866 switch (speed) {
867 case SPEED_10:
868 mode = PCH_GBE_MODE_MII_ETHER;
869 netdev->tx_queue_len = 10;
870 break;
871 case SPEED_100:
872 mode = PCH_GBE_MODE_MII_ETHER;
873 netdev->tx_queue_len = 100;
874 break;
875 case SPEED_1000:
876 mode = PCH_GBE_MODE_GMII_ETHER;
877 break;
878 }
879 if (duplex == DUPLEX_FULL)
880 mode |= PCH_GBE_MODE_FULL_DUPLEX;
881 else
882 mode |= PCH_GBE_MODE_HALF_DUPLEX;
883 iowrite32(mode, &hw->reg->MODE);
884 }
885
886 /**
887 * pch_gbe_watchdog - Watchdog process
888 * @data: Board private structure
889 */
890 static void pch_gbe_watchdog(unsigned long data)
891 {
892 struct pch_gbe_adapter *adapter = (struct pch_gbe_adapter *)data;
893 struct net_device *netdev = adapter->netdev;
894 struct pch_gbe_hw *hw = &adapter->hw;
895
896 pr_debug("right now = %ld\n", jiffies);
897
898 pch_gbe_update_stats(adapter);
899 if ((mii_link_ok(&adapter->mii)) && (!netif_carrier_ok(netdev))) {
900 struct ethtool_cmd cmd = { .cmd = ETHTOOL_GSET };
901 netdev->tx_queue_len = adapter->tx_queue_len;
902 /* mii library handles link maintenance tasks */
903 if (mii_ethtool_gset(&adapter->mii, &cmd)) {
904 pr_err("ethtool get setting Error\n");
905 mod_timer(&adapter->watchdog_timer,
906 round_jiffies(jiffies +
907 PCH_GBE_WATCHDOG_PERIOD));
908 return;
909 }
910 hw->mac.link_speed = ethtool_cmd_speed(&cmd);
911 hw->mac.link_duplex = cmd.duplex;
912 /* Set the RGMII control. */
913 pch_gbe_set_rgmii_ctrl(adapter, hw->mac.link_speed,
914 hw->mac.link_duplex);
915 /* Set the communication mode */
916 pch_gbe_set_mode(adapter, hw->mac.link_speed,
917 hw->mac.link_duplex);
918 netdev_dbg(netdev,
919 "Link is Up %d Mbps %s-Duplex\n",
920 hw->mac.link_speed,
921 cmd.duplex == DUPLEX_FULL ? "Full" : "Half");
922 netif_carrier_on(netdev);
923 netif_wake_queue(netdev);
924 } else if ((!mii_link_ok(&adapter->mii)) &&
925 (netif_carrier_ok(netdev))) {
926 netdev_dbg(netdev, "NIC Link is Down\n");
927 hw->mac.link_speed = SPEED_10;
928 hw->mac.link_duplex = DUPLEX_HALF;
929 netif_carrier_off(netdev);
930 netif_stop_queue(netdev);
931 }
932 mod_timer(&adapter->watchdog_timer,
933 round_jiffies(jiffies + PCH_GBE_WATCHDOG_PERIOD));
934 }
935
936 /**
937 * pch_gbe_tx_queue - Carry out queuing of the transmission data
938 * @adapter: Board private structure
939 * @tx_ring: Tx descriptor ring structure
940 * @skb: Sockt buffer structure
941 */
942 static void pch_gbe_tx_queue(struct pch_gbe_adapter *adapter,
943 struct pch_gbe_tx_ring *tx_ring,
944 struct sk_buff *skb)
945 {
946 struct pch_gbe_hw *hw = &adapter->hw;
947 struct pch_gbe_tx_desc *tx_desc;
948 struct pch_gbe_buffer *buffer_info;
949 struct sk_buff *tmp_skb;
950 unsigned int frame_ctrl;
951 unsigned int ring_num;
952 unsigned long flags;
953
954 /*-- Set frame control --*/
955 frame_ctrl = 0;
956 if (unlikely(skb->len < PCH_GBE_SHORT_PKT))
957 frame_ctrl |= PCH_GBE_TXD_CTRL_APAD;
958 if (skb->ip_summed == CHECKSUM_NONE)
959 frame_ctrl |= PCH_GBE_TXD_CTRL_TCPIP_ACC_OFF;
960
961 /* Performs checksum processing */
962 /*
963 * It is because the hardware accelerator does not support a checksum,
964 * when the received data size is less than 64 bytes.
965 */
966 if (skb->len < PCH_GBE_SHORT_PKT && skb->ip_summed != CHECKSUM_NONE) {
967 frame_ctrl |= PCH_GBE_TXD_CTRL_APAD |
968 PCH_GBE_TXD_CTRL_TCPIP_ACC_OFF;
969 if (skb->protocol == htons(ETH_P_IP)) {
970 struct iphdr *iph = ip_hdr(skb);
971 unsigned int offset;
972 iph->check = 0;
973 iph->check = ip_fast_csum((u8 *) iph, iph->ihl);
974 offset = skb_transport_offset(skb);
975 if (iph->protocol == IPPROTO_TCP) {
976 skb->csum = 0;
977 tcp_hdr(skb)->check = 0;
978 skb->csum = skb_checksum(skb, offset,
979 skb->len - offset, 0);
980 tcp_hdr(skb)->check =
981 csum_tcpudp_magic(iph->saddr,
982 iph->daddr,
983 skb->len - offset,
984 IPPROTO_TCP,
985 skb->csum);
986 } else if (iph->protocol == IPPROTO_UDP) {
987 skb->csum = 0;
988 udp_hdr(skb)->check = 0;
989 skb->csum =
990 skb_checksum(skb, offset,
991 skb->len - offset, 0);
992 udp_hdr(skb)->check =
993 csum_tcpudp_magic(iph->saddr,
994 iph->daddr,
995 skb->len - offset,
996 IPPROTO_UDP,
997 skb->csum);
998 }
999 }
1000 }
1001 spin_lock_irqsave(&tx_ring->tx_lock, flags);
1002 ring_num = tx_ring->next_to_use;
1003 if (unlikely((ring_num + 1) == tx_ring->count))
1004 tx_ring->next_to_use = 0;
1005 else
1006 tx_ring->next_to_use = ring_num + 1;
1007
1008 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1009 buffer_info = &tx_ring->buffer_info[ring_num];
1010 tmp_skb = buffer_info->skb;
1011
1012 /* [Header:14][payload] ---> [Header:14][paddong:2][payload] */
1013 memcpy(tmp_skb->data, skb->data, ETH_HLEN);
1014 tmp_skb->data[ETH_HLEN] = 0x00;
1015 tmp_skb->data[ETH_HLEN + 1] = 0x00;
1016 tmp_skb->len = skb->len;
1017 memcpy(&tmp_skb->data[ETH_HLEN + 2], &skb->data[ETH_HLEN],
1018 (skb->len - ETH_HLEN));
1019 /*-- Set Buffer information --*/
1020 buffer_info->length = tmp_skb->len;
1021 buffer_info->dma = dma_map_single(&adapter->pdev->dev, tmp_skb->data,
1022 buffer_info->length,
1023 DMA_TO_DEVICE);
1024 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) {
1025 pr_err("TX DMA map failed\n");
1026 buffer_info->dma = 0;
1027 buffer_info->time_stamp = 0;
1028 tx_ring->next_to_use = ring_num;
1029 return;
1030 }
1031 buffer_info->mapped = true;
1032 buffer_info->time_stamp = jiffies;
1033
1034 /*-- Set Tx descriptor --*/
1035 tx_desc = PCH_GBE_TX_DESC(*tx_ring, ring_num);
1036 tx_desc->buffer_addr = (buffer_info->dma);
1037 tx_desc->length = (tmp_skb->len);
1038 tx_desc->tx_words_eob = ((tmp_skb->len + 3));
1039 tx_desc->tx_frame_ctrl = (frame_ctrl);
1040 tx_desc->gbec_status = (DSC_INIT16);
1041
1042 if (unlikely(++ring_num == tx_ring->count))
1043 ring_num = 0;
1044
1045 /* Update software pointer of TX descriptor */
1046 iowrite32(tx_ring->dma +
1047 (int)sizeof(struct pch_gbe_tx_desc) * ring_num,
1048 &hw->reg->TX_DSC_SW_P);
1049 dev_kfree_skb_any(skb);
1050 }
1051
1052 /**
1053 * pch_gbe_update_stats - Update the board statistics counters
1054 * @adapter: Board private structure
1055 */
1056 void pch_gbe_update_stats(struct pch_gbe_adapter *adapter)
1057 {
1058 struct net_device *netdev = adapter->netdev;
1059 struct pci_dev *pdev = adapter->pdev;
1060 struct pch_gbe_hw_stats *stats = &adapter->stats;
1061 unsigned long flags;
1062
1063 /*
1064 * Prevent stats update while adapter is being reset, or if the pci
1065 * connection is down.
1066 */
1067 if ((pdev->error_state) && (pdev->error_state != pci_channel_io_normal))
1068 return;
1069
1070 spin_lock_irqsave(&adapter->stats_lock, flags);
1071
1072 /* Update device status "adapter->stats" */
1073 stats->rx_errors = stats->rx_crc_errors + stats->rx_frame_errors;
1074 stats->tx_errors = stats->tx_length_errors +
1075 stats->tx_aborted_errors +
1076 stats->tx_carrier_errors + stats->tx_timeout_count;
1077
1078 /* Update network device status "adapter->net_stats" */
1079 netdev->stats.rx_packets = stats->rx_packets;
1080 netdev->stats.rx_bytes = stats->rx_bytes;
1081 netdev->stats.rx_dropped = stats->rx_dropped;
1082 netdev->stats.tx_packets = stats->tx_packets;
1083 netdev->stats.tx_bytes = stats->tx_bytes;
1084 netdev->stats.tx_dropped = stats->tx_dropped;
1085 /* Fill out the OS statistics structure */
1086 netdev->stats.multicast = stats->multicast;
1087 netdev->stats.collisions = stats->collisions;
1088 /* Rx Errors */
1089 netdev->stats.rx_errors = stats->rx_errors;
1090 netdev->stats.rx_crc_errors = stats->rx_crc_errors;
1091 netdev->stats.rx_frame_errors = stats->rx_frame_errors;
1092 /* Tx Errors */
1093 netdev->stats.tx_errors = stats->tx_errors;
1094 netdev->stats.tx_aborted_errors = stats->tx_aborted_errors;
1095 netdev->stats.tx_carrier_errors = stats->tx_carrier_errors;
1096
1097 spin_unlock_irqrestore(&adapter->stats_lock, flags);
1098 }
1099
1100 /**
1101 * pch_gbe_intr - Interrupt Handler
1102 * @irq: Interrupt number
1103 * @data: Pointer to a network interface device structure
1104 * Returns
1105 * - IRQ_HANDLED: Our interrupt
1106 * - IRQ_NONE: Not our interrupt
1107 */
1108 static irqreturn_t pch_gbe_intr(int irq, void *data)
1109 {
1110 struct net_device *netdev = data;
1111 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1112 struct pch_gbe_hw *hw = &adapter->hw;
1113 u32 int_st;
1114 u32 int_en;
1115
1116 /* Check request status */
1117 int_st = ioread32(&hw->reg->INT_ST);
1118 int_st = int_st & ioread32(&hw->reg->INT_EN);
1119 /* When request status is no interruption factor */
1120 if (unlikely(!int_st))
1121 return IRQ_NONE; /* Not our interrupt. End processing. */
1122 pr_debug("%s occur int_st = 0x%08x\n", __func__, int_st);
1123 if (int_st & PCH_GBE_INT_RX_FRAME_ERR)
1124 adapter->stats.intr_rx_frame_err_count++;
1125 if (int_st & PCH_GBE_INT_RX_FIFO_ERR)
1126 adapter->stats.intr_rx_fifo_err_count++;
1127 if (int_st & PCH_GBE_INT_RX_DMA_ERR)
1128 adapter->stats.intr_rx_dma_err_count++;
1129 if (int_st & PCH_GBE_INT_TX_FIFO_ERR)
1130 adapter->stats.intr_tx_fifo_err_count++;
1131 if (int_st & PCH_GBE_INT_TX_DMA_ERR)
1132 adapter->stats.intr_tx_dma_err_count++;
1133 if (int_st & PCH_GBE_INT_TCPIP_ERR)
1134 adapter->stats.intr_tcpip_err_count++;
1135 /* When Rx descriptor is empty */
1136 if ((int_st & PCH_GBE_INT_RX_DSC_EMP)) {
1137 adapter->stats.intr_rx_dsc_empty_count++;
1138 pr_err("Rx descriptor is empty\n");
1139 int_en = ioread32(&hw->reg->INT_EN);
1140 iowrite32((int_en & ~PCH_GBE_INT_RX_DSC_EMP), &hw->reg->INT_EN);
1141 if (hw->mac.tx_fc_enable) {
1142 /* Set Pause packet */
1143 pch_gbe_mac_set_pause_packet(hw);
1144 }
1145 if ((int_en & (PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT))
1146 == 0) {
1147 return IRQ_HANDLED;
1148 }
1149 }
1150
1151 /* When request status is Receive interruption */
1152 if ((int_st & (PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT))) {
1153 if (likely(napi_schedule_prep(&adapter->napi))) {
1154 /* Enable only Rx Descriptor empty */
1155 atomic_inc(&adapter->irq_sem);
1156 int_en = ioread32(&hw->reg->INT_EN);
1157 int_en &=
1158 ~(PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT);
1159 iowrite32(int_en, &hw->reg->INT_EN);
1160 /* Start polling for NAPI */
1161 __napi_schedule(&adapter->napi);
1162 }
1163 }
1164 pr_debug("return = 0x%08x INT_EN reg = 0x%08x\n",
1165 IRQ_HANDLED, ioread32(&hw->reg->INT_EN));
1166 return IRQ_HANDLED;
1167 }
1168
1169 /**
1170 * pch_gbe_alloc_rx_buffers - Replace used receive buffers; legacy & extended
1171 * @adapter: Board private structure
1172 * @rx_ring: Rx descriptor ring
1173 * @cleaned_count: Cleaned count
1174 */
1175 static void
1176 pch_gbe_alloc_rx_buffers(struct pch_gbe_adapter *adapter,
1177 struct pch_gbe_rx_ring *rx_ring, int cleaned_count)
1178 {
1179 struct net_device *netdev = adapter->netdev;
1180 struct pci_dev *pdev = adapter->pdev;
1181 struct pch_gbe_hw *hw = &adapter->hw;
1182 struct pch_gbe_rx_desc *rx_desc;
1183 struct pch_gbe_buffer *buffer_info;
1184 struct sk_buff *skb;
1185 unsigned int i;
1186 unsigned int bufsz;
1187
1188 bufsz = adapter->rx_buffer_len + PCH_GBE_DMA_ALIGN;
1189 i = rx_ring->next_to_use;
1190
1191 while ((cleaned_count--)) {
1192 buffer_info = &rx_ring->buffer_info[i];
1193 skb = buffer_info->skb;
1194 if (skb) {
1195 skb_trim(skb, 0);
1196 } else {
1197 skb = netdev_alloc_skb(netdev, bufsz);
1198 if (unlikely(!skb)) {
1199 /* Better luck next round */
1200 adapter->stats.rx_alloc_buff_failed++;
1201 break;
1202 }
1203 /* 64byte align */
1204 skb_reserve(skb, PCH_GBE_DMA_ALIGN);
1205
1206 buffer_info->skb = skb;
1207 buffer_info->length = adapter->rx_buffer_len;
1208 }
1209 buffer_info->dma = dma_map_single(&pdev->dev,
1210 skb->data,
1211 buffer_info->length,
1212 DMA_FROM_DEVICE);
1213 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) {
1214 dev_kfree_skb(skb);
1215 buffer_info->skb = NULL;
1216 buffer_info->dma = 0;
1217 adapter->stats.rx_alloc_buff_failed++;
1218 break; /* while !buffer_info->skb */
1219 }
1220 buffer_info->mapped = true;
1221 rx_desc = PCH_GBE_RX_DESC(*rx_ring, i);
1222 rx_desc->buffer_addr = (buffer_info->dma);
1223 rx_desc->gbec_status = DSC_INIT16;
1224
1225 pr_debug("i = %d buffer_info->dma = 0x08%llx buffer_info->length = 0x%x\n",
1226 i, (unsigned long long)buffer_info->dma,
1227 buffer_info->length);
1228
1229 if (unlikely(++i == rx_ring->count))
1230 i = 0;
1231 }
1232 if (likely(rx_ring->next_to_use != i)) {
1233 rx_ring->next_to_use = i;
1234 if (unlikely(i-- == 0))
1235 i = (rx_ring->count - 1);
1236 iowrite32(rx_ring->dma +
1237 (int)sizeof(struct pch_gbe_rx_desc) * i,
1238 &hw->reg->RX_DSC_SW_P);
1239 }
1240 return;
1241 }
1242
1243 /**
1244 * pch_gbe_alloc_tx_buffers - Allocate transmit buffers
1245 * @adapter: Board private structure
1246 * @tx_ring: Tx descriptor ring
1247 */
1248 static void pch_gbe_alloc_tx_buffers(struct pch_gbe_adapter *adapter,
1249 struct pch_gbe_tx_ring *tx_ring)
1250 {
1251 struct pch_gbe_buffer *buffer_info;
1252 struct sk_buff *skb;
1253 unsigned int i;
1254 unsigned int bufsz;
1255 struct pch_gbe_tx_desc *tx_desc;
1256
1257 bufsz =
1258 adapter->hw.mac.max_frame_size + PCH_GBE_DMA_ALIGN + NET_IP_ALIGN;
1259
1260 for (i = 0; i < tx_ring->count; i++) {
1261 buffer_info = &tx_ring->buffer_info[i];
1262 skb = netdev_alloc_skb(adapter->netdev, bufsz);
1263 skb_reserve(skb, PCH_GBE_DMA_ALIGN);
1264 buffer_info->skb = skb;
1265 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1266 tx_desc->gbec_status = (DSC_INIT16);
1267 }
1268 return;
1269 }
1270
1271 /**
1272 * pch_gbe_clean_tx - Reclaim resources after transmit completes
1273 * @adapter: Board private structure
1274 * @tx_ring: Tx descriptor ring
1275 * Returns
1276 * true: Cleaned the descriptor
1277 * false: Not cleaned the descriptor
1278 */
1279 static bool
1280 pch_gbe_clean_tx(struct pch_gbe_adapter *adapter,
1281 struct pch_gbe_tx_ring *tx_ring)
1282 {
1283 struct pch_gbe_tx_desc *tx_desc;
1284 struct pch_gbe_buffer *buffer_info;
1285 struct sk_buff *skb;
1286 unsigned int i;
1287 unsigned int cleaned_count = 0;
1288 bool cleaned = false;
1289
1290 pr_debug("next_to_clean : %d\n", tx_ring->next_to_clean);
1291
1292 i = tx_ring->next_to_clean;
1293 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1294 pr_debug("gbec_status:0x%04x dma_status:0x%04x\n",
1295 tx_desc->gbec_status, tx_desc->dma_status);
1296
1297 while ((tx_desc->gbec_status & DSC_INIT16) == 0x0000) {
1298 pr_debug("gbec_status:0x%04x\n", tx_desc->gbec_status);
1299 cleaned = true;
1300 buffer_info = &tx_ring->buffer_info[i];
1301 skb = buffer_info->skb;
1302
1303 if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_ABT)) {
1304 adapter->stats.tx_aborted_errors++;
1305 pr_err("Transfer Abort Error\n");
1306 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_CRSER)
1307 ) {
1308 adapter->stats.tx_carrier_errors++;
1309 pr_err("Transfer Carrier Sense Error\n");
1310 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_EXCOL)
1311 ) {
1312 adapter->stats.tx_aborted_errors++;
1313 pr_err("Transfer Collision Abort Error\n");
1314 } else if ((tx_desc->gbec_status &
1315 (PCH_GBE_TXD_GMAC_STAT_SNGCOL |
1316 PCH_GBE_TXD_GMAC_STAT_MLTCOL))) {
1317 adapter->stats.collisions++;
1318 adapter->stats.tx_packets++;
1319 adapter->stats.tx_bytes += skb->len;
1320 pr_debug("Transfer Collision\n");
1321 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_CMPLT)
1322 ) {
1323 adapter->stats.tx_packets++;
1324 adapter->stats.tx_bytes += skb->len;
1325 }
1326 if (buffer_info->mapped) {
1327 pr_debug("unmap buffer_info->dma : %d\n", i);
1328 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1329 buffer_info->length, DMA_TO_DEVICE);
1330 buffer_info->mapped = false;
1331 }
1332 if (buffer_info->skb) {
1333 pr_debug("trim buffer_info->skb : %d\n", i);
1334 skb_trim(buffer_info->skb, 0);
1335 }
1336 tx_desc->gbec_status = DSC_INIT16;
1337 if (unlikely(++i == tx_ring->count))
1338 i = 0;
1339 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1340
1341 /* weight of a sort for tx, to avoid endless transmit cleanup */
1342 if (cleaned_count++ == PCH_GBE_TX_WEIGHT)
1343 break;
1344 }
1345 pr_debug("called pch_gbe_unmap_and_free_tx_resource() %d count\n",
1346 cleaned_count);
1347 /* Recover from running out of Tx resources in xmit_frame */
1348 if (unlikely(cleaned && (netif_queue_stopped(adapter->netdev)))) {
1349 netif_wake_queue(adapter->netdev);
1350 adapter->stats.tx_restart_count++;
1351 pr_debug("Tx wake queue\n");
1352 }
1353 spin_lock(&adapter->tx_queue_lock);
1354 tx_ring->next_to_clean = i;
1355 spin_unlock(&adapter->tx_queue_lock);
1356 pr_debug("next_to_clean : %d\n", tx_ring->next_to_clean);
1357 return cleaned;
1358 }
1359
1360 /**
1361 * pch_gbe_clean_rx - Send received data up the network stack; legacy
1362 * @adapter: Board private structure
1363 * @rx_ring: Rx descriptor ring
1364 * @work_done: Completed count
1365 * @work_to_do: Request count
1366 * Returns
1367 * true: Cleaned the descriptor
1368 * false: Not cleaned the descriptor
1369 */
1370 static bool
1371 pch_gbe_clean_rx(struct pch_gbe_adapter *adapter,
1372 struct pch_gbe_rx_ring *rx_ring,
1373 int *work_done, int work_to_do)
1374 {
1375 struct net_device *netdev = adapter->netdev;
1376 struct pci_dev *pdev = adapter->pdev;
1377 struct pch_gbe_buffer *buffer_info;
1378 struct pch_gbe_rx_desc *rx_desc;
1379 u32 length;
1380 unsigned int i;
1381 unsigned int cleaned_count = 0;
1382 bool cleaned = false;
1383 struct sk_buff *skb, *new_skb;
1384 u8 dma_status;
1385 u16 gbec_status;
1386 u32 tcp_ip_status;
1387
1388 i = rx_ring->next_to_clean;
1389
1390 while (*work_done < work_to_do) {
1391 /* Check Rx descriptor status */
1392 rx_desc = PCH_GBE_RX_DESC(*rx_ring, i);
1393 if (rx_desc->gbec_status == DSC_INIT16)
1394 break;
1395 cleaned = true;
1396 cleaned_count++;
1397
1398 dma_status = rx_desc->dma_status;
1399 gbec_status = rx_desc->gbec_status;
1400 tcp_ip_status = rx_desc->tcp_ip_status;
1401 rx_desc->gbec_status = DSC_INIT16;
1402 buffer_info = &rx_ring->buffer_info[i];
1403 skb = buffer_info->skb;
1404
1405 /* unmap dma */
1406 dma_unmap_single(&pdev->dev, buffer_info->dma,
1407 buffer_info->length, DMA_FROM_DEVICE);
1408 buffer_info->mapped = false;
1409 /* Prefetch the packet */
1410 prefetch(skb->data);
1411
1412 pr_debug("RxDecNo = 0x%04x Status[DMA:0x%02x GBE:0x%04x "
1413 "TCP:0x%08x] BufInf = 0x%p\n",
1414 i, dma_status, gbec_status, tcp_ip_status,
1415 buffer_info);
1416 /* Error check */
1417 if (unlikely(gbec_status & PCH_GBE_RXD_GMAC_STAT_NOTOCTAL)) {
1418 adapter->stats.rx_frame_errors++;
1419 pr_err("Receive Not Octal Error\n");
1420 } else if (unlikely(gbec_status &
1421 PCH_GBE_RXD_GMAC_STAT_NBLERR)) {
1422 adapter->stats.rx_frame_errors++;
1423 pr_err("Receive Nibble Error\n");
1424 } else if (unlikely(gbec_status &
1425 PCH_GBE_RXD_GMAC_STAT_CRCERR)) {
1426 adapter->stats.rx_crc_errors++;
1427 pr_err("Receive CRC Error\n");
1428 } else {
1429 /* get receive length */
1430 /* length convert[-3] */
1431 length = (rx_desc->rx_words_eob) - 3;
1432
1433 /* Decide the data conversion method */
1434 if (!(netdev->features & NETIF_F_RXCSUM)) {
1435 /* [Header:14][payload] */
1436 if (NET_IP_ALIGN) {
1437 /* Because alignment differs,
1438 * the new_skb is newly allocated,
1439 * and data is copied to new_skb.*/
1440 new_skb = netdev_alloc_skb(netdev,
1441 length + NET_IP_ALIGN);
1442 if (!new_skb) {
1443 /* dorrop error */
1444 pr_err("New skb allocation "
1445 "Error\n");
1446 goto dorrop;
1447 }
1448 skb_reserve(new_skb, NET_IP_ALIGN);
1449 memcpy(new_skb->data, skb->data,
1450 length);
1451 skb = new_skb;
1452 } else {
1453 /* DMA buffer is used as SKB as it is.*/
1454 buffer_info->skb = NULL;
1455 }
1456 } else {
1457 /* [Header:14][padding:2][payload] */
1458 /* The length includes padding length */
1459 length = length - PCH_GBE_DMA_PADDING;
1460 if ((length < copybreak) ||
1461 (NET_IP_ALIGN != PCH_GBE_DMA_PADDING)) {
1462 /* Because alignment differs,
1463 * the new_skb is newly allocated,
1464 * and data is copied to new_skb.
1465 * Padding data is deleted
1466 * at the time of a copy.*/
1467 new_skb = netdev_alloc_skb(netdev,
1468 length + NET_IP_ALIGN);
1469 if (!new_skb) {
1470 /* dorrop error */
1471 pr_err("New skb allocation "
1472 "Error\n");
1473 goto dorrop;
1474 }
1475 skb_reserve(new_skb, NET_IP_ALIGN);
1476 memcpy(new_skb->data, skb->data,
1477 ETH_HLEN);
1478 memcpy(&new_skb->data[ETH_HLEN],
1479 &skb->data[ETH_HLEN +
1480 PCH_GBE_DMA_PADDING],
1481 length - ETH_HLEN);
1482 skb = new_skb;
1483 } else {
1484 /* Padding data is deleted
1485 * by moving header data.*/
1486 memmove(&skb->data[PCH_GBE_DMA_PADDING],
1487 &skb->data[0], ETH_HLEN);
1488 skb_reserve(skb, NET_IP_ALIGN);
1489 buffer_info->skb = NULL;
1490 }
1491 }
1492 /* The length includes FCS length */
1493 length = length - ETH_FCS_LEN;
1494 /* update status of driver */
1495 adapter->stats.rx_bytes += length;
1496 adapter->stats.rx_packets++;
1497 if ((gbec_status & PCH_GBE_RXD_GMAC_STAT_MARMLT))
1498 adapter->stats.multicast++;
1499 /* Write meta date of skb */
1500 skb_put(skb, length);
1501 skb->protocol = eth_type_trans(skb, netdev);
1502 if (tcp_ip_status & PCH_GBE_RXD_ACC_STAT_TCPIPOK)
1503 skb->ip_summed = CHECKSUM_NONE;
1504 else
1505 skb->ip_summed = CHECKSUM_UNNECESSARY;
1506
1507 napi_gro_receive(&adapter->napi, skb);
1508 (*work_done)++;
1509 pr_debug("Receive skb->ip_summed: %d length: %d\n",
1510 skb->ip_summed, length);
1511 }
1512 dorrop:
1513 /* return some buffers to hardware, one at a time is too slow */
1514 if (unlikely(cleaned_count >= PCH_GBE_RX_BUFFER_WRITE)) {
1515 pch_gbe_alloc_rx_buffers(adapter, rx_ring,
1516 cleaned_count);
1517 cleaned_count = 0;
1518 }
1519 if (++i == rx_ring->count)
1520 i = 0;
1521 }
1522 rx_ring->next_to_clean = i;
1523 if (cleaned_count)
1524 pch_gbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
1525 return cleaned;
1526 }
1527
1528 /**
1529 * pch_gbe_setup_tx_resources - Allocate Tx resources (Descriptors)
1530 * @adapter: Board private structure
1531 * @tx_ring: Tx descriptor ring (for a specific queue) to setup
1532 * Returns
1533 * 0: Successfully
1534 * Negative value: Failed
1535 */
1536 int pch_gbe_setup_tx_resources(struct pch_gbe_adapter *adapter,
1537 struct pch_gbe_tx_ring *tx_ring)
1538 {
1539 struct pci_dev *pdev = adapter->pdev;
1540 struct pch_gbe_tx_desc *tx_desc;
1541 int size;
1542 int desNo;
1543
1544 size = (int)sizeof(struct pch_gbe_buffer) * tx_ring->count;
1545 tx_ring->buffer_info = vzalloc(size);
1546 if (!tx_ring->buffer_info) {
1547 pr_err("Unable to allocate memory for the buffer information\n");
1548 return -ENOMEM;
1549 }
1550
1551 tx_ring->size = tx_ring->count * (int)sizeof(struct pch_gbe_tx_desc);
1552
1553 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
1554 &tx_ring->dma, GFP_KERNEL);
1555 if (!tx_ring->desc) {
1556 vfree(tx_ring->buffer_info);
1557 pr_err("Unable to allocate memory for the transmit descriptor ring\n");
1558 return -ENOMEM;
1559 }
1560 memset(tx_ring->desc, 0, tx_ring->size);
1561
1562 tx_ring->next_to_use = 0;
1563 tx_ring->next_to_clean = 0;
1564 spin_lock_init(&tx_ring->tx_lock);
1565
1566 for (desNo = 0; desNo < tx_ring->count; desNo++) {
1567 tx_desc = PCH_GBE_TX_DESC(*tx_ring, desNo);
1568 tx_desc->gbec_status = DSC_INIT16;
1569 }
1570 pr_debug("tx_ring->desc = 0x%p tx_ring->dma = 0x%08llx\n"
1571 "next_to_clean = 0x%08x next_to_use = 0x%08x\n",
1572 tx_ring->desc, (unsigned long long)tx_ring->dma,
1573 tx_ring->next_to_clean, tx_ring->next_to_use);
1574 return 0;
1575 }
1576
1577 /**
1578 * pch_gbe_setup_rx_resources - Allocate Rx resources (Descriptors)
1579 * @adapter: Board private structure
1580 * @rx_ring: Rx descriptor ring (for a specific queue) to setup
1581 * Returns
1582 * 0: Successfully
1583 * Negative value: Failed
1584 */
1585 int pch_gbe_setup_rx_resources(struct pch_gbe_adapter *adapter,
1586 struct pch_gbe_rx_ring *rx_ring)
1587 {
1588 struct pci_dev *pdev = adapter->pdev;
1589 struct pch_gbe_rx_desc *rx_desc;
1590 int size;
1591 int desNo;
1592
1593 size = (int)sizeof(struct pch_gbe_buffer) * rx_ring->count;
1594 rx_ring->buffer_info = vzalloc(size);
1595 if (!rx_ring->buffer_info) {
1596 pr_err("Unable to allocate memory for the receive descriptor ring\n");
1597 return -ENOMEM;
1598 }
1599 rx_ring->size = rx_ring->count * (int)sizeof(struct pch_gbe_rx_desc);
1600 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
1601 &rx_ring->dma, GFP_KERNEL);
1602
1603 if (!rx_ring->desc) {
1604 pr_err("Unable to allocate memory for the receive descriptor ring\n");
1605 vfree(rx_ring->buffer_info);
1606 return -ENOMEM;
1607 }
1608 memset(rx_ring->desc, 0, rx_ring->size);
1609 rx_ring->next_to_clean = 0;
1610 rx_ring->next_to_use = 0;
1611 for (desNo = 0; desNo < rx_ring->count; desNo++) {
1612 rx_desc = PCH_GBE_RX_DESC(*rx_ring, desNo);
1613 rx_desc->gbec_status = DSC_INIT16;
1614 }
1615 pr_debug("rx_ring->desc = 0x%p rx_ring->dma = 0x%08llx "
1616 "next_to_clean = 0x%08x next_to_use = 0x%08x\n",
1617 rx_ring->desc, (unsigned long long)rx_ring->dma,
1618 rx_ring->next_to_clean, rx_ring->next_to_use);
1619 return 0;
1620 }
1621
1622 /**
1623 * pch_gbe_free_tx_resources - Free Tx Resources
1624 * @adapter: Board private structure
1625 * @tx_ring: Tx descriptor ring for a specific queue
1626 */
1627 void pch_gbe_free_tx_resources(struct pch_gbe_adapter *adapter,
1628 struct pch_gbe_tx_ring *tx_ring)
1629 {
1630 struct pci_dev *pdev = adapter->pdev;
1631
1632 pch_gbe_clean_tx_ring(adapter, tx_ring);
1633 vfree(tx_ring->buffer_info);
1634 tx_ring->buffer_info = NULL;
1635 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1636 tx_ring->desc = NULL;
1637 }
1638
1639 /**
1640 * pch_gbe_free_rx_resources - Free Rx Resources
1641 * @adapter: Board private structure
1642 * @rx_ring: Ring to clean the resources from
1643 */
1644 void pch_gbe_free_rx_resources(struct pch_gbe_adapter *adapter,
1645 struct pch_gbe_rx_ring *rx_ring)
1646 {
1647 struct pci_dev *pdev = adapter->pdev;
1648
1649 pch_gbe_clean_rx_ring(adapter, rx_ring);
1650 vfree(rx_ring->buffer_info);
1651 rx_ring->buffer_info = NULL;
1652 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1653 rx_ring->desc = NULL;
1654 }
1655
1656 /**
1657 * pch_gbe_request_irq - Allocate an interrupt line
1658 * @adapter: Board private structure
1659 * Returns
1660 * 0: Successfully
1661 * Negative value: Failed
1662 */
1663 static int pch_gbe_request_irq(struct pch_gbe_adapter *adapter)
1664 {
1665 struct net_device *netdev = adapter->netdev;
1666 int err;
1667 int flags;
1668
1669 flags = IRQF_SHARED;
1670 adapter->have_msi = false;
1671 err = pci_enable_msi(adapter->pdev);
1672 pr_debug("call pci_enable_msi\n");
1673 if (err) {
1674 pr_debug("call pci_enable_msi - Error: %d\n", err);
1675 } else {
1676 flags = 0;
1677 adapter->have_msi = true;
1678 }
1679 err = request_irq(adapter->pdev->irq, &pch_gbe_intr,
1680 flags, netdev->name, netdev);
1681 if (err)
1682 pr_err("Unable to allocate interrupt Error: %d\n", err);
1683 pr_debug("adapter->have_msi : %d flags : 0x%04x return : 0x%04x\n",
1684 adapter->have_msi, flags, err);
1685 return err;
1686 }
1687
1688
1689 static void pch_gbe_set_multi(struct net_device *netdev);
1690 /**
1691 * pch_gbe_up - Up GbE network device
1692 * @adapter: Board private structure
1693 * Returns
1694 * 0: Successfully
1695 * Negative value: Failed
1696 */
1697 int pch_gbe_up(struct pch_gbe_adapter *adapter)
1698 {
1699 struct net_device *netdev = adapter->netdev;
1700 struct pch_gbe_tx_ring *tx_ring = adapter->tx_ring;
1701 struct pch_gbe_rx_ring *rx_ring = adapter->rx_ring;
1702 int err;
1703
1704 /* hardware has been reset, we need to reload some things */
1705 pch_gbe_set_multi(netdev);
1706
1707 pch_gbe_setup_tctl(adapter);
1708 pch_gbe_configure_tx(adapter);
1709 pch_gbe_setup_rctl(adapter);
1710 pch_gbe_configure_rx(adapter);
1711
1712 err = pch_gbe_request_irq(adapter);
1713 if (err) {
1714 pr_err("Error: can't bring device up\n");
1715 return err;
1716 }
1717 pch_gbe_alloc_tx_buffers(adapter, tx_ring);
1718 pch_gbe_alloc_rx_buffers(adapter, rx_ring, rx_ring->count);
1719 adapter->tx_queue_len = netdev->tx_queue_len;
1720
1721 mod_timer(&adapter->watchdog_timer, jiffies);
1722
1723 napi_enable(&adapter->napi);
1724 pch_gbe_irq_enable(adapter);
1725 netif_start_queue(adapter->netdev);
1726
1727 return 0;
1728 }
1729
1730 /**
1731 * pch_gbe_down - Down GbE network device
1732 * @adapter: Board private structure
1733 */
1734 void pch_gbe_down(struct pch_gbe_adapter *adapter)
1735 {
1736 struct net_device *netdev = adapter->netdev;
1737
1738 /* signal that we're down so the interrupt handler does not
1739 * reschedule our watchdog timer */
1740 napi_disable(&adapter->napi);
1741 atomic_set(&adapter->irq_sem, 0);
1742
1743 pch_gbe_irq_disable(adapter);
1744 pch_gbe_free_irq(adapter);
1745
1746 del_timer_sync(&adapter->watchdog_timer);
1747
1748 netdev->tx_queue_len = adapter->tx_queue_len;
1749 netif_carrier_off(netdev);
1750 netif_stop_queue(netdev);
1751
1752 pch_gbe_reset(adapter);
1753 pch_gbe_clean_tx_ring(adapter, adapter->tx_ring);
1754 pch_gbe_clean_rx_ring(adapter, adapter->rx_ring);
1755 }
1756
1757 /**
1758 * pch_gbe_sw_init - Initialize general software structures (struct pch_gbe_adapter)
1759 * @adapter: Board private structure to initialize
1760 * Returns
1761 * 0: Successfully
1762 * Negative value: Failed
1763 */
1764 static int pch_gbe_sw_init(struct pch_gbe_adapter *adapter)
1765 {
1766 struct pch_gbe_hw *hw = &adapter->hw;
1767 struct net_device *netdev = adapter->netdev;
1768
1769 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_2048;
1770 hw->mac.max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1771 hw->mac.min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1772
1773 /* Initialize the hardware-specific values */
1774 if (pch_gbe_hal_setup_init_funcs(hw)) {
1775 pr_err("Hardware Initialization Failure\n");
1776 return -EIO;
1777 }
1778 if (pch_gbe_alloc_queues(adapter)) {
1779 pr_err("Unable to allocate memory for queues\n");
1780 return -ENOMEM;
1781 }
1782 spin_lock_init(&adapter->hw.miim_lock);
1783 spin_lock_init(&adapter->tx_queue_lock);
1784 spin_lock_init(&adapter->stats_lock);
1785 spin_lock_init(&adapter->ethtool_lock);
1786 atomic_set(&adapter->irq_sem, 0);
1787 pch_gbe_irq_disable(adapter);
1788
1789 pch_gbe_init_stats(adapter);
1790
1791 pr_debug("rx_buffer_len : %d mac.min_frame_size : %d mac.max_frame_size : %d\n",
1792 (u32) adapter->rx_buffer_len,
1793 hw->mac.min_frame_size, hw->mac.max_frame_size);
1794 return 0;
1795 }
1796
1797 /**
1798 * pch_gbe_open - Called when a network interface is made active
1799 * @netdev: Network interface device structure
1800 * Returns
1801 * 0: Successfully
1802 * Negative value: Failed
1803 */
1804 static int pch_gbe_open(struct net_device *netdev)
1805 {
1806 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1807 struct pch_gbe_hw *hw = &adapter->hw;
1808 int err;
1809
1810 /* allocate transmit descriptors */
1811 err = pch_gbe_setup_tx_resources(adapter, adapter->tx_ring);
1812 if (err)
1813 goto err_setup_tx;
1814 /* allocate receive descriptors */
1815 err = pch_gbe_setup_rx_resources(adapter, adapter->rx_ring);
1816 if (err)
1817 goto err_setup_rx;
1818 pch_gbe_hal_power_up_phy(hw);
1819 err = pch_gbe_up(adapter);
1820 if (err)
1821 goto err_up;
1822 pr_debug("Success End\n");
1823 return 0;
1824
1825 err_up:
1826 if (!adapter->wake_up_evt)
1827 pch_gbe_hal_power_down_phy(hw);
1828 pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
1829 err_setup_rx:
1830 pch_gbe_free_tx_resources(adapter, adapter->tx_ring);
1831 err_setup_tx:
1832 pch_gbe_reset(adapter);
1833 pr_err("Error End\n");
1834 return err;
1835 }
1836
1837 /**
1838 * pch_gbe_stop - Disables a network interface
1839 * @netdev: Network interface device structure
1840 * Returns
1841 * 0: Successfully
1842 */
1843 static int pch_gbe_stop(struct net_device *netdev)
1844 {
1845 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1846 struct pch_gbe_hw *hw = &adapter->hw;
1847
1848 pch_gbe_down(adapter);
1849 if (!adapter->wake_up_evt)
1850 pch_gbe_hal_power_down_phy(hw);
1851 pch_gbe_free_tx_resources(adapter, adapter->tx_ring);
1852 pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
1853 return 0;
1854 }
1855
1856 /**
1857 * pch_gbe_xmit_frame - Packet transmitting start
1858 * @skb: Socket buffer structure
1859 * @netdev: Network interface device structure
1860 * Returns
1861 * - NETDEV_TX_OK: Normal end
1862 * - NETDEV_TX_BUSY: Error end
1863 */
1864 static int pch_gbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1865 {
1866 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1867 struct pch_gbe_tx_ring *tx_ring = adapter->tx_ring;
1868 unsigned long flags;
1869
1870 if (unlikely(skb->len > (adapter->hw.mac.max_frame_size - 4))) {
1871 pr_err("Transfer length Error: skb len: %d > max: %d\n",
1872 skb->len, adapter->hw.mac.max_frame_size);
1873 dev_kfree_skb_any(skb);
1874 adapter->stats.tx_length_errors++;
1875 return NETDEV_TX_OK;
1876 }
1877 if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags)) {
1878 /* Collision - tell upper layer to requeue */
1879 return NETDEV_TX_LOCKED;
1880 }
1881 if (unlikely(!PCH_GBE_DESC_UNUSED(tx_ring))) {
1882 netif_stop_queue(netdev);
1883 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1884 pr_debug("Return : BUSY next_to use : 0x%08x next_to clean : 0x%08x\n",
1885 tx_ring->next_to_use, tx_ring->next_to_clean);
1886 return NETDEV_TX_BUSY;
1887 }
1888 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1889
1890 /* CRC,ITAG no support */
1891 pch_gbe_tx_queue(adapter, tx_ring, skb);
1892 return NETDEV_TX_OK;
1893 }
1894
1895 /**
1896 * pch_gbe_get_stats - Get System Network Statistics
1897 * @netdev: Network interface device structure
1898 * Returns: The current stats
1899 */
1900 static struct net_device_stats *pch_gbe_get_stats(struct net_device *netdev)
1901 {
1902 /* only return the current stats */
1903 return &netdev->stats;
1904 }
1905
1906 /**
1907 * pch_gbe_set_multi - Multicast and Promiscuous mode set
1908 * @netdev: Network interface device structure
1909 */
1910 static void pch_gbe_set_multi(struct net_device *netdev)
1911 {
1912 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1913 struct pch_gbe_hw *hw = &adapter->hw;
1914 struct netdev_hw_addr *ha;
1915 u8 *mta_list;
1916 u32 rctl;
1917 int i;
1918 int mc_count;
1919
1920 pr_debug("netdev->flags : 0x%08x\n", netdev->flags);
1921
1922 /* Check for Promiscuous and All Multicast modes */
1923 rctl = ioread32(&hw->reg->RX_MODE);
1924 mc_count = netdev_mc_count(netdev);
1925 if ((netdev->flags & IFF_PROMISC)) {
1926 rctl &= ~PCH_GBE_ADD_FIL_EN;
1927 rctl &= ~PCH_GBE_MLT_FIL_EN;
1928 } else if ((netdev->flags & IFF_ALLMULTI)) {
1929 /* all the multicasting receive permissions */
1930 rctl |= PCH_GBE_ADD_FIL_EN;
1931 rctl &= ~PCH_GBE_MLT_FIL_EN;
1932 } else {
1933 if (mc_count >= PCH_GBE_MAR_ENTRIES) {
1934 /* all the multicasting receive permissions */
1935 rctl |= PCH_GBE_ADD_FIL_EN;
1936 rctl &= ~PCH_GBE_MLT_FIL_EN;
1937 } else {
1938 rctl |= (PCH_GBE_ADD_FIL_EN | PCH_GBE_MLT_FIL_EN);
1939 }
1940 }
1941 iowrite32(rctl, &hw->reg->RX_MODE);
1942
1943 if (mc_count >= PCH_GBE_MAR_ENTRIES)
1944 return;
1945 mta_list = kmalloc(mc_count * ETH_ALEN, GFP_ATOMIC);
1946 if (!mta_list)
1947 return;
1948
1949 /* The shared function expects a packed array of only addresses. */
1950 i = 0;
1951 netdev_for_each_mc_addr(ha, netdev) {
1952 if (i == mc_count)
1953 break;
1954 memcpy(mta_list + (i++ * ETH_ALEN), &ha->addr, ETH_ALEN);
1955 }
1956 pch_gbe_mac_mc_addr_list_update(hw, mta_list, i, 1,
1957 PCH_GBE_MAR_ENTRIES);
1958 kfree(mta_list);
1959
1960 pr_debug("RX_MODE reg(check bit31,30 ADD,MLT) : 0x%08x netdev->mc_count : 0x%08x\n",
1961 ioread32(&hw->reg->RX_MODE), mc_count);
1962 }
1963
1964 /**
1965 * pch_gbe_set_mac - Change the Ethernet Address of the NIC
1966 * @netdev: Network interface device structure
1967 * @addr: Pointer to an address structure
1968 * Returns
1969 * 0: Successfully
1970 * -EADDRNOTAVAIL: Failed
1971 */
1972 static int pch_gbe_set_mac(struct net_device *netdev, void *addr)
1973 {
1974 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1975 struct sockaddr *skaddr = addr;
1976 int ret_val;
1977
1978 if (!is_valid_ether_addr(skaddr->sa_data)) {
1979 ret_val = -EADDRNOTAVAIL;
1980 } else {
1981 memcpy(netdev->dev_addr, skaddr->sa_data, netdev->addr_len);
1982 memcpy(adapter->hw.mac.addr, skaddr->sa_data, netdev->addr_len);
1983 pch_gbe_mac_mar_set(&adapter->hw, adapter->hw.mac.addr, 0);
1984 ret_val = 0;
1985 }
1986 pr_debug("ret_val : 0x%08x\n", ret_val);
1987 pr_debug("dev_addr : %pM\n", netdev->dev_addr);
1988 pr_debug("mac_addr : %pM\n", adapter->hw.mac.addr);
1989 pr_debug("MAC_ADR1AB reg : 0x%08x 0x%08x\n",
1990 ioread32(&adapter->hw.reg->mac_adr[0].high),
1991 ioread32(&adapter->hw.reg->mac_adr[0].low));
1992 return ret_val;
1993 }
1994
1995 /**
1996 * pch_gbe_change_mtu - Change the Maximum Transfer Unit
1997 * @netdev: Network interface device structure
1998 * @new_mtu: New value for maximum frame size
1999 * Returns
2000 * 0: Successfully
2001 * -EINVAL: Failed
2002 */
2003 static int pch_gbe_change_mtu(struct net_device *netdev, int new_mtu)
2004 {
2005 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2006 int max_frame;
2007
2008 max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2009 if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
2010 (max_frame > PCH_GBE_MAX_JUMBO_FRAME_SIZE)) {
2011 pr_err("Invalid MTU setting\n");
2012 return -EINVAL;
2013 }
2014 if (max_frame <= PCH_GBE_FRAME_SIZE_2048)
2015 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_2048;
2016 else if (max_frame <= PCH_GBE_FRAME_SIZE_4096)
2017 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_4096;
2018 else if (max_frame <= PCH_GBE_FRAME_SIZE_8192)
2019 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_8192;
2020 else
2021 adapter->rx_buffer_len = PCH_GBE_MAX_JUMBO_FRAME_SIZE;
2022 netdev->mtu = new_mtu;
2023 adapter->hw.mac.max_frame_size = max_frame;
2024
2025 if (netif_running(netdev))
2026 pch_gbe_reinit_locked(adapter);
2027 else
2028 pch_gbe_reset(adapter);
2029
2030 pr_debug("max_frame : %d rx_buffer_len : %d mtu : %d max_frame_size : %d\n",
2031 max_frame, (u32) adapter->rx_buffer_len, netdev->mtu,
2032 adapter->hw.mac.max_frame_size);
2033 return 0;
2034 }
2035
2036 /**
2037 * pch_gbe_set_features - Reset device after features changed
2038 * @netdev: Network interface device structure
2039 * @features: New features
2040 * Returns
2041 * 0: HW state updated successfully
2042 */
2043 static int pch_gbe_set_features(struct net_device *netdev, u32 features)
2044 {
2045 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2046 u32 changed = features ^ netdev->features;
2047
2048 if (!(changed & NETIF_F_RXCSUM))
2049 return 0;
2050
2051 if (netif_running(netdev))
2052 pch_gbe_reinit_locked(adapter);
2053 else
2054 pch_gbe_reset(adapter);
2055
2056 return 0;
2057 }
2058
2059 /**
2060 * pch_gbe_ioctl - Controls register through a MII interface
2061 * @netdev: Network interface device structure
2062 * @ifr: Pointer to ifr structure
2063 * @cmd: Control command
2064 * Returns
2065 * 0: Successfully
2066 * Negative value: Failed
2067 */
2068 static int pch_gbe_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2069 {
2070 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2071
2072 pr_debug("cmd : 0x%04x\n", cmd);
2073
2074 return generic_mii_ioctl(&adapter->mii, if_mii(ifr), cmd, NULL);
2075 }
2076
2077 /**
2078 * pch_gbe_tx_timeout - Respond to a Tx Hang
2079 * @netdev: Network interface device structure
2080 */
2081 static void pch_gbe_tx_timeout(struct net_device *netdev)
2082 {
2083 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2084
2085 /* Do the reset outside of interrupt context */
2086 adapter->stats.tx_timeout_count++;
2087 schedule_work(&adapter->reset_task);
2088 }
2089
2090 /**
2091 * pch_gbe_napi_poll - NAPI receive and transfer polling callback
2092 * @napi: Pointer of polling device struct
2093 * @budget: The maximum number of a packet
2094 * Returns
2095 * false: Exit the polling mode
2096 * true: Continue the polling mode
2097 */
2098 static int pch_gbe_napi_poll(struct napi_struct *napi, int budget)
2099 {
2100 struct pch_gbe_adapter *adapter =
2101 container_of(napi, struct pch_gbe_adapter, napi);
2102 struct net_device *netdev = adapter->netdev;
2103 int work_done = 0;
2104 bool poll_end_flag = false;
2105 bool cleaned = false;
2106
2107 pr_debug("budget : %d\n", budget);
2108
2109 /* Keep link state information with original netdev */
2110 if (!netif_carrier_ok(netdev)) {
2111 poll_end_flag = true;
2112 } else {
2113 cleaned = pch_gbe_clean_tx(adapter, adapter->tx_ring);
2114 pch_gbe_clean_rx(adapter, adapter->rx_ring, &work_done, budget);
2115
2116 if (cleaned)
2117 work_done = budget;
2118 /* If no Tx and not enough Rx work done,
2119 * exit the polling mode
2120 */
2121 if ((work_done < budget) || !netif_running(netdev))
2122 poll_end_flag = true;
2123 }
2124
2125 if (poll_end_flag) {
2126 napi_complete(napi);
2127 pch_gbe_irq_enable(adapter);
2128 }
2129
2130 pr_debug("poll_end_flag : %d work_done : %d budget : %d\n",
2131 poll_end_flag, work_done, budget);
2132
2133 return work_done;
2134 }
2135
2136 #ifdef CONFIG_NET_POLL_CONTROLLER
2137 /**
2138 * pch_gbe_netpoll - Used by things like netconsole to send skbs
2139 * @netdev: Network interface device structure
2140 */
2141 static void pch_gbe_netpoll(struct net_device *netdev)
2142 {
2143 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2144
2145 disable_irq(adapter->pdev->irq);
2146 pch_gbe_intr(adapter->pdev->irq, netdev);
2147 enable_irq(adapter->pdev->irq);
2148 }
2149 #endif
2150
2151 static const struct net_device_ops pch_gbe_netdev_ops = {
2152 .ndo_open = pch_gbe_open,
2153 .ndo_stop = pch_gbe_stop,
2154 .ndo_start_xmit = pch_gbe_xmit_frame,
2155 .ndo_get_stats = pch_gbe_get_stats,
2156 .ndo_set_mac_address = pch_gbe_set_mac,
2157 .ndo_tx_timeout = pch_gbe_tx_timeout,
2158 .ndo_change_mtu = pch_gbe_change_mtu,
2159 .ndo_set_features = pch_gbe_set_features,
2160 .ndo_do_ioctl = pch_gbe_ioctl,
2161 .ndo_set_rx_mode = pch_gbe_set_multi,
2162 #ifdef CONFIG_NET_POLL_CONTROLLER
2163 .ndo_poll_controller = pch_gbe_netpoll,
2164 #endif
2165 };
2166
2167 static pci_ers_result_t pch_gbe_io_error_detected(struct pci_dev *pdev,
2168 pci_channel_state_t state)
2169 {
2170 struct net_device *netdev = pci_get_drvdata(pdev);
2171 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2172
2173 netif_device_detach(netdev);
2174 if (netif_running(netdev))
2175 pch_gbe_down(adapter);
2176 pci_disable_device(pdev);
2177 /* Request a slot slot reset. */
2178 return PCI_ERS_RESULT_NEED_RESET;
2179 }
2180
2181 static pci_ers_result_t pch_gbe_io_slot_reset(struct pci_dev *pdev)
2182 {
2183 struct net_device *netdev = pci_get_drvdata(pdev);
2184 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2185 struct pch_gbe_hw *hw = &adapter->hw;
2186
2187 if (pci_enable_device(pdev)) {
2188 pr_err("Cannot re-enable PCI device after reset\n");
2189 return PCI_ERS_RESULT_DISCONNECT;
2190 }
2191 pci_set_master(pdev);
2192 pci_enable_wake(pdev, PCI_D0, 0);
2193 pch_gbe_hal_power_up_phy(hw);
2194 pch_gbe_reset(adapter);
2195 /* Clear wake up status */
2196 pch_gbe_mac_set_wol_event(hw, 0);
2197
2198 return PCI_ERS_RESULT_RECOVERED;
2199 }
2200
2201 static void pch_gbe_io_resume(struct pci_dev *pdev)
2202 {
2203 struct net_device *netdev = pci_get_drvdata(pdev);
2204 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2205
2206 if (netif_running(netdev)) {
2207 if (pch_gbe_up(adapter)) {
2208 pr_debug("can't bring device back up after reset\n");
2209 return;
2210 }
2211 }
2212 netif_device_attach(netdev);
2213 }
2214
2215 static int __pch_gbe_suspend(struct pci_dev *pdev)
2216 {
2217 struct net_device *netdev = pci_get_drvdata(pdev);
2218 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2219 struct pch_gbe_hw *hw = &adapter->hw;
2220 u32 wufc = adapter->wake_up_evt;
2221 int retval = 0;
2222
2223 netif_device_detach(netdev);
2224 if (netif_running(netdev))
2225 pch_gbe_down(adapter);
2226 if (wufc) {
2227 pch_gbe_set_multi(netdev);
2228 pch_gbe_setup_rctl(adapter);
2229 pch_gbe_configure_rx(adapter);
2230 pch_gbe_set_rgmii_ctrl(adapter, hw->mac.link_speed,
2231 hw->mac.link_duplex);
2232 pch_gbe_set_mode(adapter, hw->mac.link_speed,
2233 hw->mac.link_duplex);
2234 pch_gbe_mac_set_wol_event(hw, wufc);
2235 pci_disable_device(pdev);
2236 } else {
2237 pch_gbe_hal_power_down_phy(hw);
2238 pch_gbe_mac_set_wol_event(hw, wufc);
2239 pci_disable_device(pdev);
2240 }
2241 return retval;
2242 }
2243
2244 #ifdef CONFIG_PM
2245 static int pch_gbe_suspend(struct device *device)
2246 {
2247 struct pci_dev *pdev = to_pci_dev(device);
2248
2249 return __pch_gbe_suspend(pdev);
2250 }
2251
2252 static int pch_gbe_resume(struct device *device)
2253 {
2254 struct pci_dev *pdev = to_pci_dev(device);
2255 struct net_device *netdev = pci_get_drvdata(pdev);
2256 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2257 struct pch_gbe_hw *hw = &adapter->hw;
2258 u32 err;
2259
2260 err = pci_enable_device(pdev);
2261 if (err) {
2262 pr_err("Cannot enable PCI device from suspend\n");
2263 return err;
2264 }
2265 pci_set_master(pdev);
2266 pch_gbe_hal_power_up_phy(hw);
2267 pch_gbe_reset(adapter);
2268 /* Clear wake on lan control and status */
2269 pch_gbe_mac_set_wol_event(hw, 0);
2270
2271 if (netif_running(netdev))
2272 pch_gbe_up(adapter);
2273 netif_device_attach(netdev);
2274
2275 return 0;
2276 }
2277 #endif /* CONFIG_PM */
2278
2279 static void pch_gbe_shutdown(struct pci_dev *pdev)
2280 {
2281 __pch_gbe_suspend(pdev);
2282 if (system_state == SYSTEM_POWER_OFF) {
2283 pci_wake_from_d3(pdev, true);
2284 pci_set_power_state(pdev, PCI_D3hot);
2285 }
2286 }
2287
2288 static void pch_gbe_remove(struct pci_dev *pdev)
2289 {
2290 struct net_device *netdev = pci_get_drvdata(pdev);
2291 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2292
2293 cancel_work_sync(&adapter->reset_task);
2294 unregister_netdev(netdev);
2295
2296 pch_gbe_hal_phy_hw_reset(&adapter->hw);
2297
2298 kfree(adapter->tx_ring);
2299 kfree(adapter->rx_ring);
2300
2301 iounmap(adapter->hw.reg);
2302 pci_release_regions(pdev);
2303 free_netdev(netdev);
2304 pci_disable_device(pdev);
2305 }
2306
2307 static int pch_gbe_probe(struct pci_dev *pdev,
2308 const struct pci_device_id *pci_id)
2309 {
2310 struct net_device *netdev;
2311 struct pch_gbe_adapter *adapter;
2312 int ret;
2313
2314 ret = pci_enable_device(pdev);
2315 if (ret)
2316 return ret;
2317
2318 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
2319 || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
2320 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2321 if (ret) {
2322 ret = pci_set_consistent_dma_mask(pdev,
2323 DMA_BIT_MASK(32));
2324 if (ret) {
2325 dev_err(&pdev->dev, "ERR: No usable DMA "
2326 "configuration, aborting\n");
2327 goto err_disable_device;
2328 }
2329 }
2330 }
2331
2332 ret = pci_request_regions(pdev, KBUILD_MODNAME);
2333 if (ret) {
2334 dev_err(&pdev->dev,
2335 "ERR: Can't reserve PCI I/O and memory resources\n");
2336 goto err_disable_device;
2337 }
2338 pci_set_master(pdev);
2339
2340 netdev = alloc_etherdev((int)sizeof(struct pch_gbe_adapter));
2341 if (!netdev) {
2342 ret = -ENOMEM;
2343 dev_err(&pdev->dev,
2344 "ERR: Can't allocate and set up an Ethernet device\n");
2345 goto err_release_pci;
2346 }
2347 SET_NETDEV_DEV(netdev, &pdev->dev);
2348
2349 pci_set_drvdata(pdev, netdev);
2350 adapter = netdev_priv(netdev);
2351 adapter->netdev = netdev;
2352 adapter->pdev = pdev;
2353 adapter->hw.back = adapter;
2354 adapter->hw.reg = pci_iomap(pdev, PCH_GBE_PCI_BAR, 0);
2355 if (!adapter->hw.reg) {
2356 ret = -EIO;
2357 dev_err(&pdev->dev, "Can't ioremap\n");
2358 goto err_free_netdev;
2359 }
2360
2361 netdev->netdev_ops = &pch_gbe_netdev_ops;
2362 netdev->watchdog_timeo = PCH_GBE_WATCHDOG_PERIOD;
2363 netif_napi_add(netdev, &adapter->napi,
2364 pch_gbe_napi_poll, PCH_GBE_RX_WEIGHT);
2365 netdev->hw_features = NETIF_F_RXCSUM |
2366 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2367 netdev->features = netdev->hw_features;
2368 pch_gbe_set_ethtool_ops(netdev);
2369
2370 pch_gbe_mac_load_mac_addr(&adapter->hw);
2371 pch_gbe_mac_reset_hw(&adapter->hw);
2372
2373 /* setup the private structure */
2374 ret = pch_gbe_sw_init(adapter);
2375 if (ret)
2376 goto err_iounmap;
2377
2378 /* Initialize PHY */
2379 ret = pch_gbe_init_phy(adapter);
2380 if (ret) {
2381 dev_err(&pdev->dev, "PHY initialize error\n");
2382 goto err_free_adapter;
2383 }
2384 pch_gbe_hal_get_bus_info(&adapter->hw);
2385
2386 /* Read the MAC address. and store to the private data */
2387 ret = pch_gbe_hal_read_mac_addr(&adapter->hw);
2388 if (ret) {
2389 dev_err(&pdev->dev, "MAC address Read Error\n");
2390 goto err_free_adapter;
2391 }
2392
2393 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2394 if (!is_valid_ether_addr(netdev->dev_addr)) {
2395 dev_err(&pdev->dev, "Invalid MAC Address\n");
2396 ret = -EIO;
2397 goto err_free_adapter;
2398 }
2399 setup_timer(&adapter->watchdog_timer, pch_gbe_watchdog,
2400 (unsigned long)adapter);
2401
2402 INIT_WORK(&adapter->reset_task, pch_gbe_reset_task);
2403
2404 pch_gbe_check_options(adapter);
2405
2406 /* initialize the wol settings based on the eeprom settings */
2407 adapter->wake_up_evt = PCH_GBE_WL_INIT_SETTING;
2408 dev_info(&pdev->dev, "MAC address : %pM\n", netdev->dev_addr);
2409
2410 /* reset the hardware with the new settings */
2411 pch_gbe_reset(adapter);
2412
2413 ret = register_netdev(netdev);
2414 if (ret)
2415 goto err_free_adapter;
2416 /* tell the stack to leave us alone until pch_gbe_open() is called */
2417 netif_carrier_off(netdev);
2418 netif_stop_queue(netdev);
2419
2420 dev_dbg(&pdev->dev, "OKIsemi(R) PCH Network Connection\n");
2421
2422 device_set_wakeup_enable(&pdev->dev, 1);
2423 return 0;
2424
2425 err_free_adapter:
2426 pch_gbe_hal_phy_hw_reset(&adapter->hw);
2427 kfree(adapter->tx_ring);
2428 kfree(adapter->rx_ring);
2429 err_iounmap:
2430 iounmap(adapter->hw.reg);
2431 err_free_netdev:
2432 free_netdev(netdev);
2433 err_release_pci:
2434 pci_release_regions(pdev);
2435 err_disable_device:
2436 pci_disable_device(pdev);
2437 return ret;
2438 }
2439
2440 static DEFINE_PCI_DEVICE_TABLE(pch_gbe_pcidev_id) = {
2441 {.vendor = PCI_VENDOR_ID_INTEL,
2442 .device = PCI_DEVICE_ID_INTEL_IOH1_GBE,
2443 .subvendor = PCI_ANY_ID,
2444 .subdevice = PCI_ANY_ID,
2445 .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2446 .class_mask = (0xFFFF00)
2447 },
2448 {.vendor = PCI_VENDOR_ID_ROHM,
2449 .device = PCI_DEVICE_ID_ROHM_ML7223_GBE,
2450 .subvendor = PCI_ANY_ID,
2451 .subdevice = PCI_ANY_ID,
2452 .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2453 .class_mask = (0xFFFF00)
2454 },
2455 /* required last entry */
2456 {0}
2457 };
2458
2459 #ifdef CONFIG_PM
2460 static const struct dev_pm_ops pch_gbe_pm_ops = {
2461 .suspend = pch_gbe_suspend,
2462 .resume = pch_gbe_resume,
2463 .freeze = pch_gbe_suspend,
2464 .thaw = pch_gbe_resume,
2465 .poweroff = pch_gbe_suspend,
2466 .restore = pch_gbe_resume,
2467 };
2468 #endif
2469
2470 static struct pci_error_handlers pch_gbe_err_handler = {
2471 .error_detected = pch_gbe_io_error_detected,
2472 .slot_reset = pch_gbe_io_slot_reset,
2473 .resume = pch_gbe_io_resume
2474 };
2475
2476 static struct pci_driver pch_gbe_driver = {
2477 .name = KBUILD_MODNAME,
2478 .id_table = pch_gbe_pcidev_id,
2479 .probe = pch_gbe_probe,
2480 .remove = pch_gbe_remove,
2481 #ifdef CONFIG_PM
2482 .driver.pm = &pch_gbe_pm_ops,
2483 #endif
2484 .shutdown = pch_gbe_shutdown,
2485 .err_handler = &pch_gbe_err_handler
2486 };
2487
2488
2489 static int __init pch_gbe_init_module(void)
2490 {
2491 int ret;
2492
2493 ret = pci_register_driver(&pch_gbe_driver);
2494 if (copybreak != PCH_GBE_COPYBREAK_DEFAULT) {
2495 if (copybreak == 0) {
2496 pr_info("copybreak disabled\n");
2497 } else {
2498 pr_info("copybreak enabled for packets <= %u bytes\n",
2499 copybreak);
2500 }
2501 }
2502 return ret;
2503 }
2504
2505 static void __exit pch_gbe_exit_module(void)
2506 {
2507 pci_unregister_driver(&pch_gbe_driver);
2508 }
2509
2510 module_init(pch_gbe_init_module);
2511 module_exit(pch_gbe_exit_module);
2512
2513 MODULE_DESCRIPTION("EG20T PCH Gigabit ethernet Driver");
2514 MODULE_AUTHOR("OKI SEMICONDUCTOR, <toshiharu-linux@dsn.okisemi.com>");
2515 MODULE_LICENSE("GPL");
2516 MODULE_VERSION(DRV_VERSION);
2517 MODULE_DEVICE_TABLE(pci, pch_gbe_pcidev_id);
2518
2519 module_param(copybreak, uint, 0644);
2520 MODULE_PARM_DESC(copybreak,
2521 "Maximum size of packet that is copied to a new buffer on receive");
2522
2523 /* pch_gbe_main.c */
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