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enic: Add new firmware devcmds
[linux/fpc-iii.git] / drivers / net / myri10ge / myri10ge.c
blobfb2c0927d3ccd76135d069f29971f238886b0f5a
1 /*************************************************************************
2 * myri10ge.c: Myricom Myri-10G Ethernet driver.
3 *
4 * Copyright (C) 2005 - 2009 Myricom, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of Myricom, Inc. nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 *
31 *
32 * If the eeprom on your board is not recent enough, you will need to get a
33 * newer firmware image at:
34 * http://www.myri.com/scs/download-Myri10GE.html
35 *
36 * Contact Information:
37 * <help@myri.com>
38 * Myricom, Inc., 325N Santa Anita Avenue, Arcadia, CA 91006
39 *************************************************************************/
40
41 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
42
43 #include <linux/tcp.h>
44 #include <linux/netdevice.h>
45 #include <linux/skbuff.h>
46 #include <linux/string.h>
47 #include <linux/module.h>
48 #include <linux/pci.h>
49 #include <linux/dma-mapping.h>
50 #include <linux/etherdevice.h>
51 #include <linux/if_ether.h>
52 #include <linux/if_vlan.h>
53 #include <linux/inet_lro.h>
54 #include <linux/dca.h>
55 #include <linux/ip.h>
56 #include <linux/inet.h>
57 #include <linux/in.h>
58 #include <linux/ethtool.h>
59 #include <linux/firmware.h>
60 #include <linux/delay.h>
61 #include <linux/timer.h>
62 #include <linux/vmalloc.h>
63 #include <linux/crc32.h>
64 #include <linux/moduleparam.h>
65 #include <linux/io.h>
66 #include <linux/log2.h>
67 #include <linux/slab.h>
68 #include <net/checksum.h>
69 #include <net/ip.h>
70 #include <net/tcp.h>
71 #include <asm/byteorder.h>
72 #include <asm/io.h>
73 #include <asm/processor.h>
74 #ifdef CONFIG_MTRR
75 #include <asm/mtrr.h>
76 #endif
77
78 #include "myri10ge_mcp.h"
79 #include "myri10ge_mcp_gen_header.h"
80
81 #define MYRI10GE_VERSION_STR "1.5.2-1.459"
82
83 MODULE_DESCRIPTION("Myricom 10G driver (10GbE)");
84 MODULE_AUTHOR("Maintainer: help@myri.com");
85 MODULE_VERSION(MYRI10GE_VERSION_STR);
86 MODULE_LICENSE("Dual BSD/GPL");
87
88 #define MYRI10GE_MAX_ETHER_MTU 9014
89
90 #define MYRI10GE_ETH_STOPPED 0
91 #define MYRI10GE_ETH_STOPPING 1
92 #define MYRI10GE_ETH_STARTING 2
93 #define MYRI10GE_ETH_RUNNING 3
94 #define MYRI10GE_ETH_OPEN_FAILED 4
95
96 #define MYRI10GE_EEPROM_STRINGS_SIZE 256
97 #define MYRI10GE_MAX_SEND_DESC_TSO ((65536 / 2048) * 2)
98 #define MYRI10GE_MAX_LRO_DESCRIPTORS 8
99 #define MYRI10GE_LRO_MAX_PKTS 64
100
101 #define MYRI10GE_NO_CONFIRM_DATA htonl(0xffffffff)
102 #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff
103
104 #define MYRI10GE_ALLOC_ORDER 0
105 #define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE)
106 #define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1)
107
108 #define MYRI10GE_MAX_SLICES 32
109
110 struct myri10ge_rx_buffer_state {
111 struct page *page;
112 int page_offset;
113 DEFINE_DMA_UNMAP_ADDR(bus);
114 DEFINE_DMA_UNMAP_LEN(len);
115 };
116
117 struct myri10ge_tx_buffer_state {
118 struct sk_buff *skb;
119 int last;
120 DEFINE_DMA_UNMAP_ADDR(bus);
121 DEFINE_DMA_UNMAP_LEN(len);
122 };
123
124 struct myri10ge_cmd {
125 u32 data0;
126 u32 data1;
127 u32 data2;
128 };
129
130 struct myri10ge_rx_buf {
131 struct mcp_kreq_ether_recv __iomem *lanai; /* lanai ptr for recv ring */
132 struct mcp_kreq_ether_recv *shadow; /* host shadow of recv ring */
133 struct myri10ge_rx_buffer_state *info;
134 struct page *page;
135 dma_addr_t bus;
136 int page_offset;
137 int cnt;
138 int fill_cnt;
139 int alloc_fail;
140 int mask; /* number of rx slots -1 */
141 int watchdog_needed;
142 };
143
144 struct myri10ge_tx_buf {
145 struct mcp_kreq_ether_send __iomem *lanai; /* lanai ptr for sendq */
146 __be32 __iomem *send_go; /* "go" doorbell ptr */
147 __be32 __iomem *send_stop; /* "stop" doorbell ptr */
148 struct mcp_kreq_ether_send *req_list; /* host shadow of sendq */
149 char *req_bytes;
150 struct myri10ge_tx_buffer_state *info;
151 int mask; /* number of transmit slots -1 */
152 int req ____cacheline_aligned; /* transmit slots submitted */
153 int pkt_start; /* packets started */
154 int stop_queue;
155 int linearized;
156 int done ____cacheline_aligned; /* transmit slots completed */
157 int pkt_done; /* packets completed */
158 int wake_queue;
159 int queue_active;
160 };
161
162 struct myri10ge_rx_done {
163 struct mcp_slot *entry;
164 dma_addr_t bus;
165 int cnt;
166 int idx;
167 struct net_lro_mgr lro_mgr;
168 struct net_lro_desc lro_desc[MYRI10GE_MAX_LRO_DESCRIPTORS];
169 };
170
171 struct myri10ge_slice_netstats {
172 unsigned long rx_packets;
173 unsigned long tx_packets;
174 unsigned long rx_bytes;
175 unsigned long tx_bytes;
176 unsigned long rx_dropped;
177 unsigned long tx_dropped;
178 };
179
180 struct myri10ge_slice_state {
181 struct myri10ge_tx_buf tx; /* transmit ring */
182 struct myri10ge_rx_buf rx_small;
183 struct myri10ge_rx_buf rx_big;
184 struct myri10ge_rx_done rx_done;
185 struct net_device *dev;
186 struct napi_struct napi;
187 struct myri10ge_priv *mgp;
188 struct myri10ge_slice_netstats stats;
189 __be32 __iomem *irq_claim;
190 struct mcp_irq_data *fw_stats;
191 dma_addr_t fw_stats_bus;
192 int watchdog_tx_done;
193 int watchdog_tx_req;
194 int watchdog_rx_done;
195 #ifdef CONFIG_MYRI10GE_DCA
196 int cached_dca_tag;
197 int cpu;
198 __be32 __iomem *dca_tag;
199 #endif
200 char irq_desc[32];
201 };
202
203 struct myri10ge_priv {
204 struct myri10ge_slice_state *ss;
205 int tx_boundary; /* boundary transmits cannot cross */
206 int num_slices;
207 int running; /* running? */
208 int csum_flag; /* rx_csums? */
209 int small_bytes;
210 int big_bytes;
211 int max_intr_slots;
212 struct net_device *dev;
213 spinlock_t stats_lock;
214 u8 __iomem *sram;
215 int sram_size;
216 unsigned long board_span;
217 unsigned long iomem_base;
218 __be32 __iomem *irq_deassert;
219 char *mac_addr_string;
220 struct mcp_cmd_response *cmd;
221 dma_addr_t cmd_bus;
222 struct pci_dev *pdev;
223 int msi_enabled;
224 int msix_enabled;
225 struct msix_entry *msix_vectors;
226 #ifdef CONFIG_MYRI10GE_DCA
227 int dca_enabled;
228 #endif
229 u32 link_state;
230 unsigned int rdma_tags_available;
231 int intr_coal_delay;
232 __be32 __iomem *intr_coal_delay_ptr;
233 int mtrr;
234 int wc_enabled;
235 int down_cnt;
236 wait_queue_head_t down_wq;
237 struct work_struct watchdog_work;
238 struct timer_list watchdog_timer;
239 int watchdog_resets;
240 int watchdog_pause;
241 int pause;
242 bool fw_name_allocated;
243 char *fw_name;
244 char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
245 char *product_code_string;
246 char fw_version[128];
247 int fw_ver_major;
248 int fw_ver_minor;
249 int fw_ver_tiny;
250 int adopted_rx_filter_bug;
251 u8 mac_addr[6]; /* eeprom mac address */
252 unsigned long serial_number;
253 int vendor_specific_offset;
254 int fw_multicast_support;
255 unsigned long features;
256 u32 max_tso6;
257 u32 read_dma;
258 u32 write_dma;
259 u32 read_write_dma;
260 u32 link_changes;
261 u32 msg_enable;
262 unsigned int board_number;
263 int rebooted;
264 };
265
266 static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
267 static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
268 static char *myri10ge_fw_rss_unaligned = "myri10ge_rss_ethp_z8e.dat";
269 static char *myri10ge_fw_rss_aligned = "myri10ge_rss_eth_z8e.dat";
270 MODULE_FIRMWARE("myri10ge_ethp_z8e.dat");
271 MODULE_FIRMWARE("myri10ge_eth_z8e.dat");
272 MODULE_FIRMWARE("myri10ge_rss_ethp_z8e.dat");
273 MODULE_FIRMWARE("myri10ge_rss_eth_z8e.dat");
274
275 /* Careful: must be accessed under kparam_block_sysfs_write */
276 static char *myri10ge_fw_name = NULL;
277 module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR);
278 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name");
279
280 #define MYRI10GE_MAX_BOARDS 8
281 static char *myri10ge_fw_names[MYRI10GE_MAX_BOARDS] =
282 {[0 ... (MYRI10GE_MAX_BOARDS - 1)] = NULL };
283 module_param_array_named(myri10ge_fw_names, myri10ge_fw_names, charp, NULL,
284 0444);
285 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image names per board");
286
287 static int myri10ge_ecrc_enable = 1;
288 module_param(myri10ge_ecrc_enable, int, S_IRUGO);
289 MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E");
290
291 static int myri10ge_small_bytes = -1; /* -1 == auto */
292 module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR);
293 MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets");
294
295 static int myri10ge_msi = 1; /* enable msi by default */
296 module_param(myri10ge_msi, int, S_IRUGO | S_IWUSR);
297 MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts");
298
299 static int myri10ge_intr_coal_delay = 75;
300 module_param(myri10ge_intr_coal_delay, int, S_IRUGO);
301 MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay");
302
303 static int myri10ge_flow_control = 1;
304 module_param(myri10ge_flow_control, int, S_IRUGO);
305 MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter");
306
307 static int myri10ge_deassert_wait = 1;
308 module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR);
309 MODULE_PARM_DESC(myri10ge_deassert_wait,
310 "Wait when deasserting legacy interrupts");
311
312 static int myri10ge_force_firmware = 0;
313 module_param(myri10ge_force_firmware, int, S_IRUGO);
314 MODULE_PARM_DESC(myri10ge_force_firmware,
315 "Force firmware to assume aligned completions");
316
317 static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
318 module_param(myri10ge_initial_mtu, int, S_IRUGO);
319 MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU");
320
321 static int myri10ge_napi_weight = 64;
322 module_param(myri10ge_napi_weight, int, S_IRUGO);
323 MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight");
324
325 static int myri10ge_watchdog_timeout = 1;
326 module_param(myri10ge_watchdog_timeout, int, S_IRUGO);
327 MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout");
328
329 static int myri10ge_max_irq_loops = 1048576;
330 module_param(myri10ge_max_irq_loops, int, S_IRUGO);
331 MODULE_PARM_DESC(myri10ge_max_irq_loops,
332 "Set stuck legacy IRQ detection threshold");
333
334 #define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK
335
336 static int myri10ge_debug = -1; /* defaults above */
337 module_param(myri10ge_debug, int, 0);
338 MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)");
339
340 static int myri10ge_lro_max_pkts = MYRI10GE_LRO_MAX_PKTS;
341 module_param(myri10ge_lro_max_pkts, int, S_IRUGO);
342 MODULE_PARM_DESC(myri10ge_lro_max_pkts,
343 "Number of LRO packets to be aggregated");
344
345 static int myri10ge_fill_thresh = 256;
346 module_param(myri10ge_fill_thresh, int, S_IRUGO | S_IWUSR);
347 MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed");
348
349 static int myri10ge_reset_recover = 1;
350
351 static int myri10ge_max_slices = 1;
352 module_param(myri10ge_max_slices, int, S_IRUGO);
353 MODULE_PARM_DESC(myri10ge_max_slices, "Max tx/rx queues");
354
355 static int myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_DST_PORT;
356 module_param(myri10ge_rss_hash, int, S_IRUGO);
357 MODULE_PARM_DESC(myri10ge_rss_hash, "Type of RSS hashing to do");
358
359 static int myri10ge_dca = 1;
360 module_param(myri10ge_dca, int, S_IRUGO);
361 MODULE_PARM_DESC(myri10ge_dca, "Enable DCA if possible");
362
363 #define MYRI10GE_FW_OFFSET 1024*1024
364 #define MYRI10GE_HIGHPART_TO_U32(X) \
365 (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0)
366 #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X))
367
368 #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8)
369
370 static void myri10ge_set_multicast_list(struct net_device *dev);
371 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
372 struct net_device *dev);
373
374 static inline void put_be32(__be32 val, __be32 __iomem * p)
375 {
376 __raw_writel((__force __u32) val, (__force void __iomem *)p);
377 }
378
379 static struct net_device_stats *myri10ge_get_stats(struct net_device *dev);
380
381 static void set_fw_name(struct myri10ge_priv *mgp, char *name, bool allocated)
382 {
383 if (mgp->fw_name_allocated)
384 kfree(mgp->fw_name);
385 mgp->fw_name = name;
386 mgp->fw_name_allocated = allocated;
387 }
388
389 static int
390 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
391 struct myri10ge_cmd *data, int atomic)
392 {
393 struct mcp_cmd *buf;
394 char buf_bytes[sizeof(*buf) + 8];
395 struct mcp_cmd_response *response = mgp->cmd;
396 char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD;
397 u32 dma_low, dma_high, result, value;
398 int sleep_total = 0;
399
400 /* ensure buf is aligned to 8 bytes */
401 buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8);
402
403 buf->data0 = htonl(data->data0);
404 buf->data1 = htonl(data->data1);
405 buf->data2 = htonl(data->data2);
406 buf->cmd = htonl(cmd);
407 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
408 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
409
410 buf->response_addr.low = htonl(dma_low);
411 buf->response_addr.high = htonl(dma_high);
412 response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT);
413 mb();
414 myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf));
415
416 /* wait up to 15ms. Longest command is the DMA benchmark,
417 * which is capped at 5ms, but runs from a timeout handler
418 * that runs every 7.8ms. So a 15ms timeout leaves us with
419 * a 2.2ms margin
420 */
421 if (atomic) {
422 /* if atomic is set, do not sleep,
423 * and try to get the completion quickly
424 * (1ms will be enough for those commands) */
425 for (sleep_total = 0;
426 sleep_total < 1000 &&
427 response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
428 sleep_total += 10) {
429 udelay(10);
430 mb();
431 }
432 } else {
433 /* use msleep for most command */
434 for (sleep_total = 0;
435 sleep_total < 15 &&
436 response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
437 sleep_total++)
438 msleep(1);
439 }
440
441 result = ntohl(response->result);
442 value = ntohl(response->data);
443 if (result != MYRI10GE_NO_RESPONSE_RESULT) {
444 if (result == 0) {
445 data->data0 = value;
446 return 0;
447 } else if (result == MXGEFW_CMD_UNKNOWN) {
448 return -ENOSYS;
449 } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) {
450 return -E2BIG;
451 } else if (result == MXGEFW_CMD_ERROR_RANGE &&
452 cmd == MXGEFW_CMD_ENABLE_RSS_QUEUES &&
453 (data->
454 data1 & MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES) !=
455 0) {
456 return -ERANGE;
457 } else {
458 dev_err(&mgp->pdev->dev,
459 "command %d failed, result = %d\n",
460 cmd, result);
461 return -ENXIO;
462 }
463 }
464
465 dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
466 cmd, result);
467 return -EAGAIN;
468 }
469
470 /*
471 * The eeprom strings on the lanaiX have the format
472 * SN=x\0
473 * MAC=x:x:x:x:x:x\0
474 * PT:ddd mmm xx xx:xx:xx xx\0
475 * PV:ddd mmm xx xx:xx:xx xx\0
476 */
477 static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp)
478 {
479 char *ptr, *limit;
480 int i;
481
482 ptr = mgp->eeprom_strings;
483 limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE;
484
485 while (*ptr != '\0' && ptr < limit) {
486 if (memcmp(ptr, "MAC=", 4) == 0) {
487 ptr += 4;
488 mgp->mac_addr_string = ptr;
489 for (i = 0; i < 6; i++) {
490 if ((ptr + 2) > limit)
491 goto abort;
492 mgp->mac_addr[i] =
493 simple_strtoul(ptr, &ptr, 16);
494 ptr += 1;
495 }
496 }
497 if (memcmp(ptr, "PC=", 3) == 0) {
498 ptr += 3;
499 mgp->product_code_string = ptr;
500 }
501 if (memcmp((const void *)ptr, "SN=", 3) == 0) {
502 ptr += 3;
503 mgp->serial_number = simple_strtoul(ptr, &ptr, 10);
504 }
505 while (ptr < limit && *ptr++) ;
506 }
507
508 return 0;
509
510 abort:
511 dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n");
512 return -ENXIO;
513 }
514
515 /*
516 * Enable or disable periodic RDMAs from the host to make certain
517 * chipsets resend dropped PCIe messages
518 */
519
520 static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable)
521 {
522 char __iomem *submit;
523 __be32 buf[16] __attribute__ ((__aligned__(8)));
524 u32 dma_low, dma_high;
525 int i;
526
527 /* clear confirmation addr */
528 mgp->cmd->data = 0;
529 mb();
530
531 /* send a rdma command to the PCIe engine, and wait for the
532 * response in the confirmation address. The firmware should
533 * write a -1 there to indicate it is alive and well
534 */
535 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
536 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
537
538 buf[0] = htonl(dma_high); /* confirm addr MSW */
539 buf[1] = htonl(dma_low); /* confirm addr LSW */
540 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */
541 buf[3] = htonl(dma_high); /* dummy addr MSW */
542 buf[4] = htonl(dma_low); /* dummy addr LSW */
543 buf[5] = htonl(enable); /* enable? */
544
545 submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA;
546
547 myri10ge_pio_copy(submit, &buf, sizeof(buf));
548 for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++)
549 msleep(1);
550 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA)
551 dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n",
552 (enable ? "enable" : "disable"));
553 }
554
555 static int
556 myri10ge_validate_firmware(struct myri10ge_priv *mgp,
557 struct mcp_gen_header *hdr)
558 {
559 struct device *dev = &mgp->pdev->dev;
560
561 /* check firmware type */
562 if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) {
563 dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type));
564 return -EINVAL;
565 }
566
567 /* save firmware version for ethtool */
568 strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
569
570 sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major,
571 &mgp->fw_ver_minor, &mgp->fw_ver_tiny);
572
573 if (!(mgp->fw_ver_major == MXGEFW_VERSION_MAJOR &&
574 mgp->fw_ver_minor == MXGEFW_VERSION_MINOR)) {
575 dev_err(dev, "Found firmware version %s\n", mgp->fw_version);
576 dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR,
577 MXGEFW_VERSION_MINOR);
578 return -EINVAL;
579 }
580 return 0;
581 }
582
583 static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
584 {
585 unsigned crc, reread_crc;
586 const struct firmware *fw;
587 struct device *dev = &mgp->pdev->dev;
588 unsigned char *fw_readback;
589 struct mcp_gen_header *hdr;
590 size_t hdr_offset;
591 int status;
592 unsigned i;
593
594 if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) {
595 dev_err(dev, "Unable to load %s firmware image via hotplug\n",
596 mgp->fw_name);
597 status = -EINVAL;
598 goto abort_with_nothing;
599 }
600
601 /* check size */
602
603 if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET ||
604 fw->size < MCP_HEADER_PTR_OFFSET + 4) {
605 dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size);
606 status = -EINVAL;
607 goto abort_with_fw;
608 }
609
610 /* check id */
611 hdr_offset = ntohl(*(__be32 *) (fw->data + MCP_HEADER_PTR_OFFSET));
612 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) {
613 dev_err(dev, "Bad firmware file\n");
614 status = -EINVAL;
615 goto abort_with_fw;
616 }
617 hdr = (void *)(fw->data + hdr_offset);
618
619 status = myri10ge_validate_firmware(mgp, hdr);
620 if (status != 0)
621 goto abort_with_fw;
622
623 crc = crc32(~0, fw->data, fw->size);
624 for (i = 0; i < fw->size; i += 256) {
625 myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i,
626 fw->data + i,
627 min(256U, (unsigned)(fw->size - i)));
628 mb();
629 readb(mgp->sram);
630 }
631 fw_readback = vmalloc(fw->size);
632 if (!fw_readback) {
633 status = -ENOMEM;
634 goto abort_with_fw;
635 }
636 /* corruption checking is good for parity recovery and buggy chipset */
637 memcpy_fromio(fw_readback, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);
638 reread_crc = crc32(~0, fw_readback, fw->size);
639 vfree(fw_readback);
640 if (crc != reread_crc) {
641 dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n",
642 (unsigned)fw->size, reread_crc, crc);
643 status = -EIO;
644 goto abort_with_fw;
645 }
646 *size = (u32) fw->size;
647
648 abort_with_fw:
649 release_firmware(fw);
650
651 abort_with_nothing:
652 return status;
653 }
654
655 static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp)
656 {
657 struct mcp_gen_header *hdr;
658 struct device *dev = &mgp->pdev->dev;
659 const size_t bytes = sizeof(struct mcp_gen_header);
660 size_t hdr_offset;
661 int status;
662
663 /* find running firmware header */
664 hdr_offset = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
665
666 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) {
667 dev_err(dev, "Running firmware has bad header offset (%d)\n",
668 (int)hdr_offset);
669 return -EIO;
670 }
671
672 /* copy header of running firmware from SRAM to host memory to
673 * validate firmware */
674 hdr = kmalloc(bytes, GFP_KERNEL);
675 if (hdr == NULL) {
676 dev_err(dev, "could not malloc firmware hdr\n");
677 return -ENOMEM;
678 }
679 memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes);
680 status = myri10ge_validate_firmware(mgp, hdr);
681 kfree(hdr);
682
683 /* check to see if adopted firmware has bug where adopting
684 * it will cause broadcasts to be filtered unless the NIC
685 * is kept in ALLMULTI mode */
686 if (mgp->fw_ver_major == 1 && mgp->fw_ver_minor == 4 &&
687 mgp->fw_ver_tiny >= 4 && mgp->fw_ver_tiny <= 11) {
688 mgp->adopted_rx_filter_bug = 1;
689 dev_warn(dev, "Adopting fw %d.%d.%d: "
690 "working around rx filter bug\n",
691 mgp->fw_ver_major, mgp->fw_ver_minor,
692 mgp->fw_ver_tiny);
693 }
694 return status;
695 }
696
697 static int myri10ge_get_firmware_capabilities(struct myri10ge_priv *mgp)
698 {
699 struct myri10ge_cmd cmd;
700 int status;
701
702 /* probe for IPv6 TSO support */
703 mgp->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
704 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_TSO6_HDR_SIZE,
705 &cmd, 0);
706 if (status == 0) {
707 mgp->max_tso6 = cmd.data0;
708 mgp->features |= NETIF_F_TSO6;
709 }
710
711 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
712 if (status != 0) {
713 dev_err(&mgp->pdev->dev,
714 "failed MXGEFW_CMD_GET_RX_RING_SIZE\n");
715 return -ENXIO;
716 }
717
718 mgp->max_intr_slots = 2 * (cmd.data0 / sizeof(struct mcp_dma_addr));
719
720 return 0;
721 }
722
723 static int myri10ge_load_firmware(struct myri10ge_priv *mgp, int adopt)
724 {
725 char __iomem *submit;
726 __be32 buf[16] __attribute__ ((__aligned__(8)));
727 u32 dma_low, dma_high, size;
728 int status, i;
729
730 size = 0;
731 status = myri10ge_load_hotplug_firmware(mgp, &size);
732 if (status) {
733 if (!adopt)
734 return status;
735 dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n");
736
737 /* Do not attempt to adopt firmware if there
738 * was a bad crc */
739 if (status == -EIO)
740 return status;
741
742 status = myri10ge_adopt_running_firmware(mgp);
743 if (status != 0) {
744 dev_err(&mgp->pdev->dev,
745 "failed to adopt running firmware\n");
746 return status;
747 }
748 dev_info(&mgp->pdev->dev,
749 "Successfully adopted running firmware\n");
750 if (mgp->tx_boundary == 4096) {
751 dev_warn(&mgp->pdev->dev,
752 "Using firmware currently running on NIC"
753 ". For optimal\n");
754 dev_warn(&mgp->pdev->dev,
755 "performance consider loading optimized "
756 "firmware\n");
757 dev_warn(&mgp->pdev->dev, "via hotplug\n");
758 }
759
760 set_fw_name(mgp, "adopted", false);
761 mgp->tx_boundary = 2048;
762 myri10ge_dummy_rdma(mgp, 1);
763 status = myri10ge_get_firmware_capabilities(mgp);
764 return status;
765 }
766
767 /* clear confirmation addr */
768 mgp->cmd->data = 0;
769 mb();
770
771 /* send a reload command to the bootstrap MCP, and wait for the
772 * response in the confirmation address. The firmware should
773 * write a -1 there to indicate it is alive and well
774 */
775 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
776 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
777
778 buf[0] = htonl(dma_high); /* confirm addr MSW */
779 buf[1] = htonl(dma_low); /* confirm addr LSW */
780 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */
781
782 /* FIX: All newest firmware should un-protect the bottom of
783 * the sram before handoff. However, the very first interfaces
784 * do not. Therefore the handoff copy must skip the first 8 bytes
785 */
786 buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */
787 buf[4] = htonl(size - 8); /* length of code */
788 buf[5] = htonl(8); /* where to copy to */
789 buf[6] = htonl(0); /* where to jump to */
790
791 submit = mgp->sram + MXGEFW_BOOT_HANDOFF;
792
793 myri10ge_pio_copy(submit, &buf, sizeof(buf));
794 mb();
795 msleep(1);
796 mb();
797 i = 0;
798 while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 9) {
799 msleep(1 << i);
800 i++;
801 }
802 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) {
803 dev_err(&mgp->pdev->dev, "handoff failed\n");
804 return -ENXIO;
805 }
806 myri10ge_dummy_rdma(mgp, 1);
807 status = myri10ge_get_firmware_capabilities(mgp);
808
809 return status;
810 }
811
812 static int myri10ge_update_mac_address(struct myri10ge_priv *mgp, u8 * addr)
813 {
814 struct myri10ge_cmd cmd;
815 int status;
816
817 cmd.data0 = ((addr[0] << 24) | (addr[1] << 16)
818 | (addr[2] << 8) | addr[3]);
819
820 cmd.data1 = ((addr[4] << 8) | (addr[5]));
821
822 status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0);
823 return status;
824 }
825
826 static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause)
827 {
828 struct myri10ge_cmd cmd;
829 int status, ctl;
830
831 ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL;
832 status = myri10ge_send_cmd(mgp, ctl, &cmd, 0);
833
834 if (status) {
835 netdev_err(mgp->dev, "Failed to set flow control mode\n");
836 return status;
837 }
838 mgp->pause = pause;
839 return 0;
840 }
841
842 static void
843 myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic)
844 {
845 struct myri10ge_cmd cmd;
846 int status, ctl;
847
848 ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC;
849 status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic);
850 if (status)
851 netdev_err(mgp->dev, "Failed to set promisc mode\n");
852 }
853
854 static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type)
855 {
856 struct myri10ge_cmd cmd;
857 int status;
858 u32 len;
859 struct page *dmatest_page;
860 dma_addr_t dmatest_bus;
861 char *test = " ";
862
863 dmatest_page = alloc_page(GFP_KERNEL);
864 if (!dmatest_page)
865 return -ENOMEM;
866 dmatest_bus = pci_map_page(mgp->pdev, dmatest_page, 0, PAGE_SIZE,
867 DMA_BIDIRECTIONAL);
868
869 /* Run a small DMA test.
870 * The magic multipliers to the length tell the firmware
871 * to do DMA read, write, or read+write tests. The
872 * results are returned in cmd.data0. The upper 16
873 * bits or the return is the number of transfers completed.
874 * The lower 16 bits is the time in 0.5us ticks that the
875 * transfers took to complete.
876 */
877
878 len = mgp->tx_boundary;
879
880 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
881 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
882 cmd.data2 = len * 0x10000;
883 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
884 if (status != 0) {
885 test = "read";
886 goto abort;
887 }
888 mgp->read_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
889 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
890 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
891 cmd.data2 = len * 0x1;
892 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
893 if (status != 0) {
894 test = "write";
895 goto abort;
896 }
897 mgp->write_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
898
899 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
900 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
901 cmd.data2 = len * 0x10001;
902 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
903 if (status != 0) {
904 test = "read/write";
905 goto abort;
906 }
907 mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) /
908 (cmd.data0 & 0xffff);
909
910 abort:
911 pci_unmap_page(mgp->pdev, dmatest_bus, PAGE_SIZE, DMA_BIDIRECTIONAL);
912 put_page(dmatest_page);
913
914 if (status != 0 && test_type != MXGEFW_CMD_UNALIGNED_TEST)
915 dev_warn(&mgp->pdev->dev, "DMA %s benchmark failed: %d\n",
916 test, status);
917
918 return status;
919 }
920
921 static int myri10ge_reset(struct myri10ge_priv *mgp)
922 {
923 struct myri10ge_cmd cmd;
924 struct myri10ge_slice_state *ss;
925 int i, status;
926 size_t bytes;
927 #ifdef CONFIG_MYRI10GE_DCA
928 unsigned long dca_tag_off;
929 #endif
930
931 /* try to send a reset command to the card to see if it
932 * is alive */
933 memset(&cmd, 0, sizeof(cmd));
934 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
935 if (status != 0) {
936 dev_err(&mgp->pdev->dev, "failed reset\n");
937 return -ENXIO;
938 }
939
940 (void)myri10ge_dma_test(mgp, MXGEFW_DMA_TEST);
941 /*
942 * Use non-ndis mcp_slot (eg, 4 bytes total,
943 * no toeplitz hash value returned. Older firmware will
944 * not understand this command, but will use the correct
945 * sized mcp_slot, so we ignore error returns
946 */
947 cmd.data0 = MXGEFW_RSS_MCP_SLOT_TYPE_MIN;
948 (void)myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_MCP_SLOT_TYPE, &cmd, 0);
949
950 /* Now exchange information about interrupts */
951
952 bytes = mgp->max_intr_slots * sizeof(*mgp->ss[0].rx_done.entry);
953 cmd.data0 = (u32) bytes;
954 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
955
956 /*
957 * Even though we already know how many slices are supported
958 * via myri10ge_probe_slices() MXGEFW_CMD_GET_MAX_RSS_QUEUES
959 * has magic side effects, and must be called after a reset.
960 * It must be called prior to calling any RSS related cmds,
961 * including assigning an interrupt queue for anything but
962 * slice 0. It must also be called *after*
963 * MXGEFW_CMD_SET_INTRQ_SIZE, since the intrq size is used by
964 * the firmware to compute offsets.
965 */
966
967 if (mgp->num_slices > 1) {
968
969 /* ask the maximum number of slices it supports */
970 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES,
971 &cmd, 0);
972 if (status != 0) {
973 dev_err(&mgp->pdev->dev,
974 "failed to get number of slices\n");
975 }
976
977 /*
978 * MXGEFW_CMD_ENABLE_RSS_QUEUES must be called prior
979 * to setting up the interrupt queue DMA
980 */
981
982 cmd.data0 = mgp->num_slices;
983 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
984 if (mgp->dev->real_num_tx_queues > 1)
985 cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
986 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
987 &cmd, 0);
988
989 /* Firmware older than 1.4.32 only supports multiple
990 * RX queues, so if we get an error, first retry using a
991 * single TX queue before giving up */
992 if (status != 0 && mgp->dev->real_num_tx_queues > 1) {
993 mgp->dev->real_num_tx_queues = 1;
994 cmd.data0 = mgp->num_slices;
995 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
996 status = myri10ge_send_cmd(mgp,
997 MXGEFW_CMD_ENABLE_RSS_QUEUES,
998 &cmd, 0);
999 }
1000
1001 if (status != 0) {
1002 dev_err(&mgp->pdev->dev,
1003 "failed to set number of slices\n");
1004
1005 return status;
1006 }
1007 }
1008 for (i = 0; i < mgp->num_slices; i++) {
1009 ss = &mgp->ss[i];
1010 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->rx_done.bus);
1011 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->rx_done.bus);
1012 cmd.data2 = i;
1013 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA,
1014 &cmd, 0);
1015 };
1016
1017 status |=
1018 myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0);
1019 for (i = 0; i < mgp->num_slices; i++) {
1020 ss = &mgp->ss[i];
1021 ss->irq_claim =
1022 (__iomem __be32 *) (mgp->sram + cmd.data0 + 8 * i);
1023 }
1024 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET,
1025 &cmd, 0);
1026 mgp->irq_deassert = (__iomem __be32 *) (mgp->sram + cmd.data0);
1027
1028 status |= myri10ge_send_cmd
1029 (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0);
1030 mgp->intr_coal_delay_ptr = (__iomem __be32 *) (mgp->sram + cmd.data0);
1031 if (status != 0) {
1032 dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n");
1033 return status;
1034 }
1035 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1036
1037 #ifdef CONFIG_MYRI10GE_DCA
1038 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_DCA_OFFSET, &cmd, 0);
1039 dca_tag_off = cmd.data0;
1040 for (i = 0; i < mgp->num_slices; i++) {
1041 ss = &mgp->ss[i];
1042 if (status == 0) {
1043 ss->dca_tag = (__iomem __be32 *)
1044 (mgp->sram + dca_tag_off + 4 * i);
1045 } else {
1046 ss->dca_tag = NULL;
1047 }
1048 }
1049 #endif /* CONFIG_MYRI10GE_DCA */
1050
1051 /* reset mcp/driver shared state back to 0 */
1052
1053 mgp->link_changes = 0;
1054 for (i = 0; i < mgp->num_slices; i++) {
1055 ss = &mgp->ss[i];
1056
1057 memset(ss->rx_done.entry, 0, bytes);
1058 ss->tx.req = 0;
1059 ss->tx.done = 0;
1060 ss->tx.pkt_start = 0;
1061 ss->tx.pkt_done = 0;
1062 ss->rx_big.cnt = 0;
1063 ss->rx_small.cnt = 0;
1064 ss->rx_done.idx = 0;
1065 ss->rx_done.cnt = 0;
1066 ss->tx.wake_queue = 0;
1067 ss->tx.stop_queue = 0;
1068 }
1069
1070 status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr);
1071 myri10ge_change_pause(mgp, mgp->pause);
1072 myri10ge_set_multicast_list(mgp->dev);
1073 return status;
1074 }
1075
1076 #ifdef CONFIG_MYRI10GE_DCA
1077 static void
1078 myri10ge_write_dca(struct myri10ge_slice_state *ss, int cpu, int tag)
1079 {
1080 ss->cpu = cpu;
1081 ss->cached_dca_tag = tag;
1082 put_be32(htonl(tag), ss->dca_tag);
1083 }
1084
1085 static inline void myri10ge_update_dca(struct myri10ge_slice_state *ss)
1086 {
1087 int cpu = get_cpu();
1088 int tag;
1089
1090 if (cpu != ss->cpu) {
1091 tag = dca_get_tag(cpu);
1092 if (ss->cached_dca_tag != tag)
1093 myri10ge_write_dca(ss, cpu, tag);
1094 }
1095 put_cpu();
1096 }
1097
1098 static void myri10ge_setup_dca(struct myri10ge_priv *mgp)
1099 {
1100 int err, i;
1101 struct pci_dev *pdev = mgp->pdev;
1102
1103 if (mgp->ss[0].dca_tag == NULL || mgp->dca_enabled)
1104 return;
1105 if (!myri10ge_dca) {
1106 dev_err(&pdev->dev, "dca disabled by administrator\n");
1107 return;
1108 }
1109 err = dca_add_requester(&pdev->dev);
1110 if (err) {
1111 if (err != -ENODEV)
1112 dev_err(&pdev->dev,
1113 "dca_add_requester() failed, err=%d\n", err);
1114 return;
1115 }
1116 mgp->dca_enabled = 1;
1117 for (i = 0; i < mgp->num_slices; i++)
1118 myri10ge_write_dca(&mgp->ss[i], -1, 0);
1119 }
1120
1121 static void myri10ge_teardown_dca(struct myri10ge_priv *mgp)
1122 {
1123 struct pci_dev *pdev = mgp->pdev;
1124 int err;
1125
1126 if (!mgp->dca_enabled)
1127 return;
1128 mgp->dca_enabled = 0;
1129 err = dca_remove_requester(&pdev->dev);
1130 }
1131
1132 static int myri10ge_notify_dca_device(struct device *dev, void *data)
1133 {
1134 struct myri10ge_priv *mgp;
1135 unsigned long event;
1136
1137 mgp = dev_get_drvdata(dev);
1138 event = *(unsigned long *)data;
1139
1140 if (event == DCA_PROVIDER_ADD)
1141 myri10ge_setup_dca(mgp);
1142 else if (event == DCA_PROVIDER_REMOVE)
1143 myri10ge_teardown_dca(mgp);
1144 return 0;
1145 }
1146 #endif /* CONFIG_MYRI10GE_DCA */
1147
1148 static inline void
1149 myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst,
1150 struct mcp_kreq_ether_recv *src)
1151 {
1152 __be32 low;
1153
1154 low = src->addr_low;
1155 src->addr_low = htonl(DMA_BIT_MASK(32));
1156 myri10ge_pio_copy(dst, src, 4 * sizeof(*src));
1157 mb();
1158 myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src));
1159 mb();
1160 src->addr_low = low;
1161 put_be32(low, &dst->addr_low);
1162 mb();
1163 }
1164
1165 static inline void myri10ge_vlan_ip_csum(struct sk_buff *skb, __wsum hw_csum)
1166 {
1167 struct vlan_hdr *vh = (struct vlan_hdr *)(skb->data);
1168
1169 if ((skb->protocol == htons(ETH_P_8021Q)) &&
1170 (vh->h_vlan_encapsulated_proto == htons(ETH_P_IP) ||
1171 vh->h_vlan_encapsulated_proto == htons(ETH_P_IPV6))) {
1172 skb->csum = hw_csum;
1173 skb->ip_summed = CHECKSUM_COMPLETE;
1174 }
1175 }
1176
1177 static inline void
1178 myri10ge_rx_skb_build(struct sk_buff *skb, u8 * va,
1179 struct skb_frag_struct *rx_frags, int len, int hlen)
1180 {
1181 struct skb_frag_struct *skb_frags;
1182
1183 skb->len = skb->data_len = len;
1184 skb->truesize = len + sizeof(struct sk_buff);
1185 /* attach the page(s) */
1186
1187 skb_frags = skb_shinfo(skb)->frags;
1188 while (len > 0) {
1189 memcpy(skb_frags, rx_frags, sizeof(*skb_frags));
1190 len -= rx_frags->size;
1191 skb_frags++;
1192 rx_frags++;
1193 skb_shinfo(skb)->nr_frags++;
1194 }
1195
1196 /* pskb_may_pull is not available in irq context, but
1197 * skb_pull() (for ether_pad and eth_type_trans()) requires
1198 * the beginning of the packet in skb_headlen(), move it
1199 * manually */
1200 skb_copy_to_linear_data(skb, va, hlen);
1201 skb_shinfo(skb)->frags[0].page_offset += hlen;
1202 skb_shinfo(skb)->frags[0].size -= hlen;
1203 skb->data_len -= hlen;
1204 skb->tail += hlen;
1205 skb_pull(skb, MXGEFW_PAD);
1206 }
1207
1208 static void
1209 myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
1210 int bytes, int watchdog)
1211 {
1212 struct page *page;
1213 int idx;
1214 #if MYRI10GE_ALLOC_SIZE > 4096
1215 int end_offset;
1216 #endif
1217
1218 if (unlikely(rx->watchdog_needed && !watchdog))
1219 return;
1220
1221 /* try to refill entire ring */
1222 while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) {
1223 idx = rx->fill_cnt & rx->mask;
1224 if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) {
1225 /* we can use part of previous page */
1226 get_page(rx->page);
1227 } else {
1228 /* we need a new page */
1229 page =
1230 alloc_pages(GFP_ATOMIC | __GFP_COMP,
1231 MYRI10GE_ALLOC_ORDER);
1232 if (unlikely(page == NULL)) {
1233 if (rx->fill_cnt - rx->cnt < 16)
1234 rx->watchdog_needed = 1;
1235 return;
1236 }
1237 rx->page = page;
1238 rx->page_offset = 0;
1239 rx->bus = pci_map_page(mgp->pdev, page, 0,
1240 MYRI10GE_ALLOC_SIZE,
1241 PCI_DMA_FROMDEVICE);
1242 }
1243 rx->info[idx].page = rx->page;
1244 rx->info[idx].page_offset = rx->page_offset;
1245 /* note that this is the address of the start of the
1246 * page */
1247 dma_unmap_addr_set(&rx->info[idx], bus, rx->bus);
1248 rx->shadow[idx].addr_low =
1249 htonl(MYRI10GE_LOWPART_TO_U32(rx->bus) + rx->page_offset);
1250 rx->shadow[idx].addr_high =
1251 htonl(MYRI10GE_HIGHPART_TO_U32(rx->bus));
1252
1253 /* start next packet on a cacheline boundary */
1254 rx->page_offset += SKB_DATA_ALIGN(bytes);
1255
1256 #if MYRI10GE_ALLOC_SIZE > 4096
1257 /* don't cross a 4KB boundary */
1258 end_offset = rx->page_offset + bytes - 1;
1259 if ((unsigned)(rx->page_offset ^ end_offset) > 4095)
1260 rx->page_offset = end_offset & ~4095;
1261 #endif
1262 rx->fill_cnt++;
1263
1264 /* copy 8 descriptors to the firmware at a time */
1265 if ((idx & 7) == 7) {
1266 myri10ge_submit_8rx(&rx->lanai[idx - 7],
1267 &rx->shadow[idx - 7]);
1268 }
1269 }
1270 }
1271
1272 static inline void
1273 myri10ge_unmap_rx_page(struct pci_dev *pdev,
1274 struct myri10ge_rx_buffer_state *info, int bytes)
1275 {
1276 /* unmap the recvd page if we're the only or last user of it */
1277 if (bytes >= MYRI10GE_ALLOC_SIZE / 2 ||
1278 (info->page_offset + 2 * bytes) > MYRI10GE_ALLOC_SIZE) {
1279 pci_unmap_page(pdev, (dma_unmap_addr(info, bus)
1280 & ~(MYRI10GE_ALLOC_SIZE - 1)),
1281 MYRI10GE_ALLOC_SIZE, PCI_DMA_FROMDEVICE);
1282 }
1283 }
1284
1285 #define MYRI10GE_HLEN 64 /* The number of bytes to copy from a
1286 * page into an skb */
1287
1288 static inline int
1289 myri10ge_rx_done(struct myri10ge_slice_state *ss, struct myri10ge_rx_buf *rx,
1290 int bytes, int len, __wsum csum)
1291 {
1292 struct myri10ge_priv *mgp = ss->mgp;
1293 struct sk_buff *skb;
1294 struct skb_frag_struct rx_frags[MYRI10GE_MAX_FRAGS_PER_FRAME];
1295 int i, idx, hlen, remainder;
1296 struct pci_dev *pdev = mgp->pdev;
1297 struct net_device *dev = mgp->dev;
1298 u8 *va;
1299
1300 len += MXGEFW_PAD;
1301 idx = rx->cnt & rx->mask;
1302 va = page_address(rx->info[idx].page) + rx->info[idx].page_offset;
1303 prefetch(va);
1304 /* Fill skb_frag_struct(s) with data from our receive */
1305 for (i = 0, remainder = len; remainder > 0; i++) {
1306 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1307 rx_frags[i].page = rx->info[idx].page;
1308 rx_frags[i].page_offset = rx->info[idx].page_offset;
1309 if (remainder < MYRI10GE_ALLOC_SIZE)
1310 rx_frags[i].size = remainder;
1311 else
1312 rx_frags[i].size = MYRI10GE_ALLOC_SIZE;
1313 rx->cnt++;
1314 idx = rx->cnt & rx->mask;
1315 remainder -= MYRI10GE_ALLOC_SIZE;
1316 }
1317
1318 if (dev->features & NETIF_F_LRO) {
1319 rx_frags[0].page_offset += MXGEFW_PAD;
1320 rx_frags[0].size -= MXGEFW_PAD;
1321 len -= MXGEFW_PAD;
1322 lro_receive_frags(&ss->rx_done.lro_mgr, rx_frags,
1323 /* opaque, will come back in get_frag_header */
1324 len, len,
1325 (void *)(__force unsigned long)csum, csum);
1326
1327 return 1;
1328 }
1329
1330 hlen = MYRI10GE_HLEN > len ? len : MYRI10GE_HLEN;
1331
1332 /* allocate an skb to attach the page(s) to. This is done
1333 * after trying LRO, so as to avoid skb allocation overheads */
1334
1335 skb = netdev_alloc_skb(dev, MYRI10GE_HLEN + 16);
1336 if (unlikely(skb == NULL)) {
1337 ss->stats.rx_dropped++;
1338 do {
1339 i--;
1340 put_page(rx_frags[i].page);
1341 } while (i != 0);
1342 return 0;
1343 }
1344
1345 /* Attach the pages to the skb, and trim off any padding */
1346 myri10ge_rx_skb_build(skb, va, rx_frags, len, hlen);
1347 if (skb_shinfo(skb)->frags[0].size <= 0) {
1348 put_page(skb_shinfo(skb)->frags[0].page);
1349 skb_shinfo(skb)->nr_frags = 0;
1350 }
1351 skb->protocol = eth_type_trans(skb, dev);
1352 skb_record_rx_queue(skb, ss - &mgp->ss[0]);
1353
1354 if (mgp->csum_flag) {
1355 if ((skb->protocol == htons(ETH_P_IP)) ||
1356 (skb->protocol == htons(ETH_P_IPV6))) {
1357 skb->csum = csum;
1358 skb->ip_summed = CHECKSUM_COMPLETE;
1359 } else
1360 myri10ge_vlan_ip_csum(skb, csum);
1361 }
1362 netif_receive_skb(skb);
1363 return 1;
1364 }
1365
1366 static inline void
1367 myri10ge_tx_done(struct myri10ge_slice_state *ss, int mcp_index)
1368 {
1369 struct pci_dev *pdev = ss->mgp->pdev;
1370 struct myri10ge_tx_buf *tx = &ss->tx;
1371 struct netdev_queue *dev_queue;
1372 struct sk_buff *skb;
1373 int idx, len;
1374
1375 while (tx->pkt_done != mcp_index) {
1376 idx = tx->done & tx->mask;
1377 skb = tx->info[idx].skb;
1378
1379 /* Mark as free */
1380 tx->info[idx].skb = NULL;
1381 if (tx->info[idx].last) {
1382 tx->pkt_done++;
1383 tx->info[idx].last = 0;
1384 }
1385 tx->done++;
1386 len = dma_unmap_len(&tx->info[idx], len);
1387 dma_unmap_len_set(&tx->info[idx], len, 0);
1388 if (skb) {
1389 ss->stats.tx_bytes += skb->len;
1390 ss->stats.tx_packets++;
1391 dev_kfree_skb_irq(skb);
1392 if (len)
1393 pci_unmap_single(pdev,
1394 dma_unmap_addr(&tx->info[idx],
1395 bus), len,
1396 PCI_DMA_TODEVICE);
1397 } else {
1398 if (len)
1399 pci_unmap_page(pdev,
1400 dma_unmap_addr(&tx->info[idx],
1401 bus), len,
1402 PCI_DMA_TODEVICE);
1403 }
1404 }
1405
1406 dev_queue = netdev_get_tx_queue(ss->dev, ss - ss->mgp->ss);
1407 /*
1408 * Make a minimal effort to prevent the NIC from polling an
1409 * idle tx queue. If we can't get the lock we leave the queue
1410 * active. In this case, either a thread was about to start
1411 * using the queue anyway, or we lost a race and the NIC will
1412 * waste some of its resources polling an inactive queue for a
1413 * while.
1414 */
1415
1416 if ((ss->mgp->dev->real_num_tx_queues > 1) &&
1417 __netif_tx_trylock(dev_queue)) {
1418 if (tx->req == tx->done) {
1419 tx->queue_active = 0;
1420 put_be32(htonl(1), tx->send_stop);
1421 mb();
1422 mmiowb();
1423 }
1424 __netif_tx_unlock(dev_queue);
1425 }
1426
1427 /* start the queue if we've stopped it */
1428 if (netif_tx_queue_stopped(dev_queue) &&
1429 tx->req - tx->done < (tx->mask >> 1)) {
1430 tx->wake_queue++;
1431 netif_tx_wake_queue(dev_queue);
1432 }
1433 }
1434
1435 static inline int
1436 myri10ge_clean_rx_done(struct myri10ge_slice_state *ss, int budget)
1437 {
1438 struct myri10ge_rx_done *rx_done = &ss->rx_done;
1439 struct myri10ge_priv *mgp = ss->mgp;
1440 struct net_device *netdev = mgp->dev;
1441 unsigned long rx_bytes = 0;
1442 unsigned long rx_packets = 0;
1443 unsigned long rx_ok;
1444
1445 int idx = rx_done->idx;
1446 int cnt = rx_done->cnt;
1447 int work_done = 0;
1448 u16 length;
1449 __wsum checksum;
1450
1451 while (rx_done->entry[idx].length != 0 && work_done < budget) {
1452 length = ntohs(rx_done->entry[idx].length);
1453 rx_done->entry[idx].length = 0;
1454 checksum = csum_unfold(rx_done->entry[idx].checksum);
1455 if (length <= mgp->small_bytes)
1456 rx_ok = myri10ge_rx_done(ss, &ss->rx_small,
1457 mgp->small_bytes,
1458 length, checksum);
1459 else
1460 rx_ok = myri10ge_rx_done(ss, &ss->rx_big,
1461 mgp->big_bytes,
1462 length, checksum);
1463 rx_packets += rx_ok;
1464 rx_bytes += rx_ok * (unsigned long)length;
1465 cnt++;
1466 idx = cnt & (mgp->max_intr_slots - 1);
1467 work_done++;
1468 }
1469 rx_done->idx = idx;
1470 rx_done->cnt = cnt;
1471 ss->stats.rx_packets += rx_packets;
1472 ss->stats.rx_bytes += rx_bytes;
1473
1474 if (netdev->features & NETIF_F_LRO)
1475 lro_flush_all(&rx_done->lro_mgr);
1476
1477 /* restock receive rings if needed */
1478 if (ss->rx_small.fill_cnt - ss->rx_small.cnt < myri10ge_fill_thresh)
1479 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
1480 mgp->small_bytes + MXGEFW_PAD, 0);
1481 if (ss->rx_big.fill_cnt - ss->rx_big.cnt < myri10ge_fill_thresh)
1482 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
1483
1484 return work_done;
1485 }
1486
1487 static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
1488 {
1489 struct mcp_irq_data *stats = mgp->ss[0].fw_stats;
1490
1491 if (unlikely(stats->stats_updated)) {
1492 unsigned link_up = ntohl(stats->link_up);
1493 if (mgp->link_state != link_up) {
1494 mgp->link_state = link_up;
1495
1496 if (mgp->link_state == MXGEFW_LINK_UP) {
1497 if (netif_msg_link(mgp))
1498 netdev_info(mgp->dev, "link up\n");
1499 netif_carrier_on(mgp->dev);
1500 mgp->link_changes++;
1501 } else {
1502 if (netif_msg_link(mgp))
1503 netdev_info(mgp->dev, "link %s\n",
1504 link_up == MXGEFW_LINK_MYRINET ?
1505 "mismatch (Myrinet detected)" :
1506 "down");
1507 netif_carrier_off(mgp->dev);
1508 mgp->link_changes++;
1509 }
1510 }
1511 if (mgp->rdma_tags_available !=
1512 ntohl(stats->rdma_tags_available)) {
1513 mgp->rdma_tags_available =
1514 ntohl(stats->rdma_tags_available);
1515 netdev_warn(mgp->dev, "RDMA timed out! %d tags left\n",
1516 mgp->rdma_tags_available);
1517 }
1518 mgp->down_cnt += stats->link_down;
1519 if (stats->link_down)
1520 wake_up(&mgp->down_wq);
1521 }
1522 }
1523
1524 static int myri10ge_poll(struct napi_struct *napi, int budget)
1525 {
1526 struct myri10ge_slice_state *ss =
1527 container_of(napi, struct myri10ge_slice_state, napi);
1528 int work_done;
1529
1530 #ifdef CONFIG_MYRI10GE_DCA
1531 if (ss->mgp->dca_enabled)
1532 myri10ge_update_dca(ss);
1533 #endif
1534
1535 /* process as many rx events as NAPI will allow */
1536 work_done = myri10ge_clean_rx_done(ss, budget);
1537
1538 if (work_done < budget) {
1539 napi_complete(napi);
1540 put_be32(htonl(3), ss->irq_claim);
1541 }
1542 return work_done;
1543 }
1544
1545 static irqreturn_t myri10ge_intr(int irq, void *arg)
1546 {
1547 struct myri10ge_slice_state *ss = arg;
1548 struct myri10ge_priv *mgp = ss->mgp;
1549 struct mcp_irq_data *stats = ss->fw_stats;
1550 struct myri10ge_tx_buf *tx = &ss->tx;
1551 u32 send_done_count;
1552 int i;
1553
1554 /* an interrupt on a non-zero receive-only slice is implicitly
1555 * valid since MSI-X irqs are not shared */
1556 if ((mgp->dev->real_num_tx_queues == 1) && (ss != mgp->ss)) {
1557 napi_schedule(&ss->napi);
1558 return (IRQ_HANDLED);
1559 }
1560
1561 /* make sure it is our IRQ, and that the DMA has finished */
1562 if (unlikely(!stats->valid))
1563 return (IRQ_NONE);
1564
1565 /* low bit indicates receives are present, so schedule
1566 * napi poll handler */
1567 if (stats->valid & 1)
1568 napi_schedule(&ss->napi);
1569
1570 if (!mgp->msi_enabled && !mgp->msix_enabled) {
1571 put_be32(0, mgp->irq_deassert);
1572 if (!myri10ge_deassert_wait)
1573 stats->valid = 0;
1574 mb();
1575 } else
1576 stats->valid = 0;
1577
1578 /* Wait for IRQ line to go low, if using INTx */
1579 i = 0;
1580 while (1) {
1581 i++;
1582 /* check for transmit completes and receives */
1583 send_done_count = ntohl(stats->send_done_count);
1584 if (send_done_count != tx->pkt_done)
1585 myri10ge_tx_done(ss, (int)send_done_count);
1586 if (unlikely(i > myri10ge_max_irq_loops)) {
1587 netdev_err(mgp->dev, "irq stuck?\n");
1588 stats->valid = 0;
1589 schedule_work(&mgp->watchdog_work);
1590 }
1591 if (likely(stats->valid == 0))
1592 break;
1593 cpu_relax();
1594 barrier();
1595 }
1596
1597 /* Only slice 0 updates stats */
1598 if (ss == mgp->ss)
1599 myri10ge_check_statblock(mgp);
1600
1601 put_be32(htonl(3), ss->irq_claim + 1);
1602 return (IRQ_HANDLED);
1603 }
1604
1605 static int
1606 myri10ge_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
1607 {
1608 struct myri10ge_priv *mgp = netdev_priv(netdev);
1609 char *ptr;
1610 int i;
1611
1612 cmd->autoneg = AUTONEG_DISABLE;
1613 cmd->speed = SPEED_10000;
1614 cmd->duplex = DUPLEX_FULL;
1615
1616 /*
1617 * parse the product code to deterimine the interface type
1618 * (CX4, XFP, Quad Ribbon Fiber) by looking at the character
1619 * after the 3rd dash in the driver's cached copy of the
1620 * EEPROM's product code string.
1621 */
1622 ptr = mgp->product_code_string;
1623 if (ptr == NULL) {
1624 netdev_err(netdev, "Missing product code\n");
1625 return 0;
1626 }
1627 for (i = 0; i < 3; i++, ptr++) {
1628 ptr = strchr(ptr, '-');
1629 if (ptr == NULL) {
1630 netdev_err(netdev, "Invalid product code %s\n",
1631 mgp->product_code_string);
1632 return 0;
1633 }
1634 }
1635 if (*ptr == '2')
1636 ptr++;
1637 if (*ptr == 'R' || *ptr == 'Q' || *ptr == 'S') {
1638 /* We've found either an XFP, quad ribbon fiber, or SFP+ */
1639 cmd->port = PORT_FIBRE;
1640 cmd->supported |= SUPPORTED_FIBRE;
1641 cmd->advertising |= ADVERTISED_FIBRE;
1642 } else {
1643 cmd->port = PORT_OTHER;
1644 }
1645 if (*ptr == 'R' || *ptr == 'S')
1646 cmd->transceiver = XCVR_EXTERNAL;
1647 else
1648 cmd->transceiver = XCVR_INTERNAL;
1649
1650 return 0;
1651 }
1652
1653 static void
1654 myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
1655 {
1656 struct myri10ge_priv *mgp = netdev_priv(netdev);
1657
1658 strlcpy(info->driver, "myri10ge", sizeof(info->driver));
1659 strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version));
1660 strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version));
1661 strlcpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info));
1662 }
1663
1664 static int
1665 myri10ge_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1666 {
1667 struct myri10ge_priv *mgp = netdev_priv(netdev);
1668
1669 coal->rx_coalesce_usecs = mgp->intr_coal_delay;
1670 return 0;
1671 }
1672
1673 static int
1674 myri10ge_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1675 {
1676 struct myri10ge_priv *mgp = netdev_priv(netdev);
1677
1678 mgp->intr_coal_delay = coal->rx_coalesce_usecs;
1679 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1680 return 0;
1681 }
1682
1683 static void
1684 myri10ge_get_pauseparam(struct net_device *netdev,
1685 struct ethtool_pauseparam *pause)
1686 {
1687 struct myri10ge_priv *mgp = netdev_priv(netdev);
1688
1689 pause->autoneg = 0;
1690 pause->rx_pause = mgp->pause;
1691 pause->tx_pause = mgp->pause;
1692 }
1693
1694 static int
1695 myri10ge_set_pauseparam(struct net_device *netdev,
1696 struct ethtool_pauseparam *pause)
1697 {
1698 struct myri10ge_priv *mgp = netdev_priv(netdev);
1699
1700 if (pause->tx_pause != mgp->pause)
1701 return myri10ge_change_pause(mgp, pause->tx_pause);
1702 if (pause->rx_pause != mgp->pause)
1703 return myri10ge_change_pause(mgp, pause->rx_pause);
1704 if (pause->autoneg != 0)
1705 return -EINVAL;
1706 return 0;
1707 }
1708
1709 static void
1710 myri10ge_get_ringparam(struct net_device *netdev,
1711 struct ethtool_ringparam *ring)
1712 {
1713 struct myri10ge_priv *mgp = netdev_priv(netdev);
1714
1715 ring->rx_mini_max_pending = mgp->ss[0].rx_small.mask + 1;
1716 ring->rx_max_pending = mgp->ss[0].rx_big.mask + 1;
1717 ring->rx_jumbo_max_pending = 0;
1718 ring->tx_max_pending = mgp->ss[0].tx.mask + 1;
1719 ring->rx_mini_pending = ring->rx_mini_max_pending;
1720 ring->rx_pending = ring->rx_max_pending;
1721 ring->rx_jumbo_pending = ring->rx_jumbo_max_pending;
1722 ring->tx_pending = ring->tx_max_pending;
1723 }
1724
1725 static u32 myri10ge_get_rx_csum(struct net_device *netdev)
1726 {
1727 struct myri10ge_priv *mgp = netdev_priv(netdev);
1728
1729 if (mgp->csum_flag)
1730 return 1;
1731 else
1732 return 0;
1733 }
1734
1735 static int myri10ge_set_rx_csum(struct net_device *netdev, u32 csum_enabled)
1736 {
1737 struct myri10ge_priv *mgp = netdev_priv(netdev);
1738 int err = 0;
1739
1740 if (csum_enabled)
1741 mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
1742 else {
1743 netdev->features &= ~NETIF_F_LRO;
1744 mgp->csum_flag = 0;
1745
1746 }
1747 return err;
1748 }
1749
1750 static int myri10ge_set_tso(struct net_device *netdev, u32 tso_enabled)
1751 {
1752 struct myri10ge_priv *mgp = netdev_priv(netdev);
1753 unsigned long flags = mgp->features & (NETIF_F_TSO6 | NETIF_F_TSO);
1754
1755 if (tso_enabled)
1756 netdev->features |= flags;
1757 else
1758 netdev->features &= ~flags;
1759 return 0;
1760 }
1761
1762 static const char myri10ge_gstrings_main_stats[][ETH_GSTRING_LEN] = {
1763 "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
1764 "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
1765 "rx_length_errors", "rx_over_errors", "rx_crc_errors",
1766 "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
1767 "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
1768 "tx_heartbeat_errors", "tx_window_errors",
1769 /* device-specific stats */
1770 "tx_boundary", "WC", "irq", "MSI", "MSIX",
1771 "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
1772 "serial_number", "watchdog_resets",
1773 #ifdef CONFIG_MYRI10GE_DCA
1774 "dca_capable_firmware", "dca_device_present",
1775 #endif
1776 "link_changes", "link_up", "dropped_link_overflow",
1777 "dropped_link_error_or_filtered",
1778 "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32",
1779 "dropped_unicast_filtered", "dropped_multicast_filtered",
1780 "dropped_runt", "dropped_overrun", "dropped_no_small_buffer",
1781 "dropped_no_big_buffer"
1782 };
1783
1784 static const char myri10ge_gstrings_slice_stats[][ETH_GSTRING_LEN] = {
1785 "----------- slice ---------",
1786 "tx_pkt_start", "tx_pkt_done", "tx_req", "tx_done",
1787 "rx_small_cnt", "rx_big_cnt",
1788 "wake_queue", "stop_queue", "tx_linearized", "LRO aggregated",
1789 "LRO flushed",
1790 "LRO avg aggr", "LRO no_desc"
1791 };
1792
1793 #define MYRI10GE_NET_STATS_LEN 21
1794 #define MYRI10GE_MAIN_STATS_LEN ARRAY_SIZE(myri10ge_gstrings_main_stats)
1795 #define MYRI10GE_SLICE_STATS_LEN ARRAY_SIZE(myri10ge_gstrings_slice_stats)
1796
1797 static void
1798 myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
1799 {
1800 struct myri10ge_priv *mgp = netdev_priv(netdev);
1801 int i;
1802
1803 switch (stringset) {
1804 case ETH_SS_STATS:
1805 memcpy(data, *myri10ge_gstrings_main_stats,
1806 sizeof(myri10ge_gstrings_main_stats));
1807 data += sizeof(myri10ge_gstrings_main_stats);
1808 for (i = 0; i < mgp->num_slices; i++) {
1809 memcpy(data, *myri10ge_gstrings_slice_stats,
1810 sizeof(myri10ge_gstrings_slice_stats));
1811 data += sizeof(myri10ge_gstrings_slice_stats);
1812 }
1813 break;
1814 }
1815 }
1816
1817 static int myri10ge_get_sset_count(struct net_device *netdev, int sset)
1818 {
1819 struct myri10ge_priv *mgp = netdev_priv(netdev);
1820
1821 switch (sset) {
1822 case ETH_SS_STATS:
1823 return MYRI10GE_MAIN_STATS_LEN +
1824 mgp->num_slices * MYRI10GE_SLICE_STATS_LEN;
1825 default:
1826 return -EOPNOTSUPP;
1827 }
1828 }
1829
1830 static void
1831 myri10ge_get_ethtool_stats(struct net_device *netdev,
1832 struct ethtool_stats *stats, u64 * data)
1833 {
1834 struct myri10ge_priv *mgp = netdev_priv(netdev);
1835 struct myri10ge_slice_state *ss;
1836 int slice;
1837 int i;
1838
1839 /* force stats update */
1840 (void)myri10ge_get_stats(netdev);
1841 for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++)
1842 data[i] = ((unsigned long *)&netdev->stats)[i];
1843
1844 data[i++] = (unsigned int)mgp->tx_boundary;
1845 data[i++] = (unsigned int)mgp->wc_enabled;
1846 data[i++] = (unsigned int)mgp->pdev->irq;
1847 data[i++] = (unsigned int)mgp->msi_enabled;
1848 data[i++] = (unsigned int)mgp->msix_enabled;
1849 data[i++] = (unsigned int)mgp->read_dma;
1850 data[i++] = (unsigned int)mgp->write_dma;
1851 data[i++] = (unsigned int)mgp->read_write_dma;
1852 data[i++] = (unsigned int)mgp->serial_number;
1853 data[i++] = (unsigned int)mgp->watchdog_resets;
1854 #ifdef CONFIG_MYRI10GE_DCA
1855 data[i++] = (unsigned int)(mgp->ss[0].dca_tag != NULL);
1856 data[i++] = (unsigned int)(mgp->dca_enabled);
1857 #endif
1858 data[i++] = (unsigned int)mgp->link_changes;
1859
1860 /* firmware stats are useful only in the first slice */
1861 ss = &mgp->ss[0];
1862 data[i++] = (unsigned int)ntohl(ss->fw_stats->link_up);
1863 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_link_overflow);
1864 data[i++] =
1865 (unsigned int)ntohl(ss->fw_stats->dropped_link_error_or_filtered);
1866 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_pause);
1867 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_phy);
1868 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_crc32);
1869 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_unicast_filtered);
1870 data[i++] =
1871 (unsigned int)ntohl(ss->fw_stats->dropped_multicast_filtered);
1872 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_runt);
1873 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_overrun);
1874 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_small_buffer);
1875 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_big_buffer);
1876
1877 for (slice = 0; slice < mgp->num_slices; slice++) {
1878 ss = &mgp->ss[slice];
1879 data[i++] = slice;
1880 data[i++] = (unsigned int)ss->tx.pkt_start;
1881 data[i++] = (unsigned int)ss->tx.pkt_done;
1882 data[i++] = (unsigned int)ss->tx.req;
1883 data[i++] = (unsigned int)ss->tx.done;
1884 data[i++] = (unsigned int)ss->rx_small.cnt;
1885 data[i++] = (unsigned int)ss->rx_big.cnt;
1886 data[i++] = (unsigned int)ss->tx.wake_queue;
1887 data[i++] = (unsigned int)ss->tx.stop_queue;
1888 data[i++] = (unsigned int)ss->tx.linearized;
1889 data[i++] = ss->rx_done.lro_mgr.stats.aggregated;
1890 data[i++] = ss->rx_done.lro_mgr.stats.flushed;
1891 if (ss->rx_done.lro_mgr.stats.flushed)
1892 data[i++] = ss->rx_done.lro_mgr.stats.aggregated /
1893 ss->rx_done.lro_mgr.stats.flushed;
1894 else
1895 data[i++] = 0;
1896 data[i++] = ss->rx_done.lro_mgr.stats.no_desc;
1897 }
1898 }
1899
1900 static void myri10ge_set_msglevel(struct net_device *netdev, u32 value)
1901 {
1902 struct myri10ge_priv *mgp = netdev_priv(netdev);
1903 mgp->msg_enable = value;
1904 }
1905
1906 static u32 myri10ge_get_msglevel(struct net_device *netdev)
1907 {
1908 struct myri10ge_priv *mgp = netdev_priv(netdev);
1909 return mgp->msg_enable;
1910 }
1911
1912 static int myri10ge_set_flags(struct net_device *netdev, u32 value)
1913 {
1914 return ethtool_op_set_flags(netdev, value, ETH_FLAG_LRO);
1915 }
1916
1917 static const struct ethtool_ops myri10ge_ethtool_ops = {
1918 .get_settings = myri10ge_get_settings,
1919 .get_drvinfo = myri10ge_get_drvinfo,
1920 .get_coalesce = myri10ge_get_coalesce,
1921 .set_coalesce = myri10ge_set_coalesce,
1922 .get_pauseparam = myri10ge_get_pauseparam,
1923 .set_pauseparam = myri10ge_set_pauseparam,
1924 .get_ringparam = myri10ge_get_ringparam,
1925 .get_rx_csum = myri10ge_get_rx_csum,
1926 .set_rx_csum = myri10ge_set_rx_csum,
1927 .set_tx_csum = ethtool_op_set_tx_hw_csum,
1928 .set_sg = ethtool_op_set_sg,
1929 .set_tso = myri10ge_set_tso,
1930 .get_link = ethtool_op_get_link,
1931 .get_strings = myri10ge_get_strings,
1932 .get_sset_count = myri10ge_get_sset_count,
1933 .get_ethtool_stats = myri10ge_get_ethtool_stats,
1934 .set_msglevel = myri10ge_set_msglevel,
1935 .get_msglevel = myri10ge_get_msglevel,
1936 .get_flags = ethtool_op_get_flags,
1937 .set_flags = myri10ge_set_flags
1938 };
1939
1940 static int myri10ge_allocate_rings(struct myri10ge_slice_state *ss)
1941 {
1942 struct myri10ge_priv *mgp = ss->mgp;
1943 struct myri10ge_cmd cmd;
1944 struct net_device *dev = mgp->dev;
1945 int tx_ring_size, rx_ring_size;
1946 int tx_ring_entries, rx_ring_entries;
1947 int i, slice, status;
1948 size_t bytes;
1949
1950 /* get ring sizes */
1951 slice = ss - mgp->ss;
1952 cmd.data0 = slice;
1953 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0);
1954 tx_ring_size = cmd.data0;
1955 cmd.data0 = slice;
1956 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
1957 if (status != 0)
1958 return status;
1959 rx_ring_size = cmd.data0;
1960
1961 tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send);
1962 rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr);
1963 ss->tx.mask = tx_ring_entries - 1;
1964 ss->rx_small.mask = ss->rx_big.mask = rx_ring_entries - 1;
1965
1966 status = -ENOMEM;
1967
1968 /* allocate the host shadow rings */
1969
1970 bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4)
1971 * sizeof(*ss->tx.req_list);
1972 ss->tx.req_bytes = kzalloc(bytes, GFP_KERNEL);
1973 if (ss->tx.req_bytes == NULL)
1974 goto abort_with_nothing;
1975
1976 /* ensure req_list entries are aligned to 8 bytes */
1977 ss->tx.req_list = (struct mcp_kreq_ether_send *)
1978 ALIGN((unsigned long)ss->tx.req_bytes, 8);
1979 ss->tx.queue_active = 0;
1980
1981 bytes = rx_ring_entries * sizeof(*ss->rx_small.shadow);
1982 ss->rx_small.shadow = kzalloc(bytes, GFP_KERNEL);
1983 if (ss->rx_small.shadow == NULL)
1984 goto abort_with_tx_req_bytes;
1985
1986 bytes = rx_ring_entries * sizeof(*ss->rx_big.shadow);
1987 ss->rx_big.shadow = kzalloc(bytes, GFP_KERNEL);
1988 if (ss->rx_big.shadow == NULL)
1989 goto abort_with_rx_small_shadow;
1990
1991 /* allocate the host info rings */
1992
1993 bytes = tx_ring_entries * sizeof(*ss->tx.info);
1994 ss->tx.info = kzalloc(bytes, GFP_KERNEL);
1995 if (ss->tx.info == NULL)
1996 goto abort_with_rx_big_shadow;
1997
1998 bytes = rx_ring_entries * sizeof(*ss->rx_small.info);
1999 ss->rx_small.info = kzalloc(bytes, GFP_KERNEL);
2000 if (ss->rx_small.info == NULL)
2001 goto abort_with_tx_info;
2002
2003 bytes = rx_ring_entries * sizeof(*ss->rx_big.info);
2004 ss->rx_big.info = kzalloc(bytes, GFP_KERNEL);
2005 if (ss->rx_big.info == NULL)
2006 goto abort_with_rx_small_info;
2007
2008 /* Fill the receive rings */
2009 ss->rx_big.cnt = 0;
2010 ss->rx_small.cnt = 0;
2011 ss->rx_big.fill_cnt = 0;
2012 ss->rx_small.fill_cnt = 0;
2013 ss->rx_small.page_offset = MYRI10GE_ALLOC_SIZE;
2014 ss->rx_big.page_offset = MYRI10GE_ALLOC_SIZE;
2015 ss->rx_small.watchdog_needed = 0;
2016 ss->rx_big.watchdog_needed = 0;
2017 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
2018 mgp->small_bytes + MXGEFW_PAD, 0);
2019
2020 if (ss->rx_small.fill_cnt < ss->rx_small.mask + 1) {
2021 netdev_err(dev, "slice-%d: alloced only %d small bufs\n",
2022 slice, ss->rx_small.fill_cnt);
2023 goto abort_with_rx_small_ring;
2024 }
2025
2026 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
2027 if (ss->rx_big.fill_cnt < ss->rx_big.mask + 1) {
2028 netdev_err(dev, "slice-%d: alloced only %d big bufs\n",
2029 slice, ss->rx_big.fill_cnt);
2030 goto abort_with_rx_big_ring;
2031 }
2032
2033 return 0;
2034
2035 abort_with_rx_big_ring:
2036 for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2037 int idx = i & ss->rx_big.mask;
2038 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2039 mgp->big_bytes);
2040 put_page(ss->rx_big.info[idx].page);
2041 }
2042
2043 abort_with_rx_small_ring:
2044 for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2045 int idx = i & ss->rx_small.mask;
2046 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2047 mgp->small_bytes + MXGEFW_PAD);
2048 put_page(ss->rx_small.info[idx].page);
2049 }
2050
2051 kfree(ss->rx_big.info);
2052
2053 abort_with_rx_small_info:
2054 kfree(ss->rx_small.info);
2055
2056 abort_with_tx_info:
2057 kfree(ss->tx.info);
2058
2059 abort_with_rx_big_shadow:
2060 kfree(ss->rx_big.shadow);
2061
2062 abort_with_rx_small_shadow:
2063 kfree(ss->rx_small.shadow);
2064
2065 abort_with_tx_req_bytes:
2066 kfree(ss->tx.req_bytes);
2067 ss->tx.req_bytes = NULL;
2068 ss->tx.req_list = NULL;
2069
2070 abort_with_nothing:
2071 return status;
2072 }
2073
2074 static void myri10ge_free_rings(struct myri10ge_slice_state *ss)
2075 {
2076 struct myri10ge_priv *mgp = ss->mgp;
2077 struct sk_buff *skb;
2078 struct myri10ge_tx_buf *tx;
2079 int i, len, idx;
2080
2081 /* If not allocated, skip it */
2082 if (ss->tx.req_list == NULL)
2083 return;
2084
2085 for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2086 idx = i & ss->rx_big.mask;
2087 if (i == ss->rx_big.fill_cnt - 1)
2088 ss->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE;
2089 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2090 mgp->big_bytes);
2091 put_page(ss->rx_big.info[idx].page);
2092 }
2093
2094 for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2095 idx = i & ss->rx_small.mask;
2096 if (i == ss->rx_small.fill_cnt - 1)
2097 ss->rx_small.info[idx].page_offset =
2098 MYRI10GE_ALLOC_SIZE;
2099 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2100 mgp->small_bytes + MXGEFW_PAD);
2101 put_page(ss->rx_small.info[idx].page);
2102 }
2103 tx = &ss->tx;
2104 while (tx->done != tx->req) {
2105 idx = tx->done & tx->mask;
2106 skb = tx->info[idx].skb;
2107
2108 /* Mark as free */
2109 tx->info[idx].skb = NULL;
2110 tx->done++;
2111 len = dma_unmap_len(&tx->info[idx], len);
2112 dma_unmap_len_set(&tx->info[idx], len, 0);
2113 if (skb) {
2114 ss->stats.tx_dropped++;
2115 dev_kfree_skb_any(skb);
2116 if (len)
2117 pci_unmap_single(mgp->pdev,
2118 dma_unmap_addr(&tx->info[idx],
2119 bus), len,
2120 PCI_DMA_TODEVICE);
2121 } else {
2122 if (len)
2123 pci_unmap_page(mgp->pdev,
2124 dma_unmap_addr(&tx->info[idx],
2125 bus), len,
2126 PCI_DMA_TODEVICE);
2127 }
2128 }
2129 kfree(ss->rx_big.info);
2130
2131 kfree(ss->rx_small.info);
2132
2133 kfree(ss->tx.info);
2134
2135 kfree(ss->rx_big.shadow);
2136
2137 kfree(ss->rx_small.shadow);
2138
2139 kfree(ss->tx.req_bytes);
2140 ss->tx.req_bytes = NULL;
2141 ss->tx.req_list = NULL;
2142 }
2143
2144 static int myri10ge_request_irq(struct myri10ge_priv *mgp)
2145 {
2146 struct pci_dev *pdev = mgp->pdev;
2147 struct myri10ge_slice_state *ss;
2148 struct net_device *netdev = mgp->dev;
2149 int i;
2150 int status;
2151
2152 mgp->msi_enabled = 0;
2153 mgp->msix_enabled = 0;
2154 status = 0;
2155 if (myri10ge_msi) {
2156 if (mgp->num_slices > 1) {
2157 status =
2158 pci_enable_msix(pdev, mgp->msix_vectors,
2159 mgp->num_slices);
2160 if (status == 0) {
2161 mgp->msix_enabled = 1;
2162 } else {
2163 dev_err(&pdev->dev,
2164 "Error %d setting up MSI-X\n", status);
2165 return status;
2166 }
2167 }
2168 if (mgp->msix_enabled == 0) {
2169 status = pci_enable_msi(pdev);
2170 if (status != 0) {
2171 dev_err(&pdev->dev,
2172 "Error %d setting up MSI; falling back to xPIC\n",
2173 status);
2174 } else {
2175 mgp->msi_enabled = 1;
2176 }
2177 }
2178 }
2179 if (mgp->msix_enabled) {
2180 for (i = 0; i < mgp->num_slices; i++) {
2181 ss = &mgp->ss[i];
2182 snprintf(ss->irq_desc, sizeof(ss->irq_desc),
2183 "%s:slice-%d", netdev->name, i);
2184 status = request_irq(mgp->msix_vectors[i].vector,
2185 myri10ge_intr, 0, ss->irq_desc,
2186 ss);
2187 if (status != 0) {
2188 dev_err(&pdev->dev,
2189 "slice %d failed to allocate IRQ\n", i);
2190 i--;
2191 while (i >= 0) {
2192 free_irq(mgp->msix_vectors[i].vector,
2193 &mgp->ss[i]);
2194 i--;
2195 }
2196 pci_disable_msix(pdev);
2197 return status;
2198 }
2199 }
2200 } else {
2201 status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED,
2202 mgp->dev->name, &mgp->ss[0]);
2203 if (status != 0) {
2204 dev_err(&pdev->dev, "failed to allocate IRQ\n");
2205 if (mgp->msi_enabled)
2206 pci_disable_msi(pdev);
2207 }
2208 }
2209 return status;
2210 }
2211
2212 static void myri10ge_free_irq(struct myri10ge_priv *mgp)
2213 {
2214 struct pci_dev *pdev = mgp->pdev;
2215 int i;
2216
2217 if (mgp->msix_enabled) {
2218 for (i = 0; i < mgp->num_slices; i++)
2219 free_irq(mgp->msix_vectors[i].vector, &mgp->ss[i]);
2220 } else {
2221 free_irq(pdev->irq, &mgp->ss[0]);
2222 }
2223 if (mgp->msi_enabled)
2224 pci_disable_msi(pdev);
2225 if (mgp->msix_enabled)
2226 pci_disable_msix(pdev);
2227 }
2228
2229 static int
2230 myri10ge_get_frag_header(struct skb_frag_struct *frag, void **mac_hdr,
2231 void **ip_hdr, void **tcpudp_hdr,
2232 u64 * hdr_flags, void *priv)
2233 {
2234 struct ethhdr *eh;
2235 struct vlan_ethhdr *veh;
2236 struct iphdr *iph;
2237 u8 *va = page_address(frag->page) + frag->page_offset;
2238 unsigned long ll_hlen;
2239 /* passed opaque through lro_receive_frags() */
2240 __wsum csum = (__force __wsum) (unsigned long)priv;
2241
2242 /* find the mac header, aborting if not IPv4 */
2243
2244 eh = (struct ethhdr *)va;
2245 *mac_hdr = eh;
2246 ll_hlen = ETH_HLEN;
2247 if (eh->h_proto != htons(ETH_P_IP)) {
2248 if (eh->h_proto == htons(ETH_P_8021Q)) {
2249 veh = (struct vlan_ethhdr *)va;
2250 if (veh->h_vlan_encapsulated_proto != htons(ETH_P_IP))
2251 return -1;
2252
2253 ll_hlen += VLAN_HLEN;
2254
2255 /*
2256 * HW checksum starts ETH_HLEN bytes into
2257 * frame, so we must subtract off the VLAN
2258 * header's checksum before csum can be used
2259 */
2260 csum = csum_sub(csum, csum_partial(va + ETH_HLEN,
2261 VLAN_HLEN, 0));
2262 } else {
2263 return -1;
2264 }
2265 }
2266 *hdr_flags = LRO_IPV4;
2267
2268 iph = (struct iphdr *)(va + ll_hlen);
2269 *ip_hdr = iph;
2270 if (iph->protocol != IPPROTO_TCP)
2271 return -1;
2272 if (iph->frag_off & htons(IP_MF | IP_OFFSET))
2273 return -1;
2274 *hdr_flags |= LRO_TCP;
2275 *tcpudp_hdr = (u8 *) (*ip_hdr) + (iph->ihl << 2);
2276
2277 /* verify the IP checksum */
2278 if (unlikely(ip_fast_csum((u8 *) iph, iph->ihl)))
2279 return -1;
2280
2281 /* verify the checksum */
2282 if (unlikely(csum_tcpudp_magic(iph->saddr, iph->daddr,
2283 ntohs(iph->tot_len) - (iph->ihl << 2),
2284 IPPROTO_TCP, csum)))
2285 return -1;
2286
2287 return 0;
2288 }
2289
2290 static int myri10ge_get_txrx(struct myri10ge_priv *mgp, int slice)
2291 {
2292 struct myri10ge_cmd cmd;
2293 struct myri10ge_slice_state *ss;
2294 int status;
2295
2296 ss = &mgp->ss[slice];
2297 status = 0;
2298 if (slice == 0 || (mgp->dev->real_num_tx_queues > 1)) {
2299 cmd.data0 = slice;
2300 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET,
2301 &cmd, 0);
2302 ss->tx.lanai = (struct mcp_kreq_ether_send __iomem *)
2303 (mgp->sram + cmd.data0);
2304 }
2305 cmd.data0 = slice;
2306 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET,
2307 &cmd, 0);
2308 ss->rx_small.lanai = (struct mcp_kreq_ether_recv __iomem *)
2309 (mgp->sram + cmd.data0);
2310
2311 cmd.data0 = slice;
2312 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0);
2313 ss->rx_big.lanai = (struct mcp_kreq_ether_recv __iomem *)
2314 (mgp->sram + cmd.data0);
2315
2316 ss->tx.send_go = (__iomem __be32 *)
2317 (mgp->sram + MXGEFW_ETH_SEND_GO + 64 * slice);
2318 ss->tx.send_stop = (__iomem __be32 *)
2319 (mgp->sram + MXGEFW_ETH_SEND_STOP + 64 * slice);
2320 return status;
2321
2322 }
2323
2324 static int myri10ge_set_stats(struct myri10ge_priv *mgp, int slice)
2325 {
2326 struct myri10ge_cmd cmd;
2327 struct myri10ge_slice_state *ss;
2328 int status;
2329
2330 ss = &mgp->ss[slice];
2331 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->fw_stats_bus);
2332 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->fw_stats_bus);
2333 cmd.data2 = sizeof(struct mcp_irq_data) | (slice << 16);
2334 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0);
2335 if (status == -ENOSYS) {
2336 dma_addr_t bus = ss->fw_stats_bus;
2337 if (slice != 0)
2338 return -EINVAL;
2339 bus += offsetof(struct mcp_irq_data, send_done_count);
2340 cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus);
2341 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus);
2342 status = myri10ge_send_cmd(mgp,
2343 MXGEFW_CMD_SET_STATS_DMA_OBSOLETE,
2344 &cmd, 0);
2345 /* Firmware cannot support multicast without STATS_DMA_V2 */
2346 mgp->fw_multicast_support = 0;
2347 } else {
2348 mgp->fw_multicast_support = 1;
2349 }
2350 return 0;
2351 }
2352
2353 static int myri10ge_open(struct net_device *dev)
2354 {
2355 struct myri10ge_slice_state *ss;
2356 struct myri10ge_priv *mgp = netdev_priv(dev);
2357 struct myri10ge_cmd cmd;
2358 int i, status, big_pow2, slice;
2359 u8 *itable;
2360 struct net_lro_mgr *lro_mgr;
2361
2362 if (mgp->running != MYRI10GE_ETH_STOPPED)
2363 return -EBUSY;
2364
2365 mgp->running = MYRI10GE_ETH_STARTING;
2366 status = myri10ge_reset(mgp);
2367 if (status != 0) {
2368 netdev_err(dev, "failed reset\n");
2369 goto abort_with_nothing;
2370 }
2371
2372 if (mgp->num_slices > 1) {
2373 cmd.data0 = mgp->num_slices;
2374 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
2375 if (mgp->dev->real_num_tx_queues > 1)
2376 cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
2377 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
2378 &cmd, 0);
2379 if (status != 0) {
2380 netdev_err(dev, "failed to set number of slices\n");
2381 goto abort_with_nothing;
2382 }
2383 /* setup the indirection table */
2384 cmd.data0 = mgp->num_slices;
2385 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_TABLE_SIZE,
2386 &cmd, 0);
2387
2388 status |= myri10ge_send_cmd(mgp,
2389 MXGEFW_CMD_GET_RSS_TABLE_OFFSET,
2390 &cmd, 0);
2391 if (status != 0) {
2392 netdev_err(dev, "failed to setup rss tables\n");
2393 goto abort_with_nothing;
2394 }
2395
2396 /* just enable an identity mapping */
2397 itable = mgp->sram + cmd.data0;
2398 for (i = 0; i < mgp->num_slices; i++)
2399 __raw_writeb(i, &itable[i]);
2400
2401 cmd.data0 = 1;
2402 cmd.data1 = myri10ge_rss_hash;
2403 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_ENABLE,
2404 &cmd, 0);
2405 if (status != 0) {
2406 netdev_err(dev, "failed to enable slices\n");
2407 goto abort_with_nothing;
2408 }
2409 }
2410
2411 status = myri10ge_request_irq(mgp);
2412 if (status != 0)
2413 goto abort_with_nothing;
2414
2415 /* decide what small buffer size to use. For good TCP rx
2416 * performance, it is important to not receive 1514 byte
2417 * frames into jumbo buffers, as it confuses the socket buffer
2418 * accounting code, leading to drops and erratic performance.
2419 */
2420
2421 if (dev->mtu <= ETH_DATA_LEN)
2422 /* enough for a TCP header */
2423 mgp->small_bytes = (128 > SMP_CACHE_BYTES)
2424 ? (128 - MXGEFW_PAD)
2425 : (SMP_CACHE_BYTES - MXGEFW_PAD);
2426 else
2427 /* enough for a vlan encapsulated ETH_DATA_LEN frame */
2428 mgp->small_bytes = VLAN_ETH_FRAME_LEN;
2429
2430 /* Override the small buffer size? */
2431 if (myri10ge_small_bytes > 0)
2432 mgp->small_bytes = myri10ge_small_bytes;
2433
2434 /* Firmware needs the big buff size as a power of 2. Lie and
2435 * tell him the buffer is larger, because we only use 1
2436 * buffer/pkt, and the mtu will prevent overruns.
2437 */
2438 big_pow2 = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2439 if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) {
2440 while (!is_power_of_2(big_pow2))
2441 big_pow2++;
2442 mgp->big_bytes = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2443 } else {
2444 big_pow2 = MYRI10GE_ALLOC_SIZE;
2445 mgp->big_bytes = big_pow2;
2446 }
2447
2448 /* setup the per-slice data structures */
2449 for (slice = 0; slice < mgp->num_slices; slice++) {
2450 ss = &mgp->ss[slice];
2451
2452 status = myri10ge_get_txrx(mgp, slice);
2453 if (status != 0) {
2454 netdev_err(dev, "failed to get ring sizes or locations\n");
2455 goto abort_with_rings;
2456 }
2457 status = myri10ge_allocate_rings(ss);
2458 if (status != 0)
2459 goto abort_with_rings;
2460
2461 /* only firmware which supports multiple TX queues
2462 * supports setting up the tx stats on non-zero
2463 * slices */
2464 if (slice == 0 || mgp->dev->real_num_tx_queues > 1)
2465 status = myri10ge_set_stats(mgp, slice);
2466 if (status) {
2467 netdev_err(dev, "Couldn't set stats DMA\n");
2468 goto abort_with_rings;
2469 }
2470
2471 lro_mgr = &ss->rx_done.lro_mgr;
2472 lro_mgr->dev = dev;
2473 lro_mgr->features = LRO_F_NAPI;
2474 lro_mgr->ip_summed = CHECKSUM_COMPLETE;
2475 lro_mgr->ip_summed_aggr = CHECKSUM_UNNECESSARY;
2476 lro_mgr->max_desc = MYRI10GE_MAX_LRO_DESCRIPTORS;
2477 lro_mgr->lro_arr = ss->rx_done.lro_desc;
2478 lro_mgr->get_frag_header = myri10ge_get_frag_header;
2479 lro_mgr->max_aggr = myri10ge_lro_max_pkts;
2480 lro_mgr->frag_align_pad = 2;
2481 if (lro_mgr->max_aggr > MAX_SKB_FRAGS)
2482 lro_mgr->max_aggr = MAX_SKB_FRAGS;
2483
2484 /* must happen prior to any irq */
2485 napi_enable(&(ss)->napi);
2486 }
2487
2488 /* now give firmware buffers sizes, and MTU */
2489 cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
2490 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0);
2491 cmd.data0 = mgp->small_bytes;
2492 status |=
2493 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0);
2494 cmd.data0 = big_pow2;
2495 status |=
2496 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0);
2497 if (status) {
2498 netdev_err(dev, "Couldn't set buffer sizes\n");
2499 goto abort_with_rings;
2500 }
2501
2502 /*
2503 * Set Linux style TSO mode; this is needed only on newer
2504 * firmware versions. Older versions default to Linux
2505 * style TSO
2506 */
2507 cmd.data0 = 0;
2508 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_TSO_MODE, &cmd, 0);
2509 if (status && status != -ENOSYS) {
2510 netdev_err(dev, "Couldn't set TSO mode\n");
2511 goto abort_with_rings;
2512 }
2513
2514 mgp->link_state = ~0U;
2515 mgp->rdma_tags_available = 15;
2516
2517 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0);
2518 if (status) {
2519 netdev_err(dev, "Couldn't bring up link\n");
2520 goto abort_with_rings;
2521 }
2522
2523 mgp->running = MYRI10GE_ETH_RUNNING;
2524 mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ;
2525 add_timer(&mgp->watchdog_timer);
2526 netif_tx_wake_all_queues(dev);
2527
2528 return 0;
2529
2530 abort_with_rings:
2531 while (slice) {
2532 slice--;
2533 napi_disable(&mgp->ss[slice].napi);
2534 }
2535 for (i = 0; i < mgp->num_slices; i++)
2536 myri10ge_free_rings(&mgp->ss[i]);
2537
2538 myri10ge_free_irq(mgp);
2539
2540 abort_with_nothing:
2541 mgp->running = MYRI10GE_ETH_STOPPED;
2542 return -ENOMEM;
2543 }
2544
2545 static int myri10ge_close(struct net_device *dev)
2546 {
2547 struct myri10ge_priv *mgp = netdev_priv(dev);
2548 struct myri10ge_cmd cmd;
2549 int status, old_down_cnt;
2550 int i;
2551
2552 if (mgp->running != MYRI10GE_ETH_RUNNING)
2553 return 0;
2554
2555 if (mgp->ss[0].tx.req_bytes == NULL)
2556 return 0;
2557
2558 del_timer_sync(&mgp->watchdog_timer);
2559 mgp->running = MYRI10GE_ETH_STOPPING;
2560 for (i = 0; i < mgp->num_slices; i++) {
2561 napi_disable(&mgp->ss[i].napi);
2562 }
2563 netif_carrier_off(dev);
2564
2565 netif_tx_stop_all_queues(dev);
2566 if (mgp->rebooted == 0) {
2567 old_down_cnt = mgp->down_cnt;
2568 mb();
2569 status =
2570 myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0);
2571 if (status)
2572 netdev_err(dev, "Couldn't bring down link\n");
2573
2574 wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt,
2575 HZ);
2576 if (old_down_cnt == mgp->down_cnt)
2577 netdev_err(dev, "never got down irq\n");
2578 }
2579 netif_tx_disable(dev);
2580 myri10ge_free_irq(mgp);
2581 for (i = 0; i < mgp->num_slices; i++)
2582 myri10ge_free_rings(&mgp->ss[i]);
2583
2584 mgp->running = MYRI10GE_ETH_STOPPED;
2585 return 0;
2586 }
2587
2588 /* copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
2589 * backwards one at a time and handle ring wraps */
2590
2591 static inline void
2592 myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx,
2593 struct mcp_kreq_ether_send *src, int cnt)
2594 {
2595 int idx, starting_slot;
2596 starting_slot = tx->req;
2597 while (cnt > 1) {
2598 cnt--;
2599 idx = (starting_slot + cnt) & tx->mask;
2600 myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src));
2601 mb();
2602 }
2603 }
2604
2605 /*
2606 * copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
2607 * at most 32 bytes at a time, so as to avoid involving the software
2608 * pio handler in the nic. We re-write the first segment's flags
2609 * to mark them valid only after writing the entire chain.
2610 */
2611
2612 static inline void
2613 myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src,
2614 int cnt)
2615 {
2616 int idx, i;
2617 struct mcp_kreq_ether_send __iomem *dstp, *dst;
2618 struct mcp_kreq_ether_send *srcp;
2619 u8 last_flags;
2620
2621 idx = tx->req & tx->mask;
2622
2623 last_flags = src->flags;
2624 src->flags = 0;
2625 mb();
2626 dst = dstp = &tx->lanai[idx];
2627 srcp = src;
2628
2629 if ((idx + cnt) < tx->mask) {
2630 for (i = 0; i < (cnt - 1); i += 2) {
2631 myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src));
2632 mb(); /* force write every 32 bytes */
2633 srcp += 2;
2634 dstp += 2;
2635 }
2636 } else {
2637 /* submit all but the first request, and ensure
2638 * that it is submitted below */
2639 myri10ge_submit_req_backwards(tx, src, cnt);
2640 i = 0;
2641 }
2642 if (i < cnt) {
2643 /* submit the first request */
2644 myri10ge_pio_copy(dstp, srcp, sizeof(*src));
2645 mb(); /* barrier before setting valid flag */
2646 }
2647
2648 /* re-write the last 32-bits with the valid flags */
2649 src->flags = last_flags;
2650 put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3);
2651 tx->req += cnt;
2652 mb();
2653 }
2654
2655 /*
2656 * Transmit a packet. We need to split the packet so that a single
2657 * segment does not cross myri10ge->tx_boundary, so this makes segment
2658 * counting tricky. So rather than try to count segments up front, we
2659 * just give up if there are too few segments to hold a reasonably
2660 * fragmented packet currently available. If we run
2661 * out of segments while preparing a packet for DMA, we just linearize
2662 * it and try again.
2663 */
2664
2665 static netdev_tx_t myri10ge_xmit(struct sk_buff *skb,
2666 struct net_device *dev)
2667 {
2668 struct myri10ge_priv *mgp = netdev_priv(dev);
2669 struct myri10ge_slice_state *ss;
2670 struct mcp_kreq_ether_send *req;
2671 struct myri10ge_tx_buf *tx;
2672 struct skb_frag_struct *frag;
2673 struct netdev_queue *netdev_queue;
2674 dma_addr_t bus;
2675 u32 low;
2676 __be32 high_swapped;
2677 unsigned int len;
2678 int idx, last_idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
2679 u16 pseudo_hdr_offset, cksum_offset, queue;
2680 int cum_len, seglen, boundary, rdma_count;
2681 u8 flags, odd_flag;
2682
2683 queue = skb_get_queue_mapping(skb);
2684 ss = &mgp->ss[queue];
2685 netdev_queue = netdev_get_tx_queue(mgp->dev, queue);
2686 tx = &ss->tx;
2687
2688 again:
2689 req = tx->req_list;
2690 avail = tx->mask - 1 - (tx->req - tx->done);
2691
2692 mss = 0;
2693 max_segments = MXGEFW_MAX_SEND_DESC;
2694
2695 if (skb_is_gso(skb)) {
2696 mss = skb_shinfo(skb)->gso_size;
2697 max_segments = MYRI10GE_MAX_SEND_DESC_TSO;
2698 }
2699
2700 if ((unlikely(avail < max_segments))) {
2701 /* we are out of transmit resources */
2702 tx->stop_queue++;
2703 netif_tx_stop_queue(netdev_queue);
2704 return NETDEV_TX_BUSY;
2705 }
2706
2707 /* Setup checksum offloading, if needed */
2708 cksum_offset = 0;
2709 pseudo_hdr_offset = 0;
2710 odd_flag = 0;
2711 flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
2712 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2713 cksum_offset = skb_transport_offset(skb);
2714 pseudo_hdr_offset = cksum_offset + skb->csum_offset;
2715 /* If the headers are excessively large, then we must
2716 * fall back to a software checksum */
2717 if (unlikely(!mss && (cksum_offset > 255 ||
2718 pseudo_hdr_offset > 127))) {
2719 if (skb_checksum_help(skb))
2720 goto drop;
2721 cksum_offset = 0;
2722 pseudo_hdr_offset = 0;
2723 } else {
2724 odd_flag = MXGEFW_FLAGS_ALIGN_ODD;
2725 flags |= MXGEFW_FLAGS_CKSUM;
2726 }
2727 }
2728
2729 cum_len = 0;
2730
2731 if (mss) { /* TSO */
2732 /* this removes any CKSUM flag from before */
2733 flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST);
2734
2735 /* negative cum_len signifies to the
2736 * send loop that we are still in the
2737 * header portion of the TSO packet.
2738 * TSO header can be at most 1KB long */
2739 cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb));
2740
2741 /* for IPv6 TSO, the checksum offset stores the
2742 * TCP header length, to save the firmware from
2743 * the need to parse the headers */
2744 if (skb_is_gso_v6(skb)) {
2745 cksum_offset = tcp_hdrlen(skb);
2746 /* Can only handle headers <= max_tso6 long */
2747 if (unlikely(-cum_len > mgp->max_tso6))
2748 return myri10ge_sw_tso(skb, dev);
2749 }
2750 /* for TSO, pseudo_hdr_offset holds mss.
2751 * The firmware figures out where to put
2752 * the checksum by parsing the header. */
2753 pseudo_hdr_offset = mss;
2754 } else
2755 /* Mark small packets, and pad out tiny packets */
2756 if (skb->len <= MXGEFW_SEND_SMALL_SIZE) {
2757 flags |= MXGEFW_FLAGS_SMALL;
2758
2759 /* pad frames to at least ETH_ZLEN bytes */
2760 if (unlikely(skb->len < ETH_ZLEN)) {
2761 if (skb_padto(skb, ETH_ZLEN)) {
2762 /* The packet is gone, so we must
2763 * return 0 */
2764 ss->stats.tx_dropped += 1;
2765 return NETDEV_TX_OK;
2766 }
2767 /* adjust the len to account for the zero pad
2768 * so that the nic can know how long it is */
2769 skb->len = ETH_ZLEN;
2770 }
2771 }
2772
2773 /* map the skb for DMA */
2774 len = skb_headlen(skb);
2775 idx = tx->req & tx->mask;
2776 tx->info[idx].skb = skb;
2777 bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE);
2778 dma_unmap_addr_set(&tx->info[idx], bus, bus);
2779 dma_unmap_len_set(&tx->info[idx], len, len);
2780
2781 frag_cnt = skb_shinfo(skb)->nr_frags;
2782 frag_idx = 0;
2783 count = 0;
2784 rdma_count = 0;
2785
2786 /* "rdma_count" is the number of RDMAs belonging to the
2787 * current packet BEFORE the current send request. For
2788 * non-TSO packets, this is equal to "count".
2789 * For TSO packets, rdma_count needs to be reset
2790 * to 0 after a segment cut.
2791 *
2792 * The rdma_count field of the send request is
2793 * the number of RDMAs of the packet starting at
2794 * that request. For TSO send requests with one ore more cuts
2795 * in the middle, this is the number of RDMAs starting
2796 * after the last cut in the request. All previous
2797 * segments before the last cut implicitly have 1 RDMA.
2798 *
2799 * Since the number of RDMAs is not known beforehand,
2800 * it must be filled-in retroactively - after each
2801 * segmentation cut or at the end of the entire packet.
2802 */
2803
2804 while (1) {
2805 /* Break the SKB or Fragment up into pieces which
2806 * do not cross mgp->tx_boundary */
2807 low = MYRI10GE_LOWPART_TO_U32(bus);
2808 high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
2809 while (len) {
2810 u8 flags_next;
2811 int cum_len_next;
2812
2813 if (unlikely(count == max_segments))
2814 goto abort_linearize;
2815
2816 boundary =
2817 (low + mgp->tx_boundary) & ~(mgp->tx_boundary - 1);
2818 seglen = boundary - low;
2819 if (seglen > len)
2820 seglen = len;
2821 flags_next = flags & ~MXGEFW_FLAGS_FIRST;
2822 cum_len_next = cum_len + seglen;
2823 if (mss) { /* TSO */
2824 (req - rdma_count)->rdma_count = rdma_count + 1;
2825
2826 if (likely(cum_len >= 0)) { /* payload */
2827 int next_is_first, chop;
2828
2829 chop = (cum_len_next > mss);
2830 cum_len_next = cum_len_next % mss;
2831 next_is_first = (cum_len_next == 0);
2832 flags |= chop * MXGEFW_FLAGS_TSO_CHOP;
2833 flags_next |= next_is_first *
2834 MXGEFW_FLAGS_FIRST;
2835 rdma_count |= -(chop | next_is_first);
2836 rdma_count += chop & !next_is_first;
2837 } else if (likely(cum_len_next >= 0)) { /* header ends */
2838 int small;
2839
2840 rdma_count = -1;
2841 cum_len_next = 0;
2842 seglen = -cum_len;
2843 small = (mss <= MXGEFW_SEND_SMALL_SIZE);
2844 flags_next = MXGEFW_FLAGS_TSO_PLD |
2845 MXGEFW_FLAGS_FIRST |
2846 (small * MXGEFW_FLAGS_SMALL);
2847 }
2848 }
2849 req->addr_high = high_swapped;
2850 req->addr_low = htonl(low);
2851 req->pseudo_hdr_offset = htons(pseudo_hdr_offset);
2852 req->pad = 0; /* complete solid 16-byte block; does this matter? */
2853 req->rdma_count = 1;
2854 req->length = htons(seglen);
2855 req->cksum_offset = cksum_offset;
2856 req->flags = flags | ((cum_len & 1) * odd_flag);
2857
2858 low += seglen;
2859 len -= seglen;
2860 cum_len = cum_len_next;
2861 flags = flags_next;
2862 req++;
2863 count++;
2864 rdma_count++;
2865 if (cksum_offset != 0 && !(mss && skb_is_gso_v6(skb))) {
2866 if (unlikely(cksum_offset > seglen))
2867 cksum_offset -= seglen;
2868 else
2869 cksum_offset = 0;
2870 }
2871 }
2872 if (frag_idx == frag_cnt)
2873 break;
2874
2875 /* map next fragment for DMA */
2876 idx = (count + tx->req) & tx->mask;
2877 frag = &skb_shinfo(skb)->frags[frag_idx];
2878 frag_idx++;
2879 len = frag->size;
2880 bus = pci_map_page(mgp->pdev, frag->page, frag->page_offset,
2881 len, PCI_DMA_TODEVICE);
2882 dma_unmap_addr_set(&tx->info[idx], bus, bus);
2883 dma_unmap_len_set(&tx->info[idx], len, len);
2884 }
2885
2886 (req - rdma_count)->rdma_count = rdma_count;
2887 if (mss)
2888 do {
2889 req--;
2890 req->flags |= MXGEFW_FLAGS_TSO_LAST;
2891 } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP |
2892 MXGEFW_FLAGS_FIRST)));
2893 idx = ((count - 1) + tx->req) & tx->mask;
2894 tx->info[idx].last = 1;
2895 myri10ge_submit_req(tx, tx->req_list, count);
2896 /* if using multiple tx queues, make sure NIC polls the
2897 * current slice */
2898 if ((mgp->dev->real_num_tx_queues > 1) && tx->queue_active == 0) {
2899 tx->queue_active = 1;
2900 put_be32(htonl(1), tx->send_go);
2901 mb();
2902 mmiowb();
2903 }
2904 tx->pkt_start++;
2905 if ((avail - count) < MXGEFW_MAX_SEND_DESC) {
2906 tx->stop_queue++;
2907 netif_tx_stop_queue(netdev_queue);
2908 }
2909 return NETDEV_TX_OK;
2910
2911 abort_linearize:
2912 /* Free any DMA resources we've alloced and clear out the skb
2913 * slot so as to not trip up assertions, and to avoid a
2914 * double-free if linearizing fails */
2915
2916 last_idx = (idx + 1) & tx->mask;
2917 idx = tx->req & tx->mask;
2918 tx->info[idx].skb = NULL;
2919 do {
2920 len = dma_unmap_len(&tx->info[idx], len);
2921 if (len) {
2922 if (tx->info[idx].skb != NULL)
2923 pci_unmap_single(mgp->pdev,
2924 dma_unmap_addr(&tx->info[idx],
2925 bus), len,
2926 PCI_DMA_TODEVICE);
2927 else
2928 pci_unmap_page(mgp->pdev,
2929 dma_unmap_addr(&tx->info[idx],
2930 bus), len,
2931 PCI_DMA_TODEVICE);
2932 dma_unmap_len_set(&tx->info[idx], len, 0);
2933 tx->info[idx].skb = NULL;
2934 }
2935 idx = (idx + 1) & tx->mask;
2936 } while (idx != last_idx);
2937 if (skb_is_gso(skb)) {
2938 netdev_err(mgp->dev, "TSO but wanted to linearize?!?!?\n");
2939 goto drop;
2940 }
2941
2942 if (skb_linearize(skb))
2943 goto drop;
2944
2945 tx->linearized++;
2946 goto again;
2947
2948 drop:
2949 dev_kfree_skb_any(skb);
2950 ss->stats.tx_dropped += 1;
2951 return NETDEV_TX_OK;
2952
2953 }
2954
2955 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
2956 struct net_device *dev)
2957 {
2958 struct sk_buff *segs, *curr;
2959 struct myri10ge_priv *mgp = netdev_priv(dev);
2960 struct myri10ge_slice_state *ss;
2961 netdev_tx_t status;
2962
2963 segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO6);
2964 if (IS_ERR(segs))
2965 goto drop;
2966
2967 while (segs) {
2968 curr = segs;
2969 segs = segs->next;
2970 curr->next = NULL;
2971 status = myri10ge_xmit(curr, dev);
2972 if (status != 0) {
2973 dev_kfree_skb_any(curr);
2974 if (segs != NULL) {
2975 curr = segs;
2976 segs = segs->next;
2977 curr->next = NULL;
2978 dev_kfree_skb_any(segs);
2979 }
2980 goto drop;
2981 }
2982 }
2983 dev_kfree_skb_any(skb);
2984 return NETDEV_TX_OK;
2985
2986 drop:
2987 ss = &mgp->ss[skb_get_queue_mapping(skb)];
2988 dev_kfree_skb_any(skb);
2989 ss->stats.tx_dropped += 1;
2990 return NETDEV_TX_OK;
2991 }
2992
2993 static struct net_device_stats *myri10ge_get_stats(struct net_device *dev)
2994 {
2995 struct myri10ge_priv *mgp = netdev_priv(dev);
2996 struct myri10ge_slice_netstats *slice_stats;
2997 struct net_device_stats *stats = &dev->stats;
2998 int i;
2999
3000 spin_lock(&mgp->stats_lock);
3001 memset(stats, 0, sizeof(*stats));
3002 for (i = 0; i < mgp->num_slices; i++) {
3003 slice_stats = &mgp->ss[i].stats;
3004 stats->rx_packets += slice_stats->rx_packets;
3005 stats->tx_packets += slice_stats->tx_packets;
3006 stats->rx_bytes += slice_stats->rx_bytes;
3007 stats->tx_bytes += slice_stats->tx_bytes;
3008 stats->rx_dropped += slice_stats->rx_dropped;
3009 stats->tx_dropped += slice_stats->tx_dropped;
3010 }
3011 spin_unlock(&mgp->stats_lock);
3012 return stats;
3013 }
3014
3015 static void myri10ge_set_multicast_list(struct net_device *dev)
3016 {
3017 struct myri10ge_priv *mgp = netdev_priv(dev);
3018 struct myri10ge_cmd cmd;
3019 struct netdev_hw_addr *ha;
3020 __be32 data[2] = { 0, 0 };
3021 int err;
3022
3023 /* can be called from atomic contexts,
3024 * pass 1 to force atomicity in myri10ge_send_cmd() */
3025 myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1);
3026
3027 /* This firmware is known to not support multicast */
3028 if (!mgp->fw_multicast_support)
3029 return;
3030
3031 /* Disable multicast filtering */
3032
3033 err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1);
3034 if (err != 0) {
3035 netdev_err(dev, "Failed MXGEFW_ENABLE_ALLMULTI, error status: %d\n",
3036 err);
3037 goto abort;
3038 }
3039
3040 if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) {
3041 /* request to disable multicast filtering, so quit here */
3042 return;
3043 }
3044
3045 /* Flush the filters */
3046
3047 err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS,
3048 &cmd, 1);
3049 if (err != 0) {
3050 netdev_err(dev, "Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS, error status: %d\n",
3051 err);
3052 goto abort;
3053 }
3054
3055 /* Walk the multicast list, and add each address */
3056 netdev_for_each_mc_addr(ha, dev) {
3057 memcpy(data, &ha->addr, 6);
3058 cmd.data0 = ntohl(data[0]);
3059 cmd.data1 = ntohl(data[1]);
3060 err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP,
3061 &cmd, 1);
3062
3063 if (err != 0) {
3064 netdev_err(dev, "Failed MXGEFW_JOIN_MULTICAST_GROUP, error status:%d %pM\n",
3065 err, ha->addr);
3066 goto abort;
3067 }
3068 }
3069 /* Enable multicast filtering */
3070 err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1);
3071 if (err != 0) {
3072 netdev_err(dev, "Failed MXGEFW_DISABLE_ALLMULTI, error status: %d\n",
3073 err);
3074 goto abort;
3075 }
3076
3077 return;
3078
3079 abort:
3080 return;
3081 }
3082
3083 static int myri10ge_set_mac_address(struct net_device *dev, void *addr)
3084 {
3085 struct sockaddr *sa = addr;
3086 struct myri10ge_priv *mgp = netdev_priv(dev);
3087 int status;
3088
3089 if (!is_valid_ether_addr(sa->sa_data))
3090 return -EADDRNOTAVAIL;
3091
3092 status = myri10ge_update_mac_address(mgp, sa->sa_data);
3093 if (status != 0) {
3094 netdev_err(dev, "changing mac address failed with %d\n",
3095 status);
3096 return status;
3097 }
3098
3099 /* change the dev structure */
3100 memcpy(dev->dev_addr, sa->sa_data, 6);
3101 return 0;
3102 }
3103
3104 static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
3105 {
3106 struct myri10ge_priv *mgp = netdev_priv(dev);
3107 int error = 0;
3108
3109 if ((new_mtu < 68) || (ETH_HLEN + new_mtu > MYRI10GE_MAX_ETHER_MTU)) {
3110 netdev_err(dev, "new mtu (%d) is not valid\n", new_mtu);
3111 return -EINVAL;
3112 }
3113 netdev_info(dev, "changing mtu from %d to %d\n", dev->mtu, new_mtu);
3114 if (mgp->running) {
3115 /* if we change the mtu on an active device, we must
3116 * reset the device so the firmware sees the change */
3117 myri10ge_close(dev);
3118 dev->mtu = new_mtu;
3119 myri10ge_open(dev);
3120 } else
3121 dev->mtu = new_mtu;
3122
3123 return error;
3124 }
3125
3126 /*
3127 * Enable ECRC to align PCI-E Completion packets on an 8-byte boundary.
3128 * Only do it if the bridge is a root port since we don't want to disturb
3129 * any other device, except if forced with myri10ge_ecrc_enable > 1.
3130 */
3131
3132 static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
3133 {
3134 struct pci_dev *bridge = mgp->pdev->bus->self;
3135 struct device *dev = &mgp->pdev->dev;
3136 unsigned cap;
3137 unsigned err_cap;
3138 u16 val;
3139 u8 ext_type;
3140 int ret;
3141
3142 if (!myri10ge_ecrc_enable || !bridge)
3143 return;
3144
3145 /* check that the bridge is a root port */
3146 cap = pci_find_capability(bridge, PCI_CAP_ID_EXP);
3147 pci_read_config_word(bridge, cap + PCI_CAP_FLAGS, &val);
3148 ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
3149 if (ext_type != PCI_EXP_TYPE_ROOT_PORT) {
3150 if (myri10ge_ecrc_enable > 1) {
3151 struct pci_dev *prev_bridge, *old_bridge = bridge;
3152
3153 /* Walk the hierarchy up to the root port
3154 * where ECRC has to be enabled */
3155 do {
3156 prev_bridge = bridge;
3157 bridge = bridge->bus->self;
3158 if (!bridge || prev_bridge == bridge) {
3159 dev_err(dev,
3160 "Failed to find root port"
3161 " to force ECRC\n");
3162 return;
3163 }
3164 cap =
3165 pci_find_capability(bridge, PCI_CAP_ID_EXP);
3166 pci_read_config_word(bridge,
3167 cap + PCI_CAP_FLAGS, &val);
3168 ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
3169 } while (ext_type != PCI_EXP_TYPE_ROOT_PORT);
3170
3171 dev_info(dev,
3172 "Forcing ECRC on non-root port %s"
3173 " (enabling on root port %s)\n",
3174 pci_name(old_bridge), pci_name(bridge));
3175 } else {
3176 dev_err(dev,
3177 "Not enabling ECRC on non-root port %s\n",
3178 pci_name(bridge));
3179 return;
3180 }
3181 }
3182
3183 cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
3184 if (!cap)
3185 return;
3186
3187 ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap);
3188 if (ret) {
3189 dev_err(dev, "failed reading ext-conf-space of %s\n",
3190 pci_name(bridge));
3191 dev_err(dev, "\t pci=nommconf in use? "
3192 "or buggy/incomplete/absent ACPI MCFG attr?\n");
3193 return;
3194 }
3195 if (!(err_cap & PCI_ERR_CAP_ECRC_GENC))
3196 return;
3197
3198 err_cap |= PCI_ERR_CAP_ECRC_GENE;
3199 pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap);
3200 dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge));
3201 }
3202
3203 /*
3204 * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput
3205 * when the PCI-E Completion packets are aligned on an 8-byte
3206 * boundary. Some PCI-E chip sets always align Completion packets; on
3207 * the ones that do not, the alignment can be enforced by enabling
3208 * ECRC generation (if supported).
3209 *
3210 * When PCI-E Completion packets are not aligned, it is actually more
3211 * efficient to limit Read-DMA transactions to 2KB, rather than 4KB.
3212 *
3213 * If the driver can neither enable ECRC nor verify that it has
3214 * already been enabled, then it must use a firmware image which works
3215 * around unaligned completion packets (myri10ge_rss_ethp_z8e.dat), and it
3216 * should also ensure that it never gives the device a Read-DMA which is
3217 * larger than 2KB by setting the tx_boundary to 2KB. If ECRC is
3218 * enabled, then the driver should use the aligned (myri10ge_rss_eth_z8e.dat)
3219 * firmware image, and set tx_boundary to 4KB.
3220 */
3221
3222 static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
3223 {
3224 struct pci_dev *pdev = mgp->pdev;
3225 struct device *dev = &pdev->dev;
3226 int status;
3227
3228 mgp->tx_boundary = 4096;
3229 /*
3230 * Verify the max read request size was set to 4KB
3231 * before trying the test with 4KB.
3232 */
3233 status = pcie_get_readrq(pdev);
3234 if (status < 0) {
3235 dev_err(dev, "Couldn't read max read req size: %d\n", status);
3236 goto abort;
3237 }
3238 if (status != 4096) {
3239 dev_warn(dev, "Max Read Request size != 4096 (%d)\n", status);
3240 mgp->tx_boundary = 2048;
3241 }
3242 /*
3243 * load the optimized firmware (which assumes aligned PCIe
3244 * completions) in order to see if it works on this host.
3245 */
3246 set_fw_name(mgp, myri10ge_fw_aligned, false);
3247 status = myri10ge_load_firmware(mgp, 1);
3248 if (status != 0) {
3249 goto abort;
3250 }
3251
3252 /*
3253 * Enable ECRC if possible
3254 */
3255 myri10ge_enable_ecrc(mgp);
3256
3257 /*
3258 * Run a DMA test which watches for unaligned completions and
3259 * aborts on the first one seen.
3260 */
3261
3262 status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST);
3263 if (status == 0)
3264 return; /* keep the aligned firmware */
3265
3266 if (status != -E2BIG)
3267 dev_warn(dev, "DMA test failed: %d\n", status);
3268 if (status == -ENOSYS)
3269 dev_warn(dev, "Falling back to ethp! "
3270 "Please install up to date fw\n");
3271 abort:
3272 /* fall back to using the unaligned firmware */
3273 mgp->tx_boundary = 2048;
3274 set_fw_name(mgp, myri10ge_fw_unaligned, false);
3275
3276 }
3277
3278 static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
3279 {
3280 int overridden = 0;
3281
3282 if (myri10ge_force_firmware == 0) {
3283 int link_width, exp_cap;
3284 u16 lnk;
3285
3286 exp_cap = pci_find_capability(mgp->pdev, PCI_CAP_ID_EXP);
3287 pci_read_config_word(mgp->pdev, exp_cap + PCI_EXP_LNKSTA, &lnk);
3288 link_width = (lnk >> 4) & 0x3f;
3289
3290 /* Check to see if Link is less than 8 or if the
3291 * upstream bridge is known to provide aligned
3292 * completions */
3293 if (link_width < 8) {
3294 dev_info(&mgp->pdev->dev, "PCIE x%d Link\n",
3295 link_width);
3296 mgp->tx_boundary = 4096;
3297 set_fw_name(mgp, myri10ge_fw_aligned, false);
3298 } else {
3299 myri10ge_firmware_probe(mgp);
3300 }
3301 } else {
3302 if (myri10ge_force_firmware == 1) {
3303 dev_info(&mgp->pdev->dev,
3304 "Assuming aligned completions (forced)\n");
3305 mgp->tx_boundary = 4096;
3306 set_fw_name(mgp, myri10ge_fw_aligned, false);
3307 } else {
3308 dev_info(&mgp->pdev->dev,
3309 "Assuming unaligned completions (forced)\n");
3310 mgp->tx_boundary = 2048;
3311 set_fw_name(mgp, myri10ge_fw_unaligned, false);
3312 }
3313 }
3314
3315 kparam_block_sysfs_write(myri10ge_fw_name);
3316 if (myri10ge_fw_name != NULL) {
3317 char *fw_name = kstrdup(myri10ge_fw_name, GFP_KERNEL);
3318 if (fw_name) {
3319 overridden = 1;
3320 set_fw_name(mgp, fw_name, true);
3321 }
3322 }
3323 kparam_unblock_sysfs_write(myri10ge_fw_name);
3324
3325 if (mgp->board_number < MYRI10GE_MAX_BOARDS &&
3326 myri10ge_fw_names[mgp->board_number] != NULL &&
3327 strlen(myri10ge_fw_names[mgp->board_number])) {
3328 set_fw_name(mgp, myri10ge_fw_names[mgp->board_number], false);
3329 overridden = 1;
3330 }
3331 if (overridden)
3332 dev_info(&mgp->pdev->dev, "overriding firmware to %s\n",
3333 mgp->fw_name);
3334 }
3335
3336 #ifdef CONFIG_PM
3337 static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state)
3338 {
3339 struct myri10ge_priv *mgp;
3340 struct net_device *netdev;
3341
3342 mgp = pci_get_drvdata(pdev);
3343 if (mgp == NULL)
3344 return -EINVAL;
3345 netdev = mgp->dev;
3346
3347 netif_device_detach(netdev);
3348 if (netif_running(netdev)) {
3349 netdev_info(netdev, "closing\n");
3350 rtnl_lock();
3351 myri10ge_close(netdev);
3352 rtnl_unlock();
3353 }
3354 myri10ge_dummy_rdma(mgp, 0);
3355 pci_save_state(pdev);
3356 pci_disable_device(pdev);
3357
3358 return pci_set_power_state(pdev, pci_choose_state(pdev, state));
3359 }
3360
3361 static int myri10ge_resume(struct pci_dev *pdev)
3362 {
3363 struct myri10ge_priv *mgp;
3364 struct net_device *netdev;
3365 int status;
3366 u16 vendor;
3367
3368 mgp = pci_get_drvdata(pdev);
3369 if (mgp == NULL)
3370 return -EINVAL;
3371 netdev = mgp->dev;
3372 pci_set_power_state(pdev, 0); /* zeros conf space as a side effect */
3373 msleep(5); /* give card time to respond */
3374 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3375 if (vendor == 0xffff) {
3376 netdev_err(mgp->dev, "device disappeared!\n");
3377 return -EIO;
3378 }
3379
3380 status = pci_restore_state(pdev);
3381 if (status)
3382 return status;
3383
3384 status = pci_enable_device(pdev);
3385 if (status) {
3386 dev_err(&pdev->dev, "failed to enable device\n");
3387 return status;
3388 }
3389
3390 pci_set_master(pdev);
3391
3392 myri10ge_reset(mgp);
3393 myri10ge_dummy_rdma(mgp, 1);
3394
3395 /* Save configuration space to be restored if the
3396 * nic resets due to a parity error */
3397 pci_save_state(pdev);
3398
3399 if (netif_running(netdev)) {
3400 rtnl_lock();
3401 status = myri10ge_open(netdev);
3402 rtnl_unlock();
3403 if (status != 0)
3404 goto abort_with_enabled;
3405
3406 }
3407 netif_device_attach(netdev);
3408
3409 return 0;
3410
3411 abort_with_enabled:
3412 pci_disable_device(pdev);
3413 return -EIO;
3414
3415 }
3416 #endif /* CONFIG_PM */
3417
3418 static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp)
3419 {
3420 struct pci_dev *pdev = mgp->pdev;
3421 int vs = mgp->vendor_specific_offset;
3422 u32 reboot;
3423
3424 /*enter read32 mode */
3425 pci_write_config_byte(pdev, vs + 0x10, 0x3);
3426
3427 /*read REBOOT_STATUS (0xfffffff0) */
3428 pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0);
3429 pci_read_config_dword(pdev, vs + 0x14, &reboot);
3430 return reboot;
3431 }
3432
3433 /*
3434 * This watchdog is used to check whether the board has suffered
3435 * from a parity error and needs to be recovered.
3436 */
3437 static void myri10ge_watchdog(struct work_struct *work)
3438 {
3439 struct myri10ge_priv *mgp =
3440 container_of(work, struct myri10ge_priv, watchdog_work);
3441 struct myri10ge_tx_buf *tx;
3442 u32 reboot;
3443 int status, rebooted;
3444 int i;
3445 u16 cmd, vendor;
3446
3447 mgp->watchdog_resets++;
3448 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3449 rebooted = 0;
3450 if ((cmd & PCI_COMMAND_MASTER) == 0) {
3451 /* Bus master DMA disabled? Check to see
3452 * if the card rebooted due to a parity error
3453 * For now, just report it */
3454 reboot = myri10ge_read_reboot(mgp);
3455 netdev_err(mgp->dev, "NIC rebooted (0x%x),%s resetting\n",
3456 reboot,
3457 myri10ge_reset_recover ? "" : " not");
3458 if (myri10ge_reset_recover == 0)
3459 return;
3460 rtnl_lock();
3461 mgp->rebooted = 1;
3462 rebooted = 1;
3463 myri10ge_close(mgp->dev);
3464 myri10ge_reset_recover--;
3465 mgp->rebooted = 0;
3466 /*
3467 * A rebooted nic will come back with config space as
3468 * it was after power was applied to PCIe bus.
3469 * Attempt to restore config space which was saved
3470 * when the driver was loaded, or the last time the
3471 * nic was resumed from power saving mode.
3472 */
3473 pci_restore_state(mgp->pdev);
3474
3475 /* save state again for accounting reasons */
3476 pci_save_state(mgp->pdev);
3477
3478 } else {
3479 /* if we get back -1's from our slot, perhaps somebody
3480 * powered off our card. Don't try to reset it in
3481 * this case */
3482 if (cmd == 0xffff) {
3483 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3484 if (vendor == 0xffff) {
3485 netdev_err(mgp->dev, "device disappeared!\n");
3486 return;
3487 }
3488 }
3489 /* Perhaps it is a software error. Try to reset */
3490
3491 netdev_err(mgp->dev, "device timeout, resetting\n");
3492 for (i = 0; i < mgp->num_slices; i++) {
3493 tx = &mgp->ss[i].tx;
3494 netdev_err(mgp->dev, "(%d): %d %d %d %d %d %d\n",
3495 i, tx->queue_active, tx->req,
3496 tx->done, tx->pkt_start, tx->pkt_done,
3497 (int)ntohl(mgp->ss[i].fw_stats->
3498 send_done_count));
3499 msleep(2000);
3500 netdev_info(mgp->dev, "(%d): %d %d %d %d %d %d\n",
3501 i, tx->queue_active, tx->req,
3502 tx->done, tx->pkt_start, tx->pkt_done,
3503 (int)ntohl(mgp->ss[i].fw_stats->
3504 send_done_count));
3505 }
3506 }
3507
3508 if (!rebooted) {
3509 rtnl_lock();
3510 myri10ge_close(mgp->dev);
3511 }
3512 status = myri10ge_load_firmware(mgp, 1);
3513 if (status != 0)
3514 netdev_err(mgp->dev, "failed to load firmware\n");
3515 else
3516 myri10ge_open(mgp->dev);
3517 rtnl_unlock();
3518 }
3519
3520 /*
3521 * We use our own timer routine rather than relying upon
3522 * netdev->tx_timeout because we have a very large hardware transmit
3523 * queue. Due to the large queue, the netdev->tx_timeout function
3524 * cannot detect a NIC with a parity error in a timely fashion if the
3525 * NIC is lightly loaded.
3526 */
3527 static void myri10ge_watchdog_timer(unsigned long arg)
3528 {
3529 struct myri10ge_priv *mgp;
3530 struct myri10ge_slice_state *ss;
3531 int i, reset_needed, busy_slice_cnt;
3532 u32 rx_pause_cnt;
3533 u16 cmd;
3534
3535 mgp = (struct myri10ge_priv *)arg;
3536
3537 rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3538 busy_slice_cnt = 0;
3539 for (i = 0, reset_needed = 0;
3540 i < mgp->num_slices && reset_needed == 0; ++i) {
3541
3542 ss = &mgp->ss[i];
3543 if (ss->rx_small.watchdog_needed) {
3544 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
3545 mgp->small_bytes + MXGEFW_PAD,
3546 1);
3547 if (ss->rx_small.fill_cnt - ss->rx_small.cnt >=
3548 myri10ge_fill_thresh)
3549 ss->rx_small.watchdog_needed = 0;
3550 }
3551 if (ss->rx_big.watchdog_needed) {
3552 myri10ge_alloc_rx_pages(mgp, &ss->rx_big,
3553 mgp->big_bytes, 1);
3554 if (ss->rx_big.fill_cnt - ss->rx_big.cnt >=
3555 myri10ge_fill_thresh)
3556 ss->rx_big.watchdog_needed = 0;
3557 }
3558
3559 if (ss->tx.req != ss->tx.done &&
3560 ss->tx.done == ss->watchdog_tx_done &&
3561 ss->watchdog_tx_req != ss->watchdog_tx_done) {
3562 /* nic seems like it might be stuck.. */
3563 if (rx_pause_cnt != mgp->watchdog_pause) {
3564 if (net_ratelimit())
3565 netdev_err(mgp->dev, "slice %d: TX paused, check link partner\n",
3566 i);
3567 } else {
3568 netdev_warn(mgp->dev, "slice %d stuck:", i);
3569 reset_needed = 1;
3570 }
3571 }
3572 if (ss->watchdog_tx_done != ss->tx.done ||
3573 ss->watchdog_rx_done != ss->rx_done.cnt) {
3574 busy_slice_cnt++;
3575 }
3576 ss->watchdog_tx_done = ss->tx.done;
3577 ss->watchdog_tx_req = ss->tx.req;
3578 ss->watchdog_rx_done = ss->rx_done.cnt;
3579 }
3580 /* if we've sent or received no traffic, poll the NIC to
3581 * ensure it is still there. Otherwise, we risk not noticing
3582 * an error in a timely fashion */
3583 if (busy_slice_cnt == 0) {
3584 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3585 if ((cmd & PCI_COMMAND_MASTER) == 0) {
3586 reset_needed = 1;
3587 }
3588 }
3589 mgp->watchdog_pause = rx_pause_cnt;
3590
3591 if (reset_needed) {
3592 schedule_work(&mgp->watchdog_work);
3593 } else {
3594 /* rearm timer */
3595 mod_timer(&mgp->watchdog_timer,
3596 jiffies + myri10ge_watchdog_timeout * HZ);
3597 }
3598 }
3599
3600 static void myri10ge_free_slices(struct myri10ge_priv *mgp)
3601 {
3602 struct myri10ge_slice_state *ss;
3603 struct pci_dev *pdev = mgp->pdev;
3604 size_t bytes;
3605 int i;
3606
3607 if (mgp->ss == NULL)
3608 return;
3609
3610 for (i = 0; i < mgp->num_slices; i++) {
3611 ss = &mgp->ss[i];
3612 if (ss->rx_done.entry != NULL) {
3613 bytes = mgp->max_intr_slots *
3614 sizeof(*ss->rx_done.entry);
3615 dma_free_coherent(&pdev->dev, bytes,
3616 ss->rx_done.entry, ss->rx_done.bus);
3617 ss->rx_done.entry = NULL;
3618 }
3619 if (ss->fw_stats != NULL) {
3620 bytes = sizeof(*ss->fw_stats);
3621 dma_free_coherent(&pdev->dev, bytes,
3622 ss->fw_stats, ss->fw_stats_bus);
3623 ss->fw_stats = NULL;
3624 }
3625 }
3626 kfree(mgp->ss);
3627 mgp->ss = NULL;
3628 }
3629
3630 static int myri10ge_alloc_slices(struct myri10ge_priv *mgp)
3631 {
3632 struct myri10ge_slice_state *ss;
3633 struct pci_dev *pdev = mgp->pdev;
3634 size_t bytes;
3635 int i;
3636
3637 bytes = sizeof(*mgp->ss) * mgp->num_slices;
3638 mgp->ss = kzalloc(bytes, GFP_KERNEL);
3639 if (mgp->ss == NULL) {
3640 return -ENOMEM;
3641 }
3642
3643 for (i = 0; i < mgp->num_slices; i++) {
3644 ss = &mgp->ss[i];
3645 bytes = mgp->max_intr_slots * sizeof(*ss->rx_done.entry);
3646 ss->rx_done.entry = dma_alloc_coherent(&pdev->dev, bytes,
3647 &ss->rx_done.bus,
3648 GFP_KERNEL);
3649 if (ss->rx_done.entry == NULL)
3650 goto abort;
3651 memset(ss->rx_done.entry, 0, bytes);
3652 bytes = sizeof(*ss->fw_stats);
3653 ss->fw_stats = dma_alloc_coherent(&pdev->dev, bytes,
3654 &ss->fw_stats_bus,
3655 GFP_KERNEL);
3656 if (ss->fw_stats == NULL)
3657 goto abort;
3658 ss->mgp = mgp;
3659 ss->dev = mgp->dev;
3660 netif_napi_add(ss->dev, &ss->napi, myri10ge_poll,
3661 myri10ge_napi_weight);
3662 }
3663 return 0;
3664 abort:
3665 myri10ge_free_slices(mgp);
3666 return -ENOMEM;
3667 }
3668
3669 /*
3670 * This function determines the number of slices supported.
3671 * The number slices is the minumum of the number of CPUS,
3672 * the number of MSI-X irqs supported, the number of slices
3673 * supported by the firmware
3674 */
3675 static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
3676 {
3677 struct myri10ge_cmd cmd;
3678 struct pci_dev *pdev = mgp->pdev;
3679 char *old_fw;
3680 bool old_allocated;
3681 int i, status, ncpus, msix_cap;
3682
3683 mgp->num_slices = 1;
3684 msix_cap = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3685 ncpus = num_online_cpus();
3686
3687 if (myri10ge_max_slices == 1 || msix_cap == 0 ||
3688 (myri10ge_max_slices == -1 && ncpus < 2))
3689 return;
3690
3691 /* try to load the slice aware rss firmware */
3692 old_fw = mgp->fw_name;
3693 old_allocated = mgp->fw_name_allocated;
3694 /* don't free old_fw if we override it. */
3695 mgp->fw_name_allocated = false;
3696
3697 if (myri10ge_fw_name != NULL) {
3698 dev_info(&mgp->pdev->dev, "overriding rss firmware to %s\n",
3699 myri10ge_fw_name);
3700 set_fw_name(mgp, myri10ge_fw_name, false);
3701 } else if (old_fw == myri10ge_fw_aligned)
3702 set_fw_name(mgp, myri10ge_fw_rss_aligned, false);
3703 else
3704 set_fw_name(mgp, myri10ge_fw_rss_unaligned, false);
3705 status = myri10ge_load_firmware(mgp, 0);
3706 if (status != 0) {
3707 dev_info(&pdev->dev, "Rss firmware not found\n");
3708 if (old_allocated)
3709 kfree(old_fw);
3710 return;
3711 }
3712
3713 /* hit the board with a reset to ensure it is alive */
3714 memset(&cmd, 0, sizeof(cmd));
3715 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
3716 if (status != 0) {
3717 dev_err(&mgp->pdev->dev, "failed reset\n");
3718 goto abort_with_fw;
3719 }
3720
3721 mgp->max_intr_slots = cmd.data0 / sizeof(struct mcp_slot);
3722
3723 /* tell it the size of the interrupt queues */
3724 cmd.data0 = mgp->max_intr_slots * sizeof(struct mcp_slot);
3725 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
3726 if (status != 0) {
3727 dev_err(&mgp->pdev->dev, "failed MXGEFW_CMD_SET_INTRQ_SIZE\n");
3728 goto abort_with_fw;
3729 }
3730
3731 /* ask the maximum number of slices it supports */
3732 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES, &cmd, 0);
3733 if (status != 0)
3734 goto abort_with_fw;
3735 else
3736 mgp->num_slices = cmd.data0;
3737
3738 /* Only allow multiple slices if MSI-X is usable */
3739 if (!myri10ge_msi) {
3740 goto abort_with_fw;
3741 }
3742
3743 /* if the admin did not specify a limit to how many
3744 * slices we should use, cap it automatically to the
3745 * number of CPUs currently online */
3746 if (myri10ge_max_slices == -1)
3747 myri10ge_max_slices = ncpus;
3748
3749 if (mgp->num_slices > myri10ge_max_slices)
3750 mgp->num_slices = myri10ge_max_slices;
3751
3752 /* Now try to allocate as many MSI-X vectors as we have
3753 * slices. We give up on MSI-X if we can only get a single
3754 * vector. */
3755
3756 mgp->msix_vectors = kzalloc(mgp->num_slices *
3757 sizeof(*mgp->msix_vectors), GFP_KERNEL);
3758 if (mgp->msix_vectors == NULL)
3759 goto disable_msix;
3760 for (i = 0; i < mgp->num_slices; i++) {
3761 mgp->msix_vectors[i].entry = i;
3762 }
3763
3764 while (mgp->num_slices > 1) {
3765 /* make sure it is a power of two */
3766 while (!is_power_of_2(mgp->num_slices))
3767 mgp->num_slices--;
3768 if (mgp->num_slices == 1)
3769 goto disable_msix;
3770 status = pci_enable_msix(pdev, mgp->msix_vectors,
3771 mgp->num_slices);
3772 if (status == 0) {
3773 pci_disable_msix(pdev);
3774 if (old_allocated)
3775 kfree(old_fw);
3776 return;
3777 }
3778 if (status > 0)
3779 mgp->num_slices = status;
3780 else
3781 goto disable_msix;
3782 }
3783
3784 disable_msix:
3785 if (mgp->msix_vectors != NULL) {
3786 kfree(mgp->msix_vectors);
3787 mgp->msix_vectors = NULL;
3788 }
3789
3790 abort_with_fw:
3791 mgp->num_slices = 1;
3792 set_fw_name(mgp, old_fw, old_allocated);
3793 myri10ge_load_firmware(mgp, 0);
3794 }
3795
3796 static const struct net_device_ops myri10ge_netdev_ops = {
3797 .ndo_open = myri10ge_open,
3798 .ndo_stop = myri10ge_close,
3799 .ndo_start_xmit = myri10ge_xmit,
3800 .ndo_get_stats = myri10ge_get_stats,
3801 .ndo_validate_addr = eth_validate_addr,
3802 .ndo_change_mtu = myri10ge_change_mtu,
3803 .ndo_set_multicast_list = myri10ge_set_multicast_list,
3804 .ndo_set_mac_address = myri10ge_set_mac_address,
3805 };
3806
3807 static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3808 {
3809 struct net_device *netdev;
3810 struct myri10ge_priv *mgp;
3811 struct device *dev = &pdev->dev;
3812 int i;
3813 int status = -ENXIO;
3814 int dac_enabled;
3815 unsigned hdr_offset, ss_offset;
3816 static int board_number;
3817
3818 netdev = alloc_etherdev_mq(sizeof(*mgp), MYRI10GE_MAX_SLICES);
3819 if (netdev == NULL) {
3820 dev_err(dev, "Could not allocate ethernet device\n");
3821 return -ENOMEM;
3822 }
3823
3824 SET_NETDEV_DEV(netdev, &pdev->dev);
3825
3826 mgp = netdev_priv(netdev);
3827 mgp->dev = netdev;
3828 mgp->pdev = pdev;
3829 mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
3830 mgp->pause = myri10ge_flow_control;
3831 mgp->intr_coal_delay = myri10ge_intr_coal_delay;
3832 mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT);
3833 mgp->board_number = board_number;
3834 init_waitqueue_head(&mgp->down_wq);
3835
3836 if (pci_enable_device(pdev)) {
3837 dev_err(&pdev->dev, "pci_enable_device call failed\n");
3838 status = -ENODEV;
3839 goto abort_with_netdev;
3840 }
3841
3842 /* Find the vendor-specific cap so we can check
3843 * the reboot register later on */
3844 mgp->vendor_specific_offset
3845 = pci_find_capability(pdev, PCI_CAP_ID_VNDR);
3846
3847 /* Set our max read request to 4KB */
3848 status = pcie_set_readrq(pdev, 4096);
3849 if (status != 0) {
3850 dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n",
3851 status);
3852 goto abort_with_enabled;
3853 }
3854
3855 pci_set_master(pdev);
3856 dac_enabled = 1;
3857 status = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
3858 if (status != 0) {
3859 dac_enabled = 0;
3860 dev_err(&pdev->dev,
3861 "64-bit pci address mask was refused, "
3862 "trying 32-bit\n");
3863 status = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3864 }
3865 if (status != 0) {
3866 dev_err(&pdev->dev, "Error %d setting DMA mask\n", status);
3867 goto abort_with_enabled;
3868 }
3869 (void)pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
3870 mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd),
3871 &mgp->cmd_bus, GFP_KERNEL);
3872 if (mgp->cmd == NULL)
3873 goto abort_with_enabled;
3874
3875 mgp->board_span = pci_resource_len(pdev, 0);
3876 mgp->iomem_base = pci_resource_start(pdev, 0);
3877 mgp->mtrr = -1;
3878 mgp->wc_enabled = 0;
3879 #ifdef CONFIG_MTRR
3880 mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span,
3881 MTRR_TYPE_WRCOMB, 1);
3882 if (mgp->mtrr >= 0)
3883 mgp->wc_enabled = 1;
3884 #endif
3885 mgp->sram = ioremap_wc(mgp->iomem_base, mgp->board_span);
3886 if (mgp->sram == NULL) {
3887 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n",
3888 mgp->board_span, mgp->iomem_base);
3889 status = -ENXIO;
3890 goto abort_with_mtrr;
3891 }
3892 hdr_offset =
3893 ntohl(__raw_readl(mgp->sram + MCP_HEADER_PTR_OFFSET)) & 0xffffc;
3894 ss_offset = hdr_offset + offsetof(struct mcp_gen_header, string_specs);
3895 mgp->sram_size = ntohl(__raw_readl(mgp->sram + ss_offset));
3896 if (mgp->sram_size > mgp->board_span ||
3897 mgp->sram_size <= MYRI10GE_FW_OFFSET) {
3898 dev_err(&pdev->dev,
3899 "invalid sram_size %dB or board span %ldB\n",
3900 mgp->sram_size, mgp->board_span);
3901 goto abort_with_ioremap;
3902 }
3903 memcpy_fromio(mgp->eeprom_strings,
3904 mgp->sram + mgp->sram_size, MYRI10GE_EEPROM_STRINGS_SIZE);
3905 memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2);
3906 status = myri10ge_read_mac_addr(mgp);
3907 if (status)
3908 goto abort_with_ioremap;
3909
3910 for (i = 0; i < ETH_ALEN; i++)
3911 netdev->dev_addr[i] = mgp->mac_addr[i];
3912
3913 myri10ge_select_firmware(mgp);
3914
3915 status = myri10ge_load_firmware(mgp, 1);
3916 if (status != 0) {
3917 dev_err(&pdev->dev, "failed to load firmware\n");
3918 goto abort_with_ioremap;
3919 }
3920 myri10ge_probe_slices(mgp);
3921 status = myri10ge_alloc_slices(mgp);
3922 if (status != 0) {
3923 dev_err(&pdev->dev, "failed to alloc slice state\n");
3924 goto abort_with_firmware;
3925 }
3926 netdev->real_num_tx_queues = mgp->num_slices;
3927 status = myri10ge_reset(mgp);
3928 if (status != 0) {
3929 dev_err(&pdev->dev, "failed reset\n");
3930 goto abort_with_slices;
3931 }
3932 #ifdef CONFIG_MYRI10GE_DCA
3933 myri10ge_setup_dca(mgp);
3934 #endif
3935 pci_set_drvdata(pdev, mgp);
3936 if ((myri10ge_initial_mtu + ETH_HLEN) > MYRI10GE_MAX_ETHER_MTU)
3937 myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
3938 if ((myri10ge_initial_mtu + ETH_HLEN) < 68)
3939 myri10ge_initial_mtu = 68;
3940
3941 netdev->netdev_ops = &myri10ge_netdev_ops;
3942 netdev->mtu = myri10ge_initial_mtu;
3943 netdev->base_addr = mgp->iomem_base;
3944 netdev->features = mgp->features;
3945
3946 if (dac_enabled)
3947 netdev->features |= NETIF_F_HIGHDMA;
3948 netdev->features |= NETIF_F_LRO;
3949
3950 netdev->vlan_features |= mgp->features;
3951 if (mgp->fw_ver_tiny < 37)
3952 netdev->vlan_features &= ~NETIF_F_TSO6;
3953 if (mgp->fw_ver_tiny < 32)
3954 netdev->vlan_features &= ~NETIF_F_TSO;
3955
3956 /* make sure we can get an irq, and that MSI can be
3957 * setup (if available). Also ensure netdev->irq
3958 * is set to correct value if MSI is enabled */
3959 status = myri10ge_request_irq(mgp);
3960 if (status != 0)
3961 goto abort_with_firmware;
3962 netdev->irq = pdev->irq;
3963 myri10ge_free_irq(mgp);
3964
3965 /* Save configuration space to be restored if the
3966 * nic resets due to a parity error */
3967 pci_save_state(pdev);
3968
3969 /* Setup the watchdog timer */
3970 setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer,
3971 (unsigned long)mgp);
3972
3973 spin_lock_init(&mgp->stats_lock);
3974 SET_ETHTOOL_OPS(netdev, &myri10ge_ethtool_ops);
3975 INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog);
3976 status = register_netdev(netdev);
3977 if (status != 0) {
3978 dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
3979 goto abort_with_state;
3980 }
3981 if (mgp->msix_enabled)
3982 dev_info(dev, "%d MSI-X IRQs, tx bndry %d, fw %s, WC %s\n",
3983 mgp->num_slices, mgp->tx_boundary, mgp->fw_name,
3984 (mgp->wc_enabled ? "Enabled" : "Disabled"));
3985 else
3986 dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, WC %s\n",
3987 mgp->msi_enabled ? "MSI" : "xPIC",
3988 netdev->irq, mgp->tx_boundary, mgp->fw_name,
3989 (mgp->wc_enabled ? "Enabled" : "Disabled"));
3990
3991 board_number++;
3992 return 0;
3993
3994 abort_with_state:
3995 pci_restore_state(pdev);
3996
3997 abort_with_slices:
3998 myri10ge_free_slices(mgp);
3999
4000 abort_with_firmware:
4001 myri10ge_dummy_rdma(mgp, 0);
4002
4003 abort_with_ioremap:
4004 if (mgp->mac_addr_string != NULL)
4005 dev_err(&pdev->dev,
4006 "myri10ge_probe() failed: MAC=%s, SN=%ld\n",
4007 mgp->mac_addr_string, mgp->serial_number);
4008 iounmap(mgp->sram);
4009
4010 abort_with_mtrr:
4011 #ifdef CONFIG_MTRR
4012 if (mgp->mtrr >= 0)
4013 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
4014 #endif
4015 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
4016 mgp->cmd, mgp->cmd_bus);
4017
4018 abort_with_enabled:
4019 pci_disable_device(pdev);
4020
4021 abort_with_netdev:
4022 set_fw_name(mgp, NULL, false);
4023 free_netdev(netdev);
4024 return status;
4025 }
4026
4027 /*
4028 * myri10ge_remove
4029 *
4030 * Does what is necessary to shutdown one Myrinet device. Called
4031 * once for each Myrinet card by the kernel when a module is
4032 * unloaded.
4033 */
4034 static void myri10ge_remove(struct pci_dev *pdev)
4035 {
4036 struct myri10ge_priv *mgp;
4037 struct net_device *netdev;
4038
4039 mgp = pci_get_drvdata(pdev);
4040 if (mgp == NULL)
4041 return;
4042
4043 flush_scheduled_work();
4044 netdev = mgp->dev;
4045 unregister_netdev(netdev);
4046
4047 #ifdef CONFIG_MYRI10GE_DCA
4048 myri10ge_teardown_dca(mgp);
4049 #endif
4050 myri10ge_dummy_rdma(mgp, 0);
4051
4052 /* avoid a memory leak */
4053 pci_restore_state(pdev);
4054
4055 iounmap(mgp->sram);
4056
4057 #ifdef CONFIG_MTRR
4058 if (mgp->mtrr >= 0)
4059 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
4060 #endif
4061 myri10ge_free_slices(mgp);
4062 if (mgp->msix_vectors != NULL)
4063 kfree(mgp->msix_vectors);
4064 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
4065 mgp->cmd, mgp->cmd_bus);
4066
4067 set_fw_name(mgp, NULL, false);
4068 free_netdev(netdev);
4069 pci_disable_device(pdev);
4070 pci_set_drvdata(pdev, NULL);
4071 }
4072
4073 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E 0x0008
4074 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9 0x0009
4075
4076 static DEFINE_PCI_DEVICE_TABLE(myri10ge_pci_tbl) = {
4077 {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)},
4078 {PCI_DEVICE
4079 (PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9)},
4080 {0},
4081 };
4082
4083 MODULE_DEVICE_TABLE(pci, myri10ge_pci_tbl);
4084
4085 static struct pci_driver myri10ge_driver = {
4086 .name = "myri10ge",
4087 .probe = myri10ge_probe,
4088 .remove = myri10ge_remove,
4089 .id_table = myri10ge_pci_tbl,
4090 #ifdef CONFIG_PM
4091 .suspend = myri10ge_suspend,
4092 .resume = myri10ge_resume,
4093 #endif
4094 };
4095
4096 #ifdef CONFIG_MYRI10GE_DCA
4097 static int
4098 myri10ge_notify_dca(struct notifier_block *nb, unsigned long event, void *p)
4099 {
4100 int err = driver_for_each_device(&myri10ge_driver.driver,
4101 NULL, &event,
4102 myri10ge_notify_dca_device);
4103
4104 if (err)
4105 return NOTIFY_BAD;
4106 return NOTIFY_DONE;
4107 }
4108
4109 static struct notifier_block myri10ge_dca_notifier = {
4110 .notifier_call = myri10ge_notify_dca,
4111 .next = NULL,
4112 .priority = 0,
4113 };
4114 #endif /* CONFIG_MYRI10GE_DCA */
4115
4116 static __init int myri10ge_init_module(void)
4117 {
4118 pr_info("Version %s\n", MYRI10GE_VERSION_STR);
4119
4120 if (myri10ge_rss_hash > MXGEFW_RSS_HASH_TYPE_MAX) {
4121 pr_err("Illegal rssh hash type %d, defaulting to source port\n",
4122 myri10ge_rss_hash);
4123 myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT;
4124 }
4125 #ifdef CONFIG_MYRI10GE_DCA
4126 dca_register_notify(&myri10ge_dca_notifier);
4127 #endif
4128 if (myri10ge_max_slices > MYRI10GE_MAX_SLICES)
4129 myri10ge_max_slices = MYRI10GE_MAX_SLICES;
4130
4131 return pci_register_driver(&myri10ge_driver);
4132 }
4133
4134 module_init(myri10ge_init_module);
4135
4136 static __exit void myri10ge_cleanup_module(void)
4137 {
4138 #ifdef CONFIG_MYRI10GE_DCA
4139 dca_unregister_notify(&myri10ge_dca_notifier);
4140 #endif
4141 pci_unregister_driver(&myri10ge_driver);
4142 }
4143
4144 module_exit(myri10ge_cleanup_module);
Linux with added FPC-III support