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