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x86/mm/pat: Don't report PAT on CPUs that don't support it
[linux/fpc-iii.git] / drivers / net / ethernet / myricom / myri10ge / myri10ge.c
blobb171ed2015fe479b6d7d099f14e188a3dd8cda00
1 /*************************************************************************
2 * myri10ge.c: Myricom Myri-10G Ethernet driver.
3 *
4 * Copyright (C) 2005 - 2011 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/dca.h>
54 #include <linux/ip.h>
55 #include <linux/inet.h>
56 #include <linux/in.h>
57 #include <linux/ethtool.h>
58 #include <linux/firmware.h>
59 #include <linux/delay.h>
60 #include <linux/timer.h>
61 #include <linux/vmalloc.h>
62 #include <linux/crc32.h>
63 #include <linux/moduleparam.h>
64 #include <linux/io.h>
65 #include <linux/log2.h>
66 #include <linux/slab.h>
67 #include <linux/prefetch.h>
68 #include <net/checksum.h>
69 #include <net/ip.h>
70 #include <net/tcp.h>
71 #include <asm/byteorder.h>
72 #include <asm/processor.h>
73 #include <net/busy_poll.h>
74
75 #include "myri10ge_mcp.h"
76 #include "myri10ge_mcp_gen_header.h"
77
78 #define MYRI10GE_VERSION_STR "1.5.3-1.534"
79
80 MODULE_DESCRIPTION("Myricom 10G driver (10GbE)");
81 MODULE_AUTHOR("Maintainer: help@myri.com");
82 MODULE_VERSION(MYRI10GE_VERSION_STR);
83 MODULE_LICENSE("Dual BSD/GPL");
84
85 #define MYRI10GE_MAX_ETHER_MTU 9014
86
87 #define MYRI10GE_ETH_STOPPED 0
88 #define MYRI10GE_ETH_STOPPING 1
89 #define MYRI10GE_ETH_STARTING 2
90 #define MYRI10GE_ETH_RUNNING 3
91 #define MYRI10GE_ETH_OPEN_FAILED 4
92
93 #define MYRI10GE_EEPROM_STRINGS_SIZE 256
94 #define MYRI10GE_MAX_SEND_DESC_TSO ((65536 / 2048) * 2)
95
96 #define MYRI10GE_NO_CONFIRM_DATA htonl(0xffffffff)
97 #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff
98
99 #define MYRI10GE_ALLOC_ORDER 0
100 #define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE)
101 #define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1)
102
103 #define MYRI10GE_MAX_SLICES 32
104
105 struct myri10ge_rx_buffer_state {
106 struct page *page;
107 int page_offset;
108 DEFINE_DMA_UNMAP_ADDR(bus);
109 DEFINE_DMA_UNMAP_LEN(len);
110 };
111
112 struct myri10ge_tx_buffer_state {
113 struct sk_buff *skb;
114 int last;
115 DEFINE_DMA_UNMAP_ADDR(bus);
116 DEFINE_DMA_UNMAP_LEN(len);
117 };
118
119 struct myri10ge_cmd {
120 u32 data0;
121 u32 data1;
122 u32 data2;
123 };
124
125 struct myri10ge_rx_buf {
126 struct mcp_kreq_ether_recv __iomem *lanai; /* lanai ptr for recv ring */
127 struct mcp_kreq_ether_recv *shadow; /* host shadow of recv ring */
128 struct myri10ge_rx_buffer_state *info;
129 struct page *page;
130 dma_addr_t bus;
131 int page_offset;
132 int cnt;
133 int fill_cnt;
134 int alloc_fail;
135 int mask; /* number of rx slots -1 */
136 int watchdog_needed;
137 };
138
139 struct myri10ge_tx_buf {
140 struct mcp_kreq_ether_send __iomem *lanai; /* lanai ptr for sendq */
141 __be32 __iomem *send_go; /* "go" doorbell ptr */
142 __be32 __iomem *send_stop; /* "stop" doorbell ptr */
143 struct mcp_kreq_ether_send *req_list; /* host shadow of sendq */
144 char *req_bytes;
145 struct myri10ge_tx_buffer_state *info;
146 int mask; /* number of transmit slots -1 */
147 int req ____cacheline_aligned; /* transmit slots submitted */
148 int pkt_start; /* packets started */
149 int stop_queue;
150 int linearized;
151 int done ____cacheline_aligned; /* transmit slots completed */
152 int pkt_done; /* packets completed */
153 int wake_queue;
154 int queue_active;
155 };
156
157 struct myri10ge_rx_done {
158 struct mcp_slot *entry;
159 dma_addr_t bus;
160 int cnt;
161 int idx;
162 };
163
164 struct myri10ge_slice_netstats {
165 unsigned long rx_packets;
166 unsigned long tx_packets;
167 unsigned long rx_bytes;
168 unsigned long tx_bytes;
169 unsigned long rx_dropped;
170 unsigned long tx_dropped;
171 };
172
173 struct myri10ge_slice_state {
174 struct myri10ge_tx_buf tx; /* transmit ring */
175 struct myri10ge_rx_buf rx_small;
176 struct myri10ge_rx_buf rx_big;
177 struct myri10ge_rx_done rx_done;
178 struct net_device *dev;
179 struct napi_struct napi;
180 struct myri10ge_priv *mgp;
181 struct myri10ge_slice_netstats stats;
182 __be32 __iomem *irq_claim;
183 struct mcp_irq_data *fw_stats;
184 dma_addr_t fw_stats_bus;
185 int watchdog_tx_done;
186 int watchdog_tx_req;
187 int watchdog_rx_done;
188 int stuck;
189 #ifdef CONFIG_MYRI10GE_DCA
190 int cached_dca_tag;
191 int cpu;
192 __be32 __iomem *dca_tag;
193 #endif
194 char irq_desc[32];
195 };
196
197 struct myri10ge_priv {
198 struct myri10ge_slice_state *ss;
199 int tx_boundary; /* boundary transmits cannot cross */
200 int num_slices;
201 int running; /* running? */
202 int small_bytes;
203 int big_bytes;
204 int max_intr_slots;
205 struct net_device *dev;
206 u8 __iomem *sram;
207 int sram_size;
208 unsigned long board_span;
209 unsigned long iomem_base;
210 __be32 __iomem *irq_deassert;
211 char *mac_addr_string;
212 struct mcp_cmd_response *cmd;
213 dma_addr_t cmd_bus;
214 struct pci_dev *pdev;
215 int msi_enabled;
216 int msix_enabled;
217 struct msix_entry *msix_vectors;
218 #ifdef CONFIG_MYRI10GE_DCA
219 int dca_enabled;
220 int relaxed_order;
221 #endif
222 u32 link_state;
223 unsigned int rdma_tags_available;
224 int intr_coal_delay;
225 __be32 __iomem *intr_coal_delay_ptr;
226 int wc_cookie;
227 int down_cnt;
228 wait_queue_head_t down_wq;
229 struct work_struct watchdog_work;
230 struct timer_list watchdog_timer;
231 int watchdog_resets;
232 int watchdog_pause;
233 int pause;
234 bool fw_name_allocated;
235 char *fw_name;
236 char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
237 char *product_code_string;
238 char fw_version[128];
239 int fw_ver_major;
240 int fw_ver_minor;
241 int fw_ver_tiny;
242 int adopted_rx_filter_bug;
243 u8 mac_addr[ETH_ALEN]; /* eeprom mac address */
244 unsigned long serial_number;
245 int vendor_specific_offset;
246 int fw_multicast_support;
247 u32 features;
248 u32 max_tso6;
249 u32 read_dma;
250 u32 write_dma;
251 u32 read_write_dma;
252 u32 link_changes;
253 u32 msg_enable;
254 unsigned int board_number;
255 int rebooted;
256 };
257
258 static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
259 static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
260 static char *myri10ge_fw_rss_unaligned = "myri10ge_rss_ethp_z8e.dat";
261 static char *myri10ge_fw_rss_aligned = "myri10ge_rss_eth_z8e.dat";
262 MODULE_FIRMWARE("myri10ge_ethp_z8e.dat");
263 MODULE_FIRMWARE("myri10ge_eth_z8e.dat");
264 MODULE_FIRMWARE("myri10ge_rss_ethp_z8e.dat");
265 MODULE_FIRMWARE("myri10ge_rss_eth_z8e.dat");
266
267 /* Careful: must be accessed under kernel_param_lock() */
268 static char *myri10ge_fw_name = NULL;
269 module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR);
270 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name");
271
272 #define MYRI10GE_MAX_BOARDS 8
273 static char *myri10ge_fw_names[MYRI10GE_MAX_BOARDS] =
274 {[0 ... (MYRI10GE_MAX_BOARDS - 1)] = NULL };
275 module_param_array_named(myri10ge_fw_names, myri10ge_fw_names, charp, NULL,
276 0444);
277 MODULE_PARM_DESC(myri10ge_fw_names, "Firmware image names per board");
278
279 static int myri10ge_ecrc_enable = 1;
280 module_param(myri10ge_ecrc_enable, int, S_IRUGO);
281 MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E");
282
283 static int myri10ge_small_bytes = -1; /* -1 == auto */
284 module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR);
285 MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets");
286
287 static int myri10ge_msi = 1; /* enable msi by default */
288 module_param(myri10ge_msi, int, S_IRUGO | S_IWUSR);
289 MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts");
290
291 static int myri10ge_intr_coal_delay = 75;
292 module_param(myri10ge_intr_coal_delay, int, S_IRUGO);
293 MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay");
294
295 static int myri10ge_flow_control = 1;
296 module_param(myri10ge_flow_control, int, S_IRUGO);
297 MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter");
298
299 static int myri10ge_deassert_wait = 1;
300 module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR);
301 MODULE_PARM_DESC(myri10ge_deassert_wait,
302 "Wait when deasserting legacy interrupts");
303
304 static int myri10ge_force_firmware = 0;
305 module_param(myri10ge_force_firmware, int, S_IRUGO);
306 MODULE_PARM_DESC(myri10ge_force_firmware,
307 "Force firmware to assume aligned completions");
308
309 static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
310 module_param(myri10ge_initial_mtu, int, S_IRUGO);
311 MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU");
312
313 static int myri10ge_napi_weight = 64;
314 module_param(myri10ge_napi_weight, int, S_IRUGO);
315 MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight");
316
317 static int myri10ge_watchdog_timeout = 1;
318 module_param(myri10ge_watchdog_timeout, int, S_IRUGO);
319 MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout");
320
321 static int myri10ge_max_irq_loops = 1048576;
322 module_param(myri10ge_max_irq_loops, int, S_IRUGO);
323 MODULE_PARM_DESC(myri10ge_max_irq_loops,
324 "Set stuck legacy IRQ detection threshold");
325
326 #define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK
327
328 static int myri10ge_debug = -1; /* defaults above */
329 module_param(myri10ge_debug, int, 0);
330 MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)");
331
332 static int myri10ge_fill_thresh = 256;
333 module_param(myri10ge_fill_thresh, int, S_IRUGO | S_IWUSR);
334 MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed");
335
336 static int myri10ge_reset_recover = 1;
337
338 static int myri10ge_max_slices = 1;
339 module_param(myri10ge_max_slices, int, S_IRUGO);
340 MODULE_PARM_DESC(myri10ge_max_slices, "Max tx/rx queues");
341
342 static int myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_DST_PORT;
343 module_param(myri10ge_rss_hash, int, S_IRUGO);
344 MODULE_PARM_DESC(myri10ge_rss_hash, "Type of RSS hashing to do");
345
346 static int myri10ge_dca = 1;
347 module_param(myri10ge_dca, int, S_IRUGO);
348 MODULE_PARM_DESC(myri10ge_dca, "Enable DCA if possible");
349
350 #define MYRI10GE_FW_OFFSET 1024*1024
351 #define MYRI10GE_HIGHPART_TO_U32(X) \
352 (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0)
353 #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X))
354
355 #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8)
356
357 static void myri10ge_set_multicast_list(struct net_device *dev);
358 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
359 struct net_device *dev);
360
361 static inline void put_be32(__be32 val, __be32 __iomem * p)
362 {
363 __raw_writel((__force __u32) val, (__force void __iomem *)p);
364 }
365
366 static void myri10ge_get_stats(struct net_device *dev,
367 struct rtnl_link_stats64 *stats);
368
369 static void set_fw_name(struct myri10ge_priv *mgp, char *name, bool allocated)
370 {
371 if (mgp->fw_name_allocated)
372 kfree(mgp->fw_name);
373 mgp->fw_name = name;
374 mgp->fw_name_allocated = allocated;
375 }
376
377 static int
378 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
379 struct myri10ge_cmd *data, int atomic)
380 {
381 struct mcp_cmd *buf;
382 char buf_bytes[sizeof(*buf) + 8];
383 struct mcp_cmd_response *response = mgp->cmd;
384 char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD;
385 u32 dma_low, dma_high, result, value;
386 int sleep_total = 0;
387
388 /* ensure buf is aligned to 8 bytes */
389 buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8);
390
391 buf->data0 = htonl(data->data0);
392 buf->data1 = htonl(data->data1);
393 buf->data2 = htonl(data->data2);
394 buf->cmd = htonl(cmd);
395 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
396 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
397
398 buf->response_addr.low = htonl(dma_low);
399 buf->response_addr.high = htonl(dma_high);
400 response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT);
401 mb();
402 myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf));
403
404 /* wait up to 15ms. Longest command is the DMA benchmark,
405 * which is capped at 5ms, but runs from a timeout handler
406 * that runs every 7.8ms. So a 15ms timeout leaves us with
407 * a 2.2ms margin
408 */
409 if (atomic) {
410 /* if atomic is set, do not sleep,
411 * and try to get the completion quickly
412 * (1ms will be enough for those commands) */
413 for (sleep_total = 0;
414 sleep_total < 1000 &&
415 response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
416 sleep_total += 10) {
417 udelay(10);
418 mb();
419 }
420 } else {
421 /* use msleep for most command */
422 for (sleep_total = 0;
423 sleep_total < 15 &&
424 response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
425 sleep_total++)
426 msleep(1);
427 }
428
429 result = ntohl(response->result);
430 value = ntohl(response->data);
431 if (result != MYRI10GE_NO_RESPONSE_RESULT) {
432 if (result == 0) {
433 data->data0 = value;
434 return 0;
435 } else if (result == MXGEFW_CMD_UNKNOWN) {
436 return -ENOSYS;
437 } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) {
438 return -E2BIG;
439 } else if (result == MXGEFW_CMD_ERROR_RANGE &&
440 cmd == MXGEFW_CMD_ENABLE_RSS_QUEUES &&
441 (data->
442 data1 & MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES) !=
443 0) {
444 return -ERANGE;
445 } else {
446 dev_err(&mgp->pdev->dev,
447 "command %d failed, result = %d\n",
448 cmd, result);
449 return -ENXIO;
450 }
451 }
452
453 dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
454 cmd, result);
455 return -EAGAIN;
456 }
457
458 /*
459 * The eeprom strings on the lanaiX have the format
460 * SN=x\0
461 * MAC=x:x:x:x:x:x\0
462 * PT:ddd mmm xx xx:xx:xx xx\0
463 * PV:ddd mmm xx xx:xx:xx xx\0
464 */
465 static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp)
466 {
467 char *ptr, *limit;
468 int i;
469
470 ptr = mgp->eeprom_strings;
471 limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE;
472
473 while (*ptr != '\0' && ptr < limit) {
474 if (memcmp(ptr, "MAC=", 4) == 0) {
475 ptr += 4;
476 mgp->mac_addr_string = ptr;
477 for (i = 0; i < 6; i++) {
478 if ((ptr + 2) > limit)
479 goto abort;
480 mgp->mac_addr[i] =
481 simple_strtoul(ptr, &ptr, 16);
482 ptr += 1;
483 }
484 }
485 if (memcmp(ptr, "PC=", 3) == 0) {
486 ptr += 3;
487 mgp->product_code_string = ptr;
488 }
489 if (memcmp((const void *)ptr, "SN=", 3) == 0) {
490 ptr += 3;
491 mgp->serial_number = simple_strtoul(ptr, &ptr, 10);
492 }
493 while (ptr < limit && *ptr++) ;
494 }
495
496 return 0;
497
498 abort:
499 dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n");
500 return -ENXIO;
501 }
502
503 /*
504 * Enable or disable periodic RDMAs from the host to make certain
505 * chipsets resend dropped PCIe messages
506 */
507
508 static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable)
509 {
510 char __iomem *submit;
511 __be32 buf[16] __attribute__ ((__aligned__(8)));
512 u32 dma_low, dma_high;
513 int i;
514
515 /* clear confirmation addr */
516 mgp->cmd->data = 0;
517 mb();
518
519 /* send a rdma command to the PCIe engine, and wait for the
520 * response in the confirmation address. The firmware should
521 * write a -1 there to indicate it is alive and well
522 */
523 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
524 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
525
526 buf[0] = htonl(dma_high); /* confirm addr MSW */
527 buf[1] = htonl(dma_low); /* confirm addr LSW */
528 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */
529 buf[3] = htonl(dma_high); /* dummy addr MSW */
530 buf[4] = htonl(dma_low); /* dummy addr LSW */
531 buf[5] = htonl(enable); /* enable? */
532
533 submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA;
534
535 myri10ge_pio_copy(submit, &buf, sizeof(buf));
536 for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++)
537 msleep(1);
538 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA)
539 dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n",
540 (enable ? "enable" : "disable"));
541 }
542
543 static int
544 myri10ge_validate_firmware(struct myri10ge_priv *mgp,
545 struct mcp_gen_header *hdr)
546 {
547 struct device *dev = &mgp->pdev->dev;
548
549 /* check firmware type */
550 if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) {
551 dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type));
552 return -EINVAL;
553 }
554
555 /* save firmware version for ethtool */
556 strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
557 mgp->fw_version[sizeof(mgp->fw_version) - 1] = '\0';
558
559 sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major,
560 &mgp->fw_ver_minor, &mgp->fw_ver_tiny);
561
562 if (!(mgp->fw_ver_major == MXGEFW_VERSION_MAJOR &&
563 mgp->fw_ver_minor == MXGEFW_VERSION_MINOR)) {
564 dev_err(dev, "Found firmware version %s\n", mgp->fw_version);
565 dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR,
566 MXGEFW_VERSION_MINOR);
567 return -EINVAL;
568 }
569 return 0;
570 }
571
572 static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
573 {
574 unsigned crc, reread_crc;
575 const struct firmware *fw;
576 struct device *dev = &mgp->pdev->dev;
577 unsigned char *fw_readback;
578 struct mcp_gen_header *hdr;
579 size_t hdr_offset;
580 int status;
581 unsigned i;
582
583 if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) {
584 dev_err(dev, "Unable to load %s firmware image via hotplug\n",
585 mgp->fw_name);
586 status = -EINVAL;
587 goto abort_with_nothing;
588 }
589
590 /* check size */
591
592 if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET ||
593 fw->size < MCP_HEADER_PTR_OFFSET + 4) {
594 dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size);
595 status = -EINVAL;
596 goto abort_with_fw;
597 }
598
599 /* check id */
600 hdr_offset = ntohl(*(__be32 *) (fw->data + MCP_HEADER_PTR_OFFSET));
601 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) {
602 dev_err(dev, "Bad firmware file\n");
603 status = -EINVAL;
604 goto abort_with_fw;
605 }
606 hdr = (void *)(fw->data + hdr_offset);
607
608 status = myri10ge_validate_firmware(mgp, hdr);
609 if (status != 0)
610 goto abort_with_fw;
611
612 crc = crc32(~0, fw->data, fw->size);
613 for (i = 0; i < fw->size; i += 256) {
614 myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i,
615 fw->data + i,
616 min(256U, (unsigned)(fw->size - i)));
617 mb();
618 readb(mgp->sram);
619 }
620 fw_readback = vmalloc(fw->size);
621 if (!fw_readback) {
622 status = -ENOMEM;
623 goto abort_with_fw;
624 }
625 /* corruption checking is good for parity recovery and buggy chipset */
626 memcpy_fromio(fw_readback, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);
627 reread_crc = crc32(~0, fw_readback, fw->size);
628 vfree(fw_readback);
629 if (crc != reread_crc) {
630 dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n",
631 (unsigned)fw->size, reread_crc, crc);
632 status = -EIO;
633 goto abort_with_fw;
634 }
635 *size = (u32) fw->size;
636
637 abort_with_fw:
638 release_firmware(fw);
639
640 abort_with_nothing:
641 return status;
642 }
643
644 static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp)
645 {
646 struct mcp_gen_header *hdr;
647 struct device *dev = &mgp->pdev->dev;
648 const size_t bytes = sizeof(struct mcp_gen_header);
649 size_t hdr_offset;
650 int status;
651
652 /* find running firmware header */
653 hdr_offset = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
654
655 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) {
656 dev_err(dev, "Running firmware has bad header offset (%d)\n",
657 (int)hdr_offset);
658 return -EIO;
659 }
660
661 /* copy header of running firmware from SRAM to host memory to
662 * validate firmware */
663 hdr = kmalloc(bytes, GFP_KERNEL);
664 if (hdr == NULL)
665 return -ENOMEM;
666
667 memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes);
668 status = myri10ge_validate_firmware(mgp, hdr);
669 kfree(hdr);
670
671 /* check to see if adopted firmware has bug where adopting
672 * it will cause broadcasts to be filtered unless the NIC
673 * is kept in ALLMULTI mode */
674 if (mgp->fw_ver_major == 1 && mgp->fw_ver_minor == 4 &&
675 mgp->fw_ver_tiny >= 4 && mgp->fw_ver_tiny <= 11) {
676 mgp->adopted_rx_filter_bug = 1;
677 dev_warn(dev, "Adopting fw %d.%d.%d: "
678 "working around rx filter bug\n",
679 mgp->fw_ver_major, mgp->fw_ver_minor,
680 mgp->fw_ver_tiny);
681 }
682 return status;
683 }
684
685 static int myri10ge_get_firmware_capabilities(struct myri10ge_priv *mgp)
686 {
687 struct myri10ge_cmd cmd;
688 int status;
689
690 /* probe for IPv6 TSO support */
691 mgp->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
692 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_TSO6_HDR_SIZE,
693 &cmd, 0);
694 if (status == 0) {
695 mgp->max_tso6 = cmd.data0;
696 mgp->features |= NETIF_F_TSO6;
697 }
698
699 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
700 if (status != 0) {
701 dev_err(&mgp->pdev->dev,
702 "failed MXGEFW_CMD_GET_RX_RING_SIZE\n");
703 return -ENXIO;
704 }
705
706 mgp->max_intr_slots = 2 * (cmd.data0 / sizeof(struct mcp_dma_addr));
707
708 return 0;
709 }
710
711 static int myri10ge_load_firmware(struct myri10ge_priv *mgp, int adopt)
712 {
713 char __iomem *submit;
714 __be32 buf[16] __attribute__ ((__aligned__(8)));
715 u32 dma_low, dma_high, size;
716 int status, i;
717
718 size = 0;
719 status = myri10ge_load_hotplug_firmware(mgp, &size);
720 if (status) {
721 if (!adopt)
722 return status;
723 dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n");
724
725 /* Do not attempt to adopt firmware if there
726 * was a bad crc */
727 if (status == -EIO)
728 return status;
729
730 status = myri10ge_adopt_running_firmware(mgp);
731 if (status != 0) {
732 dev_err(&mgp->pdev->dev,
733 "failed to adopt running firmware\n");
734 return status;
735 }
736 dev_info(&mgp->pdev->dev,
737 "Successfully adopted running firmware\n");
738 if (mgp->tx_boundary == 4096) {
739 dev_warn(&mgp->pdev->dev,
740 "Using firmware currently running on NIC"
741 ". For optimal\n");
742 dev_warn(&mgp->pdev->dev,
743 "performance consider loading optimized "
744 "firmware\n");
745 dev_warn(&mgp->pdev->dev, "via hotplug\n");
746 }
747
748 set_fw_name(mgp, "adopted", false);
749 mgp->tx_boundary = 2048;
750 myri10ge_dummy_rdma(mgp, 1);
751 status = myri10ge_get_firmware_capabilities(mgp);
752 return status;
753 }
754
755 /* clear confirmation addr */
756 mgp->cmd->data = 0;
757 mb();
758
759 /* send a reload command to the bootstrap MCP, and wait for the
760 * response in the confirmation address. The firmware should
761 * write a -1 there to indicate it is alive and well
762 */
763 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
764 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
765
766 buf[0] = htonl(dma_high); /* confirm addr MSW */
767 buf[1] = htonl(dma_low); /* confirm addr LSW */
768 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */
769
770 /* FIX: All newest firmware should un-protect the bottom of
771 * the sram before handoff. However, the very first interfaces
772 * do not. Therefore the handoff copy must skip the first 8 bytes
773 */
774 buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */
775 buf[4] = htonl(size - 8); /* length of code */
776 buf[5] = htonl(8); /* where to copy to */
777 buf[6] = htonl(0); /* where to jump to */
778
779 submit = mgp->sram + MXGEFW_BOOT_HANDOFF;
780
781 myri10ge_pio_copy(submit, &buf, sizeof(buf));
782 mb();
783 msleep(1);
784 mb();
785 i = 0;
786 while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 9) {
787 msleep(1 << i);
788 i++;
789 }
790 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) {
791 dev_err(&mgp->pdev->dev, "handoff failed\n");
792 return -ENXIO;
793 }
794 myri10ge_dummy_rdma(mgp, 1);
795 status = myri10ge_get_firmware_capabilities(mgp);
796
797 return status;
798 }
799
800 static int myri10ge_update_mac_address(struct myri10ge_priv *mgp, u8 * addr)
801 {
802 struct myri10ge_cmd cmd;
803 int status;
804
805 cmd.data0 = ((addr[0] << 24) | (addr[1] << 16)
806 | (addr[2] << 8) | addr[3]);
807
808 cmd.data1 = ((addr[4] << 8) | (addr[5]));
809
810 status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0);
811 return status;
812 }
813
814 static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause)
815 {
816 struct myri10ge_cmd cmd;
817 int status, ctl;
818
819 ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL;
820 status = myri10ge_send_cmd(mgp, ctl, &cmd, 0);
821
822 if (status) {
823 netdev_err(mgp->dev, "Failed to set flow control mode\n");
824 return status;
825 }
826 mgp->pause = pause;
827 return 0;
828 }
829
830 static void
831 myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic)
832 {
833 struct myri10ge_cmd cmd;
834 int status, ctl;
835
836 ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC;
837 status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic);
838 if (status)
839 netdev_err(mgp->dev, "Failed to set promisc mode\n");
840 }
841
842 static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type)
843 {
844 struct myri10ge_cmd cmd;
845 int status;
846 u32 len;
847 struct page *dmatest_page;
848 dma_addr_t dmatest_bus;
849 char *test = " ";
850
851 dmatest_page = alloc_page(GFP_KERNEL);
852 if (!dmatest_page)
853 return -ENOMEM;
854 dmatest_bus = pci_map_page(mgp->pdev, dmatest_page, 0, PAGE_SIZE,
855 DMA_BIDIRECTIONAL);
856 if (unlikely(pci_dma_mapping_error(mgp->pdev, dmatest_bus))) {
857 __free_page(dmatest_page);
858 return -ENOMEM;
859 }
860
861 /* Run a small DMA test.
862 * The magic multipliers to the length tell the firmware
863 * to do DMA read, write, or read+write tests. The
864 * results are returned in cmd.data0. The upper 16
865 * bits or the return is the number of transfers completed.
866 * The lower 16 bits is the time in 0.5us ticks that the
867 * transfers took to complete.
868 */
869
870 len = mgp->tx_boundary;
871
872 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
873 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
874 cmd.data2 = len * 0x10000;
875 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
876 if (status != 0) {
877 test = "read";
878 goto abort;
879 }
880 mgp->read_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
881 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
882 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
883 cmd.data2 = len * 0x1;
884 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
885 if (status != 0) {
886 test = "write";
887 goto abort;
888 }
889 mgp->write_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
890
891 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
892 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
893 cmd.data2 = len * 0x10001;
894 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
895 if (status != 0) {
896 test = "read/write";
897 goto abort;
898 }
899 mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) /
900 (cmd.data0 & 0xffff);
901
902 abort:
903 pci_unmap_page(mgp->pdev, dmatest_bus, PAGE_SIZE, DMA_BIDIRECTIONAL);
904 put_page(dmatest_page);
905
906 if (status != 0 && test_type != MXGEFW_CMD_UNALIGNED_TEST)
907 dev_warn(&mgp->pdev->dev, "DMA %s benchmark failed: %d\n",
908 test, status);
909
910 return status;
911 }
912
913 static int myri10ge_reset(struct myri10ge_priv *mgp)
914 {
915 struct myri10ge_cmd cmd;
916 struct myri10ge_slice_state *ss;
917 int i, status;
918 size_t bytes;
919 #ifdef CONFIG_MYRI10GE_DCA
920 unsigned long dca_tag_off;
921 #endif
922
923 /* try to send a reset command to the card to see if it
924 * is alive */
925 memset(&cmd, 0, sizeof(cmd));
926 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
927 if (status != 0) {
928 dev_err(&mgp->pdev->dev, "failed reset\n");
929 return -ENXIO;
930 }
931
932 (void)myri10ge_dma_test(mgp, MXGEFW_DMA_TEST);
933 /*
934 * Use non-ndis mcp_slot (eg, 4 bytes total,
935 * no toeplitz hash value returned. Older firmware will
936 * not understand this command, but will use the correct
937 * sized mcp_slot, so we ignore error returns
938 */
939 cmd.data0 = MXGEFW_RSS_MCP_SLOT_TYPE_MIN;
940 (void)myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_MCP_SLOT_TYPE, &cmd, 0);
941
942 /* Now exchange information about interrupts */
943
944 bytes = mgp->max_intr_slots * sizeof(*mgp->ss[0].rx_done.entry);
945 cmd.data0 = (u32) bytes;
946 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
947
948 /*
949 * Even though we already know how many slices are supported
950 * via myri10ge_probe_slices() MXGEFW_CMD_GET_MAX_RSS_QUEUES
951 * has magic side effects, and must be called after a reset.
952 * It must be called prior to calling any RSS related cmds,
953 * including assigning an interrupt queue for anything but
954 * slice 0. It must also be called *after*
955 * MXGEFW_CMD_SET_INTRQ_SIZE, since the intrq size is used by
956 * the firmware to compute offsets.
957 */
958
959 if (mgp->num_slices > 1) {
960
961 /* ask the maximum number of slices it supports */
962 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES,
963 &cmd, 0);
964 if (status != 0) {
965 dev_err(&mgp->pdev->dev,
966 "failed to get number of slices\n");
967 }
968
969 /*
970 * MXGEFW_CMD_ENABLE_RSS_QUEUES must be called prior
971 * to setting up the interrupt queue DMA
972 */
973
974 cmd.data0 = mgp->num_slices;
975 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
976 if (mgp->dev->real_num_tx_queues > 1)
977 cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
978 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
979 &cmd, 0);
980
981 /* Firmware older than 1.4.32 only supports multiple
982 * RX queues, so if we get an error, first retry using a
983 * single TX queue before giving up */
984 if (status != 0 && mgp->dev->real_num_tx_queues > 1) {
985 netif_set_real_num_tx_queues(mgp->dev, 1);
986 cmd.data0 = mgp->num_slices;
987 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
988 status = myri10ge_send_cmd(mgp,
989 MXGEFW_CMD_ENABLE_RSS_QUEUES,
990 &cmd, 0);
991 }
992
993 if (status != 0) {
994 dev_err(&mgp->pdev->dev,
995 "failed to set number of slices\n");
996
997 return status;
998 }
999 }
1000 for (i = 0; i < mgp->num_slices; i++) {
1001 ss = &mgp->ss[i];
1002 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->rx_done.bus);
1003 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->rx_done.bus);
1004 cmd.data2 = i;
1005 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA,
1006 &cmd, 0);
1007 }
1008
1009 status |=
1010 myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0);
1011 for (i = 0; i < mgp->num_slices; i++) {
1012 ss = &mgp->ss[i];
1013 ss->irq_claim =
1014 (__iomem __be32 *) (mgp->sram + cmd.data0 + 8 * i);
1015 }
1016 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET,
1017 &cmd, 0);
1018 mgp->irq_deassert = (__iomem __be32 *) (mgp->sram + cmd.data0);
1019
1020 status |= myri10ge_send_cmd
1021 (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0);
1022 mgp->intr_coal_delay_ptr = (__iomem __be32 *) (mgp->sram + cmd.data0);
1023 if (status != 0) {
1024 dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n");
1025 return status;
1026 }
1027 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1028
1029 #ifdef CONFIG_MYRI10GE_DCA
1030 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_DCA_OFFSET, &cmd, 0);
1031 dca_tag_off = cmd.data0;
1032 for (i = 0; i < mgp->num_slices; i++) {
1033 ss = &mgp->ss[i];
1034 if (status == 0) {
1035 ss->dca_tag = (__iomem __be32 *)
1036 (mgp->sram + dca_tag_off + 4 * i);
1037 } else {
1038 ss->dca_tag = NULL;
1039 }
1040 }
1041 #endif /* CONFIG_MYRI10GE_DCA */
1042
1043 /* reset mcp/driver shared state back to 0 */
1044
1045 mgp->link_changes = 0;
1046 for (i = 0; i < mgp->num_slices; i++) {
1047 ss = &mgp->ss[i];
1048
1049 memset(ss->rx_done.entry, 0, bytes);
1050 ss->tx.req = 0;
1051 ss->tx.done = 0;
1052 ss->tx.pkt_start = 0;
1053 ss->tx.pkt_done = 0;
1054 ss->rx_big.cnt = 0;
1055 ss->rx_small.cnt = 0;
1056 ss->rx_done.idx = 0;
1057 ss->rx_done.cnt = 0;
1058 ss->tx.wake_queue = 0;
1059 ss->tx.stop_queue = 0;
1060 }
1061
1062 status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr);
1063 myri10ge_change_pause(mgp, mgp->pause);
1064 myri10ge_set_multicast_list(mgp->dev);
1065 return status;
1066 }
1067
1068 #ifdef CONFIG_MYRI10GE_DCA
1069 static int myri10ge_toggle_relaxed(struct pci_dev *pdev, int on)
1070 {
1071 int ret;
1072 u16 ctl;
1073
1074 pcie_capability_read_word(pdev, PCI_EXP_DEVCTL, &ctl);
1075
1076 ret = (ctl & PCI_EXP_DEVCTL_RELAX_EN) >> 4;
1077 if (ret != on) {
1078 ctl &= ~PCI_EXP_DEVCTL_RELAX_EN;
1079 ctl |= (on << 4);
1080 pcie_capability_write_word(pdev, PCI_EXP_DEVCTL, ctl);
1081 }
1082 return ret;
1083 }
1084
1085 static void
1086 myri10ge_write_dca(struct myri10ge_slice_state *ss, int cpu, int tag)
1087 {
1088 ss->cached_dca_tag = tag;
1089 put_be32(htonl(tag), ss->dca_tag);
1090 }
1091
1092 static inline void myri10ge_update_dca(struct myri10ge_slice_state *ss)
1093 {
1094 int cpu = get_cpu();
1095 int tag;
1096
1097 if (cpu != ss->cpu) {
1098 tag = dca3_get_tag(&ss->mgp->pdev->dev, cpu);
1099 if (ss->cached_dca_tag != tag)
1100 myri10ge_write_dca(ss, cpu, tag);
1101 ss->cpu = cpu;
1102 }
1103 put_cpu();
1104 }
1105
1106 static void myri10ge_setup_dca(struct myri10ge_priv *mgp)
1107 {
1108 int err, i;
1109 struct pci_dev *pdev = mgp->pdev;
1110
1111 if (mgp->ss[0].dca_tag == NULL || mgp->dca_enabled)
1112 return;
1113 if (!myri10ge_dca) {
1114 dev_err(&pdev->dev, "dca disabled by administrator\n");
1115 return;
1116 }
1117 err = dca_add_requester(&pdev->dev);
1118 if (err) {
1119 if (err != -ENODEV)
1120 dev_err(&pdev->dev,
1121 "dca_add_requester() failed, err=%d\n", err);
1122 return;
1123 }
1124 mgp->relaxed_order = myri10ge_toggle_relaxed(pdev, 0);
1125 mgp->dca_enabled = 1;
1126 for (i = 0; i < mgp->num_slices; i++) {
1127 mgp->ss[i].cpu = -1;
1128 mgp->ss[i].cached_dca_tag = -1;
1129 myri10ge_update_dca(&mgp->ss[i]);
1130 }
1131 }
1132
1133 static void myri10ge_teardown_dca(struct myri10ge_priv *mgp)
1134 {
1135 struct pci_dev *pdev = mgp->pdev;
1136
1137 if (!mgp->dca_enabled)
1138 return;
1139 mgp->dca_enabled = 0;
1140 if (mgp->relaxed_order)
1141 myri10ge_toggle_relaxed(pdev, 1);
1142 dca_remove_requester(&pdev->dev);
1143 }
1144
1145 static int myri10ge_notify_dca_device(struct device *dev, void *data)
1146 {
1147 struct myri10ge_priv *mgp;
1148 unsigned long event;
1149
1150 mgp = dev_get_drvdata(dev);
1151 event = *(unsigned long *)data;
1152
1153 if (event == DCA_PROVIDER_ADD)
1154 myri10ge_setup_dca(mgp);
1155 else if (event == DCA_PROVIDER_REMOVE)
1156 myri10ge_teardown_dca(mgp);
1157 return 0;
1158 }
1159 #endif /* CONFIG_MYRI10GE_DCA */
1160
1161 static inline void
1162 myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst,
1163 struct mcp_kreq_ether_recv *src)
1164 {
1165 __be32 low;
1166
1167 low = src->addr_low;
1168 src->addr_low = htonl(DMA_BIT_MASK(32));
1169 myri10ge_pio_copy(dst, src, 4 * sizeof(*src));
1170 mb();
1171 myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src));
1172 mb();
1173 src->addr_low = low;
1174 put_be32(low, &dst->addr_low);
1175 mb();
1176 }
1177
1178 static inline void myri10ge_vlan_ip_csum(struct sk_buff *skb, __wsum hw_csum)
1179 {
1180 struct vlan_hdr *vh = (struct vlan_hdr *)(skb->data);
1181
1182 if ((skb->protocol == htons(ETH_P_8021Q)) &&
1183 (vh->h_vlan_encapsulated_proto == htons(ETH_P_IP) ||
1184 vh->h_vlan_encapsulated_proto == htons(ETH_P_IPV6))) {
1185 skb->csum = hw_csum;
1186 skb->ip_summed = CHECKSUM_COMPLETE;
1187 }
1188 }
1189
1190 static void
1191 myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
1192 int bytes, int watchdog)
1193 {
1194 struct page *page;
1195 dma_addr_t bus;
1196 int idx;
1197 #if MYRI10GE_ALLOC_SIZE > 4096
1198 int end_offset;
1199 #endif
1200
1201 if (unlikely(rx->watchdog_needed && !watchdog))
1202 return;
1203
1204 /* try to refill entire ring */
1205 while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) {
1206 idx = rx->fill_cnt & rx->mask;
1207 if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) {
1208 /* we can use part of previous page */
1209 get_page(rx->page);
1210 } else {
1211 /* we need a new page */
1212 page =
1213 alloc_pages(GFP_ATOMIC | __GFP_COMP,
1214 MYRI10GE_ALLOC_ORDER);
1215 if (unlikely(page == NULL)) {
1216 if (rx->fill_cnt - rx->cnt < 16)
1217 rx->watchdog_needed = 1;
1218 return;
1219 }
1220
1221 bus = pci_map_page(mgp->pdev, page, 0,
1222 MYRI10GE_ALLOC_SIZE,
1223 PCI_DMA_FROMDEVICE);
1224 if (unlikely(pci_dma_mapping_error(mgp->pdev, bus))) {
1225 __free_pages(page, MYRI10GE_ALLOC_ORDER);
1226 if (rx->fill_cnt - rx->cnt < 16)
1227 rx->watchdog_needed = 1;
1228 return;
1229 }
1230
1231 rx->page = page;
1232 rx->page_offset = 0;
1233 rx->bus = bus;
1234
1235 }
1236 rx->info[idx].page = rx->page;
1237 rx->info[idx].page_offset = rx->page_offset;
1238 /* note that this is the address of the start of the
1239 * page */
1240 dma_unmap_addr_set(&rx->info[idx], bus, rx->bus);
1241 rx->shadow[idx].addr_low =
1242 htonl(MYRI10GE_LOWPART_TO_U32(rx->bus) + rx->page_offset);
1243 rx->shadow[idx].addr_high =
1244 htonl(MYRI10GE_HIGHPART_TO_U32(rx->bus));
1245
1246 /* start next packet on a cacheline boundary */
1247 rx->page_offset += SKB_DATA_ALIGN(bytes);
1248
1249 #if MYRI10GE_ALLOC_SIZE > 4096
1250 /* don't cross a 4KB boundary */
1251 end_offset = rx->page_offset + bytes - 1;
1252 if ((unsigned)(rx->page_offset ^ end_offset) > 4095)
1253 rx->page_offset = end_offset & ~4095;
1254 #endif
1255 rx->fill_cnt++;
1256
1257 /* copy 8 descriptors to the firmware at a time */
1258 if ((idx & 7) == 7) {
1259 myri10ge_submit_8rx(&rx->lanai[idx - 7],
1260 &rx->shadow[idx - 7]);
1261 }
1262 }
1263 }
1264
1265 static inline void
1266 myri10ge_unmap_rx_page(struct pci_dev *pdev,
1267 struct myri10ge_rx_buffer_state *info, int bytes)
1268 {
1269 /* unmap the recvd page if we're the only or last user of it */
1270 if (bytes >= MYRI10GE_ALLOC_SIZE / 2 ||
1271 (info->page_offset + 2 * bytes) > MYRI10GE_ALLOC_SIZE) {
1272 pci_unmap_page(pdev, (dma_unmap_addr(info, bus)
1273 & ~(MYRI10GE_ALLOC_SIZE - 1)),
1274 MYRI10GE_ALLOC_SIZE, PCI_DMA_FROMDEVICE);
1275 }
1276 }
1277
1278 /*
1279 * GRO does not support acceleration of tagged vlan frames, and
1280 * this NIC does not support vlan tag offload, so we must pop
1281 * the tag ourselves to be able to achieve GRO performance that
1282 * is comparable to LRO.
1283 */
1284
1285 static inline void
1286 myri10ge_vlan_rx(struct net_device *dev, void *addr, struct sk_buff *skb)
1287 {
1288 u8 *va;
1289 struct vlan_ethhdr *veh;
1290 struct skb_frag_struct *frag;
1291 __wsum vsum;
1292
1293 va = addr;
1294 va += MXGEFW_PAD;
1295 veh = (struct vlan_ethhdr *)va;
1296 if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) ==
1297 NETIF_F_HW_VLAN_CTAG_RX &&
1298 veh->h_vlan_proto == htons(ETH_P_8021Q)) {
1299 /* fixup csum if needed */
1300 if (skb->ip_summed == CHECKSUM_COMPLETE) {
1301 vsum = csum_partial(va + ETH_HLEN, VLAN_HLEN, 0);
1302 skb->csum = csum_sub(skb->csum, vsum);
1303 }
1304 /* pop tag */
1305 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ntohs(veh->h_vlan_TCI));
1306 memmove(va + VLAN_HLEN, va, 2 * ETH_ALEN);
1307 skb->len -= VLAN_HLEN;
1308 skb->data_len -= VLAN_HLEN;
1309 frag = skb_shinfo(skb)->frags;
1310 frag->page_offset += VLAN_HLEN;
1311 skb_frag_size_set(frag, skb_frag_size(frag) - VLAN_HLEN);
1312 }
1313 }
1314
1315 #define MYRI10GE_HLEN 64 /* Bytes to copy from page to skb linear memory */
1316
1317 static inline int
1318 myri10ge_rx_done(struct myri10ge_slice_state *ss, int len, __wsum csum)
1319 {
1320 struct myri10ge_priv *mgp = ss->mgp;
1321 struct sk_buff *skb;
1322 struct skb_frag_struct *rx_frags;
1323 struct myri10ge_rx_buf *rx;
1324 int i, idx, remainder, bytes;
1325 struct pci_dev *pdev = mgp->pdev;
1326 struct net_device *dev = mgp->dev;
1327 u8 *va;
1328
1329 if (len <= mgp->small_bytes) {
1330 rx = &ss->rx_small;
1331 bytes = mgp->small_bytes;
1332 } else {
1333 rx = &ss->rx_big;
1334 bytes = mgp->big_bytes;
1335 }
1336
1337 len += MXGEFW_PAD;
1338 idx = rx->cnt & rx->mask;
1339 va = page_address(rx->info[idx].page) + rx->info[idx].page_offset;
1340 prefetch(va);
1341
1342 skb = napi_get_frags(&ss->napi);
1343 if (unlikely(skb == NULL)) {
1344 ss->stats.rx_dropped++;
1345 for (i = 0, remainder = len; remainder > 0; i++) {
1346 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1347 put_page(rx->info[idx].page);
1348 rx->cnt++;
1349 idx = rx->cnt & rx->mask;
1350 remainder -= MYRI10GE_ALLOC_SIZE;
1351 }
1352 return 0;
1353 }
1354 rx_frags = skb_shinfo(skb)->frags;
1355 /* Fill skb_frag_struct(s) with data from our receive */
1356 for (i = 0, remainder = len; remainder > 0; i++) {
1357 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1358 skb_fill_page_desc(skb, i, rx->info[idx].page,
1359 rx->info[idx].page_offset,
1360 remainder < MYRI10GE_ALLOC_SIZE ?
1361 remainder : MYRI10GE_ALLOC_SIZE);
1362 rx->cnt++;
1363 idx = rx->cnt & rx->mask;
1364 remainder -= MYRI10GE_ALLOC_SIZE;
1365 }
1366
1367 /* remove padding */
1368 rx_frags[0].page_offset += MXGEFW_PAD;
1369 rx_frags[0].size -= MXGEFW_PAD;
1370 len -= MXGEFW_PAD;
1371
1372 skb->len = len;
1373 skb->data_len = len;
1374 skb->truesize += len;
1375 if (dev->features & NETIF_F_RXCSUM) {
1376 skb->ip_summed = CHECKSUM_COMPLETE;
1377 skb->csum = csum;
1378 }
1379 myri10ge_vlan_rx(mgp->dev, va, skb);
1380 skb_record_rx_queue(skb, ss - &mgp->ss[0]);
1381
1382 napi_gro_frags(&ss->napi);
1383
1384 return 1;
1385 }
1386
1387 static inline void
1388 myri10ge_tx_done(struct myri10ge_slice_state *ss, int mcp_index)
1389 {
1390 struct pci_dev *pdev = ss->mgp->pdev;
1391 struct myri10ge_tx_buf *tx = &ss->tx;
1392 struct netdev_queue *dev_queue;
1393 struct sk_buff *skb;
1394 int idx, len;
1395
1396 while (tx->pkt_done != mcp_index) {
1397 idx = tx->done & tx->mask;
1398 skb = tx->info[idx].skb;
1399
1400 /* Mark as free */
1401 tx->info[idx].skb = NULL;
1402 if (tx->info[idx].last) {
1403 tx->pkt_done++;
1404 tx->info[idx].last = 0;
1405 }
1406 tx->done++;
1407 len = dma_unmap_len(&tx->info[idx], len);
1408 dma_unmap_len_set(&tx->info[idx], len, 0);
1409 if (skb) {
1410 ss->stats.tx_bytes += skb->len;
1411 ss->stats.tx_packets++;
1412 dev_kfree_skb_irq(skb);
1413 if (len)
1414 pci_unmap_single(pdev,
1415 dma_unmap_addr(&tx->info[idx],
1416 bus), len,
1417 PCI_DMA_TODEVICE);
1418 } else {
1419 if (len)
1420 pci_unmap_page(pdev,
1421 dma_unmap_addr(&tx->info[idx],
1422 bus), len,
1423 PCI_DMA_TODEVICE);
1424 }
1425 }
1426
1427 dev_queue = netdev_get_tx_queue(ss->dev, ss - ss->mgp->ss);
1428 /*
1429 * Make a minimal effort to prevent the NIC from polling an
1430 * idle tx queue. If we can't get the lock we leave the queue
1431 * active. In this case, either a thread was about to start
1432 * using the queue anyway, or we lost a race and the NIC will
1433 * waste some of its resources polling an inactive queue for a
1434 * while.
1435 */
1436
1437 if ((ss->mgp->dev->real_num_tx_queues > 1) &&
1438 __netif_tx_trylock(dev_queue)) {
1439 if (tx->req == tx->done) {
1440 tx->queue_active = 0;
1441 put_be32(htonl(1), tx->send_stop);
1442 mb();
1443 mmiowb();
1444 }
1445 __netif_tx_unlock(dev_queue);
1446 }
1447
1448 /* start the queue if we've stopped it */
1449 if (netif_tx_queue_stopped(dev_queue) &&
1450 tx->req - tx->done < (tx->mask >> 1) &&
1451 ss->mgp->running == MYRI10GE_ETH_RUNNING) {
1452 tx->wake_queue++;
1453 netif_tx_wake_queue(dev_queue);
1454 }
1455 }
1456
1457 static inline int
1458 myri10ge_clean_rx_done(struct myri10ge_slice_state *ss, int budget)
1459 {
1460 struct myri10ge_rx_done *rx_done = &ss->rx_done;
1461 struct myri10ge_priv *mgp = ss->mgp;
1462 unsigned long rx_bytes = 0;
1463 unsigned long rx_packets = 0;
1464 unsigned long rx_ok;
1465 int idx = rx_done->idx;
1466 int cnt = rx_done->cnt;
1467 int work_done = 0;
1468 u16 length;
1469 __wsum checksum;
1470
1471 while (rx_done->entry[idx].length != 0 && work_done < budget) {
1472 length = ntohs(rx_done->entry[idx].length);
1473 rx_done->entry[idx].length = 0;
1474 checksum = csum_unfold(rx_done->entry[idx].checksum);
1475 rx_ok = myri10ge_rx_done(ss, length, checksum);
1476 rx_packets += rx_ok;
1477 rx_bytes += rx_ok * (unsigned long)length;
1478 cnt++;
1479 idx = cnt & (mgp->max_intr_slots - 1);
1480 work_done++;
1481 }
1482 rx_done->idx = idx;
1483 rx_done->cnt = cnt;
1484 ss->stats.rx_packets += rx_packets;
1485 ss->stats.rx_bytes += rx_bytes;
1486
1487 /* restock receive rings if needed */
1488 if (ss->rx_small.fill_cnt - ss->rx_small.cnt < myri10ge_fill_thresh)
1489 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
1490 mgp->small_bytes + MXGEFW_PAD, 0);
1491 if (ss->rx_big.fill_cnt - ss->rx_big.cnt < myri10ge_fill_thresh)
1492 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
1493
1494 return work_done;
1495 }
1496
1497 static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
1498 {
1499 struct mcp_irq_data *stats = mgp->ss[0].fw_stats;
1500
1501 if (unlikely(stats->stats_updated)) {
1502 unsigned link_up = ntohl(stats->link_up);
1503 if (mgp->link_state != link_up) {
1504 mgp->link_state = link_up;
1505
1506 if (mgp->link_state == MXGEFW_LINK_UP) {
1507 netif_info(mgp, link, mgp->dev, "link up\n");
1508 netif_carrier_on(mgp->dev);
1509 mgp->link_changes++;
1510 } else {
1511 netif_info(mgp, link, mgp->dev, "link %s\n",
1512 (link_up == MXGEFW_LINK_MYRINET ?
1513 "mismatch (Myrinet detected)" :
1514 "down"));
1515 netif_carrier_off(mgp->dev);
1516 mgp->link_changes++;
1517 }
1518 }
1519 if (mgp->rdma_tags_available !=
1520 ntohl(stats->rdma_tags_available)) {
1521 mgp->rdma_tags_available =
1522 ntohl(stats->rdma_tags_available);
1523 netdev_warn(mgp->dev, "RDMA timed out! %d tags left\n",
1524 mgp->rdma_tags_available);
1525 }
1526 mgp->down_cnt += stats->link_down;
1527 if (stats->link_down)
1528 wake_up(&mgp->down_wq);
1529 }
1530 }
1531
1532 static int myri10ge_poll(struct napi_struct *napi, int budget)
1533 {
1534 struct myri10ge_slice_state *ss =
1535 container_of(napi, struct myri10ge_slice_state, napi);
1536 int work_done;
1537
1538 #ifdef CONFIG_MYRI10GE_DCA
1539 if (ss->mgp->dca_enabled)
1540 myri10ge_update_dca(ss);
1541 #endif
1542 /* process as many rx events as NAPI will allow */
1543 work_done = myri10ge_clean_rx_done(ss, budget);
1544
1545 if (work_done < budget) {
1546 napi_complete_done(napi, work_done);
1547 put_be32(htonl(3), ss->irq_claim);
1548 }
1549 return work_done;
1550 }
1551
1552 static irqreturn_t myri10ge_intr(int irq, void *arg)
1553 {
1554 struct myri10ge_slice_state *ss = arg;
1555 struct myri10ge_priv *mgp = ss->mgp;
1556 struct mcp_irq_data *stats = ss->fw_stats;
1557 struct myri10ge_tx_buf *tx = &ss->tx;
1558 u32 send_done_count;
1559 int i;
1560
1561 /* an interrupt on a non-zero receive-only slice is implicitly
1562 * valid since MSI-X irqs are not shared */
1563 if ((mgp->dev->real_num_tx_queues == 1) && (ss != mgp->ss)) {
1564 napi_schedule(&ss->napi);
1565 return IRQ_HANDLED;
1566 }
1567
1568 /* make sure it is our IRQ, and that the DMA has finished */
1569 if (unlikely(!stats->valid))
1570 return IRQ_NONE;
1571
1572 /* low bit indicates receives are present, so schedule
1573 * napi poll handler */
1574 if (stats->valid & 1)
1575 napi_schedule(&ss->napi);
1576
1577 if (!mgp->msi_enabled && !mgp->msix_enabled) {
1578 put_be32(0, mgp->irq_deassert);
1579 if (!myri10ge_deassert_wait)
1580 stats->valid = 0;
1581 mb();
1582 } else
1583 stats->valid = 0;
1584
1585 /* Wait for IRQ line to go low, if using INTx */
1586 i = 0;
1587 while (1) {
1588 i++;
1589 /* check for transmit completes and receives */
1590 send_done_count = ntohl(stats->send_done_count);
1591 if (send_done_count != tx->pkt_done)
1592 myri10ge_tx_done(ss, (int)send_done_count);
1593 if (unlikely(i > myri10ge_max_irq_loops)) {
1594 netdev_warn(mgp->dev, "irq stuck?\n");
1595 stats->valid = 0;
1596 schedule_work(&mgp->watchdog_work);
1597 }
1598 if (likely(stats->valid == 0))
1599 break;
1600 cpu_relax();
1601 barrier();
1602 }
1603
1604 /* Only slice 0 updates stats */
1605 if (ss == mgp->ss)
1606 myri10ge_check_statblock(mgp);
1607
1608 put_be32(htonl(3), ss->irq_claim + 1);
1609 return IRQ_HANDLED;
1610 }
1611
1612 static int
1613 myri10ge_get_link_ksettings(struct net_device *netdev,
1614 struct ethtool_link_ksettings *cmd)
1615 {
1616 struct myri10ge_priv *mgp = netdev_priv(netdev);
1617 char *ptr;
1618 int i;
1619
1620 cmd->base.autoneg = AUTONEG_DISABLE;
1621 cmd->base.speed = SPEED_10000;
1622 cmd->base.duplex = DUPLEX_FULL;
1623
1624 /*
1625 * parse the product code to deterimine the interface type
1626 * (CX4, XFP, Quad Ribbon Fiber) by looking at the character
1627 * after the 3rd dash in the driver's cached copy of the
1628 * EEPROM's product code string.
1629 */
1630 ptr = mgp->product_code_string;
1631 if (ptr == NULL) {
1632 netdev_err(netdev, "Missing product code\n");
1633 return 0;
1634 }
1635 for (i = 0; i < 3; i++, ptr++) {
1636 ptr = strchr(ptr, '-');
1637 if (ptr == NULL) {
1638 netdev_err(netdev, "Invalid product code %s\n",
1639 mgp->product_code_string);
1640 return 0;
1641 }
1642 }
1643 if (*ptr == '2')
1644 ptr++;
1645 if (*ptr == 'R' || *ptr == 'Q' || *ptr == 'S') {
1646 /* We've found either an XFP, quad ribbon fiber, or SFP+ */
1647 cmd->base.port = PORT_FIBRE;
1648 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
1649 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
1650 } else {
1651 cmd->base.port = PORT_OTHER;
1652 }
1653
1654 return 0;
1655 }
1656
1657 static void
1658 myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
1659 {
1660 struct myri10ge_priv *mgp = netdev_priv(netdev);
1661
1662 strlcpy(info->driver, "myri10ge", sizeof(info->driver));
1663 strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version));
1664 strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version));
1665 strlcpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info));
1666 }
1667
1668 static int
1669 myri10ge_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1670 {
1671 struct myri10ge_priv *mgp = netdev_priv(netdev);
1672
1673 coal->rx_coalesce_usecs = mgp->intr_coal_delay;
1674 return 0;
1675 }
1676
1677 static int
1678 myri10ge_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1679 {
1680 struct myri10ge_priv *mgp = netdev_priv(netdev);
1681
1682 mgp->intr_coal_delay = coal->rx_coalesce_usecs;
1683 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1684 return 0;
1685 }
1686
1687 static void
1688 myri10ge_get_pauseparam(struct net_device *netdev,
1689 struct ethtool_pauseparam *pause)
1690 {
1691 struct myri10ge_priv *mgp = netdev_priv(netdev);
1692
1693 pause->autoneg = 0;
1694 pause->rx_pause = mgp->pause;
1695 pause->tx_pause = mgp->pause;
1696 }
1697
1698 static int
1699 myri10ge_set_pauseparam(struct net_device *netdev,
1700 struct ethtool_pauseparam *pause)
1701 {
1702 struct myri10ge_priv *mgp = netdev_priv(netdev);
1703
1704 if (pause->tx_pause != mgp->pause)
1705 return myri10ge_change_pause(mgp, pause->tx_pause);
1706 if (pause->rx_pause != mgp->pause)
1707 return myri10ge_change_pause(mgp, pause->rx_pause);
1708 if (pause->autoneg != 0)
1709 return -EINVAL;
1710 return 0;
1711 }
1712
1713 static void
1714 myri10ge_get_ringparam(struct net_device *netdev,
1715 struct ethtool_ringparam *ring)
1716 {
1717 struct myri10ge_priv *mgp = netdev_priv(netdev);
1718
1719 ring->rx_mini_max_pending = mgp->ss[0].rx_small.mask + 1;
1720 ring->rx_max_pending = mgp->ss[0].rx_big.mask + 1;
1721 ring->rx_jumbo_max_pending = 0;
1722 ring->tx_max_pending = mgp->ss[0].tx.mask + 1;
1723 ring->rx_mini_pending = ring->rx_mini_max_pending;
1724 ring->rx_pending = ring->rx_max_pending;
1725 ring->rx_jumbo_pending = ring->rx_jumbo_max_pending;
1726 ring->tx_pending = ring->tx_max_pending;
1727 }
1728
1729 static const char myri10ge_gstrings_main_stats[][ETH_GSTRING_LEN] = {
1730 "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
1731 "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
1732 "rx_length_errors", "rx_over_errors", "rx_crc_errors",
1733 "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
1734 "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
1735 "tx_heartbeat_errors", "tx_window_errors",
1736 /* device-specific stats */
1737 "tx_boundary", "irq", "MSI", "MSIX",
1738 "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
1739 "serial_number", "watchdog_resets",
1740 #ifdef CONFIG_MYRI10GE_DCA
1741 "dca_capable_firmware", "dca_device_present",
1742 #endif
1743 "link_changes", "link_up", "dropped_link_overflow",
1744 "dropped_link_error_or_filtered",
1745 "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32",
1746 "dropped_unicast_filtered", "dropped_multicast_filtered",
1747 "dropped_runt", "dropped_overrun", "dropped_no_small_buffer",
1748 "dropped_no_big_buffer"
1749 };
1750
1751 static const char myri10ge_gstrings_slice_stats[][ETH_GSTRING_LEN] = {
1752 "----------- slice ---------",
1753 "tx_pkt_start", "tx_pkt_done", "tx_req", "tx_done",
1754 "rx_small_cnt", "rx_big_cnt",
1755 "wake_queue", "stop_queue", "tx_linearized",
1756 };
1757
1758 #define MYRI10GE_NET_STATS_LEN 21
1759 #define MYRI10GE_MAIN_STATS_LEN ARRAY_SIZE(myri10ge_gstrings_main_stats)
1760 #define MYRI10GE_SLICE_STATS_LEN ARRAY_SIZE(myri10ge_gstrings_slice_stats)
1761
1762 static void
1763 myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
1764 {
1765 struct myri10ge_priv *mgp = netdev_priv(netdev);
1766 int i;
1767
1768 switch (stringset) {
1769 case ETH_SS_STATS:
1770 memcpy(data, *myri10ge_gstrings_main_stats,
1771 sizeof(myri10ge_gstrings_main_stats));
1772 data += sizeof(myri10ge_gstrings_main_stats);
1773 for (i = 0; i < mgp->num_slices; i++) {
1774 memcpy(data, *myri10ge_gstrings_slice_stats,
1775 sizeof(myri10ge_gstrings_slice_stats));
1776 data += sizeof(myri10ge_gstrings_slice_stats);
1777 }
1778 break;
1779 }
1780 }
1781
1782 static int myri10ge_get_sset_count(struct net_device *netdev, int sset)
1783 {
1784 struct myri10ge_priv *mgp = netdev_priv(netdev);
1785
1786 switch (sset) {
1787 case ETH_SS_STATS:
1788 return MYRI10GE_MAIN_STATS_LEN +
1789 mgp->num_slices * MYRI10GE_SLICE_STATS_LEN;
1790 default:
1791 return -EOPNOTSUPP;
1792 }
1793 }
1794
1795 static void
1796 myri10ge_get_ethtool_stats(struct net_device *netdev,
1797 struct ethtool_stats *stats, u64 * data)
1798 {
1799 struct myri10ge_priv *mgp = netdev_priv(netdev);
1800 struct myri10ge_slice_state *ss;
1801 struct rtnl_link_stats64 link_stats;
1802 int slice;
1803 int i;
1804
1805 /* force stats update */
1806 memset(&link_stats, 0, sizeof(link_stats));
1807 (void)myri10ge_get_stats(netdev, &link_stats);
1808 for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++)
1809 data[i] = ((u64 *)&link_stats)[i];
1810
1811 data[i++] = (unsigned int)mgp->tx_boundary;
1812 data[i++] = (unsigned int)mgp->pdev->irq;
1813 data[i++] = (unsigned int)mgp->msi_enabled;
1814 data[i++] = (unsigned int)mgp->msix_enabled;
1815 data[i++] = (unsigned int)mgp->read_dma;
1816 data[i++] = (unsigned int)mgp->write_dma;
1817 data[i++] = (unsigned int)mgp->read_write_dma;
1818 data[i++] = (unsigned int)mgp->serial_number;
1819 data[i++] = (unsigned int)mgp->watchdog_resets;
1820 #ifdef CONFIG_MYRI10GE_DCA
1821 data[i++] = (unsigned int)(mgp->ss[0].dca_tag != NULL);
1822 data[i++] = (unsigned int)(mgp->dca_enabled);
1823 #endif
1824 data[i++] = (unsigned int)mgp->link_changes;
1825
1826 /* firmware stats are useful only in the first slice */
1827 ss = &mgp->ss[0];
1828 data[i++] = (unsigned int)ntohl(ss->fw_stats->link_up);
1829 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_link_overflow);
1830 data[i++] =
1831 (unsigned int)ntohl(ss->fw_stats->dropped_link_error_or_filtered);
1832 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_pause);
1833 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_phy);
1834 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_crc32);
1835 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_unicast_filtered);
1836 data[i++] =
1837 (unsigned int)ntohl(ss->fw_stats->dropped_multicast_filtered);
1838 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_runt);
1839 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_overrun);
1840 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_small_buffer);
1841 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_big_buffer);
1842
1843 for (slice = 0; slice < mgp->num_slices; slice++) {
1844 ss = &mgp->ss[slice];
1845 data[i++] = slice;
1846 data[i++] = (unsigned int)ss->tx.pkt_start;
1847 data[i++] = (unsigned int)ss->tx.pkt_done;
1848 data[i++] = (unsigned int)ss->tx.req;
1849 data[i++] = (unsigned int)ss->tx.done;
1850 data[i++] = (unsigned int)ss->rx_small.cnt;
1851 data[i++] = (unsigned int)ss->rx_big.cnt;
1852 data[i++] = (unsigned int)ss->tx.wake_queue;
1853 data[i++] = (unsigned int)ss->tx.stop_queue;
1854 data[i++] = (unsigned int)ss->tx.linearized;
1855 }
1856 }
1857
1858 static void myri10ge_set_msglevel(struct net_device *netdev, u32 value)
1859 {
1860 struct myri10ge_priv *mgp = netdev_priv(netdev);
1861 mgp->msg_enable = value;
1862 }
1863
1864 static u32 myri10ge_get_msglevel(struct net_device *netdev)
1865 {
1866 struct myri10ge_priv *mgp = netdev_priv(netdev);
1867 return mgp->msg_enable;
1868 }
1869
1870 /*
1871 * Use a low-level command to change the LED behavior. Rather than
1872 * blinking (which is the normal case), when identify is used, the
1873 * yellow LED turns solid.
1874 */
1875 static int myri10ge_led(struct myri10ge_priv *mgp, int on)
1876 {
1877 struct mcp_gen_header *hdr;
1878 struct device *dev = &mgp->pdev->dev;
1879 size_t hdr_off, pattern_off, hdr_len;
1880 u32 pattern = 0xfffffffe;
1881
1882 /* find running firmware header */
1883 hdr_off = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
1884 if ((hdr_off & 3) || hdr_off + sizeof(*hdr) > mgp->sram_size) {
1885 dev_err(dev, "Running firmware has bad header offset (%d)\n",
1886 (int)hdr_off);
1887 return -EIO;
1888 }
1889 hdr_len = swab32(readl(mgp->sram + hdr_off +
1890 offsetof(struct mcp_gen_header, header_length)));
1891 pattern_off = hdr_off + offsetof(struct mcp_gen_header, led_pattern);
1892 if (pattern_off >= (hdr_len + hdr_off)) {
1893 dev_info(dev, "Firmware does not support LED identification\n");
1894 return -EINVAL;
1895 }
1896 if (!on)
1897 pattern = swab32(readl(mgp->sram + pattern_off + 4));
1898 writel(swab32(pattern), mgp->sram + pattern_off);
1899 return 0;
1900 }
1901
1902 static int
1903 myri10ge_phys_id(struct net_device *netdev, enum ethtool_phys_id_state state)
1904 {
1905 struct myri10ge_priv *mgp = netdev_priv(netdev);
1906 int rc;
1907
1908 switch (state) {
1909 case ETHTOOL_ID_ACTIVE:
1910 rc = myri10ge_led(mgp, 1);
1911 break;
1912
1913 case ETHTOOL_ID_INACTIVE:
1914 rc = myri10ge_led(mgp, 0);
1915 break;
1916
1917 default:
1918 rc = -EINVAL;
1919 }
1920
1921 return rc;
1922 }
1923
1924 static const struct ethtool_ops myri10ge_ethtool_ops = {
1925 .get_drvinfo = myri10ge_get_drvinfo,
1926 .get_coalesce = myri10ge_get_coalesce,
1927 .set_coalesce = myri10ge_set_coalesce,
1928 .get_pauseparam = myri10ge_get_pauseparam,
1929 .set_pauseparam = myri10ge_set_pauseparam,
1930 .get_ringparam = myri10ge_get_ringparam,
1931 .get_link = ethtool_op_get_link,
1932 .get_strings = myri10ge_get_strings,
1933 .get_sset_count = myri10ge_get_sset_count,
1934 .get_ethtool_stats = myri10ge_get_ethtool_stats,
1935 .set_msglevel = myri10ge_set_msglevel,
1936 .get_msglevel = myri10ge_get_msglevel,
1937 .set_phys_id = myri10ge_phys_id,
1938 .get_link_ksettings = myri10ge_get_link_ksettings,
1939 };
1940
1941 static int myri10ge_allocate_rings(struct myri10ge_slice_state *ss)
1942 {
1943 struct myri10ge_priv *mgp = ss->mgp;
1944 struct myri10ge_cmd cmd;
1945 struct net_device *dev = mgp->dev;
1946 int tx_ring_size, rx_ring_size;
1947 int tx_ring_entries, rx_ring_entries;
1948 int i, slice, status;
1949 size_t bytes;
1950
1951 /* get ring sizes */
1952 slice = ss - mgp->ss;
1953 cmd.data0 = slice;
1954 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0);
1955 tx_ring_size = cmd.data0;
1956 cmd.data0 = slice;
1957 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
1958 if (status != 0)
1959 return status;
1960 rx_ring_size = cmd.data0;
1961
1962 tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send);
1963 rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr);
1964 ss->tx.mask = tx_ring_entries - 1;
1965 ss->rx_small.mask = ss->rx_big.mask = rx_ring_entries - 1;
1966
1967 status = -ENOMEM;
1968
1969 /* allocate the host shadow rings */
1970
1971 bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4)
1972 * sizeof(*ss->tx.req_list);
1973 ss->tx.req_bytes = kzalloc(bytes, GFP_KERNEL);
1974 if (ss->tx.req_bytes == NULL)
1975 goto abort_with_nothing;
1976
1977 /* ensure req_list entries are aligned to 8 bytes */
1978 ss->tx.req_list = (struct mcp_kreq_ether_send *)
1979 ALIGN((unsigned long)ss->tx.req_bytes, 8);
1980 ss->tx.queue_active = 0;
1981
1982 bytes = rx_ring_entries * sizeof(*ss->rx_small.shadow);
1983 ss->rx_small.shadow = kzalloc(bytes, GFP_KERNEL);
1984 if (ss->rx_small.shadow == NULL)
1985 goto abort_with_tx_req_bytes;
1986
1987 bytes = rx_ring_entries * sizeof(*ss->rx_big.shadow);
1988 ss->rx_big.shadow = kzalloc(bytes, GFP_KERNEL);
1989 if (ss->rx_big.shadow == NULL)
1990 goto abort_with_rx_small_shadow;
1991
1992 /* allocate the host info rings */
1993
1994 bytes = tx_ring_entries * sizeof(*ss->tx.info);
1995 ss->tx.info = kzalloc(bytes, GFP_KERNEL);
1996 if (ss->tx.info == NULL)
1997 goto abort_with_rx_big_shadow;
1998
1999 bytes = rx_ring_entries * sizeof(*ss->rx_small.info);
2000 ss->rx_small.info = kzalloc(bytes, GFP_KERNEL);
2001 if (ss->rx_small.info == NULL)
2002 goto abort_with_tx_info;
2003
2004 bytes = rx_ring_entries * sizeof(*ss->rx_big.info);
2005 ss->rx_big.info = kzalloc(bytes, GFP_KERNEL);
2006 if (ss->rx_big.info == NULL)
2007 goto abort_with_rx_small_info;
2008
2009 /* Fill the receive rings */
2010 ss->rx_big.cnt = 0;
2011 ss->rx_small.cnt = 0;
2012 ss->rx_big.fill_cnt = 0;
2013 ss->rx_small.fill_cnt = 0;
2014 ss->rx_small.page_offset = MYRI10GE_ALLOC_SIZE;
2015 ss->rx_big.page_offset = MYRI10GE_ALLOC_SIZE;
2016 ss->rx_small.watchdog_needed = 0;
2017 ss->rx_big.watchdog_needed = 0;
2018 if (mgp->small_bytes == 0) {
2019 ss->rx_small.fill_cnt = ss->rx_small.mask + 1;
2020 } else {
2021 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
2022 mgp->small_bytes + MXGEFW_PAD, 0);
2023 }
2024
2025 if (ss->rx_small.fill_cnt < ss->rx_small.mask + 1) {
2026 netdev_err(dev, "slice-%d: alloced only %d small bufs\n",
2027 slice, ss->rx_small.fill_cnt);
2028 goto abort_with_rx_small_ring;
2029 }
2030
2031 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
2032 if (ss->rx_big.fill_cnt < ss->rx_big.mask + 1) {
2033 netdev_err(dev, "slice-%d: alloced only %d big bufs\n",
2034 slice, ss->rx_big.fill_cnt);
2035 goto abort_with_rx_big_ring;
2036 }
2037
2038 return 0;
2039
2040 abort_with_rx_big_ring:
2041 for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2042 int idx = i & ss->rx_big.mask;
2043 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2044 mgp->big_bytes);
2045 put_page(ss->rx_big.info[idx].page);
2046 }
2047
2048 abort_with_rx_small_ring:
2049 if (mgp->small_bytes == 0)
2050 ss->rx_small.fill_cnt = ss->rx_small.cnt;
2051 for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2052 int idx = i & ss->rx_small.mask;
2053 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2054 mgp->small_bytes + MXGEFW_PAD);
2055 put_page(ss->rx_small.info[idx].page);
2056 }
2057
2058 kfree(ss->rx_big.info);
2059
2060 abort_with_rx_small_info:
2061 kfree(ss->rx_small.info);
2062
2063 abort_with_tx_info:
2064 kfree(ss->tx.info);
2065
2066 abort_with_rx_big_shadow:
2067 kfree(ss->rx_big.shadow);
2068
2069 abort_with_rx_small_shadow:
2070 kfree(ss->rx_small.shadow);
2071
2072 abort_with_tx_req_bytes:
2073 kfree(ss->tx.req_bytes);
2074 ss->tx.req_bytes = NULL;
2075 ss->tx.req_list = NULL;
2076
2077 abort_with_nothing:
2078 return status;
2079 }
2080
2081 static void myri10ge_free_rings(struct myri10ge_slice_state *ss)
2082 {
2083 struct myri10ge_priv *mgp = ss->mgp;
2084 struct sk_buff *skb;
2085 struct myri10ge_tx_buf *tx;
2086 int i, len, idx;
2087
2088 /* If not allocated, skip it */
2089 if (ss->tx.req_list == NULL)
2090 return;
2091
2092 for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2093 idx = i & ss->rx_big.mask;
2094 if (i == ss->rx_big.fill_cnt - 1)
2095 ss->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE;
2096 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2097 mgp->big_bytes);
2098 put_page(ss->rx_big.info[idx].page);
2099 }
2100
2101 if (mgp->small_bytes == 0)
2102 ss->rx_small.fill_cnt = ss->rx_small.cnt;
2103 for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2104 idx = i & ss->rx_small.mask;
2105 if (i == ss->rx_small.fill_cnt - 1)
2106 ss->rx_small.info[idx].page_offset =
2107 MYRI10GE_ALLOC_SIZE;
2108 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2109 mgp->small_bytes + MXGEFW_PAD);
2110 put_page(ss->rx_small.info[idx].page);
2111 }
2112 tx = &ss->tx;
2113 while (tx->done != tx->req) {
2114 idx = tx->done & tx->mask;
2115 skb = tx->info[idx].skb;
2116
2117 /* Mark as free */
2118 tx->info[idx].skb = NULL;
2119 tx->done++;
2120 len = dma_unmap_len(&tx->info[idx], len);
2121 dma_unmap_len_set(&tx->info[idx], len, 0);
2122 if (skb) {
2123 ss->stats.tx_dropped++;
2124 dev_kfree_skb_any(skb);
2125 if (len)
2126 pci_unmap_single(mgp->pdev,
2127 dma_unmap_addr(&tx->info[idx],
2128 bus), len,
2129 PCI_DMA_TODEVICE);
2130 } else {
2131 if (len)
2132 pci_unmap_page(mgp->pdev,
2133 dma_unmap_addr(&tx->info[idx],
2134 bus), len,
2135 PCI_DMA_TODEVICE);
2136 }
2137 }
2138 kfree(ss->rx_big.info);
2139
2140 kfree(ss->rx_small.info);
2141
2142 kfree(ss->tx.info);
2143
2144 kfree(ss->rx_big.shadow);
2145
2146 kfree(ss->rx_small.shadow);
2147
2148 kfree(ss->tx.req_bytes);
2149 ss->tx.req_bytes = NULL;
2150 ss->tx.req_list = NULL;
2151 }
2152
2153 static int myri10ge_request_irq(struct myri10ge_priv *mgp)
2154 {
2155 struct pci_dev *pdev = mgp->pdev;
2156 struct myri10ge_slice_state *ss;
2157 struct net_device *netdev = mgp->dev;
2158 int i;
2159 int status;
2160
2161 mgp->msi_enabled = 0;
2162 mgp->msix_enabled = 0;
2163 status = 0;
2164 if (myri10ge_msi) {
2165 if (mgp->num_slices > 1) {
2166 status = pci_enable_msix_range(pdev, mgp->msix_vectors,
2167 mgp->num_slices, mgp->num_slices);
2168 if (status < 0) {
2169 dev_err(&pdev->dev,
2170 "Error %d setting up MSI-X\n", status);
2171 return status;
2172 }
2173 mgp->msix_enabled = 1;
2174 }
2175 if (mgp->msix_enabled == 0) {
2176 status = pci_enable_msi(pdev);
2177 if (status != 0) {
2178 dev_err(&pdev->dev,
2179 "Error %d setting up MSI; falling back to xPIC\n",
2180 status);
2181 } else {
2182 mgp->msi_enabled = 1;
2183 }
2184 }
2185 }
2186 if (mgp->msix_enabled) {
2187 for (i = 0; i < mgp->num_slices; i++) {
2188 ss = &mgp->ss[i];
2189 snprintf(ss->irq_desc, sizeof(ss->irq_desc),
2190 "%s:slice-%d", netdev->name, i);
2191 status = request_irq(mgp->msix_vectors[i].vector,
2192 myri10ge_intr, 0, ss->irq_desc,
2193 ss);
2194 if (status != 0) {
2195 dev_err(&pdev->dev,
2196 "slice %d failed to allocate IRQ\n", i);
2197 i--;
2198 while (i >= 0) {
2199 free_irq(mgp->msix_vectors[i].vector,
2200 &mgp->ss[i]);
2201 i--;
2202 }
2203 pci_disable_msix(pdev);
2204 return status;
2205 }
2206 }
2207 } else {
2208 status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED,
2209 mgp->dev->name, &mgp->ss[0]);
2210 if (status != 0) {
2211 dev_err(&pdev->dev, "failed to allocate IRQ\n");
2212 if (mgp->msi_enabled)
2213 pci_disable_msi(pdev);
2214 }
2215 }
2216 return status;
2217 }
2218
2219 static void myri10ge_free_irq(struct myri10ge_priv *mgp)
2220 {
2221 struct pci_dev *pdev = mgp->pdev;
2222 int i;
2223
2224 if (mgp->msix_enabled) {
2225 for (i = 0; i < mgp->num_slices; i++)
2226 free_irq(mgp->msix_vectors[i].vector, &mgp->ss[i]);
2227 } else {
2228 free_irq(pdev->irq, &mgp->ss[0]);
2229 }
2230 if (mgp->msi_enabled)
2231 pci_disable_msi(pdev);
2232 if (mgp->msix_enabled)
2233 pci_disable_msix(pdev);
2234 }
2235
2236 static int myri10ge_get_txrx(struct myri10ge_priv *mgp, int slice)
2237 {
2238 struct myri10ge_cmd cmd;
2239 struct myri10ge_slice_state *ss;
2240 int status;
2241
2242 ss = &mgp->ss[slice];
2243 status = 0;
2244 if (slice == 0 || (mgp->dev->real_num_tx_queues > 1)) {
2245 cmd.data0 = slice;
2246 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET,
2247 &cmd, 0);
2248 ss->tx.lanai = (struct mcp_kreq_ether_send __iomem *)
2249 (mgp->sram + cmd.data0);
2250 }
2251 cmd.data0 = slice;
2252 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET,
2253 &cmd, 0);
2254 ss->rx_small.lanai = (struct mcp_kreq_ether_recv __iomem *)
2255 (mgp->sram + cmd.data0);
2256
2257 cmd.data0 = slice;
2258 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0);
2259 ss->rx_big.lanai = (struct mcp_kreq_ether_recv __iomem *)
2260 (mgp->sram + cmd.data0);
2261
2262 ss->tx.send_go = (__iomem __be32 *)
2263 (mgp->sram + MXGEFW_ETH_SEND_GO + 64 * slice);
2264 ss->tx.send_stop = (__iomem __be32 *)
2265 (mgp->sram + MXGEFW_ETH_SEND_STOP + 64 * slice);
2266 return status;
2267
2268 }
2269
2270 static int myri10ge_set_stats(struct myri10ge_priv *mgp, int slice)
2271 {
2272 struct myri10ge_cmd cmd;
2273 struct myri10ge_slice_state *ss;
2274 int status;
2275
2276 ss = &mgp->ss[slice];
2277 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->fw_stats_bus);
2278 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->fw_stats_bus);
2279 cmd.data2 = sizeof(struct mcp_irq_data) | (slice << 16);
2280 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0);
2281 if (status == -ENOSYS) {
2282 dma_addr_t bus = ss->fw_stats_bus;
2283 if (slice != 0)
2284 return -EINVAL;
2285 bus += offsetof(struct mcp_irq_data, send_done_count);
2286 cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus);
2287 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus);
2288 status = myri10ge_send_cmd(mgp,
2289 MXGEFW_CMD_SET_STATS_DMA_OBSOLETE,
2290 &cmd, 0);
2291 /* Firmware cannot support multicast without STATS_DMA_V2 */
2292 mgp->fw_multicast_support = 0;
2293 } else {
2294 mgp->fw_multicast_support = 1;
2295 }
2296 return 0;
2297 }
2298
2299 static int myri10ge_open(struct net_device *dev)
2300 {
2301 struct myri10ge_slice_state *ss;
2302 struct myri10ge_priv *mgp = netdev_priv(dev);
2303 struct myri10ge_cmd cmd;
2304 int i, status, big_pow2, slice;
2305 u8 __iomem *itable;
2306
2307 if (mgp->running != MYRI10GE_ETH_STOPPED)
2308 return -EBUSY;
2309
2310 mgp->running = MYRI10GE_ETH_STARTING;
2311 status = myri10ge_reset(mgp);
2312 if (status != 0) {
2313 netdev_err(dev, "failed reset\n");
2314 goto abort_with_nothing;
2315 }
2316
2317 if (mgp->num_slices > 1) {
2318 cmd.data0 = mgp->num_slices;
2319 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
2320 if (mgp->dev->real_num_tx_queues > 1)
2321 cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
2322 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
2323 &cmd, 0);
2324 if (status != 0) {
2325 netdev_err(dev, "failed to set number of slices\n");
2326 goto abort_with_nothing;
2327 }
2328 /* setup the indirection table */
2329 cmd.data0 = mgp->num_slices;
2330 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_TABLE_SIZE,
2331 &cmd, 0);
2332
2333 status |= myri10ge_send_cmd(mgp,
2334 MXGEFW_CMD_GET_RSS_TABLE_OFFSET,
2335 &cmd, 0);
2336 if (status != 0) {
2337 netdev_err(dev, "failed to setup rss tables\n");
2338 goto abort_with_nothing;
2339 }
2340
2341 /* just enable an identity mapping */
2342 itable = mgp->sram + cmd.data0;
2343 for (i = 0; i < mgp->num_slices; i++)
2344 __raw_writeb(i, &itable[i]);
2345
2346 cmd.data0 = 1;
2347 cmd.data1 = myri10ge_rss_hash;
2348 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_ENABLE,
2349 &cmd, 0);
2350 if (status != 0) {
2351 netdev_err(dev, "failed to enable slices\n");
2352 goto abort_with_nothing;
2353 }
2354 }
2355
2356 status = myri10ge_request_irq(mgp);
2357 if (status != 0)
2358 goto abort_with_nothing;
2359
2360 /* decide what small buffer size to use. For good TCP rx
2361 * performance, it is important to not receive 1514 byte
2362 * frames into jumbo buffers, as it confuses the socket buffer
2363 * accounting code, leading to drops and erratic performance.
2364 */
2365
2366 if (dev->mtu <= ETH_DATA_LEN)
2367 /* enough for a TCP header */
2368 mgp->small_bytes = (128 > SMP_CACHE_BYTES)
2369 ? (128 - MXGEFW_PAD)
2370 : (SMP_CACHE_BYTES - MXGEFW_PAD);
2371 else
2372 /* enough for a vlan encapsulated ETH_DATA_LEN frame */
2373 mgp->small_bytes = VLAN_ETH_FRAME_LEN;
2374
2375 /* Override the small buffer size? */
2376 if (myri10ge_small_bytes >= 0)
2377 mgp->small_bytes = myri10ge_small_bytes;
2378
2379 /* Firmware needs the big buff size as a power of 2. Lie and
2380 * tell him the buffer is larger, because we only use 1
2381 * buffer/pkt, and the mtu will prevent overruns.
2382 */
2383 big_pow2 = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2384 if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) {
2385 while (!is_power_of_2(big_pow2))
2386 big_pow2++;
2387 mgp->big_bytes = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2388 } else {
2389 big_pow2 = MYRI10GE_ALLOC_SIZE;
2390 mgp->big_bytes = big_pow2;
2391 }
2392
2393 /* setup the per-slice data structures */
2394 for (slice = 0; slice < mgp->num_slices; slice++) {
2395 ss = &mgp->ss[slice];
2396
2397 status = myri10ge_get_txrx(mgp, slice);
2398 if (status != 0) {
2399 netdev_err(dev, "failed to get ring sizes or locations\n");
2400 goto abort_with_rings;
2401 }
2402 status = myri10ge_allocate_rings(ss);
2403 if (status != 0)
2404 goto abort_with_rings;
2405
2406 /* only firmware which supports multiple TX queues
2407 * supports setting up the tx stats on non-zero
2408 * slices */
2409 if (slice == 0 || mgp->dev->real_num_tx_queues > 1)
2410 status = myri10ge_set_stats(mgp, slice);
2411 if (status) {
2412 netdev_err(dev, "Couldn't set stats DMA\n");
2413 goto abort_with_rings;
2414 }
2415
2416 /* must happen prior to any irq */
2417 napi_enable(&(ss)->napi);
2418 }
2419
2420 /* now give firmware buffers sizes, and MTU */
2421 cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
2422 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0);
2423 cmd.data0 = mgp->small_bytes;
2424 status |=
2425 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0);
2426 cmd.data0 = big_pow2;
2427 status |=
2428 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0);
2429 if (status) {
2430 netdev_err(dev, "Couldn't set buffer sizes\n");
2431 goto abort_with_rings;
2432 }
2433
2434 /*
2435 * Set Linux style TSO mode; this is needed only on newer
2436 * firmware versions. Older versions default to Linux
2437 * style TSO
2438 */
2439 cmd.data0 = 0;
2440 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_TSO_MODE, &cmd, 0);
2441 if (status && status != -ENOSYS) {
2442 netdev_err(dev, "Couldn't set TSO mode\n");
2443 goto abort_with_rings;
2444 }
2445
2446 mgp->link_state = ~0U;
2447 mgp->rdma_tags_available = 15;
2448
2449 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0);
2450 if (status) {
2451 netdev_err(dev, "Couldn't bring up link\n");
2452 goto abort_with_rings;
2453 }
2454
2455 mgp->running = MYRI10GE_ETH_RUNNING;
2456 mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ;
2457 add_timer(&mgp->watchdog_timer);
2458 netif_tx_wake_all_queues(dev);
2459
2460 return 0;
2461
2462 abort_with_rings:
2463 while (slice) {
2464 slice--;
2465 napi_disable(&mgp->ss[slice].napi);
2466 }
2467 for (i = 0; i < mgp->num_slices; i++)
2468 myri10ge_free_rings(&mgp->ss[i]);
2469
2470 myri10ge_free_irq(mgp);
2471
2472 abort_with_nothing:
2473 mgp->running = MYRI10GE_ETH_STOPPED;
2474 return -ENOMEM;
2475 }
2476
2477 static int myri10ge_close(struct net_device *dev)
2478 {
2479 struct myri10ge_priv *mgp = netdev_priv(dev);
2480 struct myri10ge_cmd cmd;
2481 int status, old_down_cnt;
2482 int i;
2483
2484 if (mgp->running != MYRI10GE_ETH_RUNNING)
2485 return 0;
2486
2487 if (mgp->ss[0].tx.req_bytes == NULL)
2488 return 0;
2489
2490 del_timer_sync(&mgp->watchdog_timer);
2491 mgp->running = MYRI10GE_ETH_STOPPING;
2492 for (i = 0; i < mgp->num_slices; i++)
2493 napi_disable(&mgp->ss[i].napi);
2494
2495 netif_carrier_off(dev);
2496
2497 netif_tx_stop_all_queues(dev);
2498 if (mgp->rebooted == 0) {
2499 old_down_cnt = mgp->down_cnt;
2500 mb();
2501 status =
2502 myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0);
2503 if (status)
2504 netdev_err(dev, "Couldn't bring down link\n");
2505
2506 wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt,
2507 HZ);
2508 if (old_down_cnt == mgp->down_cnt)
2509 netdev_err(dev, "never got down irq\n");
2510 }
2511 netif_tx_disable(dev);
2512 myri10ge_free_irq(mgp);
2513 for (i = 0; i < mgp->num_slices; i++)
2514 myri10ge_free_rings(&mgp->ss[i]);
2515
2516 mgp->running = MYRI10GE_ETH_STOPPED;
2517 return 0;
2518 }
2519
2520 /* copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
2521 * backwards one at a time and handle ring wraps */
2522
2523 static inline void
2524 myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx,
2525 struct mcp_kreq_ether_send *src, int cnt)
2526 {
2527 int idx, starting_slot;
2528 starting_slot = tx->req;
2529 while (cnt > 1) {
2530 cnt--;
2531 idx = (starting_slot + cnt) & tx->mask;
2532 myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src));
2533 mb();
2534 }
2535 }
2536
2537 /*
2538 * copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
2539 * at most 32 bytes at a time, so as to avoid involving the software
2540 * pio handler in the nic. We re-write the first segment's flags
2541 * to mark them valid only after writing the entire chain.
2542 */
2543
2544 static inline void
2545 myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src,
2546 int cnt)
2547 {
2548 int idx, i;
2549 struct mcp_kreq_ether_send __iomem *dstp, *dst;
2550 struct mcp_kreq_ether_send *srcp;
2551 u8 last_flags;
2552
2553 idx = tx->req & tx->mask;
2554
2555 last_flags = src->flags;
2556 src->flags = 0;
2557 mb();
2558 dst = dstp = &tx->lanai[idx];
2559 srcp = src;
2560
2561 if ((idx + cnt) < tx->mask) {
2562 for (i = 0; i < (cnt - 1); i += 2) {
2563 myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src));
2564 mb(); /* force write every 32 bytes */
2565 srcp += 2;
2566 dstp += 2;
2567 }
2568 } else {
2569 /* submit all but the first request, and ensure
2570 * that it is submitted below */
2571 myri10ge_submit_req_backwards(tx, src, cnt);
2572 i = 0;
2573 }
2574 if (i < cnt) {
2575 /* submit the first request */
2576 myri10ge_pio_copy(dstp, srcp, sizeof(*src));
2577 mb(); /* barrier before setting valid flag */
2578 }
2579
2580 /* re-write the last 32-bits with the valid flags */
2581 src->flags = last_flags;
2582 put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3);
2583 tx->req += cnt;
2584 mb();
2585 }
2586
2587 static void myri10ge_unmap_tx_dma(struct myri10ge_priv *mgp,
2588 struct myri10ge_tx_buf *tx, int idx)
2589 {
2590 unsigned int len;
2591 int last_idx;
2592
2593 /* Free any DMA resources we've alloced and clear out the skb slot */
2594 last_idx = (idx + 1) & tx->mask;
2595 idx = tx->req & tx->mask;
2596 do {
2597 len = dma_unmap_len(&tx->info[idx], len);
2598 if (len) {
2599 if (tx->info[idx].skb != NULL)
2600 pci_unmap_single(mgp->pdev,
2601 dma_unmap_addr(&tx->info[idx],
2602 bus), len,
2603 PCI_DMA_TODEVICE);
2604 else
2605 pci_unmap_page(mgp->pdev,
2606 dma_unmap_addr(&tx->info[idx],
2607 bus), len,
2608 PCI_DMA_TODEVICE);
2609 dma_unmap_len_set(&tx->info[idx], len, 0);
2610 tx->info[idx].skb = NULL;
2611 }
2612 idx = (idx + 1) & tx->mask;
2613 } while (idx != last_idx);
2614 }
2615
2616 /*
2617 * Transmit a packet. We need to split the packet so that a single
2618 * segment does not cross myri10ge->tx_boundary, so this makes segment
2619 * counting tricky. So rather than try to count segments up front, we
2620 * just give up if there are too few segments to hold a reasonably
2621 * fragmented packet currently available. If we run
2622 * out of segments while preparing a packet for DMA, we just linearize
2623 * it and try again.
2624 */
2625
2626 static netdev_tx_t myri10ge_xmit(struct sk_buff *skb,
2627 struct net_device *dev)
2628 {
2629 struct myri10ge_priv *mgp = netdev_priv(dev);
2630 struct myri10ge_slice_state *ss;
2631 struct mcp_kreq_ether_send *req;
2632 struct myri10ge_tx_buf *tx;
2633 struct skb_frag_struct *frag;
2634 struct netdev_queue *netdev_queue;
2635 dma_addr_t bus;
2636 u32 low;
2637 __be32 high_swapped;
2638 unsigned int len;
2639 int idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
2640 u16 pseudo_hdr_offset, cksum_offset, queue;
2641 int cum_len, seglen, boundary, rdma_count;
2642 u8 flags, odd_flag;
2643
2644 queue = skb_get_queue_mapping(skb);
2645 ss = &mgp->ss[queue];
2646 netdev_queue = netdev_get_tx_queue(mgp->dev, queue);
2647 tx = &ss->tx;
2648
2649 again:
2650 req = tx->req_list;
2651 avail = tx->mask - 1 - (tx->req - tx->done);
2652
2653 mss = 0;
2654 max_segments = MXGEFW_MAX_SEND_DESC;
2655
2656 if (skb_is_gso(skb)) {
2657 mss = skb_shinfo(skb)->gso_size;
2658 max_segments = MYRI10GE_MAX_SEND_DESC_TSO;
2659 }
2660
2661 if ((unlikely(avail < max_segments))) {
2662 /* we are out of transmit resources */
2663 tx->stop_queue++;
2664 netif_tx_stop_queue(netdev_queue);
2665 return NETDEV_TX_BUSY;
2666 }
2667
2668 /* Setup checksum offloading, if needed */
2669 cksum_offset = 0;
2670 pseudo_hdr_offset = 0;
2671 odd_flag = 0;
2672 flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
2673 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2674 cksum_offset = skb_checksum_start_offset(skb);
2675 pseudo_hdr_offset = cksum_offset + skb->csum_offset;
2676 /* If the headers are excessively large, then we must
2677 * fall back to a software checksum */
2678 if (unlikely(!mss && (cksum_offset > 255 ||
2679 pseudo_hdr_offset > 127))) {
2680 if (skb_checksum_help(skb))
2681 goto drop;
2682 cksum_offset = 0;
2683 pseudo_hdr_offset = 0;
2684 } else {
2685 odd_flag = MXGEFW_FLAGS_ALIGN_ODD;
2686 flags |= MXGEFW_FLAGS_CKSUM;
2687 }
2688 }
2689
2690 cum_len = 0;
2691
2692 if (mss) { /* TSO */
2693 /* this removes any CKSUM flag from before */
2694 flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST);
2695
2696 /* negative cum_len signifies to the
2697 * send loop that we are still in the
2698 * header portion of the TSO packet.
2699 * TSO header can be at most 1KB long */
2700 cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb));
2701
2702 /* for IPv6 TSO, the checksum offset stores the
2703 * TCP header length, to save the firmware from
2704 * the need to parse the headers */
2705 if (skb_is_gso_v6(skb)) {
2706 cksum_offset = tcp_hdrlen(skb);
2707 /* Can only handle headers <= max_tso6 long */
2708 if (unlikely(-cum_len > mgp->max_tso6))
2709 return myri10ge_sw_tso(skb, dev);
2710 }
2711 /* for TSO, pseudo_hdr_offset holds mss.
2712 * The firmware figures out where to put
2713 * the checksum by parsing the header. */
2714 pseudo_hdr_offset = mss;
2715 } else
2716 /* Mark small packets, and pad out tiny packets */
2717 if (skb->len <= MXGEFW_SEND_SMALL_SIZE) {
2718 flags |= MXGEFW_FLAGS_SMALL;
2719
2720 /* pad frames to at least ETH_ZLEN bytes */
2721 if (eth_skb_pad(skb)) {
2722 /* The packet is gone, so we must
2723 * return 0 */
2724 ss->stats.tx_dropped += 1;
2725 return NETDEV_TX_OK;
2726 }
2727 }
2728
2729 /* map the skb for DMA */
2730 len = skb_headlen(skb);
2731 bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE);
2732 if (unlikely(pci_dma_mapping_error(mgp->pdev, bus)))
2733 goto drop;
2734
2735 idx = tx->req & tx->mask;
2736 tx->info[idx].skb = skb;
2737 dma_unmap_addr_set(&tx->info[idx], bus, bus);
2738 dma_unmap_len_set(&tx->info[idx], len, len);
2739
2740 frag_cnt = skb_shinfo(skb)->nr_frags;
2741 frag_idx = 0;
2742 count = 0;
2743 rdma_count = 0;
2744
2745 /* "rdma_count" is the number of RDMAs belonging to the
2746 * current packet BEFORE the current send request. For
2747 * non-TSO packets, this is equal to "count".
2748 * For TSO packets, rdma_count needs to be reset
2749 * to 0 after a segment cut.
2750 *
2751 * The rdma_count field of the send request is
2752 * the number of RDMAs of the packet starting at
2753 * that request. For TSO send requests with one ore more cuts
2754 * in the middle, this is the number of RDMAs starting
2755 * after the last cut in the request. All previous
2756 * segments before the last cut implicitly have 1 RDMA.
2757 *
2758 * Since the number of RDMAs is not known beforehand,
2759 * it must be filled-in retroactively - after each
2760 * segmentation cut or at the end of the entire packet.
2761 */
2762
2763 while (1) {
2764 /* Break the SKB or Fragment up into pieces which
2765 * do not cross mgp->tx_boundary */
2766 low = MYRI10GE_LOWPART_TO_U32(bus);
2767 high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
2768 while (len) {
2769 u8 flags_next;
2770 int cum_len_next;
2771
2772 if (unlikely(count == max_segments))
2773 goto abort_linearize;
2774
2775 boundary =
2776 (low + mgp->tx_boundary) & ~(mgp->tx_boundary - 1);
2777 seglen = boundary - low;
2778 if (seglen > len)
2779 seglen = len;
2780 flags_next = flags & ~MXGEFW_FLAGS_FIRST;
2781 cum_len_next = cum_len + seglen;
2782 if (mss) { /* TSO */
2783 (req - rdma_count)->rdma_count = rdma_count + 1;
2784
2785 if (likely(cum_len >= 0)) { /* payload */
2786 int next_is_first, chop;
2787
2788 chop = (cum_len_next > mss);
2789 cum_len_next = cum_len_next % mss;
2790 next_is_first = (cum_len_next == 0);
2791 flags |= chop * MXGEFW_FLAGS_TSO_CHOP;
2792 flags_next |= next_is_first *
2793 MXGEFW_FLAGS_FIRST;
2794 rdma_count |= -(chop | next_is_first);
2795 rdma_count += chop & ~next_is_first;
2796 } else if (likely(cum_len_next >= 0)) { /* header ends */
2797 int small;
2798
2799 rdma_count = -1;
2800 cum_len_next = 0;
2801 seglen = -cum_len;
2802 small = (mss <= MXGEFW_SEND_SMALL_SIZE);
2803 flags_next = MXGEFW_FLAGS_TSO_PLD |
2804 MXGEFW_FLAGS_FIRST |
2805 (small * MXGEFW_FLAGS_SMALL);
2806 }
2807 }
2808 req->addr_high = high_swapped;
2809 req->addr_low = htonl(low);
2810 req->pseudo_hdr_offset = htons(pseudo_hdr_offset);
2811 req->pad = 0; /* complete solid 16-byte block; does this matter? */
2812 req->rdma_count = 1;
2813 req->length = htons(seglen);
2814 req->cksum_offset = cksum_offset;
2815 req->flags = flags | ((cum_len & 1) * odd_flag);
2816
2817 low += seglen;
2818 len -= seglen;
2819 cum_len = cum_len_next;
2820 flags = flags_next;
2821 req++;
2822 count++;
2823 rdma_count++;
2824 if (cksum_offset != 0 && !(mss && skb_is_gso_v6(skb))) {
2825 if (unlikely(cksum_offset > seglen))
2826 cksum_offset -= seglen;
2827 else
2828 cksum_offset = 0;
2829 }
2830 }
2831 if (frag_idx == frag_cnt)
2832 break;
2833
2834 /* map next fragment for DMA */
2835 frag = &skb_shinfo(skb)->frags[frag_idx];
2836 frag_idx++;
2837 len = skb_frag_size(frag);
2838 bus = skb_frag_dma_map(&mgp->pdev->dev, frag, 0, len,
2839 DMA_TO_DEVICE);
2840 if (unlikely(pci_dma_mapping_error(mgp->pdev, bus))) {
2841 myri10ge_unmap_tx_dma(mgp, tx, idx);
2842 goto drop;
2843 }
2844 idx = (count + tx->req) & tx->mask;
2845 dma_unmap_addr_set(&tx->info[idx], bus, bus);
2846 dma_unmap_len_set(&tx->info[idx], len, len);
2847 }
2848
2849 (req - rdma_count)->rdma_count = rdma_count;
2850 if (mss)
2851 do {
2852 req--;
2853 req->flags |= MXGEFW_FLAGS_TSO_LAST;
2854 } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP |
2855 MXGEFW_FLAGS_FIRST)));
2856 idx = ((count - 1) + tx->req) & tx->mask;
2857 tx->info[idx].last = 1;
2858 myri10ge_submit_req(tx, tx->req_list, count);
2859 /* if using multiple tx queues, make sure NIC polls the
2860 * current slice */
2861 if ((mgp->dev->real_num_tx_queues > 1) && tx->queue_active == 0) {
2862 tx->queue_active = 1;
2863 put_be32(htonl(1), tx->send_go);
2864 mb();
2865 mmiowb();
2866 }
2867 tx->pkt_start++;
2868 if ((avail - count) < MXGEFW_MAX_SEND_DESC) {
2869 tx->stop_queue++;
2870 netif_tx_stop_queue(netdev_queue);
2871 }
2872 return NETDEV_TX_OK;
2873
2874 abort_linearize:
2875 myri10ge_unmap_tx_dma(mgp, tx, idx);
2876
2877 if (skb_is_gso(skb)) {
2878 netdev_err(mgp->dev, "TSO but wanted to linearize?!?!?\n");
2879 goto drop;
2880 }
2881
2882 if (skb_linearize(skb))
2883 goto drop;
2884
2885 tx->linearized++;
2886 goto again;
2887
2888 drop:
2889 dev_kfree_skb_any(skb);
2890 ss->stats.tx_dropped += 1;
2891 return NETDEV_TX_OK;
2892
2893 }
2894
2895 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
2896 struct net_device *dev)
2897 {
2898 struct sk_buff *segs, *curr;
2899 struct myri10ge_priv *mgp = netdev_priv(dev);
2900 struct myri10ge_slice_state *ss;
2901 netdev_tx_t status;
2902
2903 segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO6);
2904 if (IS_ERR(segs))
2905 goto drop;
2906
2907 while (segs) {
2908 curr = segs;
2909 segs = segs->next;
2910 curr->next = NULL;
2911 status = myri10ge_xmit(curr, dev);
2912 if (status != 0) {
2913 dev_kfree_skb_any(curr);
2914 if (segs != NULL) {
2915 curr = segs;
2916 segs = segs->next;
2917 curr->next = NULL;
2918 dev_kfree_skb_any(segs);
2919 }
2920 goto drop;
2921 }
2922 }
2923 dev_kfree_skb_any(skb);
2924 return NETDEV_TX_OK;
2925
2926 drop:
2927 ss = &mgp->ss[skb_get_queue_mapping(skb)];
2928 dev_kfree_skb_any(skb);
2929 ss->stats.tx_dropped += 1;
2930 return NETDEV_TX_OK;
2931 }
2932
2933 static void myri10ge_get_stats(struct net_device *dev,
2934 struct rtnl_link_stats64 *stats)
2935 {
2936 const struct myri10ge_priv *mgp = netdev_priv(dev);
2937 const struct myri10ge_slice_netstats *slice_stats;
2938 int i;
2939
2940 for (i = 0; i < mgp->num_slices; i++) {
2941 slice_stats = &mgp->ss[i].stats;
2942 stats->rx_packets += slice_stats->rx_packets;
2943 stats->tx_packets += slice_stats->tx_packets;
2944 stats->rx_bytes += slice_stats->rx_bytes;
2945 stats->tx_bytes += slice_stats->tx_bytes;
2946 stats->rx_dropped += slice_stats->rx_dropped;
2947 stats->tx_dropped += slice_stats->tx_dropped;
2948 }
2949 }
2950
2951 static void myri10ge_set_multicast_list(struct net_device *dev)
2952 {
2953 struct myri10ge_priv *mgp = netdev_priv(dev);
2954 struct myri10ge_cmd cmd;
2955 struct netdev_hw_addr *ha;
2956 __be32 data[2] = { 0, 0 };
2957 int err;
2958
2959 /* can be called from atomic contexts,
2960 * pass 1 to force atomicity in myri10ge_send_cmd() */
2961 myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1);
2962
2963 /* This firmware is known to not support multicast */
2964 if (!mgp->fw_multicast_support)
2965 return;
2966
2967 /* Disable multicast filtering */
2968
2969 err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1);
2970 if (err != 0) {
2971 netdev_err(dev, "Failed MXGEFW_ENABLE_ALLMULTI, error status: %d\n",
2972 err);
2973 goto abort;
2974 }
2975
2976 if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) {
2977 /* request to disable multicast filtering, so quit here */
2978 return;
2979 }
2980
2981 /* Flush the filters */
2982
2983 err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS,
2984 &cmd, 1);
2985 if (err != 0) {
2986 netdev_err(dev, "Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS, error status: %d\n",
2987 err);
2988 goto abort;
2989 }
2990
2991 /* Walk the multicast list, and add each address */
2992 netdev_for_each_mc_addr(ha, dev) {
2993 memcpy(data, &ha->addr, ETH_ALEN);
2994 cmd.data0 = ntohl(data[0]);
2995 cmd.data1 = ntohl(data[1]);
2996 err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP,
2997 &cmd, 1);
2998
2999 if (err != 0) {
3000 netdev_err(dev, "Failed MXGEFW_JOIN_MULTICAST_GROUP, error status:%d %pM\n",
3001 err, ha->addr);
3002 goto abort;
3003 }
3004 }
3005 /* Enable multicast filtering */
3006 err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1);
3007 if (err != 0) {
3008 netdev_err(dev, "Failed MXGEFW_DISABLE_ALLMULTI, error status: %d\n",
3009 err);
3010 goto abort;
3011 }
3012
3013 return;
3014
3015 abort:
3016 return;
3017 }
3018
3019 static int myri10ge_set_mac_address(struct net_device *dev, void *addr)
3020 {
3021 struct sockaddr *sa = addr;
3022 struct myri10ge_priv *mgp = netdev_priv(dev);
3023 int status;
3024
3025 if (!is_valid_ether_addr(sa->sa_data))
3026 return -EADDRNOTAVAIL;
3027
3028 status = myri10ge_update_mac_address(mgp, sa->sa_data);
3029 if (status != 0) {
3030 netdev_err(dev, "changing mac address failed with %d\n",
3031 status);
3032 return status;
3033 }
3034
3035 /* change the dev structure */
3036 memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN);
3037 return 0;
3038 }
3039
3040 static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
3041 {
3042 struct myri10ge_priv *mgp = netdev_priv(dev);
3043 int error = 0;
3044
3045 netdev_info(dev, "changing mtu from %d to %d\n", dev->mtu, new_mtu);
3046 if (mgp->running) {
3047 /* if we change the mtu on an active device, we must
3048 * reset the device so the firmware sees the change */
3049 myri10ge_close(dev);
3050 dev->mtu = new_mtu;
3051 myri10ge_open(dev);
3052 } else
3053 dev->mtu = new_mtu;
3054
3055 return error;
3056 }
3057
3058 /*
3059 * Enable ECRC to align PCI-E Completion packets on an 8-byte boundary.
3060 * Only do it if the bridge is a root port since we don't want to disturb
3061 * any other device, except if forced with myri10ge_ecrc_enable > 1.
3062 */
3063
3064 static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
3065 {
3066 struct pci_dev *bridge = mgp->pdev->bus->self;
3067 struct device *dev = &mgp->pdev->dev;
3068 int cap;
3069 unsigned err_cap;
3070 int ret;
3071
3072 if (!myri10ge_ecrc_enable || !bridge)
3073 return;
3074
3075 /* check that the bridge is a root port */
3076 if (pci_pcie_type(bridge) != PCI_EXP_TYPE_ROOT_PORT) {
3077 if (myri10ge_ecrc_enable > 1) {
3078 struct pci_dev *prev_bridge, *old_bridge = bridge;
3079
3080 /* Walk the hierarchy up to the root port
3081 * where ECRC has to be enabled */
3082 do {
3083 prev_bridge = bridge;
3084 bridge = bridge->bus->self;
3085 if (!bridge || prev_bridge == bridge) {
3086 dev_err(dev,
3087 "Failed to find root port"
3088 " to force ECRC\n");
3089 return;
3090 }
3091 } while (pci_pcie_type(bridge) !=
3092 PCI_EXP_TYPE_ROOT_PORT);
3093
3094 dev_info(dev,
3095 "Forcing ECRC on non-root port %s"
3096 " (enabling on root port %s)\n",
3097 pci_name(old_bridge), pci_name(bridge));
3098 } else {
3099 dev_err(dev,
3100 "Not enabling ECRC on non-root port %s\n",
3101 pci_name(bridge));
3102 return;
3103 }
3104 }
3105
3106 cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
3107 if (!cap)
3108 return;
3109
3110 ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap);
3111 if (ret) {
3112 dev_err(dev, "failed reading ext-conf-space of %s\n",
3113 pci_name(bridge));
3114 dev_err(dev, "\t pci=nommconf in use? "
3115 "or buggy/incomplete/absent ACPI MCFG attr?\n");
3116 return;
3117 }
3118 if (!(err_cap & PCI_ERR_CAP_ECRC_GENC))
3119 return;
3120
3121 err_cap |= PCI_ERR_CAP_ECRC_GENE;
3122 pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap);
3123 dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge));
3124 }
3125
3126 /*
3127 * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput
3128 * when the PCI-E Completion packets are aligned on an 8-byte
3129 * boundary. Some PCI-E chip sets always align Completion packets; on
3130 * the ones that do not, the alignment can be enforced by enabling
3131 * ECRC generation (if supported).
3132 *
3133 * When PCI-E Completion packets are not aligned, it is actually more
3134 * efficient to limit Read-DMA transactions to 2KB, rather than 4KB.
3135 *
3136 * If the driver can neither enable ECRC nor verify that it has
3137 * already been enabled, then it must use a firmware image which works
3138 * around unaligned completion packets (myri10ge_rss_ethp_z8e.dat), and it
3139 * should also ensure that it never gives the device a Read-DMA which is
3140 * larger than 2KB by setting the tx_boundary to 2KB. If ECRC is
3141 * enabled, then the driver should use the aligned (myri10ge_rss_eth_z8e.dat)
3142 * firmware image, and set tx_boundary to 4KB.
3143 */
3144
3145 static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
3146 {
3147 struct pci_dev *pdev = mgp->pdev;
3148 struct device *dev = &pdev->dev;
3149 int status;
3150
3151 mgp->tx_boundary = 4096;
3152 /*
3153 * Verify the max read request size was set to 4KB
3154 * before trying the test with 4KB.
3155 */
3156 status = pcie_get_readrq(pdev);
3157 if (status < 0) {
3158 dev_err(dev, "Couldn't read max read req size: %d\n", status);
3159 goto abort;
3160 }
3161 if (status != 4096) {
3162 dev_warn(dev, "Max Read Request size != 4096 (%d)\n", status);
3163 mgp->tx_boundary = 2048;
3164 }
3165 /*
3166 * load the optimized firmware (which assumes aligned PCIe
3167 * completions) in order to see if it works on this host.
3168 */
3169 set_fw_name(mgp, myri10ge_fw_aligned, false);
3170 status = myri10ge_load_firmware(mgp, 1);
3171 if (status != 0) {
3172 goto abort;
3173 }
3174
3175 /*
3176 * Enable ECRC if possible
3177 */
3178 myri10ge_enable_ecrc(mgp);
3179
3180 /*
3181 * Run a DMA test which watches for unaligned completions and
3182 * aborts on the first one seen.
3183 */
3184
3185 status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST);
3186 if (status == 0)
3187 return; /* keep the aligned firmware */
3188
3189 if (status != -E2BIG)
3190 dev_warn(dev, "DMA test failed: %d\n", status);
3191 if (status == -ENOSYS)
3192 dev_warn(dev, "Falling back to ethp! "
3193 "Please install up to date fw\n");
3194 abort:
3195 /* fall back to using the unaligned firmware */
3196 mgp->tx_boundary = 2048;
3197 set_fw_name(mgp, myri10ge_fw_unaligned, false);
3198 }
3199
3200 static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
3201 {
3202 int overridden = 0;
3203
3204 if (myri10ge_force_firmware == 0) {
3205 int link_width;
3206 u16 lnk;
3207
3208 pcie_capability_read_word(mgp->pdev, PCI_EXP_LNKSTA, &lnk);
3209 link_width = (lnk >> 4) & 0x3f;
3210
3211 /* Check to see if Link is less than 8 or if the
3212 * upstream bridge is known to provide aligned
3213 * completions */
3214 if (link_width < 8) {
3215 dev_info(&mgp->pdev->dev, "PCIE x%d Link\n",
3216 link_width);
3217 mgp->tx_boundary = 4096;
3218 set_fw_name(mgp, myri10ge_fw_aligned, false);
3219 } else {
3220 myri10ge_firmware_probe(mgp);
3221 }
3222 } else {
3223 if (myri10ge_force_firmware == 1) {
3224 dev_info(&mgp->pdev->dev,
3225 "Assuming aligned completions (forced)\n");
3226 mgp->tx_boundary = 4096;
3227 set_fw_name(mgp, myri10ge_fw_aligned, false);
3228 } else {
3229 dev_info(&mgp->pdev->dev,
3230 "Assuming unaligned completions (forced)\n");
3231 mgp->tx_boundary = 2048;
3232 set_fw_name(mgp, myri10ge_fw_unaligned, false);
3233 }
3234 }
3235
3236 kernel_param_lock(THIS_MODULE);
3237 if (myri10ge_fw_name != NULL) {
3238 char *fw_name = kstrdup(myri10ge_fw_name, GFP_KERNEL);
3239 if (fw_name) {
3240 overridden = 1;
3241 set_fw_name(mgp, fw_name, true);
3242 }
3243 }
3244 kernel_param_unlock(THIS_MODULE);
3245
3246 if (mgp->board_number < MYRI10GE_MAX_BOARDS &&
3247 myri10ge_fw_names[mgp->board_number] != NULL &&
3248 strlen(myri10ge_fw_names[mgp->board_number])) {
3249 set_fw_name(mgp, myri10ge_fw_names[mgp->board_number], false);
3250 overridden = 1;
3251 }
3252 if (overridden)
3253 dev_info(&mgp->pdev->dev, "overriding firmware to %s\n",
3254 mgp->fw_name);
3255 }
3256
3257 static void myri10ge_mask_surprise_down(struct pci_dev *pdev)
3258 {
3259 struct pci_dev *bridge = pdev->bus->self;
3260 int cap;
3261 u32 mask;
3262
3263 if (bridge == NULL)
3264 return;
3265
3266 cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
3267 if (cap) {
3268 /* a sram parity error can cause a surprise link
3269 * down; since we expect and can recover from sram
3270 * parity errors, mask surprise link down events */
3271 pci_read_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, &mask);
3272 mask |= 0x20;
3273 pci_write_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, mask);
3274 }
3275 }
3276
3277 #ifdef CONFIG_PM
3278 static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state)
3279 {
3280 struct myri10ge_priv *mgp;
3281 struct net_device *netdev;
3282
3283 mgp = pci_get_drvdata(pdev);
3284 if (mgp == NULL)
3285 return -EINVAL;
3286 netdev = mgp->dev;
3287
3288 netif_device_detach(netdev);
3289 if (netif_running(netdev)) {
3290 netdev_info(netdev, "closing\n");
3291 rtnl_lock();
3292 myri10ge_close(netdev);
3293 rtnl_unlock();
3294 }
3295 myri10ge_dummy_rdma(mgp, 0);
3296 pci_save_state(pdev);
3297 pci_disable_device(pdev);
3298
3299 return pci_set_power_state(pdev, pci_choose_state(pdev, state));
3300 }
3301
3302 static int myri10ge_resume(struct pci_dev *pdev)
3303 {
3304 struct myri10ge_priv *mgp;
3305 struct net_device *netdev;
3306 int status;
3307 u16 vendor;
3308
3309 mgp = pci_get_drvdata(pdev);
3310 if (mgp == NULL)
3311 return -EINVAL;
3312 netdev = mgp->dev;
3313 pci_set_power_state(pdev, PCI_D0); /* zeros conf space as a side effect */
3314 msleep(5); /* give card time to respond */
3315 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3316 if (vendor == 0xffff) {
3317 netdev_err(mgp->dev, "device disappeared!\n");
3318 return -EIO;
3319 }
3320
3321 pci_restore_state(pdev);
3322
3323 status = pci_enable_device(pdev);
3324 if (status) {
3325 dev_err(&pdev->dev, "failed to enable device\n");
3326 return status;
3327 }
3328
3329 pci_set_master(pdev);
3330
3331 myri10ge_reset(mgp);
3332 myri10ge_dummy_rdma(mgp, 1);
3333
3334 /* Save configuration space to be restored if the
3335 * nic resets due to a parity error */
3336 pci_save_state(pdev);
3337
3338 if (netif_running(netdev)) {
3339 rtnl_lock();
3340 status = myri10ge_open(netdev);
3341 rtnl_unlock();
3342 if (status != 0)
3343 goto abort_with_enabled;
3344
3345 }
3346 netif_device_attach(netdev);
3347
3348 return 0;
3349
3350 abort_with_enabled:
3351 pci_disable_device(pdev);
3352 return -EIO;
3353
3354 }
3355 #endif /* CONFIG_PM */
3356
3357 static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp)
3358 {
3359 struct pci_dev *pdev = mgp->pdev;
3360 int vs = mgp->vendor_specific_offset;
3361 u32 reboot;
3362
3363 /*enter read32 mode */
3364 pci_write_config_byte(pdev, vs + 0x10, 0x3);
3365
3366 /*read REBOOT_STATUS (0xfffffff0) */
3367 pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0);
3368 pci_read_config_dword(pdev, vs + 0x14, &reboot);
3369 return reboot;
3370 }
3371
3372 static void
3373 myri10ge_check_slice(struct myri10ge_slice_state *ss, int *reset_needed,
3374 int *busy_slice_cnt, u32 rx_pause_cnt)
3375 {
3376 struct myri10ge_priv *mgp = ss->mgp;
3377 int slice = ss - mgp->ss;
3378
3379 if (ss->tx.req != ss->tx.done &&
3380 ss->tx.done == ss->watchdog_tx_done &&
3381 ss->watchdog_tx_req != ss->watchdog_tx_done) {
3382 /* nic seems like it might be stuck.. */
3383 if (rx_pause_cnt != mgp->watchdog_pause) {
3384 if (net_ratelimit())
3385 netdev_warn(mgp->dev, "slice %d: TX paused, "
3386 "check link partner\n", slice);
3387 } else {
3388 netdev_warn(mgp->dev,
3389 "slice %d: TX stuck %d %d %d %d %d %d\n",
3390 slice, ss->tx.queue_active, ss->tx.req,
3391 ss->tx.done, ss->tx.pkt_start,
3392 ss->tx.pkt_done,
3393 (int)ntohl(mgp->ss[slice].fw_stats->
3394 send_done_count));
3395 *reset_needed = 1;
3396 ss->stuck = 1;
3397 }
3398 }
3399 if (ss->watchdog_tx_done != ss->tx.done ||
3400 ss->watchdog_rx_done != ss->rx_done.cnt) {
3401 *busy_slice_cnt += 1;
3402 }
3403 ss->watchdog_tx_done = ss->tx.done;
3404 ss->watchdog_tx_req = ss->tx.req;
3405 ss->watchdog_rx_done = ss->rx_done.cnt;
3406 }
3407
3408 /*
3409 * This watchdog is used to check whether the board has suffered
3410 * from a parity error and needs to be recovered.
3411 */
3412 static void myri10ge_watchdog(struct work_struct *work)
3413 {
3414 struct myri10ge_priv *mgp =
3415 container_of(work, struct myri10ge_priv, watchdog_work);
3416 struct myri10ge_slice_state *ss;
3417 u32 reboot, rx_pause_cnt;
3418 int status, rebooted;
3419 int i;
3420 int reset_needed = 0;
3421 int busy_slice_cnt = 0;
3422 u16 cmd, vendor;
3423
3424 mgp->watchdog_resets++;
3425 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3426 rebooted = 0;
3427 if ((cmd & PCI_COMMAND_MASTER) == 0) {
3428 /* Bus master DMA disabled? Check to see
3429 * if the card rebooted due to a parity error
3430 * For now, just report it */
3431 reboot = myri10ge_read_reboot(mgp);
3432 netdev_err(mgp->dev, "NIC rebooted (0x%x),%s resetting\n",
3433 reboot, myri10ge_reset_recover ? "" : " not");
3434 if (myri10ge_reset_recover == 0)
3435 return;
3436 rtnl_lock();
3437 mgp->rebooted = 1;
3438 rebooted = 1;
3439 myri10ge_close(mgp->dev);
3440 myri10ge_reset_recover--;
3441 mgp->rebooted = 0;
3442 /*
3443 * A rebooted nic will come back with config space as
3444 * it was after power was applied to PCIe bus.
3445 * Attempt to restore config space which was saved
3446 * when the driver was loaded, or the last time the
3447 * nic was resumed from power saving mode.
3448 */
3449 pci_restore_state(mgp->pdev);
3450
3451 /* save state again for accounting reasons */
3452 pci_save_state(mgp->pdev);
3453
3454 } else {
3455 /* if we get back -1's from our slot, perhaps somebody
3456 * powered off our card. Don't try to reset it in
3457 * this case */
3458 if (cmd == 0xffff) {
3459 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3460 if (vendor == 0xffff) {
3461 netdev_err(mgp->dev, "device disappeared!\n");
3462 return;
3463 }
3464 }
3465 /* Perhaps it is a software error. See if stuck slice
3466 * has recovered, reset if not */
3467 rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3468 for (i = 0; i < mgp->num_slices; i++) {
3469 ss = mgp->ss;
3470 if (ss->stuck) {
3471 myri10ge_check_slice(ss, &reset_needed,
3472 &busy_slice_cnt,
3473 rx_pause_cnt);
3474 ss->stuck = 0;
3475 }
3476 }
3477 if (!reset_needed) {
3478 netdev_dbg(mgp->dev, "not resetting\n");
3479 return;
3480 }
3481
3482 netdev_err(mgp->dev, "device timeout, resetting\n");
3483 }
3484
3485 if (!rebooted) {
3486 rtnl_lock();
3487 myri10ge_close(mgp->dev);
3488 }
3489 status = myri10ge_load_firmware(mgp, 1);
3490 if (status != 0)
3491 netdev_err(mgp->dev, "failed to load firmware\n");
3492 else
3493 myri10ge_open(mgp->dev);
3494 rtnl_unlock();
3495 }
3496
3497 /*
3498 * We use our own timer routine rather than relying upon
3499 * netdev->tx_timeout because we have a very large hardware transmit
3500 * queue. Due to the large queue, the netdev->tx_timeout function
3501 * cannot detect a NIC with a parity error in a timely fashion if the
3502 * NIC is lightly loaded.
3503 */
3504 static void myri10ge_watchdog_timer(unsigned long arg)
3505 {
3506 struct myri10ge_priv *mgp;
3507 struct myri10ge_slice_state *ss;
3508 int i, reset_needed, busy_slice_cnt;
3509 u32 rx_pause_cnt;
3510 u16 cmd;
3511
3512 mgp = (struct myri10ge_priv *)arg;
3513
3514 rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3515 busy_slice_cnt = 0;
3516 for (i = 0, reset_needed = 0;
3517 i < mgp->num_slices && reset_needed == 0; ++i) {
3518
3519 ss = &mgp->ss[i];
3520 if (ss->rx_small.watchdog_needed) {
3521 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
3522 mgp->small_bytes + MXGEFW_PAD,
3523 1);
3524 if (ss->rx_small.fill_cnt - ss->rx_small.cnt >=
3525 myri10ge_fill_thresh)
3526 ss->rx_small.watchdog_needed = 0;
3527 }
3528 if (ss->rx_big.watchdog_needed) {
3529 myri10ge_alloc_rx_pages(mgp, &ss->rx_big,
3530 mgp->big_bytes, 1);
3531 if (ss->rx_big.fill_cnt - ss->rx_big.cnt >=
3532 myri10ge_fill_thresh)
3533 ss->rx_big.watchdog_needed = 0;
3534 }
3535 myri10ge_check_slice(ss, &reset_needed, &busy_slice_cnt,
3536 rx_pause_cnt);
3537 }
3538 /* if we've sent or received no traffic, poll the NIC to
3539 * ensure it is still there. Otherwise, we risk not noticing
3540 * an error in a timely fashion */
3541 if (busy_slice_cnt == 0) {
3542 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3543 if ((cmd & PCI_COMMAND_MASTER) == 0) {
3544 reset_needed = 1;
3545 }
3546 }
3547 mgp->watchdog_pause = rx_pause_cnt;
3548
3549 if (reset_needed) {
3550 schedule_work(&mgp->watchdog_work);
3551 } else {
3552 /* rearm timer */
3553 mod_timer(&mgp->watchdog_timer,
3554 jiffies + myri10ge_watchdog_timeout * HZ);
3555 }
3556 }
3557
3558 static void myri10ge_free_slices(struct myri10ge_priv *mgp)
3559 {
3560 struct myri10ge_slice_state *ss;
3561 struct pci_dev *pdev = mgp->pdev;
3562 size_t bytes;
3563 int i;
3564
3565 if (mgp->ss == NULL)
3566 return;
3567
3568 for (i = 0; i < mgp->num_slices; i++) {
3569 ss = &mgp->ss[i];
3570 if (ss->rx_done.entry != NULL) {
3571 bytes = mgp->max_intr_slots *
3572 sizeof(*ss->rx_done.entry);
3573 dma_free_coherent(&pdev->dev, bytes,
3574 ss->rx_done.entry, ss->rx_done.bus);
3575 ss->rx_done.entry = NULL;
3576 }
3577 if (ss->fw_stats != NULL) {
3578 bytes = sizeof(*ss->fw_stats);
3579 dma_free_coherent(&pdev->dev, bytes,
3580 ss->fw_stats, ss->fw_stats_bus);
3581 ss->fw_stats = NULL;
3582 }
3583 napi_hash_del(&ss->napi);
3584 netif_napi_del(&ss->napi);
3585 }
3586 /* Wait till napi structs are no longer used, and then free ss. */
3587 synchronize_rcu();
3588 kfree(mgp->ss);
3589 mgp->ss = NULL;
3590 }
3591
3592 static int myri10ge_alloc_slices(struct myri10ge_priv *mgp)
3593 {
3594 struct myri10ge_slice_state *ss;
3595 struct pci_dev *pdev = mgp->pdev;
3596 size_t bytes;
3597 int i;
3598
3599 bytes = sizeof(*mgp->ss) * mgp->num_slices;
3600 mgp->ss = kzalloc(bytes, GFP_KERNEL);
3601 if (mgp->ss == NULL) {
3602 return -ENOMEM;
3603 }
3604
3605 for (i = 0; i < mgp->num_slices; i++) {
3606 ss = &mgp->ss[i];
3607 bytes = mgp->max_intr_slots * sizeof(*ss->rx_done.entry);
3608 ss->rx_done.entry = dma_zalloc_coherent(&pdev->dev, bytes,
3609 &ss->rx_done.bus,
3610 GFP_KERNEL);
3611 if (ss->rx_done.entry == NULL)
3612 goto abort;
3613 bytes = sizeof(*ss->fw_stats);
3614 ss->fw_stats = dma_alloc_coherent(&pdev->dev, bytes,
3615 &ss->fw_stats_bus,
3616 GFP_KERNEL);
3617 if (ss->fw_stats == NULL)
3618 goto abort;
3619 ss->mgp = mgp;
3620 ss->dev = mgp->dev;
3621 netif_napi_add(ss->dev, &ss->napi, myri10ge_poll,
3622 myri10ge_napi_weight);
3623 }
3624 return 0;
3625 abort:
3626 myri10ge_free_slices(mgp);
3627 return -ENOMEM;
3628 }
3629
3630 /*
3631 * This function determines the number of slices supported.
3632 * The number slices is the minimum of the number of CPUS,
3633 * the number of MSI-X irqs supported, the number of slices
3634 * supported by the firmware
3635 */
3636 static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
3637 {
3638 struct myri10ge_cmd cmd;
3639 struct pci_dev *pdev = mgp->pdev;
3640 char *old_fw;
3641 bool old_allocated;
3642 int i, status, ncpus;
3643
3644 mgp->num_slices = 1;
3645 ncpus = netif_get_num_default_rss_queues();
3646
3647 if (myri10ge_max_slices == 1 || !pdev->msix_cap ||
3648 (myri10ge_max_slices == -1 && ncpus < 2))
3649 return;
3650
3651 /* try to load the slice aware rss firmware */
3652 old_fw = mgp->fw_name;
3653 old_allocated = mgp->fw_name_allocated;
3654 /* don't free old_fw if we override it. */
3655 mgp->fw_name_allocated = false;
3656
3657 if (myri10ge_fw_name != NULL) {
3658 dev_info(&mgp->pdev->dev, "overriding rss firmware to %s\n",
3659 myri10ge_fw_name);
3660 set_fw_name(mgp, myri10ge_fw_name, false);
3661 } else if (old_fw == myri10ge_fw_aligned)
3662 set_fw_name(mgp, myri10ge_fw_rss_aligned, false);
3663 else
3664 set_fw_name(mgp, myri10ge_fw_rss_unaligned, false);
3665 status = myri10ge_load_firmware(mgp, 0);
3666 if (status != 0) {
3667 dev_info(&pdev->dev, "Rss firmware not found\n");
3668 if (old_allocated)
3669 kfree(old_fw);
3670 return;
3671 }
3672
3673 /* hit the board with a reset to ensure it is alive */
3674 memset(&cmd, 0, sizeof(cmd));
3675 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
3676 if (status != 0) {
3677 dev_err(&mgp->pdev->dev, "failed reset\n");
3678 goto abort_with_fw;
3679 }
3680
3681 mgp->max_intr_slots = cmd.data0 / sizeof(struct mcp_slot);
3682
3683 /* tell it the size of the interrupt queues */
3684 cmd.data0 = mgp->max_intr_slots * sizeof(struct mcp_slot);
3685 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
3686 if (status != 0) {
3687 dev_err(&mgp->pdev->dev, "failed MXGEFW_CMD_SET_INTRQ_SIZE\n");
3688 goto abort_with_fw;
3689 }
3690
3691 /* ask the maximum number of slices it supports */
3692 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES, &cmd, 0);
3693 if (status != 0)
3694 goto abort_with_fw;
3695 else
3696 mgp->num_slices = cmd.data0;
3697
3698 /* Only allow multiple slices if MSI-X is usable */
3699 if (!myri10ge_msi) {
3700 goto abort_with_fw;
3701 }
3702
3703 /* if the admin did not specify a limit to how many
3704 * slices we should use, cap it automatically to the
3705 * number of CPUs currently online */
3706 if (myri10ge_max_slices == -1)
3707 myri10ge_max_slices = ncpus;
3708
3709 if (mgp->num_slices > myri10ge_max_slices)
3710 mgp->num_slices = myri10ge_max_slices;
3711
3712 /* Now try to allocate as many MSI-X vectors as we have
3713 * slices. We give up on MSI-X if we can only get a single
3714 * vector. */
3715
3716 mgp->msix_vectors = kcalloc(mgp->num_slices, sizeof(*mgp->msix_vectors),
3717 GFP_KERNEL);
3718 if (mgp->msix_vectors == NULL)
3719 goto no_msix;
3720 for (i = 0; i < mgp->num_slices; i++) {
3721 mgp->msix_vectors[i].entry = i;
3722 }
3723
3724 while (mgp->num_slices > 1) {
3725 mgp->num_slices = rounddown_pow_of_two(mgp->num_slices);
3726 if (mgp->num_slices == 1)
3727 goto no_msix;
3728 status = pci_enable_msix_range(pdev,
3729 mgp->msix_vectors,
3730 mgp->num_slices,
3731 mgp->num_slices);
3732 if (status < 0)
3733 goto no_msix;
3734
3735 pci_disable_msix(pdev);
3736
3737 if (status == mgp->num_slices) {
3738 if (old_allocated)
3739 kfree(old_fw);
3740 return;
3741 } else {
3742 mgp->num_slices = status;
3743 }
3744 }
3745
3746 no_msix:
3747 if (mgp->msix_vectors != NULL) {
3748 kfree(mgp->msix_vectors);
3749 mgp->msix_vectors = NULL;
3750 }
3751
3752 abort_with_fw:
3753 mgp->num_slices = 1;
3754 set_fw_name(mgp, old_fw, old_allocated);
3755 myri10ge_load_firmware(mgp, 0);
3756 }
3757
3758 static const struct net_device_ops myri10ge_netdev_ops = {
3759 .ndo_open = myri10ge_open,
3760 .ndo_stop = myri10ge_close,
3761 .ndo_start_xmit = myri10ge_xmit,
3762 .ndo_get_stats64 = myri10ge_get_stats,
3763 .ndo_validate_addr = eth_validate_addr,
3764 .ndo_change_mtu = myri10ge_change_mtu,
3765 .ndo_set_rx_mode = myri10ge_set_multicast_list,
3766 .ndo_set_mac_address = myri10ge_set_mac_address,
3767 };
3768
3769 static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3770 {
3771 struct net_device *netdev;
3772 struct myri10ge_priv *mgp;
3773 struct device *dev = &pdev->dev;
3774 int i;
3775 int status = -ENXIO;
3776 int dac_enabled;
3777 unsigned hdr_offset, ss_offset;
3778 static int board_number;
3779
3780 netdev = alloc_etherdev_mq(sizeof(*mgp), MYRI10GE_MAX_SLICES);
3781 if (netdev == NULL)
3782 return -ENOMEM;
3783
3784 SET_NETDEV_DEV(netdev, &pdev->dev);
3785
3786 mgp = netdev_priv(netdev);
3787 mgp->dev = netdev;
3788 mgp->pdev = pdev;
3789 mgp->pause = myri10ge_flow_control;
3790 mgp->intr_coal_delay = myri10ge_intr_coal_delay;
3791 mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT);
3792 mgp->board_number = board_number;
3793 init_waitqueue_head(&mgp->down_wq);
3794
3795 if (pci_enable_device(pdev)) {
3796 dev_err(&pdev->dev, "pci_enable_device call failed\n");
3797 status = -ENODEV;
3798 goto abort_with_netdev;
3799 }
3800
3801 /* Find the vendor-specific cap so we can check
3802 * the reboot register later on */
3803 mgp->vendor_specific_offset
3804 = pci_find_capability(pdev, PCI_CAP_ID_VNDR);
3805
3806 /* Set our max read request to 4KB */
3807 status = pcie_set_readrq(pdev, 4096);
3808 if (status != 0) {
3809 dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n",
3810 status);
3811 goto abort_with_enabled;
3812 }
3813
3814 myri10ge_mask_surprise_down(pdev);
3815 pci_set_master(pdev);
3816 dac_enabled = 1;
3817 status = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
3818 if (status != 0) {
3819 dac_enabled = 0;
3820 dev_err(&pdev->dev,
3821 "64-bit pci address mask was refused, "
3822 "trying 32-bit\n");
3823 status = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3824 }
3825 if (status != 0) {
3826 dev_err(&pdev->dev, "Error %d setting DMA mask\n", status);
3827 goto abort_with_enabled;
3828 }
3829 (void)pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
3830 mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd),
3831 &mgp->cmd_bus, GFP_KERNEL);
3832 if (!mgp->cmd) {
3833 status = -ENOMEM;
3834 goto abort_with_enabled;
3835 }
3836
3837 mgp->board_span = pci_resource_len(pdev, 0);
3838 mgp->iomem_base = pci_resource_start(pdev, 0);
3839 mgp->wc_cookie = arch_phys_wc_add(mgp->iomem_base, mgp->board_span);
3840 mgp->sram = ioremap_wc(mgp->iomem_base, mgp->board_span);
3841 if (mgp->sram == NULL) {
3842 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n",
3843 mgp->board_span, mgp->iomem_base);
3844 status = -ENXIO;
3845 goto abort_with_mtrr;
3846 }
3847 hdr_offset =
3848 swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET)) & 0xffffc;
3849 ss_offset = hdr_offset + offsetof(struct mcp_gen_header, string_specs);
3850 mgp->sram_size = swab32(readl(mgp->sram + ss_offset));
3851 if (mgp->sram_size > mgp->board_span ||
3852 mgp->sram_size <= MYRI10GE_FW_OFFSET) {
3853 dev_err(&pdev->dev,
3854 "invalid sram_size %dB or board span %ldB\n",
3855 mgp->sram_size, mgp->board_span);
3856 goto abort_with_ioremap;
3857 }
3858 memcpy_fromio(mgp->eeprom_strings,
3859 mgp->sram + mgp->sram_size, MYRI10GE_EEPROM_STRINGS_SIZE);
3860 memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2);
3861 status = myri10ge_read_mac_addr(mgp);
3862 if (status)
3863 goto abort_with_ioremap;
3864
3865 for (i = 0; i < ETH_ALEN; i++)
3866 netdev->dev_addr[i] = mgp->mac_addr[i];
3867
3868 myri10ge_select_firmware(mgp);
3869
3870 status = myri10ge_load_firmware(mgp, 1);
3871 if (status != 0) {
3872 dev_err(&pdev->dev, "failed to load firmware\n");
3873 goto abort_with_ioremap;
3874 }
3875 myri10ge_probe_slices(mgp);
3876 status = myri10ge_alloc_slices(mgp);
3877 if (status != 0) {
3878 dev_err(&pdev->dev, "failed to alloc slice state\n");
3879 goto abort_with_firmware;
3880 }
3881 netif_set_real_num_tx_queues(netdev, mgp->num_slices);
3882 netif_set_real_num_rx_queues(netdev, mgp->num_slices);
3883 status = myri10ge_reset(mgp);
3884 if (status != 0) {
3885 dev_err(&pdev->dev, "failed reset\n");
3886 goto abort_with_slices;
3887 }
3888 #ifdef CONFIG_MYRI10GE_DCA
3889 myri10ge_setup_dca(mgp);
3890 #endif
3891 pci_set_drvdata(pdev, mgp);
3892
3893 /* MTU range: 68 - 9000 */
3894 netdev->min_mtu = ETH_MIN_MTU;
3895 netdev->max_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
3896
3897 if (myri10ge_initial_mtu > netdev->max_mtu)
3898 myri10ge_initial_mtu = netdev->max_mtu;
3899 if (myri10ge_initial_mtu < netdev->min_mtu)
3900 myri10ge_initial_mtu = netdev->min_mtu;
3901
3902 netdev->mtu = myri10ge_initial_mtu;
3903
3904 netdev->netdev_ops = &myri10ge_netdev_ops;
3905 netdev->hw_features = mgp->features | NETIF_F_RXCSUM;
3906
3907 /* fake NETIF_F_HW_VLAN_CTAG_RX for good GRO performance */
3908 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
3909
3910 netdev->features = netdev->hw_features;
3911
3912 if (dac_enabled)
3913 netdev->features |= NETIF_F_HIGHDMA;
3914
3915 netdev->vlan_features |= mgp->features;
3916 if (mgp->fw_ver_tiny < 37)
3917 netdev->vlan_features &= ~NETIF_F_TSO6;
3918 if (mgp->fw_ver_tiny < 32)
3919 netdev->vlan_features &= ~NETIF_F_TSO;
3920
3921 /* make sure we can get an irq, and that MSI can be
3922 * setup (if available). */
3923 status = myri10ge_request_irq(mgp);
3924 if (status != 0)
3925 goto abort_with_firmware;
3926 myri10ge_free_irq(mgp);
3927
3928 /* Save configuration space to be restored if the
3929 * nic resets due to a parity error */
3930 pci_save_state(pdev);
3931
3932 /* Setup the watchdog timer */
3933 setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer,
3934 (unsigned long)mgp);
3935
3936 netdev->ethtool_ops = &myri10ge_ethtool_ops;
3937 INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog);
3938 status = register_netdev(netdev);
3939 if (status != 0) {
3940 dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
3941 goto abort_with_state;
3942 }
3943 if (mgp->msix_enabled)
3944 dev_info(dev, "%d MSI-X IRQs, tx bndry %d, fw %s, MTRR %s, WC Enabled\n",
3945 mgp->num_slices, mgp->tx_boundary, mgp->fw_name,
3946 (mgp->wc_cookie > 0 ? "Enabled" : "Disabled"));
3947 else
3948 dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, MTRR %s, WC Enabled\n",
3949 mgp->msi_enabled ? "MSI" : "xPIC",
3950 pdev->irq, mgp->tx_boundary, mgp->fw_name,
3951 (mgp->wc_cookie > 0 ? "Enabled" : "Disabled"));
3952
3953 board_number++;
3954 return 0;
3955
3956 abort_with_state:
3957 pci_restore_state(pdev);
3958
3959 abort_with_slices:
3960 myri10ge_free_slices(mgp);
3961
3962 abort_with_firmware:
3963 myri10ge_dummy_rdma(mgp, 0);
3964
3965 abort_with_ioremap:
3966 if (mgp->mac_addr_string != NULL)
3967 dev_err(&pdev->dev,
3968 "myri10ge_probe() failed: MAC=%s, SN=%ld\n",
3969 mgp->mac_addr_string, mgp->serial_number);
3970 iounmap(mgp->sram);
3971
3972 abort_with_mtrr:
3973 arch_phys_wc_del(mgp->wc_cookie);
3974 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
3975 mgp->cmd, mgp->cmd_bus);
3976
3977 abort_with_enabled:
3978 pci_disable_device(pdev);
3979
3980 abort_with_netdev:
3981 set_fw_name(mgp, NULL, false);
3982 free_netdev(netdev);
3983 return status;
3984 }
3985
3986 /*
3987 * myri10ge_remove
3988 *
3989 * Does what is necessary to shutdown one Myrinet device. Called
3990 * once for each Myrinet card by the kernel when a module is
3991 * unloaded.
3992 */
3993 static void myri10ge_remove(struct pci_dev *pdev)
3994 {
3995 struct myri10ge_priv *mgp;
3996 struct net_device *netdev;
3997
3998 mgp = pci_get_drvdata(pdev);
3999 if (mgp == NULL)
4000 return;
4001
4002 cancel_work_sync(&mgp->watchdog_work);
4003 netdev = mgp->dev;
4004 unregister_netdev(netdev);
4005
4006 #ifdef CONFIG_MYRI10GE_DCA
4007 myri10ge_teardown_dca(mgp);
4008 #endif
4009 myri10ge_dummy_rdma(mgp, 0);
4010
4011 /* avoid a memory leak */
4012 pci_restore_state(pdev);
4013
4014 iounmap(mgp->sram);
4015 arch_phys_wc_del(mgp->wc_cookie);
4016 myri10ge_free_slices(mgp);
4017 kfree(mgp->msix_vectors);
4018 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
4019 mgp->cmd, mgp->cmd_bus);
4020
4021 set_fw_name(mgp, NULL, false);
4022 free_netdev(netdev);
4023 pci_disable_device(pdev);
4024 }
4025
4026 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E 0x0008
4027 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9 0x0009
4028
4029 static const struct pci_device_id myri10ge_pci_tbl[] = {
4030 {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)},
4031 {PCI_DEVICE
4032 (PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9)},
4033 {0},
4034 };
4035
4036 MODULE_DEVICE_TABLE(pci, myri10ge_pci_tbl);
4037
4038 static struct pci_driver myri10ge_driver = {
4039 .name = "myri10ge",
4040 .probe = myri10ge_probe,
4041 .remove = myri10ge_remove,
4042 .id_table = myri10ge_pci_tbl,
4043 #ifdef CONFIG_PM
4044 .suspend = myri10ge_suspend,
4045 .resume = myri10ge_resume,
4046 #endif
4047 };
4048
4049 #ifdef CONFIG_MYRI10GE_DCA
4050 static int
4051 myri10ge_notify_dca(struct notifier_block *nb, unsigned long event, void *p)
4052 {
4053 int err = driver_for_each_device(&myri10ge_driver.driver,
4054 NULL, &event,
4055 myri10ge_notify_dca_device);
4056
4057 if (err)
4058 return NOTIFY_BAD;
4059 return NOTIFY_DONE;
4060 }
4061
4062 static struct notifier_block myri10ge_dca_notifier = {
4063 .notifier_call = myri10ge_notify_dca,
4064 .next = NULL,
4065 .priority = 0,
4066 };
4067 #endif /* CONFIG_MYRI10GE_DCA */
4068
4069 static __init int myri10ge_init_module(void)
4070 {
4071 pr_info("Version %s\n", MYRI10GE_VERSION_STR);
4072
4073 if (myri10ge_rss_hash > MXGEFW_RSS_HASH_TYPE_MAX) {
4074 pr_err("Illegal rssh hash type %d, defaulting to source port\n",
4075 myri10ge_rss_hash);
4076 myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT;
4077 }
4078 #ifdef CONFIG_MYRI10GE_DCA
4079 dca_register_notify(&myri10ge_dca_notifier);
4080 #endif
4081 if (myri10ge_max_slices > MYRI10GE_MAX_SLICES)
4082 myri10ge_max_slices = MYRI10GE_MAX_SLICES;
4083
4084 return pci_register_driver(&myri10ge_driver);
4085 }
4086
4087 module_init(myri10ge_init_module);
4088
4089 static __exit void myri10ge_cleanup_module(void)
4090 {
4091 #ifdef CONFIG_MYRI10GE_DCA
4092 dca_unregister_notify(&myri10ge_dca_notifier);
4093 #endif
4094 pci_unregister_driver(&myri10ge_driver);
4095 }
4096
4097 module_exit(myri10ge_cleanup_module);
Linux with added FPC-III support