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myri10ge: check for DMA mapping errors
[mirror_ubuntu-artful-kernel.git] / drivers / net / ethernet / myricom / myri10ge / myri10ge.c
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/io.h>
73 #include <asm/processor.h>
74 #ifdef CONFIG_MTRR
75 #include <asm/mtrr.h>
76 #endif
77 #include <net/busy_poll.h>
78
79 #include "myri10ge_mcp.h"
80 #include "myri10ge_mcp_gen_header.h"
81
82 #define MYRI10GE_VERSION_STR "1.5.3-1.534"
83
84 MODULE_DESCRIPTION("Myricom 10G driver (10GbE)");
85 MODULE_AUTHOR("Maintainer: help@myri.com");
86 MODULE_VERSION(MYRI10GE_VERSION_STR);
87 MODULE_LICENSE("Dual BSD/GPL");
88
89 #define MYRI10GE_MAX_ETHER_MTU 9014
90
91 #define MYRI10GE_ETH_STOPPED 0
92 #define MYRI10GE_ETH_STOPPING 1
93 #define MYRI10GE_ETH_STARTING 2
94 #define MYRI10GE_ETH_RUNNING 3
95 #define MYRI10GE_ETH_OPEN_FAILED 4
96
97 #define MYRI10GE_EEPROM_STRINGS_SIZE 256
98 #define MYRI10GE_MAX_SEND_DESC_TSO ((65536 / 2048) * 2)
99
100 #define MYRI10GE_NO_CONFIRM_DATA htonl(0xffffffff)
101 #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff
102
103 #define MYRI10GE_ALLOC_ORDER 0
104 #define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE)
105 #define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1)
106
107 #define MYRI10GE_MAX_SLICES 32
108
109 struct myri10ge_rx_buffer_state {
110 struct page *page;
111 int page_offset;
112 DEFINE_DMA_UNMAP_ADDR(bus);
113 DEFINE_DMA_UNMAP_LEN(len);
114 };
115
116 struct myri10ge_tx_buffer_state {
117 struct sk_buff *skb;
118 int last;
119 DEFINE_DMA_UNMAP_ADDR(bus);
120 DEFINE_DMA_UNMAP_LEN(len);
121 };
122
123 struct myri10ge_cmd {
124 u32 data0;
125 u32 data1;
126 u32 data2;
127 };
128
129 struct myri10ge_rx_buf {
130 struct mcp_kreq_ether_recv __iomem *lanai; /* lanai ptr for recv ring */
131 struct mcp_kreq_ether_recv *shadow; /* host shadow of recv ring */
132 struct myri10ge_rx_buffer_state *info;
133 struct page *page;
134 dma_addr_t bus;
135 int page_offset;
136 int cnt;
137 int fill_cnt;
138 int alloc_fail;
139 int mask; /* number of rx slots -1 */
140 int watchdog_needed;
141 };
142
143 struct myri10ge_tx_buf {
144 struct mcp_kreq_ether_send __iomem *lanai; /* lanai ptr for sendq */
145 __be32 __iomem *send_go; /* "go" doorbell ptr */
146 __be32 __iomem *send_stop; /* "stop" doorbell ptr */
147 struct mcp_kreq_ether_send *req_list; /* host shadow of sendq */
148 char *req_bytes;
149 struct myri10ge_tx_buffer_state *info;
150 int mask; /* number of transmit slots -1 */
151 int req ____cacheline_aligned; /* transmit slots submitted */
152 int pkt_start; /* packets started */
153 int stop_queue;
154 int linearized;
155 int done ____cacheline_aligned; /* transmit slots completed */
156 int pkt_done; /* packets completed */
157 int wake_queue;
158 int queue_active;
159 };
160
161 struct myri10ge_rx_done {
162 struct mcp_slot *entry;
163 dma_addr_t bus;
164 int cnt;
165 int idx;
166 };
167
168 struct myri10ge_slice_netstats {
169 unsigned long rx_packets;
170 unsigned long tx_packets;
171 unsigned long rx_bytes;
172 unsigned long tx_bytes;
173 unsigned long rx_dropped;
174 unsigned long tx_dropped;
175 };
176
177 struct myri10ge_slice_state {
178 struct myri10ge_tx_buf tx; /* transmit ring */
179 struct myri10ge_rx_buf rx_small;
180 struct myri10ge_rx_buf rx_big;
181 struct myri10ge_rx_done rx_done;
182 struct net_device *dev;
183 struct napi_struct napi;
184 struct myri10ge_priv *mgp;
185 struct myri10ge_slice_netstats stats;
186 __be32 __iomem *irq_claim;
187 struct mcp_irq_data *fw_stats;
188 dma_addr_t fw_stats_bus;
189 int watchdog_tx_done;
190 int watchdog_tx_req;
191 int watchdog_rx_done;
192 int stuck;
193 #ifdef CONFIG_MYRI10GE_DCA
194 int cached_dca_tag;
195 int cpu;
196 __be32 __iomem *dca_tag;
197 #endif
198 #ifdef CONFIG_NET_RX_BUSY_POLL
199 unsigned int state;
200 #define SLICE_STATE_IDLE 0
201 #define SLICE_STATE_NAPI 1 /* NAPI owns this slice */
202 #define SLICE_STATE_POLL 2 /* poll owns this slice */
203 #define SLICE_LOCKED (SLICE_STATE_NAPI | SLICE_STATE_POLL)
204 #define SLICE_STATE_NAPI_YIELD 4 /* NAPI yielded this slice */
205 #define SLICE_STATE_POLL_YIELD 8 /* poll yielded this slice */
206 #define SLICE_USER_PEND (SLICE_STATE_POLL | SLICE_STATE_POLL_YIELD)
207 spinlock_t lock;
208 unsigned long lock_napi_yield;
209 unsigned long lock_poll_yield;
210 unsigned long busy_poll_miss;
211 unsigned long busy_poll_cnt;
212 #endif /* CONFIG_NET_RX_BUSY_POLL */
213 char irq_desc[32];
214 };
215
216 struct myri10ge_priv {
217 struct myri10ge_slice_state *ss;
218 int tx_boundary; /* boundary transmits cannot cross */
219 int num_slices;
220 int running; /* running? */
221 int small_bytes;
222 int big_bytes;
223 int max_intr_slots;
224 struct net_device *dev;
225 u8 __iomem *sram;
226 int sram_size;
227 unsigned long board_span;
228 unsigned long iomem_base;
229 __be32 __iomem *irq_deassert;
230 char *mac_addr_string;
231 struct mcp_cmd_response *cmd;
232 dma_addr_t cmd_bus;
233 struct pci_dev *pdev;
234 int msi_enabled;
235 int msix_enabled;
236 struct msix_entry *msix_vectors;
237 #ifdef CONFIG_MYRI10GE_DCA
238 int dca_enabled;
239 int relaxed_order;
240 #endif
241 u32 link_state;
242 unsigned int rdma_tags_available;
243 int intr_coal_delay;
244 __be32 __iomem *intr_coal_delay_ptr;
245 int mtrr;
246 int wc_enabled;
247 int down_cnt;
248 wait_queue_head_t down_wq;
249 struct work_struct watchdog_work;
250 struct timer_list watchdog_timer;
251 int watchdog_resets;
252 int watchdog_pause;
253 int pause;
254 bool fw_name_allocated;
255 char *fw_name;
256 char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
257 char *product_code_string;
258 char fw_version[128];
259 int fw_ver_major;
260 int fw_ver_minor;
261 int fw_ver_tiny;
262 int adopted_rx_filter_bug;
263 u8 mac_addr[ETH_ALEN]; /* eeprom mac address */
264 unsigned long serial_number;
265 int vendor_specific_offset;
266 int fw_multicast_support;
267 u32 features;
268 u32 max_tso6;
269 u32 read_dma;
270 u32 write_dma;
271 u32 read_write_dma;
272 u32 link_changes;
273 u32 msg_enable;
274 unsigned int board_number;
275 int rebooted;
276 };
277
278 static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
279 static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
280 static char *myri10ge_fw_rss_unaligned = "myri10ge_rss_ethp_z8e.dat";
281 static char *myri10ge_fw_rss_aligned = "myri10ge_rss_eth_z8e.dat";
282 MODULE_FIRMWARE("myri10ge_ethp_z8e.dat");
283 MODULE_FIRMWARE("myri10ge_eth_z8e.dat");
284 MODULE_FIRMWARE("myri10ge_rss_ethp_z8e.dat");
285 MODULE_FIRMWARE("myri10ge_rss_eth_z8e.dat");
286
287 /* Careful: must be accessed under kparam_block_sysfs_write */
288 static char *myri10ge_fw_name = NULL;
289 module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR);
290 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name");
291
292 #define MYRI10GE_MAX_BOARDS 8
293 static char *myri10ge_fw_names[MYRI10GE_MAX_BOARDS] =
294 {[0 ... (MYRI10GE_MAX_BOARDS - 1)] = NULL };
295 module_param_array_named(myri10ge_fw_names, myri10ge_fw_names, charp, NULL,
296 0444);
297 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image names per board");
298
299 static int myri10ge_ecrc_enable = 1;
300 module_param(myri10ge_ecrc_enable, int, S_IRUGO);
301 MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E");
302
303 static int myri10ge_small_bytes = -1; /* -1 == auto */
304 module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR);
305 MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets");
306
307 static int myri10ge_msi = 1; /* enable msi by default */
308 module_param(myri10ge_msi, int, S_IRUGO | S_IWUSR);
309 MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts");
310
311 static int myri10ge_intr_coal_delay = 75;
312 module_param(myri10ge_intr_coal_delay, int, S_IRUGO);
313 MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay");
314
315 static int myri10ge_flow_control = 1;
316 module_param(myri10ge_flow_control, int, S_IRUGO);
317 MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter");
318
319 static int myri10ge_deassert_wait = 1;
320 module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR);
321 MODULE_PARM_DESC(myri10ge_deassert_wait,
322 "Wait when deasserting legacy interrupts");
323
324 static int myri10ge_force_firmware = 0;
325 module_param(myri10ge_force_firmware, int, S_IRUGO);
326 MODULE_PARM_DESC(myri10ge_force_firmware,
327 "Force firmware to assume aligned completions");
328
329 static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
330 module_param(myri10ge_initial_mtu, int, S_IRUGO);
331 MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU");
332
333 static int myri10ge_napi_weight = 64;
334 module_param(myri10ge_napi_weight, int, S_IRUGO);
335 MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight");
336
337 static int myri10ge_watchdog_timeout = 1;
338 module_param(myri10ge_watchdog_timeout, int, S_IRUGO);
339 MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout");
340
341 static int myri10ge_max_irq_loops = 1048576;
342 module_param(myri10ge_max_irq_loops, int, S_IRUGO);
343 MODULE_PARM_DESC(myri10ge_max_irq_loops,
344 "Set stuck legacy IRQ detection threshold");
345
346 #define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK
347
348 static int myri10ge_debug = -1; /* defaults above */
349 module_param(myri10ge_debug, int, 0);
350 MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)");
351
352 static int myri10ge_fill_thresh = 256;
353 module_param(myri10ge_fill_thresh, int, S_IRUGO | S_IWUSR);
354 MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed");
355
356 static int myri10ge_reset_recover = 1;
357
358 static int myri10ge_max_slices = 1;
359 module_param(myri10ge_max_slices, int, S_IRUGO);
360 MODULE_PARM_DESC(myri10ge_max_slices, "Max tx/rx queues");
361
362 static int myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_DST_PORT;
363 module_param(myri10ge_rss_hash, int, S_IRUGO);
364 MODULE_PARM_DESC(myri10ge_rss_hash, "Type of RSS hashing to do");
365
366 static int myri10ge_dca = 1;
367 module_param(myri10ge_dca, int, S_IRUGO);
368 MODULE_PARM_DESC(myri10ge_dca, "Enable DCA if possible");
369
370 #define MYRI10GE_FW_OFFSET 1024*1024
371 #define MYRI10GE_HIGHPART_TO_U32(X) \
372 (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0)
373 #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X))
374
375 #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8)
376
377 static void myri10ge_set_multicast_list(struct net_device *dev);
378 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
379 struct net_device *dev);
380
381 static inline void put_be32(__be32 val, __be32 __iomem * p)
382 {
383 __raw_writel((__force __u32) val, (__force void __iomem *)p);
384 }
385
386 static struct rtnl_link_stats64 *myri10ge_get_stats(struct net_device *dev,
387 struct rtnl_link_stats64 *stats);
388
389 static void set_fw_name(struct myri10ge_priv *mgp, char *name, bool allocated)
390 {
391 if (mgp->fw_name_allocated)
392 kfree(mgp->fw_name);
393 mgp->fw_name = name;
394 mgp->fw_name_allocated = allocated;
395 }
396
397 static int
398 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
399 struct myri10ge_cmd *data, int atomic)
400 {
401 struct mcp_cmd *buf;
402 char buf_bytes[sizeof(*buf) + 8];
403 struct mcp_cmd_response *response = mgp->cmd;
404 char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD;
405 u32 dma_low, dma_high, result, value;
406 int sleep_total = 0;
407
408 /* ensure buf is aligned to 8 bytes */
409 buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8);
410
411 buf->data0 = htonl(data->data0);
412 buf->data1 = htonl(data->data1);
413 buf->data2 = htonl(data->data2);
414 buf->cmd = htonl(cmd);
415 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
416 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
417
418 buf->response_addr.low = htonl(dma_low);
419 buf->response_addr.high = htonl(dma_high);
420 response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT);
421 mb();
422 myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf));
423
424 /* wait up to 15ms. Longest command is the DMA benchmark,
425 * which is capped at 5ms, but runs from a timeout handler
426 * that runs every 7.8ms. So a 15ms timeout leaves us with
427 * a 2.2ms margin
428 */
429 if (atomic) {
430 /* if atomic is set, do not sleep,
431 * and try to get the completion quickly
432 * (1ms will be enough for those commands) */
433 for (sleep_total = 0;
434 sleep_total < 1000 &&
435 response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
436 sleep_total += 10) {
437 udelay(10);
438 mb();
439 }
440 } else {
441 /* use msleep for most command */
442 for (sleep_total = 0;
443 sleep_total < 15 &&
444 response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
445 sleep_total++)
446 msleep(1);
447 }
448
449 result = ntohl(response->result);
450 value = ntohl(response->data);
451 if (result != MYRI10GE_NO_RESPONSE_RESULT) {
452 if (result == 0) {
453 data->data0 = value;
454 return 0;
455 } else if (result == MXGEFW_CMD_UNKNOWN) {
456 return -ENOSYS;
457 } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) {
458 return -E2BIG;
459 } else if (result == MXGEFW_CMD_ERROR_RANGE &&
460 cmd == MXGEFW_CMD_ENABLE_RSS_QUEUES &&
461 (data->
462 data1 & MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES) !=
463 0) {
464 return -ERANGE;
465 } else {
466 dev_err(&mgp->pdev->dev,
467 "command %d failed, result = %d\n",
468 cmd, result);
469 return -ENXIO;
470 }
471 }
472
473 dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
474 cmd, result);
475 return -EAGAIN;
476 }
477
478 /*
479 * The eeprom strings on the lanaiX have the format
480 * SN=x\0
481 * MAC=x:x:x:x:x:x\0
482 * PT:ddd mmm xx xx:xx:xx xx\0
483 * PV:ddd mmm xx xx:xx:xx xx\0
484 */
485 static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp)
486 {
487 char *ptr, *limit;
488 int i;
489
490 ptr = mgp->eeprom_strings;
491 limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE;
492
493 while (*ptr != '\0' && ptr < limit) {
494 if (memcmp(ptr, "MAC=", 4) == 0) {
495 ptr += 4;
496 mgp->mac_addr_string = ptr;
497 for (i = 0; i < 6; i++) {
498 if ((ptr + 2) > limit)
499 goto abort;
500 mgp->mac_addr[i] =
501 simple_strtoul(ptr, &ptr, 16);
502 ptr += 1;
503 }
504 }
505 if (memcmp(ptr, "PC=", 3) == 0) {
506 ptr += 3;
507 mgp->product_code_string = ptr;
508 }
509 if (memcmp((const void *)ptr, "SN=", 3) == 0) {
510 ptr += 3;
511 mgp->serial_number = simple_strtoul(ptr, &ptr, 10);
512 }
513 while (ptr < limit && *ptr++) ;
514 }
515
516 return 0;
517
518 abort:
519 dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n");
520 return -ENXIO;
521 }
522
523 /*
524 * Enable or disable periodic RDMAs from the host to make certain
525 * chipsets resend dropped PCIe messages
526 */
527
528 static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable)
529 {
530 char __iomem *submit;
531 __be32 buf[16] __attribute__ ((__aligned__(8)));
532 u32 dma_low, dma_high;
533 int i;
534
535 /* clear confirmation addr */
536 mgp->cmd->data = 0;
537 mb();
538
539 /* send a rdma command to the PCIe engine, and wait for the
540 * response in the confirmation address. The firmware should
541 * write a -1 there to indicate it is alive and well
542 */
543 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
544 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
545
546 buf[0] = htonl(dma_high); /* confirm addr MSW */
547 buf[1] = htonl(dma_low); /* confirm addr LSW */
548 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */
549 buf[3] = htonl(dma_high); /* dummy addr MSW */
550 buf[4] = htonl(dma_low); /* dummy addr LSW */
551 buf[5] = htonl(enable); /* enable? */
552
553 submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA;
554
555 myri10ge_pio_copy(submit, &buf, sizeof(buf));
556 for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++)
557 msleep(1);
558 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA)
559 dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n",
560 (enable ? "enable" : "disable"));
561 }
562
563 static int
564 myri10ge_validate_firmware(struct myri10ge_priv *mgp,
565 struct mcp_gen_header *hdr)
566 {
567 struct device *dev = &mgp->pdev->dev;
568
569 /* check firmware type */
570 if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) {
571 dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type));
572 return -EINVAL;
573 }
574
575 /* save firmware version for ethtool */
576 strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
577 mgp->fw_version[sizeof(mgp->fw_version) - 1] = '\0';
578
579 sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major,
580 &mgp->fw_ver_minor, &mgp->fw_ver_tiny);
581
582 if (!(mgp->fw_ver_major == MXGEFW_VERSION_MAJOR &&
583 mgp->fw_ver_minor == MXGEFW_VERSION_MINOR)) {
584 dev_err(dev, "Found firmware version %s\n", mgp->fw_version);
585 dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR,
586 MXGEFW_VERSION_MINOR);
587 return -EINVAL;
588 }
589 return 0;
590 }
591
592 static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
593 {
594 unsigned crc, reread_crc;
595 const struct firmware *fw;
596 struct device *dev = &mgp->pdev->dev;
597 unsigned char *fw_readback;
598 struct mcp_gen_header *hdr;
599 size_t hdr_offset;
600 int status;
601 unsigned i;
602
603 if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) {
604 dev_err(dev, "Unable to load %s firmware image via hotplug\n",
605 mgp->fw_name);
606 status = -EINVAL;
607 goto abort_with_nothing;
608 }
609
610 /* check size */
611
612 if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET ||
613 fw->size < MCP_HEADER_PTR_OFFSET + 4) {
614 dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size);
615 status = -EINVAL;
616 goto abort_with_fw;
617 }
618
619 /* check id */
620 hdr_offset = ntohl(*(__be32 *) (fw->data + MCP_HEADER_PTR_OFFSET));
621 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) {
622 dev_err(dev, "Bad firmware file\n");
623 status = -EINVAL;
624 goto abort_with_fw;
625 }
626 hdr = (void *)(fw->data + hdr_offset);
627
628 status = myri10ge_validate_firmware(mgp, hdr);
629 if (status != 0)
630 goto abort_with_fw;
631
632 crc = crc32(~0, fw->data, fw->size);
633 for (i = 0; i < fw->size; i += 256) {
634 myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i,
635 fw->data + i,
636 min(256U, (unsigned)(fw->size - i)));
637 mb();
638 readb(mgp->sram);
639 }
640 fw_readback = vmalloc(fw->size);
641 if (!fw_readback) {
642 status = -ENOMEM;
643 goto abort_with_fw;
644 }
645 /* corruption checking is good for parity recovery and buggy chipset */
646 memcpy_fromio(fw_readback, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);
647 reread_crc = crc32(~0, fw_readback, fw->size);
648 vfree(fw_readback);
649 if (crc != reread_crc) {
650 dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n",
651 (unsigned)fw->size, reread_crc, crc);
652 status = -EIO;
653 goto abort_with_fw;
654 }
655 *size = (u32) fw->size;
656
657 abort_with_fw:
658 release_firmware(fw);
659
660 abort_with_nothing:
661 return status;
662 }
663
664 static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp)
665 {
666 struct mcp_gen_header *hdr;
667 struct device *dev = &mgp->pdev->dev;
668 const size_t bytes = sizeof(struct mcp_gen_header);
669 size_t hdr_offset;
670 int status;
671
672 /* find running firmware header */
673 hdr_offset = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
674
675 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) {
676 dev_err(dev, "Running firmware has bad header offset (%d)\n",
677 (int)hdr_offset);
678 return -EIO;
679 }
680
681 /* copy header of running firmware from SRAM to host memory to
682 * validate firmware */
683 hdr = kmalloc(bytes, GFP_KERNEL);
684 if (hdr == NULL)
685 return -ENOMEM;
686
687 memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes);
688 status = myri10ge_validate_firmware(mgp, hdr);
689 kfree(hdr);
690
691 /* check to see if adopted firmware has bug where adopting
692 * it will cause broadcasts to be filtered unless the NIC
693 * is kept in ALLMULTI mode */
694 if (mgp->fw_ver_major == 1 && mgp->fw_ver_minor == 4 &&
695 mgp->fw_ver_tiny >= 4 && mgp->fw_ver_tiny <= 11) {
696 mgp->adopted_rx_filter_bug = 1;
697 dev_warn(dev, "Adopting fw %d.%d.%d: "
698 "working around rx filter bug\n",
699 mgp->fw_ver_major, mgp->fw_ver_minor,
700 mgp->fw_ver_tiny);
701 }
702 return status;
703 }
704
705 static int myri10ge_get_firmware_capabilities(struct myri10ge_priv *mgp)
706 {
707 struct myri10ge_cmd cmd;
708 int status;
709
710 /* probe for IPv6 TSO support */
711 mgp->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
712 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_TSO6_HDR_SIZE,
713 &cmd, 0);
714 if (status == 0) {
715 mgp->max_tso6 = cmd.data0;
716 mgp->features |= NETIF_F_TSO6;
717 }
718
719 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
720 if (status != 0) {
721 dev_err(&mgp->pdev->dev,
722 "failed MXGEFW_CMD_GET_RX_RING_SIZE\n");
723 return -ENXIO;
724 }
725
726 mgp->max_intr_slots = 2 * (cmd.data0 / sizeof(struct mcp_dma_addr));
727
728 return 0;
729 }
730
731 static int myri10ge_load_firmware(struct myri10ge_priv *mgp, int adopt)
732 {
733 char __iomem *submit;
734 __be32 buf[16] __attribute__ ((__aligned__(8)));
735 u32 dma_low, dma_high, size;
736 int status, i;
737
738 size = 0;
739 status = myri10ge_load_hotplug_firmware(mgp, &size);
740 if (status) {
741 if (!adopt)
742 return status;
743 dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n");
744
745 /* Do not attempt to adopt firmware if there
746 * was a bad crc */
747 if (status == -EIO)
748 return status;
749
750 status = myri10ge_adopt_running_firmware(mgp);
751 if (status != 0) {
752 dev_err(&mgp->pdev->dev,
753 "failed to adopt running firmware\n");
754 return status;
755 }
756 dev_info(&mgp->pdev->dev,
757 "Successfully adopted running firmware\n");
758 if (mgp->tx_boundary == 4096) {
759 dev_warn(&mgp->pdev->dev,
760 "Using firmware currently running on NIC"
761 ". For optimal\n");
762 dev_warn(&mgp->pdev->dev,
763 "performance consider loading optimized "
764 "firmware\n");
765 dev_warn(&mgp->pdev->dev, "via hotplug\n");
766 }
767
768 set_fw_name(mgp, "adopted", false);
769 mgp->tx_boundary = 2048;
770 myri10ge_dummy_rdma(mgp, 1);
771 status = myri10ge_get_firmware_capabilities(mgp);
772 return status;
773 }
774
775 /* clear confirmation addr */
776 mgp->cmd->data = 0;
777 mb();
778
779 /* send a reload command to the bootstrap MCP, and wait for the
780 * response in the confirmation address. The firmware should
781 * write a -1 there to indicate it is alive and well
782 */
783 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
784 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
785
786 buf[0] = htonl(dma_high); /* confirm addr MSW */
787 buf[1] = htonl(dma_low); /* confirm addr LSW */
788 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */
789
790 /* FIX: All newest firmware should un-protect the bottom of
791 * the sram before handoff. However, the very first interfaces
792 * do not. Therefore the handoff copy must skip the first 8 bytes
793 */
794 buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */
795 buf[4] = htonl(size - 8); /* length of code */
796 buf[5] = htonl(8); /* where to copy to */
797 buf[6] = htonl(0); /* where to jump to */
798
799 submit = mgp->sram + MXGEFW_BOOT_HANDOFF;
800
801 myri10ge_pio_copy(submit, &buf, sizeof(buf));
802 mb();
803 msleep(1);
804 mb();
805 i = 0;
806 while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 9) {
807 msleep(1 << i);
808 i++;
809 }
810 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) {
811 dev_err(&mgp->pdev->dev, "handoff failed\n");
812 return -ENXIO;
813 }
814 myri10ge_dummy_rdma(mgp, 1);
815 status = myri10ge_get_firmware_capabilities(mgp);
816
817 return status;
818 }
819
820 static int myri10ge_update_mac_address(struct myri10ge_priv *mgp, u8 * addr)
821 {
822 struct myri10ge_cmd cmd;
823 int status;
824
825 cmd.data0 = ((addr[0] << 24) | (addr[1] << 16)
826 | (addr[2] << 8) | addr[3]);
827
828 cmd.data1 = ((addr[4] << 8) | (addr[5]));
829
830 status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0);
831 return status;
832 }
833
834 static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause)
835 {
836 struct myri10ge_cmd cmd;
837 int status, ctl;
838
839 ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL;
840 status = myri10ge_send_cmd(mgp, ctl, &cmd, 0);
841
842 if (status) {
843 netdev_err(mgp->dev, "Failed to set flow control mode\n");
844 return status;
845 }
846 mgp->pause = pause;
847 return 0;
848 }
849
850 static void
851 myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic)
852 {
853 struct myri10ge_cmd cmd;
854 int status, ctl;
855
856 ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC;
857 status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic);
858 if (status)
859 netdev_err(mgp->dev, "Failed to set promisc mode\n");
860 }
861
862 static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type)
863 {
864 struct myri10ge_cmd cmd;
865 int status;
866 u32 len;
867 struct page *dmatest_page;
868 dma_addr_t dmatest_bus;
869 char *test = " ";
870
871 dmatest_page = alloc_page(GFP_KERNEL);
872 if (!dmatest_page)
873 return -ENOMEM;
874 dmatest_bus = pci_map_page(mgp->pdev, dmatest_page, 0, PAGE_SIZE,
875 DMA_BIDIRECTIONAL);
876 if (unlikely(pci_dma_mapping_error(mgp->pdev, dmatest_bus))) {
877 __free_page(dmatest_page);
878 return -ENOMEM;
879 }
880
881 /* Run a small DMA test.
882 * The magic multipliers to the length tell the firmware
883 * to do DMA read, write, or read+write tests. The
884 * results are returned in cmd.data0. The upper 16
885 * bits or the return is the number of transfers completed.
886 * The lower 16 bits is the time in 0.5us ticks that the
887 * transfers took to complete.
888 */
889
890 len = mgp->tx_boundary;
891
892 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
893 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
894 cmd.data2 = len * 0x10000;
895 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
896 if (status != 0) {
897 test = "read";
898 goto abort;
899 }
900 mgp->read_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
901 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
902 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
903 cmd.data2 = len * 0x1;
904 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
905 if (status != 0) {
906 test = "write";
907 goto abort;
908 }
909 mgp->write_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
910
911 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
912 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
913 cmd.data2 = len * 0x10001;
914 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
915 if (status != 0) {
916 test = "read/write";
917 goto abort;
918 }
919 mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) /
920 (cmd.data0 & 0xffff);
921
922 abort:
923 pci_unmap_page(mgp->pdev, dmatest_bus, PAGE_SIZE, DMA_BIDIRECTIONAL);
924 put_page(dmatest_page);
925
926 if (status != 0 && test_type != MXGEFW_CMD_UNALIGNED_TEST)
927 dev_warn(&mgp->pdev->dev, "DMA %s benchmark failed: %d\n",
928 test, status);
929
930 return status;
931 }
932
933 #ifdef CONFIG_NET_RX_BUSY_POLL
934 static inline void myri10ge_ss_init_lock(struct myri10ge_slice_state *ss)
935 {
936 spin_lock_init(&ss->lock);
937 ss->state = SLICE_STATE_IDLE;
938 }
939
940 static inline bool myri10ge_ss_lock_napi(struct myri10ge_slice_state *ss)
941 {
942 bool rc = true;
943 spin_lock(&ss->lock);
944 if ((ss->state & SLICE_LOCKED)) {
945 WARN_ON((ss->state & SLICE_STATE_NAPI));
946 ss->state |= SLICE_STATE_NAPI_YIELD;
947 rc = false;
948 ss->lock_napi_yield++;
949 } else
950 ss->state = SLICE_STATE_NAPI;
951 spin_unlock(&ss->lock);
952 return rc;
953 }
954
955 static inline void myri10ge_ss_unlock_napi(struct myri10ge_slice_state *ss)
956 {
957 spin_lock(&ss->lock);
958 WARN_ON((ss->state & (SLICE_STATE_POLL | SLICE_STATE_NAPI_YIELD)));
959 ss->state = SLICE_STATE_IDLE;
960 spin_unlock(&ss->lock);
961 }
962
963 static inline bool myri10ge_ss_lock_poll(struct myri10ge_slice_state *ss)
964 {
965 bool rc = true;
966 spin_lock_bh(&ss->lock);
967 if ((ss->state & SLICE_LOCKED)) {
968 ss->state |= SLICE_STATE_POLL_YIELD;
969 rc = false;
970 ss->lock_poll_yield++;
971 } else
972 ss->state |= SLICE_STATE_POLL;
973 spin_unlock_bh(&ss->lock);
974 return rc;
975 }
976
977 static inline void myri10ge_ss_unlock_poll(struct myri10ge_slice_state *ss)
978 {
979 spin_lock_bh(&ss->lock);
980 WARN_ON((ss->state & SLICE_STATE_NAPI));
981 ss->state = SLICE_STATE_IDLE;
982 spin_unlock_bh(&ss->lock);
983 }
984
985 static inline bool myri10ge_ss_busy_polling(struct myri10ge_slice_state *ss)
986 {
987 WARN_ON(!(ss->state & SLICE_LOCKED));
988 return (ss->state & SLICE_USER_PEND);
989 }
990 #else /* CONFIG_NET_RX_BUSY_POLL */
991 static inline void myri10ge_ss_init_lock(struct myri10ge_slice_state *ss)
992 {
993 }
994
995 static inline bool myri10ge_ss_lock_napi(struct myri10ge_slice_state *ss)
996 {
997 return false;
998 }
999
1000 static inline void myri10ge_ss_unlock_napi(struct myri10ge_slice_state *ss)
1001 {
1002 }
1003
1004 static inline bool myri10ge_ss_lock_poll(struct myri10ge_slice_state *ss)
1005 {
1006 return false;
1007 }
1008
1009 static inline void myri10ge_ss_unlock_poll(struct myri10ge_slice_state *ss)
1010 {
1011 }
1012
1013 static inline bool myri10ge_ss_busy_polling(struct myri10ge_slice_state *ss)
1014 {
1015 return false;
1016 }
1017 #endif
1018
1019 static int myri10ge_reset(struct myri10ge_priv *mgp)
1020 {
1021 struct myri10ge_cmd cmd;
1022 struct myri10ge_slice_state *ss;
1023 int i, status;
1024 size_t bytes;
1025 #ifdef CONFIG_MYRI10GE_DCA
1026 unsigned long dca_tag_off;
1027 #endif
1028
1029 /* try to send a reset command to the card to see if it
1030 * is alive */
1031 memset(&cmd, 0, sizeof(cmd));
1032 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
1033 if (status != 0) {
1034 dev_err(&mgp->pdev->dev, "failed reset\n");
1035 return -ENXIO;
1036 }
1037
1038 (void)myri10ge_dma_test(mgp, MXGEFW_DMA_TEST);
1039 /*
1040 * Use non-ndis mcp_slot (eg, 4 bytes total,
1041 * no toeplitz hash value returned. Older firmware will
1042 * not understand this command, but will use the correct
1043 * sized mcp_slot, so we ignore error returns
1044 */
1045 cmd.data0 = MXGEFW_RSS_MCP_SLOT_TYPE_MIN;
1046 (void)myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_MCP_SLOT_TYPE, &cmd, 0);
1047
1048 /* Now exchange information about interrupts */
1049
1050 bytes = mgp->max_intr_slots * sizeof(*mgp->ss[0].rx_done.entry);
1051 cmd.data0 = (u32) bytes;
1052 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
1053
1054 /*
1055 * Even though we already know how many slices are supported
1056 * via myri10ge_probe_slices() MXGEFW_CMD_GET_MAX_RSS_QUEUES
1057 * has magic side effects, and must be called after a reset.
1058 * It must be called prior to calling any RSS related cmds,
1059 * including assigning an interrupt queue for anything but
1060 * slice 0. It must also be called *after*
1061 * MXGEFW_CMD_SET_INTRQ_SIZE, since the intrq size is used by
1062 * the firmware to compute offsets.
1063 */
1064
1065 if (mgp->num_slices > 1) {
1066
1067 /* ask the maximum number of slices it supports */
1068 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES,
1069 &cmd, 0);
1070 if (status != 0) {
1071 dev_err(&mgp->pdev->dev,
1072 "failed to get number of slices\n");
1073 }
1074
1075 /*
1076 * MXGEFW_CMD_ENABLE_RSS_QUEUES must be called prior
1077 * to setting up the interrupt queue DMA
1078 */
1079
1080 cmd.data0 = mgp->num_slices;
1081 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
1082 if (mgp->dev->real_num_tx_queues > 1)
1083 cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
1084 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
1085 &cmd, 0);
1086
1087 /* Firmware older than 1.4.32 only supports multiple
1088 * RX queues, so if we get an error, first retry using a
1089 * single TX queue before giving up */
1090 if (status != 0 && mgp->dev->real_num_tx_queues > 1) {
1091 netif_set_real_num_tx_queues(mgp->dev, 1);
1092 cmd.data0 = mgp->num_slices;
1093 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
1094 status = myri10ge_send_cmd(mgp,
1095 MXGEFW_CMD_ENABLE_RSS_QUEUES,
1096 &cmd, 0);
1097 }
1098
1099 if (status != 0) {
1100 dev_err(&mgp->pdev->dev,
1101 "failed to set number of slices\n");
1102
1103 return status;
1104 }
1105 }
1106 for (i = 0; i < mgp->num_slices; i++) {
1107 ss = &mgp->ss[i];
1108 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->rx_done.bus);
1109 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->rx_done.bus);
1110 cmd.data2 = i;
1111 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA,
1112 &cmd, 0);
1113 }
1114
1115 status |=
1116 myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0);
1117 for (i = 0; i < mgp->num_slices; i++) {
1118 ss = &mgp->ss[i];
1119 ss->irq_claim =
1120 (__iomem __be32 *) (mgp->sram + cmd.data0 + 8 * i);
1121 }
1122 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET,
1123 &cmd, 0);
1124 mgp->irq_deassert = (__iomem __be32 *) (mgp->sram + cmd.data0);
1125
1126 status |= myri10ge_send_cmd
1127 (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0);
1128 mgp->intr_coal_delay_ptr = (__iomem __be32 *) (mgp->sram + cmd.data0);
1129 if (status != 0) {
1130 dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n");
1131 return status;
1132 }
1133 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1134
1135 #ifdef CONFIG_MYRI10GE_DCA
1136 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_DCA_OFFSET, &cmd, 0);
1137 dca_tag_off = cmd.data0;
1138 for (i = 0; i < mgp->num_slices; i++) {
1139 ss = &mgp->ss[i];
1140 if (status == 0) {
1141 ss->dca_tag = (__iomem __be32 *)
1142 (mgp->sram + dca_tag_off + 4 * i);
1143 } else {
1144 ss->dca_tag = NULL;
1145 }
1146 }
1147 #endif /* CONFIG_MYRI10GE_DCA */
1148
1149 /* reset mcp/driver shared state back to 0 */
1150
1151 mgp->link_changes = 0;
1152 for (i = 0; i < mgp->num_slices; i++) {
1153 ss = &mgp->ss[i];
1154
1155 memset(ss->rx_done.entry, 0, bytes);
1156 ss->tx.req = 0;
1157 ss->tx.done = 0;
1158 ss->tx.pkt_start = 0;
1159 ss->tx.pkt_done = 0;
1160 ss->rx_big.cnt = 0;
1161 ss->rx_small.cnt = 0;
1162 ss->rx_done.idx = 0;
1163 ss->rx_done.cnt = 0;
1164 ss->tx.wake_queue = 0;
1165 ss->tx.stop_queue = 0;
1166 }
1167
1168 status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr);
1169 myri10ge_change_pause(mgp, mgp->pause);
1170 myri10ge_set_multicast_list(mgp->dev);
1171 return status;
1172 }
1173
1174 #ifdef CONFIG_MYRI10GE_DCA
1175 static int myri10ge_toggle_relaxed(struct pci_dev *pdev, int on)
1176 {
1177 int ret;
1178 u16 ctl;
1179
1180 pcie_capability_read_word(pdev, PCI_EXP_DEVCTL, &ctl);
1181
1182 ret = (ctl & PCI_EXP_DEVCTL_RELAX_EN) >> 4;
1183 if (ret != on) {
1184 ctl &= ~PCI_EXP_DEVCTL_RELAX_EN;
1185 ctl |= (on << 4);
1186 pcie_capability_write_word(pdev, PCI_EXP_DEVCTL, ctl);
1187 }
1188 return ret;
1189 }
1190
1191 static void
1192 myri10ge_write_dca(struct myri10ge_slice_state *ss, int cpu, int tag)
1193 {
1194 ss->cached_dca_tag = tag;
1195 put_be32(htonl(tag), ss->dca_tag);
1196 }
1197
1198 static inline void myri10ge_update_dca(struct myri10ge_slice_state *ss)
1199 {
1200 int cpu = get_cpu();
1201 int tag;
1202
1203 if (cpu != ss->cpu) {
1204 tag = dca3_get_tag(&ss->mgp->pdev->dev, cpu);
1205 if (ss->cached_dca_tag != tag)
1206 myri10ge_write_dca(ss, cpu, tag);
1207 ss->cpu = cpu;
1208 }
1209 put_cpu();
1210 }
1211
1212 static void myri10ge_setup_dca(struct myri10ge_priv *mgp)
1213 {
1214 int err, i;
1215 struct pci_dev *pdev = mgp->pdev;
1216
1217 if (mgp->ss[0].dca_tag == NULL || mgp->dca_enabled)
1218 return;
1219 if (!myri10ge_dca) {
1220 dev_err(&pdev->dev, "dca disabled by administrator\n");
1221 return;
1222 }
1223 err = dca_add_requester(&pdev->dev);
1224 if (err) {
1225 if (err != -ENODEV)
1226 dev_err(&pdev->dev,
1227 "dca_add_requester() failed, err=%d\n", err);
1228 return;
1229 }
1230 mgp->relaxed_order = myri10ge_toggle_relaxed(pdev, 0);
1231 mgp->dca_enabled = 1;
1232 for (i = 0; i < mgp->num_slices; i++) {
1233 mgp->ss[i].cpu = -1;
1234 mgp->ss[i].cached_dca_tag = -1;
1235 myri10ge_update_dca(&mgp->ss[i]);
1236 }
1237 }
1238
1239 static void myri10ge_teardown_dca(struct myri10ge_priv *mgp)
1240 {
1241 struct pci_dev *pdev = mgp->pdev;
1242
1243 if (!mgp->dca_enabled)
1244 return;
1245 mgp->dca_enabled = 0;
1246 if (mgp->relaxed_order)
1247 myri10ge_toggle_relaxed(pdev, 1);
1248 dca_remove_requester(&pdev->dev);
1249 }
1250
1251 static int myri10ge_notify_dca_device(struct device *dev, void *data)
1252 {
1253 struct myri10ge_priv *mgp;
1254 unsigned long event;
1255
1256 mgp = dev_get_drvdata(dev);
1257 event = *(unsigned long *)data;
1258
1259 if (event == DCA_PROVIDER_ADD)
1260 myri10ge_setup_dca(mgp);
1261 else if (event == DCA_PROVIDER_REMOVE)
1262 myri10ge_teardown_dca(mgp);
1263 return 0;
1264 }
1265 #endif /* CONFIG_MYRI10GE_DCA */
1266
1267 static inline void
1268 myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst,
1269 struct mcp_kreq_ether_recv *src)
1270 {
1271 __be32 low;
1272
1273 low = src->addr_low;
1274 src->addr_low = htonl(DMA_BIT_MASK(32));
1275 myri10ge_pio_copy(dst, src, 4 * sizeof(*src));
1276 mb();
1277 myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src));
1278 mb();
1279 src->addr_low = low;
1280 put_be32(low, &dst->addr_low);
1281 mb();
1282 }
1283
1284 static inline void myri10ge_vlan_ip_csum(struct sk_buff *skb, __wsum hw_csum)
1285 {
1286 struct vlan_hdr *vh = (struct vlan_hdr *)(skb->data);
1287
1288 if ((skb->protocol == htons(ETH_P_8021Q)) &&
1289 (vh->h_vlan_encapsulated_proto == htons(ETH_P_IP) ||
1290 vh->h_vlan_encapsulated_proto == htons(ETH_P_IPV6))) {
1291 skb->csum = hw_csum;
1292 skb->ip_summed = CHECKSUM_COMPLETE;
1293 }
1294 }
1295
1296 static void
1297 myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
1298 int bytes, int watchdog)
1299 {
1300 struct page *page;
1301 dma_addr_t bus;
1302 int idx;
1303 #if MYRI10GE_ALLOC_SIZE > 4096
1304 int end_offset;
1305 #endif
1306
1307 if (unlikely(rx->watchdog_needed && !watchdog))
1308 return;
1309
1310 /* try to refill entire ring */
1311 while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) {
1312 idx = rx->fill_cnt & rx->mask;
1313 if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) {
1314 /* we can use part of previous page */
1315 get_page(rx->page);
1316 } else {
1317 /* we need a new page */
1318 page =
1319 alloc_pages(GFP_ATOMIC | __GFP_COMP,
1320 MYRI10GE_ALLOC_ORDER);
1321 if (unlikely(page == NULL)) {
1322 if (rx->fill_cnt - rx->cnt < 16)
1323 rx->watchdog_needed = 1;
1324 return;
1325 }
1326
1327 bus = pci_map_page(mgp->pdev, page, 0,
1328 MYRI10GE_ALLOC_SIZE,
1329 PCI_DMA_FROMDEVICE);
1330 if (unlikely(pci_dma_mapping_error(mgp->pdev, bus))) {
1331 __free_pages(page, MYRI10GE_ALLOC_ORDER);
1332 if (rx->fill_cnt - rx->cnt < 16)
1333 rx->watchdog_needed = 1;
1334 return;
1335 }
1336
1337 rx->page = page;
1338 rx->page_offset = 0;
1339 rx->bus = bus;
1340
1341 }
1342 rx->info[idx].page = rx->page;
1343 rx->info[idx].page_offset = rx->page_offset;
1344 /* note that this is the address of the start of the
1345 * page */
1346 dma_unmap_addr_set(&rx->info[idx], bus, rx->bus);
1347 rx->shadow[idx].addr_low =
1348 htonl(MYRI10GE_LOWPART_TO_U32(rx->bus) + rx->page_offset);
1349 rx->shadow[idx].addr_high =
1350 htonl(MYRI10GE_HIGHPART_TO_U32(rx->bus));
1351
1352 /* start next packet on a cacheline boundary */
1353 rx->page_offset += SKB_DATA_ALIGN(bytes);
1354
1355 #if MYRI10GE_ALLOC_SIZE > 4096
1356 /* don't cross a 4KB boundary */
1357 end_offset = rx->page_offset + bytes - 1;
1358 if ((unsigned)(rx->page_offset ^ end_offset) > 4095)
1359 rx->page_offset = end_offset & ~4095;
1360 #endif
1361 rx->fill_cnt++;
1362
1363 /* copy 8 descriptors to the firmware at a time */
1364 if ((idx & 7) == 7) {
1365 myri10ge_submit_8rx(&rx->lanai[idx - 7],
1366 &rx->shadow[idx - 7]);
1367 }
1368 }
1369 }
1370
1371 static inline void
1372 myri10ge_unmap_rx_page(struct pci_dev *pdev,
1373 struct myri10ge_rx_buffer_state *info, int bytes)
1374 {
1375 /* unmap the recvd page if we're the only or last user of it */
1376 if (bytes >= MYRI10GE_ALLOC_SIZE / 2 ||
1377 (info->page_offset + 2 * bytes) > MYRI10GE_ALLOC_SIZE) {
1378 pci_unmap_page(pdev, (dma_unmap_addr(info, bus)
1379 & ~(MYRI10GE_ALLOC_SIZE - 1)),
1380 MYRI10GE_ALLOC_SIZE, PCI_DMA_FROMDEVICE);
1381 }
1382 }
1383
1384 /*
1385 * GRO does not support acceleration of tagged vlan frames, and
1386 * this NIC does not support vlan tag offload, so we must pop
1387 * the tag ourselves to be able to achieve GRO performance that
1388 * is comparable to LRO.
1389 */
1390
1391 static inline void
1392 myri10ge_vlan_rx(struct net_device *dev, void *addr, struct sk_buff *skb)
1393 {
1394 u8 *va;
1395 struct vlan_ethhdr *veh;
1396 struct skb_frag_struct *frag;
1397 __wsum vsum;
1398
1399 va = addr;
1400 va += MXGEFW_PAD;
1401 veh = (struct vlan_ethhdr *)va;
1402 if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) ==
1403 NETIF_F_HW_VLAN_CTAG_RX &&
1404 veh->h_vlan_proto == htons(ETH_P_8021Q)) {
1405 /* fixup csum if needed */
1406 if (skb->ip_summed == CHECKSUM_COMPLETE) {
1407 vsum = csum_partial(va + ETH_HLEN, VLAN_HLEN, 0);
1408 skb->csum = csum_sub(skb->csum, vsum);
1409 }
1410 /* pop tag */
1411 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ntohs(veh->h_vlan_TCI));
1412 memmove(va + VLAN_HLEN, va, 2 * ETH_ALEN);
1413 skb->len -= VLAN_HLEN;
1414 skb->data_len -= VLAN_HLEN;
1415 frag = skb_shinfo(skb)->frags;
1416 frag->page_offset += VLAN_HLEN;
1417 skb_frag_size_set(frag, skb_frag_size(frag) - VLAN_HLEN);
1418 }
1419 }
1420
1421 #define MYRI10GE_HLEN 64 /* Bytes to copy from page to skb linear memory */
1422
1423 static inline int
1424 myri10ge_rx_done(struct myri10ge_slice_state *ss, int len, __wsum csum)
1425 {
1426 struct myri10ge_priv *mgp = ss->mgp;
1427 struct sk_buff *skb;
1428 struct skb_frag_struct *rx_frags;
1429 struct myri10ge_rx_buf *rx;
1430 int i, idx, remainder, bytes;
1431 struct pci_dev *pdev = mgp->pdev;
1432 struct net_device *dev = mgp->dev;
1433 u8 *va;
1434 bool polling;
1435
1436 if (len <= mgp->small_bytes) {
1437 rx = &ss->rx_small;
1438 bytes = mgp->small_bytes;
1439 } else {
1440 rx = &ss->rx_big;
1441 bytes = mgp->big_bytes;
1442 }
1443
1444 len += MXGEFW_PAD;
1445 idx = rx->cnt & rx->mask;
1446 va = page_address(rx->info[idx].page) + rx->info[idx].page_offset;
1447 prefetch(va);
1448
1449 /* When busy polling in user context, allocate skb and copy headers to
1450 * skb's linear memory ourselves. When not busy polling, use the napi
1451 * gro api.
1452 */
1453 polling = myri10ge_ss_busy_polling(ss);
1454 if (polling)
1455 skb = netdev_alloc_skb(dev, MYRI10GE_HLEN + 16);
1456 else
1457 skb = napi_get_frags(&ss->napi);
1458 if (unlikely(skb == NULL)) {
1459 ss->stats.rx_dropped++;
1460 for (i = 0, remainder = len; remainder > 0; i++) {
1461 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1462 put_page(rx->info[idx].page);
1463 rx->cnt++;
1464 idx = rx->cnt & rx->mask;
1465 remainder -= MYRI10GE_ALLOC_SIZE;
1466 }
1467 return 0;
1468 }
1469 rx_frags = skb_shinfo(skb)->frags;
1470 /* Fill skb_frag_struct(s) with data from our receive */
1471 for (i = 0, remainder = len; remainder > 0; i++) {
1472 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1473 skb_fill_page_desc(skb, i, rx->info[idx].page,
1474 rx->info[idx].page_offset,
1475 remainder < MYRI10GE_ALLOC_SIZE ?
1476 remainder : MYRI10GE_ALLOC_SIZE);
1477 rx->cnt++;
1478 idx = rx->cnt & rx->mask;
1479 remainder -= MYRI10GE_ALLOC_SIZE;
1480 }
1481
1482 /* remove padding */
1483 rx_frags[0].page_offset += MXGEFW_PAD;
1484 rx_frags[0].size -= MXGEFW_PAD;
1485 len -= MXGEFW_PAD;
1486
1487 skb->len = len;
1488 skb->data_len = len;
1489 skb->truesize += len;
1490 if (dev->features & NETIF_F_RXCSUM) {
1491 skb->ip_summed = CHECKSUM_COMPLETE;
1492 skb->csum = csum;
1493 }
1494 myri10ge_vlan_rx(mgp->dev, va, skb);
1495 skb_record_rx_queue(skb, ss - &mgp->ss[0]);
1496 skb_mark_napi_id(skb, &ss->napi);
1497
1498 if (polling) {
1499 int hlen;
1500
1501 /* myri10ge_vlan_rx might have moved the header, so compute
1502 * length and address again.
1503 */
1504 hlen = MYRI10GE_HLEN > skb->len ? skb->len : MYRI10GE_HLEN;
1505 va = page_address(skb_frag_page(&rx_frags[0])) +
1506 rx_frags[0].page_offset;
1507 /* Copy header into the skb linear memory */
1508 skb_copy_to_linear_data(skb, va, hlen);
1509 rx_frags[0].page_offset += hlen;
1510 rx_frags[0].size -= hlen;
1511 skb->data_len -= hlen;
1512 skb->tail += hlen;
1513 skb->protocol = eth_type_trans(skb, dev);
1514 netif_receive_skb(skb);
1515 }
1516 else
1517 napi_gro_frags(&ss->napi);
1518
1519 return 1;
1520 }
1521
1522 static inline void
1523 myri10ge_tx_done(struct myri10ge_slice_state *ss, int mcp_index)
1524 {
1525 struct pci_dev *pdev = ss->mgp->pdev;
1526 struct myri10ge_tx_buf *tx = &ss->tx;
1527 struct netdev_queue *dev_queue;
1528 struct sk_buff *skb;
1529 int idx, len;
1530
1531 while (tx->pkt_done != mcp_index) {
1532 idx = tx->done & tx->mask;
1533 skb = tx->info[idx].skb;
1534
1535 /* Mark as free */
1536 tx->info[idx].skb = NULL;
1537 if (tx->info[idx].last) {
1538 tx->pkt_done++;
1539 tx->info[idx].last = 0;
1540 }
1541 tx->done++;
1542 len = dma_unmap_len(&tx->info[idx], len);
1543 dma_unmap_len_set(&tx->info[idx], len, 0);
1544 if (skb) {
1545 ss->stats.tx_bytes += skb->len;
1546 ss->stats.tx_packets++;
1547 dev_kfree_skb_irq(skb);
1548 if (len)
1549 pci_unmap_single(pdev,
1550 dma_unmap_addr(&tx->info[idx],
1551 bus), len,
1552 PCI_DMA_TODEVICE);
1553 } else {
1554 if (len)
1555 pci_unmap_page(pdev,
1556 dma_unmap_addr(&tx->info[idx],
1557 bus), len,
1558 PCI_DMA_TODEVICE);
1559 }
1560 }
1561
1562 dev_queue = netdev_get_tx_queue(ss->dev, ss - ss->mgp->ss);
1563 /*
1564 * Make a minimal effort to prevent the NIC from polling an
1565 * idle tx queue. If we can't get the lock we leave the queue
1566 * active. In this case, either a thread was about to start
1567 * using the queue anyway, or we lost a race and the NIC will
1568 * waste some of its resources polling an inactive queue for a
1569 * while.
1570 */
1571
1572 if ((ss->mgp->dev->real_num_tx_queues > 1) &&
1573 __netif_tx_trylock(dev_queue)) {
1574 if (tx->req == tx->done) {
1575 tx->queue_active = 0;
1576 put_be32(htonl(1), tx->send_stop);
1577 mb();
1578 mmiowb();
1579 }
1580 __netif_tx_unlock(dev_queue);
1581 }
1582
1583 /* start the queue if we've stopped it */
1584 if (netif_tx_queue_stopped(dev_queue) &&
1585 tx->req - tx->done < (tx->mask >> 1) &&
1586 ss->mgp->running == MYRI10GE_ETH_RUNNING) {
1587 tx->wake_queue++;
1588 netif_tx_wake_queue(dev_queue);
1589 }
1590 }
1591
1592 static inline int
1593 myri10ge_clean_rx_done(struct myri10ge_slice_state *ss, int budget)
1594 {
1595 struct myri10ge_rx_done *rx_done = &ss->rx_done;
1596 struct myri10ge_priv *mgp = ss->mgp;
1597 unsigned long rx_bytes = 0;
1598 unsigned long rx_packets = 0;
1599 unsigned long rx_ok;
1600 int idx = rx_done->idx;
1601 int cnt = rx_done->cnt;
1602 int work_done = 0;
1603 u16 length;
1604 __wsum checksum;
1605
1606 while (rx_done->entry[idx].length != 0 && work_done < budget) {
1607 length = ntohs(rx_done->entry[idx].length);
1608 rx_done->entry[idx].length = 0;
1609 checksum = csum_unfold(rx_done->entry[idx].checksum);
1610 rx_ok = myri10ge_rx_done(ss, length, checksum);
1611 rx_packets += rx_ok;
1612 rx_bytes += rx_ok * (unsigned long)length;
1613 cnt++;
1614 idx = cnt & (mgp->max_intr_slots - 1);
1615 work_done++;
1616 }
1617 rx_done->idx = idx;
1618 rx_done->cnt = cnt;
1619 ss->stats.rx_packets += rx_packets;
1620 ss->stats.rx_bytes += rx_bytes;
1621
1622 /* restock receive rings if needed */
1623 if (ss->rx_small.fill_cnt - ss->rx_small.cnt < myri10ge_fill_thresh)
1624 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
1625 mgp->small_bytes + MXGEFW_PAD, 0);
1626 if (ss->rx_big.fill_cnt - ss->rx_big.cnt < myri10ge_fill_thresh)
1627 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
1628
1629 return work_done;
1630 }
1631
1632 static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
1633 {
1634 struct mcp_irq_data *stats = mgp->ss[0].fw_stats;
1635
1636 if (unlikely(stats->stats_updated)) {
1637 unsigned link_up = ntohl(stats->link_up);
1638 if (mgp->link_state != link_up) {
1639 mgp->link_state = link_up;
1640
1641 if (mgp->link_state == MXGEFW_LINK_UP) {
1642 netif_info(mgp, link, mgp->dev, "link up\n");
1643 netif_carrier_on(mgp->dev);
1644 mgp->link_changes++;
1645 } else {
1646 netif_info(mgp, link, mgp->dev, "link %s\n",
1647 (link_up == MXGEFW_LINK_MYRINET ?
1648 "mismatch (Myrinet detected)" :
1649 "down"));
1650 netif_carrier_off(mgp->dev);
1651 mgp->link_changes++;
1652 }
1653 }
1654 if (mgp->rdma_tags_available !=
1655 ntohl(stats->rdma_tags_available)) {
1656 mgp->rdma_tags_available =
1657 ntohl(stats->rdma_tags_available);
1658 netdev_warn(mgp->dev, "RDMA timed out! %d tags left\n",
1659 mgp->rdma_tags_available);
1660 }
1661 mgp->down_cnt += stats->link_down;
1662 if (stats->link_down)
1663 wake_up(&mgp->down_wq);
1664 }
1665 }
1666
1667 static int myri10ge_poll(struct napi_struct *napi, int budget)
1668 {
1669 struct myri10ge_slice_state *ss =
1670 container_of(napi, struct myri10ge_slice_state, napi);
1671 int work_done;
1672
1673 #ifdef CONFIG_MYRI10GE_DCA
1674 if (ss->mgp->dca_enabled)
1675 myri10ge_update_dca(ss);
1676 #endif
1677 /* Try later if the busy_poll handler is running. */
1678 if (!myri10ge_ss_lock_napi(ss))
1679 return budget;
1680
1681 /* process as many rx events as NAPI will allow */
1682 work_done = myri10ge_clean_rx_done(ss, budget);
1683
1684 myri10ge_ss_unlock_napi(ss);
1685 if (work_done < budget) {
1686 napi_complete(napi);
1687 put_be32(htonl(3), ss->irq_claim);
1688 }
1689 return work_done;
1690 }
1691
1692 #ifdef CONFIG_NET_RX_BUSY_POLL
1693 static int myri10ge_busy_poll(struct napi_struct *napi)
1694 {
1695 struct myri10ge_slice_state *ss =
1696 container_of(napi, struct myri10ge_slice_state, napi);
1697 struct myri10ge_priv *mgp = ss->mgp;
1698 int work_done;
1699
1700 /* Poll only when the link is up */
1701 if (mgp->link_state != MXGEFW_LINK_UP)
1702 return LL_FLUSH_FAILED;
1703
1704 if (!myri10ge_ss_lock_poll(ss))
1705 return LL_FLUSH_BUSY;
1706
1707 /* Process a small number of packets */
1708 work_done = myri10ge_clean_rx_done(ss, 4);
1709 if (work_done)
1710 ss->busy_poll_cnt += work_done;
1711 else
1712 ss->busy_poll_miss++;
1713
1714 myri10ge_ss_unlock_poll(ss);
1715
1716 return work_done;
1717 }
1718 #endif /* CONFIG_NET_RX_BUSY_POLL */
1719
1720 static irqreturn_t myri10ge_intr(int irq, void *arg)
1721 {
1722 struct myri10ge_slice_state *ss = arg;
1723 struct myri10ge_priv *mgp = ss->mgp;
1724 struct mcp_irq_data *stats = ss->fw_stats;
1725 struct myri10ge_tx_buf *tx = &ss->tx;
1726 u32 send_done_count;
1727 int i;
1728
1729 /* an interrupt on a non-zero receive-only slice is implicitly
1730 * valid since MSI-X irqs are not shared */
1731 if ((mgp->dev->real_num_tx_queues == 1) && (ss != mgp->ss)) {
1732 napi_schedule(&ss->napi);
1733 return IRQ_HANDLED;
1734 }
1735
1736 /* make sure it is our IRQ, and that the DMA has finished */
1737 if (unlikely(!stats->valid))
1738 return IRQ_NONE;
1739
1740 /* low bit indicates receives are present, so schedule
1741 * napi poll handler */
1742 if (stats->valid & 1)
1743 napi_schedule(&ss->napi);
1744
1745 if (!mgp->msi_enabled && !mgp->msix_enabled) {
1746 put_be32(0, mgp->irq_deassert);
1747 if (!myri10ge_deassert_wait)
1748 stats->valid = 0;
1749 mb();
1750 } else
1751 stats->valid = 0;
1752
1753 /* Wait for IRQ line to go low, if using INTx */
1754 i = 0;
1755 while (1) {
1756 i++;
1757 /* check for transmit completes and receives */
1758 send_done_count = ntohl(stats->send_done_count);
1759 if (send_done_count != tx->pkt_done)
1760 myri10ge_tx_done(ss, (int)send_done_count);
1761 if (unlikely(i > myri10ge_max_irq_loops)) {
1762 netdev_warn(mgp->dev, "irq stuck?\n");
1763 stats->valid = 0;
1764 schedule_work(&mgp->watchdog_work);
1765 }
1766 if (likely(stats->valid == 0))
1767 break;
1768 cpu_relax();
1769 barrier();
1770 }
1771
1772 /* Only slice 0 updates stats */
1773 if (ss == mgp->ss)
1774 myri10ge_check_statblock(mgp);
1775
1776 put_be32(htonl(3), ss->irq_claim + 1);
1777 return IRQ_HANDLED;
1778 }
1779
1780 static int
1781 myri10ge_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
1782 {
1783 struct myri10ge_priv *mgp = netdev_priv(netdev);
1784 char *ptr;
1785 int i;
1786
1787 cmd->autoneg = AUTONEG_DISABLE;
1788 ethtool_cmd_speed_set(cmd, SPEED_10000);
1789 cmd->duplex = DUPLEX_FULL;
1790
1791 /*
1792 * parse the product code to deterimine the interface type
1793 * (CX4, XFP, Quad Ribbon Fiber) by looking at the character
1794 * after the 3rd dash in the driver's cached copy of the
1795 * EEPROM's product code string.
1796 */
1797 ptr = mgp->product_code_string;
1798 if (ptr == NULL) {
1799 netdev_err(netdev, "Missing product code\n");
1800 return 0;
1801 }
1802 for (i = 0; i < 3; i++, ptr++) {
1803 ptr = strchr(ptr, '-');
1804 if (ptr == NULL) {
1805 netdev_err(netdev, "Invalid product code %s\n",
1806 mgp->product_code_string);
1807 return 0;
1808 }
1809 }
1810 if (*ptr == '2')
1811 ptr++;
1812 if (*ptr == 'R' || *ptr == 'Q' || *ptr == 'S') {
1813 /* We've found either an XFP, quad ribbon fiber, or SFP+ */
1814 cmd->port = PORT_FIBRE;
1815 cmd->supported |= SUPPORTED_FIBRE;
1816 cmd->advertising |= ADVERTISED_FIBRE;
1817 } else {
1818 cmd->port = PORT_OTHER;
1819 }
1820 if (*ptr == 'R' || *ptr == 'S')
1821 cmd->transceiver = XCVR_EXTERNAL;
1822 else
1823 cmd->transceiver = XCVR_INTERNAL;
1824
1825 return 0;
1826 }
1827
1828 static void
1829 myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
1830 {
1831 struct myri10ge_priv *mgp = netdev_priv(netdev);
1832
1833 strlcpy(info->driver, "myri10ge", sizeof(info->driver));
1834 strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version));
1835 strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version));
1836 strlcpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info));
1837 }
1838
1839 static int
1840 myri10ge_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1841 {
1842 struct myri10ge_priv *mgp = netdev_priv(netdev);
1843
1844 coal->rx_coalesce_usecs = mgp->intr_coal_delay;
1845 return 0;
1846 }
1847
1848 static int
1849 myri10ge_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1850 {
1851 struct myri10ge_priv *mgp = netdev_priv(netdev);
1852
1853 mgp->intr_coal_delay = coal->rx_coalesce_usecs;
1854 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1855 return 0;
1856 }
1857
1858 static void
1859 myri10ge_get_pauseparam(struct net_device *netdev,
1860 struct ethtool_pauseparam *pause)
1861 {
1862 struct myri10ge_priv *mgp = netdev_priv(netdev);
1863
1864 pause->autoneg = 0;
1865 pause->rx_pause = mgp->pause;
1866 pause->tx_pause = mgp->pause;
1867 }
1868
1869 static int
1870 myri10ge_set_pauseparam(struct net_device *netdev,
1871 struct ethtool_pauseparam *pause)
1872 {
1873 struct myri10ge_priv *mgp = netdev_priv(netdev);
1874
1875 if (pause->tx_pause != mgp->pause)
1876 return myri10ge_change_pause(mgp, pause->tx_pause);
1877 if (pause->rx_pause != mgp->pause)
1878 return myri10ge_change_pause(mgp, pause->rx_pause);
1879 if (pause->autoneg != 0)
1880 return -EINVAL;
1881 return 0;
1882 }
1883
1884 static void
1885 myri10ge_get_ringparam(struct net_device *netdev,
1886 struct ethtool_ringparam *ring)
1887 {
1888 struct myri10ge_priv *mgp = netdev_priv(netdev);
1889
1890 ring->rx_mini_max_pending = mgp->ss[0].rx_small.mask + 1;
1891 ring->rx_max_pending = mgp->ss[0].rx_big.mask + 1;
1892 ring->rx_jumbo_max_pending = 0;
1893 ring->tx_max_pending = mgp->ss[0].tx.mask + 1;
1894 ring->rx_mini_pending = ring->rx_mini_max_pending;
1895 ring->rx_pending = ring->rx_max_pending;
1896 ring->rx_jumbo_pending = ring->rx_jumbo_max_pending;
1897 ring->tx_pending = ring->tx_max_pending;
1898 }
1899
1900 static const char myri10ge_gstrings_main_stats[][ETH_GSTRING_LEN] = {
1901 "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
1902 "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
1903 "rx_length_errors", "rx_over_errors", "rx_crc_errors",
1904 "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
1905 "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
1906 "tx_heartbeat_errors", "tx_window_errors",
1907 /* device-specific stats */
1908 "tx_boundary", "WC", "irq", "MSI", "MSIX",
1909 "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
1910 "serial_number", "watchdog_resets",
1911 #ifdef CONFIG_MYRI10GE_DCA
1912 "dca_capable_firmware", "dca_device_present",
1913 #endif
1914 "link_changes", "link_up", "dropped_link_overflow",
1915 "dropped_link_error_or_filtered",
1916 "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32",
1917 "dropped_unicast_filtered", "dropped_multicast_filtered",
1918 "dropped_runt", "dropped_overrun", "dropped_no_small_buffer",
1919 "dropped_no_big_buffer"
1920 };
1921
1922 static const char myri10ge_gstrings_slice_stats[][ETH_GSTRING_LEN] = {
1923 "----------- slice ---------",
1924 "tx_pkt_start", "tx_pkt_done", "tx_req", "tx_done",
1925 "rx_small_cnt", "rx_big_cnt",
1926 "wake_queue", "stop_queue", "tx_linearized",
1927 #ifdef CONFIG_NET_RX_BUSY_POLL
1928 "rx_lock_napi_yield", "rx_lock_poll_yield", "rx_busy_poll_miss",
1929 "rx_busy_poll_cnt",
1930 #endif
1931 };
1932
1933 #define MYRI10GE_NET_STATS_LEN 21
1934 #define MYRI10GE_MAIN_STATS_LEN ARRAY_SIZE(myri10ge_gstrings_main_stats)
1935 #define MYRI10GE_SLICE_STATS_LEN ARRAY_SIZE(myri10ge_gstrings_slice_stats)
1936
1937 static void
1938 myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
1939 {
1940 struct myri10ge_priv *mgp = netdev_priv(netdev);
1941 int i;
1942
1943 switch (stringset) {
1944 case ETH_SS_STATS:
1945 memcpy(data, *myri10ge_gstrings_main_stats,
1946 sizeof(myri10ge_gstrings_main_stats));
1947 data += sizeof(myri10ge_gstrings_main_stats);
1948 for (i = 0; i < mgp->num_slices; i++) {
1949 memcpy(data, *myri10ge_gstrings_slice_stats,
1950 sizeof(myri10ge_gstrings_slice_stats));
1951 data += sizeof(myri10ge_gstrings_slice_stats);
1952 }
1953 break;
1954 }
1955 }
1956
1957 static int myri10ge_get_sset_count(struct net_device *netdev, int sset)
1958 {
1959 struct myri10ge_priv *mgp = netdev_priv(netdev);
1960
1961 switch (sset) {
1962 case ETH_SS_STATS:
1963 return MYRI10GE_MAIN_STATS_LEN +
1964 mgp->num_slices * MYRI10GE_SLICE_STATS_LEN;
1965 default:
1966 return -EOPNOTSUPP;
1967 }
1968 }
1969
1970 static void
1971 myri10ge_get_ethtool_stats(struct net_device *netdev,
1972 struct ethtool_stats *stats, u64 * data)
1973 {
1974 struct myri10ge_priv *mgp = netdev_priv(netdev);
1975 struct myri10ge_slice_state *ss;
1976 struct rtnl_link_stats64 link_stats;
1977 int slice;
1978 int i;
1979
1980 /* force stats update */
1981 memset(&link_stats, 0, sizeof(link_stats));
1982 (void)myri10ge_get_stats(netdev, &link_stats);
1983 for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++)
1984 data[i] = ((u64 *)&link_stats)[i];
1985
1986 data[i++] = (unsigned int)mgp->tx_boundary;
1987 data[i++] = (unsigned int)mgp->wc_enabled;
1988 data[i++] = (unsigned int)mgp->pdev->irq;
1989 data[i++] = (unsigned int)mgp->msi_enabled;
1990 data[i++] = (unsigned int)mgp->msix_enabled;
1991 data[i++] = (unsigned int)mgp->read_dma;
1992 data[i++] = (unsigned int)mgp->write_dma;
1993 data[i++] = (unsigned int)mgp->read_write_dma;
1994 data[i++] = (unsigned int)mgp->serial_number;
1995 data[i++] = (unsigned int)mgp->watchdog_resets;
1996 #ifdef CONFIG_MYRI10GE_DCA
1997 data[i++] = (unsigned int)(mgp->ss[0].dca_tag != NULL);
1998 data[i++] = (unsigned int)(mgp->dca_enabled);
1999 #endif
2000 data[i++] = (unsigned int)mgp->link_changes;
2001
2002 /* firmware stats are useful only in the first slice */
2003 ss = &mgp->ss[0];
2004 data[i++] = (unsigned int)ntohl(ss->fw_stats->link_up);
2005 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_link_overflow);
2006 data[i++] =
2007 (unsigned int)ntohl(ss->fw_stats->dropped_link_error_or_filtered);
2008 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_pause);
2009 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_phy);
2010 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_crc32);
2011 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_unicast_filtered);
2012 data[i++] =
2013 (unsigned int)ntohl(ss->fw_stats->dropped_multicast_filtered);
2014 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_runt);
2015 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_overrun);
2016 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_small_buffer);
2017 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_big_buffer);
2018
2019 for (slice = 0; slice < mgp->num_slices; slice++) {
2020 ss = &mgp->ss[slice];
2021 data[i++] = slice;
2022 data[i++] = (unsigned int)ss->tx.pkt_start;
2023 data[i++] = (unsigned int)ss->tx.pkt_done;
2024 data[i++] = (unsigned int)ss->tx.req;
2025 data[i++] = (unsigned int)ss->tx.done;
2026 data[i++] = (unsigned int)ss->rx_small.cnt;
2027 data[i++] = (unsigned int)ss->rx_big.cnt;
2028 data[i++] = (unsigned int)ss->tx.wake_queue;
2029 data[i++] = (unsigned int)ss->tx.stop_queue;
2030 data[i++] = (unsigned int)ss->tx.linearized;
2031 #ifdef CONFIG_NET_RX_BUSY_POLL
2032 data[i++] = ss->lock_napi_yield;
2033 data[i++] = ss->lock_poll_yield;
2034 data[i++] = ss->busy_poll_miss;
2035 data[i++] = ss->busy_poll_cnt;
2036 #endif
2037 }
2038 }
2039
2040 static void myri10ge_set_msglevel(struct net_device *netdev, u32 value)
2041 {
2042 struct myri10ge_priv *mgp = netdev_priv(netdev);
2043 mgp->msg_enable = value;
2044 }
2045
2046 static u32 myri10ge_get_msglevel(struct net_device *netdev)
2047 {
2048 struct myri10ge_priv *mgp = netdev_priv(netdev);
2049 return mgp->msg_enable;
2050 }
2051
2052 /*
2053 * Use a low-level command to change the LED behavior. Rather than
2054 * blinking (which is the normal case), when identify is used, the
2055 * yellow LED turns solid.
2056 */
2057 static int myri10ge_led(struct myri10ge_priv *mgp, int on)
2058 {
2059 struct mcp_gen_header *hdr;
2060 struct device *dev = &mgp->pdev->dev;
2061 size_t hdr_off, pattern_off, hdr_len;
2062 u32 pattern = 0xfffffffe;
2063
2064 /* find running firmware header */
2065 hdr_off = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
2066 if ((hdr_off & 3) || hdr_off + sizeof(*hdr) > mgp->sram_size) {
2067 dev_err(dev, "Running firmware has bad header offset (%d)\n",
2068 (int)hdr_off);
2069 return -EIO;
2070 }
2071 hdr_len = swab32(readl(mgp->sram + hdr_off +
2072 offsetof(struct mcp_gen_header, header_length)));
2073 pattern_off = hdr_off + offsetof(struct mcp_gen_header, led_pattern);
2074 if (pattern_off >= (hdr_len + hdr_off)) {
2075 dev_info(dev, "Firmware does not support LED identification\n");
2076 return -EINVAL;
2077 }
2078 if (!on)
2079 pattern = swab32(readl(mgp->sram + pattern_off + 4));
2080 writel(swab32(pattern), mgp->sram + pattern_off);
2081 return 0;
2082 }
2083
2084 static int
2085 myri10ge_phys_id(struct net_device *netdev, enum ethtool_phys_id_state state)
2086 {
2087 struct myri10ge_priv *mgp = netdev_priv(netdev);
2088 int rc;
2089
2090 switch (state) {
2091 case ETHTOOL_ID_ACTIVE:
2092 rc = myri10ge_led(mgp, 1);
2093 break;
2094
2095 case ETHTOOL_ID_INACTIVE:
2096 rc = myri10ge_led(mgp, 0);
2097 break;
2098
2099 default:
2100 rc = -EINVAL;
2101 }
2102
2103 return rc;
2104 }
2105
2106 static const struct ethtool_ops myri10ge_ethtool_ops = {
2107 .get_settings = myri10ge_get_settings,
2108 .get_drvinfo = myri10ge_get_drvinfo,
2109 .get_coalesce = myri10ge_get_coalesce,
2110 .set_coalesce = myri10ge_set_coalesce,
2111 .get_pauseparam = myri10ge_get_pauseparam,
2112 .set_pauseparam = myri10ge_set_pauseparam,
2113 .get_ringparam = myri10ge_get_ringparam,
2114 .get_link = ethtool_op_get_link,
2115 .get_strings = myri10ge_get_strings,
2116 .get_sset_count = myri10ge_get_sset_count,
2117 .get_ethtool_stats = myri10ge_get_ethtool_stats,
2118 .set_msglevel = myri10ge_set_msglevel,
2119 .get_msglevel = myri10ge_get_msglevel,
2120 .set_phys_id = myri10ge_phys_id,
2121 };
2122
2123 static int myri10ge_allocate_rings(struct myri10ge_slice_state *ss)
2124 {
2125 struct myri10ge_priv *mgp = ss->mgp;
2126 struct myri10ge_cmd cmd;
2127 struct net_device *dev = mgp->dev;
2128 int tx_ring_size, rx_ring_size;
2129 int tx_ring_entries, rx_ring_entries;
2130 int i, slice, status;
2131 size_t bytes;
2132
2133 /* get ring sizes */
2134 slice = ss - mgp->ss;
2135 cmd.data0 = slice;
2136 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0);
2137 tx_ring_size = cmd.data0;
2138 cmd.data0 = slice;
2139 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
2140 if (status != 0)
2141 return status;
2142 rx_ring_size = cmd.data0;
2143
2144 tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send);
2145 rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr);
2146 ss->tx.mask = tx_ring_entries - 1;
2147 ss->rx_small.mask = ss->rx_big.mask = rx_ring_entries - 1;
2148
2149 status = -ENOMEM;
2150
2151 /* allocate the host shadow rings */
2152
2153 bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4)
2154 * sizeof(*ss->tx.req_list);
2155 ss->tx.req_bytes = kzalloc(bytes, GFP_KERNEL);
2156 if (ss->tx.req_bytes == NULL)
2157 goto abort_with_nothing;
2158
2159 /* ensure req_list entries are aligned to 8 bytes */
2160 ss->tx.req_list = (struct mcp_kreq_ether_send *)
2161 ALIGN((unsigned long)ss->tx.req_bytes, 8);
2162 ss->tx.queue_active = 0;
2163
2164 bytes = rx_ring_entries * sizeof(*ss->rx_small.shadow);
2165 ss->rx_small.shadow = kzalloc(bytes, GFP_KERNEL);
2166 if (ss->rx_small.shadow == NULL)
2167 goto abort_with_tx_req_bytes;
2168
2169 bytes = rx_ring_entries * sizeof(*ss->rx_big.shadow);
2170 ss->rx_big.shadow = kzalloc(bytes, GFP_KERNEL);
2171 if (ss->rx_big.shadow == NULL)
2172 goto abort_with_rx_small_shadow;
2173
2174 /* allocate the host info rings */
2175
2176 bytes = tx_ring_entries * sizeof(*ss->tx.info);
2177 ss->tx.info = kzalloc(bytes, GFP_KERNEL);
2178 if (ss->tx.info == NULL)
2179 goto abort_with_rx_big_shadow;
2180
2181 bytes = rx_ring_entries * sizeof(*ss->rx_small.info);
2182 ss->rx_small.info = kzalloc(bytes, GFP_KERNEL);
2183 if (ss->rx_small.info == NULL)
2184 goto abort_with_tx_info;
2185
2186 bytes = rx_ring_entries * sizeof(*ss->rx_big.info);
2187 ss->rx_big.info = kzalloc(bytes, GFP_KERNEL);
2188 if (ss->rx_big.info == NULL)
2189 goto abort_with_rx_small_info;
2190
2191 /* Fill the receive rings */
2192 ss->rx_big.cnt = 0;
2193 ss->rx_small.cnt = 0;
2194 ss->rx_big.fill_cnt = 0;
2195 ss->rx_small.fill_cnt = 0;
2196 ss->rx_small.page_offset = MYRI10GE_ALLOC_SIZE;
2197 ss->rx_big.page_offset = MYRI10GE_ALLOC_SIZE;
2198 ss->rx_small.watchdog_needed = 0;
2199 ss->rx_big.watchdog_needed = 0;
2200 if (mgp->small_bytes == 0) {
2201 ss->rx_small.fill_cnt = ss->rx_small.mask + 1;
2202 } else {
2203 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
2204 mgp->small_bytes + MXGEFW_PAD, 0);
2205 }
2206
2207 if (ss->rx_small.fill_cnt < ss->rx_small.mask + 1) {
2208 netdev_err(dev, "slice-%d: alloced only %d small bufs\n",
2209 slice, ss->rx_small.fill_cnt);
2210 goto abort_with_rx_small_ring;
2211 }
2212
2213 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
2214 if (ss->rx_big.fill_cnt < ss->rx_big.mask + 1) {
2215 netdev_err(dev, "slice-%d: alloced only %d big bufs\n",
2216 slice, ss->rx_big.fill_cnt);
2217 goto abort_with_rx_big_ring;
2218 }
2219
2220 return 0;
2221
2222 abort_with_rx_big_ring:
2223 for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2224 int idx = i & ss->rx_big.mask;
2225 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2226 mgp->big_bytes);
2227 put_page(ss->rx_big.info[idx].page);
2228 }
2229
2230 abort_with_rx_small_ring:
2231 if (mgp->small_bytes == 0)
2232 ss->rx_small.fill_cnt = ss->rx_small.cnt;
2233 for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2234 int idx = i & ss->rx_small.mask;
2235 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2236 mgp->small_bytes + MXGEFW_PAD);
2237 put_page(ss->rx_small.info[idx].page);
2238 }
2239
2240 kfree(ss->rx_big.info);
2241
2242 abort_with_rx_small_info:
2243 kfree(ss->rx_small.info);
2244
2245 abort_with_tx_info:
2246 kfree(ss->tx.info);
2247
2248 abort_with_rx_big_shadow:
2249 kfree(ss->rx_big.shadow);
2250
2251 abort_with_rx_small_shadow:
2252 kfree(ss->rx_small.shadow);
2253
2254 abort_with_tx_req_bytes:
2255 kfree(ss->tx.req_bytes);
2256 ss->tx.req_bytes = NULL;
2257 ss->tx.req_list = NULL;
2258
2259 abort_with_nothing:
2260 return status;
2261 }
2262
2263 static void myri10ge_free_rings(struct myri10ge_slice_state *ss)
2264 {
2265 struct myri10ge_priv *mgp = ss->mgp;
2266 struct sk_buff *skb;
2267 struct myri10ge_tx_buf *tx;
2268 int i, len, idx;
2269
2270 /* If not allocated, skip it */
2271 if (ss->tx.req_list == NULL)
2272 return;
2273
2274 for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2275 idx = i & ss->rx_big.mask;
2276 if (i == ss->rx_big.fill_cnt - 1)
2277 ss->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE;
2278 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2279 mgp->big_bytes);
2280 put_page(ss->rx_big.info[idx].page);
2281 }
2282
2283 if (mgp->small_bytes == 0)
2284 ss->rx_small.fill_cnt = ss->rx_small.cnt;
2285 for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2286 idx = i & ss->rx_small.mask;
2287 if (i == ss->rx_small.fill_cnt - 1)
2288 ss->rx_small.info[idx].page_offset =
2289 MYRI10GE_ALLOC_SIZE;
2290 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2291 mgp->small_bytes + MXGEFW_PAD);
2292 put_page(ss->rx_small.info[idx].page);
2293 }
2294 tx = &ss->tx;
2295 while (tx->done != tx->req) {
2296 idx = tx->done & tx->mask;
2297 skb = tx->info[idx].skb;
2298
2299 /* Mark as free */
2300 tx->info[idx].skb = NULL;
2301 tx->done++;
2302 len = dma_unmap_len(&tx->info[idx], len);
2303 dma_unmap_len_set(&tx->info[idx], len, 0);
2304 if (skb) {
2305 ss->stats.tx_dropped++;
2306 dev_kfree_skb_any(skb);
2307 if (len)
2308 pci_unmap_single(mgp->pdev,
2309 dma_unmap_addr(&tx->info[idx],
2310 bus), len,
2311 PCI_DMA_TODEVICE);
2312 } else {
2313 if (len)
2314 pci_unmap_page(mgp->pdev,
2315 dma_unmap_addr(&tx->info[idx],
2316 bus), len,
2317 PCI_DMA_TODEVICE);
2318 }
2319 }
2320 kfree(ss->rx_big.info);
2321
2322 kfree(ss->rx_small.info);
2323
2324 kfree(ss->tx.info);
2325
2326 kfree(ss->rx_big.shadow);
2327
2328 kfree(ss->rx_small.shadow);
2329
2330 kfree(ss->tx.req_bytes);
2331 ss->tx.req_bytes = NULL;
2332 ss->tx.req_list = NULL;
2333 }
2334
2335 static int myri10ge_request_irq(struct myri10ge_priv *mgp)
2336 {
2337 struct pci_dev *pdev = mgp->pdev;
2338 struct myri10ge_slice_state *ss;
2339 struct net_device *netdev = mgp->dev;
2340 int i;
2341 int status;
2342
2343 mgp->msi_enabled = 0;
2344 mgp->msix_enabled = 0;
2345 status = 0;
2346 if (myri10ge_msi) {
2347 if (mgp->num_slices > 1) {
2348 status = pci_enable_msix_range(pdev, mgp->msix_vectors,
2349 mgp->num_slices, mgp->num_slices);
2350 if (status < 0) {
2351 dev_err(&pdev->dev,
2352 "Error %d setting up MSI-X\n", status);
2353 return status;
2354 }
2355 mgp->msix_enabled = 1;
2356 }
2357 if (mgp->msix_enabled == 0) {
2358 status = pci_enable_msi(pdev);
2359 if (status != 0) {
2360 dev_err(&pdev->dev,
2361 "Error %d setting up MSI; falling back to xPIC\n",
2362 status);
2363 } else {
2364 mgp->msi_enabled = 1;
2365 }
2366 }
2367 }
2368 if (mgp->msix_enabled) {
2369 for (i = 0; i < mgp->num_slices; i++) {
2370 ss = &mgp->ss[i];
2371 snprintf(ss->irq_desc, sizeof(ss->irq_desc),
2372 "%s:slice-%d", netdev->name, i);
2373 status = request_irq(mgp->msix_vectors[i].vector,
2374 myri10ge_intr, 0, ss->irq_desc,
2375 ss);
2376 if (status != 0) {
2377 dev_err(&pdev->dev,
2378 "slice %d failed to allocate IRQ\n", i);
2379 i--;
2380 while (i >= 0) {
2381 free_irq(mgp->msix_vectors[i].vector,
2382 &mgp->ss[i]);
2383 i--;
2384 }
2385 pci_disable_msix(pdev);
2386 return status;
2387 }
2388 }
2389 } else {
2390 status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED,
2391 mgp->dev->name, &mgp->ss[0]);
2392 if (status != 0) {
2393 dev_err(&pdev->dev, "failed to allocate IRQ\n");
2394 if (mgp->msi_enabled)
2395 pci_disable_msi(pdev);
2396 }
2397 }
2398 return status;
2399 }
2400
2401 static void myri10ge_free_irq(struct myri10ge_priv *mgp)
2402 {
2403 struct pci_dev *pdev = mgp->pdev;
2404 int i;
2405
2406 if (mgp->msix_enabled) {
2407 for (i = 0; i < mgp->num_slices; i++)
2408 free_irq(mgp->msix_vectors[i].vector, &mgp->ss[i]);
2409 } else {
2410 free_irq(pdev->irq, &mgp->ss[0]);
2411 }
2412 if (mgp->msi_enabled)
2413 pci_disable_msi(pdev);
2414 if (mgp->msix_enabled)
2415 pci_disable_msix(pdev);
2416 }
2417
2418 static int myri10ge_get_txrx(struct myri10ge_priv *mgp, int slice)
2419 {
2420 struct myri10ge_cmd cmd;
2421 struct myri10ge_slice_state *ss;
2422 int status;
2423
2424 ss = &mgp->ss[slice];
2425 status = 0;
2426 if (slice == 0 || (mgp->dev->real_num_tx_queues > 1)) {
2427 cmd.data0 = slice;
2428 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET,
2429 &cmd, 0);
2430 ss->tx.lanai = (struct mcp_kreq_ether_send __iomem *)
2431 (mgp->sram + cmd.data0);
2432 }
2433 cmd.data0 = slice;
2434 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET,
2435 &cmd, 0);
2436 ss->rx_small.lanai = (struct mcp_kreq_ether_recv __iomem *)
2437 (mgp->sram + cmd.data0);
2438
2439 cmd.data0 = slice;
2440 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0);
2441 ss->rx_big.lanai = (struct mcp_kreq_ether_recv __iomem *)
2442 (mgp->sram + cmd.data0);
2443
2444 ss->tx.send_go = (__iomem __be32 *)
2445 (mgp->sram + MXGEFW_ETH_SEND_GO + 64 * slice);
2446 ss->tx.send_stop = (__iomem __be32 *)
2447 (mgp->sram + MXGEFW_ETH_SEND_STOP + 64 * slice);
2448 return status;
2449
2450 }
2451
2452 static int myri10ge_set_stats(struct myri10ge_priv *mgp, int slice)
2453 {
2454 struct myri10ge_cmd cmd;
2455 struct myri10ge_slice_state *ss;
2456 int status;
2457
2458 ss = &mgp->ss[slice];
2459 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->fw_stats_bus);
2460 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->fw_stats_bus);
2461 cmd.data2 = sizeof(struct mcp_irq_data) | (slice << 16);
2462 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0);
2463 if (status == -ENOSYS) {
2464 dma_addr_t bus = ss->fw_stats_bus;
2465 if (slice != 0)
2466 return -EINVAL;
2467 bus += offsetof(struct mcp_irq_data, send_done_count);
2468 cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus);
2469 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus);
2470 status = myri10ge_send_cmd(mgp,
2471 MXGEFW_CMD_SET_STATS_DMA_OBSOLETE,
2472 &cmd, 0);
2473 /* Firmware cannot support multicast without STATS_DMA_V2 */
2474 mgp->fw_multicast_support = 0;
2475 } else {
2476 mgp->fw_multicast_support = 1;
2477 }
2478 return 0;
2479 }
2480
2481 static int myri10ge_open(struct net_device *dev)
2482 {
2483 struct myri10ge_slice_state *ss;
2484 struct myri10ge_priv *mgp = netdev_priv(dev);
2485 struct myri10ge_cmd cmd;
2486 int i, status, big_pow2, slice;
2487 u8 __iomem *itable;
2488
2489 if (mgp->running != MYRI10GE_ETH_STOPPED)
2490 return -EBUSY;
2491
2492 mgp->running = MYRI10GE_ETH_STARTING;
2493 status = myri10ge_reset(mgp);
2494 if (status != 0) {
2495 netdev_err(dev, "failed reset\n");
2496 goto abort_with_nothing;
2497 }
2498
2499 if (mgp->num_slices > 1) {
2500 cmd.data0 = mgp->num_slices;
2501 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
2502 if (mgp->dev->real_num_tx_queues > 1)
2503 cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
2504 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
2505 &cmd, 0);
2506 if (status != 0) {
2507 netdev_err(dev, "failed to set number of slices\n");
2508 goto abort_with_nothing;
2509 }
2510 /* setup the indirection table */
2511 cmd.data0 = mgp->num_slices;
2512 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_TABLE_SIZE,
2513 &cmd, 0);
2514
2515 status |= myri10ge_send_cmd(mgp,
2516 MXGEFW_CMD_GET_RSS_TABLE_OFFSET,
2517 &cmd, 0);
2518 if (status != 0) {
2519 netdev_err(dev, "failed to setup rss tables\n");
2520 goto abort_with_nothing;
2521 }
2522
2523 /* just enable an identity mapping */
2524 itable = mgp->sram + cmd.data0;
2525 for (i = 0; i < mgp->num_slices; i++)
2526 __raw_writeb(i, &itable[i]);
2527
2528 cmd.data0 = 1;
2529 cmd.data1 = myri10ge_rss_hash;
2530 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_ENABLE,
2531 &cmd, 0);
2532 if (status != 0) {
2533 netdev_err(dev, "failed to enable slices\n");
2534 goto abort_with_nothing;
2535 }
2536 }
2537
2538 status = myri10ge_request_irq(mgp);
2539 if (status != 0)
2540 goto abort_with_nothing;
2541
2542 /* decide what small buffer size to use. For good TCP rx
2543 * performance, it is important to not receive 1514 byte
2544 * frames into jumbo buffers, as it confuses the socket buffer
2545 * accounting code, leading to drops and erratic performance.
2546 */
2547
2548 if (dev->mtu <= ETH_DATA_LEN)
2549 /* enough for a TCP header */
2550 mgp->small_bytes = (128 > SMP_CACHE_BYTES)
2551 ? (128 - MXGEFW_PAD)
2552 : (SMP_CACHE_BYTES - MXGEFW_PAD);
2553 else
2554 /* enough for a vlan encapsulated ETH_DATA_LEN frame */
2555 mgp->small_bytes = VLAN_ETH_FRAME_LEN;
2556
2557 /* Override the small buffer size? */
2558 if (myri10ge_small_bytes >= 0)
2559 mgp->small_bytes = myri10ge_small_bytes;
2560
2561 /* Firmware needs the big buff size as a power of 2. Lie and
2562 * tell him the buffer is larger, because we only use 1
2563 * buffer/pkt, and the mtu will prevent overruns.
2564 */
2565 big_pow2 = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2566 if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) {
2567 while (!is_power_of_2(big_pow2))
2568 big_pow2++;
2569 mgp->big_bytes = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2570 } else {
2571 big_pow2 = MYRI10GE_ALLOC_SIZE;
2572 mgp->big_bytes = big_pow2;
2573 }
2574
2575 /* setup the per-slice data structures */
2576 for (slice = 0; slice < mgp->num_slices; slice++) {
2577 ss = &mgp->ss[slice];
2578
2579 status = myri10ge_get_txrx(mgp, slice);
2580 if (status != 0) {
2581 netdev_err(dev, "failed to get ring sizes or locations\n");
2582 goto abort_with_rings;
2583 }
2584 status = myri10ge_allocate_rings(ss);
2585 if (status != 0)
2586 goto abort_with_rings;
2587
2588 /* only firmware which supports multiple TX queues
2589 * supports setting up the tx stats on non-zero
2590 * slices */
2591 if (slice == 0 || mgp->dev->real_num_tx_queues > 1)
2592 status = myri10ge_set_stats(mgp, slice);
2593 if (status) {
2594 netdev_err(dev, "Couldn't set stats DMA\n");
2595 goto abort_with_rings;
2596 }
2597
2598 /* Initialize the slice spinlock and state used for polling */
2599 myri10ge_ss_init_lock(ss);
2600
2601 /* must happen prior to any irq */
2602 napi_enable(&(ss)->napi);
2603 }
2604
2605 /* now give firmware buffers sizes, and MTU */
2606 cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
2607 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0);
2608 cmd.data0 = mgp->small_bytes;
2609 status |=
2610 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0);
2611 cmd.data0 = big_pow2;
2612 status |=
2613 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0);
2614 if (status) {
2615 netdev_err(dev, "Couldn't set buffer sizes\n");
2616 goto abort_with_rings;
2617 }
2618
2619 /*
2620 * Set Linux style TSO mode; this is needed only on newer
2621 * firmware versions. Older versions default to Linux
2622 * style TSO
2623 */
2624 cmd.data0 = 0;
2625 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_TSO_MODE, &cmd, 0);
2626 if (status && status != -ENOSYS) {
2627 netdev_err(dev, "Couldn't set TSO mode\n");
2628 goto abort_with_rings;
2629 }
2630
2631 mgp->link_state = ~0U;
2632 mgp->rdma_tags_available = 15;
2633
2634 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0);
2635 if (status) {
2636 netdev_err(dev, "Couldn't bring up link\n");
2637 goto abort_with_rings;
2638 }
2639
2640 mgp->running = MYRI10GE_ETH_RUNNING;
2641 mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ;
2642 add_timer(&mgp->watchdog_timer);
2643 netif_tx_wake_all_queues(dev);
2644
2645 return 0;
2646
2647 abort_with_rings:
2648 while (slice) {
2649 slice--;
2650 napi_disable(&mgp->ss[slice].napi);
2651 }
2652 for (i = 0; i < mgp->num_slices; i++)
2653 myri10ge_free_rings(&mgp->ss[i]);
2654
2655 myri10ge_free_irq(mgp);
2656
2657 abort_with_nothing:
2658 mgp->running = MYRI10GE_ETH_STOPPED;
2659 return -ENOMEM;
2660 }
2661
2662 static int myri10ge_close(struct net_device *dev)
2663 {
2664 struct myri10ge_priv *mgp = netdev_priv(dev);
2665 struct myri10ge_cmd cmd;
2666 int status, old_down_cnt;
2667 int i;
2668
2669 if (mgp->running != MYRI10GE_ETH_RUNNING)
2670 return 0;
2671
2672 if (mgp->ss[0].tx.req_bytes == NULL)
2673 return 0;
2674
2675 del_timer_sync(&mgp->watchdog_timer);
2676 mgp->running = MYRI10GE_ETH_STOPPING;
2677 local_bh_disable(); /* myri10ge_ss_lock_napi needs bh disabled */
2678 for (i = 0; i < mgp->num_slices; i++) {
2679 napi_disable(&mgp->ss[i].napi);
2680 /* Lock the slice to prevent the busy_poll handler from
2681 * accessing it. Later when we bring the NIC up, myri10ge_open
2682 * resets the slice including this lock.
2683 */
2684 while (!myri10ge_ss_lock_napi(&mgp->ss[i])) {
2685 pr_info("Slice %d locked\n", i);
2686 mdelay(1);
2687 }
2688 }
2689 local_bh_enable();
2690 netif_carrier_off(dev);
2691
2692 netif_tx_stop_all_queues(dev);
2693 if (mgp->rebooted == 0) {
2694 old_down_cnt = mgp->down_cnt;
2695 mb();
2696 status =
2697 myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0);
2698 if (status)
2699 netdev_err(dev, "Couldn't bring down link\n");
2700
2701 wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt,
2702 HZ);
2703 if (old_down_cnt == mgp->down_cnt)
2704 netdev_err(dev, "never got down irq\n");
2705 }
2706 netif_tx_disable(dev);
2707 myri10ge_free_irq(mgp);
2708 for (i = 0; i < mgp->num_slices; i++)
2709 myri10ge_free_rings(&mgp->ss[i]);
2710
2711 mgp->running = MYRI10GE_ETH_STOPPED;
2712 return 0;
2713 }
2714
2715 /* copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
2716 * backwards one at a time and handle ring wraps */
2717
2718 static inline void
2719 myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx,
2720 struct mcp_kreq_ether_send *src, int cnt)
2721 {
2722 int idx, starting_slot;
2723 starting_slot = tx->req;
2724 while (cnt > 1) {
2725 cnt--;
2726 idx = (starting_slot + cnt) & tx->mask;
2727 myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src));
2728 mb();
2729 }
2730 }
2731
2732 /*
2733 * copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
2734 * at most 32 bytes at a time, so as to avoid involving the software
2735 * pio handler in the nic. We re-write the first segment's flags
2736 * to mark them valid only after writing the entire chain.
2737 */
2738
2739 static inline void
2740 myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src,
2741 int cnt)
2742 {
2743 int idx, i;
2744 struct mcp_kreq_ether_send __iomem *dstp, *dst;
2745 struct mcp_kreq_ether_send *srcp;
2746 u8 last_flags;
2747
2748 idx = tx->req & tx->mask;
2749
2750 last_flags = src->flags;
2751 src->flags = 0;
2752 mb();
2753 dst = dstp = &tx->lanai[idx];
2754 srcp = src;
2755
2756 if ((idx + cnt) < tx->mask) {
2757 for (i = 0; i < (cnt - 1); i += 2) {
2758 myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src));
2759 mb(); /* force write every 32 bytes */
2760 srcp += 2;
2761 dstp += 2;
2762 }
2763 } else {
2764 /* submit all but the first request, and ensure
2765 * that it is submitted below */
2766 myri10ge_submit_req_backwards(tx, src, cnt);
2767 i = 0;
2768 }
2769 if (i < cnt) {
2770 /* submit the first request */
2771 myri10ge_pio_copy(dstp, srcp, sizeof(*src));
2772 mb(); /* barrier before setting valid flag */
2773 }
2774
2775 /* re-write the last 32-bits with the valid flags */
2776 src->flags = last_flags;
2777 put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3);
2778 tx->req += cnt;
2779 mb();
2780 }
2781
2782 static void myri10ge_unmap_tx_dma(struct myri10ge_priv *mgp,
2783 struct myri10ge_tx_buf *tx, int idx)
2784 {
2785 unsigned int len;
2786 int last_idx;
2787
2788 /* Free any DMA resources we've alloced and clear out the skb slot */
2789 last_idx = (idx + 1) & tx->mask;
2790 idx = tx->req & tx->mask;
2791 do {
2792 len = dma_unmap_len(&tx->info[idx], len);
2793 if (len) {
2794 if (tx->info[idx].skb != NULL)
2795 pci_unmap_single(mgp->pdev,
2796 dma_unmap_addr(&tx->info[idx],
2797 bus), len,
2798 PCI_DMA_TODEVICE);
2799 else
2800 pci_unmap_page(mgp->pdev,
2801 dma_unmap_addr(&tx->info[idx],
2802 bus), len,
2803 PCI_DMA_TODEVICE);
2804 dma_unmap_len_set(&tx->info[idx], len, 0);
2805 tx->info[idx].skb = NULL;
2806 }
2807 idx = (idx + 1) & tx->mask;
2808 } while (idx != last_idx);
2809 }
2810
2811 /*
2812 * Transmit a packet. We need to split the packet so that a single
2813 * segment does not cross myri10ge->tx_boundary, so this makes segment
2814 * counting tricky. So rather than try to count segments up front, we
2815 * just give up if there are too few segments to hold a reasonably
2816 * fragmented packet currently available. If we run
2817 * out of segments while preparing a packet for DMA, we just linearize
2818 * it and try again.
2819 */
2820
2821 static netdev_tx_t myri10ge_xmit(struct sk_buff *skb,
2822 struct net_device *dev)
2823 {
2824 struct myri10ge_priv *mgp = netdev_priv(dev);
2825 struct myri10ge_slice_state *ss;
2826 struct mcp_kreq_ether_send *req;
2827 struct myri10ge_tx_buf *tx;
2828 struct skb_frag_struct *frag;
2829 struct netdev_queue *netdev_queue;
2830 dma_addr_t bus;
2831 u32 low;
2832 __be32 high_swapped;
2833 unsigned int len;
2834 int idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
2835 u16 pseudo_hdr_offset, cksum_offset, queue;
2836 int cum_len, seglen, boundary, rdma_count;
2837 u8 flags, odd_flag;
2838
2839 queue = skb_get_queue_mapping(skb);
2840 ss = &mgp->ss[queue];
2841 netdev_queue = netdev_get_tx_queue(mgp->dev, queue);
2842 tx = &ss->tx;
2843
2844 again:
2845 req = tx->req_list;
2846 avail = tx->mask - 1 - (tx->req - tx->done);
2847
2848 mss = 0;
2849 max_segments = MXGEFW_MAX_SEND_DESC;
2850
2851 if (skb_is_gso(skb)) {
2852 mss = skb_shinfo(skb)->gso_size;
2853 max_segments = MYRI10GE_MAX_SEND_DESC_TSO;
2854 }
2855
2856 if ((unlikely(avail < max_segments))) {
2857 /* we are out of transmit resources */
2858 tx->stop_queue++;
2859 netif_tx_stop_queue(netdev_queue);
2860 return NETDEV_TX_BUSY;
2861 }
2862
2863 /* Setup checksum offloading, if needed */
2864 cksum_offset = 0;
2865 pseudo_hdr_offset = 0;
2866 odd_flag = 0;
2867 flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
2868 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2869 cksum_offset = skb_checksum_start_offset(skb);
2870 pseudo_hdr_offset = cksum_offset + skb->csum_offset;
2871 /* If the headers are excessively large, then we must
2872 * fall back to a software checksum */
2873 if (unlikely(!mss && (cksum_offset > 255 ||
2874 pseudo_hdr_offset > 127))) {
2875 if (skb_checksum_help(skb))
2876 goto drop;
2877 cksum_offset = 0;
2878 pseudo_hdr_offset = 0;
2879 } else {
2880 odd_flag = MXGEFW_FLAGS_ALIGN_ODD;
2881 flags |= MXGEFW_FLAGS_CKSUM;
2882 }
2883 }
2884
2885 cum_len = 0;
2886
2887 if (mss) { /* TSO */
2888 /* this removes any CKSUM flag from before */
2889 flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST);
2890
2891 /* negative cum_len signifies to the
2892 * send loop that we are still in the
2893 * header portion of the TSO packet.
2894 * TSO header can be at most 1KB long */
2895 cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb));
2896
2897 /* for IPv6 TSO, the checksum offset stores the
2898 * TCP header length, to save the firmware from
2899 * the need to parse the headers */
2900 if (skb_is_gso_v6(skb)) {
2901 cksum_offset = tcp_hdrlen(skb);
2902 /* Can only handle headers <= max_tso6 long */
2903 if (unlikely(-cum_len > mgp->max_tso6))
2904 return myri10ge_sw_tso(skb, dev);
2905 }
2906 /* for TSO, pseudo_hdr_offset holds mss.
2907 * The firmware figures out where to put
2908 * the checksum by parsing the header. */
2909 pseudo_hdr_offset = mss;
2910 } else
2911 /* Mark small packets, and pad out tiny packets */
2912 if (skb->len <= MXGEFW_SEND_SMALL_SIZE) {
2913 flags |= MXGEFW_FLAGS_SMALL;
2914
2915 /* pad frames to at least ETH_ZLEN bytes */
2916 if (unlikely(skb->len < ETH_ZLEN)) {
2917 if (skb_padto(skb, ETH_ZLEN)) {
2918 /* The packet is gone, so we must
2919 * return 0 */
2920 ss->stats.tx_dropped += 1;
2921 return NETDEV_TX_OK;
2922 }
2923 /* adjust the len to account for the zero pad
2924 * so that the nic can know how long it is */
2925 skb->len = ETH_ZLEN;
2926 }
2927 }
2928
2929 /* map the skb for DMA */
2930 len = skb_headlen(skb);
2931 bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE);
2932 if (unlikely(pci_dma_mapping_error(mgp->pdev, bus)))
2933 goto drop;
2934
2935 idx = tx->req & tx->mask;
2936 tx->info[idx].skb = skb;
2937 dma_unmap_addr_set(&tx->info[idx], bus, bus);
2938 dma_unmap_len_set(&tx->info[idx], len, len);
2939
2940 frag_cnt = skb_shinfo(skb)->nr_frags;
2941 frag_idx = 0;
2942 count = 0;
2943 rdma_count = 0;
2944
2945 /* "rdma_count" is the number of RDMAs belonging to the
2946 * current packet BEFORE the current send request. For
2947 * non-TSO packets, this is equal to "count".
2948 * For TSO packets, rdma_count needs to be reset
2949 * to 0 after a segment cut.
2950 *
2951 * The rdma_count field of the send request is
2952 * the number of RDMAs of the packet starting at
2953 * that request. For TSO send requests with one ore more cuts
2954 * in the middle, this is the number of RDMAs starting
2955 * after the last cut in the request. All previous
2956 * segments before the last cut implicitly have 1 RDMA.
2957 *
2958 * Since the number of RDMAs is not known beforehand,
2959 * it must be filled-in retroactively - after each
2960 * segmentation cut or at the end of the entire packet.
2961 */
2962
2963 while (1) {
2964 /* Break the SKB or Fragment up into pieces which
2965 * do not cross mgp->tx_boundary */
2966 low = MYRI10GE_LOWPART_TO_U32(bus);
2967 high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
2968 while (len) {
2969 u8 flags_next;
2970 int cum_len_next;
2971
2972 if (unlikely(count == max_segments))
2973 goto abort_linearize;
2974
2975 boundary =
2976 (low + mgp->tx_boundary) & ~(mgp->tx_boundary - 1);
2977 seglen = boundary - low;
2978 if (seglen > len)
2979 seglen = len;
2980 flags_next = flags & ~MXGEFW_FLAGS_FIRST;
2981 cum_len_next = cum_len + seglen;
2982 if (mss) { /* TSO */
2983 (req - rdma_count)->rdma_count = rdma_count + 1;
2984
2985 if (likely(cum_len >= 0)) { /* payload */
2986 int next_is_first, chop;
2987
2988 chop = (cum_len_next > mss);
2989 cum_len_next = cum_len_next % mss;
2990 next_is_first = (cum_len_next == 0);
2991 flags |= chop * MXGEFW_FLAGS_TSO_CHOP;
2992 flags_next |= next_is_first *
2993 MXGEFW_FLAGS_FIRST;
2994 rdma_count |= -(chop | next_is_first);
2995 rdma_count += chop & ~next_is_first;
2996 } else if (likely(cum_len_next >= 0)) { /* header ends */
2997 int small;
2998
2999 rdma_count = -1;
3000 cum_len_next = 0;
3001 seglen = -cum_len;
3002 small = (mss <= MXGEFW_SEND_SMALL_SIZE);
3003 flags_next = MXGEFW_FLAGS_TSO_PLD |
3004 MXGEFW_FLAGS_FIRST |
3005 (small * MXGEFW_FLAGS_SMALL);
3006 }
3007 }
3008 req->addr_high = high_swapped;
3009 req->addr_low = htonl(low);
3010 req->pseudo_hdr_offset = htons(pseudo_hdr_offset);
3011 req->pad = 0; /* complete solid 16-byte block; does this matter? */
3012 req->rdma_count = 1;
3013 req->length = htons(seglen);
3014 req->cksum_offset = cksum_offset;
3015 req->flags = flags | ((cum_len & 1) * odd_flag);
3016
3017 low += seglen;
3018 len -= seglen;
3019 cum_len = cum_len_next;
3020 flags = flags_next;
3021 req++;
3022 count++;
3023 rdma_count++;
3024 if (cksum_offset != 0 && !(mss && skb_is_gso_v6(skb))) {
3025 if (unlikely(cksum_offset > seglen))
3026 cksum_offset -= seglen;
3027 else
3028 cksum_offset = 0;
3029 }
3030 }
3031 if (frag_idx == frag_cnt)
3032 break;
3033
3034 /* map next fragment for DMA */
3035 frag = &skb_shinfo(skb)->frags[frag_idx];
3036 frag_idx++;
3037 len = skb_frag_size(frag);
3038 bus = skb_frag_dma_map(&mgp->pdev->dev, frag, 0, len,
3039 DMA_TO_DEVICE);
3040 if (unlikely(pci_dma_mapping_error(mgp->pdev, bus))) {
3041 myri10ge_unmap_tx_dma(mgp, tx, idx);
3042 goto drop;
3043 }
3044 idx = (count + tx->req) & tx->mask;
3045 dma_unmap_addr_set(&tx->info[idx], bus, bus);
3046 dma_unmap_len_set(&tx->info[idx], len, len);
3047 }
3048
3049 (req - rdma_count)->rdma_count = rdma_count;
3050 if (mss)
3051 do {
3052 req--;
3053 req->flags |= MXGEFW_FLAGS_TSO_LAST;
3054 } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP |
3055 MXGEFW_FLAGS_FIRST)));
3056 idx = ((count - 1) + tx->req) & tx->mask;
3057 tx->info[idx].last = 1;
3058 myri10ge_submit_req(tx, tx->req_list, count);
3059 /* if using multiple tx queues, make sure NIC polls the
3060 * current slice */
3061 if ((mgp->dev->real_num_tx_queues > 1) && tx->queue_active == 0) {
3062 tx->queue_active = 1;
3063 put_be32(htonl(1), tx->send_go);
3064 mb();
3065 mmiowb();
3066 }
3067 tx->pkt_start++;
3068 if ((avail - count) < MXGEFW_MAX_SEND_DESC) {
3069 tx->stop_queue++;
3070 netif_tx_stop_queue(netdev_queue);
3071 }
3072 return NETDEV_TX_OK;
3073
3074 abort_linearize:
3075 myri10ge_unmap_tx_dma(mgp, tx, idx);
3076
3077 if (skb_is_gso(skb)) {
3078 netdev_err(mgp->dev, "TSO but wanted to linearize?!?!?\n");
3079 goto drop;
3080 }
3081
3082 if (skb_linearize(skb))
3083 goto drop;
3084
3085 tx->linearized++;
3086 goto again;
3087
3088 drop:
3089 dev_kfree_skb_any(skb);
3090 ss->stats.tx_dropped += 1;
3091 return NETDEV_TX_OK;
3092
3093 }
3094
3095 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
3096 struct net_device *dev)
3097 {
3098 struct sk_buff *segs, *curr;
3099 struct myri10ge_priv *mgp = netdev_priv(dev);
3100 struct myri10ge_slice_state *ss;
3101 netdev_tx_t status;
3102
3103 segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO6);
3104 if (IS_ERR(segs))
3105 goto drop;
3106
3107 while (segs) {
3108 curr = segs;
3109 segs = segs->next;
3110 curr->next = NULL;
3111 status = myri10ge_xmit(curr, dev);
3112 if (status != 0) {
3113 dev_kfree_skb_any(curr);
3114 if (segs != NULL) {
3115 curr = segs;
3116 segs = segs->next;
3117 curr->next = NULL;
3118 dev_kfree_skb_any(segs);
3119 }
3120 goto drop;
3121 }
3122 }
3123 dev_kfree_skb_any(skb);
3124 return NETDEV_TX_OK;
3125
3126 drop:
3127 ss = &mgp->ss[skb_get_queue_mapping(skb)];
3128 dev_kfree_skb_any(skb);
3129 ss->stats.tx_dropped += 1;
3130 return NETDEV_TX_OK;
3131 }
3132
3133 static struct rtnl_link_stats64 *myri10ge_get_stats(struct net_device *dev,
3134 struct rtnl_link_stats64 *stats)
3135 {
3136 const struct myri10ge_priv *mgp = netdev_priv(dev);
3137 const struct myri10ge_slice_netstats *slice_stats;
3138 int i;
3139
3140 for (i = 0; i < mgp->num_slices; i++) {
3141 slice_stats = &mgp->ss[i].stats;
3142 stats->rx_packets += slice_stats->rx_packets;
3143 stats->tx_packets += slice_stats->tx_packets;
3144 stats->rx_bytes += slice_stats->rx_bytes;
3145 stats->tx_bytes += slice_stats->tx_bytes;
3146 stats->rx_dropped += slice_stats->rx_dropped;
3147 stats->tx_dropped += slice_stats->tx_dropped;
3148 }
3149 return stats;
3150 }
3151
3152 static void myri10ge_set_multicast_list(struct net_device *dev)
3153 {
3154 struct myri10ge_priv *mgp = netdev_priv(dev);
3155 struct myri10ge_cmd cmd;
3156 struct netdev_hw_addr *ha;
3157 __be32 data[2] = { 0, 0 };
3158 int err;
3159
3160 /* can be called from atomic contexts,
3161 * pass 1 to force atomicity in myri10ge_send_cmd() */
3162 myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1);
3163
3164 /* This firmware is known to not support multicast */
3165 if (!mgp->fw_multicast_support)
3166 return;
3167
3168 /* Disable multicast filtering */
3169
3170 err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1);
3171 if (err != 0) {
3172 netdev_err(dev, "Failed MXGEFW_ENABLE_ALLMULTI, error status: %d\n",
3173 err);
3174 goto abort;
3175 }
3176
3177 if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) {
3178 /* request to disable multicast filtering, so quit here */
3179 return;
3180 }
3181
3182 /* Flush the filters */
3183
3184 err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS,
3185 &cmd, 1);
3186 if (err != 0) {
3187 netdev_err(dev, "Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS, error status: %d\n",
3188 err);
3189 goto abort;
3190 }
3191
3192 /* Walk the multicast list, and add each address */
3193 netdev_for_each_mc_addr(ha, dev) {
3194 memcpy(data, &ha->addr, ETH_ALEN);
3195 cmd.data0 = ntohl(data[0]);
3196 cmd.data1 = ntohl(data[1]);
3197 err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP,
3198 &cmd, 1);
3199
3200 if (err != 0) {
3201 netdev_err(dev, "Failed MXGEFW_JOIN_MULTICAST_GROUP, error status:%d %pM\n",
3202 err, ha->addr);
3203 goto abort;
3204 }
3205 }
3206 /* Enable multicast filtering */
3207 err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1);
3208 if (err != 0) {
3209 netdev_err(dev, "Failed MXGEFW_DISABLE_ALLMULTI, error status: %d\n",
3210 err);
3211 goto abort;
3212 }
3213
3214 return;
3215
3216 abort:
3217 return;
3218 }
3219
3220 static int myri10ge_set_mac_address(struct net_device *dev, void *addr)
3221 {
3222 struct sockaddr *sa = addr;
3223 struct myri10ge_priv *mgp = netdev_priv(dev);
3224 int status;
3225
3226 if (!is_valid_ether_addr(sa->sa_data))
3227 return -EADDRNOTAVAIL;
3228
3229 status = myri10ge_update_mac_address(mgp, sa->sa_data);
3230 if (status != 0) {
3231 netdev_err(dev, "changing mac address failed with %d\n",
3232 status);
3233 return status;
3234 }
3235
3236 /* change the dev structure */
3237 memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN);
3238 return 0;
3239 }
3240
3241 static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
3242 {
3243 struct myri10ge_priv *mgp = netdev_priv(dev);
3244 int error = 0;
3245
3246 if ((new_mtu < 68) || (ETH_HLEN + new_mtu > MYRI10GE_MAX_ETHER_MTU)) {
3247 netdev_err(dev, "new mtu (%d) is not valid\n", new_mtu);
3248 return -EINVAL;
3249 }
3250 netdev_info(dev, "changing mtu from %d to %d\n", dev->mtu, new_mtu);
3251 if (mgp->running) {
3252 /* if we change the mtu on an active device, we must
3253 * reset the device so the firmware sees the change */
3254 myri10ge_close(dev);
3255 dev->mtu = new_mtu;
3256 myri10ge_open(dev);
3257 } else
3258 dev->mtu = new_mtu;
3259
3260 return error;
3261 }
3262
3263 /*
3264 * Enable ECRC to align PCI-E Completion packets on an 8-byte boundary.
3265 * Only do it if the bridge is a root port since we don't want to disturb
3266 * any other device, except if forced with myri10ge_ecrc_enable > 1.
3267 */
3268
3269 static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
3270 {
3271 struct pci_dev *bridge = mgp->pdev->bus->self;
3272 struct device *dev = &mgp->pdev->dev;
3273 int cap;
3274 unsigned err_cap;
3275 int ret;
3276
3277 if (!myri10ge_ecrc_enable || !bridge)
3278 return;
3279
3280 /* check that the bridge is a root port */
3281 if (pci_pcie_type(bridge) != PCI_EXP_TYPE_ROOT_PORT) {
3282 if (myri10ge_ecrc_enable > 1) {
3283 struct pci_dev *prev_bridge, *old_bridge = bridge;
3284
3285 /* Walk the hierarchy up to the root port
3286 * where ECRC has to be enabled */
3287 do {
3288 prev_bridge = bridge;
3289 bridge = bridge->bus->self;
3290 if (!bridge || prev_bridge == bridge) {
3291 dev_err(dev,
3292 "Failed to find root port"
3293 " to force ECRC\n");
3294 return;
3295 }
3296 } while (pci_pcie_type(bridge) !=
3297 PCI_EXP_TYPE_ROOT_PORT);
3298
3299 dev_info(dev,
3300 "Forcing ECRC on non-root port %s"
3301 " (enabling on root port %s)\n",
3302 pci_name(old_bridge), pci_name(bridge));
3303 } else {
3304 dev_err(dev,
3305 "Not enabling ECRC on non-root port %s\n",
3306 pci_name(bridge));
3307 return;
3308 }
3309 }
3310
3311 cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
3312 if (!cap)
3313 return;
3314
3315 ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap);
3316 if (ret) {
3317 dev_err(dev, "failed reading ext-conf-space of %s\n",
3318 pci_name(bridge));
3319 dev_err(dev, "\t pci=nommconf in use? "
3320 "or buggy/incomplete/absent ACPI MCFG attr?\n");
3321 return;
3322 }
3323 if (!(err_cap & PCI_ERR_CAP_ECRC_GENC))
3324 return;
3325
3326 err_cap |= PCI_ERR_CAP_ECRC_GENE;
3327 pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap);
3328 dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge));
3329 }
3330
3331 /*
3332 * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput
3333 * when the PCI-E Completion packets are aligned on an 8-byte
3334 * boundary. Some PCI-E chip sets always align Completion packets; on
3335 * the ones that do not, the alignment can be enforced by enabling
3336 * ECRC generation (if supported).
3337 *
3338 * When PCI-E Completion packets are not aligned, it is actually more
3339 * efficient to limit Read-DMA transactions to 2KB, rather than 4KB.
3340 *
3341 * If the driver can neither enable ECRC nor verify that it has
3342 * already been enabled, then it must use a firmware image which works
3343 * around unaligned completion packets (myri10ge_rss_ethp_z8e.dat), and it
3344 * should also ensure that it never gives the device a Read-DMA which is
3345 * larger than 2KB by setting the tx_boundary to 2KB. If ECRC is
3346 * enabled, then the driver should use the aligned (myri10ge_rss_eth_z8e.dat)
3347 * firmware image, and set tx_boundary to 4KB.
3348 */
3349
3350 static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
3351 {
3352 struct pci_dev *pdev = mgp->pdev;
3353 struct device *dev = &pdev->dev;
3354 int status;
3355
3356 mgp->tx_boundary = 4096;
3357 /*
3358 * Verify the max read request size was set to 4KB
3359 * before trying the test with 4KB.
3360 */
3361 status = pcie_get_readrq(pdev);
3362 if (status < 0) {
3363 dev_err(dev, "Couldn't read max read req size: %d\n", status);
3364 goto abort;
3365 }
3366 if (status != 4096) {
3367 dev_warn(dev, "Max Read Request size != 4096 (%d)\n", status);
3368 mgp->tx_boundary = 2048;
3369 }
3370 /*
3371 * load the optimized firmware (which assumes aligned PCIe
3372 * completions) in order to see if it works on this host.
3373 */
3374 set_fw_name(mgp, myri10ge_fw_aligned, false);
3375 status = myri10ge_load_firmware(mgp, 1);
3376 if (status != 0) {
3377 goto abort;
3378 }
3379
3380 /*
3381 * Enable ECRC if possible
3382 */
3383 myri10ge_enable_ecrc(mgp);
3384
3385 /*
3386 * Run a DMA test which watches for unaligned completions and
3387 * aborts on the first one seen.
3388 */
3389
3390 status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST);
3391 if (status == 0)
3392 return; /* keep the aligned firmware */
3393
3394 if (status != -E2BIG)
3395 dev_warn(dev, "DMA test failed: %d\n", status);
3396 if (status == -ENOSYS)
3397 dev_warn(dev, "Falling back to ethp! "
3398 "Please install up to date fw\n");
3399 abort:
3400 /* fall back to using the unaligned firmware */
3401 mgp->tx_boundary = 2048;
3402 set_fw_name(mgp, myri10ge_fw_unaligned, false);
3403 }
3404
3405 static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
3406 {
3407 int overridden = 0;
3408
3409 if (myri10ge_force_firmware == 0) {
3410 int link_width;
3411 u16 lnk;
3412
3413 pcie_capability_read_word(mgp->pdev, PCI_EXP_LNKSTA, &lnk);
3414 link_width = (lnk >> 4) & 0x3f;
3415
3416 /* Check to see if Link is less than 8 or if the
3417 * upstream bridge is known to provide aligned
3418 * completions */
3419 if (link_width < 8) {
3420 dev_info(&mgp->pdev->dev, "PCIE x%d Link\n",
3421 link_width);
3422 mgp->tx_boundary = 4096;
3423 set_fw_name(mgp, myri10ge_fw_aligned, false);
3424 } else {
3425 myri10ge_firmware_probe(mgp);
3426 }
3427 } else {
3428 if (myri10ge_force_firmware == 1) {
3429 dev_info(&mgp->pdev->dev,
3430 "Assuming aligned completions (forced)\n");
3431 mgp->tx_boundary = 4096;
3432 set_fw_name(mgp, myri10ge_fw_aligned, false);
3433 } else {
3434 dev_info(&mgp->pdev->dev,
3435 "Assuming unaligned completions (forced)\n");
3436 mgp->tx_boundary = 2048;
3437 set_fw_name(mgp, myri10ge_fw_unaligned, false);
3438 }
3439 }
3440
3441 kparam_block_sysfs_write(myri10ge_fw_name);
3442 if (myri10ge_fw_name != NULL) {
3443 char *fw_name = kstrdup(myri10ge_fw_name, GFP_KERNEL);
3444 if (fw_name) {
3445 overridden = 1;
3446 set_fw_name(mgp, fw_name, true);
3447 }
3448 }
3449 kparam_unblock_sysfs_write(myri10ge_fw_name);
3450
3451 if (mgp->board_number < MYRI10GE_MAX_BOARDS &&
3452 myri10ge_fw_names[mgp->board_number] != NULL &&
3453 strlen(myri10ge_fw_names[mgp->board_number])) {
3454 set_fw_name(mgp, myri10ge_fw_names[mgp->board_number], false);
3455 overridden = 1;
3456 }
3457 if (overridden)
3458 dev_info(&mgp->pdev->dev, "overriding firmware to %s\n",
3459 mgp->fw_name);
3460 }
3461
3462 static void myri10ge_mask_surprise_down(struct pci_dev *pdev)
3463 {
3464 struct pci_dev *bridge = pdev->bus->self;
3465 int cap;
3466 u32 mask;
3467
3468 if (bridge == NULL)
3469 return;
3470
3471 cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
3472 if (cap) {
3473 /* a sram parity error can cause a surprise link
3474 * down; since we expect and can recover from sram
3475 * parity errors, mask surprise link down events */
3476 pci_read_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, &mask);
3477 mask |= 0x20;
3478 pci_write_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, mask);
3479 }
3480 }
3481
3482 #ifdef CONFIG_PM
3483 static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state)
3484 {
3485 struct myri10ge_priv *mgp;
3486 struct net_device *netdev;
3487
3488 mgp = pci_get_drvdata(pdev);
3489 if (mgp == NULL)
3490 return -EINVAL;
3491 netdev = mgp->dev;
3492
3493 netif_device_detach(netdev);
3494 if (netif_running(netdev)) {
3495 netdev_info(netdev, "closing\n");
3496 rtnl_lock();
3497 myri10ge_close(netdev);
3498 rtnl_unlock();
3499 }
3500 myri10ge_dummy_rdma(mgp, 0);
3501 pci_save_state(pdev);
3502 pci_disable_device(pdev);
3503
3504 return pci_set_power_state(pdev, pci_choose_state(pdev, state));
3505 }
3506
3507 static int myri10ge_resume(struct pci_dev *pdev)
3508 {
3509 struct myri10ge_priv *mgp;
3510 struct net_device *netdev;
3511 int status;
3512 u16 vendor;
3513
3514 mgp = pci_get_drvdata(pdev);
3515 if (mgp == NULL)
3516 return -EINVAL;
3517 netdev = mgp->dev;
3518 pci_set_power_state(pdev, PCI_D0); /* zeros conf space as a side effect */
3519 msleep(5); /* give card time to respond */
3520 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3521 if (vendor == 0xffff) {
3522 netdev_err(mgp->dev, "device disappeared!\n");
3523 return -EIO;
3524 }
3525
3526 pci_restore_state(pdev);
3527
3528 status = pci_enable_device(pdev);
3529 if (status) {
3530 dev_err(&pdev->dev, "failed to enable device\n");
3531 return status;
3532 }
3533
3534 pci_set_master(pdev);
3535
3536 myri10ge_reset(mgp);
3537 myri10ge_dummy_rdma(mgp, 1);
3538
3539 /* Save configuration space to be restored if the
3540 * nic resets due to a parity error */
3541 pci_save_state(pdev);
3542
3543 if (netif_running(netdev)) {
3544 rtnl_lock();
3545 status = myri10ge_open(netdev);
3546 rtnl_unlock();
3547 if (status != 0)
3548 goto abort_with_enabled;
3549
3550 }
3551 netif_device_attach(netdev);
3552
3553 return 0;
3554
3555 abort_with_enabled:
3556 pci_disable_device(pdev);
3557 return -EIO;
3558
3559 }
3560 #endif /* CONFIG_PM */
3561
3562 static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp)
3563 {
3564 struct pci_dev *pdev = mgp->pdev;
3565 int vs = mgp->vendor_specific_offset;
3566 u32 reboot;
3567
3568 /*enter read32 mode */
3569 pci_write_config_byte(pdev, vs + 0x10, 0x3);
3570
3571 /*read REBOOT_STATUS (0xfffffff0) */
3572 pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0);
3573 pci_read_config_dword(pdev, vs + 0x14, &reboot);
3574 return reboot;
3575 }
3576
3577 static void
3578 myri10ge_check_slice(struct myri10ge_slice_state *ss, int *reset_needed,
3579 int *busy_slice_cnt, u32 rx_pause_cnt)
3580 {
3581 struct myri10ge_priv *mgp = ss->mgp;
3582 int slice = ss - mgp->ss;
3583
3584 if (ss->tx.req != ss->tx.done &&
3585 ss->tx.done == ss->watchdog_tx_done &&
3586 ss->watchdog_tx_req != ss->watchdog_tx_done) {
3587 /* nic seems like it might be stuck.. */
3588 if (rx_pause_cnt != mgp->watchdog_pause) {
3589 if (net_ratelimit())
3590 netdev_warn(mgp->dev, "slice %d: TX paused, "
3591 "check link partner\n", slice);
3592 } else {
3593 netdev_warn(mgp->dev,
3594 "slice %d: TX stuck %d %d %d %d %d %d\n",
3595 slice, ss->tx.queue_active, ss->tx.req,
3596 ss->tx.done, ss->tx.pkt_start,
3597 ss->tx.pkt_done,
3598 (int)ntohl(mgp->ss[slice].fw_stats->
3599 send_done_count));
3600 *reset_needed = 1;
3601 ss->stuck = 1;
3602 }
3603 }
3604 if (ss->watchdog_tx_done != ss->tx.done ||
3605 ss->watchdog_rx_done != ss->rx_done.cnt) {
3606 *busy_slice_cnt += 1;
3607 }
3608 ss->watchdog_tx_done = ss->tx.done;
3609 ss->watchdog_tx_req = ss->tx.req;
3610 ss->watchdog_rx_done = ss->rx_done.cnt;
3611 }
3612
3613 /*
3614 * This watchdog is used to check whether the board has suffered
3615 * from a parity error and needs to be recovered.
3616 */
3617 static void myri10ge_watchdog(struct work_struct *work)
3618 {
3619 struct myri10ge_priv *mgp =
3620 container_of(work, struct myri10ge_priv, watchdog_work);
3621 struct myri10ge_slice_state *ss;
3622 u32 reboot, rx_pause_cnt;
3623 int status, rebooted;
3624 int i;
3625 int reset_needed = 0;
3626 int busy_slice_cnt = 0;
3627 u16 cmd, vendor;
3628
3629 mgp->watchdog_resets++;
3630 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3631 rebooted = 0;
3632 if ((cmd & PCI_COMMAND_MASTER) == 0) {
3633 /* Bus master DMA disabled? Check to see
3634 * if the card rebooted due to a parity error
3635 * For now, just report it */
3636 reboot = myri10ge_read_reboot(mgp);
3637 netdev_err(mgp->dev, "NIC rebooted (0x%x),%s resetting\n",
3638 reboot, myri10ge_reset_recover ? "" : " not");
3639 if (myri10ge_reset_recover == 0)
3640 return;
3641 rtnl_lock();
3642 mgp->rebooted = 1;
3643 rebooted = 1;
3644 myri10ge_close(mgp->dev);
3645 myri10ge_reset_recover--;
3646 mgp->rebooted = 0;
3647 /*
3648 * A rebooted nic will come back with config space as
3649 * it was after power was applied to PCIe bus.
3650 * Attempt to restore config space which was saved
3651 * when the driver was loaded, or the last time the
3652 * nic was resumed from power saving mode.
3653 */
3654 pci_restore_state(mgp->pdev);
3655
3656 /* save state again for accounting reasons */
3657 pci_save_state(mgp->pdev);
3658
3659 } else {
3660 /* if we get back -1's from our slot, perhaps somebody
3661 * powered off our card. Don't try to reset it in
3662 * this case */
3663 if (cmd == 0xffff) {
3664 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3665 if (vendor == 0xffff) {
3666 netdev_err(mgp->dev, "device disappeared!\n");
3667 return;
3668 }
3669 }
3670 /* Perhaps it is a software error. See if stuck slice
3671 * has recovered, reset if not */
3672 rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3673 for (i = 0; i < mgp->num_slices; i++) {
3674 ss = mgp->ss;
3675 if (ss->stuck) {
3676 myri10ge_check_slice(ss, &reset_needed,
3677 &busy_slice_cnt,
3678 rx_pause_cnt);
3679 ss->stuck = 0;
3680 }
3681 }
3682 if (!reset_needed) {
3683 netdev_dbg(mgp->dev, "not resetting\n");
3684 return;
3685 }
3686
3687 netdev_err(mgp->dev, "device timeout, resetting\n");
3688 }
3689
3690 if (!rebooted) {
3691 rtnl_lock();
3692 myri10ge_close(mgp->dev);
3693 }
3694 status = myri10ge_load_firmware(mgp, 1);
3695 if (status != 0)
3696 netdev_err(mgp->dev, "failed to load firmware\n");
3697 else
3698 myri10ge_open(mgp->dev);
3699 rtnl_unlock();
3700 }
3701
3702 /*
3703 * We use our own timer routine rather than relying upon
3704 * netdev->tx_timeout because we have a very large hardware transmit
3705 * queue. Due to the large queue, the netdev->tx_timeout function
3706 * cannot detect a NIC with a parity error in a timely fashion if the
3707 * NIC is lightly loaded.
3708 */
3709 static void myri10ge_watchdog_timer(unsigned long arg)
3710 {
3711 struct myri10ge_priv *mgp;
3712 struct myri10ge_slice_state *ss;
3713 int i, reset_needed, busy_slice_cnt;
3714 u32 rx_pause_cnt;
3715 u16 cmd;
3716
3717 mgp = (struct myri10ge_priv *)arg;
3718
3719 rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3720 busy_slice_cnt = 0;
3721 for (i = 0, reset_needed = 0;
3722 i < mgp->num_slices && reset_needed == 0; ++i) {
3723
3724 ss = &mgp->ss[i];
3725 if (ss->rx_small.watchdog_needed) {
3726 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
3727 mgp->small_bytes + MXGEFW_PAD,
3728 1);
3729 if (ss->rx_small.fill_cnt - ss->rx_small.cnt >=
3730 myri10ge_fill_thresh)
3731 ss->rx_small.watchdog_needed = 0;
3732 }
3733 if (ss->rx_big.watchdog_needed) {
3734 myri10ge_alloc_rx_pages(mgp, &ss->rx_big,
3735 mgp->big_bytes, 1);
3736 if (ss->rx_big.fill_cnt - ss->rx_big.cnt >=
3737 myri10ge_fill_thresh)
3738 ss->rx_big.watchdog_needed = 0;
3739 }
3740 myri10ge_check_slice(ss, &reset_needed, &busy_slice_cnt,
3741 rx_pause_cnt);
3742 }
3743 /* if we've sent or received no traffic, poll the NIC to
3744 * ensure it is still there. Otherwise, we risk not noticing
3745 * an error in a timely fashion */
3746 if (busy_slice_cnt == 0) {
3747 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3748 if ((cmd & PCI_COMMAND_MASTER) == 0) {
3749 reset_needed = 1;
3750 }
3751 }
3752 mgp->watchdog_pause = rx_pause_cnt;
3753
3754 if (reset_needed) {
3755 schedule_work(&mgp->watchdog_work);
3756 } else {
3757 /* rearm timer */
3758 mod_timer(&mgp->watchdog_timer,
3759 jiffies + myri10ge_watchdog_timeout * HZ);
3760 }
3761 }
3762
3763 static void myri10ge_free_slices(struct myri10ge_priv *mgp)
3764 {
3765 struct myri10ge_slice_state *ss;
3766 struct pci_dev *pdev = mgp->pdev;
3767 size_t bytes;
3768 int i;
3769
3770 if (mgp->ss == NULL)
3771 return;
3772
3773 for (i = 0; i < mgp->num_slices; i++) {
3774 ss = &mgp->ss[i];
3775 if (ss->rx_done.entry != NULL) {
3776 bytes = mgp->max_intr_slots *
3777 sizeof(*ss->rx_done.entry);
3778 dma_free_coherent(&pdev->dev, bytes,
3779 ss->rx_done.entry, ss->rx_done.bus);
3780 ss->rx_done.entry = NULL;
3781 }
3782 if (ss->fw_stats != NULL) {
3783 bytes = sizeof(*ss->fw_stats);
3784 dma_free_coherent(&pdev->dev, bytes,
3785 ss->fw_stats, ss->fw_stats_bus);
3786 ss->fw_stats = NULL;
3787 }
3788 napi_hash_del(&ss->napi);
3789 netif_napi_del(&ss->napi);
3790 }
3791 /* Wait till napi structs are no longer used, and then free ss. */
3792 synchronize_rcu();
3793 kfree(mgp->ss);
3794 mgp->ss = NULL;
3795 }
3796
3797 static int myri10ge_alloc_slices(struct myri10ge_priv *mgp)
3798 {
3799 struct myri10ge_slice_state *ss;
3800 struct pci_dev *pdev = mgp->pdev;
3801 size_t bytes;
3802 int i;
3803
3804 bytes = sizeof(*mgp->ss) * mgp->num_slices;
3805 mgp->ss = kzalloc(bytes, GFP_KERNEL);
3806 if (mgp->ss == NULL) {
3807 return -ENOMEM;
3808 }
3809
3810 for (i = 0; i < mgp->num_slices; i++) {
3811 ss = &mgp->ss[i];
3812 bytes = mgp->max_intr_slots * sizeof(*ss->rx_done.entry);
3813 ss->rx_done.entry = dma_zalloc_coherent(&pdev->dev, bytes,
3814 &ss->rx_done.bus,
3815 GFP_KERNEL);
3816 if (ss->rx_done.entry == NULL)
3817 goto abort;
3818 bytes = sizeof(*ss->fw_stats);
3819 ss->fw_stats = dma_alloc_coherent(&pdev->dev, bytes,
3820 &ss->fw_stats_bus,
3821 GFP_KERNEL);
3822 if (ss->fw_stats == NULL)
3823 goto abort;
3824 ss->mgp = mgp;
3825 ss->dev = mgp->dev;
3826 netif_napi_add(ss->dev, &ss->napi, myri10ge_poll,
3827 myri10ge_napi_weight);
3828 napi_hash_add(&ss->napi);
3829 }
3830 return 0;
3831 abort:
3832 myri10ge_free_slices(mgp);
3833 return -ENOMEM;
3834 }
3835
3836 /*
3837 * This function determines the number of slices supported.
3838 * The number slices is the minimum of the number of CPUS,
3839 * the number of MSI-X irqs supported, the number of slices
3840 * supported by the firmware
3841 */
3842 static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
3843 {
3844 struct myri10ge_cmd cmd;
3845 struct pci_dev *pdev = mgp->pdev;
3846 char *old_fw;
3847 bool old_allocated;
3848 int i, status, ncpus;
3849
3850 mgp->num_slices = 1;
3851 ncpus = netif_get_num_default_rss_queues();
3852
3853 if (myri10ge_max_slices == 1 || !pdev->msix_cap ||
3854 (myri10ge_max_slices == -1 && ncpus < 2))
3855 return;
3856
3857 /* try to load the slice aware rss firmware */
3858 old_fw = mgp->fw_name;
3859 old_allocated = mgp->fw_name_allocated;
3860 /* don't free old_fw if we override it. */
3861 mgp->fw_name_allocated = false;
3862
3863 if (myri10ge_fw_name != NULL) {
3864 dev_info(&mgp->pdev->dev, "overriding rss firmware to %s\n",
3865 myri10ge_fw_name);
3866 set_fw_name(mgp, myri10ge_fw_name, false);
3867 } else if (old_fw == myri10ge_fw_aligned)
3868 set_fw_name(mgp, myri10ge_fw_rss_aligned, false);
3869 else
3870 set_fw_name(mgp, myri10ge_fw_rss_unaligned, false);
3871 status = myri10ge_load_firmware(mgp, 0);
3872 if (status != 0) {
3873 dev_info(&pdev->dev, "Rss firmware not found\n");
3874 if (old_allocated)
3875 kfree(old_fw);
3876 return;
3877 }
3878
3879 /* hit the board with a reset to ensure it is alive */
3880 memset(&cmd, 0, sizeof(cmd));
3881 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
3882 if (status != 0) {
3883 dev_err(&mgp->pdev->dev, "failed reset\n");
3884 goto abort_with_fw;
3885 }
3886
3887 mgp->max_intr_slots = cmd.data0 / sizeof(struct mcp_slot);
3888
3889 /* tell it the size of the interrupt queues */
3890 cmd.data0 = mgp->max_intr_slots * sizeof(struct mcp_slot);
3891 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
3892 if (status != 0) {
3893 dev_err(&mgp->pdev->dev, "failed MXGEFW_CMD_SET_INTRQ_SIZE\n");
3894 goto abort_with_fw;
3895 }
3896
3897 /* ask the maximum number of slices it supports */
3898 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES, &cmd, 0);
3899 if (status != 0)
3900 goto abort_with_fw;
3901 else
3902 mgp->num_slices = cmd.data0;
3903
3904 /* Only allow multiple slices if MSI-X is usable */
3905 if (!myri10ge_msi) {
3906 goto abort_with_fw;
3907 }
3908
3909 /* if the admin did not specify a limit to how many
3910 * slices we should use, cap it automatically to the
3911 * number of CPUs currently online */
3912 if (myri10ge_max_slices == -1)
3913 myri10ge_max_slices = ncpus;
3914
3915 if (mgp->num_slices > myri10ge_max_slices)
3916 mgp->num_slices = myri10ge_max_slices;
3917
3918 /* Now try to allocate as many MSI-X vectors as we have
3919 * slices. We give up on MSI-X if we can only get a single
3920 * vector. */
3921
3922 mgp->msix_vectors = kcalloc(mgp->num_slices, sizeof(*mgp->msix_vectors),
3923 GFP_KERNEL);
3924 if (mgp->msix_vectors == NULL)
3925 goto no_msix;
3926 for (i = 0; i < mgp->num_slices; i++) {
3927 mgp->msix_vectors[i].entry = i;
3928 }
3929
3930 while (mgp->num_slices > 1) {
3931 mgp->num_slices = rounddown_pow_of_two(mgp->num_slices);
3932 if (mgp->num_slices == 1)
3933 goto no_msix;
3934 status = pci_enable_msix_range(pdev,
3935 mgp->msix_vectors,
3936 mgp->num_slices,
3937 mgp->num_slices);
3938 if (status < 0)
3939 goto no_msix;
3940
3941 pci_disable_msix(pdev);
3942
3943 if (status == mgp->num_slices) {
3944 if (old_allocated)
3945 kfree(old_fw);
3946 return;
3947 } else {
3948 mgp->num_slices = status;
3949 }
3950 }
3951
3952 no_msix:
3953 if (mgp->msix_vectors != NULL) {
3954 kfree(mgp->msix_vectors);
3955 mgp->msix_vectors = NULL;
3956 }
3957
3958 abort_with_fw:
3959 mgp->num_slices = 1;
3960 set_fw_name(mgp, old_fw, old_allocated);
3961 myri10ge_load_firmware(mgp, 0);
3962 }
3963
3964 static const struct net_device_ops myri10ge_netdev_ops = {
3965 .ndo_open = myri10ge_open,
3966 .ndo_stop = myri10ge_close,
3967 .ndo_start_xmit = myri10ge_xmit,
3968 .ndo_get_stats64 = myri10ge_get_stats,
3969 .ndo_validate_addr = eth_validate_addr,
3970 .ndo_change_mtu = myri10ge_change_mtu,
3971 .ndo_set_rx_mode = myri10ge_set_multicast_list,
3972 .ndo_set_mac_address = myri10ge_set_mac_address,
3973 #ifdef CONFIG_NET_RX_BUSY_POLL
3974 .ndo_busy_poll = myri10ge_busy_poll,
3975 #endif
3976 };
3977
3978 static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3979 {
3980 struct net_device *netdev;
3981 struct myri10ge_priv *mgp;
3982 struct device *dev = &pdev->dev;
3983 int i;
3984 int status = -ENXIO;
3985 int dac_enabled;
3986 unsigned hdr_offset, ss_offset;
3987 static int board_number;
3988
3989 netdev = alloc_etherdev_mq(sizeof(*mgp), MYRI10GE_MAX_SLICES);
3990 if (netdev == NULL)
3991 return -ENOMEM;
3992
3993 SET_NETDEV_DEV(netdev, &pdev->dev);
3994
3995 mgp = netdev_priv(netdev);
3996 mgp->dev = netdev;
3997 mgp->pdev = pdev;
3998 mgp->pause = myri10ge_flow_control;
3999 mgp->intr_coal_delay = myri10ge_intr_coal_delay;
4000 mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT);
4001 mgp->board_number = board_number;
4002 init_waitqueue_head(&mgp->down_wq);
4003
4004 if (pci_enable_device(pdev)) {
4005 dev_err(&pdev->dev, "pci_enable_device call failed\n");
4006 status = -ENODEV;
4007 goto abort_with_netdev;
4008 }
4009
4010 /* Find the vendor-specific cap so we can check
4011 * the reboot register later on */
4012 mgp->vendor_specific_offset
4013 = pci_find_capability(pdev, PCI_CAP_ID_VNDR);
4014
4015 /* Set our max read request to 4KB */
4016 status = pcie_set_readrq(pdev, 4096);
4017 if (status != 0) {
4018 dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n",
4019 status);
4020 goto abort_with_enabled;
4021 }
4022
4023 myri10ge_mask_surprise_down(pdev);
4024 pci_set_master(pdev);
4025 dac_enabled = 1;
4026 status = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
4027 if (status != 0) {
4028 dac_enabled = 0;
4029 dev_err(&pdev->dev,
4030 "64-bit pci address mask was refused, "
4031 "trying 32-bit\n");
4032 status = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4033 }
4034 if (status != 0) {
4035 dev_err(&pdev->dev, "Error %d setting DMA mask\n", status);
4036 goto abort_with_enabled;
4037 }
4038 (void)pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
4039 mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd),
4040 &mgp->cmd_bus, GFP_KERNEL);
4041 if (mgp->cmd == NULL)
4042 goto abort_with_enabled;
4043
4044 mgp->board_span = pci_resource_len(pdev, 0);
4045 mgp->iomem_base = pci_resource_start(pdev, 0);
4046 mgp->mtrr = -1;
4047 mgp->wc_enabled = 0;
4048 #ifdef CONFIG_MTRR
4049 mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span,
4050 MTRR_TYPE_WRCOMB, 1);
4051 if (mgp->mtrr >= 0)
4052 mgp->wc_enabled = 1;
4053 #endif
4054 mgp->sram = ioremap_wc(mgp->iomem_base, mgp->board_span);
4055 if (mgp->sram == NULL) {
4056 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n",
4057 mgp->board_span, mgp->iomem_base);
4058 status = -ENXIO;
4059 goto abort_with_mtrr;
4060 }
4061 hdr_offset =
4062 swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET)) & 0xffffc;
4063 ss_offset = hdr_offset + offsetof(struct mcp_gen_header, string_specs);
4064 mgp->sram_size = swab32(readl(mgp->sram + ss_offset));
4065 if (mgp->sram_size > mgp->board_span ||
4066 mgp->sram_size <= MYRI10GE_FW_OFFSET) {
4067 dev_err(&pdev->dev,
4068 "invalid sram_size %dB or board span %ldB\n",
4069 mgp->sram_size, mgp->board_span);
4070 goto abort_with_ioremap;
4071 }
4072 memcpy_fromio(mgp->eeprom_strings,
4073 mgp->sram + mgp->sram_size, MYRI10GE_EEPROM_STRINGS_SIZE);
4074 memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2);
4075 status = myri10ge_read_mac_addr(mgp);
4076 if (status)
4077 goto abort_with_ioremap;
4078
4079 for (i = 0; i < ETH_ALEN; i++)
4080 netdev->dev_addr[i] = mgp->mac_addr[i];
4081
4082 myri10ge_select_firmware(mgp);
4083
4084 status = myri10ge_load_firmware(mgp, 1);
4085 if (status != 0) {
4086 dev_err(&pdev->dev, "failed to load firmware\n");
4087 goto abort_with_ioremap;
4088 }
4089 myri10ge_probe_slices(mgp);
4090 status = myri10ge_alloc_slices(mgp);
4091 if (status != 0) {
4092 dev_err(&pdev->dev, "failed to alloc slice state\n");
4093 goto abort_with_firmware;
4094 }
4095 netif_set_real_num_tx_queues(netdev, mgp->num_slices);
4096 netif_set_real_num_rx_queues(netdev, mgp->num_slices);
4097 status = myri10ge_reset(mgp);
4098 if (status != 0) {
4099 dev_err(&pdev->dev, "failed reset\n");
4100 goto abort_with_slices;
4101 }
4102 #ifdef CONFIG_MYRI10GE_DCA
4103 myri10ge_setup_dca(mgp);
4104 #endif
4105 pci_set_drvdata(pdev, mgp);
4106 if ((myri10ge_initial_mtu + ETH_HLEN) > MYRI10GE_MAX_ETHER_MTU)
4107 myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
4108 if ((myri10ge_initial_mtu + ETH_HLEN) < 68)
4109 myri10ge_initial_mtu = 68;
4110
4111 netdev->netdev_ops = &myri10ge_netdev_ops;
4112 netdev->mtu = myri10ge_initial_mtu;
4113 netdev->hw_features = mgp->features | NETIF_F_RXCSUM;
4114
4115 /* fake NETIF_F_HW_VLAN_CTAG_RX for good GRO performance */
4116 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
4117
4118 netdev->features = netdev->hw_features;
4119
4120 if (dac_enabled)
4121 netdev->features |= NETIF_F_HIGHDMA;
4122
4123 netdev->vlan_features |= mgp->features;
4124 if (mgp->fw_ver_tiny < 37)
4125 netdev->vlan_features &= ~NETIF_F_TSO6;
4126 if (mgp->fw_ver_tiny < 32)
4127 netdev->vlan_features &= ~NETIF_F_TSO;
4128
4129 /* make sure we can get an irq, and that MSI can be
4130 * setup (if available). */
4131 status = myri10ge_request_irq(mgp);
4132 if (status != 0)
4133 goto abort_with_firmware;
4134 myri10ge_free_irq(mgp);
4135
4136 /* Save configuration space to be restored if the
4137 * nic resets due to a parity error */
4138 pci_save_state(pdev);
4139
4140 /* Setup the watchdog timer */
4141 setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer,
4142 (unsigned long)mgp);
4143
4144 netdev->ethtool_ops = &myri10ge_ethtool_ops;
4145 INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog);
4146 status = register_netdev(netdev);
4147 if (status != 0) {
4148 dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
4149 goto abort_with_state;
4150 }
4151 if (mgp->msix_enabled)
4152 dev_info(dev, "%d MSI-X IRQs, tx bndry %d, fw %s, WC %s\n",
4153 mgp->num_slices, mgp->tx_boundary, mgp->fw_name,
4154 (mgp->wc_enabled ? "Enabled" : "Disabled"));
4155 else
4156 dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, WC %s\n",
4157 mgp->msi_enabled ? "MSI" : "xPIC",
4158 pdev->irq, mgp->tx_boundary, mgp->fw_name,
4159 (mgp->wc_enabled ? "Enabled" : "Disabled"));
4160
4161 board_number++;
4162 return 0;
4163
4164 abort_with_state:
4165 pci_restore_state(pdev);
4166
4167 abort_with_slices:
4168 myri10ge_free_slices(mgp);
4169
4170 abort_with_firmware:
4171 myri10ge_dummy_rdma(mgp, 0);
4172
4173 abort_with_ioremap:
4174 if (mgp->mac_addr_string != NULL)
4175 dev_err(&pdev->dev,
4176 "myri10ge_probe() failed: MAC=%s, SN=%ld\n",
4177 mgp->mac_addr_string, mgp->serial_number);
4178 iounmap(mgp->sram);
4179
4180 abort_with_mtrr:
4181 #ifdef CONFIG_MTRR
4182 if (mgp->mtrr >= 0)
4183 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
4184 #endif
4185 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
4186 mgp->cmd, mgp->cmd_bus);
4187
4188 abort_with_enabled:
4189 pci_disable_device(pdev);
4190
4191 abort_with_netdev:
4192 set_fw_name(mgp, NULL, false);
4193 free_netdev(netdev);
4194 return status;
4195 }
4196
4197 /*
4198 * myri10ge_remove
4199 *
4200 * Does what is necessary to shutdown one Myrinet device. Called
4201 * once for each Myrinet card by the kernel when a module is
4202 * unloaded.
4203 */
4204 static void myri10ge_remove(struct pci_dev *pdev)
4205 {
4206 struct myri10ge_priv *mgp;
4207 struct net_device *netdev;
4208
4209 mgp = pci_get_drvdata(pdev);
4210 if (mgp == NULL)
4211 return;
4212
4213 cancel_work_sync(&mgp->watchdog_work);
4214 netdev = mgp->dev;
4215 unregister_netdev(netdev);
4216
4217 #ifdef CONFIG_MYRI10GE_DCA
4218 myri10ge_teardown_dca(mgp);
4219 #endif
4220 myri10ge_dummy_rdma(mgp, 0);
4221
4222 /* avoid a memory leak */
4223 pci_restore_state(pdev);
4224
4225 iounmap(mgp->sram);
4226
4227 #ifdef CONFIG_MTRR
4228 if (mgp->mtrr >= 0)
4229 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
4230 #endif
4231 myri10ge_free_slices(mgp);
4232 if (mgp->msix_vectors != NULL)
4233 kfree(mgp->msix_vectors);
4234 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
4235 mgp->cmd, mgp->cmd_bus);
4236
4237 set_fw_name(mgp, NULL, false);
4238 free_netdev(netdev);
4239 pci_disable_device(pdev);
4240 }
4241
4242 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E 0x0008
4243 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9 0x0009
4244
4245 static DEFINE_PCI_DEVICE_TABLE(myri10ge_pci_tbl) = {
4246 {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)},
4247 {PCI_DEVICE
4248 (PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9)},
4249 {0},
4250 };
4251
4252 MODULE_DEVICE_TABLE(pci, myri10ge_pci_tbl);
4253
4254 static struct pci_driver myri10ge_driver = {
4255 .name = "myri10ge",
4256 .probe = myri10ge_probe,
4257 .remove = myri10ge_remove,
4258 .id_table = myri10ge_pci_tbl,
4259 #ifdef CONFIG_PM
4260 .suspend = myri10ge_suspend,
4261 .resume = myri10ge_resume,
4262 #endif
4263 };
4264
4265 #ifdef CONFIG_MYRI10GE_DCA
4266 static int
4267 myri10ge_notify_dca(struct notifier_block *nb, unsigned long event, void *p)
4268 {
4269 int err = driver_for_each_device(&myri10ge_driver.driver,
4270 NULL, &event,
4271 myri10ge_notify_dca_device);
4272
4273 if (err)
4274 return NOTIFY_BAD;
4275 return NOTIFY_DONE;
4276 }
4277
4278 static struct notifier_block myri10ge_dca_notifier = {
4279 .notifier_call = myri10ge_notify_dca,
4280 .next = NULL,
4281 .priority = 0,
4282 };
4283 #endif /* CONFIG_MYRI10GE_DCA */
4284
4285 static __init int myri10ge_init_module(void)
4286 {
4287 pr_info("Version %s\n", MYRI10GE_VERSION_STR);
4288
4289 if (myri10ge_rss_hash > MXGEFW_RSS_HASH_TYPE_MAX) {
4290 pr_err("Illegal rssh hash type %d, defaulting to source port\n",
4291 myri10ge_rss_hash);
4292 myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT;
4293 }
4294 #ifdef CONFIG_MYRI10GE_DCA
4295 dca_register_notify(&myri10ge_dca_notifier);
4296 #endif
4297 if (myri10ge_max_slices > MYRI10GE_MAX_SLICES)
4298 myri10ge_max_slices = MYRI10GE_MAX_SLICES;
4299
4300 return pci_register_driver(&myri10ge_driver);
4301 }
4302
4303 module_init(myri10ge_init_module);
4304
4305 static __exit void myri10ge_cleanup_module(void)
4306 {
4307 #ifdef CONFIG_MYRI10GE_DCA
4308 dca_unregister_notify(&myri10ge_dca_notifier);
4309 #endif
4310 pci_unregister_driver(&myri10ge_driver);
4311 }
4312
4313 module_exit(myri10ge_cleanup_module);
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