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pvrusb2: reduce stack usage pvr2_eeprom_analyze()
[linux/fpc-iii.git] / drivers / net / ethernet / myricom / myri10ge / myri10ge.c
blob6d1a956e3f779d57e83a8fd40a5136919231df2c
1 /*************************************************************************
2 * myri10ge.c: Myricom Myri-10G Ethernet driver.
3 *
4 * Copyright (C) 2005 - 2011 Myricom, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of Myricom, Inc. nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 *
31 *
32 * If the eeprom on your board is not recent enough, you will need to get a
33 * newer firmware image at:
34 * http://www.myri.com/scs/download-Myri10GE.html
35 *
36 * Contact Information:
37 * <help@myri.com>
38 * Myricom, Inc., 325N Santa Anita Avenue, Arcadia, CA 91006
39 *************************************************************************/
40
41 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
42
43 #include <linux/tcp.h>
44 #include <linux/netdevice.h>
45 #include <linux/skbuff.h>
46 #include <linux/string.h>
47 #include <linux/module.h>
48 #include <linux/pci.h>
49 #include <linux/dma-mapping.h>
50 #include <linux/etherdevice.h>
51 #include <linux/if_ether.h>
52 #include <linux/if_vlan.h>
53 #include <linux/dca.h>
54 #include <linux/ip.h>
55 #include <linux/inet.h>
56 #include <linux/in.h>
57 #include <linux/ethtool.h>
58 #include <linux/firmware.h>
59 #include <linux/delay.h>
60 #include <linux/timer.h>
61 #include <linux/vmalloc.h>
62 #include <linux/crc32.h>
63 #include <linux/moduleparam.h>
64 #include <linux/io.h>
65 #include <linux/log2.h>
66 #include <linux/slab.h>
67 #include <linux/prefetch.h>
68 #include <net/checksum.h>
69 #include <net/ip.h>
70 #include <net/tcp.h>
71 #include <asm/byteorder.h>
72 #include <asm/processor.h>
73 #include <net/busy_poll.h>
74
75 #include "myri10ge_mcp.h"
76 #include "myri10ge_mcp_gen_header.h"
77
78 #define MYRI10GE_VERSION_STR "1.5.3-1.534"
79
80 MODULE_DESCRIPTION("Myricom 10G driver (10GbE)");
81 MODULE_AUTHOR("Maintainer: help@myri.com");
82 MODULE_VERSION(MYRI10GE_VERSION_STR);
83 MODULE_LICENSE("Dual BSD/GPL");
84
85 #define MYRI10GE_MAX_ETHER_MTU 9014
86
87 #define MYRI10GE_ETH_STOPPED 0
88 #define MYRI10GE_ETH_STOPPING 1
89 #define MYRI10GE_ETH_STARTING 2
90 #define MYRI10GE_ETH_RUNNING 3
91 #define MYRI10GE_ETH_OPEN_FAILED 4
92
93 #define MYRI10GE_EEPROM_STRINGS_SIZE 256
94 #define MYRI10GE_MAX_SEND_DESC_TSO ((65536 / 2048) * 2)
95
96 #define MYRI10GE_NO_CONFIRM_DATA htonl(0xffffffff)
97 #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff
98
99 #define MYRI10GE_ALLOC_ORDER 0
100 #define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE)
101 #define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1)
102
103 #define MYRI10GE_MAX_SLICES 32
104
105 struct myri10ge_rx_buffer_state {
106 struct page *page;
107 int page_offset;
108 DEFINE_DMA_UNMAP_ADDR(bus);
109 DEFINE_DMA_UNMAP_LEN(len);
110 };
111
112 struct myri10ge_tx_buffer_state {
113 struct sk_buff *skb;
114 int last;
115 DEFINE_DMA_UNMAP_ADDR(bus);
116 DEFINE_DMA_UNMAP_LEN(len);
117 };
118
119 struct myri10ge_cmd {
120 u32 data0;
121 u32 data1;
122 u32 data2;
123 };
124
125 struct myri10ge_rx_buf {
126 struct mcp_kreq_ether_recv __iomem *lanai; /* lanai ptr for recv ring */
127 struct mcp_kreq_ether_recv *shadow; /* host shadow of recv ring */
128 struct myri10ge_rx_buffer_state *info;
129 struct page *page;
130 dma_addr_t bus;
131 int page_offset;
132 int cnt;
133 int fill_cnt;
134 int alloc_fail;
135 int mask; /* number of rx slots -1 */
136 int watchdog_needed;
137 };
138
139 struct myri10ge_tx_buf {
140 struct mcp_kreq_ether_send __iomem *lanai; /* lanai ptr for sendq */
141 __be32 __iomem *send_go; /* "go" doorbell ptr */
142 __be32 __iomem *send_stop; /* "stop" doorbell ptr */
143 struct mcp_kreq_ether_send *req_list; /* host shadow of sendq */
144 char *req_bytes;
145 struct myri10ge_tx_buffer_state *info;
146 int mask; /* number of transmit slots -1 */
147 int req ____cacheline_aligned; /* transmit slots submitted */
148 int pkt_start; /* packets started */
149 int stop_queue;
150 int linearized;
151 int done ____cacheline_aligned; /* transmit slots completed */
152 int pkt_done; /* packets completed */
153 int wake_queue;
154 int queue_active;
155 };
156
157 struct myri10ge_rx_done {
158 struct mcp_slot *entry;
159 dma_addr_t bus;
160 int cnt;
161 int idx;
162 };
163
164 struct myri10ge_slice_netstats {
165 unsigned long rx_packets;
166 unsigned long tx_packets;
167 unsigned long rx_bytes;
168 unsigned long tx_bytes;
169 unsigned long rx_dropped;
170 unsigned long tx_dropped;
171 };
172
173 struct myri10ge_slice_state {
174 struct myri10ge_tx_buf tx; /* transmit ring */
175 struct myri10ge_rx_buf rx_small;
176 struct myri10ge_rx_buf rx_big;
177 struct myri10ge_rx_done rx_done;
178 struct net_device *dev;
179 struct napi_struct napi;
180 struct myri10ge_priv *mgp;
181 struct myri10ge_slice_netstats stats;
182 __be32 __iomem *irq_claim;
183 struct mcp_irq_data *fw_stats;
184 dma_addr_t fw_stats_bus;
185 int watchdog_tx_done;
186 int watchdog_tx_req;
187 int watchdog_rx_done;
188 int stuck;
189 #ifdef CONFIG_MYRI10GE_DCA
190 int cached_dca_tag;
191 int cpu;
192 __be32 __iomem *dca_tag;
193 #endif
194 #ifdef CONFIG_NET_RX_BUSY_POLL
195 unsigned int state;
196 #define SLICE_STATE_IDLE 0
197 #define SLICE_STATE_NAPI 1 /* NAPI owns this slice */
198 #define SLICE_STATE_POLL 2 /* poll owns this slice */
199 #define SLICE_LOCKED (SLICE_STATE_NAPI | SLICE_STATE_POLL)
200 #define SLICE_STATE_NAPI_YIELD 4 /* NAPI yielded this slice */
201 #define SLICE_STATE_POLL_YIELD 8 /* poll yielded this slice */
202 #define SLICE_USER_PEND (SLICE_STATE_POLL | SLICE_STATE_POLL_YIELD)
203 spinlock_t lock;
204 unsigned long lock_napi_yield;
205 unsigned long lock_poll_yield;
206 unsigned long busy_poll_miss;
207 unsigned long busy_poll_cnt;
208 #endif /* CONFIG_NET_RX_BUSY_POLL */
209 char irq_desc[32];
210 };
211
212 struct myri10ge_priv {
213 struct myri10ge_slice_state *ss;
214 int tx_boundary; /* boundary transmits cannot cross */
215 int num_slices;
216 int running; /* running? */
217 int small_bytes;
218 int big_bytes;
219 int max_intr_slots;
220 struct net_device *dev;
221 u8 __iomem *sram;
222 int sram_size;
223 unsigned long board_span;
224 unsigned long iomem_base;
225 __be32 __iomem *irq_deassert;
226 char *mac_addr_string;
227 struct mcp_cmd_response *cmd;
228 dma_addr_t cmd_bus;
229 struct pci_dev *pdev;
230 int msi_enabled;
231 int msix_enabled;
232 struct msix_entry *msix_vectors;
233 #ifdef CONFIG_MYRI10GE_DCA
234 int dca_enabled;
235 int relaxed_order;
236 #endif
237 u32 link_state;
238 unsigned int rdma_tags_available;
239 int intr_coal_delay;
240 __be32 __iomem *intr_coal_delay_ptr;
241 int wc_cookie;
242 int down_cnt;
243 wait_queue_head_t down_wq;
244 struct work_struct watchdog_work;
245 struct timer_list watchdog_timer;
246 int watchdog_resets;
247 int watchdog_pause;
248 int pause;
249 bool fw_name_allocated;
250 char *fw_name;
251 char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
252 char *product_code_string;
253 char fw_version[128];
254 int fw_ver_major;
255 int fw_ver_minor;
256 int fw_ver_tiny;
257 int adopted_rx_filter_bug;
258 u8 mac_addr[ETH_ALEN]; /* eeprom mac address */
259 unsigned long serial_number;
260 int vendor_specific_offset;
261 int fw_multicast_support;
262 u32 features;
263 u32 max_tso6;
264 u32 read_dma;
265 u32 write_dma;
266 u32 read_write_dma;
267 u32 link_changes;
268 u32 msg_enable;
269 unsigned int board_number;
270 int rebooted;
271 };
272
273 static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
274 static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
275 static char *myri10ge_fw_rss_unaligned = "myri10ge_rss_ethp_z8e.dat";
276 static char *myri10ge_fw_rss_aligned = "myri10ge_rss_eth_z8e.dat";
277 MODULE_FIRMWARE("myri10ge_ethp_z8e.dat");
278 MODULE_FIRMWARE("myri10ge_eth_z8e.dat");
279 MODULE_FIRMWARE("myri10ge_rss_ethp_z8e.dat");
280 MODULE_FIRMWARE("myri10ge_rss_eth_z8e.dat");
281
282 /* Careful: must be accessed under kernel_param_lock() */
283 static char *myri10ge_fw_name = NULL;
284 module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR);
285 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name");
286
287 #define MYRI10GE_MAX_BOARDS 8
288 static char *myri10ge_fw_names[MYRI10GE_MAX_BOARDS] =
289 {[0 ... (MYRI10GE_MAX_BOARDS - 1)] = NULL };
290 module_param_array_named(myri10ge_fw_names, myri10ge_fw_names, charp, NULL,
291 0444);
292 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image names per board");
293
294 static int myri10ge_ecrc_enable = 1;
295 module_param(myri10ge_ecrc_enable, int, S_IRUGO);
296 MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E");
297
298 static int myri10ge_small_bytes = -1; /* -1 == auto */
299 module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR);
300 MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets");
301
302 static int myri10ge_msi = 1; /* enable msi by default */
303 module_param(myri10ge_msi, int, S_IRUGO | S_IWUSR);
304 MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts");
305
306 static int myri10ge_intr_coal_delay = 75;
307 module_param(myri10ge_intr_coal_delay, int, S_IRUGO);
308 MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay");
309
310 static int myri10ge_flow_control = 1;
311 module_param(myri10ge_flow_control, int, S_IRUGO);
312 MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter");
313
314 static int myri10ge_deassert_wait = 1;
315 module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR);
316 MODULE_PARM_DESC(myri10ge_deassert_wait,
317 "Wait when deasserting legacy interrupts");
318
319 static int myri10ge_force_firmware = 0;
320 module_param(myri10ge_force_firmware, int, S_IRUGO);
321 MODULE_PARM_DESC(myri10ge_force_firmware,
322 "Force firmware to assume aligned completions");
323
324 static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
325 module_param(myri10ge_initial_mtu, int, S_IRUGO);
326 MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU");
327
328 static int myri10ge_napi_weight = 64;
329 module_param(myri10ge_napi_weight, int, S_IRUGO);
330 MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight");
331
332 static int myri10ge_watchdog_timeout = 1;
333 module_param(myri10ge_watchdog_timeout, int, S_IRUGO);
334 MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout");
335
336 static int myri10ge_max_irq_loops = 1048576;
337 module_param(myri10ge_max_irq_loops, int, S_IRUGO);
338 MODULE_PARM_DESC(myri10ge_max_irq_loops,
339 "Set stuck legacy IRQ detection threshold");
340
341 #define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK
342
343 static int myri10ge_debug = -1; /* defaults above */
344 module_param(myri10ge_debug, int, 0);
345 MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)");
346
347 static int myri10ge_fill_thresh = 256;
348 module_param(myri10ge_fill_thresh, int, S_IRUGO | S_IWUSR);
349 MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed");
350
351 static int myri10ge_reset_recover = 1;
352
353 static int myri10ge_max_slices = 1;
354 module_param(myri10ge_max_slices, int, S_IRUGO);
355 MODULE_PARM_DESC(myri10ge_max_slices, "Max tx/rx queues");
356
357 static int myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_DST_PORT;
358 module_param(myri10ge_rss_hash, int, S_IRUGO);
359 MODULE_PARM_DESC(myri10ge_rss_hash, "Type of RSS hashing to do");
360
361 static int myri10ge_dca = 1;
362 module_param(myri10ge_dca, int, S_IRUGO);
363 MODULE_PARM_DESC(myri10ge_dca, "Enable DCA if possible");
364
365 #define MYRI10GE_FW_OFFSET 1024*1024
366 #define MYRI10GE_HIGHPART_TO_U32(X) \
367 (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0)
368 #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X))
369
370 #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8)
371
372 static void myri10ge_set_multicast_list(struct net_device *dev);
373 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
374 struct net_device *dev);
375
376 static inline void put_be32(__be32 val, __be32 __iomem * p)
377 {
378 __raw_writel((__force __u32) val, (__force void __iomem *)p);
379 }
380
381 static struct rtnl_link_stats64 *myri10ge_get_stats(struct net_device *dev,
382 struct rtnl_link_stats64 *stats);
383
384 static void set_fw_name(struct myri10ge_priv *mgp, char *name, bool allocated)
385 {
386 if (mgp->fw_name_allocated)
387 kfree(mgp->fw_name);
388 mgp->fw_name = name;
389 mgp->fw_name_allocated = allocated;
390 }
391
392 static int
393 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
394 struct myri10ge_cmd *data, int atomic)
395 {
396 struct mcp_cmd *buf;
397 char buf_bytes[sizeof(*buf) + 8];
398 struct mcp_cmd_response *response = mgp->cmd;
399 char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD;
400 u32 dma_low, dma_high, result, value;
401 int sleep_total = 0;
402
403 /* ensure buf is aligned to 8 bytes */
404 buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8);
405
406 buf->data0 = htonl(data->data0);
407 buf->data1 = htonl(data->data1);
408 buf->data2 = htonl(data->data2);
409 buf->cmd = htonl(cmd);
410 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
411 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
412
413 buf->response_addr.low = htonl(dma_low);
414 buf->response_addr.high = htonl(dma_high);
415 response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT);
416 mb();
417 myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf));
418
419 /* wait up to 15ms. Longest command is the DMA benchmark,
420 * which is capped at 5ms, but runs from a timeout handler
421 * that runs every 7.8ms. So a 15ms timeout leaves us with
422 * a 2.2ms margin
423 */
424 if (atomic) {
425 /* if atomic is set, do not sleep,
426 * and try to get the completion quickly
427 * (1ms will be enough for those commands) */
428 for (sleep_total = 0;
429 sleep_total < 1000 &&
430 response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
431 sleep_total += 10) {
432 udelay(10);
433 mb();
434 }
435 } else {
436 /* use msleep for most command */
437 for (sleep_total = 0;
438 sleep_total < 15 &&
439 response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
440 sleep_total++)
441 msleep(1);
442 }
443
444 result = ntohl(response->result);
445 value = ntohl(response->data);
446 if (result != MYRI10GE_NO_RESPONSE_RESULT) {
447 if (result == 0) {
448 data->data0 = value;
449 return 0;
450 } else if (result == MXGEFW_CMD_UNKNOWN) {
451 return -ENOSYS;
452 } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) {
453 return -E2BIG;
454 } else if (result == MXGEFW_CMD_ERROR_RANGE &&
455 cmd == MXGEFW_CMD_ENABLE_RSS_QUEUES &&
456 (data->
457 data1 & MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES) !=
458 0) {
459 return -ERANGE;
460 } else {
461 dev_err(&mgp->pdev->dev,
462 "command %d failed, result = %d\n",
463 cmd, result);
464 return -ENXIO;
465 }
466 }
467
468 dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
469 cmd, result);
470 return -EAGAIN;
471 }
472
473 /*
474 * The eeprom strings on the lanaiX have the format
475 * SN=x\0
476 * MAC=x:x:x:x:x:x\0
477 * PT:ddd mmm xx xx:xx:xx xx\0
478 * PV:ddd mmm xx xx:xx:xx xx\0
479 */
480 static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp)
481 {
482 char *ptr, *limit;
483 int i;
484
485 ptr = mgp->eeprom_strings;
486 limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE;
487
488 while (*ptr != '\0' && ptr < limit) {
489 if (memcmp(ptr, "MAC=", 4) == 0) {
490 ptr += 4;
491 mgp->mac_addr_string = ptr;
492 for (i = 0; i < 6; i++) {
493 if ((ptr + 2) > limit)
494 goto abort;
495 mgp->mac_addr[i] =
496 simple_strtoul(ptr, &ptr, 16);
497 ptr += 1;
498 }
499 }
500 if (memcmp(ptr, "PC=", 3) == 0) {
501 ptr += 3;
502 mgp->product_code_string = ptr;
503 }
504 if (memcmp((const void *)ptr, "SN=", 3) == 0) {
505 ptr += 3;
506 mgp->serial_number = simple_strtoul(ptr, &ptr, 10);
507 }
508 while (ptr < limit && *ptr++) ;
509 }
510
511 return 0;
512
513 abort:
514 dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n");
515 return -ENXIO;
516 }
517
518 /*
519 * Enable or disable periodic RDMAs from the host to make certain
520 * chipsets resend dropped PCIe messages
521 */
522
523 static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable)
524 {
525 char __iomem *submit;
526 __be32 buf[16] __attribute__ ((__aligned__(8)));
527 u32 dma_low, dma_high;
528 int i;
529
530 /* clear confirmation addr */
531 mgp->cmd->data = 0;
532 mb();
533
534 /* send a rdma command to the PCIe engine, and wait for the
535 * response in the confirmation address. The firmware should
536 * write a -1 there to indicate it is alive and well
537 */
538 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
539 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
540
541 buf[0] = htonl(dma_high); /* confirm addr MSW */
542 buf[1] = htonl(dma_low); /* confirm addr LSW */
543 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */
544 buf[3] = htonl(dma_high); /* dummy addr MSW */
545 buf[4] = htonl(dma_low); /* dummy addr LSW */
546 buf[5] = htonl(enable); /* enable? */
547
548 submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA;
549
550 myri10ge_pio_copy(submit, &buf, sizeof(buf));
551 for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++)
552 msleep(1);
553 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA)
554 dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n",
555 (enable ? "enable" : "disable"));
556 }
557
558 static int
559 myri10ge_validate_firmware(struct myri10ge_priv *mgp,
560 struct mcp_gen_header *hdr)
561 {
562 struct device *dev = &mgp->pdev->dev;
563
564 /* check firmware type */
565 if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) {
566 dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type));
567 return -EINVAL;
568 }
569
570 /* save firmware version for ethtool */
571 strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
572 mgp->fw_version[sizeof(mgp->fw_version) - 1] = '\0';
573
574 sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major,
575 &mgp->fw_ver_minor, &mgp->fw_ver_tiny);
576
577 if (!(mgp->fw_ver_major == MXGEFW_VERSION_MAJOR &&
578 mgp->fw_ver_minor == MXGEFW_VERSION_MINOR)) {
579 dev_err(dev, "Found firmware version %s\n", mgp->fw_version);
580 dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR,
581 MXGEFW_VERSION_MINOR);
582 return -EINVAL;
583 }
584 return 0;
585 }
586
587 static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
588 {
589 unsigned crc, reread_crc;
590 const struct firmware *fw;
591 struct device *dev = &mgp->pdev->dev;
592 unsigned char *fw_readback;
593 struct mcp_gen_header *hdr;
594 size_t hdr_offset;
595 int status;
596 unsigned i;
597
598 if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) {
599 dev_err(dev, "Unable to load %s firmware image via hotplug\n",
600 mgp->fw_name);
601 status = -EINVAL;
602 goto abort_with_nothing;
603 }
604
605 /* check size */
606
607 if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET ||
608 fw->size < MCP_HEADER_PTR_OFFSET + 4) {
609 dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size);
610 status = -EINVAL;
611 goto abort_with_fw;
612 }
613
614 /* check id */
615 hdr_offset = ntohl(*(__be32 *) (fw->data + MCP_HEADER_PTR_OFFSET));
616 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) {
617 dev_err(dev, "Bad firmware file\n");
618 status = -EINVAL;
619 goto abort_with_fw;
620 }
621 hdr = (void *)(fw->data + hdr_offset);
622
623 status = myri10ge_validate_firmware(mgp, hdr);
624 if (status != 0)
625 goto abort_with_fw;
626
627 crc = crc32(~0, fw->data, fw->size);
628 for (i = 0; i < fw->size; i += 256) {
629 myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i,
630 fw->data + i,
631 min(256U, (unsigned)(fw->size - i)));
632 mb();
633 readb(mgp->sram);
634 }
635 fw_readback = vmalloc(fw->size);
636 if (!fw_readback) {
637 status = -ENOMEM;
638 goto abort_with_fw;
639 }
640 /* corruption checking is good for parity recovery and buggy chipset */
641 memcpy_fromio(fw_readback, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);
642 reread_crc = crc32(~0, fw_readback, fw->size);
643 vfree(fw_readback);
644 if (crc != reread_crc) {
645 dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n",
646 (unsigned)fw->size, reread_crc, crc);
647 status = -EIO;
648 goto abort_with_fw;
649 }
650 *size = (u32) fw->size;
651
652 abort_with_fw:
653 release_firmware(fw);
654
655 abort_with_nothing:
656 return status;
657 }
658
659 static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp)
660 {
661 struct mcp_gen_header *hdr;
662 struct device *dev = &mgp->pdev->dev;
663 const size_t bytes = sizeof(struct mcp_gen_header);
664 size_t hdr_offset;
665 int status;
666
667 /* find running firmware header */
668 hdr_offset = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
669
670 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) {
671 dev_err(dev, "Running firmware has bad header offset (%d)\n",
672 (int)hdr_offset);
673 return -EIO;
674 }
675
676 /* copy header of running firmware from SRAM to host memory to
677 * validate firmware */
678 hdr = kmalloc(bytes, GFP_KERNEL);
679 if (hdr == NULL)
680 return -ENOMEM;
681
682 memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes);
683 status = myri10ge_validate_firmware(mgp, hdr);
684 kfree(hdr);
685
686 /* check to see if adopted firmware has bug where adopting
687 * it will cause broadcasts to be filtered unless the NIC
688 * is kept in ALLMULTI mode */
689 if (mgp->fw_ver_major == 1 && mgp->fw_ver_minor == 4 &&
690 mgp->fw_ver_tiny >= 4 && mgp->fw_ver_tiny <= 11) {
691 mgp->adopted_rx_filter_bug = 1;
692 dev_warn(dev, "Adopting fw %d.%d.%d: "
693 "working around rx filter bug\n",
694 mgp->fw_ver_major, mgp->fw_ver_minor,
695 mgp->fw_ver_tiny);
696 }
697 return status;
698 }
699
700 static int myri10ge_get_firmware_capabilities(struct myri10ge_priv *mgp)
701 {
702 struct myri10ge_cmd cmd;
703 int status;
704
705 /* probe for IPv6 TSO support */
706 mgp->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
707 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_TSO6_HDR_SIZE,
708 &cmd, 0);
709 if (status == 0) {
710 mgp->max_tso6 = cmd.data0;
711 mgp->features |= NETIF_F_TSO6;
712 }
713
714 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
715 if (status != 0) {
716 dev_err(&mgp->pdev->dev,
717 "failed MXGEFW_CMD_GET_RX_RING_SIZE\n");
718 return -ENXIO;
719 }
720
721 mgp->max_intr_slots = 2 * (cmd.data0 / sizeof(struct mcp_dma_addr));
722
723 return 0;
724 }
725
726 static int myri10ge_load_firmware(struct myri10ge_priv *mgp, int adopt)
727 {
728 char __iomem *submit;
729 __be32 buf[16] __attribute__ ((__aligned__(8)));
730 u32 dma_low, dma_high, size;
731 int status, i;
732
733 size = 0;
734 status = myri10ge_load_hotplug_firmware(mgp, &size);
735 if (status) {
736 if (!adopt)
737 return status;
738 dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n");
739
740 /* Do not attempt to adopt firmware if there
741 * was a bad crc */
742 if (status == -EIO)
743 return status;
744
745 status = myri10ge_adopt_running_firmware(mgp);
746 if (status != 0) {
747 dev_err(&mgp->pdev->dev,
748 "failed to adopt running firmware\n");
749 return status;
750 }
751 dev_info(&mgp->pdev->dev,
752 "Successfully adopted running firmware\n");
753 if (mgp->tx_boundary == 4096) {
754 dev_warn(&mgp->pdev->dev,
755 "Using firmware currently running on NIC"
756 ". For optimal\n");
757 dev_warn(&mgp->pdev->dev,
758 "performance consider loading optimized "
759 "firmware\n");
760 dev_warn(&mgp->pdev->dev, "via hotplug\n");
761 }
762
763 set_fw_name(mgp, "adopted", false);
764 mgp->tx_boundary = 2048;
765 myri10ge_dummy_rdma(mgp, 1);
766 status = myri10ge_get_firmware_capabilities(mgp);
767 return status;
768 }
769
770 /* clear confirmation addr */
771 mgp->cmd->data = 0;
772 mb();
773
774 /* send a reload command to the bootstrap MCP, and wait for the
775 * response in the confirmation address. The firmware should
776 * write a -1 there to indicate it is alive and well
777 */
778 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
779 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
780
781 buf[0] = htonl(dma_high); /* confirm addr MSW */
782 buf[1] = htonl(dma_low); /* confirm addr LSW */
783 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */
784
785 /* FIX: All newest firmware should un-protect the bottom of
786 * the sram before handoff. However, the very first interfaces
787 * do not. Therefore the handoff copy must skip the first 8 bytes
788 */
789 buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */
790 buf[4] = htonl(size - 8); /* length of code */
791 buf[5] = htonl(8); /* where to copy to */
792 buf[6] = htonl(0); /* where to jump to */
793
794 submit = mgp->sram + MXGEFW_BOOT_HANDOFF;
795
796 myri10ge_pio_copy(submit, &buf, sizeof(buf));
797 mb();
798 msleep(1);
799 mb();
800 i = 0;
801 while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 9) {
802 msleep(1 << i);
803 i++;
804 }
805 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) {
806 dev_err(&mgp->pdev->dev, "handoff failed\n");
807 return -ENXIO;
808 }
809 myri10ge_dummy_rdma(mgp, 1);
810 status = myri10ge_get_firmware_capabilities(mgp);
811
812 return status;
813 }
814
815 static int myri10ge_update_mac_address(struct myri10ge_priv *mgp, u8 * addr)
816 {
817 struct myri10ge_cmd cmd;
818 int status;
819
820 cmd.data0 = ((addr[0] << 24) | (addr[1] << 16)
821 | (addr[2] << 8) | addr[3]);
822
823 cmd.data1 = ((addr[4] << 8) | (addr[5]));
824
825 status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0);
826 return status;
827 }
828
829 static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause)
830 {
831 struct myri10ge_cmd cmd;
832 int status, ctl;
833
834 ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL;
835 status = myri10ge_send_cmd(mgp, ctl, &cmd, 0);
836
837 if (status) {
838 netdev_err(mgp->dev, "Failed to set flow control mode\n");
839 return status;
840 }
841 mgp->pause = pause;
842 return 0;
843 }
844
845 static void
846 myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic)
847 {
848 struct myri10ge_cmd cmd;
849 int status, ctl;
850
851 ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC;
852 status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic);
853 if (status)
854 netdev_err(mgp->dev, "Failed to set promisc mode\n");
855 }
856
857 static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type)
858 {
859 struct myri10ge_cmd cmd;
860 int status;
861 u32 len;
862 struct page *dmatest_page;
863 dma_addr_t dmatest_bus;
864 char *test = " ";
865
866 dmatest_page = alloc_page(GFP_KERNEL);
867 if (!dmatest_page)
868 return -ENOMEM;
869 dmatest_bus = pci_map_page(mgp->pdev, dmatest_page, 0, PAGE_SIZE,
870 DMA_BIDIRECTIONAL);
871 if (unlikely(pci_dma_mapping_error(mgp->pdev, dmatest_bus))) {
872 __free_page(dmatest_page);
873 return -ENOMEM;
874 }
875
876 /* Run a small DMA test.
877 * The magic multipliers to the length tell the firmware
878 * to do DMA read, write, or read+write tests. The
879 * results are returned in cmd.data0. The upper 16
880 * bits or the return is the number of transfers completed.
881 * The lower 16 bits is the time in 0.5us ticks that the
882 * transfers took to complete.
883 */
884
885 len = mgp->tx_boundary;
886
887 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
888 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
889 cmd.data2 = len * 0x10000;
890 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
891 if (status != 0) {
892 test = "read";
893 goto abort;
894 }
895 mgp->read_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
896 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
897 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
898 cmd.data2 = len * 0x1;
899 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
900 if (status != 0) {
901 test = "write";
902 goto abort;
903 }
904 mgp->write_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
905
906 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
907 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
908 cmd.data2 = len * 0x10001;
909 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
910 if (status != 0) {
911 test = "read/write";
912 goto abort;
913 }
914 mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) /
915 (cmd.data0 & 0xffff);
916
917 abort:
918 pci_unmap_page(mgp->pdev, dmatest_bus, PAGE_SIZE, DMA_BIDIRECTIONAL);
919 put_page(dmatest_page);
920
921 if (status != 0 && test_type != MXGEFW_CMD_UNALIGNED_TEST)
922 dev_warn(&mgp->pdev->dev, "DMA %s benchmark failed: %d\n",
923 test, status);
924
925 return status;
926 }
927
928 #ifdef CONFIG_NET_RX_BUSY_POLL
929 static inline void myri10ge_ss_init_lock(struct myri10ge_slice_state *ss)
930 {
931 spin_lock_init(&ss->lock);
932 ss->state = SLICE_STATE_IDLE;
933 }
934
935 static inline bool myri10ge_ss_lock_napi(struct myri10ge_slice_state *ss)
936 {
937 bool rc = true;
938 spin_lock(&ss->lock);
939 if ((ss->state & SLICE_LOCKED)) {
940 WARN_ON((ss->state & SLICE_STATE_NAPI));
941 ss->state |= SLICE_STATE_NAPI_YIELD;
942 rc = false;
943 ss->lock_napi_yield++;
944 } else
945 ss->state = SLICE_STATE_NAPI;
946 spin_unlock(&ss->lock);
947 return rc;
948 }
949
950 static inline void myri10ge_ss_unlock_napi(struct myri10ge_slice_state *ss)
951 {
952 spin_lock(&ss->lock);
953 WARN_ON((ss->state & (SLICE_STATE_POLL | SLICE_STATE_NAPI_YIELD)));
954 ss->state = SLICE_STATE_IDLE;
955 spin_unlock(&ss->lock);
956 }
957
958 static inline bool myri10ge_ss_lock_poll(struct myri10ge_slice_state *ss)
959 {
960 bool rc = true;
961 spin_lock_bh(&ss->lock);
962 if ((ss->state & SLICE_LOCKED)) {
963 ss->state |= SLICE_STATE_POLL_YIELD;
964 rc = false;
965 ss->lock_poll_yield++;
966 } else
967 ss->state |= SLICE_STATE_POLL;
968 spin_unlock_bh(&ss->lock);
969 return rc;
970 }
971
972 static inline void myri10ge_ss_unlock_poll(struct myri10ge_slice_state *ss)
973 {
974 spin_lock_bh(&ss->lock);
975 WARN_ON((ss->state & SLICE_STATE_NAPI));
976 ss->state = SLICE_STATE_IDLE;
977 spin_unlock_bh(&ss->lock);
978 }
979
980 static inline bool myri10ge_ss_busy_polling(struct myri10ge_slice_state *ss)
981 {
982 WARN_ON(!(ss->state & SLICE_LOCKED));
983 return (ss->state & SLICE_USER_PEND);
984 }
985 #else /* CONFIG_NET_RX_BUSY_POLL */
986 static inline void myri10ge_ss_init_lock(struct myri10ge_slice_state *ss)
987 {
988 }
989
990 static inline bool myri10ge_ss_lock_napi(struct myri10ge_slice_state *ss)
991 {
992 return false;
993 }
994
995 static inline void myri10ge_ss_unlock_napi(struct myri10ge_slice_state *ss)
996 {
997 }
998
999 static inline bool myri10ge_ss_lock_poll(struct myri10ge_slice_state *ss)
1000 {
1001 return false;
1002 }
1003
1004 static inline void myri10ge_ss_unlock_poll(struct myri10ge_slice_state *ss)
1005 {
1006 }
1007
1008 static inline bool myri10ge_ss_busy_polling(struct myri10ge_slice_state *ss)
1009 {
1010 return false;
1011 }
1012 #endif
1013
1014 static int myri10ge_reset(struct myri10ge_priv *mgp)
1015 {
1016 struct myri10ge_cmd cmd;
1017 struct myri10ge_slice_state *ss;
1018 int i, status;
1019 size_t bytes;
1020 #ifdef CONFIG_MYRI10GE_DCA
1021 unsigned long dca_tag_off;
1022 #endif
1023
1024 /* try to send a reset command to the card to see if it
1025 * is alive */
1026 memset(&cmd, 0, sizeof(cmd));
1027 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
1028 if (status != 0) {
1029 dev_err(&mgp->pdev->dev, "failed reset\n");
1030 return -ENXIO;
1031 }
1032
1033 (void)myri10ge_dma_test(mgp, MXGEFW_DMA_TEST);
1034 /*
1035 * Use non-ndis mcp_slot (eg, 4 bytes total,
1036 * no toeplitz hash value returned. Older firmware will
1037 * not understand this command, but will use the correct
1038 * sized mcp_slot, so we ignore error returns
1039 */
1040 cmd.data0 = MXGEFW_RSS_MCP_SLOT_TYPE_MIN;
1041 (void)myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_MCP_SLOT_TYPE, &cmd, 0);
1042
1043 /* Now exchange information about interrupts */
1044
1045 bytes = mgp->max_intr_slots * sizeof(*mgp->ss[0].rx_done.entry);
1046 cmd.data0 = (u32) bytes;
1047 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
1048
1049 /*
1050 * Even though we already know how many slices are supported
1051 * via myri10ge_probe_slices() MXGEFW_CMD_GET_MAX_RSS_QUEUES
1052 * has magic side effects, and must be called after a reset.
1053 * It must be called prior to calling any RSS related cmds,
1054 * including assigning an interrupt queue for anything but
1055 * slice 0. It must also be called *after*
1056 * MXGEFW_CMD_SET_INTRQ_SIZE, since the intrq size is used by
1057 * the firmware to compute offsets.
1058 */
1059
1060 if (mgp->num_slices > 1) {
1061
1062 /* ask the maximum number of slices it supports */
1063 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES,
1064 &cmd, 0);
1065 if (status != 0) {
1066 dev_err(&mgp->pdev->dev,
1067 "failed to get number of slices\n");
1068 }
1069
1070 /*
1071 * MXGEFW_CMD_ENABLE_RSS_QUEUES must be called prior
1072 * to setting up the interrupt queue DMA
1073 */
1074
1075 cmd.data0 = mgp->num_slices;
1076 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
1077 if (mgp->dev->real_num_tx_queues > 1)
1078 cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
1079 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
1080 &cmd, 0);
1081
1082 /* Firmware older than 1.4.32 only supports multiple
1083 * RX queues, so if we get an error, first retry using a
1084 * single TX queue before giving up */
1085 if (status != 0 && mgp->dev->real_num_tx_queues > 1) {
1086 netif_set_real_num_tx_queues(mgp->dev, 1);
1087 cmd.data0 = mgp->num_slices;
1088 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
1089 status = myri10ge_send_cmd(mgp,
1090 MXGEFW_CMD_ENABLE_RSS_QUEUES,
1091 &cmd, 0);
1092 }
1093
1094 if (status != 0) {
1095 dev_err(&mgp->pdev->dev,
1096 "failed to set number of slices\n");
1097
1098 return status;
1099 }
1100 }
1101 for (i = 0; i < mgp->num_slices; i++) {
1102 ss = &mgp->ss[i];
1103 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->rx_done.bus);
1104 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->rx_done.bus);
1105 cmd.data2 = i;
1106 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA,
1107 &cmd, 0);
1108 }
1109
1110 status |=
1111 myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0);
1112 for (i = 0; i < mgp->num_slices; i++) {
1113 ss = &mgp->ss[i];
1114 ss->irq_claim =
1115 (__iomem __be32 *) (mgp->sram + cmd.data0 + 8 * i);
1116 }
1117 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET,
1118 &cmd, 0);
1119 mgp->irq_deassert = (__iomem __be32 *) (mgp->sram + cmd.data0);
1120
1121 status |= myri10ge_send_cmd
1122 (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0);
1123 mgp->intr_coal_delay_ptr = (__iomem __be32 *) (mgp->sram + cmd.data0);
1124 if (status != 0) {
1125 dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n");
1126 return status;
1127 }
1128 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1129
1130 #ifdef CONFIG_MYRI10GE_DCA
1131 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_DCA_OFFSET, &cmd, 0);
1132 dca_tag_off = cmd.data0;
1133 for (i = 0; i < mgp->num_slices; i++) {
1134 ss = &mgp->ss[i];
1135 if (status == 0) {
1136 ss->dca_tag = (__iomem __be32 *)
1137 (mgp->sram + dca_tag_off + 4 * i);
1138 } else {
1139 ss->dca_tag = NULL;
1140 }
1141 }
1142 #endif /* CONFIG_MYRI10GE_DCA */
1143
1144 /* reset mcp/driver shared state back to 0 */
1145
1146 mgp->link_changes = 0;
1147 for (i = 0; i < mgp->num_slices; i++) {
1148 ss = &mgp->ss[i];
1149
1150 memset(ss->rx_done.entry, 0, bytes);
1151 ss->tx.req = 0;
1152 ss->tx.done = 0;
1153 ss->tx.pkt_start = 0;
1154 ss->tx.pkt_done = 0;
1155 ss->rx_big.cnt = 0;
1156 ss->rx_small.cnt = 0;
1157 ss->rx_done.idx = 0;
1158 ss->rx_done.cnt = 0;
1159 ss->tx.wake_queue = 0;
1160 ss->tx.stop_queue = 0;
1161 }
1162
1163 status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr);
1164 myri10ge_change_pause(mgp, mgp->pause);
1165 myri10ge_set_multicast_list(mgp->dev);
1166 return status;
1167 }
1168
1169 #ifdef CONFIG_MYRI10GE_DCA
1170 static int myri10ge_toggle_relaxed(struct pci_dev *pdev, int on)
1171 {
1172 int ret;
1173 u16 ctl;
1174
1175 pcie_capability_read_word(pdev, PCI_EXP_DEVCTL, &ctl);
1176
1177 ret = (ctl & PCI_EXP_DEVCTL_RELAX_EN) >> 4;
1178 if (ret != on) {
1179 ctl &= ~PCI_EXP_DEVCTL_RELAX_EN;
1180 ctl |= (on << 4);
1181 pcie_capability_write_word(pdev, PCI_EXP_DEVCTL, ctl);
1182 }
1183 return ret;
1184 }
1185
1186 static void
1187 myri10ge_write_dca(struct myri10ge_slice_state *ss, int cpu, int tag)
1188 {
1189 ss->cached_dca_tag = tag;
1190 put_be32(htonl(tag), ss->dca_tag);
1191 }
1192
1193 static inline void myri10ge_update_dca(struct myri10ge_slice_state *ss)
1194 {
1195 int cpu = get_cpu();
1196 int tag;
1197
1198 if (cpu != ss->cpu) {
1199 tag = dca3_get_tag(&ss->mgp->pdev->dev, cpu);
1200 if (ss->cached_dca_tag != tag)
1201 myri10ge_write_dca(ss, cpu, tag);
1202 ss->cpu = cpu;
1203 }
1204 put_cpu();
1205 }
1206
1207 static void myri10ge_setup_dca(struct myri10ge_priv *mgp)
1208 {
1209 int err, i;
1210 struct pci_dev *pdev = mgp->pdev;
1211
1212 if (mgp->ss[0].dca_tag == NULL || mgp->dca_enabled)
1213 return;
1214 if (!myri10ge_dca) {
1215 dev_err(&pdev->dev, "dca disabled by administrator\n");
1216 return;
1217 }
1218 err = dca_add_requester(&pdev->dev);
1219 if (err) {
1220 if (err != -ENODEV)
1221 dev_err(&pdev->dev,
1222 "dca_add_requester() failed, err=%d\n", err);
1223 return;
1224 }
1225 mgp->relaxed_order = myri10ge_toggle_relaxed(pdev, 0);
1226 mgp->dca_enabled = 1;
1227 for (i = 0; i < mgp->num_slices; i++) {
1228 mgp->ss[i].cpu = -1;
1229 mgp->ss[i].cached_dca_tag = -1;
1230 myri10ge_update_dca(&mgp->ss[i]);
1231 }
1232 }
1233
1234 static void myri10ge_teardown_dca(struct myri10ge_priv *mgp)
1235 {
1236 struct pci_dev *pdev = mgp->pdev;
1237
1238 if (!mgp->dca_enabled)
1239 return;
1240 mgp->dca_enabled = 0;
1241 if (mgp->relaxed_order)
1242 myri10ge_toggle_relaxed(pdev, 1);
1243 dca_remove_requester(&pdev->dev);
1244 }
1245
1246 static int myri10ge_notify_dca_device(struct device *dev, void *data)
1247 {
1248 struct myri10ge_priv *mgp;
1249 unsigned long event;
1250
1251 mgp = dev_get_drvdata(dev);
1252 event = *(unsigned long *)data;
1253
1254 if (event == DCA_PROVIDER_ADD)
1255 myri10ge_setup_dca(mgp);
1256 else if (event == DCA_PROVIDER_REMOVE)
1257 myri10ge_teardown_dca(mgp);
1258 return 0;
1259 }
1260 #endif /* CONFIG_MYRI10GE_DCA */
1261
1262 static inline void
1263 myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst,
1264 struct mcp_kreq_ether_recv *src)
1265 {
1266 __be32 low;
1267
1268 low = src->addr_low;
1269 src->addr_low = htonl(DMA_BIT_MASK(32));
1270 myri10ge_pio_copy(dst, src, 4 * sizeof(*src));
1271 mb();
1272 myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src));
1273 mb();
1274 src->addr_low = low;
1275 put_be32(low, &dst->addr_low);
1276 mb();
1277 }
1278
1279 static inline void myri10ge_vlan_ip_csum(struct sk_buff *skb, __wsum hw_csum)
1280 {
1281 struct vlan_hdr *vh = (struct vlan_hdr *)(skb->data);
1282
1283 if ((skb->protocol == htons(ETH_P_8021Q)) &&
1284 (vh->h_vlan_encapsulated_proto == htons(ETH_P_IP) ||
1285 vh->h_vlan_encapsulated_proto == htons(ETH_P_IPV6))) {
1286 skb->csum = hw_csum;
1287 skb->ip_summed = CHECKSUM_COMPLETE;
1288 }
1289 }
1290
1291 static void
1292 myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
1293 int bytes, int watchdog)
1294 {
1295 struct page *page;
1296 dma_addr_t bus;
1297 int idx;
1298 #if MYRI10GE_ALLOC_SIZE > 4096
1299 int end_offset;
1300 #endif
1301
1302 if (unlikely(rx->watchdog_needed && !watchdog))
1303 return;
1304
1305 /* try to refill entire ring */
1306 while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) {
1307 idx = rx->fill_cnt & rx->mask;
1308 if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) {
1309 /* we can use part of previous page */
1310 get_page(rx->page);
1311 } else {
1312 /* we need a new page */
1313 page =
1314 alloc_pages(GFP_ATOMIC | __GFP_COMP,
1315 MYRI10GE_ALLOC_ORDER);
1316 if (unlikely(page == NULL)) {
1317 if (rx->fill_cnt - rx->cnt < 16)
1318 rx->watchdog_needed = 1;
1319 return;
1320 }
1321
1322 bus = pci_map_page(mgp->pdev, page, 0,
1323 MYRI10GE_ALLOC_SIZE,
1324 PCI_DMA_FROMDEVICE);
1325 if (unlikely(pci_dma_mapping_error(mgp->pdev, bus))) {
1326 __free_pages(page, MYRI10GE_ALLOC_ORDER);
1327 if (rx->fill_cnt - rx->cnt < 16)
1328 rx->watchdog_needed = 1;
1329 return;
1330 }
1331
1332 rx->page = page;
1333 rx->page_offset = 0;
1334 rx->bus = bus;
1335
1336 }
1337 rx->info[idx].page = rx->page;
1338 rx->info[idx].page_offset = rx->page_offset;
1339 /* note that this is the address of the start of the
1340 * page */
1341 dma_unmap_addr_set(&rx->info[idx], bus, rx->bus);
1342 rx->shadow[idx].addr_low =
1343 htonl(MYRI10GE_LOWPART_TO_U32(rx->bus) + rx->page_offset);
1344 rx->shadow[idx].addr_high =
1345 htonl(MYRI10GE_HIGHPART_TO_U32(rx->bus));
1346
1347 /* start next packet on a cacheline boundary */
1348 rx->page_offset += SKB_DATA_ALIGN(bytes);
1349
1350 #if MYRI10GE_ALLOC_SIZE > 4096
1351 /* don't cross a 4KB boundary */
1352 end_offset = rx->page_offset + bytes - 1;
1353 if ((unsigned)(rx->page_offset ^ end_offset) > 4095)
1354 rx->page_offset = end_offset & ~4095;
1355 #endif
1356 rx->fill_cnt++;
1357
1358 /* copy 8 descriptors to the firmware at a time */
1359 if ((idx & 7) == 7) {
1360 myri10ge_submit_8rx(&rx->lanai[idx - 7],
1361 &rx->shadow[idx - 7]);
1362 }
1363 }
1364 }
1365
1366 static inline void
1367 myri10ge_unmap_rx_page(struct pci_dev *pdev,
1368 struct myri10ge_rx_buffer_state *info, int bytes)
1369 {
1370 /* unmap the recvd page if we're the only or last user of it */
1371 if (bytes >= MYRI10GE_ALLOC_SIZE / 2 ||
1372 (info->page_offset + 2 * bytes) > MYRI10GE_ALLOC_SIZE) {
1373 pci_unmap_page(pdev, (dma_unmap_addr(info, bus)
1374 & ~(MYRI10GE_ALLOC_SIZE - 1)),
1375 MYRI10GE_ALLOC_SIZE, PCI_DMA_FROMDEVICE);
1376 }
1377 }
1378
1379 /*
1380 * GRO does not support acceleration of tagged vlan frames, and
1381 * this NIC does not support vlan tag offload, so we must pop
1382 * the tag ourselves to be able to achieve GRO performance that
1383 * is comparable to LRO.
1384 */
1385
1386 static inline void
1387 myri10ge_vlan_rx(struct net_device *dev, void *addr, struct sk_buff *skb)
1388 {
1389 u8 *va;
1390 struct vlan_ethhdr *veh;
1391 struct skb_frag_struct *frag;
1392 __wsum vsum;
1393
1394 va = addr;
1395 va += MXGEFW_PAD;
1396 veh = (struct vlan_ethhdr *)va;
1397 if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) ==
1398 NETIF_F_HW_VLAN_CTAG_RX &&
1399 veh->h_vlan_proto == htons(ETH_P_8021Q)) {
1400 /* fixup csum if needed */
1401 if (skb->ip_summed == CHECKSUM_COMPLETE) {
1402 vsum = csum_partial(va + ETH_HLEN, VLAN_HLEN, 0);
1403 skb->csum = csum_sub(skb->csum, vsum);
1404 }
1405 /* pop tag */
1406 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ntohs(veh->h_vlan_TCI));
1407 memmove(va + VLAN_HLEN, va, 2 * ETH_ALEN);
1408 skb->len -= VLAN_HLEN;
1409 skb->data_len -= VLAN_HLEN;
1410 frag = skb_shinfo(skb)->frags;
1411 frag->page_offset += VLAN_HLEN;
1412 skb_frag_size_set(frag, skb_frag_size(frag) - VLAN_HLEN);
1413 }
1414 }
1415
1416 #define MYRI10GE_HLEN 64 /* Bytes to copy from page to skb linear memory */
1417
1418 static inline int
1419 myri10ge_rx_done(struct myri10ge_slice_state *ss, int len, __wsum csum)
1420 {
1421 struct myri10ge_priv *mgp = ss->mgp;
1422 struct sk_buff *skb;
1423 struct skb_frag_struct *rx_frags;
1424 struct myri10ge_rx_buf *rx;
1425 int i, idx, remainder, bytes;
1426 struct pci_dev *pdev = mgp->pdev;
1427 struct net_device *dev = mgp->dev;
1428 u8 *va;
1429 bool polling;
1430
1431 if (len <= mgp->small_bytes) {
1432 rx = &ss->rx_small;
1433 bytes = mgp->small_bytes;
1434 } else {
1435 rx = &ss->rx_big;
1436 bytes = mgp->big_bytes;
1437 }
1438
1439 len += MXGEFW_PAD;
1440 idx = rx->cnt & rx->mask;
1441 va = page_address(rx->info[idx].page) + rx->info[idx].page_offset;
1442 prefetch(va);
1443
1444 /* When busy polling in user context, allocate skb and copy headers to
1445 * skb's linear memory ourselves. When not busy polling, use the napi
1446 * gro api.
1447 */
1448 polling = myri10ge_ss_busy_polling(ss);
1449 if (polling)
1450 skb = netdev_alloc_skb(dev, MYRI10GE_HLEN + 16);
1451 else
1452 skb = napi_get_frags(&ss->napi);
1453 if (unlikely(skb == NULL)) {
1454 ss->stats.rx_dropped++;
1455 for (i = 0, remainder = len; remainder > 0; i++) {
1456 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1457 put_page(rx->info[idx].page);
1458 rx->cnt++;
1459 idx = rx->cnt & rx->mask;
1460 remainder -= MYRI10GE_ALLOC_SIZE;
1461 }
1462 return 0;
1463 }
1464 rx_frags = skb_shinfo(skb)->frags;
1465 /* Fill skb_frag_struct(s) with data from our receive */
1466 for (i = 0, remainder = len; remainder > 0; i++) {
1467 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1468 skb_fill_page_desc(skb, i, rx->info[idx].page,
1469 rx->info[idx].page_offset,
1470 remainder < MYRI10GE_ALLOC_SIZE ?
1471 remainder : MYRI10GE_ALLOC_SIZE);
1472 rx->cnt++;
1473 idx = rx->cnt & rx->mask;
1474 remainder -= MYRI10GE_ALLOC_SIZE;
1475 }
1476
1477 /* remove padding */
1478 rx_frags[0].page_offset += MXGEFW_PAD;
1479 rx_frags[0].size -= MXGEFW_PAD;
1480 len -= MXGEFW_PAD;
1481
1482 skb->len = len;
1483 skb->data_len = len;
1484 skb->truesize += len;
1485 if (dev->features & NETIF_F_RXCSUM) {
1486 skb->ip_summed = CHECKSUM_COMPLETE;
1487 skb->csum = csum;
1488 }
1489 myri10ge_vlan_rx(mgp->dev, va, skb);
1490 skb_record_rx_queue(skb, ss - &mgp->ss[0]);
1491
1492 if (polling) {
1493 int hlen;
1494
1495 /* myri10ge_vlan_rx might have moved the header, so compute
1496 * length and address again.
1497 */
1498 hlen = MYRI10GE_HLEN > skb->len ? skb->len : MYRI10GE_HLEN;
1499 va = page_address(skb_frag_page(&rx_frags[0])) +
1500 rx_frags[0].page_offset;
1501 /* Copy header into the skb linear memory */
1502 skb_copy_to_linear_data(skb, va, hlen);
1503 rx_frags[0].page_offset += hlen;
1504 rx_frags[0].size -= hlen;
1505 skb->data_len -= hlen;
1506 skb->tail += hlen;
1507 skb->protocol = eth_type_trans(skb, dev);
1508 skb_mark_napi_id(skb, &ss->napi);
1509 netif_receive_skb(skb);
1510 }
1511 else
1512 napi_gro_frags(&ss->napi);
1513
1514 return 1;
1515 }
1516
1517 static inline void
1518 myri10ge_tx_done(struct myri10ge_slice_state *ss, int mcp_index)
1519 {
1520 struct pci_dev *pdev = ss->mgp->pdev;
1521 struct myri10ge_tx_buf *tx = &ss->tx;
1522 struct netdev_queue *dev_queue;
1523 struct sk_buff *skb;
1524 int idx, len;
1525
1526 while (tx->pkt_done != mcp_index) {
1527 idx = tx->done & tx->mask;
1528 skb = tx->info[idx].skb;
1529
1530 /* Mark as free */
1531 tx->info[idx].skb = NULL;
1532 if (tx->info[idx].last) {
1533 tx->pkt_done++;
1534 tx->info[idx].last = 0;
1535 }
1536 tx->done++;
1537 len = dma_unmap_len(&tx->info[idx], len);
1538 dma_unmap_len_set(&tx->info[idx], len, 0);
1539 if (skb) {
1540 ss->stats.tx_bytes += skb->len;
1541 ss->stats.tx_packets++;
1542 dev_kfree_skb_irq(skb);
1543 if (len)
1544 pci_unmap_single(pdev,
1545 dma_unmap_addr(&tx->info[idx],
1546 bus), len,
1547 PCI_DMA_TODEVICE);
1548 } else {
1549 if (len)
1550 pci_unmap_page(pdev,
1551 dma_unmap_addr(&tx->info[idx],
1552 bus), len,
1553 PCI_DMA_TODEVICE);
1554 }
1555 }
1556
1557 dev_queue = netdev_get_tx_queue(ss->dev, ss - ss->mgp->ss);
1558 /*
1559 * Make a minimal effort to prevent the NIC from polling an
1560 * idle tx queue. If we can't get the lock we leave the queue
1561 * active. In this case, either a thread was about to start
1562 * using the queue anyway, or we lost a race and the NIC will
1563 * waste some of its resources polling an inactive queue for a
1564 * while.
1565 */
1566
1567 if ((ss->mgp->dev->real_num_tx_queues > 1) &&
1568 __netif_tx_trylock(dev_queue)) {
1569 if (tx->req == tx->done) {
1570 tx->queue_active = 0;
1571 put_be32(htonl(1), tx->send_stop);
1572 mb();
1573 mmiowb();
1574 }
1575 __netif_tx_unlock(dev_queue);
1576 }
1577
1578 /* start the queue if we've stopped it */
1579 if (netif_tx_queue_stopped(dev_queue) &&
1580 tx->req - tx->done < (tx->mask >> 1) &&
1581 ss->mgp->running == MYRI10GE_ETH_RUNNING) {
1582 tx->wake_queue++;
1583 netif_tx_wake_queue(dev_queue);
1584 }
1585 }
1586
1587 static inline int
1588 myri10ge_clean_rx_done(struct myri10ge_slice_state *ss, int budget)
1589 {
1590 struct myri10ge_rx_done *rx_done = &ss->rx_done;
1591 struct myri10ge_priv *mgp = ss->mgp;
1592 unsigned long rx_bytes = 0;
1593 unsigned long rx_packets = 0;
1594 unsigned long rx_ok;
1595 int idx = rx_done->idx;
1596 int cnt = rx_done->cnt;
1597 int work_done = 0;
1598 u16 length;
1599 __wsum checksum;
1600
1601 while (rx_done->entry[idx].length != 0 && work_done < budget) {
1602 length = ntohs(rx_done->entry[idx].length);
1603 rx_done->entry[idx].length = 0;
1604 checksum = csum_unfold(rx_done->entry[idx].checksum);
1605 rx_ok = myri10ge_rx_done(ss, length, checksum);
1606 rx_packets += rx_ok;
1607 rx_bytes += rx_ok * (unsigned long)length;
1608 cnt++;
1609 idx = cnt & (mgp->max_intr_slots - 1);
1610 work_done++;
1611 }
1612 rx_done->idx = idx;
1613 rx_done->cnt = cnt;
1614 ss->stats.rx_packets += rx_packets;
1615 ss->stats.rx_bytes += rx_bytes;
1616
1617 /* restock receive rings if needed */
1618 if (ss->rx_small.fill_cnt - ss->rx_small.cnt < myri10ge_fill_thresh)
1619 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
1620 mgp->small_bytes + MXGEFW_PAD, 0);
1621 if (ss->rx_big.fill_cnt - ss->rx_big.cnt < myri10ge_fill_thresh)
1622 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
1623
1624 return work_done;
1625 }
1626
1627 static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
1628 {
1629 struct mcp_irq_data *stats = mgp->ss[0].fw_stats;
1630
1631 if (unlikely(stats->stats_updated)) {
1632 unsigned link_up = ntohl(stats->link_up);
1633 if (mgp->link_state != link_up) {
1634 mgp->link_state = link_up;
1635
1636 if (mgp->link_state == MXGEFW_LINK_UP) {
1637 netif_info(mgp, link, mgp->dev, "link up\n");
1638 netif_carrier_on(mgp->dev);
1639 mgp->link_changes++;
1640 } else {
1641 netif_info(mgp, link, mgp->dev, "link %s\n",
1642 (link_up == MXGEFW_LINK_MYRINET ?
1643 "mismatch (Myrinet detected)" :
1644 "down"));
1645 netif_carrier_off(mgp->dev);
1646 mgp->link_changes++;
1647 }
1648 }
1649 if (mgp->rdma_tags_available !=
1650 ntohl(stats->rdma_tags_available)) {
1651 mgp->rdma_tags_available =
1652 ntohl(stats->rdma_tags_available);
1653 netdev_warn(mgp->dev, "RDMA timed out! %d tags left\n",
1654 mgp->rdma_tags_available);
1655 }
1656 mgp->down_cnt += stats->link_down;
1657 if (stats->link_down)
1658 wake_up(&mgp->down_wq);
1659 }
1660 }
1661
1662 static int myri10ge_poll(struct napi_struct *napi, int budget)
1663 {
1664 struct myri10ge_slice_state *ss =
1665 container_of(napi, struct myri10ge_slice_state, napi);
1666 int work_done;
1667
1668 #ifdef CONFIG_MYRI10GE_DCA
1669 if (ss->mgp->dca_enabled)
1670 myri10ge_update_dca(ss);
1671 #endif
1672 /* Try later if the busy_poll handler is running. */
1673 if (!myri10ge_ss_lock_napi(ss))
1674 return budget;
1675
1676 /* process as many rx events as NAPI will allow */
1677 work_done = myri10ge_clean_rx_done(ss, budget);
1678
1679 myri10ge_ss_unlock_napi(ss);
1680 if (work_done < budget) {
1681 napi_complete(napi);
1682 put_be32(htonl(3), ss->irq_claim);
1683 }
1684 return work_done;
1685 }
1686
1687 #ifdef CONFIG_NET_RX_BUSY_POLL
1688 static int myri10ge_busy_poll(struct napi_struct *napi)
1689 {
1690 struct myri10ge_slice_state *ss =
1691 container_of(napi, struct myri10ge_slice_state, napi);
1692 struct myri10ge_priv *mgp = ss->mgp;
1693 int work_done;
1694
1695 /* Poll only when the link is up */
1696 if (mgp->link_state != MXGEFW_LINK_UP)
1697 return LL_FLUSH_FAILED;
1698
1699 if (!myri10ge_ss_lock_poll(ss))
1700 return LL_FLUSH_BUSY;
1701
1702 /* Process a small number of packets */
1703 work_done = myri10ge_clean_rx_done(ss, 4);
1704 if (work_done)
1705 ss->busy_poll_cnt += work_done;
1706 else
1707 ss->busy_poll_miss++;
1708
1709 myri10ge_ss_unlock_poll(ss);
1710
1711 return work_done;
1712 }
1713 #endif /* CONFIG_NET_RX_BUSY_POLL */
1714
1715 static irqreturn_t myri10ge_intr(int irq, void *arg)
1716 {
1717 struct myri10ge_slice_state *ss = arg;
1718 struct myri10ge_priv *mgp = ss->mgp;
1719 struct mcp_irq_data *stats = ss->fw_stats;
1720 struct myri10ge_tx_buf *tx = &ss->tx;
1721 u32 send_done_count;
1722 int i;
1723
1724 /* an interrupt on a non-zero receive-only slice is implicitly
1725 * valid since MSI-X irqs are not shared */
1726 if ((mgp->dev->real_num_tx_queues == 1) && (ss != mgp->ss)) {
1727 napi_schedule(&ss->napi);
1728 return IRQ_HANDLED;
1729 }
1730
1731 /* make sure it is our IRQ, and that the DMA has finished */
1732 if (unlikely(!stats->valid))
1733 return IRQ_NONE;
1734
1735 /* low bit indicates receives are present, so schedule
1736 * napi poll handler */
1737 if (stats->valid & 1)
1738 napi_schedule(&ss->napi);
1739
1740 if (!mgp->msi_enabled && !mgp->msix_enabled) {
1741 put_be32(0, mgp->irq_deassert);
1742 if (!myri10ge_deassert_wait)
1743 stats->valid = 0;
1744 mb();
1745 } else
1746 stats->valid = 0;
1747
1748 /* Wait for IRQ line to go low, if using INTx */
1749 i = 0;
1750 while (1) {
1751 i++;
1752 /* check for transmit completes and receives */
1753 send_done_count = ntohl(stats->send_done_count);
1754 if (send_done_count != tx->pkt_done)
1755 myri10ge_tx_done(ss, (int)send_done_count);
1756 if (unlikely(i > myri10ge_max_irq_loops)) {
1757 netdev_warn(mgp->dev, "irq stuck?\n");
1758 stats->valid = 0;
1759 schedule_work(&mgp->watchdog_work);
1760 }
1761 if (likely(stats->valid == 0))
1762 break;
1763 cpu_relax();
1764 barrier();
1765 }
1766
1767 /* Only slice 0 updates stats */
1768 if (ss == mgp->ss)
1769 myri10ge_check_statblock(mgp);
1770
1771 put_be32(htonl(3), ss->irq_claim + 1);
1772 return IRQ_HANDLED;
1773 }
1774
1775 static int
1776 myri10ge_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
1777 {
1778 struct myri10ge_priv *mgp = netdev_priv(netdev);
1779 char *ptr;
1780 int i;
1781
1782 cmd->autoneg = AUTONEG_DISABLE;
1783 ethtool_cmd_speed_set(cmd, SPEED_10000);
1784 cmd->duplex = DUPLEX_FULL;
1785
1786 /*
1787 * parse the product code to deterimine the interface type
1788 * (CX4, XFP, Quad Ribbon Fiber) by looking at the character
1789 * after the 3rd dash in the driver's cached copy of the
1790 * EEPROM's product code string.
1791 */
1792 ptr = mgp->product_code_string;
1793 if (ptr == NULL) {
1794 netdev_err(netdev, "Missing product code\n");
1795 return 0;
1796 }
1797 for (i = 0; i < 3; i++, ptr++) {
1798 ptr = strchr(ptr, '-');
1799 if (ptr == NULL) {
1800 netdev_err(netdev, "Invalid product code %s\n",
1801 mgp->product_code_string);
1802 return 0;
1803 }
1804 }
1805 if (*ptr == '2')
1806 ptr++;
1807 if (*ptr == 'R' || *ptr == 'Q' || *ptr == 'S') {
1808 /* We've found either an XFP, quad ribbon fiber, or SFP+ */
1809 cmd->port = PORT_FIBRE;
1810 cmd->supported |= SUPPORTED_FIBRE;
1811 cmd->advertising |= ADVERTISED_FIBRE;
1812 } else {
1813 cmd->port = PORT_OTHER;
1814 }
1815 if (*ptr == 'R' || *ptr == 'S')
1816 cmd->transceiver = XCVR_EXTERNAL;
1817 else
1818 cmd->transceiver = XCVR_INTERNAL;
1819
1820 return 0;
1821 }
1822
1823 static void
1824 myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
1825 {
1826 struct myri10ge_priv *mgp = netdev_priv(netdev);
1827
1828 strlcpy(info->driver, "myri10ge", sizeof(info->driver));
1829 strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version));
1830 strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version));
1831 strlcpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info));
1832 }
1833
1834 static int
1835 myri10ge_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1836 {
1837 struct myri10ge_priv *mgp = netdev_priv(netdev);
1838
1839 coal->rx_coalesce_usecs = mgp->intr_coal_delay;
1840 return 0;
1841 }
1842
1843 static int
1844 myri10ge_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1845 {
1846 struct myri10ge_priv *mgp = netdev_priv(netdev);
1847
1848 mgp->intr_coal_delay = coal->rx_coalesce_usecs;
1849 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1850 return 0;
1851 }
1852
1853 static void
1854 myri10ge_get_pauseparam(struct net_device *netdev,
1855 struct ethtool_pauseparam *pause)
1856 {
1857 struct myri10ge_priv *mgp = netdev_priv(netdev);
1858
1859 pause->autoneg = 0;
1860 pause->rx_pause = mgp->pause;
1861 pause->tx_pause = mgp->pause;
1862 }
1863
1864 static int
1865 myri10ge_set_pauseparam(struct net_device *netdev,
1866 struct ethtool_pauseparam *pause)
1867 {
1868 struct myri10ge_priv *mgp = netdev_priv(netdev);
1869
1870 if (pause->tx_pause != mgp->pause)
1871 return myri10ge_change_pause(mgp, pause->tx_pause);
1872 if (pause->rx_pause != mgp->pause)
1873 return myri10ge_change_pause(mgp, pause->rx_pause);
1874 if (pause->autoneg != 0)
1875 return -EINVAL;
1876 return 0;
1877 }
1878
1879 static void
1880 myri10ge_get_ringparam(struct net_device *netdev,
1881 struct ethtool_ringparam *ring)
1882 {
1883 struct myri10ge_priv *mgp = netdev_priv(netdev);
1884
1885 ring->rx_mini_max_pending = mgp->ss[0].rx_small.mask + 1;
1886 ring->rx_max_pending = mgp->ss[0].rx_big.mask + 1;
1887 ring->rx_jumbo_max_pending = 0;
1888 ring->tx_max_pending = mgp->ss[0].tx.mask + 1;
1889 ring->rx_mini_pending = ring->rx_mini_max_pending;
1890 ring->rx_pending = ring->rx_max_pending;
1891 ring->rx_jumbo_pending = ring->rx_jumbo_max_pending;
1892 ring->tx_pending = ring->tx_max_pending;
1893 }
1894
1895 static const char myri10ge_gstrings_main_stats[][ETH_GSTRING_LEN] = {
1896 "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
1897 "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
1898 "rx_length_errors", "rx_over_errors", "rx_crc_errors",
1899 "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
1900 "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
1901 "tx_heartbeat_errors", "tx_window_errors",
1902 /* device-specific stats */
1903 "tx_boundary", "irq", "MSI", "MSIX",
1904 "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
1905 "serial_number", "watchdog_resets",
1906 #ifdef CONFIG_MYRI10GE_DCA
1907 "dca_capable_firmware", "dca_device_present",
1908 #endif
1909 "link_changes", "link_up", "dropped_link_overflow",
1910 "dropped_link_error_or_filtered",
1911 "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32",
1912 "dropped_unicast_filtered", "dropped_multicast_filtered",
1913 "dropped_runt", "dropped_overrun", "dropped_no_small_buffer",
1914 "dropped_no_big_buffer"
1915 };
1916
1917 static const char myri10ge_gstrings_slice_stats[][ETH_GSTRING_LEN] = {
1918 "----------- slice ---------",
1919 "tx_pkt_start", "tx_pkt_done", "tx_req", "tx_done",
1920 "rx_small_cnt", "rx_big_cnt",
1921 "wake_queue", "stop_queue", "tx_linearized",
1922 #ifdef CONFIG_NET_RX_BUSY_POLL
1923 "rx_lock_napi_yield", "rx_lock_poll_yield", "rx_busy_poll_miss",
1924 "rx_busy_poll_cnt",
1925 #endif
1926 };
1927
1928 #define MYRI10GE_NET_STATS_LEN 21
1929 #define MYRI10GE_MAIN_STATS_LEN ARRAY_SIZE(myri10ge_gstrings_main_stats)
1930 #define MYRI10GE_SLICE_STATS_LEN ARRAY_SIZE(myri10ge_gstrings_slice_stats)
1931
1932 static void
1933 myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
1934 {
1935 struct myri10ge_priv *mgp = netdev_priv(netdev);
1936 int i;
1937
1938 switch (stringset) {
1939 case ETH_SS_STATS:
1940 memcpy(data, *myri10ge_gstrings_main_stats,
1941 sizeof(myri10ge_gstrings_main_stats));
1942 data += sizeof(myri10ge_gstrings_main_stats);
1943 for (i = 0; i < mgp->num_slices; i++) {
1944 memcpy(data, *myri10ge_gstrings_slice_stats,
1945 sizeof(myri10ge_gstrings_slice_stats));
1946 data += sizeof(myri10ge_gstrings_slice_stats);
1947 }
1948 break;
1949 }
1950 }
1951
1952 static int myri10ge_get_sset_count(struct net_device *netdev, int sset)
1953 {
1954 struct myri10ge_priv *mgp = netdev_priv(netdev);
1955
1956 switch (sset) {
1957 case ETH_SS_STATS:
1958 return MYRI10GE_MAIN_STATS_LEN +
1959 mgp->num_slices * MYRI10GE_SLICE_STATS_LEN;
1960 default:
1961 return -EOPNOTSUPP;
1962 }
1963 }
1964
1965 static void
1966 myri10ge_get_ethtool_stats(struct net_device *netdev,
1967 struct ethtool_stats *stats, u64 * data)
1968 {
1969 struct myri10ge_priv *mgp = netdev_priv(netdev);
1970 struct myri10ge_slice_state *ss;
1971 struct rtnl_link_stats64 link_stats;
1972 int slice;
1973 int i;
1974
1975 /* force stats update */
1976 memset(&link_stats, 0, sizeof(link_stats));
1977 (void)myri10ge_get_stats(netdev, &link_stats);
1978 for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++)
1979 data[i] = ((u64 *)&link_stats)[i];
1980
1981 data[i++] = (unsigned int)mgp->tx_boundary;
1982 data[i++] = (unsigned int)mgp->pdev->irq;
1983 data[i++] = (unsigned int)mgp->msi_enabled;
1984 data[i++] = (unsigned int)mgp->msix_enabled;
1985 data[i++] = (unsigned int)mgp->read_dma;
1986 data[i++] = (unsigned int)mgp->write_dma;
1987 data[i++] = (unsigned int)mgp->read_write_dma;
1988 data[i++] = (unsigned int)mgp->serial_number;
1989 data[i++] = (unsigned int)mgp->watchdog_resets;
1990 #ifdef CONFIG_MYRI10GE_DCA
1991 data[i++] = (unsigned int)(mgp->ss[0].dca_tag != NULL);
1992 data[i++] = (unsigned int)(mgp->dca_enabled);
1993 #endif
1994 data[i++] = (unsigned int)mgp->link_changes;
1995
1996 /* firmware stats are useful only in the first slice */
1997 ss = &mgp->ss[0];
1998 data[i++] = (unsigned int)ntohl(ss->fw_stats->link_up);
1999 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_link_overflow);
2000 data[i++] =
2001 (unsigned int)ntohl(ss->fw_stats->dropped_link_error_or_filtered);
2002 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_pause);
2003 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_phy);
2004 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_crc32);
2005 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_unicast_filtered);
2006 data[i++] =
2007 (unsigned int)ntohl(ss->fw_stats->dropped_multicast_filtered);
2008 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_runt);
2009 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_overrun);
2010 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_small_buffer);
2011 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_big_buffer);
2012
2013 for (slice = 0; slice < mgp->num_slices; slice++) {
2014 ss = &mgp->ss[slice];
2015 data[i++] = slice;
2016 data[i++] = (unsigned int)ss->tx.pkt_start;
2017 data[i++] = (unsigned int)ss->tx.pkt_done;
2018 data[i++] = (unsigned int)ss->tx.req;
2019 data[i++] = (unsigned int)ss->tx.done;
2020 data[i++] = (unsigned int)ss->rx_small.cnt;
2021 data[i++] = (unsigned int)ss->rx_big.cnt;
2022 data[i++] = (unsigned int)ss->tx.wake_queue;
2023 data[i++] = (unsigned int)ss->tx.stop_queue;
2024 data[i++] = (unsigned int)ss->tx.linearized;
2025 #ifdef CONFIG_NET_RX_BUSY_POLL
2026 data[i++] = ss->lock_napi_yield;
2027 data[i++] = ss->lock_poll_yield;
2028 data[i++] = ss->busy_poll_miss;
2029 data[i++] = ss->busy_poll_cnt;
2030 #endif
2031 }
2032 }
2033
2034 static void myri10ge_set_msglevel(struct net_device *netdev, u32 value)
2035 {
2036 struct myri10ge_priv *mgp = netdev_priv(netdev);
2037 mgp->msg_enable = value;
2038 }
2039
2040 static u32 myri10ge_get_msglevel(struct net_device *netdev)
2041 {
2042 struct myri10ge_priv *mgp = netdev_priv(netdev);
2043 return mgp->msg_enable;
2044 }
2045
2046 /*
2047 * Use a low-level command to change the LED behavior. Rather than
2048 * blinking (which is the normal case), when identify is used, the
2049 * yellow LED turns solid.
2050 */
2051 static int myri10ge_led(struct myri10ge_priv *mgp, int on)
2052 {
2053 struct mcp_gen_header *hdr;
2054 struct device *dev = &mgp->pdev->dev;
2055 size_t hdr_off, pattern_off, hdr_len;
2056 u32 pattern = 0xfffffffe;
2057
2058 /* find running firmware header */
2059 hdr_off = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
2060 if ((hdr_off & 3) || hdr_off + sizeof(*hdr) > mgp->sram_size) {
2061 dev_err(dev, "Running firmware has bad header offset (%d)\n",
2062 (int)hdr_off);
2063 return -EIO;
2064 }
2065 hdr_len = swab32(readl(mgp->sram + hdr_off +
2066 offsetof(struct mcp_gen_header, header_length)));
2067 pattern_off = hdr_off + offsetof(struct mcp_gen_header, led_pattern);
2068 if (pattern_off >= (hdr_len + hdr_off)) {
2069 dev_info(dev, "Firmware does not support LED identification\n");
2070 return -EINVAL;
2071 }
2072 if (!on)
2073 pattern = swab32(readl(mgp->sram + pattern_off + 4));
2074 writel(swab32(pattern), mgp->sram + pattern_off);
2075 return 0;
2076 }
2077
2078 static int
2079 myri10ge_phys_id(struct net_device *netdev, enum ethtool_phys_id_state state)
2080 {
2081 struct myri10ge_priv *mgp = netdev_priv(netdev);
2082 int rc;
2083
2084 switch (state) {
2085 case ETHTOOL_ID_ACTIVE:
2086 rc = myri10ge_led(mgp, 1);
2087 break;
2088
2089 case ETHTOOL_ID_INACTIVE:
2090 rc = myri10ge_led(mgp, 0);
2091 break;
2092
2093 default:
2094 rc = -EINVAL;
2095 }
2096
2097 return rc;
2098 }
2099
2100 static const struct ethtool_ops myri10ge_ethtool_ops = {
2101 .get_settings = myri10ge_get_settings,
2102 .get_drvinfo = myri10ge_get_drvinfo,
2103 .get_coalesce = myri10ge_get_coalesce,
2104 .set_coalesce = myri10ge_set_coalesce,
2105 .get_pauseparam = myri10ge_get_pauseparam,
2106 .set_pauseparam = myri10ge_set_pauseparam,
2107 .get_ringparam = myri10ge_get_ringparam,
2108 .get_link = ethtool_op_get_link,
2109 .get_strings = myri10ge_get_strings,
2110 .get_sset_count = myri10ge_get_sset_count,
2111 .get_ethtool_stats = myri10ge_get_ethtool_stats,
2112 .set_msglevel = myri10ge_set_msglevel,
2113 .get_msglevel = myri10ge_get_msglevel,
2114 .set_phys_id = myri10ge_phys_id,
2115 };
2116
2117 static int myri10ge_allocate_rings(struct myri10ge_slice_state *ss)
2118 {
2119 struct myri10ge_priv *mgp = ss->mgp;
2120 struct myri10ge_cmd cmd;
2121 struct net_device *dev = mgp->dev;
2122 int tx_ring_size, rx_ring_size;
2123 int tx_ring_entries, rx_ring_entries;
2124 int i, slice, status;
2125 size_t bytes;
2126
2127 /* get ring sizes */
2128 slice = ss - mgp->ss;
2129 cmd.data0 = slice;
2130 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0);
2131 tx_ring_size = cmd.data0;
2132 cmd.data0 = slice;
2133 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
2134 if (status != 0)
2135 return status;
2136 rx_ring_size = cmd.data0;
2137
2138 tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send);
2139 rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr);
2140 ss->tx.mask = tx_ring_entries - 1;
2141 ss->rx_small.mask = ss->rx_big.mask = rx_ring_entries - 1;
2142
2143 status = -ENOMEM;
2144
2145 /* allocate the host shadow rings */
2146
2147 bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4)
2148 * sizeof(*ss->tx.req_list);
2149 ss->tx.req_bytes = kzalloc(bytes, GFP_KERNEL);
2150 if (ss->tx.req_bytes == NULL)
2151 goto abort_with_nothing;
2152
2153 /* ensure req_list entries are aligned to 8 bytes */
2154 ss->tx.req_list = (struct mcp_kreq_ether_send *)
2155 ALIGN((unsigned long)ss->tx.req_bytes, 8);
2156 ss->tx.queue_active = 0;
2157
2158 bytes = rx_ring_entries * sizeof(*ss->rx_small.shadow);
2159 ss->rx_small.shadow = kzalloc(bytes, GFP_KERNEL);
2160 if (ss->rx_small.shadow == NULL)
2161 goto abort_with_tx_req_bytes;
2162
2163 bytes = rx_ring_entries * sizeof(*ss->rx_big.shadow);
2164 ss->rx_big.shadow = kzalloc(bytes, GFP_KERNEL);
2165 if (ss->rx_big.shadow == NULL)
2166 goto abort_with_rx_small_shadow;
2167
2168 /* allocate the host info rings */
2169
2170 bytes = tx_ring_entries * sizeof(*ss->tx.info);
2171 ss->tx.info = kzalloc(bytes, GFP_KERNEL);
2172 if (ss->tx.info == NULL)
2173 goto abort_with_rx_big_shadow;
2174
2175 bytes = rx_ring_entries * sizeof(*ss->rx_small.info);
2176 ss->rx_small.info = kzalloc(bytes, GFP_KERNEL);
2177 if (ss->rx_small.info == NULL)
2178 goto abort_with_tx_info;
2179
2180 bytes = rx_ring_entries * sizeof(*ss->rx_big.info);
2181 ss->rx_big.info = kzalloc(bytes, GFP_KERNEL);
2182 if (ss->rx_big.info == NULL)
2183 goto abort_with_rx_small_info;
2184
2185 /* Fill the receive rings */
2186 ss->rx_big.cnt = 0;
2187 ss->rx_small.cnt = 0;
2188 ss->rx_big.fill_cnt = 0;
2189 ss->rx_small.fill_cnt = 0;
2190 ss->rx_small.page_offset = MYRI10GE_ALLOC_SIZE;
2191 ss->rx_big.page_offset = MYRI10GE_ALLOC_SIZE;
2192 ss->rx_small.watchdog_needed = 0;
2193 ss->rx_big.watchdog_needed = 0;
2194 if (mgp->small_bytes == 0) {
2195 ss->rx_small.fill_cnt = ss->rx_small.mask + 1;
2196 } else {
2197 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
2198 mgp->small_bytes + MXGEFW_PAD, 0);
2199 }
2200
2201 if (ss->rx_small.fill_cnt < ss->rx_small.mask + 1) {
2202 netdev_err(dev, "slice-%d: alloced only %d small bufs\n",
2203 slice, ss->rx_small.fill_cnt);
2204 goto abort_with_rx_small_ring;
2205 }
2206
2207 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
2208 if (ss->rx_big.fill_cnt < ss->rx_big.mask + 1) {
2209 netdev_err(dev, "slice-%d: alloced only %d big bufs\n",
2210 slice, ss->rx_big.fill_cnt);
2211 goto abort_with_rx_big_ring;
2212 }
2213
2214 return 0;
2215
2216 abort_with_rx_big_ring:
2217 for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2218 int idx = i & ss->rx_big.mask;
2219 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2220 mgp->big_bytes);
2221 put_page(ss->rx_big.info[idx].page);
2222 }
2223
2224 abort_with_rx_small_ring:
2225 if (mgp->small_bytes == 0)
2226 ss->rx_small.fill_cnt = ss->rx_small.cnt;
2227 for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2228 int idx = i & ss->rx_small.mask;
2229 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2230 mgp->small_bytes + MXGEFW_PAD);
2231 put_page(ss->rx_small.info[idx].page);
2232 }
2233
2234 kfree(ss->rx_big.info);
2235
2236 abort_with_rx_small_info:
2237 kfree(ss->rx_small.info);
2238
2239 abort_with_tx_info:
2240 kfree(ss->tx.info);
2241
2242 abort_with_rx_big_shadow:
2243 kfree(ss->rx_big.shadow);
2244
2245 abort_with_rx_small_shadow:
2246 kfree(ss->rx_small.shadow);
2247
2248 abort_with_tx_req_bytes:
2249 kfree(ss->tx.req_bytes);
2250 ss->tx.req_bytes = NULL;
2251 ss->tx.req_list = NULL;
2252
2253 abort_with_nothing:
2254 return status;
2255 }
2256
2257 static void myri10ge_free_rings(struct myri10ge_slice_state *ss)
2258 {
2259 struct myri10ge_priv *mgp = ss->mgp;
2260 struct sk_buff *skb;
2261 struct myri10ge_tx_buf *tx;
2262 int i, len, idx;
2263
2264 /* If not allocated, skip it */
2265 if (ss->tx.req_list == NULL)
2266 return;
2267
2268 for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2269 idx = i & ss->rx_big.mask;
2270 if (i == ss->rx_big.fill_cnt - 1)
2271 ss->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE;
2272 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2273 mgp->big_bytes);
2274 put_page(ss->rx_big.info[idx].page);
2275 }
2276
2277 if (mgp->small_bytes == 0)
2278 ss->rx_small.fill_cnt = ss->rx_small.cnt;
2279 for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2280 idx = i & ss->rx_small.mask;
2281 if (i == ss->rx_small.fill_cnt - 1)
2282 ss->rx_small.info[idx].page_offset =
2283 MYRI10GE_ALLOC_SIZE;
2284 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2285 mgp->small_bytes + MXGEFW_PAD);
2286 put_page(ss->rx_small.info[idx].page);
2287 }
2288 tx = &ss->tx;
2289 while (tx->done != tx->req) {
2290 idx = tx->done & tx->mask;
2291 skb = tx->info[idx].skb;
2292
2293 /* Mark as free */
2294 tx->info[idx].skb = NULL;
2295 tx->done++;
2296 len = dma_unmap_len(&tx->info[idx], len);
2297 dma_unmap_len_set(&tx->info[idx], len, 0);
2298 if (skb) {
2299 ss->stats.tx_dropped++;
2300 dev_kfree_skb_any(skb);
2301 if (len)
2302 pci_unmap_single(mgp->pdev,
2303 dma_unmap_addr(&tx->info[idx],
2304 bus), len,
2305 PCI_DMA_TODEVICE);
2306 } else {
2307 if (len)
2308 pci_unmap_page(mgp->pdev,
2309 dma_unmap_addr(&tx->info[idx],
2310 bus), len,
2311 PCI_DMA_TODEVICE);
2312 }
2313 }
2314 kfree(ss->rx_big.info);
2315
2316 kfree(ss->rx_small.info);
2317
2318 kfree(ss->tx.info);
2319
2320 kfree(ss->rx_big.shadow);
2321
2322 kfree(ss->rx_small.shadow);
2323
2324 kfree(ss->tx.req_bytes);
2325 ss->tx.req_bytes = NULL;
2326 ss->tx.req_list = NULL;
2327 }
2328
2329 static int myri10ge_request_irq(struct myri10ge_priv *mgp)
2330 {
2331 struct pci_dev *pdev = mgp->pdev;
2332 struct myri10ge_slice_state *ss;
2333 struct net_device *netdev = mgp->dev;
2334 int i;
2335 int status;
2336
2337 mgp->msi_enabled = 0;
2338 mgp->msix_enabled = 0;
2339 status = 0;
2340 if (myri10ge_msi) {
2341 if (mgp->num_slices > 1) {
2342 status = pci_enable_msix_range(pdev, mgp->msix_vectors,
2343 mgp->num_slices, mgp->num_slices);
2344 if (status < 0) {
2345 dev_err(&pdev->dev,
2346 "Error %d setting up MSI-X\n", status);
2347 return status;
2348 }
2349 mgp->msix_enabled = 1;
2350 }
2351 if (mgp->msix_enabled == 0) {
2352 status = pci_enable_msi(pdev);
2353 if (status != 0) {
2354 dev_err(&pdev->dev,
2355 "Error %d setting up MSI; falling back to xPIC\n",
2356 status);
2357 } else {
2358 mgp->msi_enabled = 1;
2359 }
2360 }
2361 }
2362 if (mgp->msix_enabled) {
2363 for (i = 0; i < mgp->num_slices; i++) {
2364 ss = &mgp->ss[i];
2365 snprintf(ss->irq_desc, sizeof(ss->irq_desc),
2366 "%s:slice-%d", netdev->name, i);
2367 status = request_irq(mgp->msix_vectors[i].vector,
2368 myri10ge_intr, 0, ss->irq_desc,
2369 ss);
2370 if (status != 0) {
2371 dev_err(&pdev->dev,
2372 "slice %d failed to allocate IRQ\n", i);
2373 i--;
2374 while (i >= 0) {
2375 free_irq(mgp->msix_vectors[i].vector,
2376 &mgp->ss[i]);
2377 i--;
2378 }
2379 pci_disable_msix(pdev);
2380 return status;
2381 }
2382 }
2383 } else {
2384 status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED,
2385 mgp->dev->name, &mgp->ss[0]);
2386 if (status != 0) {
2387 dev_err(&pdev->dev, "failed to allocate IRQ\n");
2388 if (mgp->msi_enabled)
2389 pci_disable_msi(pdev);
2390 }
2391 }
2392 return status;
2393 }
2394
2395 static void myri10ge_free_irq(struct myri10ge_priv *mgp)
2396 {
2397 struct pci_dev *pdev = mgp->pdev;
2398 int i;
2399
2400 if (mgp->msix_enabled) {
2401 for (i = 0; i < mgp->num_slices; i++)
2402 free_irq(mgp->msix_vectors[i].vector, &mgp->ss[i]);
2403 } else {
2404 free_irq(pdev->irq, &mgp->ss[0]);
2405 }
2406 if (mgp->msi_enabled)
2407 pci_disable_msi(pdev);
2408 if (mgp->msix_enabled)
2409 pci_disable_msix(pdev);
2410 }
2411
2412 static int myri10ge_get_txrx(struct myri10ge_priv *mgp, int slice)
2413 {
2414 struct myri10ge_cmd cmd;
2415 struct myri10ge_slice_state *ss;
2416 int status;
2417
2418 ss = &mgp->ss[slice];
2419 status = 0;
2420 if (slice == 0 || (mgp->dev->real_num_tx_queues > 1)) {
2421 cmd.data0 = slice;
2422 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET,
2423 &cmd, 0);
2424 ss->tx.lanai = (struct mcp_kreq_ether_send __iomem *)
2425 (mgp->sram + cmd.data0);
2426 }
2427 cmd.data0 = slice;
2428 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET,
2429 &cmd, 0);
2430 ss->rx_small.lanai = (struct mcp_kreq_ether_recv __iomem *)
2431 (mgp->sram + cmd.data0);
2432
2433 cmd.data0 = slice;
2434 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0);
2435 ss->rx_big.lanai = (struct mcp_kreq_ether_recv __iomem *)
2436 (mgp->sram + cmd.data0);
2437
2438 ss->tx.send_go = (__iomem __be32 *)
2439 (mgp->sram + MXGEFW_ETH_SEND_GO + 64 * slice);
2440 ss->tx.send_stop = (__iomem __be32 *)
2441 (mgp->sram + MXGEFW_ETH_SEND_STOP + 64 * slice);
2442 return status;
2443
2444 }
2445
2446 static int myri10ge_set_stats(struct myri10ge_priv *mgp, int slice)
2447 {
2448 struct myri10ge_cmd cmd;
2449 struct myri10ge_slice_state *ss;
2450 int status;
2451
2452 ss = &mgp->ss[slice];
2453 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->fw_stats_bus);
2454 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->fw_stats_bus);
2455 cmd.data2 = sizeof(struct mcp_irq_data) | (slice << 16);
2456 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0);
2457 if (status == -ENOSYS) {
2458 dma_addr_t bus = ss->fw_stats_bus;
2459 if (slice != 0)
2460 return -EINVAL;
2461 bus += offsetof(struct mcp_irq_data, send_done_count);
2462 cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus);
2463 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus);
2464 status = myri10ge_send_cmd(mgp,
2465 MXGEFW_CMD_SET_STATS_DMA_OBSOLETE,
2466 &cmd, 0);
2467 /* Firmware cannot support multicast without STATS_DMA_V2 */
2468 mgp->fw_multicast_support = 0;
2469 } else {
2470 mgp->fw_multicast_support = 1;
2471 }
2472 return 0;
2473 }
2474
2475 static int myri10ge_open(struct net_device *dev)
2476 {
2477 struct myri10ge_slice_state *ss;
2478 struct myri10ge_priv *mgp = netdev_priv(dev);
2479 struct myri10ge_cmd cmd;
2480 int i, status, big_pow2, slice;
2481 u8 __iomem *itable;
2482
2483 if (mgp->running != MYRI10GE_ETH_STOPPED)
2484 return -EBUSY;
2485
2486 mgp->running = MYRI10GE_ETH_STARTING;
2487 status = myri10ge_reset(mgp);
2488 if (status != 0) {
2489 netdev_err(dev, "failed reset\n");
2490 goto abort_with_nothing;
2491 }
2492
2493 if (mgp->num_slices > 1) {
2494 cmd.data0 = mgp->num_slices;
2495 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
2496 if (mgp->dev->real_num_tx_queues > 1)
2497 cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
2498 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
2499 &cmd, 0);
2500 if (status != 0) {
2501 netdev_err(dev, "failed to set number of slices\n");
2502 goto abort_with_nothing;
2503 }
2504 /* setup the indirection table */
2505 cmd.data0 = mgp->num_slices;
2506 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_TABLE_SIZE,
2507 &cmd, 0);
2508
2509 status |= myri10ge_send_cmd(mgp,
2510 MXGEFW_CMD_GET_RSS_TABLE_OFFSET,
2511 &cmd, 0);
2512 if (status != 0) {
2513 netdev_err(dev, "failed to setup rss tables\n");
2514 goto abort_with_nothing;
2515 }
2516
2517 /* just enable an identity mapping */
2518 itable = mgp->sram + cmd.data0;
2519 for (i = 0; i < mgp->num_slices; i++)
2520 __raw_writeb(i, &itable[i]);
2521
2522 cmd.data0 = 1;
2523 cmd.data1 = myri10ge_rss_hash;
2524 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_ENABLE,
2525 &cmd, 0);
2526 if (status != 0) {
2527 netdev_err(dev, "failed to enable slices\n");
2528 goto abort_with_nothing;
2529 }
2530 }
2531
2532 status = myri10ge_request_irq(mgp);
2533 if (status != 0)
2534 goto abort_with_nothing;
2535
2536 /* decide what small buffer size to use. For good TCP rx
2537 * performance, it is important to not receive 1514 byte
2538 * frames into jumbo buffers, as it confuses the socket buffer
2539 * accounting code, leading to drops and erratic performance.
2540 */
2541
2542 if (dev->mtu <= ETH_DATA_LEN)
2543 /* enough for a TCP header */
2544 mgp->small_bytes = (128 > SMP_CACHE_BYTES)
2545 ? (128 - MXGEFW_PAD)
2546 : (SMP_CACHE_BYTES - MXGEFW_PAD);
2547 else
2548 /* enough for a vlan encapsulated ETH_DATA_LEN frame */
2549 mgp->small_bytes = VLAN_ETH_FRAME_LEN;
2550
2551 /* Override the small buffer size? */
2552 if (myri10ge_small_bytes >= 0)
2553 mgp->small_bytes = myri10ge_small_bytes;
2554
2555 /* Firmware needs the big buff size as a power of 2. Lie and
2556 * tell him the buffer is larger, because we only use 1
2557 * buffer/pkt, and the mtu will prevent overruns.
2558 */
2559 big_pow2 = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2560 if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) {
2561 while (!is_power_of_2(big_pow2))
2562 big_pow2++;
2563 mgp->big_bytes = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2564 } else {
2565 big_pow2 = MYRI10GE_ALLOC_SIZE;
2566 mgp->big_bytes = big_pow2;
2567 }
2568
2569 /* setup the per-slice data structures */
2570 for (slice = 0; slice < mgp->num_slices; slice++) {
2571 ss = &mgp->ss[slice];
2572
2573 status = myri10ge_get_txrx(mgp, slice);
2574 if (status != 0) {
2575 netdev_err(dev, "failed to get ring sizes or locations\n");
2576 goto abort_with_rings;
2577 }
2578 status = myri10ge_allocate_rings(ss);
2579 if (status != 0)
2580 goto abort_with_rings;
2581
2582 /* only firmware which supports multiple TX queues
2583 * supports setting up the tx stats on non-zero
2584 * slices */
2585 if (slice == 0 || mgp->dev->real_num_tx_queues > 1)
2586 status = myri10ge_set_stats(mgp, slice);
2587 if (status) {
2588 netdev_err(dev, "Couldn't set stats DMA\n");
2589 goto abort_with_rings;
2590 }
2591
2592 /* Initialize the slice spinlock and state used for polling */
2593 myri10ge_ss_init_lock(ss);
2594
2595 /* must happen prior to any irq */
2596 napi_enable(&(ss)->napi);
2597 }
2598
2599 /* now give firmware buffers sizes, and MTU */
2600 cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
2601 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0);
2602 cmd.data0 = mgp->small_bytes;
2603 status |=
2604 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0);
2605 cmd.data0 = big_pow2;
2606 status |=
2607 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0);
2608 if (status) {
2609 netdev_err(dev, "Couldn't set buffer sizes\n");
2610 goto abort_with_rings;
2611 }
2612
2613 /*
2614 * Set Linux style TSO mode; this is needed only on newer
2615 * firmware versions. Older versions default to Linux
2616 * style TSO
2617 */
2618 cmd.data0 = 0;
2619 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_TSO_MODE, &cmd, 0);
2620 if (status && status != -ENOSYS) {
2621 netdev_err(dev, "Couldn't set TSO mode\n");
2622 goto abort_with_rings;
2623 }
2624
2625 mgp->link_state = ~0U;
2626 mgp->rdma_tags_available = 15;
2627
2628 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0);
2629 if (status) {
2630 netdev_err(dev, "Couldn't bring up link\n");
2631 goto abort_with_rings;
2632 }
2633
2634 mgp->running = MYRI10GE_ETH_RUNNING;
2635 mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ;
2636 add_timer(&mgp->watchdog_timer);
2637 netif_tx_wake_all_queues(dev);
2638
2639 return 0;
2640
2641 abort_with_rings:
2642 while (slice) {
2643 slice--;
2644 napi_disable(&mgp->ss[slice].napi);
2645 }
2646 for (i = 0; i < mgp->num_slices; i++)
2647 myri10ge_free_rings(&mgp->ss[i]);
2648
2649 myri10ge_free_irq(mgp);
2650
2651 abort_with_nothing:
2652 mgp->running = MYRI10GE_ETH_STOPPED;
2653 return -ENOMEM;
2654 }
2655
2656 static int myri10ge_close(struct net_device *dev)
2657 {
2658 struct myri10ge_priv *mgp = netdev_priv(dev);
2659 struct myri10ge_cmd cmd;
2660 int status, old_down_cnt;
2661 int i;
2662
2663 if (mgp->running != MYRI10GE_ETH_RUNNING)
2664 return 0;
2665
2666 if (mgp->ss[0].tx.req_bytes == NULL)
2667 return 0;
2668
2669 del_timer_sync(&mgp->watchdog_timer);
2670 mgp->running = MYRI10GE_ETH_STOPPING;
2671 for (i = 0; i < mgp->num_slices; i++) {
2672 napi_disable(&mgp->ss[i].napi);
2673 local_bh_disable(); /* myri10ge_ss_lock_napi needs this */
2674 /* Lock the slice to prevent the busy_poll handler from
2675 * accessing it. Later when we bring the NIC up, myri10ge_open
2676 * resets the slice including this lock.
2677 */
2678 while (!myri10ge_ss_lock_napi(&mgp->ss[i])) {
2679 pr_info("Slice %d locked\n", i);
2680 mdelay(1);
2681 }
2682 local_bh_enable();
2683 }
2684 netif_carrier_off(dev);
2685
2686 netif_tx_stop_all_queues(dev);
2687 if (mgp->rebooted == 0) {
2688 old_down_cnt = mgp->down_cnt;
2689 mb();
2690 status =
2691 myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0);
2692 if (status)
2693 netdev_err(dev, "Couldn't bring down link\n");
2694
2695 wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt,
2696 HZ);
2697 if (old_down_cnt == mgp->down_cnt)
2698 netdev_err(dev, "never got down irq\n");
2699 }
2700 netif_tx_disable(dev);
2701 myri10ge_free_irq(mgp);
2702 for (i = 0; i < mgp->num_slices; i++)
2703 myri10ge_free_rings(&mgp->ss[i]);
2704
2705 mgp->running = MYRI10GE_ETH_STOPPED;
2706 return 0;
2707 }
2708
2709 /* copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
2710 * backwards one at a time and handle ring wraps */
2711
2712 static inline void
2713 myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx,
2714 struct mcp_kreq_ether_send *src, int cnt)
2715 {
2716 int idx, starting_slot;
2717 starting_slot = tx->req;
2718 while (cnt > 1) {
2719 cnt--;
2720 idx = (starting_slot + cnt) & tx->mask;
2721 myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src));
2722 mb();
2723 }
2724 }
2725
2726 /*
2727 * copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
2728 * at most 32 bytes at a time, so as to avoid involving the software
2729 * pio handler in the nic. We re-write the first segment's flags
2730 * to mark them valid only after writing the entire chain.
2731 */
2732
2733 static inline void
2734 myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src,
2735 int cnt)
2736 {
2737 int idx, i;
2738 struct mcp_kreq_ether_send __iomem *dstp, *dst;
2739 struct mcp_kreq_ether_send *srcp;
2740 u8 last_flags;
2741
2742 idx = tx->req & tx->mask;
2743
2744 last_flags = src->flags;
2745 src->flags = 0;
2746 mb();
2747 dst = dstp = &tx->lanai[idx];
2748 srcp = src;
2749
2750 if ((idx + cnt) < tx->mask) {
2751 for (i = 0; i < (cnt - 1); i += 2) {
2752 myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src));
2753 mb(); /* force write every 32 bytes */
2754 srcp += 2;
2755 dstp += 2;
2756 }
2757 } else {
2758 /* submit all but the first request, and ensure
2759 * that it is submitted below */
2760 myri10ge_submit_req_backwards(tx, src, cnt);
2761 i = 0;
2762 }
2763 if (i < cnt) {
2764 /* submit the first request */
2765 myri10ge_pio_copy(dstp, srcp, sizeof(*src));
2766 mb(); /* barrier before setting valid flag */
2767 }
2768
2769 /* re-write the last 32-bits with the valid flags */
2770 src->flags = last_flags;
2771 put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3);
2772 tx->req += cnt;
2773 mb();
2774 }
2775
2776 static void myri10ge_unmap_tx_dma(struct myri10ge_priv *mgp,
2777 struct myri10ge_tx_buf *tx, int idx)
2778 {
2779 unsigned int len;
2780 int last_idx;
2781
2782 /* Free any DMA resources we've alloced and clear out the skb slot */
2783 last_idx = (idx + 1) & tx->mask;
2784 idx = tx->req & tx->mask;
2785 do {
2786 len = dma_unmap_len(&tx->info[idx], len);
2787 if (len) {
2788 if (tx->info[idx].skb != NULL)
2789 pci_unmap_single(mgp->pdev,
2790 dma_unmap_addr(&tx->info[idx],
2791 bus), len,
2792 PCI_DMA_TODEVICE);
2793 else
2794 pci_unmap_page(mgp->pdev,
2795 dma_unmap_addr(&tx->info[idx],
2796 bus), len,
2797 PCI_DMA_TODEVICE);
2798 dma_unmap_len_set(&tx->info[idx], len, 0);
2799 tx->info[idx].skb = NULL;
2800 }
2801 idx = (idx + 1) & tx->mask;
2802 } while (idx != last_idx);
2803 }
2804
2805 /*
2806 * Transmit a packet. We need to split the packet so that a single
2807 * segment does not cross myri10ge->tx_boundary, so this makes segment
2808 * counting tricky. So rather than try to count segments up front, we
2809 * just give up if there are too few segments to hold a reasonably
2810 * fragmented packet currently available. If we run
2811 * out of segments while preparing a packet for DMA, we just linearize
2812 * it and try again.
2813 */
2814
2815 static netdev_tx_t myri10ge_xmit(struct sk_buff *skb,
2816 struct net_device *dev)
2817 {
2818 struct myri10ge_priv *mgp = netdev_priv(dev);
2819 struct myri10ge_slice_state *ss;
2820 struct mcp_kreq_ether_send *req;
2821 struct myri10ge_tx_buf *tx;
2822 struct skb_frag_struct *frag;
2823 struct netdev_queue *netdev_queue;
2824 dma_addr_t bus;
2825 u32 low;
2826 __be32 high_swapped;
2827 unsigned int len;
2828 int idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
2829 u16 pseudo_hdr_offset, cksum_offset, queue;
2830 int cum_len, seglen, boundary, rdma_count;
2831 u8 flags, odd_flag;
2832
2833 queue = skb_get_queue_mapping(skb);
2834 ss = &mgp->ss[queue];
2835 netdev_queue = netdev_get_tx_queue(mgp->dev, queue);
2836 tx = &ss->tx;
2837
2838 again:
2839 req = tx->req_list;
2840 avail = tx->mask - 1 - (tx->req - tx->done);
2841
2842 mss = 0;
2843 max_segments = MXGEFW_MAX_SEND_DESC;
2844
2845 if (skb_is_gso(skb)) {
2846 mss = skb_shinfo(skb)->gso_size;
2847 max_segments = MYRI10GE_MAX_SEND_DESC_TSO;
2848 }
2849
2850 if ((unlikely(avail < max_segments))) {
2851 /* we are out of transmit resources */
2852 tx->stop_queue++;
2853 netif_tx_stop_queue(netdev_queue);
2854 return NETDEV_TX_BUSY;
2855 }
2856
2857 /* Setup checksum offloading, if needed */
2858 cksum_offset = 0;
2859 pseudo_hdr_offset = 0;
2860 odd_flag = 0;
2861 flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
2862 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2863 cksum_offset = skb_checksum_start_offset(skb);
2864 pseudo_hdr_offset = cksum_offset + skb->csum_offset;
2865 /* If the headers are excessively large, then we must
2866 * fall back to a software checksum */
2867 if (unlikely(!mss && (cksum_offset > 255 ||
2868 pseudo_hdr_offset > 127))) {
2869 if (skb_checksum_help(skb))
2870 goto drop;
2871 cksum_offset = 0;
2872 pseudo_hdr_offset = 0;
2873 } else {
2874 odd_flag = MXGEFW_FLAGS_ALIGN_ODD;
2875 flags |= MXGEFW_FLAGS_CKSUM;
2876 }
2877 }
2878
2879 cum_len = 0;
2880
2881 if (mss) { /* TSO */
2882 /* this removes any CKSUM flag from before */
2883 flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST);
2884
2885 /* negative cum_len signifies to the
2886 * send loop that we are still in the
2887 * header portion of the TSO packet.
2888 * TSO header can be at most 1KB long */
2889 cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb));
2890
2891 /* for IPv6 TSO, the checksum offset stores the
2892 * TCP header length, to save the firmware from
2893 * the need to parse the headers */
2894 if (skb_is_gso_v6(skb)) {
2895 cksum_offset = tcp_hdrlen(skb);
2896 /* Can only handle headers <= max_tso6 long */
2897 if (unlikely(-cum_len > mgp->max_tso6))
2898 return myri10ge_sw_tso(skb, dev);
2899 }
2900 /* for TSO, pseudo_hdr_offset holds mss.
2901 * The firmware figures out where to put
2902 * the checksum by parsing the header. */
2903 pseudo_hdr_offset = mss;
2904 } else
2905 /* Mark small packets, and pad out tiny packets */
2906 if (skb->len <= MXGEFW_SEND_SMALL_SIZE) {
2907 flags |= MXGEFW_FLAGS_SMALL;
2908
2909 /* pad frames to at least ETH_ZLEN bytes */
2910 if (eth_skb_pad(skb)) {
2911 /* The packet is gone, so we must
2912 * return 0 */
2913 ss->stats.tx_dropped += 1;
2914 return NETDEV_TX_OK;
2915 }
2916 }
2917
2918 /* map the skb for DMA */
2919 len = skb_headlen(skb);
2920 bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE);
2921 if (unlikely(pci_dma_mapping_error(mgp->pdev, bus)))
2922 goto drop;
2923
2924 idx = tx->req & tx->mask;
2925 tx->info[idx].skb = skb;
2926 dma_unmap_addr_set(&tx->info[idx], bus, bus);
2927 dma_unmap_len_set(&tx->info[idx], len, len);
2928
2929 frag_cnt = skb_shinfo(skb)->nr_frags;
2930 frag_idx = 0;
2931 count = 0;
2932 rdma_count = 0;
2933
2934 /* "rdma_count" is the number of RDMAs belonging to the
2935 * current packet BEFORE the current send request. For
2936 * non-TSO packets, this is equal to "count".
2937 * For TSO packets, rdma_count needs to be reset
2938 * to 0 after a segment cut.
2939 *
2940 * The rdma_count field of the send request is
2941 * the number of RDMAs of the packet starting at
2942 * that request. For TSO send requests with one ore more cuts
2943 * in the middle, this is the number of RDMAs starting
2944 * after the last cut in the request. All previous
2945 * segments before the last cut implicitly have 1 RDMA.
2946 *
2947 * Since the number of RDMAs is not known beforehand,
2948 * it must be filled-in retroactively - after each
2949 * segmentation cut or at the end of the entire packet.
2950 */
2951
2952 while (1) {
2953 /* Break the SKB or Fragment up into pieces which
2954 * do not cross mgp->tx_boundary */
2955 low = MYRI10GE_LOWPART_TO_U32(bus);
2956 high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
2957 while (len) {
2958 u8 flags_next;
2959 int cum_len_next;
2960
2961 if (unlikely(count == max_segments))
2962 goto abort_linearize;
2963
2964 boundary =
2965 (low + mgp->tx_boundary) & ~(mgp->tx_boundary - 1);
2966 seglen = boundary - low;
2967 if (seglen > len)
2968 seglen = len;
2969 flags_next = flags & ~MXGEFW_FLAGS_FIRST;
2970 cum_len_next = cum_len + seglen;
2971 if (mss) { /* TSO */
2972 (req - rdma_count)->rdma_count = rdma_count + 1;
2973
2974 if (likely(cum_len >= 0)) { /* payload */
2975 int next_is_first, chop;
2976
2977 chop = (cum_len_next > mss);
2978 cum_len_next = cum_len_next % mss;
2979 next_is_first = (cum_len_next == 0);
2980 flags |= chop * MXGEFW_FLAGS_TSO_CHOP;
2981 flags_next |= next_is_first *
2982 MXGEFW_FLAGS_FIRST;
2983 rdma_count |= -(chop | next_is_first);
2984 rdma_count += chop & ~next_is_first;
2985 } else if (likely(cum_len_next >= 0)) { /* header ends */
2986 int small;
2987
2988 rdma_count = -1;
2989 cum_len_next = 0;
2990 seglen = -cum_len;
2991 small = (mss <= MXGEFW_SEND_SMALL_SIZE);
2992 flags_next = MXGEFW_FLAGS_TSO_PLD |
2993 MXGEFW_FLAGS_FIRST |
2994 (small * MXGEFW_FLAGS_SMALL);
2995 }
2996 }
2997 req->addr_high = high_swapped;
2998 req->addr_low = htonl(low);
2999 req->pseudo_hdr_offset = htons(pseudo_hdr_offset);
3000 req->pad = 0; /* complete solid 16-byte block; does this matter? */
3001 req->rdma_count = 1;
3002 req->length = htons(seglen);
3003 req->cksum_offset = cksum_offset;
3004 req->flags = flags | ((cum_len & 1) * odd_flag);
3005
3006 low += seglen;
3007 len -= seglen;
3008 cum_len = cum_len_next;
3009 flags = flags_next;
3010 req++;
3011 count++;
3012 rdma_count++;
3013 if (cksum_offset != 0 && !(mss && skb_is_gso_v6(skb))) {
3014 if (unlikely(cksum_offset > seglen))
3015 cksum_offset -= seglen;
3016 else
3017 cksum_offset = 0;
3018 }
3019 }
3020 if (frag_idx == frag_cnt)
3021 break;
3022
3023 /* map next fragment for DMA */
3024 frag = &skb_shinfo(skb)->frags[frag_idx];
3025 frag_idx++;
3026 len = skb_frag_size(frag);
3027 bus = skb_frag_dma_map(&mgp->pdev->dev, frag, 0, len,
3028 DMA_TO_DEVICE);
3029 if (unlikely(pci_dma_mapping_error(mgp->pdev, bus))) {
3030 myri10ge_unmap_tx_dma(mgp, tx, idx);
3031 goto drop;
3032 }
3033 idx = (count + tx->req) & tx->mask;
3034 dma_unmap_addr_set(&tx->info[idx], bus, bus);
3035 dma_unmap_len_set(&tx->info[idx], len, len);
3036 }
3037
3038 (req - rdma_count)->rdma_count = rdma_count;
3039 if (mss)
3040 do {
3041 req--;
3042 req->flags |= MXGEFW_FLAGS_TSO_LAST;
3043 } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP |
3044 MXGEFW_FLAGS_FIRST)));
3045 idx = ((count - 1) + tx->req) & tx->mask;
3046 tx->info[idx].last = 1;
3047 myri10ge_submit_req(tx, tx->req_list, count);
3048 /* if using multiple tx queues, make sure NIC polls the
3049 * current slice */
3050 if ((mgp->dev->real_num_tx_queues > 1) && tx->queue_active == 0) {
3051 tx->queue_active = 1;
3052 put_be32(htonl(1), tx->send_go);
3053 mb();
3054 mmiowb();
3055 }
3056 tx->pkt_start++;
3057 if ((avail - count) < MXGEFW_MAX_SEND_DESC) {
3058 tx->stop_queue++;
3059 netif_tx_stop_queue(netdev_queue);
3060 }
3061 return NETDEV_TX_OK;
3062
3063 abort_linearize:
3064 myri10ge_unmap_tx_dma(mgp, tx, idx);
3065
3066 if (skb_is_gso(skb)) {
3067 netdev_err(mgp->dev, "TSO but wanted to linearize?!?!?\n");
3068 goto drop;
3069 }
3070
3071 if (skb_linearize(skb))
3072 goto drop;
3073
3074 tx->linearized++;
3075 goto again;
3076
3077 drop:
3078 dev_kfree_skb_any(skb);
3079 ss->stats.tx_dropped += 1;
3080 return NETDEV_TX_OK;
3081
3082 }
3083
3084 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
3085 struct net_device *dev)
3086 {
3087 struct sk_buff *segs, *curr;
3088 struct myri10ge_priv *mgp = netdev_priv(dev);
3089 struct myri10ge_slice_state *ss;
3090 netdev_tx_t status;
3091
3092 segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO6);
3093 if (IS_ERR(segs))
3094 goto drop;
3095
3096 while (segs) {
3097 curr = segs;
3098 segs = segs->next;
3099 curr->next = NULL;
3100 status = myri10ge_xmit(curr, dev);
3101 if (status != 0) {
3102 dev_kfree_skb_any(curr);
3103 if (segs != NULL) {
3104 curr = segs;
3105 segs = segs->next;
3106 curr->next = NULL;
3107 dev_kfree_skb_any(segs);
3108 }
3109 goto drop;
3110 }
3111 }
3112 dev_kfree_skb_any(skb);
3113 return NETDEV_TX_OK;
3114
3115 drop:
3116 ss = &mgp->ss[skb_get_queue_mapping(skb)];
3117 dev_kfree_skb_any(skb);
3118 ss->stats.tx_dropped += 1;
3119 return NETDEV_TX_OK;
3120 }
3121
3122 static struct rtnl_link_stats64 *myri10ge_get_stats(struct net_device *dev,
3123 struct rtnl_link_stats64 *stats)
3124 {
3125 const struct myri10ge_priv *mgp = netdev_priv(dev);
3126 const struct myri10ge_slice_netstats *slice_stats;
3127 int i;
3128
3129 for (i = 0; i < mgp->num_slices; i++) {
3130 slice_stats = &mgp->ss[i].stats;
3131 stats->rx_packets += slice_stats->rx_packets;
3132 stats->tx_packets += slice_stats->tx_packets;
3133 stats->rx_bytes += slice_stats->rx_bytes;
3134 stats->tx_bytes += slice_stats->tx_bytes;
3135 stats->rx_dropped += slice_stats->rx_dropped;
3136 stats->tx_dropped += slice_stats->tx_dropped;
3137 }
3138 return stats;
3139 }
3140
3141 static void myri10ge_set_multicast_list(struct net_device *dev)
3142 {
3143 struct myri10ge_priv *mgp = netdev_priv(dev);
3144 struct myri10ge_cmd cmd;
3145 struct netdev_hw_addr *ha;
3146 __be32 data[2] = { 0, 0 };
3147 int err;
3148
3149 /* can be called from atomic contexts,
3150 * pass 1 to force atomicity in myri10ge_send_cmd() */
3151 myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1);
3152
3153 /* This firmware is known to not support multicast */
3154 if (!mgp->fw_multicast_support)
3155 return;
3156
3157 /* Disable multicast filtering */
3158
3159 err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1);
3160 if (err != 0) {
3161 netdev_err(dev, "Failed MXGEFW_ENABLE_ALLMULTI, error status: %d\n",
3162 err);
3163 goto abort;
3164 }
3165
3166 if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) {
3167 /* request to disable multicast filtering, so quit here */
3168 return;
3169 }
3170
3171 /* Flush the filters */
3172
3173 err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS,
3174 &cmd, 1);
3175 if (err != 0) {
3176 netdev_err(dev, "Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS, error status: %d\n",
3177 err);
3178 goto abort;
3179 }
3180
3181 /* Walk the multicast list, and add each address */
3182 netdev_for_each_mc_addr(ha, dev) {
3183 memcpy(data, &ha->addr, ETH_ALEN);
3184 cmd.data0 = ntohl(data[0]);
3185 cmd.data1 = ntohl(data[1]);
3186 err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP,
3187 &cmd, 1);
3188
3189 if (err != 0) {
3190 netdev_err(dev, "Failed MXGEFW_JOIN_MULTICAST_GROUP, error status:%d %pM\n",
3191 err, ha->addr);
3192 goto abort;
3193 }
3194 }
3195 /* Enable multicast filtering */
3196 err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1);
3197 if (err != 0) {
3198 netdev_err(dev, "Failed MXGEFW_DISABLE_ALLMULTI, error status: %d\n",
3199 err);
3200 goto abort;
3201 }
3202
3203 return;
3204
3205 abort:
3206 return;
3207 }
3208
3209 static int myri10ge_set_mac_address(struct net_device *dev, void *addr)
3210 {
3211 struct sockaddr *sa = addr;
3212 struct myri10ge_priv *mgp = netdev_priv(dev);
3213 int status;
3214
3215 if (!is_valid_ether_addr(sa->sa_data))
3216 return -EADDRNOTAVAIL;
3217
3218 status = myri10ge_update_mac_address(mgp, sa->sa_data);
3219 if (status != 0) {
3220 netdev_err(dev, "changing mac address failed with %d\n",
3221 status);
3222 return status;
3223 }
3224
3225 /* change the dev structure */
3226 memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN);
3227 return 0;
3228 }
3229
3230 static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
3231 {
3232 struct myri10ge_priv *mgp = netdev_priv(dev);
3233 int error = 0;
3234
3235 if ((new_mtu < 68) || (ETH_HLEN + new_mtu > MYRI10GE_MAX_ETHER_MTU)) {
3236 netdev_err(dev, "new mtu (%d) is not valid\n", new_mtu);
3237 return -EINVAL;
3238 }
3239 netdev_info(dev, "changing mtu from %d to %d\n", dev->mtu, new_mtu);
3240 if (mgp->running) {
3241 /* if we change the mtu on an active device, we must
3242 * reset the device so the firmware sees the change */
3243 myri10ge_close(dev);
3244 dev->mtu = new_mtu;
3245 myri10ge_open(dev);
3246 } else
3247 dev->mtu = new_mtu;
3248
3249 return error;
3250 }
3251
3252 /*
3253 * Enable ECRC to align PCI-E Completion packets on an 8-byte boundary.
3254 * Only do it if the bridge is a root port since we don't want to disturb
3255 * any other device, except if forced with myri10ge_ecrc_enable > 1.
3256 */
3257
3258 static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
3259 {
3260 struct pci_dev *bridge = mgp->pdev->bus->self;
3261 struct device *dev = &mgp->pdev->dev;
3262 int cap;
3263 unsigned err_cap;
3264 int ret;
3265
3266 if (!myri10ge_ecrc_enable || !bridge)
3267 return;
3268
3269 /* check that the bridge is a root port */
3270 if (pci_pcie_type(bridge) != PCI_EXP_TYPE_ROOT_PORT) {
3271 if (myri10ge_ecrc_enable > 1) {
3272 struct pci_dev *prev_bridge, *old_bridge = bridge;
3273
3274 /* Walk the hierarchy up to the root port
3275 * where ECRC has to be enabled */
3276 do {
3277 prev_bridge = bridge;
3278 bridge = bridge->bus->self;
3279 if (!bridge || prev_bridge == bridge) {
3280 dev_err(dev,
3281 "Failed to find root port"
3282 " to force ECRC\n");
3283 return;
3284 }
3285 } while (pci_pcie_type(bridge) !=
3286 PCI_EXP_TYPE_ROOT_PORT);
3287
3288 dev_info(dev,
3289 "Forcing ECRC on non-root port %s"
3290 " (enabling on root port %s)\n",
3291 pci_name(old_bridge), pci_name(bridge));
3292 } else {
3293 dev_err(dev,
3294 "Not enabling ECRC on non-root port %s\n",
3295 pci_name(bridge));
3296 return;
3297 }
3298 }
3299
3300 cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
3301 if (!cap)
3302 return;
3303
3304 ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap);
3305 if (ret) {
3306 dev_err(dev, "failed reading ext-conf-space of %s\n",
3307 pci_name(bridge));
3308 dev_err(dev, "\t pci=nommconf in use? "
3309 "or buggy/incomplete/absent ACPI MCFG attr?\n");
3310 return;
3311 }
3312 if (!(err_cap & PCI_ERR_CAP_ECRC_GENC))
3313 return;
3314
3315 err_cap |= PCI_ERR_CAP_ECRC_GENE;
3316 pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap);
3317 dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge));
3318 }
3319
3320 /*
3321 * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput
3322 * when the PCI-E Completion packets are aligned on an 8-byte
3323 * boundary. Some PCI-E chip sets always align Completion packets; on
3324 * the ones that do not, the alignment can be enforced by enabling
3325 * ECRC generation (if supported).
3326 *
3327 * When PCI-E Completion packets are not aligned, it is actually more
3328 * efficient to limit Read-DMA transactions to 2KB, rather than 4KB.
3329 *
3330 * If the driver can neither enable ECRC nor verify that it has
3331 * already been enabled, then it must use a firmware image which works
3332 * around unaligned completion packets (myri10ge_rss_ethp_z8e.dat), and it
3333 * should also ensure that it never gives the device a Read-DMA which is
3334 * larger than 2KB by setting the tx_boundary to 2KB. If ECRC is
3335 * enabled, then the driver should use the aligned (myri10ge_rss_eth_z8e.dat)
3336 * firmware image, and set tx_boundary to 4KB.
3337 */
3338
3339 static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
3340 {
3341 struct pci_dev *pdev = mgp->pdev;
3342 struct device *dev = &pdev->dev;
3343 int status;
3344
3345 mgp->tx_boundary = 4096;
3346 /*
3347 * Verify the max read request size was set to 4KB
3348 * before trying the test with 4KB.
3349 */
3350 status = pcie_get_readrq(pdev);
3351 if (status < 0) {
3352 dev_err(dev, "Couldn't read max read req size: %d\n", status);
3353 goto abort;
3354 }
3355 if (status != 4096) {
3356 dev_warn(dev, "Max Read Request size != 4096 (%d)\n", status);
3357 mgp->tx_boundary = 2048;
3358 }
3359 /*
3360 * load the optimized firmware (which assumes aligned PCIe
3361 * completions) in order to see if it works on this host.
3362 */
3363 set_fw_name(mgp, myri10ge_fw_aligned, false);
3364 status = myri10ge_load_firmware(mgp, 1);
3365 if (status != 0) {
3366 goto abort;
3367 }
3368
3369 /*
3370 * Enable ECRC if possible
3371 */
3372 myri10ge_enable_ecrc(mgp);
3373
3374 /*
3375 * Run a DMA test which watches for unaligned completions and
3376 * aborts on the first one seen.
3377 */
3378
3379 status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST);
3380 if (status == 0)
3381 return; /* keep the aligned firmware */
3382
3383 if (status != -E2BIG)
3384 dev_warn(dev, "DMA test failed: %d\n", status);
3385 if (status == -ENOSYS)
3386 dev_warn(dev, "Falling back to ethp! "
3387 "Please install up to date fw\n");
3388 abort:
3389 /* fall back to using the unaligned firmware */
3390 mgp->tx_boundary = 2048;
3391 set_fw_name(mgp, myri10ge_fw_unaligned, false);
3392 }
3393
3394 static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
3395 {
3396 int overridden = 0;
3397
3398 if (myri10ge_force_firmware == 0) {
3399 int link_width;
3400 u16 lnk;
3401
3402 pcie_capability_read_word(mgp->pdev, PCI_EXP_LNKSTA, &lnk);
3403 link_width = (lnk >> 4) & 0x3f;
3404
3405 /* Check to see if Link is less than 8 or if the
3406 * upstream bridge is known to provide aligned
3407 * completions */
3408 if (link_width < 8) {
3409 dev_info(&mgp->pdev->dev, "PCIE x%d Link\n",
3410 link_width);
3411 mgp->tx_boundary = 4096;
3412 set_fw_name(mgp, myri10ge_fw_aligned, false);
3413 } else {
3414 myri10ge_firmware_probe(mgp);
3415 }
3416 } else {
3417 if (myri10ge_force_firmware == 1) {
3418 dev_info(&mgp->pdev->dev,
3419 "Assuming aligned completions (forced)\n");
3420 mgp->tx_boundary = 4096;
3421 set_fw_name(mgp, myri10ge_fw_aligned, false);
3422 } else {
3423 dev_info(&mgp->pdev->dev,
3424 "Assuming unaligned completions (forced)\n");
3425 mgp->tx_boundary = 2048;
3426 set_fw_name(mgp, myri10ge_fw_unaligned, false);
3427 }
3428 }
3429
3430 kernel_param_lock(THIS_MODULE);
3431 if (myri10ge_fw_name != NULL) {
3432 char *fw_name = kstrdup(myri10ge_fw_name, GFP_KERNEL);
3433 if (fw_name) {
3434 overridden = 1;
3435 set_fw_name(mgp, fw_name, true);
3436 }
3437 }
3438 kernel_param_unlock(THIS_MODULE);
3439
3440 if (mgp->board_number < MYRI10GE_MAX_BOARDS &&
3441 myri10ge_fw_names[mgp->board_number] != NULL &&
3442 strlen(myri10ge_fw_names[mgp->board_number])) {
3443 set_fw_name(mgp, myri10ge_fw_names[mgp->board_number], false);
3444 overridden = 1;
3445 }
3446 if (overridden)
3447 dev_info(&mgp->pdev->dev, "overriding firmware to %s\n",
3448 mgp->fw_name);
3449 }
3450
3451 static void myri10ge_mask_surprise_down(struct pci_dev *pdev)
3452 {
3453 struct pci_dev *bridge = pdev->bus->self;
3454 int cap;
3455 u32 mask;
3456
3457 if (bridge == NULL)
3458 return;
3459
3460 cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
3461 if (cap) {
3462 /* a sram parity error can cause a surprise link
3463 * down; since we expect and can recover from sram
3464 * parity errors, mask surprise link down events */
3465 pci_read_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, &mask);
3466 mask |= 0x20;
3467 pci_write_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, mask);
3468 }
3469 }
3470
3471 #ifdef CONFIG_PM
3472 static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state)
3473 {
3474 struct myri10ge_priv *mgp;
3475 struct net_device *netdev;
3476
3477 mgp = pci_get_drvdata(pdev);
3478 if (mgp == NULL)
3479 return -EINVAL;
3480 netdev = mgp->dev;
3481
3482 netif_device_detach(netdev);
3483 if (netif_running(netdev)) {
3484 netdev_info(netdev, "closing\n");
3485 rtnl_lock();
3486 myri10ge_close(netdev);
3487 rtnl_unlock();
3488 }
3489 myri10ge_dummy_rdma(mgp, 0);
3490 pci_save_state(pdev);
3491 pci_disable_device(pdev);
3492
3493 return pci_set_power_state(pdev, pci_choose_state(pdev, state));
3494 }
3495
3496 static int myri10ge_resume(struct pci_dev *pdev)
3497 {
3498 struct myri10ge_priv *mgp;
3499 struct net_device *netdev;
3500 int status;
3501 u16 vendor;
3502
3503 mgp = pci_get_drvdata(pdev);
3504 if (mgp == NULL)
3505 return -EINVAL;
3506 netdev = mgp->dev;
3507 pci_set_power_state(pdev, PCI_D0); /* zeros conf space as a side effect */
3508 msleep(5); /* give card time to respond */
3509 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3510 if (vendor == 0xffff) {
3511 netdev_err(mgp->dev, "device disappeared!\n");
3512 return -EIO;
3513 }
3514
3515 pci_restore_state(pdev);
3516
3517 status = pci_enable_device(pdev);
3518 if (status) {
3519 dev_err(&pdev->dev, "failed to enable device\n");
3520 return status;
3521 }
3522
3523 pci_set_master(pdev);
3524
3525 myri10ge_reset(mgp);
3526 myri10ge_dummy_rdma(mgp, 1);
3527
3528 /* Save configuration space to be restored if the
3529 * nic resets due to a parity error */
3530 pci_save_state(pdev);
3531
3532 if (netif_running(netdev)) {
3533 rtnl_lock();
3534 status = myri10ge_open(netdev);
3535 rtnl_unlock();
3536 if (status != 0)
3537 goto abort_with_enabled;
3538
3539 }
3540 netif_device_attach(netdev);
3541
3542 return 0;
3543
3544 abort_with_enabled:
3545 pci_disable_device(pdev);
3546 return -EIO;
3547
3548 }
3549 #endif /* CONFIG_PM */
3550
3551 static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp)
3552 {
3553 struct pci_dev *pdev = mgp->pdev;
3554 int vs = mgp->vendor_specific_offset;
3555 u32 reboot;
3556
3557 /*enter read32 mode */
3558 pci_write_config_byte(pdev, vs + 0x10, 0x3);
3559
3560 /*read REBOOT_STATUS (0xfffffff0) */
3561 pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0);
3562 pci_read_config_dword(pdev, vs + 0x14, &reboot);
3563 return reboot;
3564 }
3565
3566 static void
3567 myri10ge_check_slice(struct myri10ge_slice_state *ss, int *reset_needed,
3568 int *busy_slice_cnt, u32 rx_pause_cnt)
3569 {
3570 struct myri10ge_priv *mgp = ss->mgp;
3571 int slice = ss - mgp->ss;
3572
3573 if (ss->tx.req != ss->tx.done &&
3574 ss->tx.done == ss->watchdog_tx_done &&
3575 ss->watchdog_tx_req != ss->watchdog_tx_done) {
3576 /* nic seems like it might be stuck.. */
3577 if (rx_pause_cnt != mgp->watchdog_pause) {
3578 if (net_ratelimit())
3579 netdev_warn(mgp->dev, "slice %d: TX paused, "
3580 "check link partner\n", slice);
3581 } else {
3582 netdev_warn(mgp->dev,
3583 "slice %d: TX stuck %d %d %d %d %d %d\n",
3584 slice, ss->tx.queue_active, ss->tx.req,
3585 ss->tx.done, ss->tx.pkt_start,
3586 ss->tx.pkt_done,
3587 (int)ntohl(mgp->ss[slice].fw_stats->
3588 send_done_count));
3589 *reset_needed = 1;
3590 ss->stuck = 1;
3591 }
3592 }
3593 if (ss->watchdog_tx_done != ss->tx.done ||
3594 ss->watchdog_rx_done != ss->rx_done.cnt) {
3595 *busy_slice_cnt += 1;
3596 }
3597 ss->watchdog_tx_done = ss->tx.done;
3598 ss->watchdog_tx_req = ss->tx.req;
3599 ss->watchdog_rx_done = ss->rx_done.cnt;
3600 }
3601
3602 /*
3603 * This watchdog is used to check whether the board has suffered
3604 * from a parity error and needs to be recovered.
3605 */
3606 static void myri10ge_watchdog(struct work_struct *work)
3607 {
3608 struct myri10ge_priv *mgp =
3609 container_of(work, struct myri10ge_priv, watchdog_work);
3610 struct myri10ge_slice_state *ss;
3611 u32 reboot, rx_pause_cnt;
3612 int status, rebooted;
3613 int i;
3614 int reset_needed = 0;
3615 int busy_slice_cnt = 0;
3616 u16 cmd, vendor;
3617
3618 mgp->watchdog_resets++;
3619 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3620 rebooted = 0;
3621 if ((cmd & PCI_COMMAND_MASTER) == 0) {
3622 /* Bus master DMA disabled? Check to see
3623 * if the card rebooted due to a parity error
3624 * For now, just report it */
3625 reboot = myri10ge_read_reboot(mgp);
3626 netdev_err(mgp->dev, "NIC rebooted (0x%x),%s resetting\n",
3627 reboot, myri10ge_reset_recover ? "" : " not");
3628 if (myri10ge_reset_recover == 0)
3629 return;
3630 rtnl_lock();
3631 mgp->rebooted = 1;
3632 rebooted = 1;
3633 myri10ge_close(mgp->dev);
3634 myri10ge_reset_recover--;
3635 mgp->rebooted = 0;
3636 /*
3637 * A rebooted nic will come back with config space as
3638 * it was after power was applied to PCIe bus.
3639 * Attempt to restore config space which was saved
3640 * when the driver was loaded, or the last time the
3641 * nic was resumed from power saving mode.
3642 */
3643 pci_restore_state(mgp->pdev);
3644
3645 /* save state again for accounting reasons */
3646 pci_save_state(mgp->pdev);
3647
3648 } else {
3649 /* if we get back -1's from our slot, perhaps somebody
3650 * powered off our card. Don't try to reset it in
3651 * this case */
3652 if (cmd == 0xffff) {
3653 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3654 if (vendor == 0xffff) {
3655 netdev_err(mgp->dev, "device disappeared!\n");
3656 return;
3657 }
3658 }
3659 /* Perhaps it is a software error. See if stuck slice
3660 * has recovered, reset if not */
3661 rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3662 for (i = 0; i < mgp->num_slices; i++) {
3663 ss = mgp->ss;
3664 if (ss->stuck) {
3665 myri10ge_check_slice(ss, &reset_needed,
3666 &busy_slice_cnt,
3667 rx_pause_cnt);
3668 ss->stuck = 0;
3669 }
3670 }
3671 if (!reset_needed) {
3672 netdev_dbg(mgp->dev, "not resetting\n");
3673 return;
3674 }
3675
3676 netdev_err(mgp->dev, "device timeout, resetting\n");
3677 }
3678
3679 if (!rebooted) {
3680 rtnl_lock();
3681 myri10ge_close(mgp->dev);
3682 }
3683 status = myri10ge_load_firmware(mgp, 1);
3684 if (status != 0)
3685 netdev_err(mgp->dev, "failed to load firmware\n");
3686 else
3687 myri10ge_open(mgp->dev);
3688 rtnl_unlock();
3689 }
3690
3691 /*
3692 * We use our own timer routine rather than relying upon
3693 * netdev->tx_timeout because we have a very large hardware transmit
3694 * queue. Due to the large queue, the netdev->tx_timeout function
3695 * cannot detect a NIC with a parity error in a timely fashion if the
3696 * NIC is lightly loaded.
3697 */
3698 static void myri10ge_watchdog_timer(unsigned long arg)
3699 {
3700 struct myri10ge_priv *mgp;
3701 struct myri10ge_slice_state *ss;
3702 int i, reset_needed, busy_slice_cnt;
3703 u32 rx_pause_cnt;
3704 u16 cmd;
3705
3706 mgp = (struct myri10ge_priv *)arg;
3707
3708 rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3709 busy_slice_cnt = 0;
3710 for (i = 0, reset_needed = 0;
3711 i < mgp->num_slices && reset_needed == 0; ++i) {
3712
3713 ss = &mgp->ss[i];
3714 if (ss->rx_small.watchdog_needed) {
3715 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
3716 mgp->small_bytes + MXGEFW_PAD,
3717 1);
3718 if (ss->rx_small.fill_cnt - ss->rx_small.cnt >=
3719 myri10ge_fill_thresh)
3720 ss->rx_small.watchdog_needed = 0;
3721 }
3722 if (ss->rx_big.watchdog_needed) {
3723 myri10ge_alloc_rx_pages(mgp, &ss->rx_big,
3724 mgp->big_bytes, 1);
3725 if (ss->rx_big.fill_cnt - ss->rx_big.cnt >=
3726 myri10ge_fill_thresh)
3727 ss->rx_big.watchdog_needed = 0;
3728 }
3729 myri10ge_check_slice(ss, &reset_needed, &busy_slice_cnt,
3730 rx_pause_cnt);
3731 }
3732 /* if we've sent or received no traffic, poll the NIC to
3733 * ensure it is still there. Otherwise, we risk not noticing
3734 * an error in a timely fashion */
3735 if (busy_slice_cnt == 0) {
3736 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3737 if ((cmd & PCI_COMMAND_MASTER) == 0) {
3738 reset_needed = 1;
3739 }
3740 }
3741 mgp->watchdog_pause = rx_pause_cnt;
3742
3743 if (reset_needed) {
3744 schedule_work(&mgp->watchdog_work);
3745 } else {
3746 /* rearm timer */
3747 mod_timer(&mgp->watchdog_timer,
3748 jiffies + myri10ge_watchdog_timeout * HZ);
3749 }
3750 }
3751
3752 static void myri10ge_free_slices(struct myri10ge_priv *mgp)
3753 {
3754 struct myri10ge_slice_state *ss;
3755 struct pci_dev *pdev = mgp->pdev;
3756 size_t bytes;
3757 int i;
3758
3759 if (mgp->ss == NULL)
3760 return;
3761
3762 for (i = 0; i < mgp->num_slices; i++) {
3763 ss = &mgp->ss[i];
3764 if (ss->rx_done.entry != NULL) {
3765 bytes = mgp->max_intr_slots *
3766 sizeof(*ss->rx_done.entry);
3767 dma_free_coherent(&pdev->dev, bytes,
3768 ss->rx_done.entry, ss->rx_done.bus);
3769 ss->rx_done.entry = NULL;
3770 }
3771 if (ss->fw_stats != NULL) {
3772 bytes = sizeof(*ss->fw_stats);
3773 dma_free_coherent(&pdev->dev, bytes,
3774 ss->fw_stats, ss->fw_stats_bus);
3775 ss->fw_stats = NULL;
3776 }
3777 napi_hash_del(&ss->napi);
3778 netif_napi_del(&ss->napi);
3779 }
3780 /* Wait till napi structs are no longer used, and then free ss. */
3781 synchronize_rcu();
3782 kfree(mgp->ss);
3783 mgp->ss = NULL;
3784 }
3785
3786 static int myri10ge_alloc_slices(struct myri10ge_priv *mgp)
3787 {
3788 struct myri10ge_slice_state *ss;
3789 struct pci_dev *pdev = mgp->pdev;
3790 size_t bytes;
3791 int i;
3792
3793 bytes = sizeof(*mgp->ss) * mgp->num_slices;
3794 mgp->ss = kzalloc(bytes, GFP_KERNEL);
3795 if (mgp->ss == NULL) {
3796 return -ENOMEM;
3797 }
3798
3799 for (i = 0; i < mgp->num_slices; i++) {
3800 ss = &mgp->ss[i];
3801 bytes = mgp->max_intr_slots * sizeof(*ss->rx_done.entry);
3802 ss->rx_done.entry = dma_zalloc_coherent(&pdev->dev, bytes,
3803 &ss->rx_done.bus,
3804 GFP_KERNEL);
3805 if (ss->rx_done.entry == NULL)
3806 goto abort;
3807 bytes = sizeof(*ss->fw_stats);
3808 ss->fw_stats = dma_alloc_coherent(&pdev->dev, bytes,
3809 &ss->fw_stats_bus,
3810 GFP_KERNEL);
3811 if (ss->fw_stats == NULL)
3812 goto abort;
3813 ss->mgp = mgp;
3814 ss->dev = mgp->dev;
3815 netif_napi_add(ss->dev, &ss->napi, myri10ge_poll,
3816 myri10ge_napi_weight);
3817 }
3818 return 0;
3819 abort:
3820 myri10ge_free_slices(mgp);
3821 return -ENOMEM;
3822 }
3823
3824 /*
3825 * This function determines the number of slices supported.
3826 * The number slices is the minimum of the number of CPUS,
3827 * the number of MSI-X irqs supported, the number of slices
3828 * supported by the firmware
3829 */
3830 static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
3831 {
3832 struct myri10ge_cmd cmd;
3833 struct pci_dev *pdev = mgp->pdev;
3834 char *old_fw;
3835 bool old_allocated;
3836 int i, status, ncpus;
3837
3838 mgp->num_slices = 1;
3839 ncpus = netif_get_num_default_rss_queues();
3840
3841 if (myri10ge_max_slices == 1 || !pdev->msix_cap ||
3842 (myri10ge_max_slices == -1 && ncpus < 2))
3843 return;
3844
3845 /* try to load the slice aware rss firmware */
3846 old_fw = mgp->fw_name;
3847 old_allocated = mgp->fw_name_allocated;
3848 /* don't free old_fw if we override it. */
3849 mgp->fw_name_allocated = false;
3850
3851 if (myri10ge_fw_name != NULL) {
3852 dev_info(&mgp->pdev->dev, "overriding rss firmware to %s\n",
3853 myri10ge_fw_name);
3854 set_fw_name(mgp, myri10ge_fw_name, false);
3855 } else if (old_fw == myri10ge_fw_aligned)
3856 set_fw_name(mgp, myri10ge_fw_rss_aligned, false);
3857 else
3858 set_fw_name(mgp, myri10ge_fw_rss_unaligned, false);
3859 status = myri10ge_load_firmware(mgp, 0);
3860 if (status != 0) {
3861 dev_info(&pdev->dev, "Rss firmware not found\n");
3862 if (old_allocated)
3863 kfree(old_fw);
3864 return;
3865 }
3866
3867 /* hit the board with a reset to ensure it is alive */
3868 memset(&cmd, 0, sizeof(cmd));
3869 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
3870 if (status != 0) {
3871 dev_err(&mgp->pdev->dev, "failed reset\n");
3872 goto abort_with_fw;
3873 }
3874
3875 mgp->max_intr_slots = cmd.data0 / sizeof(struct mcp_slot);
3876
3877 /* tell it the size of the interrupt queues */
3878 cmd.data0 = mgp->max_intr_slots * sizeof(struct mcp_slot);
3879 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
3880 if (status != 0) {
3881 dev_err(&mgp->pdev->dev, "failed MXGEFW_CMD_SET_INTRQ_SIZE\n");
3882 goto abort_with_fw;
3883 }
3884
3885 /* ask the maximum number of slices it supports */
3886 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES, &cmd, 0);
3887 if (status != 0)
3888 goto abort_with_fw;
3889 else
3890 mgp->num_slices = cmd.data0;
3891
3892 /* Only allow multiple slices if MSI-X is usable */
3893 if (!myri10ge_msi) {
3894 goto abort_with_fw;
3895 }
3896
3897 /* if the admin did not specify a limit to how many
3898 * slices we should use, cap it automatically to the
3899 * number of CPUs currently online */
3900 if (myri10ge_max_slices == -1)
3901 myri10ge_max_slices = ncpus;
3902
3903 if (mgp->num_slices > myri10ge_max_slices)
3904 mgp->num_slices = myri10ge_max_slices;
3905
3906 /* Now try to allocate as many MSI-X vectors as we have
3907 * slices. We give up on MSI-X if we can only get a single
3908 * vector. */
3909
3910 mgp->msix_vectors = kcalloc(mgp->num_slices, sizeof(*mgp->msix_vectors),
3911 GFP_KERNEL);
3912 if (mgp->msix_vectors == NULL)
3913 goto no_msix;
3914 for (i = 0; i < mgp->num_slices; i++) {
3915 mgp->msix_vectors[i].entry = i;
3916 }
3917
3918 while (mgp->num_slices > 1) {
3919 mgp->num_slices = rounddown_pow_of_two(mgp->num_slices);
3920 if (mgp->num_slices == 1)
3921 goto no_msix;
3922 status = pci_enable_msix_range(pdev,
3923 mgp->msix_vectors,
3924 mgp->num_slices,
3925 mgp->num_slices);
3926 if (status < 0)
3927 goto no_msix;
3928
3929 pci_disable_msix(pdev);
3930
3931 if (status == mgp->num_slices) {
3932 if (old_allocated)
3933 kfree(old_fw);
3934 return;
3935 } else {
3936 mgp->num_slices = status;
3937 }
3938 }
3939
3940 no_msix:
3941 if (mgp->msix_vectors != NULL) {
3942 kfree(mgp->msix_vectors);
3943 mgp->msix_vectors = NULL;
3944 }
3945
3946 abort_with_fw:
3947 mgp->num_slices = 1;
3948 set_fw_name(mgp, old_fw, old_allocated);
3949 myri10ge_load_firmware(mgp, 0);
3950 }
3951
3952 static const struct net_device_ops myri10ge_netdev_ops = {
3953 .ndo_open = myri10ge_open,
3954 .ndo_stop = myri10ge_close,
3955 .ndo_start_xmit = myri10ge_xmit,
3956 .ndo_get_stats64 = myri10ge_get_stats,
3957 .ndo_validate_addr = eth_validate_addr,
3958 .ndo_change_mtu = myri10ge_change_mtu,
3959 .ndo_set_rx_mode = myri10ge_set_multicast_list,
3960 .ndo_set_mac_address = myri10ge_set_mac_address,
3961 #ifdef CONFIG_NET_RX_BUSY_POLL
3962 .ndo_busy_poll = myri10ge_busy_poll,
3963 #endif
3964 };
3965
3966 static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3967 {
3968 struct net_device *netdev;
3969 struct myri10ge_priv *mgp;
3970 struct device *dev = &pdev->dev;
3971 int i;
3972 int status = -ENXIO;
3973 int dac_enabled;
3974 unsigned hdr_offset, ss_offset;
3975 static int board_number;
3976
3977 netdev = alloc_etherdev_mq(sizeof(*mgp), MYRI10GE_MAX_SLICES);
3978 if (netdev == NULL)
3979 return -ENOMEM;
3980
3981 SET_NETDEV_DEV(netdev, &pdev->dev);
3982
3983 mgp = netdev_priv(netdev);
3984 mgp->dev = netdev;
3985 mgp->pdev = pdev;
3986 mgp->pause = myri10ge_flow_control;
3987 mgp->intr_coal_delay = myri10ge_intr_coal_delay;
3988 mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT);
3989 mgp->board_number = board_number;
3990 init_waitqueue_head(&mgp->down_wq);
3991
3992 if (pci_enable_device(pdev)) {
3993 dev_err(&pdev->dev, "pci_enable_device call failed\n");
3994 status = -ENODEV;
3995 goto abort_with_netdev;
3996 }
3997
3998 /* Find the vendor-specific cap so we can check
3999 * the reboot register later on */
4000 mgp->vendor_specific_offset
4001 = pci_find_capability(pdev, PCI_CAP_ID_VNDR);
4002
4003 /* Set our max read request to 4KB */
4004 status = pcie_set_readrq(pdev, 4096);
4005 if (status != 0) {
4006 dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n",
4007 status);
4008 goto abort_with_enabled;
4009 }
4010
4011 myri10ge_mask_surprise_down(pdev);
4012 pci_set_master(pdev);
4013 dac_enabled = 1;
4014 status = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
4015 if (status != 0) {
4016 dac_enabled = 0;
4017 dev_err(&pdev->dev,
4018 "64-bit pci address mask was refused, "
4019 "trying 32-bit\n");
4020 status = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4021 }
4022 if (status != 0) {
4023 dev_err(&pdev->dev, "Error %d setting DMA mask\n", status);
4024 goto abort_with_enabled;
4025 }
4026 (void)pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
4027 mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd),
4028 &mgp->cmd_bus, GFP_KERNEL);
4029 if (!mgp->cmd) {
4030 status = -ENOMEM;
4031 goto abort_with_enabled;
4032 }
4033
4034 mgp->board_span = pci_resource_len(pdev, 0);
4035 mgp->iomem_base = pci_resource_start(pdev, 0);
4036 mgp->wc_cookie = arch_phys_wc_add(mgp->iomem_base, mgp->board_span);
4037 mgp->sram = ioremap_wc(mgp->iomem_base, mgp->board_span);
4038 if (mgp->sram == NULL) {
4039 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n",
4040 mgp->board_span, mgp->iomem_base);
4041 status = -ENXIO;
4042 goto abort_with_mtrr;
4043 }
4044 hdr_offset =
4045 swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET)) & 0xffffc;
4046 ss_offset = hdr_offset + offsetof(struct mcp_gen_header, string_specs);
4047 mgp->sram_size = swab32(readl(mgp->sram + ss_offset));
4048 if (mgp->sram_size > mgp->board_span ||
4049 mgp->sram_size <= MYRI10GE_FW_OFFSET) {
4050 dev_err(&pdev->dev,
4051 "invalid sram_size %dB or board span %ldB\n",
4052 mgp->sram_size, mgp->board_span);
4053 goto abort_with_ioremap;
4054 }
4055 memcpy_fromio(mgp->eeprom_strings,
4056 mgp->sram + mgp->sram_size, MYRI10GE_EEPROM_STRINGS_SIZE);
4057 memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2);
4058 status = myri10ge_read_mac_addr(mgp);
4059 if (status)
4060 goto abort_with_ioremap;
4061
4062 for (i = 0; i < ETH_ALEN; i++)
4063 netdev->dev_addr[i] = mgp->mac_addr[i];
4064
4065 myri10ge_select_firmware(mgp);
4066
4067 status = myri10ge_load_firmware(mgp, 1);
4068 if (status != 0) {
4069 dev_err(&pdev->dev, "failed to load firmware\n");
4070 goto abort_with_ioremap;
4071 }
4072 myri10ge_probe_slices(mgp);
4073 status = myri10ge_alloc_slices(mgp);
4074 if (status != 0) {
4075 dev_err(&pdev->dev, "failed to alloc slice state\n");
4076 goto abort_with_firmware;
4077 }
4078 netif_set_real_num_tx_queues(netdev, mgp->num_slices);
4079 netif_set_real_num_rx_queues(netdev, mgp->num_slices);
4080 status = myri10ge_reset(mgp);
4081 if (status != 0) {
4082 dev_err(&pdev->dev, "failed reset\n");
4083 goto abort_with_slices;
4084 }
4085 #ifdef CONFIG_MYRI10GE_DCA
4086 myri10ge_setup_dca(mgp);
4087 #endif
4088 pci_set_drvdata(pdev, mgp);
4089 if ((myri10ge_initial_mtu + ETH_HLEN) > MYRI10GE_MAX_ETHER_MTU)
4090 myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
4091 if ((myri10ge_initial_mtu + ETH_HLEN) < 68)
4092 myri10ge_initial_mtu = 68;
4093
4094 netdev->netdev_ops = &myri10ge_netdev_ops;
4095 netdev->mtu = myri10ge_initial_mtu;
4096 netdev->hw_features = mgp->features | NETIF_F_RXCSUM;
4097
4098 /* fake NETIF_F_HW_VLAN_CTAG_RX for good GRO performance */
4099 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
4100
4101 netdev->features = netdev->hw_features;
4102
4103 if (dac_enabled)
4104 netdev->features |= NETIF_F_HIGHDMA;
4105
4106 netdev->vlan_features |= mgp->features;
4107 if (mgp->fw_ver_tiny < 37)
4108 netdev->vlan_features &= ~NETIF_F_TSO6;
4109 if (mgp->fw_ver_tiny < 32)
4110 netdev->vlan_features &= ~NETIF_F_TSO;
4111
4112 /* make sure we can get an irq, and that MSI can be
4113 * setup (if available). */
4114 status = myri10ge_request_irq(mgp);
4115 if (status != 0)
4116 goto abort_with_firmware;
4117 myri10ge_free_irq(mgp);
4118
4119 /* Save configuration space to be restored if the
4120 * nic resets due to a parity error */
4121 pci_save_state(pdev);
4122
4123 /* Setup the watchdog timer */
4124 setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer,
4125 (unsigned long)mgp);
4126
4127 netdev->ethtool_ops = &myri10ge_ethtool_ops;
4128 INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog);
4129 status = register_netdev(netdev);
4130 if (status != 0) {
4131 dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
4132 goto abort_with_state;
4133 }
4134 if (mgp->msix_enabled)
4135 dev_info(dev, "%d MSI-X IRQs, tx bndry %d, fw %s, MTRR %s, WC Enabled\n",
4136 mgp->num_slices, mgp->tx_boundary, mgp->fw_name,
4137 (mgp->wc_cookie > 0 ? "Enabled" : "Disabled"));
4138 else
4139 dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, MTRR %s, WC Enabled\n",
4140 mgp->msi_enabled ? "MSI" : "xPIC",
4141 pdev->irq, mgp->tx_boundary, mgp->fw_name,
4142 (mgp->wc_cookie > 0 ? "Enabled" : "Disabled"));
4143
4144 board_number++;
4145 return 0;
4146
4147 abort_with_state:
4148 pci_restore_state(pdev);
4149
4150 abort_with_slices:
4151 myri10ge_free_slices(mgp);
4152
4153 abort_with_firmware:
4154 myri10ge_dummy_rdma(mgp, 0);
4155
4156 abort_with_ioremap:
4157 if (mgp->mac_addr_string != NULL)
4158 dev_err(&pdev->dev,
4159 "myri10ge_probe() failed: MAC=%s, SN=%ld\n",
4160 mgp->mac_addr_string, mgp->serial_number);
4161 iounmap(mgp->sram);
4162
4163 abort_with_mtrr:
4164 arch_phys_wc_del(mgp->wc_cookie);
4165 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
4166 mgp->cmd, mgp->cmd_bus);
4167
4168 abort_with_enabled:
4169 pci_disable_device(pdev);
4170
4171 abort_with_netdev:
4172 set_fw_name(mgp, NULL, false);
4173 free_netdev(netdev);
4174 return status;
4175 }
4176
4177 /*
4178 * myri10ge_remove
4179 *
4180 * Does what is necessary to shutdown one Myrinet device. Called
4181 * once for each Myrinet card by the kernel when a module is
4182 * unloaded.
4183 */
4184 static void myri10ge_remove(struct pci_dev *pdev)
4185 {
4186 struct myri10ge_priv *mgp;
4187 struct net_device *netdev;
4188
4189 mgp = pci_get_drvdata(pdev);
4190 if (mgp == NULL)
4191 return;
4192
4193 cancel_work_sync(&mgp->watchdog_work);
4194 netdev = mgp->dev;
4195 unregister_netdev(netdev);
4196
4197 #ifdef CONFIG_MYRI10GE_DCA
4198 myri10ge_teardown_dca(mgp);
4199 #endif
4200 myri10ge_dummy_rdma(mgp, 0);
4201
4202 /* avoid a memory leak */
4203 pci_restore_state(pdev);
4204
4205 iounmap(mgp->sram);
4206 arch_phys_wc_del(mgp->wc_cookie);
4207 myri10ge_free_slices(mgp);
4208 kfree(mgp->msix_vectors);
4209 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
4210 mgp->cmd, mgp->cmd_bus);
4211
4212 set_fw_name(mgp, NULL, false);
4213 free_netdev(netdev);
4214 pci_disable_device(pdev);
4215 }
4216
4217 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E 0x0008
4218 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9 0x0009
4219
4220 static const struct pci_device_id myri10ge_pci_tbl[] = {
4221 {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)},
4222 {PCI_DEVICE
4223 (PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9)},
4224 {0},
4225 };
4226
4227 MODULE_DEVICE_TABLE(pci, myri10ge_pci_tbl);
4228
4229 static struct pci_driver myri10ge_driver = {
4230 .name = "myri10ge",
4231 .probe = myri10ge_probe,
4232 .remove = myri10ge_remove,
4233 .id_table = myri10ge_pci_tbl,
4234 #ifdef CONFIG_PM
4235 .suspend = myri10ge_suspend,
4236 .resume = myri10ge_resume,
4237 #endif
4238 };
4239
4240 #ifdef CONFIG_MYRI10GE_DCA
4241 static int
4242 myri10ge_notify_dca(struct notifier_block *nb, unsigned long event, void *p)
4243 {
4244 int err = driver_for_each_device(&myri10ge_driver.driver,
4245 NULL, &event,
4246 myri10ge_notify_dca_device);
4247
4248 if (err)
4249 return NOTIFY_BAD;
4250 return NOTIFY_DONE;
4251 }
4252
4253 static struct notifier_block myri10ge_dca_notifier = {
4254 .notifier_call = myri10ge_notify_dca,
4255 .next = NULL,
4256 .priority = 0,
4257 };
4258 #endif /* CONFIG_MYRI10GE_DCA */
4259
4260 static __init int myri10ge_init_module(void)
4261 {
4262 pr_info("Version %s\n", MYRI10GE_VERSION_STR);
4263
4264 if (myri10ge_rss_hash > MXGEFW_RSS_HASH_TYPE_MAX) {
4265 pr_err("Illegal rssh hash type %d, defaulting to source port\n",
4266 myri10ge_rss_hash);
4267 myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT;
4268 }
4269 #ifdef CONFIG_MYRI10GE_DCA
4270 dca_register_notify(&myri10ge_dca_notifier);
4271 #endif
4272 if (myri10ge_max_slices > MYRI10GE_MAX_SLICES)
4273 myri10ge_max_slices = MYRI10GE_MAX_SLICES;
4274
4275 return pci_register_driver(&myri10ge_driver);
4276 }
4277
4278 module_init(myri10ge_init_module);
4279
4280 static __exit void myri10ge_cleanup_module(void)
4281 {
4282 #ifdef CONFIG_MYRI10GE_DCA
4283 dca_unregister_notify(&myri10ge_dca_notifier);
4284 #endif
4285 pci_unregister_driver(&myri10ge_driver);
4286 }
4287
4288 module_exit(myri10ge_cleanup_module);
Linux with added FPC-III support