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fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / drivers / net / myri10ge / myri10ge.c
blob64c8151f200401aca8bf9d4c21e4c07f82850176
1 /*************************************************************************
2 * myri10ge.c: Myricom Myri-10G Ethernet driver.
3 *
4 * Copyright (C) 2005 - 2007 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 #include <linux/tcp.h>
42 #include <linux/netdevice.h>
43 #include <linux/skbuff.h>
44 #include <linux/string.h>
45 #include <linux/module.h>
46 #include <linux/pci.h>
47 #include <linux/dma-mapping.h>
48 #include <linux/etherdevice.h>
49 #include <linux/if_ether.h>
50 #include <linux/if_vlan.h>
51 #include <linux/inet_lro.h>
52 #include <linux/ip.h>
53 #include <linux/inet.h>
54 #include <linux/in.h>
55 #include <linux/ethtool.h>
56 #include <linux/firmware.h>
57 #include <linux/delay.h>
58 #include <linux/version.h>
59 #include <linux/timer.h>
60 #include <linux/vmalloc.h>
61 #include <linux/crc32.h>
62 #include <linux/moduleparam.h>
63 #include <linux/io.h>
64 #include <linux/log2.h>
65 #include <net/checksum.h>
66 #include <net/ip.h>
67 #include <net/tcp.h>
68 #include <asm/byteorder.h>
69 #include <asm/io.h>
70 #include <asm/processor.h>
71 #ifdef CONFIG_MTRR
72 #include <asm/mtrr.h>
73 #endif
74
75 #include "myri10ge_mcp.h"
76 #include "myri10ge_mcp_gen_header.h"
77
78 #define MYRI10GE_VERSION_STR "1.3.2-1.287"
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 #define MYRI10GE_MAX_LRO_DESCRIPTORS 8
96 #define MYRI10GE_LRO_MAX_PKTS 64
97
98 #define MYRI10GE_NO_CONFIRM_DATA htonl(0xffffffff)
99 #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff
100
101 #define MYRI10GE_ALLOC_ORDER 0
102 #define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE)
103 #define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1)
104
105 struct myri10ge_rx_buffer_state {
106 struct page *page;
107 int page_offset;
108 DECLARE_PCI_UNMAP_ADDR(bus)
109 DECLARE_PCI_UNMAP_LEN(len)
110 };
111
112 struct myri10ge_tx_buffer_state {
113 struct sk_buff *skb;
114 int last;
115 DECLARE_PCI_UNMAP_ADDR(bus)
116 DECLARE_PCI_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 u8 __iomem *wc_fifo; /* w/c rx dma addr fifo address */
128 struct mcp_kreq_ether_recv *shadow; /* host shadow of recv ring */
129 struct myri10ge_rx_buffer_state *info;
130 struct page *page;
131 dma_addr_t bus;
132 int page_offset;
133 int cnt;
134 int fill_cnt;
135 int alloc_fail;
136 int mask; /* number of rx slots -1 */
137 int watchdog_needed;
138 };
139
140 struct myri10ge_tx_buf {
141 struct mcp_kreq_ether_send __iomem *lanai; /* lanai ptr for sendq */
142 u8 __iomem *wc_fifo; /* w/c send fifo address */
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 boundary; /* boundary transmits cannot cross */
148 int req ____cacheline_aligned; /* transmit slots submitted */
149 int pkt_start; /* packets started */
150 int done ____cacheline_aligned; /* transmit slots completed */
151 int pkt_done; /* packets completed */
152 };
153
154 struct myri10ge_rx_done {
155 struct mcp_slot *entry;
156 dma_addr_t bus;
157 int cnt;
158 int idx;
159 struct net_lro_mgr lro_mgr;
160 struct net_lro_desc lro_desc[MYRI10GE_MAX_LRO_DESCRIPTORS];
161 };
162
163 struct myri10ge_priv {
164 int running; /* running? */
165 int csum_flag; /* rx_csums? */
166 struct myri10ge_tx_buf tx; /* transmit ring */
167 struct myri10ge_rx_buf rx_small;
168 struct myri10ge_rx_buf rx_big;
169 struct myri10ge_rx_done rx_done;
170 int small_bytes;
171 int big_bytes;
172 struct net_device *dev;
173 struct napi_struct napi;
174 struct net_device_stats stats;
175 u8 __iomem *sram;
176 int sram_size;
177 unsigned long board_span;
178 unsigned long iomem_base;
179 __be32 __iomem *irq_claim;
180 __be32 __iomem *irq_deassert;
181 char *mac_addr_string;
182 struct mcp_cmd_response *cmd;
183 dma_addr_t cmd_bus;
184 struct mcp_irq_data *fw_stats;
185 dma_addr_t fw_stats_bus;
186 struct pci_dev *pdev;
187 int msi_enabled;
188 __be32 link_state;
189 unsigned int rdma_tags_available;
190 int intr_coal_delay;
191 __be32 __iomem *intr_coal_delay_ptr;
192 int mtrr;
193 int wc_enabled;
194 int wake_queue;
195 int stop_queue;
196 int down_cnt;
197 wait_queue_head_t down_wq;
198 struct work_struct watchdog_work;
199 struct timer_list watchdog_timer;
200 int watchdog_tx_done;
201 int watchdog_tx_req;
202 int watchdog_pause;
203 int watchdog_resets;
204 int tx_linearized;
205 int pause;
206 char *fw_name;
207 char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
208 char fw_version[128];
209 int fw_ver_major;
210 int fw_ver_minor;
211 int fw_ver_tiny;
212 int adopted_rx_filter_bug;
213 u8 mac_addr[6]; /* eeprom mac address */
214 unsigned long serial_number;
215 int vendor_specific_offset;
216 int fw_multicast_support;
217 unsigned long features;
218 u32 max_tso6;
219 u32 read_dma;
220 u32 write_dma;
221 u32 read_write_dma;
222 u32 link_changes;
223 u32 msg_enable;
224 };
225
226 static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
227 static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
228
229 static char *myri10ge_fw_name = NULL;
230 module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR);
231 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name\n");
232
233 static int myri10ge_ecrc_enable = 1;
234 module_param(myri10ge_ecrc_enable, int, S_IRUGO);
235 MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E\n");
236
237 static int myri10ge_max_intr_slots = 1024;
238 module_param(myri10ge_max_intr_slots, int, S_IRUGO);
239 MODULE_PARM_DESC(myri10ge_max_intr_slots, "Interrupt queue slots\n");
240
241 static int myri10ge_small_bytes = -1; /* -1 == auto */
242 module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR);
243 MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets\n");
244
245 static int myri10ge_msi = 1; /* enable msi by default */
246 module_param(myri10ge_msi, int, S_IRUGO | S_IWUSR);
247 MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts\n");
248
249 static int myri10ge_intr_coal_delay = 75;
250 module_param(myri10ge_intr_coal_delay, int, S_IRUGO);
251 MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay\n");
252
253 static int myri10ge_flow_control = 1;
254 module_param(myri10ge_flow_control, int, S_IRUGO);
255 MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter\n");
256
257 static int myri10ge_deassert_wait = 1;
258 module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR);
259 MODULE_PARM_DESC(myri10ge_deassert_wait,
260 "Wait when deasserting legacy interrupts\n");
261
262 static int myri10ge_force_firmware = 0;
263 module_param(myri10ge_force_firmware, int, S_IRUGO);
264 MODULE_PARM_DESC(myri10ge_force_firmware,
265 "Force firmware to assume aligned completions\n");
266
267 static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
268 module_param(myri10ge_initial_mtu, int, S_IRUGO);
269 MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU\n");
270
271 static int myri10ge_napi_weight = 64;
272 module_param(myri10ge_napi_weight, int, S_IRUGO);
273 MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight\n");
274
275 static int myri10ge_watchdog_timeout = 1;
276 module_param(myri10ge_watchdog_timeout, int, S_IRUGO);
277 MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout\n");
278
279 static int myri10ge_max_irq_loops = 1048576;
280 module_param(myri10ge_max_irq_loops, int, S_IRUGO);
281 MODULE_PARM_DESC(myri10ge_max_irq_loops,
282 "Set stuck legacy IRQ detection threshold\n");
283
284 #define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK
285
286 static int myri10ge_debug = -1; /* defaults above */
287 module_param(myri10ge_debug, int, 0);
288 MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)");
289
290 static int myri10ge_lro = 1;
291 module_param(myri10ge_lro, int, S_IRUGO);
292 MODULE_PARM_DESC(myri10ge_lro, "Enable large receive offload\n");
293
294 static int myri10ge_lro_max_pkts = MYRI10GE_LRO_MAX_PKTS;
295 module_param(myri10ge_lro_max_pkts, int, S_IRUGO);
296 MODULE_PARM_DESC(myri10ge_lro, "Number of LRO packets to be aggregated\n");
297
298 static int myri10ge_fill_thresh = 256;
299 module_param(myri10ge_fill_thresh, int, S_IRUGO | S_IWUSR);
300 MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed\n");
301
302 static int myri10ge_reset_recover = 1;
303
304 static int myri10ge_wcfifo = 0;
305 module_param(myri10ge_wcfifo, int, S_IRUGO);
306 MODULE_PARM_DESC(myri10ge_wcfifo, "Enable WC Fifo when WC is enabled\n");
307
308 #define MYRI10GE_FW_OFFSET 1024*1024
309 #define MYRI10GE_HIGHPART_TO_U32(X) \
310 (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0)
311 #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X))
312
313 #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8)
314
315 static void myri10ge_set_multicast_list(struct net_device *dev);
316 static int myri10ge_sw_tso(struct sk_buff *skb, struct net_device *dev);
317
318 static inline void put_be32(__be32 val, __be32 __iomem * p)
319 {
320 __raw_writel((__force __u32) val, (__force void __iomem *)p);
321 }
322
323 static int
324 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
325 struct myri10ge_cmd *data, int atomic)
326 {
327 struct mcp_cmd *buf;
328 char buf_bytes[sizeof(*buf) + 8];
329 struct mcp_cmd_response *response = mgp->cmd;
330 char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD;
331 u32 dma_low, dma_high, result, value;
332 int sleep_total = 0;
333
334 /* ensure buf is aligned to 8 bytes */
335 buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8);
336
337 buf->data0 = htonl(data->data0);
338 buf->data1 = htonl(data->data1);
339 buf->data2 = htonl(data->data2);
340 buf->cmd = htonl(cmd);
341 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
342 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
343
344 buf->response_addr.low = htonl(dma_low);
345 buf->response_addr.high = htonl(dma_high);
346 response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT);
347 mb();
348 myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf));
349
350 /* wait up to 15ms. Longest command is the DMA benchmark,
351 * which is capped at 5ms, but runs from a timeout handler
352 * that runs every 7.8ms. So a 15ms timeout leaves us with
353 * a 2.2ms margin
354 */
355 if (atomic) {
356 /* if atomic is set, do not sleep,
357 * and try to get the completion quickly
358 * (1ms will be enough for those commands) */
359 for (sleep_total = 0;
360 sleep_total < 1000
361 && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
362 sleep_total += 10)
363 udelay(10);
364 } else {
365 /* use msleep for most command */
366 for (sleep_total = 0;
367 sleep_total < 15
368 && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
369 sleep_total++)
370 msleep(1);
371 }
372
373 result = ntohl(response->result);
374 value = ntohl(response->data);
375 if (result != MYRI10GE_NO_RESPONSE_RESULT) {
376 if (result == 0) {
377 data->data0 = value;
378 return 0;
379 } else if (result == MXGEFW_CMD_UNKNOWN) {
380 return -ENOSYS;
381 } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) {
382 return -E2BIG;
383 } else {
384 dev_err(&mgp->pdev->dev,
385 "command %d failed, result = %d\n",
386 cmd, result);
387 return -ENXIO;
388 }
389 }
390
391 dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
392 cmd, result);
393 return -EAGAIN;
394 }
395
396 /*
397 * The eeprom strings on the lanaiX have the format
398 * SN=x\0
399 * MAC=x:x:x:x:x:x\0
400 * PT:ddd mmm xx xx:xx:xx xx\0
401 * PV:ddd mmm xx xx:xx:xx xx\0
402 */
403 static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp)
404 {
405 char *ptr, *limit;
406 int i;
407
408 ptr = mgp->eeprom_strings;
409 limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE;
410
411 while (*ptr != '\0' && ptr < limit) {
412 if (memcmp(ptr, "MAC=", 4) == 0) {
413 ptr += 4;
414 mgp->mac_addr_string = ptr;
415 for (i = 0; i < 6; i++) {
416 if ((ptr + 2) > limit)
417 goto abort;
418 mgp->mac_addr[i] =
419 simple_strtoul(ptr, &ptr, 16);
420 ptr += 1;
421 }
422 }
423 if (memcmp((const void *)ptr, "SN=", 3) == 0) {
424 ptr += 3;
425 mgp->serial_number = simple_strtoul(ptr, &ptr, 10);
426 }
427 while (ptr < limit && *ptr++) ;
428 }
429
430 return 0;
431
432 abort:
433 dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n");
434 return -ENXIO;
435 }
436
437 /*
438 * Enable or disable periodic RDMAs from the host to make certain
439 * chipsets resend dropped PCIe messages
440 */
441
442 static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable)
443 {
444 char __iomem *submit;
445 __be32 buf[16];
446 u32 dma_low, dma_high;
447 int i;
448
449 /* clear confirmation addr */
450 mgp->cmd->data = 0;
451 mb();
452
453 /* send a rdma command to the PCIe engine, and wait for the
454 * response in the confirmation address. The firmware should
455 * write a -1 there to indicate it is alive and well
456 */
457 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
458 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
459
460 buf[0] = htonl(dma_high); /* confirm addr MSW */
461 buf[1] = htonl(dma_low); /* confirm addr LSW */
462 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */
463 buf[3] = htonl(dma_high); /* dummy addr MSW */
464 buf[4] = htonl(dma_low); /* dummy addr LSW */
465 buf[5] = htonl(enable); /* enable? */
466
467 submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA;
468
469 myri10ge_pio_copy(submit, &buf, sizeof(buf));
470 for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++)
471 msleep(1);
472 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA)
473 dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n",
474 (enable ? "enable" : "disable"));
475 }
476
477 static int
478 myri10ge_validate_firmware(struct myri10ge_priv *mgp,
479 struct mcp_gen_header *hdr)
480 {
481 struct device *dev = &mgp->pdev->dev;
482
483 /* check firmware type */
484 if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) {
485 dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type));
486 return -EINVAL;
487 }
488
489 /* save firmware version for ethtool */
490 strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
491
492 sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major,
493 &mgp->fw_ver_minor, &mgp->fw_ver_tiny);
494
495 if (!(mgp->fw_ver_major == MXGEFW_VERSION_MAJOR
496 && mgp->fw_ver_minor == MXGEFW_VERSION_MINOR)) {
497 dev_err(dev, "Found firmware version %s\n", mgp->fw_version);
498 dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR,
499 MXGEFW_VERSION_MINOR);
500 return -EINVAL;
501 }
502 return 0;
503 }
504
505 static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
506 {
507 unsigned crc, reread_crc;
508 const struct firmware *fw;
509 struct device *dev = &mgp->pdev->dev;
510 struct mcp_gen_header *hdr;
511 size_t hdr_offset;
512 int status;
513 unsigned i;
514
515 if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) {
516 dev_err(dev, "Unable to load %s firmware image via hotplug\n",
517 mgp->fw_name);
518 status = -EINVAL;
519 goto abort_with_nothing;
520 }
521
522 /* check size */
523
524 if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET ||
525 fw->size < MCP_HEADER_PTR_OFFSET + 4) {
526 dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size);
527 status = -EINVAL;
528 goto abort_with_fw;
529 }
530
531 /* check id */
532 hdr_offset = ntohl(*(__be32 *) (fw->data + MCP_HEADER_PTR_OFFSET));
533 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) {
534 dev_err(dev, "Bad firmware file\n");
535 status = -EINVAL;
536 goto abort_with_fw;
537 }
538 hdr = (void *)(fw->data + hdr_offset);
539
540 status = myri10ge_validate_firmware(mgp, hdr);
541 if (status != 0)
542 goto abort_with_fw;
543
544 crc = crc32(~0, fw->data, fw->size);
545 for (i = 0; i < fw->size; i += 256) {
546 myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i,
547 fw->data + i,
548 min(256U, (unsigned)(fw->size - i)));
549 mb();
550 readb(mgp->sram);
551 }
552 /* corruption checking is good for parity recovery and buggy chipset */
553 memcpy_fromio(fw->data, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);
554 reread_crc = crc32(~0, fw->data, fw->size);
555 if (crc != reread_crc) {
556 dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n",
557 (unsigned)fw->size, reread_crc, crc);
558 status = -EIO;
559 goto abort_with_fw;
560 }
561 *size = (u32) fw->size;
562
563 abort_with_fw:
564 release_firmware(fw);
565
566 abort_with_nothing:
567 return status;
568 }
569
570 static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp)
571 {
572 struct mcp_gen_header *hdr;
573 struct device *dev = &mgp->pdev->dev;
574 const size_t bytes = sizeof(struct mcp_gen_header);
575 size_t hdr_offset;
576 int status;
577
578 /* find running firmware header */
579 hdr_offset = ntohl(__raw_readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
580
581 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) {
582 dev_err(dev, "Running firmware has bad header offset (%d)\n",
583 (int)hdr_offset);
584 return -EIO;
585 }
586
587 /* copy header of running firmware from SRAM to host memory to
588 * validate firmware */
589 hdr = kmalloc(bytes, GFP_KERNEL);
590 if (hdr == NULL) {
591 dev_err(dev, "could not malloc firmware hdr\n");
592 return -ENOMEM;
593 }
594 memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes);
595 status = myri10ge_validate_firmware(mgp, hdr);
596 kfree(hdr);
597
598 /* check to see if adopted firmware has bug where adopting
599 * it will cause broadcasts to be filtered unless the NIC
600 * is kept in ALLMULTI mode */
601 if (mgp->fw_ver_major == 1 && mgp->fw_ver_minor == 4 &&
602 mgp->fw_ver_tiny >= 4 && mgp->fw_ver_tiny <= 11) {
603 mgp->adopted_rx_filter_bug = 1;
604 dev_warn(dev, "Adopting fw %d.%d.%d: "
605 "working around rx filter bug\n",
606 mgp->fw_ver_major, mgp->fw_ver_minor,
607 mgp->fw_ver_tiny);
608 }
609 return status;
610 }
611
612 static int myri10ge_load_firmware(struct myri10ge_priv *mgp)
613 {
614 char __iomem *submit;
615 __be32 buf[16];
616 u32 dma_low, dma_high, size;
617 int status, i;
618 struct myri10ge_cmd cmd;
619
620 size = 0;
621 status = myri10ge_load_hotplug_firmware(mgp, &size);
622 if (status) {
623 dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n");
624
625 /* Do not attempt to adopt firmware if there
626 * was a bad crc */
627 if (status == -EIO)
628 return status;
629
630 status = myri10ge_adopt_running_firmware(mgp);
631 if (status != 0) {
632 dev_err(&mgp->pdev->dev,
633 "failed to adopt running firmware\n");
634 return status;
635 }
636 dev_info(&mgp->pdev->dev,
637 "Successfully adopted running firmware\n");
638 if (mgp->tx.boundary == 4096) {
639 dev_warn(&mgp->pdev->dev,
640 "Using firmware currently running on NIC"
641 ". For optimal\n");
642 dev_warn(&mgp->pdev->dev,
643 "performance consider loading optimized "
644 "firmware\n");
645 dev_warn(&mgp->pdev->dev, "via hotplug\n");
646 }
647
648 mgp->fw_name = "adopted";
649 mgp->tx.boundary = 2048;
650 return status;
651 }
652
653 /* clear confirmation addr */
654 mgp->cmd->data = 0;
655 mb();
656
657 /* send a reload command to the bootstrap MCP, and wait for the
658 * response in the confirmation address. The firmware should
659 * write a -1 there to indicate it is alive and well
660 */
661 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
662 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
663
664 buf[0] = htonl(dma_high); /* confirm addr MSW */
665 buf[1] = htonl(dma_low); /* confirm addr LSW */
666 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */
667
668 /* FIX: All newest firmware should un-protect the bottom of
669 * the sram before handoff. However, the very first interfaces
670 * do not. Therefore the handoff copy must skip the first 8 bytes
671 */
672 buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */
673 buf[4] = htonl(size - 8); /* length of code */
674 buf[5] = htonl(8); /* where to copy to */
675 buf[6] = htonl(0); /* where to jump to */
676
677 submit = mgp->sram + MXGEFW_BOOT_HANDOFF;
678
679 myri10ge_pio_copy(submit, &buf, sizeof(buf));
680 mb();
681 msleep(1);
682 mb();
683 i = 0;
684 while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20) {
685 msleep(1);
686 i++;
687 }
688 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) {
689 dev_err(&mgp->pdev->dev, "handoff failed\n");
690 return -ENXIO;
691 }
692 dev_info(&mgp->pdev->dev, "handoff confirmed\n");
693 myri10ge_dummy_rdma(mgp, 1);
694
695 /* probe for IPv6 TSO support */
696 mgp->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
697 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_TSO6_HDR_SIZE,
698 &cmd, 0);
699 if (status == 0) {
700 mgp->max_tso6 = cmd.data0;
701 mgp->features |= NETIF_F_TSO6;
702 }
703 return 0;
704 }
705
706 static int myri10ge_update_mac_address(struct myri10ge_priv *mgp, u8 * addr)
707 {
708 struct myri10ge_cmd cmd;
709 int status;
710
711 cmd.data0 = ((addr[0] << 24) | (addr[1] << 16)
712 | (addr[2] << 8) | addr[3]);
713
714 cmd.data1 = ((addr[4] << 8) | (addr[5]));
715
716 status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0);
717 return status;
718 }
719
720 static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause)
721 {
722 struct myri10ge_cmd cmd;
723 int status, ctl;
724
725 ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL;
726 status = myri10ge_send_cmd(mgp, ctl, &cmd, 0);
727
728 if (status) {
729 printk(KERN_ERR
730 "myri10ge: %s: Failed to set flow control mode\n",
731 mgp->dev->name);
732 return status;
733 }
734 mgp->pause = pause;
735 return 0;
736 }
737
738 static void
739 myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic)
740 {
741 struct myri10ge_cmd cmd;
742 int status, ctl;
743
744 ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC;
745 status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic);
746 if (status)
747 printk(KERN_ERR "myri10ge: %s: Failed to set promisc mode\n",
748 mgp->dev->name);
749 }
750
751 static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type)
752 {
753 struct myri10ge_cmd cmd;
754 int status;
755 u32 len;
756 struct page *dmatest_page;
757 dma_addr_t dmatest_bus;
758 char *test = " ";
759
760 dmatest_page = alloc_page(GFP_KERNEL);
761 if (!dmatest_page)
762 return -ENOMEM;
763 dmatest_bus = pci_map_page(mgp->pdev, dmatest_page, 0, PAGE_SIZE,
764 DMA_BIDIRECTIONAL);
765
766 /* Run a small DMA test.
767 * The magic multipliers to the length tell the firmware
768 * to do DMA read, write, or read+write tests. The
769 * results are returned in cmd.data0. The upper 16
770 * bits or the return is the number of transfers completed.
771 * The lower 16 bits is the time in 0.5us ticks that the
772 * transfers took to complete.
773 */
774
775 len = mgp->tx.boundary;
776
777 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
778 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
779 cmd.data2 = len * 0x10000;
780 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
781 if (status != 0) {
782 test = "read";
783 goto abort;
784 }
785 mgp->read_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
786 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
787 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
788 cmd.data2 = len * 0x1;
789 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
790 if (status != 0) {
791 test = "write";
792 goto abort;
793 }
794 mgp->write_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
795
796 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
797 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
798 cmd.data2 = len * 0x10001;
799 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
800 if (status != 0) {
801 test = "read/write";
802 goto abort;
803 }
804 mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) /
805 (cmd.data0 & 0xffff);
806
807 abort:
808 pci_unmap_page(mgp->pdev, dmatest_bus, PAGE_SIZE, DMA_BIDIRECTIONAL);
809 put_page(dmatest_page);
810
811 if (status != 0 && test_type != MXGEFW_CMD_UNALIGNED_TEST)
812 dev_warn(&mgp->pdev->dev, "DMA %s benchmark failed: %d\n",
813 test, status);
814
815 return status;
816 }
817
818 static int myri10ge_reset(struct myri10ge_priv *mgp)
819 {
820 struct myri10ge_cmd cmd;
821 int status;
822 size_t bytes;
823
824 /* try to send a reset command to the card to see if it
825 * is alive */
826 memset(&cmd, 0, sizeof(cmd));
827 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
828 if (status != 0) {
829 dev_err(&mgp->pdev->dev, "failed reset\n");
830 return -ENXIO;
831 }
832
833 (void)myri10ge_dma_test(mgp, MXGEFW_DMA_TEST);
834
835 /* Now exchange information about interrupts */
836
837 bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
838 memset(mgp->rx_done.entry, 0, bytes);
839 cmd.data0 = (u32) bytes;
840 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
841 cmd.data0 = MYRI10GE_LOWPART_TO_U32(mgp->rx_done.bus);
842 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(mgp->rx_done.bus);
843 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA, &cmd, 0);
844
845 status |=
846 myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0);
847 mgp->irq_claim = (__iomem __be32 *) (mgp->sram + cmd.data0);
848 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET,
849 &cmd, 0);
850 mgp->irq_deassert = (__iomem __be32 *) (mgp->sram + cmd.data0);
851
852 status |= myri10ge_send_cmd
853 (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0);
854 mgp->intr_coal_delay_ptr = (__iomem __be32 *) (mgp->sram + cmd.data0);
855 if (status != 0) {
856 dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n");
857 return status;
858 }
859 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
860
861 memset(mgp->rx_done.entry, 0, bytes);
862
863 /* reset mcp/driver shared state back to 0 */
864 mgp->tx.req = 0;
865 mgp->tx.done = 0;
866 mgp->tx.pkt_start = 0;
867 mgp->tx.pkt_done = 0;
868 mgp->rx_big.cnt = 0;
869 mgp->rx_small.cnt = 0;
870 mgp->rx_done.idx = 0;
871 mgp->rx_done.cnt = 0;
872 mgp->link_changes = 0;
873 status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr);
874 myri10ge_change_pause(mgp, mgp->pause);
875 myri10ge_set_multicast_list(mgp->dev);
876 return status;
877 }
878
879 static inline void
880 myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst,
881 struct mcp_kreq_ether_recv *src)
882 {
883 __be32 low;
884
885 low = src->addr_low;
886 src->addr_low = htonl(DMA_32BIT_MASK);
887 myri10ge_pio_copy(dst, src, 4 * sizeof(*src));
888 mb();
889 myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src));
890 mb();
891 src->addr_low = low;
892 put_be32(low, &dst->addr_low);
893 mb();
894 }
895
896 static inline void myri10ge_vlan_ip_csum(struct sk_buff *skb, __wsum hw_csum)
897 {
898 struct vlan_hdr *vh = (struct vlan_hdr *)(skb->data);
899
900 if ((skb->protocol == htons(ETH_P_8021Q)) &&
901 (vh->h_vlan_encapsulated_proto == htons(ETH_P_IP) ||
902 vh->h_vlan_encapsulated_proto == htons(ETH_P_IPV6))) {
903 skb->csum = hw_csum;
904 skb->ip_summed = CHECKSUM_COMPLETE;
905 }
906 }
907
908 static inline void
909 myri10ge_rx_skb_build(struct sk_buff *skb, u8 * va,
910 struct skb_frag_struct *rx_frags, int len, int hlen)
911 {
912 struct skb_frag_struct *skb_frags;
913
914 skb->len = skb->data_len = len;
915 skb->truesize = len + sizeof(struct sk_buff);
916 /* attach the page(s) */
917
918 skb_frags = skb_shinfo(skb)->frags;
919 while (len > 0) {
920 memcpy(skb_frags, rx_frags, sizeof(*skb_frags));
921 len -= rx_frags->size;
922 skb_frags++;
923 rx_frags++;
924 skb_shinfo(skb)->nr_frags++;
925 }
926
927 /* pskb_may_pull is not available in irq context, but
928 * skb_pull() (for ether_pad and eth_type_trans()) requires
929 * the beginning of the packet in skb_headlen(), move it
930 * manually */
931 skb_copy_to_linear_data(skb, va, hlen);
932 skb_shinfo(skb)->frags[0].page_offset += hlen;
933 skb_shinfo(skb)->frags[0].size -= hlen;
934 skb->data_len -= hlen;
935 skb->tail += hlen;
936 skb_pull(skb, MXGEFW_PAD);
937 }
938
939 static void
940 myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
941 int bytes, int watchdog)
942 {
943 struct page *page;
944 int idx;
945
946 if (unlikely(rx->watchdog_needed && !watchdog))
947 return;
948
949 /* try to refill entire ring */
950 while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) {
951 idx = rx->fill_cnt & rx->mask;
952 if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) {
953 /* we can use part of previous page */
954 get_page(rx->page);
955 } else {
956 /* we need a new page */
957 page =
958 alloc_pages(GFP_ATOMIC | __GFP_COMP,
959 MYRI10GE_ALLOC_ORDER);
960 if (unlikely(page == NULL)) {
961 if (rx->fill_cnt - rx->cnt < 16)
962 rx->watchdog_needed = 1;
963 return;
964 }
965 rx->page = page;
966 rx->page_offset = 0;
967 rx->bus = pci_map_page(mgp->pdev, page, 0,
968 MYRI10GE_ALLOC_SIZE,
969 PCI_DMA_FROMDEVICE);
970 }
971 rx->info[idx].page = rx->page;
972 rx->info[idx].page_offset = rx->page_offset;
973 /* note that this is the address of the start of the
974 * page */
975 pci_unmap_addr_set(&rx->info[idx], bus, rx->bus);
976 rx->shadow[idx].addr_low =
977 htonl(MYRI10GE_LOWPART_TO_U32(rx->bus) + rx->page_offset);
978 rx->shadow[idx].addr_high =
979 htonl(MYRI10GE_HIGHPART_TO_U32(rx->bus));
980
981 /* start next packet on a cacheline boundary */
982 rx->page_offset += SKB_DATA_ALIGN(bytes);
983
984 #if MYRI10GE_ALLOC_SIZE > 4096
985 /* don't cross a 4KB boundary */
986 if ((rx->page_offset >> 12) !=
987 ((rx->page_offset + bytes - 1) >> 12))
988 rx->page_offset = (rx->page_offset + 4096) & ~4095;
989 #endif
990 rx->fill_cnt++;
991
992 /* copy 8 descriptors to the firmware at a time */
993 if ((idx & 7) == 7) {
994 if (rx->wc_fifo == NULL)
995 myri10ge_submit_8rx(&rx->lanai[idx - 7],
996 &rx->shadow[idx - 7]);
997 else {
998 mb();
999 myri10ge_pio_copy(rx->wc_fifo,
1000 &rx->shadow[idx - 7], 64);
1001 }
1002 }
1003 }
1004 }
1005
1006 static inline void
1007 myri10ge_unmap_rx_page(struct pci_dev *pdev,
1008 struct myri10ge_rx_buffer_state *info, int bytes)
1009 {
1010 /* unmap the recvd page if we're the only or last user of it */
1011 if (bytes >= MYRI10GE_ALLOC_SIZE / 2 ||
1012 (info->page_offset + 2 * bytes) > MYRI10GE_ALLOC_SIZE) {
1013 pci_unmap_page(pdev, (pci_unmap_addr(info, bus)
1014 & ~(MYRI10GE_ALLOC_SIZE - 1)),
1015 MYRI10GE_ALLOC_SIZE, PCI_DMA_FROMDEVICE);
1016 }
1017 }
1018
1019 #define MYRI10GE_HLEN 64 /* The number of bytes to copy from a
1020 * page into an skb */
1021
1022 static inline int
1023 myri10ge_rx_done(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
1024 int bytes, int len, __wsum csum)
1025 {
1026 struct sk_buff *skb;
1027 struct skb_frag_struct rx_frags[MYRI10GE_MAX_FRAGS_PER_FRAME];
1028 int i, idx, hlen, remainder;
1029 struct pci_dev *pdev = mgp->pdev;
1030 struct net_device *dev = mgp->dev;
1031 u8 *va;
1032
1033 len += MXGEFW_PAD;
1034 idx = rx->cnt & rx->mask;
1035 va = page_address(rx->info[idx].page) + rx->info[idx].page_offset;
1036 prefetch(va);
1037 /* Fill skb_frag_struct(s) with data from our receive */
1038 for (i = 0, remainder = len; remainder > 0; i++) {
1039 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1040 rx_frags[i].page = rx->info[idx].page;
1041 rx_frags[i].page_offset = rx->info[idx].page_offset;
1042 if (remainder < MYRI10GE_ALLOC_SIZE)
1043 rx_frags[i].size = remainder;
1044 else
1045 rx_frags[i].size = MYRI10GE_ALLOC_SIZE;
1046 rx->cnt++;
1047 idx = rx->cnt & rx->mask;
1048 remainder -= MYRI10GE_ALLOC_SIZE;
1049 }
1050
1051 if (mgp->csum_flag && myri10ge_lro) {
1052 rx_frags[0].page_offset += MXGEFW_PAD;
1053 rx_frags[0].size -= MXGEFW_PAD;
1054 len -= MXGEFW_PAD;
1055 lro_receive_frags(&mgp->rx_done.lro_mgr, rx_frags,
1056 len, len, (void *)(unsigned long)csum, csum);
1057 return 1;
1058 }
1059
1060 hlen = MYRI10GE_HLEN > len ? len : MYRI10GE_HLEN;
1061
1062 /* allocate an skb to attach the page(s) to. This is done
1063 * after trying LRO, so as to avoid skb allocation overheads */
1064
1065 skb = netdev_alloc_skb(dev, MYRI10GE_HLEN + 16);
1066 if (unlikely(skb == NULL)) {
1067 mgp->stats.rx_dropped++;
1068 do {
1069 i--;
1070 put_page(rx_frags[i].page);
1071 } while (i != 0);
1072 return 0;
1073 }
1074
1075 /* Attach the pages to the skb, and trim off any padding */
1076 myri10ge_rx_skb_build(skb, va, rx_frags, len, hlen);
1077 if (skb_shinfo(skb)->frags[0].size <= 0) {
1078 put_page(skb_shinfo(skb)->frags[0].page);
1079 skb_shinfo(skb)->nr_frags = 0;
1080 }
1081 skb->protocol = eth_type_trans(skb, dev);
1082
1083 if (mgp->csum_flag) {
1084 if ((skb->protocol == htons(ETH_P_IP)) ||
1085 (skb->protocol == htons(ETH_P_IPV6))) {
1086 skb->csum = csum;
1087 skb->ip_summed = CHECKSUM_COMPLETE;
1088 } else
1089 myri10ge_vlan_ip_csum(skb, csum);
1090 }
1091 netif_receive_skb(skb);
1092 dev->last_rx = jiffies;
1093 return 1;
1094 }
1095
1096 static inline void myri10ge_tx_done(struct myri10ge_priv *mgp, int mcp_index)
1097 {
1098 struct pci_dev *pdev = mgp->pdev;
1099 struct myri10ge_tx_buf *tx = &mgp->tx;
1100 struct sk_buff *skb;
1101 int idx, len;
1102
1103 while (tx->pkt_done != mcp_index) {
1104 idx = tx->done & tx->mask;
1105 skb = tx->info[idx].skb;
1106
1107 /* Mark as free */
1108 tx->info[idx].skb = NULL;
1109 if (tx->info[idx].last) {
1110 tx->pkt_done++;
1111 tx->info[idx].last = 0;
1112 }
1113 tx->done++;
1114 len = pci_unmap_len(&tx->info[idx], len);
1115 pci_unmap_len_set(&tx->info[idx], len, 0);
1116 if (skb) {
1117 mgp->stats.tx_bytes += skb->len;
1118 mgp->stats.tx_packets++;
1119 dev_kfree_skb_irq(skb);
1120 if (len)
1121 pci_unmap_single(pdev,
1122 pci_unmap_addr(&tx->info[idx],
1123 bus), len,
1124 PCI_DMA_TODEVICE);
1125 } else {
1126 if (len)
1127 pci_unmap_page(pdev,
1128 pci_unmap_addr(&tx->info[idx],
1129 bus), len,
1130 PCI_DMA_TODEVICE);
1131 }
1132 }
1133 /* start the queue if we've stopped it */
1134 if (netif_queue_stopped(mgp->dev)
1135 && tx->req - tx->done < (tx->mask >> 1)) {
1136 mgp->wake_queue++;
1137 netif_wake_queue(mgp->dev);
1138 }
1139 }
1140
1141 static inline int myri10ge_clean_rx_done(struct myri10ge_priv *mgp, int budget)
1142 {
1143 struct myri10ge_rx_done *rx_done = &mgp->rx_done;
1144 unsigned long rx_bytes = 0;
1145 unsigned long rx_packets = 0;
1146 unsigned long rx_ok;
1147
1148 int idx = rx_done->idx;
1149 int cnt = rx_done->cnt;
1150 int work_done = 0;
1151 u16 length;
1152 __wsum checksum;
1153
1154 while (rx_done->entry[idx].length != 0 && work_done++ < budget) {
1155 length = ntohs(rx_done->entry[idx].length);
1156 rx_done->entry[idx].length = 0;
1157 checksum = csum_unfold(rx_done->entry[idx].checksum);
1158 if (length <= mgp->small_bytes)
1159 rx_ok = myri10ge_rx_done(mgp, &mgp->rx_small,
1160 mgp->small_bytes,
1161 length, checksum);
1162 else
1163 rx_ok = myri10ge_rx_done(mgp, &mgp->rx_big,
1164 mgp->big_bytes,
1165 length, checksum);
1166 rx_packets += rx_ok;
1167 rx_bytes += rx_ok * (unsigned long)length;
1168 cnt++;
1169 idx = cnt & (myri10ge_max_intr_slots - 1);
1170 }
1171 rx_done->idx = idx;
1172 rx_done->cnt = cnt;
1173 mgp->stats.rx_packets += rx_packets;
1174 mgp->stats.rx_bytes += rx_bytes;
1175
1176 if (myri10ge_lro)
1177 lro_flush_all(&rx_done->lro_mgr);
1178
1179 /* restock receive rings if needed */
1180 if (mgp->rx_small.fill_cnt - mgp->rx_small.cnt < myri10ge_fill_thresh)
1181 myri10ge_alloc_rx_pages(mgp, &mgp->rx_small,
1182 mgp->small_bytes + MXGEFW_PAD, 0);
1183 if (mgp->rx_big.fill_cnt - mgp->rx_big.cnt < myri10ge_fill_thresh)
1184 myri10ge_alloc_rx_pages(mgp, &mgp->rx_big, mgp->big_bytes, 0);
1185
1186 return work_done;
1187 }
1188
1189 static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
1190 {
1191 struct mcp_irq_data *stats = mgp->fw_stats;
1192
1193 if (unlikely(stats->stats_updated)) {
1194 unsigned link_up = ntohl(stats->link_up);
1195 if (mgp->link_state != link_up) {
1196 mgp->link_state = link_up;
1197
1198 if (mgp->link_state == MXGEFW_LINK_UP) {
1199 if (netif_msg_link(mgp))
1200 printk(KERN_INFO
1201 "myri10ge: %s: link up\n",
1202 mgp->dev->name);
1203 netif_carrier_on(mgp->dev);
1204 mgp->link_changes++;
1205 } else {
1206 if (netif_msg_link(mgp))
1207 printk(KERN_INFO
1208 "myri10ge: %s: link %s\n",
1209 mgp->dev->name,
1210 (link_up == MXGEFW_LINK_MYRINET ?
1211 "mismatch (Myrinet detected)" :
1212 "down"));
1213 netif_carrier_off(mgp->dev);
1214 mgp->link_changes++;
1215 }
1216 }
1217 if (mgp->rdma_tags_available !=
1218 ntohl(mgp->fw_stats->rdma_tags_available)) {
1219 mgp->rdma_tags_available =
1220 ntohl(mgp->fw_stats->rdma_tags_available);
1221 printk(KERN_WARNING "myri10ge: %s: RDMA timed out! "
1222 "%d tags left\n", mgp->dev->name,
1223 mgp->rdma_tags_available);
1224 }
1225 mgp->down_cnt += stats->link_down;
1226 if (stats->link_down)
1227 wake_up(&mgp->down_wq);
1228 }
1229 }
1230
1231 static int myri10ge_poll(struct napi_struct *napi, int budget)
1232 {
1233 struct myri10ge_priv *mgp =
1234 container_of(napi, struct myri10ge_priv, napi);
1235 struct net_device *netdev = mgp->dev;
1236 struct myri10ge_rx_done *rx_done = &mgp->rx_done;
1237 int work_done;
1238
1239 /* process as many rx events as NAPI will allow */
1240 work_done = myri10ge_clean_rx_done(mgp, budget);
1241
1242 if (rx_done->entry[rx_done->idx].length == 0 || !netif_running(netdev)) {
1243 netif_rx_complete(netdev, napi);
1244 put_be32(htonl(3), mgp->irq_claim);
1245 }
1246 return work_done;
1247 }
1248
1249 static irqreturn_t myri10ge_intr(int irq, void *arg)
1250 {
1251 struct myri10ge_priv *mgp = arg;
1252 struct mcp_irq_data *stats = mgp->fw_stats;
1253 struct myri10ge_tx_buf *tx = &mgp->tx;
1254 u32 send_done_count;
1255 int i;
1256
1257 /* make sure it is our IRQ, and that the DMA has finished */
1258 if (unlikely(!stats->valid))
1259 return (IRQ_NONE);
1260
1261 /* low bit indicates receives are present, so schedule
1262 * napi poll handler */
1263 if (stats->valid & 1)
1264 netif_rx_schedule(mgp->dev, &mgp->napi);
1265
1266 if (!mgp->msi_enabled) {
1267 put_be32(0, mgp->irq_deassert);
1268 if (!myri10ge_deassert_wait)
1269 stats->valid = 0;
1270 mb();
1271 } else
1272 stats->valid = 0;
1273
1274 /* Wait for IRQ line to go low, if using INTx */
1275 i = 0;
1276 while (1) {
1277 i++;
1278 /* check for transmit completes and receives */
1279 send_done_count = ntohl(stats->send_done_count);
1280 if (send_done_count != tx->pkt_done)
1281 myri10ge_tx_done(mgp, (int)send_done_count);
1282 if (unlikely(i > myri10ge_max_irq_loops)) {
1283 printk(KERN_WARNING "myri10ge: %s: irq stuck?\n",
1284 mgp->dev->name);
1285 stats->valid = 0;
1286 schedule_work(&mgp->watchdog_work);
1287 }
1288 if (likely(stats->valid == 0))
1289 break;
1290 cpu_relax();
1291 barrier();
1292 }
1293
1294 myri10ge_check_statblock(mgp);
1295
1296 put_be32(htonl(3), mgp->irq_claim + 1);
1297 return (IRQ_HANDLED);
1298 }
1299
1300 static int
1301 myri10ge_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
1302 {
1303 cmd->autoneg = AUTONEG_DISABLE;
1304 cmd->speed = SPEED_10000;
1305 cmd->duplex = DUPLEX_FULL;
1306 return 0;
1307 }
1308
1309 static void
1310 myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
1311 {
1312 struct myri10ge_priv *mgp = netdev_priv(netdev);
1313
1314 strlcpy(info->driver, "myri10ge", sizeof(info->driver));
1315 strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version));
1316 strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version));
1317 strlcpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info));
1318 }
1319
1320 static int
1321 myri10ge_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1322 {
1323 struct myri10ge_priv *mgp = netdev_priv(netdev);
1324 coal->rx_coalesce_usecs = mgp->intr_coal_delay;
1325 return 0;
1326 }
1327
1328 static int
1329 myri10ge_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1330 {
1331 struct myri10ge_priv *mgp = netdev_priv(netdev);
1332
1333 mgp->intr_coal_delay = coal->rx_coalesce_usecs;
1334 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1335 return 0;
1336 }
1337
1338 static void
1339 myri10ge_get_pauseparam(struct net_device *netdev,
1340 struct ethtool_pauseparam *pause)
1341 {
1342 struct myri10ge_priv *mgp = netdev_priv(netdev);
1343
1344 pause->autoneg = 0;
1345 pause->rx_pause = mgp->pause;
1346 pause->tx_pause = mgp->pause;
1347 }
1348
1349 static int
1350 myri10ge_set_pauseparam(struct net_device *netdev,
1351 struct ethtool_pauseparam *pause)
1352 {
1353 struct myri10ge_priv *mgp = netdev_priv(netdev);
1354
1355 if (pause->tx_pause != mgp->pause)
1356 return myri10ge_change_pause(mgp, pause->tx_pause);
1357 if (pause->rx_pause != mgp->pause)
1358 return myri10ge_change_pause(mgp, pause->tx_pause);
1359 if (pause->autoneg != 0)
1360 return -EINVAL;
1361 return 0;
1362 }
1363
1364 static void
1365 myri10ge_get_ringparam(struct net_device *netdev,
1366 struct ethtool_ringparam *ring)
1367 {
1368 struct myri10ge_priv *mgp = netdev_priv(netdev);
1369
1370 ring->rx_mini_max_pending = mgp->rx_small.mask + 1;
1371 ring->rx_max_pending = mgp->rx_big.mask + 1;
1372 ring->rx_jumbo_max_pending = 0;
1373 ring->tx_max_pending = mgp->rx_small.mask + 1;
1374 ring->rx_mini_pending = ring->rx_mini_max_pending;
1375 ring->rx_pending = ring->rx_max_pending;
1376 ring->rx_jumbo_pending = ring->rx_jumbo_max_pending;
1377 ring->tx_pending = ring->tx_max_pending;
1378 }
1379
1380 static u32 myri10ge_get_rx_csum(struct net_device *netdev)
1381 {
1382 struct myri10ge_priv *mgp = netdev_priv(netdev);
1383 if (mgp->csum_flag)
1384 return 1;
1385 else
1386 return 0;
1387 }
1388
1389 static int myri10ge_set_rx_csum(struct net_device *netdev, u32 csum_enabled)
1390 {
1391 struct myri10ge_priv *mgp = netdev_priv(netdev);
1392 if (csum_enabled)
1393 mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
1394 else
1395 mgp->csum_flag = 0;
1396 return 0;
1397 }
1398
1399 static int myri10ge_set_tso(struct net_device *netdev, u32 tso_enabled)
1400 {
1401 struct myri10ge_priv *mgp = netdev_priv(netdev);
1402 unsigned long flags = mgp->features & (NETIF_F_TSO6 | NETIF_F_TSO);
1403
1404 if (tso_enabled)
1405 netdev->features |= flags;
1406 else
1407 netdev->features &= ~flags;
1408 return 0;
1409 }
1410
1411 static const char myri10ge_gstrings_stats[][ETH_GSTRING_LEN] = {
1412 "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
1413 "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
1414 "rx_length_errors", "rx_over_errors", "rx_crc_errors",
1415 "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
1416 "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
1417 "tx_heartbeat_errors", "tx_window_errors",
1418 /* device-specific stats */
1419 "tx_boundary", "WC", "irq", "MSI",
1420 "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
1421 "serial_number", "tx_pkt_start", "tx_pkt_done",
1422 "tx_req", "tx_done", "rx_small_cnt", "rx_big_cnt",
1423 "wake_queue", "stop_queue", "watchdog_resets", "tx_linearized",
1424 "link_changes", "link_up", "dropped_link_overflow",
1425 "dropped_link_error_or_filtered",
1426 "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32",
1427 "dropped_unicast_filtered", "dropped_multicast_filtered",
1428 "dropped_runt", "dropped_overrun", "dropped_no_small_buffer",
1429 "dropped_no_big_buffer", "LRO aggregated", "LRO flushed",
1430 "LRO avg aggr", "LRO no_desc"
1431 };
1432
1433 #define MYRI10GE_NET_STATS_LEN 21
1434 #define MYRI10GE_STATS_LEN sizeof(myri10ge_gstrings_stats) / ETH_GSTRING_LEN
1435
1436 static void
1437 myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
1438 {
1439 switch (stringset) {
1440 case ETH_SS_STATS:
1441 memcpy(data, *myri10ge_gstrings_stats,
1442 sizeof(myri10ge_gstrings_stats));
1443 break;
1444 }
1445 }
1446
1447 static int myri10ge_get_sset_count(struct net_device *netdev, int sset)
1448 {
1449 switch (sset) {
1450 case ETH_SS_STATS:
1451 return MYRI10GE_STATS_LEN;
1452 default:
1453 return -EOPNOTSUPP;
1454 }
1455 }
1456
1457 static void
1458 myri10ge_get_ethtool_stats(struct net_device *netdev,
1459 struct ethtool_stats *stats, u64 * data)
1460 {
1461 struct myri10ge_priv *mgp = netdev_priv(netdev);
1462 int i;
1463
1464 for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++)
1465 data[i] = ((unsigned long *)&mgp->stats)[i];
1466
1467 data[i++] = (unsigned int)mgp->tx.boundary;
1468 data[i++] = (unsigned int)mgp->wc_enabled;
1469 data[i++] = (unsigned int)mgp->pdev->irq;
1470 data[i++] = (unsigned int)mgp->msi_enabled;
1471 data[i++] = (unsigned int)mgp->read_dma;
1472 data[i++] = (unsigned int)mgp->write_dma;
1473 data[i++] = (unsigned int)mgp->read_write_dma;
1474 data[i++] = (unsigned int)mgp->serial_number;
1475 data[i++] = (unsigned int)mgp->tx.pkt_start;
1476 data[i++] = (unsigned int)mgp->tx.pkt_done;
1477 data[i++] = (unsigned int)mgp->tx.req;
1478 data[i++] = (unsigned int)mgp->tx.done;
1479 data[i++] = (unsigned int)mgp->rx_small.cnt;
1480 data[i++] = (unsigned int)mgp->rx_big.cnt;
1481 data[i++] = (unsigned int)mgp->wake_queue;
1482 data[i++] = (unsigned int)mgp->stop_queue;
1483 data[i++] = (unsigned int)mgp->watchdog_resets;
1484 data[i++] = (unsigned int)mgp->tx_linearized;
1485 data[i++] = (unsigned int)mgp->link_changes;
1486 data[i++] = (unsigned int)ntohl(mgp->fw_stats->link_up);
1487 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_link_overflow);
1488 data[i++] =
1489 (unsigned int)ntohl(mgp->fw_stats->dropped_link_error_or_filtered);
1490 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_pause);
1491 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_bad_phy);
1492 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_bad_crc32);
1493 data[i++] =
1494 (unsigned int)ntohl(mgp->fw_stats->dropped_unicast_filtered);
1495 data[i++] =
1496 (unsigned int)ntohl(mgp->fw_stats->dropped_multicast_filtered);
1497 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_runt);
1498 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_overrun);
1499 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_no_small_buffer);
1500 data[i++] = (unsigned int)ntohl(mgp->fw_stats->dropped_no_big_buffer);
1501 data[i++] = mgp->rx_done.lro_mgr.stats.aggregated;
1502 data[i++] = mgp->rx_done.lro_mgr.stats.flushed;
1503 if (mgp->rx_done.lro_mgr.stats.flushed)
1504 data[i++] = mgp->rx_done.lro_mgr.stats.aggregated /
1505 mgp->rx_done.lro_mgr.stats.flushed;
1506 else
1507 data[i++] = 0;
1508 data[i++] = mgp->rx_done.lro_mgr.stats.no_desc;
1509 }
1510
1511 static void myri10ge_set_msglevel(struct net_device *netdev, u32 value)
1512 {
1513 struct myri10ge_priv *mgp = netdev_priv(netdev);
1514 mgp->msg_enable = value;
1515 }
1516
1517 static u32 myri10ge_get_msglevel(struct net_device *netdev)
1518 {
1519 struct myri10ge_priv *mgp = netdev_priv(netdev);
1520 return mgp->msg_enable;
1521 }
1522
1523 static const struct ethtool_ops myri10ge_ethtool_ops = {
1524 .get_settings = myri10ge_get_settings,
1525 .get_drvinfo = myri10ge_get_drvinfo,
1526 .get_coalesce = myri10ge_get_coalesce,
1527 .set_coalesce = myri10ge_set_coalesce,
1528 .get_pauseparam = myri10ge_get_pauseparam,
1529 .set_pauseparam = myri10ge_set_pauseparam,
1530 .get_ringparam = myri10ge_get_ringparam,
1531 .get_rx_csum = myri10ge_get_rx_csum,
1532 .set_rx_csum = myri10ge_set_rx_csum,
1533 .set_tx_csum = ethtool_op_set_tx_hw_csum,
1534 .set_sg = ethtool_op_set_sg,
1535 .set_tso = myri10ge_set_tso,
1536 .get_link = ethtool_op_get_link,
1537 .get_strings = myri10ge_get_strings,
1538 .get_sset_count = myri10ge_get_sset_count,
1539 .get_ethtool_stats = myri10ge_get_ethtool_stats,
1540 .set_msglevel = myri10ge_set_msglevel,
1541 .get_msglevel = myri10ge_get_msglevel
1542 };
1543
1544 static int myri10ge_allocate_rings(struct net_device *dev)
1545 {
1546 struct myri10ge_priv *mgp;
1547 struct myri10ge_cmd cmd;
1548 int tx_ring_size, rx_ring_size;
1549 int tx_ring_entries, rx_ring_entries;
1550 int i, status;
1551 size_t bytes;
1552
1553 mgp = netdev_priv(dev);
1554
1555 /* get ring sizes */
1556
1557 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0);
1558 tx_ring_size = cmd.data0;
1559 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
1560 if (status != 0)
1561 return status;
1562 rx_ring_size = cmd.data0;
1563
1564 tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send);
1565 rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr);
1566 mgp->tx.mask = tx_ring_entries - 1;
1567 mgp->rx_small.mask = mgp->rx_big.mask = rx_ring_entries - 1;
1568
1569 status = -ENOMEM;
1570
1571 /* allocate the host shadow rings */
1572
1573 bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4)
1574 * sizeof(*mgp->tx.req_list);
1575 mgp->tx.req_bytes = kzalloc(bytes, GFP_KERNEL);
1576 if (mgp->tx.req_bytes == NULL)
1577 goto abort_with_nothing;
1578
1579 /* ensure req_list entries are aligned to 8 bytes */
1580 mgp->tx.req_list = (struct mcp_kreq_ether_send *)
1581 ALIGN((unsigned long)mgp->tx.req_bytes, 8);
1582
1583 bytes = rx_ring_entries * sizeof(*mgp->rx_small.shadow);
1584 mgp->rx_small.shadow = kzalloc(bytes, GFP_KERNEL);
1585 if (mgp->rx_small.shadow == NULL)
1586 goto abort_with_tx_req_bytes;
1587
1588 bytes = rx_ring_entries * sizeof(*mgp->rx_big.shadow);
1589 mgp->rx_big.shadow = kzalloc(bytes, GFP_KERNEL);
1590 if (mgp->rx_big.shadow == NULL)
1591 goto abort_with_rx_small_shadow;
1592
1593 /* allocate the host info rings */
1594
1595 bytes = tx_ring_entries * sizeof(*mgp->tx.info);
1596 mgp->tx.info = kzalloc(bytes, GFP_KERNEL);
1597 if (mgp->tx.info == NULL)
1598 goto abort_with_rx_big_shadow;
1599
1600 bytes = rx_ring_entries * sizeof(*mgp->rx_small.info);
1601 mgp->rx_small.info = kzalloc(bytes, GFP_KERNEL);
1602 if (mgp->rx_small.info == NULL)
1603 goto abort_with_tx_info;
1604
1605 bytes = rx_ring_entries * sizeof(*mgp->rx_big.info);
1606 mgp->rx_big.info = kzalloc(bytes, GFP_KERNEL);
1607 if (mgp->rx_big.info == NULL)
1608 goto abort_with_rx_small_info;
1609
1610 /* Fill the receive rings */
1611 mgp->rx_big.cnt = 0;
1612 mgp->rx_small.cnt = 0;
1613 mgp->rx_big.fill_cnt = 0;
1614 mgp->rx_small.fill_cnt = 0;
1615 mgp->rx_small.page_offset = MYRI10GE_ALLOC_SIZE;
1616 mgp->rx_big.page_offset = MYRI10GE_ALLOC_SIZE;
1617 mgp->rx_small.watchdog_needed = 0;
1618 mgp->rx_big.watchdog_needed = 0;
1619 myri10ge_alloc_rx_pages(mgp, &mgp->rx_small,
1620 mgp->small_bytes + MXGEFW_PAD, 0);
1621
1622 if (mgp->rx_small.fill_cnt < mgp->rx_small.mask + 1) {
1623 printk(KERN_ERR "myri10ge: %s: alloced only %d small bufs\n",
1624 dev->name, mgp->rx_small.fill_cnt);
1625 goto abort_with_rx_small_ring;
1626 }
1627
1628 myri10ge_alloc_rx_pages(mgp, &mgp->rx_big, mgp->big_bytes, 0);
1629 if (mgp->rx_big.fill_cnt < mgp->rx_big.mask + 1) {
1630 printk(KERN_ERR "myri10ge: %s: alloced only %d big bufs\n",
1631 dev->name, mgp->rx_big.fill_cnt);
1632 goto abort_with_rx_big_ring;
1633 }
1634
1635 return 0;
1636
1637 abort_with_rx_big_ring:
1638 for (i = mgp->rx_big.cnt; i < mgp->rx_big.fill_cnt; i++) {
1639 int idx = i & mgp->rx_big.mask;
1640 myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_big.info[idx],
1641 mgp->big_bytes);
1642 put_page(mgp->rx_big.info[idx].page);
1643 }
1644
1645 abort_with_rx_small_ring:
1646 for (i = mgp->rx_small.cnt; i < mgp->rx_small.fill_cnt; i++) {
1647 int idx = i & mgp->rx_small.mask;
1648 myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_small.info[idx],
1649 mgp->small_bytes + MXGEFW_PAD);
1650 put_page(mgp->rx_small.info[idx].page);
1651 }
1652
1653 kfree(mgp->rx_big.info);
1654
1655 abort_with_rx_small_info:
1656 kfree(mgp->rx_small.info);
1657
1658 abort_with_tx_info:
1659 kfree(mgp->tx.info);
1660
1661 abort_with_rx_big_shadow:
1662 kfree(mgp->rx_big.shadow);
1663
1664 abort_with_rx_small_shadow:
1665 kfree(mgp->rx_small.shadow);
1666
1667 abort_with_tx_req_bytes:
1668 kfree(mgp->tx.req_bytes);
1669 mgp->tx.req_bytes = NULL;
1670 mgp->tx.req_list = NULL;
1671
1672 abort_with_nothing:
1673 return status;
1674 }
1675
1676 static void myri10ge_free_rings(struct net_device *dev)
1677 {
1678 struct myri10ge_priv *mgp;
1679 struct sk_buff *skb;
1680 struct myri10ge_tx_buf *tx;
1681 int i, len, idx;
1682
1683 mgp = netdev_priv(dev);
1684
1685 for (i = mgp->rx_big.cnt; i < mgp->rx_big.fill_cnt; i++) {
1686 idx = i & mgp->rx_big.mask;
1687 if (i == mgp->rx_big.fill_cnt - 1)
1688 mgp->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE;
1689 myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_big.info[idx],
1690 mgp->big_bytes);
1691 put_page(mgp->rx_big.info[idx].page);
1692 }
1693
1694 for (i = mgp->rx_small.cnt; i < mgp->rx_small.fill_cnt; i++) {
1695 idx = i & mgp->rx_small.mask;
1696 if (i == mgp->rx_small.fill_cnt - 1)
1697 mgp->rx_small.info[idx].page_offset =
1698 MYRI10GE_ALLOC_SIZE;
1699 myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_small.info[idx],
1700 mgp->small_bytes + MXGEFW_PAD);
1701 put_page(mgp->rx_small.info[idx].page);
1702 }
1703 tx = &mgp->tx;
1704 while (tx->done != tx->req) {
1705 idx = tx->done & tx->mask;
1706 skb = tx->info[idx].skb;
1707
1708 /* Mark as free */
1709 tx->info[idx].skb = NULL;
1710 tx->done++;
1711 len = pci_unmap_len(&tx->info[idx], len);
1712 pci_unmap_len_set(&tx->info[idx], len, 0);
1713 if (skb) {
1714 mgp->stats.tx_dropped++;
1715 dev_kfree_skb_any(skb);
1716 if (len)
1717 pci_unmap_single(mgp->pdev,
1718 pci_unmap_addr(&tx->info[idx],
1719 bus), len,
1720 PCI_DMA_TODEVICE);
1721 } else {
1722 if (len)
1723 pci_unmap_page(mgp->pdev,
1724 pci_unmap_addr(&tx->info[idx],
1725 bus), len,
1726 PCI_DMA_TODEVICE);
1727 }
1728 }
1729 kfree(mgp->rx_big.info);
1730
1731 kfree(mgp->rx_small.info);
1732
1733 kfree(mgp->tx.info);
1734
1735 kfree(mgp->rx_big.shadow);
1736
1737 kfree(mgp->rx_small.shadow);
1738
1739 kfree(mgp->tx.req_bytes);
1740 mgp->tx.req_bytes = NULL;
1741 mgp->tx.req_list = NULL;
1742 }
1743
1744 static int myri10ge_request_irq(struct myri10ge_priv *mgp)
1745 {
1746 struct pci_dev *pdev = mgp->pdev;
1747 int status;
1748
1749 if (myri10ge_msi) {
1750 status = pci_enable_msi(pdev);
1751 if (status != 0)
1752 dev_err(&pdev->dev,
1753 "Error %d setting up MSI; falling back to xPIC\n",
1754 status);
1755 else
1756 mgp->msi_enabled = 1;
1757 } else {
1758 mgp->msi_enabled = 0;
1759 }
1760 status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED,
1761 mgp->dev->name, mgp);
1762 if (status != 0) {
1763 dev_err(&pdev->dev, "failed to allocate IRQ\n");
1764 if (mgp->msi_enabled)
1765 pci_disable_msi(pdev);
1766 }
1767 return status;
1768 }
1769
1770 static void myri10ge_free_irq(struct myri10ge_priv *mgp)
1771 {
1772 struct pci_dev *pdev = mgp->pdev;
1773
1774 free_irq(pdev->irq, mgp);
1775 if (mgp->msi_enabled)
1776 pci_disable_msi(pdev);
1777 }
1778
1779 static int
1780 myri10ge_get_frag_header(struct skb_frag_struct *frag, void **mac_hdr,
1781 void **ip_hdr, void **tcpudp_hdr,
1782 u64 * hdr_flags, void *priv)
1783 {
1784 struct ethhdr *eh;
1785 struct vlan_ethhdr *veh;
1786 struct iphdr *iph;
1787 u8 *va = page_address(frag->page) + frag->page_offset;
1788 unsigned long ll_hlen;
1789 __wsum csum = (__wsum) (unsigned long)priv;
1790
1791 /* find the mac header, aborting if not IPv4 */
1792
1793 eh = (struct ethhdr *)va;
1794 *mac_hdr = eh;
1795 ll_hlen = ETH_HLEN;
1796 if (eh->h_proto != htons(ETH_P_IP)) {
1797 if (eh->h_proto == htons(ETH_P_8021Q)) {
1798 veh = (struct vlan_ethhdr *)va;
1799 if (veh->h_vlan_encapsulated_proto != htons(ETH_P_IP))
1800 return -1;
1801
1802 ll_hlen += VLAN_HLEN;
1803
1804 /*
1805 * HW checksum starts ETH_HLEN bytes into
1806 * frame, so we must subtract off the VLAN
1807 * header's checksum before csum can be used
1808 */
1809 csum = csum_sub(csum, csum_partial(va + ETH_HLEN,
1810 VLAN_HLEN, 0));
1811 } else {
1812 return -1;
1813 }
1814 }
1815 *hdr_flags = LRO_IPV4;
1816
1817 iph = (struct iphdr *)(va + ll_hlen);
1818 *ip_hdr = iph;
1819 if (iph->protocol != IPPROTO_TCP)
1820 return -1;
1821 *hdr_flags |= LRO_TCP;
1822 *tcpudp_hdr = (u8 *) (*ip_hdr) + (iph->ihl << 2);
1823
1824 /* verify the IP checksum */
1825 if (unlikely(ip_fast_csum((u8 *) iph, iph->ihl)))
1826 return -1;
1827
1828 /* verify the checksum */
1829 if (unlikely(csum_tcpudp_magic(iph->saddr, iph->daddr,
1830 ntohs(iph->tot_len) - (iph->ihl << 2),
1831 IPPROTO_TCP, csum)))
1832 return -1;
1833
1834 return 0;
1835 }
1836
1837 static int myri10ge_open(struct net_device *dev)
1838 {
1839 struct myri10ge_priv *mgp;
1840 struct myri10ge_cmd cmd;
1841 struct net_lro_mgr *lro_mgr;
1842 int status, big_pow2;
1843
1844 mgp = netdev_priv(dev);
1845
1846 if (mgp->running != MYRI10GE_ETH_STOPPED)
1847 return -EBUSY;
1848
1849 mgp->running = MYRI10GE_ETH_STARTING;
1850 status = myri10ge_reset(mgp);
1851 if (status != 0) {
1852 printk(KERN_ERR "myri10ge: %s: failed reset\n", dev->name);
1853 goto abort_with_nothing;
1854 }
1855
1856 status = myri10ge_request_irq(mgp);
1857 if (status != 0)
1858 goto abort_with_nothing;
1859
1860 /* decide what small buffer size to use. For good TCP rx
1861 * performance, it is important to not receive 1514 byte
1862 * frames into jumbo buffers, as it confuses the socket buffer
1863 * accounting code, leading to drops and erratic performance.
1864 */
1865
1866 if (dev->mtu <= ETH_DATA_LEN)
1867 /* enough for a TCP header */
1868 mgp->small_bytes = (128 > SMP_CACHE_BYTES)
1869 ? (128 - MXGEFW_PAD)
1870 : (SMP_CACHE_BYTES - MXGEFW_PAD);
1871 else
1872 /* enough for a vlan encapsulated ETH_DATA_LEN frame */
1873 mgp->small_bytes = VLAN_ETH_FRAME_LEN;
1874
1875 /* Override the small buffer size? */
1876 if (myri10ge_small_bytes > 0)
1877 mgp->small_bytes = myri10ge_small_bytes;
1878
1879 /* get the lanai pointers to the send and receive rings */
1880
1881 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET, &cmd, 0);
1882 mgp->tx.lanai =
1883 (struct mcp_kreq_ether_send __iomem *)(mgp->sram + cmd.data0);
1884
1885 status |=
1886 myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET, &cmd, 0);
1887 mgp->rx_small.lanai =
1888 (struct mcp_kreq_ether_recv __iomem *)(mgp->sram + cmd.data0);
1889
1890 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0);
1891 mgp->rx_big.lanai =
1892 (struct mcp_kreq_ether_recv __iomem *)(mgp->sram + cmd.data0);
1893
1894 if (status != 0) {
1895 printk(KERN_ERR
1896 "myri10ge: %s: failed to get ring sizes or locations\n",
1897 dev->name);
1898 mgp->running = MYRI10GE_ETH_STOPPED;
1899 goto abort_with_irq;
1900 }
1901
1902 if (myri10ge_wcfifo && mgp->wc_enabled) {
1903 mgp->tx.wc_fifo = (u8 __iomem *) mgp->sram + MXGEFW_ETH_SEND_4;
1904 mgp->rx_small.wc_fifo =
1905 (u8 __iomem *) mgp->sram + MXGEFW_ETH_RECV_SMALL;
1906 mgp->rx_big.wc_fifo =
1907 (u8 __iomem *) mgp->sram + MXGEFW_ETH_RECV_BIG;
1908 } else {
1909 mgp->tx.wc_fifo = NULL;
1910 mgp->rx_small.wc_fifo = NULL;
1911 mgp->rx_big.wc_fifo = NULL;
1912 }
1913
1914 /* Firmware needs the big buff size as a power of 2. Lie and
1915 * tell him the buffer is larger, because we only use 1
1916 * buffer/pkt, and the mtu will prevent overruns.
1917 */
1918 big_pow2 = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
1919 if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) {
1920 while (!is_power_of_2(big_pow2))
1921 big_pow2++;
1922 mgp->big_bytes = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
1923 } else {
1924 big_pow2 = MYRI10GE_ALLOC_SIZE;
1925 mgp->big_bytes = big_pow2;
1926 }
1927
1928 status = myri10ge_allocate_rings(dev);
1929 if (status != 0)
1930 goto abort_with_irq;
1931
1932 /* now give firmware buffers sizes, and MTU */
1933 cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
1934 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0);
1935 cmd.data0 = mgp->small_bytes;
1936 status |=
1937 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0);
1938 cmd.data0 = big_pow2;
1939 status |=
1940 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0);
1941 if (status) {
1942 printk(KERN_ERR "myri10ge: %s: Couldn't set buffer sizes\n",
1943 dev->name);
1944 goto abort_with_rings;
1945 }
1946
1947 cmd.data0 = MYRI10GE_LOWPART_TO_U32(mgp->fw_stats_bus);
1948 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(mgp->fw_stats_bus);
1949 cmd.data2 = sizeof(struct mcp_irq_data);
1950 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0);
1951 if (status == -ENOSYS) {
1952 dma_addr_t bus = mgp->fw_stats_bus;
1953 bus += offsetof(struct mcp_irq_data, send_done_count);
1954 cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus);
1955 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus);
1956 status = myri10ge_send_cmd(mgp,
1957 MXGEFW_CMD_SET_STATS_DMA_OBSOLETE,
1958 &cmd, 0);
1959 /* Firmware cannot support multicast without STATS_DMA_V2 */
1960 mgp->fw_multicast_support = 0;
1961 } else {
1962 mgp->fw_multicast_support = 1;
1963 }
1964 if (status) {
1965 printk(KERN_ERR "myri10ge: %s: Couldn't set stats DMA\n",
1966 dev->name);
1967 goto abort_with_rings;
1968 }
1969
1970 mgp->link_state = htonl(~0U);
1971 mgp->rdma_tags_available = 15;
1972
1973 lro_mgr = &mgp->rx_done.lro_mgr;
1974 lro_mgr->dev = dev;
1975 lro_mgr->features = LRO_F_NAPI;
1976 lro_mgr->ip_summed = CHECKSUM_COMPLETE;
1977 lro_mgr->ip_summed_aggr = CHECKSUM_UNNECESSARY;
1978 lro_mgr->max_desc = MYRI10GE_MAX_LRO_DESCRIPTORS;
1979 lro_mgr->lro_arr = mgp->rx_done.lro_desc;
1980 lro_mgr->get_frag_header = myri10ge_get_frag_header;
1981 lro_mgr->max_aggr = myri10ge_lro_max_pkts;
1982 if (lro_mgr->max_aggr > MAX_SKB_FRAGS)
1983 lro_mgr->max_aggr = MAX_SKB_FRAGS;
1984
1985 napi_enable(&mgp->napi); /* must happen prior to any irq */
1986
1987 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0);
1988 if (status) {
1989 printk(KERN_ERR "myri10ge: %s: Couldn't bring up link\n",
1990 dev->name);
1991 goto abort_with_rings;
1992 }
1993
1994 mgp->wake_queue = 0;
1995 mgp->stop_queue = 0;
1996 mgp->running = MYRI10GE_ETH_RUNNING;
1997 mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ;
1998 add_timer(&mgp->watchdog_timer);
1999 netif_wake_queue(dev);
2000 return 0;
2001
2002 abort_with_rings:
2003 myri10ge_free_rings(dev);
2004
2005 abort_with_irq:
2006 myri10ge_free_irq(mgp);
2007
2008 abort_with_nothing:
2009 mgp->running = MYRI10GE_ETH_STOPPED;
2010 return -ENOMEM;
2011 }
2012
2013 static int myri10ge_close(struct net_device *dev)
2014 {
2015 struct myri10ge_priv *mgp;
2016 struct myri10ge_cmd cmd;
2017 int status, old_down_cnt;
2018
2019 mgp = netdev_priv(dev);
2020
2021 if (mgp->running != MYRI10GE_ETH_RUNNING)
2022 return 0;
2023
2024 if (mgp->tx.req_bytes == NULL)
2025 return 0;
2026
2027 del_timer_sync(&mgp->watchdog_timer);
2028 mgp->running = MYRI10GE_ETH_STOPPING;
2029 napi_disable(&mgp->napi);
2030 netif_carrier_off(dev);
2031 netif_stop_queue(dev);
2032 old_down_cnt = mgp->down_cnt;
2033 mb();
2034 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0);
2035 if (status)
2036 printk(KERN_ERR "myri10ge: %s: Couldn't bring down link\n",
2037 dev->name);
2038
2039 wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt, HZ);
2040 if (old_down_cnt == mgp->down_cnt)
2041 printk(KERN_ERR "myri10ge: %s never got down irq\n", dev->name);
2042
2043 netif_tx_disable(dev);
2044 myri10ge_free_irq(mgp);
2045 myri10ge_free_rings(dev);
2046
2047 mgp->running = MYRI10GE_ETH_STOPPED;
2048 return 0;
2049 }
2050
2051 /* copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
2052 * backwards one at a time and handle ring wraps */
2053
2054 static inline void
2055 myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx,
2056 struct mcp_kreq_ether_send *src, int cnt)
2057 {
2058 int idx, starting_slot;
2059 starting_slot = tx->req;
2060 while (cnt > 1) {
2061 cnt--;
2062 idx = (starting_slot + cnt) & tx->mask;
2063 myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src));
2064 mb();
2065 }
2066 }
2067
2068 /*
2069 * copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
2070 * at most 32 bytes at a time, so as to avoid involving the software
2071 * pio handler in the nic. We re-write the first segment's flags
2072 * to mark them valid only after writing the entire chain.
2073 */
2074
2075 static inline void
2076 myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src,
2077 int cnt)
2078 {
2079 int idx, i;
2080 struct mcp_kreq_ether_send __iomem *dstp, *dst;
2081 struct mcp_kreq_ether_send *srcp;
2082 u8 last_flags;
2083
2084 idx = tx->req & tx->mask;
2085
2086 last_flags = src->flags;
2087 src->flags = 0;
2088 mb();
2089 dst = dstp = &tx->lanai[idx];
2090 srcp = src;
2091
2092 if ((idx + cnt) < tx->mask) {
2093 for (i = 0; i < (cnt - 1); i += 2) {
2094 myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src));
2095 mb(); /* force write every 32 bytes */
2096 srcp += 2;
2097 dstp += 2;
2098 }
2099 } else {
2100 /* submit all but the first request, and ensure
2101 * that it is submitted below */
2102 myri10ge_submit_req_backwards(tx, src, cnt);
2103 i = 0;
2104 }
2105 if (i < cnt) {
2106 /* submit the first request */
2107 myri10ge_pio_copy(dstp, srcp, sizeof(*src));
2108 mb(); /* barrier before setting valid flag */
2109 }
2110
2111 /* re-write the last 32-bits with the valid flags */
2112 src->flags = last_flags;
2113 put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3);
2114 tx->req += cnt;
2115 mb();
2116 }
2117
2118 static inline void
2119 myri10ge_submit_req_wc(struct myri10ge_tx_buf *tx,
2120 struct mcp_kreq_ether_send *src, int cnt)
2121 {
2122 tx->req += cnt;
2123 mb();
2124 while (cnt >= 4) {
2125 myri10ge_pio_copy(tx->wc_fifo, src, 64);
2126 mb();
2127 src += 4;
2128 cnt -= 4;
2129 }
2130 if (cnt > 0) {
2131 /* pad it to 64 bytes. The src is 64 bytes bigger than it
2132 * needs to be so that we don't overrun it */
2133 myri10ge_pio_copy(tx->wc_fifo + MXGEFW_ETH_SEND_OFFSET(cnt),
2134 src, 64);
2135 mb();
2136 }
2137 }
2138
2139 /*
2140 * Transmit a packet. We need to split the packet so that a single
2141 * segment does not cross myri10ge->tx.boundary, so this makes segment
2142 * counting tricky. So rather than try to count segments up front, we
2143 * just give up if there are too few segments to hold a reasonably
2144 * fragmented packet currently available. If we run
2145 * out of segments while preparing a packet for DMA, we just linearize
2146 * it and try again.
2147 */
2148
2149 static int myri10ge_xmit(struct sk_buff *skb, struct net_device *dev)
2150 {
2151 struct myri10ge_priv *mgp = netdev_priv(dev);
2152 struct mcp_kreq_ether_send *req;
2153 struct myri10ge_tx_buf *tx = &mgp->tx;
2154 struct skb_frag_struct *frag;
2155 dma_addr_t bus;
2156 u32 low;
2157 __be32 high_swapped;
2158 unsigned int len;
2159 int idx, last_idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
2160 u16 pseudo_hdr_offset, cksum_offset;
2161 int cum_len, seglen, boundary, rdma_count;
2162 u8 flags, odd_flag;
2163
2164 again:
2165 req = tx->req_list;
2166 avail = tx->mask - 1 - (tx->req - tx->done);
2167
2168 mss = 0;
2169 max_segments = MXGEFW_MAX_SEND_DESC;
2170
2171 if (skb_is_gso(skb)) {
2172 mss = skb_shinfo(skb)->gso_size;
2173 max_segments = MYRI10GE_MAX_SEND_DESC_TSO;
2174 }
2175
2176 if ((unlikely(avail < max_segments))) {
2177 /* we are out of transmit resources */
2178 mgp->stop_queue++;
2179 netif_stop_queue(dev);
2180 return 1;
2181 }
2182
2183 /* Setup checksum offloading, if needed */
2184 cksum_offset = 0;
2185 pseudo_hdr_offset = 0;
2186 odd_flag = 0;
2187 flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
2188 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2189 cksum_offset = skb_transport_offset(skb);
2190 pseudo_hdr_offset = cksum_offset + skb->csum_offset;
2191 /* If the headers are excessively large, then we must
2192 * fall back to a software checksum */
2193 if (unlikely(!mss && (cksum_offset > 255 ||
2194 pseudo_hdr_offset > 127))) {
2195 if (skb_checksum_help(skb))
2196 goto drop;
2197 cksum_offset = 0;
2198 pseudo_hdr_offset = 0;
2199 } else {
2200 odd_flag = MXGEFW_FLAGS_ALIGN_ODD;
2201 flags |= MXGEFW_FLAGS_CKSUM;
2202 }
2203 }
2204
2205 cum_len = 0;
2206
2207 if (mss) { /* TSO */
2208 /* this removes any CKSUM flag from before */
2209 flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST);
2210
2211 /* negative cum_len signifies to the
2212 * send loop that we are still in the
2213 * header portion of the TSO packet.
2214 * TSO header can be at most 1KB long */
2215 cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb));
2216
2217 /* for IPv6 TSO, the checksum offset stores the
2218 * TCP header length, to save the firmware from
2219 * the need to parse the headers */
2220 if (skb_is_gso_v6(skb)) {
2221 cksum_offset = tcp_hdrlen(skb);
2222 /* Can only handle headers <= max_tso6 long */
2223 if (unlikely(-cum_len > mgp->max_tso6))
2224 return myri10ge_sw_tso(skb, dev);
2225 }
2226 /* for TSO, pseudo_hdr_offset holds mss.
2227 * The firmware figures out where to put
2228 * the checksum by parsing the header. */
2229 pseudo_hdr_offset = mss;
2230 } else
2231 /* Mark small packets, and pad out tiny packets */
2232 if (skb->len <= MXGEFW_SEND_SMALL_SIZE) {
2233 flags |= MXGEFW_FLAGS_SMALL;
2234
2235 /* pad frames to at least ETH_ZLEN bytes */
2236 if (unlikely(skb->len < ETH_ZLEN)) {
2237 if (skb_padto(skb, ETH_ZLEN)) {
2238 /* The packet is gone, so we must
2239 * return 0 */
2240 mgp->stats.tx_dropped += 1;
2241 return 0;
2242 }
2243 /* adjust the len to account for the zero pad
2244 * so that the nic can know how long it is */
2245 skb->len = ETH_ZLEN;
2246 }
2247 }
2248
2249 /* map the skb for DMA */
2250 len = skb->len - skb->data_len;
2251 idx = tx->req & tx->mask;
2252 tx->info[idx].skb = skb;
2253 bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE);
2254 pci_unmap_addr_set(&tx->info[idx], bus, bus);
2255 pci_unmap_len_set(&tx->info[idx], len, len);
2256
2257 frag_cnt = skb_shinfo(skb)->nr_frags;
2258 frag_idx = 0;
2259 count = 0;
2260 rdma_count = 0;
2261
2262 /* "rdma_count" is the number of RDMAs belonging to the
2263 * current packet BEFORE the current send request. For
2264 * non-TSO packets, this is equal to "count".
2265 * For TSO packets, rdma_count needs to be reset
2266 * to 0 after a segment cut.
2267 *
2268 * The rdma_count field of the send request is
2269 * the number of RDMAs of the packet starting at
2270 * that request. For TSO send requests with one ore more cuts
2271 * in the middle, this is the number of RDMAs starting
2272 * after the last cut in the request. All previous
2273 * segments before the last cut implicitly have 1 RDMA.
2274 *
2275 * Since the number of RDMAs is not known beforehand,
2276 * it must be filled-in retroactively - after each
2277 * segmentation cut or at the end of the entire packet.
2278 */
2279
2280 while (1) {
2281 /* Break the SKB or Fragment up into pieces which
2282 * do not cross mgp->tx.boundary */
2283 low = MYRI10GE_LOWPART_TO_U32(bus);
2284 high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
2285 while (len) {
2286 u8 flags_next;
2287 int cum_len_next;
2288
2289 if (unlikely(count == max_segments))
2290 goto abort_linearize;
2291
2292 boundary = (low + tx->boundary) & ~(tx->boundary - 1);
2293 seglen = boundary - low;
2294 if (seglen > len)
2295 seglen = len;
2296 flags_next = flags & ~MXGEFW_FLAGS_FIRST;
2297 cum_len_next = cum_len + seglen;
2298 if (mss) { /* TSO */
2299 (req - rdma_count)->rdma_count = rdma_count + 1;
2300
2301 if (likely(cum_len >= 0)) { /* payload */
2302 int next_is_first, chop;
2303
2304 chop = (cum_len_next > mss);
2305 cum_len_next = cum_len_next % mss;
2306 next_is_first = (cum_len_next == 0);
2307 flags |= chop * MXGEFW_FLAGS_TSO_CHOP;
2308 flags_next |= next_is_first *
2309 MXGEFW_FLAGS_FIRST;
2310 rdma_count |= -(chop | next_is_first);
2311 rdma_count += chop & !next_is_first;
2312 } else if (likely(cum_len_next >= 0)) { /* header ends */
2313 int small;
2314
2315 rdma_count = -1;
2316 cum_len_next = 0;
2317 seglen = -cum_len;
2318 small = (mss <= MXGEFW_SEND_SMALL_SIZE);
2319 flags_next = MXGEFW_FLAGS_TSO_PLD |
2320 MXGEFW_FLAGS_FIRST |
2321 (small * MXGEFW_FLAGS_SMALL);
2322 }
2323 }
2324 req->addr_high = high_swapped;
2325 req->addr_low = htonl(low);
2326 req->pseudo_hdr_offset = htons(pseudo_hdr_offset);
2327 req->pad = 0; /* complete solid 16-byte block; does this matter? */
2328 req->rdma_count = 1;
2329 req->length = htons(seglen);
2330 req->cksum_offset = cksum_offset;
2331 req->flags = flags | ((cum_len & 1) * odd_flag);
2332
2333 low += seglen;
2334 len -= seglen;
2335 cum_len = cum_len_next;
2336 flags = flags_next;
2337 req++;
2338 count++;
2339 rdma_count++;
2340 if (cksum_offset != 0 && !(mss && skb_is_gso_v6(skb))) {
2341 if (unlikely(cksum_offset > seglen))
2342 cksum_offset -= seglen;
2343 else
2344 cksum_offset = 0;
2345 }
2346 }
2347 if (frag_idx == frag_cnt)
2348 break;
2349
2350 /* map next fragment for DMA */
2351 idx = (count + tx->req) & tx->mask;
2352 frag = &skb_shinfo(skb)->frags[frag_idx];
2353 frag_idx++;
2354 len = frag->size;
2355 bus = pci_map_page(mgp->pdev, frag->page, frag->page_offset,
2356 len, PCI_DMA_TODEVICE);
2357 pci_unmap_addr_set(&tx->info[idx], bus, bus);
2358 pci_unmap_len_set(&tx->info[idx], len, len);
2359 }
2360
2361 (req - rdma_count)->rdma_count = rdma_count;
2362 if (mss)
2363 do {
2364 req--;
2365 req->flags |= MXGEFW_FLAGS_TSO_LAST;
2366 } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP |
2367 MXGEFW_FLAGS_FIRST)));
2368 idx = ((count - 1) + tx->req) & tx->mask;
2369 tx->info[idx].last = 1;
2370 if (tx->wc_fifo == NULL)
2371 myri10ge_submit_req(tx, tx->req_list, count);
2372 else
2373 myri10ge_submit_req_wc(tx, tx->req_list, count);
2374 tx->pkt_start++;
2375 if ((avail - count) < MXGEFW_MAX_SEND_DESC) {
2376 mgp->stop_queue++;
2377 netif_stop_queue(dev);
2378 }
2379 dev->trans_start = jiffies;
2380 return 0;
2381
2382 abort_linearize:
2383 /* Free any DMA resources we've alloced and clear out the skb
2384 * slot so as to not trip up assertions, and to avoid a
2385 * double-free if linearizing fails */
2386
2387 last_idx = (idx + 1) & tx->mask;
2388 idx = tx->req & tx->mask;
2389 tx->info[idx].skb = NULL;
2390 do {
2391 len = pci_unmap_len(&tx->info[idx], len);
2392 if (len) {
2393 if (tx->info[idx].skb != NULL)
2394 pci_unmap_single(mgp->pdev,
2395 pci_unmap_addr(&tx->info[idx],
2396 bus), len,
2397 PCI_DMA_TODEVICE);
2398 else
2399 pci_unmap_page(mgp->pdev,
2400 pci_unmap_addr(&tx->info[idx],
2401 bus), len,
2402 PCI_DMA_TODEVICE);
2403 pci_unmap_len_set(&tx->info[idx], len, 0);
2404 tx->info[idx].skb = NULL;
2405 }
2406 idx = (idx + 1) & tx->mask;
2407 } while (idx != last_idx);
2408 if (skb_is_gso(skb)) {
2409 printk(KERN_ERR
2410 "myri10ge: %s: TSO but wanted to linearize?!?!?\n",
2411 mgp->dev->name);
2412 goto drop;
2413 }
2414
2415 if (skb_linearize(skb))
2416 goto drop;
2417
2418 mgp->tx_linearized++;
2419 goto again;
2420
2421 drop:
2422 dev_kfree_skb_any(skb);
2423 mgp->stats.tx_dropped += 1;
2424 return 0;
2425
2426 }
2427
2428 static int myri10ge_sw_tso(struct sk_buff *skb, struct net_device *dev)
2429 {
2430 struct sk_buff *segs, *curr;
2431 struct myri10ge_priv *mgp = dev->priv;
2432 int status;
2433
2434 segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO6);
2435 if (unlikely(IS_ERR(segs)))
2436 goto drop;
2437
2438 while (segs) {
2439 curr = segs;
2440 segs = segs->next;
2441 curr->next = NULL;
2442 status = myri10ge_xmit(curr, dev);
2443 if (status != 0) {
2444 dev_kfree_skb_any(curr);
2445 if (segs != NULL) {
2446 curr = segs;
2447 segs = segs->next;
2448 curr->next = NULL;
2449 dev_kfree_skb_any(segs);
2450 }
2451 goto drop;
2452 }
2453 }
2454 dev_kfree_skb_any(skb);
2455 return 0;
2456
2457 drop:
2458 dev_kfree_skb_any(skb);
2459 mgp->stats.tx_dropped += 1;
2460 return 0;
2461 }
2462
2463 static struct net_device_stats *myri10ge_get_stats(struct net_device *dev)
2464 {
2465 struct myri10ge_priv *mgp = netdev_priv(dev);
2466 return &mgp->stats;
2467 }
2468
2469 static void myri10ge_set_multicast_list(struct net_device *dev)
2470 {
2471 struct myri10ge_cmd cmd;
2472 struct myri10ge_priv *mgp;
2473 struct dev_mc_list *mc_list;
2474 __be32 data[2] = { 0, 0 };
2475 int err;
2476 DECLARE_MAC_BUF(mac);
2477
2478 mgp = netdev_priv(dev);
2479 /* can be called from atomic contexts,
2480 * pass 1 to force atomicity in myri10ge_send_cmd() */
2481 myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1);
2482
2483 /* This firmware is known to not support multicast */
2484 if (!mgp->fw_multicast_support)
2485 return;
2486
2487 /* Disable multicast filtering */
2488
2489 err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1);
2490 if (err != 0) {
2491 printk(KERN_ERR "myri10ge: %s: Failed MXGEFW_ENABLE_ALLMULTI,"
2492 " error status: %d\n", dev->name, err);
2493 goto abort;
2494 }
2495
2496 if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) {
2497 /* request to disable multicast filtering, so quit here */
2498 return;
2499 }
2500
2501 /* Flush the filters */
2502
2503 err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS,
2504 &cmd, 1);
2505 if (err != 0) {
2506 printk(KERN_ERR
2507 "myri10ge: %s: Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS"
2508 ", error status: %d\n", dev->name, err);
2509 goto abort;
2510 }
2511
2512 /* Walk the multicast list, and add each address */
2513 for (mc_list = dev->mc_list; mc_list != NULL; mc_list = mc_list->next) {
2514 memcpy(data, &mc_list->dmi_addr, 6);
2515 cmd.data0 = ntohl(data[0]);
2516 cmd.data1 = ntohl(data[1]);
2517 err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP,
2518 &cmd, 1);
2519
2520 if (err != 0) {
2521 printk(KERN_ERR "myri10ge: %s: Failed "
2522 "MXGEFW_JOIN_MULTICAST_GROUP, error status:"
2523 "%d\t", dev->name, err);
2524 printk(KERN_ERR "MAC %s\n",
2525 print_mac(mac, mc_list->dmi_addr));
2526 goto abort;
2527 }
2528 }
2529 /* Enable multicast filtering */
2530 err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1);
2531 if (err != 0) {
2532 printk(KERN_ERR "myri10ge: %s: Failed MXGEFW_DISABLE_ALLMULTI,"
2533 "error status: %d\n", dev->name, err);
2534 goto abort;
2535 }
2536
2537 return;
2538
2539 abort:
2540 return;
2541 }
2542
2543 static int myri10ge_set_mac_address(struct net_device *dev, void *addr)
2544 {
2545 struct sockaddr *sa = addr;
2546 struct myri10ge_priv *mgp = netdev_priv(dev);
2547 int status;
2548
2549 if (!is_valid_ether_addr(sa->sa_data))
2550 return -EADDRNOTAVAIL;
2551
2552 status = myri10ge_update_mac_address(mgp, sa->sa_data);
2553 if (status != 0) {
2554 printk(KERN_ERR
2555 "myri10ge: %s: changing mac address failed with %d\n",
2556 dev->name, status);
2557 return status;
2558 }
2559
2560 /* change the dev structure */
2561 memcpy(dev->dev_addr, sa->sa_data, 6);
2562 return 0;
2563 }
2564
2565 static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
2566 {
2567 struct myri10ge_priv *mgp = netdev_priv(dev);
2568 int error = 0;
2569
2570 if ((new_mtu < 68) || (ETH_HLEN + new_mtu > MYRI10GE_MAX_ETHER_MTU)) {
2571 printk(KERN_ERR "myri10ge: %s: new mtu (%d) is not valid\n",
2572 dev->name, new_mtu);
2573 return -EINVAL;
2574 }
2575 printk(KERN_INFO "%s: changing mtu from %d to %d\n",
2576 dev->name, dev->mtu, new_mtu);
2577 if (mgp->running) {
2578 /* if we change the mtu on an active device, we must
2579 * reset the device so the firmware sees the change */
2580 myri10ge_close(dev);
2581 dev->mtu = new_mtu;
2582 myri10ge_open(dev);
2583 } else
2584 dev->mtu = new_mtu;
2585
2586 return error;
2587 }
2588
2589 /*
2590 * Enable ECRC to align PCI-E Completion packets on an 8-byte boundary.
2591 * Only do it if the bridge is a root port since we don't want to disturb
2592 * any other device, except if forced with myri10ge_ecrc_enable > 1.
2593 */
2594
2595 static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
2596 {
2597 struct pci_dev *bridge = mgp->pdev->bus->self;
2598 struct device *dev = &mgp->pdev->dev;
2599 unsigned cap;
2600 unsigned err_cap;
2601 u16 val;
2602 u8 ext_type;
2603 int ret;
2604
2605 if (!myri10ge_ecrc_enable || !bridge)
2606 return;
2607
2608 /* check that the bridge is a root port */
2609 cap = pci_find_capability(bridge, PCI_CAP_ID_EXP);
2610 pci_read_config_word(bridge, cap + PCI_CAP_FLAGS, &val);
2611 ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
2612 if (ext_type != PCI_EXP_TYPE_ROOT_PORT) {
2613 if (myri10ge_ecrc_enable > 1) {
2614 struct pci_dev *old_bridge = bridge;
2615
2616 /* Walk the hierarchy up to the root port
2617 * where ECRC has to be enabled */
2618 do {
2619 bridge = bridge->bus->self;
2620 if (!bridge) {
2621 dev_err(dev,
2622 "Failed to find root port"
2623 " to force ECRC\n");
2624 return;
2625 }
2626 cap =
2627 pci_find_capability(bridge, PCI_CAP_ID_EXP);
2628 pci_read_config_word(bridge,
2629 cap + PCI_CAP_FLAGS, &val);
2630 ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
2631 } while (ext_type != PCI_EXP_TYPE_ROOT_PORT);
2632
2633 dev_info(dev,
2634 "Forcing ECRC on non-root port %s"
2635 " (enabling on root port %s)\n",
2636 pci_name(old_bridge), pci_name(bridge));
2637 } else {
2638 dev_err(dev,
2639 "Not enabling ECRC on non-root port %s\n",
2640 pci_name(bridge));
2641 return;
2642 }
2643 }
2644
2645 cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
2646 if (!cap)
2647 return;
2648
2649 ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap);
2650 if (ret) {
2651 dev_err(dev, "failed reading ext-conf-space of %s\n",
2652 pci_name(bridge));
2653 dev_err(dev, "\t pci=nommconf in use? "
2654 "or buggy/incomplete/absent ACPI MCFG attr?\n");
2655 return;
2656 }
2657 if (!(err_cap & PCI_ERR_CAP_ECRC_GENC))
2658 return;
2659
2660 err_cap |= PCI_ERR_CAP_ECRC_GENE;
2661 pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap);
2662 dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge));
2663 }
2664
2665 /*
2666 * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput
2667 * when the PCI-E Completion packets are aligned on an 8-byte
2668 * boundary. Some PCI-E chip sets always align Completion packets; on
2669 * the ones that do not, the alignment can be enforced by enabling
2670 * ECRC generation (if supported).
2671 *
2672 * When PCI-E Completion packets are not aligned, it is actually more
2673 * efficient to limit Read-DMA transactions to 2KB, rather than 4KB.
2674 *
2675 * If the driver can neither enable ECRC nor verify that it has
2676 * already been enabled, then it must use a firmware image which works
2677 * around unaligned completion packets (myri10ge_ethp_z8e.dat), and it
2678 * should also ensure that it never gives the device a Read-DMA which is
2679 * larger than 2KB by setting the tx.boundary to 2KB. If ECRC is
2680 * enabled, then the driver should use the aligned (myri10ge_eth_z8e.dat)
2681 * firmware image, and set tx.boundary to 4KB.
2682 */
2683
2684 static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
2685 {
2686 struct pci_dev *pdev = mgp->pdev;
2687 struct device *dev = &pdev->dev;
2688 int status;
2689
2690 mgp->tx.boundary = 4096;
2691 /*
2692 * Verify the max read request size was set to 4KB
2693 * before trying the test with 4KB.
2694 */
2695 status = pcie_get_readrq(pdev);
2696 if (status < 0) {
2697 dev_err(dev, "Couldn't read max read req size: %d\n", status);
2698 goto abort;
2699 }
2700 if (status != 4096) {
2701 dev_warn(dev, "Max Read Request size != 4096 (%d)\n", status);
2702 mgp->tx.boundary = 2048;
2703 }
2704 /*
2705 * load the optimized firmware (which assumes aligned PCIe
2706 * completions) in order to see if it works on this host.
2707 */
2708 mgp->fw_name = myri10ge_fw_aligned;
2709 status = myri10ge_load_firmware(mgp);
2710 if (status != 0) {
2711 goto abort;
2712 }
2713
2714 /*
2715 * Enable ECRC if possible
2716 */
2717 myri10ge_enable_ecrc(mgp);
2718
2719 /*
2720 * Run a DMA test which watches for unaligned completions and
2721 * aborts on the first one seen.
2722 */
2723
2724 status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST);
2725 if (status == 0)
2726 return; /* keep the aligned firmware */
2727
2728 if (status != -E2BIG)
2729 dev_warn(dev, "DMA test failed: %d\n", status);
2730 if (status == -ENOSYS)
2731 dev_warn(dev, "Falling back to ethp! "
2732 "Please install up to date fw\n");
2733 abort:
2734 /* fall back to using the unaligned firmware */
2735 mgp->tx.boundary = 2048;
2736 mgp->fw_name = myri10ge_fw_unaligned;
2737
2738 }
2739
2740 static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
2741 {
2742 if (myri10ge_force_firmware == 0) {
2743 int link_width, exp_cap;
2744 u16 lnk;
2745
2746 exp_cap = pci_find_capability(mgp->pdev, PCI_CAP_ID_EXP);
2747 pci_read_config_word(mgp->pdev, exp_cap + PCI_EXP_LNKSTA, &lnk);
2748 link_width = (lnk >> 4) & 0x3f;
2749
2750 /* Check to see if Link is less than 8 or if the
2751 * upstream bridge is known to provide aligned
2752 * completions */
2753 if (link_width < 8) {
2754 dev_info(&mgp->pdev->dev, "PCIE x%d Link\n",
2755 link_width);
2756 mgp->tx.boundary = 4096;
2757 mgp->fw_name = myri10ge_fw_aligned;
2758 } else {
2759 myri10ge_firmware_probe(mgp);
2760 }
2761 } else {
2762 if (myri10ge_force_firmware == 1) {
2763 dev_info(&mgp->pdev->dev,
2764 "Assuming aligned completions (forced)\n");
2765 mgp->tx.boundary = 4096;
2766 mgp->fw_name = myri10ge_fw_aligned;
2767 } else {
2768 dev_info(&mgp->pdev->dev,
2769 "Assuming unaligned completions (forced)\n");
2770 mgp->tx.boundary = 2048;
2771 mgp->fw_name = myri10ge_fw_unaligned;
2772 }
2773 }
2774 if (myri10ge_fw_name != NULL) {
2775 dev_info(&mgp->pdev->dev, "overriding firmware to %s\n",
2776 myri10ge_fw_name);
2777 mgp->fw_name = myri10ge_fw_name;
2778 }
2779 }
2780
2781 #ifdef CONFIG_PM
2782 static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state)
2783 {
2784 struct myri10ge_priv *mgp;
2785 struct net_device *netdev;
2786
2787 mgp = pci_get_drvdata(pdev);
2788 if (mgp == NULL)
2789 return -EINVAL;
2790 netdev = mgp->dev;
2791
2792 netif_device_detach(netdev);
2793 if (netif_running(netdev)) {
2794 printk(KERN_INFO "myri10ge: closing %s\n", netdev->name);
2795 rtnl_lock();
2796 myri10ge_close(netdev);
2797 rtnl_unlock();
2798 }
2799 myri10ge_dummy_rdma(mgp, 0);
2800 pci_save_state(pdev);
2801 pci_disable_device(pdev);
2802
2803 return pci_set_power_state(pdev, pci_choose_state(pdev, state));
2804 }
2805
2806 static int myri10ge_resume(struct pci_dev *pdev)
2807 {
2808 struct myri10ge_priv *mgp;
2809 struct net_device *netdev;
2810 int status;
2811 u16 vendor;
2812
2813 mgp = pci_get_drvdata(pdev);
2814 if (mgp == NULL)
2815 return -EINVAL;
2816 netdev = mgp->dev;
2817 pci_set_power_state(pdev, 0); /* zeros conf space as a side effect */
2818 msleep(5); /* give card time to respond */
2819 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
2820 if (vendor == 0xffff) {
2821 printk(KERN_ERR "myri10ge: %s: device disappeared!\n",
2822 mgp->dev->name);
2823 return -EIO;
2824 }
2825
2826 status = pci_restore_state(pdev);
2827 if (status)
2828 return status;
2829
2830 status = pci_enable_device(pdev);
2831 if (status) {
2832 dev_err(&pdev->dev, "failed to enable device\n");
2833 return status;
2834 }
2835
2836 pci_set_master(pdev);
2837
2838 myri10ge_reset(mgp);
2839 myri10ge_dummy_rdma(mgp, 1);
2840
2841 /* Save configuration space to be restored if the
2842 * nic resets due to a parity error */
2843 pci_save_state(pdev);
2844
2845 if (netif_running(netdev)) {
2846 rtnl_lock();
2847 status = myri10ge_open(netdev);
2848 rtnl_unlock();
2849 if (status != 0)
2850 goto abort_with_enabled;
2851
2852 }
2853 netif_device_attach(netdev);
2854
2855 return 0;
2856
2857 abort_with_enabled:
2858 pci_disable_device(pdev);
2859 return -EIO;
2860
2861 }
2862 #endif /* CONFIG_PM */
2863
2864 static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp)
2865 {
2866 struct pci_dev *pdev = mgp->pdev;
2867 int vs = mgp->vendor_specific_offset;
2868 u32 reboot;
2869
2870 /*enter read32 mode */
2871 pci_write_config_byte(pdev, vs + 0x10, 0x3);
2872
2873 /*read REBOOT_STATUS (0xfffffff0) */
2874 pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0);
2875 pci_read_config_dword(pdev, vs + 0x14, &reboot);
2876 return reboot;
2877 }
2878
2879 /*
2880 * This watchdog is used to check whether the board has suffered
2881 * from a parity error and needs to be recovered.
2882 */
2883 static void myri10ge_watchdog(struct work_struct *work)
2884 {
2885 struct myri10ge_priv *mgp =
2886 container_of(work, struct myri10ge_priv, watchdog_work);
2887 u32 reboot;
2888 int status;
2889 u16 cmd, vendor;
2890
2891 mgp->watchdog_resets++;
2892 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
2893 if ((cmd & PCI_COMMAND_MASTER) == 0) {
2894 /* Bus master DMA disabled? Check to see
2895 * if the card rebooted due to a parity error
2896 * For now, just report it */
2897 reboot = myri10ge_read_reboot(mgp);
2898 printk(KERN_ERR
2899 "myri10ge: %s: NIC rebooted (0x%x),%s resetting\n",
2900 mgp->dev->name, reboot,
2901 myri10ge_reset_recover ? " " : " not");
2902 if (myri10ge_reset_recover == 0)
2903 return;
2904
2905 myri10ge_reset_recover--;
2906
2907 /*
2908 * A rebooted nic will come back with config space as
2909 * it was after power was applied to PCIe bus.
2910 * Attempt to restore config space which was saved
2911 * when the driver was loaded, or the last time the
2912 * nic was resumed from power saving mode.
2913 */
2914 pci_restore_state(mgp->pdev);
2915
2916 /* save state again for accounting reasons */
2917 pci_save_state(mgp->pdev);
2918
2919 } else {
2920 /* if we get back -1's from our slot, perhaps somebody
2921 * powered off our card. Don't try to reset it in
2922 * this case */
2923 if (cmd == 0xffff) {
2924 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
2925 if (vendor == 0xffff) {
2926 printk(KERN_ERR
2927 "myri10ge: %s: device disappeared!\n",
2928 mgp->dev->name);
2929 return;
2930 }
2931 }
2932 /* Perhaps it is a software error. Try to reset */
2933
2934 printk(KERN_ERR "myri10ge: %s: device timeout, resetting\n",
2935 mgp->dev->name);
2936 printk(KERN_INFO "myri10ge: %s: %d %d %d %d %d\n",
2937 mgp->dev->name, mgp->tx.req, mgp->tx.done,
2938 mgp->tx.pkt_start, mgp->tx.pkt_done,
2939 (int)ntohl(mgp->fw_stats->send_done_count));
2940 msleep(2000);
2941 printk(KERN_INFO "myri10ge: %s: %d %d %d %d %d\n",
2942 mgp->dev->name, mgp->tx.req, mgp->tx.done,
2943 mgp->tx.pkt_start, mgp->tx.pkt_done,
2944 (int)ntohl(mgp->fw_stats->send_done_count));
2945 }
2946 rtnl_lock();
2947 myri10ge_close(mgp->dev);
2948 status = myri10ge_load_firmware(mgp);
2949 if (status != 0)
2950 printk(KERN_ERR "myri10ge: %s: failed to load firmware\n",
2951 mgp->dev->name);
2952 else
2953 myri10ge_open(mgp->dev);
2954 rtnl_unlock();
2955 }
2956
2957 /*
2958 * We use our own timer routine rather than relying upon
2959 * netdev->tx_timeout because we have a very large hardware transmit
2960 * queue. Due to the large queue, the netdev->tx_timeout function
2961 * cannot detect a NIC with a parity error in a timely fashion if the
2962 * NIC is lightly loaded.
2963 */
2964 static void myri10ge_watchdog_timer(unsigned long arg)
2965 {
2966 struct myri10ge_priv *mgp;
2967 u32 rx_pause_cnt;
2968
2969 mgp = (struct myri10ge_priv *)arg;
2970
2971 if (mgp->rx_small.watchdog_needed) {
2972 myri10ge_alloc_rx_pages(mgp, &mgp->rx_small,
2973 mgp->small_bytes + MXGEFW_PAD, 1);
2974 if (mgp->rx_small.fill_cnt - mgp->rx_small.cnt >=
2975 myri10ge_fill_thresh)
2976 mgp->rx_small.watchdog_needed = 0;
2977 }
2978 if (mgp->rx_big.watchdog_needed) {
2979 myri10ge_alloc_rx_pages(mgp, &mgp->rx_big, mgp->big_bytes, 1);
2980 if (mgp->rx_big.fill_cnt - mgp->rx_big.cnt >=
2981 myri10ge_fill_thresh)
2982 mgp->rx_big.watchdog_needed = 0;
2983 }
2984 rx_pause_cnt = ntohl(mgp->fw_stats->dropped_pause);
2985
2986 if (mgp->tx.req != mgp->tx.done &&
2987 mgp->tx.done == mgp->watchdog_tx_done &&
2988 mgp->watchdog_tx_req != mgp->watchdog_tx_done) {
2989 /* nic seems like it might be stuck.. */
2990 if (rx_pause_cnt != mgp->watchdog_pause) {
2991 if (net_ratelimit())
2992 printk(KERN_WARNING "myri10ge %s:"
2993 "TX paused, check link partner\n",
2994 mgp->dev->name);
2995 } else {
2996 schedule_work(&mgp->watchdog_work);
2997 return;
2998 }
2999 }
3000 /* rearm timer */
3001 mod_timer(&mgp->watchdog_timer,
3002 jiffies + myri10ge_watchdog_timeout * HZ);
3003 mgp->watchdog_tx_done = mgp->tx.done;
3004 mgp->watchdog_tx_req = mgp->tx.req;
3005 mgp->watchdog_pause = rx_pause_cnt;
3006 }
3007
3008 static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3009 {
3010 struct net_device *netdev;
3011 struct myri10ge_priv *mgp;
3012 struct device *dev = &pdev->dev;
3013 size_t bytes;
3014 int i;
3015 int status = -ENXIO;
3016 int dac_enabled;
3017
3018 netdev = alloc_etherdev(sizeof(*mgp));
3019 if (netdev == NULL) {
3020 dev_err(dev, "Could not allocate ethernet device\n");
3021 return -ENOMEM;
3022 }
3023
3024 SET_NETDEV_DEV(netdev, &pdev->dev);
3025
3026 mgp = netdev_priv(netdev);
3027 mgp->dev = netdev;
3028 netif_napi_add(netdev, &mgp->napi, myri10ge_poll, myri10ge_napi_weight);
3029 mgp->pdev = pdev;
3030 mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
3031 mgp->pause = myri10ge_flow_control;
3032 mgp->intr_coal_delay = myri10ge_intr_coal_delay;
3033 mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT);
3034 init_waitqueue_head(&mgp->down_wq);
3035
3036 if (pci_enable_device(pdev)) {
3037 dev_err(&pdev->dev, "pci_enable_device call failed\n");
3038 status = -ENODEV;
3039 goto abort_with_netdev;
3040 }
3041
3042 /* Find the vendor-specific cap so we can check
3043 * the reboot register later on */
3044 mgp->vendor_specific_offset
3045 = pci_find_capability(pdev, PCI_CAP_ID_VNDR);
3046
3047 /* Set our max read request to 4KB */
3048 status = pcie_set_readrq(pdev, 4096);
3049 if (status != 0) {
3050 dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n",
3051 status);
3052 goto abort_with_netdev;
3053 }
3054
3055 pci_set_master(pdev);
3056 dac_enabled = 1;
3057 status = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
3058 if (status != 0) {
3059 dac_enabled = 0;
3060 dev_err(&pdev->dev,
3061 "64-bit pci address mask was refused, trying 32-bit");
3062 status = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
3063 }
3064 if (status != 0) {
3065 dev_err(&pdev->dev, "Error %d setting DMA mask\n", status);
3066 goto abort_with_netdev;
3067 }
3068 mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd),
3069 &mgp->cmd_bus, GFP_KERNEL);
3070 if (mgp->cmd == NULL)
3071 goto abort_with_netdev;
3072
3073 mgp->fw_stats = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->fw_stats),
3074 &mgp->fw_stats_bus, GFP_KERNEL);
3075 if (mgp->fw_stats == NULL)
3076 goto abort_with_cmd;
3077
3078 mgp->board_span = pci_resource_len(pdev, 0);
3079 mgp->iomem_base = pci_resource_start(pdev, 0);
3080 mgp->mtrr = -1;
3081 mgp->wc_enabled = 0;
3082 #ifdef CONFIG_MTRR
3083 mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span,
3084 MTRR_TYPE_WRCOMB, 1);
3085 if (mgp->mtrr >= 0)
3086 mgp->wc_enabled = 1;
3087 #endif
3088 /* Hack. need to get rid of these magic numbers */
3089 mgp->sram_size =
3090 2 * 1024 * 1024 - (2 * (48 * 1024) + (32 * 1024)) - 0x100;
3091 if (mgp->sram_size > mgp->board_span) {
3092 dev_err(&pdev->dev, "board span %ld bytes too small\n",
3093 mgp->board_span);
3094 goto abort_with_wc;
3095 }
3096 mgp->sram = ioremap(mgp->iomem_base, mgp->board_span);
3097 if (mgp->sram == NULL) {
3098 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n",
3099 mgp->board_span, mgp->iomem_base);
3100 status = -ENXIO;
3101 goto abort_with_wc;
3102 }
3103 memcpy_fromio(mgp->eeprom_strings,
3104 mgp->sram + mgp->sram_size - MYRI10GE_EEPROM_STRINGS_SIZE,
3105 MYRI10GE_EEPROM_STRINGS_SIZE);
3106 memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2);
3107 status = myri10ge_read_mac_addr(mgp);
3108 if (status)
3109 goto abort_with_ioremap;
3110
3111 for (i = 0; i < ETH_ALEN; i++)
3112 netdev->dev_addr[i] = mgp->mac_addr[i];
3113
3114 /* allocate rx done ring */
3115 bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
3116 mgp->rx_done.entry = dma_alloc_coherent(&pdev->dev, bytes,
3117 &mgp->rx_done.bus, GFP_KERNEL);
3118 if (mgp->rx_done.entry == NULL)
3119 goto abort_with_ioremap;
3120 memset(mgp->rx_done.entry, 0, bytes);
3121
3122 myri10ge_select_firmware(mgp);
3123
3124 status = myri10ge_load_firmware(mgp);
3125 if (status != 0) {
3126 dev_err(&pdev->dev, "failed to load firmware\n");
3127 goto abort_with_rx_done;
3128 }
3129
3130 status = myri10ge_reset(mgp);
3131 if (status != 0) {
3132 dev_err(&pdev->dev, "failed reset\n");
3133 goto abort_with_firmware;
3134 }
3135
3136 pci_set_drvdata(pdev, mgp);
3137 if ((myri10ge_initial_mtu + ETH_HLEN) > MYRI10GE_MAX_ETHER_MTU)
3138 myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
3139 if ((myri10ge_initial_mtu + ETH_HLEN) < 68)
3140 myri10ge_initial_mtu = 68;
3141 netdev->mtu = myri10ge_initial_mtu;
3142 netdev->open = myri10ge_open;
3143 netdev->stop = myri10ge_close;
3144 netdev->hard_start_xmit = myri10ge_xmit;
3145 netdev->get_stats = myri10ge_get_stats;
3146 netdev->base_addr = mgp->iomem_base;
3147 netdev->change_mtu = myri10ge_change_mtu;
3148 netdev->set_multicast_list = myri10ge_set_multicast_list;
3149 netdev->set_mac_address = myri10ge_set_mac_address;
3150 netdev->features = mgp->features;
3151 if (dac_enabled)
3152 netdev->features |= NETIF_F_HIGHDMA;
3153
3154 /* make sure we can get an irq, and that MSI can be
3155 * setup (if available). Also ensure netdev->irq
3156 * is set to correct value if MSI is enabled */
3157 status = myri10ge_request_irq(mgp);
3158 if (status != 0)
3159 goto abort_with_firmware;
3160 netdev->irq = pdev->irq;
3161 myri10ge_free_irq(mgp);
3162
3163 /* Save configuration space to be restored if the
3164 * nic resets due to a parity error */
3165 pci_save_state(pdev);
3166
3167 /* Setup the watchdog timer */
3168 setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer,
3169 (unsigned long)mgp);
3170
3171 SET_ETHTOOL_OPS(netdev, &myri10ge_ethtool_ops);
3172 INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog);
3173 status = register_netdev(netdev);
3174 if (status != 0) {
3175 dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
3176 goto abort_with_state;
3177 }
3178 dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, WC %s\n",
3179 (mgp->msi_enabled ? "MSI" : "xPIC"),
3180 netdev->irq, mgp->tx.boundary, mgp->fw_name,
3181 (mgp->wc_enabled ? "Enabled" : "Disabled"));
3182
3183 return 0;
3184
3185 abort_with_state:
3186 pci_restore_state(pdev);
3187
3188 abort_with_firmware:
3189 myri10ge_dummy_rdma(mgp, 0);
3190
3191 abort_with_rx_done:
3192 bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
3193 dma_free_coherent(&pdev->dev, bytes,
3194 mgp->rx_done.entry, mgp->rx_done.bus);
3195
3196 abort_with_ioremap:
3197 iounmap(mgp->sram);
3198
3199 abort_with_wc:
3200 #ifdef CONFIG_MTRR
3201 if (mgp->mtrr >= 0)
3202 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
3203 #endif
3204 dma_free_coherent(&pdev->dev, sizeof(*mgp->fw_stats),
3205 mgp->fw_stats, mgp->fw_stats_bus);
3206
3207 abort_with_cmd:
3208 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
3209 mgp->cmd, mgp->cmd_bus);
3210
3211 abort_with_netdev:
3212
3213 free_netdev(netdev);
3214 return status;
3215 }
3216
3217 /*
3218 * myri10ge_remove
3219 *
3220 * Does what is necessary to shutdown one Myrinet device. Called
3221 * once for each Myrinet card by the kernel when a module is
3222 * unloaded.
3223 */
3224 static void myri10ge_remove(struct pci_dev *pdev)
3225 {
3226 struct myri10ge_priv *mgp;
3227 struct net_device *netdev;
3228 size_t bytes;
3229
3230 mgp = pci_get_drvdata(pdev);
3231 if (mgp == NULL)
3232 return;
3233
3234 flush_scheduled_work();
3235 netdev = mgp->dev;
3236 unregister_netdev(netdev);
3237
3238 myri10ge_dummy_rdma(mgp, 0);
3239
3240 /* avoid a memory leak */
3241 pci_restore_state(pdev);
3242
3243 bytes = myri10ge_max_intr_slots * sizeof(*mgp->rx_done.entry);
3244 dma_free_coherent(&pdev->dev, bytes,
3245 mgp->rx_done.entry, mgp->rx_done.bus);
3246
3247 iounmap(mgp->sram);
3248
3249 #ifdef CONFIG_MTRR
3250 if (mgp->mtrr >= 0)
3251 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
3252 #endif
3253 dma_free_coherent(&pdev->dev, sizeof(*mgp->fw_stats),
3254 mgp->fw_stats, mgp->fw_stats_bus);
3255
3256 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
3257 mgp->cmd, mgp->cmd_bus);
3258
3259 free_netdev(netdev);
3260 pci_set_drvdata(pdev, NULL);
3261 }
3262
3263 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E 0x0008
3264 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9 0x0009
3265
3266 static struct pci_device_id myri10ge_pci_tbl[] = {
3267 {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)},
3268 {PCI_DEVICE
3269 (PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9)},
3270 {0},
3271 };
3272
3273 static struct pci_driver myri10ge_driver = {
3274 .name = "myri10ge",
3275 .probe = myri10ge_probe,
3276 .remove = myri10ge_remove,
3277 .id_table = myri10ge_pci_tbl,
3278 #ifdef CONFIG_PM
3279 .suspend = myri10ge_suspend,
3280 .resume = myri10ge_resume,
3281 #endif
3282 };
3283
3284 static __init int myri10ge_init_module(void)
3285 {
3286 printk(KERN_INFO "%s: Version %s\n", myri10ge_driver.name,
3287 MYRI10GE_VERSION_STR);
3288 return pci_register_driver(&myri10ge_driver);
3289 }
3290
3291 module_init(myri10ge_init_module);
3292
3293 static __exit void myri10ge_cleanup_module(void)
3294 {
3295 pci_unregister_driver(&myri10ge_driver);
3296 }
3297
3298 module_exit(myri10ge_cleanup_module);
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