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