]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/net/myri10ge/myri10ge.c
projects / mirror_ubuntu-bionic-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[mirror_ubuntu-bionic-kernel.git] / drivers / net / myri10ge / myri10ge.c
1 /*************************************************************************
2 * myri10ge.c: Myricom Myri-10G Ethernet driver.
3 *
4 * Copyright (C) 2005 - 2009 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/inet_lro.h>
54 #include <linux/dca.h>
55 #include <linux/ip.h>
56 #include <linux/inet.h>
57 #include <linux/in.h>
58 #include <linux/ethtool.h>
59 #include <linux/firmware.h>
60 #include <linux/delay.h>
61 #include <linux/timer.h>
62 #include <linux/vmalloc.h>
63 #include <linux/crc32.h>
64 #include <linux/moduleparam.h>
65 #include <linux/io.h>
66 #include <linux/log2.h>
67 #include <linux/slab.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 "1.5.2-1.459"
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 #define MYRI10GE_MAX_LRO_DESCRIPTORS 8
99 #define MYRI10GE_LRO_MAX_PKTS 64
100
101 #define MYRI10GE_NO_CONFIRM_DATA htonl(0xffffffff)
102 #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff
103
104 #define MYRI10GE_ALLOC_ORDER 0
105 #define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE)
106 #define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1)
107
108 #define MYRI10GE_MAX_SLICES 32
109
110 struct myri10ge_rx_buffer_state {
111 struct page *page;
112 int page_offset;
113 DECLARE_PCI_UNMAP_ADDR(bus)
114 DECLARE_PCI_UNMAP_LEN(len)
115 };
116
117 struct myri10ge_tx_buffer_state {
118 struct sk_buff *skb;
119 int last;
120 DECLARE_PCI_UNMAP_ADDR(bus)
121 DECLARE_PCI_UNMAP_LEN(len)
122 };
123
124 struct myri10ge_cmd {
125 u32 data0;
126 u32 data1;
127 u32 data2;
128 };
129
130 struct myri10ge_rx_buf {
131 struct mcp_kreq_ether_recv __iomem *lanai; /* lanai ptr for recv ring */
132 struct mcp_kreq_ether_recv *shadow; /* host shadow of recv ring */
133 struct myri10ge_rx_buffer_state *info;
134 struct page *page;
135 dma_addr_t bus;
136 int page_offset;
137 int cnt;
138 int fill_cnt;
139 int alloc_fail;
140 int mask; /* number of rx slots -1 */
141 int watchdog_needed;
142 };
143
144 struct myri10ge_tx_buf {
145 struct mcp_kreq_ether_send __iomem *lanai; /* lanai ptr for sendq */
146 __be32 __iomem *send_go; /* "go" doorbell ptr */
147 __be32 __iomem *send_stop; /* "stop" doorbell ptr */
148 struct mcp_kreq_ether_send *req_list; /* host shadow of sendq */
149 char *req_bytes;
150 struct myri10ge_tx_buffer_state *info;
151 int mask; /* number of transmit slots -1 */
152 int req ____cacheline_aligned; /* transmit slots submitted */
153 int pkt_start; /* packets started */
154 int stop_queue;
155 int linearized;
156 int done ____cacheline_aligned; /* transmit slots completed */
157 int pkt_done; /* packets completed */
158 int wake_queue;
159 int queue_active;
160 };
161
162 struct myri10ge_rx_done {
163 struct mcp_slot *entry;
164 dma_addr_t bus;
165 int cnt;
166 int idx;
167 struct net_lro_mgr lro_mgr;
168 struct net_lro_desc lro_desc[MYRI10GE_MAX_LRO_DESCRIPTORS];
169 };
170
171 struct myri10ge_slice_netstats {
172 unsigned long rx_packets;
173 unsigned long tx_packets;
174 unsigned long rx_bytes;
175 unsigned long tx_bytes;
176 unsigned long rx_dropped;
177 unsigned long tx_dropped;
178 };
179
180 struct myri10ge_slice_state {
181 struct myri10ge_tx_buf tx; /* transmit ring */
182 struct myri10ge_rx_buf rx_small;
183 struct myri10ge_rx_buf rx_big;
184 struct myri10ge_rx_done rx_done;
185 struct net_device *dev;
186 struct napi_struct napi;
187 struct myri10ge_priv *mgp;
188 struct myri10ge_slice_netstats stats;
189 __be32 __iomem *irq_claim;
190 struct mcp_irq_data *fw_stats;
191 dma_addr_t fw_stats_bus;
192 int watchdog_tx_done;
193 int watchdog_tx_req;
194 int watchdog_rx_done;
195 #ifdef CONFIG_MYRI10GE_DCA
196 int cached_dca_tag;
197 int cpu;
198 __be32 __iomem *dca_tag;
199 #endif
200 char irq_desc[32];
201 };
202
203 struct myri10ge_priv {
204 struct myri10ge_slice_state *ss;
205 int tx_boundary; /* boundary transmits cannot cross */
206 int num_slices;
207 int running; /* running? */
208 int csum_flag; /* rx_csums? */
209 int small_bytes;
210 int big_bytes;
211 int max_intr_slots;
212 struct net_device *dev;
213 spinlock_t stats_lock;
214 u8 __iomem *sram;
215 int sram_size;
216 unsigned long board_span;
217 unsigned long iomem_base;
218 __be32 __iomem *irq_deassert;
219 char *mac_addr_string;
220 struct mcp_cmd_response *cmd;
221 dma_addr_t cmd_bus;
222 struct pci_dev *pdev;
223 int msi_enabled;
224 int msix_enabled;
225 struct msix_entry *msix_vectors;
226 #ifdef CONFIG_MYRI10GE_DCA
227 int dca_enabled;
228 #endif
229 u32 link_state;
230 unsigned int rdma_tags_available;
231 int intr_coal_delay;
232 __be32 __iomem *intr_coal_delay_ptr;
233 int mtrr;
234 int wc_enabled;
235 int down_cnt;
236 wait_queue_head_t down_wq;
237 struct work_struct watchdog_work;
238 struct timer_list watchdog_timer;
239 int watchdog_resets;
240 int watchdog_pause;
241 int pause;
242 char *fw_name;
243 char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
244 char *product_code_string;
245 char fw_version[128];
246 int fw_ver_major;
247 int fw_ver_minor;
248 int fw_ver_tiny;
249 int adopted_rx_filter_bug;
250 u8 mac_addr[6]; /* eeprom mac address */
251 unsigned long serial_number;
252 int vendor_specific_offset;
253 int fw_multicast_support;
254 unsigned long features;
255 u32 max_tso6;
256 u32 read_dma;
257 u32 write_dma;
258 u32 read_write_dma;
259 u32 link_changes;
260 u32 msg_enable;
261 unsigned int board_number;
262 int rebooted;
263 };
264
265 static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
266 static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
267 static char *myri10ge_fw_rss_unaligned = "myri10ge_rss_ethp_z8e.dat";
268 static char *myri10ge_fw_rss_aligned = "myri10ge_rss_eth_z8e.dat";
269 MODULE_FIRMWARE("myri10ge_ethp_z8e.dat");
270 MODULE_FIRMWARE("myri10ge_eth_z8e.dat");
271 MODULE_FIRMWARE("myri10ge_rss_ethp_z8e.dat");
272 MODULE_FIRMWARE("myri10ge_rss_eth_z8e.dat");
273
274 static char *myri10ge_fw_name = NULL;
275 module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR);
276 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name");
277
278 #define MYRI10GE_MAX_BOARDS 8
279 static char *myri10ge_fw_names[MYRI10GE_MAX_BOARDS] =
280 {[0 ... (MYRI10GE_MAX_BOARDS - 1)] = NULL };
281 module_param_array_named(myri10ge_fw_names, myri10ge_fw_names, charp, NULL,
282 0444);
283 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image names per board");
284
285 static int myri10ge_ecrc_enable = 1;
286 module_param(myri10ge_ecrc_enable, int, S_IRUGO);
287 MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E");
288
289 static int myri10ge_small_bytes = -1; /* -1 == auto */
290 module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR);
291 MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets");
292
293 static int myri10ge_msi = 1; /* enable msi by default */
294 module_param(myri10ge_msi, int, S_IRUGO | S_IWUSR);
295 MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts");
296
297 static int myri10ge_intr_coal_delay = 75;
298 module_param(myri10ge_intr_coal_delay, int, S_IRUGO);
299 MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay");
300
301 static int myri10ge_flow_control = 1;
302 module_param(myri10ge_flow_control, int, S_IRUGO);
303 MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter");
304
305 static int myri10ge_deassert_wait = 1;
306 module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR);
307 MODULE_PARM_DESC(myri10ge_deassert_wait,
308 "Wait when deasserting legacy interrupts");
309
310 static int myri10ge_force_firmware = 0;
311 module_param(myri10ge_force_firmware, int, S_IRUGO);
312 MODULE_PARM_DESC(myri10ge_force_firmware,
313 "Force firmware to assume aligned completions");
314
315 static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
316 module_param(myri10ge_initial_mtu, int, S_IRUGO);
317 MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU");
318
319 static int myri10ge_napi_weight = 64;
320 module_param(myri10ge_napi_weight, int, S_IRUGO);
321 MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight");
322
323 static int myri10ge_watchdog_timeout = 1;
324 module_param(myri10ge_watchdog_timeout, int, S_IRUGO);
325 MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout");
326
327 static int myri10ge_max_irq_loops = 1048576;
328 module_param(myri10ge_max_irq_loops, int, S_IRUGO);
329 MODULE_PARM_DESC(myri10ge_max_irq_loops,
330 "Set stuck legacy IRQ detection threshold");
331
332 #define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK
333
334 static int myri10ge_debug = -1; /* defaults above */
335 module_param(myri10ge_debug, int, 0);
336 MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)");
337
338 static int myri10ge_lro_max_pkts = MYRI10GE_LRO_MAX_PKTS;
339 module_param(myri10ge_lro_max_pkts, int, S_IRUGO);
340 MODULE_PARM_DESC(myri10ge_lro_max_pkts,
341 "Number of LRO packets to be aggregated");
342
343 static int myri10ge_fill_thresh = 256;
344 module_param(myri10ge_fill_thresh, int, S_IRUGO | S_IWUSR);
345 MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed");
346
347 static int myri10ge_reset_recover = 1;
348
349 static int myri10ge_max_slices = 1;
350 module_param(myri10ge_max_slices, int, S_IRUGO);
351 MODULE_PARM_DESC(myri10ge_max_slices, "Max tx/rx queues");
352
353 static int myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_DST_PORT;
354 module_param(myri10ge_rss_hash, int, S_IRUGO);
355 MODULE_PARM_DESC(myri10ge_rss_hash, "Type of RSS hashing to do");
356
357 static int myri10ge_dca = 1;
358 module_param(myri10ge_dca, int, S_IRUGO);
359 MODULE_PARM_DESC(myri10ge_dca, "Enable DCA if possible");
360
361 #define MYRI10GE_FW_OFFSET 1024*1024
362 #define MYRI10GE_HIGHPART_TO_U32(X) \
363 (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0)
364 #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X))
365
366 #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8)
367
368 static void myri10ge_set_multicast_list(struct net_device *dev);
369 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
370 struct net_device *dev);
371
372 static inline void put_be32(__be32 val, __be32 __iomem * p)
373 {
374 __raw_writel((__force __u32) val, (__force void __iomem *)p);
375 }
376
377 static struct net_device_stats *myri10ge_get_stats(struct net_device *dev);
378
379 static int
380 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
381 struct myri10ge_cmd *data, int atomic)
382 {
383 struct mcp_cmd *buf;
384 char buf_bytes[sizeof(*buf) + 8];
385 struct mcp_cmd_response *response = mgp->cmd;
386 char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD;
387 u32 dma_low, dma_high, result, value;
388 int sleep_total = 0;
389
390 /* ensure buf is aligned to 8 bytes */
391 buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8);
392
393 buf->data0 = htonl(data->data0);
394 buf->data1 = htonl(data->data1);
395 buf->data2 = htonl(data->data2);
396 buf->cmd = htonl(cmd);
397 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
398 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
399
400 buf->response_addr.low = htonl(dma_low);
401 buf->response_addr.high = htonl(dma_high);
402 response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT);
403 mb();
404 myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf));
405
406 /* wait up to 15ms. Longest command is the DMA benchmark,
407 * which is capped at 5ms, but runs from a timeout handler
408 * that runs every 7.8ms. So a 15ms timeout leaves us with
409 * a 2.2ms margin
410 */
411 if (atomic) {
412 /* if atomic is set, do not sleep,
413 * and try to get the completion quickly
414 * (1ms will be enough for those commands) */
415 for (sleep_total = 0;
416 sleep_total < 1000 &&
417 response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
418 sleep_total += 10) {
419 udelay(10);
420 mb();
421 }
422 } else {
423 /* use msleep for most command */
424 for (sleep_total = 0;
425 sleep_total < 15 &&
426 response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
427 sleep_total++)
428 msleep(1);
429 }
430
431 result = ntohl(response->result);
432 value = ntohl(response->data);
433 if (result != MYRI10GE_NO_RESPONSE_RESULT) {
434 if (result == 0) {
435 data->data0 = value;
436 return 0;
437 } else if (result == MXGEFW_CMD_UNKNOWN) {
438 return -ENOSYS;
439 } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) {
440 return -E2BIG;
441 } else if (result == MXGEFW_CMD_ERROR_RANGE &&
442 cmd == MXGEFW_CMD_ENABLE_RSS_QUEUES &&
443 (data->
444 data1 & MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES) !=
445 0) {
446 return -ERANGE;
447 } else {
448 dev_err(&mgp->pdev->dev,
449 "command %d failed, result = %d\n",
450 cmd, result);
451 return -ENXIO;
452 }
453 }
454
455 dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
456 cmd, result);
457 return -EAGAIN;
458 }
459
460 /*
461 * The eeprom strings on the lanaiX have the format
462 * SN=x\0
463 * MAC=x:x:x:x:x:x\0
464 * PT:ddd mmm xx xx:xx:xx xx\0
465 * PV:ddd mmm xx xx:xx:xx xx\0
466 */
467 static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp)
468 {
469 char *ptr, *limit;
470 int i;
471
472 ptr = mgp->eeprom_strings;
473 limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE;
474
475 while (*ptr != '\0' && ptr < limit) {
476 if (memcmp(ptr, "MAC=", 4) == 0) {
477 ptr += 4;
478 mgp->mac_addr_string = ptr;
479 for (i = 0; i < 6; i++) {
480 if ((ptr + 2) > limit)
481 goto abort;
482 mgp->mac_addr[i] =
483 simple_strtoul(ptr, &ptr, 16);
484 ptr += 1;
485 }
486 }
487 if (memcmp(ptr, "PC=", 3) == 0) {
488 ptr += 3;
489 mgp->product_code_string = ptr;
490 }
491 if (memcmp((const void *)ptr, "SN=", 3) == 0) {
492 ptr += 3;
493 mgp->serial_number = simple_strtoul(ptr, &ptr, 10);
494 }
495 while (ptr < limit && *ptr++) ;
496 }
497
498 return 0;
499
500 abort:
501 dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n");
502 return -ENXIO;
503 }
504
505 /*
506 * Enable or disable periodic RDMAs from the host to make certain
507 * chipsets resend dropped PCIe messages
508 */
509
510 static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable)
511 {
512 char __iomem *submit;
513 __be32 buf[16] __attribute__ ((__aligned__(8)));
514 u32 dma_low, dma_high;
515 int i;
516
517 /* clear confirmation addr */
518 mgp->cmd->data = 0;
519 mb();
520
521 /* send a rdma command to the PCIe engine, and wait for the
522 * response in the confirmation address. The firmware should
523 * write a -1 there to indicate it is alive and well
524 */
525 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
526 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
527
528 buf[0] = htonl(dma_high); /* confirm addr MSW */
529 buf[1] = htonl(dma_low); /* confirm addr LSW */
530 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */
531 buf[3] = htonl(dma_high); /* dummy addr MSW */
532 buf[4] = htonl(dma_low); /* dummy addr LSW */
533 buf[5] = htonl(enable); /* enable? */
534
535 submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA;
536
537 myri10ge_pio_copy(submit, &buf, sizeof(buf));
538 for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++)
539 msleep(1);
540 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA)
541 dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n",
542 (enable ? "enable" : "disable"));
543 }
544
545 static int
546 myri10ge_validate_firmware(struct myri10ge_priv *mgp,
547 struct mcp_gen_header *hdr)
548 {
549 struct device *dev = &mgp->pdev->dev;
550
551 /* check firmware type */
552 if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) {
553 dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type));
554 return -EINVAL;
555 }
556
557 /* save firmware version for ethtool */
558 strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
559
560 sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major,
561 &mgp->fw_ver_minor, &mgp->fw_ver_tiny);
562
563 if (!(mgp->fw_ver_major == MXGEFW_VERSION_MAJOR &&
564 mgp->fw_ver_minor == MXGEFW_VERSION_MINOR)) {
565 dev_err(dev, "Found firmware version %s\n", mgp->fw_version);
566 dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR,
567 MXGEFW_VERSION_MINOR);
568 return -EINVAL;
569 }
570 return 0;
571 }
572
573 static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
574 {
575 unsigned crc, reread_crc;
576 const struct firmware *fw;
577 struct device *dev = &mgp->pdev->dev;
578 unsigned char *fw_readback;
579 struct mcp_gen_header *hdr;
580 size_t hdr_offset;
581 int status;
582 unsigned i;
583
584 if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) {
585 dev_err(dev, "Unable to load %s firmware image via hotplug\n",
586 mgp->fw_name);
587 status = -EINVAL;
588 goto abort_with_nothing;
589 }
590
591 /* check size */
592
593 if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET ||
594 fw->size < MCP_HEADER_PTR_OFFSET + 4) {
595 dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size);
596 status = -EINVAL;
597 goto abort_with_fw;
598 }
599
600 /* check id */
601 hdr_offset = ntohl(*(__be32 *) (fw->data + MCP_HEADER_PTR_OFFSET));
602 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) {
603 dev_err(dev, "Bad firmware file\n");
604 status = -EINVAL;
605 goto abort_with_fw;
606 }
607 hdr = (void *)(fw->data + hdr_offset);
608
609 status = myri10ge_validate_firmware(mgp, hdr);
610 if (status != 0)
611 goto abort_with_fw;
612
613 crc = crc32(~0, fw->data, fw->size);
614 for (i = 0; i < fw->size; i += 256) {
615 myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i,
616 fw->data + i,
617 min(256U, (unsigned)(fw->size - i)));
618 mb();
619 readb(mgp->sram);
620 }
621 fw_readback = vmalloc(fw->size);
622 if (!fw_readback) {
623 status = -ENOMEM;
624 goto abort_with_fw;
625 }
626 /* corruption checking is good for parity recovery and buggy chipset */
627 memcpy_fromio(fw_readback, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);
628 reread_crc = crc32(~0, fw_readback, fw->size);
629 vfree(fw_readback);
630 if (crc != reread_crc) {
631 dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n",
632 (unsigned)fw->size, reread_crc, crc);
633 status = -EIO;
634 goto abort_with_fw;
635 }
636 *size = (u32) fw->size;
637
638 abort_with_fw:
639 release_firmware(fw);
640
641 abort_with_nothing:
642 return status;
643 }
644
645 static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp)
646 {
647 struct mcp_gen_header *hdr;
648 struct device *dev = &mgp->pdev->dev;
649 const size_t bytes = sizeof(struct mcp_gen_header);
650 size_t hdr_offset;
651 int status;
652
653 /* find running firmware header */
654 hdr_offset = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
655
656 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) {
657 dev_err(dev, "Running firmware has bad header offset (%d)\n",
658 (int)hdr_offset);
659 return -EIO;
660 }
661
662 /* copy header of running firmware from SRAM to host memory to
663 * validate firmware */
664 hdr = kmalloc(bytes, GFP_KERNEL);
665 if (hdr == NULL) {
666 dev_err(dev, "could not malloc firmware hdr\n");
667 return -ENOMEM;
668 }
669 memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes);
670 status = myri10ge_validate_firmware(mgp, hdr);
671 kfree(hdr);
672
673 /* check to see if adopted firmware has bug where adopting
674 * it will cause broadcasts to be filtered unless the NIC
675 * is kept in ALLMULTI mode */
676 if (mgp->fw_ver_major == 1 && mgp->fw_ver_minor == 4 &&
677 mgp->fw_ver_tiny >= 4 && mgp->fw_ver_tiny <= 11) {
678 mgp->adopted_rx_filter_bug = 1;
679 dev_warn(dev, "Adopting fw %d.%d.%d: "
680 "working around rx filter bug\n",
681 mgp->fw_ver_major, mgp->fw_ver_minor,
682 mgp->fw_ver_tiny);
683 }
684 return status;
685 }
686
687 static int myri10ge_get_firmware_capabilities(struct myri10ge_priv *mgp)
688 {
689 struct myri10ge_cmd cmd;
690 int status;
691
692 /* probe for IPv6 TSO support */
693 mgp->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
694 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_TSO6_HDR_SIZE,
695 &cmd, 0);
696 if (status == 0) {
697 mgp->max_tso6 = cmd.data0;
698 mgp->features |= NETIF_F_TSO6;
699 }
700
701 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
702 if (status != 0) {
703 dev_err(&mgp->pdev->dev,
704 "failed MXGEFW_CMD_GET_RX_RING_SIZE\n");
705 return -ENXIO;
706 }
707
708 mgp->max_intr_slots = 2 * (cmd.data0 / sizeof(struct mcp_dma_addr));
709
710 return 0;
711 }
712
713 static int myri10ge_load_firmware(struct myri10ge_priv *mgp, int adopt)
714 {
715 char __iomem *submit;
716 __be32 buf[16] __attribute__ ((__aligned__(8)));
717 u32 dma_low, dma_high, size;
718 int status, i;
719
720 size = 0;
721 status = myri10ge_load_hotplug_firmware(mgp, &size);
722 if (status) {
723 if (!adopt)
724 return status;
725 dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n");
726
727 /* Do not attempt to adopt firmware if there
728 * was a bad crc */
729 if (status == -EIO)
730 return status;
731
732 status = myri10ge_adopt_running_firmware(mgp);
733 if (status != 0) {
734 dev_err(&mgp->pdev->dev,
735 "failed to adopt running firmware\n");
736 return status;
737 }
738 dev_info(&mgp->pdev->dev,
739 "Successfully adopted running firmware\n");
740 if (mgp->tx_boundary == 4096) {
741 dev_warn(&mgp->pdev->dev,
742 "Using firmware currently running on NIC"
743 ". For optimal\n");
744 dev_warn(&mgp->pdev->dev,
745 "performance consider loading optimized "
746 "firmware\n");
747 dev_warn(&mgp->pdev->dev, "via hotplug\n");
748 }
749
750 mgp->fw_name = "adopted";
751 mgp->tx_boundary = 2048;
752 myri10ge_dummy_rdma(mgp, 1);
753 status = myri10ge_get_firmware_capabilities(mgp);
754 return status;
755 }
756
757 /* clear confirmation addr */
758 mgp->cmd->data = 0;
759 mb();
760
761 /* send a reload command to the bootstrap MCP, and wait for the
762 * response in the confirmation address. The firmware should
763 * write a -1 there to indicate it is alive and well
764 */
765 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
766 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
767
768 buf[0] = htonl(dma_high); /* confirm addr MSW */
769 buf[1] = htonl(dma_low); /* confirm addr LSW */
770 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */
771
772 /* FIX: All newest firmware should un-protect the bottom of
773 * the sram before handoff. However, the very first interfaces
774 * do not. Therefore the handoff copy must skip the first 8 bytes
775 */
776 buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */
777 buf[4] = htonl(size - 8); /* length of code */
778 buf[5] = htonl(8); /* where to copy to */
779 buf[6] = htonl(0); /* where to jump to */
780
781 submit = mgp->sram + MXGEFW_BOOT_HANDOFF;
782
783 myri10ge_pio_copy(submit, &buf, sizeof(buf));
784 mb();
785 msleep(1);
786 mb();
787 i = 0;
788 while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 9) {
789 msleep(1 << i);
790 i++;
791 }
792 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) {
793 dev_err(&mgp->pdev->dev, "handoff failed\n");
794 return -ENXIO;
795 }
796 myri10ge_dummy_rdma(mgp, 1);
797 status = myri10ge_get_firmware_capabilities(mgp);
798
799 return status;
800 }
801
802 static int myri10ge_update_mac_address(struct myri10ge_priv *mgp, u8 * addr)
803 {
804 struct myri10ge_cmd cmd;
805 int status;
806
807 cmd.data0 = ((addr[0] << 24) | (addr[1] << 16)
808 | (addr[2] << 8) | addr[3]);
809
810 cmd.data1 = ((addr[4] << 8) | (addr[5]));
811
812 status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0);
813 return status;
814 }
815
816 static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause)
817 {
818 struct myri10ge_cmd cmd;
819 int status, ctl;
820
821 ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL;
822 status = myri10ge_send_cmd(mgp, ctl, &cmd, 0);
823
824 if (status) {
825 netdev_err(mgp->dev, "Failed to set flow control mode\n");
826 return status;
827 }
828 mgp->pause = pause;
829 return 0;
830 }
831
832 static void
833 myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic)
834 {
835 struct myri10ge_cmd cmd;
836 int status, ctl;
837
838 ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC;
839 status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic);
840 if (status)
841 netdev_err(mgp->dev, "Failed to set promisc mode\n");
842 }
843
844 static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type)
845 {
846 struct myri10ge_cmd cmd;
847 int status;
848 u32 len;
849 struct page *dmatest_page;
850 dma_addr_t dmatest_bus;
851 char *test = " ";
852
853 dmatest_page = alloc_page(GFP_KERNEL);
854 if (!dmatest_page)
855 return -ENOMEM;
856 dmatest_bus = pci_map_page(mgp->pdev, dmatest_page, 0, PAGE_SIZE,
857 DMA_BIDIRECTIONAL);
858
859 /* Run a small DMA test.
860 * The magic multipliers to the length tell the firmware
861 * to do DMA read, write, or read+write tests. The
862 * results are returned in cmd.data0. The upper 16
863 * bits or the return is the number of transfers completed.
864 * The lower 16 bits is the time in 0.5us ticks that the
865 * transfers took to complete.
866 */
867
868 len = mgp->tx_boundary;
869
870 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
871 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
872 cmd.data2 = len * 0x10000;
873 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
874 if (status != 0) {
875 test = "read";
876 goto abort;
877 }
878 mgp->read_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
879 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
880 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
881 cmd.data2 = len * 0x1;
882 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
883 if (status != 0) {
884 test = "write";
885 goto abort;
886 }
887 mgp->write_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
888
889 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
890 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
891 cmd.data2 = len * 0x10001;
892 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
893 if (status != 0) {
894 test = "read/write";
895 goto abort;
896 }
897 mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) /
898 (cmd.data0 & 0xffff);
899
900 abort:
901 pci_unmap_page(mgp->pdev, dmatest_bus, PAGE_SIZE, DMA_BIDIRECTIONAL);
902 put_page(dmatest_page);
903
904 if (status != 0 && test_type != MXGEFW_CMD_UNALIGNED_TEST)
905 dev_warn(&mgp->pdev->dev, "DMA %s benchmark failed: %d\n",
906 test, status);
907
908 return status;
909 }
910
911 static int myri10ge_reset(struct myri10ge_priv *mgp)
912 {
913 struct myri10ge_cmd cmd;
914 struct myri10ge_slice_state *ss;
915 int i, status;
916 size_t bytes;
917 #ifdef CONFIG_MYRI10GE_DCA
918 unsigned long dca_tag_off;
919 #endif
920
921 /* try to send a reset command to the card to see if it
922 * is alive */
923 memset(&cmd, 0, sizeof(cmd));
924 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
925 if (status != 0) {
926 dev_err(&mgp->pdev->dev, "failed reset\n");
927 return -ENXIO;
928 }
929
930 (void)myri10ge_dma_test(mgp, MXGEFW_DMA_TEST);
931 /*
932 * Use non-ndis mcp_slot (eg, 4 bytes total,
933 * no toeplitz hash value returned. Older firmware will
934 * not understand this command, but will use the correct
935 * sized mcp_slot, so we ignore error returns
936 */
937 cmd.data0 = MXGEFW_RSS_MCP_SLOT_TYPE_MIN;
938 (void)myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_MCP_SLOT_TYPE, &cmd, 0);
939
940 /* Now exchange information about interrupts */
941
942 bytes = mgp->max_intr_slots * sizeof(*mgp->ss[0].rx_done.entry);
943 cmd.data0 = (u32) bytes;
944 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
945
946 /*
947 * Even though we already know how many slices are supported
948 * via myri10ge_probe_slices() MXGEFW_CMD_GET_MAX_RSS_QUEUES
949 * has magic side effects, and must be called after a reset.
950 * It must be called prior to calling any RSS related cmds,
951 * including assigning an interrupt queue for anything but
952 * slice 0. It must also be called *after*
953 * MXGEFW_CMD_SET_INTRQ_SIZE, since the intrq size is used by
954 * the firmware to compute offsets.
955 */
956
957 if (mgp->num_slices > 1) {
958
959 /* ask the maximum number of slices it supports */
960 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES,
961 &cmd, 0);
962 if (status != 0) {
963 dev_err(&mgp->pdev->dev,
964 "failed to get number of slices\n");
965 }
966
967 /*
968 * MXGEFW_CMD_ENABLE_RSS_QUEUES must be called prior
969 * to setting up the interrupt queue DMA
970 */
971
972 cmd.data0 = mgp->num_slices;
973 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
974 if (mgp->dev->real_num_tx_queues > 1)
975 cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
976 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
977 &cmd, 0);
978
979 /* Firmware older than 1.4.32 only supports multiple
980 * RX queues, so if we get an error, first retry using a
981 * single TX queue before giving up */
982 if (status != 0 && mgp->dev->real_num_tx_queues > 1) {
983 mgp->dev->real_num_tx_queues = 1;
984 cmd.data0 = mgp->num_slices;
985 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
986 status = myri10ge_send_cmd(mgp,
987 MXGEFW_CMD_ENABLE_RSS_QUEUES,
988 &cmd, 0);
989 }
990
991 if (status != 0) {
992 dev_err(&mgp->pdev->dev,
993 "failed to set number of slices\n");
994
995 return status;
996 }
997 }
998 for (i = 0; i < mgp->num_slices; i++) {
999 ss = &mgp->ss[i];
1000 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->rx_done.bus);
1001 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->rx_done.bus);
1002 cmd.data2 = i;
1003 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA,
1004 &cmd, 0);
1005 };
1006
1007 status |=
1008 myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0);
1009 for (i = 0; i < mgp->num_slices; i++) {
1010 ss = &mgp->ss[i];
1011 ss->irq_claim =
1012 (__iomem __be32 *) (mgp->sram + cmd.data0 + 8 * i);
1013 }
1014 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET,
1015 &cmd, 0);
1016 mgp->irq_deassert = (__iomem __be32 *) (mgp->sram + cmd.data0);
1017
1018 status |= myri10ge_send_cmd
1019 (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0);
1020 mgp->intr_coal_delay_ptr = (__iomem __be32 *) (mgp->sram + cmd.data0);
1021 if (status != 0) {
1022 dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n");
1023 return status;
1024 }
1025 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1026
1027 #ifdef CONFIG_MYRI10GE_DCA
1028 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_DCA_OFFSET, &cmd, 0);
1029 dca_tag_off = cmd.data0;
1030 for (i = 0; i < mgp->num_slices; i++) {
1031 ss = &mgp->ss[i];
1032 if (status == 0) {
1033 ss->dca_tag = (__iomem __be32 *)
1034 (mgp->sram + dca_tag_off + 4 * i);
1035 } else {
1036 ss->dca_tag = NULL;
1037 }
1038 }
1039 #endif /* CONFIG_MYRI10GE_DCA */
1040
1041 /* reset mcp/driver shared state back to 0 */
1042
1043 mgp->link_changes = 0;
1044 for (i = 0; i < mgp->num_slices; i++) {
1045 ss = &mgp->ss[i];
1046
1047 memset(ss->rx_done.entry, 0, bytes);
1048 ss->tx.req = 0;
1049 ss->tx.done = 0;
1050 ss->tx.pkt_start = 0;
1051 ss->tx.pkt_done = 0;
1052 ss->rx_big.cnt = 0;
1053 ss->rx_small.cnt = 0;
1054 ss->rx_done.idx = 0;
1055 ss->rx_done.cnt = 0;
1056 ss->tx.wake_queue = 0;
1057 ss->tx.stop_queue = 0;
1058 }
1059
1060 status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr);
1061 myri10ge_change_pause(mgp, mgp->pause);
1062 myri10ge_set_multicast_list(mgp->dev);
1063 return status;
1064 }
1065
1066 #ifdef CONFIG_MYRI10GE_DCA
1067 static void
1068 myri10ge_write_dca(struct myri10ge_slice_state *ss, int cpu, int tag)
1069 {
1070 ss->cpu = cpu;
1071 ss->cached_dca_tag = tag;
1072 put_be32(htonl(tag), ss->dca_tag);
1073 }
1074
1075 static inline void myri10ge_update_dca(struct myri10ge_slice_state *ss)
1076 {
1077 int cpu = get_cpu();
1078 int tag;
1079
1080 if (cpu != ss->cpu) {
1081 tag = dca_get_tag(cpu);
1082 if (ss->cached_dca_tag != tag)
1083 myri10ge_write_dca(ss, cpu, tag);
1084 }
1085 put_cpu();
1086 }
1087
1088 static void myri10ge_setup_dca(struct myri10ge_priv *mgp)
1089 {
1090 int err, i;
1091 struct pci_dev *pdev = mgp->pdev;
1092
1093 if (mgp->ss[0].dca_tag == NULL || mgp->dca_enabled)
1094 return;
1095 if (!myri10ge_dca) {
1096 dev_err(&pdev->dev, "dca disabled by administrator\n");
1097 return;
1098 }
1099 err = dca_add_requester(&pdev->dev);
1100 if (err) {
1101 if (err != -ENODEV)
1102 dev_err(&pdev->dev,
1103 "dca_add_requester() failed, err=%d\n", err);
1104 return;
1105 }
1106 mgp->dca_enabled = 1;
1107 for (i = 0; i < mgp->num_slices; i++)
1108 myri10ge_write_dca(&mgp->ss[i], -1, 0);
1109 }
1110
1111 static void myri10ge_teardown_dca(struct myri10ge_priv *mgp)
1112 {
1113 struct pci_dev *pdev = mgp->pdev;
1114 int err;
1115
1116 if (!mgp->dca_enabled)
1117 return;
1118 mgp->dca_enabled = 0;
1119 err = dca_remove_requester(&pdev->dev);
1120 }
1121
1122 static int myri10ge_notify_dca_device(struct device *dev, void *data)
1123 {
1124 struct myri10ge_priv *mgp;
1125 unsigned long event;
1126
1127 mgp = dev_get_drvdata(dev);
1128 event = *(unsigned long *)data;
1129
1130 if (event == DCA_PROVIDER_ADD)
1131 myri10ge_setup_dca(mgp);
1132 else if (event == DCA_PROVIDER_REMOVE)
1133 myri10ge_teardown_dca(mgp);
1134 return 0;
1135 }
1136 #endif /* CONFIG_MYRI10GE_DCA */
1137
1138 static inline void
1139 myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst,
1140 struct mcp_kreq_ether_recv *src)
1141 {
1142 __be32 low;
1143
1144 low = src->addr_low;
1145 src->addr_low = htonl(DMA_BIT_MASK(32));
1146 myri10ge_pio_copy(dst, src, 4 * sizeof(*src));
1147 mb();
1148 myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src));
1149 mb();
1150 src->addr_low = low;
1151 put_be32(low, &dst->addr_low);
1152 mb();
1153 }
1154
1155 static inline void myri10ge_vlan_ip_csum(struct sk_buff *skb, __wsum hw_csum)
1156 {
1157 struct vlan_hdr *vh = (struct vlan_hdr *)(skb->data);
1158
1159 if ((skb->protocol == htons(ETH_P_8021Q)) &&
1160 (vh->h_vlan_encapsulated_proto == htons(ETH_P_IP) ||
1161 vh->h_vlan_encapsulated_proto == htons(ETH_P_IPV6))) {
1162 skb->csum = hw_csum;
1163 skb->ip_summed = CHECKSUM_COMPLETE;
1164 }
1165 }
1166
1167 static inline void
1168 myri10ge_rx_skb_build(struct sk_buff *skb, u8 * va,
1169 struct skb_frag_struct *rx_frags, int len, int hlen)
1170 {
1171 struct skb_frag_struct *skb_frags;
1172
1173 skb->len = skb->data_len = len;
1174 skb->truesize = len + sizeof(struct sk_buff);
1175 /* attach the page(s) */
1176
1177 skb_frags = skb_shinfo(skb)->frags;
1178 while (len > 0) {
1179 memcpy(skb_frags, rx_frags, sizeof(*skb_frags));
1180 len -= rx_frags->size;
1181 skb_frags++;
1182 rx_frags++;
1183 skb_shinfo(skb)->nr_frags++;
1184 }
1185
1186 /* pskb_may_pull is not available in irq context, but
1187 * skb_pull() (for ether_pad and eth_type_trans()) requires
1188 * the beginning of the packet in skb_headlen(), move it
1189 * manually */
1190 skb_copy_to_linear_data(skb, va, hlen);
1191 skb_shinfo(skb)->frags[0].page_offset += hlen;
1192 skb_shinfo(skb)->frags[0].size -= hlen;
1193 skb->data_len -= hlen;
1194 skb->tail += hlen;
1195 skb_pull(skb, MXGEFW_PAD);
1196 }
1197
1198 static void
1199 myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
1200 int bytes, int watchdog)
1201 {
1202 struct page *page;
1203 int idx;
1204 #if MYRI10GE_ALLOC_SIZE > 4096
1205 int end_offset;
1206 #endif
1207
1208 if (unlikely(rx->watchdog_needed && !watchdog))
1209 return;
1210
1211 /* try to refill entire ring */
1212 while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) {
1213 idx = rx->fill_cnt & rx->mask;
1214 if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) {
1215 /* we can use part of previous page */
1216 get_page(rx->page);
1217 } else {
1218 /* we need a new page */
1219 page =
1220 alloc_pages(GFP_ATOMIC | __GFP_COMP,
1221 MYRI10GE_ALLOC_ORDER);
1222 if (unlikely(page == NULL)) {
1223 if (rx->fill_cnt - rx->cnt < 16)
1224 rx->watchdog_needed = 1;
1225 return;
1226 }
1227 rx->page = page;
1228 rx->page_offset = 0;
1229 rx->bus = pci_map_page(mgp->pdev, page, 0,
1230 MYRI10GE_ALLOC_SIZE,
1231 PCI_DMA_FROMDEVICE);
1232 }
1233 rx->info[idx].page = rx->page;
1234 rx->info[idx].page_offset = rx->page_offset;
1235 /* note that this is the address of the start of the
1236 * page */
1237 pci_unmap_addr_set(&rx->info[idx], bus, rx->bus);
1238 rx->shadow[idx].addr_low =
1239 htonl(MYRI10GE_LOWPART_TO_U32(rx->bus) + rx->page_offset);
1240 rx->shadow[idx].addr_high =
1241 htonl(MYRI10GE_HIGHPART_TO_U32(rx->bus));
1242
1243 /* start next packet on a cacheline boundary */
1244 rx->page_offset += SKB_DATA_ALIGN(bytes);
1245
1246 #if MYRI10GE_ALLOC_SIZE > 4096
1247 /* don't cross a 4KB boundary */
1248 end_offset = rx->page_offset + bytes - 1;
1249 if ((unsigned)(rx->page_offset ^ end_offset) > 4095)
1250 rx->page_offset = end_offset & ~4095;
1251 #endif
1252 rx->fill_cnt++;
1253
1254 /* copy 8 descriptors to the firmware at a time */
1255 if ((idx & 7) == 7) {
1256 myri10ge_submit_8rx(&rx->lanai[idx - 7],
1257 &rx->shadow[idx - 7]);
1258 }
1259 }
1260 }
1261
1262 static inline void
1263 myri10ge_unmap_rx_page(struct pci_dev *pdev,
1264 struct myri10ge_rx_buffer_state *info, int bytes)
1265 {
1266 /* unmap the recvd page if we're the only or last user of it */
1267 if (bytes >= MYRI10GE_ALLOC_SIZE / 2 ||
1268 (info->page_offset + 2 * bytes) > MYRI10GE_ALLOC_SIZE) {
1269 pci_unmap_page(pdev, (pci_unmap_addr(info, bus)
1270 & ~(MYRI10GE_ALLOC_SIZE - 1)),
1271 MYRI10GE_ALLOC_SIZE, PCI_DMA_FROMDEVICE);
1272 }
1273 }
1274
1275 #define MYRI10GE_HLEN 64 /* The number of bytes to copy from a
1276 * page into an skb */
1277
1278 static inline int
1279 myri10ge_rx_done(struct myri10ge_slice_state *ss, struct myri10ge_rx_buf *rx,
1280 int bytes, int len, __wsum csum)
1281 {
1282 struct myri10ge_priv *mgp = ss->mgp;
1283 struct sk_buff *skb;
1284 struct skb_frag_struct rx_frags[MYRI10GE_MAX_FRAGS_PER_FRAME];
1285 int i, idx, hlen, remainder;
1286 struct pci_dev *pdev = mgp->pdev;
1287 struct net_device *dev = mgp->dev;
1288 u8 *va;
1289
1290 len += MXGEFW_PAD;
1291 idx = rx->cnt & rx->mask;
1292 va = page_address(rx->info[idx].page) + rx->info[idx].page_offset;
1293 prefetch(va);
1294 /* Fill skb_frag_struct(s) with data from our receive */
1295 for (i = 0, remainder = len; remainder > 0; i++) {
1296 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1297 rx_frags[i].page = rx->info[idx].page;
1298 rx_frags[i].page_offset = rx->info[idx].page_offset;
1299 if (remainder < MYRI10GE_ALLOC_SIZE)
1300 rx_frags[i].size = remainder;
1301 else
1302 rx_frags[i].size = MYRI10GE_ALLOC_SIZE;
1303 rx->cnt++;
1304 idx = rx->cnt & rx->mask;
1305 remainder -= MYRI10GE_ALLOC_SIZE;
1306 }
1307
1308 if (dev->features & NETIF_F_LRO) {
1309 rx_frags[0].page_offset += MXGEFW_PAD;
1310 rx_frags[0].size -= MXGEFW_PAD;
1311 len -= MXGEFW_PAD;
1312 lro_receive_frags(&ss->rx_done.lro_mgr, rx_frags,
1313 /* opaque, will come back in get_frag_header */
1314 len, len,
1315 (void *)(__force unsigned long)csum, csum);
1316
1317 return 1;
1318 }
1319
1320 hlen = MYRI10GE_HLEN > len ? len : MYRI10GE_HLEN;
1321
1322 /* allocate an skb to attach the page(s) to. This is done
1323 * after trying LRO, so as to avoid skb allocation overheads */
1324
1325 skb = netdev_alloc_skb(dev, MYRI10GE_HLEN + 16);
1326 if (unlikely(skb == NULL)) {
1327 ss->stats.rx_dropped++;
1328 do {
1329 i--;
1330 put_page(rx_frags[i].page);
1331 } while (i != 0);
1332 return 0;
1333 }
1334
1335 /* Attach the pages to the skb, and trim off any padding */
1336 myri10ge_rx_skb_build(skb, va, rx_frags, len, hlen);
1337 if (skb_shinfo(skb)->frags[0].size <= 0) {
1338 put_page(skb_shinfo(skb)->frags[0].page);
1339 skb_shinfo(skb)->nr_frags = 0;
1340 }
1341 skb->protocol = eth_type_trans(skb, dev);
1342 skb_record_rx_queue(skb, ss - &mgp->ss[0]);
1343
1344 if (mgp->csum_flag) {
1345 if ((skb->protocol == htons(ETH_P_IP)) ||
1346 (skb->protocol == htons(ETH_P_IPV6))) {
1347 skb->csum = csum;
1348 skb->ip_summed = CHECKSUM_COMPLETE;
1349 } else
1350 myri10ge_vlan_ip_csum(skb, csum);
1351 }
1352 netif_receive_skb(skb);
1353 return 1;
1354 }
1355
1356 static inline void
1357 myri10ge_tx_done(struct myri10ge_slice_state *ss, int mcp_index)
1358 {
1359 struct pci_dev *pdev = ss->mgp->pdev;
1360 struct myri10ge_tx_buf *tx = &ss->tx;
1361 struct netdev_queue *dev_queue;
1362 struct sk_buff *skb;
1363 int idx, len;
1364
1365 while (tx->pkt_done != mcp_index) {
1366 idx = tx->done & tx->mask;
1367 skb = tx->info[idx].skb;
1368
1369 /* Mark as free */
1370 tx->info[idx].skb = NULL;
1371 if (tx->info[idx].last) {
1372 tx->pkt_done++;
1373 tx->info[idx].last = 0;
1374 }
1375 tx->done++;
1376 len = pci_unmap_len(&tx->info[idx], len);
1377 pci_unmap_len_set(&tx->info[idx], len, 0);
1378 if (skb) {
1379 ss->stats.tx_bytes += skb->len;
1380 ss->stats.tx_packets++;
1381 dev_kfree_skb_irq(skb);
1382 if (len)
1383 pci_unmap_single(pdev,
1384 pci_unmap_addr(&tx->info[idx],
1385 bus), len,
1386 PCI_DMA_TODEVICE);
1387 } else {
1388 if (len)
1389 pci_unmap_page(pdev,
1390 pci_unmap_addr(&tx->info[idx],
1391 bus), len,
1392 PCI_DMA_TODEVICE);
1393 }
1394 }
1395
1396 dev_queue = netdev_get_tx_queue(ss->dev, ss - ss->mgp->ss);
1397 /*
1398 * Make a minimal effort to prevent the NIC from polling an
1399 * idle tx queue. If we can't get the lock we leave the queue
1400 * active. In this case, either a thread was about to start
1401 * using the queue anyway, or we lost a race and the NIC will
1402 * waste some of its resources polling an inactive queue for a
1403 * while.
1404 */
1405
1406 if ((ss->mgp->dev->real_num_tx_queues > 1) &&
1407 __netif_tx_trylock(dev_queue)) {
1408 if (tx->req == tx->done) {
1409 tx->queue_active = 0;
1410 put_be32(htonl(1), tx->send_stop);
1411 mb();
1412 mmiowb();
1413 }
1414 __netif_tx_unlock(dev_queue);
1415 }
1416
1417 /* start the queue if we've stopped it */
1418 if (netif_tx_queue_stopped(dev_queue) &&
1419 tx->req - tx->done < (tx->mask >> 1)) {
1420 tx->wake_queue++;
1421 netif_tx_wake_queue(dev_queue);
1422 }
1423 }
1424
1425 static inline int
1426 myri10ge_clean_rx_done(struct myri10ge_slice_state *ss, int budget)
1427 {
1428 struct myri10ge_rx_done *rx_done = &ss->rx_done;
1429 struct myri10ge_priv *mgp = ss->mgp;
1430 struct net_device *netdev = mgp->dev;
1431 unsigned long rx_bytes = 0;
1432 unsigned long rx_packets = 0;
1433 unsigned long rx_ok;
1434
1435 int idx = rx_done->idx;
1436 int cnt = rx_done->cnt;
1437 int work_done = 0;
1438 u16 length;
1439 __wsum checksum;
1440
1441 while (rx_done->entry[idx].length != 0 && work_done < budget) {
1442 length = ntohs(rx_done->entry[idx].length);
1443 rx_done->entry[idx].length = 0;
1444 checksum = csum_unfold(rx_done->entry[idx].checksum);
1445 if (length <= mgp->small_bytes)
1446 rx_ok = myri10ge_rx_done(ss, &ss->rx_small,
1447 mgp->small_bytes,
1448 length, checksum);
1449 else
1450 rx_ok = myri10ge_rx_done(ss, &ss->rx_big,
1451 mgp->big_bytes,
1452 length, checksum);
1453 rx_packets += rx_ok;
1454 rx_bytes += rx_ok * (unsigned long)length;
1455 cnt++;
1456 idx = cnt & (mgp->max_intr_slots - 1);
1457 work_done++;
1458 }
1459 rx_done->idx = idx;
1460 rx_done->cnt = cnt;
1461 ss->stats.rx_packets += rx_packets;
1462 ss->stats.rx_bytes += rx_bytes;
1463
1464 if (netdev->features & NETIF_F_LRO)
1465 lro_flush_all(&rx_done->lro_mgr);
1466
1467 /* restock receive rings if needed */
1468 if (ss->rx_small.fill_cnt - ss->rx_small.cnt < myri10ge_fill_thresh)
1469 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
1470 mgp->small_bytes + MXGEFW_PAD, 0);
1471 if (ss->rx_big.fill_cnt - ss->rx_big.cnt < myri10ge_fill_thresh)
1472 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
1473
1474 return work_done;
1475 }
1476
1477 static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
1478 {
1479 struct mcp_irq_data *stats = mgp->ss[0].fw_stats;
1480
1481 if (unlikely(stats->stats_updated)) {
1482 unsigned link_up = ntohl(stats->link_up);
1483 if (mgp->link_state != link_up) {
1484 mgp->link_state = link_up;
1485
1486 if (mgp->link_state == MXGEFW_LINK_UP) {
1487 if (netif_msg_link(mgp))
1488 netdev_info(mgp->dev, "link up\n");
1489 netif_carrier_on(mgp->dev);
1490 mgp->link_changes++;
1491 } else {
1492 if (netif_msg_link(mgp))
1493 netdev_info(mgp->dev, "link %s\n",
1494 link_up == MXGEFW_LINK_MYRINET ?
1495 "mismatch (Myrinet detected)" :
1496 "down");
1497 netif_carrier_off(mgp->dev);
1498 mgp->link_changes++;
1499 }
1500 }
1501 if (mgp->rdma_tags_available !=
1502 ntohl(stats->rdma_tags_available)) {
1503 mgp->rdma_tags_available =
1504 ntohl(stats->rdma_tags_available);
1505 netdev_warn(mgp->dev, "RDMA timed out! %d tags left\n",
1506 mgp->rdma_tags_available);
1507 }
1508 mgp->down_cnt += stats->link_down;
1509 if (stats->link_down)
1510 wake_up(&mgp->down_wq);
1511 }
1512 }
1513
1514 static int myri10ge_poll(struct napi_struct *napi, int budget)
1515 {
1516 struct myri10ge_slice_state *ss =
1517 container_of(napi, struct myri10ge_slice_state, napi);
1518 int work_done;
1519
1520 #ifdef CONFIG_MYRI10GE_DCA
1521 if (ss->mgp->dca_enabled)
1522 myri10ge_update_dca(ss);
1523 #endif
1524
1525 /* process as many rx events as NAPI will allow */
1526 work_done = myri10ge_clean_rx_done(ss, budget);
1527
1528 if (work_done < budget) {
1529 napi_complete(napi);
1530 put_be32(htonl(3), ss->irq_claim);
1531 }
1532 return work_done;
1533 }
1534
1535 static irqreturn_t myri10ge_intr(int irq, void *arg)
1536 {
1537 struct myri10ge_slice_state *ss = arg;
1538 struct myri10ge_priv *mgp = ss->mgp;
1539 struct mcp_irq_data *stats = ss->fw_stats;
1540 struct myri10ge_tx_buf *tx = &ss->tx;
1541 u32 send_done_count;
1542 int i;
1543
1544 /* an interrupt on a non-zero receive-only slice is implicitly
1545 * valid since MSI-X irqs are not shared */
1546 if ((mgp->dev->real_num_tx_queues == 1) && (ss != mgp->ss)) {
1547 napi_schedule(&ss->napi);
1548 return (IRQ_HANDLED);
1549 }
1550
1551 /* make sure it is our IRQ, and that the DMA has finished */
1552 if (unlikely(!stats->valid))
1553 return (IRQ_NONE);
1554
1555 /* low bit indicates receives are present, so schedule
1556 * napi poll handler */
1557 if (stats->valid & 1)
1558 napi_schedule(&ss->napi);
1559
1560 if (!mgp->msi_enabled && !mgp->msix_enabled) {
1561 put_be32(0, mgp->irq_deassert);
1562 if (!myri10ge_deassert_wait)
1563 stats->valid = 0;
1564 mb();
1565 } else
1566 stats->valid = 0;
1567
1568 /* Wait for IRQ line to go low, if using INTx */
1569 i = 0;
1570 while (1) {
1571 i++;
1572 /* check for transmit completes and receives */
1573 send_done_count = ntohl(stats->send_done_count);
1574 if (send_done_count != tx->pkt_done)
1575 myri10ge_tx_done(ss, (int)send_done_count);
1576 if (unlikely(i > myri10ge_max_irq_loops)) {
1577 netdev_err(mgp->dev, "irq stuck?\n");
1578 stats->valid = 0;
1579 schedule_work(&mgp->watchdog_work);
1580 }
1581 if (likely(stats->valid == 0))
1582 break;
1583 cpu_relax();
1584 barrier();
1585 }
1586
1587 /* Only slice 0 updates stats */
1588 if (ss == mgp->ss)
1589 myri10ge_check_statblock(mgp);
1590
1591 put_be32(htonl(3), ss->irq_claim + 1);
1592 return (IRQ_HANDLED);
1593 }
1594
1595 static int
1596 myri10ge_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
1597 {
1598 struct myri10ge_priv *mgp = netdev_priv(netdev);
1599 char *ptr;
1600 int i;
1601
1602 cmd->autoneg = AUTONEG_DISABLE;
1603 cmd->speed = SPEED_10000;
1604 cmd->duplex = DUPLEX_FULL;
1605
1606 /*
1607 * parse the product code to deterimine the interface type
1608 * (CX4, XFP, Quad Ribbon Fiber) by looking at the character
1609 * after the 3rd dash in the driver's cached copy of the
1610 * EEPROM's product code string.
1611 */
1612 ptr = mgp->product_code_string;
1613 if (ptr == NULL) {
1614 netdev_err(netdev, "Missing product code\n");
1615 return 0;
1616 }
1617 for (i = 0; i < 3; i++, ptr++) {
1618 ptr = strchr(ptr, '-');
1619 if (ptr == NULL) {
1620 netdev_err(netdev, "Invalid product code %s\n",
1621 mgp->product_code_string);
1622 return 0;
1623 }
1624 }
1625 if (*ptr == '2')
1626 ptr++;
1627 if (*ptr == 'R' || *ptr == 'Q' || *ptr == 'S') {
1628 /* We've found either an XFP, quad ribbon fiber, or SFP+ */
1629 cmd->port = PORT_FIBRE;
1630 cmd->supported |= SUPPORTED_FIBRE;
1631 cmd->advertising |= ADVERTISED_FIBRE;
1632 } else {
1633 cmd->port = PORT_OTHER;
1634 }
1635 if (*ptr == 'R' || *ptr == 'S')
1636 cmd->transceiver = XCVR_EXTERNAL;
1637 else
1638 cmd->transceiver = XCVR_INTERNAL;
1639
1640 return 0;
1641 }
1642
1643 static void
1644 myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
1645 {
1646 struct myri10ge_priv *mgp = netdev_priv(netdev);
1647
1648 strlcpy(info->driver, "myri10ge", sizeof(info->driver));
1649 strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version));
1650 strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version));
1651 strlcpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info));
1652 }
1653
1654 static int
1655 myri10ge_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1656 {
1657 struct myri10ge_priv *mgp = netdev_priv(netdev);
1658
1659 coal->rx_coalesce_usecs = mgp->intr_coal_delay;
1660 return 0;
1661 }
1662
1663 static int
1664 myri10ge_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1665 {
1666 struct myri10ge_priv *mgp = netdev_priv(netdev);
1667
1668 mgp->intr_coal_delay = coal->rx_coalesce_usecs;
1669 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1670 return 0;
1671 }
1672
1673 static void
1674 myri10ge_get_pauseparam(struct net_device *netdev,
1675 struct ethtool_pauseparam *pause)
1676 {
1677 struct myri10ge_priv *mgp = netdev_priv(netdev);
1678
1679 pause->autoneg = 0;
1680 pause->rx_pause = mgp->pause;
1681 pause->tx_pause = mgp->pause;
1682 }
1683
1684 static int
1685 myri10ge_set_pauseparam(struct net_device *netdev,
1686 struct ethtool_pauseparam *pause)
1687 {
1688 struct myri10ge_priv *mgp = netdev_priv(netdev);
1689
1690 if (pause->tx_pause != mgp->pause)
1691 return myri10ge_change_pause(mgp, pause->tx_pause);
1692 if (pause->rx_pause != mgp->pause)
1693 return myri10ge_change_pause(mgp, pause->tx_pause);
1694 if (pause->autoneg != 0)
1695 return -EINVAL;
1696 return 0;
1697 }
1698
1699 static void
1700 myri10ge_get_ringparam(struct net_device *netdev,
1701 struct ethtool_ringparam *ring)
1702 {
1703 struct myri10ge_priv *mgp = netdev_priv(netdev);
1704
1705 ring->rx_mini_max_pending = mgp->ss[0].rx_small.mask + 1;
1706 ring->rx_max_pending = mgp->ss[0].rx_big.mask + 1;
1707 ring->rx_jumbo_max_pending = 0;
1708 ring->tx_max_pending = mgp->ss[0].tx.mask + 1;
1709 ring->rx_mini_pending = ring->rx_mini_max_pending;
1710 ring->rx_pending = ring->rx_max_pending;
1711 ring->rx_jumbo_pending = ring->rx_jumbo_max_pending;
1712 ring->tx_pending = ring->tx_max_pending;
1713 }
1714
1715 static u32 myri10ge_get_rx_csum(struct net_device *netdev)
1716 {
1717 struct myri10ge_priv *mgp = netdev_priv(netdev);
1718
1719 if (mgp->csum_flag)
1720 return 1;
1721 else
1722 return 0;
1723 }
1724
1725 static int myri10ge_set_rx_csum(struct net_device *netdev, u32 csum_enabled)
1726 {
1727 struct myri10ge_priv *mgp = netdev_priv(netdev);
1728 int err = 0;
1729
1730 if (csum_enabled)
1731 mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
1732 else {
1733 u32 flags = ethtool_op_get_flags(netdev);
1734 err = ethtool_op_set_flags(netdev, (flags & ~ETH_FLAG_LRO));
1735 mgp->csum_flag = 0;
1736
1737 }
1738 return err;
1739 }
1740
1741 static int myri10ge_set_tso(struct net_device *netdev, u32 tso_enabled)
1742 {
1743 struct myri10ge_priv *mgp = netdev_priv(netdev);
1744 unsigned long flags = mgp->features & (NETIF_F_TSO6 | NETIF_F_TSO);
1745
1746 if (tso_enabled)
1747 netdev->features |= flags;
1748 else
1749 netdev->features &= ~flags;
1750 return 0;
1751 }
1752
1753 static const char myri10ge_gstrings_main_stats[][ETH_GSTRING_LEN] = {
1754 "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
1755 "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
1756 "rx_length_errors", "rx_over_errors", "rx_crc_errors",
1757 "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
1758 "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
1759 "tx_heartbeat_errors", "tx_window_errors",
1760 /* device-specific stats */
1761 "tx_boundary", "WC", "irq", "MSI", "MSIX",
1762 "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
1763 "serial_number", "watchdog_resets",
1764 #ifdef CONFIG_MYRI10GE_DCA
1765 "dca_capable_firmware", "dca_device_present",
1766 #endif
1767 "link_changes", "link_up", "dropped_link_overflow",
1768 "dropped_link_error_or_filtered",
1769 "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32",
1770 "dropped_unicast_filtered", "dropped_multicast_filtered",
1771 "dropped_runt", "dropped_overrun", "dropped_no_small_buffer",
1772 "dropped_no_big_buffer"
1773 };
1774
1775 static const char myri10ge_gstrings_slice_stats[][ETH_GSTRING_LEN] = {
1776 "----------- slice ---------",
1777 "tx_pkt_start", "tx_pkt_done", "tx_req", "tx_done",
1778 "rx_small_cnt", "rx_big_cnt",
1779 "wake_queue", "stop_queue", "tx_linearized", "LRO aggregated",
1780 "LRO flushed",
1781 "LRO avg aggr", "LRO no_desc"
1782 };
1783
1784 #define MYRI10GE_NET_STATS_LEN 21
1785 #define MYRI10GE_MAIN_STATS_LEN ARRAY_SIZE(myri10ge_gstrings_main_stats)
1786 #define MYRI10GE_SLICE_STATS_LEN ARRAY_SIZE(myri10ge_gstrings_slice_stats)
1787
1788 static void
1789 myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
1790 {
1791 struct myri10ge_priv *mgp = netdev_priv(netdev);
1792 int i;
1793
1794 switch (stringset) {
1795 case ETH_SS_STATS:
1796 memcpy(data, *myri10ge_gstrings_main_stats,
1797 sizeof(myri10ge_gstrings_main_stats));
1798 data += sizeof(myri10ge_gstrings_main_stats);
1799 for (i = 0; i < mgp->num_slices; i++) {
1800 memcpy(data, *myri10ge_gstrings_slice_stats,
1801 sizeof(myri10ge_gstrings_slice_stats));
1802 data += sizeof(myri10ge_gstrings_slice_stats);
1803 }
1804 break;
1805 }
1806 }
1807
1808 static int myri10ge_get_sset_count(struct net_device *netdev, int sset)
1809 {
1810 struct myri10ge_priv *mgp = netdev_priv(netdev);
1811
1812 switch (sset) {
1813 case ETH_SS_STATS:
1814 return MYRI10GE_MAIN_STATS_LEN +
1815 mgp->num_slices * MYRI10GE_SLICE_STATS_LEN;
1816 default:
1817 return -EOPNOTSUPP;
1818 }
1819 }
1820
1821 static void
1822 myri10ge_get_ethtool_stats(struct net_device *netdev,
1823 struct ethtool_stats *stats, u64 * data)
1824 {
1825 struct myri10ge_priv *mgp = netdev_priv(netdev);
1826 struct myri10ge_slice_state *ss;
1827 int slice;
1828 int i;
1829
1830 /* force stats update */
1831 (void)myri10ge_get_stats(netdev);
1832 for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++)
1833 data[i] = ((unsigned long *)&netdev->stats)[i];
1834
1835 data[i++] = (unsigned int)mgp->tx_boundary;
1836 data[i++] = (unsigned int)mgp->wc_enabled;
1837 data[i++] = (unsigned int)mgp->pdev->irq;
1838 data[i++] = (unsigned int)mgp->msi_enabled;
1839 data[i++] = (unsigned int)mgp->msix_enabled;
1840 data[i++] = (unsigned int)mgp->read_dma;
1841 data[i++] = (unsigned int)mgp->write_dma;
1842 data[i++] = (unsigned int)mgp->read_write_dma;
1843 data[i++] = (unsigned int)mgp->serial_number;
1844 data[i++] = (unsigned int)mgp->watchdog_resets;
1845 #ifdef CONFIG_MYRI10GE_DCA
1846 data[i++] = (unsigned int)(mgp->ss[0].dca_tag != NULL);
1847 data[i++] = (unsigned int)(mgp->dca_enabled);
1848 #endif
1849 data[i++] = (unsigned int)mgp->link_changes;
1850
1851 /* firmware stats are useful only in the first slice */
1852 ss = &mgp->ss[0];
1853 data[i++] = (unsigned int)ntohl(ss->fw_stats->link_up);
1854 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_link_overflow);
1855 data[i++] =
1856 (unsigned int)ntohl(ss->fw_stats->dropped_link_error_or_filtered);
1857 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_pause);
1858 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_phy);
1859 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_crc32);
1860 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_unicast_filtered);
1861 data[i++] =
1862 (unsigned int)ntohl(ss->fw_stats->dropped_multicast_filtered);
1863 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_runt);
1864 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_overrun);
1865 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_small_buffer);
1866 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_big_buffer);
1867
1868 for (slice = 0; slice < mgp->num_slices; slice++) {
1869 ss = &mgp->ss[slice];
1870 data[i++] = slice;
1871 data[i++] = (unsigned int)ss->tx.pkt_start;
1872 data[i++] = (unsigned int)ss->tx.pkt_done;
1873 data[i++] = (unsigned int)ss->tx.req;
1874 data[i++] = (unsigned int)ss->tx.done;
1875 data[i++] = (unsigned int)ss->rx_small.cnt;
1876 data[i++] = (unsigned int)ss->rx_big.cnt;
1877 data[i++] = (unsigned int)ss->tx.wake_queue;
1878 data[i++] = (unsigned int)ss->tx.stop_queue;
1879 data[i++] = (unsigned int)ss->tx.linearized;
1880 data[i++] = ss->rx_done.lro_mgr.stats.aggregated;
1881 data[i++] = ss->rx_done.lro_mgr.stats.flushed;
1882 if (ss->rx_done.lro_mgr.stats.flushed)
1883 data[i++] = ss->rx_done.lro_mgr.stats.aggregated /
1884 ss->rx_done.lro_mgr.stats.flushed;
1885 else
1886 data[i++] = 0;
1887 data[i++] = ss->rx_done.lro_mgr.stats.no_desc;
1888 }
1889 }
1890
1891 static void myri10ge_set_msglevel(struct net_device *netdev, u32 value)
1892 {
1893 struct myri10ge_priv *mgp = netdev_priv(netdev);
1894 mgp->msg_enable = value;
1895 }
1896
1897 static u32 myri10ge_get_msglevel(struct net_device *netdev)
1898 {
1899 struct myri10ge_priv *mgp = netdev_priv(netdev);
1900 return mgp->msg_enable;
1901 }
1902
1903 static const struct ethtool_ops myri10ge_ethtool_ops = {
1904 .get_settings = myri10ge_get_settings,
1905 .get_drvinfo = myri10ge_get_drvinfo,
1906 .get_coalesce = myri10ge_get_coalesce,
1907 .set_coalesce = myri10ge_set_coalesce,
1908 .get_pauseparam = myri10ge_get_pauseparam,
1909 .set_pauseparam = myri10ge_set_pauseparam,
1910 .get_ringparam = myri10ge_get_ringparam,
1911 .get_rx_csum = myri10ge_get_rx_csum,
1912 .set_rx_csum = myri10ge_set_rx_csum,
1913 .set_tx_csum = ethtool_op_set_tx_hw_csum,
1914 .set_sg = ethtool_op_set_sg,
1915 .set_tso = myri10ge_set_tso,
1916 .get_link = ethtool_op_get_link,
1917 .get_strings = myri10ge_get_strings,
1918 .get_sset_count = myri10ge_get_sset_count,
1919 .get_ethtool_stats = myri10ge_get_ethtool_stats,
1920 .set_msglevel = myri10ge_set_msglevel,
1921 .get_msglevel = myri10ge_get_msglevel,
1922 .get_flags = ethtool_op_get_flags,
1923 .set_flags = ethtool_op_set_flags
1924 };
1925
1926 static int myri10ge_allocate_rings(struct myri10ge_slice_state *ss)
1927 {
1928 struct myri10ge_priv *mgp = ss->mgp;
1929 struct myri10ge_cmd cmd;
1930 struct net_device *dev = mgp->dev;
1931 int tx_ring_size, rx_ring_size;
1932 int tx_ring_entries, rx_ring_entries;
1933 int i, slice, status;
1934 size_t bytes;
1935
1936 /* get ring sizes */
1937 slice = ss - mgp->ss;
1938 cmd.data0 = slice;
1939 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0);
1940 tx_ring_size = cmd.data0;
1941 cmd.data0 = slice;
1942 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
1943 if (status != 0)
1944 return status;
1945 rx_ring_size = cmd.data0;
1946
1947 tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send);
1948 rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr);
1949 ss->tx.mask = tx_ring_entries - 1;
1950 ss->rx_small.mask = ss->rx_big.mask = rx_ring_entries - 1;
1951
1952 status = -ENOMEM;
1953
1954 /* allocate the host shadow rings */
1955
1956 bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4)
1957 * sizeof(*ss->tx.req_list);
1958 ss->tx.req_bytes = kzalloc(bytes, GFP_KERNEL);
1959 if (ss->tx.req_bytes == NULL)
1960 goto abort_with_nothing;
1961
1962 /* ensure req_list entries are aligned to 8 bytes */
1963 ss->tx.req_list = (struct mcp_kreq_ether_send *)
1964 ALIGN((unsigned long)ss->tx.req_bytes, 8);
1965 ss->tx.queue_active = 0;
1966
1967 bytes = rx_ring_entries * sizeof(*ss->rx_small.shadow);
1968 ss->rx_small.shadow = kzalloc(bytes, GFP_KERNEL);
1969 if (ss->rx_small.shadow == NULL)
1970 goto abort_with_tx_req_bytes;
1971
1972 bytes = rx_ring_entries * sizeof(*ss->rx_big.shadow);
1973 ss->rx_big.shadow = kzalloc(bytes, GFP_KERNEL);
1974 if (ss->rx_big.shadow == NULL)
1975 goto abort_with_rx_small_shadow;
1976
1977 /* allocate the host info rings */
1978
1979 bytes = tx_ring_entries * sizeof(*ss->tx.info);
1980 ss->tx.info = kzalloc(bytes, GFP_KERNEL);
1981 if (ss->tx.info == NULL)
1982 goto abort_with_rx_big_shadow;
1983
1984 bytes = rx_ring_entries * sizeof(*ss->rx_small.info);
1985 ss->rx_small.info = kzalloc(bytes, GFP_KERNEL);
1986 if (ss->rx_small.info == NULL)
1987 goto abort_with_tx_info;
1988
1989 bytes = rx_ring_entries * sizeof(*ss->rx_big.info);
1990 ss->rx_big.info = kzalloc(bytes, GFP_KERNEL);
1991 if (ss->rx_big.info == NULL)
1992 goto abort_with_rx_small_info;
1993
1994 /* Fill the receive rings */
1995 ss->rx_big.cnt = 0;
1996 ss->rx_small.cnt = 0;
1997 ss->rx_big.fill_cnt = 0;
1998 ss->rx_small.fill_cnt = 0;
1999 ss->rx_small.page_offset = MYRI10GE_ALLOC_SIZE;
2000 ss->rx_big.page_offset = MYRI10GE_ALLOC_SIZE;
2001 ss->rx_small.watchdog_needed = 0;
2002 ss->rx_big.watchdog_needed = 0;
2003 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
2004 mgp->small_bytes + MXGEFW_PAD, 0);
2005
2006 if (ss->rx_small.fill_cnt < ss->rx_small.mask + 1) {
2007 netdev_err(dev, "slice-%d: alloced only %d small bufs\n",
2008 slice, ss->rx_small.fill_cnt);
2009 goto abort_with_rx_small_ring;
2010 }
2011
2012 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
2013 if (ss->rx_big.fill_cnt < ss->rx_big.mask + 1) {
2014 netdev_err(dev, "slice-%d: alloced only %d big bufs\n",
2015 slice, ss->rx_big.fill_cnt);
2016 goto abort_with_rx_big_ring;
2017 }
2018
2019 return 0;
2020
2021 abort_with_rx_big_ring:
2022 for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2023 int idx = i & ss->rx_big.mask;
2024 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2025 mgp->big_bytes);
2026 put_page(ss->rx_big.info[idx].page);
2027 }
2028
2029 abort_with_rx_small_ring:
2030 for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2031 int idx = i & ss->rx_small.mask;
2032 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2033 mgp->small_bytes + MXGEFW_PAD);
2034 put_page(ss->rx_small.info[idx].page);
2035 }
2036
2037 kfree(ss->rx_big.info);
2038
2039 abort_with_rx_small_info:
2040 kfree(ss->rx_small.info);
2041
2042 abort_with_tx_info:
2043 kfree(ss->tx.info);
2044
2045 abort_with_rx_big_shadow:
2046 kfree(ss->rx_big.shadow);
2047
2048 abort_with_rx_small_shadow:
2049 kfree(ss->rx_small.shadow);
2050
2051 abort_with_tx_req_bytes:
2052 kfree(ss->tx.req_bytes);
2053 ss->tx.req_bytes = NULL;
2054 ss->tx.req_list = NULL;
2055
2056 abort_with_nothing:
2057 return status;
2058 }
2059
2060 static void myri10ge_free_rings(struct myri10ge_slice_state *ss)
2061 {
2062 struct myri10ge_priv *mgp = ss->mgp;
2063 struct sk_buff *skb;
2064 struct myri10ge_tx_buf *tx;
2065 int i, len, idx;
2066
2067 /* If not allocated, skip it */
2068 if (ss->tx.req_list == NULL)
2069 return;
2070
2071 for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2072 idx = i & ss->rx_big.mask;
2073 if (i == ss->rx_big.fill_cnt - 1)
2074 ss->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE;
2075 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2076 mgp->big_bytes);
2077 put_page(ss->rx_big.info[idx].page);
2078 }
2079
2080 for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2081 idx = i & ss->rx_small.mask;
2082 if (i == ss->rx_small.fill_cnt - 1)
2083 ss->rx_small.info[idx].page_offset =
2084 MYRI10GE_ALLOC_SIZE;
2085 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2086 mgp->small_bytes + MXGEFW_PAD);
2087 put_page(ss->rx_small.info[idx].page);
2088 }
2089 tx = &ss->tx;
2090 while (tx->done != tx->req) {
2091 idx = tx->done & tx->mask;
2092 skb = tx->info[idx].skb;
2093
2094 /* Mark as free */
2095 tx->info[idx].skb = NULL;
2096 tx->done++;
2097 len = pci_unmap_len(&tx->info[idx], len);
2098 pci_unmap_len_set(&tx->info[idx], len, 0);
2099 if (skb) {
2100 ss->stats.tx_dropped++;
2101 dev_kfree_skb_any(skb);
2102 if (len)
2103 pci_unmap_single(mgp->pdev,
2104 pci_unmap_addr(&tx->info[idx],
2105 bus), len,
2106 PCI_DMA_TODEVICE);
2107 } else {
2108 if (len)
2109 pci_unmap_page(mgp->pdev,
2110 pci_unmap_addr(&tx->info[idx],
2111 bus), len,
2112 PCI_DMA_TODEVICE);
2113 }
2114 }
2115 kfree(ss->rx_big.info);
2116
2117 kfree(ss->rx_small.info);
2118
2119 kfree(ss->tx.info);
2120
2121 kfree(ss->rx_big.shadow);
2122
2123 kfree(ss->rx_small.shadow);
2124
2125 kfree(ss->tx.req_bytes);
2126 ss->tx.req_bytes = NULL;
2127 ss->tx.req_list = NULL;
2128 }
2129
2130 static int myri10ge_request_irq(struct myri10ge_priv *mgp)
2131 {
2132 struct pci_dev *pdev = mgp->pdev;
2133 struct myri10ge_slice_state *ss;
2134 struct net_device *netdev = mgp->dev;
2135 int i;
2136 int status;
2137
2138 mgp->msi_enabled = 0;
2139 mgp->msix_enabled = 0;
2140 status = 0;
2141 if (myri10ge_msi) {
2142 if (mgp->num_slices > 1) {
2143 status =
2144 pci_enable_msix(pdev, mgp->msix_vectors,
2145 mgp->num_slices);
2146 if (status == 0) {
2147 mgp->msix_enabled = 1;
2148 } else {
2149 dev_err(&pdev->dev,
2150 "Error %d setting up MSI-X\n", status);
2151 return status;
2152 }
2153 }
2154 if (mgp->msix_enabled == 0) {
2155 status = pci_enable_msi(pdev);
2156 if (status != 0) {
2157 dev_err(&pdev->dev,
2158 "Error %d setting up MSI; falling back to xPIC\n",
2159 status);
2160 } else {
2161 mgp->msi_enabled = 1;
2162 }
2163 }
2164 }
2165 if (mgp->msix_enabled) {
2166 for (i = 0; i < mgp->num_slices; i++) {
2167 ss = &mgp->ss[i];
2168 snprintf(ss->irq_desc, sizeof(ss->irq_desc),
2169 "%s:slice-%d", netdev->name, i);
2170 status = request_irq(mgp->msix_vectors[i].vector,
2171 myri10ge_intr, 0, ss->irq_desc,
2172 ss);
2173 if (status != 0) {
2174 dev_err(&pdev->dev,
2175 "slice %d failed to allocate IRQ\n", i);
2176 i--;
2177 while (i >= 0) {
2178 free_irq(mgp->msix_vectors[i].vector,
2179 &mgp->ss[i]);
2180 i--;
2181 }
2182 pci_disable_msix(pdev);
2183 return status;
2184 }
2185 }
2186 } else {
2187 status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED,
2188 mgp->dev->name, &mgp->ss[0]);
2189 if (status != 0) {
2190 dev_err(&pdev->dev, "failed to allocate IRQ\n");
2191 if (mgp->msi_enabled)
2192 pci_disable_msi(pdev);
2193 }
2194 }
2195 return status;
2196 }
2197
2198 static void myri10ge_free_irq(struct myri10ge_priv *mgp)
2199 {
2200 struct pci_dev *pdev = mgp->pdev;
2201 int i;
2202
2203 if (mgp->msix_enabled) {
2204 for (i = 0; i < mgp->num_slices; i++)
2205 free_irq(mgp->msix_vectors[i].vector, &mgp->ss[i]);
2206 } else {
2207 free_irq(pdev->irq, &mgp->ss[0]);
2208 }
2209 if (mgp->msi_enabled)
2210 pci_disable_msi(pdev);
2211 if (mgp->msix_enabled)
2212 pci_disable_msix(pdev);
2213 }
2214
2215 static int
2216 myri10ge_get_frag_header(struct skb_frag_struct *frag, void **mac_hdr,
2217 void **ip_hdr, void **tcpudp_hdr,
2218 u64 * hdr_flags, void *priv)
2219 {
2220 struct ethhdr *eh;
2221 struct vlan_ethhdr *veh;
2222 struct iphdr *iph;
2223 u8 *va = page_address(frag->page) + frag->page_offset;
2224 unsigned long ll_hlen;
2225 /* passed opaque through lro_receive_frags() */
2226 __wsum csum = (__force __wsum) (unsigned long)priv;
2227
2228 /* find the mac header, aborting if not IPv4 */
2229
2230 eh = (struct ethhdr *)va;
2231 *mac_hdr = eh;
2232 ll_hlen = ETH_HLEN;
2233 if (eh->h_proto != htons(ETH_P_IP)) {
2234 if (eh->h_proto == htons(ETH_P_8021Q)) {
2235 veh = (struct vlan_ethhdr *)va;
2236 if (veh->h_vlan_encapsulated_proto != htons(ETH_P_IP))
2237 return -1;
2238
2239 ll_hlen += VLAN_HLEN;
2240
2241 /*
2242 * HW checksum starts ETH_HLEN bytes into
2243 * frame, so we must subtract off the VLAN
2244 * header's checksum before csum can be used
2245 */
2246 csum = csum_sub(csum, csum_partial(va + ETH_HLEN,
2247 VLAN_HLEN, 0));
2248 } else {
2249 return -1;
2250 }
2251 }
2252 *hdr_flags = LRO_IPV4;
2253
2254 iph = (struct iphdr *)(va + ll_hlen);
2255 *ip_hdr = iph;
2256 if (iph->protocol != IPPROTO_TCP)
2257 return -1;
2258 if (iph->frag_off & htons(IP_MF | IP_OFFSET))
2259 return -1;
2260 *hdr_flags |= LRO_TCP;
2261 *tcpudp_hdr = (u8 *) (*ip_hdr) + (iph->ihl << 2);
2262
2263 /* verify the IP checksum */
2264 if (unlikely(ip_fast_csum((u8 *) iph, iph->ihl)))
2265 return -1;
2266
2267 /* verify the checksum */
2268 if (unlikely(csum_tcpudp_magic(iph->saddr, iph->daddr,
2269 ntohs(iph->tot_len) - (iph->ihl << 2),
2270 IPPROTO_TCP, csum)))
2271 return -1;
2272
2273 return 0;
2274 }
2275
2276 static int myri10ge_get_txrx(struct myri10ge_priv *mgp, int slice)
2277 {
2278 struct myri10ge_cmd cmd;
2279 struct myri10ge_slice_state *ss;
2280 int status;
2281
2282 ss = &mgp->ss[slice];
2283 status = 0;
2284 if (slice == 0 || (mgp->dev->real_num_tx_queues > 1)) {
2285 cmd.data0 = slice;
2286 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET,
2287 &cmd, 0);
2288 ss->tx.lanai = (struct mcp_kreq_ether_send __iomem *)
2289 (mgp->sram + cmd.data0);
2290 }
2291 cmd.data0 = slice;
2292 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET,
2293 &cmd, 0);
2294 ss->rx_small.lanai = (struct mcp_kreq_ether_recv __iomem *)
2295 (mgp->sram + cmd.data0);
2296
2297 cmd.data0 = slice;
2298 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0);
2299 ss->rx_big.lanai = (struct mcp_kreq_ether_recv __iomem *)
2300 (mgp->sram + cmd.data0);
2301
2302 ss->tx.send_go = (__iomem __be32 *)
2303 (mgp->sram + MXGEFW_ETH_SEND_GO + 64 * slice);
2304 ss->tx.send_stop = (__iomem __be32 *)
2305 (mgp->sram + MXGEFW_ETH_SEND_STOP + 64 * slice);
2306 return status;
2307
2308 }
2309
2310 static int myri10ge_set_stats(struct myri10ge_priv *mgp, int slice)
2311 {
2312 struct myri10ge_cmd cmd;
2313 struct myri10ge_slice_state *ss;
2314 int status;
2315
2316 ss = &mgp->ss[slice];
2317 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->fw_stats_bus);
2318 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->fw_stats_bus);
2319 cmd.data2 = sizeof(struct mcp_irq_data) | (slice << 16);
2320 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0);
2321 if (status == -ENOSYS) {
2322 dma_addr_t bus = ss->fw_stats_bus;
2323 if (slice != 0)
2324 return -EINVAL;
2325 bus += offsetof(struct mcp_irq_data, send_done_count);
2326 cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus);
2327 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus);
2328 status = myri10ge_send_cmd(mgp,
2329 MXGEFW_CMD_SET_STATS_DMA_OBSOLETE,
2330 &cmd, 0);
2331 /* Firmware cannot support multicast without STATS_DMA_V2 */
2332 mgp->fw_multicast_support = 0;
2333 } else {
2334 mgp->fw_multicast_support = 1;
2335 }
2336 return 0;
2337 }
2338
2339 static int myri10ge_open(struct net_device *dev)
2340 {
2341 struct myri10ge_slice_state *ss;
2342 struct myri10ge_priv *mgp = netdev_priv(dev);
2343 struct myri10ge_cmd cmd;
2344 int i, status, big_pow2, slice;
2345 u8 *itable;
2346 struct net_lro_mgr *lro_mgr;
2347
2348 if (mgp->running != MYRI10GE_ETH_STOPPED)
2349 return -EBUSY;
2350
2351 mgp->running = MYRI10GE_ETH_STARTING;
2352 status = myri10ge_reset(mgp);
2353 if (status != 0) {
2354 netdev_err(dev, "failed reset\n");
2355 goto abort_with_nothing;
2356 }
2357
2358 if (mgp->num_slices > 1) {
2359 cmd.data0 = mgp->num_slices;
2360 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
2361 if (mgp->dev->real_num_tx_queues > 1)
2362 cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
2363 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
2364 &cmd, 0);
2365 if (status != 0) {
2366 netdev_err(dev, "failed to set number of slices\n");
2367 goto abort_with_nothing;
2368 }
2369 /* setup the indirection table */
2370 cmd.data0 = mgp->num_slices;
2371 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_TABLE_SIZE,
2372 &cmd, 0);
2373
2374 status |= myri10ge_send_cmd(mgp,
2375 MXGEFW_CMD_GET_RSS_TABLE_OFFSET,
2376 &cmd, 0);
2377 if (status != 0) {
2378 netdev_err(dev, "failed to setup rss tables\n");
2379 goto abort_with_nothing;
2380 }
2381
2382 /* just enable an identity mapping */
2383 itable = mgp->sram + cmd.data0;
2384 for (i = 0; i < mgp->num_slices; i++)
2385 __raw_writeb(i, &itable[i]);
2386
2387 cmd.data0 = 1;
2388 cmd.data1 = myri10ge_rss_hash;
2389 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_ENABLE,
2390 &cmd, 0);
2391 if (status != 0) {
2392 netdev_err(dev, "failed to enable slices\n");
2393 goto abort_with_nothing;
2394 }
2395 }
2396
2397 status = myri10ge_request_irq(mgp);
2398 if (status != 0)
2399 goto abort_with_nothing;
2400
2401 /* decide what small buffer size to use. For good TCP rx
2402 * performance, it is important to not receive 1514 byte
2403 * frames into jumbo buffers, as it confuses the socket buffer
2404 * accounting code, leading to drops and erratic performance.
2405 */
2406
2407 if (dev->mtu <= ETH_DATA_LEN)
2408 /* enough for a TCP header */
2409 mgp->small_bytes = (128 > SMP_CACHE_BYTES)
2410 ? (128 - MXGEFW_PAD)
2411 : (SMP_CACHE_BYTES - MXGEFW_PAD);
2412 else
2413 /* enough for a vlan encapsulated ETH_DATA_LEN frame */
2414 mgp->small_bytes = VLAN_ETH_FRAME_LEN;
2415
2416 /* Override the small buffer size? */
2417 if (myri10ge_small_bytes > 0)
2418 mgp->small_bytes = myri10ge_small_bytes;
2419
2420 /* Firmware needs the big buff size as a power of 2. Lie and
2421 * tell him the buffer is larger, because we only use 1
2422 * buffer/pkt, and the mtu will prevent overruns.
2423 */
2424 big_pow2 = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2425 if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) {
2426 while (!is_power_of_2(big_pow2))
2427 big_pow2++;
2428 mgp->big_bytes = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2429 } else {
2430 big_pow2 = MYRI10GE_ALLOC_SIZE;
2431 mgp->big_bytes = big_pow2;
2432 }
2433
2434 /* setup the per-slice data structures */
2435 for (slice = 0; slice < mgp->num_slices; slice++) {
2436 ss = &mgp->ss[slice];
2437
2438 status = myri10ge_get_txrx(mgp, slice);
2439 if (status != 0) {
2440 netdev_err(dev, "failed to get ring sizes or locations\n");
2441 goto abort_with_rings;
2442 }
2443 status = myri10ge_allocate_rings(ss);
2444 if (status != 0)
2445 goto abort_with_rings;
2446
2447 /* only firmware which supports multiple TX queues
2448 * supports setting up the tx stats on non-zero
2449 * slices */
2450 if (slice == 0 || mgp->dev->real_num_tx_queues > 1)
2451 status = myri10ge_set_stats(mgp, slice);
2452 if (status) {
2453 netdev_err(dev, "Couldn't set stats DMA\n");
2454 goto abort_with_rings;
2455 }
2456
2457 lro_mgr = &ss->rx_done.lro_mgr;
2458 lro_mgr->dev = dev;
2459 lro_mgr->features = LRO_F_NAPI;
2460 lro_mgr->ip_summed = CHECKSUM_COMPLETE;
2461 lro_mgr->ip_summed_aggr = CHECKSUM_UNNECESSARY;
2462 lro_mgr->max_desc = MYRI10GE_MAX_LRO_DESCRIPTORS;
2463 lro_mgr->lro_arr = ss->rx_done.lro_desc;
2464 lro_mgr->get_frag_header = myri10ge_get_frag_header;
2465 lro_mgr->max_aggr = myri10ge_lro_max_pkts;
2466 lro_mgr->frag_align_pad = 2;
2467 if (lro_mgr->max_aggr > MAX_SKB_FRAGS)
2468 lro_mgr->max_aggr = MAX_SKB_FRAGS;
2469
2470 /* must happen prior to any irq */
2471 napi_enable(&(ss)->napi);
2472 }
2473
2474 /* now give firmware buffers sizes, and MTU */
2475 cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
2476 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0);
2477 cmd.data0 = mgp->small_bytes;
2478 status |=
2479 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0);
2480 cmd.data0 = big_pow2;
2481 status |=
2482 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0);
2483 if (status) {
2484 netdev_err(dev, "Couldn't set buffer sizes\n");
2485 goto abort_with_rings;
2486 }
2487
2488 /*
2489 * Set Linux style TSO mode; this is needed only on newer
2490 * firmware versions. Older versions default to Linux
2491 * style TSO
2492 */
2493 cmd.data0 = 0;
2494 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_TSO_MODE, &cmd, 0);
2495 if (status && status != -ENOSYS) {
2496 netdev_err(dev, "Couldn't set TSO mode\n");
2497 goto abort_with_rings;
2498 }
2499
2500 mgp->link_state = ~0U;
2501 mgp->rdma_tags_available = 15;
2502
2503 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0);
2504 if (status) {
2505 netdev_err(dev, "Couldn't bring up link\n");
2506 goto abort_with_rings;
2507 }
2508
2509 mgp->running = MYRI10GE_ETH_RUNNING;
2510 mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ;
2511 add_timer(&mgp->watchdog_timer);
2512 netif_tx_wake_all_queues(dev);
2513
2514 return 0;
2515
2516 abort_with_rings:
2517 while (slice) {
2518 slice--;
2519 napi_disable(&mgp->ss[slice].napi);
2520 }
2521 for (i = 0; i < mgp->num_slices; i++)
2522 myri10ge_free_rings(&mgp->ss[i]);
2523
2524 myri10ge_free_irq(mgp);
2525
2526 abort_with_nothing:
2527 mgp->running = MYRI10GE_ETH_STOPPED;
2528 return -ENOMEM;
2529 }
2530
2531 static int myri10ge_close(struct net_device *dev)
2532 {
2533 struct myri10ge_priv *mgp = netdev_priv(dev);
2534 struct myri10ge_cmd cmd;
2535 int status, old_down_cnt;
2536 int i;
2537
2538 if (mgp->running != MYRI10GE_ETH_RUNNING)
2539 return 0;
2540
2541 if (mgp->ss[0].tx.req_bytes == NULL)
2542 return 0;
2543
2544 del_timer_sync(&mgp->watchdog_timer);
2545 mgp->running = MYRI10GE_ETH_STOPPING;
2546 for (i = 0; i < mgp->num_slices; i++) {
2547 napi_disable(&mgp->ss[i].napi);
2548 }
2549 netif_carrier_off(dev);
2550
2551 netif_tx_stop_all_queues(dev);
2552 if (mgp->rebooted == 0) {
2553 old_down_cnt = mgp->down_cnt;
2554 mb();
2555 status =
2556 myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0);
2557 if (status)
2558 netdev_err(dev, "Couldn't bring down link\n");
2559
2560 wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt,
2561 HZ);
2562 if (old_down_cnt == mgp->down_cnt)
2563 netdev_err(dev, "never got down irq\n");
2564 }
2565 netif_tx_disable(dev);
2566 myri10ge_free_irq(mgp);
2567 for (i = 0; i < mgp->num_slices; i++)
2568 myri10ge_free_rings(&mgp->ss[i]);
2569
2570 mgp->running = MYRI10GE_ETH_STOPPED;
2571 return 0;
2572 }
2573
2574 /* copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
2575 * backwards one at a time and handle ring wraps */
2576
2577 static inline void
2578 myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx,
2579 struct mcp_kreq_ether_send *src, int cnt)
2580 {
2581 int idx, starting_slot;
2582 starting_slot = tx->req;
2583 while (cnt > 1) {
2584 cnt--;
2585 idx = (starting_slot + cnt) & tx->mask;
2586 myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src));
2587 mb();
2588 }
2589 }
2590
2591 /*
2592 * copy an array of struct mcp_kreq_ether_send's to the mcp. Copy
2593 * at most 32 bytes at a time, so as to avoid involving the software
2594 * pio handler in the nic. We re-write the first segment's flags
2595 * to mark them valid only after writing the entire chain.
2596 */
2597
2598 static inline void
2599 myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src,
2600 int cnt)
2601 {
2602 int idx, i;
2603 struct mcp_kreq_ether_send __iomem *dstp, *dst;
2604 struct mcp_kreq_ether_send *srcp;
2605 u8 last_flags;
2606
2607 idx = tx->req & tx->mask;
2608
2609 last_flags = src->flags;
2610 src->flags = 0;
2611 mb();
2612 dst = dstp = &tx->lanai[idx];
2613 srcp = src;
2614
2615 if ((idx + cnt) < tx->mask) {
2616 for (i = 0; i < (cnt - 1); i += 2) {
2617 myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src));
2618 mb(); /* force write every 32 bytes */
2619 srcp += 2;
2620 dstp += 2;
2621 }
2622 } else {
2623 /* submit all but the first request, and ensure
2624 * that it is submitted below */
2625 myri10ge_submit_req_backwards(tx, src, cnt);
2626 i = 0;
2627 }
2628 if (i < cnt) {
2629 /* submit the first request */
2630 myri10ge_pio_copy(dstp, srcp, sizeof(*src));
2631 mb(); /* barrier before setting valid flag */
2632 }
2633
2634 /* re-write the last 32-bits with the valid flags */
2635 src->flags = last_flags;
2636 put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3);
2637 tx->req += cnt;
2638 mb();
2639 }
2640
2641 /*
2642 * Transmit a packet. We need to split the packet so that a single
2643 * segment does not cross myri10ge->tx_boundary, so this makes segment
2644 * counting tricky. So rather than try to count segments up front, we
2645 * just give up if there are too few segments to hold a reasonably
2646 * fragmented packet currently available. If we run
2647 * out of segments while preparing a packet for DMA, we just linearize
2648 * it and try again.
2649 */
2650
2651 static netdev_tx_t myri10ge_xmit(struct sk_buff *skb,
2652 struct net_device *dev)
2653 {
2654 struct myri10ge_priv *mgp = netdev_priv(dev);
2655 struct myri10ge_slice_state *ss;
2656 struct mcp_kreq_ether_send *req;
2657 struct myri10ge_tx_buf *tx;
2658 struct skb_frag_struct *frag;
2659 struct netdev_queue *netdev_queue;
2660 dma_addr_t bus;
2661 u32 low;
2662 __be32 high_swapped;
2663 unsigned int len;
2664 int idx, last_idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
2665 u16 pseudo_hdr_offset, cksum_offset, queue;
2666 int cum_len, seglen, boundary, rdma_count;
2667 u8 flags, odd_flag;
2668
2669 queue = skb_get_queue_mapping(skb);
2670 ss = &mgp->ss[queue];
2671 netdev_queue = netdev_get_tx_queue(mgp->dev, queue);
2672 tx = &ss->tx;
2673
2674 again:
2675 req = tx->req_list;
2676 avail = tx->mask - 1 - (tx->req - tx->done);
2677
2678 mss = 0;
2679 max_segments = MXGEFW_MAX_SEND_DESC;
2680
2681 if (skb_is_gso(skb)) {
2682 mss = skb_shinfo(skb)->gso_size;
2683 max_segments = MYRI10GE_MAX_SEND_DESC_TSO;
2684 }
2685
2686 if ((unlikely(avail < max_segments))) {
2687 /* we are out of transmit resources */
2688 tx->stop_queue++;
2689 netif_tx_stop_queue(netdev_queue);
2690 return NETDEV_TX_BUSY;
2691 }
2692
2693 /* Setup checksum offloading, if needed */
2694 cksum_offset = 0;
2695 pseudo_hdr_offset = 0;
2696 odd_flag = 0;
2697 flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
2698 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2699 cksum_offset = skb_transport_offset(skb);
2700 pseudo_hdr_offset = cksum_offset + skb->csum_offset;
2701 /* If the headers are excessively large, then we must
2702 * fall back to a software checksum */
2703 if (unlikely(!mss && (cksum_offset > 255 ||
2704 pseudo_hdr_offset > 127))) {
2705 if (skb_checksum_help(skb))
2706 goto drop;
2707 cksum_offset = 0;
2708 pseudo_hdr_offset = 0;
2709 } else {
2710 odd_flag = MXGEFW_FLAGS_ALIGN_ODD;
2711 flags |= MXGEFW_FLAGS_CKSUM;
2712 }
2713 }
2714
2715 cum_len = 0;
2716
2717 if (mss) { /* TSO */
2718 /* this removes any CKSUM flag from before */
2719 flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST);
2720
2721 /* negative cum_len signifies to the
2722 * send loop that we are still in the
2723 * header portion of the TSO packet.
2724 * TSO header can be at most 1KB long */
2725 cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb));
2726
2727 /* for IPv6 TSO, the checksum offset stores the
2728 * TCP header length, to save the firmware from
2729 * the need to parse the headers */
2730 if (skb_is_gso_v6(skb)) {
2731 cksum_offset = tcp_hdrlen(skb);
2732 /* Can only handle headers <= max_tso6 long */
2733 if (unlikely(-cum_len > mgp->max_tso6))
2734 return myri10ge_sw_tso(skb, dev);
2735 }
2736 /* for TSO, pseudo_hdr_offset holds mss.
2737 * The firmware figures out where to put
2738 * the checksum by parsing the header. */
2739 pseudo_hdr_offset = mss;
2740 } else
2741 /* Mark small packets, and pad out tiny packets */
2742 if (skb->len <= MXGEFW_SEND_SMALL_SIZE) {
2743 flags |= MXGEFW_FLAGS_SMALL;
2744
2745 /* pad frames to at least ETH_ZLEN bytes */
2746 if (unlikely(skb->len < ETH_ZLEN)) {
2747 if (skb_padto(skb, ETH_ZLEN)) {
2748 /* The packet is gone, so we must
2749 * return 0 */
2750 ss->stats.tx_dropped += 1;
2751 return NETDEV_TX_OK;
2752 }
2753 /* adjust the len to account for the zero pad
2754 * so that the nic can know how long it is */
2755 skb->len = ETH_ZLEN;
2756 }
2757 }
2758
2759 /* map the skb for DMA */
2760 len = skb->len - skb->data_len;
2761 idx = tx->req & tx->mask;
2762 tx->info[idx].skb = skb;
2763 bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE);
2764 pci_unmap_addr_set(&tx->info[idx], bus, bus);
2765 pci_unmap_len_set(&tx->info[idx], len, len);
2766
2767 frag_cnt = skb_shinfo(skb)->nr_frags;
2768 frag_idx = 0;
2769 count = 0;
2770 rdma_count = 0;
2771
2772 /* "rdma_count" is the number of RDMAs belonging to the
2773 * current packet BEFORE the current send request. For
2774 * non-TSO packets, this is equal to "count".
2775 * For TSO packets, rdma_count needs to be reset
2776 * to 0 after a segment cut.
2777 *
2778 * The rdma_count field of the send request is
2779 * the number of RDMAs of the packet starting at
2780 * that request. For TSO send requests with one ore more cuts
2781 * in the middle, this is the number of RDMAs starting
2782 * after the last cut in the request. All previous
2783 * segments before the last cut implicitly have 1 RDMA.
2784 *
2785 * Since the number of RDMAs is not known beforehand,
2786 * it must be filled-in retroactively - after each
2787 * segmentation cut or at the end of the entire packet.
2788 */
2789
2790 while (1) {
2791 /* Break the SKB or Fragment up into pieces which
2792 * do not cross mgp->tx_boundary */
2793 low = MYRI10GE_LOWPART_TO_U32(bus);
2794 high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
2795 while (len) {
2796 u8 flags_next;
2797 int cum_len_next;
2798
2799 if (unlikely(count == max_segments))
2800 goto abort_linearize;
2801
2802 boundary =
2803 (low + mgp->tx_boundary) & ~(mgp->tx_boundary - 1);
2804 seglen = boundary - low;
2805 if (seglen > len)
2806 seglen = len;
2807 flags_next = flags & ~MXGEFW_FLAGS_FIRST;
2808 cum_len_next = cum_len + seglen;
2809 if (mss) { /* TSO */
2810 (req - rdma_count)->rdma_count = rdma_count + 1;
2811
2812 if (likely(cum_len >= 0)) { /* payload */
2813 int next_is_first, chop;
2814
2815 chop = (cum_len_next > mss);
2816 cum_len_next = cum_len_next % mss;
2817 next_is_first = (cum_len_next == 0);
2818 flags |= chop * MXGEFW_FLAGS_TSO_CHOP;
2819 flags_next |= next_is_first *
2820 MXGEFW_FLAGS_FIRST;
2821 rdma_count |= -(chop | next_is_first);
2822 rdma_count += chop & !next_is_first;
2823 } else if (likely(cum_len_next >= 0)) { /* header ends */
2824 int small;
2825
2826 rdma_count = -1;
2827 cum_len_next = 0;
2828 seglen = -cum_len;
2829 small = (mss <= MXGEFW_SEND_SMALL_SIZE);
2830 flags_next = MXGEFW_FLAGS_TSO_PLD |
2831 MXGEFW_FLAGS_FIRST |
2832 (small * MXGEFW_FLAGS_SMALL);
2833 }
2834 }
2835 req->addr_high = high_swapped;
2836 req->addr_low = htonl(low);
2837 req->pseudo_hdr_offset = htons(pseudo_hdr_offset);
2838 req->pad = 0; /* complete solid 16-byte block; does this matter? */
2839 req->rdma_count = 1;
2840 req->length = htons(seglen);
2841 req->cksum_offset = cksum_offset;
2842 req->flags = flags | ((cum_len & 1) * odd_flag);
2843
2844 low += seglen;
2845 len -= seglen;
2846 cum_len = cum_len_next;
2847 flags = flags_next;
2848 req++;
2849 count++;
2850 rdma_count++;
2851 if (cksum_offset != 0 && !(mss && skb_is_gso_v6(skb))) {
2852 if (unlikely(cksum_offset > seglen))
2853 cksum_offset -= seglen;
2854 else
2855 cksum_offset = 0;
2856 }
2857 }
2858 if (frag_idx == frag_cnt)
2859 break;
2860
2861 /* map next fragment for DMA */
2862 idx = (count + tx->req) & tx->mask;
2863 frag = &skb_shinfo(skb)->frags[frag_idx];
2864 frag_idx++;
2865 len = frag->size;
2866 bus = pci_map_page(mgp->pdev, frag->page, frag->page_offset,
2867 len, PCI_DMA_TODEVICE);
2868 pci_unmap_addr_set(&tx->info[idx], bus, bus);
2869 pci_unmap_len_set(&tx->info[idx], len, len);
2870 }
2871
2872 (req - rdma_count)->rdma_count = rdma_count;
2873 if (mss)
2874 do {
2875 req--;
2876 req->flags |= MXGEFW_FLAGS_TSO_LAST;
2877 } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP |
2878 MXGEFW_FLAGS_FIRST)));
2879 idx = ((count - 1) + tx->req) & tx->mask;
2880 tx->info[idx].last = 1;
2881 myri10ge_submit_req(tx, tx->req_list, count);
2882 /* if using multiple tx queues, make sure NIC polls the
2883 * current slice */
2884 if ((mgp->dev->real_num_tx_queues > 1) && tx->queue_active == 0) {
2885 tx->queue_active = 1;
2886 put_be32(htonl(1), tx->send_go);
2887 mb();
2888 mmiowb();
2889 }
2890 tx->pkt_start++;
2891 if ((avail - count) < MXGEFW_MAX_SEND_DESC) {
2892 tx->stop_queue++;
2893 netif_tx_stop_queue(netdev_queue);
2894 }
2895 return NETDEV_TX_OK;
2896
2897 abort_linearize:
2898 /* Free any DMA resources we've alloced and clear out the skb
2899 * slot so as to not trip up assertions, and to avoid a
2900 * double-free if linearizing fails */
2901
2902 last_idx = (idx + 1) & tx->mask;
2903 idx = tx->req & tx->mask;
2904 tx->info[idx].skb = NULL;
2905 do {
2906 len = pci_unmap_len(&tx->info[idx], len);
2907 if (len) {
2908 if (tx->info[idx].skb != NULL)
2909 pci_unmap_single(mgp->pdev,
2910 pci_unmap_addr(&tx->info[idx],
2911 bus), len,
2912 PCI_DMA_TODEVICE);
2913 else
2914 pci_unmap_page(mgp->pdev,
2915 pci_unmap_addr(&tx->info[idx],
2916 bus), len,
2917 PCI_DMA_TODEVICE);
2918 pci_unmap_len_set(&tx->info[idx], len, 0);
2919 tx->info[idx].skb = NULL;
2920 }
2921 idx = (idx + 1) & tx->mask;
2922 } while (idx != last_idx);
2923 if (skb_is_gso(skb)) {
2924 netdev_err(mgp->dev, "TSO but wanted to linearize?!?!?\n");
2925 goto drop;
2926 }
2927
2928 if (skb_linearize(skb))
2929 goto drop;
2930
2931 tx->linearized++;
2932 goto again;
2933
2934 drop:
2935 dev_kfree_skb_any(skb);
2936 ss->stats.tx_dropped += 1;
2937 return NETDEV_TX_OK;
2938
2939 }
2940
2941 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
2942 struct net_device *dev)
2943 {
2944 struct sk_buff *segs, *curr;
2945 struct myri10ge_priv *mgp = netdev_priv(dev);
2946 struct myri10ge_slice_state *ss;
2947 netdev_tx_t status;
2948
2949 segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO6);
2950 if (IS_ERR(segs))
2951 goto drop;
2952
2953 while (segs) {
2954 curr = segs;
2955 segs = segs->next;
2956 curr->next = NULL;
2957 status = myri10ge_xmit(curr, dev);
2958 if (status != 0) {
2959 dev_kfree_skb_any(curr);
2960 if (segs != NULL) {
2961 curr = segs;
2962 segs = segs->next;
2963 curr->next = NULL;
2964 dev_kfree_skb_any(segs);
2965 }
2966 goto drop;
2967 }
2968 }
2969 dev_kfree_skb_any(skb);
2970 return NETDEV_TX_OK;
2971
2972 drop:
2973 ss = &mgp->ss[skb_get_queue_mapping(skb)];
2974 dev_kfree_skb_any(skb);
2975 ss->stats.tx_dropped += 1;
2976 return NETDEV_TX_OK;
2977 }
2978
2979 static struct net_device_stats *myri10ge_get_stats(struct net_device *dev)
2980 {
2981 struct myri10ge_priv *mgp = netdev_priv(dev);
2982 struct myri10ge_slice_netstats *slice_stats;
2983 struct net_device_stats *stats = &dev->stats;
2984 int i;
2985
2986 spin_lock(&mgp->stats_lock);
2987 memset(stats, 0, sizeof(*stats));
2988 for (i = 0; i < mgp->num_slices; i++) {
2989 slice_stats = &mgp->ss[i].stats;
2990 stats->rx_packets += slice_stats->rx_packets;
2991 stats->tx_packets += slice_stats->tx_packets;
2992 stats->rx_bytes += slice_stats->rx_bytes;
2993 stats->tx_bytes += slice_stats->tx_bytes;
2994 stats->rx_dropped += slice_stats->rx_dropped;
2995 stats->tx_dropped += slice_stats->tx_dropped;
2996 }
2997 spin_unlock(&mgp->stats_lock);
2998 return stats;
2999 }
3000
3001 static void myri10ge_set_multicast_list(struct net_device *dev)
3002 {
3003 struct myri10ge_priv *mgp = netdev_priv(dev);
3004 struct myri10ge_cmd cmd;
3005 struct dev_mc_list *mc_list;
3006 __be32 data[2] = { 0, 0 };
3007 int err;
3008
3009 /* can be called from atomic contexts,
3010 * pass 1 to force atomicity in myri10ge_send_cmd() */
3011 myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1);
3012
3013 /* This firmware is known to not support multicast */
3014 if (!mgp->fw_multicast_support)
3015 return;
3016
3017 /* Disable multicast filtering */
3018
3019 err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1);
3020 if (err != 0) {
3021 netdev_err(dev, "Failed MXGEFW_ENABLE_ALLMULTI, error status: %d\n",
3022 err);
3023 goto abort;
3024 }
3025
3026 if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) {
3027 /* request to disable multicast filtering, so quit here */
3028 return;
3029 }
3030
3031 /* Flush the filters */
3032
3033 err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS,
3034 &cmd, 1);
3035 if (err != 0) {
3036 netdev_err(dev, "Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS, error status: %d\n",
3037 err);
3038 goto abort;
3039 }
3040
3041 /* Walk the multicast list, and add each address */
3042 netdev_for_each_mc_addr(mc_list, dev) {
3043 memcpy(data, &mc_list->dmi_addr, 6);
3044 cmd.data0 = ntohl(data[0]);
3045 cmd.data1 = ntohl(data[1]);
3046 err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP,
3047 &cmd, 1);
3048
3049 if (err != 0) {
3050 netdev_err(dev, "Failed MXGEFW_JOIN_MULTICAST_GROUP, error status:%d %pM\n",
3051 err, mc_list->dmi_addr);
3052 goto abort;
3053 }
3054 }
3055 /* Enable multicast filtering */
3056 err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1);
3057 if (err != 0) {
3058 netdev_err(dev, "Failed MXGEFW_DISABLE_ALLMULTI, error status: %d\n",
3059 err);
3060 goto abort;
3061 }
3062
3063 return;
3064
3065 abort:
3066 return;
3067 }
3068
3069 static int myri10ge_set_mac_address(struct net_device *dev, void *addr)
3070 {
3071 struct sockaddr *sa = addr;
3072 struct myri10ge_priv *mgp = netdev_priv(dev);
3073 int status;
3074
3075 if (!is_valid_ether_addr(sa->sa_data))
3076 return -EADDRNOTAVAIL;
3077
3078 status = myri10ge_update_mac_address(mgp, sa->sa_data);
3079 if (status != 0) {
3080 netdev_err(dev, "changing mac address failed with %d\n",
3081 status);
3082 return status;
3083 }
3084
3085 /* change the dev structure */
3086 memcpy(dev->dev_addr, sa->sa_data, 6);
3087 return 0;
3088 }
3089
3090 static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
3091 {
3092 struct myri10ge_priv *mgp = netdev_priv(dev);
3093 int error = 0;
3094
3095 if ((new_mtu < 68) || (ETH_HLEN + new_mtu > MYRI10GE_MAX_ETHER_MTU)) {
3096 netdev_err(dev, "new mtu (%d) is not valid\n", new_mtu);
3097 return -EINVAL;
3098 }
3099 netdev_info(dev, "changing mtu from %d to %d\n", dev->mtu, new_mtu);
3100 if (mgp->running) {
3101 /* if we change the mtu on an active device, we must
3102 * reset the device so the firmware sees the change */
3103 myri10ge_close(dev);
3104 dev->mtu = new_mtu;
3105 myri10ge_open(dev);
3106 } else
3107 dev->mtu = new_mtu;
3108
3109 return error;
3110 }
3111
3112 /*
3113 * Enable ECRC to align PCI-E Completion packets on an 8-byte boundary.
3114 * Only do it if the bridge is a root port since we don't want to disturb
3115 * any other device, except if forced with myri10ge_ecrc_enable > 1.
3116 */
3117
3118 static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
3119 {
3120 struct pci_dev *bridge = mgp->pdev->bus->self;
3121 struct device *dev = &mgp->pdev->dev;
3122 unsigned cap;
3123 unsigned err_cap;
3124 u16 val;
3125 u8 ext_type;
3126 int ret;
3127
3128 if (!myri10ge_ecrc_enable || !bridge)
3129 return;
3130
3131 /* check that the bridge is a root port */
3132 cap = pci_find_capability(bridge, PCI_CAP_ID_EXP);
3133 pci_read_config_word(bridge, cap + PCI_CAP_FLAGS, &val);
3134 ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
3135 if (ext_type != PCI_EXP_TYPE_ROOT_PORT) {
3136 if (myri10ge_ecrc_enable > 1) {
3137 struct pci_dev *prev_bridge, *old_bridge = bridge;
3138
3139 /* Walk the hierarchy up to the root port
3140 * where ECRC has to be enabled */
3141 do {
3142 prev_bridge = bridge;
3143 bridge = bridge->bus->self;
3144 if (!bridge || prev_bridge == bridge) {
3145 dev_err(dev,
3146 "Failed to find root port"
3147 " to force ECRC\n");
3148 return;
3149 }
3150 cap =
3151 pci_find_capability(bridge, PCI_CAP_ID_EXP);
3152 pci_read_config_word(bridge,
3153 cap + PCI_CAP_FLAGS, &val);
3154 ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
3155 } while (ext_type != PCI_EXP_TYPE_ROOT_PORT);
3156
3157 dev_info(dev,
3158 "Forcing ECRC on non-root port %s"
3159 " (enabling on root port %s)\n",
3160 pci_name(old_bridge), pci_name(bridge));
3161 } else {
3162 dev_err(dev,
3163 "Not enabling ECRC on non-root port %s\n",
3164 pci_name(bridge));
3165 return;
3166 }
3167 }
3168
3169 cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
3170 if (!cap)
3171 return;
3172
3173 ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap);
3174 if (ret) {
3175 dev_err(dev, "failed reading ext-conf-space of %s\n",
3176 pci_name(bridge));
3177 dev_err(dev, "\t pci=nommconf in use? "
3178 "or buggy/incomplete/absent ACPI MCFG attr?\n");
3179 return;
3180 }
3181 if (!(err_cap & PCI_ERR_CAP_ECRC_GENC))
3182 return;
3183
3184 err_cap |= PCI_ERR_CAP_ECRC_GENE;
3185 pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap);
3186 dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge));
3187 }
3188
3189 /*
3190 * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput
3191 * when the PCI-E Completion packets are aligned on an 8-byte
3192 * boundary. Some PCI-E chip sets always align Completion packets; on
3193 * the ones that do not, the alignment can be enforced by enabling
3194 * ECRC generation (if supported).
3195 *
3196 * When PCI-E Completion packets are not aligned, it is actually more
3197 * efficient to limit Read-DMA transactions to 2KB, rather than 4KB.
3198 *
3199 * If the driver can neither enable ECRC nor verify that it has
3200 * already been enabled, then it must use a firmware image which works
3201 * around unaligned completion packets (myri10ge_rss_ethp_z8e.dat), and it
3202 * should also ensure that it never gives the device a Read-DMA which is
3203 * larger than 2KB by setting the tx_boundary to 2KB. If ECRC is
3204 * enabled, then the driver should use the aligned (myri10ge_rss_eth_z8e.dat)
3205 * firmware image, and set tx_boundary to 4KB.
3206 */
3207
3208 static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
3209 {
3210 struct pci_dev *pdev = mgp->pdev;
3211 struct device *dev = &pdev->dev;
3212 int status;
3213
3214 mgp->tx_boundary = 4096;
3215 /*
3216 * Verify the max read request size was set to 4KB
3217 * before trying the test with 4KB.
3218 */
3219 status = pcie_get_readrq(pdev);
3220 if (status < 0) {
3221 dev_err(dev, "Couldn't read max read req size: %d\n", status);
3222 goto abort;
3223 }
3224 if (status != 4096) {
3225 dev_warn(dev, "Max Read Request size != 4096 (%d)\n", status);
3226 mgp->tx_boundary = 2048;
3227 }
3228 /*
3229 * load the optimized firmware (which assumes aligned PCIe
3230 * completions) in order to see if it works on this host.
3231 */
3232 mgp->fw_name = myri10ge_fw_aligned;
3233 status = myri10ge_load_firmware(mgp, 1);
3234 if (status != 0) {
3235 goto abort;
3236 }
3237
3238 /*
3239 * Enable ECRC if possible
3240 */
3241 myri10ge_enable_ecrc(mgp);
3242
3243 /*
3244 * Run a DMA test which watches for unaligned completions and
3245 * aborts on the first one seen.
3246 */
3247
3248 status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST);
3249 if (status == 0)
3250 return; /* keep the aligned firmware */
3251
3252 if (status != -E2BIG)
3253 dev_warn(dev, "DMA test failed: %d\n", status);
3254 if (status == -ENOSYS)
3255 dev_warn(dev, "Falling back to ethp! "
3256 "Please install up to date fw\n");
3257 abort:
3258 /* fall back to using the unaligned firmware */
3259 mgp->tx_boundary = 2048;
3260 mgp->fw_name = myri10ge_fw_unaligned;
3261
3262 }
3263
3264 static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
3265 {
3266 int overridden = 0;
3267
3268 if (myri10ge_force_firmware == 0) {
3269 int link_width, exp_cap;
3270 u16 lnk;
3271
3272 exp_cap = pci_find_capability(mgp->pdev, PCI_CAP_ID_EXP);
3273 pci_read_config_word(mgp->pdev, exp_cap + PCI_EXP_LNKSTA, &lnk);
3274 link_width = (lnk >> 4) & 0x3f;
3275
3276 /* Check to see if Link is less than 8 or if the
3277 * upstream bridge is known to provide aligned
3278 * completions */
3279 if (link_width < 8) {
3280 dev_info(&mgp->pdev->dev, "PCIE x%d Link\n",
3281 link_width);
3282 mgp->tx_boundary = 4096;
3283 mgp->fw_name = myri10ge_fw_aligned;
3284 } else {
3285 myri10ge_firmware_probe(mgp);
3286 }
3287 } else {
3288 if (myri10ge_force_firmware == 1) {
3289 dev_info(&mgp->pdev->dev,
3290 "Assuming aligned completions (forced)\n");
3291 mgp->tx_boundary = 4096;
3292 mgp->fw_name = myri10ge_fw_aligned;
3293 } else {
3294 dev_info(&mgp->pdev->dev,
3295 "Assuming unaligned completions (forced)\n");
3296 mgp->tx_boundary = 2048;
3297 mgp->fw_name = myri10ge_fw_unaligned;
3298 }
3299 }
3300 if (myri10ge_fw_name != NULL) {
3301 overridden = 1;
3302 mgp->fw_name = myri10ge_fw_name;
3303 }
3304 if (mgp->board_number < MYRI10GE_MAX_BOARDS &&
3305 myri10ge_fw_names[mgp->board_number] != NULL &&
3306 strlen(myri10ge_fw_names[mgp->board_number])) {
3307 mgp->fw_name = myri10ge_fw_names[mgp->board_number];
3308 overridden = 1;
3309 }
3310 if (overridden)
3311 dev_info(&mgp->pdev->dev, "overriding firmware to %s\n",
3312 mgp->fw_name);
3313 }
3314
3315 #ifdef CONFIG_PM
3316 static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state)
3317 {
3318 struct myri10ge_priv *mgp;
3319 struct net_device *netdev;
3320
3321 mgp = pci_get_drvdata(pdev);
3322 if (mgp == NULL)
3323 return -EINVAL;
3324 netdev = mgp->dev;
3325
3326 netif_device_detach(netdev);
3327 if (netif_running(netdev)) {
3328 netdev_info(netdev, "closing\n");
3329 rtnl_lock();
3330 myri10ge_close(netdev);
3331 rtnl_unlock();
3332 }
3333 myri10ge_dummy_rdma(mgp, 0);
3334 pci_save_state(pdev);
3335 pci_disable_device(pdev);
3336
3337 return pci_set_power_state(pdev, pci_choose_state(pdev, state));
3338 }
3339
3340 static int myri10ge_resume(struct pci_dev *pdev)
3341 {
3342 struct myri10ge_priv *mgp;
3343 struct net_device *netdev;
3344 int status;
3345 u16 vendor;
3346
3347 mgp = pci_get_drvdata(pdev);
3348 if (mgp == NULL)
3349 return -EINVAL;
3350 netdev = mgp->dev;
3351 pci_set_power_state(pdev, 0); /* zeros conf space as a side effect */
3352 msleep(5); /* give card time to respond */
3353 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3354 if (vendor == 0xffff) {
3355 netdev_err(mgp->dev, "device disappeared!\n");
3356 return -EIO;
3357 }
3358
3359 status = pci_restore_state(pdev);
3360 if (status)
3361 return status;
3362
3363 status = pci_enable_device(pdev);
3364 if (status) {
3365 dev_err(&pdev->dev, "failed to enable device\n");
3366 return status;
3367 }
3368
3369 pci_set_master(pdev);
3370
3371 myri10ge_reset(mgp);
3372 myri10ge_dummy_rdma(mgp, 1);
3373
3374 /* Save configuration space to be restored if the
3375 * nic resets due to a parity error */
3376 pci_save_state(pdev);
3377
3378 if (netif_running(netdev)) {
3379 rtnl_lock();
3380 status = myri10ge_open(netdev);
3381 rtnl_unlock();
3382 if (status != 0)
3383 goto abort_with_enabled;
3384
3385 }
3386 netif_device_attach(netdev);
3387
3388 return 0;
3389
3390 abort_with_enabled:
3391 pci_disable_device(pdev);
3392 return -EIO;
3393
3394 }
3395 #endif /* CONFIG_PM */
3396
3397 static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp)
3398 {
3399 struct pci_dev *pdev = mgp->pdev;
3400 int vs = mgp->vendor_specific_offset;
3401 u32 reboot;
3402
3403 /*enter read32 mode */
3404 pci_write_config_byte(pdev, vs + 0x10, 0x3);
3405
3406 /*read REBOOT_STATUS (0xfffffff0) */
3407 pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0);
3408 pci_read_config_dword(pdev, vs + 0x14, &reboot);
3409 return reboot;
3410 }
3411
3412 /*
3413 * This watchdog is used to check whether the board has suffered
3414 * from a parity error and needs to be recovered.
3415 */
3416 static void myri10ge_watchdog(struct work_struct *work)
3417 {
3418 struct myri10ge_priv *mgp =
3419 container_of(work, struct myri10ge_priv, watchdog_work);
3420 struct myri10ge_tx_buf *tx;
3421 u32 reboot;
3422 int status, rebooted;
3423 int i;
3424 u16 cmd, vendor;
3425
3426 mgp->watchdog_resets++;
3427 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3428 rebooted = 0;
3429 if ((cmd & PCI_COMMAND_MASTER) == 0) {
3430 /* Bus master DMA disabled? Check to see
3431 * if the card rebooted due to a parity error
3432 * For now, just report it */
3433 reboot = myri10ge_read_reboot(mgp);
3434 netdev_err(mgp->dev, "NIC rebooted (0x%x),%s resetting\n",
3435 reboot,
3436 myri10ge_reset_recover ? "" : " not");
3437 if (myri10ge_reset_recover == 0)
3438 return;
3439 rtnl_lock();
3440 mgp->rebooted = 1;
3441 rebooted = 1;
3442 myri10ge_close(mgp->dev);
3443 myri10ge_reset_recover--;
3444 mgp->rebooted = 0;
3445 /*
3446 * A rebooted nic will come back with config space as
3447 * it was after power was applied to PCIe bus.
3448 * Attempt to restore config space which was saved
3449 * when the driver was loaded, or the last time the
3450 * nic was resumed from power saving mode.
3451 */
3452 pci_restore_state(mgp->pdev);
3453
3454 /* save state again for accounting reasons */
3455 pci_save_state(mgp->pdev);
3456
3457 } else {
3458 /* if we get back -1's from our slot, perhaps somebody
3459 * powered off our card. Don't try to reset it in
3460 * this case */
3461 if (cmd == 0xffff) {
3462 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3463 if (vendor == 0xffff) {
3464 netdev_err(mgp->dev, "device disappeared!\n");
3465 return;
3466 }
3467 }
3468 /* Perhaps it is a software error. Try to reset */
3469
3470 netdev_err(mgp->dev, "device timeout, resetting\n");
3471 for (i = 0; i < mgp->num_slices; i++) {
3472 tx = &mgp->ss[i].tx;
3473 netdev_err(mgp->dev, "(%d): %d %d %d %d %d %d\n",
3474 i, tx->queue_active, tx->req,
3475 tx->done, tx->pkt_start, tx->pkt_done,
3476 (int)ntohl(mgp->ss[i].fw_stats->
3477 send_done_count));
3478 msleep(2000);
3479 netdev_info(mgp->dev, "(%d): %d %d %d %d %d %d\n",
3480 i, tx->queue_active, tx->req,
3481 tx->done, tx->pkt_start, tx->pkt_done,
3482 (int)ntohl(mgp->ss[i].fw_stats->
3483 send_done_count));
3484 }
3485 }
3486
3487 if (!rebooted) {
3488 rtnl_lock();
3489 myri10ge_close(mgp->dev);
3490 }
3491 status = myri10ge_load_firmware(mgp, 1);
3492 if (status != 0)
3493 netdev_err(mgp->dev, "failed to load firmware\n");
3494 else
3495 myri10ge_open(mgp->dev);
3496 rtnl_unlock();
3497 }
3498
3499 /*
3500 * We use our own timer routine rather than relying upon
3501 * netdev->tx_timeout because we have a very large hardware transmit
3502 * queue. Due to the large queue, the netdev->tx_timeout function
3503 * cannot detect a NIC with a parity error in a timely fashion if the
3504 * NIC is lightly loaded.
3505 */
3506 static void myri10ge_watchdog_timer(unsigned long arg)
3507 {
3508 struct myri10ge_priv *mgp;
3509 struct myri10ge_slice_state *ss;
3510 int i, reset_needed, busy_slice_cnt;
3511 u32 rx_pause_cnt;
3512 u16 cmd;
3513
3514 mgp = (struct myri10ge_priv *)arg;
3515
3516 rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3517 busy_slice_cnt = 0;
3518 for (i = 0, reset_needed = 0;
3519 i < mgp->num_slices && reset_needed == 0; ++i) {
3520
3521 ss = &mgp->ss[i];
3522 if (ss->rx_small.watchdog_needed) {
3523 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
3524 mgp->small_bytes + MXGEFW_PAD,
3525 1);
3526 if (ss->rx_small.fill_cnt - ss->rx_small.cnt >=
3527 myri10ge_fill_thresh)
3528 ss->rx_small.watchdog_needed = 0;
3529 }
3530 if (ss->rx_big.watchdog_needed) {
3531 myri10ge_alloc_rx_pages(mgp, &ss->rx_big,
3532 mgp->big_bytes, 1);
3533 if (ss->rx_big.fill_cnt - ss->rx_big.cnt >=
3534 myri10ge_fill_thresh)
3535 ss->rx_big.watchdog_needed = 0;
3536 }
3537
3538 if (ss->tx.req != ss->tx.done &&
3539 ss->tx.done == ss->watchdog_tx_done &&
3540 ss->watchdog_tx_req != ss->watchdog_tx_done) {
3541 /* nic seems like it might be stuck.. */
3542 if (rx_pause_cnt != mgp->watchdog_pause) {
3543 if (net_ratelimit())
3544 netdev_err(mgp->dev, "slice %d: TX paused, check link partner\n",
3545 i);
3546 } else {
3547 netdev_warn(mgp->dev, "slice %d stuck:", i);
3548 reset_needed = 1;
3549 }
3550 }
3551 if (ss->watchdog_tx_done != ss->tx.done ||
3552 ss->watchdog_rx_done != ss->rx_done.cnt) {
3553 busy_slice_cnt++;
3554 }
3555 ss->watchdog_tx_done = ss->tx.done;
3556 ss->watchdog_tx_req = ss->tx.req;
3557 ss->watchdog_rx_done = ss->rx_done.cnt;
3558 }
3559 /* if we've sent or received no traffic, poll the NIC to
3560 * ensure it is still there. Otherwise, we risk not noticing
3561 * an error in a timely fashion */
3562 if (busy_slice_cnt == 0) {
3563 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3564 if ((cmd & PCI_COMMAND_MASTER) == 0) {
3565 reset_needed = 1;
3566 }
3567 }
3568 mgp->watchdog_pause = rx_pause_cnt;
3569
3570 if (reset_needed) {
3571 schedule_work(&mgp->watchdog_work);
3572 } else {
3573 /* rearm timer */
3574 mod_timer(&mgp->watchdog_timer,
3575 jiffies + myri10ge_watchdog_timeout * HZ);
3576 }
3577 }
3578
3579 static void myri10ge_free_slices(struct myri10ge_priv *mgp)
3580 {
3581 struct myri10ge_slice_state *ss;
3582 struct pci_dev *pdev = mgp->pdev;
3583 size_t bytes;
3584 int i;
3585
3586 if (mgp->ss == NULL)
3587 return;
3588
3589 for (i = 0; i < mgp->num_slices; i++) {
3590 ss = &mgp->ss[i];
3591 if (ss->rx_done.entry != NULL) {
3592 bytes = mgp->max_intr_slots *
3593 sizeof(*ss->rx_done.entry);
3594 dma_free_coherent(&pdev->dev, bytes,
3595 ss->rx_done.entry, ss->rx_done.bus);
3596 ss->rx_done.entry = NULL;
3597 }
3598 if (ss->fw_stats != NULL) {
3599 bytes = sizeof(*ss->fw_stats);
3600 dma_free_coherent(&pdev->dev, bytes,
3601 ss->fw_stats, ss->fw_stats_bus);
3602 ss->fw_stats = NULL;
3603 }
3604 }
3605 kfree(mgp->ss);
3606 mgp->ss = NULL;
3607 }
3608
3609 static int myri10ge_alloc_slices(struct myri10ge_priv *mgp)
3610 {
3611 struct myri10ge_slice_state *ss;
3612 struct pci_dev *pdev = mgp->pdev;
3613 size_t bytes;
3614 int i;
3615
3616 bytes = sizeof(*mgp->ss) * mgp->num_slices;
3617 mgp->ss = kzalloc(bytes, GFP_KERNEL);
3618 if (mgp->ss == NULL) {
3619 return -ENOMEM;
3620 }
3621
3622 for (i = 0; i < mgp->num_slices; i++) {
3623 ss = &mgp->ss[i];
3624 bytes = mgp->max_intr_slots * sizeof(*ss->rx_done.entry);
3625 ss->rx_done.entry = dma_alloc_coherent(&pdev->dev, bytes,
3626 &ss->rx_done.bus,
3627 GFP_KERNEL);
3628 if (ss->rx_done.entry == NULL)
3629 goto abort;
3630 memset(ss->rx_done.entry, 0, bytes);
3631 bytes = sizeof(*ss->fw_stats);
3632 ss->fw_stats = dma_alloc_coherent(&pdev->dev, bytes,
3633 &ss->fw_stats_bus,
3634 GFP_KERNEL);
3635 if (ss->fw_stats == NULL)
3636 goto abort;
3637 ss->mgp = mgp;
3638 ss->dev = mgp->dev;
3639 netif_napi_add(ss->dev, &ss->napi, myri10ge_poll,
3640 myri10ge_napi_weight);
3641 }
3642 return 0;
3643 abort:
3644 myri10ge_free_slices(mgp);
3645 return -ENOMEM;
3646 }
3647
3648 /*
3649 * This function determines the number of slices supported.
3650 * The number slices is the minumum of the number of CPUS,
3651 * the number of MSI-X irqs supported, the number of slices
3652 * supported by the firmware
3653 */
3654 static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
3655 {
3656 struct myri10ge_cmd cmd;
3657 struct pci_dev *pdev = mgp->pdev;
3658 char *old_fw;
3659 int i, status, ncpus, msix_cap;
3660
3661 mgp->num_slices = 1;
3662 msix_cap = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3663 ncpus = num_online_cpus();
3664
3665 if (myri10ge_max_slices == 1 || msix_cap == 0 ||
3666 (myri10ge_max_slices == -1 && ncpus < 2))
3667 return;
3668
3669 /* try to load the slice aware rss firmware */
3670 old_fw = mgp->fw_name;
3671 if (myri10ge_fw_name != NULL) {
3672 dev_info(&mgp->pdev->dev, "overriding rss firmware to %s\n",
3673 myri10ge_fw_name);
3674 mgp->fw_name = myri10ge_fw_name;
3675 } else if (old_fw == myri10ge_fw_aligned)
3676 mgp->fw_name = myri10ge_fw_rss_aligned;
3677 else
3678 mgp->fw_name = myri10ge_fw_rss_unaligned;
3679 status = myri10ge_load_firmware(mgp, 0);
3680 if (status != 0) {
3681 dev_info(&pdev->dev, "Rss firmware not found\n");
3682 return;
3683 }
3684
3685 /* hit the board with a reset to ensure it is alive */
3686 memset(&cmd, 0, sizeof(cmd));
3687 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
3688 if (status != 0) {
3689 dev_err(&mgp->pdev->dev, "failed reset\n");
3690 goto abort_with_fw;
3691 }
3692
3693 mgp->max_intr_slots = cmd.data0 / sizeof(struct mcp_slot);
3694
3695 /* tell it the size of the interrupt queues */
3696 cmd.data0 = mgp->max_intr_slots * sizeof(struct mcp_slot);
3697 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
3698 if (status != 0) {
3699 dev_err(&mgp->pdev->dev, "failed MXGEFW_CMD_SET_INTRQ_SIZE\n");
3700 goto abort_with_fw;
3701 }
3702
3703 /* ask the maximum number of slices it supports */
3704 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES, &cmd, 0);
3705 if (status != 0)
3706 goto abort_with_fw;
3707 else
3708 mgp->num_slices = cmd.data0;
3709
3710 /* Only allow multiple slices if MSI-X is usable */
3711 if (!myri10ge_msi) {
3712 goto abort_with_fw;
3713 }
3714
3715 /* if the admin did not specify a limit to how many
3716 * slices we should use, cap it automatically to the
3717 * number of CPUs currently online */
3718 if (myri10ge_max_slices == -1)
3719 myri10ge_max_slices = ncpus;
3720
3721 if (mgp->num_slices > myri10ge_max_slices)
3722 mgp->num_slices = myri10ge_max_slices;
3723
3724 /* Now try to allocate as many MSI-X vectors as we have
3725 * slices. We give up on MSI-X if we can only get a single
3726 * vector. */
3727
3728 mgp->msix_vectors = kzalloc(mgp->num_slices *
3729 sizeof(*mgp->msix_vectors), GFP_KERNEL);
3730 if (mgp->msix_vectors == NULL)
3731 goto disable_msix;
3732 for (i = 0; i < mgp->num_slices; i++) {
3733 mgp->msix_vectors[i].entry = i;
3734 }
3735
3736 while (mgp->num_slices > 1) {
3737 /* make sure it is a power of two */
3738 while (!is_power_of_2(mgp->num_slices))
3739 mgp->num_slices--;
3740 if (mgp->num_slices == 1)
3741 goto disable_msix;
3742 status = pci_enable_msix(pdev, mgp->msix_vectors,
3743 mgp->num_slices);
3744 if (status == 0) {
3745 pci_disable_msix(pdev);
3746 return;
3747 }
3748 if (status > 0)
3749 mgp->num_slices = status;
3750 else
3751 goto disable_msix;
3752 }
3753
3754 disable_msix:
3755 if (mgp->msix_vectors != NULL) {
3756 kfree(mgp->msix_vectors);
3757 mgp->msix_vectors = NULL;
3758 }
3759
3760 abort_with_fw:
3761 mgp->num_slices = 1;
3762 mgp->fw_name = old_fw;
3763 myri10ge_load_firmware(mgp, 0);
3764 }
3765
3766 static const struct net_device_ops myri10ge_netdev_ops = {
3767 .ndo_open = myri10ge_open,
3768 .ndo_stop = myri10ge_close,
3769 .ndo_start_xmit = myri10ge_xmit,
3770 .ndo_get_stats = myri10ge_get_stats,
3771 .ndo_validate_addr = eth_validate_addr,
3772 .ndo_change_mtu = myri10ge_change_mtu,
3773 .ndo_set_multicast_list = myri10ge_set_multicast_list,
3774 .ndo_set_mac_address = myri10ge_set_mac_address,
3775 };
3776
3777 static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3778 {
3779 struct net_device *netdev;
3780 struct myri10ge_priv *mgp;
3781 struct device *dev = &pdev->dev;
3782 int i;
3783 int status = -ENXIO;
3784 int dac_enabled;
3785 unsigned hdr_offset, ss_offset;
3786 static int board_number;
3787
3788 netdev = alloc_etherdev_mq(sizeof(*mgp), MYRI10GE_MAX_SLICES);
3789 if (netdev == NULL) {
3790 dev_err(dev, "Could not allocate ethernet device\n");
3791 return -ENOMEM;
3792 }
3793
3794 SET_NETDEV_DEV(netdev, &pdev->dev);
3795
3796 mgp = netdev_priv(netdev);
3797 mgp->dev = netdev;
3798 mgp->pdev = pdev;
3799 mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
3800 mgp->pause = myri10ge_flow_control;
3801 mgp->intr_coal_delay = myri10ge_intr_coal_delay;
3802 mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT);
3803 mgp->board_number = board_number;
3804 init_waitqueue_head(&mgp->down_wq);
3805
3806 if (pci_enable_device(pdev)) {
3807 dev_err(&pdev->dev, "pci_enable_device call failed\n");
3808 status = -ENODEV;
3809 goto abort_with_netdev;
3810 }
3811
3812 /* Find the vendor-specific cap so we can check
3813 * the reboot register later on */
3814 mgp->vendor_specific_offset
3815 = pci_find_capability(pdev, PCI_CAP_ID_VNDR);
3816
3817 /* Set our max read request to 4KB */
3818 status = pcie_set_readrq(pdev, 4096);
3819 if (status != 0) {
3820 dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n",
3821 status);
3822 goto abort_with_enabled;
3823 }
3824
3825 pci_set_master(pdev);
3826 dac_enabled = 1;
3827 status = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
3828 if (status != 0) {
3829 dac_enabled = 0;
3830 dev_err(&pdev->dev,
3831 "64-bit pci address mask was refused, "
3832 "trying 32-bit\n");
3833 status = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3834 }
3835 if (status != 0) {
3836 dev_err(&pdev->dev, "Error %d setting DMA mask\n", status);
3837 goto abort_with_enabled;
3838 }
3839 (void)pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
3840 mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd),
3841 &mgp->cmd_bus, GFP_KERNEL);
3842 if (mgp->cmd == NULL)
3843 goto abort_with_enabled;
3844
3845 mgp->board_span = pci_resource_len(pdev, 0);
3846 mgp->iomem_base = pci_resource_start(pdev, 0);
3847 mgp->mtrr = -1;
3848 mgp->wc_enabled = 0;
3849 #ifdef CONFIG_MTRR
3850 mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span,
3851 MTRR_TYPE_WRCOMB, 1);
3852 if (mgp->mtrr >= 0)
3853 mgp->wc_enabled = 1;
3854 #endif
3855 mgp->sram = ioremap_wc(mgp->iomem_base, mgp->board_span);
3856 if (mgp->sram == NULL) {
3857 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n",
3858 mgp->board_span, mgp->iomem_base);
3859 status = -ENXIO;
3860 goto abort_with_mtrr;
3861 }
3862 hdr_offset =
3863 ntohl(__raw_readl(mgp->sram + MCP_HEADER_PTR_OFFSET)) & 0xffffc;
3864 ss_offset = hdr_offset + offsetof(struct mcp_gen_header, string_specs);
3865 mgp->sram_size = ntohl(__raw_readl(mgp->sram + ss_offset));
3866 if (mgp->sram_size > mgp->board_span ||
3867 mgp->sram_size <= MYRI10GE_FW_OFFSET) {
3868 dev_err(&pdev->dev,
3869 "invalid sram_size %dB or board span %ldB\n",
3870 mgp->sram_size, mgp->board_span);
3871 goto abort_with_ioremap;
3872 }
3873 memcpy_fromio(mgp->eeprom_strings,
3874 mgp->sram + mgp->sram_size, MYRI10GE_EEPROM_STRINGS_SIZE);
3875 memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2);
3876 status = myri10ge_read_mac_addr(mgp);
3877 if (status)
3878 goto abort_with_ioremap;
3879
3880 for (i = 0; i < ETH_ALEN; i++)
3881 netdev->dev_addr[i] = mgp->mac_addr[i];
3882
3883 myri10ge_select_firmware(mgp);
3884
3885 status = myri10ge_load_firmware(mgp, 1);
3886 if (status != 0) {
3887 dev_err(&pdev->dev, "failed to load firmware\n");
3888 goto abort_with_ioremap;
3889 }
3890 myri10ge_probe_slices(mgp);
3891 status = myri10ge_alloc_slices(mgp);
3892 if (status != 0) {
3893 dev_err(&pdev->dev, "failed to alloc slice state\n");
3894 goto abort_with_firmware;
3895 }
3896 netdev->real_num_tx_queues = mgp->num_slices;
3897 status = myri10ge_reset(mgp);
3898 if (status != 0) {
3899 dev_err(&pdev->dev, "failed reset\n");
3900 goto abort_with_slices;
3901 }
3902 #ifdef CONFIG_MYRI10GE_DCA
3903 myri10ge_setup_dca(mgp);
3904 #endif
3905 pci_set_drvdata(pdev, mgp);
3906 if ((myri10ge_initial_mtu + ETH_HLEN) > MYRI10GE_MAX_ETHER_MTU)
3907 myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
3908 if ((myri10ge_initial_mtu + ETH_HLEN) < 68)
3909 myri10ge_initial_mtu = 68;
3910
3911 netdev->netdev_ops = &myri10ge_netdev_ops;
3912 netdev->mtu = myri10ge_initial_mtu;
3913 netdev->base_addr = mgp->iomem_base;
3914 netdev->features = mgp->features;
3915
3916 if (dac_enabled)
3917 netdev->features |= NETIF_F_HIGHDMA;
3918 netdev->features |= NETIF_F_LRO;
3919
3920 netdev->vlan_features |= mgp->features;
3921 if (mgp->fw_ver_tiny < 37)
3922 netdev->vlan_features &= ~NETIF_F_TSO6;
3923 if (mgp->fw_ver_tiny < 32)
3924 netdev->vlan_features &= ~NETIF_F_TSO;
3925
3926 /* make sure we can get an irq, and that MSI can be
3927 * setup (if available). Also ensure netdev->irq
3928 * is set to correct value if MSI is enabled */
3929 status = myri10ge_request_irq(mgp);
3930 if (status != 0)
3931 goto abort_with_firmware;
3932 netdev->irq = pdev->irq;
3933 myri10ge_free_irq(mgp);
3934
3935 /* Save configuration space to be restored if the
3936 * nic resets due to a parity error */
3937 pci_save_state(pdev);
3938
3939 /* Setup the watchdog timer */
3940 setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer,
3941 (unsigned long)mgp);
3942
3943 spin_lock_init(&mgp->stats_lock);
3944 SET_ETHTOOL_OPS(netdev, &myri10ge_ethtool_ops);
3945 INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog);
3946 status = register_netdev(netdev);
3947 if (status != 0) {
3948 dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
3949 goto abort_with_state;
3950 }
3951 if (mgp->msix_enabled)
3952 dev_info(dev, "%d MSI-X IRQs, tx bndry %d, fw %s, WC %s\n",
3953 mgp->num_slices, mgp->tx_boundary, mgp->fw_name,
3954 (mgp->wc_enabled ? "Enabled" : "Disabled"));
3955 else
3956 dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, WC %s\n",
3957 mgp->msi_enabled ? "MSI" : "xPIC",
3958 netdev->irq, mgp->tx_boundary, mgp->fw_name,
3959 (mgp->wc_enabled ? "Enabled" : "Disabled"));
3960
3961 board_number++;
3962 return 0;
3963
3964 abort_with_state:
3965 pci_restore_state(pdev);
3966
3967 abort_with_slices:
3968 myri10ge_free_slices(mgp);
3969
3970 abort_with_firmware:
3971 myri10ge_dummy_rdma(mgp, 0);
3972
3973 abort_with_ioremap:
3974 if (mgp->mac_addr_string != NULL)
3975 dev_err(&pdev->dev,
3976 "myri10ge_probe() failed: MAC=%s, SN=%ld\n",
3977 mgp->mac_addr_string, mgp->serial_number);
3978 iounmap(mgp->sram);
3979
3980 abort_with_mtrr:
3981 #ifdef CONFIG_MTRR
3982 if (mgp->mtrr >= 0)
3983 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
3984 #endif
3985 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
3986 mgp->cmd, mgp->cmd_bus);
3987
3988 abort_with_enabled:
3989 pci_disable_device(pdev);
3990
3991 abort_with_netdev:
3992 free_netdev(netdev);
3993 return status;
3994 }
3995
3996 /*
3997 * myri10ge_remove
3998 *
3999 * Does what is necessary to shutdown one Myrinet device. Called
4000 * once for each Myrinet card by the kernel when a module is
4001 * unloaded.
4002 */
4003 static void myri10ge_remove(struct pci_dev *pdev)
4004 {
4005 struct myri10ge_priv *mgp;
4006 struct net_device *netdev;
4007
4008 mgp = pci_get_drvdata(pdev);
4009 if (mgp == NULL)
4010 return;
4011
4012 flush_scheduled_work();
4013 netdev = mgp->dev;
4014 unregister_netdev(netdev);
4015
4016 #ifdef CONFIG_MYRI10GE_DCA
4017 myri10ge_teardown_dca(mgp);
4018 #endif
4019 myri10ge_dummy_rdma(mgp, 0);
4020
4021 /* avoid a memory leak */
4022 pci_restore_state(pdev);
4023
4024 iounmap(mgp->sram);
4025
4026 #ifdef CONFIG_MTRR
4027 if (mgp->mtrr >= 0)
4028 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
4029 #endif
4030 myri10ge_free_slices(mgp);
4031 if (mgp->msix_vectors != NULL)
4032 kfree(mgp->msix_vectors);
4033 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
4034 mgp->cmd, mgp->cmd_bus);
4035
4036 free_netdev(netdev);
4037 pci_disable_device(pdev);
4038 pci_set_drvdata(pdev, NULL);
4039 }
4040
4041 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E 0x0008
4042 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9 0x0009
4043
4044 static DEFINE_PCI_DEVICE_TABLE(myri10ge_pci_tbl) = {
4045 {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)},
4046 {PCI_DEVICE
4047 (PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9)},
4048 {0},
4049 };
4050
4051 MODULE_DEVICE_TABLE(pci, myri10ge_pci_tbl);
4052
4053 static struct pci_driver myri10ge_driver = {
4054 .name = "myri10ge",
4055 .probe = myri10ge_probe,
4056 .remove = myri10ge_remove,
4057 .id_table = myri10ge_pci_tbl,
4058 #ifdef CONFIG_PM
4059 .suspend = myri10ge_suspend,
4060 .resume = myri10ge_resume,
4061 #endif
4062 };
4063
4064 #ifdef CONFIG_MYRI10GE_DCA
4065 static int
4066 myri10ge_notify_dca(struct notifier_block *nb, unsigned long event, void *p)
4067 {
4068 int err = driver_for_each_device(&myri10ge_driver.driver,
4069 NULL, &event,
4070 myri10ge_notify_dca_device);
4071
4072 if (err)
4073 return NOTIFY_BAD;
4074 return NOTIFY_DONE;
4075 }
4076
4077 static struct notifier_block myri10ge_dca_notifier = {
4078 .notifier_call = myri10ge_notify_dca,
4079 .next = NULL,
4080 .priority = 0,
4081 };
4082 #endif /* CONFIG_MYRI10GE_DCA */
4083
4084 static __init int myri10ge_init_module(void)
4085 {
4086 pr_info("Version %s\n", MYRI10GE_VERSION_STR);
4087
4088 if (myri10ge_rss_hash > MXGEFW_RSS_HASH_TYPE_MAX) {
4089 pr_err("Illegal rssh hash type %d, defaulting to source port\n",
4090 myri10ge_rss_hash);
4091 myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT;
4092 }
4093 #ifdef CONFIG_MYRI10GE_DCA
4094 dca_register_notify(&myri10ge_dca_notifier);
4095 #endif
4096 if (myri10ge_max_slices > MYRI10GE_MAX_SLICES)
4097 myri10ge_max_slices = MYRI10GE_MAX_SLICES;
4098
4099 return pci_register_driver(&myri10ge_driver);
4100 }
4101
4102 module_init(myri10ge_init_module);
4103
4104 static __exit void myri10ge_cleanup_module(void)
4105 {
4106 #ifdef CONFIG_MYRI10GE_DCA
4107 dca_unregister_notify(&myri10ge_dca_notifier);
4108 #endif
4109 pci_unregister_driver(&myri10ge_driver);
4110 }
4111
4112 module_exit(myri10ge_cleanup_module);
ubuntu-bionic-kernel mirror