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