Merge branch 'kvm-amd-pmu-fixes' into HEAD
[linux-2.6-microblaze.git] / drivers / net / ethernet / myricom / myri10ge / myri10ge.c
1 /*************************************************************************
2  * myri10ge.c: Myricom Myri-10G Ethernet driver.
3  *
4  * Copyright (C) 2005 - 2011 Myricom, Inc.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. Neither the name of Myricom, Inc. nor the names of its contributors
16  *    may be used to endorse or promote products derived from this software
17  *    without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
23  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29  * POSSIBILITY OF SUCH DAMAGE.
30  *
31  *
32  * If the eeprom on your board is not recent enough, you will need to get a
33  * newer firmware image at:
34  *   http://www.myri.com/scs/download-Myri10GE.html
35  *
36  * Contact Information:
37  *   <help@myri.com>
38  *   Myricom, Inc., 325N Santa Anita Avenue, Arcadia, CA 91006
39  *************************************************************************/
40
41 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
42
43 #include <linux/tcp.h>
44 #include <linux/netdevice.h>
45 #include <linux/skbuff.h>
46 #include <linux/string.h>
47 #include <linux/module.h>
48 #include <linux/pci.h>
49 #include <linux/dma-mapping.h>
50 #include <linux/etherdevice.h>
51 #include <linux/if_ether.h>
52 #include <linux/if_vlan.h>
53 #include <linux/dca.h>
54 #include <linux/ip.h>
55 #include <linux/inet.h>
56 #include <linux/in.h>
57 #include <linux/ethtool.h>
58 #include <linux/firmware.h>
59 #include <linux/delay.h>
60 #include <linux/timer.h>
61 #include <linux/vmalloc.h>
62 #include <linux/crc32.h>
63 #include <linux/moduleparam.h>
64 #include <linux/io.h>
65 #include <linux/log2.h>
66 #include <linux/slab.h>
67 #include <linux/prefetch.h>
68 #include <net/checksum.h>
69 #include <net/ip.h>
70 #include <net/tcp.h>
71 #include <asm/byteorder.h>
72 #include <asm/processor.h>
73
74 #include "myri10ge_mcp.h"
75 #include "myri10ge_mcp_gen_header.h"
76
77 #define MYRI10GE_VERSION_STR "1.5.3-1.534"
78
79 MODULE_DESCRIPTION("Myricom 10G driver (10GbE)");
80 MODULE_AUTHOR("Maintainer: help@myri.com");
81 MODULE_VERSION(MYRI10GE_VERSION_STR);
82 MODULE_LICENSE("Dual BSD/GPL");
83
84 #define MYRI10GE_MAX_ETHER_MTU 9014
85
86 #define MYRI10GE_ETH_STOPPED 0
87 #define MYRI10GE_ETH_STOPPING 1
88 #define MYRI10GE_ETH_STARTING 2
89 #define MYRI10GE_ETH_RUNNING 3
90 #define MYRI10GE_ETH_OPEN_FAILED 4
91
92 #define MYRI10GE_EEPROM_STRINGS_SIZE 256
93 #define MYRI10GE_MAX_SEND_DESC_TSO ((65536 / 2048) * 2)
94
95 #define MYRI10GE_NO_CONFIRM_DATA htonl(0xffffffff)
96 #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff
97
98 #define MYRI10GE_ALLOC_ORDER 0
99 #define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE)
100 #define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1)
101
102 #define MYRI10GE_MAX_SLICES 32
103
104 struct myri10ge_rx_buffer_state {
105         struct page *page;
106         int page_offset;
107         DEFINE_DMA_UNMAP_ADDR(bus);
108         DEFINE_DMA_UNMAP_LEN(len);
109 };
110
111 struct myri10ge_tx_buffer_state {
112         struct sk_buff *skb;
113         int last;
114         DEFINE_DMA_UNMAP_ADDR(bus);
115         DEFINE_DMA_UNMAP_LEN(len);
116 };
117
118 struct myri10ge_cmd {
119         u32 data0;
120         u32 data1;
121         u32 data2;
122 };
123
124 struct myri10ge_rx_buf {
125         struct mcp_kreq_ether_recv __iomem *lanai;      /* lanai ptr for recv ring */
126         struct mcp_kreq_ether_recv *shadow;     /* host shadow of recv ring */
127         struct myri10ge_rx_buffer_state *info;
128         struct page *page;
129         dma_addr_t bus;
130         int page_offset;
131         int cnt;
132         int fill_cnt;
133         int alloc_fail;
134         int mask;               /* number of rx slots -1 */
135         int watchdog_needed;
136 };
137
138 struct myri10ge_tx_buf {
139         struct mcp_kreq_ether_send __iomem *lanai;      /* lanai ptr for sendq */
140         __be32 __iomem *send_go;        /* "go" doorbell ptr */
141         __be32 __iomem *send_stop;      /* "stop" doorbell ptr */
142         struct mcp_kreq_ether_send *req_list;   /* host shadow of sendq */
143         char *req_bytes;
144         struct myri10ge_tx_buffer_state *info;
145         int mask;               /* number of transmit slots -1  */
146         int req ____cacheline_aligned;  /* transmit slots submitted     */
147         int pkt_start;          /* packets started */
148         int stop_queue;
149         int linearized;
150         int done ____cacheline_aligned; /* transmit slots completed     */
151         int pkt_done;           /* packets completed */
152         int wake_queue;
153         int queue_active;
154 };
155
156 struct myri10ge_rx_done {
157         struct mcp_slot *entry;
158         dma_addr_t bus;
159         int cnt;
160         int idx;
161 };
162
163 struct myri10ge_slice_netstats {
164         unsigned long rx_packets;
165         unsigned long tx_packets;
166         unsigned long rx_bytes;
167         unsigned long tx_bytes;
168         unsigned long rx_dropped;
169         unsigned long tx_dropped;
170 };
171
172 struct myri10ge_slice_state {
173         struct myri10ge_tx_buf tx;      /* transmit ring        */
174         struct myri10ge_rx_buf rx_small;
175         struct myri10ge_rx_buf rx_big;
176         struct myri10ge_rx_done rx_done;
177         struct net_device *dev;
178         struct napi_struct napi;
179         struct myri10ge_priv *mgp;
180         struct myri10ge_slice_netstats stats;
181         __be32 __iomem *irq_claim;
182         struct mcp_irq_data *fw_stats;
183         dma_addr_t fw_stats_bus;
184         int watchdog_tx_done;
185         int watchdog_tx_req;
186         int watchdog_rx_done;
187         int stuck;
188 #ifdef CONFIG_MYRI10GE_DCA
189         int cached_dca_tag;
190         int cpu;
191         __be32 __iomem *dca_tag;
192 #endif
193         char irq_desc[32];
194 };
195
196 struct myri10ge_priv {
197         struct myri10ge_slice_state *ss;
198         int tx_boundary;        /* boundary transmits cannot cross */
199         int num_slices;
200         int running;            /* running?             */
201         int small_bytes;
202         int big_bytes;
203         int max_intr_slots;
204         struct net_device *dev;
205         u8 __iomem *sram;
206         int sram_size;
207         unsigned long board_span;
208         unsigned long iomem_base;
209         __be32 __iomem *irq_deassert;
210         char *mac_addr_string;
211         struct mcp_cmd_response *cmd;
212         dma_addr_t cmd_bus;
213         struct pci_dev *pdev;
214         int msi_enabled;
215         int msix_enabled;
216         struct msix_entry *msix_vectors;
217 #ifdef CONFIG_MYRI10GE_DCA
218         int dca_enabled;
219         int relaxed_order;
220 #endif
221         u32 link_state;
222         unsigned int rdma_tags_available;
223         int intr_coal_delay;
224         __be32 __iomem *intr_coal_delay_ptr;
225         int wc_cookie;
226         int down_cnt;
227         wait_queue_head_t down_wq;
228         struct work_struct watchdog_work;
229         struct timer_list watchdog_timer;
230         int watchdog_resets;
231         int watchdog_pause;
232         int pause;
233         bool fw_name_allocated;
234         char *fw_name;
235         char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
236         char *product_code_string;
237         char fw_version[128];
238         int fw_ver_major;
239         int fw_ver_minor;
240         int fw_ver_tiny;
241         int adopted_rx_filter_bug;
242         u8 mac_addr[ETH_ALEN];          /* eeprom mac address */
243         unsigned long serial_number;
244         int vendor_specific_offset;
245         int fw_multicast_support;
246         u32 features;
247         u32 max_tso6;
248         u32 read_dma;
249         u32 write_dma;
250         u32 read_write_dma;
251         u32 link_changes;
252         u32 msg_enable;
253         unsigned int board_number;
254         int rebooted;
255 };
256
257 static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
258 static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
259 static char *myri10ge_fw_rss_unaligned = "myri10ge_rss_ethp_z8e.dat";
260 static char *myri10ge_fw_rss_aligned = "myri10ge_rss_eth_z8e.dat";
261 MODULE_FIRMWARE("myri10ge_ethp_z8e.dat");
262 MODULE_FIRMWARE("myri10ge_eth_z8e.dat");
263 MODULE_FIRMWARE("myri10ge_rss_ethp_z8e.dat");
264 MODULE_FIRMWARE("myri10ge_rss_eth_z8e.dat");
265
266 /* Careful: must be accessed under kernel_param_lock() */
267 static char *myri10ge_fw_name = NULL;
268 module_param(myri10ge_fw_name, charp, 0644);
269 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name");
270
271 #define MYRI10GE_MAX_BOARDS 8
272 static char *myri10ge_fw_names[MYRI10GE_MAX_BOARDS] =
273     {[0 ... (MYRI10GE_MAX_BOARDS - 1)] = NULL };
274 module_param_array_named(myri10ge_fw_names, myri10ge_fw_names, charp, NULL,
275                          0444);
276 MODULE_PARM_DESC(myri10ge_fw_names, "Firmware image names per board");
277
278 static int myri10ge_ecrc_enable = 1;
279 module_param(myri10ge_ecrc_enable, int, 0444);
280 MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E");
281
282 static int myri10ge_small_bytes = -1;   /* -1 == auto */
283 module_param(myri10ge_small_bytes, int, 0644);
284 MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets");
285
286 static int myri10ge_msi = 1;    /* enable msi by default */
287 module_param(myri10ge_msi, int, 0644);
288 MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts");
289
290 static int myri10ge_intr_coal_delay = 75;
291 module_param(myri10ge_intr_coal_delay, int, 0444);
292 MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay");
293
294 static int myri10ge_flow_control = 1;
295 module_param(myri10ge_flow_control, int, 0444);
296 MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter");
297
298 static int myri10ge_deassert_wait = 1;
299 module_param(myri10ge_deassert_wait, int, 0644);
300 MODULE_PARM_DESC(myri10ge_deassert_wait,
301                  "Wait when deasserting legacy interrupts");
302
303 static int myri10ge_force_firmware = 0;
304 module_param(myri10ge_force_firmware, int, 0444);
305 MODULE_PARM_DESC(myri10ge_force_firmware,
306                  "Force firmware to assume aligned completions");
307
308 static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
309 module_param(myri10ge_initial_mtu, int, 0444);
310 MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU");
311
312 static int myri10ge_napi_weight = 64;
313 module_param(myri10ge_napi_weight, int, 0444);
314 MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight");
315
316 static int myri10ge_watchdog_timeout = 1;
317 module_param(myri10ge_watchdog_timeout, int, 0444);
318 MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout");
319
320 static int myri10ge_max_irq_loops = 1048576;
321 module_param(myri10ge_max_irq_loops, int, 0444);
322 MODULE_PARM_DESC(myri10ge_max_irq_loops,
323                  "Set stuck legacy IRQ detection threshold");
324
325 #define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK
326
327 static int myri10ge_debug = -1; /* defaults above */
328 module_param(myri10ge_debug, int, 0);
329 MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)");
330
331 static int myri10ge_fill_thresh = 256;
332 module_param(myri10ge_fill_thresh, int, 0644);
333 MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed");
334
335 static int myri10ge_reset_recover = 1;
336
337 static int myri10ge_max_slices = 1;
338 module_param(myri10ge_max_slices, int, 0444);
339 MODULE_PARM_DESC(myri10ge_max_slices, "Max tx/rx queues");
340
341 static int myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_DST_PORT;
342 module_param(myri10ge_rss_hash, int, 0444);
343 MODULE_PARM_DESC(myri10ge_rss_hash, "Type of RSS hashing to do");
344
345 static int myri10ge_dca = 1;
346 module_param(myri10ge_dca, int, 0444);
347 MODULE_PARM_DESC(myri10ge_dca, "Enable DCA if possible");
348
349 #define MYRI10GE_FW_OFFSET 1024*1024
350 #define MYRI10GE_HIGHPART_TO_U32(X) \
351 (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0)
352 #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X))
353
354 #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8)
355
356 static void myri10ge_set_multicast_list(struct net_device *dev);
357 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
358                                          struct net_device *dev);
359
360 static inline void put_be32(__be32 val, __be32 __iomem * p)
361 {
362         __raw_writel((__force __u32) val, (__force void __iomem *)p);
363 }
364
365 static void myri10ge_get_stats(struct net_device *dev,
366                                struct rtnl_link_stats64 *stats);
367
368 static void set_fw_name(struct myri10ge_priv *mgp, char *name, bool allocated)
369 {
370         if (mgp->fw_name_allocated)
371                 kfree(mgp->fw_name);
372         mgp->fw_name = name;
373         mgp->fw_name_allocated = allocated;
374 }
375
376 static int
377 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
378                   struct myri10ge_cmd *data, int atomic)
379 {
380         struct mcp_cmd *buf;
381         char buf_bytes[sizeof(*buf) + 8];
382         struct mcp_cmd_response *response = mgp->cmd;
383         char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD;
384         u32 dma_low, dma_high, result, value;
385         int sleep_total = 0;
386
387         /* ensure buf is aligned to 8 bytes */
388         buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8);
389
390         buf->data0 = htonl(data->data0);
391         buf->data1 = htonl(data->data1);
392         buf->data2 = htonl(data->data2);
393         buf->cmd = htonl(cmd);
394         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
395         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
396
397         buf->response_addr.low = htonl(dma_low);
398         buf->response_addr.high = htonl(dma_high);
399         response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT);
400         mb();
401         myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf));
402
403         /* wait up to 15ms. Longest command is the DMA benchmark,
404          * which is capped at 5ms, but runs from a timeout handler
405          * that runs every 7.8ms. So a 15ms timeout leaves us with
406          * a 2.2ms margin
407          */
408         if (atomic) {
409                 /* if atomic is set, do not sleep,
410                  * and try to get the completion quickly
411                  * (1ms will be enough for those commands) */
412                 for (sleep_total = 0;
413                      sleep_total < 1000 &&
414                      response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
415                      sleep_total += 10) {
416                         udelay(10);
417                         mb();
418                 }
419         } else {
420                 /* use msleep for most command */
421                 for (sleep_total = 0;
422                      sleep_total < 15 &&
423                      response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
424                      sleep_total++)
425                         msleep(1);
426         }
427
428         result = ntohl(response->result);
429         value = ntohl(response->data);
430         if (result != MYRI10GE_NO_RESPONSE_RESULT) {
431                 if (result == 0) {
432                         data->data0 = value;
433                         return 0;
434                 } else if (result == MXGEFW_CMD_UNKNOWN) {
435                         return -ENOSYS;
436                 } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) {
437                         return -E2BIG;
438                 } else if (result == MXGEFW_CMD_ERROR_RANGE &&
439                            cmd == MXGEFW_CMD_ENABLE_RSS_QUEUES &&
440                            (data->
441                             data1 & MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES) !=
442                            0) {
443                         return -ERANGE;
444                 } else {
445                         dev_err(&mgp->pdev->dev,
446                                 "command %d failed, result = %d\n",
447                                 cmd, result);
448                         return -ENXIO;
449                 }
450         }
451
452         dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
453                 cmd, result);
454         return -EAGAIN;
455 }
456
457 /*
458  * The eeprom strings on the lanaiX have the format
459  * SN=x\0
460  * MAC=x:x:x:x:x:x\0
461  * PT:ddd mmm xx xx:xx:xx xx\0
462  * PV:ddd mmm xx xx:xx:xx xx\0
463  */
464 static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp)
465 {
466         char *ptr, *limit;
467         int i;
468
469         ptr = mgp->eeprom_strings;
470         limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE;
471
472         while (*ptr != '\0' && ptr < limit) {
473                 if (memcmp(ptr, "MAC=", 4) == 0) {
474                         ptr += 4;
475                         mgp->mac_addr_string = ptr;
476                         for (i = 0; i < 6; i++) {
477                                 if ((ptr + 2) > limit)
478                                         goto abort;
479                                 mgp->mac_addr[i] =
480                                     simple_strtoul(ptr, &ptr, 16);
481                                 ptr += 1;
482                         }
483                 }
484                 if (memcmp(ptr, "PC=", 3) == 0) {
485                         ptr += 3;
486                         mgp->product_code_string = ptr;
487                 }
488                 if (memcmp((const void *)ptr, "SN=", 3) == 0) {
489                         ptr += 3;
490                         mgp->serial_number = simple_strtoul(ptr, &ptr, 10);
491                 }
492                 while (ptr < limit && *ptr++) ;
493         }
494
495         return 0;
496
497 abort:
498         dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n");
499         return -ENXIO;
500 }
501
502 /*
503  * Enable or disable periodic RDMAs from the host to make certain
504  * chipsets resend dropped PCIe messages
505  */
506
507 static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable)
508 {
509         char __iomem *submit;
510         __be32 buf[16] __attribute__ ((__aligned__(8)));
511         u32 dma_low, dma_high;
512         int i;
513
514         /* clear confirmation addr */
515         mgp->cmd->data = 0;
516         mb();
517
518         /* send a rdma command to the PCIe engine, and wait for the
519          * response in the confirmation address.  The firmware should
520          * write a -1 there to indicate it is alive and well
521          */
522         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
523         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
524
525         buf[0] = htonl(dma_high);       /* confirm addr MSW */
526         buf[1] = htonl(dma_low);        /* confirm addr LSW */
527         buf[2] = MYRI10GE_NO_CONFIRM_DATA;      /* confirm data */
528         buf[3] = htonl(dma_high);       /* dummy addr MSW */
529         buf[4] = htonl(dma_low);        /* dummy addr LSW */
530         buf[5] = htonl(enable); /* enable? */
531
532         submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA;
533
534         myri10ge_pio_copy(submit, &buf, sizeof(buf));
535         for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++)
536                 msleep(1);
537         if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA)
538                 dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n",
539                         (enable ? "enable" : "disable"));
540 }
541
542 static int
543 myri10ge_validate_firmware(struct myri10ge_priv *mgp,
544                            struct mcp_gen_header *hdr)
545 {
546         struct device *dev = &mgp->pdev->dev;
547
548         /* check firmware type */
549         if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) {
550                 dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type));
551                 return -EINVAL;
552         }
553
554         /* save firmware version for ethtool */
555         strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
556         mgp->fw_version[sizeof(mgp->fw_version) - 1] = '\0';
557
558         sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major,
559                &mgp->fw_ver_minor, &mgp->fw_ver_tiny);
560
561         if (!(mgp->fw_ver_major == MXGEFW_VERSION_MAJOR &&
562               mgp->fw_ver_minor == MXGEFW_VERSION_MINOR)) {
563                 dev_err(dev, "Found firmware version %s\n", mgp->fw_version);
564                 dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR,
565                         MXGEFW_VERSION_MINOR);
566                 return -EINVAL;
567         }
568         return 0;
569 }
570
571 static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
572 {
573         unsigned crc, reread_crc;
574         const struct firmware *fw;
575         struct device *dev = &mgp->pdev->dev;
576         unsigned char *fw_readback;
577         struct mcp_gen_header *hdr;
578         size_t hdr_offset;
579         int status;
580         unsigned i;
581
582         if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) {
583                 dev_err(dev, "Unable to load %s firmware image via hotplug\n",
584                         mgp->fw_name);
585                 status = -EINVAL;
586                 goto abort_with_nothing;
587         }
588
589         /* check size */
590
591         if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET ||
592             fw->size < MCP_HEADER_PTR_OFFSET + 4) {
593                 dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size);
594                 status = -EINVAL;
595                 goto abort_with_fw;
596         }
597
598         /* check id */
599         hdr_offset = ntohl(*(__be32 *) (fw->data + MCP_HEADER_PTR_OFFSET));
600         if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) {
601                 dev_err(dev, "Bad firmware file\n");
602                 status = -EINVAL;
603                 goto abort_with_fw;
604         }
605         hdr = (void *)(fw->data + hdr_offset);
606
607         status = myri10ge_validate_firmware(mgp, hdr);
608         if (status != 0)
609                 goto abort_with_fw;
610
611         crc = crc32(~0, fw->data, fw->size);
612         for (i = 0; i < fw->size; i += 256) {
613                 myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i,
614                                   fw->data + i,
615                                   min(256U, (unsigned)(fw->size - i)));
616                 mb();
617                 readb(mgp->sram);
618         }
619         fw_readback = vmalloc(fw->size);
620         if (!fw_readback) {
621                 status = -ENOMEM;
622                 goto abort_with_fw;
623         }
624         /* corruption checking is good for parity recovery and buggy chipset */
625         memcpy_fromio(fw_readback, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);
626         reread_crc = crc32(~0, fw_readback, fw->size);
627         vfree(fw_readback);
628         if (crc != reread_crc) {
629                 dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n",
630                         (unsigned)fw->size, reread_crc, crc);
631                 status = -EIO;
632                 goto abort_with_fw;
633         }
634         *size = (u32) fw->size;
635
636 abort_with_fw:
637         release_firmware(fw);
638
639 abort_with_nothing:
640         return status;
641 }
642
643 static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp)
644 {
645         struct mcp_gen_header *hdr;
646         struct device *dev = &mgp->pdev->dev;
647         const size_t bytes = sizeof(struct mcp_gen_header);
648         size_t hdr_offset;
649         int status;
650
651         /* find running firmware header */
652         hdr_offset = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
653
654         if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) {
655                 dev_err(dev, "Running firmware has bad header offset (%d)\n",
656                         (int)hdr_offset);
657                 return -EIO;
658         }
659
660         /* copy header of running firmware from SRAM to host memory to
661          * validate firmware */
662         hdr = kmalloc(bytes, GFP_KERNEL);
663         if (hdr == NULL)
664                 return -ENOMEM;
665
666         memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes);
667         status = myri10ge_validate_firmware(mgp, hdr);
668         kfree(hdr);
669
670         /* check to see if adopted firmware has bug where adopting
671          * it will cause broadcasts to be filtered unless the NIC
672          * is kept in ALLMULTI mode */
673         if (mgp->fw_ver_major == 1 && mgp->fw_ver_minor == 4 &&
674             mgp->fw_ver_tiny >= 4 && mgp->fw_ver_tiny <= 11) {
675                 mgp->adopted_rx_filter_bug = 1;
676                 dev_warn(dev, "Adopting fw %d.%d.%d: "
677                          "working around rx filter bug\n",
678                          mgp->fw_ver_major, mgp->fw_ver_minor,
679                          mgp->fw_ver_tiny);
680         }
681         return status;
682 }
683
684 static int myri10ge_get_firmware_capabilities(struct myri10ge_priv *mgp)
685 {
686         struct myri10ge_cmd cmd;
687         int status;
688
689         /* probe for IPv6 TSO support */
690         mgp->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
691         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_TSO6_HDR_SIZE,
692                                    &cmd, 0);
693         if (status == 0) {
694                 mgp->max_tso6 = cmd.data0;
695                 mgp->features |= NETIF_F_TSO6;
696         }
697
698         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
699         if (status != 0) {
700                 dev_err(&mgp->pdev->dev,
701                         "failed MXGEFW_CMD_GET_RX_RING_SIZE\n");
702                 return -ENXIO;
703         }
704
705         mgp->max_intr_slots = 2 * (cmd.data0 / sizeof(struct mcp_dma_addr));
706
707         return 0;
708 }
709
710 static int myri10ge_load_firmware(struct myri10ge_priv *mgp, int adopt)
711 {
712         char __iomem *submit;
713         __be32 buf[16] __attribute__ ((__aligned__(8)));
714         u32 dma_low, dma_high, size;
715         int status, i;
716
717         size = 0;
718         status = myri10ge_load_hotplug_firmware(mgp, &size);
719         if (status) {
720                 if (!adopt)
721                         return status;
722                 dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n");
723
724                 /* Do not attempt to adopt firmware if there
725                  * was a bad crc */
726                 if (status == -EIO)
727                         return status;
728
729                 status = myri10ge_adopt_running_firmware(mgp);
730                 if (status != 0) {
731                         dev_err(&mgp->pdev->dev,
732                                 "failed to adopt running firmware\n");
733                         return status;
734                 }
735                 dev_info(&mgp->pdev->dev,
736                          "Successfully adopted running firmware\n");
737                 if (mgp->tx_boundary == 4096) {
738                         dev_warn(&mgp->pdev->dev,
739                                  "Using firmware currently running on NIC"
740                                  ".  For optimal\n");
741                         dev_warn(&mgp->pdev->dev,
742                                  "performance consider loading optimized "
743                                  "firmware\n");
744                         dev_warn(&mgp->pdev->dev, "via hotplug\n");
745                 }
746
747                 set_fw_name(mgp, "adopted", false);
748                 mgp->tx_boundary = 2048;
749                 myri10ge_dummy_rdma(mgp, 1);
750                 status = myri10ge_get_firmware_capabilities(mgp);
751                 return status;
752         }
753
754         /* clear confirmation addr */
755         mgp->cmd->data = 0;
756         mb();
757
758         /* send a reload command to the bootstrap MCP, and wait for the
759          *  response in the confirmation address.  The firmware should
760          * write a -1 there to indicate it is alive and well
761          */
762         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
763         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
764
765         buf[0] = htonl(dma_high);       /* confirm addr MSW */
766         buf[1] = htonl(dma_low);        /* confirm addr LSW */
767         buf[2] = MYRI10GE_NO_CONFIRM_DATA;      /* confirm data */
768
769         /* FIX: All newest firmware should un-protect the bottom of
770          * the sram before handoff. However, the very first interfaces
771          * do not. Therefore the handoff copy must skip the first 8 bytes
772          */
773         buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */
774         buf[4] = htonl(size - 8);       /* length of code */
775         buf[5] = htonl(8);      /* where to copy to */
776         buf[6] = htonl(0);      /* where to jump to */
777
778         submit = mgp->sram + MXGEFW_BOOT_HANDOFF;
779
780         myri10ge_pio_copy(submit, &buf, sizeof(buf));
781         mb();
782         msleep(1);
783         mb();
784         i = 0;
785         while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 9) {
786                 msleep(1 << i);
787                 i++;
788         }
789         if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) {
790                 dev_err(&mgp->pdev->dev, "handoff failed\n");
791                 return -ENXIO;
792         }
793         myri10ge_dummy_rdma(mgp, 1);
794         status = myri10ge_get_firmware_capabilities(mgp);
795
796         return status;
797 }
798
799 static int myri10ge_update_mac_address(struct myri10ge_priv *mgp,
800                                        const u8 * addr)
801 {
802         struct myri10ge_cmd cmd;
803         int status;
804
805         cmd.data0 = ((addr[0] << 24) | (addr[1] << 16)
806                      | (addr[2] << 8) | addr[3]);
807
808         cmd.data1 = ((addr[4] << 8) | (addr[5]));
809
810         status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0);
811         return status;
812 }
813
814 static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause)
815 {
816         struct myri10ge_cmd cmd;
817         int status, ctl;
818
819         ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL;
820         status = myri10ge_send_cmd(mgp, ctl, &cmd, 0);
821
822         if (status) {
823                 netdev_err(mgp->dev, "Failed to set flow control mode\n");
824                 return status;
825         }
826         mgp->pause = pause;
827         return 0;
828 }
829
830 static void
831 myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic)
832 {
833         struct myri10ge_cmd cmd;
834         int status, ctl;
835
836         ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC;
837         status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic);
838         if (status)
839                 netdev_err(mgp->dev, "Failed to set promisc mode\n");
840 }
841
842 static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type)
843 {
844         struct myri10ge_cmd cmd;
845         int status;
846         u32 len;
847         struct page *dmatest_page;
848         dma_addr_t dmatest_bus;
849         char *test = " ";
850
851         dmatest_page = alloc_page(GFP_KERNEL);
852         if (!dmatest_page)
853                 return -ENOMEM;
854         dmatest_bus = dma_map_page(&mgp->pdev->dev, dmatest_page, 0,
855                                    PAGE_SIZE, DMA_BIDIRECTIONAL);
856         if (unlikely(dma_mapping_error(&mgp->pdev->dev, dmatest_bus))) {
857                 __free_page(dmatest_page);
858                 return -ENOMEM;
859         }
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         dma_unmap_page(&mgp->pdev->dev, dmatest_bus, PAGE_SIZE,
904                        DMA_BIDIRECTIONAL);
905         put_page(dmatest_page);
906
907         if (status != 0 && test_type != MXGEFW_CMD_UNALIGNED_TEST)
908                 dev_warn(&mgp->pdev->dev, "DMA %s benchmark failed: %d\n",
909                          test, status);
910
911         return status;
912 }
913
914 static int myri10ge_reset(struct myri10ge_priv *mgp)
915 {
916         struct myri10ge_cmd cmd;
917         struct myri10ge_slice_state *ss;
918         int i, status;
919         size_t bytes;
920 #ifdef CONFIG_MYRI10GE_DCA
921         unsigned long dca_tag_off;
922 #endif
923
924         /* try to send a reset command to the card to see if it
925          * is alive */
926         memset(&cmd, 0, sizeof(cmd));
927         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
928         if (status != 0) {
929                 dev_err(&mgp->pdev->dev, "failed reset\n");
930                 return -ENXIO;
931         }
932
933         (void)myri10ge_dma_test(mgp, MXGEFW_DMA_TEST);
934         /*
935          * Use non-ndis mcp_slot (eg, 4 bytes total,
936          * no toeplitz hash value returned.  Older firmware will
937          * not understand this command, but will use the correct
938          * sized mcp_slot, so we ignore error returns
939          */
940         cmd.data0 = MXGEFW_RSS_MCP_SLOT_TYPE_MIN;
941         (void)myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_MCP_SLOT_TYPE, &cmd, 0);
942
943         /* Now exchange information about interrupts  */
944
945         bytes = mgp->max_intr_slots * sizeof(*mgp->ss[0].rx_done.entry);
946         cmd.data0 = (u32) bytes;
947         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
948
949         /*
950          * Even though we already know how many slices are supported
951          * via myri10ge_probe_slices() MXGEFW_CMD_GET_MAX_RSS_QUEUES
952          * has magic side effects, and must be called after a reset.
953          * It must be called prior to calling any RSS related cmds,
954          * including assigning an interrupt queue for anything but
955          * slice 0.  It must also be called *after*
956          * MXGEFW_CMD_SET_INTRQ_SIZE, since the intrq size is used by
957          * the firmware to compute offsets.
958          */
959
960         if (mgp->num_slices > 1) {
961
962                 /* ask the maximum number of slices it supports */
963                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES,
964                                            &cmd, 0);
965                 if (status != 0) {
966                         dev_err(&mgp->pdev->dev,
967                                 "failed to get number of slices\n");
968                 }
969
970                 /*
971                  * MXGEFW_CMD_ENABLE_RSS_QUEUES must be called prior
972                  * to setting up the interrupt queue DMA
973                  */
974
975                 cmd.data0 = mgp->num_slices;
976                 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
977                 if (mgp->dev->real_num_tx_queues > 1)
978                         cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
979                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
980                                            &cmd, 0);
981
982                 /* Firmware older than 1.4.32 only supports multiple
983                  * RX queues, so if we get an error, first retry using a
984                  * single TX queue before giving up */
985                 if (status != 0 && mgp->dev->real_num_tx_queues > 1) {
986                         netif_set_real_num_tx_queues(mgp->dev, 1);
987                         cmd.data0 = mgp->num_slices;
988                         cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
989                         status = myri10ge_send_cmd(mgp,
990                                                    MXGEFW_CMD_ENABLE_RSS_QUEUES,
991                                                    &cmd, 0);
992                 }
993
994                 if (status != 0) {
995                         dev_err(&mgp->pdev->dev,
996                                 "failed to set number of slices\n");
997
998                         return status;
999                 }
1000         }
1001         for (i = 0; i < mgp->num_slices; i++) {
1002                 ss = &mgp->ss[i];
1003                 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->rx_done.bus);
1004                 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->rx_done.bus);
1005                 cmd.data2 = i;
1006                 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA,
1007                                             &cmd, 0);
1008         }
1009
1010         status |=
1011             myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0);
1012         for (i = 0; i < mgp->num_slices; i++) {
1013                 ss = &mgp->ss[i];
1014                 ss->irq_claim =
1015                     (__iomem __be32 *) (mgp->sram + cmd.data0 + 8 * i);
1016         }
1017         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET,
1018                                     &cmd, 0);
1019         mgp->irq_deassert = (__iomem __be32 *) (mgp->sram + cmd.data0);
1020
1021         status |= myri10ge_send_cmd
1022             (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0);
1023         mgp->intr_coal_delay_ptr = (__iomem __be32 *) (mgp->sram + cmd.data0);
1024         if (status != 0) {
1025                 dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n");
1026                 return status;
1027         }
1028         put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1029
1030 #ifdef CONFIG_MYRI10GE_DCA
1031         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_DCA_OFFSET, &cmd, 0);
1032         dca_tag_off = cmd.data0;
1033         for (i = 0; i < mgp->num_slices; i++) {
1034                 ss = &mgp->ss[i];
1035                 if (status == 0) {
1036                         ss->dca_tag = (__iomem __be32 *)
1037                             (mgp->sram + dca_tag_off + 4 * i);
1038                 } else {
1039                         ss->dca_tag = NULL;
1040                 }
1041         }
1042 #endif                          /* CONFIG_MYRI10GE_DCA */
1043
1044         /* reset mcp/driver shared state back to 0 */
1045
1046         mgp->link_changes = 0;
1047         for (i = 0; i < mgp->num_slices; i++) {
1048                 ss = &mgp->ss[i];
1049
1050                 memset(ss->rx_done.entry, 0, bytes);
1051                 ss->tx.req = 0;
1052                 ss->tx.done = 0;
1053                 ss->tx.pkt_start = 0;
1054                 ss->tx.pkt_done = 0;
1055                 ss->rx_big.cnt = 0;
1056                 ss->rx_small.cnt = 0;
1057                 ss->rx_done.idx = 0;
1058                 ss->rx_done.cnt = 0;
1059                 ss->tx.wake_queue = 0;
1060                 ss->tx.stop_queue = 0;
1061         }
1062
1063         status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr);
1064         myri10ge_change_pause(mgp, mgp->pause);
1065         myri10ge_set_multicast_list(mgp->dev);
1066         return status;
1067 }
1068
1069 #ifdef CONFIG_MYRI10GE_DCA
1070 static int myri10ge_toggle_relaxed(struct pci_dev *pdev, int on)
1071 {
1072         int ret;
1073         u16 ctl;
1074
1075         pcie_capability_read_word(pdev, PCI_EXP_DEVCTL, &ctl);
1076
1077         ret = (ctl & PCI_EXP_DEVCTL_RELAX_EN) >> 4;
1078         if (ret != on) {
1079                 ctl &= ~PCI_EXP_DEVCTL_RELAX_EN;
1080                 ctl |= (on << 4);
1081                 pcie_capability_write_word(pdev, PCI_EXP_DEVCTL, ctl);
1082         }
1083         return ret;
1084 }
1085
1086 static void
1087 myri10ge_write_dca(struct myri10ge_slice_state *ss, int cpu, int tag)
1088 {
1089         ss->cached_dca_tag = tag;
1090         put_be32(htonl(tag), ss->dca_tag);
1091 }
1092
1093 static inline void myri10ge_update_dca(struct myri10ge_slice_state *ss)
1094 {
1095         int cpu = get_cpu();
1096         int tag;
1097
1098         if (cpu != ss->cpu) {
1099                 tag = dca3_get_tag(&ss->mgp->pdev->dev, cpu);
1100                 if (ss->cached_dca_tag != tag)
1101                         myri10ge_write_dca(ss, cpu, tag);
1102                 ss->cpu = cpu;
1103         }
1104         put_cpu();
1105 }
1106
1107 static void myri10ge_setup_dca(struct myri10ge_priv *mgp)
1108 {
1109         int err, i;
1110         struct pci_dev *pdev = mgp->pdev;
1111
1112         if (mgp->ss[0].dca_tag == NULL || mgp->dca_enabled)
1113                 return;
1114         if (!myri10ge_dca) {
1115                 dev_err(&pdev->dev, "dca disabled by administrator\n");
1116                 return;
1117         }
1118         err = dca_add_requester(&pdev->dev);
1119         if (err) {
1120                 if (err != -ENODEV)
1121                         dev_err(&pdev->dev,
1122                                 "dca_add_requester() failed, err=%d\n", err);
1123                 return;
1124         }
1125         mgp->relaxed_order = myri10ge_toggle_relaxed(pdev, 0);
1126         mgp->dca_enabled = 1;
1127         for (i = 0; i < mgp->num_slices; i++) {
1128                 mgp->ss[i].cpu = -1;
1129                 mgp->ss[i].cached_dca_tag = -1;
1130                 myri10ge_update_dca(&mgp->ss[i]);
1131         }
1132 }
1133
1134 static void myri10ge_teardown_dca(struct myri10ge_priv *mgp)
1135 {
1136         struct pci_dev *pdev = mgp->pdev;
1137
1138         if (!mgp->dca_enabled)
1139                 return;
1140         mgp->dca_enabled = 0;
1141         if (mgp->relaxed_order)
1142                 myri10ge_toggle_relaxed(pdev, 1);
1143         dca_remove_requester(&pdev->dev);
1144 }
1145
1146 static int myri10ge_notify_dca_device(struct device *dev, void *data)
1147 {
1148         struct myri10ge_priv *mgp;
1149         unsigned long event;
1150
1151         mgp = dev_get_drvdata(dev);
1152         event = *(unsigned long *)data;
1153
1154         if (event == DCA_PROVIDER_ADD)
1155                 myri10ge_setup_dca(mgp);
1156         else if (event == DCA_PROVIDER_REMOVE)
1157                 myri10ge_teardown_dca(mgp);
1158         return 0;
1159 }
1160 #endif                          /* CONFIG_MYRI10GE_DCA */
1161
1162 static inline void
1163 myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst,
1164                     struct mcp_kreq_ether_recv *src)
1165 {
1166         __be32 low;
1167
1168         low = src->addr_low;
1169         src->addr_low = htonl(DMA_BIT_MASK(32));
1170         myri10ge_pio_copy(dst, src, 4 * sizeof(*src));
1171         mb();
1172         myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src));
1173         mb();
1174         src->addr_low = low;
1175         put_be32(low, &dst->addr_low);
1176         mb();
1177 }
1178
1179 static void
1180 myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
1181                         int bytes, int watchdog)
1182 {
1183         struct page *page;
1184         dma_addr_t bus;
1185         int idx;
1186 #if MYRI10GE_ALLOC_SIZE > 4096
1187         int end_offset;
1188 #endif
1189
1190         if (unlikely(rx->watchdog_needed && !watchdog))
1191                 return;
1192
1193         /* try to refill entire ring */
1194         while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) {
1195                 idx = rx->fill_cnt & rx->mask;
1196                 if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) {
1197                         /* we can use part of previous page */
1198                         get_page(rx->page);
1199                 } else {
1200                         /* we need a new page */
1201                         page =
1202                             alloc_pages(GFP_ATOMIC | __GFP_COMP,
1203                                         MYRI10GE_ALLOC_ORDER);
1204                         if (unlikely(page == NULL)) {
1205                                 if (rx->fill_cnt - rx->cnt < 16)
1206                                         rx->watchdog_needed = 1;
1207                                 return;
1208                         }
1209
1210                         bus = dma_map_page(&mgp->pdev->dev, page, 0,
1211                                            MYRI10GE_ALLOC_SIZE,
1212                                            DMA_FROM_DEVICE);
1213                         if (unlikely(dma_mapping_error(&mgp->pdev->dev, bus))) {
1214                                 __free_pages(page, MYRI10GE_ALLOC_ORDER);
1215                                 if (rx->fill_cnt - rx->cnt < 16)
1216                                         rx->watchdog_needed = 1;
1217                                 return;
1218                         }
1219
1220                         rx->page = page;
1221                         rx->page_offset = 0;
1222                         rx->bus = bus;
1223
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                 dma_unmap_page(&pdev->dev, (dma_unmap_addr(info, bus)
1262                                             & ~(MYRI10GE_ALLOC_SIZE - 1)),
1263                                MYRI10GE_ALLOC_SIZE, DMA_FROM_DEVICE);
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         skb_frag_t *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_CTAG_RX) ==
1286             NETIF_F_HW_VLAN_CTAG_RX &&
1287             veh->h_vlan_proto == htons(ETH_P_8021Q)) {
1288                 /* fixup csum if needed */
1289                 if (skb->ip_summed == CHECKSUM_COMPLETE) {
1290                         vsum = csum_partial(va + ETH_HLEN, VLAN_HLEN, 0);
1291                         skb->csum = csum_sub(skb->csum, vsum);
1292                 }
1293                 /* pop tag */
1294                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ntohs(veh->h_vlan_TCI));
1295                 memmove(va + VLAN_HLEN, va, 2 * ETH_ALEN);
1296                 skb->len -= VLAN_HLEN;
1297                 skb->data_len -= VLAN_HLEN;
1298                 frag = skb_shinfo(skb)->frags;
1299                 skb_frag_off_add(frag, VLAN_HLEN);
1300                 skb_frag_size_sub(frag, VLAN_HLEN);
1301         }
1302 }
1303
1304 #define MYRI10GE_HLEN 64 /* Bytes to copy from page to skb linear memory */
1305
1306 static inline int
1307 myri10ge_rx_done(struct myri10ge_slice_state *ss, int len, __wsum csum)
1308 {
1309         struct myri10ge_priv *mgp = ss->mgp;
1310         struct sk_buff *skb;
1311         skb_frag_t *rx_frags;
1312         struct myri10ge_rx_buf *rx;
1313         int i, idx, remainder, bytes;
1314         struct pci_dev *pdev = mgp->pdev;
1315         struct net_device *dev = mgp->dev;
1316         u8 *va;
1317
1318         if (len <= mgp->small_bytes) {
1319                 rx = &ss->rx_small;
1320                 bytes = mgp->small_bytes;
1321         } else {
1322                 rx = &ss->rx_big;
1323                 bytes = mgp->big_bytes;
1324         }
1325
1326         len += MXGEFW_PAD;
1327         idx = rx->cnt & rx->mask;
1328         va = page_address(rx->info[idx].page) + rx->info[idx].page_offset;
1329         prefetch(va);
1330
1331         skb = napi_get_frags(&ss->napi);
1332         if (unlikely(skb == NULL)) {
1333                 ss->stats.rx_dropped++;
1334                 for (i = 0, remainder = len; remainder > 0; i++) {
1335                         myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1336                         put_page(rx->info[idx].page);
1337                         rx->cnt++;
1338                         idx = rx->cnt & rx->mask;
1339                         remainder -= MYRI10GE_ALLOC_SIZE;
1340                 }
1341                 return 0;
1342         }
1343         rx_frags = skb_shinfo(skb)->frags;
1344         /* Fill skb_frag_t(s) with data from our receive */
1345         for (i = 0, remainder = len; remainder > 0; i++) {
1346                 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1347                 skb_fill_page_desc(skb, i, rx->info[idx].page,
1348                                    rx->info[idx].page_offset,
1349                                    remainder < MYRI10GE_ALLOC_SIZE ?
1350                                    remainder : MYRI10GE_ALLOC_SIZE);
1351                 rx->cnt++;
1352                 idx = rx->cnt & rx->mask;
1353                 remainder -= MYRI10GE_ALLOC_SIZE;
1354         }
1355
1356         /* remove padding */
1357         skb_frag_off_add(&rx_frags[0], MXGEFW_PAD);
1358         skb_frag_size_sub(&rx_frags[0], MXGEFW_PAD);
1359         len -= MXGEFW_PAD;
1360
1361         skb->len = len;
1362         skb->data_len = len;
1363         skb->truesize += len;
1364         if (dev->features & NETIF_F_RXCSUM) {
1365                 skb->ip_summed = CHECKSUM_COMPLETE;
1366                 skb->csum = csum;
1367         }
1368         myri10ge_vlan_rx(mgp->dev, va, skb);
1369         skb_record_rx_queue(skb, ss - &mgp->ss[0]);
1370
1371         napi_gro_frags(&ss->napi);
1372
1373         return 1;
1374 }
1375
1376 static inline void
1377 myri10ge_tx_done(struct myri10ge_slice_state *ss, int mcp_index)
1378 {
1379         struct pci_dev *pdev = ss->mgp->pdev;
1380         struct myri10ge_tx_buf *tx = &ss->tx;
1381         struct netdev_queue *dev_queue;
1382         struct sk_buff *skb;
1383         int idx, len;
1384
1385         while (tx->pkt_done != mcp_index) {
1386                 idx = tx->done & tx->mask;
1387                 skb = tx->info[idx].skb;
1388
1389                 /* Mark as free */
1390                 tx->info[idx].skb = NULL;
1391                 if (tx->info[idx].last) {
1392                         tx->pkt_done++;
1393                         tx->info[idx].last = 0;
1394                 }
1395                 tx->done++;
1396                 len = dma_unmap_len(&tx->info[idx], len);
1397                 dma_unmap_len_set(&tx->info[idx], len, 0);
1398                 if (skb) {
1399                         ss->stats.tx_bytes += skb->len;
1400                         ss->stats.tx_packets++;
1401                         dev_consume_skb_irq(skb);
1402                         if (len)
1403                                 dma_unmap_single(&pdev->dev,
1404                                                  dma_unmap_addr(&tx->info[idx],
1405                                                                 bus), len,
1406                                                  DMA_TO_DEVICE);
1407                 } else {
1408                         if (len)
1409                                 dma_unmap_page(&pdev->dev,
1410                                                dma_unmap_addr(&tx->info[idx],
1411                                                               bus), len,
1412                                                DMA_TO_DEVICE);
1413                 }
1414         }
1415
1416         dev_queue = netdev_get_tx_queue(ss->dev, ss - ss->mgp->ss);
1417         /*
1418          * Make a minimal effort to prevent the NIC from polling an
1419          * idle tx queue.  If we can't get the lock we leave the queue
1420          * active. In this case, either a thread was about to start
1421          * using the queue anyway, or we lost a race and the NIC will
1422          * waste some of its resources polling an inactive queue for a
1423          * while.
1424          */
1425
1426         if ((ss->mgp->dev->real_num_tx_queues > 1) &&
1427             __netif_tx_trylock(dev_queue)) {
1428                 if (tx->req == tx->done) {
1429                         tx->queue_active = 0;
1430                         put_be32(htonl(1), tx->send_stop);
1431                         mb();
1432                 }
1433                 __netif_tx_unlock(dev_queue);
1434         }
1435
1436         /* start the queue if we've stopped it */
1437         if (netif_tx_queue_stopped(dev_queue) &&
1438             tx->req - tx->done < (tx->mask >> 1) &&
1439             ss->mgp->running == MYRI10GE_ETH_RUNNING) {
1440                 tx->wake_queue++;
1441                 netif_tx_wake_queue(dev_queue);
1442         }
1443 }
1444
1445 static inline int
1446 myri10ge_clean_rx_done(struct myri10ge_slice_state *ss, int budget)
1447 {
1448         struct myri10ge_rx_done *rx_done = &ss->rx_done;
1449         struct myri10ge_priv *mgp = ss->mgp;
1450         unsigned long rx_bytes = 0;
1451         unsigned long rx_packets = 0;
1452         unsigned long rx_ok;
1453         int idx = rx_done->idx;
1454         int cnt = rx_done->cnt;
1455         int work_done = 0;
1456         u16 length;
1457         __wsum checksum;
1458
1459         while (rx_done->entry[idx].length != 0 && work_done < budget) {
1460                 length = ntohs(rx_done->entry[idx].length);
1461                 rx_done->entry[idx].length = 0;
1462                 checksum = csum_unfold(rx_done->entry[idx].checksum);
1463                 rx_ok = myri10ge_rx_done(ss, length, checksum);
1464                 rx_packets += rx_ok;
1465                 rx_bytes += rx_ok * (unsigned long)length;
1466                 cnt++;
1467                 idx = cnt & (mgp->max_intr_slots - 1);
1468                 work_done++;
1469         }
1470         rx_done->idx = idx;
1471         rx_done->cnt = cnt;
1472         ss->stats.rx_packets += rx_packets;
1473         ss->stats.rx_bytes += rx_bytes;
1474
1475         /* restock receive rings if needed */
1476         if (ss->rx_small.fill_cnt - ss->rx_small.cnt < myri10ge_fill_thresh)
1477                 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
1478                                         mgp->small_bytes + MXGEFW_PAD, 0);
1479         if (ss->rx_big.fill_cnt - ss->rx_big.cnt < myri10ge_fill_thresh)
1480                 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
1481
1482         return work_done;
1483 }
1484
1485 static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
1486 {
1487         struct mcp_irq_data *stats = mgp->ss[0].fw_stats;
1488
1489         if (unlikely(stats->stats_updated)) {
1490                 unsigned link_up = ntohl(stats->link_up);
1491                 if (mgp->link_state != link_up) {
1492                         mgp->link_state = link_up;
1493
1494                         if (mgp->link_state == MXGEFW_LINK_UP) {
1495                                 netif_info(mgp, link, mgp->dev, "link up\n");
1496                                 netif_carrier_on(mgp->dev);
1497                                 mgp->link_changes++;
1498                         } else {
1499                                 netif_info(mgp, link, mgp->dev, "link %s\n",
1500                                            (link_up == MXGEFW_LINK_MYRINET ?
1501                                             "mismatch (Myrinet detected)" :
1502                                             "down"));
1503                                 netif_carrier_off(mgp->dev);
1504                                 mgp->link_changes++;
1505                         }
1506                 }
1507                 if (mgp->rdma_tags_available !=
1508                     ntohl(stats->rdma_tags_available)) {
1509                         mgp->rdma_tags_available =
1510                             ntohl(stats->rdma_tags_available);
1511                         netdev_warn(mgp->dev, "RDMA timed out! %d tags left\n",
1512                                     mgp->rdma_tags_available);
1513                 }
1514                 mgp->down_cnt += stats->link_down;
1515                 if (stats->link_down)
1516                         wake_up(&mgp->down_wq);
1517         }
1518 }
1519
1520 static int myri10ge_poll(struct napi_struct *napi, int budget)
1521 {
1522         struct myri10ge_slice_state *ss =
1523             container_of(napi, struct myri10ge_slice_state, napi);
1524         int work_done;
1525
1526 #ifdef CONFIG_MYRI10GE_DCA
1527         if (ss->mgp->dca_enabled)
1528                 myri10ge_update_dca(ss);
1529 #endif
1530         /* process as many rx events as NAPI will allow */
1531         work_done = myri10ge_clean_rx_done(ss, budget);
1532
1533         if (work_done < budget) {
1534                 napi_complete_done(napi, work_done);
1535                 put_be32(htonl(3), ss->irq_claim);
1536         }
1537         return work_done;
1538 }
1539
1540 static irqreturn_t myri10ge_intr(int irq, void *arg)
1541 {
1542         struct myri10ge_slice_state *ss = arg;
1543         struct myri10ge_priv *mgp = ss->mgp;
1544         struct mcp_irq_data *stats = ss->fw_stats;
1545         struct myri10ge_tx_buf *tx = &ss->tx;
1546         u32 send_done_count;
1547         int i;
1548
1549         /* an interrupt on a non-zero receive-only slice is implicitly
1550          * valid  since MSI-X irqs are not shared */
1551         if ((mgp->dev->real_num_tx_queues == 1) && (ss != mgp->ss)) {
1552                 napi_schedule(&ss->napi);
1553                 return IRQ_HANDLED;
1554         }
1555
1556         /* make sure it is our IRQ, and that the DMA has finished */
1557         if (unlikely(!stats->valid))
1558                 return IRQ_NONE;
1559
1560         /* low bit indicates receives are present, so schedule
1561          * napi poll handler */
1562         if (stats->valid & 1)
1563                 napi_schedule(&ss->napi);
1564
1565         if (!mgp->msi_enabled && !mgp->msix_enabled) {
1566                 put_be32(0, mgp->irq_deassert);
1567                 if (!myri10ge_deassert_wait)
1568                         stats->valid = 0;
1569                 mb();
1570         } else
1571                 stats->valid = 0;
1572
1573         /* Wait for IRQ line to go low, if using INTx */
1574         i = 0;
1575         while (1) {
1576                 i++;
1577                 /* check for transmit completes and receives */
1578                 send_done_count = ntohl(stats->send_done_count);
1579                 if (send_done_count != tx->pkt_done)
1580                         myri10ge_tx_done(ss, (int)send_done_count);
1581                 if (unlikely(i > myri10ge_max_irq_loops)) {
1582                         netdev_warn(mgp->dev, "irq stuck?\n");
1583                         stats->valid = 0;
1584                         schedule_work(&mgp->watchdog_work);
1585                 }
1586                 if (likely(stats->valid == 0))
1587                         break;
1588                 cpu_relax();
1589                 barrier();
1590         }
1591
1592         /* Only slice 0 updates stats */
1593         if (ss == mgp->ss)
1594                 myri10ge_check_statblock(mgp);
1595
1596         put_be32(htonl(3), ss->irq_claim + 1);
1597         return IRQ_HANDLED;
1598 }
1599
1600 static int
1601 myri10ge_get_link_ksettings(struct net_device *netdev,
1602                             struct ethtool_link_ksettings *cmd)
1603 {
1604         struct myri10ge_priv *mgp = netdev_priv(netdev);
1605         char *ptr;
1606         int i;
1607
1608         cmd->base.autoneg = AUTONEG_DISABLE;
1609         cmd->base.speed = SPEED_10000;
1610         cmd->base.duplex = DUPLEX_FULL;
1611
1612         /*
1613          * parse the product code to deterimine the interface type
1614          * (CX4, XFP, Quad Ribbon Fiber) by looking at the character
1615          * after the 3rd dash in the driver's cached copy of the
1616          * EEPROM's product code string.
1617          */
1618         ptr = mgp->product_code_string;
1619         if (ptr == NULL) {
1620                 netdev_err(netdev, "Missing product code\n");
1621                 return 0;
1622         }
1623         for (i = 0; i < 3; i++, ptr++) {
1624                 ptr = strchr(ptr, '-');
1625                 if (ptr == NULL) {
1626                         netdev_err(netdev, "Invalid product code %s\n",
1627                                    mgp->product_code_string);
1628                         return 0;
1629                 }
1630         }
1631         if (*ptr == '2')
1632                 ptr++;
1633         if (*ptr == 'R' || *ptr == 'Q' || *ptr == 'S') {
1634                 /* We've found either an XFP, quad ribbon fiber, or SFP+ */
1635                 cmd->base.port = PORT_FIBRE;
1636                 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
1637                 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
1638         } else {
1639                 cmd->base.port = PORT_OTHER;
1640         }
1641
1642         return 0;
1643 }
1644
1645 static void
1646 myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
1647 {
1648         struct myri10ge_priv *mgp = netdev_priv(netdev);
1649
1650         strlcpy(info->driver, "myri10ge", sizeof(info->driver));
1651         strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version));
1652         strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version));
1653         strlcpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info));
1654 }
1655
1656 static int myri10ge_get_coalesce(struct net_device *netdev,
1657                                  struct ethtool_coalesce *coal,
1658                                  struct kernel_ethtool_coalesce *kernel_coal,
1659                                  struct netlink_ext_ack *extack)
1660 {
1661         struct myri10ge_priv *mgp = netdev_priv(netdev);
1662
1663         coal->rx_coalesce_usecs = mgp->intr_coal_delay;
1664         return 0;
1665 }
1666
1667 static int myri10ge_set_coalesce(struct net_device *netdev,
1668                                  struct ethtool_coalesce *coal,
1669                                  struct kernel_ethtool_coalesce *kernel_coal,
1670                                  struct netlink_ext_ack *extack)
1671 {
1672         struct myri10ge_priv *mgp = netdev_priv(netdev);
1673
1674         mgp->intr_coal_delay = coal->rx_coalesce_usecs;
1675         put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1676         return 0;
1677 }
1678
1679 static void
1680 myri10ge_get_pauseparam(struct net_device *netdev,
1681                         struct ethtool_pauseparam *pause)
1682 {
1683         struct myri10ge_priv *mgp = netdev_priv(netdev);
1684
1685         pause->autoneg = 0;
1686         pause->rx_pause = mgp->pause;
1687         pause->tx_pause = mgp->pause;
1688 }
1689
1690 static int
1691 myri10ge_set_pauseparam(struct net_device *netdev,
1692                         struct ethtool_pauseparam *pause)
1693 {
1694         struct myri10ge_priv *mgp = netdev_priv(netdev);
1695
1696         if (pause->tx_pause != mgp->pause)
1697                 return myri10ge_change_pause(mgp, pause->tx_pause);
1698         if (pause->rx_pause != mgp->pause)
1699                 return myri10ge_change_pause(mgp, pause->rx_pause);
1700         if (pause->autoneg != 0)
1701                 return -EINVAL;
1702         return 0;
1703 }
1704
1705 static void
1706 myri10ge_get_ringparam(struct net_device *netdev,
1707                        struct ethtool_ringparam *ring,
1708                        struct kernel_ethtool_ringparam *kernel_ring,
1709                        struct netlink_ext_ack *extack)
1710 {
1711         struct myri10ge_priv *mgp = netdev_priv(netdev);
1712
1713         ring->rx_mini_max_pending = mgp->ss[0].rx_small.mask + 1;
1714         ring->rx_max_pending = mgp->ss[0].rx_big.mask + 1;
1715         ring->rx_jumbo_max_pending = 0;
1716         ring->tx_max_pending = mgp->ss[0].tx.mask + 1;
1717         ring->rx_mini_pending = ring->rx_mini_max_pending;
1718         ring->rx_pending = ring->rx_max_pending;
1719         ring->rx_jumbo_pending = ring->rx_jumbo_max_pending;
1720         ring->tx_pending = ring->tx_max_pending;
1721 }
1722
1723 static const char myri10ge_gstrings_main_stats[][ETH_GSTRING_LEN] = {
1724         "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
1725         "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
1726         "rx_length_errors", "rx_over_errors", "rx_crc_errors",
1727         "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
1728         "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
1729         "tx_heartbeat_errors", "tx_window_errors",
1730         /* device-specific stats */
1731         "tx_boundary", "irq", "MSI", "MSIX",
1732         "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
1733         "serial_number", "watchdog_resets",
1734 #ifdef CONFIG_MYRI10GE_DCA
1735         "dca_capable_firmware", "dca_device_present",
1736 #endif
1737         "link_changes", "link_up", "dropped_link_overflow",
1738         "dropped_link_error_or_filtered",
1739         "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32",
1740         "dropped_unicast_filtered", "dropped_multicast_filtered",
1741         "dropped_runt", "dropped_overrun", "dropped_no_small_buffer",
1742         "dropped_no_big_buffer"
1743 };
1744
1745 static const char myri10ge_gstrings_slice_stats[][ETH_GSTRING_LEN] = {
1746         "----------- slice ---------",
1747         "tx_pkt_start", "tx_pkt_done", "tx_req", "tx_done",
1748         "rx_small_cnt", "rx_big_cnt",
1749         "wake_queue", "stop_queue", "tx_linearized",
1750 };
1751
1752 #define MYRI10GE_NET_STATS_LEN      21
1753 #define MYRI10GE_MAIN_STATS_LEN  ARRAY_SIZE(myri10ge_gstrings_main_stats)
1754 #define MYRI10GE_SLICE_STATS_LEN  ARRAY_SIZE(myri10ge_gstrings_slice_stats)
1755
1756 static void
1757 myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
1758 {
1759         struct myri10ge_priv *mgp = netdev_priv(netdev);
1760         int i;
1761
1762         switch (stringset) {
1763         case ETH_SS_STATS:
1764                 memcpy(data, *myri10ge_gstrings_main_stats,
1765                        sizeof(myri10ge_gstrings_main_stats));
1766                 data += sizeof(myri10ge_gstrings_main_stats);
1767                 for (i = 0; i < mgp->num_slices; i++) {
1768                         memcpy(data, *myri10ge_gstrings_slice_stats,
1769                                sizeof(myri10ge_gstrings_slice_stats));
1770                         data += sizeof(myri10ge_gstrings_slice_stats);
1771                 }
1772                 break;
1773         }
1774 }
1775
1776 static int myri10ge_get_sset_count(struct net_device *netdev, int sset)
1777 {
1778         struct myri10ge_priv *mgp = netdev_priv(netdev);
1779
1780         switch (sset) {
1781         case ETH_SS_STATS:
1782                 return MYRI10GE_MAIN_STATS_LEN +
1783                     mgp->num_slices * MYRI10GE_SLICE_STATS_LEN;
1784         default:
1785                 return -EOPNOTSUPP;
1786         }
1787 }
1788
1789 static void
1790 myri10ge_get_ethtool_stats(struct net_device *netdev,
1791                            struct ethtool_stats *stats, u64 * data)
1792 {
1793         struct myri10ge_priv *mgp = netdev_priv(netdev);
1794         struct myri10ge_slice_state *ss;
1795         struct rtnl_link_stats64 link_stats;
1796         int slice;
1797         int i;
1798
1799         /* force stats update */
1800         memset(&link_stats, 0, sizeof(link_stats));
1801         (void)myri10ge_get_stats(netdev, &link_stats);
1802         for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++)
1803                 data[i] = ((u64 *)&link_stats)[i];
1804
1805         data[i++] = (unsigned int)mgp->tx_boundary;
1806         data[i++] = (unsigned int)mgp->pdev->irq;
1807         data[i++] = (unsigned int)mgp->msi_enabled;
1808         data[i++] = (unsigned int)mgp->msix_enabled;
1809         data[i++] = (unsigned int)mgp->read_dma;
1810         data[i++] = (unsigned int)mgp->write_dma;
1811         data[i++] = (unsigned int)mgp->read_write_dma;
1812         data[i++] = (unsigned int)mgp->serial_number;
1813         data[i++] = (unsigned int)mgp->watchdog_resets;
1814 #ifdef CONFIG_MYRI10GE_DCA
1815         data[i++] = (unsigned int)(mgp->ss[0].dca_tag != NULL);
1816         data[i++] = (unsigned int)(mgp->dca_enabled);
1817 #endif
1818         data[i++] = (unsigned int)mgp->link_changes;
1819
1820         /* firmware stats are useful only in the first slice */
1821         ss = &mgp->ss[0];
1822         data[i++] = (unsigned int)ntohl(ss->fw_stats->link_up);
1823         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_link_overflow);
1824         data[i++] =
1825             (unsigned int)ntohl(ss->fw_stats->dropped_link_error_or_filtered);
1826         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_pause);
1827         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_phy);
1828         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_crc32);
1829         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_unicast_filtered);
1830         data[i++] =
1831             (unsigned int)ntohl(ss->fw_stats->dropped_multicast_filtered);
1832         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_runt);
1833         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_overrun);
1834         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_small_buffer);
1835         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_big_buffer);
1836
1837         for (slice = 0; slice < mgp->num_slices; slice++) {
1838                 ss = &mgp->ss[slice];
1839                 data[i++] = slice;
1840                 data[i++] = (unsigned int)ss->tx.pkt_start;
1841                 data[i++] = (unsigned int)ss->tx.pkt_done;
1842                 data[i++] = (unsigned int)ss->tx.req;
1843                 data[i++] = (unsigned int)ss->tx.done;
1844                 data[i++] = (unsigned int)ss->rx_small.cnt;
1845                 data[i++] = (unsigned int)ss->rx_big.cnt;
1846                 data[i++] = (unsigned int)ss->tx.wake_queue;
1847                 data[i++] = (unsigned int)ss->tx.stop_queue;
1848                 data[i++] = (unsigned int)ss->tx.linearized;
1849         }
1850 }
1851
1852 static void myri10ge_set_msglevel(struct net_device *netdev, u32 value)
1853 {
1854         struct myri10ge_priv *mgp = netdev_priv(netdev);
1855         mgp->msg_enable = value;
1856 }
1857
1858 static u32 myri10ge_get_msglevel(struct net_device *netdev)
1859 {
1860         struct myri10ge_priv *mgp = netdev_priv(netdev);
1861         return mgp->msg_enable;
1862 }
1863
1864 /*
1865  * Use a low-level command to change the LED behavior. Rather than
1866  * blinking (which is the normal case), when identify is used, the
1867  * yellow LED turns solid.
1868  */
1869 static int myri10ge_led(struct myri10ge_priv *mgp, int on)
1870 {
1871         struct mcp_gen_header *hdr;
1872         struct device *dev = &mgp->pdev->dev;
1873         size_t hdr_off, pattern_off, hdr_len;
1874         u32 pattern = 0xfffffffe;
1875
1876         /* find running firmware header */
1877         hdr_off = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
1878         if ((hdr_off & 3) || hdr_off + sizeof(*hdr) > mgp->sram_size) {
1879                 dev_err(dev, "Running firmware has bad header offset (%d)\n",
1880                         (int)hdr_off);
1881                 return -EIO;
1882         }
1883         hdr_len = swab32(readl(mgp->sram + hdr_off +
1884                                offsetof(struct mcp_gen_header, header_length)));
1885         pattern_off = hdr_off + offsetof(struct mcp_gen_header, led_pattern);
1886         if (pattern_off >= (hdr_len + hdr_off)) {
1887                 dev_info(dev, "Firmware does not support LED identification\n");
1888                 return -EINVAL;
1889         }
1890         if (!on)
1891                 pattern = swab32(readl(mgp->sram + pattern_off + 4));
1892         writel(swab32(pattern), mgp->sram + pattern_off);
1893         return 0;
1894 }
1895
1896 static int
1897 myri10ge_phys_id(struct net_device *netdev, enum ethtool_phys_id_state state)
1898 {
1899         struct myri10ge_priv *mgp = netdev_priv(netdev);
1900         int rc;
1901
1902         switch (state) {
1903         case ETHTOOL_ID_ACTIVE:
1904                 rc = myri10ge_led(mgp, 1);
1905                 break;
1906
1907         case ETHTOOL_ID_INACTIVE:
1908                 rc =  myri10ge_led(mgp, 0);
1909                 break;
1910
1911         default:
1912                 rc = -EINVAL;
1913         }
1914
1915         return rc;
1916 }
1917
1918 static const struct ethtool_ops myri10ge_ethtool_ops = {
1919         .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS,
1920         .get_drvinfo = myri10ge_get_drvinfo,
1921         .get_coalesce = myri10ge_get_coalesce,
1922         .set_coalesce = myri10ge_set_coalesce,
1923         .get_pauseparam = myri10ge_get_pauseparam,
1924         .set_pauseparam = myri10ge_set_pauseparam,
1925         .get_ringparam = myri10ge_get_ringparam,
1926         .get_link = ethtool_op_get_link,
1927         .get_strings = myri10ge_get_strings,
1928         .get_sset_count = myri10ge_get_sset_count,
1929         .get_ethtool_stats = myri10ge_get_ethtool_stats,
1930         .set_msglevel = myri10ge_set_msglevel,
1931         .get_msglevel = myri10ge_get_msglevel,
1932         .set_phys_id = myri10ge_phys_id,
1933         .get_link_ksettings = myri10ge_get_link_ksettings,
1934 };
1935
1936 static int myri10ge_allocate_rings(struct myri10ge_slice_state *ss)
1937 {
1938         struct myri10ge_priv *mgp = ss->mgp;
1939         struct myri10ge_cmd cmd;
1940         struct net_device *dev = mgp->dev;
1941         int tx_ring_size, rx_ring_size;
1942         int tx_ring_entries, rx_ring_entries;
1943         int i, slice, status;
1944         size_t bytes;
1945
1946         /* get ring sizes */
1947         slice = ss - mgp->ss;
1948         cmd.data0 = slice;
1949         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0);
1950         tx_ring_size = cmd.data0;
1951         cmd.data0 = slice;
1952         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
1953         if (status != 0)
1954                 return status;
1955         rx_ring_size = cmd.data0;
1956
1957         tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send);
1958         rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr);
1959         ss->tx.mask = tx_ring_entries - 1;
1960         ss->rx_small.mask = ss->rx_big.mask = rx_ring_entries - 1;
1961
1962         status = -ENOMEM;
1963
1964         /* allocate the host shadow rings */
1965
1966         bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4)
1967             * sizeof(*ss->tx.req_list);
1968         ss->tx.req_bytes = kzalloc(bytes, GFP_KERNEL);
1969         if (ss->tx.req_bytes == NULL)
1970                 goto abort_with_nothing;
1971
1972         /* ensure req_list entries are aligned to 8 bytes */
1973         ss->tx.req_list = (struct mcp_kreq_ether_send *)
1974             ALIGN((unsigned long)ss->tx.req_bytes, 8);
1975         ss->tx.queue_active = 0;
1976
1977         bytes = rx_ring_entries * sizeof(*ss->rx_small.shadow);
1978         ss->rx_small.shadow = kzalloc(bytes, GFP_KERNEL);
1979         if (ss->rx_small.shadow == NULL)
1980                 goto abort_with_tx_req_bytes;
1981
1982         bytes = rx_ring_entries * sizeof(*ss->rx_big.shadow);
1983         ss->rx_big.shadow = kzalloc(bytes, GFP_KERNEL);
1984         if (ss->rx_big.shadow == NULL)
1985                 goto abort_with_rx_small_shadow;
1986
1987         /* allocate the host info rings */
1988
1989         bytes = tx_ring_entries * sizeof(*ss->tx.info);
1990         ss->tx.info = kzalloc(bytes, GFP_KERNEL);
1991         if (ss->tx.info == NULL)
1992                 goto abort_with_rx_big_shadow;
1993
1994         bytes = rx_ring_entries * sizeof(*ss->rx_small.info);
1995         ss->rx_small.info = kzalloc(bytes, GFP_KERNEL);
1996         if (ss->rx_small.info == NULL)
1997                 goto abort_with_tx_info;
1998
1999         bytes = rx_ring_entries * sizeof(*ss->rx_big.info);
2000         ss->rx_big.info = kzalloc(bytes, GFP_KERNEL);
2001         if (ss->rx_big.info == NULL)
2002                 goto abort_with_rx_small_info;
2003
2004         /* Fill the receive rings */
2005         ss->rx_big.cnt = 0;
2006         ss->rx_small.cnt = 0;
2007         ss->rx_big.fill_cnt = 0;
2008         ss->rx_small.fill_cnt = 0;
2009         ss->rx_small.page_offset = MYRI10GE_ALLOC_SIZE;
2010         ss->rx_big.page_offset = MYRI10GE_ALLOC_SIZE;
2011         ss->rx_small.watchdog_needed = 0;
2012         ss->rx_big.watchdog_needed = 0;
2013         if (mgp->small_bytes == 0) {
2014                 ss->rx_small.fill_cnt = ss->rx_small.mask + 1;
2015         } else {
2016                 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
2017                                         mgp->small_bytes + MXGEFW_PAD, 0);
2018         }
2019
2020         if (ss->rx_small.fill_cnt < ss->rx_small.mask + 1) {
2021                 netdev_err(dev, "slice-%d: alloced only %d small bufs\n",
2022                            slice, ss->rx_small.fill_cnt);
2023                 goto abort_with_rx_small_ring;
2024         }
2025
2026         myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
2027         if (ss->rx_big.fill_cnt < ss->rx_big.mask + 1) {
2028                 netdev_err(dev, "slice-%d: alloced only %d big bufs\n",
2029                            slice, ss->rx_big.fill_cnt);
2030                 goto abort_with_rx_big_ring;
2031         }
2032
2033         return 0;
2034
2035 abort_with_rx_big_ring:
2036         for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2037                 int idx = i & ss->rx_big.mask;
2038                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2039                                        mgp->big_bytes);
2040                 put_page(ss->rx_big.info[idx].page);
2041         }
2042
2043 abort_with_rx_small_ring:
2044         if (mgp->small_bytes == 0)
2045                 ss->rx_small.fill_cnt = ss->rx_small.cnt;
2046         for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2047                 int idx = i & ss->rx_small.mask;
2048                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2049                                        mgp->small_bytes + MXGEFW_PAD);
2050                 put_page(ss->rx_small.info[idx].page);
2051         }
2052
2053         kfree(ss->rx_big.info);
2054
2055 abort_with_rx_small_info:
2056         kfree(ss->rx_small.info);
2057
2058 abort_with_tx_info:
2059         kfree(ss->tx.info);
2060
2061 abort_with_rx_big_shadow:
2062         kfree(ss->rx_big.shadow);
2063
2064 abort_with_rx_small_shadow:
2065         kfree(ss->rx_small.shadow);
2066
2067 abort_with_tx_req_bytes:
2068         kfree(ss->tx.req_bytes);
2069         ss->tx.req_bytes = NULL;
2070         ss->tx.req_list = NULL;
2071
2072 abort_with_nothing:
2073         return status;
2074 }
2075
2076 static void myri10ge_free_rings(struct myri10ge_slice_state *ss)
2077 {
2078         struct myri10ge_priv *mgp = ss->mgp;
2079         struct sk_buff *skb;
2080         struct myri10ge_tx_buf *tx;
2081         int i, len, idx;
2082
2083         /* If not allocated, skip it */
2084         if (ss->tx.req_list == NULL)
2085                 return;
2086
2087         for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2088                 idx = i & ss->rx_big.mask;
2089                 if (i == ss->rx_big.fill_cnt - 1)
2090                         ss->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE;
2091                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2092                                        mgp->big_bytes);
2093                 put_page(ss->rx_big.info[idx].page);
2094         }
2095
2096         if (mgp->small_bytes == 0)
2097                 ss->rx_small.fill_cnt = ss->rx_small.cnt;
2098         for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2099                 idx = i & ss->rx_small.mask;
2100                 if (i == ss->rx_small.fill_cnt - 1)
2101                         ss->rx_small.info[idx].page_offset =
2102                             MYRI10GE_ALLOC_SIZE;
2103                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2104                                        mgp->small_bytes + MXGEFW_PAD);
2105                 put_page(ss->rx_small.info[idx].page);
2106         }
2107         tx = &ss->tx;
2108         while (tx->done != tx->req) {
2109                 idx = tx->done & tx->mask;
2110                 skb = tx->info[idx].skb;
2111
2112                 /* Mark as free */
2113                 tx->info[idx].skb = NULL;
2114                 tx->done++;
2115                 len = dma_unmap_len(&tx->info[idx], len);
2116                 dma_unmap_len_set(&tx->info[idx], len, 0);
2117                 if (skb) {
2118                         ss->stats.tx_dropped++;
2119                         dev_kfree_skb_any(skb);
2120                         if (len)
2121                                 dma_unmap_single(&mgp->pdev->dev,
2122                                                  dma_unmap_addr(&tx->info[idx],
2123                                                                 bus), len,
2124                                                  DMA_TO_DEVICE);
2125                 } else {
2126                         if (len)
2127                                 dma_unmap_page(&mgp->pdev->dev,
2128                                                dma_unmap_addr(&tx->info[idx],
2129                                                               bus), len,
2130                                                DMA_TO_DEVICE);
2131                 }
2132         }
2133         kfree(ss->rx_big.info);
2134
2135         kfree(ss->rx_small.info);
2136
2137         kfree(ss->tx.info);
2138
2139         kfree(ss->rx_big.shadow);
2140
2141         kfree(ss->rx_small.shadow);
2142
2143         kfree(ss->tx.req_bytes);
2144         ss->tx.req_bytes = NULL;
2145         ss->tx.req_list = NULL;
2146 }
2147
2148 static int myri10ge_request_irq(struct myri10ge_priv *mgp)
2149 {
2150         struct pci_dev *pdev = mgp->pdev;
2151         struct myri10ge_slice_state *ss;
2152         struct net_device *netdev = mgp->dev;
2153         int i;
2154         int status;
2155
2156         mgp->msi_enabled = 0;
2157         mgp->msix_enabled = 0;
2158         status = 0;
2159         if (myri10ge_msi) {
2160                 if (mgp->num_slices > 1) {
2161                         status = pci_enable_msix_range(pdev, mgp->msix_vectors,
2162                                         mgp->num_slices, mgp->num_slices);
2163                         if (status < 0) {
2164                                 dev_err(&pdev->dev,
2165                                         "Error %d setting up MSI-X\n", status);
2166                                 return status;
2167                         }
2168                         mgp->msix_enabled = 1;
2169                 }
2170                 if (mgp->msix_enabled == 0) {
2171                         status = pci_enable_msi(pdev);
2172                         if (status != 0) {
2173                                 dev_err(&pdev->dev,
2174                                         "Error %d setting up MSI; falling back to xPIC\n",
2175                                         status);
2176                         } else {
2177                                 mgp->msi_enabled = 1;
2178                         }
2179                 }
2180         }
2181         if (mgp->msix_enabled) {
2182                 for (i = 0; i < mgp->num_slices; i++) {
2183                         ss = &mgp->ss[i];
2184                         snprintf(ss->irq_desc, sizeof(ss->irq_desc),
2185                                  "%s:slice-%d", netdev->name, i);
2186                         status = request_irq(mgp->msix_vectors[i].vector,
2187                                              myri10ge_intr, 0, ss->irq_desc,
2188                                              ss);
2189                         if (status != 0) {
2190                                 dev_err(&pdev->dev,
2191                                         "slice %d failed to allocate IRQ\n", i);
2192                                 i--;
2193                                 while (i >= 0) {
2194                                         free_irq(mgp->msix_vectors[i].vector,
2195                                                  &mgp->ss[i]);
2196                                         i--;
2197                                 }
2198                                 pci_disable_msix(pdev);
2199                                 return status;
2200                         }
2201                 }
2202         } else {
2203                 status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED,
2204                                      mgp->dev->name, &mgp->ss[0]);
2205                 if (status != 0) {
2206                         dev_err(&pdev->dev, "failed to allocate IRQ\n");
2207                         if (mgp->msi_enabled)
2208                                 pci_disable_msi(pdev);
2209                 }
2210         }
2211         return status;
2212 }
2213
2214 static void myri10ge_free_irq(struct myri10ge_priv *mgp)
2215 {
2216         struct pci_dev *pdev = mgp->pdev;
2217         int i;
2218
2219         if (mgp->msix_enabled) {
2220                 for (i = 0; i < mgp->num_slices; i++)
2221                         free_irq(mgp->msix_vectors[i].vector, &mgp->ss[i]);
2222         } else {
2223                 free_irq(pdev->irq, &mgp->ss[0]);
2224         }
2225         if (mgp->msi_enabled)
2226                 pci_disable_msi(pdev);
2227         if (mgp->msix_enabled)
2228                 pci_disable_msix(pdev);
2229 }
2230
2231 static int myri10ge_get_txrx(struct myri10ge_priv *mgp, int slice)
2232 {
2233         struct myri10ge_cmd cmd;
2234         struct myri10ge_slice_state *ss;
2235         int status;
2236
2237         ss = &mgp->ss[slice];
2238         status = 0;
2239         if (slice == 0 || (mgp->dev->real_num_tx_queues > 1)) {
2240                 cmd.data0 = slice;
2241                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET,
2242                                            &cmd, 0);
2243                 ss->tx.lanai = (struct mcp_kreq_ether_send __iomem *)
2244                     (mgp->sram + cmd.data0);
2245         }
2246         cmd.data0 = slice;
2247         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET,
2248                                     &cmd, 0);
2249         ss->rx_small.lanai = (struct mcp_kreq_ether_recv __iomem *)
2250             (mgp->sram + cmd.data0);
2251
2252         cmd.data0 = slice;
2253         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0);
2254         ss->rx_big.lanai = (struct mcp_kreq_ether_recv __iomem *)
2255             (mgp->sram + cmd.data0);
2256
2257         ss->tx.send_go = (__iomem __be32 *)
2258             (mgp->sram + MXGEFW_ETH_SEND_GO + 64 * slice);
2259         ss->tx.send_stop = (__iomem __be32 *)
2260             (mgp->sram + MXGEFW_ETH_SEND_STOP + 64 * slice);
2261         return status;
2262
2263 }
2264
2265 static int myri10ge_set_stats(struct myri10ge_priv *mgp, int slice)
2266 {
2267         struct myri10ge_cmd cmd;
2268         struct myri10ge_slice_state *ss;
2269         int status;
2270
2271         ss = &mgp->ss[slice];
2272         cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->fw_stats_bus);
2273         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->fw_stats_bus);
2274         cmd.data2 = sizeof(struct mcp_irq_data) | (slice << 16);
2275         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0);
2276         if (status == -ENOSYS) {
2277                 dma_addr_t bus = ss->fw_stats_bus;
2278                 if (slice != 0)
2279                         return -EINVAL;
2280                 bus += offsetof(struct mcp_irq_data, send_done_count);
2281                 cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus);
2282                 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus);
2283                 status = myri10ge_send_cmd(mgp,
2284                                            MXGEFW_CMD_SET_STATS_DMA_OBSOLETE,
2285                                            &cmd, 0);
2286                 /* Firmware cannot support multicast without STATS_DMA_V2 */
2287                 mgp->fw_multicast_support = 0;
2288         } else {
2289                 mgp->fw_multicast_support = 1;
2290         }
2291         return 0;
2292 }
2293
2294 static int myri10ge_open(struct net_device *dev)
2295 {
2296         struct myri10ge_slice_state *ss;
2297         struct myri10ge_priv *mgp = netdev_priv(dev);
2298         struct myri10ge_cmd cmd;
2299         int i, status, big_pow2, slice;
2300         u8 __iomem *itable;
2301
2302         if (mgp->running != MYRI10GE_ETH_STOPPED)
2303                 return -EBUSY;
2304
2305         mgp->running = MYRI10GE_ETH_STARTING;
2306         status = myri10ge_reset(mgp);
2307         if (status != 0) {
2308                 netdev_err(dev, "failed reset\n");
2309                 goto abort_with_nothing;
2310         }
2311
2312         if (mgp->num_slices > 1) {
2313                 cmd.data0 = mgp->num_slices;
2314                 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
2315                 if (mgp->dev->real_num_tx_queues > 1)
2316                         cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
2317                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
2318                                            &cmd, 0);
2319                 if (status != 0) {
2320                         netdev_err(dev, "failed to set number of slices\n");
2321                         goto abort_with_nothing;
2322                 }
2323                 /* setup the indirection table */
2324                 cmd.data0 = mgp->num_slices;
2325                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_TABLE_SIZE,
2326                                            &cmd, 0);
2327
2328                 status |= myri10ge_send_cmd(mgp,
2329                                             MXGEFW_CMD_GET_RSS_TABLE_OFFSET,
2330                                             &cmd, 0);
2331                 if (status != 0) {
2332                         netdev_err(dev, "failed to setup rss tables\n");
2333                         goto abort_with_nothing;
2334                 }
2335
2336                 /* just enable an identity mapping */
2337                 itable = mgp->sram + cmd.data0;
2338                 for (i = 0; i < mgp->num_slices; i++)
2339                         __raw_writeb(i, &itable[i]);
2340
2341                 cmd.data0 = 1;
2342                 cmd.data1 = myri10ge_rss_hash;
2343                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_ENABLE,
2344                                            &cmd, 0);
2345                 if (status != 0) {
2346                         netdev_err(dev, "failed to enable slices\n");
2347                         goto abort_with_nothing;
2348                 }
2349         }
2350
2351         status = myri10ge_request_irq(mgp);
2352         if (status != 0)
2353                 goto abort_with_nothing;
2354
2355         /* decide what small buffer size to use.  For good TCP rx
2356          * performance, it is important to not receive 1514 byte
2357          * frames into jumbo buffers, as it confuses the socket buffer
2358          * accounting code, leading to drops and erratic performance.
2359          */
2360
2361         if (dev->mtu <= ETH_DATA_LEN)
2362                 /* enough for a TCP header */
2363                 mgp->small_bytes = (128 > SMP_CACHE_BYTES)
2364                     ? (128 - MXGEFW_PAD)
2365                     : (SMP_CACHE_BYTES - MXGEFW_PAD);
2366         else
2367                 /* enough for a vlan encapsulated ETH_DATA_LEN frame */
2368                 mgp->small_bytes = VLAN_ETH_FRAME_LEN;
2369
2370         /* Override the small buffer size? */
2371         if (myri10ge_small_bytes >= 0)
2372                 mgp->small_bytes = myri10ge_small_bytes;
2373
2374         /* Firmware needs the big buff size as a power of 2.  Lie and
2375          * tell him the buffer is larger, because we only use 1
2376          * buffer/pkt, and the mtu will prevent overruns.
2377          */
2378         big_pow2 = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2379         if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) {
2380                 while (!is_power_of_2(big_pow2))
2381                         big_pow2++;
2382                 mgp->big_bytes = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2383         } else {
2384                 big_pow2 = MYRI10GE_ALLOC_SIZE;
2385                 mgp->big_bytes = big_pow2;
2386         }
2387
2388         /* setup the per-slice data structures */
2389         for (slice = 0; slice < mgp->num_slices; slice++) {
2390                 ss = &mgp->ss[slice];
2391
2392                 status = myri10ge_get_txrx(mgp, slice);
2393                 if (status != 0) {
2394                         netdev_err(dev, "failed to get ring sizes or locations\n");
2395                         goto abort_with_rings;
2396                 }
2397                 status = myri10ge_allocate_rings(ss);
2398                 if (status != 0)
2399                         goto abort_with_rings;
2400
2401                 /* only firmware which supports multiple TX queues
2402                  * supports setting up the tx stats on non-zero
2403                  * slices */
2404                 if (slice == 0 || mgp->dev->real_num_tx_queues > 1)
2405                         status = myri10ge_set_stats(mgp, slice);
2406                 if (status) {
2407                         netdev_err(dev, "Couldn't set stats DMA\n");
2408                         goto abort_with_rings;
2409                 }
2410
2411                 /* must happen prior to any irq */
2412                 napi_enable(&(ss)->napi);
2413         }
2414
2415         /* now give firmware buffers sizes, and MTU */
2416         cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
2417         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0);
2418         cmd.data0 = mgp->small_bytes;
2419         status |=
2420             myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0);
2421         cmd.data0 = big_pow2;
2422         status |=
2423             myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0);
2424         if (status) {
2425                 netdev_err(dev, "Couldn't set buffer sizes\n");
2426                 goto abort_with_rings;
2427         }
2428
2429         /*
2430          * Set Linux style TSO mode; this is needed only on newer
2431          *  firmware versions.  Older versions default to Linux
2432          *  style TSO
2433          */
2434         cmd.data0 = 0;
2435         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_TSO_MODE, &cmd, 0);
2436         if (status && status != -ENOSYS) {
2437                 netdev_err(dev, "Couldn't set TSO mode\n");
2438                 goto abort_with_rings;
2439         }
2440
2441         mgp->link_state = ~0U;
2442         mgp->rdma_tags_available = 15;
2443
2444         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0);
2445         if (status) {
2446                 netdev_err(dev, "Couldn't bring up link\n");
2447                 goto abort_with_rings;
2448         }
2449
2450         mgp->running = MYRI10GE_ETH_RUNNING;
2451         mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ;
2452         add_timer(&mgp->watchdog_timer);
2453         netif_tx_wake_all_queues(dev);
2454
2455         return 0;
2456
2457 abort_with_rings:
2458         while (slice) {
2459                 slice--;
2460                 napi_disable(&mgp->ss[slice].napi);
2461         }
2462         for (i = 0; i < mgp->num_slices; i++)
2463                 myri10ge_free_rings(&mgp->ss[i]);
2464
2465         myri10ge_free_irq(mgp);
2466
2467 abort_with_nothing:
2468         mgp->running = MYRI10GE_ETH_STOPPED;
2469         return -ENOMEM;
2470 }
2471
2472 static int myri10ge_close(struct net_device *dev)
2473 {
2474         struct myri10ge_priv *mgp = netdev_priv(dev);
2475         struct myri10ge_cmd cmd;
2476         int status, old_down_cnt;
2477         int i;
2478
2479         if (mgp->running != MYRI10GE_ETH_RUNNING)
2480                 return 0;
2481
2482         if (mgp->ss[0].tx.req_bytes == NULL)
2483                 return 0;
2484
2485         del_timer_sync(&mgp->watchdog_timer);
2486         mgp->running = MYRI10GE_ETH_STOPPING;
2487         for (i = 0; i < mgp->num_slices; i++)
2488                 napi_disable(&mgp->ss[i].napi);
2489
2490         netif_carrier_off(dev);
2491
2492         netif_tx_stop_all_queues(dev);
2493         if (mgp->rebooted == 0) {
2494                 old_down_cnt = mgp->down_cnt;
2495                 mb();
2496                 status =
2497                     myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0);
2498                 if (status)
2499                         netdev_err(dev, "Couldn't bring down link\n");
2500
2501                 wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt,
2502                                    HZ);
2503                 if (old_down_cnt == mgp->down_cnt)
2504                         netdev_err(dev, "never got down irq\n");
2505         }
2506         netif_tx_disable(dev);
2507         myri10ge_free_irq(mgp);
2508         for (i = 0; i < mgp->num_slices; i++)
2509                 myri10ge_free_rings(&mgp->ss[i]);
2510
2511         mgp->running = MYRI10GE_ETH_STOPPED;
2512         return 0;
2513 }
2514
2515 /* copy an array of struct mcp_kreq_ether_send's to the mcp.  Copy
2516  * backwards one at a time and handle ring wraps */
2517
2518 static inline void
2519 myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx,
2520                               struct mcp_kreq_ether_send *src, int cnt)
2521 {
2522         int idx, starting_slot;
2523         starting_slot = tx->req;
2524         while (cnt > 1) {
2525                 cnt--;
2526                 idx = (starting_slot + cnt) & tx->mask;
2527                 myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src));
2528                 mb();
2529         }
2530 }
2531
2532 /*
2533  * copy an array of struct mcp_kreq_ether_send's to the mcp.  Copy
2534  * at most 32 bytes at a time, so as to avoid involving the software
2535  * pio handler in the nic.   We re-write the first segment's flags
2536  * to mark them valid only after writing the entire chain.
2537  */
2538
2539 static inline void
2540 myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src,
2541                     int cnt)
2542 {
2543         int idx, i;
2544         struct mcp_kreq_ether_send __iomem *dstp, *dst;
2545         struct mcp_kreq_ether_send *srcp;
2546         u8 last_flags;
2547
2548         idx = tx->req & tx->mask;
2549
2550         last_flags = src->flags;
2551         src->flags = 0;
2552         mb();
2553         dst = dstp = &tx->lanai[idx];
2554         srcp = src;
2555
2556         if ((idx + cnt) < tx->mask) {
2557                 for (i = 0; i < (cnt - 1); i += 2) {
2558                         myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src));
2559                         mb();   /* force write every 32 bytes */
2560                         srcp += 2;
2561                         dstp += 2;
2562                 }
2563         } else {
2564                 /* submit all but the first request, and ensure
2565                  * that it is submitted below */
2566                 myri10ge_submit_req_backwards(tx, src, cnt);
2567                 i = 0;
2568         }
2569         if (i < cnt) {
2570                 /* submit the first request */
2571                 myri10ge_pio_copy(dstp, srcp, sizeof(*src));
2572                 mb();           /* barrier before setting valid flag */
2573         }
2574
2575         /* re-write the last 32-bits with the valid flags */
2576         src->flags = last_flags;
2577         put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3);
2578         tx->req += cnt;
2579         mb();
2580 }
2581
2582 static void myri10ge_unmap_tx_dma(struct myri10ge_priv *mgp,
2583                                   struct myri10ge_tx_buf *tx, int idx)
2584 {
2585         unsigned int len;
2586         int last_idx;
2587
2588         /* Free any DMA resources we've alloced and clear out the skb slot */
2589         last_idx = (idx + 1) & tx->mask;
2590         idx = tx->req & tx->mask;
2591         do {
2592                 len = dma_unmap_len(&tx->info[idx], len);
2593                 if (len) {
2594                         if (tx->info[idx].skb != NULL)
2595                                 dma_unmap_single(&mgp->pdev->dev,
2596                                                  dma_unmap_addr(&tx->info[idx],
2597                                                                 bus), len,
2598                                                  DMA_TO_DEVICE);
2599                         else
2600                                 dma_unmap_page(&mgp->pdev->dev,
2601                                                dma_unmap_addr(&tx->info[idx],
2602                                                               bus), len,
2603                                                DMA_TO_DEVICE);
2604                         dma_unmap_len_set(&tx->info[idx], len, 0);
2605                         tx->info[idx].skb = NULL;
2606                 }
2607                 idx = (idx + 1) & tx->mask;
2608         } while (idx != last_idx);
2609 }
2610
2611 /*
2612  * Transmit a packet.  We need to split the packet so that a single
2613  * segment does not cross myri10ge->tx_boundary, so this makes segment
2614  * counting tricky.  So rather than try to count segments up front, we
2615  * just give up if there are too few segments to hold a reasonably
2616  * fragmented packet currently available.  If we run
2617  * out of segments while preparing a packet for DMA, we just linearize
2618  * it and try again.
2619  */
2620
2621 static netdev_tx_t myri10ge_xmit(struct sk_buff *skb,
2622                                        struct net_device *dev)
2623 {
2624         struct myri10ge_priv *mgp = netdev_priv(dev);
2625         struct myri10ge_slice_state *ss;
2626         struct mcp_kreq_ether_send *req;
2627         struct myri10ge_tx_buf *tx;
2628         skb_frag_t *frag;
2629         struct netdev_queue *netdev_queue;
2630         dma_addr_t bus;
2631         u32 low;
2632         __be32 high_swapped;
2633         unsigned int len;
2634         int idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
2635         u16 pseudo_hdr_offset, cksum_offset, queue;
2636         int cum_len, seglen, boundary, rdma_count;
2637         u8 flags, odd_flag;
2638
2639         queue = skb_get_queue_mapping(skb);
2640         ss = &mgp->ss[queue];
2641         netdev_queue = netdev_get_tx_queue(mgp->dev, queue);
2642         tx = &ss->tx;
2643
2644 again:
2645         req = tx->req_list;
2646         avail = tx->mask - 1 - (tx->req - tx->done);
2647
2648         mss = 0;
2649         max_segments = MXGEFW_MAX_SEND_DESC;
2650
2651         if (skb_is_gso(skb)) {
2652                 mss = skb_shinfo(skb)->gso_size;
2653                 max_segments = MYRI10GE_MAX_SEND_DESC_TSO;
2654         }
2655
2656         if ((unlikely(avail < max_segments))) {
2657                 /* we are out of transmit resources */
2658                 tx->stop_queue++;
2659                 netif_tx_stop_queue(netdev_queue);
2660                 return NETDEV_TX_BUSY;
2661         }
2662
2663         /* Setup checksum offloading, if needed */
2664         cksum_offset = 0;
2665         pseudo_hdr_offset = 0;
2666         odd_flag = 0;
2667         flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
2668         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2669                 cksum_offset = skb_checksum_start_offset(skb);
2670                 pseudo_hdr_offset = cksum_offset + skb->csum_offset;
2671                 /* If the headers are excessively large, then we must
2672                  * fall back to a software checksum */
2673                 if (unlikely(!mss && (cksum_offset > 255 ||
2674                                       pseudo_hdr_offset > 127))) {
2675                         if (skb_checksum_help(skb))
2676                                 goto drop;
2677                         cksum_offset = 0;
2678                         pseudo_hdr_offset = 0;
2679                 } else {
2680                         odd_flag = MXGEFW_FLAGS_ALIGN_ODD;
2681                         flags |= MXGEFW_FLAGS_CKSUM;
2682                 }
2683         }
2684
2685         cum_len = 0;
2686
2687         if (mss) {              /* TSO */
2688                 /* this removes any CKSUM flag from before */
2689                 flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST);
2690
2691                 /* negative cum_len signifies to the
2692                  * send loop that we are still in the
2693                  * header portion of the TSO packet.
2694                  * TSO header can be at most 1KB long */
2695                 cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb));
2696
2697                 /* for IPv6 TSO, the checksum offset stores the
2698                  * TCP header length, to save the firmware from
2699                  * the need to parse the headers */
2700                 if (skb_is_gso_v6(skb)) {
2701                         cksum_offset = tcp_hdrlen(skb);
2702                         /* Can only handle headers <= max_tso6 long */
2703                         if (unlikely(-cum_len > mgp->max_tso6))
2704                                 return myri10ge_sw_tso(skb, dev);
2705                 }
2706                 /* for TSO, pseudo_hdr_offset holds mss.
2707                  * The firmware figures out where to put
2708                  * the checksum by parsing the header. */
2709                 pseudo_hdr_offset = mss;
2710         } else
2711                 /* Mark small packets, and pad out tiny packets */
2712         if (skb->len <= MXGEFW_SEND_SMALL_SIZE) {
2713                 flags |= MXGEFW_FLAGS_SMALL;
2714
2715                 /* pad frames to at least ETH_ZLEN bytes */
2716                 if (eth_skb_pad(skb)) {
2717                         /* The packet is gone, so we must
2718                          * return 0 */
2719                         ss->stats.tx_dropped += 1;
2720                         return NETDEV_TX_OK;
2721                 }
2722         }
2723
2724         /* map the skb for DMA */
2725         len = skb_headlen(skb);
2726         bus = dma_map_single(&mgp->pdev->dev, skb->data, len, DMA_TO_DEVICE);
2727         if (unlikely(dma_mapping_error(&mgp->pdev->dev, bus)))
2728                 goto drop;
2729
2730         idx = tx->req & tx->mask;
2731         tx->info[idx].skb = skb;
2732         dma_unmap_addr_set(&tx->info[idx], bus, bus);
2733         dma_unmap_len_set(&tx->info[idx], len, len);
2734
2735         frag_cnt = skb_shinfo(skb)->nr_frags;
2736         frag_idx = 0;
2737         count = 0;
2738         rdma_count = 0;
2739
2740         /* "rdma_count" is the number of RDMAs belonging to the
2741          * current packet BEFORE the current send request. For
2742          * non-TSO packets, this is equal to "count".
2743          * For TSO packets, rdma_count needs to be reset
2744          * to 0 after a segment cut.
2745          *
2746          * The rdma_count field of the send request is
2747          * the number of RDMAs of the packet starting at
2748          * that request. For TSO send requests with one ore more cuts
2749          * in the middle, this is the number of RDMAs starting
2750          * after the last cut in the request. All previous
2751          * segments before the last cut implicitly have 1 RDMA.
2752          *
2753          * Since the number of RDMAs is not known beforehand,
2754          * it must be filled-in retroactively - after each
2755          * segmentation cut or at the end of the entire packet.
2756          */
2757
2758         while (1) {
2759                 /* Break the SKB or Fragment up into pieces which
2760                  * do not cross mgp->tx_boundary */
2761                 low = MYRI10GE_LOWPART_TO_U32(bus);
2762                 high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
2763                 while (len) {
2764                         u8 flags_next;
2765                         int cum_len_next;
2766
2767                         if (unlikely(count == max_segments))
2768                                 goto abort_linearize;
2769
2770                         boundary =
2771                             (low + mgp->tx_boundary) & ~(mgp->tx_boundary - 1);
2772                         seglen = boundary - low;
2773                         if (seglen > len)
2774                                 seglen = len;
2775                         flags_next = flags & ~MXGEFW_FLAGS_FIRST;
2776                         cum_len_next = cum_len + seglen;
2777                         if (mss) {      /* TSO */
2778                                 (req - rdma_count)->rdma_count = rdma_count + 1;
2779
2780                                 if (likely(cum_len >= 0)) {     /* payload */
2781                                         int next_is_first, chop;
2782
2783                                         chop = (cum_len_next > mss);
2784                                         cum_len_next = cum_len_next % mss;
2785                                         next_is_first = (cum_len_next == 0);
2786                                         flags |= chop * MXGEFW_FLAGS_TSO_CHOP;
2787                                         flags_next |= next_is_first *
2788                                             MXGEFW_FLAGS_FIRST;
2789                                         rdma_count |= -(chop | next_is_first);
2790                                         rdma_count += chop & ~next_is_first;
2791                                 } else if (likely(cum_len_next >= 0)) { /* header ends */
2792                                         int small;
2793
2794                                         rdma_count = -1;
2795                                         cum_len_next = 0;
2796                                         seglen = -cum_len;
2797                                         small = (mss <= MXGEFW_SEND_SMALL_SIZE);
2798                                         flags_next = MXGEFW_FLAGS_TSO_PLD |
2799                                             MXGEFW_FLAGS_FIRST |
2800                                             (small * MXGEFW_FLAGS_SMALL);
2801                                 }
2802                         }
2803                         req->addr_high = high_swapped;
2804                         req->addr_low = htonl(low);
2805                         req->pseudo_hdr_offset = htons(pseudo_hdr_offset);
2806                         req->pad = 0;   /* complete solid 16-byte block; does this matter? */
2807                         req->rdma_count = 1;
2808                         req->length = htons(seglen);
2809                         req->cksum_offset = cksum_offset;
2810                         req->flags = flags | ((cum_len & 1) * odd_flag);
2811
2812                         low += seglen;
2813                         len -= seglen;
2814                         cum_len = cum_len_next;
2815                         flags = flags_next;
2816                         req++;
2817                         count++;
2818                         rdma_count++;
2819                         if (cksum_offset != 0 && !(mss && skb_is_gso_v6(skb))) {
2820                                 if (unlikely(cksum_offset > seglen))
2821                                         cksum_offset -= seglen;
2822                                 else
2823                                         cksum_offset = 0;
2824                         }
2825                 }
2826                 if (frag_idx == frag_cnt)
2827                         break;
2828
2829                 /* map next fragment for DMA */
2830                 frag = &skb_shinfo(skb)->frags[frag_idx];
2831                 frag_idx++;
2832                 len = skb_frag_size(frag);
2833                 bus = skb_frag_dma_map(&mgp->pdev->dev, frag, 0, len,
2834                                        DMA_TO_DEVICE);
2835                 if (unlikely(dma_mapping_error(&mgp->pdev->dev, bus))) {
2836                         myri10ge_unmap_tx_dma(mgp, tx, idx);
2837                         goto drop;
2838                 }
2839                 idx = (count + tx->req) & tx->mask;
2840                 dma_unmap_addr_set(&tx->info[idx], bus, bus);
2841                 dma_unmap_len_set(&tx->info[idx], len, len);
2842         }
2843
2844         (req - rdma_count)->rdma_count = rdma_count;
2845         if (mss)
2846                 do {
2847                         req--;
2848                         req->flags |= MXGEFW_FLAGS_TSO_LAST;
2849                 } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP |
2850                                          MXGEFW_FLAGS_FIRST)));
2851         idx = ((count - 1) + tx->req) & tx->mask;
2852         tx->info[idx].last = 1;
2853         myri10ge_submit_req(tx, tx->req_list, count);
2854         /* if using multiple tx queues, make sure NIC polls the
2855          * current slice */
2856         if ((mgp->dev->real_num_tx_queues > 1) && tx->queue_active == 0) {
2857                 tx->queue_active = 1;
2858                 put_be32(htonl(1), tx->send_go);
2859                 mb();
2860         }
2861         tx->pkt_start++;
2862         if ((avail - count) < MXGEFW_MAX_SEND_DESC) {
2863                 tx->stop_queue++;
2864                 netif_tx_stop_queue(netdev_queue);
2865         }
2866         return NETDEV_TX_OK;
2867
2868 abort_linearize:
2869         myri10ge_unmap_tx_dma(mgp, tx, idx);
2870
2871         if (skb_is_gso(skb)) {
2872                 netdev_err(mgp->dev, "TSO but wanted to linearize?!?!?\n");
2873                 goto drop;
2874         }
2875
2876         if (skb_linearize(skb))
2877                 goto drop;
2878
2879         tx->linearized++;
2880         goto again;
2881
2882 drop:
2883         dev_kfree_skb_any(skb);
2884         ss->stats.tx_dropped += 1;
2885         return NETDEV_TX_OK;
2886
2887 }
2888
2889 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
2890                                          struct net_device *dev)
2891 {
2892         struct sk_buff *segs, *curr, *next;
2893         struct myri10ge_priv *mgp = netdev_priv(dev);
2894         struct myri10ge_slice_state *ss;
2895         netdev_tx_t status;
2896
2897         segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO6);
2898         if (IS_ERR(segs))
2899                 goto drop;
2900
2901         skb_list_walk_safe(segs, curr, next) {
2902                 skb_mark_not_on_list(curr);
2903                 status = myri10ge_xmit(curr, dev);
2904                 if (status != 0) {
2905                         dev_kfree_skb_any(curr);
2906                         skb_list_walk_safe(next, curr, next) {
2907                                 curr->next = NULL;
2908                                 dev_kfree_skb_any(curr);
2909                         }
2910                         goto drop;
2911                 }
2912         }
2913         dev_kfree_skb_any(skb);
2914         return NETDEV_TX_OK;
2915
2916 drop:
2917         ss = &mgp->ss[skb_get_queue_mapping(skb)];
2918         dev_kfree_skb_any(skb);
2919         ss->stats.tx_dropped += 1;
2920         return NETDEV_TX_OK;
2921 }
2922
2923 static void myri10ge_get_stats(struct net_device *dev,
2924                                struct rtnl_link_stats64 *stats)
2925 {
2926         const struct myri10ge_priv *mgp = netdev_priv(dev);
2927         const struct myri10ge_slice_netstats *slice_stats;
2928         int i;
2929
2930         for (i = 0; i < mgp->num_slices; i++) {
2931                 slice_stats = &mgp->ss[i].stats;
2932                 stats->rx_packets += slice_stats->rx_packets;
2933                 stats->tx_packets += slice_stats->tx_packets;
2934                 stats->rx_bytes += slice_stats->rx_bytes;
2935                 stats->tx_bytes += slice_stats->tx_bytes;
2936                 stats->rx_dropped += slice_stats->rx_dropped;
2937                 stats->tx_dropped += slice_stats->tx_dropped;
2938         }
2939 }
2940
2941 static void myri10ge_set_multicast_list(struct net_device *dev)
2942 {
2943         struct myri10ge_priv *mgp = netdev_priv(dev);
2944         struct myri10ge_cmd cmd;
2945         struct netdev_hw_addr *ha;
2946         __be32 data[2] = { 0, 0 };
2947         int err;
2948
2949         /* can be called from atomic contexts,
2950          * pass 1 to force atomicity in myri10ge_send_cmd() */
2951         myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1);
2952
2953         /* This firmware is known to not support multicast */
2954         if (!mgp->fw_multicast_support)
2955                 return;
2956
2957         /* Disable multicast filtering */
2958
2959         err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1);
2960         if (err != 0) {
2961                 netdev_err(dev, "Failed MXGEFW_ENABLE_ALLMULTI, error status: %d\n",
2962                            err);
2963                 goto abort;
2964         }
2965
2966         if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) {
2967                 /* request to disable multicast filtering, so quit here */
2968                 return;
2969         }
2970
2971         /* Flush the filters */
2972
2973         err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS,
2974                                 &cmd, 1);
2975         if (err != 0) {
2976                 netdev_err(dev, "Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS, error status: %d\n",
2977                            err);
2978                 goto abort;
2979         }
2980
2981         /* Walk the multicast list, and add each address */
2982         netdev_for_each_mc_addr(ha, dev) {
2983                 memcpy(data, &ha->addr, ETH_ALEN);
2984                 cmd.data0 = ntohl(data[0]);
2985                 cmd.data1 = ntohl(data[1]);
2986                 err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP,
2987                                         &cmd, 1);
2988
2989                 if (err != 0) {
2990                         netdev_err(dev, "Failed MXGEFW_JOIN_MULTICAST_GROUP, error status:%d %pM\n",
2991                                    err, ha->addr);
2992                         goto abort;
2993                 }
2994         }
2995         /* Enable multicast filtering */
2996         err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1);
2997         if (err != 0) {
2998                 netdev_err(dev, "Failed MXGEFW_DISABLE_ALLMULTI, error status: %d\n",
2999                            err);
3000                 goto abort;
3001         }
3002
3003         return;
3004
3005 abort:
3006         return;
3007 }
3008
3009 static int myri10ge_set_mac_address(struct net_device *dev, void *addr)
3010 {
3011         struct sockaddr *sa = addr;
3012         struct myri10ge_priv *mgp = netdev_priv(dev);
3013         int status;
3014
3015         if (!is_valid_ether_addr(sa->sa_data))
3016                 return -EADDRNOTAVAIL;
3017
3018         status = myri10ge_update_mac_address(mgp, sa->sa_data);
3019         if (status != 0) {
3020                 netdev_err(dev, "changing mac address failed with %d\n",
3021                            status);
3022                 return status;
3023         }
3024
3025         /* change the dev structure */
3026         eth_hw_addr_set(dev, sa->sa_data);
3027         return 0;
3028 }
3029
3030 static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
3031 {
3032         struct myri10ge_priv *mgp = netdev_priv(dev);
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 0;
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         kernel_param_lock(THIS_MODULE);
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         kernel_param_unlock(THIS_MODULE);
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 static int __maybe_unused myri10ge_suspend(struct device *dev)
3267 {
3268         struct myri10ge_priv *mgp;
3269         struct net_device *netdev;
3270
3271         mgp = dev_get_drvdata(dev);
3272         if (mgp == NULL)
3273                 return -EINVAL;
3274         netdev = mgp->dev;
3275
3276         netif_device_detach(netdev);
3277         if (netif_running(netdev)) {
3278                 netdev_info(netdev, "closing\n");
3279                 rtnl_lock();
3280                 myri10ge_close(netdev);
3281                 rtnl_unlock();
3282         }
3283         myri10ge_dummy_rdma(mgp, 0);
3284
3285         return 0;
3286 }
3287
3288 static int __maybe_unused myri10ge_resume(struct device *dev)
3289 {
3290         struct pci_dev *pdev = to_pci_dev(dev);
3291         struct myri10ge_priv *mgp;
3292         struct net_device *netdev;
3293         int status;
3294         u16 vendor;
3295
3296         mgp = pci_get_drvdata(pdev);
3297         if (mgp == NULL)
3298                 return -EINVAL;
3299         netdev = mgp->dev;
3300         msleep(5);              /* give card time to respond */
3301         pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3302         if (vendor == 0xffff) {
3303                 netdev_err(mgp->dev, "device disappeared!\n");
3304                 return -EIO;
3305         }
3306
3307         myri10ge_reset(mgp);
3308         myri10ge_dummy_rdma(mgp, 1);
3309
3310         if (netif_running(netdev)) {
3311                 rtnl_lock();
3312                 status = myri10ge_open(netdev);
3313                 rtnl_unlock();
3314                 if (status != 0)
3315                         goto abort_with_enabled;
3316
3317         }
3318         netif_device_attach(netdev);
3319
3320         return 0;
3321
3322 abort_with_enabled:
3323         return -EIO;
3324 }
3325
3326 static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp)
3327 {
3328         struct pci_dev *pdev = mgp->pdev;
3329         int vs = mgp->vendor_specific_offset;
3330         u32 reboot;
3331
3332         /*enter read32 mode */
3333         pci_write_config_byte(pdev, vs + 0x10, 0x3);
3334
3335         /*read REBOOT_STATUS (0xfffffff0) */
3336         pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0);
3337         pci_read_config_dword(pdev, vs + 0x14, &reboot);
3338         return reboot;
3339 }
3340
3341 static void
3342 myri10ge_check_slice(struct myri10ge_slice_state *ss, int *reset_needed,
3343                      int *busy_slice_cnt, u32 rx_pause_cnt)
3344 {
3345         struct myri10ge_priv *mgp = ss->mgp;
3346         int slice = ss - mgp->ss;
3347
3348         if (ss->tx.req != ss->tx.done &&
3349             ss->tx.done == ss->watchdog_tx_done &&
3350             ss->watchdog_tx_req != ss->watchdog_tx_done) {
3351                 /* nic seems like it might be stuck.. */
3352                 if (rx_pause_cnt != mgp->watchdog_pause) {
3353                         if (net_ratelimit())
3354                                 netdev_warn(mgp->dev, "slice %d: TX paused, "
3355                                             "check link partner\n", slice);
3356                 } else {
3357                         netdev_warn(mgp->dev,
3358                                     "slice %d: TX stuck %d %d %d %d %d %d\n",
3359                                     slice, ss->tx.queue_active, ss->tx.req,
3360                                     ss->tx.done, ss->tx.pkt_start,
3361                                     ss->tx.pkt_done,
3362                                     (int)ntohl(mgp->ss[slice].fw_stats->
3363                                                send_done_count));
3364                         *reset_needed = 1;
3365                         ss->stuck = 1;
3366                 }
3367         }
3368         if (ss->watchdog_tx_done != ss->tx.done ||
3369             ss->watchdog_rx_done != ss->rx_done.cnt) {
3370                 *busy_slice_cnt += 1;
3371         }
3372         ss->watchdog_tx_done = ss->tx.done;
3373         ss->watchdog_tx_req = ss->tx.req;
3374         ss->watchdog_rx_done = ss->rx_done.cnt;
3375 }
3376
3377 /*
3378  * This watchdog is used to check whether the board has suffered
3379  * from a parity error and needs to be recovered.
3380  */
3381 static void myri10ge_watchdog(struct work_struct *work)
3382 {
3383         struct myri10ge_priv *mgp =
3384             container_of(work, struct myri10ge_priv, watchdog_work);
3385         struct myri10ge_slice_state *ss;
3386         u32 reboot, rx_pause_cnt;
3387         int status, rebooted;
3388         int i;
3389         int reset_needed = 0;
3390         int busy_slice_cnt = 0;
3391         u16 cmd, vendor;
3392
3393         mgp->watchdog_resets++;
3394         pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3395         rebooted = 0;
3396         if ((cmd & PCI_COMMAND_MASTER) == 0) {
3397                 /* Bus master DMA disabled?  Check to see
3398                  * if the card rebooted due to a parity error
3399                  * For now, just report it */
3400                 reboot = myri10ge_read_reboot(mgp);
3401                 netdev_err(mgp->dev, "NIC rebooted (0x%x),%s resetting\n",
3402                            reboot, myri10ge_reset_recover ? "" : " not");
3403                 if (myri10ge_reset_recover == 0)
3404                         return;
3405                 rtnl_lock();
3406                 mgp->rebooted = 1;
3407                 rebooted = 1;
3408                 myri10ge_close(mgp->dev);
3409                 myri10ge_reset_recover--;
3410                 mgp->rebooted = 0;
3411                 /*
3412                  * A rebooted nic will come back with config space as
3413                  * it was after power was applied to PCIe bus.
3414                  * Attempt to restore config space which was saved
3415                  * when the driver was loaded, or the last time the
3416                  * nic was resumed from power saving mode.
3417                  */
3418                 pci_restore_state(mgp->pdev);
3419
3420                 /* save state again for accounting reasons */
3421                 pci_save_state(mgp->pdev);
3422
3423         } else {
3424                 /* if we get back -1's from our slot, perhaps somebody
3425                  * powered off our card.  Don't try to reset it in
3426                  * this case */
3427                 if (cmd == 0xffff) {
3428                         pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3429                         if (vendor == 0xffff) {
3430                                 netdev_err(mgp->dev, "device disappeared!\n");
3431                                 return;
3432                         }
3433                 }
3434                 /* Perhaps it is a software error. See if stuck slice
3435                  * has recovered, reset if not */
3436                 rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3437                 for (i = 0; i < mgp->num_slices; i++) {
3438                         ss = mgp->ss;
3439                         if (ss->stuck) {
3440                                 myri10ge_check_slice(ss, &reset_needed,
3441                                                      &busy_slice_cnt,
3442                                                      rx_pause_cnt);
3443                                 ss->stuck = 0;
3444                         }
3445                 }
3446                 if (!reset_needed) {
3447                         netdev_dbg(mgp->dev, "not resetting\n");
3448                         return;
3449                 }
3450
3451                 netdev_err(mgp->dev, "device timeout, resetting\n");
3452         }
3453
3454         if (!rebooted) {
3455                 rtnl_lock();
3456                 myri10ge_close(mgp->dev);
3457         }
3458         status = myri10ge_load_firmware(mgp, 1);
3459         if (status != 0)
3460                 netdev_err(mgp->dev, "failed to load firmware\n");
3461         else
3462                 myri10ge_open(mgp->dev);
3463         rtnl_unlock();
3464 }
3465
3466 /*
3467  * We use our own timer routine rather than relying upon
3468  * netdev->tx_timeout because we have a very large hardware transmit
3469  * queue.  Due to the large queue, the netdev->tx_timeout function
3470  * cannot detect a NIC with a parity error in a timely fashion if the
3471  * NIC is lightly loaded.
3472  */
3473 static void myri10ge_watchdog_timer(struct timer_list *t)
3474 {
3475         struct myri10ge_priv *mgp;
3476         struct myri10ge_slice_state *ss;
3477         int i, reset_needed, busy_slice_cnt;
3478         u32 rx_pause_cnt;
3479         u16 cmd;
3480
3481         mgp = from_timer(mgp, t, watchdog_timer);
3482
3483         rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3484         busy_slice_cnt = 0;
3485         for (i = 0, reset_needed = 0;
3486              i < mgp->num_slices && reset_needed == 0; ++i) {
3487
3488                 ss = &mgp->ss[i];
3489                 if (ss->rx_small.watchdog_needed) {
3490                         myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
3491                                                 mgp->small_bytes + MXGEFW_PAD,
3492                                                 1);
3493                         if (ss->rx_small.fill_cnt - ss->rx_small.cnt >=
3494                             myri10ge_fill_thresh)
3495                                 ss->rx_small.watchdog_needed = 0;
3496                 }
3497                 if (ss->rx_big.watchdog_needed) {
3498                         myri10ge_alloc_rx_pages(mgp, &ss->rx_big,
3499                                                 mgp->big_bytes, 1);
3500                         if (ss->rx_big.fill_cnt - ss->rx_big.cnt >=
3501                             myri10ge_fill_thresh)
3502                                 ss->rx_big.watchdog_needed = 0;
3503                 }
3504                 myri10ge_check_slice(ss, &reset_needed, &busy_slice_cnt,
3505                                      rx_pause_cnt);
3506         }
3507         /* if we've sent or received no traffic, poll the NIC to
3508          * ensure it is still there.  Otherwise, we risk not noticing
3509          * an error in a timely fashion */
3510         if (busy_slice_cnt == 0) {
3511                 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3512                 if ((cmd & PCI_COMMAND_MASTER) == 0) {
3513                         reset_needed = 1;
3514                 }
3515         }
3516         mgp->watchdog_pause = rx_pause_cnt;
3517
3518         if (reset_needed) {
3519                 schedule_work(&mgp->watchdog_work);
3520         } else {
3521                 /* rearm timer */
3522                 mod_timer(&mgp->watchdog_timer,
3523                           jiffies + myri10ge_watchdog_timeout * HZ);
3524         }
3525 }
3526
3527 static void myri10ge_free_slices(struct myri10ge_priv *mgp)
3528 {
3529         struct myri10ge_slice_state *ss;
3530         struct pci_dev *pdev = mgp->pdev;
3531         size_t bytes;
3532         int i;
3533
3534         if (mgp->ss == NULL)
3535                 return;
3536
3537         for (i = 0; i < mgp->num_slices; i++) {
3538                 ss = &mgp->ss[i];
3539                 if (ss->rx_done.entry != NULL) {
3540                         bytes = mgp->max_intr_slots *
3541                             sizeof(*ss->rx_done.entry);
3542                         dma_free_coherent(&pdev->dev, bytes,
3543                                           ss->rx_done.entry, ss->rx_done.bus);
3544                         ss->rx_done.entry = NULL;
3545                 }
3546                 if (ss->fw_stats != NULL) {
3547                         bytes = sizeof(*ss->fw_stats);
3548                         dma_free_coherent(&pdev->dev, bytes,
3549                                           ss->fw_stats, ss->fw_stats_bus);
3550                         ss->fw_stats = NULL;
3551                 }
3552                 __netif_napi_del(&ss->napi);
3553         }
3554         /* Wait till napi structs are no longer used, and then free ss. */
3555         synchronize_net();
3556         kfree(mgp->ss);
3557         mgp->ss = NULL;
3558 }
3559
3560 static int myri10ge_alloc_slices(struct myri10ge_priv *mgp)
3561 {
3562         struct myri10ge_slice_state *ss;
3563         struct pci_dev *pdev = mgp->pdev;
3564         size_t bytes;
3565         int i;
3566
3567         bytes = sizeof(*mgp->ss) * mgp->num_slices;
3568         mgp->ss = kzalloc(bytes, GFP_KERNEL);
3569         if (mgp->ss == NULL) {
3570                 return -ENOMEM;
3571         }
3572
3573         for (i = 0; i < mgp->num_slices; i++) {
3574                 ss = &mgp->ss[i];
3575                 bytes = mgp->max_intr_slots * sizeof(*ss->rx_done.entry);
3576                 ss->rx_done.entry = dma_alloc_coherent(&pdev->dev, bytes,
3577                                                        &ss->rx_done.bus,
3578                                                        GFP_KERNEL);
3579                 if (ss->rx_done.entry == NULL)
3580                         goto abort;
3581                 bytes = sizeof(*ss->fw_stats);
3582                 ss->fw_stats = dma_alloc_coherent(&pdev->dev, bytes,
3583                                                   &ss->fw_stats_bus,
3584                                                   GFP_KERNEL);
3585                 if (ss->fw_stats == NULL)
3586                         goto abort;
3587                 ss->mgp = mgp;
3588                 ss->dev = mgp->dev;
3589                 netif_napi_add(ss->dev, &ss->napi, myri10ge_poll,
3590                                myri10ge_napi_weight);
3591         }
3592         return 0;
3593 abort:
3594         myri10ge_free_slices(mgp);
3595         return -ENOMEM;
3596 }
3597
3598 /*
3599  * This function determines the number of slices supported.
3600  * The number slices is the minimum of the number of CPUS,
3601  * the number of MSI-X irqs supported, the number of slices
3602  * supported by the firmware
3603  */
3604 static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
3605 {
3606         struct myri10ge_cmd cmd;
3607         struct pci_dev *pdev = mgp->pdev;
3608         char *old_fw;
3609         bool old_allocated;
3610         int i, status, ncpus;
3611
3612         mgp->num_slices = 1;
3613         ncpus = netif_get_num_default_rss_queues();
3614
3615         if (myri10ge_max_slices == 1 || !pdev->msix_cap ||
3616             (myri10ge_max_slices == -1 && ncpus < 2))
3617                 return;
3618
3619         /* try to load the slice aware rss firmware */
3620         old_fw = mgp->fw_name;
3621         old_allocated = mgp->fw_name_allocated;
3622         /* don't free old_fw if we override it. */
3623         mgp->fw_name_allocated = false;
3624
3625         if (myri10ge_fw_name != NULL) {
3626                 dev_info(&mgp->pdev->dev, "overriding rss firmware to %s\n",
3627                          myri10ge_fw_name);
3628                 set_fw_name(mgp, myri10ge_fw_name, false);
3629         } else if (old_fw == myri10ge_fw_aligned)
3630                 set_fw_name(mgp, myri10ge_fw_rss_aligned, false);
3631         else
3632                 set_fw_name(mgp, myri10ge_fw_rss_unaligned, false);
3633         status = myri10ge_load_firmware(mgp, 0);
3634         if (status != 0) {
3635                 dev_info(&pdev->dev, "Rss firmware not found\n");
3636                 if (old_allocated)
3637                         kfree(old_fw);
3638                 return;
3639         }
3640
3641         /* hit the board with a reset to ensure it is alive */
3642         memset(&cmd, 0, sizeof(cmd));
3643         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
3644         if (status != 0) {
3645                 dev_err(&mgp->pdev->dev, "failed reset\n");
3646                 goto abort_with_fw;
3647         }
3648
3649         mgp->max_intr_slots = cmd.data0 / sizeof(struct mcp_slot);
3650
3651         /* tell it the size of the interrupt queues */
3652         cmd.data0 = mgp->max_intr_slots * sizeof(struct mcp_slot);
3653         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
3654         if (status != 0) {
3655                 dev_err(&mgp->pdev->dev, "failed MXGEFW_CMD_SET_INTRQ_SIZE\n");
3656                 goto abort_with_fw;
3657         }
3658
3659         /* ask the maximum number of slices it supports */
3660         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES, &cmd, 0);
3661         if (status != 0)
3662                 goto abort_with_fw;
3663         else
3664                 mgp->num_slices = cmd.data0;
3665
3666         /* Only allow multiple slices if MSI-X is usable */
3667         if (!myri10ge_msi) {
3668                 goto abort_with_fw;
3669         }
3670
3671         /* if the admin did not specify a limit to how many
3672          * slices we should use, cap it automatically to the
3673          * number of CPUs currently online */
3674         if (myri10ge_max_slices == -1)
3675                 myri10ge_max_slices = ncpus;
3676
3677         if (mgp->num_slices > myri10ge_max_slices)
3678                 mgp->num_slices = myri10ge_max_slices;
3679
3680         /* Now try to allocate as many MSI-X vectors as we have
3681          * slices. We give up on MSI-X if we can only get a single
3682          * vector. */
3683
3684         mgp->msix_vectors = kcalloc(mgp->num_slices, sizeof(*mgp->msix_vectors),
3685                                     GFP_KERNEL);
3686         if (mgp->msix_vectors == NULL)
3687                 goto no_msix;
3688         for (i = 0; i < mgp->num_slices; i++) {
3689                 mgp->msix_vectors[i].entry = i;
3690         }
3691
3692         while (mgp->num_slices > 1) {
3693                 mgp->num_slices = rounddown_pow_of_two(mgp->num_slices);
3694                 if (mgp->num_slices == 1)
3695                         goto no_msix;
3696                 status = pci_enable_msix_range(pdev,
3697                                                mgp->msix_vectors,
3698                                                mgp->num_slices,
3699                                                mgp->num_slices);
3700                 if (status < 0)
3701                         goto no_msix;
3702
3703                 pci_disable_msix(pdev);
3704
3705                 if (status == mgp->num_slices) {
3706                         if (old_allocated)
3707                                 kfree(old_fw);
3708                         return;
3709                 } else {
3710                         mgp->num_slices = status;
3711                 }
3712         }
3713
3714 no_msix:
3715         if (mgp->msix_vectors != NULL) {
3716                 kfree(mgp->msix_vectors);
3717                 mgp->msix_vectors = NULL;
3718         }
3719
3720 abort_with_fw:
3721         mgp->num_slices = 1;
3722         set_fw_name(mgp, old_fw, old_allocated);
3723         myri10ge_load_firmware(mgp, 0);
3724 }
3725
3726 static const struct net_device_ops myri10ge_netdev_ops = {
3727         .ndo_open               = myri10ge_open,
3728         .ndo_stop               = myri10ge_close,
3729         .ndo_start_xmit         = myri10ge_xmit,
3730         .ndo_get_stats64        = myri10ge_get_stats,
3731         .ndo_validate_addr      = eth_validate_addr,
3732         .ndo_change_mtu         = myri10ge_change_mtu,
3733         .ndo_set_rx_mode        = myri10ge_set_multicast_list,
3734         .ndo_set_mac_address    = myri10ge_set_mac_address,
3735 };
3736
3737 static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3738 {
3739         struct net_device *netdev;
3740         struct myri10ge_priv *mgp;
3741         struct device *dev = &pdev->dev;
3742         int status = -ENXIO;
3743         unsigned hdr_offset, ss_offset;
3744         static int board_number;
3745
3746         netdev = alloc_etherdev_mq(sizeof(*mgp), MYRI10GE_MAX_SLICES);
3747         if (netdev == NULL)
3748                 return -ENOMEM;
3749
3750         SET_NETDEV_DEV(netdev, &pdev->dev);
3751
3752         mgp = netdev_priv(netdev);
3753         mgp->dev = netdev;
3754         mgp->pdev = pdev;
3755         mgp->pause = myri10ge_flow_control;
3756         mgp->intr_coal_delay = myri10ge_intr_coal_delay;
3757         mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT);
3758         mgp->board_number = board_number;
3759         init_waitqueue_head(&mgp->down_wq);
3760
3761         if (pci_enable_device(pdev)) {
3762                 dev_err(&pdev->dev, "pci_enable_device call failed\n");
3763                 status = -ENODEV;
3764                 goto abort_with_netdev;
3765         }
3766
3767         /* Find the vendor-specific cap so we can check
3768          * the reboot register later on */
3769         mgp->vendor_specific_offset
3770             = pci_find_capability(pdev, PCI_CAP_ID_VNDR);
3771
3772         /* Set our max read request to 4KB */
3773         status = pcie_set_readrq(pdev, 4096);
3774         if (status != 0) {
3775                 dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n",
3776                         status);
3777                 goto abort_with_enabled;
3778         }
3779
3780         myri10ge_mask_surprise_down(pdev);
3781         pci_set_master(pdev);
3782         status = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
3783         if (status != 0) {
3784                 dev_err(&pdev->dev, "Error %d setting DMA mask\n", status);
3785                 goto abort_with_enabled;
3786         }
3787         mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd),
3788                                       &mgp->cmd_bus, GFP_KERNEL);
3789         if (!mgp->cmd) {
3790                 status = -ENOMEM;
3791                 goto abort_with_enabled;
3792         }
3793
3794         mgp->board_span = pci_resource_len(pdev, 0);
3795         mgp->iomem_base = pci_resource_start(pdev, 0);
3796         mgp->wc_cookie = arch_phys_wc_add(mgp->iomem_base, mgp->board_span);
3797         mgp->sram = ioremap_wc(mgp->iomem_base, mgp->board_span);
3798         if (mgp->sram == NULL) {
3799                 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n",
3800                         mgp->board_span, mgp->iomem_base);
3801                 status = -ENXIO;
3802                 goto abort_with_mtrr;
3803         }
3804         hdr_offset =
3805             swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET)) & 0xffffc;
3806         ss_offset = hdr_offset + offsetof(struct mcp_gen_header, string_specs);
3807         mgp->sram_size = swab32(readl(mgp->sram + ss_offset));
3808         if (mgp->sram_size > mgp->board_span ||
3809             mgp->sram_size <= MYRI10GE_FW_OFFSET) {
3810                 dev_err(&pdev->dev,
3811                         "invalid sram_size %dB or board span %ldB\n",
3812                         mgp->sram_size, mgp->board_span);
3813                 status = -EINVAL;
3814                 goto abort_with_ioremap;
3815         }
3816         memcpy_fromio(mgp->eeprom_strings,
3817                       mgp->sram + mgp->sram_size, MYRI10GE_EEPROM_STRINGS_SIZE);
3818         memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2);
3819         status = myri10ge_read_mac_addr(mgp);
3820         if (status)
3821                 goto abort_with_ioremap;
3822
3823         eth_hw_addr_set(netdev, mgp->mac_addr);
3824
3825         myri10ge_select_firmware(mgp);
3826
3827         status = myri10ge_load_firmware(mgp, 1);
3828         if (status != 0) {
3829                 dev_err(&pdev->dev, "failed to load firmware\n");
3830                 goto abort_with_ioremap;
3831         }
3832         myri10ge_probe_slices(mgp);
3833         status = myri10ge_alloc_slices(mgp);
3834         if (status != 0) {
3835                 dev_err(&pdev->dev, "failed to alloc slice state\n");
3836                 goto abort_with_firmware;
3837         }
3838         netif_set_real_num_tx_queues(netdev, mgp->num_slices);
3839         netif_set_real_num_rx_queues(netdev, mgp->num_slices);
3840         status = myri10ge_reset(mgp);
3841         if (status != 0) {
3842                 dev_err(&pdev->dev, "failed reset\n");
3843                 goto abort_with_slices;
3844         }
3845 #ifdef CONFIG_MYRI10GE_DCA
3846         myri10ge_setup_dca(mgp);
3847 #endif
3848         pci_set_drvdata(pdev, mgp);
3849
3850         /* MTU range: 68 - 9000 */
3851         netdev->min_mtu = ETH_MIN_MTU;
3852         netdev->max_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
3853
3854         if (myri10ge_initial_mtu > netdev->max_mtu)
3855                 myri10ge_initial_mtu = netdev->max_mtu;
3856         if (myri10ge_initial_mtu < netdev->min_mtu)
3857                 myri10ge_initial_mtu = netdev->min_mtu;
3858
3859         netdev->mtu = myri10ge_initial_mtu;
3860
3861         netdev->netdev_ops = &myri10ge_netdev_ops;
3862         netdev->hw_features = mgp->features | NETIF_F_RXCSUM;
3863
3864         /* fake NETIF_F_HW_VLAN_CTAG_RX for good GRO performance */
3865         netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
3866
3867         netdev->features = netdev->hw_features | NETIF_F_HIGHDMA;
3868
3869         netdev->vlan_features |= mgp->features;
3870         if (mgp->fw_ver_tiny < 37)
3871                 netdev->vlan_features &= ~NETIF_F_TSO6;
3872         if (mgp->fw_ver_tiny < 32)
3873                 netdev->vlan_features &= ~NETIF_F_TSO;
3874
3875         /* make sure we can get an irq, and that MSI can be
3876          * setup (if available). */
3877         status = myri10ge_request_irq(mgp);
3878         if (status != 0)
3879                 goto abort_with_slices;
3880         myri10ge_free_irq(mgp);
3881
3882         /* Save configuration space to be restored if the
3883          * nic resets due to a parity error */
3884         pci_save_state(pdev);
3885
3886         /* Setup the watchdog timer */
3887         timer_setup(&mgp->watchdog_timer, myri10ge_watchdog_timer, 0);
3888
3889         netdev->ethtool_ops = &myri10ge_ethtool_ops;
3890         INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog);
3891         status = register_netdev(netdev);
3892         if (status != 0) {
3893                 dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
3894                 goto abort_with_state;
3895         }
3896         if (mgp->msix_enabled)
3897                 dev_info(dev, "%d MSI-X IRQs, tx bndry %d, fw %s, MTRR %s, WC Enabled\n",
3898                          mgp->num_slices, mgp->tx_boundary, mgp->fw_name,
3899                          (mgp->wc_cookie > 0 ? "Enabled" : "Disabled"));
3900         else
3901                 dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, MTRR %s, WC Enabled\n",
3902                          mgp->msi_enabled ? "MSI" : "xPIC",
3903                          pdev->irq, mgp->tx_boundary, mgp->fw_name,
3904                          (mgp->wc_cookie > 0 ? "Enabled" : "Disabled"));
3905
3906         board_number++;
3907         return 0;
3908
3909 abort_with_state:
3910         pci_restore_state(pdev);
3911
3912 abort_with_slices:
3913         myri10ge_free_slices(mgp);
3914
3915 abort_with_firmware:
3916         myri10ge_dummy_rdma(mgp, 0);
3917
3918 abort_with_ioremap:
3919         if (mgp->mac_addr_string != NULL)
3920                 dev_err(&pdev->dev,
3921                         "myri10ge_probe() failed: MAC=%s, SN=%ld\n",
3922                         mgp->mac_addr_string, mgp->serial_number);
3923         iounmap(mgp->sram);
3924
3925 abort_with_mtrr:
3926         arch_phys_wc_del(mgp->wc_cookie);
3927         dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
3928                           mgp->cmd, mgp->cmd_bus);
3929
3930 abort_with_enabled:
3931         pci_disable_device(pdev);
3932
3933 abort_with_netdev:
3934         set_fw_name(mgp, NULL, false);
3935         free_netdev(netdev);
3936         return status;
3937 }
3938
3939 /*
3940  * myri10ge_remove
3941  *
3942  * Does what is necessary to shutdown one Myrinet device. Called
3943  *   once for each Myrinet card by the kernel when a module is
3944  *   unloaded.
3945  */
3946 static void myri10ge_remove(struct pci_dev *pdev)
3947 {
3948         struct myri10ge_priv *mgp;
3949         struct net_device *netdev;
3950
3951         mgp = pci_get_drvdata(pdev);
3952         if (mgp == NULL)
3953                 return;
3954
3955         cancel_work_sync(&mgp->watchdog_work);
3956         netdev = mgp->dev;
3957         unregister_netdev(netdev);
3958
3959 #ifdef CONFIG_MYRI10GE_DCA
3960         myri10ge_teardown_dca(mgp);
3961 #endif
3962         myri10ge_dummy_rdma(mgp, 0);
3963
3964         /* avoid a memory leak */
3965         pci_restore_state(pdev);
3966
3967         iounmap(mgp->sram);
3968         arch_phys_wc_del(mgp->wc_cookie);
3969         myri10ge_free_slices(mgp);
3970         kfree(mgp->msix_vectors);
3971         dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
3972                           mgp->cmd, mgp->cmd_bus);
3973
3974         set_fw_name(mgp, NULL, false);
3975         free_netdev(netdev);
3976         pci_disable_device(pdev);
3977 }
3978
3979 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E      0x0008
3980 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9    0x0009
3981
3982 static const struct pci_device_id myri10ge_pci_tbl[] = {
3983         {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)},
3984         {PCI_DEVICE
3985          (PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9)},
3986         {0},
3987 };
3988
3989 MODULE_DEVICE_TABLE(pci, myri10ge_pci_tbl);
3990
3991 static SIMPLE_DEV_PM_OPS(myri10ge_pm_ops, myri10ge_suspend, myri10ge_resume);
3992
3993 static struct pci_driver myri10ge_driver = {
3994         .name = "myri10ge",
3995         .probe = myri10ge_probe,
3996         .remove = myri10ge_remove,
3997         .id_table = myri10ge_pci_tbl,
3998         .driver.pm = &myri10ge_pm_ops,
3999 };
4000
4001 #ifdef CONFIG_MYRI10GE_DCA
4002 static int
4003 myri10ge_notify_dca(struct notifier_block *nb, unsigned long event, void *p)
4004 {
4005         int err = driver_for_each_device(&myri10ge_driver.driver,
4006                                          NULL, &event,
4007                                          myri10ge_notify_dca_device);
4008
4009         if (err)
4010                 return NOTIFY_BAD;
4011         return NOTIFY_DONE;
4012 }
4013
4014 static struct notifier_block myri10ge_dca_notifier = {
4015         .notifier_call = myri10ge_notify_dca,
4016         .next = NULL,
4017         .priority = 0,
4018 };
4019 #endif                          /* CONFIG_MYRI10GE_DCA */
4020
4021 static __init int myri10ge_init_module(void)
4022 {
4023         pr_info("Version %s\n", MYRI10GE_VERSION_STR);
4024
4025         if (myri10ge_rss_hash > MXGEFW_RSS_HASH_TYPE_MAX) {
4026                 pr_err("Illegal rssh hash type %d, defaulting to source port\n",
4027                        myri10ge_rss_hash);
4028                 myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT;
4029         }
4030 #ifdef CONFIG_MYRI10GE_DCA
4031         dca_register_notify(&myri10ge_dca_notifier);
4032 #endif
4033         if (myri10ge_max_slices > MYRI10GE_MAX_SLICES)
4034                 myri10ge_max_slices = MYRI10GE_MAX_SLICES;
4035
4036         return pci_register_driver(&myri10ge_driver);
4037 }
4038
4039 module_init(myri10ge_init_module);
4040
4041 static __exit void myri10ge_cleanup_module(void)
4042 {
4043 #ifdef CONFIG_MYRI10GE_DCA
4044         dca_unregister_notify(&myri10ge_dca_notifier);
4045 #endif
4046         pci_unregister_driver(&myri10ge_driver);
4047 }
4048
4049 module_exit(myri10ge_cleanup_module);