netdev: convert bulk of drivers to netdev_tx_t
[linux-2.6.git] / drivers / net / myri10ge / myri10ge.c
1 /*************************************************************************
2  * myri10ge.c: Myricom Myri-10G Ethernet driver.
3  *
4  * Copyright (C) 2005 - 2009 Myricom, Inc.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. Neither the name of Myricom, Inc. nor the names of its contributors
16  *    may be used to endorse or promote products derived from this software
17  *    without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
23  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29  * POSSIBILITY OF SUCH DAMAGE.
30  *
31  *
32  * If the eeprom on your board is not recent enough, you will need to get a
33  * newer firmware image at:
34  *   http://www.myri.com/scs/download-Myri10GE.html
35  *
36  * Contact Information:
37  *   <help@myri.com>
38  *   Myricom, Inc., 325N Santa Anita Avenue, Arcadia, CA 91006
39  *************************************************************************/
40
41 #include <linux/tcp.h>
42 #include <linux/netdevice.h>
43 #include <linux/skbuff.h>
44 #include <linux/string.h>
45 #include <linux/module.h>
46 #include <linux/pci.h>
47 #include <linux/dma-mapping.h>
48 #include <linux/etherdevice.h>
49 #include <linux/if_ether.h>
50 #include <linux/if_vlan.h>
51 #include <linux/inet_lro.h>
52 #include <linux/dca.h>
53 #include <linux/ip.h>
54 #include <linux/inet.h>
55 #include <linux/in.h>
56 #include <linux/ethtool.h>
57 #include <linux/firmware.h>
58 #include <linux/delay.h>
59 #include <linux/timer.h>
60 #include <linux/vmalloc.h>
61 #include <linux/crc32.h>
62 #include <linux/moduleparam.h>
63 #include <linux/io.h>
64 #include <linux/log2.h>
65 #include <net/checksum.h>
66 #include <net/ip.h>
67 #include <net/tcp.h>
68 #include <asm/byteorder.h>
69 #include <asm/io.h>
70 #include <asm/processor.h>
71 #ifdef CONFIG_MTRR
72 #include <asm/mtrr.h>
73 #endif
74
75 #include "myri10ge_mcp.h"
76 #include "myri10ge_mcp_gen_header.h"
77
78 #define MYRI10GE_VERSION_STR "1.5.0-1.432"
79
80 MODULE_DESCRIPTION("Myricom 10G driver (10GbE)");
81 MODULE_AUTHOR("Maintainer: help@myri.com");
82 MODULE_VERSION(MYRI10GE_VERSION_STR);
83 MODULE_LICENSE("Dual BSD/GPL");
84
85 #define MYRI10GE_MAX_ETHER_MTU 9014
86
87 #define MYRI10GE_ETH_STOPPED 0
88 #define MYRI10GE_ETH_STOPPING 1
89 #define MYRI10GE_ETH_STARTING 2
90 #define MYRI10GE_ETH_RUNNING 3
91 #define MYRI10GE_ETH_OPEN_FAILED 4
92
93 #define MYRI10GE_EEPROM_STRINGS_SIZE 256
94 #define MYRI10GE_MAX_SEND_DESC_TSO ((65536 / 2048) * 2)
95 #define MYRI10GE_MAX_LRO_DESCRIPTORS 8
96 #define MYRI10GE_LRO_MAX_PKTS 64
97
98 #define MYRI10GE_NO_CONFIRM_DATA htonl(0xffffffff)
99 #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff
100
101 #define MYRI10GE_ALLOC_ORDER 0
102 #define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE)
103 #define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1)
104
105 #define MYRI10GE_MAX_SLICES 32
106
107 struct myri10ge_rx_buffer_state {
108         struct page *page;
109         int page_offset;
110          DECLARE_PCI_UNMAP_ADDR(bus)
111          DECLARE_PCI_UNMAP_LEN(len)
112 };
113
114 struct myri10ge_tx_buffer_state {
115         struct sk_buff *skb;
116         int last;
117          DECLARE_PCI_UNMAP_ADDR(bus)
118          DECLARE_PCI_UNMAP_LEN(len)
119 };
120
121 struct myri10ge_cmd {
122         u32 data0;
123         u32 data1;
124         u32 data2;
125 };
126
127 struct myri10ge_rx_buf {
128         struct mcp_kreq_ether_recv __iomem *lanai;      /* lanai ptr for recv ring */
129         struct mcp_kreq_ether_recv *shadow;     /* host shadow of recv ring */
130         struct myri10ge_rx_buffer_state *info;
131         struct page *page;
132         dma_addr_t bus;
133         int page_offset;
134         int cnt;
135         int fill_cnt;
136         int alloc_fail;
137         int mask;               /* number of rx slots -1 */
138         int watchdog_needed;
139 };
140
141 struct myri10ge_tx_buf {
142         struct mcp_kreq_ether_send __iomem *lanai;      /* lanai ptr for sendq */
143         __be32 __iomem *send_go;        /* "go" doorbell ptr */
144         __be32 __iomem *send_stop;      /* "stop" doorbell ptr */
145         struct mcp_kreq_ether_send *req_list;   /* host shadow of sendq */
146         char *req_bytes;
147         struct myri10ge_tx_buffer_state *info;
148         int mask;               /* number of transmit slots -1  */
149         int req ____cacheline_aligned;  /* transmit slots submitted     */
150         int pkt_start;          /* packets started */
151         int stop_queue;
152         int linearized;
153         int done ____cacheline_aligned; /* transmit slots completed     */
154         int pkt_done;           /* packets completed */
155         int wake_queue;
156         int queue_active;
157 };
158
159 struct myri10ge_rx_done {
160         struct mcp_slot *entry;
161         dma_addr_t bus;
162         int cnt;
163         int idx;
164         struct net_lro_mgr lro_mgr;
165         struct net_lro_desc lro_desc[MYRI10GE_MAX_LRO_DESCRIPTORS];
166 };
167
168 struct myri10ge_slice_netstats {
169         unsigned long rx_packets;
170         unsigned long tx_packets;
171         unsigned long rx_bytes;
172         unsigned long tx_bytes;
173         unsigned long rx_dropped;
174         unsigned long tx_dropped;
175 };
176
177 struct myri10ge_slice_state {
178         struct myri10ge_tx_buf tx;      /* transmit ring        */
179         struct myri10ge_rx_buf rx_small;
180         struct myri10ge_rx_buf rx_big;
181         struct myri10ge_rx_done rx_done;
182         struct net_device *dev;
183         struct napi_struct napi;
184         struct myri10ge_priv *mgp;
185         struct myri10ge_slice_netstats stats;
186         __be32 __iomem *irq_claim;
187         struct mcp_irq_data *fw_stats;
188         dma_addr_t fw_stats_bus;
189         int watchdog_tx_done;
190         int watchdog_tx_req;
191         int watchdog_rx_done;
192 #ifdef CONFIG_MYRI10GE_DCA
193         int cached_dca_tag;
194         int cpu;
195         __be32 __iomem *dca_tag;
196 #endif
197         char irq_desc[32];
198 };
199
200 struct myri10ge_priv {
201         struct myri10ge_slice_state *ss;
202         int tx_boundary;        /* boundary transmits cannot cross */
203         int num_slices;
204         int running;            /* running?             */
205         int csum_flag;          /* rx_csums?            */
206         int small_bytes;
207         int big_bytes;
208         int max_intr_slots;
209         struct net_device *dev;
210         struct net_device_stats stats;
211         spinlock_t stats_lock;
212         u8 __iomem *sram;
213         int sram_size;
214         unsigned long board_span;
215         unsigned long iomem_base;
216         __be32 __iomem *irq_deassert;
217         char *mac_addr_string;
218         struct mcp_cmd_response *cmd;
219         dma_addr_t cmd_bus;
220         struct pci_dev *pdev;
221         int msi_enabled;
222         int msix_enabled;
223         struct msix_entry *msix_vectors;
224 #ifdef CONFIG_MYRI10GE_DCA
225         int dca_enabled;
226 #endif
227         u32 link_state;
228         unsigned int rdma_tags_available;
229         int intr_coal_delay;
230         __be32 __iomem *intr_coal_delay_ptr;
231         int mtrr;
232         int wc_enabled;
233         int down_cnt;
234         wait_queue_head_t down_wq;
235         struct work_struct watchdog_work;
236         struct timer_list watchdog_timer;
237         int watchdog_resets;
238         int watchdog_pause;
239         int pause;
240         char *fw_name;
241         char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
242         char *product_code_string;
243         char fw_version[128];
244         int fw_ver_major;
245         int fw_ver_minor;
246         int fw_ver_tiny;
247         int adopted_rx_filter_bug;
248         u8 mac_addr[6];         /* eeprom mac address */
249         unsigned long serial_number;
250         int vendor_specific_offset;
251         int fw_multicast_support;
252         unsigned long features;
253         u32 max_tso6;
254         u32 read_dma;
255         u32 write_dma;
256         u32 read_write_dma;
257         u32 link_changes;
258         u32 msg_enable;
259         unsigned int board_number;
260         int rebooted;
261 };
262
263 static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
264 static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
265 static char *myri10ge_fw_rss_unaligned = "myri10ge_rss_ethp_z8e.dat";
266 static char *myri10ge_fw_rss_aligned = "myri10ge_rss_eth_z8e.dat";
267
268 static char *myri10ge_fw_name = NULL;
269 module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR);
270 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name");
271
272 #define MYRI10GE_MAX_BOARDS 8
273 static char *myri10ge_fw_names[MYRI10GE_MAX_BOARDS] =
274     {[0 ... (MYRI10GE_MAX_BOARDS - 1)] = NULL };
275 module_param_array_named(myri10ge_fw_names, myri10ge_fw_names, charp, NULL,
276                          0444);
277 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image names per board");
278
279 static int myri10ge_ecrc_enable = 1;
280 module_param(myri10ge_ecrc_enable, int, S_IRUGO);
281 MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E");
282
283 static int myri10ge_small_bytes = -1;   /* -1 == auto */
284 module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR);
285 MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets");
286
287 static int myri10ge_msi = 1;    /* enable msi by default */
288 module_param(myri10ge_msi, int, S_IRUGO | S_IWUSR);
289 MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts");
290
291 static int myri10ge_intr_coal_delay = 75;
292 module_param(myri10ge_intr_coal_delay, int, S_IRUGO);
293 MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay");
294
295 static int myri10ge_flow_control = 1;
296 module_param(myri10ge_flow_control, int, S_IRUGO);
297 MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter");
298
299 static int myri10ge_deassert_wait = 1;
300 module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR);
301 MODULE_PARM_DESC(myri10ge_deassert_wait,
302                  "Wait when deasserting legacy interrupts");
303
304 static int myri10ge_force_firmware = 0;
305 module_param(myri10ge_force_firmware, int, S_IRUGO);
306 MODULE_PARM_DESC(myri10ge_force_firmware,
307                  "Force firmware to assume aligned completions");
308
309 static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
310 module_param(myri10ge_initial_mtu, int, S_IRUGO);
311 MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU");
312
313 static int myri10ge_napi_weight = 64;
314 module_param(myri10ge_napi_weight, int, S_IRUGO);
315 MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight");
316
317 static int myri10ge_watchdog_timeout = 1;
318 module_param(myri10ge_watchdog_timeout, int, S_IRUGO);
319 MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout");
320
321 static int myri10ge_max_irq_loops = 1048576;
322 module_param(myri10ge_max_irq_loops, int, S_IRUGO);
323 MODULE_PARM_DESC(myri10ge_max_irq_loops,
324                  "Set stuck legacy IRQ detection threshold");
325
326 #define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK
327
328 static int myri10ge_debug = -1; /* defaults above */
329 module_param(myri10ge_debug, int, 0);
330 MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)");
331
332 static int myri10ge_lro_max_pkts = MYRI10GE_LRO_MAX_PKTS;
333 module_param(myri10ge_lro_max_pkts, int, S_IRUGO);
334 MODULE_PARM_DESC(myri10ge_lro_max_pkts,
335                  "Number of LRO packets to be aggregated");
336
337 static int myri10ge_fill_thresh = 256;
338 module_param(myri10ge_fill_thresh, int, S_IRUGO | S_IWUSR);
339 MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed");
340
341 static int myri10ge_reset_recover = 1;
342
343 static int myri10ge_max_slices = 1;
344 module_param(myri10ge_max_slices, int, S_IRUGO);
345 MODULE_PARM_DESC(myri10ge_max_slices, "Max tx/rx queues");
346
347 static int myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT;
348 module_param(myri10ge_rss_hash, int, S_IRUGO);
349 MODULE_PARM_DESC(myri10ge_rss_hash, "Type of RSS hashing to do");
350
351 static int myri10ge_dca = 1;
352 module_param(myri10ge_dca, int, S_IRUGO);
353 MODULE_PARM_DESC(myri10ge_dca, "Enable DCA if possible");
354
355 #define MYRI10GE_FW_OFFSET 1024*1024
356 #define MYRI10GE_HIGHPART_TO_U32(X) \
357 (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0)
358 #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X))
359
360 #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8)
361
362 static void myri10ge_set_multicast_list(struct net_device *dev);
363 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
364                                          struct net_device *dev);
365
366 static inline void put_be32(__be32 val, __be32 __iomem * p)
367 {
368         __raw_writel((__force __u32) val, (__force void __iomem *)p);
369 }
370
371 static struct net_device_stats *myri10ge_get_stats(struct net_device *dev);
372
373 static int
374 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
375                   struct myri10ge_cmd *data, int atomic)
376 {
377         struct mcp_cmd *buf;
378         char buf_bytes[sizeof(*buf) + 8];
379         struct mcp_cmd_response *response = mgp->cmd;
380         char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD;
381         u32 dma_low, dma_high, result, value;
382         int sleep_total = 0;
383
384         /* ensure buf is aligned to 8 bytes */
385         buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8);
386
387         buf->data0 = htonl(data->data0);
388         buf->data1 = htonl(data->data1);
389         buf->data2 = htonl(data->data2);
390         buf->cmd = htonl(cmd);
391         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
392         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
393
394         buf->response_addr.low = htonl(dma_low);
395         buf->response_addr.high = htonl(dma_high);
396         response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT);
397         mb();
398         myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf));
399
400         /* wait up to 15ms. Longest command is the DMA benchmark,
401          * which is capped at 5ms, but runs from a timeout handler
402          * that runs every 7.8ms. So a 15ms timeout leaves us with
403          * a 2.2ms margin
404          */
405         if (atomic) {
406                 /* if atomic is set, do not sleep,
407                  * and try to get the completion quickly
408                  * (1ms will be enough for those commands) */
409                 for (sleep_total = 0;
410                      sleep_total < 1000
411                      && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
412                      sleep_total += 10) {
413                         udelay(10);
414                         mb();
415                 }
416         } else {
417                 /* use msleep for most command */
418                 for (sleep_total = 0;
419                      sleep_total < 15
420                      && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
421                      sleep_total++)
422                         msleep(1);
423         }
424
425         result = ntohl(response->result);
426         value = ntohl(response->data);
427         if (result != MYRI10GE_NO_RESPONSE_RESULT) {
428                 if (result == 0) {
429                         data->data0 = value;
430                         return 0;
431                 } else if (result == MXGEFW_CMD_UNKNOWN) {
432                         return -ENOSYS;
433                 } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) {
434                         return -E2BIG;
435                 } else if (result == MXGEFW_CMD_ERROR_RANGE &&
436                            cmd == MXGEFW_CMD_ENABLE_RSS_QUEUES &&
437                            (data->
438                             data1 & MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES) !=
439                            0) {
440                         return -ERANGE;
441                 } else {
442                         dev_err(&mgp->pdev->dev,
443                                 "command %d failed, result = %d\n",
444                                 cmd, result);
445                         return -ENXIO;
446                 }
447         }
448
449         dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
450                 cmd, result);
451         return -EAGAIN;
452 }
453
454 /*
455  * The eeprom strings on the lanaiX have the format
456  * SN=x\0
457  * MAC=x:x:x:x:x:x\0
458  * PT:ddd mmm xx xx:xx:xx xx\0
459  * PV:ddd mmm xx xx:xx:xx xx\0
460  */
461 static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp)
462 {
463         char *ptr, *limit;
464         int i;
465
466         ptr = mgp->eeprom_strings;
467         limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE;
468
469         while (*ptr != '\0' && ptr < limit) {
470                 if (memcmp(ptr, "MAC=", 4) == 0) {
471                         ptr += 4;
472                         mgp->mac_addr_string = ptr;
473                         for (i = 0; i < 6; i++) {
474                                 if ((ptr + 2) > limit)
475                                         goto abort;
476                                 mgp->mac_addr[i] =
477                                     simple_strtoul(ptr, &ptr, 16);
478                                 ptr += 1;
479                         }
480                 }
481                 if (memcmp(ptr, "PC=", 3) == 0) {
482                         ptr += 3;
483                         mgp->product_code_string = ptr;
484                 }
485                 if (memcmp((const void *)ptr, "SN=", 3) == 0) {
486                         ptr += 3;
487                         mgp->serial_number = simple_strtoul(ptr, &ptr, 10);
488                 }
489                 while (ptr < limit && *ptr++) ;
490         }
491
492         return 0;
493
494 abort:
495         dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n");
496         return -ENXIO;
497 }
498
499 /*
500  * Enable or disable periodic RDMAs from the host to make certain
501  * chipsets resend dropped PCIe messages
502  */
503
504 static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable)
505 {
506         char __iomem *submit;
507         __be32 buf[16] __attribute__ ((__aligned__(8)));
508         u32 dma_low, dma_high;
509         int i;
510
511         /* clear confirmation addr */
512         mgp->cmd->data = 0;
513         mb();
514
515         /* send a rdma command to the PCIe engine, and wait for the
516          * response in the confirmation address.  The firmware should
517          * write a -1 there to indicate it is alive and well
518          */
519         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
520         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
521
522         buf[0] = htonl(dma_high);       /* confirm addr MSW */
523         buf[1] = htonl(dma_low);        /* confirm addr LSW */
524         buf[2] = MYRI10GE_NO_CONFIRM_DATA;      /* confirm data */
525         buf[3] = htonl(dma_high);       /* dummy addr MSW */
526         buf[4] = htonl(dma_low);        /* dummy addr LSW */
527         buf[5] = htonl(enable); /* enable? */
528
529         submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA;
530
531         myri10ge_pio_copy(submit, &buf, sizeof(buf));
532         for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++)
533                 msleep(1);
534         if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA)
535                 dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n",
536                         (enable ? "enable" : "disable"));
537 }
538
539 static int
540 myri10ge_validate_firmware(struct myri10ge_priv *mgp,
541                            struct mcp_gen_header *hdr)
542 {
543         struct device *dev = &mgp->pdev->dev;
544
545         /* check firmware type */
546         if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) {
547                 dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type));
548                 return -EINVAL;
549         }
550
551         /* save firmware version for ethtool */
552         strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
553
554         sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major,
555                &mgp->fw_ver_minor, &mgp->fw_ver_tiny);
556
557         if (!(mgp->fw_ver_major == MXGEFW_VERSION_MAJOR
558               && mgp->fw_ver_minor == MXGEFW_VERSION_MINOR)) {
559                 dev_err(dev, "Found firmware version %s\n", mgp->fw_version);
560                 dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR,
561                         MXGEFW_VERSION_MINOR);
562                 return -EINVAL;
563         }
564         return 0;
565 }
566
567 static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
568 {
569         unsigned crc, reread_crc;
570         const struct firmware *fw;
571         struct device *dev = &mgp->pdev->dev;
572         unsigned char *fw_readback;
573         struct mcp_gen_header *hdr;
574         size_t hdr_offset;
575         int status;
576         unsigned i;
577
578         if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) {
579                 dev_err(dev, "Unable to load %s firmware image via hotplug\n",
580                         mgp->fw_name);
581                 status = -EINVAL;
582                 goto abort_with_nothing;
583         }
584
585         /* check size */
586
587         if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET ||
588             fw->size < MCP_HEADER_PTR_OFFSET + 4) {
589                 dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size);
590                 status = -EINVAL;
591                 goto abort_with_fw;
592         }
593
594         /* check id */
595         hdr_offset = ntohl(*(__be32 *) (fw->data + MCP_HEADER_PTR_OFFSET));
596         if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) {
597                 dev_err(dev, "Bad firmware file\n");
598                 status = -EINVAL;
599                 goto abort_with_fw;
600         }
601         hdr = (void *)(fw->data + hdr_offset);
602
603         status = myri10ge_validate_firmware(mgp, hdr);
604         if (status != 0)
605                 goto abort_with_fw;
606
607         crc = crc32(~0, fw->data, fw->size);
608         for (i = 0; i < fw->size; i += 256) {
609                 myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i,
610                                   fw->data + i,
611                                   min(256U, (unsigned)(fw->size - i)));
612                 mb();
613                 readb(mgp->sram);
614         }
615         fw_readback = vmalloc(fw->size);
616         if (!fw_readback) {
617                 status = -ENOMEM;
618                 goto abort_with_fw;
619         }
620         /* corruption checking is good for parity recovery and buggy chipset */
621         memcpy_fromio(fw_readback, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);
622         reread_crc = crc32(~0, fw_readback, fw->size);
623         vfree(fw_readback);
624         if (crc != reread_crc) {
625                 dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n",
626                         (unsigned)fw->size, reread_crc, crc);
627                 status = -EIO;
628                 goto abort_with_fw;
629         }
630         *size = (u32) fw->size;
631
632 abort_with_fw:
633         release_firmware(fw);
634
635 abort_with_nothing:
636         return status;
637 }
638
639 static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp)
640 {
641         struct mcp_gen_header *hdr;
642         struct device *dev = &mgp->pdev->dev;
643         const size_t bytes = sizeof(struct mcp_gen_header);
644         size_t hdr_offset;
645         int status;
646
647         /* find running firmware header */
648         hdr_offset = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
649
650         if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) {
651                 dev_err(dev, "Running firmware has bad header offset (%d)\n",
652                         (int)hdr_offset);
653                 return -EIO;
654         }
655
656         /* copy header of running firmware from SRAM to host memory to
657          * validate firmware */
658         hdr = kmalloc(bytes, GFP_KERNEL);
659         if (hdr == NULL) {
660                 dev_err(dev, "could not malloc firmware hdr\n");
661                 return -ENOMEM;
662         }
663         memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes);
664         status = myri10ge_validate_firmware(mgp, hdr);
665         kfree(hdr);
666
667         /* check to see if adopted firmware has bug where adopting
668          * it will cause broadcasts to be filtered unless the NIC
669          * is kept in ALLMULTI mode */
670         if (mgp->fw_ver_major == 1 && mgp->fw_ver_minor == 4 &&
671             mgp->fw_ver_tiny >= 4 && mgp->fw_ver_tiny <= 11) {
672                 mgp->adopted_rx_filter_bug = 1;
673                 dev_warn(dev, "Adopting fw %d.%d.%d: "
674                          "working around rx filter bug\n",
675                          mgp->fw_ver_major, mgp->fw_ver_minor,
676                          mgp->fw_ver_tiny);
677         }
678         return status;
679 }
680
681 static int myri10ge_get_firmware_capabilities(struct myri10ge_priv *mgp)
682 {
683         struct myri10ge_cmd cmd;
684         int status;
685
686         /* probe for IPv6 TSO support */
687         mgp->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
688         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_TSO6_HDR_SIZE,
689                                    &cmd, 0);
690         if (status == 0) {
691                 mgp->max_tso6 = cmd.data0;
692                 mgp->features |= NETIF_F_TSO6;
693         }
694
695         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
696         if (status != 0) {
697                 dev_err(&mgp->pdev->dev,
698                         "failed MXGEFW_CMD_GET_RX_RING_SIZE\n");
699                 return -ENXIO;
700         }
701
702         mgp->max_intr_slots = 2 * (cmd.data0 / sizeof(struct mcp_dma_addr));
703
704         return 0;
705 }
706
707 static int myri10ge_load_firmware(struct myri10ge_priv *mgp, int adopt)
708 {
709         char __iomem *submit;
710         __be32 buf[16] __attribute__ ((__aligned__(8)));
711         u32 dma_low, dma_high, size;
712         int status, i;
713
714         size = 0;
715         status = myri10ge_load_hotplug_firmware(mgp, &size);
716         if (status) {
717                 if (!adopt)
718                         return status;
719                 dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n");
720
721                 /* Do not attempt to adopt firmware if there
722                  * was a bad crc */
723                 if (status == -EIO)
724                         return status;
725
726                 status = myri10ge_adopt_running_firmware(mgp);
727                 if (status != 0) {
728                         dev_err(&mgp->pdev->dev,
729                                 "failed to adopt running firmware\n");
730                         return status;
731                 }
732                 dev_info(&mgp->pdev->dev,
733                          "Successfully adopted running firmware\n");
734                 if (mgp->tx_boundary == 4096) {
735                         dev_warn(&mgp->pdev->dev,
736                                  "Using firmware currently running on NIC"
737                                  ".  For optimal\n");
738                         dev_warn(&mgp->pdev->dev,
739                                  "performance consider loading optimized "
740                                  "firmware\n");
741                         dev_warn(&mgp->pdev->dev, "via hotplug\n");
742                 }
743
744                 mgp->fw_name = "adopted";
745                 mgp->tx_boundary = 2048;
746                 myri10ge_dummy_rdma(mgp, 1);
747                 status = myri10ge_get_firmware_capabilities(mgp);
748                 return status;
749         }
750
751         /* clear confirmation addr */
752         mgp->cmd->data = 0;
753         mb();
754
755         /* send a reload command to the bootstrap MCP, and wait for the
756          *  response in the confirmation address.  The firmware should
757          * write a -1 there to indicate it is alive and well
758          */
759         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
760         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
761
762         buf[0] = htonl(dma_high);       /* confirm addr MSW */
763         buf[1] = htonl(dma_low);        /* confirm addr LSW */
764         buf[2] = MYRI10GE_NO_CONFIRM_DATA;      /* confirm data */
765
766         /* FIX: All newest firmware should un-protect the bottom of
767          * the sram before handoff. However, the very first interfaces
768          * do not. Therefore the handoff copy must skip the first 8 bytes
769          */
770         buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */
771         buf[4] = htonl(size - 8);       /* length of code */
772         buf[5] = htonl(8);      /* where to copy to */
773         buf[6] = htonl(0);      /* where to jump to */
774
775         submit = mgp->sram + MXGEFW_BOOT_HANDOFF;
776
777         myri10ge_pio_copy(submit, &buf, sizeof(buf));
778         mb();
779         msleep(1);
780         mb();
781         i = 0;
782         while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 9) {
783                 msleep(1 << i);
784                 i++;
785         }
786         if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) {
787                 dev_err(&mgp->pdev->dev, "handoff failed\n");
788                 return -ENXIO;
789         }
790         myri10ge_dummy_rdma(mgp, 1);
791         status = myri10ge_get_firmware_capabilities(mgp);
792
793         return status;
794 }
795
796 static int myri10ge_update_mac_address(struct myri10ge_priv *mgp, u8 * addr)
797 {
798         struct myri10ge_cmd cmd;
799         int status;
800
801         cmd.data0 = ((addr[0] << 24) | (addr[1] << 16)
802                      | (addr[2] << 8) | addr[3]);
803
804         cmd.data1 = ((addr[4] << 8) | (addr[5]));
805
806         status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0);
807         return status;
808 }
809
810 static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause)
811 {
812         struct myri10ge_cmd cmd;
813         int status, ctl;
814
815         ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL;
816         status = myri10ge_send_cmd(mgp, ctl, &cmd, 0);
817
818         if (status) {
819                 printk(KERN_ERR
820                        "myri10ge: %s: Failed to set flow control mode\n",
821                        mgp->dev->name);
822                 return status;
823         }
824         mgp->pause = pause;
825         return 0;
826 }
827
828 static void
829 myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic)
830 {
831         struct myri10ge_cmd cmd;
832         int status, ctl;
833
834         ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC;
835         status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic);
836         if (status)
837                 printk(KERN_ERR "myri10ge: %s: Failed to set promisc mode\n",
838                        mgp->dev->name);
839 }
840
841 static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type)
842 {
843         struct myri10ge_cmd cmd;
844         int status;
845         u32 len;
846         struct page *dmatest_page;
847         dma_addr_t dmatest_bus;
848         char *test = " ";
849
850         dmatest_page = alloc_page(GFP_KERNEL);
851         if (!dmatest_page)
852                 return -ENOMEM;
853         dmatest_bus = pci_map_page(mgp->pdev, dmatest_page, 0, PAGE_SIZE,
854                                    DMA_BIDIRECTIONAL);
855
856         /* Run a small DMA test.
857          * The magic multipliers to the length tell the firmware
858          * to do DMA read, write, or read+write tests.  The
859          * results are returned in cmd.data0.  The upper 16
860          * bits or the return is the number of transfers completed.
861          * The lower 16 bits is the time in 0.5us ticks that the
862          * transfers took to complete.
863          */
864
865         len = mgp->tx_boundary;
866
867         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
868         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
869         cmd.data2 = len * 0x10000;
870         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
871         if (status != 0) {
872                 test = "read";
873                 goto abort;
874         }
875         mgp->read_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
876         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
877         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
878         cmd.data2 = len * 0x1;
879         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
880         if (status != 0) {
881                 test = "write";
882                 goto abort;
883         }
884         mgp->write_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
885
886         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
887         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
888         cmd.data2 = len * 0x10001;
889         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
890         if (status != 0) {
891                 test = "read/write";
892                 goto abort;
893         }
894         mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) /
895             (cmd.data0 & 0xffff);
896
897 abort:
898         pci_unmap_page(mgp->pdev, dmatest_bus, PAGE_SIZE, DMA_BIDIRECTIONAL);
899         put_page(dmatest_page);
900
901         if (status != 0 && test_type != MXGEFW_CMD_UNALIGNED_TEST)
902                 dev_warn(&mgp->pdev->dev, "DMA %s benchmark failed: %d\n",
903                          test, status);
904
905         return status;
906 }
907
908 static int myri10ge_reset(struct myri10ge_priv *mgp)
909 {
910         struct myri10ge_cmd cmd;
911         struct myri10ge_slice_state *ss;
912         int i, status;
913         size_t bytes;
914 #ifdef CONFIG_MYRI10GE_DCA
915         unsigned long dca_tag_off;
916 #endif
917
918         /* try to send a reset command to the card to see if it
919          * is alive */
920         memset(&cmd, 0, sizeof(cmd));
921         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
922         if (status != 0) {
923                 dev_err(&mgp->pdev->dev, "failed reset\n");
924                 return -ENXIO;
925         }
926
927         (void)myri10ge_dma_test(mgp, MXGEFW_DMA_TEST);
928         /*
929          * Use non-ndis mcp_slot (eg, 4 bytes total,
930          * no toeplitz hash value returned.  Older firmware will
931          * not understand this command, but will use the correct
932          * sized mcp_slot, so we ignore error returns
933          */
934         cmd.data0 = MXGEFW_RSS_MCP_SLOT_TYPE_MIN;
935         (void)myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_MCP_SLOT_TYPE, &cmd, 0);
936
937         /* Now exchange information about interrupts  */
938
939         bytes = mgp->max_intr_slots * sizeof(*mgp->ss[0].rx_done.entry);
940         cmd.data0 = (u32) bytes;
941         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
942
943         /*
944          * Even though we already know how many slices are supported
945          * via myri10ge_probe_slices() MXGEFW_CMD_GET_MAX_RSS_QUEUES
946          * has magic side effects, and must be called after a reset.
947          * It must be called prior to calling any RSS related cmds,
948          * including assigning an interrupt queue for anything but
949          * slice 0.  It must also be called *after*
950          * MXGEFW_CMD_SET_INTRQ_SIZE, since the intrq size is used by
951          * the firmware to compute offsets.
952          */
953
954         if (mgp->num_slices > 1) {
955
956                 /* ask the maximum number of slices it supports */
957                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES,
958                                            &cmd, 0);
959                 if (status != 0) {
960                         dev_err(&mgp->pdev->dev,
961                                 "failed to get number of slices\n");
962                 }
963
964                 /*
965                  * MXGEFW_CMD_ENABLE_RSS_QUEUES must be called prior
966                  * to setting up the interrupt queue DMA
967                  */
968
969                 cmd.data0 = mgp->num_slices;
970                 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
971                 if (mgp->dev->real_num_tx_queues > 1)
972                         cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
973                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
974                                            &cmd, 0);
975
976                 /* Firmware older than 1.4.32 only supports multiple
977                  * RX queues, so if we get an error, first retry using a
978                  * single TX queue before giving up */
979                 if (status != 0 && mgp->dev->real_num_tx_queues > 1) {
980                         mgp->dev->real_num_tx_queues = 1;
981                         cmd.data0 = mgp->num_slices;
982                         cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
983                         status = myri10ge_send_cmd(mgp,
984                                                    MXGEFW_CMD_ENABLE_RSS_QUEUES,
985                                                    &cmd, 0);
986                 }
987
988                 if (status != 0) {
989                         dev_err(&mgp->pdev->dev,
990                                 "failed to set number of slices\n");
991
992                         return status;
993                 }
994         }
995         for (i = 0; i < mgp->num_slices; i++) {
996                 ss = &mgp->ss[i];
997                 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->rx_done.bus);
998                 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->rx_done.bus);
999                 cmd.data2 = i;
1000                 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA,
1001                                             &cmd, 0);
1002         };
1003
1004         status |=
1005             myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0);
1006         for (i = 0; i < mgp->num_slices; i++) {
1007                 ss = &mgp->ss[i];
1008                 ss->irq_claim =
1009                     (__iomem __be32 *) (mgp->sram + cmd.data0 + 8 * i);
1010         }
1011         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET,
1012                                     &cmd, 0);
1013         mgp->irq_deassert = (__iomem __be32 *) (mgp->sram + cmd.data0);
1014
1015         status |= myri10ge_send_cmd
1016             (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0);
1017         mgp->intr_coal_delay_ptr = (__iomem __be32 *) (mgp->sram + cmd.data0);
1018         if (status != 0) {
1019                 dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n");
1020                 return status;
1021         }
1022         put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1023
1024 #ifdef CONFIG_MYRI10GE_DCA
1025         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_DCA_OFFSET, &cmd, 0);
1026         dca_tag_off = cmd.data0;
1027         for (i = 0; i < mgp->num_slices; i++) {
1028                 ss = &mgp->ss[i];
1029                 if (status == 0) {
1030                         ss->dca_tag = (__iomem __be32 *)
1031                             (mgp->sram + dca_tag_off + 4 * i);
1032                 } else {
1033                         ss->dca_tag = NULL;
1034                 }
1035         }
1036 #endif                          /* CONFIG_MYRI10GE_DCA */
1037
1038         /* reset mcp/driver shared state back to 0 */
1039
1040         mgp->link_changes = 0;
1041         for (i = 0; i < mgp->num_slices; i++) {
1042                 ss = &mgp->ss[i];
1043
1044                 memset(ss->rx_done.entry, 0, bytes);
1045                 ss->tx.req = 0;
1046                 ss->tx.done = 0;
1047                 ss->tx.pkt_start = 0;
1048                 ss->tx.pkt_done = 0;
1049                 ss->rx_big.cnt = 0;
1050                 ss->rx_small.cnt = 0;
1051                 ss->rx_done.idx = 0;
1052                 ss->rx_done.cnt = 0;
1053                 ss->tx.wake_queue = 0;
1054                 ss->tx.stop_queue = 0;
1055         }
1056
1057         status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr);
1058         myri10ge_change_pause(mgp, mgp->pause);
1059         myri10ge_set_multicast_list(mgp->dev);
1060         return status;
1061 }
1062
1063 #ifdef CONFIG_MYRI10GE_DCA
1064 static void
1065 myri10ge_write_dca(struct myri10ge_slice_state *ss, int cpu, int tag)
1066 {
1067         ss->cpu = cpu;
1068         ss->cached_dca_tag = tag;
1069         put_be32(htonl(tag), ss->dca_tag);
1070 }
1071
1072 static inline void myri10ge_update_dca(struct myri10ge_slice_state *ss)
1073 {
1074         int cpu = get_cpu();
1075         int tag;
1076
1077         if (cpu != ss->cpu) {
1078                 tag = dca_get_tag(cpu);
1079                 if (ss->cached_dca_tag != tag)
1080                         myri10ge_write_dca(ss, cpu, tag);
1081         }
1082         put_cpu();
1083 }
1084
1085 static void myri10ge_setup_dca(struct myri10ge_priv *mgp)
1086 {
1087         int err, i;
1088         struct pci_dev *pdev = mgp->pdev;
1089
1090         if (mgp->ss[0].dca_tag == NULL || mgp->dca_enabled)
1091                 return;
1092         if (!myri10ge_dca) {
1093                 dev_err(&pdev->dev, "dca disabled by administrator\n");
1094                 return;
1095         }
1096         err = dca_add_requester(&pdev->dev);
1097         if (err) {
1098                 if (err != -ENODEV)
1099                         dev_err(&pdev->dev,
1100                                 "dca_add_requester() failed, err=%d\n", err);
1101                 return;
1102         }
1103         mgp->dca_enabled = 1;
1104         for (i = 0; i < mgp->num_slices; i++)
1105                 myri10ge_write_dca(&mgp->ss[i], -1, 0);
1106 }
1107
1108 static void myri10ge_teardown_dca(struct myri10ge_priv *mgp)
1109 {
1110         struct pci_dev *pdev = mgp->pdev;
1111         int err;
1112
1113         if (!mgp->dca_enabled)
1114                 return;
1115         mgp->dca_enabled = 0;
1116         err = dca_remove_requester(&pdev->dev);
1117 }
1118
1119 static int myri10ge_notify_dca_device(struct device *dev, void *data)
1120 {
1121         struct myri10ge_priv *mgp;
1122         unsigned long event;
1123
1124         mgp = dev_get_drvdata(dev);
1125         event = *(unsigned long *)data;
1126
1127         if (event == DCA_PROVIDER_ADD)
1128                 myri10ge_setup_dca(mgp);
1129         else if (event == DCA_PROVIDER_REMOVE)
1130                 myri10ge_teardown_dca(mgp);
1131         return 0;
1132 }
1133 #endif                          /* CONFIG_MYRI10GE_DCA */
1134
1135 static inline void
1136 myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst,
1137                     struct mcp_kreq_ether_recv *src)
1138 {
1139         __be32 low;
1140
1141         low = src->addr_low;
1142         src->addr_low = htonl(DMA_BIT_MASK(32));
1143         myri10ge_pio_copy(dst, src, 4 * sizeof(*src));
1144         mb();
1145         myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src));
1146         mb();
1147         src->addr_low = low;
1148         put_be32(low, &dst->addr_low);
1149         mb();
1150 }
1151
1152 static inline void myri10ge_vlan_ip_csum(struct sk_buff *skb, __wsum hw_csum)
1153 {
1154         struct vlan_hdr *vh = (struct vlan_hdr *)(skb->data);
1155
1156         if ((skb->protocol == htons(ETH_P_8021Q)) &&
1157             (vh->h_vlan_encapsulated_proto == htons(ETH_P_IP) ||
1158              vh->h_vlan_encapsulated_proto == htons(ETH_P_IPV6))) {
1159                 skb->csum = hw_csum;
1160                 skb->ip_summed = CHECKSUM_COMPLETE;
1161         }
1162 }
1163
1164 static inline void
1165 myri10ge_rx_skb_build(struct sk_buff *skb, u8 * va,
1166                       struct skb_frag_struct *rx_frags, int len, int hlen)
1167 {
1168         struct skb_frag_struct *skb_frags;
1169
1170         skb->len = skb->data_len = len;
1171         skb->truesize = len + sizeof(struct sk_buff);
1172         /* attach the page(s) */
1173
1174         skb_frags = skb_shinfo(skb)->frags;
1175         while (len > 0) {
1176                 memcpy(skb_frags, rx_frags, sizeof(*skb_frags));
1177                 len -= rx_frags->size;
1178                 skb_frags++;
1179                 rx_frags++;
1180                 skb_shinfo(skb)->nr_frags++;
1181         }
1182
1183         /* pskb_may_pull is not available in irq context, but
1184          * skb_pull() (for ether_pad and eth_type_trans()) requires
1185          * the beginning of the packet in skb_headlen(), move it
1186          * manually */
1187         skb_copy_to_linear_data(skb, va, hlen);
1188         skb_shinfo(skb)->frags[0].page_offset += hlen;
1189         skb_shinfo(skb)->frags[0].size -= hlen;
1190         skb->data_len -= hlen;
1191         skb->tail += hlen;
1192         skb_pull(skb, MXGEFW_PAD);
1193 }
1194
1195 static void
1196 myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
1197                         int bytes, int watchdog)
1198 {
1199         struct page *page;
1200         int idx;
1201
1202         if (unlikely(rx->watchdog_needed && !watchdog))
1203                 return;
1204
1205         /* try to refill entire ring */
1206         while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) {
1207                 idx = rx->fill_cnt & rx->mask;
1208                 if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) {
1209                         /* we can use part of previous page */
1210                         get_page(rx->page);
1211                 } else {
1212                         /* we need a new page */
1213                         page =
1214                             alloc_pages(GFP_ATOMIC | __GFP_COMP,
1215                                         MYRI10GE_ALLOC_ORDER);
1216                         if (unlikely(page == NULL)) {
1217                                 if (rx->fill_cnt - rx->cnt < 16)
1218                                         rx->watchdog_needed = 1;
1219                                 return;
1220                         }
1221                         rx->page = page;
1222                         rx->page_offset = 0;
1223                         rx->bus = pci_map_page(mgp->pdev, page, 0,
1224                                                MYRI10GE_ALLOC_SIZE,
1225                                                PCI_DMA_FROMDEVICE);
1226                 }
1227                 rx->info[idx].page = rx->page;
1228                 rx->info[idx].page_offset = rx->page_offset;
1229                 /* note that this is the address of the start of the
1230                  * page */
1231                 pci_unmap_addr_set(&rx->info[idx], bus, rx->bus);
1232                 rx->shadow[idx].addr_low =
1233                     htonl(MYRI10GE_LOWPART_TO_U32(rx->bus) + rx->page_offset);
1234                 rx->shadow[idx].addr_high =
1235                     htonl(MYRI10GE_HIGHPART_TO_U32(rx->bus));
1236
1237                 /* start next packet on a cacheline boundary */
1238                 rx->page_offset += SKB_DATA_ALIGN(bytes);
1239
1240 #if MYRI10GE_ALLOC_SIZE > 4096
1241                 /* don't cross a 4KB boundary */
1242                 if ((rx->page_offset >> 12) !=
1243                     ((rx->page_offset + bytes - 1) >> 12))
1244                         rx->page_offset = (rx->page_offset + 4096) & ~4095;
1245 #endif
1246                 rx->fill_cnt++;
1247
1248                 /* copy 8 descriptors to the firmware at a time */
1249                 if ((idx & 7) == 7) {
1250                         myri10ge_submit_8rx(&rx->lanai[idx - 7],
1251                                             &rx->shadow[idx - 7]);
1252                 }
1253         }
1254 }
1255
1256 static inline void
1257 myri10ge_unmap_rx_page(struct pci_dev *pdev,
1258                        struct myri10ge_rx_buffer_state *info, int bytes)
1259 {
1260         /* unmap the recvd page if we're the only or last user of it */
1261         if (bytes >= MYRI10GE_ALLOC_SIZE / 2 ||
1262             (info->page_offset + 2 * bytes) > MYRI10GE_ALLOC_SIZE) {
1263                 pci_unmap_page(pdev, (pci_unmap_addr(info, bus)
1264                                       & ~(MYRI10GE_ALLOC_SIZE - 1)),
1265                                MYRI10GE_ALLOC_SIZE, PCI_DMA_FROMDEVICE);
1266         }
1267 }
1268
1269 #define MYRI10GE_HLEN 64        /* The number of bytes to copy from a
1270                                  * page into an skb */
1271
1272 static inline int
1273 myri10ge_rx_done(struct myri10ge_slice_state *ss, struct myri10ge_rx_buf *rx,
1274                  int bytes, int len, __wsum csum)
1275 {
1276         struct myri10ge_priv *mgp = ss->mgp;
1277         struct sk_buff *skb;
1278         struct skb_frag_struct rx_frags[MYRI10GE_MAX_FRAGS_PER_FRAME];
1279         int i, idx, hlen, remainder;
1280         struct pci_dev *pdev = mgp->pdev;
1281         struct net_device *dev = mgp->dev;
1282         u8 *va;
1283
1284         len += MXGEFW_PAD;
1285         idx = rx->cnt & rx->mask;
1286         va = page_address(rx->info[idx].page) + rx->info[idx].page_offset;
1287         prefetch(va);
1288         /* Fill skb_frag_struct(s) with data from our receive */
1289         for (i = 0, remainder = len; remainder > 0; i++) {
1290                 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1291                 rx_frags[i].page = rx->info[idx].page;
1292                 rx_frags[i].page_offset = rx->info[idx].page_offset;
1293                 if (remainder < MYRI10GE_ALLOC_SIZE)
1294                         rx_frags[i].size = remainder;
1295                 else
1296                         rx_frags[i].size = MYRI10GE_ALLOC_SIZE;
1297                 rx->cnt++;
1298                 idx = rx->cnt & rx->mask;
1299                 remainder -= MYRI10GE_ALLOC_SIZE;
1300         }
1301
1302         if (dev->features & NETIF_F_LRO) {
1303                 rx_frags[0].page_offset += MXGEFW_PAD;
1304                 rx_frags[0].size -= MXGEFW_PAD;
1305                 len -= MXGEFW_PAD;
1306                 lro_receive_frags(&ss->rx_done.lro_mgr, rx_frags,
1307                                   /* opaque, will come back in get_frag_header */
1308                                   len, len,
1309                                   (void *)(__force unsigned long)csum, csum);
1310
1311                 return 1;
1312         }
1313
1314         hlen = MYRI10GE_HLEN > len ? len : MYRI10GE_HLEN;
1315
1316         /* allocate an skb to attach the page(s) to. This is done
1317          * after trying LRO, so as to avoid skb allocation overheads */
1318
1319         skb = netdev_alloc_skb(dev, MYRI10GE_HLEN + 16);
1320         if (unlikely(skb == NULL)) {
1321                 ss->stats.rx_dropped++;
1322                 do {
1323                         i--;
1324                         put_page(rx_frags[i].page);
1325                 } while (i != 0);
1326                 return 0;
1327         }
1328
1329         /* Attach the pages to the skb, and trim off any padding */
1330         myri10ge_rx_skb_build(skb, va, rx_frags, len, hlen);
1331         if (skb_shinfo(skb)->frags[0].size <= 0) {
1332                 put_page(skb_shinfo(skb)->frags[0].page);
1333                 skb_shinfo(skb)->nr_frags = 0;
1334         }
1335         skb->protocol = eth_type_trans(skb, dev);
1336         skb_record_rx_queue(skb, ss - &mgp->ss[0]);
1337
1338         if (mgp->csum_flag) {
1339                 if ((skb->protocol == htons(ETH_P_IP)) ||
1340                     (skb->protocol == htons(ETH_P_IPV6))) {
1341                         skb->csum = csum;
1342                         skb->ip_summed = CHECKSUM_COMPLETE;
1343                 } else
1344                         myri10ge_vlan_ip_csum(skb, csum);
1345         }
1346         netif_receive_skb(skb);
1347         return 1;
1348 }
1349
1350 static inline void
1351 myri10ge_tx_done(struct myri10ge_slice_state *ss, int mcp_index)
1352 {
1353         struct pci_dev *pdev = ss->mgp->pdev;
1354         struct myri10ge_tx_buf *tx = &ss->tx;
1355         struct netdev_queue *dev_queue;
1356         struct sk_buff *skb;
1357         int idx, len;
1358
1359         while (tx->pkt_done != mcp_index) {
1360                 idx = tx->done & tx->mask;
1361                 skb = tx->info[idx].skb;
1362
1363                 /* Mark as free */
1364                 tx->info[idx].skb = NULL;
1365                 if (tx->info[idx].last) {
1366                         tx->pkt_done++;
1367                         tx->info[idx].last = 0;
1368                 }
1369                 tx->done++;
1370                 len = pci_unmap_len(&tx->info[idx], len);
1371                 pci_unmap_len_set(&tx->info[idx], len, 0);
1372                 if (skb) {
1373                         ss->stats.tx_bytes += skb->len;
1374                         ss->stats.tx_packets++;
1375                         dev_kfree_skb_irq(skb);
1376                         if (len)
1377                                 pci_unmap_single(pdev,
1378                                                  pci_unmap_addr(&tx->info[idx],
1379                                                                 bus), len,
1380                                                  PCI_DMA_TODEVICE);
1381                 } else {
1382                         if (len)
1383                                 pci_unmap_page(pdev,
1384                                                pci_unmap_addr(&tx->info[idx],
1385                                                               bus), len,
1386                                                PCI_DMA_TODEVICE);
1387                 }
1388         }
1389
1390         dev_queue = netdev_get_tx_queue(ss->dev, ss - ss->mgp->ss);
1391         /*
1392          * Make a minimal effort to prevent the NIC from polling an
1393          * idle tx queue.  If we can't get the lock we leave the queue
1394          * active. In this case, either a thread was about to start
1395          * using the queue anyway, or we lost a race and the NIC will
1396          * waste some of its resources polling an inactive queue for a
1397          * while.
1398          */
1399
1400         if ((ss->mgp->dev->real_num_tx_queues > 1) &&
1401             __netif_tx_trylock(dev_queue)) {
1402                 if (tx->req == tx->done) {
1403                         tx->queue_active = 0;
1404                         put_be32(htonl(1), tx->send_stop);
1405                         mb();
1406                         mmiowb();
1407                 }
1408                 __netif_tx_unlock(dev_queue);
1409         }
1410
1411         /* start the queue if we've stopped it */
1412         if (netif_tx_queue_stopped(dev_queue)
1413             && tx->req - tx->done < (tx->mask >> 1)) {
1414                 tx->wake_queue++;
1415                 netif_tx_wake_queue(dev_queue);
1416         }
1417 }
1418
1419 static inline int
1420 myri10ge_clean_rx_done(struct myri10ge_slice_state *ss, int budget)
1421 {
1422         struct myri10ge_rx_done *rx_done = &ss->rx_done;
1423         struct myri10ge_priv *mgp = ss->mgp;
1424         struct net_device *netdev = mgp->dev;
1425         unsigned long rx_bytes = 0;
1426         unsigned long rx_packets = 0;
1427         unsigned long rx_ok;
1428
1429         int idx = rx_done->idx;
1430         int cnt = rx_done->cnt;
1431         int work_done = 0;
1432         u16 length;
1433         __wsum checksum;
1434
1435         while (rx_done->entry[idx].length != 0 && work_done < budget) {
1436                 length = ntohs(rx_done->entry[idx].length);
1437                 rx_done->entry[idx].length = 0;
1438                 checksum = csum_unfold(rx_done->entry[idx].checksum);
1439                 if (length <= mgp->small_bytes)
1440                         rx_ok = myri10ge_rx_done(ss, &ss->rx_small,
1441                                                  mgp->small_bytes,
1442                                                  length, checksum);
1443                 else
1444                         rx_ok = myri10ge_rx_done(ss, &ss->rx_big,
1445                                                  mgp->big_bytes,
1446                                                  length, checksum);
1447                 rx_packets += rx_ok;
1448                 rx_bytes += rx_ok * (unsigned long)length;
1449                 cnt++;
1450                 idx = cnt & (mgp->max_intr_slots - 1);
1451                 work_done++;
1452         }
1453         rx_done->idx = idx;
1454         rx_done->cnt = cnt;
1455         ss->stats.rx_packets += rx_packets;
1456         ss->stats.rx_bytes += rx_bytes;
1457
1458         if (netdev->features & NETIF_F_LRO)
1459                 lro_flush_all(&rx_done->lro_mgr);
1460
1461         /* restock receive rings if needed */
1462         if (ss->rx_small.fill_cnt - ss->rx_small.cnt < myri10ge_fill_thresh)
1463                 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
1464                                         mgp->small_bytes + MXGEFW_PAD, 0);
1465         if (ss->rx_big.fill_cnt - ss->rx_big.cnt < myri10ge_fill_thresh)
1466                 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
1467
1468         return work_done;
1469 }
1470
1471 static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
1472 {
1473         struct mcp_irq_data *stats = mgp->ss[0].fw_stats;
1474
1475         if (unlikely(stats->stats_updated)) {
1476                 unsigned link_up = ntohl(stats->link_up);
1477                 if (mgp->link_state != link_up) {
1478                         mgp->link_state = link_up;
1479
1480                         if (mgp->link_state == MXGEFW_LINK_UP) {
1481                                 if (netif_msg_link(mgp))
1482                                         printk(KERN_INFO
1483                                                "myri10ge: %s: link up\n",
1484                                                mgp->dev->name);
1485                                 netif_carrier_on(mgp->dev);
1486                                 mgp->link_changes++;
1487                         } else {
1488                                 if (netif_msg_link(mgp))
1489                                         printk(KERN_INFO
1490                                                "myri10ge: %s: link %s\n",
1491                                                mgp->dev->name,
1492                                                (link_up == MXGEFW_LINK_MYRINET ?
1493                                                 "mismatch (Myrinet detected)" :
1494                                                 "down"));
1495                                 netif_carrier_off(mgp->dev);
1496                                 mgp->link_changes++;
1497                         }
1498                 }
1499                 if (mgp->rdma_tags_available !=
1500                     ntohl(stats->rdma_tags_available)) {
1501                         mgp->rdma_tags_available =
1502                             ntohl(stats->rdma_tags_available);
1503                         printk(KERN_WARNING "myri10ge: %s: RDMA timed out! "
1504                                "%d tags left\n", mgp->dev->name,
1505                                mgp->rdma_tags_available);
1506                 }
1507                 mgp->down_cnt += stats->link_down;
1508                 if (stats->link_down)
1509                         wake_up(&mgp->down_wq);
1510         }
1511 }
1512
1513 static int myri10ge_poll(struct napi_struct *napi, int budget)
1514 {
1515         struct myri10ge_slice_state *ss =
1516             container_of(napi, struct myri10ge_slice_state, napi);
1517         int work_done;
1518
1519 #ifdef CONFIG_MYRI10GE_DCA
1520         if (ss->mgp->dca_enabled)
1521                 myri10ge_update_dca(ss);
1522 #endif
1523
1524         /* process as many rx events as NAPI will allow */
1525         work_done = myri10ge_clean_rx_done(ss, budget);
1526
1527         if (work_done < budget) {
1528                 napi_complete(napi);
1529                 put_be32(htonl(3), ss->irq_claim);
1530         }
1531         return work_done;
1532 }
1533
1534 static irqreturn_t myri10ge_intr(int irq, void *arg)
1535 {
1536         struct myri10ge_slice_state *ss = arg;
1537         struct myri10ge_priv *mgp = ss->mgp;
1538         struct mcp_irq_data *stats = ss->fw_stats;
1539         struct myri10ge_tx_buf *tx = &ss->tx;
1540         u32 send_done_count;
1541         int i;
1542
1543         /* an interrupt on a non-zero receive-only slice is implicitly
1544          * valid  since MSI-X irqs are not shared */
1545         if ((mgp->dev->real_num_tx_queues == 1) && (ss != mgp->ss)) {
1546                 napi_schedule(&ss->napi);
1547                 return (IRQ_HANDLED);
1548         }
1549
1550         /* make sure it is our IRQ, and that the DMA has finished */
1551         if (unlikely(!stats->valid))
1552                 return (IRQ_NONE);
1553
1554         /* low bit indicates receives are present, so schedule
1555          * napi poll handler */
1556         if (stats->valid & 1)
1557                 napi_schedule(&ss->napi);
1558
1559         if (!mgp->msi_enabled && !mgp->msix_enabled) {
1560                 put_be32(0, mgp->irq_deassert);
1561                 if (!myri10ge_deassert_wait)
1562                         stats->valid = 0;
1563                 mb();
1564         } else
1565                 stats->valid = 0;
1566
1567         /* Wait for IRQ line to go low, if using INTx */
1568         i = 0;
1569         while (1) {
1570                 i++;
1571                 /* check for transmit completes and receives */
1572                 send_done_count = ntohl(stats->send_done_count);
1573                 if (send_done_count != tx->pkt_done)
1574                         myri10ge_tx_done(ss, (int)send_done_count);
1575                 if (unlikely(i > myri10ge_max_irq_loops)) {
1576                         printk(KERN_WARNING "myri10ge: %s: irq stuck?\n",
1577                                mgp->dev->name);
1578                         stats->valid = 0;
1579                         schedule_work(&mgp->watchdog_work);
1580                 }
1581                 if (likely(stats->valid == 0))
1582                         break;
1583                 cpu_relax();
1584                 barrier();
1585         }
1586
1587         /* Only slice 0 updates stats */
1588         if (ss == mgp->ss)
1589                 myri10ge_check_statblock(mgp);
1590
1591         put_be32(htonl(3), ss->irq_claim + 1);
1592         return (IRQ_HANDLED);
1593 }
1594
1595 static int
1596 myri10ge_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
1597 {
1598         struct myri10ge_priv *mgp = netdev_priv(netdev);
1599         char *ptr;
1600         int i;
1601
1602         cmd->autoneg = AUTONEG_DISABLE;
1603         cmd->speed = SPEED_10000;
1604         cmd->duplex = DUPLEX_FULL;
1605
1606         /*
1607          * parse the product code to deterimine the interface type
1608          * (CX4, XFP, Quad Ribbon Fiber) by looking at the character
1609          * after the 3rd dash in the driver's cached copy of the
1610          * EEPROM's product code string.
1611          */
1612         ptr = mgp->product_code_string;
1613         if (ptr == NULL) {
1614                 printk(KERN_ERR "myri10ge: %s: Missing product code\n",
1615                        netdev->name);
1616                 return 0;
1617         }
1618         for (i = 0; i < 3; i++, ptr++) {
1619                 ptr = strchr(ptr, '-');
1620                 if (ptr == NULL) {
1621                         printk(KERN_ERR "myri10ge: %s: Invalid product "
1622                                "code %s\n", netdev->name,
1623                                mgp->product_code_string);
1624                         return 0;
1625                 }
1626         }
1627         if (*ptr == 'R' || *ptr == 'Q') {
1628                 /* We've found either an XFP or quad ribbon fiber */
1629                 cmd->port = PORT_FIBRE;
1630         }
1631         return 0;
1632 }
1633
1634 static void
1635 myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
1636 {
1637         struct myri10ge_priv *mgp = netdev_priv(netdev);
1638
1639         strlcpy(info->driver, "myri10ge", sizeof(info->driver));
1640         strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version));
1641         strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version));
1642         strlcpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info));
1643 }
1644
1645 static int
1646 myri10ge_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1647 {
1648         struct myri10ge_priv *mgp = netdev_priv(netdev);
1649
1650         coal->rx_coalesce_usecs = mgp->intr_coal_delay;
1651         return 0;
1652 }
1653
1654 static int
1655 myri10ge_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1656 {
1657         struct myri10ge_priv *mgp = netdev_priv(netdev);
1658
1659         mgp->intr_coal_delay = coal->rx_coalesce_usecs;
1660         put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1661         return 0;
1662 }
1663
1664 static void
1665 myri10ge_get_pauseparam(struct net_device *netdev,
1666                         struct ethtool_pauseparam *pause)
1667 {
1668         struct myri10ge_priv *mgp = netdev_priv(netdev);
1669
1670         pause->autoneg = 0;
1671         pause->rx_pause = mgp->pause;
1672         pause->tx_pause = mgp->pause;
1673 }
1674
1675 static int
1676 myri10ge_set_pauseparam(struct net_device *netdev,
1677                         struct ethtool_pauseparam *pause)
1678 {
1679         struct myri10ge_priv *mgp = netdev_priv(netdev);
1680
1681         if (pause->tx_pause != mgp->pause)
1682                 return myri10ge_change_pause(mgp, pause->tx_pause);
1683         if (pause->rx_pause != mgp->pause)
1684                 return myri10ge_change_pause(mgp, pause->tx_pause);
1685         if (pause->autoneg != 0)
1686                 return -EINVAL;
1687         return 0;
1688 }
1689
1690 static void
1691 myri10ge_get_ringparam(struct net_device *netdev,
1692                        struct ethtool_ringparam *ring)
1693 {
1694         struct myri10ge_priv *mgp = netdev_priv(netdev);
1695
1696         ring->rx_mini_max_pending = mgp->ss[0].rx_small.mask + 1;
1697         ring->rx_max_pending = mgp->ss[0].rx_big.mask + 1;
1698         ring->rx_jumbo_max_pending = 0;
1699         ring->tx_max_pending = mgp->ss[0].tx.mask + 1;
1700         ring->rx_mini_pending = ring->rx_mini_max_pending;
1701         ring->rx_pending = ring->rx_max_pending;
1702         ring->rx_jumbo_pending = ring->rx_jumbo_max_pending;
1703         ring->tx_pending = ring->tx_max_pending;
1704 }
1705
1706 static u32 myri10ge_get_rx_csum(struct net_device *netdev)
1707 {
1708         struct myri10ge_priv *mgp = netdev_priv(netdev);
1709
1710         if (mgp->csum_flag)
1711                 return 1;
1712         else
1713                 return 0;
1714 }
1715
1716 static int myri10ge_set_rx_csum(struct net_device *netdev, u32 csum_enabled)
1717 {
1718         struct myri10ge_priv *mgp = netdev_priv(netdev);
1719         int err = 0;
1720
1721         if (csum_enabled)
1722                 mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
1723         else {
1724                 u32 flags = ethtool_op_get_flags(netdev);
1725                 err = ethtool_op_set_flags(netdev, (flags & ~ETH_FLAG_LRO));
1726                 mgp->csum_flag = 0;
1727
1728         }
1729         return err;
1730 }
1731
1732 static int myri10ge_set_tso(struct net_device *netdev, u32 tso_enabled)
1733 {
1734         struct myri10ge_priv *mgp = netdev_priv(netdev);
1735         unsigned long flags = mgp->features & (NETIF_F_TSO6 | NETIF_F_TSO);
1736
1737         if (tso_enabled)
1738                 netdev->features |= flags;
1739         else
1740                 netdev->features &= ~flags;
1741         return 0;
1742 }
1743
1744 static const char myri10ge_gstrings_main_stats[][ETH_GSTRING_LEN] = {
1745         "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
1746         "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
1747         "rx_length_errors", "rx_over_errors", "rx_crc_errors",
1748         "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
1749         "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
1750         "tx_heartbeat_errors", "tx_window_errors",
1751         /* device-specific stats */
1752         "tx_boundary", "WC", "irq", "MSI", "MSIX",
1753         "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
1754         "serial_number", "watchdog_resets",
1755 #ifdef CONFIG_MYRI10GE_DCA
1756         "dca_capable_firmware", "dca_device_present",
1757 #endif
1758         "link_changes", "link_up", "dropped_link_overflow",
1759         "dropped_link_error_or_filtered",
1760         "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32",
1761         "dropped_unicast_filtered", "dropped_multicast_filtered",
1762         "dropped_runt", "dropped_overrun", "dropped_no_small_buffer",
1763         "dropped_no_big_buffer"
1764 };
1765
1766 static const char myri10ge_gstrings_slice_stats[][ETH_GSTRING_LEN] = {
1767         "----------- slice ---------",
1768         "tx_pkt_start", "tx_pkt_done", "tx_req", "tx_done",
1769         "rx_small_cnt", "rx_big_cnt",
1770         "wake_queue", "stop_queue", "tx_linearized", "LRO aggregated",
1771             "LRO flushed",
1772         "LRO avg aggr", "LRO no_desc"
1773 };
1774
1775 #define MYRI10GE_NET_STATS_LEN      21
1776 #define MYRI10GE_MAIN_STATS_LEN  ARRAY_SIZE(myri10ge_gstrings_main_stats)
1777 #define MYRI10GE_SLICE_STATS_LEN  ARRAY_SIZE(myri10ge_gstrings_slice_stats)
1778
1779 static void
1780 myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
1781 {
1782         struct myri10ge_priv *mgp = netdev_priv(netdev);
1783         int i;
1784
1785         switch (stringset) {
1786         case ETH_SS_STATS:
1787                 memcpy(data, *myri10ge_gstrings_main_stats,
1788                        sizeof(myri10ge_gstrings_main_stats));
1789                 data += sizeof(myri10ge_gstrings_main_stats);
1790                 for (i = 0; i < mgp->num_slices; i++) {
1791                         memcpy(data, *myri10ge_gstrings_slice_stats,
1792                                sizeof(myri10ge_gstrings_slice_stats));
1793                         data += sizeof(myri10ge_gstrings_slice_stats);
1794                 }
1795                 break;
1796         }
1797 }
1798
1799 static int myri10ge_get_sset_count(struct net_device *netdev, int sset)
1800 {
1801         struct myri10ge_priv *mgp = netdev_priv(netdev);
1802
1803         switch (sset) {
1804         case ETH_SS_STATS:
1805                 return MYRI10GE_MAIN_STATS_LEN +
1806                     mgp->num_slices * MYRI10GE_SLICE_STATS_LEN;
1807         default:
1808                 return -EOPNOTSUPP;
1809         }
1810 }
1811
1812 static void
1813 myri10ge_get_ethtool_stats(struct net_device *netdev,
1814                            struct ethtool_stats *stats, u64 * data)
1815 {
1816         struct myri10ge_priv *mgp = netdev_priv(netdev);
1817         struct myri10ge_slice_state *ss;
1818         int slice;
1819         int i;
1820
1821         /* force stats update */
1822         (void)myri10ge_get_stats(netdev);
1823         for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++)
1824                 data[i] = ((unsigned long *)&mgp->stats)[i];
1825
1826         data[i++] = (unsigned int)mgp->tx_boundary;
1827         data[i++] = (unsigned int)mgp->wc_enabled;
1828         data[i++] = (unsigned int)mgp->pdev->irq;
1829         data[i++] = (unsigned int)mgp->msi_enabled;
1830         data[i++] = (unsigned int)mgp->msix_enabled;
1831         data[i++] = (unsigned int)mgp->read_dma;
1832         data[i++] = (unsigned int)mgp->write_dma;
1833         data[i++] = (unsigned int)mgp->read_write_dma;
1834         data[i++] = (unsigned int)mgp->serial_number;
1835         data[i++] = (unsigned int)mgp->watchdog_resets;
1836 #ifdef CONFIG_MYRI10GE_DCA
1837         data[i++] = (unsigned int)(mgp->ss[0].dca_tag != NULL);
1838         data[i++] = (unsigned int)(mgp->dca_enabled);
1839 #endif
1840         data[i++] = (unsigned int)mgp->link_changes;
1841
1842         /* firmware stats are useful only in the first slice */
1843         ss = &mgp->ss[0];
1844         data[i++] = (unsigned int)ntohl(ss->fw_stats->link_up);
1845         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_link_overflow);
1846         data[i++] =
1847             (unsigned int)ntohl(ss->fw_stats->dropped_link_error_or_filtered);
1848         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_pause);
1849         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_phy);
1850         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_crc32);
1851         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_unicast_filtered);
1852         data[i++] =
1853             (unsigned int)ntohl(ss->fw_stats->dropped_multicast_filtered);
1854         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_runt);
1855         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_overrun);
1856         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_small_buffer);
1857         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_big_buffer);
1858
1859         for (slice = 0; slice < mgp->num_slices; slice++) {
1860                 ss = &mgp->ss[slice];
1861                 data[i++] = slice;
1862                 data[i++] = (unsigned int)ss->tx.pkt_start;
1863                 data[i++] = (unsigned int)ss->tx.pkt_done;
1864                 data[i++] = (unsigned int)ss->tx.req;
1865                 data[i++] = (unsigned int)ss->tx.done;
1866                 data[i++] = (unsigned int)ss->rx_small.cnt;
1867                 data[i++] = (unsigned int)ss->rx_big.cnt;
1868                 data[i++] = (unsigned int)ss->tx.wake_queue;
1869                 data[i++] = (unsigned int)ss->tx.stop_queue;
1870                 data[i++] = (unsigned int)ss->tx.linearized;
1871                 data[i++] = ss->rx_done.lro_mgr.stats.aggregated;
1872                 data[i++] = ss->rx_done.lro_mgr.stats.flushed;
1873                 if (ss->rx_done.lro_mgr.stats.flushed)
1874                         data[i++] = ss->rx_done.lro_mgr.stats.aggregated /
1875                             ss->rx_done.lro_mgr.stats.flushed;
1876                 else
1877                         data[i++] = 0;
1878                 data[i++] = ss->rx_done.lro_mgr.stats.no_desc;
1879         }
1880 }
1881
1882 static void myri10ge_set_msglevel(struct net_device *netdev, u32 value)
1883 {
1884         struct myri10ge_priv *mgp = netdev_priv(netdev);
1885         mgp->msg_enable = value;
1886 }
1887
1888 static u32 myri10ge_get_msglevel(struct net_device *netdev)
1889 {
1890         struct myri10ge_priv *mgp = netdev_priv(netdev);
1891         return mgp->msg_enable;
1892 }
1893
1894 static const struct ethtool_ops myri10ge_ethtool_ops = {
1895         .get_settings = myri10ge_get_settings,
1896         .get_drvinfo = myri10ge_get_drvinfo,
1897         .get_coalesce = myri10ge_get_coalesce,
1898         .set_coalesce = myri10ge_set_coalesce,
1899         .get_pauseparam = myri10ge_get_pauseparam,
1900         .set_pauseparam = myri10ge_set_pauseparam,
1901         .get_ringparam = myri10ge_get_ringparam,
1902         .get_rx_csum = myri10ge_get_rx_csum,
1903         .set_rx_csum = myri10ge_set_rx_csum,
1904         .set_tx_csum = ethtool_op_set_tx_hw_csum,
1905         .set_sg = ethtool_op_set_sg,
1906         .set_tso = myri10ge_set_tso,
1907         .get_link = ethtool_op_get_link,
1908         .get_strings = myri10ge_get_strings,
1909         .get_sset_count = myri10ge_get_sset_count,
1910         .get_ethtool_stats = myri10ge_get_ethtool_stats,
1911         .set_msglevel = myri10ge_set_msglevel,
1912         .get_msglevel = myri10ge_get_msglevel,
1913         .get_flags = ethtool_op_get_flags,
1914         .set_flags = ethtool_op_set_flags
1915 };
1916
1917 static int myri10ge_allocate_rings(struct myri10ge_slice_state *ss)
1918 {
1919         struct myri10ge_priv *mgp = ss->mgp;
1920         struct myri10ge_cmd cmd;
1921         struct net_device *dev = mgp->dev;
1922         int tx_ring_size, rx_ring_size;
1923         int tx_ring_entries, rx_ring_entries;
1924         int i, slice, status;
1925         size_t bytes;
1926
1927         /* get ring sizes */
1928         slice = ss - mgp->ss;
1929         cmd.data0 = slice;
1930         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0);
1931         tx_ring_size = cmd.data0;
1932         cmd.data0 = slice;
1933         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
1934         if (status != 0)
1935                 return status;
1936         rx_ring_size = cmd.data0;
1937
1938         tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send);
1939         rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr);
1940         ss->tx.mask = tx_ring_entries - 1;
1941         ss->rx_small.mask = ss->rx_big.mask = rx_ring_entries - 1;
1942
1943         status = -ENOMEM;
1944
1945         /* allocate the host shadow rings */
1946
1947         bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4)
1948             * sizeof(*ss->tx.req_list);
1949         ss->tx.req_bytes = kzalloc(bytes, GFP_KERNEL);
1950         if (ss->tx.req_bytes == NULL)
1951                 goto abort_with_nothing;
1952
1953         /* ensure req_list entries are aligned to 8 bytes */
1954         ss->tx.req_list = (struct mcp_kreq_ether_send *)
1955             ALIGN((unsigned long)ss->tx.req_bytes, 8);
1956         ss->tx.queue_active = 0;
1957
1958         bytes = rx_ring_entries * sizeof(*ss->rx_small.shadow);
1959         ss->rx_small.shadow = kzalloc(bytes, GFP_KERNEL);
1960         if (ss->rx_small.shadow == NULL)
1961                 goto abort_with_tx_req_bytes;
1962
1963         bytes = rx_ring_entries * sizeof(*ss->rx_big.shadow);
1964         ss->rx_big.shadow = kzalloc(bytes, GFP_KERNEL);
1965         if (ss->rx_big.shadow == NULL)
1966                 goto abort_with_rx_small_shadow;
1967
1968         /* allocate the host info rings */
1969
1970         bytes = tx_ring_entries * sizeof(*ss->tx.info);
1971         ss->tx.info = kzalloc(bytes, GFP_KERNEL);
1972         if (ss->tx.info == NULL)
1973                 goto abort_with_rx_big_shadow;
1974
1975         bytes = rx_ring_entries * sizeof(*ss->rx_small.info);
1976         ss->rx_small.info = kzalloc(bytes, GFP_KERNEL);
1977         if (ss->rx_small.info == NULL)
1978                 goto abort_with_tx_info;
1979
1980         bytes = rx_ring_entries * sizeof(*ss->rx_big.info);
1981         ss->rx_big.info = kzalloc(bytes, GFP_KERNEL);
1982         if (ss->rx_big.info == NULL)
1983                 goto abort_with_rx_small_info;
1984
1985         /* Fill the receive rings */
1986         ss->rx_big.cnt = 0;
1987         ss->rx_small.cnt = 0;
1988         ss->rx_big.fill_cnt = 0;
1989         ss->rx_small.fill_cnt = 0;
1990         ss->rx_small.page_offset = MYRI10GE_ALLOC_SIZE;
1991         ss->rx_big.page_offset = MYRI10GE_ALLOC_SIZE;
1992         ss->rx_small.watchdog_needed = 0;
1993         ss->rx_big.watchdog_needed = 0;
1994         myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
1995                                 mgp->small_bytes + MXGEFW_PAD, 0);
1996
1997         if (ss->rx_small.fill_cnt < ss->rx_small.mask + 1) {
1998                 printk(KERN_ERR
1999                        "myri10ge: %s:slice-%d: alloced only %d small bufs\n",
2000                        dev->name, slice, ss->rx_small.fill_cnt);
2001                 goto abort_with_rx_small_ring;
2002         }
2003
2004         myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
2005         if (ss->rx_big.fill_cnt < ss->rx_big.mask + 1) {
2006                 printk(KERN_ERR
2007                        "myri10ge: %s:slice-%d: alloced only %d big bufs\n",
2008                        dev->name, slice, ss->rx_big.fill_cnt);
2009                 goto abort_with_rx_big_ring;
2010         }
2011
2012         return 0;
2013
2014 abort_with_rx_big_ring:
2015         for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2016                 int idx = i & ss->rx_big.mask;
2017                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2018                                        mgp->big_bytes);
2019                 put_page(ss->rx_big.info[idx].page);
2020         }
2021
2022 abort_with_rx_small_ring:
2023         for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2024                 int idx = i & ss->rx_small.mask;
2025                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2026                                        mgp->small_bytes + MXGEFW_PAD);
2027                 put_page(ss->rx_small.info[idx].page);
2028         }
2029
2030         kfree(ss->rx_big.info);
2031
2032 abort_with_rx_small_info:
2033         kfree(ss->rx_small.info);
2034
2035 abort_with_tx_info:
2036         kfree(ss->tx.info);
2037
2038 abort_with_rx_big_shadow:
2039         kfree(ss->rx_big.shadow);
2040
2041 abort_with_rx_small_shadow:
2042         kfree(ss->rx_small.shadow);
2043
2044 abort_with_tx_req_bytes:
2045         kfree(ss->tx.req_bytes);
2046         ss->tx.req_bytes = NULL;
2047         ss->tx.req_list = NULL;
2048
2049 abort_with_nothing:
2050         return status;
2051 }
2052
2053 static void myri10ge_free_rings(struct myri10ge_slice_state *ss)
2054 {
2055         struct myri10ge_priv *mgp = ss->mgp;
2056         struct sk_buff *skb;
2057         struct myri10ge_tx_buf *tx;
2058         int i, len, idx;
2059
2060         /* If not allocated, skip it */
2061         if (ss->tx.req_list == NULL)
2062                 return;
2063
2064         for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2065                 idx = i & ss->rx_big.mask;
2066                 if (i == ss->rx_big.fill_cnt - 1)
2067                         ss->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE;
2068                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2069                                        mgp->big_bytes);
2070                 put_page(ss->rx_big.info[idx].page);
2071         }
2072
2073         for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2074                 idx = i & ss->rx_small.mask;
2075                 if (i == ss->rx_small.fill_cnt - 1)
2076                         ss->rx_small.info[idx].page_offset =
2077                             MYRI10GE_ALLOC_SIZE;
2078                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2079                                        mgp->small_bytes + MXGEFW_PAD);
2080                 put_page(ss->rx_small.info[idx].page);
2081         }
2082         tx = &ss->tx;
2083         while (tx->done != tx->req) {
2084                 idx = tx->done & tx->mask;
2085                 skb = tx->info[idx].skb;
2086
2087                 /* Mark as free */
2088                 tx->info[idx].skb = NULL;
2089                 tx->done++;
2090                 len = pci_unmap_len(&tx->info[idx], len);
2091                 pci_unmap_len_set(&tx->info[idx], len, 0);
2092                 if (skb) {
2093                         ss->stats.tx_dropped++;
2094                         dev_kfree_skb_any(skb);
2095                         if (len)
2096                                 pci_unmap_single(mgp->pdev,
2097                                                  pci_unmap_addr(&tx->info[idx],
2098                                                                 bus), len,
2099                                                  PCI_DMA_TODEVICE);
2100                 } else {
2101                         if (len)
2102                                 pci_unmap_page(mgp->pdev,
2103                                                pci_unmap_addr(&tx->info[idx],
2104                                                               bus), len,
2105                                                PCI_DMA_TODEVICE);
2106                 }
2107         }
2108         kfree(ss->rx_big.info);
2109
2110         kfree(ss->rx_small.info);
2111
2112         kfree(ss->tx.info);
2113
2114         kfree(ss->rx_big.shadow);
2115
2116         kfree(ss->rx_small.shadow);
2117
2118         kfree(ss->tx.req_bytes);
2119         ss->tx.req_bytes = NULL;
2120         ss->tx.req_list = NULL;
2121 }
2122
2123 static int myri10ge_request_irq(struct myri10ge_priv *mgp)
2124 {
2125         struct pci_dev *pdev = mgp->pdev;
2126         struct myri10ge_slice_state *ss;
2127         struct net_device *netdev = mgp->dev;
2128         int i;
2129         int status;
2130
2131         mgp->msi_enabled = 0;
2132         mgp->msix_enabled = 0;
2133         status = 0;
2134         if (myri10ge_msi) {
2135                 if (mgp->num_slices > 1) {
2136                         status =
2137                             pci_enable_msix(pdev, mgp->msix_vectors,
2138                                             mgp->num_slices);
2139                         if (status == 0) {
2140                                 mgp->msix_enabled = 1;
2141                         } else {
2142                                 dev_err(&pdev->dev,
2143                                         "Error %d setting up MSI-X\n", status);
2144                                 return status;
2145                         }
2146                 }
2147                 if (mgp->msix_enabled == 0) {
2148                         status = pci_enable_msi(pdev);
2149                         if (status != 0) {
2150                                 dev_err(&pdev->dev,
2151                                         "Error %d setting up MSI; falling back to xPIC\n",
2152                                         status);
2153                         } else {
2154                                 mgp->msi_enabled = 1;
2155                         }
2156                 }
2157         }
2158         if (mgp->msix_enabled) {
2159                 for (i = 0; i < mgp->num_slices; i++) {
2160                         ss = &mgp->ss[i];
2161                         snprintf(ss->irq_desc, sizeof(ss->irq_desc),
2162                                  "%s:slice-%d", netdev->name, i);
2163                         status = request_irq(mgp->msix_vectors[i].vector,
2164                                              myri10ge_intr, 0, ss->irq_desc,
2165                                              ss);
2166                         if (status != 0) {
2167                                 dev_err(&pdev->dev,
2168                                         "slice %d failed to allocate IRQ\n", i);
2169                                 i--;
2170                                 while (i >= 0) {
2171                                         free_irq(mgp->msix_vectors[i].vector,
2172                                                  &mgp->ss[i]);
2173                                         i--;
2174                                 }
2175                                 pci_disable_msix(pdev);
2176                                 return status;
2177                         }
2178                 }
2179         } else {
2180                 status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED,
2181                                      mgp->dev->name, &mgp->ss[0]);
2182                 if (status != 0) {
2183                         dev_err(&pdev->dev, "failed to allocate IRQ\n");
2184                         if (mgp->msi_enabled)
2185                                 pci_disable_msi(pdev);
2186                 }
2187         }
2188         return status;
2189 }
2190
2191 static void myri10ge_free_irq(struct myri10ge_priv *mgp)
2192 {
2193         struct pci_dev *pdev = mgp->pdev;
2194         int i;
2195
2196         if (mgp->msix_enabled) {
2197                 for (i = 0; i < mgp->num_slices; i++)
2198                         free_irq(mgp->msix_vectors[i].vector, &mgp->ss[i]);
2199         } else {
2200                 free_irq(pdev->irq, &mgp->ss[0]);
2201         }
2202         if (mgp->msi_enabled)
2203                 pci_disable_msi(pdev);
2204         if (mgp->msix_enabled)
2205                 pci_disable_msix(pdev);
2206 }
2207
2208 static int
2209 myri10ge_get_frag_header(struct skb_frag_struct *frag, void **mac_hdr,
2210                          void **ip_hdr, void **tcpudp_hdr,
2211                          u64 * hdr_flags, void *priv)
2212 {
2213         struct ethhdr *eh;
2214         struct vlan_ethhdr *veh;
2215         struct iphdr *iph;
2216         u8 *va = page_address(frag->page) + frag->page_offset;
2217         unsigned long ll_hlen;
2218         /* passed opaque through lro_receive_frags() */
2219         __wsum csum = (__force __wsum) (unsigned long)priv;
2220
2221         /* find the mac header, aborting if not IPv4 */
2222
2223         eh = (struct ethhdr *)va;
2224         *mac_hdr = eh;
2225         ll_hlen = ETH_HLEN;
2226         if (eh->h_proto != htons(ETH_P_IP)) {
2227                 if (eh->h_proto == htons(ETH_P_8021Q)) {
2228                         veh = (struct vlan_ethhdr *)va;
2229                         if (veh->h_vlan_encapsulated_proto != htons(ETH_P_IP))
2230                                 return -1;
2231
2232                         ll_hlen += VLAN_HLEN;
2233
2234                         /*
2235                          *  HW checksum starts ETH_HLEN bytes into
2236                          *  frame, so we must subtract off the VLAN
2237                          *  header's checksum before csum can be used
2238                          */
2239                         csum = csum_sub(csum, csum_partial(va + ETH_HLEN,
2240                                                            VLAN_HLEN, 0));
2241                 } else {
2242                         return -1;
2243                 }
2244         }
2245         *hdr_flags = LRO_IPV4;
2246
2247         iph = (struct iphdr *)(va + ll_hlen);
2248         *ip_hdr = iph;
2249         if (iph->protocol != IPPROTO_TCP)
2250                 return -1;
2251         if (iph->frag_off & htons(IP_MF | IP_OFFSET))
2252                 return -1;
2253         *hdr_flags |= LRO_TCP;
2254         *tcpudp_hdr = (u8 *) (*ip_hdr) + (iph->ihl << 2);
2255
2256         /* verify the IP checksum */
2257         if (unlikely(ip_fast_csum((u8 *) iph, iph->ihl)))
2258                 return -1;
2259
2260         /* verify the  checksum */
2261         if (unlikely(csum_tcpudp_magic(iph->saddr, iph->daddr,
2262                                        ntohs(iph->tot_len) - (iph->ihl << 2),
2263                                        IPPROTO_TCP, csum)))
2264                 return -1;
2265
2266         return 0;
2267 }
2268
2269 static int myri10ge_get_txrx(struct myri10ge_priv *mgp, int slice)
2270 {
2271         struct myri10ge_cmd cmd;
2272         struct myri10ge_slice_state *ss;
2273         int status;
2274
2275         ss = &mgp->ss[slice];
2276         status = 0;
2277         if (slice == 0 || (mgp->dev->real_num_tx_queues > 1)) {
2278                 cmd.data0 = slice;
2279                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET,
2280                                            &cmd, 0);
2281                 ss->tx.lanai = (struct mcp_kreq_ether_send __iomem *)
2282                     (mgp->sram + cmd.data0);
2283         }
2284         cmd.data0 = slice;
2285         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET,
2286                                     &cmd, 0);
2287         ss->rx_small.lanai = (struct mcp_kreq_ether_recv __iomem *)
2288             (mgp->sram + cmd.data0);
2289
2290         cmd.data0 = slice;
2291         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0);
2292         ss->rx_big.lanai = (struct mcp_kreq_ether_recv __iomem *)
2293             (mgp->sram + cmd.data0);
2294
2295         ss->tx.send_go = (__iomem __be32 *)
2296             (mgp->sram + MXGEFW_ETH_SEND_GO + 64 * slice);
2297         ss->tx.send_stop = (__iomem __be32 *)
2298             (mgp->sram + MXGEFW_ETH_SEND_STOP + 64 * slice);
2299         return status;
2300
2301 }
2302
2303 static int myri10ge_set_stats(struct myri10ge_priv *mgp, int slice)
2304 {
2305         struct myri10ge_cmd cmd;
2306         struct myri10ge_slice_state *ss;
2307         int status;
2308
2309         ss = &mgp->ss[slice];
2310         cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->fw_stats_bus);
2311         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->fw_stats_bus);
2312         cmd.data2 = sizeof(struct mcp_irq_data) | (slice << 16);
2313         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0);
2314         if (status == -ENOSYS) {
2315                 dma_addr_t bus = ss->fw_stats_bus;
2316                 if (slice != 0)
2317                         return -EINVAL;
2318                 bus += offsetof(struct mcp_irq_data, send_done_count);
2319                 cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus);
2320                 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus);
2321                 status = myri10ge_send_cmd(mgp,
2322                                            MXGEFW_CMD_SET_STATS_DMA_OBSOLETE,
2323                                            &cmd, 0);
2324                 /* Firmware cannot support multicast without STATS_DMA_V2 */
2325                 mgp->fw_multicast_support = 0;
2326         } else {
2327                 mgp->fw_multicast_support = 1;
2328         }
2329         return 0;
2330 }
2331
2332 static int myri10ge_open(struct net_device *dev)
2333 {
2334         struct myri10ge_slice_state *ss;
2335         struct myri10ge_priv *mgp = netdev_priv(dev);
2336         struct myri10ge_cmd cmd;
2337         int i, status, big_pow2, slice;
2338         u8 *itable;
2339         struct net_lro_mgr *lro_mgr;
2340
2341         if (mgp->running != MYRI10GE_ETH_STOPPED)
2342                 return -EBUSY;
2343
2344         mgp->running = MYRI10GE_ETH_STARTING;
2345         status = myri10ge_reset(mgp);
2346         if (status != 0) {
2347                 printk(KERN_ERR "myri10ge: %s: failed reset\n", dev->name);
2348                 goto abort_with_nothing;
2349         }
2350
2351         if (mgp->num_slices > 1) {
2352                 cmd.data0 = mgp->num_slices;
2353                 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
2354                 if (mgp->dev->real_num_tx_queues > 1)
2355                         cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
2356                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
2357                                            &cmd, 0);
2358                 if (status != 0) {
2359                         printk(KERN_ERR
2360                                "myri10ge: %s: failed to set number of slices\n",
2361                                dev->name);
2362                         goto abort_with_nothing;
2363                 }
2364                 /* setup the indirection table */
2365                 cmd.data0 = mgp->num_slices;
2366                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_TABLE_SIZE,
2367                                            &cmd, 0);
2368
2369                 status |= myri10ge_send_cmd(mgp,
2370                                             MXGEFW_CMD_GET_RSS_TABLE_OFFSET,
2371                                             &cmd, 0);
2372                 if (status != 0) {
2373                         printk(KERN_ERR
2374                                "myri10ge: %s: failed to setup rss tables\n",
2375                                dev->name);
2376                         goto abort_with_nothing;
2377                 }
2378
2379                 /* just enable an identity mapping */
2380                 itable = mgp->sram + cmd.data0;
2381                 for (i = 0; i < mgp->num_slices; i++)
2382                         __raw_writeb(i, &itable[i]);
2383
2384                 cmd.data0 = 1;
2385                 cmd.data1 = myri10ge_rss_hash;
2386                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_ENABLE,
2387                                            &cmd, 0);
2388                 if (status != 0) {
2389                         printk(KERN_ERR
2390                                "myri10ge: %s: failed to enable slices\n",
2391                                dev->name);
2392                         goto abort_with_nothing;
2393                 }
2394         }
2395
2396         status = myri10ge_request_irq(mgp);
2397         if (status != 0)
2398                 goto abort_with_nothing;
2399
2400         /* decide what small buffer size to use.  For good TCP rx
2401          * performance, it is important to not receive 1514 byte
2402          * frames into jumbo buffers, as it confuses the socket buffer
2403          * accounting code, leading to drops and erratic performance.
2404          */
2405
2406         if (dev->mtu <= ETH_DATA_LEN)
2407                 /* enough for a TCP header */
2408                 mgp->small_bytes = (128 > SMP_CACHE_BYTES)
2409                     ? (128 - MXGEFW_PAD)
2410                     : (SMP_CACHE_BYTES - MXGEFW_PAD);
2411         else
2412                 /* enough for a vlan encapsulated ETH_DATA_LEN frame */
2413                 mgp->small_bytes = VLAN_ETH_FRAME_LEN;
2414
2415         /* Override the small buffer size? */
2416         if (myri10ge_small_bytes > 0)
2417                 mgp->small_bytes = myri10ge_small_bytes;
2418
2419         /* Firmware needs the big buff size as a power of 2.  Lie and
2420          * tell him the buffer is larger, because we only use 1
2421          * buffer/pkt, and the mtu will prevent overruns.
2422          */
2423         big_pow2 = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2424         if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) {
2425                 while (!is_power_of_2(big_pow2))
2426                         big_pow2++;
2427                 mgp->big_bytes = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2428         } else {
2429                 big_pow2 = MYRI10GE_ALLOC_SIZE;
2430                 mgp->big_bytes = big_pow2;
2431         }
2432
2433         /* setup the per-slice data structures */
2434         for (slice = 0; slice < mgp->num_slices; slice++) {
2435                 ss = &mgp->ss[slice];
2436
2437                 status = myri10ge_get_txrx(mgp, slice);
2438                 if (status != 0) {
2439                         printk(KERN_ERR
2440                                "myri10ge: %s: failed to get ring sizes or locations\n",
2441                                dev->name);
2442                         goto abort_with_rings;
2443                 }
2444                 status = myri10ge_allocate_rings(ss);
2445                 if (status != 0)
2446                         goto abort_with_rings;
2447
2448                 /* only firmware which supports multiple TX queues
2449                  * supports setting up the tx stats on non-zero
2450                  * slices */
2451                 if (slice == 0 || mgp->dev->real_num_tx_queues > 1)
2452                         status = myri10ge_set_stats(mgp, slice);
2453                 if (status) {
2454                         printk(KERN_ERR
2455                                "myri10ge: %s: Couldn't set stats DMA\n",
2456                                dev->name);
2457                         goto abort_with_rings;
2458                 }
2459
2460                 lro_mgr = &ss->rx_done.lro_mgr;
2461                 lro_mgr->dev = dev;
2462                 lro_mgr->features = LRO_F_NAPI;
2463                 lro_mgr->ip_summed = CHECKSUM_COMPLETE;
2464                 lro_mgr->ip_summed_aggr = CHECKSUM_UNNECESSARY;
2465                 lro_mgr->max_desc = MYRI10GE_MAX_LRO_DESCRIPTORS;
2466                 lro_mgr->lro_arr = ss->rx_done.lro_desc;
2467                 lro_mgr->get_frag_header = myri10ge_get_frag_header;
2468                 lro_mgr->max_aggr = myri10ge_lro_max_pkts;
2469                 lro_mgr->frag_align_pad = 2;
2470                 if (lro_mgr->max_aggr > MAX_SKB_FRAGS)
2471                         lro_mgr->max_aggr = MAX_SKB_FRAGS;
2472
2473                 /* must happen prior to any irq */
2474                 napi_enable(&(ss)->napi);
2475         }
2476
2477         /* now give firmware buffers sizes, and MTU */
2478         cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
2479         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0);
2480         cmd.data0 = mgp->small_bytes;
2481         status |=
2482             myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0);
2483         cmd.data0 = big_pow2;
2484         status |=
2485             myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0);
2486         if (status) {
2487                 printk(KERN_ERR "myri10ge: %s: Couldn't set buffer sizes\n",
2488                        dev->name);
2489                 goto abort_with_rings;
2490         }
2491
2492         /*
2493          * Set Linux style TSO mode; this is needed only on newer
2494          *  firmware versions.  Older versions default to Linux
2495          *  style TSO
2496          */
2497         cmd.data0 = 0;
2498         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_TSO_MODE, &cmd, 0);
2499         if (status && status != -ENOSYS) {
2500                 printk(KERN_ERR "myri10ge: %s: Couldn't set TSO mode\n",
2501                        dev->name);
2502                 goto abort_with_rings;
2503         }
2504
2505         mgp->link_state = ~0U;
2506         mgp->rdma_tags_available = 15;
2507
2508         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0);
2509         if (status) {
2510                 printk(KERN_ERR "myri10ge: %s: Couldn't bring up link\n",
2511                        dev->name);
2512                 goto abort_with_rings;
2513         }
2514
2515         mgp->running = MYRI10GE_ETH_RUNNING;
2516         mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ;
2517         add_timer(&mgp->watchdog_timer);
2518         netif_tx_wake_all_queues(dev);
2519
2520         return 0;
2521
2522 abort_with_rings:
2523         while (slice) {
2524                 slice--;
2525                 napi_disable(&mgp->ss[slice].napi);
2526         }
2527         for (i = 0; i < mgp->num_slices; i++)
2528                 myri10ge_free_rings(&mgp->ss[i]);
2529
2530         myri10ge_free_irq(mgp);
2531
2532 abort_with_nothing:
2533         mgp->running = MYRI10GE_ETH_STOPPED;
2534         return -ENOMEM;
2535 }
2536
2537 static int myri10ge_close(struct net_device *dev)
2538 {
2539         struct myri10ge_priv *mgp = netdev_priv(dev);
2540         struct myri10ge_cmd cmd;
2541         int status, old_down_cnt;
2542         int i;
2543
2544         if (mgp->running != MYRI10GE_ETH_RUNNING)
2545                 return 0;
2546
2547         if (mgp->ss[0].tx.req_bytes == NULL)
2548                 return 0;
2549
2550         del_timer_sync(&mgp->watchdog_timer);
2551         mgp->running = MYRI10GE_ETH_STOPPING;
2552         for (i = 0; i < mgp->num_slices; i++) {
2553                 napi_disable(&mgp->ss[i].napi);
2554         }
2555         netif_carrier_off(dev);
2556
2557         netif_tx_stop_all_queues(dev);
2558         if (mgp->rebooted == 0) {
2559                 old_down_cnt = mgp->down_cnt;
2560                 mb();
2561                 status =
2562                     myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0);
2563                 if (status)
2564                         printk(KERN_ERR
2565                                "myri10ge: %s: Couldn't bring down link\n",
2566                                dev->name);
2567
2568                 wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt,
2569                                    HZ);
2570                 if (old_down_cnt == mgp->down_cnt)
2571                         printk(KERN_ERR "myri10ge: %s never got down irq\n",
2572                                dev->name);
2573         }
2574         netif_tx_disable(dev);
2575         myri10ge_free_irq(mgp);
2576         for (i = 0; i < mgp->num_slices; i++)
2577                 myri10ge_free_rings(&mgp->ss[i]);
2578
2579         mgp->running = MYRI10GE_ETH_STOPPED;
2580         return 0;
2581 }
2582
2583 /* copy an array of struct mcp_kreq_ether_send's to the mcp.  Copy
2584  * backwards one at a time and handle ring wraps */
2585
2586 static inline void
2587 myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx,
2588                               struct mcp_kreq_ether_send *src, int cnt)
2589 {
2590         int idx, starting_slot;
2591         starting_slot = tx->req;
2592         while (cnt > 1) {
2593                 cnt--;
2594                 idx = (starting_slot + cnt) & tx->mask;
2595                 myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src));
2596                 mb();
2597         }
2598 }
2599
2600 /*
2601  * copy an array of struct mcp_kreq_ether_send's to the mcp.  Copy
2602  * at most 32 bytes at a time, so as to avoid involving the software
2603  * pio handler in the nic.   We re-write the first segment's flags
2604  * to mark them valid only after writing the entire chain.
2605  */
2606
2607 static inline void
2608 myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src,
2609                     int cnt)
2610 {
2611         int idx, i;
2612         struct mcp_kreq_ether_send __iomem *dstp, *dst;
2613         struct mcp_kreq_ether_send *srcp;
2614         u8 last_flags;
2615
2616         idx = tx->req & tx->mask;
2617
2618         last_flags = src->flags;
2619         src->flags = 0;
2620         mb();
2621         dst = dstp = &tx->lanai[idx];
2622         srcp = src;
2623
2624         if ((idx + cnt) < tx->mask) {
2625                 for (i = 0; i < (cnt - 1); i += 2) {
2626                         myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src));
2627                         mb();   /* force write every 32 bytes */
2628                         srcp += 2;
2629                         dstp += 2;
2630                 }
2631         } else {
2632                 /* submit all but the first request, and ensure
2633                  * that it is submitted below */
2634                 myri10ge_submit_req_backwards(tx, src, cnt);
2635                 i = 0;
2636         }
2637         if (i < cnt) {
2638                 /* submit the first request */
2639                 myri10ge_pio_copy(dstp, srcp, sizeof(*src));
2640                 mb();           /* barrier before setting valid flag */
2641         }
2642
2643         /* re-write the last 32-bits with the valid flags */
2644         src->flags = last_flags;
2645         put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3);
2646         tx->req += cnt;
2647         mb();
2648 }
2649
2650 /*
2651  * Transmit a packet.  We need to split the packet so that a single
2652  * segment does not cross myri10ge->tx_boundary, so this makes segment
2653  * counting tricky.  So rather than try to count segments up front, we
2654  * just give up if there are too few segments to hold a reasonably
2655  * fragmented packet currently available.  If we run
2656  * out of segments while preparing a packet for DMA, we just linearize
2657  * it and try again.
2658  */
2659
2660 static netdev_tx_t myri10ge_xmit(struct sk_buff *skb,
2661                                        struct net_device *dev)
2662 {
2663         struct myri10ge_priv *mgp = netdev_priv(dev);
2664         struct myri10ge_slice_state *ss;
2665         struct mcp_kreq_ether_send *req;
2666         struct myri10ge_tx_buf *tx;
2667         struct skb_frag_struct *frag;
2668         struct netdev_queue *netdev_queue;
2669         dma_addr_t bus;
2670         u32 low;
2671         __be32 high_swapped;
2672         unsigned int len;
2673         int idx, last_idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
2674         u16 pseudo_hdr_offset, cksum_offset, queue;
2675         int cum_len, seglen, boundary, rdma_count;
2676         u8 flags, odd_flag;
2677
2678         queue = skb_get_queue_mapping(skb);
2679         ss = &mgp->ss[queue];
2680         netdev_queue = netdev_get_tx_queue(mgp->dev, queue);
2681         tx = &ss->tx;
2682
2683 again:
2684         req = tx->req_list;
2685         avail = tx->mask - 1 - (tx->req - tx->done);
2686
2687         mss = 0;
2688         max_segments = MXGEFW_MAX_SEND_DESC;
2689
2690         if (skb_is_gso(skb)) {
2691                 mss = skb_shinfo(skb)->gso_size;
2692                 max_segments = MYRI10GE_MAX_SEND_DESC_TSO;
2693         }
2694
2695         if ((unlikely(avail < max_segments))) {
2696                 /* we are out of transmit resources */
2697                 tx->stop_queue++;
2698                 netif_tx_stop_queue(netdev_queue);
2699                 return NETDEV_TX_BUSY;
2700         }
2701
2702         /* Setup checksum offloading, if needed */
2703         cksum_offset = 0;
2704         pseudo_hdr_offset = 0;
2705         odd_flag = 0;
2706         flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
2707         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2708                 cksum_offset = skb_transport_offset(skb);
2709                 pseudo_hdr_offset = cksum_offset + skb->csum_offset;
2710                 /* If the headers are excessively large, then we must
2711                  * fall back to a software checksum */
2712                 if (unlikely(!mss && (cksum_offset > 255 ||
2713                                       pseudo_hdr_offset > 127))) {
2714                         if (skb_checksum_help(skb))
2715                                 goto drop;
2716                         cksum_offset = 0;
2717                         pseudo_hdr_offset = 0;
2718                 } else {
2719                         odd_flag = MXGEFW_FLAGS_ALIGN_ODD;
2720                         flags |= MXGEFW_FLAGS_CKSUM;
2721                 }
2722         }
2723
2724         cum_len = 0;
2725
2726         if (mss) {              /* TSO */
2727                 /* this removes any CKSUM flag from before */
2728                 flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST);
2729
2730                 /* negative cum_len signifies to the
2731                  * send loop that we are still in the
2732                  * header portion of the TSO packet.
2733                  * TSO header can be at most 1KB long */
2734                 cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb));
2735
2736                 /* for IPv6 TSO, the checksum offset stores the
2737                  * TCP header length, to save the firmware from
2738                  * the need to parse the headers */
2739                 if (skb_is_gso_v6(skb)) {
2740                         cksum_offset = tcp_hdrlen(skb);
2741                         /* Can only handle headers <= max_tso6 long */
2742                         if (unlikely(-cum_len > mgp->max_tso6))
2743                                 return myri10ge_sw_tso(skb, dev);
2744                 }
2745                 /* for TSO, pseudo_hdr_offset holds mss.
2746                  * The firmware figures out where to put
2747                  * the checksum by parsing the header. */
2748                 pseudo_hdr_offset = mss;
2749         } else
2750                 /* Mark small packets, and pad out tiny packets */
2751         if (skb->len <= MXGEFW_SEND_SMALL_SIZE) {
2752                 flags |= MXGEFW_FLAGS_SMALL;
2753
2754                 /* pad frames to at least ETH_ZLEN bytes */
2755                 if (unlikely(skb->len < ETH_ZLEN)) {
2756                         if (skb_padto(skb, ETH_ZLEN)) {
2757                                 /* The packet is gone, so we must
2758                                  * return 0 */
2759                                 ss->stats.tx_dropped += 1;
2760                                 return NETDEV_TX_OK;
2761                         }
2762                         /* adjust the len to account for the zero pad
2763                          * so that the nic can know how long it is */
2764                         skb->len = ETH_ZLEN;
2765                 }
2766         }
2767
2768         /* map the skb for DMA */
2769         len = skb->len - skb->data_len;
2770         idx = tx->req & tx->mask;
2771         tx->info[idx].skb = skb;
2772         bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE);
2773         pci_unmap_addr_set(&tx->info[idx], bus, bus);
2774         pci_unmap_len_set(&tx->info[idx], len, len);
2775
2776         frag_cnt = skb_shinfo(skb)->nr_frags;
2777         frag_idx = 0;
2778         count = 0;
2779         rdma_count = 0;
2780
2781         /* "rdma_count" is the number of RDMAs belonging to the
2782          * current packet BEFORE the current send request. For
2783          * non-TSO packets, this is equal to "count".
2784          * For TSO packets, rdma_count needs to be reset
2785          * to 0 after a segment cut.
2786          *
2787          * The rdma_count field of the send request is
2788          * the number of RDMAs of the packet starting at
2789          * that request. For TSO send requests with one ore more cuts
2790          * in the middle, this is the number of RDMAs starting
2791          * after the last cut in the request. All previous
2792          * segments before the last cut implicitly have 1 RDMA.
2793          *
2794          * Since the number of RDMAs is not known beforehand,
2795          * it must be filled-in retroactively - after each
2796          * segmentation cut or at the end of the entire packet.
2797          */
2798
2799         while (1) {
2800                 /* Break the SKB or Fragment up into pieces which
2801                  * do not cross mgp->tx_boundary */
2802                 low = MYRI10GE_LOWPART_TO_U32(bus);
2803                 high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
2804                 while (len) {
2805                         u8 flags_next;
2806                         int cum_len_next;
2807
2808                         if (unlikely(count == max_segments))
2809                                 goto abort_linearize;
2810
2811                         boundary =
2812                             (low + mgp->tx_boundary) & ~(mgp->tx_boundary - 1);
2813                         seglen = boundary - low;
2814                         if (seglen > len)
2815                                 seglen = len;
2816                         flags_next = flags & ~MXGEFW_FLAGS_FIRST;
2817                         cum_len_next = cum_len + seglen;
2818                         if (mss) {      /* TSO */
2819                                 (req - rdma_count)->rdma_count = rdma_count + 1;
2820
2821                                 if (likely(cum_len >= 0)) {     /* payload */
2822                                         int next_is_first, chop;
2823
2824                                         chop = (cum_len_next > mss);
2825                                         cum_len_next = cum_len_next % mss;
2826                                         next_is_first = (cum_len_next == 0);
2827                                         flags |= chop * MXGEFW_FLAGS_TSO_CHOP;
2828                                         flags_next |= next_is_first *
2829                                             MXGEFW_FLAGS_FIRST;
2830                                         rdma_count |= -(chop | next_is_first);
2831                                         rdma_count += chop & !next_is_first;
2832                                 } else if (likely(cum_len_next >= 0)) { /* header ends */
2833                                         int small;
2834
2835                                         rdma_count = -1;
2836                                         cum_len_next = 0;
2837                                         seglen = -cum_len;
2838                                         small = (mss <= MXGEFW_SEND_SMALL_SIZE);
2839                                         flags_next = MXGEFW_FLAGS_TSO_PLD |
2840                                             MXGEFW_FLAGS_FIRST |
2841                                             (small * MXGEFW_FLAGS_SMALL);
2842                                 }
2843                         }
2844                         req->addr_high = high_swapped;
2845                         req->addr_low = htonl(low);
2846                         req->pseudo_hdr_offset = htons(pseudo_hdr_offset);
2847                         req->pad = 0;   /* complete solid 16-byte block; does this matter? */
2848                         req->rdma_count = 1;
2849                         req->length = htons(seglen);
2850                         req->cksum_offset = cksum_offset;
2851                         req->flags = flags | ((cum_len & 1) * odd_flag);
2852
2853                         low += seglen;
2854                         len -= seglen;
2855                         cum_len = cum_len_next;
2856                         flags = flags_next;
2857                         req++;
2858                         count++;
2859                         rdma_count++;
2860                         if (cksum_offset != 0 && !(mss && skb_is_gso_v6(skb))) {
2861                                 if (unlikely(cksum_offset > seglen))
2862                                         cksum_offset -= seglen;
2863                                 else
2864                                         cksum_offset = 0;
2865                         }
2866                 }
2867                 if (frag_idx == frag_cnt)
2868                         break;
2869
2870                 /* map next fragment for DMA */
2871                 idx = (count + tx->req) & tx->mask;
2872                 frag = &skb_shinfo(skb)->frags[frag_idx];
2873                 frag_idx++;
2874                 len = frag->size;
2875                 bus = pci_map_page(mgp->pdev, frag->page, frag->page_offset,
2876                                    len, PCI_DMA_TODEVICE);
2877                 pci_unmap_addr_set(&tx->info[idx], bus, bus);
2878                 pci_unmap_len_set(&tx->info[idx], len, len);
2879         }
2880
2881         (req - rdma_count)->rdma_count = rdma_count;
2882         if (mss)
2883                 do {
2884                         req--;
2885                         req->flags |= MXGEFW_FLAGS_TSO_LAST;
2886                 } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP |
2887                                          MXGEFW_FLAGS_FIRST)));
2888         idx = ((count - 1) + tx->req) & tx->mask;
2889         tx->info[idx].last = 1;
2890         myri10ge_submit_req(tx, tx->req_list, count);
2891         /* if using multiple tx queues, make sure NIC polls the
2892          * current slice */
2893         if ((mgp->dev->real_num_tx_queues > 1) && tx->queue_active == 0) {
2894                 tx->queue_active = 1;
2895                 put_be32(htonl(1), tx->send_go);
2896                 mb();
2897                 mmiowb();
2898         }
2899         tx->pkt_start++;
2900         if ((avail - count) < MXGEFW_MAX_SEND_DESC) {
2901                 tx->stop_queue++;
2902                 netif_tx_stop_queue(netdev_queue);
2903         }
2904         return NETDEV_TX_OK;
2905
2906 abort_linearize:
2907         /* Free any DMA resources we've alloced and clear out the skb
2908          * slot so as to not trip up assertions, and to avoid a
2909          * double-free if linearizing fails */
2910
2911         last_idx = (idx + 1) & tx->mask;
2912         idx = tx->req & tx->mask;
2913         tx->info[idx].skb = NULL;
2914         do {
2915                 len = pci_unmap_len(&tx->info[idx], len);
2916                 if (len) {
2917                         if (tx->info[idx].skb != NULL)
2918                                 pci_unmap_single(mgp->pdev,
2919                                                  pci_unmap_addr(&tx->info[idx],
2920                                                                 bus), len,
2921                                                  PCI_DMA_TODEVICE);
2922                         else
2923                                 pci_unmap_page(mgp->pdev,
2924                                                pci_unmap_addr(&tx->info[idx],
2925                                                               bus), len,
2926                                                PCI_DMA_TODEVICE);
2927                         pci_unmap_len_set(&tx->info[idx], len, 0);
2928                         tx->info[idx].skb = NULL;
2929                 }
2930                 idx = (idx + 1) & tx->mask;
2931         } while (idx != last_idx);
2932         if (skb_is_gso(skb)) {
2933                 printk(KERN_ERR
2934                        "myri10ge: %s: TSO but wanted to linearize?!?!?\n",
2935                        mgp->dev->name);
2936                 goto drop;
2937         }
2938
2939         if (skb_linearize(skb))
2940                 goto drop;
2941
2942         tx->linearized++;
2943         goto again;
2944
2945 drop:
2946         dev_kfree_skb_any(skb);
2947         ss->stats.tx_dropped += 1;
2948         return NETDEV_TX_OK;
2949
2950 }
2951
2952 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
2953                                          struct net_device *dev)
2954 {
2955         struct sk_buff *segs, *curr;
2956         struct myri10ge_priv *mgp = netdev_priv(dev);
2957         struct myri10ge_slice_state *ss;
2958         netdev_tx_t status;
2959
2960         segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO6);
2961         if (IS_ERR(segs))
2962                 goto drop;
2963
2964         while (segs) {
2965                 curr = segs;
2966                 segs = segs->next;
2967                 curr->next = NULL;
2968                 status = myri10ge_xmit(curr, dev);
2969                 if (status != 0) {
2970                         dev_kfree_skb_any(curr);
2971                         if (segs != NULL) {
2972                                 curr = segs;
2973                                 segs = segs->next;
2974                                 curr->next = NULL;
2975                                 dev_kfree_skb_any(segs);
2976                         }
2977                         goto drop;
2978                 }
2979         }
2980         dev_kfree_skb_any(skb);
2981         return NETDEV_TX_OK;
2982
2983 drop:
2984         ss = &mgp->ss[skb_get_queue_mapping(skb)];
2985         dev_kfree_skb_any(skb);
2986         ss->stats.tx_dropped += 1;
2987         return NETDEV_TX_OK;
2988 }
2989
2990 static struct net_device_stats *myri10ge_get_stats(struct net_device *dev)
2991 {
2992         struct myri10ge_priv *mgp = netdev_priv(dev);
2993         struct myri10ge_slice_netstats *slice_stats;
2994         struct net_device_stats *stats = &mgp->stats;
2995         int i;
2996
2997         spin_lock(&mgp->stats_lock);
2998         memset(stats, 0, sizeof(*stats));
2999         for (i = 0; i < mgp->num_slices; i++) {
3000                 slice_stats = &mgp->ss[i].stats;
3001                 stats->rx_packets += slice_stats->rx_packets;
3002                 stats->tx_packets += slice_stats->tx_packets;
3003                 stats->rx_bytes += slice_stats->rx_bytes;
3004                 stats->tx_bytes += slice_stats->tx_bytes;
3005                 stats->rx_dropped += slice_stats->rx_dropped;
3006                 stats->tx_dropped += slice_stats->tx_dropped;
3007         }
3008         spin_unlock(&mgp->stats_lock);
3009         return stats;
3010 }
3011
3012 static void myri10ge_set_multicast_list(struct net_device *dev)
3013 {
3014         struct myri10ge_priv *mgp = netdev_priv(dev);
3015         struct myri10ge_cmd cmd;
3016         struct dev_mc_list *mc_list;
3017         __be32 data[2] = { 0, 0 };
3018         int err;
3019
3020         /* can be called from atomic contexts,
3021          * pass 1 to force atomicity in myri10ge_send_cmd() */
3022         myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1);
3023
3024         /* This firmware is known to not support multicast */
3025         if (!mgp->fw_multicast_support)
3026                 return;
3027
3028         /* Disable multicast filtering */
3029
3030         err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1);
3031         if (err != 0) {
3032                 printk(KERN_ERR "myri10ge: %s: Failed MXGEFW_ENABLE_ALLMULTI,"
3033                        " error status: %d\n", dev->name, err);
3034                 goto abort;
3035         }
3036
3037         if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) {
3038                 /* request to disable multicast filtering, so quit here */
3039                 return;
3040         }
3041
3042         /* Flush the filters */
3043
3044         err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS,
3045                                 &cmd, 1);
3046         if (err != 0) {
3047                 printk(KERN_ERR
3048                        "myri10ge: %s: Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS"
3049                        ", error status: %d\n", dev->name, err);
3050                 goto abort;
3051         }
3052
3053         /* Walk the multicast list, and add each address */
3054         for (mc_list = dev->mc_list; mc_list != NULL; mc_list = mc_list->next) {
3055                 memcpy(data, &mc_list->dmi_addr, 6);
3056                 cmd.data0 = ntohl(data[0]);
3057                 cmd.data1 = ntohl(data[1]);
3058                 err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP,
3059                                         &cmd, 1);
3060
3061                 if (err != 0) {
3062                         printk(KERN_ERR "myri10ge: %s: Failed "
3063                                "MXGEFW_JOIN_MULTICAST_GROUP, error status:"
3064                                "%d\t", dev->name, err);
3065                         printk(KERN_ERR "MAC %pM\n", mc_list->dmi_addr);
3066                         goto abort;
3067                 }
3068         }
3069         /* Enable multicast filtering */
3070         err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1);
3071         if (err != 0) {
3072                 printk(KERN_ERR "myri10ge: %s: Failed MXGEFW_DISABLE_ALLMULTI,"
3073                        "error status: %d\n", dev->name, err);
3074                 goto abort;
3075         }
3076
3077         return;
3078
3079 abort:
3080         return;
3081 }
3082
3083 static int myri10ge_set_mac_address(struct net_device *dev, void *addr)
3084 {
3085         struct sockaddr *sa = addr;
3086         struct myri10ge_priv *mgp = netdev_priv(dev);
3087         int status;
3088
3089         if (!is_valid_ether_addr(sa->sa_data))
3090                 return -EADDRNOTAVAIL;
3091
3092         status = myri10ge_update_mac_address(mgp, sa->sa_data);
3093         if (status != 0) {
3094                 printk(KERN_ERR
3095                        "myri10ge: %s: changing mac address failed with %d\n",
3096                        dev->name, status);
3097                 return status;
3098         }
3099
3100         /* change the dev structure */
3101         memcpy(dev->dev_addr, sa->sa_data, 6);
3102         return 0;
3103 }
3104
3105 static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
3106 {
3107         struct myri10ge_priv *mgp = netdev_priv(dev);
3108         int error = 0;
3109
3110         if ((new_mtu < 68) || (ETH_HLEN + new_mtu > MYRI10GE_MAX_ETHER_MTU)) {
3111                 printk(KERN_ERR "myri10ge: %s: new mtu (%d) is not valid\n",
3112                        dev->name, new_mtu);
3113                 return -EINVAL;
3114         }
3115         printk(KERN_INFO "%s: changing mtu from %d to %d\n",
3116                dev->name, dev->mtu, new_mtu);
3117         if (mgp->running) {
3118                 /* if we change the mtu on an active device, we must
3119                  * reset the device so the firmware sees the change */
3120                 myri10ge_close(dev);
3121                 dev->mtu = new_mtu;
3122                 myri10ge_open(dev);
3123         } else
3124                 dev->mtu = new_mtu;
3125
3126         return error;
3127 }
3128
3129 /*
3130  * Enable ECRC to align PCI-E Completion packets on an 8-byte boundary.
3131  * Only do it if the bridge is a root port since we don't want to disturb
3132  * any other device, except if forced with myri10ge_ecrc_enable > 1.
3133  */
3134
3135 static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
3136 {
3137         struct pci_dev *bridge = mgp->pdev->bus->self;
3138         struct device *dev = &mgp->pdev->dev;
3139         unsigned cap;
3140         unsigned err_cap;
3141         u16 val;
3142         u8 ext_type;
3143         int ret;
3144
3145         if (!myri10ge_ecrc_enable || !bridge)
3146                 return;
3147
3148         /* check that the bridge is a root port */
3149         cap = pci_find_capability(bridge, PCI_CAP_ID_EXP);
3150         pci_read_config_word(bridge, cap + PCI_CAP_FLAGS, &val);
3151         ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
3152         if (ext_type != PCI_EXP_TYPE_ROOT_PORT) {
3153                 if (myri10ge_ecrc_enable > 1) {
3154                         struct pci_dev *prev_bridge, *old_bridge = bridge;
3155
3156                         /* Walk the hierarchy up to the root port
3157                          * where ECRC has to be enabled */
3158                         do {
3159                                 prev_bridge = bridge;
3160                                 bridge = bridge->bus->self;
3161                                 if (!bridge || prev_bridge == bridge) {
3162                                         dev_err(dev,
3163                                                 "Failed to find root port"
3164                                                 " to force ECRC\n");
3165                                         return;
3166                                 }
3167                                 cap =
3168                                     pci_find_capability(bridge, PCI_CAP_ID_EXP);
3169                                 pci_read_config_word(bridge,
3170                                                      cap + PCI_CAP_FLAGS, &val);
3171                                 ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
3172                         } while (ext_type != PCI_EXP_TYPE_ROOT_PORT);
3173
3174                         dev_info(dev,
3175                                  "Forcing ECRC on non-root port %s"
3176                                  " (enabling on root port %s)\n",
3177                                  pci_name(old_bridge), pci_name(bridge));
3178                 } else {
3179                         dev_err(dev,
3180                                 "Not enabling ECRC on non-root port %s\n",
3181                                 pci_name(bridge));
3182                         return;
3183                 }
3184         }
3185
3186         cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
3187         if (!cap)
3188                 return;
3189
3190         ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap);
3191         if (ret) {
3192                 dev_err(dev, "failed reading ext-conf-space of %s\n",
3193                         pci_name(bridge));
3194                 dev_err(dev, "\t pci=nommconf in use? "
3195                         "or buggy/incomplete/absent ACPI MCFG attr?\n");
3196                 return;
3197         }
3198         if (!(err_cap & PCI_ERR_CAP_ECRC_GENC))
3199                 return;
3200
3201         err_cap |= PCI_ERR_CAP_ECRC_GENE;
3202         pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap);
3203         dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge));
3204 }
3205
3206 /*
3207  * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput
3208  * when the PCI-E Completion packets are aligned on an 8-byte
3209  * boundary.  Some PCI-E chip sets always align Completion packets; on
3210  * the ones that do not, the alignment can be enforced by enabling
3211  * ECRC generation (if supported).
3212  *
3213  * When PCI-E Completion packets are not aligned, it is actually more
3214  * efficient to limit Read-DMA transactions to 2KB, rather than 4KB.
3215  *
3216  * If the driver can neither enable ECRC nor verify that it has
3217  * already been enabled, then it must use a firmware image which works
3218  * around unaligned completion packets (myri10ge_rss_ethp_z8e.dat), and it
3219  * should also ensure that it never gives the device a Read-DMA which is
3220  * larger than 2KB by setting the tx_boundary to 2KB.  If ECRC is
3221  * enabled, then the driver should use the aligned (myri10ge_rss_eth_z8e.dat)
3222  * firmware image, and set tx_boundary to 4KB.
3223  */
3224
3225 static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
3226 {
3227         struct pci_dev *pdev = mgp->pdev;
3228         struct device *dev = &pdev->dev;
3229         int status;
3230
3231         mgp->tx_boundary = 4096;
3232         /*
3233          * Verify the max read request size was set to 4KB
3234          * before trying the test with 4KB.
3235          */
3236         status = pcie_get_readrq(pdev);
3237         if (status < 0) {
3238                 dev_err(dev, "Couldn't read max read req size: %d\n", status);
3239                 goto abort;
3240         }
3241         if (status != 4096) {
3242                 dev_warn(dev, "Max Read Request size != 4096 (%d)\n", status);
3243                 mgp->tx_boundary = 2048;
3244         }
3245         /*
3246          * load the optimized firmware (which assumes aligned PCIe
3247          * completions) in order to see if it works on this host.
3248          */
3249         mgp->fw_name = myri10ge_fw_aligned;
3250         status = myri10ge_load_firmware(mgp, 1);
3251         if (status != 0) {
3252                 goto abort;
3253         }
3254
3255         /*
3256          * Enable ECRC if possible
3257          */
3258         myri10ge_enable_ecrc(mgp);
3259
3260         /*
3261          * Run a DMA test which watches for unaligned completions and
3262          * aborts on the first one seen.
3263          */
3264
3265         status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST);
3266         if (status == 0)
3267                 return;         /* keep the aligned firmware */
3268
3269         if (status != -E2BIG)
3270                 dev_warn(dev, "DMA test failed: %d\n", status);
3271         if (status == -ENOSYS)
3272                 dev_warn(dev, "Falling back to ethp! "
3273                          "Please install up to date fw\n");
3274 abort:
3275         /* fall back to using the unaligned firmware */
3276         mgp->tx_boundary = 2048;
3277         mgp->fw_name = myri10ge_fw_unaligned;
3278
3279 }
3280
3281 static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
3282 {
3283         int overridden = 0;
3284
3285         if (myri10ge_force_firmware == 0) {
3286                 int link_width, exp_cap;
3287                 u16 lnk;
3288
3289                 exp_cap = pci_find_capability(mgp->pdev, PCI_CAP_ID_EXP);
3290                 pci_read_config_word(mgp->pdev, exp_cap + PCI_EXP_LNKSTA, &lnk);
3291                 link_width = (lnk >> 4) & 0x3f;
3292
3293                 /* Check to see if Link is less than 8 or if the
3294                  * upstream bridge is known to provide aligned
3295                  * completions */
3296                 if (link_width < 8) {
3297                         dev_info(&mgp->pdev->dev, "PCIE x%d Link\n",
3298                                  link_width);
3299                         mgp->tx_boundary = 4096;
3300                         mgp->fw_name = myri10ge_fw_aligned;
3301                 } else {
3302                         myri10ge_firmware_probe(mgp);
3303                 }
3304         } else {
3305                 if (myri10ge_force_firmware == 1) {
3306                         dev_info(&mgp->pdev->dev,
3307                                  "Assuming aligned completions (forced)\n");
3308                         mgp->tx_boundary = 4096;
3309                         mgp->fw_name = myri10ge_fw_aligned;
3310                 } else {
3311                         dev_info(&mgp->pdev->dev,
3312                                  "Assuming unaligned completions (forced)\n");
3313                         mgp->tx_boundary = 2048;
3314                         mgp->fw_name = myri10ge_fw_unaligned;
3315                 }
3316         }
3317         if (myri10ge_fw_name != NULL) {
3318                 overridden = 1;
3319                 mgp->fw_name = myri10ge_fw_name;
3320         }
3321         if (mgp->board_number < MYRI10GE_MAX_BOARDS &&
3322             myri10ge_fw_names[mgp->board_number] != NULL &&
3323             strlen(myri10ge_fw_names[mgp->board_number])) {
3324                 mgp->fw_name = myri10ge_fw_names[mgp->board_number];
3325                 overridden = 1;
3326         }
3327         if (overridden)
3328                 dev_info(&mgp->pdev->dev, "overriding firmware to %s\n",
3329                          mgp->fw_name);
3330 }
3331
3332 #ifdef CONFIG_PM
3333 static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state)
3334 {
3335         struct myri10ge_priv *mgp;
3336         struct net_device *netdev;
3337
3338         mgp = pci_get_drvdata(pdev);
3339         if (mgp == NULL)
3340                 return -EINVAL;
3341         netdev = mgp->dev;
3342
3343         netif_device_detach(netdev);
3344         if (netif_running(netdev)) {
3345                 printk(KERN_INFO "myri10ge: closing %s\n", netdev->name);
3346                 rtnl_lock();
3347                 myri10ge_close(netdev);
3348                 rtnl_unlock();
3349         }
3350         myri10ge_dummy_rdma(mgp, 0);
3351         pci_save_state(pdev);
3352         pci_disable_device(pdev);
3353
3354         return pci_set_power_state(pdev, pci_choose_state(pdev, state));
3355 }
3356
3357 static int myri10ge_resume(struct pci_dev *pdev)
3358 {
3359         struct myri10ge_priv *mgp;
3360         struct net_device *netdev;
3361         int status;
3362         u16 vendor;
3363
3364         mgp = pci_get_drvdata(pdev);
3365         if (mgp == NULL)
3366                 return -EINVAL;
3367         netdev = mgp->dev;
3368         pci_set_power_state(pdev, 0);   /* zeros conf space as a side effect */
3369         msleep(5);              /* give card time to respond */
3370         pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3371         if (vendor == 0xffff) {
3372                 printk(KERN_ERR "myri10ge: %s: device disappeared!\n",
3373                        mgp->dev->name);
3374                 return -EIO;
3375         }
3376
3377         status = pci_restore_state(pdev);
3378         if (status)
3379                 return status;
3380
3381         status = pci_enable_device(pdev);
3382         if (status) {
3383                 dev_err(&pdev->dev, "failed to enable device\n");
3384                 return status;
3385         }
3386
3387         pci_set_master(pdev);
3388
3389         myri10ge_reset(mgp);
3390         myri10ge_dummy_rdma(mgp, 1);
3391
3392         /* Save configuration space to be restored if the
3393          * nic resets due to a parity error */
3394         pci_save_state(pdev);
3395
3396         if (netif_running(netdev)) {
3397                 rtnl_lock();
3398                 status = myri10ge_open(netdev);
3399                 rtnl_unlock();
3400                 if (status != 0)
3401                         goto abort_with_enabled;
3402
3403         }
3404         netif_device_attach(netdev);
3405
3406         return 0;
3407
3408 abort_with_enabled:
3409         pci_disable_device(pdev);
3410         return -EIO;
3411
3412 }
3413 #endif                          /* CONFIG_PM */
3414
3415 static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp)
3416 {
3417         struct pci_dev *pdev = mgp->pdev;
3418         int vs = mgp->vendor_specific_offset;
3419         u32 reboot;
3420
3421         /*enter read32 mode */
3422         pci_write_config_byte(pdev, vs + 0x10, 0x3);
3423
3424         /*read REBOOT_STATUS (0xfffffff0) */
3425         pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0);
3426         pci_read_config_dword(pdev, vs + 0x14, &reboot);
3427         return reboot;
3428 }
3429
3430 /*
3431  * This watchdog is used to check whether the board has suffered
3432  * from a parity error and needs to be recovered.
3433  */
3434 static void myri10ge_watchdog(struct work_struct *work)
3435 {
3436         struct myri10ge_priv *mgp =
3437             container_of(work, struct myri10ge_priv, watchdog_work);
3438         struct myri10ge_tx_buf *tx;
3439         u32 reboot;
3440         int status, rebooted;
3441         int i;
3442         u16 cmd, vendor;
3443
3444         mgp->watchdog_resets++;
3445         pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3446         rebooted = 0;
3447         if ((cmd & PCI_COMMAND_MASTER) == 0) {
3448                 /* Bus master DMA disabled?  Check to see
3449                  * if the card rebooted due to a parity error
3450                  * For now, just report it */
3451                 reboot = myri10ge_read_reboot(mgp);
3452                 printk(KERN_ERR
3453                        "myri10ge: %s: NIC rebooted (0x%x),%s resetting\n",
3454                        mgp->dev->name, reboot,
3455                        myri10ge_reset_recover ? " " : " not");
3456                 if (myri10ge_reset_recover == 0)
3457                         return;
3458                 rtnl_lock();
3459                 mgp->rebooted = 1;
3460                 rebooted = 1;
3461                 myri10ge_close(mgp->dev);
3462                 myri10ge_reset_recover--;
3463                 mgp->rebooted = 0;
3464                 /*
3465                  * A rebooted nic will come back with config space as
3466                  * it was after power was applied to PCIe bus.
3467                  * Attempt to restore config space which was saved
3468                  * when the driver was loaded, or the last time the
3469                  * nic was resumed from power saving mode.
3470                  */
3471                 pci_restore_state(mgp->pdev);
3472
3473                 /* save state again for accounting reasons */
3474                 pci_save_state(mgp->pdev);
3475
3476         } else {
3477                 /* if we get back -1's from our slot, perhaps somebody
3478                  * powered off our card.  Don't try to reset it in
3479                  * this case */
3480                 if (cmd == 0xffff) {
3481                         pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3482                         if (vendor == 0xffff) {
3483                                 printk(KERN_ERR
3484                                        "myri10ge: %s: device disappeared!\n",
3485                                        mgp->dev->name);
3486                                 return;
3487                         }
3488                 }
3489                 /* Perhaps it is a software error.  Try to reset */
3490
3491                 printk(KERN_ERR "myri10ge: %s: device timeout, resetting\n",
3492                        mgp->dev->name);
3493                 for (i = 0; i < mgp->num_slices; i++) {
3494                         tx = &mgp->ss[i].tx;
3495                         printk(KERN_INFO
3496                                "myri10ge: %s: (%d): %d %d %d %d %d %d\n",
3497                                mgp->dev->name, i, tx->queue_active, tx->req,
3498                                tx->done, tx->pkt_start, tx->pkt_done,
3499                                (int)ntohl(mgp->ss[i].fw_stats->
3500                                           send_done_count));
3501                         msleep(2000);
3502                         printk(KERN_INFO
3503                                "myri10ge: %s: (%d): %d %d %d %d %d %d\n",
3504                                mgp->dev->name, i, tx->queue_active, tx->req,
3505                                tx->done, tx->pkt_start, tx->pkt_done,
3506                                (int)ntohl(mgp->ss[i].fw_stats->
3507                                           send_done_count));
3508                 }
3509         }
3510
3511         if (!rebooted) {
3512                 rtnl_lock();
3513                 myri10ge_close(mgp->dev);
3514         }
3515         status = myri10ge_load_firmware(mgp, 1);
3516         if (status != 0)
3517                 printk(KERN_ERR "myri10ge: %s: failed to load firmware\n",
3518                        mgp->dev->name);
3519         else
3520                 myri10ge_open(mgp->dev);
3521         rtnl_unlock();
3522 }
3523
3524 /*
3525  * We use our own timer routine rather than relying upon
3526  * netdev->tx_timeout because we have a very large hardware transmit
3527  * queue.  Due to the large queue, the netdev->tx_timeout function
3528  * cannot detect a NIC with a parity error in a timely fashion if the
3529  * NIC is lightly loaded.
3530  */
3531 static void myri10ge_watchdog_timer(unsigned long arg)
3532 {
3533         struct myri10ge_priv *mgp;
3534         struct myri10ge_slice_state *ss;
3535         int i, reset_needed, busy_slice_cnt;
3536         u32 rx_pause_cnt;
3537         u16 cmd;
3538
3539         mgp = (struct myri10ge_priv *)arg;
3540
3541         rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3542         busy_slice_cnt = 0;
3543         for (i = 0, reset_needed = 0;
3544              i < mgp->num_slices && reset_needed == 0; ++i) {
3545
3546                 ss = &mgp->ss[i];
3547                 if (ss->rx_small.watchdog_needed) {
3548                         myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
3549                                                 mgp->small_bytes + MXGEFW_PAD,
3550                                                 1);
3551                         if (ss->rx_small.fill_cnt - ss->rx_small.cnt >=
3552                             myri10ge_fill_thresh)
3553                                 ss->rx_small.watchdog_needed = 0;
3554                 }
3555                 if (ss->rx_big.watchdog_needed) {
3556                         myri10ge_alloc_rx_pages(mgp, &ss->rx_big,
3557                                                 mgp->big_bytes, 1);
3558                         if (ss->rx_big.fill_cnt - ss->rx_big.cnt >=
3559                             myri10ge_fill_thresh)
3560                                 ss->rx_big.watchdog_needed = 0;
3561                 }
3562
3563                 if (ss->tx.req != ss->tx.done &&
3564                     ss->tx.done == ss->watchdog_tx_done &&
3565                     ss->watchdog_tx_req != ss->watchdog_tx_done) {
3566                         /* nic seems like it might be stuck.. */
3567                         if (rx_pause_cnt != mgp->watchdog_pause) {
3568                                 if (net_ratelimit())
3569                                         printk(KERN_WARNING
3570                                                "myri10ge %s slice %d:"
3571                                                "TX paused, check link partner\n",
3572                                                mgp->dev->name, i);
3573                         } else {
3574                                 printk(KERN_WARNING
3575                                        "myri10ge %s slice %d stuck:",
3576                                        mgp->dev->name, i);
3577                                 reset_needed = 1;
3578                         }
3579                 }
3580                 if (ss->watchdog_tx_done != ss->tx.done ||
3581                     ss->watchdog_rx_done != ss->rx_done.cnt) {
3582                         busy_slice_cnt++;
3583                 }
3584                 ss->watchdog_tx_done = ss->tx.done;
3585                 ss->watchdog_tx_req = ss->tx.req;
3586                 ss->watchdog_rx_done = ss->rx_done.cnt;
3587         }
3588         /* if we've sent or received no traffic, poll the NIC to
3589          * ensure it is still there.  Otherwise, we risk not noticing
3590          * an error in a timely fashion */
3591         if (busy_slice_cnt == 0) {
3592                 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3593                 if ((cmd & PCI_COMMAND_MASTER) == 0) {
3594                         reset_needed = 1;
3595                 }
3596         }
3597         mgp->watchdog_pause = rx_pause_cnt;
3598
3599         if (reset_needed) {
3600                 schedule_work(&mgp->watchdog_work);
3601         } else {
3602                 /* rearm timer */
3603                 mod_timer(&mgp->watchdog_timer,
3604                           jiffies + myri10ge_watchdog_timeout * HZ);
3605         }
3606 }
3607
3608 static void myri10ge_free_slices(struct myri10ge_priv *mgp)
3609 {
3610         struct myri10ge_slice_state *ss;
3611         struct pci_dev *pdev = mgp->pdev;
3612         size_t bytes;
3613         int i;
3614
3615         if (mgp->ss == NULL)
3616                 return;
3617
3618         for (i = 0; i < mgp->num_slices; i++) {
3619                 ss = &mgp->ss[i];
3620                 if (ss->rx_done.entry != NULL) {
3621                         bytes = mgp->max_intr_slots *
3622                             sizeof(*ss->rx_done.entry);
3623                         dma_free_coherent(&pdev->dev, bytes,
3624                                           ss->rx_done.entry, ss->rx_done.bus);
3625                         ss->rx_done.entry = NULL;
3626                 }
3627                 if (ss->fw_stats != NULL) {
3628                         bytes = sizeof(*ss->fw_stats);
3629                         dma_free_coherent(&pdev->dev, bytes,
3630                                           ss->fw_stats, ss->fw_stats_bus);
3631                         ss->fw_stats = NULL;
3632                 }
3633         }
3634         kfree(mgp->ss);
3635         mgp->ss = NULL;
3636 }
3637
3638 static int myri10ge_alloc_slices(struct myri10ge_priv *mgp)
3639 {
3640         struct myri10ge_slice_state *ss;
3641         struct pci_dev *pdev = mgp->pdev;
3642         size_t bytes;
3643         int i;
3644
3645         bytes = sizeof(*mgp->ss) * mgp->num_slices;
3646         mgp->ss = kzalloc(bytes, GFP_KERNEL);
3647         if (mgp->ss == NULL) {
3648                 return -ENOMEM;
3649         }
3650
3651         for (i = 0; i < mgp->num_slices; i++) {
3652                 ss = &mgp->ss[i];
3653                 bytes = mgp->max_intr_slots * sizeof(*ss->rx_done.entry);
3654                 ss->rx_done.entry = dma_alloc_coherent(&pdev->dev, bytes,
3655                                                        &ss->rx_done.bus,
3656                                                        GFP_KERNEL);
3657                 if (ss->rx_done.entry == NULL)
3658                         goto abort;
3659                 memset(ss->rx_done.entry, 0, bytes);
3660                 bytes = sizeof(*ss->fw_stats);
3661                 ss->fw_stats = dma_alloc_coherent(&pdev->dev, bytes,
3662                                                   &ss->fw_stats_bus,
3663                                                   GFP_KERNEL);
3664                 if (ss->fw_stats == NULL)
3665                         goto abort;
3666                 ss->mgp = mgp;
3667                 ss->dev = mgp->dev;
3668                 netif_napi_add(ss->dev, &ss->napi, myri10ge_poll,
3669                                myri10ge_napi_weight);
3670         }
3671         return 0;
3672 abort:
3673         myri10ge_free_slices(mgp);
3674         return -ENOMEM;
3675 }
3676
3677 /*
3678  * This function determines the number of slices supported.
3679  * The number slices is the minumum of the number of CPUS,
3680  * the number of MSI-X irqs supported, the number of slices
3681  * supported by the firmware
3682  */
3683 static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
3684 {
3685         struct myri10ge_cmd cmd;
3686         struct pci_dev *pdev = mgp->pdev;
3687         char *old_fw;
3688         int i, status, ncpus, msix_cap;
3689
3690         mgp->num_slices = 1;
3691         msix_cap = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3692         ncpus = num_online_cpus();
3693
3694         if (myri10ge_max_slices == 1 || msix_cap == 0 ||
3695             (myri10ge_max_slices == -1 && ncpus < 2))
3696                 return;
3697
3698         /* try to load the slice aware rss firmware */
3699         old_fw = mgp->fw_name;
3700         if (myri10ge_fw_name != NULL) {
3701                 dev_info(&mgp->pdev->dev, "overriding rss firmware to %s\n",
3702                          myri10ge_fw_name);
3703                 mgp->fw_name = myri10ge_fw_name;
3704         } else if (old_fw == myri10ge_fw_aligned)
3705                 mgp->fw_name = myri10ge_fw_rss_aligned;
3706         else
3707                 mgp->fw_name = myri10ge_fw_rss_unaligned;
3708         status = myri10ge_load_firmware(mgp, 0);
3709         if (status != 0) {
3710                 dev_info(&pdev->dev, "Rss firmware not found\n");
3711                 return;
3712         }
3713
3714         /* hit the board with a reset to ensure it is alive */
3715         memset(&cmd, 0, sizeof(cmd));
3716         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
3717         if (status != 0) {
3718                 dev_err(&mgp->pdev->dev, "failed reset\n");
3719                 goto abort_with_fw;
3720                 return;
3721         }
3722
3723         mgp->max_intr_slots = cmd.data0 / sizeof(struct mcp_slot);
3724
3725         /* tell it the size of the interrupt queues */
3726         cmd.data0 = mgp->max_intr_slots * sizeof(struct mcp_slot);
3727         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
3728         if (status != 0) {
3729                 dev_err(&mgp->pdev->dev, "failed MXGEFW_CMD_SET_INTRQ_SIZE\n");
3730                 goto abort_with_fw;
3731         }
3732
3733         /* ask the maximum number of slices it supports */
3734         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES, &cmd, 0);
3735         if (status != 0)
3736                 goto abort_with_fw;
3737         else
3738                 mgp->num_slices = cmd.data0;
3739
3740         /* Only allow multiple slices if MSI-X is usable */
3741         if (!myri10ge_msi) {
3742                 goto abort_with_fw;
3743         }
3744
3745         /* if the admin did not specify a limit to how many
3746          * slices we should use, cap it automatically to the
3747          * number of CPUs currently online */
3748         if (myri10ge_max_slices == -1)
3749                 myri10ge_max_slices = ncpus;
3750
3751         if (mgp->num_slices > myri10ge_max_slices)
3752                 mgp->num_slices = myri10ge_max_slices;
3753
3754         /* Now try to allocate as many MSI-X vectors as we have
3755          * slices. We give up on MSI-X if we can only get a single
3756          * vector. */
3757
3758         mgp->msix_vectors = kzalloc(mgp->num_slices *
3759                                     sizeof(*mgp->msix_vectors), GFP_KERNEL);
3760         if (mgp->msix_vectors == NULL)
3761                 goto disable_msix;
3762         for (i = 0; i < mgp->num_slices; i++) {
3763                 mgp->msix_vectors[i].entry = i;
3764         }
3765
3766         while (mgp->num_slices > 1) {
3767                 /* make sure it is a power of two */
3768                 while (!is_power_of_2(mgp->num_slices))
3769                         mgp->num_slices--;
3770                 if (mgp->num_slices == 1)
3771                         goto disable_msix;
3772                 status = pci_enable_msix(pdev, mgp->msix_vectors,
3773                                          mgp->num_slices);
3774                 if (status == 0) {
3775                         pci_disable_msix(pdev);
3776                         return;
3777                 }
3778                 if (status > 0)
3779                         mgp->num_slices = status;
3780                 else
3781                         goto disable_msix;
3782         }
3783
3784 disable_msix:
3785         if (mgp->msix_vectors != NULL) {
3786                 kfree(mgp->msix_vectors);
3787                 mgp->msix_vectors = NULL;
3788         }
3789
3790 abort_with_fw:
3791         mgp->num_slices = 1;
3792         mgp->fw_name = old_fw;
3793         myri10ge_load_firmware(mgp, 0);
3794 }
3795
3796 static const struct net_device_ops myri10ge_netdev_ops = {
3797         .ndo_open               = myri10ge_open,
3798         .ndo_stop               = myri10ge_close,
3799         .ndo_start_xmit         = myri10ge_xmit,
3800         .ndo_get_stats          = myri10ge_get_stats,
3801         .ndo_validate_addr      = eth_validate_addr,
3802         .ndo_change_mtu         = myri10ge_change_mtu,
3803         .ndo_set_multicast_list = myri10ge_set_multicast_list,
3804         .ndo_set_mac_address    = myri10ge_set_mac_address,
3805 };
3806
3807 static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3808 {
3809         struct net_device *netdev;
3810         struct myri10ge_priv *mgp;
3811         struct device *dev = &pdev->dev;
3812         int i;
3813         int status = -ENXIO;
3814         int dac_enabled;
3815         unsigned hdr_offset, ss_offset;
3816         static int board_number;
3817
3818         netdev = alloc_etherdev_mq(sizeof(*mgp), MYRI10GE_MAX_SLICES);
3819         if (netdev == NULL) {
3820                 dev_err(dev, "Could not allocate ethernet device\n");
3821                 return -ENOMEM;
3822         }
3823
3824         SET_NETDEV_DEV(netdev, &pdev->dev);
3825
3826         mgp = netdev_priv(netdev);
3827         mgp->dev = netdev;
3828         mgp->pdev = pdev;
3829         mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
3830         mgp->pause = myri10ge_flow_control;
3831         mgp->intr_coal_delay = myri10ge_intr_coal_delay;
3832         mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT);
3833         mgp->board_number = board_number;
3834         init_waitqueue_head(&mgp->down_wq);
3835
3836         if (pci_enable_device(pdev)) {
3837                 dev_err(&pdev->dev, "pci_enable_device call failed\n");
3838                 status = -ENODEV;
3839                 goto abort_with_netdev;
3840         }
3841
3842         /* Find the vendor-specific cap so we can check
3843          * the reboot register later on */
3844         mgp->vendor_specific_offset
3845             = pci_find_capability(pdev, PCI_CAP_ID_VNDR);
3846
3847         /* Set our max read request to 4KB */
3848         status = pcie_set_readrq(pdev, 4096);
3849         if (status != 0) {
3850                 dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n",
3851                         status);
3852                 goto abort_with_enabled;
3853         }
3854
3855         pci_set_master(pdev);
3856         dac_enabled = 1;
3857         status = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
3858         if (status != 0) {
3859                 dac_enabled = 0;
3860                 dev_err(&pdev->dev,
3861                         "64-bit pci address mask was refused, "
3862                         "trying 32-bit\n");
3863                 status = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3864         }
3865         if (status != 0) {
3866                 dev_err(&pdev->dev, "Error %d setting DMA mask\n", status);
3867                 goto abort_with_enabled;
3868         }
3869         (void)pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
3870         mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd),
3871                                       &mgp->cmd_bus, GFP_KERNEL);
3872         if (mgp->cmd == NULL)
3873                 goto abort_with_enabled;
3874
3875         mgp->board_span = pci_resource_len(pdev, 0);
3876         mgp->iomem_base = pci_resource_start(pdev, 0);
3877         mgp->mtrr = -1;
3878         mgp->wc_enabled = 0;
3879 #ifdef CONFIG_MTRR
3880         mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span,
3881                              MTRR_TYPE_WRCOMB, 1);
3882         if (mgp->mtrr >= 0)
3883                 mgp->wc_enabled = 1;
3884 #endif
3885         mgp->sram = ioremap_wc(mgp->iomem_base, mgp->board_span);
3886         if (mgp->sram == NULL) {
3887                 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n",
3888                         mgp->board_span, mgp->iomem_base);
3889                 status = -ENXIO;
3890                 goto abort_with_mtrr;
3891         }
3892         hdr_offset =
3893             ntohl(__raw_readl(mgp->sram + MCP_HEADER_PTR_OFFSET)) & 0xffffc;
3894         ss_offset = hdr_offset + offsetof(struct mcp_gen_header, string_specs);
3895         mgp->sram_size = ntohl(__raw_readl(mgp->sram + ss_offset));
3896         if (mgp->sram_size > mgp->board_span ||
3897             mgp->sram_size <= MYRI10GE_FW_OFFSET) {
3898                 dev_err(&pdev->dev,
3899                         "invalid sram_size %dB or board span %ldB\n",
3900                         mgp->sram_size, mgp->board_span);
3901                 goto abort_with_ioremap;
3902         }
3903         memcpy_fromio(mgp->eeprom_strings,
3904                       mgp->sram + mgp->sram_size, MYRI10GE_EEPROM_STRINGS_SIZE);
3905         memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2);
3906         status = myri10ge_read_mac_addr(mgp);
3907         if (status)
3908                 goto abort_with_ioremap;
3909
3910         for (i = 0; i < ETH_ALEN; i++)
3911                 netdev->dev_addr[i] = mgp->mac_addr[i];
3912
3913         myri10ge_select_firmware(mgp);
3914
3915         status = myri10ge_load_firmware(mgp, 1);
3916         if (status != 0) {
3917                 dev_err(&pdev->dev, "failed to load firmware\n");
3918                 goto abort_with_ioremap;
3919         }
3920         myri10ge_probe_slices(mgp);
3921         status = myri10ge_alloc_slices(mgp);
3922         if (status != 0) {
3923                 dev_err(&pdev->dev, "failed to alloc slice state\n");
3924                 goto abort_with_firmware;
3925         }
3926         netdev->real_num_tx_queues = mgp->num_slices;
3927         status = myri10ge_reset(mgp);
3928         if (status != 0) {
3929                 dev_err(&pdev->dev, "failed reset\n");
3930                 goto abort_with_slices;
3931         }
3932 #ifdef CONFIG_MYRI10GE_DCA
3933         myri10ge_setup_dca(mgp);
3934 #endif
3935         pci_set_drvdata(pdev, mgp);
3936         if ((myri10ge_initial_mtu + ETH_HLEN) > MYRI10GE_MAX_ETHER_MTU)
3937                 myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
3938         if ((myri10ge_initial_mtu + ETH_HLEN) < 68)
3939                 myri10ge_initial_mtu = 68;
3940
3941         netdev->netdev_ops = &myri10ge_netdev_ops;
3942         netdev->mtu = myri10ge_initial_mtu;
3943         netdev->base_addr = mgp->iomem_base;
3944         netdev->features = mgp->features;
3945
3946         if (dac_enabled)
3947                 netdev->features |= NETIF_F_HIGHDMA;
3948         netdev->features |= NETIF_F_LRO;
3949
3950         netdev->vlan_features |= mgp->features;
3951         if (mgp->fw_ver_tiny < 37)
3952                 netdev->vlan_features &= ~NETIF_F_TSO6;
3953         if (mgp->fw_ver_tiny < 32)
3954                 netdev->vlan_features &= ~NETIF_F_TSO;
3955
3956         /* make sure we can get an irq, and that MSI can be
3957          * setup (if available).  Also ensure netdev->irq
3958          * is set to correct value if MSI is enabled */
3959         status = myri10ge_request_irq(mgp);
3960         if (status != 0)
3961                 goto abort_with_firmware;
3962         netdev->irq = pdev->irq;
3963         myri10ge_free_irq(mgp);
3964
3965         /* Save configuration space to be restored if the
3966          * nic resets due to a parity error */
3967         pci_save_state(pdev);
3968
3969         /* Setup the watchdog timer */
3970         setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer,
3971                     (unsigned long)mgp);
3972
3973         spin_lock_init(&mgp->stats_lock);
3974         SET_ETHTOOL_OPS(netdev, &myri10ge_ethtool_ops);
3975         INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog);
3976         status = register_netdev(netdev);
3977         if (status != 0) {
3978                 dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
3979                 goto abort_with_state;
3980         }
3981         if (mgp->msix_enabled)
3982                 dev_info(dev, "%d MSI-X IRQs, tx bndry %d, fw %s, WC %s\n",
3983                          mgp->num_slices, mgp->tx_boundary, mgp->fw_name,
3984                          (mgp->wc_enabled ? "Enabled" : "Disabled"));
3985         else
3986                 dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, WC %s\n",
3987                          mgp->msi_enabled ? "MSI" : "xPIC",
3988                          netdev->irq, mgp->tx_boundary, mgp->fw_name,
3989                          (mgp->wc_enabled ? "Enabled" : "Disabled"));
3990
3991         board_number++;
3992         return 0;
3993
3994 abort_with_state:
3995         pci_restore_state(pdev);
3996
3997 abort_with_slices:
3998         myri10ge_free_slices(mgp);
3999
4000 abort_with_firmware:
4001         myri10ge_dummy_rdma(mgp, 0);
4002
4003 abort_with_ioremap:
4004         if (mgp->mac_addr_string != NULL)
4005                 dev_err(&pdev->dev,
4006                         "myri10ge_probe() failed: MAC=%s, SN=%ld\n",
4007                         mgp->mac_addr_string, mgp->serial_number);
4008         iounmap(mgp->sram);
4009
4010 abort_with_mtrr:
4011 #ifdef CONFIG_MTRR
4012         if (mgp->mtrr >= 0)
4013                 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
4014 #endif
4015         dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
4016                           mgp->cmd, mgp->cmd_bus);
4017
4018 abort_with_enabled:
4019         pci_disable_device(pdev);
4020
4021 abort_with_netdev:
4022         free_netdev(netdev);
4023         return status;
4024 }
4025
4026 /*
4027  * myri10ge_remove
4028  *
4029  * Does what is necessary to shutdown one Myrinet device. Called
4030  *   once for each Myrinet card by the kernel when a module is
4031  *   unloaded.
4032  */
4033 static void myri10ge_remove(struct pci_dev *pdev)
4034 {
4035         struct myri10ge_priv *mgp;
4036         struct net_device *netdev;
4037
4038         mgp = pci_get_drvdata(pdev);
4039         if (mgp == NULL)
4040                 return;
4041
4042         flush_scheduled_work();
4043         netdev = mgp->dev;
4044         unregister_netdev(netdev);
4045
4046 #ifdef CONFIG_MYRI10GE_DCA
4047         myri10ge_teardown_dca(mgp);
4048 #endif
4049         myri10ge_dummy_rdma(mgp, 0);
4050
4051         /* avoid a memory leak */
4052         pci_restore_state(pdev);
4053
4054         iounmap(mgp->sram);
4055
4056 #ifdef CONFIG_MTRR
4057         if (mgp->mtrr >= 0)
4058                 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
4059 #endif
4060         myri10ge_free_slices(mgp);
4061         if (mgp->msix_vectors != NULL)
4062                 kfree(mgp->msix_vectors);
4063         dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
4064                           mgp->cmd, mgp->cmd_bus);
4065
4066         free_netdev(netdev);
4067         pci_disable_device(pdev);
4068         pci_set_drvdata(pdev, NULL);
4069 }
4070
4071 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E      0x0008
4072 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9    0x0009
4073
4074 static struct pci_device_id myri10ge_pci_tbl[] = {
4075         {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)},
4076         {PCI_DEVICE
4077          (PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9)},
4078         {0},
4079 };
4080
4081 MODULE_DEVICE_TABLE(pci, myri10ge_pci_tbl);
4082
4083 static struct pci_driver myri10ge_driver = {
4084         .name = "myri10ge",
4085         .probe = myri10ge_probe,
4086         .remove = myri10ge_remove,
4087         .id_table = myri10ge_pci_tbl,
4088 #ifdef CONFIG_PM
4089         .suspend = myri10ge_suspend,
4090         .resume = myri10ge_resume,
4091 #endif
4092 };
4093
4094 #ifdef CONFIG_MYRI10GE_DCA
4095 static int
4096 myri10ge_notify_dca(struct notifier_block *nb, unsigned long event, void *p)
4097 {
4098         int err = driver_for_each_device(&myri10ge_driver.driver,
4099                                          NULL, &event,
4100                                          myri10ge_notify_dca_device);
4101
4102         if (err)
4103                 return NOTIFY_BAD;
4104         return NOTIFY_DONE;
4105 }
4106
4107 static struct notifier_block myri10ge_dca_notifier = {
4108         .notifier_call = myri10ge_notify_dca,
4109         .next = NULL,
4110         .priority = 0,
4111 };
4112 #endif                          /* CONFIG_MYRI10GE_DCA */
4113
4114 static __init int myri10ge_init_module(void)
4115 {
4116         printk(KERN_INFO "%s: Version %s\n", myri10ge_driver.name,
4117                MYRI10GE_VERSION_STR);
4118
4119         if (myri10ge_rss_hash > MXGEFW_RSS_HASH_TYPE_MAX) {
4120                 printk(KERN_ERR
4121                        "%s: Illegal rssh hash type %d, defaulting to source port\n",
4122                        myri10ge_driver.name, myri10ge_rss_hash);
4123                 myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT;
4124         }
4125 #ifdef CONFIG_MYRI10GE_DCA
4126         dca_register_notify(&myri10ge_dca_notifier);
4127 #endif
4128         if (myri10ge_max_slices > MYRI10GE_MAX_SLICES)
4129                 myri10ge_max_slices = MYRI10GE_MAX_SLICES;
4130
4131         return pci_register_driver(&myri10ge_driver);
4132 }
4133
4134 module_init(myri10ge_init_module);
4135
4136 static __exit void myri10ge_cleanup_module(void)
4137 {
4138 #ifdef CONFIG_MYRI10GE_DCA
4139         dca_unregister_notify(&myri10ge_dca_notifier);
4140 #endif
4141         pci_unregister_driver(&myri10ge_driver);
4142 }
4143
4144 module_exit(myri10ge_cleanup_module);