Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
42
43 #include <linux/tcp.h>
44 #include <linux/netdevice.h>
45 #include <linux/skbuff.h>
46 #include <linux/string.h>
47 #include <linux/module.h>
48 #include <linux/pci.h>
49 #include <linux/dma-mapping.h>
50 #include <linux/etherdevice.h>
51 #include <linux/if_ether.h>
52 #include <linux/if_vlan.h>
53 #include <linux/inet_lro.h>
54 #include <linux/dca.h>
55 #include <linux/ip.h>
56 #include <linux/inet.h>
57 #include <linux/in.h>
58 #include <linux/ethtool.h>
59 #include <linux/firmware.h>
60 #include <linux/delay.h>
61 #include <linux/timer.h>
62 #include <linux/vmalloc.h>
63 #include <linux/crc32.h>
64 #include <linux/moduleparam.h>
65 #include <linux/io.h>
66 #include <linux/log2.h>
67 #include <net/checksum.h>
68 #include <net/ip.h>
69 #include <net/tcp.h>
70 #include <asm/byteorder.h>
71 #include <asm/io.h>
72 #include <asm/processor.h>
73 #ifdef CONFIG_MTRR
74 #include <asm/mtrr.h>
75 #endif
76
77 #include "myri10ge_mcp.h"
78 #include "myri10ge_mcp_gen_header.h"
79
80 #define MYRI10GE_VERSION_STR "1.5.2-1.459"
81
82 MODULE_DESCRIPTION("Myricom 10G driver (10GbE)");
83 MODULE_AUTHOR("Maintainer: help@myri.com");
84 MODULE_VERSION(MYRI10GE_VERSION_STR);
85 MODULE_LICENSE("Dual BSD/GPL");
86
87 #define MYRI10GE_MAX_ETHER_MTU 9014
88
89 #define MYRI10GE_ETH_STOPPED 0
90 #define MYRI10GE_ETH_STOPPING 1
91 #define MYRI10GE_ETH_STARTING 2
92 #define MYRI10GE_ETH_RUNNING 3
93 #define MYRI10GE_ETH_OPEN_FAILED 4
94
95 #define MYRI10GE_EEPROM_STRINGS_SIZE 256
96 #define MYRI10GE_MAX_SEND_DESC_TSO ((65536 / 2048) * 2)
97 #define MYRI10GE_MAX_LRO_DESCRIPTORS 8
98 #define MYRI10GE_LRO_MAX_PKTS 64
99
100 #define MYRI10GE_NO_CONFIRM_DATA htonl(0xffffffff)
101 #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff
102
103 #define MYRI10GE_ALLOC_ORDER 0
104 #define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE)
105 #define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1)
106
107 #define MYRI10GE_MAX_SLICES 32
108
109 struct myri10ge_rx_buffer_state {
110         struct page *page;
111         int page_offset;
112          DECLARE_PCI_UNMAP_ADDR(bus)
113          DECLARE_PCI_UNMAP_LEN(len)
114 };
115
116 struct myri10ge_tx_buffer_state {
117         struct sk_buff *skb;
118         int last;
119          DECLARE_PCI_UNMAP_ADDR(bus)
120          DECLARE_PCI_UNMAP_LEN(len)
121 };
122
123 struct myri10ge_cmd {
124         u32 data0;
125         u32 data1;
126         u32 data2;
127 };
128
129 struct myri10ge_rx_buf {
130         struct mcp_kreq_ether_recv __iomem *lanai;      /* lanai ptr for recv ring */
131         struct mcp_kreq_ether_recv *shadow;     /* host shadow of recv ring */
132         struct myri10ge_rx_buffer_state *info;
133         struct page *page;
134         dma_addr_t bus;
135         int page_offset;
136         int cnt;
137         int fill_cnt;
138         int alloc_fail;
139         int mask;               /* number of rx slots -1 */
140         int watchdog_needed;
141 };
142
143 struct myri10ge_tx_buf {
144         struct mcp_kreq_ether_send __iomem *lanai;      /* lanai ptr for sendq */
145         __be32 __iomem *send_go;        /* "go" doorbell ptr */
146         __be32 __iomem *send_stop;      /* "stop" doorbell ptr */
147         struct mcp_kreq_ether_send *req_list;   /* host shadow of sendq */
148         char *req_bytes;
149         struct myri10ge_tx_buffer_state *info;
150         int mask;               /* number of transmit slots -1  */
151         int req ____cacheline_aligned;  /* transmit slots submitted     */
152         int pkt_start;          /* packets started */
153         int stop_queue;
154         int linearized;
155         int done ____cacheline_aligned; /* transmit slots completed     */
156         int pkt_done;           /* packets completed */
157         int wake_queue;
158         int queue_active;
159 };
160
161 struct myri10ge_rx_done {
162         struct mcp_slot *entry;
163         dma_addr_t bus;
164         int cnt;
165         int idx;
166         struct net_lro_mgr lro_mgr;
167         struct net_lro_desc lro_desc[MYRI10GE_MAX_LRO_DESCRIPTORS];
168 };
169
170 struct myri10ge_slice_netstats {
171         unsigned long rx_packets;
172         unsigned long tx_packets;
173         unsigned long rx_bytes;
174         unsigned long tx_bytes;
175         unsigned long rx_dropped;
176         unsigned long tx_dropped;
177 };
178
179 struct myri10ge_slice_state {
180         struct myri10ge_tx_buf tx;      /* transmit ring        */
181         struct myri10ge_rx_buf rx_small;
182         struct myri10ge_rx_buf rx_big;
183         struct myri10ge_rx_done rx_done;
184         struct net_device *dev;
185         struct napi_struct napi;
186         struct myri10ge_priv *mgp;
187         struct myri10ge_slice_netstats stats;
188         __be32 __iomem *irq_claim;
189         struct mcp_irq_data *fw_stats;
190         dma_addr_t fw_stats_bus;
191         int watchdog_tx_done;
192         int watchdog_tx_req;
193         int watchdog_rx_done;
194 #ifdef CONFIG_MYRI10GE_DCA
195         int cached_dca_tag;
196         int cpu;
197         __be32 __iomem *dca_tag;
198 #endif
199         char irq_desc[32];
200 };
201
202 struct myri10ge_priv {
203         struct myri10ge_slice_state *ss;
204         int tx_boundary;        /* boundary transmits cannot cross */
205         int num_slices;
206         int running;            /* running?             */
207         int csum_flag;          /* rx_csums?            */
208         int small_bytes;
209         int big_bytes;
210         int max_intr_slots;
211         struct net_device *dev;
212         spinlock_t stats_lock;
213         u8 __iomem *sram;
214         int sram_size;
215         unsigned long board_span;
216         unsigned long iomem_base;
217         __be32 __iomem *irq_deassert;
218         char *mac_addr_string;
219         struct mcp_cmd_response *cmd;
220         dma_addr_t cmd_bus;
221         struct pci_dev *pdev;
222         int msi_enabled;
223         int msix_enabled;
224         struct msix_entry *msix_vectors;
225 #ifdef CONFIG_MYRI10GE_DCA
226         int dca_enabled;
227 #endif
228         u32 link_state;
229         unsigned int rdma_tags_available;
230         int intr_coal_delay;
231         __be32 __iomem *intr_coal_delay_ptr;
232         int mtrr;
233         int wc_enabled;
234         int down_cnt;
235         wait_queue_head_t down_wq;
236         struct work_struct watchdog_work;
237         struct timer_list watchdog_timer;
238         int watchdog_resets;
239         int watchdog_pause;
240         int pause;
241         char *fw_name;
242         char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
243         char *product_code_string;
244         char fw_version[128];
245         int fw_ver_major;
246         int fw_ver_minor;
247         int fw_ver_tiny;
248         int adopted_rx_filter_bug;
249         u8 mac_addr[6];         /* eeprom mac address */
250         unsigned long serial_number;
251         int vendor_specific_offset;
252         int fw_multicast_support;
253         unsigned long features;
254         u32 max_tso6;
255         u32 read_dma;
256         u32 write_dma;
257         u32 read_write_dma;
258         u32 link_changes;
259         u32 msg_enable;
260         unsigned int board_number;
261         int rebooted;
262 };
263
264 static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
265 static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
266 static char *myri10ge_fw_rss_unaligned = "myri10ge_rss_ethp_z8e.dat";
267 static char *myri10ge_fw_rss_aligned = "myri10ge_rss_eth_z8e.dat";
268 MODULE_FIRMWARE("myri10ge_ethp_z8e.dat");
269 MODULE_FIRMWARE("myri10ge_eth_z8e.dat");
270 MODULE_FIRMWARE("myri10ge_rss_ethp_z8e.dat");
271 MODULE_FIRMWARE("myri10ge_rss_eth_z8e.dat");
272
273 static char *myri10ge_fw_name = NULL;
274 module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR);
275 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name");
276
277 #define MYRI10GE_MAX_BOARDS 8
278 static char *myri10ge_fw_names[MYRI10GE_MAX_BOARDS] =
279     {[0 ... (MYRI10GE_MAX_BOARDS - 1)] = NULL };
280 module_param_array_named(myri10ge_fw_names, myri10ge_fw_names, charp, NULL,
281                          0444);
282 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image names per board");
283
284 static int myri10ge_ecrc_enable = 1;
285 module_param(myri10ge_ecrc_enable, int, S_IRUGO);
286 MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E");
287
288 static int myri10ge_small_bytes = -1;   /* -1 == auto */
289 module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR);
290 MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets");
291
292 static int myri10ge_msi = 1;    /* enable msi by default */
293 module_param(myri10ge_msi, int, S_IRUGO | S_IWUSR);
294 MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts");
295
296 static int myri10ge_intr_coal_delay = 75;
297 module_param(myri10ge_intr_coal_delay, int, S_IRUGO);
298 MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay");
299
300 static int myri10ge_flow_control = 1;
301 module_param(myri10ge_flow_control, int, S_IRUGO);
302 MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter");
303
304 static int myri10ge_deassert_wait = 1;
305 module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR);
306 MODULE_PARM_DESC(myri10ge_deassert_wait,
307                  "Wait when deasserting legacy interrupts");
308
309 static int myri10ge_force_firmware = 0;
310 module_param(myri10ge_force_firmware, int, S_IRUGO);
311 MODULE_PARM_DESC(myri10ge_force_firmware,
312                  "Force firmware to assume aligned completions");
313
314 static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
315 module_param(myri10ge_initial_mtu, int, S_IRUGO);
316 MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU");
317
318 static int myri10ge_napi_weight = 64;
319 module_param(myri10ge_napi_weight, int, S_IRUGO);
320 MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight");
321
322 static int myri10ge_watchdog_timeout = 1;
323 module_param(myri10ge_watchdog_timeout, int, S_IRUGO);
324 MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout");
325
326 static int myri10ge_max_irq_loops = 1048576;
327 module_param(myri10ge_max_irq_loops, int, S_IRUGO);
328 MODULE_PARM_DESC(myri10ge_max_irq_loops,
329                  "Set stuck legacy IRQ detection threshold");
330
331 #define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK
332
333 static int myri10ge_debug = -1; /* defaults above */
334 module_param(myri10ge_debug, int, 0);
335 MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)");
336
337 static int myri10ge_lro_max_pkts = MYRI10GE_LRO_MAX_PKTS;
338 module_param(myri10ge_lro_max_pkts, int, S_IRUGO);
339 MODULE_PARM_DESC(myri10ge_lro_max_pkts,
340                  "Number of LRO packets to be aggregated");
341
342 static int myri10ge_fill_thresh = 256;
343 module_param(myri10ge_fill_thresh, int, S_IRUGO | S_IWUSR);
344 MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed");
345
346 static int myri10ge_reset_recover = 1;
347
348 static int myri10ge_max_slices = 1;
349 module_param(myri10ge_max_slices, int, S_IRUGO);
350 MODULE_PARM_DESC(myri10ge_max_slices, "Max tx/rx queues");
351
352 static int myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_DST_PORT;
353 module_param(myri10ge_rss_hash, int, S_IRUGO);
354 MODULE_PARM_DESC(myri10ge_rss_hash, "Type of RSS hashing to do");
355
356 static int myri10ge_dca = 1;
357 module_param(myri10ge_dca, int, S_IRUGO);
358 MODULE_PARM_DESC(myri10ge_dca, "Enable DCA if possible");
359
360 #define MYRI10GE_FW_OFFSET 1024*1024
361 #define MYRI10GE_HIGHPART_TO_U32(X) \
362 (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0)
363 #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X))
364
365 #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8)
366
367 static void myri10ge_set_multicast_list(struct net_device *dev);
368 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
369                                          struct net_device *dev);
370
371 static inline void put_be32(__be32 val, __be32 __iomem * p)
372 {
373         __raw_writel((__force __u32) val, (__force void __iomem *)p);
374 }
375
376 static struct net_device_stats *myri10ge_get_stats(struct net_device *dev);
377
378 static int
379 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
380                   struct myri10ge_cmd *data, int atomic)
381 {
382         struct mcp_cmd *buf;
383         char buf_bytes[sizeof(*buf) + 8];
384         struct mcp_cmd_response *response = mgp->cmd;
385         char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD;
386         u32 dma_low, dma_high, result, value;
387         int sleep_total = 0;
388
389         /* ensure buf is aligned to 8 bytes */
390         buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8);
391
392         buf->data0 = htonl(data->data0);
393         buf->data1 = htonl(data->data1);
394         buf->data2 = htonl(data->data2);
395         buf->cmd = htonl(cmd);
396         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
397         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
398
399         buf->response_addr.low = htonl(dma_low);
400         buf->response_addr.high = htonl(dma_high);
401         response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT);
402         mb();
403         myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf));
404
405         /* wait up to 15ms. Longest command is the DMA benchmark,
406          * which is capped at 5ms, but runs from a timeout handler
407          * that runs every 7.8ms. So a 15ms timeout leaves us with
408          * a 2.2ms margin
409          */
410         if (atomic) {
411                 /* if atomic is set, do not sleep,
412                  * and try to get the completion quickly
413                  * (1ms will be enough for those commands) */
414                 for (sleep_total = 0;
415                      sleep_total < 1000 &&
416                      response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
417                      sleep_total += 10) {
418                         udelay(10);
419                         mb();
420                 }
421         } else {
422                 /* use msleep for most command */
423                 for (sleep_total = 0;
424                      sleep_total < 15 &&
425                      response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
426                      sleep_total++)
427                         msleep(1);
428         }
429
430         result = ntohl(response->result);
431         value = ntohl(response->data);
432         if (result != MYRI10GE_NO_RESPONSE_RESULT) {
433                 if (result == 0) {
434                         data->data0 = value;
435                         return 0;
436                 } else if (result == MXGEFW_CMD_UNKNOWN) {
437                         return -ENOSYS;
438                 } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) {
439                         return -E2BIG;
440                 } else if (result == MXGEFW_CMD_ERROR_RANGE &&
441                            cmd == MXGEFW_CMD_ENABLE_RSS_QUEUES &&
442                            (data->
443                             data1 & MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES) !=
444                            0) {
445                         return -ERANGE;
446                 } else {
447                         dev_err(&mgp->pdev->dev,
448                                 "command %d failed, result = %d\n",
449                                 cmd, result);
450                         return -ENXIO;
451                 }
452         }
453
454         dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
455                 cmd, result);
456         return -EAGAIN;
457 }
458
459 /*
460  * The eeprom strings on the lanaiX have the format
461  * SN=x\0
462  * MAC=x:x:x:x:x:x\0
463  * PT:ddd mmm xx xx:xx:xx xx\0
464  * PV:ddd mmm xx xx:xx:xx xx\0
465  */
466 static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp)
467 {
468         char *ptr, *limit;
469         int i;
470
471         ptr = mgp->eeprom_strings;
472         limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE;
473
474         while (*ptr != '\0' && ptr < limit) {
475                 if (memcmp(ptr, "MAC=", 4) == 0) {
476                         ptr += 4;
477                         mgp->mac_addr_string = ptr;
478                         for (i = 0; i < 6; i++) {
479                                 if ((ptr + 2) > limit)
480                                         goto abort;
481                                 mgp->mac_addr[i] =
482                                     simple_strtoul(ptr, &ptr, 16);
483                                 ptr += 1;
484                         }
485                 }
486                 if (memcmp(ptr, "PC=", 3) == 0) {
487                         ptr += 3;
488                         mgp->product_code_string = ptr;
489                 }
490                 if (memcmp((const void *)ptr, "SN=", 3) == 0) {
491                         ptr += 3;
492                         mgp->serial_number = simple_strtoul(ptr, &ptr, 10);
493                 }
494                 while (ptr < limit && *ptr++) ;
495         }
496
497         return 0;
498
499 abort:
500         dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n");
501         return -ENXIO;
502 }
503
504 /*
505  * Enable or disable periodic RDMAs from the host to make certain
506  * chipsets resend dropped PCIe messages
507  */
508
509 static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable)
510 {
511         char __iomem *submit;
512         __be32 buf[16] __attribute__ ((__aligned__(8)));
513         u32 dma_low, dma_high;
514         int i;
515
516         /* clear confirmation addr */
517         mgp->cmd->data = 0;
518         mb();
519
520         /* send a rdma command to the PCIe engine, and wait for the
521          * response in the confirmation address.  The firmware should
522          * write a -1 there to indicate it is alive and well
523          */
524         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
525         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
526
527         buf[0] = htonl(dma_high);       /* confirm addr MSW */
528         buf[1] = htonl(dma_low);        /* confirm addr LSW */
529         buf[2] = MYRI10GE_NO_CONFIRM_DATA;      /* confirm data */
530         buf[3] = htonl(dma_high);       /* dummy addr MSW */
531         buf[4] = htonl(dma_low);        /* dummy addr LSW */
532         buf[5] = htonl(enable); /* enable? */
533
534         submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA;
535
536         myri10ge_pio_copy(submit, &buf, sizeof(buf));
537         for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++)
538                 msleep(1);
539         if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA)
540                 dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n",
541                         (enable ? "enable" : "disable"));
542 }
543
544 static int
545 myri10ge_validate_firmware(struct myri10ge_priv *mgp,
546                            struct mcp_gen_header *hdr)
547 {
548         struct device *dev = &mgp->pdev->dev;
549
550         /* check firmware type */
551         if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) {
552                 dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type));
553                 return -EINVAL;
554         }
555
556         /* save firmware version for ethtool */
557         strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
558
559         sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major,
560                &mgp->fw_ver_minor, &mgp->fw_ver_tiny);
561
562         if (!(mgp->fw_ver_major == MXGEFW_VERSION_MAJOR &&
563               mgp->fw_ver_minor == MXGEFW_VERSION_MINOR)) {
564                 dev_err(dev, "Found firmware version %s\n", mgp->fw_version);
565                 dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR,
566                         MXGEFW_VERSION_MINOR);
567                 return -EINVAL;
568         }
569         return 0;
570 }
571
572 static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
573 {
574         unsigned crc, reread_crc;
575         const struct firmware *fw;
576         struct device *dev = &mgp->pdev->dev;
577         unsigned char *fw_readback;
578         struct mcp_gen_header *hdr;
579         size_t hdr_offset;
580         int status;
581         unsigned i;
582
583         if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) {
584                 dev_err(dev, "Unable to load %s firmware image via hotplug\n",
585                         mgp->fw_name);
586                 status = -EINVAL;
587                 goto abort_with_nothing;
588         }
589
590         /* check size */
591
592         if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET ||
593             fw->size < MCP_HEADER_PTR_OFFSET + 4) {
594                 dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size);
595                 status = -EINVAL;
596                 goto abort_with_fw;
597         }
598
599         /* check id */
600         hdr_offset = ntohl(*(__be32 *) (fw->data + MCP_HEADER_PTR_OFFSET));
601         if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) {
602                 dev_err(dev, "Bad firmware file\n");
603                 status = -EINVAL;
604                 goto abort_with_fw;
605         }
606         hdr = (void *)(fw->data + hdr_offset);
607
608         status = myri10ge_validate_firmware(mgp, hdr);
609         if (status != 0)
610                 goto abort_with_fw;
611
612         crc = crc32(~0, fw->data, fw->size);
613         for (i = 0; i < fw->size; i += 256) {
614                 myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i,
615                                   fw->data + i,
616                                   min(256U, (unsigned)(fw->size - i)));
617                 mb();
618                 readb(mgp->sram);
619         }
620         fw_readback = vmalloc(fw->size);
621         if (!fw_readback) {
622                 status = -ENOMEM;
623                 goto abort_with_fw;
624         }
625         /* corruption checking is good for parity recovery and buggy chipset */
626         memcpy_fromio(fw_readback, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);
627         reread_crc = crc32(~0, fw_readback, fw->size);
628         vfree(fw_readback);
629         if (crc != reread_crc) {
630                 dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n",
631                         (unsigned)fw->size, reread_crc, crc);
632                 status = -EIO;
633                 goto abort_with_fw;
634         }
635         *size = (u32) fw->size;
636
637 abort_with_fw:
638         release_firmware(fw);
639
640 abort_with_nothing:
641         return status;
642 }
643
644 static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp)
645 {
646         struct mcp_gen_header *hdr;
647         struct device *dev = &mgp->pdev->dev;
648         const size_t bytes = sizeof(struct mcp_gen_header);
649         size_t hdr_offset;
650         int status;
651
652         /* find running firmware header */
653         hdr_offset = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
654
655         if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) {
656                 dev_err(dev, "Running firmware has bad header offset (%d)\n",
657                         (int)hdr_offset);
658                 return -EIO;
659         }
660
661         /* copy header of running firmware from SRAM to host memory to
662          * validate firmware */
663         hdr = kmalloc(bytes, GFP_KERNEL);
664         if (hdr == NULL) {
665                 dev_err(dev, "could not malloc firmware hdr\n");
666                 return -ENOMEM;
667         }
668         memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes);
669         status = myri10ge_validate_firmware(mgp, hdr);
670         kfree(hdr);
671
672         /* check to see if adopted firmware has bug where adopting
673          * it will cause broadcasts to be filtered unless the NIC
674          * is kept in ALLMULTI mode */
675         if (mgp->fw_ver_major == 1 && mgp->fw_ver_minor == 4 &&
676             mgp->fw_ver_tiny >= 4 && mgp->fw_ver_tiny <= 11) {
677                 mgp->adopted_rx_filter_bug = 1;
678                 dev_warn(dev, "Adopting fw %d.%d.%d: "
679                          "working around rx filter bug\n",
680                          mgp->fw_ver_major, mgp->fw_ver_minor,
681                          mgp->fw_ver_tiny);
682         }
683         return status;
684 }
685
686 static int myri10ge_get_firmware_capabilities(struct myri10ge_priv *mgp)
687 {
688         struct myri10ge_cmd cmd;
689         int status;
690
691         /* probe for IPv6 TSO support */
692         mgp->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
693         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_TSO6_HDR_SIZE,
694                                    &cmd, 0);
695         if (status == 0) {
696                 mgp->max_tso6 = cmd.data0;
697                 mgp->features |= NETIF_F_TSO6;
698         }
699
700         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
701         if (status != 0) {
702                 dev_err(&mgp->pdev->dev,
703                         "failed MXGEFW_CMD_GET_RX_RING_SIZE\n");
704                 return -ENXIO;
705         }
706
707         mgp->max_intr_slots = 2 * (cmd.data0 / sizeof(struct mcp_dma_addr));
708
709         return 0;
710 }
711
712 static int myri10ge_load_firmware(struct myri10ge_priv *mgp, int adopt)
713 {
714         char __iomem *submit;
715         __be32 buf[16] __attribute__ ((__aligned__(8)));
716         u32 dma_low, dma_high, size;
717         int status, i;
718
719         size = 0;
720         status = myri10ge_load_hotplug_firmware(mgp, &size);
721         if (status) {
722                 if (!adopt)
723                         return status;
724                 dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n");
725
726                 /* Do not attempt to adopt firmware if there
727                  * was a bad crc */
728                 if (status == -EIO)
729                         return status;
730
731                 status = myri10ge_adopt_running_firmware(mgp);
732                 if (status != 0) {
733                         dev_err(&mgp->pdev->dev,
734                                 "failed to adopt running firmware\n");
735                         return status;
736                 }
737                 dev_info(&mgp->pdev->dev,
738                          "Successfully adopted running firmware\n");
739                 if (mgp->tx_boundary == 4096) {
740                         dev_warn(&mgp->pdev->dev,
741                                  "Using firmware currently running on NIC"
742                                  ".  For optimal\n");
743                         dev_warn(&mgp->pdev->dev,
744                                  "performance consider loading optimized "
745                                  "firmware\n");
746                         dev_warn(&mgp->pdev->dev, "via hotplug\n");
747                 }
748
749                 mgp->fw_name = "adopted";
750                 mgp->tx_boundary = 2048;
751                 myri10ge_dummy_rdma(mgp, 1);
752                 status = myri10ge_get_firmware_capabilities(mgp);
753                 return status;
754         }
755
756         /* clear confirmation addr */
757         mgp->cmd->data = 0;
758         mb();
759
760         /* send a reload command to the bootstrap MCP, and wait for the
761          *  response in the confirmation address.  The firmware should
762          * write a -1 there to indicate it is alive and well
763          */
764         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
765         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
766
767         buf[0] = htonl(dma_high);       /* confirm addr MSW */
768         buf[1] = htonl(dma_low);        /* confirm addr LSW */
769         buf[2] = MYRI10GE_NO_CONFIRM_DATA;      /* confirm data */
770
771         /* FIX: All newest firmware should un-protect the bottom of
772          * the sram before handoff. However, the very first interfaces
773          * do not. Therefore the handoff copy must skip the first 8 bytes
774          */
775         buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */
776         buf[4] = htonl(size - 8);       /* length of code */
777         buf[5] = htonl(8);      /* where to copy to */
778         buf[6] = htonl(0);      /* where to jump to */
779
780         submit = mgp->sram + MXGEFW_BOOT_HANDOFF;
781
782         myri10ge_pio_copy(submit, &buf, sizeof(buf));
783         mb();
784         msleep(1);
785         mb();
786         i = 0;
787         while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 9) {
788                 msleep(1 << i);
789                 i++;
790         }
791         if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) {
792                 dev_err(&mgp->pdev->dev, "handoff failed\n");
793                 return -ENXIO;
794         }
795         myri10ge_dummy_rdma(mgp, 1);
796         status = myri10ge_get_firmware_capabilities(mgp);
797
798         return status;
799 }
800
801 static int myri10ge_update_mac_address(struct myri10ge_priv *mgp, u8 * addr)
802 {
803         struct myri10ge_cmd cmd;
804         int status;
805
806         cmd.data0 = ((addr[0] << 24) | (addr[1] << 16)
807                      | (addr[2] << 8) | addr[3]);
808
809         cmd.data1 = ((addr[4] << 8) | (addr[5]));
810
811         status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0);
812         return status;
813 }
814
815 static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause)
816 {
817         struct myri10ge_cmd cmd;
818         int status, ctl;
819
820         ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL;
821         status = myri10ge_send_cmd(mgp, ctl, &cmd, 0);
822
823         if (status) {
824                 netdev_err(mgp->dev, "Failed to set flow control mode\n");
825                 return status;
826         }
827         mgp->pause = pause;
828         return 0;
829 }
830
831 static void
832 myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic)
833 {
834         struct myri10ge_cmd cmd;
835         int status, ctl;
836
837         ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC;
838         status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic);
839         if (status)
840                 netdev_err(mgp->dev, "Failed to set promisc mode\n");
841 }
842
843 static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type)
844 {
845         struct myri10ge_cmd cmd;
846         int status;
847         u32 len;
848         struct page *dmatest_page;
849         dma_addr_t dmatest_bus;
850         char *test = " ";
851
852         dmatest_page = alloc_page(GFP_KERNEL);
853         if (!dmatest_page)
854                 return -ENOMEM;
855         dmatest_bus = pci_map_page(mgp->pdev, dmatest_page, 0, PAGE_SIZE,
856                                    DMA_BIDIRECTIONAL);
857
858         /* Run a small DMA test.
859          * The magic multipliers to the length tell the firmware
860          * to do DMA read, write, or read+write tests.  The
861          * results are returned in cmd.data0.  The upper 16
862          * bits or the return is the number of transfers completed.
863          * The lower 16 bits is the time in 0.5us ticks that the
864          * transfers took to complete.
865          */
866
867         len = mgp->tx_boundary;
868
869         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
870         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
871         cmd.data2 = len * 0x10000;
872         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
873         if (status != 0) {
874                 test = "read";
875                 goto abort;
876         }
877         mgp->read_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
878         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
879         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
880         cmd.data2 = len * 0x1;
881         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
882         if (status != 0) {
883                 test = "write";
884                 goto abort;
885         }
886         mgp->write_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
887
888         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
889         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
890         cmd.data2 = len * 0x10001;
891         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
892         if (status != 0) {
893                 test = "read/write";
894                 goto abort;
895         }
896         mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) /
897             (cmd.data0 & 0xffff);
898
899 abort:
900         pci_unmap_page(mgp->pdev, dmatest_bus, PAGE_SIZE, DMA_BIDIRECTIONAL);
901         put_page(dmatest_page);
902
903         if (status != 0 && test_type != MXGEFW_CMD_UNALIGNED_TEST)
904                 dev_warn(&mgp->pdev->dev, "DMA %s benchmark failed: %d\n",
905                          test, status);
906
907         return status;
908 }
909
910 static int myri10ge_reset(struct myri10ge_priv *mgp)
911 {
912         struct myri10ge_cmd cmd;
913         struct myri10ge_slice_state *ss;
914         int i, status;
915         size_t bytes;
916 #ifdef CONFIG_MYRI10GE_DCA
917         unsigned long dca_tag_off;
918 #endif
919
920         /* try to send a reset command to the card to see if it
921          * is alive */
922         memset(&cmd, 0, sizeof(cmd));
923         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
924         if (status != 0) {
925                 dev_err(&mgp->pdev->dev, "failed reset\n");
926                 return -ENXIO;
927         }
928
929         (void)myri10ge_dma_test(mgp, MXGEFW_DMA_TEST);
930         /*
931          * Use non-ndis mcp_slot (eg, 4 bytes total,
932          * no toeplitz hash value returned.  Older firmware will
933          * not understand this command, but will use the correct
934          * sized mcp_slot, so we ignore error returns
935          */
936         cmd.data0 = MXGEFW_RSS_MCP_SLOT_TYPE_MIN;
937         (void)myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_MCP_SLOT_TYPE, &cmd, 0);
938
939         /* Now exchange information about interrupts  */
940
941         bytes = mgp->max_intr_slots * sizeof(*mgp->ss[0].rx_done.entry);
942         cmd.data0 = (u32) bytes;
943         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
944
945         /*
946          * Even though we already know how many slices are supported
947          * via myri10ge_probe_slices() MXGEFW_CMD_GET_MAX_RSS_QUEUES
948          * has magic side effects, and must be called after a reset.
949          * It must be called prior to calling any RSS related cmds,
950          * including assigning an interrupt queue for anything but
951          * slice 0.  It must also be called *after*
952          * MXGEFW_CMD_SET_INTRQ_SIZE, since the intrq size is used by
953          * the firmware to compute offsets.
954          */
955
956         if (mgp->num_slices > 1) {
957
958                 /* ask the maximum number of slices it supports */
959                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES,
960                                            &cmd, 0);
961                 if (status != 0) {
962                         dev_err(&mgp->pdev->dev,
963                                 "failed to get number of slices\n");
964                 }
965
966                 /*
967                  * MXGEFW_CMD_ENABLE_RSS_QUEUES must be called prior
968                  * to setting up the interrupt queue DMA
969                  */
970
971                 cmd.data0 = mgp->num_slices;
972                 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
973                 if (mgp->dev->real_num_tx_queues > 1)
974                         cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
975                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
976                                            &cmd, 0);
977
978                 /* Firmware older than 1.4.32 only supports multiple
979                  * RX queues, so if we get an error, first retry using a
980                  * single TX queue before giving up */
981                 if (status != 0 && mgp->dev->real_num_tx_queues > 1) {
982                         mgp->dev->real_num_tx_queues = 1;
983                         cmd.data0 = mgp->num_slices;
984                         cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
985                         status = myri10ge_send_cmd(mgp,
986                                                    MXGEFW_CMD_ENABLE_RSS_QUEUES,
987                                                    &cmd, 0);
988                 }
989
990                 if (status != 0) {
991                         dev_err(&mgp->pdev->dev,
992                                 "failed to set number of slices\n");
993
994                         return status;
995                 }
996         }
997         for (i = 0; i < mgp->num_slices; i++) {
998                 ss = &mgp->ss[i];
999                 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->rx_done.bus);
1000                 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->rx_done.bus);
1001                 cmd.data2 = i;
1002                 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA,
1003                                             &cmd, 0);
1004         };
1005
1006         status |=
1007             myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0);
1008         for (i = 0; i < mgp->num_slices; i++) {
1009                 ss = &mgp->ss[i];
1010                 ss->irq_claim =
1011                     (__iomem __be32 *) (mgp->sram + cmd.data0 + 8 * i);
1012         }
1013         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET,
1014                                     &cmd, 0);
1015         mgp->irq_deassert = (__iomem __be32 *) (mgp->sram + cmd.data0);
1016
1017         status |= myri10ge_send_cmd
1018             (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0);
1019         mgp->intr_coal_delay_ptr = (__iomem __be32 *) (mgp->sram + cmd.data0);
1020         if (status != 0) {
1021                 dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n");
1022                 return status;
1023         }
1024         put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1025
1026 #ifdef CONFIG_MYRI10GE_DCA
1027         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_DCA_OFFSET, &cmd, 0);
1028         dca_tag_off = cmd.data0;
1029         for (i = 0; i < mgp->num_slices; i++) {
1030                 ss = &mgp->ss[i];
1031                 if (status == 0) {
1032                         ss->dca_tag = (__iomem __be32 *)
1033                             (mgp->sram + dca_tag_off + 4 * i);
1034                 } else {
1035                         ss->dca_tag = NULL;
1036                 }
1037         }
1038 #endif                          /* CONFIG_MYRI10GE_DCA */
1039
1040         /* reset mcp/driver shared state back to 0 */
1041
1042         mgp->link_changes = 0;
1043         for (i = 0; i < mgp->num_slices; i++) {
1044                 ss = &mgp->ss[i];
1045
1046                 memset(ss->rx_done.entry, 0, bytes);
1047                 ss->tx.req = 0;
1048                 ss->tx.done = 0;
1049                 ss->tx.pkt_start = 0;
1050                 ss->tx.pkt_done = 0;
1051                 ss->rx_big.cnt = 0;
1052                 ss->rx_small.cnt = 0;
1053                 ss->rx_done.idx = 0;
1054                 ss->rx_done.cnt = 0;
1055                 ss->tx.wake_queue = 0;
1056                 ss->tx.stop_queue = 0;
1057         }
1058
1059         status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr);
1060         myri10ge_change_pause(mgp, mgp->pause);
1061         myri10ge_set_multicast_list(mgp->dev);
1062         return status;
1063 }
1064
1065 #ifdef CONFIG_MYRI10GE_DCA
1066 static void
1067 myri10ge_write_dca(struct myri10ge_slice_state *ss, int cpu, int tag)
1068 {
1069         ss->cpu = cpu;
1070         ss->cached_dca_tag = tag;
1071         put_be32(htonl(tag), ss->dca_tag);
1072 }
1073
1074 static inline void myri10ge_update_dca(struct myri10ge_slice_state *ss)
1075 {
1076         int cpu = get_cpu();
1077         int tag;
1078
1079         if (cpu != ss->cpu) {
1080                 tag = dca_get_tag(cpu);
1081                 if (ss->cached_dca_tag != tag)
1082                         myri10ge_write_dca(ss, cpu, tag);
1083         }
1084         put_cpu();
1085 }
1086
1087 static void myri10ge_setup_dca(struct myri10ge_priv *mgp)
1088 {
1089         int err, i;
1090         struct pci_dev *pdev = mgp->pdev;
1091
1092         if (mgp->ss[0].dca_tag == NULL || mgp->dca_enabled)
1093                 return;
1094         if (!myri10ge_dca) {
1095                 dev_err(&pdev->dev, "dca disabled by administrator\n");
1096                 return;
1097         }
1098         err = dca_add_requester(&pdev->dev);
1099         if (err) {
1100                 if (err != -ENODEV)
1101                         dev_err(&pdev->dev,
1102                                 "dca_add_requester() failed, err=%d\n", err);
1103                 return;
1104         }
1105         mgp->dca_enabled = 1;
1106         for (i = 0; i < mgp->num_slices; i++)
1107                 myri10ge_write_dca(&mgp->ss[i], -1, 0);
1108 }
1109
1110 static void myri10ge_teardown_dca(struct myri10ge_priv *mgp)
1111 {
1112         struct pci_dev *pdev = mgp->pdev;
1113         int err;
1114
1115         if (!mgp->dca_enabled)
1116                 return;
1117         mgp->dca_enabled = 0;
1118         err = dca_remove_requester(&pdev->dev);
1119 }
1120
1121 static int myri10ge_notify_dca_device(struct device *dev, void *data)
1122 {
1123         struct myri10ge_priv *mgp;
1124         unsigned long event;
1125
1126         mgp = dev_get_drvdata(dev);
1127         event = *(unsigned long *)data;
1128
1129         if (event == DCA_PROVIDER_ADD)
1130                 myri10ge_setup_dca(mgp);
1131         else if (event == DCA_PROVIDER_REMOVE)
1132                 myri10ge_teardown_dca(mgp);
1133         return 0;
1134 }
1135 #endif                          /* CONFIG_MYRI10GE_DCA */
1136
1137 static inline void
1138 myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst,
1139                     struct mcp_kreq_ether_recv *src)
1140 {
1141         __be32 low;
1142
1143         low = src->addr_low;
1144         src->addr_low = htonl(DMA_BIT_MASK(32));
1145         myri10ge_pio_copy(dst, src, 4 * sizeof(*src));
1146         mb();
1147         myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src));
1148         mb();
1149         src->addr_low = low;
1150         put_be32(low, &dst->addr_low);
1151         mb();
1152 }
1153
1154 static inline void myri10ge_vlan_ip_csum(struct sk_buff *skb, __wsum hw_csum)
1155 {
1156         struct vlan_hdr *vh = (struct vlan_hdr *)(skb->data);
1157
1158         if ((skb->protocol == htons(ETH_P_8021Q)) &&
1159             (vh->h_vlan_encapsulated_proto == htons(ETH_P_IP) ||
1160              vh->h_vlan_encapsulated_proto == htons(ETH_P_IPV6))) {
1161                 skb->csum = hw_csum;
1162                 skb->ip_summed = CHECKSUM_COMPLETE;
1163         }
1164 }
1165
1166 static inline void
1167 myri10ge_rx_skb_build(struct sk_buff *skb, u8 * va,
1168                       struct skb_frag_struct *rx_frags, int len, int hlen)
1169 {
1170         struct skb_frag_struct *skb_frags;
1171
1172         skb->len = skb->data_len = len;
1173         skb->truesize = len + sizeof(struct sk_buff);
1174         /* attach the page(s) */
1175
1176         skb_frags = skb_shinfo(skb)->frags;
1177         while (len > 0) {
1178                 memcpy(skb_frags, rx_frags, sizeof(*skb_frags));
1179                 len -= rx_frags->size;
1180                 skb_frags++;
1181                 rx_frags++;
1182                 skb_shinfo(skb)->nr_frags++;
1183         }
1184
1185         /* pskb_may_pull is not available in irq context, but
1186          * skb_pull() (for ether_pad and eth_type_trans()) requires
1187          * the beginning of the packet in skb_headlen(), move it
1188          * manually */
1189         skb_copy_to_linear_data(skb, va, hlen);
1190         skb_shinfo(skb)->frags[0].page_offset += hlen;
1191         skb_shinfo(skb)->frags[0].size -= hlen;
1192         skb->data_len -= hlen;
1193         skb->tail += hlen;
1194         skb_pull(skb, MXGEFW_PAD);
1195 }
1196
1197 static void
1198 myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
1199                         int bytes, int watchdog)
1200 {
1201         struct page *page;
1202         int idx;
1203 #if MYRI10GE_ALLOC_SIZE > 4096
1204         int end_offset;
1205 #endif
1206
1207         if (unlikely(rx->watchdog_needed && !watchdog))
1208                 return;
1209
1210         /* try to refill entire ring */
1211         while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) {
1212                 idx = rx->fill_cnt & rx->mask;
1213                 if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) {
1214                         /* we can use part of previous page */
1215                         get_page(rx->page);
1216                 } else {
1217                         /* we need a new page */
1218                         page =
1219                             alloc_pages(GFP_ATOMIC | __GFP_COMP,
1220                                         MYRI10GE_ALLOC_ORDER);
1221                         if (unlikely(page == NULL)) {
1222                                 if (rx->fill_cnt - rx->cnt < 16)
1223                                         rx->watchdog_needed = 1;
1224                                 return;
1225                         }
1226                         rx->page = page;
1227                         rx->page_offset = 0;
1228                         rx->bus = pci_map_page(mgp->pdev, page, 0,
1229                                                MYRI10GE_ALLOC_SIZE,
1230                                                PCI_DMA_FROMDEVICE);
1231                 }
1232                 rx->info[idx].page = rx->page;
1233                 rx->info[idx].page_offset = rx->page_offset;
1234                 /* note that this is the address of the start of the
1235                  * page */
1236                 pci_unmap_addr_set(&rx->info[idx], bus, rx->bus);
1237                 rx->shadow[idx].addr_low =
1238                     htonl(MYRI10GE_LOWPART_TO_U32(rx->bus) + rx->page_offset);
1239                 rx->shadow[idx].addr_high =
1240                     htonl(MYRI10GE_HIGHPART_TO_U32(rx->bus));
1241
1242                 /* start next packet on a cacheline boundary */
1243                 rx->page_offset += SKB_DATA_ALIGN(bytes);
1244
1245 #if MYRI10GE_ALLOC_SIZE > 4096
1246                 /* don't cross a 4KB boundary */
1247                 end_offset = rx->page_offset + bytes - 1;
1248                 if ((unsigned)(rx->page_offset ^ end_offset) > 4095)
1249                         rx->page_offset = end_offset & ~4095;
1250 #endif
1251                 rx->fill_cnt++;
1252
1253                 /* copy 8 descriptors to the firmware at a time */
1254                 if ((idx & 7) == 7) {
1255                         myri10ge_submit_8rx(&rx->lanai[idx - 7],
1256                                             &rx->shadow[idx - 7]);
1257                 }
1258         }
1259 }
1260
1261 static inline void
1262 myri10ge_unmap_rx_page(struct pci_dev *pdev,
1263                        struct myri10ge_rx_buffer_state *info, int bytes)
1264 {
1265         /* unmap the recvd page if we're the only or last user of it */
1266         if (bytes >= MYRI10GE_ALLOC_SIZE / 2 ||
1267             (info->page_offset + 2 * bytes) > MYRI10GE_ALLOC_SIZE) {
1268                 pci_unmap_page(pdev, (pci_unmap_addr(info, bus)
1269                                       & ~(MYRI10GE_ALLOC_SIZE - 1)),
1270                                MYRI10GE_ALLOC_SIZE, PCI_DMA_FROMDEVICE);
1271         }
1272 }
1273
1274 #define MYRI10GE_HLEN 64        /* The number of bytes to copy from a
1275                                  * page into an skb */
1276
1277 static inline int
1278 myri10ge_rx_done(struct myri10ge_slice_state *ss, struct myri10ge_rx_buf *rx,
1279                  int bytes, int len, __wsum csum)
1280 {
1281         struct myri10ge_priv *mgp = ss->mgp;
1282         struct sk_buff *skb;
1283         struct skb_frag_struct rx_frags[MYRI10GE_MAX_FRAGS_PER_FRAME];
1284         int i, idx, hlen, remainder;
1285         struct pci_dev *pdev = mgp->pdev;
1286         struct net_device *dev = mgp->dev;
1287         u8 *va;
1288
1289         len += MXGEFW_PAD;
1290         idx = rx->cnt & rx->mask;
1291         va = page_address(rx->info[idx].page) + rx->info[idx].page_offset;
1292         prefetch(va);
1293         /* Fill skb_frag_struct(s) with data from our receive */
1294         for (i = 0, remainder = len; remainder > 0; i++) {
1295                 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1296                 rx_frags[i].page = rx->info[idx].page;
1297                 rx_frags[i].page_offset = rx->info[idx].page_offset;
1298                 if (remainder < MYRI10GE_ALLOC_SIZE)
1299                         rx_frags[i].size = remainder;
1300                 else
1301                         rx_frags[i].size = MYRI10GE_ALLOC_SIZE;
1302                 rx->cnt++;
1303                 idx = rx->cnt & rx->mask;
1304                 remainder -= MYRI10GE_ALLOC_SIZE;
1305         }
1306
1307         if (dev->features & NETIF_F_LRO) {
1308                 rx_frags[0].page_offset += MXGEFW_PAD;
1309                 rx_frags[0].size -= MXGEFW_PAD;
1310                 len -= MXGEFW_PAD;
1311                 lro_receive_frags(&ss->rx_done.lro_mgr, rx_frags,
1312                                   /* opaque, will come back in get_frag_header */
1313                                   len, len,
1314                                   (void *)(__force unsigned long)csum, csum);
1315
1316                 return 1;
1317         }
1318
1319         hlen = MYRI10GE_HLEN > len ? len : MYRI10GE_HLEN;
1320
1321         /* allocate an skb to attach the page(s) to. This is done
1322          * after trying LRO, so as to avoid skb allocation overheads */
1323
1324         skb = netdev_alloc_skb(dev, MYRI10GE_HLEN + 16);
1325         if (unlikely(skb == NULL)) {
1326                 ss->stats.rx_dropped++;
1327                 do {
1328                         i--;
1329                         put_page(rx_frags[i].page);
1330                 } while (i != 0);
1331                 return 0;
1332         }
1333
1334         /* Attach the pages to the skb, and trim off any padding */
1335         myri10ge_rx_skb_build(skb, va, rx_frags, len, hlen);
1336         if (skb_shinfo(skb)->frags[0].size <= 0) {
1337                 put_page(skb_shinfo(skb)->frags[0].page);
1338                 skb_shinfo(skb)->nr_frags = 0;
1339         }
1340         skb->protocol = eth_type_trans(skb, dev);
1341         skb_record_rx_queue(skb, ss - &mgp->ss[0]);
1342
1343         if (mgp->csum_flag) {
1344                 if ((skb->protocol == htons(ETH_P_IP)) ||
1345                     (skb->protocol == htons(ETH_P_IPV6))) {
1346                         skb->csum = csum;
1347                         skb->ip_summed = CHECKSUM_COMPLETE;
1348                 } else
1349                         myri10ge_vlan_ip_csum(skb, csum);
1350         }
1351         netif_receive_skb(skb);
1352         return 1;
1353 }
1354
1355 static inline void
1356 myri10ge_tx_done(struct myri10ge_slice_state *ss, int mcp_index)
1357 {
1358         struct pci_dev *pdev = ss->mgp->pdev;
1359         struct myri10ge_tx_buf *tx = &ss->tx;
1360         struct netdev_queue *dev_queue;
1361         struct sk_buff *skb;
1362         int idx, len;
1363
1364         while (tx->pkt_done != mcp_index) {
1365                 idx = tx->done & tx->mask;
1366                 skb = tx->info[idx].skb;
1367
1368                 /* Mark as free */
1369                 tx->info[idx].skb = NULL;
1370                 if (tx->info[idx].last) {
1371                         tx->pkt_done++;
1372                         tx->info[idx].last = 0;
1373                 }
1374                 tx->done++;
1375                 len = pci_unmap_len(&tx->info[idx], len);
1376                 pci_unmap_len_set(&tx->info[idx], len, 0);
1377                 if (skb) {
1378                         ss->stats.tx_bytes += skb->len;
1379                         ss->stats.tx_packets++;
1380                         dev_kfree_skb_irq(skb);
1381                         if (len)
1382                                 pci_unmap_single(pdev,
1383                                                  pci_unmap_addr(&tx->info[idx],
1384                                                                 bus), len,
1385                                                  PCI_DMA_TODEVICE);
1386                 } else {
1387                         if (len)
1388                                 pci_unmap_page(pdev,
1389                                                pci_unmap_addr(&tx->info[idx],
1390                                                               bus), len,
1391                                                PCI_DMA_TODEVICE);
1392                 }
1393         }
1394
1395         dev_queue = netdev_get_tx_queue(ss->dev, ss - ss->mgp->ss);
1396         /*
1397          * Make a minimal effort to prevent the NIC from polling an
1398          * idle tx queue.  If we can't get the lock we leave the queue
1399          * active. In this case, either a thread was about to start
1400          * using the queue anyway, or we lost a race and the NIC will
1401          * waste some of its resources polling an inactive queue for a
1402          * while.
1403          */
1404
1405         if ((ss->mgp->dev->real_num_tx_queues > 1) &&
1406             __netif_tx_trylock(dev_queue)) {
1407                 if (tx->req == tx->done) {
1408                         tx->queue_active = 0;
1409                         put_be32(htonl(1), tx->send_stop);
1410                         mb();
1411                         mmiowb();
1412                 }
1413                 __netif_tx_unlock(dev_queue);
1414         }
1415
1416         /* start the queue if we've stopped it */
1417         if (netif_tx_queue_stopped(dev_queue) &&
1418             tx->req - tx->done < (tx->mask >> 1)) {
1419                 tx->wake_queue++;
1420                 netif_tx_wake_queue(dev_queue);
1421         }
1422 }
1423
1424 static inline int
1425 myri10ge_clean_rx_done(struct myri10ge_slice_state *ss, int budget)
1426 {
1427         struct myri10ge_rx_done *rx_done = &ss->rx_done;
1428         struct myri10ge_priv *mgp = ss->mgp;
1429         struct net_device *netdev = mgp->dev;
1430         unsigned long rx_bytes = 0;
1431         unsigned long rx_packets = 0;
1432         unsigned long rx_ok;
1433
1434         int idx = rx_done->idx;
1435         int cnt = rx_done->cnt;
1436         int work_done = 0;
1437         u16 length;
1438         __wsum checksum;
1439
1440         while (rx_done->entry[idx].length != 0 && work_done < budget) {
1441                 length = ntohs(rx_done->entry[idx].length);
1442                 rx_done->entry[idx].length = 0;
1443                 checksum = csum_unfold(rx_done->entry[idx].checksum);
1444                 if (length <= mgp->small_bytes)
1445                         rx_ok = myri10ge_rx_done(ss, &ss->rx_small,
1446                                                  mgp->small_bytes,
1447                                                  length, checksum);
1448                 else
1449                         rx_ok = myri10ge_rx_done(ss, &ss->rx_big,
1450                                                  mgp->big_bytes,
1451                                                  length, checksum);
1452                 rx_packets += rx_ok;
1453                 rx_bytes += rx_ok * (unsigned long)length;
1454                 cnt++;
1455                 idx = cnt & (mgp->max_intr_slots - 1);
1456                 work_done++;
1457         }
1458         rx_done->idx = idx;
1459         rx_done->cnt = cnt;
1460         ss->stats.rx_packets += rx_packets;
1461         ss->stats.rx_bytes += rx_bytes;
1462
1463         if (netdev->features & NETIF_F_LRO)
1464                 lro_flush_all(&rx_done->lro_mgr);
1465
1466         /* restock receive rings if needed */
1467         if (ss->rx_small.fill_cnt - ss->rx_small.cnt < myri10ge_fill_thresh)
1468                 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
1469                                         mgp->small_bytes + MXGEFW_PAD, 0);
1470         if (ss->rx_big.fill_cnt - ss->rx_big.cnt < myri10ge_fill_thresh)
1471                 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
1472
1473         return work_done;
1474 }
1475
1476 static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
1477 {
1478         struct mcp_irq_data *stats = mgp->ss[0].fw_stats;
1479
1480         if (unlikely(stats->stats_updated)) {
1481                 unsigned link_up = ntohl(stats->link_up);
1482                 if (mgp->link_state != link_up) {
1483                         mgp->link_state = link_up;
1484
1485                         if (mgp->link_state == MXGEFW_LINK_UP) {
1486                                 if (netif_msg_link(mgp))
1487                                         netdev_info(mgp->dev, "link up\n");
1488                                 netif_carrier_on(mgp->dev);
1489                                 mgp->link_changes++;
1490                         } else {
1491                                 if (netif_msg_link(mgp))
1492                                         netdev_info(mgp->dev, "link %s\n",
1493                                             link_up == MXGEFW_LINK_MYRINET ?
1494                                             "mismatch (Myrinet detected)" :
1495                                             "down");
1496                                 netif_carrier_off(mgp->dev);
1497                                 mgp->link_changes++;
1498                         }
1499                 }
1500                 if (mgp->rdma_tags_available !=
1501                     ntohl(stats->rdma_tags_available)) {
1502                         mgp->rdma_tags_available =
1503                             ntohl(stats->rdma_tags_available);
1504                         netdev_warn(mgp->dev, "RDMA timed out! %d tags left\n",
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                         netdev_err(mgp->dev, "irq stuck?\n");
1577                         stats->valid = 0;
1578                         schedule_work(&mgp->watchdog_work);
1579                 }
1580                 if (likely(stats->valid == 0))
1581                         break;
1582                 cpu_relax();
1583                 barrier();
1584         }
1585
1586         /* Only slice 0 updates stats */
1587         if (ss == mgp->ss)
1588                 myri10ge_check_statblock(mgp);
1589
1590         put_be32(htonl(3), ss->irq_claim + 1);
1591         return (IRQ_HANDLED);
1592 }
1593
1594 static int
1595 myri10ge_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
1596 {
1597         struct myri10ge_priv *mgp = netdev_priv(netdev);
1598         char *ptr;
1599         int i;
1600
1601         cmd->autoneg = AUTONEG_DISABLE;
1602         cmd->speed = SPEED_10000;
1603         cmd->duplex = DUPLEX_FULL;
1604
1605         /*
1606          * parse the product code to deterimine the interface type
1607          * (CX4, XFP, Quad Ribbon Fiber) by looking at the character
1608          * after the 3rd dash in the driver's cached copy of the
1609          * EEPROM's product code string.
1610          */
1611         ptr = mgp->product_code_string;
1612         if (ptr == NULL) {
1613                 netdev_err(netdev, "Missing product code\n");
1614                 return 0;
1615         }
1616         for (i = 0; i < 3; i++, ptr++) {
1617                 ptr = strchr(ptr, '-');
1618                 if (ptr == NULL) {
1619                         netdev_err(netdev, "Invalid product code %s\n",
1620                                    mgp->product_code_string);
1621                         return 0;
1622                 }
1623         }
1624         if (*ptr == '2')
1625                 ptr++;
1626         if (*ptr == 'R' || *ptr == 'Q' || *ptr == 'S') {
1627                 /* We've found either an XFP, quad ribbon fiber, or SFP+ */
1628                 cmd->port = PORT_FIBRE;
1629                 cmd->supported |= SUPPORTED_FIBRE;
1630                 cmd->advertising |= ADVERTISED_FIBRE;
1631         } else {
1632                 cmd->port = PORT_OTHER;
1633         }
1634         if (*ptr == 'R' || *ptr == 'S')
1635                 cmd->transceiver = XCVR_EXTERNAL;
1636         else
1637                 cmd->transceiver = XCVR_INTERNAL;
1638
1639         return 0;
1640 }
1641
1642 static void
1643 myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
1644 {
1645         struct myri10ge_priv *mgp = netdev_priv(netdev);
1646
1647         strlcpy(info->driver, "myri10ge", sizeof(info->driver));
1648         strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version));
1649         strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version));
1650         strlcpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info));
1651 }
1652
1653 static int
1654 myri10ge_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1655 {
1656         struct myri10ge_priv *mgp = netdev_priv(netdev);
1657
1658         coal->rx_coalesce_usecs = mgp->intr_coal_delay;
1659         return 0;
1660 }
1661
1662 static int
1663 myri10ge_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1664 {
1665         struct myri10ge_priv *mgp = netdev_priv(netdev);
1666
1667         mgp->intr_coal_delay = coal->rx_coalesce_usecs;
1668         put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1669         return 0;
1670 }
1671
1672 static void
1673 myri10ge_get_pauseparam(struct net_device *netdev,
1674                         struct ethtool_pauseparam *pause)
1675 {
1676         struct myri10ge_priv *mgp = netdev_priv(netdev);
1677
1678         pause->autoneg = 0;
1679         pause->rx_pause = mgp->pause;
1680         pause->tx_pause = mgp->pause;
1681 }
1682
1683 static int
1684 myri10ge_set_pauseparam(struct net_device *netdev,
1685                         struct ethtool_pauseparam *pause)
1686 {
1687         struct myri10ge_priv *mgp = netdev_priv(netdev);
1688
1689         if (pause->tx_pause != mgp->pause)
1690                 return myri10ge_change_pause(mgp, pause->tx_pause);
1691         if (pause->rx_pause != mgp->pause)
1692                 return myri10ge_change_pause(mgp, pause->tx_pause);
1693         if (pause->autoneg != 0)
1694                 return -EINVAL;
1695         return 0;
1696 }
1697
1698 static void
1699 myri10ge_get_ringparam(struct net_device *netdev,
1700                        struct ethtool_ringparam *ring)
1701 {
1702         struct myri10ge_priv *mgp = netdev_priv(netdev);
1703
1704         ring->rx_mini_max_pending = mgp->ss[0].rx_small.mask + 1;
1705         ring->rx_max_pending = mgp->ss[0].rx_big.mask + 1;
1706         ring->rx_jumbo_max_pending = 0;
1707         ring->tx_max_pending = mgp->ss[0].tx.mask + 1;
1708         ring->rx_mini_pending = ring->rx_mini_max_pending;
1709         ring->rx_pending = ring->rx_max_pending;
1710         ring->rx_jumbo_pending = ring->rx_jumbo_max_pending;
1711         ring->tx_pending = ring->tx_max_pending;
1712 }
1713
1714 static u32 myri10ge_get_rx_csum(struct net_device *netdev)
1715 {
1716         struct myri10ge_priv *mgp = netdev_priv(netdev);
1717
1718         if (mgp->csum_flag)
1719                 return 1;
1720         else
1721                 return 0;
1722 }
1723
1724 static int myri10ge_set_rx_csum(struct net_device *netdev, u32 csum_enabled)
1725 {
1726         struct myri10ge_priv *mgp = netdev_priv(netdev);
1727         int err = 0;
1728
1729         if (csum_enabled)
1730                 mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
1731         else {
1732                 u32 flags = ethtool_op_get_flags(netdev);
1733                 err = ethtool_op_set_flags(netdev, (flags & ~ETH_FLAG_LRO));
1734                 mgp->csum_flag = 0;
1735
1736         }
1737         return err;
1738 }
1739
1740 static int myri10ge_set_tso(struct net_device *netdev, u32 tso_enabled)
1741 {
1742         struct myri10ge_priv *mgp = netdev_priv(netdev);
1743         unsigned long flags = mgp->features & (NETIF_F_TSO6 | NETIF_F_TSO);
1744
1745         if (tso_enabled)
1746                 netdev->features |= flags;
1747         else
1748                 netdev->features &= ~flags;
1749         return 0;
1750 }
1751
1752 static const char myri10ge_gstrings_main_stats[][ETH_GSTRING_LEN] = {
1753         "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
1754         "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
1755         "rx_length_errors", "rx_over_errors", "rx_crc_errors",
1756         "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
1757         "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
1758         "tx_heartbeat_errors", "tx_window_errors",
1759         /* device-specific stats */
1760         "tx_boundary", "WC", "irq", "MSI", "MSIX",
1761         "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
1762         "serial_number", "watchdog_resets",
1763 #ifdef CONFIG_MYRI10GE_DCA
1764         "dca_capable_firmware", "dca_device_present",
1765 #endif
1766         "link_changes", "link_up", "dropped_link_overflow",
1767         "dropped_link_error_or_filtered",
1768         "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32",
1769         "dropped_unicast_filtered", "dropped_multicast_filtered",
1770         "dropped_runt", "dropped_overrun", "dropped_no_small_buffer",
1771         "dropped_no_big_buffer"
1772 };
1773
1774 static const char myri10ge_gstrings_slice_stats[][ETH_GSTRING_LEN] = {
1775         "----------- slice ---------",
1776         "tx_pkt_start", "tx_pkt_done", "tx_req", "tx_done",
1777         "rx_small_cnt", "rx_big_cnt",
1778         "wake_queue", "stop_queue", "tx_linearized", "LRO aggregated",
1779             "LRO flushed",
1780         "LRO avg aggr", "LRO no_desc"
1781 };
1782
1783 #define MYRI10GE_NET_STATS_LEN      21
1784 #define MYRI10GE_MAIN_STATS_LEN  ARRAY_SIZE(myri10ge_gstrings_main_stats)
1785 #define MYRI10GE_SLICE_STATS_LEN  ARRAY_SIZE(myri10ge_gstrings_slice_stats)
1786
1787 static void
1788 myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
1789 {
1790         struct myri10ge_priv *mgp = netdev_priv(netdev);
1791         int i;
1792
1793         switch (stringset) {
1794         case ETH_SS_STATS:
1795                 memcpy(data, *myri10ge_gstrings_main_stats,
1796                        sizeof(myri10ge_gstrings_main_stats));
1797                 data += sizeof(myri10ge_gstrings_main_stats);
1798                 for (i = 0; i < mgp->num_slices; i++) {
1799                         memcpy(data, *myri10ge_gstrings_slice_stats,
1800                                sizeof(myri10ge_gstrings_slice_stats));
1801                         data += sizeof(myri10ge_gstrings_slice_stats);
1802                 }
1803                 break;
1804         }
1805 }
1806
1807 static int myri10ge_get_sset_count(struct net_device *netdev, int sset)
1808 {
1809         struct myri10ge_priv *mgp = netdev_priv(netdev);
1810
1811         switch (sset) {
1812         case ETH_SS_STATS:
1813                 return MYRI10GE_MAIN_STATS_LEN +
1814                     mgp->num_slices * MYRI10GE_SLICE_STATS_LEN;
1815         default:
1816                 return -EOPNOTSUPP;
1817         }
1818 }
1819
1820 static void
1821 myri10ge_get_ethtool_stats(struct net_device *netdev,
1822                            struct ethtool_stats *stats, u64 * data)
1823 {
1824         struct myri10ge_priv *mgp = netdev_priv(netdev);
1825         struct myri10ge_slice_state *ss;
1826         int slice;
1827         int i;
1828
1829         /* force stats update */
1830         (void)myri10ge_get_stats(netdev);
1831         for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++)
1832                 data[i] = ((unsigned long *)&netdev->stats)[i];
1833
1834         data[i++] = (unsigned int)mgp->tx_boundary;
1835         data[i++] = (unsigned int)mgp->wc_enabled;
1836         data[i++] = (unsigned int)mgp->pdev->irq;
1837         data[i++] = (unsigned int)mgp->msi_enabled;
1838         data[i++] = (unsigned int)mgp->msix_enabled;
1839         data[i++] = (unsigned int)mgp->read_dma;
1840         data[i++] = (unsigned int)mgp->write_dma;
1841         data[i++] = (unsigned int)mgp->read_write_dma;
1842         data[i++] = (unsigned int)mgp->serial_number;
1843         data[i++] = (unsigned int)mgp->watchdog_resets;
1844 #ifdef CONFIG_MYRI10GE_DCA
1845         data[i++] = (unsigned int)(mgp->ss[0].dca_tag != NULL);
1846         data[i++] = (unsigned int)(mgp->dca_enabled);
1847 #endif
1848         data[i++] = (unsigned int)mgp->link_changes;
1849
1850         /* firmware stats are useful only in the first slice */
1851         ss = &mgp->ss[0];
1852         data[i++] = (unsigned int)ntohl(ss->fw_stats->link_up);
1853         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_link_overflow);
1854         data[i++] =
1855             (unsigned int)ntohl(ss->fw_stats->dropped_link_error_or_filtered);
1856         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_pause);
1857         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_phy);
1858         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_crc32);
1859         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_unicast_filtered);
1860         data[i++] =
1861             (unsigned int)ntohl(ss->fw_stats->dropped_multicast_filtered);
1862         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_runt);
1863         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_overrun);
1864         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_small_buffer);
1865         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_big_buffer);
1866
1867         for (slice = 0; slice < mgp->num_slices; slice++) {
1868                 ss = &mgp->ss[slice];
1869                 data[i++] = slice;
1870                 data[i++] = (unsigned int)ss->tx.pkt_start;
1871                 data[i++] = (unsigned int)ss->tx.pkt_done;
1872                 data[i++] = (unsigned int)ss->tx.req;
1873                 data[i++] = (unsigned int)ss->tx.done;
1874                 data[i++] = (unsigned int)ss->rx_small.cnt;
1875                 data[i++] = (unsigned int)ss->rx_big.cnt;
1876                 data[i++] = (unsigned int)ss->tx.wake_queue;
1877                 data[i++] = (unsigned int)ss->tx.stop_queue;
1878                 data[i++] = (unsigned int)ss->tx.linearized;
1879                 data[i++] = ss->rx_done.lro_mgr.stats.aggregated;
1880                 data[i++] = ss->rx_done.lro_mgr.stats.flushed;
1881                 if (ss->rx_done.lro_mgr.stats.flushed)
1882                         data[i++] = ss->rx_done.lro_mgr.stats.aggregated /
1883                             ss->rx_done.lro_mgr.stats.flushed;
1884                 else
1885                         data[i++] = 0;
1886                 data[i++] = ss->rx_done.lro_mgr.stats.no_desc;
1887         }
1888 }
1889
1890 static void myri10ge_set_msglevel(struct net_device *netdev, u32 value)
1891 {
1892         struct myri10ge_priv *mgp = netdev_priv(netdev);
1893         mgp->msg_enable = value;
1894 }
1895
1896 static u32 myri10ge_get_msglevel(struct net_device *netdev)
1897 {
1898         struct myri10ge_priv *mgp = netdev_priv(netdev);
1899         return mgp->msg_enable;
1900 }
1901
1902 static const struct ethtool_ops myri10ge_ethtool_ops = {
1903         .get_settings = myri10ge_get_settings,
1904         .get_drvinfo = myri10ge_get_drvinfo,
1905         .get_coalesce = myri10ge_get_coalesce,
1906         .set_coalesce = myri10ge_set_coalesce,
1907         .get_pauseparam = myri10ge_get_pauseparam,
1908         .set_pauseparam = myri10ge_set_pauseparam,
1909         .get_ringparam = myri10ge_get_ringparam,
1910         .get_rx_csum = myri10ge_get_rx_csum,
1911         .set_rx_csum = myri10ge_set_rx_csum,
1912         .set_tx_csum = ethtool_op_set_tx_hw_csum,
1913         .set_sg = ethtool_op_set_sg,
1914         .set_tso = myri10ge_set_tso,
1915         .get_link = ethtool_op_get_link,
1916         .get_strings = myri10ge_get_strings,
1917         .get_sset_count = myri10ge_get_sset_count,
1918         .get_ethtool_stats = myri10ge_get_ethtool_stats,
1919         .set_msglevel = myri10ge_set_msglevel,
1920         .get_msglevel = myri10ge_get_msglevel,
1921         .get_flags = ethtool_op_get_flags,
1922         .set_flags = ethtool_op_set_flags
1923 };
1924
1925 static int myri10ge_allocate_rings(struct myri10ge_slice_state *ss)
1926 {
1927         struct myri10ge_priv *mgp = ss->mgp;
1928         struct myri10ge_cmd cmd;
1929         struct net_device *dev = mgp->dev;
1930         int tx_ring_size, rx_ring_size;
1931         int tx_ring_entries, rx_ring_entries;
1932         int i, slice, status;
1933         size_t bytes;
1934
1935         /* get ring sizes */
1936         slice = ss - mgp->ss;
1937         cmd.data0 = slice;
1938         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0);
1939         tx_ring_size = cmd.data0;
1940         cmd.data0 = slice;
1941         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
1942         if (status != 0)
1943                 return status;
1944         rx_ring_size = cmd.data0;
1945
1946         tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send);
1947         rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr);
1948         ss->tx.mask = tx_ring_entries - 1;
1949         ss->rx_small.mask = ss->rx_big.mask = rx_ring_entries - 1;
1950
1951         status = -ENOMEM;
1952
1953         /* allocate the host shadow rings */
1954
1955         bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4)
1956             * sizeof(*ss->tx.req_list);
1957         ss->tx.req_bytes = kzalloc(bytes, GFP_KERNEL);
1958         if (ss->tx.req_bytes == NULL)
1959                 goto abort_with_nothing;
1960
1961         /* ensure req_list entries are aligned to 8 bytes */
1962         ss->tx.req_list = (struct mcp_kreq_ether_send *)
1963             ALIGN((unsigned long)ss->tx.req_bytes, 8);
1964         ss->tx.queue_active = 0;
1965
1966         bytes = rx_ring_entries * sizeof(*ss->rx_small.shadow);
1967         ss->rx_small.shadow = kzalloc(bytes, GFP_KERNEL);
1968         if (ss->rx_small.shadow == NULL)
1969                 goto abort_with_tx_req_bytes;
1970
1971         bytes = rx_ring_entries * sizeof(*ss->rx_big.shadow);
1972         ss->rx_big.shadow = kzalloc(bytes, GFP_KERNEL);
1973         if (ss->rx_big.shadow == NULL)
1974                 goto abort_with_rx_small_shadow;
1975
1976         /* allocate the host info rings */
1977
1978         bytes = tx_ring_entries * sizeof(*ss->tx.info);
1979         ss->tx.info = kzalloc(bytes, GFP_KERNEL);
1980         if (ss->tx.info == NULL)
1981                 goto abort_with_rx_big_shadow;
1982
1983         bytes = rx_ring_entries * sizeof(*ss->rx_small.info);
1984         ss->rx_small.info = kzalloc(bytes, GFP_KERNEL);
1985         if (ss->rx_small.info == NULL)
1986                 goto abort_with_tx_info;
1987
1988         bytes = rx_ring_entries * sizeof(*ss->rx_big.info);
1989         ss->rx_big.info = kzalloc(bytes, GFP_KERNEL);
1990         if (ss->rx_big.info == NULL)
1991                 goto abort_with_rx_small_info;
1992
1993         /* Fill the receive rings */
1994         ss->rx_big.cnt = 0;
1995         ss->rx_small.cnt = 0;
1996         ss->rx_big.fill_cnt = 0;
1997         ss->rx_small.fill_cnt = 0;
1998         ss->rx_small.page_offset = MYRI10GE_ALLOC_SIZE;
1999         ss->rx_big.page_offset = MYRI10GE_ALLOC_SIZE;
2000         ss->rx_small.watchdog_needed = 0;
2001         ss->rx_big.watchdog_needed = 0;
2002         myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
2003                                 mgp->small_bytes + MXGEFW_PAD, 0);
2004
2005         if (ss->rx_small.fill_cnt < ss->rx_small.mask + 1) {
2006                 netdev_err(dev, "slice-%d: alloced only %d small bufs\n",
2007                            slice, ss->rx_small.fill_cnt);
2008                 goto abort_with_rx_small_ring;
2009         }
2010
2011         myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
2012         if (ss->rx_big.fill_cnt < ss->rx_big.mask + 1) {
2013                 netdev_err(dev, "slice-%d: alloced only %d big bufs\n",
2014                            slice, ss->rx_big.fill_cnt);
2015                 goto abort_with_rx_big_ring;
2016         }
2017
2018         return 0;
2019
2020 abort_with_rx_big_ring:
2021         for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2022                 int idx = i & ss->rx_big.mask;
2023                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2024                                        mgp->big_bytes);
2025                 put_page(ss->rx_big.info[idx].page);
2026         }
2027
2028 abort_with_rx_small_ring:
2029         for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2030                 int idx = i & ss->rx_small.mask;
2031                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2032                                        mgp->small_bytes + MXGEFW_PAD);
2033                 put_page(ss->rx_small.info[idx].page);
2034         }
2035
2036         kfree(ss->rx_big.info);
2037
2038 abort_with_rx_small_info:
2039         kfree(ss->rx_small.info);
2040
2041 abort_with_tx_info:
2042         kfree(ss->tx.info);
2043
2044 abort_with_rx_big_shadow:
2045         kfree(ss->rx_big.shadow);
2046
2047 abort_with_rx_small_shadow:
2048         kfree(ss->rx_small.shadow);
2049
2050 abort_with_tx_req_bytes:
2051         kfree(ss->tx.req_bytes);
2052         ss->tx.req_bytes = NULL;
2053         ss->tx.req_list = NULL;
2054
2055 abort_with_nothing:
2056         return status;
2057 }
2058
2059 static void myri10ge_free_rings(struct myri10ge_slice_state *ss)
2060 {
2061         struct myri10ge_priv *mgp = ss->mgp;
2062         struct sk_buff *skb;
2063         struct myri10ge_tx_buf *tx;
2064         int i, len, idx;
2065
2066         /* If not allocated, skip it */
2067         if (ss->tx.req_list == NULL)
2068                 return;
2069
2070         for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2071                 idx = i & ss->rx_big.mask;
2072                 if (i == ss->rx_big.fill_cnt - 1)
2073                         ss->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE;
2074                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2075                                        mgp->big_bytes);
2076                 put_page(ss->rx_big.info[idx].page);
2077         }
2078
2079         for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2080                 idx = i & ss->rx_small.mask;
2081                 if (i == ss->rx_small.fill_cnt - 1)
2082                         ss->rx_small.info[idx].page_offset =
2083                             MYRI10GE_ALLOC_SIZE;
2084                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2085                                        mgp->small_bytes + MXGEFW_PAD);
2086                 put_page(ss->rx_small.info[idx].page);
2087         }
2088         tx = &ss->tx;
2089         while (tx->done != tx->req) {
2090                 idx = tx->done & tx->mask;
2091                 skb = tx->info[idx].skb;
2092
2093                 /* Mark as free */
2094                 tx->info[idx].skb = NULL;
2095                 tx->done++;
2096                 len = pci_unmap_len(&tx->info[idx], len);
2097                 pci_unmap_len_set(&tx->info[idx], len, 0);
2098                 if (skb) {
2099                         ss->stats.tx_dropped++;
2100                         dev_kfree_skb_any(skb);
2101                         if (len)
2102                                 pci_unmap_single(mgp->pdev,
2103                                                  pci_unmap_addr(&tx->info[idx],
2104                                                                 bus), len,
2105                                                  PCI_DMA_TODEVICE);
2106                 } else {
2107                         if (len)
2108                                 pci_unmap_page(mgp->pdev,
2109                                                pci_unmap_addr(&tx->info[idx],
2110                                                               bus), len,
2111                                                PCI_DMA_TODEVICE);
2112                 }
2113         }
2114         kfree(ss->rx_big.info);
2115
2116         kfree(ss->rx_small.info);
2117
2118         kfree(ss->tx.info);
2119
2120         kfree(ss->rx_big.shadow);
2121
2122         kfree(ss->rx_small.shadow);
2123
2124         kfree(ss->tx.req_bytes);
2125         ss->tx.req_bytes = NULL;
2126         ss->tx.req_list = NULL;
2127 }
2128
2129 static int myri10ge_request_irq(struct myri10ge_priv *mgp)
2130 {
2131         struct pci_dev *pdev = mgp->pdev;
2132         struct myri10ge_slice_state *ss;
2133         struct net_device *netdev = mgp->dev;
2134         int i;
2135         int status;
2136
2137         mgp->msi_enabled = 0;
2138         mgp->msix_enabled = 0;
2139         status = 0;
2140         if (myri10ge_msi) {
2141                 if (mgp->num_slices > 1) {
2142                         status =
2143                             pci_enable_msix(pdev, mgp->msix_vectors,
2144                                             mgp->num_slices);
2145                         if (status == 0) {
2146                                 mgp->msix_enabled = 1;
2147                         } else {
2148                                 dev_err(&pdev->dev,
2149                                         "Error %d setting up MSI-X\n", status);
2150                                 return status;
2151                         }
2152                 }
2153                 if (mgp->msix_enabled == 0) {
2154                         status = pci_enable_msi(pdev);
2155                         if (status != 0) {
2156                                 dev_err(&pdev->dev,
2157                                         "Error %d setting up MSI; falling back to xPIC\n",
2158                                         status);
2159                         } else {
2160                                 mgp->msi_enabled = 1;
2161                         }
2162                 }
2163         }
2164         if (mgp->msix_enabled) {
2165                 for (i = 0; i < mgp->num_slices; i++) {
2166                         ss = &mgp->ss[i];
2167                         snprintf(ss->irq_desc, sizeof(ss->irq_desc),
2168                                  "%s:slice-%d", netdev->name, i);
2169                         status = request_irq(mgp->msix_vectors[i].vector,
2170                                              myri10ge_intr, 0, ss->irq_desc,
2171                                              ss);
2172                         if (status != 0) {
2173                                 dev_err(&pdev->dev,
2174                                         "slice %d failed to allocate IRQ\n", i);
2175                                 i--;
2176                                 while (i >= 0) {
2177                                         free_irq(mgp->msix_vectors[i].vector,
2178                                                  &mgp->ss[i]);
2179                                         i--;
2180                                 }
2181                                 pci_disable_msix(pdev);
2182                                 return status;
2183                         }
2184                 }
2185         } else {
2186                 status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED,
2187                                      mgp->dev->name, &mgp->ss[0]);
2188                 if (status != 0) {
2189                         dev_err(&pdev->dev, "failed to allocate IRQ\n");
2190                         if (mgp->msi_enabled)
2191                                 pci_disable_msi(pdev);
2192                 }
2193         }
2194         return status;
2195 }
2196
2197 static void myri10ge_free_irq(struct myri10ge_priv *mgp)
2198 {
2199         struct pci_dev *pdev = mgp->pdev;
2200         int i;
2201
2202         if (mgp->msix_enabled) {
2203                 for (i = 0; i < mgp->num_slices; i++)
2204                         free_irq(mgp->msix_vectors[i].vector, &mgp->ss[i]);
2205         } else {
2206                 free_irq(pdev->irq, &mgp->ss[0]);
2207         }
2208         if (mgp->msi_enabled)
2209                 pci_disable_msi(pdev);
2210         if (mgp->msix_enabled)
2211                 pci_disable_msix(pdev);
2212 }
2213
2214 static int
2215 myri10ge_get_frag_header(struct skb_frag_struct *frag, void **mac_hdr,
2216                          void **ip_hdr, void **tcpudp_hdr,
2217                          u64 * hdr_flags, void *priv)
2218 {
2219         struct ethhdr *eh;
2220         struct vlan_ethhdr *veh;
2221         struct iphdr *iph;
2222         u8 *va = page_address(frag->page) + frag->page_offset;
2223         unsigned long ll_hlen;
2224         /* passed opaque through lro_receive_frags() */
2225         __wsum csum = (__force __wsum) (unsigned long)priv;
2226
2227         /* find the mac header, aborting if not IPv4 */
2228
2229         eh = (struct ethhdr *)va;
2230         *mac_hdr = eh;
2231         ll_hlen = ETH_HLEN;
2232         if (eh->h_proto != htons(ETH_P_IP)) {
2233                 if (eh->h_proto == htons(ETH_P_8021Q)) {
2234                         veh = (struct vlan_ethhdr *)va;
2235                         if (veh->h_vlan_encapsulated_proto != htons(ETH_P_IP))
2236                                 return -1;
2237
2238                         ll_hlen += VLAN_HLEN;
2239
2240                         /*
2241                          *  HW checksum starts ETH_HLEN bytes into
2242                          *  frame, so we must subtract off the VLAN
2243                          *  header's checksum before csum can be used
2244                          */
2245                         csum = csum_sub(csum, csum_partial(va + ETH_HLEN,
2246                                                            VLAN_HLEN, 0));
2247                 } else {
2248                         return -1;
2249                 }
2250         }
2251         *hdr_flags = LRO_IPV4;
2252
2253         iph = (struct iphdr *)(va + ll_hlen);
2254         *ip_hdr = iph;
2255         if (iph->protocol != IPPROTO_TCP)
2256                 return -1;
2257         if (iph->frag_off & htons(IP_MF | IP_OFFSET))
2258                 return -1;
2259         *hdr_flags |= LRO_TCP;
2260         *tcpudp_hdr = (u8 *) (*ip_hdr) + (iph->ihl << 2);
2261
2262         /* verify the IP checksum */
2263         if (unlikely(ip_fast_csum((u8 *) iph, iph->ihl)))
2264                 return -1;
2265
2266         /* verify the  checksum */
2267         if (unlikely(csum_tcpudp_magic(iph->saddr, iph->daddr,
2268                                        ntohs(iph->tot_len) - (iph->ihl << 2),
2269                                        IPPROTO_TCP, csum)))
2270                 return -1;
2271
2272         return 0;
2273 }
2274
2275 static int myri10ge_get_txrx(struct myri10ge_priv *mgp, int slice)
2276 {
2277         struct myri10ge_cmd cmd;
2278         struct myri10ge_slice_state *ss;
2279         int status;
2280
2281         ss = &mgp->ss[slice];
2282         status = 0;
2283         if (slice == 0 || (mgp->dev->real_num_tx_queues > 1)) {
2284                 cmd.data0 = slice;
2285                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET,
2286                                            &cmd, 0);
2287                 ss->tx.lanai = (struct mcp_kreq_ether_send __iomem *)
2288                     (mgp->sram + cmd.data0);
2289         }
2290         cmd.data0 = slice;
2291         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET,
2292                                     &cmd, 0);
2293         ss->rx_small.lanai = (struct mcp_kreq_ether_recv __iomem *)
2294             (mgp->sram + cmd.data0);
2295
2296         cmd.data0 = slice;
2297         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0);
2298         ss->rx_big.lanai = (struct mcp_kreq_ether_recv __iomem *)
2299             (mgp->sram + cmd.data0);
2300
2301         ss->tx.send_go = (__iomem __be32 *)
2302             (mgp->sram + MXGEFW_ETH_SEND_GO + 64 * slice);
2303         ss->tx.send_stop = (__iomem __be32 *)
2304             (mgp->sram + MXGEFW_ETH_SEND_STOP + 64 * slice);
2305         return status;
2306
2307 }
2308
2309 static int myri10ge_set_stats(struct myri10ge_priv *mgp, int slice)
2310 {
2311         struct myri10ge_cmd cmd;
2312         struct myri10ge_slice_state *ss;
2313         int status;
2314
2315         ss = &mgp->ss[slice];
2316         cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->fw_stats_bus);
2317         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->fw_stats_bus);
2318         cmd.data2 = sizeof(struct mcp_irq_data) | (slice << 16);
2319         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0);
2320         if (status == -ENOSYS) {
2321                 dma_addr_t bus = ss->fw_stats_bus;
2322                 if (slice != 0)
2323                         return -EINVAL;
2324                 bus += offsetof(struct mcp_irq_data, send_done_count);
2325                 cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus);
2326                 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus);
2327                 status = myri10ge_send_cmd(mgp,
2328                                            MXGEFW_CMD_SET_STATS_DMA_OBSOLETE,
2329                                            &cmd, 0);
2330                 /* Firmware cannot support multicast without STATS_DMA_V2 */
2331                 mgp->fw_multicast_support = 0;
2332         } else {
2333                 mgp->fw_multicast_support = 1;
2334         }
2335         return 0;
2336 }
2337
2338 static int myri10ge_open(struct net_device *dev)
2339 {
2340         struct myri10ge_slice_state *ss;
2341         struct myri10ge_priv *mgp = netdev_priv(dev);
2342         struct myri10ge_cmd cmd;
2343         int i, status, big_pow2, slice;
2344         u8 *itable;
2345         struct net_lro_mgr *lro_mgr;
2346
2347         if (mgp->running != MYRI10GE_ETH_STOPPED)
2348                 return -EBUSY;
2349
2350         mgp->running = MYRI10GE_ETH_STARTING;
2351         status = myri10ge_reset(mgp);
2352         if (status != 0) {
2353                 netdev_err(dev, "failed reset\n");
2354                 goto abort_with_nothing;
2355         }
2356
2357         if (mgp->num_slices > 1) {
2358                 cmd.data0 = mgp->num_slices;
2359                 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
2360                 if (mgp->dev->real_num_tx_queues > 1)
2361                         cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
2362                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
2363                                            &cmd, 0);
2364                 if (status != 0) {
2365                         netdev_err(dev, "failed to set number of slices\n");
2366                         goto abort_with_nothing;
2367                 }
2368                 /* setup the indirection table */
2369                 cmd.data0 = mgp->num_slices;
2370                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_TABLE_SIZE,
2371                                            &cmd, 0);
2372
2373                 status |= myri10ge_send_cmd(mgp,
2374                                             MXGEFW_CMD_GET_RSS_TABLE_OFFSET,
2375                                             &cmd, 0);
2376                 if (status != 0) {
2377                         netdev_err(dev, "failed to setup rss tables\n");
2378                         goto abort_with_nothing;
2379                 }
2380
2381                 /* just enable an identity mapping */
2382                 itable = mgp->sram + cmd.data0;
2383                 for (i = 0; i < mgp->num_slices; i++)
2384                         __raw_writeb(i, &itable[i]);
2385
2386                 cmd.data0 = 1;
2387                 cmd.data1 = myri10ge_rss_hash;
2388                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_ENABLE,
2389                                            &cmd, 0);
2390                 if (status != 0) {
2391                         netdev_err(dev, "failed to enable slices\n");
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                         netdev_err(dev, "failed to get ring sizes or locations\n");
2440                         goto abort_with_rings;
2441                 }
2442                 status = myri10ge_allocate_rings(ss);
2443                 if (status != 0)
2444                         goto abort_with_rings;
2445
2446                 /* only firmware which supports multiple TX queues
2447                  * supports setting up the tx stats on non-zero
2448                  * slices */
2449                 if (slice == 0 || mgp->dev->real_num_tx_queues > 1)
2450                         status = myri10ge_set_stats(mgp, slice);
2451                 if (status) {
2452                         netdev_err(dev, "Couldn't set stats DMA\n");
2453                         goto abort_with_rings;
2454                 }
2455
2456                 lro_mgr = &ss->rx_done.lro_mgr;
2457                 lro_mgr->dev = dev;
2458                 lro_mgr->features = LRO_F_NAPI;
2459                 lro_mgr->ip_summed = CHECKSUM_COMPLETE;
2460                 lro_mgr->ip_summed_aggr = CHECKSUM_UNNECESSARY;
2461                 lro_mgr->max_desc = MYRI10GE_MAX_LRO_DESCRIPTORS;
2462                 lro_mgr->lro_arr = ss->rx_done.lro_desc;
2463                 lro_mgr->get_frag_header = myri10ge_get_frag_header;
2464                 lro_mgr->max_aggr = myri10ge_lro_max_pkts;
2465                 lro_mgr->frag_align_pad = 2;
2466                 if (lro_mgr->max_aggr > MAX_SKB_FRAGS)
2467                         lro_mgr->max_aggr = MAX_SKB_FRAGS;
2468
2469                 /* must happen prior to any irq */
2470                 napi_enable(&(ss)->napi);
2471         }
2472
2473         /* now give firmware buffers sizes, and MTU */
2474         cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
2475         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0);
2476         cmd.data0 = mgp->small_bytes;
2477         status |=
2478             myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0);
2479         cmd.data0 = big_pow2;
2480         status |=
2481             myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0);
2482         if (status) {
2483                 netdev_err(dev, "Couldn't set buffer sizes\n");
2484                 goto abort_with_rings;
2485         }
2486
2487         /*
2488          * Set Linux style TSO mode; this is needed only on newer
2489          *  firmware versions.  Older versions default to Linux
2490          *  style TSO
2491          */
2492         cmd.data0 = 0;
2493         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_TSO_MODE, &cmd, 0);
2494         if (status && status != -ENOSYS) {
2495                 netdev_err(dev, "Couldn't set TSO mode\n");
2496                 goto abort_with_rings;
2497         }
2498
2499         mgp->link_state = ~0U;
2500         mgp->rdma_tags_available = 15;
2501
2502         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0);
2503         if (status) {
2504                 netdev_err(dev, "Couldn't bring up link\n");
2505                 goto abort_with_rings;
2506         }
2507
2508         mgp->running = MYRI10GE_ETH_RUNNING;
2509         mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ;
2510         add_timer(&mgp->watchdog_timer);
2511         netif_tx_wake_all_queues(dev);
2512
2513         return 0;
2514
2515 abort_with_rings:
2516         while (slice) {
2517                 slice--;
2518                 napi_disable(&mgp->ss[slice].napi);
2519         }
2520         for (i = 0; i < mgp->num_slices; i++)
2521                 myri10ge_free_rings(&mgp->ss[i]);
2522
2523         myri10ge_free_irq(mgp);
2524
2525 abort_with_nothing:
2526         mgp->running = MYRI10GE_ETH_STOPPED;
2527         return -ENOMEM;
2528 }
2529
2530 static int myri10ge_close(struct net_device *dev)
2531 {
2532         struct myri10ge_priv *mgp = netdev_priv(dev);
2533         struct myri10ge_cmd cmd;
2534         int status, old_down_cnt;
2535         int i;
2536
2537         if (mgp->running != MYRI10GE_ETH_RUNNING)
2538                 return 0;
2539
2540         if (mgp->ss[0].tx.req_bytes == NULL)
2541                 return 0;
2542
2543         del_timer_sync(&mgp->watchdog_timer);
2544         mgp->running = MYRI10GE_ETH_STOPPING;
2545         for (i = 0; i < mgp->num_slices; i++) {
2546                 napi_disable(&mgp->ss[i].napi);
2547         }
2548         netif_carrier_off(dev);
2549
2550         netif_tx_stop_all_queues(dev);
2551         if (mgp->rebooted == 0) {
2552                 old_down_cnt = mgp->down_cnt;
2553                 mb();
2554                 status =
2555                     myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0);
2556                 if (status)
2557                         netdev_err(dev, "Couldn't bring down link\n");
2558
2559                 wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt,
2560                                    HZ);
2561                 if (old_down_cnt == mgp->down_cnt)
2562                         netdev_err(dev, "never got down irq\n");
2563         }
2564         netif_tx_disable(dev);
2565         myri10ge_free_irq(mgp);
2566         for (i = 0; i < mgp->num_slices; i++)
2567                 myri10ge_free_rings(&mgp->ss[i]);
2568
2569         mgp->running = MYRI10GE_ETH_STOPPED;
2570         return 0;
2571 }
2572
2573 /* copy an array of struct mcp_kreq_ether_send's to the mcp.  Copy
2574  * backwards one at a time and handle ring wraps */
2575
2576 static inline void
2577 myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx,
2578                               struct mcp_kreq_ether_send *src, int cnt)
2579 {
2580         int idx, starting_slot;
2581         starting_slot = tx->req;
2582         while (cnt > 1) {
2583                 cnt--;
2584                 idx = (starting_slot + cnt) & tx->mask;
2585                 myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src));
2586                 mb();
2587         }
2588 }
2589
2590 /*
2591  * copy an array of struct mcp_kreq_ether_send's to the mcp.  Copy
2592  * at most 32 bytes at a time, so as to avoid involving the software
2593  * pio handler in the nic.   We re-write the first segment's flags
2594  * to mark them valid only after writing the entire chain.
2595  */
2596
2597 static inline void
2598 myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src,
2599                     int cnt)
2600 {
2601         int idx, i;
2602         struct mcp_kreq_ether_send __iomem *dstp, *dst;
2603         struct mcp_kreq_ether_send *srcp;
2604         u8 last_flags;
2605
2606         idx = tx->req & tx->mask;
2607
2608         last_flags = src->flags;
2609         src->flags = 0;
2610         mb();
2611         dst = dstp = &tx->lanai[idx];
2612         srcp = src;
2613
2614         if ((idx + cnt) < tx->mask) {
2615                 for (i = 0; i < (cnt - 1); i += 2) {
2616                         myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src));
2617                         mb();   /* force write every 32 bytes */
2618                         srcp += 2;
2619                         dstp += 2;
2620                 }
2621         } else {
2622                 /* submit all but the first request, and ensure
2623                  * that it is submitted below */
2624                 myri10ge_submit_req_backwards(tx, src, cnt);
2625                 i = 0;
2626         }
2627         if (i < cnt) {
2628                 /* submit the first request */
2629                 myri10ge_pio_copy(dstp, srcp, sizeof(*src));
2630                 mb();           /* barrier before setting valid flag */
2631         }
2632
2633         /* re-write the last 32-bits with the valid flags */
2634         src->flags = last_flags;
2635         put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3);
2636         tx->req += cnt;
2637         mb();
2638 }
2639
2640 /*
2641  * Transmit a packet.  We need to split the packet so that a single
2642  * segment does not cross myri10ge->tx_boundary, so this makes segment
2643  * counting tricky.  So rather than try to count segments up front, we
2644  * just give up if there are too few segments to hold a reasonably
2645  * fragmented packet currently available.  If we run
2646  * out of segments while preparing a packet for DMA, we just linearize
2647  * it and try again.
2648  */
2649
2650 static netdev_tx_t myri10ge_xmit(struct sk_buff *skb,
2651                                        struct net_device *dev)
2652 {
2653         struct myri10ge_priv *mgp = netdev_priv(dev);
2654         struct myri10ge_slice_state *ss;
2655         struct mcp_kreq_ether_send *req;
2656         struct myri10ge_tx_buf *tx;
2657         struct skb_frag_struct *frag;
2658         struct netdev_queue *netdev_queue;
2659         dma_addr_t bus;
2660         u32 low;
2661         __be32 high_swapped;
2662         unsigned int len;
2663         int idx, last_idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
2664         u16 pseudo_hdr_offset, cksum_offset, queue;
2665         int cum_len, seglen, boundary, rdma_count;
2666         u8 flags, odd_flag;
2667
2668         queue = skb_get_queue_mapping(skb);
2669         ss = &mgp->ss[queue];
2670         netdev_queue = netdev_get_tx_queue(mgp->dev, queue);
2671         tx = &ss->tx;
2672
2673 again:
2674         req = tx->req_list;
2675         avail = tx->mask - 1 - (tx->req - tx->done);
2676
2677         mss = 0;
2678         max_segments = MXGEFW_MAX_SEND_DESC;
2679
2680         if (skb_is_gso(skb)) {
2681                 mss = skb_shinfo(skb)->gso_size;
2682                 max_segments = MYRI10GE_MAX_SEND_DESC_TSO;
2683         }
2684
2685         if ((unlikely(avail < max_segments))) {
2686                 /* we are out of transmit resources */
2687                 tx->stop_queue++;
2688                 netif_tx_stop_queue(netdev_queue);
2689                 return NETDEV_TX_BUSY;
2690         }
2691
2692         /* Setup checksum offloading, if needed */
2693         cksum_offset = 0;
2694         pseudo_hdr_offset = 0;
2695         odd_flag = 0;
2696         flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
2697         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2698                 cksum_offset = skb_transport_offset(skb);
2699                 pseudo_hdr_offset = cksum_offset + skb->csum_offset;
2700                 /* If the headers are excessively large, then we must
2701                  * fall back to a software checksum */
2702                 if (unlikely(!mss && (cksum_offset > 255 ||
2703                                       pseudo_hdr_offset > 127))) {
2704                         if (skb_checksum_help(skb))
2705                                 goto drop;
2706                         cksum_offset = 0;
2707                         pseudo_hdr_offset = 0;
2708                 } else {
2709                         odd_flag = MXGEFW_FLAGS_ALIGN_ODD;
2710                         flags |= MXGEFW_FLAGS_CKSUM;
2711                 }
2712         }
2713
2714         cum_len = 0;
2715
2716         if (mss) {              /* TSO */
2717                 /* this removes any CKSUM flag from before */
2718                 flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST);
2719
2720                 /* negative cum_len signifies to the
2721                  * send loop that we are still in the
2722                  * header portion of the TSO packet.
2723                  * TSO header can be at most 1KB long */
2724                 cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb));
2725
2726                 /* for IPv6 TSO, the checksum offset stores the
2727                  * TCP header length, to save the firmware from
2728                  * the need to parse the headers */
2729                 if (skb_is_gso_v6(skb)) {
2730                         cksum_offset = tcp_hdrlen(skb);
2731                         /* Can only handle headers <= max_tso6 long */
2732                         if (unlikely(-cum_len > mgp->max_tso6))
2733                                 return myri10ge_sw_tso(skb, dev);
2734                 }
2735                 /* for TSO, pseudo_hdr_offset holds mss.
2736                  * The firmware figures out where to put
2737                  * the checksum by parsing the header. */
2738                 pseudo_hdr_offset = mss;
2739         } else
2740                 /* Mark small packets, and pad out tiny packets */
2741         if (skb->len <= MXGEFW_SEND_SMALL_SIZE) {
2742                 flags |= MXGEFW_FLAGS_SMALL;
2743
2744                 /* pad frames to at least ETH_ZLEN bytes */
2745                 if (unlikely(skb->len < ETH_ZLEN)) {
2746                         if (skb_padto(skb, ETH_ZLEN)) {
2747                                 /* The packet is gone, so we must
2748                                  * return 0 */
2749                                 ss->stats.tx_dropped += 1;
2750                                 return NETDEV_TX_OK;
2751                         }
2752                         /* adjust the len to account for the zero pad
2753                          * so that the nic can know how long it is */
2754                         skb->len = ETH_ZLEN;
2755                 }
2756         }
2757
2758         /* map the skb for DMA */
2759         len = skb->len - skb->data_len;
2760         idx = tx->req & tx->mask;
2761         tx->info[idx].skb = skb;
2762         bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE);
2763         pci_unmap_addr_set(&tx->info[idx], bus, bus);
2764         pci_unmap_len_set(&tx->info[idx], len, len);
2765
2766         frag_cnt = skb_shinfo(skb)->nr_frags;
2767         frag_idx = 0;
2768         count = 0;
2769         rdma_count = 0;
2770
2771         /* "rdma_count" is the number of RDMAs belonging to the
2772          * current packet BEFORE the current send request. For
2773          * non-TSO packets, this is equal to "count".
2774          * For TSO packets, rdma_count needs to be reset
2775          * to 0 after a segment cut.
2776          *
2777          * The rdma_count field of the send request is
2778          * the number of RDMAs of the packet starting at
2779          * that request. For TSO send requests with one ore more cuts
2780          * in the middle, this is the number of RDMAs starting
2781          * after the last cut in the request. All previous
2782          * segments before the last cut implicitly have 1 RDMA.
2783          *
2784          * Since the number of RDMAs is not known beforehand,
2785          * it must be filled-in retroactively - after each
2786          * segmentation cut or at the end of the entire packet.
2787          */
2788
2789         while (1) {
2790                 /* Break the SKB or Fragment up into pieces which
2791                  * do not cross mgp->tx_boundary */
2792                 low = MYRI10GE_LOWPART_TO_U32(bus);
2793                 high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
2794                 while (len) {
2795                         u8 flags_next;
2796                         int cum_len_next;
2797
2798                         if (unlikely(count == max_segments))
2799                                 goto abort_linearize;
2800
2801                         boundary =
2802                             (low + mgp->tx_boundary) & ~(mgp->tx_boundary - 1);
2803                         seglen = boundary - low;
2804                         if (seglen > len)
2805                                 seglen = len;
2806                         flags_next = flags & ~MXGEFW_FLAGS_FIRST;
2807                         cum_len_next = cum_len + seglen;
2808                         if (mss) {      /* TSO */
2809                                 (req - rdma_count)->rdma_count = rdma_count + 1;
2810
2811                                 if (likely(cum_len >= 0)) {     /* payload */
2812                                         int next_is_first, chop;
2813
2814                                         chop = (cum_len_next > mss);
2815                                         cum_len_next = cum_len_next % mss;
2816                                         next_is_first = (cum_len_next == 0);
2817                                         flags |= chop * MXGEFW_FLAGS_TSO_CHOP;
2818                                         flags_next |= next_is_first *
2819                                             MXGEFW_FLAGS_FIRST;
2820                                         rdma_count |= -(chop | next_is_first);
2821                                         rdma_count += chop & !next_is_first;
2822                                 } else if (likely(cum_len_next >= 0)) { /* header ends */
2823                                         int small;
2824
2825                                         rdma_count = -1;
2826                                         cum_len_next = 0;
2827                                         seglen = -cum_len;
2828                                         small = (mss <= MXGEFW_SEND_SMALL_SIZE);
2829                                         flags_next = MXGEFW_FLAGS_TSO_PLD |
2830                                             MXGEFW_FLAGS_FIRST |
2831                                             (small * MXGEFW_FLAGS_SMALL);
2832                                 }
2833                         }
2834                         req->addr_high = high_swapped;
2835                         req->addr_low = htonl(low);
2836                         req->pseudo_hdr_offset = htons(pseudo_hdr_offset);
2837                         req->pad = 0;   /* complete solid 16-byte block; does this matter? */
2838                         req->rdma_count = 1;
2839                         req->length = htons(seglen);
2840                         req->cksum_offset = cksum_offset;
2841                         req->flags = flags | ((cum_len & 1) * odd_flag);
2842
2843                         low += seglen;
2844                         len -= seglen;
2845                         cum_len = cum_len_next;
2846                         flags = flags_next;
2847                         req++;
2848                         count++;
2849                         rdma_count++;
2850                         if (cksum_offset != 0 && !(mss && skb_is_gso_v6(skb))) {
2851                                 if (unlikely(cksum_offset > seglen))
2852                                         cksum_offset -= seglen;
2853                                 else
2854                                         cksum_offset = 0;
2855                         }
2856                 }
2857                 if (frag_idx == frag_cnt)
2858                         break;
2859
2860                 /* map next fragment for DMA */
2861                 idx = (count + tx->req) & tx->mask;
2862                 frag = &skb_shinfo(skb)->frags[frag_idx];
2863                 frag_idx++;
2864                 len = frag->size;
2865                 bus = pci_map_page(mgp->pdev, frag->page, frag->page_offset,
2866                                    len, PCI_DMA_TODEVICE);
2867                 pci_unmap_addr_set(&tx->info[idx], bus, bus);
2868                 pci_unmap_len_set(&tx->info[idx], len, len);
2869         }
2870
2871         (req - rdma_count)->rdma_count = rdma_count;
2872         if (mss)
2873                 do {
2874                         req--;
2875                         req->flags |= MXGEFW_FLAGS_TSO_LAST;
2876                 } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP |
2877                                          MXGEFW_FLAGS_FIRST)));
2878         idx = ((count - 1) + tx->req) & tx->mask;
2879         tx->info[idx].last = 1;
2880         myri10ge_submit_req(tx, tx->req_list, count);
2881         /* if using multiple tx queues, make sure NIC polls the
2882          * current slice */
2883         if ((mgp->dev->real_num_tx_queues > 1) && tx->queue_active == 0) {
2884                 tx->queue_active = 1;
2885                 put_be32(htonl(1), tx->send_go);
2886                 mb();
2887                 mmiowb();
2888         }
2889         tx->pkt_start++;
2890         if ((avail - count) < MXGEFW_MAX_SEND_DESC) {
2891                 tx->stop_queue++;
2892                 netif_tx_stop_queue(netdev_queue);
2893         }
2894         return NETDEV_TX_OK;
2895
2896 abort_linearize:
2897         /* Free any DMA resources we've alloced and clear out the skb
2898          * slot so as to not trip up assertions, and to avoid a
2899          * double-free if linearizing fails */
2900
2901         last_idx = (idx + 1) & tx->mask;
2902         idx = tx->req & tx->mask;
2903         tx->info[idx].skb = NULL;
2904         do {
2905                 len = pci_unmap_len(&tx->info[idx], len);
2906                 if (len) {
2907                         if (tx->info[idx].skb != NULL)
2908                                 pci_unmap_single(mgp->pdev,
2909                                                  pci_unmap_addr(&tx->info[idx],
2910                                                                 bus), len,
2911                                                  PCI_DMA_TODEVICE);
2912                         else
2913                                 pci_unmap_page(mgp->pdev,
2914                                                pci_unmap_addr(&tx->info[idx],
2915                                                               bus), len,
2916                                                PCI_DMA_TODEVICE);
2917                         pci_unmap_len_set(&tx->info[idx], len, 0);
2918                         tx->info[idx].skb = NULL;
2919                 }
2920                 idx = (idx + 1) & tx->mask;
2921         } while (idx != last_idx);
2922         if (skb_is_gso(skb)) {
2923                 netdev_err(mgp->dev, "TSO but wanted to linearize?!?!?\n");
2924                 goto drop;
2925         }
2926
2927         if (skb_linearize(skb))
2928                 goto drop;
2929
2930         tx->linearized++;
2931         goto again;
2932
2933 drop:
2934         dev_kfree_skb_any(skb);
2935         ss->stats.tx_dropped += 1;
2936         return NETDEV_TX_OK;
2937
2938 }
2939
2940 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
2941                                          struct net_device *dev)
2942 {
2943         struct sk_buff *segs, *curr;
2944         struct myri10ge_priv *mgp = netdev_priv(dev);
2945         struct myri10ge_slice_state *ss;
2946         netdev_tx_t status;
2947
2948         segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO6);
2949         if (IS_ERR(segs))
2950                 goto drop;
2951
2952         while (segs) {
2953                 curr = segs;
2954                 segs = segs->next;
2955                 curr->next = NULL;
2956                 status = myri10ge_xmit(curr, dev);
2957                 if (status != 0) {
2958                         dev_kfree_skb_any(curr);
2959                         if (segs != NULL) {
2960                                 curr = segs;
2961                                 segs = segs->next;
2962                                 curr->next = NULL;
2963                                 dev_kfree_skb_any(segs);
2964                         }
2965                         goto drop;
2966                 }
2967         }
2968         dev_kfree_skb_any(skb);
2969         return NETDEV_TX_OK;
2970
2971 drop:
2972         ss = &mgp->ss[skb_get_queue_mapping(skb)];
2973         dev_kfree_skb_any(skb);
2974         ss->stats.tx_dropped += 1;
2975         return NETDEV_TX_OK;
2976 }
2977
2978 static struct net_device_stats *myri10ge_get_stats(struct net_device *dev)
2979 {
2980         struct myri10ge_priv *mgp = netdev_priv(dev);
2981         struct myri10ge_slice_netstats *slice_stats;
2982         struct net_device_stats *stats = &dev->stats;
2983         int i;
2984
2985         spin_lock(&mgp->stats_lock);
2986         memset(stats, 0, sizeof(*stats));
2987         for (i = 0; i < mgp->num_slices; i++) {
2988                 slice_stats = &mgp->ss[i].stats;
2989                 stats->rx_packets += slice_stats->rx_packets;
2990                 stats->tx_packets += slice_stats->tx_packets;
2991                 stats->rx_bytes += slice_stats->rx_bytes;
2992                 stats->tx_bytes += slice_stats->tx_bytes;
2993                 stats->rx_dropped += slice_stats->rx_dropped;
2994                 stats->tx_dropped += slice_stats->tx_dropped;
2995         }
2996         spin_unlock(&mgp->stats_lock);
2997         return stats;
2998 }
2999
3000 static void myri10ge_set_multicast_list(struct net_device *dev)
3001 {
3002         struct myri10ge_priv *mgp = netdev_priv(dev);
3003         struct myri10ge_cmd cmd;
3004         struct dev_mc_list *mc_list;
3005         __be32 data[2] = { 0, 0 };
3006         int err;
3007
3008         /* can be called from atomic contexts,
3009          * pass 1 to force atomicity in myri10ge_send_cmd() */
3010         myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1);
3011
3012         /* This firmware is known to not support multicast */
3013         if (!mgp->fw_multicast_support)
3014                 return;
3015
3016         /* Disable multicast filtering */
3017
3018         err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1);
3019         if (err != 0) {
3020                 netdev_err(dev, "Failed MXGEFW_ENABLE_ALLMULTI, error status: %d\n",
3021                            err);
3022                 goto abort;
3023         }
3024
3025         if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) {
3026                 /* request to disable multicast filtering, so quit here */
3027                 return;
3028         }
3029
3030         /* Flush the filters */
3031
3032         err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS,
3033                                 &cmd, 1);
3034         if (err != 0) {
3035                 netdev_err(dev, "Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS, error status: %d\n",
3036                            err);
3037                 goto abort;
3038         }
3039
3040         /* Walk the multicast list, and add each address */
3041         netdev_for_each_mc_addr(mc_list, dev) {
3042                 memcpy(data, &mc_list->dmi_addr, 6);
3043                 cmd.data0 = ntohl(data[0]);
3044                 cmd.data1 = ntohl(data[1]);
3045                 err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP,
3046                                         &cmd, 1);
3047
3048                 if (err != 0) {
3049                         netdev_err(dev, "Failed MXGEFW_JOIN_MULTICAST_GROUP, error status:%d %pM\n",
3050                                    err, mc_list->dmi_addr);
3051                         goto abort;
3052                 }
3053         }
3054         /* Enable multicast filtering */
3055         err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1);
3056         if (err != 0) {
3057                 netdev_err(dev, "Failed MXGEFW_DISABLE_ALLMULTI, error status: %d\n",
3058                            err);
3059                 goto abort;
3060         }
3061
3062         return;
3063
3064 abort:
3065         return;
3066 }
3067
3068 static int myri10ge_set_mac_address(struct net_device *dev, void *addr)
3069 {
3070         struct sockaddr *sa = addr;
3071         struct myri10ge_priv *mgp = netdev_priv(dev);
3072         int status;
3073
3074         if (!is_valid_ether_addr(sa->sa_data))
3075                 return -EADDRNOTAVAIL;
3076
3077         status = myri10ge_update_mac_address(mgp, sa->sa_data);
3078         if (status != 0) {
3079                 netdev_err(dev, "changing mac address failed with %d\n",
3080                            status);
3081                 return status;
3082         }
3083
3084         /* change the dev structure */
3085         memcpy(dev->dev_addr, sa->sa_data, 6);
3086         return 0;
3087 }
3088
3089 static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
3090 {
3091         struct myri10ge_priv *mgp = netdev_priv(dev);
3092         int error = 0;
3093
3094         if ((new_mtu < 68) || (ETH_HLEN + new_mtu > MYRI10GE_MAX_ETHER_MTU)) {
3095                 netdev_err(dev, "new mtu (%d) is not valid\n", new_mtu);
3096                 return -EINVAL;
3097         }
3098         netdev_info(dev, "changing mtu from %d to %d\n", dev->mtu, new_mtu);
3099         if (mgp->running) {
3100                 /* if we change the mtu on an active device, we must
3101                  * reset the device so the firmware sees the change */
3102                 myri10ge_close(dev);
3103                 dev->mtu = new_mtu;
3104                 myri10ge_open(dev);
3105         } else
3106                 dev->mtu = new_mtu;
3107
3108         return error;
3109 }
3110
3111 /*
3112  * Enable ECRC to align PCI-E Completion packets on an 8-byte boundary.
3113  * Only do it if the bridge is a root port since we don't want to disturb
3114  * any other device, except if forced with myri10ge_ecrc_enable > 1.
3115  */
3116
3117 static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
3118 {
3119         struct pci_dev *bridge = mgp->pdev->bus->self;
3120         struct device *dev = &mgp->pdev->dev;
3121         unsigned cap;
3122         unsigned err_cap;
3123         u16 val;
3124         u8 ext_type;
3125         int ret;
3126
3127         if (!myri10ge_ecrc_enable || !bridge)
3128                 return;
3129
3130         /* check that the bridge is a root port */
3131         cap = pci_find_capability(bridge, PCI_CAP_ID_EXP);
3132         pci_read_config_word(bridge, cap + PCI_CAP_FLAGS, &val);
3133         ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
3134         if (ext_type != PCI_EXP_TYPE_ROOT_PORT) {
3135                 if (myri10ge_ecrc_enable > 1) {
3136                         struct pci_dev *prev_bridge, *old_bridge = bridge;
3137
3138                         /* Walk the hierarchy up to the root port
3139                          * where ECRC has to be enabled */
3140                         do {
3141                                 prev_bridge = bridge;
3142                                 bridge = bridge->bus->self;
3143                                 if (!bridge || prev_bridge == bridge) {
3144                                         dev_err(dev,
3145                                                 "Failed to find root port"
3146                                                 " to force ECRC\n");
3147                                         return;
3148                                 }
3149                                 cap =
3150                                     pci_find_capability(bridge, PCI_CAP_ID_EXP);
3151                                 pci_read_config_word(bridge,
3152                                                      cap + PCI_CAP_FLAGS, &val);
3153                                 ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
3154                         } while (ext_type != PCI_EXP_TYPE_ROOT_PORT);
3155
3156                         dev_info(dev,
3157                                  "Forcing ECRC on non-root port %s"
3158                                  " (enabling on root port %s)\n",
3159                                  pci_name(old_bridge), pci_name(bridge));
3160                 } else {
3161                         dev_err(dev,
3162                                 "Not enabling ECRC on non-root port %s\n",
3163                                 pci_name(bridge));
3164                         return;
3165                 }
3166         }
3167
3168         cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
3169         if (!cap)
3170                 return;
3171
3172         ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap);
3173         if (ret) {
3174                 dev_err(dev, "failed reading ext-conf-space of %s\n",
3175                         pci_name(bridge));
3176                 dev_err(dev, "\t pci=nommconf in use? "
3177                         "or buggy/incomplete/absent ACPI MCFG attr?\n");
3178                 return;
3179         }
3180         if (!(err_cap & PCI_ERR_CAP_ECRC_GENC))
3181                 return;
3182
3183         err_cap |= PCI_ERR_CAP_ECRC_GENE;
3184         pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap);
3185         dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge));
3186 }
3187
3188 /*
3189  * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput
3190  * when the PCI-E Completion packets are aligned on an 8-byte
3191  * boundary.  Some PCI-E chip sets always align Completion packets; on
3192  * the ones that do not, the alignment can be enforced by enabling
3193  * ECRC generation (if supported).
3194  *
3195  * When PCI-E Completion packets are not aligned, it is actually more
3196  * efficient to limit Read-DMA transactions to 2KB, rather than 4KB.
3197  *
3198  * If the driver can neither enable ECRC nor verify that it has
3199  * already been enabled, then it must use a firmware image which works
3200  * around unaligned completion packets (myri10ge_rss_ethp_z8e.dat), and it
3201  * should also ensure that it never gives the device a Read-DMA which is
3202  * larger than 2KB by setting the tx_boundary to 2KB.  If ECRC is
3203  * enabled, then the driver should use the aligned (myri10ge_rss_eth_z8e.dat)
3204  * firmware image, and set tx_boundary to 4KB.
3205  */
3206
3207 static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
3208 {
3209         struct pci_dev *pdev = mgp->pdev;
3210         struct device *dev = &pdev->dev;
3211         int status;
3212
3213         mgp->tx_boundary = 4096;
3214         /*
3215          * Verify the max read request size was set to 4KB
3216          * before trying the test with 4KB.
3217          */
3218         status = pcie_get_readrq(pdev);
3219         if (status < 0) {
3220                 dev_err(dev, "Couldn't read max read req size: %d\n", status);
3221                 goto abort;
3222         }
3223         if (status != 4096) {
3224                 dev_warn(dev, "Max Read Request size != 4096 (%d)\n", status);
3225                 mgp->tx_boundary = 2048;
3226         }
3227         /*
3228          * load the optimized firmware (which assumes aligned PCIe
3229          * completions) in order to see if it works on this host.
3230          */
3231         mgp->fw_name = myri10ge_fw_aligned;
3232         status = myri10ge_load_firmware(mgp, 1);
3233         if (status != 0) {
3234                 goto abort;
3235         }
3236
3237         /*
3238          * Enable ECRC if possible
3239          */
3240         myri10ge_enable_ecrc(mgp);
3241
3242         /*
3243          * Run a DMA test which watches for unaligned completions and
3244          * aborts on the first one seen.
3245          */
3246
3247         status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST);
3248         if (status == 0)
3249                 return;         /* keep the aligned firmware */
3250
3251         if (status != -E2BIG)
3252                 dev_warn(dev, "DMA test failed: %d\n", status);
3253         if (status == -ENOSYS)
3254                 dev_warn(dev, "Falling back to ethp! "
3255                          "Please install up to date fw\n");
3256 abort:
3257         /* fall back to using the unaligned firmware */
3258         mgp->tx_boundary = 2048;
3259         mgp->fw_name = myri10ge_fw_unaligned;
3260
3261 }
3262
3263 static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
3264 {
3265         int overridden = 0;
3266
3267         if (myri10ge_force_firmware == 0) {
3268                 int link_width, exp_cap;
3269                 u16 lnk;
3270
3271                 exp_cap = pci_find_capability(mgp->pdev, PCI_CAP_ID_EXP);
3272                 pci_read_config_word(mgp->pdev, exp_cap + PCI_EXP_LNKSTA, &lnk);
3273                 link_width = (lnk >> 4) & 0x3f;
3274
3275                 /* Check to see if Link is less than 8 or if the
3276                  * upstream bridge is known to provide aligned
3277                  * completions */
3278                 if (link_width < 8) {
3279                         dev_info(&mgp->pdev->dev, "PCIE x%d Link\n",
3280                                  link_width);
3281                         mgp->tx_boundary = 4096;
3282                         mgp->fw_name = myri10ge_fw_aligned;
3283                 } else {
3284                         myri10ge_firmware_probe(mgp);
3285                 }
3286         } else {
3287                 if (myri10ge_force_firmware == 1) {
3288                         dev_info(&mgp->pdev->dev,
3289                                  "Assuming aligned completions (forced)\n");
3290                         mgp->tx_boundary = 4096;
3291                         mgp->fw_name = myri10ge_fw_aligned;
3292                 } else {
3293                         dev_info(&mgp->pdev->dev,
3294                                  "Assuming unaligned completions (forced)\n");
3295                         mgp->tx_boundary = 2048;
3296                         mgp->fw_name = myri10ge_fw_unaligned;
3297                 }
3298         }
3299         if (myri10ge_fw_name != NULL) {
3300                 overridden = 1;
3301                 mgp->fw_name = myri10ge_fw_name;
3302         }
3303         if (mgp->board_number < MYRI10GE_MAX_BOARDS &&
3304             myri10ge_fw_names[mgp->board_number] != NULL &&
3305             strlen(myri10ge_fw_names[mgp->board_number])) {
3306                 mgp->fw_name = myri10ge_fw_names[mgp->board_number];
3307                 overridden = 1;
3308         }
3309         if (overridden)
3310                 dev_info(&mgp->pdev->dev, "overriding firmware to %s\n",
3311                          mgp->fw_name);
3312 }
3313
3314 #ifdef CONFIG_PM
3315 static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state)
3316 {
3317         struct myri10ge_priv *mgp;
3318         struct net_device *netdev;
3319
3320         mgp = pci_get_drvdata(pdev);
3321         if (mgp == NULL)
3322                 return -EINVAL;
3323         netdev = mgp->dev;
3324
3325         netif_device_detach(netdev);
3326         if (netif_running(netdev)) {
3327                 netdev_info(netdev, "closing\n");
3328                 rtnl_lock();
3329                 myri10ge_close(netdev);
3330                 rtnl_unlock();
3331         }
3332         myri10ge_dummy_rdma(mgp, 0);
3333         pci_save_state(pdev);
3334         pci_disable_device(pdev);
3335
3336         return pci_set_power_state(pdev, pci_choose_state(pdev, state));
3337 }
3338
3339 static int myri10ge_resume(struct pci_dev *pdev)
3340 {
3341         struct myri10ge_priv *mgp;
3342         struct net_device *netdev;
3343         int status;
3344         u16 vendor;
3345
3346         mgp = pci_get_drvdata(pdev);
3347         if (mgp == NULL)
3348                 return -EINVAL;
3349         netdev = mgp->dev;
3350         pci_set_power_state(pdev, 0);   /* zeros conf space as a side effect */
3351         msleep(5);              /* give card time to respond */
3352         pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3353         if (vendor == 0xffff) {
3354                 netdev_err(mgp->dev, "device disappeared!\n");
3355                 return -EIO;
3356         }
3357
3358         status = pci_restore_state(pdev);
3359         if (status)
3360                 return status;
3361
3362         status = pci_enable_device(pdev);
3363         if (status) {
3364                 dev_err(&pdev->dev, "failed to enable device\n");
3365                 return status;
3366         }
3367
3368         pci_set_master(pdev);
3369
3370         myri10ge_reset(mgp);
3371         myri10ge_dummy_rdma(mgp, 1);
3372
3373         /* Save configuration space to be restored if the
3374          * nic resets due to a parity error */
3375         pci_save_state(pdev);
3376
3377         if (netif_running(netdev)) {
3378                 rtnl_lock();
3379                 status = myri10ge_open(netdev);
3380                 rtnl_unlock();
3381                 if (status != 0)
3382                         goto abort_with_enabled;
3383
3384         }
3385         netif_device_attach(netdev);
3386
3387         return 0;
3388
3389 abort_with_enabled:
3390         pci_disable_device(pdev);
3391         return -EIO;
3392
3393 }
3394 #endif                          /* CONFIG_PM */
3395
3396 static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp)
3397 {
3398         struct pci_dev *pdev = mgp->pdev;
3399         int vs = mgp->vendor_specific_offset;
3400         u32 reboot;
3401
3402         /*enter read32 mode */
3403         pci_write_config_byte(pdev, vs + 0x10, 0x3);
3404
3405         /*read REBOOT_STATUS (0xfffffff0) */
3406         pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0);
3407         pci_read_config_dword(pdev, vs + 0x14, &reboot);
3408         return reboot;
3409 }
3410
3411 /*
3412  * This watchdog is used to check whether the board has suffered
3413  * from a parity error and needs to be recovered.
3414  */
3415 static void myri10ge_watchdog(struct work_struct *work)
3416 {
3417         struct myri10ge_priv *mgp =
3418             container_of(work, struct myri10ge_priv, watchdog_work);
3419         struct myri10ge_tx_buf *tx;
3420         u32 reboot;
3421         int status, rebooted;
3422         int i;
3423         u16 cmd, vendor;
3424
3425         mgp->watchdog_resets++;
3426         pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3427         rebooted = 0;
3428         if ((cmd & PCI_COMMAND_MASTER) == 0) {
3429                 /* Bus master DMA disabled?  Check to see
3430                  * if the card rebooted due to a parity error
3431                  * For now, just report it */
3432                 reboot = myri10ge_read_reboot(mgp);
3433                 netdev_err(mgp->dev, "NIC rebooted (0x%x),%s resetting\n",
3434                            reboot,
3435                            myri10ge_reset_recover ? "" : " not");
3436                 if (myri10ge_reset_recover == 0)
3437                         return;
3438                 rtnl_lock();
3439                 mgp->rebooted = 1;
3440                 rebooted = 1;
3441                 myri10ge_close(mgp->dev);
3442                 myri10ge_reset_recover--;
3443                 mgp->rebooted = 0;
3444                 /*
3445                  * A rebooted nic will come back with config space as
3446                  * it was after power was applied to PCIe bus.
3447                  * Attempt to restore config space which was saved
3448                  * when the driver was loaded, or the last time the
3449                  * nic was resumed from power saving mode.
3450                  */
3451                 pci_restore_state(mgp->pdev);
3452
3453                 /* save state again for accounting reasons */
3454                 pci_save_state(mgp->pdev);
3455
3456         } else {
3457                 /* if we get back -1's from our slot, perhaps somebody
3458                  * powered off our card.  Don't try to reset it in
3459                  * this case */
3460                 if (cmd == 0xffff) {
3461                         pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3462                         if (vendor == 0xffff) {
3463                                 netdev_err(mgp->dev, "device disappeared!\n");
3464                                 return;
3465                         }
3466                 }
3467                 /* Perhaps it is a software error.  Try to reset */
3468
3469                 netdev_err(mgp->dev, "device timeout, resetting\n");
3470                 for (i = 0; i < mgp->num_slices; i++) {
3471                         tx = &mgp->ss[i].tx;
3472                         netdev_err(mgp->dev, "(%d): %d %d %d %d %d %d\n",
3473                                    i, tx->queue_active, tx->req,
3474                                    tx->done, tx->pkt_start, tx->pkt_done,
3475                                    (int)ntohl(mgp->ss[i].fw_stats->
3476                                               send_done_count));
3477                         msleep(2000);
3478                         netdev_info(mgp->dev, "(%d): %d %d %d %d %d %d\n",
3479                                     i, tx->queue_active, tx->req,
3480                                     tx->done, tx->pkt_start, tx->pkt_done,
3481                                     (int)ntohl(mgp->ss[i].fw_stats->
3482                                                send_done_count));
3483                 }
3484         }
3485
3486         if (!rebooted) {
3487                 rtnl_lock();
3488                 myri10ge_close(mgp->dev);
3489         }
3490         status = myri10ge_load_firmware(mgp, 1);
3491         if (status != 0)
3492                 netdev_err(mgp->dev, "failed to load firmware\n");
3493         else
3494                 myri10ge_open(mgp->dev);
3495         rtnl_unlock();
3496 }
3497
3498 /*
3499  * We use our own timer routine rather than relying upon
3500  * netdev->tx_timeout because we have a very large hardware transmit
3501  * queue.  Due to the large queue, the netdev->tx_timeout function
3502  * cannot detect a NIC with a parity error in a timely fashion if the
3503  * NIC is lightly loaded.
3504  */
3505 static void myri10ge_watchdog_timer(unsigned long arg)
3506 {
3507         struct myri10ge_priv *mgp;
3508         struct myri10ge_slice_state *ss;
3509         int i, reset_needed, busy_slice_cnt;
3510         u32 rx_pause_cnt;
3511         u16 cmd;
3512
3513         mgp = (struct myri10ge_priv *)arg;
3514
3515         rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3516         busy_slice_cnt = 0;
3517         for (i = 0, reset_needed = 0;
3518              i < mgp->num_slices && reset_needed == 0; ++i) {
3519
3520                 ss = &mgp->ss[i];
3521                 if (ss->rx_small.watchdog_needed) {
3522                         myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
3523                                                 mgp->small_bytes + MXGEFW_PAD,
3524                                                 1);
3525                         if (ss->rx_small.fill_cnt - ss->rx_small.cnt >=
3526                             myri10ge_fill_thresh)
3527                                 ss->rx_small.watchdog_needed = 0;
3528                 }
3529                 if (ss->rx_big.watchdog_needed) {
3530                         myri10ge_alloc_rx_pages(mgp, &ss->rx_big,
3531                                                 mgp->big_bytes, 1);
3532                         if (ss->rx_big.fill_cnt - ss->rx_big.cnt >=
3533                             myri10ge_fill_thresh)
3534                                 ss->rx_big.watchdog_needed = 0;
3535                 }
3536
3537                 if (ss->tx.req != ss->tx.done &&
3538                     ss->tx.done == ss->watchdog_tx_done &&
3539                     ss->watchdog_tx_req != ss->watchdog_tx_done) {
3540                         /* nic seems like it might be stuck.. */
3541                         if (rx_pause_cnt != mgp->watchdog_pause) {
3542                                 if (net_ratelimit())
3543                                         netdev_err(mgp->dev, "slice %d: TX paused, check link partner\n",
3544                                                    i);
3545                         } else {
3546                                 netdev_warn(mgp->dev, "slice %d stuck:", i);
3547                                 reset_needed = 1;
3548                         }
3549                 }
3550                 if (ss->watchdog_tx_done != ss->tx.done ||
3551                     ss->watchdog_rx_done != ss->rx_done.cnt) {
3552                         busy_slice_cnt++;
3553                 }
3554                 ss->watchdog_tx_done = ss->tx.done;
3555                 ss->watchdog_tx_req = ss->tx.req;
3556                 ss->watchdog_rx_done = ss->rx_done.cnt;
3557         }
3558         /* if we've sent or received no traffic, poll the NIC to
3559          * ensure it is still there.  Otherwise, we risk not noticing
3560          * an error in a timely fashion */
3561         if (busy_slice_cnt == 0) {
3562                 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3563                 if ((cmd & PCI_COMMAND_MASTER) == 0) {
3564                         reset_needed = 1;
3565                 }
3566         }
3567         mgp->watchdog_pause = rx_pause_cnt;
3568
3569         if (reset_needed) {
3570                 schedule_work(&mgp->watchdog_work);
3571         } else {
3572                 /* rearm timer */
3573                 mod_timer(&mgp->watchdog_timer,
3574                           jiffies + myri10ge_watchdog_timeout * HZ);
3575         }
3576 }
3577
3578 static void myri10ge_free_slices(struct myri10ge_priv *mgp)
3579 {
3580         struct myri10ge_slice_state *ss;
3581         struct pci_dev *pdev = mgp->pdev;
3582         size_t bytes;
3583         int i;
3584
3585         if (mgp->ss == NULL)
3586                 return;
3587
3588         for (i = 0; i < mgp->num_slices; i++) {
3589                 ss = &mgp->ss[i];
3590                 if (ss->rx_done.entry != NULL) {
3591                         bytes = mgp->max_intr_slots *
3592                             sizeof(*ss->rx_done.entry);
3593                         dma_free_coherent(&pdev->dev, bytes,
3594                                           ss->rx_done.entry, ss->rx_done.bus);
3595                         ss->rx_done.entry = NULL;
3596                 }
3597                 if (ss->fw_stats != NULL) {
3598                         bytes = sizeof(*ss->fw_stats);
3599                         dma_free_coherent(&pdev->dev, bytes,
3600                                           ss->fw_stats, ss->fw_stats_bus);
3601                         ss->fw_stats = NULL;
3602                 }
3603         }
3604         kfree(mgp->ss);
3605         mgp->ss = NULL;
3606 }
3607
3608 static int myri10ge_alloc_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         bytes = sizeof(*mgp->ss) * mgp->num_slices;
3616         mgp->ss = kzalloc(bytes, GFP_KERNEL);
3617         if (mgp->ss == NULL) {
3618                 return -ENOMEM;
3619         }
3620
3621         for (i = 0; i < mgp->num_slices; i++) {
3622                 ss = &mgp->ss[i];
3623                 bytes = mgp->max_intr_slots * sizeof(*ss->rx_done.entry);
3624                 ss->rx_done.entry = dma_alloc_coherent(&pdev->dev, bytes,
3625                                                        &ss->rx_done.bus,
3626                                                        GFP_KERNEL);
3627                 if (ss->rx_done.entry == NULL)
3628                         goto abort;
3629                 memset(ss->rx_done.entry, 0, bytes);
3630                 bytes = sizeof(*ss->fw_stats);
3631                 ss->fw_stats = dma_alloc_coherent(&pdev->dev, bytes,
3632                                                   &ss->fw_stats_bus,
3633                                                   GFP_KERNEL);
3634                 if (ss->fw_stats == NULL)
3635                         goto abort;
3636                 ss->mgp = mgp;
3637                 ss->dev = mgp->dev;
3638                 netif_napi_add(ss->dev, &ss->napi, myri10ge_poll,
3639                                myri10ge_napi_weight);
3640         }
3641         return 0;
3642 abort:
3643         myri10ge_free_slices(mgp);
3644         return -ENOMEM;
3645 }
3646
3647 /*
3648  * This function determines the number of slices supported.
3649  * The number slices is the minumum of the number of CPUS,
3650  * the number of MSI-X irqs supported, the number of slices
3651  * supported by the firmware
3652  */
3653 static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
3654 {
3655         struct myri10ge_cmd cmd;
3656         struct pci_dev *pdev = mgp->pdev;
3657         char *old_fw;
3658         int i, status, ncpus, msix_cap;
3659
3660         mgp->num_slices = 1;
3661         msix_cap = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3662         ncpus = num_online_cpus();
3663
3664         if (myri10ge_max_slices == 1 || msix_cap == 0 ||
3665             (myri10ge_max_slices == -1 && ncpus < 2))
3666                 return;
3667
3668         /* try to load the slice aware rss firmware */
3669         old_fw = mgp->fw_name;
3670         if (myri10ge_fw_name != NULL) {
3671                 dev_info(&mgp->pdev->dev, "overriding rss firmware to %s\n",
3672                          myri10ge_fw_name);
3673                 mgp->fw_name = myri10ge_fw_name;
3674         } else if (old_fw == myri10ge_fw_aligned)
3675                 mgp->fw_name = myri10ge_fw_rss_aligned;
3676         else
3677                 mgp->fw_name = myri10ge_fw_rss_unaligned;
3678         status = myri10ge_load_firmware(mgp, 0);
3679         if (status != 0) {
3680                 dev_info(&pdev->dev, "Rss firmware not found\n");
3681                 return;
3682         }
3683
3684         /* hit the board with a reset to ensure it is alive */
3685         memset(&cmd, 0, sizeof(cmd));
3686         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
3687         if (status != 0) {
3688                 dev_err(&mgp->pdev->dev, "failed reset\n");
3689                 goto abort_with_fw;
3690         }
3691
3692         mgp->max_intr_slots = cmd.data0 / sizeof(struct mcp_slot);
3693
3694         /* tell it the size of the interrupt queues */
3695         cmd.data0 = mgp->max_intr_slots * sizeof(struct mcp_slot);
3696         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
3697         if (status != 0) {
3698                 dev_err(&mgp->pdev->dev, "failed MXGEFW_CMD_SET_INTRQ_SIZE\n");
3699                 goto abort_with_fw;
3700         }
3701
3702         /* ask the maximum number of slices it supports */
3703         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES, &cmd, 0);
3704         if (status != 0)
3705                 goto abort_with_fw;
3706         else
3707                 mgp->num_slices = cmd.data0;
3708
3709         /* Only allow multiple slices if MSI-X is usable */
3710         if (!myri10ge_msi) {
3711                 goto abort_with_fw;
3712         }
3713
3714         /* if the admin did not specify a limit to how many
3715          * slices we should use, cap it automatically to the
3716          * number of CPUs currently online */
3717         if (myri10ge_max_slices == -1)
3718                 myri10ge_max_slices = ncpus;
3719
3720         if (mgp->num_slices > myri10ge_max_slices)
3721                 mgp->num_slices = myri10ge_max_slices;
3722
3723         /* Now try to allocate as many MSI-X vectors as we have
3724          * slices. We give up on MSI-X if we can only get a single
3725          * vector. */
3726
3727         mgp->msix_vectors = kzalloc(mgp->num_slices *
3728                                     sizeof(*mgp->msix_vectors), GFP_KERNEL);
3729         if (mgp->msix_vectors == NULL)
3730                 goto disable_msix;
3731         for (i = 0; i < mgp->num_slices; i++) {
3732                 mgp->msix_vectors[i].entry = i;
3733         }
3734
3735         while (mgp->num_slices > 1) {
3736                 /* make sure it is a power of two */
3737                 while (!is_power_of_2(mgp->num_slices))
3738                         mgp->num_slices--;
3739                 if (mgp->num_slices == 1)
3740                         goto disable_msix;
3741                 status = pci_enable_msix(pdev, mgp->msix_vectors,
3742                                          mgp->num_slices);
3743                 if (status == 0) {
3744                         pci_disable_msix(pdev);
3745                         return;
3746                 }
3747                 if (status > 0)
3748                         mgp->num_slices = status;
3749                 else
3750                         goto disable_msix;
3751         }
3752
3753 disable_msix:
3754         if (mgp->msix_vectors != NULL) {
3755                 kfree(mgp->msix_vectors);
3756                 mgp->msix_vectors = NULL;
3757         }
3758
3759 abort_with_fw:
3760         mgp->num_slices = 1;
3761         mgp->fw_name = old_fw;
3762         myri10ge_load_firmware(mgp, 0);
3763 }
3764
3765 static const struct net_device_ops myri10ge_netdev_ops = {
3766         .ndo_open               = myri10ge_open,
3767         .ndo_stop               = myri10ge_close,
3768         .ndo_start_xmit         = myri10ge_xmit,
3769         .ndo_get_stats          = myri10ge_get_stats,
3770         .ndo_validate_addr      = eth_validate_addr,
3771         .ndo_change_mtu         = myri10ge_change_mtu,
3772         .ndo_set_multicast_list = myri10ge_set_multicast_list,
3773         .ndo_set_mac_address    = myri10ge_set_mac_address,
3774 };
3775
3776 static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3777 {
3778         struct net_device *netdev;
3779         struct myri10ge_priv *mgp;
3780         struct device *dev = &pdev->dev;
3781         int i;
3782         int status = -ENXIO;
3783         int dac_enabled;
3784         unsigned hdr_offset, ss_offset;
3785         static int board_number;
3786
3787         netdev = alloc_etherdev_mq(sizeof(*mgp), MYRI10GE_MAX_SLICES);
3788         if (netdev == NULL) {
3789                 dev_err(dev, "Could not allocate ethernet device\n");
3790                 return -ENOMEM;
3791         }
3792
3793         SET_NETDEV_DEV(netdev, &pdev->dev);
3794
3795         mgp = netdev_priv(netdev);
3796         mgp->dev = netdev;
3797         mgp->pdev = pdev;
3798         mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
3799         mgp->pause = myri10ge_flow_control;
3800         mgp->intr_coal_delay = myri10ge_intr_coal_delay;
3801         mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT);
3802         mgp->board_number = board_number;
3803         init_waitqueue_head(&mgp->down_wq);
3804
3805         if (pci_enable_device(pdev)) {
3806                 dev_err(&pdev->dev, "pci_enable_device call failed\n");
3807                 status = -ENODEV;
3808                 goto abort_with_netdev;
3809         }
3810
3811         /* Find the vendor-specific cap so we can check
3812          * the reboot register later on */
3813         mgp->vendor_specific_offset
3814             = pci_find_capability(pdev, PCI_CAP_ID_VNDR);
3815
3816         /* Set our max read request to 4KB */
3817         status = pcie_set_readrq(pdev, 4096);
3818         if (status != 0) {
3819                 dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n",
3820                         status);
3821                 goto abort_with_enabled;
3822         }
3823
3824         pci_set_master(pdev);
3825         dac_enabled = 1;
3826         status = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
3827         if (status != 0) {
3828                 dac_enabled = 0;
3829                 dev_err(&pdev->dev,
3830                         "64-bit pci address mask was refused, "
3831                         "trying 32-bit\n");
3832                 status = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3833         }
3834         if (status != 0) {
3835                 dev_err(&pdev->dev, "Error %d setting DMA mask\n", status);
3836                 goto abort_with_enabled;
3837         }
3838         (void)pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
3839         mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd),
3840                                       &mgp->cmd_bus, GFP_KERNEL);
3841         if (mgp->cmd == NULL)
3842                 goto abort_with_enabled;
3843
3844         mgp->board_span = pci_resource_len(pdev, 0);
3845         mgp->iomem_base = pci_resource_start(pdev, 0);
3846         mgp->mtrr = -1;
3847         mgp->wc_enabled = 0;
3848 #ifdef CONFIG_MTRR
3849         mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span,
3850                              MTRR_TYPE_WRCOMB, 1);
3851         if (mgp->mtrr >= 0)
3852                 mgp->wc_enabled = 1;
3853 #endif
3854         mgp->sram = ioremap_wc(mgp->iomem_base, mgp->board_span);
3855         if (mgp->sram == NULL) {
3856                 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n",
3857                         mgp->board_span, mgp->iomem_base);
3858                 status = -ENXIO;
3859                 goto abort_with_mtrr;
3860         }
3861         hdr_offset =
3862             ntohl(__raw_readl(mgp->sram + MCP_HEADER_PTR_OFFSET)) & 0xffffc;
3863         ss_offset = hdr_offset + offsetof(struct mcp_gen_header, string_specs);
3864         mgp->sram_size = ntohl(__raw_readl(mgp->sram + ss_offset));
3865         if (mgp->sram_size > mgp->board_span ||
3866             mgp->sram_size <= MYRI10GE_FW_OFFSET) {
3867                 dev_err(&pdev->dev,
3868                         "invalid sram_size %dB or board span %ldB\n",
3869                         mgp->sram_size, mgp->board_span);
3870                 goto abort_with_ioremap;
3871         }
3872         memcpy_fromio(mgp->eeprom_strings,
3873                       mgp->sram + mgp->sram_size, MYRI10GE_EEPROM_STRINGS_SIZE);
3874         memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2);
3875         status = myri10ge_read_mac_addr(mgp);
3876         if (status)
3877                 goto abort_with_ioremap;
3878
3879         for (i = 0; i < ETH_ALEN; i++)
3880                 netdev->dev_addr[i] = mgp->mac_addr[i];
3881
3882         myri10ge_select_firmware(mgp);
3883
3884         status = myri10ge_load_firmware(mgp, 1);
3885         if (status != 0) {
3886                 dev_err(&pdev->dev, "failed to load firmware\n");
3887                 goto abort_with_ioremap;
3888         }
3889         myri10ge_probe_slices(mgp);
3890         status = myri10ge_alloc_slices(mgp);
3891         if (status != 0) {
3892                 dev_err(&pdev->dev, "failed to alloc slice state\n");
3893                 goto abort_with_firmware;
3894         }
3895         netdev->real_num_tx_queues = mgp->num_slices;
3896         status = myri10ge_reset(mgp);
3897         if (status != 0) {
3898                 dev_err(&pdev->dev, "failed reset\n");
3899                 goto abort_with_slices;
3900         }
3901 #ifdef CONFIG_MYRI10GE_DCA
3902         myri10ge_setup_dca(mgp);
3903 #endif
3904         pci_set_drvdata(pdev, mgp);
3905         if ((myri10ge_initial_mtu + ETH_HLEN) > MYRI10GE_MAX_ETHER_MTU)
3906                 myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
3907         if ((myri10ge_initial_mtu + ETH_HLEN) < 68)
3908                 myri10ge_initial_mtu = 68;
3909
3910         netdev->netdev_ops = &myri10ge_netdev_ops;
3911         netdev->mtu = myri10ge_initial_mtu;
3912         netdev->base_addr = mgp->iomem_base;
3913         netdev->features = mgp->features;
3914
3915         if (dac_enabled)
3916                 netdev->features |= NETIF_F_HIGHDMA;
3917         netdev->features |= NETIF_F_LRO;
3918
3919         netdev->vlan_features |= mgp->features;
3920         if (mgp->fw_ver_tiny < 37)
3921                 netdev->vlan_features &= ~NETIF_F_TSO6;
3922         if (mgp->fw_ver_tiny < 32)
3923                 netdev->vlan_features &= ~NETIF_F_TSO;
3924
3925         /* make sure we can get an irq, and that MSI can be
3926          * setup (if available).  Also ensure netdev->irq
3927          * is set to correct value if MSI is enabled */
3928         status = myri10ge_request_irq(mgp);
3929         if (status != 0)
3930                 goto abort_with_firmware;
3931         netdev->irq = pdev->irq;
3932         myri10ge_free_irq(mgp);
3933
3934         /* Save configuration space to be restored if the
3935          * nic resets due to a parity error */
3936         pci_save_state(pdev);
3937
3938         /* Setup the watchdog timer */
3939         setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer,
3940                     (unsigned long)mgp);
3941
3942         spin_lock_init(&mgp->stats_lock);
3943         SET_ETHTOOL_OPS(netdev, &myri10ge_ethtool_ops);
3944         INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog);
3945         status = register_netdev(netdev);
3946         if (status != 0) {
3947                 dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
3948                 goto abort_with_state;
3949         }
3950         if (mgp->msix_enabled)
3951                 dev_info(dev, "%d MSI-X IRQs, tx bndry %d, fw %s, WC %s\n",
3952                          mgp->num_slices, mgp->tx_boundary, mgp->fw_name,
3953                          (mgp->wc_enabled ? "Enabled" : "Disabled"));
3954         else
3955                 dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, WC %s\n",
3956                          mgp->msi_enabled ? "MSI" : "xPIC",
3957                          netdev->irq, mgp->tx_boundary, mgp->fw_name,
3958                          (mgp->wc_enabled ? "Enabled" : "Disabled"));
3959
3960         board_number++;
3961         return 0;
3962
3963 abort_with_state:
3964         pci_restore_state(pdev);
3965
3966 abort_with_slices:
3967         myri10ge_free_slices(mgp);
3968
3969 abort_with_firmware:
3970         myri10ge_dummy_rdma(mgp, 0);
3971
3972 abort_with_ioremap:
3973         if (mgp->mac_addr_string != NULL)
3974                 dev_err(&pdev->dev,
3975                         "myri10ge_probe() failed: MAC=%s, SN=%ld\n",
3976                         mgp->mac_addr_string, mgp->serial_number);
3977         iounmap(mgp->sram);
3978
3979 abort_with_mtrr:
3980 #ifdef CONFIG_MTRR
3981         if (mgp->mtrr >= 0)
3982                 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
3983 #endif
3984         dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
3985                           mgp->cmd, mgp->cmd_bus);
3986
3987 abort_with_enabled:
3988         pci_disable_device(pdev);
3989
3990 abort_with_netdev:
3991         free_netdev(netdev);
3992         return status;
3993 }
3994
3995 /*
3996  * myri10ge_remove
3997  *
3998  * Does what is necessary to shutdown one Myrinet device. Called
3999  *   once for each Myrinet card by the kernel when a module is
4000  *   unloaded.
4001  */
4002 static void myri10ge_remove(struct pci_dev *pdev)
4003 {
4004         struct myri10ge_priv *mgp;
4005         struct net_device *netdev;
4006
4007         mgp = pci_get_drvdata(pdev);
4008         if (mgp == NULL)
4009                 return;
4010
4011         flush_scheduled_work();
4012         netdev = mgp->dev;
4013         unregister_netdev(netdev);
4014
4015 #ifdef CONFIG_MYRI10GE_DCA
4016         myri10ge_teardown_dca(mgp);
4017 #endif
4018         myri10ge_dummy_rdma(mgp, 0);
4019
4020         /* avoid a memory leak */
4021         pci_restore_state(pdev);
4022
4023         iounmap(mgp->sram);
4024
4025 #ifdef CONFIG_MTRR
4026         if (mgp->mtrr >= 0)
4027                 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
4028 #endif
4029         myri10ge_free_slices(mgp);
4030         if (mgp->msix_vectors != NULL)
4031                 kfree(mgp->msix_vectors);
4032         dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
4033                           mgp->cmd, mgp->cmd_bus);
4034
4035         free_netdev(netdev);
4036         pci_disable_device(pdev);
4037         pci_set_drvdata(pdev, NULL);
4038 }
4039
4040 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E      0x0008
4041 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9    0x0009
4042
4043 static DEFINE_PCI_DEVICE_TABLE(myri10ge_pci_tbl) = {
4044         {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)},
4045         {PCI_DEVICE
4046          (PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9)},
4047         {0},
4048 };
4049
4050 MODULE_DEVICE_TABLE(pci, myri10ge_pci_tbl);
4051
4052 static struct pci_driver myri10ge_driver = {
4053         .name = "myri10ge",
4054         .probe = myri10ge_probe,
4055         .remove = myri10ge_remove,
4056         .id_table = myri10ge_pci_tbl,
4057 #ifdef CONFIG_PM
4058         .suspend = myri10ge_suspend,
4059         .resume = myri10ge_resume,
4060 #endif
4061 };
4062
4063 #ifdef CONFIG_MYRI10GE_DCA
4064 static int
4065 myri10ge_notify_dca(struct notifier_block *nb, unsigned long event, void *p)
4066 {
4067         int err = driver_for_each_device(&myri10ge_driver.driver,
4068                                          NULL, &event,
4069                                          myri10ge_notify_dca_device);
4070
4071         if (err)
4072                 return NOTIFY_BAD;
4073         return NOTIFY_DONE;
4074 }
4075
4076 static struct notifier_block myri10ge_dca_notifier = {
4077         .notifier_call = myri10ge_notify_dca,
4078         .next = NULL,
4079         .priority = 0,
4080 };
4081 #endif                          /* CONFIG_MYRI10GE_DCA */
4082
4083 static __init int myri10ge_init_module(void)
4084 {
4085         pr_info("Version %s\n", MYRI10GE_VERSION_STR);
4086
4087         if (myri10ge_rss_hash > MXGEFW_RSS_HASH_TYPE_MAX) {
4088                 pr_err("Illegal rssh hash type %d, defaulting to source port\n",
4089                        myri10ge_rss_hash);
4090                 myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT;
4091         }
4092 #ifdef CONFIG_MYRI10GE_DCA
4093         dca_register_notify(&myri10ge_dca_notifier);
4094 #endif
4095         if (myri10ge_max_slices > MYRI10GE_MAX_SLICES)
4096                 myri10ge_max_slices = MYRI10GE_MAX_SLICES;
4097
4098         return pci_register_driver(&myri10ge_driver);
4099 }
4100
4101 module_init(myri10ge_init_module);
4102
4103 static __exit void myri10ge_cleanup_module(void)
4104 {
4105 #ifdef CONFIG_MYRI10GE_DCA
4106         dca_unregister_notify(&myri10ge_dca_notifier);
4107 #endif
4108         pci_unregister_driver(&myri10ge_driver);
4109 }
4110
4111 module_exit(myri10ge_cleanup_module);