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   1 /*************************************************************************
   2  * myri10ge.c: Myricom Myri-10G Ethernet driver.
   3  *
   4  * Copyright (C) 2005 - 2009 Myricom, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of Myricom, Inc. nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  20  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  23  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  *
  31  *
  32  * If the eeprom on your board is not recent enough, you will need to get a
  33  * newer firmware image at:
  34  *   http://www.myri.com/scs/download-Myri10GE.html
  35  *
  36  * Contact Information:
  37  *   <help@myri.com>
  38  *   Myricom, Inc., 325N Santa Anita Avenue, Arcadia, CA 91006
  39  *************************************************************************/
  40
  41 #include <linux/tcp.h>
  42 #include <linux/netdevice.h>
  43 #include <linux/skbuff.h>
  44 #include <linux/string.h>
  45 #include <linux/module.h>
  46 #include <linux/pci.h>
  47 #include <linux/dma-mapping.h>
  48 #include <linux/etherdevice.h>
  49 #include <linux/if_ether.h>
  50 #include <linux/if_vlan.h>
  51 #include <linux/inet_lro.h>
  52 #include <linux/dca.h>
  53 #include <linux/ip.h>
  54 #include <linux/inet.h>
  55 #include <linux/in.h>
  56 #include <linux/ethtool.h>
  57 #include <linux/firmware.h>
  58 #include <linux/delay.h>
  59 #include <linux/timer.h>
  60 #include <linux/vmalloc.h>
  61 #include <linux/crc32.h>
  62 #include <linux/moduleparam.h>
  63 #include <linux/io.h>
  64 #include <linux/log2.h>
  65 #include <net/checksum.h>
  66 #include <net/ip.h>
  67 #include <net/tcp.h>
  68 #include <asm/byteorder.h>
  69 #include <asm/io.h>
  70 #include <asm/processor.h>
  71 #ifdef CONFIG_MTRR
  72 #include <asm/mtrr.h>
  73 #endif
  74
  75 #include "myri10ge_mcp.h"
  76 #include "myri10ge_mcp_gen_header.h"
  77
  78 #define MYRI10GE_VERSION_STR "1.4.4-1.401"
  79
  80 MODULE_DESCRIPTION("Myricom 10G driver (10GbE)");
  81 MODULE_AUTHOR("Maintainer: help@myri.com");
  82 MODULE_VERSION(MYRI10GE_VERSION_STR);
  83 MODULE_LICENSE("Dual BSD/GPL");
  84
  85 #define MYRI10GE_MAX_ETHER_MTU 9014
  86
  87 #define MYRI10GE_ETH_STOPPED 0
  88 #define MYRI10GE_ETH_STOPPING 1
  89 #define MYRI10GE_ETH_STARTING 2
  90 #define MYRI10GE_ETH_RUNNING 3
  91 #define MYRI10GE_ETH_OPEN_FAILED 4
  92
  93 #define MYRI10GE_EEPROM_STRINGS_SIZE 256
  94 #define MYRI10GE_MAX_SEND_DESC_TSO ((65536 / 2048) * 2)
  95 #define MYRI10GE_MAX_LRO_DESCRIPTORS 8
  96 #define MYRI10GE_LRO_MAX_PKTS 64
  97
  98 #define MYRI10GE_NO_CONFIRM_DATA htonl(0xffffffff)
  99 #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff
 100
 101 #define MYRI10GE_ALLOC_ORDER 0
 102 #define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE)
 103 #define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1)
 104
 105 #define MYRI10GE_MAX_SLICES 32
 106
 107 struct myri10ge_rx_buffer_state {
 108         struct page *page;
 109         int page_offset;
 110          DECLARE_PCI_UNMAP_ADDR(bus)
 111          DECLARE_PCI_UNMAP_LEN(len)
 112 };
 113
 114 struct myri10ge_tx_buffer_state {
 115         struct sk_buff *skb;
 116         int last;
 117          DECLARE_PCI_UNMAP_ADDR(bus)
 118          DECLARE_PCI_UNMAP_LEN(len)
 119 };
 120
 121 struct myri10ge_cmd {
 122         u32 data0;
 123         u32 data1;
 124         u32 data2;
 125 };
 126
 127 struct myri10ge_rx_buf {
 128         struct mcp_kreq_ether_recv __iomem *lanai;      /* lanai ptr for recv ring */
 129         struct mcp_kreq_ether_recv *shadow;     /* host shadow of recv ring */
 130         struct myri10ge_rx_buffer_state *info;
 131         struct page *page;
 132         dma_addr_t bus;
 133         int page_offset;
 134         int cnt;
 135         int fill_cnt;
 136         int alloc_fail;
 137         int mask;               /* number of rx slots -1 */
 138         int watchdog_needed;
 139 };
 140
 141 struct myri10ge_tx_buf {
 142         struct mcp_kreq_ether_send __iomem *lanai;      /* lanai ptr for sendq */
 143         __be32 __iomem *send_go;        /* "go" doorbell ptr */
 144         __be32 __iomem *send_stop;      /* "stop" doorbell ptr */
 145         struct mcp_kreq_ether_send *req_list;   /* host shadow of sendq */
 146         char *req_bytes;
 147         struct myri10ge_tx_buffer_state *info;
 148         int mask;               /* number of transmit slots -1  */
 149         int req ____cacheline_aligned;  /* transmit slots submitted     */
 150         int pkt_start;          /* packets started */
 151         int stop_queue;
 152         int linearized;
 153         int done ____cacheline_aligned; /* transmit slots completed     */
 154         int pkt_done;           /* packets completed */
 155         int wake_queue;
 156         int queue_active;
 157 };
 158
 159 struct myri10ge_rx_done {
 160         struct mcp_slot *entry;
 161         dma_addr_t bus;
 162         int cnt;
 163         int idx;
 164         struct net_lro_mgr lro_mgr;
 165         struct net_lro_desc lro_desc[MYRI10GE_MAX_LRO_DESCRIPTORS];
 166 };
 167
 168 struct myri10ge_slice_netstats {
 169         unsigned long rx_packets;
 170         unsigned long tx_packets;
 171         unsigned long rx_bytes;
 172         unsigned long tx_bytes;
 173         unsigned long rx_dropped;
 174         unsigned long tx_dropped;
 175 };
 176
 177 struct myri10ge_slice_state {
 178         struct myri10ge_tx_buf tx;      /* transmit ring        */
 179         struct myri10ge_rx_buf rx_small;
 180         struct myri10ge_rx_buf rx_big;
 181         struct myri10ge_rx_done rx_done;
 182         struct net_device *dev;
 183         struct napi_struct napi;
 184         struct myri10ge_priv *mgp;
 185         struct myri10ge_slice_netstats stats;
 186         __be32 __iomem *irq_claim;
 187         struct mcp_irq_data *fw_stats;
 188         dma_addr_t fw_stats_bus;
 189         int watchdog_tx_done;
 190         int watchdog_tx_req;
 191 #ifdef CONFIG_MYRI10GE_DCA
 192         int cached_dca_tag;
 193         int cpu;
 194         __be32 __iomem *dca_tag;
 195 #endif
 196         char irq_desc[32];
 197 };
 198
 199 struct myri10ge_priv {
 200         struct myri10ge_slice_state *ss;
 201         int tx_boundary;        /* boundary transmits cannot cross */
 202         int num_slices;
 203         int running;            /* running?             */
 204         int csum_flag;          /* rx_csums?            */
 205         int small_bytes;
 206         int big_bytes;
 207         int max_intr_slots;
 208         struct net_device *dev;
 209         struct net_device_stats stats;
 210         spinlock_t stats_lock;
 211         u8 __iomem *sram;
 212         int sram_size;
 213         unsigned long board_span;
 214         unsigned long iomem_base;
 215         __be32 __iomem *irq_deassert;
 216         char *mac_addr_string;
 217         struct mcp_cmd_response *cmd;
 218         dma_addr_t cmd_bus;
 219         struct pci_dev *pdev;
 220         int msi_enabled;
 221         int msix_enabled;
 222         struct msix_entry *msix_vectors;
 223 #ifdef CONFIG_MYRI10GE_DCA
 224         int dca_enabled;
 225 #endif
 226         u32 link_state;
 227         unsigned int rdma_tags_available;
 228         int intr_coal_delay;
 229         __be32 __iomem *intr_coal_delay_ptr;
 230         int mtrr;
 231         int wc_enabled;
 232         int down_cnt;
 233         wait_queue_head_t down_wq;
 234         struct work_struct watchdog_work;
 235         struct timer_list watchdog_timer;
 236         int watchdog_resets;
 237         int watchdog_pause;
 238         int pause;
 239         char *fw_name;
 240         char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
 241         char *product_code_string;
 242         char fw_version[128];
 243         int fw_ver_major;
 244         int fw_ver_minor;
 245         int fw_ver_tiny;
 246         int adopted_rx_filter_bug;
 247         u8 mac_addr[6];         /* eeprom mac address */
 248         unsigned long serial_number;
 249         int vendor_specific_offset;
 250         int fw_multicast_support;
 251         unsigned long features;
 252         u32 max_tso6;
 253         u32 read_dma;
 254         u32 write_dma;
 255         u32 read_write_dma;
 256         u32 link_changes;
 257         u32 msg_enable;
 258 };
 259
 260 static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
 261 static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
 262 static char *myri10ge_fw_rss_unaligned = "myri10ge_rss_ethp_z8e.dat";
 263 static char *myri10ge_fw_rss_aligned = "myri10ge_rss_eth_z8e.dat";
 264
 265 static char *myri10ge_fw_name = NULL;
 266 module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR);
 267 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name");
 268
 269 static int myri10ge_ecrc_enable = 1;
 270 module_param(myri10ge_ecrc_enable, int, S_IRUGO);
 271 MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E");
 272
 273 static int myri10ge_small_bytes = -1;   /* -1 == auto */
 274 module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR);
 275 MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets");
 276
 277 static int myri10ge_msi = 1;    /* enable msi by default */
 278 module_param(myri10ge_msi, int, S_IRUGO | S_IWUSR);
 279 MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts");
 280
 281 static int myri10ge_intr_coal_delay = 75;
 282 module_param(myri10ge_intr_coal_delay, int, S_IRUGO);
 283 MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay");
 284
 285 static int myri10ge_flow_control = 1;
 286 module_param(myri10ge_flow_control, int, S_IRUGO);
 287 MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter");
 288
 289 static int myri10ge_deassert_wait = 1;
 290 module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR);
 291 MODULE_PARM_DESC(myri10ge_deassert_wait,
 292                  "Wait when deasserting legacy interrupts");
 293
 294 static int myri10ge_force_firmware = 0;
 295 module_param(myri10ge_force_firmware, int, S_IRUGO);
 296 MODULE_PARM_DESC(myri10ge_force_firmware,
 297                  "Force firmware to assume aligned completions");
 298
 299 static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
 300 module_param(myri10ge_initial_mtu, int, S_IRUGO);
 301 MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU");
 302
 303 static int myri10ge_napi_weight = 64;
 304 module_param(myri10ge_napi_weight, int, S_IRUGO);
 305 MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight");
 306
 307 static int myri10ge_watchdog_timeout = 1;
 308 module_param(myri10ge_watchdog_timeout, int, S_IRUGO);
 309 MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout");
 310
 311 static int myri10ge_max_irq_loops = 1048576;
 312 module_param(myri10ge_max_irq_loops, int, S_IRUGO);
 313 MODULE_PARM_DESC(myri10ge_max_irq_loops,
 314                  "Set stuck legacy IRQ detection threshold");
 315
 316 #define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK
 317
 318 static int myri10ge_debug = -1; /* defaults above */
 319 module_param(myri10ge_debug, int, 0);
 320 MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)");
 321
 322 static int myri10ge_lro = 1;
 323 module_param(myri10ge_lro, int, S_IRUGO);
 324 MODULE_PARM_DESC(myri10ge_lro, "Enable large receive offload");
 325
 326 static int myri10ge_lro_max_pkts = MYRI10GE_LRO_MAX_PKTS;
 327 module_param(myri10ge_lro_max_pkts, int, S_IRUGO);
 328 MODULE_PARM_DESC(myri10ge_lro_max_pkts,
 329                  "Number of LRO packets to be aggregated");
 330
 331 static int myri10ge_fill_thresh = 256;
 332 module_param(myri10ge_fill_thresh, int, S_IRUGO | S_IWUSR);
 333 MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed");
 334
 335 static int myri10ge_reset_recover = 1;
 336
 337 static int myri10ge_max_slices = 1;
 338 module_param(myri10ge_max_slices, int, S_IRUGO);
 339 MODULE_PARM_DESC(myri10ge_max_slices, "Max tx/rx queues");
 340
 341 static int myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT;
 342 module_param(myri10ge_rss_hash, int, S_IRUGO);
 343 MODULE_PARM_DESC(myri10ge_rss_hash, "Type of RSS hashing to do");
 344
 345 static int myri10ge_dca = 1;
 346 module_param(myri10ge_dca, int, S_IRUGO);
 347 MODULE_PARM_DESC(myri10ge_dca, "Enable DCA if possible");
 348
 349 #define MYRI10GE_FW_OFFSET 1024*1024
 350 #define MYRI10GE_HIGHPART_TO_U32(X) \
 351 (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0)
 352 #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X))
 353
 354 #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8)
 355
 356 static void myri10ge_set_multicast_list(struct net_device *dev);
 357 static int myri10ge_sw_tso(struct sk_buff *skb, struct net_device *dev);
 358
 359 static inline void put_be32(__be32 val, __be32 __iomem * p)
 360 {
 361         __raw_writel((__force __u32) val, (__force void __iomem *)p);
 362 }
 363
 364 static int
 365 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
 366                   struct myri10ge_cmd *data, int atomic)
 367 {
 368         struct mcp_cmd *buf;
 369         char buf_bytes[sizeof(*buf) + 8];
 370         struct mcp_cmd_response *response = mgp->cmd;
 371         char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD;
 372         u32 dma_low, dma_high, result, value;
 373         int sleep_total = 0;
 374
 375         /* ensure buf is aligned to 8 bytes */
 376         buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8);
 377
 378         buf->data0 = htonl(data->data0);
 379         buf->data1 = htonl(data->data1);
 380         buf->data2 = htonl(data->data2);
 381         buf->cmd = htonl(cmd);
 382         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
 383         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
 384
 385         buf->response_addr.low = htonl(dma_low);
 386         buf->response_addr.high = htonl(dma_high);
 387         response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT);
 388         mb();
 389         myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf));
 390
 391         /* wait up to 15ms. Longest command is the DMA benchmark,
 392          * which is capped at 5ms, but runs from a timeout handler
 393          * that runs every 7.8ms. So a 15ms timeout leaves us with
 394          * a 2.2ms margin
 395          */
 396         if (atomic) {
 397                 /* if atomic is set, do not sleep,
 398                  * and try to get the completion quickly
 399                  * (1ms will be enough for those commands) */
 400                 for (sleep_total = 0;
 401                      sleep_total < 1000
 402                      && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
 403                      sleep_total += 10) {
 404                         udelay(10);
 405                         mb();
 406                 }
 407         } else {
 408                 /* use msleep for most command */
 409                 for (sleep_total = 0;
 410                      sleep_total < 15
 411                      && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
 412                      sleep_total++)
 413                         msleep(1);
 414         }
 415
 416         result = ntohl(response->result);
 417         value = ntohl(response->data);
 418         if (result != MYRI10GE_NO_RESPONSE_RESULT) {
 419                 if (result == 0) {
 420                         data->data0 = value;
 421                         return 0;
 422                 } else if (result == MXGEFW_CMD_UNKNOWN) {
 423                         return -ENOSYS;
 424                 } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) {
 425                         return -E2BIG;
 426                 } else if (result == MXGEFW_CMD_ERROR_RANGE &&
 427                            cmd == MXGEFW_CMD_ENABLE_RSS_QUEUES &&
 428                            (data->
 429                             data1 & MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES) !=
 430                            0) {
 431                         return -ERANGE;
 432                 } else {
 433                         dev_err(&mgp->pdev->dev,
 434                                 "command %d failed, result = %d\n",
 435                                 cmd, result);
 436                         return -ENXIO;
 437                 }
 438         }
 439
 440         dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
 441                 cmd, result);
 442         return -EAGAIN;
 443 }
 444
 445 /*
 446  * The eeprom strings on the lanaiX have the format
 447  * SN=x\0
 448  * MAC=x:x:x:x:x:x\0
 449  * PT:ddd mmm xx xx:xx:xx xx\0
 450  * PV:ddd mmm xx xx:xx:xx xx\0
 451  */
 452 static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp)
 453 {
 454         char *ptr, *limit;
 455         int i;
 456
 457         ptr = mgp->eeprom_strings;
 458         limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE;
 459
 460         while (*ptr != '\0' && ptr < limit) {
 461                 if (memcmp(ptr, "MAC=", 4) == 0) {
 462                         ptr += 4;
 463                         mgp->mac_addr_string = ptr;
 464                         for (i = 0; i < 6; i++) {
 465                                 if ((ptr + 2) > limit)
 466                                         goto abort;
 467                                 mgp->mac_addr[i] =
 468                                     simple_strtoul(ptr, &ptr, 16);
 469                                 ptr += 1;
 470                         }
 471                 }
 472                 if (memcmp(ptr, "PC=", 3) == 0) {
 473                         ptr += 3;
 474                         mgp->product_code_string = ptr;
 475                 }
 476                 if (memcmp((const void *)ptr, "SN=", 3) == 0) {
 477                         ptr += 3;
 478                         mgp->serial_number = simple_strtoul(ptr, &ptr, 10);
 479                 }
 480                 while (ptr < limit && *ptr++) ;
 481         }
 482
 483         return 0;
 484
 485 abort:
 486         dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n");
 487         return -ENXIO;
 488 }
 489
 490 /*
 491  * Enable or disable periodic RDMAs from the host to make certain
 492  * chipsets resend dropped PCIe messages
 493  */
 494
 495 static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable)
 496 {
 497         char __iomem *submit;
 498         __be32 buf[16] __attribute__ ((__aligned__(8)));
 499         u32 dma_low, dma_high;
 500         int i;
 501
 502         /* clear confirmation addr */
 503         mgp->cmd->data = 0;
 504         mb();
 505
 506         /* send a rdma command to the PCIe engine, and wait for the
 507          * response in the confirmation address.  The firmware should
 508          * write a -1 there to indicate it is alive and well
 509          */
 510         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
 511         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
 512
 513         buf[0] = htonl(dma_high);       /* confirm addr MSW */
 514         buf[1] = htonl(dma_low);        /* confirm addr LSW */
 515         buf[2] = MYRI10GE_NO_CONFIRM_DATA;      /* confirm data */
 516         buf[3] = htonl(dma_high);       /* dummy addr MSW */
 517         buf[4] = htonl(dma_low);        /* dummy addr LSW */
 518         buf[5] = htonl(enable); /* enable? */
 519
 520         submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA;
 521
 522         myri10ge_pio_copy(submit, &buf, sizeof(buf));
 523         for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++)
 524                 msleep(1);
 525         if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA)
 526                 dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n",
 527                         (enable ? "enable" : "disable"));
 528 }
 529
 530 static int
 531 myri10ge_validate_firmware(struct myri10ge_priv *mgp,
 532                            struct mcp_gen_header *hdr)
 533 {
 534         struct device *dev = &mgp->pdev->dev;
 535
 536         /* check firmware type */
 537         if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) {
 538                 dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type));
 539                 return -EINVAL;
 540         }
 541
 542         /* save firmware version for ethtool */
 543         strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
 544
 545         sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major,
 546                &mgp->fw_ver_minor, &mgp->fw_ver_tiny);
 547
 548         if (!(mgp->fw_ver_major == MXGEFW_VERSION_MAJOR
 549               && mgp->fw_ver_minor == MXGEFW_VERSION_MINOR)) {
 550                 dev_err(dev, "Found firmware version %s\n", mgp->fw_version);
 551                 dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR,
 552                         MXGEFW_VERSION_MINOR);
 553                 return -EINVAL;
 554         }
 555         return 0;
 556 }
 557
 558 static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
 559 {
 560         unsigned crc, reread_crc;
 561         const struct firmware *fw;
 562         struct device *dev = &mgp->pdev->dev;
 563         unsigned char *fw_readback;
 564         struct mcp_gen_header *hdr;
 565         size_t hdr_offset;
 566         int status;
 567         unsigned i;
 568
 569         if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) {
 570                 dev_err(dev, "Unable to load %s firmware image via hotplug\n",
 571                         mgp->fw_name);
 572                 status = -EINVAL;
 573                 goto abort_with_nothing;
 574         }
 575
 576         /* check size */
 577
 578         if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET ||
 579             fw->size < MCP_HEADER_PTR_OFFSET + 4) {
 580                 dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size);
 581                 status = -EINVAL;
 582                 goto abort_with_fw;
 583         }
 584
 585         /* check id */
 586         hdr_offset = ntohl(*(__be32 *) (fw->data + MCP_HEADER_PTR_OFFSET));
 587         if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) {
 588                 dev_err(dev, "Bad firmware file\n");
 589                 status = -EINVAL;
 590                 goto abort_with_fw;
 591         }
 592         hdr = (void *)(fw->data + hdr_offset);
 593
 594         status = myri10ge_validate_firmware(mgp, hdr);
 595         if (status != 0)
 596                 goto abort_with_fw;
 597
 598         crc = crc32(~0, fw->data, fw->size);
 599         for (i = 0; i < fw->size; i += 256) {
 600                 myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i,
 601                                   fw->data + i,
 602                                   min(256U, (unsigned)(fw->size - i)));
 603                 mb();
 604                 readb(mgp->sram);
 605         }
 606         fw_readback = vmalloc(fw->size);
 607         if (!fw_readback) {
 608                 status = -ENOMEM;
 609                 goto abort_with_fw;
 610         }
 611         /* corruption checking is good for parity recovery and buggy chipset */
 612         memcpy_fromio(fw_readback, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);
 613         reread_crc = crc32(~0, fw_readback, fw->size);
 614         vfree(fw_readback);
 615         if (crc != reread_crc) {
 616                 dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n",
 617                         (unsigned)fw->size, reread_crc, crc);
 618                 status = -EIO;
 619                 goto abort_with_fw;
 620         }
 621         *size = (u32) fw->size;
 622
 623 abort_with_fw:
 624         release_firmware(fw);
 625
 626 abort_with_nothing:
 627         return status;
 628 }
 629
 630 static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp)
 631 {
 632         struct mcp_gen_header *hdr;
 633         struct device *dev = &mgp->pdev->dev;
 634         const size_t bytes = sizeof(struct mcp_gen_header);
 635         size_t hdr_offset;
 636         int status;
 637
 638         /* find running firmware header */
 639         hdr_offset = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
 640
 641         if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) {
 642                 dev_err(dev, "Running firmware has bad header offset (%d)\n",
 643                         (int)hdr_offset);
 644                 return -EIO;
 645         }
 646
 647         /* copy header of running firmware from SRAM to host memory to
 648          * validate firmware */
 649         hdr = kmalloc(bytes, GFP_KERNEL);
 650         if (hdr == NULL) {
 651                 dev_err(dev, "could not malloc firmware hdr\n");
 652                 return -ENOMEM;
 653         }
 654         memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes);
 655         status = myri10ge_validate_firmware(mgp, hdr);
 656         kfree(hdr);
 657
 658         /* check to see if adopted firmware has bug where adopting
 659          * it will cause broadcasts to be filtered unless the NIC
 660          * is kept in ALLMULTI mode */
 661         if (mgp->fw_ver_major == 1 && mgp->fw_ver_minor == 4 &&
 662             mgp->fw_ver_tiny >= 4 && mgp->fw_ver_tiny <= 11) {
 663                 mgp->adopted_rx_filter_bug = 1;
 664                 dev_warn(dev, "Adopting fw %d.%d.%d: "
 665                          "working around rx filter bug\n",
 666                          mgp->fw_ver_major, mgp->fw_ver_minor,
 667                          mgp->fw_ver_tiny);
 668         }
 669         return status;
 670 }
 671
 672 static int myri10ge_get_firmware_capabilities(struct myri10ge_priv *mgp)
 673 {
 674         struct myri10ge_cmd cmd;
 675         int status;
 676
 677         /* probe for IPv6 TSO support */
 678         mgp->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
 679         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_TSO6_HDR_SIZE,
 680                                    &cmd, 0);
 681         if (status == 0) {
 682                 mgp->max_tso6 = cmd.data0;
 683                 mgp->features |= NETIF_F_TSO6;
 684         }
 685
 686         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
 687         if (status != 0) {
 688                 dev_err(&mgp->pdev->dev,
 689                         "failed MXGEFW_CMD_GET_RX_RING_SIZE\n");
 690                 return -ENXIO;
 691         }
 692
 693         mgp->max_intr_slots = 2 * (cmd.data0 / sizeof(struct mcp_dma_addr));
 694
 695         return 0;
 696 }
 697
 698 static int myri10ge_load_firmware(struct myri10ge_priv *mgp, int adopt)
 699 {
 700         char __iomem *submit;
 701         __be32 buf[16] __attribute__ ((__aligned__(8)));
 702         u32 dma_low, dma_high, size;
 703         int status, i;
 704
 705         size = 0;
 706         status = myri10ge_load_hotplug_firmware(mgp, &size);
 707         if (status) {
 708                 if (!adopt)
 709                         return status;
 710                 dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n");
 711
 712                 /* Do not attempt to adopt firmware if there
 713                  * was a bad crc */
 714                 if (status == -EIO)
 715                         return status;
 716
 717                 status = myri10ge_adopt_running_firmware(mgp);
 718                 if (status != 0) {
 719                         dev_err(&mgp->pdev->dev,
 720                                 "failed to adopt running firmware\n");
 721                         return status;
 722                 }
 723                 dev_info(&mgp->pdev->dev,
 724                          "Successfully adopted running firmware\n");
 725                 if (mgp->tx_boundary == 4096) {
 726                         dev_warn(&mgp->pdev->dev,
 727                                  "Using firmware currently running on NIC"
 728                                  ".  For optimal\n");
 729                         dev_warn(&mgp->pdev->dev,
 730                                  "performance consider loading optimized "
 731                                  "firmware\n");
 732                         dev_warn(&mgp->pdev->dev, "via hotplug\n");
 733                 }
 734
 735                 mgp->fw_name = "adopted";
 736                 mgp->tx_boundary = 2048;
 737                 myri10ge_dummy_rdma(mgp, 1);
 738                 status = myri10ge_get_firmware_capabilities(mgp);
 739                 return status;
 740         }
 741
 742         /* clear confirmation addr */
 743         mgp->cmd->data = 0;
 744         mb();
 745
 746         /* send a reload command to the bootstrap MCP, and wait for the
 747          *  response in the confirmation address.  The firmware should
 748          * write a -1 there to indicate it is alive and well
 749          */
 750         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
 751         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
 752
 753         buf[0] = htonl(dma_high);       /* confirm addr MSW */
 754         buf[1] = htonl(dma_low);        /* confirm addr LSW */
 755         buf[2] = MYRI10GE_NO_CONFIRM_DATA;      /* confirm data */
 756
 757         /* FIX: All newest firmware should un-protect the bottom of
 758          * the sram before handoff. However, the very first interfaces
 759          * do not. Therefore the handoff copy must skip the first 8 bytes
 760          */
 761         buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */
 762         buf[4] = htonl(size - 8);       /* length of code */
 763         buf[5] = htonl(8);      /* where to copy to */
 764         buf[6] = htonl(0);      /* where to jump to */
 765
 766         submit = mgp->sram + MXGEFW_BOOT_HANDOFF;
 767
 768         myri10ge_pio_copy(submit, &buf, sizeof(buf));
 769         mb();
 770         msleep(1);
 771         mb();
 772         i = 0;
 773         while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 9) {
 774                 msleep(1 << i);
 775                 i++;
 776         }
 777         if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) {
 778                 dev_err(&mgp->pdev->dev, "handoff failed\n");
 779                 return -ENXIO;
 780         }
 781         myri10ge_dummy_rdma(mgp, 1);
 782         status = myri10ge_get_firmware_capabilities(mgp);
 783
 784         return status;
 785 }
 786
 787 static int myri10ge_update_mac_address(struct myri10ge_priv *mgp, u8 * addr)
 788 {
 789         struct myri10ge_cmd cmd;
 790         int status;
 791
 792         cmd.data0 = ((addr[0] << 24) | (addr[1] << 16)
 793                      | (addr[2] << 8) | addr[3]);
 794
 795         cmd.data1 = ((addr[4] << 8) | (addr[5]));
 796
 797         status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0);
 798         return status;
 799 }
 800
 801 static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause)
 802 {
 803         struct myri10ge_cmd cmd;
 804         int status, ctl;
 805
 806         ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL;
 807         status = myri10ge_send_cmd(mgp, ctl, &cmd, 0);
 808
 809         if (status) {
 810                 printk(KERN_ERR
 811                        "myri10ge: %s: Failed to set flow control mode\n",
 812                        mgp->dev->name);
 813                 return status;
 814         }
 815         mgp->pause = pause;
 816         return 0;
 817 }
 818
 819 static void
 820 myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic)
 821 {
 822         struct myri10ge_cmd cmd;
 823         int status, ctl;
 824
 825         ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC;
 826         status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic);
 827         if (status)
 828                 printk(KERN_ERR "myri10ge: %s: Failed to set promisc mode\n",
 829                        mgp->dev->name);
 830 }
 831
 832 static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type)
 833 {
 834         struct myri10ge_cmd cmd;
 835         int status;
 836         u32 len;
 837         struct page *dmatest_page;
 838         dma_addr_t dmatest_bus;
 839         char *test = " ";
 840
 841         dmatest_page = alloc_page(GFP_KERNEL);
 842         if (!dmatest_page)
 843                 return -ENOMEM;
 844         dmatest_bus = pci_map_page(mgp->pdev, dmatest_page, 0, PAGE_SIZE,
 845                                    DMA_BIDIRECTIONAL);
 846
 847         /* Run a small DMA test.
 848          * The magic multipliers to the length tell the firmware
 849          * to do DMA read, write, or read+write tests.  The
 850          * results are returned in cmd.data0.  The upper 16
 851          * bits or the return is the number of transfers completed.
 852          * The lower 16 bits is the time in 0.5us ticks that the
 853          * transfers took to complete.
 854          */
 855
 856         len = mgp->tx_boundary;
 857
 858         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
 859         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
 860         cmd.data2 = len * 0x10000;
 861         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
 862         if (status != 0) {
 863                 test = "read";
 864                 goto abort;
 865         }
 866         mgp->read_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
 867         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
 868         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
 869         cmd.data2 = len * 0x1;
 870         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
 871         if (status != 0) {
 872                 test = "write";
 873                 goto abort;
 874         }
 875         mgp->write_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
 876
 877         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
 878         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
 879         cmd.data2 = len * 0x10001;
 880         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
 881         if (status != 0) {
 882                 test = "read/write";
 883                 goto abort;
 884         }
 885         mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) /
 886             (cmd.data0 & 0xffff);
 887
 888 abort:
 889         pci_unmap_page(mgp->pdev, dmatest_bus, PAGE_SIZE, DMA_BIDIRECTIONAL);
 890         put_page(dmatest_page);
 891
 892         if (status != 0 && test_type != MXGEFW_CMD_UNALIGNED_TEST)
 893                 dev_warn(&mgp->pdev->dev, "DMA %s benchmark failed: %d\n",
 894                          test, status);
 895
 896         return status;
 897 }
 898
 899 static int myri10ge_reset(struct myri10ge_priv *mgp)
 900 {
 901         struct myri10ge_cmd cmd;
 902         struct myri10ge_slice_state *ss;
 903         int i, status;
 904         size_t bytes;
 905 #ifdef CONFIG_MYRI10GE_DCA
 906         unsigned long dca_tag_off;
 907 #endif
 908
 909         /* try to send a reset command to the card to see if it
 910          * is alive */
 911         memset(&cmd, 0, sizeof(cmd));
 912         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
 913         if (status != 0) {
 914                 dev_err(&mgp->pdev->dev, "failed reset\n");
 915                 return -ENXIO;
 916         }
 917
 918         (void)myri10ge_dma_test(mgp, MXGEFW_DMA_TEST);
 919         /*
 920          * Use non-ndis mcp_slot (eg, 4 bytes total,
 921          * no toeplitz hash value returned.  Older firmware will
 922          * not understand this command, but will use the correct
 923          * sized mcp_slot, so we ignore error returns
 924          */
 925         cmd.data0 = MXGEFW_RSS_MCP_SLOT_TYPE_MIN;
 926         (void)myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_MCP_SLOT_TYPE, &cmd, 0);
 927
 928         /* Now exchange information about interrupts  */
 929
 930         bytes = mgp->max_intr_slots * sizeof(*mgp->ss[0].rx_done.entry);
 931         cmd.data0 = (u32) bytes;
 932         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
 933
 934         /*
 935          * Even though we already know how many slices are supported
 936          * via myri10ge_probe_slices() MXGEFW_CMD_GET_MAX_RSS_QUEUES
 937          * has magic side effects, and must be called after a reset.
 938          * It must be called prior to calling any RSS related cmds,
 939          * including assigning an interrupt queue for anything but
 940          * slice 0.  It must also be called *after*
 941          * MXGEFW_CMD_SET_INTRQ_SIZE, since the intrq size is used by
 942          * the firmware to compute offsets.
 943          */
 944
 945         if (mgp->num_slices > 1) {
 946
 947                 /* ask the maximum number of slices it supports */
 948                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES,
 949                                            &cmd, 0);
 950                 if (status != 0) {
 951                         dev_err(&mgp->pdev->dev,
 952                                 "failed to get number of slices\n");
 953                 }
 954
 955                 /*
 956                  * MXGEFW_CMD_ENABLE_RSS_QUEUES must be called prior
 957                  * to setting up the interrupt queue DMA
 958                  */
 959
 960                 cmd.data0 = mgp->num_slices;
 961                 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
 962                 if (mgp->dev->real_num_tx_queues > 1)
 963                         cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
 964                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
 965                                            &cmd, 0);
 966
 967                 /* Firmware older than 1.4.32 only supports multiple
 968                  * RX queues, so if we get an error, first retry using a
 969                  * single TX queue before giving up */
 970                 if (status != 0 && mgp->dev->real_num_tx_queues > 1) {
 971                         mgp->dev->real_num_tx_queues = 1;
 972                         cmd.data0 = mgp->num_slices;
 973                         cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
 974                         status = myri10ge_send_cmd(mgp,
 975                                                    MXGEFW_CMD_ENABLE_RSS_QUEUES,
 976                                                    &cmd, 0);
 977                 }
 978
 979                 if (status != 0) {
 980                         dev_err(&mgp->pdev->dev,
 981                                 "failed to set number of slices\n");
 982
 983                         return status;
 984                 }
 985         }
 986         for (i = 0; i < mgp->num_slices; i++) {
 987                 ss = &mgp->ss[i];
 988                 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->rx_done.bus);
 989                 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->rx_done.bus);
 990                 cmd.data2 = i;
 991                 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA,
 992                                             &cmd, 0);
 993         };
 994
 995         status |=
 996             myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0);
 997         for (i = 0; i < mgp->num_slices; i++) {
 998                 ss = &mgp->ss[i];
 999                 ss->irq_claim =
1000                     (__iomem __be32 *) (mgp->sram + cmd.data0 + 8 * i);
1001         }
1002         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET,
1003                                     &cmd, 0);
1004         mgp->irq_deassert = (__iomem __be32 *) (mgp->sram + cmd.data0);
1005
1006         status |= myri10ge_send_cmd
1007             (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0);
1008         mgp->intr_coal_delay_ptr = (__iomem __be32 *) (mgp->sram + cmd.data0);
1009         if (status != 0) {
1010                 dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n");
1011                 return status;
1012         }
1013         put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1014
1015 #ifdef CONFIG_MYRI10GE_DCA
1016         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_DCA_OFFSET, &cmd, 0);
1017         dca_tag_off = cmd.data0;
1018         for (i = 0; i < mgp->num_slices; i++) {
1019                 ss = &mgp->ss[i];
1020                 if (status == 0) {
1021                         ss->dca_tag = (__iomem __be32 *)
1022                             (mgp->sram + dca_tag_off + 4 * i);
1023                 } else {
1024                         ss->dca_tag = NULL;
1025                 }
1026         }
1027 #endif                          /* CONFIG_MYRI10GE_DCA */
1028
1029         /* reset mcp/driver shared state back to 0 */
1030
1031         mgp->link_changes = 0;
1032         for (i = 0; i < mgp->num_slices; i++) {
1033                 ss = &mgp->ss[i];
1034
1035                 memset(ss->rx_done.entry, 0, bytes);
1036                 ss->tx.req = 0;
1037                 ss->tx.done = 0;
1038                 ss->tx.pkt_start = 0;
1039                 ss->tx.pkt_done = 0;
1040                 ss->rx_big.cnt = 0;
1041                 ss->rx_small.cnt = 0;
1042                 ss->rx_done.idx = 0;
1043                 ss->rx_done.cnt = 0;
1044                 ss->tx.wake_queue = 0;
1045                 ss->tx.stop_queue = 0;
1046         }
1047
1048         status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr);
1049         myri10ge_change_pause(mgp, mgp->pause);
1050         myri10ge_set_multicast_list(mgp->dev);
1051         return status;
1052 }
1053
1054 #ifdef CONFIG_MYRI10GE_DCA
1055 static void
1056 myri10ge_write_dca(struct myri10ge_slice_state *ss, int cpu, int tag)
1057 {
1058         ss->cpu = cpu;
1059         ss->cached_dca_tag = tag;
1060         put_be32(htonl(tag), ss->dca_tag);
1061 }
1062
1063 static inline void myri10ge_update_dca(struct myri10ge_slice_state *ss)
1064 {
1065         int cpu = get_cpu();
1066         int tag;
1067
1068         if (cpu != ss->cpu) {
1069                 tag = dca_get_tag(cpu);
1070                 if (ss->cached_dca_tag != tag)
1071                         myri10ge_write_dca(ss, cpu, tag);
1072         }
1073         put_cpu();
1074 }
1075
1076 static void myri10ge_setup_dca(struct myri10ge_priv *mgp)
1077 {
1078         int err, i;
1079         struct pci_dev *pdev = mgp->pdev;
1080
1081         if (mgp->ss[0].dca_tag == NULL || mgp->dca_enabled)
1082                 return;
1083         if (!myri10ge_dca) {
1084                 dev_err(&pdev->dev, "dca disabled by administrator\n");
1085                 return;
1086         }
1087         err = dca_add_requester(&pdev->dev);
1088         if (err) {
1089                 if (err != -ENODEV)
1090                         dev_err(&pdev->dev,
1091                                 "dca_add_requester() failed, err=%d\n", err);
1092                 return;
1093         }
1094         mgp->dca_enabled = 1;
1095         for (i = 0; i < mgp->num_slices; i++)
1096                 myri10ge_write_dca(&mgp->ss[i], -1, 0);
1097 }
1098
1099 static void myri10ge_teardown_dca(struct myri10ge_priv *mgp)
1100 {
1101         struct pci_dev *pdev = mgp->pdev;
1102         int err;
1103
1104         if (!mgp->dca_enabled)
1105                 return;
1106         mgp->dca_enabled = 0;
1107         err = dca_remove_requester(&pdev->dev);
1108 }
1109
1110 static int myri10ge_notify_dca_device(struct device *dev, void *data)
1111 {
1112         struct myri10ge_priv *mgp;
1113         unsigned long event;
1114
1115         mgp = dev_get_drvdata(dev);
1116         event = *(unsigned long *)data;
1117
1118         if (event == DCA_PROVIDER_ADD)
1119                 myri10ge_setup_dca(mgp);
1120         else if (event == DCA_PROVIDER_REMOVE)
1121                 myri10ge_teardown_dca(mgp);
1122         return 0;
1123 }
1124 #endif                          /* CONFIG_MYRI10GE_DCA */
1125
1126 static inline void
1127 myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst,
1128                     struct mcp_kreq_ether_recv *src)
1129 {
1130         __be32 low;
1131
1132         low = src->addr_low;
1133         src->addr_low = htonl(DMA_BIT_MASK(32));
1134         myri10ge_pio_copy(dst, src, 4 * sizeof(*src));
1135         mb();
1136         myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src));
1137         mb();
1138         src->addr_low = low;
1139         put_be32(low, &dst->addr_low);
1140         mb();
1141 }
1142
1143 static inline void myri10ge_vlan_ip_csum(struct sk_buff *skb, __wsum hw_csum)
1144 {
1145         struct vlan_hdr *vh = (struct vlan_hdr *)(skb->data);
1146
1147         if ((skb->protocol == htons(ETH_P_8021Q)) &&
1148             (vh->h_vlan_encapsulated_proto == htons(ETH_P_IP) ||
1149              vh->h_vlan_encapsulated_proto == htons(ETH_P_IPV6))) {
1150                 skb->csum = hw_csum;
1151                 skb->ip_summed = CHECKSUM_COMPLETE;
1152         }
1153 }
1154
1155 static inline void
1156 myri10ge_rx_skb_build(struct sk_buff *skb, u8 * va,
1157                       struct skb_frag_struct *rx_frags, int len, int hlen)
1158 {
1159         struct skb_frag_struct *skb_frags;
1160
1161         skb->len = skb->data_len = len;
1162         skb->truesize = len + sizeof(struct sk_buff);
1163         /* attach the page(s) */
1164
1165         skb_frags = skb_shinfo(skb)->frags;
1166         while (len > 0) {
1167                 memcpy(skb_frags, rx_frags, sizeof(*skb_frags));
1168                 len -= rx_frags->size;
1169                 skb_frags++;
1170                 rx_frags++;
1171                 skb_shinfo(skb)->nr_frags++;
1172         }
1173
1174         /* pskb_may_pull is not available in irq context, but
1175          * skb_pull() (for ether_pad and eth_type_trans()) requires
1176          * the beginning of the packet in skb_headlen(), move it
1177          * manually */
1178         skb_copy_to_linear_data(skb, va, hlen);
1179         skb_shinfo(skb)->frags[0].page_offset += hlen;
1180         skb_shinfo(skb)->frags[0].size -= hlen;
1181         skb->data_len -= hlen;
1182         skb->tail += hlen;
1183         skb_pull(skb, MXGEFW_PAD);
1184 }
1185
1186 static void
1187 myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
1188                         int bytes, int watchdog)
1189 {
1190         struct page *page;
1191         int idx;
1192
1193         if (unlikely(rx->watchdog_needed && !watchdog))
1194                 return;
1195
1196         /* try to refill entire ring */
1197         while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) {
1198                 idx = rx->fill_cnt & rx->mask;
1199                 if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) {
1200                         /* we can use part of previous page */
1201                         get_page(rx->page);
1202                 } else {
1203                         /* we need a new page */
1204                         page =
1205                             alloc_pages(GFP_ATOMIC | __GFP_COMP,
1206                                         MYRI10GE_ALLOC_ORDER);
1207                         if (unlikely(page == NULL)) {
1208                                 if (rx->fill_cnt - rx->cnt < 16)
1209                                         rx->watchdog_needed = 1;
1210                                 return;
1211                         }
1212                         rx->page = page;
1213                         rx->page_offset = 0;
1214                         rx->bus = pci_map_page(mgp->pdev, page, 0,
1215                                                MYRI10GE_ALLOC_SIZE,
1216                                                PCI_DMA_FROMDEVICE);
1217                 }
1218                 rx->info[idx].page = rx->page;
1219                 rx->info[idx].page_offset = rx->page_offset;
1220                 /* note that this is the address of the start of the
1221                  * page */
1222                 pci_unmap_addr_set(&rx->info[idx], bus, rx->bus);
1223                 rx->shadow[idx].addr_low =
1224                     htonl(MYRI10GE_LOWPART_TO_U32(rx->bus) + rx->page_offset);
1225                 rx->shadow[idx].addr_high =
1226                     htonl(MYRI10GE_HIGHPART_TO_U32(rx->bus));
1227
1228                 /* start next packet on a cacheline boundary */
1229                 rx->page_offset += SKB_DATA_ALIGN(bytes);
1230
1231 #if MYRI10GE_ALLOC_SIZE > 4096
1232                 /* don't cross a 4KB boundary */
1233                 if ((rx->page_offset >> 12) !=
1234                     ((rx->page_offset + bytes - 1) >> 12))
1235                         rx->page_offset = (rx->page_offset + 4096) & ~4095;
1236 #endif
1237                 rx->fill_cnt++;
1238
1239                 /* copy 8 descriptors to the firmware at a time */
1240                 if ((idx & 7) == 7) {
1241                         myri10ge_submit_8rx(&rx->lanai[idx - 7],
1242                                             &rx->shadow[idx - 7]);
1243                 }
1244         }
1245 }
1246
1247 static inline void
1248 myri10ge_unmap_rx_page(struct pci_dev *pdev,
1249                        struct myri10ge_rx_buffer_state *info, int bytes)
1250 {
1251         /* unmap the recvd page if we're the only or last user of it */
1252         if (bytes >= MYRI10GE_ALLOC_SIZE / 2 ||
1253             (info->page_offset + 2 * bytes) > MYRI10GE_ALLOC_SIZE) {
1254                 pci_unmap_page(pdev, (pci_unmap_addr(info, bus)
1255                                       & ~(MYRI10GE_ALLOC_SIZE - 1)),
1256                                MYRI10GE_ALLOC_SIZE, PCI_DMA_FROMDEVICE);
1257         }
1258 }
1259
1260 #define MYRI10GE_HLEN 64        /* The number of bytes to copy from a
1261                                  * page into an skb */
1262
1263 static inline int
1264 myri10ge_rx_done(struct myri10ge_slice_state *ss, struct myri10ge_rx_buf *rx,
1265                  int bytes, int len, __wsum csum)
1266 {
1267         struct myri10ge_priv *mgp = ss->mgp;
1268         struct sk_buff *skb;
1269         struct skb_frag_struct rx_frags[MYRI10GE_MAX_FRAGS_PER_FRAME];
1270         int i, idx, hlen, remainder;
1271         struct pci_dev *pdev = mgp->pdev;
1272         struct net_device *dev = mgp->dev;
1273         u8 *va;
1274
1275         len += MXGEFW_PAD;
1276         idx = rx->cnt & rx->mask;
1277         va = page_address(rx->info[idx].page) + rx->info[idx].page_offset;
1278         prefetch(va);
1279         /* Fill skb_frag_struct(s) with data from our receive */
1280         for (i = 0, remainder = len; remainder > 0; i++) {
1281                 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1282                 rx_frags[i].page = rx->info[idx].page;
1283                 rx_frags[i].page_offset = rx->info[idx].page_offset;
1284                 if (remainder < MYRI10GE_ALLOC_SIZE)
1285                         rx_frags[i].size = remainder;
1286                 else
1287                         rx_frags[i].size = MYRI10GE_ALLOC_SIZE;
1288                 rx->cnt++;
1289                 idx = rx->cnt & rx->mask;
1290                 remainder -= MYRI10GE_ALLOC_SIZE;
1291         }
1292
1293         if (mgp->csum_flag && myri10ge_lro) {
1294                 rx_frags[0].page_offset += MXGEFW_PAD;
1295                 rx_frags[0].size -= MXGEFW_PAD;
1296                 len -= MXGEFW_PAD;
1297                 lro_receive_frags(&ss->rx_done.lro_mgr, rx_frags,
1298                                   /* opaque, will come back in get_frag_header */
1299                                   len, len,
1300                                   (void *)(__force unsigned long)csum, csum);
1301
1302                 return 1;
1303         }
1304
1305         hlen = MYRI10GE_HLEN > len ? len : MYRI10GE_HLEN;
1306
1307         /* allocate an skb to attach the page(s) to. This is done
1308          * after trying LRO, so as to avoid skb allocation overheads */
1309
1310         skb = netdev_alloc_skb(dev, MYRI10GE_HLEN + 16);
1311         if (unlikely(skb == NULL)) {
1312                 ss->stats.rx_dropped++;
1313                 do {
1314                         i--;
1315                         put_page(rx_frags[i].page);
1316                 } while (i != 0);
1317                 return 0;
1318         }
1319
1320         /* Attach the pages to the skb, and trim off any padding */
1321         myri10ge_rx_skb_build(skb, va, rx_frags, len, hlen);
1322         if (skb_shinfo(skb)->frags[0].size <= 0) {
1323                 put_page(skb_shinfo(skb)->frags[0].page);
1324                 skb_shinfo(skb)->nr_frags = 0;
1325         }
1326         skb->protocol = eth_type_trans(skb, dev);
1327         skb_record_rx_queue(skb, ss - &mgp->ss[0]);
1328
1329         if (mgp->csum_flag) {
1330                 if ((skb->protocol == htons(ETH_P_IP)) ||
1331                     (skb->protocol == htons(ETH_P_IPV6))) {
1332                         skb->csum = csum;
1333                         skb->ip_summed = CHECKSUM_COMPLETE;
1334                 } else
1335                         myri10ge_vlan_ip_csum(skb, csum);
1336         }
1337         netif_receive_skb(skb);
1338         return 1;
1339 }
1340
1341 static inline void
1342 myri10ge_tx_done(struct myri10ge_slice_state *ss, int mcp_index)
1343 {
1344         struct pci_dev *pdev = ss->mgp->pdev;
1345         struct myri10ge_tx_buf *tx = &ss->tx;
1346         struct netdev_queue *dev_queue;
1347         struct sk_buff *skb;
1348         int idx, len;
1349
1350         while (tx->pkt_done != mcp_index) {
1351                 idx = tx->done & tx->mask;
1352                 skb = tx->info[idx].skb;
1353
1354                 /* Mark as free */
1355                 tx->info[idx].skb = NULL;
1356                 if (tx->info[idx].last) {
1357                         tx->pkt_done++;
1358                         tx->info[idx].last = 0;
1359                 }
1360                 tx->done++;
1361                 len = pci_unmap_len(&tx->info[idx], len);
1362                 pci_unmap_len_set(&tx->info[idx], len, 0);
1363                 if (skb) {
1364                         ss->stats.tx_bytes += skb->len;
1365                         ss->stats.tx_packets++;
1366                         dev_kfree_skb_irq(skb);
1367                         if (len)
1368                                 pci_unmap_single(pdev,
1369                                                  pci_unmap_addr(&tx->info[idx],
1370                                                                 bus), len,
1371                                                  PCI_DMA_TODEVICE);
1372                 } else {
1373                         if (len)
1374                                 pci_unmap_page(pdev,
1375                                                pci_unmap_addr(&tx->info[idx],
1376                                                               bus), len,
1377                                                PCI_DMA_TODEVICE);
1378                 }
1379         }
1380
1381         dev_queue = netdev_get_tx_queue(ss->dev, ss - ss->mgp->ss);
1382         /*
1383          * Make a minimal effort to prevent the NIC from polling an
1384          * idle tx queue.  If we can't get the lock we leave the queue
1385          * active. In this case, either a thread was about to start
1386          * using the queue anyway, or we lost a race and the NIC will
1387          * waste some of its resources polling an inactive queue for a
1388          * while.
1389          */
1390
1391         if ((ss->mgp->dev->real_num_tx_queues > 1) &&
1392             __netif_tx_trylock(dev_queue)) {
1393                 if (tx->req == tx->done) {
1394                         tx->queue_active = 0;
1395                         put_be32(htonl(1), tx->send_stop);
1396                         mb();
1397                         mmiowb();
1398                 }
1399                 __netif_tx_unlock(dev_queue);
1400         }
1401
1402         /* start the queue if we've stopped it */
1403         if (netif_tx_queue_stopped(dev_queue)
1404             && tx->req - tx->done < (tx->mask >> 1)) {
1405                 tx->wake_queue++;
1406                 netif_tx_wake_queue(dev_queue);
1407         }
1408 }
1409
1410 static inline int
1411 myri10ge_clean_rx_done(struct myri10ge_slice_state *ss, int budget)
1412 {
1413         struct myri10ge_rx_done *rx_done = &ss->rx_done;
1414         struct myri10ge_priv *mgp = ss->mgp;
1415         unsigned long rx_bytes = 0;
1416         unsigned long rx_packets = 0;
1417         unsigned long rx_ok;
1418
1419         int idx = rx_done->idx;
1420         int cnt = rx_done->cnt;
1421         int work_done = 0;
1422         u16 length;
1423         __wsum checksum;
1424
1425         while (rx_done->entry[idx].length != 0 && work_done < budget) {
1426                 length = ntohs(rx_done->entry[idx].length);
1427                 rx_done->entry[idx].length = 0;
1428                 checksum = csum_unfold(rx_done->entry[idx].checksum);
1429                 if (length <= mgp->small_bytes)
1430                         rx_ok = myri10ge_rx_done(ss, &ss->rx_small,
1431                                                  mgp->small_bytes,
1432                                                  length, checksum);
1433                 else
1434                         rx_ok = myri10ge_rx_done(ss, &ss->rx_big,
1435                                                  mgp->big_bytes,
1436                                                  length, checksum);
1437                 rx_packets += rx_ok;
1438                 rx_bytes += rx_ok * (unsigned long)length;
1439                 cnt++;
1440                 idx = cnt & (mgp->max_intr_slots - 1);
1441                 work_done++;
1442         }
1443         rx_done->idx = idx;
1444         rx_done->cnt = cnt;
1445         ss->stats.rx_packets += rx_packets;
1446         ss->stats.rx_bytes += rx_bytes;
1447
1448         if (myri10ge_lro)
1449                 lro_flush_all(&rx_done->lro_mgr);
1450
1451         /* restock receive rings if needed */
1452         if (ss->rx_small.fill_cnt - ss->rx_small.cnt < myri10ge_fill_thresh)
1453                 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
1454                                         mgp->small_bytes + MXGEFW_PAD, 0);
1455         if (ss->rx_big.fill_cnt - ss->rx_big.cnt < myri10ge_fill_thresh)
1456                 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
1457
1458         return work_done;
1459 }
1460
1461 static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
1462 {
1463         struct mcp_irq_data *stats = mgp->ss[0].fw_stats;
1464
1465         if (unlikely(stats->stats_updated)) {
1466                 unsigned link_up = ntohl(stats->link_up);
1467                 if (mgp->link_state != link_up) {
1468                         mgp->link_state = link_up;
1469
1470                         if (mgp->link_state == MXGEFW_LINK_UP) {
1471                                 if (netif_msg_link(mgp))
1472                                         printk(KERN_INFO
1473                                                "myri10ge: %s: link up\n",
1474                                                mgp->dev->name);
1475                                 netif_carrier_on(mgp->dev);
1476                                 mgp->link_changes++;
1477                         } else {
1478                                 if (netif_msg_link(mgp))
1479                                         printk(KERN_INFO
1480                                                "myri10ge: %s: link %s\n",
1481                                                mgp->dev->name,
1482                                                (link_up == MXGEFW_LINK_MYRINET ?
1483                                                 "mismatch (Myrinet detected)" :
1484                                                 "down"));
1485                                 netif_carrier_off(mgp->dev);
1486                                 mgp->link_changes++;
1487                         }
1488                 }
1489                 if (mgp->rdma_tags_available !=
1490                     ntohl(stats->rdma_tags_available)) {
1491                         mgp->rdma_tags_available =
1492                             ntohl(stats->rdma_tags_available);
1493                         printk(KERN_WARNING "myri10ge: %s: RDMA timed out! "
1494                                "%d tags left\n", mgp->dev->name,
1495                                mgp->rdma_tags_available);
1496                 }
1497                 mgp->down_cnt += stats->link_down;
1498                 if (stats->link_down)
1499                         wake_up(&mgp->down_wq);
1500         }
1501 }
1502
1503 static int myri10ge_poll(struct napi_struct *napi, int budget)
1504 {
1505         struct myri10ge_slice_state *ss =
1506             container_of(napi, struct myri10ge_slice_state, napi);
1507         int work_done;
1508
1509 #ifdef CONFIG_MYRI10GE_DCA
1510         if (ss->mgp->dca_enabled)
1511                 myri10ge_update_dca(ss);
1512 #endif
1513
1514         /* process as many rx events as NAPI will allow */
1515         work_done = myri10ge_clean_rx_done(ss, budget);
1516
1517         if (work_done < budget) {
1518                 napi_complete(napi);
1519                 put_be32(htonl(3), ss->irq_claim);
1520         }
1521         return work_done;
1522 }
1523
1524 static irqreturn_t myri10ge_intr(int irq, void *arg)
1525 {
1526         struct myri10ge_slice_state *ss = arg;
1527         struct myri10ge_priv *mgp = ss->mgp;
1528         struct mcp_irq_data *stats = ss->fw_stats;
1529         struct myri10ge_tx_buf *tx = &ss->tx;
1530         u32 send_done_count;
1531         int i;
1532
1533         /* an interrupt on a non-zero receive-only slice is implicitly
1534          * valid  since MSI-X irqs are not shared */
1535         if ((mgp->dev->real_num_tx_queues == 1) && (ss != mgp->ss)) {
1536                 napi_schedule(&ss->napi);
1537                 return (IRQ_HANDLED);
1538         }
1539
1540         /* make sure it is our IRQ, and that the DMA has finished */
1541         if (unlikely(!stats->valid))
1542                 return (IRQ_NONE);
1543
1544         /* low bit indicates receives are present, so schedule
1545          * napi poll handler */
1546         if (stats->valid & 1)
1547                 napi_schedule(&ss->napi);
1548
1549         if (!mgp->msi_enabled && !mgp->msix_enabled) {
1550                 put_be32(0, mgp->irq_deassert);
1551                 if (!myri10ge_deassert_wait)
1552                         stats->valid = 0;
1553                 mb();
1554         } else
1555                 stats->valid = 0;
1556
1557         /* Wait for IRQ line to go low, if using INTx */
1558         i = 0;
1559         while (1) {
1560                 i++;
1561                 /* check for transmit completes and receives */
1562                 send_done_count = ntohl(stats->send_done_count);
1563                 if (send_done_count != tx->pkt_done)
1564                         myri10ge_tx_done(ss, (int)send_done_count);
1565                 if (unlikely(i > myri10ge_max_irq_loops)) {
1566                         printk(KERN_WARNING "myri10ge: %s: irq stuck?\n",
1567                                mgp->dev->name);
1568                         stats->valid = 0;
1569                         schedule_work(&mgp->watchdog_work);
1570                 }
1571                 if (likely(stats->valid == 0))
1572                         break;
1573                 cpu_relax();
1574                 barrier();
1575         }
1576
1577         /* Only slice 0 updates stats */
1578         if (ss == mgp->ss)
1579                 myri10ge_check_statblock(mgp);
1580
1581         put_be32(htonl(3), ss->irq_claim + 1);
1582         return (IRQ_HANDLED);
1583 }
1584
1585 static int
1586 myri10ge_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
1587 {
1588         struct myri10ge_priv *mgp = netdev_priv(netdev);
1589         char *ptr;
1590         int i;
1591
1592         cmd->autoneg = AUTONEG_DISABLE;
1593         cmd->speed = SPEED_10000;
1594         cmd->duplex = DUPLEX_FULL;
1595
1596         /*
1597          * parse the product code to deterimine the interface type
1598          * (CX4, XFP, Quad Ribbon Fiber) by looking at the character
1599          * after the 3rd dash in the driver's cached copy of the
1600          * EEPROM's product code string.
1601          */
1602         ptr = mgp->product_code_string;
1603         if (ptr == NULL) {
1604                 printk(KERN_ERR "myri10ge: %s: Missing product code\n",
1605                        netdev->name);
1606                 return 0;
1607         }
1608         for (i = 0; i < 3; i++, ptr++) {
1609                 ptr = strchr(ptr, '-');
1610                 if (ptr == NULL) {
1611                         printk(KERN_ERR "myri10ge: %s: Invalid product "
1612                                "code %s\n", netdev->name,
1613                                mgp->product_code_string);
1614                         return 0;
1615                 }
1616         }
1617         if (*ptr == 'R' || *ptr == 'Q') {
1618                 /* We've found either an XFP or quad ribbon fiber */
1619                 cmd->port = PORT_FIBRE;
1620         }
1621         return 0;
1622 }
1623
1624 static void
1625 myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
1626 {
1627         struct myri10ge_priv *mgp = netdev_priv(netdev);
1628
1629         strlcpy(info->driver, "myri10ge", sizeof(info->driver));
1630         strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version));
1631         strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version));
1632         strlcpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info));
1633 }
1634
1635 static int
1636 myri10ge_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1637 {
1638         struct myri10ge_priv *mgp = netdev_priv(netdev);
1639
1640         coal->rx_coalesce_usecs = mgp->intr_coal_delay;
1641         return 0;
1642 }
1643
1644 static int
1645 myri10ge_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1646 {
1647         struct myri10ge_priv *mgp = netdev_priv(netdev);
1648
1649         mgp->intr_coal_delay = coal->rx_coalesce_usecs;
1650         put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1651         return 0;
1652 }
1653
1654 static void
1655 myri10ge_get_pauseparam(struct net_device *netdev,
1656                         struct ethtool_pauseparam *pause)
1657 {
1658         struct myri10ge_priv *mgp = netdev_priv(netdev);
1659
1660         pause->autoneg = 0;
1661         pause->rx_pause = mgp->pause;
1662         pause->tx_pause = mgp->pause;
1663 }
1664
1665 static int
1666 myri10ge_set_pauseparam(struct net_device *netdev,
1667                         struct ethtool_pauseparam *pause)
1668 {
1669         struct myri10ge_priv *mgp = netdev_priv(netdev);
1670
1671         if (pause->tx_pause != mgp->pause)
1672                 return myri10ge_change_pause(mgp, pause->tx_pause);
1673         if (pause->rx_pause != mgp->pause)
1674                 return myri10ge_change_pause(mgp, pause->tx_pause);
1675         if (pause->autoneg != 0)
1676                 return -EINVAL;
1677         return 0;
1678 }
1679
1680 static void
1681 myri10ge_get_ringparam(struct net_device *netdev,
1682                        struct ethtool_ringparam *ring)
1683 {
1684         struct myri10ge_priv *mgp = netdev_priv(netdev);
1685
1686         ring->rx_mini_max_pending = mgp->ss[0].rx_small.mask + 1;
1687         ring->rx_max_pending = mgp->ss[0].rx_big.mask + 1;
1688         ring->rx_jumbo_max_pending = 0;
1689         ring->tx_max_pending = mgp->ss[0].rx_small.mask + 1;
1690         ring->rx_mini_pending = ring->rx_mini_max_pending;
1691         ring->rx_pending = ring->rx_max_pending;
1692         ring->rx_jumbo_pending = ring->rx_jumbo_max_pending;
1693         ring->tx_pending = ring->tx_max_pending;
1694 }
1695
1696 static u32 myri10ge_get_rx_csum(struct net_device *netdev)
1697 {
1698         struct myri10ge_priv *mgp = netdev_priv(netdev);
1699
1700         if (mgp->csum_flag)
1701                 return 1;
1702         else
1703                 return 0;
1704 }
1705
1706 static int myri10ge_set_rx_csum(struct net_device *netdev, u32 csum_enabled)
1707 {
1708         struct myri10ge_priv *mgp = netdev_priv(netdev);
1709
1710         if (csum_enabled)
1711                 mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
1712         else
1713                 mgp->csum_flag = 0;
1714         return 0;
1715 }
1716
1717 static int myri10ge_set_tso(struct net_device *netdev, u32 tso_enabled)
1718 {
1719         struct myri10ge_priv *mgp = netdev_priv(netdev);
1720         unsigned long flags = mgp->features & (NETIF_F_TSO6 | NETIF_F_TSO);
1721
1722         if (tso_enabled)
1723                 netdev->features |= flags;
1724         else
1725                 netdev->features &= ~flags;
1726         return 0;
1727 }
1728
1729 static const char myri10ge_gstrings_main_stats[][ETH_GSTRING_LEN] = {
1730         "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
1731         "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
1732         "rx_length_errors", "rx_over_errors", "rx_crc_errors",
1733         "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
1734         "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
1735         "tx_heartbeat_errors", "tx_window_errors",
1736         /* device-specific stats */
1737         "tx_boundary", "WC", "irq", "MSI", "MSIX",
1738         "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
1739         "serial_number", "watchdog_resets",
1740 #ifdef CONFIG_MYRI10GE_DCA
1741         "dca_capable_firmware", "dca_device_present",
1742 #endif
1743         "link_changes", "link_up", "dropped_link_overflow",
1744         "dropped_link_error_or_filtered",
1745         "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32",
1746         "dropped_unicast_filtered", "dropped_multicast_filtered",
1747         "dropped_runt", "dropped_overrun", "dropped_no_small_buffer",
1748         "dropped_no_big_buffer"
1749 };
1750
1751 static const char myri10ge_gstrings_slice_stats[][ETH_GSTRING_LEN] = {
1752         "----------- slice ---------",
1753         "tx_pkt_start", "tx_pkt_done", "tx_req", "tx_done",
1754         "rx_small_cnt", "rx_big_cnt",
1755         "wake_queue", "stop_queue", "tx_linearized", "LRO aggregated",
1756             "LRO flushed",
1757         "LRO avg aggr", "LRO no_desc"
1758 };
1759
1760 #define MYRI10GE_NET_STATS_LEN      21
1761 #define MYRI10GE_MAIN_STATS_LEN  ARRAY_SIZE(myri10ge_gstrings_main_stats)
1762 #define MYRI10GE_SLICE_STATS_LEN  ARRAY_SIZE(myri10ge_gstrings_slice_stats)
1763
1764 static void
1765 myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
1766 {
1767         struct myri10ge_priv *mgp = netdev_priv(netdev);
1768         int i;
1769
1770         switch (stringset) {
1771         case ETH_SS_STATS:
1772                 memcpy(data, *myri10ge_gstrings_main_stats,
1773                        sizeof(myri10ge_gstrings_main_stats));
1774                 data += sizeof(myri10ge_gstrings_main_stats);
1775                 for (i = 0; i < mgp->num_slices; i++) {
1776                         memcpy(data, *myri10ge_gstrings_slice_stats,
1777                                sizeof(myri10ge_gstrings_slice_stats));
1778                         data += sizeof(myri10ge_gstrings_slice_stats);
1779                 }
1780                 break;
1781         }
1782 }
1783
1784 static int myri10ge_get_sset_count(struct net_device *netdev, int sset)
1785 {
1786         struct myri10ge_priv *mgp = netdev_priv(netdev);
1787
1788         switch (sset) {
1789         case ETH_SS_STATS:
1790                 return MYRI10GE_MAIN_STATS_LEN +
1791                     mgp->num_slices * MYRI10GE_SLICE_STATS_LEN;
1792         default:
1793                 return -EOPNOTSUPP;
1794         }
1795 }
1796
1797 static void
1798 myri10ge_get_ethtool_stats(struct net_device *netdev,
1799                            struct ethtool_stats *stats, u64 * data)
1800 {
1801         struct myri10ge_priv *mgp = netdev_priv(netdev);
1802         struct myri10ge_slice_state *ss;
1803         int slice;
1804         int i;
1805
1806         for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++)
1807                 data[i] = ((unsigned long *)&mgp->stats)[i];
1808
1809         data[i++] = (unsigned int)mgp->tx_boundary;
1810         data[i++] = (unsigned int)mgp->wc_enabled;
1811         data[i++] = (unsigned int)mgp->pdev->irq;
1812         data[i++] = (unsigned int)mgp->msi_enabled;
1813         data[i++] = (unsigned int)mgp->msix_enabled;
1814         data[i++] = (unsigned int)mgp->read_dma;
1815         data[i++] = (unsigned int)mgp->write_dma;
1816         data[i++] = (unsigned int)mgp->read_write_dma;
1817         data[i++] = (unsigned int)mgp->serial_number;
1818         data[i++] = (unsigned int)mgp->watchdog_resets;
1819 #ifdef CONFIG_MYRI10GE_DCA
1820         data[i++] = (unsigned int)(mgp->ss[0].dca_tag != NULL);
1821         data[i++] = (unsigned int)(mgp->dca_enabled);
1822 #endif
1823         data[i++] = (unsigned int)mgp->link_changes;
1824
1825         /* firmware stats are useful only in the first slice */
1826         ss = &mgp->ss[0];
1827         data[i++] = (unsigned int)ntohl(ss->fw_stats->link_up);
1828         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_link_overflow);
1829         data[i++] =
1830             (unsigned int)ntohl(ss->fw_stats->dropped_link_error_or_filtered);
1831         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_pause);
1832         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_phy);
1833         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_crc32);
1834         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_unicast_filtered);
1835         data[i++] =
1836             (unsigned int)ntohl(ss->fw_stats->dropped_multicast_filtered);
1837         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_runt);
1838         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_overrun);
1839         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_small_buffer);
1840         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_big_buffer);
1841
1842         for (slice = 0; slice < mgp->num_slices; slice++) {
1843                 ss = &mgp->ss[slice];
1844                 data[i++] = slice;
1845                 data[i++] = (unsigned int)ss->tx.pkt_start;
1846                 data[i++] = (unsigned int)ss->tx.pkt_done;
1847                 data[i++] = (unsigned int)ss->tx.req;
1848                 data[i++] = (unsigned int)ss->tx.done;
1849                 data[i++] = (unsigned int)ss->rx_small.cnt;
1850                 data[i++] = (unsigned int)ss->rx_big.cnt;
1851                 data[i++] = (unsigned int)ss->tx.wake_queue;
1852                 data[i++] = (unsigned int)ss->tx.stop_queue;
1853                 data[i++] = (unsigned int)ss->tx.linearized;
1854                 data[i++] = ss->rx_done.lro_mgr.stats.aggregated;
1855                 data[i++] = ss->rx_done.lro_mgr.stats.flushed;
1856                 if (ss->rx_done.lro_mgr.stats.flushed)
1857                         data[i++] = ss->rx_done.lro_mgr.stats.aggregated /
1858                             ss->rx_done.lro_mgr.stats.flushed;
1859                 else
1860                         data[i++] = 0;
1861                 data[i++] = ss->rx_done.lro_mgr.stats.no_desc;
1862         }
1863 }
1864
1865 static void myri10ge_set_msglevel(struct net_device *netdev, u32 value)
1866 {
1867         struct myri10ge_priv *mgp = netdev_priv(netdev);
1868         mgp->msg_enable = value;
1869 }
1870
1871 static u32 myri10ge_get_msglevel(struct net_device *netdev)
1872 {
1873         struct myri10ge_priv *mgp = netdev_priv(netdev);
1874         return mgp->msg_enable;
1875 }
1876
1877 static const struct ethtool_ops myri10ge_ethtool_ops = {
1878         .get_settings = myri10ge_get_settings,
1879         .get_drvinfo = myri10ge_get_drvinfo,
1880         .get_coalesce = myri10ge_get_coalesce,
1881         .set_coalesce = myri10ge_set_coalesce,
1882         .get_pauseparam = myri10ge_get_pauseparam,
1883         .set_pauseparam = myri10ge_set_pauseparam,
1884         .get_ringparam = myri10ge_get_ringparam,
1885         .get_rx_csum = myri10ge_get_rx_csum,
1886         .set_rx_csum = myri10ge_set_rx_csum,
1887         .set_tx_csum = ethtool_op_set_tx_hw_csum,
1888         .set_sg = ethtool_op_set_sg,
1889         .set_tso = myri10ge_set_tso,
1890         .get_link = ethtool_op_get_link,
1891         .get_strings = myri10ge_get_strings,
1892         .get_sset_count = myri10ge_get_sset_count,
1893         .get_ethtool_stats = myri10ge_get_ethtool_stats,
1894         .set_msglevel = myri10ge_set_msglevel,
1895         .get_msglevel = myri10ge_get_msglevel
1896 };
1897
1898 static int myri10ge_allocate_rings(struct myri10ge_slice_state *ss)
1899 {
1900         struct myri10ge_priv *mgp = ss->mgp;
1901         struct myri10ge_cmd cmd;
1902         struct net_device *dev = mgp->dev;
1903         int tx_ring_size, rx_ring_size;
1904         int tx_ring_entries, rx_ring_entries;
1905         int i, slice, status;
1906         size_t bytes;
1907
1908         /* get ring sizes */
1909         slice = ss - mgp->ss;
1910         cmd.data0 = slice;
1911         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0);
1912         tx_ring_size = cmd.data0;
1913         cmd.data0 = slice;
1914         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
1915         if (status != 0)
1916                 return status;
1917         rx_ring_size = cmd.data0;
1918
1919         tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send);
1920         rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr);
1921         ss->tx.mask = tx_ring_entries - 1;
1922         ss->rx_small.mask = ss->rx_big.mask = rx_ring_entries - 1;
1923
1924         status = -ENOMEM;
1925
1926         /* allocate the host shadow rings */
1927
1928         bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4)
1929             * sizeof(*ss->tx.req_list);
1930         ss->tx.req_bytes = kzalloc(bytes, GFP_KERNEL);
1931         if (ss->tx.req_bytes == NULL)
1932                 goto abort_with_nothing;
1933
1934         /* ensure req_list entries are aligned to 8 bytes */
1935         ss->tx.req_list = (struct mcp_kreq_ether_send *)
1936             ALIGN((unsigned long)ss->tx.req_bytes, 8);
1937         ss->tx.queue_active = 0;
1938
1939         bytes = rx_ring_entries * sizeof(*ss->rx_small.shadow);
1940         ss->rx_small.shadow = kzalloc(bytes, GFP_KERNEL);
1941         if (ss->rx_small.shadow == NULL)
1942                 goto abort_with_tx_req_bytes;
1943
1944         bytes = rx_ring_entries * sizeof(*ss->rx_big.shadow);
1945         ss->rx_big.shadow = kzalloc(bytes, GFP_KERNEL);
1946         if (ss->rx_big.shadow == NULL)
1947                 goto abort_with_rx_small_shadow;
1948
1949         /* allocate the host info rings */
1950
1951         bytes = tx_ring_entries * sizeof(*ss->tx.info);
1952         ss->tx.info = kzalloc(bytes, GFP_KERNEL);
1953         if (ss->tx.info == NULL)
1954                 goto abort_with_rx_big_shadow;
1955
1956         bytes = rx_ring_entries * sizeof(*ss->rx_small.info);
1957         ss->rx_small.info = kzalloc(bytes, GFP_KERNEL);
1958         if (ss->rx_small.info == NULL)
1959                 goto abort_with_tx_info;
1960
1961         bytes = rx_ring_entries * sizeof(*ss->rx_big.info);
1962         ss->rx_big.info = kzalloc(bytes, GFP_KERNEL);
1963         if (ss->rx_big.info == NULL)
1964                 goto abort_with_rx_small_info;
1965
1966         /* Fill the receive rings */
1967         ss->rx_big.cnt = 0;
1968         ss->rx_small.cnt = 0;
1969         ss->rx_big.fill_cnt = 0;
1970         ss->rx_small.fill_cnt = 0;
1971         ss->rx_small.page_offset = MYRI10GE_ALLOC_SIZE;
1972         ss->rx_big.page_offset = MYRI10GE_ALLOC_SIZE;
1973         ss->rx_small.watchdog_needed = 0;
1974         ss->rx_big.watchdog_needed = 0;
1975         myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
1976                                 mgp->small_bytes + MXGEFW_PAD, 0);
1977
1978         if (ss->rx_small.fill_cnt < ss->rx_small.mask + 1) {
1979                 printk(KERN_ERR
1980                        "myri10ge: %s:slice-%d: alloced only %d small bufs\n",
1981                        dev->name, slice, ss->rx_small.fill_cnt);
1982                 goto abort_with_rx_small_ring;
1983         }
1984
1985         myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
1986         if (ss->rx_big.fill_cnt < ss->rx_big.mask + 1) {
1987                 printk(KERN_ERR
1988                        "myri10ge: %s:slice-%d: alloced only %d big bufs\n",
1989                        dev->name, slice, ss->rx_big.fill_cnt);
1990                 goto abort_with_rx_big_ring;
1991         }
1992
1993         return 0;
1994
1995 abort_with_rx_big_ring:
1996         for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
1997                 int idx = i & ss->rx_big.mask;
1998                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
1999                                        mgp->big_bytes);
2000                 put_page(ss->rx_big.info[idx].page);
2001         }
2002
2003 abort_with_rx_small_ring:
2004         for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2005                 int idx = i & ss->rx_small.mask;
2006                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2007                                        mgp->small_bytes + MXGEFW_PAD);
2008                 put_page(ss->rx_small.info[idx].page);
2009         }
2010
2011         kfree(ss->rx_big.info);
2012
2013 abort_with_rx_small_info:
2014         kfree(ss->rx_small.info);
2015
2016 abort_with_tx_info:
2017         kfree(ss->tx.info);
2018
2019 abort_with_rx_big_shadow:
2020         kfree(ss->rx_big.shadow);
2021
2022 abort_with_rx_small_shadow:
2023         kfree(ss->rx_small.shadow);
2024
2025 abort_with_tx_req_bytes:
2026         kfree(ss->tx.req_bytes);
2027         ss->tx.req_bytes = NULL;
2028         ss->tx.req_list = NULL;
2029
2030 abort_with_nothing:
2031         return status;
2032 }
2033
2034 static void myri10ge_free_rings(struct myri10ge_slice_state *ss)
2035 {
2036         struct myri10ge_priv *mgp = ss->mgp;
2037         struct sk_buff *skb;
2038         struct myri10ge_tx_buf *tx;
2039         int i, len, idx;
2040
2041         /* If not allocated, skip it */
2042         if (ss->tx.req_list == NULL)
2043                 return;
2044
2045         for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2046                 idx = i & ss->rx_big.mask;
2047                 if (i == ss->rx_big.fill_cnt - 1)
2048                         ss->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE;
2049                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2050                                        mgp->big_bytes);
2051                 put_page(ss->rx_big.info[idx].page);
2052         }
2053
2054         for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2055                 idx = i & ss->rx_small.mask;
2056                 if (i == ss->rx_small.fill_cnt - 1)
2057                         ss->rx_small.info[idx].page_offset =
2058                             MYRI10GE_ALLOC_SIZE;
2059                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2060                                        mgp->small_bytes + MXGEFW_PAD);
2061                 put_page(ss->rx_small.info[idx].page);
2062         }
2063         tx = &ss->tx;
2064         while (tx->done != tx->req) {
2065                 idx = tx->done & tx->mask;
2066                 skb = tx->info[idx].skb;
2067
2068                 /* Mark as free */
2069                 tx->info[idx].skb = NULL;
2070                 tx->done++;
2071                 len = pci_unmap_len(&tx->info[idx], len);
2072                 pci_unmap_len_set(&tx->info[idx], len, 0);
2073                 if (skb) {
2074                         ss->stats.tx_dropped++;
2075                         dev_kfree_skb_any(skb);
2076                         if (len)
2077                                 pci_unmap_single(mgp->pdev,
2078                                                  pci_unmap_addr(&tx->info[idx],
2079                                                                 bus), len,
2080                                                  PCI_DMA_TODEVICE);
2081                 } else {
2082                         if (len)
2083                                 pci_unmap_page(mgp->pdev,
2084                                                pci_unmap_addr(&tx->info[idx],
2085                                                               bus), len,
2086                                                PCI_DMA_TODEVICE);
2087                 }
2088         }
2089         kfree(ss->rx_big.info);
2090
2091         kfree(ss->rx_small.info);
2092
2093         kfree(ss->tx.info);
2094
2095         kfree(ss->rx_big.shadow);
2096
2097         kfree(ss->rx_small.shadow);
2098
2099         kfree(ss->tx.req_bytes);
2100         ss->tx.req_bytes = NULL;
2101         ss->tx.req_list = NULL;
2102 }
2103
2104 static int myri10ge_request_irq(struct myri10ge_priv *mgp)
2105 {
2106         struct pci_dev *pdev = mgp->pdev;
2107         struct myri10ge_slice_state *ss;
2108         struct net_device *netdev = mgp->dev;
2109         int i;
2110         int status;
2111
2112         mgp->msi_enabled = 0;
2113         mgp->msix_enabled = 0;
2114         status = 0;
2115         if (myri10ge_msi) {
2116                 if (mgp->num_slices > 1) {
2117                         status =
2118                             pci_enable_msix(pdev, mgp->msix_vectors,
2119                                             mgp->num_slices);
2120                         if (status == 0) {
2121                                 mgp->msix_enabled = 1;
2122                         } else {
2123                                 dev_err(&pdev->dev,
2124                                         "Error %d setting up MSI-X\n", status);
2125                                 return status;
2126                         }
2127                 }
2128                 if (mgp->msix_enabled == 0) {
2129                         status = pci_enable_msi(pdev);
2130                         if (status != 0) {
2131                                 dev_err(&pdev->dev,
2132                                         "Error %d setting up MSI; falling back to xPIC\n",
2133                                         status);
2134                         } else {
2135                                 mgp->msi_enabled = 1;
2136                         }
2137                 }
2138         }
2139         if (mgp->msix_enabled) {
2140                 for (i = 0; i < mgp->num_slices; i++) {
2141                         ss = &mgp->ss[i];
2142                         snprintf(ss->irq_desc, sizeof(ss->irq_desc),
2143                                  "%s:slice-%d", netdev->name, i);
2144                         status = request_irq(mgp->msix_vectors[i].vector,
2145                                              myri10ge_intr, 0, ss->irq_desc,
2146                                              ss);
2147                         if (status != 0) {
2148                                 dev_err(&pdev->dev,
2149                                         "slice %d failed to allocate IRQ\n", i);
2150                                 i--;
2151                                 while (i >= 0) {
2152                                         free_irq(mgp->msix_vectors[i].vector,
2153                                                  &mgp->ss[i]);
2154                                         i--;
2155                                 }
2156                                 pci_disable_msix(pdev);
2157                                 return status;
2158                         }
2159                 }
2160         } else {
2161                 status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED,
2162                                      mgp->dev->name, &mgp->ss[0]);
2163                 if (status != 0) {
2164                         dev_err(&pdev->dev, "failed to allocate IRQ\n");
2165                         if (mgp->msi_enabled)
2166                                 pci_disable_msi(pdev);
2167                 }
2168         }
2169         return status;
2170 }
2171
2172 static void myri10ge_free_irq(struct myri10ge_priv *mgp)
2173 {
2174         struct pci_dev *pdev = mgp->pdev;
2175         int i;
2176
2177         if (mgp->msix_enabled) {
2178                 for (i = 0; i < mgp->num_slices; i++)
2179                         free_irq(mgp->msix_vectors[i].vector, &mgp->ss[i]);
2180         } else {
2181                 free_irq(pdev->irq, &mgp->ss[0]);
2182         }
2183         if (mgp->msi_enabled)
2184                 pci_disable_msi(pdev);
2185         if (mgp->msix_enabled)
2186                 pci_disable_msix(pdev);
2187 }
2188
2189 static int
2190 myri10ge_get_frag_header(struct skb_frag_struct *frag, void **mac_hdr,
2191                          void **ip_hdr, void **tcpudp_hdr,
2192                          u64 * hdr_flags, void *priv)
2193 {
2194         struct ethhdr *eh;
2195         struct vlan_ethhdr *veh;
2196         struct iphdr *iph;
2197         u8 *va = page_address(frag->page) + frag->page_offset;
2198         unsigned long ll_hlen;
2199         /* passed opaque through lro_receive_frags() */
2200         __wsum csum = (__force __wsum) (unsigned long)priv;
2201
2202         /* find the mac header, aborting if not IPv4 */
2203
2204         eh = (struct ethhdr *)va;
2205         *mac_hdr = eh;
2206         ll_hlen = ETH_HLEN;
2207         if (eh->h_proto != htons(ETH_P_IP)) {
2208                 if (eh->h_proto == htons(ETH_P_8021Q)) {
2209                         veh = (struct vlan_ethhdr *)va;
2210                         if (veh->h_vlan_encapsulated_proto != htons(ETH_P_IP))
2211                                 return -1;
2212
2213                         ll_hlen += VLAN_HLEN;
2214
2215                         /*
2216                          *  HW checksum starts ETH_HLEN bytes into
2217                          *  frame, so we must subtract off the VLAN
2218                          *  header's checksum before csum can be used
2219                          */
2220                         csum = csum_sub(csum, csum_partial(va + ETH_HLEN,
2221                                                            VLAN_HLEN, 0));
2222                 } else {
2223                         return -1;
2224                 }
2225         }
2226         *hdr_flags = LRO_IPV4;
2227
2228         iph = (struct iphdr *)(va + ll_hlen);
2229         *ip_hdr = iph;
2230         if (iph->protocol != IPPROTO_TCP)
2231                 return -1;
2232         if (iph->frag_off & htons(IP_MF | IP_OFFSET))
2233                 return -1;
2234         *hdr_flags |= LRO_TCP;
2235         *tcpudp_hdr = (u8 *) (*ip_hdr) + (iph->ihl << 2);
2236
2237         /* verify the IP checksum */
2238         if (unlikely(ip_fast_csum((u8 *) iph, iph->ihl)))
2239                 return -1;
2240
2241         /* verify the  checksum */
2242         if (unlikely(csum_tcpudp_magic(iph->saddr, iph->daddr,
2243                                        ntohs(iph->tot_len) - (iph->ihl << 2),
2244                                        IPPROTO_TCP, csum)))
2245                 return -1;
2246
2247         return 0;
2248 }
2249
2250 static int myri10ge_get_txrx(struct myri10ge_priv *mgp, int slice)
2251 {
2252         struct myri10ge_cmd cmd;
2253         struct myri10ge_slice_state *ss;
2254         int status;
2255
2256         ss = &mgp->ss[slice];
2257         status = 0;
2258         if (slice == 0 || (mgp->dev->real_num_tx_queues > 1)) {
2259                 cmd.data0 = slice;
2260                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET,
2261                                            &cmd, 0);
2262                 ss->tx.lanai = (struct mcp_kreq_ether_send __iomem *)
2263                     (mgp->sram + cmd.data0);
2264         }
2265         cmd.data0 = slice;
2266         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET,
2267                                     &cmd, 0);
2268         ss->rx_small.lanai = (struct mcp_kreq_ether_recv __iomem *)
2269             (mgp->sram + cmd.data0);
2270
2271         cmd.data0 = slice;
2272         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0);
2273         ss->rx_big.lanai = (struct mcp_kreq_ether_recv __iomem *)
2274             (mgp->sram + cmd.data0);
2275
2276         ss->tx.send_go = (__iomem __be32 *)
2277             (mgp->sram + MXGEFW_ETH_SEND_GO + 64 * slice);
2278         ss->tx.send_stop = (__iomem __be32 *)
2279             (mgp->sram + MXGEFW_ETH_SEND_STOP + 64 * slice);
2280         return status;
2281
2282 }
2283
2284 static int myri10ge_set_stats(struct myri10ge_priv *mgp, int slice)
2285 {
2286         struct myri10ge_cmd cmd;
2287         struct myri10ge_slice_state *ss;
2288         int status;
2289
2290         ss = &mgp->ss[slice];
2291         cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->fw_stats_bus);
2292         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->fw_stats_bus);
2293         cmd.data2 = sizeof(struct mcp_irq_data) | (slice << 16);
2294         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0);
2295         if (status == -ENOSYS) {
2296                 dma_addr_t bus = ss->fw_stats_bus;
2297                 if (slice != 0)
2298                         return -EINVAL;
2299                 bus += offsetof(struct mcp_irq_data, send_done_count);
2300                 cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus);
2301                 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus);
2302                 status = myri10ge_send_cmd(mgp,
2303                                            MXGEFW_CMD_SET_STATS_DMA_OBSOLETE,
2304                                            &cmd, 0);
2305                 /* Firmware cannot support multicast without STATS_DMA_V2 */
2306                 mgp->fw_multicast_support = 0;
2307         } else {
2308                 mgp->fw_multicast_support = 1;
2309         }
2310         return 0;
2311 }
2312
2313 static int myri10ge_open(struct net_device *dev)
2314 {
2315         struct myri10ge_slice_state *ss;
2316         struct myri10ge_priv *mgp = netdev_priv(dev);
2317         struct myri10ge_cmd cmd;
2318         int i, status, big_pow2, slice;
2319         u8 *itable;
2320         struct net_lro_mgr *lro_mgr;
2321
2322         if (mgp->running != MYRI10GE_ETH_STOPPED)
2323                 return -EBUSY;
2324
2325         mgp->running = MYRI10GE_ETH_STARTING;
2326         status = myri10ge_reset(mgp);
2327         if (status != 0) {
2328                 printk(KERN_ERR "myri10ge: %s: failed reset\n", dev->name);
2329                 goto abort_with_nothing;
2330         }
2331
2332         if (mgp->num_slices > 1) {
2333                 cmd.data0 = mgp->num_slices;
2334                 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
2335                 if (mgp->dev->real_num_tx_queues > 1)
2336                         cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
2337                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
2338                                            &cmd, 0);
2339                 if (status != 0) {
2340                         printk(KERN_ERR
2341                                "myri10ge: %s: failed to set number of slices\n",
2342                                dev->name);
2343                         goto abort_with_nothing;
2344                 }
2345                 /* setup the indirection table */
2346                 cmd.data0 = mgp->num_slices;
2347                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_TABLE_SIZE,
2348                                            &cmd, 0);
2349
2350                 status |= myri10ge_send_cmd(mgp,
2351                                             MXGEFW_CMD_GET_RSS_TABLE_OFFSET,
2352                                             &cmd, 0);
2353                 if (status != 0) {
2354                         printk(KERN_ERR
2355                                "myri10ge: %s: failed to setup rss tables\n",
2356                                dev->name);
2357                         goto abort_with_nothing;
2358                 }
2359
2360                 /* just enable an identity mapping */
2361                 itable = mgp->sram + cmd.data0;
2362                 for (i = 0; i < mgp->num_slices; i++)
2363                         __raw_writeb(i, &itable[i]);
2364
2365                 cmd.data0 = 1;
2366                 cmd.data1 = myri10ge_rss_hash;
2367                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_ENABLE,
2368                                            &cmd, 0);
2369                 if (status != 0) {
2370                         printk(KERN_ERR
2371                                "myri10ge: %s: failed to enable slices\n",
2372                                dev->name);
2373                         goto abort_with_nothing;
2374                 }
2375         }
2376
2377         status = myri10ge_request_irq(mgp);
2378         if (status != 0)
2379                 goto abort_with_nothing;
2380
2381         /* decide what small buffer size to use.  For good TCP rx
2382          * performance, it is important to not receive 1514 byte
2383          * frames into jumbo buffers, as it confuses the socket buffer
2384          * accounting code, leading to drops and erratic performance.
2385          */
2386
2387         if (dev->mtu <= ETH_DATA_LEN)
2388                 /* enough for a TCP header */
2389                 mgp->small_bytes = (128 > SMP_CACHE_BYTES)
2390                     ? (128 - MXGEFW_PAD)
2391                     : (SMP_CACHE_BYTES - MXGEFW_PAD);
2392         else
2393                 /* enough for a vlan encapsulated ETH_DATA_LEN frame */
2394                 mgp->small_bytes = VLAN_ETH_FRAME_LEN;
2395
2396         /* Override the small buffer size? */
2397         if (myri10ge_small_bytes > 0)
2398                 mgp->small_bytes = myri10ge_small_bytes;
2399
2400         /* Firmware needs the big buff size as a power of 2.  Lie and
2401          * tell him the buffer is larger, because we only use 1
2402          * buffer/pkt, and the mtu will prevent overruns.
2403          */
2404         big_pow2 = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2405         if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) {
2406                 while (!is_power_of_2(big_pow2))
2407                         big_pow2++;
2408                 mgp->big_bytes = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2409         } else {
2410                 big_pow2 = MYRI10GE_ALLOC_SIZE;
2411                 mgp->big_bytes = big_pow2;
2412         }
2413
2414         /* setup the per-slice data structures */
2415         for (slice = 0; slice < mgp->num_slices; slice++) {
2416                 ss = &mgp->ss[slice];
2417
2418                 status = myri10ge_get_txrx(mgp, slice);
2419                 if (status != 0) {
2420                         printk(KERN_ERR
2421                                "myri10ge: %s: failed to get ring sizes or locations\n",
2422                                dev->name);
2423                         goto abort_with_rings;
2424                 }
2425                 status = myri10ge_allocate_rings(ss);
2426                 if (status != 0)
2427                         goto abort_with_rings;
2428
2429                 /* only firmware which supports multiple TX queues
2430                  * supports setting up the tx stats on non-zero
2431                  * slices */
2432                 if (slice == 0 || mgp->dev->real_num_tx_queues > 1)
2433                         status = myri10ge_set_stats(mgp, slice);
2434                 if (status) {
2435                         printk(KERN_ERR
2436                                "myri10ge: %s: Couldn't set stats DMA\n",
2437                                dev->name);
2438                         goto abort_with_rings;
2439                 }
2440
2441                 lro_mgr = &ss->rx_done.lro_mgr;
2442                 lro_mgr->dev = dev;
2443                 lro_mgr->features = LRO_F_NAPI;
2444                 lro_mgr->ip_summed = CHECKSUM_COMPLETE;
2445                 lro_mgr->ip_summed_aggr = CHECKSUM_UNNECESSARY;
2446                 lro_mgr->max_desc = MYRI10GE_MAX_LRO_DESCRIPTORS;
2447                 lro_mgr->lro_arr = ss->rx_done.lro_desc;
2448                 lro_mgr->get_frag_header = myri10ge_get_frag_header;
2449                 lro_mgr->max_aggr = myri10ge_lro_max_pkts;
2450                 lro_mgr->frag_align_pad = 2;
2451                 if (lro_mgr->max_aggr > MAX_SKB_FRAGS)
2452                         lro_mgr->max_aggr = MAX_SKB_FRAGS;
2453
2454                 /* must happen prior to any irq */
2455                 napi_enable(&(ss)->napi);
2456         }
2457
2458         /* now give firmware buffers sizes, and MTU */
2459         cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
2460         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0);
2461         cmd.data0 = mgp->small_bytes;
2462         status |=
2463             myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0);
2464         cmd.data0 = big_pow2;
2465         status |=
2466             myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0);
2467         if (status) {
2468                 printk(KERN_ERR "myri10ge: %s: Couldn't set buffer sizes\n",
2469                        dev->name);
2470                 goto abort_with_rings;
2471         }
2472
2473         /*
2474          * Set Linux style TSO mode; this is needed only on newer
2475          *  firmware versions.  Older versions default to Linux
2476          *  style TSO
2477          */
2478         cmd.data0 = 0;
2479         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_TSO_MODE, &cmd, 0);
2480         if (status && status != -ENOSYS) {
2481                 printk(KERN_ERR "myri10ge: %s: Couldn't set TSO mode\n",
2482                        dev->name);
2483                 goto abort_with_rings;
2484         }
2485
2486         mgp->link_state = ~0U;
2487         mgp->rdma_tags_available = 15;
2488
2489         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0);
2490         if (status) {
2491                 printk(KERN_ERR "myri10ge: %s: Couldn't bring up link\n",
2492                        dev->name);
2493                 goto abort_with_rings;
2494         }
2495
2496         mgp->running = MYRI10GE_ETH_RUNNING;
2497         mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ;
2498         add_timer(&mgp->watchdog_timer);
2499         netif_tx_wake_all_queues(dev);
2500
2501         return 0;
2502
2503 abort_with_rings:
2504         while (slice) {
2505                 slice--;
2506                 napi_disable(&mgp->ss[slice].napi);
2507         }
2508         for (i = 0; i < mgp->num_slices; i++)
2509                 myri10ge_free_rings(&mgp->ss[i]);
2510
2511         myri10ge_free_irq(mgp);
2512
2513 abort_with_nothing:
2514         mgp->running = MYRI10GE_ETH_STOPPED;
2515         return -ENOMEM;
2516 }
2517
2518 static int myri10ge_close(struct net_device *dev)
2519 {
2520         struct myri10ge_priv *mgp = netdev_priv(dev);
2521         struct myri10ge_cmd cmd;
2522         int status, old_down_cnt;
2523         int i;
2524
2525         if (mgp->running != MYRI10GE_ETH_RUNNING)
2526                 return 0;
2527
2528         if (mgp->ss[0].tx.req_bytes == NULL)
2529                 return 0;
2530
2531         del_timer_sync(&mgp->watchdog_timer);
2532         mgp->running = MYRI10GE_ETH_STOPPING;
2533         for (i = 0; i < mgp->num_slices; i++) {
2534                 napi_disable(&mgp->ss[i].napi);
2535         }
2536         netif_carrier_off(dev);
2537
2538         netif_tx_stop_all_queues(dev);
2539         old_down_cnt = mgp->down_cnt;
2540         mb();
2541         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0);
2542         if (status)
2543                 printk(KERN_ERR "myri10ge: %s: Couldn't bring down link\n",
2544                        dev->name);
2545
2546         wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt, HZ);
2547         if (old_down_cnt == mgp->down_cnt)
2548                 printk(KERN_ERR "myri10ge: %s never got down irq\n", dev->name);
2549
2550         netif_tx_disable(dev);
2551         myri10ge_free_irq(mgp);
2552         for (i = 0; i < mgp->num_slices; i++)
2553                 myri10ge_free_rings(&mgp->ss[i]);
2554
2555         mgp->running = MYRI10GE_ETH_STOPPED;
2556         return 0;
2557 }
2558
2559 /* copy an array of struct mcp_kreq_ether_send's to the mcp.  Copy
2560  * backwards one at a time and handle ring wraps */
2561
2562 static inline void
2563 myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx,
2564                               struct mcp_kreq_ether_send *src, int cnt)
2565 {
2566         int idx, starting_slot;
2567         starting_slot = tx->req;
2568         while (cnt > 1) {
2569                 cnt--;
2570                 idx = (starting_slot + cnt) & tx->mask;
2571                 myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src));
2572                 mb();
2573         }
2574 }
2575
2576 /*
2577  * copy an array of struct mcp_kreq_ether_send's to the mcp.  Copy
2578  * at most 32 bytes at a time, so as to avoid involving the software
2579  * pio handler in the nic.   We re-write the first segment's flags
2580  * to mark them valid only after writing the entire chain.
2581  */
2582
2583 static inline void
2584 myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src,
2585                     int cnt)
2586 {
2587         int idx, i;
2588         struct mcp_kreq_ether_send __iomem *dstp, *dst;
2589         struct mcp_kreq_ether_send *srcp;
2590         u8 last_flags;
2591
2592         idx = tx->req & tx->mask;
2593
2594         last_flags = src->flags;
2595         src->flags = 0;
2596         mb();
2597         dst = dstp = &tx->lanai[idx];
2598         srcp = src;
2599
2600         if ((idx + cnt) < tx->mask) {
2601                 for (i = 0; i < (cnt - 1); i += 2) {
2602                         myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src));
2603                         mb();   /* force write every 32 bytes */
2604                         srcp += 2;
2605                         dstp += 2;
2606                 }
2607         } else {
2608                 /* submit all but the first request, and ensure
2609                  * that it is submitted below */
2610                 myri10ge_submit_req_backwards(tx, src, cnt);
2611                 i = 0;
2612         }
2613         if (i < cnt) {
2614                 /* submit the first request */
2615                 myri10ge_pio_copy(dstp, srcp, sizeof(*src));
2616                 mb();           /* barrier before setting valid flag */
2617         }
2618
2619         /* re-write the last 32-bits with the valid flags */
2620         src->flags = last_flags;
2621         put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3);
2622         tx->req += cnt;
2623         mb();
2624 }
2625
2626 /*
2627  * Transmit a packet.  We need to split the packet so that a single
2628  * segment does not cross myri10ge->tx_boundary, so this makes segment
2629  * counting tricky.  So rather than try to count segments up front, we
2630  * just give up if there are too few segments to hold a reasonably
2631  * fragmented packet currently available.  If we run
2632  * out of segments while preparing a packet for DMA, we just linearize
2633  * it and try again.
2634  */
2635
2636 static int myri10ge_xmit(struct sk_buff *skb, struct net_device *dev)
2637 {
2638         struct myri10ge_priv *mgp = netdev_priv(dev);
2639         struct myri10ge_slice_state *ss;
2640         struct mcp_kreq_ether_send *req;
2641         struct myri10ge_tx_buf *tx;
2642         struct skb_frag_struct *frag;
2643         struct netdev_queue *netdev_queue;
2644         dma_addr_t bus;
2645         u32 low;
2646         __be32 high_swapped;
2647         unsigned int len;
2648         int idx, last_idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
2649         u16 pseudo_hdr_offset, cksum_offset, queue;
2650         int cum_len, seglen, boundary, rdma_count;
2651         u8 flags, odd_flag;
2652
2653         queue = skb_get_queue_mapping(skb);
2654         ss = &mgp->ss[queue];
2655         netdev_queue = netdev_get_tx_queue(mgp->dev, queue);
2656         tx = &ss->tx;
2657
2658 again:
2659         req = tx->req_list;
2660         avail = tx->mask - 1 - (tx->req - tx->done);
2661
2662         mss = 0;
2663         max_segments = MXGEFW_MAX_SEND_DESC;
2664
2665         if (skb_is_gso(skb)) {
2666                 mss = skb_shinfo(skb)->gso_size;
2667                 max_segments = MYRI10GE_MAX_SEND_DESC_TSO;
2668         }
2669
2670         if ((unlikely(avail < max_segments))) {
2671                 /* we are out of transmit resources */
2672                 tx->stop_queue++;
2673                 netif_tx_stop_queue(netdev_queue);
2674                 return 1;
2675         }
2676
2677         /* Setup checksum offloading, if needed */
2678         cksum_offset = 0;
2679         pseudo_hdr_offset = 0;
2680         odd_flag = 0;
2681         flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
2682         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2683                 cksum_offset = skb_transport_offset(skb);
2684                 pseudo_hdr_offset = cksum_offset + skb->csum_offset;
2685                 /* If the headers are excessively large, then we must
2686                  * fall back to a software checksum */
2687                 if (unlikely(!mss && (cksum_offset > 255 ||
2688                                       pseudo_hdr_offset > 127))) {
2689                         if (skb_checksum_help(skb))
2690                                 goto drop;
2691                         cksum_offset = 0;
2692                         pseudo_hdr_offset = 0;
2693                 } else {
2694                         odd_flag = MXGEFW_FLAGS_ALIGN_ODD;
2695                         flags |= MXGEFW_FLAGS_CKSUM;
2696                 }
2697         }
2698
2699         cum_len = 0;
2700
2701         if (mss) {              /* TSO */
2702                 /* this removes any CKSUM flag from before */
2703                 flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST);
2704
2705                 /* negative cum_len signifies to the
2706                  * send loop that we are still in the
2707                  * header portion of the TSO packet.
2708                  * TSO header can be at most 1KB long */
2709                 cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb));
2710
2711                 /* for IPv6 TSO, the checksum offset stores the
2712                  * TCP header length, to save the firmware from
2713                  * the need to parse the headers */
2714                 if (skb_is_gso_v6(skb)) {
2715                         cksum_offset = tcp_hdrlen(skb);
2716                         /* Can only handle headers <= max_tso6 long */
2717                         if (unlikely(-cum_len > mgp->max_tso6))
2718                                 return myri10ge_sw_tso(skb, dev);
2719                 }
2720                 /* for TSO, pseudo_hdr_offset holds mss.
2721                  * The firmware figures out where to put
2722                  * the checksum by parsing the header. */
2723                 pseudo_hdr_offset = mss;
2724         } else
2725                 /* Mark small packets, and pad out tiny packets */
2726         if (skb->len <= MXGEFW_SEND_SMALL_SIZE) {
2727                 flags |= MXGEFW_FLAGS_SMALL;
2728
2729                 /* pad frames to at least ETH_ZLEN bytes */
2730                 if (unlikely(skb->len < ETH_ZLEN)) {
2731                         if (skb_padto(skb, ETH_ZLEN)) {
2732                                 /* The packet is gone, so we must
2733                                  * return 0 */
2734                                 ss->stats.tx_dropped += 1;
2735                                 return 0;
2736                         }
2737                         /* adjust the len to account for the zero pad
2738                          * so that the nic can know how long it is */
2739                         skb->len = ETH_ZLEN;
2740                 }
2741         }
2742
2743         /* map the skb for DMA */
2744         len = skb->len - skb->data_len;
2745         idx = tx->req & tx->mask;
2746         tx->info[idx].skb = skb;
2747         bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE);
2748         pci_unmap_addr_set(&tx->info[idx], bus, bus);
2749         pci_unmap_len_set(&tx->info[idx], len, len);
2750
2751         frag_cnt = skb_shinfo(skb)->nr_frags;
2752         frag_idx = 0;
2753         count = 0;
2754         rdma_count = 0;
2755
2756         /* "rdma_count" is the number of RDMAs belonging to the
2757          * current packet BEFORE the current send request. For
2758          * non-TSO packets, this is equal to "count".
2759          * For TSO packets, rdma_count needs to be reset
2760          * to 0 after a segment cut.
2761          *
2762          * The rdma_count field of the send request is
2763          * the number of RDMAs of the packet starting at
2764          * that request. For TSO send requests with one ore more cuts
2765          * in the middle, this is the number of RDMAs starting
2766          * after the last cut in the request. All previous
2767          * segments before the last cut implicitly have 1 RDMA.
2768          *
2769          * Since the number of RDMAs is not known beforehand,
2770          * it must be filled-in retroactively - after each
2771          * segmentation cut or at the end of the entire packet.
2772          */
2773
2774         while (1) {
2775                 /* Break the SKB or Fragment up into pieces which
2776                  * do not cross mgp->tx_boundary */
2777                 low = MYRI10GE_LOWPART_TO_U32(bus);
2778                 high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
2779                 while (len) {
2780                         u8 flags_next;
2781                         int cum_len_next;
2782
2783                         if (unlikely(count == max_segments))
2784                                 goto abort_linearize;
2785
2786                         boundary =
2787                             (low + mgp->tx_boundary) & ~(mgp->tx_boundary - 1);
2788                         seglen = boundary - low;
2789                         if (seglen > len)
2790                                 seglen = len;
2791                         flags_next = flags & ~MXGEFW_FLAGS_FIRST;
2792                         cum_len_next = cum_len + seglen;
2793                         if (mss) {      /* TSO */
2794                                 (req - rdma_count)->rdma_count = rdma_count + 1;
2795
2796                                 if (likely(cum_len >= 0)) {     /* payload */
2797                                         int next_is_first, chop;
2798
2799                                         chop = (cum_len_next > mss);
2800                                         cum_len_next = cum_len_next % mss;
2801                                         next_is_first = (cum_len_next == 0);
2802                                         flags |= chop * MXGEFW_FLAGS_TSO_CHOP;
2803                                         flags_next |= next_is_first *
2804                                             MXGEFW_FLAGS_FIRST;
2805                                         rdma_count |= -(chop | next_is_first);
2806                                         rdma_count += chop & !next_is_first;
2807                                 } else if (likely(cum_len_next >= 0)) { /* header ends */
2808                                         int small;
2809
2810                                         rdma_count = -1;
2811                                         cum_len_next = 0;
2812                                         seglen = -cum_len;
2813                                         small = (mss <= MXGEFW_SEND_SMALL_SIZE);
2814                                         flags_next = MXGEFW_FLAGS_TSO_PLD |
2815                                             MXGEFW_FLAGS_FIRST |
2816                                             (small * MXGEFW_FLAGS_SMALL);
2817                                 }
2818                         }
2819                         req->addr_high = high_swapped;
2820                         req->addr_low = htonl(low);
2821                         req->pseudo_hdr_offset = htons(pseudo_hdr_offset);
2822                         req->pad = 0;   /* complete solid 16-byte block; does this matter? */
2823                         req->rdma_count = 1;
2824                         req->length = htons(seglen);
2825                         req->cksum_offset = cksum_offset;
2826                         req->flags = flags | ((cum_len & 1) * odd_flag);
2827
2828                         low += seglen;
2829                         len -= seglen;
2830                         cum_len = cum_len_next;
2831                         flags = flags_next;
2832                         req++;
2833                         count++;
2834                         rdma_count++;
2835                         if (cksum_offset != 0 && !(mss && skb_is_gso_v6(skb))) {
2836                                 if (unlikely(cksum_offset > seglen))
2837                                         cksum_offset -= seglen;
2838                                 else
2839                                         cksum_offset = 0;
2840                         }
2841                 }
2842                 if (frag_idx == frag_cnt)
2843                         break;
2844
2845                 /* map next fragment for DMA */
2846                 idx = (count + tx->req) & tx->mask;
2847                 frag = &skb_shinfo(skb)->frags[frag_idx];
2848                 frag_idx++;
2849                 len = frag->size;
2850                 bus = pci_map_page(mgp->pdev, frag->page, frag->page_offset,
2851                                    len, PCI_DMA_TODEVICE);
2852                 pci_unmap_addr_set(&tx->info[idx], bus, bus);
2853                 pci_unmap_len_set(&tx->info[idx], len, len);
2854         }
2855
2856         (req - rdma_count)->rdma_count = rdma_count;
2857         if (mss)
2858                 do {
2859                         req--;
2860                         req->flags |= MXGEFW_FLAGS_TSO_LAST;
2861                 } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP |
2862                                          MXGEFW_FLAGS_FIRST)));
2863         idx = ((count - 1) + tx->req) & tx->mask;
2864         tx->info[idx].last = 1;
2865         myri10ge_submit_req(tx, tx->req_list, count);
2866         /* if using multiple tx queues, make sure NIC polls the
2867          * current slice */
2868         if ((mgp->dev->real_num_tx_queues > 1) && tx->queue_active == 0) {
2869                 tx->queue_active = 1;
2870                 put_be32(htonl(1), tx->send_go);
2871                 mb();
2872                 mmiowb();
2873         }
2874         tx->pkt_start++;
2875         if ((avail - count) < MXGEFW_MAX_SEND_DESC) {
2876                 tx->stop_queue++;
2877                 netif_tx_stop_queue(netdev_queue);
2878         }
2879         dev->trans_start = jiffies;
2880         return 0;
2881
2882 abort_linearize:
2883         /* Free any DMA resources we've alloced and clear out the skb
2884          * slot so as to not trip up assertions, and to avoid a
2885          * double-free if linearizing fails */
2886
2887         last_idx = (idx + 1) & tx->mask;
2888         idx = tx->req & tx->mask;
2889         tx->info[idx].skb = NULL;
2890         do {
2891                 len = pci_unmap_len(&tx->info[idx], len);
2892                 if (len) {
2893                         if (tx->info[idx].skb != NULL)
2894                                 pci_unmap_single(mgp->pdev,
2895                                                  pci_unmap_addr(&tx->info[idx],
2896                                                                 bus), len,
2897                                                  PCI_DMA_TODEVICE);
2898                         else
2899                                 pci_unmap_page(mgp->pdev,
2900                                                pci_unmap_addr(&tx->info[idx],
2901                                                               bus), len,
2902                                                PCI_DMA_TODEVICE);
2903                         pci_unmap_len_set(&tx->info[idx], len, 0);
2904                         tx->info[idx].skb = NULL;
2905                 }
2906                 idx = (idx + 1) & tx->mask;
2907         } while (idx != last_idx);
2908         if (skb_is_gso(skb)) {
2909                 printk(KERN_ERR
2910                        "myri10ge: %s: TSO but wanted to linearize?!?!?\n",
2911                        mgp->dev->name);
2912                 goto drop;
2913         }
2914
2915         if (skb_linearize(skb))
2916                 goto drop;
2917
2918         tx->linearized++;
2919         goto again;
2920
2921 drop:
2922         dev_kfree_skb_any(skb);
2923         ss->stats.tx_dropped += 1;
2924         return 0;
2925
2926 }
2927
2928 static int myri10ge_sw_tso(struct sk_buff *skb, struct net_device *dev)
2929 {
2930         struct sk_buff *segs, *curr;
2931         struct myri10ge_priv *mgp = netdev_priv(dev);
2932         struct myri10ge_slice_state *ss;
2933         int status;
2934
2935         segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO6);
2936         if (IS_ERR(segs))
2937                 goto drop;
2938
2939         while (segs) {
2940                 curr = segs;
2941                 segs = segs->next;
2942                 curr->next = NULL;
2943                 status = myri10ge_xmit(curr, dev);
2944                 if (status != 0) {
2945                         dev_kfree_skb_any(curr);
2946                         if (segs != NULL) {
2947                                 curr = segs;
2948                                 segs = segs->next;
2949                                 curr->next = NULL;
2950                                 dev_kfree_skb_any(segs);
2951                         }
2952                         goto drop;
2953                 }
2954         }
2955         dev_kfree_skb_any(skb);
2956         return 0;
2957
2958 drop:
2959         ss = &mgp->ss[skb_get_queue_mapping(skb)];
2960         dev_kfree_skb_any(skb);
2961         ss->stats.tx_dropped += 1;
2962         return 0;
2963 }
2964
2965 static struct net_device_stats *myri10ge_get_stats(struct net_device *dev)
2966 {
2967         struct myri10ge_priv *mgp = netdev_priv(dev);
2968         struct myri10ge_slice_netstats *slice_stats;
2969         struct net_device_stats *stats = &mgp->stats;
2970         int i;
2971
2972         memset(stats, 0, sizeof(*stats));
2973         for (i = 0; i < mgp->num_slices; i++) {
2974                 slice_stats = &mgp->ss[i].stats;
2975                 stats->rx_packets += slice_stats->rx_packets;
2976                 stats->tx_packets += slice_stats->tx_packets;
2977                 stats->rx_bytes += slice_stats->rx_bytes;
2978                 stats->tx_bytes += slice_stats->tx_bytes;
2979                 stats->rx_dropped += slice_stats->rx_dropped;
2980                 stats->tx_dropped += slice_stats->tx_dropped;
2981         }
2982         return stats;
2983 }
2984
2985 static void myri10ge_set_multicast_list(struct net_device *dev)
2986 {
2987         struct myri10ge_priv *mgp = netdev_priv(dev);
2988         struct myri10ge_cmd cmd;
2989         struct dev_mc_list *mc_list;
2990         __be32 data[2] = { 0, 0 };
2991         int err;
2992
2993         /* can be called from atomic contexts,
2994          * pass 1 to force atomicity in myri10ge_send_cmd() */
2995         myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1);
2996
2997         /* This firmware is known to not support multicast */
2998         if (!mgp->fw_multicast_support)
2999                 return;
3000
3001         /* Disable multicast filtering */
3002
3003         err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1);
3004         if (err != 0) {
3005                 printk(KERN_ERR "myri10ge: %s: Failed MXGEFW_ENABLE_ALLMULTI,"
3006                        " error status: %d\n", dev->name, err);
3007                 goto abort;
3008         }
3009
3010         if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) {
3011                 /* request to disable multicast filtering, so quit here */
3012                 return;
3013         }
3014
3015         /* Flush the filters */
3016
3017         err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS,
3018                                 &cmd, 1);
3019         if (err != 0) {
3020                 printk(KERN_ERR
3021                        "myri10ge: %s: Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS"
3022                        ", error status: %d\n", dev->name, err);
3023                 goto abort;
3024         }
3025
3026         /* Walk the multicast list, and add each address */
3027         for (mc_list = dev->mc_list; mc_list != NULL; mc_list = mc_list->next) {
3028                 memcpy(data, &mc_list->dmi_addr, 6);
3029                 cmd.data0 = ntohl(data[0]);
3030                 cmd.data1 = ntohl(data[1]);
3031                 err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP,
3032                                         &cmd, 1);
3033
3034                 if (err != 0) {
3035                         printk(KERN_ERR "myri10ge: %s: Failed "
3036                                "MXGEFW_JOIN_MULTICAST_GROUP, error status:"
3037                                "%d\t", dev->name, err);
3038                         printk(KERN_ERR "MAC %pM\n", mc_list->dmi_addr);
3039                         goto abort;
3040                 }
3041         }
3042         /* Enable multicast filtering */
3043         err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1);
3044         if (err != 0) {
3045                 printk(KERN_ERR "myri10ge: %s: Failed MXGEFW_DISABLE_ALLMULTI,"
3046                        "error status: %d\n", dev->name, err);
3047                 goto abort;
3048         }
3049
3050         return;
3051
3052 abort:
3053         return;
3054 }
3055
3056 static int myri10ge_set_mac_address(struct net_device *dev, void *addr)
3057 {
3058         struct sockaddr *sa = addr;
3059         struct myri10ge_priv *mgp = netdev_priv(dev);
3060         int status;
3061
3062         if (!is_valid_ether_addr(sa->sa_data))
3063                 return -EADDRNOTAVAIL;
3064
3065         status = myri10ge_update_mac_address(mgp, sa->sa_data);
3066         if (status != 0) {
3067                 printk(KERN_ERR
3068                        "myri10ge: %s: changing mac address failed with %d\n",
3069                        dev->name, status);
3070                 return status;
3071         }
3072
3073         /* change the dev structure */
3074         memcpy(dev->dev_addr, sa->sa_data, 6);
3075         return 0;
3076 }
3077
3078 static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
3079 {
3080         struct myri10ge_priv *mgp = netdev_priv(dev);
3081         int error = 0;
3082
3083         if ((new_mtu < 68) || (ETH_HLEN + new_mtu > MYRI10GE_MAX_ETHER_MTU)) {
3084                 printk(KERN_ERR "myri10ge: %s: new mtu (%d) is not valid\n",
3085                        dev->name, new_mtu);
3086                 return -EINVAL;
3087         }
3088         printk(KERN_INFO "%s: changing mtu from %d to %d\n",
3089                dev->name, dev->mtu, new_mtu);
3090         if (mgp->running) {
3091                 /* if we change the mtu on an active device, we must
3092                  * reset the device so the firmware sees the change */
3093                 myri10ge_close(dev);
3094                 dev->mtu = new_mtu;
3095                 myri10ge_open(dev);
3096         } else
3097                 dev->mtu = new_mtu;
3098
3099         return error;
3100 }
3101
3102 /*
3103  * Enable ECRC to align PCI-E Completion packets on an 8-byte boundary.
3104  * Only do it if the bridge is a root port since we don't want to disturb
3105  * any other device, except if forced with myri10ge_ecrc_enable > 1.
3106  */
3107
3108 static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
3109 {
3110         struct pci_dev *bridge = mgp->pdev->bus->self;
3111         struct device *dev = &mgp->pdev->dev;
3112         unsigned cap;
3113         unsigned err_cap;
3114         u16 val;
3115         u8 ext_type;
3116         int ret;
3117
3118         if (!myri10ge_ecrc_enable || !bridge)
3119                 return;
3120
3121         /* check that the bridge is a root port */
3122         cap = pci_find_capability(bridge, PCI_CAP_ID_EXP);
3123         pci_read_config_word(bridge, cap + PCI_CAP_FLAGS, &val);
3124         ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
3125         if (ext_type != PCI_EXP_TYPE_ROOT_PORT) {
3126                 if (myri10ge_ecrc_enable > 1) {
3127                         struct pci_dev *prev_bridge, *old_bridge = bridge;
3128
3129                         /* Walk the hierarchy up to the root port
3130                          * where ECRC has to be enabled */
3131                         do {
3132                                 prev_bridge = bridge;
3133                                 bridge = bridge->bus->self;
3134                                 if (!bridge || prev_bridge == bridge) {
3135                                         dev_err(dev,
3136                                                 "Failed to find root port"
3137                                                 " to force ECRC\n");
3138                                         return;
3139                                 }
3140                                 cap =
3141                                     pci_find_capability(bridge, PCI_CAP_ID_EXP);
3142                                 pci_read_config_word(bridge,
3143                                                      cap + PCI_CAP_FLAGS, &val);
3144                                 ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
3145                         } while (ext_type != PCI_EXP_TYPE_ROOT_PORT);
3146
3147                         dev_info(dev,
3148                                  "Forcing ECRC on non-root port %s"
3149                                  " (enabling on root port %s)\n",
3150                                  pci_name(old_bridge), pci_name(bridge));
3151                 } else {
3152                         dev_err(dev,
3153                                 "Not enabling ECRC on non-root port %s\n",
3154                                 pci_name(bridge));
3155                         return;
3156                 }
3157         }
3158
3159         cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
3160         if (!cap)
3161                 return;
3162
3163         ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap);
3164         if (ret) {
3165                 dev_err(dev, "failed reading ext-conf-space of %s\n",
3166                         pci_name(bridge));
3167                 dev_err(dev, "\t pci=nommconf in use? "
3168                         "or buggy/incomplete/absent ACPI MCFG attr?\n");
3169                 return;
3170         }
3171         if (!(err_cap & PCI_ERR_CAP_ECRC_GENC))
3172                 return;
3173
3174         err_cap |= PCI_ERR_CAP_ECRC_GENE;
3175         pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap);
3176         dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge));
3177 }
3178
3179 /*
3180  * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput
3181  * when the PCI-E Completion packets are aligned on an 8-byte
3182  * boundary.  Some PCI-E chip sets always align Completion packets; on
3183  * the ones that do not, the alignment can be enforced by enabling
3184  * ECRC generation (if supported).
3185  *
3186  * When PCI-E Completion packets are not aligned, it is actually more
3187  * efficient to limit Read-DMA transactions to 2KB, rather than 4KB.
3188  *
3189  * If the driver can neither enable ECRC nor verify that it has
3190  * already been enabled, then it must use a firmware image which works
3191  * around unaligned completion packets (myri10ge_rss_ethp_z8e.dat), and it
3192  * should also ensure that it never gives the device a Read-DMA which is
3193  * larger than 2KB by setting the tx_boundary to 2KB.  If ECRC is
3194  * enabled, then the driver should use the aligned (myri10ge_rss_eth_z8e.dat)
3195  * firmware image, and set tx_boundary to 4KB.
3196  */
3197
3198 static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
3199 {
3200         struct pci_dev *pdev = mgp->pdev;
3201         struct device *dev = &pdev->dev;
3202         int status;
3203
3204         mgp->tx_boundary = 4096;
3205         /*
3206          * Verify the max read request size was set to 4KB
3207          * before trying the test with 4KB.
3208          */
3209         status = pcie_get_readrq(pdev);
3210         if (status < 0) {
3211                 dev_err(dev, "Couldn't read max read req size: %d\n", status);
3212                 goto abort;
3213         }
3214         if (status != 4096) {
3215                 dev_warn(dev, "Max Read Request size != 4096 (%d)\n", status);
3216                 mgp->tx_boundary = 2048;
3217         }
3218         /*
3219          * load the optimized firmware (which assumes aligned PCIe
3220          * completions) in order to see if it works on this host.
3221          */
3222         mgp->fw_name = myri10ge_fw_aligned;
3223         status = myri10ge_load_firmware(mgp, 1);
3224         if (status != 0) {
3225                 goto abort;
3226         }
3227
3228         /*
3229          * Enable ECRC if possible
3230          */
3231         myri10ge_enable_ecrc(mgp);
3232
3233         /*
3234          * Run a DMA test which watches for unaligned completions and
3235          * aborts on the first one seen.
3236          */
3237
3238         status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST);
3239         if (status == 0)
3240                 return;         /* keep the aligned firmware */
3241
3242         if (status != -E2BIG)
3243                 dev_warn(dev, "DMA test failed: %d\n", status);
3244         if (status == -ENOSYS)
3245                 dev_warn(dev, "Falling back to ethp! "
3246                          "Please install up to date fw\n");
3247 abort:
3248         /* fall back to using the unaligned firmware */
3249         mgp->tx_boundary = 2048;
3250         mgp->fw_name = myri10ge_fw_unaligned;
3251
3252 }
3253
3254 static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
3255 {
3256         if (myri10ge_force_firmware == 0) {
3257                 int link_width, exp_cap;
3258                 u16 lnk;
3259
3260                 exp_cap = pci_find_capability(mgp->pdev, PCI_CAP_ID_EXP);
3261                 pci_read_config_word(mgp->pdev, exp_cap + PCI_EXP_LNKSTA, &lnk);
3262                 link_width = (lnk >> 4) & 0x3f;
3263
3264                 /* Check to see if Link is less than 8 or if the
3265                  * upstream bridge is known to provide aligned
3266                  * completions */
3267                 if (link_width < 8) {
3268                         dev_info(&mgp->pdev->dev, "PCIE x%d Link\n",
3269                                  link_width);
3270                         mgp->tx_boundary = 4096;
3271                         mgp->fw_name = myri10ge_fw_aligned;
3272                 } else {
3273                         myri10ge_firmware_probe(mgp);
3274                 }
3275         } else {
3276                 if (myri10ge_force_firmware == 1) {
3277                         dev_info(&mgp->pdev->dev,
3278                                  "Assuming aligned completions (forced)\n");
3279                         mgp->tx_boundary = 4096;
3280                         mgp->fw_name = myri10ge_fw_aligned;
3281                 } else {
3282                         dev_info(&mgp->pdev->dev,
3283                                  "Assuming unaligned completions (forced)\n");
3284                         mgp->tx_boundary = 2048;
3285                         mgp->fw_name = myri10ge_fw_unaligned;
3286                 }
3287         }
3288         if (myri10ge_fw_name != NULL) {
3289                 dev_info(&mgp->pdev->dev, "overriding firmware to %s\n",
3290                          myri10ge_fw_name);
3291                 mgp->fw_name = myri10ge_fw_name;
3292         }
3293 }
3294
3295 #ifdef CONFIG_PM
3296 static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state)
3297 {
3298         struct myri10ge_priv *mgp;
3299         struct net_device *netdev;
3300
3301         mgp = pci_get_drvdata(pdev);
3302         if (mgp == NULL)
3303                 return -EINVAL;
3304         netdev = mgp->dev;
3305
3306         netif_device_detach(netdev);
3307         if (netif_running(netdev)) {
3308                 printk(KERN_INFO "myri10ge: closing %s\n", netdev->name);
3309                 rtnl_lock();
3310                 myri10ge_close(netdev);
3311                 rtnl_unlock();
3312         }
3313         myri10ge_dummy_rdma(mgp, 0);
3314         pci_save_state(pdev);
3315         pci_disable_device(pdev);
3316
3317         return pci_set_power_state(pdev, pci_choose_state(pdev, state));
3318 }
3319
3320 static int myri10ge_resume(struct pci_dev *pdev)
3321 {
3322         struct myri10ge_priv *mgp;
3323         struct net_device *netdev;
3324         int status;
3325         u16 vendor;
3326
3327         mgp = pci_get_drvdata(pdev);
3328         if (mgp == NULL)
3329                 return -EINVAL;
3330         netdev = mgp->dev;
3331         pci_set_power_state(pdev, 0);   /* zeros conf space as a side effect */
3332         msleep(5);              /* give card time to respond */
3333         pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3334         if (vendor == 0xffff) {
3335                 printk(KERN_ERR "myri10ge: %s: device disappeared!\n",
3336                        mgp->dev->name);
3337                 return -EIO;
3338         }
3339
3340         status = pci_restore_state(pdev);
3341         if (status)
3342                 return status;
3343
3344         status = pci_enable_device(pdev);
3345         if (status) {
3346                 dev_err(&pdev->dev, "failed to enable device\n");
3347                 return status;
3348         }
3349
3350         pci_set_master(pdev);
3351
3352         myri10ge_reset(mgp);
3353         myri10ge_dummy_rdma(mgp, 1);
3354
3355         /* Save configuration space to be restored if the
3356          * nic resets due to a parity error */
3357         pci_save_state(pdev);
3358
3359         if (netif_running(netdev)) {
3360                 rtnl_lock();
3361                 status = myri10ge_open(netdev);
3362                 rtnl_unlock();
3363                 if (status != 0)
3364                         goto abort_with_enabled;
3365
3366         }
3367         netif_device_attach(netdev);
3368
3369         return 0;
3370
3371 abort_with_enabled:
3372         pci_disable_device(pdev);
3373         return -EIO;
3374
3375 }
3376 #endif                          /* CONFIG_PM */
3377
3378 static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp)
3379 {
3380         struct pci_dev *pdev = mgp->pdev;
3381         int vs = mgp->vendor_specific_offset;
3382         u32 reboot;
3383
3384         /*enter read32 mode */
3385         pci_write_config_byte(pdev, vs + 0x10, 0x3);
3386
3387         /*read REBOOT_STATUS (0xfffffff0) */
3388         pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0);
3389         pci_read_config_dword(pdev, vs + 0x14, &reboot);
3390         return reboot;
3391 }
3392
3393 /*
3394  * This watchdog is used to check whether the board has suffered
3395  * from a parity error and needs to be recovered.
3396  */
3397 static void myri10ge_watchdog(struct work_struct *work)
3398 {
3399         struct myri10ge_priv *mgp =
3400             container_of(work, struct myri10ge_priv, watchdog_work);
3401         struct myri10ge_tx_buf *tx;
3402         u32 reboot;
3403         int status;
3404         int i;
3405         u16 cmd, vendor;
3406
3407         mgp->watchdog_resets++;
3408         pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3409         if ((cmd & PCI_COMMAND_MASTER) == 0) {
3410                 /* Bus master DMA disabled?  Check to see
3411                  * if the card rebooted due to a parity error
3412                  * For now, just report it */
3413                 reboot = myri10ge_read_reboot(mgp);
3414                 printk(KERN_ERR
3415                        "myri10ge: %s: NIC rebooted (0x%x),%s resetting\n",
3416                        mgp->dev->name, reboot,
3417                        myri10ge_reset_recover ? " " : " not");
3418                 if (myri10ge_reset_recover == 0)
3419                         return;
3420
3421                 myri10ge_reset_recover--;
3422
3423                 /*
3424                  * A rebooted nic will come back with config space as
3425                  * it was after power was applied to PCIe bus.
3426                  * Attempt to restore config space which was saved
3427                  * when the driver was loaded, or the last time the
3428                  * nic was resumed from power saving mode.
3429                  */
3430                 pci_restore_state(mgp->pdev);
3431
3432                 /* save state again for accounting reasons */
3433                 pci_save_state(mgp->pdev);
3434
3435         } else {
3436                 /* if we get back -1's from our slot, perhaps somebody
3437                  * powered off our card.  Don't try to reset it in
3438                  * this case */
3439                 if (cmd == 0xffff) {
3440                         pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3441                         if (vendor == 0xffff) {
3442                                 printk(KERN_ERR
3443                                        "myri10ge: %s: device disappeared!\n",
3444                                        mgp->dev->name);
3445                                 return;
3446                         }
3447                 }
3448                 /* Perhaps it is a software error.  Try to reset */
3449
3450                 printk(KERN_ERR "myri10ge: %s: device timeout, resetting\n",
3451                        mgp->dev->name);
3452                 for (i = 0; i < mgp->num_slices; i++) {
3453                         tx = &mgp->ss[i].tx;
3454                         printk(KERN_INFO
3455                                "myri10ge: %s: (%d): %d %d %d %d %d %d\n",
3456                                mgp->dev->name, i, tx->queue_active, tx->req,
3457                                tx->done, tx->pkt_start, tx->pkt_done,
3458                                (int)ntohl(mgp->ss[i].fw_stats->
3459                                           send_done_count));
3460                         msleep(2000);
3461                         printk(KERN_INFO
3462                                "myri10ge: %s: (%d): %d %d %d %d %d %d\n",
3463                                mgp->dev->name, i, tx->queue_active, tx->req,
3464                                tx->done, tx->pkt_start, tx->pkt_done,
3465                                (int)ntohl(mgp->ss[i].fw_stats->
3466                                           send_done_count));
3467                 }
3468         }
3469
3470         rtnl_lock();
3471         myri10ge_close(mgp->dev);
3472         status = myri10ge_load_firmware(mgp, 1);
3473         if (status != 0)
3474                 printk(KERN_ERR "myri10ge: %s: failed to load firmware\n",
3475                        mgp->dev->name);
3476         else
3477                 myri10ge_open(mgp->dev);
3478         rtnl_unlock();
3479 }
3480
3481 /*
3482  * We use our own timer routine rather than relying upon
3483  * netdev->tx_timeout because we have a very large hardware transmit
3484  * queue.  Due to the large queue, the netdev->tx_timeout function
3485  * cannot detect a NIC with a parity error in a timely fashion if the
3486  * NIC is lightly loaded.
3487  */
3488 static void myri10ge_watchdog_timer(unsigned long arg)
3489 {
3490         struct myri10ge_priv *mgp;
3491         struct myri10ge_slice_state *ss;
3492         int i, reset_needed;
3493         u32 rx_pause_cnt;
3494
3495         mgp = (struct myri10ge_priv *)arg;
3496
3497         rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3498         for (i = 0, reset_needed = 0;
3499              i < mgp->num_slices && reset_needed == 0; ++i) {
3500
3501                 ss = &mgp->ss[i];
3502                 if (ss->rx_small.watchdog_needed) {
3503                         myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
3504                                                 mgp->small_bytes + MXGEFW_PAD,
3505                                                 1);
3506                         if (ss->rx_small.fill_cnt - ss->rx_small.cnt >=
3507                             myri10ge_fill_thresh)
3508                                 ss->rx_small.watchdog_needed = 0;
3509                 }
3510                 if (ss->rx_big.watchdog_needed) {
3511                         myri10ge_alloc_rx_pages(mgp, &ss->rx_big,
3512                                                 mgp->big_bytes, 1);
3513                         if (ss->rx_big.fill_cnt - ss->rx_big.cnt >=
3514                             myri10ge_fill_thresh)
3515                                 ss->rx_big.watchdog_needed = 0;
3516                 }
3517
3518                 if (ss->tx.req != ss->tx.done &&
3519                     ss->tx.done == ss->watchdog_tx_done &&
3520                     ss->watchdog_tx_req != ss->watchdog_tx_done) {
3521                         /* nic seems like it might be stuck.. */
3522                         if (rx_pause_cnt != mgp->watchdog_pause) {
3523                                 if (net_ratelimit())
3524                                         printk(KERN_WARNING
3525                                                "myri10ge %s slice %d:"
3526                                                "TX paused, check link partner\n",
3527                                                mgp->dev->name, i);
3528                         } else {
3529                                 printk(KERN_WARNING
3530                                        "myri10ge %s slice %d stuck:",
3531                                        mgp->dev->name, i);
3532                                 reset_needed = 1;
3533                         }
3534                 }
3535                 ss->watchdog_tx_done = ss->tx.done;
3536                 ss->watchdog_tx_req = ss->tx.req;
3537         }
3538         mgp->watchdog_pause = rx_pause_cnt;
3539
3540         if (reset_needed) {
3541                 schedule_work(&mgp->watchdog_work);
3542         } else {
3543                 /* rearm timer */
3544                 mod_timer(&mgp->watchdog_timer,
3545                           jiffies + myri10ge_watchdog_timeout * HZ);
3546         }
3547 }
3548
3549 static void myri10ge_free_slices(struct myri10ge_priv *mgp)
3550 {
3551         struct myri10ge_slice_state *ss;
3552         struct pci_dev *pdev = mgp->pdev;
3553         size_t bytes;
3554         int i;
3555
3556         if (mgp->ss == NULL)
3557                 return;
3558
3559         for (i = 0; i < mgp->num_slices; i++) {
3560                 ss = &mgp->ss[i];
3561                 if (ss->rx_done.entry != NULL) {
3562                         bytes = mgp->max_intr_slots *
3563                             sizeof(*ss->rx_done.entry);
3564                         dma_free_coherent(&pdev->dev, bytes,
3565                                           ss->rx_done.entry, ss->rx_done.bus);
3566                         ss->rx_done.entry = NULL;
3567                 }
3568                 if (ss->fw_stats != NULL) {
3569                         bytes = sizeof(*ss->fw_stats);
3570                         dma_free_coherent(&pdev->dev, bytes,
3571                                           ss->fw_stats, ss->fw_stats_bus);
3572                         ss->fw_stats = NULL;
3573                 }
3574         }
3575         kfree(mgp->ss);
3576         mgp->ss = NULL;
3577 }
3578
3579 static int myri10ge_alloc_slices(struct myri10ge_priv *mgp)
3580 {
3581         struct myri10ge_slice_state *ss;
3582         struct pci_dev *pdev = mgp->pdev;
3583         size_t bytes;
3584         int i;
3585
3586         bytes = sizeof(*mgp->ss) * mgp->num_slices;
3587         mgp->ss = kzalloc(bytes, GFP_KERNEL);
3588         if (mgp->ss == NULL) {
3589                 return -ENOMEM;
3590         }
3591
3592         for (i = 0; i < mgp->num_slices; i++) {
3593                 ss = &mgp->ss[i];
3594                 bytes = mgp->max_intr_slots * sizeof(*ss->rx_done.entry);
3595                 ss->rx_done.entry = dma_alloc_coherent(&pdev->dev, bytes,
3596                                                        &ss->rx_done.bus,
3597                                                        GFP_KERNEL);
3598                 if (ss->rx_done.entry == NULL)
3599                         goto abort;
3600                 memset(ss->rx_done.entry, 0, bytes);
3601                 bytes = sizeof(*ss->fw_stats);
3602                 ss->fw_stats = dma_alloc_coherent(&pdev->dev, bytes,
3603                                                   &ss->fw_stats_bus,
3604                                                   GFP_KERNEL);
3605                 if (ss->fw_stats == NULL)
3606                         goto abort;
3607                 ss->mgp = mgp;
3608                 ss->dev = mgp->dev;
3609                 netif_napi_add(ss->dev, &ss->napi, myri10ge_poll,
3610                                myri10ge_napi_weight);
3611         }
3612         return 0;
3613 abort:
3614         myri10ge_free_slices(mgp);
3615         return -ENOMEM;
3616 }
3617
3618 /*
3619  * This function determines the number of slices supported.
3620  * The number slices is the minumum of the number of CPUS,
3621  * the number of MSI-X irqs supported, the number of slices
3622  * supported by the firmware
3623  */
3624 static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
3625 {
3626         struct myri10ge_cmd cmd;
3627         struct pci_dev *pdev = mgp->pdev;
3628         char *old_fw;
3629         int i, status, ncpus, msix_cap;
3630
3631         mgp->num_slices = 1;
3632         msix_cap = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3633         ncpus = num_online_cpus();
3634
3635         if (myri10ge_max_slices == 1 || msix_cap == 0 ||
3636             (myri10ge_max_slices == -1 && ncpus < 2))
3637                 return;
3638
3639         /* try to load the slice aware rss firmware */
3640         old_fw = mgp->fw_name;
3641         if (myri10ge_fw_name != NULL) {
3642                 dev_info(&mgp->pdev->dev, "overriding rss firmware to %s\n",
3643                          myri10ge_fw_name);
3644                 mgp->fw_name = myri10ge_fw_name;
3645         } else if (old_fw == myri10ge_fw_aligned)
3646                 mgp->fw_name = myri10ge_fw_rss_aligned;
3647         else
3648                 mgp->fw_name = myri10ge_fw_rss_unaligned;
3649         status = myri10ge_load_firmware(mgp, 0);
3650         if (status != 0) {
3651                 dev_info(&pdev->dev, "Rss firmware not found\n");
3652                 return;
3653         }
3654
3655         /* hit the board with a reset to ensure it is alive */
3656         memset(&cmd, 0, sizeof(cmd));
3657         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
3658         if (status != 0) {
3659                 dev_err(&mgp->pdev->dev, "failed reset\n");
3660                 goto abort_with_fw;
3661                 return;
3662         }
3663
3664         mgp->max_intr_slots = cmd.data0 / sizeof(struct mcp_slot);
3665
3666         /* tell it the size of the interrupt queues */
3667         cmd.data0 = mgp->max_intr_slots * sizeof(struct mcp_slot);
3668         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
3669         if (status != 0) {
3670                 dev_err(&mgp->pdev->dev, "failed MXGEFW_CMD_SET_INTRQ_SIZE\n");
3671                 goto abort_with_fw;
3672         }
3673
3674         /* ask the maximum number of slices it supports */
3675         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES, &cmd, 0);
3676         if (status != 0)
3677                 goto abort_with_fw;
3678         else
3679                 mgp->num_slices = cmd.data0;
3680
3681         /* Only allow multiple slices if MSI-X is usable */
3682         if (!myri10ge_msi) {
3683                 goto abort_with_fw;
3684         }
3685
3686         /* if the admin did not specify a limit to how many
3687          * slices we should use, cap it automatically to the
3688          * number of CPUs currently online */
3689         if (myri10ge_max_slices == -1)
3690                 myri10ge_max_slices = ncpus;
3691
3692         if (mgp->num_slices > myri10ge_max_slices)
3693                 mgp->num_slices = myri10ge_max_slices;
3694
3695         /* Now try to allocate as many MSI-X vectors as we have
3696          * slices. We give up on MSI-X if we can only get a single
3697          * vector. */
3698
3699         mgp->msix_vectors = kzalloc(mgp->num_slices *
3700                                     sizeof(*mgp->msix_vectors), GFP_KERNEL);
3701         if (mgp->msix_vectors == NULL)
3702                 goto disable_msix;
3703         for (i = 0; i < mgp->num_slices; i++) {
3704                 mgp->msix_vectors[i].entry = i;
3705         }
3706
3707         while (mgp->num_slices > 1) {
3708                 /* make sure it is a power of two */
3709                 while (!is_power_of_2(mgp->num_slices))
3710                         mgp->num_slices--;
3711                 if (mgp->num_slices == 1)
3712                         goto disable_msix;
3713                 status = pci_enable_msix(pdev, mgp->msix_vectors,
3714                                          mgp->num_slices);
3715                 if (status == 0) {
3716                         pci_disable_msix(pdev);
3717                         return;
3718                 }
3719                 if (status > 0)
3720                         mgp->num_slices = status;
3721                 else
3722                         goto disable_msix;
3723         }
3724
3725 disable_msix:
3726         if (mgp->msix_vectors != NULL) {
3727                 kfree(mgp->msix_vectors);
3728                 mgp->msix_vectors = NULL;
3729         }
3730
3731 abort_with_fw:
3732         mgp->num_slices = 1;
3733         mgp->fw_name = old_fw;
3734         myri10ge_load_firmware(mgp, 0);
3735 }
3736
3737 static const struct net_device_ops myri10ge_netdev_ops = {
3738         .ndo_open               = myri10ge_open,
3739         .ndo_stop               = myri10ge_close,
3740         .ndo_start_xmit         = myri10ge_xmit,
3741         .ndo_get_stats          = myri10ge_get_stats,
3742         .ndo_validate_addr      = eth_validate_addr,
3743         .ndo_change_mtu         = myri10ge_change_mtu,
3744         .ndo_set_multicast_list = myri10ge_set_multicast_list,
3745         .ndo_set_mac_address    = myri10ge_set_mac_address,
3746 };
3747
3748 static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3749 {
3750         struct net_device *netdev;
3751         struct myri10ge_priv *mgp;
3752         struct device *dev = &pdev->dev;
3753         int i;
3754         int status = -ENXIO;
3755         int dac_enabled;
3756         unsigned hdr_offset, ss_offset;
3757
3758         netdev = alloc_etherdev_mq(sizeof(*mgp), MYRI10GE_MAX_SLICES);
3759         if (netdev == NULL) {
3760                 dev_err(dev, "Could not allocate ethernet device\n");
3761                 return -ENOMEM;
3762         }
3763
3764         SET_NETDEV_DEV(netdev, &pdev->dev);
3765
3766         mgp = netdev_priv(netdev);
3767         mgp->dev = netdev;
3768         mgp->pdev = pdev;
3769         mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
3770         mgp->pause = myri10ge_flow_control;
3771         mgp->intr_coal_delay = myri10ge_intr_coal_delay;
3772         mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT);
3773         init_waitqueue_head(&mgp->down_wq);
3774
3775         if (pci_enable_device(pdev)) {
3776                 dev_err(&pdev->dev, "pci_enable_device call failed\n");
3777                 status = -ENODEV;
3778                 goto abort_with_netdev;
3779         }
3780
3781         /* Find the vendor-specific cap so we can check
3782          * the reboot register later on */
3783         mgp->vendor_specific_offset
3784             = pci_find_capability(pdev, PCI_CAP_ID_VNDR);
3785
3786         /* Set our max read request to 4KB */
3787         status = pcie_set_readrq(pdev, 4096);
3788         if (status != 0) {
3789                 dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n",
3790                         status);
3791                 goto abort_with_enabled;
3792         }
3793
3794         pci_set_master(pdev);
3795         dac_enabled = 1;
3796         status = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
3797         if (status != 0) {
3798                 dac_enabled = 0;
3799                 dev_err(&pdev->dev,
3800                         "64-bit pci address mask was refused, "
3801                         "trying 32-bit\n");
3802                 status = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3803         }
3804         if (status != 0) {
3805                 dev_err(&pdev->dev, "Error %d setting DMA mask\n", status);
3806                 goto abort_with_enabled;
3807         }
3808         (void)pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
3809         mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd),
3810                                       &mgp->cmd_bus, GFP_KERNEL);
3811         if (mgp->cmd == NULL)
3812                 goto abort_with_enabled;
3813
3814         mgp->board_span = pci_resource_len(pdev, 0);
3815         mgp->iomem_base = pci_resource_start(pdev, 0);
3816         mgp->mtrr = -1;
3817         mgp->wc_enabled = 0;
3818 #ifdef CONFIG_MTRR
3819         mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span,
3820                              MTRR_TYPE_WRCOMB, 1);
3821         if (mgp->mtrr >= 0)
3822                 mgp->wc_enabled = 1;
3823 #endif
3824         mgp->sram = ioremap_wc(mgp->iomem_base, mgp->board_span);
3825         if (mgp->sram == NULL) {
3826                 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n",
3827                         mgp->board_span, mgp->iomem_base);
3828                 status = -ENXIO;
3829                 goto abort_with_mtrr;
3830         }
3831         hdr_offset =
3832             ntohl(__raw_readl(mgp->sram + MCP_HEADER_PTR_OFFSET)) & 0xffffc;
3833         ss_offset = hdr_offset + offsetof(struct mcp_gen_header, string_specs);
3834         mgp->sram_size = ntohl(__raw_readl(mgp->sram + ss_offset));
3835         if (mgp->sram_size > mgp->board_span ||
3836             mgp->sram_size <= MYRI10GE_FW_OFFSET) {
3837                 dev_err(&pdev->dev,
3838                         "invalid sram_size %dB or board span %ldB\n",
3839                         mgp->sram_size, mgp->board_span);
3840                 goto abort_with_ioremap;
3841         }
3842         memcpy_fromio(mgp->eeprom_strings,
3843                       mgp->sram + mgp->sram_size, MYRI10GE_EEPROM_STRINGS_SIZE);
3844         memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2);
3845         status = myri10ge_read_mac_addr(mgp);
3846         if (status)
3847                 goto abort_with_ioremap;
3848
3849         for (i = 0; i < ETH_ALEN; i++)
3850                 netdev->dev_addr[i] = mgp->mac_addr[i];
3851
3852         myri10ge_select_firmware(mgp);
3853
3854         status = myri10ge_load_firmware(mgp, 1);
3855         if (status != 0) {
3856                 dev_err(&pdev->dev, "failed to load firmware\n");
3857                 goto abort_with_ioremap;
3858         }
3859         myri10ge_probe_slices(mgp);
3860         status = myri10ge_alloc_slices(mgp);
3861         if (status != 0) {
3862                 dev_err(&pdev->dev, "failed to alloc slice state\n");
3863                 goto abort_with_firmware;
3864         }
3865         netdev->real_num_tx_queues = mgp->num_slices;
3866         status = myri10ge_reset(mgp);
3867         if (status != 0) {
3868                 dev_err(&pdev->dev, "failed reset\n");
3869                 goto abort_with_slices;
3870         }
3871 #ifdef CONFIG_MYRI10GE_DCA
3872         myri10ge_setup_dca(mgp);
3873 #endif
3874         pci_set_drvdata(pdev, mgp);
3875         if ((myri10ge_initial_mtu + ETH_HLEN) > MYRI10GE_MAX_ETHER_MTU)
3876                 myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
3877         if ((myri10ge_initial_mtu + ETH_HLEN) < 68)
3878                 myri10ge_initial_mtu = 68;
3879
3880         netdev->netdev_ops = &myri10ge_netdev_ops;
3881         netdev->mtu = myri10ge_initial_mtu;
3882         netdev->base_addr = mgp->iomem_base;
3883         netdev->features = mgp->features;
3884
3885         if (dac_enabled)
3886                 netdev->features |= NETIF_F_HIGHDMA;
3887
3888         /* make sure we can get an irq, and that MSI can be
3889          * setup (if available).  Also ensure netdev->irq
3890          * is set to correct value if MSI is enabled */
3891         status = myri10ge_request_irq(mgp);
3892         if (status != 0)
3893                 goto abort_with_firmware;
3894         netdev->irq = pdev->irq;
3895         myri10ge_free_irq(mgp);
3896
3897         /* Save configuration space to be restored if the
3898          * nic resets due to a parity error */
3899         pci_save_state(pdev);
3900
3901         /* Setup the watchdog timer */
3902         setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer,
3903                     (unsigned long)mgp);
3904
3905         SET_ETHTOOL_OPS(netdev, &myri10ge_ethtool_ops);
3906         INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog);
3907         status = register_netdev(netdev);
3908         if (status != 0) {
3909                 dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
3910                 goto abort_with_state;
3911         }
3912         if (mgp->msix_enabled)
3913                 dev_info(dev, "%d MSI-X IRQs, tx bndry %d, fw %s, WC %s\n",
3914                          mgp->num_slices, mgp->tx_boundary, mgp->fw_name,
3915                          (mgp->wc_enabled ? "Enabled" : "Disabled"));
3916         else
3917                 dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, WC %s\n",
3918                          mgp->msi_enabled ? "MSI" : "xPIC",
3919                          netdev->irq, mgp->tx_boundary, mgp->fw_name,
3920                          (mgp->wc_enabled ? "Enabled" : "Disabled"));
3921
3922         return 0;
3923
3924 abort_with_state:
3925         pci_restore_state(pdev);
3926
3927 abort_with_slices:
3928         myri10ge_free_slices(mgp);
3929
3930 abort_with_firmware:
3931         myri10ge_dummy_rdma(mgp, 0);
3932
3933 abort_with_ioremap:
3934         if (mgp->mac_addr_string != NULL)
3935                 dev_err(&pdev->dev,
3936                         "myri10ge_probe() failed: MAC=%s, SN=%ld\n",
3937                         mgp->mac_addr_string, mgp->serial_number);
3938         iounmap(mgp->sram);
3939
3940 abort_with_mtrr:
3941 #ifdef CONFIG_MTRR
3942         if (mgp->mtrr >= 0)
3943                 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
3944 #endif
3945         dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
3946                           mgp->cmd, mgp->cmd_bus);
3947
3948 abort_with_enabled:
3949         pci_disable_device(pdev);
3950
3951 abort_with_netdev:
3952         free_netdev(netdev);
3953         return status;
3954 }
3955
3956 /*
3957  * myri10ge_remove
3958  *
3959  * Does what is necessary to shutdown one Myrinet device. Called
3960  *   once for each Myrinet card by the kernel when a module is
3961  *   unloaded.
3962  */
3963 static void myri10ge_remove(struct pci_dev *pdev)
3964 {
3965         struct myri10ge_priv *mgp;
3966         struct net_device *netdev;
3967
3968         mgp = pci_get_drvdata(pdev);
3969         if (mgp == NULL)
3970                 return;
3971
3972         flush_scheduled_work();
3973         netdev = mgp->dev;
3974         unregister_netdev(netdev);
3975
3976 #ifdef CONFIG_MYRI10GE_DCA
3977         myri10ge_teardown_dca(mgp);
3978 #endif
3979         myri10ge_dummy_rdma(mgp, 0);
3980
3981         /* avoid a memory leak */
3982         pci_restore_state(pdev);
3983
3984         iounmap(mgp->sram);
3985
3986 #ifdef CONFIG_MTRR
3987         if (mgp->mtrr >= 0)
3988                 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
3989 #endif
3990         myri10ge_free_slices(mgp);
3991         if (mgp->msix_vectors != NULL)
3992                 kfree(mgp->msix_vectors);
3993         dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
3994                           mgp->cmd, mgp->cmd_bus);
3995
3996         free_netdev(netdev);
3997         pci_disable_device(pdev);
3998         pci_set_drvdata(pdev, NULL);
3999 }
4000
4001 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E      0x0008
4002 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9    0x0009
4003
4004 static struct pci_device_id myri10ge_pci_tbl[] = {
4005         {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)},
4006         {PCI_DEVICE
4007          (PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9)},
4008         {0},
4009 };
4010
4011 static struct pci_driver myri10ge_driver = {
4012         .name = "myri10ge",
4013         .probe = myri10ge_probe,
4014         .remove = myri10ge_remove,
4015         .id_table = myri10ge_pci_tbl,
4016 #ifdef CONFIG_PM
4017         .suspend = myri10ge_suspend,
4018         .resume = myri10ge_resume,
4019 #endif
4020 };
4021
4022 #ifdef CONFIG_MYRI10GE_DCA
4023 static int
4024 myri10ge_notify_dca(struct notifier_block *nb, unsigned long event, void *p)
4025 {
4026         int err = driver_for_each_device(&myri10ge_driver.driver,
4027                                          NULL, &event,
4028                                          myri10ge_notify_dca_device);
4029
4030         if (err)
4031                 return NOTIFY_BAD;
4032         return NOTIFY_DONE;
4033 }
4034
4035 static struct notifier_block myri10ge_dca_notifier = {
4036         .notifier_call = myri10ge_notify_dca,
4037         .next = NULL,
4038         .priority = 0,
4039 };
4040 #endif                          /* CONFIG_MYRI10GE_DCA */
4041
4042 static __init int myri10ge_init_module(void)
4043 {
4044         printk(KERN_INFO "%s: Version %s\n", myri10ge_driver.name,
4045                MYRI10GE_VERSION_STR);
4046
4047         if (myri10ge_rss_hash > MXGEFW_RSS_HASH_TYPE_MAX) {
4048                 printk(KERN_ERR
4049                        "%s: Illegal rssh hash type %d, defaulting to source port\n",
4050                        myri10ge_driver.name, myri10ge_rss_hash);
4051                 myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT;
4052         }
4053 #ifdef CONFIG_MYRI10GE_DCA
4054         dca_register_notify(&myri10ge_dca_notifier);
4055 #endif
4056         if (myri10ge_max_slices > MYRI10GE_MAX_SLICES)
4057                 myri10ge_max_slices = MYRI10GE_MAX_SLICES;
4058
4059         return pci_register_driver(&myri10ge_driver);
4060 }
4061
4062 module_init(myri10ge_init_module);
4063
4064 static __exit void myri10ge_cleanup_module(void)
4065 {
4066 #ifdef CONFIG_MYRI10GE_DCA
4067         dca_unregister_notify(&myri10ge_dca_notifier);
4068 #endif
4069         pci_unregister_driver(&myri10ge_driver);
4070 }
4071
4072 module_exit(myri10ge_cleanup_module);