drivers/net/ethernet/myricom/myri10ge/myri10ge.c

   1 /*************************************************************************
   2  * myri10ge.c: Myricom Myri-10G Ethernet driver.
   3  *
   4  * Copyright (C) 2005 - 2011 Myricom, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of Myricom, Inc. nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  20  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  23  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  *
  31  *
  32  * If the eeprom on your board is not recent enough, you will need to get a
  33  * newer firmware image at:
  34  *   http://www.myri.com/scs/download-Myri10GE.html
  35  *
  36  * Contact Information:
  37  *   <help@myri.com>
  38  *   Myricom, Inc., 325N Santa Anita Avenue, Arcadia, CA 91006
  39  *************************************************************************/
  40
  41 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  42
  43 #include <linux/tcp.h>
  44 #include <linux/netdevice.h>
  45 #include <linux/skbuff.h>
  46 #include <linux/string.h>
  47 #include <linux/module.h>
  48 #include <linux/pci.h>
  49 #include <linux/dma-mapping.h>
  50 #include <linux/etherdevice.h>
  51 #include <linux/if_ether.h>
  52 #include <linux/if_vlan.h>
  53 #include <linux/inet_lro.h>
  54 #include <linux/dca.h>
  55 #include <linux/ip.h>
  56 #include <linux/inet.h>
  57 #include <linux/in.h>
  58 #include <linux/ethtool.h>
  59 #include <linux/firmware.h>
  60 #include <linux/delay.h>
  61 #include <linux/timer.h>
  62 #include <linux/vmalloc.h>
  63 #include <linux/crc32.h>
  64 #include <linux/moduleparam.h>
  65 #include <linux/io.h>
  66 #include <linux/log2.h>
  67 #include <linux/slab.h>
  68 #include <linux/prefetch.h>
  69 #include <net/checksum.h>
  70 #include <net/ip.h>
  71 #include <net/tcp.h>
  72 #include <asm/byteorder.h>
  73 #include <asm/io.h>
  74 #include <asm/processor.h>
  75 #ifdef CONFIG_MTRR
  76 #include <asm/mtrr.h>
  77 #endif
  78
  79 #include "myri10ge_mcp.h"
  80 #include "myri10ge_mcp_gen_header.h"
  81
  82 #define MYRI10GE_VERSION_STR "1.5.3-1.534"
  83
  84 MODULE_DESCRIPTION("Myricom 10G driver (10GbE)");
  85 MODULE_AUTHOR("Maintainer: help@myri.com");
  86 MODULE_VERSION(MYRI10GE_VERSION_STR);
  87 MODULE_LICENSE("Dual BSD/GPL");
  88
  89 #define MYRI10GE_MAX_ETHER_MTU 9014
  90
  91 #define MYRI10GE_ETH_STOPPED 0
  92 #define MYRI10GE_ETH_STOPPING 1
  93 #define MYRI10GE_ETH_STARTING 2
  94 #define MYRI10GE_ETH_RUNNING 3
  95 #define MYRI10GE_ETH_OPEN_FAILED 4
  96
  97 #define MYRI10GE_EEPROM_STRINGS_SIZE 256
  98 #define MYRI10GE_MAX_SEND_DESC_TSO ((65536 / 2048) * 2)
  99 #define MYRI10GE_MAX_LRO_DESCRIPTORS 8
 100 #define MYRI10GE_LRO_MAX_PKTS 64
 101
 102 #define MYRI10GE_NO_CONFIRM_DATA htonl(0xffffffff)
 103 #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff
 104
 105 #define MYRI10GE_ALLOC_ORDER 0
 106 #define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE)
 107 #define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1)
 108
 109 #define MYRI10GE_MAX_SLICES 32
 110
 111 struct myri10ge_rx_buffer_state {
 112         struct page *page;
 113         int page_offset;
 114         DEFINE_DMA_UNMAP_ADDR(bus);
 115         DEFINE_DMA_UNMAP_LEN(len);
 116 };
 117
 118 struct myri10ge_tx_buffer_state {
 119         struct sk_buff *skb;
 120         int last;
 121         DEFINE_DMA_UNMAP_ADDR(bus);
 122         DEFINE_DMA_UNMAP_LEN(len);
 123 };
 124
 125 struct myri10ge_cmd {
 126         u32 data0;
 127         u32 data1;
 128         u32 data2;
 129 };
 130
 131 struct myri10ge_rx_buf {
 132         struct mcp_kreq_ether_recv __iomem *lanai;      /* lanai ptr for recv ring */
 133         struct mcp_kreq_ether_recv *shadow;     /* host shadow of recv ring */
 134         struct myri10ge_rx_buffer_state *info;
 135         struct page *page;
 136         dma_addr_t bus;
 137         int page_offset;
 138         int cnt;
 139         int fill_cnt;
 140         int alloc_fail;
 141         int mask;               /* number of rx slots -1 */
 142         int watchdog_needed;
 143 };
 144
 145 struct myri10ge_tx_buf {
 146         struct mcp_kreq_ether_send __iomem *lanai;      /* lanai ptr for sendq */
 147         __be32 __iomem *send_go;        /* "go" doorbell ptr */
 148         __be32 __iomem *send_stop;      /* "stop" doorbell ptr */
 149         struct mcp_kreq_ether_send *req_list;   /* host shadow of sendq */
 150         char *req_bytes;
 151         struct myri10ge_tx_buffer_state *info;
 152         int mask;               /* number of transmit slots -1  */
 153         int req ____cacheline_aligned;  /* transmit slots submitted     */
 154         int pkt_start;          /* packets started */
 155         int stop_queue;
 156         int linearized;
 157         int done ____cacheline_aligned; /* transmit slots completed     */
 158         int pkt_done;           /* packets completed */
 159         int wake_queue;
 160         int queue_active;
 161 };
 162
 163 struct myri10ge_rx_done {
 164         struct mcp_slot *entry;
 165         dma_addr_t bus;
 166         int cnt;
 167         int idx;
 168         struct net_lro_mgr lro_mgr;
 169         struct net_lro_desc lro_desc[MYRI10GE_MAX_LRO_DESCRIPTORS];
 170 };
 171
 172 struct myri10ge_slice_netstats {
 173         unsigned long rx_packets;
 174         unsigned long tx_packets;
 175         unsigned long rx_bytes;
 176         unsigned long tx_bytes;
 177         unsigned long rx_dropped;
 178         unsigned long tx_dropped;
 179 };
 180
 181 struct myri10ge_slice_state {
 182         struct myri10ge_tx_buf tx;      /* transmit ring        */
 183         struct myri10ge_rx_buf rx_small;
 184         struct myri10ge_rx_buf rx_big;
 185         struct myri10ge_rx_done rx_done;
 186         struct net_device *dev;
 187         struct napi_struct napi;
 188         struct myri10ge_priv *mgp;
 189         struct myri10ge_slice_netstats stats;
 190         __be32 __iomem *irq_claim;
 191         struct mcp_irq_data *fw_stats;
 192         dma_addr_t fw_stats_bus;
 193         int watchdog_tx_done;
 194         int watchdog_tx_req;
 195         int watchdog_rx_done;
 196         int stuck;
 197 #ifdef CONFIG_MYRI10GE_DCA
 198         int cached_dca_tag;
 199         int cpu;
 200         __be32 __iomem *dca_tag;
 201 #endif
 202         char irq_desc[32];
 203 };
 204
 205 struct myri10ge_priv {
 206         struct myri10ge_slice_state *ss;
 207         int tx_boundary;        /* boundary transmits cannot cross */
 208         int num_slices;
 209         int running;            /* running?             */
 210         int small_bytes;
 211         int big_bytes;
 212         int max_intr_slots;
 213         struct net_device *dev;
 214         u8 __iomem *sram;
 215         int sram_size;
 216         unsigned long board_span;
 217         unsigned long iomem_base;
 218         __be32 __iomem *irq_deassert;
 219         char *mac_addr_string;
 220         struct mcp_cmd_response *cmd;
 221         dma_addr_t cmd_bus;
 222         struct pci_dev *pdev;
 223         int msi_enabled;
 224         int msix_enabled;
 225         struct msix_entry *msix_vectors;
 226 #ifdef CONFIG_MYRI10GE_DCA
 227         int dca_enabled;
 228         int relaxed_order;
 229 #endif
 230         u32 link_state;
 231         unsigned int rdma_tags_available;
 232         int intr_coal_delay;
 233         __be32 __iomem *intr_coal_delay_ptr;
 234         int mtrr;
 235         int wc_enabled;
 236         int down_cnt;
 237         wait_queue_head_t down_wq;
 238         struct work_struct watchdog_work;
 239         struct timer_list watchdog_timer;
 240         int watchdog_resets;
 241         int watchdog_pause;
 242         int pause;
 243         bool fw_name_allocated;
 244         char *fw_name;
 245         char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
 246         char *product_code_string;
 247         char fw_version[128];
 248         int fw_ver_major;
 249         int fw_ver_minor;
 250         int fw_ver_tiny;
 251         int adopted_rx_filter_bug;
 252         u8 mac_addr[6];         /* eeprom mac address */
 253         unsigned long serial_number;
 254         int vendor_specific_offset;
 255         int fw_multicast_support;
 256         u32 features;
 257         u32 max_tso6;
 258         u32 read_dma;
 259         u32 write_dma;
 260         u32 read_write_dma;
 261         u32 link_changes;
 262         u32 msg_enable;
 263         unsigned int board_number;
 264         int rebooted;
 265 };
 266
 267 static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
 268 static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
 269 static char *myri10ge_fw_rss_unaligned = "myri10ge_rss_ethp_z8e.dat";
 270 static char *myri10ge_fw_rss_aligned = "myri10ge_rss_eth_z8e.dat";
 271 MODULE_FIRMWARE("myri10ge_ethp_z8e.dat");
 272 MODULE_FIRMWARE("myri10ge_eth_z8e.dat");
 273 MODULE_FIRMWARE("myri10ge_rss_ethp_z8e.dat");
 274 MODULE_FIRMWARE("myri10ge_rss_eth_z8e.dat");
 275
 276 /* Careful: must be accessed under kparam_block_sysfs_write */
 277 static char *myri10ge_fw_name = NULL;
 278 module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR);
 279 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name");
 280
 281 #define MYRI10GE_MAX_BOARDS 8
 282 static char *myri10ge_fw_names[MYRI10GE_MAX_BOARDS] =
 283     {[0 ... (MYRI10GE_MAX_BOARDS - 1)] = NULL };
 284 module_param_array_named(myri10ge_fw_names, myri10ge_fw_names, charp, NULL,
 285                          0444);
 286 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image names per board");
 287
 288 static int myri10ge_ecrc_enable = 1;
 289 module_param(myri10ge_ecrc_enable, int, S_IRUGO);
 290 MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E");
 291
 292 static int myri10ge_small_bytes = -1;   /* -1 == auto */
 293 module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR);
 294 MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets");
 295
 296 static int myri10ge_msi = 1;    /* enable msi by default */
 297 module_param(myri10ge_msi, int, S_IRUGO | S_IWUSR);
 298 MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts");
 299
 300 static int myri10ge_intr_coal_delay = 75;
 301 module_param(myri10ge_intr_coal_delay, int, S_IRUGO);
 302 MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay");
 303
 304 static int myri10ge_flow_control = 1;
 305 module_param(myri10ge_flow_control, int, S_IRUGO);
 306 MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter");
 307
 308 static int myri10ge_deassert_wait = 1;
 309 module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR);
 310 MODULE_PARM_DESC(myri10ge_deassert_wait,
 311                  "Wait when deasserting legacy interrupts");
 312
 313 static int myri10ge_force_firmware = 0;
 314 module_param(myri10ge_force_firmware, int, S_IRUGO);
 315 MODULE_PARM_DESC(myri10ge_force_firmware,
 316                  "Force firmware to assume aligned completions");
 317
 318 static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
 319 module_param(myri10ge_initial_mtu, int, S_IRUGO);
 320 MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU");
 321
 322 static int myri10ge_napi_weight = 64;
 323 module_param(myri10ge_napi_weight, int, S_IRUGO);
 324 MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight");
 325
 326 static int myri10ge_watchdog_timeout = 1;
 327 module_param(myri10ge_watchdog_timeout, int, S_IRUGO);
 328 MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout");
 329
 330 static int myri10ge_max_irq_loops = 1048576;
 331 module_param(myri10ge_max_irq_loops, int, S_IRUGO);
 332 MODULE_PARM_DESC(myri10ge_max_irq_loops,
 333                  "Set stuck legacy IRQ detection threshold");
 334
 335 #define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK
 336
 337 static int myri10ge_debug = -1; /* defaults above */
 338 module_param(myri10ge_debug, int, 0);
 339 MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)");
 340
 341 static int myri10ge_lro_max_pkts = MYRI10GE_LRO_MAX_PKTS;
 342 module_param(myri10ge_lro_max_pkts, int, S_IRUGO);
 343 MODULE_PARM_DESC(myri10ge_lro_max_pkts,
 344                  "Number of LRO packets to be aggregated");
 345
 346 static int myri10ge_fill_thresh = 256;
 347 module_param(myri10ge_fill_thresh, int, S_IRUGO | S_IWUSR);
 348 MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed");
 349
 350 static int myri10ge_reset_recover = 1;
 351
 352 static int myri10ge_max_slices = 1;
 353 module_param(myri10ge_max_slices, int, S_IRUGO);
 354 MODULE_PARM_DESC(myri10ge_max_slices, "Max tx/rx queues");
 355
 356 static int myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_DST_PORT;
 357 module_param(myri10ge_rss_hash, int, S_IRUGO);
 358 MODULE_PARM_DESC(myri10ge_rss_hash, "Type of RSS hashing to do");
 359
 360 static int myri10ge_dca = 1;
 361 module_param(myri10ge_dca, int, S_IRUGO);
 362 MODULE_PARM_DESC(myri10ge_dca, "Enable DCA if possible");
 363
 364 #define MYRI10GE_FW_OFFSET 1024*1024
 365 #define MYRI10GE_HIGHPART_TO_U32(X) \
 366 (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0)
 367 #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X))
 368
 369 #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8)
 370
 371 static void myri10ge_set_multicast_list(struct net_device *dev);
 372 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
 373                                          struct net_device *dev);
 374
 375 static inline void put_be32(__be32 val, __be32 __iomem * p)
 376 {
 377         __raw_writel((__force __u32) val, (__force void __iomem *)p);
 378 }
 379
 380 static struct rtnl_link_stats64 *myri10ge_get_stats(struct net_device *dev,
 381                                                     struct rtnl_link_stats64 *stats);
 382
 383 static void set_fw_name(struct myri10ge_priv *mgp, char *name, bool allocated)
 384 {
 385         if (mgp->fw_name_allocated)
 386                 kfree(mgp->fw_name);
 387         mgp->fw_name = name;
 388         mgp->fw_name_allocated = allocated;
 389 }
 390
 391 static int
 392 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
 393                   struct myri10ge_cmd *data, int atomic)
 394 {
 395         struct mcp_cmd *buf;
 396         char buf_bytes[sizeof(*buf) + 8];
 397         struct mcp_cmd_response *response = mgp->cmd;
 398         char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD;
 399         u32 dma_low, dma_high, result, value;
 400         int sleep_total = 0;
 401
 402         /* ensure buf is aligned to 8 bytes */
 403         buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8);
 404
 405         buf->data0 = htonl(data->data0);
 406         buf->data1 = htonl(data->data1);
 407         buf->data2 = htonl(data->data2);
 408         buf->cmd = htonl(cmd);
 409         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
 410         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
 411
 412         buf->response_addr.low = htonl(dma_low);
 413         buf->response_addr.high = htonl(dma_high);
 414         response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT);
 415         mb();
 416         myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf));
 417
 418         /* wait up to 15ms. Longest command is the DMA benchmark,
 419          * which is capped at 5ms, but runs from a timeout handler
 420          * that runs every 7.8ms. So a 15ms timeout leaves us with
 421          * a 2.2ms margin
 422          */
 423         if (atomic) {
 424                 /* if atomic is set, do not sleep,
 425                  * and try to get the completion quickly
 426                  * (1ms will be enough for those commands) */
 427                 for (sleep_total = 0;
 428                      sleep_total < 1000 &&
 429                      response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
 430                      sleep_total += 10) {
 431                         udelay(10);
 432                         mb();
 433                 }
 434         } else {
 435                 /* use msleep for most command */
 436                 for (sleep_total = 0;
 437                      sleep_total < 15 &&
 438                      response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
 439                      sleep_total++)
 440                         msleep(1);
 441         }
 442
 443         result = ntohl(response->result);
 444         value = ntohl(response->data);
 445         if (result != MYRI10GE_NO_RESPONSE_RESULT) {
 446                 if (result == 0) {
 447                         data->data0 = value;
 448                         return 0;
 449                 } else if (result == MXGEFW_CMD_UNKNOWN) {
 450                         return -ENOSYS;
 451                 } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) {
 452                         return -E2BIG;
 453                 } else if (result == MXGEFW_CMD_ERROR_RANGE &&
 454                            cmd == MXGEFW_CMD_ENABLE_RSS_QUEUES &&
 455                            (data->
 456                             data1 & MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES) !=
 457                            0) {
 458                         return -ERANGE;
 459                 } else {
 460                         dev_err(&mgp->pdev->dev,
 461                                 "command %d failed, result = %d\n",
 462                                 cmd, result);
 463                         return -ENXIO;
 464                 }
 465         }
 466
 467         dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
 468                 cmd, result);
 469         return -EAGAIN;
 470 }
 471
 472 /*
 473  * The eeprom strings on the lanaiX have the format
 474  * SN=x\0
 475  * MAC=x:x:x:x:x:x\0
 476  * PT:ddd mmm xx xx:xx:xx xx\0
 477  * PV:ddd mmm xx xx:xx:xx xx\0
 478  */
 479 static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp)
 480 {
 481         char *ptr, *limit;
 482         int i;
 483
 484         ptr = mgp->eeprom_strings;
 485         limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE;
 486
 487         while (*ptr != '\0' && ptr < limit) {
 488                 if (memcmp(ptr, "MAC=", 4) == 0) {
 489                         ptr += 4;
 490                         mgp->mac_addr_string = ptr;
 491                         for (i = 0; i < 6; i++) {
 492                                 if ((ptr + 2) > limit)
 493                                         goto abort;
 494                                 mgp->mac_addr[i] =
 495                                     simple_strtoul(ptr, &ptr, 16);
 496                                 ptr += 1;
 497                         }
 498                 }
 499                 if (memcmp(ptr, "PC=", 3) == 0) {
 500                         ptr += 3;
 501                         mgp->product_code_string = ptr;
 502                 }
 503                 if (memcmp((const void *)ptr, "SN=", 3) == 0) {
 504                         ptr += 3;
 505                         mgp->serial_number = simple_strtoul(ptr, &ptr, 10);
 506                 }
 507                 while (ptr < limit && *ptr++) ;
 508         }
 509
 510         return 0;
 511
 512 abort:
 513         dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n");
 514         return -ENXIO;
 515 }
 516
 517 /*
 518  * Enable or disable periodic RDMAs from the host to make certain
 519  * chipsets resend dropped PCIe messages
 520  */
 521
 522 static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable)
 523 {
 524         char __iomem *submit;
 525         __be32 buf[16] __attribute__ ((__aligned__(8)));
 526         u32 dma_low, dma_high;
 527         int i;
 528
 529         /* clear confirmation addr */
 530         mgp->cmd->data = 0;
 531         mb();
 532
 533         /* send a rdma command to the PCIe engine, and wait for the
 534          * response in the confirmation address.  The firmware should
 535          * write a -1 there to indicate it is alive and well
 536          */
 537         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
 538         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
 539
 540         buf[0] = htonl(dma_high);       /* confirm addr MSW */
 541         buf[1] = htonl(dma_low);        /* confirm addr LSW */
 542         buf[2] = MYRI10GE_NO_CONFIRM_DATA;      /* confirm data */
 543         buf[3] = htonl(dma_high);       /* dummy addr MSW */
 544         buf[4] = htonl(dma_low);        /* dummy addr LSW */
 545         buf[5] = htonl(enable); /* enable? */
 546
 547         submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA;
 548
 549         myri10ge_pio_copy(submit, &buf, sizeof(buf));
 550         for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++)
 551                 msleep(1);
 552         if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA)
 553                 dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n",
 554                         (enable ? "enable" : "disable"));
 555 }
 556
 557 static int
 558 myri10ge_validate_firmware(struct myri10ge_priv *mgp,
 559                            struct mcp_gen_header *hdr)
 560 {
 561         struct device *dev = &mgp->pdev->dev;
 562
 563         /* check firmware type */
 564         if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) {
 565                 dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type));
 566                 return -EINVAL;
 567         }
 568
 569         /* save firmware version for ethtool */
 570         strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
 571
 572         sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major,
 573                &mgp->fw_ver_minor, &mgp->fw_ver_tiny);
 574
 575         if (!(mgp->fw_ver_major == MXGEFW_VERSION_MAJOR &&
 576               mgp->fw_ver_minor == MXGEFW_VERSION_MINOR)) {
 577                 dev_err(dev, "Found firmware version %s\n", mgp->fw_version);
 578                 dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR,
 579                         MXGEFW_VERSION_MINOR);
 580                 return -EINVAL;
 581         }
 582         return 0;
 583 }
 584
 585 static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
 586 {
 587         unsigned crc, reread_crc;
 588         const struct firmware *fw;
 589         struct device *dev = &mgp->pdev->dev;
 590         unsigned char *fw_readback;
 591         struct mcp_gen_header *hdr;
 592         size_t hdr_offset;
 593         int status;
 594         unsigned i;
 595
 596         if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) {
 597                 dev_err(dev, "Unable to load %s firmware image via hotplug\n",
 598                         mgp->fw_name);
 599                 status = -EINVAL;
 600                 goto abort_with_nothing;
 601         }
 602
 603         /* check size */
 604
 605         if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET ||
 606             fw->size < MCP_HEADER_PTR_OFFSET + 4) {
 607                 dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size);
 608                 status = -EINVAL;
 609                 goto abort_with_fw;
 610         }
 611
 612         /* check id */
 613         hdr_offset = ntohl(*(__be32 *) (fw->data + MCP_HEADER_PTR_OFFSET));
 614         if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) {
 615                 dev_err(dev, "Bad firmware file\n");
 616                 status = -EINVAL;
 617                 goto abort_with_fw;
 618         }
 619         hdr = (void *)(fw->data + hdr_offset);
 620
 621         status = myri10ge_validate_firmware(mgp, hdr);
 622         if (status != 0)
 623                 goto abort_with_fw;
 624
 625         crc = crc32(~0, fw->data, fw->size);
 626         for (i = 0; i < fw->size; i += 256) {
 627                 myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i,
 628                                   fw->data + i,
 629                                   min(256U, (unsigned)(fw->size - i)));
 630                 mb();
 631                 readb(mgp->sram);
 632         }
 633         fw_readback = vmalloc(fw->size);
 634         if (!fw_readback) {
 635                 status = -ENOMEM;
 636                 goto abort_with_fw;
 637         }
 638         /* corruption checking is good for parity recovery and buggy chipset */
 639         memcpy_fromio(fw_readback, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);
 640         reread_crc = crc32(~0, fw_readback, fw->size);
 641         vfree(fw_readback);
 642         if (crc != reread_crc) {
 643                 dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n",
 644                         (unsigned)fw->size, reread_crc, crc);
 645                 status = -EIO;
 646                 goto abort_with_fw;
 647         }
 648         *size = (u32) fw->size;
 649
 650 abort_with_fw:
 651         release_firmware(fw);
 652
 653 abort_with_nothing:
 654         return status;
 655 }
 656
 657 static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp)
 658 {
 659         struct mcp_gen_header *hdr;
 660         struct device *dev = &mgp->pdev->dev;
 661         const size_t bytes = sizeof(struct mcp_gen_header);
 662         size_t hdr_offset;
 663         int status;
 664
 665         /* find running firmware header */
 666         hdr_offset = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
 667
 668         if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) {
 669                 dev_err(dev, "Running firmware has bad header offset (%d)\n",
 670                         (int)hdr_offset);
 671                 return -EIO;
 672         }
 673
 674         /* copy header of running firmware from SRAM to host memory to
 675          * validate firmware */
 676         hdr = kmalloc(bytes, GFP_KERNEL);
 677         if (hdr == NULL) {
 678                 dev_err(dev, "could not malloc firmware hdr\n");
 679                 return -ENOMEM;
 680         }
 681         memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes);
 682         status = myri10ge_validate_firmware(mgp, hdr);
 683         kfree(hdr);
 684
 685         /* check to see if adopted firmware has bug where adopting
 686          * it will cause broadcasts to be filtered unless the NIC
 687          * is kept in ALLMULTI mode */
 688         if (mgp->fw_ver_major == 1 && mgp->fw_ver_minor == 4 &&
 689             mgp->fw_ver_tiny >= 4 && mgp->fw_ver_tiny <= 11) {
 690                 mgp->adopted_rx_filter_bug = 1;
 691                 dev_warn(dev, "Adopting fw %d.%d.%d: "
 692                          "working around rx filter bug\n",
 693                          mgp->fw_ver_major, mgp->fw_ver_minor,
 694                          mgp->fw_ver_tiny);
 695         }
 696         return status;
 697 }
 698
 699 static int myri10ge_get_firmware_capabilities(struct myri10ge_priv *mgp)
 700 {
 701         struct myri10ge_cmd cmd;
 702         int status;
 703
 704         /* probe for IPv6 TSO support */
 705         mgp->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
 706         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_TSO6_HDR_SIZE,
 707                                    &cmd, 0);
 708         if (status == 0) {
 709                 mgp->max_tso6 = cmd.data0;
 710                 mgp->features |= NETIF_F_TSO6;
 711         }
 712
 713         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
 714         if (status != 0) {
 715                 dev_err(&mgp->pdev->dev,
 716                         "failed MXGEFW_CMD_GET_RX_RING_SIZE\n");
 717                 return -ENXIO;
 718         }
 719
 720         mgp->max_intr_slots = 2 * (cmd.data0 / sizeof(struct mcp_dma_addr));
 721
 722         return 0;
 723 }
 724
 725 static int myri10ge_load_firmware(struct myri10ge_priv *mgp, int adopt)
 726 {
 727         char __iomem *submit;
 728         __be32 buf[16] __attribute__ ((__aligned__(8)));
 729         u32 dma_low, dma_high, size;
 730         int status, i;
 731
 732         size = 0;
 733         status = myri10ge_load_hotplug_firmware(mgp, &size);
 734         if (status) {
 735                 if (!adopt)
 736                         return status;
 737                 dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n");
 738
 739                 /* Do not attempt to adopt firmware if there
 740                  * was a bad crc */
 741                 if (status == -EIO)
 742                         return status;
 743
 744                 status = myri10ge_adopt_running_firmware(mgp);
 745                 if (status != 0) {
 746                         dev_err(&mgp->pdev->dev,
 747                                 "failed to adopt running firmware\n");
 748                         return status;
 749                 }
 750                 dev_info(&mgp->pdev->dev,
 751                          "Successfully adopted running firmware\n");
 752                 if (mgp->tx_boundary == 4096) {
 753                         dev_warn(&mgp->pdev->dev,
 754                                  "Using firmware currently running on NIC"
 755                                  ".  For optimal\n");
 756                         dev_warn(&mgp->pdev->dev,
 757                                  "performance consider loading optimized "
 758                                  "firmware\n");
 759                         dev_warn(&mgp->pdev->dev, "via hotplug\n");
 760                 }
 761
 762                 set_fw_name(mgp, "adopted", false);
 763                 mgp->tx_boundary = 2048;
 764                 myri10ge_dummy_rdma(mgp, 1);
 765                 status = myri10ge_get_firmware_capabilities(mgp);
 766                 return status;
 767         }
 768
 769         /* clear confirmation addr */
 770         mgp->cmd->data = 0;
 771         mb();
 772
 773         /* send a reload command to the bootstrap MCP, and wait for the
 774          *  response in the confirmation address.  The firmware should
 775          * write a -1 there to indicate it is alive and well
 776          */
 777         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
 778         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
 779
 780         buf[0] = htonl(dma_high);       /* confirm addr MSW */
 781         buf[1] = htonl(dma_low);        /* confirm addr LSW */
 782         buf[2] = MYRI10GE_NO_CONFIRM_DATA;      /* confirm data */
 783
 784         /* FIX: All newest firmware should un-protect the bottom of
 785          * the sram before handoff. However, the very first interfaces
 786          * do not. Therefore the handoff copy must skip the first 8 bytes
 787          */
 788         buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */
 789         buf[4] = htonl(size - 8);       /* length of code */
 790         buf[5] = htonl(8);      /* where to copy to */
 791         buf[6] = htonl(0);      /* where to jump to */
 792
 793         submit = mgp->sram + MXGEFW_BOOT_HANDOFF;
 794
 795         myri10ge_pio_copy(submit, &buf, sizeof(buf));
 796         mb();
 797         msleep(1);
 798         mb();
 799         i = 0;
 800         while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 9) {
 801                 msleep(1 << i);
 802                 i++;
 803         }
 804         if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) {
 805                 dev_err(&mgp->pdev->dev, "handoff failed\n");
 806                 return -ENXIO;
 807         }
 808         myri10ge_dummy_rdma(mgp, 1);
 809         status = myri10ge_get_firmware_capabilities(mgp);
 810
 811         return status;
 812 }
 813
 814 static int myri10ge_update_mac_address(struct myri10ge_priv *mgp, u8 * addr)
 815 {
 816         struct myri10ge_cmd cmd;
 817         int status;
 818
 819         cmd.data0 = ((addr[0] << 24) | (addr[1] << 16)
 820                      | (addr[2] << 8) | addr[3]);
 821
 822         cmd.data1 = ((addr[4] << 8) | (addr[5]));
 823
 824         status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0);
 825         return status;
 826 }
 827
 828 static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause)
 829 {
 830         struct myri10ge_cmd cmd;
 831         int status, ctl;
 832
 833         ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL;
 834         status = myri10ge_send_cmd(mgp, ctl, &cmd, 0);
 835
 836         if (status) {
 837                 netdev_err(mgp->dev, "Failed to set flow control mode\n");
 838                 return status;
 839         }
 840         mgp->pause = pause;
 841         return 0;
 842 }
 843
 844 static void
 845 myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic)
 846 {
 847         struct myri10ge_cmd cmd;
 848         int status, ctl;
 849
 850         ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC;
 851         status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic);
 852         if (status)
 853                 netdev_err(mgp->dev, "Failed to set promisc mode\n");
 854 }
 855
 856 static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type)
 857 {
 858         struct myri10ge_cmd cmd;
 859         int status;
 860         u32 len;
 861         struct page *dmatest_page;
 862         dma_addr_t dmatest_bus;
 863         char *test = " ";
 864
 865         dmatest_page = alloc_page(GFP_KERNEL);
 866         if (!dmatest_page)
 867                 return -ENOMEM;
 868         dmatest_bus = pci_map_page(mgp->pdev, dmatest_page, 0, PAGE_SIZE,
 869                                    DMA_BIDIRECTIONAL);
 870
 871         /* Run a small DMA test.
 872          * The magic multipliers to the length tell the firmware
 873          * to do DMA read, write, or read+write tests.  The
 874          * results are returned in cmd.data0.  The upper 16
 875          * bits or the return is the number of transfers completed.
 876          * The lower 16 bits is the time in 0.5us ticks that the
 877          * transfers took to complete.
 878          */
 879
 880         len = mgp->tx_boundary;
 881
 882         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
 883         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
 884         cmd.data2 = len * 0x10000;
 885         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
 886         if (status != 0) {
 887                 test = "read";
 888                 goto abort;
 889         }
 890         mgp->read_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
 891         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
 892         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
 893         cmd.data2 = len * 0x1;
 894         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
 895         if (status != 0) {
 896                 test = "write";
 897                 goto abort;
 898         }
 899         mgp->write_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
 900
 901         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
 902         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
 903         cmd.data2 = len * 0x10001;
 904         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
 905         if (status != 0) {
 906                 test = "read/write";
 907                 goto abort;
 908         }
 909         mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) /
 910             (cmd.data0 & 0xffff);
 911
 912 abort:
 913         pci_unmap_page(mgp->pdev, dmatest_bus, PAGE_SIZE, DMA_BIDIRECTIONAL);
 914         put_page(dmatest_page);
 915
 916         if (status != 0 && test_type != MXGEFW_CMD_UNALIGNED_TEST)
 917                 dev_warn(&mgp->pdev->dev, "DMA %s benchmark failed: %d\n",
 918                          test, status);
 919
 920         return status;
 921 }
 922
 923 static int myri10ge_reset(struct myri10ge_priv *mgp)
 924 {
 925         struct myri10ge_cmd cmd;
 926         struct myri10ge_slice_state *ss;
 927         int i, status;
 928         size_t bytes;
 929 #ifdef CONFIG_MYRI10GE_DCA
 930         unsigned long dca_tag_off;
 931 #endif
 932
 933         /* try to send a reset command to the card to see if it
 934          * is alive */
 935         memset(&cmd, 0, sizeof(cmd));
 936         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
 937         if (status != 0) {
 938                 dev_err(&mgp->pdev->dev, "failed reset\n");
 939                 return -ENXIO;
 940         }
 941
 942         (void)myri10ge_dma_test(mgp, MXGEFW_DMA_TEST);
 943         /*
 944          * Use non-ndis mcp_slot (eg, 4 bytes total,
 945          * no toeplitz hash value returned.  Older firmware will
 946          * not understand this command, but will use the correct
 947          * sized mcp_slot, so we ignore error returns
 948          */
 949         cmd.data0 = MXGEFW_RSS_MCP_SLOT_TYPE_MIN;
 950         (void)myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_MCP_SLOT_TYPE, &cmd, 0);
 951
 952         /* Now exchange information about interrupts  */
 953
 954         bytes = mgp->max_intr_slots * sizeof(*mgp->ss[0].rx_done.entry);
 955         cmd.data0 = (u32) bytes;
 956         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
 957
 958         /*
 959          * Even though we already know how many slices are supported
 960          * via myri10ge_probe_slices() MXGEFW_CMD_GET_MAX_RSS_QUEUES
 961          * has magic side effects, and must be called after a reset.
 962          * It must be called prior to calling any RSS related cmds,
 963          * including assigning an interrupt queue for anything but
 964          * slice 0.  It must also be called *after*
 965          * MXGEFW_CMD_SET_INTRQ_SIZE, since the intrq size is used by
 966          * the firmware to compute offsets.
 967          */
 968
 969         if (mgp->num_slices > 1) {
 970
 971                 /* ask the maximum number of slices it supports */
 972                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES,
 973                                            &cmd, 0);
 974                 if (status != 0) {
 975                         dev_err(&mgp->pdev->dev,
 976                                 "failed to get number of slices\n");
 977                 }
 978
 979                 /*
 980                  * MXGEFW_CMD_ENABLE_RSS_QUEUES must be called prior
 981                  * to setting up the interrupt queue DMA
 982                  */
 983
 984                 cmd.data0 = mgp->num_slices;
 985                 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
 986                 if (mgp->dev->real_num_tx_queues > 1)
 987                         cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
 988                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
 989                                            &cmd, 0);
 990
 991                 /* Firmware older than 1.4.32 only supports multiple
 992                  * RX queues, so if we get an error, first retry using a
 993                  * single TX queue before giving up */
 994                 if (status != 0 && mgp->dev->real_num_tx_queues > 1) {
 995                         netif_set_real_num_tx_queues(mgp->dev, 1);
 996                         cmd.data0 = mgp->num_slices;
 997                         cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
 998                         status = myri10ge_send_cmd(mgp,
 999                                                    MXGEFW_CMD_ENABLE_RSS_QUEUES,
1000                                                    &cmd, 0);
1001                 }
1002
1003                 if (status != 0) {
1004                         dev_err(&mgp->pdev->dev,
1005                                 "failed to set number of slices\n");
1006
1007                         return status;
1008                 }
1009         }
1010         for (i = 0; i < mgp->num_slices; i++) {
1011                 ss = &mgp->ss[i];
1012                 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->rx_done.bus);
1013                 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->rx_done.bus);
1014                 cmd.data2 = i;
1015                 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA,
1016                                             &cmd, 0);
1017         }
1018
1019         status |=
1020             myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0);
1021         for (i = 0; i < mgp->num_slices; i++) {
1022                 ss = &mgp->ss[i];
1023                 ss->irq_claim =
1024                     (__iomem __be32 *) (mgp->sram + cmd.data0 + 8 * i);
1025         }
1026         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET,
1027                                     &cmd, 0);
1028         mgp->irq_deassert = (__iomem __be32 *) (mgp->sram + cmd.data0);
1029
1030         status |= myri10ge_send_cmd
1031             (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0);
1032         mgp->intr_coal_delay_ptr = (__iomem __be32 *) (mgp->sram + cmd.data0);
1033         if (status != 0) {
1034                 dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n");
1035                 return status;
1036         }
1037         put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1038
1039 #ifdef CONFIG_MYRI10GE_DCA
1040         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_DCA_OFFSET, &cmd, 0);
1041         dca_tag_off = cmd.data0;
1042         for (i = 0; i < mgp->num_slices; i++) {
1043                 ss = &mgp->ss[i];
1044                 if (status == 0) {
1045                         ss->dca_tag = (__iomem __be32 *)
1046                             (mgp->sram + dca_tag_off + 4 * i);
1047                 } else {
1048                         ss->dca_tag = NULL;
1049                 }
1050         }
1051 #endif                          /* CONFIG_MYRI10GE_DCA */
1052
1053         /* reset mcp/driver shared state back to 0 */
1054
1055         mgp->link_changes = 0;
1056         for (i = 0; i < mgp->num_slices; i++) {
1057                 ss = &mgp->ss[i];
1058
1059                 memset(ss->rx_done.entry, 0, bytes);
1060                 ss->tx.req = 0;
1061                 ss->tx.done = 0;
1062                 ss->tx.pkt_start = 0;
1063                 ss->tx.pkt_done = 0;
1064                 ss->rx_big.cnt = 0;
1065                 ss->rx_small.cnt = 0;
1066                 ss->rx_done.idx = 0;
1067                 ss->rx_done.cnt = 0;
1068                 ss->tx.wake_queue = 0;
1069                 ss->tx.stop_queue = 0;
1070         }
1071
1072         status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr);
1073         myri10ge_change_pause(mgp, mgp->pause);
1074         myri10ge_set_multicast_list(mgp->dev);
1075         return status;
1076 }
1077
1078 #ifdef CONFIG_MYRI10GE_DCA
1079 static int myri10ge_toggle_relaxed(struct pci_dev *pdev, int on)
1080 {
1081         int ret, cap, err;
1082         u16 ctl;
1083
1084         cap = pci_pcie_cap(pdev);
1085         if (!cap)
1086                 return 0;
1087
1088         err = pci_read_config_word(pdev, cap + PCI_EXP_DEVCTL, &ctl);
1089         if (err)
1090                 return 0;
1091
1092         ret = (ctl & PCI_EXP_DEVCTL_RELAX_EN) >> 4;
1093         if (ret != on) {
1094                 ctl &= ~PCI_EXP_DEVCTL_RELAX_EN;
1095                 ctl |= (on << 4);
1096                 pci_write_config_word(pdev, cap + PCI_EXP_DEVCTL, ctl);
1097         }
1098         return ret;
1099 }
1100
1101 static void
1102 myri10ge_write_dca(struct myri10ge_slice_state *ss, int cpu, int tag)
1103 {
1104         ss->cached_dca_tag = tag;
1105         put_be32(htonl(tag), ss->dca_tag);
1106 }
1107
1108 static inline void myri10ge_update_dca(struct myri10ge_slice_state *ss)
1109 {
1110         int cpu = get_cpu();
1111         int tag;
1112
1113         if (cpu != ss->cpu) {
1114                 tag = dca3_get_tag(&ss->mgp->pdev->dev, cpu);
1115                 if (ss->cached_dca_tag != tag)
1116                         myri10ge_write_dca(ss, cpu, tag);
1117                 ss->cpu = cpu;
1118         }
1119         put_cpu();
1120 }
1121
1122 static void myri10ge_setup_dca(struct myri10ge_priv *mgp)
1123 {
1124         int err, i;
1125         struct pci_dev *pdev = mgp->pdev;
1126
1127         if (mgp->ss[0].dca_tag == NULL || mgp->dca_enabled)
1128                 return;
1129         if (!myri10ge_dca) {
1130                 dev_err(&pdev->dev, "dca disabled by administrator\n");
1131                 return;
1132         }
1133         err = dca_add_requester(&pdev->dev);
1134         if (err) {
1135                 if (err != -ENODEV)
1136                         dev_err(&pdev->dev,
1137                                 "dca_add_requester() failed, err=%d\n", err);
1138                 return;
1139         }
1140         mgp->relaxed_order = myri10ge_toggle_relaxed(pdev, 0);
1141         mgp->dca_enabled = 1;
1142         for (i = 0; i < mgp->num_slices; i++) {
1143                 mgp->ss[i].cpu = -1;
1144                 mgp->ss[i].cached_dca_tag = -1;
1145                 myri10ge_update_dca(&mgp->ss[i]);
1146         }
1147 }
1148
1149 static void myri10ge_teardown_dca(struct myri10ge_priv *mgp)
1150 {
1151         struct pci_dev *pdev = mgp->pdev;
1152
1153         if (!mgp->dca_enabled)
1154                 return;
1155         mgp->dca_enabled = 0;
1156         if (mgp->relaxed_order)
1157                 myri10ge_toggle_relaxed(pdev, 1);
1158         dca_remove_requester(&pdev->dev);
1159 }
1160
1161 static int myri10ge_notify_dca_device(struct device *dev, void *data)
1162 {
1163         struct myri10ge_priv *mgp;
1164         unsigned long event;
1165
1166         mgp = dev_get_drvdata(dev);
1167         event = *(unsigned long *)data;
1168
1169         if (event == DCA_PROVIDER_ADD)
1170                 myri10ge_setup_dca(mgp);
1171         else if (event == DCA_PROVIDER_REMOVE)
1172                 myri10ge_teardown_dca(mgp);
1173         return 0;
1174 }
1175 #endif                          /* CONFIG_MYRI10GE_DCA */
1176
1177 static inline void
1178 myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst,
1179                     struct mcp_kreq_ether_recv *src)
1180 {
1181         __be32 low;
1182
1183         low = src->addr_low;
1184         src->addr_low = htonl(DMA_BIT_MASK(32));
1185         myri10ge_pio_copy(dst, src, 4 * sizeof(*src));
1186         mb();
1187         myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src));
1188         mb();
1189         src->addr_low = low;
1190         put_be32(low, &dst->addr_low);
1191         mb();
1192 }
1193
1194 static inline void myri10ge_vlan_ip_csum(struct sk_buff *skb, __wsum hw_csum)
1195 {
1196         struct vlan_hdr *vh = (struct vlan_hdr *)(skb->data);
1197
1198         if ((skb->protocol == htons(ETH_P_8021Q)) &&
1199             (vh->h_vlan_encapsulated_proto == htons(ETH_P_IP) ||
1200              vh->h_vlan_encapsulated_proto == htons(ETH_P_IPV6))) {
1201                 skb->csum = hw_csum;
1202                 skb->ip_summed = CHECKSUM_COMPLETE;
1203         }
1204 }
1205
1206 static inline void
1207 myri10ge_rx_skb_build(struct sk_buff *skb, u8 * va,
1208                       struct skb_frag_struct *rx_frags, int len, int hlen)
1209 {
1210         struct skb_frag_struct *skb_frags;
1211
1212         skb->len = skb->data_len = len;
1213         /* attach the page(s) */
1214
1215         skb_frags = skb_shinfo(skb)->frags;
1216         while (len > 0) {
1217                 memcpy(skb_frags, rx_frags, sizeof(*skb_frags));
1218                 len -= skb_frag_size(rx_frags);
1219                 skb_frags++;
1220                 rx_frags++;
1221                 skb_shinfo(skb)->nr_frags++;
1222         }
1223
1224         /* pskb_may_pull is not available in irq context, but
1225          * skb_pull() (for ether_pad and eth_type_trans()) requires
1226          * the beginning of the packet in skb_headlen(), move it
1227          * manually */
1228         skb_copy_to_linear_data(skb, va, hlen);
1229         skb_shinfo(skb)->frags[0].page_offset += hlen;
1230         skb_frag_size_sub(&skb_shinfo(skb)->frags[0], hlen);
1231         skb->data_len -= hlen;
1232         skb->tail += hlen;
1233         skb_pull(skb, MXGEFW_PAD);
1234 }
1235
1236 static void
1237 myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
1238                         int bytes, int watchdog)
1239 {
1240         struct page *page;
1241         int idx;
1242 #if MYRI10GE_ALLOC_SIZE > 4096
1243         int end_offset;
1244 #endif
1245
1246         if (unlikely(rx->watchdog_needed && !watchdog))
1247                 return;
1248
1249         /* try to refill entire ring */
1250         while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) {
1251                 idx = rx->fill_cnt & rx->mask;
1252                 if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) {
1253                         /* we can use part of previous page */
1254                         get_page(rx->page);
1255                 } else {
1256                         /* we need a new page */
1257                         page =
1258                             alloc_pages(GFP_ATOMIC | __GFP_COMP,
1259                                         MYRI10GE_ALLOC_ORDER);
1260                         if (unlikely(page == NULL)) {
1261                                 if (rx->fill_cnt - rx->cnt < 16)
1262                                         rx->watchdog_needed = 1;
1263                                 return;
1264                         }
1265                         rx->page = page;
1266                         rx->page_offset = 0;
1267                         rx->bus = pci_map_page(mgp->pdev, page, 0,
1268                                                MYRI10GE_ALLOC_SIZE,
1269                                                PCI_DMA_FROMDEVICE);
1270                 }
1271                 rx->info[idx].page = rx->page;
1272                 rx->info[idx].page_offset = rx->page_offset;
1273                 /* note that this is the address of the start of the
1274                  * page */
1275                 dma_unmap_addr_set(&rx->info[idx], bus, rx->bus);
1276                 rx->shadow[idx].addr_low =
1277                     htonl(MYRI10GE_LOWPART_TO_U32(rx->bus) + rx->page_offset);
1278                 rx->shadow[idx].addr_high =
1279                     htonl(MYRI10GE_HIGHPART_TO_U32(rx->bus));
1280
1281                 /* start next packet on a cacheline boundary */
1282                 rx->page_offset += SKB_DATA_ALIGN(bytes);
1283
1284 #if MYRI10GE_ALLOC_SIZE > 4096
1285                 /* don't cross a 4KB boundary */
1286                 end_offset = rx->page_offset + bytes - 1;
1287                 if ((unsigned)(rx->page_offset ^ end_offset) > 4095)
1288                         rx->page_offset = end_offset & ~4095;
1289 #endif
1290                 rx->fill_cnt++;
1291
1292                 /* copy 8 descriptors to the firmware at a time */
1293                 if ((idx & 7) == 7) {
1294                         myri10ge_submit_8rx(&rx->lanai[idx - 7],
1295                                             &rx->shadow[idx - 7]);
1296                 }
1297         }
1298 }
1299
1300 static inline void
1301 myri10ge_unmap_rx_page(struct pci_dev *pdev,
1302                        struct myri10ge_rx_buffer_state *info, int bytes)
1303 {
1304         /* unmap the recvd page if we're the only or last user of it */
1305         if (bytes >= MYRI10GE_ALLOC_SIZE / 2 ||
1306             (info->page_offset + 2 * bytes) > MYRI10GE_ALLOC_SIZE) {
1307                 pci_unmap_page(pdev, (dma_unmap_addr(info, bus)
1308                                       & ~(MYRI10GE_ALLOC_SIZE - 1)),
1309                                MYRI10GE_ALLOC_SIZE, PCI_DMA_FROMDEVICE);
1310         }
1311 }
1312
1313 #define MYRI10GE_HLEN 64        /* The number of bytes to copy from a
1314                                  * page into an skb */
1315
1316 static inline int
1317 myri10ge_rx_done(struct myri10ge_slice_state *ss, int len, __wsum csum,
1318                  bool lro_enabled)
1319 {
1320         struct myri10ge_priv *mgp = ss->mgp;
1321         struct sk_buff *skb;
1322         struct skb_frag_struct rx_frags[MYRI10GE_MAX_FRAGS_PER_FRAME];
1323         struct myri10ge_rx_buf *rx;
1324         int i, idx, hlen, remainder, bytes;
1325         struct pci_dev *pdev = mgp->pdev;
1326         struct net_device *dev = mgp->dev;
1327         u8 *va;
1328
1329         if (len <= mgp->small_bytes) {
1330                 rx = &ss->rx_small;
1331                 bytes = mgp->small_bytes;
1332         } else {
1333                 rx = &ss->rx_big;
1334                 bytes = mgp->big_bytes;
1335         }
1336
1337         len += MXGEFW_PAD;
1338         idx = rx->cnt & rx->mask;
1339         va = page_address(rx->info[idx].page) + rx->info[idx].page_offset;
1340         prefetch(va);
1341         /* Fill skb_frag_struct(s) with data from our receive */
1342         for (i = 0, remainder = len; remainder > 0; i++) {
1343                 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1344                 __skb_frag_set_page(&rx_frags[i], rx->info[idx].page);
1345                 rx_frags[i].page_offset = rx->info[idx].page_offset;
1346                 if (remainder < MYRI10GE_ALLOC_SIZE)
1347                         skb_frag_size_set(&rx_frags[i], remainder);
1348                 else
1349                         skb_frag_size_set(&rx_frags[i], MYRI10GE_ALLOC_SIZE);
1350                 rx->cnt++;
1351                 idx = rx->cnt & rx->mask;
1352                 remainder -= MYRI10GE_ALLOC_SIZE;
1353         }
1354
1355         if (lro_enabled) {
1356                 rx_frags[0].page_offset += MXGEFW_PAD;
1357                 skb_frag_size_sub(&rx_frags[0], MXGEFW_PAD);
1358                 len -= MXGEFW_PAD;
1359                 lro_receive_frags(&ss->rx_done.lro_mgr, rx_frags,
1360                                   /* opaque, will come back in get_frag_header */
1361                                   len, len,
1362                                   (void *)(__force unsigned long)csum, csum);
1363
1364                 return 1;
1365         }
1366
1367         hlen = MYRI10GE_HLEN > len ? len : MYRI10GE_HLEN;
1368
1369         /* allocate an skb to attach the page(s) to. This is done
1370          * after trying LRO, so as to avoid skb allocation overheads */
1371
1372         skb = netdev_alloc_skb(dev, MYRI10GE_HLEN + 16);
1373         if (unlikely(skb == NULL)) {
1374                 ss->stats.rx_dropped++;
1375                 do {
1376                         i--;
1377                         __skb_frag_unref(&rx_frags[i]);
1378                 } while (i != 0);
1379                 return 0;
1380         }
1381
1382         /* Attach the pages to the skb, and trim off any padding */
1383         myri10ge_rx_skb_build(skb, va, rx_frags, len, hlen);
1384         if (skb_frag_size(&skb_shinfo(skb)->frags[0]) <= 0) {
1385                 skb_frag_unref(skb, 0);
1386                 skb_shinfo(skb)->nr_frags = 0;
1387         } else {
1388                 skb->truesize += bytes * skb_shinfo(skb)->nr_frags;
1389         }
1390         skb->protocol = eth_type_trans(skb, dev);
1391         skb_record_rx_queue(skb, ss - &mgp->ss[0]);
1392
1393         if (dev->features & NETIF_F_RXCSUM) {
1394                 if ((skb->protocol == htons(ETH_P_IP)) ||
1395                     (skb->protocol == htons(ETH_P_IPV6))) {
1396                         skb->csum = csum;
1397                         skb->ip_summed = CHECKSUM_COMPLETE;
1398                 } else
1399                         myri10ge_vlan_ip_csum(skb, csum);
1400         }
1401         netif_receive_skb(skb);
1402         return 1;
1403 }
1404
1405 static inline void
1406 myri10ge_tx_done(struct myri10ge_slice_state *ss, int mcp_index)
1407 {
1408         struct pci_dev *pdev = ss->mgp->pdev;
1409         struct myri10ge_tx_buf *tx = &ss->tx;
1410         struct netdev_queue *dev_queue;
1411         struct sk_buff *skb;
1412         int idx, len;
1413
1414         while (tx->pkt_done != mcp_index) {
1415                 idx = tx->done & tx->mask;
1416                 skb = tx->info[idx].skb;
1417
1418                 /* Mark as free */
1419                 tx->info[idx].skb = NULL;
1420                 if (tx->info[idx].last) {
1421                         tx->pkt_done++;
1422                         tx->info[idx].last = 0;
1423                 }
1424                 tx->done++;
1425                 len = dma_unmap_len(&tx->info[idx], len);
1426                 dma_unmap_len_set(&tx->info[idx], len, 0);
1427                 if (skb) {
1428                         ss->stats.tx_bytes += skb->len;
1429                         ss->stats.tx_packets++;
1430                         dev_kfree_skb_irq(skb);
1431                         if (len)
1432                                 pci_unmap_single(pdev,
1433                                                  dma_unmap_addr(&tx->info[idx],
1434                                                                 bus), len,
1435                                                  PCI_DMA_TODEVICE);
1436                 } else {
1437                         if (len)
1438                                 pci_unmap_page(pdev,
1439                                                dma_unmap_addr(&tx->info[idx],
1440                                                               bus), len,
1441                                                PCI_DMA_TODEVICE);
1442                 }
1443         }
1444
1445         dev_queue = netdev_get_tx_queue(ss->dev, ss - ss->mgp->ss);
1446         /*
1447          * Make a minimal effort to prevent the NIC from polling an
1448          * idle tx queue.  If we can't get the lock we leave the queue
1449          * active. In this case, either a thread was about to start
1450          * using the queue anyway, or we lost a race and the NIC will
1451          * waste some of its resources polling an inactive queue for a
1452          * while.
1453          */
1454
1455         if ((ss->mgp->dev->real_num_tx_queues > 1) &&
1456             __netif_tx_trylock(dev_queue)) {
1457                 if (tx->req == tx->done) {
1458                         tx->queue_active = 0;
1459                         put_be32(htonl(1), tx->send_stop);
1460                         mb();
1461                         mmiowb();
1462                 }
1463                 __netif_tx_unlock(dev_queue);
1464         }
1465
1466         /* start the queue if we've stopped it */
1467         if (netif_tx_queue_stopped(dev_queue) &&
1468             tx->req - tx->done < (tx->mask >> 1) &&
1469             ss->mgp->running == MYRI10GE_ETH_RUNNING) {
1470                 tx->wake_queue++;
1471                 netif_tx_wake_queue(dev_queue);
1472         }
1473 }
1474
1475 static inline int
1476 myri10ge_clean_rx_done(struct myri10ge_slice_state *ss, int budget)
1477 {
1478         struct myri10ge_rx_done *rx_done = &ss->rx_done;
1479         struct myri10ge_priv *mgp = ss->mgp;
1480         unsigned long rx_bytes = 0;
1481         unsigned long rx_packets = 0;
1482         unsigned long rx_ok;
1483         int idx = rx_done->idx;
1484         int cnt = rx_done->cnt;
1485         int work_done = 0;
1486         u16 length;
1487         __wsum checksum;
1488
1489         /*
1490          * Prevent compiler from generating more than one ->features memory
1491          * access to avoid theoretical race condition with functions that
1492          * change NETIF_F_LRO flag at runtime.
1493          */
1494         bool lro_enabled = ACCESS_ONCE(mgp->dev->features) & NETIF_F_LRO;
1495
1496         while (rx_done->entry[idx].length != 0 && work_done < budget) {
1497                 length = ntohs(rx_done->entry[idx].length);
1498                 rx_done->entry[idx].length = 0;
1499                 checksum = csum_unfold(rx_done->entry[idx].checksum);
1500                 rx_ok = myri10ge_rx_done(ss, length, checksum, lro_enabled);
1501                 rx_packets += rx_ok;
1502                 rx_bytes += rx_ok * (unsigned long)length;
1503                 cnt++;
1504                 idx = cnt & (mgp->max_intr_slots - 1);
1505                 work_done++;
1506         }
1507         rx_done->idx = idx;
1508         rx_done->cnt = cnt;
1509         ss->stats.rx_packets += rx_packets;
1510         ss->stats.rx_bytes += rx_bytes;
1511
1512         if (lro_enabled)
1513                 lro_flush_all(&rx_done->lro_mgr);
1514
1515         /* restock receive rings if needed */
1516         if (ss->rx_small.fill_cnt - ss->rx_small.cnt < myri10ge_fill_thresh)
1517                 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
1518                                         mgp->small_bytes + MXGEFW_PAD, 0);
1519         if (ss->rx_big.fill_cnt - ss->rx_big.cnt < myri10ge_fill_thresh)
1520                 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
1521
1522         return work_done;
1523 }
1524
1525 static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
1526 {
1527         struct mcp_irq_data *stats = mgp->ss[0].fw_stats;
1528
1529         if (unlikely(stats->stats_updated)) {
1530                 unsigned link_up = ntohl(stats->link_up);
1531                 if (mgp->link_state != link_up) {
1532                         mgp->link_state = link_up;
1533
1534                         if (mgp->link_state == MXGEFW_LINK_UP) {
1535                                 netif_info(mgp, link, mgp->dev, "link up\n");
1536                                 netif_carrier_on(mgp->dev);
1537                                 mgp->link_changes++;
1538                         } else {
1539                                 netif_info(mgp, link, mgp->dev, "link %s\n",
1540                                            (link_up == MXGEFW_LINK_MYRINET ?
1541                                             "mismatch (Myrinet detected)" :
1542                                             "down"));
1543                                 netif_carrier_off(mgp->dev);
1544                                 mgp->link_changes++;
1545                         }
1546                 }
1547                 if (mgp->rdma_tags_available !=
1548                     ntohl(stats->rdma_tags_available)) {
1549                         mgp->rdma_tags_available =
1550                             ntohl(stats->rdma_tags_available);
1551                         netdev_warn(mgp->dev, "RDMA timed out! %d tags left\n",
1552                                     mgp->rdma_tags_available);
1553                 }
1554                 mgp->down_cnt += stats->link_down;
1555                 if (stats->link_down)
1556                         wake_up(&mgp->down_wq);
1557         }
1558 }
1559
1560 static int myri10ge_poll(struct napi_struct *napi, int budget)
1561 {
1562         struct myri10ge_slice_state *ss =
1563             container_of(napi, struct myri10ge_slice_state, napi);
1564         int work_done;
1565
1566 #ifdef CONFIG_MYRI10GE_DCA
1567         if (ss->mgp->dca_enabled)
1568                 myri10ge_update_dca(ss);
1569 #endif
1570
1571         /* process as many rx events as NAPI will allow */
1572         work_done = myri10ge_clean_rx_done(ss, budget);
1573
1574         if (work_done < budget) {
1575                 napi_complete(napi);
1576                 put_be32(htonl(3), ss->irq_claim);
1577         }
1578         return work_done;
1579 }
1580
1581 static irqreturn_t myri10ge_intr(int irq, void *arg)
1582 {
1583         struct myri10ge_slice_state *ss = arg;
1584         struct myri10ge_priv *mgp = ss->mgp;
1585         struct mcp_irq_data *stats = ss->fw_stats;
1586         struct myri10ge_tx_buf *tx = &ss->tx;
1587         u32 send_done_count;
1588         int i;
1589
1590         /* an interrupt on a non-zero receive-only slice is implicitly
1591          * valid  since MSI-X irqs are not shared */
1592         if ((mgp->dev->real_num_tx_queues == 1) && (ss != mgp->ss)) {
1593                 napi_schedule(&ss->napi);
1594                 return IRQ_HANDLED;
1595         }
1596
1597         /* make sure it is our IRQ, and that the DMA has finished */
1598         if (unlikely(!stats->valid))
1599                 return IRQ_NONE;
1600
1601         /* low bit indicates receives are present, so schedule
1602          * napi poll handler */
1603         if (stats->valid & 1)
1604                 napi_schedule(&ss->napi);
1605
1606         if (!mgp->msi_enabled && !mgp->msix_enabled) {
1607                 put_be32(0, mgp->irq_deassert);
1608                 if (!myri10ge_deassert_wait)
1609                         stats->valid = 0;
1610                 mb();
1611         } else
1612                 stats->valid = 0;
1613
1614         /* Wait for IRQ line to go low, if using INTx */
1615         i = 0;
1616         while (1) {
1617                 i++;
1618                 /* check for transmit completes and receives */
1619                 send_done_count = ntohl(stats->send_done_count);
1620                 if (send_done_count != tx->pkt_done)
1621                         myri10ge_tx_done(ss, (int)send_done_count);
1622                 if (unlikely(i > myri10ge_max_irq_loops)) {
1623                         netdev_warn(mgp->dev, "irq stuck?\n");
1624                         stats->valid = 0;
1625                         schedule_work(&mgp->watchdog_work);
1626                 }
1627                 if (likely(stats->valid == 0))
1628                         break;
1629                 cpu_relax();
1630                 barrier();
1631         }
1632
1633         /* Only slice 0 updates stats */
1634         if (ss == mgp->ss)
1635                 myri10ge_check_statblock(mgp);
1636
1637         put_be32(htonl(3), ss->irq_claim + 1);
1638         return IRQ_HANDLED;
1639 }
1640
1641 static int
1642 myri10ge_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
1643 {
1644         struct myri10ge_priv *mgp = netdev_priv(netdev);
1645         char *ptr;
1646         int i;
1647
1648         cmd->autoneg = AUTONEG_DISABLE;
1649         ethtool_cmd_speed_set(cmd, SPEED_10000);
1650         cmd->duplex = DUPLEX_FULL;
1651
1652         /*
1653          * parse the product code to deterimine the interface type
1654          * (CX4, XFP, Quad Ribbon Fiber) by looking at the character
1655          * after the 3rd dash in the driver's cached copy of the
1656          * EEPROM's product code string.
1657          */
1658         ptr = mgp->product_code_string;
1659         if (ptr == NULL) {
1660                 netdev_err(netdev, "Missing product code\n");
1661                 return 0;
1662         }
1663         for (i = 0; i < 3; i++, ptr++) {
1664                 ptr = strchr(ptr, '-');
1665                 if (ptr == NULL) {
1666                         netdev_err(netdev, "Invalid product code %s\n",
1667                                    mgp->product_code_string);
1668                         return 0;
1669                 }
1670         }
1671         if (*ptr == '2')
1672                 ptr++;
1673         if (*ptr == 'R' || *ptr == 'Q' || *ptr == 'S') {
1674                 /* We've found either an XFP, quad ribbon fiber, or SFP+ */
1675                 cmd->port = PORT_FIBRE;
1676                 cmd->supported |= SUPPORTED_FIBRE;
1677                 cmd->advertising |= ADVERTISED_FIBRE;
1678         } else {
1679                 cmd->port = PORT_OTHER;
1680         }
1681         if (*ptr == 'R' || *ptr == 'S')
1682                 cmd->transceiver = XCVR_EXTERNAL;
1683         else
1684                 cmd->transceiver = XCVR_INTERNAL;
1685
1686         return 0;
1687 }
1688
1689 static void
1690 myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
1691 {
1692         struct myri10ge_priv *mgp = netdev_priv(netdev);
1693
1694         strlcpy(info->driver, "myri10ge", sizeof(info->driver));
1695         strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version));
1696         strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version));
1697         strlcpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info));
1698 }
1699
1700 static int
1701 myri10ge_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1702 {
1703         struct myri10ge_priv *mgp = netdev_priv(netdev);
1704
1705         coal->rx_coalesce_usecs = mgp->intr_coal_delay;
1706         return 0;
1707 }
1708
1709 static int
1710 myri10ge_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1711 {
1712         struct myri10ge_priv *mgp = netdev_priv(netdev);
1713
1714         mgp->intr_coal_delay = coal->rx_coalesce_usecs;
1715         put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1716         return 0;
1717 }
1718
1719 static void
1720 myri10ge_get_pauseparam(struct net_device *netdev,
1721                         struct ethtool_pauseparam *pause)
1722 {
1723         struct myri10ge_priv *mgp = netdev_priv(netdev);
1724
1725         pause->autoneg = 0;
1726         pause->rx_pause = mgp->pause;
1727         pause->tx_pause = mgp->pause;
1728 }
1729
1730 static int
1731 myri10ge_set_pauseparam(struct net_device *netdev,
1732                         struct ethtool_pauseparam *pause)
1733 {
1734         struct myri10ge_priv *mgp = netdev_priv(netdev);
1735
1736         if (pause->tx_pause != mgp->pause)
1737                 return myri10ge_change_pause(mgp, pause->tx_pause);
1738         if (pause->rx_pause != mgp->pause)
1739                 return myri10ge_change_pause(mgp, pause->rx_pause);
1740         if (pause->autoneg != 0)
1741                 return -EINVAL;
1742         return 0;
1743 }
1744
1745 static void
1746 myri10ge_get_ringparam(struct net_device *netdev,
1747                        struct ethtool_ringparam *ring)
1748 {
1749         struct myri10ge_priv *mgp = netdev_priv(netdev);
1750
1751         ring->rx_mini_max_pending = mgp->ss[0].rx_small.mask + 1;
1752         ring->rx_max_pending = mgp->ss[0].rx_big.mask + 1;
1753         ring->rx_jumbo_max_pending = 0;
1754         ring->tx_max_pending = mgp->ss[0].tx.mask + 1;
1755         ring->rx_mini_pending = ring->rx_mini_max_pending;
1756         ring->rx_pending = ring->rx_max_pending;
1757         ring->rx_jumbo_pending = ring->rx_jumbo_max_pending;
1758         ring->tx_pending = ring->tx_max_pending;
1759 }
1760
1761 static const char myri10ge_gstrings_main_stats[][ETH_GSTRING_LEN] = {
1762         "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
1763         "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
1764         "rx_length_errors", "rx_over_errors", "rx_crc_errors",
1765         "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
1766         "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
1767         "tx_heartbeat_errors", "tx_window_errors",
1768         /* device-specific stats */
1769         "tx_boundary", "WC", "irq", "MSI", "MSIX",
1770         "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
1771         "serial_number", "watchdog_resets",
1772 #ifdef CONFIG_MYRI10GE_DCA
1773         "dca_capable_firmware", "dca_device_present",
1774 #endif
1775         "link_changes", "link_up", "dropped_link_overflow",
1776         "dropped_link_error_or_filtered",
1777         "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32",
1778         "dropped_unicast_filtered", "dropped_multicast_filtered",
1779         "dropped_runt", "dropped_overrun", "dropped_no_small_buffer",
1780         "dropped_no_big_buffer"
1781 };
1782
1783 static const char myri10ge_gstrings_slice_stats[][ETH_GSTRING_LEN] = {
1784         "----------- slice ---------",
1785         "tx_pkt_start", "tx_pkt_done", "tx_req", "tx_done",
1786         "rx_small_cnt", "rx_big_cnt",
1787         "wake_queue", "stop_queue", "tx_linearized",
1788         "LRO aggregated", "LRO flushed", "LRO avg aggr", "LRO no_desc",
1789 };
1790
1791 #define MYRI10GE_NET_STATS_LEN      21
1792 #define MYRI10GE_MAIN_STATS_LEN  ARRAY_SIZE(myri10ge_gstrings_main_stats)
1793 #define MYRI10GE_SLICE_STATS_LEN  ARRAY_SIZE(myri10ge_gstrings_slice_stats)
1794
1795 static void
1796 myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
1797 {
1798         struct myri10ge_priv *mgp = netdev_priv(netdev);
1799         int i;
1800
1801         switch (stringset) {
1802         case ETH_SS_STATS:
1803                 memcpy(data, *myri10ge_gstrings_main_stats,
1804                        sizeof(myri10ge_gstrings_main_stats));
1805                 data += sizeof(myri10ge_gstrings_main_stats);
1806                 for (i = 0; i < mgp->num_slices; i++) {
1807                         memcpy(data, *myri10ge_gstrings_slice_stats,
1808                                sizeof(myri10ge_gstrings_slice_stats));
1809                         data += sizeof(myri10ge_gstrings_slice_stats);
1810                 }
1811                 break;
1812         }
1813 }
1814
1815 static int myri10ge_get_sset_count(struct net_device *netdev, int sset)
1816 {
1817         struct myri10ge_priv *mgp = netdev_priv(netdev);
1818
1819         switch (sset) {
1820         case ETH_SS_STATS:
1821                 return MYRI10GE_MAIN_STATS_LEN +
1822                     mgp->num_slices * MYRI10GE_SLICE_STATS_LEN;
1823         default:
1824                 return -EOPNOTSUPP;
1825         }
1826 }
1827
1828 static void
1829 myri10ge_get_ethtool_stats(struct net_device *netdev,
1830                            struct ethtool_stats *stats, u64 * data)
1831 {
1832         struct myri10ge_priv *mgp = netdev_priv(netdev);
1833         struct myri10ge_slice_state *ss;
1834         struct rtnl_link_stats64 link_stats;
1835         int slice;
1836         int i;
1837
1838         /* force stats update */
1839         memset(&link_stats, 0, sizeof(link_stats));
1840         (void)myri10ge_get_stats(netdev, &link_stats);
1841         for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++)
1842                 data[i] = ((u64 *)&link_stats)[i];
1843
1844         data[i++] = (unsigned int)mgp->tx_boundary;
1845         data[i++] = (unsigned int)mgp->wc_enabled;
1846         data[i++] = (unsigned int)mgp->pdev->irq;
1847         data[i++] = (unsigned int)mgp->msi_enabled;
1848         data[i++] = (unsigned int)mgp->msix_enabled;
1849         data[i++] = (unsigned int)mgp->read_dma;
1850         data[i++] = (unsigned int)mgp->write_dma;
1851         data[i++] = (unsigned int)mgp->read_write_dma;
1852         data[i++] = (unsigned int)mgp->serial_number;
1853         data[i++] = (unsigned int)mgp->watchdog_resets;
1854 #ifdef CONFIG_MYRI10GE_DCA
1855         data[i++] = (unsigned int)(mgp->ss[0].dca_tag != NULL);
1856         data[i++] = (unsigned int)(mgp->dca_enabled);
1857 #endif
1858         data[i++] = (unsigned int)mgp->link_changes;
1859
1860         /* firmware stats are useful only in the first slice */
1861         ss = &mgp->ss[0];
1862         data[i++] = (unsigned int)ntohl(ss->fw_stats->link_up);
1863         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_link_overflow);
1864         data[i++] =
1865             (unsigned int)ntohl(ss->fw_stats->dropped_link_error_or_filtered);
1866         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_pause);
1867         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_phy);
1868         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_crc32);
1869         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_unicast_filtered);
1870         data[i++] =
1871             (unsigned int)ntohl(ss->fw_stats->dropped_multicast_filtered);
1872         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_runt);
1873         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_overrun);
1874         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_small_buffer);
1875         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_big_buffer);
1876
1877         for (slice = 0; slice < mgp->num_slices; slice++) {
1878                 ss = &mgp->ss[slice];
1879                 data[i++] = slice;
1880                 data[i++] = (unsigned int)ss->tx.pkt_start;
1881                 data[i++] = (unsigned int)ss->tx.pkt_done;
1882                 data[i++] = (unsigned int)ss->tx.req;
1883                 data[i++] = (unsigned int)ss->tx.done;
1884                 data[i++] = (unsigned int)ss->rx_small.cnt;
1885                 data[i++] = (unsigned int)ss->rx_big.cnt;
1886                 data[i++] = (unsigned int)ss->tx.wake_queue;
1887                 data[i++] = (unsigned int)ss->tx.stop_queue;
1888                 data[i++] = (unsigned int)ss->tx.linearized;
1889                 data[i++] = ss->rx_done.lro_mgr.stats.aggregated;
1890                 data[i++] = ss->rx_done.lro_mgr.stats.flushed;
1891                 if (ss->rx_done.lro_mgr.stats.flushed)
1892                         data[i++] = ss->rx_done.lro_mgr.stats.aggregated /
1893                             ss->rx_done.lro_mgr.stats.flushed;
1894                 else
1895                         data[i++] = 0;
1896                 data[i++] = ss->rx_done.lro_mgr.stats.no_desc;
1897         }
1898 }
1899
1900 static void myri10ge_set_msglevel(struct net_device *netdev, u32 value)
1901 {
1902         struct myri10ge_priv *mgp = netdev_priv(netdev);
1903         mgp->msg_enable = value;
1904 }
1905
1906 static u32 myri10ge_get_msglevel(struct net_device *netdev)
1907 {
1908         struct myri10ge_priv *mgp = netdev_priv(netdev);
1909         return mgp->msg_enable;
1910 }
1911
1912 /*
1913  * Use a low-level command to change the LED behavior. Rather than
1914  * blinking (which is the normal case), when identify is used, the
1915  * yellow LED turns solid.
1916  */
1917 static int myri10ge_led(struct myri10ge_priv *mgp, int on)
1918 {
1919         struct mcp_gen_header *hdr;
1920         struct device *dev = &mgp->pdev->dev;
1921         size_t hdr_off, pattern_off, hdr_len;
1922         u32 pattern = 0xfffffffe;
1923
1924         /* find running firmware header */
1925         hdr_off = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
1926         if ((hdr_off & 3) || hdr_off + sizeof(*hdr) > mgp->sram_size) {
1927                 dev_err(dev, "Running firmware has bad header offset (%d)\n",
1928                         (int)hdr_off);
1929                 return -EIO;
1930         }
1931         hdr_len = swab32(readl(mgp->sram + hdr_off +
1932                                offsetof(struct mcp_gen_header, header_length)));
1933         pattern_off = hdr_off + offsetof(struct mcp_gen_header, led_pattern);
1934         if (pattern_off >= (hdr_len + hdr_off)) {
1935                 dev_info(dev, "Firmware does not support LED identification\n");
1936                 return -EINVAL;
1937         }
1938         if (!on)
1939                 pattern = swab32(readl(mgp->sram + pattern_off + 4));
1940         writel(htonl(pattern), mgp->sram + pattern_off);
1941         return 0;
1942 }
1943
1944 static int
1945 myri10ge_phys_id(struct net_device *netdev, enum ethtool_phys_id_state state)
1946 {
1947         struct myri10ge_priv *mgp = netdev_priv(netdev);
1948         int rc;
1949
1950         switch (state) {
1951         case ETHTOOL_ID_ACTIVE:
1952                 rc = myri10ge_led(mgp, 1);
1953                 break;
1954
1955         case ETHTOOL_ID_INACTIVE:
1956                 rc =  myri10ge_led(mgp, 0);
1957                 break;
1958
1959         default:
1960                 rc = -EINVAL;
1961         }
1962
1963         return rc;
1964 }
1965
1966 static const struct ethtool_ops myri10ge_ethtool_ops = {
1967         .get_settings = myri10ge_get_settings,
1968         .get_drvinfo = myri10ge_get_drvinfo,
1969         .get_coalesce = myri10ge_get_coalesce,
1970         .set_coalesce = myri10ge_set_coalesce,
1971         .get_pauseparam = myri10ge_get_pauseparam,
1972         .set_pauseparam = myri10ge_set_pauseparam,
1973         .get_ringparam = myri10ge_get_ringparam,
1974         .get_link = ethtool_op_get_link,
1975         .get_strings = myri10ge_get_strings,
1976         .get_sset_count = myri10ge_get_sset_count,
1977         .get_ethtool_stats = myri10ge_get_ethtool_stats,
1978         .set_msglevel = myri10ge_set_msglevel,
1979         .get_msglevel = myri10ge_get_msglevel,
1980         .set_phys_id = myri10ge_phys_id,
1981 };
1982
1983 static int myri10ge_allocate_rings(struct myri10ge_slice_state *ss)
1984 {
1985         struct myri10ge_priv *mgp = ss->mgp;
1986         struct myri10ge_cmd cmd;
1987         struct net_device *dev = mgp->dev;
1988         int tx_ring_size, rx_ring_size;
1989         int tx_ring_entries, rx_ring_entries;
1990         int i, slice, status;
1991         size_t bytes;
1992
1993         /* get ring sizes */
1994         slice = ss - mgp->ss;
1995         cmd.data0 = slice;
1996         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0);
1997         tx_ring_size = cmd.data0;
1998         cmd.data0 = slice;
1999         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
2000         if (status != 0)
2001                 return status;
2002         rx_ring_size = cmd.data0;
2003
2004         tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send);
2005         rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr);
2006         ss->tx.mask = tx_ring_entries - 1;
2007         ss->rx_small.mask = ss->rx_big.mask = rx_ring_entries - 1;
2008
2009         status = -ENOMEM;
2010
2011         /* allocate the host shadow rings */
2012
2013         bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4)
2014             * sizeof(*ss->tx.req_list);
2015         ss->tx.req_bytes = kzalloc(bytes, GFP_KERNEL);
2016         if (ss->tx.req_bytes == NULL)
2017                 goto abort_with_nothing;
2018
2019         /* ensure req_list entries are aligned to 8 bytes */
2020         ss->tx.req_list = (struct mcp_kreq_ether_send *)
2021             ALIGN((unsigned long)ss->tx.req_bytes, 8);
2022         ss->tx.queue_active = 0;
2023
2024         bytes = rx_ring_entries * sizeof(*ss->rx_small.shadow);
2025         ss->rx_small.shadow = kzalloc(bytes, GFP_KERNEL);
2026         if (ss->rx_small.shadow == NULL)
2027                 goto abort_with_tx_req_bytes;
2028
2029         bytes = rx_ring_entries * sizeof(*ss->rx_big.shadow);
2030         ss->rx_big.shadow = kzalloc(bytes, GFP_KERNEL);
2031         if (ss->rx_big.shadow == NULL)
2032                 goto abort_with_rx_small_shadow;
2033
2034         /* allocate the host info rings */
2035
2036         bytes = tx_ring_entries * sizeof(*ss->tx.info);
2037         ss->tx.info = kzalloc(bytes, GFP_KERNEL);
2038         if (ss->tx.info == NULL)
2039                 goto abort_with_rx_big_shadow;
2040
2041         bytes = rx_ring_entries * sizeof(*ss->rx_small.info);
2042         ss->rx_small.info = kzalloc(bytes, GFP_KERNEL);
2043         if (ss->rx_small.info == NULL)
2044                 goto abort_with_tx_info;
2045
2046         bytes = rx_ring_entries * sizeof(*ss->rx_big.info);
2047         ss->rx_big.info = kzalloc(bytes, GFP_KERNEL);
2048         if (ss->rx_big.info == NULL)
2049                 goto abort_with_rx_small_info;
2050
2051         /* Fill the receive rings */
2052         ss->rx_big.cnt = 0;
2053         ss->rx_small.cnt = 0;
2054         ss->rx_big.fill_cnt = 0;
2055         ss->rx_small.fill_cnt = 0;
2056         ss->rx_small.page_offset = MYRI10GE_ALLOC_SIZE;
2057         ss->rx_big.page_offset = MYRI10GE_ALLOC_SIZE;
2058         ss->rx_small.watchdog_needed = 0;
2059         ss->rx_big.watchdog_needed = 0;
2060         if (mgp->small_bytes == 0) {
2061                 ss->rx_small.fill_cnt = ss->rx_small.mask + 1;
2062         } else {
2063                 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
2064                                         mgp->small_bytes + MXGEFW_PAD, 0);
2065         }
2066
2067         if (ss->rx_small.fill_cnt < ss->rx_small.mask + 1) {
2068                 netdev_err(dev, "slice-%d: alloced only %d small bufs\n",
2069                            slice, ss->rx_small.fill_cnt);
2070                 goto abort_with_rx_small_ring;
2071         }
2072
2073         myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
2074         if (ss->rx_big.fill_cnt < ss->rx_big.mask + 1) {
2075                 netdev_err(dev, "slice-%d: alloced only %d big bufs\n",
2076                            slice, ss->rx_big.fill_cnt);
2077                 goto abort_with_rx_big_ring;
2078         }
2079
2080         return 0;
2081
2082 abort_with_rx_big_ring:
2083         for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2084                 int idx = i & ss->rx_big.mask;
2085                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2086                                        mgp->big_bytes);
2087                 put_page(ss->rx_big.info[idx].page);
2088         }
2089
2090 abort_with_rx_small_ring:
2091         if (mgp->small_bytes == 0)
2092                 ss->rx_small.fill_cnt = ss->rx_small.cnt;
2093         for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2094                 int idx = i & ss->rx_small.mask;
2095                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2096                                        mgp->small_bytes + MXGEFW_PAD);
2097                 put_page(ss->rx_small.info[idx].page);
2098         }
2099
2100         kfree(ss->rx_big.info);
2101
2102 abort_with_rx_small_info:
2103         kfree(ss->rx_small.info);
2104
2105 abort_with_tx_info:
2106         kfree(ss->tx.info);
2107
2108 abort_with_rx_big_shadow:
2109         kfree(ss->rx_big.shadow);
2110
2111 abort_with_rx_small_shadow:
2112         kfree(ss->rx_small.shadow);
2113
2114 abort_with_tx_req_bytes:
2115         kfree(ss->tx.req_bytes);
2116         ss->tx.req_bytes = NULL;
2117         ss->tx.req_list = NULL;
2118
2119 abort_with_nothing:
2120         return status;
2121 }
2122
2123 static void myri10ge_free_rings(struct myri10ge_slice_state *ss)
2124 {
2125         struct myri10ge_priv *mgp = ss->mgp;
2126         struct sk_buff *skb;
2127         struct myri10ge_tx_buf *tx;
2128         int i, len, idx;
2129
2130         /* If not allocated, skip it */
2131         if (ss->tx.req_list == NULL)
2132                 return;
2133
2134         for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
2135                 idx = i & ss->rx_big.mask;
2136                 if (i == ss->rx_big.fill_cnt - 1)
2137                         ss->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE;
2138                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
2139                                        mgp->big_bytes);
2140                 put_page(ss->rx_big.info[idx].page);
2141         }
2142
2143         if (mgp->small_bytes == 0)
2144                 ss->rx_small.fill_cnt = ss->rx_small.cnt;
2145         for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2146                 idx = i & ss->rx_small.mask;
2147                 if (i == ss->rx_small.fill_cnt - 1)
2148                         ss->rx_small.info[idx].page_offset =
2149                             MYRI10GE_ALLOC_SIZE;
2150                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2151                                        mgp->small_bytes + MXGEFW_PAD);
2152                 put_page(ss->rx_small.info[idx].page);
2153         }
2154         tx = &ss->tx;
2155         while (tx->done != tx->req) {
2156                 idx = tx->done & tx->mask;
2157                 skb = tx->info[idx].skb;
2158
2159                 /* Mark as free */
2160                 tx->info[idx].skb = NULL;
2161                 tx->done++;
2162                 len = dma_unmap_len(&tx->info[idx], len);
2163                 dma_unmap_len_set(&tx->info[idx], len, 0);
2164                 if (skb) {
2165                         ss->stats.tx_dropped++;
2166                         dev_kfree_skb_any(skb);
2167                         if (len)
2168                                 pci_unmap_single(mgp->pdev,
2169                                                  dma_unmap_addr(&tx->info[idx],
2170                                                                 bus), len,
2171                                                  PCI_DMA_TODEVICE);
2172                 } else {
2173                         if (len)
2174                                 pci_unmap_page(mgp->pdev,
2175                                                dma_unmap_addr(&tx->info[idx],
2176                                                               bus), len,
2177                                                PCI_DMA_TODEVICE);
2178                 }
2179         }
2180         kfree(ss->rx_big.info);
2181
2182         kfree(ss->rx_small.info);
2183
2184         kfree(ss->tx.info);
2185
2186         kfree(ss->rx_big.shadow);
2187
2188         kfree(ss->rx_small.shadow);
2189
2190         kfree(ss->tx.req_bytes);
2191         ss->tx.req_bytes = NULL;
2192         ss->tx.req_list = NULL;
2193 }
2194
2195 static int myri10ge_request_irq(struct myri10ge_priv *mgp)
2196 {
2197         struct pci_dev *pdev = mgp->pdev;
2198         struct myri10ge_slice_state *ss;
2199         struct net_device *netdev = mgp->dev;
2200         int i;
2201         int status;
2202
2203         mgp->msi_enabled = 0;
2204         mgp->msix_enabled = 0;
2205         status = 0;
2206         if (myri10ge_msi) {
2207                 if (mgp->num_slices > 1) {
2208                         status =
2209                             pci_enable_msix(pdev, mgp->msix_vectors,
2210                                             mgp->num_slices);
2211                         if (status == 0) {
2212                                 mgp->msix_enabled = 1;
2213                         } else {
2214                                 dev_err(&pdev->dev,
2215                                         "Error %d setting up MSI-X\n", status);
2216                                 return status;
2217                         }
2218                 }
2219                 if (mgp->msix_enabled == 0) {
2220                         status = pci_enable_msi(pdev);
2221                         if (status != 0) {
2222                                 dev_err(&pdev->dev,
2223                                         "Error %d setting up MSI; falling back to xPIC\n",
2224                                         status);
2225                         } else {
2226                                 mgp->msi_enabled = 1;
2227                         }
2228                 }
2229         }
2230         if (mgp->msix_enabled) {
2231                 for (i = 0; i < mgp->num_slices; i++) {
2232                         ss = &mgp->ss[i];
2233                         snprintf(ss->irq_desc, sizeof(ss->irq_desc),
2234                                  "%s:slice-%d", netdev->name, i);
2235                         status = request_irq(mgp->msix_vectors[i].vector,
2236                                              myri10ge_intr, 0, ss->irq_desc,
2237                                              ss);
2238                         if (status != 0) {
2239                                 dev_err(&pdev->dev,
2240                                         "slice %d failed to allocate IRQ\n", i);
2241                                 i--;
2242                                 while (i >= 0) {
2243                                         free_irq(mgp->msix_vectors[i].vector,
2244                                                  &mgp->ss[i]);
2245                                         i--;
2246                                 }
2247                                 pci_disable_msix(pdev);
2248                                 return status;
2249                         }
2250                 }
2251         } else {
2252                 status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED,
2253                                      mgp->dev->name, &mgp->ss[0]);
2254                 if (status != 0) {
2255                         dev_err(&pdev->dev, "failed to allocate IRQ\n");
2256                         if (mgp->msi_enabled)
2257                                 pci_disable_msi(pdev);
2258                 }
2259         }
2260         return status;
2261 }
2262
2263 static void myri10ge_free_irq(struct myri10ge_priv *mgp)
2264 {
2265         struct pci_dev *pdev = mgp->pdev;
2266         int i;
2267
2268         if (mgp->msix_enabled) {
2269                 for (i = 0; i < mgp->num_slices; i++)
2270                         free_irq(mgp->msix_vectors[i].vector, &mgp->ss[i]);
2271         } else {
2272                 free_irq(pdev->irq, &mgp->ss[0]);
2273         }
2274         if (mgp->msi_enabled)
2275                 pci_disable_msi(pdev);
2276         if (mgp->msix_enabled)
2277                 pci_disable_msix(pdev);
2278 }
2279
2280 static int
2281 myri10ge_get_frag_header(struct skb_frag_struct *frag, void **mac_hdr,
2282                          void **ip_hdr, void **tcpudp_hdr,
2283                          u64 * hdr_flags, void *priv)
2284 {
2285         struct ethhdr *eh;
2286         struct vlan_ethhdr *veh;
2287         struct iphdr *iph;
2288         u8 *va = skb_frag_address(frag);
2289         unsigned long ll_hlen;
2290         /* passed opaque through lro_receive_frags() */
2291         __wsum csum = (__force __wsum) (unsigned long)priv;
2292
2293         /* find the mac header, aborting if not IPv4 */
2294
2295         eh = (struct ethhdr *)va;
2296         *mac_hdr = eh;
2297         ll_hlen = ETH_HLEN;
2298         if (eh->h_proto != htons(ETH_P_IP)) {
2299                 if (eh->h_proto == htons(ETH_P_8021Q)) {
2300                         veh = (struct vlan_ethhdr *)va;
2301                         if (veh->h_vlan_encapsulated_proto != htons(ETH_P_IP))
2302                                 return -1;
2303
2304                         ll_hlen += VLAN_HLEN;
2305
2306                         /*
2307                          *  HW checksum starts ETH_HLEN bytes into
2308                          *  frame, so we must subtract off the VLAN
2309                          *  header's checksum before csum can be used
2310                          */
2311                         csum = csum_sub(csum, csum_partial(va + ETH_HLEN,
2312                                                            VLAN_HLEN, 0));
2313                 } else {
2314                         return -1;
2315                 }
2316         }
2317         *hdr_flags = LRO_IPV4;
2318
2319         iph = (struct iphdr *)(va + ll_hlen);
2320         *ip_hdr = iph;
2321         if (iph->protocol != IPPROTO_TCP)
2322                 return -1;
2323         if (ip_is_fragment(iph))
2324                 return -1;
2325         *hdr_flags |= LRO_TCP;
2326         *tcpudp_hdr = (u8 *) (*ip_hdr) + (iph->ihl << 2);
2327
2328         /* verify the IP checksum */
2329         if (unlikely(ip_fast_csum((u8 *) iph, iph->ihl)))
2330                 return -1;
2331
2332         /* verify the  checksum */
2333         if (unlikely(csum_tcpudp_magic(iph->saddr, iph->daddr,
2334                                        ntohs(iph->tot_len) - (iph->ihl << 2),
2335                                        IPPROTO_TCP, csum)))
2336                 return -1;
2337
2338         return 0;
2339 }
2340
2341 static int myri10ge_get_txrx(struct myri10ge_priv *mgp, int slice)
2342 {
2343         struct myri10ge_cmd cmd;
2344         struct myri10ge_slice_state *ss;
2345         int status;
2346
2347         ss = &mgp->ss[slice];
2348         status = 0;
2349         if (slice == 0 || (mgp->dev->real_num_tx_queues > 1)) {
2350                 cmd.data0 = slice;
2351                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET,
2352                                            &cmd, 0);
2353                 ss->tx.lanai = (struct mcp_kreq_ether_send __iomem *)
2354                     (mgp->sram + cmd.data0);
2355         }
2356         cmd.data0 = slice;
2357         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET,
2358                                     &cmd, 0);
2359         ss->rx_small.lanai = (struct mcp_kreq_ether_recv __iomem *)
2360             (mgp->sram + cmd.data0);
2361
2362         cmd.data0 = slice;
2363         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0);
2364         ss->rx_big.lanai = (struct mcp_kreq_ether_recv __iomem *)
2365             (mgp->sram + cmd.data0);
2366
2367         ss->tx.send_go = (__iomem __be32 *)
2368             (mgp->sram + MXGEFW_ETH_SEND_GO + 64 * slice);
2369         ss->tx.send_stop = (__iomem __be32 *)
2370             (mgp->sram + MXGEFW_ETH_SEND_STOP + 64 * slice);
2371         return status;
2372
2373 }
2374
2375 static int myri10ge_set_stats(struct myri10ge_priv *mgp, int slice)
2376 {
2377         struct myri10ge_cmd cmd;
2378         struct myri10ge_slice_state *ss;
2379         int status;
2380
2381         ss = &mgp->ss[slice];
2382         cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->fw_stats_bus);
2383         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->fw_stats_bus);
2384         cmd.data2 = sizeof(struct mcp_irq_data) | (slice << 16);
2385         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0);
2386         if (status == -ENOSYS) {
2387                 dma_addr_t bus = ss->fw_stats_bus;
2388                 if (slice != 0)
2389                         return -EINVAL;
2390                 bus += offsetof(struct mcp_irq_data, send_done_count);
2391                 cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus);
2392                 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus);
2393                 status = myri10ge_send_cmd(mgp,
2394                                            MXGEFW_CMD_SET_STATS_DMA_OBSOLETE,
2395                                            &cmd, 0);
2396                 /* Firmware cannot support multicast without STATS_DMA_V2 */
2397                 mgp->fw_multicast_support = 0;
2398         } else {
2399                 mgp->fw_multicast_support = 1;
2400         }
2401         return 0;
2402 }
2403
2404 static int myri10ge_open(struct net_device *dev)
2405 {
2406         struct myri10ge_slice_state *ss;
2407         struct myri10ge_priv *mgp = netdev_priv(dev);
2408         struct myri10ge_cmd cmd;
2409         int i, status, big_pow2, slice;
2410         u8 *itable;
2411         struct net_lro_mgr *lro_mgr;
2412
2413         if (mgp->running != MYRI10GE_ETH_STOPPED)
2414                 return -EBUSY;
2415
2416         mgp->running = MYRI10GE_ETH_STARTING;
2417         status = myri10ge_reset(mgp);
2418         if (status != 0) {
2419                 netdev_err(dev, "failed reset\n");
2420                 goto abort_with_nothing;
2421         }
2422
2423         if (mgp->num_slices > 1) {
2424                 cmd.data0 = mgp->num_slices;
2425                 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE;
2426                 if (mgp->dev->real_num_tx_queues > 1)
2427                         cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES;
2428                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
2429                                            &cmd, 0);
2430                 if (status != 0) {
2431                         netdev_err(dev, "failed to set number of slices\n");
2432                         goto abort_with_nothing;
2433                 }
2434                 /* setup the indirection table */
2435                 cmd.data0 = mgp->num_slices;
2436                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_TABLE_SIZE,
2437                                            &cmd, 0);
2438
2439                 status |= myri10ge_send_cmd(mgp,
2440                                             MXGEFW_CMD_GET_RSS_TABLE_OFFSET,
2441                                             &cmd, 0);
2442                 if (status != 0) {
2443                         netdev_err(dev, "failed to setup rss tables\n");
2444                         goto abort_with_nothing;
2445                 }
2446
2447                 /* just enable an identity mapping */
2448                 itable = mgp->sram + cmd.data0;
2449                 for (i = 0; i < mgp->num_slices; i++)
2450                         __raw_writeb(i, &itable[i]);
2451
2452                 cmd.data0 = 1;
2453                 cmd.data1 = myri10ge_rss_hash;
2454                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_ENABLE,
2455                                            &cmd, 0);
2456                 if (status != 0) {
2457                         netdev_err(dev, "failed to enable slices\n");
2458                         goto abort_with_nothing;
2459                 }
2460         }
2461
2462         status = myri10ge_request_irq(mgp);
2463         if (status != 0)
2464                 goto abort_with_nothing;
2465
2466         /* decide what small buffer size to use.  For good TCP rx
2467          * performance, it is important to not receive 1514 byte
2468          * frames into jumbo buffers, as it confuses the socket buffer
2469          * accounting code, leading to drops and erratic performance.
2470          */
2471
2472         if (dev->mtu <= ETH_DATA_LEN)
2473                 /* enough for a TCP header */
2474                 mgp->small_bytes = (128 > SMP_CACHE_BYTES)
2475                     ? (128 - MXGEFW_PAD)
2476                     : (SMP_CACHE_BYTES - MXGEFW_PAD);
2477         else
2478                 /* enough for a vlan encapsulated ETH_DATA_LEN frame */
2479                 mgp->small_bytes = VLAN_ETH_FRAME_LEN;
2480
2481         /* Override the small buffer size? */
2482         if (myri10ge_small_bytes >= 0)
2483                 mgp->small_bytes = myri10ge_small_bytes;
2484
2485         /* Firmware needs the big buff size as a power of 2.  Lie and
2486          * tell him the buffer is larger, because we only use 1
2487          * buffer/pkt, and the mtu will prevent overruns.
2488          */
2489         big_pow2 = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2490         if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) {
2491                 while (!is_power_of_2(big_pow2))
2492                         big_pow2++;
2493                 mgp->big_bytes = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2494         } else {
2495                 big_pow2 = MYRI10GE_ALLOC_SIZE;
2496                 mgp->big_bytes = big_pow2;
2497         }
2498
2499         /* setup the per-slice data structures */
2500         for (slice = 0; slice < mgp->num_slices; slice++) {
2501                 ss = &mgp->ss[slice];
2502
2503                 status = myri10ge_get_txrx(mgp, slice);
2504                 if (status != 0) {
2505                         netdev_err(dev, "failed to get ring sizes or locations\n");
2506                         goto abort_with_rings;
2507                 }
2508                 status = myri10ge_allocate_rings(ss);
2509                 if (status != 0)
2510                         goto abort_with_rings;
2511
2512                 /* only firmware which supports multiple TX queues
2513                  * supports setting up the tx stats on non-zero
2514                  * slices */
2515                 if (slice == 0 || mgp->dev->real_num_tx_queues > 1)
2516                         status = myri10ge_set_stats(mgp, slice);
2517                 if (status) {
2518                         netdev_err(dev, "Couldn't set stats DMA\n");
2519                         goto abort_with_rings;
2520                 }
2521
2522                 lro_mgr = &ss->rx_done.lro_mgr;
2523                 lro_mgr->dev = dev;
2524                 lro_mgr->features = LRO_F_NAPI;
2525                 lro_mgr->ip_summed = CHECKSUM_COMPLETE;
2526                 lro_mgr->ip_summed_aggr = CHECKSUM_UNNECESSARY;
2527                 lro_mgr->max_desc = MYRI10GE_MAX_LRO_DESCRIPTORS;
2528                 lro_mgr->lro_arr = ss->rx_done.lro_desc;
2529                 lro_mgr->get_frag_header = myri10ge_get_frag_header;
2530                 lro_mgr->max_aggr = myri10ge_lro_max_pkts;
2531                 lro_mgr->frag_align_pad = 2;
2532                 if (lro_mgr->max_aggr > MAX_SKB_FRAGS)
2533                         lro_mgr->max_aggr = MAX_SKB_FRAGS;
2534
2535                 /* must happen prior to any irq */
2536                 napi_enable(&(ss)->napi);
2537         }
2538
2539         /* now give firmware buffers sizes, and MTU */
2540         cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
2541         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0);
2542         cmd.data0 = mgp->small_bytes;
2543         status |=
2544             myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0);
2545         cmd.data0 = big_pow2;
2546         status |=
2547             myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0);
2548         if (status) {
2549                 netdev_err(dev, "Couldn't set buffer sizes\n");
2550                 goto abort_with_rings;
2551         }
2552
2553         /*
2554          * Set Linux style TSO mode; this is needed only on newer
2555          *  firmware versions.  Older versions default to Linux
2556          *  style TSO
2557          */
2558         cmd.data0 = 0;
2559         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_TSO_MODE, &cmd, 0);
2560         if (status && status != -ENOSYS) {
2561                 netdev_err(dev, "Couldn't set TSO mode\n");
2562                 goto abort_with_rings;
2563         }
2564
2565         mgp->link_state = ~0U;
2566         mgp->rdma_tags_available = 15;
2567
2568         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0);
2569         if (status) {
2570                 netdev_err(dev, "Couldn't bring up link\n");
2571                 goto abort_with_rings;
2572         }
2573
2574         mgp->running = MYRI10GE_ETH_RUNNING;
2575         mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ;
2576         add_timer(&mgp->watchdog_timer);
2577         netif_tx_wake_all_queues(dev);
2578
2579         return 0;
2580
2581 abort_with_rings:
2582         while (slice) {
2583                 slice--;
2584                 napi_disable(&mgp->ss[slice].napi);
2585         }
2586         for (i = 0; i < mgp->num_slices; i++)
2587                 myri10ge_free_rings(&mgp->ss[i]);
2588
2589         myri10ge_free_irq(mgp);
2590
2591 abort_with_nothing:
2592         mgp->running = MYRI10GE_ETH_STOPPED;
2593         return -ENOMEM;
2594 }
2595
2596 static int myri10ge_close(struct net_device *dev)
2597 {
2598         struct myri10ge_priv *mgp = netdev_priv(dev);
2599         struct myri10ge_cmd cmd;
2600         int status, old_down_cnt;
2601         int i;
2602
2603         if (mgp->running != MYRI10GE_ETH_RUNNING)
2604                 return 0;
2605
2606         if (mgp->ss[0].tx.req_bytes == NULL)
2607                 return 0;
2608
2609         del_timer_sync(&mgp->watchdog_timer);
2610         mgp->running = MYRI10GE_ETH_STOPPING;
2611         for (i = 0; i < mgp->num_slices; i++) {
2612                 napi_disable(&mgp->ss[i].napi);
2613         }
2614         netif_carrier_off(dev);
2615
2616         netif_tx_stop_all_queues(dev);
2617         if (mgp->rebooted == 0) {
2618                 old_down_cnt = mgp->down_cnt;
2619                 mb();
2620                 status =
2621                     myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0);
2622                 if (status)
2623                         netdev_err(dev, "Couldn't bring down link\n");
2624
2625                 wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt,
2626                                    HZ);
2627                 if (old_down_cnt == mgp->down_cnt)
2628                         netdev_err(dev, "never got down irq\n");
2629         }
2630         netif_tx_disable(dev);
2631         myri10ge_free_irq(mgp);
2632         for (i = 0; i < mgp->num_slices; i++)
2633                 myri10ge_free_rings(&mgp->ss[i]);
2634
2635         mgp->running = MYRI10GE_ETH_STOPPED;
2636         return 0;
2637 }
2638
2639 /* copy an array of struct mcp_kreq_ether_send's to the mcp.  Copy
2640  * backwards one at a time and handle ring wraps */
2641
2642 static inline void
2643 myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx,
2644                               struct mcp_kreq_ether_send *src, int cnt)
2645 {
2646         int idx, starting_slot;
2647         starting_slot = tx->req;
2648         while (cnt > 1) {
2649                 cnt--;
2650                 idx = (starting_slot + cnt) & tx->mask;
2651                 myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src));
2652                 mb();
2653         }
2654 }
2655
2656 /*
2657  * copy an array of struct mcp_kreq_ether_send's to the mcp.  Copy
2658  * at most 32 bytes at a time, so as to avoid involving the software
2659  * pio handler in the nic.   We re-write the first segment's flags
2660  * to mark them valid only after writing the entire chain.
2661  */
2662
2663 static inline void
2664 myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src,
2665                     int cnt)
2666 {
2667         int idx, i;
2668         struct mcp_kreq_ether_send __iomem *dstp, *dst;
2669         struct mcp_kreq_ether_send *srcp;
2670         u8 last_flags;
2671
2672         idx = tx->req & tx->mask;
2673
2674         last_flags = src->flags;
2675         src->flags = 0;
2676         mb();
2677         dst = dstp = &tx->lanai[idx];
2678         srcp = src;
2679
2680         if ((idx + cnt) < tx->mask) {
2681                 for (i = 0; i < (cnt - 1); i += 2) {
2682                         myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src));
2683                         mb();   /* force write every 32 bytes */
2684                         srcp += 2;
2685                         dstp += 2;
2686                 }
2687         } else {
2688                 /* submit all but the first request, and ensure
2689                  * that it is submitted below */
2690                 myri10ge_submit_req_backwards(tx, src, cnt);
2691                 i = 0;
2692         }
2693         if (i < cnt) {
2694                 /* submit the first request */
2695                 myri10ge_pio_copy(dstp, srcp, sizeof(*src));
2696                 mb();           /* barrier before setting valid flag */
2697         }
2698
2699         /* re-write the last 32-bits with the valid flags */
2700         src->flags = last_flags;
2701         put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3);
2702         tx->req += cnt;
2703         mb();
2704 }
2705
2706 /*
2707  * Transmit a packet.  We need to split the packet so that a single
2708  * segment does not cross myri10ge->tx_boundary, so this makes segment
2709  * counting tricky.  So rather than try to count segments up front, we
2710  * just give up if there are too few segments to hold a reasonably
2711  * fragmented packet currently available.  If we run
2712  * out of segments while preparing a packet for DMA, we just linearize
2713  * it and try again.
2714  */
2715
2716 static netdev_tx_t myri10ge_xmit(struct sk_buff *skb,
2717                                        struct net_device *dev)
2718 {
2719         struct myri10ge_priv *mgp = netdev_priv(dev);
2720         struct myri10ge_slice_state *ss;
2721         struct mcp_kreq_ether_send *req;
2722         struct myri10ge_tx_buf *tx;
2723         struct skb_frag_struct *frag;
2724         struct netdev_queue *netdev_queue;
2725         dma_addr_t bus;
2726         u32 low;
2727         __be32 high_swapped;
2728         unsigned int len;
2729         int idx, last_idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
2730         u16 pseudo_hdr_offset, cksum_offset, queue;
2731         int cum_len, seglen, boundary, rdma_count;
2732         u8 flags, odd_flag;
2733
2734         queue = skb_get_queue_mapping(skb);
2735         ss = &mgp->ss[queue];
2736         netdev_queue = netdev_get_tx_queue(mgp->dev, queue);
2737         tx = &ss->tx;
2738
2739 again:
2740         req = tx->req_list;
2741         avail = tx->mask - 1 - (tx->req - tx->done);
2742
2743         mss = 0;
2744         max_segments = MXGEFW_MAX_SEND_DESC;
2745
2746         if (skb_is_gso(skb)) {
2747                 mss = skb_shinfo(skb)->gso_size;
2748                 max_segments = MYRI10GE_MAX_SEND_DESC_TSO;
2749         }
2750
2751         if ((unlikely(avail < max_segments))) {
2752                 /* we are out of transmit resources */
2753                 tx->stop_queue++;
2754                 netif_tx_stop_queue(netdev_queue);
2755                 return NETDEV_TX_BUSY;
2756         }
2757
2758         /* Setup checksum offloading, if needed */
2759         cksum_offset = 0;
2760         pseudo_hdr_offset = 0;
2761         odd_flag = 0;
2762         flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
2763         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2764                 cksum_offset = skb_checksum_start_offset(skb);
2765                 pseudo_hdr_offset = cksum_offset + skb->csum_offset;
2766                 /* If the headers are excessively large, then we must
2767                  * fall back to a software checksum */
2768                 if (unlikely(!mss && (cksum_offset > 255 ||
2769                                       pseudo_hdr_offset > 127))) {
2770                         if (skb_checksum_help(skb))
2771                                 goto drop;
2772                         cksum_offset = 0;
2773                         pseudo_hdr_offset = 0;
2774                 } else {
2775                         odd_flag = MXGEFW_FLAGS_ALIGN_ODD;
2776                         flags |= MXGEFW_FLAGS_CKSUM;
2777                 }
2778         }
2779
2780         cum_len = 0;
2781
2782         if (mss) {              /* TSO */
2783                 /* this removes any CKSUM flag from before */
2784                 flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST);
2785
2786                 /* negative cum_len signifies to the
2787                  * send loop that we are still in the
2788                  * header portion of the TSO packet.
2789                  * TSO header can be at most 1KB long */
2790                 cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb));
2791
2792                 /* for IPv6 TSO, the checksum offset stores the
2793                  * TCP header length, to save the firmware from
2794                  * the need to parse the headers */
2795                 if (skb_is_gso_v6(skb)) {
2796                         cksum_offset = tcp_hdrlen(skb);
2797                         /* Can only handle headers <= max_tso6 long */
2798                         if (unlikely(-cum_len > mgp->max_tso6))
2799                                 return myri10ge_sw_tso(skb, dev);
2800                 }
2801                 /* for TSO, pseudo_hdr_offset holds mss.
2802                  * The firmware figures out where to put
2803                  * the checksum by parsing the header. */
2804                 pseudo_hdr_offset = mss;
2805         } else
2806                 /* Mark small packets, and pad out tiny packets */
2807         if (skb->len <= MXGEFW_SEND_SMALL_SIZE) {
2808                 flags |= MXGEFW_FLAGS_SMALL;
2809
2810                 /* pad frames to at least ETH_ZLEN bytes */
2811                 if (unlikely(skb->len < ETH_ZLEN)) {
2812                         if (skb_padto(skb, ETH_ZLEN)) {
2813                                 /* The packet is gone, so we must
2814                                  * return 0 */
2815                                 ss->stats.tx_dropped += 1;
2816                                 return NETDEV_TX_OK;
2817                         }
2818                         /* adjust the len to account for the zero pad
2819                          * so that the nic can know how long it is */
2820                         skb->len = ETH_ZLEN;
2821                 }
2822         }
2823
2824         /* map the skb for DMA */
2825         len = skb_headlen(skb);
2826         idx = tx->req & tx->mask;
2827         tx->info[idx].skb = skb;
2828         bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE);
2829         dma_unmap_addr_set(&tx->info[idx], bus, bus);
2830         dma_unmap_len_set(&tx->info[idx], len, len);
2831
2832         frag_cnt = skb_shinfo(skb)->nr_frags;
2833         frag_idx = 0;
2834         count = 0;
2835         rdma_count = 0;
2836
2837         /* "rdma_count" is the number of RDMAs belonging to the
2838          * current packet BEFORE the current send request. For
2839          * non-TSO packets, this is equal to "count".
2840          * For TSO packets, rdma_count needs to be reset
2841          * to 0 after a segment cut.
2842          *
2843          * The rdma_count field of the send request is
2844          * the number of RDMAs of the packet starting at
2845          * that request. For TSO send requests with one ore more cuts
2846          * in the middle, this is the number of RDMAs starting
2847          * after the last cut in the request. All previous
2848          * segments before the last cut implicitly have 1 RDMA.
2849          *
2850          * Since the number of RDMAs is not known beforehand,
2851          * it must be filled-in retroactively - after each
2852          * segmentation cut or at the end of the entire packet.
2853          */
2854
2855         while (1) {
2856                 /* Break the SKB or Fragment up into pieces which
2857                  * do not cross mgp->tx_boundary */
2858                 low = MYRI10GE_LOWPART_TO_U32(bus);
2859                 high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
2860                 while (len) {
2861                         u8 flags_next;
2862                         int cum_len_next;
2863
2864                         if (unlikely(count == max_segments))
2865                                 goto abort_linearize;
2866
2867                         boundary =
2868                             (low + mgp->tx_boundary) & ~(mgp->tx_boundary - 1);
2869                         seglen = boundary - low;
2870                         if (seglen > len)
2871                                 seglen = len;
2872                         flags_next = flags & ~MXGEFW_FLAGS_FIRST;
2873                         cum_len_next = cum_len + seglen;
2874                         if (mss) {      /* TSO */
2875                                 (req - rdma_count)->rdma_count = rdma_count + 1;
2876
2877                                 if (likely(cum_len >= 0)) {     /* payload */
2878                                         int next_is_first, chop;
2879
2880                                         chop = (cum_len_next > mss);
2881                                         cum_len_next = cum_len_next % mss;
2882                                         next_is_first = (cum_len_next == 0);
2883                                         flags |= chop * MXGEFW_FLAGS_TSO_CHOP;
2884                                         flags_next |= next_is_first *
2885                                             MXGEFW_FLAGS_FIRST;
2886                                         rdma_count |= -(chop | next_is_first);
2887                                         rdma_count += chop & !next_is_first;
2888                                 } else if (likely(cum_len_next >= 0)) { /* header ends */
2889                                         int small;
2890
2891                                         rdma_count = -1;
2892                                         cum_len_next = 0;
2893                                         seglen = -cum_len;
2894                                         small = (mss <= MXGEFW_SEND_SMALL_SIZE);
2895                                         flags_next = MXGEFW_FLAGS_TSO_PLD |
2896                                             MXGEFW_FLAGS_FIRST |
2897                                             (small * MXGEFW_FLAGS_SMALL);
2898                                 }
2899                         }
2900                         req->addr_high = high_swapped;
2901                         req->addr_low = htonl(low);
2902                         req->pseudo_hdr_offset = htons(pseudo_hdr_offset);
2903                         req->pad = 0;   /* complete solid 16-byte block; does this matter? */
2904                         req->rdma_count = 1;
2905                         req->length = htons(seglen);
2906                         req->cksum_offset = cksum_offset;
2907                         req->flags = flags | ((cum_len & 1) * odd_flag);
2908
2909                         low += seglen;
2910                         len -= seglen;
2911                         cum_len = cum_len_next;
2912                         flags = flags_next;
2913                         req++;
2914                         count++;
2915                         rdma_count++;
2916                         if (cksum_offset != 0 && !(mss && skb_is_gso_v6(skb))) {
2917                                 if (unlikely(cksum_offset > seglen))
2918                                         cksum_offset -= seglen;
2919                                 else
2920                                         cksum_offset = 0;
2921                         }
2922                 }
2923                 if (frag_idx == frag_cnt)
2924                         break;
2925
2926                 /* map next fragment for DMA */
2927                 idx = (count + tx->req) & tx->mask;
2928                 frag = &skb_shinfo(skb)->frags[frag_idx];
2929                 frag_idx++;
2930                 len = skb_frag_size(frag);
2931                 bus = skb_frag_dma_map(&mgp->pdev->dev, frag, 0, len,
2932                                        DMA_TO_DEVICE);
2933                 dma_unmap_addr_set(&tx->info[idx], bus, bus);
2934                 dma_unmap_len_set(&tx->info[idx], len, len);
2935         }
2936
2937         (req - rdma_count)->rdma_count = rdma_count;
2938         if (mss)
2939                 do {
2940                         req--;
2941                         req->flags |= MXGEFW_FLAGS_TSO_LAST;
2942                 } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP |
2943                                          MXGEFW_FLAGS_FIRST)));
2944         idx = ((count - 1) + tx->req) & tx->mask;
2945         tx->info[idx].last = 1;
2946         myri10ge_submit_req(tx, tx->req_list, count);
2947         /* if using multiple tx queues, make sure NIC polls the
2948          * current slice */
2949         if ((mgp->dev->real_num_tx_queues > 1) && tx->queue_active == 0) {
2950                 tx->queue_active = 1;
2951                 put_be32(htonl(1), tx->send_go);
2952                 mb();
2953                 mmiowb();
2954         }
2955         tx->pkt_start++;
2956         if ((avail - count) < MXGEFW_MAX_SEND_DESC) {
2957                 tx->stop_queue++;
2958                 netif_tx_stop_queue(netdev_queue);
2959         }
2960         return NETDEV_TX_OK;
2961
2962 abort_linearize:
2963         /* Free any DMA resources we've alloced and clear out the skb
2964          * slot so as to not trip up assertions, and to avoid a
2965          * double-free if linearizing fails */
2966
2967         last_idx = (idx + 1) & tx->mask;
2968         idx = tx->req & tx->mask;
2969         tx->info[idx].skb = NULL;
2970         do {
2971                 len = dma_unmap_len(&tx->info[idx], len);
2972                 if (len) {
2973                         if (tx->info[idx].skb != NULL)
2974                                 pci_unmap_single(mgp->pdev,
2975                                                  dma_unmap_addr(&tx->info[idx],
2976                                                                 bus), len,
2977                                                  PCI_DMA_TODEVICE);
2978                         else
2979                                 pci_unmap_page(mgp->pdev,
2980                                                dma_unmap_addr(&tx->info[idx],
2981                                                               bus), len,
2982                                                PCI_DMA_TODEVICE);
2983                         dma_unmap_len_set(&tx->info[idx], len, 0);
2984                         tx->info[idx].skb = NULL;
2985                 }
2986                 idx = (idx + 1) & tx->mask;
2987         } while (idx != last_idx);
2988         if (skb_is_gso(skb)) {
2989                 netdev_err(mgp->dev, "TSO but wanted to linearize?!?!?\n");
2990                 goto drop;
2991         }
2992
2993         if (skb_linearize(skb))
2994                 goto drop;
2995
2996         tx->linearized++;
2997         goto again;
2998
2999 drop:
3000         dev_kfree_skb_any(skb);
3001         ss->stats.tx_dropped += 1;
3002         return NETDEV_TX_OK;
3003
3004 }
3005
3006 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb,
3007                                          struct net_device *dev)
3008 {
3009         struct sk_buff *segs, *curr;
3010         struct myri10ge_priv *mgp = netdev_priv(dev);
3011         struct myri10ge_slice_state *ss;
3012         netdev_tx_t status;
3013
3014         segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO6);
3015         if (IS_ERR(segs))
3016                 goto drop;
3017
3018         while (segs) {
3019                 curr = segs;
3020                 segs = segs->next;
3021                 curr->next = NULL;
3022                 status = myri10ge_xmit(curr, dev);
3023                 if (status != 0) {
3024                         dev_kfree_skb_any(curr);
3025                         if (segs != NULL) {
3026                                 curr = segs;
3027                                 segs = segs->next;
3028                                 curr->next = NULL;
3029                                 dev_kfree_skb_any(segs);
3030                         }
3031                         goto drop;
3032                 }
3033         }
3034         dev_kfree_skb_any(skb);
3035         return NETDEV_TX_OK;
3036
3037 drop:
3038         ss = &mgp->ss[skb_get_queue_mapping(skb)];
3039         dev_kfree_skb_any(skb);
3040         ss->stats.tx_dropped += 1;
3041         return NETDEV_TX_OK;
3042 }
3043
3044 static struct rtnl_link_stats64 *myri10ge_get_stats(struct net_device *dev,
3045                                                     struct rtnl_link_stats64 *stats)
3046 {
3047         const struct myri10ge_priv *mgp = netdev_priv(dev);
3048         const struct myri10ge_slice_netstats *slice_stats;
3049         int i;
3050
3051         for (i = 0; i < mgp->num_slices; i++) {
3052                 slice_stats = &mgp->ss[i].stats;
3053                 stats->rx_packets += slice_stats->rx_packets;
3054                 stats->tx_packets += slice_stats->tx_packets;
3055                 stats->rx_bytes += slice_stats->rx_bytes;
3056                 stats->tx_bytes += slice_stats->tx_bytes;
3057                 stats->rx_dropped += slice_stats->rx_dropped;
3058                 stats->tx_dropped += slice_stats->tx_dropped;
3059         }
3060         return stats;
3061 }
3062
3063 static void myri10ge_set_multicast_list(struct net_device *dev)
3064 {
3065         struct myri10ge_priv *mgp = netdev_priv(dev);
3066         struct myri10ge_cmd cmd;
3067         struct netdev_hw_addr *ha;
3068         __be32 data[2] = { 0, 0 };
3069         int err;
3070
3071         /* can be called from atomic contexts,
3072          * pass 1 to force atomicity in myri10ge_send_cmd() */
3073         myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1);
3074
3075         /* This firmware is known to not support multicast */
3076         if (!mgp->fw_multicast_support)
3077                 return;
3078
3079         /* Disable multicast filtering */
3080
3081         err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1);
3082         if (err != 0) {
3083                 netdev_err(dev, "Failed MXGEFW_ENABLE_ALLMULTI, error status: %d\n",
3084                            err);
3085                 goto abort;
3086         }
3087
3088         if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) {
3089                 /* request to disable multicast filtering, so quit here */
3090                 return;
3091         }
3092
3093         /* Flush the filters */
3094
3095         err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS,
3096                                 &cmd, 1);
3097         if (err != 0) {
3098                 netdev_err(dev, "Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS, error status: %d\n",
3099                            err);
3100                 goto abort;
3101         }
3102
3103         /* Walk the multicast list, and add each address */
3104         netdev_for_each_mc_addr(ha, dev) {
3105                 memcpy(data, &ha->addr, 6);
3106                 cmd.data0 = ntohl(data[0]);
3107                 cmd.data1 = ntohl(data[1]);
3108                 err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP,
3109                                         &cmd, 1);
3110
3111                 if (err != 0) {
3112                         netdev_err(dev, "Failed MXGEFW_JOIN_MULTICAST_GROUP, error status:%d %pM\n",
3113                                    err, ha->addr);
3114                         goto abort;
3115                 }
3116         }
3117         /* Enable multicast filtering */
3118         err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1);
3119         if (err != 0) {
3120                 netdev_err(dev, "Failed MXGEFW_DISABLE_ALLMULTI, error status: %d\n",
3121                            err);
3122                 goto abort;
3123         }
3124
3125         return;
3126
3127 abort:
3128         return;
3129 }
3130
3131 static int myri10ge_set_mac_address(struct net_device *dev, void *addr)
3132 {
3133         struct sockaddr *sa = addr;
3134         struct myri10ge_priv *mgp = netdev_priv(dev);
3135         int status;
3136
3137         if (!is_valid_ether_addr(sa->sa_data))
3138                 return -EADDRNOTAVAIL;
3139
3140         status = myri10ge_update_mac_address(mgp, sa->sa_data);
3141         if (status != 0) {
3142                 netdev_err(dev, "changing mac address failed with %d\n",
3143                            status);
3144                 return status;
3145         }
3146
3147         /* change the dev structure */
3148         memcpy(dev->dev_addr, sa->sa_data, 6);
3149         return 0;
3150 }
3151
3152 static u32 myri10ge_fix_features(struct net_device *dev, u32 features)
3153 {
3154         if (!(features & NETIF_F_RXCSUM))
3155                 features &= ~NETIF_F_LRO;
3156
3157         return features;
3158 }
3159
3160 static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
3161 {
3162         struct myri10ge_priv *mgp = netdev_priv(dev);
3163         int error = 0;
3164
3165         if ((new_mtu < 68) || (ETH_HLEN + new_mtu > MYRI10GE_MAX_ETHER_MTU)) {
3166                 netdev_err(dev, "new mtu (%d) is not valid\n", new_mtu);
3167                 return -EINVAL;
3168         }
3169         netdev_info(dev, "changing mtu from %d to %d\n", dev->mtu, new_mtu);
3170         if (mgp->running) {
3171                 /* if we change the mtu on an active device, we must
3172                  * reset the device so the firmware sees the change */
3173                 myri10ge_close(dev);
3174                 dev->mtu = new_mtu;
3175                 myri10ge_open(dev);
3176         } else
3177                 dev->mtu = new_mtu;
3178
3179         return error;
3180 }
3181
3182 /*
3183  * Enable ECRC to align PCI-E Completion packets on an 8-byte boundary.
3184  * Only do it if the bridge is a root port since we don't want to disturb
3185  * any other device, except if forced with myri10ge_ecrc_enable > 1.
3186  */
3187
3188 static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
3189 {
3190         struct pci_dev *bridge = mgp->pdev->bus->self;
3191         struct device *dev = &mgp->pdev->dev;
3192         int cap;
3193         unsigned err_cap;
3194         u16 val;
3195         u8 ext_type;
3196         int ret;
3197
3198         if (!myri10ge_ecrc_enable || !bridge)
3199                 return;
3200
3201         /* check that the bridge is a root port */
3202         cap = pci_pcie_cap(bridge);
3203         pci_read_config_word(bridge, cap + PCI_CAP_FLAGS, &val);
3204         ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
3205         if (ext_type != PCI_EXP_TYPE_ROOT_PORT) {
3206                 if (myri10ge_ecrc_enable > 1) {
3207                         struct pci_dev *prev_bridge, *old_bridge = bridge;
3208
3209                         /* Walk the hierarchy up to the root port
3210                          * where ECRC has to be enabled */
3211                         do {
3212                                 prev_bridge = bridge;
3213                                 bridge = bridge->bus->self;
3214                                 if (!bridge || prev_bridge == bridge) {
3215                                         dev_err(dev,
3216                                                 "Failed to find root port"
3217                                                 " to force ECRC\n");
3218                                         return;
3219                                 }
3220                                 cap = pci_pcie_cap(bridge);
3221                                 pci_read_config_word(bridge,
3222                                                      cap + PCI_CAP_FLAGS, &val);
3223                                 ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
3224                         } while (ext_type != PCI_EXP_TYPE_ROOT_PORT);
3225
3226                         dev_info(dev,
3227                                  "Forcing ECRC on non-root port %s"
3228                                  " (enabling on root port %s)\n",
3229                                  pci_name(old_bridge), pci_name(bridge));
3230                 } else {
3231                         dev_err(dev,
3232                                 "Not enabling ECRC on non-root port %s\n",
3233                                 pci_name(bridge));
3234                         return;
3235                 }
3236         }
3237
3238         cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
3239         if (!cap)
3240                 return;
3241
3242         ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap);
3243         if (ret) {
3244                 dev_err(dev, "failed reading ext-conf-space of %s\n",
3245                         pci_name(bridge));
3246                 dev_err(dev, "\t pci=nommconf in use? "
3247                         "or buggy/incomplete/absent ACPI MCFG attr?\n");
3248                 return;
3249         }
3250         if (!(err_cap & PCI_ERR_CAP_ECRC_GENC))
3251                 return;
3252
3253         err_cap |= PCI_ERR_CAP_ECRC_GENE;
3254         pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap);
3255         dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge));
3256 }
3257
3258 /*
3259  * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput
3260  * when the PCI-E Completion packets are aligned on an 8-byte
3261  * boundary.  Some PCI-E chip sets always align Completion packets; on
3262  * the ones that do not, the alignment can be enforced by enabling
3263  * ECRC generation (if supported).
3264  *
3265  * When PCI-E Completion packets are not aligned, it is actually more
3266  * efficient to limit Read-DMA transactions to 2KB, rather than 4KB.
3267  *
3268  * If the driver can neither enable ECRC nor verify that it has
3269  * already been enabled, then it must use a firmware image which works
3270  * around unaligned completion packets (myri10ge_rss_ethp_z8e.dat), and it
3271  * should also ensure that it never gives the device a Read-DMA which is
3272  * larger than 2KB by setting the tx_boundary to 2KB.  If ECRC is
3273  * enabled, then the driver should use the aligned (myri10ge_rss_eth_z8e.dat)
3274  * firmware image, and set tx_boundary to 4KB.
3275  */
3276
3277 static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
3278 {
3279         struct pci_dev *pdev = mgp->pdev;
3280         struct device *dev = &pdev->dev;
3281         int status;
3282
3283         mgp->tx_boundary = 4096;
3284         /*
3285          * Verify the max read request size was set to 4KB
3286          * before trying the test with 4KB.
3287          */
3288         status = pcie_get_readrq(pdev);
3289         if (status < 0) {
3290                 dev_err(dev, "Couldn't read max read req size: %d\n", status);
3291                 goto abort;
3292         }
3293         if (status != 4096) {
3294                 dev_warn(dev, "Max Read Request size != 4096 (%d)\n", status);
3295                 mgp->tx_boundary = 2048;
3296         }
3297         /*
3298          * load the optimized firmware (which assumes aligned PCIe
3299          * completions) in order to see if it works on this host.
3300          */
3301         set_fw_name(mgp, myri10ge_fw_aligned, false);
3302         status = myri10ge_load_firmware(mgp, 1);
3303         if (status != 0) {
3304                 goto abort;
3305         }
3306
3307         /*
3308          * Enable ECRC if possible
3309          */
3310         myri10ge_enable_ecrc(mgp);
3311
3312         /*
3313          * Run a DMA test which watches for unaligned completions and
3314          * aborts on the first one seen.
3315          */
3316
3317         status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST);
3318         if (status == 0)
3319                 return;         /* keep the aligned firmware */
3320
3321         if (status != -E2BIG)
3322                 dev_warn(dev, "DMA test failed: %d\n", status);
3323         if (status == -ENOSYS)
3324                 dev_warn(dev, "Falling back to ethp! "
3325                          "Please install up to date fw\n");
3326 abort:
3327         /* fall back to using the unaligned firmware */
3328         mgp->tx_boundary = 2048;
3329         set_fw_name(mgp, myri10ge_fw_unaligned, false);
3330 }
3331
3332 static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
3333 {
3334         int overridden = 0;
3335
3336         if (myri10ge_force_firmware == 0) {
3337                 int link_width, exp_cap;
3338                 u16 lnk;
3339
3340                 exp_cap = pci_pcie_cap(mgp->pdev);
3341                 pci_read_config_word(mgp->pdev, exp_cap + PCI_EXP_LNKSTA, &lnk);
3342                 link_width = (lnk >> 4) & 0x3f;
3343
3344                 /* Check to see if Link is less than 8 or if the
3345                  * upstream bridge is known to provide aligned
3346                  * completions */
3347                 if (link_width < 8) {
3348                         dev_info(&mgp->pdev->dev, "PCIE x%d Link\n",
3349                                  link_width);
3350                         mgp->tx_boundary = 4096;
3351                         set_fw_name(mgp, myri10ge_fw_aligned, false);
3352                 } else {
3353                         myri10ge_firmware_probe(mgp);
3354                 }
3355         } else {
3356                 if (myri10ge_force_firmware == 1) {
3357                         dev_info(&mgp->pdev->dev,
3358                                  "Assuming aligned completions (forced)\n");
3359                         mgp->tx_boundary = 4096;
3360                         set_fw_name(mgp, myri10ge_fw_aligned, false);
3361                 } else {
3362                         dev_info(&mgp->pdev->dev,
3363                                  "Assuming unaligned completions (forced)\n");
3364                         mgp->tx_boundary = 2048;
3365                         set_fw_name(mgp, myri10ge_fw_unaligned, false);
3366                 }
3367         }
3368
3369         kparam_block_sysfs_write(myri10ge_fw_name);
3370         if (myri10ge_fw_name != NULL) {
3371                 char *fw_name = kstrdup(myri10ge_fw_name, GFP_KERNEL);
3372                 if (fw_name) {
3373                         overridden = 1;
3374                         set_fw_name(mgp, fw_name, true);
3375                 }
3376         }
3377         kparam_unblock_sysfs_write(myri10ge_fw_name);
3378
3379         if (mgp->board_number < MYRI10GE_MAX_BOARDS &&
3380             myri10ge_fw_names[mgp->board_number] != NULL &&
3381             strlen(myri10ge_fw_names[mgp->board_number])) {
3382                 set_fw_name(mgp, myri10ge_fw_names[mgp->board_number], false);
3383                 overridden = 1;
3384         }
3385         if (overridden)
3386                 dev_info(&mgp->pdev->dev, "overriding firmware to %s\n",
3387                          mgp->fw_name);
3388 }
3389
3390 static void myri10ge_mask_surprise_down(struct pci_dev *pdev)
3391 {
3392         struct pci_dev *bridge = pdev->bus->self;
3393         int cap;
3394         u32 mask;
3395
3396         if (bridge == NULL)
3397                 return;
3398
3399         cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
3400         if (cap) {
3401                 /* a sram parity error can cause a surprise link
3402                  * down; since we expect and can recover from sram
3403                  * parity errors, mask surprise link down events */
3404                 pci_read_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, &mask);
3405                 mask |= 0x20;
3406                 pci_write_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, mask);
3407         }
3408 }
3409
3410 #ifdef CONFIG_PM
3411 static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state)
3412 {
3413         struct myri10ge_priv *mgp;
3414         struct net_device *netdev;
3415
3416         mgp = pci_get_drvdata(pdev);
3417         if (mgp == NULL)
3418                 return -EINVAL;
3419         netdev = mgp->dev;
3420
3421         netif_device_detach(netdev);
3422         if (netif_running(netdev)) {
3423                 netdev_info(netdev, "closing\n");
3424                 rtnl_lock();
3425                 myri10ge_close(netdev);
3426                 rtnl_unlock();
3427         }
3428         myri10ge_dummy_rdma(mgp, 0);
3429         pci_save_state(pdev);
3430         pci_disable_device(pdev);
3431
3432         return pci_set_power_state(pdev, pci_choose_state(pdev, state));
3433 }
3434
3435 static int myri10ge_resume(struct pci_dev *pdev)
3436 {
3437         struct myri10ge_priv *mgp;
3438         struct net_device *netdev;
3439         int status;
3440         u16 vendor;
3441
3442         mgp = pci_get_drvdata(pdev);
3443         if (mgp == NULL)
3444                 return -EINVAL;
3445         netdev = mgp->dev;
3446         pci_set_power_state(pdev, 0);   /* zeros conf space as a side effect */
3447         msleep(5);              /* give card time to respond */
3448         pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3449         if (vendor == 0xffff) {
3450                 netdev_err(mgp->dev, "device disappeared!\n");
3451                 return -EIO;
3452         }
3453
3454         pci_restore_state(pdev);
3455
3456         status = pci_enable_device(pdev);
3457         if (status) {
3458                 dev_err(&pdev->dev, "failed to enable device\n");
3459                 return status;
3460         }
3461
3462         pci_set_master(pdev);
3463
3464         myri10ge_reset(mgp);
3465         myri10ge_dummy_rdma(mgp, 1);
3466
3467         /* Save configuration space to be restored if the
3468          * nic resets due to a parity error */
3469         pci_save_state(pdev);
3470
3471         if (netif_running(netdev)) {
3472                 rtnl_lock();
3473                 status = myri10ge_open(netdev);
3474                 rtnl_unlock();
3475                 if (status != 0)
3476                         goto abort_with_enabled;
3477
3478         }
3479         netif_device_attach(netdev);
3480
3481         return 0;
3482
3483 abort_with_enabled:
3484         pci_disable_device(pdev);
3485         return -EIO;
3486
3487 }
3488 #endif                          /* CONFIG_PM */
3489
3490 static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp)
3491 {
3492         struct pci_dev *pdev = mgp->pdev;
3493         int vs = mgp->vendor_specific_offset;
3494         u32 reboot;
3495
3496         /*enter read32 mode */
3497         pci_write_config_byte(pdev, vs + 0x10, 0x3);
3498
3499         /*read REBOOT_STATUS (0xfffffff0) */
3500         pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0);
3501         pci_read_config_dword(pdev, vs + 0x14, &reboot);
3502         return reboot;
3503 }
3504
3505 static void
3506 myri10ge_check_slice(struct myri10ge_slice_state *ss, int *reset_needed,
3507                      int *busy_slice_cnt, u32 rx_pause_cnt)
3508 {
3509         struct myri10ge_priv *mgp = ss->mgp;
3510         int slice = ss - mgp->ss;
3511
3512         if (ss->tx.req != ss->tx.done &&
3513             ss->tx.done == ss->watchdog_tx_done &&
3514             ss->watchdog_tx_req != ss->watchdog_tx_done) {
3515                 /* nic seems like it might be stuck.. */
3516                 if (rx_pause_cnt != mgp->watchdog_pause) {
3517                         if (net_ratelimit())
3518                                 netdev_warn(mgp->dev, "slice %d: TX paused, "
3519                                             "check link partner\n", slice);
3520                 } else {
3521                         netdev_warn(mgp->dev,
3522                                     "slice %d: TX stuck %d %d %d %d %d %d\n",
3523                                     slice, ss->tx.queue_active, ss->tx.req,
3524                                     ss->tx.done, ss->tx.pkt_start,
3525                                     ss->tx.pkt_done,
3526                                     (int)ntohl(mgp->ss[slice].fw_stats->
3527                                                send_done_count));
3528                         *reset_needed = 1;
3529                         ss->stuck = 1;
3530                 }
3531         }
3532         if (ss->watchdog_tx_done != ss->tx.done ||
3533             ss->watchdog_rx_done != ss->rx_done.cnt) {
3534                 *busy_slice_cnt += 1;
3535         }
3536         ss->watchdog_tx_done = ss->tx.done;
3537         ss->watchdog_tx_req = ss->tx.req;
3538         ss->watchdog_rx_done = ss->rx_done.cnt;
3539 }
3540
3541 /*
3542  * This watchdog is used to check whether the board has suffered
3543  * from a parity error and needs to be recovered.
3544  */
3545 static void myri10ge_watchdog(struct work_struct *work)
3546 {
3547         struct myri10ge_priv *mgp =
3548             container_of(work, struct myri10ge_priv, watchdog_work);
3549         struct myri10ge_slice_state *ss;
3550         u32 reboot, rx_pause_cnt;
3551         int status, rebooted;
3552         int i;
3553         int reset_needed = 0;
3554         int busy_slice_cnt = 0;
3555         u16 cmd, vendor;
3556
3557         mgp->watchdog_resets++;
3558         pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3559         rebooted = 0;
3560         if ((cmd & PCI_COMMAND_MASTER) == 0) {
3561                 /* Bus master DMA disabled?  Check to see
3562                  * if the card rebooted due to a parity error
3563                  * For now, just report it */
3564                 reboot = myri10ge_read_reboot(mgp);
3565                 netdev_err(mgp->dev, "NIC rebooted (0x%x),%s resetting\n",
3566                            reboot, myri10ge_reset_recover ? "" : " not");
3567                 if (myri10ge_reset_recover == 0)
3568                         return;
3569                 rtnl_lock();
3570                 mgp->rebooted = 1;
3571                 rebooted = 1;
3572                 myri10ge_close(mgp->dev);
3573                 myri10ge_reset_recover--;
3574                 mgp->rebooted = 0;
3575                 /*
3576                  * A rebooted nic will come back with config space as
3577                  * it was after power was applied to PCIe bus.
3578                  * Attempt to restore config space which was saved
3579                  * when the driver was loaded, or the last time the
3580                  * nic was resumed from power saving mode.
3581                  */
3582                 pci_restore_state(mgp->pdev);
3583
3584                 /* save state again for accounting reasons */
3585                 pci_save_state(mgp->pdev);
3586
3587         } else {
3588                 /* if we get back -1's from our slot, perhaps somebody
3589                  * powered off our card.  Don't try to reset it in
3590                  * this case */
3591                 if (cmd == 0xffff) {
3592                         pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3593                         if (vendor == 0xffff) {
3594                                 netdev_err(mgp->dev, "device disappeared!\n");
3595                                 return;
3596                         }
3597                 }
3598                 /* Perhaps it is a software error. See if stuck slice
3599                  * has recovered, reset if not */
3600                 rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3601                 for (i = 0; i < mgp->num_slices; i++) {
3602                         ss = mgp->ss;
3603                         if (ss->stuck) {
3604                                 myri10ge_check_slice(ss, &reset_needed,
3605                                                      &busy_slice_cnt,
3606                                                      rx_pause_cnt);
3607                                 ss->stuck = 0;
3608                         }
3609                 }
3610                 if (!reset_needed) {
3611                         netdev_dbg(mgp->dev, "not resetting\n");
3612                         return;
3613                 }
3614
3615                 netdev_err(mgp->dev, "device timeout, resetting\n");
3616         }
3617
3618         if (!rebooted) {
3619                 rtnl_lock();
3620                 myri10ge_close(mgp->dev);
3621         }
3622         status = myri10ge_load_firmware(mgp, 1);
3623         if (status != 0)
3624                 netdev_err(mgp->dev, "failed to load firmware\n");
3625         else
3626                 myri10ge_open(mgp->dev);
3627         rtnl_unlock();
3628 }
3629
3630 /*
3631  * We use our own timer routine rather than relying upon
3632  * netdev->tx_timeout because we have a very large hardware transmit
3633  * queue.  Due to the large queue, the netdev->tx_timeout function
3634  * cannot detect a NIC with a parity error in a timely fashion if the
3635  * NIC is lightly loaded.
3636  */
3637 static void myri10ge_watchdog_timer(unsigned long arg)
3638 {
3639         struct myri10ge_priv *mgp;
3640         struct myri10ge_slice_state *ss;
3641         int i, reset_needed, busy_slice_cnt;
3642         u32 rx_pause_cnt;
3643         u16 cmd;
3644
3645         mgp = (struct myri10ge_priv *)arg;
3646
3647         rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3648         busy_slice_cnt = 0;
3649         for (i = 0, reset_needed = 0;
3650              i < mgp->num_slices && reset_needed == 0; ++i) {
3651
3652                 ss = &mgp->ss[i];
3653                 if (ss->rx_small.watchdog_needed) {
3654                         myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
3655                                                 mgp->small_bytes + MXGEFW_PAD,
3656                                                 1);
3657                         if (ss->rx_small.fill_cnt - ss->rx_small.cnt >=
3658                             myri10ge_fill_thresh)
3659                                 ss->rx_small.watchdog_needed = 0;
3660                 }
3661                 if (ss->rx_big.watchdog_needed) {
3662                         myri10ge_alloc_rx_pages(mgp, &ss->rx_big,
3663                                                 mgp->big_bytes, 1);
3664                         if (ss->rx_big.fill_cnt - ss->rx_big.cnt >=
3665                             myri10ge_fill_thresh)
3666                                 ss->rx_big.watchdog_needed = 0;
3667                 }
3668                 myri10ge_check_slice(ss, &reset_needed, &busy_slice_cnt,
3669                                      rx_pause_cnt);
3670         }
3671         /* if we've sent or received no traffic, poll the NIC to
3672          * ensure it is still there.  Otherwise, we risk not noticing
3673          * an error in a timely fashion */
3674         if (busy_slice_cnt == 0) {
3675                 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3676                 if ((cmd & PCI_COMMAND_MASTER) == 0) {
3677                         reset_needed = 1;
3678                 }
3679         }
3680         mgp->watchdog_pause = rx_pause_cnt;
3681
3682         if (reset_needed) {
3683                 schedule_work(&mgp->watchdog_work);
3684         } else {
3685                 /* rearm timer */
3686                 mod_timer(&mgp->watchdog_timer,
3687                           jiffies + myri10ge_watchdog_timeout * HZ);
3688         }
3689 }
3690
3691 static void myri10ge_free_slices(struct myri10ge_priv *mgp)
3692 {
3693         struct myri10ge_slice_state *ss;
3694         struct pci_dev *pdev = mgp->pdev;
3695         size_t bytes;
3696         int i;
3697
3698         if (mgp->ss == NULL)
3699                 return;
3700
3701         for (i = 0; i < mgp->num_slices; i++) {
3702                 ss = &mgp->ss[i];
3703                 if (ss->rx_done.entry != NULL) {
3704                         bytes = mgp->max_intr_slots *
3705                             sizeof(*ss->rx_done.entry);
3706                         dma_free_coherent(&pdev->dev, bytes,
3707                                           ss->rx_done.entry, ss->rx_done.bus);
3708                         ss->rx_done.entry = NULL;
3709                 }
3710                 if (ss->fw_stats != NULL) {
3711                         bytes = sizeof(*ss->fw_stats);
3712                         dma_free_coherent(&pdev->dev, bytes,
3713                                           ss->fw_stats, ss->fw_stats_bus);
3714                         ss->fw_stats = NULL;
3715                 }
3716                 netif_napi_del(&ss->napi);
3717         }
3718         kfree(mgp->ss);
3719         mgp->ss = NULL;
3720 }
3721
3722 static int myri10ge_alloc_slices(struct myri10ge_priv *mgp)
3723 {
3724         struct myri10ge_slice_state *ss;
3725         struct pci_dev *pdev = mgp->pdev;
3726         size_t bytes;
3727         int i;
3728
3729         bytes = sizeof(*mgp->ss) * mgp->num_slices;
3730         mgp->ss = kzalloc(bytes, GFP_KERNEL);
3731         if (mgp->ss == NULL) {
3732                 return -ENOMEM;
3733         }
3734
3735         for (i = 0; i < mgp->num_slices; i++) {
3736                 ss = &mgp->ss[i];
3737                 bytes = mgp->max_intr_slots * sizeof(*ss->rx_done.entry);
3738                 ss->rx_done.entry = dma_alloc_coherent(&pdev->dev, bytes,
3739                                                        &ss->rx_done.bus,
3740                                                        GFP_KERNEL);
3741                 if (ss->rx_done.entry == NULL)
3742                         goto abort;
3743                 memset(ss->rx_done.entry, 0, bytes);
3744                 bytes = sizeof(*ss->fw_stats);
3745                 ss->fw_stats = dma_alloc_coherent(&pdev->dev, bytes,
3746                                                   &ss->fw_stats_bus,
3747                                                   GFP_KERNEL);
3748                 if (ss->fw_stats == NULL)
3749                         goto abort;
3750                 ss->mgp = mgp;
3751                 ss->dev = mgp->dev;
3752                 netif_napi_add(ss->dev, &ss->napi, myri10ge_poll,
3753                                myri10ge_napi_weight);
3754         }
3755         return 0;
3756 abort:
3757         myri10ge_free_slices(mgp);
3758         return -ENOMEM;
3759 }
3760
3761 /*
3762  * This function determines the number of slices supported.
3763  * The number slices is the minimum of the number of CPUS,
3764  * the number of MSI-X irqs supported, the number of slices
3765  * supported by the firmware
3766  */
3767 static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
3768 {
3769         struct myri10ge_cmd cmd;
3770         struct pci_dev *pdev = mgp->pdev;
3771         char *old_fw;
3772         bool old_allocated;
3773         int i, status, ncpus, msix_cap;
3774
3775         mgp->num_slices = 1;
3776         msix_cap = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3777         ncpus = num_online_cpus();
3778
3779         if (myri10ge_max_slices == 1 || msix_cap == 0 ||
3780             (myri10ge_max_slices == -1 && ncpus < 2))
3781                 return;
3782
3783         /* try to load the slice aware rss firmware */
3784         old_fw = mgp->fw_name;
3785         old_allocated = mgp->fw_name_allocated;
3786         /* don't free old_fw if we override it. */
3787         mgp->fw_name_allocated = false;
3788
3789         if (myri10ge_fw_name != NULL) {
3790                 dev_info(&mgp->pdev->dev, "overriding rss firmware to %s\n",
3791                          myri10ge_fw_name);
3792                 set_fw_name(mgp, myri10ge_fw_name, false);
3793         } else if (old_fw == myri10ge_fw_aligned)
3794                 set_fw_name(mgp, myri10ge_fw_rss_aligned, false);
3795         else
3796                 set_fw_name(mgp, myri10ge_fw_rss_unaligned, false);
3797         status = myri10ge_load_firmware(mgp, 0);
3798         if (status != 0) {
3799                 dev_info(&pdev->dev, "Rss firmware not found\n");
3800                 if (old_allocated)
3801                         kfree(old_fw);
3802                 return;
3803         }
3804
3805         /* hit the board with a reset to ensure it is alive */
3806         memset(&cmd, 0, sizeof(cmd));
3807         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
3808         if (status != 0) {
3809                 dev_err(&mgp->pdev->dev, "failed reset\n");
3810                 goto abort_with_fw;
3811         }
3812
3813         mgp->max_intr_slots = cmd.data0 / sizeof(struct mcp_slot);
3814
3815         /* tell it the size of the interrupt queues */
3816         cmd.data0 = mgp->max_intr_slots * sizeof(struct mcp_slot);
3817         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
3818         if (status != 0) {
3819                 dev_err(&mgp->pdev->dev, "failed MXGEFW_CMD_SET_INTRQ_SIZE\n");
3820                 goto abort_with_fw;
3821         }
3822
3823         /* ask the maximum number of slices it supports */
3824         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES, &cmd, 0);
3825         if (status != 0)
3826                 goto abort_with_fw;
3827         else
3828                 mgp->num_slices = cmd.data0;
3829
3830         /* Only allow multiple slices if MSI-X is usable */
3831         if (!myri10ge_msi) {
3832                 goto abort_with_fw;
3833         }
3834
3835         /* if the admin did not specify a limit to how many
3836          * slices we should use, cap it automatically to the
3837          * number of CPUs currently online */
3838         if (myri10ge_max_slices == -1)
3839                 myri10ge_max_slices = ncpus;
3840
3841         if (mgp->num_slices > myri10ge_max_slices)
3842                 mgp->num_slices = myri10ge_max_slices;
3843
3844         /* Now try to allocate as many MSI-X vectors as we have
3845          * slices. We give up on MSI-X if we can only get a single
3846          * vector. */
3847
3848         mgp->msix_vectors = kcalloc(mgp->num_slices, sizeof(*mgp->msix_vectors),
3849                                     GFP_KERNEL);
3850         if (mgp->msix_vectors == NULL)
3851                 goto disable_msix;
3852         for (i = 0; i < mgp->num_slices; i++) {
3853                 mgp->msix_vectors[i].entry = i;
3854         }
3855
3856         while (mgp->num_slices > 1) {
3857                 /* make sure it is a power of two */
3858                 while (!is_power_of_2(mgp->num_slices))
3859                         mgp->num_slices--;
3860                 if (mgp->num_slices == 1)
3861                         goto disable_msix;
3862                 status = pci_enable_msix(pdev, mgp->msix_vectors,
3863                                          mgp->num_slices);
3864                 if (status == 0) {
3865                         pci_disable_msix(pdev);
3866                         if (old_allocated)
3867                                 kfree(old_fw);
3868                         return;
3869                 }
3870                 if (status > 0)
3871                         mgp->num_slices = status;
3872                 else
3873                         goto disable_msix;
3874         }
3875
3876 disable_msix:
3877         if (mgp->msix_vectors != NULL) {
3878                 kfree(mgp->msix_vectors);
3879                 mgp->msix_vectors = NULL;
3880         }
3881
3882 abort_with_fw:
3883         mgp->num_slices = 1;
3884         set_fw_name(mgp, old_fw, old_allocated);
3885         myri10ge_load_firmware(mgp, 0);
3886 }
3887
3888 static const struct net_device_ops myri10ge_netdev_ops = {
3889         .ndo_open               = myri10ge_open,
3890         .ndo_stop               = myri10ge_close,
3891         .ndo_start_xmit         = myri10ge_xmit,
3892         .ndo_get_stats64        = myri10ge_get_stats,
3893         .ndo_validate_addr      = eth_validate_addr,
3894         .ndo_change_mtu         = myri10ge_change_mtu,
3895         .ndo_fix_features       = myri10ge_fix_features,
3896         .ndo_set_rx_mode        = myri10ge_set_multicast_list,
3897         .ndo_set_mac_address    = myri10ge_set_mac_address,
3898 };
3899
3900 static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3901 {
3902         struct net_device *netdev;
3903         struct myri10ge_priv *mgp;
3904         struct device *dev = &pdev->dev;
3905         int i;
3906         int status = -ENXIO;
3907         int dac_enabled;
3908         unsigned hdr_offset, ss_offset;
3909         static int board_number;
3910
3911         netdev = alloc_etherdev_mq(sizeof(*mgp), MYRI10GE_MAX_SLICES);
3912         if (netdev == NULL) {
3913                 dev_err(dev, "Could not allocate ethernet device\n");
3914                 return -ENOMEM;
3915         }
3916
3917         SET_NETDEV_DEV(netdev, &pdev->dev);
3918
3919         mgp = netdev_priv(netdev);
3920         mgp->dev = netdev;
3921         mgp->pdev = pdev;
3922         mgp->pause = myri10ge_flow_control;
3923         mgp->intr_coal_delay = myri10ge_intr_coal_delay;
3924         mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT);
3925         mgp->board_number = board_number;
3926         init_waitqueue_head(&mgp->down_wq);
3927
3928         if (pci_enable_device(pdev)) {
3929                 dev_err(&pdev->dev, "pci_enable_device call failed\n");
3930                 status = -ENODEV;
3931                 goto abort_with_netdev;
3932         }
3933
3934         /* Find the vendor-specific cap so we can check
3935          * the reboot register later on */
3936         mgp->vendor_specific_offset
3937             = pci_find_capability(pdev, PCI_CAP_ID_VNDR);
3938
3939         /* Set our max read request to 4KB */
3940         status = pcie_set_readrq(pdev, 4096);
3941         if (status != 0) {
3942                 dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n",
3943                         status);
3944                 goto abort_with_enabled;
3945         }
3946
3947         myri10ge_mask_surprise_down(pdev);
3948         pci_set_master(pdev);
3949         dac_enabled = 1;
3950         status = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
3951         if (status != 0) {
3952                 dac_enabled = 0;
3953                 dev_err(&pdev->dev,
3954                         "64-bit pci address mask was refused, "
3955                         "trying 32-bit\n");
3956                 status = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3957         }
3958         if (status != 0) {
3959                 dev_err(&pdev->dev, "Error %d setting DMA mask\n", status);
3960                 goto abort_with_enabled;
3961         }
3962         (void)pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
3963         mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd),
3964                                       &mgp->cmd_bus, GFP_KERNEL);
3965         if (mgp->cmd == NULL)
3966                 goto abort_with_enabled;
3967
3968         mgp->board_span = pci_resource_len(pdev, 0);
3969         mgp->iomem_base = pci_resource_start(pdev, 0);
3970         mgp->mtrr = -1;
3971         mgp->wc_enabled = 0;
3972 #ifdef CONFIG_MTRR
3973         mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span,
3974                              MTRR_TYPE_WRCOMB, 1);
3975         if (mgp->mtrr >= 0)
3976                 mgp->wc_enabled = 1;
3977 #endif
3978         mgp->sram = ioremap_wc(mgp->iomem_base, mgp->board_span);
3979         if (mgp->sram == NULL) {
3980                 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n",
3981                         mgp->board_span, mgp->iomem_base);
3982                 status = -ENXIO;
3983                 goto abort_with_mtrr;
3984         }
3985         hdr_offset =
3986             ntohl(__raw_readl(mgp->sram + MCP_HEADER_PTR_OFFSET)) & 0xffffc;
3987         ss_offset = hdr_offset + offsetof(struct mcp_gen_header, string_specs);
3988         mgp->sram_size = ntohl(__raw_readl(mgp->sram + ss_offset));
3989         if (mgp->sram_size > mgp->board_span ||
3990             mgp->sram_size <= MYRI10GE_FW_OFFSET) {
3991                 dev_err(&pdev->dev,
3992                         "invalid sram_size %dB or board span %ldB\n",
3993                         mgp->sram_size, mgp->board_span);
3994                 goto abort_with_ioremap;
3995         }
3996         memcpy_fromio(mgp->eeprom_strings,
3997                       mgp->sram + mgp->sram_size, MYRI10GE_EEPROM_STRINGS_SIZE);
3998         memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2);
3999         status = myri10ge_read_mac_addr(mgp);
4000         if (status)
4001                 goto abort_with_ioremap;
4002
4003         for (i = 0; i < ETH_ALEN; i++)
4004                 netdev->dev_addr[i] = mgp->mac_addr[i];
4005
4006         myri10ge_select_firmware(mgp);
4007
4008         status = myri10ge_load_firmware(mgp, 1);
4009         if (status != 0) {
4010                 dev_err(&pdev->dev, "failed to load firmware\n");
4011                 goto abort_with_ioremap;
4012         }
4013         myri10ge_probe_slices(mgp);
4014         status = myri10ge_alloc_slices(mgp);
4015         if (status != 0) {
4016                 dev_err(&pdev->dev, "failed to alloc slice state\n");
4017                 goto abort_with_firmware;
4018         }
4019         netif_set_real_num_tx_queues(netdev, mgp->num_slices);
4020         netif_set_real_num_rx_queues(netdev, mgp->num_slices);
4021         status = myri10ge_reset(mgp);
4022         if (status != 0) {
4023                 dev_err(&pdev->dev, "failed reset\n");
4024                 goto abort_with_slices;
4025         }
4026 #ifdef CONFIG_MYRI10GE_DCA
4027         myri10ge_setup_dca(mgp);
4028 #endif
4029         pci_set_drvdata(pdev, mgp);
4030         if ((myri10ge_initial_mtu + ETH_HLEN) > MYRI10GE_MAX_ETHER_MTU)
4031                 myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
4032         if ((myri10ge_initial_mtu + ETH_HLEN) < 68)
4033                 myri10ge_initial_mtu = 68;
4034
4035         netdev->netdev_ops = &myri10ge_netdev_ops;
4036         netdev->mtu = myri10ge_initial_mtu;
4037         netdev->base_addr = mgp->iomem_base;
4038         netdev->hw_features = mgp->features | NETIF_F_LRO | NETIF_F_RXCSUM;
4039         netdev->features = netdev->hw_features;
4040
4041         if (dac_enabled)
4042                 netdev->features |= NETIF_F_HIGHDMA;
4043
4044         netdev->vlan_features |= mgp->features;
4045         if (mgp->fw_ver_tiny < 37)
4046                 netdev->vlan_features &= ~NETIF_F_TSO6;
4047         if (mgp->fw_ver_tiny < 32)
4048                 netdev->vlan_features &= ~NETIF_F_TSO;
4049
4050         /* make sure we can get an irq, and that MSI can be
4051          * setup (if available).  Also ensure netdev->irq
4052          * is set to correct value if MSI is enabled */
4053         status = myri10ge_request_irq(mgp);
4054         if (status != 0)
4055                 goto abort_with_firmware;
4056         netdev->irq = pdev->irq;
4057         myri10ge_free_irq(mgp);
4058
4059         /* Save configuration space to be restored if the
4060          * nic resets due to a parity error */
4061         pci_save_state(pdev);
4062
4063         /* Setup the watchdog timer */
4064         setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer,
4065                     (unsigned long)mgp);
4066
4067         SET_ETHTOOL_OPS(netdev, &myri10ge_ethtool_ops);
4068         INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog);
4069         status = register_netdev(netdev);
4070         if (status != 0) {
4071                 dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
4072                 goto abort_with_state;
4073         }
4074         if (mgp->msix_enabled)
4075                 dev_info(dev, "%d MSI-X IRQs, tx bndry %d, fw %s, WC %s\n",
4076                          mgp->num_slices, mgp->tx_boundary, mgp->fw_name,
4077                          (mgp->wc_enabled ? "Enabled" : "Disabled"));
4078         else
4079                 dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, WC %s\n",
4080                          mgp->msi_enabled ? "MSI" : "xPIC",
4081                          netdev->irq, mgp->tx_boundary, mgp->fw_name,
4082                          (mgp->wc_enabled ? "Enabled" : "Disabled"));
4083
4084         board_number++;
4085         return 0;
4086
4087 abort_with_state:
4088         pci_restore_state(pdev);
4089
4090 abort_with_slices:
4091         myri10ge_free_slices(mgp);
4092
4093 abort_with_firmware:
4094         myri10ge_dummy_rdma(mgp, 0);
4095
4096 abort_with_ioremap:
4097         if (mgp->mac_addr_string != NULL)
4098                 dev_err(&pdev->dev,
4099                         "myri10ge_probe() failed: MAC=%s, SN=%ld\n",
4100                         mgp->mac_addr_string, mgp->serial_number);
4101         iounmap(mgp->sram);
4102
4103 abort_with_mtrr:
4104 #ifdef CONFIG_MTRR
4105         if (mgp->mtrr >= 0)
4106                 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
4107 #endif
4108         dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
4109                           mgp->cmd, mgp->cmd_bus);
4110
4111 abort_with_enabled:
4112         pci_disable_device(pdev);
4113
4114 abort_with_netdev:
4115         set_fw_name(mgp, NULL, false);
4116         free_netdev(netdev);
4117         return status;
4118 }
4119
4120 /*
4121  * myri10ge_remove
4122  *
4123  * Does what is necessary to shutdown one Myrinet device. Called
4124  *   once for each Myrinet card by the kernel when a module is
4125  *   unloaded.
4126  */
4127 static void myri10ge_remove(struct pci_dev *pdev)
4128 {
4129         struct myri10ge_priv *mgp;
4130         struct net_device *netdev;
4131
4132         mgp = pci_get_drvdata(pdev);
4133         if (mgp == NULL)
4134                 return;
4135
4136         cancel_work_sync(&mgp->watchdog_work);
4137         netdev = mgp->dev;
4138         unregister_netdev(netdev);
4139
4140 #ifdef CONFIG_MYRI10GE_DCA
4141         myri10ge_teardown_dca(mgp);
4142 #endif
4143         myri10ge_dummy_rdma(mgp, 0);
4144
4145         /* avoid a memory leak */
4146         pci_restore_state(pdev);
4147
4148         iounmap(mgp->sram);
4149
4150 #ifdef CONFIG_MTRR
4151         if (mgp->mtrr >= 0)
4152                 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
4153 #endif
4154         myri10ge_free_slices(mgp);
4155         if (mgp->msix_vectors != NULL)
4156                 kfree(mgp->msix_vectors);
4157         dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
4158                           mgp->cmd, mgp->cmd_bus);
4159
4160         set_fw_name(mgp, NULL, false);
4161         free_netdev(netdev);
4162         pci_disable_device(pdev);
4163         pci_set_drvdata(pdev, NULL);
4164 }
4165
4166 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E      0x0008
4167 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9    0x0009
4168
4169 static DEFINE_PCI_DEVICE_TABLE(myri10ge_pci_tbl) = {
4170         {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)},
4171         {PCI_DEVICE
4172          (PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9)},
4173         {0},
4174 };
4175
4176 MODULE_DEVICE_TABLE(pci, myri10ge_pci_tbl);
4177
4178 static struct pci_driver myri10ge_driver = {
4179         .name = "myri10ge",
4180         .probe = myri10ge_probe,
4181         .remove = myri10ge_remove,
4182         .id_table = myri10ge_pci_tbl,
4183 #ifdef CONFIG_PM
4184         .suspend = myri10ge_suspend,
4185         .resume = myri10ge_resume,
4186 #endif
4187 };
4188
4189 #ifdef CONFIG_MYRI10GE_DCA
4190 static int
4191 myri10ge_notify_dca(struct notifier_block *nb, unsigned long event, void *p)
4192 {
4193         int err = driver_for_each_device(&myri10ge_driver.driver,
4194                                          NULL, &event,
4195                                          myri10ge_notify_dca_device);
4196
4197         if (err)
4198                 return NOTIFY_BAD;
4199         return NOTIFY_DONE;
4200 }
4201
4202 static struct notifier_block myri10ge_dca_notifier = {
4203         .notifier_call = myri10ge_notify_dca,
4204         .next = NULL,
4205         .priority = 0,
4206 };
4207 #endif                          /* CONFIG_MYRI10GE_DCA */
4208
4209 static __init int myri10ge_init_module(void)
4210 {
4211         pr_info("Version %s\n", MYRI10GE_VERSION_STR);
4212
4213         if (myri10ge_rss_hash > MXGEFW_RSS_HASH_TYPE_MAX) {
4214                 pr_err("Illegal rssh hash type %d, defaulting to source port\n",
4215                        myri10ge_rss_hash);
4216                 myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT;
4217         }
4218 #ifdef CONFIG_MYRI10GE_DCA
4219         dca_register_notify(&myri10ge_dca_notifier);
4220 #endif
4221         if (myri10ge_max_slices > MYRI10GE_MAX_SLICES)
4222                 myri10ge_max_slices = MYRI10GE_MAX_SLICES;
4223
4224         return pci_register_driver(&myri10ge_driver);
4225 }
4226
4227 module_init(myri10ge_init_module);
4228
4229 static __exit void myri10ge_cleanup_module(void)
4230 {
4231 #ifdef CONFIG_MYRI10GE_DCA
4232         dca_unregister_notify(&myri10ge_dca_notifier);
4233 #endif
4234         pci_unregister_driver(&myri10ge_driver);
4235 }
4236
4237 module_exit(myri10ge_cleanup_module);