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   1 /*************************************************************************
   2  * myri10ge.c: Myricom Myri-10G Ethernet driver.
   3  *
   4  * Copyright (C) 2005 - 2007 Myricom, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of Myricom, Inc. nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  20  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  23  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  *
  31  *
  32  * If the eeprom on your board is not recent enough, you will need to get a
  33  * newer firmware image at:
  34  *   http://www.myri.com/scs/download-Myri10GE.html
  35  *
  36  * Contact Information:
  37  *   <help@myri.com>
  38  *   Myricom, Inc., 325N Santa Anita Avenue, Arcadia, CA 91006
  39  *************************************************************************/
  40
  41 #include <linux/tcp.h>
  42 #include <linux/netdevice.h>
  43 #include <linux/skbuff.h>
  44 #include <linux/string.h>
  45 #include <linux/module.h>
  46 #include <linux/pci.h>
  47 #include <linux/dma-mapping.h>
  48 #include <linux/etherdevice.h>
  49 #include <linux/if_ether.h>
  50 #include <linux/if_vlan.h>
  51 #include <linux/inet_lro.h>
  52 #include <linux/dca.h>
  53 #include <linux/ip.h>
  54 #include <linux/inet.h>
  55 #include <linux/in.h>
  56 #include <linux/ethtool.h>
  57 #include <linux/firmware.h>
  58 #include <linux/delay.h>
  59 #include <linux/timer.h>
  60 #include <linux/vmalloc.h>
  61 #include <linux/crc32.h>
  62 #include <linux/moduleparam.h>
  63 #include <linux/io.h>
  64 #include <linux/log2.h>
  65 #include <net/checksum.h>
  66 #include <net/ip.h>
  67 #include <net/tcp.h>
  68 #include <asm/byteorder.h>
  69 #include <asm/io.h>
  70 #include <asm/processor.h>
  71 #ifdef CONFIG_MTRR
  72 #include <asm/mtrr.h>
  73 #endif
  74
  75 #include "myri10ge_mcp.h"
  76 #include "myri10ge_mcp_gen_header.h"
  77
  78 #define MYRI10GE_VERSION_STR "1.4.3-1.358"
  79
  80 MODULE_DESCRIPTION("Myricom 10G driver (10GbE)");
  81 MODULE_AUTHOR("Maintainer: help@myri.com");
  82 MODULE_VERSION(MYRI10GE_VERSION_STR);
  83 MODULE_LICENSE("Dual BSD/GPL");
  84
  85 #define MYRI10GE_MAX_ETHER_MTU 9014
  86
  87 #define MYRI10GE_ETH_STOPPED 0
  88 #define MYRI10GE_ETH_STOPPING 1
  89 #define MYRI10GE_ETH_STARTING 2
  90 #define MYRI10GE_ETH_RUNNING 3
  91 #define MYRI10GE_ETH_OPEN_FAILED 4
  92
  93 #define MYRI10GE_EEPROM_STRINGS_SIZE 256
  94 #define MYRI10GE_MAX_SEND_DESC_TSO ((65536 / 2048) * 2)
  95 #define MYRI10GE_MAX_LRO_DESCRIPTORS 8
  96 #define MYRI10GE_LRO_MAX_PKTS 64
  97
  98 #define MYRI10GE_NO_CONFIRM_DATA htonl(0xffffffff)
  99 #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff
 100
 101 #define MYRI10GE_ALLOC_ORDER 0
 102 #define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE)
 103 #define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1)
 104
 105 struct myri10ge_rx_buffer_state {
 106         struct page *page;
 107         int page_offset;
 108          DECLARE_PCI_UNMAP_ADDR(bus)
 109          DECLARE_PCI_UNMAP_LEN(len)
 110 };
 111
 112 struct myri10ge_tx_buffer_state {
 113         struct sk_buff *skb;
 114         int last;
 115          DECLARE_PCI_UNMAP_ADDR(bus)
 116          DECLARE_PCI_UNMAP_LEN(len)
 117 };
 118
 119 struct myri10ge_cmd {
 120         u32 data0;
 121         u32 data1;
 122         u32 data2;
 123 };
 124
 125 struct myri10ge_rx_buf {
 126         struct mcp_kreq_ether_recv __iomem *lanai;      /* lanai ptr for recv ring */
 127         struct mcp_kreq_ether_recv *shadow;     /* host shadow of recv ring */
 128         struct myri10ge_rx_buffer_state *info;
 129         struct page *page;
 130         dma_addr_t bus;
 131         int page_offset;
 132         int cnt;
 133         int fill_cnt;
 134         int alloc_fail;
 135         int mask;               /* number of rx slots -1 */
 136         int watchdog_needed;
 137 };
 138
 139 struct myri10ge_tx_buf {
 140         struct mcp_kreq_ether_send __iomem *lanai;      /* lanai ptr for sendq */
 141         struct mcp_kreq_ether_send *req_list;   /* host shadow of sendq */
 142         char *req_bytes;
 143         struct myri10ge_tx_buffer_state *info;
 144         int mask;               /* number of transmit slots -1  */
 145         int req ____cacheline_aligned;  /* transmit slots submitted     */
 146         int pkt_start;          /* packets started */
 147         int stop_queue;
 148         int linearized;
 149         int done ____cacheline_aligned; /* transmit slots completed     */
 150         int pkt_done;           /* packets completed */
 151         int wake_queue;
 152 };
 153
 154 struct myri10ge_rx_done {
 155         struct mcp_slot *entry;
 156         dma_addr_t bus;
 157         int cnt;
 158         int idx;
 159         struct net_lro_mgr lro_mgr;
 160         struct net_lro_desc lro_desc[MYRI10GE_MAX_LRO_DESCRIPTORS];
 161 };
 162
 163 struct myri10ge_slice_netstats {
 164         unsigned long rx_packets;
 165         unsigned long tx_packets;
 166         unsigned long rx_bytes;
 167         unsigned long tx_bytes;
 168         unsigned long rx_dropped;
 169         unsigned long tx_dropped;
 170 };
 171
 172 struct myri10ge_slice_state {
 173         struct myri10ge_tx_buf tx;      /* transmit ring        */
 174         struct myri10ge_rx_buf rx_small;
 175         struct myri10ge_rx_buf rx_big;
 176         struct myri10ge_rx_done rx_done;
 177         struct net_device *dev;
 178         struct napi_struct napi;
 179         struct myri10ge_priv *mgp;
 180         struct myri10ge_slice_netstats stats;
 181         __be32 __iomem *irq_claim;
 182         struct mcp_irq_data *fw_stats;
 183         dma_addr_t fw_stats_bus;
 184         int watchdog_tx_done;
 185         int watchdog_tx_req;
 186 #ifdef CONFIG_DCA
 187         int cached_dca_tag;
 188         int cpu;
 189         __be32 __iomem *dca_tag;
 190 #endif
 191         char irq_desc[32];
 192 };
 193
 194 struct myri10ge_priv {
 195         struct myri10ge_slice_state *ss;
 196         int tx_boundary;        /* boundary transmits cannot cross */
 197         int num_slices;
 198         int running;            /* running?             */
 199         int csum_flag;          /* rx_csums?            */
 200         int small_bytes;
 201         int big_bytes;
 202         int max_intr_slots;
 203         struct net_device *dev;
 204         struct net_device_stats stats;
 205         spinlock_t stats_lock;
 206         u8 __iomem *sram;
 207         int sram_size;
 208         unsigned long board_span;
 209         unsigned long iomem_base;
 210         __be32 __iomem *irq_deassert;
 211         char *mac_addr_string;
 212         struct mcp_cmd_response *cmd;
 213         dma_addr_t cmd_bus;
 214         struct pci_dev *pdev;
 215         int msi_enabled;
 216         int msix_enabled;
 217         struct msix_entry *msix_vectors;
 218 #ifdef CONFIG_DCA
 219         int dca_enabled;
 220 #endif
 221         u32 link_state;
 222         unsigned int rdma_tags_available;
 223         int intr_coal_delay;
 224         __be32 __iomem *intr_coal_delay_ptr;
 225         int mtrr;
 226         int wc_enabled;
 227         int down_cnt;
 228         wait_queue_head_t down_wq;
 229         struct work_struct watchdog_work;
 230         struct timer_list watchdog_timer;
 231         int watchdog_resets;
 232         int watchdog_pause;
 233         int pause;
 234         char *fw_name;
 235         char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
 236         char *product_code_string;
 237         char fw_version[128];
 238         int fw_ver_major;
 239         int fw_ver_minor;
 240         int fw_ver_tiny;
 241         int adopted_rx_filter_bug;
 242         u8 mac_addr[6];         /* eeprom mac address */
 243         unsigned long serial_number;
 244         int vendor_specific_offset;
 245         int fw_multicast_support;
 246         unsigned long features;
 247         u32 max_tso6;
 248         u32 read_dma;
 249         u32 write_dma;
 250         u32 read_write_dma;
 251         u32 link_changes;
 252         u32 msg_enable;
 253 };
 254
 255 static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
 256 static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
 257 static char *myri10ge_fw_rss_unaligned = "myri10ge_rss_ethp_z8e.dat";
 258 static char *myri10ge_fw_rss_aligned = "myri10ge_rss_eth_z8e.dat";
 259
 260 static char *myri10ge_fw_name = NULL;
 261 module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR);
 262 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name");
 263
 264 static int myri10ge_ecrc_enable = 1;
 265 module_param(myri10ge_ecrc_enable, int, S_IRUGO);
 266 MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E");
 267
 268 static int myri10ge_small_bytes = -1;   /* -1 == auto */
 269 module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR);
 270 MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets");
 271
 272 static int myri10ge_msi = 1;    /* enable msi by default */
 273 module_param(myri10ge_msi, int, S_IRUGO | S_IWUSR);
 274 MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts");
 275
 276 static int myri10ge_intr_coal_delay = 75;
 277 module_param(myri10ge_intr_coal_delay, int, S_IRUGO);
 278 MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay");
 279
 280 static int myri10ge_flow_control = 1;
 281 module_param(myri10ge_flow_control, int, S_IRUGO);
 282 MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter");
 283
 284 static int myri10ge_deassert_wait = 1;
 285 module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR);
 286 MODULE_PARM_DESC(myri10ge_deassert_wait,
 287                  "Wait when deasserting legacy interrupts");
 288
 289 static int myri10ge_force_firmware = 0;
 290 module_param(myri10ge_force_firmware, int, S_IRUGO);
 291 MODULE_PARM_DESC(myri10ge_force_firmware,
 292                  "Force firmware to assume aligned completions");
 293
 294 static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
 295 module_param(myri10ge_initial_mtu, int, S_IRUGO);
 296 MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU");
 297
 298 static int myri10ge_napi_weight = 64;
 299 module_param(myri10ge_napi_weight, int, S_IRUGO);
 300 MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight");
 301
 302 static int myri10ge_watchdog_timeout = 1;
 303 module_param(myri10ge_watchdog_timeout, int, S_IRUGO);
 304 MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout");
 305
 306 static int myri10ge_max_irq_loops = 1048576;
 307 module_param(myri10ge_max_irq_loops, int, S_IRUGO);
 308 MODULE_PARM_DESC(myri10ge_max_irq_loops,
 309                  "Set stuck legacy IRQ detection threshold");
 310
 311 #define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK
 312
 313 static int myri10ge_debug = -1; /* defaults above */
 314 module_param(myri10ge_debug, int, 0);
 315 MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)");
 316
 317 static int myri10ge_lro = 1;
 318 module_param(myri10ge_lro, int, S_IRUGO);
 319 MODULE_PARM_DESC(myri10ge_lro, "Enable large receive offload");
 320
 321 static int myri10ge_lro_max_pkts = MYRI10GE_LRO_MAX_PKTS;
 322 module_param(myri10ge_lro_max_pkts, int, S_IRUGO);
 323 MODULE_PARM_DESC(myri10ge_lro_max_pkts,
 324                  "Number of LRO packets to be aggregated");
 325
 326 static int myri10ge_fill_thresh = 256;
 327 module_param(myri10ge_fill_thresh, int, S_IRUGO | S_IWUSR);
 328 MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed");
 329
 330 static int myri10ge_reset_recover = 1;
 331
 332 static int myri10ge_max_slices = 1;
 333 module_param(myri10ge_max_slices, int, S_IRUGO);
 334 MODULE_PARM_DESC(myri10ge_max_slices, "Max tx/rx queues");
 335
 336 static int myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT;
 337 module_param(myri10ge_rss_hash, int, S_IRUGO);
 338 MODULE_PARM_DESC(myri10ge_rss_hash, "Type of RSS hashing to do");
 339
 340 static int myri10ge_dca = 1;
 341 module_param(myri10ge_dca, int, S_IRUGO);
 342 MODULE_PARM_DESC(myri10ge_dca, "Enable DCA if possible");
 343
 344 #define MYRI10GE_FW_OFFSET 1024*1024
 345 #define MYRI10GE_HIGHPART_TO_U32(X) \
 346 (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0)
 347 #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X))
 348
 349 #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8)
 350
 351 static void myri10ge_set_multicast_list(struct net_device *dev);
 352 static int myri10ge_sw_tso(struct sk_buff *skb, struct net_device *dev);
 353
 354 static inline void put_be32(__be32 val, __be32 __iomem * p)
 355 {
 356         __raw_writel((__force __u32) val, (__force void __iomem *)p);
 357 }
 358
 359 static int
 360 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
 361                   struct myri10ge_cmd *data, int atomic)
 362 {
 363         struct mcp_cmd *buf;
 364         char buf_bytes[sizeof(*buf) + 8];
 365         struct mcp_cmd_response *response = mgp->cmd;
 366         char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD;
 367         u32 dma_low, dma_high, result, value;
 368         int sleep_total = 0;
 369
 370         /* ensure buf is aligned to 8 bytes */
 371         buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8);
 372
 373         buf->data0 = htonl(data->data0);
 374         buf->data1 = htonl(data->data1);
 375         buf->data2 = htonl(data->data2);
 376         buf->cmd = htonl(cmd);
 377         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
 378         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
 379
 380         buf->response_addr.low = htonl(dma_low);
 381         buf->response_addr.high = htonl(dma_high);
 382         response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT);
 383         mb();
 384         myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf));
 385
 386         /* wait up to 15ms. Longest command is the DMA benchmark,
 387          * which is capped at 5ms, but runs from a timeout handler
 388          * that runs every 7.8ms. So a 15ms timeout leaves us with
 389          * a 2.2ms margin
 390          */
 391         if (atomic) {
 392                 /* if atomic is set, do not sleep,
 393                  * and try to get the completion quickly
 394                  * (1ms will be enough for those commands) */
 395                 for (sleep_total = 0;
 396                      sleep_total < 1000
 397                      && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
 398                      sleep_total += 10) {
 399                         udelay(10);
 400                         mb();
 401                 }
 402         } else {
 403                 /* use msleep for most command */
 404                 for (sleep_total = 0;
 405                      sleep_total < 15
 406                      && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
 407                      sleep_total++)
 408                         msleep(1);
 409         }
 410
 411         result = ntohl(response->result);
 412         value = ntohl(response->data);
 413         if (result != MYRI10GE_NO_RESPONSE_RESULT) {
 414                 if (result == 0) {
 415                         data->data0 = value;
 416                         return 0;
 417                 } else if (result == MXGEFW_CMD_UNKNOWN) {
 418                         return -ENOSYS;
 419                 } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) {
 420                         return -E2BIG;
 421                 } else {
 422                         dev_err(&mgp->pdev->dev,
 423                                 "command %d failed, result = %d\n",
 424                                 cmd, result);
 425                         return -ENXIO;
 426                 }
 427         }
 428
 429         dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
 430                 cmd, result);
 431         return -EAGAIN;
 432 }
 433
 434 /*
 435  * The eeprom strings on the lanaiX have the format
 436  * SN=x\0
 437  * MAC=x:x:x:x:x:x\0
 438  * PT:ddd mmm xx xx:xx:xx xx\0
 439  * PV:ddd mmm xx xx:xx:xx xx\0
 440  */
 441 static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp)
 442 {
 443         char *ptr, *limit;
 444         int i;
 445
 446         ptr = mgp->eeprom_strings;
 447         limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE;
 448
 449         while (*ptr != '\0' && ptr < limit) {
 450                 if (memcmp(ptr, "MAC=", 4) == 0) {
 451                         ptr += 4;
 452                         mgp->mac_addr_string = ptr;
 453                         for (i = 0; i < 6; i++) {
 454                                 if ((ptr + 2) > limit)
 455                                         goto abort;
 456                                 mgp->mac_addr[i] =
 457                                     simple_strtoul(ptr, &ptr, 16);
 458                                 ptr += 1;
 459                         }
 460                 }
 461                 if (memcmp(ptr, "PC=", 3) == 0) {
 462                         ptr += 3;
 463                         mgp->product_code_string = ptr;
 464                 }
 465                 if (memcmp((const void *)ptr, "SN=", 3) == 0) {
 466                         ptr += 3;
 467                         mgp->serial_number = simple_strtoul(ptr, &ptr, 10);
 468                 }
 469                 while (ptr < limit && *ptr++) ;
 470         }
 471
 472         return 0;
 473
 474 abort:
 475         dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n");
 476         return -ENXIO;
 477 }
 478
 479 /*
 480  * Enable or disable periodic RDMAs from the host to make certain
 481  * chipsets resend dropped PCIe messages
 482  */
 483
 484 static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable)
 485 {
 486         char __iomem *submit;
 487         __be32 buf[16] __attribute__ ((__aligned__(8)));
 488         u32 dma_low, dma_high;
 489         int i;
 490
 491         /* clear confirmation addr */
 492         mgp->cmd->data = 0;
 493         mb();
 494
 495         /* send a rdma command to the PCIe engine, and wait for the
 496          * response in the confirmation address.  The firmware should
 497          * write a -1 there to indicate it is alive and well
 498          */
 499         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
 500         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
 501
 502         buf[0] = htonl(dma_high);       /* confirm addr MSW */
 503         buf[1] = htonl(dma_low);        /* confirm addr LSW */
 504         buf[2] = MYRI10GE_NO_CONFIRM_DATA;      /* confirm data */
 505         buf[3] = htonl(dma_high);       /* dummy addr MSW */
 506         buf[4] = htonl(dma_low);        /* dummy addr LSW */
 507         buf[5] = htonl(enable); /* enable? */
 508
 509         submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA;
 510
 511         myri10ge_pio_copy(submit, &buf, sizeof(buf));
 512         for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++)
 513                 msleep(1);
 514         if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA)
 515                 dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n",
 516                         (enable ? "enable" : "disable"));
 517 }
 518
 519 static int
 520 myri10ge_validate_firmware(struct myri10ge_priv *mgp,
 521                            struct mcp_gen_header *hdr)
 522 {
 523         struct device *dev = &mgp->pdev->dev;
 524
 525         /* check firmware type */
 526         if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) {
 527                 dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type));
 528                 return -EINVAL;
 529         }
 530
 531         /* save firmware version for ethtool */
 532         strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
 533
 534         sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major,
 535                &mgp->fw_ver_minor, &mgp->fw_ver_tiny);
 536
 537         if (!(mgp->fw_ver_major == MXGEFW_VERSION_MAJOR
 538               && mgp->fw_ver_minor == MXGEFW_VERSION_MINOR)) {
 539                 dev_err(dev, "Found firmware version %s\n", mgp->fw_version);
 540                 dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR,
 541                         MXGEFW_VERSION_MINOR);
 542                 return -EINVAL;
 543         }
 544         return 0;
 545 }
 546
 547 static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
 548 {
 549         unsigned crc, reread_crc;
 550         const struct firmware *fw;
 551         struct device *dev = &mgp->pdev->dev;
 552         unsigned char *fw_readback;
 553         struct mcp_gen_header *hdr;
 554         size_t hdr_offset;
 555         int status;
 556         unsigned i;
 557
 558         if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) {
 559                 dev_err(dev, "Unable to load %s firmware image via hotplug\n",
 560                         mgp->fw_name);
 561                 status = -EINVAL;
 562                 goto abort_with_nothing;
 563         }
 564
 565         /* check size */
 566
 567         if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET ||
 568             fw->size < MCP_HEADER_PTR_OFFSET + 4) {
 569                 dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size);
 570                 status = -EINVAL;
 571                 goto abort_with_fw;
 572         }
 573
 574         /* check id */
 575         hdr_offset = ntohl(*(__be32 *) (fw->data + MCP_HEADER_PTR_OFFSET));
 576         if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) {
 577                 dev_err(dev, "Bad firmware file\n");
 578                 status = -EINVAL;
 579                 goto abort_with_fw;
 580         }
 581         hdr = (void *)(fw->data + hdr_offset);
 582
 583         status = myri10ge_validate_firmware(mgp, hdr);
 584         if (status != 0)
 585                 goto abort_with_fw;
 586
 587         crc = crc32(~0, fw->data, fw->size);
 588         for (i = 0; i < fw->size; i += 256) {
 589                 myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i,
 590                                   fw->data + i,
 591                                   min(256U, (unsigned)(fw->size - i)));
 592                 mb();
 593                 readb(mgp->sram);
 594         }
 595         fw_readback = vmalloc(fw->size);
 596         if (!fw_readback) {
 597                 status = -ENOMEM;
 598                 goto abort_with_fw;
 599         }
 600         /* corruption checking is good for parity recovery and buggy chipset */
 601         memcpy_fromio(fw_readback, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);
 602         reread_crc = crc32(~0, fw_readback, fw->size);
 603         vfree(fw_readback);
 604         if (crc != reread_crc) {
 605                 dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n",
 606                         (unsigned)fw->size, reread_crc, crc);
 607                 status = -EIO;
 608                 goto abort_with_fw;
 609         }
 610         *size = (u32) fw->size;
 611
 612 abort_with_fw:
 613         release_firmware(fw);
 614
 615 abort_with_nothing:
 616         return status;
 617 }
 618
 619 static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp)
 620 {
 621         struct mcp_gen_header *hdr;
 622         struct device *dev = &mgp->pdev->dev;
 623         const size_t bytes = sizeof(struct mcp_gen_header);
 624         size_t hdr_offset;
 625         int status;
 626
 627         /* find running firmware header */
 628         hdr_offset = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
 629
 630         if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) {
 631                 dev_err(dev, "Running firmware has bad header offset (%d)\n",
 632                         (int)hdr_offset);
 633                 return -EIO;
 634         }
 635
 636         /* copy header of running firmware from SRAM to host memory to
 637          * validate firmware */
 638         hdr = kmalloc(bytes, GFP_KERNEL);
 639         if (hdr == NULL) {
 640                 dev_err(dev, "could not malloc firmware hdr\n");
 641                 return -ENOMEM;
 642         }
 643         memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes);
 644         status = myri10ge_validate_firmware(mgp, hdr);
 645         kfree(hdr);
 646
 647         /* check to see if adopted firmware has bug where adopting
 648          * it will cause broadcasts to be filtered unless the NIC
 649          * is kept in ALLMULTI mode */
 650         if (mgp->fw_ver_major == 1 && mgp->fw_ver_minor == 4 &&
 651             mgp->fw_ver_tiny >= 4 && mgp->fw_ver_tiny <= 11) {
 652                 mgp->adopted_rx_filter_bug = 1;
 653                 dev_warn(dev, "Adopting fw %d.%d.%d: "
 654                          "working around rx filter bug\n",
 655                          mgp->fw_ver_major, mgp->fw_ver_minor,
 656                          mgp->fw_ver_tiny);
 657         }
 658         return status;
 659 }
 660
 661 static int myri10ge_get_firmware_capabilities(struct myri10ge_priv *mgp)
 662 {
 663         struct myri10ge_cmd cmd;
 664         int status;
 665
 666         /* probe for IPv6 TSO support */
 667         mgp->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
 668         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_TSO6_HDR_SIZE,
 669                                    &cmd, 0);
 670         if (status == 0) {
 671                 mgp->max_tso6 = cmd.data0;
 672                 mgp->features |= NETIF_F_TSO6;
 673         }
 674
 675         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
 676         if (status != 0) {
 677                 dev_err(&mgp->pdev->dev,
 678                         "failed MXGEFW_CMD_GET_RX_RING_SIZE\n");
 679                 return -ENXIO;
 680         }
 681
 682         mgp->max_intr_slots = 2 * (cmd.data0 / sizeof(struct mcp_dma_addr));
 683
 684         return 0;
 685 }
 686
 687 static int myri10ge_load_firmware(struct myri10ge_priv *mgp, int adopt)
 688 {
 689         char __iomem *submit;
 690         __be32 buf[16] __attribute__ ((__aligned__(8)));
 691         u32 dma_low, dma_high, size;
 692         int status, i;
 693
 694         size = 0;
 695         status = myri10ge_load_hotplug_firmware(mgp, &size);
 696         if (status) {
 697                 if (!adopt)
 698                         return status;
 699                 dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n");
 700
 701                 /* Do not attempt to adopt firmware if there
 702                  * was a bad crc */
 703                 if (status == -EIO)
 704                         return status;
 705
 706                 status = myri10ge_adopt_running_firmware(mgp);
 707                 if (status != 0) {
 708                         dev_err(&mgp->pdev->dev,
 709                                 "failed to adopt running firmware\n");
 710                         return status;
 711                 }
 712                 dev_info(&mgp->pdev->dev,
 713                          "Successfully adopted running firmware\n");
 714                 if (mgp->tx_boundary == 4096) {
 715                         dev_warn(&mgp->pdev->dev,
 716                                  "Using firmware currently running on NIC"
 717                                  ".  For optimal\n");
 718                         dev_warn(&mgp->pdev->dev,
 719                                  "performance consider loading optimized "
 720                                  "firmware\n");
 721                         dev_warn(&mgp->pdev->dev, "via hotplug\n");
 722                 }
 723
 724                 mgp->fw_name = "adopted";
 725                 mgp->tx_boundary = 2048;
 726                 myri10ge_dummy_rdma(mgp, 1);
 727                 status = myri10ge_get_firmware_capabilities(mgp);
 728                 return status;
 729         }
 730
 731         /* clear confirmation addr */
 732         mgp->cmd->data = 0;
 733         mb();
 734
 735         /* send a reload command to the bootstrap MCP, and wait for the
 736          *  response in the confirmation address.  The firmware should
 737          * write a -1 there to indicate it is alive and well
 738          */
 739         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
 740         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
 741
 742         buf[0] = htonl(dma_high);       /* confirm addr MSW */
 743         buf[1] = htonl(dma_low);        /* confirm addr LSW */
 744         buf[2] = MYRI10GE_NO_CONFIRM_DATA;      /* confirm data */
 745
 746         /* FIX: All newest firmware should un-protect the bottom of
 747          * the sram before handoff. However, the very first interfaces
 748          * do not. Therefore the handoff copy must skip the first 8 bytes
 749          */
 750         buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */
 751         buf[4] = htonl(size - 8);       /* length of code */
 752         buf[5] = htonl(8);      /* where to copy to */
 753         buf[6] = htonl(0);      /* where to jump to */
 754
 755         submit = mgp->sram + MXGEFW_BOOT_HANDOFF;
 756
 757         myri10ge_pio_copy(submit, &buf, sizeof(buf));
 758         mb();
 759         msleep(1);
 760         mb();
 761         i = 0;
 762         while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 9) {
 763                 msleep(1 << i);
 764                 i++;
 765         }
 766         if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) {
 767                 dev_err(&mgp->pdev->dev, "handoff failed\n");
 768                 return -ENXIO;
 769         }
 770         myri10ge_dummy_rdma(mgp, 1);
 771         status = myri10ge_get_firmware_capabilities(mgp);
 772
 773         return status;
 774 }
 775
 776 static int myri10ge_update_mac_address(struct myri10ge_priv *mgp, u8 * addr)
 777 {
 778         struct myri10ge_cmd cmd;
 779         int status;
 780
 781         cmd.data0 = ((addr[0] << 24) | (addr[1] << 16)
 782                      | (addr[2] << 8) | addr[3]);
 783
 784         cmd.data1 = ((addr[4] << 8) | (addr[5]));
 785
 786         status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0);
 787         return status;
 788 }
 789
 790 static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause)
 791 {
 792         struct myri10ge_cmd cmd;
 793         int status, ctl;
 794
 795         ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL;
 796         status = myri10ge_send_cmd(mgp, ctl, &cmd, 0);
 797
 798         if (status) {
 799                 printk(KERN_ERR
 800                        "myri10ge: %s: Failed to set flow control mode\n",
 801                        mgp->dev->name);
 802                 return status;
 803         }
 804         mgp->pause = pause;
 805         return 0;
 806 }
 807
 808 static void
 809 myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic)
 810 {
 811         struct myri10ge_cmd cmd;
 812         int status, ctl;
 813
 814         ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC;
 815         status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic);
 816         if (status)
 817                 printk(KERN_ERR "myri10ge: %s: Failed to set promisc mode\n",
 818                        mgp->dev->name);
 819 }
 820
 821 static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type)
 822 {
 823         struct myri10ge_cmd cmd;
 824         int status;
 825         u32 len;
 826         struct page *dmatest_page;
 827         dma_addr_t dmatest_bus;
 828         char *test = " ";
 829
 830         dmatest_page = alloc_page(GFP_KERNEL);
 831         if (!dmatest_page)
 832                 return -ENOMEM;
 833         dmatest_bus = pci_map_page(mgp->pdev, dmatest_page, 0, PAGE_SIZE,
 834                                    DMA_BIDIRECTIONAL);
 835
 836         /* Run a small DMA test.
 837          * The magic multipliers to the length tell the firmware
 838          * to do DMA read, write, or read+write tests.  The
 839          * results are returned in cmd.data0.  The upper 16
 840          * bits or the return is the number of transfers completed.
 841          * The lower 16 bits is the time in 0.5us ticks that the
 842          * transfers took to complete.
 843          */
 844
 845         len = mgp->tx_boundary;
 846
 847         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
 848         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
 849         cmd.data2 = len * 0x10000;
 850         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
 851         if (status != 0) {
 852                 test = "read";
 853                 goto abort;
 854         }
 855         mgp->read_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
 856         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
 857         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
 858         cmd.data2 = len * 0x1;
 859         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
 860         if (status != 0) {
 861                 test = "write";
 862                 goto abort;
 863         }
 864         mgp->write_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
 865
 866         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
 867         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
 868         cmd.data2 = len * 0x10001;
 869         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
 870         if (status != 0) {
 871                 test = "read/write";
 872                 goto abort;
 873         }
 874         mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) /
 875             (cmd.data0 & 0xffff);
 876
 877 abort:
 878         pci_unmap_page(mgp->pdev, dmatest_bus, PAGE_SIZE, DMA_BIDIRECTIONAL);
 879         put_page(dmatest_page);
 880
 881         if (status != 0 && test_type != MXGEFW_CMD_UNALIGNED_TEST)
 882                 dev_warn(&mgp->pdev->dev, "DMA %s benchmark failed: %d\n",
 883                          test, status);
 884
 885         return status;
 886 }
 887
 888 static int myri10ge_reset(struct myri10ge_priv *mgp)
 889 {
 890         struct myri10ge_cmd cmd;
 891         struct myri10ge_slice_state *ss;
 892         int i, status;
 893         size_t bytes;
 894 #ifdef CONFIG_DCA
 895         unsigned long dca_tag_off;
 896 #endif
 897
 898         /* try to send a reset command to the card to see if it
 899          * is alive */
 900         memset(&cmd, 0, sizeof(cmd));
 901         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
 902         if (status != 0) {
 903                 dev_err(&mgp->pdev->dev, "failed reset\n");
 904                 return -ENXIO;
 905         }
 906
 907         (void)myri10ge_dma_test(mgp, MXGEFW_DMA_TEST);
 908         /*
 909          * Use non-ndis mcp_slot (eg, 4 bytes total,
 910          * no toeplitz hash value returned.  Older firmware will
 911          * not understand this command, but will use the correct
 912          * sized mcp_slot, so we ignore error returns
 913          */
 914         cmd.data0 = MXGEFW_RSS_MCP_SLOT_TYPE_MIN;
 915         (void)myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_MCP_SLOT_TYPE, &cmd, 0);
 916
 917         /* Now exchange information about interrupts  */
 918
 919         bytes = mgp->max_intr_slots * sizeof(*mgp->ss[0].rx_done.entry);
 920         cmd.data0 = (u32) bytes;
 921         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
 922
 923         /*
 924          * Even though we already know how many slices are supported
 925          * via myri10ge_probe_slices() MXGEFW_CMD_GET_MAX_RSS_QUEUES
 926          * has magic side effects, and must be called after a reset.
 927          * It must be called prior to calling any RSS related cmds,
 928          * including assigning an interrupt queue for anything but
 929          * slice 0.  It must also be called *after*
 930          * MXGEFW_CMD_SET_INTRQ_SIZE, since the intrq size is used by
 931          * the firmware to compute offsets.
 932          */
 933
 934         if (mgp->num_slices > 1) {
 935
 936                 /* ask the maximum number of slices it supports */
 937                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES,
 938                                            &cmd, 0);
 939                 if (status != 0) {
 940                         dev_err(&mgp->pdev->dev,
 941                                 "failed to get number of slices\n");
 942                 }
 943
 944                 /*
 945                  * MXGEFW_CMD_ENABLE_RSS_QUEUES must be called prior
 946                  * to setting up the interrupt queue DMA
 947                  */
 948
 949                 cmd.data0 = mgp->num_slices;
 950                 cmd.data1 = 1;  /* use MSI-X */
 951                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
 952                                            &cmd, 0);
 953                 if (status != 0) {
 954                         dev_err(&mgp->pdev->dev,
 955                                 "failed to set number of slices\n");
 956
 957                         return status;
 958                 }
 959         }
 960         for (i = 0; i < mgp->num_slices; i++) {
 961                 ss = &mgp->ss[i];
 962                 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->rx_done.bus);
 963                 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->rx_done.bus);
 964                 cmd.data2 = i;
 965                 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA,
 966                                             &cmd, 0);
 967         };
 968
 969         status |=
 970             myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0);
 971         for (i = 0; i < mgp->num_slices; i++) {
 972                 ss = &mgp->ss[i];
 973                 ss->irq_claim =
 974                     (__iomem __be32 *) (mgp->sram + cmd.data0 + 8 * i);
 975         }
 976         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET,
 977                                     &cmd, 0);
 978         mgp->irq_deassert = (__iomem __be32 *) (mgp->sram + cmd.data0);
 979
 980         status |= myri10ge_send_cmd
 981             (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0);
 982         mgp->intr_coal_delay_ptr = (__iomem __be32 *) (mgp->sram + cmd.data0);
 983         if (status != 0) {
 984                 dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n");
 985                 return status;
 986         }
 987         put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
 988
 989 #ifdef CONFIG_DCA
 990         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_DCA_OFFSET, &cmd, 0);
 991         dca_tag_off = cmd.data0;
 992         for (i = 0; i < mgp->num_slices; i++) {
 993                 ss = &mgp->ss[i];
 994                 if (status == 0) {
 995                         ss->dca_tag = (__iomem __be32 *)
 996                             (mgp->sram + dca_tag_off + 4 * i);
 997                 } else {
 998                         ss->dca_tag = NULL;
 999                 }
1000         }
1001 #endif                          /* CONFIG_DCA */
1002
1003         /* reset mcp/driver shared state back to 0 */
1004
1005         mgp->link_changes = 0;
1006         for (i = 0; i < mgp->num_slices; i++) {
1007                 ss = &mgp->ss[i];
1008
1009                 memset(ss->rx_done.entry, 0, bytes);
1010                 ss->tx.req = 0;
1011                 ss->tx.done = 0;
1012                 ss->tx.pkt_start = 0;
1013                 ss->tx.pkt_done = 0;
1014                 ss->rx_big.cnt = 0;
1015                 ss->rx_small.cnt = 0;
1016                 ss->rx_done.idx = 0;
1017                 ss->rx_done.cnt = 0;
1018                 ss->tx.wake_queue = 0;
1019                 ss->tx.stop_queue = 0;
1020         }
1021
1022         status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr);
1023         myri10ge_change_pause(mgp, mgp->pause);
1024         myri10ge_set_multicast_list(mgp->dev);
1025         return status;
1026 }
1027
1028 #ifdef CONFIG_DCA
1029 static void
1030 myri10ge_write_dca(struct myri10ge_slice_state *ss, int cpu, int tag)
1031 {
1032         ss->cpu = cpu;
1033         ss->cached_dca_tag = tag;
1034         put_be32(htonl(tag), ss->dca_tag);
1035 }
1036
1037 static inline void myri10ge_update_dca(struct myri10ge_slice_state *ss)
1038 {
1039         int cpu = get_cpu();
1040         int tag;
1041
1042         if (cpu != ss->cpu) {
1043                 tag = dca_get_tag(cpu);
1044                 if (ss->cached_dca_tag != tag)
1045                         myri10ge_write_dca(ss, cpu, tag);
1046         }
1047         put_cpu();
1048 }
1049
1050 static void myri10ge_setup_dca(struct myri10ge_priv *mgp)
1051 {
1052         int err, i;
1053         struct pci_dev *pdev = mgp->pdev;
1054
1055         if (mgp->ss[0].dca_tag == NULL || mgp->dca_enabled)
1056                 return;
1057         if (!myri10ge_dca) {
1058                 dev_err(&pdev->dev, "dca disabled by administrator\n");
1059                 return;
1060         }
1061         err = dca_add_requester(&pdev->dev);
1062         if (err) {
1063                 dev_err(&pdev->dev,
1064                         "dca_add_requester() failed, err=%d\n", err);
1065                 return;
1066         }
1067         mgp->dca_enabled = 1;
1068         for (i = 0; i < mgp->num_slices; i++)
1069                 myri10ge_write_dca(&mgp->ss[i], -1, 0);
1070 }
1071
1072 static void myri10ge_teardown_dca(struct myri10ge_priv *mgp)
1073 {
1074         struct pci_dev *pdev = mgp->pdev;
1075         int err;
1076
1077         if (!mgp->dca_enabled)
1078                 return;
1079         mgp->dca_enabled = 0;
1080         err = dca_remove_requester(&pdev->dev);
1081 }
1082
1083 static int myri10ge_notify_dca_device(struct device *dev, void *data)
1084 {
1085         struct myri10ge_priv *mgp;
1086         unsigned long event;
1087
1088         mgp = dev_get_drvdata(dev);
1089         event = *(unsigned long *)data;
1090
1091         if (event == DCA_PROVIDER_ADD)
1092                 myri10ge_setup_dca(mgp);
1093         else if (event == DCA_PROVIDER_REMOVE)
1094                 myri10ge_teardown_dca(mgp);
1095         return 0;
1096 }
1097 #endif                          /* CONFIG_DCA */
1098
1099 static inline void
1100 myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst,
1101                     struct mcp_kreq_ether_recv *src)
1102 {
1103         __be32 low;
1104
1105         low = src->addr_low;
1106         src->addr_low = htonl(DMA_32BIT_MASK);
1107         myri10ge_pio_copy(dst, src, 4 * sizeof(*src));
1108         mb();
1109         myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src));
1110         mb();
1111         src->addr_low = low;
1112         put_be32(low, &dst->addr_low);
1113         mb();
1114 }
1115
1116 static inline void myri10ge_vlan_ip_csum(struct sk_buff *skb, __wsum hw_csum)
1117 {
1118         struct vlan_hdr *vh = (struct vlan_hdr *)(skb->data);
1119
1120         if ((skb->protocol == htons(ETH_P_8021Q)) &&
1121             (vh->h_vlan_encapsulated_proto == htons(ETH_P_IP) ||
1122              vh->h_vlan_encapsulated_proto == htons(ETH_P_IPV6))) {
1123                 skb->csum = hw_csum;
1124                 skb->ip_summed = CHECKSUM_COMPLETE;
1125         }
1126 }
1127
1128 static inline void
1129 myri10ge_rx_skb_build(struct sk_buff *skb, u8 * va,
1130                       struct skb_frag_struct *rx_frags, int len, int hlen)
1131 {
1132         struct skb_frag_struct *skb_frags;
1133
1134         skb->len = skb->data_len = len;
1135         skb->truesize = len + sizeof(struct sk_buff);
1136         /* attach the page(s) */
1137
1138         skb_frags = skb_shinfo(skb)->frags;
1139         while (len > 0) {
1140                 memcpy(skb_frags, rx_frags, sizeof(*skb_frags));
1141                 len -= rx_frags->size;
1142                 skb_frags++;
1143                 rx_frags++;
1144                 skb_shinfo(skb)->nr_frags++;
1145         }
1146
1147         /* pskb_may_pull is not available in irq context, but
1148          * skb_pull() (for ether_pad and eth_type_trans()) requires
1149          * the beginning of the packet in skb_headlen(), move it
1150          * manually */
1151         skb_copy_to_linear_data(skb, va, hlen);
1152         skb_shinfo(skb)->frags[0].page_offset += hlen;
1153         skb_shinfo(skb)->frags[0].size -= hlen;
1154         skb->data_len -= hlen;
1155         skb->tail += hlen;
1156         skb_pull(skb, MXGEFW_PAD);
1157 }
1158
1159 static void
1160 myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
1161                         int bytes, int watchdog)
1162 {
1163         struct page *page;
1164         int idx;
1165
1166         if (unlikely(rx->watchdog_needed && !watchdog))
1167                 return;
1168
1169         /* try to refill entire ring */
1170         while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) {
1171                 idx = rx->fill_cnt & rx->mask;
1172                 if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) {
1173                         /* we can use part of previous page */
1174                         get_page(rx->page);
1175                 } else {
1176                         /* we need a new page */
1177                         page =
1178                             alloc_pages(GFP_ATOMIC | __GFP_COMP,
1179                                         MYRI10GE_ALLOC_ORDER);
1180                         if (unlikely(page == NULL)) {
1181                                 if (rx->fill_cnt - rx->cnt < 16)
1182                                         rx->watchdog_needed = 1;
1183                                 return;
1184                         }
1185                         rx->page = page;
1186                         rx->page_offset = 0;
1187                         rx->bus = pci_map_page(mgp->pdev, page, 0,
1188                                                MYRI10GE_ALLOC_SIZE,
1189                                                PCI_DMA_FROMDEVICE);
1190                 }
1191                 rx->info[idx].page = rx->page;
1192                 rx->info[idx].page_offset = rx->page_offset;
1193                 /* note that this is the address of the start of the
1194                  * page */
1195                 pci_unmap_addr_set(&rx->info[idx], bus, rx->bus);
1196                 rx->shadow[idx].addr_low =
1197                     htonl(MYRI10GE_LOWPART_TO_U32(rx->bus) + rx->page_offset);
1198                 rx->shadow[idx].addr_high =
1199                     htonl(MYRI10GE_HIGHPART_TO_U32(rx->bus));
1200
1201                 /* start next packet on a cacheline boundary */
1202                 rx->page_offset += SKB_DATA_ALIGN(bytes);
1203
1204 #if MYRI10GE_ALLOC_SIZE > 4096
1205                 /* don't cross a 4KB boundary */
1206                 if ((rx->page_offset >> 12) !=
1207                     ((rx->page_offset + bytes - 1) >> 12))
1208                         rx->page_offset = (rx->page_offset + 4096) & ~4095;
1209 #endif
1210                 rx->fill_cnt++;
1211
1212                 /* copy 8 descriptors to the firmware at a time */
1213                 if ((idx & 7) == 7) {
1214                         myri10ge_submit_8rx(&rx->lanai[idx - 7],
1215                                             &rx->shadow[idx - 7]);
1216                 }
1217         }
1218 }
1219
1220 static inline void
1221 myri10ge_unmap_rx_page(struct pci_dev *pdev,
1222                        struct myri10ge_rx_buffer_state *info, int bytes)
1223 {
1224         /* unmap the recvd page if we're the only or last user of it */
1225         if (bytes >= MYRI10GE_ALLOC_SIZE / 2 ||
1226             (info->page_offset + 2 * bytes) > MYRI10GE_ALLOC_SIZE) {
1227                 pci_unmap_page(pdev, (pci_unmap_addr(info, bus)
1228                                       & ~(MYRI10GE_ALLOC_SIZE - 1)),
1229                                MYRI10GE_ALLOC_SIZE, PCI_DMA_FROMDEVICE);
1230         }
1231 }
1232
1233 #define MYRI10GE_HLEN 64        /* The number of bytes to copy from a
1234                                  * page into an skb */
1235
1236 static inline int
1237 myri10ge_rx_done(struct myri10ge_slice_state *ss, struct myri10ge_rx_buf *rx,
1238                  int bytes, int len, __wsum csum)
1239 {
1240         struct myri10ge_priv *mgp = ss->mgp;
1241         struct sk_buff *skb;
1242         struct skb_frag_struct rx_frags[MYRI10GE_MAX_FRAGS_PER_FRAME];
1243         int i, idx, hlen, remainder;
1244         struct pci_dev *pdev = mgp->pdev;
1245         struct net_device *dev = mgp->dev;
1246         u8 *va;
1247
1248         len += MXGEFW_PAD;
1249         idx = rx->cnt & rx->mask;
1250         va = page_address(rx->info[idx].page) + rx->info[idx].page_offset;
1251         prefetch(va);
1252         /* Fill skb_frag_struct(s) with data from our receive */
1253         for (i = 0, remainder = len; remainder > 0; i++) {
1254                 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1255                 rx_frags[i].page = rx->info[idx].page;
1256                 rx_frags[i].page_offset = rx->info[idx].page_offset;
1257                 if (remainder < MYRI10GE_ALLOC_SIZE)
1258                         rx_frags[i].size = remainder;
1259                 else
1260                         rx_frags[i].size = MYRI10GE_ALLOC_SIZE;
1261                 rx->cnt++;
1262                 idx = rx->cnt & rx->mask;
1263                 remainder -= MYRI10GE_ALLOC_SIZE;
1264         }
1265
1266         if (mgp->csum_flag && myri10ge_lro) {
1267                 rx_frags[0].page_offset += MXGEFW_PAD;
1268                 rx_frags[0].size -= MXGEFW_PAD;
1269                 len -= MXGEFW_PAD;
1270                 lro_receive_frags(&ss->rx_done.lro_mgr, rx_frags,
1271                                   /* opaque, will come back in get_frag_header */
1272                                   len, len,
1273                                   (void *)(__force unsigned long)csum, csum);
1274
1275                 return 1;
1276         }
1277
1278         hlen = MYRI10GE_HLEN > len ? len : MYRI10GE_HLEN;
1279
1280         /* allocate an skb to attach the page(s) to. This is done
1281          * after trying LRO, so as to avoid skb allocation overheads */
1282
1283         skb = netdev_alloc_skb(dev, MYRI10GE_HLEN + 16);
1284         if (unlikely(skb == NULL)) {
1285                 mgp->stats.rx_dropped++;
1286                 do {
1287                         i--;
1288                         put_page(rx_frags[i].page);
1289                 } while (i != 0);
1290                 return 0;
1291         }
1292
1293         /* Attach the pages to the skb, and trim off any padding */
1294         myri10ge_rx_skb_build(skb, va, rx_frags, len, hlen);
1295         if (skb_shinfo(skb)->frags[0].size <= 0) {
1296                 put_page(skb_shinfo(skb)->frags[0].page);
1297                 skb_shinfo(skb)->nr_frags = 0;
1298         }
1299         skb->protocol = eth_type_trans(skb, dev);
1300
1301         if (mgp->csum_flag) {
1302                 if ((skb->protocol == htons(ETH_P_IP)) ||
1303                     (skb->protocol == htons(ETH_P_IPV6))) {
1304                         skb->csum = csum;
1305                         skb->ip_summed = CHECKSUM_COMPLETE;
1306                 } else
1307                         myri10ge_vlan_ip_csum(skb, csum);
1308         }
1309         netif_receive_skb(skb);
1310         dev->last_rx = jiffies;
1311         return 1;
1312 }
1313
1314 static inline void
1315 myri10ge_tx_done(struct myri10ge_slice_state *ss, int mcp_index)
1316 {
1317         struct pci_dev *pdev = ss->mgp->pdev;
1318         struct myri10ge_tx_buf *tx = &ss->tx;
1319         struct sk_buff *skb;
1320         int idx, len;
1321
1322         while (tx->pkt_done != mcp_index) {
1323                 idx = tx->done & tx->mask;
1324                 skb = tx->info[idx].skb;
1325
1326                 /* Mark as free */
1327                 tx->info[idx].skb = NULL;
1328                 if (tx->info[idx].last) {
1329                         tx->pkt_done++;
1330                         tx->info[idx].last = 0;
1331                 }
1332                 tx->done++;
1333                 len = pci_unmap_len(&tx->info[idx], len);
1334                 pci_unmap_len_set(&tx->info[idx], len, 0);
1335                 if (skb) {
1336                         ss->stats.tx_bytes += skb->len;
1337                         ss->stats.tx_packets++;
1338                         dev_kfree_skb_irq(skb);
1339                         if (len)
1340                                 pci_unmap_single(pdev,
1341                                                  pci_unmap_addr(&tx->info[idx],
1342                                                                 bus), len,
1343                                                  PCI_DMA_TODEVICE);
1344                 } else {
1345                         if (len)
1346                                 pci_unmap_page(pdev,
1347                                                pci_unmap_addr(&tx->info[idx],
1348                                                               bus), len,
1349                                                PCI_DMA_TODEVICE);
1350                 }
1351         }
1352         /* start the queue if we've stopped it */
1353         if (netif_queue_stopped(ss->dev)
1354             && tx->req - tx->done < (tx->mask >> 1)) {
1355                 tx->wake_queue++;
1356                 netif_wake_queue(ss->dev);
1357         }
1358 }
1359
1360 static inline int
1361 myri10ge_clean_rx_done(struct myri10ge_slice_state *ss, int budget)
1362 {
1363         struct myri10ge_rx_done *rx_done = &ss->rx_done;
1364         struct myri10ge_priv *mgp = ss->mgp;
1365         unsigned long rx_bytes = 0;
1366         unsigned long rx_packets = 0;
1367         unsigned long rx_ok;
1368
1369         int idx = rx_done->idx;
1370         int cnt = rx_done->cnt;
1371         int work_done = 0;
1372         u16 length;
1373         __wsum checksum;
1374
1375         while (rx_done->entry[idx].length != 0 && work_done < budget) {
1376                 length = ntohs(rx_done->entry[idx].length);
1377                 rx_done->entry[idx].length = 0;
1378                 checksum = csum_unfold(rx_done->entry[idx].checksum);
1379                 if (length <= mgp->small_bytes)
1380                         rx_ok = myri10ge_rx_done(ss, &ss->rx_small,
1381                                                  mgp->small_bytes,
1382                                                  length, checksum);
1383                 else
1384                         rx_ok = myri10ge_rx_done(ss, &ss->rx_big,
1385                                                  mgp->big_bytes,
1386                                                  length, checksum);
1387                 rx_packets += rx_ok;
1388                 rx_bytes += rx_ok * (unsigned long)length;
1389                 cnt++;
1390                 idx = cnt & (mgp->max_intr_slots - 1);
1391                 work_done++;
1392         }
1393         rx_done->idx = idx;
1394         rx_done->cnt = cnt;
1395         ss->stats.rx_packets += rx_packets;
1396         ss->stats.rx_bytes += rx_bytes;
1397
1398         if (myri10ge_lro)
1399                 lro_flush_all(&rx_done->lro_mgr);
1400
1401         /* restock receive rings if needed */
1402         if (ss->rx_small.fill_cnt - ss->rx_small.cnt < myri10ge_fill_thresh)
1403                 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
1404                                         mgp->small_bytes + MXGEFW_PAD, 0);
1405         if (ss->rx_big.fill_cnt - ss->rx_big.cnt < myri10ge_fill_thresh)
1406                 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
1407
1408         return work_done;
1409 }
1410
1411 static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
1412 {
1413         struct mcp_irq_data *stats = mgp->ss[0].fw_stats;
1414
1415         if (unlikely(stats->stats_updated)) {
1416                 unsigned link_up = ntohl(stats->link_up);
1417                 if (mgp->link_state != link_up) {
1418                         mgp->link_state = link_up;
1419
1420                         if (mgp->link_state == MXGEFW_LINK_UP) {
1421                                 if (netif_msg_link(mgp))
1422                                         printk(KERN_INFO
1423                                                "myri10ge: %s: link up\n",
1424                                                mgp->dev->name);
1425                                 netif_carrier_on(mgp->dev);
1426                                 mgp->link_changes++;
1427                         } else {
1428                                 if (netif_msg_link(mgp))
1429                                         printk(KERN_INFO
1430                                                "myri10ge: %s: link %s\n",
1431                                                mgp->dev->name,
1432                                                (link_up == MXGEFW_LINK_MYRINET ?
1433                                                 "mismatch (Myrinet detected)" :
1434                                                 "down"));
1435                                 netif_carrier_off(mgp->dev);
1436                                 mgp->link_changes++;
1437                         }
1438                 }
1439                 if (mgp->rdma_tags_available !=
1440                     ntohl(stats->rdma_tags_available)) {
1441                         mgp->rdma_tags_available =
1442                             ntohl(stats->rdma_tags_available);
1443                         printk(KERN_WARNING "myri10ge: %s: RDMA timed out! "
1444                                "%d tags left\n", mgp->dev->name,
1445                                mgp->rdma_tags_available);
1446                 }
1447                 mgp->down_cnt += stats->link_down;
1448                 if (stats->link_down)
1449                         wake_up(&mgp->down_wq);
1450         }
1451 }
1452
1453 static int myri10ge_poll(struct napi_struct *napi, int budget)
1454 {
1455         struct myri10ge_slice_state *ss =
1456             container_of(napi, struct myri10ge_slice_state, napi);
1457         struct net_device *netdev = ss->mgp->dev;
1458         int work_done;
1459
1460 #ifdef CONFIG_DCA
1461         if (ss->mgp->dca_enabled)
1462                 myri10ge_update_dca(ss);
1463 #endif
1464
1465         /* process as many rx events as NAPI will allow */
1466         work_done = myri10ge_clean_rx_done(ss, budget);
1467
1468         if (work_done < budget) {
1469                 netif_rx_complete(netdev, napi);
1470                 put_be32(htonl(3), ss->irq_claim);
1471         }
1472         return work_done;
1473 }
1474
1475 static irqreturn_t myri10ge_intr(int irq, void *arg)
1476 {
1477         struct myri10ge_slice_state *ss = arg;
1478         struct myri10ge_priv *mgp = ss->mgp;
1479         struct mcp_irq_data *stats = ss->fw_stats;
1480         struct myri10ge_tx_buf *tx = &ss->tx;
1481         u32 send_done_count;
1482         int i;
1483
1484         /* an interrupt on a non-zero slice is implicitly valid
1485          * since MSI-X irqs are not shared */
1486         if (ss != mgp->ss) {
1487                 netif_rx_schedule(ss->dev, &ss->napi);
1488                 return (IRQ_HANDLED);
1489         }
1490
1491         /* make sure it is our IRQ, and that the DMA has finished */
1492         if (unlikely(!stats->valid))
1493                 return (IRQ_NONE);
1494
1495         /* low bit indicates receives are present, so schedule
1496          * napi poll handler */
1497         if (stats->valid & 1)
1498                 netif_rx_schedule(ss->dev, &ss->napi);
1499
1500         if (!mgp->msi_enabled && !mgp->msix_enabled) {
1501                 put_be32(0, mgp->irq_deassert);
1502                 if (!myri10ge_deassert_wait)
1503                         stats->valid = 0;
1504                 mb();
1505         } else
1506                 stats->valid = 0;
1507
1508         /* Wait for IRQ line to go low, if using INTx */
1509         i = 0;
1510         while (1) {
1511                 i++;
1512                 /* check for transmit completes and receives */
1513                 send_done_count = ntohl(stats->send_done_count);
1514                 if (send_done_count != tx->pkt_done)
1515                         myri10ge_tx_done(ss, (int)send_done_count);
1516                 if (unlikely(i > myri10ge_max_irq_loops)) {
1517                         printk(KERN_WARNING "myri10ge: %s: irq stuck?\n",
1518                                mgp->dev->name);
1519                         stats->valid = 0;
1520                         schedule_work(&mgp->watchdog_work);
1521                 }
1522                 if (likely(stats->valid == 0))
1523                         break;
1524                 cpu_relax();
1525                 barrier();
1526         }
1527
1528         myri10ge_check_statblock(mgp);
1529
1530         put_be32(htonl(3), ss->irq_claim + 1);
1531         return (IRQ_HANDLED);
1532 }
1533
1534 static int
1535 myri10ge_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
1536 {
1537         struct myri10ge_priv *mgp = netdev_priv(netdev);
1538         char *ptr;
1539         int i;
1540
1541         cmd->autoneg = AUTONEG_DISABLE;
1542         cmd->speed = SPEED_10000;
1543         cmd->duplex = DUPLEX_FULL;
1544
1545         /*
1546          * parse the product code to deterimine the interface type
1547          * (CX4, XFP, Quad Ribbon Fiber) by looking at the character
1548          * after the 3rd dash in the driver's cached copy of the
1549          * EEPROM's product code string.
1550          */
1551         ptr = mgp->product_code_string;
1552         if (ptr == NULL) {
1553                 printk(KERN_ERR "myri10ge: %s: Missing product code\n",
1554                        netdev->name);
1555                 return 0;
1556         }
1557         for (i = 0; i < 3; i++, ptr++) {
1558                 ptr = strchr(ptr, '-');
1559                 if (ptr == NULL) {
1560                         printk(KERN_ERR "myri10ge: %s: Invalid product "
1561                                "code %s\n", netdev->name,
1562                                mgp->product_code_string);
1563                         return 0;
1564                 }
1565         }
1566         if (*ptr == 'R' || *ptr == 'Q') {
1567                 /* We've found either an XFP or quad ribbon fiber */
1568                 cmd->port = PORT_FIBRE;
1569         }
1570         return 0;
1571 }
1572
1573 static void
1574 myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
1575 {
1576         struct myri10ge_priv *mgp = netdev_priv(netdev);
1577
1578         strlcpy(info->driver, "myri10ge", sizeof(info->driver));
1579         strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version));
1580         strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version));
1581         strlcpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info));
1582 }
1583
1584 static int
1585 myri10ge_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1586 {
1587         struct myri10ge_priv *mgp = netdev_priv(netdev);
1588
1589         coal->rx_coalesce_usecs = mgp->intr_coal_delay;
1590         return 0;
1591 }
1592
1593 static int
1594 myri10ge_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1595 {
1596         struct myri10ge_priv *mgp = netdev_priv(netdev);
1597
1598         mgp->intr_coal_delay = coal->rx_coalesce_usecs;
1599         put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1600         return 0;
1601 }
1602
1603 static void
1604 myri10ge_get_pauseparam(struct net_device *netdev,
1605                         struct ethtool_pauseparam *pause)
1606 {
1607         struct myri10ge_priv *mgp = netdev_priv(netdev);
1608
1609         pause->autoneg = 0;
1610         pause->rx_pause = mgp->pause;
1611         pause->tx_pause = mgp->pause;
1612 }
1613
1614 static int
1615 myri10ge_set_pauseparam(struct net_device *netdev,
1616                         struct ethtool_pauseparam *pause)
1617 {
1618         struct myri10ge_priv *mgp = netdev_priv(netdev);
1619
1620         if (pause->tx_pause != mgp->pause)
1621                 return myri10ge_change_pause(mgp, pause->tx_pause);
1622         if (pause->rx_pause != mgp->pause)
1623                 return myri10ge_change_pause(mgp, pause->tx_pause);
1624         if (pause->autoneg != 0)
1625                 return -EINVAL;
1626         return 0;
1627 }
1628
1629 static void
1630 myri10ge_get_ringparam(struct net_device *netdev,
1631                        struct ethtool_ringparam *ring)
1632 {
1633         struct myri10ge_priv *mgp = netdev_priv(netdev);
1634
1635         ring->rx_mini_max_pending = mgp->ss[0].rx_small.mask + 1;
1636         ring->rx_max_pending = mgp->ss[0].rx_big.mask + 1;
1637         ring->rx_jumbo_max_pending = 0;
1638         ring->tx_max_pending = mgp->ss[0].rx_small.mask + 1;
1639         ring->rx_mini_pending = ring->rx_mini_max_pending;
1640         ring->rx_pending = ring->rx_max_pending;
1641         ring->rx_jumbo_pending = ring->rx_jumbo_max_pending;
1642         ring->tx_pending = ring->tx_max_pending;
1643 }
1644
1645 static u32 myri10ge_get_rx_csum(struct net_device *netdev)
1646 {
1647         struct myri10ge_priv *mgp = netdev_priv(netdev);
1648
1649         if (mgp->csum_flag)
1650                 return 1;
1651         else
1652                 return 0;
1653 }
1654
1655 static int myri10ge_set_rx_csum(struct net_device *netdev, u32 csum_enabled)
1656 {
1657         struct myri10ge_priv *mgp = netdev_priv(netdev);
1658
1659         if (csum_enabled)
1660                 mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
1661         else
1662                 mgp->csum_flag = 0;
1663         return 0;
1664 }
1665
1666 static int myri10ge_set_tso(struct net_device *netdev, u32 tso_enabled)
1667 {
1668         struct myri10ge_priv *mgp = netdev_priv(netdev);
1669         unsigned long flags = mgp->features & (NETIF_F_TSO6 | NETIF_F_TSO);
1670
1671         if (tso_enabled)
1672                 netdev->features |= flags;
1673         else
1674                 netdev->features &= ~flags;
1675         return 0;
1676 }
1677
1678 static const char myri10ge_gstrings_main_stats[][ETH_GSTRING_LEN] = {
1679         "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
1680         "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
1681         "rx_length_errors", "rx_over_errors", "rx_crc_errors",
1682         "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
1683         "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
1684         "tx_heartbeat_errors", "tx_window_errors",
1685         /* device-specific stats */
1686         "tx_boundary", "WC", "irq", "MSI", "MSIX",
1687         "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
1688         "serial_number", "watchdog_resets",
1689 #ifdef CONFIG_DCA
1690         "dca_capable", "dca_enabled",
1691 #endif
1692         "link_changes", "link_up", "dropped_link_overflow",
1693         "dropped_link_error_or_filtered",
1694         "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32",
1695         "dropped_unicast_filtered", "dropped_multicast_filtered",
1696         "dropped_runt", "dropped_overrun", "dropped_no_small_buffer",
1697         "dropped_no_big_buffer"
1698 };
1699
1700 static const char myri10ge_gstrings_slice_stats[][ETH_GSTRING_LEN] = {
1701         "----------- slice ---------",
1702         "tx_pkt_start", "tx_pkt_done", "tx_req", "tx_done",
1703         "rx_small_cnt", "rx_big_cnt",
1704         "wake_queue", "stop_queue", "tx_linearized", "LRO aggregated",
1705             "LRO flushed",
1706         "LRO avg aggr", "LRO no_desc"
1707 };
1708
1709 #define MYRI10GE_NET_STATS_LEN      21
1710 #define MYRI10GE_MAIN_STATS_LEN  ARRAY_SIZE(myri10ge_gstrings_main_stats)
1711 #define MYRI10GE_SLICE_STATS_LEN  ARRAY_SIZE(myri10ge_gstrings_slice_stats)
1712
1713 static void
1714 myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
1715 {
1716         struct myri10ge_priv *mgp = netdev_priv(netdev);
1717         int i;
1718
1719         switch (stringset) {
1720         case ETH_SS_STATS:
1721                 memcpy(data, *myri10ge_gstrings_main_stats,
1722                        sizeof(myri10ge_gstrings_main_stats));
1723                 data += sizeof(myri10ge_gstrings_main_stats);
1724                 for (i = 0; i < mgp->num_slices; i++) {
1725                         memcpy(data, *myri10ge_gstrings_slice_stats,
1726                                sizeof(myri10ge_gstrings_slice_stats));
1727                         data += sizeof(myri10ge_gstrings_slice_stats);
1728                 }
1729                 break;
1730         }
1731 }
1732
1733 static int myri10ge_get_sset_count(struct net_device *netdev, int sset)
1734 {
1735         struct myri10ge_priv *mgp = netdev_priv(netdev);
1736
1737         switch (sset) {
1738         case ETH_SS_STATS:
1739                 return MYRI10GE_MAIN_STATS_LEN +
1740                     mgp->num_slices * MYRI10GE_SLICE_STATS_LEN;
1741         default:
1742                 return -EOPNOTSUPP;
1743         }
1744 }
1745
1746 static void
1747 myri10ge_get_ethtool_stats(struct net_device *netdev,
1748                            struct ethtool_stats *stats, u64 * data)
1749 {
1750         struct myri10ge_priv *mgp = netdev_priv(netdev);
1751         struct myri10ge_slice_state *ss;
1752         int slice;
1753         int i;
1754
1755         for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++)
1756                 data[i] = ((unsigned long *)&mgp->stats)[i];
1757
1758         data[i++] = (unsigned int)mgp->tx_boundary;
1759         data[i++] = (unsigned int)mgp->wc_enabled;
1760         data[i++] = (unsigned int)mgp->pdev->irq;
1761         data[i++] = (unsigned int)mgp->msi_enabled;
1762         data[i++] = (unsigned int)mgp->msix_enabled;
1763         data[i++] = (unsigned int)mgp->read_dma;
1764         data[i++] = (unsigned int)mgp->write_dma;
1765         data[i++] = (unsigned int)mgp->read_write_dma;
1766         data[i++] = (unsigned int)mgp->serial_number;
1767         data[i++] = (unsigned int)mgp->watchdog_resets;
1768 #ifdef CONFIG_DCA
1769         data[i++] = (unsigned int)(mgp->ss[0].dca_tag != NULL);
1770         data[i++] = (unsigned int)(mgp->dca_enabled);
1771 #endif
1772         data[i++] = (unsigned int)mgp->link_changes;
1773
1774         /* firmware stats are useful only in the first slice */
1775         ss = &mgp->ss[0];
1776         data[i++] = (unsigned int)ntohl(ss->fw_stats->link_up);
1777         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_link_overflow);
1778         data[i++] =
1779             (unsigned int)ntohl(ss->fw_stats->dropped_link_error_or_filtered);
1780         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_pause);
1781         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_phy);
1782         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_crc32);
1783         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_unicast_filtered);
1784         data[i++] =
1785             (unsigned int)ntohl(ss->fw_stats->dropped_multicast_filtered);
1786         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_runt);
1787         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_overrun);
1788         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_small_buffer);
1789         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_big_buffer);
1790
1791         for (slice = 0; slice < mgp->num_slices; slice++) {
1792                 ss = &mgp->ss[slice];
1793                 data[i++] = slice;
1794                 data[i++] = (unsigned int)ss->tx.pkt_start;
1795                 data[i++] = (unsigned int)ss->tx.pkt_done;
1796                 data[i++] = (unsigned int)ss->tx.req;
1797                 data[i++] = (unsigned int)ss->tx.done;
1798                 data[i++] = (unsigned int)ss->rx_small.cnt;
1799                 data[i++] = (unsigned int)ss->rx_big.cnt;
1800                 data[i++] = (unsigned int)ss->tx.wake_queue;
1801                 data[i++] = (unsigned int)ss->tx.stop_queue;
1802                 data[i++] = (unsigned int)ss->tx.linearized;
1803                 data[i++] = ss->rx_done.lro_mgr.stats.aggregated;
1804                 data[i++] = ss->rx_done.lro_mgr.stats.flushed;
1805                 if (ss->rx_done.lro_mgr.stats.flushed)
1806                         data[i++] = ss->rx_done.lro_mgr.stats.aggregated /
1807                             ss->rx_done.lro_mgr.stats.flushed;
1808                 else
1809                         data[i++] = 0;
1810                 data[i++] = ss->rx_done.lro_mgr.stats.no_desc;
1811         }
1812 }
1813
1814 static void myri10ge_set_msglevel(struct net_device *netdev, u32 value)
1815 {
1816         struct myri10ge_priv *mgp = netdev_priv(netdev);
1817         mgp->msg_enable = value;
1818 }
1819
1820 static u32 myri10ge_get_msglevel(struct net_device *netdev)
1821 {
1822         struct myri10ge_priv *mgp = netdev_priv(netdev);
1823         return mgp->msg_enable;
1824 }
1825
1826 static const struct ethtool_ops myri10ge_ethtool_ops = {
1827         .get_settings = myri10ge_get_settings,
1828         .get_drvinfo = myri10ge_get_drvinfo,
1829         .get_coalesce = myri10ge_get_coalesce,
1830         .set_coalesce = myri10ge_set_coalesce,
1831         .get_pauseparam = myri10ge_get_pauseparam,
1832         .set_pauseparam = myri10ge_set_pauseparam,
1833         .get_ringparam = myri10ge_get_ringparam,
1834         .get_rx_csum = myri10ge_get_rx_csum,
1835         .set_rx_csum = myri10ge_set_rx_csum,
1836         .set_tx_csum = ethtool_op_set_tx_hw_csum,
1837         .set_sg = ethtool_op_set_sg,
1838         .set_tso = myri10ge_set_tso,
1839         .get_link = ethtool_op_get_link,
1840         .get_strings = myri10ge_get_strings,
1841         .get_sset_count = myri10ge_get_sset_count,
1842         .get_ethtool_stats = myri10ge_get_ethtool_stats,
1843         .set_msglevel = myri10ge_set_msglevel,
1844         .get_msglevel = myri10ge_get_msglevel
1845 };
1846
1847 static int myri10ge_allocate_rings(struct myri10ge_slice_state *ss)
1848 {
1849         struct myri10ge_priv *mgp = ss->mgp;
1850         struct myri10ge_cmd cmd;
1851         struct net_device *dev = mgp->dev;
1852         int tx_ring_size, rx_ring_size;
1853         int tx_ring_entries, rx_ring_entries;
1854         int i, slice, status;
1855         size_t bytes;
1856
1857         /* get ring sizes */
1858         slice = ss - mgp->ss;
1859         cmd.data0 = slice;
1860         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0);
1861         tx_ring_size = cmd.data0;
1862         cmd.data0 = slice;
1863         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
1864         if (status != 0)
1865                 return status;
1866         rx_ring_size = cmd.data0;
1867
1868         tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send);
1869         rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr);
1870         ss->tx.mask = tx_ring_entries - 1;
1871         ss->rx_small.mask = ss->rx_big.mask = rx_ring_entries - 1;
1872
1873         status = -ENOMEM;
1874
1875         /* allocate the host shadow rings */
1876
1877         bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4)
1878             * sizeof(*ss->tx.req_list);
1879         ss->tx.req_bytes = kzalloc(bytes, GFP_KERNEL);
1880         if (ss->tx.req_bytes == NULL)
1881                 goto abort_with_nothing;
1882
1883         /* ensure req_list entries are aligned to 8 bytes */
1884         ss->tx.req_list = (struct mcp_kreq_ether_send *)
1885             ALIGN((unsigned long)ss->tx.req_bytes, 8);
1886
1887         bytes = rx_ring_entries * sizeof(*ss->rx_small.shadow);
1888         ss->rx_small.shadow = kzalloc(bytes, GFP_KERNEL);
1889         if (ss->rx_small.shadow == NULL)
1890                 goto abort_with_tx_req_bytes;
1891
1892         bytes = rx_ring_entries * sizeof(*ss->rx_big.shadow);
1893         ss->rx_big.shadow = kzalloc(bytes, GFP_KERNEL);
1894         if (ss->rx_big.shadow == NULL)
1895                 goto abort_with_rx_small_shadow;
1896
1897         /* allocate the host info rings */
1898
1899         bytes = tx_ring_entries * sizeof(*ss->tx.info);
1900         ss->tx.info = kzalloc(bytes, GFP_KERNEL);
1901         if (ss->tx.info == NULL)
1902                 goto abort_with_rx_big_shadow;
1903
1904         bytes = rx_ring_entries * sizeof(*ss->rx_small.info);
1905         ss->rx_small.info = kzalloc(bytes, GFP_KERNEL);
1906         if (ss->rx_small.info == NULL)
1907                 goto abort_with_tx_info;
1908
1909         bytes = rx_ring_entries * sizeof(*ss->rx_big.info);
1910         ss->rx_big.info = kzalloc(bytes, GFP_KERNEL);
1911         if (ss->rx_big.info == NULL)
1912                 goto abort_with_rx_small_info;
1913
1914         /* Fill the receive rings */
1915         ss->rx_big.cnt = 0;
1916         ss->rx_small.cnt = 0;
1917         ss->rx_big.fill_cnt = 0;
1918         ss->rx_small.fill_cnt = 0;
1919         ss->rx_small.page_offset = MYRI10GE_ALLOC_SIZE;
1920         ss->rx_big.page_offset = MYRI10GE_ALLOC_SIZE;
1921         ss->rx_small.watchdog_needed = 0;
1922         ss->rx_big.watchdog_needed = 0;
1923         myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
1924                                 mgp->small_bytes + MXGEFW_PAD, 0);
1925
1926         if (ss->rx_small.fill_cnt < ss->rx_small.mask + 1) {
1927                 printk(KERN_ERR
1928                        "myri10ge: %s:slice-%d: alloced only %d small bufs\n",
1929                        dev->name, slice, ss->rx_small.fill_cnt);
1930                 goto abort_with_rx_small_ring;
1931         }
1932
1933         myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
1934         if (ss->rx_big.fill_cnt < ss->rx_big.mask + 1) {
1935                 printk(KERN_ERR
1936                        "myri10ge: %s:slice-%d: alloced only %d big bufs\n",
1937                        dev->name, slice, ss->rx_big.fill_cnt);
1938                 goto abort_with_rx_big_ring;
1939         }
1940
1941         return 0;
1942
1943 abort_with_rx_big_ring:
1944         for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
1945                 int idx = i & ss->rx_big.mask;
1946                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
1947                                        mgp->big_bytes);
1948                 put_page(ss->rx_big.info[idx].page);
1949         }
1950
1951 abort_with_rx_small_ring:
1952         for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
1953                 int idx = i & ss->rx_small.mask;
1954                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
1955                                        mgp->small_bytes + MXGEFW_PAD);
1956                 put_page(ss->rx_small.info[idx].page);
1957         }
1958
1959         kfree(ss->rx_big.info);
1960
1961 abort_with_rx_small_info:
1962         kfree(ss->rx_small.info);
1963
1964 abort_with_tx_info:
1965         kfree(ss->tx.info);
1966
1967 abort_with_rx_big_shadow:
1968         kfree(ss->rx_big.shadow);
1969
1970 abort_with_rx_small_shadow:
1971         kfree(ss->rx_small.shadow);
1972
1973 abort_with_tx_req_bytes:
1974         kfree(ss->tx.req_bytes);
1975         ss->tx.req_bytes = NULL;
1976         ss->tx.req_list = NULL;
1977
1978 abort_with_nothing:
1979         return status;
1980 }
1981
1982 static void myri10ge_free_rings(struct myri10ge_slice_state *ss)
1983 {
1984         struct myri10ge_priv *mgp = ss->mgp;
1985         struct sk_buff *skb;
1986         struct myri10ge_tx_buf *tx;
1987         int i, len, idx;
1988
1989         /* If not allocated, skip it */
1990         if (ss->tx.req_list == NULL)
1991                 return;
1992
1993         for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
1994                 idx = i & ss->rx_big.mask;
1995                 if (i == ss->rx_big.fill_cnt - 1)
1996                         ss->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE;
1997                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
1998                                        mgp->big_bytes);
1999                 put_page(ss->rx_big.info[idx].page);
2000         }
2001
2002         for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2003                 idx = i & ss->rx_small.mask;
2004                 if (i == ss->rx_small.fill_cnt - 1)
2005                         ss->rx_small.info[idx].page_offset =
2006                             MYRI10GE_ALLOC_SIZE;
2007                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2008                                        mgp->small_bytes + MXGEFW_PAD);
2009                 put_page(ss->rx_small.info[idx].page);
2010         }
2011         tx = &ss->tx;
2012         while (tx->done != tx->req) {
2013                 idx = tx->done & tx->mask;
2014                 skb = tx->info[idx].skb;
2015
2016                 /* Mark as free */
2017                 tx->info[idx].skb = NULL;
2018                 tx->done++;
2019                 len = pci_unmap_len(&tx->info[idx], len);
2020                 pci_unmap_len_set(&tx->info[idx], len, 0);
2021                 if (skb) {
2022                         ss->stats.tx_dropped++;
2023                         dev_kfree_skb_any(skb);
2024                         if (len)
2025                                 pci_unmap_single(mgp->pdev,
2026                                                  pci_unmap_addr(&tx->info[idx],
2027                                                                 bus), len,
2028                                                  PCI_DMA_TODEVICE);
2029                 } else {
2030                         if (len)
2031                                 pci_unmap_page(mgp->pdev,
2032                                                pci_unmap_addr(&tx->info[idx],
2033                                                               bus), len,
2034                                                PCI_DMA_TODEVICE);
2035                 }
2036         }
2037         kfree(ss->rx_big.info);
2038
2039         kfree(ss->rx_small.info);
2040
2041         kfree(ss->tx.info);
2042
2043         kfree(ss->rx_big.shadow);
2044
2045         kfree(ss->rx_small.shadow);
2046
2047         kfree(ss->tx.req_bytes);
2048         ss->tx.req_bytes = NULL;
2049         ss->tx.req_list = NULL;
2050 }
2051
2052 static int myri10ge_request_irq(struct myri10ge_priv *mgp)
2053 {
2054         struct pci_dev *pdev = mgp->pdev;
2055         struct myri10ge_slice_state *ss;
2056         struct net_device *netdev = mgp->dev;
2057         int i;
2058         int status;
2059
2060         mgp->msi_enabled = 0;
2061         mgp->msix_enabled = 0;
2062         status = 0;
2063         if (myri10ge_msi) {
2064                 if (mgp->num_slices > 1) {
2065                         status =
2066                             pci_enable_msix(pdev, mgp->msix_vectors,
2067                                             mgp->num_slices);
2068                         if (status == 0) {
2069                                 mgp->msix_enabled = 1;
2070                         } else {
2071                                 dev_err(&pdev->dev,
2072                                         "Error %d setting up MSI-X\n", status);
2073                                 return status;
2074                         }
2075                 }
2076                 if (mgp->msix_enabled == 0) {
2077                         status = pci_enable_msi(pdev);
2078                         if (status != 0) {
2079                                 dev_err(&pdev->dev,
2080                                         "Error %d setting up MSI; falling back to xPIC\n",
2081                                         status);
2082                         } else {
2083                                 mgp->msi_enabled = 1;
2084                         }
2085                 }
2086         }
2087         if (mgp->msix_enabled) {
2088                 for (i = 0; i < mgp->num_slices; i++) {
2089                         ss = &mgp->ss[i];
2090                         snprintf(ss->irq_desc, sizeof(ss->irq_desc),
2091                                  "%s:slice-%d", netdev->name, i);
2092                         status = request_irq(mgp->msix_vectors[i].vector,
2093                                              myri10ge_intr, 0, ss->irq_desc,
2094                                              ss);
2095                         if (status != 0) {
2096                                 dev_err(&pdev->dev,
2097                                         "slice %d failed to allocate IRQ\n", i);
2098                                 i--;
2099                                 while (i >= 0) {
2100                                         free_irq(mgp->msix_vectors[i].vector,
2101                                                  &mgp->ss[i]);
2102                                         i--;
2103                                 }
2104                                 pci_disable_msix(pdev);
2105                                 return status;
2106                         }
2107                 }
2108         } else {
2109                 status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED,
2110                                      mgp->dev->name, &mgp->ss[0]);
2111                 if (status != 0) {
2112                         dev_err(&pdev->dev, "failed to allocate IRQ\n");
2113                         if (mgp->msi_enabled)
2114                                 pci_disable_msi(pdev);
2115                 }
2116         }
2117         return status;
2118 }
2119
2120 static void myri10ge_free_irq(struct myri10ge_priv *mgp)
2121 {
2122         struct pci_dev *pdev = mgp->pdev;
2123         int i;
2124
2125         if (mgp->msix_enabled) {
2126                 for (i = 0; i < mgp->num_slices; i++)
2127                         free_irq(mgp->msix_vectors[i].vector, &mgp->ss[i]);
2128         } else {
2129                 free_irq(pdev->irq, &mgp->ss[0]);
2130         }
2131         if (mgp->msi_enabled)
2132                 pci_disable_msi(pdev);
2133         if (mgp->msix_enabled)
2134                 pci_disable_msix(pdev);
2135 }
2136
2137 static int
2138 myri10ge_get_frag_header(struct skb_frag_struct *frag, void **mac_hdr,
2139                          void **ip_hdr, void **tcpudp_hdr,
2140                          u64 * hdr_flags, void *priv)
2141 {
2142         struct ethhdr *eh;
2143         struct vlan_ethhdr *veh;
2144         struct iphdr *iph;
2145         u8 *va = page_address(frag->page) + frag->page_offset;
2146         unsigned long ll_hlen;
2147         /* passed opaque through lro_receive_frags() */
2148         __wsum csum = (__force __wsum) (unsigned long)priv;
2149
2150         /* find the mac header, aborting if not IPv4 */
2151
2152         eh = (struct ethhdr *)va;
2153         *mac_hdr = eh;
2154         ll_hlen = ETH_HLEN;
2155         if (eh->h_proto != htons(ETH_P_IP)) {
2156                 if (eh->h_proto == htons(ETH_P_8021Q)) {
2157                         veh = (struct vlan_ethhdr *)va;
2158                         if (veh->h_vlan_encapsulated_proto != htons(ETH_P_IP))
2159                                 return -1;
2160
2161                         ll_hlen += VLAN_HLEN;
2162
2163                         /*
2164                          *  HW checksum starts ETH_HLEN bytes into
2165                          *  frame, so we must subtract off the VLAN
2166                          *  header's checksum before csum can be used
2167                          */
2168                         csum = csum_sub(csum, csum_partial(va + ETH_HLEN,
2169                                                            VLAN_HLEN, 0));
2170                 } else {
2171                         return -1;
2172                 }
2173         }
2174         *hdr_flags = LRO_IPV4;
2175
2176         iph = (struct iphdr *)(va + ll_hlen);
2177         *ip_hdr = iph;
2178         if (iph->protocol != IPPROTO_TCP)
2179                 return -1;
2180         *hdr_flags |= LRO_TCP;
2181         *tcpudp_hdr = (u8 *) (*ip_hdr) + (iph->ihl << 2);
2182
2183         /* verify the IP checksum */
2184         if (unlikely(ip_fast_csum((u8 *) iph, iph->ihl)))
2185                 return -1;
2186
2187         /* verify the  checksum */
2188         if (unlikely(csum_tcpudp_magic(iph->saddr, iph->daddr,
2189                                        ntohs(iph->tot_len) - (iph->ihl << 2),
2190                                        IPPROTO_TCP, csum)))
2191                 return -1;
2192
2193         return 0;
2194 }
2195
2196 static int myri10ge_get_txrx(struct myri10ge_priv *mgp, int slice)
2197 {
2198         struct myri10ge_cmd cmd;
2199         struct myri10ge_slice_state *ss;
2200         int status;
2201
2202         ss = &mgp->ss[slice];
2203         cmd.data0 = 0;          /* single slice for now */
2204         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET, &cmd, 0);
2205         ss->tx.lanai = (struct mcp_kreq_ether_send __iomem *)
2206             (mgp->sram + cmd.data0);
2207
2208         cmd.data0 = slice;
2209         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET,
2210                                     &cmd, 0);
2211         ss->rx_small.lanai = (struct mcp_kreq_ether_recv __iomem *)
2212             (mgp->sram + cmd.data0);
2213
2214         cmd.data0 = slice;
2215         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0);
2216         ss->rx_big.lanai = (struct mcp_kreq_ether_recv __iomem *)
2217             (mgp->sram + cmd.data0);
2218
2219         return status;
2220
2221 }
2222
2223 static int myri10ge_set_stats(struct myri10ge_priv *mgp, int slice)
2224 {
2225         struct myri10ge_cmd cmd;
2226         struct myri10ge_slice_state *ss;
2227         int status;
2228
2229         ss = &mgp->ss[slice];
2230         cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->fw_stats_bus);
2231         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->fw_stats_bus);
2232         cmd.data2 = sizeof(struct mcp_irq_data);
2233         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0);
2234         if (status == -ENOSYS) {
2235                 dma_addr_t bus = ss->fw_stats_bus;
2236                 if (slice != 0)
2237                         return -EINVAL;
2238                 bus += offsetof(struct mcp_irq_data, send_done_count);
2239                 cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus);
2240                 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus);
2241                 status = myri10ge_send_cmd(mgp,
2242                                            MXGEFW_CMD_SET_STATS_DMA_OBSOLETE,
2243                                            &cmd, 0);
2244                 /* Firmware cannot support multicast without STATS_DMA_V2 */
2245                 mgp->fw_multicast_support = 0;
2246         } else {
2247                 mgp->fw_multicast_support = 1;
2248         }
2249         return 0;
2250 }
2251
2252 static int myri10ge_open(struct net_device *dev)
2253 {
2254         struct myri10ge_slice_state *ss;
2255         struct myri10ge_priv *mgp = netdev_priv(dev);
2256         struct myri10ge_cmd cmd;
2257         int i, status, big_pow2, slice;
2258         u8 *itable;
2259         struct net_lro_mgr *lro_mgr;
2260
2261         if (mgp->running != MYRI10GE_ETH_STOPPED)
2262                 return -EBUSY;
2263
2264         mgp->running = MYRI10GE_ETH_STARTING;
2265         status = myri10ge_reset(mgp);
2266         if (status != 0) {
2267                 printk(KERN_ERR "myri10ge: %s: failed reset\n", dev->name);
2268                 goto abort_with_nothing;
2269         }
2270
2271         if (mgp->num_slices > 1) {
2272                 cmd.data0 = mgp->num_slices;
2273                 cmd.data1 = 1;  /* use MSI-X */
2274                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
2275                                            &cmd, 0);
2276                 if (status != 0) {
2277                         printk(KERN_ERR
2278                                "myri10ge: %s: failed to set number of slices\n",
2279                                dev->name);
2280                         goto abort_with_nothing;
2281                 }
2282                 /* setup the indirection table */
2283                 cmd.data0 = mgp->num_slices;
2284                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_TABLE_SIZE,
2285                                            &cmd, 0);
2286
2287                 status |= myri10ge_send_cmd(mgp,
2288                                             MXGEFW_CMD_GET_RSS_TABLE_OFFSET,
2289                                             &cmd, 0);
2290                 if (status != 0) {
2291                         printk(KERN_ERR
2292                                "myri10ge: %s: failed to setup rss tables\n",
2293                                dev->name);
2294                 }
2295
2296                 /* just enable an identity mapping */
2297                 itable = mgp->sram + cmd.data0;
2298                 for (i = 0; i < mgp->num_slices; i++)
2299                         __raw_writeb(i, &itable[i]);
2300
2301                 cmd.data0 = 1;
2302                 cmd.data1 = myri10ge_rss_hash;
2303                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_ENABLE,
2304                                            &cmd, 0);
2305                 if (status != 0) {
2306                         printk(KERN_ERR
2307                                "myri10ge: %s: failed to enable slices\n",
2308                                dev->name);
2309                         goto abort_with_nothing;
2310                 }
2311         }
2312
2313         status = myri10ge_request_irq(mgp);
2314         if (status != 0)
2315                 goto abort_with_nothing;
2316
2317         /* decide what small buffer size to use.  For good TCP rx
2318          * performance, it is important to not receive 1514 byte
2319          * frames into jumbo buffers, as it confuses the socket buffer
2320          * accounting code, leading to drops and erratic performance.
2321          */
2322
2323         if (dev->mtu <= ETH_DATA_LEN)
2324                 /* enough for a TCP header */
2325                 mgp->small_bytes = (128 > SMP_CACHE_BYTES)
2326                     ? (128 - MXGEFW_PAD)
2327                     : (SMP_CACHE_BYTES - MXGEFW_PAD);
2328         else
2329                 /* enough for a vlan encapsulated ETH_DATA_LEN frame */
2330                 mgp->small_bytes = VLAN_ETH_FRAME_LEN;
2331
2332         /* Override the small buffer size? */
2333         if (myri10ge_small_bytes > 0)
2334                 mgp->small_bytes = myri10ge_small_bytes;
2335
2336         /* Firmware needs the big buff size as a power of 2.  Lie and
2337          * tell him the buffer is larger, because we only use 1
2338          * buffer/pkt, and the mtu will prevent overruns.
2339          */
2340         big_pow2 = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2341         if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) {
2342                 while (!is_power_of_2(big_pow2))
2343                         big_pow2++;
2344                 mgp->big_bytes = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2345         } else {
2346                 big_pow2 = MYRI10GE_ALLOC_SIZE;
2347                 mgp->big_bytes = big_pow2;
2348         }
2349
2350         /* setup the per-slice data structures */
2351         for (slice = 0; slice < mgp->num_slices; slice++) {
2352                 ss = &mgp->ss[slice];
2353
2354                 status = myri10ge_get_txrx(mgp, slice);
2355                 if (status != 0) {
2356                         printk(KERN_ERR
2357                                "myri10ge: %s: failed to get ring sizes or locations\n",
2358                                dev->name);
2359                         goto abort_with_rings;
2360                 }
2361                 status = myri10ge_allocate_rings(ss);
2362                 if (status != 0)
2363                         goto abort_with_rings;
2364                 if (slice == 0)
2365                         status = myri10ge_set_stats(mgp, slice);
2366                 if (status) {
2367                         printk(KERN_ERR
2368                                "myri10ge: %s: Couldn't set stats DMA\n",
2369                                dev->name);
2370                         goto abort_with_rings;
2371                 }
2372
2373                 lro_mgr = &ss->rx_done.lro_mgr;
2374                 lro_mgr->dev = dev;
2375                 lro_mgr->features = LRO_F_NAPI;
2376                 lro_mgr->ip_summed = CHECKSUM_COMPLETE;
2377                 lro_mgr->ip_summed_aggr = CHECKSUM_UNNECESSARY;
2378                 lro_mgr->max_desc = MYRI10GE_MAX_LRO_DESCRIPTORS;
2379                 lro_mgr->lro_arr = ss->rx_done.lro_desc;
2380                 lro_mgr->get_frag_header = myri10ge_get_frag_header;
2381                 lro_mgr->max_aggr = myri10ge_lro_max_pkts;
2382                 if (lro_mgr->max_aggr > MAX_SKB_FRAGS)
2383                         lro_mgr->max_aggr = MAX_SKB_FRAGS;
2384
2385                 /* must happen prior to any irq */
2386                 napi_enable(&(ss)->napi);
2387         }
2388
2389         /* now give firmware buffers sizes, and MTU */
2390         cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
2391         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0);
2392         cmd.data0 = mgp->small_bytes;
2393         status |=
2394             myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0);
2395         cmd.data0 = big_pow2;
2396         status |=
2397             myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0);
2398         if (status) {
2399                 printk(KERN_ERR "myri10ge: %s: Couldn't set buffer sizes\n",
2400                        dev->name);
2401                 goto abort_with_rings;
2402         }
2403
2404         /*
2405          * Set Linux style TSO mode; this is needed only on newer
2406          *  firmware versions.  Older versions default to Linux
2407          *  style TSO
2408          */
2409         cmd.data0 = 0;
2410         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_TSO_MODE, &cmd, 0);
2411         if (status && status != -ENOSYS) {
2412                 printk(KERN_ERR "myri10ge: %s: Couldn't set TSO mode\n",
2413                        dev->name);
2414                 goto abort_with_rings;
2415         }
2416
2417         mgp->link_state = ~0U;
2418         mgp->rdma_tags_available = 15;
2419
2420         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0);
2421         if (status) {
2422                 printk(KERN_ERR "myri10ge: %s: Couldn't bring up link\n",
2423                        dev->name);
2424                 goto abort_with_rings;
2425         }
2426
2427         mgp->running = MYRI10GE_ETH_RUNNING;
2428         mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ;
2429         add_timer(&mgp->watchdog_timer);
2430         netif_wake_queue(dev);
2431         return 0;
2432
2433 abort_with_rings:
2434         for (i = 0; i < mgp->num_slices; i++)
2435                 myri10ge_free_rings(&mgp->ss[i]);
2436
2437         myri10ge_free_irq(mgp);
2438
2439 abort_with_nothing:
2440         mgp->running = MYRI10GE_ETH_STOPPED;
2441         return -ENOMEM;
2442 }
2443
2444 static int myri10ge_close(struct net_device *dev)
2445 {
2446         struct myri10ge_priv *mgp = netdev_priv(dev);
2447         struct myri10ge_cmd cmd;
2448         int status, old_down_cnt;
2449         int i;
2450
2451         if (mgp->running != MYRI10GE_ETH_RUNNING)
2452                 return 0;
2453
2454         if (mgp->ss[0].tx.req_bytes == NULL)
2455                 return 0;
2456
2457         del_timer_sync(&mgp->watchdog_timer);
2458         mgp->running = MYRI10GE_ETH_STOPPING;
2459         for (i = 0; i < mgp->num_slices; i++) {
2460                 napi_disable(&mgp->ss[i].napi);
2461         }
2462         netif_carrier_off(dev);
2463         netif_stop_queue(dev);
2464         old_down_cnt = mgp->down_cnt;
2465         mb();
2466         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0);
2467         if (status)
2468                 printk(KERN_ERR "myri10ge: %s: Couldn't bring down link\n",
2469                        dev->name);
2470
2471         wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt, HZ);
2472         if (old_down_cnt == mgp->down_cnt)
2473                 printk(KERN_ERR "myri10ge: %s never got down irq\n", dev->name);
2474
2475         netif_tx_disable(dev);
2476         myri10ge_free_irq(mgp);
2477         for (i = 0; i < mgp->num_slices; i++)
2478                 myri10ge_free_rings(&mgp->ss[i]);
2479
2480         mgp->running = MYRI10GE_ETH_STOPPED;
2481         return 0;
2482 }
2483
2484 /* copy an array of struct mcp_kreq_ether_send's to the mcp.  Copy
2485  * backwards one at a time and handle ring wraps */
2486
2487 static inline void
2488 myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx,
2489                               struct mcp_kreq_ether_send *src, int cnt)
2490 {
2491         int idx, starting_slot;
2492         starting_slot = tx->req;
2493         while (cnt > 1) {
2494                 cnt--;
2495                 idx = (starting_slot + cnt) & tx->mask;
2496                 myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src));
2497                 mb();
2498         }
2499 }
2500
2501 /*
2502  * copy an array of struct mcp_kreq_ether_send's to the mcp.  Copy
2503  * at most 32 bytes at a time, so as to avoid involving the software
2504  * pio handler in the nic.   We re-write the first segment's flags
2505  * to mark them valid only after writing the entire chain.
2506  */
2507
2508 static inline void
2509 myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src,
2510                     int cnt)
2511 {
2512         int idx, i;
2513         struct mcp_kreq_ether_send __iomem *dstp, *dst;
2514         struct mcp_kreq_ether_send *srcp;
2515         u8 last_flags;
2516
2517         idx = tx->req & tx->mask;
2518
2519         last_flags = src->flags;
2520         src->flags = 0;
2521         mb();
2522         dst = dstp = &tx->lanai[idx];
2523         srcp = src;
2524
2525         if ((idx + cnt) < tx->mask) {
2526                 for (i = 0; i < (cnt - 1); i += 2) {
2527                         myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src));
2528                         mb();   /* force write every 32 bytes */
2529                         srcp += 2;
2530                         dstp += 2;
2531                 }
2532         } else {
2533                 /* submit all but the first request, and ensure
2534                  * that it is submitted below */
2535                 myri10ge_submit_req_backwards(tx, src, cnt);
2536                 i = 0;
2537         }
2538         if (i < cnt) {
2539                 /* submit the first request */
2540                 myri10ge_pio_copy(dstp, srcp, sizeof(*src));
2541                 mb();           /* barrier before setting valid flag */
2542         }
2543
2544         /* re-write the last 32-bits with the valid flags */
2545         src->flags = last_flags;
2546         put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3);
2547         tx->req += cnt;
2548         mb();
2549 }
2550
2551 /*
2552  * Transmit a packet.  We need to split the packet so that a single
2553  * segment does not cross myri10ge->tx_boundary, so this makes segment
2554  * counting tricky.  So rather than try to count segments up front, we
2555  * just give up if there are too few segments to hold a reasonably
2556  * fragmented packet currently available.  If we run
2557  * out of segments while preparing a packet for DMA, we just linearize
2558  * it and try again.
2559  */
2560
2561 static int myri10ge_xmit(struct sk_buff *skb, struct net_device *dev)
2562 {
2563         struct myri10ge_priv *mgp = netdev_priv(dev);
2564         struct myri10ge_slice_state *ss;
2565         struct mcp_kreq_ether_send *req;
2566         struct myri10ge_tx_buf *tx;
2567         struct skb_frag_struct *frag;
2568         dma_addr_t bus;
2569         u32 low;
2570         __be32 high_swapped;
2571         unsigned int len;
2572         int idx, last_idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
2573         u16 pseudo_hdr_offset, cksum_offset;
2574         int cum_len, seglen, boundary, rdma_count;
2575         u8 flags, odd_flag;
2576
2577         /* always transmit through slot 0 */
2578         ss = mgp->ss;
2579         tx = &ss->tx;
2580 again:
2581         req = tx->req_list;
2582         avail = tx->mask - 1 - (tx->req - tx->done);
2583
2584         mss = 0;
2585         max_segments = MXGEFW_MAX_SEND_DESC;
2586
2587         if (skb_is_gso(skb)) {
2588                 mss = skb_shinfo(skb)->gso_size;
2589                 max_segments = MYRI10GE_MAX_SEND_DESC_TSO;
2590         }
2591
2592         if ((unlikely(avail < max_segments))) {
2593                 /* we are out of transmit resources */
2594                 tx->stop_queue++;
2595                 netif_stop_queue(dev);
2596                 return 1;
2597         }
2598
2599         /* Setup checksum offloading, if needed */
2600         cksum_offset = 0;
2601         pseudo_hdr_offset = 0;
2602         odd_flag = 0;
2603         flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
2604         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2605                 cksum_offset = skb_transport_offset(skb);
2606                 pseudo_hdr_offset = cksum_offset + skb->csum_offset;
2607                 /* If the headers are excessively large, then we must
2608                  * fall back to a software checksum */
2609                 if (unlikely(!mss && (cksum_offset > 255 ||
2610                                       pseudo_hdr_offset > 127))) {
2611                         if (skb_checksum_help(skb))
2612                                 goto drop;
2613                         cksum_offset = 0;
2614                         pseudo_hdr_offset = 0;
2615                 } else {
2616                         odd_flag = MXGEFW_FLAGS_ALIGN_ODD;
2617                         flags |= MXGEFW_FLAGS_CKSUM;
2618                 }
2619         }
2620
2621         cum_len = 0;
2622
2623         if (mss) {              /* TSO */
2624                 /* this removes any CKSUM flag from before */
2625                 flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST);
2626
2627                 /* negative cum_len signifies to the
2628                  * send loop that we are still in the
2629                  * header portion of the TSO packet.
2630                  * TSO header can be at most 1KB long */
2631                 cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb));
2632
2633                 /* for IPv6 TSO, the checksum offset stores the
2634                  * TCP header length, to save the firmware from
2635                  * the need to parse the headers */
2636                 if (skb_is_gso_v6(skb)) {
2637                         cksum_offset = tcp_hdrlen(skb);
2638                         /* Can only handle headers <= max_tso6 long */
2639                         if (unlikely(-cum_len > mgp->max_tso6))
2640                                 return myri10ge_sw_tso(skb, dev);
2641                 }
2642                 /* for TSO, pseudo_hdr_offset holds mss.
2643                  * The firmware figures out where to put
2644                  * the checksum by parsing the header. */
2645                 pseudo_hdr_offset = mss;
2646         } else
2647                 /* Mark small packets, and pad out tiny packets */
2648         if (skb->len <= MXGEFW_SEND_SMALL_SIZE) {
2649                 flags |= MXGEFW_FLAGS_SMALL;
2650
2651                 /* pad frames to at least ETH_ZLEN bytes */
2652                 if (unlikely(skb->len < ETH_ZLEN)) {
2653                         if (skb_padto(skb, ETH_ZLEN)) {
2654                                 /* The packet is gone, so we must
2655                                  * return 0 */
2656                                 ss->stats.tx_dropped += 1;
2657                                 return 0;
2658                         }
2659                         /* adjust the len to account for the zero pad
2660                          * so that the nic can know how long it is */
2661                         skb->len = ETH_ZLEN;
2662                 }
2663         }
2664
2665         /* map the skb for DMA */
2666         len = skb->len - skb->data_len;
2667         idx = tx->req & tx->mask;
2668         tx->info[idx].skb = skb;
2669         bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE);
2670         pci_unmap_addr_set(&tx->info[idx], bus, bus);
2671         pci_unmap_len_set(&tx->info[idx], len, len);
2672
2673         frag_cnt = skb_shinfo(skb)->nr_frags;
2674         frag_idx = 0;
2675         count = 0;
2676         rdma_count = 0;
2677
2678         /* "rdma_count" is the number of RDMAs belonging to the
2679          * current packet BEFORE the current send request. For
2680          * non-TSO packets, this is equal to "count".
2681          * For TSO packets, rdma_count needs to be reset
2682          * to 0 after a segment cut.
2683          *
2684          * The rdma_count field of the send request is
2685          * the number of RDMAs of the packet starting at
2686          * that request. For TSO send requests with one ore more cuts
2687          * in the middle, this is the number of RDMAs starting
2688          * after the last cut in the request. All previous
2689          * segments before the last cut implicitly have 1 RDMA.
2690          *
2691          * Since the number of RDMAs is not known beforehand,
2692          * it must be filled-in retroactively - after each
2693          * segmentation cut or at the end of the entire packet.
2694          */
2695
2696         while (1) {
2697                 /* Break the SKB or Fragment up into pieces which
2698                  * do not cross mgp->tx_boundary */
2699                 low = MYRI10GE_LOWPART_TO_U32(bus);
2700                 high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
2701                 while (len) {
2702                         u8 flags_next;
2703                         int cum_len_next;
2704
2705                         if (unlikely(count == max_segments))
2706                                 goto abort_linearize;
2707
2708                         boundary =
2709                             (low + mgp->tx_boundary) & ~(mgp->tx_boundary - 1);
2710                         seglen = boundary - low;
2711                         if (seglen > len)
2712                                 seglen = len;
2713                         flags_next = flags & ~MXGEFW_FLAGS_FIRST;
2714                         cum_len_next = cum_len + seglen;
2715                         if (mss) {      /* TSO */
2716                                 (req - rdma_count)->rdma_count = rdma_count + 1;
2717
2718                                 if (likely(cum_len >= 0)) {     /* payload */
2719                                         int next_is_first, chop;
2720
2721                                         chop = (cum_len_next > mss);
2722                                         cum_len_next = cum_len_next % mss;
2723                                         next_is_first = (cum_len_next == 0);
2724                                         flags |= chop * MXGEFW_FLAGS_TSO_CHOP;
2725                                         flags_next |= next_is_first *
2726                                             MXGEFW_FLAGS_FIRST;
2727                                         rdma_count |= -(chop | next_is_first);
2728                                         rdma_count += chop & !next_is_first;
2729                                 } else if (likely(cum_len_next >= 0)) { /* header ends */
2730                                         int small;
2731
2732                                         rdma_count = -1;
2733                                         cum_len_next = 0;
2734                                         seglen = -cum_len;
2735                                         small = (mss <= MXGEFW_SEND_SMALL_SIZE);
2736                                         flags_next = MXGEFW_FLAGS_TSO_PLD |
2737                                             MXGEFW_FLAGS_FIRST |
2738                                             (small * MXGEFW_FLAGS_SMALL);
2739                                 }
2740                         }
2741                         req->addr_high = high_swapped;
2742                         req->addr_low = htonl(low);
2743                         req->pseudo_hdr_offset = htons(pseudo_hdr_offset);
2744                         req->pad = 0;   /* complete solid 16-byte block; does this matter? */
2745                         req->rdma_count = 1;
2746                         req->length = htons(seglen);
2747                         req->cksum_offset = cksum_offset;
2748                         req->flags = flags | ((cum_len & 1) * odd_flag);
2749
2750                         low += seglen;
2751                         len -= seglen;
2752                         cum_len = cum_len_next;
2753                         flags = flags_next;
2754                         req++;
2755                         count++;
2756                         rdma_count++;
2757                         if (cksum_offset != 0 && !(mss && skb_is_gso_v6(skb))) {
2758                                 if (unlikely(cksum_offset > seglen))
2759                                         cksum_offset -= seglen;
2760                                 else
2761                                         cksum_offset = 0;
2762                         }
2763                 }
2764                 if (frag_idx == frag_cnt)
2765                         break;
2766
2767                 /* map next fragment for DMA */
2768                 idx = (count + tx->req) & tx->mask;
2769                 frag = &skb_shinfo(skb)->frags[frag_idx];
2770                 frag_idx++;
2771                 len = frag->size;
2772                 bus = pci_map_page(mgp->pdev, frag->page, frag->page_offset,
2773                                    len, PCI_DMA_TODEVICE);
2774                 pci_unmap_addr_set(&tx->info[idx], bus, bus);
2775                 pci_unmap_len_set(&tx->info[idx], len, len);
2776         }
2777
2778         (req - rdma_count)->rdma_count = rdma_count;
2779         if (mss)
2780                 do {
2781                         req--;
2782                         req->flags |= MXGEFW_FLAGS_TSO_LAST;
2783                 } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP |
2784                                          MXGEFW_FLAGS_FIRST)));
2785         idx = ((count - 1) + tx->req) & tx->mask;
2786         tx->info[idx].last = 1;
2787         myri10ge_submit_req(tx, tx->req_list, count);
2788         tx->pkt_start++;
2789         if ((avail - count) < MXGEFW_MAX_SEND_DESC) {
2790                 tx->stop_queue++;
2791                 netif_stop_queue(dev);
2792         }
2793         dev->trans_start = jiffies;
2794         return 0;
2795
2796 abort_linearize:
2797         /* Free any DMA resources we've alloced and clear out the skb
2798          * slot so as to not trip up assertions, and to avoid a
2799          * double-free if linearizing fails */
2800
2801         last_idx = (idx + 1) & tx->mask;
2802         idx = tx->req & tx->mask;
2803         tx->info[idx].skb = NULL;
2804         do {
2805                 len = pci_unmap_len(&tx->info[idx], len);
2806                 if (len) {
2807                         if (tx->info[idx].skb != NULL)
2808                                 pci_unmap_single(mgp->pdev,
2809                                                  pci_unmap_addr(&tx->info[idx],
2810                                                                 bus), len,
2811                                                  PCI_DMA_TODEVICE);
2812                         else
2813                                 pci_unmap_page(mgp->pdev,
2814                                                pci_unmap_addr(&tx->info[idx],
2815                                                               bus), len,
2816                                                PCI_DMA_TODEVICE);
2817                         pci_unmap_len_set(&tx->info[idx], len, 0);
2818                         tx->info[idx].skb = NULL;
2819                 }
2820                 idx = (idx + 1) & tx->mask;
2821         } while (idx != last_idx);
2822         if (skb_is_gso(skb)) {
2823                 printk(KERN_ERR
2824                        "myri10ge: %s: TSO but wanted to linearize?!?!?\n",
2825                        mgp->dev->name);
2826                 goto drop;
2827         }
2828
2829         if (skb_linearize(skb))
2830                 goto drop;
2831
2832         tx->linearized++;
2833         goto again;
2834
2835 drop:
2836         dev_kfree_skb_any(skb);
2837         ss->stats.tx_dropped += 1;
2838         return 0;
2839
2840 }
2841
2842 static int myri10ge_sw_tso(struct sk_buff *skb, struct net_device *dev)
2843 {
2844         struct sk_buff *segs, *curr;
2845         struct myri10ge_priv *mgp = netdev_priv(dev);
2846         int status;
2847
2848         segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO6);
2849         if (IS_ERR(segs))
2850                 goto drop;
2851
2852         while (segs) {
2853                 curr = segs;
2854                 segs = segs->next;
2855                 curr->next = NULL;
2856                 status = myri10ge_xmit(curr, dev);
2857                 if (status != 0) {
2858                         dev_kfree_skb_any(curr);
2859                         if (segs != NULL) {
2860                                 curr = segs;
2861                                 segs = segs->next;
2862                                 curr->next = NULL;
2863                                 dev_kfree_skb_any(segs);
2864                         }
2865                         goto drop;
2866                 }
2867         }
2868         dev_kfree_skb_any(skb);
2869         return 0;
2870
2871 drop:
2872         dev_kfree_skb_any(skb);
2873         mgp->stats.tx_dropped += 1;
2874         return 0;
2875 }
2876
2877 static struct net_device_stats *myri10ge_get_stats(struct net_device *dev)
2878 {
2879         struct myri10ge_priv *mgp = netdev_priv(dev);
2880         struct myri10ge_slice_netstats *slice_stats;
2881         struct net_device_stats *stats = &mgp->stats;
2882         int i;
2883
2884         memset(stats, 0, sizeof(*stats));
2885         for (i = 0; i < mgp->num_slices; i++) {
2886                 slice_stats = &mgp->ss[i].stats;
2887                 stats->rx_packets += slice_stats->rx_packets;
2888                 stats->tx_packets += slice_stats->tx_packets;
2889                 stats->rx_bytes += slice_stats->rx_bytes;
2890                 stats->tx_bytes += slice_stats->tx_bytes;
2891                 stats->rx_dropped += slice_stats->rx_dropped;
2892                 stats->tx_dropped += slice_stats->tx_dropped;
2893         }
2894         return stats;
2895 }
2896
2897 static void myri10ge_set_multicast_list(struct net_device *dev)
2898 {
2899         struct myri10ge_priv *mgp = netdev_priv(dev);
2900         struct myri10ge_cmd cmd;
2901         struct dev_mc_list *mc_list;
2902         __be32 data[2] = { 0, 0 };
2903         int err;
2904         DECLARE_MAC_BUF(mac);
2905
2906         /* can be called from atomic contexts,
2907          * pass 1 to force atomicity in myri10ge_send_cmd() */
2908         myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1);
2909
2910         /* This firmware is known to not support multicast */
2911         if (!mgp->fw_multicast_support)
2912                 return;
2913
2914         /* Disable multicast filtering */
2915
2916         err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1);
2917         if (err != 0) {
2918                 printk(KERN_ERR "myri10ge: %s: Failed MXGEFW_ENABLE_ALLMULTI,"
2919                        " error status: %d\n", dev->name, err);
2920                 goto abort;
2921         }
2922
2923         if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) {
2924                 /* request to disable multicast filtering, so quit here */
2925                 return;
2926         }
2927
2928         /* Flush the filters */
2929
2930         err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS,
2931                                 &cmd, 1);
2932         if (err != 0) {
2933                 printk(KERN_ERR
2934                        "myri10ge: %s: Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS"
2935                        ", error status: %d\n", dev->name, err);
2936                 goto abort;
2937         }
2938
2939         /* Walk the multicast list, and add each address */
2940         for (mc_list = dev->mc_list; mc_list != NULL; mc_list = mc_list->next) {
2941                 memcpy(data, &mc_list->dmi_addr, 6);
2942                 cmd.data0 = ntohl(data[0]);
2943                 cmd.data1 = ntohl(data[1]);
2944                 err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP,
2945                                         &cmd, 1);
2946
2947                 if (err != 0) {
2948                         printk(KERN_ERR "myri10ge: %s: Failed "
2949                                "MXGEFW_JOIN_MULTICAST_GROUP, error status:"
2950                                "%d\t", dev->name, err);
2951                         printk(KERN_ERR "MAC %s\n",
2952                                print_mac(mac, mc_list->dmi_addr));
2953                         goto abort;
2954                 }
2955         }
2956         /* Enable multicast filtering */
2957         err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1);
2958         if (err != 0) {
2959                 printk(KERN_ERR "myri10ge: %s: Failed MXGEFW_DISABLE_ALLMULTI,"
2960                        "error status: %d\n", dev->name, err);
2961                 goto abort;
2962         }
2963
2964         return;
2965
2966 abort:
2967         return;
2968 }
2969
2970 static int myri10ge_set_mac_address(struct net_device *dev, void *addr)
2971 {
2972         struct sockaddr *sa = addr;
2973         struct myri10ge_priv *mgp = netdev_priv(dev);
2974         int status;
2975
2976         if (!is_valid_ether_addr(sa->sa_data))
2977                 return -EADDRNOTAVAIL;
2978
2979         status = myri10ge_update_mac_address(mgp, sa->sa_data);
2980         if (status != 0) {
2981                 printk(KERN_ERR
2982                        "myri10ge: %s: changing mac address failed with %d\n",
2983                        dev->name, status);
2984                 return status;
2985         }
2986
2987         /* change the dev structure */
2988         memcpy(dev->dev_addr, sa->sa_data, 6);
2989         return 0;
2990 }
2991
2992 static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
2993 {
2994         struct myri10ge_priv *mgp = netdev_priv(dev);
2995         int error = 0;
2996
2997         if ((new_mtu < 68) || (ETH_HLEN + new_mtu > MYRI10GE_MAX_ETHER_MTU)) {
2998                 printk(KERN_ERR "myri10ge: %s: new mtu (%d) is not valid\n",
2999                        dev->name, new_mtu);
3000                 return -EINVAL;
3001         }
3002         printk(KERN_INFO "%s: changing mtu from %d to %d\n",
3003                dev->name, dev->mtu, new_mtu);
3004         if (mgp->running) {
3005                 /* if we change the mtu on an active device, we must
3006                  * reset the device so the firmware sees the change */
3007                 myri10ge_close(dev);
3008                 dev->mtu = new_mtu;
3009                 myri10ge_open(dev);
3010         } else
3011                 dev->mtu = new_mtu;
3012
3013         return error;
3014 }
3015
3016 /*
3017  * Enable ECRC to align PCI-E Completion packets on an 8-byte boundary.
3018  * Only do it if the bridge is a root port since we don't want to disturb
3019  * any other device, except if forced with myri10ge_ecrc_enable > 1.
3020  */
3021
3022 static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
3023 {
3024         struct pci_dev *bridge = mgp->pdev->bus->self;
3025         struct device *dev = &mgp->pdev->dev;
3026         unsigned cap;
3027         unsigned err_cap;
3028         u16 val;
3029         u8 ext_type;
3030         int ret;
3031
3032         if (!myri10ge_ecrc_enable || !bridge)
3033                 return;
3034
3035         /* check that the bridge is a root port */
3036         cap = pci_find_capability(bridge, PCI_CAP_ID_EXP);
3037         pci_read_config_word(bridge, cap + PCI_CAP_FLAGS, &val);
3038         ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
3039         if (ext_type != PCI_EXP_TYPE_ROOT_PORT) {
3040                 if (myri10ge_ecrc_enable > 1) {
3041                         struct pci_dev *prev_bridge, *old_bridge = bridge;
3042
3043                         /* Walk the hierarchy up to the root port
3044                          * where ECRC has to be enabled */
3045                         do {
3046                                 prev_bridge = bridge;
3047                                 bridge = bridge->bus->self;
3048                                 if (!bridge || prev_bridge == bridge) {
3049                                         dev_err(dev,
3050                                                 "Failed to find root port"
3051                                                 " to force ECRC\n");
3052                                         return;
3053                                 }
3054                                 cap =
3055                                     pci_find_capability(bridge, PCI_CAP_ID_EXP);
3056                                 pci_read_config_word(bridge,
3057                                                      cap + PCI_CAP_FLAGS, &val);
3058                                 ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
3059                         } while (ext_type != PCI_EXP_TYPE_ROOT_PORT);
3060
3061                         dev_info(dev,
3062                                  "Forcing ECRC on non-root port %s"
3063                                  " (enabling on root port %s)\n",
3064                                  pci_name(old_bridge), pci_name(bridge));
3065                 } else {
3066                         dev_err(dev,
3067                                 "Not enabling ECRC on non-root port %s\n",
3068                                 pci_name(bridge));
3069                         return;
3070                 }
3071         }
3072
3073         cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
3074         if (!cap)
3075                 return;
3076
3077         ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap);
3078         if (ret) {
3079                 dev_err(dev, "failed reading ext-conf-space of %s\n",
3080                         pci_name(bridge));
3081                 dev_err(dev, "\t pci=nommconf in use? "
3082                         "or buggy/incomplete/absent ACPI MCFG attr?\n");
3083                 return;
3084         }
3085         if (!(err_cap & PCI_ERR_CAP_ECRC_GENC))
3086                 return;
3087
3088         err_cap |= PCI_ERR_CAP_ECRC_GENE;
3089         pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap);
3090         dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge));
3091 }
3092
3093 /*
3094  * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput
3095  * when the PCI-E Completion packets are aligned on an 8-byte
3096  * boundary.  Some PCI-E chip sets always align Completion packets; on
3097  * the ones that do not, the alignment can be enforced by enabling
3098  * ECRC generation (if supported).
3099  *
3100  * When PCI-E Completion packets are not aligned, it is actually more
3101  * efficient to limit Read-DMA transactions to 2KB, rather than 4KB.
3102  *
3103  * If the driver can neither enable ECRC nor verify that it has
3104  * already been enabled, then it must use a firmware image which works
3105  * around unaligned completion packets (myri10ge_rss_ethp_z8e.dat), and it
3106  * should also ensure that it never gives the device a Read-DMA which is
3107  * larger than 2KB by setting the tx_boundary to 2KB.  If ECRC is
3108  * enabled, then the driver should use the aligned (myri10ge_rss_eth_z8e.dat)
3109  * firmware image, and set tx_boundary to 4KB.
3110  */
3111
3112 static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
3113 {
3114         struct pci_dev *pdev = mgp->pdev;
3115         struct device *dev = &pdev->dev;
3116         int status;
3117
3118         mgp->tx_boundary = 4096;
3119         /*
3120          * Verify the max read request size was set to 4KB
3121          * before trying the test with 4KB.
3122          */
3123         status = pcie_get_readrq(pdev);
3124         if (status < 0) {
3125                 dev_err(dev, "Couldn't read max read req size: %d\n", status);
3126                 goto abort;
3127         }
3128         if (status != 4096) {
3129                 dev_warn(dev, "Max Read Request size != 4096 (%d)\n", status);
3130                 mgp->tx_boundary = 2048;
3131         }
3132         /*
3133          * load the optimized firmware (which assumes aligned PCIe
3134          * completions) in order to see if it works on this host.
3135          */
3136         mgp->fw_name = myri10ge_fw_aligned;
3137         status = myri10ge_load_firmware(mgp, 1);
3138         if (status != 0) {
3139                 goto abort;
3140         }
3141
3142         /*
3143          * Enable ECRC if possible
3144          */
3145         myri10ge_enable_ecrc(mgp);
3146
3147         /*
3148          * Run a DMA test which watches for unaligned completions and
3149          * aborts on the first one seen.
3150          */
3151
3152         status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST);
3153         if (status == 0)
3154                 return;         /* keep the aligned firmware */
3155
3156         if (status != -E2BIG)
3157                 dev_warn(dev, "DMA test failed: %d\n", status);
3158         if (status == -ENOSYS)
3159                 dev_warn(dev, "Falling back to ethp! "
3160                          "Please install up to date fw\n");
3161 abort:
3162         /* fall back to using the unaligned firmware */
3163         mgp->tx_boundary = 2048;
3164         mgp->fw_name = myri10ge_fw_unaligned;
3165
3166 }
3167
3168 static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
3169 {
3170         if (myri10ge_force_firmware == 0) {
3171                 int link_width, exp_cap;
3172                 u16 lnk;
3173
3174                 exp_cap = pci_find_capability(mgp->pdev, PCI_CAP_ID_EXP);
3175                 pci_read_config_word(mgp->pdev, exp_cap + PCI_EXP_LNKSTA, &lnk);
3176                 link_width = (lnk >> 4) & 0x3f;
3177
3178                 /* Check to see if Link is less than 8 or if the
3179                  * upstream bridge is known to provide aligned
3180                  * completions */
3181                 if (link_width < 8) {
3182                         dev_info(&mgp->pdev->dev, "PCIE x%d Link\n",
3183                                  link_width);
3184                         mgp->tx_boundary = 4096;
3185                         mgp->fw_name = myri10ge_fw_aligned;
3186                 } else {
3187                         myri10ge_firmware_probe(mgp);
3188                 }
3189         } else {
3190                 if (myri10ge_force_firmware == 1) {
3191                         dev_info(&mgp->pdev->dev,
3192                                  "Assuming aligned completions (forced)\n");
3193                         mgp->tx_boundary = 4096;
3194                         mgp->fw_name = myri10ge_fw_aligned;
3195                 } else {
3196                         dev_info(&mgp->pdev->dev,
3197                                  "Assuming unaligned completions (forced)\n");
3198                         mgp->tx_boundary = 2048;
3199                         mgp->fw_name = myri10ge_fw_unaligned;
3200                 }
3201         }
3202         if (myri10ge_fw_name != NULL) {
3203                 dev_info(&mgp->pdev->dev, "overriding firmware to %s\n",
3204                          myri10ge_fw_name);
3205                 mgp->fw_name = myri10ge_fw_name;
3206         }
3207 }
3208
3209 #ifdef CONFIG_PM
3210 static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state)
3211 {
3212         struct myri10ge_priv *mgp;
3213         struct net_device *netdev;
3214
3215         mgp = pci_get_drvdata(pdev);
3216         if (mgp == NULL)
3217                 return -EINVAL;
3218         netdev = mgp->dev;
3219
3220         netif_device_detach(netdev);
3221         if (netif_running(netdev)) {
3222                 printk(KERN_INFO "myri10ge: closing %s\n", netdev->name);
3223                 rtnl_lock();
3224                 myri10ge_close(netdev);
3225                 rtnl_unlock();
3226         }
3227         myri10ge_dummy_rdma(mgp, 0);
3228         pci_save_state(pdev);
3229         pci_disable_device(pdev);
3230
3231         return pci_set_power_state(pdev, pci_choose_state(pdev, state));
3232 }
3233
3234 static int myri10ge_resume(struct pci_dev *pdev)
3235 {
3236         struct myri10ge_priv *mgp;
3237         struct net_device *netdev;
3238         int status;
3239         u16 vendor;
3240
3241         mgp = pci_get_drvdata(pdev);
3242         if (mgp == NULL)
3243                 return -EINVAL;
3244         netdev = mgp->dev;
3245         pci_set_power_state(pdev, 0);   /* zeros conf space as a side effect */
3246         msleep(5);              /* give card time to respond */
3247         pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3248         if (vendor == 0xffff) {
3249                 printk(KERN_ERR "myri10ge: %s: device disappeared!\n",
3250                        mgp->dev->name);
3251                 return -EIO;
3252         }
3253
3254         status = pci_restore_state(pdev);
3255         if (status)
3256                 return status;
3257
3258         status = pci_enable_device(pdev);
3259         if (status) {
3260                 dev_err(&pdev->dev, "failed to enable device\n");
3261                 return status;
3262         }
3263
3264         pci_set_master(pdev);
3265
3266         myri10ge_reset(mgp);
3267         myri10ge_dummy_rdma(mgp, 1);
3268
3269         /* Save configuration space to be restored if the
3270          * nic resets due to a parity error */
3271         pci_save_state(pdev);
3272
3273         if (netif_running(netdev)) {
3274                 rtnl_lock();
3275                 status = myri10ge_open(netdev);
3276                 rtnl_unlock();
3277                 if (status != 0)
3278                         goto abort_with_enabled;
3279
3280         }
3281         netif_device_attach(netdev);
3282
3283         return 0;
3284
3285 abort_with_enabled:
3286         pci_disable_device(pdev);
3287         return -EIO;
3288
3289 }
3290 #endif                          /* CONFIG_PM */
3291
3292 static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp)
3293 {
3294         struct pci_dev *pdev = mgp->pdev;
3295         int vs = mgp->vendor_specific_offset;
3296         u32 reboot;
3297
3298         /*enter read32 mode */
3299         pci_write_config_byte(pdev, vs + 0x10, 0x3);
3300
3301         /*read REBOOT_STATUS (0xfffffff0) */
3302         pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0);
3303         pci_read_config_dword(pdev, vs + 0x14, &reboot);
3304         return reboot;
3305 }
3306
3307 /*
3308  * This watchdog is used to check whether the board has suffered
3309  * from a parity error and needs to be recovered.
3310  */
3311 static void myri10ge_watchdog(struct work_struct *work)
3312 {
3313         struct myri10ge_priv *mgp =
3314             container_of(work, struct myri10ge_priv, watchdog_work);
3315         struct myri10ge_tx_buf *tx;
3316         u32 reboot;
3317         int status;
3318         int i;
3319         u16 cmd, vendor;
3320
3321         mgp->watchdog_resets++;
3322         pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3323         if ((cmd & PCI_COMMAND_MASTER) == 0) {
3324                 /* Bus master DMA disabled?  Check to see
3325                  * if the card rebooted due to a parity error
3326                  * For now, just report it */
3327                 reboot = myri10ge_read_reboot(mgp);
3328                 printk(KERN_ERR
3329                        "myri10ge: %s: NIC rebooted (0x%x),%s resetting\n",
3330                        mgp->dev->name, reboot,
3331                        myri10ge_reset_recover ? " " : " not");
3332                 if (myri10ge_reset_recover == 0)
3333                         return;
3334
3335                 myri10ge_reset_recover--;
3336
3337                 /*
3338                  * A rebooted nic will come back with config space as
3339                  * it was after power was applied to PCIe bus.
3340                  * Attempt to restore config space which was saved
3341                  * when the driver was loaded, or the last time the
3342                  * nic was resumed from power saving mode.
3343                  */
3344                 pci_restore_state(mgp->pdev);
3345
3346                 /* save state again for accounting reasons */
3347                 pci_save_state(mgp->pdev);
3348
3349         } else {
3350                 /* if we get back -1's from our slot, perhaps somebody
3351                  * powered off our card.  Don't try to reset it in
3352                  * this case */
3353                 if (cmd == 0xffff) {
3354                         pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3355                         if (vendor == 0xffff) {
3356                                 printk(KERN_ERR
3357                                        "myri10ge: %s: device disappeared!\n",
3358                                        mgp->dev->name);
3359                                 return;
3360                         }
3361                 }
3362                 /* Perhaps it is a software error.  Try to reset */
3363
3364                 printk(KERN_ERR "myri10ge: %s: device timeout, resetting\n",
3365                        mgp->dev->name);
3366                 for (i = 0; i < mgp->num_slices; i++) {
3367                         tx = &mgp->ss[i].tx;
3368                         printk(KERN_INFO
3369                                "myri10ge: %s: (%d): %d %d %d %d %d\n",
3370                                mgp->dev->name, i, tx->req, tx->done,
3371                                tx->pkt_start, tx->pkt_done,
3372                                (int)ntohl(mgp->ss[i].fw_stats->
3373                                           send_done_count));
3374                         msleep(2000);
3375                         printk(KERN_INFO
3376                                "myri10ge: %s: (%d): %d %d %d %d %d\n",
3377                                mgp->dev->name, i, tx->req, tx->done,
3378                                tx->pkt_start, tx->pkt_done,
3379                                (int)ntohl(mgp->ss[i].fw_stats->
3380                                           send_done_count));
3381                 }
3382         }
3383         rtnl_lock();
3384         myri10ge_close(mgp->dev);
3385         status = myri10ge_load_firmware(mgp, 1);
3386         if (status != 0)
3387                 printk(KERN_ERR "myri10ge: %s: failed to load firmware\n",
3388                        mgp->dev->name);
3389         else
3390                 myri10ge_open(mgp->dev);
3391         rtnl_unlock();
3392 }
3393
3394 /*
3395  * We use our own timer routine rather than relying upon
3396  * netdev->tx_timeout because we have a very large hardware transmit
3397  * queue.  Due to the large queue, the netdev->tx_timeout function
3398  * cannot detect a NIC with a parity error in a timely fashion if the
3399  * NIC is lightly loaded.
3400  */
3401 static void myri10ge_watchdog_timer(unsigned long arg)
3402 {
3403         struct myri10ge_priv *mgp;
3404         struct myri10ge_slice_state *ss;
3405         int i, reset_needed;
3406         u32 rx_pause_cnt;
3407
3408         mgp = (struct myri10ge_priv *)arg;
3409
3410         rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3411         for (i = 0, reset_needed = 0;
3412              i < mgp->num_slices && reset_needed == 0; ++i) {
3413
3414                 ss = &mgp->ss[i];
3415                 if (ss->rx_small.watchdog_needed) {
3416                         myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
3417                                                 mgp->small_bytes + MXGEFW_PAD,
3418                                                 1);
3419                         if (ss->rx_small.fill_cnt - ss->rx_small.cnt >=
3420                             myri10ge_fill_thresh)
3421                                 ss->rx_small.watchdog_needed = 0;
3422                 }
3423                 if (ss->rx_big.watchdog_needed) {
3424                         myri10ge_alloc_rx_pages(mgp, &ss->rx_big,
3425                                                 mgp->big_bytes, 1);
3426                         if (ss->rx_big.fill_cnt - ss->rx_big.cnt >=
3427                             myri10ge_fill_thresh)
3428                                 ss->rx_big.watchdog_needed = 0;
3429                 }
3430
3431                 if (ss->tx.req != ss->tx.done &&
3432                     ss->tx.done == ss->watchdog_tx_done &&
3433                     ss->watchdog_tx_req != ss->watchdog_tx_done) {
3434                         /* nic seems like it might be stuck.. */
3435                         if (rx_pause_cnt != mgp->watchdog_pause) {
3436                                 if (net_ratelimit())
3437                                         printk(KERN_WARNING "myri10ge %s:"
3438                                                "TX paused, check link partner\n",
3439                                                mgp->dev->name);
3440                         } else {
3441                                 reset_needed = 1;
3442                         }
3443                 }
3444                 ss->watchdog_tx_done = ss->tx.done;
3445                 ss->watchdog_tx_req = ss->tx.req;
3446         }
3447         mgp->watchdog_pause = rx_pause_cnt;
3448
3449         if (reset_needed) {
3450                 schedule_work(&mgp->watchdog_work);
3451         } else {
3452                 /* rearm timer */
3453                 mod_timer(&mgp->watchdog_timer,
3454                           jiffies + myri10ge_watchdog_timeout * HZ);
3455         }
3456 }
3457
3458 static void myri10ge_free_slices(struct myri10ge_priv *mgp)
3459 {
3460         struct myri10ge_slice_state *ss;
3461         struct pci_dev *pdev = mgp->pdev;
3462         size_t bytes;
3463         int i;
3464
3465         if (mgp->ss == NULL)
3466                 return;
3467
3468         for (i = 0; i < mgp->num_slices; i++) {
3469                 ss = &mgp->ss[i];
3470                 if (ss->rx_done.entry != NULL) {
3471                         bytes = mgp->max_intr_slots *
3472                             sizeof(*ss->rx_done.entry);
3473                         dma_free_coherent(&pdev->dev, bytes,
3474                                           ss->rx_done.entry, ss->rx_done.bus);
3475                         ss->rx_done.entry = NULL;
3476                 }
3477                 if (ss->fw_stats != NULL) {
3478                         bytes = sizeof(*ss->fw_stats);
3479                         dma_free_coherent(&pdev->dev, bytes,
3480                                           ss->fw_stats, ss->fw_stats_bus);
3481                         ss->fw_stats = NULL;
3482                 }
3483         }
3484         kfree(mgp->ss);
3485         mgp->ss = NULL;
3486 }
3487
3488 static int myri10ge_alloc_slices(struct myri10ge_priv *mgp)
3489 {
3490         struct myri10ge_slice_state *ss;
3491         struct pci_dev *pdev = mgp->pdev;
3492         size_t bytes;
3493         int i;
3494
3495         bytes = sizeof(*mgp->ss) * mgp->num_slices;
3496         mgp->ss = kzalloc(bytes, GFP_KERNEL);
3497         if (mgp->ss == NULL) {
3498                 return -ENOMEM;
3499         }
3500
3501         for (i = 0; i < mgp->num_slices; i++) {
3502                 ss = &mgp->ss[i];
3503                 bytes = mgp->max_intr_slots * sizeof(*ss->rx_done.entry);
3504                 ss->rx_done.entry = dma_alloc_coherent(&pdev->dev, bytes,
3505                                                        &ss->rx_done.bus,
3506                                                        GFP_KERNEL);
3507                 if (ss->rx_done.entry == NULL)
3508                         goto abort;
3509                 memset(ss->rx_done.entry, 0, bytes);
3510                 bytes = sizeof(*ss->fw_stats);
3511                 ss->fw_stats = dma_alloc_coherent(&pdev->dev, bytes,
3512                                                   &ss->fw_stats_bus,
3513                                                   GFP_KERNEL);
3514                 if (ss->fw_stats == NULL)
3515                         goto abort;
3516                 ss->mgp = mgp;
3517                 ss->dev = mgp->dev;
3518                 netif_napi_add(ss->dev, &ss->napi, myri10ge_poll,
3519                                myri10ge_napi_weight);
3520         }
3521         return 0;
3522 abort:
3523         myri10ge_free_slices(mgp);
3524         return -ENOMEM;
3525 }
3526
3527 /*
3528  * This function determines the number of slices supported.
3529  * The number slices is the minumum of the number of CPUS,
3530  * the number of MSI-X irqs supported, the number of slices
3531  * supported by the firmware
3532  */
3533 static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
3534 {
3535         struct myri10ge_cmd cmd;
3536         struct pci_dev *pdev = mgp->pdev;
3537         char *old_fw;
3538         int i, status, ncpus, msix_cap;
3539
3540         mgp->num_slices = 1;
3541         msix_cap = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3542         ncpus = num_online_cpus();
3543
3544         if (myri10ge_max_slices == 1 || msix_cap == 0 ||
3545             (myri10ge_max_slices == -1 && ncpus < 2))
3546                 return;
3547
3548         /* try to load the slice aware rss firmware */
3549         old_fw = mgp->fw_name;
3550         if (myri10ge_fw_name != NULL) {
3551                 dev_info(&mgp->pdev->dev, "overriding rss firmware to %s\n",
3552                          myri10ge_fw_name);
3553                 mgp->fw_name = myri10ge_fw_name;
3554         } else if (old_fw == myri10ge_fw_aligned)
3555                 mgp->fw_name = myri10ge_fw_rss_aligned;
3556         else
3557                 mgp->fw_name = myri10ge_fw_rss_unaligned;
3558         status = myri10ge_load_firmware(mgp, 0);
3559         if (status != 0) {
3560                 dev_info(&pdev->dev, "Rss firmware not found\n");
3561                 return;
3562         }
3563
3564         /* hit the board with a reset to ensure it is alive */
3565         memset(&cmd, 0, sizeof(cmd));
3566         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
3567         if (status != 0) {
3568                 dev_err(&mgp->pdev->dev, "failed reset\n");
3569                 goto abort_with_fw;
3570                 return;
3571         }
3572
3573         mgp->max_intr_slots = cmd.data0 / sizeof(struct mcp_slot);
3574
3575         /* tell it the size of the interrupt queues */
3576         cmd.data0 = mgp->max_intr_slots * sizeof(struct mcp_slot);
3577         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
3578         if (status != 0) {
3579                 dev_err(&mgp->pdev->dev, "failed MXGEFW_CMD_SET_INTRQ_SIZE\n");
3580                 goto abort_with_fw;
3581         }
3582
3583         /* ask the maximum number of slices it supports */
3584         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES, &cmd, 0);
3585         if (status != 0)
3586                 goto abort_with_fw;
3587         else
3588                 mgp->num_slices = cmd.data0;
3589
3590         /* Only allow multiple slices if MSI-X is usable */
3591         if (!myri10ge_msi) {
3592                 goto abort_with_fw;
3593         }
3594
3595         /* if the admin did not specify a limit to how many
3596          * slices we should use, cap it automatically to the
3597          * number of CPUs currently online */
3598         if (myri10ge_max_slices == -1)
3599                 myri10ge_max_slices = ncpus;
3600
3601         if (mgp->num_slices > myri10ge_max_slices)
3602                 mgp->num_slices = myri10ge_max_slices;
3603
3604         /* Now try to allocate as many MSI-X vectors as we have
3605          * slices. We give up on MSI-X if we can only get a single
3606          * vector. */
3607
3608         mgp->msix_vectors = kzalloc(mgp->num_slices *
3609                                     sizeof(*mgp->msix_vectors), GFP_KERNEL);
3610         if (mgp->msix_vectors == NULL)
3611                 goto disable_msix;
3612         for (i = 0; i < mgp->num_slices; i++) {
3613                 mgp->msix_vectors[i].entry = i;
3614         }
3615
3616         while (mgp->num_slices > 1) {
3617                 /* make sure it is a power of two */
3618                 while (!is_power_of_2(mgp->num_slices))
3619                         mgp->num_slices--;
3620                 if (mgp->num_slices == 1)
3621                         goto disable_msix;
3622                 status = pci_enable_msix(pdev, mgp->msix_vectors,
3623                                          mgp->num_slices);
3624                 if (status == 0) {
3625                         pci_disable_msix(pdev);
3626                         return;
3627                 }
3628                 if (status > 0)
3629                         mgp->num_slices = status;
3630                 else
3631                         goto disable_msix;
3632         }
3633
3634 disable_msix:
3635         if (mgp->msix_vectors != NULL) {
3636                 kfree(mgp->msix_vectors);
3637                 mgp->msix_vectors = NULL;
3638         }
3639
3640 abort_with_fw:
3641         mgp->num_slices = 1;
3642         mgp->fw_name = old_fw;
3643         myri10ge_load_firmware(mgp, 0);
3644 }
3645
3646 static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3647 {
3648         struct net_device *netdev;
3649         struct myri10ge_priv *mgp;
3650         struct device *dev = &pdev->dev;
3651         int i;
3652         int status = -ENXIO;
3653         int dac_enabled;
3654
3655         netdev = alloc_etherdev(sizeof(*mgp));
3656         if (netdev == NULL) {
3657                 dev_err(dev, "Could not allocate ethernet device\n");
3658                 return -ENOMEM;
3659         }
3660
3661         SET_NETDEV_DEV(netdev, &pdev->dev);
3662
3663         mgp = netdev_priv(netdev);
3664         mgp->dev = netdev;
3665         mgp->pdev = pdev;
3666         mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
3667         mgp->pause = myri10ge_flow_control;
3668         mgp->intr_coal_delay = myri10ge_intr_coal_delay;
3669         mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT);
3670         init_waitqueue_head(&mgp->down_wq);
3671
3672         if (pci_enable_device(pdev)) {
3673                 dev_err(&pdev->dev, "pci_enable_device call failed\n");
3674                 status = -ENODEV;
3675                 goto abort_with_netdev;
3676         }
3677
3678         /* Find the vendor-specific cap so we can check
3679          * the reboot register later on */
3680         mgp->vendor_specific_offset
3681             = pci_find_capability(pdev, PCI_CAP_ID_VNDR);
3682
3683         /* Set our max read request to 4KB */
3684         status = pcie_set_readrq(pdev, 4096);
3685         if (status != 0) {
3686                 dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n",
3687                         status);
3688                 goto abort_with_netdev;
3689         }
3690
3691         pci_set_master(pdev);
3692         dac_enabled = 1;
3693         status = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
3694         if (status != 0) {
3695                 dac_enabled = 0;
3696                 dev_err(&pdev->dev,
3697                         "64-bit pci address mask was refused, "
3698                         "trying 32-bit\n");
3699                 status = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
3700         }
3701         if (status != 0) {
3702                 dev_err(&pdev->dev, "Error %d setting DMA mask\n", status);
3703                 goto abort_with_netdev;
3704         }
3705         (void)pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
3706         mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd),
3707                                       &mgp->cmd_bus, GFP_KERNEL);
3708         if (mgp->cmd == NULL)
3709                 goto abort_with_netdev;
3710
3711         mgp->board_span = pci_resource_len(pdev, 0);
3712         mgp->iomem_base = pci_resource_start(pdev, 0);
3713         mgp->mtrr = -1;
3714         mgp->wc_enabled = 0;
3715 #ifdef CONFIG_MTRR
3716         mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span,
3717                              MTRR_TYPE_WRCOMB, 1);
3718         if (mgp->mtrr >= 0)
3719                 mgp->wc_enabled = 1;
3720 #endif
3721         /* Hack.  need to get rid of these magic numbers */
3722         mgp->sram_size =
3723             2 * 1024 * 1024 - (2 * (48 * 1024) + (32 * 1024)) - 0x100;
3724         if (mgp->sram_size > mgp->board_span) {
3725                 dev_err(&pdev->dev, "board span %ld bytes too small\n",
3726                         mgp->board_span);
3727                 goto abort_with_mtrr;
3728         }
3729         mgp->sram = ioremap_wc(mgp->iomem_base, mgp->board_span);
3730         if (mgp->sram == NULL) {
3731                 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n",
3732                         mgp->board_span, mgp->iomem_base);
3733                 status = -ENXIO;
3734                 goto abort_with_mtrr;
3735         }
3736         memcpy_fromio(mgp->eeprom_strings,
3737                       mgp->sram + mgp->sram_size - MYRI10GE_EEPROM_STRINGS_SIZE,
3738                       MYRI10GE_EEPROM_STRINGS_SIZE);
3739         memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2);
3740         status = myri10ge_read_mac_addr(mgp);
3741         if (status)
3742                 goto abort_with_ioremap;
3743
3744         for (i = 0; i < ETH_ALEN; i++)
3745                 netdev->dev_addr[i] = mgp->mac_addr[i];
3746
3747         myri10ge_select_firmware(mgp);
3748
3749         status = myri10ge_load_firmware(mgp, 1);
3750         if (status != 0) {
3751                 dev_err(&pdev->dev, "failed to load firmware\n");
3752                 goto abort_with_ioremap;
3753         }
3754         myri10ge_probe_slices(mgp);
3755         status = myri10ge_alloc_slices(mgp);
3756         if (status != 0) {
3757                 dev_err(&pdev->dev, "failed to alloc slice state\n");
3758                 goto abort_with_firmware;
3759         }
3760
3761         status = myri10ge_reset(mgp);
3762         if (status != 0) {
3763                 dev_err(&pdev->dev, "failed reset\n");
3764                 goto abort_with_slices;
3765         }
3766 #ifdef CONFIG_DCA
3767         myri10ge_setup_dca(mgp);
3768 #endif
3769         pci_set_drvdata(pdev, mgp);
3770         if ((myri10ge_initial_mtu + ETH_HLEN) > MYRI10GE_MAX_ETHER_MTU)
3771                 myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
3772         if ((myri10ge_initial_mtu + ETH_HLEN) < 68)
3773                 myri10ge_initial_mtu = 68;
3774         netdev->mtu = myri10ge_initial_mtu;
3775         netdev->open = myri10ge_open;
3776         netdev->stop = myri10ge_close;
3777         netdev->hard_start_xmit = myri10ge_xmit;
3778         netdev->get_stats = myri10ge_get_stats;
3779         netdev->base_addr = mgp->iomem_base;
3780         netdev->change_mtu = myri10ge_change_mtu;
3781         netdev->set_multicast_list = myri10ge_set_multicast_list;
3782         netdev->set_mac_address = myri10ge_set_mac_address;
3783         netdev->features = mgp->features;
3784         if (dac_enabled)
3785                 netdev->features |= NETIF_F_HIGHDMA;
3786
3787         /* make sure we can get an irq, and that MSI can be
3788          * setup (if available).  Also ensure netdev->irq
3789          * is set to correct value if MSI is enabled */
3790         status = myri10ge_request_irq(mgp);
3791         if (status != 0)
3792                 goto abort_with_firmware;
3793         netdev->irq = pdev->irq;
3794         myri10ge_free_irq(mgp);
3795
3796         /* Save configuration space to be restored if the
3797          * nic resets due to a parity error */
3798         pci_save_state(pdev);
3799
3800         /* Setup the watchdog timer */
3801         setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer,
3802                     (unsigned long)mgp);
3803
3804         SET_ETHTOOL_OPS(netdev, &myri10ge_ethtool_ops);
3805         INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog);
3806         status = register_netdev(netdev);
3807         if (status != 0) {
3808                 dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
3809                 goto abort_with_state;
3810         }
3811         if (mgp->msix_enabled)
3812                 dev_info(dev, "%d MSI-X IRQs, tx bndry %d, fw %s, WC %s\n",
3813                          mgp->num_slices, mgp->tx_boundary, mgp->fw_name,
3814                          (mgp->wc_enabled ? "Enabled" : "Disabled"));
3815         else
3816                 dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, WC %s\n",
3817                          mgp->msi_enabled ? "MSI" : "xPIC",
3818                          netdev->irq, mgp->tx_boundary, mgp->fw_name,
3819                          (mgp->wc_enabled ? "Enabled" : "Disabled"));
3820
3821         return 0;
3822
3823 abort_with_state:
3824         pci_restore_state(pdev);
3825
3826 abort_with_slices:
3827         myri10ge_free_slices(mgp);
3828
3829 abort_with_firmware:
3830         myri10ge_dummy_rdma(mgp, 0);
3831
3832 abort_with_ioremap:
3833         iounmap(mgp->sram);
3834
3835 abort_with_mtrr:
3836 #ifdef CONFIG_MTRR
3837         if (mgp->mtrr >= 0)
3838                 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
3839 #endif
3840         dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
3841                           mgp->cmd, mgp->cmd_bus);
3842
3843 abort_with_netdev:
3844
3845         free_netdev(netdev);
3846         return status;
3847 }
3848
3849 /*
3850  * myri10ge_remove
3851  *
3852  * Does what is necessary to shutdown one Myrinet device. Called
3853  *   once for each Myrinet card by the kernel when a module is
3854  *   unloaded.
3855  */
3856 static void myri10ge_remove(struct pci_dev *pdev)
3857 {
3858         struct myri10ge_priv *mgp;
3859         struct net_device *netdev;
3860
3861         mgp = pci_get_drvdata(pdev);
3862         if (mgp == NULL)
3863                 return;
3864
3865         flush_scheduled_work();
3866         netdev = mgp->dev;
3867         unregister_netdev(netdev);
3868
3869 #ifdef CONFIG_DCA
3870         myri10ge_teardown_dca(mgp);
3871 #endif
3872         myri10ge_dummy_rdma(mgp, 0);
3873
3874         /* avoid a memory leak */
3875         pci_restore_state(pdev);
3876
3877         iounmap(mgp->sram);
3878
3879 #ifdef CONFIG_MTRR
3880         if (mgp->mtrr >= 0)
3881                 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
3882 #endif
3883         myri10ge_free_slices(mgp);
3884         if (mgp->msix_vectors != NULL)
3885                 kfree(mgp->msix_vectors);
3886         dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
3887                           mgp->cmd, mgp->cmd_bus);
3888
3889         free_netdev(netdev);
3890         pci_set_drvdata(pdev, NULL);
3891 }
3892
3893 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E      0x0008
3894 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9    0x0009
3895
3896 static struct pci_device_id myri10ge_pci_tbl[] = {
3897         {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)},
3898         {PCI_DEVICE
3899          (PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9)},
3900         {0},
3901 };
3902
3903 static struct pci_driver myri10ge_driver = {
3904         .name = "myri10ge",
3905         .probe = myri10ge_probe,
3906         .remove = myri10ge_remove,
3907         .id_table = myri10ge_pci_tbl,
3908 #ifdef CONFIG_PM
3909         .suspend = myri10ge_suspend,
3910         .resume = myri10ge_resume,
3911 #endif
3912 };
3913
3914 #ifdef CONFIG_DCA
3915 static int
3916 myri10ge_notify_dca(struct notifier_block *nb, unsigned long event, void *p)
3917 {
3918         int err = driver_for_each_device(&myri10ge_driver.driver,
3919                                          NULL, &event,
3920                                          myri10ge_notify_dca_device);
3921
3922         if (err)
3923                 return NOTIFY_BAD;
3924         return NOTIFY_DONE;
3925 }
3926
3927 static struct notifier_block myri10ge_dca_notifier = {
3928         .notifier_call = myri10ge_notify_dca,
3929         .next = NULL,
3930         .priority = 0,
3931 };
3932 #endif                          /* CONFIG_DCA */
3933
3934 static __init int myri10ge_init_module(void)
3935 {
3936         printk(KERN_INFO "%s: Version %s\n", myri10ge_driver.name,
3937                MYRI10GE_VERSION_STR);
3938
3939         if (myri10ge_rss_hash > MXGEFW_RSS_HASH_TYPE_SRC_PORT ||
3940             myri10ge_rss_hash < MXGEFW_RSS_HASH_TYPE_IPV4) {
3941                 printk(KERN_ERR
3942                        "%s: Illegal rssh hash type %d, defaulting to source port\n",
3943                        myri10ge_driver.name, myri10ge_rss_hash);
3944                 myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT;
3945         }
3946 #ifdef CONFIG_DCA
3947         dca_register_notify(&myri10ge_dca_notifier);
3948 #endif
3949
3950         return pci_register_driver(&myri10ge_driver);
3951 }
3952
3953 module_init(myri10ge_init_module);
3954
3955 static __exit void myri10ge_cleanup_module(void)
3956 {
3957 #ifdef CONFIG_DCA
3958         dca_unregister_notify(&myri10ge_dca_notifier);
3959 #endif
3960         pci_unregister_driver(&myri10ge_driver);
3961 }
3962
3963 module_exit(myri10ge_cleanup_module);