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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/version.h>
  60 #include <linux/timer.h>
  61 #include <linux/vmalloc.h>
  62 #include <linux/crc32.h>
  63 #include <linux/moduleparam.h>
  64 #include <linux/io.h>
  65 #include <linux/log2.h>
  66 #include <net/checksum.h>
  67 #include <net/ip.h>
  68 #include <net/tcp.h>
  69 #include <asm/byteorder.h>
  70 #include <asm/io.h>
  71 #include <asm/processor.h>
  72 #ifdef CONFIG_MTRR
  73 #include <asm/mtrr.h>
  74 #endif
  75
  76 #include "myri10ge_mcp.h"
  77 #include "myri10ge_mcp_gen_header.h"
  78
  79 #define MYRI10GE_VERSION_STR "1.3.99-1.347"
  80
  81 MODULE_DESCRIPTION("Myricom 10G driver (10GbE)");
  82 MODULE_AUTHOR("Maintainer: help@myri.com");
  83 MODULE_VERSION(MYRI10GE_VERSION_STR);
  84 MODULE_LICENSE("Dual BSD/GPL");
  85
  86 #define MYRI10GE_MAX_ETHER_MTU 9014
  87
  88 #define MYRI10GE_ETH_STOPPED 0
  89 #define MYRI10GE_ETH_STOPPING 1
  90 #define MYRI10GE_ETH_STARTING 2
  91 #define MYRI10GE_ETH_RUNNING 3
  92 #define MYRI10GE_ETH_OPEN_FAILED 4
  93
  94 #define MYRI10GE_EEPROM_STRINGS_SIZE 256
  95 #define MYRI10GE_MAX_SEND_DESC_TSO ((65536 / 2048) * 2)
  96 #define MYRI10GE_MAX_LRO_DESCRIPTORS 8
  97 #define MYRI10GE_LRO_MAX_PKTS 64
  98
  99 #define MYRI10GE_NO_CONFIRM_DATA htonl(0xffffffff)
 100 #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff
 101
 102 #define MYRI10GE_ALLOC_ORDER 0
 103 #define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE)
 104 #define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1)
 105
 106 struct myri10ge_rx_buffer_state {
 107         struct page *page;
 108         int page_offset;
 109          DECLARE_PCI_UNMAP_ADDR(bus)
 110          DECLARE_PCI_UNMAP_LEN(len)
 111 };
 112
 113 struct myri10ge_tx_buffer_state {
 114         struct sk_buff *skb;
 115         int last;
 116          DECLARE_PCI_UNMAP_ADDR(bus)
 117          DECLARE_PCI_UNMAP_LEN(len)
 118 };
 119
 120 struct myri10ge_cmd {
 121         u32 data0;
 122         u32 data1;
 123         u32 data2;
 124 };
 125
 126 struct myri10ge_rx_buf {
 127         struct mcp_kreq_ether_recv __iomem *lanai;      /* lanai ptr for recv ring */
 128         struct mcp_kreq_ether_recv *shadow;     /* host shadow of recv ring */
 129         struct myri10ge_rx_buffer_state *info;
 130         struct page *page;
 131         dma_addr_t bus;
 132         int page_offset;
 133         int cnt;
 134         int fill_cnt;
 135         int alloc_fail;
 136         int mask;               /* number of rx slots -1 */
 137         int watchdog_needed;
 138 };
 139
 140 struct myri10ge_tx_buf {
 141         struct mcp_kreq_ether_send __iomem *lanai;      /* lanai ptr for sendq */
 142         struct mcp_kreq_ether_send *req_list;   /* host shadow of sendq */
 143         char *req_bytes;
 144         struct myri10ge_tx_buffer_state *info;
 145         int mask;               /* number of transmit slots -1  */
 146         int req ____cacheline_aligned;  /* transmit slots submitted     */
 147         int pkt_start;          /* packets started */
 148         int stop_queue;
 149         int linearized;
 150         int done ____cacheline_aligned; /* transmit slots completed     */
 151         int pkt_done;           /* packets completed */
 152         int wake_queue;
 153 };
 154
 155 struct myri10ge_rx_done {
 156         struct mcp_slot *entry;
 157         dma_addr_t bus;
 158         int cnt;
 159         int idx;
 160         struct net_lro_mgr lro_mgr;
 161         struct net_lro_desc lro_desc[MYRI10GE_MAX_LRO_DESCRIPTORS];
 162 };
 163
 164 struct myri10ge_slice_netstats {
 165         unsigned long rx_packets;
 166         unsigned long tx_packets;
 167         unsigned long rx_bytes;
 168         unsigned long tx_bytes;
 169         unsigned long rx_dropped;
 170         unsigned long tx_dropped;
 171 };
 172
 173 struct myri10ge_slice_state {
 174         struct myri10ge_tx_buf tx;      /* transmit ring        */
 175         struct myri10ge_rx_buf rx_small;
 176         struct myri10ge_rx_buf rx_big;
 177         struct myri10ge_rx_done rx_done;
 178         struct net_device *dev;
 179         struct napi_struct napi;
 180         struct myri10ge_priv *mgp;
 181         struct myri10ge_slice_netstats stats;
 182         __be32 __iomem *irq_claim;
 183         struct mcp_irq_data *fw_stats;
 184         dma_addr_t fw_stats_bus;
 185         int watchdog_tx_done;
 186         int watchdog_tx_req;
 187 #ifdef CONFIG_DCA
 188         int cached_dca_tag;
 189         int cpu;
 190         __be32 __iomem *dca_tag;
 191 #endif
 192         char irq_desc[32];
 193 };
 194
 195 struct myri10ge_priv {
 196         struct myri10ge_slice_state *ss;
 197         int tx_boundary;        /* boundary transmits cannot cross */
 198         int num_slices;
 199         int running;            /* running?             */
 200         int csum_flag;          /* rx_csums?            */
 201         int small_bytes;
 202         int big_bytes;
 203         int max_intr_slots;
 204         struct net_device *dev;
 205         struct net_device_stats stats;
 206         spinlock_t stats_lock;
 207         u8 __iomem *sram;
 208         int sram_size;
 209         unsigned long board_span;
 210         unsigned long iomem_base;
 211         __be32 __iomem *irq_deassert;
 212         char *mac_addr_string;
 213         struct mcp_cmd_response *cmd;
 214         dma_addr_t cmd_bus;
 215         struct pci_dev *pdev;
 216         int msi_enabled;
 217         int msix_enabled;
 218         struct msix_entry *msix_vectors;
 219 #ifdef CONFIG_DCA
 220         int dca_enabled;
 221 #endif
 222         u32 link_state;
 223         unsigned int rdma_tags_available;
 224         int intr_coal_delay;
 225         __be32 __iomem *intr_coal_delay_ptr;
 226         int mtrr;
 227         int wc_enabled;
 228         int down_cnt;
 229         wait_queue_head_t down_wq;
 230         struct work_struct watchdog_work;
 231         struct timer_list watchdog_timer;
 232         int watchdog_resets;
 233         int watchdog_pause;
 234         int pause;
 235         char *fw_name;
 236         char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
 237         char *product_code_string;
 238         char fw_version[128];
 239         int fw_ver_major;
 240         int fw_ver_minor;
 241         int fw_ver_tiny;
 242         int adopted_rx_filter_bug;
 243         u8 mac_addr[6];         /* eeprom mac address */
 244         unsigned long serial_number;
 245         int vendor_specific_offset;
 246         int fw_multicast_support;
 247         unsigned long features;
 248         u32 max_tso6;
 249         u32 read_dma;
 250         u32 write_dma;
 251         u32 read_write_dma;
 252         u32 link_changes;
 253         u32 msg_enable;
 254 };
 255
 256 static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat";
 257 static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat";
 258 static char *myri10ge_fw_rss_unaligned = "myri10ge_rss_ethp_z8e.dat";
 259 static char *myri10ge_fw_rss_aligned = "myri10ge_rss_eth_z8e.dat";
 260
 261 static char *myri10ge_fw_name = NULL;
 262 module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR);
 263 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name");
 264
 265 static int myri10ge_ecrc_enable = 1;
 266 module_param(myri10ge_ecrc_enable, int, S_IRUGO);
 267 MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E");
 268
 269 static int myri10ge_small_bytes = -1;   /* -1 == auto */
 270 module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR);
 271 MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets");
 272
 273 static int myri10ge_msi = 1;    /* enable msi by default */
 274 module_param(myri10ge_msi, int, S_IRUGO | S_IWUSR);
 275 MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts");
 276
 277 static int myri10ge_intr_coal_delay = 75;
 278 module_param(myri10ge_intr_coal_delay, int, S_IRUGO);
 279 MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay");
 280
 281 static int myri10ge_flow_control = 1;
 282 module_param(myri10ge_flow_control, int, S_IRUGO);
 283 MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter");
 284
 285 static int myri10ge_deassert_wait = 1;
 286 module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR);
 287 MODULE_PARM_DESC(myri10ge_deassert_wait,
 288                  "Wait when deasserting legacy interrupts");
 289
 290 static int myri10ge_force_firmware = 0;
 291 module_param(myri10ge_force_firmware, int, S_IRUGO);
 292 MODULE_PARM_DESC(myri10ge_force_firmware,
 293                  "Force firmware to assume aligned completions");
 294
 295 static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
 296 module_param(myri10ge_initial_mtu, int, S_IRUGO);
 297 MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU");
 298
 299 static int myri10ge_napi_weight = 64;
 300 module_param(myri10ge_napi_weight, int, S_IRUGO);
 301 MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight");
 302
 303 static int myri10ge_watchdog_timeout = 1;
 304 module_param(myri10ge_watchdog_timeout, int, S_IRUGO);
 305 MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout");
 306
 307 static int myri10ge_max_irq_loops = 1048576;
 308 module_param(myri10ge_max_irq_loops, int, S_IRUGO);
 309 MODULE_PARM_DESC(myri10ge_max_irq_loops,
 310                  "Set stuck legacy IRQ detection threshold");
 311
 312 #define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK
 313
 314 static int myri10ge_debug = -1; /* defaults above */
 315 module_param(myri10ge_debug, int, 0);
 316 MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)");
 317
 318 static int myri10ge_lro = 1;
 319 module_param(myri10ge_lro, int, S_IRUGO);
 320 MODULE_PARM_DESC(myri10ge_lro, "Enable large receive offload");
 321
 322 static int myri10ge_lro_max_pkts = MYRI10GE_LRO_MAX_PKTS;
 323 module_param(myri10ge_lro_max_pkts, int, S_IRUGO);
 324 MODULE_PARM_DESC(myri10ge_lro_max_pkts,
 325                  "Number of LRO packets to be aggregated");
 326
 327 static int myri10ge_fill_thresh = 256;
 328 module_param(myri10ge_fill_thresh, int, S_IRUGO | S_IWUSR);
 329 MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed");
 330
 331 static int myri10ge_reset_recover = 1;
 332
 333 static int myri10ge_max_slices = 1;
 334 module_param(myri10ge_max_slices, int, S_IRUGO);
 335 MODULE_PARM_DESC(myri10ge_max_slices, "Max tx/rx queues");
 336
 337 static int myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT;
 338 module_param(myri10ge_rss_hash, int, S_IRUGO);
 339 MODULE_PARM_DESC(myri10ge_rss_hash, "Type of RSS hashing to do");
 340
 341 static int myri10ge_dca = 1;
 342 module_param(myri10ge_dca, int, S_IRUGO);
 343 MODULE_PARM_DESC(myri10ge_dca, "Enable DCA if possible");
 344
 345 #define MYRI10GE_FW_OFFSET 1024*1024
 346 #define MYRI10GE_HIGHPART_TO_U32(X) \
 347 (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0)
 348 #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X))
 349
 350 #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8)
 351
 352 static void myri10ge_set_multicast_list(struct net_device *dev);
 353 static int myri10ge_sw_tso(struct sk_buff *skb, struct net_device *dev);
 354
 355 static inline void put_be32(__be32 val, __be32 __iomem * p)
 356 {
 357         __raw_writel((__force __u32) val, (__force void __iomem *)p);
 358 }
 359
 360 static int
 361 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
 362                   struct myri10ge_cmd *data, int atomic)
 363 {
 364         struct mcp_cmd *buf;
 365         char buf_bytes[sizeof(*buf) + 8];
 366         struct mcp_cmd_response *response = mgp->cmd;
 367         char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD;
 368         u32 dma_low, dma_high, result, value;
 369         int sleep_total = 0;
 370
 371         /* ensure buf is aligned to 8 bytes */
 372         buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8);
 373
 374         buf->data0 = htonl(data->data0);
 375         buf->data1 = htonl(data->data1);
 376         buf->data2 = htonl(data->data2);
 377         buf->cmd = htonl(cmd);
 378         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
 379         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
 380
 381         buf->response_addr.low = htonl(dma_low);
 382         buf->response_addr.high = htonl(dma_high);
 383         response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT);
 384         mb();
 385         myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf));
 386
 387         /* wait up to 15ms. Longest command is the DMA benchmark,
 388          * which is capped at 5ms, but runs from a timeout handler
 389          * that runs every 7.8ms. So a 15ms timeout leaves us with
 390          * a 2.2ms margin
 391          */
 392         if (atomic) {
 393                 /* if atomic is set, do not sleep,
 394                  * and try to get the completion quickly
 395                  * (1ms will be enough for those commands) */
 396                 for (sleep_total = 0;
 397                      sleep_total < 1000
 398                      && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
 399                      sleep_total += 10) {
 400                         udelay(10);
 401                         mb();
 402                 }
 403         } else {
 404                 /* use msleep for most command */
 405                 for (sleep_total = 0;
 406                      sleep_total < 15
 407                      && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
 408                      sleep_total++)
 409                         msleep(1);
 410         }
 411
 412         result = ntohl(response->result);
 413         value = ntohl(response->data);
 414         if (result != MYRI10GE_NO_RESPONSE_RESULT) {
 415                 if (result == 0) {
 416                         data->data0 = value;
 417                         return 0;
 418                 } else if (result == MXGEFW_CMD_UNKNOWN) {
 419                         return -ENOSYS;
 420                 } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) {
 421                         return -E2BIG;
 422                 } else {
 423                         dev_err(&mgp->pdev->dev,
 424                                 "command %d failed, result = %d\n",
 425                                 cmd, result);
 426                         return -ENXIO;
 427                 }
 428         }
 429
 430         dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n",
 431                 cmd, result);
 432         return -EAGAIN;
 433 }
 434
 435 /*
 436  * The eeprom strings on the lanaiX have the format
 437  * SN=x\0
 438  * MAC=x:x:x:x:x:x\0
 439  * PT:ddd mmm xx xx:xx:xx xx\0
 440  * PV:ddd mmm xx xx:xx:xx xx\0
 441  */
 442 static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp)
 443 {
 444         char *ptr, *limit;
 445         int i;
 446
 447         ptr = mgp->eeprom_strings;
 448         limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE;
 449
 450         while (*ptr != '\0' && ptr < limit) {
 451                 if (memcmp(ptr, "MAC=", 4) == 0) {
 452                         ptr += 4;
 453                         mgp->mac_addr_string = ptr;
 454                         for (i = 0; i < 6; i++) {
 455                                 if ((ptr + 2) > limit)
 456                                         goto abort;
 457                                 mgp->mac_addr[i] =
 458                                     simple_strtoul(ptr, &ptr, 16);
 459                                 ptr += 1;
 460                         }
 461                 }
 462                 if (memcmp(ptr, "PC=", 3) == 0) {
 463                         ptr += 3;
 464                         mgp->product_code_string = ptr;
 465                 }
 466                 if (memcmp((const void *)ptr, "SN=", 3) == 0) {
 467                         ptr += 3;
 468                         mgp->serial_number = simple_strtoul(ptr, &ptr, 10);
 469                 }
 470                 while (ptr < limit && *ptr++) ;
 471         }
 472
 473         return 0;
 474
 475 abort:
 476         dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n");
 477         return -ENXIO;
 478 }
 479
 480 /*
 481  * Enable or disable periodic RDMAs from the host to make certain
 482  * chipsets resend dropped PCIe messages
 483  */
 484
 485 static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable)
 486 {
 487         char __iomem *submit;
 488         __be32 buf[16] __attribute__ ((__aligned__(8)));
 489         u32 dma_low, dma_high;
 490         int i;
 491
 492         /* clear confirmation addr */
 493         mgp->cmd->data = 0;
 494         mb();
 495
 496         /* send a rdma command to the PCIe engine, and wait for the
 497          * response in the confirmation address.  The firmware should
 498          * write a -1 there to indicate it is alive and well
 499          */
 500         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
 501         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
 502
 503         buf[0] = htonl(dma_high);       /* confirm addr MSW */
 504         buf[1] = htonl(dma_low);        /* confirm addr LSW */
 505         buf[2] = MYRI10GE_NO_CONFIRM_DATA;      /* confirm data */
 506         buf[3] = htonl(dma_high);       /* dummy addr MSW */
 507         buf[4] = htonl(dma_low);        /* dummy addr LSW */
 508         buf[5] = htonl(enable); /* enable? */
 509
 510         submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA;
 511
 512         myri10ge_pio_copy(submit, &buf, sizeof(buf));
 513         for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++)
 514                 msleep(1);
 515         if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA)
 516                 dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n",
 517                         (enable ? "enable" : "disable"));
 518 }
 519
 520 static int
 521 myri10ge_validate_firmware(struct myri10ge_priv *mgp,
 522                            struct mcp_gen_header *hdr)
 523 {
 524         struct device *dev = &mgp->pdev->dev;
 525
 526         /* check firmware type */
 527         if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) {
 528                 dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type));
 529                 return -EINVAL;
 530         }
 531
 532         /* save firmware version for ethtool */
 533         strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
 534
 535         sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major,
 536                &mgp->fw_ver_minor, &mgp->fw_ver_tiny);
 537
 538         if (!(mgp->fw_ver_major == MXGEFW_VERSION_MAJOR
 539               && mgp->fw_ver_minor == MXGEFW_VERSION_MINOR)) {
 540                 dev_err(dev, "Found firmware version %s\n", mgp->fw_version);
 541                 dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR,
 542                         MXGEFW_VERSION_MINOR);
 543                 return -EINVAL;
 544         }
 545         return 0;
 546 }
 547
 548 static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size)
 549 {
 550         unsigned crc, reread_crc;
 551         const struct firmware *fw;
 552         struct device *dev = &mgp->pdev->dev;
 553         unsigned char *fw_readback;
 554         struct mcp_gen_header *hdr;
 555         size_t hdr_offset;
 556         int status;
 557         unsigned i;
 558
 559         if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) {
 560                 dev_err(dev, "Unable to load %s firmware image via hotplug\n",
 561                         mgp->fw_name);
 562                 status = -EINVAL;
 563                 goto abort_with_nothing;
 564         }
 565
 566         /* check size */
 567
 568         if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET ||
 569             fw->size < MCP_HEADER_PTR_OFFSET + 4) {
 570                 dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size);
 571                 status = -EINVAL;
 572                 goto abort_with_fw;
 573         }
 574
 575         /* check id */
 576         hdr_offset = ntohl(*(__be32 *) (fw->data + MCP_HEADER_PTR_OFFSET));
 577         if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) {
 578                 dev_err(dev, "Bad firmware file\n");
 579                 status = -EINVAL;
 580                 goto abort_with_fw;
 581         }
 582         hdr = (void *)(fw->data + hdr_offset);
 583
 584         status = myri10ge_validate_firmware(mgp, hdr);
 585         if (status != 0)
 586                 goto abort_with_fw;
 587
 588         crc = crc32(~0, fw->data, fw->size);
 589         for (i = 0; i < fw->size; i += 256) {
 590                 myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i,
 591                                   fw->data + i,
 592                                   min(256U, (unsigned)(fw->size - i)));
 593                 mb();
 594                 readb(mgp->sram);
 595         }
 596         fw_readback = vmalloc(fw->size);
 597         if (!fw_readback) {
 598                 status = -ENOMEM;
 599                 goto abort_with_fw;
 600         }
 601         /* corruption checking is good for parity recovery and buggy chipset */
 602         memcpy_fromio(fw_readback, mgp->sram + MYRI10GE_FW_OFFSET, fw->size);
 603         reread_crc = crc32(~0, fw_readback, fw->size);
 604         vfree(fw_readback);
 605         if (crc != reread_crc) {
 606                 dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n",
 607                         (unsigned)fw->size, reread_crc, crc);
 608                 status = -EIO;
 609                 goto abort_with_fw;
 610         }
 611         *size = (u32) fw->size;
 612
 613 abort_with_fw:
 614         release_firmware(fw);
 615
 616 abort_with_nothing:
 617         return status;
 618 }
 619
 620 static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp)
 621 {
 622         struct mcp_gen_header *hdr;
 623         struct device *dev = &mgp->pdev->dev;
 624         const size_t bytes = sizeof(struct mcp_gen_header);
 625         size_t hdr_offset;
 626         int status;
 627
 628         /* find running firmware header */
 629         hdr_offset = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET));
 630
 631         if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) {
 632                 dev_err(dev, "Running firmware has bad header offset (%d)\n",
 633                         (int)hdr_offset);
 634                 return -EIO;
 635         }
 636
 637         /* copy header of running firmware from SRAM to host memory to
 638          * validate firmware */
 639         hdr = kmalloc(bytes, GFP_KERNEL);
 640         if (hdr == NULL) {
 641                 dev_err(dev, "could not malloc firmware hdr\n");
 642                 return -ENOMEM;
 643         }
 644         memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes);
 645         status = myri10ge_validate_firmware(mgp, hdr);
 646         kfree(hdr);
 647
 648         /* check to see if adopted firmware has bug where adopting
 649          * it will cause broadcasts to be filtered unless the NIC
 650          * is kept in ALLMULTI mode */
 651         if (mgp->fw_ver_major == 1 && mgp->fw_ver_minor == 4 &&
 652             mgp->fw_ver_tiny >= 4 && mgp->fw_ver_tiny <= 11) {
 653                 mgp->adopted_rx_filter_bug = 1;
 654                 dev_warn(dev, "Adopting fw %d.%d.%d: "
 655                          "working around rx filter bug\n",
 656                          mgp->fw_ver_major, mgp->fw_ver_minor,
 657                          mgp->fw_ver_tiny);
 658         }
 659         return status;
 660 }
 661
 662 static int myri10ge_get_firmware_capabilities(struct myri10ge_priv *mgp)
 663 {
 664         struct myri10ge_cmd cmd;
 665         int status;
 666
 667         /* probe for IPv6 TSO support */
 668         mgp->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO;
 669         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_TSO6_HDR_SIZE,
 670                                    &cmd, 0);
 671         if (status == 0) {
 672                 mgp->max_tso6 = cmd.data0;
 673                 mgp->features |= NETIF_F_TSO6;
 674         }
 675
 676         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
 677         if (status != 0) {
 678                 dev_err(&mgp->pdev->dev,
 679                         "failed MXGEFW_CMD_GET_RX_RING_SIZE\n");
 680                 return -ENXIO;
 681         }
 682
 683         mgp->max_intr_slots = 2 * (cmd.data0 / sizeof(struct mcp_dma_addr));
 684
 685         return 0;
 686 }
 687
 688 static int myri10ge_load_firmware(struct myri10ge_priv *mgp, int adopt)
 689 {
 690         char __iomem *submit;
 691         __be32 buf[16] __attribute__ ((__aligned__(8)));
 692         u32 dma_low, dma_high, size;
 693         int status, i;
 694
 695         size = 0;
 696         status = myri10ge_load_hotplug_firmware(mgp, &size);
 697         if (status) {
 698                 if (!adopt)
 699                         return status;
 700                 dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n");
 701
 702                 /* Do not attempt to adopt firmware if there
 703                  * was a bad crc */
 704                 if (status == -EIO)
 705                         return status;
 706
 707                 status = myri10ge_adopt_running_firmware(mgp);
 708                 if (status != 0) {
 709                         dev_err(&mgp->pdev->dev,
 710                                 "failed to adopt running firmware\n");
 711                         return status;
 712                 }
 713                 dev_info(&mgp->pdev->dev,
 714                          "Successfully adopted running firmware\n");
 715                 if (mgp->tx_boundary == 4096) {
 716                         dev_warn(&mgp->pdev->dev,
 717                                  "Using firmware currently running on NIC"
 718                                  ".  For optimal\n");
 719                         dev_warn(&mgp->pdev->dev,
 720                                  "performance consider loading optimized "
 721                                  "firmware\n");
 722                         dev_warn(&mgp->pdev->dev, "via hotplug\n");
 723                 }
 724
 725                 mgp->fw_name = "adopted";
 726                 mgp->tx_boundary = 2048;
 727                 myri10ge_dummy_rdma(mgp, 1);
 728                 status = myri10ge_get_firmware_capabilities(mgp);
 729                 return status;
 730         }
 731
 732         /* clear confirmation addr */
 733         mgp->cmd->data = 0;
 734         mb();
 735
 736         /* send a reload command to the bootstrap MCP, and wait for the
 737          *  response in the confirmation address.  The firmware should
 738          * write a -1 there to indicate it is alive and well
 739          */
 740         dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus);
 741         dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus);
 742
 743         buf[0] = htonl(dma_high);       /* confirm addr MSW */
 744         buf[1] = htonl(dma_low);        /* confirm addr LSW */
 745         buf[2] = MYRI10GE_NO_CONFIRM_DATA;      /* confirm data */
 746
 747         /* FIX: All newest firmware should un-protect the bottom of
 748          * the sram before handoff. However, the very first interfaces
 749          * do not. Therefore the handoff copy must skip the first 8 bytes
 750          */
 751         buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */
 752         buf[4] = htonl(size - 8);       /* length of code */
 753         buf[5] = htonl(8);      /* where to copy to */
 754         buf[6] = htonl(0);      /* where to jump to */
 755
 756         submit = mgp->sram + MXGEFW_BOOT_HANDOFF;
 757
 758         myri10ge_pio_copy(submit, &buf, sizeof(buf));
 759         mb();
 760         msleep(1);
 761         mb();
 762         i = 0;
 763         while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 9) {
 764                 msleep(1 << i);
 765                 i++;
 766         }
 767         if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) {
 768                 dev_err(&mgp->pdev->dev, "handoff failed\n");
 769                 return -ENXIO;
 770         }
 771         myri10ge_dummy_rdma(mgp, 1);
 772         status = myri10ge_get_firmware_capabilities(mgp);
 773
 774         return status;
 775 }
 776
 777 static int myri10ge_update_mac_address(struct myri10ge_priv *mgp, u8 * addr)
 778 {
 779         struct myri10ge_cmd cmd;
 780         int status;
 781
 782         cmd.data0 = ((addr[0] << 24) | (addr[1] << 16)
 783                      | (addr[2] << 8) | addr[3]);
 784
 785         cmd.data1 = ((addr[4] << 8) | (addr[5]));
 786
 787         status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0);
 788         return status;
 789 }
 790
 791 static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause)
 792 {
 793         struct myri10ge_cmd cmd;
 794         int status, ctl;
 795
 796         ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL;
 797         status = myri10ge_send_cmd(mgp, ctl, &cmd, 0);
 798
 799         if (status) {
 800                 printk(KERN_ERR
 801                        "myri10ge: %s: Failed to set flow control mode\n",
 802                        mgp->dev->name);
 803                 return status;
 804         }
 805         mgp->pause = pause;
 806         return 0;
 807 }
 808
 809 static void
 810 myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic)
 811 {
 812         struct myri10ge_cmd cmd;
 813         int status, ctl;
 814
 815         ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC;
 816         status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic);
 817         if (status)
 818                 printk(KERN_ERR "myri10ge: %s: Failed to set promisc mode\n",
 819                        mgp->dev->name);
 820 }
 821
 822 static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type)
 823 {
 824         struct myri10ge_cmd cmd;
 825         int status;
 826         u32 len;
 827         struct page *dmatest_page;
 828         dma_addr_t dmatest_bus;
 829         char *test = " ";
 830
 831         dmatest_page = alloc_page(GFP_KERNEL);
 832         if (!dmatest_page)
 833                 return -ENOMEM;
 834         dmatest_bus = pci_map_page(mgp->pdev, dmatest_page, 0, PAGE_SIZE,
 835                                    DMA_BIDIRECTIONAL);
 836
 837         /* Run a small DMA test.
 838          * The magic multipliers to the length tell the firmware
 839          * to do DMA read, write, or read+write tests.  The
 840          * results are returned in cmd.data0.  The upper 16
 841          * bits or the return is the number of transfers completed.
 842          * The lower 16 bits is the time in 0.5us ticks that the
 843          * transfers took to complete.
 844          */
 845
 846         len = mgp->tx_boundary;
 847
 848         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
 849         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
 850         cmd.data2 = len * 0x10000;
 851         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
 852         if (status != 0) {
 853                 test = "read";
 854                 goto abort;
 855         }
 856         mgp->read_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
 857         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
 858         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
 859         cmd.data2 = len * 0x1;
 860         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
 861         if (status != 0) {
 862                 test = "write";
 863                 goto abort;
 864         }
 865         mgp->write_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff);
 866
 867         cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus);
 868         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus);
 869         cmd.data2 = len * 0x10001;
 870         status = myri10ge_send_cmd(mgp, test_type, &cmd, 0);
 871         if (status != 0) {
 872                 test = "read/write";
 873                 goto abort;
 874         }
 875         mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) /
 876             (cmd.data0 & 0xffff);
 877
 878 abort:
 879         pci_unmap_page(mgp->pdev, dmatest_bus, PAGE_SIZE, DMA_BIDIRECTIONAL);
 880         put_page(dmatest_page);
 881
 882         if (status != 0 && test_type != MXGEFW_CMD_UNALIGNED_TEST)
 883                 dev_warn(&mgp->pdev->dev, "DMA %s benchmark failed: %d\n",
 884                          test, status);
 885
 886         return status;
 887 }
 888
 889 static int myri10ge_reset(struct myri10ge_priv *mgp)
 890 {
 891         struct myri10ge_cmd cmd;
 892         struct myri10ge_slice_state *ss;
 893         int i, status;
 894         size_t bytes;
 895 #ifdef CONFIG_DCA
 896         unsigned long dca_tag_off;
 897 #endif
 898
 899         /* try to send a reset command to the card to see if it
 900          * is alive */
 901         memset(&cmd, 0, sizeof(cmd));
 902         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
 903         if (status != 0) {
 904                 dev_err(&mgp->pdev->dev, "failed reset\n");
 905                 return -ENXIO;
 906         }
 907
 908         (void)myri10ge_dma_test(mgp, MXGEFW_DMA_TEST);
 909         /*
 910          * Use non-ndis mcp_slot (eg, 4 bytes total,
 911          * no toeplitz hash value returned.  Older firmware will
 912          * not understand this command, but will use the correct
 913          * sized mcp_slot, so we ignore error returns
 914          */
 915         cmd.data0 = MXGEFW_RSS_MCP_SLOT_TYPE_MIN;
 916         (void)myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_MCP_SLOT_TYPE, &cmd, 0);
 917
 918         /* Now exchange information about interrupts  */
 919
 920         bytes = mgp->max_intr_slots * sizeof(*mgp->ss[0].rx_done.entry);
 921         cmd.data0 = (u32) bytes;
 922         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
 923
 924         /*
 925          * Even though we already know how many slices are supported
 926          * via myri10ge_probe_slices() MXGEFW_CMD_GET_MAX_RSS_QUEUES
 927          * has magic side effects, and must be called after a reset.
 928          * It must be called prior to calling any RSS related cmds,
 929          * including assigning an interrupt queue for anything but
 930          * slice 0.  It must also be called *after*
 931          * MXGEFW_CMD_SET_INTRQ_SIZE, since the intrq size is used by
 932          * the firmware to compute offsets.
 933          */
 934
 935         if (mgp->num_slices > 1) {
 936
 937                 /* ask the maximum number of slices it supports */
 938                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES,
 939                                            &cmd, 0);
 940                 if (status != 0) {
 941                         dev_err(&mgp->pdev->dev,
 942                                 "failed to get number of slices\n");
 943                 }
 944
 945                 /*
 946                  * MXGEFW_CMD_ENABLE_RSS_QUEUES must be called prior
 947                  * to setting up the interrupt queue DMA
 948                  */
 949
 950                 cmd.data0 = mgp->num_slices;
 951                 cmd.data1 = 1;  /* use MSI-X */
 952                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
 953                                            &cmd, 0);
 954                 if (status != 0) {
 955                         dev_err(&mgp->pdev->dev,
 956                                 "failed to set number of slices\n");
 957
 958                         return status;
 959                 }
 960         }
 961         for (i = 0; i < mgp->num_slices; i++) {
 962                 ss = &mgp->ss[i];
 963                 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->rx_done.bus);
 964                 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->rx_done.bus);
 965                 cmd.data2 = i;
 966                 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA,
 967                                             &cmd, 0);
 968         };
 969
 970         status |=
 971             myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0);
 972         for (i = 0; i < mgp->num_slices; i++) {
 973                 ss = &mgp->ss[i];
 974                 ss->irq_claim =
 975                     (__iomem __be32 *) (mgp->sram + cmd.data0 + 8 * i);
 976         }
 977         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET,
 978                                     &cmd, 0);
 979         mgp->irq_deassert = (__iomem __be32 *) (mgp->sram + cmd.data0);
 980
 981         status |= myri10ge_send_cmd
 982             (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0);
 983         mgp->intr_coal_delay_ptr = (__iomem __be32 *) (mgp->sram + cmd.data0);
 984         if (status != 0) {
 985                 dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n");
 986                 return status;
 987         }
 988         put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
 989
 990 #ifdef CONFIG_DCA
 991         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_DCA_OFFSET, &cmd, 0);
 992         dca_tag_off = cmd.data0;
 993         for (i = 0; i < mgp->num_slices; i++) {
 994                 ss = &mgp->ss[i];
 995                 if (status == 0) {
 996                         ss->dca_tag = (__iomem __be32 *)
 997                             (mgp->sram + dca_tag_off + 4 * i);
 998                 } else {
 999                         ss->dca_tag = NULL;
1000                 }
1001         }
1002 #endif                          /* CONFIG_DCA */
1003
1004         /* reset mcp/driver shared state back to 0 */
1005
1006         mgp->link_changes = 0;
1007         for (i = 0; i < mgp->num_slices; i++) {
1008                 ss = &mgp->ss[i];
1009
1010                 memset(ss->rx_done.entry, 0, bytes);
1011                 ss->tx.req = 0;
1012                 ss->tx.done = 0;
1013                 ss->tx.pkt_start = 0;
1014                 ss->tx.pkt_done = 0;
1015                 ss->rx_big.cnt = 0;
1016                 ss->rx_small.cnt = 0;
1017                 ss->rx_done.idx = 0;
1018                 ss->rx_done.cnt = 0;
1019                 ss->tx.wake_queue = 0;
1020                 ss->tx.stop_queue = 0;
1021         }
1022
1023         status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr);
1024         myri10ge_change_pause(mgp, mgp->pause);
1025         myri10ge_set_multicast_list(mgp->dev);
1026         return status;
1027 }
1028
1029 #ifdef CONFIG_DCA
1030 static void
1031 myri10ge_write_dca(struct myri10ge_slice_state *ss, int cpu, int tag)
1032 {
1033         ss->cpu = cpu;
1034         ss->cached_dca_tag = tag;
1035         put_be32(htonl(tag), ss->dca_tag);
1036 }
1037
1038 static inline void myri10ge_update_dca(struct myri10ge_slice_state *ss)
1039 {
1040         int cpu = get_cpu();
1041         int tag;
1042
1043         if (cpu != ss->cpu) {
1044                 tag = dca_get_tag(cpu);
1045                 if (ss->cached_dca_tag != tag)
1046                         myri10ge_write_dca(ss, cpu, tag);
1047         }
1048         put_cpu();
1049 }
1050
1051 static void myri10ge_setup_dca(struct myri10ge_priv *mgp)
1052 {
1053         int err, i;
1054         struct pci_dev *pdev = mgp->pdev;
1055
1056         if (mgp->ss[0].dca_tag == NULL || mgp->dca_enabled)
1057                 return;
1058         if (!myri10ge_dca) {
1059                 dev_err(&pdev->dev, "dca disabled by administrator\n");
1060                 return;
1061         }
1062         err = dca_add_requester(&pdev->dev);
1063         if (err) {
1064                 dev_err(&pdev->dev,
1065                         "dca_add_requester() failed, err=%d\n", err);
1066                 return;
1067         }
1068         mgp->dca_enabled = 1;
1069         for (i = 0; i < mgp->num_slices; i++)
1070                 myri10ge_write_dca(&mgp->ss[i], -1, 0);
1071 }
1072
1073 static void myri10ge_teardown_dca(struct myri10ge_priv *mgp)
1074 {
1075         struct pci_dev *pdev = mgp->pdev;
1076         int err;
1077
1078         if (!mgp->dca_enabled)
1079                 return;
1080         mgp->dca_enabled = 0;
1081         err = dca_remove_requester(&pdev->dev);
1082 }
1083
1084 static int myri10ge_notify_dca_device(struct device *dev, void *data)
1085 {
1086         struct myri10ge_priv *mgp;
1087         unsigned long event;
1088
1089         mgp = dev_get_drvdata(dev);
1090         event = *(unsigned long *)data;
1091
1092         if (event == DCA_PROVIDER_ADD)
1093                 myri10ge_setup_dca(mgp);
1094         else if (event == DCA_PROVIDER_REMOVE)
1095                 myri10ge_teardown_dca(mgp);
1096         return 0;
1097 }
1098 #endif                          /* CONFIG_DCA */
1099
1100 static inline void
1101 myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst,
1102                     struct mcp_kreq_ether_recv *src)
1103 {
1104         __be32 low;
1105
1106         low = src->addr_low;
1107         src->addr_low = htonl(DMA_32BIT_MASK);
1108         myri10ge_pio_copy(dst, src, 4 * sizeof(*src));
1109         mb();
1110         myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src));
1111         mb();
1112         src->addr_low = low;
1113         put_be32(low, &dst->addr_low);
1114         mb();
1115 }
1116
1117 static inline void myri10ge_vlan_ip_csum(struct sk_buff *skb, __wsum hw_csum)
1118 {
1119         struct vlan_hdr *vh = (struct vlan_hdr *)(skb->data);
1120
1121         if ((skb->protocol == htons(ETH_P_8021Q)) &&
1122             (vh->h_vlan_encapsulated_proto == htons(ETH_P_IP) ||
1123              vh->h_vlan_encapsulated_proto == htons(ETH_P_IPV6))) {
1124                 skb->csum = hw_csum;
1125                 skb->ip_summed = CHECKSUM_COMPLETE;
1126         }
1127 }
1128
1129 static inline void
1130 myri10ge_rx_skb_build(struct sk_buff *skb, u8 * va,
1131                       struct skb_frag_struct *rx_frags, int len, int hlen)
1132 {
1133         struct skb_frag_struct *skb_frags;
1134
1135         skb->len = skb->data_len = len;
1136         skb->truesize = len + sizeof(struct sk_buff);
1137         /* attach the page(s) */
1138
1139         skb_frags = skb_shinfo(skb)->frags;
1140         while (len > 0) {
1141                 memcpy(skb_frags, rx_frags, sizeof(*skb_frags));
1142                 len -= rx_frags->size;
1143                 skb_frags++;
1144                 rx_frags++;
1145                 skb_shinfo(skb)->nr_frags++;
1146         }
1147
1148         /* pskb_may_pull is not available in irq context, but
1149          * skb_pull() (for ether_pad and eth_type_trans()) requires
1150          * the beginning of the packet in skb_headlen(), move it
1151          * manually */
1152         skb_copy_to_linear_data(skb, va, hlen);
1153         skb_shinfo(skb)->frags[0].page_offset += hlen;
1154         skb_shinfo(skb)->frags[0].size -= hlen;
1155         skb->data_len -= hlen;
1156         skb->tail += hlen;
1157         skb_pull(skb, MXGEFW_PAD);
1158 }
1159
1160 static void
1161 myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx,
1162                         int bytes, int watchdog)
1163 {
1164         struct page *page;
1165         int idx;
1166
1167         if (unlikely(rx->watchdog_needed && !watchdog))
1168                 return;
1169
1170         /* try to refill entire ring */
1171         while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) {
1172                 idx = rx->fill_cnt & rx->mask;
1173                 if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) {
1174                         /* we can use part of previous page */
1175                         get_page(rx->page);
1176                 } else {
1177                         /* we need a new page */
1178                         page =
1179                             alloc_pages(GFP_ATOMIC | __GFP_COMP,
1180                                         MYRI10GE_ALLOC_ORDER);
1181                         if (unlikely(page == NULL)) {
1182                                 if (rx->fill_cnt - rx->cnt < 16)
1183                                         rx->watchdog_needed = 1;
1184                                 return;
1185                         }
1186                         rx->page = page;
1187                         rx->page_offset = 0;
1188                         rx->bus = pci_map_page(mgp->pdev, page, 0,
1189                                                MYRI10GE_ALLOC_SIZE,
1190                                                PCI_DMA_FROMDEVICE);
1191                 }
1192                 rx->info[idx].page = rx->page;
1193                 rx->info[idx].page_offset = rx->page_offset;
1194                 /* note that this is the address of the start of the
1195                  * page */
1196                 pci_unmap_addr_set(&rx->info[idx], bus, rx->bus);
1197                 rx->shadow[idx].addr_low =
1198                     htonl(MYRI10GE_LOWPART_TO_U32(rx->bus) + rx->page_offset);
1199                 rx->shadow[idx].addr_high =
1200                     htonl(MYRI10GE_HIGHPART_TO_U32(rx->bus));
1201
1202                 /* start next packet on a cacheline boundary */
1203                 rx->page_offset += SKB_DATA_ALIGN(bytes);
1204
1205 #if MYRI10GE_ALLOC_SIZE > 4096
1206                 /* don't cross a 4KB boundary */
1207                 if ((rx->page_offset >> 12) !=
1208                     ((rx->page_offset + bytes - 1) >> 12))
1209                         rx->page_offset = (rx->page_offset + 4096) & ~4095;
1210 #endif
1211                 rx->fill_cnt++;
1212
1213                 /* copy 8 descriptors to the firmware at a time */
1214                 if ((idx & 7) == 7) {
1215                         myri10ge_submit_8rx(&rx->lanai[idx - 7],
1216                                             &rx->shadow[idx - 7]);
1217                 }
1218         }
1219 }
1220
1221 static inline void
1222 myri10ge_unmap_rx_page(struct pci_dev *pdev,
1223                        struct myri10ge_rx_buffer_state *info, int bytes)
1224 {
1225         /* unmap the recvd page if we're the only or last user of it */
1226         if (bytes >= MYRI10GE_ALLOC_SIZE / 2 ||
1227             (info->page_offset + 2 * bytes) > MYRI10GE_ALLOC_SIZE) {
1228                 pci_unmap_page(pdev, (pci_unmap_addr(info, bus)
1229                                       & ~(MYRI10GE_ALLOC_SIZE - 1)),
1230                                MYRI10GE_ALLOC_SIZE, PCI_DMA_FROMDEVICE);
1231         }
1232 }
1233
1234 #define MYRI10GE_HLEN 64        /* The number of bytes to copy from a
1235                                  * page into an skb */
1236
1237 static inline int
1238 myri10ge_rx_done(struct myri10ge_slice_state *ss, struct myri10ge_rx_buf *rx,
1239                  int bytes, int len, __wsum csum)
1240 {
1241         struct myri10ge_priv *mgp = ss->mgp;
1242         struct sk_buff *skb;
1243         struct skb_frag_struct rx_frags[MYRI10GE_MAX_FRAGS_PER_FRAME];
1244         int i, idx, hlen, remainder;
1245         struct pci_dev *pdev = mgp->pdev;
1246         struct net_device *dev = mgp->dev;
1247         u8 *va;
1248
1249         len += MXGEFW_PAD;
1250         idx = rx->cnt & rx->mask;
1251         va = page_address(rx->info[idx].page) + rx->info[idx].page_offset;
1252         prefetch(va);
1253         /* Fill skb_frag_struct(s) with data from our receive */
1254         for (i = 0, remainder = len; remainder > 0; i++) {
1255                 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes);
1256                 rx_frags[i].page = rx->info[idx].page;
1257                 rx_frags[i].page_offset = rx->info[idx].page_offset;
1258                 if (remainder < MYRI10GE_ALLOC_SIZE)
1259                         rx_frags[i].size = remainder;
1260                 else
1261                         rx_frags[i].size = MYRI10GE_ALLOC_SIZE;
1262                 rx->cnt++;
1263                 idx = rx->cnt & rx->mask;
1264                 remainder -= MYRI10GE_ALLOC_SIZE;
1265         }
1266
1267         if (mgp->csum_flag && myri10ge_lro) {
1268                 rx_frags[0].page_offset += MXGEFW_PAD;
1269                 rx_frags[0].size -= MXGEFW_PAD;
1270                 len -= MXGEFW_PAD;
1271                 lro_receive_frags(&ss->rx_done.lro_mgr, rx_frags,
1272                                   /* opaque, will come back in get_frag_header */
1273                                   len, len,
1274                                   (void *)(__force unsigned long)csum, csum);
1275
1276                 return 1;
1277         }
1278
1279         hlen = MYRI10GE_HLEN > len ? len : MYRI10GE_HLEN;
1280
1281         /* allocate an skb to attach the page(s) to. This is done
1282          * after trying LRO, so as to avoid skb allocation overheads */
1283
1284         skb = netdev_alloc_skb(dev, MYRI10GE_HLEN + 16);
1285         if (unlikely(skb == NULL)) {
1286                 mgp->stats.rx_dropped++;
1287                 do {
1288                         i--;
1289                         put_page(rx_frags[i].page);
1290                 } while (i != 0);
1291                 return 0;
1292         }
1293
1294         /* Attach the pages to the skb, and trim off any padding */
1295         myri10ge_rx_skb_build(skb, va, rx_frags, len, hlen);
1296         if (skb_shinfo(skb)->frags[0].size <= 0) {
1297                 put_page(skb_shinfo(skb)->frags[0].page);
1298                 skb_shinfo(skb)->nr_frags = 0;
1299         }
1300         skb->protocol = eth_type_trans(skb, dev);
1301
1302         if (mgp->csum_flag) {
1303                 if ((skb->protocol == htons(ETH_P_IP)) ||
1304                     (skb->protocol == htons(ETH_P_IPV6))) {
1305                         skb->csum = csum;
1306                         skb->ip_summed = CHECKSUM_COMPLETE;
1307                 } else
1308                         myri10ge_vlan_ip_csum(skb, csum);
1309         }
1310         netif_receive_skb(skb);
1311         dev->last_rx = jiffies;
1312         return 1;
1313 }
1314
1315 static inline void
1316 myri10ge_tx_done(struct myri10ge_slice_state *ss, int mcp_index)
1317 {
1318         struct pci_dev *pdev = ss->mgp->pdev;
1319         struct myri10ge_tx_buf *tx = &ss->tx;
1320         struct sk_buff *skb;
1321         int idx, len;
1322
1323         while (tx->pkt_done != mcp_index) {
1324                 idx = tx->done & tx->mask;
1325                 skb = tx->info[idx].skb;
1326
1327                 /* Mark as free */
1328                 tx->info[idx].skb = NULL;
1329                 if (tx->info[idx].last) {
1330                         tx->pkt_done++;
1331                         tx->info[idx].last = 0;
1332                 }
1333                 tx->done++;
1334                 len = pci_unmap_len(&tx->info[idx], len);
1335                 pci_unmap_len_set(&tx->info[idx], len, 0);
1336                 if (skb) {
1337                         ss->stats.tx_bytes += skb->len;
1338                         ss->stats.tx_packets++;
1339                         dev_kfree_skb_irq(skb);
1340                         if (len)
1341                                 pci_unmap_single(pdev,
1342                                                  pci_unmap_addr(&tx->info[idx],
1343                                                                 bus), len,
1344                                                  PCI_DMA_TODEVICE);
1345                 } else {
1346                         if (len)
1347                                 pci_unmap_page(pdev,
1348                                                pci_unmap_addr(&tx->info[idx],
1349                                                               bus), len,
1350                                                PCI_DMA_TODEVICE);
1351                 }
1352         }
1353         /* start the queue if we've stopped it */
1354         if (netif_queue_stopped(ss->dev)
1355             && tx->req - tx->done < (tx->mask >> 1)) {
1356                 tx->wake_queue++;
1357                 netif_wake_queue(ss->dev);
1358         }
1359 }
1360
1361 static inline int
1362 myri10ge_clean_rx_done(struct myri10ge_slice_state *ss, int budget)
1363 {
1364         struct myri10ge_rx_done *rx_done = &ss->rx_done;
1365         struct myri10ge_priv *mgp = ss->mgp;
1366         unsigned long rx_bytes = 0;
1367         unsigned long rx_packets = 0;
1368         unsigned long rx_ok;
1369
1370         int idx = rx_done->idx;
1371         int cnt = rx_done->cnt;
1372         int work_done = 0;
1373         u16 length;
1374         __wsum checksum;
1375
1376         while (rx_done->entry[idx].length != 0 && work_done < budget) {
1377                 length = ntohs(rx_done->entry[idx].length);
1378                 rx_done->entry[idx].length = 0;
1379                 checksum = csum_unfold(rx_done->entry[idx].checksum);
1380                 if (length <= mgp->small_bytes)
1381                         rx_ok = myri10ge_rx_done(ss, &ss->rx_small,
1382                                                  mgp->small_bytes,
1383                                                  length, checksum);
1384                 else
1385                         rx_ok = myri10ge_rx_done(ss, &ss->rx_big,
1386                                                  mgp->big_bytes,
1387                                                  length, checksum);
1388                 rx_packets += rx_ok;
1389                 rx_bytes += rx_ok * (unsigned long)length;
1390                 cnt++;
1391                 idx = cnt & (mgp->max_intr_slots - 1);
1392                 work_done++;
1393         }
1394         rx_done->idx = idx;
1395         rx_done->cnt = cnt;
1396         ss->stats.rx_packets += rx_packets;
1397         ss->stats.rx_bytes += rx_bytes;
1398
1399         if (myri10ge_lro)
1400                 lro_flush_all(&rx_done->lro_mgr);
1401
1402         /* restock receive rings if needed */
1403         if (ss->rx_small.fill_cnt - ss->rx_small.cnt < myri10ge_fill_thresh)
1404                 myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
1405                                         mgp->small_bytes + MXGEFW_PAD, 0);
1406         if (ss->rx_big.fill_cnt - ss->rx_big.cnt < myri10ge_fill_thresh)
1407                 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
1408
1409         return work_done;
1410 }
1411
1412 static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
1413 {
1414         struct mcp_irq_data *stats = mgp->ss[0].fw_stats;
1415
1416         if (unlikely(stats->stats_updated)) {
1417                 unsigned link_up = ntohl(stats->link_up);
1418                 if (mgp->link_state != link_up) {
1419                         mgp->link_state = link_up;
1420
1421                         if (mgp->link_state == MXGEFW_LINK_UP) {
1422                                 if (netif_msg_link(mgp))
1423                                         printk(KERN_INFO
1424                                                "myri10ge: %s: link up\n",
1425                                                mgp->dev->name);
1426                                 netif_carrier_on(mgp->dev);
1427                                 mgp->link_changes++;
1428                         } else {
1429                                 if (netif_msg_link(mgp))
1430                                         printk(KERN_INFO
1431                                                "myri10ge: %s: link %s\n",
1432                                                mgp->dev->name,
1433                                                (link_up == MXGEFW_LINK_MYRINET ?
1434                                                 "mismatch (Myrinet detected)" :
1435                                                 "down"));
1436                                 netif_carrier_off(mgp->dev);
1437                                 mgp->link_changes++;
1438                         }
1439                 }
1440                 if (mgp->rdma_tags_available !=
1441                     ntohl(stats->rdma_tags_available)) {
1442                         mgp->rdma_tags_available =
1443                             ntohl(stats->rdma_tags_available);
1444                         printk(KERN_WARNING "myri10ge: %s: RDMA timed out! "
1445                                "%d tags left\n", mgp->dev->name,
1446                                mgp->rdma_tags_available);
1447                 }
1448                 mgp->down_cnt += stats->link_down;
1449                 if (stats->link_down)
1450                         wake_up(&mgp->down_wq);
1451         }
1452 }
1453
1454 static int myri10ge_poll(struct napi_struct *napi, int budget)
1455 {
1456         struct myri10ge_slice_state *ss =
1457             container_of(napi, struct myri10ge_slice_state, napi);
1458         struct net_device *netdev = ss->mgp->dev;
1459         int work_done;
1460
1461 #ifdef CONFIG_DCA
1462         if (ss->mgp->dca_enabled)
1463                 myri10ge_update_dca(ss);
1464 #endif
1465
1466         /* process as many rx events as NAPI will allow */
1467         work_done = myri10ge_clean_rx_done(ss, budget);
1468
1469         if (work_done < budget) {
1470                 netif_rx_complete(netdev, napi);
1471                 put_be32(htonl(3), ss->irq_claim);
1472         }
1473         return work_done;
1474 }
1475
1476 static irqreturn_t myri10ge_intr(int irq, void *arg)
1477 {
1478         struct myri10ge_slice_state *ss = arg;
1479         struct myri10ge_priv *mgp = ss->mgp;
1480         struct mcp_irq_data *stats = ss->fw_stats;
1481         struct myri10ge_tx_buf *tx = &ss->tx;
1482         u32 send_done_count;
1483         int i;
1484
1485         /* an interrupt on a non-zero slice is implicitly valid
1486          * since MSI-X irqs are not shared */
1487         if (ss != mgp->ss) {
1488                 netif_rx_schedule(ss->dev, &ss->napi);
1489                 return (IRQ_HANDLED);
1490         }
1491
1492         /* make sure it is our IRQ, and that the DMA has finished */
1493         if (unlikely(!stats->valid))
1494                 return (IRQ_NONE);
1495
1496         /* low bit indicates receives are present, so schedule
1497          * napi poll handler */
1498         if (stats->valid & 1)
1499                 netif_rx_schedule(ss->dev, &ss->napi);
1500
1501         if (!mgp->msi_enabled && !mgp->msix_enabled) {
1502                 put_be32(0, mgp->irq_deassert);
1503                 if (!myri10ge_deassert_wait)
1504                         stats->valid = 0;
1505                 mb();
1506         } else
1507                 stats->valid = 0;
1508
1509         /* Wait for IRQ line to go low, if using INTx */
1510         i = 0;
1511         while (1) {
1512                 i++;
1513                 /* check for transmit completes and receives */
1514                 send_done_count = ntohl(stats->send_done_count);
1515                 if (send_done_count != tx->pkt_done)
1516                         myri10ge_tx_done(ss, (int)send_done_count);
1517                 if (unlikely(i > myri10ge_max_irq_loops)) {
1518                         printk(KERN_WARNING "myri10ge: %s: irq stuck?\n",
1519                                mgp->dev->name);
1520                         stats->valid = 0;
1521                         schedule_work(&mgp->watchdog_work);
1522                 }
1523                 if (likely(stats->valid == 0))
1524                         break;
1525                 cpu_relax();
1526                 barrier();
1527         }
1528
1529         myri10ge_check_statblock(mgp);
1530
1531         put_be32(htonl(3), ss->irq_claim + 1);
1532         return (IRQ_HANDLED);
1533 }
1534
1535 static int
1536 myri10ge_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
1537 {
1538         struct myri10ge_priv *mgp = netdev_priv(netdev);
1539         char *ptr;
1540         int i;
1541
1542         cmd->autoneg = AUTONEG_DISABLE;
1543         cmd->speed = SPEED_10000;
1544         cmd->duplex = DUPLEX_FULL;
1545
1546         /*
1547          * parse the product code to deterimine the interface type
1548          * (CX4, XFP, Quad Ribbon Fiber) by looking at the character
1549          * after the 3rd dash in the driver's cached copy of the
1550          * EEPROM's product code string.
1551          */
1552         ptr = mgp->product_code_string;
1553         if (ptr == NULL) {
1554                 printk(KERN_ERR "myri10ge: %s: Missing product code\n",
1555                        netdev->name);
1556                 return 0;
1557         }
1558         for (i = 0; i < 3; i++, ptr++) {
1559                 ptr = strchr(ptr, '-');
1560                 if (ptr == NULL) {
1561                         printk(KERN_ERR "myri10ge: %s: Invalid product "
1562                                "code %s\n", netdev->name,
1563                                mgp->product_code_string);
1564                         return 0;
1565                 }
1566         }
1567         if (*ptr == 'R' || *ptr == 'Q') {
1568                 /* We've found either an XFP or quad ribbon fiber */
1569                 cmd->port = PORT_FIBRE;
1570         }
1571         return 0;
1572 }
1573
1574 static void
1575 myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
1576 {
1577         struct myri10ge_priv *mgp = netdev_priv(netdev);
1578
1579         strlcpy(info->driver, "myri10ge", sizeof(info->driver));
1580         strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version));
1581         strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version));
1582         strlcpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info));
1583 }
1584
1585 static int
1586 myri10ge_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1587 {
1588         struct myri10ge_priv *mgp = netdev_priv(netdev);
1589
1590         coal->rx_coalesce_usecs = mgp->intr_coal_delay;
1591         return 0;
1592 }
1593
1594 static int
1595 myri10ge_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal)
1596 {
1597         struct myri10ge_priv *mgp = netdev_priv(netdev);
1598
1599         mgp->intr_coal_delay = coal->rx_coalesce_usecs;
1600         put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr);
1601         return 0;
1602 }
1603
1604 static void
1605 myri10ge_get_pauseparam(struct net_device *netdev,
1606                         struct ethtool_pauseparam *pause)
1607 {
1608         struct myri10ge_priv *mgp = netdev_priv(netdev);
1609
1610         pause->autoneg = 0;
1611         pause->rx_pause = mgp->pause;
1612         pause->tx_pause = mgp->pause;
1613 }
1614
1615 static int
1616 myri10ge_set_pauseparam(struct net_device *netdev,
1617                         struct ethtool_pauseparam *pause)
1618 {
1619         struct myri10ge_priv *mgp = netdev_priv(netdev);
1620
1621         if (pause->tx_pause != mgp->pause)
1622                 return myri10ge_change_pause(mgp, pause->tx_pause);
1623         if (pause->rx_pause != mgp->pause)
1624                 return myri10ge_change_pause(mgp, pause->tx_pause);
1625         if (pause->autoneg != 0)
1626                 return -EINVAL;
1627         return 0;
1628 }
1629
1630 static void
1631 myri10ge_get_ringparam(struct net_device *netdev,
1632                        struct ethtool_ringparam *ring)
1633 {
1634         struct myri10ge_priv *mgp = netdev_priv(netdev);
1635
1636         ring->rx_mini_max_pending = mgp->ss[0].rx_small.mask + 1;
1637         ring->rx_max_pending = mgp->ss[0].rx_big.mask + 1;
1638         ring->rx_jumbo_max_pending = 0;
1639         ring->tx_max_pending = mgp->ss[0].rx_small.mask + 1;
1640         ring->rx_mini_pending = ring->rx_mini_max_pending;
1641         ring->rx_pending = ring->rx_max_pending;
1642         ring->rx_jumbo_pending = ring->rx_jumbo_max_pending;
1643         ring->tx_pending = ring->tx_max_pending;
1644 }
1645
1646 static u32 myri10ge_get_rx_csum(struct net_device *netdev)
1647 {
1648         struct myri10ge_priv *mgp = netdev_priv(netdev);
1649
1650         if (mgp->csum_flag)
1651                 return 1;
1652         else
1653                 return 0;
1654 }
1655
1656 static int myri10ge_set_rx_csum(struct net_device *netdev, u32 csum_enabled)
1657 {
1658         struct myri10ge_priv *mgp = netdev_priv(netdev);
1659
1660         if (csum_enabled)
1661                 mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
1662         else
1663                 mgp->csum_flag = 0;
1664         return 0;
1665 }
1666
1667 static int myri10ge_set_tso(struct net_device *netdev, u32 tso_enabled)
1668 {
1669         struct myri10ge_priv *mgp = netdev_priv(netdev);
1670         unsigned long flags = mgp->features & (NETIF_F_TSO6 | NETIF_F_TSO);
1671
1672         if (tso_enabled)
1673                 netdev->features |= flags;
1674         else
1675                 netdev->features &= ~flags;
1676         return 0;
1677 }
1678
1679 static const char myri10ge_gstrings_main_stats[][ETH_GSTRING_LEN] = {
1680         "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
1681         "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
1682         "rx_length_errors", "rx_over_errors", "rx_crc_errors",
1683         "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
1684         "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
1685         "tx_heartbeat_errors", "tx_window_errors",
1686         /* device-specific stats */
1687         "tx_boundary", "WC", "irq", "MSI", "MSIX",
1688         "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
1689         "serial_number", "watchdog_resets",
1690 #ifdef CONFIG_DCA
1691         "dca_capable", "dca_enabled",
1692 #endif
1693         "link_changes", "link_up", "dropped_link_overflow",
1694         "dropped_link_error_or_filtered",
1695         "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32",
1696         "dropped_unicast_filtered", "dropped_multicast_filtered",
1697         "dropped_runt", "dropped_overrun", "dropped_no_small_buffer",
1698         "dropped_no_big_buffer"
1699 };
1700
1701 static const char myri10ge_gstrings_slice_stats[][ETH_GSTRING_LEN] = {
1702         "----------- slice ---------",
1703         "tx_pkt_start", "tx_pkt_done", "tx_req", "tx_done",
1704         "rx_small_cnt", "rx_big_cnt",
1705         "wake_queue", "stop_queue", "tx_linearized", "LRO aggregated",
1706             "LRO flushed",
1707         "LRO avg aggr", "LRO no_desc"
1708 };
1709
1710 #define MYRI10GE_NET_STATS_LEN      21
1711 #define MYRI10GE_MAIN_STATS_LEN  ARRAY_SIZE(myri10ge_gstrings_main_stats)
1712 #define MYRI10GE_SLICE_STATS_LEN  ARRAY_SIZE(myri10ge_gstrings_slice_stats)
1713
1714 static void
1715 myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data)
1716 {
1717         struct myri10ge_priv *mgp = netdev_priv(netdev);
1718         int i;
1719
1720         switch (stringset) {
1721         case ETH_SS_STATS:
1722                 memcpy(data, *myri10ge_gstrings_main_stats,
1723                        sizeof(myri10ge_gstrings_main_stats));
1724                 data += sizeof(myri10ge_gstrings_main_stats);
1725                 for (i = 0; i < mgp->num_slices; i++) {
1726                         memcpy(data, *myri10ge_gstrings_slice_stats,
1727                                sizeof(myri10ge_gstrings_slice_stats));
1728                         data += sizeof(myri10ge_gstrings_slice_stats);
1729                 }
1730                 break;
1731         }
1732 }
1733
1734 static int myri10ge_get_sset_count(struct net_device *netdev, int sset)
1735 {
1736         struct myri10ge_priv *mgp = netdev_priv(netdev);
1737
1738         switch (sset) {
1739         case ETH_SS_STATS:
1740                 return MYRI10GE_MAIN_STATS_LEN +
1741                     mgp->num_slices * MYRI10GE_SLICE_STATS_LEN;
1742         default:
1743                 return -EOPNOTSUPP;
1744         }
1745 }
1746
1747 static void
1748 myri10ge_get_ethtool_stats(struct net_device *netdev,
1749                            struct ethtool_stats *stats, u64 * data)
1750 {
1751         struct myri10ge_priv *mgp = netdev_priv(netdev);
1752         struct myri10ge_slice_state *ss;
1753         int slice;
1754         int i;
1755
1756         for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++)
1757                 data[i] = ((unsigned long *)&mgp->stats)[i];
1758
1759         data[i++] = (unsigned int)mgp->tx_boundary;
1760         data[i++] = (unsigned int)mgp->wc_enabled;
1761         data[i++] = (unsigned int)mgp->pdev->irq;
1762         data[i++] = (unsigned int)mgp->msi_enabled;
1763         data[i++] = (unsigned int)mgp->msix_enabled;
1764         data[i++] = (unsigned int)mgp->read_dma;
1765         data[i++] = (unsigned int)mgp->write_dma;
1766         data[i++] = (unsigned int)mgp->read_write_dma;
1767         data[i++] = (unsigned int)mgp->serial_number;
1768         data[i++] = (unsigned int)mgp->watchdog_resets;
1769 #ifdef CONFIG_DCA
1770         data[i++] = (unsigned int)(mgp->ss[0].dca_tag != NULL);
1771         data[i++] = (unsigned int)(mgp->dca_enabled);
1772 #endif
1773         data[i++] = (unsigned int)mgp->link_changes;
1774
1775         /* firmware stats are useful only in the first slice */
1776         ss = &mgp->ss[0];
1777         data[i++] = (unsigned int)ntohl(ss->fw_stats->link_up);
1778         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_link_overflow);
1779         data[i++] =
1780             (unsigned int)ntohl(ss->fw_stats->dropped_link_error_or_filtered);
1781         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_pause);
1782         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_phy);
1783         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_crc32);
1784         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_unicast_filtered);
1785         data[i++] =
1786             (unsigned int)ntohl(ss->fw_stats->dropped_multicast_filtered);
1787         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_runt);
1788         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_overrun);
1789         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_small_buffer);
1790         data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_big_buffer);
1791
1792         for (slice = 0; slice < mgp->num_slices; slice++) {
1793                 ss = &mgp->ss[slice];
1794                 data[i++] = slice;
1795                 data[i++] = (unsigned int)ss->tx.pkt_start;
1796                 data[i++] = (unsigned int)ss->tx.pkt_done;
1797                 data[i++] = (unsigned int)ss->tx.req;
1798                 data[i++] = (unsigned int)ss->tx.done;
1799                 data[i++] = (unsigned int)ss->rx_small.cnt;
1800                 data[i++] = (unsigned int)ss->rx_big.cnt;
1801                 data[i++] = (unsigned int)ss->tx.wake_queue;
1802                 data[i++] = (unsigned int)ss->tx.stop_queue;
1803                 data[i++] = (unsigned int)ss->tx.linearized;
1804                 data[i++] = ss->rx_done.lro_mgr.stats.aggregated;
1805                 data[i++] = ss->rx_done.lro_mgr.stats.flushed;
1806                 if (ss->rx_done.lro_mgr.stats.flushed)
1807                         data[i++] = ss->rx_done.lro_mgr.stats.aggregated /
1808                             ss->rx_done.lro_mgr.stats.flushed;
1809                 else
1810                         data[i++] = 0;
1811                 data[i++] = ss->rx_done.lro_mgr.stats.no_desc;
1812         }
1813 }
1814
1815 static void myri10ge_set_msglevel(struct net_device *netdev, u32 value)
1816 {
1817         struct myri10ge_priv *mgp = netdev_priv(netdev);
1818         mgp->msg_enable = value;
1819 }
1820
1821 static u32 myri10ge_get_msglevel(struct net_device *netdev)
1822 {
1823         struct myri10ge_priv *mgp = netdev_priv(netdev);
1824         return mgp->msg_enable;
1825 }
1826
1827 static const struct ethtool_ops myri10ge_ethtool_ops = {
1828         .get_settings = myri10ge_get_settings,
1829         .get_drvinfo = myri10ge_get_drvinfo,
1830         .get_coalesce = myri10ge_get_coalesce,
1831         .set_coalesce = myri10ge_set_coalesce,
1832         .get_pauseparam = myri10ge_get_pauseparam,
1833         .set_pauseparam = myri10ge_set_pauseparam,
1834         .get_ringparam = myri10ge_get_ringparam,
1835         .get_rx_csum = myri10ge_get_rx_csum,
1836         .set_rx_csum = myri10ge_set_rx_csum,
1837         .set_tx_csum = ethtool_op_set_tx_hw_csum,
1838         .set_sg = ethtool_op_set_sg,
1839         .set_tso = myri10ge_set_tso,
1840         .get_link = ethtool_op_get_link,
1841         .get_strings = myri10ge_get_strings,
1842         .get_sset_count = myri10ge_get_sset_count,
1843         .get_ethtool_stats = myri10ge_get_ethtool_stats,
1844         .set_msglevel = myri10ge_set_msglevel,
1845         .get_msglevel = myri10ge_get_msglevel
1846 };
1847
1848 static int myri10ge_allocate_rings(struct myri10ge_slice_state *ss)
1849 {
1850         struct myri10ge_priv *mgp = ss->mgp;
1851         struct myri10ge_cmd cmd;
1852         struct net_device *dev = mgp->dev;
1853         int tx_ring_size, rx_ring_size;
1854         int tx_ring_entries, rx_ring_entries;
1855         int i, slice, status;
1856         size_t bytes;
1857
1858         /* get ring sizes */
1859         slice = ss - mgp->ss;
1860         cmd.data0 = slice;
1861         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0);
1862         tx_ring_size = cmd.data0;
1863         cmd.data0 = slice;
1864         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0);
1865         if (status != 0)
1866                 return status;
1867         rx_ring_size = cmd.data0;
1868
1869         tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send);
1870         rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr);
1871         ss->tx.mask = tx_ring_entries - 1;
1872         ss->rx_small.mask = ss->rx_big.mask = rx_ring_entries - 1;
1873
1874         status = -ENOMEM;
1875
1876         /* allocate the host shadow rings */
1877
1878         bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4)
1879             * sizeof(*ss->tx.req_list);
1880         ss->tx.req_bytes = kzalloc(bytes, GFP_KERNEL);
1881         if (ss->tx.req_bytes == NULL)
1882                 goto abort_with_nothing;
1883
1884         /* ensure req_list entries are aligned to 8 bytes */
1885         ss->tx.req_list = (struct mcp_kreq_ether_send *)
1886             ALIGN((unsigned long)ss->tx.req_bytes, 8);
1887
1888         bytes = rx_ring_entries * sizeof(*ss->rx_small.shadow);
1889         ss->rx_small.shadow = kzalloc(bytes, GFP_KERNEL);
1890         if (ss->rx_small.shadow == NULL)
1891                 goto abort_with_tx_req_bytes;
1892
1893         bytes = rx_ring_entries * sizeof(*ss->rx_big.shadow);
1894         ss->rx_big.shadow = kzalloc(bytes, GFP_KERNEL);
1895         if (ss->rx_big.shadow == NULL)
1896                 goto abort_with_rx_small_shadow;
1897
1898         /* allocate the host info rings */
1899
1900         bytes = tx_ring_entries * sizeof(*ss->tx.info);
1901         ss->tx.info = kzalloc(bytes, GFP_KERNEL);
1902         if (ss->tx.info == NULL)
1903                 goto abort_with_rx_big_shadow;
1904
1905         bytes = rx_ring_entries * sizeof(*ss->rx_small.info);
1906         ss->rx_small.info = kzalloc(bytes, GFP_KERNEL);
1907         if (ss->rx_small.info == NULL)
1908                 goto abort_with_tx_info;
1909
1910         bytes = rx_ring_entries * sizeof(*ss->rx_big.info);
1911         ss->rx_big.info = kzalloc(bytes, GFP_KERNEL);
1912         if (ss->rx_big.info == NULL)
1913                 goto abort_with_rx_small_info;
1914
1915         /* Fill the receive rings */
1916         ss->rx_big.cnt = 0;
1917         ss->rx_small.cnt = 0;
1918         ss->rx_big.fill_cnt = 0;
1919         ss->rx_small.fill_cnt = 0;
1920         ss->rx_small.page_offset = MYRI10GE_ALLOC_SIZE;
1921         ss->rx_big.page_offset = MYRI10GE_ALLOC_SIZE;
1922         ss->rx_small.watchdog_needed = 0;
1923         ss->rx_big.watchdog_needed = 0;
1924         myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
1925                                 mgp->small_bytes + MXGEFW_PAD, 0);
1926
1927         if (ss->rx_small.fill_cnt < ss->rx_small.mask + 1) {
1928                 printk(KERN_ERR
1929                        "myri10ge: %s:slice-%d: alloced only %d small bufs\n",
1930                        dev->name, slice, ss->rx_small.fill_cnt);
1931                 goto abort_with_rx_small_ring;
1932         }
1933
1934         myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0);
1935         if (ss->rx_big.fill_cnt < ss->rx_big.mask + 1) {
1936                 printk(KERN_ERR
1937                        "myri10ge: %s:slice-%d: alloced only %d big bufs\n",
1938                        dev->name, slice, ss->rx_big.fill_cnt);
1939                 goto abort_with_rx_big_ring;
1940         }
1941
1942         return 0;
1943
1944 abort_with_rx_big_ring:
1945         for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
1946                 int idx = i & ss->rx_big.mask;
1947                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
1948                                        mgp->big_bytes);
1949                 put_page(ss->rx_big.info[idx].page);
1950         }
1951
1952 abort_with_rx_small_ring:
1953         for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
1954                 int idx = i & ss->rx_small.mask;
1955                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
1956                                        mgp->small_bytes + MXGEFW_PAD);
1957                 put_page(ss->rx_small.info[idx].page);
1958         }
1959
1960         kfree(ss->rx_big.info);
1961
1962 abort_with_rx_small_info:
1963         kfree(ss->rx_small.info);
1964
1965 abort_with_tx_info:
1966         kfree(ss->tx.info);
1967
1968 abort_with_rx_big_shadow:
1969         kfree(ss->rx_big.shadow);
1970
1971 abort_with_rx_small_shadow:
1972         kfree(ss->rx_small.shadow);
1973
1974 abort_with_tx_req_bytes:
1975         kfree(ss->tx.req_bytes);
1976         ss->tx.req_bytes = NULL;
1977         ss->tx.req_list = NULL;
1978
1979 abort_with_nothing:
1980         return status;
1981 }
1982
1983 static void myri10ge_free_rings(struct myri10ge_slice_state *ss)
1984 {
1985         struct myri10ge_priv *mgp = ss->mgp;
1986         struct sk_buff *skb;
1987         struct myri10ge_tx_buf *tx;
1988         int i, len, idx;
1989
1990         /* If not allocated, skip it */
1991         if (ss->tx.req_list == NULL)
1992                 return;
1993
1994         for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) {
1995                 idx = i & ss->rx_big.mask;
1996                 if (i == ss->rx_big.fill_cnt - 1)
1997                         ss->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE;
1998                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx],
1999                                        mgp->big_bytes);
2000                 put_page(ss->rx_big.info[idx].page);
2001         }
2002
2003         for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) {
2004                 idx = i & ss->rx_small.mask;
2005                 if (i == ss->rx_small.fill_cnt - 1)
2006                         ss->rx_small.info[idx].page_offset =
2007                             MYRI10GE_ALLOC_SIZE;
2008                 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx],
2009                                        mgp->small_bytes + MXGEFW_PAD);
2010                 put_page(ss->rx_small.info[idx].page);
2011         }
2012         tx = &ss->tx;
2013         while (tx->done != tx->req) {
2014                 idx = tx->done & tx->mask;
2015                 skb = tx->info[idx].skb;
2016
2017                 /* Mark as free */
2018                 tx->info[idx].skb = NULL;
2019                 tx->done++;
2020                 len = pci_unmap_len(&tx->info[idx], len);
2021                 pci_unmap_len_set(&tx->info[idx], len, 0);
2022                 if (skb) {
2023                         ss->stats.tx_dropped++;
2024                         dev_kfree_skb_any(skb);
2025                         if (len)
2026                                 pci_unmap_single(mgp->pdev,
2027                                                  pci_unmap_addr(&tx->info[idx],
2028                                                                 bus), len,
2029                                                  PCI_DMA_TODEVICE);
2030                 } else {
2031                         if (len)
2032                                 pci_unmap_page(mgp->pdev,
2033                                                pci_unmap_addr(&tx->info[idx],
2034                                                               bus), len,
2035                                                PCI_DMA_TODEVICE);
2036                 }
2037         }
2038         kfree(ss->rx_big.info);
2039
2040         kfree(ss->rx_small.info);
2041
2042         kfree(ss->tx.info);
2043
2044         kfree(ss->rx_big.shadow);
2045
2046         kfree(ss->rx_small.shadow);
2047
2048         kfree(ss->tx.req_bytes);
2049         ss->tx.req_bytes = NULL;
2050         ss->tx.req_list = NULL;
2051 }
2052
2053 static int myri10ge_request_irq(struct myri10ge_priv *mgp)
2054 {
2055         struct pci_dev *pdev = mgp->pdev;
2056         struct myri10ge_slice_state *ss;
2057         struct net_device *netdev = mgp->dev;
2058         int i;
2059         int status;
2060
2061         mgp->msi_enabled = 0;
2062         mgp->msix_enabled = 0;
2063         status = 0;
2064         if (myri10ge_msi) {
2065                 if (mgp->num_slices > 1) {
2066                         status =
2067                             pci_enable_msix(pdev, mgp->msix_vectors,
2068                                             mgp->num_slices);
2069                         if (status == 0) {
2070                                 mgp->msix_enabled = 1;
2071                         } else {
2072                                 dev_err(&pdev->dev,
2073                                         "Error %d setting up MSI-X\n", status);
2074                                 return status;
2075                         }
2076                 }
2077                 if (mgp->msix_enabled == 0) {
2078                         status = pci_enable_msi(pdev);
2079                         if (status != 0) {
2080                                 dev_err(&pdev->dev,
2081                                         "Error %d setting up MSI; falling back to xPIC\n",
2082                                         status);
2083                         } else {
2084                                 mgp->msi_enabled = 1;
2085                         }
2086                 }
2087         }
2088         if (mgp->msix_enabled) {
2089                 for (i = 0; i < mgp->num_slices; i++) {
2090                         ss = &mgp->ss[i];
2091                         snprintf(ss->irq_desc, sizeof(ss->irq_desc),
2092                                  "%s:slice-%d", netdev->name, i);
2093                         status = request_irq(mgp->msix_vectors[i].vector,
2094                                              myri10ge_intr, 0, ss->irq_desc,
2095                                              ss);
2096                         if (status != 0) {
2097                                 dev_err(&pdev->dev,
2098                                         "slice %d failed to allocate IRQ\n", i);
2099                                 i--;
2100                                 while (i >= 0) {
2101                                         free_irq(mgp->msix_vectors[i].vector,
2102                                                  &mgp->ss[i]);
2103                                         i--;
2104                                 }
2105                                 pci_disable_msix(pdev);
2106                                 return status;
2107                         }
2108                 }
2109         } else {
2110                 status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED,
2111                                      mgp->dev->name, &mgp->ss[0]);
2112                 if (status != 0) {
2113                         dev_err(&pdev->dev, "failed to allocate IRQ\n");
2114                         if (mgp->msi_enabled)
2115                                 pci_disable_msi(pdev);
2116                 }
2117         }
2118         return status;
2119 }
2120
2121 static void myri10ge_free_irq(struct myri10ge_priv *mgp)
2122 {
2123         struct pci_dev *pdev = mgp->pdev;
2124         int i;
2125
2126         if (mgp->msix_enabled) {
2127                 for (i = 0; i < mgp->num_slices; i++)
2128                         free_irq(mgp->msix_vectors[i].vector, &mgp->ss[i]);
2129         } else {
2130                 free_irq(pdev->irq, &mgp->ss[0]);
2131         }
2132         if (mgp->msi_enabled)
2133                 pci_disable_msi(pdev);
2134         if (mgp->msix_enabled)
2135                 pci_disable_msix(pdev);
2136 }
2137
2138 static int
2139 myri10ge_get_frag_header(struct skb_frag_struct *frag, void **mac_hdr,
2140                          void **ip_hdr, void **tcpudp_hdr,
2141                          u64 * hdr_flags, void *priv)
2142 {
2143         struct ethhdr *eh;
2144         struct vlan_ethhdr *veh;
2145         struct iphdr *iph;
2146         u8 *va = page_address(frag->page) + frag->page_offset;
2147         unsigned long ll_hlen;
2148         /* passed opaque through lro_receive_frags() */
2149         __wsum csum = (__force __wsum) (unsigned long)priv;
2150
2151         /* find the mac header, aborting if not IPv4 */
2152
2153         eh = (struct ethhdr *)va;
2154         *mac_hdr = eh;
2155         ll_hlen = ETH_HLEN;
2156         if (eh->h_proto != htons(ETH_P_IP)) {
2157                 if (eh->h_proto == htons(ETH_P_8021Q)) {
2158                         veh = (struct vlan_ethhdr *)va;
2159                         if (veh->h_vlan_encapsulated_proto != htons(ETH_P_IP))
2160                                 return -1;
2161
2162                         ll_hlen += VLAN_HLEN;
2163
2164                         /*
2165                          *  HW checksum starts ETH_HLEN bytes into
2166                          *  frame, so we must subtract off the VLAN
2167                          *  header's checksum before csum can be used
2168                          */
2169                         csum = csum_sub(csum, csum_partial(va + ETH_HLEN,
2170                                                            VLAN_HLEN, 0));
2171                 } else {
2172                         return -1;
2173                 }
2174         }
2175         *hdr_flags = LRO_IPV4;
2176
2177         iph = (struct iphdr *)(va + ll_hlen);
2178         *ip_hdr = iph;
2179         if (iph->protocol != IPPROTO_TCP)
2180                 return -1;
2181         *hdr_flags |= LRO_TCP;
2182         *tcpudp_hdr = (u8 *) (*ip_hdr) + (iph->ihl << 2);
2183
2184         /* verify the IP checksum */
2185         if (unlikely(ip_fast_csum((u8 *) iph, iph->ihl)))
2186                 return -1;
2187
2188         /* verify the  checksum */
2189         if (unlikely(csum_tcpudp_magic(iph->saddr, iph->daddr,
2190                                        ntohs(iph->tot_len) - (iph->ihl << 2),
2191                                        IPPROTO_TCP, csum)))
2192                 return -1;
2193
2194         return 0;
2195 }
2196
2197 static int myri10ge_get_txrx(struct myri10ge_priv *mgp, int slice)
2198 {
2199         struct myri10ge_cmd cmd;
2200         struct myri10ge_slice_state *ss;
2201         int status;
2202
2203         ss = &mgp->ss[slice];
2204         cmd.data0 = 0;          /* single slice for now */
2205         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET, &cmd, 0);
2206         ss->tx.lanai = (struct mcp_kreq_ether_send __iomem *)
2207             (mgp->sram + cmd.data0);
2208
2209         cmd.data0 = slice;
2210         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET,
2211                                     &cmd, 0);
2212         ss->rx_small.lanai = (struct mcp_kreq_ether_recv __iomem *)
2213             (mgp->sram + cmd.data0);
2214
2215         cmd.data0 = slice;
2216         status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0);
2217         ss->rx_big.lanai = (struct mcp_kreq_ether_recv __iomem *)
2218             (mgp->sram + cmd.data0);
2219
2220         return status;
2221
2222 }
2223
2224 static int myri10ge_set_stats(struct myri10ge_priv *mgp, int slice)
2225 {
2226         struct myri10ge_cmd cmd;
2227         struct myri10ge_slice_state *ss;
2228         int status;
2229
2230         ss = &mgp->ss[slice];
2231         cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->fw_stats_bus);
2232         cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->fw_stats_bus);
2233         cmd.data2 = sizeof(struct mcp_irq_data);
2234         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0);
2235         if (status == -ENOSYS) {
2236                 dma_addr_t bus = ss->fw_stats_bus;
2237                 if (slice != 0)
2238                         return -EINVAL;
2239                 bus += offsetof(struct mcp_irq_data, send_done_count);
2240                 cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus);
2241                 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus);
2242                 status = myri10ge_send_cmd(mgp,
2243                                            MXGEFW_CMD_SET_STATS_DMA_OBSOLETE,
2244                                            &cmd, 0);
2245                 /* Firmware cannot support multicast without STATS_DMA_V2 */
2246                 mgp->fw_multicast_support = 0;
2247         } else {
2248                 mgp->fw_multicast_support = 1;
2249         }
2250         return 0;
2251 }
2252
2253 static int myri10ge_open(struct net_device *dev)
2254 {
2255         struct myri10ge_slice_state *ss;
2256         struct myri10ge_priv *mgp = netdev_priv(dev);
2257         struct myri10ge_cmd cmd;
2258         int i, status, big_pow2, slice;
2259         u8 *itable;
2260         struct net_lro_mgr *lro_mgr;
2261
2262         if (mgp->running != MYRI10GE_ETH_STOPPED)
2263                 return -EBUSY;
2264
2265         mgp->running = MYRI10GE_ETH_STARTING;
2266         status = myri10ge_reset(mgp);
2267         if (status != 0) {
2268                 printk(KERN_ERR "myri10ge: %s: failed reset\n", dev->name);
2269                 goto abort_with_nothing;
2270         }
2271
2272         if (mgp->num_slices > 1) {
2273                 cmd.data0 = mgp->num_slices;
2274                 cmd.data1 = 1;  /* use MSI-X */
2275                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES,
2276                                            &cmd, 0);
2277                 if (status != 0) {
2278                         printk(KERN_ERR
2279                                "myri10ge: %s: failed to set number of slices\n",
2280                                dev->name);
2281                         goto abort_with_nothing;
2282                 }
2283                 /* setup the indirection table */
2284                 cmd.data0 = mgp->num_slices;
2285                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_TABLE_SIZE,
2286                                            &cmd, 0);
2287
2288                 status |= myri10ge_send_cmd(mgp,
2289                                             MXGEFW_CMD_GET_RSS_TABLE_OFFSET,
2290                                             &cmd, 0);
2291                 if (status != 0) {
2292                         printk(KERN_ERR
2293                                "myri10ge: %s: failed to setup rss tables\n",
2294                                dev->name);
2295                 }
2296
2297                 /* just enable an identity mapping */
2298                 itable = mgp->sram + cmd.data0;
2299                 for (i = 0; i < mgp->num_slices; i++)
2300                         __raw_writeb(i, &itable[i]);
2301
2302                 cmd.data0 = 1;
2303                 cmd.data1 = myri10ge_rss_hash;
2304                 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_ENABLE,
2305                                            &cmd, 0);
2306                 if (status != 0) {
2307                         printk(KERN_ERR
2308                                "myri10ge: %s: failed to enable slices\n",
2309                                dev->name);
2310                         goto abort_with_nothing;
2311                 }
2312         }
2313
2314         status = myri10ge_request_irq(mgp);
2315         if (status != 0)
2316                 goto abort_with_nothing;
2317
2318         /* decide what small buffer size to use.  For good TCP rx
2319          * performance, it is important to not receive 1514 byte
2320          * frames into jumbo buffers, as it confuses the socket buffer
2321          * accounting code, leading to drops and erratic performance.
2322          */
2323
2324         if (dev->mtu <= ETH_DATA_LEN)
2325                 /* enough for a TCP header */
2326                 mgp->small_bytes = (128 > SMP_CACHE_BYTES)
2327                     ? (128 - MXGEFW_PAD)
2328                     : (SMP_CACHE_BYTES - MXGEFW_PAD);
2329         else
2330                 /* enough for a vlan encapsulated ETH_DATA_LEN frame */
2331                 mgp->small_bytes = VLAN_ETH_FRAME_LEN;
2332
2333         /* Override the small buffer size? */
2334         if (myri10ge_small_bytes > 0)
2335                 mgp->small_bytes = myri10ge_small_bytes;
2336
2337         /* Firmware needs the big buff size as a power of 2.  Lie and
2338          * tell him the buffer is larger, because we only use 1
2339          * buffer/pkt, and the mtu will prevent overruns.
2340          */
2341         big_pow2 = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2342         if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) {
2343                 while (!is_power_of_2(big_pow2))
2344                         big_pow2++;
2345                 mgp->big_bytes = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD;
2346         } else {
2347                 big_pow2 = MYRI10GE_ALLOC_SIZE;
2348                 mgp->big_bytes = big_pow2;
2349         }
2350
2351         /* setup the per-slice data structures */
2352         for (slice = 0; slice < mgp->num_slices; slice++) {
2353                 ss = &mgp->ss[slice];
2354
2355                 status = myri10ge_get_txrx(mgp, slice);
2356                 if (status != 0) {
2357                         printk(KERN_ERR
2358                                "myri10ge: %s: failed to get ring sizes or locations\n",
2359                                dev->name);
2360                         goto abort_with_rings;
2361                 }
2362                 status = myri10ge_allocate_rings(ss);
2363                 if (status != 0)
2364                         goto abort_with_rings;
2365                 if (slice == 0)
2366                         status = myri10ge_set_stats(mgp, slice);
2367                 if (status) {
2368                         printk(KERN_ERR
2369                                "myri10ge: %s: Couldn't set stats DMA\n",
2370                                dev->name);
2371                         goto abort_with_rings;
2372                 }
2373
2374                 lro_mgr = &ss->rx_done.lro_mgr;
2375                 lro_mgr->dev = dev;
2376                 lro_mgr->features = LRO_F_NAPI;
2377                 lro_mgr->ip_summed = CHECKSUM_COMPLETE;
2378                 lro_mgr->ip_summed_aggr = CHECKSUM_UNNECESSARY;
2379                 lro_mgr->max_desc = MYRI10GE_MAX_LRO_DESCRIPTORS;
2380                 lro_mgr->lro_arr = ss->rx_done.lro_desc;
2381                 lro_mgr->get_frag_header = myri10ge_get_frag_header;
2382                 lro_mgr->max_aggr = myri10ge_lro_max_pkts;
2383                 if (lro_mgr->max_aggr > MAX_SKB_FRAGS)
2384                         lro_mgr->max_aggr = MAX_SKB_FRAGS;
2385
2386                 /* must happen prior to any irq */
2387                 napi_enable(&(ss)->napi);
2388         }
2389
2390         /* now give firmware buffers sizes, and MTU */
2391         cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
2392         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0);
2393         cmd.data0 = mgp->small_bytes;
2394         status |=
2395             myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0);
2396         cmd.data0 = big_pow2;
2397         status |=
2398             myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0);
2399         if (status) {
2400                 printk(KERN_ERR "myri10ge: %s: Couldn't set buffer sizes\n",
2401                        dev->name);
2402                 goto abort_with_rings;
2403         }
2404
2405         /*
2406          * Set Linux style TSO mode; this is needed only on newer
2407          *  firmware versions.  Older versions default to Linux
2408          *  style TSO
2409          */
2410         cmd.data0 = 0;
2411         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_TSO_MODE, &cmd, 0);
2412         if (status && status != -ENOSYS) {
2413                 printk(KERN_ERR "myri10ge: %s: Couldn't set TSO mode\n",
2414                        dev->name);
2415                 goto abort_with_rings;
2416         }
2417
2418         mgp->link_state = ~0U;
2419         mgp->rdma_tags_available = 15;
2420
2421         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0);
2422         if (status) {
2423                 printk(KERN_ERR "myri10ge: %s: Couldn't bring up link\n",
2424                        dev->name);
2425                 goto abort_with_rings;
2426         }
2427
2428         mgp->running = MYRI10GE_ETH_RUNNING;
2429         mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ;
2430         add_timer(&mgp->watchdog_timer);
2431         netif_wake_queue(dev);
2432         return 0;
2433
2434 abort_with_rings:
2435         for (i = 0; i < mgp->num_slices; i++)
2436                 myri10ge_free_rings(&mgp->ss[i]);
2437
2438         myri10ge_free_irq(mgp);
2439
2440 abort_with_nothing:
2441         mgp->running = MYRI10GE_ETH_STOPPED;
2442         return -ENOMEM;
2443 }
2444
2445 static int myri10ge_close(struct net_device *dev)
2446 {
2447         struct myri10ge_priv *mgp = netdev_priv(dev);
2448         struct myri10ge_cmd cmd;
2449         int status, old_down_cnt;
2450         int i;
2451
2452         if (mgp->running != MYRI10GE_ETH_RUNNING)
2453                 return 0;
2454
2455         if (mgp->ss[0].tx.req_bytes == NULL)
2456                 return 0;
2457
2458         del_timer_sync(&mgp->watchdog_timer);
2459         mgp->running = MYRI10GE_ETH_STOPPING;
2460         for (i = 0; i < mgp->num_slices; i++) {
2461                 napi_disable(&mgp->ss[i].napi);
2462         }
2463         netif_carrier_off(dev);
2464         netif_stop_queue(dev);
2465         old_down_cnt = mgp->down_cnt;
2466         mb();
2467         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0);
2468         if (status)
2469                 printk(KERN_ERR "myri10ge: %s: Couldn't bring down link\n",
2470                        dev->name);
2471
2472         wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt, HZ);
2473         if (old_down_cnt == mgp->down_cnt)
2474                 printk(KERN_ERR "myri10ge: %s never got down irq\n", dev->name);
2475
2476         netif_tx_disable(dev);
2477         myri10ge_free_irq(mgp);
2478         for (i = 0; i < mgp->num_slices; i++)
2479                 myri10ge_free_rings(&mgp->ss[i]);
2480
2481         mgp->running = MYRI10GE_ETH_STOPPED;
2482         return 0;
2483 }
2484
2485 /* copy an array of struct mcp_kreq_ether_send's to the mcp.  Copy
2486  * backwards one at a time and handle ring wraps */
2487
2488 static inline void
2489 myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx,
2490                               struct mcp_kreq_ether_send *src, int cnt)
2491 {
2492         int idx, starting_slot;
2493         starting_slot = tx->req;
2494         while (cnt > 1) {
2495                 cnt--;
2496                 idx = (starting_slot + cnt) & tx->mask;
2497                 myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src));
2498                 mb();
2499         }
2500 }
2501
2502 /*
2503  * copy an array of struct mcp_kreq_ether_send's to the mcp.  Copy
2504  * at most 32 bytes at a time, so as to avoid involving the software
2505  * pio handler in the nic.   We re-write the first segment's flags
2506  * to mark them valid only after writing the entire chain.
2507  */
2508
2509 static inline void
2510 myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src,
2511                     int cnt)
2512 {
2513         int idx, i;
2514         struct mcp_kreq_ether_send __iomem *dstp, *dst;
2515         struct mcp_kreq_ether_send *srcp;
2516         u8 last_flags;
2517
2518         idx = tx->req & tx->mask;
2519
2520         last_flags = src->flags;
2521         src->flags = 0;
2522         mb();
2523         dst = dstp = &tx->lanai[idx];
2524         srcp = src;
2525
2526         if ((idx + cnt) < tx->mask) {
2527                 for (i = 0; i < (cnt - 1); i += 2) {
2528                         myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src));
2529                         mb();   /* force write every 32 bytes */
2530                         srcp += 2;
2531                         dstp += 2;
2532                 }
2533         } else {
2534                 /* submit all but the first request, and ensure
2535                  * that it is submitted below */
2536                 myri10ge_submit_req_backwards(tx, src, cnt);
2537                 i = 0;
2538         }
2539         if (i < cnt) {
2540                 /* submit the first request */
2541                 myri10ge_pio_copy(dstp, srcp, sizeof(*src));
2542                 mb();           /* barrier before setting valid flag */
2543         }
2544
2545         /* re-write the last 32-bits with the valid flags */
2546         src->flags = last_flags;
2547         put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3);
2548         tx->req += cnt;
2549         mb();
2550 }
2551
2552 /*
2553  * Transmit a packet.  We need to split the packet so that a single
2554  * segment does not cross myri10ge->tx_boundary, so this makes segment
2555  * counting tricky.  So rather than try to count segments up front, we
2556  * just give up if there are too few segments to hold a reasonably
2557  * fragmented packet currently available.  If we run
2558  * out of segments while preparing a packet for DMA, we just linearize
2559  * it and try again.
2560  */
2561
2562 static int myri10ge_xmit(struct sk_buff *skb, struct net_device *dev)
2563 {
2564         struct myri10ge_priv *mgp = netdev_priv(dev);
2565         struct myri10ge_slice_state *ss;
2566         struct mcp_kreq_ether_send *req;
2567         struct myri10ge_tx_buf *tx;
2568         struct skb_frag_struct *frag;
2569         dma_addr_t bus;
2570         u32 low;
2571         __be32 high_swapped;
2572         unsigned int len;
2573         int idx, last_idx, avail, frag_cnt, frag_idx, count, mss, max_segments;
2574         u16 pseudo_hdr_offset, cksum_offset;
2575         int cum_len, seglen, boundary, rdma_count;
2576         u8 flags, odd_flag;
2577
2578         /* always transmit through slot 0 */
2579         ss = mgp->ss;
2580         tx = &ss->tx;
2581 again:
2582         req = tx->req_list;
2583         avail = tx->mask - 1 - (tx->req - tx->done);
2584
2585         mss = 0;
2586         max_segments = MXGEFW_MAX_SEND_DESC;
2587
2588         if (skb_is_gso(skb)) {
2589                 mss = skb_shinfo(skb)->gso_size;
2590                 max_segments = MYRI10GE_MAX_SEND_DESC_TSO;
2591         }
2592
2593         if ((unlikely(avail < max_segments))) {
2594                 /* we are out of transmit resources */
2595                 tx->stop_queue++;
2596                 netif_stop_queue(dev);
2597                 return 1;
2598         }
2599
2600         /* Setup checksum offloading, if needed */
2601         cksum_offset = 0;
2602         pseudo_hdr_offset = 0;
2603         odd_flag = 0;
2604         flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
2605         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2606                 cksum_offset = skb_transport_offset(skb);
2607                 pseudo_hdr_offset = cksum_offset + skb->csum_offset;
2608                 /* If the headers are excessively large, then we must
2609                  * fall back to a software checksum */
2610                 if (unlikely(!mss && (cksum_offset > 255 ||
2611                                       pseudo_hdr_offset > 127))) {
2612                         if (skb_checksum_help(skb))
2613                                 goto drop;
2614                         cksum_offset = 0;
2615                         pseudo_hdr_offset = 0;
2616                 } else {
2617                         odd_flag = MXGEFW_FLAGS_ALIGN_ODD;
2618                         flags |= MXGEFW_FLAGS_CKSUM;
2619                 }
2620         }
2621
2622         cum_len = 0;
2623
2624         if (mss) {              /* TSO */
2625                 /* this removes any CKSUM flag from before */
2626                 flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST);
2627
2628                 /* negative cum_len signifies to the
2629                  * send loop that we are still in the
2630                  * header portion of the TSO packet.
2631                  * TSO header can be at most 1KB long */
2632                 cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb));
2633
2634                 /* for IPv6 TSO, the checksum offset stores the
2635                  * TCP header length, to save the firmware from
2636                  * the need to parse the headers */
2637                 if (skb_is_gso_v6(skb)) {
2638                         cksum_offset = tcp_hdrlen(skb);
2639                         /* Can only handle headers <= max_tso6 long */
2640                         if (unlikely(-cum_len > mgp->max_tso6))
2641                                 return myri10ge_sw_tso(skb, dev);
2642                 }
2643                 /* for TSO, pseudo_hdr_offset holds mss.
2644                  * The firmware figures out where to put
2645                  * the checksum by parsing the header. */
2646                 pseudo_hdr_offset = mss;
2647         } else
2648                 /* Mark small packets, and pad out tiny packets */
2649         if (skb->len <= MXGEFW_SEND_SMALL_SIZE) {
2650                 flags |= MXGEFW_FLAGS_SMALL;
2651
2652                 /* pad frames to at least ETH_ZLEN bytes */
2653                 if (unlikely(skb->len < ETH_ZLEN)) {
2654                         if (skb_padto(skb, ETH_ZLEN)) {
2655                                 /* The packet is gone, so we must
2656                                  * return 0 */
2657                                 ss->stats.tx_dropped += 1;
2658                                 return 0;
2659                         }
2660                         /* adjust the len to account for the zero pad
2661                          * so that the nic can know how long it is */
2662                         skb->len = ETH_ZLEN;
2663                 }
2664         }
2665
2666         /* map the skb for DMA */
2667         len = skb->len - skb->data_len;
2668         idx = tx->req & tx->mask;
2669         tx->info[idx].skb = skb;
2670         bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE);
2671         pci_unmap_addr_set(&tx->info[idx], bus, bus);
2672         pci_unmap_len_set(&tx->info[idx], len, len);
2673
2674         frag_cnt = skb_shinfo(skb)->nr_frags;
2675         frag_idx = 0;
2676         count = 0;
2677         rdma_count = 0;
2678
2679         /* "rdma_count" is the number of RDMAs belonging to the
2680          * current packet BEFORE the current send request. For
2681          * non-TSO packets, this is equal to "count".
2682          * For TSO packets, rdma_count needs to be reset
2683          * to 0 after a segment cut.
2684          *
2685          * The rdma_count field of the send request is
2686          * the number of RDMAs of the packet starting at
2687          * that request. For TSO send requests with one ore more cuts
2688          * in the middle, this is the number of RDMAs starting
2689          * after the last cut in the request. All previous
2690          * segments before the last cut implicitly have 1 RDMA.
2691          *
2692          * Since the number of RDMAs is not known beforehand,
2693          * it must be filled-in retroactively - after each
2694          * segmentation cut or at the end of the entire packet.
2695          */
2696
2697         while (1) {
2698                 /* Break the SKB or Fragment up into pieces which
2699                  * do not cross mgp->tx_boundary */
2700                 low = MYRI10GE_LOWPART_TO_U32(bus);
2701                 high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus));
2702                 while (len) {
2703                         u8 flags_next;
2704                         int cum_len_next;
2705
2706                         if (unlikely(count == max_segments))
2707                                 goto abort_linearize;
2708
2709                         boundary =
2710                             (low + mgp->tx_boundary) & ~(mgp->tx_boundary - 1);
2711                         seglen = boundary - low;
2712                         if (seglen > len)
2713                                 seglen = len;
2714                         flags_next = flags & ~MXGEFW_FLAGS_FIRST;
2715                         cum_len_next = cum_len + seglen;
2716                         if (mss) {      /* TSO */
2717                                 (req - rdma_count)->rdma_count = rdma_count + 1;
2718
2719                                 if (likely(cum_len >= 0)) {     /* payload */
2720                                         int next_is_first, chop;
2721
2722                                         chop = (cum_len_next > mss);
2723                                         cum_len_next = cum_len_next % mss;
2724                                         next_is_first = (cum_len_next == 0);
2725                                         flags |= chop * MXGEFW_FLAGS_TSO_CHOP;
2726                                         flags_next |= next_is_first *
2727                                             MXGEFW_FLAGS_FIRST;
2728                                         rdma_count |= -(chop | next_is_first);
2729                                         rdma_count += chop & !next_is_first;
2730                                 } else if (likely(cum_len_next >= 0)) { /* header ends */
2731                                         int small;
2732
2733                                         rdma_count = -1;
2734                                         cum_len_next = 0;
2735                                         seglen = -cum_len;
2736                                         small = (mss <= MXGEFW_SEND_SMALL_SIZE);
2737                                         flags_next = MXGEFW_FLAGS_TSO_PLD |
2738                                             MXGEFW_FLAGS_FIRST |
2739                                             (small * MXGEFW_FLAGS_SMALL);
2740                                 }
2741                         }
2742                         req->addr_high = high_swapped;
2743                         req->addr_low = htonl(low);
2744                         req->pseudo_hdr_offset = htons(pseudo_hdr_offset);
2745                         req->pad = 0;   /* complete solid 16-byte block; does this matter? */
2746                         req->rdma_count = 1;
2747                         req->length = htons(seglen);
2748                         req->cksum_offset = cksum_offset;
2749                         req->flags = flags | ((cum_len & 1) * odd_flag);
2750
2751                         low += seglen;
2752                         len -= seglen;
2753                         cum_len = cum_len_next;
2754                         flags = flags_next;
2755                         req++;
2756                         count++;
2757                         rdma_count++;
2758                         if (cksum_offset != 0 && !(mss && skb_is_gso_v6(skb))) {
2759                                 if (unlikely(cksum_offset > seglen))
2760                                         cksum_offset -= seglen;
2761                                 else
2762                                         cksum_offset = 0;
2763                         }
2764                 }
2765                 if (frag_idx == frag_cnt)
2766                         break;
2767
2768                 /* map next fragment for DMA */
2769                 idx = (count + tx->req) & tx->mask;
2770                 frag = &skb_shinfo(skb)->frags[frag_idx];
2771                 frag_idx++;
2772                 len = frag->size;
2773                 bus = pci_map_page(mgp->pdev, frag->page, frag->page_offset,
2774                                    len, PCI_DMA_TODEVICE);
2775                 pci_unmap_addr_set(&tx->info[idx], bus, bus);
2776                 pci_unmap_len_set(&tx->info[idx], len, len);
2777         }
2778
2779         (req - rdma_count)->rdma_count = rdma_count;
2780         if (mss)
2781                 do {
2782                         req--;
2783                         req->flags |= MXGEFW_FLAGS_TSO_LAST;
2784                 } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP |
2785                                          MXGEFW_FLAGS_FIRST)));
2786         idx = ((count - 1) + tx->req) & tx->mask;
2787         tx->info[idx].last = 1;
2788         myri10ge_submit_req(tx, tx->req_list, count);
2789         tx->pkt_start++;
2790         if ((avail - count) < MXGEFW_MAX_SEND_DESC) {
2791                 tx->stop_queue++;
2792                 netif_stop_queue(dev);
2793         }
2794         dev->trans_start = jiffies;
2795         return 0;
2796
2797 abort_linearize:
2798         /* Free any DMA resources we've alloced and clear out the skb
2799          * slot so as to not trip up assertions, and to avoid a
2800          * double-free if linearizing fails */
2801
2802         last_idx = (idx + 1) & tx->mask;
2803         idx = tx->req & tx->mask;
2804         tx->info[idx].skb = NULL;
2805         do {
2806                 len = pci_unmap_len(&tx->info[idx], len);
2807                 if (len) {
2808                         if (tx->info[idx].skb != NULL)
2809                                 pci_unmap_single(mgp->pdev,
2810                                                  pci_unmap_addr(&tx->info[idx],
2811                                                                 bus), len,
2812                                                  PCI_DMA_TODEVICE);
2813                         else
2814                                 pci_unmap_page(mgp->pdev,
2815                                                pci_unmap_addr(&tx->info[idx],
2816                                                               bus), len,
2817                                                PCI_DMA_TODEVICE);
2818                         pci_unmap_len_set(&tx->info[idx], len, 0);
2819                         tx->info[idx].skb = NULL;
2820                 }
2821                 idx = (idx + 1) & tx->mask;
2822         } while (idx != last_idx);
2823         if (skb_is_gso(skb)) {
2824                 printk(KERN_ERR
2825                        "myri10ge: %s: TSO but wanted to linearize?!?!?\n",
2826                        mgp->dev->name);
2827                 goto drop;
2828         }
2829
2830         if (skb_linearize(skb))
2831                 goto drop;
2832
2833         tx->linearized++;
2834         goto again;
2835
2836 drop:
2837         dev_kfree_skb_any(skb);
2838         ss->stats.tx_dropped += 1;
2839         return 0;
2840
2841 }
2842
2843 static int myri10ge_sw_tso(struct sk_buff *skb, struct net_device *dev)
2844 {
2845         struct sk_buff *segs, *curr;
2846         struct myri10ge_priv *mgp = netdev_priv(dev);
2847         int status;
2848
2849         segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO6);
2850         if (IS_ERR(segs))
2851                 goto drop;
2852
2853         while (segs) {
2854                 curr = segs;
2855                 segs = segs->next;
2856                 curr->next = NULL;
2857                 status = myri10ge_xmit(curr, dev);
2858                 if (status != 0) {
2859                         dev_kfree_skb_any(curr);
2860                         if (segs != NULL) {
2861                                 curr = segs;
2862                                 segs = segs->next;
2863                                 curr->next = NULL;
2864                                 dev_kfree_skb_any(segs);
2865                         }
2866                         goto drop;
2867                 }
2868         }
2869         dev_kfree_skb_any(skb);
2870         return 0;
2871
2872 drop:
2873         dev_kfree_skb_any(skb);
2874         mgp->stats.tx_dropped += 1;
2875         return 0;
2876 }
2877
2878 static struct net_device_stats *myri10ge_get_stats(struct net_device *dev)
2879 {
2880         struct myri10ge_priv *mgp = netdev_priv(dev);
2881         struct myri10ge_slice_netstats *slice_stats;
2882         struct net_device_stats *stats = &mgp->stats;
2883         int i;
2884
2885         memset(stats, 0, sizeof(*stats));
2886         for (i = 0; i < mgp->num_slices; i++) {
2887                 slice_stats = &mgp->ss[i].stats;
2888                 stats->rx_packets += slice_stats->rx_packets;
2889                 stats->tx_packets += slice_stats->tx_packets;
2890                 stats->rx_bytes += slice_stats->rx_bytes;
2891                 stats->tx_bytes += slice_stats->tx_bytes;
2892                 stats->rx_dropped += slice_stats->rx_dropped;
2893                 stats->tx_dropped += slice_stats->tx_dropped;
2894         }
2895         return stats;
2896 }
2897
2898 static void myri10ge_set_multicast_list(struct net_device *dev)
2899 {
2900         struct myri10ge_priv *mgp = netdev_priv(dev);
2901         struct myri10ge_cmd cmd;
2902         struct dev_mc_list *mc_list;
2903         __be32 data[2] = { 0, 0 };
2904         int err;
2905         DECLARE_MAC_BUF(mac);
2906
2907         /* can be called from atomic contexts,
2908          * pass 1 to force atomicity in myri10ge_send_cmd() */
2909         myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1);
2910
2911         /* This firmware is known to not support multicast */
2912         if (!mgp->fw_multicast_support)
2913                 return;
2914
2915         /* Disable multicast filtering */
2916
2917         err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1);
2918         if (err != 0) {
2919                 printk(KERN_ERR "myri10ge: %s: Failed MXGEFW_ENABLE_ALLMULTI,"
2920                        " error status: %d\n", dev->name, err);
2921                 goto abort;
2922         }
2923
2924         if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) {
2925                 /* request to disable multicast filtering, so quit here */
2926                 return;
2927         }
2928
2929         /* Flush the filters */
2930
2931         err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS,
2932                                 &cmd, 1);
2933         if (err != 0) {
2934                 printk(KERN_ERR
2935                        "myri10ge: %s: Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS"
2936                        ", error status: %d\n", dev->name, err);
2937                 goto abort;
2938         }
2939
2940         /* Walk the multicast list, and add each address */
2941         for (mc_list = dev->mc_list; mc_list != NULL; mc_list = mc_list->next) {
2942                 memcpy(data, &mc_list->dmi_addr, 6);
2943                 cmd.data0 = ntohl(data[0]);
2944                 cmd.data1 = ntohl(data[1]);
2945                 err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP,
2946                                         &cmd, 1);
2947
2948                 if (err != 0) {
2949                         printk(KERN_ERR "myri10ge: %s: Failed "
2950                                "MXGEFW_JOIN_MULTICAST_GROUP, error status:"
2951                                "%d\t", dev->name, err);
2952                         printk(KERN_ERR "MAC %s\n",
2953                                print_mac(mac, mc_list->dmi_addr));
2954                         goto abort;
2955                 }
2956         }
2957         /* Enable multicast filtering */
2958         err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1);
2959         if (err != 0) {
2960                 printk(KERN_ERR "myri10ge: %s: Failed MXGEFW_DISABLE_ALLMULTI,"
2961                        "error status: %d\n", dev->name, err);
2962                 goto abort;
2963         }
2964
2965         return;
2966
2967 abort:
2968         return;
2969 }
2970
2971 static int myri10ge_set_mac_address(struct net_device *dev, void *addr)
2972 {
2973         struct sockaddr *sa = addr;
2974         struct myri10ge_priv *mgp = netdev_priv(dev);
2975         int status;
2976
2977         if (!is_valid_ether_addr(sa->sa_data))
2978                 return -EADDRNOTAVAIL;
2979
2980         status = myri10ge_update_mac_address(mgp, sa->sa_data);
2981         if (status != 0) {
2982                 printk(KERN_ERR
2983                        "myri10ge: %s: changing mac address failed with %d\n",
2984                        dev->name, status);
2985                 return status;
2986         }
2987
2988         /* change the dev structure */
2989         memcpy(dev->dev_addr, sa->sa_data, 6);
2990         return 0;
2991 }
2992
2993 static int myri10ge_change_mtu(struct net_device *dev, int new_mtu)
2994 {
2995         struct myri10ge_priv *mgp = netdev_priv(dev);
2996         int error = 0;
2997
2998         if ((new_mtu < 68) || (ETH_HLEN + new_mtu > MYRI10GE_MAX_ETHER_MTU)) {
2999                 printk(KERN_ERR "myri10ge: %s: new mtu (%d) is not valid\n",
3000                        dev->name, new_mtu);
3001                 return -EINVAL;
3002         }
3003         printk(KERN_INFO "%s: changing mtu from %d to %d\n",
3004                dev->name, dev->mtu, new_mtu);
3005         if (mgp->running) {
3006                 /* if we change the mtu on an active device, we must
3007                  * reset the device so the firmware sees the change */
3008                 myri10ge_close(dev);
3009                 dev->mtu = new_mtu;
3010                 myri10ge_open(dev);
3011         } else
3012                 dev->mtu = new_mtu;
3013
3014         return error;
3015 }
3016
3017 /*
3018  * Enable ECRC to align PCI-E Completion packets on an 8-byte boundary.
3019  * Only do it if the bridge is a root port since we don't want to disturb
3020  * any other device, except if forced with myri10ge_ecrc_enable > 1.
3021  */
3022
3023 static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
3024 {
3025         struct pci_dev *bridge = mgp->pdev->bus->self;
3026         struct device *dev = &mgp->pdev->dev;
3027         unsigned cap;
3028         unsigned err_cap;
3029         u16 val;
3030         u8 ext_type;
3031         int ret;
3032
3033         if (!myri10ge_ecrc_enable || !bridge)
3034                 return;
3035
3036         /* check that the bridge is a root port */
3037         cap = pci_find_capability(bridge, PCI_CAP_ID_EXP);
3038         pci_read_config_word(bridge, cap + PCI_CAP_FLAGS, &val);
3039         ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
3040         if (ext_type != PCI_EXP_TYPE_ROOT_PORT) {
3041                 if (myri10ge_ecrc_enable > 1) {
3042                         struct pci_dev *prev_bridge, *old_bridge = bridge;
3043
3044                         /* Walk the hierarchy up to the root port
3045                          * where ECRC has to be enabled */
3046                         do {
3047                                 prev_bridge = bridge;
3048                                 bridge = bridge->bus->self;
3049                                 if (!bridge || prev_bridge == bridge) {
3050                                         dev_err(dev,
3051                                                 "Failed to find root port"
3052                                                 " to force ECRC\n");
3053                                         return;
3054                                 }
3055                                 cap =
3056                                     pci_find_capability(bridge, PCI_CAP_ID_EXP);
3057                                 pci_read_config_word(bridge,
3058                                                      cap + PCI_CAP_FLAGS, &val);
3059                                 ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
3060                         } while (ext_type != PCI_EXP_TYPE_ROOT_PORT);
3061
3062                         dev_info(dev,
3063                                  "Forcing ECRC on non-root port %s"
3064                                  " (enabling on root port %s)\n",
3065                                  pci_name(old_bridge), pci_name(bridge));
3066                 } else {
3067                         dev_err(dev,
3068                                 "Not enabling ECRC on non-root port %s\n",
3069                                 pci_name(bridge));
3070                         return;
3071                 }
3072         }
3073
3074         cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
3075         if (!cap)
3076                 return;
3077
3078         ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap);
3079         if (ret) {
3080                 dev_err(dev, "failed reading ext-conf-space of %s\n",
3081                         pci_name(bridge));
3082                 dev_err(dev, "\t pci=nommconf in use? "
3083                         "or buggy/incomplete/absent ACPI MCFG attr?\n");
3084                 return;
3085         }
3086         if (!(err_cap & PCI_ERR_CAP_ECRC_GENC))
3087                 return;
3088
3089         err_cap |= PCI_ERR_CAP_ECRC_GENE;
3090         pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap);
3091         dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge));
3092 }
3093
3094 /*
3095  * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput
3096  * when the PCI-E Completion packets are aligned on an 8-byte
3097  * boundary.  Some PCI-E chip sets always align Completion packets; on
3098  * the ones that do not, the alignment can be enforced by enabling
3099  * ECRC generation (if supported).
3100  *
3101  * When PCI-E Completion packets are not aligned, it is actually more
3102  * efficient to limit Read-DMA transactions to 2KB, rather than 4KB.
3103  *
3104  * If the driver can neither enable ECRC nor verify that it has
3105  * already been enabled, then it must use a firmware image which works
3106  * around unaligned completion packets (myri10ge_rss_ethp_z8e.dat), and it
3107  * should also ensure that it never gives the device a Read-DMA which is
3108  * larger than 2KB by setting the tx_boundary to 2KB.  If ECRC is
3109  * enabled, then the driver should use the aligned (myri10ge_rss_eth_z8e.dat)
3110  * firmware image, and set tx_boundary to 4KB.
3111  */
3112
3113 static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
3114 {
3115         struct pci_dev *pdev = mgp->pdev;
3116         struct device *dev = &pdev->dev;
3117         int status;
3118
3119         mgp->tx_boundary = 4096;
3120         /*
3121          * Verify the max read request size was set to 4KB
3122          * before trying the test with 4KB.
3123          */
3124         status = pcie_get_readrq(pdev);
3125         if (status < 0) {
3126                 dev_err(dev, "Couldn't read max read req size: %d\n", status);
3127                 goto abort;
3128         }
3129         if (status != 4096) {
3130                 dev_warn(dev, "Max Read Request size != 4096 (%d)\n", status);
3131                 mgp->tx_boundary = 2048;
3132         }
3133         /*
3134          * load the optimized firmware (which assumes aligned PCIe
3135          * completions) in order to see if it works on this host.
3136          */
3137         mgp->fw_name = myri10ge_fw_aligned;
3138         status = myri10ge_load_firmware(mgp, 1);
3139         if (status != 0) {
3140                 goto abort;
3141         }
3142
3143         /*
3144          * Enable ECRC if possible
3145          */
3146         myri10ge_enable_ecrc(mgp);
3147
3148         /*
3149          * Run a DMA test which watches for unaligned completions and
3150          * aborts on the first one seen.
3151          */
3152
3153         status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST);
3154         if (status == 0)
3155                 return;         /* keep the aligned firmware */
3156
3157         if (status != -E2BIG)
3158                 dev_warn(dev, "DMA test failed: %d\n", status);
3159         if (status == -ENOSYS)
3160                 dev_warn(dev, "Falling back to ethp! "
3161                          "Please install up to date fw\n");
3162 abort:
3163         /* fall back to using the unaligned firmware */
3164         mgp->tx_boundary = 2048;
3165         mgp->fw_name = myri10ge_fw_unaligned;
3166
3167 }
3168
3169 static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
3170 {
3171         if (myri10ge_force_firmware == 0) {
3172                 int link_width, exp_cap;
3173                 u16 lnk;
3174
3175                 exp_cap = pci_find_capability(mgp->pdev, PCI_CAP_ID_EXP);
3176                 pci_read_config_word(mgp->pdev, exp_cap + PCI_EXP_LNKSTA, &lnk);
3177                 link_width = (lnk >> 4) & 0x3f;
3178
3179                 /* Check to see if Link is less than 8 or if the
3180                  * upstream bridge is known to provide aligned
3181                  * completions */
3182                 if (link_width < 8) {
3183                         dev_info(&mgp->pdev->dev, "PCIE x%d Link\n",
3184                                  link_width);
3185                         mgp->tx_boundary = 4096;
3186                         mgp->fw_name = myri10ge_fw_aligned;
3187                 } else {
3188                         myri10ge_firmware_probe(mgp);
3189                 }
3190         } else {
3191                 if (myri10ge_force_firmware == 1) {
3192                         dev_info(&mgp->pdev->dev,
3193                                  "Assuming aligned completions (forced)\n");
3194                         mgp->tx_boundary = 4096;
3195                         mgp->fw_name = myri10ge_fw_aligned;
3196                 } else {
3197                         dev_info(&mgp->pdev->dev,
3198                                  "Assuming unaligned completions (forced)\n");
3199                         mgp->tx_boundary = 2048;
3200                         mgp->fw_name = myri10ge_fw_unaligned;
3201                 }
3202         }
3203         if (myri10ge_fw_name != NULL) {
3204                 dev_info(&mgp->pdev->dev, "overriding firmware to %s\n",
3205                          myri10ge_fw_name);
3206                 mgp->fw_name = myri10ge_fw_name;
3207         }
3208 }
3209
3210 #ifdef CONFIG_PM
3211 static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state)
3212 {
3213         struct myri10ge_priv *mgp;
3214         struct net_device *netdev;
3215
3216         mgp = pci_get_drvdata(pdev);
3217         if (mgp == NULL)
3218                 return -EINVAL;
3219         netdev = mgp->dev;
3220
3221         netif_device_detach(netdev);
3222         if (netif_running(netdev)) {
3223                 printk(KERN_INFO "myri10ge: closing %s\n", netdev->name);
3224                 rtnl_lock();
3225                 myri10ge_close(netdev);
3226                 rtnl_unlock();
3227         }
3228         myri10ge_dummy_rdma(mgp, 0);
3229         pci_save_state(pdev);
3230         pci_disable_device(pdev);
3231
3232         return pci_set_power_state(pdev, pci_choose_state(pdev, state));
3233 }
3234
3235 static int myri10ge_resume(struct pci_dev *pdev)
3236 {
3237         struct myri10ge_priv *mgp;
3238         struct net_device *netdev;
3239         int status;
3240         u16 vendor;
3241
3242         mgp = pci_get_drvdata(pdev);
3243         if (mgp == NULL)
3244                 return -EINVAL;
3245         netdev = mgp->dev;
3246         pci_set_power_state(pdev, 0);   /* zeros conf space as a side effect */
3247         msleep(5);              /* give card time to respond */
3248         pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3249         if (vendor == 0xffff) {
3250                 printk(KERN_ERR "myri10ge: %s: device disappeared!\n",
3251                        mgp->dev->name);
3252                 return -EIO;
3253         }
3254
3255         status = pci_restore_state(pdev);
3256         if (status)
3257                 return status;
3258
3259         status = pci_enable_device(pdev);
3260         if (status) {
3261                 dev_err(&pdev->dev, "failed to enable device\n");
3262                 return status;
3263         }
3264
3265         pci_set_master(pdev);
3266
3267         myri10ge_reset(mgp);
3268         myri10ge_dummy_rdma(mgp, 1);
3269
3270         /* Save configuration space to be restored if the
3271          * nic resets due to a parity error */
3272         pci_save_state(pdev);
3273
3274         if (netif_running(netdev)) {
3275                 rtnl_lock();
3276                 status = myri10ge_open(netdev);
3277                 rtnl_unlock();
3278                 if (status != 0)
3279                         goto abort_with_enabled;
3280
3281         }
3282         netif_device_attach(netdev);
3283
3284         return 0;
3285
3286 abort_with_enabled:
3287         pci_disable_device(pdev);
3288         return -EIO;
3289
3290 }
3291 #endif                          /* CONFIG_PM */
3292
3293 static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp)
3294 {
3295         struct pci_dev *pdev = mgp->pdev;
3296         int vs = mgp->vendor_specific_offset;
3297         u32 reboot;
3298
3299         /*enter read32 mode */
3300         pci_write_config_byte(pdev, vs + 0x10, 0x3);
3301
3302         /*read REBOOT_STATUS (0xfffffff0) */
3303         pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0);
3304         pci_read_config_dword(pdev, vs + 0x14, &reboot);
3305         return reboot;
3306 }
3307
3308 /*
3309  * This watchdog is used to check whether the board has suffered
3310  * from a parity error and needs to be recovered.
3311  */
3312 static void myri10ge_watchdog(struct work_struct *work)
3313 {
3314         struct myri10ge_priv *mgp =
3315             container_of(work, struct myri10ge_priv, watchdog_work);
3316         struct myri10ge_tx_buf *tx;
3317         u32 reboot;
3318         int status;
3319         int i;
3320         u16 cmd, vendor;
3321
3322         mgp->watchdog_resets++;
3323         pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd);
3324         if ((cmd & PCI_COMMAND_MASTER) == 0) {
3325                 /* Bus master DMA disabled?  Check to see
3326                  * if the card rebooted due to a parity error
3327                  * For now, just report it */
3328                 reboot = myri10ge_read_reboot(mgp);
3329                 printk(KERN_ERR
3330                        "myri10ge: %s: NIC rebooted (0x%x),%s resetting\n",
3331                        mgp->dev->name, reboot,
3332                        myri10ge_reset_recover ? " " : " not");
3333                 if (myri10ge_reset_recover == 0)
3334                         return;
3335
3336                 myri10ge_reset_recover--;
3337
3338                 /*
3339                  * A rebooted nic will come back with config space as
3340                  * it was after power was applied to PCIe bus.
3341                  * Attempt to restore config space which was saved
3342                  * when the driver was loaded, or the last time the
3343                  * nic was resumed from power saving mode.
3344                  */
3345                 pci_restore_state(mgp->pdev);
3346
3347                 /* save state again for accounting reasons */
3348                 pci_save_state(mgp->pdev);
3349
3350         } else {
3351                 /* if we get back -1's from our slot, perhaps somebody
3352                  * powered off our card.  Don't try to reset it in
3353                  * this case */
3354                 if (cmd == 0xffff) {
3355                         pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor);
3356                         if (vendor == 0xffff) {
3357                                 printk(KERN_ERR
3358                                        "myri10ge: %s: device disappeared!\n",
3359                                        mgp->dev->name);
3360                                 return;
3361                         }
3362                 }
3363                 /* Perhaps it is a software error.  Try to reset */
3364
3365                 printk(KERN_ERR "myri10ge: %s: device timeout, resetting\n",
3366                        mgp->dev->name);
3367                 for (i = 0; i < mgp->num_slices; i++) {
3368                         tx = &mgp->ss[i].tx;
3369                         printk(KERN_INFO
3370                                "myri10ge: %s: (%d): %d %d %d %d %d\n",
3371                                mgp->dev->name, i, tx->req, tx->done,
3372                                tx->pkt_start, tx->pkt_done,
3373                                (int)ntohl(mgp->ss[i].fw_stats->
3374                                           send_done_count));
3375                         msleep(2000);
3376                         printk(KERN_INFO
3377                                "myri10ge: %s: (%d): %d %d %d %d %d\n",
3378                                mgp->dev->name, i, tx->req, tx->done,
3379                                tx->pkt_start, tx->pkt_done,
3380                                (int)ntohl(mgp->ss[i].fw_stats->
3381                                           send_done_count));
3382                 }
3383         }
3384         rtnl_lock();
3385         myri10ge_close(mgp->dev);
3386         status = myri10ge_load_firmware(mgp, 1);
3387         if (status != 0)
3388                 printk(KERN_ERR "myri10ge: %s: failed to load firmware\n",
3389                        mgp->dev->name);
3390         else
3391                 myri10ge_open(mgp->dev);
3392         rtnl_unlock();
3393 }
3394
3395 /*
3396  * We use our own timer routine rather than relying upon
3397  * netdev->tx_timeout because we have a very large hardware transmit
3398  * queue.  Due to the large queue, the netdev->tx_timeout function
3399  * cannot detect a NIC with a parity error in a timely fashion if the
3400  * NIC is lightly loaded.
3401  */
3402 static void myri10ge_watchdog_timer(unsigned long arg)
3403 {
3404         struct myri10ge_priv *mgp;
3405         struct myri10ge_slice_state *ss;
3406         int i, reset_needed;
3407         u32 rx_pause_cnt;
3408
3409         mgp = (struct myri10ge_priv *)arg;
3410
3411         rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause);
3412         for (i = 0, reset_needed = 0;
3413              i < mgp->num_slices && reset_needed == 0; ++i) {
3414
3415                 ss = &mgp->ss[i];
3416                 if (ss->rx_small.watchdog_needed) {
3417                         myri10ge_alloc_rx_pages(mgp, &ss->rx_small,
3418                                                 mgp->small_bytes + MXGEFW_PAD,
3419                                                 1);
3420                         if (ss->rx_small.fill_cnt - ss->rx_small.cnt >=
3421                             myri10ge_fill_thresh)
3422                                 ss->rx_small.watchdog_needed = 0;
3423                 }
3424                 if (ss->rx_big.watchdog_needed) {
3425                         myri10ge_alloc_rx_pages(mgp, &ss->rx_big,
3426                                                 mgp->big_bytes, 1);
3427                         if (ss->rx_big.fill_cnt - ss->rx_big.cnt >=
3428                             myri10ge_fill_thresh)
3429                                 ss->rx_big.watchdog_needed = 0;
3430                 }
3431
3432                 if (ss->tx.req != ss->tx.done &&
3433                     ss->tx.done == ss->watchdog_tx_done &&
3434                     ss->watchdog_tx_req != ss->watchdog_tx_done) {
3435                         /* nic seems like it might be stuck.. */
3436                         if (rx_pause_cnt != mgp->watchdog_pause) {
3437                                 if (net_ratelimit())
3438                                         printk(KERN_WARNING "myri10ge %s:"
3439                                                "TX paused, check link partner\n",
3440                                                mgp->dev->name);
3441                         } else {
3442                                 reset_needed = 1;
3443                         }
3444                 }
3445                 ss->watchdog_tx_done = ss->tx.done;
3446                 ss->watchdog_tx_req = ss->tx.req;
3447         }
3448         mgp->watchdog_pause = rx_pause_cnt;
3449
3450         if (reset_needed) {
3451                 schedule_work(&mgp->watchdog_work);
3452         } else {
3453                 /* rearm timer */
3454                 mod_timer(&mgp->watchdog_timer,
3455                           jiffies + myri10ge_watchdog_timeout * HZ);
3456         }
3457 }
3458
3459 static void myri10ge_free_slices(struct myri10ge_priv *mgp)
3460 {
3461         struct myri10ge_slice_state *ss;
3462         struct pci_dev *pdev = mgp->pdev;
3463         size_t bytes;
3464         int i;
3465
3466         if (mgp->ss == NULL)
3467                 return;
3468
3469         for (i = 0; i < mgp->num_slices; i++) {
3470                 ss = &mgp->ss[i];
3471                 if (ss->rx_done.entry != NULL) {
3472                         bytes = mgp->max_intr_slots *
3473                             sizeof(*ss->rx_done.entry);
3474                         dma_free_coherent(&pdev->dev, bytes,
3475                                           ss->rx_done.entry, ss->rx_done.bus);
3476                         ss->rx_done.entry = NULL;
3477                 }
3478                 if (ss->fw_stats != NULL) {
3479                         bytes = sizeof(*ss->fw_stats);
3480                         dma_free_coherent(&pdev->dev, bytes,
3481                                           ss->fw_stats, ss->fw_stats_bus);
3482                         ss->fw_stats = NULL;
3483                 }
3484         }
3485         kfree(mgp->ss);
3486         mgp->ss = NULL;
3487 }
3488
3489 static int myri10ge_alloc_slices(struct myri10ge_priv *mgp)
3490 {
3491         struct myri10ge_slice_state *ss;
3492         struct pci_dev *pdev = mgp->pdev;
3493         size_t bytes;
3494         int i;
3495
3496         bytes = sizeof(*mgp->ss) * mgp->num_slices;
3497         mgp->ss = kzalloc(bytes, GFP_KERNEL);
3498         if (mgp->ss == NULL) {
3499                 return -ENOMEM;
3500         }
3501
3502         for (i = 0; i < mgp->num_slices; i++) {
3503                 ss = &mgp->ss[i];
3504                 bytes = mgp->max_intr_slots * sizeof(*ss->rx_done.entry);
3505                 ss->rx_done.entry = dma_alloc_coherent(&pdev->dev, bytes,
3506                                                        &ss->rx_done.bus,
3507                                                        GFP_KERNEL);
3508                 if (ss->rx_done.entry == NULL)
3509                         goto abort;
3510                 memset(ss->rx_done.entry, 0, bytes);
3511                 bytes = sizeof(*ss->fw_stats);
3512                 ss->fw_stats = dma_alloc_coherent(&pdev->dev, bytes,
3513                                                   &ss->fw_stats_bus,
3514                                                   GFP_KERNEL);
3515                 if (ss->fw_stats == NULL)
3516                         goto abort;
3517                 ss->mgp = mgp;
3518                 ss->dev = mgp->dev;
3519                 netif_napi_add(ss->dev, &ss->napi, myri10ge_poll,
3520                                myri10ge_napi_weight);
3521         }
3522         return 0;
3523 abort:
3524         myri10ge_free_slices(mgp);
3525         return -ENOMEM;
3526 }
3527
3528 /*
3529  * This function determines the number of slices supported.
3530  * The number slices is the minumum of the number of CPUS,
3531  * the number of MSI-X irqs supported, the number of slices
3532  * supported by the firmware
3533  */
3534 static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
3535 {
3536         struct myri10ge_cmd cmd;
3537         struct pci_dev *pdev = mgp->pdev;
3538         char *old_fw;
3539         int i, status, ncpus, msix_cap;
3540
3541         mgp->num_slices = 1;
3542         msix_cap = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
3543         ncpus = num_online_cpus();
3544
3545         if (myri10ge_max_slices == 1 || msix_cap == 0 ||
3546             (myri10ge_max_slices == -1 && ncpus < 2))
3547                 return;
3548
3549         /* try to load the slice aware rss firmware */
3550         old_fw = mgp->fw_name;
3551         if (old_fw == myri10ge_fw_aligned)
3552                 mgp->fw_name = myri10ge_fw_rss_aligned;
3553         else
3554                 mgp->fw_name = myri10ge_fw_rss_unaligned;
3555         status = myri10ge_load_firmware(mgp, 0);
3556         if (status != 0) {
3557                 dev_info(&pdev->dev, "Rss firmware not found\n");
3558                 return;
3559         }
3560
3561         /* hit the board with a reset to ensure it is alive */
3562         memset(&cmd, 0, sizeof(cmd));
3563         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0);
3564         if (status != 0) {
3565                 dev_err(&mgp->pdev->dev, "failed reset\n");
3566                 goto abort_with_fw;
3567                 return;
3568         }
3569
3570         mgp->max_intr_slots = cmd.data0 / sizeof(struct mcp_slot);
3571
3572         /* tell it the size of the interrupt queues */
3573         cmd.data0 = mgp->max_intr_slots * sizeof(struct mcp_slot);
3574         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0);
3575         if (status != 0) {
3576                 dev_err(&mgp->pdev->dev, "failed MXGEFW_CMD_SET_INTRQ_SIZE\n");
3577                 goto abort_with_fw;
3578         }
3579
3580         /* ask the maximum number of slices it supports */
3581         status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES, &cmd, 0);
3582         if (status != 0)
3583                 goto abort_with_fw;
3584         else
3585                 mgp->num_slices = cmd.data0;
3586
3587         /* Only allow multiple slices if MSI-X is usable */
3588         if (!myri10ge_msi) {
3589                 goto abort_with_fw;
3590         }
3591
3592         /* if the admin did not specify a limit to how many
3593          * slices we should use, cap it automatically to the
3594          * number of CPUs currently online */
3595         if (myri10ge_max_slices == -1)
3596                 myri10ge_max_slices = ncpus;
3597
3598         if (mgp->num_slices > myri10ge_max_slices)
3599                 mgp->num_slices = myri10ge_max_slices;
3600
3601         /* Now try to allocate as many MSI-X vectors as we have
3602          * slices. We give up on MSI-X if we can only get a single
3603          * vector. */
3604
3605         mgp->msix_vectors = kzalloc(mgp->num_slices *
3606                                     sizeof(*mgp->msix_vectors), GFP_KERNEL);
3607         if (mgp->msix_vectors == NULL)
3608                 goto disable_msix;
3609         for (i = 0; i < mgp->num_slices; i++) {
3610                 mgp->msix_vectors[i].entry = i;
3611         }
3612
3613         while (mgp->num_slices > 1) {
3614                 /* make sure it is a power of two */
3615                 while (!is_power_of_2(mgp->num_slices))
3616                         mgp->num_slices--;
3617                 if (mgp->num_slices == 1)
3618                         goto disable_msix;
3619                 status = pci_enable_msix(pdev, mgp->msix_vectors,
3620                                          mgp->num_slices);
3621                 if (status == 0) {
3622                         pci_disable_msix(pdev);
3623                         return;
3624                 }
3625                 if (status > 0)
3626                         mgp->num_slices = status;
3627                 else
3628                         goto disable_msix;
3629         }
3630
3631 disable_msix:
3632         if (mgp->msix_vectors != NULL) {
3633                 kfree(mgp->msix_vectors);
3634                 mgp->msix_vectors = NULL;
3635         }
3636
3637 abort_with_fw:
3638         mgp->num_slices = 1;
3639         mgp->fw_name = old_fw;
3640         myri10ge_load_firmware(mgp, 0);
3641 }
3642
3643 static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3644 {
3645         struct net_device *netdev;
3646         struct myri10ge_priv *mgp;
3647         struct device *dev = &pdev->dev;
3648         int i;
3649         int status = -ENXIO;
3650         int dac_enabled;
3651
3652         netdev = alloc_etherdev(sizeof(*mgp));
3653         if (netdev == NULL) {
3654                 dev_err(dev, "Could not allocate ethernet device\n");
3655                 return -ENOMEM;
3656         }
3657
3658         SET_NETDEV_DEV(netdev, &pdev->dev);
3659
3660         mgp = netdev_priv(netdev);
3661         mgp->dev = netdev;
3662         mgp->pdev = pdev;
3663         mgp->csum_flag = MXGEFW_FLAGS_CKSUM;
3664         mgp->pause = myri10ge_flow_control;
3665         mgp->intr_coal_delay = myri10ge_intr_coal_delay;
3666         mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT);
3667         init_waitqueue_head(&mgp->down_wq);
3668
3669         if (pci_enable_device(pdev)) {
3670                 dev_err(&pdev->dev, "pci_enable_device call failed\n");
3671                 status = -ENODEV;
3672                 goto abort_with_netdev;
3673         }
3674
3675         /* Find the vendor-specific cap so we can check
3676          * the reboot register later on */
3677         mgp->vendor_specific_offset
3678             = pci_find_capability(pdev, PCI_CAP_ID_VNDR);
3679
3680         /* Set our max read request to 4KB */
3681         status = pcie_set_readrq(pdev, 4096);
3682         if (status != 0) {
3683                 dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n",
3684                         status);
3685                 goto abort_with_netdev;
3686         }
3687
3688         pci_set_master(pdev);
3689         dac_enabled = 1;
3690         status = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
3691         if (status != 0) {
3692                 dac_enabled = 0;
3693                 dev_err(&pdev->dev,
3694                         "64-bit pci address mask was refused, "
3695                         "trying 32-bit\n");
3696                 status = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
3697         }
3698         if (status != 0) {
3699                 dev_err(&pdev->dev, "Error %d setting DMA mask\n", status);
3700                 goto abort_with_netdev;
3701         }
3702         (void)pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
3703         mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd),
3704                                       &mgp->cmd_bus, GFP_KERNEL);
3705         if (mgp->cmd == NULL)
3706                 goto abort_with_netdev;
3707
3708         mgp->board_span = pci_resource_len(pdev, 0);
3709         mgp->iomem_base = pci_resource_start(pdev, 0);
3710         mgp->mtrr = -1;
3711         mgp->wc_enabled = 0;
3712 #ifdef CONFIG_MTRR
3713         mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span,
3714                              MTRR_TYPE_WRCOMB, 1);
3715         if (mgp->mtrr >= 0)
3716                 mgp->wc_enabled = 1;
3717 #endif
3718         /* Hack.  need to get rid of these magic numbers */
3719         mgp->sram_size =
3720             2 * 1024 * 1024 - (2 * (48 * 1024) + (32 * 1024)) - 0x100;
3721         if (mgp->sram_size > mgp->board_span) {
3722                 dev_err(&pdev->dev, "board span %ld bytes too small\n",
3723                         mgp->board_span);
3724                 goto abort_with_mtrr;
3725         }
3726         mgp->sram = ioremap_wc(mgp->iomem_base, mgp->board_span);
3727         if (mgp->sram == NULL) {
3728                 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n",
3729                         mgp->board_span, mgp->iomem_base);
3730                 status = -ENXIO;
3731                 goto abort_with_mtrr;
3732         }
3733         memcpy_fromio(mgp->eeprom_strings,
3734                       mgp->sram + mgp->sram_size - MYRI10GE_EEPROM_STRINGS_SIZE,
3735                       MYRI10GE_EEPROM_STRINGS_SIZE);
3736         memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2);
3737         status = myri10ge_read_mac_addr(mgp);
3738         if (status)
3739                 goto abort_with_ioremap;
3740
3741         for (i = 0; i < ETH_ALEN; i++)
3742                 netdev->dev_addr[i] = mgp->mac_addr[i];
3743
3744         myri10ge_select_firmware(mgp);
3745
3746         status = myri10ge_load_firmware(mgp, 1);
3747         if (status != 0) {
3748                 dev_err(&pdev->dev, "failed to load firmware\n");
3749                 goto abort_with_ioremap;
3750         }
3751         myri10ge_probe_slices(mgp);
3752         status = myri10ge_alloc_slices(mgp);
3753         if (status != 0) {
3754                 dev_err(&pdev->dev, "failed to alloc slice state\n");
3755                 goto abort_with_firmware;
3756         }
3757
3758         status = myri10ge_reset(mgp);
3759         if (status != 0) {
3760                 dev_err(&pdev->dev, "failed reset\n");
3761                 goto abort_with_slices;
3762         }
3763 #ifdef CONFIG_DCA
3764         myri10ge_setup_dca(mgp);
3765 #endif
3766         pci_set_drvdata(pdev, mgp);
3767         if ((myri10ge_initial_mtu + ETH_HLEN) > MYRI10GE_MAX_ETHER_MTU)
3768                 myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN;
3769         if ((myri10ge_initial_mtu + ETH_HLEN) < 68)
3770                 myri10ge_initial_mtu = 68;
3771         netdev->mtu = myri10ge_initial_mtu;
3772         netdev->open = myri10ge_open;
3773         netdev->stop = myri10ge_close;
3774         netdev->hard_start_xmit = myri10ge_xmit;
3775         netdev->get_stats = myri10ge_get_stats;
3776         netdev->base_addr = mgp->iomem_base;
3777         netdev->change_mtu = myri10ge_change_mtu;
3778         netdev->set_multicast_list = myri10ge_set_multicast_list;
3779         netdev->set_mac_address = myri10ge_set_mac_address;
3780         netdev->features = mgp->features;
3781         if (dac_enabled)
3782                 netdev->features |= NETIF_F_HIGHDMA;
3783
3784         /* make sure we can get an irq, and that MSI can be
3785          * setup (if available).  Also ensure netdev->irq
3786          * is set to correct value if MSI is enabled */
3787         status = myri10ge_request_irq(mgp);
3788         if (status != 0)
3789                 goto abort_with_firmware;
3790         netdev->irq = pdev->irq;
3791         myri10ge_free_irq(mgp);
3792
3793         /* Save configuration space to be restored if the
3794          * nic resets due to a parity error */
3795         pci_save_state(pdev);
3796
3797         /* Setup the watchdog timer */
3798         setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer,
3799                     (unsigned long)mgp);
3800
3801         SET_ETHTOOL_OPS(netdev, &myri10ge_ethtool_ops);
3802         INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog);
3803         status = register_netdev(netdev);
3804         if (status != 0) {
3805                 dev_err(&pdev->dev, "register_netdev failed: %d\n", status);
3806                 goto abort_with_state;
3807         }
3808         if (mgp->msix_enabled)
3809                 dev_info(dev, "%d MSI-X IRQs, tx bndry %d, fw %s, WC %s\n",
3810                          mgp->num_slices, mgp->tx_boundary, mgp->fw_name,
3811                          (mgp->wc_enabled ? "Enabled" : "Disabled"));
3812         else
3813                 dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, WC %s\n",
3814                          mgp->msi_enabled ? "MSI" : "xPIC",
3815                          netdev->irq, mgp->tx_boundary, mgp->fw_name,
3816                          (mgp->wc_enabled ? "Enabled" : "Disabled"));
3817
3818         return 0;
3819
3820 abort_with_state:
3821         pci_restore_state(pdev);
3822
3823 abort_with_slices:
3824         myri10ge_free_slices(mgp);
3825
3826 abort_with_firmware:
3827         myri10ge_dummy_rdma(mgp, 0);
3828
3829 abort_with_ioremap:
3830         iounmap(mgp->sram);
3831
3832 abort_with_mtrr:
3833 #ifdef CONFIG_MTRR
3834         if (mgp->mtrr >= 0)
3835                 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
3836 #endif
3837         dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
3838                           mgp->cmd, mgp->cmd_bus);
3839
3840 abort_with_netdev:
3841
3842         free_netdev(netdev);
3843         return status;
3844 }
3845
3846 /*
3847  * myri10ge_remove
3848  *
3849  * Does what is necessary to shutdown one Myrinet device. Called
3850  *   once for each Myrinet card by the kernel when a module is
3851  *   unloaded.
3852  */
3853 static void myri10ge_remove(struct pci_dev *pdev)
3854 {
3855         struct myri10ge_priv *mgp;
3856         struct net_device *netdev;
3857
3858         mgp = pci_get_drvdata(pdev);
3859         if (mgp == NULL)
3860                 return;
3861
3862         flush_scheduled_work();
3863         netdev = mgp->dev;
3864         unregister_netdev(netdev);
3865
3866 #ifdef CONFIG_DCA
3867         myri10ge_teardown_dca(mgp);
3868 #endif
3869         myri10ge_dummy_rdma(mgp, 0);
3870
3871         /* avoid a memory leak */
3872         pci_restore_state(pdev);
3873
3874         iounmap(mgp->sram);
3875
3876 #ifdef CONFIG_MTRR
3877         if (mgp->mtrr >= 0)
3878                 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
3879 #endif
3880         myri10ge_free_slices(mgp);
3881         if (mgp->msix_vectors != NULL)
3882                 kfree(mgp->msix_vectors);
3883         dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
3884                           mgp->cmd, mgp->cmd_bus);
3885
3886         free_netdev(netdev);
3887         pci_set_drvdata(pdev, NULL);
3888 }
3889
3890 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E      0x0008
3891 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9    0x0009
3892
3893 static struct pci_device_id myri10ge_pci_tbl[] = {
3894         {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)},
3895         {PCI_DEVICE
3896          (PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9)},
3897         {0},
3898 };
3899
3900 static struct pci_driver myri10ge_driver = {
3901         .name = "myri10ge",
3902         .probe = myri10ge_probe,
3903         .remove = myri10ge_remove,
3904         .id_table = myri10ge_pci_tbl,
3905 #ifdef CONFIG_PM
3906         .suspend = myri10ge_suspend,
3907         .resume = myri10ge_resume,
3908 #endif
3909 };
3910
3911 #ifdef CONFIG_DCA
3912 static int
3913 myri10ge_notify_dca(struct notifier_block *nb, unsigned long event, void *p)
3914 {
3915         int err = driver_for_each_device(&myri10ge_driver.driver,
3916                                          NULL, &event,
3917                                          myri10ge_notify_dca_device);
3918
3919         if (err)
3920                 return NOTIFY_BAD;
3921         return NOTIFY_DONE;
3922 }
3923
3924 static struct notifier_block myri10ge_dca_notifier = {
3925         .notifier_call = myri10ge_notify_dca,
3926         .next = NULL,
3927         .priority = 0,
3928 };
3929 #endif                          /* CONFIG_DCA */
3930
3931 static __init int myri10ge_init_module(void)
3932 {
3933         printk(KERN_INFO "%s: Version %s\n", myri10ge_driver.name,
3934                MYRI10GE_VERSION_STR);
3935
3936         if (myri10ge_rss_hash > MXGEFW_RSS_HASH_TYPE_SRC_PORT ||
3937             myri10ge_rss_hash < MXGEFW_RSS_HASH_TYPE_IPV4) {
3938                 printk(KERN_ERR
3939                        "%s: Illegal rssh hash type %d, defaulting to source port\n",
3940                        myri10ge_driver.name, myri10ge_rss_hash);
3941                 myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT;
3942         }
3943 #ifdef CONFIG_DCA
3944         dca_register_notify(&myri10ge_dca_notifier);
3945 #endif
3946
3947         return pci_register_driver(&myri10ge_driver);
3948 }
3949
3950 module_init(myri10ge_init_module);
3951
3952 static __exit void myri10ge_cleanup_module(void)
3953 {
3954 #ifdef CONFIG_DCA
3955         dca_unregister_notify(&myri10ge_dca_notifier);
3956 #endif
3957         pci_unregister_driver(&myri10ge_driver);
3958 }
3959
3960 module_exit(myri10ge_cleanup_module);