1 /************************************************************************* 2 * myri10ge.c: Myricom Myri-10G Ethernet driver. 3 * 4 * Copyright (C) 2005 - 2011 Myricom, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of Myricom, Inc. nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 * 31 * 32 * If the eeprom on your board is not recent enough, you will need to get a 33 * newer firmware image at: 34 * http://www.myri.com/scs/download-Myri10GE.html 35 * 36 * Contact Information: 37 * <help@myri.com> 38 * Myricom, Inc., 325N Santa Anita Avenue, Arcadia, CA 91006 39 *************************************************************************/ 40 41 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 42 43 #include <linux/tcp.h> 44 #include <linux/netdevice.h> 45 #include <linux/skbuff.h> 46 #include <linux/string.h> 47 #include <linux/module.h> 48 #include <linux/pci.h> 49 #include <linux/dma-mapping.h> 50 #include <linux/etherdevice.h> 51 #include <linux/if_ether.h> 52 #include <linux/if_vlan.h> 53 #include <linux/dca.h> 54 #include <linux/ip.h> 55 #include <linux/inet.h> 56 #include <linux/in.h> 57 #include <linux/ethtool.h> 58 #include <linux/firmware.h> 59 #include <linux/delay.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 <linux/slab.h> 67 #include <linux/prefetch.h> 68 #include <net/checksum.h> 69 #include <net/ip.h> 70 #include <net/tcp.h> 71 #include <asm/byteorder.h> 72 #include <asm/io.h> 73 #include <asm/processor.h> 74 #ifdef CONFIG_MTRR 75 #include <asm/mtrr.h> 76 #endif 77 #include <net/busy_poll.h> 78 79 #include "myri10ge_mcp.h" 80 #include "myri10ge_mcp_gen_header.h" 81 82 #define MYRI10GE_VERSION_STR "1.5.3-1.534" 83 84 MODULE_DESCRIPTION("Myricom 10G driver (10GbE)"); 85 MODULE_AUTHOR("Maintainer: help@myri.com"); 86 MODULE_VERSION(MYRI10GE_VERSION_STR); 87 MODULE_LICENSE("Dual BSD/GPL"); 88 89 #define MYRI10GE_MAX_ETHER_MTU 9014 90 91 #define MYRI10GE_ETH_STOPPED 0 92 #define MYRI10GE_ETH_STOPPING 1 93 #define MYRI10GE_ETH_STARTING 2 94 #define MYRI10GE_ETH_RUNNING 3 95 #define MYRI10GE_ETH_OPEN_FAILED 4 96 97 #define MYRI10GE_EEPROM_STRINGS_SIZE 256 98 #define MYRI10GE_MAX_SEND_DESC_TSO ((65536 / 2048) * 2) 99 100 #define MYRI10GE_NO_CONFIRM_DATA htonl(0xffffffff) 101 #define MYRI10GE_NO_RESPONSE_RESULT 0xffffffff 102 103 #define MYRI10GE_ALLOC_ORDER 0 104 #define MYRI10GE_ALLOC_SIZE ((1 << MYRI10GE_ALLOC_ORDER) * PAGE_SIZE) 105 #define MYRI10GE_MAX_FRAGS_PER_FRAME (MYRI10GE_MAX_ETHER_MTU/MYRI10GE_ALLOC_SIZE + 1) 106 107 #define MYRI10GE_MAX_SLICES 32 108 109 struct myri10ge_rx_buffer_state { 110 struct page *page; 111 int page_offset; 112 DEFINE_DMA_UNMAP_ADDR(bus); 113 DEFINE_DMA_UNMAP_LEN(len); 114 }; 115 116 struct myri10ge_tx_buffer_state { 117 struct sk_buff *skb; 118 int last; 119 DEFINE_DMA_UNMAP_ADDR(bus); 120 DEFINE_DMA_UNMAP_LEN(len); 121 }; 122 123 struct myri10ge_cmd { 124 u32 data0; 125 u32 data1; 126 u32 data2; 127 }; 128 129 struct myri10ge_rx_buf { 130 struct mcp_kreq_ether_recv __iomem *lanai; /* lanai ptr for recv ring */ 131 struct mcp_kreq_ether_recv *shadow; /* host shadow of recv ring */ 132 struct myri10ge_rx_buffer_state *info; 133 struct page *page; 134 dma_addr_t bus; 135 int page_offset; 136 int cnt; 137 int fill_cnt; 138 int alloc_fail; 139 int mask; /* number of rx slots -1 */ 140 int watchdog_needed; 141 }; 142 143 struct myri10ge_tx_buf { 144 struct mcp_kreq_ether_send __iomem *lanai; /* lanai ptr for sendq */ 145 __be32 __iomem *send_go; /* "go" doorbell ptr */ 146 __be32 __iomem *send_stop; /* "stop" doorbell ptr */ 147 struct mcp_kreq_ether_send *req_list; /* host shadow of sendq */ 148 char *req_bytes; 149 struct myri10ge_tx_buffer_state *info; 150 int mask; /* number of transmit slots -1 */ 151 int req ____cacheline_aligned; /* transmit slots submitted */ 152 int pkt_start; /* packets started */ 153 int stop_queue; 154 int linearized; 155 int done ____cacheline_aligned; /* transmit slots completed */ 156 int pkt_done; /* packets completed */ 157 int wake_queue; 158 int queue_active; 159 }; 160 161 struct myri10ge_rx_done { 162 struct mcp_slot *entry; 163 dma_addr_t bus; 164 int cnt; 165 int idx; 166 }; 167 168 struct myri10ge_slice_netstats { 169 unsigned long rx_packets; 170 unsigned long tx_packets; 171 unsigned long rx_bytes; 172 unsigned long tx_bytes; 173 unsigned long rx_dropped; 174 unsigned long tx_dropped; 175 }; 176 177 struct myri10ge_slice_state { 178 struct myri10ge_tx_buf tx; /* transmit ring */ 179 struct myri10ge_rx_buf rx_small; 180 struct myri10ge_rx_buf rx_big; 181 struct myri10ge_rx_done rx_done; 182 struct net_device *dev; 183 struct napi_struct napi; 184 struct myri10ge_priv *mgp; 185 struct myri10ge_slice_netstats stats; 186 __be32 __iomem *irq_claim; 187 struct mcp_irq_data *fw_stats; 188 dma_addr_t fw_stats_bus; 189 int watchdog_tx_done; 190 int watchdog_tx_req; 191 int watchdog_rx_done; 192 int stuck; 193 #ifdef CONFIG_MYRI10GE_DCA 194 int cached_dca_tag; 195 int cpu; 196 __be32 __iomem *dca_tag; 197 #endif 198 #ifdef CONFIG_NET_RX_BUSY_POLL 199 unsigned int state; 200 #define SLICE_STATE_IDLE 0 201 #define SLICE_STATE_NAPI 1 /* NAPI owns this slice */ 202 #define SLICE_STATE_POLL 2 /* poll owns this slice */ 203 #define SLICE_LOCKED (SLICE_STATE_NAPI | SLICE_STATE_POLL) 204 #define SLICE_STATE_NAPI_YIELD 4 /* NAPI yielded this slice */ 205 #define SLICE_STATE_POLL_YIELD 8 /* poll yielded this slice */ 206 #define SLICE_USER_PEND (SLICE_STATE_POLL | SLICE_STATE_POLL_YIELD) 207 spinlock_t lock; 208 unsigned long lock_napi_yield; 209 unsigned long lock_poll_yield; 210 unsigned long busy_poll_miss; 211 unsigned long busy_poll_cnt; 212 #endif /* CONFIG_NET_RX_BUSY_POLL */ 213 char irq_desc[32]; 214 }; 215 216 struct myri10ge_priv { 217 struct myri10ge_slice_state *ss; 218 int tx_boundary; /* boundary transmits cannot cross */ 219 int num_slices; 220 int running; /* running? */ 221 int small_bytes; 222 int big_bytes; 223 int max_intr_slots; 224 struct net_device *dev; 225 u8 __iomem *sram; 226 int sram_size; 227 unsigned long board_span; 228 unsigned long iomem_base; 229 __be32 __iomem *irq_deassert; 230 char *mac_addr_string; 231 struct mcp_cmd_response *cmd; 232 dma_addr_t cmd_bus; 233 struct pci_dev *pdev; 234 int msi_enabled; 235 int msix_enabled; 236 struct msix_entry *msix_vectors; 237 #ifdef CONFIG_MYRI10GE_DCA 238 int dca_enabled; 239 int relaxed_order; 240 #endif 241 u32 link_state; 242 unsigned int rdma_tags_available; 243 int intr_coal_delay; 244 __be32 __iomem *intr_coal_delay_ptr; 245 int mtrr; 246 int wc_enabled; 247 int down_cnt; 248 wait_queue_head_t down_wq; 249 struct work_struct watchdog_work; 250 struct timer_list watchdog_timer; 251 int watchdog_resets; 252 int watchdog_pause; 253 int pause; 254 bool fw_name_allocated; 255 char *fw_name; 256 char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE]; 257 char *product_code_string; 258 char fw_version[128]; 259 int fw_ver_major; 260 int fw_ver_minor; 261 int fw_ver_tiny; 262 int adopted_rx_filter_bug; 263 u8 mac_addr[ETH_ALEN]; /* eeprom mac address */ 264 unsigned long serial_number; 265 int vendor_specific_offset; 266 int fw_multicast_support; 267 u32 features; 268 u32 max_tso6; 269 u32 read_dma; 270 u32 write_dma; 271 u32 read_write_dma; 272 u32 link_changes; 273 u32 msg_enable; 274 unsigned int board_number; 275 int rebooted; 276 }; 277 278 static char *myri10ge_fw_unaligned = "myri10ge_ethp_z8e.dat"; 279 static char *myri10ge_fw_aligned = "myri10ge_eth_z8e.dat"; 280 static char *myri10ge_fw_rss_unaligned = "myri10ge_rss_ethp_z8e.dat"; 281 static char *myri10ge_fw_rss_aligned = "myri10ge_rss_eth_z8e.dat"; 282 MODULE_FIRMWARE("myri10ge_ethp_z8e.dat"); 283 MODULE_FIRMWARE("myri10ge_eth_z8e.dat"); 284 MODULE_FIRMWARE("myri10ge_rss_ethp_z8e.dat"); 285 MODULE_FIRMWARE("myri10ge_rss_eth_z8e.dat"); 286 287 /* Careful: must be accessed under kparam_block_sysfs_write */ 288 static char *myri10ge_fw_name = NULL; 289 module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR); 290 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name"); 291 292 #define MYRI10GE_MAX_BOARDS 8 293 static char *myri10ge_fw_names[MYRI10GE_MAX_BOARDS] = 294 {[0 ... (MYRI10GE_MAX_BOARDS - 1)] = NULL }; 295 module_param_array_named(myri10ge_fw_names, myri10ge_fw_names, charp, NULL, 296 0444); 297 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image names per board"); 298 299 static int myri10ge_ecrc_enable = 1; 300 module_param(myri10ge_ecrc_enable, int, S_IRUGO); 301 MODULE_PARM_DESC(myri10ge_ecrc_enable, "Enable Extended CRC on PCI-E"); 302 303 static int myri10ge_small_bytes = -1; /* -1 == auto */ 304 module_param(myri10ge_small_bytes, int, S_IRUGO | S_IWUSR); 305 MODULE_PARM_DESC(myri10ge_small_bytes, "Threshold of small packets"); 306 307 static int myri10ge_msi = 1; /* enable msi by default */ 308 module_param(myri10ge_msi, int, S_IRUGO | S_IWUSR); 309 MODULE_PARM_DESC(myri10ge_msi, "Enable Message Signalled Interrupts"); 310 311 static int myri10ge_intr_coal_delay = 75; 312 module_param(myri10ge_intr_coal_delay, int, S_IRUGO); 313 MODULE_PARM_DESC(myri10ge_intr_coal_delay, "Interrupt coalescing delay"); 314 315 static int myri10ge_flow_control = 1; 316 module_param(myri10ge_flow_control, int, S_IRUGO); 317 MODULE_PARM_DESC(myri10ge_flow_control, "Pause parameter"); 318 319 static int myri10ge_deassert_wait = 1; 320 module_param(myri10ge_deassert_wait, int, S_IRUGO | S_IWUSR); 321 MODULE_PARM_DESC(myri10ge_deassert_wait, 322 "Wait when deasserting legacy interrupts"); 323 324 static int myri10ge_force_firmware = 0; 325 module_param(myri10ge_force_firmware, int, S_IRUGO); 326 MODULE_PARM_DESC(myri10ge_force_firmware, 327 "Force firmware to assume aligned completions"); 328 329 static int myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN; 330 module_param(myri10ge_initial_mtu, int, S_IRUGO); 331 MODULE_PARM_DESC(myri10ge_initial_mtu, "Initial MTU"); 332 333 static int myri10ge_napi_weight = 64; 334 module_param(myri10ge_napi_weight, int, S_IRUGO); 335 MODULE_PARM_DESC(myri10ge_napi_weight, "Set NAPI weight"); 336 337 static int myri10ge_watchdog_timeout = 1; 338 module_param(myri10ge_watchdog_timeout, int, S_IRUGO); 339 MODULE_PARM_DESC(myri10ge_watchdog_timeout, "Set watchdog timeout"); 340 341 static int myri10ge_max_irq_loops = 1048576; 342 module_param(myri10ge_max_irq_loops, int, S_IRUGO); 343 MODULE_PARM_DESC(myri10ge_max_irq_loops, 344 "Set stuck legacy IRQ detection threshold"); 345 346 #define MYRI10GE_MSG_DEFAULT NETIF_MSG_LINK 347 348 static int myri10ge_debug = -1; /* defaults above */ 349 module_param(myri10ge_debug, int, 0); 350 MODULE_PARM_DESC(myri10ge_debug, "Debug level (0=none,...,16=all)"); 351 352 static int myri10ge_fill_thresh = 256; 353 module_param(myri10ge_fill_thresh, int, S_IRUGO | S_IWUSR); 354 MODULE_PARM_DESC(myri10ge_fill_thresh, "Number of empty rx slots allowed"); 355 356 static int myri10ge_reset_recover = 1; 357 358 static int myri10ge_max_slices = 1; 359 module_param(myri10ge_max_slices, int, S_IRUGO); 360 MODULE_PARM_DESC(myri10ge_max_slices, "Max tx/rx queues"); 361 362 static int myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_DST_PORT; 363 module_param(myri10ge_rss_hash, int, S_IRUGO); 364 MODULE_PARM_DESC(myri10ge_rss_hash, "Type of RSS hashing to do"); 365 366 static int myri10ge_dca = 1; 367 module_param(myri10ge_dca, int, S_IRUGO); 368 MODULE_PARM_DESC(myri10ge_dca, "Enable DCA if possible"); 369 370 #define MYRI10GE_FW_OFFSET 1024*1024 371 #define MYRI10GE_HIGHPART_TO_U32(X) \ 372 (sizeof (X) == 8) ? ((u32)((u64)(X) >> 32)) : (0) 373 #define MYRI10GE_LOWPART_TO_U32(X) ((u32)(X)) 374 375 #define myri10ge_pio_copy(to,from,size) __iowrite64_copy(to,from,size/8) 376 377 static void myri10ge_set_multicast_list(struct net_device *dev); 378 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb, 379 struct net_device *dev); 380 381 static inline void put_be32(__be32 val, __be32 __iomem * p) 382 { 383 __raw_writel((__force __u32) val, (__force void __iomem *)p); 384 } 385 386 static struct rtnl_link_stats64 *myri10ge_get_stats(struct net_device *dev, 387 struct rtnl_link_stats64 *stats); 388 389 static void set_fw_name(struct myri10ge_priv *mgp, char *name, bool allocated) 390 { 391 if (mgp->fw_name_allocated) 392 kfree(mgp->fw_name); 393 mgp->fw_name = name; 394 mgp->fw_name_allocated = allocated; 395 } 396 397 static int 398 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd, 399 struct myri10ge_cmd *data, int atomic) 400 { 401 struct mcp_cmd *buf; 402 char buf_bytes[sizeof(*buf) + 8]; 403 struct mcp_cmd_response *response = mgp->cmd; 404 char __iomem *cmd_addr = mgp->sram + MXGEFW_ETH_CMD; 405 u32 dma_low, dma_high, result, value; 406 int sleep_total = 0; 407 408 /* ensure buf is aligned to 8 bytes */ 409 buf = (struct mcp_cmd *)ALIGN((unsigned long)buf_bytes, 8); 410 411 buf->data0 = htonl(data->data0); 412 buf->data1 = htonl(data->data1); 413 buf->data2 = htonl(data->data2); 414 buf->cmd = htonl(cmd); 415 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus); 416 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus); 417 418 buf->response_addr.low = htonl(dma_low); 419 buf->response_addr.high = htonl(dma_high); 420 response->result = htonl(MYRI10GE_NO_RESPONSE_RESULT); 421 mb(); 422 myri10ge_pio_copy(cmd_addr, buf, sizeof(*buf)); 423 424 /* wait up to 15ms. Longest command is the DMA benchmark, 425 * which is capped at 5ms, but runs from a timeout handler 426 * that runs every 7.8ms. So a 15ms timeout leaves us with 427 * a 2.2ms margin 428 */ 429 if (atomic) { 430 /* if atomic is set, do not sleep, 431 * and try to get the completion quickly 432 * (1ms will be enough for those commands) */ 433 for (sleep_total = 0; 434 sleep_total < 1000 && 435 response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT); 436 sleep_total += 10) { 437 udelay(10); 438 mb(); 439 } 440 } else { 441 /* use msleep for most command */ 442 for (sleep_total = 0; 443 sleep_total < 15 && 444 response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT); 445 sleep_total++) 446 msleep(1); 447 } 448 449 result = ntohl(response->result); 450 value = ntohl(response->data); 451 if (result != MYRI10GE_NO_RESPONSE_RESULT) { 452 if (result == 0) { 453 data->data0 = value; 454 return 0; 455 } else if (result == MXGEFW_CMD_UNKNOWN) { 456 return -ENOSYS; 457 } else if (result == MXGEFW_CMD_ERROR_UNALIGNED) { 458 return -E2BIG; 459 } else if (result == MXGEFW_CMD_ERROR_RANGE && 460 cmd == MXGEFW_CMD_ENABLE_RSS_QUEUES && 461 (data-> 462 data1 & MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES) != 463 0) { 464 return -ERANGE; 465 } else { 466 dev_err(&mgp->pdev->dev, 467 "command %d failed, result = %d\n", 468 cmd, result); 469 return -ENXIO; 470 } 471 } 472 473 dev_err(&mgp->pdev->dev, "command %d timed out, result = %d\n", 474 cmd, result); 475 return -EAGAIN; 476 } 477 478 /* 479 * The eeprom strings on the lanaiX have the format 480 * SN=x\0 481 * MAC=x:x:x:x:x:x\0 482 * PT:ddd mmm xx xx:xx:xx xx\0 483 * PV:ddd mmm xx xx:xx:xx xx\0 484 */ 485 static int myri10ge_read_mac_addr(struct myri10ge_priv *mgp) 486 { 487 char *ptr, *limit; 488 int i; 489 490 ptr = mgp->eeprom_strings; 491 limit = mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE; 492 493 while (*ptr != '\0' && ptr < limit) { 494 if (memcmp(ptr, "MAC=", 4) == 0) { 495 ptr += 4; 496 mgp->mac_addr_string = ptr; 497 for (i = 0; i < 6; i++) { 498 if ((ptr + 2) > limit) 499 goto abort; 500 mgp->mac_addr[i] = 501 simple_strtoul(ptr, &ptr, 16); 502 ptr += 1; 503 } 504 } 505 if (memcmp(ptr, "PC=", 3) == 0) { 506 ptr += 3; 507 mgp->product_code_string = ptr; 508 } 509 if (memcmp((const void *)ptr, "SN=", 3) == 0) { 510 ptr += 3; 511 mgp->serial_number = simple_strtoul(ptr, &ptr, 10); 512 } 513 while (ptr < limit && *ptr++) ; 514 } 515 516 return 0; 517 518 abort: 519 dev_err(&mgp->pdev->dev, "failed to parse eeprom_strings\n"); 520 return -ENXIO; 521 } 522 523 /* 524 * Enable or disable periodic RDMAs from the host to make certain 525 * chipsets resend dropped PCIe messages 526 */ 527 528 static void myri10ge_dummy_rdma(struct myri10ge_priv *mgp, int enable) 529 { 530 char __iomem *submit; 531 __be32 buf[16] __attribute__ ((__aligned__(8))); 532 u32 dma_low, dma_high; 533 int i; 534 535 /* clear confirmation addr */ 536 mgp->cmd->data = 0; 537 mb(); 538 539 /* send a rdma command to the PCIe engine, and wait for the 540 * response in the confirmation address. The firmware should 541 * write a -1 there to indicate it is alive and well 542 */ 543 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus); 544 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus); 545 546 buf[0] = htonl(dma_high); /* confirm addr MSW */ 547 buf[1] = htonl(dma_low); /* confirm addr LSW */ 548 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */ 549 buf[3] = htonl(dma_high); /* dummy addr MSW */ 550 buf[4] = htonl(dma_low); /* dummy addr LSW */ 551 buf[5] = htonl(enable); /* enable? */ 552 553 submit = mgp->sram + MXGEFW_BOOT_DUMMY_RDMA; 554 555 myri10ge_pio_copy(submit, &buf, sizeof(buf)); 556 for (i = 0; mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 20; i++) 557 msleep(1); 558 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) 559 dev_err(&mgp->pdev->dev, "dummy rdma %s failed\n", 560 (enable ? "enable" : "disable")); 561 } 562 563 static int 564 myri10ge_validate_firmware(struct myri10ge_priv *mgp, 565 struct mcp_gen_header *hdr) 566 { 567 struct device *dev = &mgp->pdev->dev; 568 569 /* check firmware type */ 570 if (ntohl(hdr->mcp_type) != MCP_TYPE_ETH) { 571 dev_err(dev, "Bad firmware type: 0x%x\n", ntohl(hdr->mcp_type)); 572 return -EINVAL; 573 } 574 575 /* save firmware version for ethtool */ 576 strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version)); 577 578 sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major, 579 &mgp->fw_ver_minor, &mgp->fw_ver_tiny); 580 581 if (!(mgp->fw_ver_major == MXGEFW_VERSION_MAJOR && 582 mgp->fw_ver_minor == MXGEFW_VERSION_MINOR)) { 583 dev_err(dev, "Found firmware version %s\n", mgp->fw_version); 584 dev_err(dev, "Driver needs %d.%d\n", MXGEFW_VERSION_MAJOR, 585 MXGEFW_VERSION_MINOR); 586 return -EINVAL; 587 } 588 return 0; 589 } 590 591 static int myri10ge_load_hotplug_firmware(struct myri10ge_priv *mgp, u32 * size) 592 { 593 unsigned crc, reread_crc; 594 const struct firmware *fw; 595 struct device *dev = &mgp->pdev->dev; 596 unsigned char *fw_readback; 597 struct mcp_gen_header *hdr; 598 size_t hdr_offset; 599 int status; 600 unsigned i; 601 602 if ((status = request_firmware(&fw, mgp->fw_name, dev)) < 0) { 603 dev_err(dev, "Unable to load %s firmware image via hotplug\n", 604 mgp->fw_name); 605 status = -EINVAL; 606 goto abort_with_nothing; 607 } 608 609 /* check size */ 610 611 if (fw->size >= mgp->sram_size - MYRI10GE_FW_OFFSET || 612 fw->size < MCP_HEADER_PTR_OFFSET + 4) { 613 dev_err(dev, "Firmware size invalid:%d\n", (int)fw->size); 614 status = -EINVAL; 615 goto abort_with_fw; 616 } 617 618 /* check id */ 619 hdr_offset = ntohl(*(__be32 *) (fw->data + MCP_HEADER_PTR_OFFSET)); 620 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > fw->size) { 621 dev_err(dev, "Bad firmware file\n"); 622 status = -EINVAL; 623 goto abort_with_fw; 624 } 625 hdr = (void *)(fw->data + hdr_offset); 626 627 status = myri10ge_validate_firmware(mgp, hdr); 628 if (status != 0) 629 goto abort_with_fw; 630 631 crc = crc32(~0, fw->data, fw->size); 632 for (i = 0; i < fw->size; i += 256) { 633 myri10ge_pio_copy(mgp->sram + MYRI10GE_FW_OFFSET + i, 634 fw->data + i, 635 min(256U, (unsigned)(fw->size - i))); 636 mb(); 637 readb(mgp->sram); 638 } 639 fw_readback = vmalloc(fw->size); 640 if (!fw_readback) { 641 status = -ENOMEM; 642 goto abort_with_fw; 643 } 644 /* corruption checking is good for parity recovery and buggy chipset */ 645 memcpy_fromio(fw_readback, mgp->sram + MYRI10GE_FW_OFFSET, fw->size); 646 reread_crc = crc32(~0, fw_readback, fw->size); 647 vfree(fw_readback); 648 if (crc != reread_crc) { 649 dev_err(dev, "CRC failed(fw-len=%u), got 0x%x (expect 0x%x)\n", 650 (unsigned)fw->size, reread_crc, crc); 651 status = -EIO; 652 goto abort_with_fw; 653 } 654 *size = (u32) fw->size; 655 656 abort_with_fw: 657 release_firmware(fw); 658 659 abort_with_nothing: 660 return status; 661 } 662 663 static int myri10ge_adopt_running_firmware(struct myri10ge_priv *mgp) 664 { 665 struct mcp_gen_header *hdr; 666 struct device *dev = &mgp->pdev->dev; 667 const size_t bytes = sizeof(struct mcp_gen_header); 668 size_t hdr_offset; 669 int status; 670 671 /* find running firmware header */ 672 hdr_offset = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET)); 673 674 if ((hdr_offset & 3) || hdr_offset + sizeof(*hdr) > mgp->sram_size) { 675 dev_err(dev, "Running firmware has bad header offset (%d)\n", 676 (int)hdr_offset); 677 return -EIO; 678 } 679 680 /* copy header of running firmware from SRAM to host memory to 681 * validate firmware */ 682 hdr = kmalloc(bytes, GFP_KERNEL); 683 if (hdr == NULL) 684 return -ENOMEM; 685 686 memcpy_fromio(hdr, mgp->sram + hdr_offset, bytes); 687 status = myri10ge_validate_firmware(mgp, hdr); 688 kfree(hdr); 689 690 /* check to see if adopted firmware has bug where adopting 691 * it will cause broadcasts to be filtered unless the NIC 692 * is kept in ALLMULTI mode */ 693 if (mgp->fw_ver_major == 1 && mgp->fw_ver_minor == 4 && 694 mgp->fw_ver_tiny >= 4 && mgp->fw_ver_tiny <= 11) { 695 mgp->adopted_rx_filter_bug = 1; 696 dev_warn(dev, "Adopting fw %d.%d.%d: " 697 "working around rx filter bug\n", 698 mgp->fw_ver_major, mgp->fw_ver_minor, 699 mgp->fw_ver_tiny); 700 } 701 return status; 702 } 703 704 static int myri10ge_get_firmware_capabilities(struct myri10ge_priv *mgp) 705 { 706 struct myri10ge_cmd cmd; 707 int status; 708 709 /* probe for IPv6 TSO support */ 710 mgp->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO; 711 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_TSO6_HDR_SIZE, 712 &cmd, 0); 713 if (status == 0) { 714 mgp->max_tso6 = cmd.data0; 715 mgp->features |= NETIF_F_TSO6; 716 } 717 718 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0); 719 if (status != 0) { 720 dev_err(&mgp->pdev->dev, 721 "failed MXGEFW_CMD_GET_RX_RING_SIZE\n"); 722 return -ENXIO; 723 } 724 725 mgp->max_intr_slots = 2 * (cmd.data0 / sizeof(struct mcp_dma_addr)); 726 727 return 0; 728 } 729 730 static int myri10ge_load_firmware(struct myri10ge_priv *mgp, int adopt) 731 { 732 char __iomem *submit; 733 __be32 buf[16] __attribute__ ((__aligned__(8))); 734 u32 dma_low, dma_high, size; 735 int status, i; 736 737 size = 0; 738 status = myri10ge_load_hotplug_firmware(mgp, &size); 739 if (status) { 740 if (!adopt) 741 return status; 742 dev_warn(&mgp->pdev->dev, "hotplug firmware loading failed\n"); 743 744 /* Do not attempt to adopt firmware if there 745 * was a bad crc */ 746 if (status == -EIO) 747 return status; 748 749 status = myri10ge_adopt_running_firmware(mgp); 750 if (status != 0) { 751 dev_err(&mgp->pdev->dev, 752 "failed to adopt running firmware\n"); 753 return status; 754 } 755 dev_info(&mgp->pdev->dev, 756 "Successfully adopted running firmware\n"); 757 if (mgp->tx_boundary == 4096) { 758 dev_warn(&mgp->pdev->dev, 759 "Using firmware currently running on NIC" 760 ". For optimal\n"); 761 dev_warn(&mgp->pdev->dev, 762 "performance consider loading optimized " 763 "firmware\n"); 764 dev_warn(&mgp->pdev->dev, "via hotplug\n"); 765 } 766 767 set_fw_name(mgp, "adopted", false); 768 mgp->tx_boundary = 2048; 769 myri10ge_dummy_rdma(mgp, 1); 770 status = myri10ge_get_firmware_capabilities(mgp); 771 return status; 772 } 773 774 /* clear confirmation addr */ 775 mgp->cmd->data = 0; 776 mb(); 777 778 /* send a reload command to the bootstrap MCP, and wait for the 779 * response in the confirmation address. The firmware should 780 * write a -1 there to indicate it is alive and well 781 */ 782 dma_low = MYRI10GE_LOWPART_TO_U32(mgp->cmd_bus); 783 dma_high = MYRI10GE_HIGHPART_TO_U32(mgp->cmd_bus); 784 785 buf[0] = htonl(dma_high); /* confirm addr MSW */ 786 buf[1] = htonl(dma_low); /* confirm addr LSW */ 787 buf[2] = MYRI10GE_NO_CONFIRM_DATA; /* confirm data */ 788 789 /* FIX: All newest firmware should un-protect the bottom of 790 * the sram before handoff. However, the very first interfaces 791 * do not. Therefore the handoff copy must skip the first 8 bytes 792 */ 793 buf[3] = htonl(MYRI10GE_FW_OFFSET + 8); /* where the code starts */ 794 buf[4] = htonl(size - 8); /* length of code */ 795 buf[5] = htonl(8); /* where to copy to */ 796 buf[6] = htonl(0); /* where to jump to */ 797 798 submit = mgp->sram + MXGEFW_BOOT_HANDOFF; 799 800 myri10ge_pio_copy(submit, &buf, sizeof(buf)); 801 mb(); 802 msleep(1); 803 mb(); 804 i = 0; 805 while (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA && i < 9) { 806 msleep(1 << i); 807 i++; 808 } 809 if (mgp->cmd->data != MYRI10GE_NO_CONFIRM_DATA) { 810 dev_err(&mgp->pdev->dev, "handoff failed\n"); 811 return -ENXIO; 812 } 813 myri10ge_dummy_rdma(mgp, 1); 814 status = myri10ge_get_firmware_capabilities(mgp); 815 816 return status; 817 } 818 819 static int myri10ge_update_mac_address(struct myri10ge_priv *mgp, u8 * addr) 820 { 821 struct myri10ge_cmd cmd; 822 int status; 823 824 cmd.data0 = ((addr[0] << 24) | (addr[1] << 16) 825 | (addr[2] << 8) | addr[3]); 826 827 cmd.data1 = ((addr[4] << 8) | (addr[5])); 828 829 status = myri10ge_send_cmd(mgp, MXGEFW_SET_MAC_ADDRESS, &cmd, 0); 830 return status; 831 } 832 833 static int myri10ge_change_pause(struct myri10ge_priv *mgp, int pause) 834 { 835 struct myri10ge_cmd cmd; 836 int status, ctl; 837 838 ctl = pause ? MXGEFW_ENABLE_FLOW_CONTROL : MXGEFW_DISABLE_FLOW_CONTROL; 839 status = myri10ge_send_cmd(mgp, ctl, &cmd, 0); 840 841 if (status) { 842 netdev_err(mgp->dev, "Failed to set flow control mode\n"); 843 return status; 844 } 845 mgp->pause = pause; 846 return 0; 847 } 848 849 static void 850 myri10ge_change_promisc(struct myri10ge_priv *mgp, int promisc, int atomic) 851 { 852 struct myri10ge_cmd cmd; 853 int status, ctl; 854 855 ctl = promisc ? MXGEFW_ENABLE_PROMISC : MXGEFW_DISABLE_PROMISC; 856 status = myri10ge_send_cmd(mgp, ctl, &cmd, atomic); 857 if (status) 858 netdev_err(mgp->dev, "Failed to set promisc mode\n"); 859 } 860 861 static int myri10ge_dma_test(struct myri10ge_priv *mgp, int test_type) 862 { 863 struct myri10ge_cmd cmd; 864 int status; 865 u32 len; 866 struct page *dmatest_page; 867 dma_addr_t dmatest_bus; 868 char *test = " "; 869 870 dmatest_page = alloc_page(GFP_KERNEL); 871 if (!dmatest_page) 872 return -ENOMEM; 873 dmatest_bus = pci_map_page(mgp->pdev, dmatest_page, 0, PAGE_SIZE, 874 DMA_BIDIRECTIONAL); 875 876 /* Run a small DMA test. 877 * The magic multipliers to the length tell the firmware 878 * to do DMA read, write, or read+write tests. The 879 * results are returned in cmd.data0. The upper 16 880 * bits or the return is the number of transfers completed. 881 * The lower 16 bits is the time in 0.5us ticks that the 882 * transfers took to complete. 883 */ 884 885 len = mgp->tx_boundary; 886 887 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus); 888 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus); 889 cmd.data2 = len * 0x10000; 890 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0); 891 if (status != 0) { 892 test = "read"; 893 goto abort; 894 } 895 mgp->read_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff); 896 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus); 897 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus); 898 cmd.data2 = len * 0x1; 899 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0); 900 if (status != 0) { 901 test = "write"; 902 goto abort; 903 } 904 mgp->write_dma = ((cmd.data0 >> 16) * len * 2) / (cmd.data0 & 0xffff); 905 906 cmd.data0 = MYRI10GE_LOWPART_TO_U32(dmatest_bus); 907 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(dmatest_bus); 908 cmd.data2 = len * 0x10001; 909 status = myri10ge_send_cmd(mgp, test_type, &cmd, 0); 910 if (status != 0) { 911 test = "read/write"; 912 goto abort; 913 } 914 mgp->read_write_dma = ((cmd.data0 >> 16) * len * 2 * 2) / 915 (cmd.data0 & 0xffff); 916 917 abort: 918 pci_unmap_page(mgp->pdev, dmatest_bus, PAGE_SIZE, DMA_BIDIRECTIONAL); 919 put_page(dmatest_page); 920 921 if (status != 0 && test_type != MXGEFW_CMD_UNALIGNED_TEST) 922 dev_warn(&mgp->pdev->dev, "DMA %s benchmark failed: %d\n", 923 test, status); 924 925 return status; 926 } 927 928 #ifdef CONFIG_NET_RX_BUSY_POLL 929 static inline void myri10ge_ss_init_lock(struct myri10ge_slice_state *ss) 930 { 931 spin_lock_init(&ss->lock); 932 ss->state = SLICE_STATE_IDLE; 933 } 934 935 static inline bool myri10ge_ss_lock_napi(struct myri10ge_slice_state *ss) 936 { 937 int rc = true; 938 spin_lock(&ss->lock); 939 if ((ss->state & SLICE_LOCKED)) { 940 WARN_ON((ss->state & SLICE_STATE_NAPI)); 941 ss->state |= SLICE_STATE_NAPI_YIELD; 942 rc = false; 943 ss->lock_napi_yield++; 944 } else 945 ss->state = SLICE_STATE_NAPI; 946 spin_unlock(&ss->lock); 947 return rc; 948 } 949 950 static inline void myri10ge_ss_unlock_napi(struct myri10ge_slice_state *ss) 951 { 952 spin_lock(&ss->lock); 953 WARN_ON((ss->state & (SLICE_STATE_POLL | SLICE_STATE_NAPI_YIELD))); 954 ss->state = SLICE_STATE_IDLE; 955 spin_unlock(&ss->lock); 956 } 957 958 static inline bool myri10ge_ss_lock_poll(struct myri10ge_slice_state *ss) 959 { 960 int rc = true; 961 spin_lock_bh(&ss->lock); 962 if ((ss->state & SLICE_LOCKED)) { 963 ss->state |= SLICE_STATE_POLL_YIELD; 964 rc = false; 965 ss->lock_poll_yield++; 966 } else 967 ss->state |= SLICE_STATE_POLL; 968 spin_unlock_bh(&ss->lock); 969 return rc; 970 } 971 972 static inline void myri10ge_ss_unlock_poll(struct myri10ge_slice_state *ss) 973 { 974 spin_lock_bh(&ss->lock); 975 WARN_ON((ss->state & SLICE_STATE_NAPI)); 976 ss->state = SLICE_STATE_IDLE; 977 spin_unlock_bh(&ss->lock); 978 } 979 980 static inline bool myri10ge_ss_busy_polling(struct myri10ge_slice_state *ss) 981 { 982 WARN_ON(!(ss->state & SLICE_LOCKED)); 983 return (ss->state & SLICE_USER_PEND); 984 } 985 #else /* CONFIG_NET_RX_BUSY_POLL */ 986 static inline void myri10ge_ss_init_lock(struct myri10ge_slice_state *ss) 987 { 988 } 989 990 static inline bool myri10ge_ss_lock_napi(struct myri10ge_slice_state *ss) 991 { 992 return false; 993 } 994 995 static inline void myri10ge_ss_unlock_napi(struct myri10ge_slice_state *ss) 996 { 997 } 998 999 static inline bool myri10ge_ss_lock_poll(struct myri10ge_slice_state *ss) 1000 { 1001 return false; 1002 } 1003 1004 static inline void myri10ge_ss_unlock_poll(struct myri10ge_slice_state *ss) 1005 { 1006 } 1007 1008 static inline bool myri10ge_ss_busy_polling(struct myri10ge_slice_state *ss) 1009 { 1010 return false; 1011 } 1012 #endif 1013 1014 static int myri10ge_reset(struct myri10ge_priv *mgp) 1015 { 1016 struct myri10ge_cmd cmd; 1017 struct myri10ge_slice_state *ss; 1018 int i, status; 1019 size_t bytes; 1020 #ifdef CONFIG_MYRI10GE_DCA 1021 unsigned long dca_tag_off; 1022 #endif 1023 1024 /* try to send a reset command to the card to see if it 1025 * is alive */ 1026 memset(&cmd, 0, sizeof(cmd)); 1027 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0); 1028 if (status != 0) { 1029 dev_err(&mgp->pdev->dev, "failed reset\n"); 1030 return -ENXIO; 1031 } 1032 1033 (void)myri10ge_dma_test(mgp, MXGEFW_DMA_TEST); 1034 /* 1035 * Use non-ndis mcp_slot (eg, 4 bytes total, 1036 * no toeplitz hash value returned. Older firmware will 1037 * not understand this command, but will use the correct 1038 * sized mcp_slot, so we ignore error returns 1039 */ 1040 cmd.data0 = MXGEFW_RSS_MCP_SLOT_TYPE_MIN; 1041 (void)myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_MCP_SLOT_TYPE, &cmd, 0); 1042 1043 /* Now exchange information about interrupts */ 1044 1045 bytes = mgp->max_intr_slots * sizeof(*mgp->ss[0].rx_done.entry); 1046 cmd.data0 = (u32) bytes; 1047 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0); 1048 1049 /* 1050 * Even though we already know how many slices are supported 1051 * via myri10ge_probe_slices() MXGEFW_CMD_GET_MAX_RSS_QUEUES 1052 * has magic side effects, and must be called after a reset. 1053 * It must be called prior to calling any RSS related cmds, 1054 * including assigning an interrupt queue for anything but 1055 * slice 0. It must also be called *after* 1056 * MXGEFW_CMD_SET_INTRQ_SIZE, since the intrq size is used by 1057 * the firmware to compute offsets. 1058 */ 1059 1060 if (mgp->num_slices > 1) { 1061 1062 /* ask the maximum number of slices it supports */ 1063 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES, 1064 &cmd, 0); 1065 if (status != 0) { 1066 dev_err(&mgp->pdev->dev, 1067 "failed to get number of slices\n"); 1068 } 1069 1070 /* 1071 * MXGEFW_CMD_ENABLE_RSS_QUEUES must be called prior 1072 * to setting up the interrupt queue DMA 1073 */ 1074 1075 cmd.data0 = mgp->num_slices; 1076 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE; 1077 if (mgp->dev->real_num_tx_queues > 1) 1078 cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES; 1079 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES, 1080 &cmd, 0); 1081 1082 /* Firmware older than 1.4.32 only supports multiple 1083 * RX queues, so if we get an error, first retry using a 1084 * single TX queue before giving up */ 1085 if (status != 0 && mgp->dev->real_num_tx_queues > 1) { 1086 netif_set_real_num_tx_queues(mgp->dev, 1); 1087 cmd.data0 = mgp->num_slices; 1088 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE; 1089 status = myri10ge_send_cmd(mgp, 1090 MXGEFW_CMD_ENABLE_RSS_QUEUES, 1091 &cmd, 0); 1092 } 1093 1094 if (status != 0) { 1095 dev_err(&mgp->pdev->dev, 1096 "failed to set number of slices\n"); 1097 1098 return status; 1099 } 1100 } 1101 for (i = 0; i < mgp->num_slices; i++) { 1102 ss = &mgp->ss[i]; 1103 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->rx_done.bus); 1104 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->rx_done.bus); 1105 cmd.data2 = i; 1106 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_DMA, 1107 &cmd, 0); 1108 } 1109 1110 status |= 1111 myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_ACK_OFFSET, &cmd, 0); 1112 for (i = 0; i < mgp->num_slices; i++) { 1113 ss = &mgp->ss[i]; 1114 ss->irq_claim = 1115 (__iomem __be32 *) (mgp->sram + cmd.data0 + 8 * i); 1116 } 1117 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_IRQ_DEASSERT_OFFSET, 1118 &cmd, 0); 1119 mgp->irq_deassert = (__iomem __be32 *) (mgp->sram + cmd.data0); 1120 1121 status |= myri10ge_send_cmd 1122 (mgp, MXGEFW_CMD_GET_INTR_COAL_DELAY_OFFSET, &cmd, 0); 1123 mgp->intr_coal_delay_ptr = (__iomem __be32 *) (mgp->sram + cmd.data0); 1124 if (status != 0) { 1125 dev_err(&mgp->pdev->dev, "failed set interrupt parameters\n"); 1126 return status; 1127 } 1128 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr); 1129 1130 #ifdef CONFIG_MYRI10GE_DCA 1131 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_DCA_OFFSET, &cmd, 0); 1132 dca_tag_off = cmd.data0; 1133 for (i = 0; i < mgp->num_slices; i++) { 1134 ss = &mgp->ss[i]; 1135 if (status == 0) { 1136 ss->dca_tag = (__iomem __be32 *) 1137 (mgp->sram + dca_tag_off + 4 * i); 1138 } else { 1139 ss->dca_tag = NULL; 1140 } 1141 } 1142 #endif /* CONFIG_MYRI10GE_DCA */ 1143 1144 /* reset mcp/driver shared state back to 0 */ 1145 1146 mgp->link_changes = 0; 1147 for (i = 0; i < mgp->num_slices; i++) { 1148 ss = &mgp->ss[i]; 1149 1150 memset(ss->rx_done.entry, 0, bytes); 1151 ss->tx.req = 0; 1152 ss->tx.done = 0; 1153 ss->tx.pkt_start = 0; 1154 ss->tx.pkt_done = 0; 1155 ss->rx_big.cnt = 0; 1156 ss->rx_small.cnt = 0; 1157 ss->rx_done.idx = 0; 1158 ss->rx_done.cnt = 0; 1159 ss->tx.wake_queue = 0; 1160 ss->tx.stop_queue = 0; 1161 } 1162 1163 status = myri10ge_update_mac_address(mgp, mgp->dev->dev_addr); 1164 myri10ge_change_pause(mgp, mgp->pause); 1165 myri10ge_set_multicast_list(mgp->dev); 1166 return status; 1167 } 1168 1169 #ifdef CONFIG_MYRI10GE_DCA 1170 static int myri10ge_toggle_relaxed(struct pci_dev *pdev, int on) 1171 { 1172 int ret; 1173 u16 ctl; 1174 1175 pcie_capability_read_word(pdev, PCI_EXP_DEVCTL, &ctl); 1176 1177 ret = (ctl & PCI_EXP_DEVCTL_RELAX_EN) >> 4; 1178 if (ret != on) { 1179 ctl &= ~PCI_EXP_DEVCTL_RELAX_EN; 1180 ctl |= (on << 4); 1181 pcie_capability_write_word(pdev, PCI_EXP_DEVCTL, ctl); 1182 } 1183 return ret; 1184 } 1185 1186 static void 1187 myri10ge_write_dca(struct myri10ge_slice_state *ss, int cpu, int tag) 1188 { 1189 ss->cached_dca_tag = tag; 1190 put_be32(htonl(tag), ss->dca_tag); 1191 } 1192 1193 static inline void myri10ge_update_dca(struct myri10ge_slice_state *ss) 1194 { 1195 int cpu = get_cpu(); 1196 int tag; 1197 1198 if (cpu != ss->cpu) { 1199 tag = dca3_get_tag(&ss->mgp->pdev->dev, cpu); 1200 if (ss->cached_dca_tag != tag) 1201 myri10ge_write_dca(ss, cpu, tag); 1202 ss->cpu = cpu; 1203 } 1204 put_cpu(); 1205 } 1206 1207 static void myri10ge_setup_dca(struct myri10ge_priv *mgp) 1208 { 1209 int err, i; 1210 struct pci_dev *pdev = mgp->pdev; 1211 1212 if (mgp->ss[0].dca_tag == NULL || mgp->dca_enabled) 1213 return; 1214 if (!myri10ge_dca) { 1215 dev_err(&pdev->dev, "dca disabled by administrator\n"); 1216 return; 1217 } 1218 err = dca_add_requester(&pdev->dev); 1219 if (err) { 1220 if (err != -ENODEV) 1221 dev_err(&pdev->dev, 1222 "dca_add_requester() failed, err=%d\n", err); 1223 return; 1224 } 1225 mgp->relaxed_order = myri10ge_toggle_relaxed(pdev, 0); 1226 mgp->dca_enabled = 1; 1227 for (i = 0; i < mgp->num_slices; i++) { 1228 mgp->ss[i].cpu = -1; 1229 mgp->ss[i].cached_dca_tag = -1; 1230 myri10ge_update_dca(&mgp->ss[i]); 1231 } 1232 } 1233 1234 static void myri10ge_teardown_dca(struct myri10ge_priv *mgp) 1235 { 1236 struct pci_dev *pdev = mgp->pdev; 1237 1238 if (!mgp->dca_enabled) 1239 return; 1240 mgp->dca_enabled = 0; 1241 if (mgp->relaxed_order) 1242 myri10ge_toggle_relaxed(pdev, 1); 1243 dca_remove_requester(&pdev->dev); 1244 } 1245 1246 static int myri10ge_notify_dca_device(struct device *dev, void *data) 1247 { 1248 struct myri10ge_priv *mgp; 1249 unsigned long event; 1250 1251 mgp = dev_get_drvdata(dev); 1252 event = *(unsigned long *)data; 1253 1254 if (event == DCA_PROVIDER_ADD) 1255 myri10ge_setup_dca(mgp); 1256 else if (event == DCA_PROVIDER_REMOVE) 1257 myri10ge_teardown_dca(mgp); 1258 return 0; 1259 } 1260 #endif /* CONFIG_MYRI10GE_DCA */ 1261 1262 static inline void 1263 myri10ge_submit_8rx(struct mcp_kreq_ether_recv __iomem * dst, 1264 struct mcp_kreq_ether_recv *src) 1265 { 1266 __be32 low; 1267 1268 low = src->addr_low; 1269 src->addr_low = htonl(DMA_BIT_MASK(32)); 1270 myri10ge_pio_copy(dst, src, 4 * sizeof(*src)); 1271 mb(); 1272 myri10ge_pio_copy(dst + 4, src + 4, 4 * sizeof(*src)); 1273 mb(); 1274 src->addr_low = low; 1275 put_be32(low, &dst->addr_low); 1276 mb(); 1277 } 1278 1279 static inline void myri10ge_vlan_ip_csum(struct sk_buff *skb, __wsum hw_csum) 1280 { 1281 struct vlan_hdr *vh = (struct vlan_hdr *)(skb->data); 1282 1283 if ((skb->protocol == htons(ETH_P_8021Q)) && 1284 (vh->h_vlan_encapsulated_proto == htons(ETH_P_IP) || 1285 vh->h_vlan_encapsulated_proto == htons(ETH_P_IPV6))) { 1286 skb->csum = hw_csum; 1287 skb->ip_summed = CHECKSUM_COMPLETE; 1288 } 1289 } 1290 1291 static void 1292 myri10ge_alloc_rx_pages(struct myri10ge_priv *mgp, struct myri10ge_rx_buf *rx, 1293 int bytes, int watchdog) 1294 { 1295 struct page *page; 1296 int idx; 1297 #if MYRI10GE_ALLOC_SIZE > 4096 1298 int end_offset; 1299 #endif 1300 1301 if (unlikely(rx->watchdog_needed && !watchdog)) 1302 return; 1303 1304 /* try to refill entire ring */ 1305 while (rx->fill_cnt != (rx->cnt + rx->mask + 1)) { 1306 idx = rx->fill_cnt & rx->mask; 1307 if (rx->page_offset + bytes <= MYRI10GE_ALLOC_SIZE) { 1308 /* we can use part of previous page */ 1309 get_page(rx->page); 1310 } else { 1311 /* we need a new page */ 1312 page = 1313 alloc_pages(GFP_ATOMIC | __GFP_COMP, 1314 MYRI10GE_ALLOC_ORDER); 1315 if (unlikely(page == NULL)) { 1316 if (rx->fill_cnt - rx->cnt < 16) 1317 rx->watchdog_needed = 1; 1318 return; 1319 } 1320 rx->page = page; 1321 rx->page_offset = 0; 1322 rx->bus = pci_map_page(mgp->pdev, page, 0, 1323 MYRI10GE_ALLOC_SIZE, 1324 PCI_DMA_FROMDEVICE); 1325 } 1326 rx->info[idx].page = rx->page; 1327 rx->info[idx].page_offset = rx->page_offset; 1328 /* note that this is the address of the start of the 1329 * page */ 1330 dma_unmap_addr_set(&rx->info[idx], bus, rx->bus); 1331 rx->shadow[idx].addr_low = 1332 htonl(MYRI10GE_LOWPART_TO_U32(rx->bus) + rx->page_offset); 1333 rx->shadow[idx].addr_high = 1334 htonl(MYRI10GE_HIGHPART_TO_U32(rx->bus)); 1335 1336 /* start next packet on a cacheline boundary */ 1337 rx->page_offset += SKB_DATA_ALIGN(bytes); 1338 1339 #if MYRI10GE_ALLOC_SIZE > 4096 1340 /* don't cross a 4KB boundary */ 1341 end_offset = rx->page_offset + bytes - 1; 1342 if ((unsigned)(rx->page_offset ^ end_offset) > 4095) 1343 rx->page_offset = end_offset & ~4095; 1344 #endif 1345 rx->fill_cnt++; 1346 1347 /* copy 8 descriptors to the firmware at a time */ 1348 if ((idx & 7) == 7) { 1349 myri10ge_submit_8rx(&rx->lanai[idx - 7], 1350 &rx->shadow[idx - 7]); 1351 } 1352 } 1353 } 1354 1355 static inline void 1356 myri10ge_unmap_rx_page(struct pci_dev *pdev, 1357 struct myri10ge_rx_buffer_state *info, int bytes) 1358 { 1359 /* unmap the recvd page if we're the only or last user of it */ 1360 if (bytes >= MYRI10GE_ALLOC_SIZE / 2 || 1361 (info->page_offset + 2 * bytes) > MYRI10GE_ALLOC_SIZE) { 1362 pci_unmap_page(pdev, (dma_unmap_addr(info, bus) 1363 & ~(MYRI10GE_ALLOC_SIZE - 1)), 1364 MYRI10GE_ALLOC_SIZE, PCI_DMA_FROMDEVICE); 1365 } 1366 } 1367 1368 /* 1369 * GRO does not support acceleration of tagged vlan frames, and 1370 * this NIC does not support vlan tag offload, so we must pop 1371 * the tag ourselves to be able to achieve GRO performance that 1372 * is comparable to LRO. 1373 */ 1374 1375 static inline void 1376 myri10ge_vlan_rx(struct net_device *dev, void *addr, struct sk_buff *skb) 1377 { 1378 u8 *va; 1379 struct vlan_ethhdr *veh; 1380 struct skb_frag_struct *frag; 1381 __wsum vsum; 1382 1383 va = addr; 1384 va += MXGEFW_PAD; 1385 veh = (struct vlan_ethhdr *)va; 1386 if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) == 1387 NETIF_F_HW_VLAN_CTAG_RX && 1388 veh->h_vlan_proto == htons(ETH_P_8021Q)) { 1389 /* fixup csum if needed */ 1390 if (skb->ip_summed == CHECKSUM_COMPLETE) { 1391 vsum = csum_partial(va + ETH_HLEN, VLAN_HLEN, 0); 1392 skb->csum = csum_sub(skb->csum, vsum); 1393 } 1394 /* pop tag */ 1395 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ntohs(veh->h_vlan_TCI)); 1396 memmove(va + VLAN_HLEN, va, 2 * ETH_ALEN); 1397 skb->len -= VLAN_HLEN; 1398 skb->data_len -= VLAN_HLEN; 1399 frag = skb_shinfo(skb)->frags; 1400 frag->page_offset += VLAN_HLEN; 1401 skb_frag_size_set(frag, skb_frag_size(frag) - VLAN_HLEN); 1402 } 1403 } 1404 1405 #define MYRI10GE_HLEN 64 /* Bytes to copy from page to skb linear memory */ 1406 1407 static inline int 1408 myri10ge_rx_done(struct myri10ge_slice_state *ss, int len, __wsum csum) 1409 { 1410 struct myri10ge_priv *mgp = ss->mgp; 1411 struct sk_buff *skb; 1412 struct skb_frag_struct *rx_frags; 1413 struct myri10ge_rx_buf *rx; 1414 int i, idx, remainder, bytes; 1415 struct pci_dev *pdev = mgp->pdev; 1416 struct net_device *dev = mgp->dev; 1417 u8 *va; 1418 bool polling; 1419 1420 if (len <= mgp->small_bytes) { 1421 rx = &ss->rx_small; 1422 bytes = mgp->small_bytes; 1423 } else { 1424 rx = &ss->rx_big; 1425 bytes = mgp->big_bytes; 1426 } 1427 1428 len += MXGEFW_PAD; 1429 idx = rx->cnt & rx->mask; 1430 va = page_address(rx->info[idx].page) + rx->info[idx].page_offset; 1431 prefetch(va); 1432 1433 /* When busy polling in user context, allocate skb and copy headers to 1434 * skb's linear memory ourselves. When not busy polling, use the napi 1435 * gro api. 1436 */ 1437 polling = myri10ge_ss_busy_polling(ss); 1438 if (polling) 1439 skb = netdev_alloc_skb(dev, MYRI10GE_HLEN + 16); 1440 else 1441 skb = napi_get_frags(&ss->napi); 1442 if (unlikely(skb == NULL)) { 1443 ss->stats.rx_dropped++; 1444 for (i = 0, remainder = len; remainder > 0; i++) { 1445 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes); 1446 put_page(rx->info[idx].page); 1447 rx->cnt++; 1448 idx = rx->cnt & rx->mask; 1449 remainder -= MYRI10GE_ALLOC_SIZE; 1450 } 1451 return 0; 1452 } 1453 rx_frags = skb_shinfo(skb)->frags; 1454 /* Fill skb_frag_struct(s) with data from our receive */ 1455 for (i = 0, remainder = len; remainder > 0; i++) { 1456 myri10ge_unmap_rx_page(pdev, &rx->info[idx], bytes); 1457 skb_fill_page_desc(skb, i, rx->info[idx].page, 1458 rx->info[idx].page_offset, 1459 remainder < MYRI10GE_ALLOC_SIZE ? 1460 remainder : MYRI10GE_ALLOC_SIZE); 1461 rx->cnt++; 1462 idx = rx->cnt & rx->mask; 1463 remainder -= MYRI10GE_ALLOC_SIZE; 1464 } 1465 1466 /* remove padding */ 1467 rx_frags[0].page_offset += MXGEFW_PAD; 1468 rx_frags[0].size -= MXGEFW_PAD; 1469 len -= MXGEFW_PAD; 1470 1471 skb->len = len; 1472 skb->data_len = len; 1473 skb->truesize += len; 1474 if (dev->features & NETIF_F_RXCSUM) { 1475 skb->ip_summed = CHECKSUM_COMPLETE; 1476 skb->csum = csum; 1477 } 1478 myri10ge_vlan_rx(mgp->dev, va, skb); 1479 skb_record_rx_queue(skb, ss - &mgp->ss[0]); 1480 skb_mark_napi_id(skb, &ss->napi); 1481 1482 if (polling) { 1483 int hlen; 1484 1485 /* myri10ge_vlan_rx might have moved the header, so compute 1486 * length and address again. 1487 */ 1488 hlen = MYRI10GE_HLEN > skb->len ? skb->len : MYRI10GE_HLEN; 1489 va = page_address(skb_frag_page(&rx_frags[0])) + 1490 rx_frags[0].page_offset; 1491 /* Copy header into the skb linear memory */ 1492 skb_copy_to_linear_data(skb, va, hlen); 1493 rx_frags[0].page_offset += hlen; 1494 rx_frags[0].size -= hlen; 1495 skb->data_len -= hlen; 1496 skb->tail += hlen; 1497 skb->protocol = eth_type_trans(skb, dev); 1498 netif_receive_skb(skb); 1499 } 1500 else 1501 napi_gro_frags(&ss->napi); 1502 1503 return 1; 1504 } 1505 1506 static inline void 1507 myri10ge_tx_done(struct myri10ge_slice_state *ss, int mcp_index) 1508 { 1509 struct pci_dev *pdev = ss->mgp->pdev; 1510 struct myri10ge_tx_buf *tx = &ss->tx; 1511 struct netdev_queue *dev_queue; 1512 struct sk_buff *skb; 1513 int idx, len; 1514 1515 while (tx->pkt_done != mcp_index) { 1516 idx = tx->done & tx->mask; 1517 skb = tx->info[idx].skb; 1518 1519 /* Mark as free */ 1520 tx->info[idx].skb = NULL; 1521 if (tx->info[idx].last) { 1522 tx->pkt_done++; 1523 tx->info[idx].last = 0; 1524 } 1525 tx->done++; 1526 len = dma_unmap_len(&tx->info[idx], len); 1527 dma_unmap_len_set(&tx->info[idx], len, 0); 1528 if (skb) { 1529 ss->stats.tx_bytes += skb->len; 1530 ss->stats.tx_packets++; 1531 dev_kfree_skb_irq(skb); 1532 if (len) 1533 pci_unmap_single(pdev, 1534 dma_unmap_addr(&tx->info[idx], 1535 bus), len, 1536 PCI_DMA_TODEVICE); 1537 } else { 1538 if (len) 1539 pci_unmap_page(pdev, 1540 dma_unmap_addr(&tx->info[idx], 1541 bus), len, 1542 PCI_DMA_TODEVICE); 1543 } 1544 } 1545 1546 dev_queue = netdev_get_tx_queue(ss->dev, ss - ss->mgp->ss); 1547 /* 1548 * Make a minimal effort to prevent the NIC from polling an 1549 * idle tx queue. If we can't get the lock we leave the queue 1550 * active. In this case, either a thread was about to start 1551 * using the queue anyway, or we lost a race and the NIC will 1552 * waste some of its resources polling an inactive queue for a 1553 * while. 1554 */ 1555 1556 if ((ss->mgp->dev->real_num_tx_queues > 1) && 1557 __netif_tx_trylock(dev_queue)) { 1558 if (tx->req == tx->done) { 1559 tx->queue_active = 0; 1560 put_be32(htonl(1), tx->send_stop); 1561 mb(); 1562 mmiowb(); 1563 } 1564 __netif_tx_unlock(dev_queue); 1565 } 1566 1567 /* start the queue if we've stopped it */ 1568 if (netif_tx_queue_stopped(dev_queue) && 1569 tx->req - tx->done < (tx->mask >> 1) && 1570 ss->mgp->running == MYRI10GE_ETH_RUNNING) { 1571 tx->wake_queue++; 1572 netif_tx_wake_queue(dev_queue); 1573 } 1574 } 1575 1576 static inline int 1577 myri10ge_clean_rx_done(struct myri10ge_slice_state *ss, int budget) 1578 { 1579 struct myri10ge_rx_done *rx_done = &ss->rx_done; 1580 struct myri10ge_priv *mgp = ss->mgp; 1581 unsigned long rx_bytes = 0; 1582 unsigned long rx_packets = 0; 1583 unsigned long rx_ok; 1584 int idx = rx_done->idx; 1585 int cnt = rx_done->cnt; 1586 int work_done = 0; 1587 u16 length; 1588 __wsum checksum; 1589 1590 while (rx_done->entry[idx].length != 0 && work_done < budget) { 1591 length = ntohs(rx_done->entry[idx].length); 1592 rx_done->entry[idx].length = 0; 1593 checksum = csum_unfold(rx_done->entry[idx].checksum); 1594 rx_ok = myri10ge_rx_done(ss, length, checksum); 1595 rx_packets += rx_ok; 1596 rx_bytes += rx_ok * (unsigned long)length; 1597 cnt++; 1598 idx = cnt & (mgp->max_intr_slots - 1); 1599 work_done++; 1600 } 1601 rx_done->idx = idx; 1602 rx_done->cnt = cnt; 1603 ss->stats.rx_packets += rx_packets; 1604 ss->stats.rx_bytes += rx_bytes; 1605 1606 /* restock receive rings if needed */ 1607 if (ss->rx_small.fill_cnt - ss->rx_small.cnt < myri10ge_fill_thresh) 1608 myri10ge_alloc_rx_pages(mgp, &ss->rx_small, 1609 mgp->small_bytes + MXGEFW_PAD, 0); 1610 if (ss->rx_big.fill_cnt - ss->rx_big.cnt < myri10ge_fill_thresh) 1611 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0); 1612 1613 return work_done; 1614 } 1615 1616 static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp) 1617 { 1618 struct mcp_irq_data *stats = mgp->ss[0].fw_stats; 1619 1620 if (unlikely(stats->stats_updated)) { 1621 unsigned link_up = ntohl(stats->link_up); 1622 if (mgp->link_state != link_up) { 1623 mgp->link_state = link_up; 1624 1625 if (mgp->link_state == MXGEFW_LINK_UP) { 1626 netif_info(mgp, link, mgp->dev, "link up\n"); 1627 netif_carrier_on(mgp->dev); 1628 mgp->link_changes++; 1629 } else { 1630 netif_info(mgp, link, mgp->dev, "link %s\n", 1631 (link_up == MXGEFW_LINK_MYRINET ? 1632 "mismatch (Myrinet detected)" : 1633 "down")); 1634 netif_carrier_off(mgp->dev); 1635 mgp->link_changes++; 1636 } 1637 } 1638 if (mgp->rdma_tags_available != 1639 ntohl(stats->rdma_tags_available)) { 1640 mgp->rdma_tags_available = 1641 ntohl(stats->rdma_tags_available); 1642 netdev_warn(mgp->dev, "RDMA timed out! %d tags left\n", 1643 mgp->rdma_tags_available); 1644 } 1645 mgp->down_cnt += stats->link_down; 1646 if (stats->link_down) 1647 wake_up(&mgp->down_wq); 1648 } 1649 } 1650 1651 static int myri10ge_poll(struct napi_struct *napi, int budget) 1652 { 1653 struct myri10ge_slice_state *ss = 1654 container_of(napi, struct myri10ge_slice_state, napi); 1655 int work_done; 1656 1657 #ifdef CONFIG_MYRI10GE_DCA 1658 if (ss->mgp->dca_enabled) 1659 myri10ge_update_dca(ss); 1660 #endif 1661 /* Try later if the busy_poll handler is running. */ 1662 if (!myri10ge_ss_lock_napi(ss)) 1663 return budget; 1664 1665 /* process as many rx events as NAPI will allow */ 1666 work_done = myri10ge_clean_rx_done(ss, budget); 1667 1668 myri10ge_ss_unlock_napi(ss); 1669 if (work_done < budget) { 1670 napi_complete(napi); 1671 put_be32(htonl(3), ss->irq_claim); 1672 } 1673 return work_done; 1674 } 1675 1676 #ifdef CONFIG_NET_RX_BUSY_POLL 1677 static int myri10ge_busy_poll(struct napi_struct *napi) 1678 { 1679 struct myri10ge_slice_state *ss = 1680 container_of(napi, struct myri10ge_slice_state, napi); 1681 struct myri10ge_priv *mgp = ss->mgp; 1682 int work_done; 1683 1684 /* Poll only when the link is up */ 1685 if (mgp->link_state != MXGEFW_LINK_UP) 1686 return LL_FLUSH_FAILED; 1687 1688 if (!myri10ge_ss_lock_poll(ss)) 1689 return LL_FLUSH_BUSY; 1690 1691 /* Process a small number of packets */ 1692 work_done = myri10ge_clean_rx_done(ss, 4); 1693 if (work_done) 1694 ss->busy_poll_cnt += work_done; 1695 else 1696 ss->busy_poll_miss++; 1697 1698 myri10ge_ss_unlock_poll(ss); 1699 1700 return work_done; 1701 } 1702 #endif /* CONFIG_NET_RX_BUSY_POLL */ 1703 1704 static irqreturn_t myri10ge_intr(int irq, void *arg) 1705 { 1706 struct myri10ge_slice_state *ss = arg; 1707 struct myri10ge_priv *mgp = ss->mgp; 1708 struct mcp_irq_data *stats = ss->fw_stats; 1709 struct myri10ge_tx_buf *tx = &ss->tx; 1710 u32 send_done_count; 1711 int i; 1712 1713 /* an interrupt on a non-zero receive-only slice is implicitly 1714 * valid since MSI-X irqs are not shared */ 1715 if ((mgp->dev->real_num_tx_queues == 1) && (ss != mgp->ss)) { 1716 napi_schedule(&ss->napi); 1717 return IRQ_HANDLED; 1718 } 1719 1720 /* make sure it is our IRQ, and that the DMA has finished */ 1721 if (unlikely(!stats->valid)) 1722 return IRQ_NONE; 1723 1724 /* low bit indicates receives are present, so schedule 1725 * napi poll handler */ 1726 if (stats->valid & 1) 1727 napi_schedule(&ss->napi); 1728 1729 if (!mgp->msi_enabled && !mgp->msix_enabled) { 1730 put_be32(0, mgp->irq_deassert); 1731 if (!myri10ge_deassert_wait) 1732 stats->valid = 0; 1733 mb(); 1734 } else 1735 stats->valid = 0; 1736 1737 /* Wait for IRQ line to go low, if using INTx */ 1738 i = 0; 1739 while (1) { 1740 i++; 1741 /* check for transmit completes and receives */ 1742 send_done_count = ntohl(stats->send_done_count); 1743 if (send_done_count != tx->pkt_done) 1744 myri10ge_tx_done(ss, (int)send_done_count); 1745 if (unlikely(i > myri10ge_max_irq_loops)) { 1746 netdev_warn(mgp->dev, "irq stuck?\n"); 1747 stats->valid = 0; 1748 schedule_work(&mgp->watchdog_work); 1749 } 1750 if (likely(stats->valid == 0)) 1751 break; 1752 cpu_relax(); 1753 barrier(); 1754 } 1755 1756 /* Only slice 0 updates stats */ 1757 if (ss == mgp->ss) 1758 myri10ge_check_statblock(mgp); 1759 1760 put_be32(htonl(3), ss->irq_claim + 1); 1761 return IRQ_HANDLED; 1762 } 1763 1764 static int 1765 myri10ge_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd) 1766 { 1767 struct myri10ge_priv *mgp = netdev_priv(netdev); 1768 char *ptr; 1769 int i; 1770 1771 cmd->autoneg = AUTONEG_DISABLE; 1772 ethtool_cmd_speed_set(cmd, SPEED_10000); 1773 cmd->duplex = DUPLEX_FULL; 1774 1775 /* 1776 * parse the product code to deterimine the interface type 1777 * (CX4, XFP, Quad Ribbon Fiber) by looking at the character 1778 * after the 3rd dash in the driver's cached copy of the 1779 * EEPROM's product code string. 1780 */ 1781 ptr = mgp->product_code_string; 1782 if (ptr == NULL) { 1783 netdev_err(netdev, "Missing product code\n"); 1784 return 0; 1785 } 1786 for (i = 0; i < 3; i++, ptr++) { 1787 ptr = strchr(ptr, '-'); 1788 if (ptr == NULL) { 1789 netdev_err(netdev, "Invalid product code %s\n", 1790 mgp->product_code_string); 1791 return 0; 1792 } 1793 } 1794 if (*ptr == '2') 1795 ptr++; 1796 if (*ptr == 'R' || *ptr == 'Q' || *ptr == 'S') { 1797 /* We've found either an XFP, quad ribbon fiber, or SFP+ */ 1798 cmd->port = PORT_FIBRE; 1799 cmd->supported |= SUPPORTED_FIBRE; 1800 cmd->advertising |= ADVERTISED_FIBRE; 1801 } else { 1802 cmd->port = PORT_OTHER; 1803 } 1804 if (*ptr == 'R' || *ptr == 'S') 1805 cmd->transceiver = XCVR_EXTERNAL; 1806 else 1807 cmd->transceiver = XCVR_INTERNAL; 1808 1809 return 0; 1810 } 1811 1812 static void 1813 myri10ge_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info) 1814 { 1815 struct myri10ge_priv *mgp = netdev_priv(netdev); 1816 1817 strlcpy(info->driver, "myri10ge", sizeof(info->driver)); 1818 strlcpy(info->version, MYRI10GE_VERSION_STR, sizeof(info->version)); 1819 strlcpy(info->fw_version, mgp->fw_version, sizeof(info->fw_version)); 1820 strlcpy(info->bus_info, pci_name(mgp->pdev), sizeof(info->bus_info)); 1821 } 1822 1823 static int 1824 myri10ge_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal) 1825 { 1826 struct myri10ge_priv *mgp = netdev_priv(netdev); 1827 1828 coal->rx_coalesce_usecs = mgp->intr_coal_delay; 1829 return 0; 1830 } 1831 1832 static int 1833 myri10ge_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *coal) 1834 { 1835 struct myri10ge_priv *mgp = netdev_priv(netdev); 1836 1837 mgp->intr_coal_delay = coal->rx_coalesce_usecs; 1838 put_be32(htonl(mgp->intr_coal_delay), mgp->intr_coal_delay_ptr); 1839 return 0; 1840 } 1841 1842 static void 1843 myri10ge_get_pauseparam(struct net_device *netdev, 1844 struct ethtool_pauseparam *pause) 1845 { 1846 struct myri10ge_priv *mgp = netdev_priv(netdev); 1847 1848 pause->autoneg = 0; 1849 pause->rx_pause = mgp->pause; 1850 pause->tx_pause = mgp->pause; 1851 } 1852 1853 static int 1854 myri10ge_set_pauseparam(struct net_device *netdev, 1855 struct ethtool_pauseparam *pause) 1856 { 1857 struct myri10ge_priv *mgp = netdev_priv(netdev); 1858 1859 if (pause->tx_pause != mgp->pause) 1860 return myri10ge_change_pause(mgp, pause->tx_pause); 1861 if (pause->rx_pause != mgp->pause) 1862 return myri10ge_change_pause(mgp, pause->rx_pause); 1863 if (pause->autoneg != 0) 1864 return -EINVAL; 1865 return 0; 1866 } 1867 1868 static void 1869 myri10ge_get_ringparam(struct net_device *netdev, 1870 struct ethtool_ringparam *ring) 1871 { 1872 struct myri10ge_priv *mgp = netdev_priv(netdev); 1873 1874 ring->rx_mini_max_pending = mgp->ss[0].rx_small.mask + 1; 1875 ring->rx_max_pending = mgp->ss[0].rx_big.mask + 1; 1876 ring->rx_jumbo_max_pending = 0; 1877 ring->tx_max_pending = mgp->ss[0].tx.mask + 1; 1878 ring->rx_mini_pending = ring->rx_mini_max_pending; 1879 ring->rx_pending = ring->rx_max_pending; 1880 ring->rx_jumbo_pending = ring->rx_jumbo_max_pending; 1881 ring->tx_pending = ring->tx_max_pending; 1882 } 1883 1884 static const char myri10ge_gstrings_main_stats[][ETH_GSTRING_LEN] = { 1885 "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors", 1886 "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions", 1887 "rx_length_errors", "rx_over_errors", "rx_crc_errors", 1888 "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors", 1889 "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors", 1890 "tx_heartbeat_errors", "tx_window_errors", 1891 /* device-specific stats */ 1892 "tx_boundary", "WC", "irq", "MSI", "MSIX", 1893 "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs", 1894 "serial_number", "watchdog_resets", 1895 #ifdef CONFIG_MYRI10GE_DCA 1896 "dca_capable_firmware", "dca_device_present", 1897 #endif 1898 "link_changes", "link_up", "dropped_link_overflow", 1899 "dropped_link_error_or_filtered", 1900 "dropped_pause", "dropped_bad_phy", "dropped_bad_crc32", 1901 "dropped_unicast_filtered", "dropped_multicast_filtered", 1902 "dropped_runt", "dropped_overrun", "dropped_no_small_buffer", 1903 "dropped_no_big_buffer" 1904 }; 1905 1906 static const char myri10ge_gstrings_slice_stats[][ETH_GSTRING_LEN] = { 1907 "----------- slice ---------", 1908 "tx_pkt_start", "tx_pkt_done", "tx_req", "tx_done", 1909 "rx_small_cnt", "rx_big_cnt", 1910 "wake_queue", "stop_queue", "tx_linearized", 1911 #ifdef CONFIG_NET_RX_BUSY_POLL 1912 "rx_lock_napi_yield", "rx_lock_poll_yield", "rx_busy_poll_miss", 1913 "rx_busy_poll_cnt", 1914 #endif 1915 }; 1916 1917 #define MYRI10GE_NET_STATS_LEN 21 1918 #define MYRI10GE_MAIN_STATS_LEN ARRAY_SIZE(myri10ge_gstrings_main_stats) 1919 #define MYRI10GE_SLICE_STATS_LEN ARRAY_SIZE(myri10ge_gstrings_slice_stats) 1920 1921 static void 1922 myri10ge_get_strings(struct net_device *netdev, u32 stringset, u8 * data) 1923 { 1924 struct myri10ge_priv *mgp = netdev_priv(netdev); 1925 int i; 1926 1927 switch (stringset) { 1928 case ETH_SS_STATS: 1929 memcpy(data, *myri10ge_gstrings_main_stats, 1930 sizeof(myri10ge_gstrings_main_stats)); 1931 data += sizeof(myri10ge_gstrings_main_stats); 1932 for (i = 0; i < mgp->num_slices; i++) { 1933 memcpy(data, *myri10ge_gstrings_slice_stats, 1934 sizeof(myri10ge_gstrings_slice_stats)); 1935 data += sizeof(myri10ge_gstrings_slice_stats); 1936 } 1937 break; 1938 } 1939 } 1940 1941 static int myri10ge_get_sset_count(struct net_device *netdev, int sset) 1942 { 1943 struct myri10ge_priv *mgp = netdev_priv(netdev); 1944 1945 switch (sset) { 1946 case ETH_SS_STATS: 1947 return MYRI10GE_MAIN_STATS_LEN + 1948 mgp->num_slices * MYRI10GE_SLICE_STATS_LEN; 1949 default: 1950 return -EOPNOTSUPP; 1951 } 1952 } 1953 1954 static void 1955 myri10ge_get_ethtool_stats(struct net_device *netdev, 1956 struct ethtool_stats *stats, u64 * data) 1957 { 1958 struct myri10ge_priv *mgp = netdev_priv(netdev); 1959 struct myri10ge_slice_state *ss; 1960 struct rtnl_link_stats64 link_stats; 1961 int slice; 1962 int i; 1963 1964 /* force stats update */ 1965 memset(&link_stats, 0, sizeof(link_stats)); 1966 (void)myri10ge_get_stats(netdev, &link_stats); 1967 for (i = 0; i < MYRI10GE_NET_STATS_LEN; i++) 1968 data[i] = ((u64 *)&link_stats)[i]; 1969 1970 data[i++] = (unsigned int)mgp->tx_boundary; 1971 data[i++] = (unsigned int)mgp->wc_enabled; 1972 data[i++] = (unsigned int)mgp->pdev->irq; 1973 data[i++] = (unsigned int)mgp->msi_enabled; 1974 data[i++] = (unsigned int)mgp->msix_enabled; 1975 data[i++] = (unsigned int)mgp->read_dma; 1976 data[i++] = (unsigned int)mgp->write_dma; 1977 data[i++] = (unsigned int)mgp->read_write_dma; 1978 data[i++] = (unsigned int)mgp->serial_number; 1979 data[i++] = (unsigned int)mgp->watchdog_resets; 1980 #ifdef CONFIG_MYRI10GE_DCA 1981 data[i++] = (unsigned int)(mgp->ss[0].dca_tag != NULL); 1982 data[i++] = (unsigned int)(mgp->dca_enabled); 1983 #endif 1984 data[i++] = (unsigned int)mgp->link_changes; 1985 1986 /* firmware stats are useful only in the first slice */ 1987 ss = &mgp->ss[0]; 1988 data[i++] = (unsigned int)ntohl(ss->fw_stats->link_up); 1989 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_link_overflow); 1990 data[i++] = 1991 (unsigned int)ntohl(ss->fw_stats->dropped_link_error_or_filtered); 1992 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_pause); 1993 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_phy); 1994 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_bad_crc32); 1995 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_unicast_filtered); 1996 data[i++] = 1997 (unsigned int)ntohl(ss->fw_stats->dropped_multicast_filtered); 1998 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_runt); 1999 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_overrun); 2000 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_small_buffer); 2001 data[i++] = (unsigned int)ntohl(ss->fw_stats->dropped_no_big_buffer); 2002 2003 for (slice = 0; slice < mgp->num_slices; slice++) { 2004 ss = &mgp->ss[slice]; 2005 data[i++] = slice; 2006 data[i++] = (unsigned int)ss->tx.pkt_start; 2007 data[i++] = (unsigned int)ss->tx.pkt_done; 2008 data[i++] = (unsigned int)ss->tx.req; 2009 data[i++] = (unsigned int)ss->tx.done; 2010 data[i++] = (unsigned int)ss->rx_small.cnt; 2011 data[i++] = (unsigned int)ss->rx_big.cnt; 2012 data[i++] = (unsigned int)ss->tx.wake_queue; 2013 data[i++] = (unsigned int)ss->tx.stop_queue; 2014 data[i++] = (unsigned int)ss->tx.linearized; 2015 #ifdef CONFIG_NET_RX_BUSY_POLL 2016 data[i++] = ss->lock_napi_yield; 2017 data[i++] = ss->lock_poll_yield; 2018 data[i++] = ss->busy_poll_miss; 2019 data[i++] = ss->busy_poll_cnt; 2020 #endif 2021 } 2022 } 2023 2024 static void myri10ge_set_msglevel(struct net_device *netdev, u32 value) 2025 { 2026 struct myri10ge_priv *mgp = netdev_priv(netdev); 2027 mgp->msg_enable = value; 2028 } 2029 2030 static u32 myri10ge_get_msglevel(struct net_device *netdev) 2031 { 2032 struct myri10ge_priv *mgp = netdev_priv(netdev); 2033 return mgp->msg_enable; 2034 } 2035 2036 /* 2037 * Use a low-level command to change the LED behavior. Rather than 2038 * blinking (which is the normal case), when identify is used, the 2039 * yellow LED turns solid. 2040 */ 2041 static int myri10ge_led(struct myri10ge_priv *mgp, int on) 2042 { 2043 struct mcp_gen_header *hdr; 2044 struct device *dev = &mgp->pdev->dev; 2045 size_t hdr_off, pattern_off, hdr_len; 2046 u32 pattern = 0xfffffffe; 2047 2048 /* find running firmware header */ 2049 hdr_off = swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET)); 2050 if ((hdr_off & 3) || hdr_off + sizeof(*hdr) > mgp->sram_size) { 2051 dev_err(dev, "Running firmware has bad header offset (%d)\n", 2052 (int)hdr_off); 2053 return -EIO; 2054 } 2055 hdr_len = swab32(readl(mgp->sram + hdr_off + 2056 offsetof(struct mcp_gen_header, header_length))); 2057 pattern_off = hdr_off + offsetof(struct mcp_gen_header, led_pattern); 2058 if (pattern_off >= (hdr_len + hdr_off)) { 2059 dev_info(dev, "Firmware does not support LED identification\n"); 2060 return -EINVAL; 2061 } 2062 if (!on) 2063 pattern = swab32(readl(mgp->sram + pattern_off + 4)); 2064 writel(swab32(pattern), mgp->sram + pattern_off); 2065 return 0; 2066 } 2067 2068 static int 2069 myri10ge_phys_id(struct net_device *netdev, enum ethtool_phys_id_state state) 2070 { 2071 struct myri10ge_priv *mgp = netdev_priv(netdev); 2072 int rc; 2073 2074 switch (state) { 2075 case ETHTOOL_ID_ACTIVE: 2076 rc = myri10ge_led(mgp, 1); 2077 break; 2078 2079 case ETHTOOL_ID_INACTIVE: 2080 rc = myri10ge_led(mgp, 0); 2081 break; 2082 2083 default: 2084 rc = -EINVAL; 2085 } 2086 2087 return rc; 2088 } 2089 2090 static const struct ethtool_ops myri10ge_ethtool_ops = { 2091 .get_settings = myri10ge_get_settings, 2092 .get_drvinfo = myri10ge_get_drvinfo, 2093 .get_coalesce = myri10ge_get_coalesce, 2094 .set_coalesce = myri10ge_set_coalesce, 2095 .get_pauseparam = myri10ge_get_pauseparam, 2096 .set_pauseparam = myri10ge_set_pauseparam, 2097 .get_ringparam = myri10ge_get_ringparam, 2098 .get_link = ethtool_op_get_link, 2099 .get_strings = myri10ge_get_strings, 2100 .get_sset_count = myri10ge_get_sset_count, 2101 .get_ethtool_stats = myri10ge_get_ethtool_stats, 2102 .set_msglevel = myri10ge_set_msglevel, 2103 .get_msglevel = myri10ge_get_msglevel, 2104 .set_phys_id = myri10ge_phys_id, 2105 }; 2106 2107 static int myri10ge_allocate_rings(struct myri10ge_slice_state *ss) 2108 { 2109 struct myri10ge_priv *mgp = ss->mgp; 2110 struct myri10ge_cmd cmd; 2111 struct net_device *dev = mgp->dev; 2112 int tx_ring_size, rx_ring_size; 2113 int tx_ring_entries, rx_ring_entries; 2114 int i, slice, status; 2115 size_t bytes; 2116 2117 /* get ring sizes */ 2118 slice = ss - mgp->ss; 2119 cmd.data0 = slice; 2120 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_RING_SIZE, &cmd, 0); 2121 tx_ring_size = cmd.data0; 2122 cmd.data0 = slice; 2123 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_RX_RING_SIZE, &cmd, 0); 2124 if (status != 0) 2125 return status; 2126 rx_ring_size = cmd.data0; 2127 2128 tx_ring_entries = tx_ring_size / sizeof(struct mcp_kreq_ether_send); 2129 rx_ring_entries = rx_ring_size / sizeof(struct mcp_dma_addr); 2130 ss->tx.mask = tx_ring_entries - 1; 2131 ss->rx_small.mask = ss->rx_big.mask = rx_ring_entries - 1; 2132 2133 status = -ENOMEM; 2134 2135 /* allocate the host shadow rings */ 2136 2137 bytes = 8 + (MYRI10GE_MAX_SEND_DESC_TSO + 4) 2138 * sizeof(*ss->tx.req_list); 2139 ss->tx.req_bytes = kzalloc(bytes, GFP_KERNEL); 2140 if (ss->tx.req_bytes == NULL) 2141 goto abort_with_nothing; 2142 2143 /* ensure req_list entries are aligned to 8 bytes */ 2144 ss->tx.req_list = (struct mcp_kreq_ether_send *) 2145 ALIGN((unsigned long)ss->tx.req_bytes, 8); 2146 ss->tx.queue_active = 0; 2147 2148 bytes = rx_ring_entries * sizeof(*ss->rx_small.shadow); 2149 ss->rx_small.shadow = kzalloc(bytes, GFP_KERNEL); 2150 if (ss->rx_small.shadow == NULL) 2151 goto abort_with_tx_req_bytes; 2152 2153 bytes = rx_ring_entries * sizeof(*ss->rx_big.shadow); 2154 ss->rx_big.shadow = kzalloc(bytes, GFP_KERNEL); 2155 if (ss->rx_big.shadow == NULL) 2156 goto abort_with_rx_small_shadow; 2157 2158 /* allocate the host info rings */ 2159 2160 bytes = tx_ring_entries * sizeof(*ss->tx.info); 2161 ss->tx.info = kzalloc(bytes, GFP_KERNEL); 2162 if (ss->tx.info == NULL) 2163 goto abort_with_rx_big_shadow; 2164 2165 bytes = rx_ring_entries * sizeof(*ss->rx_small.info); 2166 ss->rx_small.info = kzalloc(bytes, GFP_KERNEL); 2167 if (ss->rx_small.info == NULL) 2168 goto abort_with_tx_info; 2169 2170 bytes = rx_ring_entries * sizeof(*ss->rx_big.info); 2171 ss->rx_big.info = kzalloc(bytes, GFP_KERNEL); 2172 if (ss->rx_big.info == NULL) 2173 goto abort_with_rx_small_info; 2174 2175 /* Fill the receive rings */ 2176 ss->rx_big.cnt = 0; 2177 ss->rx_small.cnt = 0; 2178 ss->rx_big.fill_cnt = 0; 2179 ss->rx_small.fill_cnt = 0; 2180 ss->rx_small.page_offset = MYRI10GE_ALLOC_SIZE; 2181 ss->rx_big.page_offset = MYRI10GE_ALLOC_SIZE; 2182 ss->rx_small.watchdog_needed = 0; 2183 ss->rx_big.watchdog_needed = 0; 2184 if (mgp->small_bytes == 0) { 2185 ss->rx_small.fill_cnt = ss->rx_small.mask + 1; 2186 } else { 2187 myri10ge_alloc_rx_pages(mgp, &ss->rx_small, 2188 mgp->small_bytes + MXGEFW_PAD, 0); 2189 } 2190 2191 if (ss->rx_small.fill_cnt < ss->rx_small.mask + 1) { 2192 netdev_err(dev, "slice-%d: alloced only %d small bufs\n", 2193 slice, ss->rx_small.fill_cnt); 2194 goto abort_with_rx_small_ring; 2195 } 2196 2197 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, mgp->big_bytes, 0); 2198 if (ss->rx_big.fill_cnt < ss->rx_big.mask + 1) { 2199 netdev_err(dev, "slice-%d: alloced only %d big bufs\n", 2200 slice, ss->rx_big.fill_cnt); 2201 goto abort_with_rx_big_ring; 2202 } 2203 2204 return 0; 2205 2206 abort_with_rx_big_ring: 2207 for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) { 2208 int idx = i & ss->rx_big.mask; 2209 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx], 2210 mgp->big_bytes); 2211 put_page(ss->rx_big.info[idx].page); 2212 } 2213 2214 abort_with_rx_small_ring: 2215 if (mgp->small_bytes == 0) 2216 ss->rx_small.fill_cnt = ss->rx_small.cnt; 2217 for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) { 2218 int idx = i & ss->rx_small.mask; 2219 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx], 2220 mgp->small_bytes + MXGEFW_PAD); 2221 put_page(ss->rx_small.info[idx].page); 2222 } 2223 2224 kfree(ss->rx_big.info); 2225 2226 abort_with_rx_small_info: 2227 kfree(ss->rx_small.info); 2228 2229 abort_with_tx_info: 2230 kfree(ss->tx.info); 2231 2232 abort_with_rx_big_shadow: 2233 kfree(ss->rx_big.shadow); 2234 2235 abort_with_rx_small_shadow: 2236 kfree(ss->rx_small.shadow); 2237 2238 abort_with_tx_req_bytes: 2239 kfree(ss->tx.req_bytes); 2240 ss->tx.req_bytes = NULL; 2241 ss->tx.req_list = NULL; 2242 2243 abort_with_nothing: 2244 return status; 2245 } 2246 2247 static void myri10ge_free_rings(struct myri10ge_slice_state *ss) 2248 { 2249 struct myri10ge_priv *mgp = ss->mgp; 2250 struct sk_buff *skb; 2251 struct myri10ge_tx_buf *tx; 2252 int i, len, idx; 2253 2254 /* If not allocated, skip it */ 2255 if (ss->tx.req_list == NULL) 2256 return; 2257 2258 for (i = ss->rx_big.cnt; i < ss->rx_big.fill_cnt; i++) { 2259 idx = i & ss->rx_big.mask; 2260 if (i == ss->rx_big.fill_cnt - 1) 2261 ss->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE; 2262 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_big.info[idx], 2263 mgp->big_bytes); 2264 put_page(ss->rx_big.info[idx].page); 2265 } 2266 2267 if (mgp->small_bytes == 0) 2268 ss->rx_small.fill_cnt = ss->rx_small.cnt; 2269 for (i = ss->rx_small.cnt; i < ss->rx_small.fill_cnt; i++) { 2270 idx = i & ss->rx_small.mask; 2271 if (i == ss->rx_small.fill_cnt - 1) 2272 ss->rx_small.info[idx].page_offset = 2273 MYRI10GE_ALLOC_SIZE; 2274 myri10ge_unmap_rx_page(mgp->pdev, &ss->rx_small.info[idx], 2275 mgp->small_bytes + MXGEFW_PAD); 2276 put_page(ss->rx_small.info[idx].page); 2277 } 2278 tx = &ss->tx; 2279 while (tx->done != tx->req) { 2280 idx = tx->done & tx->mask; 2281 skb = tx->info[idx].skb; 2282 2283 /* Mark as free */ 2284 tx->info[idx].skb = NULL; 2285 tx->done++; 2286 len = dma_unmap_len(&tx->info[idx], len); 2287 dma_unmap_len_set(&tx->info[idx], len, 0); 2288 if (skb) { 2289 ss->stats.tx_dropped++; 2290 dev_kfree_skb_any(skb); 2291 if (len) 2292 pci_unmap_single(mgp->pdev, 2293 dma_unmap_addr(&tx->info[idx], 2294 bus), len, 2295 PCI_DMA_TODEVICE); 2296 } else { 2297 if (len) 2298 pci_unmap_page(mgp->pdev, 2299 dma_unmap_addr(&tx->info[idx], 2300 bus), len, 2301 PCI_DMA_TODEVICE); 2302 } 2303 } 2304 kfree(ss->rx_big.info); 2305 2306 kfree(ss->rx_small.info); 2307 2308 kfree(ss->tx.info); 2309 2310 kfree(ss->rx_big.shadow); 2311 2312 kfree(ss->rx_small.shadow); 2313 2314 kfree(ss->tx.req_bytes); 2315 ss->tx.req_bytes = NULL; 2316 ss->tx.req_list = NULL; 2317 } 2318 2319 static int myri10ge_request_irq(struct myri10ge_priv *mgp) 2320 { 2321 struct pci_dev *pdev = mgp->pdev; 2322 struct myri10ge_slice_state *ss; 2323 struct net_device *netdev = mgp->dev; 2324 int i; 2325 int status; 2326 2327 mgp->msi_enabled = 0; 2328 mgp->msix_enabled = 0; 2329 status = 0; 2330 if (myri10ge_msi) { 2331 if (mgp->num_slices > 1) { 2332 status = 2333 pci_enable_msix(pdev, mgp->msix_vectors, 2334 mgp->num_slices); 2335 if (status == 0) { 2336 mgp->msix_enabled = 1; 2337 } else { 2338 dev_err(&pdev->dev, 2339 "Error %d setting up MSI-X\n", status); 2340 return status; 2341 } 2342 } 2343 if (mgp->msix_enabled == 0) { 2344 status = pci_enable_msi(pdev); 2345 if (status != 0) { 2346 dev_err(&pdev->dev, 2347 "Error %d setting up MSI; falling back to xPIC\n", 2348 status); 2349 } else { 2350 mgp->msi_enabled = 1; 2351 } 2352 } 2353 } 2354 if (mgp->msix_enabled) { 2355 for (i = 0; i < mgp->num_slices; i++) { 2356 ss = &mgp->ss[i]; 2357 snprintf(ss->irq_desc, sizeof(ss->irq_desc), 2358 "%s:slice-%d", netdev->name, i); 2359 status = request_irq(mgp->msix_vectors[i].vector, 2360 myri10ge_intr, 0, ss->irq_desc, 2361 ss); 2362 if (status != 0) { 2363 dev_err(&pdev->dev, 2364 "slice %d failed to allocate IRQ\n", i); 2365 i--; 2366 while (i >= 0) { 2367 free_irq(mgp->msix_vectors[i].vector, 2368 &mgp->ss[i]); 2369 i--; 2370 } 2371 pci_disable_msix(pdev); 2372 return status; 2373 } 2374 } 2375 } else { 2376 status = request_irq(pdev->irq, myri10ge_intr, IRQF_SHARED, 2377 mgp->dev->name, &mgp->ss[0]); 2378 if (status != 0) { 2379 dev_err(&pdev->dev, "failed to allocate IRQ\n"); 2380 if (mgp->msi_enabled) 2381 pci_disable_msi(pdev); 2382 } 2383 } 2384 return status; 2385 } 2386 2387 static void myri10ge_free_irq(struct myri10ge_priv *mgp) 2388 { 2389 struct pci_dev *pdev = mgp->pdev; 2390 int i; 2391 2392 if (mgp->msix_enabled) { 2393 for (i = 0; i < mgp->num_slices; i++) 2394 free_irq(mgp->msix_vectors[i].vector, &mgp->ss[i]); 2395 } else { 2396 free_irq(pdev->irq, &mgp->ss[0]); 2397 } 2398 if (mgp->msi_enabled) 2399 pci_disable_msi(pdev); 2400 if (mgp->msix_enabled) 2401 pci_disable_msix(pdev); 2402 } 2403 2404 static int myri10ge_get_txrx(struct myri10ge_priv *mgp, int slice) 2405 { 2406 struct myri10ge_cmd cmd; 2407 struct myri10ge_slice_state *ss; 2408 int status; 2409 2410 ss = &mgp->ss[slice]; 2411 status = 0; 2412 if (slice == 0 || (mgp->dev->real_num_tx_queues > 1)) { 2413 cmd.data0 = slice; 2414 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET, 2415 &cmd, 0); 2416 ss->tx.lanai = (struct mcp_kreq_ether_send __iomem *) 2417 (mgp->sram + cmd.data0); 2418 } 2419 cmd.data0 = slice; 2420 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SMALL_RX_OFFSET, 2421 &cmd, 0); 2422 ss->rx_small.lanai = (struct mcp_kreq_ether_recv __iomem *) 2423 (mgp->sram + cmd.data0); 2424 2425 cmd.data0 = slice; 2426 status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_BIG_RX_OFFSET, &cmd, 0); 2427 ss->rx_big.lanai = (struct mcp_kreq_ether_recv __iomem *) 2428 (mgp->sram + cmd.data0); 2429 2430 ss->tx.send_go = (__iomem __be32 *) 2431 (mgp->sram + MXGEFW_ETH_SEND_GO + 64 * slice); 2432 ss->tx.send_stop = (__iomem __be32 *) 2433 (mgp->sram + MXGEFW_ETH_SEND_STOP + 64 * slice); 2434 return status; 2435 2436 } 2437 2438 static int myri10ge_set_stats(struct myri10ge_priv *mgp, int slice) 2439 { 2440 struct myri10ge_cmd cmd; 2441 struct myri10ge_slice_state *ss; 2442 int status; 2443 2444 ss = &mgp->ss[slice]; 2445 cmd.data0 = MYRI10GE_LOWPART_TO_U32(ss->fw_stats_bus); 2446 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(ss->fw_stats_bus); 2447 cmd.data2 = sizeof(struct mcp_irq_data) | (slice << 16); 2448 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_STATS_DMA_V2, &cmd, 0); 2449 if (status == -ENOSYS) { 2450 dma_addr_t bus = ss->fw_stats_bus; 2451 if (slice != 0) 2452 return -EINVAL; 2453 bus += offsetof(struct mcp_irq_data, send_done_count); 2454 cmd.data0 = MYRI10GE_LOWPART_TO_U32(bus); 2455 cmd.data1 = MYRI10GE_HIGHPART_TO_U32(bus); 2456 status = myri10ge_send_cmd(mgp, 2457 MXGEFW_CMD_SET_STATS_DMA_OBSOLETE, 2458 &cmd, 0); 2459 /* Firmware cannot support multicast without STATS_DMA_V2 */ 2460 mgp->fw_multicast_support = 0; 2461 } else { 2462 mgp->fw_multicast_support = 1; 2463 } 2464 return 0; 2465 } 2466 2467 static int myri10ge_open(struct net_device *dev) 2468 { 2469 struct myri10ge_slice_state *ss; 2470 struct myri10ge_priv *mgp = netdev_priv(dev); 2471 struct myri10ge_cmd cmd; 2472 int i, status, big_pow2, slice; 2473 u8 __iomem *itable; 2474 2475 if (mgp->running != MYRI10GE_ETH_STOPPED) 2476 return -EBUSY; 2477 2478 mgp->running = MYRI10GE_ETH_STARTING; 2479 status = myri10ge_reset(mgp); 2480 if (status != 0) { 2481 netdev_err(dev, "failed reset\n"); 2482 goto abort_with_nothing; 2483 } 2484 2485 if (mgp->num_slices > 1) { 2486 cmd.data0 = mgp->num_slices; 2487 cmd.data1 = MXGEFW_SLICE_INTR_MODE_ONE_PER_SLICE; 2488 if (mgp->dev->real_num_tx_queues > 1) 2489 cmd.data1 |= MXGEFW_SLICE_ENABLE_MULTIPLE_TX_QUEUES; 2490 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ENABLE_RSS_QUEUES, 2491 &cmd, 0); 2492 if (status != 0) { 2493 netdev_err(dev, "failed to set number of slices\n"); 2494 goto abort_with_nothing; 2495 } 2496 /* setup the indirection table */ 2497 cmd.data0 = mgp->num_slices; 2498 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_TABLE_SIZE, 2499 &cmd, 0); 2500 2501 status |= myri10ge_send_cmd(mgp, 2502 MXGEFW_CMD_GET_RSS_TABLE_OFFSET, 2503 &cmd, 0); 2504 if (status != 0) { 2505 netdev_err(dev, "failed to setup rss tables\n"); 2506 goto abort_with_nothing; 2507 } 2508 2509 /* just enable an identity mapping */ 2510 itable = mgp->sram + cmd.data0; 2511 for (i = 0; i < mgp->num_slices; i++) 2512 __raw_writeb(i, &itable[i]); 2513 2514 cmd.data0 = 1; 2515 cmd.data1 = myri10ge_rss_hash; 2516 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_RSS_ENABLE, 2517 &cmd, 0); 2518 if (status != 0) { 2519 netdev_err(dev, "failed to enable slices\n"); 2520 goto abort_with_nothing; 2521 } 2522 } 2523 2524 status = myri10ge_request_irq(mgp); 2525 if (status != 0) 2526 goto abort_with_nothing; 2527 2528 /* decide what small buffer size to use. For good TCP rx 2529 * performance, it is important to not receive 1514 byte 2530 * frames into jumbo buffers, as it confuses the socket buffer 2531 * accounting code, leading to drops and erratic performance. 2532 */ 2533 2534 if (dev->mtu <= ETH_DATA_LEN) 2535 /* enough for a TCP header */ 2536 mgp->small_bytes = (128 > SMP_CACHE_BYTES) 2537 ? (128 - MXGEFW_PAD) 2538 : (SMP_CACHE_BYTES - MXGEFW_PAD); 2539 else 2540 /* enough for a vlan encapsulated ETH_DATA_LEN frame */ 2541 mgp->small_bytes = VLAN_ETH_FRAME_LEN; 2542 2543 /* Override the small buffer size? */ 2544 if (myri10ge_small_bytes >= 0) 2545 mgp->small_bytes = myri10ge_small_bytes; 2546 2547 /* Firmware needs the big buff size as a power of 2. Lie and 2548 * tell him the buffer is larger, because we only use 1 2549 * buffer/pkt, and the mtu will prevent overruns. 2550 */ 2551 big_pow2 = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD; 2552 if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) { 2553 while (!is_power_of_2(big_pow2)) 2554 big_pow2++; 2555 mgp->big_bytes = dev->mtu + ETH_HLEN + VLAN_HLEN + MXGEFW_PAD; 2556 } else { 2557 big_pow2 = MYRI10GE_ALLOC_SIZE; 2558 mgp->big_bytes = big_pow2; 2559 } 2560 2561 /* setup the per-slice data structures */ 2562 for (slice = 0; slice < mgp->num_slices; slice++) { 2563 ss = &mgp->ss[slice]; 2564 2565 status = myri10ge_get_txrx(mgp, slice); 2566 if (status != 0) { 2567 netdev_err(dev, "failed to get ring sizes or locations\n"); 2568 goto abort_with_rings; 2569 } 2570 status = myri10ge_allocate_rings(ss); 2571 if (status != 0) 2572 goto abort_with_rings; 2573 2574 /* only firmware which supports multiple TX queues 2575 * supports setting up the tx stats on non-zero 2576 * slices */ 2577 if (slice == 0 || mgp->dev->real_num_tx_queues > 1) 2578 status = myri10ge_set_stats(mgp, slice); 2579 if (status) { 2580 netdev_err(dev, "Couldn't set stats DMA\n"); 2581 goto abort_with_rings; 2582 } 2583 2584 /* Initialize the slice spinlock and state used for polling */ 2585 myri10ge_ss_init_lock(ss); 2586 2587 /* must happen prior to any irq */ 2588 napi_enable(&(ss)->napi); 2589 } 2590 2591 /* now give firmware buffers sizes, and MTU */ 2592 cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN; 2593 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_MTU, &cmd, 0); 2594 cmd.data0 = mgp->small_bytes; 2595 status |= 2596 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_SMALL_BUFFER_SIZE, &cmd, 0); 2597 cmd.data0 = big_pow2; 2598 status |= 2599 myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_BIG_BUFFER_SIZE, &cmd, 0); 2600 if (status) { 2601 netdev_err(dev, "Couldn't set buffer sizes\n"); 2602 goto abort_with_rings; 2603 } 2604 2605 /* 2606 * Set Linux style TSO mode; this is needed only on newer 2607 * firmware versions. Older versions default to Linux 2608 * style TSO 2609 */ 2610 cmd.data0 = 0; 2611 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_TSO_MODE, &cmd, 0); 2612 if (status && status != -ENOSYS) { 2613 netdev_err(dev, "Couldn't set TSO mode\n"); 2614 goto abort_with_rings; 2615 } 2616 2617 mgp->link_state = ~0U; 2618 mgp->rdma_tags_available = 15; 2619 2620 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_UP, &cmd, 0); 2621 if (status) { 2622 netdev_err(dev, "Couldn't bring up link\n"); 2623 goto abort_with_rings; 2624 } 2625 2626 mgp->running = MYRI10GE_ETH_RUNNING; 2627 mgp->watchdog_timer.expires = jiffies + myri10ge_watchdog_timeout * HZ; 2628 add_timer(&mgp->watchdog_timer); 2629 netif_tx_wake_all_queues(dev); 2630 2631 return 0; 2632 2633 abort_with_rings: 2634 while (slice) { 2635 slice--; 2636 napi_disable(&mgp->ss[slice].napi); 2637 } 2638 for (i = 0; i < mgp->num_slices; i++) 2639 myri10ge_free_rings(&mgp->ss[i]); 2640 2641 myri10ge_free_irq(mgp); 2642 2643 abort_with_nothing: 2644 mgp->running = MYRI10GE_ETH_STOPPED; 2645 return -ENOMEM; 2646 } 2647 2648 static int myri10ge_close(struct net_device *dev) 2649 { 2650 struct myri10ge_priv *mgp = netdev_priv(dev); 2651 struct myri10ge_cmd cmd; 2652 int status, old_down_cnt; 2653 int i; 2654 2655 if (mgp->running != MYRI10GE_ETH_RUNNING) 2656 return 0; 2657 2658 if (mgp->ss[0].tx.req_bytes == NULL) 2659 return 0; 2660 2661 del_timer_sync(&mgp->watchdog_timer); 2662 mgp->running = MYRI10GE_ETH_STOPPING; 2663 local_bh_disable(); /* myri10ge_ss_lock_napi needs bh disabled */ 2664 for (i = 0; i < mgp->num_slices; i++) { 2665 napi_disable(&mgp->ss[i].napi); 2666 /* Lock the slice to prevent the busy_poll handler from 2667 * accessing it. Later when we bring the NIC up, myri10ge_open 2668 * resets the slice including this lock. 2669 */ 2670 while (!myri10ge_ss_lock_napi(&mgp->ss[i])) { 2671 pr_info("Slice %d locked\n", i); 2672 mdelay(1); 2673 } 2674 } 2675 local_bh_enable(); 2676 netif_carrier_off(dev); 2677 2678 netif_tx_stop_all_queues(dev); 2679 if (mgp->rebooted == 0) { 2680 old_down_cnt = mgp->down_cnt; 2681 mb(); 2682 status = 2683 myri10ge_send_cmd(mgp, MXGEFW_CMD_ETHERNET_DOWN, &cmd, 0); 2684 if (status) 2685 netdev_err(dev, "Couldn't bring down link\n"); 2686 2687 wait_event_timeout(mgp->down_wq, old_down_cnt != mgp->down_cnt, 2688 HZ); 2689 if (old_down_cnt == mgp->down_cnt) 2690 netdev_err(dev, "never got down irq\n"); 2691 } 2692 netif_tx_disable(dev); 2693 myri10ge_free_irq(mgp); 2694 for (i = 0; i < mgp->num_slices; i++) 2695 myri10ge_free_rings(&mgp->ss[i]); 2696 2697 mgp->running = MYRI10GE_ETH_STOPPED; 2698 return 0; 2699 } 2700 2701 /* copy an array of struct mcp_kreq_ether_send's to the mcp. Copy 2702 * backwards one at a time and handle ring wraps */ 2703 2704 static inline void 2705 myri10ge_submit_req_backwards(struct myri10ge_tx_buf *tx, 2706 struct mcp_kreq_ether_send *src, int cnt) 2707 { 2708 int idx, starting_slot; 2709 starting_slot = tx->req; 2710 while (cnt > 1) { 2711 cnt--; 2712 idx = (starting_slot + cnt) & tx->mask; 2713 myri10ge_pio_copy(&tx->lanai[idx], &src[cnt], sizeof(*src)); 2714 mb(); 2715 } 2716 } 2717 2718 /* 2719 * copy an array of struct mcp_kreq_ether_send's to the mcp. Copy 2720 * at most 32 bytes at a time, so as to avoid involving the software 2721 * pio handler in the nic. We re-write the first segment's flags 2722 * to mark them valid only after writing the entire chain. 2723 */ 2724 2725 static inline void 2726 myri10ge_submit_req(struct myri10ge_tx_buf *tx, struct mcp_kreq_ether_send *src, 2727 int cnt) 2728 { 2729 int idx, i; 2730 struct mcp_kreq_ether_send __iomem *dstp, *dst; 2731 struct mcp_kreq_ether_send *srcp; 2732 u8 last_flags; 2733 2734 idx = tx->req & tx->mask; 2735 2736 last_flags = src->flags; 2737 src->flags = 0; 2738 mb(); 2739 dst = dstp = &tx->lanai[idx]; 2740 srcp = src; 2741 2742 if ((idx + cnt) < tx->mask) { 2743 for (i = 0; i < (cnt - 1); i += 2) { 2744 myri10ge_pio_copy(dstp, srcp, 2 * sizeof(*src)); 2745 mb(); /* force write every 32 bytes */ 2746 srcp += 2; 2747 dstp += 2; 2748 } 2749 } else { 2750 /* submit all but the first request, and ensure 2751 * that it is submitted below */ 2752 myri10ge_submit_req_backwards(tx, src, cnt); 2753 i = 0; 2754 } 2755 if (i < cnt) { 2756 /* submit the first request */ 2757 myri10ge_pio_copy(dstp, srcp, sizeof(*src)); 2758 mb(); /* barrier before setting valid flag */ 2759 } 2760 2761 /* re-write the last 32-bits with the valid flags */ 2762 src->flags = last_flags; 2763 put_be32(*((__be32 *) src + 3), (__be32 __iomem *) dst + 3); 2764 tx->req += cnt; 2765 mb(); 2766 } 2767 2768 /* 2769 * Transmit a packet. We need to split the packet so that a single 2770 * segment does not cross myri10ge->tx_boundary, so this makes segment 2771 * counting tricky. So rather than try to count segments up front, we 2772 * just give up if there are too few segments to hold a reasonably 2773 * fragmented packet currently available. If we run 2774 * out of segments while preparing a packet for DMA, we just linearize 2775 * it and try again. 2776 */ 2777 2778 static netdev_tx_t myri10ge_xmit(struct sk_buff *skb, 2779 struct net_device *dev) 2780 { 2781 struct myri10ge_priv *mgp = netdev_priv(dev); 2782 struct myri10ge_slice_state *ss; 2783 struct mcp_kreq_ether_send *req; 2784 struct myri10ge_tx_buf *tx; 2785 struct skb_frag_struct *frag; 2786 struct netdev_queue *netdev_queue; 2787 dma_addr_t bus; 2788 u32 low; 2789 __be32 high_swapped; 2790 unsigned int len; 2791 int idx, last_idx, avail, frag_cnt, frag_idx, count, mss, max_segments; 2792 u16 pseudo_hdr_offset, cksum_offset, queue; 2793 int cum_len, seglen, boundary, rdma_count; 2794 u8 flags, odd_flag; 2795 2796 queue = skb_get_queue_mapping(skb); 2797 ss = &mgp->ss[queue]; 2798 netdev_queue = netdev_get_tx_queue(mgp->dev, queue); 2799 tx = &ss->tx; 2800 2801 again: 2802 req = tx->req_list; 2803 avail = tx->mask - 1 - (tx->req - tx->done); 2804 2805 mss = 0; 2806 max_segments = MXGEFW_MAX_SEND_DESC; 2807 2808 if (skb_is_gso(skb)) { 2809 mss = skb_shinfo(skb)->gso_size; 2810 max_segments = MYRI10GE_MAX_SEND_DESC_TSO; 2811 } 2812 2813 if ((unlikely(avail < max_segments))) { 2814 /* we are out of transmit resources */ 2815 tx->stop_queue++; 2816 netif_tx_stop_queue(netdev_queue); 2817 return NETDEV_TX_BUSY; 2818 } 2819 2820 /* Setup checksum offloading, if needed */ 2821 cksum_offset = 0; 2822 pseudo_hdr_offset = 0; 2823 odd_flag = 0; 2824 flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST); 2825 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { 2826 cksum_offset = skb_checksum_start_offset(skb); 2827 pseudo_hdr_offset = cksum_offset + skb->csum_offset; 2828 /* If the headers are excessively large, then we must 2829 * fall back to a software checksum */ 2830 if (unlikely(!mss && (cksum_offset > 255 || 2831 pseudo_hdr_offset > 127))) { 2832 if (skb_checksum_help(skb)) 2833 goto drop; 2834 cksum_offset = 0; 2835 pseudo_hdr_offset = 0; 2836 } else { 2837 odd_flag = MXGEFW_FLAGS_ALIGN_ODD; 2838 flags |= MXGEFW_FLAGS_CKSUM; 2839 } 2840 } 2841 2842 cum_len = 0; 2843 2844 if (mss) { /* TSO */ 2845 /* this removes any CKSUM flag from before */ 2846 flags = (MXGEFW_FLAGS_TSO_HDR | MXGEFW_FLAGS_FIRST); 2847 2848 /* negative cum_len signifies to the 2849 * send loop that we are still in the 2850 * header portion of the TSO packet. 2851 * TSO header can be at most 1KB long */ 2852 cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb)); 2853 2854 /* for IPv6 TSO, the checksum offset stores the 2855 * TCP header length, to save the firmware from 2856 * the need to parse the headers */ 2857 if (skb_is_gso_v6(skb)) { 2858 cksum_offset = tcp_hdrlen(skb); 2859 /* Can only handle headers <= max_tso6 long */ 2860 if (unlikely(-cum_len > mgp->max_tso6)) 2861 return myri10ge_sw_tso(skb, dev); 2862 } 2863 /* for TSO, pseudo_hdr_offset holds mss. 2864 * The firmware figures out where to put 2865 * the checksum by parsing the header. */ 2866 pseudo_hdr_offset = mss; 2867 } else 2868 /* Mark small packets, and pad out tiny packets */ 2869 if (skb->len <= MXGEFW_SEND_SMALL_SIZE) { 2870 flags |= MXGEFW_FLAGS_SMALL; 2871 2872 /* pad frames to at least ETH_ZLEN bytes */ 2873 if (unlikely(skb->len < ETH_ZLEN)) { 2874 if (skb_padto(skb, ETH_ZLEN)) { 2875 /* The packet is gone, so we must 2876 * return 0 */ 2877 ss->stats.tx_dropped += 1; 2878 return NETDEV_TX_OK; 2879 } 2880 /* adjust the len to account for the zero pad 2881 * so that the nic can know how long it is */ 2882 skb->len = ETH_ZLEN; 2883 } 2884 } 2885 2886 /* map the skb for DMA */ 2887 len = skb_headlen(skb); 2888 idx = tx->req & tx->mask; 2889 tx->info[idx].skb = skb; 2890 bus = pci_map_single(mgp->pdev, skb->data, len, PCI_DMA_TODEVICE); 2891 dma_unmap_addr_set(&tx->info[idx], bus, bus); 2892 dma_unmap_len_set(&tx->info[idx], len, len); 2893 2894 frag_cnt = skb_shinfo(skb)->nr_frags; 2895 frag_idx = 0; 2896 count = 0; 2897 rdma_count = 0; 2898 2899 /* "rdma_count" is the number of RDMAs belonging to the 2900 * current packet BEFORE the current send request. For 2901 * non-TSO packets, this is equal to "count". 2902 * For TSO packets, rdma_count needs to be reset 2903 * to 0 after a segment cut. 2904 * 2905 * The rdma_count field of the send request is 2906 * the number of RDMAs of the packet starting at 2907 * that request. For TSO send requests with one ore more cuts 2908 * in the middle, this is the number of RDMAs starting 2909 * after the last cut in the request. All previous 2910 * segments before the last cut implicitly have 1 RDMA. 2911 * 2912 * Since the number of RDMAs is not known beforehand, 2913 * it must be filled-in retroactively - after each 2914 * segmentation cut or at the end of the entire packet. 2915 */ 2916 2917 while (1) { 2918 /* Break the SKB or Fragment up into pieces which 2919 * do not cross mgp->tx_boundary */ 2920 low = MYRI10GE_LOWPART_TO_U32(bus); 2921 high_swapped = htonl(MYRI10GE_HIGHPART_TO_U32(bus)); 2922 while (len) { 2923 u8 flags_next; 2924 int cum_len_next; 2925 2926 if (unlikely(count == max_segments)) 2927 goto abort_linearize; 2928 2929 boundary = 2930 (low + mgp->tx_boundary) & ~(mgp->tx_boundary - 1); 2931 seglen = boundary - low; 2932 if (seglen > len) 2933 seglen = len; 2934 flags_next = flags & ~MXGEFW_FLAGS_FIRST; 2935 cum_len_next = cum_len + seglen; 2936 if (mss) { /* TSO */ 2937 (req - rdma_count)->rdma_count = rdma_count + 1; 2938 2939 if (likely(cum_len >= 0)) { /* payload */ 2940 int next_is_first, chop; 2941 2942 chop = (cum_len_next > mss); 2943 cum_len_next = cum_len_next % mss; 2944 next_is_first = (cum_len_next == 0); 2945 flags |= chop * MXGEFW_FLAGS_TSO_CHOP; 2946 flags_next |= next_is_first * 2947 MXGEFW_FLAGS_FIRST; 2948 rdma_count |= -(chop | next_is_first); 2949 rdma_count += chop & ~next_is_first; 2950 } else if (likely(cum_len_next >= 0)) { /* header ends */ 2951 int small; 2952 2953 rdma_count = -1; 2954 cum_len_next = 0; 2955 seglen = -cum_len; 2956 small = (mss <= MXGEFW_SEND_SMALL_SIZE); 2957 flags_next = MXGEFW_FLAGS_TSO_PLD | 2958 MXGEFW_FLAGS_FIRST | 2959 (small * MXGEFW_FLAGS_SMALL); 2960 } 2961 } 2962 req->addr_high = high_swapped; 2963 req->addr_low = htonl(low); 2964 req->pseudo_hdr_offset = htons(pseudo_hdr_offset); 2965 req->pad = 0; /* complete solid 16-byte block; does this matter? */ 2966 req->rdma_count = 1; 2967 req->length = htons(seglen); 2968 req->cksum_offset = cksum_offset; 2969 req->flags = flags | ((cum_len & 1) * odd_flag); 2970 2971 low += seglen; 2972 len -= seglen; 2973 cum_len = cum_len_next; 2974 flags = flags_next; 2975 req++; 2976 count++; 2977 rdma_count++; 2978 if (cksum_offset != 0 && !(mss && skb_is_gso_v6(skb))) { 2979 if (unlikely(cksum_offset > seglen)) 2980 cksum_offset -= seglen; 2981 else 2982 cksum_offset = 0; 2983 } 2984 } 2985 if (frag_idx == frag_cnt) 2986 break; 2987 2988 /* map next fragment for DMA */ 2989 idx = (count + tx->req) & tx->mask; 2990 frag = &skb_shinfo(skb)->frags[frag_idx]; 2991 frag_idx++; 2992 len = skb_frag_size(frag); 2993 bus = skb_frag_dma_map(&mgp->pdev->dev, frag, 0, len, 2994 DMA_TO_DEVICE); 2995 dma_unmap_addr_set(&tx->info[idx], bus, bus); 2996 dma_unmap_len_set(&tx->info[idx], len, len); 2997 } 2998 2999 (req - rdma_count)->rdma_count = rdma_count; 3000 if (mss) 3001 do { 3002 req--; 3003 req->flags |= MXGEFW_FLAGS_TSO_LAST; 3004 } while (!(req->flags & (MXGEFW_FLAGS_TSO_CHOP | 3005 MXGEFW_FLAGS_FIRST))); 3006 idx = ((count - 1) + tx->req) & tx->mask; 3007 tx->info[idx].last = 1; 3008 myri10ge_submit_req(tx, tx->req_list, count); 3009 /* if using multiple tx queues, make sure NIC polls the 3010 * current slice */ 3011 if ((mgp->dev->real_num_tx_queues > 1) && tx->queue_active == 0) { 3012 tx->queue_active = 1; 3013 put_be32(htonl(1), tx->send_go); 3014 mb(); 3015 mmiowb(); 3016 } 3017 tx->pkt_start++; 3018 if ((avail - count) < MXGEFW_MAX_SEND_DESC) { 3019 tx->stop_queue++; 3020 netif_tx_stop_queue(netdev_queue); 3021 } 3022 return NETDEV_TX_OK; 3023 3024 abort_linearize: 3025 /* Free any DMA resources we've alloced and clear out the skb 3026 * slot so as to not trip up assertions, and to avoid a 3027 * double-free if linearizing fails */ 3028 3029 last_idx = (idx + 1) & tx->mask; 3030 idx = tx->req & tx->mask; 3031 tx->info[idx].skb = NULL; 3032 do { 3033 len = dma_unmap_len(&tx->info[idx], len); 3034 if (len) { 3035 if (tx->info[idx].skb != NULL) 3036 pci_unmap_single(mgp->pdev, 3037 dma_unmap_addr(&tx->info[idx], 3038 bus), len, 3039 PCI_DMA_TODEVICE); 3040 else 3041 pci_unmap_page(mgp->pdev, 3042 dma_unmap_addr(&tx->info[idx], 3043 bus), len, 3044 PCI_DMA_TODEVICE); 3045 dma_unmap_len_set(&tx->info[idx], len, 0); 3046 tx->info[idx].skb = NULL; 3047 } 3048 idx = (idx + 1) & tx->mask; 3049 } while (idx != last_idx); 3050 if (skb_is_gso(skb)) { 3051 netdev_err(mgp->dev, "TSO but wanted to linearize?!?!?\n"); 3052 goto drop; 3053 } 3054 3055 if (skb_linearize(skb)) 3056 goto drop; 3057 3058 tx->linearized++; 3059 goto again; 3060 3061 drop: 3062 dev_kfree_skb_any(skb); 3063 ss->stats.tx_dropped += 1; 3064 return NETDEV_TX_OK; 3065 3066 } 3067 3068 static netdev_tx_t myri10ge_sw_tso(struct sk_buff *skb, 3069 struct net_device *dev) 3070 { 3071 struct sk_buff *segs, *curr; 3072 struct myri10ge_priv *mgp = netdev_priv(dev); 3073 struct myri10ge_slice_state *ss; 3074 netdev_tx_t status; 3075 3076 segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO6); 3077 if (IS_ERR(segs)) 3078 goto drop; 3079 3080 while (segs) { 3081 curr = segs; 3082 segs = segs->next; 3083 curr->next = NULL; 3084 status = myri10ge_xmit(curr, dev); 3085 if (status != 0) { 3086 dev_kfree_skb_any(curr); 3087 if (segs != NULL) { 3088 curr = segs; 3089 segs = segs->next; 3090 curr->next = NULL; 3091 dev_kfree_skb_any(segs); 3092 } 3093 goto drop; 3094 } 3095 } 3096 dev_kfree_skb_any(skb); 3097 return NETDEV_TX_OK; 3098 3099 drop: 3100 ss = &mgp->ss[skb_get_queue_mapping(skb)]; 3101 dev_kfree_skb_any(skb); 3102 ss->stats.tx_dropped += 1; 3103 return NETDEV_TX_OK; 3104 } 3105 3106 static struct rtnl_link_stats64 *myri10ge_get_stats(struct net_device *dev, 3107 struct rtnl_link_stats64 *stats) 3108 { 3109 const struct myri10ge_priv *mgp = netdev_priv(dev); 3110 const struct myri10ge_slice_netstats *slice_stats; 3111 int i; 3112 3113 for (i = 0; i < mgp->num_slices; i++) { 3114 slice_stats = &mgp->ss[i].stats; 3115 stats->rx_packets += slice_stats->rx_packets; 3116 stats->tx_packets += slice_stats->tx_packets; 3117 stats->rx_bytes += slice_stats->rx_bytes; 3118 stats->tx_bytes += slice_stats->tx_bytes; 3119 stats->rx_dropped += slice_stats->rx_dropped; 3120 stats->tx_dropped += slice_stats->tx_dropped; 3121 } 3122 return stats; 3123 } 3124 3125 static void myri10ge_set_multicast_list(struct net_device *dev) 3126 { 3127 struct myri10ge_priv *mgp = netdev_priv(dev); 3128 struct myri10ge_cmd cmd; 3129 struct netdev_hw_addr *ha; 3130 __be32 data[2] = { 0, 0 }; 3131 int err; 3132 3133 /* can be called from atomic contexts, 3134 * pass 1 to force atomicity in myri10ge_send_cmd() */ 3135 myri10ge_change_promisc(mgp, dev->flags & IFF_PROMISC, 1); 3136 3137 /* This firmware is known to not support multicast */ 3138 if (!mgp->fw_multicast_support) 3139 return; 3140 3141 /* Disable multicast filtering */ 3142 3143 err = myri10ge_send_cmd(mgp, MXGEFW_ENABLE_ALLMULTI, &cmd, 1); 3144 if (err != 0) { 3145 netdev_err(dev, "Failed MXGEFW_ENABLE_ALLMULTI, error status: %d\n", 3146 err); 3147 goto abort; 3148 } 3149 3150 if ((dev->flags & IFF_ALLMULTI) || mgp->adopted_rx_filter_bug) { 3151 /* request to disable multicast filtering, so quit here */ 3152 return; 3153 } 3154 3155 /* Flush the filters */ 3156 3157 err = myri10ge_send_cmd(mgp, MXGEFW_LEAVE_ALL_MULTICAST_GROUPS, 3158 &cmd, 1); 3159 if (err != 0) { 3160 netdev_err(dev, "Failed MXGEFW_LEAVE_ALL_MULTICAST_GROUPS, error status: %d\n", 3161 err); 3162 goto abort; 3163 } 3164 3165 /* Walk the multicast list, and add each address */ 3166 netdev_for_each_mc_addr(ha, dev) { 3167 memcpy(data, &ha->addr, 6); 3168 cmd.data0 = ntohl(data[0]); 3169 cmd.data1 = ntohl(data[1]); 3170 err = myri10ge_send_cmd(mgp, MXGEFW_JOIN_MULTICAST_GROUP, 3171 &cmd, 1); 3172 3173 if (err != 0) { 3174 netdev_err(dev, "Failed MXGEFW_JOIN_MULTICAST_GROUP, error status:%d %pM\n", 3175 err, ha->addr); 3176 goto abort; 3177 } 3178 } 3179 /* Enable multicast filtering */ 3180 err = myri10ge_send_cmd(mgp, MXGEFW_DISABLE_ALLMULTI, &cmd, 1); 3181 if (err != 0) { 3182 netdev_err(dev, "Failed MXGEFW_DISABLE_ALLMULTI, error status: %d\n", 3183 err); 3184 goto abort; 3185 } 3186 3187 return; 3188 3189 abort: 3190 return; 3191 } 3192 3193 static int myri10ge_set_mac_address(struct net_device *dev, void *addr) 3194 { 3195 struct sockaddr *sa = addr; 3196 struct myri10ge_priv *mgp = netdev_priv(dev); 3197 int status; 3198 3199 if (!is_valid_ether_addr(sa->sa_data)) 3200 return -EADDRNOTAVAIL; 3201 3202 status = myri10ge_update_mac_address(mgp, sa->sa_data); 3203 if (status != 0) { 3204 netdev_err(dev, "changing mac address failed with %d\n", 3205 status); 3206 return status; 3207 } 3208 3209 /* change the dev structure */ 3210 memcpy(dev->dev_addr, sa->sa_data, 6); 3211 return 0; 3212 } 3213 3214 static int myri10ge_change_mtu(struct net_device *dev, int new_mtu) 3215 { 3216 struct myri10ge_priv *mgp = netdev_priv(dev); 3217 int error = 0; 3218 3219 if ((new_mtu < 68) || (ETH_HLEN + new_mtu > MYRI10GE_MAX_ETHER_MTU)) { 3220 netdev_err(dev, "new mtu (%d) is not valid\n", new_mtu); 3221 return -EINVAL; 3222 } 3223 netdev_info(dev, "changing mtu from %d to %d\n", dev->mtu, new_mtu); 3224 if (mgp->running) { 3225 /* if we change the mtu on an active device, we must 3226 * reset the device so the firmware sees the change */ 3227 myri10ge_close(dev); 3228 dev->mtu = new_mtu; 3229 myri10ge_open(dev); 3230 } else 3231 dev->mtu = new_mtu; 3232 3233 return error; 3234 } 3235 3236 /* 3237 * Enable ECRC to align PCI-E Completion packets on an 8-byte boundary. 3238 * Only do it if the bridge is a root port since we don't want to disturb 3239 * any other device, except if forced with myri10ge_ecrc_enable > 1. 3240 */ 3241 3242 static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp) 3243 { 3244 struct pci_dev *bridge = mgp->pdev->bus->self; 3245 struct device *dev = &mgp->pdev->dev; 3246 int cap; 3247 unsigned err_cap; 3248 int ret; 3249 3250 if (!myri10ge_ecrc_enable || !bridge) 3251 return; 3252 3253 /* check that the bridge is a root port */ 3254 if (pci_pcie_type(bridge) != PCI_EXP_TYPE_ROOT_PORT) { 3255 if (myri10ge_ecrc_enable > 1) { 3256 struct pci_dev *prev_bridge, *old_bridge = bridge; 3257 3258 /* Walk the hierarchy up to the root port 3259 * where ECRC has to be enabled */ 3260 do { 3261 prev_bridge = bridge; 3262 bridge = bridge->bus->self; 3263 if (!bridge || prev_bridge == bridge) { 3264 dev_err(dev, 3265 "Failed to find root port" 3266 " to force ECRC\n"); 3267 return; 3268 } 3269 } while (pci_pcie_type(bridge) != 3270 PCI_EXP_TYPE_ROOT_PORT); 3271 3272 dev_info(dev, 3273 "Forcing ECRC on non-root port %s" 3274 " (enabling on root port %s)\n", 3275 pci_name(old_bridge), pci_name(bridge)); 3276 } else { 3277 dev_err(dev, 3278 "Not enabling ECRC on non-root port %s\n", 3279 pci_name(bridge)); 3280 return; 3281 } 3282 } 3283 3284 cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR); 3285 if (!cap) 3286 return; 3287 3288 ret = pci_read_config_dword(bridge, cap + PCI_ERR_CAP, &err_cap); 3289 if (ret) { 3290 dev_err(dev, "failed reading ext-conf-space of %s\n", 3291 pci_name(bridge)); 3292 dev_err(dev, "\t pci=nommconf in use? " 3293 "or buggy/incomplete/absent ACPI MCFG attr?\n"); 3294 return; 3295 } 3296 if (!(err_cap & PCI_ERR_CAP_ECRC_GENC)) 3297 return; 3298 3299 err_cap |= PCI_ERR_CAP_ECRC_GENE; 3300 pci_write_config_dword(bridge, cap + PCI_ERR_CAP, err_cap); 3301 dev_info(dev, "Enabled ECRC on upstream bridge %s\n", pci_name(bridge)); 3302 } 3303 3304 /* 3305 * The Lanai Z8E PCI-E interface achieves higher Read-DMA throughput 3306 * when the PCI-E Completion packets are aligned on an 8-byte 3307 * boundary. Some PCI-E chip sets always align Completion packets; on 3308 * the ones that do not, the alignment can be enforced by enabling 3309 * ECRC generation (if supported). 3310 * 3311 * When PCI-E Completion packets are not aligned, it is actually more 3312 * efficient to limit Read-DMA transactions to 2KB, rather than 4KB. 3313 * 3314 * If the driver can neither enable ECRC nor verify that it has 3315 * already been enabled, then it must use a firmware image which works 3316 * around unaligned completion packets (myri10ge_rss_ethp_z8e.dat), and it 3317 * should also ensure that it never gives the device a Read-DMA which is 3318 * larger than 2KB by setting the tx_boundary to 2KB. If ECRC is 3319 * enabled, then the driver should use the aligned (myri10ge_rss_eth_z8e.dat) 3320 * firmware image, and set tx_boundary to 4KB. 3321 */ 3322 3323 static void myri10ge_firmware_probe(struct myri10ge_priv *mgp) 3324 { 3325 struct pci_dev *pdev = mgp->pdev; 3326 struct device *dev = &pdev->dev; 3327 int status; 3328 3329 mgp->tx_boundary = 4096; 3330 /* 3331 * Verify the max read request size was set to 4KB 3332 * before trying the test with 4KB. 3333 */ 3334 status = pcie_get_readrq(pdev); 3335 if (status < 0) { 3336 dev_err(dev, "Couldn't read max read req size: %d\n", status); 3337 goto abort; 3338 } 3339 if (status != 4096) { 3340 dev_warn(dev, "Max Read Request size != 4096 (%d)\n", status); 3341 mgp->tx_boundary = 2048; 3342 } 3343 /* 3344 * load the optimized firmware (which assumes aligned PCIe 3345 * completions) in order to see if it works on this host. 3346 */ 3347 set_fw_name(mgp, myri10ge_fw_aligned, false); 3348 status = myri10ge_load_firmware(mgp, 1); 3349 if (status != 0) { 3350 goto abort; 3351 } 3352 3353 /* 3354 * Enable ECRC if possible 3355 */ 3356 myri10ge_enable_ecrc(mgp); 3357 3358 /* 3359 * Run a DMA test which watches for unaligned completions and 3360 * aborts on the first one seen. 3361 */ 3362 3363 status = myri10ge_dma_test(mgp, MXGEFW_CMD_UNALIGNED_TEST); 3364 if (status == 0) 3365 return; /* keep the aligned firmware */ 3366 3367 if (status != -E2BIG) 3368 dev_warn(dev, "DMA test failed: %d\n", status); 3369 if (status == -ENOSYS) 3370 dev_warn(dev, "Falling back to ethp! " 3371 "Please install up to date fw\n"); 3372 abort: 3373 /* fall back to using the unaligned firmware */ 3374 mgp->tx_boundary = 2048; 3375 set_fw_name(mgp, myri10ge_fw_unaligned, false); 3376 } 3377 3378 static void myri10ge_select_firmware(struct myri10ge_priv *mgp) 3379 { 3380 int overridden = 0; 3381 3382 if (myri10ge_force_firmware == 0) { 3383 int link_width; 3384 u16 lnk; 3385 3386 pcie_capability_read_word(mgp->pdev, PCI_EXP_LNKSTA, &lnk); 3387 link_width = (lnk >> 4) & 0x3f; 3388 3389 /* Check to see if Link is less than 8 or if the 3390 * upstream bridge is known to provide aligned 3391 * completions */ 3392 if (link_width < 8) { 3393 dev_info(&mgp->pdev->dev, "PCIE x%d Link\n", 3394 link_width); 3395 mgp->tx_boundary = 4096; 3396 set_fw_name(mgp, myri10ge_fw_aligned, false); 3397 } else { 3398 myri10ge_firmware_probe(mgp); 3399 } 3400 } else { 3401 if (myri10ge_force_firmware == 1) { 3402 dev_info(&mgp->pdev->dev, 3403 "Assuming aligned completions (forced)\n"); 3404 mgp->tx_boundary = 4096; 3405 set_fw_name(mgp, myri10ge_fw_aligned, false); 3406 } else { 3407 dev_info(&mgp->pdev->dev, 3408 "Assuming unaligned completions (forced)\n"); 3409 mgp->tx_boundary = 2048; 3410 set_fw_name(mgp, myri10ge_fw_unaligned, false); 3411 } 3412 } 3413 3414 kparam_block_sysfs_write(myri10ge_fw_name); 3415 if (myri10ge_fw_name != NULL) { 3416 char *fw_name = kstrdup(myri10ge_fw_name, GFP_KERNEL); 3417 if (fw_name) { 3418 overridden = 1; 3419 set_fw_name(mgp, fw_name, true); 3420 } 3421 } 3422 kparam_unblock_sysfs_write(myri10ge_fw_name); 3423 3424 if (mgp->board_number < MYRI10GE_MAX_BOARDS && 3425 myri10ge_fw_names[mgp->board_number] != NULL && 3426 strlen(myri10ge_fw_names[mgp->board_number])) { 3427 set_fw_name(mgp, myri10ge_fw_names[mgp->board_number], false); 3428 overridden = 1; 3429 } 3430 if (overridden) 3431 dev_info(&mgp->pdev->dev, "overriding firmware to %s\n", 3432 mgp->fw_name); 3433 } 3434 3435 static void myri10ge_mask_surprise_down(struct pci_dev *pdev) 3436 { 3437 struct pci_dev *bridge = pdev->bus->self; 3438 int cap; 3439 u32 mask; 3440 3441 if (bridge == NULL) 3442 return; 3443 3444 cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR); 3445 if (cap) { 3446 /* a sram parity error can cause a surprise link 3447 * down; since we expect and can recover from sram 3448 * parity errors, mask surprise link down events */ 3449 pci_read_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, &mask); 3450 mask |= 0x20; 3451 pci_write_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, mask); 3452 } 3453 } 3454 3455 #ifdef CONFIG_PM 3456 static int myri10ge_suspend(struct pci_dev *pdev, pm_message_t state) 3457 { 3458 struct myri10ge_priv *mgp; 3459 struct net_device *netdev; 3460 3461 mgp = pci_get_drvdata(pdev); 3462 if (mgp == NULL) 3463 return -EINVAL; 3464 netdev = mgp->dev; 3465 3466 netif_device_detach(netdev); 3467 if (netif_running(netdev)) { 3468 netdev_info(netdev, "closing\n"); 3469 rtnl_lock(); 3470 myri10ge_close(netdev); 3471 rtnl_unlock(); 3472 } 3473 myri10ge_dummy_rdma(mgp, 0); 3474 pci_save_state(pdev); 3475 pci_disable_device(pdev); 3476 3477 return pci_set_power_state(pdev, pci_choose_state(pdev, state)); 3478 } 3479 3480 static int myri10ge_resume(struct pci_dev *pdev) 3481 { 3482 struct myri10ge_priv *mgp; 3483 struct net_device *netdev; 3484 int status; 3485 u16 vendor; 3486 3487 mgp = pci_get_drvdata(pdev); 3488 if (mgp == NULL) 3489 return -EINVAL; 3490 netdev = mgp->dev; 3491 pci_set_power_state(pdev, PCI_D0); /* zeros conf space as a side effect */ 3492 msleep(5); /* give card time to respond */ 3493 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor); 3494 if (vendor == 0xffff) { 3495 netdev_err(mgp->dev, "device disappeared!\n"); 3496 return -EIO; 3497 } 3498 3499 pci_restore_state(pdev); 3500 3501 status = pci_enable_device(pdev); 3502 if (status) { 3503 dev_err(&pdev->dev, "failed to enable device\n"); 3504 return status; 3505 } 3506 3507 pci_set_master(pdev); 3508 3509 myri10ge_reset(mgp); 3510 myri10ge_dummy_rdma(mgp, 1); 3511 3512 /* Save configuration space to be restored if the 3513 * nic resets due to a parity error */ 3514 pci_save_state(pdev); 3515 3516 if (netif_running(netdev)) { 3517 rtnl_lock(); 3518 status = myri10ge_open(netdev); 3519 rtnl_unlock(); 3520 if (status != 0) 3521 goto abort_with_enabled; 3522 3523 } 3524 netif_device_attach(netdev); 3525 3526 return 0; 3527 3528 abort_with_enabled: 3529 pci_disable_device(pdev); 3530 return -EIO; 3531 3532 } 3533 #endif /* CONFIG_PM */ 3534 3535 static u32 myri10ge_read_reboot(struct myri10ge_priv *mgp) 3536 { 3537 struct pci_dev *pdev = mgp->pdev; 3538 int vs = mgp->vendor_specific_offset; 3539 u32 reboot; 3540 3541 /*enter read32 mode */ 3542 pci_write_config_byte(pdev, vs + 0x10, 0x3); 3543 3544 /*read REBOOT_STATUS (0xfffffff0) */ 3545 pci_write_config_dword(pdev, vs + 0x18, 0xfffffff0); 3546 pci_read_config_dword(pdev, vs + 0x14, &reboot); 3547 return reboot; 3548 } 3549 3550 static void 3551 myri10ge_check_slice(struct myri10ge_slice_state *ss, int *reset_needed, 3552 int *busy_slice_cnt, u32 rx_pause_cnt) 3553 { 3554 struct myri10ge_priv *mgp = ss->mgp; 3555 int slice = ss - mgp->ss; 3556 3557 if (ss->tx.req != ss->tx.done && 3558 ss->tx.done == ss->watchdog_tx_done && 3559 ss->watchdog_tx_req != ss->watchdog_tx_done) { 3560 /* nic seems like it might be stuck.. */ 3561 if (rx_pause_cnt != mgp->watchdog_pause) { 3562 if (net_ratelimit()) 3563 netdev_warn(mgp->dev, "slice %d: TX paused, " 3564 "check link partner\n", slice); 3565 } else { 3566 netdev_warn(mgp->dev, 3567 "slice %d: TX stuck %d %d %d %d %d %d\n", 3568 slice, ss->tx.queue_active, ss->tx.req, 3569 ss->tx.done, ss->tx.pkt_start, 3570 ss->tx.pkt_done, 3571 (int)ntohl(mgp->ss[slice].fw_stats-> 3572 send_done_count)); 3573 *reset_needed = 1; 3574 ss->stuck = 1; 3575 } 3576 } 3577 if (ss->watchdog_tx_done != ss->tx.done || 3578 ss->watchdog_rx_done != ss->rx_done.cnt) { 3579 *busy_slice_cnt += 1; 3580 } 3581 ss->watchdog_tx_done = ss->tx.done; 3582 ss->watchdog_tx_req = ss->tx.req; 3583 ss->watchdog_rx_done = ss->rx_done.cnt; 3584 } 3585 3586 /* 3587 * This watchdog is used to check whether the board has suffered 3588 * from a parity error and needs to be recovered. 3589 */ 3590 static void myri10ge_watchdog(struct work_struct *work) 3591 { 3592 struct myri10ge_priv *mgp = 3593 container_of(work, struct myri10ge_priv, watchdog_work); 3594 struct myri10ge_slice_state *ss; 3595 u32 reboot, rx_pause_cnt; 3596 int status, rebooted; 3597 int i; 3598 int reset_needed = 0; 3599 int busy_slice_cnt = 0; 3600 u16 cmd, vendor; 3601 3602 mgp->watchdog_resets++; 3603 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd); 3604 rebooted = 0; 3605 if ((cmd & PCI_COMMAND_MASTER) == 0) { 3606 /* Bus master DMA disabled? Check to see 3607 * if the card rebooted due to a parity error 3608 * For now, just report it */ 3609 reboot = myri10ge_read_reboot(mgp); 3610 netdev_err(mgp->dev, "NIC rebooted (0x%x),%s resetting\n", 3611 reboot, myri10ge_reset_recover ? "" : " not"); 3612 if (myri10ge_reset_recover == 0) 3613 return; 3614 rtnl_lock(); 3615 mgp->rebooted = 1; 3616 rebooted = 1; 3617 myri10ge_close(mgp->dev); 3618 myri10ge_reset_recover--; 3619 mgp->rebooted = 0; 3620 /* 3621 * A rebooted nic will come back with config space as 3622 * it was after power was applied to PCIe bus. 3623 * Attempt to restore config space which was saved 3624 * when the driver was loaded, or the last time the 3625 * nic was resumed from power saving mode. 3626 */ 3627 pci_restore_state(mgp->pdev); 3628 3629 /* save state again for accounting reasons */ 3630 pci_save_state(mgp->pdev); 3631 3632 } else { 3633 /* if we get back -1's from our slot, perhaps somebody 3634 * powered off our card. Don't try to reset it in 3635 * this case */ 3636 if (cmd == 0xffff) { 3637 pci_read_config_word(mgp->pdev, PCI_VENDOR_ID, &vendor); 3638 if (vendor == 0xffff) { 3639 netdev_err(mgp->dev, "device disappeared!\n"); 3640 return; 3641 } 3642 } 3643 /* Perhaps it is a software error. See if stuck slice 3644 * has recovered, reset if not */ 3645 rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause); 3646 for (i = 0; i < mgp->num_slices; i++) { 3647 ss = mgp->ss; 3648 if (ss->stuck) { 3649 myri10ge_check_slice(ss, &reset_needed, 3650 &busy_slice_cnt, 3651 rx_pause_cnt); 3652 ss->stuck = 0; 3653 } 3654 } 3655 if (!reset_needed) { 3656 netdev_dbg(mgp->dev, "not resetting\n"); 3657 return; 3658 } 3659 3660 netdev_err(mgp->dev, "device timeout, resetting\n"); 3661 } 3662 3663 if (!rebooted) { 3664 rtnl_lock(); 3665 myri10ge_close(mgp->dev); 3666 } 3667 status = myri10ge_load_firmware(mgp, 1); 3668 if (status != 0) 3669 netdev_err(mgp->dev, "failed to load firmware\n"); 3670 else 3671 myri10ge_open(mgp->dev); 3672 rtnl_unlock(); 3673 } 3674 3675 /* 3676 * We use our own timer routine rather than relying upon 3677 * netdev->tx_timeout because we have a very large hardware transmit 3678 * queue. Due to the large queue, the netdev->tx_timeout function 3679 * cannot detect a NIC with a parity error in a timely fashion if the 3680 * NIC is lightly loaded. 3681 */ 3682 static void myri10ge_watchdog_timer(unsigned long arg) 3683 { 3684 struct myri10ge_priv *mgp; 3685 struct myri10ge_slice_state *ss; 3686 int i, reset_needed, busy_slice_cnt; 3687 u32 rx_pause_cnt; 3688 u16 cmd; 3689 3690 mgp = (struct myri10ge_priv *)arg; 3691 3692 rx_pause_cnt = ntohl(mgp->ss[0].fw_stats->dropped_pause); 3693 busy_slice_cnt = 0; 3694 for (i = 0, reset_needed = 0; 3695 i < mgp->num_slices && reset_needed == 0; ++i) { 3696 3697 ss = &mgp->ss[i]; 3698 if (ss->rx_small.watchdog_needed) { 3699 myri10ge_alloc_rx_pages(mgp, &ss->rx_small, 3700 mgp->small_bytes + MXGEFW_PAD, 3701 1); 3702 if (ss->rx_small.fill_cnt - ss->rx_small.cnt >= 3703 myri10ge_fill_thresh) 3704 ss->rx_small.watchdog_needed = 0; 3705 } 3706 if (ss->rx_big.watchdog_needed) { 3707 myri10ge_alloc_rx_pages(mgp, &ss->rx_big, 3708 mgp->big_bytes, 1); 3709 if (ss->rx_big.fill_cnt - ss->rx_big.cnt >= 3710 myri10ge_fill_thresh) 3711 ss->rx_big.watchdog_needed = 0; 3712 } 3713 myri10ge_check_slice(ss, &reset_needed, &busy_slice_cnt, 3714 rx_pause_cnt); 3715 } 3716 /* if we've sent or received no traffic, poll the NIC to 3717 * ensure it is still there. Otherwise, we risk not noticing 3718 * an error in a timely fashion */ 3719 if (busy_slice_cnt == 0) { 3720 pci_read_config_word(mgp->pdev, PCI_COMMAND, &cmd); 3721 if ((cmd & PCI_COMMAND_MASTER) == 0) { 3722 reset_needed = 1; 3723 } 3724 } 3725 mgp->watchdog_pause = rx_pause_cnt; 3726 3727 if (reset_needed) { 3728 schedule_work(&mgp->watchdog_work); 3729 } else { 3730 /* rearm timer */ 3731 mod_timer(&mgp->watchdog_timer, 3732 jiffies + myri10ge_watchdog_timeout * HZ); 3733 } 3734 } 3735 3736 static void myri10ge_free_slices(struct myri10ge_priv *mgp) 3737 { 3738 struct myri10ge_slice_state *ss; 3739 struct pci_dev *pdev = mgp->pdev; 3740 size_t bytes; 3741 int i; 3742 3743 if (mgp->ss == NULL) 3744 return; 3745 3746 for (i = 0; i < mgp->num_slices; i++) { 3747 ss = &mgp->ss[i]; 3748 if (ss->rx_done.entry != NULL) { 3749 bytes = mgp->max_intr_slots * 3750 sizeof(*ss->rx_done.entry); 3751 dma_free_coherent(&pdev->dev, bytes, 3752 ss->rx_done.entry, ss->rx_done.bus); 3753 ss->rx_done.entry = NULL; 3754 } 3755 if (ss->fw_stats != NULL) { 3756 bytes = sizeof(*ss->fw_stats); 3757 dma_free_coherent(&pdev->dev, bytes, 3758 ss->fw_stats, ss->fw_stats_bus); 3759 ss->fw_stats = NULL; 3760 } 3761 napi_hash_del(&ss->napi); 3762 netif_napi_del(&ss->napi); 3763 } 3764 /* Wait till napi structs are no longer used, and then free ss. */ 3765 synchronize_rcu(); 3766 kfree(mgp->ss); 3767 mgp->ss = NULL; 3768 } 3769 3770 static int myri10ge_alloc_slices(struct myri10ge_priv *mgp) 3771 { 3772 struct myri10ge_slice_state *ss; 3773 struct pci_dev *pdev = mgp->pdev; 3774 size_t bytes; 3775 int i; 3776 3777 bytes = sizeof(*mgp->ss) * mgp->num_slices; 3778 mgp->ss = kzalloc(bytes, GFP_KERNEL); 3779 if (mgp->ss == NULL) { 3780 return -ENOMEM; 3781 } 3782 3783 for (i = 0; i < mgp->num_slices; i++) { 3784 ss = &mgp->ss[i]; 3785 bytes = mgp->max_intr_slots * sizeof(*ss->rx_done.entry); 3786 ss->rx_done.entry = dma_zalloc_coherent(&pdev->dev, bytes, 3787 &ss->rx_done.bus, 3788 GFP_KERNEL); 3789 if (ss->rx_done.entry == NULL) 3790 goto abort; 3791 bytes = sizeof(*ss->fw_stats); 3792 ss->fw_stats = dma_alloc_coherent(&pdev->dev, bytes, 3793 &ss->fw_stats_bus, 3794 GFP_KERNEL); 3795 if (ss->fw_stats == NULL) 3796 goto abort; 3797 ss->mgp = mgp; 3798 ss->dev = mgp->dev; 3799 netif_napi_add(ss->dev, &ss->napi, myri10ge_poll, 3800 myri10ge_napi_weight); 3801 napi_hash_add(&ss->napi); 3802 } 3803 return 0; 3804 abort: 3805 myri10ge_free_slices(mgp); 3806 return -ENOMEM; 3807 } 3808 3809 /* 3810 * This function determines the number of slices supported. 3811 * The number slices is the minimum of the number of CPUS, 3812 * the number of MSI-X irqs supported, the number of slices 3813 * supported by the firmware 3814 */ 3815 static void myri10ge_probe_slices(struct myri10ge_priv *mgp) 3816 { 3817 struct myri10ge_cmd cmd; 3818 struct pci_dev *pdev = mgp->pdev; 3819 char *old_fw; 3820 bool old_allocated; 3821 int i, status, ncpus; 3822 3823 mgp->num_slices = 1; 3824 ncpus = netif_get_num_default_rss_queues(); 3825 3826 if (myri10ge_max_slices == 1 || !pdev->msix_cap || 3827 (myri10ge_max_slices == -1 && ncpus < 2)) 3828 return; 3829 3830 /* try to load the slice aware rss firmware */ 3831 old_fw = mgp->fw_name; 3832 old_allocated = mgp->fw_name_allocated; 3833 /* don't free old_fw if we override it. */ 3834 mgp->fw_name_allocated = false; 3835 3836 if (myri10ge_fw_name != NULL) { 3837 dev_info(&mgp->pdev->dev, "overriding rss firmware to %s\n", 3838 myri10ge_fw_name); 3839 set_fw_name(mgp, myri10ge_fw_name, false); 3840 } else if (old_fw == myri10ge_fw_aligned) 3841 set_fw_name(mgp, myri10ge_fw_rss_aligned, false); 3842 else 3843 set_fw_name(mgp, myri10ge_fw_rss_unaligned, false); 3844 status = myri10ge_load_firmware(mgp, 0); 3845 if (status != 0) { 3846 dev_info(&pdev->dev, "Rss firmware not found\n"); 3847 if (old_allocated) 3848 kfree(old_fw); 3849 return; 3850 } 3851 3852 /* hit the board with a reset to ensure it is alive */ 3853 memset(&cmd, 0, sizeof(cmd)); 3854 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_RESET, &cmd, 0); 3855 if (status != 0) { 3856 dev_err(&mgp->pdev->dev, "failed reset\n"); 3857 goto abort_with_fw; 3858 } 3859 3860 mgp->max_intr_slots = cmd.data0 / sizeof(struct mcp_slot); 3861 3862 /* tell it the size of the interrupt queues */ 3863 cmd.data0 = mgp->max_intr_slots * sizeof(struct mcp_slot); 3864 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_SET_INTRQ_SIZE, &cmd, 0); 3865 if (status != 0) { 3866 dev_err(&mgp->pdev->dev, "failed MXGEFW_CMD_SET_INTRQ_SIZE\n"); 3867 goto abort_with_fw; 3868 } 3869 3870 /* ask the maximum number of slices it supports */ 3871 status = myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_MAX_RSS_QUEUES, &cmd, 0); 3872 if (status != 0) 3873 goto abort_with_fw; 3874 else 3875 mgp->num_slices = cmd.data0; 3876 3877 /* Only allow multiple slices if MSI-X is usable */ 3878 if (!myri10ge_msi) { 3879 goto abort_with_fw; 3880 } 3881 3882 /* if the admin did not specify a limit to how many 3883 * slices we should use, cap it automatically to the 3884 * number of CPUs currently online */ 3885 if (myri10ge_max_slices == -1) 3886 myri10ge_max_slices = ncpus; 3887 3888 if (mgp->num_slices > myri10ge_max_slices) 3889 mgp->num_slices = myri10ge_max_slices; 3890 3891 /* Now try to allocate as many MSI-X vectors as we have 3892 * slices. We give up on MSI-X if we can only get a single 3893 * vector. */ 3894 3895 mgp->msix_vectors = kcalloc(mgp->num_slices, sizeof(*mgp->msix_vectors), 3896 GFP_KERNEL); 3897 if (mgp->msix_vectors == NULL) 3898 goto disable_msix; 3899 for (i = 0; i < mgp->num_slices; i++) { 3900 mgp->msix_vectors[i].entry = i; 3901 } 3902 3903 while (mgp->num_slices > 1) { 3904 /* make sure it is a power of two */ 3905 while (!is_power_of_2(mgp->num_slices)) 3906 mgp->num_slices--; 3907 if (mgp->num_slices == 1) 3908 goto disable_msix; 3909 status = pci_enable_msix(pdev, mgp->msix_vectors, 3910 mgp->num_slices); 3911 if (status == 0) { 3912 pci_disable_msix(pdev); 3913 if (old_allocated) 3914 kfree(old_fw); 3915 return; 3916 } 3917 if (status > 0) 3918 mgp->num_slices = status; 3919 else 3920 goto disable_msix; 3921 } 3922 3923 disable_msix: 3924 if (mgp->msix_vectors != NULL) { 3925 kfree(mgp->msix_vectors); 3926 mgp->msix_vectors = NULL; 3927 } 3928 3929 abort_with_fw: 3930 mgp->num_slices = 1; 3931 set_fw_name(mgp, old_fw, old_allocated); 3932 myri10ge_load_firmware(mgp, 0); 3933 } 3934 3935 static const struct net_device_ops myri10ge_netdev_ops = { 3936 .ndo_open = myri10ge_open, 3937 .ndo_stop = myri10ge_close, 3938 .ndo_start_xmit = myri10ge_xmit, 3939 .ndo_get_stats64 = myri10ge_get_stats, 3940 .ndo_validate_addr = eth_validate_addr, 3941 .ndo_change_mtu = myri10ge_change_mtu, 3942 .ndo_set_rx_mode = myri10ge_set_multicast_list, 3943 .ndo_set_mac_address = myri10ge_set_mac_address, 3944 #ifdef CONFIG_NET_RX_BUSY_POLL 3945 .ndo_busy_poll = myri10ge_busy_poll, 3946 #endif 3947 }; 3948 3949 static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 3950 { 3951 struct net_device *netdev; 3952 struct myri10ge_priv *mgp; 3953 struct device *dev = &pdev->dev; 3954 int i; 3955 int status = -ENXIO; 3956 int dac_enabled; 3957 unsigned hdr_offset, ss_offset; 3958 static int board_number; 3959 3960 netdev = alloc_etherdev_mq(sizeof(*mgp), MYRI10GE_MAX_SLICES); 3961 if (netdev == NULL) 3962 return -ENOMEM; 3963 3964 SET_NETDEV_DEV(netdev, &pdev->dev); 3965 3966 mgp = netdev_priv(netdev); 3967 mgp->dev = netdev; 3968 mgp->pdev = pdev; 3969 mgp->pause = myri10ge_flow_control; 3970 mgp->intr_coal_delay = myri10ge_intr_coal_delay; 3971 mgp->msg_enable = netif_msg_init(myri10ge_debug, MYRI10GE_MSG_DEFAULT); 3972 mgp->board_number = board_number; 3973 init_waitqueue_head(&mgp->down_wq); 3974 3975 if (pci_enable_device(pdev)) { 3976 dev_err(&pdev->dev, "pci_enable_device call failed\n"); 3977 status = -ENODEV; 3978 goto abort_with_netdev; 3979 } 3980 3981 /* Find the vendor-specific cap so we can check 3982 * the reboot register later on */ 3983 mgp->vendor_specific_offset 3984 = pci_find_capability(pdev, PCI_CAP_ID_VNDR); 3985 3986 /* Set our max read request to 4KB */ 3987 status = pcie_set_readrq(pdev, 4096); 3988 if (status != 0) { 3989 dev_err(&pdev->dev, "Error %d writing PCI_EXP_DEVCTL\n", 3990 status); 3991 goto abort_with_enabled; 3992 } 3993 3994 myri10ge_mask_surprise_down(pdev); 3995 pci_set_master(pdev); 3996 dac_enabled = 1; 3997 status = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); 3998 if (status != 0) { 3999 dac_enabled = 0; 4000 dev_err(&pdev->dev, 4001 "64-bit pci address mask was refused, " 4002 "trying 32-bit\n"); 4003 status = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 4004 } 4005 if (status != 0) { 4006 dev_err(&pdev->dev, "Error %d setting DMA mask\n", status); 4007 goto abort_with_enabled; 4008 } 4009 (void)pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 4010 mgp->cmd = dma_alloc_coherent(&pdev->dev, sizeof(*mgp->cmd), 4011 &mgp->cmd_bus, GFP_KERNEL); 4012 if (mgp->cmd == NULL) 4013 goto abort_with_enabled; 4014 4015 mgp->board_span = pci_resource_len(pdev, 0); 4016 mgp->iomem_base = pci_resource_start(pdev, 0); 4017 mgp->mtrr = -1; 4018 mgp->wc_enabled = 0; 4019 #ifdef CONFIG_MTRR 4020 mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span, 4021 MTRR_TYPE_WRCOMB, 1); 4022 if (mgp->mtrr >= 0) 4023 mgp->wc_enabled = 1; 4024 #endif 4025 mgp->sram = ioremap_wc(mgp->iomem_base, mgp->board_span); 4026 if (mgp->sram == NULL) { 4027 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n", 4028 mgp->board_span, mgp->iomem_base); 4029 status = -ENXIO; 4030 goto abort_with_mtrr; 4031 } 4032 hdr_offset = 4033 swab32(readl(mgp->sram + MCP_HEADER_PTR_OFFSET)) & 0xffffc; 4034 ss_offset = hdr_offset + offsetof(struct mcp_gen_header, string_specs); 4035 mgp->sram_size = swab32(readl(mgp->sram + ss_offset)); 4036 if (mgp->sram_size > mgp->board_span || 4037 mgp->sram_size <= MYRI10GE_FW_OFFSET) { 4038 dev_err(&pdev->dev, 4039 "invalid sram_size %dB or board span %ldB\n", 4040 mgp->sram_size, mgp->board_span); 4041 goto abort_with_ioremap; 4042 } 4043 memcpy_fromio(mgp->eeprom_strings, 4044 mgp->sram + mgp->sram_size, MYRI10GE_EEPROM_STRINGS_SIZE); 4045 memset(mgp->eeprom_strings + MYRI10GE_EEPROM_STRINGS_SIZE - 2, 0, 2); 4046 status = myri10ge_read_mac_addr(mgp); 4047 if (status) 4048 goto abort_with_ioremap; 4049 4050 for (i = 0; i < ETH_ALEN; i++) 4051 netdev->dev_addr[i] = mgp->mac_addr[i]; 4052 4053 myri10ge_select_firmware(mgp); 4054 4055 status = myri10ge_load_firmware(mgp, 1); 4056 if (status != 0) { 4057 dev_err(&pdev->dev, "failed to load firmware\n"); 4058 goto abort_with_ioremap; 4059 } 4060 myri10ge_probe_slices(mgp); 4061 status = myri10ge_alloc_slices(mgp); 4062 if (status != 0) { 4063 dev_err(&pdev->dev, "failed to alloc slice state\n"); 4064 goto abort_with_firmware; 4065 } 4066 netif_set_real_num_tx_queues(netdev, mgp->num_slices); 4067 netif_set_real_num_rx_queues(netdev, mgp->num_slices); 4068 status = myri10ge_reset(mgp); 4069 if (status != 0) { 4070 dev_err(&pdev->dev, "failed reset\n"); 4071 goto abort_with_slices; 4072 } 4073 #ifdef CONFIG_MYRI10GE_DCA 4074 myri10ge_setup_dca(mgp); 4075 #endif 4076 pci_set_drvdata(pdev, mgp); 4077 if ((myri10ge_initial_mtu + ETH_HLEN) > MYRI10GE_MAX_ETHER_MTU) 4078 myri10ge_initial_mtu = MYRI10GE_MAX_ETHER_MTU - ETH_HLEN; 4079 if ((myri10ge_initial_mtu + ETH_HLEN) < 68) 4080 myri10ge_initial_mtu = 68; 4081 4082 netdev->netdev_ops = &myri10ge_netdev_ops; 4083 netdev->mtu = myri10ge_initial_mtu; 4084 netdev->hw_features = mgp->features | NETIF_F_RXCSUM; 4085 4086 /* fake NETIF_F_HW_VLAN_CTAG_RX for good GRO performance */ 4087 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; 4088 4089 netdev->features = netdev->hw_features; 4090 4091 if (dac_enabled) 4092 netdev->features |= NETIF_F_HIGHDMA; 4093 4094 netdev->vlan_features |= mgp->features; 4095 if (mgp->fw_ver_tiny < 37) 4096 netdev->vlan_features &= ~NETIF_F_TSO6; 4097 if (mgp->fw_ver_tiny < 32) 4098 netdev->vlan_features &= ~NETIF_F_TSO; 4099 4100 /* make sure we can get an irq, and that MSI can be 4101 * setup (if available). */ 4102 status = myri10ge_request_irq(mgp); 4103 if (status != 0) 4104 goto abort_with_firmware; 4105 myri10ge_free_irq(mgp); 4106 4107 /* Save configuration space to be restored if the 4108 * nic resets due to a parity error */ 4109 pci_save_state(pdev); 4110 4111 /* Setup the watchdog timer */ 4112 setup_timer(&mgp->watchdog_timer, myri10ge_watchdog_timer, 4113 (unsigned long)mgp); 4114 4115 SET_ETHTOOL_OPS(netdev, &myri10ge_ethtool_ops); 4116 INIT_WORK(&mgp->watchdog_work, myri10ge_watchdog); 4117 status = register_netdev(netdev); 4118 if (status != 0) { 4119 dev_err(&pdev->dev, "register_netdev failed: %d\n", status); 4120 goto abort_with_state; 4121 } 4122 if (mgp->msix_enabled) 4123 dev_info(dev, "%d MSI-X IRQs, tx bndry %d, fw %s, WC %s\n", 4124 mgp->num_slices, mgp->tx_boundary, mgp->fw_name, 4125 (mgp->wc_enabled ? "Enabled" : "Disabled")); 4126 else 4127 dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, WC %s\n", 4128 mgp->msi_enabled ? "MSI" : "xPIC", 4129 pdev->irq, mgp->tx_boundary, mgp->fw_name, 4130 (mgp->wc_enabled ? "Enabled" : "Disabled")); 4131 4132 board_number++; 4133 return 0; 4134 4135 abort_with_state: 4136 pci_restore_state(pdev); 4137 4138 abort_with_slices: 4139 myri10ge_free_slices(mgp); 4140 4141 abort_with_firmware: 4142 myri10ge_dummy_rdma(mgp, 0); 4143 4144 abort_with_ioremap: 4145 if (mgp->mac_addr_string != NULL) 4146 dev_err(&pdev->dev, 4147 "myri10ge_probe() failed: MAC=%s, SN=%ld\n", 4148 mgp->mac_addr_string, mgp->serial_number); 4149 iounmap(mgp->sram); 4150 4151 abort_with_mtrr: 4152 #ifdef CONFIG_MTRR 4153 if (mgp->mtrr >= 0) 4154 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span); 4155 #endif 4156 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd), 4157 mgp->cmd, mgp->cmd_bus); 4158 4159 abort_with_enabled: 4160 pci_disable_device(pdev); 4161 4162 abort_with_netdev: 4163 set_fw_name(mgp, NULL, false); 4164 free_netdev(netdev); 4165 return status; 4166 } 4167 4168 /* 4169 * myri10ge_remove 4170 * 4171 * Does what is necessary to shutdown one Myrinet device. Called 4172 * once for each Myrinet card by the kernel when a module is 4173 * unloaded. 4174 */ 4175 static void myri10ge_remove(struct pci_dev *pdev) 4176 { 4177 struct myri10ge_priv *mgp; 4178 struct net_device *netdev; 4179 4180 mgp = pci_get_drvdata(pdev); 4181 if (mgp == NULL) 4182 return; 4183 4184 cancel_work_sync(&mgp->watchdog_work); 4185 netdev = mgp->dev; 4186 unregister_netdev(netdev); 4187 4188 #ifdef CONFIG_MYRI10GE_DCA 4189 myri10ge_teardown_dca(mgp); 4190 #endif 4191 myri10ge_dummy_rdma(mgp, 0); 4192 4193 /* avoid a memory leak */ 4194 pci_restore_state(pdev); 4195 4196 iounmap(mgp->sram); 4197 4198 #ifdef CONFIG_MTRR 4199 if (mgp->mtrr >= 0) 4200 mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span); 4201 #endif 4202 myri10ge_free_slices(mgp); 4203 if (mgp->msix_vectors != NULL) 4204 kfree(mgp->msix_vectors); 4205 dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd), 4206 mgp->cmd, mgp->cmd_bus); 4207 4208 set_fw_name(mgp, NULL, false); 4209 free_netdev(netdev); 4210 pci_disable_device(pdev); 4211 pci_set_drvdata(pdev, NULL); 4212 } 4213 4214 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E 0x0008 4215 #define PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9 0x0009 4216 4217 static DEFINE_PCI_DEVICE_TABLE(myri10ge_pci_tbl) = { 4218 {PCI_DEVICE(PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E)}, 4219 {PCI_DEVICE 4220 (PCI_VENDOR_ID_MYRICOM, PCI_DEVICE_ID_MYRICOM_MYRI10GE_Z8E_9)}, 4221 {0}, 4222 }; 4223 4224 MODULE_DEVICE_TABLE(pci, myri10ge_pci_tbl); 4225 4226 static struct pci_driver myri10ge_driver = { 4227 .name = "myri10ge", 4228 .probe = myri10ge_probe, 4229 .remove = myri10ge_remove, 4230 .id_table = myri10ge_pci_tbl, 4231 #ifdef CONFIG_PM 4232 .suspend = myri10ge_suspend, 4233 .resume = myri10ge_resume, 4234 #endif 4235 }; 4236 4237 #ifdef CONFIG_MYRI10GE_DCA 4238 static int 4239 myri10ge_notify_dca(struct notifier_block *nb, unsigned long event, void *p) 4240 { 4241 int err = driver_for_each_device(&myri10ge_driver.driver, 4242 NULL, &event, 4243 myri10ge_notify_dca_device); 4244 4245 if (err) 4246 return NOTIFY_BAD; 4247 return NOTIFY_DONE; 4248 } 4249 4250 static struct notifier_block myri10ge_dca_notifier = { 4251 .notifier_call = myri10ge_notify_dca, 4252 .next = NULL, 4253 .priority = 0, 4254 }; 4255 #endif /* CONFIG_MYRI10GE_DCA */ 4256 4257 static __init int myri10ge_init_module(void) 4258 { 4259 pr_info("Version %s\n", MYRI10GE_VERSION_STR); 4260 4261 if (myri10ge_rss_hash > MXGEFW_RSS_HASH_TYPE_MAX) { 4262 pr_err("Illegal rssh hash type %d, defaulting to source port\n", 4263 myri10ge_rss_hash); 4264 myri10ge_rss_hash = MXGEFW_RSS_HASH_TYPE_SRC_PORT; 4265 } 4266 #ifdef CONFIG_MYRI10GE_DCA 4267 dca_register_notify(&myri10ge_dca_notifier); 4268 #endif 4269 if (myri10ge_max_slices > MYRI10GE_MAX_SLICES) 4270 myri10ge_max_slices = MYRI10GE_MAX_SLICES; 4271 4272 return pci_register_driver(&myri10ge_driver); 4273 } 4274 4275 module_init(myri10ge_init_module); 4276 4277 static __exit void myri10ge_cleanup_module(void) 4278 { 4279 #ifdef CONFIG_MYRI10GE_DCA 4280 dca_unregister_notify(&myri10ge_dca_notifier); 4281 #endif 4282 pci_unregister_driver(&myri10ge_driver); 4283 } 4284 4285 module_exit(myri10ge_cleanup_module); 4286