1/* 2 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved. 3 * Copyright 2007 Nuova Systems, Inc. All rights reserved. 4 * 5 * This program is free software; you may redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; version 2 of the License. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 16 * SOFTWARE. 17 * 18 */ 19 20#include <linux/module.h> 21#include <linux/kernel.h> 22#include <linux/string.h> 23#include <linux/errno.h> 24#include <linux/types.h> 25#include <linux/init.h> 26#include <linux/interrupt.h> 27#include <linux/workqueue.h> 28#include <linux/pci.h> 29#include <linux/netdevice.h> 30#include <linux/etherdevice.h> 31#include <linux/if.h> 32#include <linux/if_ether.h> 33#include <linux/if_vlan.h> 34#include <linux/ethtool.h> 35#include <linux/in.h> 36#include <linux/ip.h> 37#include <linux/ipv6.h> 38#include <linux/tcp.h> 39#include <linux/rtnetlink.h> 40#include <linux/prefetch.h> 41#include <net/ip6_checksum.h> 42 43#include "cq_enet_desc.h" 44#include "vnic_dev.h" 45#include "vnic_intr.h" 46#include "vnic_stats.h" 47#include "vnic_vic.h" 48#include "enic_res.h" 49#include "enic.h" 50#include "enic_dev.h" 51#include "enic_pp.h" 52 53#define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ) 54#define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS) 55#define MAX_TSO (1 << 16) 56#define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1) 57 58#define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */ 59#define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */ 60#define PCI_DEVICE_ID_CISCO_VIC_ENET_VF 0x0071 /* enet SRIOV VF */ 61 62/* Supported devices */ 63static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = { 64 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) }, 65 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) }, 66 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) }, 67 { 0, } /* end of table */ 68}; 69 70MODULE_DESCRIPTION(DRV_DESCRIPTION); 71MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>"); 72MODULE_LICENSE("GPL"); 73MODULE_VERSION(DRV_VERSION); 74MODULE_DEVICE_TABLE(pci, enic_id_table); 75 76struct enic_stat { 77 char name[ETH_GSTRING_LEN]; 78 unsigned int offset; 79}; 80 81#define ENIC_TX_STAT(stat) \ 82 { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 } 83#define ENIC_RX_STAT(stat) \ 84 { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 } 85 86static const struct enic_stat enic_tx_stats[] = { 87 ENIC_TX_STAT(tx_frames_ok), 88 ENIC_TX_STAT(tx_unicast_frames_ok), 89 ENIC_TX_STAT(tx_multicast_frames_ok), 90 ENIC_TX_STAT(tx_broadcast_frames_ok), 91 ENIC_TX_STAT(tx_bytes_ok), 92 ENIC_TX_STAT(tx_unicast_bytes_ok), 93 ENIC_TX_STAT(tx_multicast_bytes_ok), 94 ENIC_TX_STAT(tx_broadcast_bytes_ok), 95 ENIC_TX_STAT(tx_drops), 96 ENIC_TX_STAT(tx_errors), 97 ENIC_TX_STAT(tx_tso), 98}; 99 100static const struct enic_stat enic_rx_stats[] = { 101 ENIC_RX_STAT(rx_frames_ok), 102 ENIC_RX_STAT(rx_frames_total), 103 ENIC_RX_STAT(rx_unicast_frames_ok), 104 ENIC_RX_STAT(rx_multicast_frames_ok), 105 ENIC_RX_STAT(rx_broadcast_frames_ok), 106 ENIC_RX_STAT(rx_bytes_ok), 107 ENIC_RX_STAT(rx_unicast_bytes_ok), 108 ENIC_RX_STAT(rx_multicast_bytes_ok), 109 ENIC_RX_STAT(rx_broadcast_bytes_ok), 110 ENIC_RX_STAT(rx_drop), 111 ENIC_RX_STAT(rx_no_bufs), 112 ENIC_RX_STAT(rx_errors), 113 ENIC_RX_STAT(rx_rss), 114 ENIC_RX_STAT(rx_crc_errors), 115 ENIC_RX_STAT(rx_frames_64), 116 ENIC_RX_STAT(rx_frames_127), 117 ENIC_RX_STAT(rx_frames_255), 118 ENIC_RX_STAT(rx_frames_511), 119 ENIC_RX_STAT(rx_frames_1023), 120 ENIC_RX_STAT(rx_frames_1518), 121 ENIC_RX_STAT(rx_frames_to_max), 122}; 123 124static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats); 125static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats); 126 127int enic_is_dynamic(struct enic *enic) 128{ 129 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN; 130} 131 132int enic_sriov_enabled(struct enic *enic) 133{ 134 return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0; 135} 136 137static int enic_is_sriov_vf(struct enic *enic) 138{ 139 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF; 140} 141 142int enic_is_valid_vf(struct enic *enic, int vf) 143{ 144#ifdef CONFIG_PCI_IOV 145 return vf >= 0 && vf < enic->num_vfs; 146#else 147 return 0; 148#endif 149} 150 151static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq) 152{ 153 return rq; 154} 155 156static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq) 157{ 158 return enic->rq_count + wq; 159} 160 161static inline unsigned int enic_legacy_io_intr(void) 162{ 163 return 0; 164} 165 166static inline unsigned int enic_legacy_err_intr(void) 167{ 168 return 1; 169} 170 171static inline unsigned int enic_legacy_notify_intr(void) 172{ 173 return 2; 174} 175 176static inline unsigned int enic_msix_rq_intr(struct enic *enic, unsigned int rq) 177{ 178 return enic->cq[enic_cq_rq(enic, rq)].interrupt_offset; 179} 180 181static inline unsigned int enic_msix_wq_intr(struct enic *enic, unsigned int wq) 182{ 183 return enic->cq[enic_cq_wq(enic, wq)].interrupt_offset; 184} 185 186static inline unsigned int enic_msix_err_intr(struct enic *enic) 187{ 188 return enic->rq_count + enic->wq_count; 189} 190 191static inline unsigned int enic_msix_notify_intr(struct enic *enic) 192{ 193 return enic->rq_count + enic->wq_count + 1; 194} 195 196static int enic_get_settings(struct net_device *netdev, 197 struct ethtool_cmd *ecmd) 198{ 199 struct enic *enic = netdev_priv(netdev); 200 201 ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE); 202 ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE); 203 ecmd->port = PORT_FIBRE; 204 ecmd->transceiver = XCVR_EXTERNAL; 205 206 if (netif_carrier_ok(netdev)) { 207 ethtool_cmd_speed_set(ecmd, vnic_dev_port_speed(enic->vdev)); 208 ecmd->duplex = DUPLEX_FULL; 209 } else { 210 ethtool_cmd_speed_set(ecmd, -1); 211 ecmd->duplex = -1; 212 } 213 214 ecmd->autoneg = AUTONEG_DISABLE; 215 216 return 0; 217} 218 219static void enic_get_drvinfo(struct net_device *netdev, 220 struct ethtool_drvinfo *drvinfo) 221{ 222 struct enic *enic = netdev_priv(netdev); 223 struct vnic_devcmd_fw_info *fw_info; 224 225 enic_dev_fw_info(enic, &fw_info); 226 227 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); 228 strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version)); 229 strlcpy(drvinfo->fw_version, fw_info->fw_version, 230 sizeof(drvinfo->fw_version)); 231 strlcpy(drvinfo->bus_info, pci_name(enic->pdev), 232 sizeof(drvinfo->bus_info)); 233} 234 235static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data) 236{ 237 unsigned int i; 238 239 switch (stringset) { 240 case ETH_SS_STATS: 241 for (i = 0; i < enic_n_tx_stats; i++) { 242 memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN); 243 data += ETH_GSTRING_LEN; 244 } 245 for (i = 0; i < enic_n_rx_stats; i++) { 246 memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN); 247 data += ETH_GSTRING_LEN; 248 } 249 break; 250 } 251} 252 253static int enic_get_sset_count(struct net_device *netdev, int sset) 254{ 255 switch (sset) { 256 case ETH_SS_STATS: 257 return enic_n_tx_stats + enic_n_rx_stats; 258 default: 259 return -EOPNOTSUPP; 260 } 261} 262 263static void enic_get_ethtool_stats(struct net_device *netdev, 264 struct ethtool_stats *stats, u64 *data) 265{ 266 struct enic *enic = netdev_priv(netdev); 267 struct vnic_stats *vstats; 268 unsigned int i; 269 270 enic_dev_stats_dump(enic, &vstats); 271 272 for (i = 0; i < enic_n_tx_stats; i++) 273 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset]; 274 for (i = 0; i < enic_n_rx_stats; i++) 275 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset]; 276} 277 278static u32 enic_get_msglevel(struct net_device *netdev) 279{ 280 struct enic *enic = netdev_priv(netdev); 281 return enic->msg_enable; 282} 283 284static void enic_set_msglevel(struct net_device *netdev, u32 value) 285{ 286 struct enic *enic = netdev_priv(netdev); 287 enic->msg_enable = value; 288} 289 290static int enic_get_coalesce(struct net_device *netdev, 291 struct ethtool_coalesce *ecmd) 292{ 293 struct enic *enic = netdev_priv(netdev); 294 295 ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs; 296 ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs; 297 298 return 0; 299} 300 301static int enic_set_coalesce(struct net_device *netdev, 302 struct ethtool_coalesce *ecmd) 303{ 304 struct enic *enic = netdev_priv(netdev); 305 u32 tx_coalesce_usecs; 306 u32 rx_coalesce_usecs; 307 unsigned int i, intr; 308 309 tx_coalesce_usecs = min_t(u32, ecmd->tx_coalesce_usecs, 310 vnic_dev_get_intr_coal_timer_max(enic->vdev)); 311 rx_coalesce_usecs = min_t(u32, ecmd->rx_coalesce_usecs, 312 vnic_dev_get_intr_coal_timer_max(enic->vdev)); 313 314 switch (vnic_dev_get_intr_mode(enic->vdev)) { 315 case VNIC_DEV_INTR_MODE_INTX: 316 if (tx_coalesce_usecs != rx_coalesce_usecs) 317 return -EINVAL; 318 319 intr = enic_legacy_io_intr(); 320 vnic_intr_coalescing_timer_set(&enic->intr[intr], 321 tx_coalesce_usecs); 322 break; 323 case VNIC_DEV_INTR_MODE_MSI: 324 if (tx_coalesce_usecs != rx_coalesce_usecs) 325 return -EINVAL; 326 327 vnic_intr_coalescing_timer_set(&enic->intr[0], 328 tx_coalesce_usecs); 329 break; 330 case VNIC_DEV_INTR_MODE_MSIX: 331 for (i = 0; i < enic->wq_count; i++) { 332 intr = enic_msix_wq_intr(enic, i); 333 vnic_intr_coalescing_timer_set(&enic->intr[intr], 334 tx_coalesce_usecs); 335 } 336 337 for (i = 0; i < enic->rq_count; i++) { 338 intr = enic_msix_rq_intr(enic, i); 339 vnic_intr_coalescing_timer_set(&enic->intr[intr], 340 rx_coalesce_usecs); 341 } 342 343 break; 344 default: 345 break; 346 } 347 348 enic->tx_coalesce_usecs = tx_coalesce_usecs; 349 enic->rx_coalesce_usecs = rx_coalesce_usecs; 350 351 return 0; 352} 353 354static const struct ethtool_ops enic_ethtool_ops = { 355 .get_settings = enic_get_settings, 356 .get_drvinfo = enic_get_drvinfo, 357 .get_msglevel = enic_get_msglevel, 358 .set_msglevel = enic_set_msglevel, 359 .get_link = ethtool_op_get_link, 360 .get_strings = enic_get_strings, 361 .get_sset_count = enic_get_sset_count, 362 .get_ethtool_stats = enic_get_ethtool_stats, 363 .get_coalesce = enic_get_coalesce, 364 .set_coalesce = enic_set_coalesce, 365}; 366 367static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) 368{ 369 struct enic *enic = vnic_dev_priv(wq->vdev); 370 371 if (buf->sop) 372 pci_unmap_single(enic->pdev, buf->dma_addr, 373 buf->len, PCI_DMA_TODEVICE); 374 else 375 pci_unmap_page(enic->pdev, buf->dma_addr, 376 buf->len, PCI_DMA_TODEVICE); 377 378 if (buf->os_buf) 379 dev_kfree_skb_any(buf->os_buf); 380} 381 382static void enic_wq_free_buf(struct vnic_wq *wq, 383 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque) 384{ 385 enic_free_wq_buf(wq, buf); 386} 387 388static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, 389 u8 type, u16 q_number, u16 completed_index, void *opaque) 390{ 391 struct enic *enic = vnic_dev_priv(vdev); 392 393 spin_lock(&enic->wq_lock[q_number]); 394 395 vnic_wq_service(&enic->wq[q_number], cq_desc, 396 completed_index, enic_wq_free_buf, 397 opaque); 398 399 if (netif_queue_stopped(enic->netdev) && 400 vnic_wq_desc_avail(&enic->wq[q_number]) >= 401 (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)) 402 netif_wake_queue(enic->netdev); 403 404 spin_unlock(&enic->wq_lock[q_number]); 405 406 return 0; 407} 408 409static void enic_log_q_error(struct enic *enic) 410{ 411 unsigned int i; 412 u32 error_status; 413 414 for (i = 0; i < enic->wq_count; i++) { 415 error_status = vnic_wq_error_status(&enic->wq[i]); 416 if (error_status) 417 netdev_err(enic->netdev, "WQ[%d] error_status %d\n", 418 i, error_status); 419 } 420 421 for (i = 0; i < enic->rq_count; i++) { 422 error_status = vnic_rq_error_status(&enic->rq[i]); 423 if (error_status) 424 netdev_err(enic->netdev, "RQ[%d] error_status %d\n", 425 i, error_status); 426 } 427} 428 429static void enic_msglvl_check(struct enic *enic) 430{ 431 u32 msg_enable = vnic_dev_msg_lvl(enic->vdev); 432 433 if (msg_enable != enic->msg_enable) { 434 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n", 435 enic->msg_enable, msg_enable); 436 enic->msg_enable = msg_enable; 437 } 438} 439 440static void enic_mtu_check(struct enic *enic) 441{ 442 u32 mtu = vnic_dev_mtu(enic->vdev); 443 struct net_device *netdev = enic->netdev; 444 445 if (mtu && mtu != enic->port_mtu) { 446 enic->port_mtu = mtu; 447 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { 448 mtu = max_t(int, ENIC_MIN_MTU, 449 min_t(int, ENIC_MAX_MTU, mtu)); 450 if (mtu != netdev->mtu) 451 schedule_work(&enic->change_mtu_work); 452 } else { 453 if (mtu < netdev->mtu) 454 netdev_warn(netdev, 455 "interface MTU (%d) set higher " 456 "than switch port MTU (%d)\n", 457 netdev->mtu, mtu); 458 } 459 } 460} 461 462static void enic_link_check(struct enic *enic) 463{ 464 int link_status = vnic_dev_link_status(enic->vdev); 465 int carrier_ok = netif_carrier_ok(enic->netdev); 466 467 if (link_status && !carrier_ok) { 468 netdev_info(enic->netdev, "Link UP\n"); 469 netif_carrier_on(enic->netdev); 470 } else if (!link_status && carrier_ok) { 471 netdev_info(enic->netdev, "Link DOWN\n"); 472 netif_carrier_off(enic->netdev); 473 } 474} 475 476static void enic_notify_check(struct enic *enic) 477{ 478 enic_msglvl_check(enic); 479 enic_mtu_check(enic); 480 enic_link_check(enic); 481} 482 483#define ENIC_TEST_INTR(pba, i) (pba & (1 << i)) 484 485static irqreturn_t enic_isr_legacy(int irq, void *data) 486{ 487 struct net_device *netdev = data; 488 struct enic *enic = netdev_priv(netdev); 489 unsigned int io_intr = enic_legacy_io_intr(); 490 unsigned int err_intr = enic_legacy_err_intr(); 491 unsigned int notify_intr = enic_legacy_notify_intr(); 492 u32 pba; 493 494 vnic_intr_mask(&enic->intr[io_intr]); 495 496 pba = vnic_intr_legacy_pba(enic->legacy_pba); 497 if (!pba) { 498 vnic_intr_unmask(&enic->intr[io_intr]); 499 return IRQ_NONE; /* not our interrupt */ 500 } 501 502 if (ENIC_TEST_INTR(pba, notify_intr)) { 503 vnic_intr_return_all_credits(&enic->intr[notify_intr]); 504 enic_notify_check(enic); 505 } 506 507 if (ENIC_TEST_INTR(pba, err_intr)) { 508 vnic_intr_return_all_credits(&enic->intr[err_intr]); 509 enic_log_q_error(enic); 510 /* schedule recovery from WQ/RQ error */ 511 schedule_work(&enic->reset); 512 return IRQ_HANDLED; 513 } 514 515 if (ENIC_TEST_INTR(pba, io_intr)) { 516 if (napi_schedule_prep(&enic->napi[0])) 517 __napi_schedule(&enic->napi[0]); 518 } else { 519 vnic_intr_unmask(&enic->intr[io_intr]); 520 } 521 522 return IRQ_HANDLED; 523} 524 525static irqreturn_t enic_isr_msi(int irq, void *data) 526{ 527 struct enic *enic = data; 528 529 /* With MSI, there is no sharing of interrupts, so this is 530 * our interrupt and there is no need to ack it. The device 531 * is not providing per-vector masking, so the OS will not 532 * write to PCI config space to mask/unmask the interrupt. 533 * We're using mask_on_assertion for MSI, so the device 534 * automatically masks the interrupt when the interrupt is 535 * generated. Later, when exiting polling, the interrupt 536 * will be unmasked (see enic_poll). 537 * 538 * Also, the device uses the same PCIe Traffic Class (TC) 539 * for Memory Write data and MSI, so there are no ordering 540 * issues; the MSI will always arrive at the Root Complex 541 * _after_ corresponding Memory Writes (i.e. descriptor 542 * writes). 543 */ 544 545 napi_schedule(&enic->napi[0]); 546 547 return IRQ_HANDLED; 548} 549 550static irqreturn_t enic_isr_msix_rq(int irq, void *data) 551{ 552 struct napi_struct *napi = data; 553 554 /* schedule NAPI polling for RQ cleanup */ 555 napi_schedule(napi); 556 557 return IRQ_HANDLED; 558} 559 560static irqreturn_t enic_isr_msix_wq(int irq, void *data) 561{ 562 struct enic *enic = data; 563 unsigned int cq = enic_cq_wq(enic, 0); 564 unsigned int intr = enic_msix_wq_intr(enic, 0); 565 unsigned int wq_work_to_do = -1; /* no limit */ 566 unsigned int wq_work_done; 567 568 wq_work_done = vnic_cq_service(&enic->cq[cq], 569 wq_work_to_do, enic_wq_service, NULL); 570 571 vnic_intr_return_credits(&enic->intr[intr], 572 wq_work_done, 573 1 /* unmask intr */, 574 1 /* reset intr timer */); 575 576 return IRQ_HANDLED; 577} 578 579static irqreturn_t enic_isr_msix_err(int irq, void *data) 580{ 581 struct enic *enic = data; 582 unsigned int intr = enic_msix_err_intr(enic); 583 584 vnic_intr_return_all_credits(&enic->intr[intr]); 585 586 enic_log_q_error(enic); 587 588 /* schedule recovery from WQ/RQ error */ 589 schedule_work(&enic->reset); 590 591 return IRQ_HANDLED; 592} 593 594static irqreturn_t enic_isr_msix_notify(int irq, void *data) 595{ 596 struct enic *enic = data; 597 unsigned int intr = enic_msix_notify_intr(enic); 598 599 vnic_intr_return_all_credits(&enic->intr[intr]); 600 enic_notify_check(enic); 601 602 return IRQ_HANDLED; 603} 604 605static inline void enic_queue_wq_skb_cont(struct enic *enic, 606 struct vnic_wq *wq, struct sk_buff *skb, 607 unsigned int len_left, int loopback) 608{ 609 const skb_frag_t *frag; 610 611 /* Queue additional data fragments */ 612 for (frag = skb_shinfo(skb)->frags; len_left; frag++) { 613 len_left -= skb_frag_size(frag); 614 enic_queue_wq_desc_cont(wq, skb, 615 skb_frag_dma_map(&enic->pdev->dev, 616 frag, 0, skb_frag_size(frag), 617 DMA_TO_DEVICE), 618 skb_frag_size(frag), 619 (len_left == 0), /* EOP? */ 620 loopback); 621 } 622} 623 624static inline void enic_queue_wq_skb_vlan(struct enic *enic, 625 struct vnic_wq *wq, struct sk_buff *skb, 626 int vlan_tag_insert, unsigned int vlan_tag, int loopback) 627{ 628 unsigned int head_len = skb_headlen(skb); 629 unsigned int len_left = skb->len - head_len; 630 int eop = (len_left == 0); 631 632 /* Queue the main skb fragment. The fragments are no larger 633 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less 634 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor 635 * per fragment is queued. 636 */ 637 enic_queue_wq_desc(wq, skb, 638 pci_map_single(enic->pdev, skb->data, 639 head_len, PCI_DMA_TODEVICE), 640 head_len, 641 vlan_tag_insert, vlan_tag, 642 eop, loopback); 643 644 if (!eop) 645 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 646} 647 648static inline void enic_queue_wq_skb_csum_l4(struct enic *enic, 649 struct vnic_wq *wq, struct sk_buff *skb, 650 int vlan_tag_insert, unsigned int vlan_tag, int loopback) 651{ 652 unsigned int head_len = skb_headlen(skb); 653 unsigned int len_left = skb->len - head_len; 654 unsigned int hdr_len = skb_checksum_start_offset(skb); 655 unsigned int csum_offset = hdr_len + skb->csum_offset; 656 int eop = (len_left == 0); 657 658 /* Queue the main skb fragment. The fragments are no larger 659 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less 660 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor 661 * per fragment is queued. 662 */ 663 enic_queue_wq_desc_csum_l4(wq, skb, 664 pci_map_single(enic->pdev, skb->data, 665 head_len, PCI_DMA_TODEVICE), 666 head_len, 667 csum_offset, 668 hdr_len, 669 vlan_tag_insert, vlan_tag, 670 eop, loopback); 671 672 if (!eop) 673 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 674} 675 676static inline void enic_queue_wq_skb_tso(struct enic *enic, 677 struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss, 678 int vlan_tag_insert, unsigned int vlan_tag, int loopback) 679{ 680 unsigned int frag_len_left = skb_headlen(skb); 681 unsigned int len_left = skb->len - frag_len_left; 682 unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 683 int eop = (len_left == 0); 684 unsigned int len; 685 dma_addr_t dma_addr; 686 unsigned int offset = 0; 687 skb_frag_t *frag; 688 689 /* Preload TCP csum field with IP pseudo hdr calculated 690 * with IP length set to zero. HW will later add in length 691 * to each TCP segment resulting from the TSO. 692 */ 693 694 if (skb->protocol == cpu_to_be16(ETH_P_IP)) { 695 ip_hdr(skb)->check = 0; 696 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr, 697 ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); 698 } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) { 699 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 700 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); 701 } 702 703 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors 704 * for the main skb fragment 705 */ 706 while (frag_len_left) { 707 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN); 708 dma_addr = pci_map_single(enic->pdev, skb->data + offset, 709 len, PCI_DMA_TODEVICE); 710 enic_queue_wq_desc_tso(wq, skb, 711 dma_addr, 712 len, 713 mss, hdr_len, 714 vlan_tag_insert, vlan_tag, 715 eop && (len == frag_len_left), loopback); 716 frag_len_left -= len; 717 offset += len; 718 } 719 720 if (eop) 721 return; 722 723 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors 724 * for additional data fragments 725 */ 726 for (frag = skb_shinfo(skb)->frags; len_left; frag++) { 727 len_left -= skb_frag_size(frag); 728 frag_len_left = skb_frag_size(frag); 729 offset = 0; 730 731 while (frag_len_left) { 732 len = min(frag_len_left, 733 (unsigned int)WQ_ENET_MAX_DESC_LEN); 734 dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 735 offset, len, 736 DMA_TO_DEVICE); 737 enic_queue_wq_desc_cont(wq, skb, 738 dma_addr, 739 len, 740 (len_left == 0) && 741 (len == frag_len_left), /* EOP? */ 742 loopback); 743 frag_len_left -= len; 744 offset += len; 745 } 746 } 747} 748 749static inline void enic_queue_wq_skb(struct enic *enic, 750 struct vnic_wq *wq, struct sk_buff *skb) 751{ 752 unsigned int mss = skb_shinfo(skb)->gso_size; 753 unsigned int vlan_tag = 0; 754 int vlan_tag_insert = 0; 755 int loopback = 0; 756 757 if (vlan_tx_tag_present(skb)) { 758 /* VLAN tag from trunking driver */ 759 vlan_tag_insert = 1; 760 vlan_tag = vlan_tx_tag_get(skb); 761 } else if (enic->loop_enable) { 762 vlan_tag = enic->loop_tag; 763 loopback = 1; 764 } 765 766 if (mss) 767 enic_queue_wq_skb_tso(enic, wq, skb, mss, 768 vlan_tag_insert, vlan_tag, loopback); 769 else if (skb->ip_summed == CHECKSUM_PARTIAL) 770 enic_queue_wq_skb_csum_l4(enic, wq, skb, 771 vlan_tag_insert, vlan_tag, loopback); 772 else 773 enic_queue_wq_skb_vlan(enic, wq, skb, 774 vlan_tag_insert, vlan_tag, loopback); 775} 776 777/* netif_tx_lock held, process context with BHs disabled, or BH */ 778static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb, 779 struct net_device *netdev) 780{ 781 struct enic *enic = netdev_priv(netdev); 782 struct vnic_wq *wq = &enic->wq[0]; 783 unsigned long flags; 784 785 if (skb->len <= 0) { 786 dev_kfree_skb(skb); 787 return NETDEV_TX_OK; 788 } 789 790 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs, 791 * which is very likely. In the off chance it's going to take 792 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb. 793 */ 794 795 if (skb_shinfo(skb)->gso_size == 0 && 796 skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC && 797 skb_linearize(skb)) { 798 dev_kfree_skb(skb); 799 return NETDEV_TX_OK; 800 } 801 802 spin_lock_irqsave(&enic->wq_lock[0], flags); 803 804 if (vnic_wq_desc_avail(wq) < 805 skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) { 806 netif_stop_queue(netdev); 807 /* This is a hard error, log it */ 808 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n"); 809 spin_unlock_irqrestore(&enic->wq_lock[0], flags); 810 return NETDEV_TX_BUSY; 811 } 812 813 enic_queue_wq_skb(enic, wq, skb); 814 815 if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS) 816 netif_stop_queue(netdev); 817 818 spin_unlock_irqrestore(&enic->wq_lock[0], flags); 819 820 return NETDEV_TX_OK; 821} 822 823/* dev_base_lock rwlock held, nominally process context */ 824static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev, 825 struct rtnl_link_stats64 *net_stats) 826{ 827 struct enic *enic = netdev_priv(netdev); 828 struct vnic_stats *stats; 829 830 enic_dev_stats_dump(enic, &stats); 831 832 net_stats->tx_packets = stats->tx.tx_frames_ok; 833 net_stats->tx_bytes = stats->tx.tx_bytes_ok; 834 net_stats->tx_errors = stats->tx.tx_errors; 835 net_stats->tx_dropped = stats->tx.tx_drops; 836 837 net_stats->rx_packets = stats->rx.rx_frames_ok; 838 net_stats->rx_bytes = stats->rx.rx_bytes_ok; 839 net_stats->rx_errors = stats->rx.rx_errors; 840 net_stats->multicast = stats->rx.rx_multicast_frames_ok; 841 net_stats->rx_over_errors = enic->rq_truncated_pkts; 842 net_stats->rx_crc_errors = enic->rq_bad_fcs; 843 net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop; 844 845 return net_stats; 846} 847 848void enic_reset_addr_lists(struct enic *enic) 849{ 850 enic->mc_count = 0; 851 enic->uc_count = 0; 852 enic->flags = 0; 853} 854 855static int enic_set_mac_addr(struct net_device *netdev, char *addr) 856{ 857 struct enic *enic = netdev_priv(netdev); 858 859 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { 860 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr)) 861 return -EADDRNOTAVAIL; 862 } else { 863 if (!is_valid_ether_addr(addr)) 864 return -EADDRNOTAVAIL; 865 } 866 867 memcpy(netdev->dev_addr, addr, netdev->addr_len); 868 netdev->addr_assign_type &= ~NET_ADDR_RANDOM; 869 870 return 0; 871} 872 873static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p) 874{ 875 struct enic *enic = netdev_priv(netdev); 876 struct sockaddr *saddr = p; 877 char *addr = saddr->sa_data; 878 int err; 879 880 if (netif_running(enic->netdev)) { 881 err = enic_dev_del_station_addr(enic); 882 if (err) 883 return err; 884 } 885 886 err = enic_set_mac_addr(netdev, addr); 887 if (err) 888 return err; 889 890 if (netif_running(enic->netdev)) { 891 err = enic_dev_add_station_addr(enic); 892 if (err) 893 return err; 894 } 895 896 return err; 897} 898 899static int enic_set_mac_address(struct net_device *netdev, void *p) 900{ 901 struct sockaddr *saddr = p; 902 char *addr = saddr->sa_data; 903 struct enic *enic = netdev_priv(netdev); 904 int err; 905 906 err = enic_dev_del_station_addr(enic); 907 if (err) 908 return err; 909 910 err = enic_set_mac_addr(netdev, addr); 911 if (err) 912 return err; 913 914 return enic_dev_add_station_addr(enic); 915} 916 917static void enic_update_multicast_addr_list(struct enic *enic) 918{ 919 struct net_device *netdev = enic->netdev; 920 struct netdev_hw_addr *ha; 921 unsigned int mc_count = netdev_mc_count(netdev); 922 u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN]; 923 unsigned int i, j; 924 925 if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) { 926 netdev_warn(netdev, "Registering only %d out of %d " 927 "multicast addresses\n", 928 ENIC_MULTICAST_PERFECT_FILTERS, mc_count); 929 mc_count = ENIC_MULTICAST_PERFECT_FILTERS; 930 } 931 932 /* Is there an easier way? Trying to minimize to 933 * calls to add/del multicast addrs. We keep the 934 * addrs from the last call in enic->mc_addr and 935 * look for changes to add/del. 936 */ 937 938 i = 0; 939 netdev_for_each_mc_addr(ha, netdev) { 940 if (i == mc_count) 941 break; 942 memcpy(mc_addr[i++], ha->addr, ETH_ALEN); 943 } 944 945 for (i = 0; i < enic->mc_count; i++) { 946 for (j = 0; j < mc_count; j++) 947 if (compare_ether_addr(enic->mc_addr[i], 948 mc_addr[j]) == 0) 949 break; 950 if (j == mc_count) 951 enic_dev_del_addr(enic, enic->mc_addr[i]); 952 } 953 954 for (i = 0; i < mc_count; i++) { 955 for (j = 0; j < enic->mc_count; j++) 956 if (compare_ether_addr(mc_addr[i], 957 enic->mc_addr[j]) == 0) 958 break; 959 if (j == enic->mc_count) 960 enic_dev_add_addr(enic, mc_addr[i]); 961 } 962 963 /* Save the list to compare against next time 964 */ 965 966 for (i = 0; i < mc_count; i++) 967 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN); 968 969 enic->mc_count = mc_count; 970} 971 972static void enic_update_unicast_addr_list(struct enic *enic) 973{ 974 struct net_device *netdev = enic->netdev; 975 struct netdev_hw_addr *ha; 976 unsigned int uc_count = netdev_uc_count(netdev); 977 u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN]; 978 unsigned int i, j; 979 980 if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) { 981 netdev_warn(netdev, "Registering only %d out of %d " 982 "unicast addresses\n", 983 ENIC_UNICAST_PERFECT_FILTERS, uc_count); 984 uc_count = ENIC_UNICAST_PERFECT_FILTERS; 985 } 986 987 /* Is there an easier way? Trying to minimize to 988 * calls to add/del unicast addrs. We keep the 989 * addrs from the last call in enic->uc_addr and 990 * look for changes to add/del. 991 */ 992 993 i = 0; 994 netdev_for_each_uc_addr(ha, netdev) { 995 if (i == uc_count) 996 break; 997 memcpy(uc_addr[i++], ha->addr, ETH_ALEN); 998 } 999 1000 for (i = 0; i < enic->uc_count; i++) { 1001 for (j = 0; j < uc_count; j++) 1002 if (compare_ether_addr(enic->uc_addr[i], 1003 uc_addr[j]) == 0) 1004 break; 1005 if (j == uc_count) 1006 enic_dev_del_addr(enic, enic->uc_addr[i]); 1007 } 1008 1009 for (i = 0; i < uc_count; i++) { 1010 for (j = 0; j < enic->uc_count; j++) 1011 if (compare_ether_addr(uc_addr[i], 1012 enic->uc_addr[j]) == 0) 1013 break; 1014 if (j == enic->uc_count) 1015 enic_dev_add_addr(enic, uc_addr[i]); 1016 } 1017 1018 /* Save the list to compare against next time 1019 */ 1020 1021 for (i = 0; i < uc_count; i++) 1022 memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN); 1023 1024 enic->uc_count = uc_count; 1025} 1026 1027/* netif_tx_lock held, BHs disabled */ 1028static void enic_set_rx_mode(struct net_device *netdev) 1029{ 1030 struct enic *enic = netdev_priv(netdev); 1031 int directed = 1; 1032 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0; 1033 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0; 1034 int promisc = (netdev->flags & IFF_PROMISC) || 1035 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS; 1036 int allmulti = (netdev->flags & IFF_ALLMULTI) || 1037 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS; 1038 unsigned int flags = netdev->flags | 1039 (allmulti ? IFF_ALLMULTI : 0) | 1040 (promisc ? IFF_PROMISC : 0); 1041 1042 if (enic->flags != flags) { 1043 enic->flags = flags; 1044 enic_dev_packet_filter(enic, directed, 1045 multicast, broadcast, promisc, allmulti); 1046 } 1047 1048 if (!promisc) { 1049 enic_update_unicast_addr_list(enic); 1050 if (!allmulti) 1051 enic_update_multicast_addr_list(enic); 1052 } 1053} 1054 1055/* netif_tx_lock held, BHs disabled */ 1056static void enic_tx_timeout(struct net_device *netdev) 1057{ 1058 struct enic *enic = netdev_priv(netdev); 1059 schedule_work(&enic->reset); 1060} 1061 1062static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac) 1063{ 1064 struct enic *enic = netdev_priv(netdev); 1065 struct enic_port_profile *pp; 1066 int err; 1067 1068 ENIC_PP_BY_INDEX(enic, vf, pp, &err); 1069 if (err) 1070 return err; 1071 1072 if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) { 1073 if (vf == PORT_SELF_VF) { 1074 memcpy(pp->vf_mac, mac, ETH_ALEN); 1075 return 0; 1076 } else { 1077 /* 1078 * For sriov vf's set the mac in hw 1079 */ 1080 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 1081 vnic_dev_set_mac_addr, mac); 1082 return enic_dev_status_to_errno(err); 1083 } 1084 } else 1085 return -EINVAL; 1086} 1087 1088static int enic_set_vf_port(struct net_device *netdev, int vf, 1089 struct nlattr *port[]) 1090{ 1091 struct enic *enic = netdev_priv(netdev); 1092 struct enic_port_profile prev_pp; 1093 struct enic_port_profile *pp; 1094 int err = 0, restore_pp = 1; 1095 1096 ENIC_PP_BY_INDEX(enic, vf, pp, &err); 1097 if (err) 1098 return err; 1099 1100 if (!port[IFLA_PORT_REQUEST]) 1101 return -EOPNOTSUPP; 1102 1103 memcpy(&prev_pp, pp, sizeof(*enic->pp)); 1104 memset(pp, 0, sizeof(*enic->pp)); 1105 1106 pp->set |= ENIC_SET_REQUEST; 1107 pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]); 1108 1109 if (port[IFLA_PORT_PROFILE]) { 1110 pp->set |= ENIC_SET_NAME; 1111 memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]), 1112 PORT_PROFILE_MAX); 1113 } 1114 1115 if (port[IFLA_PORT_INSTANCE_UUID]) { 1116 pp->set |= ENIC_SET_INSTANCE; 1117 memcpy(pp->instance_uuid, 1118 nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX); 1119 } 1120 1121 if (port[IFLA_PORT_HOST_UUID]) { 1122 pp->set |= ENIC_SET_HOST; 1123 memcpy(pp->host_uuid, 1124 nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX); 1125 } 1126 1127 if (vf == PORT_SELF_VF) { 1128 /* Special case handling: mac came from IFLA_VF_MAC */ 1129 if (!is_zero_ether_addr(prev_pp.vf_mac)) 1130 memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN); 1131 1132 if (is_zero_ether_addr(netdev->dev_addr)) 1133 eth_hw_addr_random(netdev); 1134 } else { 1135 /* SR-IOV VF: get mac from adapter */ 1136 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 1137 vnic_dev_get_mac_addr, pp->mac_addr); 1138 if (err) { 1139 netdev_err(netdev, "Error getting mac for vf %d\n", vf); 1140 memcpy(pp, &prev_pp, sizeof(*pp)); 1141 return enic_dev_status_to_errno(err); 1142 } 1143 } 1144 1145 err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp); 1146 if (err) { 1147 if (restore_pp) { 1148 /* Things are still the way they were: Implicit 1149 * DISASSOCIATE failed 1150 */ 1151 memcpy(pp, &prev_pp, sizeof(*pp)); 1152 } else { 1153 memset(pp, 0, sizeof(*pp)); 1154 if (vf == PORT_SELF_VF) 1155 memset(netdev->dev_addr, 0, ETH_ALEN); 1156 } 1157 } else { 1158 /* Set flag to indicate that the port assoc/disassoc 1159 * request has been sent out to fw 1160 */ 1161 pp->set |= ENIC_PORT_REQUEST_APPLIED; 1162 1163 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */ 1164 if (pp->request == PORT_REQUEST_DISASSOCIATE) { 1165 memset(pp->mac_addr, 0, ETH_ALEN); 1166 if (vf == PORT_SELF_VF) 1167 memset(netdev->dev_addr, 0, ETH_ALEN); 1168 } 1169 } 1170 1171 if (vf == PORT_SELF_VF) 1172 memset(pp->vf_mac, 0, ETH_ALEN); 1173 1174 return err; 1175} 1176 1177static int enic_get_vf_port(struct net_device *netdev, int vf, 1178 struct sk_buff *skb) 1179{ 1180 struct enic *enic = netdev_priv(netdev); 1181 u16 response = PORT_PROFILE_RESPONSE_SUCCESS; 1182 struct enic_port_profile *pp; 1183 int err; 1184 1185 ENIC_PP_BY_INDEX(enic, vf, pp, &err); 1186 if (err) 1187 return err; 1188 1189 if (!(pp->set & ENIC_PORT_REQUEST_APPLIED)) 1190 return -ENODATA; 1191 1192 err = enic_process_get_pp_request(enic, vf, pp->request, &response); 1193 if (err) 1194 return err; 1195 1196 NLA_PUT_U16(skb, IFLA_PORT_REQUEST, pp->request); 1197 NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response); 1198 if (pp->set & ENIC_SET_NAME) 1199 NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, 1200 pp->name); 1201 if (pp->set & ENIC_SET_INSTANCE) 1202 NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX, 1203 pp->instance_uuid); 1204 if (pp->set & ENIC_SET_HOST) 1205 NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, 1206 pp->host_uuid); 1207 1208 return 0; 1209 1210nla_put_failure: 1211 return -EMSGSIZE; 1212} 1213 1214static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) 1215{ 1216 struct enic *enic = vnic_dev_priv(rq->vdev); 1217 1218 if (!buf->os_buf) 1219 return; 1220 1221 pci_unmap_single(enic->pdev, buf->dma_addr, 1222 buf->len, PCI_DMA_FROMDEVICE); 1223 dev_kfree_skb_any(buf->os_buf); 1224} 1225 1226static int enic_rq_alloc_buf(struct vnic_rq *rq) 1227{ 1228 struct enic *enic = vnic_dev_priv(rq->vdev); 1229 struct net_device *netdev = enic->netdev; 1230 struct sk_buff *skb; 1231 unsigned int len = netdev->mtu + VLAN_ETH_HLEN; 1232 unsigned int os_buf_index = 0; 1233 dma_addr_t dma_addr; 1234 1235 skb = netdev_alloc_skb_ip_align(netdev, len); 1236 if (!skb) 1237 return -ENOMEM; 1238 1239 dma_addr = pci_map_single(enic->pdev, skb->data, 1240 len, PCI_DMA_FROMDEVICE); 1241 1242 enic_queue_rq_desc(rq, skb, os_buf_index, 1243 dma_addr, len); 1244 1245 return 0; 1246} 1247 1248static void enic_rq_indicate_buf(struct vnic_rq *rq, 1249 struct cq_desc *cq_desc, struct vnic_rq_buf *buf, 1250 int skipped, void *opaque) 1251{ 1252 struct enic *enic = vnic_dev_priv(rq->vdev); 1253 struct net_device *netdev = enic->netdev; 1254 struct sk_buff *skb; 1255 1256 u8 type, color, eop, sop, ingress_port, vlan_stripped; 1257 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof; 1258 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; 1259 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc; 1260 u8 packet_error; 1261 u16 q_number, completed_index, bytes_written, vlan_tci, checksum; 1262 u32 rss_hash; 1263 1264 if (skipped) 1265 return; 1266 1267 skb = buf->os_buf; 1268 prefetch(skb->data - NET_IP_ALIGN); 1269 pci_unmap_single(enic->pdev, buf->dma_addr, 1270 buf->len, PCI_DMA_FROMDEVICE); 1271 1272 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, 1273 &type, &color, &q_number, &completed_index, 1274 &ingress_port, &fcoe, &eop, &sop, &rss_type, 1275 &csum_not_calc, &rss_hash, &bytes_written, 1276 &packet_error, &vlan_stripped, &vlan_tci, &checksum, 1277 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error, 1278 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp, 1279 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment, 1280 &fcs_ok); 1281 1282 if (packet_error) { 1283 1284 if (!fcs_ok) { 1285 if (bytes_written > 0) 1286 enic->rq_bad_fcs++; 1287 else if (bytes_written == 0) 1288 enic->rq_truncated_pkts++; 1289 } 1290 1291 dev_kfree_skb_any(skb); 1292 1293 return; 1294 } 1295 1296 if (eop && bytes_written > 0) { 1297 1298 /* Good receive 1299 */ 1300 1301 skb_put(skb, bytes_written); 1302 skb->protocol = eth_type_trans(skb, netdev); 1303 1304 if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc) { 1305 skb->csum = htons(checksum); 1306 skb->ip_summed = CHECKSUM_COMPLETE; 1307 } 1308 1309 skb->dev = netdev; 1310 1311 if (vlan_stripped) 1312 __vlan_hwaccel_put_tag(skb, vlan_tci); 1313 1314 if (netdev->features & NETIF_F_GRO) 1315 napi_gro_receive(&enic->napi[q_number], skb); 1316 else 1317 netif_receive_skb(skb); 1318 } else { 1319 1320 /* Buffer overflow 1321 */ 1322 1323 dev_kfree_skb_any(skb); 1324 } 1325} 1326 1327static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, 1328 u8 type, u16 q_number, u16 completed_index, void *opaque) 1329{ 1330 struct enic *enic = vnic_dev_priv(vdev); 1331 1332 vnic_rq_service(&enic->rq[q_number], cq_desc, 1333 completed_index, VNIC_RQ_RETURN_DESC, 1334 enic_rq_indicate_buf, opaque); 1335 1336 return 0; 1337} 1338 1339static int enic_poll(struct napi_struct *napi, int budget) 1340{ 1341 struct net_device *netdev = napi->dev; 1342 struct enic *enic = netdev_priv(netdev); 1343 unsigned int cq_rq = enic_cq_rq(enic, 0); 1344 unsigned int cq_wq = enic_cq_wq(enic, 0); 1345 unsigned int intr = enic_legacy_io_intr(); 1346 unsigned int rq_work_to_do = budget; 1347 unsigned int wq_work_to_do = -1; /* no limit */ 1348 unsigned int work_done, rq_work_done, wq_work_done; 1349 int err; 1350 1351 /* Service RQ (first) and WQ 1352 */ 1353 1354 rq_work_done = vnic_cq_service(&enic->cq[cq_rq], 1355 rq_work_to_do, enic_rq_service, NULL); 1356 1357 wq_work_done = vnic_cq_service(&enic->cq[cq_wq], 1358 wq_work_to_do, enic_wq_service, NULL); 1359 1360 /* Accumulate intr event credits for this polling 1361 * cycle. An intr event is the completion of a 1362 * a WQ or RQ packet. 1363 */ 1364 1365 work_done = rq_work_done + wq_work_done; 1366 1367 if (work_done > 0) 1368 vnic_intr_return_credits(&enic->intr[intr], 1369 work_done, 1370 0 /* don't unmask intr */, 1371 0 /* don't reset intr timer */); 1372 1373 err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); 1374 1375 /* Buffer allocation failed. Stay in polling 1376 * mode so we can try to fill the ring again. 1377 */ 1378 1379 if (err) 1380 rq_work_done = rq_work_to_do; 1381 1382 if (rq_work_done < rq_work_to_do) { 1383 1384 /* Some work done, but not enough to stay in polling, 1385 * exit polling 1386 */ 1387 1388 napi_complete(napi); 1389 vnic_intr_unmask(&enic->intr[intr]); 1390 } 1391 1392 return rq_work_done; 1393} 1394 1395static int enic_poll_msix(struct napi_struct *napi, int budget) 1396{ 1397 struct net_device *netdev = napi->dev; 1398 struct enic *enic = netdev_priv(netdev); 1399 unsigned int rq = (napi - &enic->napi[0]); 1400 unsigned int cq = enic_cq_rq(enic, rq); 1401 unsigned int intr = enic_msix_rq_intr(enic, rq); 1402 unsigned int work_to_do = budget; 1403 unsigned int work_done; 1404 int err; 1405 1406 /* Service RQ 1407 */ 1408 1409 work_done = vnic_cq_service(&enic->cq[cq], 1410 work_to_do, enic_rq_service, NULL); 1411 1412 /* Return intr event credits for this polling 1413 * cycle. An intr event is the completion of a 1414 * RQ packet. 1415 */ 1416 1417 if (work_done > 0) 1418 vnic_intr_return_credits(&enic->intr[intr], 1419 work_done, 1420 0 /* don't unmask intr */, 1421 0 /* don't reset intr timer */); 1422 1423 err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf); 1424 1425 /* Buffer allocation failed. Stay in polling mode 1426 * so we can try to fill the ring again. 1427 */ 1428 1429 if (err) 1430 work_done = work_to_do; 1431 1432 if (work_done < work_to_do) { 1433 1434 /* Some work done, but not enough to stay in polling, 1435 * exit polling 1436 */ 1437 1438 napi_complete(napi); 1439 vnic_intr_unmask(&enic->intr[intr]); 1440 } 1441 1442 return work_done; 1443} 1444 1445static void enic_notify_timer(unsigned long data) 1446{ 1447 struct enic *enic = (struct enic *)data; 1448 1449 enic_notify_check(enic); 1450 1451 mod_timer(&enic->notify_timer, 1452 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD)); 1453} 1454 1455static void enic_free_intr(struct enic *enic) 1456{ 1457 struct net_device *netdev = enic->netdev; 1458 unsigned int i; 1459 1460 switch (vnic_dev_get_intr_mode(enic->vdev)) { 1461 case VNIC_DEV_INTR_MODE_INTX: 1462 free_irq(enic->pdev->irq, netdev); 1463 break; 1464 case VNIC_DEV_INTR_MODE_MSI: 1465 free_irq(enic->pdev->irq, enic); 1466 break; 1467 case VNIC_DEV_INTR_MODE_MSIX: 1468 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) 1469 if (enic->msix[i].requested) 1470 free_irq(enic->msix_entry[i].vector, 1471 enic->msix[i].devid); 1472 break; 1473 default: 1474 break; 1475 } 1476} 1477 1478static int enic_request_intr(struct enic *enic) 1479{ 1480 struct net_device *netdev = enic->netdev; 1481 unsigned int i, intr; 1482 int err = 0; 1483 1484 switch (vnic_dev_get_intr_mode(enic->vdev)) { 1485 1486 case VNIC_DEV_INTR_MODE_INTX: 1487 1488 err = request_irq(enic->pdev->irq, enic_isr_legacy, 1489 IRQF_SHARED, netdev->name, netdev); 1490 break; 1491 1492 case VNIC_DEV_INTR_MODE_MSI: 1493 1494 err = request_irq(enic->pdev->irq, enic_isr_msi, 1495 0, netdev->name, enic); 1496 break; 1497 1498 case VNIC_DEV_INTR_MODE_MSIX: 1499 1500 for (i = 0; i < enic->rq_count; i++) { 1501 intr = enic_msix_rq_intr(enic, i); 1502 sprintf(enic->msix[intr].devname, 1503 "%.11s-rx-%d", netdev->name, i); 1504 enic->msix[intr].isr = enic_isr_msix_rq; 1505 enic->msix[intr].devid = &enic->napi[i]; 1506 } 1507 1508 for (i = 0; i < enic->wq_count; i++) { 1509 intr = enic_msix_wq_intr(enic, i); 1510 sprintf(enic->msix[intr].devname, 1511 "%.11s-tx-%d", netdev->name, i); 1512 enic->msix[intr].isr = enic_isr_msix_wq; 1513 enic->msix[intr].devid = enic; 1514 } 1515 1516 intr = enic_msix_err_intr(enic); 1517 sprintf(enic->msix[intr].devname, 1518 "%.11s-err", netdev->name); 1519 enic->msix[intr].isr = enic_isr_msix_err; 1520 enic->msix[intr].devid = enic; 1521 1522 intr = enic_msix_notify_intr(enic); 1523 sprintf(enic->msix[intr].devname, 1524 "%.11s-notify", netdev->name); 1525 enic->msix[intr].isr = enic_isr_msix_notify; 1526 enic->msix[intr].devid = enic; 1527 1528 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) 1529 enic->msix[i].requested = 0; 1530 1531 for (i = 0; i < enic->intr_count; i++) { 1532 err = request_irq(enic->msix_entry[i].vector, 1533 enic->msix[i].isr, 0, 1534 enic->msix[i].devname, 1535 enic->msix[i].devid); 1536 if (err) { 1537 enic_free_intr(enic); 1538 break; 1539 } 1540 enic->msix[i].requested = 1; 1541 } 1542 1543 break; 1544 1545 default: 1546 break; 1547 } 1548 1549 return err; 1550} 1551 1552static void enic_synchronize_irqs(struct enic *enic) 1553{ 1554 unsigned int i; 1555 1556 switch (vnic_dev_get_intr_mode(enic->vdev)) { 1557 case VNIC_DEV_INTR_MODE_INTX: 1558 case VNIC_DEV_INTR_MODE_MSI: 1559 synchronize_irq(enic->pdev->irq); 1560 break; 1561 case VNIC_DEV_INTR_MODE_MSIX: 1562 for (i = 0; i < enic->intr_count; i++) 1563 synchronize_irq(enic->msix_entry[i].vector); 1564 break; 1565 default: 1566 break; 1567 } 1568} 1569 1570static int enic_dev_notify_set(struct enic *enic) 1571{ 1572 int err; 1573 1574 spin_lock(&enic->devcmd_lock); 1575 switch (vnic_dev_get_intr_mode(enic->vdev)) { 1576 case VNIC_DEV_INTR_MODE_INTX: 1577 err = vnic_dev_notify_set(enic->vdev, 1578 enic_legacy_notify_intr()); 1579 break; 1580 case VNIC_DEV_INTR_MODE_MSIX: 1581 err = vnic_dev_notify_set(enic->vdev, 1582 enic_msix_notify_intr(enic)); 1583 break; 1584 default: 1585 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */); 1586 break; 1587 } 1588 spin_unlock(&enic->devcmd_lock); 1589 1590 return err; 1591} 1592 1593static void enic_notify_timer_start(struct enic *enic) 1594{ 1595 switch (vnic_dev_get_intr_mode(enic->vdev)) { 1596 case VNIC_DEV_INTR_MODE_MSI: 1597 mod_timer(&enic->notify_timer, jiffies); 1598 break; 1599 default: 1600 /* Using intr for notification for INTx/MSI-X */ 1601 break; 1602 } 1603} 1604 1605/* rtnl lock is held, process context */ 1606static int enic_open(struct net_device *netdev) 1607{ 1608 struct enic *enic = netdev_priv(netdev); 1609 unsigned int i; 1610 int err; 1611 1612 err = enic_request_intr(enic); 1613 if (err) { 1614 netdev_err(netdev, "Unable to request irq.\n"); 1615 return err; 1616 } 1617 1618 err = enic_dev_notify_set(enic); 1619 if (err) { 1620 netdev_err(netdev, 1621 "Failed to alloc notify buffer, aborting.\n"); 1622 goto err_out_free_intr; 1623 } 1624 1625 for (i = 0; i < enic->rq_count; i++) { 1626 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf); 1627 /* Need at least one buffer on ring to get going */ 1628 if (vnic_rq_desc_used(&enic->rq[i]) == 0) { 1629 netdev_err(netdev, "Unable to alloc receive buffers\n"); 1630 err = -ENOMEM; 1631 goto err_out_notify_unset; 1632 } 1633 } 1634 1635 for (i = 0; i < enic->wq_count; i++) 1636 vnic_wq_enable(&enic->wq[i]); 1637 for (i = 0; i < enic->rq_count; i++) 1638 vnic_rq_enable(&enic->rq[i]); 1639 1640 if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) 1641 enic_dev_add_station_addr(enic); 1642 1643 enic_set_rx_mode(netdev); 1644 1645 netif_wake_queue(netdev); 1646 1647 for (i = 0; i < enic->rq_count; i++) 1648 napi_enable(&enic->napi[i]); 1649 1650 enic_dev_enable(enic); 1651 1652 for (i = 0; i < enic->intr_count; i++) 1653 vnic_intr_unmask(&enic->intr[i]); 1654 1655 enic_notify_timer_start(enic); 1656 1657 return 0; 1658 1659err_out_notify_unset: 1660 enic_dev_notify_unset(enic); 1661err_out_free_intr: 1662 enic_free_intr(enic); 1663 1664 return err; 1665} 1666 1667/* rtnl lock is held, process context */ 1668static int enic_stop(struct net_device *netdev) 1669{ 1670 struct enic *enic = netdev_priv(netdev); 1671 unsigned int i; 1672 int err; 1673 1674 for (i = 0; i < enic->intr_count; i++) { 1675 vnic_intr_mask(&enic->intr[i]); 1676 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */ 1677 } 1678 1679 enic_synchronize_irqs(enic); 1680 1681 del_timer_sync(&enic->notify_timer); 1682 1683 enic_dev_disable(enic); 1684 1685 for (i = 0; i < enic->rq_count; i++) 1686 napi_disable(&enic->napi[i]); 1687 1688 netif_carrier_off(netdev); 1689 netif_tx_disable(netdev); 1690 1691 if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) 1692 enic_dev_del_station_addr(enic); 1693 1694 for (i = 0; i < enic->wq_count; i++) { 1695 err = vnic_wq_disable(&enic->wq[i]); 1696 if (err) 1697 return err; 1698 } 1699 for (i = 0; i < enic->rq_count; i++) { 1700 err = vnic_rq_disable(&enic->rq[i]); 1701 if (err) 1702 return err; 1703 } 1704 1705 enic_dev_notify_unset(enic); 1706 enic_free_intr(enic); 1707 1708 for (i = 0; i < enic->wq_count; i++) 1709 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf); 1710 for (i = 0; i < enic->rq_count; i++) 1711 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); 1712 for (i = 0; i < enic->cq_count; i++) 1713 vnic_cq_clean(&enic->cq[i]); 1714 for (i = 0; i < enic->intr_count; i++) 1715 vnic_intr_clean(&enic->intr[i]); 1716 1717 return 0; 1718} 1719 1720static int enic_change_mtu(struct net_device *netdev, int new_mtu) 1721{ 1722 struct enic *enic = netdev_priv(netdev); 1723 int running = netif_running(netdev); 1724 1725 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU) 1726 return -EINVAL; 1727 1728 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) 1729 return -EOPNOTSUPP; 1730 1731 if (running) 1732 enic_stop(netdev); 1733 1734 netdev->mtu = new_mtu; 1735 1736 if (netdev->mtu > enic->port_mtu) 1737 netdev_warn(netdev, 1738 "interface MTU (%d) set higher than port MTU (%d)\n", 1739 netdev->mtu, enic->port_mtu); 1740 1741 if (running) 1742 enic_open(netdev); 1743 1744 return 0; 1745} 1746 1747static void enic_change_mtu_work(struct work_struct *work) 1748{ 1749 struct enic *enic = container_of(work, struct enic, change_mtu_work); 1750 struct net_device *netdev = enic->netdev; 1751 int new_mtu = vnic_dev_mtu(enic->vdev); 1752 int err; 1753 unsigned int i; 1754 1755 new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu)); 1756 1757 rtnl_lock(); 1758 1759 /* Stop RQ */ 1760 del_timer_sync(&enic->notify_timer); 1761 1762 for (i = 0; i < enic->rq_count; i++) 1763 napi_disable(&enic->napi[i]); 1764 1765 vnic_intr_mask(&enic->intr[0]); 1766 enic_synchronize_irqs(enic); 1767 err = vnic_rq_disable(&enic->rq[0]); 1768 if (err) { 1769 netdev_err(netdev, "Unable to disable RQ.\n"); 1770 return; 1771 } 1772 vnic_rq_clean(&enic->rq[0], enic_free_rq_buf); 1773 vnic_cq_clean(&enic->cq[0]); 1774 vnic_intr_clean(&enic->intr[0]); 1775 1776 /* Fill RQ with new_mtu-sized buffers */ 1777 netdev->mtu = new_mtu; 1778 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); 1779 /* Need at least one buffer on ring to get going */ 1780 if (vnic_rq_desc_used(&enic->rq[0]) == 0) { 1781 netdev_err(netdev, "Unable to alloc receive buffers.\n"); 1782 return; 1783 } 1784 1785 /* Start RQ */ 1786 vnic_rq_enable(&enic->rq[0]); 1787 napi_enable(&enic->napi[0]); 1788 vnic_intr_unmask(&enic->intr[0]); 1789 enic_notify_timer_start(enic); 1790 1791 rtnl_unlock(); 1792 1793 netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu); 1794} 1795 1796#ifdef CONFIG_NET_POLL_CONTROLLER 1797static void enic_poll_controller(struct net_device *netdev) 1798{ 1799 struct enic *enic = netdev_priv(netdev); 1800 struct vnic_dev *vdev = enic->vdev; 1801 unsigned int i, intr; 1802 1803 switch (vnic_dev_get_intr_mode(vdev)) { 1804 case VNIC_DEV_INTR_MODE_MSIX: 1805 for (i = 0; i < enic->rq_count; i++) { 1806 intr = enic_msix_rq_intr(enic, i); 1807 enic_isr_msix_rq(enic->msix_entry[intr].vector, 1808 &enic->napi[i]); 1809 } 1810 1811 for (i = 0; i < enic->wq_count; i++) { 1812 intr = enic_msix_wq_intr(enic, i); 1813 enic_isr_msix_wq(enic->msix_entry[intr].vector, enic); 1814 } 1815 1816 break; 1817 case VNIC_DEV_INTR_MODE_MSI: 1818 enic_isr_msi(enic->pdev->irq, enic); 1819 break; 1820 case VNIC_DEV_INTR_MODE_INTX: 1821 enic_isr_legacy(enic->pdev->irq, netdev); 1822 break; 1823 default: 1824 break; 1825 } 1826} 1827#endif 1828 1829static int enic_dev_wait(struct vnic_dev *vdev, 1830 int (*start)(struct vnic_dev *, int), 1831 int (*finished)(struct vnic_dev *, int *), 1832 int arg) 1833{ 1834 unsigned long time; 1835 int done; 1836 int err; 1837 1838 BUG_ON(in_interrupt()); 1839 1840 err = start(vdev, arg); 1841 if (err) 1842 return err; 1843 1844 /* Wait for func to complete...2 seconds max 1845 */ 1846 1847 time = jiffies + (HZ * 2); 1848 do { 1849 1850 err = finished(vdev, &done); 1851 if (err) 1852 return err; 1853 1854 if (done) 1855 return 0; 1856 1857 schedule_timeout_uninterruptible(HZ / 10); 1858 1859 } while (time_after(time, jiffies)); 1860 1861 return -ETIMEDOUT; 1862} 1863 1864static int enic_dev_open(struct enic *enic) 1865{ 1866 int err; 1867 1868 err = enic_dev_wait(enic->vdev, vnic_dev_open, 1869 vnic_dev_open_done, 0); 1870 if (err) 1871 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n", 1872 err); 1873 1874 return err; 1875} 1876 1877static int enic_dev_hang_reset(struct enic *enic) 1878{ 1879 int err; 1880 1881 err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset, 1882 vnic_dev_hang_reset_done, 0); 1883 if (err) 1884 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n", 1885 err); 1886 1887 return err; 1888} 1889 1890static int enic_set_rsskey(struct enic *enic) 1891{ 1892 dma_addr_t rss_key_buf_pa; 1893 union vnic_rss_key *rss_key_buf_va = NULL; 1894 union vnic_rss_key rss_key = { 1895 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101}, 1896 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101}, 1897 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115}, 1898 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108}, 1899 }; 1900 int err; 1901 1902 rss_key_buf_va = pci_alloc_consistent(enic->pdev, 1903 sizeof(union vnic_rss_key), &rss_key_buf_pa); 1904 if (!rss_key_buf_va) 1905 return -ENOMEM; 1906 1907 memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key)); 1908 1909 spin_lock(&enic->devcmd_lock); 1910 err = enic_set_rss_key(enic, 1911 rss_key_buf_pa, 1912 sizeof(union vnic_rss_key)); 1913 spin_unlock(&enic->devcmd_lock); 1914 1915 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key), 1916 rss_key_buf_va, rss_key_buf_pa); 1917 1918 return err; 1919} 1920 1921static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits) 1922{ 1923 dma_addr_t rss_cpu_buf_pa; 1924 union vnic_rss_cpu *rss_cpu_buf_va = NULL; 1925 unsigned int i; 1926 int err; 1927 1928 rss_cpu_buf_va = pci_alloc_consistent(enic->pdev, 1929 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa); 1930 if (!rss_cpu_buf_va) 1931 return -ENOMEM; 1932 1933 for (i = 0; i < (1 << rss_hash_bits); i++) 1934 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count; 1935 1936 spin_lock(&enic->devcmd_lock); 1937 err = enic_set_rss_cpu(enic, 1938 rss_cpu_buf_pa, 1939 sizeof(union vnic_rss_cpu)); 1940 spin_unlock(&enic->devcmd_lock); 1941 1942 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu), 1943 rss_cpu_buf_va, rss_cpu_buf_pa); 1944 1945 return err; 1946} 1947 1948static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu, 1949 u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable) 1950{ 1951 const u8 tso_ipid_split_en = 0; 1952 const u8 ig_vlan_strip_en = 1; 1953 int err; 1954 1955 /* Enable VLAN tag stripping. 1956 */ 1957 1958 spin_lock(&enic->devcmd_lock); 1959 err = enic_set_nic_cfg(enic, 1960 rss_default_cpu, rss_hash_type, 1961 rss_hash_bits, rss_base_cpu, 1962 rss_enable, tso_ipid_split_en, 1963 ig_vlan_strip_en); 1964 spin_unlock(&enic->devcmd_lock); 1965 1966 return err; 1967} 1968 1969static int enic_set_rss_nic_cfg(struct enic *enic) 1970{ 1971 struct device *dev = enic_get_dev(enic); 1972 const u8 rss_default_cpu = 0; 1973 const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 | 1974 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 | 1975 NIC_CFG_RSS_HASH_TYPE_IPV6 | 1976 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6; 1977 const u8 rss_hash_bits = 7; 1978 const u8 rss_base_cpu = 0; 1979 u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1); 1980 1981 if (rss_enable) { 1982 if (!enic_set_rsskey(enic)) { 1983 if (enic_set_rsscpu(enic, rss_hash_bits)) { 1984 rss_enable = 0; 1985 dev_warn(dev, "RSS disabled, " 1986 "Failed to set RSS cpu indirection table."); 1987 } 1988 } else { 1989 rss_enable = 0; 1990 dev_warn(dev, "RSS disabled, Failed to set RSS key.\n"); 1991 } 1992 } 1993 1994 return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type, 1995 rss_hash_bits, rss_base_cpu, rss_enable); 1996} 1997 1998static void enic_reset(struct work_struct *work) 1999{ 2000 struct enic *enic = container_of(work, struct enic, reset); 2001 2002 if (!netif_running(enic->netdev)) 2003 return; 2004 2005 rtnl_lock(); 2006 2007 enic_dev_hang_notify(enic); 2008 enic_stop(enic->netdev); 2009 enic_dev_hang_reset(enic); 2010 enic_reset_addr_lists(enic); 2011 enic_init_vnic_resources(enic); 2012 enic_set_rss_nic_cfg(enic); 2013 enic_dev_set_ig_vlan_rewrite_mode(enic); 2014 enic_open(enic->netdev); 2015 2016 rtnl_unlock(); 2017} 2018 2019static int enic_set_intr_mode(struct enic *enic) 2020{ 2021 unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX); 2022 unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX); 2023 unsigned int i; 2024 2025 /* Set interrupt mode (INTx, MSI, MSI-X) depending 2026 * on system capabilities. 2027 * 2028 * Try MSI-X first 2029 * 2030 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs 2031 * (the second to last INTR is used for WQ/RQ errors) 2032 * (the last INTR is used for notifications) 2033 */ 2034 2035 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2); 2036 for (i = 0; i < n + m + 2; i++) 2037 enic->msix_entry[i].entry = i; 2038 2039 /* Use multiple RQs if RSS is enabled 2040 */ 2041 2042 if (ENIC_SETTING(enic, RSS) && 2043 enic->config.intr_mode < 1 && 2044 enic->rq_count >= n && 2045 enic->wq_count >= m && 2046 enic->cq_count >= n + m && 2047 enic->intr_count >= n + m + 2) { 2048 2049 if (!pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) { 2050 2051 enic->rq_count = n; 2052 enic->wq_count = m; 2053 enic->cq_count = n + m; 2054 enic->intr_count = n + m + 2; 2055 2056 vnic_dev_set_intr_mode(enic->vdev, 2057 VNIC_DEV_INTR_MODE_MSIX); 2058 2059 return 0; 2060 } 2061 } 2062 2063 if (enic->config.intr_mode < 1 && 2064 enic->rq_count >= 1 && 2065 enic->wq_count >= m && 2066 enic->cq_count >= 1 + m && 2067 enic->intr_count >= 1 + m + 2) { 2068 if (!pci_enable_msix(enic->pdev, enic->msix_entry, 1 + m + 2)) { 2069 2070 enic->rq_count = 1; 2071 enic->wq_count = m; 2072 enic->cq_count = 1 + m; 2073 enic->intr_count = 1 + m + 2; 2074 2075 vnic_dev_set_intr_mode(enic->vdev, 2076 VNIC_DEV_INTR_MODE_MSIX); 2077 2078 return 0; 2079 } 2080 } 2081 2082 /* Next try MSI 2083 * 2084 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR 2085 */ 2086 2087 if (enic->config.intr_mode < 2 && 2088 enic->rq_count >= 1 && 2089 enic->wq_count >= 1 && 2090 enic->cq_count >= 2 && 2091 enic->intr_count >= 1 && 2092 !pci_enable_msi(enic->pdev)) { 2093 2094 enic->rq_count = 1; 2095 enic->wq_count = 1; 2096 enic->cq_count = 2; 2097 enic->intr_count = 1; 2098 2099 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI); 2100 2101 return 0; 2102 } 2103 2104 /* Next try INTx 2105 * 2106 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs 2107 * (the first INTR is used for WQ/RQ) 2108 * (the second INTR is used for WQ/RQ errors) 2109 * (the last INTR is used for notifications) 2110 */ 2111 2112 if (enic->config.intr_mode < 3 && 2113 enic->rq_count >= 1 && 2114 enic->wq_count >= 1 && 2115 enic->cq_count >= 2 && 2116 enic->intr_count >= 3) { 2117 2118 enic->rq_count = 1; 2119 enic->wq_count = 1; 2120 enic->cq_count = 2; 2121 enic->intr_count = 3; 2122 2123 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX); 2124 2125 return 0; 2126 } 2127 2128 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2129 2130 return -EINVAL; 2131} 2132 2133static void enic_clear_intr_mode(struct enic *enic) 2134{ 2135 switch (vnic_dev_get_intr_mode(enic->vdev)) { 2136 case VNIC_DEV_INTR_MODE_MSIX: 2137 pci_disable_msix(enic->pdev); 2138 break; 2139 case VNIC_DEV_INTR_MODE_MSI: 2140 pci_disable_msi(enic->pdev); 2141 break; 2142 default: 2143 break; 2144 } 2145 2146 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2147} 2148 2149static const struct net_device_ops enic_netdev_dynamic_ops = { 2150 .ndo_open = enic_open, 2151 .ndo_stop = enic_stop, 2152 .ndo_start_xmit = enic_hard_start_xmit, 2153 .ndo_get_stats64 = enic_get_stats, 2154 .ndo_validate_addr = eth_validate_addr, 2155 .ndo_set_rx_mode = enic_set_rx_mode, 2156 .ndo_set_mac_address = enic_set_mac_address_dynamic, 2157 .ndo_change_mtu = enic_change_mtu, 2158 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2159 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2160 .ndo_tx_timeout = enic_tx_timeout, 2161 .ndo_set_vf_port = enic_set_vf_port, 2162 .ndo_get_vf_port = enic_get_vf_port, 2163 .ndo_set_vf_mac = enic_set_vf_mac, 2164#ifdef CONFIG_NET_POLL_CONTROLLER 2165 .ndo_poll_controller = enic_poll_controller, 2166#endif 2167}; 2168 2169static const struct net_device_ops enic_netdev_ops = { 2170 .ndo_open = enic_open, 2171 .ndo_stop = enic_stop, 2172 .ndo_start_xmit = enic_hard_start_xmit, 2173 .ndo_get_stats64 = enic_get_stats, 2174 .ndo_validate_addr = eth_validate_addr, 2175 .ndo_set_mac_address = enic_set_mac_address, 2176 .ndo_set_rx_mode = enic_set_rx_mode, 2177 .ndo_change_mtu = enic_change_mtu, 2178 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2179 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2180 .ndo_tx_timeout = enic_tx_timeout, 2181 .ndo_set_vf_port = enic_set_vf_port, 2182 .ndo_get_vf_port = enic_get_vf_port, 2183 .ndo_set_vf_mac = enic_set_vf_mac, 2184#ifdef CONFIG_NET_POLL_CONTROLLER 2185 .ndo_poll_controller = enic_poll_controller, 2186#endif 2187}; 2188 2189static void enic_dev_deinit(struct enic *enic) 2190{ 2191 unsigned int i; 2192 2193 for (i = 0; i < enic->rq_count; i++) 2194 netif_napi_del(&enic->napi[i]); 2195 2196 enic_free_vnic_resources(enic); 2197 enic_clear_intr_mode(enic); 2198} 2199 2200static int enic_dev_init(struct enic *enic) 2201{ 2202 struct device *dev = enic_get_dev(enic); 2203 struct net_device *netdev = enic->netdev; 2204 unsigned int i; 2205 int err; 2206 2207 /* Get interrupt coalesce timer info */ 2208 err = enic_dev_intr_coal_timer_info(enic); 2209 if (err) { 2210 dev_warn(dev, "Using default conversion factor for " 2211 "interrupt coalesce timer\n"); 2212 vnic_dev_intr_coal_timer_info_default(enic->vdev); 2213 } 2214 2215 /* Get vNIC configuration 2216 */ 2217 2218 err = enic_get_vnic_config(enic); 2219 if (err) { 2220 dev_err(dev, "Get vNIC configuration failed, aborting\n"); 2221 return err; 2222 } 2223 2224 /* Get available resource counts 2225 */ 2226 2227 enic_get_res_counts(enic); 2228 2229 /* Set interrupt mode based on resource counts and system 2230 * capabilities 2231 */ 2232 2233 err = enic_set_intr_mode(enic); 2234 if (err) { 2235 dev_err(dev, "Failed to set intr mode based on resource " 2236 "counts and system capabilities, aborting\n"); 2237 return err; 2238 } 2239 2240 /* Allocate and configure vNIC resources 2241 */ 2242 2243 err = enic_alloc_vnic_resources(enic); 2244 if (err) { 2245 dev_err(dev, "Failed to alloc vNIC resources, aborting\n"); 2246 goto err_out_free_vnic_resources; 2247 } 2248 2249 enic_init_vnic_resources(enic); 2250 2251 err = enic_set_rss_nic_cfg(enic); 2252 if (err) { 2253 dev_err(dev, "Failed to config nic, aborting\n"); 2254 goto err_out_free_vnic_resources; 2255 } 2256 2257 switch (vnic_dev_get_intr_mode(enic->vdev)) { 2258 default: 2259 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64); 2260 break; 2261 case VNIC_DEV_INTR_MODE_MSIX: 2262 for (i = 0; i < enic->rq_count; i++) 2263 netif_napi_add(netdev, &enic->napi[i], 2264 enic_poll_msix, 64); 2265 break; 2266 } 2267 2268 return 0; 2269 2270err_out_free_vnic_resources: 2271 enic_clear_intr_mode(enic); 2272 enic_free_vnic_resources(enic); 2273 2274 return err; 2275} 2276 2277static void enic_iounmap(struct enic *enic) 2278{ 2279 unsigned int i; 2280 2281 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) 2282 if (enic->bar[i].vaddr) 2283 iounmap(enic->bar[i].vaddr); 2284} 2285 2286static int __devinit enic_probe(struct pci_dev *pdev, 2287 const struct pci_device_id *ent) 2288{ 2289 struct device *dev = &pdev->dev; 2290 struct net_device *netdev; 2291 struct enic *enic; 2292 int using_dac = 0; 2293 unsigned int i; 2294 int err; 2295#ifdef CONFIG_PCI_IOV 2296 int pos = 0; 2297#endif 2298 int num_pps = 1; 2299 2300 /* Allocate net device structure and initialize. Private 2301 * instance data is initialized to zero. 2302 */ 2303 2304 netdev = alloc_etherdev(sizeof(struct enic)); 2305 if (!netdev) 2306 return -ENOMEM; 2307 2308 pci_set_drvdata(pdev, netdev); 2309 2310 SET_NETDEV_DEV(netdev, &pdev->dev); 2311 2312 enic = netdev_priv(netdev); 2313 enic->netdev = netdev; 2314 enic->pdev = pdev; 2315 2316 /* Setup PCI resources 2317 */ 2318 2319 err = pci_enable_device_mem(pdev); 2320 if (err) { 2321 dev_err(dev, "Cannot enable PCI device, aborting\n"); 2322 goto err_out_free_netdev; 2323 } 2324 2325 err = pci_request_regions(pdev, DRV_NAME); 2326 if (err) { 2327 dev_err(dev, "Cannot request PCI regions, aborting\n"); 2328 goto err_out_disable_device; 2329 } 2330 2331 pci_set_master(pdev); 2332 2333 /* Query PCI controller on system for DMA addressing 2334 * limitation for the device. Try 40-bit first, and 2335 * fail to 32-bit. 2336 */ 2337 2338 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40)); 2339 if (err) { 2340 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 2341 if (err) { 2342 dev_err(dev, "No usable DMA configuration, aborting\n"); 2343 goto err_out_release_regions; 2344 } 2345 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 2346 if (err) { 2347 dev_err(dev, "Unable to obtain %u-bit DMA " 2348 "for consistent allocations, aborting\n", 32); 2349 goto err_out_release_regions; 2350 } 2351 } else { 2352 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40)); 2353 if (err) { 2354 dev_err(dev, "Unable to obtain %u-bit DMA " 2355 "for consistent allocations, aborting\n", 40); 2356 goto err_out_release_regions; 2357 } 2358 using_dac = 1; 2359 } 2360 2361 /* Map vNIC resources from BAR0-5 2362 */ 2363 2364 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) { 2365 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM)) 2366 continue; 2367 enic->bar[i].len = pci_resource_len(pdev, i); 2368 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len); 2369 if (!enic->bar[i].vaddr) { 2370 dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i); 2371 err = -ENODEV; 2372 goto err_out_iounmap; 2373 } 2374 enic->bar[i].bus_addr = pci_resource_start(pdev, i); 2375 } 2376 2377 /* Register vNIC device 2378 */ 2379 2380 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar, 2381 ARRAY_SIZE(enic->bar)); 2382 if (!enic->vdev) { 2383 dev_err(dev, "vNIC registration failed, aborting\n"); 2384 err = -ENODEV; 2385 goto err_out_iounmap; 2386 } 2387 2388#ifdef CONFIG_PCI_IOV 2389 /* Get number of subvnics */ 2390 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV); 2391 if (pos) { 2392 pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF, 2393 &enic->num_vfs); 2394 if (enic->num_vfs) { 2395 err = pci_enable_sriov(pdev, enic->num_vfs); 2396 if (err) { 2397 dev_err(dev, "SRIOV enable failed, aborting." 2398 " pci_enable_sriov() returned %d\n", 2399 err); 2400 goto err_out_vnic_unregister; 2401 } 2402 enic->priv_flags |= ENIC_SRIOV_ENABLED; 2403 num_pps = enic->num_vfs; 2404 } 2405 } 2406#endif 2407 2408 /* Allocate structure for port profiles */ 2409 enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL); 2410 if (!enic->pp) { 2411 err = -ENOMEM; 2412 goto err_out_disable_sriov_pp; 2413 } 2414 2415 /* Issue device open to get device in known state 2416 */ 2417 2418 err = enic_dev_open(enic); 2419 if (err) { 2420 dev_err(dev, "vNIC dev open failed, aborting\n"); 2421 goto err_out_disable_sriov; 2422 } 2423 2424 /* Setup devcmd lock 2425 */ 2426 2427 spin_lock_init(&enic->devcmd_lock); 2428 2429 /* 2430 * Set ingress vlan rewrite mode before vnic initialization 2431 */ 2432 2433 err = enic_dev_set_ig_vlan_rewrite_mode(enic); 2434 if (err) { 2435 dev_err(dev, 2436 "Failed to set ingress vlan rewrite mode, aborting.\n"); 2437 goto err_out_dev_close; 2438 } 2439 2440 /* Issue device init to initialize the vnic-to-switch link. 2441 * We'll start with carrier off and wait for link UP 2442 * notification later to turn on carrier. We don't need 2443 * to wait here for the vnic-to-switch link initialization 2444 * to complete; link UP notification is the indication that 2445 * the process is complete. 2446 */ 2447 2448 netif_carrier_off(netdev); 2449 2450 /* Do not call dev_init for a dynamic vnic. 2451 * For a dynamic vnic, init_prov_info will be 2452 * called later by an upper layer. 2453 */ 2454 2455 if (!enic_is_dynamic(enic)) { 2456 err = vnic_dev_init(enic->vdev, 0); 2457 if (err) { 2458 dev_err(dev, "vNIC dev init failed, aborting\n"); 2459 goto err_out_dev_close; 2460 } 2461 } 2462 2463 err = enic_dev_init(enic); 2464 if (err) { 2465 dev_err(dev, "Device initialization failed, aborting\n"); 2466 goto err_out_dev_close; 2467 } 2468 2469 /* Setup notification timer, HW reset task, and wq locks 2470 */ 2471 2472 init_timer(&enic->notify_timer); 2473 enic->notify_timer.function = enic_notify_timer; 2474 enic->notify_timer.data = (unsigned long)enic; 2475 2476 INIT_WORK(&enic->reset, enic_reset); 2477 INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work); 2478 2479 for (i = 0; i < enic->wq_count; i++) 2480 spin_lock_init(&enic->wq_lock[i]); 2481 2482 /* Register net device 2483 */ 2484 2485 enic->port_mtu = enic->config.mtu; 2486 (void)enic_change_mtu(netdev, enic->port_mtu); 2487 2488 err = enic_set_mac_addr(netdev, enic->mac_addr); 2489 if (err) { 2490 dev_err(dev, "Invalid MAC address, aborting\n"); 2491 goto err_out_dev_deinit; 2492 } 2493 2494 enic->tx_coalesce_usecs = enic->config.intr_timer_usec; 2495 enic->rx_coalesce_usecs = enic->tx_coalesce_usecs; 2496 2497 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) 2498 netdev->netdev_ops = &enic_netdev_dynamic_ops; 2499 else 2500 netdev->netdev_ops = &enic_netdev_ops; 2501 2502 netdev->watchdog_timeo = 2 * HZ; 2503 netdev->ethtool_ops = &enic_ethtool_ops; 2504 2505 netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; 2506 if (ENIC_SETTING(enic, LOOP)) { 2507 netdev->features &= ~NETIF_F_HW_VLAN_TX; 2508 enic->loop_enable = 1; 2509 enic->loop_tag = enic->config.loop_tag; 2510 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag); 2511 } 2512 if (ENIC_SETTING(enic, TXCSUM)) 2513 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM; 2514 if (ENIC_SETTING(enic, TSO)) 2515 netdev->hw_features |= NETIF_F_TSO | 2516 NETIF_F_TSO6 | NETIF_F_TSO_ECN; 2517 if (ENIC_SETTING(enic, RXCSUM)) 2518 netdev->hw_features |= NETIF_F_RXCSUM; 2519 2520 netdev->features |= netdev->hw_features; 2521 2522 if (using_dac) 2523 netdev->features |= NETIF_F_HIGHDMA; 2524 2525 netdev->priv_flags |= IFF_UNICAST_FLT; 2526 2527 err = register_netdev(netdev); 2528 if (err) { 2529 dev_err(dev, "Cannot register net device, aborting\n"); 2530 goto err_out_dev_deinit; 2531 } 2532 2533 return 0; 2534 2535err_out_dev_deinit: 2536 enic_dev_deinit(enic); 2537err_out_dev_close: 2538 vnic_dev_close(enic->vdev); 2539err_out_disable_sriov: 2540 kfree(enic->pp); 2541err_out_disable_sriov_pp: 2542#ifdef CONFIG_PCI_IOV 2543 if (enic_sriov_enabled(enic)) { 2544 pci_disable_sriov(pdev); 2545 enic->priv_flags &= ~ENIC_SRIOV_ENABLED; 2546 } 2547err_out_vnic_unregister: 2548#endif 2549 vnic_dev_unregister(enic->vdev); 2550err_out_iounmap: 2551 enic_iounmap(enic); 2552err_out_release_regions: 2553 pci_release_regions(pdev); 2554err_out_disable_device: 2555 pci_disable_device(pdev); 2556err_out_free_netdev: 2557 pci_set_drvdata(pdev, NULL); 2558 free_netdev(netdev); 2559 2560 return err; 2561} 2562 2563static void __devexit enic_remove(struct pci_dev *pdev) 2564{ 2565 struct net_device *netdev = pci_get_drvdata(pdev); 2566 2567 if (netdev) { 2568 struct enic *enic = netdev_priv(netdev); 2569 2570 cancel_work_sync(&enic->reset); 2571 cancel_work_sync(&enic->change_mtu_work); 2572 unregister_netdev(netdev); 2573 enic_dev_deinit(enic); 2574 vnic_dev_close(enic->vdev); 2575#ifdef CONFIG_PCI_IOV 2576 if (enic_sriov_enabled(enic)) { 2577 pci_disable_sriov(pdev); 2578 enic->priv_flags &= ~ENIC_SRIOV_ENABLED; 2579 } 2580#endif 2581 kfree(enic->pp); 2582 vnic_dev_unregister(enic->vdev); 2583 enic_iounmap(enic); 2584 pci_release_regions(pdev); 2585 pci_disable_device(pdev); 2586 pci_set_drvdata(pdev, NULL); 2587 free_netdev(netdev); 2588 } 2589} 2590 2591static struct pci_driver enic_driver = { 2592 .name = DRV_NAME, 2593 .id_table = enic_id_table, 2594 .probe = enic_probe, 2595 .remove = __devexit_p(enic_remove), 2596}; 2597 2598static int __init enic_init_module(void) 2599{ 2600 pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); 2601 2602 return pci_register_driver(&enic_driver); 2603} 2604 2605static void __exit enic_cleanup_module(void) 2606{ 2607 pci_unregister_driver(&enic_driver); 2608} 2609 2610module_init(enic_init_module); 2611module_exit(enic_cleanup_module); 2612