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/workqueue.h> 27#include <linux/pci.h> 28#include <linux/netdevice.h> 29#include <linux/etherdevice.h> 30#include <linux/if_ether.h> 31#include <linux/if_vlan.h> 32#include <linux/ethtool.h> 33#include <linux/in.h> 34#include <linux/ip.h> 35#include <linux/ipv6.h> 36#include <linux/tcp.h> 37#include <linux/rtnetlink.h> 38#include <net/ip6_checksum.h> 39 40#include "cq_enet_desc.h" 41#include "vnic_dev.h" 42#include "vnic_intr.h" 43#include "vnic_stats.h" 44#include "vnic_vic.h" 45#include "enic_res.h" 46#include "enic.h" 47 48#define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ) 49#define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS) 50#define MAX_TSO (1 << 16) 51#define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1) 52 53#define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */ 54#define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */ 55 56/* Supported devices */ 57static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = { 58 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) }, 59 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) }, 60 { 0, } /* end of table */ 61}; 62 63MODULE_DESCRIPTION(DRV_DESCRIPTION); 64MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>"); 65MODULE_LICENSE("GPL"); 66MODULE_VERSION(DRV_VERSION); 67MODULE_DEVICE_TABLE(pci, enic_id_table); 68 69struct enic_stat { 70 char name[ETH_GSTRING_LEN]; 71 unsigned int offset; 72}; 73 74#define ENIC_TX_STAT(stat) \ 75 { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 } 76#define ENIC_RX_STAT(stat) \ 77 { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 } 78 79static const struct enic_stat enic_tx_stats[] = { 80 ENIC_TX_STAT(tx_frames_ok), 81 ENIC_TX_STAT(tx_unicast_frames_ok), 82 ENIC_TX_STAT(tx_multicast_frames_ok), 83 ENIC_TX_STAT(tx_broadcast_frames_ok), 84 ENIC_TX_STAT(tx_bytes_ok), 85 ENIC_TX_STAT(tx_unicast_bytes_ok), 86 ENIC_TX_STAT(tx_multicast_bytes_ok), 87 ENIC_TX_STAT(tx_broadcast_bytes_ok), 88 ENIC_TX_STAT(tx_drops), 89 ENIC_TX_STAT(tx_errors), 90 ENIC_TX_STAT(tx_tso), 91}; 92 93static const struct enic_stat enic_rx_stats[] = { 94 ENIC_RX_STAT(rx_frames_ok), 95 ENIC_RX_STAT(rx_frames_total), 96 ENIC_RX_STAT(rx_unicast_frames_ok), 97 ENIC_RX_STAT(rx_multicast_frames_ok), 98 ENIC_RX_STAT(rx_broadcast_frames_ok), 99 ENIC_RX_STAT(rx_bytes_ok), 100 ENIC_RX_STAT(rx_unicast_bytes_ok), 101 ENIC_RX_STAT(rx_multicast_bytes_ok), 102 ENIC_RX_STAT(rx_broadcast_bytes_ok), 103 ENIC_RX_STAT(rx_drop), 104 ENIC_RX_STAT(rx_no_bufs), 105 ENIC_RX_STAT(rx_errors), 106 ENIC_RX_STAT(rx_rss), 107 ENIC_RX_STAT(rx_crc_errors), 108 ENIC_RX_STAT(rx_frames_64), 109 ENIC_RX_STAT(rx_frames_127), 110 ENIC_RX_STAT(rx_frames_255), 111 ENIC_RX_STAT(rx_frames_511), 112 ENIC_RX_STAT(rx_frames_1023), 113 ENIC_RX_STAT(rx_frames_1518), 114 ENIC_RX_STAT(rx_frames_to_max), 115}; 116 117static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats); 118static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats); 119 120static int enic_is_dynamic(struct enic *enic) 121{ 122 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN; 123} 124 125static int enic_get_settings(struct net_device *netdev, 126 struct ethtool_cmd *ecmd) 127{ 128 struct enic *enic = netdev_priv(netdev); 129 130 ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE); 131 ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE); 132 ecmd->port = PORT_FIBRE; 133 ecmd->transceiver = XCVR_EXTERNAL; 134 135 if (netif_carrier_ok(netdev)) { 136 ecmd->speed = vnic_dev_port_speed(enic->vdev); 137 ecmd->duplex = DUPLEX_FULL; 138 } else { 139 ecmd->speed = -1; 140 ecmd->duplex = -1; 141 } 142 143 ecmd->autoneg = AUTONEG_DISABLE; 144 145 return 0; 146} 147 148static int enic_dev_fw_info(struct enic *enic, 149 struct vnic_devcmd_fw_info **fw_info) 150{ 151 int err; 152 153 spin_lock(&enic->devcmd_lock); 154 err = vnic_dev_fw_info(enic->vdev, fw_info); 155 spin_unlock(&enic->devcmd_lock); 156 157 return err; 158} 159 160static void enic_get_drvinfo(struct net_device *netdev, 161 struct ethtool_drvinfo *drvinfo) 162{ 163 struct enic *enic = netdev_priv(netdev); 164 struct vnic_devcmd_fw_info *fw_info; 165 166 enic_dev_fw_info(enic, &fw_info); 167 168 strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); 169 strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version)); 170 strncpy(drvinfo->fw_version, fw_info->fw_version, 171 sizeof(drvinfo->fw_version)); 172 strncpy(drvinfo->bus_info, pci_name(enic->pdev), 173 sizeof(drvinfo->bus_info)); 174} 175 176static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data) 177{ 178 unsigned int i; 179 180 switch (stringset) { 181 case ETH_SS_STATS: 182 for (i = 0; i < enic_n_tx_stats; i++) { 183 memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN); 184 data += ETH_GSTRING_LEN; 185 } 186 for (i = 0; i < enic_n_rx_stats; i++) { 187 memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN); 188 data += ETH_GSTRING_LEN; 189 } 190 break; 191 } 192} 193 194static int enic_get_sset_count(struct net_device *netdev, int sset) 195{ 196 switch (sset) { 197 case ETH_SS_STATS: 198 return enic_n_tx_stats + enic_n_rx_stats; 199 default: 200 return -EOPNOTSUPP; 201 } 202} 203 204static int enic_dev_stats_dump(struct enic *enic, struct vnic_stats **vstats) 205{ 206 int err; 207 208 spin_lock(&enic->devcmd_lock); 209 err = vnic_dev_stats_dump(enic->vdev, vstats); 210 spin_unlock(&enic->devcmd_lock); 211 212 return err; 213} 214 215static void enic_get_ethtool_stats(struct net_device *netdev, 216 struct ethtool_stats *stats, u64 *data) 217{ 218 struct enic *enic = netdev_priv(netdev); 219 struct vnic_stats *vstats; 220 unsigned int i; 221 222 enic_dev_stats_dump(enic, &vstats); 223 224 for (i = 0; i < enic_n_tx_stats; i++) 225 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset]; 226 for (i = 0; i < enic_n_rx_stats; i++) 227 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset]; 228} 229 230static u32 enic_get_rx_csum(struct net_device *netdev) 231{ 232 struct enic *enic = netdev_priv(netdev); 233 return enic->csum_rx_enabled; 234} 235 236static int enic_set_rx_csum(struct net_device *netdev, u32 data) 237{ 238 struct enic *enic = netdev_priv(netdev); 239 240 if (data && !ENIC_SETTING(enic, RXCSUM)) 241 return -EINVAL; 242 243 enic->csum_rx_enabled = !!data; 244 245 return 0; 246} 247 248static int enic_set_tx_csum(struct net_device *netdev, u32 data) 249{ 250 struct enic *enic = netdev_priv(netdev); 251 252 if (data && !ENIC_SETTING(enic, TXCSUM)) 253 return -EINVAL; 254 255 if (data) 256 netdev->features |= NETIF_F_HW_CSUM; 257 else 258 netdev->features &= ~NETIF_F_HW_CSUM; 259 260 return 0; 261} 262 263static int enic_set_tso(struct net_device *netdev, u32 data) 264{ 265 struct enic *enic = netdev_priv(netdev); 266 267 if (data && !ENIC_SETTING(enic, TSO)) 268 return -EINVAL; 269 270 if (data) 271 netdev->features |= 272 NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN; 273 else 274 netdev->features &= 275 ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN); 276 277 return 0; 278} 279 280static u32 enic_get_msglevel(struct net_device *netdev) 281{ 282 struct enic *enic = netdev_priv(netdev); 283 return enic->msg_enable; 284} 285 286static void enic_set_msglevel(struct net_device *netdev, u32 value) 287{ 288 struct enic *enic = netdev_priv(netdev); 289 enic->msg_enable = value; 290} 291 292static int enic_get_coalesce(struct net_device *netdev, 293 struct ethtool_coalesce *ecmd) 294{ 295 struct enic *enic = netdev_priv(netdev); 296 297 ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs; 298 ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs; 299 300 return 0; 301} 302 303static int enic_set_coalesce(struct net_device *netdev, 304 struct ethtool_coalesce *ecmd) 305{ 306 struct enic *enic = netdev_priv(netdev); 307 u32 tx_coalesce_usecs; 308 u32 rx_coalesce_usecs; 309 310 tx_coalesce_usecs = min_t(u32, 311 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX), 312 ecmd->tx_coalesce_usecs); 313 rx_coalesce_usecs = min_t(u32, 314 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX), 315 ecmd->rx_coalesce_usecs); 316 317 switch (vnic_dev_get_intr_mode(enic->vdev)) { 318 case VNIC_DEV_INTR_MODE_INTX: 319 if (tx_coalesce_usecs != rx_coalesce_usecs) 320 return -EINVAL; 321 322 vnic_intr_coalescing_timer_set(&enic->intr[ENIC_INTX_WQ_RQ], 323 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs)); 324 break; 325 case VNIC_DEV_INTR_MODE_MSI: 326 if (tx_coalesce_usecs != rx_coalesce_usecs) 327 return -EINVAL; 328 329 vnic_intr_coalescing_timer_set(&enic->intr[0], 330 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs)); 331 break; 332 case VNIC_DEV_INTR_MODE_MSIX: 333 vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_WQ], 334 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs)); 335 vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_RQ], 336 INTR_COALESCE_USEC_TO_HW(rx_coalesce_usecs)); 337 break; 338 default: 339 break; 340 } 341 342 enic->tx_coalesce_usecs = tx_coalesce_usecs; 343 enic->rx_coalesce_usecs = rx_coalesce_usecs; 344 345 return 0; 346} 347 348static const struct ethtool_ops enic_ethtool_ops = { 349 .get_settings = enic_get_settings, 350 .get_drvinfo = enic_get_drvinfo, 351 .get_msglevel = enic_get_msglevel, 352 .set_msglevel = enic_set_msglevel, 353 .get_link = ethtool_op_get_link, 354 .get_strings = enic_get_strings, 355 .get_sset_count = enic_get_sset_count, 356 .get_ethtool_stats = enic_get_ethtool_stats, 357 .get_rx_csum = enic_get_rx_csum, 358 .set_rx_csum = enic_set_rx_csum, 359 .get_tx_csum = ethtool_op_get_tx_csum, 360 .set_tx_csum = enic_set_tx_csum, 361 .get_sg = ethtool_op_get_sg, 362 .set_sg = ethtool_op_set_sg, 363 .get_tso = ethtool_op_get_tso, 364 .set_tso = enic_set_tso, 365 .get_coalesce = enic_get_coalesce, 366 .set_coalesce = enic_set_coalesce, 367 .get_flags = ethtool_op_get_flags, 368}; 369 370static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) 371{ 372 struct enic *enic = vnic_dev_priv(wq->vdev); 373 374 if (buf->sop) 375 pci_unmap_single(enic->pdev, buf->dma_addr, 376 buf->len, PCI_DMA_TODEVICE); 377 else 378 pci_unmap_page(enic->pdev, buf->dma_addr, 379 buf->len, PCI_DMA_TODEVICE); 380 381 if (buf->os_buf) 382 dev_kfree_skb_any(buf->os_buf); 383} 384 385static void enic_wq_free_buf(struct vnic_wq *wq, 386 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque) 387{ 388 enic_free_wq_buf(wq, buf); 389} 390 391static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, 392 u8 type, u16 q_number, u16 completed_index, void *opaque) 393{ 394 struct enic *enic = vnic_dev_priv(vdev); 395 396 spin_lock(&enic->wq_lock[q_number]); 397 398 vnic_wq_service(&enic->wq[q_number], cq_desc, 399 completed_index, enic_wq_free_buf, 400 opaque); 401 402 if (netif_queue_stopped(enic->netdev) && 403 vnic_wq_desc_avail(&enic->wq[q_number]) >= 404 (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)) 405 netif_wake_queue(enic->netdev); 406 407 spin_unlock(&enic->wq_lock[q_number]); 408 409 return 0; 410} 411 412static void enic_log_q_error(struct enic *enic) 413{ 414 unsigned int i; 415 u32 error_status; 416 417 for (i = 0; i < enic->wq_count; i++) { 418 error_status = vnic_wq_error_status(&enic->wq[i]); 419 if (error_status) 420 netdev_err(enic->netdev, "WQ[%d] error_status %d\n", 421 i, error_status); 422 } 423 424 for (i = 0; i < enic->rq_count; i++) { 425 error_status = vnic_rq_error_status(&enic->rq[i]); 426 if (error_status) 427 netdev_err(enic->netdev, "RQ[%d] error_status %d\n", 428 i, error_status); 429 } 430} 431 432static void enic_msglvl_check(struct enic *enic) 433{ 434 u32 msg_enable = vnic_dev_msg_lvl(enic->vdev); 435 436 if (msg_enable != enic->msg_enable) { 437 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n", 438 enic->msg_enable, msg_enable); 439 enic->msg_enable = msg_enable; 440 } 441} 442 443static void enic_mtu_check(struct enic *enic) 444{ 445 u32 mtu = vnic_dev_mtu(enic->vdev); 446 struct net_device *netdev = enic->netdev; 447 448 if (mtu && mtu != enic->port_mtu) { 449 enic->port_mtu = mtu; 450 if (mtu < netdev->mtu) 451 netdev_warn(netdev, 452 "interface MTU (%d) set higher " 453 "than switch port MTU (%d)\n", 454 netdev->mtu, mtu); 455 } 456} 457 458static void enic_link_check(struct enic *enic) 459{ 460 int link_status = vnic_dev_link_status(enic->vdev); 461 int carrier_ok = netif_carrier_ok(enic->netdev); 462 463 if (link_status && !carrier_ok) { 464 netdev_info(enic->netdev, "Link UP\n"); 465 netif_carrier_on(enic->netdev); 466 } else if (!link_status && carrier_ok) { 467 netdev_info(enic->netdev, "Link DOWN\n"); 468 netif_carrier_off(enic->netdev); 469 } 470} 471 472static void enic_notify_check(struct enic *enic) 473{ 474 enic_msglvl_check(enic); 475 enic_mtu_check(enic); 476 enic_link_check(enic); 477} 478 479#define ENIC_TEST_INTR(pba, i) (pba & (1 << i)) 480 481static irqreturn_t enic_isr_legacy(int irq, void *data) 482{ 483 struct net_device *netdev = data; 484 struct enic *enic = netdev_priv(netdev); 485 u32 pba; 486 487 vnic_intr_mask(&enic->intr[ENIC_INTX_WQ_RQ]); 488 489 pba = vnic_intr_legacy_pba(enic->legacy_pba); 490 if (!pba) { 491 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]); 492 return IRQ_NONE; /* not our interrupt */ 493 } 494 495 if (ENIC_TEST_INTR(pba, ENIC_INTX_NOTIFY)) { 496 vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_NOTIFY]); 497 enic_notify_check(enic); 498 } 499 500 if (ENIC_TEST_INTR(pba, ENIC_INTX_ERR)) { 501 vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_ERR]); 502 enic_log_q_error(enic); 503 /* schedule recovery from WQ/RQ error */ 504 schedule_work(&enic->reset); 505 return IRQ_HANDLED; 506 } 507 508 if (ENIC_TEST_INTR(pba, ENIC_INTX_WQ_RQ)) { 509 if (napi_schedule_prep(&enic->napi)) 510 __napi_schedule(&enic->napi); 511 } else { 512 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]); 513 } 514 515 return IRQ_HANDLED; 516} 517 518static irqreturn_t enic_isr_msi(int irq, void *data) 519{ 520 struct enic *enic = data; 521 522 /* With MSI, there is no sharing of interrupts, so this is 523 * our interrupt and there is no need to ack it. The device 524 * is not providing per-vector masking, so the OS will not 525 * write to PCI config space to mask/unmask the interrupt. 526 * We're using mask_on_assertion for MSI, so the device 527 * automatically masks the interrupt when the interrupt is 528 * generated. Later, when exiting polling, the interrupt 529 * will be unmasked (see enic_poll). 530 * 531 * Also, the device uses the same PCIe Traffic Class (TC) 532 * for Memory Write data and MSI, so there are no ordering 533 * issues; the MSI will always arrive at the Root Complex 534 * _after_ corresponding Memory Writes (i.e. descriptor 535 * writes). 536 */ 537 538 napi_schedule(&enic->napi); 539 540 return IRQ_HANDLED; 541} 542 543static irqreturn_t enic_isr_msix_rq(int irq, void *data) 544{ 545 struct enic *enic = data; 546 547 /* schedule NAPI polling for RQ cleanup */ 548 napi_schedule(&enic->napi); 549 550 return IRQ_HANDLED; 551} 552 553static irqreturn_t enic_isr_msix_wq(int irq, void *data) 554{ 555 struct enic *enic = data; 556 unsigned int wq_work_to_do = -1; /* no limit */ 557 unsigned int wq_work_done; 558 559 wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ], 560 wq_work_to_do, enic_wq_service, NULL); 561 562 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_WQ], 563 wq_work_done, 564 1 /* unmask intr */, 565 1 /* reset intr timer */); 566 567 return IRQ_HANDLED; 568} 569 570static irqreturn_t enic_isr_msix_err(int irq, void *data) 571{ 572 struct enic *enic = data; 573 574 vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_ERR]); 575 576 enic_log_q_error(enic); 577 578 /* schedule recovery from WQ/RQ error */ 579 schedule_work(&enic->reset); 580 581 return IRQ_HANDLED; 582} 583 584static irqreturn_t enic_isr_msix_notify(int irq, void *data) 585{ 586 struct enic *enic = data; 587 588 vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_NOTIFY]); 589 enic_notify_check(enic); 590 591 return IRQ_HANDLED; 592} 593 594static inline void enic_queue_wq_skb_cont(struct enic *enic, 595 struct vnic_wq *wq, struct sk_buff *skb, 596 unsigned int len_left, int loopback) 597{ 598 skb_frag_t *frag; 599 600 /* Queue additional data fragments */ 601 for (frag = skb_shinfo(skb)->frags; len_left; frag++) { 602 len_left -= frag->size; 603 enic_queue_wq_desc_cont(wq, skb, 604 pci_map_page(enic->pdev, frag->page, 605 frag->page_offset, frag->size, 606 PCI_DMA_TODEVICE), 607 frag->size, 608 (len_left == 0), /* EOP? */ 609 loopback); 610 } 611} 612 613static inline void enic_queue_wq_skb_vlan(struct enic *enic, 614 struct vnic_wq *wq, struct sk_buff *skb, 615 int vlan_tag_insert, unsigned int vlan_tag, int loopback) 616{ 617 unsigned int head_len = skb_headlen(skb); 618 unsigned int len_left = skb->len - head_len; 619 int eop = (len_left == 0); 620 621 /* Queue the main skb fragment. The fragments are no larger 622 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less 623 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor 624 * per fragment is queued. 625 */ 626 enic_queue_wq_desc(wq, skb, 627 pci_map_single(enic->pdev, skb->data, 628 head_len, PCI_DMA_TODEVICE), 629 head_len, 630 vlan_tag_insert, vlan_tag, 631 eop, loopback); 632 633 if (!eop) 634 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 635} 636 637static inline void enic_queue_wq_skb_csum_l4(struct enic *enic, 638 struct vnic_wq *wq, struct sk_buff *skb, 639 int vlan_tag_insert, unsigned int vlan_tag, int loopback) 640{ 641 unsigned int head_len = skb_headlen(skb); 642 unsigned int len_left = skb->len - head_len; 643 unsigned int hdr_len = skb_transport_offset(skb); 644 unsigned int csum_offset = hdr_len + skb->csum_offset; 645 int eop = (len_left == 0); 646 647 /* Queue the main skb fragment. The fragments are no larger 648 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less 649 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor 650 * per fragment is queued. 651 */ 652 enic_queue_wq_desc_csum_l4(wq, skb, 653 pci_map_single(enic->pdev, skb->data, 654 head_len, PCI_DMA_TODEVICE), 655 head_len, 656 csum_offset, 657 hdr_len, 658 vlan_tag_insert, vlan_tag, 659 eop, loopback); 660 661 if (!eop) 662 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 663} 664 665static inline void enic_queue_wq_skb_tso(struct enic *enic, 666 struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss, 667 int vlan_tag_insert, unsigned int vlan_tag, int loopback) 668{ 669 unsigned int frag_len_left = skb_headlen(skb); 670 unsigned int len_left = skb->len - frag_len_left; 671 unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 672 int eop = (len_left == 0); 673 unsigned int len; 674 dma_addr_t dma_addr; 675 unsigned int offset = 0; 676 skb_frag_t *frag; 677 678 /* Preload TCP csum field with IP pseudo hdr calculated 679 * with IP length set to zero. HW will later add in length 680 * to each TCP segment resulting from the TSO. 681 */ 682 683 if (skb->protocol == cpu_to_be16(ETH_P_IP)) { 684 ip_hdr(skb)->check = 0; 685 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr, 686 ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); 687 } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) { 688 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 689 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); 690 } 691 692 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors 693 * for the main skb fragment 694 */ 695 while (frag_len_left) { 696 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN); 697 dma_addr = pci_map_single(enic->pdev, skb->data + offset, 698 len, PCI_DMA_TODEVICE); 699 enic_queue_wq_desc_tso(wq, skb, 700 dma_addr, 701 len, 702 mss, hdr_len, 703 vlan_tag_insert, vlan_tag, 704 eop && (len == frag_len_left), loopback); 705 frag_len_left -= len; 706 offset += len; 707 } 708 709 if (eop) 710 return; 711 712 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors 713 * for additional data fragments 714 */ 715 for (frag = skb_shinfo(skb)->frags; len_left; frag++) { 716 len_left -= frag->size; 717 frag_len_left = frag->size; 718 offset = frag->page_offset; 719 720 while (frag_len_left) { 721 len = min(frag_len_left, 722 (unsigned int)WQ_ENET_MAX_DESC_LEN); 723 dma_addr = pci_map_page(enic->pdev, frag->page, 724 offset, len, 725 PCI_DMA_TODEVICE); 726 enic_queue_wq_desc_cont(wq, skb, 727 dma_addr, 728 len, 729 (len_left == 0) && 730 (len == frag_len_left), /* EOP? */ 731 loopback); 732 frag_len_left -= len; 733 offset += len; 734 } 735 } 736} 737 738static inline void enic_queue_wq_skb(struct enic *enic, 739 struct vnic_wq *wq, struct sk_buff *skb) 740{ 741 unsigned int mss = skb_shinfo(skb)->gso_size; 742 unsigned int vlan_tag = 0; 743 int vlan_tag_insert = 0; 744 int loopback = 0; 745 746 if (enic->vlan_group && vlan_tx_tag_present(skb)) { 747 /* VLAN tag from trunking driver */ 748 vlan_tag_insert = 1; 749 vlan_tag = vlan_tx_tag_get(skb); 750 } else if (enic->loop_enable) { 751 vlan_tag = enic->loop_tag; 752 loopback = 1; 753 } 754 755 if (mss) 756 enic_queue_wq_skb_tso(enic, wq, skb, mss, 757 vlan_tag_insert, vlan_tag, loopback); 758 else if (skb->ip_summed == CHECKSUM_PARTIAL) 759 enic_queue_wq_skb_csum_l4(enic, wq, skb, 760 vlan_tag_insert, vlan_tag, loopback); 761 else 762 enic_queue_wq_skb_vlan(enic, wq, skb, 763 vlan_tag_insert, vlan_tag, loopback); 764} 765 766/* netif_tx_lock held, process context with BHs disabled, or BH */ 767static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb, 768 struct net_device *netdev) 769{ 770 struct enic *enic = netdev_priv(netdev); 771 struct vnic_wq *wq = &enic->wq[0]; 772 unsigned long flags; 773 774 if (skb->len <= 0) { 775 dev_kfree_skb(skb); 776 return NETDEV_TX_OK; 777 } 778 779 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs, 780 * which is very likely. In the off chance it's going to take 781 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb. 782 */ 783 784 if (skb_shinfo(skb)->gso_size == 0 && 785 skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC && 786 skb_linearize(skb)) { 787 dev_kfree_skb(skb); 788 return NETDEV_TX_OK; 789 } 790 791 spin_lock_irqsave(&enic->wq_lock[0], flags); 792 793 if (vnic_wq_desc_avail(wq) < 794 skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) { 795 netif_stop_queue(netdev); 796 /* This is a hard error, log it */ 797 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n"); 798 spin_unlock_irqrestore(&enic->wq_lock[0], flags); 799 return NETDEV_TX_BUSY; 800 } 801 802 enic_queue_wq_skb(enic, wq, skb); 803 804 if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS) 805 netif_stop_queue(netdev); 806 807 spin_unlock_irqrestore(&enic->wq_lock[0], flags); 808 809 return NETDEV_TX_OK; 810} 811 812/* dev_base_lock rwlock held, nominally process context */ 813static struct net_device_stats *enic_get_stats(struct net_device *netdev) 814{ 815 struct enic *enic = netdev_priv(netdev); 816 struct net_device_stats *net_stats = &netdev->stats; 817 struct vnic_stats *stats; 818 819 enic_dev_stats_dump(enic, &stats); 820 821 net_stats->tx_packets = stats->tx.tx_frames_ok; 822 net_stats->tx_bytes = stats->tx.tx_bytes_ok; 823 net_stats->tx_errors = stats->tx.tx_errors; 824 net_stats->tx_dropped = stats->tx.tx_drops; 825 826 net_stats->rx_packets = stats->rx.rx_frames_ok; 827 net_stats->rx_bytes = stats->rx.rx_bytes_ok; 828 net_stats->rx_errors = stats->rx.rx_errors; 829 net_stats->multicast = stats->rx.rx_multicast_frames_ok; 830 net_stats->rx_over_errors = enic->rq_truncated_pkts; 831 net_stats->rx_crc_errors = enic->rq_bad_fcs; 832 net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop; 833 834 return net_stats; 835} 836 837static void enic_reset_multicast_list(struct enic *enic) 838{ 839 enic->mc_count = 0; 840 enic->flags = 0; 841} 842 843static int enic_set_mac_addr(struct net_device *netdev, char *addr) 844{ 845 struct enic *enic = netdev_priv(netdev); 846 847 if (enic_is_dynamic(enic)) { 848 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr)) 849 return -EADDRNOTAVAIL; 850 } else { 851 if (!is_valid_ether_addr(addr)) 852 return -EADDRNOTAVAIL; 853 } 854 855 memcpy(netdev->dev_addr, addr, netdev->addr_len); 856 857 return 0; 858} 859 860static int enic_dev_add_station_addr(struct enic *enic) 861{ 862 int err = 0; 863 864 if (is_valid_ether_addr(enic->netdev->dev_addr)) { 865 spin_lock(&enic->devcmd_lock); 866 err = vnic_dev_add_addr(enic->vdev, enic->netdev->dev_addr); 867 spin_unlock(&enic->devcmd_lock); 868 } 869 870 return err; 871} 872 873static int enic_dev_del_station_addr(struct enic *enic) 874{ 875 int err = 0; 876 877 if (is_valid_ether_addr(enic->netdev->dev_addr)) { 878 spin_lock(&enic->devcmd_lock); 879 err = vnic_dev_del_addr(enic->vdev, enic->netdev->dev_addr); 880 spin_unlock(&enic->devcmd_lock); 881 } 882 883 return err; 884} 885 886static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p) 887{ 888 struct enic *enic = netdev_priv(netdev); 889 struct sockaddr *saddr = p; 890 char *addr = saddr->sa_data; 891 int err; 892 893 if (netif_running(enic->netdev)) { 894 err = enic_dev_del_station_addr(enic); 895 if (err) 896 return err; 897 } 898 899 err = enic_set_mac_addr(netdev, addr); 900 if (err) 901 return err; 902 903 if (netif_running(enic->netdev)) { 904 err = enic_dev_add_station_addr(enic); 905 if (err) 906 return err; 907 } 908 909 return err; 910} 911 912static int enic_set_mac_address(struct net_device *netdev, void *p) 913{ 914 return -EOPNOTSUPP; 915} 916 917static int enic_dev_packet_filter(struct enic *enic, int directed, 918 int multicast, int broadcast, int promisc, int allmulti) 919{ 920 int err; 921 922 spin_lock(&enic->devcmd_lock); 923 err = vnic_dev_packet_filter(enic->vdev, directed, 924 multicast, broadcast, promisc, allmulti); 925 spin_unlock(&enic->devcmd_lock); 926 927 return err; 928} 929 930static int enic_dev_add_multicast_addr(struct enic *enic, u8 *addr) 931{ 932 int err; 933 934 spin_lock(&enic->devcmd_lock); 935 err = vnic_dev_add_addr(enic->vdev, addr); 936 spin_unlock(&enic->devcmd_lock); 937 938 return err; 939} 940 941static int enic_dev_del_multicast_addr(struct enic *enic, u8 *addr) 942{ 943 int err; 944 945 spin_lock(&enic->devcmd_lock); 946 err = vnic_dev_del_addr(enic->vdev, addr); 947 spin_unlock(&enic->devcmd_lock); 948 949 return err; 950} 951 952/* netif_tx_lock held, BHs disabled */ 953static void enic_set_multicast_list(struct net_device *netdev) 954{ 955 struct enic *enic = netdev_priv(netdev); 956 struct netdev_hw_addr *ha; 957 int directed = 1; 958 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0; 959 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0; 960 int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0; 961 unsigned int mc_count = netdev_mc_count(netdev); 962 int allmulti = (netdev->flags & IFF_ALLMULTI) || 963 mc_count > ENIC_MULTICAST_PERFECT_FILTERS; 964 unsigned int flags = netdev->flags | (allmulti ? IFF_ALLMULTI : 0); 965 u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN]; 966 unsigned int i, j; 967 968 if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) 969 mc_count = ENIC_MULTICAST_PERFECT_FILTERS; 970 971 if (enic->flags != flags) { 972 enic->flags = flags; 973 enic_dev_packet_filter(enic, directed, 974 multicast, broadcast, promisc, allmulti); 975 } 976 977 /* Is there an easier way? Trying to minimize to 978 * calls to add/del multicast addrs. We keep the 979 * addrs from the last call in enic->mc_addr and 980 * look for changes to add/del. 981 */ 982 983 i = 0; 984 netdev_for_each_mc_addr(ha, netdev) { 985 if (i == mc_count) 986 break; 987 memcpy(mc_addr[i++], ha->addr, ETH_ALEN); 988 } 989 990 for (i = 0; i < enic->mc_count; i++) { 991 for (j = 0; j < mc_count; j++) 992 if (compare_ether_addr(enic->mc_addr[i], 993 mc_addr[j]) == 0) 994 break; 995 if (j == mc_count) 996 enic_dev_del_multicast_addr(enic, enic->mc_addr[i]); 997 } 998 999 for (i = 0; i < mc_count; i++) { 1000 for (j = 0; j < enic->mc_count; j++) 1001 if (compare_ether_addr(mc_addr[i], 1002 enic->mc_addr[j]) == 0) 1003 break; 1004 if (j == enic->mc_count) 1005 enic_dev_add_multicast_addr(enic, mc_addr[i]); 1006 } 1007 1008 /* Save the list to compare against next time 1009 */ 1010 1011 for (i = 0; i < mc_count; i++) 1012 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN); 1013 1014 enic->mc_count = mc_count; 1015} 1016 1017/* rtnl lock is held */ 1018static void enic_vlan_rx_register(struct net_device *netdev, 1019 struct vlan_group *vlan_group) 1020{ 1021 struct enic *enic = netdev_priv(netdev); 1022 enic->vlan_group = vlan_group; 1023} 1024 1025/* rtnl lock is held */ 1026static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid) 1027{ 1028 struct enic *enic = netdev_priv(netdev); 1029 1030 spin_lock(&enic->devcmd_lock); 1031 enic_add_vlan(enic, vid); 1032 spin_unlock(&enic->devcmd_lock); 1033} 1034 1035/* rtnl lock is held */ 1036static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) 1037{ 1038 struct enic *enic = netdev_priv(netdev); 1039 1040 spin_lock(&enic->devcmd_lock); 1041 enic_del_vlan(enic, vid); 1042 spin_unlock(&enic->devcmd_lock); 1043} 1044 1045/* netif_tx_lock held, BHs disabled */ 1046static void enic_tx_timeout(struct net_device *netdev) 1047{ 1048 struct enic *enic = netdev_priv(netdev); 1049 schedule_work(&enic->reset); 1050} 1051 1052static int enic_vnic_dev_deinit(struct enic *enic) 1053{ 1054 int err; 1055 1056 spin_lock(&enic->devcmd_lock); 1057 err = vnic_dev_deinit(enic->vdev); 1058 spin_unlock(&enic->devcmd_lock); 1059 1060 return err; 1061} 1062 1063static int enic_dev_init_prov(struct enic *enic, struct vic_provinfo *vp) 1064{ 1065 int err; 1066 1067 spin_lock(&enic->devcmd_lock); 1068 err = vnic_dev_init_prov(enic->vdev, 1069 (u8 *)vp, vic_provinfo_size(vp)); 1070 spin_unlock(&enic->devcmd_lock); 1071 1072 return err; 1073} 1074 1075static int enic_dev_init_done(struct enic *enic, int *done, int *error) 1076{ 1077 int err; 1078 1079 spin_lock(&enic->devcmd_lock); 1080 err = vnic_dev_init_done(enic->vdev, done, error); 1081 spin_unlock(&enic->devcmd_lock); 1082 1083 return err; 1084} 1085 1086static int enic_set_port_profile(struct enic *enic, u8 *mac) 1087{ 1088 struct vic_provinfo *vp; 1089 u8 oui[3] = VIC_PROVINFO_CISCO_OUI; 1090 char uuid_str[38]; 1091 int err; 1092 1093 err = enic_vnic_dev_deinit(enic); 1094 if (err) 1095 return err; 1096 1097 switch (enic->pp.request) { 1098 1099 case PORT_REQUEST_ASSOCIATE: 1100 1101 if (!(enic->pp.set & ENIC_SET_NAME) || !strlen(enic->pp.name)) 1102 return -EINVAL; 1103 1104 if (!is_valid_ether_addr(mac)) 1105 return -EADDRNOTAVAIL; 1106 1107 vp = vic_provinfo_alloc(GFP_KERNEL, oui, 1108 VIC_PROVINFO_LINUX_TYPE); 1109 if (!vp) 1110 return -ENOMEM; 1111 1112 vic_provinfo_add_tlv(vp, 1113 VIC_LINUX_PROV_TLV_PORT_PROFILE_NAME_STR, 1114 strlen(enic->pp.name) + 1, enic->pp.name); 1115 1116 vic_provinfo_add_tlv(vp, 1117 VIC_LINUX_PROV_TLV_CLIENT_MAC_ADDR, 1118 ETH_ALEN, mac); 1119 1120 if (enic->pp.set & ENIC_SET_INSTANCE) { 1121 sprintf(uuid_str, "%pUB", enic->pp.instance_uuid); 1122 vic_provinfo_add_tlv(vp, 1123 VIC_LINUX_PROV_TLV_CLIENT_UUID_STR, 1124 sizeof(uuid_str), uuid_str); 1125 } 1126 1127 if (enic->pp.set & ENIC_SET_HOST) { 1128 sprintf(uuid_str, "%pUB", enic->pp.host_uuid); 1129 vic_provinfo_add_tlv(vp, 1130 VIC_LINUX_PROV_TLV_HOST_UUID_STR, 1131 sizeof(uuid_str), uuid_str); 1132 } 1133 1134 err = enic_dev_init_prov(enic, vp); 1135 vic_provinfo_free(vp); 1136 if (err) 1137 return err; 1138 break; 1139 1140 case PORT_REQUEST_DISASSOCIATE: 1141 break; 1142 1143 default: 1144 return -EINVAL; 1145 } 1146 1147 enic->pp.set |= ENIC_SET_APPLIED; 1148 return 0; 1149} 1150 1151static int enic_set_vf_port(struct net_device *netdev, int vf, 1152 struct nlattr *port[]) 1153{ 1154 struct enic *enic = netdev_priv(netdev); 1155 1156 memset(&enic->pp, 0, sizeof(enic->pp)); 1157 1158 if (port[IFLA_PORT_REQUEST]) { 1159 enic->pp.set |= ENIC_SET_REQUEST; 1160 enic->pp.request = nla_get_u8(port[IFLA_PORT_REQUEST]); 1161 } 1162 1163 if (port[IFLA_PORT_PROFILE]) { 1164 enic->pp.set |= ENIC_SET_NAME; 1165 memcpy(enic->pp.name, nla_data(port[IFLA_PORT_PROFILE]), 1166 PORT_PROFILE_MAX); 1167 } 1168 1169 if (port[IFLA_PORT_INSTANCE_UUID]) { 1170 enic->pp.set |= ENIC_SET_INSTANCE; 1171 memcpy(enic->pp.instance_uuid, 1172 nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX); 1173 } 1174 1175 if (port[IFLA_PORT_HOST_UUID]) { 1176 enic->pp.set |= ENIC_SET_HOST; 1177 memcpy(enic->pp.host_uuid, 1178 nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX); 1179 } 1180 1181 /* don't support VFs, yet */ 1182 if (vf != PORT_SELF_VF) 1183 return -EOPNOTSUPP; 1184 1185 if (!(enic->pp.set & ENIC_SET_REQUEST)) 1186 return -EOPNOTSUPP; 1187 1188 if (enic->pp.request == PORT_REQUEST_ASSOCIATE) { 1189 1190 /* If the interface mac addr hasn't been assigned, 1191 * assign a random mac addr before setting port- 1192 * profile. 1193 */ 1194 1195 if (is_zero_ether_addr(netdev->dev_addr)) 1196 random_ether_addr(netdev->dev_addr); 1197 } 1198 1199 return enic_set_port_profile(enic, netdev->dev_addr); 1200} 1201 1202static int enic_get_vf_port(struct net_device *netdev, int vf, 1203 struct sk_buff *skb) 1204{ 1205 struct enic *enic = netdev_priv(netdev); 1206 int err, error, done; 1207 u16 response = PORT_PROFILE_RESPONSE_SUCCESS; 1208 1209 if (!(enic->pp.set & ENIC_SET_APPLIED)) 1210 return -ENODATA; 1211 1212 err = enic_dev_init_done(enic, &done, &error); 1213 if (err) 1214 error = err; 1215 1216 switch (error) { 1217 case ERR_SUCCESS: 1218 if (!done) 1219 response = PORT_PROFILE_RESPONSE_INPROGRESS; 1220 break; 1221 case ERR_EINVAL: 1222 response = PORT_PROFILE_RESPONSE_INVALID; 1223 break; 1224 case ERR_EBADSTATE: 1225 response = PORT_PROFILE_RESPONSE_BADSTATE; 1226 break; 1227 case ERR_ENOMEM: 1228 response = PORT_PROFILE_RESPONSE_INSUFFICIENT_RESOURCES; 1229 break; 1230 default: 1231 response = PORT_PROFILE_RESPONSE_ERROR; 1232 break; 1233 } 1234 1235 NLA_PUT_U16(skb, IFLA_PORT_REQUEST, enic->pp.request); 1236 NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response); 1237 if (enic->pp.set & ENIC_SET_NAME) 1238 NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, 1239 enic->pp.name); 1240 if (enic->pp.set & ENIC_SET_INSTANCE) 1241 NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX, 1242 enic->pp.instance_uuid); 1243 if (enic->pp.set & ENIC_SET_HOST) 1244 NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, 1245 enic->pp.host_uuid); 1246 1247 return 0; 1248 1249nla_put_failure: 1250 return -EMSGSIZE; 1251} 1252 1253static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) 1254{ 1255 struct enic *enic = vnic_dev_priv(rq->vdev); 1256 1257 if (!buf->os_buf) 1258 return; 1259 1260 pci_unmap_single(enic->pdev, buf->dma_addr, 1261 buf->len, PCI_DMA_FROMDEVICE); 1262 dev_kfree_skb_any(buf->os_buf); 1263} 1264 1265static int enic_rq_alloc_buf(struct vnic_rq *rq) 1266{ 1267 struct enic *enic = vnic_dev_priv(rq->vdev); 1268 struct net_device *netdev = enic->netdev; 1269 struct sk_buff *skb; 1270 unsigned int len = netdev->mtu + VLAN_ETH_HLEN; 1271 unsigned int os_buf_index = 0; 1272 dma_addr_t dma_addr; 1273 1274 skb = netdev_alloc_skb_ip_align(netdev, len); 1275 if (!skb) 1276 return -ENOMEM; 1277 1278 dma_addr = pci_map_single(enic->pdev, skb->data, 1279 len, PCI_DMA_FROMDEVICE); 1280 1281 enic_queue_rq_desc(rq, skb, os_buf_index, 1282 dma_addr, len); 1283 1284 return 0; 1285} 1286 1287static int enic_rq_alloc_buf_a1(struct vnic_rq *rq) 1288{ 1289 struct rq_enet_desc *desc = vnic_rq_next_desc(rq); 1290 1291 if (vnic_rq_posting_soon(rq)) { 1292 1293 1294 rq_enet_desc_enc(desc, 0, RQ_ENET_TYPE_RESV2, 0); 1295 vnic_rq_post(rq, 0, 0, 0, 0); 1296 } else { 1297 return enic_rq_alloc_buf(rq); 1298 } 1299 1300 return 0; 1301} 1302 1303static int enic_dev_hw_version(struct enic *enic, 1304 enum vnic_dev_hw_version *hw_ver) 1305{ 1306 int err; 1307 1308 spin_lock(&enic->devcmd_lock); 1309 err = vnic_dev_hw_version(enic->vdev, hw_ver); 1310 spin_unlock(&enic->devcmd_lock); 1311 1312 return err; 1313} 1314 1315static int enic_set_rq_alloc_buf(struct enic *enic) 1316{ 1317 enum vnic_dev_hw_version hw_ver; 1318 int err; 1319 1320 err = enic_dev_hw_version(enic, &hw_ver); 1321 if (err) 1322 return err; 1323 1324 switch (hw_ver) { 1325 case VNIC_DEV_HW_VER_A1: 1326 enic->rq_alloc_buf = enic_rq_alloc_buf_a1; 1327 break; 1328 case VNIC_DEV_HW_VER_A2: 1329 case VNIC_DEV_HW_VER_UNKNOWN: 1330 enic->rq_alloc_buf = enic_rq_alloc_buf; 1331 break; 1332 default: 1333 return -ENODEV; 1334 } 1335 1336 return 0; 1337} 1338 1339static void enic_rq_indicate_buf(struct vnic_rq *rq, 1340 struct cq_desc *cq_desc, struct vnic_rq_buf *buf, 1341 int skipped, void *opaque) 1342{ 1343 struct enic *enic = vnic_dev_priv(rq->vdev); 1344 struct net_device *netdev = enic->netdev; 1345 struct sk_buff *skb; 1346 1347 u8 type, color, eop, sop, ingress_port, vlan_stripped; 1348 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof; 1349 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; 1350 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc; 1351 u8 packet_error; 1352 u16 q_number, completed_index, bytes_written, vlan_tci, checksum; 1353 u32 rss_hash; 1354 1355 if (skipped) 1356 return; 1357 1358 skb = buf->os_buf; 1359 prefetch(skb->data - NET_IP_ALIGN); 1360 pci_unmap_single(enic->pdev, buf->dma_addr, 1361 buf->len, PCI_DMA_FROMDEVICE); 1362 1363 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, 1364 &type, &color, &q_number, &completed_index, 1365 &ingress_port, &fcoe, &eop, &sop, &rss_type, 1366 &csum_not_calc, &rss_hash, &bytes_written, 1367 &packet_error, &vlan_stripped, &vlan_tci, &checksum, 1368 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error, 1369 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp, 1370 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment, 1371 &fcs_ok); 1372 1373 if (packet_error) { 1374 1375 if (!fcs_ok) { 1376 if (bytes_written > 0) 1377 enic->rq_bad_fcs++; 1378 else if (bytes_written == 0) 1379 enic->rq_truncated_pkts++; 1380 } 1381 1382 dev_kfree_skb_any(skb); 1383 1384 return; 1385 } 1386 1387 if (eop && bytes_written > 0) { 1388 1389 /* Good receive 1390 */ 1391 1392 skb_put(skb, bytes_written); 1393 skb->protocol = eth_type_trans(skb, netdev); 1394 1395 if (enic->csum_rx_enabled && !csum_not_calc) { 1396 skb->csum = htons(checksum); 1397 skb->ip_summed = CHECKSUM_COMPLETE; 1398 } 1399 1400 skb->dev = netdev; 1401 1402 if (enic->vlan_group && vlan_stripped && 1403 (vlan_tci & CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_MASK)) { 1404 1405 if (netdev->features & NETIF_F_GRO) 1406 vlan_gro_receive(&enic->napi, enic->vlan_group, 1407 vlan_tci, skb); 1408 else 1409 vlan_hwaccel_receive_skb(skb, 1410 enic->vlan_group, vlan_tci); 1411 1412 } else { 1413 1414 if (netdev->features & NETIF_F_GRO) 1415 napi_gro_receive(&enic->napi, skb); 1416 else 1417 netif_receive_skb(skb); 1418 1419 } 1420 1421 } else { 1422 1423 /* Buffer overflow 1424 */ 1425 1426 dev_kfree_skb_any(skb); 1427 } 1428} 1429 1430static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, 1431 u8 type, u16 q_number, u16 completed_index, void *opaque) 1432{ 1433 struct enic *enic = vnic_dev_priv(vdev); 1434 1435 vnic_rq_service(&enic->rq[q_number], cq_desc, 1436 completed_index, VNIC_RQ_RETURN_DESC, 1437 enic_rq_indicate_buf, opaque); 1438 1439 return 0; 1440} 1441 1442static int enic_poll(struct napi_struct *napi, int budget) 1443{ 1444 struct enic *enic = container_of(napi, struct enic, napi); 1445 unsigned int rq_work_to_do = budget; 1446 unsigned int wq_work_to_do = -1; /* no limit */ 1447 unsigned int work_done, rq_work_done, wq_work_done; 1448 int err; 1449 1450 /* Service RQ (first) and WQ 1451 */ 1452 1453 rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ], 1454 rq_work_to_do, enic_rq_service, NULL); 1455 1456 wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ], 1457 wq_work_to_do, enic_wq_service, NULL); 1458 1459 /* Accumulate intr event credits for this polling 1460 * cycle. An intr event is the completion of a 1461 * a WQ or RQ packet. 1462 */ 1463 1464 work_done = rq_work_done + wq_work_done; 1465 1466 if (work_done > 0) 1467 vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ], 1468 work_done, 1469 0 /* don't unmask intr */, 1470 0 /* don't reset intr timer */); 1471 1472 err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf); 1473 1474 /* Buffer allocation failed. Stay in polling 1475 * mode so we can try to fill the ring again. 1476 */ 1477 1478 if (err) 1479 rq_work_done = rq_work_to_do; 1480 1481 if (rq_work_done < rq_work_to_do) { 1482 1483 /* Some work done, but not enough to stay in polling, 1484 * exit polling 1485 */ 1486 1487 napi_complete(napi); 1488 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]); 1489 } 1490 1491 return rq_work_done; 1492} 1493 1494static int enic_poll_msix(struct napi_struct *napi, int budget) 1495{ 1496 struct enic *enic = container_of(napi, struct enic, napi); 1497 unsigned int work_to_do = budget; 1498 unsigned int work_done; 1499 int err; 1500 1501 /* Service RQ 1502 */ 1503 1504 work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ], 1505 work_to_do, enic_rq_service, NULL); 1506 1507 /* Return intr event credits for this polling 1508 * cycle. An intr event is the completion of a 1509 * RQ packet. 1510 */ 1511 1512 if (work_done > 0) 1513 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ], 1514 work_done, 1515 0 /* don't unmask intr */, 1516 0 /* don't reset intr timer */); 1517 1518 err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf); 1519 1520 /* Buffer allocation failed. Stay in polling mode 1521 * so we can try to fill the ring again. 1522 */ 1523 1524 if (err) 1525 work_done = work_to_do; 1526 1527 if (work_done < work_to_do) { 1528 1529 /* Some work done, but not enough to stay in polling, 1530 * exit polling 1531 */ 1532 1533 napi_complete(napi); 1534 vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]); 1535 } 1536 1537 return work_done; 1538} 1539 1540static void enic_notify_timer(unsigned long data) 1541{ 1542 struct enic *enic = (struct enic *)data; 1543 1544 enic_notify_check(enic); 1545 1546 mod_timer(&enic->notify_timer, 1547 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD)); 1548} 1549 1550static void enic_free_intr(struct enic *enic) 1551{ 1552 struct net_device *netdev = enic->netdev; 1553 unsigned int i; 1554 1555 switch (vnic_dev_get_intr_mode(enic->vdev)) { 1556 case VNIC_DEV_INTR_MODE_INTX: 1557 free_irq(enic->pdev->irq, netdev); 1558 break; 1559 case VNIC_DEV_INTR_MODE_MSI: 1560 free_irq(enic->pdev->irq, enic); 1561 break; 1562 case VNIC_DEV_INTR_MODE_MSIX: 1563 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) 1564 if (enic->msix[i].requested) 1565 free_irq(enic->msix_entry[i].vector, 1566 enic->msix[i].devid); 1567 break; 1568 default: 1569 break; 1570 } 1571} 1572 1573static int enic_request_intr(struct enic *enic) 1574{ 1575 struct net_device *netdev = enic->netdev; 1576 unsigned int i; 1577 int err = 0; 1578 1579 switch (vnic_dev_get_intr_mode(enic->vdev)) { 1580 1581 case VNIC_DEV_INTR_MODE_INTX: 1582 1583 err = request_irq(enic->pdev->irq, enic_isr_legacy, 1584 IRQF_SHARED, netdev->name, netdev); 1585 break; 1586 1587 case VNIC_DEV_INTR_MODE_MSI: 1588 1589 err = request_irq(enic->pdev->irq, enic_isr_msi, 1590 0, netdev->name, enic); 1591 break; 1592 1593 case VNIC_DEV_INTR_MODE_MSIX: 1594 1595 sprintf(enic->msix[ENIC_MSIX_RQ].devname, 1596 "%.11s-rx-0", netdev->name); 1597 enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq; 1598 enic->msix[ENIC_MSIX_RQ].devid = enic; 1599 1600 sprintf(enic->msix[ENIC_MSIX_WQ].devname, 1601 "%.11s-tx-0", netdev->name); 1602 enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq; 1603 enic->msix[ENIC_MSIX_WQ].devid = enic; 1604 1605 sprintf(enic->msix[ENIC_MSIX_ERR].devname, 1606 "%.11s-err", netdev->name); 1607 enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err; 1608 enic->msix[ENIC_MSIX_ERR].devid = enic; 1609 1610 sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname, 1611 "%.11s-notify", netdev->name); 1612 enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify; 1613 enic->msix[ENIC_MSIX_NOTIFY].devid = enic; 1614 1615 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) { 1616 err = request_irq(enic->msix_entry[i].vector, 1617 enic->msix[i].isr, 0, 1618 enic->msix[i].devname, 1619 enic->msix[i].devid); 1620 if (err) { 1621 enic_free_intr(enic); 1622 break; 1623 } 1624 enic->msix[i].requested = 1; 1625 } 1626 1627 break; 1628 1629 default: 1630 break; 1631 } 1632 1633 return err; 1634} 1635 1636static void enic_synchronize_irqs(struct enic *enic) 1637{ 1638 unsigned int i; 1639 1640 switch (vnic_dev_get_intr_mode(enic->vdev)) { 1641 case VNIC_DEV_INTR_MODE_INTX: 1642 case VNIC_DEV_INTR_MODE_MSI: 1643 synchronize_irq(enic->pdev->irq); 1644 break; 1645 case VNIC_DEV_INTR_MODE_MSIX: 1646 for (i = 0; i < enic->intr_count; i++) 1647 synchronize_irq(enic->msix_entry[i].vector); 1648 break; 1649 default: 1650 break; 1651 } 1652} 1653 1654static int enic_dev_notify_set(struct enic *enic) 1655{ 1656 int err; 1657 1658 spin_lock(&enic->devcmd_lock); 1659 switch (vnic_dev_get_intr_mode(enic->vdev)) { 1660 case VNIC_DEV_INTR_MODE_INTX: 1661 err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY); 1662 break; 1663 case VNIC_DEV_INTR_MODE_MSIX: 1664 err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY); 1665 break; 1666 default: 1667 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */); 1668 break; 1669 } 1670 spin_unlock(&enic->devcmd_lock); 1671 1672 return err; 1673} 1674 1675static int enic_dev_notify_unset(struct enic *enic) 1676{ 1677 int err; 1678 1679 spin_lock(&enic->devcmd_lock); 1680 err = vnic_dev_notify_unset(enic->vdev); 1681 spin_unlock(&enic->devcmd_lock); 1682 1683 return err; 1684} 1685 1686static int enic_dev_enable(struct enic *enic) 1687{ 1688 int err; 1689 1690 spin_lock(&enic->devcmd_lock); 1691 err = vnic_dev_enable(enic->vdev); 1692 spin_unlock(&enic->devcmd_lock); 1693 1694 return err; 1695} 1696 1697static int enic_dev_disable(struct enic *enic) 1698{ 1699 int err; 1700 1701 spin_lock(&enic->devcmd_lock); 1702 err = vnic_dev_disable(enic->vdev); 1703 spin_unlock(&enic->devcmd_lock); 1704 1705 return err; 1706} 1707 1708static void enic_notify_timer_start(struct enic *enic) 1709{ 1710 switch (vnic_dev_get_intr_mode(enic->vdev)) { 1711 case VNIC_DEV_INTR_MODE_MSI: 1712 mod_timer(&enic->notify_timer, jiffies); 1713 break; 1714 default: 1715 /* Using intr for notification for INTx/MSI-X */ 1716 break; 1717 }; 1718} 1719 1720/* rtnl lock is held, process context */ 1721static int enic_open(struct net_device *netdev) 1722{ 1723 struct enic *enic = netdev_priv(netdev); 1724 unsigned int i; 1725 int err; 1726 1727 err = enic_request_intr(enic); 1728 if (err) { 1729 netdev_err(netdev, "Unable to request irq.\n"); 1730 return err; 1731 } 1732 1733 err = enic_dev_notify_set(enic); 1734 if (err) { 1735 netdev_err(netdev, 1736 "Failed to alloc notify buffer, aborting.\n"); 1737 goto err_out_free_intr; 1738 } 1739 1740 for (i = 0; i < enic->rq_count; i++) { 1741 vnic_rq_fill(&enic->rq[i], enic->rq_alloc_buf); 1742 /* Need at least one buffer on ring to get going */ 1743 if (vnic_rq_desc_used(&enic->rq[i]) == 0) { 1744 netdev_err(netdev, "Unable to alloc receive buffers\n"); 1745 err = -ENOMEM; 1746 goto err_out_notify_unset; 1747 } 1748 } 1749 1750 for (i = 0; i < enic->wq_count; i++) 1751 vnic_wq_enable(&enic->wq[i]); 1752 for (i = 0; i < enic->rq_count; i++) 1753 vnic_rq_enable(&enic->rq[i]); 1754 1755 enic_dev_add_station_addr(enic); 1756 enic_set_multicast_list(netdev); 1757 1758 netif_wake_queue(netdev); 1759 napi_enable(&enic->napi); 1760 enic_dev_enable(enic); 1761 1762 for (i = 0; i < enic->intr_count; i++) 1763 vnic_intr_unmask(&enic->intr[i]); 1764 1765 enic_notify_timer_start(enic); 1766 1767 return 0; 1768 1769err_out_notify_unset: 1770 enic_dev_notify_unset(enic); 1771err_out_free_intr: 1772 enic_free_intr(enic); 1773 1774 return err; 1775} 1776 1777/* rtnl lock is held, process context */ 1778static int enic_stop(struct net_device *netdev) 1779{ 1780 struct enic *enic = netdev_priv(netdev); 1781 unsigned int i; 1782 int err; 1783 1784 for (i = 0; i < enic->intr_count; i++) { 1785 vnic_intr_mask(&enic->intr[i]); 1786 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */ 1787 } 1788 1789 enic_synchronize_irqs(enic); 1790 1791 del_timer_sync(&enic->notify_timer); 1792 1793 enic_dev_disable(enic); 1794 napi_disable(&enic->napi); 1795 netif_carrier_off(netdev); 1796 netif_tx_disable(netdev); 1797 enic_dev_del_station_addr(enic); 1798 1799 for (i = 0; i < enic->wq_count; i++) { 1800 err = vnic_wq_disable(&enic->wq[i]); 1801 if (err) 1802 return err; 1803 } 1804 for (i = 0; i < enic->rq_count; i++) { 1805 err = vnic_rq_disable(&enic->rq[i]); 1806 if (err) 1807 return err; 1808 } 1809 1810 enic_dev_notify_unset(enic); 1811 enic_free_intr(enic); 1812 1813 for (i = 0; i < enic->wq_count; i++) 1814 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf); 1815 for (i = 0; i < enic->rq_count; i++) 1816 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); 1817 for (i = 0; i < enic->cq_count; i++) 1818 vnic_cq_clean(&enic->cq[i]); 1819 for (i = 0; i < enic->intr_count; i++) 1820 vnic_intr_clean(&enic->intr[i]); 1821 1822 return 0; 1823} 1824 1825static int enic_change_mtu(struct net_device *netdev, int new_mtu) 1826{ 1827 struct enic *enic = netdev_priv(netdev); 1828 int running = netif_running(netdev); 1829 1830 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU) 1831 return -EINVAL; 1832 1833 if (running) 1834 enic_stop(netdev); 1835 1836 netdev->mtu = new_mtu; 1837 1838 if (netdev->mtu > enic->port_mtu) 1839 netdev_warn(netdev, 1840 "interface MTU (%d) set higher than port MTU (%d)\n", 1841 netdev->mtu, enic->port_mtu); 1842 1843 if (running) 1844 enic_open(netdev); 1845 1846 return 0; 1847} 1848 1849#ifdef CONFIG_NET_POLL_CONTROLLER 1850static void enic_poll_controller(struct net_device *netdev) 1851{ 1852 struct enic *enic = netdev_priv(netdev); 1853 struct vnic_dev *vdev = enic->vdev; 1854 1855 switch (vnic_dev_get_intr_mode(vdev)) { 1856 case VNIC_DEV_INTR_MODE_MSIX: 1857 enic_isr_msix_rq(enic->pdev->irq, enic); 1858 enic_isr_msix_wq(enic->pdev->irq, enic); 1859 break; 1860 case VNIC_DEV_INTR_MODE_MSI: 1861 enic_isr_msi(enic->pdev->irq, enic); 1862 break; 1863 case VNIC_DEV_INTR_MODE_INTX: 1864 enic_isr_legacy(enic->pdev->irq, netdev); 1865 break; 1866 default: 1867 break; 1868 } 1869} 1870#endif 1871 1872static int enic_dev_wait(struct vnic_dev *vdev, 1873 int (*start)(struct vnic_dev *, int), 1874 int (*finished)(struct vnic_dev *, int *), 1875 int arg) 1876{ 1877 unsigned long time; 1878 int done; 1879 int err; 1880 1881 BUG_ON(in_interrupt()); 1882 1883 err = start(vdev, arg); 1884 if (err) 1885 return err; 1886 1887 /* Wait for func to complete...2 seconds max 1888 */ 1889 1890 time = jiffies + (HZ * 2); 1891 do { 1892 1893 err = finished(vdev, &done); 1894 if (err) 1895 return err; 1896 1897 if (done) 1898 return 0; 1899 1900 schedule_timeout_uninterruptible(HZ / 10); 1901 1902 } while (time_after(time, jiffies)); 1903 1904 return -ETIMEDOUT; 1905} 1906 1907static int enic_dev_open(struct enic *enic) 1908{ 1909 int err; 1910 1911 err = enic_dev_wait(enic->vdev, vnic_dev_open, 1912 vnic_dev_open_done, 0); 1913 if (err) 1914 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n", 1915 err); 1916 1917 return err; 1918} 1919 1920static int enic_dev_hang_reset(struct enic *enic) 1921{ 1922 int err; 1923 1924 err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset, 1925 vnic_dev_hang_reset_done, 0); 1926 if (err) 1927 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n", 1928 err); 1929 1930 return err; 1931} 1932 1933static int enic_set_niccfg(struct enic *enic) 1934{ 1935 const u8 rss_default_cpu = 0; 1936 const u8 rss_hash_type = 0; 1937 const u8 rss_hash_bits = 0; 1938 const u8 rss_base_cpu = 0; 1939 const u8 rss_enable = 0; 1940 const u8 tso_ipid_split_en = 0; 1941 const u8 ig_vlan_strip_en = 1; 1942 int err; 1943 1944 /* Enable VLAN tag stripping. RSS not enabled (yet). 1945 */ 1946 1947 spin_lock(&enic->devcmd_lock); 1948 err = enic_set_nic_cfg(enic, 1949 rss_default_cpu, rss_hash_type, 1950 rss_hash_bits, rss_base_cpu, 1951 rss_enable, tso_ipid_split_en, 1952 ig_vlan_strip_en); 1953 spin_unlock(&enic->devcmd_lock); 1954 1955 return err; 1956} 1957 1958static int enic_dev_hang_notify(struct enic *enic) 1959{ 1960 int err; 1961 1962 spin_lock(&enic->devcmd_lock); 1963 err = vnic_dev_hang_notify(enic->vdev); 1964 spin_unlock(&enic->devcmd_lock); 1965 1966 return err; 1967} 1968 1969int enic_dev_set_ig_vlan_rewrite_mode(struct enic *enic) 1970{ 1971 int err; 1972 1973 spin_lock(&enic->devcmd_lock); 1974 err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev, 1975 IG_VLAN_REWRITE_MODE_PRIORITY_TAG_DEFAULT_VLAN); 1976 spin_unlock(&enic->devcmd_lock); 1977 1978 return err; 1979} 1980 1981static void enic_reset(struct work_struct *work) 1982{ 1983 struct enic *enic = container_of(work, struct enic, reset); 1984 1985 if (!netif_running(enic->netdev)) 1986 return; 1987 1988 rtnl_lock(); 1989 1990 enic_dev_hang_notify(enic); 1991 enic_stop(enic->netdev); 1992 enic_dev_hang_reset(enic); 1993 enic_reset_multicast_list(enic); 1994 enic_init_vnic_resources(enic); 1995 enic_set_niccfg(enic); 1996 enic_dev_set_ig_vlan_rewrite_mode(enic); 1997 enic_open(enic->netdev); 1998 1999 rtnl_unlock(); 2000} 2001 2002static int enic_set_intr_mode(struct enic *enic) 2003{ 2004 unsigned int n = 1; 2005 unsigned int m = 1; 2006 unsigned int i; 2007 2008 /* Set interrupt mode (INTx, MSI, MSI-X) depending 2009 * system capabilities. 2010 * 2011 * Try MSI-X first 2012 * 2013 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs 2014 * (the second to last INTR is used for WQ/RQ errors) 2015 * (the last INTR is used for notifications) 2016 */ 2017 2018 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2); 2019 for (i = 0; i < n + m + 2; i++) 2020 enic->msix_entry[i].entry = i; 2021 2022 if (enic->config.intr_mode < 1 && 2023 enic->rq_count >= n && 2024 enic->wq_count >= m && 2025 enic->cq_count >= n + m && 2026 enic->intr_count >= n + m + 2 && 2027 !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) { 2028 2029 enic->rq_count = n; 2030 enic->wq_count = m; 2031 enic->cq_count = n + m; 2032 enic->intr_count = n + m + 2; 2033 2034 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX); 2035 2036 return 0; 2037 } 2038 2039 /* Next try MSI 2040 * 2041 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR 2042 */ 2043 2044 if (enic->config.intr_mode < 2 && 2045 enic->rq_count >= 1 && 2046 enic->wq_count >= 1 && 2047 enic->cq_count >= 2 && 2048 enic->intr_count >= 1 && 2049 !pci_enable_msi(enic->pdev)) { 2050 2051 enic->rq_count = 1; 2052 enic->wq_count = 1; 2053 enic->cq_count = 2; 2054 enic->intr_count = 1; 2055 2056 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI); 2057 2058 return 0; 2059 } 2060 2061 /* Next try INTx 2062 * 2063 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs 2064 * (the first INTR is used for WQ/RQ) 2065 * (the second INTR is used for WQ/RQ errors) 2066 * (the last INTR is used for notifications) 2067 */ 2068 2069 if (enic->config.intr_mode < 3 && 2070 enic->rq_count >= 1 && 2071 enic->wq_count >= 1 && 2072 enic->cq_count >= 2 && 2073 enic->intr_count >= 3) { 2074 2075 enic->rq_count = 1; 2076 enic->wq_count = 1; 2077 enic->cq_count = 2; 2078 enic->intr_count = 3; 2079 2080 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX); 2081 2082 return 0; 2083 } 2084 2085 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2086 2087 return -EINVAL; 2088} 2089 2090static void enic_clear_intr_mode(struct enic *enic) 2091{ 2092 switch (vnic_dev_get_intr_mode(enic->vdev)) { 2093 case VNIC_DEV_INTR_MODE_MSIX: 2094 pci_disable_msix(enic->pdev); 2095 break; 2096 case VNIC_DEV_INTR_MODE_MSI: 2097 pci_disable_msi(enic->pdev); 2098 break; 2099 default: 2100 break; 2101 } 2102 2103 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2104} 2105 2106static const struct net_device_ops enic_netdev_dynamic_ops = { 2107 .ndo_open = enic_open, 2108 .ndo_stop = enic_stop, 2109 .ndo_start_xmit = enic_hard_start_xmit, 2110 .ndo_get_stats = enic_get_stats, 2111 .ndo_validate_addr = eth_validate_addr, 2112 .ndo_set_multicast_list = enic_set_multicast_list, 2113 .ndo_set_mac_address = enic_set_mac_address_dynamic, 2114 .ndo_change_mtu = enic_change_mtu, 2115 .ndo_vlan_rx_register = enic_vlan_rx_register, 2116 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2117 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2118 .ndo_tx_timeout = enic_tx_timeout, 2119 .ndo_set_vf_port = enic_set_vf_port, 2120 .ndo_get_vf_port = enic_get_vf_port, 2121#ifdef CONFIG_NET_POLL_CONTROLLER 2122 .ndo_poll_controller = enic_poll_controller, 2123#endif 2124}; 2125 2126static const struct net_device_ops enic_netdev_ops = { 2127 .ndo_open = enic_open, 2128 .ndo_stop = enic_stop, 2129 .ndo_start_xmit = enic_hard_start_xmit, 2130 .ndo_get_stats = enic_get_stats, 2131 .ndo_validate_addr = eth_validate_addr, 2132 .ndo_set_mac_address = enic_set_mac_address, 2133 .ndo_set_multicast_list = enic_set_multicast_list, 2134 .ndo_change_mtu = enic_change_mtu, 2135 .ndo_vlan_rx_register = enic_vlan_rx_register, 2136 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2137 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2138 .ndo_tx_timeout = enic_tx_timeout, 2139#ifdef CONFIG_NET_POLL_CONTROLLER 2140 .ndo_poll_controller = enic_poll_controller, 2141#endif 2142}; 2143 2144void enic_dev_deinit(struct enic *enic) 2145{ 2146 netif_napi_del(&enic->napi); 2147 enic_free_vnic_resources(enic); 2148 enic_clear_intr_mode(enic); 2149} 2150 2151static int enic_dev_stats_clear(struct enic *enic) 2152{ 2153 int err; 2154 2155 spin_lock(&enic->devcmd_lock); 2156 err = vnic_dev_stats_clear(enic->vdev); 2157 spin_unlock(&enic->devcmd_lock); 2158 2159 return err; 2160} 2161 2162int enic_dev_init(struct enic *enic) 2163{ 2164 struct device *dev = enic_get_dev(enic); 2165 struct net_device *netdev = enic->netdev; 2166 int err; 2167 2168 /* Get vNIC configuration 2169 */ 2170 2171 err = enic_get_vnic_config(enic); 2172 if (err) { 2173 dev_err(dev, "Get vNIC configuration failed, aborting\n"); 2174 return err; 2175 } 2176 2177 /* Get available resource counts 2178 */ 2179 2180 enic_get_res_counts(enic); 2181 2182 /* Set interrupt mode based on resource counts and system 2183 * capabilities 2184 */ 2185 2186 err = enic_set_intr_mode(enic); 2187 if (err) { 2188 dev_err(dev, "Failed to set intr mode based on resource " 2189 "counts and system capabilities, aborting\n"); 2190 return err; 2191 } 2192 2193 /* Allocate and configure vNIC resources 2194 */ 2195 2196 err = enic_alloc_vnic_resources(enic); 2197 if (err) { 2198 dev_err(dev, "Failed to alloc vNIC resources, aborting\n"); 2199 goto err_out_free_vnic_resources; 2200 } 2201 2202 enic_init_vnic_resources(enic); 2203 2204 /* Clear LIF stats 2205 */ 2206 enic_dev_stats_clear(enic); 2207 2208 err = enic_set_rq_alloc_buf(enic); 2209 if (err) { 2210 dev_err(dev, "Failed to set RQ buffer allocator, aborting\n"); 2211 goto err_out_free_vnic_resources; 2212 } 2213 2214 err = enic_set_niccfg(enic); 2215 if (err) { 2216 dev_err(dev, "Failed to config nic, aborting\n"); 2217 goto err_out_free_vnic_resources; 2218 } 2219 2220 err = enic_dev_set_ig_vlan_rewrite_mode(enic); 2221 if (err) { 2222 netdev_err(netdev, 2223 "Failed to set ingress vlan rewrite mode, aborting.\n"); 2224 goto err_out_free_vnic_resources; 2225 } 2226 2227 switch (vnic_dev_get_intr_mode(enic->vdev)) { 2228 default: 2229 netif_napi_add(netdev, &enic->napi, enic_poll, 64); 2230 break; 2231 case VNIC_DEV_INTR_MODE_MSIX: 2232 netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64); 2233 break; 2234 } 2235 2236 return 0; 2237 2238err_out_free_vnic_resources: 2239 enic_clear_intr_mode(enic); 2240 enic_free_vnic_resources(enic); 2241 2242 return err; 2243} 2244 2245static void enic_iounmap(struct enic *enic) 2246{ 2247 unsigned int i; 2248 2249 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) 2250 if (enic->bar[i].vaddr) 2251 iounmap(enic->bar[i].vaddr); 2252} 2253 2254static int __devinit enic_probe(struct pci_dev *pdev, 2255 const struct pci_device_id *ent) 2256{ 2257 struct device *dev = &pdev->dev; 2258 struct net_device *netdev; 2259 struct enic *enic; 2260 int using_dac = 0; 2261 unsigned int i; 2262 int err; 2263 2264 /* Allocate net device structure and initialize. Private 2265 * instance data is initialized to zero. 2266 */ 2267 2268 netdev = alloc_etherdev(sizeof(struct enic)); 2269 if (!netdev) { 2270 pr_err("Etherdev alloc failed, aborting\n"); 2271 return -ENOMEM; 2272 } 2273 2274 pci_set_drvdata(pdev, netdev); 2275 2276 SET_NETDEV_DEV(netdev, &pdev->dev); 2277 2278 enic = netdev_priv(netdev); 2279 enic->netdev = netdev; 2280 enic->pdev = pdev; 2281 2282 /* Setup PCI resources 2283 */ 2284 2285 err = pci_enable_device_mem(pdev); 2286 if (err) { 2287 dev_err(dev, "Cannot enable PCI device, aborting\n"); 2288 goto err_out_free_netdev; 2289 } 2290 2291 err = pci_request_regions(pdev, DRV_NAME); 2292 if (err) { 2293 dev_err(dev, "Cannot request PCI regions, aborting\n"); 2294 goto err_out_disable_device; 2295 } 2296 2297 pci_set_master(pdev); 2298 2299 /* Query PCI controller on system for DMA addressing 2300 * limitation for the device. Try 40-bit first, and 2301 * fail to 32-bit. 2302 */ 2303 2304 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40)); 2305 if (err) { 2306 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 2307 if (err) { 2308 dev_err(dev, "No usable DMA configuration, aborting\n"); 2309 goto err_out_release_regions; 2310 } 2311 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 2312 if (err) { 2313 dev_err(dev, "Unable to obtain %u-bit DMA " 2314 "for consistent allocations, aborting\n", 32); 2315 goto err_out_release_regions; 2316 } 2317 } else { 2318 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40)); 2319 if (err) { 2320 dev_err(dev, "Unable to obtain %u-bit DMA " 2321 "for consistent allocations, aborting\n", 40); 2322 goto err_out_release_regions; 2323 } 2324 using_dac = 1; 2325 } 2326 2327 /* Map vNIC resources from BAR0-5 2328 */ 2329 2330 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) { 2331 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM)) 2332 continue; 2333 enic->bar[i].len = pci_resource_len(pdev, i); 2334 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len); 2335 if (!enic->bar[i].vaddr) { 2336 dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i); 2337 err = -ENODEV; 2338 goto err_out_iounmap; 2339 } 2340 enic->bar[i].bus_addr = pci_resource_start(pdev, i); 2341 } 2342 2343 /* Register vNIC device 2344 */ 2345 2346 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar, 2347 ARRAY_SIZE(enic->bar)); 2348 if (!enic->vdev) { 2349 dev_err(dev, "vNIC registration failed, aborting\n"); 2350 err = -ENODEV; 2351 goto err_out_iounmap; 2352 } 2353 2354 /* Issue device open to get device in known state 2355 */ 2356 2357 err = enic_dev_open(enic); 2358 if (err) { 2359 dev_err(dev, "vNIC dev open failed, aborting\n"); 2360 goto err_out_vnic_unregister; 2361 } 2362 2363 /* Issue device init to initialize the vnic-to-switch link. 2364 * We'll start with carrier off and wait for link UP 2365 * notification later to turn on carrier. We don't need 2366 * to wait here for the vnic-to-switch link initialization 2367 * to complete; link UP notification is the indication that 2368 * the process is complete. 2369 */ 2370 2371 netif_carrier_off(netdev); 2372 2373 /* Do not call dev_init for a dynamic vnic. 2374 * For a dynamic vnic, init_prov_info will be 2375 * called later by an upper layer. 2376 */ 2377 2378 if (!enic_is_dynamic(enic)) { 2379 err = vnic_dev_init(enic->vdev, 0); 2380 if (err) { 2381 dev_err(dev, "vNIC dev init failed, aborting\n"); 2382 goto err_out_dev_close; 2383 } 2384 } 2385 2386 /* Setup devcmd lock 2387 */ 2388 2389 spin_lock_init(&enic->devcmd_lock); 2390 2391 err = enic_dev_init(enic); 2392 if (err) { 2393 dev_err(dev, "Device initialization failed, aborting\n"); 2394 goto err_out_dev_close; 2395 } 2396 2397 /* Setup notification timer, HW reset task, and wq locks 2398 */ 2399 2400 init_timer(&enic->notify_timer); 2401 enic->notify_timer.function = enic_notify_timer; 2402 enic->notify_timer.data = (unsigned long)enic; 2403 2404 INIT_WORK(&enic->reset, enic_reset); 2405 2406 for (i = 0; i < enic->wq_count; i++) 2407 spin_lock_init(&enic->wq_lock[i]); 2408 2409 /* Register net device 2410 */ 2411 2412 enic->port_mtu = enic->config.mtu; 2413 (void)enic_change_mtu(netdev, enic->port_mtu); 2414 2415 err = enic_set_mac_addr(netdev, enic->mac_addr); 2416 if (err) { 2417 dev_err(dev, "Invalid MAC address, aborting\n"); 2418 goto err_out_dev_deinit; 2419 } 2420 2421 enic->tx_coalesce_usecs = enic->config.intr_timer_usec; 2422 enic->rx_coalesce_usecs = enic->tx_coalesce_usecs; 2423 2424 if (enic_is_dynamic(enic)) 2425 netdev->netdev_ops = &enic_netdev_dynamic_ops; 2426 else 2427 netdev->netdev_ops = &enic_netdev_ops; 2428 2429 netdev->watchdog_timeo = 2 * HZ; 2430 netdev->ethtool_ops = &enic_ethtool_ops; 2431 2432 netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; 2433 if (ENIC_SETTING(enic, LOOP)) { 2434 netdev->features &= ~NETIF_F_HW_VLAN_TX; 2435 enic->loop_enable = 1; 2436 enic->loop_tag = enic->config.loop_tag; 2437 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag); 2438 } 2439 if (ENIC_SETTING(enic, TXCSUM)) 2440 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; 2441 if (ENIC_SETTING(enic, TSO)) 2442 netdev->features |= NETIF_F_TSO | 2443 NETIF_F_TSO6 | NETIF_F_TSO_ECN; 2444 if (ENIC_SETTING(enic, LRO)) 2445 netdev->features |= NETIF_F_GRO; 2446 if (using_dac) 2447 netdev->features |= NETIF_F_HIGHDMA; 2448 2449 enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM); 2450 2451 err = register_netdev(netdev); 2452 if (err) { 2453 dev_err(dev, "Cannot register net device, aborting\n"); 2454 goto err_out_dev_deinit; 2455 } 2456 2457 return 0; 2458 2459err_out_dev_deinit: 2460 enic_dev_deinit(enic); 2461err_out_dev_close: 2462 vnic_dev_close(enic->vdev); 2463err_out_vnic_unregister: 2464 vnic_dev_unregister(enic->vdev); 2465err_out_iounmap: 2466 enic_iounmap(enic); 2467err_out_release_regions: 2468 pci_release_regions(pdev); 2469err_out_disable_device: 2470 pci_disable_device(pdev); 2471err_out_free_netdev: 2472 pci_set_drvdata(pdev, NULL); 2473 free_netdev(netdev); 2474 2475 return err; 2476} 2477 2478static void __devexit enic_remove(struct pci_dev *pdev) 2479{ 2480 struct net_device *netdev = pci_get_drvdata(pdev); 2481 2482 if (netdev) { 2483 struct enic *enic = netdev_priv(netdev); 2484 2485 flush_scheduled_work(); 2486 unregister_netdev(netdev); 2487 enic_dev_deinit(enic); 2488 vnic_dev_close(enic->vdev); 2489 vnic_dev_unregister(enic->vdev); 2490 enic_iounmap(enic); 2491 pci_release_regions(pdev); 2492 pci_disable_device(pdev); 2493 pci_set_drvdata(pdev, NULL); 2494 free_netdev(netdev); 2495 } 2496} 2497 2498static struct pci_driver enic_driver = { 2499 .name = DRV_NAME, 2500 .id_table = enic_id_table, 2501 .probe = enic_probe, 2502 .remove = __devexit_p(enic_remove), 2503}; 2504 2505static int __init enic_init_module(void) 2506{ 2507 pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); 2508 2509 return pci_register_driver(&enic_driver); 2510} 2511 2512static void __exit enic_cleanup_module(void) 2513{ 2514 pci_unregister_driver(&enic_driver); 2515} 2516 2517module_init(enic_init_module); 2518module_exit(enic_cleanup_module); 2519