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/in.h> 35 #include <linux/ip.h> 36 #include <linux/ipv6.h> 37 #include <linux/tcp.h> 38 #include <linux/rtnetlink.h> 39 #include <linux/prefetch.h> 40 #include <net/ip6_checksum.h> 41 #include <linux/ktime.h> 42 #ifdef CONFIG_RFS_ACCEL 43 #include <linux/cpu_rmap.h> 44 #endif 45 #ifdef CONFIG_NET_RX_BUSY_POLL 46 #include <net/busy_poll.h> 47 #endif 48 #include <linux/crash_dump.h> 49 50 #include "cq_enet_desc.h" 51 #include "vnic_dev.h" 52 #include "vnic_intr.h" 53 #include "vnic_stats.h" 54 #include "vnic_vic.h" 55 #include "enic_res.h" 56 #include "enic.h" 57 #include "enic_dev.h" 58 #include "enic_pp.h" 59 #include "enic_clsf.h" 60 61 #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ) 62 #define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS) 63 #define MAX_TSO (1 << 16) 64 #define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1) 65 66 #define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */ 67 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */ 68 #define PCI_DEVICE_ID_CISCO_VIC_ENET_VF 0x0071 /* enet SRIOV VF */ 69 70 #define RX_COPYBREAK_DEFAULT 256 71 72 /* Supported devices */ 73 static const struct pci_device_id enic_id_table[] = { 74 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) }, 75 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) }, 76 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) }, 77 { 0, } /* end of table */ 78 }; 79 80 MODULE_DESCRIPTION(DRV_DESCRIPTION); 81 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>"); 82 MODULE_LICENSE("GPL"); 83 MODULE_VERSION(DRV_VERSION); 84 MODULE_DEVICE_TABLE(pci, enic_id_table); 85 86 #define ENIC_LARGE_PKT_THRESHOLD 1000 87 #define ENIC_MAX_COALESCE_TIMERS 10 88 /* Interrupt moderation table, which will be used to decide the 89 * coalescing timer values 90 * {rx_rate in Mbps, mapping percentage of the range} 91 */ 92 static struct enic_intr_mod_table mod_table[ENIC_MAX_COALESCE_TIMERS + 1] = { 93 {4000, 0}, 94 {4400, 10}, 95 {5060, 20}, 96 {5230, 30}, 97 {5540, 40}, 98 {5820, 50}, 99 {6120, 60}, 100 {6435, 70}, 101 {6745, 80}, 102 {7000, 90}, 103 {0xFFFFFFFF, 100} 104 }; 105 106 /* This table helps the driver to pick different ranges for rx coalescing 107 * timer depending on the link speed. 108 */ 109 static struct enic_intr_mod_range mod_range[ENIC_MAX_LINK_SPEEDS] = { 110 {0, 0}, /* 0 - 4 Gbps */ 111 {0, 3}, /* 4 - 10 Gbps */ 112 {3, 6}, /* 10 - 40 Gbps */ 113 }; 114 115 int enic_is_dynamic(struct enic *enic) 116 { 117 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN; 118 } 119 120 int enic_sriov_enabled(struct enic *enic) 121 { 122 return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0; 123 } 124 125 static int enic_is_sriov_vf(struct enic *enic) 126 { 127 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF; 128 } 129 130 int enic_is_valid_vf(struct enic *enic, int vf) 131 { 132 #ifdef CONFIG_PCI_IOV 133 return vf >= 0 && vf < enic->num_vfs; 134 #else 135 return 0; 136 #endif 137 } 138 139 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) 140 { 141 struct enic *enic = vnic_dev_priv(wq->vdev); 142 143 if (buf->sop) 144 pci_unmap_single(enic->pdev, buf->dma_addr, 145 buf->len, PCI_DMA_TODEVICE); 146 else 147 pci_unmap_page(enic->pdev, buf->dma_addr, 148 buf->len, PCI_DMA_TODEVICE); 149 150 if (buf->os_buf) 151 dev_kfree_skb_any(buf->os_buf); 152 } 153 154 static void enic_wq_free_buf(struct vnic_wq *wq, 155 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque) 156 { 157 enic_free_wq_buf(wq, buf); 158 } 159 160 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, 161 u8 type, u16 q_number, u16 completed_index, void *opaque) 162 { 163 struct enic *enic = vnic_dev_priv(vdev); 164 165 spin_lock(&enic->wq_lock[q_number]); 166 167 vnic_wq_service(&enic->wq[q_number], cq_desc, 168 completed_index, enic_wq_free_buf, 169 opaque); 170 171 if (netif_tx_queue_stopped(netdev_get_tx_queue(enic->netdev, q_number)) && 172 vnic_wq_desc_avail(&enic->wq[q_number]) >= 173 (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)) 174 netif_wake_subqueue(enic->netdev, q_number); 175 176 spin_unlock(&enic->wq_lock[q_number]); 177 178 return 0; 179 } 180 181 static void enic_log_q_error(struct enic *enic) 182 { 183 unsigned int i; 184 u32 error_status; 185 186 for (i = 0; i < enic->wq_count; i++) { 187 error_status = vnic_wq_error_status(&enic->wq[i]); 188 if (error_status) 189 netdev_err(enic->netdev, "WQ[%d] error_status %d\n", 190 i, error_status); 191 } 192 193 for (i = 0; i < enic->rq_count; i++) { 194 error_status = vnic_rq_error_status(&enic->rq[i]); 195 if (error_status) 196 netdev_err(enic->netdev, "RQ[%d] error_status %d\n", 197 i, error_status); 198 } 199 } 200 201 static void enic_msglvl_check(struct enic *enic) 202 { 203 u32 msg_enable = vnic_dev_msg_lvl(enic->vdev); 204 205 if (msg_enable != enic->msg_enable) { 206 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n", 207 enic->msg_enable, msg_enable); 208 enic->msg_enable = msg_enable; 209 } 210 } 211 212 static void enic_mtu_check(struct enic *enic) 213 { 214 u32 mtu = vnic_dev_mtu(enic->vdev); 215 struct net_device *netdev = enic->netdev; 216 217 if (mtu && mtu != enic->port_mtu) { 218 enic->port_mtu = mtu; 219 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { 220 mtu = max_t(int, ENIC_MIN_MTU, 221 min_t(int, ENIC_MAX_MTU, mtu)); 222 if (mtu != netdev->mtu) 223 schedule_work(&enic->change_mtu_work); 224 } else { 225 if (mtu < netdev->mtu) 226 netdev_warn(netdev, 227 "interface MTU (%d) set higher " 228 "than switch port MTU (%d)\n", 229 netdev->mtu, mtu); 230 } 231 } 232 } 233 234 static void enic_link_check(struct enic *enic) 235 { 236 int link_status = vnic_dev_link_status(enic->vdev); 237 int carrier_ok = netif_carrier_ok(enic->netdev); 238 239 if (link_status && !carrier_ok) { 240 netdev_info(enic->netdev, "Link UP\n"); 241 netif_carrier_on(enic->netdev); 242 } else if (!link_status && carrier_ok) { 243 netdev_info(enic->netdev, "Link DOWN\n"); 244 netif_carrier_off(enic->netdev); 245 } 246 } 247 248 static void enic_notify_check(struct enic *enic) 249 { 250 enic_msglvl_check(enic); 251 enic_mtu_check(enic); 252 enic_link_check(enic); 253 } 254 255 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i)) 256 257 static irqreturn_t enic_isr_legacy(int irq, void *data) 258 { 259 struct net_device *netdev = data; 260 struct enic *enic = netdev_priv(netdev); 261 unsigned int io_intr = enic_legacy_io_intr(); 262 unsigned int err_intr = enic_legacy_err_intr(); 263 unsigned int notify_intr = enic_legacy_notify_intr(); 264 u32 pba; 265 266 vnic_intr_mask(&enic->intr[io_intr]); 267 268 pba = vnic_intr_legacy_pba(enic->legacy_pba); 269 if (!pba) { 270 vnic_intr_unmask(&enic->intr[io_intr]); 271 return IRQ_NONE; /* not our interrupt */ 272 } 273 274 if (ENIC_TEST_INTR(pba, notify_intr)) { 275 enic_notify_check(enic); 276 vnic_intr_return_all_credits(&enic->intr[notify_intr]); 277 } 278 279 if (ENIC_TEST_INTR(pba, err_intr)) { 280 vnic_intr_return_all_credits(&enic->intr[err_intr]); 281 enic_log_q_error(enic); 282 /* schedule recovery from WQ/RQ error */ 283 schedule_work(&enic->reset); 284 return IRQ_HANDLED; 285 } 286 287 if (ENIC_TEST_INTR(pba, io_intr)) 288 napi_schedule_irqoff(&enic->napi[0]); 289 else 290 vnic_intr_unmask(&enic->intr[io_intr]); 291 292 return IRQ_HANDLED; 293 } 294 295 static irqreturn_t enic_isr_msi(int irq, void *data) 296 { 297 struct enic *enic = data; 298 299 /* With MSI, there is no sharing of interrupts, so this is 300 * our interrupt and there is no need to ack it. The device 301 * is not providing per-vector masking, so the OS will not 302 * write to PCI config space to mask/unmask the interrupt. 303 * We're using mask_on_assertion for MSI, so the device 304 * automatically masks the interrupt when the interrupt is 305 * generated. Later, when exiting polling, the interrupt 306 * will be unmasked (see enic_poll). 307 * 308 * Also, the device uses the same PCIe Traffic Class (TC) 309 * for Memory Write data and MSI, so there are no ordering 310 * issues; the MSI will always arrive at the Root Complex 311 * _after_ corresponding Memory Writes (i.e. descriptor 312 * writes). 313 */ 314 315 napi_schedule_irqoff(&enic->napi[0]); 316 317 return IRQ_HANDLED; 318 } 319 320 static irqreturn_t enic_isr_msix(int irq, void *data) 321 { 322 struct napi_struct *napi = data; 323 324 napi_schedule_irqoff(napi); 325 326 return IRQ_HANDLED; 327 } 328 329 static irqreturn_t enic_isr_msix_err(int irq, void *data) 330 { 331 struct enic *enic = data; 332 unsigned int intr = enic_msix_err_intr(enic); 333 334 vnic_intr_return_all_credits(&enic->intr[intr]); 335 336 enic_log_q_error(enic); 337 338 /* schedule recovery from WQ/RQ error */ 339 schedule_work(&enic->reset); 340 341 return IRQ_HANDLED; 342 } 343 344 static irqreturn_t enic_isr_msix_notify(int irq, void *data) 345 { 346 struct enic *enic = data; 347 unsigned int intr = enic_msix_notify_intr(enic); 348 349 enic_notify_check(enic); 350 vnic_intr_return_all_credits(&enic->intr[intr]); 351 352 return IRQ_HANDLED; 353 } 354 355 static int enic_queue_wq_skb_cont(struct enic *enic, struct vnic_wq *wq, 356 struct sk_buff *skb, unsigned int len_left, 357 int loopback) 358 { 359 const skb_frag_t *frag; 360 dma_addr_t dma_addr; 361 362 /* Queue additional data fragments */ 363 for (frag = skb_shinfo(skb)->frags; len_left; frag++) { 364 len_left -= skb_frag_size(frag); 365 dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 0, 366 skb_frag_size(frag), 367 DMA_TO_DEVICE); 368 if (unlikely(enic_dma_map_check(enic, dma_addr))) 369 return -ENOMEM; 370 enic_queue_wq_desc_cont(wq, skb, dma_addr, skb_frag_size(frag), 371 (len_left == 0), /* EOP? */ 372 loopback); 373 } 374 375 return 0; 376 } 377 378 static int enic_queue_wq_skb_vlan(struct enic *enic, struct vnic_wq *wq, 379 struct sk_buff *skb, int vlan_tag_insert, 380 unsigned int vlan_tag, int loopback) 381 { 382 unsigned int head_len = skb_headlen(skb); 383 unsigned int len_left = skb->len - head_len; 384 int eop = (len_left == 0); 385 dma_addr_t dma_addr; 386 int err = 0; 387 388 dma_addr = pci_map_single(enic->pdev, skb->data, head_len, 389 PCI_DMA_TODEVICE); 390 if (unlikely(enic_dma_map_check(enic, dma_addr))) 391 return -ENOMEM; 392 393 /* Queue the main skb fragment. The fragments are no larger 394 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less 395 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor 396 * per fragment is queued. 397 */ 398 enic_queue_wq_desc(wq, skb, dma_addr, head_len, vlan_tag_insert, 399 vlan_tag, eop, loopback); 400 401 if (!eop) 402 err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 403 404 return err; 405 } 406 407 static int enic_queue_wq_skb_csum_l4(struct enic *enic, struct vnic_wq *wq, 408 struct sk_buff *skb, int vlan_tag_insert, 409 unsigned int vlan_tag, int loopback) 410 { 411 unsigned int head_len = skb_headlen(skb); 412 unsigned int len_left = skb->len - head_len; 413 unsigned int hdr_len = skb_checksum_start_offset(skb); 414 unsigned int csum_offset = hdr_len + skb->csum_offset; 415 int eop = (len_left == 0); 416 dma_addr_t dma_addr; 417 int err = 0; 418 419 dma_addr = pci_map_single(enic->pdev, skb->data, head_len, 420 PCI_DMA_TODEVICE); 421 if (unlikely(enic_dma_map_check(enic, dma_addr))) 422 return -ENOMEM; 423 424 /* Queue the main skb fragment. The fragments are no larger 425 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less 426 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor 427 * per fragment is queued. 428 */ 429 enic_queue_wq_desc_csum_l4(wq, skb, dma_addr, head_len, csum_offset, 430 hdr_len, vlan_tag_insert, vlan_tag, eop, 431 loopback); 432 433 if (!eop) 434 err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); 435 436 return err; 437 } 438 439 static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq, 440 struct sk_buff *skb, unsigned int mss, 441 int vlan_tag_insert, unsigned int vlan_tag, 442 int loopback) 443 { 444 unsigned int frag_len_left = skb_headlen(skb); 445 unsigned int len_left = skb->len - frag_len_left; 446 unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 447 int eop = (len_left == 0); 448 unsigned int len; 449 dma_addr_t dma_addr; 450 unsigned int offset = 0; 451 skb_frag_t *frag; 452 453 /* Preload TCP csum field with IP pseudo hdr calculated 454 * with IP length set to zero. HW will later add in length 455 * to each TCP segment resulting from the TSO. 456 */ 457 458 if (skb->protocol == cpu_to_be16(ETH_P_IP)) { 459 ip_hdr(skb)->check = 0; 460 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr, 461 ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); 462 } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) { 463 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, 464 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); 465 } 466 467 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors 468 * for the main skb fragment 469 */ 470 while (frag_len_left) { 471 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN); 472 dma_addr = pci_map_single(enic->pdev, skb->data + offset, len, 473 PCI_DMA_TODEVICE); 474 if (unlikely(enic_dma_map_check(enic, dma_addr))) 475 return -ENOMEM; 476 enic_queue_wq_desc_tso(wq, skb, dma_addr, len, mss, hdr_len, 477 vlan_tag_insert, vlan_tag, 478 eop && (len == frag_len_left), loopback); 479 frag_len_left -= len; 480 offset += len; 481 } 482 483 if (eop) 484 return 0; 485 486 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors 487 * for additional data fragments 488 */ 489 for (frag = skb_shinfo(skb)->frags; len_left; frag++) { 490 len_left -= skb_frag_size(frag); 491 frag_len_left = skb_frag_size(frag); 492 offset = 0; 493 494 while (frag_len_left) { 495 len = min(frag_len_left, 496 (unsigned int)WQ_ENET_MAX_DESC_LEN); 497 dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 498 offset, len, 499 DMA_TO_DEVICE); 500 if (unlikely(enic_dma_map_check(enic, dma_addr))) 501 return -ENOMEM; 502 enic_queue_wq_desc_cont(wq, skb, dma_addr, len, 503 (len_left == 0) && 504 (len == frag_len_left),/*EOP*/ 505 loopback); 506 frag_len_left -= len; 507 offset += len; 508 } 509 } 510 511 return 0; 512 } 513 514 static inline void enic_queue_wq_skb(struct enic *enic, 515 struct vnic_wq *wq, struct sk_buff *skb) 516 { 517 unsigned int mss = skb_shinfo(skb)->gso_size; 518 unsigned int vlan_tag = 0; 519 int vlan_tag_insert = 0; 520 int loopback = 0; 521 int err; 522 523 if (skb_vlan_tag_present(skb)) { 524 /* VLAN tag from trunking driver */ 525 vlan_tag_insert = 1; 526 vlan_tag = skb_vlan_tag_get(skb); 527 } else if (enic->loop_enable) { 528 vlan_tag = enic->loop_tag; 529 loopback = 1; 530 } 531 532 if (mss) 533 err = enic_queue_wq_skb_tso(enic, wq, skb, mss, 534 vlan_tag_insert, vlan_tag, 535 loopback); 536 else if (skb->ip_summed == CHECKSUM_PARTIAL) 537 err = enic_queue_wq_skb_csum_l4(enic, wq, skb, vlan_tag_insert, 538 vlan_tag, loopback); 539 else 540 err = enic_queue_wq_skb_vlan(enic, wq, skb, vlan_tag_insert, 541 vlan_tag, loopback); 542 if (unlikely(err)) { 543 struct vnic_wq_buf *buf; 544 545 buf = wq->to_use->prev; 546 /* while not EOP of previous pkt && queue not empty. 547 * For all non EOP bufs, os_buf is NULL. 548 */ 549 while (!buf->os_buf && (buf->next != wq->to_clean)) { 550 enic_free_wq_buf(wq, buf); 551 wq->ring.desc_avail++; 552 buf = buf->prev; 553 } 554 wq->to_use = buf->next; 555 dev_kfree_skb(skb); 556 } 557 } 558 559 /* netif_tx_lock held, process context with BHs disabled, or BH */ 560 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb, 561 struct net_device *netdev) 562 { 563 struct enic *enic = netdev_priv(netdev); 564 struct vnic_wq *wq; 565 unsigned int txq_map; 566 struct netdev_queue *txq; 567 568 if (skb->len <= 0) { 569 dev_kfree_skb_any(skb); 570 return NETDEV_TX_OK; 571 } 572 573 txq_map = skb_get_queue_mapping(skb) % enic->wq_count; 574 wq = &enic->wq[txq_map]; 575 txq = netdev_get_tx_queue(netdev, txq_map); 576 577 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs, 578 * which is very likely. In the off chance it's going to take 579 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb. 580 */ 581 582 if (skb_shinfo(skb)->gso_size == 0 && 583 skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC && 584 skb_linearize(skb)) { 585 dev_kfree_skb_any(skb); 586 return NETDEV_TX_OK; 587 } 588 589 spin_lock(&enic->wq_lock[txq_map]); 590 591 if (vnic_wq_desc_avail(wq) < 592 skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) { 593 netif_tx_stop_queue(txq); 594 /* This is a hard error, log it */ 595 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n"); 596 spin_unlock(&enic->wq_lock[txq_map]); 597 return NETDEV_TX_BUSY; 598 } 599 600 enic_queue_wq_skb(enic, wq, skb); 601 602 if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS) 603 netif_tx_stop_queue(txq); 604 if (!skb->xmit_more || netif_xmit_stopped(txq)) 605 vnic_wq_doorbell(wq); 606 607 spin_unlock(&enic->wq_lock[txq_map]); 608 609 return NETDEV_TX_OK; 610 } 611 612 /* dev_base_lock rwlock held, nominally process context */ 613 static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev, 614 struct rtnl_link_stats64 *net_stats) 615 { 616 struct enic *enic = netdev_priv(netdev); 617 struct vnic_stats *stats; 618 619 enic_dev_stats_dump(enic, &stats); 620 621 net_stats->tx_packets = stats->tx.tx_frames_ok; 622 net_stats->tx_bytes = stats->tx.tx_bytes_ok; 623 net_stats->tx_errors = stats->tx.tx_errors; 624 net_stats->tx_dropped = stats->tx.tx_drops; 625 626 net_stats->rx_packets = stats->rx.rx_frames_ok; 627 net_stats->rx_bytes = stats->rx.rx_bytes_ok; 628 net_stats->rx_errors = stats->rx.rx_errors; 629 net_stats->multicast = stats->rx.rx_multicast_frames_ok; 630 net_stats->rx_over_errors = enic->rq_truncated_pkts; 631 net_stats->rx_crc_errors = enic->rq_bad_fcs; 632 net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop; 633 634 return net_stats; 635 } 636 637 static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr) 638 { 639 struct enic *enic = netdev_priv(netdev); 640 641 if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) { 642 unsigned int mc_count = netdev_mc_count(netdev); 643 644 netdev_warn(netdev, "Registering only %d out of %d multicast addresses\n", 645 ENIC_MULTICAST_PERFECT_FILTERS, mc_count); 646 647 return -ENOSPC; 648 } 649 650 enic_dev_add_addr(enic, mc_addr); 651 enic->mc_count++; 652 653 return 0; 654 } 655 656 static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr) 657 { 658 struct enic *enic = netdev_priv(netdev); 659 660 enic_dev_del_addr(enic, mc_addr); 661 enic->mc_count--; 662 663 return 0; 664 } 665 666 static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr) 667 { 668 struct enic *enic = netdev_priv(netdev); 669 670 if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) { 671 unsigned int uc_count = netdev_uc_count(netdev); 672 673 netdev_warn(netdev, "Registering only %d out of %d unicast addresses\n", 674 ENIC_UNICAST_PERFECT_FILTERS, uc_count); 675 676 return -ENOSPC; 677 } 678 679 enic_dev_add_addr(enic, uc_addr); 680 enic->uc_count++; 681 682 return 0; 683 } 684 685 static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr) 686 { 687 struct enic *enic = netdev_priv(netdev); 688 689 enic_dev_del_addr(enic, uc_addr); 690 enic->uc_count--; 691 692 return 0; 693 } 694 695 void enic_reset_addr_lists(struct enic *enic) 696 { 697 struct net_device *netdev = enic->netdev; 698 699 __dev_uc_unsync(netdev, NULL); 700 __dev_mc_unsync(netdev, NULL); 701 702 enic->mc_count = 0; 703 enic->uc_count = 0; 704 enic->flags = 0; 705 } 706 707 static int enic_set_mac_addr(struct net_device *netdev, char *addr) 708 { 709 struct enic *enic = netdev_priv(netdev); 710 711 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { 712 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr)) 713 return -EADDRNOTAVAIL; 714 } else { 715 if (!is_valid_ether_addr(addr)) 716 return -EADDRNOTAVAIL; 717 } 718 719 memcpy(netdev->dev_addr, addr, netdev->addr_len); 720 721 return 0; 722 } 723 724 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p) 725 { 726 struct enic *enic = netdev_priv(netdev); 727 struct sockaddr *saddr = p; 728 char *addr = saddr->sa_data; 729 int err; 730 731 if (netif_running(enic->netdev)) { 732 err = enic_dev_del_station_addr(enic); 733 if (err) 734 return err; 735 } 736 737 err = enic_set_mac_addr(netdev, addr); 738 if (err) 739 return err; 740 741 if (netif_running(enic->netdev)) { 742 err = enic_dev_add_station_addr(enic); 743 if (err) 744 return err; 745 } 746 747 return err; 748 } 749 750 static int enic_set_mac_address(struct net_device *netdev, void *p) 751 { 752 struct sockaddr *saddr = p; 753 char *addr = saddr->sa_data; 754 struct enic *enic = netdev_priv(netdev); 755 int err; 756 757 err = enic_dev_del_station_addr(enic); 758 if (err) 759 return err; 760 761 err = enic_set_mac_addr(netdev, addr); 762 if (err) 763 return err; 764 765 return enic_dev_add_station_addr(enic); 766 } 767 768 /* netif_tx_lock held, BHs disabled */ 769 static void enic_set_rx_mode(struct net_device *netdev) 770 { 771 struct enic *enic = netdev_priv(netdev); 772 int directed = 1; 773 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0; 774 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0; 775 int promisc = (netdev->flags & IFF_PROMISC) || 776 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS; 777 int allmulti = (netdev->flags & IFF_ALLMULTI) || 778 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS; 779 unsigned int flags = netdev->flags | 780 (allmulti ? IFF_ALLMULTI : 0) | 781 (promisc ? IFF_PROMISC : 0); 782 783 if (enic->flags != flags) { 784 enic->flags = flags; 785 enic_dev_packet_filter(enic, directed, 786 multicast, broadcast, promisc, allmulti); 787 } 788 789 if (!promisc) { 790 __dev_uc_sync(netdev, enic_uc_sync, enic_uc_unsync); 791 if (!allmulti) 792 __dev_mc_sync(netdev, enic_mc_sync, enic_mc_unsync); 793 } 794 } 795 796 /* netif_tx_lock held, BHs disabled */ 797 static void enic_tx_timeout(struct net_device *netdev) 798 { 799 struct enic *enic = netdev_priv(netdev); 800 schedule_work(&enic->reset); 801 } 802 803 static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac) 804 { 805 struct enic *enic = netdev_priv(netdev); 806 struct enic_port_profile *pp; 807 int err; 808 809 ENIC_PP_BY_INDEX(enic, vf, pp, &err); 810 if (err) 811 return err; 812 813 if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) { 814 if (vf == PORT_SELF_VF) { 815 memcpy(pp->vf_mac, mac, ETH_ALEN); 816 return 0; 817 } else { 818 /* 819 * For sriov vf's set the mac in hw 820 */ 821 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 822 vnic_dev_set_mac_addr, mac); 823 return enic_dev_status_to_errno(err); 824 } 825 } else 826 return -EINVAL; 827 } 828 829 static int enic_set_vf_port(struct net_device *netdev, int vf, 830 struct nlattr *port[]) 831 { 832 struct enic *enic = netdev_priv(netdev); 833 struct enic_port_profile prev_pp; 834 struct enic_port_profile *pp; 835 int err = 0, restore_pp = 1; 836 837 ENIC_PP_BY_INDEX(enic, vf, pp, &err); 838 if (err) 839 return err; 840 841 if (!port[IFLA_PORT_REQUEST]) 842 return -EOPNOTSUPP; 843 844 memcpy(&prev_pp, pp, sizeof(*enic->pp)); 845 memset(pp, 0, sizeof(*enic->pp)); 846 847 pp->set |= ENIC_SET_REQUEST; 848 pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]); 849 850 if (port[IFLA_PORT_PROFILE]) { 851 pp->set |= ENIC_SET_NAME; 852 memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]), 853 PORT_PROFILE_MAX); 854 } 855 856 if (port[IFLA_PORT_INSTANCE_UUID]) { 857 pp->set |= ENIC_SET_INSTANCE; 858 memcpy(pp->instance_uuid, 859 nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX); 860 } 861 862 if (port[IFLA_PORT_HOST_UUID]) { 863 pp->set |= ENIC_SET_HOST; 864 memcpy(pp->host_uuid, 865 nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX); 866 } 867 868 if (vf == PORT_SELF_VF) { 869 /* Special case handling: mac came from IFLA_VF_MAC */ 870 if (!is_zero_ether_addr(prev_pp.vf_mac)) 871 memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN); 872 873 if (is_zero_ether_addr(netdev->dev_addr)) 874 eth_hw_addr_random(netdev); 875 } else { 876 /* SR-IOV VF: get mac from adapter */ 877 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, 878 vnic_dev_get_mac_addr, pp->mac_addr); 879 if (err) { 880 netdev_err(netdev, "Error getting mac for vf %d\n", vf); 881 memcpy(pp, &prev_pp, sizeof(*pp)); 882 return enic_dev_status_to_errno(err); 883 } 884 } 885 886 err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp); 887 if (err) { 888 if (restore_pp) { 889 /* Things are still the way they were: Implicit 890 * DISASSOCIATE failed 891 */ 892 memcpy(pp, &prev_pp, sizeof(*pp)); 893 } else { 894 memset(pp, 0, sizeof(*pp)); 895 if (vf == PORT_SELF_VF) 896 memset(netdev->dev_addr, 0, ETH_ALEN); 897 } 898 } else { 899 /* Set flag to indicate that the port assoc/disassoc 900 * request has been sent out to fw 901 */ 902 pp->set |= ENIC_PORT_REQUEST_APPLIED; 903 904 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */ 905 if (pp->request == PORT_REQUEST_DISASSOCIATE) { 906 memset(pp->mac_addr, 0, ETH_ALEN); 907 if (vf == PORT_SELF_VF) 908 memset(netdev->dev_addr, 0, ETH_ALEN); 909 } 910 } 911 912 if (vf == PORT_SELF_VF) 913 memset(pp->vf_mac, 0, ETH_ALEN); 914 915 return err; 916 } 917 918 static int enic_get_vf_port(struct net_device *netdev, int vf, 919 struct sk_buff *skb) 920 { 921 struct enic *enic = netdev_priv(netdev); 922 u16 response = PORT_PROFILE_RESPONSE_SUCCESS; 923 struct enic_port_profile *pp; 924 int err; 925 926 ENIC_PP_BY_INDEX(enic, vf, pp, &err); 927 if (err) 928 return err; 929 930 if (!(pp->set & ENIC_PORT_REQUEST_APPLIED)) 931 return -ENODATA; 932 933 err = enic_process_get_pp_request(enic, vf, pp->request, &response); 934 if (err) 935 return err; 936 937 if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) || 938 nla_put_u16(skb, IFLA_PORT_RESPONSE, response) || 939 ((pp->set & ENIC_SET_NAME) && 940 nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) || 941 ((pp->set & ENIC_SET_INSTANCE) && 942 nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX, 943 pp->instance_uuid)) || 944 ((pp->set & ENIC_SET_HOST) && 945 nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid))) 946 goto nla_put_failure; 947 return 0; 948 949 nla_put_failure: 950 return -EMSGSIZE; 951 } 952 953 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) 954 { 955 struct enic *enic = vnic_dev_priv(rq->vdev); 956 957 if (!buf->os_buf) 958 return; 959 960 pci_unmap_single(enic->pdev, buf->dma_addr, 961 buf->len, PCI_DMA_FROMDEVICE); 962 dev_kfree_skb_any(buf->os_buf); 963 buf->os_buf = NULL; 964 } 965 966 static int enic_rq_alloc_buf(struct vnic_rq *rq) 967 { 968 struct enic *enic = vnic_dev_priv(rq->vdev); 969 struct net_device *netdev = enic->netdev; 970 struct sk_buff *skb; 971 unsigned int len = netdev->mtu + VLAN_ETH_HLEN; 972 unsigned int os_buf_index = 0; 973 dma_addr_t dma_addr; 974 struct vnic_rq_buf *buf = rq->to_use; 975 976 if (buf->os_buf) { 977 enic_queue_rq_desc(rq, buf->os_buf, os_buf_index, buf->dma_addr, 978 buf->len); 979 980 return 0; 981 } 982 skb = netdev_alloc_skb_ip_align(netdev, len); 983 if (!skb) 984 return -ENOMEM; 985 986 dma_addr = pci_map_single(enic->pdev, skb->data, len, 987 PCI_DMA_FROMDEVICE); 988 if (unlikely(enic_dma_map_check(enic, dma_addr))) { 989 dev_kfree_skb(skb); 990 return -ENOMEM; 991 } 992 993 enic_queue_rq_desc(rq, skb, os_buf_index, 994 dma_addr, len); 995 996 return 0; 997 } 998 999 static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter *pkt_size, 1000 u32 pkt_len) 1001 { 1002 if (ENIC_LARGE_PKT_THRESHOLD <= pkt_len) 1003 pkt_size->large_pkt_bytes_cnt += pkt_len; 1004 else 1005 pkt_size->small_pkt_bytes_cnt += pkt_len; 1006 } 1007 1008 static bool enic_rxcopybreak(struct net_device *netdev, struct sk_buff **skb, 1009 struct vnic_rq_buf *buf, u16 len) 1010 { 1011 struct enic *enic = netdev_priv(netdev); 1012 struct sk_buff *new_skb; 1013 1014 if (len > enic->rx_copybreak) 1015 return false; 1016 new_skb = netdev_alloc_skb_ip_align(netdev, len); 1017 if (!new_skb) 1018 return false; 1019 pci_dma_sync_single_for_cpu(enic->pdev, buf->dma_addr, len, 1020 DMA_FROM_DEVICE); 1021 memcpy(new_skb->data, (*skb)->data, len); 1022 *skb = new_skb; 1023 1024 return true; 1025 } 1026 1027 static void enic_rq_indicate_buf(struct vnic_rq *rq, 1028 struct cq_desc *cq_desc, struct vnic_rq_buf *buf, 1029 int skipped, void *opaque) 1030 { 1031 struct enic *enic = vnic_dev_priv(rq->vdev); 1032 struct net_device *netdev = enic->netdev; 1033 struct sk_buff *skb; 1034 struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 1035 1036 u8 type, color, eop, sop, ingress_port, vlan_stripped; 1037 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof; 1038 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; 1039 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc; 1040 u8 packet_error; 1041 u16 q_number, completed_index, bytes_written, vlan_tci, checksum; 1042 u32 rss_hash; 1043 1044 if (skipped) 1045 return; 1046 1047 skb = buf->os_buf; 1048 1049 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, 1050 &type, &color, &q_number, &completed_index, 1051 &ingress_port, &fcoe, &eop, &sop, &rss_type, 1052 &csum_not_calc, &rss_hash, &bytes_written, 1053 &packet_error, &vlan_stripped, &vlan_tci, &checksum, 1054 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error, 1055 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp, 1056 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment, 1057 &fcs_ok); 1058 1059 if (packet_error) { 1060 1061 if (!fcs_ok) { 1062 if (bytes_written > 0) 1063 enic->rq_bad_fcs++; 1064 else if (bytes_written == 0) 1065 enic->rq_truncated_pkts++; 1066 } 1067 1068 pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 1069 PCI_DMA_FROMDEVICE); 1070 dev_kfree_skb_any(skb); 1071 buf->os_buf = NULL; 1072 1073 return; 1074 } 1075 1076 if (eop && bytes_written > 0) { 1077 1078 /* Good receive 1079 */ 1080 1081 if (!enic_rxcopybreak(netdev, &skb, buf, bytes_written)) { 1082 buf->os_buf = NULL; 1083 pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 1084 PCI_DMA_FROMDEVICE); 1085 } 1086 prefetch(skb->data - NET_IP_ALIGN); 1087 1088 skb_put(skb, bytes_written); 1089 skb->protocol = eth_type_trans(skb, netdev); 1090 skb_record_rx_queue(skb, q_number); 1091 if (netdev->features & NETIF_F_RXHASH) { 1092 skb_set_hash(skb, rss_hash, 1093 (rss_type & 1094 (NIC_CFG_RSS_HASH_TYPE_TCP_IPV6_EX | 1095 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6 | 1096 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4)) ? 1097 PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3); 1098 } 1099 1100 /* Hardware does not provide whole packet checksum. It only 1101 * provides pseudo checksum. Since hw validates the packet 1102 * checksum but not provide us the checksum value. use 1103 * CHECSUM_UNNECESSARY. 1104 */ 1105 if ((netdev->features & NETIF_F_RXCSUM) && tcp_udp_csum_ok && 1106 ipv4_csum_ok) 1107 skb->ip_summed = CHECKSUM_UNNECESSARY; 1108 1109 if (vlan_stripped) 1110 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); 1111 1112 skb_mark_napi_id(skb, &enic->napi[rq->index]); 1113 if (enic_poll_busy_polling(rq) || 1114 !(netdev->features & NETIF_F_GRO)) 1115 netif_receive_skb(skb); 1116 else 1117 napi_gro_receive(&enic->napi[q_number], skb); 1118 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1119 enic_intr_update_pkt_size(&cq->pkt_size_counter, 1120 bytes_written); 1121 } else { 1122 1123 /* Buffer overflow 1124 */ 1125 1126 pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, 1127 PCI_DMA_FROMDEVICE); 1128 dev_kfree_skb_any(skb); 1129 buf->os_buf = NULL; 1130 } 1131 } 1132 1133 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, 1134 u8 type, u16 q_number, u16 completed_index, void *opaque) 1135 { 1136 struct enic *enic = vnic_dev_priv(vdev); 1137 1138 vnic_rq_service(&enic->rq[q_number], cq_desc, 1139 completed_index, VNIC_RQ_RETURN_DESC, 1140 enic_rq_indicate_buf, opaque); 1141 1142 return 0; 1143 } 1144 1145 static int enic_poll(struct napi_struct *napi, int budget) 1146 { 1147 struct net_device *netdev = napi->dev; 1148 struct enic *enic = netdev_priv(netdev); 1149 unsigned int cq_rq = enic_cq_rq(enic, 0); 1150 unsigned int cq_wq = enic_cq_wq(enic, 0); 1151 unsigned int intr = enic_legacy_io_intr(); 1152 unsigned int rq_work_to_do = budget; 1153 unsigned int wq_work_to_do = -1; /* no limit */ 1154 unsigned int work_done, rq_work_done = 0, wq_work_done; 1155 int err; 1156 1157 wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do, 1158 enic_wq_service, NULL); 1159 1160 if (!enic_poll_lock_napi(&enic->rq[cq_rq])) { 1161 if (wq_work_done > 0) 1162 vnic_intr_return_credits(&enic->intr[intr], 1163 wq_work_done, 1164 0 /* dont unmask intr */, 1165 0 /* dont reset intr timer */); 1166 return rq_work_done; 1167 } 1168 1169 if (budget > 0) 1170 rq_work_done = vnic_cq_service(&enic->cq[cq_rq], 1171 rq_work_to_do, enic_rq_service, NULL); 1172 1173 /* Accumulate intr event credits for this polling 1174 * cycle. An intr event is the completion of a 1175 * a WQ or RQ packet. 1176 */ 1177 1178 work_done = rq_work_done + wq_work_done; 1179 1180 if (work_done > 0) 1181 vnic_intr_return_credits(&enic->intr[intr], 1182 work_done, 1183 0 /* don't unmask intr */, 1184 0 /* don't reset intr timer */); 1185 1186 err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); 1187 1188 /* Buffer allocation failed. Stay in polling 1189 * mode so we can try to fill the ring again. 1190 */ 1191 1192 if (err) 1193 rq_work_done = rq_work_to_do; 1194 1195 if (rq_work_done < rq_work_to_do) { 1196 1197 /* Some work done, but not enough to stay in polling, 1198 * exit polling 1199 */ 1200 1201 napi_complete(napi); 1202 vnic_intr_unmask(&enic->intr[intr]); 1203 } 1204 enic_poll_unlock_napi(&enic->rq[cq_rq]); 1205 1206 return rq_work_done; 1207 } 1208 1209 static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq) 1210 { 1211 unsigned int intr = enic_msix_rq_intr(enic, rq->index); 1212 struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 1213 u32 timer = cq->tobe_rx_coal_timeval; 1214 1215 if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) { 1216 vnic_intr_coalescing_timer_set(&enic->intr[intr], timer); 1217 cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval; 1218 } 1219 } 1220 1221 static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq) 1222 { 1223 struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; 1224 struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; 1225 struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter; 1226 int index; 1227 u32 timer; 1228 u32 range_start; 1229 u32 traffic; 1230 u64 delta; 1231 ktime_t now = ktime_get(); 1232 1233 delta = ktime_us_delta(now, cq->prev_ts); 1234 if (delta < ENIC_AIC_TS_BREAK) 1235 return; 1236 cq->prev_ts = now; 1237 1238 traffic = pkt_size_counter->large_pkt_bytes_cnt + 1239 pkt_size_counter->small_pkt_bytes_cnt; 1240 /* The table takes Mbps 1241 * traffic *= 8 => bits 1242 * traffic *= (10^6 / delta) => bps 1243 * traffic /= 10^6 => Mbps 1244 * 1245 * Combining, traffic *= (8 / delta) 1246 */ 1247 1248 traffic <<= 3; 1249 traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta; 1250 1251 for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++) 1252 if (traffic < mod_table[index].rx_rate) 1253 break; 1254 range_start = (pkt_size_counter->small_pkt_bytes_cnt > 1255 pkt_size_counter->large_pkt_bytes_cnt << 1) ? 1256 rx_coal->small_pkt_range_start : 1257 rx_coal->large_pkt_range_start; 1258 timer = range_start + ((rx_coal->range_end - range_start) * 1259 mod_table[index].range_percent / 100); 1260 /* Damping */ 1261 cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1; 1262 1263 pkt_size_counter->large_pkt_bytes_cnt = 0; 1264 pkt_size_counter->small_pkt_bytes_cnt = 0; 1265 } 1266 1267 #ifdef CONFIG_RFS_ACCEL 1268 static void enic_free_rx_cpu_rmap(struct enic *enic) 1269 { 1270 free_irq_cpu_rmap(enic->netdev->rx_cpu_rmap); 1271 enic->netdev->rx_cpu_rmap = NULL; 1272 } 1273 1274 static void enic_set_rx_cpu_rmap(struct enic *enic) 1275 { 1276 int i, res; 1277 1278 if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) { 1279 enic->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(enic->rq_count); 1280 if (unlikely(!enic->netdev->rx_cpu_rmap)) 1281 return; 1282 for (i = 0; i < enic->rq_count; i++) { 1283 res = irq_cpu_rmap_add(enic->netdev->rx_cpu_rmap, 1284 enic->msix_entry[i].vector); 1285 if (unlikely(res)) { 1286 enic_free_rx_cpu_rmap(enic); 1287 return; 1288 } 1289 } 1290 } 1291 } 1292 1293 #else 1294 1295 static void enic_free_rx_cpu_rmap(struct enic *enic) 1296 { 1297 } 1298 1299 static void enic_set_rx_cpu_rmap(struct enic *enic) 1300 { 1301 } 1302 1303 #endif /* CONFIG_RFS_ACCEL */ 1304 1305 #ifdef CONFIG_NET_RX_BUSY_POLL 1306 static int enic_busy_poll(struct napi_struct *napi) 1307 { 1308 struct net_device *netdev = napi->dev; 1309 struct enic *enic = netdev_priv(netdev); 1310 unsigned int rq = (napi - &enic->napi[0]); 1311 unsigned int cq = enic_cq_rq(enic, rq); 1312 unsigned int intr = enic_msix_rq_intr(enic, rq); 1313 unsigned int work_to_do = -1; /* clean all pkts possible */ 1314 unsigned int work_done; 1315 1316 if (!enic_poll_lock_poll(&enic->rq[rq])) 1317 return LL_FLUSH_BUSY; 1318 work_done = vnic_cq_service(&enic->cq[cq], work_to_do, 1319 enic_rq_service, NULL); 1320 1321 if (work_done > 0) 1322 vnic_intr_return_credits(&enic->intr[intr], 1323 work_done, 0, 0); 1324 vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf); 1325 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1326 enic_calc_int_moderation(enic, &enic->rq[rq]); 1327 enic_poll_unlock_poll(&enic->rq[rq]); 1328 1329 return work_done; 1330 } 1331 #endif /* CONFIG_NET_RX_BUSY_POLL */ 1332 1333 static int enic_poll_msix_wq(struct napi_struct *napi, int budget) 1334 { 1335 struct net_device *netdev = napi->dev; 1336 struct enic *enic = netdev_priv(netdev); 1337 unsigned int wq_index = (napi - &enic->napi[0]) - enic->rq_count; 1338 struct vnic_wq *wq = &enic->wq[wq_index]; 1339 unsigned int cq; 1340 unsigned int intr; 1341 unsigned int wq_work_to_do = -1; /* clean all desc possible */ 1342 unsigned int wq_work_done; 1343 unsigned int wq_irq; 1344 1345 wq_irq = wq->index; 1346 cq = enic_cq_wq(enic, wq_irq); 1347 intr = enic_msix_wq_intr(enic, wq_irq); 1348 wq_work_done = vnic_cq_service(&enic->cq[cq], wq_work_to_do, 1349 enic_wq_service, NULL); 1350 1351 vnic_intr_return_credits(&enic->intr[intr], wq_work_done, 1352 0 /* don't unmask intr */, 1353 1 /* reset intr timer */); 1354 if (!wq_work_done) { 1355 napi_complete(napi); 1356 vnic_intr_unmask(&enic->intr[intr]); 1357 return 0; 1358 } 1359 1360 return budget; 1361 } 1362 1363 static int enic_poll_msix_rq(struct napi_struct *napi, int budget) 1364 { 1365 struct net_device *netdev = napi->dev; 1366 struct enic *enic = netdev_priv(netdev); 1367 unsigned int rq = (napi - &enic->napi[0]); 1368 unsigned int cq = enic_cq_rq(enic, rq); 1369 unsigned int intr = enic_msix_rq_intr(enic, rq); 1370 unsigned int work_to_do = budget; 1371 unsigned int work_done = 0; 1372 int err; 1373 1374 if (!enic_poll_lock_napi(&enic->rq[rq])) 1375 return budget; 1376 /* Service RQ 1377 */ 1378 1379 if (budget > 0) 1380 work_done = vnic_cq_service(&enic->cq[cq], 1381 work_to_do, enic_rq_service, NULL); 1382 1383 /* Return intr event credits for this polling 1384 * cycle. An intr event is the completion of a 1385 * RQ packet. 1386 */ 1387 1388 if (work_done > 0) 1389 vnic_intr_return_credits(&enic->intr[intr], 1390 work_done, 1391 0 /* don't unmask intr */, 1392 0 /* don't reset intr timer */); 1393 1394 err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf); 1395 1396 /* Buffer allocation failed. Stay in polling mode 1397 * so we can try to fill the ring again. 1398 */ 1399 1400 if (err) 1401 work_done = work_to_do; 1402 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1403 /* Call the function which refreshes 1404 * the intr coalescing timer value based on 1405 * the traffic. This is supported only in 1406 * the case of MSI-x mode 1407 */ 1408 enic_calc_int_moderation(enic, &enic->rq[rq]); 1409 1410 if (work_done < work_to_do) { 1411 1412 /* Some work done, but not enough to stay in polling, 1413 * exit polling 1414 */ 1415 1416 napi_complete(napi); 1417 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) 1418 enic_set_int_moderation(enic, &enic->rq[rq]); 1419 vnic_intr_unmask(&enic->intr[intr]); 1420 } 1421 enic_poll_unlock_napi(&enic->rq[rq]); 1422 1423 return work_done; 1424 } 1425 1426 static void enic_notify_timer(unsigned long data) 1427 { 1428 struct enic *enic = (struct enic *)data; 1429 1430 enic_notify_check(enic); 1431 1432 mod_timer(&enic->notify_timer, 1433 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD)); 1434 } 1435 1436 static void enic_free_intr(struct enic *enic) 1437 { 1438 struct net_device *netdev = enic->netdev; 1439 unsigned int i; 1440 1441 enic_free_rx_cpu_rmap(enic); 1442 switch (vnic_dev_get_intr_mode(enic->vdev)) { 1443 case VNIC_DEV_INTR_MODE_INTX: 1444 free_irq(enic->pdev->irq, netdev); 1445 break; 1446 case VNIC_DEV_INTR_MODE_MSI: 1447 free_irq(enic->pdev->irq, enic); 1448 break; 1449 case VNIC_DEV_INTR_MODE_MSIX: 1450 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) 1451 if (enic->msix[i].requested) 1452 free_irq(enic->msix_entry[i].vector, 1453 enic->msix[i].devid); 1454 break; 1455 default: 1456 break; 1457 } 1458 } 1459 1460 static int enic_request_intr(struct enic *enic) 1461 { 1462 struct net_device *netdev = enic->netdev; 1463 unsigned int i, intr; 1464 int err = 0; 1465 1466 enic_set_rx_cpu_rmap(enic); 1467 switch (vnic_dev_get_intr_mode(enic->vdev)) { 1468 1469 case VNIC_DEV_INTR_MODE_INTX: 1470 1471 err = request_irq(enic->pdev->irq, enic_isr_legacy, 1472 IRQF_SHARED, netdev->name, netdev); 1473 break; 1474 1475 case VNIC_DEV_INTR_MODE_MSI: 1476 1477 err = request_irq(enic->pdev->irq, enic_isr_msi, 1478 0, netdev->name, enic); 1479 break; 1480 1481 case VNIC_DEV_INTR_MODE_MSIX: 1482 1483 for (i = 0; i < enic->rq_count; i++) { 1484 intr = enic_msix_rq_intr(enic, i); 1485 snprintf(enic->msix[intr].devname, 1486 sizeof(enic->msix[intr].devname), 1487 "%.11s-rx-%d", netdev->name, i); 1488 enic->msix[intr].isr = enic_isr_msix; 1489 enic->msix[intr].devid = &enic->napi[i]; 1490 } 1491 1492 for (i = 0; i < enic->wq_count; i++) { 1493 int wq = enic_cq_wq(enic, i); 1494 1495 intr = enic_msix_wq_intr(enic, i); 1496 snprintf(enic->msix[intr].devname, 1497 sizeof(enic->msix[intr].devname), 1498 "%.11s-tx-%d", netdev->name, i); 1499 enic->msix[intr].isr = enic_isr_msix; 1500 enic->msix[intr].devid = &enic->napi[wq]; 1501 } 1502 1503 intr = enic_msix_err_intr(enic); 1504 snprintf(enic->msix[intr].devname, 1505 sizeof(enic->msix[intr].devname), 1506 "%.11s-err", netdev->name); 1507 enic->msix[intr].isr = enic_isr_msix_err; 1508 enic->msix[intr].devid = enic; 1509 1510 intr = enic_msix_notify_intr(enic); 1511 snprintf(enic->msix[intr].devname, 1512 sizeof(enic->msix[intr].devname), 1513 "%.11s-notify", netdev->name); 1514 enic->msix[intr].isr = enic_isr_msix_notify; 1515 enic->msix[intr].devid = enic; 1516 1517 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) 1518 enic->msix[i].requested = 0; 1519 1520 for (i = 0; i < enic->intr_count; i++) { 1521 err = request_irq(enic->msix_entry[i].vector, 1522 enic->msix[i].isr, 0, 1523 enic->msix[i].devname, 1524 enic->msix[i].devid); 1525 if (err) { 1526 enic_free_intr(enic); 1527 break; 1528 } 1529 enic->msix[i].requested = 1; 1530 } 1531 1532 break; 1533 1534 default: 1535 break; 1536 } 1537 1538 return err; 1539 } 1540 1541 static void enic_synchronize_irqs(struct enic *enic) 1542 { 1543 unsigned int i; 1544 1545 switch (vnic_dev_get_intr_mode(enic->vdev)) { 1546 case VNIC_DEV_INTR_MODE_INTX: 1547 case VNIC_DEV_INTR_MODE_MSI: 1548 synchronize_irq(enic->pdev->irq); 1549 break; 1550 case VNIC_DEV_INTR_MODE_MSIX: 1551 for (i = 0; i < enic->intr_count; i++) 1552 synchronize_irq(enic->msix_entry[i].vector); 1553 break; 1554 default: 1555 break; 1556 } 1557 } 1558 1559 static void enic_set_rx_coal_setting(struct enic *enic) 1560 { 1561 unsigned int speed; 1562 int index = -1; 1563 struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; 1564 1565 /* If intr mode is not MSIX, do not do adaptive coalescing */ 1566 if (VNIC_DEV_INTR_MODE_MSIX != vnic_dev_get_intr_mode(enic->vdev)) { 1567 netdev_info(enic->netdev, "INTR mode is not MSIX, Not initializing adaptive coalescing"); 1568 return; 1569 } 1570 1571 /* 1. Read the link speed from fw 1572 * 2. Pick the default range for the speed 1573 * 3. Update it in enic->rx_coalesce_setting 1574 */ 1575 speed = vnic_dev_port_speed(enic->vdev); 1576 if (ENIC_LINK_SPEED_10G < speed) 1577 index = ENIC_LINK_40G_INDEX; 1578 else if (ENIC_LINK_SPEED_4G < speed) 1579 index = ENIC_LINK_10G_INDEX; 1580 else 1581 index = ENIC_LINK_4G_INDEX; 1582 1583 rx_coal->small_pkt_range_start = mod_range[index].small_pkt_range_start; 1584 rx_coal->large_pkt_range_start = mod_range[index].large_pkt_range_start; 1585 rx_coal->range_end = ENIC_RX_COALESCE_RANGE_END; 1586 1587 /* Start with the value provided by UCSM */ 1588 for (index = 0; index < enic->rq_count; index++) 1589 enic->cq[index].cur_rx_coal_timeval = 1590 enic->config.intr_timer_usec; 1591 1592 rx_coal->use_adaptive_rx_coalesce = 1; 1593 } 1594 1595 static int enic_dev_notify_set(struct enic *enic) 1596 { 1597 int err; 1598 1599 spin_lock_bh(&enic->devcmd_lock); 1600 switch (vnic_dev_get_intr_mode(enic->vdev)) { 1601 case VNIC_DEV_INTR_MODE_INTX: 1602 err = vnic_dev_notify_set(enic->vdev, 1603 enic_legacy_notify_intr()); 1604 break; 1605 case VNIC_DEV_INTR_MODE_MSIX: 1606 err = vnic_dev_notify_set(enic->vdev, 1607 enic_msix_notify_intr(enic)); 1608 break; 1609 default: 1610 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */); 1611 break; 1612 } 1613 spin_unlock_bh(&enic->devcmd_lock); 1614 1615 return err; 1616 } 1617 1618 static void enic_notify_timer_start(struct enic *enic) 1619 { 1620 switch (vnic_dev_get_intr_mode(enic->vdev)) { 1621 case VNIC_DEV_INTR_MODE_MSI: 1622 mod_timer(&enic->notify_timer, jiffies); 1623 break; 1624 default: 1625 /* Using intr for notification for INTx/MSI-X */ 1626 break; 1627 } 1628 } 1629 1630 /* rtnl lock is held, process context */ 1631 static int enic_open(struct net_device *netdev) 1632 { 1633 struct enic *enic = netdev_priv(netdev); 1634 unsigned int i; 1635 int err; 1636 1637 err = enic_request_intr(enic); 1638 if (err) { 1639 netdev_err(netdev, "Unable to request irq.\n"); 1640 return err; 1641 } 1642 1643 err = enic_dev_notify_set(enic); 1644 if (err) { 1645 netdev_err(netdev, 1646 "Failed to alloc notify buffer, aborting.\n"); 1647 goto err_out_free_intr; 1648 } 1649 1650 for (i = 0; i < enic->rq_count; i++) { 1651 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf); 1652 /* Need at least one buffer on ring to get going */ 1653 if (vnic_rq_desc_used(&enic->rq[i]) == 0) { 1654 netdev_err(netdev, "Unable to alloc receive buffers\n"); 1655 err = -ENOMEM; 1656 goto err_out_free_rq; 1657 } 1658 } 1659 1660 for (i = 0; i < enic->wq_count; i++) 1661 vnic_wq_enable(&enic->wq[i]); 1662 for (i = 0; i < enic->rq_count; i++) 1663 vnic_rq_enable(&enic->rq[i]); 1664 1665 if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) 1666 enic_dev_add_station_addr(enic); 1667 1668 enic_set_rx_mode(netdev); 1669 1670 netif_tx_wake_all_queues(netdev); 1671 1672 for (i = 0; i < enic->rq_count; i++) { 1673 enic_busy_poll_init_lock(&enic->rq[i]); 1674 napi_enable(&enic->napi[i]); 1675 } 1676 if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 1677 for (i = 0; i < enic->wq_count; i++) 1678 napi_enable(&enic->napi[enic_cq_wq(enic, i)]); 1679 enic_dev_enable(enic); 1680 1681 for (i = 0; i < enic->intr_count; i++) 1682 vnic_intr_unmask(&enic->intr[i]); 1683 1684 enic_notify_timer_start(enic); 1685 enic_rfs_flw_tbl_init(enic); 1686 1687 return 0; 1688 1689 err_out_free_rq: 1690 for (i = 0; i < enic->rq_count; i++) 1691 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); 1692 enic_dev_notify_unset(enic); 1693 err_out_free_intr: 1694 enic_free_intr(enic); 1695 1696 return err; 1697 } 1698 1699 /* rtnl lock is held, process context */ 1700 static int enic_stop(struct net_device *netdev) 1701 { 1702 struct enic *enic = netdev_priv(netdev); 1703 unsigned int i; 1704 int err; 1705 1706 for (i = 0; i < enic->intr_count; i++) { 1707 vnic_intr_mask(&enic->intr[i]); 1708 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */ 1709 } 1710 1711 enic_synchronize_irqs(enic); 1712 1713 del_timer_sync(&enic->notify_timer); 1714 enic_rfs_flw_tbl_free(enic); 1715 1716 enic_dev_disable(enic); 1717 1718 for (i = 0; i < enic->rq_count; i++) { 1719 napi_disable(&enic->napi[i]); 1720 local_bh_disable(); 1721 while (!enic_poll_lock_napi(&enic->rq[i])) 1722 mdelay(1); 1723 local_bh_enable(); 1724 } 1725 1726 netif_carrier_off(netdev); 1727 netif_tx_disable(netdev); 1728 if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 1729 for (i = 0; i < enic->wq_count; i++) 1730 napi_disable(&enic->napi[enic_cq_wq(enic, i)]); 1731 1732 if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) 1733 enic_dev_del_station_addr(enic); 1734 1735 for (i = 0; i < enic->wq_count; i++) { 1736 err = vnic_wq_disable(&enic->wq[i]); 1737 if (err) 1738 return err; 1739 } 1740 for (i = 0; i < enic->rq_count; i++) { 1741 err = vnic_rq_disable(&enic->rq[i]); 1742 if (err) 1743 return err; 1744 } 1745 1746 enic_dev_notify_unset(enic); 1747 enic_free_intr(enic); 1748 1749 for (i = 0; i < enic->wq_count; i++) 1750 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf); 1751 for (i = 0; i < enic->rq_count; i++) 1752 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); 1753 for (i = 0; i < enic->cq_count; i++) 1754 vnic_cq_clean(&enic->cq[i]); 1755 for (i = 0; i < enic->intr_count; i++) 1756 vnic_intr_clean(&enic->intr[i]); 1757 1758 return 0; 1759 } 1760 1761 static int enic_change_mtu(struct net_device *netdev, int new_mtu) 1762 { 1763 struct enic *enic = netdev_priv(netdev); 1764 int running = netif_running(netdev); 1765 1766 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU) 1767 return -EINVAL; 1768 1769 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) 1770 return -EOPNOTSUPP; 1771 1772 if (running) 1773 enic_stop(netdev); 1774 1775 netdev->mtu = new_mtu; 1776 1777 if (netdev->mtu > enic->port_mtu) 1778 netdev_warn(netdev, 1779 "interface MTU (%d) set higher than port MTU (%d)\n", 1780 netdev->mtu, enic->port_mtu); 1781 1782 if (running) 1783 enic_open(netdev); 1784 1785 return 0; 1786 } 1787 1788 static void enic_change_mtu_work(struct work_struct *work) 1789 { 1790 struct enic *enic = container_of(work, struct enic, change_mtu_work); 1791 struct net_device *netdev = enic->netdev; 1792 int new_mtu = vnic_dev_mtu(enic->vdev); 1793 int err; 1794 unsigned int i; 1795 1796 new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu)); 1797 1798 rtnl_lock(); 1799 1800 /* Stop RQ */ 1801 del_timer_sync(&enic->notify_timer); 1802 1803 for (i = 0; i < enic->rq_count; i++) 1804 napi_disable(&enic->napi[i]); 1805 1806 vnic_intr_mask(&enic->intr[0]); 1807 enic_synchronize_irqs(enic); 1808 err = vnic_rq_disable(&enic->rq[0]); 1809 if (err) { 1810 rtnl_unlock(); 1811 netdev_err(netdev, "Unable to disable RQ.\n"); 1812 return; 1813 } 1814 vnic_rq_clean(&enic->rq[0], enic_free_rq_buf); 1815 vnic_cq_clean(&enic->cq[0]); 1816 vnic_intr_clean(&enic->intr[0]); 1817 1818 /* Fill RQ with new_mtu-sized buffers */ 1819 netdev->mtu = new_mtu; 1820 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); 1821 /* Need at least one buffer on ring to get going */ 1822 if (vnic_rq_desc_used(&enic->rq[0]) == 0) { 1823 rtnl_unlock(); 1824 netdev_err(netdev, "Unable to alloc receive buffers.\n"); 1825 return; 1826 } 1827 1828 /* Start RQ */ 1829 vnic_rq_enable(&enic->rq[0]); 1830 napi_enable(&enic->napi[0]); 1831 vnic_intr_unmask(&enic->intr[0]); 1832 enic_notify_timer_start(enic); 1833 1834 rtnl_unlock(); 1835 1836 netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu); 1837 } 1838 1839 #ifdef CONFIG_NET_POLL_CONTROLLER 1840 static void enic_poll_controller(struct net_device *netdev) 1841 { 1842 struct enic *enic = netdev_priv(netdev); 1843 struct vnic_dev *vdev = enic->vdev; 1844 unsigned int i, intr; 1845 1846 switch (vnic_dev_get_intr_mode(vdev)) { 1847 case VNIC_DEV_INTR_MODE_MSIX: 1848 for (i = 0; i < enic->rq_count; i++) { 1849 intr = enic_msix_rq_intr(enic, i); 1850 enic_isr_msix(enic->msix_entry[intr].vector, 1851 &enic->napi[i]); 1852 } 1853 1854 for (i = 0; i < enic->wq_count; i++) { 1855 intr = enic_msix_wq_intr(enic, i); 1856 enic_isr_msix(enic->msix_entry[intr].vector, 1857 &enic->napi[enic_cq_wq(enic, i)]); 1858 } 1859 1860 break; 1861 case VNIC_DEV_INTR_MODE_MSI: 1862 enic_isr_msi(enic->pdev->irq, enic); 1863 break; 1864 case VNIC_DEV_INTR_MODE_INTX: 1865 enic_isr_legacy(enic->pdev->irq, netdev); 1866 break; 1867 default: 1868 break; 1869 } 1870 } 1871 #endif 1872 1873 static int enic_dev_wait(struct vnic_dev *vdev, 1874 int (*start)(struct vnic_dev *, int), 1875 int (*finished)(struct vnic_dev *, int *), 1876 int arg) 1877 { 1878 unsigned long time; 1879 int done; 1880 int err; 1881 1882 BUG_ON(in_interrupt()); 1883 1884 err = start(vdev, arg); 1885 if (err) 1886 return err; 1887 1888 /* Wait for func to complete...2 seconds max 1889 */ 1890 1891 time = jiffies + (HZ * 2); 1892 do { 1893 1894 err = finished(vdev, &done); 1895 if (err) 1896 return err; 1897 1898 if (done) 1899 return 0; 1900 1901 schedule_timeout_uninterruptible(HZ / 10); 1902 1903 } while (time_after(time, jiffies)); 1904 1905 return -ETIMEDOUT; 1906 } 1907 1908 static int enic_dev_open(struct enic *enic) 1909 { 1910 int err; 1911 1912 err = enic_dev_wait(enic->vdev, vnic_dev_open, 1913 vnic_dev_open_done, 0); 1914 if (err) 1915 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n", 1916 err); 1917 1918 return err; 1919 } 1920 1921 static int enic_dev_hang_reset(struct enic *enic) 1922 { 1923 int err; 1924 1925 err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset, 1926 vnic_dev_hang_reset_done, 0); 1927 if (err) 1928 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n", 1929 err); 1930 1931 return err; 1932 } 1933 1934 int __enic_set_rsskey(struct enic *enic) 1935 { 1936 union vnic_rss_key *rss_key_buf_va; 1937 dma_addr_t rss_key_buf_pa; 1938 int i, kidx, bidx, err; 1939 1940 rss_key_buf_va = pci_zalloc_consistent(enic->pdev, 1941 sizeof(union vnic_rss_key), 1942 &rss_key_buf_pa); 1943 if (!rss_key_buf_va) 1944 return -ENOMEM; 1945 1946 for (i = 0; i < ENIC_RSS_LEN; i++) { 1947 kidx = i / ENIC_RSS_BYTES_PER_KEY; 1948 bidx = i % ENIC_RSS_BYTES_PER_KEY; 1949 rss_key_buf_va->key[kidx].b[bidx] = enic->rss_key[i]; 1950 } 1951 spin_lock_bh(&enic->devcmd_lock); 1952 err = enic_set_rss_key(enic, 1953 rss_key_buf_pa, 1954 sizeof(union vnic_rss_key)); 1955 spin_unlock_bh(&enic->devcmd_lock); 1956 1957 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key), 1958 rss_key_buf_va, rss_key_buf_pa); 1959 1960 return err; 1961 } 1962 1963 static int enic_set_rsskey(struct enic *enic) 1964 { 1965 netdev_rss_key_fill(enic->rss_key, ENIC_RSS_LEN); 1966 1967 return __enic_set_rsskey(enic); 1968 } 1969 1970 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits) 1971 { 1972 dma_addr_t rss_cpu_buf_pa; 1973 union vnic_rss_cpu *rss_cpu_buf_va = NULL; 1974 unsigned int i; 1975 int err; 1976 1977 rss_cpu_buf_va = pci_alloc_consistent(enic->pdev, 1978 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa); 1979 if (!rss_cpu_buf_va) 1980 return -ENOMEM; 1981 1982 for (i = 0; i < (1 << rss_hash_bits); i++) 1983 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count; 1984 1985 spin_lock_bh(&enic->devcmd_lock); 1986 err = enic_set_rss_cpu(enic, 1987 rss_cpu_buf_pa, 1988 sizeof(union vnic_rss_cpu)); 1989 spin_unlock_bh(&enic->devcmd_lock); 1990 1991 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu), 1992 rss_cpu_buf_va, rss_cpu_buf_pa); 1993 1994 return err; 1995 } 1996 1997 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu, 1998 u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable) 1999 { 2000 const u8 tso_ipid_split_en = 0; 2001 const u8 ig_vlan_strip_en = 1; 2002 int err; 2003 2004 /* Enable VLAN tag stripping. 2005 */ 2006 2007 spin_lock_bh(&enic->devcmd_lock); 2008 err = enic_set_nic_cfg(enic, 2009 rss_default_cpu, rss_hash_type, 2010 rss_hash_bits, rss_base_cpu, 2011 rss_enable, tso_ipid_split_en, 2012 ig_vlan_strip_en); 2013 spin_unlock_bh(&enic->devcmd_lock); 2014 2015 return err; 2016 } 2017 2018 static int enic_set_rss_nic_cfg(struct enic *enic) 2019 { 2020 struct device *dev = enic_get_dev(enic); 2021 const u8 rss_default_cpu = 0; 2022 const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 | 2023 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 | 2024 NIC_CFG_RSS_HASH_TYPE_IPV6 | 2025 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6; 2026 const u8 rss_hash_bits = 7; 2027 const u8 rss_base_cpu = 0; 2028 u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1); 2029 2030 if (rss_enable) { 2031 if (!enic_set_rsskey(enic)) { 2032 if (enic_set_rsscpu(enic, rss_hash_bits)) { 2033 rss_enable = 0; 2034 dev_warn(dev, "RSS disabled, " 2035 "Failed to set RSS cpu indirection table."); 2036 } 2037 } else { 2038 rss_enable = 0; 2039 dev_warn(dev, "RSS disabled, Failed to set RSS key.\n"); 2040 } 2041 } 2042 2043 return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type, 2044 rss_hash_bits, rss_base_cpu, rss_enable); 2045 } 2046 2047 static void enic_reset(struct work_struct *work) 2048 { 2049 struct enic *enic = container_of(work, struct enic, reset); 2050 2051 if (!netif_running(enic->netdev)) 2052 return; 2053 2054 rtnl_lock(); 2055 2056 spin_lock(&enic->enic_api_lock); 2057 enic_dev_hang_notify(enic); 2058 enic_stop(enic->netdev); 2059 enic_dev_hang_reset(enic); 2060 enic_reset_addr_lists(enic); 2061 enic_init_vnic_resources(enic); 2062 enic_set_rss_nic_cfg(enic); 2063 enic_dev_set_ig_vlan_rewrite_mode(enic); 2064 enic_open(enic->netdev); 2065 spin_unlock(&enic->enic_api_lock); 2066 call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev); 2067 2068 rtnl_unlock(); 2069 } 2070 2071 static int enic_set_intr_mode(struct enic *enic) 2072 { 2073 unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX); 2074 unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX); 2075 unsigned int i; 2076 2077 /* Set interrupt mode (INTx, MSI, MSI-X) depending 2078 * on system capabilities. 2079 * 2080 * Try MSI-X first 2081 * 2082 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs 2083 * (the second to last INTR is used for WQ/RQ errors) 2084 * (the last INTR is used for notifications) 2085 */ 2086 2087 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2); 2088 for (i = 0; i < n + m + 2; i++) 2089 enic->msix_entry[i].entry = i; 2090 2091 /* Use multiple RQs if RSS is enabled 2092 */ 2093 2094 if (ENIC_SETTING(enic, RSS) && 2095 enic->config.intr_mode < 1 && 2096 enic->rq_count >= n && 2097 enic->wq_count >= m && 2098 enic->cq_count >= n + m && 2099 enic->intr_count >= n + m + 2) { 2100 2101 if (pci_enable_msix_range(enic->pdev, enic->msix_entry, 2102 n + m + 2, n + m + 2) > 0) { 2103 2104 enic->rq_count = n; 2105 enic->wq_count = m; 2106 enic->cq_count = n + m; 2107 enic->intr_count = n + m + 2; 2108 2109 vnic_dev_set_intr_mode(enic->vdev, 2110 VNIC_DEV_INTR_MODE_MSIX); 2111 2112 return 0; 2113 } 2114 } 2115 2116 if (enic->config.intr_mode < 1 && 2117 enic->rq_count >= 1 && 2118 enic->wq_count >= m && 2119 enic->cq_count >= 1 + m && 2120 enic->intr_count >= 1 + m + 2) { 2121 if (pci_enable_msix_range(enic->pdev, enic->msix_entry, 2122 1 + m + 2, 1 + m + 2) > 0) { 2123 2124 enic->rq_count = 1; 2125 enic->wq_count = m; 2126 enic->cq_count = 1 + m; 2127 enic->intr_count = 1 + m + 2; 2128 2129 vnic_dev_set_intr_mode(enic->vdev, 2130 VNIC_DEV_INTR_MODE_MSIX); 2131 2132 return 0; 2133 } 2134 } 2135 2136 /* Next try MSI 2137 * 2138 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR 2139 */ 2140 2141 if (enic->config.intr_mode < 2 && 2142 enic->rq_count >= 1 && 2143 enic->wq_count >= 1 && 2144 enic->cq_count >= 2 && 2145 enic->intr_count >= 1 && 2146 !pci_enable_msi(enic->pdev)) { 2147 2148 enic->rq_count = 1; 2149 enic->wq_count = 1; 2150 enic->cq_count = 2; 2151 enic->intr_count = 1; 2152 2153 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI); 2154 2155 return 0; 2156 } 2157 2158 /* Next try INTx 2159 * 2160 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs 2161 * (the first INTR is used for WQ/RQ) 2162 * (the second INTR is used for WQ/RQ errors) 2163 * (the last INTR is used for notifications) 2164 */ 2165 2166 if (enic->config.intr_mode < 3 && 2167 enic->rq_count >= 1 && 2168 enic->wq_count >= 1 && 2169 enic->cq_count >= 2 && 2170 enic->intr_count >= 3) { 2171 2172 enic->rq_count = 1; 2173 enic->wq_count = 1; 2174 enic->cq_count = 2; 2175 enic->intr_count = 3; 2176 2177 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX); 2178 2179 return 0; 2180 } 2181 2182 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2183 2184 return -EINVAL; 2185 } 2186 2187 static void enic_clear_intr_mode(struct enic *enic) 2188 { 2189 switch (vnic_dev_get_intr_mode(enic->vdev)) { 2190 case VNIC_DEV_INTR_MODE_MSIX: 2191 pci_disable_msix(enic->pdev); 2192 break; 2193 case VNIC_DEV_INTR_MODE_MSI: 2194 pci_disable_msi(enic->pdev); 2195 break; 2196 default: 2197 break; 2198 } 2199 2200 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); 2201 } 2202 2203 static const struct net_device_ops enic_netdev_dynamic_ops = { 2204 .ndo_open = enic_open, 2205 .ndo_stop = enic_stop, 2206 .ndo_start_xmit = enic_hard_start_xmit, 2207 .ndo_get_stats64 = enic_get_stats, 2208 .ndo_validate_addr = eth_validate_addr, 2209 .ndo_set_rx_mode = enic_set_rx_mode, 2210 .ndo_set_mac_address = enic_set_mac_address_dynamic, 2211 .ndo_change_mtu = enic_change_mtu, 2212 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2213 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2214 .ndo_tx_timeout = enic_tx_timeout, 2215 .ndo_set_vf_port = enic_set_vf_port, 2216 .ndo_get_vf_port = enic_get_vf_port, 2217 .ndo_set_vf_mac = enic_set_vf_mac, 2218 #ifdef CONFIG_NET_POLL_CONTROLLER 2219 .ndo_poll_controller = enic_poll_controller, 2220 #endif 2221 #ifdef CONFIG_RFS_ACCEL 2222 .ndo_rx_flow_steer = enic_rx_flow_steer, 2223 #endif 2224 #ifdef CONFIG_NET_RX_BUSY_POLL 2225 .ndo_busy_poll = enic_busy_poll, 2226 #endif 2227 }; 2228 2229 static const struct net_device_ops enic_netdev_ops = { 2230 .ndo_open = enic_open, 2231 .ndo_stop = enic_stop, 2232 .ndo_start_xmit = enic_hard_start_xmit, 2233 .ndo_get_stats64 = enic_get_stats, 2234 .ndo_validate_addr = eth_validate_addr, 2235 .ndo_set_mac_address = enic_set_mac_address, 2236 .ndo_set_rx_mode = enic_set_rx_mode, 2237 .ndo_change_mtu = enic_change_mtu, 2238 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, 2239 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, 2240 .ndo_tx_timeout = enic_tx_timeout, 2241 .ndo_set_vf_port = enic_set_vf_port, 2242 .ndo_get_vf_port = enic_get_vf_port, 2243 .ndo_set_vf_mac = enic_set_vf_mac, 2244 #ifdef CONFIG_NET_POLL_CONTROLLER 2245 .ndo_poll_controller = enic_poll_controller, 2246 #endif 2247 #ifdef CONFIG_RFS_ACCEL 2248 .ndo_rx_flow_steer = enic_rx_flow_steer, 2249 #endif 2250 #ifdef CONFIG_NET_RX_BUSY_POLL 2251 .ndo_busy_poll = enic_busy_poll, 2252 #endif 2253 }; 2254 2255 static void enic_dev_deinit(struct enic *enic) 2256 { 2257 unsigned int i; 2258 2259 for (i = 0; i < enic->rq_count; i++) { 2260 napi_hash_del(&enic->napi[i]); 2261 netif_napi_del(&enic->napi[i]); 2262 } 2263 if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) 2264 for (i = 0; i < enic->wq_count; i++) 2265 netif_napi_del(&enic->napi[enic_cq_wq(enic, i)]); 2266 2267 enic_free_vnic_resources(enic); 2268 enic_clear_intr_mode(enic); 2269 } 2270 2271 static void enic_kdump_kernel_config(struct enic *enic) 2272 { 2273 if (is_kdump_kernel()) { 2274 dev_info(enic_get_dev(enic), "Running from within kdump kernel. Using minimal resources\n"); 2275 enic->rq_count = 1; 2276 enic->wq_count = 1; 2277 enic->config.rq_desc_count = ENIC_MIN_RQ_DESCS; 2278 enic->config.wq_desc_count = ENIC_MIN_WQ_DESCS; 2279 enic->config.mtu = min_t(u16, 1500, enic->config.mtu); 2280 } 2281 } 2282 2283 static int enic_dev_init(struct enic *enic) 2284 { 2285 struct device *dev = enic_get_dev(enic); 2286 struct net_device *netdev = enic->netdev; 2287 unsigned int i; 2288 int err; 2289 2290 /* Get interrupt coalesce timer info */ 2291 err = enic_dev_intr_coal_timer_info(enic); 2292 if (err) { 2293 dev_warn(dev, "Using default conversion factor for " 2294 "interrupt coalesce timer\n"); 2295 vnic_dev_intr_coal_timer_info_default(enic->vdev); 2296 } 2297 2298 /* Get vNIC configuration 2299 */ 2300 2301 err = enic_get_vnic_config(enic); 2302 if (err) { 2303 dev_err(dev, "Get vNIC configuration failed, aborting\n"); 2304 return err; 2305 } 2306 2307 /* Get available resource counts 2308 */ 2309 2310 enic_get_res_counts(enic); 2311 2312 /* modify resource count if we are in kdump_kernel 2313 */ 2314 enic_kdump_kernel_config(enic); 2315 2316 /* Set interrupt mode based on resource counts and system 2317 * capabilities 2318 */ 2319 2320 err = enic_set_intr_mode(enic); 2321 if (err) { 2322 dev_err(dev, "Failed to set intr mode based on resource " 2323 "counts and system capabilities, aborting\n"); 2324 return err; 2325 } 2326 2327 /* Allocate and configure vNIC resources 2328 */ 2329 2330 err = enic_alloc_vnic_resources(enic); 2331 if (err) { 2332 dev_err(dev, "Failed to alloc vNIC resources, aborting\n"); 2333 goto err_out_free_vnic_resources; 2334 } 2335 2336 enic_init_vnic_resources(enic); 2337 2338 err = enic_set_rss_nic_cfg(enic); 2339 if (err) { 2340 dev_err(dev, "Failed to config nic, aborting\n"); 2341 goto err_out_free_vnic_resources; 2342 } 2343 2344 switch (vnic_dev_get_intr_mode(enic->vdev)) { 2345 default: 2346 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64); 2347 napi_hash_add(&enic->napi[0]); 2348 break; 2349 case VNIC_DEV_INTR_MODE_MSIX: 2350 for (i = 0; i < enic->rq_count; i++) { 2351 netif_napi_add(netdev, &enic->napi[i], 2352 enic_poll_msix_rq, NAPI_POLL_WEIGHT); 2353 napi_hash_add(&enic->napi[i]); 2354 } 2355 for (i = 0; i < enic->wq_count; i++) 2356 netif_napi_add(netdev, &enic->napi[enic_cq_wq(enic, i)], 2357 enic_poll_msix_wq, NAPI_POLL_WEIGHT); 2358 break; 2359 } 2360 2361 return 0; 2362 2363 err_out_free_vnic_resources: 2364 enic_clear_intr_mode(enic); 2365 enic_free_vnic_resources(enic); 2366 2367 return err; 2368 } 2369 2370 static void enic_iounmap(struct enic *enic) 2371 { 2372 unsigned int i; 2373 2374 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) 2375 if (enic->bar[i].vaddr) 2376 iounmap(enic->bar[i].vaddr); 2377 } 2378 2379 static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 2380 { 2381 struct device *dev = &pdev->dev; 2382 struct net_device *netdev; 2383 struct enic *enic; 2384 int using_dac = 0; 2385 unsigned int i; 2386 int err; 2387 #ifdef CONFIG_PCI_IOV 2388 int pos = 0; 2389 #endif 2390 int num_pps = 1; 2391 2392 /* Allocate net device structure and initialize. Private 2393 * instance data is initialized to zero. 2394 */ 2395 2396 netdev = alloc_etherdev_mqs(sizeof(struct enic), 2397 ENIC_RQ_MAX, ENIC_WQ_MAX); 2398 if (!netdev) 2399 return -ENOMEM; 2400 2401 pci_set_drvdata(pdev, netdev); 2402 2403 SET_NETDEV_DEV(netdev, &pdev->dev); 2404 2405 enic = netdev_priv(netdev); 2406 enic->netdev = netdev; 2407 enic->pdev = pdev; 2408 2409 /* Setup PCI resources 2410 */ 2411 2412 err = pci_enable_device_mem(pdev); 2413 if (err) { 2414 dev_err(dev, "Cannot enable PCI device, aborting\n"); 2415 goto err_out_free_netdev; 2416 } 2417 2418 err = pci_request_regions(pdev, DRV_NAME); 2419 if (err) { 2420 dev_err(dev, "Cannot request PCI regions, aborting\n"); 2421 goto err_out_disable_device; 2422 } 2423 2424 pci_set_master(pdev); 2425 2426 /* Query PCI controller on system for DMA addressing 2427 * limitation for the device. Try 64-bit first, and 2428 * fail to 32-bit. 2429 */ 2430 2431 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); 2432 if (err) { 2433 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 2434 if (err) { 2435 dev_err(dev, "No usable DMA configuration, aborting\n"); 2436 goto err_out_release_regions; 2437 } 2438 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 2439 if (err) { 2440 dev_err(dev, "Unable to obtain %u-bit DMA " 2441 "for consistent allocations, aborting\n", 32); 2442 goto err_out_release_regions; 2443 } 2444 } else { 2445 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 2446 if (err) { 2447 dev_err(dev, "Unable to obtain %u-bit DMA " 2448 "for consistent allocations, aborting\n", 64); 2449 goto err_out_release_regions; 2450 } 2451 using_dac = 1; 2452 } 2453 2454 /* Map vNIC resources from BAR0-5 2455 */ 2456 2457 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) { 2458 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM)) 2459 continue; 2460 enic->bar[i].len = pci_resource_len(pdev, i); 2461 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len); 2462 if (!enic->bar[i].vaddr) { 2463 dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i); 2464 err = -ENODEV; 2465 goto err_out_iounmap; 2466 } 2467 enic->bar[i].bus_addr = pci_resource_start(pdev, i); 2468 } 2469 2470 /* Register vNIC device 2471 */ 2472 2473 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar, 2474 ARRAY_SIZE(enic->bar)); 2475 if (!enic->vdev) { 2476 dev_err(dev, "vNIC registration failed, aborting\n"); 2477 err = -ENODEV; 2478 goto err_out_iounmap; 2479 } 2480 2481 #ifdef CONFIG_PCI_IOV 2482 /* Get number of subvnics */ 2483 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV); 2484 if (pos) { 2485 pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF, 2486 &enic->num_vfs); 2487 if (enic->num_vfs) { 2488 err = pci_enable_sriov(pdev, enic->num_vfs); 2489 if (err) { 2490 dev_err(dev, "SRIOV enable failed, aborting." 2491 " pci_enable_sriov() returned %d\n", 2492 err); 2493 goto err_out_vnic_unregister; 2494 } 2495 enic->priv_flags |= ENIC_SRIOV_ENABLED; 2496 num_pps = enic->num_vfs; 2497 } 2498 } 2499 #endif 2500 2501 /* Allocate structure for port profiles */ 2502 enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL); 2503 if (!enic->pp) { 2504 err = -ENOMEM; 2505 goto err_out_disable_sriov_pp; 2506 } 2507 2508 /* Issue device open to get device in known state 2509 */ 2510 2511 err = enic_dev_open(enic); 2512 if (err) { 2513 dev_err(dev, "vNIC dev open failed, aborting\n"); 2514 goto err_out_disable_sriov; 2515 } 2516 2517 /* Setup devcmd lock 2518 */ 2519 2520 spin_lock_init(&enic->devcmd_lock); 2521 spin_lock_init(&enic->enic_api_lock); 2522 2523 /* 2524 * Set ingress vlan rewrite mode before vnic initialization 2525 */ 2526 2527 err = enic_dev_set_ig_vlan_rewrite_mode(enic); 2528 if (err) { 2529 dev_err(dev, 2530 "Failed to set ingress vlan rewrite mode, aborting.\n"); 2531 goto err_out_dev_close; 2532 } 2533 2534 /* Issue device init to initialize the vnic-to-switch link. 2535 * We'll start with carrier off and wait for link UP 2536 * notification later to turn on carrier. We don't need 2537 * to wait here for the vnic-to-switch link initialization 2538 * to complete; link UP notification is the indication that 2539 * the process is complete. 2540 */ 2541 2542 netif_carrier_off(netdev); 2543 2544 /* Do not call dev_init for a dynamic vnic. 2545 * For a dynamic vnic, init_prov_info will be 2546 * called later by an upper layer. 2547 */ 2548 2549 if (!enic_is_dynamic(enic)) { 2550 err = vnic_dev_init(enic->vdev, 0); 2551 if (err) { 2552 dev_err(dev, "vNIC dev init failed, aborting\n"); 2553 goto err_out_dev_close; 2554 } 2555 } 2556 2557 err = enic_dev_init(enic); 2558 if (err) { 2559 dev_err(dev, "Device initialization failed, aborting\n"); 2560 goto err_out_dev_close; 2561 } 2562 2563 netif_set_real_num_tx_queues(netdev, enic->wq_count); 2564 netif_set_real_num_rx_queues(netdev, enic->rq_count); 2565 2566 /* Setup notification timer, HW reset task, and wq locks 2567 */ 2568 2569 init_timer(&enic->notify_timer); 2570 enic->notify_timer.function = enic_notify_timer; 2571 enic->notify_timer.data = (unsigned long)enic; 2572 2573 enic_set_rx_coal_setting(enic); 2574 INIT_WORK(&enic->reset, enic_reset); 2575 INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work); 2576 2577 for (i = 0; i < enic->wq_count; i++) 2578 spin_lock_init(&enic->wq_lock[i]); 2579 2580 /* Register net device 2581 */ 2582 2583 enic->port_mtu = enic->config.mtu; 2584 (void)enic_change_mtu(netdev, enic->port_mtu); 2585 2586 err = enic_set_mac_addr(netdev, enic->mac_addr); 2587 if (err) { 2588 dev_err(dev, "Invalid MAC address, aborting\n"); 2589 goto err_out_dev_deinit; 2590 } 2591 2592 enic->tx_coalesce_usecs = enic->config.intr_timer_usec; 2593 /* rx coalesce time already got initialized. This gets used 2594 * if adaptive coal is turned off 2595 */ 2596 enic->rx_coalesce_usecs = enic->tx_coalesce_usecs; 2597 2598 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) 2599 netdev->netdev_ops = &enic_netdev_dynamic_ops; 2600 else 2601 netdev->netdev_ops = &enic_netdev_ops; 2602 2603 netdev->watchdog_timeo = 2 * HZ; 2604 enic_set_ethtool_ops(netdev); 2605 2606 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; 2607 if (ENIC_SETTING(enic, LOOP)) { 2608 netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX; 2609 enic->loop_enable = 1; 2610 enic->loop_tag = enic->config.loop_tag; 2611 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag); 2612 } 2613 if (ENIC_SETTING(enic, TXCSUM)) 2614 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM; 2615 if (ENIC_SETTING(enic, TSO)) 2616 netdev->hw_features |= NETIF_F_TSO | 2617 NETIF_F_TSO6 | NETIF_F_TSO_ECN; 2618 if (ENIC_SETTING(enic, RSS)) 2619 netdev->hw_features |= NETIF_F_RXHASH; 2620 if (ENIC_SETTING(enic, RXCSUM)) 2621 netdev->hw_features |= NETIF_F_RXCSUM; 2622 2623 netdev->features |= netdev->hw_features; 2624 2625 #ifdef CONFIG_RFS_ACCEL 2626 netdev->hw_features |= NETIF_F_NTUPLE; 2627 #endif 2628 2629 if (using_dac) 2630 netdev->features |= NETIF_F_HIGHDMA; 2631 2632 netdev->priv_flags |= IFF_UNICAST_FLT; 2633 2634 err = register_netdev(netdev); 2635 if (err) { 2636 dev_err(dev, "Cannot register net device, aborting\n"); 2637 goto err_out_dev_deinit; 2638 } 2639 enic->rx_copybreak = RX_COPYBREAK_DEFAULT; 2640 2641 return 0; 2642 2643 err_out_dev_deinit: 2644 enic_dev_deinit(enic); 2645 err_out_dev_close: 2646 vnic_dev_close(enic->vdev); 2647 err_out_disable_sriov: 2648 kfree(enic->pp); 2649 err_out_disable_sriov_pp: 2650 #ifdef CONFIG_PCI_IOV 2651 if (enic_sriov_enabled(enic)) { 2652 pci_disable_sriov(pdev); 2653 enic->priv_flags &= ~ENIC_SRIOV_ENABLED; 2654 } 2655 err_out_vnic_unregister: 2656 #endif 2657 vnic_dev_unregister(enic->vdev); 2658 err_out_iounmap: 2659 enic_iounmap(enic); 2660 err_out_release_regions: 2661 pci_release_regions(pdev); 2662 err_out_disable_device: 2663 pci_disable_device(pdev); 2664 err_out_free_netdev: 2665 free_netdev(netdev); 2666 2667 return err; 2668 } 2669 2670 static void enic_remove(struct pci_dev *pdev) 2671 { 2672 struct net_device *netdev = pci_get_drvdata(pdev); 2673 2674 if (netdev) { 2675 struct enic *enic = netdev_priv(netdev); 2676 2677 cancel_work_sync(&enic->reset); 2678 cancel_work_sync(&enic->change_mtu_work); 2679 unregister_netdev(netdev); 2680 enic_dev_deinit(enic); 2681 vnic_dev_close(enic->vdev); 2682 #ifdef CONFIG_PCI_IOV 2683 if (enic_sriov_enabled(enic)) { 2684 pci_disable_sriov(pdev); 2685 enic->priv_flags &= ~ENIC_SRIOV_ENABLED; 2686 } 2687 #endif 2688 kfree(enic->pp); 2689 vnic_dev_unregister(enic->vdev); 2690 enic_iounmap(enic); 2691 pci_release_regions(pdev); 2692 pci_disable_device(pdev); 2693 free_netdev(netdev); 2694 } 2695 } 2696 2697 static struct pci_driver enic_driver = { 2698 .name = DRV_NAME, 2699 .id_table = enic_id_table, 2700 .probe = enic_probe, 2701 .remove = enic_remove, 2702 }; 2703 2704 static int __init enic_init_module(void) 2705 { 2706 pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); 2707 2708 return pci_register_driver(&enic_driver); 2709 } 2710 2711 static void __exit enic_cleanup_module(void) 2712 { 2713 pci_unregister_driver(&enic_driver); 2714 } 2715 2716 module_init(enic_init_module); 2717 module_exit(enic_cleanup_module); 2718