1/* 2 * Copyright 2008 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#include <linux/errno.h> 19#include <linux/pci.h> 20#include <linux/slab.h> 21#include <linux/skbuff.h> 22#include <linux/interrupt.h> 23#include <linux/spinlock.h> 24#include <linux/if_ether.h> 25#include <linux/if_vlan.h> 26#include <linux/workqueue.h> 27#include <scsi/fc/fc_fip.h> 28#include <scsi/fc/fc_els.h> 29#include <scsi/fc/fc_fcoe.h> 30#include <scsi/fc_frame.h> 31#include <scsi/libfc.h> 32#include "fnic_io.h" 33#include "fnic.h" 34#include "cq_enet_desc.h" 35#include "cq_exch_desc.h" 36 37struct workqueue_struct *fnic_event_queue; 38 39static void fnic_set_eth_mode(struct fnic *); 40 41void fnic_handle_link(struct work_struct *work) 42{ 43 struct fnic *fnic = container_of(work, struct fnic, link_work); 44 unsigned long flags; 45 int old_link_status; 46 u32 old_link_down_cnt; 47 48 spin_lock_irqsave(&fnic->fnic_lock, flags); 49 50 if (fnic->stop_rx_link_events) { 51 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 52 return; 53 } 54 55 old_link_down_cnt = fnic->link_down_cnt; 56 old_link_status = fnic->link_status; 57 fnic->link_status = vnic_dev_link_status(fnic->vdev); 58 fnic->link_down_cnt = vnic_dev_link_down_cnt(fnic->vdev); 59 60 if (old_link_status == fnic->link_status) { 61 if (!fnic->link_status) 62 /* DOWN -> DOWN */ 63 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 64 else { 65 if (old_link_down_cnt != fnic->link_down_cnt) { 66 /* UP -> DOWN -> UP */ 67 fnic->lport->host_stats.link_failure_count++; 68 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 69 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, 70 "link down\n"); 71 fcoe_ctlr_link_down(&fnic->ctlr); 72 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, 73 "link up\n"); 74 fcoe_ctlr_link_up(&fnic->ctlr); 75 } else 76 /* UP -> UP */ 77 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 78 } 79 } else if (fnic->link_status) { 80 /* DOWN -> UP */ 81 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 82 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n"); 83 fcoe_ctlr_link_up(&fnic->ctlr); 84 } else { 85 /* UP -> DOWN */ 86 fnic->lport->host_stats.link_failure_count++; 87 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 88 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n"); 89 fcoe_ctlr_link_down(&fnic->ctlr); 90 } 91 92} 93 94/* 95 * This function passes incoming fabric frames to libFC 96 */ 97void fnic_handle_frame(struct work_struct *work) 98{ 99 struct fnic *fnic = container_of(work, struct fnic, frame_work); 100 struct fc_lport *lp = fnic->lport; 101 unsigned long flags; 102 struct sk_buff *skb; 103 struct fc_frame *fp; 104 105 while ((skb = skb_dequeue(&fnic->frame_queue))) { 106 107 spin_lock_irqsave(&fnic->fnic_lock, flags); 108 if (fnic->stop_rx_link_events) { 109 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 110 dev_kfree_skb(skb); 111 return; 112 } 113 fp = (struct fc_frame *)skb; 114 115 /* 116 * If we're in a transitional state, just re-queue and return. 117 * The queue will be serviced when we get to a stable state. 118 */ 119 if (fnic->state != FNIC_IN_FC_MODE && 120 fnic->state != FNIC_IN_ETH_MODE) { 121 skb_queue_head(&fnic->frame_queue, skb); 122 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 123 return; 124 } 125 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 126 127 fc_exch_recv(lp, fp); 128 } 129} 130 131/** 132 * fnic_import_rq_eth_pkt() - handle received FCoE or FIP frame. 133 * @fnic: fnic instance. 134 * @skb: Ethernet Frame. 135 */ 136static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb) 137{ 138 struct fc_frame *fp; 139 struct ethhdr *eh; 140 struct fcoe_hdr *fcoe_hdr; 141 struct fcoe_crc_eof *ft; 142 143 /* 144 * Undo VLAN encapsulation if present. 145 */ 146 eh = (struct ethhdr *)skb->data; 147 if (eh->h_proto == htons(ETH_P_8021Q)) { 148 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2); 149 eh = (struct ethhdr *)skb_pull(skb, VLAN_HLEN); 150 skb_reset_mac_header(skb); 151 } 152 if (eh->h_proto == htons(ETH_P_FIP)) { 153 skb_pull(skb, sizeof(*eh)); 154 fcoe_ctlr_recv(&fnic->ctlr, skb); 155 return 1; /* let caller know packet was used */ 156 } 157 if (eh->h_proto != htons(ETH_P_FCOE)) 158 goto drop; 159 skb_set_network_header(skb, sizeof(*eh)); 160 skb_pull(skb, sizeof(*eh)); 161 162 fcoe_hdr = (struct fcoe_hdr *)skb->data; 163 if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER) 164 goto drop; 165 166 fp = (struct fc_frame *)skb; 167 fc_frame_init(fp); 168 fr_sof(fp) = fcoe_hdr->fcoe_sof; 169 skb_pull(skb, sizeof(struct fcoe_hdr)); 170 skb_reset_transport_header(skb); 171 172 ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft)); 173 fr_eof(fp) = ft->fcoe_eof; 174 skb_trim(skb, skb->len - sizeof(*ft)); 175 return 0; 176drop: 177 dev_kfree_skb_irq(skb); 178 return -1; 179} 180 181/** 182 * fnic_update_mac_locked() - set data MAC address and filters. 183 * @fnic: fnic instance. 184 * @new: newly-assigned FCoE MAC address. 185 * 186 * Called with the fnic lock held. 187 */ 188void fnic_update_mac_locked(struct fnic *fnic, u8 *new) 189{ 190 u8 *ctl = fnic->ctlr.ctl_src_addr; 191 u8 *data = fnic->data_src_addr; 192 193 if (is_zero_ether_addr(new)) 194 new = ctl; 195 if (!compare_ether_addr(data, new)) 196 return; 197 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new); 198 if (!is_zero_ether_addr(data) && compare_ether_addr(data, ctl)) 199 vnic_dev_del_addr(fnic->vdev, data); 200 memcpy(data, new, ETH_ALEN); 201 if (compare_ether_addr(new, ctl)) 202 vnic_dev_add_addr(fnic->vdev, new); 203} 204 205/** 206 * fnic_update_mac() - set data MAC address and filters. 207 * @lport: local port. 208 * @new: newly-assigned FCoE MAC address. 209 */ 210void fnic_update_mac(struct fc_lport *lport, u8 *new) 211{ 212 struct fnic *fnic = lport_priv(lport); 213 214 spin_lock_irq(&fnic->fnic_lock); 215 fnic_update_mac_locked(fnic, new); 216 spin_unlock_irq(&fnic->fnic_lock); 217} 218 219/** 220 * fnic_set_port_id() - set the port_ID after successful FLOGI. 221 * @lport: local port. 222 * @port_id: assigned FC_ID. 223 * @fp: received frame containing the FLOGI accept or NULL. 224 * 225 * This is called from libfc when a new FC_ID has been assigned. 226 * This causes us to reset the firmware to FC_MODE and setup the new MAC 227 * address and FC_ID. 228 * 229 * It is also called with FC_ID 0 when we're logged off. 230 * 231 * If the FC_ID is due to point-to-point, fp may be NULL. 232 */ 233void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp) 234{ 235 struct fnic *fnic = lport_priv(lport); 236 u8 *mac; 237 int ret; 238 239 FNIC_FCS_DBG(KERN_DEBUG, lport->host, "set port_id %x fp %p\n", 240 port_id, fp); 241 242 /* 243 * If we're clearing the FC_ID, change to use the ctl_src_addr. 244 * Set ethernet mode to send FLOGI. 245 */ 246 if (!port_id) { 247 fnic_update_mac(lport, fnic->ctlr.ctl_src_addr); 248 fnic_set_eth_mode(fnic); 249 return; 250 } 251 252 if (fp) { 253 mac = fr_cb(fp)->granted_mac; 254 if (is_zero_ether_addr(mac)) { 255 /* non-FIP - FLOGI already accepted - ignore return */ 256 fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp); 257 } 258 fnic_update_mac(lport, mac); 259 } 260 261 /* Change state to reflect transition to FC mode */ 262 spin_lock_irq(&fnic->fnic_lock); 263 if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE) 264 fnic->state = FNIC_IN_ETH_TRANS_FC_MODE; 265 else { 266 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, 267 "Unexpected fnic state %s while" 268 " processing flogi resp\n", 269 fnic_state_to_str(fnic->state)); 270 spin_unlock_irq(&fnic->fnic_lock); 271 return; 272 } 273 spin_unlock_irq(&fnic->fnic_lock); 274 275 /* 276 * Send FLOGI registration to firmware to set up FC mode. 277 * The new address will be set up when registration completes. 278 */ 279 ret = fnic_flogi_reg_handler(fnic, port_id); 280 281 if (ret < 0) { 282 spin_lock_irq(&fnic->fnic_lock); 283 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) 284 fnic->state = FNIC_IN_ETH_MODE; 285 spin_unlock_irq(&fnic->fnic_lock); 286 } 287} 288 289static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc 290 *cq_desc, struct vnic_rq_buf *buf, 291 int skipped __attribute__((unused)), 292 void *opaque) 293{ 294 struct fnic *fnic = vnic_dev_priv(rq->vdev); 295 struct sk_buff *skb; 296 struct fc_frame *fp; 297 unsigned int eth_hdrs_stripped; 298 u8 type, color, eop, sop, ingress_port, vlan_stripped; 299 u8 fcoe = 0, fcoe_sof, fcoe_eof; 300 u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0; 301 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; 302 u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc; 303 u8 fcs_ok = 1, packet_error = 0; 304 u16 q_number, completed_index, bytes_written = 0, vlan, checksum; 305 u32 rss_hash; 306 u16 exchange_id, tmpl; 307 u8 sof = 0; 308 u8 eof = 0; 309 u32 fcp_bytes_written = 0; 310 unsigned long flags; 311 312 pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len, 313 PCI_DMA_FROMDEVICE); 314 skb = buf->os_buf; 315 fp = (struct fc_frame *)skb; 316 buf->os_buf = NULL; 317 318 cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index); 319 if (type == CQ_DESC_TYPE_RQ_FCP) { 320 cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc, 321 &type, &color, &q_number, &completed_index, 322 &eop, &sop, &fcoe_fc_crc_ok, &exchange_id, 323 &tmpl, &fcp_bytes_written, &sof, &eof, 324 &ingress_port, &packet_error, 325 &fcoe_enc_error, &fcs_ok, &vlan_stripped, 326 &vlan); 327 eth_hdrs_stripped = 1; 328 skb_trim(skb, fcp_bytes_written); 329 fr_sof(fp) = sof; 330 fr_eof(fp) = eof; 331 332 } else if (type == CQ_DESC_TYPE_RQ_ENET) { 333 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, 334 &type, &color, &q_number, &completed_index, 335 &ingress_port, &fcoe, &eop, &sop, 336 &rss_type, &csum_not_calc, &rss_hash, 337 &bytes_written, &packet_error, 338 &vlan_stripped, &vlan, &checksum, 339 &fcoe_sof, &fcoe_fc_crc_ok, 340 &fcoe_enc_error, &fcoe_eof, 341 &tcp_udp_csum_ok, &udp, &tcp, 342 &ipv4_csum_ok, &ipv6, &ipv4, 343 &ipv4_fragment, &fcs_ok); 344 eth_hdrs_stripped = 0; 345 skb_trim(skb, bytes_written); 346 if (!fcs_ok) { 347 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, 348 "fcs error. dropping packet.\n"); 349 goto drop; 350 } 351 if (fnic_import_rq_eth_pkt(fnic, skb)) 352 return; 353 354 } else { 355 /* wrong CQ type*/ 356 shost_printk(KERN_ERR, fnic->lport->host, 357 "fnic rq_cmpl wrong cq type x%x\n", type); 358 goto drop; 359 } 360 361 if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) { 362 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, 363 "fnic rq_cmpl fcoe x%x fcsok x%x" 364 " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err" 365 " x%x\n", 366 fcoe, fcs_ok, packet_error, 367 fcoe_fc_crc_ok, fcoe_enc_error); 368 goto drop; 369 } 370 371 spin_lock_irqsave(&fnic->fnic_lock, flags); 372 if (fnic->stop_rx_link_events) { 373 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 374 goto drop; 375 } 376 fr_dev(fp) = fnic->lport; 377 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 378 379 skb_queue_tail(&fnic->frame_queue, skb); 380 queue_work(fnic_event_queue, &fnic->frame_work); 381 382 return; 383drop: 384 dev_kfree_skb_irq(skb); 385} 386 387static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev, 388 struct cq_desc *cq_desc, u8 type, 389 u16 q_number, u16 completed_index, 390 void *opaque) 391{ 392 struct fnic *fnic = vnic_dev_priv(vdev); 393 394 vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index, 395 VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv, 396 NULL); 397 return 0; 398} 399 400int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do) 401{ 402 unsigned int tot_rq_work_done = 0, cur_work_done; 403 unsigned int i; 404 int err; 405 406 for (i = 0; i < fnic->rq_count; i++) { 407 cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do, 408 fnic_rq_cmpl_handler_cont, 409 NULL); 410 if (cur_work_done) { 411 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame); 412 if (err) 413 shost_printk(KERN_ERR, fnic->lport->host, 414 "fnic_alloc_rq_frame cant alloc" 415 " frame\n"); 416 } 417 tot_rq_work_done += cur_work_done; 418 } 419 420 return tot_rq_work_done; 421} 422 423/* 424 * This function is called once at init time to allocate and fill RQ 425 * buffers. Subsequently, it is called in the interrupt context after RQ 426 * buffer processing to replenish the buffers in the RQ 427 */ 428int fnic_alloc_rq_frame(struct vnic_rq *rq) 429{ 430 struct fnic *fnic = vnic_dev_priv(rq->vdev); 431 struct sk_buff *skb; 432 u16 len; 433 dma_addr_t pa; 434 435 len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM; 436 skb = dev_alloc_skb(len); 437 if (!skb) { 438 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, 439 "Unable to allocate RQ sk_buff\n"); 440 return -ENOMEM; 441 } 442 skb_reset_mac_header(skb); 443 skb_reset_transport_header(skb); 444 skb_reset_network_header(skb); 445 skb_put(skb, len); 446 pa = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE); 447 fnic_queue_rq_desc(rq, skb, pa, len); 448 return 0; 449} 450 451void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) 452{ 453 struct fc_frame *fp = buf->os_buf; 454 struct fnic *fnic = vnic_dev_priv(rq->vdev); 455 456 pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len, 457 PCI_DMA_FROMDEVICE); 458 459 dev_kfree_skb(fp_skb(fp)); 460 buf->os_buf = NULL; 461} 462 463/** 464 * fnic_eth_send() - Send Ethernet frame. 465 * @fip: fcoe_ctlr instance. 466 * @skb: Ethernet Frame, FIP, without VLAN encapsulation. 467 */ 468void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb) 469{ 470 struct fnic *fnic = fnic_from_ctlr(fip); 471 struct vnic_wq *wq = &fnic->wq[0]; 472 dma_addr_t pa; 473 struct ethhdr *eth_hdr; 474 struct vlan_ethhdr *vlan_hdr; 475 unsigned long flags; 476 477 if (!fnic->vlan_hw_insert) { 478 eth_hdr = (struct ethhdr *)skb_mac_header(skb); 479 vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, 480 sizeof(*vlan_hdr) - sizeof(*eth_hdr)); 481 memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN); 482 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q); 483 vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto; 484 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id); 485 } 486 487 pa = pci_map_single(fnic->pdev, skb->data, skb->len, PCI_DMA_TODEVICE); 488 489 spin_lock_irqsave(&fnic->wq_lock[0], flags); 490 if (!vnic_wq_desc_avail(wq)) { 491 pci_unmap_single(fnic->pdev, pa, skb->len, PCI_DMA_TODEVICE); 492 spin_unlock_irqrestore(&fnic->wq_lock[0], flags); 493 kfree_skb(skb); 494 return; 495 } 496 497 fnic_queue_wq_eth_desc(wq, skb, pa, skb->len, 498 fnic->vlan_hw_insert, fnic->vlan_id, 1); 499 spin_unlock_irqrestore(&fnic->wq_lock[0], flags); 500} 501 502/* 503 * Send FC frame. 504 */ 505static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp) 506{ 507 struct vnic_wq *wq = &fnic->wq[0]; 508 struct sk_buff *skb; 509 dma_addr_t pa; 510 struct ethhdr *eth_hdr; 511 struct vlan_ethhdr *vlan_hdr; 512 struct fcoe_hdr *fcoe_hdr; 513 struct fc_frame_header *fh; 514 u32 tot_len, eth_hdr_len; 515 int ret = 0; 516 unsigned long flags; 517 518 fh = fc_frame_header_get(fp); 519 skb = fp_skb(fp); 520 521 if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) && 522 fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb)) 523 return 0; 524 525 if (!fnic->vlan_hw_insert) { 526 eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr); 527 vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, eth_hdr_len); 528 eth_hdr = (struct ethhdr *)vlan_hdr; 529 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q); 530 vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE); 531 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id); 532 fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1); 533 } else { 534 eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr); 535 eth_hdr = (struct ethhdr *)skb_push(skb, eth_hdr_len); 536 eth_hdr->h_proto = htons(ETH_P_FCOE); 537 fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1); 538 } 539 540 if (fnic->ctlr.map_dest) 541 fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id); 542 else 543 memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN); 544 memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN); 545 546 tot_len = skb->len; 547 BUG_ON(tot_len % 4); 548 549 memset(fcoe_hdr, 0, sizeof(*fcoe_hdr)); 550 fcoe_hdr->fcoe_sof = fr_sof(fp); 551 if (FC_FCOE_VER) 552 FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER); 553 554 pa = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE); 555 556 spin_lock_irqsave(&fnic->wq_lock[0], flags); 557 558 if (!vnic_wq_desc_avail(wq)) { 559 pci_unmap_single(fnic->pdev, pa, 560 tot_len, PCI_DMA_TODEVICE); 561 ret = -1; 562 goto fnic_send_frame_end; 563 } 564 565 fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp), 566 fnic->vlan_hw_insert, fnic->vlan_id, 1, 1, 1); 567fnic_send_frame_end: 568 spin_unlock_irqrestore(&fnic->wq_lock[0], flags); 569 570 if (ret) 571 dev_kfree_skb_any(fp_skb(fp)); 572 573 return ret; 574} 575 576/* 577 * fnic_send 578 * Routine to send a raw frame 579 */ 580int fnic_send(struct fc_lport *lp, struct fc_frame *fp) 581{ 582 struct fnic *fnic = lport_priv(lp); 583 unsigned long flags; 584 585 if (fnic->in_remove) { 586 dev_kfree_skb(fp_skb(fp)); 587 return -1; 588 } 589 590 /* 591 * Queue frame if in a transitional state. 592 * This occurs while registering the Port_ID / MAC address after FLOGI. 593 */ 594 spin_lock_irqsave(&fnic->fnic_lock, flags); 595 if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) { 596 skb_queue_tail(&fnic->tx_queue, fp_skb(fp)); 597 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 598 return 0; 599 } 600 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 601 602 return fnic_send_frame(fnic, fp); 603} 604 605/** 606 * fnic_flush_tx() - send queued frames. 607 * @fnic: fnic device 608 * 609 * Send frames that were waiting to go out in FC or Ethernet mode. 610 * Whenever changing modes we purge queued frames, so these frames should 611 * be queued for the stable mode that we're in, either FC or Ethernet. 612 * 613 * Called without fnic_lock held. 614 */ 615void fnic_flush_tx(struct fnic *fnic) 616{ 617 struct sk_buff *skb; 618 struct fc_frame *fp; 619 620 while ((skb = skb_dequeue(&fnic->tx_queue))) { 621 fp = (struct fc_frame *)skb; 622 fnic_send_frame(fnic, fp); 623 } 624} 625 626/** 627 * fnic_set_eth_mode() - put fnic into ethernet mode. 628 * @fnic: fnic device 629 * 630 * Called without fnic lock held. 631 */ 632static void fnic_set_eth_mode(struct fnic *fnic) 633{ 634 unsigned long flags; 635 enum fnic_state old_state; 636 int ret; 637 638 spin_lock_irqsave(&fnic->fnic_lock, flags); 639again: 640 old_state = fnic->state; 641 switch (old_state) { 642 case FNIC_IN_FC_MODE: 643 case FNIC_IN_ETH_TRANS_FC_MODE: 644 default: 645 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE; 646 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 647 648 ret = fnic_fw_reset_handler(fnic); 649 650 spin_lock_irqsave(&fnic->fnic_lock, flags); 651 if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE) 652 goto again; 653 if (ret) 654 fnic->state = old_state; 655 break; 656 657 case FNIC_IN_FC_TRANS_ETH_MODE: 658 case FNIC_IN_ETH_MODE: 659 break; 660 } 661 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 662} 663 664static void fnic_wq_complete_frame_send(struct vnic_wq *wq, 665 struct cq_desc *cq_desc, 666 struct vnic_wq_buf *buf, void *opaque) 667{ 668 struct sk_buff *skb = buf->os_buf; 669 struct fc_frame *fp = (struct fc_frame *)skb; 670 struct fnic *fnic = vnic_dev_priv(wq->vdev); 671 672 pci_unmap_single(fnic->pdev, buf->dma_addr, 673 buf->len, PCI_DMA_TODEVICE); 674 dev_kfree_skb_irq(fp_skb(fp)); 675 buf->os_buf = NULL; 676} 677 678static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev, 679 struct cq_desc *cq_desc, u8 type, 680 u16 q_number, u16 completed_index, 681 void *opaque) 682{ 683 struct fnic *fnic = vnic_dev_priv(vdev); 684 unsigned long flags; 685 686 spin_lock_irqsave(&fnic->wq_lock[q_number], flags); 687 vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index, 688 fnic_wq_complete_frame_send, NULL); 689 spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags); 690 691 return 0; 692} 693 694int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do) 695{ 696 unsigned int wq_work_done = 0; 697 unsigned int i; 698 699 for (i = 0; i < fnic->raw_wq_count; i++) { 700 wq_work_done += vnic_cq_service(&fnic->cq[fnic->rq_count+i], 701 work_to_do, 702 fnic_wq_cmpl_handler_cont, 703 NULL); 704 } 705 706 return wq_work_done; 707} 708 709 710void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) 711{ 712 struct fc_frame *fp = buf->os_buf; 713 struct fnic *fnic = vnic_dev_priv(wq->vdev); 714 715 pci_unmap_single(fnic->pdev, buf->dma_addr, 716 buf->len, PCI_DMA_TODEVICE); 717 718 dev_kfree_skb(fp_skb(fp)); 719 buf->os_buf = NULL; 720} 721