1/* 2 * Copyright (c) 2006 - 2011 Intel-NE, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 * 32 */ 33 34#include <linux/skbuff.h> 35#include <linux/etherdevice.h> 36#include <linux/kthread.h> 37#include <linux/ip.h> 38#include <linux/tcp.h> 39#include <net/tcp.h> 40#include "nes.h" 41#include "nes_mgt.h" 42 43atomic_t pau_qps_created; 44atomic_t pau_qps_destroyed; 45 46static void nes_replenish_mgt_rq(struct nes_vnic_mgt *mgtvnic) 47{ 48 unsigned long flags; 49 dma_addr_t bus_address; 50 struct sk_buff *skb; 51 struct nes_hw_nic_rq_wqe *nic_rqe; 52 struct nes_hw_mgt *nesmgt; 53 struct nes_device *nesdev; 54 struct nes_rskb_cb *cb; 55 u32 rx_wqes_posted = 0; 56 57 nesmgt = &mgtvnic->mgt; 58 nesdev = mgtvnic->nesvnic->nesdev; 59 spin_lock_irqsave(&nesmgt->rq_lock, flags); 60 if (nesmgt->replenishing_rq != 0) { 61 if (((nesmgt->rq_size - 1) == atomic_read(&mgtvnic->rx_skbs_needed)) && 62 (atomic_read(&mgtvnic->rx_skb_timer_running) == 0)) { 63 atomic_set(&mgtvnic->rx_skb_timer_running, 1); 64 spin_unlock_irqrestore(&nesmgt->rq_lock, flags); 65 mgtvnic->rq_wqes_timer.expires = jiffies + (HZ / 2); /* 1/2 second */ 66 add_timer(&mgtvnic->rq_wqes_timer); 67 } else { 68 spin_unlock_irqrestore(&nesmgt->rq_lock, flags); 69 } 70 return; 71 } 72 nesmgt->replenishing_rq = 1; 73 spin_unlock_irqrestore(&nesmgt->rq_lock, flags); 74 do { 75 skb = dev_alloc_skb(mgtvnic->nesvnic->max_frame_size); 76 if (skb) { 77 skb->dev = mgtvnic->nesvnic->netdev; 78 79 bus_address = pci_map_single(nesdev->pcidev, 80 skb->data, mgtvnic->nesvnic->max_frame_size, PCI_DMA_FROMDEVICE); 81 cb = (struct nes_rskb_cb *)&skb->cb[0]; 82 cb->busaddr = bus_address; 83 cb->maplen = mgtvnic->nesvnic->max_frame_size; 84 85 nic_rqe = &nesmgt->rq_vbase[mgtvnic->mgt.rq_head]; 86 nic_rqe->wqe_words[NES_NIC_RQ_WQE_LENGTH_1_0_IDX] = 87 cpu_to_le32(mgtvnic->nesvnic->max_frame_size); 88 nic_rqe->wqe_words[NES_NIC_RQ_WQE_LENGTH_3_2_IDX] = 0; 89 nic_rqe->wqe_words[NES_NIC_RQ_WQE_FRAG0_LOW_IDX] = 90 cpu_to_le32((u32)bus_address); 91 nic_rqe->wqe_words[NES_NIC_RQ_WQE_FRAG0_HIGH_IDX] = 92 cpu_to_le32((u32)((u64)bus_address >> 32)); 93 nesmgt->rx_skb[nesmgt->rq_head] = skb; 94 nesmgt->rq_head++; 95 nesmgt->rq_head &= nesmgt->rq_size - 1; 96 atomic_dec(&mgtvnic->rx_skbs_needed); 97 barrier(); 98 if (++rx_wqes_posted == 255) { 99 nes_write32(nesdev->regs + NES_WQE_ALLOC, (rx_wqes_posted << 24) | nesmgt->qp_id); 100 rx_wqes_posted = 0; 101 } 102 } else { 103 spin_lock_irqsave(&nesmgt->rq_lock, flags); 104 if (((nesmgt->rq_size - 1) == atomic_read(&mgtvnic->rx_skbs_needed)) && 105 (atomic_read(&mgtvnic->rx_skb_timer_running) == 0)) { 106 atomic_set(&mgtvnic->rx_skb_timer_running, 1); 107 spin_unlock_irqrestore(&nesmgt->rq_lock, flags); 108 mgtvnic->rq_wqes_timer.expires = jiffies + (HZ / 2); /* 1/2 second */ 109 add_timer(&mgtvnic->rq_wqes_timer); 110 } else { 111 spin_unlock_irqrestore(&nesmgt->rq_lock, flags); 112 } 113 break; 114 } 115 } while (atomic_read(&mgtvnic->rx_skbs_needed)); 116 barrier(); 117 if (rx_wqes_posted) 118 nes_write32(nesdev->regs + NES_WQE_ALLOC, (rx_wqes_posted << 24) | nesmgt->qp_id); 119 nesmgt->replenishing_rq = 0; 120} 121 122/** 123 * nes_mgt_rq_wqes_timeout 124 */ 125static void nes_mgt_rq_wqes_timeout(unsigned long parm) 126{ 127 struct nes_vnic_mgt *mgtvnic = (struct nes_vnic_mgt *)parm; 128 129 atomic_set(&mgtvnic->rx_skb_timer_running, 0); 130 if (atomic_read(&mgtvnic->rx_skbs_needed)) 131 nes_replenish_mgt_rq(mgtvnic); 132} 133 134/** 135 * nes_mgt_free_skb - unmap and free skb 136 */ 137static void nes_mgt_free_skb(struct nes_device *nesdev, struct sk_buff *skb, u32 dir) 138{ 139 struct nes_rskb_cb *cb; 140 141 cb = (struct nes_rskb_cb *)&skb->cb[0]; 142 pci_unmap_single(nesdev->pcidev, cb->busaddr, cb->maplen, dir); 143 cb->busaddr = 0; 144 dev_kfree_skb_any(skb); 145} 146 147/** 148 * nes_download_callback - handle download completions 149 */ 150static void nes_download_callback(struct nes_device *nesdev, struct nes_cqp_request *cqp_request) 151{ 152 struct pau_fpdu_info *fpdu_info = cqp_request->cqp_callback_pointer; 153 struct nes_qp *nesqp = fpdu_info->nesqp; 154 struct sk_buff *skb; 155 int i; 156 157 for (i = 0; i < fpdu_info->frag_cnt; i++) { 158 skb = fpdu_info->frags[i].skb; 159 if (fpdu_info->frags[i].cmplt) { 160 nes_mgt_free_skb(nesdev, skb, PCI_DMA_TODEVICE); 161 nes_rem_ref_cm_node(nesqp->cm_node); 162 } 163 } 164 165 if (fpdu_info->hdr_vbase) 166 pci_free_consistent(nesdev->pcidev, fpdu_info->hdr_len, 167 fpdu_info->hdr_vbase, fpdu_info->hdr_pbase); 168 kfree(fpdu_info); 169} 170 171/** 172 * nes_get_seq - Get the seq, ack_seq and window from the packet 173 */ 174static u32 nes_get_seq(struct sk_buff *skb, u32 *ack, u16 *wnd, u32 *fin_rcvd, u32 *rst_rcvd) 175{ 176 struct nes_rskb_cb *cb = (struct nes_rskb_cb *)&skb->cb[0]; 177 struct iphdr *iph = (struct iphdr *)(cb->data_start + ETH_HLEN); 178 struct tcphdr *tcph = (struct tcphdr *)(((char *)iph) + (4 * iph->ihl)); 179 180 *ack = be32_to_cpu(tcph->ack_seq); 181 *wnd = be16_to_cpu(tcph->window); 182 *fin_rcvd = tcph->fin; 183 *rst_rcvd = tcph->rst; 184 return be32_to_cpu(tcph->seq); 185} 186 187/** 188 * nes_get_next_skb - Get the next skb based on where current skb is in the queue 189 */ 190static struct sk_buff *nes_get_next_skb(struct nes_device *nesdev, struct nes_qp *nesqp, 191 struct sk_buff *skb, u32 nextseq, u32 *ack, 192 u16 *wnd, u32 *fin_rcvd, u32 *rst_rcvd) 193{ 194 u32 seq; 195 bool processacks; 196 struct sk_buff *old_skb; 197 198 if (skb) { 199 /* Continue processing fpdu */ 200 if (skb->next == (struct sk_buff *)&nesqp->pau_list) 201 goto out; 202 skb = skb->next; 203 processacks = false; 204 } else { 205 /* Starting a new one */ 206 if (skb_queue_empty(&nesqp->pau_list)) 207 goto out; 208 skb = skb_peek(&nesqp->pau_list); 209 processacks = true; 210 } 211 212 while (1) { 213 if (skb_queue_empty(&nesqp->pau_list)) 214 goto out; 215 216 seq = nes_get_seq(skb, ack, wnd, fin_rcvd, rst_rcvd); 217 if (seq == nextseq) { 218 if (skb->len || processacks) 219 break; 220 } else if (after(seq, nextseq)) { 221 goto out; 222 } 223 224 old_skb = skb; 225 skb = skb->next; 226 skb_unlink(old_skb, &nesqp->pau_list); 227 nes_mgt_free_skb(nesdev, old_skb, PCI_DMA_TODEVICE); 228 nes_rem_ref_cm_node(nesqp->cm_node); 229 if (skb == (struct sk_buff *)&nesqp->pau_list) 230 goto out; 231 } 232 return skb; 233 234out: 235 return NULL; 236} 237 238/** 239 * get_fpdu_info - Find the next complete fpdu and return its fragments. 240 */ 241static int get_fpdu_info(struct nes_device *nesdev, struct nes_qp *nesqp, 242 struct pau_fpdu_info **pau_fpdu_info) 243{ 244 struct sk_buff *skb; 245 struct iphdr *iph; 246 struct tcphdr *tcph; 247 struct nes_rskb_cb *cb; 248 struct pau_fpdu_info *fpdu_info = NULL; 249 struct pau_fpdu_frag frags[MAX_FPDU_FRAGS]; 250 u32 fpdu_len = 0; 251 u32 tmp_len; 252 int frag_cnt = 0; 253 u32 tot_len; 254 u32 frag_tot; 255 u32 ack; 256 u32 fin_rcvd; 257 u32 rst_rcvd; 258 u16 wnd; 259 int i; 260 int rc = 0; 261 262 *pau_fpdu_info = NULL; 263 264 skb = nes_get_next_skb(nesdev, nesqp, NULL, nesqp->pau_rcv_nxt, &ack, &wnd, &fin_rcvd, &rst_rcvd); 265 if (!skb) 266 goto out; 267 268 cb = (struct nes_rskb_cb *)&skb->cb[0]; 269 if (skb->len) { 270 fpdu_len = be16_to_cpu(*(__be16 *) skb->data) + MPA_FRAMING; 271 fpdu_len = (fpdu_len + 3) & 0xfffffffc; 272 tmp_len = fpdu_len; 273 274 /* See if we have all of the fpdu */ 275 frag_tot = 0; 276 memset(&frags, 0, sizeof frags); 277 for (i = 0; i < MAX_FPDU_FRAGS; i++) { 278 frags[i].physaddr = cb->busaddr; 279 frags[i].physaddr += skb->data - cb->data_start; 280 frags[i].frag_len = min(tmp_len, skb->len); 281 frags[i].skb = skb; 282 frags[i].cmplt = (skb->len == frags[i].frag_len); 283 frag_tot += frags[i].frag_len; 284 frag_cnt++; 285 286 tmp_len -= frags[i].frag_len; 287 if (tmp_len == 0) 288 break; 289 290 skb = nes_get_next_skb(nesdev, nesqp, skb, 291 nesqp->pau_rcv_nxt + frag_tot, &ack, &wnd, &fin_rcvd, &rst_rcvd); 292 if (!skb) 293 goto out; 294 if (rst_rcvd) { 295 /* rst received in the middle of fpdu */ 296 for (; i >= 0; i--) { 297 skb_unlink(frags[i].skb, &nesqp->pau_list); 298 nes_mgt_free_skb(nesdev, frags[i].skb, PCI_DMA_TODEVICE); 299 } 300 cb = (struct nes_rskb_cb *)&skb->cb[0]; 301 frags[0].physaddr = cb->busaddr; 302 frags[0].physaddr += skb->data - cb->data_start; 303 frags[0].frag_len = skb->len; 304 frags[0].skb = skb; 305 frags[0].cmplt = true; 306 frag_cnt = 1; 307 break; 308 } 309 310 cb = (struct nes_rskb_cb *)&skb->cb[0]; 311 } 312 } else { 313 /* no data */ 314 frags[0].physaddr = cb->busaddr; 315 frags[0].frag_len = 0; 316 frags[0].skb = skb; 317 frags[0].cmplt = true; 318 frag_cnt = 1; 319 } 320 321 /* Found one */ 322 fpdu_info = kzalloc(sizeof(*fpdu_info), GFP_ATOMIC); 323 if (fpdu_info == NULL) { 324 nes_debug(NES_DBG_PAU, "Failed to alloc a fpdu_info.\n"); 325 rc = -ENOMEM; 326 goto out; 327 } 328 329 fpdu_info->cqp_request = nes_get_cqp_request(nesdev); 330 if (fpdu_info->cqp_request == NULL) { 331 nes_debug(NES_DBG_PAU, "Failed to get a cqp_request.\n"); 332 rc = -ENOMEM; 333 goto out; 334 } 335 336 cb = (struct nes_rskb_cb *)&frags[0].skb->cb[0]; 337 iph = (struct iphdr *)(cb->data_start + ETH_HLEN); 338 tcph = (struct tcphdr *)(((char *)iph) + (4 * iph->ihl)); 339 fpdu_info->hdr_len = (((unsigned char *)tcph) + 4 * (tcph->doff)) - cb->data_start; 340 fpdu_info->data_len = fpdu_len; 341 tot_len = fpdu_info->hdr_len + fpdu_len - ETH_HLEN; 342 343 if (frags[0].cmplt) { 344 fpdu_info->hdr_pbase = cb->busaddr; 345 fpdu_info->hdr_vbase = NULL; 346 } else { 347 fpdu_info->hdr_vbase = pci_alloc_consistent(nesdev->pcidev, 348 fpdu_info->hdr_len, &fpdu_info->hdr_pbase); 349 if (!fpdu_info->hdr_vbase) { 350 nes_debug(NES_DBG_PAU, "Unable to allocate memory for pau first frag\n"); 351 rc = -ENOMEM; 352 goto out; 353 } 354 355 /* Copy hdrs, adjusting len and seqnum */ 356 memcpy(fpdu_info->hdr_vbase, cb->data_start, fpdu_info->hdr_len); 357 iph = (struct iphdr *)(fpdu_info->hdr_vbase + ETH_HLEN); 358 tcph = (struct tcphdr *)(((char *)iph) + (4 * iph->ihl)); 359 } 360 361 iph->tot_len = cpu_to_be16(tot_len); 362 iph->saddr = cpu_to_be32(0x7f000001); 363 364 tcph->seq = cpu_to_be32(nesqp->pau_rcv_nxt); 365 tcph->ack_seq = cpu_to_be32(ack); 366 tcph->window = cpu_to_be16(wnd); 367 368 nesqp->pau_rcv_nxt += fpdu_len + fin_rcvd; 369 370 memcpy(fpdu_info->frags, frags, sizeof(fpdu_info->frags)); 371 fpdu_info->frag_cnt = frag_cnt; 372 fpdu_info->nesqp = nesqp; 373 *pau_fpdu_info = fpdu_info; 374 375 /* Update skb's for next pass */ 376 for (i = 0; i < frag_cnt; i++) { 377 cb = (struct nes_rskb_cb *)&frags[i].skb->cb[0]; 378 skb_pull(frags[i].skb, frags[i].frag_len); 379 380 if (frags[i].skb->len == 0) { 381 /* Pull skb off the list - it will be freed in the callback */ 382 if (!skb_queue_empty(&nesqp->pau_list)) 383 skb_unlink(frags[i].skb, &nesqp->pau_list); 384 } else { 385 /* Last skb still has data so update the seq */ 386 iph = (struct iphdr *)(cb->data_start + ETH_HLEN); 387 tcph = (struct tcphdr *)(((char *)iph) + (4 * iph->ihl)); 388 tcph->seq = cpu_to_be32(nesqp->pau_rcv_nxt); 389 } 390 } 391 392out: 393 if (rc) { 394 if (fpdu_info) { 395 if (fpdu_info->cqp_request) 396 nes_put_cqp_request(nesdev, fpdu_info->cqp_request); 397 kfree(fpdu_info); 398 } 399 } 400 return rc; 401} 402 403/** 404 * forward_fpdu - send complete fpdus, one at a time 405 */ 406static int forward_fpdus(struct nes_vnic *nesvnic, struct nes_qp *nesqp) 407{ 408 struct nes_device *nesdev = nesvnic->nesdev; 409 struct pau_fpdu_info *fpdu_info; 410 struct nes_hw_cqp_wqe *cqp_wqe; 411 struct nes_cqp_request *cqp_request; 412 unsigned long flags; 413 u64 u64tmp; 414 u32 u32tmp; 415 int rc; 416 417 while (1) { 418 spin_lock_irqsave(&nesqp->pau_lock, flags); 419 rc = get_fpdu_info(nesdev, nesqp, &fpdu_info); 420 if (rc || (fpdu_info == NULL)) { 421 spin_unlock_irqrestore(&nesqp->pau_lock, flags); 422 return rc; 423 } 424 425 cqp_request = fpdu_info->cqp_request; 426 cqp_wqe = &cqp_request->cqp_wqe; 427 nes_fill_init_cqp_wqe(cqp_wqe, nesdev); 428 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_DL_OPCODE_IDX, 429 NES_CQP_DOWNLOAD_SEGMENT | 430 (((u32)nesvnic->logical_port) << NES_CQP_OP_LOGICAL_PORT_SHIFT)); 431 432 u32tmp = fpdu_info->hdr_len << 16; 433 u32tmp |= fpdu_info->hdr_len + (u32)fpdu_info->data_len; 434 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_DL_LENGTH_0_TOTAL_IDX, 435 u32tmp); 436 437 u32tmp = (fpdu_info->frags[1].frag_len << 16) | fpdu_info->frags[0].frag_len; 438 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_LENGTH_2_1_IDX, 439 u32tmp); 440 441 u32tmp = (fpdu_info->frags[3].frag_len << 16) | fpdu_info->frags[2].frag_len; 442 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_LENGTH_4_3_IDX, 443 u32tmp); 444 445 u64tmp = (u64)fpdu_info->hdr_pbase; 446 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG0_LOW_IDX, 447 lower_32_bits(u64tmp)); 448 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG0_HIGH_IDX, 449 upper_32_bits(u64tmp)); 450 451 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG1_LOW_IDX, 452 lower_32_bits(fpdu_info->frags[0].physaddr)); 453 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG1_HIGH_IDX, 454 upper_32_bits(fpdu_info->frags[0].physaddr)); 455 456 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG2_LOW_IDX, 457 lower_32_bits(fpdu_info->frags[1].physaddr)); 458 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG2_HIGH_IDX, 459 upper_32_bits(fpdu_info->frags[1].physaddr)); 460 461 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG3_LOW_IDX, 462 lower_32_bits(fpdu_info->frags[2].physaddr)); 463 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG3_HIGH_IDX, 464 upper_32_bits(fpdu_info->frags[2].physaddr)); 465 466 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG4_LOW_IDX, 467 lower_32_bits(fpdu_info->frags[3].physaddr)); 468 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG4_HIGH_IDX, 469 upper_32_bits(fpdu_info->frags[3].physaddr)); 470 471 cqp_request->cqp_callback_pointer = fpdu_info; 472 cqp_request->callback = 1; 473 cqp_request->cqp_callback = nes_download_callback; 474 475 atomic_set(&cqp_request->refcount, 1); 476 nes_post_cqp_request(nesdev, cqp_request); 477 spin_unlock_irqrestore(&nesqp->pau_lock, flags); 478 } 479 480 return 0; 481} 482 483static void process_fpdus(struct nes_vnic *nesvnic, struct nes_qp *nesqp) 484{ 485 int again = 1; 486 unsigned long flags; 487 488 do { 489 /* Ignore rc - if it failed, tcp retries will cause it to try again */ 490 forward_fpdus(nesvnic, nesqp); 491 492 spin_lock_irqsave(&nesqp->pau_lock, flags); 493 if (nesqp->pau_pending) { 494 nesqp->pau_pending = 0; 495 } else { 496 nesqp->pau_busy = 0; 497 again = 0; 498 } 499 500 spin_unlock_irqrestore(&nesqp->pau_lock, flags); 501 } while (again); 502} 503 504/** 505 * queue_fpdus - Handle fpdu's that hw passed up to sw 506 */ 507static void queue_fpdus(struct sk_buff *skb, struct nes_vnic *nesvnic, struct nes_qp *nesqp) 508{ 509 struct sk_buff *tmpskb; 510 struct nes_rskb_cb *cb; 511 struct iphdr *iph; 512 struct tcphdr *tcph; 513 unsigned char *tcph_end; 514 u32 rcv_nxt; 515 u32 rcv_wnd; 516 u32 seqnum; 517 u32 len; 518 bool process_it = false; 519 unsigned long flags; 520 521 /* Move data ptr to after tcp header */ 522 iph = (struct iphdr *)skb->data; 523 tcph = (struct tcphdr *)(((char *)iph) + (4 * iph->ihl)); 524 seqnum = be32_to_cpu(tcph->seq); 525 tcph_end = (((char *)tcph) + (4 * tcph->doff)); 526 527 len = be16_to_cpu(iph->tot_len); 528 if (skb->len > len) 529 skb_trim(skb, len); 530 skb_pull(skb, tcph_end - skb->data); 531 532 /* Initialize tracking values */ 533 cb = (struct nes_rskb_cb *)&skb->cb[0]; 534 cb->seqnum = seqnum; 535 536 /* Make sure data is in the receive window */ 537 rcv_nxt = nesqp->pau_rcv_nxt; 538 rcv_wnd = le32_to_cpu(nesqp->nesqp_context->rcv_wnd); 539 if (!between(seqnum, rcv_nxt, (rcv_nxt + rcv_wnd))) { 540 nes_mgt_free_skb(nesvnic->nesdev, skb, PCI_DMA_TODEVICE); 541 nes_rem_ref_cm_node(nesqp->cm_node); 542 return; 543 } 544 545 spin_lock_irqsave(&nesqp->pau_lock, flags); 546 547 if (nesqp->pau_busy) 548 nesqp->pau_pending = 1; 549 else 550 nesqp->pau_busy = 1; 551 552 /* Queue skb by sequence number */ 553 if (skb_queue_len(&nesqp->pau_list) == 0) { 554 skb_queue_head(&nesqp->pau_list, skb); 555 } else { 556 tmpskb = nesqp->pau_list.next; 557 while (tmpskb != (struct sk_buff *)&nesqp->pau_list) { 558 cb = (struct nes_rskb_cb *)&tmpskb->cb[0]; 559 if (before(seqnum, cb->seqnum)) 560 break; 561 tmpskb = tmpskb->next; 562 } 563 skb_insert(tmpskb, skb, &nesqp->pau_list); 564 } 565 if (nesqp->pau_state == PAU_READY) 566 process_it = true; 567 spin_unlock_irqrestore(&nesqp->pau_lock, flags); 568 569 if (process_it) 570 process_fpdus(nesvnic, nesqp); 571 572 return; 573} 574 575/** 576 * mgt_thread - Handle mgt skbs in a safe context 577 */ 578static int mgt_thread(void *context) 579{ 580 struct nes_vnic *nesvnic = context; 581 struct sk_buff *skb; 582 struct nes_rskb_cb *cb; 583 584 while (!kthread_should_stop()) { 585 wait_event_interruptible(nesvnic->mgt_wait_queue, 586 skb_queue_len(&nesvnic->mgt_skb_list) || kthread_should_stop()); 587 while ((skb_queue_len(&nesvnic->mgt_skb_list)) && !kthread_should_stop()) { 588 skb = skb_dequeue(&nesvnic->mgt_skb_list); 589 cb = (struct nes_rskb_cb *)&skb->cb[0]; 590 cb->data_start = skb->data - ETH_HLEN; 591 cb->busaddr = pci_map_single(nesvnic->nesdev->pcidev, cb->data_start, 592 nesvnic->max_frame_size, PCI_DMA_TODEVICE); 593 queue_fpdus(skb, nesvnic, cb->nesqp); 594 } 595 } 596 597 /* Closing down so delete any entries on the queue */ 598 while (skb_queue_len(&nesvnic->mgt_skb_list)) { 599 skb = skb_dequeue(&nesvnic->mgt_skb_list); 600 cb = (struct nes_rskb_cb *)&skb->cb[0]; 601 nes_rem_ref_cm_node(cb->nesqp->cm_node); 602 dev_kfree_skb_any(skb); 603 } 604 return 0; 605} 606 607/** 608 * nes_queue_skbs - Queue skb so it can be handled in a thread context 609 */ 610void nes_queue_mgt_skbs(struct sk_buff *skb, struct nes_vnic *nesvnic, struct nes_qp *nesqp) 611{ 612 struct nes_rskb_cb *cb; 613 614 cb = (struct nes_rskb_cb *)&skb->cb[0]; 615 cb->nesqp = nesqp; 616 skb_queue_tail(&nesvnic->mgt_skb_list, skb); 617 wake_up_interruptible(&nesvnic->mgt_wait_queue); 618} 619 620void nes_destroy_pau_qp(struct nes_device *nesdev, struct nes_qp *nesqp) 621{ 622 struct sk_buff *skb; 623 unsigned long flags; 624 atomic_inc(&pau_qps_destroyed); 625 626 /* Free packets that have not yet been forwarded */ 627 /* Lock is acquired by skb_dequeue when removing the skb */ 628 spin_lock_irqsave(&nesqp->pau_lock, flags); 629 while (skb_queue_len(&nesqp->pau_list)) { 630 skb = skb_dequeue(&nesqp->pau_list); 631 nes_mgt_free_skb(nesdev, skb, PCI_DMA_TODEVICE); 632 nes_rem_ref_cm_node(nesqp->cm_node); 633 } 634 spin_unlock_irqrestore(&nesqp->pau_lock, flags); 635} 636 637static void nes_chg_qh_handler(struct nes_device *nesdev, struct nes_cqp_request *cqp_request) 638{ 639 struct pau_qh_chg *qh_chg = cqp_request->cqp_callback_pointer; 640 struct nes_cqp_request *new_request; 641 struct nes_hw_cqp_wqe *cqp_wqe; 642 struct nes_adapter *nesadapter; 643 struct nes_qp *nesqp; 644 struct nes_v4_quad nes_quad; 645 u32 crc_value; 646 u64 u64temp; 647 648 nesadapter = nesdev->nesadapter; 649 nesqp = qh_chg->nesqp; 650 651 /* Should we handle the bad completion */ 652 if (cqp_request->major_code) 653 WARN(1, PFX "Invalid cqp_request major_code=0x%x\n", 654 cqp_request->major_code); 655 656 switch (nesqp->pau_state) { 657 case PAU_DEL_QH: 658 /* Old hash code deleted, now set the new one */ 659 nesqp->pau_state = PAU_ADD_LB_QH; 660 new_request = nes_get_cqp_request(nesdev); 661 if (new_request == NULL) { 662 nes_debug(NES_DBG_PAU, "Failed to get a new_request.\n"); 663 WARN_ON(1); 664 return; 665 } 666 667 memset(&nes_quad, 0, sizeof(nes_quad)); 668 nes_quad.DstIpAdrIndex = 669 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24); 670 nes_quad.SrcIpadr = cpu_to_be32(0x7f000001); 671 nes_quad.TcpPorts[0] = swab16(nesqp->nesqp_context->tcpPorts[1]); 672 nes_quad.TcpPorts[1] = swab16(nesqp->nesqp_context->tcpPorts[0]); 673 674 /* Produce hash key */ 675 crc_value = get_crc_value(&nes_quad); 676 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff); 677 nes_debug(NES_DBG_PAU, "new HTE Index = 0x%08X, CRC = 0x%08X\n", 678 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask); 679 680 nesqp->hte_index &= nesadapter->hte_index_mask; 681 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index); 682 nesqp->nesqp_context->ip0 = cpu_to_le32(0x7f000001); 683 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(nesqp->pau_rcv_nxt); 684 685 cqp_wqe = &new_request->cqp_wqe; 686 nes_fill_init_cqp_wqe(cqp_wqe, nesdev); 687 set_wqe_32bit_value(cqp_wqe->wqe_words, 688 NES_CQP_WQE_OPCODE_IDX, NES_CQP_MANAGE_QUAD_HASH | 689 NES_CQP_QP_TYPE_IWARP | NES_CQP_QP_CONTEXT_VALID | NES_CQP_QP_IWARP_STATE_RTS); 690 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id); 691 u64temp = (u64)nesqp->nesqp_context_pbase; 692 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp); 693 694 nes_debug(NES_DBG_PAU, "Waiting for CQP completion for adding the quad hash.\n"); 695 696 new_request->cqp_callback_pointer = qh_chg; 697 new_request->callback = 1; 698 new_request->cqp_callback = nes_chg_qh_handler; 699 atomic_set(&new_request->refcount, 1); 700 nes_post_cqp_request(nesdev, new_request); 701 break; 702 703 case PAU_ADD_LB_QH: 704 /* Start processing the queued fpdu's */ 705 nesqp->pau_state = PAU_READY; 706 process_fpdus(qh_chg->nesvnic, qh_chg->nesqp); 707 kfree(qh_chg); 708 break; 709 } 710} 711 712/** 713 * nes_change_quad_hash 714 */ 715static int nes_change_quad_hash(struct nes_device *nesdev, 716 struct nes_vnic *nesvnic, struct nes_qp *nesqp) 717{ 718 struct nes_cqp_request *cqp_request = NULL; 719 struct pau_qh_chg *qh_chg = NULL; 720 u64 u64temp; 721 struct nes_hw_cqp_wqe *cqp_wqe; 722 int ret = 0; 723 724 cqp_request = nes_get_cqp_request(nesdev); 725 if (cqp_request == NULL) { 726 nes_debug(NES_DBG_PAU, "Failed to get a cqp_request.\n"); 727 ret = -ENOMEM; 728 goto chg_qh_err; 729 } 730 731 qh_chg = kmalloc(sizeof *qh_chg, GFP_ATOMIC); 732 if (qh_chg == NULL) { 733 nes_debug(NES_DBG_PAU, "Failed to get a cqp_request.\n"); 734 ret = -ENOMEM; 735 goto chg_qh_err; 736 } 737 qh_chg->nesdev = nesdev; 738 qh_chg->nesvnic = nesvnic; 739 qh_chg->nesqp = nesqp; 740 nesqp->pau_state = PAU_DEL_QH; 741 742 cqp_wqe = &cqp_request->cqp_wqe; 743 nes_fill_init_cqp_wqe(cqp_wqe, nesdev); 744 set_wqe_32bit_value(cqp_wqe->wqe_words, 745 NES_CQP_WQE_OPCODE_IDX, NES_CQP_MANAGE_QUAD_HASH | NES_CQP_QP_DEL_HTE | 746 NES_CQP_QP_TYPE_IWARP | NES_CQP_QP_CONTEXT_VALID | NES_CQP_QP_IWARP_STATE_RTS); 747 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id); 748 u64temp = (u64)nesqp->nesqp_context_pbase; 749 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp); 750 751 nes_debug(NES_DBG_PAU, "Waiting for CQP completion for deleting the quad hash.\n"); 752 753 cqp_request->cqp_callback_pointer = qh_chg; 754 cqp_request->callback = 1; 755 cqp_request->cqp_callback = nes_chg_qh_handler; 756 atomic_set(&cqp_request->refcount, 1); 757 nes_post_cqp_request(nesdev, cqp_request); 758 759 return ret; 760 761chg_qh_err: 762 kfree(qh_chg); 763 if (cqp_request) 764 nes_put_cqp_request(nesdev, cqp_request); 765 return ret; 766} 767 768/** 769 * nes_mgt_ce_handler 770 * This management code deals with any packed and unaligned (pau) fpdu's 771 * that the hardware cannot handle. 772 */ 773static void nes_mgt_ce_handler(struct nes_device *nesdev, struct nes_hw_nic_cq *cq) 774{ 775 struct nes_vnic_mgt *mgtvnic = container_of(cq, struct nes_vnic_mgt, mgt_cq); 776 struct nes_adapter *nesadapter = nesdev->nesadapter; 777 u32 head; 778 u32 cq_size; 779 u32 cqe_count = 0; 780 u32 cqe_misc; 781 u32 qp_id = 0; 782 u32 skbs_needed; 783 unsigned long context; 784 struct nes_qp *nesqp; 785 struct sk_buff *rx_skb; 786 struct nes_rskb_cb *cb; 787 788 head = cq->cq_head; 789 cq_size = cq->cq_size; 790 791 while (1) { 792 cqe_misc = le32_to_cpu(cq->cq_vbase[head].cqe_words[NES_NIC_CQE_MISC_IDX]); 793 if (!(cqe_misc & NES_NIC_CQE_VALID)) 794 break; 795 796 nesqp = NULL; 797 if (cqe_misc & NES_NIC_CQE_ACCQP_VALID) { 798 qp_id = le32_to_cpu(cq->cq_vbase[head].cqe_words[NES_NIC_CQE_ACCQP_ID_IDX]); 799 qp_id &= 0x001fffff; 800 if (qp_id < nesadapter->max_qp) { 801 context = (unsigned long)nesadapter->qp_table[qp_id - NES_FIRST_QPN]; 802 nesqp = (struct nes_qp *)context; 803 } 804 } 805 806 if (nesqp) { 807 if (nesqp->pau_mode == false) { 808 nesqp->pau_mode = true; /* First time for this qp */ 809 nesqp->pau_rcv_nxt = le32_to_cpu( 810 cq->cq_vbase[head].cqe_words[NES_NIC_CQE_HASH_RCVNXT]); 811 skb_queue_head_init(&nesqp->pau_list); 812 spin_lock_init(&nesqp->pau_lock); 813 atomic_inc(&pau_qps_created); 814 nes_change_quad_hash(nesdev, mgtvnic->nesvnic, nesqp); 815 } 816 817 rx_skb = mgtvnic->mgt.rx_skb[mgtvnic->mgt.rq_tail]; 818 rx_skb->len = 0; 819 skb_put(rx_skb, cqe_misc & 0x0000ffff); 820 rx_skb->protocol = eth_type_trans(rx_skb, mgtvnic->nesvnic->netdev); 821 cb = (struct nes_rskb_cb *)&rx_skb->cb[0]; 822 pci_unmap_single(nesdev->pcidev, cb->busaddr, cb->maplen, PCI_DMA_FROMDEVICE); 823 cb->busaddr = 0; 824 mgtvnic->mgt.rq_tail++; 825 mgtvnic->mgt.rq_tail &= mgtvnic->mgt.rq_size - 1; 826 827 nes_add_ref_cm_node(nesqp->cm_node); 828 nes_queue_mgt_skbs(rx_skb, mgtvnic->nesvnic, nesqp); 829 } else { 830 printk(KERN_ERR PFX "Invalid QP %d for packed/unaligned handling\n", qp_id); 831 } 832 833 cq->cq_vbase[head].cqe_words[NES_NIC_CQE_MISC_IDX] = 0; 834 cqe_count++; 835 if (++head >= cq_size) 836 head = 0; 837 838 if (cqe_count == 255) { 839 /* Replenish mgt CQ */ 840 nes_write32(nesdev->regs + NES_CQE_ALLOC, cq->cq_number | (cqe_count << 16)); 841 nesdev->currcq_count += cqe_count; 842 cqe_count = 0; 843 } 844 845 skbs_needed = atomic_inc_return(&mgtvnic->rx_skbs_needed); 846 if (skbs_needed > (mgtvnic->mgt.rq_size >> 1)) 847 nes_replenish_mgt_rq(mgtvnic); 848 } 849 850 cq->cq_head = head; 851 nes_write32(nesdev->regs + NES_CQE_ALLOC, NES_CQE_ALLOC_NOTIFY_NEXT | 852 cq->cq_number | (cqe_count << 16)); 853 nes_read32(nesdev->regs + NES_CQE_ALLOC); 854 nesdev->currcq_count += cqe_count; 855} 856 857/** 858 * nes_init_mgt_qp 859 */ 860int nes_init_mgt_qp(struct nes_device *nesdev, struct net_device *netdev, struct nes_vnic *nesvnic) 861{ 862 struct nes_vnic_mgt *mgtvnic; 863 u32 counter; 864 void *vmem; 865 dma_addr_t pmem; 866 struct nes_hw_cqp_wqe *cqp_wqe; 867 u32 cqp_head; 868 unsigned long flags; 869 struct nes_hw_nic_qp_context *mgt_context; 870 u64 u64temp; 871 struct nes_hw_nic_rq_wqe *mgt_rqe; 872 struct sk_buff *skb; 873 u32 wqe_count; 874 struct nes_rskb_cb *cb; 875 u32 mgt_mem_size; 876 void *mgt_vbase; 877 dma_addr_t mgt_pbase; 878 int i; 879 int ret; 880 881 /* Allocate space the all mgt QPs once */ 882 mgtvnic = kzalloc(NES_MGT_QP_COUNT * sizeof(struct nes_vnic_mgt), GFP_KERNEL); 883 if (mgtvnic == NULL) { 884 nes_debug(NES_DBG_INIT, "Unable to allocate memory for mgt structure\n"); 885 return -ENOMEM; 886 } 887 888 /* Allocate fragment, RQ, and CQ; Reuse CEQ based on the PCI function */ 889 /* We are not sending from this NIC so sq is not allocated */ 890 mgt_mem_size = 256 + 891 (NES_MGT_WQ_COUNT * sizeof(struct nes_hw_nic_rq_wqe)) + 892 (NES_MGT_WQ_COUNT * sizeof(struct nes_hw_nic_cqe)) + 893 sizeof(struct nes_hw_nic_qp_context); 894 mgt_mem_size = (mgt_mem_size + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1); 895 mgt_vbase = pci_alloc_consistent(nesdev->pcidev, NES_MGT_QP_COUNT * mgt_mem_size, &mgt_pbase); 896 if (!mgt_vbase) { 897 kfree(mgtvnic); 898 nes_debug(NES_DBG_INIT, "Unable to allocate memory for mgt host descriptor rings\n"); 899 return -ENOMEM; 900 } 901 902 nesvnic->mgt_mem_size = NES_MGT_QP_COUNT * mgt_mem_size; 903 nesvnic->mgt_vbase = mgt_vbase; 904 nesvnic->mgt_pbase = mgt_pbase; 905 906 skb_queue_head_init(&nesvnic->mgt_skb_list); 907 init_waitqueue_head(&nesvnic->mgt_wait_queue); 908 nesvnic->mgt_thread = kthread_run(mgt_thread, nesvnic, "nes_mgt_thread"); 909 910 for (i = 0; i < NES_MGT_QP_COUNT; i++) { 911 mgtvnic->nesvnic = nesvnic; 912 mgtvnic->mgt.qp_id = nesdev->mac_index + NES_MGT_QP_OFFSET + i; 913 memset(mgt_vbase, 0, mgt_mem_size); 914 nes_debug(NES_DBG_INIT, "Allocated mgt QP structures at %p (phys = %016lX), size = %u.\n", 915 mgt_vbase, (unsigned long)mgt_pbase, mgt_mem_size); 916 917 vmem = (void *)(((unsigned long)mgt_vbase + (256 - 1)) & 918 ~(unsigned long)(256 - 1)); 919 pmem = (dma_addr_t)(((unsigned long long)mgt_pbase + (256 - 1)) & 920 ~(unsigned long long)(256 - 1)); 921 922 spin_lock_init(&mgtvnic->mgt.rq_lock); 923 924 /* setup the RQ */ 925 mgtvnic->mgt.rq_vbase = vmem; 926 mgtvnic->mgt.rq_pbase = pmem; 927 mgtvnic->mgt.rq_head = 0; 928 mgtvnic->mgt.rq_tail = 0; 929 mgtvnic->mgt.rq_size = NES_MGT_WQ_COUNT; 930 931 /* setup the CQ */ 932 vmem += (NES_MGT_WQ_COUNT * sizeof(struct nes_hw_nic_rq_wqe)); 933 pmem += (NES_MGT_WQ_COUNT * sizeof(struct nes_hw_nic_rq_wqe)); 934 935 mgtvnic->mgt_cq.cq_number = mgtvnic->mgt.qp_id; 936 mgtvnic->mgt_cq.cq_vbase = vmem; 937 mgtvnic->mgt_cq.cq_pbase = pmem; 938 mgtvnic->mgt_cq.cq_head = 0; 939 mgtvnic->mgt_cq.cq_size = NES_MGT_WQ_COUNT; 940 941 mgtvnic->mgt_cq.ce_handler = nes_mgt_ce_handler; 942 943 /* Send CreateCQ request to CQP */ 944 spin_lock_irqsave(&nesdev->cqp.lock, flags); 945 cqp_head = nesdev->cqp.sq_head; 946 947 cqp_wqe = &nesdev->cqp.sq_vbase[cqp_head]; 948 nes_fill_init_cqp_wqe(cqp_wqe, nesdev); 949 950 cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] = cpu_to_le32( 951 NES_CQP_CREATE_CQ | NES_CQP_CQ_CEQ_VALID | 952 ((u32)mgtvnic->mgt_cq.cq_size << 16)); 953 cqp_wqe->wqe_words[NES_CQP_WQE_ID_IDX] = cpu_to_le32( 954 mgtvnic->mgt_cq.cq_number | ((u32)nesdev->ceq_index << 16)); 955 u64temp = (u64)mgtvnic->mgt_cq.cq_pbase; 956 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_PBL_LOW_IDX, u64temp); 957 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] = 0; 958 u64temp = (unsigned long)&mgtvnic->mgt_cq; 959 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_LOW_IDX] = cpu_to_le32((u32)(u64temp >> 1)); 960 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] = 961 cpu_to_le32(((u32)((u64temp) >> 33)) & 0x7FFFFFFF); 962 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX] = 0; 963 964 if (++cqp_head >= nesdev->cqp.sq_size) 965 cqp_head = 0; 966 cqp_wqe = &nesdev->cqp.sq_vbase[cqp_head]; 967 nes_fill_init_cqp_wqe(cqp_wqe, nesdev); 968 969 /* Send CreateQP request to CQP */ 970 mgt_context = (void *)(&mgtvnic->mgt_cq.cq_vbase[mgtvnic->mgt_cq.cq_size]); 971 mgt_context->context_words[NES_NIC_CTX_MISC_IDX] = 972 cpu_to_le32((u32)NES_MGT_CTX_SIZE | 973 ((u32)PCI_FUNC(nesdev->pcidev->devfn) << 12)); 974 nes_debug(NES_DBG_INIT, "RX_WINDOW_BUFFER_PAGE_TABLE_SIZE = 0x%08X, RX_WINDOW_BUFFER_SIZE = 0x%08X\n", 975 nes_read_indexed(nesdev, NES_IDX_RX_WINDOW_BUFFER_PAGE_TABLE_SIZE), 976 nes_read_indexed(nesdev, NES_IDX_RX_WINDOW_BUFFER_SIZE)); 977 if (nes_read_indexed(nesdev, NES_IDX_RX_WINDOW_BUFFER_SIZE) != 0) 978 mgt_context->context_words[NES_NIC_CTX_MISC_IDX] |= cpu_to_le32(NES_NIC_BACK_STORE); 979 980 u64temp = (u64)mgtvnic->mgt.rq_pbase; 981 mgt_context->context_words[NES_NIC_CTX_SQ_LOW_IDX] = cpu_to_le32((u32)u64temp); 982 mgt_context->context_words[NES_NIC_CTX_SQ_HIGH_IDX] = cpu_to_le32((u32)(u64temp >> 32)); 983 u64temp = (u64)mgtvnic->mgt.rq_pbase; 984 mgt_context->context_words[NES_NIC_CTX_RQ_LOW_IDX] = cpu_to_le32((u32)u64temp); 985 mgt_context->context_words[NES_NIC_CTX_RQ_HIGH_IDX] = cpu_to_le32((u32)(u64temp >> 32)); 986 987 cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] = cpu_to_le32(NES_CQP_CREATE_QP | 988 NES_CQP_QP_TYPE_NIC); 989 cqp_wqe->wqe_words[NES_CQP_WQE_ID_IDX] = cpu_to_le32(mgtvnic->mgt.qp_id); 990 u64temp = (u64)mgtvnic->mgt_cq.cq_pbase + 991 (mgtvnic->mgt_cq.cq_size * sizeof(struct nes_hw_nic_cqe)); 992 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp); 993 994 if (++cqp_head >= nesdev->cqp.sq_size) 995 cqp_head = 0; 996 nesdev->cqp.sq_head = cqp_head; 997 998 barrier(); 999 1000 /* Ring doorbell (2 WQEs) */ 1001 nes_write32(nesdev->regs + NES_WQE_ALLOC, 0x02800000 | nesdev->cqp.qp_id); 1002 1003 spin_unlock_irqrestore(&nesdev->cqp.lock, flags); 1004 nes_debug(NES_DBG_INIT, "Waiting for create MGT QP%u to complete.\n", 1005 mgtvnic->mgt.qp_id); 1006 1007 ret = wait_event_timeout(nesdev->cqp.waitq, (nesdev->cqp.sq_tail == cqp_head), 1008 NES_EVENT_TIMEOUT); 1009 nes_debug(NES_DBG_INIT, "Create MGT QP%u completed, wait_event_timeout ret = %u.\n", 1010 mgtvnic->mgt.qp_id, ret); 1011 if (!ret) { 1012 nes_debug(NES_DBG_INIT, "MGT QP%u create timeout expired\n", mgtvnic->mgt.qp_id); 1013 if (i == 0) { 1014 pci_free_consistent(nesdev->pcidev, nesvnic->mgt_mem_size, nesvnic->mgt_vbase, 1015 nesvnic->mgt_pbase); 1016 kfree(mgtvnic); 1017 } else { 1018 nes_destroy_mgt(nesvnic); 1019 } 1020 return -EIO; 1021 } 1022 1023 /* Populate the RQ */ 1024 for (counter = 0; counter < (NES_MGT_WQ_COUNT - 1); counter++) { 1025 skb = dev_alloc_skb(nesvnic->max_frame_size); 1026 if (!skb) { 1027 nes_debug(NES_DBG_INIT, "%s: out of memory for receive skb\n", netdev->name); 1028 return -ENOMEM; 1029 } 1030 1031 skb->dev = netdev; 1032 1033 pmem = pci_map_single(nesdev->pcidev, skb->data, 1034 nesvnic->max_frame_size, PCI_DMA_FROMDEVICE); 1035 cb = (struct nes_rskb_cb *)&skb->cb[0]; 1036 cb->busaddr = pmem; 1037 cb->maplen = nesvnic->max_frame_size; 1038 1039 mgt_rqe = &mgtvnic->mgt.rq_vbase[counter]; 1040 mgt_rqe->wqe_words[NES_NIC_RQ_WQE_LENGTH_1_0_IDX] = cpu_to_le32((u32)nesvnic->max_frame_size); 1041 mgt_rqe->wqe_words[NES_NIC_RQ_WQE_LENGTH_3_2_IDX] = 0; 1042 mgt_rqe->wqe_words[NES_NIC_RQ_WQE_FRAG0_LOW_IDX] = cpu_to_le32((u32)pmem); 1043 mgt_rqe->wqe_words[NES_NIC_RQ_WQE_FRAG0_HIGH_IDX] = cpu_to_le32((u32)((u64)pmem >> 32)); 1044 mgtvnic->mgt.rx_skb[counter] = skb; 1045 } 1046 1047 init_timer(&mgtvnic->rq_wqes_timer); 1048 mgtvnic->rq_wqes_timer.function = nes_mgt_rq_wqes_timeout; 1049 mgtvnic->rq_wqes_timer.data = (unsigned long)mgtvnic; 1050 1051 wqe_count = NES_MGT_WQ_COUNT - 1; 1052 mgtvnic->mgt.rq_head = wqe_count; 1053 barrier(); 1054 do { 1055 counter = min(wqe_count, ((u32)255)); 1056 wqe_count -= counter; 1057 nes_write32(nesdev->regs + NES_WQE_ALLOC, (counter << 24) | mgtvnic->mgt.qp_id); 1058 } while (wqe_count); 1059 1060 nes_write32(nesdev->regs + NES_CQE_ALLOC, NES_CQE_ALLOC_NOTIFY_NEXT | 1061 mgtvnic->mgt_cq.cq_number); 1062 nes_read32(nesdev->regs + NES_CQE_ALLOC); 1063 1064 mgt_vbase += mgt_mem_size; 1065 mgt_pbase += mgt_mem_size; 1066 nesvnic->mgtvnic[i] = mgtvnic++; 1067 } 1068 return 0; 1069} 1070 1071 1072void nes_destroy_mgt(struct nes_vnic *nesvnic) 1073{ 1074 struct nes_device *nesdev = nesvnic->nesdev; 1075 struct nes_vnic_mgt *mgtvnic; 1076 struct nes_vnic_mgt *first_mgtvnic; 1077 unsigned long flags; 1078 struct nes_hw_cqp_wqe *cqp_wqe; 1079 u32 cqp_head; 1080 struct sk_buff *rx_skb; 1081 int i; 1082 int ret; 1083 1084 kthread_stop(nesvnic->mgt_thread); 1085 1086 /* Free remaining NIC receive buffers */ 1087 first_mgtvnic = nesvnic->mgtvnic[0]; 1088 for (i = 0; i < NES_MGT_QP_COUNT; i++) { 1089 mgtvnic = nesvnic->mgtvnic[i]; 1090 if (mgtvnic == NULL) 1091 continue; 1092 1093 while (mgtvnic->mgt.rq_head != mgtvnic->mgt.rq_tail) { 1094 rx_skb = mgtvnic->mgt.rx_skb[mgtvnic->mgt.rq_tail]; 1095 nes_mgt_free_skb(nesdev, rx_skb, PCI_DMA_FROMDEVICE); 1096 mgtvnic->mgt.rq_tail++; 1097 mgtvnic->mgt.rq_tail &= (mgtvnic->mgt.rq_size - 1); 1098 } 1099 1100 spin_lock_irqsave(&nesdev->cqp.lock, flags); 1101 1102 /* Destroy NIC QP */ 1103 cqp_head = nesdev->cqp.sq_head; 1104 cqp_wqe = &nesdev->cqp.sq_vbase[cqp_head]; 1105 nes_fill_init_cqp_wqe(cqp_wqe, nesdev); 1106 1107 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, 1108 (NES_CQP_DESTROY_QP | NES_CQP_QP_TYPE_NIC)); 1109 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, 1110 mgtvnic->mgt.qp_id); 1111 1112 if (++cqp_head >= nesdev->cqp.sq_size) 1113 cqp_head = 0; 1114 1115 cqp_wqe = &nesdev->cqp.sq_vbase[cqp_head]; 1116 1117 /* Destroy NIC CQ */ 1118 nes_fill_init_cqp_wqe(cqp_wqe, nesdev); 1119 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, 1120 (NES_CQP_DESTROY_CQ | ((u32)mgtvnic->mgt_cq.cq_size << 16))); 1121 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, 1122 (mgtvnic->mgt_cq.cq_number | ((u32)nesdev->ceq_index << 16))); 1123 1124 if (++cqp_head >= nesdev->cqp.sq_size) 1125 cqp_head = 0; 1126 1127 nesdev->cqp.sq_head = cqp_head; 1128 barrier(); 1129 1130 /* Ring doorbell (2 WQEs) */ 1131 nes_write32(nesdev->regs + NES_WQE_ALLOC, 0x02800000 | nesdev->cqp.qp_id); 1132 1133 spin_unlock_irqrestore(&nesdev->cqp.lock, flags); 1134 nes_debug(NES_DBG_SHUTDOWN, "Waiting for CQP, cqp_head=%u, cqp.sq_head=%u," 1135 " cqp.sq_tail=%u, cqp.sq_size=%u\n", 1136 cqp_head, nesdev->cqp.sq_head, 1137 nesdev->cqp.sq_tail, nesdev->cqp.sq_size); 1138 1139 ret = wait_event_timeout(nesdev->cqp.waitq, (nesdev->cqp.sq_tail == cqp_head), 1140 NES_EVENT_TIMEOUT); 1141 1142 nes_debug(NES_DBG_SHUTDOWN, "Destroy MGT QP returned, wait_event_timeout ret = %u, cqp_head=%u," 1143 " cqp.sq_head=%u, cqp.sq_tail=%u\n", 1144 ret, cqp_head, nesdev->cqp.sq_head, nesdev->cqp.sq_tail); 1145 if (!ret) 1146 nes_debug(NES_DBG_SHUTDOWN, "MGT QP%u destroy timeout expired\n", 1147 mgtvnic->mgt.qp_id); 1148 1149 nesvnic->mgtvnic[i] = NULL; 1150 } 1151 1152 if (nesvnic->mgt_vbase) { 1153 pci_free_consistent(nesdev->pcidev, nesvnic->mgt_mem_size, nesvnic->mgt_vbase, 1154 nesvnic->mgt_pbase); 1155 nesvnic->mgt_vbase = NULL; 1156 nesvnic->mgt_pbase = 0; 1157 } 1158 1159 kfree(first_mgtvnic); 1160} 1161