1 /* 2 * Copyright (c) 2009-2010 Chelsio, 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 #include "iw_cxgb4.h" 34 35 static int destroy_cq(struct c4iw_rdev *rdev, struct t4_cq *cq, 36 struct c4iw_dev_ucontext *uctx) 37 { 38 struct fw_ri_res_wr *res_wr; 39 struct fw_ri_res *res; 40 int wr_len; 41 struct c4iw_wr_wait wr_wait; 42 struct sk_buff *skb; 43 int ret; 44 45 wr_len = sizeof *res_wr + sizeof *res; 46 skb = alloc_skb(wr_len, GFP_KERNEL); 47 if (!skb) 48 return -ENOMEM; 49 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0); 50 51 res_wr = (struct fw_ri_res_wr *)__skb_put(skb, wr_len); 52 memset(res_wr, 0, wr_len); 53 res_wr->op_nres = cpu_to_be32( 54 FW_WR_OP(FW_RI_RES_WR) | 55 V_FW_RI_RES_WR_NRES(1) | 56 FW_WR_COMPL(1)); 57 res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16)); 58 res_wr->cookie = (unsigned long) &wr_wait; 59 res = res_wr->res; 60 res->u.cq.restype = FW_RI_RES_TYPE_CQ; 61 res->u.cq.op = FW_RI_RES_OP_RESET; 62 res->u.cq.iqid = cpu_to_be32(cq->cqid); 63 64 c4iw_init_wr_wait(&wr_wait); 65 ret = c4iw_ofld_send(rdev, skb); 66 if (!ret) { 67 ret = c4iw_wait_for_reply(rdev, &wr_wait, 0, 0, __func__); 68 } 69 70 kfree(cq->sw_queue); 71 dma_free_coherent(&(rdev->lldi.pdev->dev), 72 cq->memsize, cq->queue, 73 dma_unmap_addr(cq, mapping)); 74 c4iw_put_cqid(rdev, cq->cqid, uctx); 75 return ret; 76 } 77 78 static int create_cq(struct c4iw_rdev *rdev, struct t4_cq *cq, 79 struct c4iw_dev_ucontext *uctx) 80 { 81 struct fw_ri_res_wr *res_wr; 82 struct fw_ri_res *res; 83 int wr_len; 84 int user = (uctx != &rdev->uctx); 85 struct c4iw_wr_wait wr_wait; 86 int ret; 87 struct sk_buff *skb; 88 89 cq->cqid = c4iw_get_cqid(rdev, uctx); 90 if (!cq->cqid) { 91 ret = -ENOMEM; 92 goto err1; 93 } 94 95 if (!user) { 96 cq->sw_queue = kzalloc(cq->memsize, GFP_KERNEL); 97 if (!cq->sw_queue) { 98 ret = -ENOMEM; 99 goto err2; 100 } 101 } 102 cq->queue = dma_alloc_coherent(&rdev->lldi.pdev->dev, cq->memsize, 103 &cq->dma_addr, GFP_KERNEL); 104 if (!cq->queue) { 105 ret = -ENOMEM; 106 goto err3; 107 } 108 dma_unmap_addr_set(cq, mapping, cq->dma_addr); 109 memset(cq->queue, 0, cq->memsize); 110 111 /* build fw_ri_res_wr */ 112 wr_len = sizeof *res_wr + sizeof *res; 113 114 skb = alloc_skb(wr_len, GFP_KERNEL); 115 if (!skb) { 116 ret = -ENOMEM; 117 goto err4; 118 } 119 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0); 120 121 res_wr = (struct fw_ri_res_wr *)__skb_put(skb, wr_len); 122 memset(res_wr, 0, wr_len); 123 res_wr->op_nres = cpu_to_be32( 124 FW_WR_OP(FW_RI_RES_WR) | 125 V_FW_RI_RES_WR_NRES(1) | 126 FW_WR_COMPL(1)); 127 res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16)); 128 res_wr->cookie = (unsigned long) &wr_wait; 129 res = res_wr->res; 130 res->u.cq.restype = FW_RI_RES_TYPE_CQ; 131 res->u.cq.op = FW_RI_RES_OP_WRITE; 132 res->u.cq.iqid = cpu_to_be32(cq->cqid); 133 res->u.cq.iqandst_to_iqandstindex = cpu_to_be32( 134 V_FW_RI_RES_WR_IQANUS(0) | 135 V_FW_RI_RES_WR_IQANUD(1) | 136 F_FW_RI_RES_WR_IQANDST | 137 V_FW_RI_RES_WR_IQANDSTINDEX(*rdev->lldi.rxq_ids)); 138 res->u.cq.iqdroprss_to_iqesize = cpu_to_be16( 139 F_FW_RI_RES_WR_IQDROPRSS | 140 V_FW_RI_RES_WR_IQPCIECH(2) | 141 V_FW_RI_RES_WR_IQINTCNTTHRESH(0) | 142 F_FW_RI_RES_WR_IQO | 143 V_FW_RI_RES_WR_IQESIZE(1)); 144 res->u.cq.iqsize = cpu_to_be16(cq->size); 145 res->u.cq.iqaddr = cpu_to_be64(cq->dma_addr); 146 147 c4iw_init_wr_wait(&wr_wait); 148 149 ret = c4iw_ofld_send(rdev, skb); 150 if (ret) 151 goto err4; 152 PDBG("%s wait_event wr_wait %p\n", __func__, &wr_wait); 153 ret = c4iw_wait_for_reply(rdev, &wr_wait, 0, 0, __func__); 154 if (ret) 155 goto err4; 156 157 cq->gen = 1; 158 cq->gts = rdev->lldi.gts_reg; 159 cq->rdev = rdev; 160 if (user) { 161 cq->ugts = (u64)pci_resource_start(rdev->lldi.pdev, 2) + 162 (cq->cqid << rdev->cqshift); 163 cq->ugts &= PAGE_MASK; 164 } 165 return 0; 166 err4: 167 dma_free_coherent(&rdev->lldi.pdev->dev, cq->memsize, cq->queue, 168 dma_unmap_addr(cq, mapping)); 169 err3: 170 kfree(cq->sw_queue); 171 err2: 172 c4iw_put_cqid(rdev, cq->cqid, uctx); 173 err1: 174 return ret; 175 } 176 177 static void insert_recv_cqe(struct t4_wq *wq, struct t4_cq *cq) 178 { 179 struct t4_cqe cqe; 180 181 PDBG("%s wq %p cq %p sw_cidx %u sw_pidx %u\n", __func__, 182 wq, cq, cq->sw_cidx, cq->sw_pidx); 183 memset(&cqe, 0, sizeof(cqe)); 184 cqe.header = cpu_to_be32(V_CQE_STATUS(T4_ERR_SWFLUSH) | 185 V_CQE_OPCODE(FW_RI_SEND) | 186 V_CQE_TYPE(0) | 187 V_CQE_SWCQE(1) | 188 V_CQE_QPID(wq->sq.qid)); 189 cqe.bits_type_ts = cpu_to_be64(V_CQE_GENBIT((u64)cq->gen)); 190 cq->sw_queue[cq->sw_pidx] = cqe; 191 t4_swcq_produce(cq); 192 } 193 194 int c4iw_flush_rq(struct t4_wq *wq, struct t4_cq *cq, int count) 195 { 196 int flushed = 0; 197 int in_use = wq->rq.in_use - count; 198 199 BUG_ON(in_use < 0); 200 PDBG("%s wq %p cq %p rq.in_use %u skip count %u\n", __func__, 201 wq, cq, wq->rq.in_use, count); 202 while (in_use--) { 203 insert_recv_cqe(wq, cq); 204 flushed++; 205 } 206 return flushed; 207 } 208 209 static void insert_sq_cqe(struct t4_wq *wq, struct t4_cq *cq, 210 struct t4_swsqe *swcqe) 211 { 212 struct t4_cqe cqe; 213 214 PDBG("%s wq %p cq %p sw_cidx %u sw_pidx %u\n", __func__, 215 wq, cq, cq->sw_cidx, cq->sw_pidx); 216 memset(&cqe, 0, sizeof(cqe)); 217 cqe.header = cpu_to_be32(V_CQE_STATUS(T4_ERR_SWFLUSH) | 218 V_CQE_OPCODE(swcqe->opcode) | 219 V_CQE_TYPE(1) | 220 V_CQE_SWCQE(1) | 221 V_CQE_QPID(wq->sq.qid)); 222 CQE_WRID_SQ_IDX(&cqe) = swcqe->idx; 223 cqe.bits_type_ts = cpu_to_be64(V_CQE_GENBIT((u64)cq->gen)); 224 cq->sw_queue[cq->sw_pidx] = cqe; 225 t4_swcq_produce(cq); 226 } 227 228 int c4iw_flush_sq(struct t4_wq *wq, struct t4_cq *cq, int count) 229 { 230 int flushed = 0; 231 struct t4_swsqe *swsqe = &wq->sq.sw_sq[wq->sq.cidx + count]; 232 int in_use = wq->sq.in_use - count; 233 234 BUG_ON(in_use < 0); 235 while (in_use--) { 236 swsqe->signaled = 0; 237 insert_sq_cqe(wq, cq, swsqe); 238 swsqe++; 239 if (swsqe == (wq->sq.sw_sq + wq->sq.size)) 240 swsqe = wq->sq.sw_sq; 241 flushed++; 242 } 243 return flushed; 244 } 245 246 /* 247 * Move all CQEs from the HWCQ into the SWCQ. 248 */ 249 void c4iw_flush_hw_cq(struct t4_cq *cq) 250 { 251 struct t4_cqe *cqe = NULL, *swcqe; 252 int ret; 253 254 PDBG("%s cq %p cqid 0x%x\n", __func__, cq, cq->cqid); 255 ret = t4_next_hw_cqe(cq, &cqe); 256 while (!ret) { 257 PDBG("%s flushing hwcq cidx 0x%x swcq pidx 0x%x\n", 258 __func__, cq->cidx, cq->sw_pidx); 259 swcqe = &cq->sw_queue[cq->sw_pidx]; 260 *swcqe = *cqe; 261 swcqe->header |= cpu_to_be32(V_CQE_SWCQE(1)); 262 t4_swcq_produce(cq); 263 t4_hwcq_consume(cq); 264 ret = t4_next_hw_cqe(cq, &cqe); 265 } 266 } 267 268 static int cqe_completes_wr(struct t4_cqe *cqe, struct t4_wq *wq) 269 { 270 if (CQE_OPCODE(cqe) == FW_RI_TERMINATE) 271 return 0; 272 273 if ((CQE_OPCODE(cqe) == FW_RI_RDMA_WRITE) && RQ_TYPE(cqe)) 274 return 0; 275 276 if ((CQE_OPCODE(cqe) == FW_RI_READ_RESP) && SQ_TYPE(cqe)) 277 return 0; 278 279 if (CQE_SEND_OPCODE(cqe) && RQ_TYPE(cqe) && t4_rq_empty(wq)) 280 return 0; 281 return 1; 282 } 283 284 void c4iw_count_scqes(struct t4_cq *cq, struct t4_wq *wq, int *count) 285 { 286 struct t4_cqe *cqe; 287 u32 ptr; 288 289 *count = 0; 290 ptr = cq->sw_cidx; 291 while (ptr != cq->sw_pidx) { 292 cqe = &cq->sw_queue[ptr]; 293 if ((SQ_TYPE(cqe) || ((CQE_OPCODE(cqe) == FW_RI_READ_RESP) && 294 wq->sq.oldest_read)) && 295 (CQE_QPID(cqe) == wq->sq.qid)) 296 (*count)++; 297 if (++ptr == cq->size) 298 ptr = 0; 299 } 300 PDBG("%s cq %p count %d\n", __func__, cq, *count); 301 } 302 303 void c4iw_count_rcqes(struct t4_cq *cq, struct t4_wq *wq, int *count) 304 { 305 struct t4_cqe *cqe; 306 u32 ptr; 307 308 *count = 0; 309 PDBG("%s count zero %d\n", __func__, *count); 310 ptr = cq->sw_cidx; 311 while (ptr != cq->sw_pidx) { 312 cqe = &cq->sw_queue[ptr]; 313 if (RQ_TYPE(cqe) && (CQE_OPCODE(cqe) != FW_RI_READ_RESP) && 314 (CQE_QPID(cqe) == wq->sq.qid) && cqe_completes_wr(cqe, wq)) 315 (*count)++; 316 if (++ptr == cq->size) 317 ptr = 0; 318 } 319 PDBG("%s cq %p count %d\n", __func__, cq, *count); 320 } 321 322 static void flush_completed_wrs(struct t4_wq *wq, struct t4_cq *cq) 323 { 324 struct t4_swsqe *swsqe; 325 u16 ptr = wq->sq.cidx; 326 int count = wq->sq.in_use; 327 int unsignaled = 0; 328 329 swsqe = &wq->sq.sw_sq[ptr]; 330 while (count--) 331 if (!swsqe->signaled) { 332 if (++ptr == wq->sq.size) 333 ptr = 0; 334 swsqe = &wq->sq.sw_sq[ptr]; 335 unsignaled++; 336 } else if (swsqe->complete) { 337 338 /* 339 * Insert this completed cqe into the swcq. 340 */ 341 PDBG("%s moving cqe into swcq sq idx %u cq idx %u\n", 342 __func__, ptr, cq->sw_pidx); 343 swsqe->cqe.header |= htonl(V_CQE_SWCQE(1)); 344 cq->sw_queue[cq->sw_pidx] = swsqe->cqe; 345 t4_swcq_produce(cq); 346 swsqe->signaled = 0; 347 wq->sq.in_use -= unsignaled; 348 break; 349 } else 350 break; 351 } 352 353 static void create_read_req_cqe(struct t4_wq *wq, struct t4_cqe *hw_cqe, 354 struct t4_cqe *read_cqe) 355 { 356 read_cqe->u.scqe.cidx = wq->sq.oldest_read->idx; 357 read_cqe->len = cpu_to_be32(wq->sq.oldest_read->read_len); 358 read_cqe->header = htonl(V_CQE_QPID(CQE_QPID(hw_cqe)) | 359 V_CQE_SWCQE(SW_CQE(hw_cqe)) | 360 V_CQE_OPCODE(FW_RI_READ_REQ) | 361 V_CQE_TYPE(1)); 362 read_cqe->bits_type_ts = hw_cqe->bits_type_ts; 363 } 364 365 /* 366 * Return a ptr to the next read wr in the SWSQ or NULL. 367 */ 368 static void advance_oldest_read(struct t4_wq *wq) 369 { 370 371 u32 rptr = wq->sq.oldest_read - wq->sq.sw_sq + 1; 372 373 if (rptr == wq->sq.size) 374 rptr = 0; 375 while (rptr != wq->sq.pidx) { 376 wq->sq.oldest_read = &wq->sq.sw_sq[rptr]; 377 378 if (wq->sq.oldest_read->opcode == FW_RI_READ_REQ) 379 return; 380 if (++rptr == wq->sq.size) 381 rptr = 0; 382 } 383 wq->sq.oldest_read = NULL; 384 } 385 386 /* 387 * poll_cq 388 * 389 * Caller must: 390 * check the validity of the first CQE, 391 * supply the wq assicated with the qpid. 392 * 393 * credit: cq credit to return to sge. 394 * cqe_flushed: 1 iff the CQE is flushed. 395 * cqe: copy of the polled CQE. 396 * 397 * return value: 398 * 0 CQE returned ok. 399 * -EAGAIN CQE skipped, try again. 400 * -EOVERFLOW CQ overflow detected. 401 */ 402 static int poll_cq(struct t4_wq *wq, struct t4_cq *cq, struct t4_cqe *cqe, 403 u8 *cqe_flushed, u64 *cookie, u32 *credit) 404 { 405 int ret = 0; 406 struct t4_cqe *hw_cqe, read_cqe; 407 408 *cqe_flushed = 0; 409 *credit = 0; 410 ret = t4_next_cqe(cq, &hw_cqe); 411 if (ret) 412 return ret; 413 414 PDBG("%s CQE OVF %u qpid 0x%0x genbit %u type %u status 0x%0x" 415 " opcode 0x%0x len 0x%0x wrid_hi_stag 0x%x wrid_low_msn 0x%x\n", 416 __func__, CQE_OVFBIT(hw_cqe), CQE_QPID(hw_cqe), 417 CQE_GENBIT(hw_cqe), CQE_TYPE(hw_cqe), CQE_STATUS(hw_cqe), 418 CQE_OPCODE(hw_cqe), CQE_LEN(hw_cqe), CQE_WRID_HI(hw_cqe), 419 CQE_WRID_LOW(hw_cqe)); 420 421 /* 422 * skip cqe's not affiliated with a QP. 423 */ 424 if (wq == NULL) { 425 ret = -EAGAIN; 426 goto skip_cqe; 427 } 428 429 /* 430 * Gotta tweak READ completions: 431 * 1) the cqe doesn't contain the sq_wptr from the wr. 432 * 2) opcode not reflected from the wr. 433 * 3) read_len not reflected from the wr. 434 * 4) cq_type is RQ_TYPE not SQ_TYPE. 435 */ 436 if (RQ_TYPE(hw_cqe) && (CQE_OPCODE(hw_cqe) == FW_RI_READ_RESP)) { 437 438 /* 439 * If this is an unsolicited read response, then the read 440 * was generated by the kernel driver as part of peer-2-peer 441 * connection setup. So ignore the completion. 442 */ 443 if (!wq->sq.oldest_read) { 444 if (CQE_STATUS(hw_cqe)) 445 t4_set_wq_in_error(wq); 446 ret = -EAGAIN; 447 goto skip_cqe; 448 } 449 450 /* 451 * Don't write to the HWCQ, so create a new read req CQE 452 * in local memory. 453 */ 454 create_read_req_cqe(wq, hw_cqe, &read_cqe); 455 hw_cqe = &read_cqe; 456 advance_oldest_read(wq); 457 } 458 459 if (CQE_STATUS(hw_cqe) || t4_wq_in_error(wq)) { 460 *cqe_flushed = t4_wq_in_error(wq); 461 t4_set_wq_in_error(wq); 462 goto proc_cqe; 463 } 464 465 if (CQE_OPCODE(hw_cqe) == FW_RI_TERMINATE) { 466 ret = -EAGAIN; 467 goto skip_cqe; 468 } 469 470 /* 471 * RECV completion. 472 */ 473 if (RQ_TYPE(hw_cqe)) { 474 475 /* 476 * HW only validates 4 bits of MSN. So we must validate that 477 * the MSN in the SEND is the next expected MSN. If its not, 478 * then we complete this with T4_ERR_MSN and mark the wq in 479 * error. 480 */ 481 482 if (t4_rq_empty(wq)) { 483 t4_set_wq_in_error(wq); 484 ret = -EAGAIN; 485 goto skip_cqe; 486 } 487 if (unlikely((CQE_WRID_MSN(hw_cqe) != (wq->rq.msn)))) { 488 t4_set_wq_in_error(wq); 489 hw_cqe->header |= htonl(V_CQE_STATUS(T4_ERR_MSN)); 490 goto proc_cqe; 491 } 492 goto proc_cqe; 493 } 494 495 /* 496 * If we get here its a send completion. 497 * 498 * Handle out of order completion. These get stuffed 499 * in the SW SQ. Then the SW SQ is walked to move any 500 * now in-order completions into the SW CQ. This handles 501 * 2 cases: 502 * 1) reaping unsignaled WRs when the first subsequent 503 * signaled WR is completed. 504 * 2) out of order read completions. 505 */ 506 if (!SW_CQE(hw_cqe) && (CQE_WRID_SQ_IDX(hw_cqe) != wq->sq.cidx)) { 507 struct t4_swsqe *swsqe; 508 509 PDBG("%s out of order completion going in sw_sq at idx %u\n", 510 __func__, CQE_WRID_SQ_IDX(hw_cqe)); 511 swsqe = &wq->sq.sw_sq[CQE_WRID_SQ_IDX(hw_cqe)]; 512 swsqe->cqe = *hw_cqe; 513 swsqe->complete = 1; 514 ret = -EAGAIN; 515 goto flush_wq; 516 } 517 518 proc_cqe: 519 *cqe = *hw_cqe; 520 521 /* 522 * Reap the associated WR(s) that are freed up with this 523 * completion. 524 */ 525 if (SQ_TYPE(hw_cqe)) { 526 wq->sq.cidx = CQE_WRID_SQ_IDX(hw_cqe); 527 PDBG("%s completing sq idx %u\n", __func__, wq->sq.cidx); 528 *cookie = wq->sq.sw_sq[wq->sq.cidx].wr_id; 529 t4_sq_consume(wq); 530 } else { 531 PDBG("%s completing rq idx %u\n", __func__, wq->rq.cidx); 532 *cookie = wq->rq.sw_rq[wq->rq.cidx].wr_id; 533 BUG_ON(t4_rq_empty(wq)); 534 t4_rq_consume(wq); 535 } 536 537 flush_wq: 538 /* 539 * Flush any completed cqes that are now in-order. 540 */ 541 flush_completed_wrs(wq, cq); 542 543 skip_cqe: 544 if (SW_CQE(hw_cqe)) { 545 PDBG("%s cq %p cqid 0x%x skip sw cqe cidx %u\n", 546 __func__, cq, cq->cqid, cq->sw_cidx); 547 t4_swcq_consume(cq); 548 } else { 549 PDBG("%s cq %p cqid 0x%x skip hw cqe cidx %u\n", 550 __func__, cq, cq->cqid, cq->cidx); 551 t4_hwcq_consume(cq); 552 } 553 return ret; 554 } 555 556 /* 557 * Get one cq entry from c4iw and map it to openib. 558 * 559 * Returns: 560 * 0 cqe returned 561 * -ENODATA EMPTY; 562 * -EAGAIN caller must try again 563 * any other -errno fatal error 564 */ 565 static int c4iw_poll_cq_one(struct c4iw_cq *chp, struct ib_wc *wc) 566 { 567 struct c4iw_qp *qhp = NULL; 568 struct t4_cqe cqe = {0, 0}, *rd_cqe; 569 struct t4_wq *wq; 570 u32 credit = 0; 571 u8 cqe_flushed; 572 u64 cookie = 0; 573 int ret; 574 575 ret = t4_next_cqe(&chp->cq, &rd_cqe); 576 577 if (ret) 578 return ret; 579 580 qhp = get_qhp(chp->rhp, CQE_QPID(rd_cqe)); 581 if (!qhp) 582 wq = NULL; 583 else { 584 spin_lock(&qhp->lock); 585 wq = &(qhp->wq); 586 } 587 ret = poll_cq(wq, &(chp->cq), &cqe, &cqe_flushed, &cookie, &credit); 588 if (ret) 589 goto out; 590 591 wc->wr_id = cookie; 592 wc->qp = &qhp->ibqp; 593 wc->vendor_err = CQE_STATUS(&cqe); 594 wc->wc_flags = 0; 595 596 PDBG("%s qpid 0x%x type %d opcode %d status 0x%x len %u wrid hi 0x%x " 597 "lo 0x%x cookie 0x%llx\n", __func__, CQE_QPID(&cqe), 598 CQE_TYPE(&cqe), CQE_OPCODE(&cqe), CQE_STATUS(&cqe), CQE_LEN(&cqe), 599 CQE_WRID_HI(&cqe), CQE_WRID_LOW(&cqe), (unsigned long long)cookie); 600 601 if (CQE_TYPE(&cqe) == 0) { 602 if (!CQE_STATUS(&cqe)) 603 wc->byte_len = CQE_LEN(&cqe); 604 else 605 wc->byte_len = 0; 606 wc->opcode = IB_WC_RECV; 607 if (CQE_OPCODE(&cqe) == FW_RI_SEND_WITH_INV || 608 CQE_OPCODE(&cqe) == FW_RI_SEND_WITH_SE_INV) { 609 wc->ex.invalidate_rkey = CQE_WRID_STAG(&cqe); 610 wc->wc_flags |= IB_WC_WITH_INVALIDATE; 611 } 612 } else { 613 switch (CQE_OPCODE(&cqe)) { 614 case FW_RI_RDMA_WRITE: 615 wc->opcode = IB_WC_RDMA_WRITE; 616 break; 617 case FW_RI_READ_REQ: 618 wc->opcode = IB_WC_RDMA_READ; 619 wc->byte_len = CQE_LEN(&cqe); 620 break; 621 case FW_RI_SEND_WITH_INV: 622 case FW_RI_SEND_WITH_SE_INV: 623 wc->opcode = IB_WC_SEND; 624 wc->wc_flags |= IB_WC_WITH_INVALIDATE; 625 break; 626 case FW_RI_SEND: 627 case FW_RI_SEND_WITH_SE: 628 wc->opcode = IB_WC_SEND; 629 break; 630 case FW_RI_BIND_MW: 631 wc->opcode = IB_WC_BIND_MW; 632 break; 633 634 case FW_RI_LOCAL_INV: 635 wc->opcode = IB_WC_LOCAL_INV; 636 break; 637 case FW_RI_FAST_REGISTER: 638 wc->opcode = IB_WC_FAST_REG_MR; 639 break; 640 default: 641 printk(KERN_ERR MOD "Unexpected opcode %d " 642 "in the CQE received for QPID=0x%0x\n", 643 CQE_OPCODE(&cqe), CQE_QPID(&cqe)); 644 ret = -EINVAL; 645 goto out; 646 } 647 } 648 649 if (cqe_flushed) 650 wc->status = IB_WC_WR_FLUSH_ERR; 651 else { 652 653 switch (CQE_STATUS(&cqe)) { 654 case T4_ERR_SUCCESS: 655 wc->status = IB_WC_SUCCESS; 656 break; 657 case T4_ERR_STAG: 658 wc->status = IB_WC_LOC_ACCESS_ERR; 659 break; 660 case T4_ERR_PDID: 661 wc->status = IB_WC_LOC_PROT_ERR; 662 break; 663 case T4_ERR_QPID: 664 case T4_ERR_ACCESS: 665 wc->status = IB_WC_LOC_ACCESS_ERR; 666 break; 667 case T4_ERR_WRAP: 668 wc->status = IB_WC_GENERAL_ERR; 669 break; 670 case T4_ERR_BOUND: 671 wc->status = IB_WC_LOC_LEN_ERR; 672 break; 673 case T4_ERR_INVALIDATE_SHARED_MR: 674 case T4_ERR_INVALIDATE_MR_WITH_MW_BOUND: 675 wc->status = IB_WC_MW_BIND_ERR; 676 break; 677 case T4_ERR_CRC: 678 case T4_ERR_MARKER: 679 case T4_ERR_PDU_LEN_ERR: 680 case T4_ERR_OUT_OF_RQE: 681 case T4_ERR_DDP_VERSION: 682 case T4_ERR_RDMA_VERSION: 683 case T4_ERR_DDP_QUEUE_NUM: 684 case T4_ERR_MSN: 685 case T4_ERR_TBIT: 686 case T4_ERR_MO: 687 case T4_ERR_MSN_RANGE: 688 case T4_ERR_IRD_OVERFLOW: 689 case T4_ERR_OPCODE: 690 case T4_ERR_INTERNAL_ERR: 691 wc->status = IB_WC_FATAL_ERR; 692 break; 693 case T4_ERR_SWFLUSH: 694 wc->status = IB_WC_WR_FLUSH_ERR; 695 break; 696 default: 697 printk(KERN_ERR MOD 698 "Unexpected cqe_status 0x%x for QPID=0x%0x\n", 699 CQE_STATUS(&cqe), CQE_QPID(&cqe)); 700 ret = -EINVAL; 701 } 702 } 703 out: 704 if (wq) 705 spin_unlock(&qhp->lock); 706 return ret; 707 } 708 709 int c4iw_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc) 710 { 711 struct c4iw_cq *chp; 712 unsigned long flags; 713 int npolled; 714 int err = 0; 715 716 chp = to_c4iw_cq(ibcq); 717 718 spin_lock_irqsave(&chp->lock, flags); 719 for (npolled = 0; npolled < num_entries; ++npolled) { 720 do { 721 err = c4iw_poll_cq_one(chp, wc + npolled); 722 } while (err == -EAGAIN); 723 if (err) 724 break; 725 } 726 spin_unlock_irqrestore(&chp->lock, flags); 727 return !err || err == -ENODATA ? npolled : err; 728 } 729 730 int c4iw_destroy_cq(struct ib_cq *ib_cq) 731 { 732 struct c4iw_cq *chp; 733 struct c4iw_ucontext *ucontext; 734 735 PDBG("%s ib_cq %p\n", __func__, ib_cq); 736 chp = to_c4iw_cq(ib_cq); 737 738 remove_handle(chp->rhp, &chp->rhp->cqidr, chp->cq.cqid); 739 atomic_dec(&chp->refcnt); 740 wait_event(chp->wait, !atomic_read(&chp->refcnt)); 741 742 ucontext = ib_cq->uobject ? to_c4iw_ucontext(ib_cq->uobject->context) 743 : NULL; 744 destroy_cq(&chp->rhp->rdev, &chp->cq, 745 ucontext ? &ucontext->uctx : &chp->cq.rdev->uctx); 746 kfree(chp); 747 return 0; 748 } 749 750 struct ib_cq *c4iw_create_cq(struct ib_device *ibdev, int entries, 751 int vector, struct ib_ucontext *ib_context, 752 struct ib_udata *udata) 753 { 754 struct c4iw_dev *rhp; 755 struct c4iw_cq *chp; 756 struct c4iw_create_cq_resp uresp; 757 struct c4iw_ucontext *ucontext = NULL; 758 int ret; 759 size_t memsize, hwentries; 760 struct c4iw_mm_entry *mm, *mm2; 761 762 PDBG("%s ib_dev %p entries %d\n", __func__, ibdev, entries); 763 764 rhp = to_c4iw_dev(ibdev); 765 766 chp = kzalloc(sizeof(*chp), GFP_KERNEL); 767 if (!chp) 768 return ERR_PTR(-ENOMEM); 769 770 if (ib_context) 771 ucontext = to_c4iw_ucontext(ib_context); 772 773 /* account for the status page. */ 774 entries++; 775 776 /* IQ needs one extra entry to differentiate full vs empty. */ 777 entries++; 778 779 /* 780 * entries must be multiple of 16 for HW. 781 */ 782 entries = roundup(entries, 16); 783 784 /* 785 * Make actual HW queue 2x to avoid cdix_inc overflows. 786 */ 787 hwentries = entries * 2; 788 789 /* 790 * Make HW queue at least 64 entries so GTS updates aren't too 791 * frequent. 792 */ 793 if (hwentries < 64) 794 hwentries = 64; 795 796 memsize = hwentries * sizeof *chp->cq.queue; 797 798 /* 799 * memsize must be a multiple of the page size if its a user cq. 800 */ 801 if (ucontext) { 802 memsize = roundup(memsize, PAGE_SIZE); 803 hwentries = memsize / sizeof *chp->cq.queue; 804 while (hwentries > T4_MAX_IQ_SIZE) { 805 memsize -= PAGE_SIZE; 806 hwentries = memsize / sizeof *chp->cq.queue; 807 } 808 } 809 chp->cq.size = hwentries; 810 chp->cq.memsize = memsize; 811 812 ret = create_cq(&rhp->rdev, &chp->cq, 813 ucontext ? &ucontext->uctx : &rhp->rdev.uctx); 814 if (ret) 815 goto err1; 816 817 chp->rhp = rhp; 818 chp->cq.size--; /* status page */ 819 chp->ibcq.cqe = entries - 2; 820 spin_lock_init(&chp->lock); 821 spin_lock_init(&chp->comp_handler_lock); 822 atomic_set(&chp->refcnt, 1); 823 init_waitqueue_head(&chp->wait); 824 ret = insert_handle(rhp, &rhp->cqidr, chp, chp->cq.cqid); 825 if (ret) 826 goto err2; 827 828 if (ucontext) { 829 mm = kmalloc(sizeof *mm, GFP_KERNEL); 830 if (!mm) 831 goto err3; 832 mm2 = kmalloc(sizeof *mm2, GFP_KERNEL); 833 if (!mm2) 834 goto err4; 835 836 uresp.qid_mask = rhp->rdev.cqmask; 837 uresp.cqid = chp->cq.cqid; 838 uresp.size = chp->cq.size; 839 uresp.memsize = chp->cq.memsize; 840 spin_lock(&ucontext->mmap_lock); 841 uresp.key = ucontext->key; 842 ucontext->key += PAGE_SIZE; 843 uresp.gts_key = ucontext->key; 844 ucontext->key += PAGE_SIZE; 845 spin_unlock(&ucontext->mmap_lock); 846 ret = ib_copy_to_udata(udata, &uresp, sizeof uresp); 847 if (ret) 848 goto err5; 849 850 mm->key = uresp.key; 851 mm->addr = virt_to_phys(chp->cq.queue); 852 mm->len = chp->cq.memsize; 853 insert_mmap(ucontext, mm); 854 855 mm2->key = uresp.gts_key; 856 mm2->addr = chp->cq.ugts; 857 mm2->len = PAGE_SIZE; 858 insert_mmap(ucontext, mm2); 859 } 860 PDBG("%s cqid 0x%0x chp %p size %u memsize %zu, dma_addr 0x%0llx\n", 861 __func__, chp->cq.cqid, chp, chp->cq.size, 862 chp->cq.memsize, 863 (unsigned long long) chp->cq.dma_addr); 864 return &chp->ibcq; 865 err5: 866 kfree(mm2); 867 err4: 868 kfree(mm); 869 err3: 870 remove_handle(rhp, &rhp->cqidr, chp->cq.cqid); 871 err2: 872 destroy_cq(&chp->rhp->rdev, &chp->cq, 873 ucontext ? &ucontext->uctx : &rhp->rdev.uctx); 874 err1: 875 kfree(chp); 876 return ERR_PTR(ret); 877 } 878 879 int c4iw_resize_cq(struct ib_cq *cq, int cqe, struct ib_udata *udata) 880 { 881 return -ENOSYS; 882 } 883 884 int c4iw_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags) 885 { 886 struct c4iw_cq *chp; 887 int ret; 888 unsigned long flag; 889 890 chp = to_c4iw_cq(ibcq); 891 spin_lock_irqsave(&chp->lock, flag); 892 ret = t4_arm_cq(&chp->cq, 893 (flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED); 894 spin_unlock_irqrestore(&chp->lock, flag); 895 if (ret && !(flags & IB_CQ_REPORT_MISSED_EVENTS)) 896 ret = 0; 897 return ret; 898 } 899