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 <linux/module.h> 34 #include <rdma/uverbs_ioctl.h> 35 36 #include "iw_cxgb4.h" 37 38 static int db_delay_usecs = 1; 39 module_param(db_delay_usecs, int, 0644); 40 MODULE_PARM_DESC(db_delay_usecs, "Usecs to delay awaiting db fifo to drain"); 41 42 static int ocqp_support = 1; 43 module_param(ocqp_support, int, 0644); 44 MODULE_PARM_DESC(ocqp_support, "Support on-chip SQs (default=1)"); 45 46 int db_fc_threshold = 1000; 47 module_param(db_fc_threshold, int, 0644); 48 MODULE_PARM_DESC(db_fc_threshold, 49 "QP count/threshold that triggers" 50 " automatic db flow control mode (default = 1000)"); 51 52 int db_coalescing_threshold; 53 module_param(db_coalescing_threshold, int, 0644); 54 MODULE_PARM_DESC(db_coalescing_threshold, 55 "QP count/threshold that triggers" 56 " disabling db coalescing (default = 0)"); 57 58 static int max_fr_immd = T4_MAX_FR_IMMD; 59 module_param(max_fr_immd, int, 0644); 60 MODULE_PARM_DESC(max_fr_immd, "fastreg threshold for using DSGL instead of immediate"); 61 62 static int alloc_ird(struct c4iw_dev *dev, u32 ird) 63 { 64 int ret = 0; 65 66 xa_lock_irq(&dev->qps); 67 if (ird <= dev->avail_ird) 68 dev->avail_ird -= ird; 69 else 70 ret = -ENOMEM; 71 xa_unlock_irq(&dev->qps); 72 73 if (ret) 74 dev_warn(&dev->rdev.lldi.pdev->dev, 75 "device IRD resources exhausted\n"); 76 77 return ret; 78 } 79 80 static void free_ird(struct c4iw_dev *dev, int ird) 81 { 82 xa_lock_irq(&dev->qps); 83 dev->avail_ird += ird; 84 xa_unlock_irq(&dev->qps); 85 } 86 87 static void set_state(struct c4iw_qp *qhp, enum c4iw_qp_state state) 88 { 89 unsigned long flag; 90 spin_lock_irqsave(&qhp->lock, flag); 91 qhp->attr.state = state; 92 spin_unlock_irqrestore(&qhp->lock, flag); 93 } 94 95 static void dealloc_oc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) 96 { 97 c4iw_ocqp_pool_free(rdev, sq->dma_addr, sq->memsize); 98 } 99 100 static void dealloc_host_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) 101 { 102 dma_free_coherent(&(rdev->lldi.pdev->dev), sq->memsize, sq->queue, 103 dma_unmap_addr(sq, mapping)); 104 } 105 106 static void dealloc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) 107 { 108 if (t4_sq_onchip(sq)) 109 dealloc_oc_sq(rdev, sq); 110 else 111 dealloc_host_sq(rdev, sq); 112 } 113 114 static int alloc_oc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) 115 { 116 if (!ocqp_support || !ocqp_supported(&rdev->lldi)) 117 return -ENOSYS; 118 sq->dma_addr = c4iw_ocqp_pool_alloc(rdev, sq->memsize); 119 if (!sq->dma_addr) 120 return -ENOMEM; 121 sq->phys_addr = rdev->oc_mw_pa + sq->dma_addr - 122 rdev->lldi.vr->ocq.start; 123 sq->queue = (__force union t4_wr *)(rdev->oc_mw_kva + sq->dma_addr - 124 rdev->lldi.vr->ocq.start); 125 sq->flags |= T4_SQ_ONCHIP; 126 return 0; 127 } 128 129 static int alloc_host_sq(struct c4iw_rdev *rdev, struct t4_sq *sq) 130 { 131 sq->queue = dma_alloc_coherent(&(rdev->lldi.pdev->dev), sq->memsize, 132 &(sq->dma_addr), GFP_KERNEL); 133 if (!sq->queue) 134 return -ENOMEM; 135 sq->phys_addr = virt_to_phys(sq->queue); 136 dma_unmap_addr_set(sq, mapping, sq->dma_addr); 137 return 0; 138 } 139 140 static int alloc_sq(struct c4iw_rdev *rdev, struct t4_sq *sq, int user) 141 { 142 int ret = -ENOSYS; 143 if (user) 144 ret = alloc_oc_sq(rdev, sq); 145 if (ret) 146 ret = alloc_host_sq(rdev, sq); 147 return ret; 148 } 149 150 static int destroy_qp(struct c4iw_rdev *rdev, struct t4_wq *wq, 151 struct c4iw_dev_ucontext *uctx, int has_rq) 152 { 153 /* 154 * uP clears EQ contexts when the connection exits rdma mode, 155 * so no need to post a RESET WR for these EQs. 156 */ 157 dealloc_sq(rdev, &wq->sq); 158 kfree(wq->sq.sw_sq); 159 c4iw_put_qpid(rdev, wq->sq.qid, uctx); 160 161 if (has_rq) { 162 dma_free_coherent(&rdev->lldi.pdev->dev, 163 wq->rq.memsize, wq->rq.queue, 164 dma_unmap_addr(&wq->rq, mapping)); 165 c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size); 166 kfree(wq->rq.sw_rq); 167 c4iw_put_qpid(rdev, wq->rq.qid, uctx); 168 } 169 return 0; 170 } 171 172 /* 173 * Determine the BAR2 virtual address and qid. If pbar2_pa is not NULL, 174 * then this is a user mapping so compute the page-aligned physical address 175 * for mapping. 176 */ 177 void __iomem *c4iw_bar2_addrs(struct c4iw_rdev *rdev, unsigned int qid, 178 enum cxgb4_bar2_qtype qtype, 179 unsigned int *pbar2_qid, u64 *pbar2_pa) 180 { 181 u64 bar2_qoffset; 182 int ret; 183 184 ret = cxgb4_bar2_sge_qregs(rdev->lldi.ports[0], qid, qtype, 185 pbar2_pa ? 1 : 0, 186 &bar2_qoffset, pbar2_qid); 187 if (ret) 188 return NULL; 189 190 if (pbar2_pa) 191 *pbar2_pa = (rdev->bar2_pa + bar2_qoffset) & PAGE_MASK; 192 193 if (is_t4(rdev->lldi.adapter_type)) 194 return NULL; 195 196 return rdev->bar2_kva + bar2_qoffset; 197 } 198 199 static int create_qp(struct c4iw_rdev *rdev, struct t4_wq *wq, 200 struct t4_cq *rcq, struct t4_cq *scq, 201 struct c4iw_dev_ucontext *uctx, 202 struct c4iw_wr_wait *wr_waitp, 203 int need_rq) 204 { 205 int user = (uctx != &rdev->uctx); 206 struct fw_ri_res_wr *res_wr; 207 struct fw_ri_res *res; 208 int wr_len; 209 struct sk_buff *skb; 210 int ret = 0; 211 int eqsize; 212 213 wq->sq.qid = c4iw_get_qpid(rdev, uctx); 214 if (!wq->sq.qid) 215 return -ENOMEM; 216 217 if (need_rq) { 218 wq->rq.qid = c4iw_get_qpid(rdev, uctx); 219 if (!wq->rq.qid) { 220 ret = -ENOMEM; 221 goto free_sq_qid; 222 } 223 } 224 225 if (!user) { 226 wq->sq.sw_sq = kcalloc(wq->sq.size, sizeof(*wq->sq.sw_sq), 227 GFP_KERNEL); 228 if (!wq->sq.sw_sq) { 229 ret = -ENOMEM; 230 goto free_rq_qid;//FIXME 231 } 232 233 if (need_rq) { 234 wq->rq.sw_rq = kcalloc(wq->rq.size, 235 sizeof(*wq->rq.sw_rq), 236 GFP_KERNEL); 237 if (!wq->rq.sw_rq) { 238 ret = -ENOMEM; 239 goto free_sw_sq; 240 } 241 } 242 } 243 244 if (need_rq) { 245 /* 246 * RQT must be a power of 2 and at least 16 deep. 247 */ 248 wq->rq.rqt_size = 249 roundup_pow_of_two(max_t(u16, wq->rq.size, 16)); 250 wq->rq.rqt_hwaddr = c4iw_rqtpool_alloc(rdev, wq->rq.rqt_size); 251 if (!wq->rq.rqt_hwaddr) { 252 ret = -ENOMEM; 253 goto free_sw_rq; 254 } 255 } 256 257 ret = alloc_sq(rdev, &wq->sq, user); 258 if (ret) 259 goto free_hwaddr; 260 memset(wq->sq.queue, 0, wq->sq.memsize); 261 dma_unmap_addr_set(&wq->sq, mapping, wq->sq.dma_addr); 262 263 if (need_rq) { 264 wq->rq.queue = dma_alloc_coherent(&rdev->lldi.pdev->dev, 265 wq->rq.memsize, 266 &wq->rq.dma_addr, 267 GFP_KERNEL); 268 if (!wq->rq.queue) { 269 ret = -ENOMEM; 270 goto free_sq; 271 } 272 pr_debug("sq base va 0x%p pa 0x%llx rq base va 0x%p pa 0x%llx\n", 273 wq->sq.queue, 274 (unsigned long long)virt_to_phys(wq->sq.queue), 275 wq->rq.queue, 276 (unsigned long long)virt_to_phys(wq->rq.queue)); 277 dma_unmap_addr_set(&wq->rq, mapping, wq->rq.dma_addr); 278 } 279 280 wq->db = rdev->lldi.db_reg; 281 282 wq->sq.bar2_va = c4iw_bar2_addrs(rdev, wq->sq.qid, 283 CXGB4_BAR2_QTYPE_EGRESS, 284 &wq->sq.bar2_qid, 285 user ? &wq->sq.bar2_pa : NULL); 286 if (need_rq) 287 wq->rq.bar2_va = c4iw_bar2_addrs(rdev, wq->rq.qid, 288 CXGB4_BAR2_QTYPE_EGRESS, 289 &wq->rq.bar2_qid, 290 user ? &wq->rq.bar2_pa : NULL); 291 292 /* 293 * User mode must have bar2 access. 294 */ 295 if (user && (!wq->sq.bar2_pa || (need_rq && !wq->rq.bar2_pa))) { 296 pr_warn("%s: sqid %u or rqid %u not in BAR2 range\n", 297 pci_name(rdev->lldi.pdev), wq->sq.qid, wq->rq.qid); 298 ret = -EINVAL; 299 goto free_dma; 300 } 301 302 wq->rdev = rdev; 303 wq->rq.msn = 1; 304 305 /* build fw_ri_res_wr */ 306 wr_len = sizeof(*res_wr) + 2 * sizeof(*res); 307 if (need_rq) 308 wr_len += sizeof(*res); 309 skb = alloc_skb(wr_len, GFP_KERNEL); 310 if (!skb) { 311 ret = -ENOMEM; 312 goto free_dma; 313 } 314 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0); 315 316 res_wr = __skb_put_zero(skb, wr_len); 317 res_wr->op_nres = cpu_to_be32( 318 FW_WR_OP_V(FW_RI_RES_WR) | 319 FW_RI_RES_WR_NRES_V(need_rq ? 2 : 1) | 320 FW_WR_COMPL_F); 321 res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16)); 322 res_wr->cookie = (uintptr_t)wr_waitp; 323 res = res_wr->res; 324 res->u.sqrq.restype = FW_RI_RES_TYPE_SQ; 325 res->u.sqrq.op = FW_RI_RES_OP_WRITE; 326 327 /* 328 * eqsize is the number of 64B entries plus the status page size. 329 */ 330 eqsize = wq->sq.size * T4_SQ_NUM_SLOTS + 331 rdev->hw_queue.t4_eq_status_entries; 332 333 res->u.sqrq.fetchszm_to_iqid = cpu_to_be32( 334 FW_RI_RES_WR_HOSTFCMODE_V(0) | /* no host cidx updates */ 335 FW_RI_RES_WR_CPRIO_V(0) | /* don't keep in chip cache */ 336 FW_RI_RES_WR_PCIECHN_V(0) | /* set by uP at ri_init time */ 337 (t4_sq_onchip(&wq->sq) ? FW_RI_RES_WR_ONCHIP_F : 0) | 338 FW_RI_RES_WR_IQID_V(scq->cqid)); 339 res->u.sqrq.dcaen_to_eqsize = cpu_to_be32( 340 FW_RI_RES_WR_DCAEN_V(0) | 341 FW_RI_RES_WR_DCACPU_V(0) | 342 FW_RI_RES_WR_FBMIN_V(2) | 343 (t4_sq_onchip(&wq->sq) ? FW_RI_RES_WR_FBMAX_V(2) : 344 FW_RI_RES_WR_FBMAX_V(3)) | 345 FW_RI_RES_WR_CIDXFTHRESHO_V(0) | 346 FW_RI_RES_WR_CIDXFTHRESH_V(0) | 347 FW_RI_RES_WR_EQSIZE_V(eqsize)); 348 res->u.sqrq.eqid = cpu_to_be32(wq->sq.qid); 349 res->u.sqrq.eqaddr = cpu_to_be64(wq->sq.dma_addr); 350 351 if (need_rq) { 352 res++; 353 res->u.sqrq.restype = FW_RI_RES_TYPE_RQ; 354 res->u.sqrq.op = FW_RI_RES_OP_WRITE; 355 356 /* 357 * eqsize is the number of 64B entries plus the status page size 358 */ 359 eqsize = wq->rq.size * T4_RQ_NUM_SLOTS + 360 rdev->hw_queue.t4_eq_status_entries; 361 res->u.sqrq.fetchszm_to_iqid = 362 /* no host cidx updates */ 363 cpu_to_be32(FW_RI_RES_WR_HOSTFCMODE_V(0) | 364 /* don't keep in chip cache */ 365 FW_RI_RES_WR_CPRIO_V(0) | 366 /* set by uP at ri_init time */ 367 FW_RI_RES_WR_PCIECHN_V(0) | 368 FW_RI_RES_WR_IQID_V(rcq->cqid)); 369 res->u.sqrq.dcaen_to_eqsize = 370 cpu_to_be32(FW_RI_RES_WR_DCAEN_V(0) | 371 FW_RI_RES_WR_DCACPU_V(0) | 372 FW_RI_RES_WR_FBMIN_V(2) | 373 FW_RI_RES_WR_FBMAX_V(3) | 374 FW_RI_RES_WR_CIDXFTHRESHO_V(0) | 375 FW_RI_RES_WR_CIDXFTHRESH_V(0) | 376 FW_RI_RES_WR_EQSIZE_V(eqsize)); 377 res->u.sqrq.eqid = cpu_to_be32(wq->rq.qid); 378 res->u.sqrq.eqaddr = cpu_to_be64(wq->rq.dma_addr); 379 } 380 381 c4iw_init_wr_wait(wr_waitp); 382 ret = c4iw_ref_send_wait(rdev, skb, wr_waitp, 0, wq->sq.qid, __func__); 383 if (ret) 384 goto free_dma; 385 386 pr_debug("sqid 0x%x rqid 0x%x kdb 0x%p sq_bar2_addr %p rq_bar2_addr %p\n", 387 wq->sq.qid, wq->rq.qid, wq->db, 388 wq->sq.bar2_va, wq->rq.bar2_va); 389 390 return 0; 391 free_dma: 392 if (need_rq) 393 dma_free_coherent(&rdev->lldi.pdev->dev, 394 wq->rq.memsize, wq->rq.queue, 395 dma_unmap_addr(&wq->rq, mapping)); 396 free_sq: 397 dealloc_sq(rdev, &wq->sq); 398 free_hwaddr: 399 if (need_rq) 400 c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size); 401 free_sw_rq: 402 if (need_rq) 403 kfree(wq->rq.sw_rq); 404 free_sw_sq: 405 kfree(wq->sq.sw_sq); 406 free_rq_qid: 407 if (need_rq) 408 c4iw_put_qpid(rdev, wq->rq.qid, uctx); 409 free_sq_qid: 410 c4iw_put_qpid(rdev, wq->sq.qid, uctx); 411 return ret; 412 } 413 414 static int build_immd(struct t4_sq *sq, struct fw_ri_immd *immdp, 415 const struct ib_send_wr *wr, int max, u32 *plenp) 416 { 417 u8 *dstp, *srcp; 418 u32 plen = 0; 419 int i; 420 int rem, len; 421 422 dstp = (u8 *)immdp->data; 423 for (i = 0; i < wr->num_sge; i++) { 424 if ((plen + wr->sg_list[i].length) > max) 425 return -EMSGSIZE; 426 srcp = (u8 *)(unsigned long)wr->sg_list[i].addr; 427 plen += wr->sg_list[i].length; 428 rem = wr->sg_list[i].length; 429 while (rem) { 430 if (dstp == (u8 *)&sq->queue[sq->size]) 431 dstp = (u8 *)sq->queue; 432 if (rem <= (u8 *)&sq->queue[sq->size] - dstp) 433 len = rem; 434 else 435 len = (u8 *)&sq->queue[sq->size] - dstp; 436 memcpy(dstp, srcp, len); 437 dstp += len; 438 srcp += len; 439 rem -= len; 440 } 441 } 442 len = roundup(plen + sizeof(*immdp), 16) - (plen + sizeof(*immdp)); 443 if (len) 444 memset(dstp, 0, len); 445 immdp->op = FW_RI_DATA_IMMD; 446 immdp->r1 = 0; 447 immdp->r2 = 0; 448 immdp->immdlen = cpu_to_be32(plen); 449 *plenp = plen; 450 return 0; 451 } 452 453 static int build_isgl(__be64 *queue_start, __be64 *queue_end, 454 struct fw_ri_isgl *isglp, struct ib_sge *sg_list, 455 int num_sge, u32 *plenp) 456 457 { 458 int i; 459 u32 plen = 0; 460 __be64 *flitp; 461 462 if ((__be64 *)isglp == queue_end) 463 isglp = (struct fw_ri_isgl *)queue_start; 464 465 flitp = (__be64 *)isglp->sge; 466 467 for (i = 0; i < num_sge; i++) { 468 if ((plen + sg_list[i].length) < plen) 469 return -EMSGSIZE; 470 plen += sg_list[i].length; 471 *flitp = cpu_to_be64(((u64)sg_list[i].lkey << 32) | 472 sg_list[i].length); 473 if (++flitp == queue_end) 474 flitp = queue_start; 475 *flitp = cpu_to_be64(sg_list[i].addr); 476 if (++flitp == queue_end) 477 flitp = queue_start; 478 } 479 *flitp = (__force __be64)0; 480 isglp->op = FW_RI_DATA_ISGL; 481 isglp->r1 = 0; 482 isglp->nsge = cpu_to_be16(num_sge); 483 isglp->r2 = 0; 484 if (plenp) 485 *plenp = plen; 486 return 0; 487 } 488 489 static int build_rdma_send(struct t4_sq *sq, union t4_wr *wqe, 490 const struct ib_send_wr *wr, u8 *len16) 491 { 492 u32 plen; 493 int size; 494 int ret; 495 496 if (wr->num_sge > T4_MAX_SEND_SGE) 497 return -EINVAL; 498 switch (wr->opcode) { 499 case IB_WR_SEND: 500 if (wr->send_flags & IB_SEND_SOLICITED) 501 wqe->send.sendop_pkd = cpu_to_be32( 502 FW_RI_SEND_WR_SENDOP_V(FW_RI_SEND_WITH_SE)); 503 else 504 wqe->send.sendop_pkd = cpu_to_be32( 505 FW_RI_SEND_WR_SENDOP_V(FW_RI_SEND)); 506 wqe->send.stag_inv = 0; 507 break; 508 case IB_WR_SEND_WITH_INV: 509 if (wr->send_flags & IB_SEND_SOLICITED) 510 wqe->send.sendop_pkd = cpu_to_be32( 511 FW_RI_SEND_WR_SENDOP_V(FW_RI_SEND_WITH_SE_INV)); 512 else 513 wqe->send.sendop_pkd = cpu_to_be32( 514 FW_RI_SEND_WR_SENDOP_V(FW_RI_SEND_WITH_INV)); 515 wqe->send.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey); 516 break; 517 518 default: 519 return -EINVAL; 520 } 521 wqe->send.r3 = 0; 522 wqe->send.r4 = 0; 523 524 plen = 0; 525 if (wr->num_sge) { 526 if (wr->send_flags & IB_SEND_INLINE) { 527 ret = build_immd(sq, wqe->send.u.immd_src, wr, 528 T4_MAX_SEND_INLINE, &plen); 529 if (ret) 530 return ret; 531 size = sizeof(wqe->send) + sizeof(struct fw_ri_immd) + 532 plen; 533 } else { 534 ret = build_isgl((__be64 *)sq->queue, 535 (__be64 *)&sq->queue[sq->size], 536 wqe->send.u.isgl_src, 537 wr->sg_list, wr->num_sge, &plen); 538 if (ret) 539 return ret; 540 size = sizeof(wqe->send) + sizeof(struct fw_ri_isgl) + 541 wr->num_sge * sizeof(struct fw_ri_sge); 542 } 543 } else { 544 wqe->send.u.immd_src[0].op = FW_RI_DATA_IMMD; 545 wqe->send.u.immd_src[0].r1 = 0; 546 wqe->send.u.immd_src[0].r2 = 0; 547 wqe->send.u.immd_src[0].immdlen = 0; 548 size = sizeof(wqe->send) + sizeof(struct fw_ri_immd); 549 plen = 0; 550 } 551 *len16 = DIV_ROUND_UP(size, 16); 552 wqe->send.plen = cpu_to_be32(plen); 553 return 0; 554 } 555 556 static int build_rdma_write(struct t4_sq *sq, union t4_wr *wqe, 557 const struct ib_send_wr *wr, u8 *len16) 558 { 559 u32 plen; 560 int size; 561 int ret; 562 563 if (wr->num_sge > T4_MAX_SEND_SGE) 564 return -EINVAL; 565 566 /* 567 * iWARP protocol supports 64 bit immediate data but rdma api 568 * limits it to 32bit. 569 */ 570 if (wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) 571 wqe->write.iw_imm_data.ib_imm_data.imm_data32 = wr->ex.imm_data; 572 else 573 wqe->write.iw_imm_data.ib_imm_data.imm_data32 = 0; 574 wqe->write.stag_sink = cpu_to_be32(rdma_wr(wr)->rkey); 575 wqe->write.to_sink = cpu_to_be64(rdma_wr(wr)->remote_addr); 576 if (wr->num_sge) { 577 if (wr->send_flags & IB_SEND_INLINE) { 578 ret = build_immd(sq, wqe->write.u.immd_src, wr, 579 T4_MAX_WRITE_INLINE, &plen); 580 if (ret) 581 return ret; 582 size = sizeof(wqe->write) + sizeof(struct fw_ri_immd) + 583 plen; 584 } else { 585 ret = build_isgl((__be64 *)sq->queue, 586 (__be64 *)&sq->queue[sq->size], 587 wqe->write.u.isgl_src, 588 wr->sg_list, wr->num_sge, &plen); 589 if (ret) 590 return ret; 591 size = sizeof(wqe->write) + sizeof(struct fw_ri_isgl) + 592 wr->num_sge * sizeof(struct fw_ri_sge); 593 } 594 } else { 595 wqe->write.u.immd_src[0].op = FW_RI_DATA_IMMD; 596 wqe->write.u.immd_src[0].r1 = 0; 597 wqe->write.u.immd_src[0].r2 = 0; 598 wqe->write.u.immd_src[0].immdlen = 0; 599 size = sizeof(wqe->write) + sizeof(struct fw_ri_immd); 600 plen = 0; 601 } 602 *len16 = DIV_ROUND_UP(size, 16); 603 wqe->write.plen = cpu_to_be32(plen); 604 return 0; 605 } 606 607 static void build_immd_cmpl(struct t4_sq *sq, struct fw_ri_immd_cmpl *immdp, 608 struct ib_send_wr *wr) 609 { 610 memcpy((u8 *)immdp->data, (u8 *)(uintptr_t)wr->sg_list->addr, 16); 611 memset(immdp->r1, 0, 6); 612 immdp->op = FW_RI_DATA_IMMD; 613 immdp->immdlen = 16; 614 } 615 616 static void build_rdma_write_cmpl(struct t4_sq *sq, 617 struct fw_ri_rdma_write_cmpl_wr *wcwr, 618 const struct ib_send_wr *wr, u8 *len16) 619 { 620 u32 plen; 621 int size; 622 623 /* 624 * This code assumes the struct fields preceding the write isgl 625 * fit in one 64B WR slot. This is because the WQE is built 626 * directly in the dma queue, and wrapping is only handled 627 * by the code buildling sgls. IE the "fixed part" of the wr 628 * structs must all fit in 64B. The WQE build code should probably be 629 * redesigned to avoid this restriction, but for now just add 630 * the BUILD_BUG_ON() to catch if this WQE struct gets too big. 631 */ 632 BUILD_BUG_ON(offsetof(struct fw_ri_rdma_write_cmpl_wr, u) > 64); 633 634 wcwr->stag_sink = cpu_to_be32(rdma_wr(wr)->rkey); 635 wcwr->to_sink = cpu_to_be64(rdma_wr(wr)->remote_addr); 636 if (wr->next->opcode == IB_WR_SEND) 637 wcwr->stag_inv = 0; 638 else 639 wcwr->stag_inv = cpu_to_be32(wr->next->ex.invalidate_rkey); 640 wcwr->r2 = 0; 641 wcwr->r3 = 0; 642 643 /* SEND_INV SGL */ 644 if (wr->next->send_flags & IB_SEND_INLINE) 645 build_immd_cmpl(sq, &wcwr->u_cmpl.immd_src, wr->next); 646 else 647 build_isgl((__be64 *)sq->queue, (__be64 *)&sq->queue[sq->size], 648 &wcwr->u_cmpl.isgl_src, wr->next->sg_list, 1, NULL); 649 650 /* WRITE SGL */ 651 build_isgl((__be64 *)sq->queue, (__be64 *)&sq->queue[sq->size], 652 wcwr->u.isgl_src, wr->sg_list, wr->num_sge, &plen); 653 654 size = sizeof(*wcwr) + sizeof(struct fw_ri_isgl) + 655 wr->num_sge * sizeof(struct fw_ri_sge); 656 wcwr->plen = cpu_to_be32(plen); 657 *len16 = DIV_ROUND_UP(size, 16); 658 } 659 660 static int build_rdma_read(union t4_wr *wqe, const struct ib_send_wr *wr, 661 u8 *len16) 662 { 663 if (wr->num_sge > 1) 664 return -EINVAL; 665 if (wr->num_sge && wr->sg_list[0].length) { 666 wqe->read.stag_src = cpu_to_be32(rdma_wr(wr)->rkey); 667 wqe->read.to_src_hi = cpu_to_be32((u32)(rdma_wr(wr)->remote_addr 668 >> 32)); 669 wqe->read.to_src_lo = cpu_to_be32((u32)rdma_wr(wr)->remote_addr); 670 wqe->read.stag_sink = cpu_to_be32(wr->sg_list[0].lkey); 671 wqe->read.plen = cpu_to_be32(wr->sg_list[0].length); 672 wqe->read.to_sink_hi = cpu_to_be32((u32)(wr->sg_list[0].addr 673 >> 32)); 674 wqe->read.to_sink_lo = cpu_to_be32((u32)(wr->sg_list[0].addr)); 675 } else { 676 wqe->read.stag_src = cpu_to_be32(2); 677 wqe->read.to_src_hi = 0; 678 wqe->read.to_src_lo = 0; 679 wqe->read.stag_sink = cpu_to_be32(2); 680 wqe->read.plen = 0; 681 wqe->read.to_sink_hi = 0; 682 wqe->read.to_sink_lo = 0; 683 } 684 wqe->read.r2 = 0; 685 wqe->read.r5 = 0; 686 *len16 = DIV_ROUND_UP(sizeof(wqe->read), 16); 687 return 0; 688 } 689 690 static void post_write_cmpl(struct c4iw_qp *qhp, const struct ib_send_wr *wr) 691 { 692 bool send_signaled = (wr->next->send_flags & IB_SEND_SIGNALED) || 693 qhp->sq_sig_all; 694 bool write_signaled = (wr->send_flags & IB_SEND_SIGNALED) || 695 qhp->sq_sig_all; 696 struct t4_swsqe *swsqe; 697 union t4_wr *wqe; 698 u16 write_wrid; 699 u8 len16; 700 u16 idx; 701 702 /* 703 * The sw_sq entries still look like a WRITE and a SEND and consume 704 * 2 slots. The FW WR, however, will be a single uber-WR. 705 */ 706 wqe = (union t4_wr *)((u8 *)qhp->wq.sq.queue + 707 qhp->wq.sq.wq_pidx * T4_EQ_ENTRY_SIZE); 708 build_rdma_write_cmpl(&qhp->wq.sq, &wqe->write_cmpl, wr, &len16); 709 710 /* WRITE swsqe */ 711 swsqe = &qhp->wq.sq.sw_sq[qhp->wq.sq.pidx]; 712 swsqe->opcode = FW_RI_RDMA_WRITE; 713 swsqe->idx = qhp->wq.sq.pidx; 714 swsqe->complete = 0; 715 swsqe->signaled = write_signaled; 716 swsqe->flushed = 0; 717 swsqe->wr_id = wr->wr_id; 718 if (c4iw_wr_log) { 719 swsqe->sge_ts = 720 cxgb4_read_sge_timestamp(qhp->rhp->rdev.lldi.ports[0]); 721 swsqe->host_time = ktime_get(); 722 } 723 724 write_wrid = qhp->wq.sq.pidx; 725 726 /* just bump the sw_sq */ 727 qhp->wq.sq.in_use++; 728 if (++qhp->wq.sq.pidx == qhp->wq.sq.size) 729 qhp->wq.sq.pidx = 0; 730 731 /* SEND_WITH_INV swsqe */ 732 swsqe = &qhp->wq.sq.sw_sq[qhp->wq.sq.pidx]; 733 if (wr->next->opcode == IB_WR_SEND) 734 swsqe->opcode = FW_RI_SEND; 735 else 736 swsqe->opcode = FW_RI_SEND_WITH_INV; 737 swsqe->idx = qhp->wq.sq.pidx; 738 swsqe->complete = 0; 739 swsqe->signaled = send_signaled; 740 swsqe->flushed = 0; 741 swsqe->wr_id = wr->next->wr_id; 742 if (c4iw_wr_log) { 743 swsqe->sge_ts = 744 cxgb4_read_sge_timestamp(qhp->rhp->rdev.lldi.ports[0]); 745 swsqe->host_time = ktime_get(); 746 } 747 748 wqe->write_cmpl.flags_send = send_signaled ? FW_RI_COMPLETION_FLAG : 0; 749 wqe->write_cmpl.wrid_send = qhp->wq.sq.pidx; 750 751 init_wr_hdr(wqe, write_wrid, FW_RI_RDMA_WRITE_CMPL_WR, 752 write_signaled ? FW_RI_COMPLETION_FLAG : 0, len16); 753 t4_sq_produce(&qhp->wq, len16); 754 idx = DIV_ROUND_UP(len16 * 16, T4_EQ_ENTRY_SIZE); 755 756 t4_ring_sq_db(&qhp->wq, idx, wqe); 757 } 758 759 static int build_rdma_recv(struct c4iw_qp *qhp, union t4_recv_wr *wqe, 760 const struct ib_recv_wr *wr, u8 *len16) 761 { 762 int ret; 763 764 ret = build_isgl((__be64 *)qhp->wq.rq.queue, 765 (__be64 *)&qhp->wq.rq.queue[qhp->wq.rq.size], 766 &wqe->recv.isgl, wr->sg_list, wr->num_sge, NULL); 767 if (ret) 768 return ret; 769 *len16 = DIV_ROUND_UP( 770 sizeof(wqe->recv) + wr->num_sge * sizeof(struct fw_ri_sge), 16); 771 return 0; 772 } 773 774 static int build_srq_recv(union t4_recv_wr *wqe, const struct ib_recv_wr *wr, 775 u8 *len16) 776 { 777 int ret; 778 779 ret = build_isgl((__be64 *)wqe, (__be64 *)(wqe + 1), 780 &wqe->recv.isgl, wr->sg_list, wr->num_sge, NULL); 781 if (ret) 782 return ret; 783 *len16 = DIV_ROUND_UP(sizeof(wqe->recv) + 784 wr->num_sge * sizeof(struct fw_ri_sge), 16); 785 return 0; 786 } 787 788 static void build_tpte_memreg(struct fw_ri_fr_nsmr_tpte_wr *fr, 789 const struct ib_reg_wr *wr, struct c4iw_mr *mhp, 790 u8 *len16) 791 { 792 __be64 *p = (__be64 *)fr->pbl; 793 794 fr->r2 = cpu_to_be32(0); 795 fr->stag = cpu_to_be32(mhp->ibmr.rkey); 796 797 fr->tpte.valid_to_pdid = cpu_to_be32(FW_RI_TPTE_VALID_F | 798 FW_RI_TPTE_STAGKEY_V((mhp->ibmr.rkey & FW_RI_TPTE_STAGKEY_M)) | 799 FW_RI_TPTE_STAGSTATE_V(1) | 800 FW_RI_TPTE_STAGTYPE_V(FW_RI_STAG_NSMR) | 801 FW_RI_TPTE_PDID_V(mhp->attr.pdid)); 802 fr->tpte.locread_to_qpid = cpu_to_be32( 803 FW_RI_TPTE_PERM_V(c4iw_ib_to_tpt_access(wr->access)) | 804 FW_RI_TPTE_ADDRTYPE_V(FW_RI_VA_BASED_TO) | 805 FW_RI_TPTE_PS_V(ilog2(wr->mr->page_size) - 12)); 806 fr->tpte.nosnoop_pbladdr = cpu_to_be32(FW_RI_TPTE_PBLADDR_V( 807 PBL_OFF(&mhp->rhp->rdev, mhp->attr.pbl_addr)>>3)); 808 fr->tpte.dca_mwbcnt_pstag = cpu_to_be32(0); 809 fr->tpte.len_hi = cpu_to_be32(0); 810 fr->tpte.len_lo = cpu_to_be32(mhp->ibmr.length); 811 fr->tpte.va_hi = cpu_to_be32(mhp->ibmr.iova >> 32); 812 fr->tpte.va_lo_fbo = cpu_to_be32(mhp->ibmr.iova & 0xffffffff); 813 814 p[0] = cpu_to_be64((u64)mhp->mpl[0]); 815 p[1] = cpu_to_be64((u64)mhp->mpl[1]); 816 817 *len16 = DIV_ROUND_UP(sizeof(*fr), 16); 818 } 819 820 static int build_memreg(struct t4_sq *sq, union t4_wr *wqe, 821 const struct ib_reg_wr *wr, struct c4iw_mr *mhp, 822 u8 *len16, bool dsgl_supported) 823 { 824 struct fw_ri_immd *imdp; 825 __be64 *p; 826 int i; 827 int pbllen = roundup(mhp->mpl_len * sizeof(u64), 32); 828 int rem; 829 830 if (mhp->mpl_len > t4_max_fr_depth(dsgl_supported && use_dsgl)) 831 return -EINVAL; 832 833 wqe->fr.qpbinde_to_dcacpu = 0; 834 wqe->fr.pgsz_shift = ilog2(wr->mr->page_size) - 12; 835 wqe->fr.addr_type = FW_RI_VA_BASED_TO; 836 wqe->fr.mem_perms = c4iw_ib_to_tpt_access(wr->access); 837 wqe->fr.len_hi = 0; 838 wqe->fr.len_lo = cpu_to_be32(mhp->ibmr.length); 839 wqe->fr.stag = cpu_to_be32(wr->key); 840 wqe->fr.va_hi = cpu_to_be32(mhp->ibmr.iova >> 32); 841 wqe->fr.va_lo_fbo = cpu_to_be32(mhp->ibmr.iova & 842 0xffffffff); 843 844 if (dsgl_supported && use_dsgl && (pbllen > max_fr_immd)) { 845 struct fw_ri_dsgl *sglp; 846 847 for (i = 0; i < mhp->mpl_len; i++) 848 mhp->mpl[i] = (__force u64)cpu_to_be64((u64)mhp->mpl[i]); 849 850 sglp = (struct fw_ri_dsgl *)(&wqe->fr + 1); 851 sglp->op = FW_RI_DATA_DSGL; 852 sglp->r1 = 0; 853 sglp->nsge = cpu_to_be16(1); 854 sglp->addr0 = cpu_to_be64(mhp->mpl_addr); 855 sglp->len0 = cpu_to_be32(pbllen); 856 857 *len16 = DIV_ROUND_UP(sizeof(wqe->fr) + sizeof(*sglp), 16); 858 } else { 859 imdp = (struct fw_ri_immd *)(&wqe->fr + 1); 860 imdp->op = FW_RI_DATA_IMMD; 861 imdp->r1 = 0; 862 imdp->r2 = 0; 863 imdp->immdlen = cpu_to_be32(pbllen); 864 p = (__be64 *)(imdp + 1); 865 rem = pbllen; 866 for (i = 0; i < mhp->mpl_len; i++) { 867 *p = cpu_to_be64((u64)mhp->mpl[i]); 868 rem -= sizeof(*p); 869 if (++p == (__be64 *)&sq->queue[sq->size]) 870 p = (__be64 *)sq->queue; 871 } 872 while (rem) { 873 *p = 0; 874 rem -= sizeof(*p); 875 if (++p == (__be64 *)&sq->queue[sq->size]) 876 p = (__be64 *)sq->queue; 877 } 878 *len16 = DIV_ROUND_UP(sizeof(wqe->fr) + sizeof(*imdp) 879 + pbllen, 16); 880 } 881 return 0; 882 } 883 884 static int build_inv_stag(union t4_wr *wqe, const struct ib_send_wr *wr, 885 u8 *len16) 886 { 887 wqe->inv.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey); 888 wqe->inv.r2 = 0; 889 *len16 = DIV_ROUND_UP(sizeof(wqe->inv), 16); 890 return 0; 891 } 892 893 void c4iw_qp_add_ref(struct ib_qp *qp) 894 { 895 pr_debug("ib_qp %p\n", qp); 896 refcount_inc(&to_c4iw_qp(qp)->qp_refcnt); 897 } 898 899 void c4iw_qp_rem_ref(struct ib_qp *qp) 900 { 901 pr_debug("ib_qp %p\n", qp); 902 if (refcount_dec_and_test(&to_c4iw_qp(qp)->qp_refcnt)) 903 complete(&to_c4iw_qp(qp)->qp_rel_comp); 904 } 905 906 static void add_to_fc_list(struct list_head *head, struct list_head *entry) 907 { 908 if (list_empty(entry)) 909 list_add_tail(entry, head); 910 } 911 912 static int ring_kernel_sq_db(struct c4iw_qp *qhp, u16 inc) 913 { 914 unsigned long flags; 915 916 xa_lock_irqsave(&qhp->rhp->qps, flags); 917 spin_lock(&qhp->lock); 918 if (qhp->rhp->db_state == NORMAL) 919 t4_ring_sq_db(&qhp->wq, inc, NULL); 920 else { 921 add_to_fc_list(&qhp->rhp->db_fc_list, &qhp->db_fc_entry); 922 qhp->wq.sq.wq_pidx_inc += inc; 923 } 924 spin_unlock(&qhp->lock); 925 xa_unlock_irqrestore(&qhp->rhp->qps, flags); 926 return 0; 927 } 928 929 static int ring_kernel_rq_db(struct c4iw_qp *qhp, u16 inc) 930 { 931 unsigned long flags; 932 933 xa_lock_irqsave(&qhp->rhp->qps, flags); 934 spin_lock(&qhp->lock); 935 if (qhp->rhp->db_state == NORMAL) 936 t4_ring_rq_db(&qhp->wq, inc, NULL); 937 else { 938 add_to_fc_list(&qhp->rhp->db_fc_list, &qhp->db_fc_entry); 939 qhp->wq.rq.wq_pidx_inc += inc; 940 } 941 spin_unlock(&qhp->lock); 942 xa_unlock_irqrestore(&qhp->rhp->qps, flags); 943 return 0; 944 } 945 946 static int ib_to_fw_opcode(int ib_opcode) 947 { 948 int opcode; 949 950 switch (ib_opcode) { 951 case IB_WR_SEND_WITH_INV: 952 opcode = FW_RI_SEND_WITH_INV; 953 break; 954 case IB_WR_SEND: 955 opcode = FW_RI_SEND; 956 break; 957 case IB_WR_RDMA_WRITE: 958 opcode = FW_RI_RDMA_WRITE; 959 break; 960 case IB_WR_RDMA_WRITE_WITH_IMM: 961 opcode = FW_RI_WRITE_IMMEDIATE; 962 break; 963 case IB_WR_RDMA_READ: 964 case IB_WR_RDMA_READ_WITH_INV: 965 opcode = FW_RI_READ_REQ; 966 break; 967 case IB_WR_REG_MR: 968 opcode = FW_RI_FAST_REGISTER; 969 break; 970 case IB_WR_LOCAL_INV: 971 opcode = FW_RI_LOCAL_INV; 972 break; 973 default: 974 opcode = -EINVAL; 975 } 976 return opcode; 977 } 978 979 static int complete_sq_drain_wr(struct c4iw_qp *qhp, 980 const struct ib_send_wr *wr) 981 { 982 struct t4_cqe cqe = {}; 983 struct c4iw_cq *schp; 984 unsigned long flag; 985 struct t4_cq *cq; 986 int opcode; 987 988 schp = to_c4iw_cq(qhp->ibqp.send_cq); 989 cq = &schp->cq; 990 991 opcode = ib_to_fw_opcode(wr->opcode); 992 if (opcode < 0) 993 return opcode; 994 995 cqe.u.drain_cookie = wr->wr_id; 996 cqe.header = cpu_to_be32(CQE_STATUS_V(T4_ERR_SWFLUSH) | 997 CQE_OPCODE_V(opcode) | 998 CQE_TYPE_V(1) | 999 CQE_SWCQE_V(1) | 1000 CQE_DRAIN_V(1) | 1001 CQE_QPID_V(qhp->wq.sq.qid)); 1002 1003 spin_lock_irqsave(&schp->lock, flag); 1004 cqe.bits_type_ts = cpu_to_be64(CQE_GENBIT_V((u64)cq->gen)); 1005 cq->sw_queue[cq->sw_pidx] = cqe; 1006 t4_swcq_produce(cq); 1007 spin_unlock_irqrestore(&schp->lock, flag); 1008 1009 if (t4_clear_cq_armed(&schp->cq)) { 1010 spin_lock_irqsave(&schp->comp_handler_lock, flag); 1011 (*schp->ibcq.comp_handler)(&schp->ibcq, 1012 schp->ibcq.cq_context); 1013 spin_unlock_irqrestore(&schp->comp_handler_lock, flag); 1014 } 1015 return 0; 1016 } 1017 1018 static int complete_sq_drain_wrs(struct c4iw_qp *qhp, 1019 const struct ib_send_wr *wr, 1020 const struct ib_send_wr **bad_wr) 1021 { 1022 int ret = 0; 1023 1024 while (wr) { 1025 ret = complete_sq_drain_wr(qhp, wr); 1026 if (ret) { 1027 *bad_wr = wr; 1028 break; 1029 } 1030 wr = wr->next; 1031 } 1032 return ret; 1033 } 1034 1035 static void complete_rq_drain_wr(struct c4iw_qp *qhp, 1036 const struct ib_recv_wr *wr) 1037 { 1038 struct t4_cqe cqe = {}; 1039 struct c4iw_cq *rchp; 1040 unsigned long flag; 1041 struct t4_cq *cq; 1042 1043 rchp = to_c4iw_cq(qhp->ibqp.recv_cq); 1044 cq = &rchp->cq; 1045 1046 cqe.u.drain_cookie = wr->wr_id; 1047 cqe.header = cpu_to_be32(CQE_STATUS_V(T4_ERR_SWFLUSH) | 1048 CQE_OPCODE_V(FW_RI_SEND) | 1049 CQE_TYPE_V(0) | 1050 CQE_SWCQE_V(1) | 1051 CQE_DRAIN_V(1) | 1052 CQE_QPID_V(qhp->wq.sq.qid)); 1053 1054 spin_lock_irqsave(&rchp->lock, flag); 1055 cqe.bits_type_ts = cpu_to_be64(CQE_GENBIT_V((u64)cq->gen)); 1056 cq->sw_queue[cq->sw_pidx] = cqe; 1057 t4_swcq_produce(cq); 1058 spin_unlock_irqrestore(&rchp->lock, flag); 1059 1060 if (t4_clear_cq_armed(&rchp->cq)) { 1061 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 1062 (*rchp->ibcq.comp_handler)(&rchp->ibcq, 1063 rchp->ibcq.cq_context); 1064 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 1065 } 1066 } 1067 1068 static void complete_rq_drain_wrs(struct c4iw_qp *qhp, 1069 const struct ib_recv_wr *wr) 1070 { 1071 while (wr) { 1072 complete_rq_drain_wr(qhp, wr); 1073 wr = wr->next; 1074 } 1075 } 1076 1077 int c4iw_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, 1078 const struct ib_send_wr **bad_wr) 1079 { 1080 int err = 0; 1081 u8 len16 = 0; 1082 enum fw_wr_opcodes fw_opcode = 0; 1083 enum fw_ri_wr_flags fw_flags; 1084 struct c4iw_qp *qhp; 1085 struct c4iw_dev *rhp; 1086 union t4_wr *wqe = NULL; 1087 u32 num_wrs; 1088 struct t4_swsqe *swsqe; 1089 unsigned long flag; 1090 u16 idx = 0; 1091 1092 qhp = to_c4iw_qp(ibqp); 1093 rhp = qhp->rhp; 1094 spin_lock_irqsave(&qhp->lock, flag); 1095 1096 /* 1097 * If the qp has been flushed, then just insert a special 1098 * drain cqe. 1099 */ 1100 if (qhp->wq.flushed) { 1101 spin_unlock_irqrestore(&qhp->lock, flag); 1102 err = complete_sq_drain_wrs(qhp, wr, bad_wr); 1103 return err; 1104 } 1105 num_wrs = t4_sq_avail(&qhp->wq); 1106 if (num_wrs == 0) { 1107 spin_unlock_irqrestore(&qhp->lock, flag); 1108 *bad_wr = wr; 1109 return -ENOMEM; 1110 } 1111 1112 /* 1113 * Fastpath for NVMe-oF target WRITE + SEND_WITH_INV wr chain which is 1114 * the response for small NVMEe-oF READ requests. If the chain is 1115 * exactly a WRITE->SEND_WITH_INV or a WRITE->SEND and the sgl depths 1116 * and lengths meet the requirements of the fw_ri_write_cmpl_wr work 1117 * request, then build and post the write_cmpl WR. If any of the tests 1118 * below are not true, then we continue on with the tradtional WRITE 1119 * and SEND WRs. 1120 */ 1121 if (qhp->rhp->rdev.lldi.write_cmpl_support && 1122 CHELSIO_CHIP_VERSION(qhp->rhp->rdev.lldi.adapter_type) >= 1123 CHELSIO_T5 && 1124 wr && wr->next && !wr->next->next && 1125 wr->opcode == IB_WR_RDMA_WRITE && 1126 wr->sg_list[0].length && wr->num_sge <= T4_WRITE_CMPL_MAX_SGL && 1127 (wr->next->opcode == IB_WR_SEND || 1128 wr->next->opcode == IB_WR_SEND_WITH_INV) && 1129 wr->next->sg_list[0].length == T4_WRITE_CMPL_MAX_CQE && 1130 wr->next->num_sge == 1 && num_wrs >= 2) { 1131 post_write_cmpl(qhp, wr); 1132 spin_unlock_irqrestore(&qhp->lock, flag); 1133 return 0; 1134 } 1135 1136 while (wr) { 1137 if (num_wrs == 0) { 1138 err = -ENOMEM; 1139 *bad_wr = wr; 1140 break; 1141 } 1142 wqe = (union t4_wr *)((u8 *)qhp->wq.sq.queue + 1143 qhp->wq.sq.wq_pidx * T4_EQ_ENTRY_SIZE); 1144 1145 fw_flags = 0; 1146 if (wr->send_flags & IB_SEND_SOLICITED) 1147 fw_flags |= FW_RI_SOLICITED_EVENT_FLAG; 1148 if (wr->send_flags & IB_SEND_SIGNALED || qhp->sq_sig_all) 1149 fw_flags |= FW_RI_COMPLETION_FLAG; 1150 swsqe = &qhp->wq.sq.sw_sq[qhp->wq.sq.pidx]; 1151 switch (wr->opcode) { 1152 case IB_WR_SEND_WITH_INV: 1153 case IB_WR_SEND: 1154 if (wr->send_flags & IB_SEND_FENCE) 1155 fw_flags |= FW_RI_READ_FENCE_FLAG; 1156 fw_opcode = FW_RI_SEND_WR; 1157 if (wr->opcode == IB_WR_SEND) 1158 swsqe->opcode = FW_RI_SEND; 1159 else 1160 swsqe->opcode = FW_RI_SEND_WITH_INV; 1161 err = build_rdma_send(&qhp->wq.sq, wqe, wr, &len16); 1162 break; 1163 case IB_WR_RDMA_WRITE_WITH_IMM: 1164 if (unlikely(!rhp->rdev.lldi.write_w_imm_support)) { 1165 err = -EINVAL; 1166 break; 1167 } 1168 fw_flags |= FW_RI_RDMA_WRITE_WITH_IMMEDIATE; 1169 fallthrough; 1170 case IB_WR_RDMA_WRITE: 1171 fw_opcode = FW_RI_RDMA_WRITE_WR; 1172 swsqe->opcode = FW_RI_RDMA_WRITE; 1173 err = build_rdma_write(&qhp->wq.sq, wqe, wr, &len16); 1174 break; 1175 case IB_WR_RDMA_READ: 1176 case IB_WR_RDMA_READ_WITH_INV: 1177 fw_opcode = FW_RI_RDMA_READ_WR; 1178 swsqe->opcode = FW_RI_READ_REQ; 1179 if (wr->opcode == IB_WR_RDMA_READ_WITH_INV) { 1180 c4iw_invalidate_mr(rhp, wr->sg_list[0].lkey); 1181 fw_flags = FW_RI_RDMA_READ_INVALIDATE; 1182 } else { 1183 fw_flags = 0; 1184 } 1185 err = build_rdma_read(wqe, wr, &len16); 1186 if (err) 1187 break; 1188 swsqe->read_len = wr->sg_list[0].length; 1189 if (!qhp->wq.sq.oldest_read) 1190 qhp->wq.sq.oldest_read = swsqe; 1191 break; 1192 case IB_WR_REG_MR: { 1193 struct c4iw_mr *mhp = to_c4iw_mr(reg_wr(wr)->mr); 1194 1195 swsqe->opcode = FW_RI_FAST_REGISTER; 1196 if (rhp->rdev.lldi.fr_nsmr_tpte_wr_support && 1197 !mhp->attr.state && mhp->mpl_len <= 2) { 1198 fw_opcode = FW_RI_FR_NSMR_TPTE_WR; 1199 build_tpte_memreg(&wqe->fr_tpte, reg_wr(wr), 1200 mhp, &len16); 1201 } else { 1202 fw_opcode = FW_RI_FR_NSMR_WR; 1203 err = build_memreg(&qhp->wq.sq, wqe, reg_wr(wr), 1204 mhp, &len16, 1205 rhp->rdev.lldi.ulptx_memwrite_dsgl); 1206 if (err) 1207 break; 1208 } 1209 mhp->attr.state = 1; 1210 break; 1211 } 1212 case IB_WR_LOCAL_INV: 1213 if (wr->send_flags & IB_SEND_FENCE) 1214 fw_flags |= FW_RI_LOCAL_FENCE_FLAG; 1215 fw_opcode = FW_RI_INV_LSTAG_WR; 1216 swsqe->opcode = FW_RI_LOCAL_INV; 1217 err = build_inv_stag(wqe, wr, &len16); 1218 c4iw_invalidate_mr(rhp, wr->ex.invalidate_rkey); 1219 break; 1220 default: 1221 pr_warn("%s post of type=%d TBD!\n", __func__, 1222 wr->opcode); 1223 err = -EINVAL; 1224 } 1225 if (err) { 1226 *bad_wr = wr; 1227 break; 1228 } 1229 swsqe->idx = qhp->wq.sq.pidx; 1230 swsqe->complete = 0; 1231 swsqe->signaled = (wr->send_flags & IB_SEND_SIGNALED) || 1232 qhp->sq_sig_all; 1233 swsqe->flushed = 0; 1234 swsqe->wr_id = wr->wr_id; 1235 if (c4iw_wr_log) { 1236 swsqe->sge_ts = cxgb4_read_sge_timestamp( 1237 rhp->rdev.lldi.ports[0]); 1238 swsqe->host_time = ktime_get(); 1239 } 1240 1241 init_wr_hdr(wqe, qhp->wq.sq.pidx, fw_opcode, fw_flags, len16); 1242 1243 pr_debug("cookie 0x%llx pidx 0x%x opcode 0x%x read_len %u\n", 1244 (unsigned long long)wr->wr_id, qhp->wq.sq.pidx, 1245 swsqe->opcode, swsqe->read_len); 1246 wr = wr->next; 1247 num_wrs--; 1248 t4_sq_produce(&qhp->wq, len16); 1249 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); 1250 } 1251 if (!rhp->rdev.status_page->db_off) { 1252 t4_ring_sq_db(&qhp->wq, idx, wqe); 1253 spin_unlock_irqrestore(&qhp->lock, flag); 1254 } else { 1255 spin_unlock_irqrestore(&qhp->lock, flag); 1256 ring_kernel_sq_db(qhp, idx); 1257 } 1258 return err; 1259 } 1260 1261 int c4iw_post_receive(struct ib_qp *ibqp, const struct ib_recv_wr *wr, 1262 const struct ib_recv_wr **bad_wr) 1263 { 1264 int err = 0; 1265 struct c4iw_qp *qhp; 1266 union t4_recv_wr *wqe = NULL; 1267 u32 num_wrs; 1268 u8 len16 = 0; 1269 unsigned long flag; 1270 u16 idx = 0; 1271 1272 qhp = to_c4iw_qp(ibqp); 1273 spin_lock_irqsave(&qhp->lock, flag); 1274 1275 /* 1276 * If the qp has been flushed, then just insert a special 1277 * drain cqe. 1278 */ 1279 if (qhp->wq.flushed) { 1280 spin_unlock_irqrestore(&qhp->lock, flag); 1281 complete_rq_drain_wrs(qhp, wr); 1282 return err; 1283 } 1284 num_wrs = t4_rq_avail(&qhp->wq); 1285 if (num_wrs == 0) { 1286 spin_unlock_irqrestore(&qhp->lock, flag); 1287 *bad_wr = wr; 1288 return -ENOMEM; 1289 } 1290 while (wr) { 1291 if (wr->num_sge > T4_MAX_RECV_SGE) { 1292 err = -EINVAL; 1293 *bad_wr = wr; 1294 break; 1295 } 1296 wqe = (union t4_recv_wr *)((u8 *)qhp->wq.rq.queue + 1297 qhp->wq.rq.wq_pidx * 1298 T4_EQ_ENTRY_SIZE); 1299 if (num_wrs) 1300 err = build_rdma_recv(qhp, wqe, wr, &len16); 1301 else 1302 err = -ENOMEM; 1303 if (err) { 1304 *bad_wr = wr; 1305 break; 1306 } 1307 1308 qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].wr_id = wr->wr_id; 1309 if (c4iw_wr_log) { 1310 qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].sge_ts = 1311 cxgb4_read_sge_timestamp( 1312 qhp->rhp->rdev.lldi.ports[0]); 1313 qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].host_time = 1314 ktime_get(); 1315 } 1316 1317 wqe->recv.opcode = FW_RI_RECV_WR; 1318 wqe->recv.r1 = 0; 1319 wqe->recv.wrid = qhp->wq.rq.pidx; 1320 wqe->recv.r2[0] = 0; 1321 wqe->recv.r2[1] = 0; 1322 wqe->recv.r2[2] = 0; 1323 wqe->recv.len16 = len16; 1324 pr_debug("cookie 0x%llx pidx %u\n", 1325 (unsigned long long)wr->wr_id, qhp->wq.rq.pidx); 1326 t4_rq_produce(&qhp->wq, len16); 1327 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); 1328 wr = wr->next; 1329 num_wrs--; 1330 } 1331 if (!qhp->rhp->rdev.status_page->db_off) { 1332 t4_ring_rq_db(&qhp->wq, idx, wqe); 1333 spin_unlock_irqrestore(&qhp->lock, flag); 1334 } else { 1335 spin_unlock_irqrestore(&qhp->lock, flag); 1336 ring_kernel_rq_db(qhp, idx); 1337 } 1338 return err; 1339 } 1340 1341 static void defer_srq_wr(struct t4_srq *srq, union t4_recv_wr *wqe, 1342 u64 wr_id, u8 len16) 1343 { 1344 struct t4_srq_pending_wr *pwr = &srq->pending_wrs[srq->pending_pidx]; 1345 1346 pr_debug("%s cidx %u pidx %u wq_pidx %u in_use %u ooo_count %u wr_id 0x%llx pending_cidx %u pending_pidx %u pending_in_use %u\n", 1347 __func__, srq->cidx, srq->pidx, srq->wq_pidx, 1348 srq->in_use, srq->ooo_count, 1349 (unsigned long long)wr_id, srq->pending_cidx, 1350 srq->pending_pidx, srq->pending_in_use); 1351 pwr->wr_id = wr_id; 1352 pwr->len16 = len16; 1353 memcpy(&pwr->wqe, wqe, len16 * 16); 1354 t4_srq_produce_pending_wr(srq); 1355 } 1356 1357 int c4iw_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr, 1358 const struct ib_recv_wr **bad_wr) 1359 { 1360 union t4_recv_wr *wqe, lwqe; 1361 struct c4iw_srq *srq; 1362 unsigned long flag; 1363 u8 len16 = 0; 1364 u16 idx = 0; 1365 int err = 0; 1366 u32 num_wrs; 1367 1368 srq = to_c4iw_srq(ibsrq); 1369 spin_lock_irqsave(&srq->lock, flag); 1370 num_wrs = t4_srq_avail(&srq->wq); 1371 if (num_wrs == 0) { 1372 spin_unlock_irqrestore(&srq->lock, flag); 1373 return -ENOMEM; 1374 } 1375 while (wr) { 1376 if (wr->num_sge > T4_MAX_RECV_SGE) { 1377 err = -EINVAL; 1378 *bad_wr = wr; 1379 break; 1380 } 1381 wqe = &lwqe; 1382 if (num_wrs) 1383 err = build_srq_recv(wqe, wr, &len16); 1384 else 1385 err = -ENOMEM; 1386 if (err) { 1387 *bad_wr = wr; 1388 break; 1389 } 1390 1391 wqe->recv.opcode = FW_RI_RECV_WR; 1392 wqe->recv.r1 = 0; 1393 wqe->recv.wrid = srq->wq.pidx; 1394 wqe->recv.r2[0] = 0; 1395 wqe->recv.r2[1] = 0; 1396 wqe->recv.r2[2] = 0; 1397 wqe->recv.len16 = len16; 1398 1399 if (srq->wq.ooo_count || 1400 srq->wq.pending_in_use || 1401 srq->wq.sw_rq[srq->wq.pidx].valid) { 1402 defer_srq_wr(&srq->wq, wqe, wr->wr_id, len16); 1403 } else { 1404 srq->wq.sw_rq[srq->wq.pidx].wr_id = wr->wr_id; 1405 srq->wq.sw_rq[srq->wq.pidx].valid = 1; 1406 c4iw_copy_wr_to_srq(&srq->wq, wqe, len16); 1407 pr_debug("%s cidx %u pidx %u wq_pidx %u in_use %u wr_id 0x%llx\n", 1408 __func__, srq->wq.cidx, 1409 srq->wq.pidx, srq->wq.wq_pidx, 1410 srq->wq.in_use, 1411 (unsigned long long)wr->wr_id); 1412 t4_srq_produce(&srq->wq, len16); 1413 idx += DIV_ROUND_UP(len16 * 16, T4_EQ_ENTRY_SIZE); 1414 } 1415 wr = wr->next; 1416 num_wrs--; 1417 } 1418 if (idx) 1419 t4_ring_srq_db(&srq->wq, idx, len16, wqe); 1420 spin_unlock_irqrestore(&srq->lock, flag); 1421 return err; 1422 } 1423 1424 static inline void build_term_codes(struct t4_cqe *err_cqe, u8 *layer_type, 1425 u8 *ecode) 1426 { 1427 int status; 1428 int tagged; 1429 int opcode; 1430 int rqtype; 1431 int send_inv; 1432 1433 if (!err_cqe) { 1434 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA; 1435 *ecode = 0; 1436 return; 1437 } 1438 1439 status = CQE_STATUS(err_cqe); 1440 opcode = CQE_OPCODE(err_cqe); 1441 rqtype = RQ_TYPE(err_cqe); 1442 send_inv = (opcode == FW_RI_SEND_WITH_INV) || 1443 (opcode == FW_RI_SEND_WITH_SE_INV); 1444 tagged = (opcode == FW_RI_RDMA_WRITE) || 1445 (rqtype && (opcode == FW_RI_READ_RESP)); 1446 1447 switch (status) { 1448 case T4_ERR_STAG: 1449 if (send_inv) { 1450 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 1451 *ecode = RDMAP_CANT_INV_STAG; 1452 } else { 1453 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1454 *ecode = RDMAP_INV_STAG; 1455 } 1456 break; 1457 case T4_ERR_PDID: 1458 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1459 if ((opcode == FW_RI_SEND_WITH_INV) || 1460 (opcode == FW_RI_SEND_WITH_SE_INV)) 1461 *ecode = RDMAP_CANT_INV_STAG; 1462 else 1463 *ecode = RDMAP_STAG_NOT_ASSOC; 1464 break; 1465 case T4_ERR_QPID: 1466 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1467 *ecode = RDMAP_STAG_NOT_ASSOC; 1468 break; 1469 case T4_ERR_ACCESS: 1470 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1471 *ecode = RDMAP_ACC_VIOL; 1472 break; 1473 case T4_ERR_WRAP: 1474 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1475 *ecode = RDMAP_TO_WRAP; 1476 break; 1477 case T4_ERR_BOUND: 1478 if (tagged) { 1479 *layer_type = LAYER_DDP|DDP_TAGGED_ERR; 1480 *ecode = DDPT_BASE_BOUNDS; 1481 } else { 1482 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1483 *ecode = RDMAP_BASE_BOUNDS; 1484 } 1485 break; 1486 case T4_ERR_INVALIDATE_SHARED_MR: 1487 case T4_ERR_INVALIDATE_MR_WITH_MW_BOUND: 1488 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 1489 *ecode = RDMAP_CANT_INV_STAG; 1490 break; 1491 case T4_ERR_ECC: 1492 case T4_ERR_ECC_PSTAG: 1493 case T4_ERR_INTERNAL_ERR: 1494 *layer_type = LAYER_RDMAP|RDMAP_LOCAL_CATA; 1495 *ecode = 0; 1496 break; 1497 case T4_ERR_OUT_OF_RQE: 1498 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1499 *ecode = DDPU_INV_MSN_NOBUF; 1500 break; 1501 case T4_ERR_PBL_ADDR_BOUND: 1502 *layer_type = LAYER_DDP|DDP_TAGGED_ERR; 1503 *ecode = DDPT_BASE_BOUNDS; 1504 break; 1505 case T4_ERR_CRC: 1506 *layer_type = LAYER_MPA|DDP_LLP; 1507 *ecode = MPA_CRC_ERR; 1508 break; 1509 case T4_ERR_MARKER: 1510 *layer_type = LAYER_MPA|DDP_LLP; 1511 *ecode = MPA_MARKER_ERR; 1512 break; 1513 case T4_ERR_PDU_LEN_ERR: 1514 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1515 *ecode = DDPU_MSG_TOOBIG; 1516 break; 1517 case T4_ERR_DDP_VERSION: 1518 if (tagged) { 1519 *layer_type = LAYER_DDP|DDP_TAGGED_ERR; 1520 *ecode = DDPT_INV_VERS; 1521 } else { 1522 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1523 *ecode = DDPU_INV_VERS; 1524 } 1525 break; 1526 case T4_ERR_RDMA_VERSION: 1527 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 1528 *ecode = RDMAP_INV_VERS; 1529 break; 1530 case T4_ERR_OPCODE: 1531 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 1532 *ecode = RDMAP_INV_OPCODE; 1533 break; 1534 case T4_ERR_DDP_QUEUE_NUM: 1535 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1536 *ecode = DDPU_INV_QN; 1537 break; 1538 case T4_ERR_MSN: 1539 case T4_ERR_MSN_GAP: 1540 case T4_ERR_MSN_RANGE: 1541 case T4_ERR_IRD_OVERFLOW: 1542 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1543 *ecode = DDPU_INV_MSN_RANGE; 1544 break; 1545 case T4_ERR_TBIT: 1546 *layer_type = LAYER_DDP|DDP_LOCAL_CATA; 1547 *ecode = 0; 1548 break; 1549 case T4_ERR_MO: 1550 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1551 *ecode = DDPU_INV_MO; 1552 break; 1553 default: 1554 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA; 1555 *ecode = 0; 1556 break; 1557 } 1558 } 1559 1560 static void post_terminate(struct c4iw_qp *qhp, struct t4_cqe *err_cqe, 1561 gfp_t gfp) 1562 { 1563 struct fw_ri_wr *wqe; 1564 struct sk_buff *skb; 1565 struct terminate_message *term; 1566 1567 pr_debug("qhp %p qid 0x%x tid %u\n", qhp, qhp->wq.sq.qid, 1568 qhp->ep->hwtid); 1569 1570 skb = skb_dequeue(&qhp->ep->com.ep_skb_list); 1571 if (WARN_ON(!skb)) 1572 return; 1573 1574 set_wr_txq(skb, CPL_PRIORITY_DATA, qhp->ep->txq_idx); 1575 1576 wqe = __skb_put_zero(skb, sizeof(*wqe)); 1577 wqe->op_compl = cpu_to_be32(FW_WR_OP_V(FW_RI_INIT_WR)); 1578 wqe->flowid_len16 = cpu_to_be32( 1579 FW_WR_FLOWID_V(qhp->ep->hwtid) | 1580 FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*wqe), 16))); 1581 1582 wqe->u.terminate.type = FW_RI_TYPE_TERMINATE; 1583 wqe->u.terminate.immdlen = cpu_to_be32(sizeof(*term)); 1584 term = (struct terminate_message *)wqe->u.terminate.termmsg; 1585 if (qhp->attr.layer_etype == (LAYER_MPA|DDP_LLP)) { 1586 term->layer_etype = qhp->attr.layer_etype; 1587 term->ecode = qhp->attr.ecode; 1588 } else 1589 build_term_codes(err_cqe, &term->layer_etype, &term->ecode); 1590 c4iw_ofld_send(&qhp->rhp->rdev, skb); 1591 } 1592 1593 /* 1594 * Assumes qhp lock is held. 1595 */ 1596 static void __flush_qp(struct c4iw_qp *qhp, struct c4iw_cq *rchp, 1597 struct c4iw_cq *schp) 1598 { 1599 int count; 1600 int rq_flushed = 0, sq_flushed; 1601 unsigned long flag; 1602 1603 pr_debug("qhp %p rchp %p schp %p\n", qhp, rchp, schp); 1604 1605 /* locking hierarchy: cqs lock first, then qp lock. */ 1606 spin_lock_irqsave(&rchp->lock, flag); 1607 if (schp != rchp) 1608 spin_lock(&schp->lock); 1609 spin_lock(&qhp->lock); 1610 1611 if (qhp->wq.flushed) { 1612 spin_unlock(&qhp->lock); 1613 if (schp != rchp) 1614 spin_unlock(&schp->lock); 1615 spin_unlock_irqrestore(&rchp->lock, flag); 1616 return; 1617 } 1618 qhp->wq.flushed = 1; 1619 t4_set_wq_in_error(&qhp->wq, 0); 1620 1621 c4iw_flush_hw_cq(rchp, qhp); 1622 if (!qhp->srq) { 1623 c4iw_count_rcqes(&rchp->cq, &qhp->wq, &count); 1624 rq_flushed = c4iw_flush_rq(&qhp->wq, &rchp->cq, count); 1625 } 1626 1627 if (schp != rchp) 1628 c4iw_flush_hw_cq(schp, qhp); 1629 sq_flushed = c4iw_flush_sq(qhp); 1630 1631 spin_unlock(&qhp->lock); 1632 if (schp != rchp) 1633 spin_unlock(&schp->lock); 1634 spin_unlock_irqrestore(&rchp->lock, flag); 1635 1636 if (schp == rchp) { 1637 if ((rq_flushed || sq_flushed) && 1638 t4_clear_cq_armed(&rchp->cq)) { 1639 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 1640 (*rchp->ibcq.comp_handler)(&rchp->ibcq, 1641 rchp->ibcq.cq_context); 1642 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 1643 } 1644 } else { 1645 if (rq_flushed && t4_clear_cq_armed(&rchp->cq)) { 1646 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 1647 (*rchp->ibcq.comp_handler)(&rchp->ibcq, 1648 rchp->ibcq.cq_context); 1649 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 1650 } 1651 if (sq_flushed && t4_clear_cq_armed(&schp->cq)) { 1652 spin_lock_irqsave(&schp->comp_handler_lock, flag); 1653 (*schp->ibcq.comp_handler)(&schp->ibcq, 1654 schp->ibcq.cq_context); 1655 spin_unlock_irqrestore(&schp->comp_handler_lock, flag); 1656 } 1657 } 1658 } 1659 1660 static void flush_qp(struct c4iw_qp *qhp) 1661 { 1662 struct c4iw_cq *rchp, *schp; 1663 unsigned long flag; 1664 1665 rchp = to_c4iw_cq(qhp->ibqp.recv_cq); 1666 schp = to_c4iw_cq(qhp->ibqp.send_cq); 1667 1668 if (qhp->ibqp.uobject) { 1669 1670 /* for user qps, qhp->wq.flushed is protected by qhp->mutex */ 1671 if (qhp->wq.flushed) 1672 return; 1673 1674 qhp->wq.flushed = 1; 1675 t4_set_wq_in_error(&qhp->wq, 0); 1676 t4_set_cq_in_error(&rchp->cq); 1677 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 1678 (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context); 1679 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 1680 if (schp != rchp) { 1681 t4_set_cq_in_error(&schp->cq); 1682 spin_lock_irqsave(&schp->comp_handler_lock, flag); 1683 (*schp->ibcq.comp_handler)(&schp->ibcq, 1684 schp->ibcq.cq_context); 1685 spin_unlock_irqrestore(&schp->comp_handler_lock, flag); 1686 } 1687 return; 1688 } 1689 __flush_qp(qhp, rchp, schp); 1690 } 1691 1692 static int rdma_fini(struct c4iw_dev *rhp, struct c4iw_qp *qhp, 1693 struct c4iw_ep *ep) 1694 { 1695 struct fw_ri_wr *wqe; 1696 int ret; 1697 struct sk_buff *skb; 1698 1699 pr_debug("qhp %p qid 0x%x tid %u\n", qhp, qhp->wq.sq.qid, ep->hwtid); 1700 1701 skb = skb_dequeue(&ep->com.ep_skb_list); 1702 if (WARN_ON(!skb)) 1703 return -ENOMEM; 1704 1705 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); 1706 1707 wqe = __skb_put_zero(skb, sizeof(*wqe)); 1708 wqe->op_compl = cpu_to_be32( 1709 FW_WR_OP_V(FW_RI_INIT_WR) | 1710 FW_WR_COMPL_F); 1711 wqe->flowid_len16 = cpu_to_be32( 1712 FW_WR_FLOWID_V(ep->hwtid) | 1713 FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*wqe), 16))); 1714 wqe->cookie = (uintptr_t)ep->com.wr_waitp; 1715 1716 wqe->u.fini.type = FW_RI_TYPE_FINI; 1717 1718 ret = c4iw_ref_send_wait(&rhp->rdev, skb, ep->com.wr_waitp, 1719 qhp->ep->hwtid, qhp->wq.sq.qid, __func__); 1720 1721 pr_debug("ret %d\n", ret); 1722 return ret; 1723 } 1724 1725 static void build_rtr_msg(u8 p2p_type, struct fw_ri_init *init) 1726 { 1727 pr_debug("p2p_type = %d\n", p2p_type); 1728 memset(&init->u, 0, sizeof(init->u)); 1729 switch (p2p_type) { 1730 case FW_RI_INIT_P2PTYPE_RDMA_WRITE: 1731 init->u.write.opcode = FW_RI_RDMA_WRITE_WR; 1732 init->u.write.stag_sink = cpu_to_be32(1); 1733 init->u.write.to_sink = cpu_to_be64(1); 1734 init->u.write.u.immd_src[0].op = FW_RI_DATA_IMMD; 1735 init->u.write.len16 = DIV_ROUND_UP( 1736 sizeof(init->u.write) + sizeof(struct fw_ri_immd), 16); 1737 break; 1738 case FW_RI_INIT_P2PTYPE_READ_REQ: 1739 init->u.write.opcode = FW_RI_RDMA_READ_WR; 1740 init->u.read.stag_src = cpu_to_be32(1); 1741 init->u.read.to_src_lo = cpu_to_be32(1); 1742 init->u.read.stag_sink = cpu_to_be32(1); 1743 init->u.read.to_sink_lo = cpu_to_be32(1); 1744 init->u.read.len16 = DIV_ROUND_UP(sizeof(init->u.read), 16); 1745 break; 1746 } 1747 } 1748 1749 static int rdma_init(struct c4iw_dev *rhp, struct c4iw_qp *qhp) 1750 { 1751 struct fw_ri_wr *wqe; 1752 int ret; 1753 struct sk_buff *skb; 1754 1755 pr_debug("qhp %p qid 0x%x tid %u ird %u ord %u\n", qhp, 1756 qhp->wq.sq.qid, qhp->ep->hwtid, qhp->ep->ird, qhp->ep->ord); 1757 1758 skb = alloc_skb(sizeof(*wqe), GFP_KERNEL); 1759 if (!skb) { 1760 ret = -ENOMEM; 1761 goto out; 1762 } 1763 ret = alloc_ird(rhp, qhp->attr.max_ird); 1764 if (ret) { 1765 qhp->attr.max_ird = 0; 1766 kfree_skb(skb); 1767 goto out; 1768 } 1769 set_wr_txq(skb, CPL_PRIORITY_DATA, qhp->ep->txq_idx); 1770 1771 wqe = __skb_put_zero(skb, sizeof(*wqe)); 1772 wqe->op_compl = cpu_to_be32( 1773 FW_WR_OP_V(FW_RI_INIT_WR) | 1774 FW_WR_COMPL_F); 1775 wqe->flowid_len16 = cpu_to_be32( 1776 FW_WR_FLOWID_V(qhp->ep->hwtid) | 1777 FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*wqe), 16))); 1778 1779 wqe->cookie = (uintptr_t)qhp->ep->com.wr_waitp; 1780 1781 wqe->u.init.type = FW_RI_TYPE_INIT; 1782 wqe->u.init.mpareqbit_p2ptype = 1783 FW_RI_WR_MPAREQBIT_V(qhp->attr.mpa_attr.initiator) | 1784 FW_RI_WR_P2PTYPE_V(qhp->attr.mpa_attr.p2p_type); 1785 wqe->u.init.mpa_attrs = FW_RI_MPA_IETF_ENABLE; 1786 if (qhp->attr.mpa_attr.recv_marker_enabled) 1787 wqe->u.init.mpa_attrs |= FW_RI_MPA_RX_MARKER_ENABLE; 1788 if (qhp->attr.mpa_attr.xmit_marker_enabled) 1789 wqe->u.init.mpa_attrs |= FW_RI_MPA_TX_MARKER_ENABLE; 1790 if (qhp->attr.mpa_attr.crc_enabled) 1791 wqe->u.init.mpa_attrs |= FW_RI_MPA_CRC_ENABLE; 1792 1793 wqe->u.init.qp_caps = FW_RI_QP_RDMA_READ_ENABLE | 1794 FW_RI_QP_RDMA_WRITE_ENABLE | 1795 FW_RI_QP_BIND_ENABLE; 1796 if (!qhp->ibqp.uobject) 1797 wqe->u.init.qp_caps |= FW_RI_QP_FAST_REGISTER_ENABLE | 1798 FW_RI_QP_STAG0_ENABLE; 1799 wqe->u.init.nrqe = cpu_to_be16(t4_rqes_posted(&qhp->wq)); 1800 wqe->u.init.pdid = cpu_to_be32(qhp->attr.pd); 1801 wqe->u.init.qpid = cpu_to_be32(qhp->wq.sq.qid); 1802 wqe->u.init.sq_eqid = cpu_to_be32(qhp->wq.sq.qid); 1803 if (qhp->srq) { 1804 wqe->u.init.rq_eqid = cpu_to_be32(FW_RI_INIT_RQEQID_SRQ | 1805 qhp->srq->idx); 1806 } else { 1807 wqe->u.init.rq_eqid = cpu_to_be32(qhp->wq.rq.qid); 1808 wqe->u.init.hwrqsize = cpu_to_be32(qhp->wq.rq.rqt_size); 1809 wqe->u.init.hwrqaddr = cpu_to_be32(qhp->wq.rq.rqt_hwaddr - 1810 rhp->rdev.lldi.vr->rq.start); 1811 } 1812 wqe->u.init.scqid = cpu_to_be32(qhp->attr.scq); 1813 wqe->u.init.rcqid = cpu_to_be32(qhp->attr.rcq); 1814 wqe->u.init.ord_max = cpu_to_be32(qhp->attr.max_ord); 1815 wqe->u.init.ird_max = cpu_to_be32(qhp->attr.max_ird); 1816 wqe->u.init.iss = cpu_to_be32(qhp->ep->snd_seq); 1817 wqe->u.init.irs = cpu_to_be32(qhp->ep->rcv_seq); 1818 if (qhp->attr.mpa_attr.initiator) 1819 build_rtr_msg(qhp->attr.mpa_attr.p2p_type, &wqe->u.init); 1820 1821 ret = c4iw_ref_send_wait(&rhp->rdev, skb, qhp->ep->com.wr_waitp, 1822 qhp->ep->hwtid, qhp->wq.sq.qid, __func__); 1823 if (!ret) 1824 goto out; 1825 1826 free_ird(rhp, qhp->attr.max_ird); 1827 out: 1828 pr_debug("ret %d\n", ret); 1829 return ret; 1830 } 1831 1832 int c4iw_modify_qp(struct c4iw_dev *rhp, struct c4iw_qp *qhp, 1833 enum c4iw_qp_attr_mask mask, 1834 struct c4iw_qp_attributes *attrs, 1835 int internal) 1836 { 1837 int ret = 0; 1838 struct c4iw_qp_attributes newattr = qhp->attr; 1839 int disconnect = 0; 1840 int terminate = 0; 1841 int abort = 0; 1842 int free = 0; 1843 struct c4iw_ep *ep = NULL; 1844 1845 pr_debug("qhp %p sqid 0x%x rqid 0x%x ep %p state %d -> %d\n", 1846 qhp, qhp->wq.sq.qid, qhp->wq.rq.qid, qhp->ep, qhp->attr.state, 1847 (mask & C4IW_QP_ATTR_NEXT_STATE) ? attrs->next_state : -1); 1848 1849 mutex_lock(&qhp->mutex); 1850 1851 /* Process attr changes if in IDLE */ 1852 if (mask & C4IW_QP_ATTR_VALID_MODIFY) { 1853 if (qhp->attr.state != C4IW_QP_STATE_IDLE) { 1854 ret = -EIO; 1855 goto out; 1856 } 1857 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_READ) 1858 newattr.enable_rdma_read = attrs->enable_rdma_read; 1859 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_WRITE) 1860 newattr.enable_rdma_write = attrs->enable_rdma_write; 1861 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_BIND) 1862 newattr.enable_bind = attrs->enable_bind; 1863 if (mask & C4IW_QP_ATTR_MAX_ORD) { 1864 if (attrs->max_ord > c4iw_max_read_depth) { 1865 ret = -EINVAL; 1866 goto out; 1867 } 1868 newattr.max_ord = attrs->max_ord; 1869 } 1870 if (mask & C4IW_QP_ATTR_MAX_IRD) { 1871 if (attrs->max_ird > cur_max_read_depth(rhp)) { 1872 ret = -EINVAL; 1873 goto out; 1874 } 1875 newattr.max_ird = attrs->max_ird; 1876 } 1877 qhp->attr = newattr; 1878 } 1879 1880 if (mask & C4IW_QP_ATTR_SQ_DB) { 1881 ret = ring_kernel_sq_db(qhp, attrs->sq_db_inc); 1882 goto out; 1883 } 1884 if (mask & C4IW_QP_ATTR_RQ_DB) { 1885 ret = ring_kernel_rq_db(qhp, attrs->rq_db_inc); 1886 goto out; 1887 } 1888 1889 if (!(mask & C4IW_QP_ATTR_NEXT_STATE)) 1890 goto out; 1891 if (qhp->attr.state == attrs->next_state) 1892 goto out; 1893 1894 switch (qhp->attr.state) { 1895 case C4IW_QP_STATE_IDLE: 1896 switch (attrs->next_state) { 1897 case C4IW_QP_STATE_RTS: 1898 if (!(mask & C4IW_QP_ATTR_LLP_STREAM_HANDLE)) { 1899 ret = -EINVAL; 1900 goto out; 1901 } 1902 if (!(mask & C4IW_QP_ATTR_MPA_ATTR)) { 1903 ret = -EINVAL; 1904 goto out; 1905 } 1906 qhp->attr.mpa_attr = attrs->mpa_attr; 1907 qhp->attr.llp_stream_handle = attrs->llp_stream_handle; 1908 qhp->ep = qhp->attr.llp_stream_handle; 1909 set_state(qhp, C4IW_QP_STATE_RTS); 1910 1911 /* 1912 * Ref the endpoint here and deref when we 1913 * disassociate the endpoint from the QP. This 1914 * happens in CLOSING->IDLE transition or *->ERROR 1915 * transition. 1916 */ 1917 c4iw_get_ep(&qhp->ep->com); 1918 ret = rdma_init(rhp, qhp); 1919 if (ret) 1920 goto err; 1921 break; 1922 case C4IW_QP_STATE_ERROR: 1923 set_state(qhp, C4IW_QP_STATE_ERROR); 1924 flush_qp(qhp); 1925 break; 1926 default: 1927 ret = -EINVAL; 1928 goto out; 1929 } 1930 break; 1931 case C4IW_QP_STATE_RTS: 1932 switch (attrs->next_state) { 1933 case C4IW_QP_STATE_CLOSING: 1934 t4_set_wq_in_error(&qhp->wq, 0); 1935 set_state(qhp, C4IW_QP_STATE_CLOSING); 1936 ep = qhp->ep; 1937 if (!internal) { 1938 abort = 0; 1939 disconnect = 1; 1940 c4iw_get_ep(&qhp->ep->com); 1941 } 1942 ret = rdma_fini(rhp, qhp, ep); 1943 if (ret) 1944 goto err; 1945 break; 1946 case C4IW_QP_STATE_TERMINATE: 1947 t4_set_wq_in_error(&qhp->wq, 0); 1948 set_state(qhp, C4IW_QP_STATE_TERMINATE); 1949 qhp->attr.layer_etype = attrs->layer_etype; 1950 qhp->attr.ecode = attrs->ecode; 1951 ep = qhp->ep; 1952 if (!internal) { 1953 c4iw_get_ep(&ep->com); 1954 terminate = 1; 1955 disconnect = 1; 1956 } else { 1957 terminate = qhp->attr.send_term; 1958 ret = rdma_fini(rhp, qhp, ep); 1959 if (ret) 1960 goto err; 1961 } 1962 break; 1963 case C4IW_QP_STATE_ERROR: 1964 t4_set_wq_in_error(&qhp->wq, 0); 1965 set_state(qhp, C4IW_QP_STATE_ERROR); 1966 if (!internal) { 1967 disconnect = 1; 1968 ep = qhp->ep; 1969 c4iw_get_ep(&qhp->ep->com); 1970 } 1971 goto err; 1972 break; 1973 default: 1974 ret = -EINVAL; 1975 goto out; 1976 } 1977 break; 1978 case C4IW_QP_STATE_CLOSING: 1979 1980 /* 1981 * Allow kernel users to move to ERROR for qp draining. 1982 */ 1983 if (!internal && (qhp->ibqp.uobject || attrs->next_state != 1984 C4IW_QP_STATE_ERROR)) { 1985 ret = -EINVAL; 1986 goto out; 1987 } 1988 switch (attrs->next_state) { 1989 case C4IW_QP_STATE_IDLE: 1990 flush_qp(qhp); 1991 set_state(qhp, C4IW_QP_STATE_IDLE); 1992 qhp->attr.llp_stream_handle = NULL; 1993 c4iw_put_ep(&qhp->ep->com); 1994 qhp->ep = NULL; 1995 wake_up(&qhp->wait); 1996 break; 1997 case C4IW_QP_STATE_ERROR: 1998 goto err; 1999 default: 2000 ret = -EINVAL; 2001 goto err; 2002 } 2003 break; 2004 case C4IW_QP_STATE_ERROR: 2005 if (attrs->next_state != C4IW_QP_STATE_IDLE) { 2006 ret = -EINVAL; 2007 goto out; 2008 } 2009 if (!t4_sq_empty(&qhp->wq) || !t4_rq_empty(&qhp->wq)) { 2010 ret = -EINVAL; 2011 goto out; 2012 } 2013 set_state(qhp, C4IW_QP_STATE_IDLE); 2014 break; 2015 case C4IW_QP_STATE_TERMINATE: 2016 if (!internal) { 2017 ret = -EINVAL; 2018 goto out; 2019 } 2020 goto err; 2021 break; 2022 default: 2023 pr_err("%s in a bad state %d\n", __func__, qhp->attr.state); 2024 ret = -EINVAL; 2025 goto err; 2026 break; 2027 } 2028 goto out; 2029 err: 2030 pr_debug("disassociating ep %p qpid 0x%x\n", qhp->ep, 2031 qhp->wq.sq.qid); 2032 2033 /* disassociate the LLP connection */ 2034 qhp->attr.llp_stream_handle = NULL; 2035 if (!ep) 2036 ep = qhp->ep; 2037 qhp->ep = NULL; 2038 set_state(qhp, C4IW_QP_STATE_ERROR); 2039 free = 1; 2040 abort = 1; 2041 flush_qp(qhp); 2042 wake_up(&qhp->wait); 2043 out: 2044 mutex_unlock(&qhp->mutex); 2045 2046 if (terminate) 2047 post_terminate(qhp, NULL, internal ? GFP_ATOMIC : GFP_KERNEL); 2048 2049 /* 2050 * If disconnect is 1, then we need to initiate a disconnect 2051 * on the EP. This can be a normal close (RTS->CLOSING) or 2052 * an abnormal close (RTS/CLOSING->ERROR). 2053 */ 2054 if (disconnect) { 2055 c4iw_ep_disconnect(ep, abort, internal ? GFP_ATOMIC : 2056 GFP_KERNEL); 2057 c4iw_put_ep(&ep->com); 2058 } 2059 2060 /* 2061 * If free is 1, then we've disassociated the EP from the QP 2062 * and we need to dereference the EP. 2063 */ 2064 if (free) 2065 c4iw_put_ep(&ep->com); 2066 pr_debug("exit state %d\n", qhp->attr.state); 2067 return ret; 2068 } 2069 2070 int c4iw_destroy_qp(struct ib_qp *ib_qp, struct ib_udata *udata) 2071 { 2072 struct c4iw_dev *rhp; 2073 struct c4iw_qp *qhp; 2074 struct c4iw_ucontext *ucontext; 2075 struct c4iw_qp_attributes attrs; 2076 2077 qhp = to_c4iw_qp(ib_qp); 2078 rhp = qhp->rhp; 2079 ucontext = qhp->ucontext; 2080 2081 attrs.next_state = C4IW_QP_STATE_ERROR; 2082 if (qhp->attr.state == C4IW_QP_STATE_TERMINATE) 2083 c4iw_modify_qp(rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 2084 else 2085 c4iw_modify_qp(rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 0); 2086 wait_event(qhp->wait, !qhp->ep); 2087 2088 xa_lock_irq(&rhp->qps); 2089 __xa_erase(&rhp->qps, qhp->wq.sq.qid); 2090 if (!list_empty(&qhp->db_fc_entry)) 2091 list_del_init(&qhp->db_fc_entry); 2092 xa_unlock_irq(&rhp->qps); 2093 free_ird(rhp, qhp->attr.max_ird); 2094 2095 c4iw_qp_rem_ref(ib_qp); 2096 2097 wait_for_completion(&qhp->qp_rel_comp); 2098 2099 pr_debug("ib_qp %p qpid 0x%0x\n", ib_qp, qhp->wq.sq.qid); 2100 pr_debug("qhp %p ucontext %p\n", qhp, ucontext); 2101 2102 destroy_qp(&rhp->rdev, &qhp->wq, 2103 ucontext ? &ucontext->uctx : &rhp->rdev.uctx, !qhp->srq); 2104 2105 c4iw_put_wr_wait(qhp->wr_waitp); 2106 return 0; 2107 } 2108 2109 int c4iw_create_qp(struct ib_qp *qp, struct ib_qp_init_attr *attrs, 2110 struct ib_udata *udata) 2111 { 2112 struct ib_pd *pd = qp->pd; 2113 struct c4iw_dev *rhp; 2114 struct c4iw_qp *qhp = to_c4iw_qp(qp); 2115 struct c4iw_pd *php; 2116 struct c4iw_cq *schp; 2117 struct c4iw_cq *rchp; 2118 struct c4iw_create_qp_resp uresp; 2119 unsigned int sqsize, rqsize = 0; 2120 struct c4iw_ucontext *ucontext = rdma_udata_to_drv_context( 2121 udata, struct c4iw_ucontext, ibucontext); 2122 int ret; 2123 struct c4iw_mm_entry *sq_key_mm, *rq_key_mm = NULL, *sq_db_key_mm; 2124 struct c4iw_mm_entry *rq_db_key_mm = NULL, *ma_sync_key_mm = NULL; 2125 2126 if (attrs->qp_type != IB_QPT_RC || attrs->create_flags) 2127 return -EOPNOTSUPP; 2128 2129 php = to_c4iw_pd(pd); 2130 rhp = php->rhp; 2131 schp = get_chp(rhp, ((struct c4iw_cq *)attrs->send_cq)->cq.cqid); 2132 rchp = get_chp(rhp, ((struct c4iw_cq *)attrs->recv_cq)->cq.cqid); 2133 if (!schp || !rchp) 2134 return -EINVAL; 2135 2136 if (attrs->cap.max_inline_data > T4_MAX_SEND_INLINE) 2137 return -EINVAL; 2138 2139 if (!attrs->srq) { 2140 if (attrs->cap.max_recv_wr > rhp->rdev.hw_queue.t4_max_rq_size) 2141 return -E2BIG; 2142 rqsize = attrs->cap.max_recv_wr + 1; 2143 if (rqsize < 8) 2144 rqsize = 8; 2145 } 2146 2147 if (attrs->cap.max_send_wr > rhp->rdev.hw_queue.t4_max_sq_size) 2148 return -E2BIG; 2149 sqsize = attrs->cap.max_send_wr + 1; 2150 if (sqsize < 8) 2151 sqsize = 8; 2152 2153 qhp->wr_waitp = c4iw_alloc_wr_wait(GFP_KERNEL); 2154 if (!qhp->wr_waitp) 2155 return -ENOMEM; 2156 2157 qhp->wq.sq.size = sqsize; 2158 qhp->wq.sq.memsize = 2159 (sqsize + rhp->rdev.hw_queue.t4_eq_status_entries) * 2160 sizeof(*qhp->wq.sq.queue) + 16 * sizeof(__be64); 2161 qhp->wq.sq.flush_cidx = -1; 2162 if (!attrs->srq) { 2163 qhp->wq.rq.size = rqsize; 2164 qhp->wq.rq.memsize = 2165 (rqsize + rhp->rdev.hw_queue.t4_eq_status_entries) * 2166 sizeof(*qhp->wq.rq.queue); 2167 } 2168 2169 if (ucontext) { 2170 qhp->wq.sq.memsize = roundup(qhp->wq.sq.memsize, PAGE_SIZE); 2171 if (!attrs->srq) 2172 qhp->wq.rq.memsize = 2173 roundup(qhp->wq.rq.memsize, PAGE_SIZE); 2174 } 2175 2176 ret = create_qp(&rhp->rdev, &qhp->wq, &schp->cq, &rchp->cq, 2177 ucontext ? &ucontext->uctx : &rhp->rdev.uctx, 2178 qhp->wr_waitp, !attrs->srq); 2179 if (ret) 2180 goto err_free_wr_wait; 2181 2182 attrs->cap.max_recv_wr = rqsize - 1; 2183 attrs->cap.max_send_wr = sqsize - 1; 2184 attrs->cap.max_inline_data = T4_MAX_SEND_INLINE; 2185 2186 qhp->rhp = rhp; 2187 qhp->attr.pd = php->pdid; 2188 qhp->attr.scq = ((struct c4iw_cq *) attrs->send_cq)->cq.cqid; 2189 qhp->attr.rcq = ((struct c4iw_cq *) attrs->recv_cq)->cq.cqid; 2190 qhp->attr.sq_num_entries = attrs->cap.max_send_wr; 2191 qhp->attr.sq_max_sges = attrs->cap.max_send_sge; 2192 qhp->attr.sq_max_sges_rdma_write = attrs->cap.max_send_sge; 2193 if (!attrs->srq) { 2194 qhp->attr.rq_num_entries = attrs->cap.max_recv_wr; 2195 qhp->attr.rq_max_sges = attrs->cap.max_recv_sge; 2196 } 2197 qhp->attr.state = C4IW_QP_STATE_IDLE; 2198 qhp->attr.next_state = C4IW_QP_STATE_IDLE; 2199 qhp->attr.enable_rdma_read = 1; 2200 qhp->attr.enable_rdma_write = 1; 2201 qhp->attr.enable_bind = 1; 2202 qhp->attr.max_ord = 0; 2203 qhp->attr.max_ird = 0; 2204 qhp->sq_sig_all = attrs->sq_sig_type == IB_SIGNAL_ALL_WR; 2205 spin_lock_init(&qhp->lock); 2206 mutex_init(&qhp->mutex); 2207 init_waitqueue_head(&qhp->wait); 2208 init_completion(&qhp->qp_rel_comp); 2209 refcount_set(&qhp->qp_refcnt, 1); 2210 2211 ret = xa_insert_irq(&rhp->qps, qhp->wq.sq.qid, qhp, GFP_KERNEL); 2212 if (ret) 2213 goto err_destroy_qp; 2214 2215 if (udata && ucontext) { 2216 sq_key_mm = kmalloc(sizeof(*sq_key_mm), GFP_KERNEL); 2217 if (!sq_key_mm) { 2218 ret = -ENOMEM; 2219 goto err_remove_handle; 2220 } 2221 if (!attrs->srq) { 2222 rq_key_mm = kmalloc(sizeof(*rq_key_mm), GFP_KERNEL); 2223 if (!rq_key_mm) { 2224 ret = -ENOMEM; 2225 goto err_free_sq_key; 2226 } 2227 } 2228 sq_db_key_mm = kmalloc(sizeof(*sq_db_key_mm), GFP_KERNEL); 2229 if (!sq_db_key_mm) { 2230 ret = -ENOMEM; 2231 goto err_free_rq_key; 2232 } 2233 if (!attrs->srq) { 2234 rq_db_key_mm = 2235 kmalloc(sizeof(*rq_db_key_mm), GFP_KERNEL); 2236 if (!rq_db_key_mm) { 2237 ret = -ENOMEM; 2238 goto err_free_sq_db_key; 2239 } 2240 } 2241 memset(&uresp, 0, sizeof(uresp)); 2242 if (t4_sq_onchip(&qhp->wq.sq)) { 2243 ma_sync_key_mm = kmalloc(sizeof(*ma_sync_key_mm), 2244 GFP_KERNEL); 2245 if (!ma_sync_key_mm) { 2246 ret = -ENOMEM; 2247 goto err_free_rq_db_key; 2248 } 2249 uresp.flags = C4IW_QPF_ONCHIP; 2250 } 2251 if (rhp->rdev.lldi.write_w_imm_support) 2252 uresp.flags |= C4IW_QPF_WRITE_W_IMM; 2253 uresp.qid_mask = rhp->rdev.qpmask; 2254 uresp.sqid = qhp->wq.sq.qid; 2255 uresp.sq_size = qhp->wq.sq.size; 2256 uresp.sq_memsize = qhp->wq.sq.memsize; 2257 if (!attrs->srq) { 2258 uresp.rqid = qhp->wq.rq.qid; 2259 uresp.rq_size = qhp->wq.rq.size; 2260 uresp.rq_memsize = qhp->wq.rq.memsize; 2261 } 2262 spin_lock(&ucontext->mmap_lock); 2263 if (ma_sync_key_mm) { 2264 uresp.ma_sync_key = ucontext->key; 2265 ucontext->key += PAGE_SIZE; 2266 } 2267 uresp.sq_key = ucontext->key; 2268 ucontext->key += PAGE_SIZE; 2269 if (!attrs->srq) { 2270 uresp.rq_key = ucontext->key; 2271 ucontext->key += PAGE_SIZE; 2272 } 2273 uresp.sq_db_gts_key = ucontext->key; 2274 ucontext->key += PAGE_SIZE; 2275 if (!attrs->srq) { 2276 uresp.rq_db_gts_key = ucontext->key; 2277 ucontext->key += PAGE_SIZE; 2278 } 2279 spin_unlock(&ucontext->mmap_lock); 2280 ret = ib_copy_to_udata(udata, &uresp, sizeof(uresp)); 2281 if (ret) 2282 goto err_free_ma_sync_key; 2283 sq_key_mm->key = uresp.sq_key; 2284 sq_key_mm->addr = qhp->wq.sq.phys_addr; 2285 sq_key_mm->len = PAGE_ALIGN(qhp->wq.sq.memsize); 2286 insert_mmap(ucontext, sq_key_mm); 2287 if (!attrs->srq) { 2288 rq_key_mm->key = uresp.rq_key; 2289 rq_key_mm->addr = virt_to_phys(qhp->wq.rq.queue); 2290 rq_key_mm->len = PAGE_ALIGN(qhp->wq.rq.memsize); 2291 insert_mmap(ucontext, rq_key_mm); 2292 } 2293 sq_db_key_mm->key = uresp.sq_db_gts_key; 2294 sq_db_key_mm->addr = (u64)(unsigned long)qhp->wq.sq.bar2_pa; 2295 sq_db_key_mm->len = PAGE_SIZE; 2296 insert_mmap(ucontext, sq_db_key_mm); 2297 if (!attrs->srq) { 2298 rq_db_key_mm->key = uresp.rq_db_gts_key; 2299 rq_db_key_mm->addr = 2300 (u64)(unsigned long)qhp->wq.rq.bar2_pa; 2301 rq_db_key_mm->len = PAGE_SIZE; 2302 insert_mmap(ucontext, rq_db_key_mm); 2303 } 2304 if (ma_sync_key_mm) { 2305 ma_sync_key_mm->key = uresp.ma_sync_key; 2306 ma_sync_key_mm->addr = 2307 (pci_resource_start(rhp->rdev.lldi.pdev, 0) + 2308 PCIE_MA_SYNC_A) & PAGE_MASK; 2309 ma_sync_key_mm->len = PAGE_SIZE; 2310 insert_mmap(ucontext, ma_sync_key_mm); 2311 } 2312 2313 qhp->ucontext = ucontext; 2314 } 2315 if (!attrs->srq) { 2316 qhp->wq.qp_errp = 2317 &qhp->wq.rq.queue[qhp->wq.rq.size].status.qp_err; 2318 } else { 2319 qhp->wq.qp_errp = 2320 &qhp->wq.sq.queue[qhp->wq.sq.size].status.qp_err; 2321 qhp->wq.srqidxp = 2322 &qhp->wq.sq.queue[qhp->wq.sq.size].status.srqidx; 2323 } 2324 2325 qhp->ibqp.qp_num = qhp->wq.sq.qid; 2326 if (attrs->srq) 2327 qhp->srq = to_c4iw_srq(attrs->srq); 2328 INIT_LIST_HEAD(&qhp->db_fc_entry); 2329 pr_debug("sq id %u size %u memsize %zu num_entries %u rq id %u size %u memsize %zu num_entries %u\n", 2330 qhp->wq.sq.qid, qhp->wq.sq.size, qhp->wq.sq.memsize, 2331 attrs->cap.max_send_wr, qhp->wq.rq.qid, qhp->wq.rq.size, 2332 qhp->wq.rq.memsize, attrs->cap.max_recv_wr); 2333 return 0; 2334 err_free_ma_sync_key: 2335 kfree(ma_sync_key_mm); 2336 err_free_rq_db_key: 2337 if (!attrs->srq) 2338 kfree(rq_db_key_mm); 2339 err_free_sq_db_key: 2340 kfree(sq_db_key_mm); 2341 err_free_rq_key: 2342 if (!attrs->srq) 2343 kfree(rq_key_mm); 2344 err_free_sq_key: 2345 kfree(sq_key_mm); 2346 err_remove_handle: 2347 xa_erase_irq(&rhp->qps, qhp->wq.sq.qid); 2348 err_destroy_qp: 2349 destroy_qp(&rhp->rdev, &qhp->wq, 2350 ucontext ? &ucontext->uctx : &rhp->rdev.uctx, !attrs->srq); 2351 err_free_wr_wait: 2352 c4iw_put_wr_wait(qhp->wr_waitp); 2353 return ret; 2354 } 2355 2356 int c4iw_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 2357 int attr_mask, struct ib_udata *udata) 2358 { 2359 struct c4iw_dev *rhp; 2360 struct c4iw_qp *qhp; 2361 enum c4iw_qp_attr_mask mask = 0; 2362 struct c4iw_qp_attributes attrs = {}; 2363 2364 pr_debug("ib_qp %p\n", ibqp); 2365 2366 if (attr_mask & ~IB_QP_ATTR_STANDARD_BITS) 2367 return -EOPNOTSUPP; 2368 2369 /* iwarp does not support the RTR state */ 2370 if ((attr_mask & IB_QP_STATE) && (attr->qp_state == IB_QPS_RTR)) 2371 attr_mask &= ~IB_QP_STATE; 2372 2373 /* Make sure we still have something left to do */ 2374 if (!attr_mask) 2375 return 0; 2376 2377 qhp = to_c4iw_qp(ibqp); 2378 rhp = qhp->rhp; 2379 2380 attrs.next_state = c4iw_convert_state(attr->qp_state); 2381 attrs.enable_rdma_read = (attr->qp_access_flags & 2382 IB_ACCESS_REMOTE_READ) ? 1 : 0; 2383 attrs.enable_rdma_write = (attr->qp_access_flags & 2384 IB_ACCESS_REMOTE_WRITE) ? 1 : 0; 2385 attrs.enable_bind = (attr->qp_access_flags & IB_ACCESS_MW_BIND) ? 1 : 0; 2386 2387 2388 mask |= (attr_mask & IB_QP_STATE) ? C4IW_QP_ATTR_NEXT_STATE : 0; 2389 mask |= (attr_mask & IB_QP_ACCESS_FLAGS) ? 2390 (C4IW_QP_ATTR_ENABLE_RDMA_READ | 2391 C4IW_QP_ATTR_ENABLE_RDMA_WRITE | 2392 C4IW_QP_ATTR_ENABLE_RDMA_BIND) : 0; 2393 2394 /* 2395 * Use SQ_PSN and RQ_PSN to pass in IDX_INC values for 2396 * ringing the queue db when we're in DB_FULL mode. 2397 * Only allow this on T4 devices. 2398 */ 2399 attrs.sq_db_inc = attr->sq_psn; 2400 attrs.rq_db_inc = attr->rq_psn; 2401 mask |= (attr_mask & IB_QP_SQ_PSN) ? C4IW_QP_ATTR_SQ_DB : 0; 2402 mask |= (attr_mask & IB_QP_RQ_PSN) ? C4IW_QP_ATTR_RQ_DB : 0; 2403 if (!is_t4(to_c4iw_qp(ibqp)->rhp->rdev.lldi.adapter_type) && 2404 (mask & (C4IW_QP_ATTR_SQ_DB|C4IW_QP_ATTR_RQ_DB))) 2405 return -EINVAL; 2406 2407 return c4iw_modify_qp(rhp, qhp, mask, &attrs, 0); 2408 } 2409 2410 struct ib_qp *c4iw_get_qp(struct ib_device *dev, int qpn) 2411 { 2412 pr_debug("ib_dev %p qpn 0x%x\n", dev, qpn); 2413 return (struct ib_qp *)get_qhp(to_c4iw_dev(dev), qpn); 2414 } 2415 2416 void c4iw_dispatch_srq_limit_reached_event(struct c4iw_srq *srq) 2417 { 2418 struct ib_event event = {}; 2419 2420 event.device = &srq->rhp->ibdev; 2421 event.element.srq = &srq->ibsrq; 2422 event.event = IB_EVENT_SRQ_LIMIT_REACHED; 2423 ib_dispatch_event(&event); 2424 } 2425 2426 int c4iw_modify_srq(struct ib_srq *ib_srq, struct ib_srq_attr *attr, 2427 enum ib_srq_attr_mask srq_attr_mask, 2428 struct ib_udata *udata) 2429 { 2430 struct c4iw_srq *srq = to_c4iw_srq(ib_srq); 2431 int ret = 0; 2432 2433 /* 2434 * XXX 0 mask == a SW interrupt for srq_limit reached... 2435 */ 2436 if (udata && !srq_attr_mask) { 2437 c4iw_dispatch_srq_limit_reached_event(srq); 2438 goto out; 2439 } 2440 2441 /* no support for this yet */ 2442 if (srq_attr_mask & IB_SRQ_MAX_WR) { 2443 ret = -EINVAL; 2444 goto out; 2445 } 2446 2447 if (!udata && (srq_attr_mask & IB_SRQ_LIMIT)) { 2448 srq->armed = true; 2449 srq->srq_limit = attr->srq_limit; 2450 } 2451 out: 2452 return ret; 2453 } 2454 2455 int c4iw_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 2456 int attr_mask, struct ib_qp_init_attr *init_attr) 2457 { 2458 struct c4iw_qp *qhp = to_c4iw_qp(ibqp); 2459 2460 memset(attr, 0, sizeof(*attr)); 2461 memset(init_attr, 0, sizeof(*init_attr)); 2462 attr->qp_state = to_ib_qp_state(qhp->attr.state); 2463 init_attr->cap.max_send_wr = qhp->attr.sq_num_entries; 2464 init_attr->cap.max_recv_wr = qhp->attr.rq_num_entries; 2465 init_attr->cap.max_send_sge = qhp->attr.sq_max_sges; 2466 init_attr->cap.max_recv_sge = qhp->attr.rq_max_sges; 2467 init_attr->cap.max_inline_data = T4_MAX_SEND_INLINE; 2468 init_attr->sq_sig_type = qhp->sq_sig_all ? IB_SIGNAL_ALL_WR : 0; 2469 return 0; 2470 } 2471 2472 static void free_srq_queue(struct c4iw_srq *srq, struct c4iw_dev_ucontext *uctx, 2473 struct c4iw_wr_wait *wr_waitp) 2474 { 2475 struct c4iw_rdev *rdev = &srq->rhp->rdev; 2476 struct sk_buff *skb = srq->destroy_skb; 2477 struct t4_srq *wq = &srq->wq; 2478 struct fw_ri_res_wr *res_wr; 2479 struct fw_ri_res *res; 2480 int wr_len; 2481 2482 wr_len = sizeof(*res_wr) + sizeof(*res); 2483 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0); 2484 2485 res_wr = (struct fw_ri_res_wr *)__skb_put(skb, wr_len); 2486 memset(res_wr, 0, wr_len); 2487 res_wr->op_nres = cpu_to_be32(FW_WR_OP_V(FW_RI_RES_WR) | 2488 FW_RI_RES_WR_NRES_V(1) | 2489 FW_WR_COMPL_F); 2490 res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16)); 2491 res_wr->cookie = (uintptr_t)wr_waitp; 2492 res = res_wr->res; 2493 res->u.srq.restype = FW_RI_RES_TYPE_SRQ; 2494 res->u.srq.op = FW_RI_RES_OP_RESET; 2495 res->u.srq.srqid = cpu_to_be32(srq->idx); 2496 res->u.srq.eqid = cpu_to_be32(wq->qid); 2497 2498 c4iw_init_wr_wait(wr_waitp); 2499 c4iw_ref_send_wait(rdev, skb, wr_waitp, 0, 0, __func__); 2500 2501 dma_free_coherent(&rdev->lldi.pdev->dev, 2502 wq->memsize, wq->queue, 2503 dma_unmap_addr(wq, mapping)); 2504 c4iw_rqtpool_free(rdev, wq->rqt_hwaddr, wq->rqt_size); 2505 kfree(wq->sw_rq); 2506 c4iw_put_qpid(rdev, wq->qid, uctx); 2507 } 2508 2509 static int alloc_srq_queue(struct c4iw_srq *srq, struct c4iw_dev_ucontext *uctx, 2510 struct c4iw_wr_wait *wr_waitp) 2511 { 2512 struct c4iw_rdev *rdev = &srq->rhp->rdev; 2513 int user = (uctx != &rdev->uctx); 2514 struct t4_srq *wq = &srq->wq; 2515 struct fw_ri_res_wr *res_wr; 2516 struct fw_ri_res *res; 2517 struct sk_buff *skb; 2518 int wr_len; 2519 int eqsize; 2520 int ret = -ENOMEM; 2521 2522 wq->qid = c4iw_get_qpid(rdev, uctx); 2523 if (!wq->qid) 2524 goto err; 2525 2526 if (!user) { 2527 wq->sw_rq = kcalloc(wq->size, sizeof(*wq->sw_rq), 2528 GFP_KERNEL); 2529 if (!wq->sw_rq) 2530 goto err_put_qpid; 2531 wq->pending_wrs = kcalloc(srq->wq.size, 2532 sizeof(*srq->wq.pending_wrs), 2533 GFP_KERNEL); 2534 if (!wq->pending_wrs) 2535 goto err_free_sw_rq; 2536 } 2537 2538 wq->rqt_size = wq->size; 2539 wq->rqt_hwaddr = c4iw_rqtpool_alloc(rdev, wq->rqt_size); 2540 if (!wq->rqt_hwaddr) 2541 goto err_free_pending_wrs; 2542 wq->rqt_abs_idx = (wq->rqt_hwaddr - rdev->lldi.vr->rq.start) >> 2543 T4_RQT_ENTRY_SHIFT; 2544 2545 wq->queue = dma_alloc_coherent(&rdev->lldi.pdev->dev, wq->memsize, 2546 &wq->dma_addr, GFP_KERNEL); 2547 if (!wq->queue) 2548 goto err_free_rqtpool; 2549 2550 dma_unmap_addr_set(wq, mapping, wq->dma_addr); 2551 2552 wq->bar2_va = c4iw_bar2_addrs(rdev, wq->qid, CXGB4_BAR2_QTYPE_EGRESS, 2553 &wq->bar2_qid, 2554 user ? &wq->bar2_pa : NULL); 2555 2556 /* 2557 * User mode must have bar2 access. 2558 */ 2559 2560 if (user && !wq->bar2_va) { 2561 pr_warn(MOD "%s: srqid %u not in BAR2 range.\n", 2562 pci_name(rdev->lldi.pdev), wq->qid); 2563 ret = -EINVAL; 2564 goto err_free_queue; 2565 } 2566 2567 /* build fw_ri_res_wr */ 2568 wr_len = sizeof(*res_wr) + sizeof(*res); 2569 2570 skb = alloc_skb(wr_len, GFP_KERNEL); 2571 if (!skb) 2572 goto err_free_queue; 2573 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0); 2574 2575 res_wr = (struct fw_ri_res_wr *)__skb_put(skb, wr_len); 2576 memset(res_wr, 0, wr_len); 2577 res_wr->op_nres = cpu_to_be32(FW_WR_OP_V(FW_RI_RES_WR) | 2578 FW_RI_RES_WR_NRES_V(1) | 2579 FW_WR_COMPL_F); 2580 res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16)); 2581 res_wr->cookie = (uintptr_t)wr_waitp; 2582 res = res_wr->res; 2583 res->u.srq.restype = FW_RI_RES_TYPE_SRQ; 2584 res->u.srq.op = FW_RI_RES_OP_WRITE; 2585 2586 /* 2587 * eqsize is the number of 64B entries plus the status page size. 2588 */ 2589 eqsize = wq->size * T4_RQ_NUM_SLOTS + 2590 rdev->hw_queue.t4_eq_status_entries; 2591 res->u.srq.eqid = cpu_to_be32(wq->qid); 2592 res->u.srq.fetchszm_to_iqid = 2593 /* no host cidx updates */ 2594 cpu_to_be32(FW_RI_RES_WR_HOSTFCMODE_V(0) | 2595 FW_RI_RES_WR_CPRIO_V(0) | /* don't keep in chip cache */ 2596 FW_RI_RES_WR_PCIECHN_V(0) | /* set by uP at ri_init time */ 2597 FW_RI_RES_WR_FETCHRO_V(0)); /* relaxed_ordering */ 2598 res->u.srq.dcaen_to_eqsize = 2599 cpu_to_be32(FW_RI_RES_WR_DCAEN_V(0) | 2600 FW_RI_RES_WR_DCACPU_V(0) | 2601 FW_RI_RES_WR_FBMIN_V(2) | 2602 FW_RI_RES_WR_FBMAX_V(3) | 2603 FW_RI_RES_WR_CIDXFTHRESHO_V(0) | 2604 FW_RI_RES_WR_CIDXFTHRESH_V(0) | 2605 FW_RI_RES_WR_EQSIZE_V(eqsize)); 2606 res->u.srq.eqaddr = cpu_to_be64(wq->dma_addr); 2607 res->u.srq.srqid = cpu_to_be32(srq->idx); 2608 res->u.srq.pdid = cpu_to_be32(srq->pdid); 2609 res->u.srq.hwsrqsize = cpu_to_be32(wq->rqt_size); 2610 res->u.srq.hwsrqaddr = cpu_to_be32(wq->rqt_hwaddr - 2611 rdev->lldi.vr->rq.start); 2612 2613 c4iw_init_wr_wait(wr_waitp); 2614 2615 ret = c4iw_ref_send_wait(rdev, skb, wr_waitp, 0, wq->qid, __func__); 2616 if (ret) 2617 goto err_free_queue; 2618 2619 pr_debug("%s srq %u eqid %u pdid %u queue va %p pa 0x%llx\n" 2620 " bar2_addr %p rqt addr 0x%x size %d\n", 2621 __func__, srq->idx, wq->qid, srq->pdid, wq->queue, 2622 (u64)virt_to_phys(wq->queue), wq->bar2_va, 2623 wq->rqt_hwaddr, wq->rqt_size); 2624 2625 return 0; 2626 err_free_queue: 2627 dma_free_coherent(&rdev->lldi.pdev->dev, 2628 wq->memsize, wq->queue, 2629 dma_unmap_addr(wq, mapping)); 2630 err_free_rqtpool: 2631 c4iw_rqtpool_free(rdev, wq->rqt_hwaddr, wq->rqt_size); 2632 err_free_pending_wrs: 2633 if (!user) 2634 kfree(wq->pending_wrs); 2635 err_free_sw_rq: 2636 if (!user) 2637 kfree(wq->sw_rq); 2638 err_put_qpid: 2639 c4iw_put_qpid(rdev, wq->qid, uctx); 2640 err: 2641 return ret; 2642 } 2643 2644 void c4iw_copy_wr_to_srq(struct t4_srq *srq, union t4_recv_wr *wqe, u8 len16) 2645 { 2646 u64 *src, *dst; 2647 2648 src = (u64 *)wqe; 2649 dst = (u64 *)((u8 *)srq->queue + srq->wq_pidx * T4_EQ_ENTRY_SIZE); 2650 while (len16) { 2651 *dst++ = *src++; 2652 if (dst >= (u64 *)&srq->queue[srq->size]) 2653 dst = (u64 *)srq->queue; 2654 *dst++ = *src++; 2655 if (dst >= (u64 *)&srq->queue[srq->size]) 2656 dst = (u64 *)srq->queue; 2657 len16--; 2658 } 2659 } 2660 2661 int c4iw_create_srq(struct ib_srq *ib_srq, struct ib_srq_init_attr *attrs, 2662 struct ib_udata *udata) 2663 { 2664 struct ib_pd *pd = ib_srq->pd; 2665 struct c4iw_dev *rhp; 2666 struct c4iw_srq *srq = to_c4iw_srq(ib_srq); 2667 struct c4iw_pd *php; 2668 struct c4iw_create_srq_resp uresp; 2669 struct c4iw_ucontext *ucontext; 2670 struct c4iw_mm_entry *srq_key_mm, *srq_db_key_mm; 2671 int rqsize; 2672 int ret; 2673 int wr_len; 2674 2675 if (attrs->srq_type != IB_SRQT_BASIC) 2676 return -EOPNOTSUPP; 2677 2678 pr_debug("%s ib_pd %p\n", __func__, pd); 2679 2680 php = to_c4iw_pd(pd); 2681 rhp = php->rhp; 2682 2683 if (!rhp->rdev.lldi.vr->srq.size) 2684 return -EINVAL; 2685 if (attrs->attr.max_wr > rhp->rdev.hw_queue.t4_max_rq_size) 2686 return -E2BIG; 2687 if (attrs->attr.max_sge > T4_MAX_RECV_SGE) 2688 return -E2BIG; 2689 2690 /* 2691 * SRQ RQT and RQ must be a power of 2 and at least 16 deep. 2692 */ 2693 rqsize = attrs->attr.max_wr + 1; 2694 rqsize = roundup_pow_of_two(max_t(u16, rqsize, 16)); 2695 2696 ucontext = rdma_udata_to_drv_context(udata, struct c4iw_ucontext, 2697 ibucontext); 2698 2699 srq->wr_waitp = c4iw_alloc_wr_wait(GFP_KERNEL); 2700 if (!srq->wr_waitp) 2701 return -ENOMEM; 2702 2703 srq->idx = c4iw_alloc_srq_idx(&rhp->rdev); 2704 if (srq->idx < 0) { 2705 ret = -ENOMEM; 2706 goto err_free_wr_wait; 2707 } 2708 2709 wr_len = sizeof(struct fw_ri_res_wr) + sizeof(struct fw_ri_res); 2710 srq->destroy_skb = alloc_skb(wr_len, GFP_KERNEL); 2711 if (!srq->destroy_skb) { 2712 ret = -ENOMEM; 2713 goto err_free_srq_idx; 2714 } 2715 2716 srq->rhp = rhp; 2717 srq->pdid = php->pdid; 2718 2719 srq->wq.size = rqsize; 2720 srq->wq.memsize = 2721 (rqsize + rhp->rdev.hw_queue.t4_eq_status_entries) * 2722 sizeof(*srq->wq.queue); 2723 if (ucontext) 2724 srq->wq.memsize = roundup(srq->wq.memsize, PAGE_SIZE); 2725 2726 ret = alloc_srq_queue(srq, ucontext ? &ucontext->uctx : 2727 &rhp->rdev.uctx, srq->wr_waitp); 2728 if (ret) 2729 goto err_free_skb; 2730 attrs->attr.max_wr = rqsize - 1; 2731 2732 if (CHELSIO_CHIP_VERSION(rhp->rdev.lldi.adapter_type) > CHELSIO_T6) 2733 srq->flags = T4_SRQ_LIMIT_SUPPORT; 2734 2735 if (udata) { 2736 srq_key_mm = kmalloc(sizeof(*srq_key_mm), GFP_KERNEL); 2737 if (!srq_key_mm) { 2738 ret = -ENOMEM; 2739 goto err_free_queue; 2740 } 2741 srq_db_key_mm = kmalloc(sizeof(*srq_db_key_mm), GFP_KERNEL); 2742 if (!srq_db_key_mm) { 2743 ret = -ENOMEM; 2744 goto err_free_srq_key_mm; 2745 } 2746 memset(&uresp, 0, sizeof(uresp)); 2747 uresp.flags = srq->flags; 2748 uresp.qid_mask = rhp->rdev.qpmask; 2749 uresp.srqid = srq->wq.qid; 2750 uresp.srq_size = srq->wq.size; 2751 uresp.srq_memsize = srq->wq.memsize; 2752 uresp.rqt_abs_idx = srq->wq.rqt_abs_idx; 2753 spin_lock(&ucontext->mmap_lock); 2754 uresp.srq_key = ucontext->key; 2755 ucontext->key += PAGE_SIZE; 2756 uresp.srq_db_gts_key = ucontext->key; 2757 ucontext->key += PAGE_SIZE; 2758 spin_unlock(&ucontext->mmap_lock); 2759 ret = ib_copy_to_udata(udata, &uresp, sizeof(uresp)); 2760 if (ret) 2761 goto err_free_srq_db_key_mm; 2762 srq_key_mm->key = uresp.srq_key; 2763 srq_key_mm->addr = virt_to_phys(srq->wq.queue); 2764 srq_key_mm->len = PAGE_ALIGN(srq->wq.memsize); 2765 insert_mmap(ucontext, srq_key_mm); 2766 srq_db_key_mm->key = uresp.srq_db_gts_key; 2767 srq_db_key_mm->addr = (u64)(unsigned long)srq->wq.bar2_pa; 2768 srq_db_key_mm->len = PAGE_SIZE; 2769 insert_mmap(ucontext, srq_db_key_mm); 2770 } 2771 2772 pr_debug("%s srq qid %u idx %u size %u memsize %lu num_entries %u\n", 2773 __func__, srq->wq.qid, srq->idx, srq->wq.size, 2774 (unsigned long)srq->wq.memsize, attrs->attr.max_wr); 2775 2776 spin_lock_init(&srq->lock); 2777 return 0; 2778 2779 err_free_srq_db_key_mm: 2780 kfree(srq_db_key_mm); 2781 err_free_srq_key_mm: 2782 kfree(srq_key_mm); 2783 err_free_queue: 2784 free_srq_queue(srq, ucontext ? &ucontext->uctx : &rhp->rdev.uctx, 2785 srq->wr_waitp); 2786 err_free_skb: 2787 kfree_skb(srq->destroy_skb); 2788 err_free_srq_idx: 2789 c4iw_free_srq_idx(&rhp->rdev, srq->idx); 2790 err_free_wr_wait: 2791 c4iw_put_wr_wait(srq->wr_waitp); 2792 return ret; 2793 } 2794 2795 int c4iw_destroy_srq(struct ib_srq *ibsrq, struct ib_udata *udata) 2796 { 2797 struct c4iw_dev *rhp; 2798 struct c4iw_srq *srq; 2799 struct c4iw_ucontext *ucontext; 2800 2801 srq = to_c4iw_srq(ibsrq); 2802 rhp = srq->rhp; 2803 2804 pr_debug("%s id %d\n", __func__, srq->wq.qid); 2805 ucontext = rdma_udata_to_drv_context(udata, struct c4iw_ucontext, 2806 ibucontext); 2807 free_srq_queue(srq, ucontext ? &ucontext->uctx : &rhp->rdev.uctx, 2808 srq->wr_waitp); 2809 c4iw_free_srq_idx(&rhp->rdev, srq->idx); 2810 c4iw_put_wr_wait(srq->wr_waitp); 2811 return 0; 2812 } 2813