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 goto free_dma; 299 } 300 301 wq->rdev = rdev; 302 wq->rq.msn = 1; 303 304 /* build fw_ri_res_wr */ 305 wr_len = sizeof(*res_wr) + 2 * sizeof(*res); 306 if (need_rq) 307 wr_len += sizeof(*res); 308 skb = alloc_skb(wr_len, GFP_KERNEL); 309 if (!skb) { 310 ret = -ENOMEM; 311 goto free_dma; 312 } 313 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0); 314 315 res_wr = __skb_put_zero(skb, wr_len); 316 res_wr->op_nres = cpu_to_be32( 317 FW_WR_OP_V(FW_RI_RES_WR) | 318 FW_RI_RES_WR_NRES_V(need_rq ? 2 : 1) | 319 FW_WR_COMPL_F); 320 res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16)); 321 res_wr->cookie = (uintptr_t)wr_waitp; 322 res = res_wr->res; 323 res->u.sqrq.restype = FW_RI_RES_TYPE_SQ; 324 res->u.sqrq.op = FW_RI_RES_OP_WRITE; 325 326 /* 327 * eqsize is the number of 64B entries plus the status page size. 328 */ 329 eqsize = wq->sq.size * T4_SQ_NUM_SLOTS + 330 rdev->hw_queue.t4_eq_status_entries; 331 332 res->u.sqrq.fetchszm_to_iqid = cpu_to_be32( 333 FW_RI_RES_WR_HOSTFCMODE_V(0) | /* no host cidx updates */ 334 FW_RI_RES_WR_CPRIO_V(0) | /* don't keep in chip cache */ 335 FW_RI_RES_WR_PCIECHN_V(0) | /* set by uP at ri_init time */ 336 (t4_sq_onchip(&wq->sq) ? FW_RI_RES_WR_ONCHIP_F : 0) | 337 FW_RI_RES_WR_IQID_V(scq->cqid)); 338 res->u.sqrq.dcaen_to_eqsize = cpu_to_be32( 339 FW_RI_RES_WR_DCAEN_V(0) | 340 FW_RI_RES_WR_DCACPU_V(0) | 341 FW_RI_RES_WR_FBMIN_V(2) | 342 (t4_sq_onchip(&wq->sq) ? FW_RI_RES_WR_FBMAX_V(2) : 343 FW_RI_RES_WR_FBMAX_V(3)) | 344 FW_RI_RES_WR_CIDXFTHRESHO_V(0) | 345 FW_RI_RES_WR_CIDXFTHRESH_V(0) | 346 FW_RI_RES_WR_EQSIZE_V(eqsize)); 347 res->u.sqrq.eqid = cpu_to_be32(wq->sq.qid); 348 res->u.sqrq.eqaddr = cpu_to_be64(wq->sq.dma_addr); 349 350 if (need_rq) { 351 res++; 352 res->u.sqrq.restype = FW_RI_RES_TYPE_RQ; 353 res->u.sqrq.op = FW_RI_RES_OP_WRITE; 354 355 /* 356 * eqsize is the number of 64B entries plus the status page size 357 */ 358 eqsize = wq->rq.size * T4_RQ_NUM_SLOTS + 359 rdev->hw_queue.t4_eq_status_entries; 360 res->u.sqrq.fetchszm_to_iqid = 361 /* no host cidx updates */ 362 cpu_to_be32(FW_RI_RES_WR_HOSTFCMODE_V(0) | 363 /* don't keep in chip cache */ 364 FW_RI_RES_WR_CPRIO_V(0) | 365 /* set by uP at ri_init time */ 366 FW_RI_RES_WR_PCIECHN_V(0) | 367 FW_RI_RES_WR_IQID_V(rcq->cqid)); 368 res->u.sqrq.dcaen_to_eqsize = 369 cpu_to_be32(FW_RI_RES_WR_DCAEN_V(0) | 370 FW_RI_RES_WR_DCACPU_V(0) | 371 FW_RI_RES_WR_FBMIN_V(2) | 372 FW_RI_RES_WR_FBMAX_V(3) | 373 FW_RI_RES_WR_CIDXFTHRESHO_V(0) | 374 FW_RI_RES_WR_CIDXFTHRESH_V(0) | 375 FW_RI_RES_WR_EQSIZE_V(eqsize)); 376 res->u.sqrq.eqid = cpu_to_be32(wq->rq.qid); 377 res->u.sqrq.eqaddr = cpu_to_be64(wq->rq.dma_addr); 378 } 379 380 c4iw_init_wr_wait(wr_waitp); 381 ret = c4iw_ref_send_wait(rdev, skb, wr_waitp, 0, wq->sq.qid, __func__); 382 if (ret) 383 goto free_dma; 384 385 pr_debug("sqid 0x%x rqid 0x%x kdb 0x%p sq_bar2_addr %p rq_bar2_addr %p\n", 386 wq->sq.qid, wq->rq.qid, wq->db, 387 wq->sq.bar2_va, wq->rq.bar2_va); 388 389 return 0; 390 free_dma: 391 if (need_rq) 392 dma_free_coherent(&rdev->lldi.pdev->dev, 393 wq->rq.memsize, wq->rq.queue, 394 dma_unmap_addr(&wq->rq, mapping)); 395 free_sq: 396 dealloc_sq(rdev, &wq->sq); 397 free_hwaddr: 398 if (need_rq) 399 c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size); 400 free_sw_rq: 401 if (need_rq) 402 kfree(wq->rq.sw_rq); 403 free_sw_sq: 404 kfree(wq->sq.sw_sq); 405 free_rq_qid: 406 if (need_rq) 407 c4iw_put_qpid(rdev, wq->rq.qid, uctx); 408 free_sq_qid: 409 c4iw_put_qpid(rdev, wq->sq.qid, uctx); 410 return ret; 411 } 412 413 static int build_immd(struct t4_sq *sq, struct fw_ri_immd *immdp, 414 const struct ib_send_wr *wr, int max, u32 *plenp) 415 { 416 u8 *dstp, *srcp; 417 u32 plen = 0; 418 int i; 419 int rem, len; 420 421 dstp = (u8 *)immdp->data; 422 for (i = 0; i < wr->num_sge; i++) { 423 if ((plen + wr->sg_list[i].length) > max) 424 return -EMSGSIZE; 425 srcp = (u8 *)(unsigned long)wr->sg_list[i].addr; 426 plen += wr->sg_list[i].length; 427 rem = wr->sg_list[i].length; 428 while (rem) { 429 if (dstp == (u8 *)&sq->queue[sq->size]) 430 dstp = (u8 *)sq->queue; 431 if (rem <= (u8 *)&sq->queue[sq->size] - dstp) 432 len = rem; 433 else 434 len = (u8 *)&sq->queue[sq->size] - dstp; 435 memcpy(dstp, srcp, len); 436 dstp += len; 437 srcp += len; 438 rem -= len; 439 } 440 } 441 len = roundup(plen + sizeof(*immdp), 16) - (plen + sizeof(*immdp)); 442 if (len) 443 memset(dstp, 0, len); 444 immdp->op = FW_RI_DATA_IMMD; 445 immdp->r1 = 0; 446 immdp->r2 = 0; 447 immdp->immdlen = cpu_to_be32(plen); 448 *plenp = plen; 449 return 0; 450 } 451 452 static int build_isgl(__be64 *queue_start, __be64 *queue_end, 453 struct fw_ri_isgl *isglp, struct ib_sge *sg_list, 454 int num_sge, u32 *plenp) 455 456 { 457 int i; 458 u32 plen = 0; 459 __be64 *flitp; 460 461 if ((__be64 *)isglp == queue_end) 462 isglp = (struct fw_ri_isgl *)queue_start; 463 464 flitp = (__be64 *)isglp->sge; 465 466 for (i = 0; i < num_sge; i++) { 467 if ((plen + sg_list[i].length) < plen) 468 return -EMSGSIZE; 469 plen += sg_list[i].length; 470 *flitp = cpu_to_be64(((u64)sg_list[i].lkey << 32) | 471 sg_list[i].length); 472 if (++flitp == queue_end) 473 flitp = queue_start; 474 *flitp = cpu_to_be64(sg_list[i].addr); 475 if (++flitp == queue_end) 476 flitp = queue_start; 477 } 478 *flitp = (__force __be64)0; 479 isglp->op = FW_RI_DATA_ISGL; 480 isglp->r1 = 0; 481 isglp->nsge = cpu_to_be16(num_sge); 482 isglp->r2 = 0; 483 if (plenp) 484 *plenp = plen; 485 return 0; 486 } 487 488 static int build_rdma_send(struct t4_sq *sq, union t4_wr *wqe, 489 const struct ib_send_wr *wr, u8 *len16) 490 { 491 u32 plen; 492 int size; 493 int ret; 494 495 if (wr->num_sge > T4_MAX_SEND_SGE) 496 return -EINVAL; 497 switch (wr->opcode) { 498 case IB_WR_SEND: 499 if (wr->send_flags & IB_SEND_SOLICITED) 500 wqe->send.sendop_pkd = cpu_to_be32( 501 FW_RI_SEND_WR_SENDOP_V(FW_RI_SEND_WITH_SE)); 502 else 503 wqe->send.sendop_pkd = cpu_to_be32( 504 FW_RI_SEND_WR_SENDOP_V(FW_RI_SEND)); 505 wqe->send.stag_inv = 0; 506 break; 507 case IB_WR_SEND_WITH_INV: 508 if (wr->send_flags & IB_SEND_SOLICITED) 509 wqe->send.sendop_pkd = cpu_to_be32( 510 FW_RI_SEND_WR_SENDOP_V(FW_RI_SEND_WITH_SE_INV)); 511 else 512 wqe->send.sendop_pkd = cpu_to_be32( 513 FW_RI_SEND_WR_SENDOP_V(FW_RI_SEND_WITH_INV)); 514 wqe->send.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey); 515 break; 516 517 default: 518 return -EINVAL; 519 } 520 wqe->send.r3 = 0; 521 wqe->send.r4 = 0; 522 523 plen = 0; 524 if (wr->num_sge) { 525 if (wr->send_flags & IB_SEND_INLINE) { 526 ret = build_immd(sq, wqe->send.u.immd_src, wr, 527 T4_MAX_SEND_INLINE, &plen); 528 if (ret) 529 return ret; 530 size = sizeof(wqe->send) + sizeof(struct fw_ri_immd) + 531 plen; 532 } else { 533 ret = build_isgl((__be64 *)sq->queue, 534 (__be64 *)&sq->queue[sq->size], 535 wqe->send.u.isgl_src, 536 wr->sg_list, wr->num_sge, &plen); 537 if (ret) 538 return ret; 539 size = sizeof(wqe->send) + sizeof(struct fw_ri_isgl) + 540 wr->num_sge * sizeof(struct fw_ri_sge); 541 } 542 } else { 543 wqe->send.u.immd_src[0].op = FW_RI_DATA_IMMD; 544 wqe->send.u.immd_src[0].r1 = 0; 545 wqe->send.u.immd_src[0].r2 = 0; 546 wqe->send.u.immd_src[0].immdlen = 0; 547 size = sizeof(wqe->send) + sizeof(struct fw_ri_immd); 548 plen = 0; 549 } 550 *len16 = DIV_ROUND_UP(size, 16); 551 wqe->send.plen = cpu_to_be32(plen); 552 return 0; 553 } 554 555 static int build_rdma_write(struct t4_sq *sq, union t4_wr *wqe, 556 const struct ib_send_wr *wr, u8 *len16) 557 { 558 u32 plen; 559 int size; 560 int ret; 561 562 if (wr->num_sge > T4_MAX_SEND_SGE) 563 return -EINVAL; 564 565 /* 566 * iWARP protocol supports 64 bit immediate data but rdma api 567 * limits it to 32bit. 568 */ 569 if (wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) 570 wqe->write.iw_imm_data.ib_imm_data.imm_data32 = wr->ex.imm_data; 571 else 572 wqe->write.iw_imm_data.ib_imm_data.imm_data32 = 0; 573 wqe->write.stag_sink = cpu_to_be32(rdma_wr(wr)->rkey); 574 wqe->write.to_sink = cpu_to_be64(rdma_wr(wr)->remote_addr); 575 if (wr->num_sge) { 576 if (wr->send_flags & IB_SEND_INLINE) { 577 ret = build_immd(sq, wqe->write.u.immd_src, wr, 578 T4_MAX_WRITE_INLINE, &plen); 579 if (ret) 580 return ret; 581 size = sizeof(wqe->write) + sizeof(struct fw_ri_immd) + 582 plen; 583 } else { 584 ret = build_isgl((__be64 *)sq->queue, 585 (__be64 *)&sq->queue[sq->size], 586 wqe->write.u.isgl_src, 587 wr->sg_list, wr->num_sge, &plen); 588 if (ret) 589 return ret; 590 size = sizeof(wqe->write) + sizeof(struct fw_ri_isgl) + 591 wr->num_sge * sizeof(struct fw_ri_sge); 592 } 593 } else { 594 wqe->write.u.immd_src[0].op = FW_RI_DATA_IMMD; 595 wqe->write.u.immd_src[0].r1 = 0; 596 wqe->write.u.immd_src[0].r2 = 0; 597 wqe->write.u.immd_src[0].immdlen = 0; 598 size = sizeof(wqe->write) + sizeof(struct fw_ri_immd); 599 plen = 0; 600 } 601 *len16 = DIV_ROUND_UP(size, 16); 602 wqe->write.plen = cpu_to_be32(plen); 603 return 0; 604 } 605 606 static void build_immd_cmpl(struct t4_sq *sq, struct fw_ri_immd_cmpl *immdp, 607 struct ib_send_wr *wr) 608 { 609 memcpy((u8 *)immdp->data, (u8 *)(uintptr_t)wr->sg_list->addr, 16); 610 memset(immdp->r1, 0, 6); 611 immdp->op = FW_RI_DATA_IMMD; 612 immdp->immdlen = 16; 613 } 614 615 static void build_rdma_write_cmpl(struct t4_sq *sq, 616 struct fw_ri_rdma_write_cmpl_wr *wcwr, 617 const struct ib_send_wr *wr, u8 *len16) 618 { 619 u32 plen; 620 int size; 621 622 /* 623 * This code assumes the struct fields preceding the write isgl 624 * fit in one 64B WR slot. This is because the WQE is built 625 * directly in the dma queue, and wrapping is only handled 626 * by the code buildling sgls. IE the "fixed part" of the wr 627 * structs must all fit in 64B. The WQE build code should probably be 628 * redesigned to avoid this restriction, but for now just add 629 * the BUILD_BUG_ON() to catch if this WQE struct gets too big. 630 */ 631 BUILD_BUG_ON(offsetof(struct fw_ri_rdma_write_cmpl_wr, u) > 64); 632 633 wcwr->stag_sink = cpu_to_be32(rdma_wr(wr)->rkey); 634 wcwr->to_sink = cpu_to_be64(rdma_wr(wr)->remote_addr); 635 if (wr->next->opcode == IB_WR_SEND) 636 wcwr->stag_inv = 0; 637 else 638 wcwr->stag_inv = cpu_to_be32(wr->next->ex.invalidate_rkey); 639 wcwr->r2 = 0; 640 wcwr->r3 = 0; 641 642 /* SEND_INV SGL */ 643 if (wr->next->send_flags & IB_SEND_INLINE) 644 build_immd_cmpl(sq, &wcwr->u_cmpl.immd_src, wr->next); 645 else 646 build_isgl((__be64 *)sq->queue, (__be64 *)&sq->queue[sq->size], 647 &wcwr->u_cmpl.isgl_src, wr->next->sg_list, 1, NULL); 648 649 /* WRITE SGL */ 650 build_isgl((__be64 *)sq->queue, (__be64 *)&sq->queue[sq->size], 651 wcwr->u.isgl_src, wr->sg_list, wr->num_sge, &plen); 652 653 size = sizeof(*wcwr) + sizeof(struct fw_ri_isgl) + 654 wr->num_sge * sizeof(struct fw_ri_sge); 655 wcwr->plen = cpu_to_be32(plen); 656 *len16 = DIV_ROUND_UP(size, 16); 657 } 658 659 static int build_rdma_read(union t4_wr *wqe, const struct ib_send_wr *wr, 660 u8 *len16) 661 { 662 if (wr->num_sge > 1) 663 return -EINVAL; 664 if (wr->num_sge && wr->sg_list[0].length) { 665 wqe->read.stag_src = cpu_to_be32(rdma_wr(wr)->rkey); 666 wqe->read.to_src_hi = cpu_to_be32((u32)(rdma_wr(wr)->remote_addr 667 >> 32)); 668 wqe->read.to_src_lo = cpu_to_be32((u32)rdma_wr(wr)->remote_addr); 669 wqe->read.stag_sink = cpu_to_be32(wr->sg_list[0].lkey); 670 wqe->read.plen = cpu_to_be32(wr->sg_list[0].length); 671 wqe->read.to_sink_hi = cpu_to_be32((u32)(wr->sg_list[0].addr 672 >> 32)); 673 wqe->read.to_sink_lo = cpu_to_be32((u32)(wr->sg_list[0].addr)); 674 } else { 675 wqe->read.stag_src = cpu_to_be32(2); 676 wqe->read.to_src_hi = 0; 677 wqe->read.to_src_lo = 0; 678 wqe->read.stag_sink = cpu_to_be32(2); 679 wqe->read.plen = 0; 680 wqe->read.to_sink_hi = 0; 681 wqe->read.to_sink_lo = 0; 682 } 683 wqe->read.r2 = 0; 684 wqe->read.r5 = 0; 685 *len16 = DIV_ROUND_UP(sizeof(wqe->read), 16); 686 return 0; 687 } 688 689 static void post_write_cmpl(struct c4iw_qp *qhp, const struct ib_send_wr *wr) 690 { 691 bool send_signaled = (wr->next->send_flags & IB_SEND_SIGNALED) || 692 qhp->sq_sig_all; 693 bool write_signaled = (wr->send_flags & IB_SEND_SIGNALED) || 694 qhp->sq_sig_all; 695 struct t4_swsqe *swsqe; 696 union t4_wr *wqe; 697 u16 write_wrid; 698 u8 len16; 699 u16 idx; 700 701 /* 702 * The sw_sq entries still look like a WRITE and a SEND and consume 703 * 2 slots. The FW WR, however, will be a single uber-WR. 704 */ 705 wqe = (union t4_wr *)((u8 *)qhp->wq.sq.queue + 706 qhp->wq.sq.wq_pidx * T4_EQ_ENTRY_SIZE); 707 build_rdma_write_cmpl(&qhp->wq.sq, &wqe->write_cmpl, wr, &len16); 708 709 /* WRITE swsqe */ 710 swsqe = &qhp->wq.sq.sw_sq[qhp->wq.sq.pidx]; 711 swsqe->opcode = FW_RI_RDMA_WRITE; 712 swsqe->idx = qhp->wq.sq.pidx; 713 swsqe->complete = 0; 714 swsqe->signaled = write_signaled; 715 swsqe->flushed = 0; 716 swsqe->wr_id = wr->wr_id; 717 if (c4iw_wr_log) { 718 swsqe->sge_ts = 719 cxgb4_read_sge_timestamp(qhp->rhp->rdev.lldi.ports[0]); 720 swsqe->host_time = ktime_get(); 721 } 722 723 write_wrid = qhp->wq.sq.pidx; 724 725 /* just bump the sw_sq */ 726 qhp->wq.sq.in_use++; 727 if (++qhp->wq.sq.pidx == qhp->wq.sq.size) 728 qhp->wq.sq.pidx = 0; 729 730 /* SEND_WITH_INV swsqe */ 731 swsqe = &qhp->wq.sq.sw_sq[qhp->wq.sq.pidx]; 732 if (wr->next->opcode == IB_WR_SEND) 733 swsqe->opcode = FW_RI_SEND; 734 else 735 swsqe->opcode = FW_RI_SEND_WITH_INV; 736 swsqe->idx = qhp->wq.sq.pidx; 737 swsqe->complete = 0; 738 swsqe->signaled = send_signaled; 739 swsqe->flushed = 0; 740 swsqe->wr_id = wr->next->wr_id; 741 if (c4iw_wr_log) { 742 swsqe->sge_ts = 743 cxgb4_read_sge_timestamp(qhp->rhp->rdev.lldi.ports[0]); 744 swsqe->host_time = ktime_get(); 745 } 746 747 wqe->write_cmpl.flags_send = send_signaled ? FW_RI_COMPLETION_FLAG : 0; 748 wqe->write_cmpl.wrid_send = qhp->wq.sq.pidx; 749 750 init_wr_hdr(wqe, write_wrid, FW_RI_RDMA_WRITE_CMPL_WR, 751 write_signaled ? FW_RI_COMPLETION_FLAG : 0, len16); 752 t4_sq_produce(&qhp->wq, len16); 753 idx = DIV_ROUND_UP(len16 * 16, T4_EQ_ENTRY_SIZE); 754 755 t4_ring_sq_db(&qhp->wq, idx, wqe); 756 } 757 758 static int build_rdma_recv(struct c4iw_qp *qhp, union t4_recv_wr *wqe, 759 const struct ib_recv_wr *wr, u8 *len16) 760 { 761 int ret; 762 763 ret = build_isgl((__be64 *)qhp->wq.rq.queue, 764 (__be64 *)&qhp->wq.rq.queue[qhp->wq.rq.size], 765 &wqe->recv.isgl, wr->sg_list, wr->num_sge, NULL); 766 if (ret) 767 return ret; 768 *len16 = DIV_ROUND_UP( 769 sizeof(wqe->recv) + wr->num_sge * sizeof(struct fw_ri_sge), 16); 770 return 0; 771 } 772 773 static int build_srq_recv(union t4_recv_wr *wqe, const struct ib_recv_wr *wr, 774 u8 *len16) 775 { 776 int ret; 777 778 ret = build_isgl((__be64 *)wqe, (__be64 *)(wqe + 1), 779 &wqe->recv.isgl, wr->sg_list, wr->num_sge, NULL); 780 if (ret) 781 return ret; 782 *len16 = DIV_ROUND_UP(sizeof(wqe->recv) + 783 wr->num_sge * sizeof(struct fw_ri_sge), 16); 784 return 0; 785 } 786 787 static void build_tpte_memreg(struct fw_ri_fr_nsmr_tpte_wr *fr, 788 const struct ib_reg_wr *wr, struct c4iw_mr *mhp, 789 u8 *len16) 790 { 791 __be64 *p = (__be64 *)fr->pbl; 792 793 fr->r2 = cpu_to_be32(0); 794 fr->stag = cpu_to_be32(mhp->ibmr.rkey); 795 796 fr->tpte.valid_to_pdid = cpu_to_be32(FW_RI_TPTE_VALID_F | 797 FW_RI_TPTE_STAGKEY_V((mhp->ibmr.rkey & FW_RI_TPTE_STAGKEY_M)) | 798 FW_RI_TPTE_STAGSTATE_V(1) | 799 FW_RI_TPTE_STAGTYPE_V(FW_RI_STAG_NSMR) | 800 FW_RI_TPTE_PDID_V(mhp->attr.pdid)); 801 fr->tpte.locread_to_qpid = cpu_to_be32( 802 FW_RI_TPTE_PERM_V(c4iw_ib_to_tpt_access(wr->access)) | 803 FW_RI_TPTE_ADDRTYPE_V(FW_RI_VA_BASED_TO) | 804 FW_RI_TPTE_PS_V(ilog2(wr->mr->page_size) - 12)); 805 fr->tpte.nosnoop_pbladdr = cpu_to_be32(FW_RI_TPTE_PBLADDR_V( 806 PBL_OFF(&mhp->rhp->rdev, mhp->attr.pbl_addr)>>3)); 807 fr->tpte.dca_mwbcnt_pstag = cpu_to_be32(0); 808 fr->tpte.len_hi = cpu_to_be32(0); 809 fr->tpte.len_lo = cpu_to_be32(mhp->ibmr.length); 810 fr->tpte.va_hi = cpu_to_be32(mhp->ibmr.iova >> 32); 811 fr->tpte.va_lo_fbo = cpu_to_be32(mhp->ibmr.iova & 0xffffffff); 812 813 p[0] = cpu_to_be64((u64)mhp->mpl[0]); 814 p[1] = cpu_to_be64((u64)mhp->mpl[1]); 815 816 *len16 = DIV_ROUND_UP(sizeof(*fr), 16); 817 } 818 819 static int build_memreg(struct t4_sq *sq, union t4_wr *wqe, 820 const struct ib_reg_wr *wr, struct c4iw_mr *mhp, 821 u8 *len16, bool dsgl_supported) 822 { 823 struct fw_ri_immd *imdp; 824 __be64 *p; 825 int i; 826 int pbllen = roundup(mhp->mpl_len * sizeof(u64), 32); 827 int rem; 828 829 if (mhp->mpl_len > t4_max_fr_depth(dsgl_supported && use_dsgl)) 830 return -EINVAL; 831 832 wqe->fr.qpbinde_to_dcacpu = 0; 833 wqe->fr.pgsz_shift = ilog2(wr->mr->page_size) - 12; 834 wqe->fr.addr_type = FW_RI_VA_BASED_TO; 835 wqe->fr.mem_perms = c4iw_ib_to_tpt_access(wr->access); 836 wqe->fr.len_hi = 0; 837 wqe->fr.len_lo = cpu_to_be32(mhp->ibmr.length); 838 wqe->fr.stag = cpu_to_be32(wr->key); 839 wqe->fr.va_hi = cpu_to_be32(mhp->ibmr.iova >> 32); 840 wqe->fr.va_lo_fbo = cpu_to_be32(mhp->ibmr.iova & 841 0xffffffff); 842 843 if (dsgl_supported && use_dsgl && (pbllen > max_fr_immd)) { 844 struct fw_ri_dsgl *sglp; 845 846 for (i = 0; i < mhp->mpl_len; i++) 847 mhp->mpl[i] = (__force u64)cpu_to_be64((u64)mhp->mpl[i]); 848 849 sglp = (struct fw_ri_dsgl *)(&wqe->fr + 1); 850 sglp->op = FW_RI_DATA_DSGL; 851 sglp->r1 = 0; 852 sglp->nsge = cpu_to_be16(1); 853 sglp->addr0 = cpu_to_be64(mhp->mpl_addr); 854 sglp->len0 = cpu_to_be32(pbllen); 855 856 *len16 = DIV_ROUND_UP(sizeof(wqe->fr) + sizeof(*sglp), 16); 857 } else { 858 imdp = (struct fw_ri_immd *)(&wqe->fr + 1); 859 imdp->op = FW_RI_DATA_IMMD; 860 imdp->r1 = 0; 861 imdp->r2 = 0; 862 imdp->immdlen = cpu_to_be32(pbllen); 863 p = (__be64 *)(imdp + 1); 864 rem = pbllen; 865 for (i = 0; i < mhp->mpl_len; i++) { 866 *p = cpu_to_be64((u64)mhp->mpl[i]); 867 rem -= sizeof(*p); 868 if (++p == (__be64 *)&sq->queue[sq->size]) 869 p = (__be64 *)sq->queue; 870 } 871 while (rem) { 872 *p = 0; 873 rem -= sizeof(*p); 874 if (++p == (__be64 *)&sq->queue[sq->size]) 875 p = (__be64 *)sq->queue; 876 } 877 *len16 = DIV_ROUND_UP(sizeof(wqe->fr) + sizeof(*imdp) 878 + pbllen, 16); 879 } 880 return 0; 881 } 882 883 static int build_inv_stag(union t4_wr *wqe, const struct ib_send_wr *wr, 884 u8 *len16) 885 { 886 wqe->inv.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey); 887 wqe->inv.r2 = 0; 888 *len16 = DIV_ROUND_UP(sizeof(wqe->inv), 16); 889 return 0; 890 } 891 892 void c4iw_qp_add_ref(struct ib_qp *qp) 893 { 894 pr_debug("ib_qp %p\n", qp); 895 refcount_inc(&to_c4iw_qp(qp)->qp_refcnt); 896 } 897 898 void c4iw_qp_rem_ref(struct ib_qp *qp) 899 { 900 pr_debug("ib_qp %p\n", qp); 901 if (refcount_dec_and_test(&to_c4iw_qp(qp)->qp_refcnt)) 902 complete(&to_c4iw_qp(qp)->qp_rel_comp); 903 } 904 905 static void add_to_fc_list(struct list_head *head, struct list_head *entry) 906 { 907 if (list_empty(entry)) 908 list_add_tail(entry, head); 909 } 910 911 static int ring_kernel_sq_db(struct c4iw_qp *qhp, u16 inc) 912 { 913 unsigned long flags; 914 915 xa_lock_irqsave(&qhp->rhp->qps, flags); 916 spin_lock(&qhp->lock); 917 if (qhp->rhp->db_state == NORMAL) 918 t4_ring_sq_db(&qhp->wq, inc, NULL); 919 else { 920 add_to_fc_list(&qhp->rhp->db_fc_list, &qhp->db_fc_entry); 921 qhp->wq.sq.wq_pidx_inc += inc; 922 } 923 spin_unlock(&qhp->lock); 924 xa_unlock_irqrestore(&qhp->rhp->qps, flags); 925 return 0; 926 } 927 928 static int ring_kernel_rq_db(struct c4iw_qp *qhp, u16 inc) 929 { 930 unsigned long flags; 931 932 xa_lock_irqsave(&qhp->rhp->qps, flags); 933 spin_lock(&qhp->lock); 934 if (qhp->rhp->db_state == NORMAL) 935 t4_ring_rq_db(&qhp->wq, inc, NULL); 936 else { 937 add_to_fc_list(&qhp->rhp->db_fc_list, &qhp->db_fc_entry); 938 qhp->wq.rq.wq_pidx_inc += inc; 939 } 940 spin_unlock(&qhp->lock); 941 xa_unlock_irqrestore(&qhp->rhp->qps, flags); 942 return 0; 943 } 944 945 static int ib_to_fw_opcode(int ib_opcode) 946 { 947 int opcode; 948 949 switch (ib_opcode) { 950 case IB_WR_SEND_WITH_INV: 951 opcode = FW_RI_SEND_WITH_INV; 952 break; 953 case IB_WR_SEND: 954 opcode = FW_RI_SEND; 955 break; 956 case IB_WR_RDMA_WRITE: 957 opcode = FW_RI_RDMA_WRITE; 958 break; 959 case IB_WR_RDMA_WRITE_WITH_IMM: 960 opcode = FW_RI_WRITE_IMMEDIATE; 961 break; 962 case IB_WR_RDMA_READ: 963 case IB_WR_RDMA_READ_WITH_INV: 964 opcode = FW_RI_READ_REQ; 965 break; 966 case IB_WR_REG_MR: 967 opcode = FW_RI_FAST_REGISTER; 968 break; 969 case IB_WR_LOCAL_INV: 970 opcode = FW_RI_LOCAL_INV; 971 break; 972 default: 973 opcode = -EINVAL; 974 } 975 return opcode; 976 } 977 978 static int complete_sq_drain_wr(struct c4iw_qp *qhp, 979 const struct ib_send_wr *wr) 980 { 981 struct t4_cqe cqe = {}; 982 struct c4iw_cq *schp; 983 unsigned long flag; 984 struct t4_cq *cq; 985 int opcode; 986 987 schp = to_c4iw_cq(qhp->ibqp.send_cq); 988 cq = &schp->cq; 989 990 opcode = ib_to_fw_opcode(wr->opcode); 991 if (opcode < 0) 992 return opcode; 993 994 cqe.u.drain_cookie = wr->wr_id; 995 cqe.header = cpu_to_be32(CQE_STATUS_V(T4_ERR_SWFLUSH) | 996 CQE_OPCODE_V(opcode) | 997 CQE_TYPE_V(1) | 998 CQE_SWCQE_V(1) | 999 CQE_DRAIN_V(1) | 1000 CQE_QPID_V(qhp->wq.sq.qid)); 1001 1002 spin_lock_irqsave(&schp->lock, flag); 1003 cqe.bits_type_ts = cpu_to_be64(CQE_GENBIT_V((u64)cq->gen)); 1004 cq->sw_queue[cq->sw_pidx] = cqe; 1005 t4_swcq_produce(cq); 1006 spin_unlock_irqrestore(&schp->lock, flag); 1007 1008 if (t4_clear_cq_armed(&schp->cq)) { 1009 spin_lock_irqsave(&schp->comp_handler_lock, flag); 1010 (*schp->ibcq.comp_handler)(&schp->ibcq, 1011 schp->ibcq.cq_context); 1012 spin_unlock_irqrestore(&schp->comp_handler_lock, flag); 1013 } 1014 return 0; 1015 } 1016 1017 static int complete_sq_drain_wrs(struct c4iw_qp *qhp, 1018 const struct ib_send_wr *wr, 1019 const struct ib_send_wr **bad_wr) 1020 { 1021 int ret = 0; 1022 1023 while (wr) { 1024 ret = complete_sq_drain_wr(qhp, wr); 1025 if (ret) { 1026 *bad_wr = wr; 1027 break; 1028 } 1029 wr = wr->next; 1030 } 1031 return ret; 1032 } 1033 1034 static void complete_rq_drain_wr(struct c4iw_qp *qhp, 1035 const struct ib_recv_wr *wr) 1036 { 1037 struct t4_cqe cqe = {}; 1038 struct c4iw_cq *rchp; 1039 unsigned long flag; 1040 struct t4_cq *cq; 1041 1042 rchp = to_c4iw_cq(qhp->ibqp.recv_cq); 1043 cq = &rchp->cq; 1044 1045 cqe.u.drain_cookie = wr->wr_id; 1046 cqe.header = cpu_to_be32(CQE_STATUS_V(T4_ERR_SWFLUSH) | 1047 CQE_OPCODE_V(FW_RI_SEND) | 1048 CQE_TYPE_V(0) | 1049 CQE_SWCQE_V(1) | 1050 CQE_DRAIN_V(1) | 1051 CQE_QPID_V(qhp->wq.sq.qid)); 1052 1053 spin_lock_irqsave(&rchp->lock, flag); 1054 cqe.bits_type_ts = cpu_to_be64(CQE_GENBIT_V((u64)cq->gen)); 1055 cq->sw_queue[cq->sw_pidx] = cqe; 1056 t4_swcq_produce(cq); 1057 spin_unlock_irqrestore(&rchp->lock, flag); 1058 1059 if (t4_clear_cq_armed(&rchp->cq)) { 1060 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 1061 (*rchp->ibcq.comp_handler)(&rchp->ibcq, 1062 rchp->ibcq.cq_context); 1063 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 1064 } 1065 } 1066 1067 static void complete_rq_drain_wrs(struct c4iw_qp *qhp, 1068 const struct ib_recv_wr *wr) 1069 { 1070 while (wr) { 1071 complete_rq_drain_wr(qhp, wr); 1072 wr = wr->next; 1073 } 1074 } 1075 1076 int c4iw_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, 1077 const struct ib_send_wr **bad_wr) 1078 { 1079 int err = 0; 1080 u8 len16 = 0; 1081 enum fw_wr_opcodes fw_opcode = 0; 1082 enum fw_ri_wr_flags fw_flags; 1083 struct c4iw_qp *qhp; 1084 struct c4iw_dev *rhp; 1085 union t4_wr *wqe = NULL; 1086 u32 num_wrs; 1087 struct t4_swsqe *swsqe; 1088 unsigned long flag; 1089 u16 idx = 0; 1090 1091 qhp = to_c4iw_qp(ibqp); 1092 rhp = qhp->rhp; 1093 spin_lock_irqsave(&qhp->lock, flag); 1094 1095 /* 1096 * If the qp has been flushed, then just insert a special 1097 * drain cqe. 1098 */ 1099 if (qhp->wq.flushed) { 1100 spin_unlock_irqrestore(&qhp->lock, flag); 1101 err = complete_sq_drain_wrs(qhp, wr, bad_wr); 1102 return err; 1103 } 1104 num_wrs = t4_sq_avail(&qhp->wq); 1105 if (num_wrs == 0) { 1106 spin_unlock_irqrestore(&qhp->lock, flag); 1107 *bad_wr = wr; 1108 return -ENOMEM; 1109 } 1110 1111 /* 1112 * Fastpath for NVMe-oF target WRITE + SEND_WITH_INV wr chain which is 1113 * the response for small NVMEe-oF READ requests. If the chain is 1114 * exactly a WRITE->SEND_WITH_INV or a WRITE->SEND and the sgl depths 1115 * and lengths meet the requirements of the fw_ri_write_cmpl_wr work 1116 * request, then build and post the write_cmpl WR. If any of the tests 1117 * below are not true, then we continue on with the tradtional WRITE 1118 * and SEND WRs. 1119 */ 1120 if (qhp->rhp->rdev.lldi.write_cmpl_support && 1121 CHELSIO_CHIP_VERSION(qhp->rhp->rdev.lldi.adapter_type) >= 1122 CHELSIO_T5 && 1123 wr && wr->next && !wr->next->next && 1124 wr->opcode == IB_WR_RDMA_WRITE && 1125 wr->sg_list[0].length && wr->num_sge <= T4_WRITE_CMPL_MAX_SGL && 1126 (wr->next->opcode == IB_WR_SEND || 1127 wr->next->opcode == IB_WR_SEND_WITH_INV) && 1128 wr->next->sg_list[0].length == T4_WRITE_CMPL_MAX_CQE && 1129 wr->next->num_sge == 1 && num_wrs >= 2) { 1130 post_write_cmpl(qhp, wr); 1131 spin_unlock_irqrestore(&qhp->lock, flag); 1132 return 0; 1133 } 1134 1135 while (wr) { 1136 if (num_wrs == 0) { 1137 err = -ENOMEM; 1138 *bad_wr = wr; 1139 break; 1140 } 1141 wqe = (union t4_wr *)((u8 *)qhp->wq.sq.queue + 1142 qhp->wq.sq.wq_pidx * T4_EQ_ENTRY_SIZE); 1143 1144 fw_flags = 0; 1145 if (wr->send_flags & IB_SEND_SOLICITED) 1146 fw_flags |= FW_RI_SOLICITED_EVENT_FLAG; 1147 if (wr->send_flags & IB_SEND_SIGNALED || qhp->sq_sig_all) 1148 fw_flags |= FW_RI_COMPLETION_FLAG; 1149 swsqe = &qhp->wq.sq.sw_sq[qhp->wq.sq.pidx]; 1150 switch (wr->opcode) { 1151 case IB_WR_SEND_WITH_INV: 1152 case IB_WR_SEND: 1153 if (wr->send_flags & IB_SEND_FENCE) 1154 fw_flags |= FW_RI_READ_FENCE_FLAG; 1155 fw_opcode = FW_RI_SEND_WR; 1156 if (wr->opcode == IB_WR_SEND) 1157 swsqe->opcode = FW_RI_SEND; 1158 else 1159 swsqe->opcode = FW_RI_SEND_WITH_INV; 1160 err = build_rdma_send(&qhp->wq.sq, wqe, wr, &len16); 1161 break; 1162 case IB_WR_RDMA_WRITE_WITH_IMM: 1163 if (unlikely(!rhp->rdev.lldi.write_w_imm_support)) { 1164 err = -EINVAL; 1165 break; 1166 } 1167 fw_flags |= FW_RI_RDMA_WRITE_WITH_IMMEDIATE; 1168 /*FALLTHROUGH*/ 1169 case IB_WR_RDMA_WRITE: 1170 fw_opcode = FW_RI_RDMA_WRITE_WR; 1171 swsqe->opcode = FW_RI_RDMA_WRITE; 1172 err = build_rdma_write(&qhp->wq.sq, wqe, wr, &len16); 1173 break; 1174 case IB_WR_RDMA_READ: 1175 case IB_WR_RDMA_READ_WITH_INV: 1176 fw_opcode = FW_RI_RDMA_READ_WR; 1177 swsqe->opcode = FW_RI_READ_REQ; 1178 if (wr->opcode == IB_WR_RDMA_READ_WITH_INV) { 1179 c4iw_invalidate_mr(rhp, wr->sg_list[0].lkey); 1180 fw_flags = FW_RI_RDMA_READ_INVALIDATE; 1181 } else { 1182 fw_flags = 0; 1183 } 1184 err = build_rdma_read(wqe, wr, &len16); 1185 if (err) 1186 break; 1187 swsqe->read_len = wr->sg_list[0].length; 1188 if (!qhp->wq.sq.oldest_read) 1189 qhp->wq.sq.oldest_read = swsqe; 1190 break; 1191 case IB_WR_REG_MR: { 1192 struct c4iw_mr *mhp = to_c4iw_mr(reg_wr(wr)->mr); 1193 1194 swsqe->opcode = FW_RI_FAST_REGISTER; 1195 if (rhp->rdev.lldi.fr_nsmr_tpte_wr_support && 1196 !mhp->attr.state && mhp->mpl_len <= 2) { 1197 fw_opcode = FW_RI_FR_NSMR_TPTE_WR; 1198 build_tpte_memreg(&wqe->fr_tpte, reg_wr(wr), 1199 mhp, &len16); 1200 } else { 1201 fw_opcode = FW_RI_FR_NSMR_WR; 1202 err = build_memreg(&qhp->wq.sq, wqe, reg_wr(wr), 1203 mhp, &len16, 1204 rhp->rdev.lldi.ulptx_memwrite_dsgl); 1205 if (err) 1206 break; 1207 } 1208 mhp->attr.state = 1; 1209 break; 1210 } 1211 case IB_WR_LOCAL_INV: 1212 if (wr->send_flags & IB_SEND_FENCE) 1213 fw_flags |= FW_RI_LOCAL_FENCE_FLAG; 1214 fw_opcode = FW_RI_INV_LSTAG_WR; 1215 swsqe->opcode = FW_RI_LOCAL_INV; 1216 err = build_inv_stag(wqe, wr, &len16); 1217 c4iw_invalidate_mr(rhp, wr->ex.invalidate_rkey); 1218 break; 1219 default: 1220 pr_warn("%s post of type=%d TBD!\n", __func__, 1221 wr->opcode); 1222 err = -EINVAL; 1223 } 1224 if (err) { 1225 *bad_wr = wr; 1226 break; 1227 } 1228 swsqe->idx = qhp->wq.sq.pidx; 1229 swsqe->complete = 0; 1230 swsqe->signaled = (wr->send_flags & IB_SEND_SIGNALED) || 1231 qhp->sq_sig_all; 1232 swsqe->flushed = 0; 1233 swsqe->wr_id = wr->wr_id; 1234 if (c4iw_wr_log) { 1235 swsqe->sge_ts = cxgb4_read_sge_timestamp( 1236 rhp->rdev.lldi.ports[0]); 1237 swsqe->host_time = ktime_get(); 1238 } 1239 1240 init_wr_hdr(wqe, qhp->wq.sq.pidx, fw_opcode, fw_flags, len16); 1241 1242 pr_debug("cookie 0x%llx pidx 0x%x opcode 0x%x read_len %u\n", 1243 (unsigned long long)wr->wr_id, qhp->wq.sq.pidx, 1244 swsqe->opcode, swsqe->read_len); 1245 wr = wr->next; 1246 num_wrs--; 1247 t4_sq_produce(&qhp->wq, len16); 1248 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); 1249 } 1250 if (!rhp->rdev.status_page->db_off) { 1251 t4_ring_sq_db(&qhp->wq, idx, wqe); 1252 spin_unlock_irqrestore(&qhp->lock, flag); 1253 } else { 1254 spin_unlock_irqrestore(&qhp->lock, flag); 1255 ring_kernel_sq_db(qhp, idx); 1256 } 1257 return err; 1258 } 1259 1260 int c4iw_post_receive(struct ib_qp *ibqp, const struct ib_recv_wr *wr, 1261 const struct ib_recv_wr **bad_wr) 1262 { 1263 int err = 0; 1264 struct c4iw_qp *qhp; 1265 union t4_recv_wr *wqe = NULL; 1266 u32 num_wrs; 1267 u8 len16 = 0; 1268 unsigned long flag; 1269 u16 idx = 0; 1270 1271 qhp = to_c4iw_qp(ibqp); 1272 spin_lock_irqsave(&qhp->lock, flag); 1273 1274 /* 1275 * If the qp has been flushed, then just insert a special 1276 * drain cqe. 1277 */ 1278 if (qhp->wq.flushed) { 1279 spin_unlock_irqrestore(&qhp->lock, flag); 1280 complete_rq_drain_wrs(qhp, wr); 1281 return err; 1282 } 1283 num_wrs = t4_rq_avail(&qhp->wq); 1284 if (num_wrs == 0) { 1285 spin_unlock_irqrestore(&qhp->lock, flag); 1286 *bad_wr = wr; 1287 return -ENOMEM; 1288 } 1289 while (wr) { 1290 if (wr->num_sge > T4_MAX_RECV_SGE) { 1291 err = -EINVAL; 1292 *bad_wr = wr; 1293 break; 1294 } 1295 wqe = (union t4_recv_wr *)((u8 *)qhp->wq.rq.queue + 1296 qhp->wq.rq.wq_pidx * 1297 T4_EQ_ENTRY_SIZE); 1298 if (num_wrs) 1299 err = build_rdma_recv(qhp, wqe, wr, &len16); 1300 else 1301 err = -ENOMEM; 1302 if (err) { 1303 *bad_wr = wr; 1304 break; 1305 } 1306 1307 qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].wr_id = wr->wr_id; 1308 if (c4iw_wr_log) { 1309 qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].sge_ts = 1310 cxgb4_read_sge_timestamp( 1311 qhp->rhp->rdev.lldi.ports[0]); 1312 qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].host_time = 1313 ktime_get(); 1314 } 1315 1316 wqe->recv.opcode = FW_RI_RECV_WR; 1317 wqe->recv.r1 = 0; 1318 wqe->recv.wrid = qhp->wq.rq.pidx; 1319 wqe->recv.r2[0] = 0; 1320 wqe->recv.r2[1] = 0; 1321 wqe->recv.r2[2] = 0; 1322 wqe->recv.len16 = len16; 1323 pr_debug("cookie 0x%llx pidx %u\n", 1324 (unsigned long long)wr->wr_id, qhp->wq.rq.pidx); 1325 t4_rq_produce(&qhp->wq, len16); 1326 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); 1327 wr = wr->next; 1328 num_wrs--; 1329 } 1330 if (!qhp->rhp->rdev.status_page->db_off) { 1331 t4_ring_rq_db(&qhp->wq, idx, wqe); 1332 spin_unlock_irqrestore(&qhp->lock, flag); 1333 } else { 1334 spin_unlock_irqrestore(&qhp->lock, flag); 1335 ring_kernel_rq_db(qhp, idx); 1336 } 1337 return err; 1338 } 1339 1340 static void defer_srq_wr(struct t4_srq *srq, union t4_recv_wr *wqe, 1341 u64 wr_id, u8 len16) 1342 { 1343 struct t4_srq_pending_wr *pwr = &srq->pending_wrs[srq->pending_pidx]; 1344 1345 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", 1346 __func__, srq->cidx, srq->pidx, srq->wq_pidx, 1347 srq->in_use, srq->ooo_count, 1348 (unsigned long long)wr_id, srq->pending_cidx, 1349 srq->pending_pidx, srq->pending_in_use); 1350 pwr->wr_id = wr_id; 1351 pwr->len16 = len16; 1352 memcpy(&pwr->wqe, wqe, len16 * 16); 1353 t4_srq_produce_pending_wr(srq); 1354 } 1355 1356 int c4iw_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr, 1357 const struct ib_recv_wr **bad_wr) 1358 { 1359 union t4_recv_wr *wqe, lwqe; 1360 struct c4iw_srq *srq; 1361 unsigned long flag; 1362 u8 len16 = 0; 1363 u16 idx = 0; 1364 int err = 0; 1365 u32 num_wrs; 1366 1367 srq = to_c4iw_srq(ibsrq); 1368 spin_lock_irqsave(&srq->lock, flag); 1369 num_wrs = t4_srq_avail(&srq->wq); 1370 if (num_wrs == 0) { 1371 spin_unlock_irqrestore(&srq->lock, flag); 1372 return -ENOMEM; 1373 } 1374 while (wr) { 1375 if (wr->num_sge > T4_MAX_RECV_SGE) { 1376 err = -EINVAL; 1377 *bad_wr = wr; 1378 break; 1379 } 1380 wqe = &lwqe; 1381 if (num_wrs) 1382 err = build_srq_recv(wqe, wr, &len16); 1383 else 1384 err = -ENOMEM; 1385 if (err) { 1386 *bad_wr = wr; 1387 break; 1388 } 1389 1390 wqe->recv.opcode = FW_RI_RECV_WR; 1391 wqe->recv.r1 = 0; 1392 wqe->recv.wrid = srq->wq.pidx; 1393 wqe->recv.r2[0] = 0; 1394 wqe->recv.r2[1] = 0; 1395 wqe->recv.r2[2] = 0; 1396 wqe->recv.len16 = len16; 1397 1398 if (srq->wq.ooo_count || 1399 srq->wq.pending_in_use || 1400 srq->wq.sw_rq[srq->wq.pidx].valid) { 1401 defer_srq_wr(&srq->wq, wqe, wr->wr_id, len16); 1402 } else { 1403 srq->wq.sw_rq[srq->wq.pidx].wr_id = wr->wr_id; 1404 srq->wq.sw_rq[srq->wq.pidx].valid = 1; 1405 c4iw_copy_wr_to_srq(&srq->wq, wqe, len16); 1406 pr_debug("%s cidx %u pidx %u wq_pidx %u in_use %u wr_id 0x%llx\n", 1407 __func__, srq->wq.cidx, 1408 srq->wq.pidx, srq->wq.wq_pidx, 1409 srq->wq.in_use, 1410 (unsigned long long)wr->wr_id); 1411 t4_srq_produce(&srq->wq, len16); 1412 idx += DIV_ROUND_UP(len16 * 16, T4_EQ_ENTRY_SIZE); 1413 } 1414 wr = wr->next; 1415 num_wrs--; 1416 } 1417 if (idx) 1418 t4_ring_srq_db(&srq->wq, idx, len16, wqe); 1419 spin_unlock_irqrestore(&srq->lock, flag); 1420 return err; 1421 } 1422 1423 static inline void build_term_codes(struct t4_cqe *err_cqe, u8 *layer_type, 1424 u8 *ecode) 1425 { 1426 int status; 1427 int tagged; 1428 int opcode; 1429 int rqtype; 1430 int send_inv; 1431 1432 if (!err_cqe) { 1433 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA; 1434 *ecode = 0; 1435 return; 1436 } 1437 1438 status = CQE_STATUS(err_cqe); 1439 opcode = CQE_OPCODE(err_cqe); 1440 rqtype = RQ_TYPE(err_cqe); 1441 send_inv = (opcode == FW_RI_SEND_WITH_INV) || 1442 (opcode == FW_RI_SEND_WITH_SE_INV); 1443 tagged = (opcode == FW_RI_RDMA_WRITE) || 1444 (rqtype && (opcode == FW_RI_READ_RESP)); 1445 1446 switch (status) { 1447 case T4_ERR_STAG: 1448 if (send_inv) { 1449 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 1450 *ecode = RDMAP_CANT_INV_STAG; 1451 } else { 1452 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1453 *ecode = RDMAP_INV_STAG; 1454 } 1455 break; 1456 case T4_ERR_PDID: 1457 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1458 if ((opcode == FW_RI_SEND_WITH_INV) || 1459 (opcode == FW_RI_SEND_WITH_SE_INV)) 1460 *ecode = RDMAP_CANT_INV_STAG; 1461 else 1462 *ecode = RDMAP_STAG_NOT_ASSOC; 1463 break; 1464 case T4_ERR_QPID: 1465 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1466 *ecode = RDMAP_STAG_NOT_ASSOC; 1467 break; 1468 case T4_ERR_ACCESS: 1469 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1470 *ecode = RDMAP_ACC_VIOL; 1471 break; 1472 case T4_ERR_WRAP: 1473 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1474 *ecode = RDMAP_TO_WRAP; 1475 break; 1476 case T4_ERR_BOUND: 1477 if (tagged) { 1478 *layer_type = LAYER_DDP|DDP_TAGGED_ERR; 1479 *ecode = DDPT_BASE_BOUNDS; 1480 } else { 1481 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1482 *ecode = RDMAP_BASE_BOUNDS; 1483 } 1484 break; 1485 case T4_ERR_INVALIDATE_SHARED_MR: 1486 case T4_ERR_INVALIDATE_MR_WITH_MW_BOUND: 1487 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 1488 *ecode = RDMAP_CANT_INV_STAG; 1489 break; 1490 case T4_ERR_ECC: 1491 case T4_ERR_ECC_PSTAG: 1492 case T4_ERR_INTERNAL_ERR: 1493 *layer_type = LAYER_RDMAP|RDMAP_LOCAL_CATA; 1494 *ecode = 0; 1495 break; 1496 case T4_ERR_OUT_OF_RQE: 1497 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1498 *ecode = DDPU_INV_MSN_NOBUF; 1499 break; 1500 case T4_ERR_PBL_ADDR_BOUND: 1501 *layer_type = LAYER_DDP|DDP_TAGGED_ERR; 1502 *ecode = DDPT_BASE_BOUNDS; 1503 break; 1504 case T4_ERR_CRC: 1505 *layer_type = LAYER_MPA|DDP_LLP; 1506 *ecode = MPA_CRC_ERR; 1507 break; 1508 case T4_ERR_MARKER: 1509 *layer_type = LAYER_MPA|DDP_LLP; 1510 *ecode = MPA_MARKER_ERR; 1511 break; 1512 case T4_ERR_PDU_LEN_ERR: 1513 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1514 *ecode = DDPU_MSG_TOOBIG; 1515 break; 1516 case T4_ERR_DDP_VERSION: 1517 if (tagged) { 1518 *layer_type = LAYER_DDP|DDP_TAGGED_ERR; 1519 *ecode = DDPT_INV_VERS; 1520 } else { 1521 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1522 *ecode = DDPU_INV_VERS; 1523 } 1524 break; 1525 case T4_ERR_RDMA_VERSION: 1526 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 1527 *ecode = RDMAP_INV_VERS; 1528 break; 1529 case T4_ERR_OPCODE: 1530 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 1531 *ecode = RDMAP_INV_OPCODE; 1532 break; 1533 case T4_ERR_DDP_QUEUE_NUM: 1534 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1535 *ecode = DDPU_INV_QN; 1536 break; 1537 case T4_ERR_MSN: 1538 case T4_ERR_MSN_GAP: 1539 case T4_ERR_MSN_RANGE: 1540 case T4_ERR_IRD_OVERFLOW: 1541 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1542 *ecode = DDPU_INV_MSN_RANGE; 1543 break; 1544 case T4_ERR_TBIT: 1545 *layer_type = LAYER_DDP|DDP_LOCAL_CATA; 1546 *ecode = 0; 1547 break; 1548 case T4_ERR_MO: 1549 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1550 *ecode = DDPU_INV_MO; 1551 break; 1552 default: 1553 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA; 1554 *ecode = 0; 1555 break; 1556 } 1557 } 1558 1559 static void post_terminate(struct c4iw_qp *qhp, struct t4_cqe *err_cqe, 1560 gfp_t gfp) 1561 { 1562 struct fw_ri_wr *wqe; 1563 struct sk_buff *skb; 1564 struct terminate_message *term; 1565 1566 pr_debug("qhp %p qid 0x%x tid %u\n", qhp, qhp->wq.sq.qid, 1567 qhp->ep->hwtid); 1568 1569 skb = skb_dequeue(&qhp->ep->com.ep_skb_list); 1570 if (WARN_ON(!skb)) 1571 return; 1572 1573 set_wr_txq(skb, CPL_PRIORITY_DATA, qhp->ep->txq_idx); 1574 1575 wqe = __skb_put_zero(skb, sizeof(*wqe)); 1576 wqe->op_compl = cpu_to_be32(FW_WR_OP_V(FW_RI_INIT_WR)); 1577 wqe->flowid_len16 = cpu_to_be32( 1578 FW_WR_FLOWID_V(qhp->ep->hwtid) | 1579 FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*wqe), 16))); 1580 1581 wqe->u.terminate.type = FW_RI_TYPE_TERMINATE; 1582 wqe->u.terminate.immdlen = cpu_to_be32(sizeof(*term)); 1583 term = (struct terminate_message *)wqe->u.terminate.termmsg; 1584 if (qhp->attr.layer_etype == (LAYER_MPA|DDP_LLP)) { 1585 term->layer_etype = qhp->attr.layer_etype; 1586 term->ecode = qhp->attr.ecode; 1587 } else 1588 build_term_codes(err_cqe, &term->layer_etype, &term->ecode); 1589 c4iw_ofld_send(&qhp->rhp->rdev, skb); 1590 } 1591 1592 /* 1593 * Assumes qhp lock is held. 1594 */ 1595 static void __flush_qp(struct c4iw_qp *qhp, struct c4iw_cq *rchp, 1596 struct c4iw_cq *schp) 1597 { 1598 int count; 1599 int rq_flushed = 0, sq_flushed; 1600 unsigned long flag; 1601 1602 pr_debug("qhp %p rchp %p schp %p\n", qhp, rchp, schp); 1603 1604 /* locking hierarchy: cqs lock first, then qp lock. */ 1605 spin_lock_irqsave(&rchp->lock, flag); 1606 if (schp != rchp) 1607 spin_lock(&schp->lock); 1608 spin_lock(&qhp->lock); 1609 1610 if (qhp->wq.flushed) { 1611 spin_unlock(&qhp->lock); 1612 if (schp != rchp) 1613 spin_unlock(&schp->lock); 1614 spin_unlock_irqrestore(&rchp->lock, flag); 1615 return; 1616 } 1617 qhp->wq.flushed = 1; 1618 t4_set_wq_in_error(&qhp->wq, 0); 1619 1620 c4iw_flush_hw_cq(rchp, qhp); 1621 if (!qhp->srq) { 1622 c4iw_count_rcqes(&rchp->cq, &qhp->wq, &count); 1623 rq_flushed = c4iw_flush_rq(&qhp->wq, &rchp->cq, count); 1624 } 1625 1626 if (schp != rchp) 1627 c4iw_flush_hw_cq(schp, qhp); 1628 sq_flushed = c4iw_flush_sq(qhp); 1629 1630 spin_unlock(&qhp->lock); 1631 if (schp != rchp) 1632 spin_unlock(&schp->lock); 1633 spin_unlock_irqrestore(&rchp->lock, flag); 1634 1635 if (schp == rchp) { 1636 if ((rq_flushed || sq_flushed) && 1637 t4_clear_cq_armed(&rchp->cq)) { 1638 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 1639 (*rchp->ibcq.comp_handler)(&rchp->ibcq, 1640 rchp->ibcq.cq_context); 1641 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 1642 } 1643 } else { 1644 if (rq_flushed && t4_clear_cq_armed(&rchp->cq)) { 1645 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 1646 (*rchp->ibcq.comp_handler)(&rchp->ibcq, 1647 rchp->ibcq.cq_context); 1648 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 1649 } 1650 if (sq_flushed && t4_clear_cq_armed(&schp->cq)) { 1651 spin_lock_irqsave(&schp->comp_handler_lock, flag); 1652 (*schp->ibcq.comp_handler)(&schp->ibcq, 1653 schp->ibcq.cq_context); 1654 spin_unlock_irqrestore(&schp->comp_handler_lock, flag); 1655 } 1656 } 1657 } 1658 1659 static void flush_qp(struct c4iw_qp *qhp) 1660 { 1661 struct c4iw_cq *rchp, *schp; 1662 unsigned long flag; 1663 1664 rchp = to_c4iw_cq(qhp->ibqp.recv_cq); 1665 schp = to_c4iw_cq(qhp->ibqp.send_cq); 1666 1667 if (qhp->ibqp.uobject) { 1668 1669 /* for user qps, qhp->wq.flushed is protected by qhp->mutex */ 1670 if (qhp->wq.flushed) 1671 return; 1672 1673 qhp->wq.flushed = 1; 1674 t4_set_wq_in_error(&qhp->wq, 0); 1675 t4_set_cq_in_error(&rchp->cq); 1676 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 1677 (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context); 1678 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 1679 if (schp != rchp) { 1680 t4_set_cq_in_error(&schp->cq); 1681 spin_lock_irqsave(&schp->comp_handler_lock, flag); 1682 (*schp->ibcq.comp_handler)(&schp->ibcq, 1683 schp->ibcq.cq_context); 1684 spin_unlock_irqrestore(&schp->comp_handler_lock, flag); 1685 } 1686 return; 1687 } 1688 __flush_qp(qhp, rchp, schp); 1689 } 1690 1691 static int rdma_fini(struct c4iw_dev *rhp, struct c4iw_qp *qhp, 1692 struct c4iw_ep *ep) 1693 { 1694 struct fw_ri_wr *wqe; 1695 int ret; 1696 struct sk_buff *skb; 1697 1698 pr_debug("qhp %p qid 0x%x tid %u\n", qhp, qhp->wq.sq.qid, ep->hwtid); 1699 1700 skb = skb_dequeue(&ep->com.ep_skb_list); 1701 if (WARN_ON(!skb)) 1702 return -ENOMEM; 1703 1704 set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); 1705 1706 wqe = __skb_put_zero(skb, sizeof(*wqe)); 1707 wqe->op_compl = cpu_to_be32( 1708 FW_WR_OP_V(FW_RI_INIT_WR) | 1709 FW_WR_COMPL_F); 1710 wqe->flowid_len16 = cpu_to_be32( 1711 FW_WR_FLOWID_V(ep->hwtid) | 1712 FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*wqe), 16))); 1713 wqe->cookie = (uintptr_t)ep->com.wr_waitp; 1714 1715 wqe->u.fini.type = FW_RI_TYPE_FINI; 1716 1717 ret = c4iw_ref_send_wait(&rhp->rdev, skb, ep->com.wr_waitp, 1718 qhp->ep->hwtid, qhp->wq.sq.qid, __func__); 1719 1720 pr_debug("ret %d\n", ret); 1721 return ret; 1722 } 1723 1724 static void build_rtr_msg(u8 p2p_type, struct fw_ri_init *init) 1725 { 1726 pr_debug("p2p_type = %d\n", p2p_type); 1727 memset(&init->u, 0, sizeof(init->u)); 1728 switch (p2p_type) { 1729 case FW_RI_INIT_P2PTYPE_RDMA_WRITE: 1730 init->u.write.opcode = FW_RI_RDMA_WRITE_WR; 1731 init->u.write.stag_sink = cpu_to_be32(1); 1732 init->u.write.to_sink = cpu_to_be64(1); 1733 init->u.write.u.immd_src[0].op = FW_RI_DATA_IMMD; 1734 init->u.write.len16 = DIV_ROUND_UP( 1735 sizeof(init->u.write) + sizeof(struct fw_ri_immd), 16); 1736 break; 1737 case FW_RI_INIT_P2PTYPE_READ_REQ: 1738 init->u.write.opcode = FW_RI_RDMA_READ_WR; 1739 init->u.read.stag_src = cpu_to_be32(1); 1740 init->u.read.to_src_lo = cpu_to_be32(1); 1741 init->u.read.stag_sink = cpu_to_be32(1); 1742 init->u.read.to_sink_lo = cpu_to_be32(1); 1743 init->u.read.len16 = DIV_ROUND_UP(sizeof(init->u.read), 16); 1744 break; 1745 } 1746 } 1747 1748 static int rdma_init(struct c4iw_dev *rhp, struct c4iw_qp *qhp) 1749 { 1750 struct fw_ri_wr *wqe; 1751 int ret; 1752 struct sk_buff *skb; 1753 1754 pr_debug("qhp %p qid 0x%x tid %u ird %u ord %u\n", qhp, 1755 qhp->wq.sq.qid, qhp->ep->hwtid, qhp->ep->ird, qhp->ep->ord); 1756 1757 skb = alloc_skb(sizeof(*wqe), GFP_KERNEL); 1758 if (!skb) { 1759 ret = -ENOMEM; 1760 goto out; 1761 } 1762 ret = alloc_ird(rhp, qhp->attr.max_ird); 1763 if (ret) { 1764 qhp->attr.max_ird = 0; 1765 kfree_skb(skb); 1766 goto out; 1767 } 1768 set_wr_txq(skb, CPL_PRIORITY_DATA, qhp->ep->txq_idx); 1769 1770 wqe = __skb_put_zero(skb, sizeof(*wqe)); 1771 wqe->op_compl = cpu_to_be32( 1772 FW_WR_OP_V(FW_RI_INIT_WR) | 1773 FW_WR_COMPL_F); 1774 wqe->flowid_len16 = cpu_to_be32( 1775 FW_WR_FLOWID_V(qhp->ep->hwtid) | 1776 FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*wqe), 16))); 1777 1778 wqe->cookie = (uintptr_t)qhp->ep->com.wr_waitp; 1779 1780 wqe->u.init.type = FW_RI_TYPE_INIT; 1781 wqe->u.init.mpareqbit_p2ptype = 1782 FW_RI_WR_MPAREQBIT_V(qhp->attr.mpa_attr.initiator) | 1783 FW_RI_WR_P2PTYPE_V(qhp->attr.mpa_attr.p2p_type); 1784 wqe->u.init.mpa_attrs = FW_RI_MPA_IETF_ENABLE; 1785 if (qhp->attr.mpa_attr.recv_marker_enabled) 1786 wqe->u.init.mpa_attrs |= FW_RI_MPA_RX_MARKER_ENABLE; 1787 if (qhp->attr.mpa_attr.xmit_marker_enabled) 1788 wqe->u.init.mpa_attrs |= FW_RI_MPA_TX_MARKER_ENABLE; 1789 if (qhp->attr.mpa_attr.crc_enabled) 1790 wqe->u.init.mpa_attrs |= FW_RI_MPA_CRC_ENABLE; 1791 1792 wqe->u.init.qp_caps = FW_RI_QP_RDMA_READ_ENABLE | 1793 FW_RI_QP_RDMA_WRITE_ENABLE | 1794 FW_RI_QP_BIND_ENABLE; 1795 if (!qhp->ibqp.uobject) 1796 wqe->u.init.qp_caps |= FW_RI_QP_FAST_REGISTER_ENABLE | 1797 FW_RI_QP_STAG0_ENABLE; 1798 wqe->u.init.nrqe = cpu_to_be16(t4_rqes_posted(&qhp->wq)); 1799 wqe->u.init.pdid = cpu_to_be32(qhp->attr.pd); 1800 wqe->u.init.qpid = cpu_to_be32(qhp->wq.sq.qid); 1801 wqe->u.init.sq_eqid = cpu_to_be32(qhp->wq.sq.qid); 1802 if (qhp->srq) { 1803 wqe->u.init.rq_eqid = cpu_to_be32(FW_RI_INIT_RQEQID_SRQ | 1804 qhp->srq->idx); 1805 } else { 1806 wqe->u.init.rq_eqid = cpu_to_be32(qhp->wq.rq.qid); 1807 wqe->u.init.hwrqsize = cpu_to_be32(qhp->wq.rq.rqt_size); 1808 wqe->u.init.hwrqaddr = cpu_to_be32(qhp->wq.rq.rqt_hwaddr - 1809 rhp->rdev.lldi.vr->rq.start); 1810 } 1811 wqe->u.init.scqid = cpu_to_be32(qhp->attr.scq); 1812 wqe->u.init.rcqid = cpu_to_be32(qhp->attr.rcq); 1813 wqe->u.init.ord_max = cpu_to_be32(qhp->attr.max_ord); 1814 wqe->u.init.ird_max = cpu_to_be32(qhp->attr.max_ird); 1815 wqe->u.init.iss = cpu_to_be32(qhp->ep->snd_seq); 1816 wqe->u.init.irs = cpu_to_be32(qhp->ep->rcv_seq); 1817 if (qhp->attr.mpa_attr.initiator) 1818 build_rtr_msg(qhp->attr.mpa_attr.p2p_type, &wqe->u.init); 1819 1820 ret = c4iw_ref_send_wait(&rhp->rdev, skb, qhp->ep->com.wr_waitp, 1821 qhp->ep->hwtid, qhp->wq.sq.qid, __func__); 1822 if (!ret) 1823 goto out; 1824 1825 free_ird(rhp, qhp->attr.max_ird); 1826 out: 1827 pr_debug("ret %d\n", ret); 1828 return ret; 1829 } 1830 1831 int c4iw_modify_qp(struct c4iw_dev *rhp, struct c4iw_qp *qhp, 1832 enum c4iw_qp_attr_mask mask, 1833 struct c4iw_qp_attributes *attrs, 1834 int internal) 1835 { 1836 int ret = 0; 1837 struct c4iw_qp_attributes newattr = qhp->attr; 1838 int disconnect = 0; 1839 int terminate = 0; 1840 int abort = 0; 1841 int free = 0; 1842 struct c4iw_ep *ep = NULL; 1843 1844 pr_debug("qhp %p sqid 0x%x rqid 0x%x ep %p state %d -> %d\n", 1845 qhp, qhp->wq.sq.qid, qhp->wq.rq.qid, qhp->ep, qhp->attr.state, 1846 (mask & C4IW_QP_ATTR_NEXT_STATE) ? attrs->next_state : -1); 1847 1848 mutex_lock(&qhp->mutex); 1849 1850 /* Process attr changes if in IDLE */ 1851 if (mask & C4IW_QP_ATTR_VALID_MODIFY) { 1852 if (qhp->attr.state != C4IW_QP_STATE_IDLE) { 1853 ret = -EIO; 1854 goto out; 1855 } 1856 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_READ) 1857 newattr.enable_rdma_read = attrs->enable_rdma_read; 1858 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_WRITE) 1859 newattr.enable_rdma_write = attrs->enable_rdma_write; 1860 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_BIND) 1861 newattr.enable_bind = attrs->enable_bind; 1862 if (mask & C4IW_QP_ATTR_MAX_ORD) { 1863 if (attrs->max_ord > c4iw_max_read_depth) { 1864 ret = -EINVAL; 1865 goto out; 1866 } 1867 newattr.max_ord = attrs->max_ord; 1868 } 1869 if (mask & C4IW_QP_ATTR_MAX_IRD) { 1870 if (attrs->max_ird > cur_max_read_depth(rhp)) { 1871 ret = -EINVAL; 1872 goto out; 1873 } 1874 newattr.max_ird = attrs->max_ird; 1875 } 1876 qhp->attr = newattr; 1877 } 1878 1879 if (mask & C4IW_QP_ATTR_SQ_DB) { 1880 ret = ring_kernel_sq_db(qhp, attrs->sq_db_inc); 1881 goto out; 1882 } 1883 if (mask & C4IW_QP_ATTR_RQ_DB) { 1884 ret = ring_kernel_rq_db(qhp, attrs->rq_db_inc); 1885 goto out; 1886 } 1887 1888 if (!(mask & C4IW_QP_ATTR_NEXT_STATE)) 1889 goto out; 1890 if (qhp->attr.state == attrs->next_state) 1891 goto out; 1892 1893 switch (qhp->attr.state) { 1894 case C4IW_QP_STATE_IDLE: 1895 switch (attrs->next_state) { 1896 case C4IW_QP_STATE_RTS: 1897 if (!(mask & C4IW_QP_ATTR_LLP_STREAM_HANDLE)) { 1898 ret = -EINVAL; 1899 goto out; 1900 } 1901 if (!(mask & C4IW_QP_ATTR_MPA_ATTR)) { 1902 ret = -EINVAL; 1903 goto out; 1904 } 1905 qhp->attr.mpa_attr = attrs->mpa_attr; 1906 qhp->attr.llp_stream_handle = attrs->llp_stream_handle; 1907 qhp->ep = qhp->attr.llp_stream_handle; 1908 set_state(qhp, C4IW_QP_STATE_RTS); 1909 1910 /* 1911 * Ref the endpoint here and deref when we 1912 * disassociate the endpoint from the QP. This 1913 * happens in CLOSING->IDLE transition or *->ERROR 1914 * transition. 1915 */ 1916 c4iw_get_ep(&qhp->ep->com); 1917 ret = rdma_init(rhp, qhp); 1918 if (ret) 1919 goto err; 1920 break; 1921 case C4IW_QP_STATE_ERROR: 1922 set_state(qhp, C4IW_QP_STATE_ERROR); 1923 flush_qp(qhp); 1924 break; 1925 default: 1926 ret = -EINVAL; 1927 goto out; 1928 } 1929 break; 1930 case C4IW_QP_STATE_RTS: 1931 switch (attrs->next_state) { 1932 case C4IW_QP_STATE_CLOSING: 1933 t4_set_wq_in_error(&qhp->wq, 0); 1934 set_state(qhp, C4IW_QP_STATE_CLOSING); 1935 ep = qhp->ep; 1936 if (!internal) { 1937 abort = 0; 1938 disconnect = 1; 1939 c4iw_get_ep(&qhp->ep->com); 1940 } 1941 ret = rdma_fini(rhp, qhp, ep); 1942 if (ret) 1943 goto err; 1944 break; 1945 case C4IW_QP_STATE_TERMINATE: 1946 t4_set_wq_in_error(&qhp->wq, 0); 1947 set_state(qhp, C4IW_QP_STATE_TERMINATE); 1948 qhp->attr.layer_etype = attrs->layer_etype; 1949 qhp->attr.ecode = attrs->ecode; 1950 ep = qhp->ep; 1951 if (!internal) { 1952 c4iw_get_ep(&ep->com); 1953 terminate = 1; 1954 disconnect = 1; 1955 } else { 1956 terminate = qhp->attr.send_term; 1957 ret = rdma_fini(rhp, qhp, ep); 1958 if (ret) 1959 goto err; 1960 } 1961 break; 1962 case C4IW_QP_STATE_ERROR: 1963 t4_set_wq_in_error(&qhp->wq, 0); 1964 set_state(qhp, C4IW_QP_STATE_ERROR); 1965 if (!internal) { 1966 abort = 1; 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 2107 kfree(qhp); 2108 return 0; 2109 } 2110 2111 struct ib_qp *c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs, 2112 struct ib_udata *udata) 2113 { 2114 struct c4iw_dev *rhp; 2115 struct c4iw_qp *qhp; 2116 struct c4iw_pd *php; 2117 struct c4iw_cq *schp; 2118 struct c4iw_cq *rchp; 2119 struct c4iw_create_qp_resp uresp; 2120 unsigned int sqsize, rqsize = 0; 2121 struct c4iw_ucontext *ucontext = rdma_udata_to_drv_context( 2122 udata, struct c4iw_ucontext, ibucontext); 2123 int ret; 2124 struct c4iw_mm_entry *sq_key_mm, *rq_key_mm = NULL, *sq_db_key_mm; 2125 struct c4iw_mm_entry *rq_db_key_mm = NULL, *ma_sync_key_mm = NULL; 2126 2127 pr_debug("ib_pd %p\n", pd); 2128 2129 if (attrs->qp_type != IB_QPT_RC) 2130 return ERR_PTR(-EOPNOTSUPP); 2131 2132 php = to_c4iw_pd(pd); 2133 rhp = php->rhp; 2134 schp = get_chp(rhp, ((struct c4iw_cq *)attrs->send_cq)->cq.cqid); 2135 rchp = get_chp(rhp, ((struct c4iw_cq *)attrs->recv_cq)->cq.cqid); 2136 if (!schp || !rchp) 2137 return ERR_PTR(-EINVAL); 2138 2139 if (attrs->cap.max_inline_data > T4_MAX_SEND_INLINE) 2140 return ERR_PTR(-EINVAL); 2141 2142 if (!attrs->srq) { 2143 if (attrs->cap.max_recv_wr > rhp->rdev.hw_queue.t4_max_rq_size) 2144 return ERR_PTR(-E2BIG); 2145 rqsize = attrs->cap.max_recv_wr + 1; 2146 if (rqsize < 8) 2147 rqsize = 8; 2148 } 2149 2150 if (attrs->cap.max_send_wr > rhp->rdev.hw_queue.t4_max_sq_size) 2151 return ERR_PTR(-E2BIG); 2152 sqsize = attrs->cap.max_send_wr + 1; 2153 if (sqsize < 8) 2154 sqsize = 8; 2155 2156 qhp = kzalloc(sizeof(*qhp), GFP_KERNEL); 2157 if (!qhp) 2158 return ERR_PTR(-ENOMEM); 2159 2160 qhp->wr_waitp = c4iw_alloc_wr_wait(GFP_KERNEL); 2161 if (!qhp->wr_waitp) { 2162 ret = -ENOMEM; 2163 goto err_free_qhp; 2164 } 2165 2166 qhp->wq.sq.size = sqsize; 2167 qhp->wq.sq.memsize = 2168 (sqsize + rhp->rdev.hw_queue.t4_eq_status_entries) * 2169 sizeof(*qhp->wq.sq.queue) + 16 * sizeof(__be64); 2170 qhp->wq.sq.flush_cidx = -1; 2171 if (!attrs->srq) { 2172 qhp->wq.rq.size = rqsize; 2173 qhp->wq.rq.memsize = 2174 (rqsize + rhp->rdev.hw_queue.t4_eq_status_entries) * 2175 sizeof(*qhp->wq.rq.queue); 2176 } 2177 2178 if (ucontext) { 2179 qhp->wq.sq.memsize = roundup(qhp->wq.sq.memsize, PAGE_SIZE); 2180 if (!attrs->srq) 2181 qhp->wq.rq.memsize = 2182 roundup(qhp->wq.rq.memsize, PAGE_SIZE); 2183 } 2184 2185 ret = create_qp(&rhp->rdev, &qhp->wq, &schp->cq, &rchp->cq, 2186 ucontext ? &ucontext->uctx : &rhp->rdev.uctx, 2187 qhp->wr_waitp, !attrs->srq); 2188 if (ret) 2189 goto err_free_wr_wait; 2190 2191 attrs->cap.max_recv_wr = rqsize - 1; 2192 attrs->cap.max_send_wr = sqsize - 1; 2193 attrs->cap.max_inline_data = T4_MAX_SEND_INLINE; 2194 2195 qhp->rhp = rhp; 2196 qhp->attr.pd = php->pdid; 2197 qhp->attr.scq = ((struct c4iw_cq *) attrs->send_cq)->cq.cqid; 2198 qhp->attr.rcq = ((struct c4iw_cq *) attrs->recv_cq)->cq.cqid; 2199 qhp->attr.sq_num_entries = attrs->cap.max_send_wr; 2200 qhp->attr.sq_max_sges = attrs->cap.max_send_sge; 2201 qhp->attr.sq_max_sges_rdma_write = attrs->cap.max_send_sge; 2202 if (!attrs->srq) { 2203 qhp->attr.rq_num_entries = attrs->cap.max_recv_wr; 2204 qhp->attr.rq_max_sges = attrs->cap.max_recv_sge; 2205 } 2206 qhp->attr.state = C4IW_QP_STATE_IDLE; 2207 qhp->attr.next_state = C4IW_QP_STATE_IDLE; 2208 qhp->attr.enable_rdma_read = 1; 2209 qhp->attr.enable_rdma_write = 1; 2210 qhp->attr.enable_bind = 1; 2211 qhp->attr.max_ord = 0; 2212 qhp->attr.max_ird = 0; 2213 qhp->sq_sig_all = attrs->sq_sig_type == IB_SIGNAL_ALL_WR; 2214 spin_lock_init(&qhp->lock); 2215 mutex_init(&qhp->mutex); 2216 init_waitqueue_head(&qhp->wait); 2217 init_completion(&qhp->qp_rel_comp); 2218 refcount_set(&qhp->qp_refcnt, 1); 2219 2220 ret = xa_insert_irq(&rhp->qps, qhp->wq.sq.qid, qhp, GFP_KERNEL); 2221 if (ret) 2222 goto err_destroy_qp; 2223 2224 if (udata && ucontext) { 2225 sq_key_mm = kmalloc(sizeof(*sq_key_mm), GFP_KERNEL); 2226 if (!sq_key_mm) { 2227 ret = -ENOMEM; 2228 goto err_remove_handle; 2229 } 2230 if (!attrs->srq) { 2231 rq_key_mm = kmalloc(sizeof(*rq_key_mm), GFP_KERNEL); 2232 if (!rq_key_mm) { 2233 ret = -ENOMEM; 2234 goto err_free_sq_key; 2235 } 2236 } 2237 sq_db_key_mm = kmalloc(sizeof(*sq_db_key_mm), GFP_KERNEL); 2238 if (!sq_db_key_mm) { 2239 ret = -ENOMEM; 2240 goto err_free_rq_key; 2241 } 2242 if (!attrs->srq) { 2243 rq_db_key_mm = 2244 kmalloc(sizeof(*rq_db_key_mm), GFP_KERNEL); 2245 if (!rq_db_key_mm) { 2246 ret = -ENOMEM; 2247 goto err_free_sq_db_key; 2248 } 2249 } 2250 memset(&uresp, 0, sizeof(uresp)); 2251 if (t4_sq_onchip(&qhp->wq.sq)) { 2252 ma_sync_key_mm = kmalloc(sizeof(*ma_sync_key_mm), 2253 GFP_KERNEL); 2254 if (!ma_sync_key_mm) { 2255 ret = -ENOMEM; 2256 goto err_free_rq_db_key; 2257 } 2258 uresp.flags = C4IW_QPF_ONCHIP; 2259 } 2260 if (rhp->rdev.lldi.write_w_imm_support) 2261 uresp.flags |= C4IW_QPF_WRITE_W_IMM; 2262 uresp.qid_mask = rhp->rdev.qpmask; 2263 uresp.sqid = qhp->wq.sq.qid; 2264 uresp.sq_size = qhp->wq.sq.size; 2265 uresp.sq_memsize = qhp->wq.sq.memsize; 2266 if (!attrs->srq) { 2267 uresp.rqid = qhp->wq.rq.qid; 2268 uresp.rq_size = qhp->wq.rq.size; 2269 uresp.rq_memsize = qhp->wq.rq.memsize; 2270 } 2271 spin_lock(&ucontext->mmap_lock); 2272 if (ma_sync_key_mm) { 2273 uresp.ma_sync_key = ucontext->key; 2274 ucontext->key += PAGE_SIZE; 2275 } 2276 uresp.sq_key = ucontext->key; 2277 ucontext->key += PAGE_SIZE; 2278 if (!attrs->srq) { 2279 uresp.rq_key = ucontext->key; 2280 ucontext->key += PAGE_SIZE; 2281 } 2282 uresp.sq_db_gts_key = ucontext->key; 2283 ucontext->key += PAGE_SIZE; 2284 if (!attrs->srq) { 2285 uresp.rq_db_gts_key = ucontext->key; 2286 ucontext->key += PAGE_SIZE; 2287 } 2288 spin_unlock(&ucontext->mmap_lock); 2289 ret = ib_copy_to_udata(udata, &uresp, sizeof(uresp)); 2290 if (ret) 2291 goto err_free_ma_sync_key; 2292 sq_key_mm->key = uresp.sq_key; 2293 sq_key_mm->addr = qhp->wq.sq.phys_addr; 2294 sq_key_mm->len = PAGE_ALIGN(qhp->wq.sq.memsize); 2295 insert_mmap(ucontext, sq_key_mm); 2296 if (!attrs->srq) { 2297 rq_key_mm->key = uresp.rq_key; 2298 rq_key_mm->addr = virt_to_phys(qhp->wq.rq.queue); 2299 rq_key_mm->len = PAGE_ALIGN(qhp->wq.rq.memsize); 2300 insert_mmap(ucontext, rq_key_mm); 2301 } 2302 sq_db_key_mm->key = uresp.sq_db_gts_key; 2303 sq_db_key_mm->addr = (u64)(unsigned long)qhp->wq.sq.bar2_pa; 2304 sq_db_key_mm->len = PAGE_SIZE; 2305 insert_mmap(ucontext, sq_db_key_mm); 2306 if (!attrs->srq) { 2307 rq_db_key_mm->key = uresp.rq_db_gts_key; 2308 rq_db_key_mm->addr = 2309 (u64)(unsigned long)qhp->wq.rq.bar2_pa; 2310 rq_db_key_mm->len = PAGE_SIZE; 2311 insert_mmap(ucontext, rq_db_key_mm); 2312 } 2313 if (ma_sync_key_mm) { 2314 ma_sync_key_mm->key = uresp.ma_sync_key; 2315 ma_sync_key_mm->addr = 2316 (pci_resource_start(rhp->rdev.lldi.pdev, 0) + 2317 PCIE_MA_SYNC_A) & PAGE_MASK; 2318 ma_sync_key_mm->len = PAGE_SIZE; 2319 insert_mmap(ucontext, ma_sync_key_mm); 2320 } 2321 2322 qhp->ucontext = ucontext; 2323 } 2324 if (!attrs->srq) { 2325 qhp->wq.qp_errp = 2326 &qhp->wq.rq.queue[qhp->wq.rq.size].status.qp_err; 2327 } else { 2328 qhp->wq.qp_errp = 2329 &qhp->wq.sq.queue[qhp->wq.sq.size].status.qp_err; 2330 qhp->wq.srqidxp = 2331 &qhp->wq.sq.queue[qhp->wq.sq.size].status.srqidx; 2332 } 2333 2334 qhp->ibqp.qp_num = qhp->wq.sq.qid; 2335 if (attrs->srq) 2336 qhp->srq = to_c4iw_srq(attrs->srq); 2337 INIT_LIST_HEAD(&qhp->db_fc_entry); 2338 pr_debug("sq id %u size %u memsize %zu num_entries %u rq id %u size %u memsize %zu num_entries %u\n", 2339 qhp->wq.sq.qid, qhp->wq.sq.size, qhp->wq.sq.memsize, 2340 attrs->cap.max_send_wr, qhp->wq.rq.qid, qhp->wq.rq.size, 2341 qhp->wq.rq.memsize, attrs->cap.max_recv_wr); 2342 return &qhp->ibqp; 2343 err_free_ma_sync_key: 2344 kfree(ma_sync_key_mm); 2345 err_free_rq_db_key: 2346 if (!attrs->srq) 2347 kfree(rq_db_key_mm); 2348 err_free_sq_db_key: 2349 kfree(sq_db_key_mm); 2350 err_free_rq_key: 2351 if (!attrs->srq) 2352 kfree(rq_key_mm); 2353 err_free_sq_key: 2354 kfree(sq_key_mm); 2355 err_remove_handle: 2356 xa_erase_irq(&rhp->qps, qhp->wq.sq.qid); 2357 err_destroy_qp: 2358 destroy_qp(&rhp->rdev, &qhp->wq, 2359 ucontext ? &ucontext->uctx : &rhp->rdev.uctx, !attrs->srq); 2360 err_free_wr_wait: 2361 c4iw_put_wr_wait(qhp->wr_waitp); 2362 err_free_qhp: 2363 kfree(qhp); 2364 return ERR_PTR(ret); 2365 } 2366 2367 int c4iw_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 2368 int attr_mask, struct ib_udata *udata) 2369 { 2370 struct c4iw_dev *rhp; 2371 struct c4iw_qp *qhp; 2372 enum c4iw_qp_attr_mask mask = 0; 2373 struct c4iw_qp_attributes attrs = {}; 2374 2375 pr_debug("ib_qp %p\n", ibqp); 2376 2377 /* iwarp does not support the RTR state */ 2378 if ((attr_mask & IB_QP_STATE) && (attr->qp_state == IB_QPS_RTR)) 2379 attr_mask &= ~IB_QP_STATE; 2380 2381 /* Make sure we still have something left to do */ 2382 if (!attr_mask) 2383 return 0; 2384 2385 qhp = to_c4iw_qp(ibqp); 2386 rhp = qhp->rhp; 2387 2388 attrs.next_state = c4iw_convert_state(attr->qp_state); 2389 attrs.enable_rdma_read = (attr->qp_access_flags & 2390 IB_ACCESS_REMOTE_READ) ? 1 : 0; 2391 attrs.enable_rdma_write = (attr->qp_access_flags & 2392 IB_ACCESS_REMOTE_WRITE) ? 1 : 0; 2393 attrs.enable_bind = (attr->qp_access_flags & IB_ACCESS_MW_BIND) ? 1 : 0; 2394 2395 2396 mask |= (attr_mask & IB_QP_STATE) ? C4IW_QP_ATTR_NEXT_STATE : 0; 2397 mask |= (attr_mask & IB_QP_ACCESS_FLAGS) ? 2398 (C4IW_QP_ATTR_ENABLE_RDMA_READ | 2399 C4IW_QP_ATTR_ENABLE_RDMA_WRITE | 2400 C4IW_QP_ATTR_ENABLE_RDMA_BIND) : 0; 2401 2402 /* 2403 * Use SQ_PSN and RQ_PSN to pass in IDX_INC values for 2404 * ringing the queue db when we're in DB_FULL mode. 2405 * Only allow this on T4 devices. 2406 */ 2407 attrs.sq_db_inc = attr->sq_psn; 2408 attrs.rq_db_inc = attr->rq_psn; 2409 mask |= (attr_mask & IB_QP_SQ_PSN) ? C4IW_QP_ATTR_SQ_DB : 0; 2410 mask |= (attr_mask & IB_QP_RQ_PSN) ? C4IW_QP_ATTR_RQ_DB : 0; 2411 if (!is_t4(to_c4iw_qp(ibqp)->rhp->rdev.lldi.adapter_type) && 2412 (mask & (C4IW_QP_ATTR_SQ_DB|C4IW_QP_ATTR_RQ_DB))) 2413 return -EINVAL; 2414 2415 return c4iw_modify_qp(rhp, qhp, mask, &attrs, 0); 2416 } 2417 2418 struct ib_qp *c4iw_get_qp(struct ib_device *dev, int qpn) 2419 { 2420 pr_debug("ib_dev %p qpn 0x%x\n", dev, qpn); 2421 return (struct ib_qp *)get_qhp(to_c4iw_dev(dev), qpn); 2422 } 2423 2424 void c4iw_dispatch_srq_limit_reached_event(struct c4iw_srq *srq) 2425 { 2426 struct ib_event event = {}; 2427 2428 event.device = &srq->rhp->ibdev; 2429 event.element.srq = &srq->ibsrq; 2430 event.event = IB_EVENT_SRQ_LIMIT_REACHED; 2431 ib_dispatch_event(&event); 2432 } 2433 2434 int c4iw_modify_srq(struct ib_srq *ib_srq, struct ib_srq_attr *attr, 2435 enum ib_srq_attr_mask srq_attr_mask, 2436 struct ib_udata *udata) 2437 { 2438 struct c4iw_srq *srq = to_c4iw_srq(ib_srq); 2439 int ret = 0; 2440 2441 /* 2442 * XXX 0 mask == a SW interrupt for srq_limit reached... 2443 */ 2444 if (udata && !srq_attr_mask) { 2445 c4iw_dispatch_srq_limit_reached_event(srq); 2446 goto out; 2447 } 2448 2449 /* no support for this yet */ 2450 if (srq_attr_mask & IB_SRQ_MAX_WR) { 2451 ret = -EINVAL; 2452 goto out; 2453 } 2454 2455 if (!udata && (srq_attr_mask & IB_SRQ_LIMIT)) { 2456 srq->armed = true; 2457 srq->srq_limit = attr->srq_limit; 2458 } 2459 out: 2460 return ret; 2461 } 2462 2463 int c4iw_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 2464 int attr_mask, struct ib_qp_init_attr *init_attr) 2465 { 2466 struct c4iw_qp *qhp = to_c4iw_qp(ibqp); 2467 2468 memset(attr, 0, sizeof(*attr)); 2469 memset(init_attr, 0, sizeof(*init_attr)); 2470 attr->qp_state = to_ib_qp_state(qhp->attr.state); 2471 init_attr->cap.max_send_wr = qhp->attr.sq_num_entries; 2472 init_attr->cap.max_recv_wr = qhp->attr.rq_num_entries; 2473 init_attr->cap.max_send_sge = qhp->attr.sq_max_sges; 2474 init_attr->cap.max_recv_sge = qhp->attr.sq_max_sges; 2475 init_attr->cap.max_inline_data = T4_MAX_SEND_INLINE; 2476 init_attr->sq_sig_type = qhp->sq_sig_all ? IB_SIGNAL_ALL_WR : 0; 2477 return 0; 2478 } 2479 2480 static void free_srq_queue(struct c4iw_srq *srq, struct c4iw_dev_ucontext *uctx, 2481 struct c4iw_wr_wait *wr_waitp) 2482 { 2483 struct c4iw_rdev *rdev = &srq->rhp->rdev; 2484 struct sk_buff *skb = srq->destroy_skb; 2485 struct t4_srq *wq = &srq->wq; 2486 struct fw_ri_res_wr *res_wr; 2487 struct fw_ri_res *res; 2488 int wr_len; 2489 2490 wr_len = sizeof(*res_wr) + sizeof(*res); 2491 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0); 2492 2493 res_wr = (struct fw_ri_res_wr *)__skb_put(skb, wr_len); 2494 memset(res_wr, 0, wr_len); 2495 res_wr->op_nres = cpu_to_be32(FW_WR_OP_V(FW_RI_RES_WR) | 2496 FW_RI_RES_WR_NRES_V(1) | 2497 FW_WR_COMPL_F); 2498 res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16)); 2499 res_wr->cookie = (uintptr_t)wr_waitp; 2500 res = res_wr->res; 2501 res->u.srq.restype = FW_RI_RES_TYPE_SRQ; 2502 res->u.srq.op = FW_RI_RES_OP_RESET; 2503 res->u.srq.srqid = cpu_to_be32(srq->idx); 2504 res->u.srq.eqid = cpu_to_be32(wq->qid); 2505 2506 c4iw_init_wr_wait(wr_waitp); 2507 c4iw_ref_send_wait(rdev, skb, wr_waitp, 0, 0, __func__); 2508 2509 dma_free_coherent(&rdev->lldi.pdev->dev, 2510 wq->memsize, wq->queue, 2511 dma_unmap_addr(wq, mapping)); 2512 c4iw_rqtpool_free(rdev, wq->rqt_hwaddr, wq->rqt_size); 2513 kfree(wq->sw_rq); 2514 c4iw_put_qpid(rdev, wq->qid, uctx); 2515 } 2516 2517 static int alloc_srq_queue(struct c4iw_srq *srq, struct c4iw_dev_ucontext *uctx, 2518 struct c4iw_wr_wait *wr_waitp) 2519 { 2520 struct c4iw_rdev *rdev = &srq->rhp->rdev; 2521 int user = (uctx != &rdev->uctx); 2522 struct t4_srq *wq = &srq->wq; 2523 struct fw_ri_res_wr *res_wr; 2524 struct fw_ri_res *res; 2525 struct sk_buff *skb; 2526 int wr_len; 2527 int eqsize; 2528 int ret = -ENOMEM; 2529 2530 wq->qid = c4iw_get_qpid(rdev, uctx); 2531 if (!wq->qid) 2532 goto err; 2533 2534 if (!user) { 2535 wq->sw_rq = kcalloc(wq->size, sizeof(*wq->sw_rq), 2536 GFP_KERNEL); 2537 if (!wq->sw_rq) 2538 goto err_put_qpid; 2539 wq->pending_wrs = kcalloc(srq->wq.size, 2540 sizeof(*srq->wq.pending_wrs), 2541 GFP_KERNEL); 2542 if (!wq->pending_wrs) 2543 goto err_free_sw_rq; 2544 } 2545 2546 wq->rqt_size = wq->size; 2547 wq->rqt_hwaddr = c4iw_rqtpool_alloc(rdev, wq->rqt_size); 2548 if (!wq->rqt_hwaddr) 2549 goto err_free_pending_wrs; 2550 wq->rqt_abs_idx = (wq->rqt_hwaddr - rdev->lldi.vr->rq.start) >> 2551 T4_RQT_ENTRY_SHIFT; 2552 2553 wq->queue = dma_alloc_coherent(&rdev->lldi.pdev->dev, wq->memsize, 2554 &wq->dma_addr, GFP_KERNEL); 2555 if (!wq->queue) 2556 goto err_free_rqtpool; 2557 2558 dma_unmap_addr_set(wq, mapping, wq->dma_addr); 2559 2560 wq->bar2_va = c4iw_bar2_addrs(rdev, wq->qid, CXGB4_BAR2_QTYPE_EGRESS, 2561 &wq->bar2_qid, 2562 user ? &wq->bar2_pa : NULL); 2563 2564 /* 2565 * User mode must have bar2 access. 2566 */ 2567 2568 if (user && !wq->bar2_va) { 2569 pr_warn(MOD "%s: srqid %u not in BAR2 range.\n", 2570 pci_name(rdev->lldi.pdev), wq->qid); 2571 ret = -EINVAL; 2572 goto err_free_queue; 2573 } 2574 2575 /* build fw_ri_res_wr */ 2576 wr_len = sizeof(*res_wr) + sizeof(*res); 2577 2578 skb = alloc_skb(wr_len, GFP_KERNEL); 2579 if (!skb) 2580 goto err_free_queue; 2581 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0); 2582 2583 res_wr = (struct fw_ri_res_wr *)__skb_put(skb, wr_len); 2584 memset(res_wr, 0, wr_len); 2585 res_wr->op_nres = cpu_to_be32(FW_WR_OP_V(FW_RI_RES_WR) | 2586 FW_RI_RES_WR_NRES_V(1) | 2587 FW_WR_COMPL_F); 2588 res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16)); 2589 res_wr->cookie = (uintptr_t)wr_waitp; 2590 res = res_wr->res; 2591 res->u.srq.restype = FW_RI_RES_TYPE_SRQ; 2592 res->u.srq.op = FW_RI_RES_OP_WRITE; 2593 2594 /* 2595 * eqsize is the number of 64B entries plus the status page size. 2596 */ 2597 eqsize = wq->size * T4_RQ_NUM_SLOTS + 2598 rdev->hw_queue.t4_eq_status_entries; 2599 res->u.srq.eqid = cpu_to_be32(wq->qid); 2600 res->u.srq.fetchszm_to_iqid = 2601 /* no host cidx updates */ 2602 cpu_to_be32(FW_RI_RES_WR_HOSTFCMODE_V(0) | 2603 FW_RI_RES_WR_CPRIO_V(0) | /* don't keep in chip cache */ 2604 FW_RI_RES_WR_PCIECHN_V(0) | /* set by uP at ri_init time */ 2605 FW_RI_RES_WR_FETCHRO_V(0)); /* relaxed_ordering */ 2606 res->u.srq.dcaen_to_eqsize = 2607 cpu_to_be32(FW_RI_RES_WR_DCAEN_V(0) | 2608 FW_RI_RES_WR_DCACPU_V(0) | 2609 FW_RI_RES_WR_FBMIN_V(2) | 2610 FW_RI_RES_WR_FBMAX_V(3) | 2611 FW_RI_RES_WR_CIDXFTHRESHO_V(0) | 2612 FW_RI_RES_WR_CIDXFTHRESH_V(0) | 2613 FW_RI_RES_WR_EQSIZE_V(eqsize)); 2614 res->u.srq.eqaddr = cpu_to_be64(wq->dma_addr); 2615 res->u.srq.srqid = cpu_to_be32(srq->idx); 2616 res->u.srq.pdid = cpu_to_be32(srq->pdid); 2617 res->u.srq.hwsrqsize = cpu_to_be32(wq->rqt_size); 2618 res->u.srq.hwsrqaddr = cpu_to_be32(wq->rqt_hwaddr - 2619 rdev->lldi.vr->rq.start); 2620 2621 c4iw_init_wr_wait(wr_waitp); 2622 2623 ret = c4iw_ref_send_wait(rdev, skb, wr_waitp, 0, wq->qid, __func__); 2624 if (ret) 2625 goto err_free_queue; 2626 2627 pr_debug("%s srq %u eqid %u pdid %u queue va %p pa 0x%llx\n" 2628 " bar2_addr %p rqt addr 0x%x size %d\n", 2629 __func__, srq->idx, wq->qid, srq->pdid, wq->queue, 2630 (u64)virt_to_phys(wq->queue), wq->bar2_va, 2631 wq->rqt_hwaddr, wq->rqt_size); 2632 2633 return 0; 2634 err_free_queue: 2635 dma_free_coherent(&rdev->lldi.pdev->dev, 2636 wq->memsize, wq->queue, 2637 dma_unmap_addr(wq, mapping)); 2638 err_free_rqtpool: 2639 c4iw_rqtpool_free(rdev, wq->rqt_hwaddr, wq->rqt_size); 2640 err_free_pending_wrs: 2641 if (!user) 2642 kfree(wq->pending_wrs); 2643 err_free_sw_rq: 2644 if (!user) 2645 kfree(wq->sw_rq); 2646 err_put_qpid: 2647 c4iw_put_qpid(rdev, wq->qid, uctx); 2648 err: 2649 return ret; 2650 } 2651 2652 void c4iw_copy_wr_to_srq(struct t4_srq *srq, union t4_recv_wr *wqe, u8 len16) 2653 { 2654 u64 *src, *dst; 2655 2656 src = (u64 *)wqe; 2657 dst = (u64 *)((u8 *)srq->queue + srq->wq_pidx * T4_EQ_ENTRY_SIZE); 2658 while (len16) { 2659 *dst++ = *src++; 2660 if (dst >= (u64 *)&srq->queue[srq->size]) 2661 dst = (u64 *)srq->queue; 2662 *dst++ = *src++; 2663 if (dst >= (u64 *)&srq->queue[srq->size]) 2664 dst = (u64 *)srq->queue; 2665 len16--; 2666 } 2667 } 2668 2669 int c4iw_create_srq(struct ib_srq *ib_srq, struct ib_srq_init_attr *attrs, 2670 struct ib_udata *udata) 2671 { 2672 struct ib_pd *pd = ib_srq->pd; 2673 struct c4iw_dev *rhp; 2674 struct c4iw_srq *srq = to_c4iw_srq(ib_srq); 2675 struct c4iw_pd *php; 2676 struct c4iw_create_srq_resp uresp; 2677 struct c4iw_ucontext *ucontext; 2678 struct c4iw_mm_entry *srq_key_mm, *srq_db_key_mm; 2679 int rqsize; 2680 int ret; 2681 int wr_len; 2682 2683 pr_debug("%s ib_pd %p\n", __func__, pd); 2684 2685 php = to_c4iw_pd(pd); 2686 rhp = php->rhp; 2687 2688 if (!rhp->rdev.lldi.vr->srq.size) 2689 return -EINVAL; 2690 if (attrs->attr.max_wr > rhp->rdev.hw_queue.t4_max_rq_size) 2691 return -E2BIG; 2692 if (attrs->attr.max_sge > T4_MAX_RECV_SGE) 2693 return -E2BIG; 2694 2695 /* 2696 * SRQ RQT and RQ must be a power of 2 and at least 16 deep. 2697 */ 2698 rqsize = attrs->attr.max_wr + 1; 2699 rqsize = roundup_pow_of_two(max_t(u16, rqsize, 16)); 2700 2701 ucontext = rdma_udata_to_drv_context(udata, struct c4iw_ucontext, 2702 ibucontext); 2703 2704 srq->wr_waitp = c4iw_alloc_wr_wait(GFP_KERNEL); 2705 if (!srq->wr_waitp) 2706 return -ENOMEM; 2707 2708 srq->idx = c4iw_alloc_srq_idx(&rhp->rdev); 2709 if (srq->idx < 0) { 2710 ret = -ENOMEM; 2711 goto err_free_wr_wait; 2712 } 2713 2714 wr_len = sizeof(struct fw_ri_res_wr) + sizeof(struct fw_ri_res); 2715 srq->destroy_skb = alloc_skb(wr_len, GFP_KERNEL); 2716 if (!srq->destroy_skb) { 2717 ret = -ENOMEM; 2718 goto err_free_srq_idx; 2719 } 2720 2721 srq->rhp = rhp; 2722 srq->pdid = php->pdid; 2723 2724 srq->wq.size = rqsize; 2725 srq->wq.memsize = 2726 (rqsize + rhp->rdev.hw_queue.t4_eq_status_entries) * 2727 sizeof(*srq->wq.queue); 2728 if (ucontext) 2729 srq->wq.memsize = roundup(srq->wq.memsize, PAGE_SIZE); 2730 2731 ret = alloc_srq_queue(srq, ucontext ? &ucontext->uctx : 2732 &rhp->rdev.uctx, srq->wr_waitp); 2733 if (ret) 2734 goto err_free_skb; 2735 attrs->attr.max_wr = rqsize - 1; 2736 2737 if (CHELSIO_CHIP_VERSION(rhp->rdev.lldi.adapter_type) > CHELSIO_T6) 2738 srq->flags = T4_SRQ_LIMIT_SUPPORT; 2739 2740 if (udata) { 2741 srq_key_mm = kmalloc(sizeof(*srq_key_mm), GFP_KERNEL); 2742 if (!srq_key_mm) { 2743 ret = -ENOMEM; 2744 goto err_free_queue; 2745 } 2746 srq_db_key_mm = kmalloc(sizeof(*srq_db_key_mm), GFP_KERNEL); 2747 if (!srq_db_key_mm) { 2748 ret = -ENOMEM; 2749 goto err_free_srq_key_mm; 2750 } 2751 memset(&uresp, 0, sizeof(uresp)); 2752 uresp.flags = srq->flags; 2753 uresp.qid_mask = rhp->rdev.qpmask; 2754 uresp.srqid = srq->wq.qid; 2755 uresp.srq_size = srq->wq.size; 2756 uresp.srq_memsize = srq->wq.memsize; 2757 uresp.rqt_abs_idx = srq->wq.rqt_abs_idx; 2758 spin_lock(&ucontext->mmap_lock); 2759 uresp.srq_key = ucontext->key; 2760 ucontext->key += PAGE_SIZE; 2761 uresp.srq_db_gts_key = ucontext->key; 2762 ucontext->key += PAGE_SIZE; 2763 spin_unlock(&ucontext->mmap_lock); 2764 ret = ib_copy_to_udata(udata, &uresp, sizeof(uresp)); 2765 if (ret) 2766 goto err_free_srq_db_key_mm; 2767 srq_key_mm->key = uresp.srq_key; 2768 srq_key_mm->addr = virt_to_phys(srq->wq.queue); 2769 srq_key_mm->len = PAGE_ALIGN(srq->wq.memsize); 2770 insert_mmap(ucontext, srq_key_mm); 2771 srq_db_key_mm->key = uresp.srq_db_gts_key; 2772 srq_db_key_mm->addr = (u64)(unsigned long)srq->wq.bar2_pa; 2773 srq_db_key_mm->len = PAGE_SIZE; 2774 insert_mmap(ucontext, srq_db_key_mm); 2775 } 2776 2777 pr_debug("%s srq qid %u idx %u size %u memsize %lu num_entries %u\n", 2778 __func__, srq->wq.qid, srq->idx, srq->wq.size, 2779 (unsigned long)srq->wq.memsize, attrs->attr.max_wr); 2780 2781 spin_lock_init(&srq->lock); 2782 return 0; 2783 2784 err_free_srq_db_key_mm: 2785 kfree(srq_db_key_mm); 2786 err_free_srq_key_mm: 2787 kfree(srq_key_mm); 2788 err_free_queue: 2789 free_srq_queue(srq, ucontext ? &ucontext->uctx : &rhp->rdev.uctx, 2790 srq->wr_waitp); 2791 err_free_skb: 2792 kfree_skb(srq->destroy_skb); 2793 err_free_srq_idx: 2794 c4iw_free_srq_idx(&rhp->rdev, srq->idx); 2795 err_free_wr_wait: 2796 c4iw_put_wr_wait(srq->wr_waitp); 2797 return ret; 2798 } 2799 2800 void c4iw_destroy_srq(struct ib_srq *ibsrq, struct ib_udata *udata) 2801 { 2802 struct c4iw_dev *rhp; 2803 struct c4iw_srq *srq; 2804 struct c4iw_ucontext *ucontext; 2805 2806 srq = to_c4iw_srq(ibsrq); 2807 rhp = srq->rhp; 2808 2809 pr_debug("%s id %d\n", __func__, srq->wq.qid); 2810 ucontext = rdma_udata_to_drv_context(udata, struct c4iw_ucontext, 2811 ibucontext); 2812 free_srq_queue(srq, ucontext ? &ucontext->uctx : &rhp->rdev.uctx, 2813 srq->wr_waitp); 2814 c4iw_free_srq_idx(&rhp->rdev, srq->idx); 2815 c4iw_put_wr_wait(srq->wr_waitp); 2816 } 2817