1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2009-2013 Chelsio, Inc. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 */ 34 #include <sys/cdefs.h> 35 #include "opt_inet.h" 36 37 #ifdef TCP_OFFLOAD 38 #include <sys/types.h> 39 #include <sys/malloc.h> 40 #include <sys/socket.h> 41 #include <sys/socketvar.h> 42 #include <sys/sockio.h> 43 #include <sys/taskqueue.h> 44 #include <netinet/in.h> 45 #include <net/route.h> 46 47 #include <netinet/in_systm.h> 48 #include <netinet/in_pcb.h> 49 #include <netinet/ip.h> 50 #include <netinet/ip_var.h> 51 #include <netinet/tcp_var.h> 52 #include <netinet/tcp.h> 53 #include <netinet/tcpip.h> 54 55 #include <netinet/toecore.h> 56 57 struct sge_iq; 58 struct rss_header; 59 struct cpl_set_tcb_rpl; 60 #include <linux/types.h> 61 #include "offload.h" 62 #include "tom/t4_tom.h" 63 64 #include "iw_cxgbe.h" 65 #include "user.h" 66 67 static int creds(struct toepcb *toep, struct inpcb *inp, size_t wrsize); 68 static int max_fr_immd = T4_MAX_FR_IMMD;//SYSCTL parameter later... 69 70 static int alloc_ird(struct c4iw_dev *dev, u32 ird) 71 { 72 int ret = 0; 73 74 spin_lock_irq(&dev->lock); 75 if (ird <= dev->avail_ird) 76 dev->avail_ird -= ird; 77 else 78 ret = -ENOMEM; 79 spin_unlock_irq(&dev->lock); 80 81 if (ret) 82 log(LOG_WARNING, "%s: device IRD resources exhausted\n", 83 device_get_nameunit(dev->rdev.adap->dev)); 84 85 return ret; 86 } 87 88 static void free_ird(struct c4iw_dev *dev, int ird) 89 { 90 spin_lock_irq(&dev->lock); 91 dev->avail_ird += ird; 92 spin_unlock_irq(&dev->lock); 93 } 94 95 static void set_state(struct c4iw_qp *qhp, enum c4iw_qp_state state) 96 { 97 unsigned long flag; 98 spin_lock_irqsave(&qhp->lock, flag); 99 qhp->attr.state = state; 100 spin_unlock_irqrestore(&qhp->lock, flag); 101 } 102 103 static int destroy_qp(struct c4iw_rdev *rdev, struct t4_wq *wq, 104 struct c4iw_dev_ucontext *uctx) 105 { 106 struct c4iw_dev *rhp = rdev_to_c4iw_dev(rdev); 107 /* 108 * uP clears EQ contexts when the connection exits rdma mode, 109 * so no need to post a RESET WR for these EQs. 110 */ 111 dma_free_coherent(rhp->ibdev.dma_device, 112 wq->rq.memsize, wq->rq.queue, 113 dma_unmap_addr(&wq->rq, mapping)); 114 dma_free_coherent(rhp->ibdev.dma_device, 115 wq->sq.memsize, wq->sq.queue, 116 dma_unmap_addr(&wq->sq, mapping)); 117 c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size); 118 kfree(wq->rq.sw_rq); 119 kfree(wq->sq.sw_sq); 120 c4iw_put_qpid(rdev, wq->rq.qid, uctx); 121 c4iw_put_qpid(rdev, wq->sq.qid, uctx); 122 return 0; 123 } 124 125 static int create_qp(struct c4iw_rdev *rdev, struct t4_wq *wq, 126 struct t4_cq *rcq, struct t4_cq *scq, 127 struct c4iw_dev_ucontext *uctx) 128 { 129 struct adapter *sc = rdev->adap; 130 struct c4iw_dev *rhp = rdev_to_c4iw_dev(rdev); 131 int user = (uctx != &rdev->uctx); 132 struct fw_ri_res_wr *res_wr; 133 struct fw_ri_res *res; 134 int wr_len; 135 struct c4iw_wr_wait wr_wait; 136 int ret = 0; 137 int eqsize; 138 struct wrqe *wr; 139 u64 sq_bar2_qoffset = 0, rq_bar2_qoffset = 0; 140 141 if (__predict_false(c4iw_stopped(rdev))) 142 return -EIO; 143 144 wq->sq.qid = c4iw_get_qpid(rdev, uctx); 145 if (!wq->sq.qid) 146 return -ENOMEM; 147 148 wq->rq.qid = c4iw_get_qpid(rdev, uctx); 149 if (!wq->rq.qid) { 150 ret = -ENOMEM; 151 goto free_sq_qid; 152 } 153 154 if (!user) { 155 wq->sq.sw_sq = kzalloc(wq->sq.size * sizeof *wq->sq.sw_sq, 156 GFP_KERNEL); 157 if (!wq->sq.sw_sq) { 158 ret = -ENOMEM; 159 goto free_rq_qid; 160 } 161 162 wq->rq.sw_rq = kzalloc(wq->rq.size * sizeof *wq->rq.sw_rq, 163 GFP_KERNEL); 164 if (!wq->rq.sw_rq) { 165 ret = -ENOMEM; 166 goto free_sw_sq; 167 } 168 } 169 170 /* 171 * RQT must be a power of 2 and at least 16 deep. 172 */ 173 wq->rq.rqt_size = roundup_pow_of_two(max_t(u16, wq->rq.size, 16)); 174 wq->rq.rqt_hwaddr = c4iw_rqtpool_alloc(rdev, wq->rq.rqt_size); 175 if (!wq->rq.rqt_hwaddr) { 176 ret = -ENOMEM; 177 goto free_sw_rq; 178 } 179 180 /*QP memory, allocate DMAable memory for Send & Receive Queues */ 181 wq->sq.queue = dma_alloc_coherent(rhp->ibdev.dma_device, wq->sq.memsize, 182 &(wq->sq.dma_addr), GFP_KERNEL); 183 if (!wq->sq.queue) { 184 ret = -ENOMEM; 185 goto free_hwaddr; 186 } 187 wq->sq.phys_addr = vtophys(wq->sq.queue); 188 dma_unmap_addr_set(&wq->sq, mapping, wq->sq.dma_addr); 189 memset(wq->sq.queue, 0, wq->sq.memsize); 190 191 wq->rq.queue = dma_alloc_coherent(rhp->ibdev.dma_device, 192 wq->rq.memsize, &(wq->rq.dma_addr), GFP_KERNEL); 193 if (!wq->rq.queue) { 194 ret = -ENOMEM; 195 goto free_sq_dma; 196 } 197 wq->rq.phys_addr = vtophys(wq->rq.queue); 198 dma_unmap_addr_set(&wq->rq, mapping, wq->rq.dma_addr); 199 memset(wq->rq.queue, 0, wq->rq.memsize); 200 201 CTR5(KTR_IW_CXGBE, 202 "%s QP sq base va 0x%p pa 0x%llx rq base va 0x%p pa 0x%llx", 203 __func__, 204 wq->sq.queue, (unsigned long long)wq->sq.phys_addr, 205 wq->rq.queue, (unsigned long long)wq->rq.phys_addr); 206 207 /* Doorbell/WC regions, determine the BAR2 queue offset and qid. */ 208 t4_bar2_sge_qregs(rdev->adap, wq->sq.qid, T4_BAR2_QTYPE_EGRESS, user, 209 &sq_bar2_qoffset, &wq->sq.bar2_qid); 210 t4_bar2_sge_qregs(rdev->adap, wq->rq.qid, T4_BAR2_QTYPE_EGRESS, user, 211 &rq_bar2_qoffset, &wq->rq.bar2_qid); 212 213 if (user) { 214 /* Compute BAR2 DB/WC physical address(page-aligned) for 215 * Userspace mapping. 216 */ 217 wq->sq.bar2_pa = (rdev->bar2_pa + sq_bar2_qoffset) & PAGE_MASK; 218 wq->rq.bar2_pa = (rdev->bar2_pa + rq_bar2_qoffset) & PAGE_MASK; 219 CTR3(KTR_IW_CXGBE, 220 "%s BAR2 DB/WC sq base pa 0x%llx rq base pa 0x%llx", 221 __func__, (unsigned long long)wq->sq.bar2_pa, 222 (unsigned long long)wq->rq.bar2_pa); 223 } else { 224 /* Compute BAR2 DB/WC virtual address to access in kernel. */ 225 wq->sq.bar2_va = (void __iomem *)((u64)rdev->bar2_kva + 226 sq_bar2_qoffset); 227 wq->rq.bar2_va = (void __iomem *)((u64)rdev->bar2_kva + 228 rq_bar2_qoffset); 229 CTR3(KTR_IW_CXGBE, "%s BAR2 DB/WC sq base va %p rq base va %p", 230 __func__, (unsigned long long)wq->sq.bar2_va, 231 (unsigned long long)wq->rq.bar2_va); 232 } 233 234 wq->rdev = rdev; 235 wq->rq.msn = 1; 236 237 /* build fw_ri_res_wr */ 238 wr_len = sizeof *res_wr + 2 * sizeof *res; 239 240 wr = alloc_wrqe(wr_len, &sc->sge.ctrlq[0]); 241 if (wr == NULL) { 242 ret = -ENOMEM; 243 goto free_rq_dma; 244 } 245 res_wr = wrtod(wr); 246 247 memset(res_wr, 0, wr_len); 248 res_wr->op_nres = cpu_to_be32( 249 V_FW_WR_OP(FW_RI_RES_WR) | 250 V_FW_RI_RES_WR_NRES(2) | 251 F_FW_WR_COMPL); 252 res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16)); 253 res_wr->cookie = (unsigned long) &wr_wait; 254 res = res_wr->res; 255 res->u.sqrq.restype = FW_RI_RES_TYPE_SQ; 256 res->u.sqrq.op = FW_RI_RES_OP_WRITE; 257 258 /* eqsize is the number of 64B entries plus the status page size. */ 259 eqsize = wq->sq.size * T4_SQ_NUM_SLOTS + 260 rdev->hw_queue.t4_eq_status_entries; 261 262 res->u.sqrq.fetchszm_to_iqid = cpu_to_be32( 263 V_FW_RI_RES_WR_HOSTFCMODE(0) | /* no host cidx updates */ 264 V_FW_RI_RES_WR_CPRIO(0) | /* don't keep in chip cache */ 265 V_FW_RI_RES_WR_PCIECHN(0) | /* set by uP at ri_init time */ 266 V_FW_RI_RES_WR_IQID(scq->cqid)); 267 res->u.sqrq.dcaen_to_eqsize = cpu_to_be32( 268 V_FW_RI_RES_WR_DCAEN(0) | 269 V_FW_RI_RES_WR_DCACPU(0) | 270 V_FW_RI_RES_WR_FBMIN(chip_id(sc) <= CHELSIO_T5 ? 271 X_FETCHBURSTMIN_64B : X_FETCHBURSTMIN_64B_T6) | 272 V_FW_RI_RES_WR_FBMAX(3) | 273 V_FW_RI_RES_WR_CIDXFTHRESHO(0) | 274 V_FW_RI_RES_WR_CIDXFTHRESH(0) | 275 V_FW_RI_RES_WR_EQSIZE(eqsize)); 276 res->u.sqrq.eqid = cpu_to_be32(wq->sq.qid); 277 res->u.sqrq.eqaddr = cpu_to_be64(wq->sq.dma_addr); 278 res++; 279 res->u.sqrq.restype = FW_RI_RES_TYPE_RQ; 280 res->u.sqrq.op = FW_RI_RES_OP_WRITE; 281 282 /* eqsize is the number of 64B entries plus the status page size. */ 283 eqsize = wq->rq.size * T4_RQ_NUM_SLOTS + 284 rdev->hw_queue.t4_eq_status_entries; 285 res->u.sqrq.fetchszm_to_iqid = cpu_to_be32( 286 V_FW_RI_RES_WR_HOSTFCMODE(0) | /* no host cidx updates */ 287 V_FW_RI_RES_WR_CPRIO(0) | /* don't keep in chip cache */ 288 V_FW_RI_RES_WR_PCIECHN(0) | /* set by uP at ri_init time */ 289 V_FW_RI_RES_WR_IQID(rcq->cqid)); 290 res->u.sqrq.dcaen_to_eqsize = cpu_to_be32( 291 V_FW_RI_RES_WR_DCAEN(0) | 292 V_FW_RI_RES_WR_DCACPU(0) | 293 V_FW_RI_RES_WR_FBMIN(chip_id(sc) <= CHELSIO_T5 ? 294 X_FETCHBURSTMIN_64B : X_FETCHBURSTMIN_64B_T6) | 295 V_FW_RI_RES_WR_FBMAX(3) | 296 V_FW_RI_RES_WR_CIDXFTHRESHO(0) | 297 V_FW_RI_RES_WR_CIDXFTHRESH(0) | 298 V_FW_RI_RES_WR_EQSIZE(eqsize)); 299 res->u.sqrq.eqid = cpu_to_be32(wq->rq.qid); 300 res->u.sqrq.eqaddr = cpu_to_be64(wq->rq.dma_addr); 301 302 c4iw_init_wr_wait(&wr_wait); 303 304 t4_wrq_tx(sc, wr); 305 ret = c4iw_wait_for_reply(rdev, &wr_wait, 0, wq->sq.qid, 306 NULL, __func__); 307 if (ret) 308 goto free_rq_dma; 309 310 CTR5(KTR_IW_CXGBE, 311 "%s sqid 0x%x rqid 0x%x kdb 0x%p squdb 0x%llx rqudb 0x%llx", 312 __func__, wq->sq.qid, wq->rq.qid, 313 (unsigned long long)wq->sq.bar2_va, 314 (unsigned long long)wq->rq.bar2_va); 315 316 return 0; 317 free_rq_dma: 318 dma_free_coherent(rhp->ibdev.dma_device, 319 wq->rq.memsize, wq->rq.queue, 320 dma_unmap_addr(&wq->rq, mapping)); 321 free_sq_dma: 322 dma_free_coherent(rhp->ibdev.dma_device, 323 wq->sq.memsize, wq->sq.queue, 324 dma_unmap_addr(&wq->sq, mapping)); 325 free_hwaddr: 326 c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size); 327 free_sw_rq: 328 kfree(wq->rq.sw_rq); 329 free_sw_sq: 330 kfree(wq->sq.sw_sq); 331 free_rq_qid: 332 c4iw_put_qpid(rdev, wq->rq.qid, uctx); 333 free_sq_qid: 334 c4iw_put_qpid(rdev, wq->sq.qid, uctx); 335 return ret; 336 } 337 338 static int build_immd(struct t4_sq *sq, struct fw_ri_immd *immdp, 339 const struct ib_send_wr *wr, int max, u32 *plenp) 340 { 341 u8 *dstp, *srcp; 342 u32 plen = 0; 343 int i; 344 int rem, len; 345 346 dstp = (u8 *)immdp->data; 347 for (i = 0; i < wr->num_sge; i++) { 348 if ((plen + wr->sg_list[i].length) > max) 349 return -EMSGSIZE; 350 srcp = (u8 *)(unsigned long)wr->sg_list[i].addr; 351 plen += wr->sg_list[i].length; 352 rem = wr->sg_list[i].length; 353 while (rem) { 354 if (dstp == (u8 *)&sq->queue[sq->size]) 355 dstp = (u8 *)sq->queue; 356 if (rem <= (u8 *)&sq->queue[sq->size] - dstp) 357 len = rem; 358 else 359 len = (u8 *)&sq->queue[sq->size] - dstp; 360 memcpy(dstp, srcp, len); 361 dstp += len; 362 srcp += len; 363 rem -= len; 364 } 365 } 366 len = roundup(plen + sizeof *immdp, 16) - (plen + sizeof *immdp); 367 if (len) 368 memset(dstp, 0, len); 369 immdp->op = FW_RI_DATA_IMMD; 370 immdp->r1 = 0; 371 immdp->r2 = 0; 372 immdp->immdlen = cpu_to_be32(plen); 373 *plenp = plen; 374 return 0; 375 } 376 377 static int build_isgl(__be64 *queue_start, __be64 *queue_end, 378 struct fw_ri_isgl *isglp, struct ib_sge *sg_list, 379 int num_sge, u32 *plenp) 380 381 { 382 int i; 383 u32 plen = 0; 384 __be64 *flitp = (__be64 *)isglp->sge; 385 386 for (i = 0; i < num_sge; i++) { 387 if ((plen + sg_list[i].length) < plen) 388 return -EMSGSIZE; 389 plen += sg_list[i].length; 390 *flitp = cpu_to_be64(((u64)sg_list[i].lkey << 32) | 391 sg_list[i].length); 392 if (++flitp == queue_end) 393 flitp = queue_start; 394 *flitp = cpu_to_be64(sg_list[i].addr); 395 if (++flitp == queue_end) 396 flitp = queue_start; 397 } 398 *flitp = (__force __be64)0; 399 isglp->op = FW_RI_DATA_ISGL; 400 isglp->r1 = 0; 401 isglp->nsge = cpu_to_be16(num_sge); 402 isglp->r2 = 0; 403 if (plenp) 404 *plenp = plen; 405 return 0; 406 } 407 408 static int build_rdma_send(struct t4_sq *sq, union t4_wr *wqe, 409 const struct ib_send_wr *wr, u8 *len16) 410 { 411 u32 plen; 412 int size; 413 int ret; 414 415 if (wr->num_sge > T4_MAX_SEND_SGE) 416 return -EINVAL; 417 switch (wr->opcode) { 418 case IB_WR_SEND: 419 if (wr->send_flags & IB_SEND_SOLICITED) 420 wqe->send.sendop_pkd = cpu_to_be32( 421 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_SE)); 422 else 423 wqe->send.sendop_pkd = cpu_to_be32( 424 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND)); 425 wqe->send.stag_inv = 0; 426 break; 427 case IB_WR_SEND_WITH_INV: 428 if (wr->send_flags & IB_SEND_SOLICITED) 429 wqe->send.sendop_pkd = cpu_to_be32( 430 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_SE_INV)); 431 else 432 wqe->send.sendop_pkd = cpu_to_be32( 433 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_INV)); 434 wqe->send.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey); 435 break; 436 437 default: 438 return -EINVAL; 439 } 440 wqe->send.r3 = 0; 441 wqe->send.r4 = 0; 442 443 plen = 0; 444 if (wr->num_sge) { 445 if (wr->send_flags & IB_SEND_INLINE) { 446 ret = build_immd(sq, wqe->send.u.immd_src, wr, 447 T4_MAX_SEND_INLINE, &plen); 448 if (ret) 449 return ret; 450 size = sizeof wqe->send + sizeof(struct fw_ri_immd) + 451 plen; 452 } else { 453 ret = build_isgl((__be64 *)sq->queue, 454 (__be64 *)&sq->queue[sq->size], 455 wqe->send.u.isgl_src, 456 wr->sg_list, wr->num_sge, &plen); 457 if (ret) 458 return ret; 459 size = sizeof wqe->send + sizeof(struct fw_ri_isgl) + 460 wr->num_sge * sizeof(struct fw_ri_sge); 461 } 462 } else { 463 wqe->send.u.immd_src[0].op = FW_RI_DATA_IMMD; 464 wqe->send.u.immd_src[0].r1 = 0; 465 wqe->send.u.immd_src[0].r2 = 0; 466 wqe->send.u.immd_src[0].immdlen = 0; 467 size = sizeof wqe->send + sizeof(struct fw_ri_immd); 468 plen = 0; 469 } 470 *len16 = DIV_ROUND_UP(size, 16); 471 wqe->send.plen = cpu_to_be32(plen); 472 return 0; 473 } 474 475 static int build_rdma_write(struct t4_sq *sq, union t4_wr *wqe, 476 const struct ib_send_wr *wr, u8 *len16) 477 { 478 u32 plen; 479 int size; 480 int ret; 481 482 if (wr->num_sge > T4_MAX_SEND_SGE) 483 return -EINVAL; 484 wqe->write.immd_data = 0; 485 wqe->write.stag_sink = cpu_to_be32(rdma_wr(wr)->rkey); 486 wqe->write.to_sink = cpu_to_be64(rdma_wr(wr)->remote_addr); 487 if (wr->num_sge) { 488 if (wr->send_flags & IB_SEND_INLINE) { 489 ret = build_immd(sq, wqe->write.u.immd_src, wr, 490 T4_MAX_WRITE_INLINE, &plen); 491 if (ret) 492 return ret; 493 size = sizeof wqe->write + sizeof(struct fw_ri_immd) + 494 plen; 495 } else { 496 ret = build_isgl((__be64 *)sq->queue, 497 (__be64 *)&sq->queue[sq->size], 498 wqe->write.u.isgl_src, 499 wr->sg_list, wr->num_sge, &plen); 500 if (ret) 501 return ret; 502 size = sizeof wqe->write + sizeof(struct fw_ri_isgl) + 503 wr->num_sge * sizeof(struct fw_ri_sge); 504 } 505 } else { 506 wqe->write.u.immd_src[0].op = FW_RI_DATA_IMMD; 507 wqe->write.u.immd_src[0].r1 = 0; 508 wqe->write.u.immd_src[0].r2 = 0; 509 wqe->write.u.immd_src[0].immdlen = 0; 510 size = sizeof wqe->write + sizeof(struct fw_ri_immd); 511 plen = 0; 512 } 513 *len16 = DIV_ROUND_UP(size, 16); 514 wqe->write.plen = cpu_to_be32(plen); 515 return 0; 516 } 517 518 static int build_rdma_read(union t4_wr *wqe, const struct ib_send_wr *wr, u8 *len16) 519 { 520 if (wr->num_sge > 1) 521 return -EINVAL; 522 if (wr->num_sge && wr->sg_list[0].length) { 523 wqe->read.stag_src = cpu_to_be32(rdma_wr(wr)->rkey); 524 wqe->read.to_src_hi = cpu_to_be32((u32)(rdma_wr(wr)->remote_addr 525 >> 32)); 526 wqe->read.to_src_lo = 527 cpu_to_be32((u32)rdma_wr(wr)->remote_addr); 528 wqe->read.stag_sink = cpu_to_be32(wr->sg_list[0].lkey); 529 wqe->read.plen = cpu_to_be32(wr->sg_list[0].length); 530 wqe->read.to_sink_hi = cpu_to_be32((u32)(wr->sg_list[0].addr 531 >> 32)); 532 wqe->read.to_sink_lo = cpu_to_be32((u32)(wr->sg_list[0].addr)); 533 } else { 534 wqe->read.stag_src = cpu_to_be32(2); 535 wqe->read.to_src_hi = 0; 536 wqe->read.to_src_lo = 0; 537 wqe->read.stag_sink = cpu_to_be32(2); 538 wqe->read.plen = 0; 539 wqe->read.to_sink_hi = 0; 540 wqe->read.to_sink_lo = 0; 541 } 542 wqe->read.r2 = 0; 543 wqe->read.r5 = 0; 544 *len16 = DIV_ROUND_UP(sizeof wqe->read, 16); 545 return 0; 546 } 547 548 static int build_rdma_recv(struct c4iw_qp *qhp, union t4_recv_wr *wqe, 549 const struct ib_recv_wr *wr, u8 *len16) 550 { 551 int ret; 552 553 ret = build_isgl((__be64 *)qhp->wq.rq.queue, 554 (__be64 *)&qhp->wq.rq.queue[qhp->wq.rq.size], 555 &wqe->recv.isgl, wr->sg_list, wr->num_sge, NULL); 556 if (ret) 557 return ret; 558 *len16 = DIV_ROUND_UP(sizeof wqe->recv + 559 wr->num_sge * sizeof(struct fw_ri_sge), 16); 560 return 0; 561 } 562 563 static int build_inv_stag(union t4_wr *wqe, const struct ib_send_wr *wr, 564 u8 *len16) 565 { 566 wqe->inv.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey); 567 wqe->inv.r2 = 0; 568 *len16 = DIV_ROUND_UP(sizeof wqe->inv, 16); 569 return 0; 570 } 571 572 static void free_qp_work(struct work_struct *work) 573 { 574 struct c4iw_ucontext *ucontext; 575 struct c4iw_qp *qhp; 576 struct c4iw_dev *rhp; 577 578 qhp = container_of(work, struct c4iw_qp, free_work); 579 ucontext = qhp->ucontext; 580 rhp = qhp->rhp; 581 582 CTR3(KTR_IW_CXGBE, "%s qhp %p ucontext %p", __func__, 583 qhp, ucontext); 584 destroy_qp(&rhp->rdev, &qhp->wq, 585 ucontext ? &ucontext->uctx : &rhp->rdev.uctx); 586 587 kfree(qhp); 588 } 589 590 static void queue_qp_free(struct kref *kref) 591 { 592 struct c4iw_qp *qhp; 593 594 qhp = container_of(kref, struct c4iw_qp, kref); 595 CTR2(KTR_IW_CXGBE, "%s qhp %p", __func__, qhp); 596 queue_work(qhp->rhp->rdev.free_workq, &qhp->free_work); 597 } 598 599 void c4iw_qp_add_ref(struct ib_qp *qp) 600 { 601 CTR2(KTR_IW_CXGBE, "%s ib_qp %p", __func__, qp); 602 kref_get(&to_c4iw_qp(qp)->kref); 603 } 604 605 void c4iw_qp_rem_ref(struct ib_qp *qp) 606 { 607 CTR2(KTR_IW_CXGBE, "%s ib_qp %p", __func__, qp); 608 kref_put(&to_c4iw_qp(qp)->kref, queue_qp_free); 609 } 610 611 static void complete_sq_drain_wr(struct c4iw_qp *qhp, const struct ib_send_wr *wr) 612 { 613 struct t4_cqe cqe = {}; 614 struct c4iw_cq *schp; 615 unsigned long flag; 616 struct t4_cq *cq; 617 618 schp = to_c4iw_cq(qhp->ibqp.send_cq); 619 cq = &schp->cq; 620 621 PDBG("%s drain sq id %u\n", __func__, qhp->wq.sq.qid); 622 cqe.u.drain_cookie = wr->wr_id; 623 cqe.header = cpu_to_be32(V_CQE_STATUS(T4_ERR_SWFLUSH) | 624 V_CQE_OPCODE(C4IW_DRAIN_OPCODE) | 625 V_CQE_TYPE(1) | 626 V_CQE_SWCQE(1) | 627 V_CQE_QPID(qhp->wq.sq.qid)); 628 629 spin_lock_irqsave(&schp->lock, flag); 630 cqe.bits_type_ts = cpu_to_be64(V_CQE_GENBIT((u64)cq->gen)); 631 cq->sw_queue[cq->sw_pidx] = cqe; 632 t4_swcq_produce(cq); 633 spin_unlock_irqrestore(&schp->lock, flag); 634 635 spin_lock_irqsave(&schp->comp_handler_lock, flag); 636 (*schp->ibcq.comp_handler)(&schp->ibcq, 637 schp->ibcq.cq_context); 638 spin_unlock_irqrestore(&schp->comp_handler_lock, flag); 639 } 640 641 static void complete_rq_drain_wr(struct c4iw_qp *qhp, const struct ib_recv_wr *wr) 642 { 643 struct t4_cqe cqe = {}; 644 struct c4iw_cq *rchp; 645 unsigned long flag; 646 struct t4_cq *cq; 647 648 rchp = to_c4iw_cq(qhp->ibqp.recv_cq); 649 cq = &rchp->cq; 650 651 PDBG("%s drain rq id %u\n", __func__, qhp->wq.sq.qid); 652 cqe.u.drain_cookie = wr->wr_id; 653 cqe.header = cpu_to_be32(V_CQE_STATUS(T4_ERR_SWFLUSH) | 654 V_CQE_OPCODE(C4IW_DRAIN_OPCODE) | 655 V_CQE_TYPE(0) | 656 V_CQE_SWCQE(1) | 657 V_CQE_QPID(qhp->wq.sq.qid)); 658 659 spin_lock_irqsave(&rchp->lock, flag); 660 cqe.bits_type_ts = cpu_to_be64(V_CQE_GENBIT((u64)cq->gen)); 661 cq->sw_queue[cq->sw_pidx] = cqe; 662 t4_swcq_produce(cq); 663 spin_unlock_irqrestore(&rchp->lock, flag); 664 665 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 666 (*rchp->ibcq.comp_handler)(&rchp->ibcq, 667 rchp->ibcq.cq_context); 668 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 669 } 670 671 static int build_tpte_memreg(struct fw_ri_fr_nsmr_tpte_wr *fr, 672 const struct ib_reg_wr *wr, struct c4iw_mr *mhp, u8 *len16) 673 { 674 __be64 *p = (__be64 *)fr->pbl; 675 676 if (wr->mr->page_size > C4IW_MAX_PAGE_SIZE) 677 return -EINVAL; 678 679 fr->r2 = cpu_to_be32(0); 680 fr->stag = cpu_to_be32(mhp->ibmr.rkey); 681 682 fr->tpte.valid_to_pdid = cpu_to_be32(F_FW_RI_TPTE_VALID | 683 V_FW_RI_TPTE_STAGKEY((mhp->ibmr.rkey & M_FW_RI_TPTE_STAGKEY)) | 684 V_FW_RI_TPTE_STAGSTATE(1) | 685 V_FW_RI_TPTE_STAGTYPE(FW_RI_STAG_NSMR) | 686 V_FW_RI_TPTE_PDID(mhp->attr.pdid)); 687 fr->tpte.locread_to_qpid = cpu_to_be32( 688 V_FW_RI_TPTE_PERM(c4iw_ib_to_tpt_access(wr->access)) | 689 V_FW_RI_TPTE_ADDRTYPE(FW_RI_VA_BASED_TO) | 690 V_FW_RI_TPTE_PS(ilog2(wr->mr->page_size) - 12)); 691 fr->tpte.nosnoop_pbladdr = cpu_to_be32(V_FW_RI_TPTE_PBLADDR( 692 PBL_OFF(&mhp->rhp->rdev, mhp->attr.pbl_addr)>>3)); 693 fr->tpte.dca_mwbcnt_pstag = cpu_to_be32(0); 694 fr->tpte.len_hi = cpu_to_be32(mhp->ibmr.length >> 32); 695 fr->tpte.len_lo = cpu_to_be32(mhp->ibmr.length & 0xffffffff); 696 fr->tpte.va_hi = cpu_to_be32(mhp->ibmr.iova >> 32); 697 fr->tpte.va_lo_fbo = cpu_to_be32(mhp->ibmr.iova & 0xffffffff); 698 699 p[0] = cpu_to_be64((u64)mhp->mpl[0]); 700 p[1] = cpu_to_be64((u64)mhp->mpl[1]); 701 702 *len16 = DIV_ROUND_UP(sizeof(*fr), 16); 703 return 0; 704 } 705 706 static int build_memreg(struct t4_sq *sq, union t4_wr *wqe, 707 const struct ib_reg_wr *wr, struct c4iw_mr *mhp, u8 *len16, 708 bool dsgl_supported) 709 { 710 struct fw_ri_immd *imdp; 711 __be64 *p; 712 int i; 713 int pbllen = roundup(mhp->mpl_len * sizeof(u64), 32); 714 int rem; 715 716 if (mhp->mpl_len > t4_max_fr_depth(&mhp->rhp->rdev, use_dsgl)) 717 return -EINVAL; 718 if (wr->mr->page_size > C4IW_MAX_PAGE_SIZE) 719 return -EINVAL; 720 721 wqe->fr.qpbinde_to_dcacpu = 0; 722 wqe->fr.pgsz_shift = ilog2(wr->mr->page_size) - 12; 723 wqe->fr.addr_type = FW_RI_VA_BASED_TO; 724 wqe->fr.mem_perms = c4iw_ib_to_tpt_access(wr->access); 725 wqe->fr.len_hi = cpu_to_be32(mhp->ibmr.length >> 32); 726 wqe->fr.len_lo = cpu_to_be32(mhp->ibmr.length & 0xffffffff); 727 wqe->fr.stag = cpu_to_be32(wr->key); 728 wqe->fr.va_hi = cpu_to_be32(mhp->ibmr.iova >> 32); 729 wqe->fr.va_lo_fbo = cpu_to_be32(mhp->ibmr.iova & 0xffffffff); 730 731 if (dsgl_supported && use_dsgl && (pbllen > max_fr_immd)) { 732 struct fw_ri_dsgl *sglp; 733 734 for (i = 0; i < mhp->mpl_len; i++) 735 mhp->mpl[i] = 736 (__force u64)cpu_to_be64((u64)mhp->mpl[i]); 737 738 sglp = (struct fw_ri_dsgl *)(&wqe->fr + 1); 739 sglp->op = FW_RI_DATA_DSGL; 740 sglp->r1 = 0; 741 sglp->nsge = cpu_to_be16(1); 742 sglp->addr0 = cpu_to_be64(mhp->mpl_addr); 743 sglp->len0 = cpu_to_be32(pbllen); 744 745 *len16 = DIV_ROUND_UP(sizeof(wqe->fr) + sizeof(*sglp), 16); 746 } else { 747 imdp = (struct fw_ri_immd *)(&wqe->fr + 1); 748 imdp->op = FW_RI_DATA_IMMD; 749 imdp->r1 = 0; 750 imdp->r2 = 0; 751 imdp->immdlen = cpu_to_be32(pbllen); 752 p = (__be64 *)(imdp + 1); 753 rem = pbllen; 754 for (i = 0; i < mhp->mpl_len; i++) { 755 *p = cpu_to_be64((u64)mhp->mpl[i]); 756 rem -= sizeof(*p); 757 if (++p == (__be64 *)&sq->queue[sq->size]) 758 p = (__be64 *)sq->queue; 759 } 760 BUG_ON(rem < 0); 761 while (rem) { 762 *p = 0; 763 rem -= sizeof(*p); 764 if (++p == (__be64 *)&sq->queue[sq->size]) 765 p = (__be64 *)sq->queue; 766 } 767 *len16 = DIV_ROUND_UP(sizeof(wqe->fr) + sizeof(*imdp) 768 + pbllen, 16); 769 } 770 771 return 0; 772 } 773 774 int c4iw_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, 775 const struct ib_send_wr **bad_wr) 776 { 777 int err = 0; 778 u8 len16 = 0; 779 enum fw_wr_opcodes fw_opcode = 0; 780 enum fw_ri_wr_flags fw_flags; 781 struct c4iw_qp *qhp; 782 union t4_wr *wqe = NULL; 783 u32 num_wrs; 784 struct t4_swsqe *swsqe; 785 unsigned long flag; 786 u16 idx = 0; 787 struct c4iw_rdev *rdev; 788 789 qhp = to_c4iw_qp(ibqp); 790 rdev = &qhp->rhp->rdev; 791 if (__predict_false(c4iw_stopped(rdev))) 792 return -EIO; 793 spin_lock_irqsave(&qhp->lock, flag); 794 if (t4_wq_in_error(&qhp->wq)) { 795 spin_unlock_irqrestore(&qhp->lock, flag); 796 complete_sq_drain_wr(qhp, wr); 797 return err; 798 } 799 num_wrs = t4_sq_avail(&qhp->wq); 800 if (num_wrs == 0) { 801 spin_unlock_irqrestore(&qhp->lock, flag); 802 *bad_wr = wr; 803 return -ENOMEM; 804 } 805 while (wr) { 806 if (num_wrs == 0) { 807 err = -ENOMEM; 808 *bad_wr = wr; 809 break; 810 } 811 wqe = (union t4_wr *)((u8 *)qhp->wq.sq.queue + 812 qhp->wq.sq.wq_pidx * T4_EQ_ENTRY_SIZE); 813 814 fw_flags = 0; 815 if (wr->send_flags & IB_SEND_SOLICITED) 816 fw_flags |= FW_RI_SOLICITED_EVENT_FLAG; 817 if (wr->send_flags & IB_SEND_SIGNALED || qhp->sq_sig_all) 818 fw_flags |= FW_RI_COMPLETION_FLAG; 819 swsqe = &qhp->wq.sq.sw_sq[qhp->wq.sq.pidx]; 820 switch (wr->opcode) { 821 case IB_WR_SEND_WITH_INV: 822 case IB_WR_SEND: 823 if (wr->send_flags & IB_SEND_FENCE) 824 fw_flags |= FW_RI_READ_FENCE_FLAG; 825 fw_opcode = FW_RI_SEND_WR; 826 if (wr->opcode == IB_WR_SEND) 827 swsqe->opcode = FW_RI_SEND; 828 else 829 swsqe->opcode = FW_RI_SEND_WITH_INV; 830 err = build_rdma_send(&qhp->wq.sq, wqe, wr, &len16); 831 break; 832 case IB_WR_RDMA_WRITE: 833 fw_opcode = FW_RI_RDMA_WRITE_WR; 834 swsqe->opcode = FW_RI_RDMA_WRITE; 835 err = build_rdma_write(&qhp->wq.sq, wqe, wr, &len16); 836 break; 837 case IB_WR_RDMA_READ: 838 case IB_WR_RDMA_READ_WITH_INV: 839 fw_opcode = FW_RI_RDMA_READ_WR; 840 swsqe->opcode = FW_RI_READ_REQ; 841 if (wr->opcode == IB_WR_RDMA_READ_WITH_INV) { 842 c4iw_invalidate_mr(qhp->rhp, 843 wr->sg_list[0].lkey); 844 fw_flags = FW_RI_RDMA_READ_INVALIDATE; 845 } else { 846 fw_flags = 0; 847 } 848 err = build_rdma_read(wqe, wr, &len16); 849 if (err) 850 break; 851 swsqe->read_len = wr->sg_list[0].length; 852 if (!qhp->wq.sq.oldest_read) 853 qhp->wq.sq.oldest_read = swsqe; 854 break; 855 case IB_WR_REG_MR: { 856 struct c4iw_mr *mhp = to_c4iw_mr(reg_wr(wr)->mr); 857 858 swsqe->opcode = FW_RI_FAST_REGISTER; 859 if (rdev->adap->params.fr_nsmr_tpte_wr_support && 860 !mhp->attr.state && mhp->mpl_len <= 2) { 861 fw_opcode = FW_RI_FR_NSMR_TPTE_WR; 862 err = build_tpte_memreg(&wqe->fr_tpte, reg_wr(wr), 863 mhp, &len16); 864 } else { 865 fw_opcode = FW_RI_FR_NSMR_WR; 866 err = build_memreg(&qhp->wq.sq, wqe, reg_wr(wr), 867 mhp, &len16, 868 rdev->adap->params.ulptx_memwrite_dsgl); 869 } 870 if (err) 871 break; 872 mhp->attr.state = 1; 873 break; 874 } 875 case IB_WR_LOCAL_INV: 876 if (wr->send_flags & IB_SEND_FENCE) 877 fw_flags |= FW_RI_LOCAL_FENCE_FLAG; 878 fw_opcode = FW_RI_INV_LSTAG_WR; 879 swsqe->opcode = FW_RI_LOCAL_INV; 880 err = build_inv_stag(wqe, wr, &len16); 881 c4iw_invalidate_mr(qhp->rhp, wr->ex.invalidate_rkey); 882 break; 883 default: 884 CTR2(KTR_IW_CXGBE, "%s post of type =%d TBD!", __func__, 885 wr->opcode); 886 err = -EINVAL; 887 } 888 if (err) { 889 *bad_wr = wr; 890 break; 891 } 892 swsqe->idx = qhp->wq.sq.pidx; 893 swsqe->complete = 0; 894 swsqe->signaled = (wr->send_flags & IB_SEND_SIGNALED) || 895 qhp->sq_sig_all; 896 swsqe->flushed = 0; 897 swsqe->wr_id = wr->wr_id; 898 899 init_wr_hdr(wqe, qhp->wq.sq.pidx, fw_opcode, fw_flags, len16); 900 901 CTR5(KTR_IW_CXGBE, 902 "%s cookie 0x%llx pidx 0x%x opcode 0x%x read_len %u", 903 __func__, (unsigned long long)wr->wr_id, qhp->wq.sq.pidx, 904 swsqe->opcode, swsqe->read_len); 905 wr = wr->next; 906 num_wrs--; 907 t4_sq_produce(&qhp->wq, len16); 908 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); 909 } 910 911 t4_ring_sq_db(&qhp->wq, idx, wqe, rdev->adap->iwt.wc_en); 912 spin_unlock_irqrestore(&qhp->lock, flag); 913 return err; 914 } 915 916 int c4iw_post_receive(struct ib_qp *ibqp, const struct ib_recv_wr *wr, 917 const struct ib_recv_wr **bad_wr) 918 { 919 int err = 0; 920 struct c4iw_qp *qhp; 921 union t4_recv_wr *wqe = NULL; 922 u32 num_wrs; 923 u8 len16 = 0; 924 unsigned long flag; 925 u16 idx = 0; 926 927 qhp = to_c4iw_qp(ibqp); 928 if (__predict_false(c4iw_stopped(&qhp->rhp->rdev))) 929 return -EIO; 930 spin_lock_irqsave(&qhp->lock, flag); 931 if (t4_wq_in_error(&qhp->wq)) { 932 spin_unlock_irqrestore(&qhp->lock, flag); 933 complete_rq_drain_wr(qhp, wr); 934 return err; 935 } 936 num_wrs = t4_rq_avail(&qhp->wq); 937 if (num_wrs == 0) { 938 spin_unlock_irqrestore(&qhp->lock, flag); 939 *bad_wr = wr; 940 return -ENOMEM; 941 } 942 while (wr) { 943 if (wr->num_sge > T4_MAX_RECV_SGE) { 944 err = -EINVAL; 945 *bad_wr = wr; 946 break; 947 } 948 wqe = (union t4_recv_wr *)((u8 *)qhp->wq.rq.queue + 949 qhp->wq.rq.wq_pidx * 950 T4_EQ_ENTRY_SIZE); 951 if (num_wrs) 952 err = build_rdma_recv(qhp, wqe, wr, &len16); 953 else 954 err = -ENOMEM; 955 if (err) { 956 *bad_wr = wr; 957 break; 958 } 959 960 qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].wr_id = wr->wr_id; 961 962 wqe->recv.opcode = FW_RI_RECV_WR; 963 wqe->recv.r1 = 0; 964 wqe->recv.wrid = qhp->wq.rq.pidx; 965 wqe->recv.r2[0] = 0; 966 wqe->recv.r2[1] = 0; 967 wqe->recv.r2[2] = 0; 968 wqe->recv.len16 = len16; 969 CTR3(KTR_IW_CXGBE, "%s cookie 0x%llx pidx %u", __func__, 970 (unsigned long long) wr->wr_id, qhp->wq.rq.pidx); 971 t4_rq_produce(&qhp->wq, len16); 972 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); 973 wr = wr->next; 974 num_wrs--; 975 } 976 977 t4_ring_rq_db(&qhp->wq, idx, wqe, qhp->rhp->rdev.adap->iwt.wc_en); 978 spin_unlock_irqrestore(&qhp->lock, flag); 979 return err; 980 } 981 982 static inline void build_term_codes(struct t4_cqe *err_cqe, u8 *layer_type, 983 u8 *ecode) 984 { 985 int status; 986 int tagged; 987 int opcode; 988 int rqtype; 989 int send_inv; 990 991 if (!err_cqe) { 992 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA; 993 *ecode = 0; 994 return; 995 } 996 997 status = CQE_STATUS(err_cqe); 998 opcode = CQE_OPCODE(err_cqe); 999 rqtype = RQ_TYPE(err_cqe); 1000 send_inv = (opcode == FW_RI_SEND_WITH_INV) || 1001 (opcode == FW_RI_SEND_WITH_SE_INV); 1002 tagged = (opcode == FW_RI_RDMA_WRITE) || 1003 (rqtype && (opcode == FW_RI_READ_RESP)); 1004 1005 switch (status) { 1006 case T4_ERR_STAG: 1007 if (send_inv) { 1008 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 1009 *ecode = RDMAP_CANT_INV_STAG; 1010 } else { 1011 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1012 *ecode = RDMAP_INV_STAG; 1013 } 1014 break; 1015 case T4_ERR_PDID: 1016 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1017 if ((opcode == FW_RI_SEND_WITH_INV) || 1018 (opcode == FW_RI_SEND_WITH_SE_INV)) 1019 *ecode = RDMAP_CANT_INV_STAG; 1020 else 1021 *ecode = RDMAP_STAG_NOT_ASSOC; 1022 break; 1023 case T4_ERR_QPID: 1024 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1025 *ecode = RDMAP_STAG_NOT_ASSOC; 1026 break; 1027 case T4_ERR_ACCESS: 1028 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1029 *ecode = RDMAP_ACC_VIOL; 1030 break; 1031 case T4_ERR_WRAP: 1032 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1033 *ecode = RDMAP_TO_WRAP; 1034 break; 1035 case T4_ERR_BOUND: 1036 if (tagged) { 1037 *layer_type = LAYER_DDP|DDP_TAGGED_ERR; 1038 *ecode = DDPT_BASE_BOUNDS; 1039 } else { 1040 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1041 *ecode = RDMAP_BASE_BOUNDS; 1042 } 1043 break; 1044 case T4_ERR_INVALIDATE_SHARED_MR: 1045 case T4_ERR_INVALIDATE_MR_WITH_MW_BOUND: 1046 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 1047 *ecode = RDMAP_CANT_INV_STAG; 1048 break; 1049 case T4_ERR_ECC: 1050 case T4_ERR_ECC_PSTAG: 1051 case T4_ERR_INTERNAL_ERR: 1052 *layer_type = LAYER_RDMAP|RDMAP_LOCAL_CATA; 1053 *ecode = 0; 1054 break; 1055 case T4_ERR_OUT_OF_RQE: 1056 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1057 *ecode = DDPU_INV_MSN_NOBUF; 1058 break; 1059 case T4_ERR_PBL_ADDR_BOUND: 1060 *layer_type = LAYER_DDP|DDP_TAGGED_ERR; 1061 *ecode = DDPT_BASE_BOUNDS; 1062 break; 1063 case T4_ERR_CRC: 1064 *layer_type = LAYER_MPA|DDP_LLP; 1065 *ecode = MPA_CRC_ERR; 1066 break; 1067 case T4_ERR_MARKER: 1068 *layer_type = LAYER_MPA|DDP_LLP; 1069 *ecode = MPA_MARKER_ERR; 1070 break; 1071 case T4_ERR_PDU_LEN_ERR: 1072 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1073 *ecode = DDPU_MSG_TOOBIG; 1074 break; 1075 case T4_ERR_DDP_VERSION: 1076 if (tagged) { 1077 *layer_type = LAYER_DDP|DDP_TAGGED_ERR; 1078 *ecode = DDPT_INV_VERS; 1079 } else { 1080 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1081 *ecode = DDPU_INV_VERS; 1082 } 1083 break; 1084 case T4_ERR_RDMA_VERSION: 1085 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 1086 *ecode = RDMAP_INV_VERS; 1087 break; 1088 case T4_ERR_OPCODE: 1089 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 1090 *ecode = RDMAP_INV_OPCODE; 1091 break; 1092 case T4_ERR_DDP_QUEUE_NUM: 1093 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1094 *ecode = DDPU_INV_QN; 1095 break; 1096 case T4_ERR_MSN: 1097 case T4_ERR_MSN_GAP: 1098 case T4_ERR_MSN_RANGE: 1099 case T4_ERR_IRD_OVERFLOW: 1100 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1101 *ecode = DDPU_INV_MSN_RANGE; 1102 break; 1103 case T4_ERR_TBIT: 1104 *layer_type = LAYER_DDP|DDP_LOCAL_CATA; 1105 *ecode = 0; 1106 break; 1107 case T4_ERR_MO: 1108 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1109 *ecode = DDPU_INV_MO; 1110 break; 1111 default: 1112 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA; 1113 *ecode = 0; 1114 break; 1115 } 1116 } 1117 1118 static void post_terminate(struct c4iw_qp *qhp, struct t4_cqe *err_cqe, 1119 gfp_t gfp) 1120 { 1121 int ret; 1122 struct fw_ri_wr *wqe; 1123 struct terminate_message *term; 1124 struct wrqe *wr; 1125 struct socket *so = qhp->ep->com.so; 1126 struct inpcb *inp = sotoinpcb(so); 1127 struct tcpcb *tp = intotcpcb(inp); 1128 struct toepcb *toep = tp->t_toe; 1129 1130 CTR4(KTR_IW_CXGBE, "%s qhp %p qid 0x%x tid %u", __func__, qhp, 1131 qhp->wq.sq.qid, qhp->ep->hwtid); 1132 1133 wr = alloc_wrqe(sizeof(*wqe), &toep->ofld_txq->wrq); 1134 if (wr == NULL) 1135 return; 1136 wqe = wrtod(wr); 1137 1138 memset(wqe, 0, sizeof *wqe); 1139 wqe->op_compl = cpu_to_be32(V_FW_WR_OP(FW_RI_WR)); 1140 wqe->flowid_len16 = cpu_to_be32( 1141 V_FW_WR_FLOWID(qhp->ep->hwtid) | 1142 V_FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16))); 1143 1144 wqe->u.terminate.type = FW_RI_TYPE_TERMINATE; 1145 wqe->u.terminate.immdlen = cpu_to_be32(sizeof *term); 1146 term = (struct terminate_message *)wqe->u.terminate.termmsg; 1147 if (qhp->attr.layer_etype == (LAYER_MPA|DDP_LLP)) { 1148 term->layer_etype = qhp->attr.layer_etype; 1149 term->ecode = qhp->attr.ecode; 1150 } else 1151 build_term_codes(err_cqe, &term->layer_etype, &term->ecode); 1152 ret = creds(toep, inp, sizeof(*wqe)); 1153 if (ret) { 1154 free_wrqe(wr); 1155 return; 1156 } 1157 t4_wrq_tx(qhp->rhp->rdev.adap, wr); 1158 } 1159 1160 /* Assumes qhp lock is held. */ 1161 static void __flush_qp(struct c4iw_qp *qhp, struct c4iw_cq *rchp, 1162 struct c4iw_cq *schp) 1163 { 1164 int count; 1165 int rq_flushed, sq_flushed; 1166 unsigned long flag; 1167 1168 CTR4(KTR_IW_CXGBE, "%s qhp %p rchp %p schp %p", __func__, qhp, rchp, 1169 schp); 1170 1171 /* locking hierarchy: cq lock first, then qp lock. */ 1172 spin_lock_irqsave(&rchp->lock, flag); 1173 spin_lock(&qhp->lock); 1174 1175 if (qhp->wq.flushed) { 1176 spin_unlock(&qhp->lock); 1177 spin_unlock_irqrestore(&rchp->lock, flag); 1178 return; 1179 } 1180 qhp->wq.flushed = 1; 1181 1182 c4iw_flush_hw_cq(rchp); 1183 c4iw_count_rcqes(&rchp->cq, &qhp->wq, &count); 1184 rq_flushed = c4iw_flush_rq(&qhp->wq, &rchp->cq, count); 1185 spin_unlock(&qhp->lock); 1186 spin_unlock_irqrestore(&rchp->lock, flag); 1187 1188 /* locking hierarchy: cq lock first, then qp lock. */ 1189 spin_lock_irqsave(&schp->lock, flag); 1190 spin_lock(&qhp->lock); 1191 if (schp != rchp) 1192 c4iw_flush_hw_cq(schp); 1193 sq_flushed = c4iw_flush_sq(qhp); 1194 spin_unlock(&qhp->lock); 1195 spin_unlock_irqrestore(&schp->lock, flag); 1196 1197 if (schp == rchp) { 1198 if (t4_clear_cq_armed(&rchp->cq) && 1199 (rq_flushed || sq_flushed)) { 1200 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 1201 (*rchp->ibcq.comp_handler)(&rchp->ibcq, 1202 rchp->ibcq.cq_context); 1203 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 1204 } 1205 } else { 1206 if (t4_clear_cq_armed(&rchp->cq) && rq_flushed) { 1207 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 1208 (*rchp->ibcq.comp_handler)(&rchp->ibcq, 1209 rchp->ibcq.cq_context); 1210 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 1211 } 1212 if (t4_clear_cq_armed(&schp->cq) && sq_flushed) { 1213 spin_lock_irqsave(&schp->comp_handler_lock, flag); 1214 (*schp->ibcq.comp_handler)(&schp->ibcq, 1215 schp->ibcq.cq_context); 1216 spin_unlock_irqrestore(&schp->comp_handler_lock, flag); 1217 } 1218 } 1219 } 1220 1221 static void flush_qp(struct c4iw_qp *qhp) 1222 { 1223 struct c4iw_cq *rchp, *schp; 1224 unsigned long flag; 1225 1226 rchp = to_c4iw_cq(qhp->ibqp.recv_cq); 1227 schp = to_c4iw_cq(qhp->ibqp.send_cq); 1228 1229 t4_set_wq_in_error(&qhp->wq); 1230 if (qhp->ibqp.uobject) { 1231 t4_set_cq_in_error(&rchp->cq); 1232 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 1233 (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context); 1234 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 1235 if (schp != rchp) { 1236 t4_set_cq_in_error(&schp->cq); 1237 spin_lock_irqsave(&schp->comp_handler_lock, flag); 1238 (*schp->ibcq.comp_handler)(&schp->ibcq, 1239 schp->ibcq.cq_context); 1240 spin_unlock_irqrestore(&schp->comp_handler_lock, flag); 1241 } 1242 return; 1243 } 1244 __flush_qp(qhp, rchp, schp); 1245 } 1246 1247 static int 1248 rdma_fini(struct c4iw_dev *rhp, struct c4iw_qp *qhp, struct c4iw_ep *ep) 1249 { 1250 struct c4iw_rdev *rdev = &rhp->rdev; 1251 struct adapter *sc = rdev->adap; 1252 struct fw_ri_wr *wqe; 1253 int ret; 1254 struct wrqe *wr; 1255 struct socket *so = ep->com.so; 1256 struct inpcb *inp = sotoinpcb(so); 1257 struct tcpcb *tp = intotcpcb(inp); 1258 struct toepcb *toep = tp->t_toe; 1259 1260 KASSERT(rhp == qhp->rhp && ep == qhp->ep, ("%s: EDOOFUS", __func__)); 1261 1262 CTR5(KTR_IW_CXGBE, "%s qhp %p qid 0x%x ep %p tid %u", __func__, qhp, 1263 qhp->wq.sq.qid, ep, ep->hwtid); 1264 1265 wr = alloc_wrqe(sizeof(*wqe), &toep->ofld_txq->wrq); 1266 if (wr == NULL) 1267 return (0); 1268 wqe = wrtod(wr); 1269 1270 memset(wqe, 0, sizeof *wqe); 1271 1272 wqe->op_compl = cpu_to_be32(V_FW_WR_OP(FW_RI_WR) | F_FW_WR_COMPL); 1273 wqe->flowid_len16 = cpu_to_be32(V_FW_WR_FLOWID(ep->hwtid) | 1274 V_FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16))); 1275 wqe->cookie = (unsigned long) &ep->com.wr_wait; 1276 wqe->u.fini.type = FW_RI_TYPE_FINI; 1277 1278 c4iw_init_wr_wait(&ep->com.wr_wait); 1279 1280 ret = creds(toep, inp, sizeof(*wqe)); 1281 if (ret) { 1282 free_wrqe(wr); 1283 return ret; 1284 } 1285 t4_wrq_tx(sc, wr); 1286 1287 ret = c4iw_wait_for_reply(rdev, &ep->com.wr_wait, ep->hwtid, 1288 qhp->wq.sq.qid, ep->com.so, __func__); 1289 return ret; 1290 } 1291 1292 static void build_rtr_msg(u8 p2p_type, struct fw_ri_init *init) 1293 { 1294 CTR2(KTR_IW_CXGBE, "%s p2p_type = %d", __func__, p2p_type); 1295 memset(&init->u, 0, sizeof init->u); 1296 switch (p2p_type) { 1297 case FW_RI_INIT_P2PTYPE_RDMA_WRITE: 1298 init->u.write.opcode = FW_RI_RDMA_WRITE_WR; 1299 init->u.write.stag_sink = cpu_to_be32(1); 1300 init->u.write.to_sink = cpu_to_be64(1); 1301 init->u.write.u.immd_src[0].op = FW_RI_DATA_IMMD; 1302 init->u.write.len16 = DIV_ROUND_UP(sizeof init->u.write + 1303 sizeof(struct fw_ri_immd), 1304 16); 1305 break; 1306 case FW_RI_INIT_P2PTYPE_READ_REQ: 1307 init->u.write.opcode = FW_RI_RDMA_READ_WR; 1308 init->u.read.stag_src = cpu_to_be32(1); 1309 init->u.read.to_src_lo = cpu_to_be32(1); 1310 init->u.read.stag_sink = cpu_to_be32(1); 1311 init->u.read.to_sink_lo = cpu_to_be32(1); 1312 init->u.read.len16 = DIV_ROUND_UP(sizeof init->u.read, 16); 1313 break; 1314 } 1315 } 1316 1317 static int 1318 creds(struct toepcb *toep, struct inpcb *inp, size_t wrsize) 1319 { 1320 struct ofld_tx_sdesc *txsd; 1321 1322 CTR3(KTR_IW_CXGBE, "%s:creB %p %u", __func__, toep , wrsize); 1323 INP_WLOCK(inp); 1324 if ((inp->inp_flags & INP_DROPPED) != 0) { 1325 INP_WUNLOCK(inp); 1326 return (EINVAL); 1327 } 1328 txsd = &toep->txsd[toep->txsd_pidx]; 1329 KASSERT(howmany(wrsize, 16) <= MAX_OFLD_TX_SDESC_CREDITS, 1330 ("%s: tx_credits %zu too large", __func__, howmany(wrsize, 16))); 1331 txsd->tx_credits = howmany(wrsize, 16); 1332 txsd->plen = 0; 1333 KASSERT(toep->tx_credits >= txsd->tx_credits && toep->txsd_avail > 0, 1334 ("%s: not enough credits (%d)", __func__, toep->tx_credits)); 1335 toep->tx_credits -= txsd->tx_credits; 1336 if (__predict_false(++toep->txsd_pidx == toep->txsd_total)) 1337 toep->txsd_pidx = 0; 1338 toep->txsd_avail--; 1339 INP_WUNLOCK(inp); 1340 CTR5(KTR_IW_CXGBE, "%s:creE %p %u %u %u", __func__, toep , 1341 txsd->tx_credits, toep->tx_credits, toep->txsd_pidx); 1342 return (0); 1343 } 1344 1345 static int rdma_init(struct c4iw_dev *rhp, struct c4iw_qp *qhp) 1346 { 1347 struct fw_ri_wr *wqe; 1348 int ret; 1349 struct wrqe *wr; 1350 struct c4iw_ep *ep = qhp->ep; 1351 struct c4iw_rdev *rdev = &qhp->rhp->rdev; 1352 struct adapter *sc = rdev->adap; 1353 struct socket *so = ep->com.so; 1354 struct inpcb *inp = sotoinpcb(so); 1355 struct tcpcb *tp = intotcpcb(inp); 1356 struct toepcb *toep = tp->t_toe; 1357 1358 CTR5(KTR_IW_CXGBE, "%s qhp %p qid 0x%x ep %p tid %u", __func__, qhp, 1359 qhp->wq.sq.qid, ep, ep->hwtid); 1360 1361 wr = alloc_wrqe(sizeof(*wqe), &toep->ofld_txq->wrq); 1362 if (wr == NULL) 1363 return (0); 1364 wqe = wrtod(wr); 1365 ret = alloc_ird(rhp, qhp->attr.max_ird); 1366 if (ret) { 1367 qhp->attr.max_ird = 0; 1368 free_wrqe(wr); 1369 return ret; 1370 } 1371 1372 memset(wqe, 0, sizeof *wqe); 1373 1374 wqe->op_compl = cpu_to_be32( 1375 V_FW_WR_OP(FW_RI_WR) | 1376 F_FW_WR_COMPL); 1377 wqe->flowid_len16 = cpu_to_be32(V_FW_WR_FLOWID(ep->hwtid) | 1378 V_FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16))); 1379 1380 wqe->cookie = (unsigned long) &ep->com.wr_wait; 1381 1382 wqe->u.init.type = FW_RI_TYPE_INIT; 1383 wqe->u.init.mpareqbit_p2ptype = 1384 V_FW_RI_WR_MPAREQBIT(qhp->attr.mpa_attr.initiator) | 1385 V_FW_RI_WR_P2PTYPE(qhp->attr.mpa_attr.p2p_type); 1386 wqe->u.init.mpa_attrs = FW_RI_MPA_IETF_ENABLE; 1387 if (qhp->attr.mpa_attr.recv_marker_enabled) 1388 wqe->u.init.mpa_attrs |= FW_RI_MPA_RX_MARKER_ENABLE; 1389 if (qhp->attr.mpa_attr.xmit_marker_enabled) 1390 wqe->u.init.mpa_attrs |= FW_RI_MPA_TX_MARKER_ENABLE; 1391 if (qhp->attr.mpa_attr.crc_enabled) 1392 wqe->u.init.mpa_attrs |= FW_RI_MPA_CRC_ENABLE; 1393 1394 wqe->u.init.qp_caps = FW_RI_QP_RDMA_READ_ENABLE | 1395 FW_RI_QP_RDMA_WRITE_ENABLE | 1396 FW_RI_QP_BIND_ENABLE; 1397 if (!qhp->ibqp.uobject) 1398 wqe->u.init.qp_caps |= FW_RI_QP_FAST_REGISTER_ENABLE | 1399 FW_RI_QP_STAG0_ENABLE; 1400 wqe->u.init.nrqe = cpu_to_be16(t4_rqes_posted(&qhp->wq)); 1401 wqe->u.init.pdid = cpu_to_be32(qhp->attr.pd); 1402 wqe->u.init.qpid = cpu_to_be32(qhp->wq.sq.qid); 1403 wqe->u.init.sq_eqid = cpu_to_be32(qhp->wq.sq.qid); 1404 wqe->u.init.rq_eqid = cpu_to_be32(qhp->wq.rq.qid); 1405 wqe->u.init.scqid = cpu_to_be32(qhp->attr.scq); 1406 wqe->u.init.rcqid = cpu_to_be32(qhp->attr.rcq); 1407 wqe->u.init.ord_max = cpu_to_be32(qhp->attr.max_ord); 1408 wqe->u.init.ird_max = cpu_to_be32(qhp->attr.max_ird); 1409 wqe->u.init.iss = cpu_to_be32(ep->snd_seq); 1410 wqe->u.init.irs = cpu_to_be32(ep->rcv_seq); 1411 wqe->u.init.hwrqsize = cpu_to_be32(qhp->wq.rq.rqt_size); 1412 wqe->u.init.hwrqaddr = cpu_to_be32(qhp->wq.rq.rqt_hwaddr - 1413 sc->vres.rq.start); 1414 if (qhp->attr.mpa_attr.initiator) 1415 build_rtr_msg(qhp->attr.mpa_attr.p2p_type, &wqe->u.init); 1416 1417 c4iw_init_wr_wait(&ep->com.wr_wait); 1418 1419 ret = creds(toep, inp, sizeof(*wqe)); 1420 if (ret) { 1421 free_wrqe(wr); 1422 free_ird(rhp, qhp->attr.max_ird); 1423 return ret; 1424 } 1425 t4_wrq_tx(sc, wr); 1426 1427 ret = c4iw_wait_for_reply(rdev, &ep->com.wr_wait, ep->hwtid, 1428 qhp->wq.sq.qid, ep->com.so, __func__); 1429 1430 toep->params.ulp_mode = ULP_MODE_RDMA; 1431 free_ird(rhp, qhp->attr.max_ird); 1432 1433 return ret; 1434 } 1435 1436 int c4iw_modify_qp(struct c4iw_dev *rhp, struct c4iw_qp *qhp, 1437 enum c4iw_qp_attr_mask mask, 1438 struct c4iw_qp_attributes *attrs, 1439 int internal) 1440 { 1441 int ret = 0; 1442 struct c4iw_qp_attributes newattr = qhp->attr; 1443 int disconnect = 0; 1444 int terminate = 0; 1445 int abort = 0; 1446 int free = 0; 1447 struct c4iw_ep *ep = NULL; 1448 1449 CTR5(KTR_IW_CXGBE, "%s qhp %p sqid 0x%x rqid 0x%x ep %p", __func__, qhp, 1450 qhp->wq.sq.qid, qhp->wq.rq.qid, qhp->ep); 1451 CTR3(KTR_IW_CXGBE, "%s state %d -> %d", __func__, qhp->attr.state, 1452 (mask & C4IW_QP_ATTR_NEXT_STATE) ? attrs->next_state : -1); 1453 1454 mutex_lock(&qhp->mutex); 1455 1456 /* Process attr changes if in IDLE */ 1457 if (mask & C4IW_QP_ATTR_VALID_MODIFY) { 1458 if (qhp->attr.state != C4IW_QP_STATE_IDLE) { 1459 ret = -EIO; 1460 goto out; 1461 } 1462 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_READ) 1463 newattr.enable_rdma_read = attrs->enable_rdma_read; 1464 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_WRITE) 1465 newattr.enable_rdma_write = attrs->enable_rdma_write; 1466 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_BIND) 1467 newattr.enable_bind = attrs->enable_bind; 1468 if (mask & C4IW_QP_ATTR_MAX_ORD) { 1469 if (attrs->max_ord > c4iw_max_read_depth) { 1470 ret = -EINVAL; 1471 goto out; 1472 } 1473 newattr.max_ord = attrs->max_ord; 1474 } 1475 if (mask & C4IW_QP_ATTR_MAX_IRD) { 1476 if (attrs->max_ird > cur_max_read_depth(rhp)) { 1477 ret = -EINVAL; 1478 goto out; 1479 } 1480 newattr.max_ird = attrs->max_ird; 1481 } 1482 qhp->attr = newattr; 1483 } 1484 1485 if (!(mask & C4IW_QP_ATTR_NEXT_STATE)) 1486 goto out; 1487 if (qhp->attr.state == attrs->next_state) 1488 goto out; 1489 1490 /* Return EINPROGRESS if QP is already in transition state. 1491 * Eg: CLOSING->IDLE transition or *->ERROR transition. 1492 * This can happen while connection is switching(due to rdma_fini) 1493 * from iWARP/RDDP to TOE mode and any inflight RDMA RX data will 1494 * reach TOE driver -> TCP stack -> iWARP driver. In this way 1495 * iWARP driver keep receiving inflight RDMA RX data until socket 1496 * is closed or aborted. And if iWARP CM is in FPDU sate, then 1497 * it tries to put QP in TERM state and disconnects endpoint. 1498 * But as QP is already in transition state, this event is ignored. 1499 */ 1500 if ((qhp->attr.state >= C4IW_QP_STATE_ERROR) && 1501 (attrs->next_state == C4IW_QP_STATE_TERMINATE)) { 1502 ret = -EINPROGRESS; 1503 goto out; 1504 } 1505 1506 switch (qhp->attr.state) { 1507 case C4IW_QP_STATE_IDLE: 1508 switch (attrs->next_state) { 1509 case C4IW_QP_STATE_RTS: 1510 if (!(mask & C4IW_QP_ATTR_LLP_STREAM_HANDLE)) { 1511 ret = -EINVAL; 1512 goto out; 1513 } 1514 if (!(mask & C4IW_QP_ATTR_MPA_ATTR)) { 1515 ret = -EINVAL; 1516 goto out; 1517 } 1518 qhp->attr.mpa_attr = attrs->mpa_attr; 1519 qhp->attr.llp_stream_handle = attrs->llp_stream_handle; 1520 qhp->ep = qhp->attr.llp_stream_handle; 1521 set_state(qhp, C4IW_QP_STATE_RTS); 1522 1523 /* 1524 * Ref the endpoint here and deref when we 1525 * disassociate the endpoint from the QP. This 1526 * happens in CLOSING->IDLE transition or *->ERROR 1527 * transition. 1528 */ 1529 c4iw_get_ep(&qhp->ep->com); 1530 ret = rdma_init(rhp, qhp); 1531 if (ret) 1532 goto err; 1533 break; 1534 case C4IW_QP_STATE_ERROR: 1535 set_state(qhp, C4IW_QP_STATE_ERROR); 1536 flush_qp(qhp); 1537 break; 1538 default: 1539 ret = -EINVAL; 1540 goto out; 1541 } 1542 break; 1543 case C4IW_QP_STATE_RTS: 1544 switch (attrs->next_state) { 1545 case C4IW_QP_STATE_CLOSING: 1546 BUG_ON(kref_read(&qhp->ep->com.kref) < 2); 1547 t4_set_wq_in_error(&qhp->wq); 1548 set_state(qhp, C4IW_QP_STATE_CLOSING); 1549 ep = qhp->ep; 1550 if (!internal) { 1551 abort = 0; 1552 disconnect = 1; 1553 c4iw_get_ep(&qhp->ep->com); 1554 } 1555 ret = rdma_fini(rhp, qhp, ep); 1556 if (ret) 1557 goto err; 1558 break; 1559 case C4IW_QP_STATE_TERMINATE: 1560 t4_set_wq_in_error(&qhp->wq); 1561 set_state(qhp, C4IW_QP_STATE_TERMINATE); 1562 qhp->attr.layer_etype = attrs->layer_etype; 1563 qhp->attr.ecode = attrs->ecode; 1564 ep = qhp->ep; 1565 if (!internal) { 1566 c4iw_get_ep(&qhp->ep->com); 1567 terminate = 1; 1568 disconnect = 1; 1569 } else { 1570 terminate = qhp->attr.send_term; 1571 ret = rdma_fini(rhp, qhp, ep); 1572 if (ret) 1573 goto err; 1574 } 1575 break; 1576 case C4IW_QP_STATE_ERROR: 1577 t4_set_wq_in_error(&qhp->wq); 1578 set_state(qhp, C4IW_QP_STATE_ERROR); 1579 if (!internal) { 1580 abort = 1; 1581 disconnect = 1; 1582 ep = qhp->ep; 1583 c4iw_get_ep(&qhp->ep->com); 1584 } 1585 goto err; 1586 break; 1587 default: 1588 ret = -EINVAL; 1589 goto out; 1590 } 1591 break; 1592 case C4IW_QP_STATE_CLOSING: 1593 1594 /* 1595 * Allow kernel users to move to ERROR for qp draining. 1596 */ 1597 if (!internal && (qhp->ibqp.uobject || attrs->next_state != 1598 C4IW_QP_STATE_ERROR)) { 1599 ret = -EINVAL; 1600 goto out; 1601 } 1602 switch (attrs->next_state) { 1603 case C4IW_QP_STATE_IDLE: 1604 flush_qp(qhp); 1605 set_state(qhp, C4IW_QP_STATE_IDLE); 1606 qhp->attr.llp_stream_handle = NULL; 1607 c4iw_put_ep(&qhp->ep->com); 1608 qhp->ep = NULL; 1609 wake_up(&qhp->wait); 1610 break; 1611 case C4IW_QP_STATE_ERROR: 1612 goto err; 1613 default: 1614 ret = -EINVAL; 1615 goto err; 1616 } 1617 break; 1618 case C4IW_QP_STATE_ERROR: 1619 if (attrs->next_state != C4IW_QP_STATE_IDLE) { 1620 ret = -EINVAL; 1621 goto out; 1622 } 1623 if (!t4_sq_empty(&qhp->wq) || !t4_rq_empty(&qhp->wq)) { 1624 ret = -EINVAL; 1625 goto out; 1626 } 1627 set_state(qhp, C4IW_QP_STATE_IDLE); 1628 break; 1629 case C4IW_QP_STATE_TERMINATE: 1630 if (!internal) { 1631 ret = -EINVAL; 1632 goto out; 1633 } 1634 goto err; 1635 break; 1636 default: 1637 printf("%s in a bad state %d\n", 1638 __func__, qhp->attr.state); 1639 ret = -EINVAL; 1640 goto err; 1641 break; 1642 } 1643 goto out; 1644 err: 1645 CTR3(KTR_IW_CXGBE, "%s disassociating ep %p qpid 0x%x", __func__, 1646 qhp->ep, qhp->wq.sq.qid); 1647 1648 /* disassociate the LLP connection */ 1649 qhp->attr.llp_stream_handle = NULL; 1650 if (!ep) 1651 ep = qhp->ep; 1652 qhp->ep = NULL; 1653 set_state(qhp, C4IW_QP_STATE_ERROR); 1654 free = 1; 1655 abort = 1; 1656 BUG_ON(!ep); 1657 flush_qp(qhp); 1658 wake_up(&qhp->wait); 1659 out: 1660 mutex_unlock(&qhp->mutex); 1661 1662 if (terminate) 1663 post_terminate(qhp, NULL, internal ? GFP_ATOMIC : GFP_KERNEL); 1664 1665 /* 1666 * If disconnect is 1, then we need to initiate a disconnect 1667 * on the EP. This can be a normal close (RTS->CLOSING) or 1668 * an abnormal close (RTS/CLOSING->ERROR). 1669 */ 1670 if (disconnect) { 1671 __c4iw_ep_disconnect(ep, abort, internal ? GFP_ATOMIC : 1672 GFP_KERNEL); 1673 c4iw_put_ep(&ep->com); 1674 } 1675 1676 /* 1677 * If free is 1, then we've disassociated the EP from the QP 1678 * and we need to dereference the EP. 1679 */ 1680 if (free) 1681 c4iw_put_ep(&ep->com); 1682 CTR2(KTR_IW_CXGBE, "%s exit state %d", __func__, qhp->attr.state); 1683 return ret; 1684 } 1685 1686 int c4iw_destroy_qp(struct ib_qp *ib_qp, struct ib_udata *udata) 1687 { 1688 struct c4iw_dev *rhp; 1689 struct c4iw_qp *qhp; 1690 struct c4iw_qp_attributes attrs; 1691 1692 CTR2(KTR_IW_CXGBE, "%s ib_qp %p", __func__, ib_qp); 1693 qhp = to_c4iw_qp(ib_qp); 1694 rhp = qhp->rhp; 1695 1696 attrs.next_state = C4IW_QP_STATE_ERROR; 1697 if (qhp->attr.state == C4IW_QP_STATE_TERMINATE) 1698 c4iw_modify_qp(rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 1699 else 1700 c4iw_modify_qp(rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 0); 1701 wait_event(qhp->wait, !qhp->ep); 1702 1703 remove_handle(rhp, &rhp->qpidr, qhp->wq.sq.qid); 1704 1705 free_ird(rhp, qhp->attr.max_ird); 1706 c4iw_qp_rem_ref(ib_qp); 1707 1708 CTR3(KTR_IW_CXGBE, "%s ib_qp %p qpid 0x%0x", __func__, ib_qp, 1709 qhp->wq.sq.qid); 1710 return 0; 1711 } 1712 1713 struct ib_qp * 1714 c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs, 1715 struct ib_udata *udata) 1716 { 1717 struct c4iw_dev *rhp; 1718 struct c4iw_qp *qhp; 1719 struct c4iw_pd *php; 1720 struct c4iw_cq *schp; 1721 struct c4iw_cq *rchp; 1722 struct c4iw_create_qp_resp uresp; 1723 unsigned int sqsize, rqsize; 1724 struct c4iw_ucontext *ucontext; 1725 int ret; 1726 struct c4iw_mm_entry *sq_key_mm = NULL, *rq_key_mm = NULL; 1727 struct c4iw_mm_entry *sq_db_key_mm = NULL, *rq_db_key_mm = NULL; 1728 1729 CTR2(KTR_IW_CXGBE, "%s ib_pd %p", __func__, pd); 1730 1731 if (attrs->qp_type != IB_QPT_RC) 1732 return ERR_PTR(-EINVAL); 1733 1734 php = to_c4iw_pd(pd); 1735 rhp = php->rhp; 1736 schp = get_chp(rhp, ((struct c4iw_cq *)attrs->send_cq)->cq.cqid); 1737 rchp = get_chp(rhp, ((struct c4iw_cq *)attrs->recv_cq)->cq.cqid); 1738 if (!schp || !rchp) 1739 return ERR_PTR(-EINVAL); 1740 1741 if (attrs->cap.max_inline_data > T4_MAX_SEND_INLINE) 1742 return ERR_PTR(-EINVAL); 1743 1744 if (attrs->cap.max_recv_wr > rhp->rdev.hw_queue.t4_max_rq_size) 1745 return ERR_PTR(-E2BIG); 1746 rqsize = attrs->cap.max_recv_wr + 1; 1747 if (rqsize < 8) 1748 rqsize = 8; 1749 1750 if (attrs->cap.max_send_wr > rhp->rdev.hw_queue.t4_max_sq_size) 1751 return ERR_PTR(-E2BIG); 1752 sqsize = attrs->cap.max_send_wr + 1; 1753 if (sqsize < 8) 1754 sqsize = 8; 1755 1756 ucontext = pd->uobject ? to_c4iw_ucontext(pd->uobject->context) : NULL; 1757 1758 qhp = kzalloc(sizeof(*qhp), GFP_KERNEL); 1759 if (!qhp) 1760 return ERR_PTR(-ENOMEM); 1761 qhp->wq.sq.size = sqsize; 1762 qhp->wq.sq.memsize = 1763 (sqsize + rhp->rdev.hw_queue.t4_eq_status_entries) * 1764 sizeof(*qhp->wq.sq.queue) + 16 * sizeof(__be64); 1765 qhp->wq.sq.flush_cidx = -1; 1766 qhp->wq.rq.size = rqsize; 1767 qhp->wq.rq.memsize = 1768 (rqsize + rhp->rdev.hw_queue.t4_eq_status_entries) * 1769 sizeof(*qhp->wq.rq.queue); 1770 1771 if (ucontext) { 1772 qhp->wq.sq.memsize = roundup(qhp->wq.sq.memsize, PAGE_SIZE); 1773 qhp->wq.rq.memsize = roundup(qhp->wq.rq.memsize, PAGE_SIZE); 1774 } 1775 1776 CTR5(KTR_IW_CXGBE, "%s sqsize %u sqmemsize %zu rqsize %u rqmemsize %zu", 1777 __func__, sqsize, qhp->wq.sq.memsize, rqsize, qhp->wq.rq.memsize); 1778 1779 ret = create_qp(&rhp->rdev, &qhp->wq, &schp->cq, &rchp->cq, 1780 ucontext ? &ucontext->uctx : &rhp->rdev.uctx); 1781 if (ret) 1782 goto err1; 1783 1784 attrs->cap.max_recv_wr = rqsize - 1; 1785 attrs->cap.max_send_wr = sqsize - 1; 1786 attrs->cap.max_inline_data = T4_MAX_SEND_INLINE; 1787 1788 qhp->rhp = rhp; 1789 qhp->attr.pd = php->pdid; 1790 qhp->attr.scq = ((struct c4iw_cq *) attrs->send_cq)->cq.cqid; 1791 qhp->attr.rcq = ((struct c4iw_cq *) attrs->recv_cq)->cq.cqid; 1792 qhp->attr.sq_num_entries = attrs->cap.max_send_wr; 1793 qhp->attr.rq_num_entries = attrs->cap.max_recv_wr; 1794 qhp->attr.sq_max_sges = attrs->cap.max_send_sge; 1795 qhp->attr.sq_max_sges_rdma_write = attrs->cap.max_send_sge; 1796 qhp->attr.rq_max_sges = attrs->cap.max_recv_sge; 1797 qhp->attr.state = C4IW_QP_STATE_IDLE; 1798 qhp->attr.next_state = C4IW_QP_STATE_IDLE; 1799 qhp->attr.enable_rdma_read = 1; 1800 qhp->attr.enable_rdma_write = 1; 1801 qhp->attr.enable_bind = 1; 1802 qhp->attr.max_ord = 0; 1803 qhp->attr.max_ird = 0; 1804 qhp->sq_sig_all = attrs->sq_sig_type == IB_SIGNAL_ALL_WR; 1805 spin_lock_init(&qhp->lock); 1806 mutex_init(&qhp->mutex); 1807 init_waitqueue_head(&qhp->wait); 1808 kref_init(&qhp->kref); 1809 INIT_WORK(&qhp->free_work, free_qp_work); 1810 1811 ret = insert_handle(rhp, &rhp->qpidr, qhp, qhp->wq.sq.qid); 1812 if (ret) 1813 goto err2; 1814 1815 if (udata) { 1816 sq_key_mm = kmalloc(sizeof(*sq_key_mm), GFP_KERNEL); 1817 if (!sq_key_mm) { 1818 ret = -ENOMEM; 1819 goto err3; 1820 } 1821 rq_key_mm = kmalloc(sizeof(*rq_key_mm), GFP_KERNEL); 1822 if (!rq_key_mm) { 1823 ret = -ENOMEM; 1824 goto err4; 1825 } 1826 sq_db_key_mm = kmalloc(sizeof(*sq_db_key_mm), GFP_KERNEL); 1827 if (!sq_db_key_mm) { 1828 ret = -ENOMEM; 1829 goto err5; 1830 } 1831 rq_db_key_mm = kmalloc(sizeof(*rq_db_key_mm), GFP_KERNEL); 1832 if (!rq_db_key_mm) { 1833 ret = -ENOMEM; 1834 goto err6; 1835 } 1836 uresp.flags = 0; 1837 uresp.qid_mask = rhp->rdev.qpmask; 1838 uresp.sqid = qhp->wq.sq.qid; 1839 uresp.sq_size = qhp->wq.sq.size; 1840 uresp.sq_memsize = qhp->wq.sq.memsize; 1841 uresp.rqid = qhp->wq.rq.qid; 1842 uresp.rq_size = qhp->wq.rq.size; 1843 uresp.rq_memsize = qhp->wq.rq.memsize; 1844 spin_lock(&ucontext->mmap_lock); 1845 uresp.ma_sync_key = 0; 1846 uresp.sq_key = ucontext->key; 1847 ucontext->key += PAGE_SIZE; 1848 uresp.rq_key = ucontext->key; 1849 ucontext->key += PAGE_SIZE; 1850 uresp.sq_db_gts_key = ucontext->key; 1851 ucontext->key += PAGE_SIZE; 1852 uresp.rq_db_gts_key = ucontext->key; 1853 ucontext->key += PAGE_SIZE; 1854 spin_unlock(&ucontext->mmap_lock); 1855 ret = ib_copy_to_udata(udata, &uresp, sizeof uresp); 1856 if (ret) 1857 goto err7; 1858 sq_key_mm->key = uresp.sq_key; 1859 sq_key_mm->addr = qhp->wq.sq.phys_addr; 1860 sq_key_mm->len = PAGE_ALIGN(qhp->wq.sq.memsize); 1861 CTR4(KTR_IW_CXGBE, "%s sq_key_mm %x, %x, %d", __func__, 1862 sq_key_mm->key, sq_key_mm->addr, 1863 sq_key_mm->len); 1864 insert_mmap(ucontext, sq_key_mm); 1865 rq_key_mm->key = uresp.rq_key; 1866 rq_key_mm->addr = qhp->wq.rq.phys_addr; 1867 rq_key_mm->len = PAGE_ALIGN(qhp->wq.rq.memsize); 1868 CTR4(KTR_IW_CXGBE, "%s rq_key_mm %x, %x, %d", __func__, 1869 rq_key_mm->key, rq_key_mm->addr, 1870 rq_key_mm->len); 1871 insert_mmap(ucontext, rq_key_mm); 1872 sq_db_key_mm->key = uresp.sq_db_gts_key; 1873 sq_db_key_mm->addr = (u64)qhp->wq.sq.bar2_pa; 1874 sq_db_key_mm->len = PAGE_SIZE; 1875 CTR4(KTR_IW_CXGBE, "%s sq_db_key_mm %x, %x, %d", __func__, 1876 sq_db_key_mm->key, sq_db_key_mm->addr, 1877 sq_db_key_mm->len); 1878 insert_mmap(ucontext, sq_db_key_mm); 1879 rq_db_key_mm->key = uresp.rq_db_gts_key; 1880 rq_db_key_mm->addr = (u64)qhp->wq.rq.bar2_pa; 1881 rq_db_key_mm->len = PAGE_SIZE; 1882 CTR4(KTR_IW_CXGBE, "%s rq_db_key_mm %x, %x, %d", __func__, 1883 rq_db_key_mm->key, rq_db_key_mm->addr, 1884 rq_db_key_mm->len); 1885 insert_mmap(ucontext, rq_db_key_mm); 1886 1887 qhp->ucontext = ucontext; 1888 } 1889 qhp->ibqp.qp_num = qhp->wq.sq.qid; 1890 init_timer(&(qhp->timer)); 1891 1892 CTR5(KTR_IW_CXGBE, "%s sq id %u size %u memsize %zu num_entries %u", 1893 __func__, qhp->wq.sq.qid, 1894 qhp->wq.sq.size, qhp->wq.sq.memsize, attrs->cap.max_send_wr); 1895 CTR5(KTR_IW_CXGBE, "%s rq id %u size %u memsize %zu num_entries %u", 1896 __func__, qhp->wq.rq.qid, 1897 qhp->wq.rq.size, qhp->wq.rq.memsize, attrs->cap.max_recv_wr); 1898 return &qhp->ibqp; 1899 err7: 1900 kfree(rq_db_key_mm); 1901 err6: 1902 kfree(sq_db_key_mm); 1903 err5: 1904 kfree(rq_key_mm); 1905 err4: 1906 kfree(sq_key_mm); 1907 err3: 1908 remove_handle(rhp, &rhp->qpidr, qhp->wq.sq.qid); 1909 err2: 1910 destroy_qp(&rhp->rdev, &qhp->wq, 1911 ucontext ? &ucontext->uctx : &rhp->rdev.uctx); 1912 err1: 1913 kfree(qhp); 1914 return ERR_PTR(ret); 1915 } 1916 1917 int c4iw_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 1918 int attr_mask, struct ib_udata *udata) 1919 { 1920 struct c4iw_dev *rhp; 1921 struct c4iw_qp *qhp; 1922 enum c4iw_qp_attr_mask mask = 0; 1923 struct c4iw_qp_attributes attrs; 1924 1925 CTR2(KTR_IW_CXGBE, "%s ib_qp %p", __func__, ibqp); 1926 1927 /* iwarp does not support the RTR state */ 1928 if ((attr_mask & IB_QP_STATE) && (attr->qp_state == IB_QPS_RTR)) 1929 attr_mask &= ~IB_QP_STATE; 1930 1931 /* Make sure we still have something left to do */ 1932 if (!attr_mask) 1933 return 0; 1934 1935 memset(&attrs, 0, sizeof attrs); 1936 qhp = to_c4iw_qp(ibqp); 1937 rhp = qhp->rhp; 1938 1939 attrs.next_state = c4iw_convert_state(attr->qp_state); 1940 attrs.enable_rdma_read = (attr->qp_access_flags & 1941 IB_ACCESS_REMOTE_READ) ? 1 : 0; 1942 attrs.enable_rdma_write = (attr->qp_access_flags & 1943 IB_ACCESS_REMOTE_WRITE) ? 1 : 0; 1944 attrs.enable_bind = (attr->qp_access_flags & IB_ACCESS_MW_BIND) ? 1 : 0; 1945 1946 1947 mask |= (attr_mask & IB_QP_STATE) ? C4IW_QP_ATTR_NEXT_STATE : 0; 1948 mask |= (attr_mask & IB_QP_ACCESS_FLAGS) ? 1949 (C4IW_QP_ATTR_ENABLE_RDMA_READ | 1950 C4IW_QP_ATTR_ENABLE_RDMA_WRITE | 1951 C4IW_QP_ATTR_ENABLE_RDMA_BIND) : 0; 1952 1953 return c4iw_modify_qp(rhp, qhp, mask, &attrs, 0); 1954 } 1955 1956 struct ib_qp *c4iw_get_qp(struct ib_device *dev, int qpn) 1957 { 1958 CTR3(KTR_IW_CXGBE, "%s ib_dev %p qpn 0x%x", __func__, dev, qpn); 1959 return (struct ib_qp *)get_qhp(to_c4iw_dev(dev), qpn); 1960 } 1961 1962 int c4iw_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 1963 int attr_mask, struct ib_qp_init_attr *init_attr) 1964 { 1965 struct c4iw_qp *qhp = to_c4iw_qp(ibqp); 1966 1967 memset(attr, 0, sizeof *attr); 1968 memset(init_attr, 0, sizeof *init_attr); 1969 attr->qp_state = to_ib_qp_state(qhp->attr.state); 1970 init_attr->cap.max_send_wr = qhp->attr.sq_num_entries; 1971 init_attr->cap.max_recv_wr = qhp->attr.rq_num_entries; 1972 init_attr->cap.max_send_sge = qhp->attr.sq_max_sges; 1973 init_attr->cap.max_recv_sge = qhp->attr.sq_max_sges; 1974 init_attr->cap.max_inline_data = T4_MAX_SEND_INLINE; 1975 init_attr->sq_sig_type = qhp->sq_sig_all ? IB_SIGNAL_ALL_WR : 0; 1976 return 0; 1977 } 1978 #endif 1979