1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 __FBSDID("$FreeBSD$"); 36 37 #include "opt_inet.h" 38 39 #ifdef TCP_OFFLOAD 40 #include <sys/types.h> 41 #include <sys/malloc.h> 42 #include <sys/socket.h> 43 #include <sys/socketvar.h> 44 #include <sys/sockio.h> 45 #include <sys/taskqueue.h> 46 #include <netinet/in.h> 47 #include <net/route.h> 48 49 #include <netinet/in_systm.h> 50 #include <netinet/in_pcb.h> 51 #include <netinet/ip.h> 52 #include <netinet/ip_var.h> 53 #include <netinet/tcp_var.h> 54 #include <netinet/tcp.h> 55 #include <netinet/tcpip.h> 56 57 #include <netinet/toecore.h> 58 59 struct sge_iq; 60 struct rss_header; 61 struct cpl_set_tcb_rpl; 62 #include <linux/types.h> 63 #include "offload.h" 64 #include "tom/t4_tom.h" 65 66 #include "iw_cxgbe.h" 67 #include "user.h" 68 69 static int creds(struct toepcb *toep, struct inpcb *inp, size_t wrsize); 70 static int max_fr_immd = T4_MAX_FR_IMMD;//SYSCTL parameter later... 71 72 static int alloc_ird(struct c4iw_dev *dev, u32 ird) 73 { 74 int ret = 0; 75 76 spin_lock_irq(&dev->lock); 77 if (ird <= dev->avail_ird) 78 dev->avail_ird -= ird; 79 else 80 ret = -ENOMEM; 81 spin_unlock_irq(&dev->lock); 82 83 if (ret) 84 log(LOG_WARNING, "%s: device IRD resources exhausted\n", 85 device_get_nameunit(dev->rdev.adap->dev)); 86 87 return ret; 88 } 89 90 static void free_ird(struct c4iw_dev *dev, int ird) 91 { 92 spin_lock_irq(&dev->lock); 93 dev->avail_ird += ird; 94 spin_unlock_irq(&dev->lock); 95 } 96 97 static void set_state(struct c4iw_qp *qhp, enum c4iw_qp_state state) 98 { 99 unsigned long flag; 100 spin_lock_irqsave(&qhp->lock, flag); 101 qhp->attr.state = state; 102 spin_unlock_irqrestore(&qhp->lock, flag); 103 } 104 105 static int destroy_qp(struct c4iw_rdev *rdev, struct t4_wq *wq, 106 struct c4iw_dev_ucontext *uctx) 107 { 108 struct c4iw_dev *rhp = rdev_to_c4iw_dev(rdev); 109 /* 110 * uP clears EQ contexts when the connection exits rdma mode, 111 * so no need to post a RESET WR for these EQs. 112 */ 113 dma_free_coherent(rhp->ibdev.dma_device, 114 wq->rq.memsize, wq->rq.queue, 115 dma_unmap_addr(&wq->rq, mapping)); 116 dma_free_coherent(rhp->ibdev.dma_device, 117 wq->sq.memsize, wq->sq.queue, 118 dma_unmap_addr(&wq->sq, mapping)); 119 c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size); 120 kfree(wq->rq.sw_rq); 121 kfree(wq->sq.sw_sq); 122 c4iw_put_qpid(rdev, wq->rq.qid, uctx); 123 c4iw_put_qpid(rdev, wq->sq.qid, uctx); 124 return 0; 125 } 126 127 static int create_qp(struct c4iw_rdev *rdev, struct t4_wq *wq, 128 struct t4_cq *rcq, struct t4_cq *scq, 129 struct c4iw_dev_ucontext *uctx) 130 { 131 struct adapter *sc = rdev->adap; 132 struct c4iw_dev *rhp = rdev_to_c4iw_dev(rdev); 133 int user = (uctx != &rdev->uctx); 134 struct fw_ri_res_wr *res_wr; 135 struct fw_ri_res *res; 136 int wr_len; 137 struct c4iw_wr_wait wr_wait; 138 int ret = 0; 139 int eqsize; 140 struct wrqe *wr; 141 u64 sq_bar2_qoffset = 0, rq_bar2_qoffset = 0; 142 143 wq->sq.qid = c4iw_get_qpid(rdev, uctx); 144 if (!wq->sq.qid) 145 return -ENOMEM; 146 147 wq->rq.qid = c4iw_get_qpid(rdev, uctx); 148 if (!wq->rq.qid) { 149 ret = -ENOMEM; 150 goto free_sq_qid; 151 } 152 153 if (!user) { 154 wq->sq.sw_sq = kzalloc(wq->sq.size * sizeof *wq->sq.sw_sq, 155 GFP_KERNEL); 156 if (!wq->sq.sw_sq) { 157 ret = -ENOMEM; 158 goto free_rq_qid; 159 } 160 161 wq->rq.sw_rq = kzalloc(wq->rq.size * sizeof *wq->rq.sw_rq, 162 GFP_KERNEL); 163 if (!wq->rq.sw_rq) { 164 ret = -ENOMEM; 165 goto free_sw_sq; 166 } 167 } 168 169 /* 170 * RQT must be a power of 2 and at least 16 deep. 171 */ 172 wq->rq.rqt_size = roundup_pow_of_two(max_t(u16, wq->rq.size, 16)); 173 wq->rq.rqt_hwaddr = c4iw_rqtpool_alloc(rdev, wq->rq.rqt_size); 174 if (!wq->rq.rqt_hwaddr) { 175 ret = -ENOMEM; 176 goto free_sw_rq; 177 } 178 179 /*QP memory, allocate DMAable memory for Send & Receive Queues */ 180 wq->sq.queue = dma_alloc_coherent(rhp->ibdev.dma_device, wq->sq.memsize, 181 &(wq->sq.dma_addr), GFP_KERNEL); 182 if (!wq->sq.queue) { 183 ret = -ENOMEM; 184 goto free_hwaddr; 185 } 186 wq->sq.phys_addr = vtophys(wq->sq.queue); 187 dma_unmap_addr_set(&wq->sq, mapping, wq->sq.dma_addr); 188 memset(wq->sq.queue, 0, wq->sq.memsize); 189 190 wq->rq.queue = dma_alloc_coherent(rhp->ibdev.dma_device, 191 wq->rq.memsize, &(wq->rq.dma_addr), GFP_KERNEL); 192 if (!wq->rq.queue) { 193 ret = -ENOMEM; 194 goto free_sq_dma; 195 } 196 wq->rq.phys_addr = vtophys(wq->rq.queue); 197 dma_unmap_addr_set(&wq->rq, mapping, wq->rq.dma_addr); 198 memset(wq->rq.queue, 0, wq->rq.memsize); 199 200 CTR5(KTR_IW_CXGBE, 201 "%s QP sq base va 0x%p pa 0x%llx rq base va 0x%p pa 0x%llx", 202 __func__, 203 wq->sq.queue, (unsigned long long)wq->sq.phys_addr, 204 wq->rq.queue, (unsigned long long)wq->rq.phys_addr); 205 206 /* Doorbell/WC regions, determine the BAR2 queue offset and qid. */ 207 t4_bar2_sge_qregs(rdev->adap, wq->sq.qid, T4_BAR2_QTYPE_EGRESS, user, 208 &sq_bar2_qoffset, &wq->sq.bar2_qid); 209 t4_bar2_sge_qregs(rdev->adap, wq->rq.qid, T4_BAR2_QTYPE_EGRESS, user, 210 &rq_bar2_qoffset, &wq->rq.bar2_qid); 211 212 if (user) { 213 /* Compute BAR2 DB/WC physical address(page-aligned) for 214 * Userspace mapping. 215 */ 216 wq->sq.bar2_pa = (rdev->bar2_pa + sq_bar2_qoffset) & PAGE_MASK; 217 wq->rq.bar2_pa = (rdev->bar2_pa + rq_bar2_qoffset) & PAGE_MASK; 218 CTR3(KTR_IW_CXGBE, 219 "%s BAR2 DB/WC sq base pa 0x%llx rq base pa 0x%llx", 220 __func__, (unsigned long long)wq->sq.bar2_pa, 221 (unsigned long long)wq->rq.bar2_pa); 222 } else { 223 /* Compute BAR2 DB/WC virtual address to access in kernel. */ 224 wq->sq.bar2_va = (void __iomem *)((u64)rdev->bar2_kva + 225 sq_bar2_qoffset); 226 wq->rq.bar2_va = (void __iomem *)((u64)rdev->bar2_kva + 227 rq_bar2_qoffset); 228 CTR3(KTR_IW_CXGBE, "%s BAR2 DB/WC sq base va %p rq base va %p", 229 __func__, (unsigned long long)wq->sq.bar2_va, 230 (unsigned long long)wq->rq.bar2_va); 231 } 232 233 wq->rdev = rdev; 234 wq->rq.msn = 1; 235 236 /* build fw_ri_res_wr */ 237 wr_len = sizeof *res_wr + 2 * sizeof *res; 238 239 wr = alloc_wrqe(wr_len, &sc->sge.ctrlq[0]); 240 if (wr == NULL) { 241 ret = -ENOMEM; 242 goto free_rq_dma; 243 } 244 res_wr = wrtod(wr); 245 246 memset(res_wr, 0, wr_len); 247 res_wr->op_nres = cpu_to_be32( 248 V_FW_WR_OP(FW_RI_RES_WR) | 249 V_FW_RI_RES_WR_NRES(2) | 250 F_FW_WR_COMPL); 251 res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16)); 252 res_wr->cookie = (unsigned long) &wr_wait; 253 res = res_wr->res; 254 res->u.sqrq.restype = FW_RI_RES_TYPE_SQ; 255 res->u.sqrq.op = FW_RI_RES_OP_WRITE; 256 257 /* eqsize is the number of 64B entries plus the status page size. */ 258 eqsize = wq->sq.size * T4_SQ_NUM_SLOTS + 259 rdev->hw_queue.t4_eq_status_entries; 260 261 res->u.sqrq.fetchszm_to_iqid = cpu_to_be32( 262 V_FW_RI_RES_WR_HOSTFCMODE(0) | /* no host cidx updates */ 263 V_FW_RI_RES_WR_CPRIO(0) | /* don't keep in chip cache */ 264 V_FW_RI_RES_WR_PCIECHN(0) | /* set by uP at ri_init time */ 265 V_FW_RI_RES_WR_IQID(scq->cqid)); 266 res->u.sqrq.dcaen_to_eqsize = cpu_to_be32( 267 V_FW_RI_RES_WR_DCAEN(0) | 268 V_FW_RI_RES_WR_DCACPU(0) | 269 V_FW_RI_RES_WR_FBMIN(chip_id(sc) <= CHELSIO_T5 ? 270 X_FETCHBURSTMIN_64B : X_FETCHBURSTMIN_64B_T6) | 271 V_FW_RI_RES_WR_FBMAX(3) | 272 V_FW_RI_RES_WR_CIDXFTHRESHO(0) | 273 V_FW_RI_RES_WR_CIDXFTHRESH(0) | 274 V_FW_RI_RES_WR_EQSIZE(eqsize)); 275 res->u.sqrq.eqid = cpu_to_be32(wq->sq.qid); 276 res->u.sqrq.eqaddr = cpu_to_be64(wq->sq.dma_addr); 277 res++; 278 res->u.sqrq.restype = FW_RI_RES_TYPE_RQ; 279 res->u.sqrq.op = FW_RI_RES_OP_WRITE; 280 281 /* eqsize is the number of 64B entries plus the status page size. */ 282 eqsize = wq->rq.size * T4_RQ_NUM_SLOTS + 283 rdev->hw_queue.t4_eq_status_entries; 284 res->u.sqrq.fetchszm_to_iqid = cpu_to_be32( 285 V_FW_RI_RES_WR_HOSTFCMODE(0) | /* no host cidx updates */ 286 V_FW_RI_RES_WR_CPRIO(0) | /* don't keep in chip cache */ 287 V_FW_RI_RES_WR_PCIECHN(0) | /* set by uP at ri_init time */ 288 V_FW_RI_RES_WR_IQID(rcq->cqid)); 289 res->u.sqrq.dcaen_to_eqsize = cpu_to_be32( 290 V_FW_RI_RES_WR_DCAEN(0) | 291 V_FW_RI_RES_WR_DCACPU(0) | 292 V_FW_RI_RES_WR_FBMIN(chip_id(sc) <= CHELSIO_T5 ? 293 X_FETCHBURSTMIN_64B : X_FETCHBURSTMIN_64B_T6) | 294 V_FW_RI_RES_WR_FBMAX(3) | 295 V_FW_RI_RES_WR_CIDXFTHRESHO(0) | 296 V_FW_RI_RES_WR_CIDXFTHRESH(0) | 297 V_FW_RI_RES_WR_EQSIZE(eqsize)); 298 res->u.sqrq.eqid = cpu_to_be32(wq->rq.qid); 299 res->u.sqrq.eqaddr = cpu_to_be64(wq->rq.dma_addr); 300 301 c4iw_init_wr_wait(&wr_wait); 302 303 t4_wrq_tx(sc, wr); 304 ret = c4iw_wait_for_reply(rdev, &wr_wait, 0, wq->sq.qid, 305 NULL, __func__); 306 if (ret) 307 goto free_rq_dma; 308 309 CTR5(KTR_IW_CXGBE, 310 "%s sqid 0x%x rqid 0x%x kdb 0x%p squdb 0x%llx rqudb 0x%llx", 311 __func__, wq->sq.qid, wq->rq.qid, 312 (unsigned long long)wq->sq.bar2_va, 313 (unsigned long long)wq->rq.bar2_va); 314 315 return 0; 316 free_rq_dma: 317 dma_free_coherent(rhp->ibdev.dma_device, 318 wq->rq.memsize, wq->rq.queue, 319 dma_unmap_addr(&wq->rq, mapping)); 320 free_sq_dma: 321 dma_free_coherent(rhp->ibdev.dma_device, 322 wq->sq.memsize, wq->sq.queue, 323 dma_unmap_addr(&wq->sq, mapping)); 324 free_hwaddr: 325 c4iw_rqtpool_free(rdev, wq->rq.rqt_hwaddr, wq->rq.rqt_size); 326 free_sw_rq: 327 kfree(wq->rq.sw_rq); 328 free_sw_sq: 329 kfree(wq->sq.sw_sq); 330 free_rq_qid: 331 c4iw_put_qpid(rdev, wq->rq.qid, uctx); 332 free_sq_qid: 333 c4iw_put_qpid(rdev, wq->sq.qid, uctx); 334 return ret; 335 } 336 337 static int build_immd(struct t4_sq *sq, struct fw_ri_immd *immdp, 338 struct ib_send_wr *wr, int max, u32 *plenp) 339 { 340 u8 *dstp, *srcp; 341 u32 plen = 0; 342 int i; 343 int rem, len; 344 345 dstp = (u8 *)immdp->data; 346 for (i = 0; i < wr->num_sge; i++) { 347 if ((plen + wr->sg_list[i].length) > max) 348 return -EMSGSIZE; 349 srcp = (u8 *)(unsigned long)wr->sg_list[i].addr; 350 plen += wr->sg_list[i].length; 351 rem = wr->sg_list[i].length; 352 while (rem) { 353 if (dstp == (u8 *)&sq->queue[sq->size]) 354 dstp = (u8 *)sq->queue; 355 if (rem <= (u8 *)&sq->queue[sq->size] - dstp) 356 len = rem; 357 else 358 len = (u8 *)&sq->queue[sq->size] - dstp; 359 memcpy(dstp, srcp, len); 360 dstp += len; 361 srcp += len; 362 rem -= len; 363 } 364 } 365 len = roundup(plen + sizeof *immdp, 16) - (plen + sizeof *immdp); 366 if (len) 367 memset(dstp, 0, len); 368 immdp->op = FW_RI_DATA_IMMD; 369 immdp->r1 = 0; 370 immdp->r2 = 0; 371 immdp->immdlen = cpu_to_be32(plen); 372 *plenp = plen; 373 return 0; 374 } 375 376 static int build_isgl(__be64 *queue_start, __be64 *queue_end, 377 struct fw_ri_isgl *isglp, struct ib_sge *sg_list, 378 int num_sge, u32 *plenp) 379 380 { 381 int i; 382 u32 plen = 0; 383 __be64 *flitp = (__be64 *)isglp->sge; 384 385 for (i = 0; i < num_sge; i++) { 386 if ((plen + sg_list[i].length) < plen) 387 return -EMSGSIZE; 388 plen += sg_list[i].length; 389 *flitp = cpu_to_be64(((u64)sg_list[i].lkey << 32) | 390 sg_list[i].length); 391 if (++flitp == queue_end) 392 flitp = queue_start; 393 *flitp = cpu_to_be64(sg_list[i].addr); 394 if (++flitp == queue_end) 395 flitp = queue_start; 396 } 397 *flitp = (__force __be64)0; 398 isglp->op = FW_RI_DATA_ISGL; 399 isglp->r1 = 0; 400 isglp->nsge = cpu_to_be16(num_sge); 401 isglp->r2 = 0; 402 if (plenp) 403 *plenp = plen; 404 return 0; 405 } 406 407 static int build_rdma_send(struct t4_sq *sq, union t4_wr *wqe, 408 struct ib_send_wr *wr, u8 *len16) 409 { 410 u32 plen; 411 int size; 412 int ret; 413 414 if (wr->num_sge > T4_MAX_SEND_SGE) 415 return -EINVAL; 416 switch (wr->opcode) { 417 case IB_WR_SEND: 418 if (wr->send_flags & IB_SEND_SOLICITED) 419 wqe->send.sendop_pkd = cpu_to_be32( 420 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_SE)); 421 else 422 wqe->send.sendop_pkd = cpu_to_be32( 423 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND)); 424 wqe->send.stag_inv = 0; 425 break; 426 case IB_WR_SEND_WITH_INV: 427 if (wr->send_flags & IB_SEND_SOLICITED) 428 wqe->send.sendop_pkd = cpu_to_be32( 429 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_SE_INV)); 430 else 431 wqe->send.sendop_pkd = cpu_to_be32( 432 V_FW_RI_SEND_WR_SENDOP(FW_RI_SEND_WITH_INV)); 433 wqe->send.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey); 434 break; 435 436 default: 437 return -EINVAL; 438 } 439 wqe->send.r3 = 0; 440 wqe->send.r4 = 0; 441 442 plen = 0; 443 if (wr->num_sge) { 444 if (wr->send_flags & IB_SEND_INLINE) { 445 ret = build_immd(sq, wqe->send.u.immd_src, wr, 446 T4_MAX_SEND_INLINE, &plen); 447 if (ret) 448 return ret; 449 size = sizeof wqe->send + sizeof(struct fw_ri_immd) + 450 plen; 451 } else { 452 ret = build_isgl((__be64 *)sq->queue, 453 (__be64 *)&sq->queue[sq->size], 454 wqe->send.u.isgl_src, 455 wr->sg_list, wr->num_sge, &plen); 456 if (ret) 457 return ret; 458 size = sizeof wqe->send + sizeof(struct fw_ri_isgl) + 459 wr->num_sge * sizeof(struct fw_ri_sge); 460 } 461 } else { 462 wqe->send.u.immd_src[0].op = FW_RI_DATA_IMMD; 463 wqe->send.u.immd_src[0].r1 = 0; 464 wqe->send.u.immd_src[0].r2 = 0; 465 wqe->send.u.immd_src[0].immdlen = 0; 466 size = sizeof wqe->send + sizeof(struct fw_ri_immd); 467 plen = 0; 468 } 469 *len16 = DIV_ROUND_UP(size, 16); 470 wqe->send.plen = cpu_to_be32(plen); 471 return 0; 472 } 473 474 static int build_rdma_write(struct t4_sq *sq, union t4_wr *wqe, 475 struct ib_send_wr *wr, u8 *len16) 476 { 477 u32 plen; 478 int size; 479 int ret; 480 481 if (wr->num_sge > T4_MAX_SEND_SGE) 482 return -EINVAL; 483 wqe->write.immd_data = 0; 484 wqe->write.stag_sink = cpu_to_be32(rdma_wr(wr)->rkey); 485 wqe->write.to_sink = cpu_to_be64(rdma_wr(wr)->remote_addr); 486 if (wr->num_sge) { 487 if (wr->send_flags & IB_SEND_INLINE) { 488 ret = build_immd(sq, wqe->write.u.immd_src, wr, 489 T4_MAX_WRITE_INLINE, &plen); 490 if (ret) 491 return ret; 492 size = sizeof wqe->write + sizeof(struct fw_ri_immd) + 493 plen; 494 } else { 495 ret = build_isgl((__be64 *)sq->queue, 496 (__be64 *)&sq->queue[sq->size], 497 wqe->write.u.isgl_src, 498 wr->sg_list, wr->num_sge, &plen); 499 if (ret) 500 return ret; 501 size = sizeof wqe->write + sizeof(struct fw_ri_isgl) + 502 wr->num_sge * sizeof(struct fw_ri_sge); 503 } 504 } else { 505 wqe->write.u.immd_src[0].op = FW_RI_DATA_IMMD; 506 wqe->write.u.immd_src[0].r1 = 0; 507 wqe->write.u.immd_src[0].r2 = 0; 508 wqe->write.u.immd_src[0].immdlen = 0; 509 size = sizeof wqe->write + sizeof(struct fw_ri_immd); 510 plen = 0; 511 } 512 *len16 = DIV_ROUND_UP(size, 16); 513 wqe->write.plen = cpu_to_be32(plen); 514 return 0; 515 } 516 517 static int build_rdma_read(union t4_wr *wqe, struct ib_send_wr *wr, u8 *len16) 518 { 519 if (wr->num_sge > 1) 520 return -EINVAL; 521 if (wr->num_sge && wr->sg_list[0].length) { 522 wqe->read.stag_src = cpu_to_be32(rdma_wr(wr)->rkey); 523 wqe->read.to_src_hi = cpu_to_be32((u32)(rdma_wr(wr)->remote_addr 524 >> 32)); 525 wqe->read.to_src_lo = 526 cpu_to_be32((u32)rdma_wr(wr)->remote_addr); 527 wqe->read.stag_sink = cpu_to_be32(wr->sg_list[0].lkey); 528 wqe->read.plen = cpu_to_be32(wr->sg_list[0].length); 529 wqe->read.to_sink_hi = cpu_to_be32((u32)(wr->sg_list[0].addr 530 >> 32)); 531 wqe->read.to_sink_lo = cpu_to_be32((u32)(wr->sg_list[0].addr)); 532 } else { 533 wqe->read.stag_src = cpu_to_be32(2); 534 wqe->read.to_src_hi = 0; 535 wqe->read.to_src_lo = 0; 536 wqe->read.stag_sink = cpu_to_be32(2); 537 wqe->read.plen = 0; 538 wqe->read.to_sink_hi = 0; 539 wqe->read.to_sink_lo = 0; 540 } 541 wqe->read.r2 = 0; 542 wqe->read.r5 = 0; 543 *len16 = DIV_ROUND_UP(sizeof wqe->read, 16); 544 return 0; 545 } 546 547 static int build_rdma_recv(struct c4iw_qp *qhp, union t4_recv_wr *wqe, 548 struct ib_recv_wr *wr, u8 *len16) 549 { 550 int ret; 551 552 ret = build_isgl((__be64 *)qhp->wq.rq.queue, 553 (__be64 *)&qhp->wq.rq.queue[qhp->wq.rq.size], 554 &wqe->recv.isgl, wr->sg_list, wr->num_sge, NULL); 555 if (ret) 556 return ret; 557 *len16 = DIV_ROUND_UP(sizeof wqe->recv + 558 wr->num_sge * sizeof(struct fw_ri_sge), 16); 559 return 0; 560 } 561 562 static int build_inv_stag(union t4_wr *wqe, struct ib_send_wr *wr, 563 u8 *len16) 564 { 565 wqe->inv.stag_inv = cpu_to_be32(wr->ex.invalidate_rkey); 566 wqe->inv.r2 = 0; 567 *len16 = DIV_ROUND_UP(sizeof wqe->inv, 16); 568 return 0; 569 } 570 571 static void free_qp_work(struct work_struct *work) 572 { 573 struct c4iw_ucontext *ucontext; 574 struct c4iw_qp *qhp; 575 struct c4iw_dev *rhp; 576 577 qhp = container_of(work, struct c4iw_qp, free_work); 578 ucontext = qhp->ucontext; 579 rhp = qhp->rhp; 580 581 CTR3(KTR_IW_CXGBE, "%s qhp %p ucontext %p", __func__, 582 qhp, ucontext); 583 destroy_qp(&rhp->rdev, &qhp->wq, 584 ucontext ? &ucontext->uctx : &rhp->rdev.uctx); 585 586 if (ucontext) 587 c4iw_put_ucontext(ucontext); 588 kfree(qhp); 589 } 590 591 static void queue_qp_free(struct kref *kref) 592 { 593 struct c4iw_qp *qhp; 594 595 qhp = container_of(kref, struct c4iw_qp, kref); 596 CTR2(KTR_IW_CXGBE, "%s qhp %p", __func__, qhp); 597 queue_work(qhp->rhp->rdev.free_workq, &qhp->free_work); 598 } 599 600 void c4iw_qp_add_ref(struct ib_qp *qp) 601 { 602 CTR2(KTR_IW_CXGBE, "%s ib_qp %p", __func__, qp); 603 kref_get(&to_c4iw_qp(qp)->kref); 604 } 605 606 void c4iw_qp_rem_ref(struct ib_qp *qp) 607 { 608 CTR2(KTR_IW_CXGBE, "%s ib_qp %p", __func__, qp); 609 kref_put(&to_c4iw_qp(qp)->kref, queue_qp_free); 610 } 611 612 static void complete_sq_drain_wr(struct c4iw_qp *qhp, struct ib_send_wr *wr) 613 { 614 struct t4_cqe cqe = {}; 615 struct c4iw_cq *schp; 616 unsigned long flag; 617 struct t4_cq *cq; 618 619 schp = to_c4iw_cq(qhp->ibqp.send_cq); 620 cq = &schp->cq; 621 622 PDBG("%s drain sq id %u\n", __func__, qhp->wq.sq.qid); 623 cqe.u.drain_cookie = wr->wr_id; 624 cqe.header = cpu_to_be32(V_CQE_STATUS(T4_ERR_SWFLUSH) | 625 V_CQE_OPCODE(C4IW_DRAIN_OPCODE) | 626 V_CQE_TYPE(1) | 627 V_CQE_SWCQE(1) | 628 V_CQE_QPID(qhp->wq.sq.qid)); 629 630 spin_lock_irqsave(&schp->lock, flag); 631 cqe.bits_type_ts = cpu_to_be64(V_CQE_GENBIT((u64)cq->gen)); 632 cq->sw_queue[cq->sw_pidx] = cqe; 633 t4_swcq_produce(cq); 634 spin_unlock_irqrestore(&schp->lock, flag); 635 636 spin_lock_irqsave(&schp->comp_handler_lock, flag); 637 (*schp->ibcq.comp_handler)(&schp->ibcq, 638 schp->ibcq.cq_context); 639 spin_unlock_irqrestore(&schp->comp_handler_lock, flag); 640 } 641 642 static void complete_rq_drain_wr(struct c4iw_qp *qhp, struct ib_recv_wr *wr) 643 { 644 struct t4_cqe cqe = {}; 645 struct c4iw_cq *rchp; 646 unsigned long flag; 647 struct t4_cq *cq; 648 649 rchp = to_c4iw_cq(qhp->ibqp.recv_cq); 650 cq = &rchp->cq; 651 652 PDBG("%s drain rq id %u\n", __func__, qhp->wq.sq.qid); 653 cqe.u.drain_cookie = wr->wr_id; 654 cqe.header = cpu_to_be32(V_CQE_STATUS(T4_ERR_SWFLUSH) | 655 V_CQE_OPCODE(C4IW_DRAIN_OPCODE) | 656 V_CQE_TYPE(0) | 657 V_CQE_SWCQE(1) | 658 V_CQE_QPID(qhp->wq.sq.qid)); 659 660 spin_lock_irqsave(&rchp->lock, flag); 661 cqe.bits_type_ts = cpu_to_be64(V_CQE_GENBIT((u64)cq->gen)); 662 cq->sw_queue[cq->sw_pidx] = cqe; 663 t4_swcq_produce(cq); 664 spin_unlock_irqrestore(&rchp->lock, flag); 665 666 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 667 (*rchp->ibcq.comp_handler)(&rchp->ibcq, 668 rchp->ibcq.cq_context); 669 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 670 } 671 672 static int build_tpte_memreg(struct fw_ri_fr_nsmr_tpte_wr *fr, 673 struct ib_reg_wr *wr, struct c4iw_mr *mhp, u8 *len16) 674 { 675 __be64 *p = (__be64 *)fr->pbl; 676 677 if (wr->mr->page_size > C4IW_MAX_PAGE_SIZE) 678 return -EINVAL; 679 680 fr->r2 = cpu_to_be32(0); 681 fr->stag = cpu_to_be32(mhp->ibmr.rkey); 682 683 fr->tpte.valid_to_pdid = cpu_to_be32(F_FW_RI_TPTE_VALID | 684 V_FW_RI_TPTE_STAGKEY((mhp->ibmr.rkey & M_FW_RI_TPTE_STAGKEY)) | 685 V_FW_RI_TPTE_STAGSTATE(1) | 686 V_FW_RI_TPTE_STAGTYPE(FW_RI_STAG_NSMR) | 687 V_FW_RI_TPTE_PDID(mhp->attr.pdid)); 688 fr->tpte.locread_to_qpid = cpu_to_be32( 689 V_FW_RI_TPTE_PERM(c4iw_ib_to_tpt_access(wr->access)) | 690 V_FW_RI_TPTE_ADDRTYPE(FW_RI_VA_BASED_TO) | 691 V_FW_RI_TPTE_PS(ilog2(wr->mr->page_size) - 12)); 692 fr->tpte.nosnoop_pbladdr = cpu_to_be32(V_FW_RI_TPTE_PBLADDR( 693 PBL_OFF(&mhp->rhp->rdev, mhp->attr.pbl_addr)>>3)); 694 fr->tpte.dca_mwbcnt_pstag = cpu_to_be32(0); 695 fr->tpte.len_hi = cpu_to_be32(mhp->ibmr.length >> 32); 696 fr->tpte.len_lo = cpu_to_be32(mhp->ibmr.length & 0xffffffff); 697 fr->tpte.va_hi = cpu_to_be32(mhp->ibmr.iova >> 32); 698 fr->tpte.va_lo_fbo = cpu_to_be32(mhp->ibmr.iova & 0xffffffff); 699 700 p[0] = cpu_to_be64((u64)mhp->mpl[0]); 701 p[1] = cpu_to_be64((u64)mhp->mpl[1]); 702 703 *len16 = DIV_ROUND_UP(sizeof(*fr), 16); 704 return 0; 705 } 706 707 static int build_memreg(struct t4_sq *sq, union t4_wr *wqe, 708 struct ib_reg_wr *wr, struct c4iw_mr *mhp, u8 *len16, 709 bool dsgl_supported) 710 { 711 struct fw_ri_immd *imdp; 712 __be64 *p; 713 int i; 714 int pbllen = roundup(mhp->mpl_len * sizeof(u64), 32); 715 int rem; 716 717 if (mhp->mpl_len > t4_max_fr_depth(&mhp->rhp->rdev, use_dsgl)) 718 return -EINVAL; 719 if (wr->mr->page_size > C4IW_MAX_PAGE_SIZE) 720 return -EINVAL; 721 722 wqe->fr.qpbinde_to_dcacpu = 0; 723 wqe->fr.pgsz_shift = ilog2(wr->mr->page_size) - 12; 724 wqe->fr.addr_type = FW_RI_VA_BASED_TO; 725 wqe->fr.mem_perms = c4iw_ib_to_tpt_access(wr->access); 726 wqe->fr.len_hi = cpu_to_be32(mhp->ibmr.length >> 32); 727 wqe->fr.len_lo = cpu_to_be32(mhp->ibmr.length & 0xffffffff); 728 wqe->fr.stag = cpu_to_be32(wr->key); 729 wqe->fr.va_hi = cpu_to_be32(mhp->ibmr.iova >> 32); 730 wqe->fr.va_lo_fbo = cpu_to_be32(mhp->ibmr.iova & 0xffffffff); 731 732 if (dsgl_supported && use_dsgl && (pbllen > max_fr_immd)) { 733 struct fw_ri_dsgl *sglp; 734 735 for (i = 0; i < mhp->mpl_len; i++) 736 mhp->mpl[i] = 737 (__force u64)cpu_to_be64((u64)mhp->mpl[i]); 738 739 sglp = (struct fw_ri_dsgl *)(&wqe->fr + 1); 740 sglp->op = FW_RI_DATA_DSGL; 741 sglp->r1 = 0; 742 sglp->nsge = cpu_to_be16(1); 743 sglp->addr0 = cpu_to_be64(mhp->mpl_addr); 744 sglp->len0 = cpu_to_be32(pbllen); 745 746 *len16 = DIV_ROUND_UP(sizeof(wqe->fr) + sizeof(*sglp), 16); 747 } else { 748 imdp = (struct fw_ri_immd *)(&wqe->fr + 1); 749 imdp->op = FW_RI_DATA_IMMD; 750 imdp->r1 = 0; 751 imdp->r2 = 0; 752 imdp->immdlen = cpu_to_be32(pbllen); 753 p = (__be64 *)(imdp + 1); 754 rem = pbllen; 755 for (i = 0; i < mhp->mpl_len; i++) { 756 *p = cpu_to_be64((u64)mhp->mpl[i]); 757 rem -= sizeof(*p); 758 if (++p == (__be64 *)&sq->queue[sq->size]) 759 p = (__be64 *)sq->queue; 760 } 761 BUG_ON(rem < 0); 762 while (rem) { 763 *p = 0; 764 rem -= sizeof(*p); 765 if (++p == (__be64 *)&sq->queue[sq->size]) 766 p = (__be64 *)sq->queue; 767 } 768 *len16 = DIV_ROUND_UP(sizeof(wqe->fr) + sizeof(*imdp) 769 + pbllen, 16); 770 } 771 772 return 0; 773 } 774 775 int c4iw_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, 776 struct ib_send_wr **bad_wr) 777 { 778 int err = 0; 779 u8 len16 = 0; 780 enum fw_wr_opcodes fw_opcode = 0; 781 enum fw_ri_wr_flags fw_flags; 782 struct c4iw_qp *qhp; 783 union t4_wr *wqe = NULL; 784 u32 num_wrs; 785 struct t4_swsqe *swsqe; 786 unsigned long flag; 787 u16 idx = 0; 788 struct c4iw_rdev *rdev; 789 790 qhp = to_c4iw_qp(ibqp); 791 rdev = &qhp->rhp->rdev; 792 spin_lock_irqsave(&qhp->lock, flag); 793 if (t4_wq_in_error(&qhp->wq)) { 794 spin_unlock_irqrestore(&qhp->lock, flag); 795 complete_sq_drain_wr(qhp, wr); 796 return err; 797 } 798 num_wrs = t4_sq_avail(&qhp->wq); 799 if (num_wrs == 0) { 800 spin_unlock_irqrestore(&qhp->lock, flag); 801 *bad_wr = wr; 802 return -ENOMEM; 803 } 804 while (wr) { 805 if (num_wrs == 0) { 806 err = -ENOMEM; 807 *bad_wr = wr; 808 break; 809 } 810 wqe = (union t4_wr *)((u8 *)qhp->wq.sq.queue + 811 qhp->wq.sq.wq_pidx * T4_EQ_ENTRY_SIZE); 812 813 fw_flags = 0; 814 if (wr->send_flags & IB_SEND_SOLICITED) 815 fw_flags |= FW_RI_SOLICITED_EVENT_FLAG; 816 if (wr->send_flags & IB_SEND_SIGNALED || qhp->sq_sig_all) 817 fw_flags |= FW_RI_COMPLETION_FLAG; 818 swsqe = &qhp->wq.sq.sw_sq[qhp->wq.sq.pidx]; 819 switch (wr->opcode) { 820 case IB_WR_SEND_WITH_INV: 821 case IB_WR_SEND: 822 if (wr->send_flags & IB_SEND_FENCE) 823 fw_flags |= FW_RI_READ_FENCE_FLAG; 824 fw_opcode = FW_RI_SEND_WR; 825 if (wr->opcode == IB_WR_SEND) 826 swsqe->opcode = FW_RI_SEND; 827 else 828 swsqe->opcode = FW_RI_SEND_WITH_INV; 829 err = build_rdma_send(&qhp->wq.sq, wqe, wr, &len16); 830 break; 831 case IB_WR_RDMA_WRITE: 832 fw_opcode = FW_RI_RDMA_WRITE_WR; 833 swsqe->opcode = FW_RI_RDMA_WRITE; 834 err = build_rdma_write(&qhp->wq.sq, wqe, wr, &len16); 835 break; 836 case IB_WR_RDMA_READ: 837 case IB_WR_RDMA_READ_WITH_INV: 838 fw_opcode = FW_RI_RDMA_READ_WR; 839 swsqe->opcode = FW_RI_READ_REQ; 840 if (wr->opcode == IB_WR_RDMA_READ_WITH_INV) { 841 c4iw_invalidate_mr(qhp->rhp, 842 wr->sg_list[0].lkey); 843 fw_flags = FW_RI_RDMA_READ_INVALIDATE; 844 } else { 845 fw_flags = 0; 846 } 847 err = build_rdma_read(wqe, wr, &len16); 848 if (err) 849 break; 850 swsqe->read_len = wr->sg_list[0].length; 851 if (!qhp->wq.sq.oldest_read) 852 qhp->wq.sq.oldest_read = swsqe; 853 break; 854 case IB_WR_REG_MR: { 855 struct c4iw_mr *mhp = to_c4iw_mr(reg_wr(wr)->mr); 856 857 swsqe->opcode = FW_RI_FAST_REGISTER; 858 if (rdev->adap->params.fr_nsmr_tpte_wr_support && 859 !mhp->attr.state && mhp->mpl_len <= 2) { 860 fw_opcode = FW_RI_FR_NSMR_TPTE_WR; 861 err = build_tpte_memreg(&wqe->fr_tpte, reg_wr(wr), 862 mhp, &len16); 863 } else { 864 fw_opcode = FW_RI_FR_NSMR_WR; 865 err = build_memreg(&qhp->wq.sq, wqe, reg_wr(wr), 866 mhp, &len16, 867 rdev->adap->params.ulptx_memwrite_dsgl); 868 } 869 if (err) 870 break; 871 mhp->attr.state = 1; 872 break; 873 } 874 case IB_WR_LOCAL_INV: 875 if (wr->send_flags & IB_SEND_FENCE) 876 fw_flags |= FW_RI_LOCAL_FENCE_FLAG; 877 fw_opcode = FW_RI_INV_LSTAG_WR; 878 swsqe->opcode = FW_RI_LOCAL_INV; 879 err = build_inv_stag(wqe, wr, &len16); 880 c4iw_invalidate_mr(qhp->rhp, wr->ex.invalidate_rkey); 881 break; 882 default: 883 CTR2(KTR_IW_CXGBE, "%s post of type =%d TBD!", __func__, 884 wr->opcode); 885 err = -EINVAL; 886 } 887 if (err) { 888 *bad_wr = wr; 889 break; 890 } 891 swsqe->idx = qhp->wq.sq.pidx; 892 swsqe->complete = 0; 893 swsqe->signaled = (wr->send_flags & IB_SEND_SIGNALED) || 894 qhp->sq_sig_all; 895 swsqe->flushed = 0; 896 swsqe->wr_id = wr->wr_id; 897 898 init_wr_hdr(wqe, qhp->wq.sq.pidx, fw_opcode, fw_flags, len16); 899 900 CTR5(KTR_IW_CXGBE, 901 "%s cookie 0x%llx pidx 0x%x opcode 0x%x read_len %u", 902 __func__, (unsigned long long)wr->wr_id, qhp->wq.sq.pidx, 903 swsqe->opcode, swsqe->read_len); 904 wr = wr->next; 905 num_wrs--; 906 t4_sq_produce(&qhp->wq, len16); 907 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); 908 } 909 910 t4_ring_sq_db(&qhp->wq, idx, wqe, rdev->adap->iwt.wc_en); 911 spin_unlock_irqrestore(&qhp->lock, flag); 912 return err; 913 } 914 915 int c4iw_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr, 916 struct ib_recv_wr **bad_wr) 917 { 918 int err = 0; 919 struct c4iw_qp *qhp; 920 union t4_recv_wr *wqe = NULL; 921 u32 num_wrs; 922 u8 len16 = 0; 923 unsigned long flag; 924 u16 idx = 0; 925 926 qhp = to_c4iw_qp(ibqp); 927 spin_lock_irqsave(&qhp->lock, flag); 928 if (t4_wq_in_error(&qhp->wq)) { 929 spin_unlock_irqrestore(&qhp->lock, flag); 930 complete_rq_drain_wr(qhp, wr); 931 return err; 932 } 933 num_wrs = t4_rq_avail(&qhp->wq); 934 if (num_wrs == 0) { 935 spin_unlock_irqrestore(&qhp->lock, flag); 936 *bad_wr = wr; 937 return -ENOMEM; 938 } 939 while (wr) { 940 if (wr->num_sge > T4_MAX_RECV_SGE) { 941 err = -EINVAL; 942 *bad_wr = wr; 943 break; 944 } 945 wqe = (union t4_recv_wr *)((u8 *)qhp->wq.rq.queue + 946 qhp->wq.rq.wq_pidx * 947 T4_EQ_ENTRY_SIZE); 948 if (num_wrs) 949 err = build_rdma_recv(qhp, wqe, wr, &len16); 950 else 951 err = -ENOMEM; 952 if (err) { 953 *bad_wr = wr; 954 break; 955 } 956 957 qhp->wq.rq.sw_rq[qhp->wq.rq.pidx].wr_id = wr->wr_id; 958 959 wqe->recv.opcode = FW_RI_RECV_WR; 960 wqe->recv.r1 = 0; 961 wqe->recv.wrid = qhp->wq.rq.pidx; 962 wqe->recv.r2[0] = 0; 963 wqe->recv.r2[1] = 0; 964 wqe->recv.r2[2] = 0; 965 wqe->recv.len16 = len16; 966 CTR3(KTR_IW_CXGBE, "%s cookie 0x%llx pidx %u", __func__, 967 (unsigned long long) wr->wr_id, qhp->wq.rq.pidx); 968 t4_rq_produce(&qhp->wq, len16); 969 idx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); 970 wr = wr->next; 971 num_wrs--; 972 } 973 974 t4_ring_rq_db(&qhp->wq, idx, wqe, qhp->rhp->rdev.adap->iwt.wc_en); 975 spin_unlock_irqrestore(&qhp->lock, flag); 976 return err; 977 } 978 979 static inline void build_term_codes(struct t4_cqe *err_cqe, u8 *layer_type, 980 u8 *ecode) 981 { 982 int status; 983 int tagged; 984 int opcode; 985 int rqtype; 986 int send_inv; 987 988 if (!err_cqe) { 989 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA; 990 *ecode = 0; 991 return; 992 } 993 994 status = CQE_STATUS(err_cqe); 995 opcode = CQE_OPCODE(err_cqe); 996 rqtype = RQ_TYPE(err_cqe); 997 send_inv = (opcode == FW_RI_SEND_WITH_INV) || 998 (opcode == FW_RI_SEND_WITH_SE_INV); 999 tagged = (opcode == FW_RI_RDMA_WRITE) || 1000 (rqtype && (opcode == FW_RI_READ_RESP)); 1001 1002 switch (status) { 1003 case T4_ERR_STAG: 1004 if (send_inv) { 1005 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 1006 *ecode = RDMAP_CANT_INV_STAG; 1007 } else { 1008 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1009 *ecode = RDMAP_INV_STAG; 1010 } 1011 break; 1012 case T4_ERR_PDID: 1013 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1014 if ((opcode == FW_RI_SEND_WITH_INV) || 1015 (opcode == FW_RI_SEND_WITH_SE_INV)) 1016 *ecode = RDMAP_CANT_INV_STAG; 1017 else 1018 *ecode = RDMAP_STAG_NOT_ASSOC; 1019 break; 1020 case T4_ERR_QPID: 1021 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1022 *ecode = RDMAP_STAG_NOT_ASSOC; 1023 break; 1024 case T4_ERR_ACCESS: 1025 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1026 *ecode = RDMAP_ACC_VIOL; 1027 break; 1028 case T4_ERR_WRAP: 1029 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1030 *ecode = RDMAP_TO_WRAP; 1031 break; 1032 case T4_ERR_BOUND: 1033 if (tagged) { 1034 *layer_type = LAYER_DDP|DDP_TAGGED_ERR; 1035 *ecode = DDPT_BASE_BOUNDS; 1036 } else { 1037 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT; 1038 *ecode = RDMAP_BASE_BOUNDS; 1039 } 1040 break; 1041 case T4_ERR_INVALIDATE_SHARED_MR: 1042 case T4_ERR_INVALIDATE_MR_WITH_MW_BOUND: 1043 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 1044 *ecode = RDMAP_CANT_INV_STAG; 1045 break; 1046 case T4_ERR_ECC: 1047 case T4_ERR_ECC_PSTAG: 1048 case T4_ERR_INTERNAL_ERR: 1049 *layer_type = LAYER_RDMAP|RDMAP_LOCAL_CATA; 1050 *ecode = 0; 1051 break; 1052 case T4_ERR_OUT_OF_RQE: 1053 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1054 *ecode = DDPU_INV_MSN_NOBUF; 1055 break; 1056 case T4_ERR_PBL_ADDR_BOUND: 1057 *layer_type = LAYER_DDP|DDP_TAGGED_ERR; 1058 *ecode = DDPT_BASE_BOUNDS; 1059 break; 1060 case T4_ERR_CRC: 1061 *layer_type = LAYER_MPA|DDP_LLP; 1062 *ecode = MPA_CRC_ERR; 1063 break; 1064 case T4_ERR_MARKER: 1065 *layer_type = LAYER_MPA|DDP_LLP; 1066 *ecode = MPA_MARKER_ERR; 1067 break; 1068 case T4_ERR_PDU_LEN_ERR: 1069 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1070 *ecode = DDPU_MSG_TOOBIG; 1071 break; 1072 case T4_ERR_DDP_VERSION: 1073 if (tagged) { 1074 *layer_type = LAYER_DDP|DDP_TAGGED_ERR; 1075 *ecode = DDPT_INV_VERS; 1076 } else { 1077 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1078 *ecode = DDPU_INV_VERS; 1079 } 1080 break; 1081 case T4_ERR_RDMA_VERSION: 1082 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 1083 *ecode = RDMAP_INV_VERS; 1084 break; 1085 case T4_ERR_OPCODE: 1086 *layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP; 1087 *ecode = RDMAP_INV_OPCODE; 1088 break; 1089 case T4_ERR_DDP_QUEUE_NUM: 1090 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1091 *ecode = DDPU_INV_QN; 1092 break; 1093 case T4_ERR_MSN: 1094 case T4_ERR_MSN_GAP: 1095 case T4_ERR_MSN_RANGE: 1096 case T4_ERR_IRD_OVERFLOW: 1097 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1098 *ecode = DDPU_INV_MSN_RANGE; 1099 break; 1100 case T4_ERR_TBIT: 1101 *layer_type = LAYER_DDP|DDP_LOCAL_CATA; 1102 *ecode = 0; 1103 break; 1104 case T4_ERR_MO: 1105 *layer_type = LAYER_DDP|DDP_UNTAGGED_ERR; 1106 *ecode = DDPU_INV_MO; 1107 break; 1108 default: 1109 *layer_type = LAYER_RDMAP|DDP_LOCAL_CATA; 1110 *ecode = 0; 1111 break; 1112 } 1113 } 1114 1115 static void post_terminate(struct c4iw_qp *qhp, struct t4_cqe *err_cqe, 1116 gfp_t gfp) 1117 { 1118 int ret; 1119 struct fw_ri_wr *wqe; 1120 struct terminate_message *term; 1121 struct wrqe *wr; 1122 struct socket *so = qhp->ep->com.so; 1123 struct inpcb *inp = sotoinpcb(so); 1124 struct tcpcb *tp = intotcpcb(inp); 1125 struct toepcb *toep = tp->t_toe; 1126 1127 CTR4(KTR_IW_CXGBE, "%s qhp %p qid 0x%x tid %u", __func__, qhp, 1128 qhp->wq.sq.qid, qhp->ep->hwtid); 1129 1130 wr = alloc_wrqe(sizeof(*wqe), &toep->ofld_txq->wrq); 1131 if (wr == NULL) 1132 return; 1133 wqe = wrtod(wr); 1134 1135 memset(wqe, 0, sizeof *wqe); 1136 wqe->op_compl = cpu_to_be32(V_FW_WR_OP(FW_RI_WR)); 1137 wqe->flowid_len16 = cpu_to_be32( 1138 V_FW_WR_FLOWID(qhp->ep->hwtid) | 1139 V_FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16))); 1140 1141 wqe->u.terminate.type = FW_RI_TYPE_TERMINATE; 1142 wqe->u.terminate.immdlen = cpu_to_be32(sizeof *term); 1143 term = (struct terminate_message *)wqe->u.terminate.termmsg; 1144 if (qhp->attr.layer_etype == (LAYER_MPA|DDP_LLP)) { 1145 term->layer_etype = qhp->attr.layer_etype; 1146 term->ecode = qhp->attr.ecode; 1147 } else 1148 build_term_codes(err_cqe, &term->layer_etype, &term->ecode); 1149 ret = creds(toep, inp, sizeof(*wqe)); 1150 if (ret) { 1151 free_wrqe(wr); 1152 return; 1153 } 1154 t4_wrq_tx(qhp->rhp->rdev.adap, wr); 1155 } 1156 1157 /* Assumes qhp lock is held. */ 1158 static void __flush_qp(struct c4iw_qp *qhp, struct c4iw_cq *rchp, 1159 struct c4iw_cq *schp) 1160 { 1161 int count; 1162 int rq_flushed, sq_flushed; 1163 unsigned long flag; 1164 1165 CTR4(KTR_IW_CXGBE, "%s qhp %p rchp %p schp %p", __func__, qhp, rchp, 1166 schp); 1167 1168 /* locking hierarchy: cq lock first, then qp lock. */ 1169 spin_lock_irqsave(&rchp->lock, flag); 1170 spin_lock(&qhp->lock); 1171 1172 if (qhp->wq.flushed) { 1173 spin_unlock(&qhp->lock); 1174 spin_unlock_irqrestore(&rchp->lock, flag); 1175 return; 1176 } 1177 qhp->wq.flushed = 1; 1178 1179 c4iw_flush_hw_cq(rchp); 1180 c4iw_count_rcqes(&rchp->cq, &qhp->wq, &count); 1181 rq_flushed = c4iw_flush_rq(&qhp->wq, &rchp->cq, count); 1182 spin_unlock(&qhp->lock); 1183 spin_unlock_irqrestore(&rchp->lock, flag); 1184 1185 /* locking hierarchy: cq lock first, then qp lock. */ 1186 spin_lock_irqsave(&schp->lock, flag); 1187 spin_lock(&qhp->lock); 1188 if (schp != rchp) 1189 c4iw_flush_hw_cq(schp); 1190 sq_flushed = c4iw_flush_sq(qhp); 1191 spin_unlock(&qhp->lock); 1192 spin_unlock_irqrestore(&schp->lock, flag); 1193 1194 if (schp == rchp) { 1195 if (t4_clear_cq_armed(&rchp->cq) && 1196 (rq_flushed || sq_flushed)) { 1197 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 1198 (*rchp->ibcq.comp_handler)(&rchp->ibcq, 1199 rchp->ibcq.cq_context); 1200 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 1201 } 1202 } else { 1203 if (t4_clear_cq_armed(&rchp->cq) && rq_flushed) { 1204 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 1205 (*rchp->ibcq.comp_handler)(&rchp->ibcq, 1206 rchp->ibcq.cq_context); 1207 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 1208 } 1209 if (t4_clear_cq_armed(&schp->cq) && sq_flushed) { 1210 spin_lock_irqsave(&schp->comp_handler_lock, flag); 1211 (*schp->ibcq.comp_handler)(&schp->ibcq, 1212 schp->ibcq.cq_context); 1213 spin_unlock_irqrestore(&schp->comp_handler_lock, flag); 1214 } 1215 } 1216 } 1217 1218 static void flush_qp(struct c4iw_qp *qhp) 1219 { 1220 struct c4iw_cq *rchp, *schp; 1221 unsigned long flag; 1222 1223 rchp = to_c4iw_cq(qhp->ibqp.recv_cq); 1224 schp = to_c4iw_cq(qhp->ibqp.send_cq); 1225 1226 t4_set_wq_in_error(&qhp->wq); 1227 if (qhp->ibqp.uobject) { 1228 t4_set_cq_in_error(&rchp->cq); 1229 spin_lock_irqsave(&rchp->comp_handler_lock, flag); 1230 (*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context); 1231 spin_unlock_irqrestore(&rchp->comp_handler_lock, flag); 1232 if (schp != rchp) { 1233 t4_set_cq_in_error(&schp->cq); 1234 spin_lock_irqsave(&schp->comp_handler_lock, flag); 1235 (*schp->ibcq.comp_handler)(&schp->ibcq, 1236 schp->ibcq.cq_context); 1237 spin_unlock_irqrestore(&schp->comp_handler_lock, flag); 1238 } 1239 return; 1240 } 1241 __flush_qp(qhp, rchp, schp); 1242 } 1243 1244 static int 1245 rdma_fini(struct c4iw_dev *rhp, struct c4iw_qp *qhp, struct c4iw_ep *ep) 1246 { 1247 struct c4iw_rdev *rdev = &rhp->rdev; 1248 struct adapter *sc = rdev->adap; 1249 struct fw_ri_wr *wqe; 1250 int ret; 1251 struct wrqe *wr; 1252 struct socket *so = ep->com.so; 1253 struct inpcb *inp = sotoinpcb(so); 1254 struct tcpcb *tp = intotcpcb(inp); 1255 struct toepcb *toep = tp->t_toe; 1256 1257 KASSERT(rhp == qhp->rhp && ep == qhp->ep, ("%s: EDOOFUS", __func__)); 1258 1259 CTR5(KTR_IW_CXGBE, "%s qhp %p qid 0x%x ep %p tid %u", __func__, qhp, 1260 qhp->wq.sq.qid, ep, ep->hwtid); 1261 1262 wr = alloc_wrqe(sizeof(*wqe), &toep->ofld_txq->wrq); 1263 if (wr == NULL) 1264 return (0); 1265 wqe = wrtod(wr); 1266 1267 memset(wqe, 0, sizeof *wqe); 1268 1269 wqe->op_compl = cpu_to_be32(V_FW_WR_OP(FW_RI_WR) | F_FW_WR_COMPL); 1270 wqe->flowid_len16 = cpu_to_be32(V_FW_WR_FLOWID(ep->hwtid) | 1271 V_FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16))); 1272 wqe->cookie = (unsigned long) &ep->com.wr_wait; 1273 wqe->u.fini.type = FW_RI_TYPE_FINI; 1274 1275 c4iw_init_wr_wait(&ep->com.wr_wait); 1276 1277 ret = creds(toep, inp, sizeof(*wqe)); 1278 if (ret) { 1279 free_wrqe(wr); 1280 return ret; 1281 } 1282 t4_wrq_tx(sc, wr); 1283 1284 ret = c4iw_wait_for_reply(rdev, &ep->com.wr_wait, ep->hwtid, 1285 qhp->wq.sq.qid, ep->com.so, __func__); 1286 return ret; 1287 } 1288 1289 static void build_rtr_msg(u8 p2p_type, struct fw_ri_init *init) 1290 { 1291 CTR2(KTR_IW_CXGBE, "%s p2p_type = %d", __func__, p2p_type); 1292 memset(&init->u, 0, sizeof init->u); 1293 switch (p2p_type) { 1294 case FW_RI_INIT_P2PTYPE_RDMA_WRITE: 1295 init->u.write.opcode = FW_RI_RDMA_WRITE_WR; 1296 init->u.write.stag_sink = cpu_to_be32(1); 1297 init->u.write.to_sink = cpu_to_be64(1); 1298 init->u.write.u.immd_src[0].op = FW_RI_DATA_IMMD; 1299 init->u.write.len16 = DIV_ROUND_UP(sizeof init->u.write + 1300 sizeof(struct fw_ri_immd), 1301 16); 1302 break; 1303 case FW_RI_INIT_P2PTYPE_READ_REQ: 1304 init->u.write.opcode = FW_RI_RDMA_READ_WR; 1305 init->u.read.stag_src = cpu_to_be32(1); 1306 init->u.read.to_src_lo = cpu_to_be32(1); 1307 init->u.read.stag_sink = cpu_to_be32(1); 1308 init->u.read.to_sink_lo = cpu_to_be32(1); 1309 init->u.read.len16 = DIV_ROUND_UP(sizeof init->u.read, 16); 1310 break; 1311 } 1312 } 1313 1314 static int 1315 creds(struct toepcb *toep, struct inpcb *inp, size_t wrsize) 1316 { 1317 struct ofld_tx_sdesc *txsd; 1318 1319 CTR3(KTR_IW_CXGBE, "%s:creB %p %u", __func__, toep , wrsize); 1320 INP_WLOCK(inp); 1321 if ((inp->inp_flags & (INP_DROPPED | INP_TIMEWAIT)) != 0) { 1322 INP_WUNLOCK(inp); 1323 return (EINVAL); 1324 } 1325 txsd = &toep->txsd[toep->txsd_pidx]; 1326 txsd->tx_credits = howmany(wrsize, 16); 1327 txsd->plen = 0; 1328 KASSERT(toep->tx_credits >= txsd->tx_credits && toep->txsd_avail > 0, 1329 ("%s: not enough credits (%d)", __func__, toep->tx_credits)); 1330 toep->tx_credits -= txsd->tx_credits; 1331 if (__predict_false(++toep->txsd_pidx == toep->txsd_total)) 1332 toep->txsd_pidx = 0; 1333 toep->txsd_avail--; 1334 INP_WUNLOCK(inp); 1335 CTR5(KTR_IW_CXGBE, "%s:creE %p %u %u %u", __func__, toep , 1336 txsd->tx_credits, toep->tx_credits, toep->txsd_pidx); 1337 return (0); 1338 } 1339 1340 static int rdma_init(struct c4iw_dev *rhp, struct c4iw_qp *qhp) 1341 { 1342 struct fw_ri_wr *wqe; 1343 int ret; 1344 struct wrqe *wr; 1345 struct c4iw_ep *ep = qhp->ep; 1346 struct c4iw_rdev *rdev = &qhp->rhp->rdev; 1347 struct adapter *sc = rdev->adap; 1348 struct socket *so = ep->com.so; 1349 struct inpcb *inp = sotoinpcb(so); 1350 struct tcpcb *tp = intotcpcb(inp); 1351 struct toepcb *toep = tp->t_toe; 1352 1353 CTR5(KTR_IW_CXGBE, "%s qhp %p qid 0x%x ep %p tid %u", __func__, qhp, 1354 qhp->wq.sq.qid, ep, ep->hwtid); 1355 1356 wr = alloc_wrqe(sizeof(*wqe), &toep->ofld_txq->wrq); 1357 if (wr == NULL) 1358 return (0); 1359 wqe = wrtod(wr); 1360 ret = alloc_ird(rhp, qhp->attr.max_ird); 1361 if (ret) { 1362 qhp->attr.max_ird = 0; 1363 free_wrqe(wr); 1364 return ret; 1365 } 1366 1367 memset(wqe, 0, sizeof *wqe); 1368 1369 wqe->op_compl = cpu_to_be32( 1370 V_FW_WR_OP(FW_RI_WR) | 1371 F_FW_WR_COMPL); 1372 wqe->flowid_len16 = cpu_to_be32(V_FW_WR_FLOWID(ep->hwtid) | 1373 V_FW_WR_LEN16(DIV_ROUND_UP(sizeof *wqe, 16))); 1374 1375 wqe->cookie = (unsigned long) &ep->com.wr_wait; 1376 1377 wqe->u.init.type = FW_RI_TYPE_INIT; 1378 wqe->u.init.mpareqbit_p2ptype = 1379 V_FW_RI_WR_MPAREQBIT(qhp->attr.mpa_attr.initiator) | 1380 V_FW_RI_WR_P2PTYPE(qhp->attr.mpa_attr.p2p_type); 1381 wqe->u.init.mpa_attrs = FW_RI_MPA_IETF_ENABLE; 1382 if (qhp->attr.mpa_attr.recv_marker_enabled) 1383 wqe->u.init.mpa_attrs |= FW_RI_MPA_RX_MARKER_ENABLE; 1384 if (qhp->attr.mpa_attr.xmit_marker_enabled) 1385 wqe->u.init.mpa_attrs |= FW_RI_MPA_TX_MARKER_ENABLE; 1386 if (qhp->attr.mpa_attr.crc_enabled) 1387 wqe->u.init.mpa_attrs |= FW_RI_MPA_CRC_ENABLE; 1388 1389 wqe->u.init.qp_caps = FW_RI_QP_RDMA_READ_ENABLE | 1390 FW_RI_QP_RDMA_WRITE_ENABLE | 1391 FW_RI_QP_BIND_ENABLE; 1392 if (!qhp->ibqp.uobject) 1393 wqe->u.init.qp_caps |= FW_RI_QP_FAST_REGISTER_ENABLE | 1394 FW_RI_QP_STAG0_ENABLE; 1395 wqe->u.init.nrqe = cpu_to_be16(t4_rqes_posted(&qhp->wq)); 1396 wqe->u.init.pdid = cpu_to_be32(qhp->attr.pd); 1397 wqe->u.init.qpid = cpu_to_be32(qhp->wq.sq.qid); 1398 wqe->u.init.sq_eqid = cpu_to_be32(qhp->wq.sq.qid); 1399 wqe->u.init.rq_eqid = cpu_to_be32(qhp->wq.rq.qid); 1400 wqe->u.init.scqid = cpu_to_be32(qhp->attr.scq); 1401 wqe->u.init.rcqid = cpu_to_be32(qhp->attr.rcq); 1402 wqe->u.init.ord_max = cpu_to_be32(qhp->attr.max_ord); 1403 wqe->u.init.ird_max = cpu_to_be32(qhp->attr.max_ird); 1404 wqe->u.init.iss = cpu_to_be32(ep->snd_seq); 1405 wqe->u.init.irs = cpu_to_be32(ep->rcv_seq); 1406 wqe->u.init.hwrqsize = cpu_to_be32(qhp->wq.rq.rqt_size); 1407 wqe->u.init.hwrqaddr = cpu_to_be32(qhp->wq.rq.rqt_hwaddr - 1408 sc->vres.rq.start); 1409 if (qhp->attr.mpa_attr.initiator) 1410 build_rtr_msg(qhp->attr.mpa_attr.p2p_type, &wqe->u.init); 1411 1412 c4iw_init_wr_wait(&ep->com.wr_wait); 1413 1414 ret = creds(toep, inp, sizeof(*wqe)); 1415 if (ret) { 1416 free_wrqe(wr); 1417 free_ird(rhp, qhp->attr.max_ird); 1418 return ret; 1419 } 1420 t4_wrq_tx(sc, wr); 1421 1422 ret = c4iw_wait_for_reply(rdev, &ep->com.wr_wait, ep->hwtid, 1423 qhp->wq.sq.qid, ep->com.so, __func__); 1424 1425 toep->params.ulp_mode = ULP_MODE_RDMA; 1426 free_ird(rhp, qhp->attr.max_ird); 1427 1428 return ret; 1429 } 1430 1431 int c4iw_modify_qp(struct c4iw_dev *rhp, struct c4iw_qp *qhp, 1432 enum c4iw_qp_attr_mask mask, 1433 struct c4iw_qp_attributes *attrs, 1434 int internal) 1435 { 1436 int ret = 0; 1437 struct c4iw_qp_attributes newattr = qhp->attr; 1438 int disconnect = 0; 1439 int terminate = 0; 1440 int abort = 0; 1441 int free = 0; 1442 struct c4iw_ep *ep = NULL; 1443 1444 CTR5(KTR_IW_CXGBE, "%s qhp %p sqid 0x%x rqid 0x%x ep %p", __func__, qhp, 1445 qhp->wq.sq.qid, qhp->wq.rq.qid, qhp->ep); 1446 CTR3(KTR_IW_CXGBE, "%s state %d -> %d", __func__, qhp->attr.state, 1447 (mask & C4IW_QP_ATTR_NEXT_STATE) ? attrs->next_state : -1); 1448 1449 mutex_lock(&qhp->mutex); 1450 1451 /* Process attr changes if in IDLE */ 1452 if (mask & C4IW_QP_ATTR_VALID_MODIFY) { 1453 if (qhp->attr.state != C4IW_QP_STATE_IDLE) { 1454 ret = -EIO; 1455 goto out; 1456 } 1457 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_READ) 1458 newattr.enable_rdma_read = attrs->enable_rdma_read; 1459 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_WRITE) 1460 newattr.enable_rdma_write = attrs->enable_rdma_write; 1461 if (mask & C4IW_QP_ATTR_ENABLE_RDMA_BIND) 1462 newattr.enable_bind = attrs->enable_bind; 1463 if (mask & C4IW_QP_ATTR_MAX_ORD) { 1464 if (attrs->max_ord > c4iw_max_read_depth) { 1465 ret = -EINVAL; 1466 goto out; 1467 } 1468 newattr.max_ord = attrs->max_ord; 1469 } 1470 if (mask & C4IW_QP_ATTR_MAX_IRD) { 1471 if (attrs->max_ird > cur_max_read_depth(rhp)) { 1472 ret = -EINVAL; 1473 goto out; 1474 } 1475 newattr.max_ird = attrs->max_ird; 1476 } 1477 qhp->attr = newattr; 1478 } 1479 1480 if (!(mask & C4IW_QP_ATTR_NEXT_STATE)) 1481 goto out; 1482 if (qhp->attr.state == attrs->next_state) 1483 goto out; 1484 1485 /* Return EINPROGRESS if QP is already in transition state. 1486 * Eg: CLOSING->IDLE transition or *->ERROR transition. 1487 * This can happen while connection is switching(due to rdma_fini) 1488 * from iWARP/RDDP to TOE mode and any inflight RDMA RX data will 1489 * reach TOE driver -> TCP stack -> iWARP driver. In this way 1490 * iWARP driver keep receiving inflight RDMA RX data until socket 1491 * is closed or aborted. And if iWARP CM is in FPDU sate, then 1492 * it tries to put QP in TERM state and disconnects endpoint. 1493 * But as QP is already in transition state, this event is ignored. 1494 */ 1495 if ((qhp->attr.state >= C4IW_QP_STATE_ERROR) && 1496 (attrs->next_state == C4IW_QP_STATE_TERMINATE)) { 1497 ret = -EINPROGRESS; 1498 goto out; 1499 } 1500 1501 switch (qhp->attr.state) { 1502 case C4IW_QP_STATE_IDLE: 1503 switch (attrs->next_state) { 1504 case C4IW_QP_STATE_RTS: 1505 if (!(mask & C4IW_QP_ATTR_LLP_STREAM_HANDLE)) { 1506 ret = -EINVAL; 1507 goto out; 1508 } 1509 if (!(mask & C4IW_QP_ATTR_MPA_ATTR)) { 1510 ret = -EINVAL; 1511 goto out; 1512 } 1513 qhp->attr.mpa_attr = attrs->mpa_attr; 1514 qhp->attr.llp_stream_handle = attrs->llp_stream_handle; 1515 qhp->ep = qhp->attr.llp_stream_handle; 1516 set_state(qhp, C4IW_QP_STATE_RTS); 1517 1518 /* 1519 * Ref the endpoint here and deref when we 1520 * disassociate the endpoint from the QP. This 1521 * happens in CLOSING->IDLE transition or *->ERROR 1522 * transition. 1523 */ 1524 c4iw_get_ep(&qhp->ep->com); 1525 ret = rdma_init(rhp, qhp); 1526 if (ret) 1527 goto err; 1528 break; 1529 case C4IW_QP_STATE_ERROR: 1530 set_state(qhp, C4IW_QP_STATE_ERROR); 1531 flush_qp(qhp); 1532 break; 1533 default: 1534 ret = -EINVAL; 1535 goto out; 1536 } 1537 break; 1538 case C4IW_QP_STATE_RTS: 1539 switch (attrs->next_state) { 1540 case C4IW_QP_STATE_CLOSING: 1541 BUG_ON(atomic_read(&qhp->ep->com.kref.refcount) < 2); 1542 t4_set_wq_in_error(&qhp->wq); 1543 set_state(qhp, C4IW_QP_STATE_CLOSING); 1544 ep = qhp->ep; 1545 if (!internal) { 1546 abort = 0; 1547 disconnect = 1; 1548 c4iw_get_ep(&qhp->ep->com); 1549 } 1550 ret = rdma_fini(rhp, qhp, ep); 1551 if (ret) 1552 goto err; 1553 break; 1554 case C4IW_QP_STATE_TERMINATE: 1555 t4_set_wq_in_error(&qhp->wq); 1556 set_state(qhp, C4IW_QP_STATE_TERMINATE); 1557 qhp->attr.layer_etype = attrs->layer_etype; 1558 qhp->attr.ecode = attrs->ecode; 1559 ep = qhp->ep; 1560 if (!internal) { 1561 c4iw_get_ep(&qhp->ep->com); 1562 terminate = 1; 1563 disconnect = 1; 1564 } else { 1565 terminate = qhp->attr.send_term; 1566 ret = rdma_fini(rhp, qhp, ep); 1567 if (ret) 1568 goto err; 1569 } 1570 break; 1571 case C4IW_QP_STATE_ERROR: 1572 t4_set_wq_in_error(&qhp->wq); 1573 set_state(qhp, C4IW_QP_STATE_ERROR); 1574 if (!internal) { 1575 abort = 1; 1576 disconnect = 1; 1577 ep = qhp->ep; 1578 c4iw_get_ep(&qhp->ep->com); 1579 } 1580 goto err; 1581 break; 1582 default: 1583 ret = -EINVAL; 1584 goto out; 1585 } 1586 break; 1587 case C4IW_QP_STATE_CLOSING: 1588 1589 /* 1590 * Allow kernel users to move to ERROR for qp draining. 1591 */ 1592 if (!internal && (qhp->ibqp.uobject || attrs->next_state != 1593 C4IW_QP_STATE_ERROR)) { 1594 ret = -EINVAL; 1595 goto out; 1596 } 1597 switch (attrs->next_state) { 1598 case C4IW_QP_STATE_IDLE: 1599 flush_qp(qhp); 1600 set_state(qhp, C4IW_QP_STATE_IDLE); 1601 qhp->attr.llp_stream_handle = NULL; 1602 c4iw_put_ep(&qhp->ep->com); 1603 qhp->ep = NULL; 1604 wake_up(&qhp->wait); 1605 break; 1606 case C4IW_QP_STATE_ERROR: 1607 goto err; 1608 default: 1609 ret = -EINVAL; 1610 goto err; 1611 } 1612 break; 1613 case C4IW_QP_STATE_ERROR: 1614 if (attrs->next_state != C4IW_QP_STATE_IDLE) { 1615 ret = -EINVAL; 1616 goto out; 1617 } 1618 if (!t4_sq_empty(&qhp->wq) || !t4_rq_empty(&qhp->wq)) { 1619 ret = -EINVAL; 1620 goto out; 1621 } 1622 set_state(qhp, C4IW_QP_STATE_IDLE); 1623 break; 1624 case C4IW_QP_STATE_TERMINATE: 1625 if (!internal) { 1626 ret = -EINVAL; 1627 goto out; 1628 } 1629 goto err; 1630 break; 1631 default: 1632 printf("%s in a bad state %d\n", 1633 __func__, qhp->attr.state); 1634 ret = -EINVAL; 1635 goto err; 1636 break; 1637 } 1638 goto out; 1639 err: 1640 CTR3(KTR_IW_CXGBE, "%s disassociating ep %p qpid 0x%x", __func__, 1641 qhp->ep, qhp->wq.sq.qid); 1642 1643 /* disassociate the LLP connection */ 1644 qhp->attr.llp_stream_handle = NULL; 1645 if (!ep) 1646 ep = qhp->ep; 1647 qhp->ep = NULL; 1648 set_state(qhp, C4IW_QP_STATE_ERROR); 1649 free = 1; 1650 abort = 1; 1651 BUG_ON(!ep); 1652 flush_qp(qhp); 1653 wake_up(&qhp->wait); 1654 out: 1655 mutex_unlock(&qhp->mutex); 1656 1657 if (terminate) 1658 post_terminate(qhp, NULL, internal ? GFP_ATOMIC : GFP_KERNEL); 1659 1660 /* 1661 * If disconnect is 1, then we need to initiate a disconnect 1662 * on the EP. This can be a normal close (RTS->CLOSING) or 1663 * an abnormal close (RTS/CLOSING->ERROR). 1664 */ 1665 if (disconnect) { 1666 __c4iw_ep_disconnect(ep, abort, internal ? GFP_ATOMIC : 1667 GFP_KERNEL); 1668 c4iw_put_ep(&ep->com); 1669 } 1670 1671 /* 1672 * If free is 1, then we've disassociated the EP from the QP 1673 * and we need to dereference the EP. 1674 */ 1675 if (free) 1676 c4iw_put_ep(&ep->com); 1677 CTR2(KTR_IW_CXGBE, "%s exit state %d", __func__, qhp->attr.state); 1678 return ret; 1679 } 1680 1681 int c4iw_destroy_qp(struct ib_qp *ib_qp) 1682 { 1683 struct c4iw_dev *rhp; 1684 struct c4iw_qp *qhp; 1685 struct c4iw_qp_attributes attrs; 1686 1687 CTR2(KTR_IW_CXGBE, "%s ib_qp %p", __func__, ib_qp); 1688 qhp = to_c4iw_qp(ib_qp); 1689 rhp = qhp->rhp; 1690 1691 attrs.next_state = C4IW_QP_STATE_ERROR; 1692 if (qhp->attr.state == C4IW_QP_STATE_TERMINATE) 1693 c4iw_modify_qp(rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 1694 else 1695 c4iw_modify_qp(rhp, qhp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 0); 1696 wait_event(qhp->wait, !qhp->ep); 1697 1698 remove_handle(rhp, &rhp->qpidr, qhp->wq.sq.qid); 1699 1700 free_ird(rhp, qhp->attr.max_ird); 1701 c4iw_qp_rem_ref(ib_qp); 1702 1703 CTR3(KTR_IW_CXGBE, "%s ib_qp %p qpid 0x%0x", __func__, ib_qp, 1704 qhp->wq.sq.qid); 1705 return 0; 1706 } 1707 1708 struct ib_qp * 1709 c4iw_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *attrs, 1710 struct ib_udata *udata) 1711 { 1712 struct c4iw_dev *rhp; 1713 struct c4iw_qp *qhp; 1714 struct c4iw_pd *php; 1715 struct c4iw_cq *schp; 1716 struct c4iw_cq *rchp; 1717 struct c4iw_create_qp_resp uresp; 1718 unsigned int sqsize, rqsize; 1719 struct c4iw_ucontext *ucontext; 1720 int ret; 1721 struct c4iw_mm_entry *sq_key_mm = NULL, *rq_key_mm = NULL; 1722 struct c4iw_mm_entry *sq_db_key_mm = NULL, *rq_db_key_mm = NULL; 1723 1724 CTR2(KTR_IW_CXGBE, "%s ib_pd %p", __func__, pd); 1725 1726 if (attrs->qp_type != IB_QPT_RC) 1727 return ERR_PTR(-EINVAL); 1728 1729 php = to_c4iw_pd(pd); 1730 rhp = php->rhp; 1731 schp = get_chp(rhp, ((struct c4iw_cq *)attrs->send_cq)->cq.cqid); 1732 rchp = get_chp(rhp, ((struct c4iw_cq *)attrs->recv_cq)->cq.cqid); 1733 if (!schp || !rchp) 1734 return ERR_PTR(-EINVAL); 1735 1736 if (attrs->cap.max_inline_data > T4_MAX_SEND_INLINE) 1737 return ERR_PTR(-EINVAL); 1738 1739 if (attrs->cap.max_recv_wr > rhp->rdev.hw_queue.t4_max_rq_size) 1740 return ERR_PTR(-E2BIG); 1741 rqsize = attrs->cap.max_recv_wr + 1; 1742 if (rqsize < 8) 1743 rqsize = 8; 1744 1745 if (attrs->cap.max_send_wr > rhp->rdev.hw_queue.t4_max_sq_size) 1746 return ERR_PTR(-E2BIG); 1747 sqsize = attrs->cap.max_send_wr + 1; 1748 if (sqsize < 8) 1749 sqsize = 8; 1750 1751 ucontext = pd->uobject ? to_c4iw_ucontext(pd->uobject->context) : NULL; 1752 1753 qhp = kzalloc(sizeof(*qhp), GFP_KERNEL); 1754 if (!qhp) 1755 return ERR_PTR(-ENOMEM); 1756 qhp->wq.sq.size = sqsize; 1757 qhp->wq.sq.memsize = 1758 (sqsize + rhp->rdev.hw_queue.t4_eq_status_entries) * 1759 sizeof(*qhp->wq.sq.queue) + 16 * sizeof(__be64); 1760 qhp->wq.sq.flush_cidx = -1; 1761 qhp->wq.rq.size = rqsize; 1762 qhp->wq.rq.memsize = 1763 (rqsize + rhp->rdev.hw_queue.t4_eq_status_entries) * 1764 sizeof(*qhp->wq.rq.queue); 1765 1766 if (ucontext) { 1767 qhp->wq.sq.memsize = roundup(qhp->wq.sq.memsize, PAGE_SIZE); 1768 qhp->wq.rq.memsize = roundup(qhp->wq.rq.memsize, PAGE_SIZE); 1769 } 1770 1771 CTR5(KTR_IW_CXGBE, "%s sqsize %u sqmemsize %zu rqsize %u rqmemsize %zu", 1772 __func__, sqsize, qhp->wq.sq.memsize, rqsize, qhp->wq.rq.memsize); 1773 1774 ret = create_qp(&rhp->rdev, &qhp->wq, &schp->cq, &rchp->cq, 1775 ucontext ? &ucontext->uctx : &rhp->rdev.uctx); 1776 if (ret) 1777 goto err1; 1778 1779 attrs->cap.max_recv_wr = rqsize - 1; 1780 attrs->cap.max_send_wr = sqsize - 1; 1781 attrs->cap.max_inline_data = T4_MAX_SEND_INLINE; 1782 1783 qhp->rhp = rhp; 1784 qhp->attr.pd = php->pdid; 1785 qhp->attr.scq = ((struct c4iw_cq *) attrs->send_cq)->cq.cqid; 1786 qhp->attr.rcq = ((struct c4iw_cq *) attrs->recv_cq)->cq.cqid; 1787 qhp->attr.sq_num_entries = attrs->cap.max_send_wr; 1788 qhp->attr.rq_num_entries = attrs->cap.max_recv_wr; 1789 qhp->attr.sq_max_sges = attrs->cap.max_send_sge; 1790 qhp->attr.sq_max_sges_rdma_write = attrs->cap.max_send_sge; 1791 qhp->attr.rq_max_sges = attrs->cap.max_recv_sge; 1792 qhp->attr.state = C4IW_QP_STATE_IDLE; 1793 qhp->attr.next_state = C4IW_QP_STATE_IDLE; 1794 qhp->attr.enable_rdma_read = 1; 1795 qhp->attr.enable_rdma_write = 1; 1796 qhp->attr.enable_bind = 1; 1797 qhp->attr.max_ord = 0; 1798 qhp->attr.max_ird = 0; 1799 qhp->sq_sig_all = attrs->sq_sig_type == IB_SIGNAL_ALL_WR; 1800 spin_lock_init(&qhp->lock); 1801 mutex_init(&qhp->mutex); 1802 init_waitqueue_head(&qhp->wait); 1803 kref_init(&qhp->kref); 1804 INIT_WORK(&qhp->free_work, free_qp_work); 1805 1806 ret = insert_handle(rhp, &rhp->qpidr, qhp, qhp->wq.sq.qid); 1807 if (ret) 1808 goto err2; 1809 1810 if (udata) { 1811 sq_key_mm = kmalloc(sizeof(*sq_key_mm), GFP_KERNEL); 1812 if (!sq_key_mm) { 1813 ret = -ENOMEM; 1814 goto err3; 1815 } 1816 rq_key_mm = kmalloc(sizeof(*rq_key_mm), GFP_KERNEL); 1817 if (!rq_key_mm) { 1818 ret = -ENOMEM; 1819 goto err4; 1820 } 1821 sq_db_key_mm = kmalloc(sizeof(*sq_db_key_mm), GFP_KERNEL); 1822 if (!sq_db_key_mm) { 1823 ret = -ENOMEM; 1824 goto err5; 1825 } 1826 rq_db_key_mm = kmalloc(sizeof(*rq_db_key_mm), GFP_KERNEL); 1827 if (!rq_db_key_mm) { 1828 ret = -ENOMEM; 1829 goto err6; 1830 } 1831 uresp.flags = 0; 1832 uresp.qid_mask = rhp->rdev.qpmask; 1833 uresp.sqid = qhp->wq.sq.qid; 1834 uresp.sq_size = qhp->wq.sq.size; 1835 uresp.sq_memsize = qhp->wq.sq.memsize; 1836 uresp.rqid = qhp->wq.rq.qid; 1837 uresp.rq_size = qhp->wq.rq.size; 1838 uresp.rq_memsize = qhp->wq.rq.memsize; 1839 spin_lock(&ucontext->mmap_lock); 1840 uresp.ma_sync_key = 0; 1841 uresp.sq_key = ucontext->key; 1842 ucontext->key += PAGE_SIZE; 1843 uresp.rq_key = ucontext->key; 1844 ucontext->key += PAGE_SIZE; 1845 uresp.sq_db_gts_key = ucontext->key; 1846 ucontext->key += PAGE_SIZE; 1847 uresp.rq_db_gts_key = ucontext->key; 1848 ucontext->key += PAGE_SIZE; 1849 spin_unlock(&ucontext->mmap_lock); 1850 ret = ib_copy_to_udata(udata, &uresp, sizeof uresp); 1851 if (ret) 1852 goto err7; 1853 sq_key_mm->key = uresp.sq_key; 1854 sq_key_mm->addr = qhp->wq.sq.phys_addr; 1855 sq_key_mm->len = PAGE_ALIGN(qhp->wq.sq.memsize); 1856 CTR4(KTR_IW_CXGBE, "%s sq_key_mm %x, %x, %d", __func__, 1857 sq_key_mm->key, sq_key_mm->addr, 1858 sq_key_mm->len); 1859 insert_mmap(ucontext, sq_key_mm); 1860 rq_key_mm->key = uresp.rq_key; 1861 rq_key_mm->addr = qhp->wq.rq.phys_addr; 1862 rq_key_mm->len = PAGE_ALIGN(qhp->wq.rq.memsize); 1863 CTR4(KTR_IW_CXGBE, "%s rq_key_mm %x, %x, %d", __func__, 1864 rq_key_mm->key, rq_key_mm->addr, 1865 rq_key_mm->len); 1866 insert_mmap(ucontext, rq_key_mm); 1867 sq_db_key_mm->key = uresp.sq_db_gts_key; 1868 sq_db_key_mm->addr = (u64)qhp->wq.sq.bar2_pa; 1869 sq_db_key_mm->len = PAGE_SIZE; 1870 CTR4(KTR_IW_CXGBE, "%s sq_db_key_mm %x, %x, %d", __func__, 1871 sq_db_key_mm->key, sq_db_key_mm->addr, 1872 sq_db_key_mm->len); 1873 insert_mmap(ucontext, sq_db_key_mm); 1874 rq_db_key_mm->key = uresp.rq_db_gts_key; 1875 rq_db_key_mm->addr = (u64)qhp->wq.rq.bar2_pa; 1876 rq_db_key_mm->len = PAGE_SIZE; 1877 CTR4(KTR_IW_CXGBE, "%s rq_db_key_mm %x, %x, %d", __func__, 1878 rq_db_key_mm->key, rq_db_key_mm->addr, 1879 rq_db_key_mm->len); 1880 insert_mmap(ucontext, rq_db_key_mm); 1881 1882 c4iw_get_ucontext(ucontext); 1883 qhp->ucontext = ucontext; 1884 } 1885 qhp->ibqp.qp_num = qhp->wq.sq.qid; 1886 init_timer(&(qhp->timer)); 1887 1888 CTR5(KTR_IW_CXGBE, "%s sq id %u size %u memsize %zu num_entries %u", 1889 __func__, qhp->wq.sq.qid, 1890 qhp->wq.sq.size, qhp->wq.sq.memsize, attrs->cap.max_send_wr); 1891 CTR5(KTR_IW_CXGBE, "%s rq id %u size %u memsize %zu num_entries %u", 1892 __func__, qhp->wq.rq.qid, 1893 qhp->wq.rq.size, qhp->wq.rq.memsize, attrs->cap.max_recv_wr); 1894 return &qhp->ibqp; 1895 err7: 1896 kfree(rq_db_key_mm); 1897 err6: 1898 kfree(sq_db_key_mm); 1899 err5: 1900 kfree(rq_key_mm); 1901 err4: 1902 kfree(sq_key_mm); 1903 err3: 1904 remove_handle(rhp, &rhp->qpidr, qhp->wq.sq.qid); 1905 err2: 1906 destroy_qp(&rhp->rdev, &qhp->wq, 1907 ucontext ? &ucontext->uctx : &rhp->rdev.uctx); 1908 err1: 1909 kfree(qhp); 1910 return ERR_PTR(ret); 1911 } 1912 1913 int c4iw_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 1914 int attr_mask, struct ib_udata *udata) 1915 { 1916 struct c4iw_dev *rhp; 1917 struct c4iw_qp *qhp; 1918 enum c4iw_qp_attr_mask mask = 0; 1919 struct c4iw_qp_attributes attrs; 1920 1921 CTR2(KTR_IW_CXGBE, "%s ib_qp %p", __func__, ibqp); 1922 1923 /* iwarp does not support the RTR state */ 1924 if ((attr_mask & IB_QP_STATE) && (attr->qp_state == IB_QPS_RTR)) 1925 attr_mask &= ~IB_QP_STATE; 1926 1927 /* Make sure we still have something left to do */ 1928 if (!attr_mask) 1929 return 0; 1930 1931 memset(&attrs, 0, sizeof attrs); 1932 qhp = to_c4iw_qp(ibqp); 1933 rhp = qhp->rhp; 1934 1935 attrs.next_state = c4iw_convert_state(attr->qp_state); 1936 attrs.enable_rdma_read = (attr->qp_access_flags & 1937 IB_ACCESS_REMOTE_READ) ? 1 : 0; 1938 attrs.enable_rdma_write = (attr->qp_access_flags & 1939 IB_ACCESS_REMOTE_WRITE) ? 1 : 0; 1940 attrs.enable_bind = (attr->qp_access_flags & IB_ACCESS_MW_BIND) ? 1 : 0; 1941 1942 1943 mask |= (attr_mask & IB_QP_STATE) ? C4IW_QP_ATTR_NEXT_STATE : 0; 1944 mask |= (attr_mask & IB_QP_ACCESS_FLAGS) ? 1945 (C4IW_QP_ATTR_ENABLE_RDMA_READ | 1946 C4IW_QP_ATTR_ENABLE_RDMA_WRITE | 1947 C4IW_QP_ATTR_ENABLE_RDMA_BIND) : 0; 1948 1949 return c4iw_modify_qp(rhp, qhp, mask, &attrs, 0); 1950 } 1951 1952 struct ib_qp *c4iw_get_qp(struct ib_device *dev, int qpn) 1953 { 1954 CTR3(KTR_IW_CXGBE, "%s ib_dev %p qpn 0x%x", __func__, dev, qpn); 1955 return (struct ib_qp *)get_qhp(to_c4iw_dev(dev), qpn); 1956 } 1957 1958 int c4iw_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, 1959 int attr_mask, struct ib_qp_init_attr *init_attr) 1960 { 1961 struct c4iw_qp *qhp = to_c4iw_qp(ibqp); 1962 1963 memset(attr, 0, sizeof *attr); 1964 memset(init_attr, 0, sizeof *init_attr); 1965 attr->qp_state = to_ib_qp_state(qhp->attr.state); 1966 init_attr->cap.max_send_wr = qhp->attr.sq_num_entries; 1967 init_attr->cap.max_recv_wr = qhp->attr.rq_num_entries; 1968 init_attr->cap.max_send_sge = qhp->attr.sq_max_sges; 1969 init_attr->cap.max_recv_sge = qhp->attr.sq_max_sges; 1970 init_attr->cap.max_inline_data = T4_MAX_SEND_INLINE; 1971 init_attr->sq_sig_type = qhp->sq_sig_all ? IB_SIGNAL_ALL_WR : 0; 1972 return 0; 1973 } 1974 #endif 1975