1 /* 2 * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * - Redistributions in binary form must reproduce the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer in the documentation and/or other materials 20 * provided with the distribution. 21 * 22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 23 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 24 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 25 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 26 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 27 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 28 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 29 * SOFTWARE. 30 */ 31 #ifndef __T4_H__ 32 #define __T4_H__ 33 34 #include "t4_hw.h" 35 #include "t4_regs.h" 36 #include "t4_msg.h" 37 #include "t4fw_ri_api.h" 38 39 #define T4_MAX_NUM_QP (1<<16) 40 #define T4_MAX_NUM_CQ (1<<15) 41 #define T4_MAX_NUM_PD (1<<15) 42 #define T4_EQ_STATUS_ENTRIES (L1_CACHE_BYTES > 64 ? 2 : 1) 43 #define T4_MAX_EQ_SIZE (65520 - T4_EQ_STATUS_ENTRIES) 44 #define T4_MAX_IQ_SIZE (65520 - 1) 45 #define T4_MAX_RQ_SIZE (8192 - T4_EQ_STATUS_ENTRIES) 46 #define T4_MAX_SQ_SIZE (T4_MAX_EQ_SIZE - 1) 47 #define T4_MAX_QP_DEPTH (T4_MAX_RQ_SIZE - 1) 48 #define T4_MAX_CQ_DEPTH (T4_MAX_IQ_SIZE - 1) 49 #define T4_MAX_NUM_STAG (1<<15) 50 #define T4_MAX_MR_SIZE (~0ULL - 1) 51 #define T4_PAGESIZE_MASK 0xffff000 /* 4KB-128MB */ 52 #define T4_STAG_UNSET 0xffffffff 53 #define T4_FW_MAJ 0 54 #define T4_EQ_STATUS_ENTRIES (L1_CACHE_BYTES > 64 ? 2 : 1) 55 #define A_PCIE_MA_SYNC 0x30b4 56 57 struct t4_status_page { 58 __be32 rsvd1; /* flit 0 - hw owns */ 59 __be16 rsvd2; 60 __be16 qid; 61 __be16 cidx; 62 __be16 pidx; 63 u8 qp_err; /* flit 1 - sw owns */ 64 u8 db_off; 65 u8 pad; 66 u16 host_wq_pidx; 67 u16 host_cidx; 68 u16 host_pidx; 69 }; 70 71 #define T4_EQ_ENTRY_SIZE 64 72 73 #define T4_SQ_NUM_SLOTS 5 74 #define T4_SQ_NUM_BYTES (T4_EQ_ENTRY_SIZE * T4_SQ_NUM_SLOTS) 75 #define T4_MAX_SEND_SGE ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_send_wr) - \ 76 sizeof(struct fw_ri_isgl)) / sizeof(struct fw_ri_sge)) 77 #define T4_MAX_SEND_INLINE ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_send_wr) - \ 78 sizeof(struct fw_ri_immd))) 79 #define T4_MAX_WRITE_INLINE ((T4_SQ_NUM_BYTES - \ 80 sizeof(struct fw_ri_rdma_write_wr) - \ 81 sizeof(struct fw_ri_immd))) 82 #define T4_MAX_WRITE_SGE ((T4_SQ_NUM_BYTES - \ 83 sizeof(struct fw_ri_rdma_write_wr) - \ 84 sizeof(struct fw_ri_isgl)) / sizeof(struct fw_ri_sge)) 85 #define T4_MAX_FR_IMMD ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_fr_nsmr_wr) - \ 86 sizeof(struct fw_ri_immd)) & ~31UL) 87 #define T4_MAX_FR_DEPTH (1024 / sizeof(u64)) 88 89 #define T4_RQ_NUM_SLOTS 2 90 #define T4_RQ_NUM_BYTES (T4_EQ_ENTRY_SIZE * T4_RQ_NUM_SLOTS) 91 #define T4_MAX_RECV_SGE 4 92 93 union t4_wr { 94 struct fw_ri_res_wr res; 95 struct fw_ri_wr ri; 96 struct fw_ri_rdma_write_wr write; 97 struct fw_ri_send_wr send; 98 struct fw_ri_rdma_read_wr read; 99 struct fw_ri_bind_mw_wr bind; 100 struct fw_ri_fr_nsmr_wr fr; 101 struct fw_ri_inv_lstag_wr inv; 102 struct t4_status_page status; 103 __be64 flits[T4_EQ_ENTRY_SIZE / sizeof(__be64) * T4_SQ_NUM_SLOTS]; 104 }; 105 106 union t4_recv_wr { 107 struct fw_ri_recv_wr recv; 108 struct t4_status_page status; 109 __be64 flits[T4_EQ_ENTRY_SIZE / sizeof(__be64) * T4_RQ_NUM_SLOTS]; 110 }; 111 112 static inline void init_wr_hdr(union t4_wr *wqe, u16 wrid, 113 enum fw_wr_opcodes opcode, u8 flags, u8 len16) 114 { 115 wqe->send.opcode = (u8)opcode; 116 wqe->send.flags = flags; 117 wqe->send.wrid = wrid; 118 wqe->send.r1[0] = 0; 119 wqe->send.r1[1] = 0; 120 wqe->send.r1[2] = 0; 121 wqe->send.len16 = len16; 122 } 123 124 /* CQE/AE status codes */ 125 #define T4_ERR_SUCCESS 0x0 126 #define T4_ERR_STAG 0x1 /* STAG invalid: either the */ 127 /* STAG is offlimt, being 0, */ 128 /* or STAG_key mismatch */ 129 #define T4_ERR_PDID 0x2 /* PDID mismatch */ 130 #define T4_ERR_QPID 0x3 /* QPID mismatch */ 131 #define T4_ERR_ACCESS 0x4 /* Invalid access right */ 132 #define T4_ERR_WRAP 0x5 /* Wrap error */ 133 #define T4_ERR_BOUND 0x6 /* base and bounds voilation */ 134 #define T4_ERR_INVALIDATE_SHARED_MR 0x7 /* attempt to invalidate a */ 135 /* shared memory region */ 136 #define T4_ERR_INVALIDATE_MR_WITH_MW_BOUND 0x8 /* attempt to invalidate a */ 137 /* shared memory region */ 138 #define T4_ERR_ECC 0x9 /* ECC error detected */ 139 #define T4_ERR_ECC_PSTAG 0xA /* ECC error detected when */ 140 /* reading PSTAG for a MW */ 141 /* Invalidate */ 142 #define T4_ERR_PBL_ADDR_BOUND 0xB /* pbl addr out of bounds: */ 143 /* software error */ 144 #define T4_ERR_SWFLUSH 0xC /* SW FLUSHED */ 145 #define T4_ERR_CRC 0x10 /* CRC error */ 146 #define T4_ERR_MARKER 0x11 /* Marker error */ 147 #define T4_ERR_PDU_LEN_ERR 0x12 /* invalid PDU length */ 148 #define T4_ERR_OUT_OF_RQE 0x13 /* out of RQE */ 149 #define T4_ERR_DDP_VERSION 0x14 /* wrong DDP version */ 150 #define T4_ERR_RDMA_VERSION 0x15 /* wrong RDMA version */ 151 #define T4_ERR_OPCODE 0x16 /* invalid rdma opcode */ 152 #define T4_ERR_DDP_QUEUE_NUM 0x17 /* invalid ddp queue number */ 153 #define T4_ERR_MSN 0x18 /* MSN error */ 154 #define T4_ERR_TBIT 0x19 /* tag bit not set correctly */ 155 #define T4_ERR_MO 0x1A /* MO not 0 for TERMINATE */ 156 /* or READ_REQ */ 157 #define T4_ERR_MSN_GAP 0x1B 158 #define T4_ERR_MSN_RANGE 0x1C 159 #define T4_ERR_IRD_OVERFLOW 0x1D 160 #define T4_ERR_RQE_ADDR_BOUND 0x1E /* RQE addr out of bounds: */ 161 /* software error */ 162 #define T4_ERR_INTERNAL_ERR 0x1F /* internal error (opcode */ 163 /* mismatch) */ 164 /* 165 * CQE defs 166 */ 167 struct t4_cqe { 168 __be32 header; 169 __be32 len; 170 union { 171 struct { 172 __be32 stag; 173 __be32 msn; 174 } rcqe; 175 struct { 176 u32 nada1; 177 u16 nada2; 178 u16 cidx; 179 } scqe; 180 struct { 181 __be32 wrid_hi; 182 __be32 wrid_low; 183 } gen; 184 } u; 185 __be64 reserved; 186 __be64 bits_type_ts; 187 }; 188 189 /* macros for flit 0 of the cqe */ 190 191 #define S_CQE_QPID 12 192 #define M_CQE_QPID 0xFFFFF 193 #define G_CQE_QPID(x) ((((x) >> S_CQE_QPID)) & M_CQE_QPID) 194 #define V_CQE_QPID(x) ((x)<<S_CQE_QPID) 195 196 #define S_CQE_SWCQE 11 197 #define M_CQE_SWCQE 0x1 198 #define G_CQE_SWCQE(x) ((((x) >> S_CQE_SWCQE)) & M_CQE_SWCQE) 199 #define V_CQE_SWCQE(x) ((x)<<S_CQE_SWCQE) 200 201 #define S_CQE_STATUS 5 202 #define M_CQE_STATUS 0x1F 203 #define G_CQE_STATUS(x) ((((x) >> S_CQE_STATUS)) & M_CQE_STATUS) 204 #define V_CQE_STATUS(x) ((x)<<S_CQE_STATUS) 205 206 #define S_CQE_TYPE 4 207 #define M_CQE_TYPE 0x1 208 #define G_CQE_TYPE(x) ((((x) >> S_CQE_TYPE)) & M_CQE_TYPE) 209 #define V_CQE_TYPE(x) ((x)<<S_CQE_TYPE) 210 211 #define S_CQE_OPCODE 0 212 #define M_CQE_OPCODE 0xF 213 #define G_CQE_OPCODE(x) ((((x) >> S_CQE_OPCODE)) & M_CQE_OPCODE) 214 #define V_CQE_OPCODE(x) ((x)<<S_CQE_OPCODE) 215 216 #define SW_CQE(x) (G_CQE_SWCQE(be32_to_cpu((x)->header))) 217 #define CQE_QPID(x) (G_CQE_QPID(be32_to_cpu((x)->header))) 218 #define CQE_TYPE(x) (G_CQE_TYPE(be32_to_cpu((x)->header))) 219 #define SQ_TYPE(x) (CQE_TYPE((x))) 220 #define RQ_TYPE(x) (!CQE_TYPE((x))) 221 #define CQE_STATUS(x) (G_CQE_STATUS(be32_to_cpu((x)->header))) 222 #define CQE_OPCODE(x) (G_CQE_OPCODE(be32_to_cpu((x)->header))) 223 224 #define CQE_SEND_OPCODE(x)( \ 225 (G_CQE_OPCODE(be32_to_cpu((x)->header)) == FW_RI_SEND) || \ 226 (G_CQE_OPCODE(be32_to_cpu((x)->header)) == FW_RI_SEND_WITH_SE) || \ 227 (G_CQE_OPCODE(be32_to_cpu((x)->header)) == FW_RI_SEND_WITH_INV) || \ 228 (G_CQE_OPCODE(be32_to_cpu((x)->header)) == FW_RI_SEND_WITH_SE_INV)) 229 230 #define CQE_LEN(x) (be32_to_cpu((x)->len)) 231 232 /* used for RQ completion processing */ 233 #define CQE_WRID_STAG(x) (be32_to_cpu((x)->u.rcqe.stag)) 234 #define CQE_WRID_MSN(x) (be32_to_cpu((x)->u.rcqe.msn)) 235 236 /* used for SQ completion processing */ 237 #define CQE_WRID_SQ_IDX(x) ((x)->u.scqe.cidx) 238 239 /* generic accessor macros */ 240 #define CQE_WRID_HI(x) ((x)->u.gen.wrid_hi) 241 #define CQE_WRID_LOW(x) ((x)->u.gen.wrid_low) 242 243 /* macros for flit 3 of the cqe */ 244 #define S_CQE_GENBIT 63 245 #define M_CQE_GENBIT 0x1 246 #define G_CQE_GENBIT(x) (((x) >> S_CQE_GENBIT) & M_CQE_GENBIT) 247 #define V_CQE_GENBIT(x) ((x)<<S_CQE_GENBIT) 248 249 #define S_CQE_OVFBIT 62 250 #define M_CQE_OVFBIT 0x1 251 #define G_CQE_OVFBIT(x) ((((x) >> S_CQE_OVFBIT)) & M_CQE_OVFBIT) 252 253 #define S_CQE_IQTYPE 60 254 #define M_CQE_IQTYPE 0x3 255 #define G_CQE_IQTYPE(x) ((((x) >> S_CQE_IQTYPE)) & M_CQE_IQTYPE) 256 257 #define M_CQE_TS 0x0fffffffffffffffULL 258 #define G_CQE_TS(x) ((x) & M_CQE_TS) 259 260 #define CQE_OVFBIT(x) ((unsigned)G_CQE_OVFBIT(be64_to_cpu((x)->bits_type_ts))) 261 #define CQE_GENBIT(x) ((unsigned)G_CQE_GENBIT(be64_to_cpu((x)->bits_type_ts))) 262 #define CQE_TS(x) (G_CQE_TS(be64_to_cpu((x)->bits_type_ts))) 263 264 struct t4_swsqe { 265 u64 wr_id; 266 struct t4_cqe cqe; 267 int read_len; 268 int opcode; 269 int complete; 270 int signaled; 271 u16 idx; 272 }; 273 274 static inline pgprot_t t4_pgprot_wc(pgprot_t prot) 275 { 276 #if defined(__i386__) || defined(__x86_64__) || defined(CONFIG_PPC64) 277 return pgprot_writecombine(prot); 278 #else 279 return pgprot_noncached(prot); 280 #endif 281 } 282 283 enum { 284 T4_SQ_ONCHIP = (1<<0), 285 }; 286 287 struct t4_sq { 288 union t4_wr *queue; 289 dma_addr_t dma_addr; 290 DEFINE_DMA_UNMAP_ADDR(mapping); 291 unsigned long phys_addr; 292 struct t4_swsqe *sw_sq; 293 struct t4_swsqe *oldest_read; 294 u64 udb; 295 size_t memsize; 296 u32 qid; 297 u16 in_use; 298 u16 size; 299 u16 cidx; 300 u16 pidx; 301 u16 wq_pidx; 302 u16 flags; 303 }; 304 305 struct t4_swrqe { 306 u64 wr_id; 307 }; 308 309 struct t4_rq { 310 union t4_recv_wr *queue; 311 dma_addr_t dma_addr; 312 DEFINE_DMA_UNMAP_ADDR(mapping); 313 struct t4_swrqe *sw_rq; 314 u64 udb; 315 size_t memsize; 316 u32 qid; 317 u32 msn; 318 u32 rqt_hwaddr; 319 u16 rqt_size; 320 u16 in_use; 321 u16 size; 322 u16 cidx; 323 u16 pidx; 324 u16 wq_pidx; 325 }; 326 327 struct t4_wq { 328 struct t4_sq sq; 329 struct t4_rq rq; 330 void __iomem *db; 331 void __iomem *gts; 332 struct c4iw_rdev *rdev; 333 }; 334 335 static inline int t4_rqes_posted(struct t4_wq *wq) 336 { 337 return wq->rq.in_use; 338 } 339 340 static inline int t4_rq_empty(struct t4_wq *wq) 341 { 342 return wq->rq.in_use == 0; 343 } 344 345 static inline int t4_rq_full(struct t4_wq *wq) 346 { 347 return wq->rq.in_use == (wq->rq.size - 1); 348 } 349 350 static inline u32 t4_rq_avail(struct t4_wq *wq) 351 { 352 return wq->rq.size - 1 - wq->rq.in_use; 353 } 354 355 static inline void t4_rq_produce(struct t4_wq *wq, u8 len16) 356 { 357 wq->rq.in_use++; 358 if (++wq->rq.pidx == wq->rq.size) 359 wq->rq.pidx = 0; 360 wq->rq.wq_pidx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); 361 if (wq->rq.wq_pidx >= wq->rq.size * T4_RQ_NUM_SLOTS) 362 wq->rq.wq_pidx %= wq->rq.size * T4_RQ_NUM_SLOTS; 363 } 364 365 static inline void t4_rq_consume(struct t4_wq *wq) 366 { 367 wq->rq.in_use--; 368 wq->rq.msn++; 369 if (++wq->rq.cidx == wq->rq.size) 370 wq->rq.cidx = 0; 371 } 372 373 static inline u16 t4_rq_host_wq_pidx(struct t4_wq *wq) 374 { 375 return wq->rq.queue[wq->rq.size].status.host_wq_pidx; 376 } 377 378 static inline u16 t4_rq_wq_size(struct t4_wq *wq) 379 { 380 return wq->rq.size * T4_RQ_NUM_SLOTS; 381 } 382 383 static inline int t4_sq_onchip(struct t4_sq *sq) 384 { 385 return sq->flags & T4_SQ_ONCHIP; 386 } 387 388 static inline int t4_sq_empty(struct t4_wq *wq) 389 { 390 return wq->sq.in_use == 0; 391 } 392 393 static inline int t4_sq_full(struct t4_wq *wq) 394 { 395 return wq->sq.in_use == (wq->sq.size - 1); 396 } 397 398 static inline u32 t4_sq_avail(struct t4_wq *wq) 399 { 400 return wq->sq.size - 1 - wq->sq.in_use; 401 } 402 403 static inline void t4_sq_produce(struct t4_wq *wq, u8 len16) 404 { 405 wq->sq.in_use++; 406 if (++wq->sq.pidx == wq->sq.size) 407 wq->sq.pidx = 0; 408 wq->sq.wq_pidx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); 409 if (wq->sq.wq_pidx >= wq->sq.size * T4_SQ_NUM_SLOTS) 410 wq->sq.wq_pidx %= wq->sq.size * T4_SQ_NUM_SLOTS; 411 } 412 413 static inline void t4_sq_consume(struct t4_wq *wq) 414 { 415 wq->sq.in_use--; 416 if (++wq->sq.cidx == wq->sq.size) 417 wq->sq.cidx = 0; 418 } 419 420 static inline u16 t4_sq_host_wq_pidx(struct t4_wq *wq) 421 { 422 return wq->sq.queue[wq->sq.size].status.host_wq_pidx; 423 } 424 425 static inline u16 t4_sq_wq_size(struct t4_wq *wq) 426 { 427 return wq->sq.size * T4_SQ_NUM_SLOTS; 428 } 429 430 static inline void t4_ring_sq_db(struct t4_wq *wq, u16 inc) 431 { 432 wmb(); 433 writel(QID(wq->sq.qid) | PIDX(inc), wq->db); 434 } 435 436 static inline void t4_ring_rq_db(struct t4_wq *wq, u16 inc) 437 { 438 wmb(); 439 writel(QID(wq->rq.qid) | PIDX(inc), wq->db); 440 } 441 442 static inline int t4_wq_in_error(struct t4_wq *wq) 443 { 444 return wq->rq.queue[wq->rq.size].status.qp_err; 445 } 446 447 static inline void t4_set_wq_in_error(struct t4_wq *wq) 448 { 449 wq->rq.queue[wq->rq.size].status.qp_err = 1; 450 } 451 452 static inline void t4_disable_wq_db(struct t4_wq *wq) 453 { 454 wq->rq.queue[wq->rq.size].status.db_off = 1; 455 } 456 457 static inline void t4_enable_wq_db(struct t4_wq *wq) 458 { 459 wq->rq.queue[wq->rq.size].status.db_off = 0; 460 } 461 462 static inline int t4_wq_db_enabled(struct t4_wq *wq) 463 { 464 return !wq->rq.queue[wq->rq.size].status.db_off; 465 } 466 467 struct t4_cq { 468 struct t4_cqe *queue; 469 dma_addr_t dma_addr; 470 DEFINE_DMA_UNMAP_ADDR(mapping); 471 struct t4_cqe *sw_queue; 472 void __iomem *gts; 473 struct c4iw_rdev *rdev; 474 u64 ugts; 475 size_t memsize; 476 __be64 bits_type_ts; 477 u32 cqid; 478 u16 size; /* including status page */ 479 u16 cidx; 480 u16 sw_pidx; 481 u16 sw_cidx; 482 u16 sw_in_use; 483 u16 cidx_inc; 484 u8 gen; 485 u8 error; 486 }; 487 488 static inline int t4_arm_cq(struct t4_cq *cq, int se) 489 { 490 u32 val; 491 492 while (cq->cidx_inc > CIDXINC_MASK) { 493 val = SEINTARM(0) | CIDXINC(CIDXINC_MASK) | TIMERREG(7) | 494 INGRESSQID(cq->cqid); 495 writel(val, cq->gts); 496 cq->cidx_inc -= CIDXINC_MASK; 497 } 498 val = SEINTARM(se) | CIDXINC(cq->cidx_inc) | TIMERREG(6) | 499 INGRESSQID(cq->cqid); 500 writel(val, cq->gts); 501 cq->cidx_inc = 0; 502 return 0; 503 } 504 505 static inline void t4_swcq_produce(struct t4_cq *cq) 506 { 507 cq->sw_in_use++; 508 if (++cq->sw_pidx == cq->size) 509 cq->sw_pidx = 0; 510 } 511 512 static inline void t4_swcq_consume(struct t4_cq *cq) 513 { 514 cq->sw_in_use--; 515 if (++cq->sw_cidx == cq->size) 516 cq->sw_cidx = 0; 517 } 518 519 static inline void t4_hwcq_consume(struct t4_cq *cq) 520 { 521 cq->bits_type_ts = cq->queue[cq->cidx].bits_type_ts; 522 if (++cq->cidx_inc == (cq->size >> 4)) { 523 u32 val; 524 525 val = SEINTARM(0) | CIDXINC(cq->cidx_inc) | TIMERREG(7) | 526 INGRESSQID(cq->cqid); 527 writel(val, cq->gts); 528 cq->cidx_inc = 0; 529 } 530 if (++cq->cidx == cq->size) { 531 cq->cidx = 0; 532 cq->gen ^= 1; 533 } 534 } 535 536 static inline int t4_valid_cqe(struct t4_cq *cq, struct t4_cqe *cqe) 537 { 538 return (CQE_GENBIT(cqe) == cq->gen); 539 } 540 541 static inline int t4_next_hw_cqe(struct t4_cq *cq, struct t4_cqe **cqe) 542 { 543 int ret; 544 u16 prev_cidx; 545 546 if (cq->cidx == 0) 547 prev_cidx = cq->size - 1; 548 else 549 prev_cidx = cq->cidx - 1; 550 551 if (cq->queue[prev_cidx].bits_type_ts != cq->bits_type_ts) { 552 ret = -EOVERFLOW; 553 cq->error = 1; 554 printk(KERN_ERR MOD "cq overflow cqid %u\n", cq->cqid); 555 } else if (t4_valid_cqe(cq, &cq->queue[cq->cidx])) { 556 *cqe = &cq->queue[cq->cidx]; 557 ret = 0; 558 } else 559 ret = -ENODATA; 560 return ret; 561 } 562 563 static inline struct t4_cqe *t4_next_sw_cqe(struct t4_cq *cq) 564 { 565 if (cq->sw_in_use) 566 return &cq->sw_queue[cq->sw_cidx]; 567 return NULL; 568 } 569 570 static inline int t4_next_cqe(struct t4_cq *cq, struct t4_cqe **cqe) 571 { 572 int ret = 0; 573 574 if (cq->error) 575 ret = -ENODATA; 576 else if (cq->sw_in_use) 577 *cqe = &cq->sw_queue[cq->sw_cidx]; 578 else 579 ret = t4_next_hw_cqe(cq, cqe); 580 return ret; 581 } 582 583 static inline int t4_cq_in_error(struct t4_cq *cq) 584 { 585 return ((struct t4_status_page *)&cq->queue[cq->size])->qp_err; 586 } 587 588 static inline void t4_set_cq_in_error(struct t4_cq *cq) 589 { 590 ((struct t4_status_page *)&cq->queue[cq->size])->qp_err = 1; 591 } 592 #endif 593