drivers/infiniband/hw/irdma/uk.c

   1 // SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB
   2 /* Copyright (c) 2015 - 2021 Intel Corporation */
   3 #include "osdep.h"
   4 #include "defs.h"
   5 #include "user.h"
   6 #include "irdma.h"
   7
   8 /**
   9  * irdma_set_fragment - set fragment in wqe
  10  * @wqe: wqe for setting fragment
  11  * @offset: offset value
  12  * @sge: sge length and stag
  13  * @valid: The wqe valid
  14  */
  15 static void irdma_set_fragment(__le64 *wqe, u32 offset, struct ib_sge *sge,
  16                                u8 valid)
  17 {
  18         if (sge) {
  19                 set_64bit_val(wqe, offset,
  20                               FIELD_PREP(IRDMAQPSQ_FRAG_TO, sge->addr));
  21                 set_64bit_val(wqe, offset + 8,
  22                               FIELD_PREP(IRDMAQPSQ_VALID, valid) |
  23                               FIELD_PREP(IRDMAQPSQ_FRAG_LEN, sge->length) |
  24                               FIELD_PREP(IRDMAQPSQ_FRAG_STAG, sge->lkey));
  25         } else {
  26                 set_64bit_val(wqe, offset, 0);
  27                 set_64bit_val(wqe, offset + 8,
  28                               FIELD_PREP(IRDMAQPSQ_VALID, valid));
  29         }
  30 }
  31
  32 /**
  33  * irdma_set_fragment_gen_1 - set fragment in wqe
  34  * @wqe: wqe for setting fragment
  35  * @offset: offset value
  36  * @sge: sge length and stag
  37  * @valid: wqe valid flag
  38  */
  39 static void irdma_set_fragment_gen_1(__le64 *wqe, u32 offset,
  40                                      struct ib_sge *sge, u8 valid)
  41 {
  42         if (sge) {
  43                 set_64bit_val(wqe, offset,
  44                               FIELD_PREP(IRDMAQPSQ_FRAG_TO, sge->addr));
  45                 set_64bit_val(wqe, offset + 8,
  46                               FIELD_PREP(IRDMAQPSQ_GEN1_FRAG_LEN, sge->length) |
  47                               FIELD_PREP(IRDMAQPSQ_GEN1_FRAG_STAG, sge->lkey));
  48         } else {
  49                 set_64bit_val(wqe, offset, 0);
  50                 set_64bit_val(wqe, offset + 8, 0);
  51         }
  52 }
  53
  54 /**
  55  * irdma_nop_1 - insert a NOP wqe
  56  * @qp: hw qp ptr
  57  */
  58 static int irdma_nop_1(struct irdma_qp_uk *qp)
  59 {
  60         u64 hdr;
  61         __le64 *wqe;
  62         u32 wqe_idx;
  63         bool signaled = false;
  64
  65         if (!qp->sq_ring.head)
  66                 return -EINVAL;
  67
  68         wqe_idx = IRDMA_RING_CURRENT_HEAD(qp->sq_ring);
  69         wqe = qp->sq_base[wqe_idx].elem;
  70
  71         qp->sq_wrtrk_array[wqe_idx].quanta = IRDMA_QP_WQE_MIN_QUANTA;
  72
  73         set_64bit_val(wqe, 0, 0);
  74         set_64bit_val(wqe, 8, 0);
  75         set_64bit_val(wqe, 16, 0);
  76
  77         hdr = FIELD_PREP(IRDMAQPSQ_OPCODE, IRDMAQP_OP_NOP) |
  78               FIELD_PREP(IRDMAQPSQ_SIGCOMPL, signaled) |
  79               FIELD_PREP(IRDMAQPSQ_VALID, qp->swqe_polarity);
  80
  81         /* make sure WQE is written before valid bit is set */
  82         dma_wmb();
  83
  84         set_64bit_val(wqe, 24, hdr);
  85
  86         return 0;
  87 }
  88
  89 /**
  90  * irdma_clr_wqes - clear next 128 sq entries
  91  * @qp: hw qp ptr
  92  * @qp_wqe_idx: wqe_idx
  93  */
  94 void irdma_clr_wqes(struct irdma_qp_uk *qp, u32 qp_wqe_idx)
  95 {
  96         struct irdma_qp_quanta *sq;
  97         u32 wqe_idx;
  98
  99         if (!(qp_wqe_idx & 0x7F)) {
 100                 wqe_idx = (qp_wqe_idx + 128) % qp->sq_ring.size;
 101                 sq = qp->sq_base + wqe_idx;
 102                 if (wqe_idx)
 103                         memset(sq, qp->swqe_polarity ? 0 : 0xFF,
 104                                128 * sizeof(*sq));
 105                 else
 106                         memset(sq, qp->swqe_polarity ? 0xFF : 0,
 107                                128 * sizeof(*sq));
 108         }
 109 }
 110
 111 /**
 112  * irdma_uk_qp_post_wr - ring doorbell
 113  * @qp: hw qp ptr
 114  */
 115 void irdma_uk_qp_post_wr(struct irdma_qp_uk *qp)
 116 {
 117         u64 temp;
 118         u32 hw_sq_tail;
 119         u32 sw_sq_head;
 120
 121         /* valid bit is written and loads completed before reading shadow */
 122         mb();
 123
 124         /* read the doorbell shadow area */
 125         get_64bit_val(qp->shadow_area, 0, &temp);
 126
 127         hw_sq_tail = (u32)FIELD_GET(IRDMA_QP_DBSA_HW_SQ_TAIL, temp);
 128         sw_sq_head = IRDMA_RING_CURRENT_HEAD(qp->sq_ring);
 129         if (sw_sq_head != qp->initial_ring.head) {
 130                 if (qp->push_dropped) {
 131                         writel(qp->qp_id, qp->wqe_alloc_db);
 132                         qp->push_dropped = false;
 133                 } else if (sw_sq_head != hw_sq_tail) {
 134                         if (sw_sq_head > qp->initial_ring.head) {
 135                                 if (hw_sq_tail >= qp->initial_ring.head &&
 136                                     hw_sq_tail < sw_sq_head)
 137                                         writel(qp->qp_id, qp->wqe_alloc_db);
 138                         } else {
 139                                 if (hw_sq_tail >= qp->initial_ring.head ||
 140                                     hw_sq_tail < sw_sq_head)
 141                                         writel(qp->qp_id, qp->wqe_alloc_db);
 142                         }
 143                 }
 144         }
 145
 146         qp->initial_ring.head = qp->sq_ring.head;
 147 }
 148
 149 /**
 150  * irdma_qp_ring_push_db -  ring qp doorbell
 151  * @qp: hw qp ptr
 152  * @wqe_idx: wqe index
 153  */
 154 static void irdma_qp_ring_push_db(struct irdma_qp_uk *qp, u32 wqe_idx)
 155 {
 156         set_32bit_val(qp->push_db, 0,
 157                       FIELD_PREP(IRDMA_WQEALLOC_WQE_DESC_INDEX, wqe_idx >> 3) | qp->qp_id);
 158         qp->initial_ring.head = qp->sq_ring.head;
 159         qp->push_mode = true;
 160         qp->push_dropped = false;
 161 }
 162
 163 void irdma_qp_push_wqe(struct irdma_qp_uk *qp, __le64 *wqe, u16 quanta,
 164                        u32 wqe_idx, bool post_sq)
 165 {
 166         __le64 *push;
 167
 168         if (IRDMA_RING_CURRENT_HEAD(qp->initial_ring) !=
 169                     IRDMA_RING_CURRENT_TAIL(qp->sq_ring) &&
 170             !qp->push_mode) {
 171                 if (post_sq)
 172                         irdma_uk_qp_post_wr(qp);
 173         } else {
 174                 push = (__le64 *)((uintptr_t)qp->push_wqe +
 175                                   (wqe_idx & 0x7) * 0x20);
 176                 memcpy(push, wqe, quanta * IRDMA_QP_WQE_MIN_SIZE);
 177                 irdma_qp_ring_push_db(qp, wqe_idx);
 178         }
 179 }
 180
 181 /**
 182  * irdma_qp_get_next_send_wqe - pad with NOP if needed, return where next WR should go
 183  * @qp: hw qp ptr
 184  * @wqe_idx: return wqe index
 185  * @quanta: size of WR in quanta
 186  * @total_size: size of WR in bytes
 187  * @info: info on WR
 188  */
 189 __le64 *irdma_qp_get_next_send_wqe(struct irdma_qp_uk *qp, u32 *wqe_idx,
 190                                    u16 quanta, u32 total_size,
 191                                    struct irdma_post_sq_info *info)
 192 {
 193         __le64 *wqe;
 194         __le64 *wqe_0 = NULL;
 195         u32 nop_wqe_idx;
 196         u16 avail_quanta;
 197         u16 i;
 198
 199         avail_quanta = qp->uk_attrs->max_hw_sq_chunk -
 200                        (IRDMA_RING_CURRENT_HEAD(qp->sq_ring) %
 201                        qp->uk_attrs->max_hw_sq_chunk);
 202         if (quanta <= avail_quanta) {
 203                 /* WR fits in current chunk */
 204                 if (quanta > IRDMA_SQ_RING_FREE_QUANTA(qp->sq_ring))
 205                         return NULL;
 206         } else {
 207                 /* Need to pad with NOP */
 208                 if (quanta + avail_quanta >
 209                         IRDMA_SQ_RING_FREE_QUANTA(qp->sq_ring))
 210                         return NULL;
 211
 212                 nop_wqe_idx = IRDMA_RING_CURRENT_HEAD(qp->sq_ring);
 213                 for (i = 0; i < avail_quanta; i++) {
 214                         irdma_nop_1(qp);
 215                         IRDMA_RING_MOVE_HEAD_NOCHECK(qp->sq_ring);
 216                 }
 217                 if (qp->push_db && info->push_wqe)
 218                         irdma_qp_push_wqe(qp, qp->sq_base[nop_wqe_idx].elem,
 219                                           avail_quanta, nop_wqe_idx, true);
 220         }
 221
 222         *wqe_idx = IRDMA_RING_CURRENT_HEAD(qp->sq_ring);
 223         if (!*wqe_idx)
 224                 qp->swqe_polarity = !qp->swqe_polarity;
 225
 226         IRDMA_RING_MOVE_HEAD_BY_COUNT_NOCHECK(qp->sq_ring, quanta);
 227
 228         wqe = qp->sq_base[*wqe_idx].elem;
 229         if (qp->uk_attrs->hw_rev == IRDMA_GEN_1 && quanta == 1 &&
 230             (IRDMA_RING_CURRENT_HEAD(qp->sq_ring) & 1)) {
 231                 wqe_0 = qp->sq_base[IRDMA_RING_CURRENT_HEAD(qp->sq_ring)].elem;
 232                 wqe_0[3] = cpu_to_le64(FIELD_PREP(IRDMAQPSQ_VALID, qp->swqe_polarity ? 0 : 1));
 233         }
 234         qp->sq_wrtrk_array[*wqe_idx].wrid = info->wr_id;
 235         qp->sq_wrtrk_array[*wqe_idx].wr_len = total_size;
 236         qp->sq_wrtrk_array[*wqe_idx].quanta = quanta;
 237
 238         return wqe;
 239 }
 240
 241 /**
 242  * irdma_qp_get_next_recv_wqe - get next qp's rcv wqe
 243  * @qp: hw qp ptr
 244  * @wqe_idx: return wqe index
 245  */
 246 __le64 *irdma_qp_get_next_recv_wqe(struct irdma_qp_uk *qp, u32 *wqe_idx)
 247 {
 248         __le64 *wqe;
 249         int ret_code;
 250
 251         if (IRDMA_RING_FULL_ERR(qp->rq_ring))
 252                 return NULL;
 253
 254         IRDMA_ATOMIC_RING_MOVE_HEAD(qp->rq_ring, *wqe_idx, ret_code);
 255         if (ret_code)
 256                 return NULL;
 257
 258         if (!*wqe_idx)
 259                 qp->rwqe_polarity = !qp->rwqe_polarity;
 260         /* rq_wqe_size_multiplier is no of 32 byte quanta in one rq wqe */
 261         wqe = qp->rq_base[*wqe_idx * qp->rq_wqe_size_multiplier].elem;
 262
 263         return wqe;
 264 }
 265
 266 /**
 267  * irdma_uk_rdma_write - rdma write operation
 268  * @qp: hw qp ptr
 269  * @info: post sq information
 270  * @post_sq: flag to post sq
 271  */
 272 int irdma_uk_rdma_write(struct irdma_qp_uk *qp, struct irdma_post_sq_info *info,
 273                         bool post_sq)
 274 {
 275         u64 hdr;
 276         __le64 *wqe;
 277         struct irdma_rdma_write *op_info;
 278         u32 i, wqe_idx;
 279         u32 total_size = 0, byte_off;
 280         int ret_code;
 281         u32 frag_cnt, addl_frag_cnt;
 282         bool read_fence = false;
 283         u16 quanta;
 284
 285         info->push_wqe = qp->push_db ? true : false;
 286
 287         op_info = &info->op.rdma_write;
 288         if (op_info->num_lo_sges > qp->max_sq_frag_cnt)
 289                 return -EINVAL;
 290
 291         for (i = 0; i < op_info->num_lo_sges; i++)
 292                 total_size += op_info->lo_sg_list[i].length;
 293
 294         read_fence |= info->read_fence;
 295
 296         if (info->imm_data_valid)
 297                 frag_cnt = op_info->num_lo_sges + 1;
 298         else
 299                 frag_cnt = op_info->num_lo_sges;
 300         addl_frag_cnt = frag_cnt > 1 ? (frag_cnt - 1) : 0;
 301         ret_code = irdma_fragcnt_to_quanta_sq(frag_cnt, &quanta);
 302         if (ret_code)
 303                 return ret_code;
 304
 305         wqe = irdma_qp_get_next_send_wqe(qp, &wqe_idx, quanta, total_size,
 306                                          info);
 307         if (!wqe)
 308                 return -ENOMEM;
 309
 310         irdma_clr_wqes(qp, wqe_idx);
 311
 312         set_64bit_val(wqe, 16,
 313                       FIELD_PREP(IRDMAQPSQ_FRAG_TO, op_info->rem_addr.addr));
 314
 315         if (info->imm_data_valid) {
 316                 set_64bit_val(wqe, 0,
 317                               FIELD_PREP(IRDMAQPSQ_IMMDATA, info->imm_data));
 318                 i = 0;
 319         } else {
 320                 qp->wqe_ops.iw_set_fragment(wqe, 0,
 321                                             op_info->lo_sg_list,
 322                                             qp->swqe_polarity);
 323                 i = 1;
 324         }
 325
 326         for (byte_off = 32; i < op_info->num_lo_sges; i++) {
 327                 qp->wqe_ops.iw_set_fragment(wqe, byte_off,
 328                                             &op_info->lo_sg_list[i],
 329                                             qp->swqe_polarity);
 330                 byte_off += 16;
 331         }
 332
 333         /* if not an odd number set valid bit in next fragment */
 334         if (qp->uk_attrs->hw_rev >= IRDMA_GEN_2 && !(frag_cnt & 0x01) &&
 335             frag_cnt) {
 336                 qp->wqe_ops.iw_set_fragment(wqe, byte_off, NULL,
 337                                             qp->swqe_polarity);
 338                 if (qp->uk_attrs->hw_rev == IRDMA_GEN_2)
 339                         ++addl_frag_cnt;
 340         }
 341
 342         hdr = FIELD_PREP(IRDMAQPSQ_REMSTAG, op_info->rem_addr.lkey) |
 343               FIELD_PREP(IRDMAQPSQ_OPCODE, info->op_type) |
 344               FIELD_PREP(IRDMAQPSQ_IMMDATAFLAG, info->imm_data_valid) |
 345               FIELD_PREP(IRDMAQPSQ_REPORTRTT, info->report_rtt) |
 346               FIELD_PREP(IRDMAQPSQ_ADDFRAGCNT, addl_frag_cnt) |
 347               FIELD_PREP(IRDMAQPSQ_PUSHWQE, info->push_wqe) |
 348               FIELD_PREP(IRDMAQPSQ_READFENCE, read_fence) |
 349               FIELD_PREP(IRDMAQPSQ_LOCALFENCE, info->local_fence) |
 350               FIELD_PREP(IRDMAQPSQ_SIGCOMPL, info->signaled) |
 351               FIELD_PREP(IRDMAQPSQ_VALID, qp->swqe_polarity);
 352
 353         dma_wmb(); /* make sure WQE is populated before valid bit is set */
 354
 355         set_64bit_val(wqe, 24, hdr);
 356         if (info->push_wqe) {
 357                 irdma_qp_push_wqe(qp, wqe, quanta, wqe_idx, post_sq);
 358         } else {
 359                 if (post_sq)
 360                         irdma_uk_qp_post_wr(qp);
 361         }
 362
 363         return 0;
 364 }
 365
 366 /**
 367  * irdma_uk_rdma_read - rdma read command
 368  * @qp: hw qp ptr
 369  * @info: post sq information
 370  * @inv_stag: flag for inv_stag
 371  * @post_sq: flag to post sq
 372  */
 373 int irdma_uk_rdma_read(struct irdma_qp_uk *qp, struct irdma_post_sq_info *info,
 374                        bool inv_stag, bool post_sq)
 375 {
 376         struct irdma_rdma_read *op_info;
 377         int ret_code;
 378         u32 i, byte_off, total_size = 0;
 379         bool local_fence = false;
 380         u32 addl_frag_cnt;
 381         __le64 *wqe;
 382         u32 wqe_idx;
 383         u16 quanta;
 384         u64 hdr;
 385
 386         info->push_wqe = qp->push_db ? true : false;
 387
 388         op_info = &info->op.rdma_read;
 389         if (qp->max_sq_frag_cnt < op_info->num_lo_sges)
 390                 return -EINVAL;
 391
 392         for (i = 0; i < op_info->num_lo_sges; i++)
 393                 total_size += op_info->lo_sg_list[i].length;
 394
 395         ret_code = irdma_fragcnt_to_quanta_sq(op_info->num_lo_sges, &quanta);
 396         if (ret_code)
 397                 return ret_code;
 398
 399         wqe = irdma_qp_get_next_send_wqe(qp, &wqe_idx, quanta, total_size,
 400                                          info);
 401         if (!wqe)
 402                 return -ENOMEM;
 403
 404         irdma_clr_wqes(qp, wqe_idx);
 405
 406         addl_frag_cnt = op_info->num_lo_sges > 1 ?
 407                         (op_info->num_lo_sges - 1) : 0;
 408         local_fence |= info->local_fence;
 409
 410         qp->wqe_ops.iw_set_fragment(wqe, 0, op_info->lo_sg_list,
 411                                     qp->swqe_polarity);
 412         for (i = 1, byte_off = 32; i < op_info->num_lo_sges; ++i) {
 413                 qp->wqe_ops.iw_set_fragment(wqe, byte_off,
 414                                             &op_info->lo_sg_list[i],
 415                                             qp->swqe_polarity);
 416                 byte_off += 16;
 417         }
 418
 419         /* if not an odd number set valid bit in next fragment */
 420         if (qp->uk_attrs->hw_rev >= IRDMA_GEN_2 &&
 421             !(op_info->num_lo_sges & 0x01) && op_info->num_lo_sges) {
 422                 qp->wqe_ops.iw_set_fragment(wqe, byte_off, NULL,
 423                                             qp->swqe_polarity);
 424                 if (qp->uk_attrs->hw_rev == IRDMA_GEN_2)
 425                         ++addl_frag_cnt;
 426         }
 427         set_64bit_val(wqe, 16,
 428                       FIELD_PREP(IRDMAQPSQ_FRAG_TO, op_info->rem_addr.addr));
 429         hdr = FIELD_PREP(IRDMAQPSQ_REMSTAG, op_info->rem_addr.lkey) |
 430               FIELD_PREP(IRDMAQPSQ_REPORTRTT, (info->report_rtt ? 1 : 0)) |
 431               FIELD_PREP(IRDMAQPSQ_ADDFRAGCNT, addl_frag_cnt) |
 432               FIELD_PREP(IRDMAQPSQ_OPCODE,
 433                          (inv_stag ? IRDMAQP_OP_RDMA_READ_LOC_INV : IRDMAQP_OP_RDMA_READ)) |
 434               FIELD_PREP(IRDMAQPSQ_PUSHWQE, info->push_wqe) |
 435               FIELD_PREP(IRDMAQPSQ_READFENCE, info->read_fence) |
 436               FIELD_PREP(IRDMAQPSQ_LOCALFENCE, local_fence) |
 437               FIELD_PREP(IRDMAQPSQ_SIGCOMPL, info->signaled) |
 438               FIELD_PREP(IRDMAQPSQ_VALID, qp->swqe_polarity);
 439
 440         dma_wmb(); /* make sure WQE is populated before valid bit is set */
 441
 442         set_64bit_val(wqe, 24, hdr);
 443         if (info->push_wqe) {
 444                 irdma_qp_push_wqe(qp, wqe, quanta, wqe_idx, post_sq);
 445         } else {
 446                 if (post_sq)
 447                         irdma_uk_qp_post_wr(qp);
 448         }
 449
 450         return 0;
 451 }
 452
 453 /**
 454  * irdma_uk_send - rdma send command
 455  * @qp: hw qp ptr
 456  * @info: post sq information
 457  * @post_sq: flag to post sq
 458  */
 459 int irdma_uk_send(struct irdma_qp_uk *qp, struct irdma_post_sq_info *info,
 460                   bool post_sq)
 461 {
 462         __le64 *wqe;
 463         struct irdma_post_send *op_info;
 464         u64 hdr;
 465         u32 i, wqe_idx, total_size = 0, byte_off;
 466         int ret_code;
 467         u32 frag_cnt, addl_frag_cnt;
 468         bool read_fence = false;
 469         u16 quanta;
 470
 471         info->push_wqe = qp->push_db ? true : false;
 472
 473         op_info = &info->op.send;
 474         if (qp->max_sq_frag_cnt < op_info->num_sges)
 475                 return -EINVAL;
 476
 477         for (i = 0; i < op_info->num_sges; i++)
 478                 total_size += op_info->sg_list[i].length;
 479
 480         if (info->imm_data_valid)
 481                 frag_cnt = op_info->num_sges + 1;
 482         else
 483                 frag_cnt = op_info->num_sges;
 484         ret_code = irdma_fragcnt_to_quanta_sq(frag_cnt, &quanta);
 485         if (ret_code)
 486                 return ret_code;
 487
 488         wqe = irdma_qp_get_next_send_wqe(qp, &wqe_idx, quanta, total_size,
 489                                          info);
 490         if (!wqe)
 491                 return -ENOMEM;
 492
 493         irdma_clr_wqes(qp, wqe_idx);
 494
 495         read_fence |= info->read_fence;
 496         addl_frag_cnt = frag_cnt > 1 ? (frag_cnt - 1) : 0;
 497         if (info->imm_data_valid) {
 498                 set_64bit_val(wqe, 0,
 499                               FIELD_PREP(IRDMAQPSQ_IMMDATA, info->imm_data));
 500                 i = 0;
 501         } else {
 502                 qp->wqe_ops.iw_set_fragment(wqe, 0,
 503                                             frag_cnt ? op_info->sg_list : NULL,
 504                                             qp->swqe_polarity);
 505                 i = 1;
 506         }
 507
 508         for (byte_off = 32; i < op_info->num_sges; i++) {
 509                 qp->wqe_ops.iw_set_fragment(wqe, byte_off, &op_info->sg_list[i],
 510                                             qp->swqe_polarity);
 511                 byte_off += 16;
 512         }
 513
 514         /* if not an odd number set valid bit in next fragment */
 515         if (qp->uk_attrs->hw_rev >= IRDMA_GEN_2 && !(frag_cnt & 0x01) &&
 516             frag_cnt) {
 517                 qp->wqe_ops.iw_set_fragment(wqe, byte_off, NULL,
 518                                             qp->swqe_polarity);
 519                 if (qp->uk_attrs->hw_rev == IRDMA_GEN_2)
 520                         ++addl_frag_cnt;
 521         }
 522
 523         set_64bit_val(wqe, 16,
 524                       FIELD_PREP(IRDMAQPSQ_DESTQKEY, op_info->qkey) |
 525                       FIELD_PREP(IRDMAQPSQ_DESTQPN, op_info->dest_qp));
 526         hdr = FIELD_PREP(IRDMAQPSQ_REMSTAG, info->stag_to_inv) |
 527               FIELD_PREP(IRDMAQPSQ_AHID, op_info->ah_id) |
 528               FIELD_PREP(IRDMAQPSQ_IMMDATAFLAG,
 529                          (info->imm_data_valid ? 1 : 0)) |
 530               FIELD_PREP(IRDMAQPSQ_REPORTRTT, (info->report_rtt ? 1 : 0)) |
 531               FIELD_PREP(IRDMAQPSQ_OPCODE, info->op_type) |
 532               FIELD_PREP(IRDMAQPSQ_ADDFRAGCNT, addl_frag_cnt) |
 533               FIELD_PREP(IRDMAQPSQ_PUSHWQE, info->push_wqe) |
 534               FIELD_PREP(IRDMAQPSQ_READFENCE, read_fence) |
 535               FIELD_PREP(IRDMAQPSQ_LOCALFENCE, info->local_fence) |
 536               FIELD_PREP(IRDMAQPSQ_SIGCOMPL, info->signaled) |
 537               FIELD_PREP(IRDMAQPSQ_UDPHEADER, info->udp_hdr) |
 538               FIELD_PREP(IRDMAQPSQ_L4LEN, info->l4len) |
 539               FIELD_PREP(IRDMAQPSQ_VALID, qp->swqe_polarity);
 540
 541         dma_wmb(); /* make sure WQE is populated before valid bit is set */
 542
 543         set_64bit_val(wqe, 24, hdr);
 544         if (info->push_wqe) {
 545                 irdma_qp_push_wqe(qp, wqe, quanta, wqe_idx, post_sq);
 546         } else {
 547                 if (post_sq)
 548                         irdma_uk_qp_post_wr(qp);
 549         }
 550
 551         return 0;
 552 }
 553
 554 /**
 555  * irdma_set_mw_bind_wqe_gen_1 - set mw bind wqe
 556  * @wqe: wqe for setting fragment
 557  * @op_info: info for setting bind wqe values
 558  */
 559 static void irdma_set_mw_bind_wqe_gen_1(__le64 *wqe,
 560                                         struct irdma_bind_window *op_info)
 561 {
 562         set_64bit_val(wqe, 0, (uintptr_t)op_info->va);
 563         set_64bit_val(wqe, 8,
 564                       FIELD_PREP(IRDMAQPSQ_PARENTMRSTAG, op_info->mw_stag) |
 565                       FIELD_PREP(IRDMAQPSQ_MWSTAG, op_info->mr_stag));
 566         set_64bit_val(wqe, 16, op_info->bind_len);
 567 }
 568
 569 /**
 570  * irdma_copy_inline_data_gen_1 - Copy inline data to wqe
 571  * @wqe: pointer to wqe
 572  * @sge_list: table of pointers to inline data
 573  * @num_sges: Total inline data length
 574  * @polarity: compatibility parameter
 575  */
 576 static void irdma_copy_inline_data_gen_1(u8 *wqe, struct ib_sge *sge_list,
 577                                          u32 num_sges, u8 polarity)
 578 {
 579         u32 quanta_bytes_remaining = 16;
 580         int i;
 581
 582         for (i = 0; i < num_sges; i++) {
 583                 u8 *cur_sge = (u8 *)(uintptr_t)sge_list[i].addr;
 584                 u32 sge_len = sge_list[i].length;
 585
 586                 while (sge_len) {
 587                         u32 bytes_copied;
 588
 589                         bytes_copied = min(sge_len, quanta_bytes_remaining);
 590                         memcpy(wqe, cur_sge, bytes_copied);
 591                         wqe += bytes_copied;
 592                         cur_sge += bytes_copied;
 593                         quanta_bytes_remaining -= bytes_copied;
 594                         sge_len -= bytes_copied;
 595
 596                         if (!quanta_bytes_remaining) {
 597                                 /* Remaining inline bytes reside after hdr */
 598                                 wqe += 16;
 599                                 quanta_bytes_remaining = 32;
 600                         }
 601                 }
 602         }
 603 }
 604
 605 /**
 606  * irdma_inline_data_size_to_quanta_gen_1 - based on inline data, quanta
 607  * @data_size: data size for inline
 608  *
 609  * Gets the quanta based on inline and immediate data.
 610  */
 611 static inline u16 irdma_inline_data_size_to_quanta_gen_1(u32 data_size)
 612 {
 613         return data_size <= 16 ? IRDMA_QP_WQE_MIN_QUANTA : 2;
 614 }
 615
 616 /**
 617  * irdma_set_mw_bind_wqe - set mw bind in wqe
 618  * @wqe: wqe for setting mw bind
 619  * @op_info: info for setting wqe values
 620  */
 621 static void irdma_set_mw_bind_wqe(__le64 *wqe,
 622                                   struct irdma_bind_window *op_info)
 623 {
 624         set_64bit_val(wqe, 0, (uintptr_t)op_info->va);
 625         set_64bit_val(wqe, 8,
 626                       FIELD_PREP(IRDMAQPSQ_PARENTMRSTAG, op_info->mr_stag) |
 627                       FIELD_PREP(IRDMAQPSQ_MWSTAG, op_info->mw_stag));
 628         set_64bit_val(wqe, 16, op_info->bind_len);
 629 }
 630
 631 /**
 632  * irdma_copy_inline_data - Copy inline data to wqe
 633  * @wqe: pointer to wqe
 634  * @sge_list: table of pointers to inline data
 635  * @num_sges: number of SGE's
 636  * @polarity: polarity of wqe valid bit
 637  */
 638 static void irdma_copy_inline_data(u8 *wqe, struct ib_sge *sge_list,
 639                                    u32 num_sges, u8 polarity)
 640 {
 641         u8 inline_valid = polarity << IRDMA_INLINE_VALID_S;
 642         u32 quanta_bytes_remaining = 8;
 643         bool first_quanta = true;
 644         int i;
 645
 646         wqe += 8;
 647
 648         for (i = 0; i < num_sges; i++) {
 649                 u8 *cur_sge = (u8 *)(uintptr_t)sge_list[i].addr;
 650                 u32 sge_len = sge_list[i].length;
 651
 652                 while (sge_len) {
 653                         u32 bytes_copied;
 654
 655                         bytes_copied = min(sge_len, quanta_bytes_remaining);
 656                         memcpy(wqe, cur_sge, bytes_copied);
 657                         wqe += bytes_copied;
 658                         cur_sge += bytes_copied;
 659                         quanta_bytes_remaining -= bytes_copied;
 660                         sge_len -= bytes_copied;
 661
 662                         if (!quanta_bytes_remaining) {
 663                                 quanta_bytes_remaining = 31;
 664
 665                                 /* Remaining inline bytes reside after hdr */
 666                                 if (first_quanta) {
 667                                         first_quanta = false;
 668                                         wqe += 16;
 669                                 } else {
 670                                         *wqe = inline_valid;
 671                                         wqe++;
 672                                 }
 673                         }
 674                 }
 675         }
 676         if (!first_quanta && quanta_bytes_remaining < 31)
 677                 *(wqe + quanta_bytes_remaining) = inline_valid;
 678 }
 679
 680 /**
 681  * irdma_inline_data_size_to_quanta - based on inline data, quanta
 682  * @data_size: data size for inline
 683  *
 684  * Gets the quanta based on inline and immediate data.
 685  */
 686 static u16 irdma_inline_data_size_to_quanta(u32 data_size)
 687 {
 688         if (data_size <= 8)
 689                 return IRDMA_QP_WQE_MIN_QUANTA;
 690         else if (data_size <= 39)
 691                 return 2;
 692         else if (data_size <= 70)
 693                 return 3;
 694         else if (data_size <= 101)
 695                 return 4;
 696         else if (data_size <= 132)
 697                 return 5;
 698         else if (data_size <= 163)
 699                 return 6;
 700         else if (data_size <= 194)
 701                 return 7;
 702         else
 703                 return 8;
 704 }
 705
 706 /**
 707  * irdma_uk_inline_rdma_write - inline rdma write operation
 708  * @qp: hw qp ptr
 709  * @info: post sq information
 710  * @post_sq: flag to post sq
 711  */
 712 int irdma_uk_inline_rdma_write(struct irdma_qp_uk *qp,
 713                                struct irdma_post_sq_info *info, bool post_sq)
 714 {
 715         __le64 *wqe;
 716         struct irdma_rdma_write *op_info;
 717         u64 hdr = 0;
 718         u32 wqe_idx;
 719         bool read_fence = false;
 720         u32 i, total_size = 0;
 721         u16 quanta;
 722
 723         info->push_wqe = qp->push_db ? true : false;
 724         op_info = &info->op.rdma_write;
 725
 726         if (unlikely(qp->max_sq_frag_cnt < op_info->num_lo_sges))
 727                 return -EINVAL;
 728
 729         for (i = 0; i < op_info->num_lo_sges; i++)
 730                 total_size += op_info->lo_sg_list[i].length;
 731
 732         if (unlikely(total_size > qp->max_inline_data))
 733                 return -EINVAL;
 734
 735         quanta = qp->wqe_ops.iw_inline_data_size_to_quanta(total_size);
 736         wqe = irdma_qp_get_next_send_wqe(qp, &wqe_idx, quanta, total_size,
 737                                          info);
 738         if (!wqe)
 739                 return -ENOMEM;
 740
 741         irdma_clr_wqes(qp, wqe_idx);
 742
 743         read_fence |= info->read_fence;
 744         set_64bit_val(wqe, 16,
 745                       FIELD_PREP(IRDMAQPSQ_FRAG_TO, op_info->rem_addr.addr));
 746
 747         hdr = FIELD_PREP(IRDMAQPSQ_REMSTAG, op_info->rem_addr.lkey) |
 748               FIELD_PREP(IRDMAQPSQ_OPCODE, info->op_type) |
 749               FIELD_PREP(IRDMAQPSQ_INLINEDATALEN, total_size) |
 750               FIELD_PREP(IRDMAQPSQ_REPORTRTT, info->report_rtt ? 1 : 0) |
 751               FIELD_PREP(IRDMAQPSQ_INLINEDATAFLAG, 1) |
 752               FIELD_PREP(IRDMAQPSQ_IMMDATAFLAG, info->imm_data_valid ? 1 : 0) |
 753               FIELD_PREP(IRDMAQPSQ_PUSHWQE, info->push_wqe ? 1 : 0) |
 754               FIELD_PREP(IRDMAQPSQ_READFENCE, read_fence) |
 755               FIELD_PREP(IRDMAQPSQ_LOCALFENCE, info->local_fence) |
 756               FIELD_PREP(IRDMAQPSQ_SIGCOMPL, info->signaled) |
 757               FIELD_PREP(IRDMAQPSQ_VALID, qp->swqe_polarity);
 758
 759         if (info->imm_data_valid)
 760                 set_64bit_val(wqe, 0,
 761                               FIELD_PREP(IRDMAQPSQ_IMMDATA, info->imm_data));
 762
 763         qp->wqe_ops.iw_copy_inline_data((u8 *)wqe, op_info->lo_sg_list,
 764                                         op_info->num_lo_sges,
 765                                         qp->swqe_polarity);
 766         dma_wmb(); /* make sure WQE is populated before valid bit is set */
 767
 768         set_64bit_val(wqe, 24, hdr);
 769
 770         if (info->push_wqe) {
 771                 irdma_qp_push_wqe(qp, wqe, quanta, wqe_idx, post_sq);
 772         } else {
 773                 if (post_sq)
 774                         irdma_uk_qp_post_wr(qp);
 775         }
 776
 777         return 0;
 778 }
 779
 780 /**
 781  * irdma_uk_inline_send - inline send operation
 782  * @qp: hw qp ptr
 783  * @info: post sq information
 784  * @post_sq: flag to post sq
 785  */
 786 int irdma_uk_inline_send(struct irdma_qp_uk *qp,
 787                          struct irdma_post_sq_info *info, bool post_sq)
 788 {
 789         __le64 *wqe;
 790         struct irdma_post_send *op_info;
 791         u64 hdr;
 792         u32 wqe_idx;
 793         bool read_fence = false;
 794         u32 i, total_size = 0;
 795         u16 quanta;
 796
 797         info->push_wqe = qp->push_db ? true : false;
 798         op_info = &info->op.send;
 799
 800         if (unlikely(qp->max_sq_frag_cnt < op_info->num_sges))
 801                 return -EINVAL;
 802
 803         for (i = 0; i < op_info->num_sges; i++)
 804                 total_size += op_info->sg_list[i].length;
 805
 806         if (unlikely(total_size > qp->max_inline_data))
 807                 return -EINVAL;
 808
 809         quanta = qp->wqe_ops.iw_inline_data_size_to_quanta(total_size);
 810         wqe = irdma_qp_get_next_send_wqe(qp, &wqe_idx, quanta, total_size,
 811                                          info);
 812         if (!wqe)
 813                 return -ENOMEM;
 814
 815         irdma_clr_wqes(qp, wqe_idx);
 816
 817         set_64bit_val(wqe, 16,
 818                       FIELD_PREP(IRDMAQPSQ_DESTQKEY, op_info->qkey) |
 819                       FIELD_PREP(IRDMAQPSQ_DESTQPN, op_info->dest_qp));
 820
 821         read_fence |= info->read_fence;
 822         hdr = FIELD_PREP(IRDMAQPSQ_REMSTAG, info->stag_to_inv) |
 823               FIELD_PREP(IRDMAQPSQ_AHID, op_info->ah_id) |
 824               FIELD_PREP(IRDMAQPSQ_OPCODE, info->op_type) |
 825               FIELD_PREP(IRDMAQPSQ_INLINEDATALEN, total_size) |
 826               FIELD_PREP(IRDMAQPSQ_IMMDATAFLAG,
 827                          (info->imm_data_valid ? 1 : 0)) |
 828               FIELD_PREP(IRDMAQPSQ_REPORTRTT, (info->report_rtt ? 1 : 0)) |
 829               FIELD_PREP(IRDMAQPSQ_INLINEDATAFLAG, 1) |
 830               FIELD_PREP(IRDMAQPSQ_PUSHWQE, info->push_wqe) |
 831               FIELD_PREP(IRDMAQPSQ_READFENCE, read_fence) |
 832               FIELD_PREP(IRDMAQPSQ_LOCALFENCE, info->local_fence) |
 833               FIELD_PREP(IRDMAQPSQ_SIGCOMPL, info->signaled) |
 834               FIELD_PREP(IRDMAQPSQ_UDPHEADER, info->udp_hdr) |
 835               FIELD_PREP(IRDMAQPSQ_L4LEN, info->l4len) |
 836               FIELD_PREP(IRDMAQPSQ_VALID, qp->swqe_polarity);
 837
 838         if (info->imm_data_valid)
 839                 set_64bit_val(wqe, 0,
 840                               FIELD_PREP(IRDMAQPSQ_IMMDATA, info->imm_data));
 841         qp->wqe_ops.iw_copy_inline_data((u8 *)wqe, op_info->sg_list,
 842                                         op_info->num_sges, qp->swqe_polarity);
 843
 844         dma_wmb(); /* make sure WQE is populated before valid bit is set */
 845
 846         set_64bit_val(wqe, 24, hdr);
 847
 848         if (info->push_wqe) {
 849                 irdma_qp_push_wqe(qp, wqe, quanta, wqe_idx, post_sq);
 850         } else {
 851                 if (post_sq)
 852                         irdma_uk_qp_post_wr(qp);
 853         }
 854
 855         return 0;
 856 }
 857
 858 /**
 859  * irdma_uk_stag_local_invalidate - stag invalidate operation
 860  * @qp: hw qp ptr
 861  * @info: post sq information
 862  * @post_sq: flag to post sq
 863  */
 864 int irdma_uk_stag_local_invalidate(struct irdma_qp_uk *qp,
 865                                    struct irdma_post_sq_info *info,
 866                                    bool post_sq)
 867 {
 868         __le64 *wqe;
 869         struct irdma_inv_local_stag *op_info;
 870         u64 hdr;
 871         u32 wqe_idx;
 872         bool local_fence = false;
 873         struct ib_sge sge = {};
 874
 875         info->push_wqe = qp->push_db ? true : false;
 876         op_info = &info->op.inv_local_stag;
 877         local_fence = info->local_fence;
 878
 879         wqe = irdma_qp_get_next_send_wqe(qp, &wqe_idx, IRDMA_QP_WQE_MIN_QUANTA,
 880                                          0, info);
 881         if (!wqe)
 882                 return -ENOMEM;
 883
 884         irdma_clr_wqes(qp, wqe_idx);
 885
 886         sge.lkey = op_info->target_stag;
 887         qp->wqe_ops.iw_set_fragment(wqe, 0, &sge, 0);
 888
 889         set_64bit_val(wqe, 16, 0);
 890
 891         hdr = FIELD_PREP(IRDMAQPSQ_OPCODE, IRDMA_OP_TYPE_INV_STAG) |
 892               FIELD_PREP(IRDMAQPSQ_PUSHWQE, info->push_wqe) |
 893               FIELD_PREP(IRDMAQPSQ_READFENCE, info->read_fence) |
 894               FIELD_PREP(IRDMAQPSQ_LOCALFENCE, local_fence) |
 895               FIELD_PREP(IRDMAQPSQ_SIGCOMPL, info->signaled) |
 896               FIELD_PREP(IRDMAQPSQ_VALID, qp->swqe_polarity);
 897
 898         dma_wmb(); /* make sure WQE is populated before valid bit is set */
 899
 900         set_64bit_val(wqe, 24, hdr);
 901
 902         if (info->push_wqe) {
 903                 irdma_qp_push_wqe(qp, wqe, IRDMA_QP_WQE_MIN_QUANTA, wqe_idx,
 904                                   post_sq);
 905         } else {
 906                 if (post_sq)
 907                         irdma_uk_qp_post_wr(qp);
 908         }
 909
 910         return 0;
 911 }
 912
 913 /**
 914  * irdma_uk_post_receive - post receive wqe
 915  * @qp: hw qp ptr
 916  * @info: post rq information
 917  */
 918 int irdma_uk_post_receive(struct irdma_qp_uk *qp,
 919                           struct irdma_post_rq_info *info)
 920 {
 921         u32 wqe_idx, i, byte_off;
 922         u32 addl_frag_cnt;
 923         __le64 *wqe;
 924         u64 hdr;
 925
 926         if (qp->max_rq_frag_cnt < info->num_sges)
 927                 return -EINVAL;
 928
 929         wqe = irdma_qp_get_next_recv_wqe(qp, &wqe_idx);
 930         if (!wqe)
 931                 return -ENOMEM;
 932
 933         qp->rq_wrid_array[wqe_idx] = info->wr_id;
 934         addl_frag_cnt = info->num_sges > 1 ? (info->num_sges - 1) : 0;
 935         qp->wqe_ops.iw_set_fragment(wqe, 0, info->sg_list,
 936                                     qp->rwqe_polarity);
 937
 938         for (i = 1, byte_off = 32; i < info->num_sges; i++) {
 939                 qp->wqe_ops.iw_set_fragment(wqe, byte_off, &info->sg_list[i],
 940                                             qp->rwqe_polarity);
 941                 byte_off += 16;
 942         }
 943
 944         /* if not an odd number set valid bit in next fragment */
 945         if (qp->uk_attrs->hw_rev >= IRDMA_GEN_2 && !(info->num_sges & 0x01) &&
 946             info->num_sges) {
 947                 qp->wqe_ops.iw_set_fragment(wqe, byte_off, NULL,
 948                                             qp->rwqe_polarity);
 949                 if (qp->uk_attrs->hw_rev == IRDMA_GEN_2)
 950                         ++addl_frag_cnt;
 951         }
 952
 953         set_64bit_val(wqe, 16, 0);
 954         hdr = FIELD_PREP(IRDMAQPSQ_ADDFRAGCNT, addl_frag_cnt) |
 955               FIELD_PREP(IRDMAQPSQ_VALID, qp->rwqe_polarity);
 956
 957         dma_wmb(); /* make sure WQE is populated before valid bit is set */
 958
 959         set_64bit_val(wqe, 24, hdr);
 960
 961         return 0;
 962 }
 963
 964 /**
 965  * irdma_uk_cq_resize - reset the cq buffer info
 966  * @cq: cq to resize
 967  * @cq_base: new cq buffer addr
 968  * @cq_size: number of cqes
 969  */
 970 void irdma_uk_cq_resize(struct irdma_cq_uk *cq, void *cq_base, int cq_size)
 971 {
 972         cq->cq_base = cq_base;
 973         cq->cq_size = cq_size;
 974         IRDMA_RING_INIT(cq->cq_ring, cq->cq_size);
 975         cq->polarity = 1;
 976 }
 977
 978 /**
 979  * irdma_uk_cq_set_resized_cnt - record the count of the resized buffers
 980  * @cq: cq to resize
 981  * @cq_cnt: the count of the resized cq buffers
 982  */
 983 void irdma_uk_cq_set_resized_cnt(struct irdma_cq_uk *cq, u16 cq_cnt)
 984 {
 985         u64 temp_val;
 986         u16 sw_cq_sel;
 987         u8 arm_next_se;
 988         u8 arm_next;
 989         u8 arm_seq_num;
 990
 991         get_64bit_val(cq->shadow_area, 32, &temp_val);
 992
 993         sw_cq_sel = (u16)FIELD_GET(IRDMA_CQ_DBSA_SW_CQ_SELECT, temp_val);
 994         sw_cq_sel += cq_cnt;
 995
 996         arm_seq_num = (u8)FIELD_GET(IRDMA_CQ_DBSA_ARM_SEQ_NUM, temp_val);
 997         arm_next_se = (u8)FIELD_GET(IRDMA_CQ_DBSA_ARM_NEXT_SE, temp_val);
 998         arm_next = (u8)FIELD_GET(IRDMA_CQ_DBSA_ARM_NEXT, temp_val);
 999
1000         temp_val = FIELD_PREP(IRDMA_CQ_DBSA_ARM_SEQ_NUM, arm_seq_num) |
1001                    FIELD_PREP(IRDMA_CQ_DBSA_SW_CQ_SELECT, sw_cq_sel) |
1002                    FIELD_PREP(IRDMA_CQ_DBSA_ARM_NEXT_SE, arm_next_se) |
1003                    FIELD_PREP(IRDMA_CQ_DBSA_ARM_NEXT, arm_next);
1004
1005         set_64bit_val(cq->shadow_area, 32, temp_val);
1006 }
1007
1008 /**
1009  * irdma_uk_cq_request_notification - cq notification request (door bell)
1010  * @cq: hw cq
1011  * @cq_notify: notification type
1012  */
1013 void irdma_uk_cq_request_notification(struct irdma_cq_uk *cq,
1014                                       enum irdma_cmpl_notify cq_notify)
1015 {
1016         u64 temp_val;
1017         u16 sw_cq_sel;
1018         u8 arm_next_se = 0;
1019         u8 arm_next = 0;
1020         u8 arm_seq_num;
1021
1022         get_64bit_val(cq->shadow_area, 32, &temp_val);
1023         arm_seq_num = (u8)FIELD_GET(IRDMA_CQ_DBSA_ARM_SEQ_NUM, temp_val);
1024         arm_seq_num++;
1025         sw_cq_sel = (u16)FIELD_GET(IRDMA_CQ_DBSA_SW_CQ_SELECT, temp_val);
1026         arm_next_se = (u8)FIELD_GET(IRDMA_CQ_DBSA_ARM_NEXT_SE, temp_val);
1027         arm_next_se |= 1;
1028         if (cq_notify == IRDMA_CQ_COMPL_EVENT)
1029                 arm_next = 1;
1030         temp_val = FIELD_PREP(IRDMA_CQ_DBSA_ARM_SEQ_NUM, arm_seq_num) |
1031                    FIELD_PREP(IRDMA_CQ_DBSA_SW_CQ_SELECT, sw_cq_sel) |
1032                    FIELD_PREP(IRDMA_CQ_DBSA_ARM_NEXT_SE, arm_next_se) |
1033                    FIELD_PREP(IRDMA_CQ_DBSA_ARM_NEXT, arm_next);
1034
1035         set_64bit_val(cq->shadow_area, 32, temp_val);
1036
1037         dma_wmb(); /* make sure WQE is populated before valid bit is set */
1038
1039         writel(cq->cq_id, cq->cqe_alloc_db);
1040 }
1041
1042 /**
1043  * irdma_uk_cq_poll_cmpl - get cq completion info
1044  * @cq: hw cq
1045  * @info: cq poll information returned
1046  */
1047 int irdma_uk_cq_poll_cmpl(struct irdma_cq_uk *cq,
1048                           struct irdma_cq_poll_info *info)
1049 {
1050         u64 comp_ctx, qword0, qword2, qword3;
1051         __le64 *cqe;
1052         struct irdma_qp_uk *qp;
1053         struct irdma_ring *pring = NULL;
1054         u32 wqe_idx;
1055         int ret_code;
1056         bool move_cq_head = true;
1057         u8 polarity;
1058         bool ext_valid;
1059         __le64 *ext_cqe;
1060
1061         if (cq->avoid_mem_cflct)
1062                 cqe = IRDMA_GET_CURRENT_EXTENDED_CQ_ELEM(cq);
1063         else
1064                 cqe = IRDMA_GET_CURRENT_CQ_ELEM(cq);
1065
1066         get_64bit_val(cqe, 24, &qword3);
1067         polarity = (u8)FIELD_GET(IRDMA_CQ_VALID, qword3);
1068         if (polarity != cq->polarity)
1069                 return -ENOENT;
1070
1071         /* Ensure CQE contents are read after valid bit is checked */
1072         dma_rmb();
1073
1074         ext_valid = (bool)FIELD_GET(IRDMA_CQ_EXTCQE, qword3);
1075         if (ext_valid) {
1076                 u64 qword6, qword7;
1077                 u32 peek_head;
1078
1079                 if (cq->avoid_mem_cflct) {
1080                         ext_cqe = (__le64 *)((u8 *)cqe + 32);
1081                         get_64bit_val(ext_cqe, 24, &qword7);
1082                         polarity = (u8)FIELD_GET(IRDMA_CQ_VALID, qword7);
1083                 } else {
1084                         peek_head = (cq->cq_ring.head + 1) % cq->cq_ring.size;
1085                         ext_cqe = cq->cq_base[peek_head].buf;
1086                         get_64bit_val(ext_cqe, 24, &qword7);
1087                         polarity = (u8)FIELD_GET(IRDMA_CQ_VALID, qword7);
1088                         if (!peek_head)
1089                                 polarity ^= 1;
1090                 }
1091                 if (polarity != cq->polarity)
1092                         return -ENOENT;
1093
1094                 /* Ensure ext CQE contents are read after ext valid bit is checked */
1095                 dma_rmb();
1096
1097                 info->imm_valid = (bool)FIELD_GET(IRDMA_CQ_IMMVALID, qword7);
1098                 if (info->imm_valid) {
1099                         u64 qword4;
1100
1101                         get_64bit_val(ext_cqe, 0, &qword4);
1102                         info->imm_data = (u32)FIELD_GET(IRDMA_CQ_IMMDATALOW32, qword4);
1103                 }
1104                 info->ud_smac_valid = (bool)FIELD_GET(IRDMA_CQ_UDSMACVALID, qword7);
1105                 info->ud_vlan_valid = (bool)FIELD_GET(IRDMA_CQ_UDVLANVALID, qword7);
1106                 if (info->ud_smac_valid || info->ud_vlan_valid) {
1107                         get_64bit_val(ext_cqe, 16, &qword6);
1108                         if (info->ud_vlan_valid)
1109                                 info->ud_vlan = (u16)FIELD_GET(IRDMA_CQ_UDVLAN, qword6);
1110                         if (info->ud_smac_valid) {
1111                                 info->ud_smac[5] = qword6 & 0xFF;
1112                                 info->ud_smac[4] = (qword6 >> 8) & 0xFF;
1113                                 info->ud_smac[3] = (qword6 >> 16) & 0xFF;
1114                                 info->ud_smac[2] = (qword6 >> 24) & 0xFF;
1115                                 info->ud_smac[1] = (qword6 >> 32) & 0xFF;
1116                                 info->ud_smac[0] = (qword6 >> 40) & 0xFF;
1117                         }
1118                 }
1119         } else {
1120                 info->imm_valid = false;
1121                 info->ud_smac_valid = false;
1122                 info->ud_vlan_valid = false;
1123         }
1124
1125         info->q_type = (u8)FIELD_GET(IRDMA_CQ_SQ, qword3);
1126         info->error = (bool)FIELD_GET(IRDMA_CQ_ERROR, qword3);
1127         info->push_dropped = (bool)FIELD_GET(IRDMACQ_PSHDROP, qword3);
1128         info->ipv4 = (bool)FIELD_GET(IRDMACQ_IPV4, qword3);
1129         if (info->error) {
1130                 info->major_err = FIELD_GET(IRDMA_CQ_MAJERR, qword3);
1131                 info->minor_err = FIELD_GET(IRDMA_CQ_MINERR, qword3);
1132                 if (info->major_err == IRDMA_FLUSH_MAJOR_ERR) {
1133                         info->comp_status = IRDMA_COMPL_STATUS_FLUSHED;
1134                         /* Set the min error to standard flush error code for remaining cqes */
1135                         if (info->minor_err != FLUSH_GENERAL_ERR) {
1136                                 qword3 &= ~IRDMA_CQ_MINERR;
1137                                 qword3 |= FIELD_PREP(IRDMA_CQ_MINERR, FLUSH_GENERAL_ERR);
1138                                 set_64bit_val(cqe, 24, qword3);
1139                         }
1140                 } else {
1141                         info->comp_status = IRDMA_COMPL_STATUS_UNKNOWN;
1142                 }
1143         } else {
1144                 info->comp_status = IRDMA_COMPL_STATUS_SUCCESS;
1145         }
1146
1147         get_64bit_val(cqe, 0, &qword0);
1148         get_64bit_val(cqe, 16, &qword2);
1149
1150         info->tcp_seq_num_rtt = (u32)FIELD_GET(IRDMACQ_TCPSEQNUMRTT, qword0);
1151         info->qp_id = (u32)FIELD_GET(IRDMACQ_QPID, qword2);
1152         info->ud_src_qpn = (u32)FIELD_GET(IRDMACQ_UDSRCQPN, qword2);
1153
1154         get_64bit_val(cqe, 8, &comp_ctx);
1155
1156         info->solicited_event = (bool)FIELD_GET(IRDMACQ_SOEVENT, qword3);
1157         qp = (struct irdma_qp_uk *)(unsigned long)comp_ctx;
1158         if (!qp || qp->destroy_pending) {
1159                 ret_code = -EFAULT;
1160                 goto exit;
1161         }
1162         wqe_idx = (u32)FIELD_GET(IRDMA_CQ_WQEIDX, qword3);
1163         info->qp_handle = (irdma_qp_handle)(unsigned long)qp;
1164         info->op_type = (u8)FIELD_GET(IRDMA_CQ_SQ, qword3);
1165
1166         if (info->q_type == IRDMA_CQE_QTYPE_RQ) {
1167                 u32 array_idx;
1168
1169                 array_idx = wqe_idx / qp->rq_wqe_size_multiplier;
1170
1171                 if (info->comp_status == IRDMA_COMPL_STATUS_FLUSHED ||
1172                     info->comp_status == IRDMA_COMPL_STATUS_UNKNOWN) {
1173                         if (!IRDMA_RING_MORE_WORK(qp->rq_ring)) {
1174                                 ret_code = -ENOENT;
1175                                 goto exit;
1176                         }
1177
1178                         info->wr_id = qp->rq_wrid_array[qp->rq_ring.tail];
1179                         array_idx = qp->rq_ring.tail;
1180                 } else {
1181                         info->wr_id = qp->rq_wrid_array[array_idx];
1182                 }
1183
1184                 info->bytes_xfered = (u32)FIELD_GET(IRDMACQ_PAYLDLEN, qword0);
1185
1186                 if (qword3 & IRDMACQ_STAG) {
1187                         info->stag_invalid_set = true;
1188                         info->inv_stag = (u32)FIELD_GET(IRDMACQ_INVSTAG, qword2);
1189                 } else {
1190                         info->stag_invalid_set = false;
1191                 }
1192                 IRDMA_RING_SET_TAIL(qp->rq_ring, array_idx + 1);
1193                 if (info->comp_status == IRDMA_COMPL_STATUS_FLUSHED) {
1194                         qp->rq_flush_seen = true;
1195                         if (!IRDMA_RING_MORE_WORK(qp->rq_ring))
1196                                 qp->rq_flush_complete = true;
1197                         else
1198                                 move_cq_head = false;
1199                 }
1200                 pring = &qp->rq_ring;
1201         } else { /* q_type is IRDMA_CQE_QTYPE_SQ */
1202                 if (qp->first_sq_wq) {
1203                         if (wqe_idx + 1 >= qp->conn_wqes)
1204                                 qp->first_sq_wq = false;
1205
1206                         if (wqe_idx < qp->conn_wqes && qp->sq_ring.head == qp->sq_ring.tail) {
1207                                 IRDMA_RING_MOVE_HEAD_NOCHECK(cq->cq_ring);
1208                                 IRDMA_RING_MOVE_TAIL(cq->cq_ring);
1209                                 set_64bit_val(cq->shadow_area, 0,
1210                                               IRDMA_RING_CURRENT_HEAD(cq->cq_ring));
1211                                 memset(info, 0,
1212                                        sizeof(struct irdma_cq_poll_info));
1213                                 return irdma_uk_cq_poll_cmpl(cq, info);
1214                         }
1215                 }
1216                 /*cease posting push mode on push drop*/
1217                 if (info->push_dropped) {
1218                         qp->push_mode = false;
1219                         qp->push_dropped = true;
1220                 }
1221                 if (info->comp_status != IRDMA_COMPL_STATUS_FLUSHED) {
1222                         info->wr_id = qp->sq_wrtrk_array[wqe_idx].wrid;
1223                         if (!info->comp_status)
1224                                 info->bytes_xfered = qp->sq_wrtrk_array[wqe_idx].wr_len;
1225                         info->op_type = (u8)FIELD_GET(IRDMACQ_OP, qword3);
1226                         IRDMA_RING_SET_TAIL(qp->sq_ring,
1227                                             wqe_idx + qp->sq_wrtrk_array[wqe_idx].quanta);
1228                 } else {
1229                         if (!IRDMA_RING_MORE_WORK(qp->sq_ring)) {
1230                                 ret_code = -ENOENT;
1231                                 goto exit;
1232                         }
1233
1234                         do {
1235                                 __le64 *sw_wqe;
1236                                 u64 wqe_qword;
1237                                 u32 tail;
1238
1239                                 tail = qp->sq_ring.tail;
1240                                 sw_wqe = qp->sq_base[tail].elem;
1241                                 get_64bit_val(sw_wqe, 24,
1242                                               &wqe_qword);
1243                                 info->op_type = (u8)FIELD_GET(IRDMAQPSQ_OPCODE,
1244                                                               wqe_qword);
1245                                 IRDMA_RING_SET_TAIL(qp->sq_ring,
1246                                                     tail + qp->sq_wrtrk_array[tail].quanta);
1247                                 if (info->op_type != IRDMAQP_OP_NOP) {
1248                                         info->wr_id = qp->sq_wrtrk_array[tail].wrid;
1249                                         info->bytes_xfered = qp->sq_wrtrk_array[tail].wr_len;
1250                                         break;
1251                                 }
1252                         } while (1);
1253                         if (info->op_type == IRDMA_OP_TYPE_BIND_MW &&
1254                             info->minor_err == FLUSH_PROT_ERR)
1255                                 info->minor_err = FLUSH_MW_BIND_ERR;
1256                         qp->sq_flush_seen = true;
1257                         if (!IRDMA_RING_MORE_WORK(qp->sq_ring))
1258                                 qp->sq_flush_complete = true;
1259                 }
1260                 pring = &qp->sq_ring;
1261         }
1262
1263         ret_code = 0;
1264
1265 exit:
1266         if (!ret_code && info->comp_status == IRDMA_COMPL_STATUS_FLUSHED)
1267                 if (pring && IRDMA_RING_MORE_WORK(*pring))
1268                         move_cq_head = false;
1269
1270         if (move_cq_head) {
1271                 IRDMA_RING_MOVE_HEAD_NOCHECK(cq->cq_ring);
1272                 if (!IRDMA_RING_CURRENT_HEAD(cq->cq_ring))
1273                         cq->polarity ^= 1;
1274
1275                 if (ext_valid && !cq->avoid_mem_cflct) {
1276                         IRDMA_RING_MOVE_HEAD_NOCHECK(cq->cq_ring);
1277                         if (!IRDMA_RING_CURRENT_HEAD(cq->cq_ring))
1278                                 cq->polarity ^= 1;
1279                 }
1280
1281                 IRDMA_RING_MOVE_TAIL(cq->cq_ring);
1282                 if (!cq->avoid_mem_cflct && ext_valid)
1283                         IRDMA_RING_MOVE_TAIL(cq->cq_ring);
1284                 set_64bit_val(cq->shadow_area, 0,
1285                               IRDMA_RING_CURRENT_HEAD(cq->cq_ring));
1286         } else {
1287                 qword3 &= ~IRDMA_CQ_WQEIDX;
1288                 qword3 |= FIELD_PREP(IRDMA_CQ_WQEIDX, pring->tail);
1289                 set_64bit_val(cqe, 24, qword3);
1290         }
1291
1292         return ret_code;
1293 }
1294
1295 /**
1296  * irdma_qp_round_up - return round up qp wq depth
1297  * @wqdepth: wq depth in quanta to round up
1298  */
1299 static int irdma_qp_round_up(u32 wqdepth)
1300 {
1301         int scount = 1;
1302
1303         for (wqdepth--; scount <= 16; scount *= 2)
1304                 wqdepth |= wqdepth >> scount;
1305
1306         return ++wqdepth;
1307 }
1308
1309 /**
1310  * irdma_get_wqe_shift - get shift count for maximum wqe size
1311  * @uk_attrs: qp HW attributes
1312  * @sge: Maximum Scatter Gather Elements wqe
1313  * @inline_data: Maximum inline data size
1314  * @shift: Returns the shift needed based on sge
1315  *
1316  * Shift can be used to left shift the wqe size based on number of SGEs and inlind data size.
1317  * For 1 SGE or inline data <= 8, shift = 0 (wqe size of 32
1318  * bytes). For 2 or 3 SGEs or inline data <= 39, shift = 1 (wqe
1319  * size of 64 bytes).
1320  * For 4-7 SGE's and inline <= 101 Shift of 2 otherwise (wqe
1321  * size of 256 bytes).
1322  */
1323 void irdma_get_wqe_shift(struct irdma_uk_attrs *uk_attrs, u32 sge,
1324                          u32 inline_data, u8 *shift)
1325 {
1326         *shift = 0;
1327         if (uk_attrs->hw_rev >= IRDMA_GEN_2) {
1328                 if (sge > 1 || inline_data > 8) {
1329                         if (sge < 4 && inline_data <= 39)
1330                                 *shift = 1;
1331                         else if (sge < 8 && inline_data <= 101)
1332                                 *shift = 2;
1333                         else
1334                                 *shift = 3;
1335                 }
1336         } else if (sge > 1 || inline_data > 16) {
1337                 *shift = (sge < 4 && inline_data <= 48) ? 1 : 2;
1338         }
1339 }
1340
1341 /*
1342  * irdma_get_sqdepth - get SQ depth (quanta)
1343  * @uk_attrs: qp HW attributes
1344  * @sq_size: SQ size
1345  * @shift: shift which determines size of WQE
1346  * @sqdepth: depth of SQ
1347  *
1348  */
1349 int irdma_get_sqdepth(struct irdma_uk_attrs *uk_attrs, u32 sq_size, u8 shift,
1350                       u32 *sqdepth)
1351 {
1352         *sqdepth = irdma_qp_round_up((sq_size << shift) + IRDMA_SQ_RSVD);
1353
1354         if (*sqdepth < (IRDMA_QP_SW_MIN_WQSIZE << shift))
1355                 *sqdepth = IRDMA_QP_SW_MIN_WQSIZE << shift;
1356         else if (*sqdepth > uk_attrs->max_hw_wq_quanta)
1357                 return -EINVAL;
1358
1359         return 0;
1360 }
1361
1362 /*
1363  * irdma_get_rqdepth - get RQ depth (quanta)
1364  * @uk_attrs: qp HW attributes
1365  * @rq_size: RQ size
1366  * @shift: shift which determines size of WQE
1367  * @rqdepth: depth of RQ
1368  */
1369 int irdma_get_rqdepth(struct irdma_uk_attrs *uk_attrs, u32 rq_size, u8 shift,
1370                       u32 *rqdepth)
1371 {
1372         *rqdepth = irdma_qp_round_up((rq_size << shift) + IRDMA_RQ_RSVD);
1373
1374         if (*rqdepth < (IRDMA_QP_SW_MIN_WQSIZE << shift))
1375                 *rqdepth = IRDMA_QP_SW_MIN_WQSIZE << shift;
1376         else if (*rqdepth > uk_attrs->max_hw_rq_quanta)
1377                 return -EINVAL;
1378
1379         return 0;
1380 }
1381
1382 static const struct irdma_wqe_uk_ops iw_wqe_uk_ops = {
1383         .iw_copy_inline_data = irdma_copy_inline_data,
1384         .iw_inline_data_size_to_quanta = irdma_inline_data_size_to_quanta,
1385         .iw_set_fragment = irdma_set_fragment,
1386         .iw_set_mw_bind_wqe = irdma_set_mw_bind_wqe,
1387 };
1388
1389 static const struct irdma_wqe_uk_ops iw_wqe_uk_ops_gen_1 = {
1390         .iw_copy_inline_data = irdma_copy_inline_data_gen_1,
1391         .iw_inline_data_size_to_quanta = irdma_inline_data_size_to_quanta_gen_1,
1392         .iw_set_fragment = irdma_set_fragment_gen_1,
1393         .iw_set_mw_bind_wqe = irdma_set_mw_bind_wqe_gen_1,
1394 };
1395
1396 /**
1397  * irdma_setup_connection_wqes - setup WQEs necessary to complete
1398  * connection.
1399  * @qp: hw qp (user and kernel)
1400  * @info: qp initialization info
1401  */
1402 static void irdma_setup_connection_wqes(struct irdma_qp_uk *qp,
1403                                         struct irdma_qp_uk_init_info *info)
1404 {
1405         u16 move_cnt = 1;
1406
1407         if (!info->legacy_mode &&
1408             (qp->uk_attrs->feature_flags & IRDMA_FEATURE_RTS_AE))
1409                 move_cnt = 3;
1410
1411         qp->conn_wqes = move_cnt;
1412         IRDMA_RING_MOVE_HEAD_BY_COUNT_NOCHECK(qp->sq_ring, move_cnt);
1413         IRDMA_RING_MOVE_TAIL_BY_COUNT(qp->sq_ring, move_cnt);
1414         IRDMA_RING_MOVE_HEAD_BY_COUNT_NOCHECK(qp->initial_ring, move_cnt);
1415 }
1416
1417 /**
1418  * irdma_uk_qp_init - initialize shared qp
1419  * @qp: hw qp (user and kernel)
1420  * @info: qp initialization info
1421  *
1422  * initializes the vars used in both user and kernel mode.
1423  * size of the wqe depends on numbers of max. fragements
1424  * allowed. Then size of wqe * the number of wqes should be the
1425  * amount of memory allocated for sq and rq.
1426  */
1427 int irdma_uk_qp_init(struct irdma_qp_uk *qp, struct irdma_qp_uk_init_info *info)
1428 {
1429         int ret_code = 0;
1430         u32 sq_ring_size;
1431         u8 sqshift, rqshift;
1432
1433         qp->uk_attrs = info->uk_attrs;
1434         if (info->max_sq_frag_cnt > qp->uk_attrs->max_hw_wq_frags ||
1435             info->max_rq_frag_cnt > qp->uk_attrs->max_hw_wq_frags)
1436                 return -EINVAL;
1437
1438         irdma_get_wqe_shift(qp->uk_attrs, info->max_rq_frag_cnt, 0, &rqshift);
1439         if (qp->uk_attrs->hw_rev == IRDMA_GEN_1) {
1440                 irdma_get_wqe_shift(qp->uk_attrs, info->max_sq_frag_cnt,
1441                                     info->max_inline_data, &sqshift);
1442                 if (info->abi_ver > 4)
1443                         rqshift = IRDMA_MAX_RQ_WQE_SHIFT_GEN1;
1444         } else {
1445                 irdma_get_wqe_shift(qp->uk_attrs, info->max_sq_frag_cnt + 1,
1446                                     info->max_inline_data, &sqshift);
1447         }
1448         qp->qp_caps = info->qp_caps;
1449         qp->sq_base = info->sq;
1450         qp->rq_base = info->rq;
1451         qp->qp_type = info->type ? info->type : IRDMA_QP_TYPE_IWARP;
1452         qp->shadow_area = info->shadow_area;
1453         qp->sq_wrtrk_array = info->sq_wrtrk_array;
1454
1455         qp->rq_wrid_array = info->rq_wrid_array;
1456         qp->wqe_alloc_db = info->wqe_alloc_db;
1457         qp->qp_id = info->qp_id;
1458         qp->sq_size = info->sq_size;
1459         qp->push_mode = false;
1460         qp->max_sq_frag_cnt = info->max_sq_frag_cnt;
1461         sq_ring_size = qp->sq_size << sqshift;
1462         IRDMA_RING_INIT(qp->sq_ring, sq_ring_size);
1463         IRDMA_RING_INIT(qp->initial_ring, sq_ring_size);
1464         if (info->first_sq_wq) {
1465                 irdma_setup_connection_wqes(qp, info);
1466                 qp->swqe_polarity = 1;
1467                 qp->first_sq_wq = true;
1468         } else {
1469                 qp->swqe_polarity = 0;
1470         }
1471         qp->swqe_polarity_deferred = 1;
1472         qp->rwqe_polarity = 0;
1473         qp->rq_size = info->rq_size;
1474         qp->max_rq_frag_cnt = info->max_rq_frag_cnt;
1475         qp->max_inline_data = info->max_inline_data;
1476         qp->rq_wqe_size = rqshift;
1477         IRDMA_RING_INIT(qp->rq_ring, qp->rq_size);
1478         qp->rq_wqe_size_multiplier = 1 << rqshift;
1479         if (qp->uk_attrs->hw_rev == IRDMA_GEN_1)
1480                 qp->wqe_ops = iw_wqe_uk_ops_gen_1;
1481         else
1482                 qp->wqe_ops = iw_wqe_uk_ops;
1483         return ret_code;
1484 }
1485
1486 /**
1487  * irdma_uk_cq_init - initialize shared cq (user and kernel)
1488  * @cq: hw cq
1489  * @info: hw cq initialization info
1490  */
1491 void irdma_uk_cq_init(struct irdma_cq_uk *cq,
1492                       struct irdma_cq_uk_init_info *info)
1493 {
1494         cq->cq_base = info->cq_base;
1495         cq->cq_id = info->cq_id;
1496         cq->cq_size = info->cq_size;
1497         cq->cqe_alloc_db = info->cqe_alloc_db;
1498         cq->cq_ack_db = info->cq_ack_db;
1499         cq->shadow_area = info->shadow_area;
1500         cq->avoid_mem_cflct = info->avoid_mem_cflct;
1501         IRDMA_RING_INIT(cq->cq_ring, cq->cq_size);
1502         cq->polarity = 1;
1503 }
1504
1505 /**
1506  * irdma_uk_clean_cq - clean cq entries
1507  * @q: completion context
1508  * @cq: cq to clean
1509  */
1510 void irdma_uk_clean_cq(void *q, struct irdma_cq_uk *cq)
1511 {
1512         __le64 *cqe;
1513         u64 qword3, comp_ctx;
1514         u32 cq_head;
1515         u8 polarity, temp;
1516
1517         cq_head = cq->cq_ring.head;
1518         temp = cq->polarity;
1519         do {
1520                 if (cq->avoid_mem_cflct)
1521                         cqe = ((struct irdma_extended_cqe *)(cq->cq_base))[cq_head].buf;
1522                 else
1523                         cqe = cq->cq_base[cq_head].buf;
1524                 get_64bit_val(cqe, 24, &qword3);
1525                 polarity = (u8)FIELD_GET(IRDMA_CQ_VALID, qword3);
1526
1527                 if (polarity != temp)
1528                         break;
1529
1530                 get_64bit_val(cqe, 8, &comp_ctx);
1531                 if ((void *)(unsigned long)comp_ctx == q)
1532                         set_64bit_val(cqe, 8, 0);
1533
1534                 cq_head = (cq_head + 1) % cq->cq_ring.size;
1535                 if (!cq_head)
1536                         temp ^= 1;
1537         } while (true);
1538 }
1539
1540 /**
1541  * irdma_nop - post a nop
1542  * @qp: hw qp ptr
1543  * @wr_id: work request id
1544  * @signaled: signaled for completion
1545  * @post_sq: ring doorbell
1546  */
1547 int irdma_nop(struct irdma_qp_uk *qp, u64 wr_id, bool signaled, bool post_sq)
1548 {
1549         __le64 *wqe;
1550         u64 hdr;
1551         u32 wqe_idx;
1552         struct irdma_post_sq_info info = {};
1553
1554         info.push_wqe = false;
1555         info.wr_id = wr_id;
1556         wqe = irdma_qp_get_next_send_wqe(qp, &wqe_idx, IRDMA_QP_WQE_MIN_QUANTA,
1557                                          0, &info);
1558         if (!wqe)
1559                 return -ENOMEM;
1560
1561         irdma_clr_wqes(qp, wqe_idx);
1562
1563         set_64bit_val(wqe, 0, 0);
1564         set_64bit_val(wqe, 8, 0);
1565         set_64bit_val(wqe, 16, 0);
1566
1567         hdr = FIELD_PREP(IRDMAQPSQ_OPCODE, IRDMAQP_OP_NOP) |
1568               FIELD_PREP(IRDMAQPSQ_SIGCOMPL, signaled) |
1569               FIELD_PREP(IRDMAQPSQ_VALID, qp->swqe_polarity);
1570
1571         dma_wmb(); /* make sure WQE is populated before valid bit is set */
1572
1573         set_64bit_val(wqe, 24, hdr);
1574         if (post_sq)
1575                 irdma_uk_qp_post_wr(qp);
1576
1577         return 0;
1578 }
1579
1580 /**
1581  * irdma_fragcnt_to_quanta_sq - calculate quanta based on fragment count for SQ
1582  * @frag_cnt: number of fragments
1583  * @quanta: quanta for frag_cnt
1584  */
1585 int irdma_fragcnt_to_quanta_sq(u32 frag_cnt, u16 *quanta)
1586 {
1587         switch (frag_cnt) {
1588         case 0:
1589         case 1:
1590                 *quanta = IRDMA_QP_WQE_MIN_QUANTA;
1591                 break;
1592         case 2:
1593         case 3:
1594                 *quanta = 2;
1595                 break;
1596         case 4:
1597         case 5:
1598                 *quanta = 3;
1599                 break;
1600         case 6:
1601         case 7:
1602                 *quanta = 4;
1603                 break;
1604         case 8:
1605         case 9:
1606                 *quanta = 5;
1607                 break;
1608         case 10:
1609         case 11:
1610                 *quanta = 6;
1611                 break;
1612         case 12:
1613         case 13:
1614                 *quanta = 7;
1615                 break;
1616         case 14:
1617         case 15: /* when immediate data is present */
1618                 *quanta = 8;
1619                 break;
1620         default:
1621                 return -EINVAL;
1622         }
1623
1624         return 0;
1625 }
1626
1627 /**
1628  * irdma_fragcnt_to_wqesize_rq - calculate wqe size based on fragment count for RQ
1629  * @frag_cnt: number of fragments
1630  * @wqe_size: size in bytes given frag_cnt
1631  */
1632 int irdma_fragcnt_to_wqesize_rq(u32 frag_cnt, u16 *wqe_size)
1633 {
1634         switch (frag_cnt) {
1635         case 0:
1636         case 1:
1637                 *wqe_size = 32;
1638                 break;
1639         case 2:
1640         case 3:
1641                 *wqe_size = 64;
1642                 break;
1643         case 4:
1644         case 5:
1645         case 6:
1646         case 7:
1647                 *wqe_size = 128;
1648                 break;
1649         case 8:
1650         case 9:
1651         case 10:
1652         case 11:
1653         case 12:
1654         case 13:
1655         case 14:
1656                 *wqe_size = 256;
1657                 break;
1658         default:
1659                 return -EINVAL;
1660         }
1661
1662         return 0;
1663 }