drivers/net/qede/base/ecore_spq.c

   1 /*
   2  * Copyright (c) 2016 QLogic Corporation.
   3  * All rights reserved.
   4  * www.qlogic.com
   5  *
   6  * See LICENSE.qede_pmd for copyright and licensing details.
   7  */
   8
   9 #include "bcm_osal.h"
  10 #include "reg_addr.h"
  11 #include "ecore_gtt_reg_addr.h"
  12 #include "ecore_hsi_common.h"
  13 #include "ecore.h"
  14 #include "ecore_sp_api.h"
  15 #include "ecore_spq.h"
  16 #include "ecore_iro.h"
  17 #include "ecore_init_fw_funcs.h"
  18 #include "ecore_cxt.h"
  19 #include "ecore_int.h"
  20 #include "ecore_dev_api.h"
  21 #include "ecore_mcp.h"
  22 #include "ecore_hw.h"
  23 #include "ecore_sriov.h"
  24
  25 /***************************************************************************
  26  * Structures & Definitions
  27  ***************************************************************************/
  28
  29 #define SPQ_HIGH_PRI_RESERVE_DEFAULT    (1)
  30
  31 #define SPQ_BLOCK_DELAY_MAX_ITER        (10)
  32 #define SPQ_BLOCK_DELAY_US              (10)
  33 #define SPQ_BLOCK_SLEEP_MAX_ITER        (1000)
  34 #define SPQ_BLOCK_SLEEP_MS              (5)
  35
  36 /***************************************************************************
  37  * Blocking Imp. (BLOCK/EBLOCK mode)
  38  ***************************************************************************/
  39 static void ecore_spq_blocking_cb(struct ecore_hwfn *p_hwfn,
  40                                   void *cookie,
  41                                   union event_ring_data *data,
  42                                   u8 fw_return_code)
  43 {
  44         struct ecore_spq_comp_done *comp_done;
  45
  46         comp_done = (struct ecore_spq_comp_done *)cookie;
  47
  48         comp_done->done = 0x1;
  49         comp_done->fw_return_code = fw_return_code;
  50
  51         /* make update visible to waiting thread */
  52         OSAL_SMP_WMB(p_hwfn->p_dev);
  53 }
  54
  55 static enum _ecore_status_t __ecore_spq_block(struct ecore_hwfn *p_hwfn,
  56                                               struct ecore_spq_entry *p_ent,
  57                                               u8 *p_fw_ret,
  58                                               bool sleep_between_iter)
  59 {
  60         struct ecore_spq_comp_done *comp_done;
  61         u32 iter_cnt;
  62
  63         comp_done = (struct ecore_spq_comp_done *)p_ent->comp_cb.cookie;
  64         iter_cnt = sleep_between_iter ? SPQ_BLOCK_SLEEP_MAX_ITER
  65                                       : SPQ_BLOCK_DELAY_MAX_ITER;
  66
  67         while (iter_cnt--) {
  68                 OSAL_POLL_MODE_DPC(p_hwfn);
  69                 OSAL_SMP_RMB(p_hwfn->p_dev);
  70                 if (comp_done->done == 1) {
  71                         if (p_fw_ret)
  72                                 *p_fw_ret = comp_done->fw_return_code;
  73                         return ECORE_SUCCESS;
  74                 }
  75
  76                 if (sleep_between_iter)
  77                         OSAL_MSLEEP(SPQ_BLOCK_SLEEP_MS);
  78                 else
  79                         OSAL_UDELAY(SPQ_BLOCK_DELAY_US);
  80         }
  81
  82         return ECORE_TIMEOUT;
  83 }
  84
  85 static enum _ecore_status_t ecore_spq_block(struct ecore_hwfn *p_hwfn,
  86                                             struct ecore_spq_entry *p_ent,
  87                                             u8 *p_fw_ret, bool skip_quick_poll)
  88 {
  89         struct ecore_spq_comp_done *comp_done;
  90         enum _ecore_status_t rc;
  91
  92         /* A relatively short polling period w/o sleeping, to allow the FW to
  93          * complete the ramrod and thus possibly to avoid the following sleeps.
  94          */
  95         if (!skip_quick_poll) {
  96                 rc = __ecore_spq_block(p_hwfn, p_ent, p_fw_ret, false);
  97                 if (rc == ECORE_SUCCESS)
  98                         return ECORE_SUCCESS;
  99         }
 100
 101         /* Move to polling with a sleeping period between iterations */
 102         rc = __ecore_spq_block(p_hwfn, p_ent, p_fw_ret, true);
 103         if (rc == ECORE_SUCCESS)
 104                 return ECORE_SUCCESS;
 105
 106         DP_INFO(p_hwfn, "Ramrod is stuck, requesting MCP drain\n");
 107         rc = ecore_mcp_drain(p_hwfn, p_hwfn->p_main_ptt);
 108         if (rc != ECORE_SUCCESS) {
 109                 DP_NOTICE(p_hwfn, true, "MCP drain failed\n");
 110                 goto err;
 111         }
 112
 113         /* Retry after drain */
 114         rc = __ecore_spq_block(p_hwfn, p_ent, p_fw_ret, true);
 115         if (rc == ECORE_SUCCESS)
 116                 return ECORE_SUCCESS;
 117
 118         comp_done = (struct ecore_spq_comp_done *)p_ent->comp_cb.cookie;
 119         if (comp_done->done == 1) {
 120                 if (p_fw_ret)
 121                         *p_fw_ret = comp_done->fw_return_code;
 122                 return ECORE_SUCCESS;
 123         }
 124 err:
 125         DP_NOTICE(p_hwfn, true,
 126                   "Ramrod is stuck [CID %08x cmd %02x proto %02x echo %04x]\n",
 127                   OSAL_LE32_TO_CPU(p_ent->elem.hdr.cid),
 128                   p_ent->elem.hdr.cmd_id, p_ent->elem.hdr.protocol_id,
 129                   OSAL_LE16_TO_CPU(p_ent->elem.hdr.echo));
 130
 131         ecore_hw_err_notify(p_hwfn, ECORE_HW_ERR_RAMROD_FAIL);
 132
 133         return ECORE_BUSY;
 134 }
 135
 136 /***************************************************************************
 137  * SPQ entries inner API
 138  ***************************************************************************/
 139 static enum _ecore_status_t
 140 ecore_spq_fill_entry(struct ecore_hwfn *p_hwfn, struct ecore_spq_entry *p_ent)
 141 {
 142         p_ent->flags = 0;
 143
 144         switch (p_ent->comp_mode) {
 145         case ECORE_SPQ_MODE_EBLOCK:
 146         case ECORE_SPQ_MODE_BLOCK:
 147                 p_ent->comp_cb.function = ecore_spq_blocking_cb;
 148                 break;
 149         case ECORE_SPQ_MODE_CB:
 150                 break;
 151         default:
 152                 DP_NOTICE(p_hwfn, true, "Unknown SPQE completion mode %d\n",
 153                           p_ent->comp_mode);
 154                 return ECORE_INVAL;
 155         }
 156
 157         DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 158                    "Ramrod header: [CID 0x%08x CMD 0x%02x protocol 0x%02x]"
 159                    " Data pointer: [%08x:%08x] Completion Mode: %s\n",
 160                    p_ent->elem.hdr.cid, p_ent->elem.hdr.cmd_id,
 161                    p_ent->elem.hdr.protocol_id,
 162                    p_ent->elem.data_ptr.hi, p_ent->elem.data_ptr.lo,
 163                    D_TRINE(p_ent->comp_mode, ECORE_SPQ_MODE_EBLOCK,
 164                            ECORE_SPQ_MODE_BLOCK, "MODE_EBLOCK", "MODE_BLOCK",
 165                            "MODE_CB"));
 166
 167         return ECORE_SUCCESS;
 168 }
 169
 170 /***************************************************************************
 171  * HSI access
 172  ***************************************************************************/
 173 static void ecore_spq_hw_initialize(struct ecore_hwfn *p_hwfn,
 174                                     struct ecore_spq *p_spq)
 175 {
 176         u16 pq;
 177         struct ecore_cxt_info cxt_info;
 178         struct core_conn_context *p_cxt;
 179         union ecore_qm_pq_params pq_params;
 180         enum _ecore_status_t rc;
 181
 182         cxt_info.iid = p_spq->cid;
 183
 184         rc = ecore_cxt_get_cid_info(p_hwfn, &cxt_info);
 185
 186         if (rc < 0) {
 187                 DP_NOTICE(p_hwfn, true, "Cannot find context info for cid=%d\n",
 188                           p_spq->cid);
 189                 return;
 190         }
 191
 192         p_cxt = cxt_info.p_cxt;
 193
 194         if (ECORE_IS_BB(p_hwfn->p_dev) || ECORE_IS_AH(p_hwfn->p_dev)) {
 195                 SET_FIELD(p_cxt->xstorm_ag_context.flags10,
 196                           E4_XSTORM_CORE_CONN_AG_CTX_DQ_CF_EN, 1);
 197                 SET_FIELD(p_cxt->xstorm_ag_context.flags1,
 198                           E4_XSTORM_CORE_CONN_AG_CTX_DQ_CF_ACTIVE, 1);
 199                 /* SET_FIELD(p_cxt->xstorm_ag_context.flags10,
 200                  *        E4_XSTORM_CORE_CONN_AG_CTX_SLOW_PATH_EN, 1);
 201                  */
 202                 SET_FIELD(p_cxt->xstorm_ag_context.flags9,
 203                           E4_XSTORM_CORE_CONN_AG_CTX_CONSOLID_PROD_CF_EN, 1);
 204         }
 205
 206         /* CDU validation - FIXME currently disabled */
 207
 208         /* QM physical queue */
 209         OSAL_MEMSET(&pq_params, 0, sizeof(pq_params));
 210         pq_params.core.tc = LB_TC;
 211         pq = ecore_get_qm_pq(p_hwfn, PROTOCOLID_CORE, &pq_params);
 212         p_cxt->xstorm_ag_context.physical_q0 = OSAL_CPU_TO_LE16(pq);
 213
 214         p_cxt->xstorm_st_context.spq_base_lo =
 215             DMA_LO_LE(p_spq->chain.p_phys_addr);
 216         p_cxt->xstorm_st_context.spq_base_hi =
 217             DMA_HI_LE(p_spq->chain.p_phys_addr);
 218
 219         DMA_REGPAIR_LE(p_cxt->xstorm_st_context.consolid_base_addr,
 220                        p_hwfn->p_consq->chain.p_phys_addr);
 221 }
 222
 223 static enum _ecore_status_t ecore_spq_hw_post(struct ecore_hwfn *p_hwfn,
 224                                               struct ecore_spq *p_spq,
 225                                               struct ecore_spq_entry *p_ent)
 226 {
 227         struct ecore_chain *p_chain = &p_hwfn->p_spq->chain;
 228         u16 echo = ecore_chain_get_prod_idx(p_chain);
 229         struct slow_path_element *elem;
 230         struct core_db_data db;
 231
 232         p_ent->elem.hdr.echo = OSAL_CPU_TO_LE16(echo);
 233         elem = ecore_chain_produce(p_chain);
 234         if (!elem) {
 235                 DP_NOTICE(p_hwfn, true, "Failed to produce from SPQ chain\n");
 236                 return ECORE_INVAL;
 237         }
 238
 239         *elem = p_ent->elem;    /* struct assignment */
 240
 241         /* send a doorbell on the slow hwfn session */
 242         OSAL_MEMSET(&db, 0, sizeof(db));
 243         SET_FIELD(db.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
 244         SET_FIELD(db.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET);
 245         SET_FIELD(db.params, CORE_DB_DATA_AGG_VAL_SEL,
 246                   DQ_XCM_CORE_SPQ_PROD_CMD);
 247         db.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
 248         db.spq_prod = OSAL_CPU_TO_LE16(ecore_chain_get_prod_idx(p_chain));
 249
 250         /* make sure the SPQE is updated before the doorbell */
 251         OSAL_WMB(p_hwfn->p_dev);
 252
 253         DOORBELL(p_hwfn, DB_ADDR(p_spq->cid, DQ_DEMS_LEGACY),
 254                  *(u32 *)&db);
 255
 256         /* make sure doorbell is rang */
 257         OSAL_WMB(p_hwfn->p_dev);
 258
 259         DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 260                    "Doorbelled [0x%08x, CID 0x%08x] with Flags: %02x"
 261                    " agg_params: %02x, prod: %04x\n",
 262                    DB_ADDR(p_spq->cid, DQ_DEMS_LEGACY), p_spq->cid, db.params,
 263                    db.agg_flags, ecore_chain_get_prod_idx(p_chain));
 264
 265         return ECORE_SUCCESS;
 266 }
 267
 268 /***************************************************************************
 269  * Asynchronous events
 270  ***************************************************************************/
 271
 272 static enum _ecore_status_t
 273 ecore_async_event_completion(struct ecore_hwfn *p_hwfn,
 274                              struct event_ring_entry *p_eqe)
 275 {
 276         switch (p_eqe->protocol_id) {
 277         case PROTOCOLID_COMMON:
 278                 return ecore_sriov_eqe_event(p_hwfn,
 279                                              p_eqe->opcode,
 280                                              p_eqe->echo, &p_eqe->data);
 281         default:
 282                 DP_NOTICE(p_hwfn,
 283                           true, "Unknown Async completion for protocol: %d\n",
 284                           p_eqe->protocol_id);
 285                 return ECORE_INVAL;
 286         }
 287 }
 288
 289 /***************************************************************************
 290  * EQ API
 291  ***************************************************************************/
 292 void ecore_eq_prod_update(struct ecore_hwfn *p_hwfn, u16 prod)
 293 {
 294         u32 addr = GTT_BAR0_MAP_REG_USDM_RAM +
 295             USTORM_EQE_CONS_OFFSET(p_hwfn->rel_pf_id);
 296
 297         REG_WR16(p_hwfn, addr, prod);
 298
 299         /* keep prod updates ordered */
 300         OSAL_MMIOWB(p_hwfn->p_dev);
 301 }
 302
 303 enum _ecore_status_t ecore_eq_completion(struct ecore_hwfn *p_hwfn,
 304                                          void *cookie)
 305 {
 306         struct ecore_eq *p_eq = cookie;
 307         struct ecore_chain *p_chain = &p_eq->chain;
 308         enum _ecore_status_t rc = 0;
 309
 310         /* take a snapshot of the FW consumer */
 311         u16 fw_cons_idx = OSAL_LE16_TO_CPU(*p_eq->p_fw_cons);
 312
 313         DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ, "fw_cons_idx %x\n", fw_cons_idx);
 314
 315         /* Need to guarantee the fw_cons index we use points to a usuable
 316          * element (to comply with our chain), so our macros would comply
 317          */
 318         if ((fw_cons_idx & ecore_chain_get_usable_per_page(p_chain)) ==
 319             ecore_chain_get_usable_per_page(p_chain)) {
 320                 fw_cons_idx += ecore_chain_get_unusable_per_page(p_chain);
 321         }
 322
 323         /* Complete current segment of eq entries */
 324         while (fw_cons_idx != ecore_chain_get_cons_idx(p_chain)) {
 325                 struct event_ring_entry *p_eqe = ecore_chain_consume(p_chain);
 326                 if (!p_eqe) {
 327                         rc = ECORE_INVAL;
 328                         break;
 329                 }
 330
 331                 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 332                            "op %x prot %x res0 %x echo %x fwret %x flags %x\n",
 333                            p_eqe->opcode,            /* Event Opcode */
 334                            p_eqe->protocol_id,  /* Event Protocol ID */
 335                            p_eqe->reserved0,    /* Reserved */
 336                            /* Echo value from ramrod data on the host */
 337                            OSAL_LE16_TO_CPU(p_eqe->echo),
 338                            p_eqe->fw_return_code,    /* FW return code for SP
 339                                                       * ramrods
 340                                                       */
 341                            p_eqe->flags);
 342
 343                 if (GET_FIELD(p_eqe->flags, EVENT_RING_ENTRY_ASYNC)) {
 344                         if (ecore_async_event_completion(p_hwfn, p_eqe))
 345                                 rc = ECORE_INVAL;
 346                 } else if (ecore_spq_completion(p_hwfn,
 347                                                 p_eqe->echo,
 348                                                 p_eqe->fw_return_code,
 349                                                 &p_eqe->data)) {
 350                         rc = ECORE_INVAL;
 351                 }
 352
 353                 ecore_chain_recycle_consumed(p_chain);
 354         }
 355
 356         ecore_eq_prod_update(p_hwfn, ecore_chain_get_prod_idx(p_chain));
 357
 358         return rc;
 359 }
 360
 361 struct ecore_eq *ecore_eq_alloc(struct ecore_hwfn *p_hwfn, u16 num_elem)
 362 {
 363         struct ecore_eq *p_eq;
 364
 365         /* Allocate EQ struct */
 366         p_eq = OSAL_ZALLOC(p_hwfn->p_dev, GFP_KERNEL, sizeof(*p_eq));
 367         if (!p_eq) {
 368                 DP_NOTICE(p_hwfn, true,
 369                           "Failed to allocate `struct ecore_eq'\n");
 370                 return OSAL_NULL;
 371         }
 372
 373         /* Allocate and initialize EQ chain*/
 374         if (ecore_chain_alloc(p_hwfn->p_dev,
 375                               ECORE_CHAIN_USE_TO_PRODUCE,
 376                               ECORE_CHAIN_MODE_PBL,
 377                               ECORE_CHAIN_CNT_TYPE_U16,
 378                               num_elem,
 379                               sizeof(union event_ring_element),
 380                               &p_eq->chain, OSAL_NULL)) {
 381                 DP_NOTICE(p_hwfn, true, "Failed to allocate eq chain\n");
 382                 goto eq_allocate_fail;
 383         }
 384
 385         /* register EQ completion on the SP SB */
 386         ecore_int_register_cb(p_hwfn, ecore_eq_completion,
 387                               p_eq, &p_eq->eq_sb_index, &p_eq->p_fw_cons);
 388
 389         return p_eq;
 390
 391 eq_allocate_fail:
 392         ecore_eq_free(p_hwfn, p_eq);
 393         return OSAL_NULL;
 394 }
 395
 396 void ecore_eq_setup(struct ecore_hwfn *p_hwfn, struct ecore_eq *p_eq)
 397 {
 398         ecore_chain_reset(&p_eq->chain);
 399 }
 400
 401 void ecore_eq_free(struct ecore_hwfn *p_hwfn, struct ecore_eq *p_eq)
 402 {
 403         if (!p_eq)
 404                 return;
 405         ecore_chain_free(p_hwfn->p_dev, &p_eq->chain);
 406         OSAL_FREE(p_hwfn->p_dev, p_eq);
 407 }
 408
 409 /***************************************************************************
 410 * CQE API - manipulate EQ functionality
 411 ***************************************************************************/
 412 static enum _ecore_status_t ecore_cqe_completion(struct ecore_hwfn *p_hwfn,
 413                                                  struct eth_slow_path_rx_cqe
 414                                                  *cqe,
 415                                                  enum protocol_type protocol)
 416 {
 417         if (IS_VF(p_hwfn->p_dev))
 418                 return OSAL_VF_CQE_COMPLETION(p_hwfn, cqe, protocol);
 419
 420         /* @@@tmp - it's possible we'll eventually want to handle some
 421          * actual commands that can arrive here, but for now this is only
 422          * used to complete the ramrod using the echo value on the cqe
 423          */
 424         return ecore_spq_completion(p_hwfn, cqe->echo, 0, OSAL_NULL);
 425 }
 426
 427 enum _ecore_status_t ecore_eth_cqe_completion(struct ecore_hwfn *p_hwfn,
 428                                               struct eth_slow_path_rx_cqe *cqe)
 429 {
 430         enum _ecore_status_t rc;
 431
 432         rc = ecore_cqe_completion(p_hwfn, cqe, PROTOCOLID_ETH);
 433         if (rc) {
 434                 DP_NOTICE(p_hwfn, true,
 435                           "Failed to handle RXQ CQE [cmd 0x%02x]\n",
 436                           cqe->ramrod_cmd_id);
 437         }
 438
 439         return rc;
 440 }
 441
 442 /***************************************************************************
 443  * Slow hwfn Queue (spq)
 444  ***************************************************************************/
 445 void ecore_spq_setup(struct ecore_hwfn *p_hwfn)
 446 {
 447         struct ecore_spq *p_spq = p_hwfn->p_spq;
 448         struct ecore_spq_entry *p_virt = OSAL_NULL;
 449         dma_addr_t p_phys = 0;
 450         u32 i, capacity;
 451
 452         OSAL_LIST_INIT(&p_spq->pending);
 453         OSAL_LIST_INIT(&p_spq->completion_pending);
 454         OSAL_LIST_INIT(&p_spq->free_pool);
 455         OSAL_LIST_INIT(&p_spq->unlimited_pending);
 456         OSAL_SPIN_LOCK_INIT(&p_spq->lock);
 457
 458         /* SPQ empty pool */
 459         p_phys = p_spq->p_phys + OFFSETOF(struct ecore_spq_entry, ramrod);
 460         p_virt = p_spq->p_virt;
 461
 462         capacity = ecore_chain_get_capacity(&p_spq->chain);
 463         for (i = 0; i < capacity; i++) {
 464                 DMA_REGPAIR_LE(p_virt->elem.data_ptr, p_phys);
 465
 466                 OSAL_LIST_PUSH_TAIL(&p_virt->list, &p_spq->free_pool);
 467
 468                 p_virt++;
 469                 p_phys += sizeof(struct ecore_spq_entry);
 470         }
 471
 472         /* Statistics */
 473         p_spq->normal_count = 0;
 474         p_spq->comp_count = 0;
 475         p_spq->comp_sent_count = 0;
 476         p_spq->unlimited_pending_count = 0;
 477
 478         OSAL_MEM_ZERO(p_spq->p_comp_bitmap,
 479                       SPQ_COMP_BMAP_SIZE * sizeof(unsigned long));
 480         p_spq->comp_bitmap_idx = 0;
 481
 482         /* SPQ cid, cannot fail */
 483         ecore_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_spq->cid);
 484         ecore_spq_hw_initialize(p_hwfn, p_spq);
 485
 486         /* reset the chain itself */
 487         ecore_chain_reset(&p_spq->chain);
 488 }
 489
 490 enum _ecore_status_t ecore_spq_alloc(struct ecore_hwfn *p_hwfn)
 491 {
 492         struct ecore_spq_entry *p_virt = OSAL_NULL;
 493         struct ecore_spq *p_spq = OSAL_NULL;
 494         dma_addr_t p_phys = 0;
 495         u32 capacity;
 496
 497         /* SPQ struct */
 498         p_spq =
 499             OSAL_ZALLOC(p_hwfn->p_dev, GFP_KERNEL, sizeof(struct ecore_spq));
 500         if (!p_spq) {
 501                 DP_NOTICE(p_hwfn, true,
 502                           "Failed to allocate `struct ecore_spq'\n");
 503                 return ECORE_NOMEM;
 504         }
 505
 506         /* SPQ ring  */
 507         if (ecore_chain_alloc(p_hwfn->p_dev,
 508                               ECORE_CHAIN_USE_TO_PRODUCE,
 509                               ECORE_CHAIN_MODE_SINGLE,
 510                               ECORE_CHAIN_CNT_TYPE_U16,
 511                               0, /* N/A when the mode is SINGLE */
 512                               sizeof(struct slow_path_element),
 513                               &p_spq->chain, OSAL_NULL)) {
 514                 DP_NOTICE(p_hwfn, true, "Failed to allocate spq chain\n");
 515                 goto spq_allocate_fail;
 516         }
 517
 518         /* allocate and fill the SPQ elements (incl. ramrod data list) */
 519         capacity = ecore_chain_get_capacity(&p_spq->chain);
 520         p_virt = OSAL_DMA_ALLOC_COHERENT(p_hwfn->p_dev, &p_phys,
 521                                          capacity *
 522                                          sizeof(struct ecore_spq_entry));
 523         if (!p_virt)
 524                 goto spq_allocate_fail;
 525
 526         p_spq->p_virt = p_virt;
 527         p_spq->p_phys = p_phys;
 528
 529         OSAL_SPIN_LOCK_ALLOC(p_hwfn, &p_spq->lock);
 530
 531         p_hwfn->p_spq = p_spq;
 532         return ECORE_SUCCESS;
 533
 534 spq_allocate_fail:
 535         ecore_chain_free(p_hwfn->p_dev, &p_spq->chain);
 536         OSAL_FREE(p_hwfn->p_dev, p_spq);
 537         return ECORE_NOMEM;
 538 }
 539
 540 void ecore_spq_free(struct ecore_hwfn *p_hwfn)
 541 {
 542         struct ecore_spq *p_spq = p_hwfn->p_spq;
 543         u32 capacity;
 544
 545         if (!p_spq)
 546                 return;
 547
 548         if (p_spq->p_virt) {
 549                 capacity = ecore_chain_get_capacity(&p_spq->chain);
 550                 OSAL_DMA_FREE_COHERENT(p_hwfn->p_dev,
 551                                        p_spq->p_virt,
 552                                        p_spq->p_phys,
 553                                        capacity *
 554                                        sizeof(struct ecore_spq_entry));
 555         }
 556
 557         ecore_chain_free(p_hwfn->p_dev, &p_spq->chain);
 558         OSAL_SPIN_LOCK_DEALLOC(&p_spq->lock);
 559         OSAL_FREE(p_hwfn->p_dev, p_spq);
 560 }
 561
 562 enum _ecore_status_t
 563 ecore_spq_get_entry(struct ecore_hwfn *p_hwfn, struct ecore_spq_entry **pp_ent)
 564 {
 565         struct ecore_spq *p_spq = p_hwfn->p_spq;
 566         struct ecore_spq_entry *p_ent = OSAL_NULL;
 567         enum _ecore_status_t rc = ECORE_SUCCESS;
 568
 569         OSAL_SPIN_LOCK(&p_spq->lock);
 570
 571         if (OSAL_LIST_IS_EMPTY(&p_spq->free_pool)) {
 572                 p_ent = OSAL_ZALLOC(p_hwfn->p_dev, GFP_ATOMIC, sizeof(*p_ent));
 573                 if (!p_ent) {
 574                         DP_NOTICE(p_hwfn, true,
 575                                  "Failed to allocate an SPQ entry for a pending"
 576                                  " ramrod\n");
 577                         rc = ECORE_NOMEM;
 578                         goto out_unlock;
 579                 }
 580                 p_ent->queue = &p_spq->unlimited_pending;
 581         } else {
 582                 p_ent = OSAL_LIST_FIRST_ENTRY(&p_spq->free_pool,
 583                                               struct ecore_spq_entry, list);
 584                 OSAL_LIST_REMOVE_ENTRY(&p_ent->list, &p_spq->free_pool);
 585                 p_ent->queue = &p_spq->pending;
 586         }
 587
 588         *pp_ent = p_ent;
 589
 590 out_unlock:
 591         OSAL_SPIN_UNLOCK(&p_spq->lock);
 592         return rc;
 593 }
 594
 595 /* Locked variant; Should be called while the SPQ lock is taken */
 596 static void __ecore_spq_return_entry(struct ecore_hwfn *p_hwfn,
 597                                      struct ecore_spq_entry *p_ent)
 598 {
 599         OSAL_LIST_PUSH_TAIL(&p_ent->list, &p_hwfn->p_spq->free_pool);
 600 }
 601
 602 void ecore_spq_return_entry(struct ecore_hwfn *p_hwfn,
 603                             struct ecore_spq_entry *p_ent)
 604 {
 605         OSAL_SPIN_LOCK(&p_hwfn->p_spq->lock);
 606         __ecore_spq_return_entry(p_hwfn, p_ent);
 607         OSAL_SPIN_UNLOCK(&p_hwfn->p_spq->lock);
 608 }
 609
 610 /**
 611  * @brief ecore_spq_add_entry - adds a new entry to the pending
 612  *        list. Should be used while lock is being held.
 613  *
 614  * Addes an entry to the pending list is there is room (en empty
 615  * element is available in the free_pool), or else places the
 616  * entry in the unlimited_pending pool.
 617  *
 618  * @param p_hwfn
 619  * @param p_ent
 620  * @param priority
 621  *
 622  * @return enum _ecore_status_t
 623  */
 624 static enum _ecore_status_t
 625 ecore_spq_add_entry(struct ecore_hwfn *p_hwfn,
 626                     struct ecore_spq_entry *p_ent, enum spq_priority priority)
 627 {
 628         struct ecore_spq *p_spq = p_hwfn->p_spq;
 629
 630         if (p_ent->queue == &p_spq->unlimited_pending) {
 631                 if (OSAL_LIST_IS_EMPTY(&p_spq->free_pool)) {
 632                         OSAL_LIST_PUSH_TAIL(&p_ent->list,
 633                                             &p_spq->unlimited_pending);
 634                         p_spq->unlimited_pending_count++;
 635
 636                         return ECORE_SUCCESS;
 637
 638                 } else {
 639                         struct ecore_spq_entry *p_en2;
 640
 641                         p_en2 = OSAL_LIST_FIRST_ENTRY(&p_spq->free_pool,
 642                                                      struct ecore_spq_entry,
 643                                                      list);
 644                         OSAL_LIST_REMOVE_ENTRY(&p_en2->list, &p_spq->free_pool);
 645
 646                         /* Copy the ring element physical pointer to the new
 647                          * entry, since we are about to override the entire ring
 648                          * entry and don't want to lose the pointer.
 649                          */
 650                         p_ent->elem.data_ptr = p_en2->elem.data_ptr;
 651
 652                         *p_en2 = *p_ent;
 653
 654                         /* EBLOCK responsible to free the allocated p_ent */
 655                         if (p_ent->comp_mode != ECORE_SPQ_MODE_EBLOCK)
 656                                 OSAL_FREE(p_hwfn->p_dev, p_ent);
 657
 658                         p_ent = p_en2;
 659                 }
 660         }
 661
 662         /* entry is to be placed in 'pending' queue */
 663         switch (priority) {
 664         case ECORE_SPQ_PRIORITY_NORMAL:
 665                 OSAL_LIST_PUSH_TAIL(&p_ent->list, &p_spq->pending);
 666                 p_spq->normal_count++;
 667                 break;
 668         case ECORE_SPQ_PRIORITY_HIGH:
 669                 OSAL_LIST_PUSH_HEAD(&p_ent->list, &p_spq->pending);
 670                 p_spq->high_count++;
 671                 break;
 672         default:
 673                 return ECORE_INVAL;
 674         }
 675
 676         return ECORE_SUCCESS;
 677 }
 678
 679 /***************************************************************************
 680  * Accessor
 681  ***************************************************************************/
 682
 683 u32 ecore_spq_get_cid(struct ecore_hwfn *p_hwfn)
 684 {
 685         if (!p_hwfn->p_spq)
 686                 return 0xffffffff;      /* illegal */
 687         return p_hwfn->p_spq->cid;
 688 }
 689
 690 /***************************************************************************
 691  * Posting new Ramrods
 692  ***************************************************************************/
 693
 694 static enum _ecore_status_t ecore_spq_post_list(struct ecore_hwfn *p_hwfn,
 695                                                 osal_list_t *head,
 696                                                 u32 keep_reserve)
 697 {
 698         struct ecore_spq *p_spq = p_hwfn->p_spq;
 699         enum _ecore_status_t rc;
 700
 701         /* TODO - implementation might be wasteful; will always keep room
 702          * for an additional high priority ramrod (even if one is already
 703          * pending FW)
 704          */
 705         while (ecore_chain_get_elem_left(&p_spq->chain) > keep_reserve &&
 706                !OSAL_LIST_IS_EMPTY(head)) {
 707                 struct ecore_spq_entry *p_ent =
 708                     OSAL_LIST_FIRST_ENTRY(head, struct ecore_spq_entry, list);
 709                 if (p_ent != OSAL_NULL) {
 710 #if defined(_NTDDK_)
 711 #pragma warning(suppress : 6011 28182)
 712 #endif
 713                         OSAL_LIST_REMOVE_ENTRY(&p_ent->list, head);
 714                         OSAL_LIST_PUSH_TAIL(&p_ent->list,
 715                                             &p_spq->completion_pending);
 716                         p_spq->comp_sent_count++;
 717
 718                         rc = ecore_spq_hw_post(p_hwfn, p_spq, p_ent);
 719                         if (rc) {
 720                                 OSAL_LIST_REMOVE_ENTRY(&p_ent->list,
 721                                                     &p_spq->completion_pending);
 722                                 __ecore_spq_return_entry(p_hwfn, p_ent);
 723                                 return rc;
 724                         }
 725                 }
 726         }
 727
 728         return ECORE_SUCCESS;
 729 }
 730
 731 static enum _ecore_status_t ecore_spq_pend_post(struct ecore_hwfn *p_hwfn)
 732 {
 733         struct ecore_spq *p_spq = p_hwfn->p_spq;
 734         struct ecore_spq_entry *p_ent = OSAL_NULL;
 735
 736         while (!OSAL_LIST_IS_EMPTY(&p_spq->free_pool)) {
 737                 if (OSAL_LIST_IS_EMPTY(&p_spq->unlimited_pending))
 738                         break;
 739
 740                 p_ent = OSAL_LIST_FIRST_ENTRY(&p_spq->unlimited_pending,
 741                                               struct ecore_spq_entry, list);
 742                 if (!p_ent)
 743                         return ECORE_INVAL;
 744
 745 #if defined(_NTDDK_)
 746 #pragma warning(suppress : 6011)
 747 #endif
 748                 OSAL_LIST_REMOVE_ENTRY(&p_ent->list, &p_spq->unlimited_pending);
 749
 750                 ecore_spq_add_entry(p_hwfn, p_ent, p_ent->priority);
 751         }
 752
 753         return ecore_spq_post_list(p_hwfn,
 754                                  &p_spq->pending, SPQ_HIGH_PRI_RESERVE_DEFAULT);
 755 }
 756
 757 enum _ecore_status_t ecore_spq_post(struct ecore_hwfn *p_hwfn,
 758                                     struct ecore_spq_entry *p_ent,
 759                                     u8 *fw_return_code)
 760 {
 761         enum _ecore_status_t rc = ECORE_SUCCESS;
 762         struct ecore_spq *p_spq = p_hwfn ? p_hwfn->p_spq : OSAL_NULL;
 763         bool b_ret_ent = true;
 764
 765         if (!p_hwfn)
 766                 return ECORE_INVAL;
 767
 768         if (!p_ent) {
 769                 DP_NOTICE(p_hwfn, true, "Got a NULL pointer\n");
 770                 return ECORE_INVAL;
 771         }
 772
 773         if (p_hwfn->p_dev->recov_in_prog) {
 774                 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 775                            "Recovery is in progress -> skip spq post"
 776                            " [cmd %02x protocol %02x]\n",
 777                            p_ent->elem.hdr.cmd_id, p_ent->elem.hdr.protocol_id);
 778                 /* Return success to let the flows to be completed successfully
 779                  * w/o any error handling.
 780                  */
 781                 return ECORE_SUCCESS;
 782         }
 783
 784         OSAL_SPIN_LOCK(&p_spq->lock);
 785
 786         /* Complete the entry */
 787         rc = ecore_spq_fill_entry(p_hwfn, p_ent);
 788
 789         /* Check return value after LOCK is taken for cleaner error flow */
 790         if (rc)
 791                 goto spq_post_fail;
 792
 793         /* Add the request to the pending queue */
 794         rc = ecore_spq_add_entry(p_hwfn, p_ent, p_ent->priority);
 795         if (rc)
 796                 goto spq_post_fail;
 797
 798         rc = ecore_spq_pend_post(p_hwfn);
 799         if (rc) {
 800                 /* Since it's possible that pending failed for a different
 801                  * entry [although unlikely], the failed entry was already
 802                  * dealt with; No need to return it here.
 803                  */
 804                 b_ret_ent = false;
 805                 goto spq_post_fail;
 806         }
 807
 808         OSAL_SPIN_UNLOCK(&p_spq->lock);
 809
 810         if (p_ent->comp_mode == ECORE_SPQ_MODE_EBLOCK) {
 811                 /* For entries in ECORE BLOCK mode, the completion code cannot
 812                  * perform the necessary cleanup - if it did, we couldn't
 813                  * access p_ent here to see whether it's successful or not.
 814                  * Thus, after gaining the answer perform the cleanup here.
 815                  */
 816                 rc = ecore_spq_block(p_hwfn, p_ent, fw_return_code,
 817                                      p_ent->queue == &p_spq->unlimited_pending);
 818
 819                 if (p_ent->queue == &p_spq->unlimited_pending) {
 820                         /* This is an allocated p_ent which does not need to
 821                          * return to pool.
 822                          */
 823                         OSAL_FREE(p_hwfn->p_dev, p_ent);
 824
 825                         /* TBD: handle error flow and remove p_ent from
 826                          * completion pending
 827                          */
 828                         return rc;
 829                 }
 830
 831                 if (rc)
 832                         goto spq_post_fail2;
 833
 834                 /* return to pool */
 835                 ecore_spq_return_entry(p_hwfn, p_ent);
 836         }
 837         return rc;
 838
 839 spq_post_fail2:
 840         OSAL_SPIN_LOCK(&p_spq->lock);
 841         OSAL_LIST_REMOVE_ENTRY(&p_ent->list, &p_spq->completion_pending);
 842         ecore_chain_return_produced(&p_spq->chain);
 843
 844 spq_post_fail:
 845         /* return to the free pool */
 846         if (b_ret_ent)
 847                 __ecore_spq_return_entry(p_hwfn, p_ent);
 848         OSAL_SPIN_UNLOCK(&p_spq->lock);
 849
 850         return rc;
 851 }
 852
 853 enum _ecore_status_t ecore_spq_completion(struct ecore_hwfn *p_hwfn,
 854                                           __le16 echo,
 855                                           u8 fw_return_code,
 856                                           union event_ring_data *p_data)
 857 {
 858         struct ecore_spq *p_spq;
 859         struct ecore_spq_entry *p_ent = OSAL_NULL;
 860         struct ecore_spq_entry *tmp;
 861         struct ecore_spq_entry *found = OSAL_NULL;
 862         enum _ecore_status_t rc;
 863
 864         if (!p_hwfn)
 865                 return ECORE_INVAL;
 866
 867         p_spq = p_hwfn->p_spq;
 868         if (!p_spq)
 869                 return ECORE_INVAL;
 870
 871         OSAL_SPIN_LOCK(&p_spq->lock);
 872         OSAL_LIST_FOR_EACH_ENTRY_SAFE(p_ent,
 873                                       tmp,
 874                                       &p_spq->completion_pending,
 875                                       list, struct ecore_spq_entry) {
 876                 if (p_ent->elem.hdr.echo == echo) {
 877                         OSAL_LIST_REMOVE_ENTRY(&p_ent->list,
 878                                                &p_spq->completion_pending);
 879
 880                         /* Avoid overriding of SPQ entries when getting
 881                          * out-of-order completions, by marking the completions
 882                          * in a bitmap and increasing the chain consumer only
 883                          * for the first successive completed entries.
 884                          */
 885                         SPQ_COMP_BMAP_SET_BIT(p_spq, echo);
 886                         while (SPQ_COMP_BMAP_TEST_BIT(p_spq,
 887                                                       p_spq->comp_bitmap_idx)) {
 888                                 SPQ_COMP_BMAP_CLEAR_BIT(p_spq,
 889                                                         p_spq->comp_bitmap_idx);
 890                                 p_spq->comp_bitmap_idx++;
 891                                 ecore_chain_return_produced(&p_spq->chain);
 892                         }
 893
 894                         p_spq->comp_count++;
 895                         found = p_ent;
 896                         break;
 897                 }
 898
 899                 /* This is debug and should be relatively uncommon - depends
 900                  * on scenarios which have mutliple per-PF sent ramrods.
 901                  */
 902                 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 903                            "Got completion for echo %04x - doesn't match"
 904                            " echo %04x in completion pending list\n",
 905                            OSAL_LE16_TO_CPU(echo),
 906                            OSAL_LE16_TO_CPU(p_ent->elem.hdr.echo));
 907         }
 908
 909         /* Release lock before callback, as callback may post
 910          * an additional ramrod.
 911          */
 912         OSAL_SPIN_UNLOCK(&p_spq->lock);
 913
 914         if (!found) {
 915                 DP_NOTICE(p_hwfn, true,
 916                           "Failed to find an entry this"
 917                           " EQE [echo %04x] completes\n",
 918                           OSAL_LE16_TO_CPU(echo));
 919                 return ECORE_EXISTS;
 920         }
 921
 922         DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 923                    "Complete EQE [echo %04x]: func %p cookie %p)\n",
 924                    OSAL_LE16_TO_CPU(echo),
 925                    p_ent->comp_cb.function, p_ent->comp_cb.cookie);
 926         if (found->comp_cb.function)
 927                 found->comp_cb.function(p_hwfn, found->comp_cb.cookie, p_data,
 928                                         fw_return_code);
 929         else
 930                 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 931                            "Got a completion without a callback function\n");
 932
 933         if ((found->comp_mode != ECORE_SPQ_MODE_EBLOCK) ||
 934             (found->queue == &p_spq->unlimited_pending))
 935                 /* EBLOCK  is responsible for returning its own entry into the
 936                  * free list, unless it originally added the entry into the
 937                  * unlimited pending list.
 938                  */
 939                 ecore_spq_return_entry(p_hwfn, found);
 940
 941         /* Attempt to post pending requests */
 942         OSAL_SPIN_LOCK(&p_spq->lock);
 943         rc = ecore_spq_pend_post(p_hwfn);
 944         OSAL_SPIN_UNLOCK(&p_spq->lock);
 945
 946         return rc;
 947 }
 948
 949 struct ecore_consq *ecore_consq_alloc(struct ecore_hwfn *p_hwfn)
 950 {
 951         struct ecore_consq *p_consq;
 952
 953         /* Allocate ConsQ struct */
 954         p_consq =
 955             OSAL_ZALLOC(p_hwfn->p_dev, GFP_KERNEL, sizeof(*p_consq));
 956         if (!p_consq) {
 957                 DP_NOTICE(p_hwfn, true,
 958                           "Failed to allocate `struct ecore_consq'\n");
 959                 return OSAL_NULL;
 960         }
 961
 962         /* Allocate and initialize EQ chain */
 963         if (ecore_chain_alloc(p_hwfn->p_dev,
 964                               ECORE_CHAIN_USE_TO_PRODUCE,
 965                               ECORE_CHAIN_MODE_PBL,
 966                               ECORE_CHAIN_CNT_TYPE_U16,
 967                               ECORE_CHAIN_PAGE_SIZE / 0x80,
 968                               0x80,
 969                               &p_consq->chain, OSAL_NULL)) {
 970                 DP_NOTICE(p_hwfn, true, "Failed to allocate consq chain");
 971                 goto consq_allocate_fail;
 972         }
 973
 974         return p_consq;
 975
 976 consq_allocate_fail:
 977         ecore_consq_free(p_hwfn, p_consq);
 978         return OSAL_NULL;
 979 }
 980
 981 void ecore_consq_setup(struct ecore_hwfn *p_hwfn, struct ecore_consq *p_consq)
 982 {
 983         ecore_chain_reset(&p_consq->chain);
 984 }
 985
 986 void ecore_consq_free(struct ecore_hwfn *p_hwfn, struct ecore_consq *p_consq)
 987 {
 988         if (!p_consq)
 989                 return;
 990         ecore_chain_free(p_hwfn->p_dev, &p_consq->chain);
 991         OSAL_FREE(p_hwfn->p_dev, p_consq);
 992 }