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         struct ecore_cxt_info cxt_info;
 177         struct core_conn_context *p_cxt;
 178         enum _ecore_status_t rc;
 179         u16 physical_q;
 180
 181         cxt_info.iid = p_spq->cid;
 182
 183         rc = ecore_cxt_get_cid_info(p_hwfn, &cxt_info);
 184
 185         if (rc < 0) {
 186                 DP_NOTICE(p_hwfn, true, "Cannot find context info for cid=%d\n",
 187                           p_spq->cid);
 188                 return;
 189         }
 190
 191         p_cxt = cxt_info.p_cxt;
 192
 193         if (ECORE_IS_BB(p_hwfn->p_dev) || ECORE_IS_AH(p_hwfn->p_dev)) {
 194                 SET_FIELD(p_cxt->xstorm_ag_context.flags10,
 195                           E4_XSTORM_CORE_CONN_AG_CTX_DQ_CF_EN, 1);
 196                 SET_FIELD(p_cxt->xstorm_ag_context.flags1,
 197                           E4_XSTORM_CORE_CONN_AG_CTX_DQ_CF_ACTIVE, 1);
 198                 /* SET_FIELD(p_cxt->xstorm_ag_context.flags10,
 199                  *        E4_XSTORM_CORE_CONN_AG_CTX_SLOW_PATH_EN, 1);
 200                  */
 201                 SET_FIELD(p_cxt->xstorm_ag_context.flags9,
 202                           E4_XSTORM_CORE_CONN_AG_CTX_CONSOLID_PROD_CF_EN, 1);
 203         }
 204
 205         /* CDU validation - FIXME currently disabled */
 206
 207         /* QM physical queue */
 208         physical_q = ecore_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB);
 209         p_cxt->xstorm_ag_context.physical_q0 = OSAL_CPU_TO_LE16(physical_q);
 210
 211         p_cxt->xstorm_st_context.spq_base_lo =
 212             DMA_LO_LE(p_spq->chain.p_phys_addr);
 213         p_cxt->xstorm_st_context.spq_base_hi =
 214             DMA_HI_LE(p_spq->chain.p_phys_addr);
 215
 216         DMA_REGPAIR_LE(p_cxt->xstorm_st_context.consolid_base_addr,
 217                        p_hwfn->p_consq->chain.p_phys_addr);
 218 }
 219
 220 static enum _ecore_status_t ecore_spq_hw_post(struct ecore_hwfn *p_hwfn,
 221                                               struct ecore_spq *p_spq,
 222                                               struct ecore_spq_entry *p_ent)
 223 {
 224         struct ecore_chain *p_chain = &p_hwfn->p_spq->chain;
 225         u16 echo = ecore_chain_get_prod_idx(p_chain);
 226         struct slow_path_element *elem;
 227         struct core_db_data db;
 228
 229         p_ent->elem.hdr.echo = OSAL_CPU_TO_LE16(echo);
 230         elem = ecore_chain_produce(p_chain);
 231         if (!elem) {
 232                 DP_NOTICE(p_hwfn, true, "Failed to produce from SPQ chain\n");
 233                 return ECORE_INVAL;
 234         }
 235
 236         *elem = p_ent->elem;    /* struct assignment */
 237
 238         /* send a doorbell on the slow hwfn session */
 239         OSAL_MEMSET(&db, 0, sizeof(db));
 240         SET_FIELD(db.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
 241         SET_FIELD(db.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET);
 242         SET_FIELD(db.params, CORE_DB_DATA_AGG_VAL_SEL,
 243                   DQ_XCM_CORE_SPQ_PROD_CMD);
 244         db.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
 245         db.spq_prod = OSAL_CPU_TO_LE16(ecore_chain_get_prod_idx(p_chain));
 246
 247         /* make sure the SPQE is updated before the doorbell */
 248         OSAL_WMB(p_hwfn->p_dev);
 249
 250         DOORBELL(p_hwfn, DB_ADDR(p_spq->cid, DQ_DEMS_LEGACY),
 251                  *(u32 *)&db);
 252
 253         /* make sure doorbell is rang */
 254         OSAL_WMB(p_hwfn->p_dev);
 255
 256         DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 257                    "Doorbelled [0x%08x, CID 0x%08x] with Flags: %02x"
 258                    " agg_params: %02x, prod: %04x\n",
 259                    DB_ADDR(p_spq->cid, DQ_DEMS_LEGACY), p_spq->cid, db.params,
 260                    db.agg_flags, ecore_chain_get_prod_idx(p_chain));
 261
 262         return ECORE_SUCCESS;
 263 }
 264
 265 /***************************************************************************
 266  * Asynchronous events
 267  ***************************************************************************/
 268
 269 static enum _ecore_status_t
 270 ecore_async_event_completion(struct ecore_hwfn *p_hwfn,
 271                              struct event_ring_entry *p_eqe)
 272 {
 273         switch (p_eqe->protocol_id) {
 274         case PROTOCOLID_COMMON:
 275                 return ecore_sriov_eqe_event(p_hwfn,
 276                                              p_eqe->opcode,
 277                                              p_eqe->echo, &p_eqe->data);
 278         default:
 279                 DP_NOTICE(p_hwfn,
 280                           true, "Unknown Async completion for protocol: %d\n",
 281                           p_eqe->protocol_id);
 282                 return ECORE_INVAL;
 283         }
 284 }
 285
 286 /***************************************************************************
 287  * EQ API
 288  ***************************************************************************/
 289 void ecore_eq_prod_update(struct ecore_hwfn *p_hwfn, u16 prod)
 290 {
 291         u32 addr = GTT_BAR0_MAP_REG_USDM_RAM +
 292             USTORM_EQE_CONS_OFFSET(p_hwfn->rel_pf_id);
 293
 294         REG_WR16(p_hwfn, addr, prod);
 295
 296         /* keep prod updates ordered */
 297         OSAL_MMIOWB(p_hwfn->p_dev);
 298 }
 299
 300 enum _ecore_status_t ecore_eq_completion(struct ecore_hwfn *p_hwfn,
 301                                          void *cookie)
 302 {
 303         struct ecore_eq *p_eq = cookie;
 304         struct ecore_chain *p_chain = &p_eq->chain;
 305         enum _ecore_status_t rc = 0;
 306
 307         /* take a snapshot of the FW consumer */
 308         u16 fw_cons_idx = OSAL_LE16_TO_CPU(*p_eq->p_fw_cons);
 309
 310         DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ, "fw_cons_idx %x\n", fw_cons_idx);
 311
 312         /* Need to guarantee the fw_cons index we use points to a usuable
 313          * element (to comply with our chain), so our macros would comply
 314          */
 315         if ((fw_cons_idx & ecore_chain_get_usable_per_page(p_chain)) ==
 316             ecore_chain_get_usable_per_page(p_chain)) {
 317                 fw_cons_idx += ecore_chain_get_unusable_per_page(p_chain);
 318         }
 319
 320         /* Complete current segment of eq entries */
 321         while (fw_cons_idx != ecore_chain_get_cons_idx(p_chain)) {
 322                 struct event_ring_entry *p_eqe = ecore_chain_consume(p_chain);
 323                 if (!p_eqe) {
 324                         rc = ECORE_INVAL;
 325                         break;
 326                 }
 327
 328                 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 329                            "op %x prot %x res0 %x echo %x fwret %x flags %x\n",
 330                            p_eqe->opcode,            /* Event Opcode */
 331                            p_eqe->protocol_id,  /* Event Protocol ID */
 332                            p_eqe->reserved0,    /* Reserved */
 333                            /* Echo value from ramrod data on the host */
 334                            OSAL_LE16_TO_CPU(p_eqe->echo),
 335                            p_eqe->fw_return_code,    /* FW return code for SP
 336                                                       * ramrods
 337                                                       */
 338                            p_eqe->flags);
 339
 340                 if (GET_FIELD(p_eqe->flags, EVENT_RING_ENTRY_ASYNC)) {
 341                         if (ecore_async_event_completion(p_hwfn, p_eqe))
 342                                 rc = ECORE_INVAL;
 343                 } else if (ecore_spq_completion(p_hwfn,
 344                                                 p_eqe->echo,
 345                                                 p_eqe->fw_return_code,
 346                                                 &p_eqe->data)) {
 347                         rc = ECORE_INVAL;
 348                 }
 349
 350                 ecore_chain_recycle_consumed(p_chain);
 351         }
 352
 353         ecore_eq_prod_update(p_hwfn, ecore_chain_get_prod_idx(p_chain));
 354
 355         return rc;
 356 }
 357
 358 enum _ecore_status_t ecore_eq_alloc(struct ecore_hwfn *p_hwfn, u16 num_elem)
 359 {
 360         struct ecore_eq *p_eq;
 361
 362         /* Allocate EQ struct */
 363         p_eq = OSAL_ZALLOC(p_hwfn->p_dev, GFP_KERNEL, sizeof(*p_eq));
 364         if (!p_eq) {
 365                 DP_NOTICE(p_hwfn, true,
 366                           "Failed to allocate `struct ecore_eq'\n");
 367                 return ECORE_NOMEM;
 368         }
 369
 370         /* Allocate and initialize EQ chain*/
 371         if (ecore_chain_alloc(p_hwfn->p_dev,
 372                               ECORE_CHAIN_USE_TO_PRODUCE,
 373                               ECORE_CHAIN_MODE_PBL,
 374                               ECORE_CHAIN_CNT_TYPE_U16,
 375                               num_elem,
 376                               sizeof(union event_ring_element),
 377                               &p_eq->chain, OSAL_NULL) != ECORE_SUCCESS) {
 378                 DP_NOTICE(p_hwfn, true, "Failed to allocate eq chain\n");
 379                 goto eq_allocate_fail;
 380         }
 381
 382         /* register EQ completion on the SP SB */
 383         ecore_int_register_cb(p_hwfn, ecore_eq_completion,
 384                               p_eq, &p_eq->eq_sb_index, &p_eq->p_fw_cons);
 385
 386         p_hwfn->p_eq = p_eq;
 387         return ECORE_SUCCESS;
 388
 389 eq_allocate_fail:
 390         OSAL_FREE(p_hwfn->p_dev, p_eq);
 391         return ECORE_NOMEM;
 392 }
 393
 394 void ecore_eq_setup(struct ecore_hwfn *p_hwfn)
 395 {
 396         ecore_chain_reset(&p_hwfn->p_eq->chain);
 397 }
 398
 399 void ecore_eq_free(struct ecore_hwfn *p_hwfn)
 400 {
 401         if (!p_hwfn->p_eq)
 402                 return;
 403
 404         ecore_chain_free(p_hwfn->p_dev, &p_hwfn->p_eq->chain);
 405
 406         OSAL_FREE(p_hwfn->p_dev, p_hwfn->p_eq);
 407         p_hwfn->p_eq = OSAL_NULL;
 408 }
 409
 410 /***************************************************************************
 411 * CQE API - manipulate EQ functionality
 412 ***************************************************************************/
 413 static enum _ecore_status_t ecore_cqe_completion(struct ecore_hwfn *p_hwfn,
 414                                                  struct eth_slow_path_rx_cqe
 415                                                  *cqe,
 416                                                  enum protocol_type protocol)
 417 {
 418         if (IS_VF(p_hwfn->p_dev))
 419                 return OSAL_VF_CQE_COMPLETION(p_hwfn, cqe, protocol);
 420
 421         /* @@@tmp - it's possible we'll eventually want to handle some
 422          * actual commands that can arrive here, but for now this is only
 423          * used to complete the ramrod using the echo value on the cqe
 424          */
 425         return ecore_spq_completion(p_hwfn, cqe->echo, 0, OSAL_NULL);
 426 }
 427
 428 enum _ecore_status_t ecore_eth_cqe_completion(struct ecore_hwfn *p_hwfn,
 429                                               struct eth_slow_path_rx_cqe *cqe)
 430 {
 431         enum _ecore_status_t rc;
 432
 433         rc = ecore_cqe_completion(p_hwfn, cqe, PROTOCOLID_ETH);
 434         if (rc) {
 435                 DP_NOTICE(p_hwfn, true,
 436                           "Failed to handle RXQ CQE [cmd 0x%02x]\n",
 437                           cqe->ramrod_cmd_id);
 438         }
 439
 440         return rc;
 441 }
 442
 443 /***************************************************************************
 444  * Slow hwfn Queue (spq)
 445  ***************************************************************************/
 446 void ecore_spq_setup(struct ecore_hwfn *p_hwfn)
 447 {
 448         struct ecore_spq *p_spq = p_hwfn->p_spq;
 449         struct ecore_spq_entry *p_virt = OSAL_NULL;
 450         dma_addr_t p_phys = 0;
 451         u32 i, capacity;
 452
 453         OSAL_LIST_INIT(&p_spq->pending);
 454         OSAL_LIST_INIT(&p_spq->completion_pending);
 455         OSAL_LIST_INIT(&p_spq->free_pool);
 456         OSAL_LIST_INIT(&p_spq->unlimited_pending);
 457         OSAL_SPIN_LOCK_INIT(&p_spq->lock);
 458
 459         /* SPQ empty pool */
 460         p_phys = p_spq->p_phys + OFFSETOF(struct ecore_spq_entry, ramrod);
 461         p_virt = p_spq->p_virt;
 462
 463         capacity = ecore_chain_get_capacity(&p_spq->chain);
 464         for (i = 0; i < capacity; i++) {
 465                 DMA_REGPAIR_LE(p_virt->elem.data_ptr, p_phys);
 466
 467                 OSAL_LIST_PUSH_TAIL(&p_virt->list, &p_spq->free_pool);
 468
 469                 p_virt++;
 470                 p_phys += sizeof(struct ecore_spq_entry);
 471         }
 472
 473         /* Statistics */
 474         p_spq->normal_count = 0;
 475         p_spq->comp_count = 0;
 476         p_spq->comp_sent_count = 0;
 477         p_spq->unlimited_pending_count = 0;
 478
 479         OSAL_MEM_ZERO(p_spq->p_comp_bitmap,
 480                       SPQ_COMP_BMAP_SIZE * sizeof(unsigned long));
 481         p_spq->comp_bitmap_idx = 0;
 482
 483         /* SPQ cid, cannot fail */
 484         ecore_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_spq->cid);
 485         ecore_spq_hw_initialize(p_hwfn, p_spq);
 486
 487         /* reset the chain itself */
 488         ecore_chain_reset(&p_spq->chain);
 489 }
 490
 491 enum _ecore_status_t ecore_spq_alloc(struct ecore_hwfn *p_hwfn)
 492 {
 493         struct ecore_spq_entry *p_virt = OSAL_NULL;
 494         struct ecore_spq *p_spq = OSAL_NULL;
 495         dma_addr_t p_phys = 0;
 496         u32 capacity;
 497
 498         /* SPQ struct */
 499         p_spq =
 500             OSAL_ZALLOC(p_hwfn->p_dev, GFP_KERNEL, sizeof(struct ecore_spq));
 501         if (!p_spq) {
 502                 DP_NOTICE(p_hwfn, true,
 503                           "Failed to allocate `struct ecore_spq'\n");
 504                 return ECORE_NOMEM;
 505         }
 506
 507         /* SPQ ring  */
 508         if (ecore_chain_alloc(p_hwfn->p_dev,
 509                               ECORE_CHAIN_USE_TO_PRODUCE,
 510                               ECORE_CHAIN_MODE_SINGLE,
 511                               ECORE_CHAIN_CNT_TYPE_U16,
 512                               0, /* N/A when the mode is SINGLE */
 513                               sizeof(struct slow_path_element),
 514                               &p_spq->chain, OSAL_NULL)) {
 515                 DP_NOTICE(p_hwfn, true, "Failed to allocate spq chain\n");
 516                 goto spq_allocate_fail;
 517         }
 518
 519         /* allocate and fill the SPQ elements (incl. ramrod data list) */
 520         capacity = ecore_chain_get_capacity(&p_spq->chain);
 521         p_virt = OSAL_DMA_ALLOC_COHERENT(p_hwfn->p_dev, &p_phys,
 522                                          capacity *
 523                                          sizeof(struct ecore_spq_entry));
 524         if (!p_virt)
 525                 goto spq_allocate_fail;
 526
 527         p_spq->p_virt = p_virt;
 528         p_spq->p_phys = p_phys;
 529
 530         OSAL_SPIN_LOCK_ALLOC(p_hwfn, &p_spq->lock);
 531
 532         p_hwfn->p_spq = p_spq;
 533         return ECORE_SUCCESS;
 534
 535 spq_allocate_fail:
 536         ecore_chain_free(p_hwfn->p_dev, &p_spq->chain);
 537         OSAL_FREE(p_hwfn->p_dev, p_spq);
 538         return ECORE_NOMEM;
 539 }
 540
 541 void ecore_spq_free(struct ecore_hwfn *p_hwfn)
 542 {
 543         struct ecore_spq *p_spq = p_hwfn->p_spq;
 544         u32 capacity;
 545
 546         if (!p_spq)
 547                 return;
 548
 549         if (p_spq->p_virt) {
 550                 capacity = ecore_chain_get_capacity(&p_spq->chain);
 551                 OSAL_DMA_FREE_COHERENT(p_hwfn->p_dev,
 552                                        p_spq->p_virt,
 553                                        p_spq->p_phys,
 554                                        capacity *
 555                                        sizeof(struct ecore_spq_entry));
 556         }
 557
 558         ecore_chain_free(p_hwfn->p_dev, &p_spq->chain);
 559         OSAL_SPIN_LOCK_DEALLOC(&p_spq->lock);
 560         OSAL_FREE(p_hwfn->p_dev, p_spq);
 561 }
 562
 563 enum _ecore_status_t
 564 ecore_spq_get_entry(struct ecore_hwfn *p_hwfn, struct ecore_spq_entry **pp_ent)
 565 {
 566         struct ecore_spq *p_spq = p_hwfn->p_spq;
 567         struct ecore_spq_entry *p_ent = OSAL_NULL;
 568         enum _ecore_status_t rc = ECORE_SUCCESS;
 569
 570         OSAL_SPIN_LOCK(&p_spq->lock);
 571
 572         if (OSAL_LIST_IS_EMPTY(&p_spq->free_pool)) {
 573                 p_ent = OSAL_ZALLOC(p_hwfn->p_dev, GFP_ATOMIC, sizeof(*p_ent));
 574                 if (!p_ent) {
 575                         DP_NOTICE(p_hwfn, true,
 576                                  "Failed to allocate an SPQ entry for a pending"
 577                                  " ramrod\n");
 578                         rc = ECORE_NOMEM;
 579                         goto out_unlock;
 580                 }
 581                 p_ent->queue = &p_spq->unlimited_pending;
 582         } else {
 583                 p_ent = OSAL_LIST_FIRST_ENTRY(&p_spq->free_pool,
 584                                               struct ecore_spq_entry, list);
 585                 OSAL_LIST_REMOVE_ENTRY(&p_ent->list, &p_spq->free_pool);
 586                 p_ent->queue = &p_spq->pending;
 587         }
 588
 589         *pp_ent = p_ent;
 590
 591 out_unlock:
 592         OSAL_SPIN_UNLOCK(&p_spq->lock);
 593         return rc;
 594 }
 595
 596 /* Locked variant; Should be called while the SPQ lock is taken */
 597 static void __ecore_spq_return_entry(struct ecore_hwfn *p_hwfn,
 598                                      struct ecore_spq_entry *p_ent)
 599 {
 600         OSAL_LIST_PUSH_TAIL(&p_ent->list, &p_hwfn->p_spq->free_pool);
 601 }
 602
 603 void ecore_spq_return_entry(struct ecore_hwfn *p_hwfn,
 604                             struct ecore_spq_entry *p_ent)
 605 {
 606         OSAL_SPIN_LOCK(&p_hwfn->p_spq->lock);
 607         __ecore_spq_return_entry(p_hwfn, p_ent);
 608         OSAL_SPIN_UNLOCK(&p_hwfn->p_spq->lock);
 609 }
 610
 611 /**
 612  * @brief ecore_spq_add_entry - adds a new entry to the pending
 613  *        list. Should be used while lock is being held.
 614  *
 615  * Addes an entry to the pending list is there is room (en empty
 616  * element is available in the free_pool), or else places the
 617  * entry in the unlimited_pending pool.
 618  *
 619  * @param p_hwfn
 620  * @param p_ent
 621  * @param priority
 622  *
 623  * @return enum _ecore_status_t
 624  */
 625 static enum _ecore_status_t
 626 ecore_spq_add_entry(struct ecore_hwfn *p_hwfn,
 627                     struct ecore_spq_entry *p_ent, enum spq_priority priority)
 628 {
 629         struct ecore_spq *p_spq = p_hwfn->p_spq;
 630
 631         if (p_ent->queue == &p_spq->unlimited_pending) {
 632                 if (OSAL_LIST_IS_EMPTY(&p_spq->free_pool)) {
 633                         OSAL_LIST_PUSH_TAIL(&p_ent->list,
 634                                             &p_spq->unlimited_pending);
 635                         p_spq->unlimited_pending_count++;
 636
 637                         return ECORE_SUCCESS;
 638
 639                 } else {
 640                         struct ecore_spq_entry *p_en2;
 641
 642                         p_en2 = OSAL_LIST_FIRST_ENTRY(&p_spq->free_pool,
 643                                                      struct ecore_spq_entry,
 644                                                      list);
 645                         OSAL_LIST_REMOVE_ENTRY(&p_en2->list, &p_spq->free_pool);
 646
 647                         /* Copy the ring element physical pointer to the new
 648                          * entry, since we are about to override the entire ring
 649                          * entry and don't want to lose the pointer.
 650                          */
 651                         p_ent->elem.data_ptr = p_en2->elem.data_ptr;
 652
 653                         *p_en2 = *p_ent;
 654
 655                         /* EBLOCK responsible to free the allocated p_ent */
 656                         if (p_ent->comp_mode != ECORE_SPQ_MODE_EBLOCK)
 657                                 OSAL_FREE(p_hwfn->p_dev, p_ent);
 658
 659                         p_ent = p_en2;
 660                 }
 661         }
 662
 663         /* entry is to be placed in 'pending' queue */
 664         switch (priority) {
 665         case ECORE_SPQ_PRIORITY_NORMAL:
 666                 OSAL_LIST_PUSH_TAIL(&p_ent->list, &p_spq->pending);
 667                 p_spq->normal_count++;
 668                 break;
 669         case ECORE_SPQ_PRIORITY_HIGH:
 670                 OSAL_LIST_PUSH_HEAD(&p_ent->list, &p_spq->pending);
 671                 p_spq->high_count++;
 672                 break;
 673         default:
 674                 return ECORE_INVAL;
 675         }
 676
 677         return ECORE_SUCCESS;
 678 }
 679
 680 /***************************************************************************
 681  * Accessor
 682  ***************************************************************************/
 683
 684 u32 ecore_spq_get_cid(struct ecore_hwfn *p_hwfn)
 685 {
 686         if (!p_hwfn->p_spq)
 687                 return 0xffffffff;      /* illegal */
 688         return p_hwfn->p_spq->cid;
 689 }
 690
 691 /***************************************************************************
 692  * Posting new Ramrods
 693  ***************************************************************************/
 694
 695 static enum _ecore_status_t ecore_spq_post_list(struct ecore_hwfn *p_hwfn,
 696                                                 osal_list_t *head,
 697                                                 u32 keep_reserve)
 698 {
 699         struct ecore_spq *p_spq = p_hwfn->p_spq;
 700         enum _ecore_status_t rc;
 701
 702         /* TODO - implementation might be wasteful; will always keep room
 703          * for an additional high priority ramrod (even if one is already
 704          * pending FW)
 705          */
 706         while (ecore_chain_get_elem_left(&p_spq->chain) > keep_reserve &&
 707                !OSAL_LIST_IS_EMPTY(head)) {
 708                 struct ecore_spq_entry *p_ent =
 709                     OSAL_LIST_FIRST_ENTRY(head, struct ecore_spq_entry, list);
 710                 if (p_ent != OSAL_NULL) {
 711 #if defined(_NTDDK_)
 712 #pragma warning(suppress : 6011 28182)
 713 #endif
 714                         OSAL_LIST_REMOVE_ENTRY(&p_ent->list, head);
 715                         OSAL_LIST_PUSH_TAIL(&p_ent->list,
 716                                             &p_spq->completion_pending);
 717                         p_spq->comp_sent_count++;
 718
 719                         rc = ecore_spq_hw_post(p_hwfn, p_spq, p_ent);
 720                         if (rc) {
 721                                 OSAL_LIST_REMOVE_ENTRY(&p_ent->list,
 722                                                     &p_spq->completion_pending);
 723                                 __ecore_spq_return_entry(p_hwfn, p_ent);
 724                                 return rc;
 725                         }
 726                 }
 727         }
 728
 729         return ECORE_SUCCESS;
 730 }
 731
 732 static enum _ecore_status_t ecore_spq_pend_post(struct ecore_hwfn *p_hwfn)
 733 {
 734         struct ecore_spq *p_spq = p_hwfn->p_spq;
 735         struct ecore_spq_entry *p_ent = OSAL_NULL;
 736
 737         while (!OSAL_LIST_IS_EMPTY(&p_spq->free_pool)) {
 738                 if (OSAL_LIST_IS_EMPTY(&p_spq->unlimited_pending))
 739                         break;
 740
 741                 p_ent = OSAL_LIST_FIRST_ENTRY(&p_spq->unlimited_pending,
 742                                               struct ecore_spq_entry, list);
 743                 if (!p_ent)
 744                         return ECORE_INVAL;
 745
 746 #if defined(_NTDDK_)
 747 #pragma warning(suppress : 6011)
 748 #endif
 749                 OSAL_LIST_REMOVE_ENTRY(&p_ent->list, &p_spq->unlimited_pending);
 750
 751                 ecore_spq_add_entry(p_hwfn, p_ent, p_ent->priority);
 752         }
 753
 754         return ecore_spq_post_list(p_hwfn,
 755                                  &p_spq->pending, SPQ_HIGH_PRI_RESERVE_DEFAULT);
 756 }
 757
 758 enum _ecore_status_t ecore_spq_post(struct ecore_hwfn *p_hwfn,
 759                                     struct ecore_spq_entry *p_ent,
 760                                     u8 *fw_return_code)
 761 {
 762         enum _ecore_status_t rc = ECORE_SUCCESS;
 763         struct ecore_spq *p_spq = p_hwfn ? p_hwfn->p_spq : OSAL_NULL;
 764         bool b_ret_ent = true;
 765
 766         if (!p_hwfn)
 767                 return ECORE_INVAL;
 768
 769         if (!p_ent) {
 770                 DP_NOTICE(p_hwfn, true, "Got a NULL pointer\n");
 771                 return ECORE_INVAL;
 772         }
 773
 774         if (p_hwfn->p_dev->recov_in_prog) {
 775                 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 776                            "Recovery is in progress -> skip spq post"
 777                            " [cmd %02x protocol %02x]\n",
 778                            p_ent->elem.hdr.cmd_id, p_ent->elem.hdr.protocol_id);
 779                 /* Return success to let the flows to be completed successfully
 780                  * w/o any error handling.
 781                  */
 782                 return ECORE_SUCCESS;
 783         }
 784
 785         OSAL_SPIN_LOCK(&p_spq->lock);
 786
 787         /* Complete the entry */
 788         rc = ecore_spq_fill_entry(p_hwfn, p_ent);
 789
 790         /* Check return value after LOCK is taken for cleaner error flow */
 791         if (rc)
 792                 goto spq_post_fail;
 793
 794         /* Add the request to the pending queue */
 795         rc = ecore_spq_add_entry(p_hwfn, p_ent, p_ent->priority);
 796         if (rc)
 797                 goto spq_post_fail;
 798
 799         rc = ecore_spq_pend_post(p_hwfn);
 800         if (rc) {
 801                 /* Since it's possible that pending failed for a different
 802                  * entry [although unlikely], the failed entry was already
 803                  * dealt with; No need to return it here.
 804                  */
 805                 b_ret_ent = false;
 806                 goto spq_post_fail;
 807         }
 808
 809         OSAL_SPIN_UNLOCK(&p_spq->lock);
 810
 811         if (p_ent->comp_mode == ECORE_SPQ_MODE_EBLOCK) {
 812                 /* For entries in ECORE BLOCK mode, the completion code cannot
 813                  * perform the necessary cleanup - if it did, we couldn't
 814                  * access p_ent here to see whether it's successful or not.
 815                  * Thus, after gaining the answer perform the cleanup here.
 816                  */
 817                 rc = ecore_spq_block(p_hwfn, p_ent, fw_return_code,
 818                                      p_ent->queue == &p_spq->unlimited_pending);
 819
 820                 if (p_ent->queue == &p_spq->unlimited_pending) {
 821                         /* This is an allocated p_ent which does not need to
 822                          * return to pool.
 823                          */
 824                         OSAL_FREE(p_hwfn->p_dev, p_ent);
 825
 826                         /* TBD: handle error flow and remove p_ent from
 827                          * completion pending
 828                          */
 829                         return rc;
 830                 }
 831
 832                 if (rc)
 833                         goto spq_post_fail2;
 834
 835                 /* return to pool */
 836                 ecore_spq_return_entry(p_hwfn, p_ent);
 837         }
 838         return rc;
 839
 840 spq_post_fail2:
 841         OSAL_SPIN_LOCK(&p_spq->lock);
 842         OSAL_LIST_REMOVE_ENTRY(&p_ent->list, &p_spq->completion_pending);
 843         ecore_chain_return_produced(&p_spq->chain);
 844
 845 spq_post_fail:
 846         /* return to the free pool */
 847         if (b_ret_ent)
 848                 __ecore_spq_return_entry(p_hwfn, p_ent);
 849         OSAL_SPIN_UNLOCK(&p_spq->lock);
 850
 851         return rc;
 852 }
 853
 854 enum _ecore_status_t ecore_spq_completion(struct ecore_hwfn *p_hwfn,
 855                                           __le16 echo,
 856                                           u8 fw_return_code,
 857                                           union event_ring_data *p_data)
 858 {
 859         struct ecore_spq *p_spq;
 860         struct ecore_spq_entry *p_ent = OSAL_NULL;
 861         struct ecore_spq_entry *tmp;
 862         struct ecore_spq_entry *found = OSAL_NULL;
 863         enum _ecore_status_t rc;
 864
 865         if (!p_hwfn)
 866                 return ECORE_INVAL;
 867
 868         p_spq = p_hwfn->p_spq;
 869         if (!p_spq)
 870                 return ECORE_INVAL;
 871
 872         OSAL_SPIN_LOCK(&p_spq->lock);
 873         OSAL_LIST_FOR_EACH_ENTRY_SAFE(p_ent,
 874                                       tmp,
 875                                       &p_spq->completion_pending,
 876                                       list, struct ecore_spq_entry) {
 877                 if (p_ent->elem.hdr.echo == echo) {
 878                         OSAL_LIST_REMOVE_ENTRY(&p_ent->list,
 879                                                &p_spq->completion_pending);
 880
 881                         /* Avoid overriding of SPQ entries when getting
 882                          * out-of-order completions, by marking the completions
 883                          * in a bitmap and increasing the chain consumer only
 884                          * for the first successive completed entries.
 885                          */
 886                         SPQ_COMP_BMAP_SET_BIT(p_spq, echo);
 887                         while (SPQ_COMP_BMAP_TEST_BIT(p_spq,
 888                                                       p_spq->comp_bitmap_idx)) {
 889                                 SPQ_COMP_BMAP_CLEAR_BIT(p_spq,
 890                                                         p_spq->comp_bitmap_idx);
 891                                 p_spq->comp_bitmap_idx++;
 892                                 ecore_chain_return_produced(&p_spq->chain);
 893                         }
 894
 895                         p_spq->comp_count++;
 896                         found = p_ent;
 897                         break;
 898                 }
 899
 900                 /* This is debug and should be relatively uncommon - depends
 901                  * on scenarios which have mutliple per-PF sent ramrods.
 902                  */
 903                 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 904                            "Got completion for echo %04x - doesn't match"
 905                            " echo %04x in completion pending list\n",
 906                            OSAL_LE16_TO_CPU(echo),
 907                            OSAL_LE16_TO_CPU(p_ent->elem.hdr.echo));
 908         }
 909
 910         /* Release lock before callback, as callback may post
 911          * an additional ramrod.
 912          */
 913         OSAL_SPIN_UNLOCK(&p_spq->lock);
 914
 915         if (!found) {
 916                 DP_NOTICE(p_hwfn, true,
 917                           "Failed to find an entry this"
 918                           " EQE [echo %04x] completes\n",
 919                           OSAL_LE16_TO_CPU(echo));
 920                 return ECORE_EXISTS;
 921         }
 922
 923         DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 924                    "Complete EQE [echo %04x]: func %p cookie %p)\n",
 925                    OSAL_LE16_TO_CPU(echo),
 926                    p_ent->comp_cb.function, p_ent->comp_cb.cookie);
 927         if (found->comp_cb.function)
 928                 found->comp_cb.function(p_hwfn, found->comp_cb.cookie, p_data,
 929                                         fw_return_code);
 930         else
 931                 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 932                            "Got a completion without a callback function\n");
 933
 934         if ((found->comp_mode != ECORE_SPQ_MODE_EBLOCK) ||
 935             (found->queue == &p_spq->unlimited_pending))
 936                 /* EBLOCK  is responsible for returning its own entry into the
 937                  * free list, unless it originally added the entry into the
 938                  * unlimited pending list.
 939                  */
 940                 ecore_spq_return_entry(p_hwfn, found);
 941
 942         /* Attempt to post pending requests */
 943         OSAL_SPIN_LOCK(&p_spq->lock);
 944         rc = ecore_spq_pend_post(p_hwfn);
 945         OSAL_SPIN_UNLOCK(&p_spq->lock);
 946
 947         return rc;
 948 }
 949
 950 enum _ecore_status_t ecore_consq_alloc(struct ecore_hwfn *p_hwfn)
 951 {
 952         struct ecore_consq *p_consq;
 953
 954         /* Allocate ConsQ struct */
 955         p_consq =
 956             OSAL_ZALLOC(p_hwfn->p_dev, GFP_KERNEL, sizeof(*p_consq));
 957         if (!p_consq) {
 958                 DP_NOTICE(p_hwfn, true,
 959                           "Failed to allocate `struct ecore_consq'\n");
 960                 return ECORE_NOMEM;
 961         }
 962
 963         /* Allocate and initialize EQ chain */
 964         if (ecore_chain_alloc(p_hwfn->p_dev,
 965                               ECORE_CHAIN_USE_TO_PRODUCE,
 966                               ECORE_CHAIN_MODE_PBL,
 967                               ECORE_CHAIN_CNT_TYPE_U16,
 968                               ECORE_CHAIN_PAGE_SIZE / 0x80,
 969                               0x80,
 970                               &p_consq->chain, OSAL_NULL) != ECORE_SUCCESS) {
 971                 DP_NOTICE(p_hwfn, true, "Failed to allocate consq chain");
 972                 goto consq_allocate_fail;
 973         }
 974
 975         p_hwfn->p_consq = p_consq;
 976         return ECORE_SUCCESS;
 977
 978 consq_allocate_fail:
 979         OSAL_FREE(p_hwfn->p_dev, p_consq);
 980         return ECORE_NOMEM;
 981 }
 982
 983 void ecore_consq_setup(struct ecore_hwfn *p_hwfn)
 984 {
 985         ecore_chain_reset(&p_hwfn->p_consq->chain);
 986 }
 987
 988 void ecore_consq_free(struct ecore_hwfn *p_hwfn)
 989 {
 990         if (!p_hwfn->p_consq)
 991                 return;
 992
 993         ecore_chain_free(p_hwfn->p_dev, &p_hwfn->p_consq->chain);
 994         OSAL_FREE(p_hwfn->p_dev, p_hwfn->p_consq);
 995 }