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         struct ecore_ptt *p_ptt;
  91         enum _ecore_status_t rc;
  92
  93         /* A relatively short polling period w/o sleeping, to allow the FW to
  94          * complete the ramrod and thus possibly to avoid the following sleeps.
  95          */
  96         if (!skip_quick_poll) {
  97                 rc = __ecore_spq_block(p_hwfn, p_ent, p_fw_ret, false);
  98                 if (rc == ECORE_SUCCESS)
  99                         return ECORE_SUCCESS;
 100         }
 101
 102         /* Move to polling with a sleeping period between iterations */
 103         rc = __ecore_spq_block(p_hwfn, p_ent, p_fw_ret, true);
 104         if (rc == ECORE_SUCCESS)
 105                 return ECORE_SUCCESS;
 106
 107         p_ptt = ecore_ptt_acquire(p_hwfn);
 108         if (!p_ptt)
 109                 return ECORE_AGAIN;
 110
 111         DP_INFO(p_hwfn, "Ramrod is stuck, requesting MCP drain\n");
 112         rc = ecore_mcp_drain(p_hwfn, p_ptt);
 113         ecore_ptt_release(p_hwfn, p_ptt);
 114         if (rc != ECORE_SUCCESS) {
 115                 DP_NOTICE(p_hwfn, true, "MCP drain failed\n");
 116                 goto err;
 117         }
 118
 119         /* Retry after drain */
 120         rc = __ecore_spq_block(p_hwfn, p_ent, p_fw_ret, true);
 121         if (rc == ECORE_SUCCESS)
 122                 return ECORE_SUCCESS;
 123
 124         comp_done = (struct ecore_spq_comp_done *)p_ent->comp_cb.cookie;
 125         if (comp_done->done == 1) {
 126                 if (p_fw_ret)
 127                         *p_fw_ret = comp_done->fw_return_code;
 128                 return ECORE_SUCCESS;
 129         }
 130 err:
 131         DP_NOTICE(p_hwfn, true,
 132                   "Ramrod is stuck [CID %08x cmd %02x proto %02x echo %04x]\n",
 133                   OSAL_LE32_TO_CPU(p_ent->elem.hdr.cid),
 134                   p_ent->elem.hdr.cmd_id, p_ent->elem.hdr.protocol_id,
 135                   OSAL_LE16_TO_CPU(p_ent->elem.hdr.echo));
 136
 137         ecore_hw_err_notify(p_hwfn, ECORE_HW_ERR_RAMROD_FAIL);
 138
 139         return ECORE_BUSY;
 140 }
 141
 142 /***************************************************************************
 143  * SPQ entries inner API
 144  ***************************************************************************/
 145 static enum _ecore_status_t
 146 ecore_spq_fill_entry(struct ecore_hwfn *p_hwfn, struct ecore_spq_entry *p_ent)
 147 {
 148         p_ent->flags = 0;
 149
 150         switch (p_ent->comp_mode) {
 151         case ECORE_SPQ_MODE_EBLOCK:
 152         case ECORE_SPQ_MODE_BLOCK:
 153                 p_ent->comp_cb.function = ecore_spq_blocking_cb;
 154                 break;
 155         case ECORE_SPQ_MODE_CB:
 156                 break;
 157         default:
 158                 DP_NOTICE(p_hwfn, true, "Unknown SPQE completion mode %d\n",
 159                           p_ent->comp_mode);
 160                 return ECORE_INVAL;
 161         }
 162
 163         DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 164                    "Ramrod header: [CID 0x%08x CMD 0x%02x protocol 0x%02x]"
 165                    " Data pointer: [%08x:%08x] Completion Mode: %s\n",
 166                    p_ent->elem.hdr.cid, p_ent->elem.hdr.cmd_id,
 167                    p_ent->elem.hdr.protocol_id,
 168                    p_ent->elem.data_ptr.hi, p_ent->elem.data_ptr.lo,
 169                    D_TRINE(p_ent->comp_mode, ECORE_SPQ_MODE_EBLOCK,
 170                            ECORE_SPQ_MODE_BLOCK, "MODE_EBLOCK", "MODE_BLOCK",
 171                            "MODE_CB"));
 172
 173         return ECORE_SUCCESS;
 174 }
 175
 176 /***************************************************************************
 177  * HSI access
 178  ***************************************************************************/
 179 static void ecore_spq_hw_initialize(struct ecore_hwfn *p_hwfn,
 180                                     struct ecore_spq *p_spq)
 181 {
 182         struct ecore_cxt_info cxt_info;
 183         struct core_conn_context *p_cxt;
 184         enum _ecore_status_t rc;
 185         u16 physical_q;
 186
 187         cxt_info.iid = p_spq->cid;
 188
 189         rc = ecore_cxt_get_cid_info(p_hwfn, &cxt_info);
 190
 191         if (rc < 0) {
 192                 DP_NOTICE(p_hwfn, true, "Cannot find context info for cid=%d\n",
 193                           p_spq->cid);
 194                 return;
 195         }
 196
 197         p_cxt = cxt_info.p_cxt;
 198
 199         /* @@@TBD we zero the context until we have ilt_reset implemented. */
 200         OSAL_MEM_ZERO(p_cxt, sizeof(*p_cxt));
 201
 202         if (ECORE_IS_BB(p_hwfn->p_dev) || ECORE_IS_AH(p_hwfn->p_dev)) {
 203                 SET_FIELD(p_cxt->xstorm_ag_context.flags10,
 204                           E4_XSTORM_CORE_CONN_AG_CTX_DQ_CF_EN, 1);
 205                 SET_FIELD(p_cxt->xstorm_ag_context.flags1,
 206                           E4_XSTORM_CORE_CONN_AG_CTX_DQ_CF_ACTIVE, 1);
 207                 /* SET_FIELD(p_cxt->xstorm_ag_context.flags10,
 208                  *        E4_XSTORM_CORE_CONN_AG_CTX_SLOW_PATH_EN, 1);
 209                  */
 210                 SET_FIELD(p_cxt->xstorm_ag_context.flags9,
 211                           E4_XSTORM_CORE_CONN_AG_CTX_CONSOLID_PROD_CF_EN, 1);
 212         }
 213
 214         /* CDU validation - FIXME currently disabled */
 215
 216         /* QM physical queue */
 217         physical_q = ecore_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB);
 218         p_cxt->xstorm_ag_context.physical_q0 = OSAL_CPU_TO_LE16(physical_q);
 219
 220         p_cxt->xstorm_st_context.spq_base_lo =
 221             DMA_LO_LE(p_spq->chain.p_phys_addr);
 222         p_cxt->xstorm_st_context.spq_base_hi =
 223             DMA_HI_LE(p_spq->chain.p_phys_addr);
 224
 225         DMA_REGPAIR_LE(p_cxt->xstorm_st_context.consolid_base_addr,
 226                        p_hwfn->p_consq->chain.p_phys_addr);
 227 }
 228
 229 static enum _ecore_status_t ecore_spq_hw_post(struct ecore_hwfn *p_hwfn,
 230                                               struct ecore_spq *p_spq,
 231                                               struct ecore_spq_entry *p_ent)
 232 {
 233         struct ecore_chain *p_chain = &p_hwfn->p_spq->chain;
 234         struct core_db_data *p_db_data = &p_spq->db_data;
 235         u16 echo = ecore_chain_get_prod_idx(p_chain);
 236         struct slow_path_element *elem;
 237
 238         p_ent->elem.hdr.echo = OSAL_CPU_TO_LE16(echo);
 239         elem = ecore_chain_produce(p_chain);
 240         if (!elem) {
 241                 DP_NOTICE(p_hwfn, true, "Failed to produce from SPQ chain\n");
 242                 return ECORE_INVAL;
 243         }
 244
 245         *elem = p_ent->elem;    /* Struct assignment */
 246
 247         p_db_data->spq_prod =
 248                 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, p_spq->db_addr_offset, *(u32 *)p_db_data);
 254
 255         /* Make sure doorbell is rang */
 256         OSAL_WMB(p_hwfn->p_dev);
 257
 258         DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 259                    "Doorbelled [0x%08x, CID 0x%08x] with Flags: %02x"
 260                    " agg_params: %02x, prod: %04x\n",
 261                    p_spq->db_addr_offset, p_spq->cid, p_db_data->params,
 262                    p_db_data->agg_flags, ecore_chain_get_prod_idx(p_chain));
 263
 264         return ECORE_SUCCESS;
 265 }
 266
 267 /***************************************************************************
 268  * Asynchronous events
 269  ***************************************************************************/
 270
 271 static enum _ecore_status_t
 272 ecore_async_event_completion(struct ecore_hwfn *p_hwfn,
 273                              struct event_ring_entry *p_eqe)
 274 {
 275         switch (p_eqe->protocol_id) {
 276         case PROTOCOLID_COMMON:
 277                 return ecore_sriov_eqe_event(p_hwfn,
 278                                              p_eqe->opcode,
 279                                              p_eqe->echo, &p_eqe->data);
 280         default:
 281                 DP_NOTICE(p_hwfn,
 282                           true, "Unknown Async completion for protocol: %d\n",
 283                           p_eqe->protocol_id);
 284                 return ECORE_INVAL;
 285         }
 286 }
 287
 288 /***************************************************************************
 289  * EQ API
 290  ***************************************************************************/
 291 void ecore_eq_prod_update(struct ecore_hwfn *p_hwfn, u16 prod)
 292 {
 293         u32 addr = GTT_BAR0_MAP_REG_USDM_RAM +
 294             USTORM_EQE_CONS_OFFSET(p_hwfn->rel_pf_id);
 295
 296         REG_WR16(p_hwfn, addr, prod);
 297
 298         /* keep prod updates ordered */
 299         OSAL_MMIOWB(p_hwfn->p_dev);
 300 }
 301
 302 enum _ecore_status_t ecore_eq_completion(struct ecore_hwfn *p_hwfn,
 303                                          void *cookie)
 304 {
 305         struct ecore_eq *p_eq = cookie;
 306         struct ecore_chain *p_chain = &p_eq->chain;
 307         enum _ecore_status_t rc = 0;
 308
 309         /* take a snapshot of the FW consumer */
 310         u16 fw_cons_idx = OSAL_LE16_TO_CPU(*p_eq->p_fw_cons);
 311
 312         DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ, "fw_cons_idx %x\n", fw_cons_idx);
 313
 314         /* Need to guarantee the fw_cons index we use points to a usuable
 315          * element (to comply with our chain), so our macros would comply
 316          */
 317         if ((fw_cons_idx & ecore_chain_get_usable_per_page(p_chain)) ==
 318             ecore_chain_get_usable_per_page(p_chain)) {
 319                 fw_cons_idx += ecore_chain_get_unusable_per_page(p_chain);
 320         }
 321
 322         /* Complete current segment of eq entries */
 323         while (fw_cons_idx != ecore_chain_get_cons_idx(p_chain)) {
 324                 struct event_ring_entry *p_eqe = ecore_chain_consume(p_chain);
 325                 if (!p_eqe) {
 326                         rc = ECORE_INVAL;
 327                         break;
 328                 }
 329
 330                 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 331                            "op %x prot %x res0 %x echo %x fwret %x flags %x\n",
 332                            p_eqe->opcode,            /* Event Opcode */
 333                            p_eqe->protocol_id,  /* Event Protocol ID */
 334                            p_eqe->reserved0,    /* Reserved */
 335                            /* Echo value from ramrod data on the host */
 336                            OSAL_LE16_TO_CPU(p_eqe->echo),
 337                            p_eqe->fw_return_code,    /* FW return code for SP
 338                                                       * ramrods
 339                                                       */
 340                            p_eqe->flags);
 341
 342                 if (GET_FIELD(p_eqe->flags, EVENT_RING_ENTRY_ASYNC)) {
 343                         if (ecore_async_event_completion(p_hwfn, p_eqe))
 344                                 rc = ECORE_INVAL;
 345                 } else if (ecore_spq_completion(p_hwfn,
 346                                                 p_eqe->echo,
 347                                                 p_eqe->fw_return_code,
 348                                                 &p_eqe->data)) {
 349                         rc = ECORE_INVAL;
 350                 }
 351
 352                 ecore_chain_recycle_consumed(p_chain);
 353         }
 354
 355         ecore_eq_prod_update(p_hwfn, ecore_chain_get_prod_idx(p_chain));
 356
 357         return rc;
 358 }
 359
 360 enum _ecore_status_t ecore_eq_alloc(struct ecore_hwfn *p_hwfn, u16 num_elem)
 361 {
 362         struct ecore_eq *p_eq;
 363
 364         /* Allocate EQ struct */
 365         p_eq = OSAL_ZALLOC(p_hwfn->p_dev, GFP_KERNEL, sizeof(*p_eq));
 366         if (!p_eq) {
 367                 DP_NOTICE(p_hwfn, true,
 368                           "Failed to allocate `struct ecore_eq'\n");
 369                 return ECORE_NOMEM;
 370         }
 371
 372         /* Allocate and initialize EQ chain*/
 373         if (ecore_chain_alloc(p_hwfn->p_dev,
 374                               ECORE_CHAIN_USE_TO_PRODUCE,
 375                               ECORE_CHAIN_MODE_PBL,
 376                               ECORE_CHAIN_CNT_TYPE_U16,
 377                               num_elem,
 378                               sizeof(union event_ring_element),
 379                               &p_eq->chain, OSAL_NULL) != ECORE_SUCCESS) {
 380                 DP_NOTICE(p_hwfn, true, "Failed to allocate eq chain\n");
 381                 goto eq_allocate_fail;
 382         }
 383
 384         /* register EQ completion on the SP SB */
 385         ecore_int_register_cb(p_hwfn, ecore_eq_completion,
 386                               p_eq, &p_eq->eq_sb_index, &p_eq->p_fw_cons);
 387
 388         p_hwfn->p_eq = p_eq;
 389         return ECORE_SUCCESS;
 390
 391 eq_allocate_fail:
 392         OSAL_FREE(p_hwfn->p_dev, p_eq);
 393         return ECORE_NOMEM;
 394 }
 395
 396 void ecore_eq_setup(struct ecore_hwfn *p_hwfn)
 397 {
 398         ecore_chain_reset(&p_hwfn->p_eq->chain);
 399 }
 400
 401 void ecore_eq_free(struct ecore_hwfn *p_hwfn)
 402 {
 403         if (!p_hwfn->p_eq)
 404                 return;
 405
 406         ecore_chain_free(p_hwfn->p_dev, &p_hwfn->p_eq->chain);
 407
 408         OSAL_FREE(p_hwfn->p_dev, p_hwfn->p_eq);
 409         p_hwfn->p_eq = OSAL_NULL;
 410 }
 411
 412 /***************************************************************************
 413 * CQE API - manipulate EQ functionality
 414 ***************************************************************************/
 415 static enum _ecore_status_t ecore_cqe_completion(struct ecore_hwfn *p_hwfn,
 416                                                  struct eth_slow_path_rx_cqe
 417                                                  *cqe,
 418                                                  enum protocol_type protocol)
 419 {
 420         if (IS_VF(p_hwfn->p_dev))
 421                 return OSAL_VF_CQE_COMPLETION(p_hwfn, cqe, protocol);
 422
 423         /* @@@tmp - it's possible we'll eventually want to handle some
 424          * actual commands that can arrive here, but for now this is only
 425          * used to complete the ramrod using the echo value on the cqe
 426          */
 427         return ecore_spq_completion(p_hwfn, cqe->echo, 0, OSAL_NULL);
 428 }
 429
 430 enum _ecore_status_t ecore_eth_cqe_completion(struct ecore_hwfn *p_hwfn,
 431                                               struct eth_slow_path_rx_cqe *cqe)
 432 {
 433         enum _ecore_status_t rc;
 434
 435         rc = ecore_cqe_completion(p_hwfn, cqe, PROTOCOLID_ETH);
 436         if (rc) {
 437                 DP_NOTICE(p_hwfn, true,
 438                           "Failed to handle RXQ CQE [cmd 0x%02x]\n",
 439                           cqe->ramrod_cmd_id);
 440         }
 441
 442         return rc;
 443 }
 444
 445 /***************************************************************************
 446  * Slow hwfn Queue (spq)
 447  ***************************************************************************/
 448 void ecore_spq_setup(struct ecore_hwfn *p_hwfn)
 449 {
 450         struct ecore_spq *p_spq = p_hwfn->p_spq;
 451         struct ecore_spq_entry *p_virt = OSAL_NULL;
 452         struct core_db_data *p_db_data;
 453         void OSAL_IOMEM *db_addr;
 454         dma_addr_t p_phys = 0;
 455         u32 i, capacity;
 456         enum _ecore_status_t rc;
 457
 458         OSAL_LIST_INIT(&p_spq->pending);
 459         OSAL_LIST_INIT(&p_spq->completion_pending);
 460         OSAL_LIST_INIT(&p_spq->free_pool);
 461         OSAL_LIST_INIT(&p_spq->unlimited_pending);
 462         OSAL_SPIN_LOCK_INIT(&p_spq->lock);
 463
 464         /* SPQ empty pool */
 465         p_phys = p_spq->p_phys + OFFSETOF(struct ecore_spq_entry, ramrod);
 466         p_virt = p_spq->p_virt;
 467
 468         capacity = ecore_chain_get_capacity(&p_spq->chain);
 469         for (i = 0; i < capacity; i++) {
 470                 DMA_REGPAIR_LE(p_virt->elem.data_ptr, p_phys);
 471
 472                 OSAL_LIST_PUSH_TAIL(&p_virt->list, &p_spq->free_pool);
 473
 474                 p_virt++;
 475                 p_phys += sizeof(struct ecore_spq_entry);
 476         }
 477
 478         /* Statistics */
 479         p_spq->normal_count = 0;
 480         p_spq->comp_count = 0;
 481         p_spq->comp_sent_count = 0;
 482         p_spq->unlimited_pending_count = 0;
 483
 484         OSAL_MEM_ZERO(p_spq->p_comp_bitmap,
 485                       SPQ_COMP_BMAP_SIZE * sizeof(unsigned long));
 486         p_spq->comp_bitmap_idx = 0;
 487
 488         /* SPQ cid, cannot fail */
 489         ecore_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_spq->cid);
 490         ecore_spq_hw_initialize(p_hwfn, p_spq);
 491
 492         /* reset the chain itself */
 493         ecore_chain_reset(&p_spq->chain);
 494
 495         /* Initialize the address/data of the SPQ doorbell */
 496         p_spq->db_addr_offset = DB_ADDR(p_spq->cid, DQ_DEMS_LEGACY);
 497         p_db_data = &p_spq->db_data;
 498         OSAL_MEM_ZERO(p_db_data, sizeof(*p_db_data));
 499         SET_FIELD(p_db_data->params, CORE_DB_DATA_DEST, DB_DEST_XCM);
 500         SET_FIELD(p_db_data->params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_MAX);
 501         SET_FIELD(p_db_data->params, CORE_DB_DATA_AGG_VAL_SEL,
 502                   DQ_XCM_CORE_SPQ_PROD_CMD);
 503         p_db_data->agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
 504
 505         /* Register the SPQ doorbell with the doorbell recovery mechanism */
 506         db_addr = (void *)((u8 *)p_hwfn->doorbells + p_spq->db_addr_offset);
 507         rc = ecore_db_recovery_add(p_hwfn->p_dev, db_addr, &p_spq->db_data,
 508                                    DB_REC_WIDTH_32B, DB_REC_KERNEL);
 509         if (rc != ECORE_SUCCESS)
 510                 DP_INFO(p_hwfn,
 511                         "Failed to register the SPQ doorbell with the doorbell recovery mechanism\n");
 512 }
 513
 514 enum _ecore_status_t ecore_spq_alloc(struct ecore_hwfn *p_hwfn)
 515 {
 516         struct ecore_spq_entry *p_virt = OSAL_NULL;
 517         struct ecore_spq *p_spq = OSAL_NULL;
 518         dma_addr_t p_phys = 0;
 519         u32 capacity;
 520
 521         /* SPQ struct */
 522         p_spq =
 523             OSAL_ZALLOC(p_hwfn->p_dev, GFP_KERNEL, sizeof(struct ecore_spq));
 524         if (!p_spq) {
 525                 DP_NOTICE(p_hwfn, true,
 526                           "Failed to allocate `struct ecore_spq'\n");
 527                 return ECORE_NOMEM;
 528         }
 529
 530         /* SPQ ring  */
 531         if (ecore_chain_alloc(p_hwfn->p_dev,
 532                               ECORE_CHAIN_USE_TO_PRODUCE,
 533                               ECORE_CHAIN_MODE_SINGLE,
 534                               ECORE_CHAIN_CNT_TYPE_U16,
 535                               0, /* N/A when the mode is SINGLE */
 536                               sizeof(struct slow_path_element),
 537                               &p_spq->chain, OSAL_NULL)) {
 538                 DP_NOTICE(p_hwfn, true, "Failed to allocate spq chain\n");
 539                 goto spq_allocate_fail;
 540         }
 541
 542         /* allocate and fill the SPQ elements (incl. ramrod data list) */
 543         capacity = ecore_chain_get_capacity(&p_spq->chain);
 544         p_virt = OSAL_DMA_ALLOC_COHERENT(p_hwfn->p_dev, &p_phys,
 545                                          capacity *
 546                                          sizeof(struct ecore_spq_entry));
 547         if (!p_virt)
 548                 goto spq_allocate_fail;
 549
 550         p_spq->p_virt = p_virt;
 551         p_spq->p_phys = p_phys;
 552
 553 #ifdef CONFIG_ECORE_LOCK_ALLOC
 554         OSAL_SPIN_LOCK_ALLOC(p_hwfn, &p_spq->lock);
 555 #endif
 556
 557         p_hwfn->p_spq = p_spq;
 558         return ECORE_SUCCESS;
 559
 560 spq_allocate_fail:
 561         ecore_chain_free(p_hwfn->p_dev, &p_spq->chain);
 562         OSAL_FREE(p_hwfn->p_dev, p_spq);
 563         return ECORE_NOMEM;
 564 }
 565
 566 void ecore_spq_free(struct ecore_hwfn *p_hwfn)
 567 {
 568         struct ecore_spq *p_spq = p_hwfn->p_spq;
 569         void OSAL_IOMEM *db_addr;
 570         u32 capacity;
 571
 572         if (!p_spq)
 573                 return;
 574
 575         /* Delete the SPQ doorbell from the doorbell recovery mechanism */
 576         db_addr = (void *)((u8 *)p_hwfn->doorbells + p_spq->db_addr_offset);
 577         ecore_db_recovery_del(p_hwfn->p_dev, db_addr, &p_spq->db_data);
 578
 579         if (p_spq->p_virt) {
 580                 capacity = ecore_chain_get_capacity(&p_spq->chain);
 581                 OSAL_DMA_FREE_COHERENT(p_hwfn->p_dev,
 582                                        p_spq->p_virt,
 583                                        p_spq->p_phys,
 584                                        capacity *
 585                                        sizeof(struct ecore_spq_entry));
 586         }
 587
 588         ecore_chain_free(p_hwfn->p_dev, &p_spq->chain);
 589 #ifdef CONFIG_ECORE_LOCK_ALLOC
 590         OSAL_SPIN_LOCK_DEALLOC(&p_spq->lock);
 591 #endif
 592
 593         OSAL_FREE(p_hwfn->p_dev, p_spq);
 594 }
 595
 596 enum _ecore_status_t
 597 ecore_spq_get_entry(struct ecore_hwfn *p_hwfn, struct ecore_spq_entry **pp_ent)
 598 {
 599         struct ecore_spq *p_spq = p_hwfn->p_spq;
 600         struct ecore_spq_entry *p_ent = OSAL_NULL;
 601         enum _ecore_status_t rc = ECORE_SUCCESS;
 602
 603         OSAL_SPIN_LOCK(&p_spq->lock);
 604
 605         if (OSAL_LIST_IS_EMPTY(&p_spq->free_pool)) {
 606                 p_ent = OSAL_ZALLOC(p_hwfn->p_dev, GFP_ATOMIC, sizeof(*p_ent));
 607                 if (!p_ent) {
 608                         DP_NOTICE(p_hwfn, true,
 609                                  "Failed to allocate an SPQ entry for a pending"
 610                                  " ramrod\n");
 611                         rc = ECORE_NOMEM;
 612                         goto out_unlock;
 613                 }
 614                 p_ent->queue = &p_spq->unlimited_pending;
 615         } else {
 616                 p_ent = OSAL_LIST_FIRST_ENTRY(&p_spq->free_pool,
 617                                               struct ecore_spq_entry, list);
 618                 OSAL_LIST_REMOVE_ENTRY(&p_ent->list, &p_spq->free_pool);
 619                 p_ent->queue = &p_spq->pending;
 620         }
 621
 622         *pp_ent = p_ent;
 623
 624 out_unlock:
 625         OSAL_SPIN_UNLOCK(&p_spq->lock);
 626         return rc;
 627 }
 628
 629 /* Locked variant; Should be called while the SPQ lock is taken */
 630 static void __ecore_spq_return_entry(struct ecore_hwfn *p_hwfn,
 631                                      struct ecore_spq_entry *p_ent)
 632 {
 633         OSAL_LIST_PUSH_TAIL(&p_ent->list, &p_hwfn->p_spq->free_pool);
 634 }
 635
 636 void ecore_spq_return_entry(struct ecore_hwfn *p_hwfn,
 637                             struct ecore_spq_entry *p_ent)
 638 {
 639         OSAL_SPIN_LOCK(&p_hwfn->p_spq->lock);
 640         __ecore_spq_return_entry(p_hwfn, p_ent);
 641         OSAL_SPIN_UNLOCK(&p_hwfn->p_spq->lock);
 642 }
 643
 644 /**
 645  * @brief ecore_spq_add_entry - adds a new entry to the pending
 646  *        list. Should be used while lock is being held.
 647  *
 648  * Addes an entry to the pending list is there is room (en empty
 649  * element is available in the free_pool), or else places the
 650  * entry in the unlimited_pending pool.
 651  *
 652  * @param p_hwfn
 653  * @param p_ent
 654  * @param priority
 655  *
 656  * @return enum _ecore_status_t
 657  */
 658 static enum _ecore_status_t
 659 ecore_spq_add_entry(struct ecore_hwfn *p_hwfn,
 660                     struct ecore_spq_entry *p_ent, enum spq_priority priority)
 661 {
 662         struct ecore_spq *p_spq = p_hwfn->p_spq;
 663
 664         if (p_ent->queue == &p_spq->unlimited_pending) {
 665                 if (OSAL_LIST_IS_EMPTY(&p_spq->free_pool)) {
 666                         OSAL_LIST_PUSH_TAIL(&p_ent->list,
 667                                             &p_spq->unlimited_pending);
 668                         p_spq->unlimited_pending_count++;
 669
 670                         return ECORE_SUCCESS;
 671
 672                 } else {
 673                         struct ecore_spq_entry *p_en2;
 674
 675                         p_en2 = OSAL_LIST_FIRST_ENTRY(&p_spq->free_pool,
 676                                                      struct ecore_spq_entry,
 677                                                      list);
 678                         OSAL_LIST_REMOVE_ENTRY(&p_en2->list, &p_spq->free_pool);
 679
 680                         /* Copy the ring element physical pointer to the new
 681                          * entry, since we are about to override the entire ring
 682                          * entry and don't want to lose the pointer.
 683                          */
 684                         p_ent->elem.data_ptr = p_en2->elem.data_ptr;
 685
 686                         *p_en2 = *p_ent;
 687
 688                         /* EBLOCK responsible to free the allocated p_ent */
 689                         if (p_ent->comp_mode != ECORE_SPQ_MODE_EBLOCK)
 690                                 OSAL_FREE(p_hwfn->p_dev, p_ent);
 691
 692                         p_ent = p_en2;
 693                 }
 694         }
 695
 696         /* entry is to be placed in 'pending' queue */
 697         switch (priority) {
 698         case ECORE_SPQ_PRIORITY_NORMAL:
 699                 OSAL_LIST_PUSH_TAIL(&p_ent->list, &p_spq->pending);
 700                 p_spq->normal_count++;
 701                 break;
 702         case ECORE_SPQ_PRIORITY_HIGH:
 703                 OSAL_LIST_PUSH_HEAD(&p_ent->list, &p_spq->pending);
 704                 p_spq->high_count++;
 705                 break;
 706         default:
 707                 return ECORE_INVAL;
 708         }
 709
 710         return ECORE_SUCCESS;
 711 }
 712
 713 /***************************************************************************
 714  * Accessor
 715  ***************************************************************************/
 716
 717 u32 ecore_spq_get_cid(struct ecore_hwfn *p_hwfn)
 718 {
 719         if (!p_hwfn->p_spq)
 720                 return 0xffffffff;      /* illegal */
 721         return p_hwfn->p_spq->cid;
 722 }
 723
 724 /***************************************************************************
 725  * Posting new Ramrods
 726  ***************************************************************************/
 727
 728 static enum _ecore_status_t ecore_spq_post_list(struct ecore_hwfn *p_hwfn,
 729                                                 osal_list_t *head,
 730                                                 u32 keep_reserve)
 731 {
 732         struct ecore_spq *p_spq = p_hwfn->p_spq;
 733         enum _ecore_status_t rc;
 734
 735         /* TODO - implementation might be wasteful; will always keep room
 736          * for an additional high priority ramrod (even if one is already
 737          * pending FW)
 738          */
 739         while (ecore_chain_get_elem_left(&p_spq->chain) > keep_reserve &&
 740                !OSAL_LIST_IS_EMPTY(head)) {
 741                 struct ecore_spq_entry *p_ent =
 742                     OSAL_LIST_FIRST_ENTRY(head, struct ecore_spq_entry, list);
 743                 if (p_ent != OSAL_NULL) {
 744 #if defined(_NTDDK_)
 745 #pragma warning(suppress : 6011 28182)
 746 #endif
 747                         OSAL_LIST_REMOVE_ENTRY(&p_ent->list, head);
 748                         OSAL_LIST_PUSH_TAIL(&p_ent->list,
 749                                             &p_spq->completion_pending);
 750                         p_spq->comp_sent_count++;
 751
 752                         rc = ecore_spq_hw_post(p_hwfn, p_spq, p_ent);
 753                         if (rc) {
 754                                 OSAL_LIST_REMOVE_ENTRY(&p_ent->list,
 755                                                     &p_spq->completion_pending);
 756                                 __ecore_spq_return_entry(p_hwfn, p_ent);
 757                                 return rc;
 758                         }
 759                 }
 760         }
 761
 762         return ECORE_SUCCESS;
 763 }
 764
 765 static enum _ecore_status_t ecore_spq_pend_post(struct ecore_hwfn *p_hwfn)
 766 {
 767         struct ecore_spq *p_spq = p_hwfn->p_spq;
 768         struct ecore_spq_entry *p_ent = OSAL_NULL;
 769
 770         while (!OSAL_LIST_IS_EMPTY(&p_spq->free_pool)) {
 771                 if (OSAL_LIST_IS_EMPTY(&p_spq->unlimited_pending))
 772                         break;
 773
 774                 p_ent = OSAL_LIST_FIRST_ENTRY(&p_spq->unlimited_pending,
 775                                               struct ecore_spq_entry, list);
 776                 if (!p_ent)
 777                         return ECORE_INVAL;
 778
 779 #if defined(_NTDDK_)
 780 #pragma warning(suppress : 6011)
 781 #endif
 782                 OSAL_LIST_REMOVE_ENTRY(&p_ent->list, &p_spq->unlimited_pending);
 783
 784                 ecore_spq_add_entry(p_hwfn, p_ent, p_ent->priority);
 785         }
 786
 787         return ecore_spq_post_list(p_hwfn,
 788                                  &p_spq->pending, SPQ_HIGH_PRI_RESERVE_DEFAULT);
 789 }
 790
 791 enum _ecore_status_t ecore_spq_post(struct ecore_hwfn *p_hwfn,
 792                                     struct ecore_spq_entry *p_ent,
 793                                     u8 *fw_return_code)
 794 {
 795         enum _ecore_status_t rc = ECORE_SUCCESS;
 796         struct ecore_spq *p_spq = p_hwfn ? p_hwfn->p_spq : OSAL_NULL;
 797         bool b_ret_ent = true;
 798
 799         if (!p_hwfn)
 800                 return ECORE_INVAL;
 801
 802         if (!p_ent) {
 803                 DP_NOTICE(p_hwfn, true, "Got a NULL pointer\n");
 804                 return ECORE_INVAL;
 805         }
 806
 807         if (p_hwfn->p_dev->recov_in_prog) {
 808                 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 809                            "Recovery is in progress -> skip spq post"
 810                            " [cmd %02x protocol %02x]\n",
 811                            p_ent->elem.hdr.cmd_id, p_ent->elem.hdr.protocol_id);
 812                 /* Return success to let the flows to be completed successfully
 813                  * w/o any error handling.
 814                  */
 815                 return ECORE_SUCCESS;
 816         }
 817
 818         OSAL_SPIN_LOCK(&p_spq->lock);
 819
 820         /* Complete the entry */
 821         rc = ecore_spq_fill_entry(p_hwfn, p_ent);
 822
 823         /* Check return value after LOCK is taken for cleaner error flow */
 824         if (rc)
 825                 goto spq_post_fail;
 826
 827         /* Add the request to the pending queue */
 828         rc = ecore_spq_add_entry(p_hwfn, p_ent, p_ent->priority);
 829         if (rc)
 830                 goto spq_post_fail;
 831
 832         rc = ecore_spq_pend_post(p_hwfn);
 833         if (rc) {
 834                 /* Since it's possible that pending failed for a different
 835                  * entry [although unlikely], the failed entry was already
 836                  * dealt with; No need to return it here.
 837                  */
 838                 b_ret_ent = false;
 839                 goto spq_post_fail;
 840         }
 841
 842         OSAL_SPIN_UNLOCK(&p_spq->lock);
 843
 844         if (p_ent->comp_mode == ECORE_SPQ_MODE_EBLOCK) {
 845                 /* For entries in ECORE BLOCK mode, the completion code cannot
 846                  * perform the necessary cleanup - if it did, we couldn't
 847                  * access p_ent here to see whether it's successful or not.
 848                  * Thus, after gaining the answer perform the cleanup here.
 849                  */
 850                 rc = ecore_spq_block(p_hwfn, p_ent, fw_return_code,
 851                                      p_ent->queue == &p_spq->unlimited_pending);
 852
 853                 if (p_ent->queue == &p_spq->unlimited_pending) {
 854                         /* This is an allocated p_ent which does not need to
 855                          * return to pool.
 856                          */
 857                         OSAL_FREE(p_hwfn->p_dev, p_ent);
 858
 859                         /* TBD: handle error flow and remove p_ent from
 860                          * completion pending
 861                          */
 862                         return rc;
 863                 }
 864
 865                 if (rc)
 866                         goto spq_post_fail2;
 867
 868                 /* return to pool */
 869                 ecore_spq_return_entry(p_hwfn, p_ent);
 870         }
 871         return rc;
 872
 873 spq_post_fail2:
 874         OSAL_SPIN_LOCK(&p_spq->lock);
 875         OSAL_LIST_REMOVE_ENTRY(&p_ent->list, &p_spq->completion_pending);
 876         ecore_chain_return_produced(&p_spq->chain);
 877
 878 spq_post_fail:
 879         /* return to the free pool */
 880         if (b_ret_ent)
 881                 __ecore_spq_return_entry(p_hwfn, p_ent);
 882         OSAL_SPIN_UNLOCK(&p_spq->lock);
 883
 884         return rc;
 885 }
 886
 887 enum _ecore_status_t ecore_spq_completion(struct ecore_hwfn *p_hwfn,
 888                                           __le16 echo,
 889                                           u8 fw_return_code,
 890                                           union event_ring_data *p_data)
 891 {
 892         struct ecore_spq *p_spq;
 893         struct ecore_spq_entry *p_ent = OSAL_NULL;
 894         struct ecore_spq_entry *tmp;
 895         struct ecore_spq_entry *found = OSAL_NULL;
 896         enum _ecore_status_t rc;
 897
 898         if (!p_hwfn)
 899                 return ECORE_INVAL;
 900
 901         p_spq = p_hwfn->p_spq;
 902         if (!p_spq)
 903                 return ECORE_INVAL;
 904
 905         OSAL_SPIN_LOCK(&p_spq->lock);
 906         OSAL_LIST_FOR_EACH_ENTRY_SAFE(p_ent,
 907                                       tmp,
 908                                       &p_spq->completion_pending,
 909                                       list, struct ecore_spq_entry) {
 910                 if (p_ent->elem.hdr.echo == echo) {
 911                         OSAL_LIST_REMOVE_ENTRY(&p_ent->list,
 912                                                &p_spq->completion_pending);
 913
 914                         /* Avoid overriding of SPQ entries when getting
 915                          * out-of-order completions, by marking the completions
 916                          * in a bitmap and increasing the chain consumer only
 917                          * for the first successive completed entries.
 918                          */
 919                         SPQ_COMP_BMAP_SET_BIT(p_spq, echo);
 920                         while (SPQ_COMP_BMAP_TEST_BIT(p_spq,
 921                                                       p_spq->comp_bitmap_idx)) {
 922                                 SPQ_COMP_BMAP_CLEAR_BIT(p_spq,
 923                                                         p_spq->comp_bitmap_idx);
 924                                 p_spq->comp_bitmap_idx++;
 925                                 ecore_chain_return_produced(&p_spq->chain);
 926                         }
 927
 928                         p_spq->comp_count++;
 929                         found = p_ent;
 930                         break;
 931                 }
 932
 933                 /* This is debug and should be relatively uncommon - depends
 934                  * on scenarios which have mutliple per-PF sent ramrods.
 935                  */
 936                 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 937                            "Got completion for echo %04x - doesn't match"
 938                            " echo %04x in completion pending list\n",
 939                            OSAL_LE16_TO_CPU(echo),
 940                            OSAL_LE16_TO_CPU(p_ent->elem.hdr.echo));
 941         }
 942
 943         /* Release lock before callback, as callback may post
 944          * an additional ramrod.
 945          */
 946         OSAL_SPIN_UNLOCK(&p_spq->lock);
 947
 948         if (!found) {
 949                 DP_NOTICE(p_hwfn, true,
 950                           "Failed to find an entry this"
 951                           " EQE [echo %04x] completes\n",
 952                           OSAL_LE16_TO_CPU(echo));
 953                 return ECORE_EXISTS;
 954         }
 955
 956         DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 957                    "Complete EQE [echo %04x]: func %p cookie %p)\n",
 958                    OSAL_LE16_TO_CPU(echo),
 959                    p_ent->comp_cb.function, p_ent->comp_cb.cookie);
 960         if (found->comp_cb.function)
 961                 found->comp_cb.function(p_hwfn, found->comp_cb.cookie, p_data,
 962                                         fw_return_code);
 963         else
 964                 DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ,
 965                            "Got a completion without a callback function\n");
 966
 967         if ((found->comp_mode != ECORE_SPQ_MODE_EBLOCK) ||
 968             (found->queue == &p_spq->unlimited_pending))
 969                 /* EBLOCK  is responsible for returning its own entry into the
 970                  * free list, unless it originally added the entry into the
 971                  * unlimited pending list.
 972                  */
 973                 ecore_spq_return_entry(p_hwfn, found);
 974
 975         /* Attempt to post pending requests */
 976         OSAL_SPIN_LOCK(&p_spq->lock);
 977         rc = ecore_spq_pend_post(p_hwfn);
 978         OSAL_SPIN_UNLOCK(&p_spq->lock);
 979
 980         return rc;
 981 }
 982
 983 enum _ecore_status_t ecore_consq_alloc(struct ecore_hwfn *p_hwfn)
 984 {
 985         struct ecore_consq *p_consq;
 986
 987         /* Allocate ConsQ struct */
 988         p_consq =
 989             OSAL_ZALLOC(p_hwfn->p_dev, GFP_KERNEL, sizeof(*p_consq));
 990         if (!p_consq) {
 991                 DP_NOTICE(p_hwfn, true,
 992                           "Failed to allocate `struct ecore_consq'\n");
 993                 return ECORE_NOMEM;
 994         }
 995
 996         /* Allocate and initialize EQ chain */
 997         if (ecore_chain_alloc(p_hwfn->p_dev,
 998                               ECORE_CHAIN_USE_TO_PRODUCE,
 999                               ECORE_CHAIN_MODE_PBL,
1000                               ECORE_CHAIN_CNT_TYPE_U16,
1001                               ECORE_CHAIN_PAGE_SIZE / 0x80,
1002                               0x80,
1003                               &p_consq->chain, OSAL_NULL) != ECORE_SUCCESS) {
1004                 DP_NOTICE(p_hwfn, true, "Failed to allocate consq chain");
1005                 goto consq_allocate_fail;
1006         }
1007
1008         p_hwfn->p_consq = p_consq;
1009         return ECORE_SUCCESS;
1010
1011 consq_allocate_fail:
1012         OSAL_FREE(p_hwfn->p_dev, p_consq);
1013         return ECORE_NOMEM;
1014 }
1015
1016 void ecore_consq_setup(struct ecore_hwfn *p_hwfn)
1017 {
1018         ecore_chain_reset(&p_hwfn->p_consq->chain);
1019 }
1020
1021 void ecore_consq_free(struct ecore_hwfn *p_hwfn)
1022 {
1023         if (!p_hwfn->p_consq)
1024                 return;
1025
1026         ecore_chain_free(p_hwfn->p_dev, &p_hwfn->p_consq->chain);
1027         OSAL_FREE(p_hwfn->p_dev, p_hwfn->p_consq);
1028 }