drivers/net/ethernet/intel/ice/ice_controlq.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (c) 2018, Intel Corporation. */
   3
   4 #include "ice_common.h"
   5
   6 /**
   7  * ice_adminq_init_regs - Initialize AdminQ registers
   8  * @hw: pointer to the hardware structure
   9  *
  10  * This assumes the alloc_sq and alloc_rq functions have already been called
  11  */
  12 static void ice_adminq_init_regs(struct ice_hw *hw)
  13 {
  14         struct ice_ctl_q_info *cq = &hw->adminq;
  15
  16         cq->sq.head = PF_FW_ATQH;
  17         cq->sq.tail = PF_FW_ATQT;
  18         cq->sq.len = PF_FW_ATQLEN;
  19         cq->sq.bah = PF_FW_ATQBAH;
  20         cq->sq.bal = PF_FW_ATQBAL;
  21         cq->sq.len_mask = PF_FW_ATQLEN_ATQLEN_M;
  22         cq->sq.len_ena_mask = PF_FW_ATQLEN_ATQENABLE_M;
  23         cq->sq.head_mask = PF_FW_ATQH_ATQH_M;
  24
  25         cq->rq.head = PF_FW_ARQH;
  26         cq->rq.tail = PF_FW_ARQT;
  27         cq->rq.len = PF_FW_ARQLEN;
  28         cq->rq.bah = PF_FW_ARQBAH;
  29         cq->rq.bal = PF_FW_ARQBAL;
  30         cq->rq.len_mask = PF_FW_ARQLEN_ARQLEN_M;
  31         cq->rq.len_ena_mask = PF_FW_ARQLEN_ARQENABLE_M;
  32         cq->rq.head_mask = PF_FW_ARQH_ARQH_M;
  33 }
  34
  35 /**
  36  * ice_check_sq_alive
  37  * @hw: pointer to the hw struct
  38  * @cq: pointer to the specific Control queue
  39  *
  40  * Returns true if Queue is enabled else false.
  41  */
  42 bool ice_check_sq_alive(struct ice_hw *hw, struct ice_ctl_q_info *cq)
  43 {
  44         /* check both queue-length and queue-enable fields */
  45         if (cq->sq.len && cq->sq.len_mask && cq->sq.len_ena_mask)
  46                 return (rd32(hw, cq->sq.len) & (cq->sq.len_mask |
  47                                                 cq->sq.len_ena_mask)) ==
  48                         (cq->num_sq_entries | cq->sq.len_ena_mask);
  49
  50         return false;
  51 }
  52
  53 /**
  54  * ice_alloc_ctrlq_sq_ring - Allocate Control Transmit Queue (ATQ) rings
  55  * @hw: pointer to the hardware structure
  56  * @cq: pointer to the specific Control queue
  57  */
  58 static enum ice_status
  59 ice_alloc_ctrlq_sq_ring(struct ice_hw *hw, struct ice_ctl_q_info *cq)
  60 {
  61         size_t size = cq->num_sq_entries * sizeof(struct ice_aq_desc);
  62
  63         cq->sq.desc_buf.va = dmam_alloc_coherent(ice_hw_to_dev(hw), size,
  64                                                  &cq->sq.desc_buf.pa,
  65                                                  GFP_KERNEL | __GFP_ZERO);
  66         if (!cq->sq.desc_buf.va)
  67                 return ICE_ERR_NO_MEMORY;
  68         cq->sq.desc_buf.size = size;
  69
  70         cq->sq.cmd_buf = devm_kcalloc(ice_hw_to_dev(hw), cq->num_sq_entries,
  71                                       sizeof(struct ice_sq_cd), GFP_KERNEL);
  72         if (!cq->sq.cmd_buf) {
  73                 dmam_free_coherent(ice_hw_to_dev(hw), cq->sq.desc_buf.size,
  74                                    cq->sq.desc_buf.va, cq->sq.desc_buf.pa);
  75                 cq->sq.desc_buf.va = NULL;
  76                 cq->sq.desc_buf.pa = 0;
  77                 cq->sq.desc_buf.size = 0;
  78                 return ICE_ERR_NO_MEMORY;
  79         }
  80
  81         return 0;
  82 }
  83
  84 /**
  85  * ice_alloc_ctrlq_rq_ring - Allocate Control Receive Queue (ARQ) rings
  86  * @hw: pointer to the hardware structure
  87  * @cq: pointer to the specific Control queue
  88  */
  89 static enum ice_status
  90 ice_alloc_ctrlq_rq_ring(struct ice_hw *hw, struct ice_ctl_q_info *cq)
  91 {
  92         size_t size = cq->num_rq_entries * sizeof(struct ice_aq_desc);
  93
  94         cq->rq.desc_buf.va = dmam_alloc_coherent(ice_hw_to_dev(hw), size,
  95                                                  &cq->rq.desc_buf.pa,
  96                                                  GFP_KERNEL | __GFP_ZERO);
  97         if (!cq->rq.desc_buf.va)
  98                 return ICE_ERR_NO_MEMORY;
  99         cq->rq.desc_buf.size = size;
 100         return 0;
 101 }
 102
 103 /**
 104  * ice_free_ctrlq_sq_ring - Free Control Transmit Queue (ATQ) rings
 105  * @hw: pointer to the hardware structure
 106  * @cq: pointer to the specific Control queue
 107  *
 108  * This assumes the posted send buffers have already been cleaned
 109  * and de-allocated
 110  */
 111 static void ice_free_ctrlq_sq_ring(struct ice_hw *hw, struct ice_ctl_q_info *cq)
 112 {
 113         dmam_free_coherent(ice_hw_to_dev(hw), cq->sq.desc_buf.size,
 114                            cq->sq.desc_buf.va, cq->sq.desc_buf.pa);
 115         cq->sq.desc_buf.va = NULL;
 116         cq->sq.desc_buf.pa = 0;
 117         cq->sq.desc_buf.size = 0;
 118 }
 119
 120 /**
 121  * ice_free_ctrlq_rq_ring - Free Control Receive Queue (ARQ) rings
 122  * @hw: pointer to the hardware structure
 123  * @cq: pointer to the specific Control queue
 124  *
 125  * This assumes the posted receive buffers have already been cleaned
 126  * and de-allocated
 127  */
 128 static void ice_free_ctrlq_rq_ring(struct ice_hw *hw, struct ice_ctl_q_info *cq)
 129 {
 130         dmam_free_coherent(ice_hw_to_dev(hw), cq->rq.desc_buf.size,
 131                            cq->rq.desc_buf.va, cq->rq.desc_buf.pa);
 132         cq->rq.desc_buf.va = NULL;
 133         cq->rq.desc_buf.pa = 0;
 134         cq->rq.desc_buf.size = 0;
 135 }
 136
 137 /**
 138  * ice_alloc_rq_bufs - Allocate pre-posted buffers for the ARQ
 139  * @hw: pointer to the hardware structure
 140  * @cq: pointer to the specific Control queue
 141  */
 142 static enum ice_status
 143 ice_alloc_rq_bufs(struct ice_hw *hw, struct ice_ctl_q_info *cq)
 144 {
 145         int i;
 146
 147         /* We'll be allocating the buffer info memory first, then we can
 148          * allocate the mapped buffers for the event processing
 149          */
 150         cq->rq.dma_head = devm_kcalloc(ice_hw_to_dev(hw), cq->num_rq_entries,
 151                                        sizeof(cq->rq.desc_buf), GFP_KERNEL);
 152         if (!cq->rq.dma_head)
 153                 return ICE_ERR_NO_MEMORY;
 154         cq->rq.r.rq_bi = (struct ice_dma_mem *)cq->rq.dma_head;
 155
 156         /* allocate the mapped buffers */
 157         for (i = 0; i < cq->num_rq_entries; i++) {
 158                 struct ice_aq_desc *desc;
 159                 struct ice_dma_mem *bi;
 160
 161                 bi = &cq->rq.r.rq_bi[i];
 162                 bi->va = dmam_alloc_coherent(ice_hw_to_dev(hw),
 163                                              cq->rq_buf_size, &bi->pa,
 164                                              GFP_KERNEL | __GFP_ZERO);
 165                 if (!bi->va)
 166                         goto unwind_alloc_rq_bufs;
 167                 bi->size = cq->rq_buf_size;
 168
 169                 /* now configure the descriptors for use */
 170                 desc = ICE_CTL_Q_DESC(cq->rq, i);
 171
 172                 desc->flags = cpu_to_le16(ICE_AQ_FLAG_BUF);
 173                 if (cq->rq_buf_size > ICE_AQ_LG_BUF)
 174                         desc->flags |= cpu_to_le16(ICE_AQ_FLAG_LB);
 175                 desc->opcode = 0;
 176                 /* This is in accordance with Admin queue design, there is no
 177                  * register for buffer size configuration
 178                  */
 179                 desc->datalen = cpu_to_le16(bi->size);
 180                 desc->retval = 0;
 181                 desc->cookie_high = 0;
 182                 desc->cookie_low = 0;
 183                 desc->params.generic.addr_high =
 184                         cpu_to_le32(upper_32_bits(bi->pa));
 185                 desc->params.generic.addr_low =
 186                         cpu_to_le32(lower_32_bits(bi->pa));
 187                 desc->params.generic.param0 = 0;
 188                 desc->params.generic.param1 = 0;
 189         }
 190         return 0;
 191
 192 unwind_alloc_rq_bufs:
 193         /* don't try to free the one that failed... */
 194         i--;
 195         for (; i >= 0; i--) {
 196                 dmam_free_coherent(ice_hw_to_dev(hw), cq->rq.r.rq_bi[i].size,
 197                                    cq->rq.r.rq_bi[i].va, cq->rq.r.rq_bi[i].pa);
 198                 cq->rq.r.rq_bi[i].va = NULL;
 199                 cq->rq.r.rq_bi[i].pa = 0;
 200                 cq->rq.r.rq_bi[i].size = 0;
 201         }
 202         devm_kfree(ice_hw_to_dev(hw), cq->rq.dma_head);
 203
 204         return ICE_ERR_NO_MEMORY;
 205 }
 206
 207 /**
 208  * ice_alloc_sq_bufs - Allocate empty buffer structs for the ATQ
 209  * @hw: pointer to the hardware structure
 210  * @cq: pointer to the specific Control queue
 211  */
 212 static enum ice_status
 213 ice_alloc_sq_bufs(struct ice_hw *hw, struct ice_ctl_q_info *cq)
 214 {
 215         int i;
 216
 217         /* No mapped memory needed yet, just the buffer info structures */
 218         cq->sq.dma_head = devm_kcalloc(ice_hw_to_dev(hw), cq->num_sq_entries,
 219                                        sizeof(cq->sq.desc_buf), GFP_KERNEL);
 220         if (!cq->sq.dma_head)
 221                 return ICE_ERR_NO_MEMORY;
 222         cq->sq.r.sq_bi = (struct ice_dma_mem *)cq->sq.dma_head;
 223
 224         /* allocate the mapped buffers */
 225         for (i = 0; i < cq->num_sq_entries; i++) {
 226                 struct ice_dma_mem *bi;
 227
 228                 bi = &cq->sq.r.sq_bi[i];
 229                 bi->va = dmam_alloc_coherent(ice_hw_to_dev(hw),
 230                                              cq->sq_buf_size, &bi->pa,
 231                                              GFP_KERNEL | __GFP_ZERO);
 232                 if (!bi->va)
 233                         goto unwind_alloc_sq_bufs;
 234                 bi->size = cq->sq_buf_size;
 235         }
 236         return 0;
 237
 238 unwind_alloc_sq_bufs:
 239         /* don't try to free the one that failed... */
 240         i--;
 241         for (; i >= 0; i--) {
 242                 dmam_free_coherent(ice_hw_to_dev(hw), cq->sq.r.sq_bi[i].size,
 243                                    cq->sq.r.sq_bi[i].va, cq->sq.r.sq_bi[i].pa);
 244                 cq->sq.r.sq_bi[i].va = NULL;
 245                 cq->sq.r.sq_bi[i].pa = 0;
 246                 cq->sq.r.sq_bi[i].size = 0;
 247         }
 248         devm_kfree(ice_hw_to_dev(hw), cq->sq.dma_head);
 249
 250         return ICE_ERR_NO_MEMORY;
 251 }
 252
 253 /**
 254  * ice_free_rq_bufs - Free ARQ buffer info elements
 255  * @hw: pointer to the hardware structure
 256  * @cq: pointer to the specific Control queue
 257  */
 258 static void ice_free_rq_bufs(struct ice_hw *hw, struct ice_ctl_q_info *cq)
 259 {
 260         int i;
 261
 262         /* free descriptors */
 263         for (i = 0; i < cq->num_rq_entries; i++) {
 264                 dmam_free_coherent(ice_hw_to_dev(hw), cq->rq.r.rq_bi[i].size,
 265                                    cq->rq.r.rq_bi[i].va, cq->rq.r.rq_bi[i].pa);
 266                 cq->rq.r.rq_bi[i].va = NULL;
 267                 cq->rq.r.rq_bi[i].pa = 0;
 268                 cq->rq.r.rq_bi[i].size = 0;
 269         }
 270
 271         /* free the dma header */
 272         devm_kfree(ice_hw_to_dev(hw), cq->rq.dma_head);
 273 }
 274
 275 /**
 276  * ice_free_sq_bufs - Free ATQ buffer info elements
 277  * @hw: pointer to the hardware structure
 278  * @cq: pointer to the specific Control queue
 279  */
 280 static void ice_free_sq_bufs(struct ice_hw *hw, struct ice_ctl_q_info *cq)
 281 {
 282         int i;
 283
 284         /* only unmap if the address is non-NULL */
 285         for (i = 0; i < cq->num_sq_entries; i++)
 286                 if (cq->sq.r.sq_bi[i].pa) {
 287                         dmam_free_coherent(ice_hw_to_dev(hw),
 288                                            cq->sq.r.sq_bi[i].size,
 289                                            cq->sq.r.sq_bi[i].va,
 290                                            cq->sq.r.sq_bi[i].pa);
 291                         cq->sq.r.sq_bi[i].va = NULL;
 292                         cq->sq.r.sq_bi[i].pa = 0;
 293                         cq->sq.r.sq_bi[i].size = 0;
 294                 }
 295
 296         /* free the buffer info list */
 297         devm_kfree(ice_hw_to_dev(hw), cq->sq.cmd_buf);
 298
 299         /* free the dma header */
 300         devm_kfree(ice_hw_to_dev(hw), cq->sq.dma_head);
 301 }
 302
 303 /**
 304  * ice_cfg_sq_regs - configure Control ATQ registers
 305  * @hw: pointer to the hardware structure
 306  * @cq: pointer to the specific Control queue
 307  *
 308  * Configure base address and length registers for the transmit queue
 309  */
 310 static enum ice_status
 311 ice_cfg_sq_regs(struct ice_hw *hw, struct ice_ctl_q_info *cq)
 312 {
 313         u32 reg = 0;
 314
 315         /* Clear Head and Tail */
 316         wr32(hw, cq->sq.head, 0);
 317         wr32(hw, cq->sq.tail, 0);
 318
 319         /* set starting point */
 320         wr32(hw, cq->sq.len, (cq->num_sq_entries | cq->sq.len_ena_mask));
 321         wr32(hw, cq->sq.bal, lower_32_bits(cq->sq.desc_buf.pa));
 322         wr32(hw, cq->sq.bah, upper_32_bits(cq->sq.desc_buf.pa));
 323
 324         /* Check one register to verify that config was applied */
 325         reg = rd32(hw, cq->sq.bal);
 326         if (reg != lower_32_bits(cq->sq.desc_buf.pa))
 327                 return ICE_ERR_AQ_ERROR;
 328
 329         return 0;
 330 }
 331
 332 /**
 333  * ice_cfg_rq_regs - configure Control ARQ register
 334  * @hw: pointer to the hardware structure
 335  * @cq: pointer to the specific Control queue
 336  *
 337  * Configure base address and length registers for the receive (event q)
 338  */
 339 static enum ice_status
 340 ice_cfg_rq_regs(struct ice_hw *hw, struct ice_ctl_q_info *cq)
 341 {
 342         u32 reg = 0;
 343
 344         /* Clear Head and Tail */
 345         wr32(hw, cq->rq.head, 0);
 346         wr32(hw, cq->rq.tail, 0);
 347
 348         /* set starting point */
 349         wr32(hw, cq->rq.len, (cq->num_rq_entries | cq->rq.len_ena_mask));
 350         wr32(hw, cq->rq.bal, lower_32_bits(cq->rq.desc_buf.pa));
 351         wr32(hw, cq->rq.bah, upper_32_bits(cq->rq.desc_buf.pa));
 352
 353         /* Update tail in the HW to post pre-allocated buffers */
 354         wr32(hw, cq->rq.tail, (u32)(cq->num_rq_entries - 1));
 355
 356         /* Check one register to verify that config was applied */
 357         reg = rd32(hw, cq->rq.bal);
 358         if (reg != lower_32_bits(cq->rq.desc_buf.pa))
 359                 return ICE_ERR_AQ_ERROR;
 360
 361         return 0;
 362 }
 363
 364 /**
 365  * ice_init_sq - main initialization routine for Control ATQ
 366  * @hw: pointer to the hardware structure
 367  * @cq: pointer to the specific Control queue
 368  *
 369  * This is the main initialization routine for the Control Send Queue
 370  * Prior to calling this function, drivers *MUST* set the following fields
 371  * in the cq->structure:
 372  *     - cq->num_sq_entries
 373  *     - cq->sq_buf_size
 374  *
 375  * Do *NOT* hold the lock when calling this as the memory allocation routines
 376  * called are not going to be atomic context safe
 377  */
 378 static enum ice_status ice_init_sq(struct ice_hw *hw, struct ice_ctl_q_info *cq)
 379 {
 380         enum ice_status ret_code;
 381
 382         if (cq->sq.count > 0) {
 383                 /* queue already initialized */
 384                 ret_code = ICE_ERR_NOT_READY;
 385                 goto init_ctrlq_exit;
 386         }
 387
 388         /* verify input for valid configuration */
 389         if (!cq->num_sq_entries || !cq->sq_buf_size) {
 390                 ret_code = ICE_ERR_CFG;
 391                 goto init_ctrlq_exit;
 392         }
 393
 394         cq->sq.next_to_use = 0;
 395         cq->sq.next_to_clean = 0;
 396
 397         /* allocate the ring memory */
 398         ret_code = ice_alloc_ctrlq_sq_ring(hw, cq);
 399         if (ret_code)
 400                 goto init_ctrlq_exit;
 401
 402         /* allocate buffers in the rings */
 403         ret_code = ice_alloc_sq_bufs(hw, cq);
 404         if (ret_code)
 405                 goto init_ctrlq_free_rings;
 406
 407         /* initialize base registers */
 408         ret_code = ice_cfg_sq_regs(hw, cq);
 409         if (ret_code)
 410                 goto init_ctrlq_free_rings;
 411
 412         /* success! */
 413         cq->sq.count = cq->num_sq_entries;
 414         goto init_ctrlq_exit;
 415
 416 init_ctrlq_free_rings:
 417         ice_free_ctrlq_sq_ring(hw, cq);
 418
 419 init_ctrlq_exit:
 420         return ret_code;
 421 }
 422
 423 /**
 424  * ice_init_rq - initialize ARQ
 425  * @hw: pointer to the hardware structure
 426  * @cq: pointer to the specific Control queue
 427  *
 428  * The main initialization routine for the Admin Receive (Event) Queue.
 429  * Prior to calling this function, drivers *MUST* set the following fields
 430  * in the cq->structure:
 431  *     - cq->num_rq_entries
 432  *     - cq->rq_buf_size
 433  *
 434  * Do *NOT* hold the lock when calling this as the memory allocation routines
 435  * called are not going to be atomic context safe
 436  */
 437 static enum ice_status ice_init_rq(struct ice_hw *hw, struct ice_ctl_q_info *cq)
 438 {
 439         enum ice_status ret_code;
 440
 441         if (cq->rq.count > 0) {
 442                 /* queue already initialized */
 443                 ret_code = ICE_ERR_NOT_READY;
 444                 goto init_ctrlq_exit;
 445         }
 446
 447         /* verify input for valid configuration */
 448         if (!cq->num_rq_entries || !cq->rq_buf_size) {
 449                 ret_code = ICE_ERR_CFG;
 450                 goto init_ctrlq_exit;
 451         }
 452
 453         cq->rq.next_to_use = 0;
 454         cq->rq.next_to_clean = 0;
 455
 456         /* allocate the ring memory */
 457         ret_code = ice_alloc_ctrlq_rq_ring(hw, cq);
 458         if (ret_code)
 459                 goto init_ctrlq_exit;
 460
 461         /* allocate buffers in the rings */
 462         ret_code = ice_alloc_rq_bufs(hw, cq);
 463         if (ret_code)
 464                 goto init_ctrlq_free_rings;
 465
 466         /* initialize base registers */
 467         ret_code = ice_cfg_rq_regs(hw, cq);
 468         if (ret_code)
 469                 goto init_ctrlq_free_rings;
 470
 471         /* success! */
 472         cq->rq.count = cq->num_rq_entries;
 473         goto init_ctrlq_exit;
 474
 475 init_ctrlq_free_rings:
 476         ice_free_ctrlq_rq_ring(hw, cq);
 477
 478 init_ctrlq_exit:
 479         return ret_code;
 480 }
 481
 482 /**
 483  * ice_shutdown_sq - shutdown the Control ATQ
 484  * @hw: pointer to the hardware structure
 485  * @cq: pointer to the specific Control queue
 486  *
 487  * The main shutdown routine for the Control Transmit Queue
 488  */
 489 static enum ice_status
 490 ice_shutdown_sq(struct ice_hw *hw, struct ice_ctl_q_info *cq)
 491 {
 492         enum ice_status ret_code = 0;
 493
 494         mutex_lock(&cq->sq_lock);
 495
 496         if (!cq->sq.count) {
 497                 ret_code = ICE_ERR_NOT_READY;
 498                 goto shutdown_sq_out;
 499         }
 500
 501         /* Stop firmware AdminQ processing */
 502         wr32(hw, cq->sq.head, 0);
 503         wr32(hw, cq->sq.tail, 0);
 504         wr32(hw, cq->sq.len, 0);
 505         wr32(hw, cq->sq.bal, 0);
 506         wr32(hw, cq->sq.bah, 0);
 507
 508         cq->sq.count = 0;       /* to indicate uninitialized queue */
 509
 510         /* free ring buffers and the ring itself */
 511         ice_free_sq_bufs(hw, cq);
 512         ice_free_ctrlq_sq_ring(hw, cq);
 513
 514 shutdown_sq_out:
 515         mutex_unlock(&cq->sq_lock);
 516         return ret_code;
 517 }
 518
 519 /**
 520  * ice_aq_ver_check - Check the reported AQ API version.
 521  * @hw: pointer to the hardware structure
 522  *
 523  * Checks if the driver should load on a given AQ API version.
 524  *
 525  * Return: 'true' iff the driver should attempt to load. 'false' otherwise.
 526  */
 527 static bool ice_aq_ver_check(struct ice_hw *hw)
 528 {
 529         if (hw->api_maj_ver > EXP_FW_API_VER_MAJOR) {
 530                 /* Major API version is newer than expected, don't load */
 531                 dev_warn(ice_hw_to_dev(hw),
 532                          "The driver for the device stopped because the NVM image is newer than expected. You must install the most recent version of the network driver.\n");
 533                 return false;
 534         } else if (hw->api_maj_ver == EXP_FW_API_VER_MAJOR) {
 535                 if (hw->api_min_ver > (EXP_FW_API_VER_MINOR + 2))
 536                         dev_info(ice_hw_to_dev(hw),
 537                                  "The driver for the device detected a newer version of the NVM image than expected. Please install the most recent version of the network driver.\n");
 538                 else if ((hw->api_min_ver + 2) < EXP_FW_API_VER_MINOR)
 539                         dev_info(ice_hw_to_dev(hw),
 540                                  "The driver for the device detected an older version of the NVM image than expected. Please update the NVM image.\n");
 541         } else {
 542                 /* Major API version is older than expected, log a warning */
 543                 dev_info(ice_hw_to_dev(hw),
 544                          "The driver for the device detected an older version of the NVM image than expected. Please update the NVM image.\n");
 545         }
 546         return true;
 547 }
 548
 549 /**
 550  * ice_shutdown_rq - shutdown Control ARQ
 551  * @hw: pointer to the hardware structure
 552  * @cq: pointer to the specific Control queue
 553  *
 554  * The main shutdown routine for the Control Receive Queue
 555  */
 556 static enum ice_status
 557 ice_shutdown_rq(struct ice_hw *hw, struct ice_ctl_q_info *cq)
 558 {
 559         enum ice_status ret_code = 0;
 560
 561         mutex_lock(&cq->rq_lock);
 562
 563         if (!cq->rq.count) {
 564                 ret_code = ICE_ERR_NOT_READY;
 565                 goto shutdown_rq_out;
 566         }
 567
 568         /* Stop Control Queue processing */
 569         wr32(hw, cq->rq.head, 0);
 570         wr32(hw, cq->rq.tail, 0);
 571         wr32(hw, cq->rq.len, 0);
 572         wr32(hw, cq->rq.bal, 0);
 573         wr32(hw, cq->rq.bah, 0);
 574
 575         /* set rq.count to 0 to indicate uninitialized queue */
 576         cq->rq.count = 0;
 577
 578         /* free ring buffers and the ring itself */
 579         ice_free_rq_bufs(hw, cq);
 580         ice_free_ctrlq_rq_ring(hw, cq);
 581
 582 shutdown_rq_out:
 583         mutex_unlock(&cq->rq_lock);
 584         return ret_code;
 585 }
 586
 587 /**
 588  * ice_init_check_adminq - Check version for Admin Queue to know if its alive
 589  * @hw: pointer to the hardware structure
 590  */
 591 static enum ice_status ice_init_check_adminq(struct ice_hw *hw)
 592 {
 593         struct ice_ctl_q_info *cq = &hw->adminq;
 594         enum ice_status status;
 595
 596         status = ice_aq_get_fw_ver(hw, NULL);
 597         if (status)
 598                 goto init_ctrlq_free_rq;
 599
 600         if (!ice_aq_ver_check(hw)) {
 601                 status = ICE_ERR_FW_API_VER;
 602                 goto init_ctrlq_free_rq;
 603         }
 604
 605         return 0;
 606
 607 init_ctrlq_free_rq:
 608         if (cq->rq.head) {
 609                 ice_shutdown_rq(hw, cq);
 610                 mutex_destroy(&cq->rq_lock);
 611         }
 612         if (cq->sq.head) {
 613                 ice_shutdown_sq(hw, cq);
 614                 mutex_destroy(&cq->sq_lock);
 615         }
 616         return status;
 617 }
 618
 619 /**
 620  * ice_init_ctrlq - main initialization routine for any control Queue
 621  * @hw: pointer to the hardware structure
 622  * @q_type: specific Control queue type
 623  *
 624  * Prior to calling this function, drivers *MUST* set the following fields
 625  * in the cq->structure:
 626  *     - cq->num_sq_entries
 627  *     - cq->num_rq_entries
 628  *     - cq->rq_buf_size
 629  *     - cq->sq_buf_size
 630  *
 631  */
 632 static enum ice_status ice_init_ctrlq(struct ice_hw *hw, enum ice_ctl_q q_type)
 633 {
 634         struct ice_ctl_q_info *cq;
 635         enum ice_status ret_code;
 636
 637         switch (q_type) {
 638         case ICE_CTL_Q_ADMIN:
 639                 ice_adminq_init_regs(hw);
 640                 cq = &hw->adminq;
 641                 break;
 642         default:
 643                 return ICE_ERR_PARAM;
 644         }
 645         cq->qtype = q_type;
 646
 647         /* verify input for valid configuration */
 648         if (!cq->num_rq_entries || !cq->num_sq_entries ||
 649             !cq->rq_buf_size || !cq->sq_buf_size) {
 650                 return ICE_ERR_CFG;
 651         }
 652         mutex_init(&cq->sq_lock);
 653         mutex_init(&cq->rq_lock);
 654
 655         /* setup SQ command write back timeout */
 656         cq->sq_cmd_timeout = ICE_CTL_Q_SQ_CMD_TIMEOUT;
 657
 658         /* allocate the ATQ */
 659         ret_code = ice_init_sq(hw, cq);
 660         if (ret_code)
 661                 goto init_ctrlq_destroy_locks;
 662
 663         /* allocate the ARQ */
 664         ret_code = ice_init_rq(hw, cq);
 665         if (ret_code)
 666                 goto init_ctrlq_free_sq;
 667
 668         /* success! */
 669         return 0;
 670
 671 init_ctrlq_free_sq:
 672         ice_shutdown_sq(hw, cq);
 673 init_ctrlq_destroy_locks:
 674         mutex_destroy(&cq->sq_lock);
 675         mutex_destroy(&cq->rq_lock);
 676         return ret_code;
 677 }
 678
 679 /**
 680  * ice_init_all_ctrlq - main initialization routine for all control queues
 681  * @hw: pointer to the hardware structure
 682  *
 683  * Prior to calling this function, drivers *MUST* set the following fields
 684  * in the cq->structure for all control queues:
 685  *     - cq->num_sq_entries
 686  *     - cq->num_rq_entries
 687  *     - cq->rq_buf_size
 688  *     - cq->sq_buf_size
 689  */
 690 enum ice_status ice_init_all_ctrlq(struct ice_hw *hw)
 691 {
 692         enum ice_status ret_code;
 693
 694         /* Init FW admin queue */
 695         ret_code = ice_init_ctrlq(hw, ICE_CTL_Q_ADMIN);
 696         if (ret_code)
 697                 return ret_code;
 698
 699         return ice_init_check_adminq(hw);
 700 }
 701
 702 /**
 703  * ice_shutdown_ctrlq - shutdown routine for any control queue
 704  * @hw: pointer to the hardware structure
 705  * @q_type: specific Control queue type
 706  */
 707 static void ice_shutdown_ctrlq(struct ice_hw *hw, enum ice_ctl_q q_type)
 708 {
 709         struct ice_ctl_q_info *cq;
 710
 711         switch (q_type) {
 712         case ICE_CTL_Q_ADMIN:
 713                 cq = &hw->adminq;
 714                 if (ice_check_sq_alive(hw, cq))
 715                         ice_aq_q_shutdown(hw, true);
 716                 break;
 717         default:
 718                 return;
 719         }
 720
 721         if (cq->sq.head) {
 722                 ice_shutdown_sq(hw, cq);
 723                 mutex_destroy(&cq->sq_lock);
 724         }
 725         if (cq->rq.head) {
 726                 ice_shutdown_rq(hw, cq);
 727                 mutex_destroy(&cq->rq_lock);
 728         }
 729 }
 730
 731 /**
 732  * ice_shutdown_all_ctrlq - shutdown routine for all control queues
 733  * @hw: pointer to the hardware structure
 734  */
 735 void ice_shutdown_all_ctrlq(struct ice_hw *hw)
 736 {
 737         /* Shutdown FW admin queue */
 738         ice_shutdown_ctrlq(hw, ICE_CTL_Q_ADMIN);
 739 }
 740
 741 /**
 742  * ice_clean_sq - cleans Admin send queue (ATQ)
 743  * @hw: pointer to the hardware structure
 744  * @cq: pointer to the specific Control queue
 745  *
 746  * returns the number of free desc
 747  */
 748 static u16 ice_clean_sq(struct ice_hw *hw, struct ice_ctl_q_info *cq)
 749 {
 750         struct ice_ctl_q_ring *sq = &cq->sq;
 751         u16 ntc = sq->next_to_clean;
 752         struct ice_sq_cd *details;
 753         struct ice_aq_desc *desc;
 754
 755         desc = ICE_CTL_Q_DESC(*sq, ntc);
 756         details = ICE_CTL_Q_DETAILS(*sq, ntc);
 757
 758         while (rd32(hw, cq->sq.head) != ntc) {
 759                 ice_debug(hw, ICE_DBG_AQ_MSG,
 760                           "ntc %d head %d.\n", ntc, rd32(hw, cq->sq.head));
 761                 memset(desc, 0, sizeof(*desc));
 762                 memset(details, 0, sizeof(*details));
 763                 ntc++;
 764                 if (ntc == sq->count)
 765                         ntc = 0;
 766                 desc = ICE_CTL_Q_DESC(*sq, ntc);
 767                 details = ICE_CTL_Q_DETAILS(*sq, ntc);
 768         }
 769
 770         sq->next_to_clean = ntc;
 771
 772         return ICE_CTL_Q_DESC_UNUSED(sq);
 773 }
 774
 775 /**
 776  * ice_sq_done - check if FW has processed the Admin Send Queue (ATQ)
 777  * @hw: pointer to the hw struct
 778  * @cq: pointer to the specific Control queue
 779  *
 780  * Returns true if the firmware has processed all descriptors on the
 781  * admin send queue. Returns false if there are still requests pending.
 782  */
 783 static bool ice_sq_done(struct ice_hw *hw, struct ice_ctl_q_info *cq)
 784 {
 785         /* AQ designers suggest use of head for better
 786          * timing reliability than DD bit
 787          */
 788         return rd32(hw, cq->sq.head) == cq->sq.next_to_use;
 789 }
 790
 791 /**
 792  * ice_sq_send_cmd - send command to Control Queue (ATQ)
 793  * @hw: pointer to the hw struct
 794  * @cq: pointer to the specific Control queue
 795  * @desc: prefilled descriptor describing the command (non DMA mem)
 796  * @buf: buffer to use for indirect commands (or NULL for direct commands)
 797  * @buf_size: size of buffer for indirect commands (or 0 for direct commands)
 798  * @cd: pointer to command details structure
 799  *
 800  * This is the main send command routine for the ATQ.  It runs the q,
 801  * cleans the queue, etc.
 802  */
 803 enum ice_status
 804 ice_sq_send_cmd(struct ice_hw *hw, struct ice_ctl_q_info *cq,
 805                 struct ice_aq_desc *desc, void *buf, u16 buf_size,
 806                 struct ice_sq_cd *cd)
 807 {
 808         struct ice_dma_mem *dma_buf = NULL;
 809         struct ice_aq_desc *desc_on_ring;
 810         bool cmd_completed = false;
 811         enum ice_status status = 0;
 812         struct ice_sq_cd *details;
 813         u32 total_delay = 0;
 814         u16 retval = 0;
 815         u32 val = 0;
 816
 817         /* if reset is in progress return a soft error */
 818         if (hw->reset_ongoing)
 819                 return ICE_ERR_RESET_ONGOING;
 820         mutex_lock(&cq->sq_lock);
 821
 822         cq->sq_last_status = ICE_AQ_RC_OK;
 823
 824         if (!cq->sq.count) {
 825                 ice_debug(hw, ICE_DBG_AQ_MSG,
 826                           "Control Send queue not initialized.\n");
 827                 status = ICE_ERR_AQ_EMPTY;
 828                 goto sq_send_command_error;
 829         }
 830
 831         if ((buf && !buf_size) || (!buf && buf_size)) {
 832                 status = ICE_ERR_PARAM;
 833                 goto sq_send_command_error;
 834         }
 835
 836         if (buf) {
 837                 if (buf_size > cq->sq_buf_size) {
 838                         ice_debug(hw, ICE_DBG_AQ_MSG,
 839                                   "Invalid buffer size for Control Send queue: %d.\n",
 840                                   buf_size);
 841                         status = ICE_ERR_INVAL_SIZE;
 842                         goto sq_send_command_error;
 843                 }
 844
 845                 desc->flags |= cpu_to_le16(ICE_AQ_FLAG_BUF);
 846                 if (buf_size > ICE_AQ_LG_BUF)
 847                         desc->flags |= cpu_to_le16(ICE_AQ_FLAG_LB);
 848         }
 849
 850         val = rd32(hw, cq->sq.head);
 851         if (val >= cq->num_sq_entries) {
 852                 ice_debug(hw, ICE_DBG_AQ_MSG,
 853                           "head overrun at %d in the Control Send Queue ring\n",
 854                           val);
 855                 status = ICE_ERR_AQ_EMPTY;
 856                 goto sq_send_command_error;
 857         }
 858
 859         details = ICE_CTL_Q_DETAILS(cq->sq, cq->sq.next_to_use);
 860         if (cd)
 861                 memcpy(details, cd, sizeof(*details));
 862         else
 863                 memset(details, 0, sizeof(*details));
 864
 865         /* Call clean and check queue available function to reclaim the
 866          * descriptors that were processed by FW/MBX; the function returns the
 867          * number of desc available. The clean function called here could be
 868          * called in a separate thread in case of asynchronous completions.
 869          */
 870         if (ice_clean_sq(hw, cq) == 0) {
 871                 ice_debug(hw, ICE_DBG_AQ_MSG,
 872                           "Error: Control Send Queue is full.\n");
 873                 status = ICE_ERR_AQ_FULL;
 874                 goto sq_send_command_error;
 875         }
 876
 877         /* initialize the temp desc pointer with the right desc */
 878         desc_on_ring = ICE_CTL_Q_DESC(cq->sq, cq->sq.next_to_use);
 879
 880         /* if the desc is available copy the temp desc to the right place */
 881         memcpy(desc_on_ring, desc, sizeof(*desc_on_ring));
 882
 883         /* if buf is not NULL assume indirect command */
 884         if (buf) {
 885                 dma_buf = &cq->sq.r.sq_bi[cq->sq.next_to_use];
 886                 /* copy the user buf into the respective DMA buf */
 887                 memcpy(dma_buf->va, buf, buf_size);
 888                 desc_on_ring->datalen = cpu_to_le16(buf_size);
 889
 890                 /* Update the address values in the desc with the pa value
 891                  * for respective buffer
 892                  */
 893                 desc_on_ring->params.generic.addr_high =
 894                         cpu_to_le32(upper_32_bits(dma_buf->pa));
 895                 desc_on_ring->params.generic.addr_low =
 896                         cpu_to_le32(lower_32_bits(dma_buf->pa));
 897         }
 898
 899         /* Debug desc and buffer */
 900         ice_debug(hw, ICE_DBG_AQ_MSG,
 901                   "ATQ: Control Send queue desc and buffer:\n");
 902
 903         ice_debug_cq(hw, ICE_DBG_AQ_CMD, (void *)desc_on_ring, buf, buf_size);
 904
 905         (cq->sq.next_to_use)++;
 906         if (cq->sq.next_to_use == cq->sq.count)
 907                 cq->sq.next_to_use = 0;
 908         wr32(hw, cq->sq.tail, cq->sq.next_to_use);
 909
 910         do {
 911                 if (ice_sq_done(hw, cq))
 912                         break;
 913
 914                 udelay(ICE_CTL_Q_SQ_CMD_USEC);
 915                 total_delay++;
 916         } while (total_delay < cq->sq_cmd_timeout);
 917
 918         /* if ready, copy the desc back to temp */
 919         if (ice_sq_done(hw, cq)) {
 920                 memcpy(desc, desc_on_ring, sizeof(*desc));
 921                 if (buf) {
 922                         /* get returned length to copy */
 923                         u16 copy_size = le16_to_cpu(desc->datalen);
 924
 925                         if (copy_size > buf_size) {
 926                                 ice_debug(hw, ICE_DBG_AQ_MSG,
 927                                           "Return len %d > than buf len %d\n",
 928                                           copy_size, buf_size);
 929                                 status = ICE_ERR_AQ_ERROR;
 930                         } else {
 931                                 memcpy(buf, dma_buf->va, copy_size);
 932                         }
 933                 }
 934                 retval = le16_to_cpu(desc->retval);
 935                 if (retval) {
 936                         ice_debug(hw, ICE_DBG_AQ_MSG,
 937                                   "Control Send Queue command completed with error 0x%x\n",
 938                                   retval);
 939
 940                         /* strip off FW internal code */
 941                         retval &= 0xff;
 942                 }
 943                 cmd_completed = true;
 944                 if (!status && retval != ICE_AQ_RC_OK)
 945                         status = ICE_ERR_AQ_ERROR;
 946                 cq->sq_last_status = (enum ice_aq_err)retval;
 947         }
 948
 949         ice_debug(hw, ICE_DBG_AQ_MSG,
 950                   "ATQ: desc and buffer writeback:\n");
 951
 952         ice_debug_cq(hw, ICE_DBG_AQ_CMD, (void *)desc, buf, buf_size);
 953
 954         /* save writeback AQ if requested */
 955         if (details->wb_desc)
 956                 memcpy(details->wb_desc, desc_on_ring,
 957                        sizeof(*details->wb_desc));
 958
 959         /* update the error if time out occurred */
 960         if (!cmd_completed) {
 961                 ice_debug(hw, ICE_DBG_AQ_MSG,
 962                           "Control Send Queue Writeback timeout.\n");
 963                 status = ICE_ERR_AQ_TIMEOUT;
 964         }
 965
 966 sq_send_command_error:
 967         mutex_unlock(&cq->sq_lock);
 968         return status;
 969 }
 970
 971 /**
 972  * ice_fill_dflt_direct_cmd_desc - AQ descriptor helper function
 973  * @desc: pointer to the temp descriptor (non DMA mem)
 974  * @opcode: the opcode can be used to decide which flags to turn off or on
 975  *
 976  * Fill the desc with default values
 977  */
 978 void ice_fill_dflt_direct_cmd_desc(struct ice_aq_desc *desc, u16 opcode)
 979 {
 980         /* zero out the desc */
 981         memset(desc, 0, sizeof(*desc));
 982         desc->opcode = cpu_to_le16(opcode);
 983         desc->flags = cpu_to_le16(ICE_AQ_FLAG_SI);
 984 }
 985
 986 /**
 987  * ice_clean_rq_elem
 988  * @hw: pointer to the hw struct
 989  * @cq: pointer to the specific Control queue
 990  * @e: event info from the receive descriptor, includes any buffers
 991  * @pending: number of events that could be left to process
 992  *
 993  * This function cleans one Admin Receive Queue element and returns
 994  * the contents through e.  It can also return how many events are
 995  * left to process through 'pending'.
 996  */
 997 enum ice_status
 998 ice_clean_rq_elem(struct ice_hw *hw, struct ice_ctl_q_info *cq,
 999                   struct ice_rq_event_info *e, u16 *pending)
1000 {
1001         u16 ntc = cq->rq.next_to_clean;
1002         enum ice_status ret_code = 0;
1003         struct ice_aq_desc *desc;
1004         struct ice_dma_mem *bi;
1005         u16 desc_idx;
1006         u16 datalen;
1007         u16 flags;
1008         u16 ntu;
1009
1010         /* pre-clean the event info */
1011         memset(&e->desc, 0, sizeof(e->desc));
1012
1013         /* take the lock before we start messing with the ring */
1014         mutex_lock(&cq->rq_lock);
1015
1016         if (!cq->rq.count) {
1017                 ice_debug(hw, ICE_DBG_AQ_MSG,
1018                           "Control Receive queue not initialized.\n");
1019                 ret_code = ICE_ERR_AQ_EMPTY;
1020                 goto clean_rq_elem_err;
1021         }
1022
1023         /* set next_to_use to head */
1024         ntu = (u16)(rd32(hw, cq->rq.head) & cq->rq.head_mask);
1025
1026         if (ntu == ntc) {
1027                 /* nothing to do - shouldn't need to update ring's values */
1028                 ret_code = ICE_ERR_AQ_NO_WORK;
1029                 goto clean_rq_elem_out;
1030         }
1031
1032         /* now clean the next descriptor */
1033         desc = ICE_CTL_Q_DESC(cq->rq, ntc);
1034         desc_idx = ntc;
1035
1036         cq->rq_last_status = (enum ice_aq_err)le16_to_cpu(desc->retval);
1037         flags = le16_to_cpu(desc->flags);
1038         if (flags & ICE_AQ_FLAG_ERR) {
1039                 ret_code = ICE_ERR_AQ_ERROR;
1040                 ice_debug(hw, ICE_DBG_AQ_MSG,
1041                           "Control Receive Queue Event received with error 0x%x\n",
1042                           cq->rq_last_status);
1043         }
1044         memcpy(&e->desc, desc, sizeof(e->desc));
1045         datalen = le16_to_cpu(desc->datalen);
1046         e->msg_len = min(datalen, e->buf_len);
1047         if (e->msg_buf && e->msg_len)
1048                 memcpy(e->msg_buf, cq->rq.r.rq_bi[desc_idx].va, e->msg_len);
1049
1050         ice_debug(hw, ICE_DBG_AQ_MSG, "ARQ: desc and buffer:\n");
1051
1052         ice_debug_cq(hw, ICE_DBG_AQ_CMD, (void *)desc, e->msg_buf,
1053                      cq->rq_buf_size);
1054
1055         /* Restore the original datalen and buffer address in the desc,
1056          * FW updates datalen to indicate the event message size
1057          */
1058         bi = &cq->rq.r.rq_bi[ntc];
1059         memset(desc, 0, sizeof(*desc));
1060
1061         desc->flags = cpu_to_le16(ICE_AQ_FLAG_BUF);
1062         if (cq->rq_buf_size > ICE_AQ_LG_BUF)
1063                 desc->flags |= cpu_to_le16(ICE_AQ_FLAG_LB);
1064         desc->datalen = cpu_to_le16(bi->size);
1065         desc->params.generic.addr_high = cpu_to_le32(upper_32_bits(bi->pa));
1066         desc->params.generic.addr_low = cpu_to_le32(lower_32_bits(bi->pa));
1067
1068         /* set tail = the last cleaned desc index. */
1069         wr32(hw, cq->rq.tail, ntc);
1070         /* ntc is updated to tail + 1 */
1071         ntc++;
1072         if (ntc == cq->num_rq_entries)
1073                 ntc = 0;
1074         cq->rq.next_to_clean = ntc;
1075         cq->rq.next_to_use = ntu;
1076
1077 clean_rq_elem_out:
1078         /* Set pending if needed, unlock and return */
1079         if (pending) {
1080                 /* re-read HW head to calculate actual pending messages */
1081                 ntu = (u16)(rd32(hw, cq->rq.head) & cq->rq.head_mask);
1082                 *pending = (u16)((ntc > ntu ? cq->rq.count : 0) + (ntu - ntc));
1083         }
1084 clean_rq_elem_err:
1085         mutex_unlock(&cq->rq_lock);
1086
1087         return ret_code;
1088 }