drivers/net/wireless/ath/ath10k/ce.c

   1 /*
   2  * Copyright (c) 2005-2011 Atheros Communications Inc.
   3  * Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #include "hif.h"
  19 #include "pci.h"
  20 #include "ce.h"
  21 #include "debug.h"
  22
  23 /*
  24  * Support for Copy Engine hardware, which is mainly used for
  25  * communication between Host and Target over a PCIe interconnect.
  26  */
  27
  28 /*
  29  * A single CopyEngine (CE) comprises two "rings":
  30  *   a source ring
  31  *   a destination ring
  32  *
  33  * Each ring consists of a number of descriptors which specify
  34  * an address, length, and meta-data.
  35  *
  36  * Typically, one side of the PCIe interconnect (Host or Target)
  37  * controls one ring and the other side controls the other ring.
  38  * The source side chooses when to initiate a transfer and it
  39  * chooses what to send (buffer address, length). The destination
  40  * side keeps a supply of "anonymous receive buffers" available and
  41  * it handles incoming data as it arrives (when the destination
  42  * recieves an interrupt).
  43  *
  44  * The sender may send a simple buffer (address/length) or it may
  45  * send a small list of buffers.  When a small list is sent, hardware
  46  * "gathers" these and they end up in a single destination buffer
  47  * with a single interrupt.
  48  *
  49  * There are several "contexts" managed by this layer -- more, it
  50  * may seem -- than should be needed. These are provided mainly for
  51  * maximum flexibility and especially to facilitate a simpler HIF
  52  * implementation. There are per-CopyEngine recv, send, and watermark
  53  * contexts. These are supplied by the caller when a recv, send,
  54  * or watermark handler is established and they are echoed back to
  55  * the caller when the respective callbacks are invoked. There is
  56  * also a per-transfer context supplied by the caller when a buffer
  57  * (or sendlist) is sent and when a buffer is enqueued for recv.
  58  * These per-transfer contexts are echoed back to the caller when
  59  * the buffer is sent/received.
  60  */
  61
  62 static inline void ath10k_ce_dest_ring_write_index_set(struct ath10k *ar,
  63                                                        u32 ce_ctrl_addr,
  64                                                        unsigned int n)
  65 {
  66         ath10k_pci_write32(ar, ce_ctrl_addr + DST_WR_INDEX_ADDRESS, n);
  67 }
  68
  69 static inline u32 ath10k_ce_dest_ring_write_index_get(struct ath10k *ar,
  70                                                       u32 ce_ctrl_addr)
  71 {
  72         return ath10k_pci_read32(ar, ce_ctrl_addr + DST_WR_INDEX_ADDRESS);
  73 }
  74
  75 static inline void ath10k_ce_src_ring_write_index_set(struct ath10k *ar,
  76                                                       u32 ce_ctrl_addr,
  77                                                       unsigned int n)
  78 {
  79         ath10k_pci_write32(ar, ce_ctrl_addr + SR_WR_INDEX_ADDRESS, n);
  80 }
  81
  82 static inline u32 ath10k_ce_src_ring_write_index_get(struct ath10k *ar,
  83                                                      u32 ce_ctrl_addr)
  84 {
  85         return ath10k_pci_read32(ar, ce_ctrl_addr + SR_WR_INDEX_ADDRESS);
  86 }
  87
  88 static inline u32 ath10k_ce_src_ring_read_index_get(struct ath10k *ar,
  89                                                     u32 ce_ctrl_addr)
  90 {
  91         return ath10k_pci_read32(ar, ce_ctrl_addr + CURRENT_SRRI_ADDRESS);
  92 }
  93
  94 static inline void ath10k_ce_src_ring_base_addr_set(struct ath10k *ar,
  95                                                     u32 ce_ctrl_addr,
  96                                                     unsigned int addr)
  97 {
  98         ath10k_pci_write32(ar, ce_ctrl_addr + SR_BA_ADDRESS, addr);
  99 }
 100
 101 static inline void ath10k_ce_src_ring_size_set(struct ath10k *ar,
 102                                                u32 ce_ctrl_addr,
 103                                                unsigned int n)
 104 {
 105         ath10k_pci_write32(ar, ce_ctrl_addr + SR_SIZE_ADDRESS, n);
 106 }
 107
 108 static inline void ath10k_ce_src_ring_dmax_set(struct ath10k *ar,
 109                                                u32 ce_ctrl_addr,
 110                                                unsigned int n)
 111 {
 112         u32 ctrl1_addr = ath10k_pci_read32((ar),
 113                                            (ce_ctrl_addr) + CE_CTRL1_ADDRESS);
 114
 115         ath10k_pci_write32(ar, ce_ctrl_addr + CE_CTRL1_ADDRESS,
 116                            (ctrl1_addr &  ~CE_CTRL1_DMAX_LENGTH_MASK) |
 117                            CE_CTRL1_DMAX_LENGTH_SET(n));
 118 }
 119
 120 static inline void ath10k_ce_src_ring_byte_swap_set(struct ath10k *ar,
 121                                                     u32 ce_ctrl_addr,
 122                                                     unsigned int n)
 123 {
 124         u32 ctrl1_addr = ath10k_pci_read32(ar, ce_ctrl_addr + CE_CTRL1_ADDRESS);
 125
 126         ath10k_pci_write32(ar, ce_ctrl_addr + CE_CTRL1_ADDRESS,
 127                            (ctrl1_addr & ~CE_CTRL1_SRC_RING_BYTE_SWAP_EN_MASK) |
 128                            CE_CTRL1_SRC_RING_BYTE_SWAP_EN_SET(n));
 129 }
 130
 131 static inline void ath10k_ce_dest_ring_byte_swap_set(struct ath10k *ar,
 132                                                      u32 ce_ctrl_addr,
 133                                                      unsigned int n)
 134 {
 135         u32 ctrl1_addr = ath10k_pci_read32(ar, ce_ctrl_addr + CE_CTRL1_ADDRESS);
 136
 137         ath10k_pci_write32(ar, ce_ctrl_addr + CE_CTRL1_ADDRESS,
 138                            (ctrl1_addr & ~CE_CTRL1_DST_RING_BYTE_SWAP_EN_MASK) |
 139                            CE_CTRL1_DST_RING_BYTE_SWAP_EN_SET(n));
 140 }
 141
 142 static inline u32 ath10k_ce_dest_ring_read_index_get(struct ath10k *ar,
 143                                                      u32 ce_ctrl_addr)
 144 {
 145         return ath10k_pci_read32(ar, ce_ctrl_addr + CURRENT_DRRI_ADDRESS);
 146 }
 147
 148 static inline void ath10k_ce_dest_ring_base_addr_set(struct ath10k *ar,
 149                                                      u32 ce_ctrl_addr,
 150                                                      u32 addr)
 151 {
 152         ath10k_pci_write32(ar, ce_ctrl_addr + DR_BA_ADDRESS, addr);
 153 }
 154
 155 static inline void ath10k_ce_dest_ring_size_set(struct ath10k *ar,
 156                                                 u32 ce_ctrl_addr,
 157                                                 unsigned int n)
 158 {
 159         ath10k_pci_write32(ar, ce_ctrl_addr + DR_SIZE_ADDRESS, n);
 160 }
 161
 162 static inline void ath10k_ce_src_ring_highmark_set(struct ath10k *ar,
 163                                                    u32 ce_ctrl_addr,
 164                                                    unsigned int n)
 165 {
 166         u32 addr = ath10k_pci_read32(ar, ce_ctrl_addr + SRC_WATERMARK_ADDRESS);
 167
 168         ath10k_pci_write32(ar, ce_ctrl_addr + SRC_WATERMARK_ADDRESS,
 169                            (addr & ~SRC_WATERMARK_HIGH_MASK) |
 170                            SRC_WATERMARK_HIGH_SET(n));
 171 }
 172
 173 static inline void ath10k_ce_src_ring_lowmark_set(struct ath10k *ar,
 174                                                   u32 ce_ctrl_addr,
 175                                                   unsigned int n)
 176 {
 177         u32 addr = ath10k_pci_read32(ar, ce_ctrl_addr + SRC_WATERMARK_ADDRESS);
 178
 179         ath10k_pci_write32(ar, ce_ctrl_addr + SRC_WATERMARK_ADDRESS,
 180                            (addr & ~SRC_WATERMARK_LOW_MASK) |
 181                            SRC_WATERMARK_LOW_SET(n));
 182 }
 183
 184 static inline void ath10k_ce_dest_ring_highmark_set(struct ath10k *ar,
 185                                                     u32 ce_ctrl_addr,
 186                                                     unsigned int n)
 187 {
 188         u32 addr = ath10k_pci_read32(ar, ce_ctrl_addr + DST_WATERMARK_ADDRESS);
 189
 190         ath10k_pci_write32(ar, ce_ctrl_addr + DST_WATERMARK_ADDRESS,
 191                            (addr & ~DST_WATERMARK_HIGH_MASK) |
 192                            DST_WATERMARK_HIGH_SET(n));
 193 }
 194
 195 static inline void ath10k_ce_dest_ring_lowmark_set(struct ath10k *ar,
 196                                                    u32 ce_ctrl_addr,
 197                                                    unsigned int n)
 198 {
 199         u32 addr = ath10k_pci_read32(ar, ce_ctrl_addr + DST_WATERMARK_ADDRESS);
 200
 201         ath10k_pci_write32(ar, ce_ctrl_addr + DST_WATERMARK_ADDRESS,
 202                            (addr & ~DST_WATERMARK_LOW_MASK) |
 203                            DST_WATERMARK_LOW_SET(n));
 204 }
 205
 206 static inline void ath10k_ce_copy_complete_inter_enable(struct ath10k *ar,
 207                                                         u32 ce_ctrl_addr)
 208 {
 209         u32 host_ie_addr = ath10k_pci_read32(ar,
 210                                              ce_ctrl_addr + HOST_IE_ADDRESS);
 211
 212         ath10k_pci_write32(ar, ce_ctrl_addr + HOST_IE_ADDRESS,
 213                            host_ie_addr | HOST_IE_COPY_COMPLETE_MASK);
 214 }
 215
 216 static inline void ath10k_ce_copy_complete_intr_disable(struct ath10k *ar,
 217                                                         u32 ce_ctrl_addr)
 218 {
 219         u32 host_ie_addr = ath10k_pci_read32(ar,
 220                                              ce_ctrl_addr + HOST_IE_ADDRESS);
 221
 222         ath10k_pci_write32(ar, ce_ctrl_addr + HOST_IE_ADDRESS,
 223                            host_ie_addr & ~HOST_IE_COPY_COMPLETE_MASK);
 224 }
 225
 226 static inline void ath10k_ce_watermark_intr_disable(struct ath10k *ar,
 227                                                     u32 ce_ctrl_addr)
 228 {
 229         u32 host_ie_addr = ath10k_pci_read32(ar,
 230                                              ce_ctrl_addr + HOST_IE_ADDRESS);
 231
 232         ath10k_pci_write32(ar, ce_ctrl_addr + HOST_IE_ADDRESS,
 233                            host_ie_addr & ~CE_WATERMARK_MASK);
 234 }
 235
 236 static inline void ath10k_ce_error_intr_enable(struct ath10k *ar,
 237                                                u32 ce_ctrl_addr)
 238 {
 239         u32 misc_ie_addr = ath10k_pci_read32(ar,
 240                                              ce_ctrl_addr + MISC_IE_ADDRESS);
 241
 242         ath10k_pci_write32(ar, ce_ctrl_addr + MISC_IE_ADDRESS,
 243                            misc_ie_addr | CE_ERROR_MASK);
 244 }
 245
 246 static inline void ath10k_ce_engine_int_status_clear(struct ath10k *ar,
 247                                                      u32 ce_ctrl_addr,
 248                                                      unsigned int mask)
 249 {
 250         ath10k_pci_write32(ar, ce_ctrl_addr + HOST_IS_ADDRESS, mask);
 251 }
 252
 253
 254 /*
 255  * Guts of ath10k_ce_send, used by both ath10k_ce_send and
 256  * ath10k_ce_sendlist_send.
 257  * The caller takes responsibility for any needed locking.
 258  */
 259 static int ath10k_ce_send_nolock(struct ath10k_ce_pipe *ce_state,
 260                                  void *per_transfer_context,
 261                                  u32 buffer,
 262                                  unsigned int nbytes,
 263                                  unsigned int transfer_id,
 264                                  unsigned int flags)
 265 {
 266         struct ath10k *ar = ce_state->ar;
 267         struct ath10k_ce_ring *src_ring = ce_state->src_ring;
 268         struct ce_desc *desc, *sdesc;
 269         unsigned int nentries_mask = src_ring->nentries_mask;
 270         unsigned int sw_index = src_ring->sw_index;
 271         unsigned int write_index = src_ring->write_index;
 272         u32 ctrl_addr = ce_state->ctrl_addr;
 273         u32 desc_flags = 0;
 274         int ret = 0;
 275
 276         if (nbytes > ce_state->src_sz_max)
 277                 ath10k_warn("%s: send more we can (nbytes: %d, max: %d)\n",
 278                             __func__, nbytes, ce_state->src_sz_max);
 279
 280         ath10k_pci_wake(ar);
 281
 282         if (unlikely(CE_RING_DELTA(nentries_mask,
 283                                    write_index, sw_index - 1) <= 0)) {
 284                 ret = -EIO;
 285                 goto exit;
 286         }
 287
 288         desc = CE_SRC_RING_TO_DESC(src_ring->base_addr_owner_space,
 289                                    write_index);
 290         sdesc = CE_SRC_RING_TO_DESC(src_ring->shadow_base, write_index);
 291
 292         desc_flags |= SM(transfer_id, CE_DESC_FLAGS_META_DATA);
 293
 294         if (flags & CE_SEND_FLAG_GATHER)
 295                 desc_flags |= CE_DESC_FLAGS_GATHER;
 296         if (flags & CE_SEND_FLAG_BYTE_SWAP)
 297                 desc_flags |= CE_DESC_FLAGS_BYTE_SWAP;
 298
 299         sdesc->addr   = __cpu_to_le32(buffer);
 300         sdesc->nbytes = __cpu_to_le16(nbytes);
 301         sdesc->flags  = __cpu_to_le16(desc_flags);
 302
 303         *desc = *sdesc;
 304
 305         src_ring->per_transfer_context[write_index] = per_transfer_context;
 306
 307         /* Update Source Ring Write Index */
 308         write_index = CE_RING_IDX_INCR(nentries_mask, write_index);
 309
 310         /* WORKAROUND */
 311         if (!(flags & CE_SEND_FLAG_GATHER))
 312                 ath10k_ce_src_ring_write_index_set(ar, ctrl_addr, write_index);
 313
 314         src_ring->write_index = write_index;
 315 exit:
 316         ath10k_pci_sleep(ar);
 317         return ret;
 318 }
 319
 320 int ath10k_ce_send(struct ath10k_ce_pipe *ce_state,
 321                    void *per_transfer_context,
 322                    u32 buffer,
 323                    unsigned int nbytes,
 324                    unsigned int transfer_id,
 325                    unsigned int flags)
 326 {
 327         struct ath10k *ar = ce_state->ar;
 328         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 329         int ret;
 330
 331         spin_lock_bh(&ar_pci->ce_lock);
 332         ret = ath10k_ce_send_nolock(ce_state, per_transfer_context,
 333                                     buffer, nbytes, transfer_id, flags);
 334         spin_unlock_bh(&ar_pci->ce_lock);
 335
 336         return ret;
 337 }
 338
 339 void ath10k_ce_sendlist_buf_add(struct ce_sendlist *sendlist, u32 buffer,
 340                                 unsigned int nbytes, u32 flags)
 341 {
 342         unsigned int num_items = sendlist->num_items;
 343         struct ce_sendlist_item *item;
 344
 345         item = &sendlist->item[num_items];
 346         item->data = buffer;
 347         item->u.nbytes = nbytes;
 348         item->flags = flags;
 349         sendlist->num_items++;
 350 }
 351
 352 int ath10k_ce_sendlist_send(struct ath10k_ce_pipe *ce_state,
 353                             void *per_transfer_context,
 354                             struct ce_sendlist *sendlist,
 355                             unsigned int transfer_id)
 356 {
 357         struct ath10k_ce_ring *src_ring = ce_state->src_ring;
 358         struct ce_sendlist_item *item;
 359         struct ath10k *ar = ce_state->ar;
 360         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 361         unsigned int nentries_mask = src_ring->nentries_mask;
 362         unsigned int num_items = sendlist->num_items;
 363         unsigned int sw_index;
 364         unsigned int write_index;
 365         int i, delta, ret = -ENOMEM;
 366
 367         spin_lock_bh(&ar_pci->ce_lock);
 368
 369         sw_index = src_ring->sw_index;
 370         write_index = src_ring->write_index;
 371
 372         delta = CE_RING_DELTA(nentries_mask, write_index, sw_index - 1);
 373
 374         if (delta >= num_items) {
 375                 /*
 376                  * Handle all but the last item uniformly.
 377                  */
 378                 for (i = 0; i < num_items - 1; i++) {
 379                         item = &sendlist->item[i];
 380                         ret = ath10k_ce_send_nolock(ce_state,
 381                                                     CE_SENDLIST_ITEM_CTXT,
 382                                                     (u32) item->data,
 383                                                     item->u.nbytes, transfer_id,
 384                                                     item->flags |
 385                                                     CE_SEND_FLAG_GATHER);
 386                         if (ret)
 387                                 ath10k_warn("CE send failed for item: %d\n", i);
 388                 }
 389                 /*
 390                  * Provide valid context pointer for final item.
 391                  */
 392                 item = &sendlist->item[i];
 393                 ret = ath10k_ce_send_nolock(ce_state, per_transfer_context,
 394                                             (u32) item->data, item->u.nbytes,
 395                                             transfer_id, item->flags);
 396                 if (ret)
 397                         ath10k_warn("CE send failed for last item: %d\n", i);
 398         }
 399
 400         spin_unlock_bh(&ar_pci->ce_lock);
 401
 402         return ret;
 403 }
 404
 405 int ath10k_ce_recv_buf_enqueue(struct ath10k_ce_pipe *ce_state,
 406                                void *per_recv_context,
 407                                u32 buffer)
 408 {
 409         struct ath10k_ce_ring *dest_ring = ce_state->dest_ring;
 410         u32 ctrl_addr = ce_state->ctrl_addr;
 411         struct ath10k *ar = ce_state->ar;
 412         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 413         unsigned int nentries_mask = dest_ring->nentries_mask;
 414         unsigned int write_index;
 415         unsigned int sw_index;
 416         int ret;
 417
 418         spin_lock_bh(&ar_pci->ce_lock);
 419         write_index = dest_ring->write_index;
 420         sw_index = dest_ring->sw_index;
 421
 422         ath10k_pci_wake(ar);
 423
 424         if (CE_RING_DELTA(nentries_mask, write_index, sw_index - 1) > 0) {
 425                 struct ce_desc *base = dest_ring->base_addr_owner_space;
 426                 struct ce_desc *desc = CE_DEST_RING_TO_DESC(base, write_index);
 427
 428                 /* Update destination descriptor */
 429                 desc->addr    = __cpu_to_le32(buffer);
 430                 desc->nbytes = 0;
 431
 432                 dest_ring->per_transfer_context[write_index] =
 433                                                         per_recv_context;
 434
 435                 /* Update Destination Ring Write Index */
 436                 write_index = CE_RING_IDX_INCR(nentries_mask, write_index);
 437                 ath10k_ce_dest_ring_write_index_set(ar, ctrl_addr, write_index);
 438                 dest_ring->write_index = write_index;
 439                 ret = 0;
 440         } else {
 441                 ret = -EIO;
 442         }
 443         ath10k_pci_sleep(ar);
 444         spin_unlock_bh(&ar_pci->ce_lock);
 445
 446         return ret;
 447 }
 448
 449 /*
 450  * Guts of ath10k_ce_completed_recv_next.
 451  * The caller takes responsibility for any necessary locking.
 452  */
 453 static int ath10k_ce_completed_recv_next_nolock(struct ath10k_ce_pipe *ce_state,
 454                                                 void **per_transfer_contextp,
 455                                                 u32 *bufferp,
 456                                                 unsigned int *nbytesp,
 457                                                 unsigned int *transfer_idp,
 458                                                 unsigned int *flagsp)
 459 {
 460         struct ath10k_ce_ring *dest_ring = ce_state->dest_ring;
 461         unsigned int nentries_mask = dest_ring->nentries_mask;
 462         unsigned int sw_index = dest_ring->sw_index;
 463
 464         struct ce_desc *base = dest_ring->base_addr_owner_space;
 465         struct ce_desc *desc = CE_DEST_RING_TO_DESC(base, sw_index);
 466         struct ce_desc sdesc;
 467         u16 nbytes;
 468
 469         /* Copy in one go for performance reasons */
 470         sdesc = *desc;
 471
 472         nbytes = __le16_to_cpu(sdesc.nbytes);
 473         if (nbytes == 0) {
 474                 /*
 475                  * This closes a relatively unusual race where the Host
 476                  * sees the updated DRRI before the update to the
 477                  * corresponding descriptor has completed. We treat this
 478                  * as a descriptor that is not yet done.
 479                  */
 480                 return -EIO;
 481         }
 482
 483         desc->nbytes = 0;
 484
 485         /* Return data from completed destination descriptor */
 486         *bufferp = __le32_to_cpu(sdesc.addr);
 487         *nbytesp = nbytes;
 488         *transfer_idp = MS(__le16_to_cpu(sdesc.flags), CE_DESC_FLAGS_META_DATA);
 489
 490         if (__le16_to_cpu(sdesc.flags) & CE_DESC_FLAGS_BYTE_SWAP)
 491                 *flagsp = CE_RECV_FLAG_SWAPPED;
 492         else
 493                 *flagsp = 0;
 494
 495         if (per_transfer_contextp)
 496                 *per_transfer_contextp =
 497                         dest_ring->per_transfer_context[sw_index];
 498
 499         /* sanity */
 500         dest_ring->per_transfer_context[sw_index] = NULL;
 501
 502         /* Update sw_index */
 503         sw_index = CE_RING_IDX_INCR(nentries_mask, sw_index);
 504         dest_ring->sw_index = sw_index;
 505
 506         return 0;
 507 }
 508
 509 int ath10k_ce_completed_recv_next(struct ath10k_ce_pipe *ce_state,
 510                                   void **per_transfer_contextp,
 511                                   u32 *bufferp,
 512                                   unsigned int *nbytesp,
 513                                   unsigned int *transfer_idp,
 514                                   unsigned int *flagsp)
 515 {
 516         struct ath10k *ar = ce_state->ar;
 517         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 518         int ret;
 519
 520         spin_lock_bh(&ar_pci->ce_lock);
 521         ret = ath10k_ce_completed_recv_next_nolock(ce_state,
 522                                                    per_transfer_contextp,
 523                                                    bufferp, nbytesp,
 524                                                    transfer_idp, flagsp);
 525         spin_unlock_bh(&ar_pci->ce_lock);
 526
 527         return ret;
 528 }
 529
 530 int ath10k_ce_revoke_recv_next(struct ath10k_ce_pipe *ce_state,
 531                                void **per_transfer_contextp,
 532                                u32 *bufferp)
 533 {
 534         struct ath10k_ce_ring *dest_ring;
 535         unsigned int nentries_mask;
 536         unsigned int sw_index;
 537         unsigned int write_index;
 538         int ret;
 539         struct ath10k *ar;
 540         struct ath10k_pci *ar_pci;
 541
 542         dest_ring = ce_state->dest_ring;
 543
 544         if (!dest_ring)
 545                 return -EIO;
 546
 547         ar = ce_state->ar;
 548         ar_pci = ath10k_pci_priv(ar);
 549
 550         spin_lock_bh(&ar_pci->ce_lock);
 551
 552         nentries_mask = dest_ring->nentries_mask;
 553         sw_index = dest_ring->sw_index;
 554         write_index = dest_ring->write_index;
 555         if (write_index != sw_index) {
 556                 struct ce_desc *base = dest_ring->base_addr_owner_space;
 557                 struct ce_desc *desc = CE_DEST_RING_TO_DESC(base, sw_index);
 558
 559                 /* Return data from completed destination descriptor */
 560                 *bufferp = __le32_to_cpu(desc->addr);
 561
 562                 if (per_transfer_contextp)
 563                         *per_transfer_contextp =
 564                                 dest_ring->per_transfer_context[sw_index];
 565
 566                 /* sanity */
 567                 dest_ring->per_transfer_context[sw_index] = NULL;
 568
 569                 /* Update sw_index */
 570                 sw_index = CE_RING_IDX_INCR(nentries_mask, sw_index);
 571                 dest_ring->sw_index = sw_index;
 572                 ret = 0;
 573         } else {
 574                 ret = -EIO;
 575         }
 576
 577         spin_unlock_bh(&ar_pci->ce_lock);
 578
 579         return ret;
 580 }
 581
 582 /*
 583  * Guts of ath10k_ce_completed_send_next.
 584  * The caller takes responsibility for any necessary locking.
 585  */
 586 static int ath10k_ce_completed_send_next_nolock(struct ath10k_ce_pipe *ce_state,
 587                                                 void **per_transfer_contextp,
 588                                                 u32 *bufferp,
 589                                                 unsigned int *nbytesp,
 590                                                 unsigned int *transfer_idp)
 591 {
 592         struct ath10k_ce_ring *src_ring = ce_state->src_ring;
 593         u32 ctrl_addr = ce_state->ctrl_addr;
 594         struct ath10k *ar = ce_state->ar;
 595         unsigned int nentries_mask = src_ring->nentries_mask;
 596         unsigned int sw_index = src_ring->sw_index;
 597         struct ce_desc *sdesc, *sbase;
 598         unsigned int read_index;
 599
 600         if (src_ring->hw_index == sw_index) {
 601                 /*
 602                  * The SW completion index has caught up with the cached
 603                  * version of the HW completion index.
 604                  * Update the cached HW completion index to see whether
 605                  * the SW has really caught up to the HW, or if the cached
 606                  * value of the HW index has become stale.
 607                  */
 608                 ath10k_pci_wake(ar);
 609                 src_ring->hw_index =
 610                         ath10k_ce_src_ring_read_index_get(ar, ctrl_addr);
 611                 src_ring->hw_index &= nentries_mask;
 612                 ath10k_pci_sleep(ar);
 613         }
 614
 615         read_index = src_ring->hw_index;
 616
 617         if ((read_index == sw_index) || (read_index == 0xffffffff))
 618                 return -EIO;
 619
 620         sbase = src_ring->shadow_base;
 621         sdesc = CE_SRC_RING_TO_DESC(sbase, sw_index);
 622
 623         /* Return data from completed source descriptor */
 624         *bufferp = __le32_to_cpu(sdesc->addr);
 625         *nbytesp = __le16_to_cpu(sdesc->nbytes);
 626         *transfer_idp = MS(__le16_to_cpu(sdesc->flags),
 627                            CE_DESC_FLAGS_META_DATA);
 628
 629         if (per_transfer_contextp)
 630                 *per_transfer_contextp =
 631                         src_ring->per_transfer_context[sw_index];
 632
 633         /* sanity */
 634         src_ring->per_transfer_context[sw_index] = NULL;
 635
 636         /* Update sw_index */
 637         sw_index = CE_RING_IDX_INCR(nentries_mask, sw_index);
 638         src_ring->sw_index = sw_index;
 639
 640         return 0;
 641 }
 642
 643 /* NB: Modeled after ath10k_ce_completed_send_next */
 644 int ath10k_ce_cancel_send_next(struct ath10k_ce_pipe *ce_state,
 645                                void **per_transfer_contextp,
 646                                u32 *bufferp,
 647                                unsigned int *nbytesp,
 648                                unsigned int *transfer_idp)
 649 {
 650         struct ath10k_ce_ring *src_ring;
 651         unsigned int nentries_mask;
 652         unsigned int sw_index;
 653         unsigned int write_index;
 654         int ret;
 655         struct ath10k *ar;
 656         struct ath10k_pci *ar_pci;
 657
 658         src_ring = ce_state->src_ring;
 659
 660         if (!src_ring)
 661                 return -EIO;
 662
 663         ar = ce_state->ar;
 664         ar_pci = ath10k_pci_priv(ar);
 665
 666         spin_lock_bh(&ar_pci->ce_lock);
 667
 668         nentries_mask = src_ring->nentries_mask;
 669         sw_index = src_ring->sw_index;
 670         write_index = src_ring->write_index;
 671
 672         if (write_index != sw_index) {
 673                 struct ce_desc *base = src_ring->base_addr_owner_space;
 674                 struct ce_desc *desc = CE_SRC_RING_TO_DESC(base, sw_index);
 675
 676                 /* Return data from completed source descriptor */
 677                 *bufferp = __le32_to_cpu(desc->addr);
 678                 *nbytesp = __le16_to_cpu(desc->nbytes);
 679                 *transfer_idp = MS(__le16_to_cpu(desc->flags),
 680                                                 CE_DESC_FLAGS_META_DATA);
 681
 682                 if (per_transfer_contextp)
 683                         *per_transfer_contextp =
 684                                 src_ring->per_transfer_context[sw_index];
 685
 686                 /* sanity */
 687                 src_ring->per_transfer_context[sw_index] = NULL;
 688
 689                 /* Update sw_index */
 690                 sw_index = CE_RING_IDX_INCR(nentries_mask, sw_index);
 691                 src_ring->sw_index = sw_index;
 692                 ret = 0;
 693         } else {
 694                 ret = -EIO;
 695         }
 696
 697         spin_unlock_bh(&ar_pci->ce_lock);
 698
 699         return ret;
 700 }
 701
 702 int ath10k_ce_completed_send_next(struct ath10k_ce_pipe *ce_state,
 703                                   void **per_transfer_contextp,
 704                                   u32 *bufferp,
 705                                   unsigned int *nbytesp,
 706                                   unsigned int *transfer_idp)
 707 {
 708         struct ath10k *ar = ce_state->ar;
 709         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 710         int ret;
 711
 712         spin_lock_bh(&ar_pci->ce_lock);
 713         ret = ath10k_ce_completed_send_next_nolock(ce_state,
 714                                                    per_transfer_contextp,
 715                                                    bufferp, nbytesp,
 716                                                    transfer_idp);
 717         spin_unlock_bh(&ar_pci->ce_lock);
 718
 719         return ret;
 720 }
 721
 722 /*
 723  * Guts of interrupt handler for per-engine interrupts on a particular CE.
 724  *
 725  * Invokes registered callbacks for recv_complete,
 726  * send_complete, and watermarks.
 727  */
 728 void ath10k_ce_per_engine_service(struct ath10k *ar, unsigned int ce_id)
 729 {
 730         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 731         struct ath10k_ce_pipe *ce_state = &ar_pci->ce_states[ce_id];
 732         u32 ctrl_addr = ce_state->ctrl_addr;
 733         void *transfer_context;
 734         u32 buf;
 735         unsigned int nbytes;
 736         unsigned int id;
 737         unsigned int flags;
 738
 739         ath10k_pci_wake(ar);
 740         spin_lock_bh(&ar_pci->ce_lock);
 741
 742         /* Clear the copy-complete interrupts that will be handled here. */
 743         ath10k_ce_engine_int_status_clear(ar, ctrl_addr,
 744                                           HOST_IS_COPY_COMPLETE_MASK);
 745
 746         if (ce_state->recv_cb) {
 747                 /*
 748                  * Pop completed recv buffers and call the registered
 749                  * recv callback for each
 750                  */
 751                 while (ath10k_ce_completed_recv_next_nolock(ce_state,
 752                                                             &transfer_context,
 753                                                             &buf, &nbytes,
 754                                                             &id, &flags) == 0) {
 755                         spin_unlock_bh(&ar_pci->ce_lock);
 756                         ce_state->recv_cb(ce_state, transfer_context, buf,
 757                                           nbytes, id, flags);
 758                         spin_lock_bh(&ar_pci->ce_lock);
 759                 }
 760         }
 761
 762         if (ce_state->send_cb) {
 763                 /*
 764                  * Pop completed send buffers and call the registered
 765                  * send callback for each
 766                  */
 767                 while (ath10k_ce_completed_send_next_nolock(ce_state,
 768                                                             &transfer_context,
 769                                                             &buf,
 770                                                             &nbytes,
 771                                                             &id) == 0) {
 772                         spin_unlock_bh(&ar_pci->ce_lock);
 773                         ce_state->send_cb(ce_state, transfer_context,
 774                                           buf, nbytes, id);
 775                         spin_lock_bh(&ar_pci->ce_lock);
 776                 }
 777         }
 778
 779         /*
 780          * Misc CE interrupts are not being handled, but still need
 781          * to be cleared.
 782          */
 783         ath10k_ce_engine_int_status_clear(ar, ctrl_addr, CE_WATERMARK_MASK);
 784
 785         spin_unlock_bh(&ar_pci->ce_lock);
 786         ath10k_pci_sleep(ar);
 787 }
 788
 789 /*
 790  * Handler for per-engine interrupts on ALL active CEs.
 791  * This is used in cases where the system is sharing a
 792  * single interrput for all CEs
 793  */
 794
 795 void ath10k_ce_per_engine_service_any(struct ath10k *ar)
 796 {
 797         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 798         int ce_id;
 799         u32 intr_summary;
 800
 801         ath10k_pci_wake(ar);
 802         intr_summary = CE_INTERRUPT_SUMMARY(ar);
 803
 804         for (ce_id = 0; intr_summary && (ce_id < ar_pci->ce_count); ce_id++) {
 805                 if (intr_summary & (1 << ce_id))
 806                         intr_summary &= ~(1 << ce_id);
 807                 else
 808                         /* no intr pending on this CE */
 809                         continue;
 810
 811                 ath10k_ce_per_engine_service(ar, ce_id);
 812         }
 813
 814         ath10k_pci_sleep(ar);
 815 }
 816
 817 /*
 818  * Adjust interrupts for the copy complete handler.
 819  * If it's needed for either send or recv, then unmask
 820  * this interrupt; otherwise, mask it.
 821  *
 822  * Called with ce_lock held.
 823  */
 824 static void ath10k_ce_per_engine_handler_adjust(struct ath10k_ce_pipe *ce_state,
 825                                                 int disable_copy_compl_intr)
 826 {
 827         u32 ctrl_addr = ce_state->ctrl_addr;
 828         struct ath10k *ar = ce_state->ar;
 829
 830         ath10k_pci_wake(ar);
 831
 832         if ((!disable_copy_compl_intr) &&
 833             (ce_state->send_cb || ce_state->recv_cb))
 834                 ath10k_ce_copy_complete_inter_enable(ar, ctrl_addr);
 835         else
 836                 ath10k_ce_copy_complete_intr_disable(ar, ctrl_addr);
 837
 838         ath10k_ce_watermark_intr_disable(ar, ctrl_addr);
 839
 840         ath10k_pci_sleep(ar);
 841 }
 842
 843 void ath10k_ce_disable_interrupts(struct ath10k *ar)
 844 {
 845         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 846         int ce_id;
 847
 848         ath10k_pci_wake(ar);
 849         for (ce_id = 0; ce_id < ar_pci->ce_count; ce_id++) {
 850                 struct ath10k_ce_pipe *ce_state = &ar_pci->ce_states[ce_id];
 851                 u32 ctrl_addr = ce_state->ctrl_addr;
 852
 853                 ath10k_ce_copy_complete_intr_disable(ar, ctrl_addr);
 854         }
 855         ath10k_pci_sleep(ar);
 856 }
 857
 858 void ath10k_ce_send_cb_register(struct ath10k_ce_pipe *ce_state,
 859                                 void (*send_cb)(struct ath10k_ce_pipe *ce_state,
 860                                                 void *transfer_context,
 861                                                 u32 buffer,
 862                                                 unsigned int nbytes,
 863                                                 unsigned int transfer_id),
 864                                 int disable_interrupts)
 865 {
 866         struct ath10k *ar = ce_state->ar;
 867         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 868
 869         spin_lock_bh(&ar_pci->ce_lock);
 870         ce_state->send_cb = send_cb;
 871         ath10k_ce_per_engine_handler_adjust(ce_state, disable_interrupts);
 872         spin_unlock_bh(&ar_pci->ce_lock);
 873 }
 874
 875 void ath10k_ce_recv_cb_register(struct ath10k_ce_pipe *ce_state,
 876                                 void (*recv_cb)(struct ath10k_ce_pipe *ce_state,
 877                                                 void *transfer_context,
 878                                                 u32 buffer,
 879                                                 unsigned int nbytes,
 880                                                 unsigned int transfer_id,
 881                                                 unsigned int flags))
 882 {
 883         struct ath10k *ar = ce_state->ar;
 884         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 885
 886         spin_lock_bh(&ar_pci->ce_lock);
 887         ce_state->recv_cb = recv_cb;
 888         ath10k_ce_per_engine_handler_adjust(ce_state, 0);
 889         spin_unlock_bh(&ar_pci->ce_lock);
 890 }
 891
 892 static int ath10k_ce_init_src_ring(struct ath10k *ar,
 893                                    unsigned int ce_id,
 894                                    struct ath10k_ce_pipe *ce_state,
 895                                    const struct ce_attr *attr)
 896 {
 897         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 898         struct ath10k_ce_ring *src_ring;
 899         unsigned int nentries = attr->src_nentries;
 900         unsigned int ce_nbytes;
 901         u32 ctrl_addr = ath10k_ce_base_address(ce_id);
 902         dma_addr_t base_addr;
 903         char *ptr;
 904
 905         nentries = roundup_pow_of_two(nentries);
 906
 907         if (ce_state->src_ring) {
 908                 WARN_ON(ce_state->src_ring->nentries != nentries);
 909                 return 0;
 910         }
 911
 912         ce_nbytes = sizeof(struct ath10k_ce_ring) + (nentries * sizeof(void *));
 913         ptr = kzalloc(ce_nbytes, GFP_KERNEL);
 914         if (ptr == NULL)
 915                 return -ENOMEM;
 916
 917         ce_state->src_ring = (struct ath10k_ce_ring *)ptr;
 918         src_ring = ce_state->src_ring;
 919
 920         ptr += sizeof(struct ath10k_ce_ring);
 921         src_ring->nentries = nentries;
 922         src_ring->nentries_mask = nentries - 1;
 923
 924         ath10k_pci_wake(ar);
 925         src_ring->sw_index = ath10k_ce_src_ring_read_index_get(ar, ctrl_addr);
 926         src_ring->sw_index &= src_ring->nentries_mask;
 927         src_ring->hw_index = src_ring->sw_index;
 928
 929         src_ring->write_index =
 930                 ath10k_ce_src_ring_write_index_get(ar, ctrl_addr);
 931         src_ring->write_index &= src_ring->nentries_mask;
 932         ath10k_pci_sleep(ar);
 933
 934         src_ring->per_transfer_context = (void **)ptr;
 935
 936         /*
 937          * Legacy platforms that do not support cache
 938          * coherent DMA are unsupported
 939          */
 940         src_ring->base_addr_owner_space_unaligned =
 941                 pci_alloc_consistent(ar_pci->pdev,
 942                                      (nentries * sizeof(struct ce_desc) +
 943                                       CE_DESC_RING_ALIGN),
 944                                      &base_addr);
 945         if (!src_ring->base_addr_owner_space_unaligned) {
 946                 kfree(ce_state->src_ring);
 947                 ce_state->src_ring = NULL;
 948                 return -ENOMEM;
 949         }
 950
 951         src_ring->base_addr_ce_space_unaligned = base_addr;
 952
 953         src_ring->base_addr_owner_space = PTR_ALIGN(
 954                         src_ring->base_addr_owner_space_unaligned,
 955                         CE_DESC_RING_ALIGN);
 956         src_ring->base_addr_ce_space = ALIGN(
 957                         src_ring->base_addr_ce_space_unaligned,
 958                         CE_DESC_RING_ALIGN);
 959
 960         /*
 961          * Also allocate a shadow src ring in regular
 962          * mem to use for faster access.
 963          */
 964         src_ring->shadow_base_unaligned =
 965                 kmalloc((nentries * sizeof(struct ce_desc) +
 966                          CE_DESC_RING_ALIGN), GFP_KERNEL);
 967         if (!src_ring->shadow_base_unaligned) {
 968                 pci_free_consistent(ar_pci->pdev,
 969                                     (nentries * sizeof(struct ce_desc) +
 970                                      CE_DESC_RING_ALIGN),
 971                                     src_ring->base_addr_owner_space,
 972                                     src_ring->base_addr_ce_space);
 973                 kfree(ce_state->src_ring);
 974                 ce_state->src_ring = NULL;
 975                 return -ENOMEM;
 976         }
 977
 978         src_ring->shadow_base = PTR_ALIGN(
 979                         src_ring->shadow_base_unaligned,
 980                         CE_DESC_RING_ALIGN);
 981
 982         ath10k_pci_wake(ar);
 983         ath10k_ce_src_ring_base_addr_set(ar, ctrl_addr,
 984                                          src_ring->base_addr_ce_space);
 985         ath10k_ce_src_ring_size_set(ar, ctrl_addr, nentries);
 986         ath10k_ce_src_ring_dmax_set(ar, ctrl_addr, attr->src_sz_max);
 987         ath10k_ce_src_ring_byte_swap_set(ar, ctrl_addr, 0);
 988         ath10k_ce_src_ring_lowmark_set(ar, ctrl_addr, 0);
 989         ath10k_ce_src_ring_highmark_set(ar, ctrl_addr, nentries);
 990         ath10k_pci_sleep(ar);
 991
 992         return 0;
 993 }
 994
 995 static int ath10k_ce_init_dest_ring(struct ath10k *ar,
 996                                     unsigned int ce_id,
 997                                     struct ath10k_ce_pipe *ce_state,
 998                                     const struct ce_attr *attr)
 999 {
1000         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
1001         struct ath10k_ce_ring *dest_ring;
1002         unsigned int nentries = attr->dest_nentries;
1003         unsigned int ce_nbytes;
1004         u32 ctrl_addr = ath10k_ce_base_address(ce_id);
1005         dma_addr_t base_addr;
1006         char *ptr;
1007
1008         nentries = roundup_pow_of_two(nentries);
1009
1010         if (ce_state->dest_ring) {
1011                 WARN_ON(ce_state->dest_ring->nentries != nentries);
1012                 return 0;
1013         }
1014
1015         ce_nbytes = sizeof(struct ath10k_ce_ring) + (nentries * sizeof(void *));
1016         ptr = kzalloc(ce_nbytes, GFP_KERNEL);
1017         if (ptr == NULL)
1018                 return -ENOMEM;
1019
1020         ce_state->dest_ring = (struct ath10k_ce_ring *)ptr;
1021         dest_ring = ce_state->dest_ring;
1022
1023         ptr += sizeof(struct ath10k_ce_ring);
1024         dest_ring->nentries = nentries;
1025         dest_ring->nentries_mask = nentries - 1;
1026
1027         ath10k_pci_wake(ar);
1028         dest_ring->sw_index = ath10k_ce_dest_ring_read_index_get(ar, ctrl_addr);
1029         dest_ring->sw_index &= dest_ring->nentries_mask;
1030         dest_ring->write_index =
1031                 ath10k_ce_dest_ring_write_index_get(ar, ctrl_addr);
1032         dest_ring->write_index &= dest_ring->nentries_mask;
1033         ath10k_pci_sleep(ar);
1034
1035         dest_ring->per_transfer_context = (void **)ptr;
1036
1037         /*
1038          * Legacy platforms that do not support cache
1039          * coherent DMA are unsupported
1040          */
1041         dest_ring->base_addr_owner_space_unaligned =
1042                 pci_alloc_consistent(ar_pci->pdev,
1043                                      (nentries * sizeof(struct ce_desc) +
1044                                       CE_DESC_RING_ALIGN),
1045                                      &base_addr);
1046         if (!dest_ring->base_addr_owner_space_unaligned) {
1047                 kfree(ce_state->dest_ring);
1048                 ce_state->dest_ring = NULL;
1049                 return -ENOMEM;
1050         }
1051
1052         dest_ring->base_addr_ce_space_unaligned = base_addr;
1053
1054         /*
1055          * Correctly initialize memory to 0 to prevent garbage
1056          * data crashing system when download firmware
1057          */
1058         memset(dest_ring->base_addr_owner_space_unaligned, 0,
1059                nentries * sizeof(struct ce_desc) + CE_DESC_RING_ALIGN);
1060
1061         dest_ring->base_addr_owner_space = PTR_ALIGN(
1062                         dest_ring->base_addr_owner_space_unaligned,
1063                         CE_DESC_RING_ALIGN);
1064         dest_ring->base_addr_ce_space = ALIGN(
1065                         dest_ring->base_addr_ce_space_unaligned,
1066                         CE_DESC_RING_ALIGN);
1067
1068         ath10k_pci_wake(ar);
1069         ath10k_ce_dest_ring_base_addr_set(ar, ctrl_addr,
1070                                           dest_ring->base_addr_ce_space);
1071         ath10k_ce_dest_ring_size_set(ar, ctrl_addr, nentries);
1072         ath10k_ce_dest_ring_byte_swap_set(ar, ctrl_addr, 0);
1073         ath10k_ce_dest_ring_lowmark_set(ar, ctrl_addr, 0);
1074         ath10k_ce_dest_ring_highmark_set(ar, ctrl_addr, nentries);
1075         ath10k_pci_sleep(ar);
1076
1077         return 0;
1078 }
1079
1080 static struct ath10k_ce_pipe *ath10k_ce_init_state(struct ath10k *ar,
1081                                              unsigned int ce_id,
1082                                              const struct ce_attr *attr)
1083 {
1084         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
1085         struct ath10k_ce_pipe *ce_state = &ar_pci->ce_states[ce_id];
1086         u32 ctrl_addr = ath10k_ce_base_address(ce_id);
1087
1088         spin_lock_bh(&ar_pci->ce_lock);
1089
1090         ce_state->ar = ar;
1091         ce_state->id = ce_id;
1092         ce_state->ctrl_addr = ctrl_addr;
1093         ce_state->attr_flags = attr->flags;
1094         ce_state->src_sz_max = attr->src_sz_max;
1095
1096         spin_unlock_bh(&ar_pci->ce_lock);
1097
1098         return ce_state;
1099 }
1100
1101 /*
1102  * Initialize a Copy Engine based on caller-supplied attributes.
1103  * This may be called once to initialize both source and destination
1104  * rings or it may be called twice for separate source and destination
1105  * initialization. It may be that only one side or the other is
1106  * initialized by software/firmware.
1107  */
1108 struct ath10k_ce_pipe *ath10k_ce_init(struct ath10k *ar,
1109                                 unsigned int ce_id,
1110                                 const struct ce_attr *attr)
1111 {
1112         struct ath10k_ce_pipe *ce_state;
1113         u32 ctrl_addr = ath10k_ce_base_address(ce_id);
1114         int ret;
1115
1116         ce_state = ath10k_ce_init_state(ar, ce_id, attr);
1117         if (!ce_state) {
1118                 ath10k_err("Failed to initialize CE state for ID: %d\n", ce_id);
1119                 return NULL;
1120         }
1121
1122         if (attr->src_nentries) {
1123                 ret = ath10k_ce_init_src_ring(ar, ce_id, ce_state, attr);
1124                 if (ret) {
1125                         ath10k_err("Failed to initialize CE src ring for ID: %d (%d)\n",
1126                                    ce_id, ret);
1127                         ath10k_ce_deinit(ce_state);
1128                         return NULL;
1129                 }
1130         }
1131
1132         if (attr->dest_nentries) {
1133                 ret = ath10k_ce_init_dest_ring(ar, ce_id, ce_state, attr);
1134                 if (ret) {
1135                         ath10k_err("Failed to initialize CE dest ring for ID: %d (%d)\n",
1136                                    ce_id, ret);
1137                         ath10k_ce_deinit(ce_state);
1138                         return NULL;
1139                 }
1140         }
1141
1142         /* Enable CE error interrupts */
1143         ath10k_pci_wake(ar);
1144         ath10k_ce_error_intr_enable(ar, ctrl_addr);
1145         ath10k_pci_sleep(ar);
1146
1147         return ce_state;
1148 }
1149
1150 void ath10k_ce_deinit(struct ath10k_ce_pipe *ce_state)
1151 {
1152         struct ath10k *ar = ce_state->ar;
1153         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
1154
1155         if (ce_state->src_ring) {
1156                 kfree(ce_state->src_ring->shadow_base_unaligned);
1157                 pci_free_consistent(ar_pci->pdev,
1158                                     (ce_state->src_ring->nentries *
1159                                      sizeof(struct ce_desc) +
1160                                      CE_DESC_RING_ALIGN),
1161                                     ce_state->src_ring->base_addr_owner_space,
1162                                     ce_state->src_ring->base_addr_ce_space);
1163                 kfree(ce_state->src_ring);
1164         }
1165
1166         if (ce_state->dest_ring) {
1167                 pci_free_consistent(ar_pci->pdev,
1168                                     (ce_state->dest_ring->nentries *
1169                                      sizeof(struct ce_desc) +
1170                                      CE_DESC_RING_ALIGN),
1171                                     ce_state->dest_ring->base_addr_owner_space,
1172                                     ce_state->dest_ring->base_addr_ce_space);
1173                 kfree(ce_state->dest_ring);
1174         }
1175
1176         ce_state->src_ring = NULL;
1177         ce_state->dest_ring = NULL;
1178 }