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_error_intr_disable(struct ath10k *ar,
 247                                                 u32 ce_ctrl_addr)
 248 {
 249         u32 misc_ie_addr = ath10k_pci_read32(ar,
 250                                              ce_ctrl_addr + MISC_IE_ADDRESS);
 251
 252         ath10k_pci_write32(ar, ce_ctrl_addr + MISC_IE_ADDRESS,
 253                            misc_ie_addr & ~CE_ERROR_MASK);
 254 }
 255
 256 static inline void ath10k_ce_engine_int_status_clear(struct ath10k *ar,
 257                                                      u32 ce_ctrl_addr,
 258                                                      unsigned int mask)
 259 {
 260         ath10k_pci_write32(ar, ce_ctrl_addr + HOST_IS_ADDRESS, mask);
 261 }
 262
 263
 264 /*
 265  * Guts of ath10k_ce_send, used by both ath10k_ce_send and
 266  * ath10k_ce_sendlist_send.
 267  * The caller takes responsibility for any needed locking.
 268  */
 269 int ath10k_ce_send_nolock(struct ath10k_ce_pipe *ce_state,
 270                           void *per_transfer_context,
 271                           u32 buffer,
 272                           unsigned int nbytes,
 273                           unsigned int transfer_id,
 274                           unsigned int flags)
 275 {
 276         struct ath10k *ar = ce_state->ar;
 277         struct ath10k_ce_ring *src_ring = ce_state->src_ring;
 278         struct ce_desc *desc, *sdesc;
 279         unsigned int nentries_mask = src_ring->nentries_mask;
 280         unsigned int sw_index = src_ring->sw_index;
 281         unsigned int write_index = src_ring->write_index;
 282         u32 ctrl_addr = ce_state->ctrl_addr;
 283         u32 desc_flags = 0;
 284         int ret = 0;
 285
 286         if (nbytes > ce_state->src_sz_max)
 287                 ath10k_warn("%s: send more we can (nbytes: %d, max: %d)\n",
 288                             __func__, nbytes, ce_state->src_sz_max);
 289
 290         ret = ath10k_pci_wake(ar);
 291         if (ret)
 292                 return ret;
 293
 294         if (unlikely(CE_RING_DELTA(nentries_mask,
 295                                    write_index, sw_index - 1) <= 0)) {
 296                 ret = -ENOSR;
 297                 goto exit;
 298         }
 299
 300         desc = CE_SRC_RING_TO_DESC(src_ring->base_addr_owner_space,
 301                                    write_index);
 302         sdesc = CE_SRC_RING_TO_DESC(src_ring->shadow_base, write_index);
 303
 304         desc_flags |= SM(transfer_id, CE_DESC_FLAGS_META_DATA);
 305
 306         if (flags & CE_SEND_FLAG_GATHER)
 307                 desc_flags |= CE_DESC_FLAGS_GATHER;
 308         if (flags & CE_SEND_FLAG_BYTE_SWAP)
 309                 desc_flags |= CE_DESC_FLAGS_BYTE_SWAP;
 310
 311         sdesc->addr   = __cpu_to_le32(buffer);
 312         sdesc->nbytes = __cpu_to_le16(nbytes);
 313         sdesc->flags  = __cpu_to_le16(desc_flags);
 314
 315         *desc = *sdesc;
 316
 317         src_ring->per_transfer_context[write_index] = per_transfer_context;
 318
 319         /* Update Source Ring Write Index */
 320         write_index = CE_RING_IDX_INCR(nentries_mask, write_index);
 321
 322         /* WORKAROUND */
 323         if (!(flags & CE_SEND_FLAG_GATHER))
 324                 ath10k_ce_src_ring_write_index_set(ar, ctrl_addr, write_index);
 325
 326         src_ring->write_index = write_index;
 327 exit:
 328         ath10k_pci_sleep(ar);
 329         return ret;
 330 }
 331
 332 void __ath10k_ce_send_revert(struct ath10k_ce_pipe *pipe)
 333 {
 334         struct ath10k *ar = pipe->ar;
 335         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 336         struct ath10k_ce_ring *src_ring = pipe->src_ring;
 337         u32 ctrl_addr = pipe->ctrl_addr;
 338
 339         lockdep_assert_held(&ar_pci->ce_lock);
 340
 341         /*
 342          * This function must be called only if there is an incomplete
 343          * scatter-gather transfer (before index register is updated)
 344          * that needs to be cleaned up.
 345          */
 346         if (WARN_ON_ONCE(src_ring->write_index == src_ring->sw_index))
 347                 return;
 348
 349         if (WARN_ON_ONCE(src_ring->write_index ==
 350                          ath10k_ce_src_ring_write_index_get(ar, ctrl_addr)))
 351                 return;
 352
 353         src_ring->write_index--;
 354         src_ring->write_index &= src_ring->nentries_mask;
 355
 356         src_ring->per_transfer_context[src_ring->write_index] = NULL;
 357 }
 358
 359 int ath10k_ce_send(struct ath10k_ce_pipe *ce_state,
 360                    void *per_transfer_context,
 361                    u32 buffer,
 362                    unsigned int nbytes,
 363                    unsigned int transfer_id,
 364                    unsigned int flags)
 365 {
 366         struct ath10k *ar = ce_state->ar;
 367         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 368         int ret;
 369
 370         spin_lock_bh(&ar_pci->ce_lock);
 371         ret = ath10k_ce_send_nolock(ce_state, per_transfer_context,
 372                                     buffer, nbytes, transfer_id, flags);
 373         spin_unlock_bh(&ar_pci->ce_lock);
 374
 375         return ret;
 376 }
 377
 378 int ath10k_ce_num_free_src_entries(struct ath10k_ce_pipe *pipe)
 379 {
 380         struct ath10k *ar = pipe->ar;
 381         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 382         int delta;
 383
 384         spin_lock_bh(&ar_pci->ce_lock);
 385         delta = CE_RING_DELTA(pipe->src_ring->nentries_mask,
 386                               pipe->src_ring->write_index,
 387                               pipe->src_ring->sw_index - 1);
 388         spin_unlock_bh(&ar_pci->ce_lock);
 389
 390         return delta;
 391 }
 392
 393 int ath10k_ce_recv_buf_enqueue(struct ath10k_ce_pipe *ce_state,
 394                                void *per_recv_context,
 395                                u32 buffer)
 396 {
 397         struct ath10k_ce_ring *dest_ring = ce_state->dest_ring;
 398         u32 ctrl_addr = ce_state->ctrl_addr;
 399         struct ath10k *ar = ce_state->ar;
 400         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 401         unsigned int nentries_mask = dest_ring->nentries_mask;
 402         unsigned int write_index;
 403         unsigned int sw_index;
 404         int ret;
 405
 406         spin_lock_bh(&ar_pci->ce_lock);
 407         write_index = dest_ring->write_index;
 408         sw_index = dest_ring->sw_index;
 409
 410         ret = ath10k_pci_wake(ar);
 411         if (ret)
 412                 goto out;
 413
 414         if (CE_RING_DELTA(nentries_mask, write_index, sw_index - 1) > 0) {
 415                 struct ce_desc *base = dest_ring->base_addr_owner_space;
 416                 struct ce_desc *desc = CE_DEST_RING_TO_DESC(base, write_index);
 417
 418                 /* Update destination descriptor */
 419                 desc->addr    = __cpu_to_le32(buffer);
 420                 desc->nbytes = 0;
 421
 422                 dest_ring->per_transfer_context[write_index] =
 423                                                         per_recv_context;
 424
 425                 /* Update Destination Ring Write Index */
 426                 write_index = CE_RING_IDX_INCR(nentries_mask, write_index);
 427                 ath10k_ce_dest_ring_write_index_set(ar, ctrl_addr, write_index);
 428                 dest_ring->write_index = write_index;
 429                 ret = 0;
 430         } else {
 431                 ret = -EIO;
 432         }
 433         ath10k_pci_sleep(ar);
 434
 435 out:
 436         spin_unlock_bh(&ar_pci->ce_lock);
 437
 438         return ret;
 439 }
 440
 441 /*
 442  * Guts of ath10k_ce_completed_recv_next.
 443  * The caller takes responsibility for any necessary locking.
 444  */
 445 static int ath10k_ce_completed_recv_next_nolock(struct ath10k_ce_pipe *ce_state,
 446                                                 void **per_transfer_contextp,
 447                                                 u32 *bufferp,
 448                                                 unsigned int *nbytesp,
 449                                                 unsigned int *transfer_idp,
 450                                                 unsigned int *flagsp)
 451 {
 452         struct ath10k_ce_ring *dest_ring = ce_state->dest_ring;
 453         unsigned int nentries_mask = dest_ring->nentries_mask;
 454         unsigned int sw_index = dest_ring->sw_index;
 455
 456         struct ce_desc *base = dest_ring->base_addr_owner_space;
 457         struct ce_desc *desc = CE_DEST_RING_TO_DESC(base, sw_index);
 458         struct ce_desc sdesc;
 459         u16 nbytes;
 460
 461         /* Copy in one go for performance reasons */
 462         sdesc = *desc;
 463
 464         nbytes = __le16_to_cpu(sdesc.nbytes);
 465         if (nbytes == 0) {
 466                 /*
 467                  * This closes a relatively unusual race where the Host
 468                  * sees the updated DRRI before the update to the
 469                  * corresponding descriptor has completed. We treat this
 470                  * as a descriptor that is not yet done.
 471                  */
 472                 return -EIO;
 473         }
 474
 475         desc->nbytes = 0;
 476
 477         /* Return data from completed destination descriptor */
 478         *bufferp = __le32_to_cpu(sdesc.addr);
 479         *nbytesp = nbytes;
 480         *transfer_idp = MS(__le16_to_cpu(sdesc.flags), CE_DESC_FLAGS_META_DATA);
 481
 482         if (__le16_to_cpu(sdesc.flags) & CE_DESC_FLAGS_BYTE_SWAP)
 483                 *flagsp = CE_RECV_FLAG_SWAPPED;
 484         else
 485                 *flagsp = 0;
 486
 487         if (per_transfer_contextp)
 488                 *per_transfer_contextp =
 489                         dest_ring->per_transfer_context[sw_index];
 490
 491         /* sanity */
 492         dest_ring->per_transfer_context[sw_index] = NULL;
 493
 494         /* Update sw_index */
 495         sw_index = CE_RING_IDX_INCR(nentries_mask, sw_index);
 496         dest_ring->sw_index = sw_index;
 497
 498         return 0;
 499 }
 500
 501 int ath10k_ce_completed_recv_next(struct ath10k_ce_pipe *ce_state,
 502                                   void **per_transfer_contextp,
 503                                   u32 *bufferp,
 504                                   unsigned int *nbytesp,
 505                                   unsigned int *transfer_idp,
 506                                   unsigned int *flagsp)
 507 {
 508         struct ath10k *ar = ce_state->ar;
 509         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 510         int ret;
 511
 512         spin_lock_bh(&ar_pci->ce_lock);
 513         ret = ath10k_ce_completed_recv_next_nolock(ce_state,
 514                                                    per_transfer_contextp,
 515                                                    bufferp, nbytesp,
 516                                                    transfer_idp, flagsp);
 517         spin_unlock_bh(&ar_pci->ce_lock);
 518
 519         return ret;
 520 }
 521
 522 int ath10k_ce_revoke_recv_next(struct ath10k_ce_pipe *ce_state,
 523                                void **per_transfer_contextp,
 524                                u32 *bufferp)
 525 {
 526         struct ath10k_ce_ring *dest_ring;
 527         unsigned int nentries_mask;
 528         unsigned int sw_index;
 529         unsigned int write_index;
 530         int ret;
 531         struct ath10k *ar;
 532         struct ath10k_pci *ar_pci;
 533
 534         dest_ring = ce_state->dest_ring;
 535
 536         if (!dest_ring)
 537                 return -EIO;
 538
 539         ar = ce_state->ar;
 540         ar_pci = ath10k_pci_priv(ar);
 541
 542         spin_lock_bh(&ar_pci->ce_lock);
 543
 544         nentries_mask = dest_ring->nentries_mask;
 545         sw_index = dest_ring->sw_index;
 546         write_index = dest_ring->write_index;
 547         if (write_index != sw_index) {
 548                 struct ce_desc *base = dest_ring->base_addr_owner_space;
 549                 struct ce_desc *desc = CE_DEST_RING_TO_DESC(base, sw_index);
 550
 551                 /* Return data from completed destination descriptor */
 552                 *bufferp = __le32_to_cpu(desc->addr);
 553
 554                 if (per_transfer_contextp)
 555                         *per_transfer_contextp =
 556                                 dest_ring->per_transfer_context[sw_index];
 557
 558                 /* sanity */
 559                 dest_ring->per_transfer_context[sw_index] = NULL;
 560
 561                 /* Update sw_index */
 562                 sw_index = CE_RING_IDX_INCR(nentries_mask, sw_index);
 563                 dest_ring->sw_index = sw_index;
 564                 ret = 0;
 565         } else {
 566                 ret = -EIO;
 567         }
 568
 569         spin_unlock_bh(&ar_pci->ce_lock);
 570
 571         return ret;
 572 }
 573
 574 /*
 575  * Guts of ath10k_ce_completed_send_next.
 576  * The caller takes responsibility for any necessary locking.
 577  */
 578 static int ath10k_ce_completed_send_next_nolock(struct ath10k_ce_pipe *ce_state,
 579                                                 void **per_transfer_contextp,
 580                                                 u32 *bufferp,
 581                                                 unsigned int *nbytesp,
 582                                                 unsigned int *transfer_idp)
 583 {
 584         struct ath10k_ce_ring *src_ring = ce_state->src_ring;
 585         u32 ctrl_addr = ce_state->ctrl_addr;
 586         struct ath10k *ar = ce_state->ar;
 587         unsigned int nentries_mask = src_ring->nentries_mask;
 588         unsigned int sw_index = src_ring->sw_index;
 589         struct ce_desc *sdesc, *sbase;
 590         unsigned int read_index;
 591         int ret;
 592
 593         if (src_ring->hw_index == sw_index) {
 594                 /*
 595                  * The SW completion index has caught up with the cached
 596                  * version of the HW completion index.
 597                  * Update the cached HW completion index to see whether
 598                  * the SW has really caught up to the HW, or if the cached
 599                  * value of the HW index has become stale.
 600                  */
 601
 602                 ret = ath10k_pci_wake(ar);
 603                 if (ret)
 604                         return ret;
 605
 606                 src_ring->hw_index =
 607                         ath10k_ce_src_ring_read_index_get(ar, ctrl_addr);
 608                 src_ring->hw_index &= nentries_mask;
 609
 610                 ath10k_pci_sleep(ar);
 611         }
 612
 613         read_index = src_ring->hw_index;
 614
 615         if ((read_index == sw_index) || (read_index == 0xffffffff))
 616                 return -EIO;
 617
 618         sbase = src_ring->shadow_base;
 619         sdesc = CE_SRC_RING_TO_DESC(sbase, sw_index);
 620
 621         /* Return data from completed source descriptor */
 622         *bufferp = __le32_to_cpu(sdesc->addr);
 623         *nbytesp = __le16_to_cpu(sdesc->nbytes);
 624         *transfer_idp = MS(__le16_to_cpu(sdesc->flags),
 625                            CE_DESC_FLAGS_META_DATA);
 626
 627         if (per_transfer_contextp)
 628                 *per_transfer_contextp =
 629                         src_ring->per_transfer_context[sw_index];
 630
 631         /* sanity */
 632         src_ring->per_transfer_context[sw_index] = NULL;
 633
 634         /* Update sw_index */
 635         sw_index = CE_RING_IDX_INCR(nentries_mask, sw_index);
 636         src_ring->sw_index = sw_index;
 637
 638         return 0;
 639 }
 640
 641 /* NB: Modeled after ath10k_ce_completed_send_next */
 642 int ath10k_ce_cancel_send_next(struct ath10k_ce_pipe *ce_state,
 643                                void **per_transfer_contextp,
 644                                u32 *bufferp,
 645                                unsigned int *nbytesp,
 646                                unsigned int *transfer_idp)
 647 {
 648         struct ath10k_ce_ring *src_ring;
 649         unsigned int nentries_mask;
 650         unsigned int sw_index;
 651         unsigned int write_index;
 652         int ret;
 653         struct ath10k *ar;
 654         struct ath10k_pci *ar_pci;
 655
 656         src_ring = ce_state->src_ring;
 657
 658         if (!src_ring)
 659                 return -EIO;
 660
 661         ar = ce_state->ar;
 662         ar_pci = ath10k_pci_priv(ar);
 663
 664         spin_lock_bh(&ar_pci->ce_lock);
 665
 666         nentries_mask = src_ring->nentries_mask;
 667         sw_index = src_ring->sw_index;
 668         write_index = src_ring->write_index;
 669
 670         if (write_index != sw_index) {
 671                 struct ce_desc *base = src_ring->base_addr_owner_space;
 672                 struct ce_desc *desc = CE_SRC_RING_TO_DESC(base, sw_index);
 673
 674                 /* Return data from completed source descriptor */
 675                 *bufferp = __le32_to_cpu(desc->addr);
 676                 *nbytesp = __le16_to_cpu(desc->nbytes);
 677                 *transfer_idp = MS(__le16_to_cpu(desc->flags),
 678                                                 CE_DESC_FLAGS_META_DATA);
 679
 680                 if (per_transfer_contextp)
 681                         *per_transfer_contextp =
 682                                 src_ring->per_transfer_context[sw_index];
 683
 684                 /* sanity */
 685                 src_ring->per_transfer_context[sw_index] = NULL;
 686
 687                 /* Update sw_index */
 688                 sw_index = CE_RING_IDX_INCR(nentries_mask, sw_index);
 689                 src_ring->sw_index = sw_index;
 690                 ret = 0;
 691         } else {
 692                 ret = -EIO;
 693         }
 694
 695         spin_unlock_bh(&ar_pci->ce_lock);
 696
 697         return ret;
 698 }
 699
 700 int ath10k_ce_completed_send_next(struct ath10k_ce_pipe *ce_state,
 701                                   void **per_transfer_contextp,
 702                                   u32 *bufferp,
 703                                   unsigned int *nbytesp,
 704                                   unsigned int *transfer_idp)
 705 {
 706         struct ath10k *ar = ce_state->ar;
 707         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 708         int ret;
 709
 710         spin_lock_bh(&ar_pci->ce_lock);
 711         ret = ath10k_ce_completed_send_next_nolock(ce_state,
 712                                                    per_transfer_contextp,
 713                                                    bufferp, nbytesp,
 714                                                    transfer_idp);
 715         spin_unlock_bh(&ar_pci->ce_lock);
 716
 717         return ret;
 718 }
 719
 720 /*
 721  * Guts of interrupt handler for per-engine interrupts on a particular CE.
 722  *
 723  * Invokes registered callbacks for recv_complete,
 724  * send_complete, and watermarks.
 725  */
 726 void ath10k_ce_per_engine_service(struct ath10k *ar, unsigned int ce_id)
 727 {
 728         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 729         struct ath10k_ce_pipe *ce_state = &ar_pci->ce_states[ce_id];
 730         u32 ctrl_addr = ce_state->ctrl_addr;
 731         int ret;
 732
 733         ret = ath10k_pci_wake(ar);
 734         if (ret)
 735                 return;
 736
 737         spin_lock_bh(&ar_pci->ce_lock);
 738
 739         /* Clear the copy-complete interrupts that will be handled here. */
 740         ath10k_ce_engine_int_status_clear(ar, ctrl_addr,
 741                                           HOST_IS_COPY_COMPLETE_MASK);
 742
 743         spin_unlock_bh(&ar_pci->ce_lock);
 744
 745         if (ce_state->recv_cb)
 746                 ce_state->recv_cb(ce_state);
 747
 748         if (ce_state->send_cb)
 749                 ce_state->send_cb(ce_state);
 750
 751         spin_lock_bh(&ar_pci->ce_lock);
 752
 753         /*
 754          * Misc CE interrupts are not being handled, but still need
 755          * to be cleared.
 756          */
 757         ath10k_ce_engine_int_status_clear(ar, ctrl_addr, CE_WATERMARK_MASK);
 758
 759         spin_unlock_bh(&ar_pci->ce_lock);
 760         ath10k_pci_sleep(ar);
 761 }
 762
 763 /*
 764  * Handler for per-engine interrupts on ALL active CEs.
 765  * This is used in cases where the system is sharing a
 766  * single interrput for all CEs
 767  */
 768
 769 void ath10k_ce_per_engine_service_any(struct ath10k *ar)
 770 {
 771         int ce_id, ret;
 772         u32 intr_summary;
 773
 774         ret = ath10k_pci_wake(ar);
 775         if (ret)
 776                 return;
 777
 778         intr_summary = CE_INTERRUPT_SUMMARY(ar);
 779
 780         for (ce_id = 0; intr_summary && (ce_id < CE_COUNT); ce_id++) {
 781                 if (intr_summary & (1 << ce_id))
 782                         intr_summary &= ~(1 << ce_id);
 783                 else
 784                         /* no intr pending on this CE */
 785                         continue;
 786
 787                 ath10k_ce_per_engine_service(ar, ce_id);
 788         }
 789
 790         ath10k_pci_sleep(ar);
 791 }
 792
 793 /*
 794  * Adjust interrupts for the copy complete handler.
 795  * If it's needed for either send or recv, then unmask
 796  * this interrupt; otherwise, mask it.
 797  *
 798  * Called with ce_lock held.
 799  */
 800 static void ath10k_ce_per_engine_handler_adjust(struct ath10k_ce_pipe *ce_state,
 801                                                 int disable_copy_compl_intr)
 802 {
 803         u32 ctrl_addr = ce_state->ctrl_addr;
 804         struct ath10k *ar = ce_state->ar;
 805         int ret;
 806
 807         ret = ath10k_pci_wake(ar);
 808         if (ret)
 809                 return;
 810
 811         if ((!disable_copy_compl_intr) &&
 812             (ce_state->send_cb || ce_state->recv_cb))
 813                 ath10k_ce_copy_complete_inter_enable(ar, ctrl_addr);
 814         else
 815                 ath10k_ce_copy_complete_intr_disable(ar, ctrl_addr);
 816
 817         ath10k_ce_watermark_intr_disable(ar, ctrl_addr);
 818
 819         ath10k_pci_sleep(ar);
 820 }
 821
 822 int ath10k_ce_disable_interrupts(struct ath10k *ar)
 823 {
 824         int ce_id, ret;
 825
 826         ret = ath10k_pci_wake(ar);
 827         if (ret)
 828                 return ret;
 829
 830         for (ce_id = 0; ce_id < CE_COUNT; ce_id++) {
 831                 u32 ctrl_addr = ath10k_ce_base_address(ce_id);
 832
 833                 ath10k_ce_copy_complete_intr_disable(ar, ctrl_addr);
 834                 ath10k_ce_error_intr_disable(ar, ctrl_addr);
 835                 ath10k_ce_watermark_intr_disable(ar, ctrl_addr);
 836         }
 837
 838         ath10k_pci_sleep(ar);
 839
 840         return 0;
 841 }
 842
 843 void ath10k_ce_send_cb_register(struct ath10k_ce_pipe *ce_state,
 844                                 void (*send_cb)(struct ath10k_ce_pipe *),
 845                                 int disable_interrupts)
 846 {
 847         struct ath10k *ar = ce_state->ar;
 848         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 849
 850         spin_lock_bh(&ar_pci->ce_lock);
 851         ce_state->send_cb = send_cb;
 852         ath10k_ce_per_engine_handler_adjust(ce_state, disable_interrupts);
 853         spin_unlock_bh(&ar_pci->ce_lock);
 854 }
 855
 856 void ath10k_ce_recv_cb_register(struct ath10k_ce_pipe *ce_state,
 857                                 void (*recv_cb)(struct ath10k_ce_pipe *))
 858 {
 859         struct ath10k *ar = ce_state->ar;
 860         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 861
 862         spin_lock_bh(&ar_pci->ce_lock);
 863         ce_state->recv_cb = recv_cb;
 864         ath10k_ce_per_engine_handler_adjust(ce_state, 0);
 865         spin_unlock_bh(&ar_pci->ce_lock);
 866 }
 867
 868 static int ath10k_ce_init_src_ring(struct ath10k *ar,
 869                                    unsigned int ce_id,
 870                                    const struct ce_attr *attr)
 871 {
 872         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 873         struct ath10k_ce_pipe *ce_state = &ar_pci->ce_states[ce_id];
 874         struct ath10k_ce_ring *src_ring = ce_state->src_ring;
 875         u32 nentries, ctrl_addr = ath10k_ce_base_address(ce_id);
 876
 877         nentries = roundup_pow_of_two(attr->src_nentries);
 878
 879         memset(src_ring->per_transfer_context, 0,
 880                nentries * sizeof(*src_ring->per_transfer_context));
 881
 882         src_ring->sw_index = ath10k_ce_src_ring_read_index_get(ar, ctrl_addr);
 883         src_ring->sw_index &= src_ring->nentries_mask;
 884         src_ring->hw_index = src_ring->sw_index;
 885
 886         src_ring->write_index =
 887                 ath10k_ce_src_ring_write_index_get(ar, ctrl_addr);
 888         src_ring->write_index &= src_ring->nentries_mask;
 889
 890         ath10k_ce_src_ring_base_addr_set(ar, ctrl_addr,
 891                                          src_ring->base_addr_ce_space);
 892         ath10k_ce_src_ring_size_set(ar, ctrl_addr, nentries);
 893         ath10k_ce_src_ring_dmax_set(ar, ctrl_addr, attr->src_sz_max);
 894         ath10k_ce_src_ring_byte_swap_set(ar, ctrl_addr, 0);
 895         ath10k_ce_src_ring_lowmark_set(ar, ctrl_addr, 0);
 896         ath10k_ce_src_ring_highmark_set(ar, ctrl_addr, nentries);
 897
 898         ath10k_dbg(ATH10K_DBG_BOOT,
 899                    "boot init ce src ring id %d entries %d base_addr %p\n",
 900                    ce_id, nentries, src_ring->base_addr_owner_space);
 901
 902         return 0;
 903 }
 904
 905 static int ath10k_ce_init_dest_ring(struct ath10k *ar,
 906                                     unsigned int ce_id,
 907                                     const struct ce_attr *attr)
 908 {
 909         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
 910         struct ath10k_ce_pipe *ce_state = &ar_pci->ce_states[ce_id];
 911         struct ath10k_ce_ring *dest_ring = ce_state->dest_ring;
 912         u32 nentries, ctrl_addr = ath10k_ce_base_address(ce_id);
 913
 914         nentries = roundup_pow_of_two(attr->dest_nentries);
 915
 916         memset(dest_ring->per_transfer_context, 0,
 917                nentries * sizeof(*dest_ring->per_transfer_context));
 918
 919         dest_ring->sw_index = ath10k_ce_dest_ring_read_index_get(ar, ctrl_addr);
 920         dest_ring->sw_index &= dest_ring->nentries_mask;
 921         dest_ring->write_index =
 922                 ath10k_ce_dest_ring_write_index_get(ar, ctrl_addr);
 923         dest_ring->write_index &= dest_ring->nentries_mask;
 924
 925         ath10k_ce_dest_ring_base_addr_set(ar, ctrl_addr,
 926                                           dest_ring->base_addr_ce_space);
 927         ath10k_ce_dest_ring_size_set(ar, ctrl_addr, nentries);
 928         ath10k_ce_dest_ring_byte_swap_set(ar, ctrl_addr, 0);
 929         ath10k_ce_dest_ring_lowmark_set(ar, ctrl_addr, 0);
 930         ath10k_ce_dest_ring_highmark_set(ar, ctrl_addr, nentries);
 931
 932         ath10k_dbg(ATH10K_DBG_BOOT,
 933                    "boot ce dest ring id %d entries %d base_addr %p\n",
 934                    ce_id, nentries, dest_ring->base_addr_owner_space);
 935
 936         return 0;
 937 }
 938
 939 static struct ath10k_ce_ring *
 940 ath10k_ce_alloc_src_ring(struct ath10k *ar, unsigned int ce_id,
 941                          const struct ce_attr *attr)
 942 {
 943         struct ath10k_ce_ring *src_ring;
 944         u32 nentries = attr->src_nentries;
 945         dma_addr_t base_addr;
 946
 947         nentries = roundup_pow_of_two(nentries);
 948
 949         src_ring = kzalloc(sizeof(*src_ring) +
 950                            (nentries *
 951                             sizeof(*src_ring->per_transfer_context)),
 952                            GFP_KERNEL);
 953         if (src_ring == NULL)
 954                 return ERR_PTR(-ENOMEM);
 955
 956         src_ring->nentries = nentries;
 957         src_ring->nentries_mask = nentries - 1;
 958
 959         /*
 960          * Legacy platforms that do not support cache
 961          * coherent DMA are unsupported
 962          */
 963         src_ring->base_addr_owner_space_unaligned =
 964                 dma_alloc_coherent(ar->dev,
 965                                    (nentries * sizeof(struct ce_desc) +
 966                                     CE_DESC_RING_ALIGN),
 967                                    &base_addr, GFP_KERNEL);
 968         if (!src_ring->base_addr_owner_space_unaligned) {
 969                 kfree(src_ring);
 970                 return ERR_PTR(-ENOMEM);
 971         }
 972
 973         src_ring->base_addr_ce_space_unaligned = base_addr;
 974
 975         src_ring->base_addr_owner_space = PTR_ALIGN(
 976                         src_ring->base_addr_owner_space_unaligned,
 977                         CE_DESC_RING_ALIGN);
 978         src_ring->base_addr_ce_space = ALIGN(
 979                         src_ring->base_addr_ce_space_unaligned,
 980                         CE_DESC_RING_ALIGN);
 981
 982         /*
 983          * Also allocate a shadow src ring in regular
 984          * mem to use for faster access.
 985          */
 986         src_ring->shadow_base_unaligned =
 987                 kmalloc((nentries * sizeof(struct ce_desc) +
 988                          CE_DESC_RING_ALIGN), GFP_KERNEL);
 989         if (!src_ring->shadow_base_unaligned) {
 990                 dma_free_coherent(ar->dev,
 991                                   (nentries * sizeof(struct ce_desc) +
 992                                    CE_DESC_RING_ALIGN),
 993                                   src_ring->base_addr_owner_space,
 994                                   src_ring->base_addr_ce_space);
 995                 kfree(src_ring);
 996                 return ERR_PTR(-ENOMEM);
 997         }
 998
 999         src_ring->shadow_base = PTR_ALIGN(
1000                         src_ring->shadow_base_unaligned,
1001                         CE_DESC_RING_ALIGN);
1002
1003         return src_ring;
1004 }
1005
1006 static struct ath10k_ce_ring *
1007 ath10k_ce_alloc_dest_ring(struct ath10k *ar, unsigned int ce_id,
1008                           const struct ce_attr *attr)
1009 {
1010         struct ath10k_ce_ring *dest_ring;
1011         u32 nentries;
1012         dma_addr_t base_addr;
1013
1014         nentries = roundup_pow_of_two(attr->dest_nentries);
1015
1016         dest_ring = kzalloc(sizeof(*dest_ring) +
1017                             (nentries *
1018                              sizeof(*dest_ring->per_transfer_context)),
1019                             GFP_KERNEL);
1020         if (dest_ring == NULL)
1021                 return ERR_PTR(-ENOMEM);
1022
1023         dest_ring->nentries = nentries;
1024         dest_ring->nentries_mask = nentries - 1;
1025
1026         /*
1027          * Legacy platforms that do not support cache
1028          * coherent DMA are unsupported
1029          */
1030         dest_ring->base_addr_owner_space_unaligned =
1031                 dma_alloc_coherent(ar->dev,
1032                                    (nentries * sizeof(struct ce_desc) +
1033                                     CE_DESC_RING_ALIGN),
1034                                    &base_addr, GFP_KERNEL);
1035         if (!dest_ring->base_addr_owner_space_unaligned) {
1036                 kfree(dest_ring);
1037                 return ERR_PTR(-ENOMEM);
1038         }
1039
1040         dest_ring->base_addr_ce_space_unaligned = base_addr;
1041
1042         /*
1043          * Correctly initialize memory to 0 to prevent garbage
1044          * data crashing system when download firmware
1045          */
1046         memset(dest_ring->base_addr_owner_space_unaligned, 0,
1047                nentries * sizeof(struct ce_desc) + CE_DESC_RING_ALIGN);
1048
1049         dest_ring->base_addr_owner_space = PTR_ALIGN(
1050                         dest_ring->base_addr_owner_space_unaligned,
1051                         CE_DESC_RING_ALIGN);
1052         dest_ring->base_addr_ce_space = ALIGN(
1053                         dest_ring->base_addr_ce_space_unaligned,
1054                         CE_DESC_RING_ALIGN);
1055
1056         return dest_ring;
1057 }
1058
1059 /*
1060  * Initialize a Copy Engine based on caller-supplied attributes.
1061  * This may be called once to initialize both source and destination
1062  * rings or it may be called twice for separate source and destination
1063  * initialization. It may be that only one side or the other is
1064  * initialized by software/firmware.
1065  */
1066 int ath10k_ce_init_pipe(struct ath10k *ar, unsigned int ce_id,
1067                         const struct ce_attr *attr)
1068 {
1069         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
1070         struct ath10k_ce_pipe *ce_state = &ar_pci->ce_states[ce_id];
1071         int ret;
1072
1073         /*
1074          * Make sure there's enough CE ringbuffer entries for HTT TX to avoid
1075          * additional TX locking checks.
1076          *
1077          * For the lack of a better place do the check here.
1078          */
1079         BUILD_BUG_ON(2*TARGET_NUM_MSDU_DESC >
1080                      (CE_HTT_H2T_MSG_SRC_NENTRIES - 1));
1081         BUILD_BUG_ON(2*TARGET_10X_NUM_MSDU_DESC >
1082                      (CE_HTT_H2T_MSG_SRC_NENTRIES - 1));
1083
1084         ret = ath10k_pci_wake(ar);
1085         if (ret)
1086                 return ret;
1087
1088         spin_lock_bh(&ar_pci->ce_lock);
1089         ce_state->ar = ar;
1090         ce_state->id = ce_id;
1091         ce_state->ctrl_addr = ath10k_ce_base_address(ce_id);
1092         ce_state->attr_flags = attr->flags;
1093         ce_state->src_sz_max = attr->src_sz_max;
1094         spin_unlock_bh(&ar_pci->ce_lock);
1095
1096         if (attr->src_nentries) {
1097                 ret = ath10k_ce_init_src_ring(ar, ce_id, attr);
1098                 if (ret) {
1099                         ath10k_err("Failed to initialize CE src ring for ID: %d (%d)\n",
1100                                    ce_id, ret);
1101                         goto out;
1102                 }
1103         }
1104
1105         if (attr->dest_nentries) {
1106                 ret = ath10k_ce_init_dest_ring(ar, ce_id, attr);
1107                 if (ret) {
1108                         ath10k_err("Failed to initialize CE dest ring for ID: %d (%d)\n",
1109                                    ce_id, ret);
1110                         goto out;
1111                 }
1112         }
1113
1114 out:
1115         ath10k_pci_sleep(ar);
1116         return ret;
1117 }
1118
1119 static void ath10k_ce_deinit_src_ring(struct ath10k *ar, unsigned int ce_id)
1120 {
1121         u32 ctrl_addr = ath10k_ce_base_address(ce_id);
1122
1123         ath10k_ce_src_ring_base_addr_set(ar, ctrl_addr, 0);
1124         ath10k_ce_src_ring_size_set(ar, ctrl_addr, 0);
1125         ath10k_ce_src_ring_dmax_set(ar, ctrl_addr, 0);
1126         ath10k_ce_src_ring_highmark_set(ar, ctrl_addr, 0);
1127 }
1128
1129 static void ath10k_ce_deinit_dest_ring(struct ath10k *ar, unsigned int ce_id)
1130 {
1131         u32 ctrl_addr = ath10k_ce_base_address(ce_id);
1132
1133         ath10k_ce_dest_ring_base_addr_set(ar, ctrl_addr, 0);
1134         ath10k_ce_dest_ring_size_set(ar, ctrl_addr, 0);
1135         ath10k_ce_dest_ring_highmark_set(ar, ctrl_addr, 0);
1136 }
1137
1138 void ath10k_ce_deinit_pipe(struct ath10k *ar, unsigned int ce_id)
1139 {
1140         int ret;
1141
1142         ret = ath10k_pci_wake(ar);
1143         if (ret)
1144                 return;
1145
1146         ath10k_ce_deinit_src_ring(ar, ce_id);
1147         ath10k_ce_deinit_dest_ring(ar, ce_id);
1148
1149         ath10k_pci_sleep(ar);
1150 }
1151
1152 int ath10k_ce_alloc_pipe(struct ath10k *ar, int ce_id,
1153                          const struct ce_attr *attr)
1154 {
1155         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
1156         struct ath10k_ce_pipe *ce_state = &ar_pci->ce_states[ce_id];
1157         int ret;
1158
1159         if (attr->src_nentries) {
1160                 ce_state->src_ring = ath10k_ce_alloc_src_ring(ar, ce_id, attr);
1161                 if (IS_ERR(ce_state->src_ring)) {
1162                         ret = PTR_ERR(ce_state->src_ring);
1163                         ath10k_err("failed to allocate copy engine source ring %d: %d\n",
1164                                    ce_id, ret);
1165                         ce_state->src_ring = NULL;
1166                         return ret;
1167                 }
1168         }
1169
1170         if (attr->dest_nentries) {
1171                 ce_state->dest_ring = ath10k_ce_alloc_dest_ring(ar, ce_id,
1172                                                                 attr);
1173                 if (IS_ERR(ce_state->dest_ring)) {
1174                         ret = PTR_ERR(ce_state->dest_ring);
1175                         ath10k_err("failed to allocate copy engine destination ring %d: %d\n",
1176                                    ce_id, ret);
1177                         ce_state->dest_ring = NULL;
1178                         return ret;
1179                 }
1180         }
1181
1182         return 0;
1183 }
1184
1185 void ath10k_ce_free_pipe(struct ath10k *ar, int ce_id)
1186 {
1187         struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
1188         struct ath10k_ce_pipe *ce_state = &ar_pci->ce_states[ce_id];
1189
1190         if (ce_state->src_ring) {
1191                 kfree(ce_state->src_ring->shadow_base_unaligned);
1192                 dma_free_coherent(ar->dev,
1193                                   (ce_state->src_ring->nentries *
1194                                    sizeof(struct ce_desc) +
1195                                    CE_DESC_RING_ALIGN),
1196                                   ce_state->src_ring->base_addr_owner_space,
1197                                   ce_state->src_ring->base_addr_ce_space);
1198                 kfree(ce_state->src_ring);
1199         }
1200
1201         if (ce_state->dest_ring) {
1202                 dma_free_coherent(ar->dev,
1203                                   (ce_state->dest_ring->nentries *
1204                                    sizeof(struct ce_desc) +
1205                                    CE_DESC_RING_ALIGN),
1206                                   ce_state->dest_ring->base_addr_owner_space,
1207                                   ce_state->dest_ring->base_addr_ce_space);
1208                 kfree(ce_state->dest_ring);
1209         }
1210
1211         ce_state->src_ring = NULL;
1212         ce_state->dest_ring = NULL;
1213 }