drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c

   1 // SPDX-License-Identifier: ISC
   2 /*
   3  * Copyright (c) 2014 Broadcom Corporation
   4  */
   5
   6 /*******************************************************************************
   7  * Communicates with the dongle by using dcmd codes.
   8  * For certain dcmd codes, the dongle interprets string data from the host.
   9  ******************************************************************************/
  10
  11 #include <linux/types.h>
  12 #include <linux/netdevice.h>
  13 #include <linux/etherdevice.h>
  14
  15 #include <brcmu_utils.h>
  16 #include <brcmu_wifi.h>
  17
  18 #include "core.h"
  19 #include "debug.h"
  20 #include "proto.h"
  21 #include "msgbuf.h"
  22 #include "commonring.h"
  23 #include "flowring.h"
  24 #include "bus.h"
  25 #include "tracepoint.h"
  26
  27
  28 #define MSGBUF_IOCTL_RESP_TIMEOUT               msecs_to_jiffies(2000)
  29
  30 #define MSGBUF_TYPE_GEN_STATUS                  0x1
  31 #define MSGBUF_TYPE_RING_STATUS                 0x2
  32 #define MSGBUF_TYPE_FLOW_RING_CREATE            0x3
  33 #define MSGBUF_TYPE_FLOW_RING_CREATE_CMPLT      0x4
  34 #define MSGBUF_TYPE_FLOW_RING_DELETE            0x5
  35 #define MSGBUF_TYPE_FLOW_RING_DELETE_CMPLT      0x6
  36 #define MSGBUF_TYPE_FLOW_RING_FLUSH             0x7
  37 #define MSGBUF_TYPE_FLOW_RING_FLUSH_CMPLT       0x8
  38 #define MSGBUF_TYPE_IOCTLPTR_REQ                0x9
  39 #define MSGBUF_TYPE_IOCTLPTR_REQ_ACK            0xA
  40 #define MSGBUF_TYPE_IOCTLRESP_BUF_POST          0xB
  41 #define MSGBUF_TYPE_IOCTL_CMPLT                 0xC
  42 #define MSGBUF_TYPE_EVENT_BUF_POST              0xD
  43 #define MSGBUF_TYPE_WL_EVENT                    0xE
  44 #define MSGBUF_TYPE_TX_POST                     0xF
  45 #define MSGBUF_TYPE_TX_STATUS                   0x10
  46 #define MSGBUF_TYPE_RXBUF_POST                  0x11
  47 #define MSGBUF_TYPE_RX_CMPLT                    0x12
  48 #define MSGBUF_TYPE_LPBK_DMAXFER                0x13
  49 #define MSGBUF_TYPE_LPBK_DMAXFER_CMPLT          0x14
  50
  51 #define NR_TX_PKTIDS                            2048
  52 #define NR_RX_PKTIDS                            1024
  53
  54 #define BRCMF_IOCTL_REQ_PKTID                   0xFFFE
  55
  56 #define BRCMF_MSGBUF_MAX_PKT_SIZE               2048
  57 #define BRCMF_MSGBUF_MAX_CTL_PKT_SIZE           8192
  58 #define BRCMF_MSGBUF_RXBUFPOST_THRESHOLD        32
  59 #define BRCMF_MSGBUF_MAX_IOCTLRESPBUF_POST      8
  60 #define BRCMF_MSGBUF_MAX_EVENTBUF_POST          8
  61
  62 #define BRCMF_MSGBUF_PKT_FLAGS_FRAME_802_3      0x01
  63 #define BRCMF_MSGBUF_PKT_FLAGS_FRAME_802_11     0x02
  64 #define BRCMF_MSGBUF_PKT_FLAGS_FRAME_MASK       0x07
  65 #define BRCMF_MSGBUF_PKT_FLAGS_PRIO_SHIFT       5
  66
  67 #define BRCMF_MSGBUF_TX_FLUSH_CNT1              32
  68 #define BRCMF_MSGBUF_TX_FLUSH_CNT2              96
  69
  70 #define BRCMF_MSGBUF_DELAY_TXWORKER_THRS        96
  71 #define BRCMF_MSGBUF_TRICKLE_TXWORKER_THRS      32
  72 #define BRCMF_MSGBUF_UPDATE_RX_PTR_THRS         48
  73
  74
  75 struct msgbuf_common_hdr {
  76         u8                              msgtype;
  77         u8                              ifidx;
  78         u8                              flags;
  79         u8                              rsvd0;
  80         __le32                          request_id;
  81 };
  82
  83 struct msgbuf_ioctl_req_hdr {
  84         struct msgbuf_common_hdr        msg;
  85         __le32                          cmd;
  86         __le16                          trans_id;
  87         __le16                          input_buf_len;
  88         __le16                          output_buf_len;
  89         __le16                          rsvd0[3];
  90         struct msgbuf_buf_addr          req_buf_addr;
  91         __le32                          rsvd1[2];
  92 };
  93
  94 struct msgbuf_tx_msghdr {
  95         struct msgbuf_common_hdr        msg;
  96         u8                              txhdr[ETH_HLEN];
  97         u8                              flags;
  98         u8                              seg_cnt;
  99         struct msgbuf_buf_addr          metadata_buf_addr;
 100         struct msgbuf_buf_addr          data_buf_addr;
 101         __le16                          metadata_buf_len;
 102         __le16                          data_len;
 103         __le32                          rsvd0;
 104 };
 105
 106 struct msgbuf_rx_bufpost {
 107         struct msgbuf_common_hdr        msg;
 108         __le16                          metadata_buf_len;
 109         __le16                          data_buf_len;
 110         __le32                          rsvd0;
 111         struct msgbuf_buf_addr          metadata_buf_addr;
 112         struct msgbuf_buf_addr          data_buf_addr;
 113 };
 114
 115 struct msgbuf_rx_ioctl_resp_or_event {
 116         struct msgbuf_common_hdr        msg;
 117         __le16                          host_buf_len;
 118         __le16                          rsvd0[3];
 119         struct msgbuf_buf_addr          host_buf_addr;
 120         __le32                          rsvd1[4];
 121 };
 122
 123 struct msgbuf_completion_hdr {
 124         __le16                          status;
 125         __le16                          flow_ring_id;
 126 };
 127
 128 /* Data struct for the MSGBUF_TYPE_GEN_STATUS */
 129 struct msgbuf_gen_status {
 130         struct msgbuf_common_hdr        msg;
 131         struct msgbuf_completion_hdr    compl_hdr;
 132         __le16                          write_idx;
 133         __le32                          rsvd0[3];
 134 };
 135
 136 /* Data struct for the MSGBUF_TYPE_RING_STATUS */
 137 struct msgbuf_ring_status {
 138         struct msgbuf_common_hdr        msg;
 139         struct msgbuf_completion_hdr    compl_hdr;
 140         __le16                          write_idx;
 141         __le16                          rsvd0[5];
 142 };
 143
 144 struct msgbuf_rx_event {
 145         struct msgbuf_common_hdr        msg;
 146         struct msgbuf_completion_hdr    compl_hdr;
 147         __le16                          event_data_len;
 148         __le16                          seqnum;
 149         __le16                          rsvd0[4];
 150 };
 151
 152 struct msgbuf_ioctl_resp_hdr {
 153         struct msgbuf_common_hdr        msg;
 154         struct msgbuf_completion_hdr    compl_hdr;
 155         __le16                          resp_len;
 156         __le16                          trans_id;
 157         __le32                          cmd;
 158         __le32                          rsvd0;
 159 };
 160
 161 struct msgbuf_tx_status {
 162         struct msgbuf_common_hdr        msg;
 163         struct msgbuf_completion_hdr    compl_hdr;
 164         __le16                          metadata_len;
 165         __le16                          tx_status;
 166 };
 167
 168 struct msgbuf_rx_complete {
 169         struct msgbuf_common_hdr        msg;
 170         struct msgbuf_completion_hdr    compl_hdr;
 171         __le16                          metadata_len;
 172         __le16                          data_len;
 173         __le16                          data_offset;
 174         __le16                          flags;
 175         __le32                          rx_status_0;
 176         __le32                          rx_status_1;
 177         __le32                          rsvd0;
 178 };
 179
 180 struct msgbuf_tx_flowring_create_req {
 181         struct msgbuf_common_hdr        msg;
 182         u8                              da[ETH_ALEN];
 183         u8                              sa[ETH_ALEN];
 184         u8                              tid;
 185         u8                              if_flags;
 186         __le16                          flow_ring_id;
 187         u8                              tc;
 188         u8                              priority;
 189         __le16                          int_vector;
 190         __le16                          max_items;
 191         __le16                          len_item;
 192         struct msgbuf_buf_addr          flow_ring_addr;
 193 };
 194
 195 struct msgbuf_tx_flowring_delete_req {
 196         struct msgbuf_common_hdr        msg;
 197         __le16                          flow_ring_id;
 198         __le16                          reason;
 199         __le32                          rsvd0[7];
 200 };
 201
 202 struct msgbuf_flowring_create_resp {
 203         struct msgbuf_common_hdr        msg;
 204         struct msgbuf_completion_hdr    compl_hdr;
 205         __le32                          rsvd0[3];
 206 };
 207
 208 struct msgbuf_flowring_delete_resp {
 209         struct msgbuf_common_hdr        msg;
 210         struct msgbuf_completion_hdr    compl_hdr;
 211         __le32                          rsvd0[3];
 212 };
 213
 214 struct msgbuf_flowring_flush_resp {
 215         struct msgbuf_common_hdr        msg;
 216         struct msgbuf_completion_hdr    compl_hdr;
 217         __le32                          rsvd0[3];
 218 };
 219
 220 struct brcmf_msgbuf_work_item {
 221         struct list_head queue;
 222         u32 flowid;
 223         int ifidx;
 224         u8 sa[ETH_ALEN];
 225         u8 da[ETH_ALEN];
 226 };
 227
 228 struct brcmf_msgbuf {
 229         struct brcmf_pub *drvr;
 230
 231         struct brcmf_commonring **commonrings;
 232         struct brcmf_commonring **flowrings;
 233         dma_addr_t *flowring_dma_handle;
 234
 235         u16 max_flowrings;
 236         u16 max_submissionrings;
 237         u16 max_completionrings;
 238
 239         u16 rx_dataoffset;
 240         u32 max_rxbufpost;
 241         u16 rx_metadata_offset;
 242         u32 rxbufpost;
 243
 244         u32 max_ioctlrespbuf;
 245         u32 cur_ioctlrespbuf;
 246         u32 max_eventbuf;
 247         u32 cur_eventbuf;
 248
 249         void *ioctbuf;
 250         dma_addr_t ioctbuf_handle;
 251         u32 ioctbuf_phys_hi;
 252         u32 ioctbuf_phys_lo;
 253         int ioctl_resp_status;
 254         u32 ioctl_resp_ret_len;
 255         u32 ioctl_resp_pktid;
 256
 257         u16 data_seq_no;
 258         u16 ioctl_seq_no;
 259         u32 reqid;
 260         wait_queue_head_t ioctl_resp_wait;
 261         bool ctl_completed;
 262
 263         struct brcmf_msgbuf_pktids *tx_pktids;
 264         struct brcmf_msgbuf_pktids *rx_pktids;
 265         struct brcmf_flowring *flow;
 266
 267         struct workqueue_struct *txflow_wq;
 268         struct work_struct txflow_work;
 269         unsigned long *flow_map;
 270         unsigned long *txstatus_done_map;
 271
 272         struct work_struct flowring_work;
 273         spinlock_t flowring_work_lock;
 274         struct list_head work_queue;
 275 };
 276
 277 struct brcmf_msgbuf_pktid {
 278         atomic_t  allocated;
 279         u16 data_offset;
 280         struct sk_buff *skb;
 281         dma_addr_t physaddr;
 282 };
 283
 284 struct brcmf_msgbuf_pktids {
 285         u32 array_size;
 286         u32 last_allocated_idx;
 287         enum dma_data_direction direction;
 288         struct brcmf_msgbuf_pktid *array;
 289 };
 290
 291 static void brcmf_msgbuf_rxbuf_ioctlresp_post(struct brcmf_msgbuf *msgbuf);
 292
 293
 294 static struct brcmf_msgbuf_pktids *
 295 brcmf_msgbuf_init_pktids(u32 nr_array_entries,
 296                          enum dma_data_direction direction)
 297 {
 298         struct brcmf_msgbuf_pktid *array;
 299         struct brcmf_msgbuf_pktids *pktids;
 300
 301         array = kcalloc(nr_array_entries, sizeof(*array), GFP_KERNEL);
 302         if (!array)
 303                 return NULL;
 304
 305         pktids = kzalloc(sizeof(*pktids), GFP_KERNEL);
 306         if (!pktids) {
 307                 kfree(array);
 308                 return NULL;
 309         }
 310         pktids->array = array;
 311         pktids->array_size = nr_array_entries;
 312
 313         return pktids;
 314 }
 315
 316
 317 static int
 318 brcmf_msgbuf_alloc_pktid(struct device *dev,
 319                          struct brcmf_msgbuf_pktids *pktids,
 320                          struct sk_buff *skb, u16 data_offset,
 321                          dma_addr_t *physaddr, u32 *idx)
 322 {
 323         struct brcmf_msgbuf_pktid *array;
 324         u32 count;
 325
 326         array = pktids->array;
 327
 328         *physaddr = dma_map_single(dev, skb->data + data_offset,
 329                                    skb->len - data_offset, pktids->direction);
 330
 331         if (dma_mapping_error(dev, *physaddr)) {
 332                 brcmf_err("dma_map_single failed !!\n");
 333                 return -ENOMEM;
 334         }
 335
 336         *idx = pktids->last_allocated_idx;
 337
 338         count = 0;
 339         do {
 340                 (*idx)++;
 341                 if (*idx == pktids->array_size)
 342                         *idx = 0;
 343                 if (array[*idx].allocated.counter == 0)
 344                         if (atomic_cmpxchg(&array[*idx].allocated, 0, 1) == 0)
 345                                 break;
 346                 count++;
 347         } while (count < pktids->array_size);
 348
 349         if (count == pktids->array_size)
 350                 return -ENOMEM;
 351
 352         array[*idx].data_offset = data_offset;
 353         array[*idx].physaddr = *physaddr;
 354         array[*idx].skb = skb;
 355
 356         pktids->last_allocated_idx = *idx;
 357
 358         return 0;
 359 }
 360
 361
 362 static struct sk_buff *
 363 brcmf_msgbuf_get_pktid(struct device *dev, struct brcmf_msgbuf_pktids *pktids,
 364                        u32 idx)
 365 {
 366         struct brcmf_msgbuf_pktid *pktid;
 367         struct sk_buff *skb;
 368
 369         if (idx >= pktids->array_size) {
 370                 brcmf_err("Invalid packet id %d (max %d)\n", idx,
 371                           pktids->array_size);
 372                 return NULL;
 373         }
 374         if (pktids->array[idx].allocated.counter) {
 375                 pktid = &pktids->array[idx];
 376                 dma_unmap_single(dev, pktid->physaddr,
 377                                  pktid->skb->len - pktid->data_offset,
 378                                  pktids->direction);
 379                 skb = pktid->skb;
 380                 pktid->allocated.counter = 0;
 381                 return skb;
 382         } else {
 383                 brcmf_err("Invalid packet id %d (not in use)\n", idx);
 384         }
 385
 386         return NULL;
 387 }
 388
 389
 390 static void
 391 brcmf_msgbuf_release_array(struct device *dev,
 392                            struct brcmf_msgbuf_pktids *pktids)
 393 {
 394         struct brcmf_msgbuf_pktid *array;
 395         struct brcmf_msgbuf_pktid *pktid;
 396         u32 count;
 397
 398         array = pktids->array;
 399         count = 0;
 400         do {
 401                 if (array[count].allocated.counter) {
 402                         pktid = &array[count];
 403                         dma_unmap_single(dev, pktid->physaddr,
 404                                          pktid->skb->len - pktid->data_offset,
 405                                          pktids->direction);
 406                         brcmu_pkt_buf_free_skb(pktid->skb);
 407                 }
 408                 count++;
 409         } while (count < pktids->array_size);
 410
 411         kfree(array);
 412         kfree(pktids);
 413 }
 414
 415
 416 static void brcmf_msgbuf_release_pktids(struct brcmf_msgbuf *msgbuf)
 417 {
 418         if (msgbuf->rx_pktids)
 419                 brcmf_msgbuf_release_array(msgbuf->drvr->bus_if->dev,
 420                                            msgbuf->rx_pktids);
 421         if (msgbuf->tx_pktids)
 422                 brcmf_msgbuf_release_array(msgbuf->drvr->bus_if->dev,
 423                                            msgbuf->tx_pktids);
 424 }
 425
 426
 427 static int brcmf_msgbuf_tx_ioctl(struct brcmf_pub *drvr, int ifidx,
 428                                  uint cmd, void *buf, uint len)
 429 {
 430         struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
 431         struct brcmf_commonring *commonring;
 432         struct msgbuf_ioctl_req_hdr *request;
 433         u16 buf_len;
 434         void *ret_ptr;
 435         int err;
 436
 437         commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
 438         brcmf_commonring_lock(commonring);
 439         ret_ptr = brcmf_commonring_reserve_for_write(commonring);
 440         if (!ret_ptr) {
 441                 bphy_err(drvr, "Failed to reserve space in commonring\n");
 442                 brcmf_commonring_unlock(commonring);
 443                 return -ENOMEM;
 444         }
 445
 446         msgbuf->reqid++;
 447
 448         request = (struct msgbuf_ioctl_req_hdr *)ret_ptr;
 449         request->msg.msgtype = MSGBUF_TYPE_IOCTLPTR_REQ;
 450         request->msg.ifidx = (u8)ifidx;
 451         request->msg.flags = 0;
 452         request->msg.request_id = cpu_to_le32(BRCMF_IOCTL_REQ_PKTID);
 453         request->cmd = cpu_to_le32(cmd);
 454         request->output_buf_len = cpu_to_le16(len);
 455         request->trans_id = cpu_to_le16(msgbuf->reqid);
 456
 457         buf_len = min_t(u16, len, BRCMF_TX_IOCTL_MAX_MSG_SIZE);
 458         request->input_buf_len = cpu_to_le16(buf_len);
 459         request->req_buf_addr.high_addr = cpu_to_le32(msgbuf->ioctbuf_phys_hi);
 460         request->req_buf_addr.low_addr = cpu_to_le32(msgbuf->ioctbuf_phys_lo);
 461         if (buf)
 462                 memcpy(msgbuf->ioctbuf, buf, buf_len);
 463         else
 464                 memset(msgbuf->ioctbuf, 0, buf_len);
 465
 466         err = brcmf_commonring_write_complete(commonring);
 467         brcmf_commonring_unlock(commonring);
 468
 469         return err;
 470 }
 471
 472
 473 static int brcmf_msgbuf_ioctl_resp_wait(struct brcmf_msgbuf *msgbuf)
 474 {
 475         return wait_event_timeout(msgbuf->ioctl_resp_wait,
 476                                   msgbuf->ctl_completed,
 477                                   MSGBUF_IOCTL_RESP_TIMEOUT);
 478 }
 479
 480
 481 static void brcmf_msgbuf_ioctl_resp_wake(struct brcmf_msgbuf *msgbuf)
 482 {
 483         msgbuf->ctl_completed = true;
 484         wake_up(&msgbuf->ioctl_resp_wait);
 485 }
 486
 487
 488 static int brcmf_msgbuf_query_dcmd(struct brcmf_pub *drvr, int ifidx,
 489                                    uint cmd, void *buf, uint len, int *fwerr)
 490 {
 491         struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
 492         struct sk_buff *skb = NULL;
 493         int timeout;
 494         int err;
 495
 496         brcmf_dbg(MSGBUF, "ifidx=%d, cmd=%d, len=%d\n", ifidx, cmd, len);
 497         *fwerr = 0;
 498         msgbuf->ctl_completed = false;
 499         err = brcmf_msgbuf_tx_ioctl(drvr, ifidx, cmd, buf, len);
 500         if (err)
 501                 return err;
 502
 503         timeout = brcmf_msgbuf_ioctl_resp_wait(msgbuf);
 504         if (!timeout) {
 505                 bphy_err(drvr, "Timeout on response for query command\n");
 506                 return -EIO;
 507         }
 508
 509         skb = brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
 510                                      msgbuf->rx_pktids,
 511                                      msgbuf->ioctl_resp_pktid);
 512         if (msgbuf->ioctl_resp_ret_len != 0) {
 513                 if (!skb)
 514                         return -EBADF;
 515
 516                 memcpy(buf, skb->data, (len < msgbuf->ioctl_resp_ret_len) ?
 517                                        len : msgbuf->ioctl_resp_ret_len);
 518         }
 519         brcmu_pkt_buf_free_skb(skb);
 520
 521         *fwerr = msgbuf->ioctl_resp_status;
 522         return 0;
 523 }
 524
 525
 526 static int brcmf_msgbuf_set_dcmd(struct brcmf_pub *drvr, int ifidx,
 527                                  uint cmd, void *buf, uint len, int *fwerr)
 528 {
 529         return brcmf_msgbuf_query_dcmd(drvr, ifidx, cmd, buf, len, fwerr);
 530 }
 531
 532
 533 static int brcmf_msgbuf_hdrpull(struct brcmf_pub *drvr, bool do_fws,
 534                                 struct sk_buff *skb, struct brcmf_if **ifp)
 535 {
 536         return -ENODEV;
 537 }
 538
 539 static void brcmf_msgbuf_rxreorder(struct brcmf_if *ifp, struct sk_buff *skb)
 540 {
 541 }
 542
 543 static void
 544 brcmf_msgbuf_remove_flowring(struct brcmf_msgbuf *msgbuf, u16 flowid)
 545 {
 546         u32 dma_sz;
 547         void *dma_buf;
 548
 549         brcmf_dbg(MSGBUF, "Removing flowring %d\n", flowid);
 550
 551         dma_sz = BRCMF_H2D_TXFLOWRING_MAX_ITEM * BRCMF_H2D_TXFLOWRING_ITEMSIZE;
 552         dma_buf = msgbuf->flowrings[flowid]->buf_addr;
 553         dma_free_coherent(msgbuf->drvr->bus_if->dev, dma_sz, dma_buf,
 554                           msgbuf->flowring_dma_handle[flowid]);
 555
 556         brcmf_flowring_delete(msgbuf->flow, flowid);
 557 }
 558
 559
 560 static struct brcmf_msgbuf_work_item *
 561 brcmf_msgbuf_dequeue_work(struct brcmf_msgbuf *msgbuf)
 562 {
 563         struct brcmf_msgbuf_work_item *work = NULL;
 564         ulong flags;
 565
 566         spin_lock_irqsave(&msgbuf->flowring_work_lock, flags);
 567         if (!list_empty(&msgbuf->work_queue)) {
 568                 work = list_first_entry(&msgbuf->work_queue,
 569                                         struct brcmf_msgbuf_work_item, queue);
 570                 list_del(&work->queue);
 571         }
 572         spin_unlock_irqrestore(&msgbuf->flowring_work_lock, flags);
 573
 574         return work;
 575 }
 576
 577
 578 static u32
 579 brcmf_msgbuf_flowring_create_worker(struct brcmf_msgbuf *msgbuf,
 580                                     struct brcmf_msgbuf_work_item *work)
 581 {
 582         struct brcmf_pub *drvr = msgbuf->drvr;
 583         struct msgbuf_tx_flowring_create_req *create;
 584         struct brcmf_commonring *commonring;
 585         void *ret_ptr;
 586         u32 flowid;
 587         void *dma_buf;
 588         u32 dma_sz;
 589         u64 address;
 590         int err;
 591
 592         flowid = work->flowid;
 593         dma_sz = BRCMF_H2D_TXFLOWRING_MAX_ITEM * BRCMF_H2D_TXFLOWRING_ITEMSIZE;
 594         dma_buf = dma_alloc_coherent(msgbuf->drvr->bus_if->dev, dma_sz,
 595                                      &msgbuf->flowring_dma_handle[flowid],
 596                                      GFP_KERNEL);
 597         if (!dma_buf) {
 598                 bphy_err(drvr, "dma_alloc_coherent failed\n");
 599                 brcmf_flowring_delete(msgbuf->flow, flowid);
 600                 return BRCMF_FLOWRING_INVALID_ID;
 601         }
 602
 603         brcmf_commonring_config(msgbuf->flowrings[flowid],
 604                                 BRCMF_H2D_TXFLOWRING_MAX_ITEM,
 605                                 BRCMF_H2D_TXFLOWRING_ITEMSIZE, dma_buf);
 606
 607         commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
 608         brcmf_commonring_lock(commonring);
 609         ret_ptr = brcmf_commonring_reserve_for_write(commonring);
 610         if (!ret_ptr) {
 611                 bphy_err(drvr, "Failed to reserve space in commonring\n");
 612                 brcmf_commonring_unlock(commonring);
 613                 brcmf_msgbuf_remove_flowring(msgbuf, flowid);
 614                 return BRCMF_FLOWRING_INVALID_ID;
 615         }
 616
 617         create = (struct msgbuf_tx_flowring_create_req *)ret_ptr;
 618         create->msg.msgtype = MSGBUF_TYPE_FLOW_RING_CREATE;
 619         create->msg.ifidx = work->ifidx;
 620         create->msg.request_id = 0;
 621         create->tid = brcmf_flowring_tid(msgbuf->flow, flowid);
 622         create->flow_ring_id = cpu_to_le16(flowid +
 623                                            BRCMF_H2D_MSGRING_FLOWRING_IDSTART);
 624         memcpy(create->sa, work->sa, ETH_ALEN);
 625         memcpy(create->da, work->da, ETH_ALEN);
 626         address = (u64)msgbuf->flowring_dma_handle[flowid];
 627         create->flow_ring_addr.high_addr = cpu_to_le32(address >> 32);
 628         create->flow_ring_addr.low_addr = cpu_to_le32(address & 0xffffffff);
 629         create->max_items = cpu_to_le16(BRCMF_H2D_TXFLOWRING_MAX_ITEM);
 630         create->len_item = cpu_to_le16(BRCMF_H2D_TXFLOWRING_ITEMSIZE);
 631
 632         brcmf_dbg(MSGBUF, "Send Flow Create Req flow ID %d for peer %pM prio %d ifindex %d\n",
 633                   flowid, work->da, create->tid, work->ifidx);
 634
 635         err = brcmf_commonring_write_complete(commonring);
 636         brcmf_commonring_unlock(commonring);
 637         if (err) {
 638                 bphy_err(drvr, "Failed to write commonring\n");
 639                 brcmf_msgbuf_remove_flowring(msgbuf, flowid);
 640                 return BRCMF_FLOWRING_INVALID_ID;
 641         }
 642
 643         return flowid;
 644 }
 645
 646
 647 static void brcmf_msgbuf_flowring_worker(struct work_struct *work)
 648 {
 649         struct brcmf_msgbuf *msgbuf;
 650         struct brcmf_msgbuf_work_item *create;
 651
 652         msgbuf = container_of(work, struct brcmf_msgbuf, flowring_work);
 653
 654         while ((create = brcmf_msgbuf_dequeue_work(msgbuf))) {
 655                 brcmf_msgbuf_flowring_create_worker(msgbuf, create);
 656                 kfree(create);
 657         }
 658 }
 659
 660
 661 static u32 brcmf_msgbuf_flowring_create(struct brcmf_msgbuf *msgbuf, int ifidx,
 662                                         struct sk_buff *skb)
 663 {
 664         struct brcmf_msgbuf_work_item *create;
 665         struct ethhdr *eh = (struct ethhdr *)(skb->data);
 666         u32 flowid;
 667         ulong flags;
 668
 669         create = kzalloc(sizeof(*create), GFP_ATOMIC);
 670         if (create == NULL)
 671                 return BRCMF_FLOWRING_INVALID_ID;
 672
 673         flowid = brcmf_flowring_create(msgbuf->flow, eh->h_dest,
 674                                        skb->priority, ifidx);
 675         if (flowid == BRCMF_FLOWRING_INVALID_ID) {
 676                 kfree(create);
 677                 return flowid;
 678         }
 679
 680         create->flowid = flowid;
 681         create->ifidx = ifidx;
 682         memcpy(create->sa, eh->h_source, ETH_ALEN);
 683         memcpy(create->da, eh->h_dest, ETH_ALEN);
 684
 685         spin_lock_irqsave(&msgbuf->flowring_work_lock, flags);
 686         list_add_tail(&create->queue, &msgbuf->work_queue);
 687         spin_unlock_irqrestore(&msgbuf->flowring_work_lock, flags);
 688         schedule_work(&msgbuf->flowring_work);
 689
 690         return flowid;
 691 }
 692
 693
 694 static void brcmf_msgbuf_txflow(struct brcmf_msgbuf *msgbuf, u16 flowid)
 695 {
 696         struct brcmf_flowring *flow = msgbuf->flow;
 697         struct brcmf_pub *drvr = msgbuf->drvr;
 698         struct brcmf_commonring *commonring;
 699         void *ret_ptr;
 700         u32 count;
 701         struct sk_buff *skb;
 702         dma_addr_t physaddr;
 703         u32 pktid;
 704         struct msgbuf_tx_msghdr *tx_msghdr;
 705         u64 address;
 706
 707         commonring = msgbuf->flowrings[flowid];
 708         if (!brcmf_commonring_write_available(commonring))
 709                 return;
 710
 711         brcmf_commonring_lock(commonring);
 712
 713         count = BRCMF_MSGBUF_TX_FLUSH_CNT2 - BRCMF_MSGBUF_TX_FLUSH_CNT1;
 714         while (brcmf_flowring_qlen(flow, flowid)) {
 715                 skb = brcmf_flowring_dequeue(flow, flowid);
 716                 if (skb == NULL) {
 717                         bphy_err(drvr, "No SKB, but qlen %d\n",
 718                                  brcmf_flowring_qlen(flow, flowid));
 719                         break;
 720                 }
 721                 skb_orphan(skb);
 722                 if (brcmf_msgbuf_alloc_pktid(msgbuf->drvr->bus_if->dev,
 723                                              msgbuf->tx_pktids, skb, ETH_HLEN,
 724                                              &physaddr, &pktid)) {
 725                         brcmf_flowring_reinsert(flow, flowid, skb);
 726                         bphy_err(drvr, "No PKTID available !!\n");
 727                         break;
 728                 }
 729                 ret_ptr = brcmf_commonring_reserve_for_write(commonring);
 730                 if (!ret_ptr) {
 731                         brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
 732                                                msgbuf->tx_pktids, pktid);
 733                         brcmf_flowring_reinsert(flow, flowid, skb);
 734                         break;
 735                 }
 736                 count++;
 737
 738                 tx_msghdr = (struct msgbuf_tx_msghdr *)ret_ptr;
 739
 740                 tx_msghdr->msg.msgtype = MSGBUF_TYPE_TX_POST;
 741                 tx_msghdr->msg.request_id = cpu_to_le32(pktid + 1);
 742                 tx_msghdr->msg.ifidx = brcmf_flowring_ifidx_get(flow, flowid);
 743                 tx_msghdr->flags = BRCMF_MSGBUF_PKT_FLAGS_FRAME_802_3;
 744                 tx_msghdr->flags |= (skb->priority & 0x07) <<
 745                                     BRCMF_MSGBUF_PKT_FLAGS_PRIO_SHIFT;
 746                 tx_msghdr->seg_cnt = 1;
 747                 memcpy(tx_msghdr->txhdr, skb->data, ETH_HLEN);
 748                 tx_msghdr->data_len = cpu_to_le16(skb->len - ETH_HLEN);
 749                 address = (u64)physaddr;
 750                 tx_msghdr->data_buf_addr.high_addr = cpu_to_le32(address >> 32);
 751                 tx_msghdr->data_buf_addr.low_addr =
 752                         cpu_to_le32(address & 0xffffffff);
 753                 tx_msghdr->metadata_buf_len = 0;
 754                 tx_msghdr->metadata_buf_addr.high_addr = 0;
 755                 tx_msghdr->metadata_buf_addr.low_addr = 0;
 756                 atomic_inc(&commonring->outstanding_tx);
 757                 if (count >= BRCMF_MSGBUF_TX_FLUSH_CNT2) {
 758                         brcmf_commonring_write_complete(commonring);
 759                         count = 0;
 760                 }
 761         }
 762         if (count)
 763                 brcmf_commonring_write_complete(commonring);
 764         brcmf_commonring_unlock(commonring);
 765 }
 766
 767
 768 static void brcmf_msgbuf_txflow_worker(struct work_struct *worker)
 769 {
 770         struct brcmf_msgbuf *msgbuf;
 771         u32 flowid;
 772
 773         msgbuf = container_of(worker, struct brcmf_msgbuf, txflow_work);
 774         for_each_set_bit(flowid, msgbuf->flow_map, msgbuf->max_flowrings) {
 775                 clear_bit(flowid, msgbuf->flow_map);
 776                 brcmf_msgbuf_txflow(msgbuf, flowid);
 777         }
 778 }
 779
 780
 781 static int brcmf_msgbuf_schedule_txdata(struct brcmf_msgbuf *msgbuf, u32 flowid,
 782                                         bool force)
 783 {
 784         struct brcmf_commonring *commonring;
 785
 786         set_bit(flowid, msgbuf->flow_map);
 787         commonring = msgbuf->flowrings[flowid];
 788         if ((force) || (atomic_read(&commonring->outstanding_tx) <
 789                         BRCMF_MSGBUF_DELAY_TXWORKER_THRS))
 790                 queue_work(msgbuf->txflow_wq, &msgbuf->txflow_work);
 791
 792         return 0;
 793 }
 794
 795
 796 static int brcmf_msgbuf_tx_queue_data(struct brcmf_pub *drvr, int ifidx,
 797                                       struct sk_buff *skb)
 798 {
 799         struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
 800         struct brcmf_flowring *flow = msgbuf->flow;
 801         struct ethhdr *eh = (struct ethhdr *)(skb->data);
 802         u32 flowid;
 803         u32 queue_count;
 804         bool force;
 805
 806         flowid = brcmf_flowring_lookup(flow, eh->h_dest, skb->priority, ifidx);
 807         if (flowid == BRCMF_FLOWRING_INVALID_ID) {
 808                 flowid = brcmf_msgbuf_flowring_create(msgbuf, ifidx, skb);
 809                 if (flowid == BRCMF_FLOWRING_INVALID_ID)
 810                         return -ENOMEM;
 811         }
 812         queue_count = brcmf_flowring_enqueue(flow, flowid, skb);
 813         force = ((queue_count % BRCMF_MSGBUF_TRICKLE_TXWORKER_THRS) == 0);
 814         brcmf_msgbuf_schedule_txdata(msgbuf, flowid, force);
 815
 816         return 0;
 817 }
 818
 819
 820 static void
 821 brcmf_msgbuf_configure_addr_mode(struct brcmf_pub *drvr, int ifidx,
 822                                  enum proto_addr_mode addr_mode)
 823 {
 824         struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
 825
 826         brcmf_flowring_configure_addr_mode(msgbuf->flow, ifidx, addr_mode);
 827 }
 828
 829
 830 static void
 831 brcmf_msgbuf_delete_peer(struct brcmf_pub *drvr, int ifidx, u8 peer[ETH_ALEN])
 832 {
 833         struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
 834
 835         brcmf_flowring_delete_peer(msgbuf->flow, ifidx, peer);
 836 }
 837
 838
 839 static void
 840 brcmf_msgbuf_add_tdls_peer(struct brcmf_pub *drvr, int ifidx, u8 peer[ETH_ALEN])
 841 {
 842         struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
 843
 844         brcmf_flowring_add_tdls_peer(msgbuf->flow, ifidx, peer);
 845 }
 846
 847
 848 static void
 849 brcmf_msgbuf_process_ioctl_complete(struct brcmf_msgbuf *msgbuf, void *buf)
 850 {
 851         struct msgbuf_ioctl_resp_hdr *ioctl_resp;
 852
 853         ioctl_resp = (struct msgbuf_ioctl_resp_hdr *)buf;
 854
 855         msgbuf->ioctl_resp_status =
 856                         (s16)le16_to_cpu(ioctl_resp->compl_hdr.status);
 857         msgbuf->ioctl_resp_ret_len = le16_to_cpu(ioctl_resp->resp_len);
 858         msgbuf->ioctl_resp_pktid = le32_to_cpu(ioctl_resp->msg.request_id);
 859
 860         brcmf_msgbuf_ioctl_resp_wake(msgbuf);
 861
 862         if (msgbuf->cur_ioctlrespbuf)
 863                 msgbuf->cur_ioctlrespbuf--;
 864         brcmf_msgbuf_rxbuf_ioctlresp_post(msgbuf);
 865 }
 866
 867
 868 static void
 869 brcmf_msgbuf_process_txstatus(struct brcmf_msgbuf *msgbuf, void *buf)
 870 {
 871         struct brcmf_commonring *commonring;
 872         struct msgbuf_tx_status *tx_status;
 873         u32 idx;
 874         struct sk_buff *skb;
 875         u16 flowid;
 876
 877         tx_status = (struct msgbuf_tx_status *)buf;
 878         idx = le32_to_cpu(tx_status->msg.request_id) - 1;
 879         flowid = le16_to_cpu(tx_status->compl_hdr.flow_ring_id);
 880         flowid -= BRCMF_H2D_MSGRING_FLOWRING_IDSTART;
 881         skb = brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
 882                                      msgbuf->tx_pktids, idx);
 883         if (!skb)
 884                 return;
 885
 886         set_bit(flowid, msgbuf->txstatus_done_map);
 887         commonring = msgbuf->flowrings[flowid];
 888         atomic_dec(&commonring->outstanding_tx);
 889
 890         brcmf_txfinalize(brcmf_get_ifp(msgbuf->drvr, tx_status->msg.ifidx),
 891                          skb, true);
 892 }
 893
 894
 895 static u32 brcmf_msgbuf_rxbuf_data_post(struct brcmf_msgbuf *msgbuf, u32 count)
 896 {
 897         struct brcmf_pub *drvr = msgbuf->drvr;
 898         struct brcmf_commonring *commonring;
 899         void *ret_ptr;
 900         struct sk_buff *skb;
 901         u16 alloced;
 902         u32 pktlen;
 903         dma_addr_t physaddr;
 904         struct msgbuf_rx_bufpost *rx_bufpost;
 905         u64 address;
 906         u32 pktid;
 907         u32 i;
 908
 909         commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_RXPOST_SUBMIT];
 910         ret_ptr = brcmf_commonring_reserve_for_write_multiple(commonring,
 911                                                               count,
 912                                                               &alloced);
 913         if (!ret_ptr) {
 914                 brcmf_dbg(MSGBUF, "Failed to reserve space in commonring\n");
 915                 return 0;
 916         }
 917
 918         for (i = 0; i < alloced; i++) {
 919                 rx_bufpost = (struct msgbuf_rx_bufpost *)ret_ptr;
 920                 memset(rx_bufpost, 0, sizeof(*rx_bufpost));
 921
 922                 skb = brcmu_pkt_buf_get_skb(BRCMF_MSGBUF_MAX_PKT_SIZE);
 923
 924                 if (skb == NULL) {
 925                         bphy_err(drvr, "Failed to alloc SKB\n");
 926                         brcmf_commonring_write_cancel(commonring, alloced - i);
 927                         break;
 928                 }
 929
 930                 pktlen = skb->len;
 931                 if (brcmf_msgbuf_alloc_pktid(msgbuf->drvr->bus_if->dev,
 932                                              msgbuf->rx_pktids, skb, 0,
 933                                              &physaddr, &pktid)) {
 934                         dev_kfree_skb_any(skb);
 935                         bphy_err(drvr, "No PKTID available !!\n");
 936                         brcmf_commonring_write_cancel(commonring, alloced - i);
 937                         break;
 938                 }
 939
 940                 if (msgbuf->rx_metadata_offset) {
 941                         address = (u64)physaddr;
 942                         rx_bufpost->metadata_buf_len =
 943                                 cpu_to_le16(msgbuf->rx_metadata_offset);
 944                         rx_bufpost->metadata_buf_addr.high_addr =
 945                                 cpu_to_le32(address >> 32);
 946                         rx_bufpost->metadata_buf_addr.low_addr =
 947                                 cpu_to_le32(address & 0xffffffff);
 948
 949                         skb_pull(skb, msgbuf->rx_metadata_offset);
 950                         pktlen = skb->len;
 951                         physaddr += msgbuf->rx_metadata_offset;
 952                 }
 953                 rx_bufpost->msg.msgtype = MSGBUF_TYPE_RXBUF_POST;
 954                 rx_bufpost->msg.request_id = cpu_to_le32(pktid);
 955
 956                 address = (u64)physaddr;
 957                 rx_bufpost->data_buf_len = cpu_to_le16((u16)pktlen);
 958                 rx_bufpost->data_buf_addr.high_addr =
 959                         cpu_to_le32(address >> 32);
 960                 rx_bufpost->data_buf_addr.low_addr =
 961                         cpu_to_le32(address & 0xffffffff);
 962
 963                 ret_ptr += brcmf_commonring_len_item(commonring);
 964         }
 965
 966         if (i)
 967                 brcmf_commonring_write_complete(commonring);
 968
 969         return i;
 970 }
 971
 972
 973 static void
 974 brcmf_msgbuf_rxbuf_data_fill(struct brcmf_msgbuf *msgbuf)
 975 {
 976         u32 fillbufs;
 977         u32 retcount;
 978
 979         fillbufs = msgbuf->max_rxbufpost - msgbuf->rxbufpost;
 980
 981         while (fillbufs) {
 982                 retcount = brcmf_msgbuf_rxbuf_data_post(msgbuf, fillbufs);
 983                 if (!retcount)
 984                         break;
 985                 msgbuf->rxbufpost += retcount;
 986                 fillbufs -= retcount;
 987         }
 988 }
 989
 990
 991 static void
 992 brcmf_msgbuf_update_rxbufpost_count(struct brcmf_msgbuf *msgbuf, u16 rxcnt)
 993 {
 994         msgbuf->rxbufpost -= rxcnt;
 995         if (msgbuf->rxbufpost <= (msgbuf->max_rxbufpost -
 996                                   BRCMF_MSGBUF_RXBUFPOST_THRESHOLD))
 997                 brcmf_msgbuf_rxbuf_data_fill(msgbuf);
 998 }
 999
1000
1001 static u32
1002 brcmf_msgbuf_rxbuf_ctrl_post(struct brcmf_msgbuf *msgbuf, bool event_buf,
1003                              u32 count)
1004 {
1005         struct brcmf_pub *drvr = msgbuf->drvr;
1006         struct brcmf_commonring *commonring;
1007         void *ret_ptr;
1008         struct sk_buff *skb;
1009         u16 alloced;
1010         u32 pktlen;
1011         dma_addr_t physaddr;
1012         struct msgbuf_rx_ioctl_resp_or_event *rx_bufpost;
1013         u64 address;
1014         u32 pktid;
1015         u32 i;
1016
1017         commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
1018         brcmf_commonring_lock(commonring);
1019         ret_ptr = brcmf_commonring_reserve_for_write_multiple(commonring,
1020                                                               count,
1021                                                               &alloced);
1022         if (!ret_ptr) {
1023                 bphy_err(drvr, "Failed to reserve space in commonring\n");
1024                 brcmf_commonring_unlock(commonring);
1025                 return 0;
1026         }
1027
1028         for (i = 0; i < alloced; i++) {
1029                 rx_bufpost = (struct msgbuf_rx_ioctl_resp_or_event *)ret_ptr;
1030                 memset(rx_bufpost, 0, sizeof(*rx_bufpost));
1031
1032                 skb = brcmu_pkt_buf_get_skb(BRCMF_MSGBUF_MAX_CTL_PKT_SIZE);
1033
1034                 if (skb == NULL) {
1035                         bphy_err(drvr, "Failed to alloc SKB\n");
1036                         brcmf_commonring_write_cancel(commonring, alloced - i);
1037                         break;
1038                 }
1039
1040                 pktlen = skb->len;
1041                 if (brcmf_msgbuf_alloc_pktid(msgbuf->drvr->bus_if->dev,
1042                                              msgbuf->rx_pktids, skb, 0,
1043                                              &physaddr, &pktid)) {
1044                         dev_kfree_skb_any(skb);
1045                         bphy_err(drvr, "No PKTID available !!\n");
1046                         brcmf_commonring_write_cancel(commonring, alloced - i);
1047                         break;
1048                 }
1049                 if (event_buf)
1050                         rx_bufpost->msg.msgtype = MSGBUF_TYPE_EVENT_BUF_POST;
1051                 else
1052                         rx_bufpost->msg.msgtype =
1053                                 MSGBUF_TYPE_IOCTLRESP_BUF_POST;
1054                 rx_bufpost->msg.request_id = cpu_to_le32(pktid);
1055
1056                 address = (u64)physaddr;
1057                 rx_bufpost->host_buf_len = cpu_to_le16((u16)pktlen);
1058                 rx_bufpost->host_buf_addr.high_addr =
1059                         cpu_to_le32(address >> 32);
1060                 rx_bufpost->host_buf_addr.low_addr =
1061                         cpu_to_le32(address & 0xffffffff);
1062
1063                 ret_ptr += brcmf_commonring_len_item(commonring);
1064         }
1065
1066         if (i)
1067                 brcmf_commonring_write_complete(commonring);
1068
1069         brcmf_commonring_unlock(commonring);
1070
1071         return i;
1072 }
1073
1074
1075 static void brcmf_msgbuf_rxbuf_ioctlresp_post(struct brcmf_msgbuf *msgbuf)
1076 {
1077         u32 count;
1078
1079         count = msgbuf->max_ioctlrespbuf - msgbuf->cur_ioctlrespbuf;
1080         count = brcmf_msgbuf_rxbuf_ctrl_post(msgbuf, false, count);
1081         msgbuf->cur_ioctlrespbuf += count;
1082 }
1083
1084
1085 static void brcmf_msgbuf_rxbuf_event_post(struct brcmf_msgbuf *msgbuf)
1086 {
1087         u32 count;
1088
1089         count = msgbuf->max_eventbuf - msgbuf->cur_eventbuf;
1090         count = brcmf_msgbuf_rxbuf_ctrl_post(msgbuf, true, count);
1091         msgbuf->cur_eventbuf += count;
1092 }
1093
1094
1095 static void brcmf_msgbuf_process_event(struct brcmf_msgbuf *msgbuf, void *buf)
1096 {
1097         struct brcmf_pub *drvr = msgbuf->drvr;
1098         struct msgbuf_rx_event *event;
1099         u32 idx;
1100         u16 buflen;
1101         struct sk_buff *skb;
1102         struct brcmf_if *ifp;
1103
1104         event = (struct msgbuf_rx_event *)buf;
1105         idx = le32_to_cpu(event->msg.request_id);
1106         buflen = le16_to_cpu(event->event_data_len);
1107
1108         if (msgbuf->cur_eventbuf)
1109                 msgbuf->cur_eventbuf--;
1110         brcmf_msgbuf_rxbuf_event_post(msgbuf);
1111
1112         skb = brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
1113                                      msgbuf->rx_pktids, idx);
1114         if (!skb)
1115                 return;
1116
1117         if (msgbuf->rx_dataoffset)
1118                 skb_pull(skb, msgbuf->rx_dataoffset);
1119
1120         skb_trim(skb, buflen);
1121
1122         ifp = brcmf_get_ifp(msgbuf->drvr, event->msg.ifidx);
1123         if (!ifp || !ifp->ndev) {
1124                 bphy_err(drvr, "Received pkt for invalid ifidx %d\n",
1125                          event->msg.ifidx);
1126                 goto exit;
1127         }
1128
1129         skb->protocol = eth_type_trans(skb, ifp->ndev);
1130
1131         brcmf_fweh_process_skb(ifp->drvr, skb, 0, GFP_KERNEL);
1132
1133 exit:
1134         brcmu_pkt_buf_free_skb(skb);
1135 }
1136
1137
1138 static void
1139 brcmf_msgbuf_process_rx_complete(struct brcmf_msgbuf *msgbuf, void *buf)
1140 {
1141         struct brcmf_pub *drvr = msgbuf->drvr;
1142         struct msgbuf_rx_complete *rx_complete;
1143         struct sk_buff *skb;
1144         u16 data_offset;
1145         u16 buflen;
1146         u16 flags;
1147         u32 idx;
1148         struct brcmf_if *ifp;
1149
1150         brcmf_msgbuf_update_rxbufpost_count(msgbuf, 1);
1151
1152         rx_complete = (struct msgbuf_rx_complete *)buf;
1153         data_offset = le16_to_cpu(rx_complete->data_offset);
1154         buflen = le16_to_cpu(rx_complete->data_len);
1155         idx = le32_to_cpu(rx_complete->msg.request_id);
1156         flags = le16_to_cpu(rx_complete->flags);
1157
1158         skb = brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
1159                                      msgbuf->rx_pktids, idx);
1160         if (!skb)
1161                 return;
1162
1163         if (data_offset)
1164                 skb_pull(skb, data_offset);
1165         else if (msgbuf->rx_dataoffset)
1166                 skb_pull(skb, msgbuf->rx_dataoffset);
1167
1168         skb_trim(skb, buflen);
1169
1170         if ((flags & BRCMF_MSGBUF_PKT_FLAGS_FRAME_MASK) ==
1171             BRCMF_MSGBUF_PKT_FLAGS_FRAME_802_11) {
1172                 ifp = msgbuf->drvr->mon_if;
1173
1174                 if (!ifp) {
1175                         bphy_err(drvr, "Received unexpected monitor pkt\n");
1176                         brcmu_pkt_buf_free_skb(skb);
1177                         return;
1178                 }
1179
1180                 brcmf_netif_mon_rx(ifp, skb);
1181                 return;
1182         }
1183
1184         ifp = brcmf_get_ifp(msgbuf->drvr, rx_complete->msg.ifidx);
1185         if (!ifp || !ifp->ndev) {
1186                 bphy_err(drvr, "Received pkt for invalid ifidx %d\n",
1187                          rx_complete->msg.ifidx);
1188                 brcmu_pkt_buf_free_skb(skb);
1189                 return;
1190         }
1191
1192         skb->protocol = eth_type_trans(skb, ifp->ndev);
1193         brcmf_netif_rx(ifp, skb);
1194 }
1195
1196 static void brcmf_msgbuf_process_gen_status(struct brcmf_msgbuf *msgbuf,
1197                                             void *buf)
1198 {
1199         struct msgbuf_gen_status *gen_status = buf;
1200         struct brcmf_pub *drvr = msgbuf->drvr;
1201         int err;
1202
1203         err = le16_to_cpu(gen_status->compl_hdr.status);
1204         if (err)
1205                 bphy_err(drvr, "Firmware reported general error: %d\n", err);
1206 }
1207
1208 static void brcmf_msgbuf_process_ring_status(struct brcmf_msgbuf *msgbuf,
1209                                              void *buf)
1210 {
1211         struct msgbuf_ring_status *ring_status = buf;
1212         struct brcmf_pub *drvr = msgbuf->drvr;
1213         int err;
1214
1215         err = le16_to_cpu(ring_status->compl_hdr.status);
1216         if (err) {
1217                 int ring = le16_to_cpu(ring_status->compl_hdr.flow_ring_id);
1218
1219                 bphy_err(drvr, "Firmware reported ring %d error: %d\n", ring,
1220                          err);
1221         }
1222 }
1223
1224 static void
1225 brcmf_msgbuf_process_flow_ring_create_response(struct brcmf_msgbuf *msgbuf,
1226                                                void *buf)
1227 {
1228         struct brcmf_pub *drvr = msgbuf->drvr;
1229         struct msgbuf_flowring_create_resp *flowring_create_resp;
1230         u16 status;
1231         u16 flowid;
1232
1233         flowring_create_resp = (struct msgbuf_flowring_create_resp *)buf;
1234
1235         flowid = le16_to_cpu(flowring_create_resp->compl_hdr.flow_ring_id);
1236         flowid -= BRCMF_H2D_MSGRING_FLOWRING_IDSTART;
1237         status =  le16_to_cpu(flowring_create_resp->compl_hdr.status);
1238
1239         if (status) {
1240                 bphy_err(drvr, "Flowring creation failed, code %d\n", status);
1241                 brcmf_msgbuf_remove_flowring(msgbuf, flowid);
1242                 return;
1243         }
1244         brcmf_dbg(MSGBUF, "Flowring %d Create response status %d\n", flowid,
1245                   status);
1246
1247         brcmf_flowring_open(msgbuf->flow, flowid);
1248
1249         brcmf_msgbuf_schedule_txdata(msgbuf, flowid, true);
1250 }
1251
1252
1253 static void
1254 brcmf_msgbuf_process_flow_ring_delete_response(struct brcmf_msgbuf *msgbuf,
1255                                                void *buf)
1256 {
1257         struct brcmf_pub *drvr = msgbuf->drvr;
1258         struct msgbuf_flowring_delete_resp *flowring_delete_resp;
1259         u16 status;
1260         u16 flowid;
1261
1262         flowring_delete_resp = (struct msgbuf_flowring_delete_resp *)buf;
1263
1264         flowid = le16_to_cpu(flowring_delete_resp->compl_hdr.flow_ring_id);
1265         flowid -= BRCMF_H2D_MSGRING_FLOWRING_IDSTART;
1266         status =  le16_to_cpu(flowring_delete_resp->compl_hdr.status);
1267
1268         if (status) {
1269                 bphy_err(drvr, "Flowring deletion failed, code %d\n", status);
1270                 brcmf_flowring_delete(msgbuf->flow, flowid);
1271                 return;
1272         }
1273         brcmf_dbg(MSGBUF, "Flowring %d Delete response status %d\n", flowid,
1274                   status);
1275
1276         brcmf_msgbuf_remove_flowring(msgbuf, flowid);
1277 }
1278
1279
1280 static void brcmf_msgbuf_process_msgtype(struct brcmf_msgbuf *msgbuf, void *buf)
1281 {
1282         struct brcmf_pub *drvr = msgbuf->drvr;
1283         struct msgbuf_common_hdr *msg;
1284
1285         msg = (struct msgbuf_common_hdr *)buf;
1286         switch (msg->msgtype) {
1287         case MSGBUF_TYPE_GEN_STATUS:
1288                 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_GEN_STATUS\n");
1289                 brcmf_msgbuf_process_gen_status(msgbuf, buf);
1290                 break;
1291         case MSGBUF_TYPE_RING_STATUS:
1292                 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_RING_STATUS\n");
1293                 brcmf_msgbuf_process_ring_status(msgbuf, buf);
1294                 break;
1295         case MSGBUF_TYPE_FLOW_RING_CREATE_CMPLT:
1296                 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_FLOW_RING_CREATE_CMPLT\n");
1297                 brcmf_msgbuf_process_flow_ring_create_response(msgbuf, buf);
1298                 break;
1299         case MSGBUF_TYPE_FLOW_RING_DELETE_CMPLT:
1300                 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_FLOW_RING_DELETE_CMPLT\n");
1301                 brcmf_msgbuf_process_flow_ring_delete_response(msgbuf, buf);
1302                 break;
1303         case MSGBUF_TYPE_IOCTLPTR_REQ_ACK:
1304                 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_IOCTLPTR_REQ_ACK\n");
1305                 break;
1306         case MSGBUF_TYPE_IOCTL_CMPLT:
1307                 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_IOCTL_CMPLT\n");
1308                 brcmf_msgbuf_process_ioctl_complete(msgbuf, buf);
1309                 break;
1310         case MSGBUF_TYPE_WL_EVENT:
1311                 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_WL_EVENT\n");
1312                 brcmf_msgbuf_process_event(msgbuf, buf);
1313                 break;
1314         case MSGBUF_TYPE_TX_STATUS:
1315                 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_TX_STATUS\n");
1316                 brcmf_msgbuf_process_txstatus(msgbuf, buf);
1317                 break;
1318         case MSGBUF_TYPE_RX_CMPLT:
1319                 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_RX_CMPLT\n");
1320                 brcmf_msgbuf_process_rx_complete(msgbuf, buf);
1321                 break;
1322         default:
1323                 bphy_err(drvr, "Unsupported msgtype %d\n", msg->msgtype);
1324                 break;
1325         }
1326 }
1327
1328
1329 static void brcmf_msgbuf_process_rx(struct brcmf_msgbuf *msgbuf,
1330                                     struct brcmf_commonring *commonring)
1331 {
1332         void *buf;
1333         u16 count;
1334         u16 processed;
1335
1336 again:
1337         buf = brcmf_commonring_get_read_ptr(commonring, &count);
1338         if (buf == NULL)
1339                 return;
1340
1341         processed = 0;
1342         while (count) {
1343                 brcmf_msgbuf_process_msgtype(msgbuf,
1344                                              buf + msgbuf->rx_dataoffset);
1345                 buf += brcmf_commonring_len_item(commonring);
1346                 processed++;
1347                 if (processed == BRCMF_MSGBUF_UPDATE_RX_PTR_THRS) {
1348                         brcmf_commonring_read_complete(commonring, processed);
1349                         processed = 0;
1350                 }
1351                 count--;
1352         }
1353         if (processed)
1354                 brcmf_commonring_read_complete(commonring, processed);
1355
1356         if (commonring->r_ptr == 0)
1357                 goto again;
1358 }
1359
1360
1361 int brcmf_proto_msgbuf_rx_trigger(struct device *dev)
1362 {
1363         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1364         struct brcmf_pub *drvr = bus_if->drvr;
1365         struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
1366         struct brcmf_commonring *commonring;
1367         void *buf;
1368         u32 flowid;
1369         int qlen;
1370
1371         buf = msgbuf->commonrings[BRCMF_D2H_MSGRING_RX_COMPLETE];
1372         brcmf_msgbuf_process_rx(msgbuf, buf);
1373         buf = msgbuf->commonrings[BRCMF_D2H_MSGRING_TX_COMPLETE];
1374         brcmf_msgbuf_process_rx(msgbuf, buf);
1375         buf = msgbuf->commonrings[BRCMF_D2H_MSGRING_CONTROL_COMPLETE];
1376         brcmf_msgbuf_process_rx(msgbuf, buf);
1377
1378         for_each_set_bit(flowid, msgbuf->txstatus_done_map,
1379                          msgbuf->max_flowrings) {
1380                 clear_bit(flowid, msgbuf->txstatus_done_map);
1381                 commonring = msgbuf->flowrings[flowid];
1382                 qlen = brcmf_flowring_qlen(msgbuf->flow, flowid);
1383                 if ((qlen > BRCMF_MSGBUF_TRICKLE_TXWORKER_THRS) ||
1384                     ((qlen) && (atomic_read(&commonring->outstanding_tx) <
1385                                 BRCMF_MSGBUF_TRICKLE_TXWORKER_THRS)))
1386                         brcmf_msgbuf_schedule_txdata(msgbuf, flowid, true);
1387         }
1388
1389         return 0;
1390 }
1391
1392
1393 void brcmf_msgbuf_delete_flowring(struct brcmf_pub *drvr, u16 flowid)
1394 {
1395         struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
1396         struct msgbuf_tx_flowring_delete_req *delete;
1397         struct brcmf_commonring *commonring;
1398         void *ret_ptr;
1399         u8 ifidx;
1400         int err;
1401
1402         /* no need to submit if firmware can not be reached */
1403         if (drvr->bus_if->state != BRCMF_BUS_UP) {
1404                 brcmf_dbg(MSGBUF, "bus down, flowring will be removed\n");
1405                 brcmf_msgbuf_remove_flowring(msgbuf, flowid);
1406                 return;
1407         }
1408
1409         commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
1410         brcmf_commonring_lock(commonring);
1411         ret_ptr = brcmf_commonring_reserve_for_write(commonring);
1412         if (!ret_ptr) {
1413                 bphy_err(drvr, "FW unaware, flowring will be removed !!\n");
1414                 brcmf_commonring_unlock(commonring);
1415                 brcmf_msgbuf_remove_flowring(msgbuf, flowid);
1416                 return;
1417         }
1418
1419         delete = (struct msgbuf_tx_flowring_delete_req *)ret_ptr;
1420
1421         ifidx = brcmf_flowring_ifidx_get(msgbuf->flow, flowid);
1422
1423         delete->msg.msgtype = MSGBUF_TYPE_FLOW_RING_DELETE;
1424         delete->msg.ifidx = ifidx;
1425         delete->msg.request_id = 0;
1426
1427         delete->flow_ring_id = cpu_to_le16(flowid +
1428                                            BRCMF_H2D_MSGRING_FLOWRING_IDSTART);
1429         delete->reason = 0;
1430
1431         brcmf_dbg(MSGBUF, "Send Flow Delete Req flow ID %d, ifindex %d\n",
1432                   flowid, ifidx);
1433
1434         err = brcmf_commonring_write_complete(commonring);
1435         brcmf_commonring_unlock(commonring);
1436         if (err) {
1437                 bphy_err(drvr, "Failed to submit RING_DELETE, flowring will be removed\n");
1438                 brcmf_msgbuf_remove_flowring(msgbuf, flowid);
1439         }
1440 }
1441
1442 #ifdef DEBUG
1443 static int brcmf_msgbuf_stats_read(struct seq_file *seq, void *data)
1444 {
1445         struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
1446         struct brcmf_pub *drvr = bus_if->drvr;
1447         struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
1448         struct brcmf_commonring *commonring;
1449         u16 i;
1450         struct brcmf_flowring_ring *ring;
1451         struct brcmf_flowring_hash *hash;
1452
1453         commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
1454         seq_printf(seq, "h2d_ctl_submit: rp %4u, wp %4u, depth %4u\n",
1455                    commonring->r_ptr, commonring->w_ptr, commonring->depth);
1456         commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_RXPOST_SUBMIT];
1457         seq_printf(seq, "h2d_rx_submit:  rp %4u, wp %4u, depth %4u\n",
1458                    commonring->r_ptr, commonring->w_ptr, commonring->depth);
1459         commonring = msgbuf->commonrings[BRCMF_D2H_MSGRING_CONTROL_COMPLETE];
1460         seq_printf(seq, "d2h_ctl_cmplt:  rp %4u, wp %4u, depth %4u\n",
1461                    commonring->r_ptr, commonring->w_ptr, commonring->depth);
1462         commonring = msgbuf->commonrings[BRCMF_D2H_MSGRING_TX_COMPLETE];
1463         seq_printf(seq, "d2h_tx_cmplt:   rp %4u, wp %4u, depth %4u\n",
1464                    commonring->r_ptr, commonring->w_ptr, commonring->depth);
1465         commonring = msgbuf->commonrings[BRCMF_D2H_MSGRING_RX_COMPLETE];
1466         seq_printf(seq, "d2h_rx_cmplt:   rp %4u, wp %4u, depth %4u\n",
1467                    commonring->r_ptr, commonring->w_ptr, commonring->depth);
1468
1469         seq_printf(seq, "\nh2d_flowrings: depth %u\n",
1470                    BRCMF_H2D_TXFLOWRING_MAX_ITEM);
1471         seq_puts(seq, "Active flowrings:\n");
1472         for (i = 0; i < msgbuf->flow->nrofrings; i++) {
1473                 if (!msgbuf->flow->rings[i])
1474                         continue;
1475                 ring = msgbuf->flow->rings[i];
1476                 if (ring->status != RING_OPEN)
1477                         continue;
1478                 commonring = msgbuf->flowrings[i];
1479                 hash = &msgbuf->flow->hash[ring->hash_id];
1480                 seq_printf(seq, "id %3u: rp %4u, wp %4u, qlen %4u, blocked %u\n"
1481                                 "        ifidx %u, fifo %u, da %pM\n",
1482                                 i, commonring->r_ptr, commonring->w_ptr,
1483                                 skb_queue_len(&ring->skblist), ring->blocked,
1484                                 hash->ifidx, hash->fifo, hash->mac);
1485         }
1486
1487         return 0;
1488 }
1489 #else
1490 static int brcmf_msgbuf_stats_read(struct seq_file *seq, void *data)
1491 {
1492         return 0;
1493 }
1494 #endif
1495
1496 static void brcmf_msgbuf_debugfs_create(struct brcmf_pub *drvr)
1497 {
1498         brcmf_debugfs_add_entry(drvr, "msgbuf_stats", brcmf_msgbuf_stats_read);
1499 }
1500
1501 int brcmf_proto_msgbuf_attach(struct brcmf_pub *drvr)
1502 {
1503         struct brcmf_bus_msgbuf *if_msgbuf;
1504         struct brcmf_msgbuf *msgbuf;
1505         u64 address;
1506         u32 count;
1507
1508         if_msgbuf = drvr->bus_if->msgbuf;
1509
1510         if (if_msgbuf->max_flowrings >= BRCMF_FLOWRING_HASHSIZE) {
1511                 bphy_err(drvr, "driver not configured for this many flowrings %d\n",
1512                          if_msgbuf->max_flowrings);
1513                 if_msgbuf->max_flowrings = BRCMF_FLOWRING_HASHSIZE - 1;
1514         }
1515
1516         msgbuf = kzalloc(sizeof(*msgbuf), GFP_KERNEL);
1517         if (!msgbuf)
1518                 goto fail;
1519
1520         msgbuf->txflow_wq = create_singlethread_workqueue("msgbuf_txflow");
1521         if (msgbuf->txflow_wq == NULL) {
1522                 bphy_err(drvr, "workqueue creation failed\n");
1523                 goto fail;
1524         }
1525         INIT_WORK(&msgbuf->txflow_work, brcmf_msgbuf_txflow_worker);
1526         count = BITS_TO_LONGS(if_msgbuf->max_flowrings);
1527         count = count * sizeof(unsigned long);
1528         msgbuf->flow_map = kzalloc(count, GFP_KERNEL);
1529         if (!msgbuf->flow_map)
1530                 goto fail;
1531
1532         msgbuf->txstatus_done_map = kzalloc(count, GFP_KERNEL);
1533         if (!msgbuf->txstatus_done_map)
1534                 goto fail;
1535
1536         msgbuf->drvr = drvr;
1537         msgbuf->ioctbuf = dma_alloc_coherent(drvr->bus_if->dev,
1538                                              BRCMF_TX_IOCTL_MAX_MSG_SIZE,
1539                                              &msgbuf->ioctbuf_handle,
1540                                              GFP_KERNEL);
1541         if (!msgbuf->ioctbuf)
1542                 goto fail;
1543         address = (u64)msgbuf->ioctbuf_handle;
1544         msgbuf->ioctbuf_phys_hi = address >> 32;
1545         msgbuf->ioctbuf_phys_lo = address & 0xffffffff;
1546
1547         drvr->proto->hdrpull = brcmf_msgbuf_hdrpull;
1548         drvr->proto->query_dcmd = brcmf_msgbuf_query_dcmd;
1549         drvr->proto->set_dcmd = brcmf_msgbuf_set_dcmd;
1550         drvr->proto->tx_queue_data = brcmf_msgbuf_tx_queue_data;
1551         drvr->proto->configure_addr_mode = brcmf_msgbuf_configure_addr_mode;
1552         drvr->proto->delete_peer = brcmf_msgbuf_delete_peer;
1553         drvr->proto->add_tdls_peer = brcmf_msgbuf_add_tdls_peer;
1554         drvr->proto->rxreorder = brcmf_msgbuf_rxreorder;
1555         drvr->proto->debugfs_create = brcmf_msgbuf_debugfs_create;
1556         drvr->proto->pd = msgbuf;
1557
1558         init_waitqueue_head(&msgbuf->ioctl_resp_wait);
1559
1560         msgbuf->commonrings =
1561                 (struct brcmf_commonring **)if_msgbuf->commonrings;
1562         msgbuf->flowrings = (struct brcmf_commonring **)if_msgbuf->flowrings;
1563         msgbuf->max_flowrings = if_msgbuf->max_flowrings;
1564         msgbuf->flowring_dma_handle =
1565                 kcalloc(msgbuf->max_flowrings,
1566                         sizeof(*msgbuf->flowring_dma_handle), GFP_KERNEL);
1567         if (!msgbuf->flowring_dma_handle)
1568                 goto fail;
1569
1570         msgbuf->rx_dataoffset = if_msgbuf->rx_dataoffset;
1571         msgbuf->max_rxbufpost = if_msgbuf->max_rxbufpost;
1572
1573         msgbuf->max_ioctlrespbuf = BRCMF_MSGBUF_MAX_IOCTLRESPBUF_POST;
1574         msgbuf->max_eventbuf = BRCMF_MSGBUF_MAX_EVENTBUF_POST;
1575
1576         msgbuf->tx_pktids = brcmf_msgbuf_init_pktids(NR_TX_PKTIDS,
1577                                                      DMA_TO_DEVICE);
1578         if (!msgbuf->tx_pktids)
1579                 goto fail;
1580         msgbuf->rx_pktids = brcmf_msgbuf_init_pktids(NR_RX_PKTIDS,
1581                                                      DMA_FROM_DEVICE);
1582         if (!msgbuf->rx_pktids)
1583                 goto fail;
1584
1585         msgbuf->flow = brcmf_flowring_attach(drvr->bus_if->dev,
1586                                              if_msgbuf->max_flowrings);
1587         if (!msgbuf->flow)
1588                 goto fail;
1589
1590
1591         brcmf_dbg(MSGBUF, "Feeding buffers, rx data %d, rx event %d, rx ioctl resp %d\n",
1592                   msgbuf->max_rxbufpost, msgbuf->max_eventbuf,
1593                   msgbuf->max_ioctlrespbuf);
1594         count = 0;
1595         do {
1596                 brcmf_msgbuf_rxbuf_data_fill(msgbuf);
1597                 if (msgbuf->max_rxbufpost != msgbuf->rxbufpost)
1598                         msleep(10);
1599                 else
1600                         break;
1601                 count++;
1602         } while (count < 10);
1603         brcmf_msgbuf_rxbuf_event_post(msgbuf);
1604         brcmf_msgbuf_rxbuf_ioctlresp_post(msgbuf);
1605
1606         INIT_WORK(&msgbuf->flowring_work, brcmf_msgbuf_flowring_worker);
1607         spin_lock_init(&msgbuf->flowring_work_lock);
1608         INIT_LIST_HEAD(&msgbuf->work_queue);
1609
1610         return 0;
1611
1612 fail:
1613         if (msgbuf) {
1614                 kfree(msgbuf->flow_map);
1615                 kfree(msgbuf->txstatus_done_map);
1616                 brcmf_msgbuf_release_pktids(msgbuf);
1617                 kfree(msgbuf->flowring_dma_handle);
1618                 if (msgbuf->ioctbuf)
1619                         dma_free_coherent(drvr->bus_if->dev,
1620                                           BRCMF_TX_IOCTL_MAX_MSG_SIZE,
1621                                           msgbuf->ioctbuf,
1622                                           msgbuf->ioctbuf_handle);
1623                 if (msgbuf->txflow_wq)
1624                         destroy_workqueue(msgbuf->txflow_wq);
1625                 kfree(msgbuf);
1626         }
1627         return -ENOMEM;
1628 }
1629
1630
1631 void brcmf_proto_msgbuf_detach(struct brcmf_pub *drvr)
1632 {
1633         struct brcmf_msgbuf *msgbuf;
1634         struct brcmf_msgbuf_work_item *work;
1635
1636         brcmf_dbg(TRACE, "Enter\n");
1637         if (drvr->proto->pd) {
1638                 msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
1639                 cancel_work_sync(&msgbuf->flowring_work);
1640                 while (!list_empty(&msgbuf->work_queue)) {
1641                         work = list_first_entry(&msgbuf->work_queue,
1642                                                 struct brcmf_msgbuf_work_item,
1643                                                 queue);
1644                         list_del(&work->queue);
1645                         kfree(work);
1646                 }
1647                 kfree(msgbuf->flow_map);
1648                 kfree(msgbuf->txstatus_done_map);
1649                 if (msgbuf->txflow_wq)
1650                         destroy_workqueue(msgbuf->txflow_wq);
1651
1652                 brcmf_flowring_detach(msgbuf->flow);
1653                 dma_free_coherent(drvr->bus_if->dev,
1654                                   BRCMF_TX_IOCTL_MAX_MSG_SIZE,
1655                                   msgbuf->ioctbuf, msgbuf->ioctbuf_handle);
1656                 brcmf_msgbuf_release_pktids(msgbuf);
1657                 kfree(msgbuf->flowring_dma_handle);
1658                 kfree(msgbuf);
1659                 drvr->proto->pd = NULL;
1660         }
1661 }