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

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