drivers/net/wireless/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
  24 #include <brcmu_utils.h>
  25 #include <brcmu_wifi.h>
  26
  27 #include "core.h"
  28 #include "debug.h"
  29 #include "proto.h"
  30 #include "msgbuf.h"
  31 #include "commonring.h"
  32 #include "flowring.h"
  33 #include "bus.h"
  34 #include "tracepoint.h"
  35
  36
  37 #define MSGBUF_IOCTL_RESP_TIMEOUT               2000
  38
  39 #define MSGBUF_TYPE_GEN_STATUS                  0x1
  40 #define MSGBUF_TYPE_RING_STATUS                 0x2
  41 #define MSGBUF_TYPE_FLOW_RING_CREATE            0x3
  42 #define MSGBUF_TYPE_FLOW_RING_CREATE_CMPLT      0x4
  43 #define MSGBUF_TYPE_FLOW_RING_DELETE            0x5
  44 #define MSGBUF_TYPE_FLOW_RING_DELETE_CMPLT      0x6
  45 #define MSGBUF_TYPE_FLOW_RING_FLUSH             0x7
  46 #define MSGBUF_TYPE_FLOW_RING_FLUSH_CMPLT       0x8
  47 #define MSGBUF_TYPE_IOCTLPTR_REQ                0x9
  48 #define MSGBUF_TYPE_IOCTLPTR_REQ_ACK            0xA
  49 #define MSGBUF_TYPE_IOCTLRESP_BUF_POST          0xB
  50 #define MSGBUF_TYPE_IOCTL_CMPLT                 0xC
  51 #define MSGBUF_TYPE_EVENT_BUF_POST              0xD
  52 #define MSGBUF_TYPE_WL_EVENT                    0xE
  53 #define MSGBUF_TYPE_TX_POST                     0xF
  54 #define MSGBUF_TYPE_TX_STATUS                   0x10
  55 #define MSGBUF_TYPE_RXBUF_POST                  0x11
  56 #define MSGBUF_TYPE_RX_CMPLT                    0x12
  57 #define MSGBUF_TYPE_LPBK_DMAXFER                0x13
  58 #define MSGBUF_TYPE_LPBK_DMAXFER_CMPLT          0x14
  59
  60 #define NR_TX_PKTIDS                            2048
  61 #define NR_RX_PKTIDS                            1024
  62
  63 #define BRCMF_IOCTL_REQ_PKTID                   0xFFFE
  64
  65 #define BRCMF_MSGBUF_MAX_PKT_SIZE               2048
  66 #define BRCMF_MSGBUF_RXBUFPOST_THRESHOLD        32
  67 #define BRCMF_MSGBUF_MAX_IOCTLRESPBUF_POST      8
  68 #define BRCMF_MSGBUF_MAX_EVENTBUF_POST          8
  69
  70 #define BRCMF_MSGBUF_PKT_FLAGS_FRAME_802_3      0x01
  71 #define BRCMF_MSGBUF_PKT_FLAGS_PRIO_SHIFT       5
  72
  73 #define BRCMF_MSGBUF_TX_FLUSH_CNT1              32
  74 #define BRCMF_MSGBUF_TX_FLUSH_CNT2              96
  75
  76 #define BRCMF_MSGBUF_DELAY_TXWORKER_THRS        96
  77 #define BRCMF_MSGBUF_TRICKLE_TXWORKER_THRS      32
  78 #define BRCMF_MSGBUF_UPDATE_RX_PTR_THRS         48
  79
  80
  81 struct msgbuf_common_hdr {
  82         u8                              msgtype;
  83         u8                              ifidx;
  84         u8                              flags;
  85         u8                              rsvd0;
  86         __le32                          request_id;
  87 };
  88
  89 struct msgbuf_buf_addr {
  90         __le32                          low_addr;
  91         __le32                          high_addr;
  92 };
  93
  94 struct msgbuf_ioctl_req_hdr {
  95         struct msgbuf_common_hdr        msg;
  96         __le32                          cmd;
  97         __le16                          trans_id;
  98         __le16                          input_buf_len;
  99         __le16                          output_buf_len;
 100         __le16                          rsvd0[3];
 101         struct msgbuf_buf_addr          req_buf_addr;
 102         __le32                          rsvd1[2];
 103 };
 104
 105 struct msgbuf_tx_msghdr {
 106         struct msgbuf_common_hdr        msg;
 107         u8                              txhdr[ETH_HLEN];
 108         u8                              flags;
 109         u8                              seg_cnt;
 110         struct msgbuf_buf_addr          metadata_buf_addr;
 111         struct msgbuf_buf_addr          data_buf_addr;
 112         __le16                          metadata_buf_len;
 113         __le16                          data_len;
 114         __le32                          rsvd0;
 115 };
 116
 117 struct msgbuf_rx_bufpost {
 118         struct msgbuf_common_hdr        msg;
 119         __le16                          metadata_buf_len;
 120         __le16                          data_buf_len;
 121         __le32                          rsvd0;
 122         struct msgbuf_buf_addr          metadata_buf_addr;
 123         struct msgbuf_buf_addr          data_buf_addr;
 124 };
 125
 126 struct msgbuf_rx_ioctl_resp_or_event {
 127         struct msgbuf_common_hdr        msg;
 128         __le16                          host_buf_len;
 129         __le16                          rsvd0[3];
 130         struct msgbuf_buf_addr          host_buf_addr;
 131         __le32                          rsvd1[4];
 132 };
 133
 134 struct msgbuf_completion_hdr {
 135         __le16                          status;
 136         __le16                          flow_ring_id;
 137 };
 138
 139 struct msgbuf_rx_event {
 140         struct msgbuf_common_hdr        msg;
 141         struct msgbuf_completion_hdr    compl_hdr;
 142         __le16                          event_data_len;
 143         __le16                          seqnum;
 144         __le16                          rsvd0[4];
 145 };
 146
 147 struct msgbuf_ioctl_resp_hdr {
 148         struct msgbuf_common_hdr        msg;
 149         struct msgbuf_completion_hdr    compl_hdr;
 150         __le16                          resp_len;
 151         __le16                          trans_id;
 152         __le32                          cmd;
 153         __le32                          rsvd0;
 154 };
 155
 156 struct msgbuf_tx_status {
 157         struct msgbuf_common_hdr        msg;
 158         struct msgbuf_completion_hdr    compl_hdr;
 159         __le16                          metadata_len;
 160         __le16                          tx_status;
 161 };
 162
 163 struct msgbuf_rx_complete {
 164         struct msgbuf_common_hdr        msg;
 165         struct msgbuf_completion_hdr    compl_hdr;
 166         __le16                          metadata_len;
 167         __le16                          data_len;
 168         __le16                          data_offset;
 169         __le16                          flags;
 170         __le32                          rx_status_0;
 171         __le32                          rx_status_1;
 172         __le32                          rsvd0;
 173 };
 174
 175 struct msgbuf_tx_flowring_create_req {
 176         struct msgbuf_common_hdr        msg;
 177         u8                              da[ETH_ALEN];
 178         u8                              sa[ETH_ALEN];
 179         u8                              tid;
 180         u8                              if_flags;
 181         __le16                          flow_ring_id;
 182         u8                              tc;
 183         u8                              priority;
 184         __le16                          int_vector;
 185         __le16                          max_items;
 186         __le16                          len_item;
 187         struct msgbuf_buf_addr          flow_ring_addr;
 188 };
 189
 190 struct msgbuf_tx_flowring_delete_req {
 191         struct msgbuf_common_hdr        msg;
 192         __le16                          flow_ring_id;
 193         __le16                          reason;
 194         __le32                          rsvd0[7];
 195 };
 196
 197 struct msgbuf_flowring_create_resp {
 198         struct msgbuf_common_hdr        msg;
 199         struct msgbuf_completion_hdr    compl_hdr;
 200         __le32                          rsvd0[3];
 201 };
 202
 203 struct msgbuf_flowring_delete_resp {
 204         struct msgbuf_common_hdr        msg;
 205         struct msgbuf_completion_hdr    compl_hdr;
 206         __le32                          rsvd0[3];
 207 };
 208
 209 struct msgbuf_flowring_flush_resp {
 210         struct msgbuf_common_hdr        msg;
 211         struct msgbuf_completion_hdr    compl_hdr;
 212         __le32                          rsvd0[3];
 213 };
 214
 215 struct brcmf_msgbuf_work_item {
 216         struct list_head queue;
 217         u32 flowid;
 218         int ifidx;
 219         u8 sa[ETH_ALEN];
 220         u8 da[ETH_ALEN];
 221 };
 222
 223 struct brcmf_msgbuf {
 224         struct brcmf_pub *drvr;
 225
 226         struct brcmf_commonring **commonrings;
 227         struct brcmf_commonring **flowrings;
 228         dma_addr_t *flowring_dma_handle;
 229         u16 nrof_flowrings;
 230
 231         u16 rx_dataoffset;
 232         u32 max_rxbufpost;
 233         u16 rx_metadata_offset;
 234         u32 rxbufpost;
 235
 236         u32 max_ioctlrespbuf;
 237         u32 cur_ioctlrespbuf;
 238         u32 max_eventbuf;
 239         u32 cur_eventbuf;
 240
 241         void *ioctbuf;
 242         dma_addr_t ioctbuf_handle;
 243         u32 ioctbuf_phys_hi;
 244         u32 ioctbuf_phys_lo;
 245         int ioctl_resp_status;
 246         u32 ioctl_resp_ret_len;
 247         u32 ioctl_resp_pktid;
 248
 249         u16 data_seq_no;
 250         u16 ioctl_seq_no;
 251         u32 reqid;
 252         wait_queue_head_t ioctl_resp_wait;
 253         bool ctl_completed;
 254
 255         struct brcmf_msgbuf_pktids *tx_pktids;
 256         struct brcmf_msgbuf_pktids *rx_pktids;
 257         struct brcmf_flowring *flow;
 258
 259         struct workqueue_struct *txflow_wq;
 260         struct work_struct txflow_work;
 261         unsigned long *flow_map;
 262         unsigned long *txstatus_done_map;
 263
 264         struct work_struct flowring_work;
 265         spinlock_t flowring_work_lock;
 266         struct list_head work_queue;
 267 };
 268
 269 struct brcmf_msgbuf_pktid {
 270         atomic_t  allocated;
 271         u16 data_offset;
 272         struct sk_buff *skb;
 273         dma_addr_t physaddr;
 274 };
 275
 276 struct brcmf_msgbuf_pktids {
 277         u32 array_size;
 278         u32 last_allocated_idx;
 279         enum dma_data_direction direction;
 280         struct brcmf_msgbuf_pktid *array;
 281 };
 282
 283 static void brcmf_msgbuf_rxbuf_ioctlresp_post(struct brcmf_msgbuf *msgbuf);
 284
 285
 286 static struct brcmf_msgbuf_pktids *
 287 brcmf_msgbuf_init_pktids(u32 nr_array_entries,
 288                          enum dma_data_direction direction)
 289 {
 290         struct brcmf_msgbuf_pktid *array;
 291         struct brcmf_msgbuf_pktids *pktids;
 292
 293         array = kcalloc(nr_array_entries, sizeof(*array), GFP_KERNEL);
 294         if (!array)
 295                 return NULL;
 296
 297         pktids = kzalloc(sizeof(*pktids), GFP_KERNEL);
 298         if (!pktids) {
 299                 kfree(array);
 300                 return NULL;
 301         }
 302         pktids->array = array;
 303         pktids->array_size = nr_array_entries;
 304
 305         return pktids;
 306 }
 307
 308
 309 static int
 310 brcmf_msgbuf_alloc_pktid(struct device *dev,
 311                          struct brcmf_msgbuf_pktids *pktids,
 312                          struct sk_buff *skb, u16 data_offset,
 313                          dma_addr_t *physaddr, u32 *idx)
 314 {
 315         struct brcmf_msgbuf_pktid *array;
 316         u32 count;
 317
 318         array = pktids->array;
 319
 320         *physaddr = dma_map_single(dev, skb->data + data_offset,
 321                                    skb->len - data_offset, pktids->direction);
 322
 323         if (dma_mapping_error(dev, *physaddr)) {
 324                 brcmf_err("dma_map_single failed !!\n");
 325                 return -ENOMEM;
 326         }
 327
 328         *idx = pktids->last_allocated_idx;
 329
 330         count = 0;
 331         do {
 332                 (*idx)++;
 333                 if (*idx == pktids->array_size)
 334                         *idx = 0;
 335                 if (array[*idx].allocated.counter == 0)
 336                         if (atomic_cmpxchg(&array[*idx].allocated, 0, 1) == 0)
 337                                 break;
 338                 count++;
 339         } while (count < pktids->array_size);
 340
 341         if (count == pktids->array_size)
 342                 return -ENOMEM;
 343
 344         array[*idx].data_offset = data_offset;
 345         array[*idx].physaddr = *physaddr;
 346         array[*idx].skb = skb;
 347
 348         pktids->last_allocated_idx = *idx;
 349
 350         return 0;
 351 }
 352
 353
 354 static struct sk_buff *
 355 brcmf_msgbuf_get_pktid(struct device *dev, struct brcmf_msgbuf_pktids *pktids,
 356                        u32 idx)
 357 {
 358         struct brcmf_msgbuf_pktid *pktid;
 359         struct sk_buff *skb;
 360
 361         if (idx >= pktids->array_size) {
 362                 brcmf_err("Invalid packet id %d (max %d)\n", idx,
 363                           pktids->array_size);
 364                 return NULL;
 365         }
 366         if (pktids->array[idx].allocated.counter) {
 367                 pktid = &pktids->array[idx];
 368                 dma_unmap_single(dev, pktid->physaddr,
 369                                  pktid->skb->len - pktid->data_offset,
 370                                  pktids->direction);
 371                 skb = pktid->skb;
 372                 pktid->allocated.counter = 0;
 373                 return skb;
 374         } else {
 375                 brcmf_err("Invalid packet id %d (not in use)\n", idx);
 376         }
 377
 378         return NULL;
 379 }
 380
 381
 382 static void
 383 brcmf_msgbuf_release_array(struct device *dev,
 384                            struct brcmf_msgbuf_pktids *pktids)
 385 {
 386         struct brcmf_msgbuf_pktid *array;
 387         struct brcmf_msgbuf_pktid *pktid;
 388         u32 count;
 389
 390         array = pktids->array;
 391         count = 0;
 392         do {
 393                 if (array[count].allocated.counter) {
 394                         pktid = &array[count];
 395                         dma_unmap_single(dev, pktid->physaddr,
 396                                          pktid->skb->len - pktid->data_offset,
 397                                          pktids->direction);
 398                         brcmu_pkt_buf_free_skb(pktid->skb);
 399                 }
 400                 count++;
 401         } while (count < pktids->array_size);
 402
 403         kfree(array);
 404         kfree(pktids);
 405 }
 406
 407
 408 static void brcmf_msgbuf_release_pktids(struct brcmf_msgbuf *msgbuf)
 409 {
 410         if (msgbuf->rx_pktids)
 411                 brcmf_msgbuf_release_array(msgbuf->drvr->bus_if->dev,
 412                                            msgbuf->rx_pktids);
 413         if (msgbuf->tx_pktids)
 414                 brcmf_msgbuf_release_array(msgbuf->drvr->bus_if->dev,
 415                                            msgbuf->tx_pktids);
 416 }
 417
 418
 419 static int brcmf_msgbuf_tx_ioctl(struct brcmf_pub *drvr, int ifidx,
 420                                  uint cmd, void *buf, uint len)
 421 {
 422         struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
 423         struct brcmf_commonring *commonring;
 424         struct msgbuf_ioctl_req_hdr *request;
 425         u16 buf_len;
 426         void *ret_ptr;
 427         int err;
 428
 429         commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
 430         brcmf_commonring_lock(commonring);
 431         ret_ptr = brcmf_commonring_reserve_for_write(commonring);
 432         if (!ret_ptr) {
 433                 brcmf_err("Failed to reserve space in commonring\n");
 434                 brcmf_commonring_unlock(commonring);
 435                 return -ENOMEM;
 436         }
 437
 438         msgbuf->reqid++;
 439
 440         request = (struct msgbuf_ioctl_req_hdr *)ret_ptr;
 441         request->msg.msgtype = MSGBUF_TYPE_IOCTLPTR_REQ;
 442         request->msg.ifidx = (u8)ifidx;
 443         request->msg.flags = 0;
 444         request->msg.request_id = cpu_to_le32(BRCMF_IOCTL_REQ_PKTID);
 445         request->cmd = cpu_to_le32(cmd);
 446         request->output_buf_len = cpu_to_le16(len);
 447         request->trans_id = cpu_to_le16(msgbuf->reqid);
 448
 449         buf_len = min_t(u16, len, BRCMF_TX_IOCTL_MAX_MSG_SIZE);
 450         request->input_buf_len = cpu_to_le16(buf_len);
 451         request->req_buf_addr.high_addr = cpu_to_le32(msgbuf->ioctbuf_phys_hi);
 452         request->req_buf_addr.low_addr = cpu_to_le32(msgbuf->ioctbuf_phys_lo);
 453         if (buf)
 454                 memcpy(msgbuf->ioctbuf, buf, buf_len);
 455         else
 456                 memset(msgbuf->ioctbuf, 0, buf_len);
 457
 458         err = brcmf_commonring_write_complete(commonring);
 459         brcmf_commonring_unlock(commonring);
 460
 461         return err;
 462 }
 463
 464
 465 static int brcmf_msgbuf_ioctl_resp_wait(struct brcmf_msgbuf *msgbuf)
 466 {
 467         return wait_event_timeout(msgbuf->ioctl_resp_wait,
 468                                   msgbuf->ctl_completed,
 469                                   msecs_to_jiffies(MSGBUF_IOCTL_RESP_TIMEOUT));
 470 }
 471
 472
 473 static void brcmf_msgbuf_ioctl_resp_wake(struct brcmf_msgbuf *msgbuf)
 474 {
 475         msgbuf->ctl_completed = true;
 476         if (waitqueue_active(&msgbuf->ioctl_resp_wait))
 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)
 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         msgbuf->ctl_completed = false;
 491         err = brcmf_msgbuf_tx_ioctl(drvr, ifidx, cmd, buf, len);
 492         if (err)
 493                 return err;
 494
 495         timeout = brcmf_msgbuf_ioctl_resp_wait(msgbuf);
 496         if (!timeout) {
 497                 brcmf_err("Timeout on response for query command\n");
 498                 return -EIO;
 499         }
 500
 501         skb = brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
 502                                      msgbuf->rx_pktids,
 503                                      msgbuf->ioctl_resp_pktid);
 504         if (msgbuf->ioctl_resp_ret_len != 0) {
 505                 if (!skb)
 506                         return -EBADF;
 507
 508                 memcpy(buf, skb->data, (len < msgbuf->ioctl_resp_ret_len) ?
 509                                        len : msgbuf->ioctl_resp_ret_len);
 510         }
 511         brcmu_pkt_buf_free_skb(skb);
 512
 513         return msgbuf->ioctl_resp_status;
 514 }
 515
 516
 517 static int brcmf_msgbuf_set_dcmd(struct brcmf_pub *drvr, int ifidx,
 518                                  uint cmd, void *buf, uint len)
 519 {
 520         return brcmf_msgbuf_query_dcmd(drvr, ifidx, cmd, buf, len);
 521 }
 522
 523
 524 static int brcmf_msgbuf_hdrpull(struct brcmf_pub *drvr, bool do_fws,
 525                                 struct sk_buff *skb, struct brcmf_if **ifp)
 526 {
 527         return -ENODEV;
 528 }
 529
 530
 531 static void
 532 brcmf_msgbuf_remove_flowring(struct brcmf_msgbuf *msgbuf, u16 flowid)
 533 {
 534         u32 dma_sz;
 535         void *dma_buf;
 536
 537         brcmf_dbg(MSGBUF, "Removing flowring %d\n", flowid);
 538
 539         dma_sz = BRCMF_H2D_TXFLOWRING_MAX_ITEM * BRCMF_H2D_TXFLOWRING_ITEMSIZE;
 540         dma_buf = msgbuf->flowrings[flowid]->buf_addr;
 541         dma_free_coherent(msgbuf->drvr->bus_if->dev, dma_sz, dma_buf,
 542                           msgbuf->flowring_dma_handle[flowid]);
 543
 544         brcmf_flowring_delete(msgbuf->flow, flowid);
 545 }
 546
 547
 548 static struct brcmf_msgbuf_work_item *
 549 brcmf_msgbuf_dequeue_work(struct brcmf_msgbuf *msgbuf)
 550 {
 551         struct brcmf_msgbuf_work_item *work = NULL;
 552         ulong flags;
 553
 554         spin_lock_irqsave(&msgbuf->flowring_work_lock, flags);
 555         if (!list_empty(&msgbuf->work_queue)) {
 556                 work = list_first_entry(&msgbuf->work_queue,
 557                                         struct brcmf_msgbuf_work_item, queue);
 558                 list_del(&work->queue);
 559         }
 560         spin_unlock_irqrestore(&msgbuf->flowring_work_lock, flags);
 561
 562         return work;
 563 }
 564
 565
 566 static u32
 567 brcmf_msgbuf_flowring_create_worker(struct brcmf_msgbuf *msgbuf,
 568                                     struct brcmf_msgbuf_work_item *work)
 569 {
 570         struct msgbuf_tx_flowring_create_req *create;
 571         struct brcmf_commonring *commonring;
 572         void *ret_ptr;
 573         u32 flowid;
 574         void *dma_buf;
 575         u32 dma_sz;
 576         u64 address;
 577         int err;
 578
 579         flowid = work->flowid;
 580         dma_sz = BRCMF_H2D_TXFLOWRING_MAX_ITEM * BRCMF_H2D_TXFLOWRING_ITEMSIZE;
 581         dma_buf = dma_alloc_coherent(msgbuf->drvr->bus_if->dev, dma_sz,
 582                                      &msgbuf->flowring_dma_handle[flowid],
 583                                      GFP_KERNEL);
 584         if (!dma_buf) {
 585                 brcmf_err("dma_alloc_coherent failed\n");
 586                 brcmf_flowring_delete(msgbuf->flow, flowid);
 587                 return BRCMF_FLOWRING_INVALID_ID;
 588         }
 589
 590         brcmf_commonring_config(msgbuf->flowrings[flowid],
 591                                 BRCMF_H2D_TXFLOWRING_MAX_ITEM,
 592                                 BRCMF_H2D_TXFLOWRING_ITEMSIZE, dma_buf);
 593
 594         commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
 595         brcmf_commonring_lock(commonring);
 596         ret_ptr = brcmf_commonring_reserve_for_write(commonring);
 597         if (!ret_ptr) {
 598                 brcmf_err("Failed to reserve space in commonring\n");
 599                 brcmf_commonring_unlock(commonring);
 600                 brcmf_msgbuf_remove_flowring(msgbuf, flowid);
 601                 return BRCMF_FLOWRING_INVALID_ID;
 602         }
 603
 604         create = (struct msgbuf_tx_flowring_create_req *)ret_ptr;
 605         create->msg.msgtype = MSGBUF_TYPE_FLOW_RING_CREATE;
 606         create->msg.ifidx = work->ifidx;
 607         create->msg.request_id = 0;
 608         create->tid = brcmf_flowring_tid(msgbuf->flow, flowid);
 609         create->flow_ring_id = cpu_to_le16(flowid +
 610                                            BRCMF_NROF_H2D_COMMON_MSGRINGS);
 611         memcpy(create->sa, work->sa, ETH_ALEN);
 612         memcpy(create->da, work->da, ETH_ALEN);
 613         address = (u64)msgbuf->flowring_dma_handle[flowid];
 614         create->flow_ring_addr.high_addr = cpu_to_le32(address >> 32);
 615         create->flow_ring_addr.low_addr = cpu_to_le32(address & 0xffffffff);
 616         create->max_items = cpu_to_le16(BRCMF_H2D_TXFLOWRING_MAX_ITEM);
 617         create->len_item = cpu_to_le16(BRCMF_H2D_TXFLOWRING_ITEMSIZE);
 618
 619         brcmf_dbg(MSGBUF, "Send Flow Create Req flow ID %d for peer %pM prio %d ifindex %d\n",
 620                   flowid, work->da, create->tid, work->ifidx);
 621
 622         err = brcmf_commonring_write_complete(commonring);
 623         brcmf_commonring_unlock(commonring);
 624         if (err) {
 625                 brcmf_err("Failed to write commonring\n");
 626                 brcmf_msgbuf_remove_flowring(msgbuf, flowid);
 627                 return BRCMF_FLOWRING_INVALID_ID;
 628         }
 629
 630         return flowid;
 631 }
 632
 633
 634 static void brcmf_msgbuf_flowring_worker(struct work_struct *work)
 635 {
 636         struct brcmf_msgbuf *msgbuf;
 637         struct brcmf_msgbuf_work_item *create;
 638
 639         msgbuf = container_of(work, struct brcmf_msgbuf, flowring_work);
 640
 641         while ((create = brcmf_msgbuf_dequeue_work(msgbuf))) {
 642                 brcmf_msgbuf_flowring_create_worker(msgbuf, create);
 643                 kfree(create);
 644         }
 645 }
 646
 647
 648 static u32 brcmf_msgbuf_flowring_create(struct brcmf_msgbuf *msgbuf, int ifidx,
 649                                         struct sk_buff *skb)
 650 {
 651         struct brcmf_msgbuf_work_item *create;
 652         struct ethhdr *eh = (struct ethhdr *)(skb->data);
 653         u32 flowid;
 654         ulong flags;
 655
 656         create = kzalloc(sizeof(*create), GFP_ATOMIC);
 657         if (create == NULL)
 658                 return BRCMF_FLOWRING_INVALID_ID;
 659
 660         flowid = brcmf_flowring_create(msgbuf->flow, eh->h_dest,
 661                                        skb->priority, ifidx);
 662         if (flowid == BRCMF_FLOWRING_INVALID_ID) {
 663                 kfree(create);
 664                 return flowid;
 665         }
 666
 667         create->flowid = flowid;
 668         create->ifidx = ifidx;
 669         memcpy(create->sa, eh->h_source, ETH_ALEN);
 670         memcpy(create->da, eh->h_dest, ETH_ALEN);
 671
 672         spin_lock_irqsave(&msgbuf->flowring_work_lock, flags);
 673         list_add_tail(&create->queue, &msgbuf->work_queue);
 674         spin_unlock_irqrestore(&msgbuf->flowring_work_lock, flags);
 675         schedule_work(&msgbuf->flowring_work);
 676
 677         return flowid;
 678 }
 679
 680
 681 static void brcmf_msgbuf_txflow(struct brcmf_msgbuf *msgbuf, u8 flowid)
 682 {
 683         struct brcmf_flowring *flow = msgbuf->flow;
 684         struct brcmf_commonring *commonring;
 685         void *ret_ptr;
 686         u32 count;
 687         struct sk_buff *skb;
 688         dma_addr_t physaddr;
 689         u32 pktid;
 690         struct msgbuf_tx_msghdr *tx_msghdr;
 691         u64 address;
 692
 693         commonring = msgbuf->flowrings[flowid];
 694         if (!brcmf_commonring_write_available(commonring))
 695                 return;
 696
 697         brcmf_commonring_lock(commonring);
 698
 699         count = BRCMF_MSGBUF_TX_FLUSH_CNT2 - BRCMF_MSGBUF_TX_FLUSH_CNT1;
 700         while (brcmf_flowring_qlen(flow, flowid)) {
 701                 skb = brcmf_flowring_dequeue(flow, flowid);
 702                 if (skb == NULL) {
 703                         brcmf_err("No SKB, but qlen %d\n",
 704                                   brcmf_flowring_qlen(flow, flowid));
 705                         break;
 706                 }
 707                 skb_orphan(skb);
 708                 if (brcmf_msgbuf_alloc_pktid(msgbuf->drvr->bus_if->dev,
 709                                              msgbuf->tx_pktids, skb, ETH_HLEN,
 710                                              &physaddr, &pktid)) {
 711                         brcmf_flowring_reinsert(flow, flowid, skb);
 712                         brcmf_err("No PKTID available !!\n");
 713                         break;
 714                 }
 715                 ret_ptr = brcmf_commonring_reserve_for_write(commonring);
 716                 if (!ret_ptr) {
 717                         brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
 718                                                msgbuf->tx_pktids, pktid);
 719                         brcmf_flowring_reinsert(flow, flowid, skb);
 720                         break;
 721                 }
 722                 count++;
 723
 724                 tx_msghdr = (struct msgbuf_tx_msghdr *)ret_ptr;
 725
 726                 tx_msghdr->msg.msgtype = MSGBUF_TYPE_TX_POST;
 727                 tx_msghdr->msg.request_id = cpu_to_le32(pktid);
 728                 tx_msghdr->msg.ifidx = brcmf_flowring_ifidx_get(flow, flowid);
 729                 tx_msghdr->flags = BRCMF_MSGBUF_PKT_FLAGS_FRAME_802_3;
 730                 tx_msghdr->flags |= (skb->priority & 0x07) <<
 731                                     BRCMF_MSGBUF_PKT_FLAGS_PRIO_SHIFT;
 732                 tx_msghdr->seg_cnt = 1;
 733                 memcpy(tx_msghdr->txhdr, skb->data, ETH_HLEN);
 734                 tx_msghdr->data_len = cpu_to_le16(skb->len - ETH_HLEN);
 735                 address = (u64)physaddr;
 736                 tx_msghdr->data_buf_addr.high_addr = cpu_to_le32(address >> 32);
 737                 tx_msghdr->data_buf_addr.low_addr =
 738                         cpu_to_le32(address & 0xffffffff);
 739                 tx_msghdr->metadata_buf_len = 0;
 740                 tx_msghdr->metadata_buf_addr.high_addr = 0;
 741                 tx_msghdr->metadata_buf_addr.low_addr = 0;
 742                 atomic_inc(&commonring->outstanding_tx);
 743                 if (count >= BRCMF_MSGBUF_TX_FLUSH_CNT2) {
 744                         brcmf_commonring_write_complete(commonring);
 745                         count = 0;
 746                 }
 747         }
 748         if (count)
 749                 brcmf_commonring_write_complete(commonring);
 750         brcmf_commonring_unlock(commonring);
 751 }
 752
 753
 754 static void brcmf_msgbuf_txflow_worker(struct work_struct *worker)
 755 {
 756         struct brcmf_msgbuf *msgbuf;
 757         u32 flowid;
 758
 759         msgbuf = container_of(worker, struct brcmf_msgbuf, txflow_work);
 760         for_each_set_bit(flowid, msgbuf->flow_map, msgbuf->nrof_flowrings) {
 761                 clear_bit(flowid, msgbuf->flow_map);
 762                 brcmf_msgbuf_txflow(msgbuf, flowid);
 763         }
 764 }
 765
 766
 767 static int brcmf_msgbuf_schedule_txdata(struct brcmf_msgbuf *msgbuf, u32 flowid,
 768                                         bool force)
 769 {
 770         struct brcmf_commonring *commonring;
 771
 772         set_bit(flowid, msgbuf->flow_map);
 773         commonring = msgbuf->flowrings[flowid];
 774         if ((force) || (atomic_read(&commonring->outstanding_tx) <
 775                         BRCMF_MSGBUF_DELAY_TXWORKER_THRS))
 776                 queue_work(msgbuf->txflow_wq, &msgbuf->txflow_work);
 777
 778         return 0;
 779 }
 780
 781
 782 static int brcmf_msgbuf_txdata(struct brcmf_pub *drvr, int ifidx,
 783                                u8 offset, struct sk_buff *skb)
 784 {
 785         struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
 786         struct brcmf_flowring *flow = msgbuf->flow;
 787         struct ethhdr *eh = (struct ethhdr *)(skb->data);
 788         u32 flowid;
 789         u32 queue_count;
 790         bool force;
 791
 792         flowid = brcmf_flowring_lookup(flow, eh->h_dest, skb->priority, ifidx);
 793         if (flowid == BRCMF_FLOWRING_INVALID_ID) {
 794                 flowid = brcmf_msgbuf_flowring_create(msgbuf, ifidx, skb);
 795                 if (flowid == BRCMF_FLOWRING_INVALID_ID)
 796                         return -ENOMEM;
 797         }
 798         queue_count = brcmf_flowring_enqueue(flow, flowid, skb);
 799         force = ((queue_count % BRCMF_MSGBUF_TRICKLE_TXWORKER_THRS) == 0);
 800         brcmf_msgbuf_schedule_txdata(msgbuf, flowid, force);
 801
 802         return 0;
 803 }
 804
 805
 806 static void
 807 brcmf_msgbuf_configure_addr_mode(struct brcmf_pub *drvr, int ifidx,
 808                                  enum proto_addr_mode addr_mode)
 809 {
 810         struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
 811
 812         brcmf_flowring_configure_addr_mode(msgbuf->flow, ifidx, addr_mode);
 813 }
 814
 815
 816 static void
 817 brcmf_msgbuf_delete_peer(struct brcmf_pub *drvr, int ifidx, u8 peer[ETH_ALEN])
 818 {
 819         struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
 820
 821         brcmf_flowring_delete_peer(msgbuf->flow, ifidx, peer);
 822 }
 823
 824
 825 static void
 826 brcmf_msgbuf_add_tdls_peer(struct brcmf_pub *drvr, int ifidx, u8 peer[ETH_ALEN])
 827 {
 828         struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
 829
 830         brcmf_flowring_add_tdls_peer(msgbuf->flow, ifidx, peer);
 831 }
 832
 833
 834 static void
 835 brcmf_msgbuf_process_ioctl_complete(struct brcmf_msgbuf *msgbuf, void *buf)
 836 {
 837         struct msgbuf_ioctl_resp_hdr *ioctl_resp;
 838
 839         ioctl_resp = (struct msgbuf_ioctl_resp_hdr *)buf;
 840
 841         msgbuf->ioctl_resp_status =
 842                         (s16)le16_to_cpu(ioctl_resp->compl_hdr.status);
 843         msgbuf->ioctl_resp_ret_len = le16_to_cpu(ioctl_resp->resp_len);
 844         msgbuf->ioctl_resp_pktid = le32_to_cpu(ioctl_resp->msg.request_id);
 845
 846         brcmf_msgbuf_ioctl_resp_wake(msgbuf);
 847
 848         if (msgbuf->cur_ioctlrespbuf)
 849                 msgbuf->cur_ioctlrespbuf--;
 850         brcmf_msgbuf_rxbuf_ioctlresp_post(msgbuf);
 851 }
 852
 853
 854 static void
 855 brcmf_msgbuf_process_txstatus(struct brcmf_msgbuf *msgbuf, void *buf)
 856 {
 857         struct brcmf_commonring *commonring;
 858         struct msgbuf_tx_status *tx_status;
 859         u32 idx;
 860         struct sk_buff *skb;
 861         u16 flowid;
 862
 863         tx_status = (struct msgbuf_tx_status *)buf;
 864         idx = le32_to_cpu(tx_status->msg.request_id);
 865         flowid = le16_to_cpu(tx_status->compl_hdr.flow_ring_id);
 866         flowid -= BRCMF_NROF_H2D_COMMON_MSGRINGS;
 867         skb = brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
 868                                      msgbuf->tx_pktids, idx);
 869         if (!skb)
 870                 return;
 871
 872         set_bit(flowid, msgbuf->txstatus_done_map);
 873         commonring = msgbuf->flowrings[flowid];
 874         atomic_dec(&commonring->outstanding_tx);
 875
 876         brcmf_txfinalize(brcmf_get_ifp(msgbuf->drvr, tx_status->msg.ifidx),
 877                          skb, true);
 878 }
 879
 880
 881 static u32 brcmf_msgbuf_rxbuf_data_post(struct brcmf_msgbuf *msgbuf, u32 count)
 882 {
 883         struct brcmf_commonring *commonring;
 884         void *ret_ptr;
 885         struct sk_buff *skb;
 886         u16 alloced;
 887         u32 pktlen;
 888         dma_addr_t physaddr;
 889         struct msgbuf_rx_bufpost *rx_bufpost;
 890         u64 address;
 891         u32 pktid;
 892         u32 i;
 893
 894         commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_RXPOST_SUBMIT];
 895         ret_ptr = brcmf_commonring_reserve_for_write_multiple(commonring,
 896                                                               count,
 897                                                               &alloced);
 898         if (!ret_ptr) {
 899                 brcmf_dbg(MSGBUF, "Failed to reserve space in commonring\n");
 900                 return 0;
 901         }
 902
 903         for (i = 0; i < alloced; i++) {
 904                 rx_bufpost = (struct msgbuf_rx_bufpost *)ret_ptr;
 905                 memset(rx_bufpost, 0, sizeof(*rx_bufpost));
 906
 907                 skb = brcmu_pkt_buf_get_skb(BRCMF_MSGBUF_MAX_PKT_SIZE);
 908
 909                 if (skb == NULL) {
 910                         brcmf_err("Failed to alloc SKB\n");
 911                         brcmf_commonring_write_cancel(commonring, alloced - i);
 912                         break;
 913                 }
 914
 915                 pktlen = skb->len;
 916                 if (brcmf_msgbuf_alloc_pktid(msgbuf->drvr->bus_if->dev,
 917                                              msgbuf->rx_pktids, skb, 0,
 918                                              &physaddr, &pktid)) {
 919                         dev_kfree_skb_any(skb);
 920                         brcmf_err("No PKTID available !!\n");
 921                         brcmf_commonring_write_cancel(commonring, alloced - i);
 922                         break;
 923                 }
 924
 925                 if (msgbuf->rx_metadata_offset) {
 926                         address = (u64)physaddr;
 927                         rx_bufpost->metadata_buf_len =
 928                                 cpu_to_le16(msgbuf->rx_metadata_offset);
 929                         rx_bufpost->metadata_buf_addr.high_addr =
 930                                 cpu_to_le32(address >> 32);
 931                         rx_bufpost->metadata_buf_addr.low_addr =
 932                                 cpu_to_le32(address & 0xffffffff);
 933
 934                         skb_pull(skb, msgbuf->rx_metadata_offset);
 935                         pktlen = skb->len;
 936                         physaddr += msgbuf->rx_metadata_offset;
 937                 }
 938                 rx_bufpost->msg.msgtype = MSGBUF_TYPE_RXBUF_POST;
 939                 rx_bufpost->msg.request_id = cpu_to_le32(pktid);
 940
 941                 address = (u64)physaddr;
 942                 rx_bufpost->data_buf_len = cpu_to_le16((u16)pktlen);
 943                 rx_bufpost->data_buf_addr.high_addr =
 944                         cpu_to_le32(address >> 32);
 945                 rx_bufpost->data_buf_addr.low_addr =
 946                         cpu_to_le32(address & 0xffffffff);
 947
 948                 ret_ptr += brcmf_commonring_len_item(commonring);
 949         }
 950
 951         if (i)
 952                 brcmf_commonring_write_complete(commonring);
 953
 954         return i;
 955 }
 956
 957
 958 static void
 959 brcmf_msgbuf_rxbuf_data_fill(struct brcmf_msgbuf *msgbuf)
 960 {
 961         u32 fillbufs;
 962         u32 retcount;
 963
 964         fillbufs = msgbuf->max_rxbufpost - msgbuf->rxbufpost;
 965
 966         while (fillbufs) {
 967                 retcount = brcmf_msgbuf_rxbuf_data_post(msgbuf, fillbufs);
 968                 if (!retcount)
 969                         break;
 970                 msgbuf->rxbufpost += retcount;
 971                 fillbufs -= retcount;
 972         }
 973 }
 974
 975
 976 static void
 977 brcmf_msgbuf_update_rxbufpost_count(struct brcmf_msgbuf *msgbuf, u16 rxcnt)
 978 {
 979         msgbuf->rxbufpost -= rxcnt;
 980         if (msgbuf->rxbufpost <= (msgbuf->max_rxbufpost -
 981                                   BRCMF_MSGBUF_RXBUFPOST_THRESHOLD))
 982                 brcmf_msgbuf_rxbuf_data_fill(msgbuf);
 983 }
 984
 985
 986 static u32
 987 brcmf_msgbuf_rxbuf_ctrl_post(struct brcmf_msgbuf *msgbuf, bool event_buf,
 988                              u32 count)
 989 {
 990         struct brcmf_commonring *commonring;
 991         void *ret_ptr;
 992         struct sk_buff *skb;
 993         u16 alloced;
 994         u32 pktlen;
 995         dma_addr_t physaddr;
 996         struct msgbuf_rx_ioctl_resp_or_event *rx_bufpost;
 997         u64 address;
 998         u32 pktid;
 999         u32 i;
1000
1001         commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
1002         brcmf_commonring_lock(commonring);
1003         ret_ptr = brcmf_commonring_reserve_for_write_multiple(commonring,
1004                                                               count,
1005                                                               &alloced);
1006         if (!ret_ptr) {
1007                 brcmf_err("Failed to reserve space in commonring\n");
1008                 brcmf_commonring_unlock(commonring);
1009                 return 0;
1010         }
1011
1012         for (i = 0; i < alloced; i++) {
1013                 rx_bufpost = (struct msgbuf_rx_ioctl_resp_or_event *)ret_ptr;
1014                 memset(rx_bufpost, 0, sizeof(*rx_bufpost));
1015
1016                 skb = brcmu_pkt_buf_get_skb(BRCMF_MSGBUF_MAX_PKT_SIZE);
1017
1018                 if (skb == NULL) {
1019                         brcmf_err("Failed to alloc SKB\n");
1020                         brcmf_commonring_write_cancel(commonring, alloced - i);
1021                         break;
1022                 }
1023
1024                 pktlen = skb->len;
1025                 if (brcmf_msgbuf_alloc_pktid(msgbuf->drvr->bus_if->dev,
1026                                              msgbuf->rx_pktids, skb, 0,
1027                                              &physaddr, &pktid)) {
1028                         dev_kfree_skb_any(skb);
1029                         brcmf_err("No PKTID available !!\n");
1030                         brcmf_commonring_write_cancel(commonring, alloced - i);
1031                         break;
1032                 }
1033                 if (event_buf)
1034                         rx_bufpost->msg.msgtype = MSGBUF_TYPE_EVENT_BUF_POST;
1035                 else
1036                         rx_bufpost->msg.msgtype =
1037                                 MSGBUF_TYPE_IOCTLRESP_BUF_POST;
1038                 rx_bufpost->msg.request_id = cpu_to_le32(pktid);
1039
1040                 address = (u64)physaddr;
1041                 rx_bufpost->host_buf_len = cpu_to_le16((u16)pktlen);
1042                 rx_bufpost->host_buf_addr.high_addr =
1043                         cpu_to_le32(address >> 32);
1044                 rx_bufpost->host_buf_addr.low_addr =
1045                         cpu_to_le32(address & 0xffffffff);
1046
1047                 ret_ptr += brcmf_commonring_len_item(commonring);
1048         }
1049
1050         if (i)
1051                 brcmf_commonring_write_complete(commonring);
1052
1053         brcmf_commonring_unlock(commonring);
1054
1055         return i;
1056 }
1057
1058
1059 static void brcmf_msgbuf_rxbuf_ioctlresp_post(struct brcmf_msgbuf *msgbuf)
1060 {
1061         u32 count;
1062
1063         count = msgbuf->max_ioctlrespbuf - msgbuf->cur_ioctlrespbuf;
1064         count = brcmf_msgbuf_rxbuf_ctrl_post(msgbuf, false, count);
1065         msgbuf->cur_ioctlrespbuf += count;
1066 }
1067
1068
1069 static void brcmf_msgbuf_rxbuf_event_post(struct brcmf_msgbuf *msgbuf)
1070 {
1071         u32 count;
1072
1073         count = msgbuf->max_eventbuf - msgbuf->cur_eventbuf;
1074         count = brcmf_msgbuf_rxbuf_ctrl_post(msgbuf, true, count);
1075         msgbuf->cur_eventbuf += count;
1076 }
1077
1078
1079 static void
1080 brcmf_msgbuf_rx_skb(struct brcmf_msgbuf *msgbuf, struct sk_buff *skb,
1081                     u8 ifidx)
1082 {
1083         struct brcmf_if *ifp;
1084
1085         ifp = brcmf_get_ifp(msgbuf->drvr, ifidx);
1086         if (!ifp || !ifp->ndev) {
1087                 brcmf_err("Received pkt for invalid ifidx %d\n", ifidx);
1088                 brcmu_pkt_buf_free_skb(skb);
1089                 return;
1090         }
1091         brcmf_netif_rx(ifp, skb);
1092 }
1093
1094
1095 static void brcmf_msgbuf_process_event(struct brcmf_msgbuf *msgbuf, void *buf)
1096 {
1097         struct msgbuf_rx_event *event;
1098         u32 idx;
1099         u16 buflen;
1100         struct sk_buff *skb;
1101
1102         event = (struct msgbuf_rx_event *)buf;
1103         idx = le32_to_cpu(event->msg.request_id);
1104         buflen = le16_to_cpu(event->event_data_len);
1105
1106         if (msgbuf->cur_eventbuf)
1107                 msgbuf->cur_eventbuf--;
1108         brcmf_msgbuf_rxbuf_event_post(msgbuf);
1109
1110         skb = brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
1111                                      msgbuf->rx_pktids, idx);
1112         if (!skb)
1113                 return;
1114
1115         if (msgbuf->rx_dataoffset)
1116                 skb_pull(skb, msgbuf->rx_dataoffset);
1117
1118         skb_trim(skb, buflen);
1119
1120         brcmf_msgbuf_rx_skb(msgbuf, skb, event->msg.ifidx);
1121 }
1122
1123
1124 static void
1125 brcmf_msgbuf_process_rx_complete(struct brcmf_msgbuf *msgbuf, void *buf)
1126 {
1127         struct msgbuf_rx_complete *rx_complete;
1128         struct sk_buff *skb;
1129         u16 data_offset;
1130         u16 buflen;
1131         u32 idx;
1132
1133         brcmf_msgbuf_update_rxbufpost_count(msgbuf, 1);
1134
1135         rx_complete = (struct msgbuf_rx_complete *)buf;
1136         data_offset = le16_to_cpu(rx_complete->data_offset);
1137         buflen = le16_to_cpu(rx_complete->data_len);
1138         idx = le32_to_cpu(rx_complete->msg.request_id);
1139
1140         skb = brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
1141                                      msgbuf->rx_pktids, idx);
1142         if (!skb)
1143                 return;
1144
1145         if (data_offset)
1146                 skb_pull(skb, data_offset);
1147         else if (msgbuf->rx_dataoffset)
1148                 skb_pull(skb, msgbuf->rx_dataoffset);
1149
1150         skb_trim(skb, buflen);
1151
1152         brcmf_msgbuf_rx_skb(msgbuf, skb, rx_complete->msg.ifidx);
1153 }
1154
1155
1156 static void
1157 brcmf_msgbuf_process_flow_ring_create_response(struct brcmf_msgbuf *msgbuf,
1158                                                void *buf)
1159 {
1160         struct msgbuf_flowring_create_resp *flowring_create_resp;
1161         u16 status;
1162         u16 flowid;
1163
1164         flowring_create_resp = (struct msgbuf_flowring_create_resp *)buf;
1165
1166         flowid = le16_to_cpu(flowring_create_resp->compl_hdr.flow_ring_id);
1167         flowid -= BRCMF_NROF_H2D_COMMON_MSGRINGS;
1168         status =  le16_to_cpu(flowring_create_resp->compl_hdr.status);
1169
1170         if (status) {
1171                 brcmf_err("Flowring creation failed, code %d\n", status);
1172                 brcmf_msgbuf_remove_flowring(msgbuf, flowid);
1173                 return;
1174         }
1175         brcmf_dbg(MSGBUF, "Flowring %d Create response status %d\n", flowid,
1176                   status);
1177
1178         brcmf_flowring_open(msgbuf->flow, flowid);
1179
1180         brcmf_msgbuf_schedule_txdata(msgbuf, flowid, true);
1181 }
1182
1183
1184 static void
1185 brcmf_msgbuf_process_flow_ring_delete_response(struct brcmf_msgbuf *msgbuf,
1186                                                void *buf)
1187 {
1188         struct msgbuf_flowring_delete_resp *flowring_delete_resp;
1189         u16 status;
1190         u16 flowid;
1191
1192         flowring_delete_resp = (struct msgbuf_flowring_delete_resp *)buf;
1193
1194         flowid = le16_to_cpu(flowring_delete_resp->compl_hdr.flow_ring_id);
1195         flowid -= BRCMF_NROF_H2D_COMMON_MSGRINGS;
1196         status =  le16_to_cpu(flowring_delete_resp->compl_hdr.status);
1197
1198         if (status) {
1199                 brcmf_err("Flowring deletion failed, code %d\n", status);
1200                 brcmf_flowring_delete(msgbuf->flow, flowid);
1201                 return;
1202         }
1203         brcmf_dbg(MSGBUF, "Flowring %d Delete response status %d\n", flowid,
1204                   status);
1205
1206         brcmf_msgbuf_remove_flowring(msgbuf, flowid);
1207 }
1208
1209
1210 static void brcmf_msgbuf_process_msgtype(struct brcmf_msgbuf *msgbuf, void *buf)
1211 {
1212         struct msgbuf_common_hdr *msg;
1213
1214         msg = (struct msgbuf_common_hdr *)buf;
1215         switch (msg->msgtype) {
1216         case MSGBUF_TYPE_FLOW_RING_CREATE_CMPLT:
1217                 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_FLOW_RING_CREATE_CMPLT\n");
1218                 brcmf_msgbuf_process_flow_ring_create_response(msgbuf, buf);
1219                 break;
1220         case MSGBUF_TYPE_FLOW_RING_DELETE_CMPLT:
1221                 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_FLOW_RING_DELETE_CMPLT\n");
1222                 brcmf_msgbuf_process_flow_ring_delete_response(msgbuf, buf);
1223                 break;
1224         case MSGBUF_TYPE_IOCTLPTR_REQ_ACK:
1225                 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_IOCTLPTR_REQ_ACK\n");
1226                 break;
1227         case MSGBUF_TYPE_IOCTL_CMPLT:
1228                 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_IOCTL_CMPLT\n");
1229                 brcmf_msgbuf_process_ioctl_complete(msgbuf, buf);
1230                 break;
1231         case MSGBUF_TYPE_WL_EVENT:
1232                 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_WL_EVENT\n");
1233                 brcmf_msgbuf_process_event(msgbuf, buf);
1234                 break;
1235         case MSGBUF_TYPE_TX_STATUS:
1236                 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_TX_STATUS\n");
1237                 brcmf_msgbuf_process_txstatus(msgbuf, buf);
1238                 break;
1239         case MSGBUF_TYPE_RX_CMPLT:
1240                 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_RX_CMPLT\n");
1241                 brcmf_msgbuf_process_rx_complete(msgbuf, buf);
1242                 break;
1243         default:
1244                 brcmf_err("Unsupported msgtype %d\n", msg->msgtype);
1245                 break;
1246         }
1247 }
1248
1249
1250 static void brcmf_msgbuf_process_rx(struct brcmf_msgbuf *msgbuf,
1251                                     struct brcmf_commonring *commonring)
1252 {
1253         void *buf;
1254         u16 count;
1255         u16 processed;
1256
1257 again:
1258         buf = brcmf_commonring_get_read_ptr(commonring, &count);
1259         if (buf == NULL)
1260                 return;
1261
1262         processed = 0;
1263         while (count) {
1264                 brcmf_msgbuf_process_msgtype(msgbuf,
1265                                              buf + msgbuf->rx_dataoffset);
1266                 buf += brcmf_commonring_len_item(commonring);
1267                 processed++;
1268                 if (processed == BRCMF_MSGBUF_UPDATE_RX_PTR_THRS) {
1269                         brcmf_commonring_read_complete(commonring, processed);
1270                         processed = 0;
1271                 }
1272                 count--;
1273         }
1274         if (processed)
1275                 brcmf_commonring_read_complete(commonring, processed);
1276
1277         if (commonring->r_ptr == 0)
1278                 goto again;
1279 }
1280
1281
1282 int brcmf_proto_msgbuf_rx_trigger(struct device *dev)
1283 {
1284         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1285         struct brcmf_pub *drvr = bus_if->drvr;
1286         struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
1287         struct brcmf_commonring *commonring;
1288         void *buf;
1289         u32 flowid;
1290         int qlen;
1291
1292         buf = msgbuf->commonrings[BRCMF_D2H_MSGRING_RX_COMPLETE];
1293         brcmf_msgbuf_process_rx(msgbuf, buf);
1294         buf = msgbuf->commonrings[BRCMF_D2H_MSGRING_TX_COMPLETE];
1295         brcmf_msgbuf_process_rx(msgbuf, buf);
1296         buf = msgbuf->commonrings[BRCMF_D2H_MSGRING_CONTROL_COMPLETE];
1297         brcmf_msgbuf_process_rx(msgbuf, buf);
1298
1299         for_each_set_bit(flowid, msgbuf->txstatus_done_map,
1300                          msgbuf->nrof_flowrings) {
1301                 clear_bit(flowid, msgbuf->txstatus_done_map);
1302                 commonring = msgbuf->flowrings[flowid];
1303                 qlen = brcmf_flowring_qlen(msgbuf->flow, flowid);
1304                 if ((qlen > BRCMF_MSGBUF_TRICKLE_TXWORKER_THRS) ||
1305                     ((qlen) && (atomic_read(&commonring->outstanding_tx) <
1306                                 BRCMF_MSGBUF_TRICKLE_TXWORKER_THRS)))
1307                         brcmf_msgbuf_schedule_txdata(msgbuf, flowid, true);
1308         }
1309
1310         return 0;
1311 }
1312
1313
1314 void brcmf_msgbuf_delete_flowring(struct brcmf_pub *drvr, u8 flowid)
1315 {
1316         struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
1317         struct msgbuf_tx_flowring_delete_req *delete;
1318         struct brcmf_commonring *commonring;
1319         void *ret_ptr;
1320         u8 ifidx;
1321         int err;
1322
1323         commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
1324         brcmf_commonring_lock(commonring);
1325         ret_ptr = brcmf_commonring_reserve_for_write(commonring);
1326         if (!ret_ptr) {
1327                 brcmf_err("FW unaware, flowring will be removed !!\n");
1328                 brcmf_commonring_unlock(commonring);
1329                 brcmf_msgbuf_remove_flowring(msgbuf, flowid);
1330                 return;
1331         }
1332
1333         delete = (struct msgbuf_tx_flowring_delete_req *)ret_ptr;
1334
1335         ifidx = brcmf_flowring_ifidx_get(msgbuf->flow, flowid);
1336
1337         delete->msg.msgtype = MSGBUF_TYPE_FLOW_RING_DELETE;
1338         delete->msg.ifidx = ifidx;
1339         delete->msg.request_id = 0;
1340
1341         delete->flow_ring_id = cpu_to_le16(flowid +
1342                                            BRCMF_NROF_H2D_COMMON_MSGRINGS);
1343         delete->reason = 0;
1344
1345         brcmf_dbg(MSGBUF, "Send Flow Delete Req flow ID %d, ifindex %d\n",
1346                   flowid, ifidx);
1347
1348         err = brcmf_commonring_write_complete(commonring);
1349         brcmf_commonring_unlock(commonring);
1350         if (err) {
1351                 brcmf_err("Failed to submit RING_DELETE, flowring will be removed\n");
1352                 brcmf_msgbuf_remove_flowring(msgbuf, flowid);
1353         }
1354 }
1355
1356 #ifdef DEBUG
1357 static int brcmf_msgbuf_stats_read(struct seq_file *seq, void *data)
1358 {
1359         struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
1360         struct brcmf_pub *drvr = bus_if->drvr;
1361         struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
1362         struct brcmf_commonring *commonring;
1363         u16 i;
1364         struct brcmf_flowring_ring *ring;
1365         struct brcmf_flowring_hash *hash;
1366
1367         commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
1368         seq_printf(seq, "h2d_ctl_submit: rp %4u, wp %4u, depth %4u\n",
1369                    commonring->r_ptr, commonring->w_ptr, commonring->depth);
1370         commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_RXPOST_SUBMIT];
1371         seq_printf(seq, "h2d_rx_submit:  rp %4u, wp %4u, depth %4u\n",
1372                    commonring->r_ptr, commonring->w_ptr, commonring->depth);
1373         commonring = msgbuf->commonrings[BRCMF_D2H_MSGRING_CONTROL_COMPLETE];
1374         seq_printf(seq, "d2h_ctl_cmplt:  rp %4u, wp %4u, depth %4u\n",
1375                    commonring->r_ptr, commonring->w_ptr, commonring->depth);
1376         commonring = msgbuf->commonrings[BRCMF_D2H_MSGRING_TX_COMPLETE];
1377         seq_printf(seq, "d2h_tx_cmplt:   rp %4u, wp %4u, depth %4u\n",
1378                    commonring->r_ptr, commonring->w_ptr, commonring->depth);
1379         commonring = msgbuf->commonrings[BRCMF_D2H_MSGRING_RX_COMPLETE];
1380         seq_printf(seq, "d2h_rx_cmplt:   rp %4u, wp %4u, depth %4u\n",
1381                    commonring->r_ptr, commonring->w_ptr, commonring->depth);
1382
1383         seq_printf(seq, "\nh2d_flowrings: depth %u\n",
1384                    BRCMF_H2D_TXFLOWRING_MAX_ITEM);
1385         seq_puts(seq, "Active flowrings:\n");
1386         hash = msgbuf->flow->hash;
1387         for (i = 0; i < msgbuf->flow->nrofrings; i++) {
1388                 if (!msgbuf->flow->rings[i])
1389                         continue;
1390                 ring = msgbuf->flow->rings[i];
1391                 if (ring->status != RING_OPEN)
1392                         continue;
1393                 commonring = msgbuf->flowrings[i];
1394                 hash = &msgbuf->flow->hash[ring->hash_id];
1395                 seq_printf(seq, "id %3u: rp %4u, wp %4u, qlen %4u, blocked %u\n"
1396                                 "        ifidx %u, fifo %u, da %pM\n",
1397                                 i, commonring->r_ptr, commonring->w_ptr,
1398                                 skb_queue_len(&ring->skblist), ring->blocked,
1399                                 hash->ifidx, hash->fifo, hash->mac);
1400         }
1401
1402         return 0;
1403 }
1404 #else
1405 static int brcmf_msgbuf_stats_read(struct seq_file *seq, void *data)
1406 {
1407         return 0;
1408 }
1409 #endif
1410
1411 int brcmf_proto_msgbuf_attach(struct brcmf_pub *drvr)
1412 {
1413         struct brcmf_bus_msgbuf *if_msgbuf;
1414         struct brcmf_msgbuf *msgbuf;
1415         u64 address;
1416         u32 count;
1417
1418         if_msgbuf = drvr->bus_if->msgbuf;
1419         msgbuf = kzalloc(sizeof(*msgbuf), GFP_KERNEL);
1420         if (!msgbuf)
1421                 goto fail;
1422
1423         msgbuf->txflow_wq = create_singlethread_workqueue("msgbuf_txflow");
1424         if (msgbuf->txflow_wq == NULL) {
1425                 brcmf_err("workqueue creation failed\n");
1426                 goto fail;
1427         }
1428         INIT_WORK(&msgbuf->txflow_work, brcmf_msgbuf_txflow_worker);
1429         count = BITS_TO_LONGS(if_msgbuf->nrof_flowrings);
1430         count = count * sizeof(unsigned long);
1431         msgbuf->flow_map = kzalloc(count, GFP_KERNEL);
1432         if (!msgbuf->flow_map)
1433                 goto fail;
1434
1435         msgbuf->txstatus_done_map = kzalloc(count, GFP_KERNEL);
1436         if (!msgbuf->txstatus_done_map)
1437                 goto fail;
1438
1439         msgbuf->drvr = drvr;
1440         msgbuf->ioctbuf = dma_alloc_coherent(drvr->bus_if->dev,
1441                                              BRCMF_TX_IOCTL_MAX_MSG_SIZE,
1442                                              &msgbuf->ioctbuf_handle,
1443                                              GFP_KERNEL);
1444         if (!msgbuf->ioctbuf)
1445                 goto fail;
1446         address = (u64)msgbuf->ioctbuf_handle;
1447         msgbuf->ioctbuf_phys_hi = address >> 32;
1448         msgbuf->ioctbuf_phys_lo = address & 0xffffffff;
1449
1450         drvr->proto->hdrpull = brcmf_msgbuf_hdrpull;
1451         drvr->proto->query_dcmd = brcmf_msgbuf_query_dcmd;
1452         drvr->proto->set_dcmd = brcmf_msgbuf_set_dcmd;
1453         drvr->proto->txdata = brcmf_msgbuf_txdata;
1454         drvr->proto->configure_addr_mode = brcmf_msgbuf_configure_addr_mode;
1455         drvr->proto->delete_peer = brcmf_msgbuf_delete_peer;
1456         drvr->proto->add_tdls_peer = brcmf_msgbuf_add_tdls_peer;
1457         drvr->proto->pd = msgbuf;
1458
1459         init_waitqueue_head(&msgbuf->ioctl_resp_wait);
1460
1461         msgbuf->commonrings =
1462                 (struct brcmf_commonring **)if_msgbuf->commonrings;
1463         msgbuf->flowrings = (struct brcmf_commonring **)if_msgbuf->flowrings;
1464         msgbuf->nrof_flowrings = if_msgbuf->nrof_flowrings;
1465         msgbuf->flowring_dma_handle = kzalloc(msgbuf->nrof_flowrings *
1466                 sizeof(*msgbuf->flowring_dma_handle), GFP_KERNEL);
1467         if (!msgbuf->flowring_dma_handle)
1468                 goto fail;
1469
1470         msgbuf->rx_dataoffset = if_msgbuf->rx_dataoffset;
1471         msgbuf->max_rxbufpost = if_msgbuf->max_rxbufpost;
1472
1473         msgbuf->max_ioctlrespbuf = BRCMF_MSGBUF_MAX_IOCTLRESPBUF_POST;
1474         msgbuf->max_eventbuf = BRCMF_MSGBUF_MAX_EVENTBUF_POST;
1475
1476         msgbuf->tx_pktids = brcmf_msgbuf_init_pktids(NR_TX_PKTIDS,
1477                                                      DMA_TO_DEVICE);
1478         if (!msgbuf->tx_pktids)
1479                 goto fail;
1480         msgbuf->rx_pktids = brcmf_msgbuf_init_pktids(NR_RX_PKTIDS,
1481                                                      DMA_FROM_DEVICE);
1482         if (!msgbuf->rx_pktids)
1483                 goto fail;
1484
1485         msgbuf->flow = brcmf_flowring_attach(drvr->bus_if->dev,
1486                                              if_msgbuf->nrof_flowrings);
1487         if (!msgbuf->flow)
1488                 goto fail;
1489
1490
1491         brcmf_dbg(MSGBUF, "Feeding buffers, rx data %d, rx event %d, rx ioctl resp %d\n",
1492                   msgbuf->max_rxbufpost, msgbuf->max_eventbuf,
1493                   msgbuf->max_ioctlrespbuf);
1494         count = 0;
1495         do {
1496                 brcmf_msgbuf_rxbuf_data_fill(msgbuf);
1497                 if (msgbuf->max_rxbufpost != msgbuf->rxbufpost)
1498                         msleep(10);
1499                 else
1500                         break;
1501                 count++;
1502         } while (count < 10);
1503         brcmf_msgbuf_rxbuf_event_post(msgbuf);
1504         brcmf_msgbuf_rxbuf_ioctlresp_post(msgbuf);
1505
1506         INIT_WORK(&msgbuf->flowring_work, brcmf_msgbuf_flowring_worker);
1507         spin_lock_init(&msgbuf->flowring_work_lock);
1508         INIT_LIST_HEAD(&msgbuf->work_queue);
1509
1510         brcmf_debugfs_add_entry(drvr, "msgbuf_stats", brcmf_msgbuf_stats_read);
1511
1512         return 0;
1513
1514 fail:
1515         if (msgbuf) {
1516                 kfree(msgbuf->flow_map);
1517                 kfree(msgbuf->txstatus_done_map);
1518                 brcmf_msgbuf_release_pktids(msgbuf);
1519                 kfree(msgbuf->flowring_dma_handle);
1520                 if (msgbuf->ioctbuf)
1521                         dma_free_coherent(drvr->bus_if->dev,
1522                                           BRCMF_TX_IOCTL_MAX_MSG_SIZE,
1523                                           msgbuf->ioctbuf,
1524                                           msgbuf->ioctbuf_handle);
1525                 kfree(msgbuf);
1526         }
1527         return -ENOMEM;
1528 }
1529
1530
1531 void brcmf_proto_msgbuf_detach(struct brcmf_pub *drvr)
1532 {
1533         struct brcmf_msgbuf *msgbuf;
1534         struct brcmf_msgbuf_work_item *work;
1535
1536         brcmf_dbg(TRACE, "Enter\n");
1537         if (drvr->proto->pd) {
1538                 msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
1539                 cancel_work_sync(&msgbuf->flowring_work);
1540                 while (!list_empty(&msgbuf->work_queue)) {
1541                         work = list_first_entry(&msgbuf->work_queue,
1542                                                 struct brcmf_msgbuf_work_item,
1543                                                 queue);
1544                         list_del(&work->queue);
1545                         kfree(work);
1546                 }
1547                 kfree(msgbuf->flow_map);
1548                 kfree(msgbuf->txstatus_done_map);
1549                 if (msgbuf->txflow_wq)
1550                         destroy_workqueue(msgbuf->txflow_wq);
1551
1552                 brcmf_flowring_detach(msgbuf->flow);
1553                 dma_free_coherent(drvr->bus_if->dev,
1554                                   BRCMF_TX_IOCTL_MAX_MSG_SIZE,
1555                                   msgbuf->ioctbuf, msgbuf->ioctbuf_handle);
1556                 brcmf_msgbuf_release_pktids(msgbuf);
1557                 kfree(msgbuf->flowring_dma_handle);
1558                 kfree(msgbuf);
1559                 drvr->proto->pd = NULL;
1560         }
1561 }