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