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 64
77 #define BRCMF_MSGBUF_TRICKLE_TXWORKER_THRS 32
78
79 struct msgbuf_common_hdr {
80 u8 msgtype;
81 u8 ifidx;
82 u8 flags;
83 u8 rsvd0;
84 __le32 request_id;
85 };
86
87 struct msgbuf_buf_addr {
88 __le32 low_addr;
89 __le32 high_addr;
90 };
91
92 struct msgbuf_ioctl_req_hdr {
93 struct msgbuf_common_hdr msg;
94 __le32 cmd;
95 __le16 trans_id;
96 __le16 input_buf_len;
97 __le16 output_buf_len;
98 __le16 rsvd0[3];
99 struct msgbuf_buf_addr req_buf_addr;
100 __le32 rsvd1[2];
101 };
102
103 struct msgbuf_tx_msghdr {
104 struct msgbuf_common_hdr msg;
105 u8 txhdr[ETH_HLEN];
106 u8 flags;
107 u8 seg_cnt;
108 struct msgbuf_buf_addr metadata_buf_addr;
109 struct msgbuf_buf_addr data_buf_addr;
110 __le16 metadata_buf_len;
111 __le16 data_len;
112 __le32 rsvd0;
113 };
114
115 struct msgbuf_rx_bufpost {
116 struct msgbuf_common_hdr msg;
117 __le16 metadata_buf_len;
118 __le16 data_buf_len;
119 __le32 rsvd0;
120 struct msgbuf_buf_addr metadata_buf_addr;
121 struct msgbuf_buf_addr data_buf_addr;
122 };
123
124 struct msgbuf_rx_ioctl_resp_or_event {
125 struct msgbuf_common_hdr msg;
126 __le16 host_buf_len;
127 __le16 rsvd0[3];
128 struct msgbuf_buf_addr host_buf_addr;
129 __le32 rsvd1[4];
130 };
131
132 struct msgbuf_completion_hdr {
133 __le16 status;
134 __le16 flow_ring_id;
135 };
136
137 struct msgbuf_rx_event {
138 struct msgbuf_common_hdr msg;
139 struct msgbuf_completion_hdr compl_hdr;
140 __le16 event_data_len;
141 __le16 seqnum;
142 __le16 rsvd0[4];
143 };
144
145 struct msgbuf_ioctl_resp_hdr {
146 struct msgbuf_common_hdr msg;
147 struct msgbuf_completion_hdr compl_hdr;
148 __le16 resp_len;
149 __le16 trans_id;
150 __le32 cmd;
151 __le32 rsvd0;
152 };
153
154 struct msgbuf_tx_status {
155 struct msgbuf_common_hdr msg;
156 struct msgbuf_completion_hdr compl_hdr;
157 __le16 metadata_len;
158 __le16 tx_status;
159 };
160
161 struct msgbuf_rx_complete {
162 struct msgbuf_common_hdr msg;
163 struct msgbuf_completion_hdr compl_hdr;
164 __le16 metadata_len;
165 __le16 data_len;
166 __le16 data_offset;
167 __le16 flags;
168 __le32 rx_status_0;
169 __le32 rx_status_1;
170 __le32 rsvd0;
171 };
172
173 struct msgbuf_tx_flowring_create_req {
174 struct msgbuf_common_hdr msg;
175 u8 da[ETH_ALEN];
176 u8 sa[ETH_ALEN];
177 u8 tid;
178 u8 if_flags;
179 __le16 flow_ring_id;
180 u8 tc;
181 u8 priority;
182 __le16 int_vector;
183 __le16 max_items;
184 __le16 len_item;
185 struct msgbuf_buf_addr flow_ring_addr;
186 };
187
188 struct msgbuf_tx_flowring_delete_req {
189 struct msgbuf_common_hdr msg;
190 __le16 flow_ring_id;
191 __le16 reason;
192 __le32 rsvd0[7];
193 };
194
195 struct msgbuf_flowring_create_resp {
196 struct msgbuf_common_hdr msg;
197 struct msgbuf_completion_hdr compl_hdr;
198 __le32 rsvd0[3];
199 };
200
201 struct msgbuf_flowring_delete_resp {
202 struct msgbuf_common_hdr msg;
203 struct msgbuf_completion_hdr compl_hdr;
204 __le32 rsvd0[3];
205 };
206
207 struct msgbuf_flowring_flush_resp {
208 struct msgbuf_common_hdr msg;
209 struct msgbuf_completion_hdr compl_hdr;
210 __le32 rsvd0[3];
211 };
212
213 struct brcmf_msgbuf_work_item {
214 struct list_head queue;
215 u32 flowid;
216 int ifidx;
217 u8 sa[ETH_ALEN];
218 u8 da[ETH_ALEN];
219 };
220
221 struct brcmf_msgbuf {
222 struct brcmf_pub *drvr;
223
224 struct brcmf_commonring **commonrings;
225 struct brcmf_commonring **flowrings;
226 dma_addr_t *flowring_dma_handle;
227 u16 nrof_flowrings;
228
229 u16 rx_dataoffset;
230 u32 max_rxbufpost;
231 u16 rx_metadata_offset;
232 u32 rxbufpost;
233
234 u32 max_ioctlrespbuf;
235 u32 cur_ioctlrespbuf;
236 u32 max_eventbuf;
237 u32 cur_eventbuf;
238
239 void *ioctbuf;
240 dma_addr_t ioctbuf_handle;
241 u32 ioctbuf_phys_hi;
242 u32 ioctbuf_phys_lo;
243 int ioctl_resp_status;
244 u32 ioctl_resp_ret_len;
245 u32 ioctl_resp_pktid;
246
247 u16 data_seq_no;
248 u16 ioctl_seq_no;
249 u32 reqid;
250 wait_queue_head_t ioctl_resp_wait;
251 bool ctl_completed;
252
253 struct brcmf_msgbuf_pktids *tx_pktids;
254 struct brcmf_msgbuf_pktids *rx_pktids;
255 struct brcmf_flowring *flow;
256
257 struct workqueue_struct *txflow_wq;
258 struct work_struct txflow_work;
259 unsigned long *flow_map;
260 unsigned long *txstatus_done_map;
261
262 struct work_struct flowring_work;
263 spinlock_t flowring_work_lock;
264 struct list_head work_queue;
265 };
266
267 struct brcmf_msgbuf_pktid {
268 atomic_t allocated;
269 u16 data_offset;
270 struct sk_buff *skb;
271 dma_addr_t physaddr;
272 };
273
274 struct brcmf_msgbuf_pktids {
275 u32 array_size;
276 u32 last_allocated_idx;
277 enum dma_data_direction direction;
278 struct brcmf_msgbuf_pktid *array;
279 };
280
281
282 /* dma flushing needs implementation for mips and arm platforms. Should
283 * be put in util. Note, this is not real flushing. It is virtual non
284 * cached memory. Only write buffers should have to be drained. Though
285 * this may be different depending on platform......
286 */
287 #define brcmf_dma_flush(addr, len)
288 #define brcmf_dma_invalidate_cache(addr, len)
289
290
291 static void brcmf_msgbuf_rxbuf_ioctlresp_post(struct brcmf_msgbuf *msgbuf);
292
293
294 static struct brcmf_msgbuf_pktids *
brcmf_msgbuf_init_pktids(u32 nr_array_entries,enum dma_data_direction direction)295 brcmf_msgbuf_init_pktids(u32 nr_array_entries,
296 enum dma_data_direction direction)
297 {
298 struct brcmf_msgbuf_pktid *array;
299 struct brcmf_msgbuf_pktids *pktids;
300
301 array = kcalloc(nr_array_entries, sizeof(*array), GFP_KERNEL);
302 if (!array)
303 return NULL;
304
305 pktids = kzalloc(sizeof(*pktids), GFP_KERNEL);
306 if (!pktids) {
307 kfree(array);
308 return NULL;
309 }
310 pktids->array = array;
311 pktids->array_size = nr_array_entries;
312
313 return pktids;
314 }
315
316
317 static int
brcmf_msgbuf_alloc_pktid(struct device * dev,struct brcmf_msgbuf_pktids * pktids,struct sk_buff * skb,u16 data_offset,dma_addr_t * physaddr,u32 * idx)318 brcmf_msgbuf_alloc_pktid(struct device *dev,
319 struct brcmf_msgbuf_pktids *pktids,
320 struct sk_buff *skb, u16 data_offset,
321 dma_addr_t *physaddr, u32 *idx)
322 {
323 struct brcmf_msgbuf_pktid *array;
324 u32 count;
325
326 array = pktids->array;
327
328 *physaddr = dma_map_single(dev, skb->data + data_offset,
329 skb->len - data_offset, pktids->direction);
330
331 if (dma_mapping_error(dev, *physaddr)) {
332 brcmf_err("dma_map_single failed !!\n");
333 return -ENOMEM;
334 }
335
336 *idx = pktids->last_allocated_idx;
337
338 count = 0;
339 do {
340 (*idx)++;
341 if (*idx == pktids->array_size)
342 *idx = 0;
343 if (array[*idx].allocated.counter == 0)
344 if (atomic_cmpxchg(&array[*idx].allocated, 0, 1) == 0)
345 break;
346 count++;
347 } while (count < pktids->array_size);
348
349 if (count == pktids->array_size)
350 return -ENOMEM;
351
352 array[*idx].data_offset = data_offset;
353 array[*idx].physaddr = *physaddr;
354 array[*idx].skb = skb;
355
356 pktids->last_allocated_idx = *idx;
357
358 return 0;
359 }
360
361
362 static struct sk_buff *
brcmf_msgbuf_get_pktid(struct device * dev,struct brcmf_msgbuf_pktids * pktids,u32 idx)363 brcmf_msgbuf_get_pktid(struct device *dev, struct brcmf_msgbuf_pktids *pktids,
364 u32 idx)
365 {
366 struct brcmf_msgbuf_pktid *pktid;
367 struct sk_buff *skb;
368
369 if (idx >= pktids->array_size) {
370 brcmf_err("Invalid packet id %d (max %d)\n", idx,
371 pktids->array_size);
372 return NULL;
373 }
374 if (pktids->array[idx].allocated.counter) {
375 pktid = &pktids->array[idx];
376 dma_unmap_single(dev, pktid->physaddr,
377 pktid->skb->len - pktid->data_offset,
378 pktids->direction);
379 skb = pktid->skb;
380 pktid->allocated.counter = 0;
381 return skb;
382 } else {
383 brcmf_err("Invalid packet id %d (not in use)\n", idx);
384 }
385
386 return NULL;
387 }
388
389
390 static void
brcmf_msgbuf_release_array(struct device * dev,struct brcmf_msgbuf_pktids * pktids)391 brcmf_msgbuf_release_array(struct device *dev,
392 struct brcmf_msgbuf_pktids *pktids)
393 {
394 struct brcmf_msgbuf_pktid *array;
395 struct brcmf_msgbuf_pktid *pktid;
396 u32 count;
397
398 array = pktids->array;
399 count = 0;
400 do {
401 if (array[count].allocated.counter) {
402 pktid = &array[count];
403 dma_unmap_single(dev, pktid->physaddr,
404 pktid->skb->len - pktid->data_offset,
405 pktids->direction);
406 brcmu_pkt_buf_free_skb(pktid->skb);
407 }
408 count++;
409 } while (count < pktids->array_size);
410
411 kfree(array);
412 kfree(pktids);
413 }
414
415
brcmf_msgbuf_release_pktids(struct brcmf_msgbuf * msgbuf)416 static void brcmf_msgbuf_release_pktids(struct brcmf_msgbuf *msgbuf)
417 {
418 if (msgbuf->rx_pktids)
419 brcmf_msgbuf_release_array(msgbuf->drvr->bus_if->dev,
420 msgbuf->rx_pktids);
421 if (msgbuf->tx_pktids)
422 brcmf_msgbuf_release_array(msgbuf->drvr->bus_if->dev,
423 msgbuf->tx_pktids);
424 }
425
426
brcmf_msgbuf_tx_ioctl(struct brcmf_pub * drvr,int ifidx,uint cmd,void * buf,uint len)427 static int brcmf_msgbuf_tx_ioctl(struct brcmf_pub *drvr, int ifidx,
428 uint cmd, void *buf, uint len)
429 {
430 struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
431 struct brcmf_commonring *commonring;
432 struct msgbuf_ioctl_req_hdr *request;
433 u16 buf_len;
434 void *ret_ptr;
435 int err;
436
437 commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
438 brcmf_commonring_lock(commonring);
439 ret_ptr = brcmf_commonring_reserve_for_write(commonring);
440 if (!ret_ptr) {
441 brcmf_err("Failed to reserve space in commonring\n");
442 brcmf_commonring_unlock(commonring);
443 return -ENOMEM;
444 }
445
446 msgbuf->reqid++;
447
448 request = (struct msgbuf_ioctl_req_hdr *)ret_ptr;
449 request->msg.msgtype = MSGBUF_TYPE_IOCTLPTR_REQ;
450 request->msg.ifidx = (u8)ifidx;
451 request->msg.flags = 0;
452 request->msg.request_id = cpu_to_le32(BRCMF_IOCTL_REQ_PKTID);
453 request->cmd = cpu_to_le32(cmd);
454 request->output_buf_len = cpu_to_le16(len);
455 request->trans_id = cpu_to_le16(msgbuf->reqid);
456
457 buf_len = min_t(u16, len, BRCMF_TX_IOCTL_MAX_MSG_SIZE);
458 request->input_buf_len = cpu_to_le16(buf_len);
459 request->req_buf_addr.high_addr = cpu_to_le32(msgbuf->ioctbuf_phys_hi);
460 request->req_buf_addr.low_addr = cpu_to_le32(msgbuf->ioctbuf_phys_lo);
461 if (buf)
462 memcpy(msgbuf->ioctbuf, buf, buf_len);
463 else
464 memset(msgbuf->ioctbuf, 0, buf_len);
465 brcmf_dma_flush(ioctl_buf, buf_len);
466
467 err = brcmf_commonring_write_complete(commonring);
468 brcmf_commonring_unlock(commonring);
469
470 return err;
471 }
472
473
brcmf_msgbuf_ioctl_resp_wait(struct brcmf_msgbuf * msgbuf)474 static int brcmf_msgbuf_ioctl_resp_wait(struct brcmf_msgbuf *msgbuf)
475 {
476 return wait_event_timeout(msgbuf->ioctl_resp_wait,
477 msgbuf->ctl_completed,
478 msecs_to_jiffies(MSGBUF_IOCTL_RESP_TIMEOUT));
479 }
480
481
brcmf_msgbuf_ioctl_resp_wake(struct brcmf_msgbuf * msgbuf)482 static void brcmf_msgbuf_ioctl_resp_wake(struct brcmf_msgbuf *msgbuf)
483 {
484 msgbuf->ctl_completed = true;
485 if (waitqueue_active(&msgbuf->ioctl_resp_wait))
486 wake_up(&msgbuf->ioctl_resp_wait);
487 }
488
489
brcmf_msgbuf_query_dcmd(struct brcmf_pub * drvr,int ifidx,uint cmd,void * buf,uint len)490 static int brcmf_msgbuf_query_dcmd(struct brcmf_pub *drvr, int ifidx,
491 uint cmd, void *buf, uint len)
492 {
493 struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
494 struct sk_buff *skb = NULL;
495 int timeout;
496 int err;
497
498 brcmf_dbg(MSGBUF, "ifidx=%d, cmd=%d, len=%d\n", ifidx, cmd, len);
499 msgbuf->ctl_completed = false;
500 err = brcmf_msgbuf_tx_ioctl(drvr, ifidx, cmd, buf, len);
501 if (err)
502 return err;
503
504 timeout = brcmf_msgbuf_ioctl_resp_wait(msgbuf);
505 if (!timeout) {
506 brcmf_err("Timeout on response for query command\n");
507 return -EIO;
508 }
509
510 skb = brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
511 msgbuf->rx_pktids,
512 msgbuf->ioctl_resp_pktid);
513 if (msgbuf->ioctl_resp_ret_len != 0) {
514 if (!skb)
515 return -EBADF;
516
517 memcpy(buf, skb->data, (len < msgbuf->ioctl_resp_ret_len) ?
518 len : msgbuf->ioctl_resp_ret_len);
519 }
520 brcmu_pkt_buf_free_skb(skb);
521
522 return msgbuf->ioctl_resp_status;
523 }
524
525
brcmf_msgbuf_set_dcmd(struct brcmf_pub * drvr,int ifidx,uint cmd,void * buf,uint len)526 static int brcmf_msgbuf_set_dcmd(struct brcmf_pub *drvr, int ifidx,
527 uint cmd, void *buf, uint len)
528 {
529 return brcmf_msgbuf_query_dcmd(drvr, ifidx, cmd, buf, len);
530 }
531
532
brcmf_msgbuf_hdrpull(struct brcmf_pub * drvr,bool do_fws,u8 * ifidx,struct sk_buff * skb)533 static int brcmf_msgbuf_hdrpull(struct brcmf_pub *drvr, bool do_fws,
534 u8 *ifidx, struct sk_buff *skb)
535 {
536 return -ENODEV;
537 }
538
539
540 static void
brcmf_msgbuf_remove_flowring(struct brcmf_msgbuf * msgbuf,u16 flowid)541 brcmf_msgbuf_remove_flowring(struct brcmf_msgbuf *msgbuf, u16 flowid)
542 {
543 u32 dma_sz;
544 void *dma_buf;
545
546 brcmf_dbg(MSGBUF, "Removing flowring %d\n", flowid);
547
548 dma_sz = BRCMF_H2D_TXFLOWRING_MAX_ITEM * BRCMF_H2D_TXFLOWRING_ITEMSIZE;
549 dma_buf = msgbuf->flowrings[flowid]->buf_addr;
550 dma_free_coherent(msgbuf->drvr->bus_if->dev, dma_sz, dma_buf,
551 msgbuf->flowring_dma_handle[flowid]);
552
553 brcmf_flowring_delete(msgbuf->flow, flowid);
554 }
555
556
557 static struct brcmf_msgbuf_work_item *
brcmf_msgbuf_dequeue_work(struct brcmf_msgbuf * msgbuf)558 brcmf_msgbuf_dequeue_work(struct brcmf_msgbuf *msgbuf)
559 {
560 struct brcmf_msgbuf_work_item *work = NULL;
561 ulong flags;
562
563 spin_lock_irqsave(&msgbuf->flowring_work_lock, flags);
564 if (!list_empty(&msgbuf->work_queue)) {
565 work = list_first_entry(&msgbuf->work_queue,
566 struct brcmf_msgbuf_work_item, queue);
567 list_del(&work->queue);
568 }
569 spin_unlock_irqrestore(&msgbuf->flowring_work_lock, flags);
570
571 return work;
572 }
573
574
575 static u32
brcmf_msgbuf_flowring_create_worker(struct brcmf_msgbuf * msgbuf,struct brcmf_msgbuf_work_item * work)576 brcmf_msgbuf_flowring_create_worker(struct brcmf_msgbuf *msgbuf,
577 struct brcmf_msgbuf_work_item *work)
578 {
579 struct msgbuf_tx_flowring_create_req *create;
580 struct brcmf_commonring *commonring;
581 void *ret_ptr;
582 u32 flowid;
583 void *dma_buf;
584 u32 dma_sz;
585 u64 address;
586 int err;
587
588 flowid = work->flowid;
589 dma_sz = BRCMF_H2D_TXFLOWRING_MAX_ITEM * BRCMF_H2D_TXFLOWRING_ITEMSIZE;
590 dma_buf = dma_alloc_coherent(msgbuf->drvr->bus_if->dev, dma_sz,
591 &msgbuf->flowring_dma_handle[flowid],
592 GFP_KERNEL);
593 if (!dma_buf) {
594 brcmf_err("dma_alloc_coherent failed\n");
595 brcmf_flowring_delete(msgbuf->flow, flowid);
596 return BRCMF_FLOWRING_INVALID_ID;
597 }
598
599 brcmf_commonring_config(msgbuf->flowrings[flowid],
600 BRCMF_H2D_TXFLOWRING_MAX_ITEM,
601 BRCMF_H2D_TXFLOWRING_ITEMSIZE, dma_buf);
602
603 commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
604 brcmf_commonring_lock(commonring);
605 ret_ptr = brcmf_commonring_reserve_for_write(commonring);
606 if (!ret_ptr) {
607 brcmf_err("Failed to reserve space in commonring\n");
608 brcmf_commonring_unlock(commonring);
609 brcmf_msgbuf_remove_flowring(msgbuf, flowid);
610 return BRCMF_FLOWRING_INVALID_ID;
611 }
612
613 create = (struct msgbuf_tx_flowring_create_req *)ret_ptr;
614 create->msg.msgtype = MSGBUF_TYPE_FLOW_RING_CREATE;
615 create->msg.ifidx = work->ifidx;
616 create->msg.request_id = 0;
617 create->tid = brcmf_flowring_tid(msgbuf->flow, flowid);
618 create->flow_ring_id = cpu_to_le16(flowid +
619 BRCMF_NROF_H2D_COMMON_MSGRINGS);
620 memcpy(create->sa, work->sa, ETH_ALEN);
621 memcpy(create->da, work->da, ETH_ALEN);
622 address = (u64)msgbuf->flowring_dma_handle[flowid];
623 create->flow_ring_addr.high_addr = cpu_to_le32(address >> 32);
624 create->flow_ring_addr.low_addr = cpu_to_le32(address & 0xffffffff);
625 create->max_items = cpu_to_le16(BRCMF_H2D_TXFLOWRING_MAX_ITEM);
626 create->len_item = cpu_to_le16(BRCMF_H2D_TXFLOWRING_ITEMSIZE);
627
628 brcmf_dbg(MSGBUF, "Send Flow Create Req flow ID %d for peer %pM prio %d ifindex %d\n",
629 flowid, work->da, create->tid, work->ifidx);
630
631 err = brcmf_commonring_write_complete(commonring);
632 brcmf_commonring_unlock(commonring);
633 if (err) {
634 brcmf_err("Failed to write commonring\n");
635 brcmf_msgbuf_remove_flowring(msgbuf, flowid);
636 return BRCMF_FLOWRING_INVALID_ID;
637 }
638
639 return flowid;
640 }
641
642
brcmf_msgbuf_flowring_worker(struct work_struct * work)643 static void brcmf_msgbuf_flowring_worker(struct work_struct *work)
644 {
645 struct brcmf_msgbuf *msgbuf;
646 struct brcmf_msgbuf_work_item *create;
647
648 msgbuf = container_of(work, struct brcmf_msgbuf, flowring_work);
649
650 while ((create = brcmf_msgbuf_dequeue_work(msgbuf))) {
651 brcmf_msgbuf_flowring_create_worker(msgbuf, create);
652 kfree(create);
653 }
654 }
655
656
brcmf_msgbuf_flowring_create(struct brcmf_msgbuf * msgbuf,int ifidx,struct sk_buff * skb)657 static u32 brcmf_msgbuf_flowring_create(struct brcmf_msgbuf *msgbuf, int ifidx,
658 struct sk_buff *skb)
659 {
660 struct brcmf_msgbuf_work_item *create;
661 struct ethhdr *eh = (struct ethhdr *)(skb->data);
662 u32 flowid;
663 ulong flags;
664
665 create = kzalloc(sizeof(*create), GFP_ATOMIC);
666 if (create == NULL)
667 return BRCMF_FLOWRING_INVALID_ID;
668
669 flowid = brcmf_flowring_create(msgbuf->flow, eh->h_dest,
670 skb->priority, ifidx);
671 if (flowid == BRCMF_FLOWRING_INVALID_ID) {
672 kfree(create);
673 return flowid;
674 }
675
676 create->flowid = flowid;
677 create->ifidx = ifidx;
678 memcpy(create->sa, eh->h_source, ETH_ALEN);
679 memcpy(create->da, eh->h_dest, ETH_ALEN);
680
681 spin_lock_irqsave(&msgbuf->flowring_work_lock, flags);
682 list_add_tail(&create->queue, &msgbuf->work_queue);
683 spin_unlock_irqrestore(&msgbuf->flowring_work_lock, flags);
684 schedule_work(&msgbuf->flowring_work);
685
686 return flowid;
687 }
688
689
brcmf_msgbuf_txflow(struct brcmf_msgbuf * msgbuf,u8 flowid)690 static void brcmf_msgbuf_txflow(struct brcmf_msgbuf *msgbuf, u8 flowid)
691 {
692 struct brcmf_flowring *flow = msgbuf->flow;
693 struct brcmf_commonring *commonring;
694 void *ret_ptr;
695 u32 count;
696 struct sk_buff *skb;
697 dma_addr_t physaddr;
698 u32 pktid;
699 struct msgbuf_tx_msghdr *tx_msghdr;
700 u64 address;
701
702 commonring = msgbuf->flowrings[flowid];
703 if (!brcmf_commonring_write_available(commonring))
704 return;
705
706 brcmf_commonring_lock(commonring);
707
708 count = BRCMF_MSGBUF_TX_FLUSH_CNT2 - BRCMF_MSGBUF_TX_FLUSH_CNT1;
709 while (brcmf_flowring_qlen(flow, flowid)) {
710 skb = brcmf_flowring_dequeue(flow, flowid);
711 if (skb == NULL) {
712 brcmf_err("No SKB, but qlen %d\n",
713 brcmf_flowring_qlen(flow, flowid));
714 break;
715 }
716 skb_orphan(skb);
717 if (brcmf_msgbuf_alloc_pktid(msgbuf->drvr->bus_if->dev,
718 msgbuf->tx_pktids, skb, ETH_HLEN,
719 &physaddr, &pktid)) {
720 brcmf_flowring_reinsert(flow, flowid, skb);
721 brcmf_err("No PKTID available !!\n");
722 break;
723 }
724 ret_ptr = brcmf_commonring_reserve_for_write(commonring);
725 if (!ret_ptr) {
726 brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
727 msgbuf->tx_pktids, pktid);
728 brcmf_flowring_reinsert(flow, flowid, skb);
729 break;
730 }
731 count++;
732
733 tx_msghdr = (struct msgbuf_tx_msghdr *)ret_ptr;
734
735 tx_msghdr->msg.msgtype = MSGBUF_TYPE_TX_POST;
736 tx_msghdr->msg.request_id = cpu_to_le32(pktid);
737 tx_msghdr->msg.ifidx = brcmf_flowring_ifidx_get(flow, flowid);
738 tx_msghdr->flags = BRCMF_MSGBUF_PKT_FLAGS_FRAME_802_3;
739 tx_msghdr->flags |= (skb->priority & 0x07) <<
740 BRCMF_MSGBUF_PKT_FLAGS_PRIO_SHIFT;
741 tx_msghdr->seg_cnt = 1;
742 memcpy(tx_msghdr->txhdr, skb->data, ETH_HLEN);
743 tx_msghdr->data_len = cpu_to_le16(skb->len - ETH_HLEN);
744 address = (u64)physaddr;
745 tx_msghdr->data_buf_addr.high_addr = cpu_to_le32(address >> 32);
746 tx_msghdr->data_buf_addr.low_addr =
747 cpu_to_le32(address & 0xffffffff);
748 tx_msghdr->metadata_buf_len = 0;
749 tx_msghdr->metadata_buf_addr.high_addr = 0;
750 tx_msghdr->metadata_buf_addr.low_addr = 0;
751 atomic_inc(&commonring->outstanding_tx);
752 if (count >= BRCMF_MSGBUF_TX_FLUSH_CNT2) {
753 brcmf_commonring_write_complete(commonring);
754 count = 0;
755 }
756 }
757 if (count)
758 brcmf_commonring_write_complete(commonring);
759 brcmf_commonring_unlock(commonring);
760 }
761
762
brcmf_msgbuf_txflow_worker(struct work_struct * worker)763 static void brcmf_msgbuf_txflow_worker(struct work_struct *worker)
764 {
765 struct brcmf_msgbuf *msgbuf;
766 u32 flowid;
767
768 msgbuf = container_of(worker, struct brcmf_msgbuf, txflow_work);
769 for_each_set_bit(flowid, msgbuf->flow_map, msgbuf->nrof_flowrings) {
770 clear_bit(flowid, msgbuf->flow_map);
771 brcmf_msgbuf_txflow(msgbuf, flowid);
772 }
773 }
774
775
brcmf_msgbuf_schedule_txdata(struct brcmf_msgbuf * msgbuf,u32 flowid,bool force)776 static int brcmf_msgbuf_schedule_txdata(struct brcmf_msgbuf *msgbuf, u32 flowid,
777 bool force)
778 {
779 struct brcmf_commonring *commonring;
780
781 set_bit(flowid, msgbuf->flow_map);
782 commonring = msgbuf->flowrings[flowid];
783 if ((force) || (atomic_read(&commonring->outstanding_tx) <
784 BRCMF_MSGBUF_DELAY_TXWORKER_THRS))
785 queue_work(msgbuf->txflow_wq, &msgbuf->txflow_work);
786
787 return 0;
788 }
789
790
brcmf_msgbuf_txdata(struct brcmf_pub * drvr,int ifidx,u8 offset,struct sk_buff * skb)791 static int brcmf_msgbuf_txdata(struct brcmf_pub *drvr, int ifidx,
792 u8 offset, struct sk_buff *skb)
793 {
794 struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
795 struct brcmf_flowring *flow = msgbuf->flow;
796 struct ethhdr *eh = (struct ethhdr *)(skb->data);
797 u32 flowid;
798
799 flowid = brcmf_flowring_lookup(flow, eh->h_dest, skb->priority, ifidx);
800 if (flowid == BRCMF_FLOWRING_INVALID_ID) {
801 flowid = brcmf_msgbuf_flowring_create(msgbuf, ifidx, skb);
802 if (flowid == BRCMF_FLOWRING_INVALID_ID)
803 return -ENOMEM;
804 }
805 brcmf_flowring_enqueue(flow, flowid, skb);
806 brcmf_msgbuf_schedule_txdata(msgbuf, flowid, false);
807
808 return 0;
809 }
810
811
812 static void
brcmf_msgbuf_configure_addr_mode(struct brcmf_pub * drvr,int ifidx,enum proto_addr_mode addr_mode)813 brcmf_msgbuf_configure_addr_mode(struct brcmf_pub *drvr, int ifidx,
814 enum proto_addr_mode addr_mode)
815 {
816 struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
817
818 brcmf_flowring_configure_addr_mode(msgbuf->flow, ifidx, addr_mode);
819 }
820
821
822 static void
brcmf_msgbuf_delete_peer(struct brcmf_pub * drvr,int ifidx,u8 peer[ETH_ALEN])823 brcmf_msgbuf_delete_peer(struct brcmf_pub *drvr, int ifidx, u8 peer[ETH_ALEN])
824 {
825 struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
826
827 brcmf_flowring_delete_peer(msgbuf->flow, ifidx, peer);
828 }
829
830
831 static void
brcmf_msgbuf_add_tdls_peer(struct brcmf_pub * drvr,int ifidx,u8 peer[ETH_ALEN])832 brcmf_msgbuf_add_tdls_peer(struct brcmf_pub *drvr, int ifidx, u8 peer[ETH_ALEN])
833 {
834 struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
835
836 brcmf_flowring_add_tdls_peer(msgbuf->flow, ifidx, peer);
837 }
838
839
840 static void
brcmf_msgbuf_process_ioctl_complete(struct brcmf_msgbuf * msgbuf,void * buf)841 brcmf_msgbuf_process_ioctl_complete(struct brcmf_msgbuf *msgbuf, void *buf)
842 {
843 struct msgbuf_ioctl_resp_hdr *ioctl_resp;
844
845 ioctl_resp = (struct msgbuf_ioctl_resp_hdr *)buf;
846
847 msgbuf->ioctl_resp_status =
848 (s16)le16_to_cpu(ioctl_resp->compl_hdr.status);
849 msgbuf->ioctl_resp_ret_len = le16_to_cpu(ioctl_resp->resp_len);
850 msgbuf->ioctl_resp_pktid = le32_to_cpu(ioctl_resp->msg.request_id);
851
852 brcmf_msgbuf_ioctl_resp_wake(msgbuf);
853
854 if (msgbuf->cur_ioctlrespbuf)
855 msgbuf->cur_ioctlrespbuf--;
856 brcmf_msgbuf_rxbuf_ioctlresp_post(msgbuf);
857 }
858
859
860 static void
brcmf_msgbuf_process_txstatus(struct brcmf_msgbuf * msgbuf,void * buf)861 brcmf_msgbuf_process_txstatus(struct brcmf_msgbuf *msgbuf, void *buf)
862 {
863 struct brcmf_commonring *commonring;
864 struct msgbuf_tx_status *tx_status;
865 u32 idx;
866 struct sk_buff *skb;
867 u16 flowid;
868
869 tx_status = (struct msgbuf_tx_status *)buf;
870 idx = le32_to_cpu(tx_status->msg.request_id);
871 flowid = le16_to_cpu(tx_status->compl_hdr.flow_ring_id);
872 flowid -= BRCMF_NROF_H2D_COMMON_MSGRINGS;
873 skb = brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
874 msgbuf->tx_pktids, idx);
875 if (!skb)
876 return;
877
878 set_bit(flowid, msgbuf->txstatus_done_map);
879 commonring = msgbuf->flowrings[flowid];
880 atomic_dec(&commonring->outstanding_tx);
881
882 brcmf_txfinalize(msgbuf->drvr, skb, tx_status->msg.ifidx, true);
883 }
884
885
brcmf_msgbuf_rxbuf_data_post(struct brcmf_msgbuf * msgbuf,u32 count)886 static u32 brcmf_msgbuf_rxbuf_data_post(struct brcmf_msgbuf *msgbuf, u32 count)
887 {
888 struct brcmf_commonring *commonring;
889 void *ret_ptr;
890 struct sk_buff *skb;
891 u16 alloced;
892 u32 pktlen;
893 dma_addr_t physaddr;
894 struct msgbuf_rx_bufpost *rx_bufpost;
895 u64 address;
896 u32 pktid;
897 u32 i;
898
899 commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_RXPOST_SUBMIT];
900 ret_ptr = brcmf_commonring_reserve_for_write_multiple(commonring,
901 count,
902 &alloced);
903 if (!ret_ptr) {
904 brcmf_dbg(MSGBUF, "Failed to reserve space in commonring\n");
905 return 0;
906 }
907
908 for (i = 0; i < alloced; i++) {
909 rx_bufpost = (struct msgbuf_rx_bufpost *)ret_ptr;
910 memset(rx_bufpost, 0, sizeof(*rx_bufpost));
911
912 skb = brcmu_pkt_buf_get_skb(BRCMF_MSGBUF_MAX_PKT_SIZE);
913
914 if (skb == NULL) {
915 brcmf_err("Failed to alloc SKB\n");
916 brcmf_commonring_write_cancel(commonring, alloced - i);
917 break;
918 }
919
920 pktlen = skb->len;
921 if (brcmf_msgbuf_alloc_pktid(msgbuf->drvr->bus_if->dev,
922 msgbuf->rx_pktids, skb, 0,
923 &physaddr, &pktid)) {
924 dev_kfree_skb_any(skb);
925 brcmf_err("No PKTID available !!\n");
926 brcmf_commonring_write_cancel(commonring, alloced - i);
927 break;
928 }
929
930 if (msgbuf->rx_metadata_offset) {
931 address = (u64)physaddr;
932 rx_bufpost->metadata_buf_len =
933 cpu_to_le16(msgbuf->rx_metadata_offset);
934 rx_bufpost->metadata_buf_addr.high_addr =
935 cpu_to_le32(address >> 32);
936 rx_bufpost->metadata_buf_addr.low_addr =
937 cpu_to_le32(address & 0xffffffff);
938
939 skb_pull(skb, msgbuf->rx_metadata_offset);
940 pktlen = skb->len;
941 physaddr += msgbuf->rx_metadata_offset;
942 }
943 rx_bufpost->msg.msgtype = MSGBUF_TYPE_RXBUF_POST;
944 rx_bufpost->msg.request_id = cpu_to_le32(pktid);
945
946 address = (u64)physaddr;
947 rx_bufpost->data_buf_len = cpu_to_le16((u16)pktlen);
948 rx_bufpost->data_buf_addr.high_addr =
949 cpu_to_le32(address >> 32);
950 rx_bufpost->data_buf_addr.low_addr =
951 cpu_to_le32(address & 0xffffffff);
952
953 ret_ptr += brcmf_commonring_len_item(commonring);
954 }
955
956 if (i)
957 brcmf_commonring_write_complete(commonring);
958
959 return i;
960 }
961
962
963 static void
brcmf_msgbuf_rxbuf_data_fill(struct brcmf_msgbuf * msgbuf)964 brcmf_msgbuf_rxbuf_data_fill(struct brcmf_msgbuf *msgbuf)
965 {
966 u32 fillbufs;
967 u32 retcount;
968
969 fillbufs = msgbuf->max_rxbufpost - msgbuf->rxbufpost;
970
971 while (fillbufs) {
972 retcount = brcmf_msgbuf_rxbuf_data_post(msgbuf, fillbufs);
973 if (!retcount)
974 break;
975 msgbuf->rxbufpost += retcount;
976 fillbufs -= retcount;
977 }
978 }
979
980
981 static void
brcmf_msgbuf_update_rxbufpost_count(struct brcmf_msgbuf * msgbuf,u16 rxcnt)982 brcmf_msgbuf_update_rxbufpost_count(struct brcmf_msgbuf *msgbuf, u16 rxcnt)
983 {
984 msgbuf->rxbufpost -= rxcnt;
985 if (msgbuf->rxbufpost <= (msgbuf->max_rxbufpost -
986 BRCMF_MSGBUF_RXBUFPOST_THRESHOLD))
987 brcmf_msgbuf_rxbuf_data_fill(msgbuf);
988 }
989
990
991 static u32
brcmf_msgbuf_rxbuf_ctrl_post(struct brcmf_msgbuf * msgbuf,bool event_buf,u32 count)992 brcmf_msgbuf_rxbuf_ctrl_post(struct brcmf_msgbuf *msgbuf, bool event_buf,
993 u32 count)
994 {
995 struct brcmf_commonring *commonring;
996 void *ret_ptr;
997 struct sk_buff *skb;
998 u16 alloced;
999 u32 pktlen;
1000 dma_addr_t physaddr;
1001 struct msgbuf_rx_ioctl_resp_or_event *rx_bufpost;
1002 u64 address;
1003 u32 pktid;
1004 u32 i;
1005
1006 commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
1007 brcmf_commonring_lock(commonring);
1008 ret_ptr = brcmf_commonring_reserve_for_write_multiple(commonring,
1009 count,
1010 &alloced);
1011 if (!ret_ptr) {
1012 brcmf_err("Failed to reserve space in commonring\n");
1013 brcmf_commonring_unlock(commonring);
1014 return 0;
1015 }
1016
1017 for (i = 0; i < alloced; i++) {
1018 rx_bufpost = (struct msgbuf_rx_ioctl_resp_or_event *)ret_ptr;
1019 memset(rx_bufpost, 0, sizeof(*rx_bufpost));
1020
1021 skb = brcmu_pkt_buf_get_skb(BRCMF_MSGBUF_MAX_PKT_SIZE);
1022
1023 if (skb == NULL) {
1024 brcmf_err("Failed to alloc SKB\n");
1025 brcmf_commonring_write_cancel(commonring, alloced - i);
1026 break;
1027 }
1028
1029 pktlen = skb->len;
1030 if (brcmf_msgbuf_alloc_pktid(msgbuf->drvr->bus_if->dev,
1031 msgbuf->rx_pktids, skb, 0,
1032 &physaddr, &pktid)) {
1033 dev_kfree_skb_any(skb);
1034 brcmf_err("No PKTID available !!\n");
1035 brcmf_commonring_write_cancel(commonring, alloced - i);
1036 break;
1037 }
1038 if (event_buf)
1039 rx_bufpost->msg.msgtype = MSGBUF_TYPE_EVENT_BUF_POST;
1040 else
1041 rx_bufpost->msg.msgtype =
1042 MSGBUF_TYPE_IOCTLRESP_BUF_POST;
1043 rx_bufpost->msg.request_id = cpu_to_le32(pktid);
1044
1045 address = (u64)physaddr;
1046 rx_bufpost->host_buf_len = cpu_to_le16((u16)pktlen);
1047 rx_bufpost->host_buf_addr.high_addr =
1048 cpu_to_le32(address >> 32);
1049 rx_bufpost->host_buf_addr.low_addr =
1050 cpu_to_le32(address & 0xffffffff);
1051
1052 ret_ptr += brcmf_commonring_len_item(commonring);
1053 }
1054
1055 if (i)
1056 brcmf_commonring_write_complete(commonring);
1057
1058 brcmf_commonring_unlock(commonring);
1059
1060 return i;
1061 }
1062
1063
brcmf_msgbuf_rxbuf_ioctlresp_post(struct brcmf_msgbuf * msgbuf)1064 static void brcmf_msgbuf_rxbuf_ioctlresp_post(struct brcmf_msgbuf *msgbuf)
1065 {
1066 u32 count;
1067
1068 count = msgbuf->max_ioctlrespbuf - msgbuf->cur_ioctlrespbuf;
1069 count = brcmf_msgbuf_rxbuf_ctrl_post(msgbuf, false, count);
1070 msgbuf->cur_ioctlrespbuf += count;
1071 }
1072
1073
brcmf_msgbuf_rxbuf_event_post(struct brcmf_msgbuf * msgbuf)1074 static void brcmf_msgbuf_rxbuf_event_post(struct brcmf_msgbuf *msgbuf)
1075 {
1076 u32 count;
1077
1078 count = msgbuf->max_eventbuf - msgbuf->cur_eventbuf;
1079 count = brcmf_msgbuf_rxbuf_ctrl_post(msgbuf, true, count);
1080 msgbuf->cur_eventbuf += count;
1081 }
1082
1083
1084 static void
brcmf_msgbuf_rx_skb(struct brcmf_msgbuf * msgbuf,struct sk_buff * skb,u8 ifidx)1085 brcmf_msgbuf_rx_skb(struct brcmf_msgbuf *msgbuf, struct sk_buff *skb,
1086 u8 ifidx)
1087 {
1088 struct brcmf_if *ifp;
1089
1090 /* The ifidx is the idx to map to matching netdev/ifp. When receiving
1091 * events this is easy because it contains the bssidx which maps
1092 * 1-on-1 to the netdev/ifp. But for data frames the ifidx is rcvd.
1093 * bssidx 1 is used for p2p0 and no data can be received or
1094 * transmitted on it. Therefor bssidx is ifidx + 1 if ifidx > 0
1095 */
1096 if (ifidx)
1097 (ifidx)++;
1098 ifp = msgbuf->drvr->iflist[ifidx];
1099 if (!ifp || !ifp->ndev) {
1100 brcmf_err("Received pkt for invalid ifidx %d\n", ifidx);
1101 brcmu_pkt_buf_free_skb(skb);
1102 return;
1103 }
1104 brcmf_netif_rx(ifp, skb);
1105 }
1106
1107
brcmf_msgbuf_process_event(struct brcmf_msgbuf * msgbuf,void * buf)1108 static void brcmf_msgbuf_process_event(struct brcmf_msgbuf *msgbuf, void *buf)
1109 {
1110 struct msgbuf_rx_event *event;
1111 u32 idx;
1112 u16 buflen;
1113 struct sk_buff *skb;
1114
1115 event = (struct msgbuf_rx_event *)buf;
1116 idx = le32_to_cpu(event->msg.request_id);
1117 buflen = le16_to_cpu(event->event_data_len);
1118
1119 if (msgbuf->cur_eventbuf)
1120 msgbuf->cur_eventbuf--;
1121 brcmf_msgbuf_rxbuf_event_post(msgbuf);
1122
1123 skb = brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
1124 msgbuf->rx_pktids, idx);
1125 if (!skb)
1126 return;
1127
1128 if (msgbuf->rx_dataoffset)
1129 skb_pull(skb, msgbuf->rx_dataoffset);
1130
1131 skb_trim(skb, buflen);
1132
1133 brcmf_msgbuf_rx_skb(msgbuf, skb, event->msg.ifidx);
1134 }
1135
1136
1137 static void
brcmf_msgbuf_process_rx_complete(struct brcmf_msgbuf * msgbuf,void * buf)1138 brcmf_msgbuf_process_rx_complete(struct brcmf_msgbuf *msgbuf, void *buf)
1139 {
1140 struct msgbuf_rx_complete *rx_complete;
1141 struct sk_buff *skb;
1142 u16 data_offset;
1143 u16 buflen;
1144 u32 idx;
1145
1146 brcmf_msgbuf_update_rxbufpost_count(msgbuf, 1);
1147
1148 rx_complete = (struct msgbuf_rx_complete *)buf;
1149 data_offset = le16_to_cpu(rx_complete->data_offset);
1150 buflen = le16_to_cpu(rx_complete->data_len);
1151 idx = le32_to_cpu(rx_complete->msg.request_id);
1152
1153 skb = brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
1154 msgbuf->rx_pktids, idx);
1155 if (!skb)
1156 return;
1157
1158 if (data_offset)
1159 skb_pull(skb, data_offset);
1160 else if (msgbuf->rx_dataoffset)
1161 skb_pull(skb, msgbuf->rx_dataoffset);
1162
1163 skb_trim(skb, buflen);
1164
1165 brcmf_msgbuf_rx_skb(msgbuf, skb, rx_complete->msg.ifidx);
1166 }
1167
1168
1169 static void
brcmf_msgbuf_process_flow_ring_create_response(struct brcmf_msgbuf * msgbuf,void * buf)1170 brcmf_msgbuf_process_flow_ring_create_response(struct brcmf_msgbuf *msgbuf,
1171 void *buf)
1172 {
1173 struct msgbuf_flowring_create_resp *flowring_create_resp;
1174 u16 status;
1175 u16 flowid;
1176
1177 flowring_create_resp = (struct msgbuf_flowring_create_resp *)buf;
1178
1179 flowid = le16_to_cpu(flowring_create_resp->compl_hdr.flow_ring_id);
1180 flowid -= BRCMF_NROF_H2D_COMMON_MSGRINGS;
1181 status = le16_to_cpu(flowring_create_resp->compl_hdr.status);
1182
1183 if (status) {
1184 brcmf_err("Flowring creation failed, code %d\n", status);
1185 brcmf_msgbuf_remove_flowring(msgbuf, flowid);
1186 return;
1187 }
1188 brcmf_dbg(MSGBUF, "Flowring %d Create response status %d\n", flowid,
1189 status);
1190
1191 brcmf_flowring_open(msgbuf->flow, flowid);
1192
1193 brcmf_msgbuf_schedule_txdata(msgbuf, flowid, true);
1194 }
1195
1196
1197 static void
brcmf_msgbuf_process_flow_ring_delete_response(struct brcmf_msgbuf * msgbuf,void * buf)1198 brcmf_msgbuf_process_flow_ring_delete_response(struct brcmf_msgbuf *msgbuf,
1199 void *buf)
1200 {
1201 struct msgbuf_flowring_delete_resp *flowring_delete_resp;
1202 u16 status;
1203 u16 flowid;
1204
1205 flowring_delete_resp = (struct msgbuf_flowring_delete_resp *)buf;
1206
1207 flowid = le16_to_cpu(flowring_delete_resp->compl_hdr.flow_ring_id);
1208 flowid -= BRCMF_NROF_H2D_COMMON_MSGRINGS;
1209 status = le16_to_cpu(flowring_delete_resp->compl_hdr.status);
1210
1211 if (status) {
1212 brcmf_err("Flowring deletion failed, code %d\n", status);
1213 brcmf_flowring_delete(msgbuf->flow, flowid);
1214 return;
1215 }
1216 brcmf_dbg(MSGBUF, "Flowring %d Delete response status %d\n", flowid,
1217 status);
1218
1219 brcmf_msgbuf_remove_flowring(msgbuf, flowid);
1220 }
1221
1222
brcmf_msgbuf_process_msgtype(struct brcmf_msgbuf * msgbuf,void * buf)1223 static void brcmf_msgbuf_process_msgtype(struct brcmf_msgbuf *msgbuf, void *buf)
1224 {
1225 struct msgbuf_common_hdr *msg;
1226
1227 msg = (struct msgbuf_common_hdr *)buf;
1228 switch (msg->msgtype) {
1229 case MSGBUF_TYPE_FLOW_RING_CREATE_CMPLT:
1230 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_FLOW_RING_CREATE_CMPLT\n");
1231 brcmf_msgbuf_process_flow_ring_create_response(msgbuf, buf);
1232 break;
1233 case MSGBUF_TYPE_FLOW_RING_DELETE_CMPLT:
1234 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_FLOW_RING_DELETE_CMPLT\n");
1235 brcmf_msgbuf_process_flow_ring_delete_response(msgbuf, buf);
1236 break;
1237 case MSGBUF_TYPE_IOCTLPTR_REQ_ACK:
1238 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_IOCTLPTR_REQ_ACK\n");
1239 break;
1240 case MSGBUF_TYPE_IOCTL_CMPLT:
1241 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_IOCTL_CMPLT\n");
1242 brcmf_msgbuf_process_ioctl_complete(msgbuf, buf);
1243 break;
1244 case MSGBUF_TYPE_WL_EVENT:
1245 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_WL_EVENT\n");
1246 brcmf_msgbuf_process_event(msgbuf, buf);
1247 break;
1248 case MSGBUF_TYPE_TX_STATUS:
1249 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_TX_STATUS\n");
1250 brcmf_msgbuf_process_txstatus(msgbuf, buf);
1251 break;
1252 case MSGBUF_TYPE_RX_CMPLT:
1253 brcmf_dbg(MSGBUF, "MSGBUF_TYPE_RX_CMPLT\n");
1254 brcmf_msgbuf_process_rx_complete(msgbuf, buf);
1255 break;
1256 default:
1257 brcmf_err("Unsupported msgtype %d\n", msg->msgtype);
1258 break;
1259 }
1260 }
1261
1262
brcmf_msgbuf_process_rx(struct brcmf_msgbuf * msgbuf,struct brcmf_commonring * commonring)1263 static void brcmf_msgbuf_process_rx(struct brcmf_msgbuf *msgbuf,
1264 struct brcmf_commonring *commonring)
1265 {
1266 void *buf;
1267 u16 count;
1268
1269 again:
1270 buf = brcmf_commonring_get_read_ptr(commonring, &count);
1271 if (buf == NULL)
1272 return;
1273
1274 while (count) {
1275 brcmf_msgbuf_process_msgtype(msgbuf,
1276 buf + msgbuf->rx_dataoffset);
1277 buf += brcmf_commonring_len_item(commonring);
1278 count--;
1279 }
1280 brcmf_commonring_read_complete(commonring);
1281
1282 if (commonring->r_ptr == 0)
1283 goto again;
1284 }
1285
1286
brcmf_proto_msgbuf_rx_trigger(struct device * dev)1287 int brcmf_proto_msgbuf_rx_trigger(struct device *dev)
1288 {
1289 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1290 struct brcmf_pub *drvr = bus_if->drvr;
1291 struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
1292 struct brcmf_commonring *commonring;
1293 void *buf;
1294 u32 flowid;
1295 int qlen;
1296
1297 buf = msgbuf->commonrings[BRCMF_D2H_MSGRING_RX_COMPLETE];
1298 brcmf_msgbuf_process_rx(msgbuf, buf);
1299 buf = msgbuf->commonrings[BRCMF_D2H_MSGRING_TX_COMPLETE];
1300 brcmf_msgbuf_process_rx(msgbuf, buf);
1301 buf = msgbuf->commonrings[BRCMF_D2H_MSGRING_CONTROL_COMPLETE];
1302 brcmf_msgbuf_process_rx(msgbuf, buf);
1303
1304 for_each_set_bit(flowid, msgbuf->txstatus_done_map,
1305 msgbuf->nrof_flowrings) {
1306 clear_bit(flowid, msgbuf->txstatus_done_map);
1307 commonring = msgbuf->flowrings[flowid];
1308 qlen = brcmf_flowring_qlen(msgbuf->flow, flowid);
1309 if ((qlen > BRCMF_MSGBUF_TRICKLE_TXWORKER_THRS) ||
1310 ((qlen) && (atomic_read(&commonring->outstanding_tx) <
1311 BRCMF_MSGBUF_TRICKLE_TXWORKER_THRS)))
1312 brcmf_msgbuf_schedule_txdata(msgbuf, flowid, true);
1313 }
1314
1315 return 0;
1316 }
1317
1318
brcmf_msgbuf_delete_flowring(struct brcmf_pub * drvr,u8 flowid)1319 void brcmf_msgbuf_delete_flowring(struct brcmf_pub *drvr, u8 flowid)
1320 {
1321 struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
1322 struct msgbuf_tx_flowring_delete_req *delete;
1323 struct brcmf_commonring *commonring;
1324 void *ret_ptr;
1325 u8 ifidx;
1326 int err;
1327
1328 commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
1329 brcmf_commonring_lock(commonring);
1330 ret_ptr = brcmf_commonring_reserve_for_write(commonring);
1331 if (!ret_ptr) {
1332 brcmf_err("FW unaware, flowring will be removed !!\n");
1333 brcmf_commonring_unlock(commonring);
1334 brcmf_msgbuf_remove_flowring(msgbuf, flowid);
1335 return;
1336 }
1337
1338 delete = (struct msgbuf_tx_flowring_delete_req *)ret_ptr;
1339
1340 ifidx = brcmf_flowring_ifidx_get(msgbuf->flow, flowid);
1341
1342 delete->msg.msgtype = MSGBUF_TYPE_FLOW_RING_DELETE;
1343 delete->msg.ifidx = ifidx;
1344 delete->msg.request_id = 0;
1345
1346 delete->flow_ring_id = cpu_to_le16(flowid +
1347 BRCMF_NROF_H2D_COMMON_MSGRINGS);
1348 delete->reason = 0;
1349
1350 brcmf_dbg(MSGBUF, "Send Flow Delete Req flow ID %d, ifindex %d\n",
1351 flowid, ifidx);
1352
1353 err = brcmf_commonring_write_complete(commonring);
1354 brcmf_commonring_unlock(commonring);
1355 if (err) {
1356 brcmf_err("Failed to submit RING_DELETE, flowring will be removed\n");
1357 brcmf_msgbuf_remove_flowring(msgbuf, flowid);
1358 }
1359 }
1360
1361
brcmf_proto_msgbuf_attach(struct brcmf_pub * drvr)1362 int brcmf_proto_msgbuf_attach(struct brcmf_pub *drvr)
1363 {
1364 struct brcmf_bus_msgbuf *if_msgbuf;
1365 struct brcmf_msgbuf *msgbuf;
1366 u64 address;
1367 u32 count;
1368
1369 if_msgbuf = drvr->bus_if->msgbuf;
1370 msgbuf = kzalloc(sizeof(*msgbuf), GFP_KERNEL);
1371 if (!msgbuf)
1372 goto fail;
1373
1374 msgbuf->txflow_wq = create_singlethread_workqueue("msgbuf_txflow");
1375 if (msgbuf->txflow_wq == NULL) {
1376 brcmf_err("workqueue creation failed\n");
1377 goto fail;
1378 }
1379 INIT_WORK(&msgbuf->txflow_work, brcmf_msgbuf_txflow_worker);
1380 count = BITS_TO_LONGS(if_msgbuf->nrof_flowrings);
1381 count = count * sizeof(unsigned long);
1382 msgbuf->flow_map = kzalloc(count, GFP_KERNEL);
1383 if (!msgbuf->flow_map)
1384 goto fail;
1385
1386 msgbuf->txstatus_done_map = kzalloc(count, GFP_KERNEL);
1387 if (!msgbuf->txstatus_done_map)
1388 goto fail;
1389
1390 msgbuf->drvr = drvr;
1391 msgbuf->ioctbuf = dma_alloc_coherent(drvr->bus_if->dev,
1392 BRCMF_TX_IOCTL_MAX_MSG_SIZE,
1393 &msgbuf->ioctbuf_handle,
1394 GFP_KERNEL);
1395 if (!msgbuf->ioctbuf)
1396 goto fail;
1397 address = (u64)msgbuf->ioctbuf_handle;
1398 msgbuf->ioctbuf_phys_hi = address >> 32;
1399 msgbuf->ioctbuf_phys_lo = address & 0xffffffff;
1400
1401 drvr->proto->hdrpull = brcmf_msgbuf_hdrpull;
1402 drvr->proto->query_dcmd = brcmf_msgbuf_query_dcmd;
1403 drvr->proto->set_dcmd = brcmf_msgbuf_set_dcmd;
1404 drvr->proto->txdata = brcmf_msgbuf_txdata;
1405 drvr->proto->configure_addr_mode = brcmf_msgbuf_configure_addr_mode;
1406 drvr->proto->delete_peer = brcmf_msgbuf_delete_peer;
1407 drvr->proto->add_tdls_peer = brcmf_msgbuf_add_tdls_peer;
1408 drvr->proto->pd = msgbuf;
1409
1410 init_waitqueue_head(&msgbuf->ioctl_resp_wait);
1411
1412 msgbuf->commonrings =
1413 (struct brcmf_commonring **)if_msgbuf->commonrings;
1414 msgbuf->flowrings = (struct brcmf_commonring **)if_msgbuf->flowrings;
1415 msgbuf->nrof_flowrings = if_msgbuf->nrof_flowrings;
1416 msgbuf->flowring_dma_handle = kzalloc(msgbuf->nrof_flowrings *
1417 sizeof(*msgbuf->flowring_dma_handle), GFP_KERNEL);
1418 if (!msgbuf->flowring_dma_handle)
1419 goto fail;
1420
1421 msgbuf->rx_dataoffset = if_msgbuf->rx_dataoffset;
1422 msgbuf->max_rxbufpost = if_msgbuf->max_rxbufpost;
1423
1424 msgbuf->max_ioctlrespbuf = BRCMF_MSGBUF_MAX_IOCTLRESPBUF_POST;
1425 msgbuf->max_eventbuf = BRCMF_MSGBUF_MAX_EVENTBUF_POST;
1426
1427 msgbuf->tx_pktids = brcmf_msgbuf_init_pktids(NR_TX_PKTIDS,
1428 DMA_TO_DEVICE);
1429 if (!msgbuf->tx_pktids)
1430 goto fail;
1431 msgbuf->rx_pktids = brcmf_msgbuf_init_pktids(NR_RX_PKTIDS,
1432 DMA_FROM_DEVICE);
1433 if (!msgbuf->rx_pktids)
1434 goto fail;
1435
1436 msgbuf->flow = brcmf_flowring_attach(drvr->bus_if->dev,
1437 if_msgbuf->nrof_flowrings);
1438 if (!msgbuf->flow)
1439 goto fail;
1440
1441
1442 brcmf_dbg(MSGBUF, "Feeding buffers, rx data %d, rx event %d, rx ioctl resp %d\n",
1443 msgbuf->max_rxbufpost, msgbuf->max_eventbuf,
1444 msgbuf->max_ioctlrespbuf);
1445 count = 0;
1446 do {
1447 brcmf_msgbuf_rxbuf_data_fill(msgbuf);
1448 if (msgbuf->max_rxbufpost != msgbuf->rxbufpost)
1449 msleep(10);
1450 else
1451 break;
1452 count++;
1453 } while (count < 10);
1454 brcmf_msgbuf_rxbuf_event_post(msgbuf);
1455 brcmf_msgbuf_rxbuf_ioctlresp_post(msgbuf);
1456
1457 INIT_WORK(&msgbuf->flowring_work, brcmf_msgbuf_flowring_worker);
1458 spin_lock_init(&msgbuf->flowring_work_lock);
1459 INIT_LIST_HEAD(&msgbuf->work_queue);
1460
1461 return 0;
1462
1463 fail:
1464 if (msgbuf) {
1465 kfree(msgbuf->flow_map);
1466 kfree(msgbuf->txstatus_done_map);
1467 brcmf_msgbuf_release_pktids(msgbuf);
1468 kfree(msgbuf->flowring_dma_handle);
1469 if (msgbuf->ioctbuf)
1470 dma_free_coherent(drvr->bus_if->dev,
1471 BRCMF_TX_IOCTL_MAX_MSG_SIZE,
1472 msgbuf->ioctbuf,
1473 msgbuf->ioctbuf_handle);
1474 kfree(msgbuf);
1475 }
1476 return -ENOMEM;
1477 }
1478
1479
brcmf_proto_msgbuf_detach(struct brcmf_pub * drvr)1480 void brcmf_proto_msgbuf_detach(struct brcmf_pub *drvr)
1481 {
1482 struct brcmf_msgbuf *msgbuf;
1483 struct brcmf_msgbuf_work_item *work;
1484
1485 brcmf_dbg(TRACE, "Enter\n");
1486 if (drvr->proto->pd) {
1487 msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
1488 cancel_work_sync(&msgbuf->flowring_work);
1489 while (!list_empty(&msgbuf->work_queue)) {
1490 work = list_first_entry(&msgbuf->work_queue,
1491 struct brcmf_msgbuf_work_item,
1492 queue);
1493 list_del(&work->queue);
1494 kfree(work);
1495 }
1496 kfree(msgbuf->flow_map);
1497 kfree(msgbuf->txstatus_done_map);
1498 if (msgbuf->txflow_wq)
1499 destroy_workqueue(msgbuf->txflow_wq);
1500
1501 brcmf_flowring_detach(msgbuf->flow);
1502 dma_free_coherent(drvr->bus_if->dev,
1503 BRCMF_TX_IOCTL_MAX_MSG_SIZE,
1504 msgbuf->ioctbuf, msgbuf->ioctbuf_handle);
1505 brcmf_msgbuf_release_pktids(msgbuf);
1506 kfree(msgbuf->flowring_dma_handle);
1507 kfree(msgbuf);
1508 drvr->proto->pd = NULL;
1509 }
1510 }
1511