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fix a kmap leak in virtio_console
[linux/fpc-iii.git] / drivers / net / wireless / ath / ath10k / htt_tx.c
blobf1d36d2d27235aeec979fed652d2925ec6e94513
1 /*
2 * Copyright (c) 2005-2011 Atheros Communications Inc.
3 * Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include <linux/etherdevice.h>
19 #include "htt.h"
20 #include "mac.h"
21 #include "hif.h"
22 #include "txrx.h"
23 #include "debug.h"
24
25 void __ath10k_htt_tx_dec_pending(struct ath10k_htt *htt)
26 {
27 htt->num_pending_tx--;
28 if (htt->num_pending_tx == htt->max_num_pending_tx - 1)
29 ieee80211_wake_queues(htt->ar->hw);
30 }
31
32 static void ath10k_htt_tx_dec_pending(struct ath10k_htt *htt)
33 {
34 spin_lock_bh(&htt->tx_lock);
35 __ath10k_htt_tx_dec_pending(htt);
36 spin_unlock_bh(&htt->tx_lock);
37 }
38
39 static int ath10k_htt_tx_inc_pending(struct ath10k_htt *htt)
40 {
41 int ret = 0;
42
43 spin_lock_bh(&htt->tx_lock);
44
45 if (htt->num_pending_tx >= htt->max_num_pending_tx) {
46 ret = -EBUSY;
47 goto exit;
48 }
49
50 htt->num_pending_tx++;
51 if (htt->num_pending_tx == htt->max_num_pending_tx)
52 ieee80211_stop_queues(htt->ar->hw);
53
54 exit:
55 spin_unlock_bh(&htt->tx_lock);
56 return ret;
57 }
58
59 int ath10k_htt_tx_alloc_msdu_id(struct ath10k_htt *htt)
60 {
61 int msdu_id;
62
63 lockdep_assert_held(&htt->tx_lock);
64
65 msdu_id = find_first_zero_bit(htt->used_msdu_ids,
66 htt->max_num_pending_tx);
67 if (msdu_id == htt->max_num_pending_tx)
68 return -ENOBUFS;
69
70 ath10k_dbg(ATH10K_DBG_HTT, "htt tx alloc msdu_id %d\n", msdu_id);
71 __set_bit(msdu_id, htt->used_msdu_ids);
72 return msdu_id;
73 }
74
75 void ath10k_htt_tx_free_msdu_id(struct ath10k_htt *htt, u16 msdu_id)
76 {
77 lockdep_assert_held(&htt->tx_lock);
78
79 if (!test_bit(msdu_id, htt->used_msdu_ids))
80 ath10k_warn("trying to free unallocated msdu_id %d\n", msdu_id);
81
82 ath10k_dbg(ATH10K_DBG_HTT, "htt tx free msdu_id %hu\n", msdu_id);
83 __clear_bit(msdu_id, htt->used_msdu_ids);
84 }
85
86 int ath10k_htt_tx_attach(struct ath10k_htt *htt)
87 {
88 spin_lock_init(&htt->tx_lock);
89 init_waitqueue_head(&htt->empty_tx_wq);
90
91 if (test_bit(ATH10K_FW_FEATURE_WMI_10X, htt->ar->fw_features))
92 htt->max_num_pending_tx = TARGET_10X_NUM_MSDU_DESC;
93 else
94 htt->max_num_pending_tx = TARGET_NUM_MSDU_DESC;
95
96 ath10k_dbg(ATH10K_DBG_BOOT, "htt tx max num pending tx %d\n",
97 htt->max_num_pending_tx);
98
99 htt->pending_tx = kzalloc(sizeof(*htt->pending_tx) *
100 htt->max_num_pending_tx, GFP_KERNEL);
101 if (!htt->pending_tx)
102 return -ENOMEM;
103
104 htt->used_msdu_ids = kzalloc(sizeof(unsigned long) *
105 BITS_TO_LONGS(htt->max_num_pending_tx),
106 GFP_KERNEL);
107 if (!htt->used_msdu_ids) {
108 kfree(htt->pending_tx);
109 return -ENOMEM;
110 }
111
112 return 0;
113 }
114
115 static void ath10k_htt_tx_cleanup_pending(struct ath10k_htt *htt)
116 {
117 struct htt_tx_done tx_done = {0};
118 int msdu_id;
119
120 /* No locks needed. Called after communication with the device has
121 * been stopped. */
122
123 for (msdu_id = 0; msdu_id < htt->max_num_pending_tx; msdu_id++) {
124 if (!test_bit(msdu_id, htt->used_msdu_ids))
125 continue;
126
127 ath10k_dbg(ATH10K_DBG_HTT, "force cleanup msdu_id %hu\n",
128 msdu_id);
129
130 tx_done.discard = 1;
131 tx_done.msdu_id = msdu_id;
132
133 ath10k_txrx_tx_unref(htt, &tx_done);
134 }
135 }
136
137 void ath10k_htt_tx_detach(struct ath10k_htt *htt)
138 {
139 ath10k_htt_tx_cleanup_pending(htt);
140 kfree(htt->pending_tx);
141 kfree(htt->used_msdu_ids);
142 return;
143 }
144
145 void ath10k_htt_htc_tx_complete(struct ath10k *ar, struct sk_buff *skb)
146 {
147 dev_kfree_skb_any(skb);
148 }
149
150 int ath10k_htt_h2t_ver_req_msg(struct ath10k_htt *htt)
151 {
152 struct sk_buff *skb;
153 struct htt_cmd *cmd;
154 int len = 0;
155 int ret;
156
157 len += sizeof(cmd->hdr);
158 len += sizeof(cmd->ver_req);
159
160 skb = ath10k_htc_alloc_skb(len);
161 if (!skb)
162 return -ENOMEM;
163
164 skb_put(skb, len);
165 cmd = (struct htt_cmd *)skb->data;
166 cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_VERSION_REQ;
167
168 ret = ath10k_htc_send(&htt->ar->htc, htt->eid, skb);
169 if (ret) {
170 dev_kfree_skb_any(skb);
171 return ret;
172 }
173
174 return 0;
175 }
176
177 int ath10k_htt_h2t_stats_req(struct ath10k_htt *htt, u8 mask, u64 cookie)
178 {
179 struct htt_stats_req *req;
180 struct sk_buff *skb;
181 struct htt_cmd *cmd;
182 int len = 0, ret;
183
184 len += sizeof(cmd->hdr);
185 len += sizeof(cmd->stats_req);
186
187 skb = ath10k_htc_alloc_skb(len);
188 if (!skb)
189 return -ENOMEM;
190
191 skb_put(skb, len);
192 cmd = (struct htt_cmd *)skb->data;
193 cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_STATS_REQ;
194
195 req = &cmd->stats_req;
196
197 memset(req, 0, sizeof(*req));
198
199 /* currently we support only max 8 bit masks so no need to worry
200 * about endian support */
201 req->upload_types[0] = mask;
202 req->reset_types[0] = mask;
203 req->stat_type = HTT_STATS_REQ_CFG_STAT_TYPE_INVALID;
204 req->cookie_lsb = cpu_to_le32(cookie & 0xffffffff);
205 req->cookie_msb = cpu_to_le32((cookie & 0xffffffff00000000ULL) >> 32);
206
207 ret = ath10k_htc_send(&htt->ar->htc, htt->eid, skb);
208 if (ret) {
209 ath10k_warn("failed to send htt type stats request: %d", ret);
210 dev_kfree_skb_any(skb);
211 return ret;
212 }
213
214 return 0;
215 }
216
217 int ath10k_htt_send_rx_ring_cfg_ll(struct ath10k_htt *htt)
218 {
219 struct sk_buff *skb;
220 struct htt_cmd *cmd;
221 struct htt_rx_ring_setup_ring *ring;
222 const int num_rx_ring = 1;
223 u16 flags;
224 u32 fw_idx;
225 int len;
226 int ret;
227
228 /*
229 * the HW expects the buffer to be an integral number of 4-byte
230 * "words"
231 */
232 BUILD_BUG_ON(!IS_ALIGNED(HTT_RX_BUF_SIZE, 4));
233 BUILD_BUG_ON((HTT_RX_BUF_SIZE & HTT_MAX_CACHE_LINE_SIZE_MASK) != 0);
234
235 len = sizeof(cmd->hdr) + sizeof(cmd->rx_setup.hdr)
236 + (sizeof(*ring) * num_rx_ring);
237 skb = ath10k_htc_alloc_skb(len);
238 if (!skb)
239 return -ENOMEM;
240
241 skb_put(skb, len);
242
243 cmd = (struct htt_cmd *)skb->data;
244 ring = &cmd->rx_setup.rings[0];
245
246 cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_RX_RING_CFG;
247 cmd->rx_setup.hdr.num_rings = 1;
248
249 /* FIXME: do we need all of this? */
250 flags = 0;
251 flags |= HTT_RX_RING_FLAGS_MAC80211_HDR;
252 flags |= HTT_RX_RING_FLAGS_MSDU_PAYLOAD;
253 flags |= HTT_RX_RING_FLAGS_PPDU_START;
254 flags |= HTT_RX_RING_FLAGS_PPDU_END;
255 flags |= HTT_RX_RING_FLAGS_MPDU_START;
256 flags |= HTT_RX_RING_FLAGS_MPDU_END;
257 flags |= HTT_RX_RING_FLAGS_MSDU_START;
258 flags |= HTT_RX_RING_FLAGS_MSDU_END;
259 flags |= HTT_RX_RING_FLAGS_RX_ATTENTION;
260 flags |= HTT_RX_RING_FLAGS_FRAG_INFO;
261 flags |= HTT_RX_RING_FLAGS_UNICAST_RX;
262 flags |= HTT_RX_RING_FLAGS_MULTICAST_RX;
263 flags |= HTT_RX_RING_FLAGS_CTRL_RX;
264 flags |= HTT_RX_RING_FLAGS_MGMT_RX;
265 flags |= HTT_RX_RING_FLAGS_NULL_RX;
266 flags |= HTT_RX_RING_FLAGS_PHY_DATA_RX;
267
268 fw_idx = __le32_to_cpu(*htt->rx_ring.alloc_idx.vaddr);
269
270 ring->fw_idx_shadow_reg_paddr =
271 __cpu_to_le32(htt->rx_ring.alloc_idx.paddr);
272 ring->rx_ring_base_paddr = __cpu_to_le32(htt->rx_ring.base_paddr);
273 ring->rx_ring_len = __cpu_to_le16(htt->rx_ring.size);
274 ring->rx_ring_bufsize = __cpu_to_le16(HTT_RX_BUF_SIZE);
275 ring->flags = __cpu_to_le16(flags);
276 ring->fw_idx_init_val = __cpu_to_le16(fw_idx);
277
278 #define desc_offset(x) (offsetof(struct htt_rx_desc, x) / 4)
279
280 ring->mac80211_hdr_offset = __cpu_to_le16(desc_offset(rx_hdr_status));
281 ring->msdu_payload_offset = __cpu_to_le16(desc_offset(msdu_payload));
282 ring->ppdu_start_offset = __cpu_to_le16(desc_offset(ppdu_start));
283 ring->ppdu_end_offset = __cpu_to_le16(desc_offset(ppdu_end));
284 ring->mpdu_start_offset = __cpu_to_le16(desc_offset(mpdu_start));
285 ring->mpdu_end_offset = __cpu_to_le16(desc_offset(mpdu_end));
286 ring->msdu_start_offset = __cpu_to_le16(desc_offset(msdu_start));
287 ring->msdu_end_offset = __cpu_to_le16(desc_offset(msdu_end));
288 ring->rx_attention_offset = __cpu_to_le16(desc_offset(attention));
289 ring->frag_info_offset = __cpu_to_le16(desc_offset(frag_info));
290
291 #undef desc_offset
292
293 ret = ath10k_htc_send(&htt->ar->htc, htt->eid, skb);
294 if (ret) {
295 dev_kfree_skb_any(skb);
296 return ret;
297 }
298
299 return 0;
300 }
301
302 int ath10k_htt_mgmt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
303 {
304 struct device *dev = htt->ar->dev;
305 struct sk_buff *txdesc = NULL;
306 struct htt_cmd *cmd;
307 struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(msdu);
308 u8 vdev_id = skb_cb->vdev_id;
309 int len = 0;
310 int msdu_id = -1;
311 int res;
312
313
314 res = ath10k_htt_tx_inc_pending(htt);
315 if (res)
316 goto err;
317
318 len += sizeof(cmd->hdr);
319 len += sizeof(cmd->mgmt_tx);
320
321 spin_lock_bh(&htt->tx_lock);
322 res = ath10k_htt_tx_alloc_msdu_id(htt);
323 if (res < 0) {
324 spin_unlock_bh(&htt->tx_lock);
325 goto err_tx_dec;
326 }
327 msdu_id = res;
328 htt->pending_tx[msdu_id] = msdu;
329 spin_unlock_bh(&htt->tx_lock);
330
331 txdesc = ath10k_htc_alloc_skb(len);
332 if (!txdesc) {
333 res = -ENOMEM;
334 goto err_free_msdu_id;
335 }
336
337 res = ath10k_skb_map(dev, msdu);
338 if (res)
339 goto err_free_txdesc;
340
341 skb_put(txdesc, len);
342 cmd = (struct htt_cmd *)txdesc->data;
343 cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_MGMT_TX;
344 cmd->mgmt_tx.msdu_paddr = __cpu_to_le32(ATH10K_SKB_CB(msdu)->paddr);
345 cmd->mgmt_tx.len = __cpu_to_le32(msdu->len);
346 cmd->mgmt_tx.desc_id = __cpu_to_le32(msdu_id);
347 cmd->mgmt_tx.vdev_id = __cpu_to_le32(vdev_id);
348 memcpy(cmd->mgmt_tx.hdr, msdu->data,
349 min_t(int, msdu->len, HTT_MGMT_FRM_HDR_DOWNLOAD_LEN));
350
351 skb_cb->htt.frag_len = 0;
352 skb_cb->htt.pad_len = 0;
353
354 res = ath10k_htc_send(&htt->ar->htc, htt->eid, txdesc);
355 if (res)
356 goto err_unmap_msdu;
357
358 return 0;
359
360 err_unmap_msdu:
361 ath10k_skb_unmap(dev, msdu);
362 err_free_txdesc:
363 dev_kfree_skb_any(txdesc);
364 err_free_msdu_id:
365 spin_lock_bh(&htt->tx_lock);
366 htt->pending_tx[msdu_id] = NULL;
367 ath10k_htt_tx_free_msdu_id(htt, msdu_id);
368 spin_unlock_bh(&htt->tx_lock);
369 err_tx_dec:
370 ath10k_htt_tx_dec_pending(htt);
371 err:
372 return res;
373 }
374
375 int ath10k_htt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
376 {
377 struct device *dev = htt->ar->dev;
378 struct htt_cmd *cmd;
379 struct htt_data_tx_desc_frag *tx_frags;
380 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)msdu->data;
381 struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(msdu);
382 struct sk_buff *txdesc = NULL;
383 bool use_frags;
384 u8 vdev_id = ATH10K_SKB_CB(msdu)->vdev_id;
385 u8 tid;
386 int prefetch_len, desc_len;
387 int msdu_id = -1;
388 int res;
389 u8 flags0;
390 u16 flags1;
391
392 res = ath10k_htt_tx_inc_pending(htt);
393 if (res)
394 goto err;
395
396 spin_lock_bh(&htt->tx_lock);
397 res = ath10k_htt_tx_alloc_msdu_id(htt);
398 if (res < 0) {
399 spin_unlock_bh(&htt->tx_lock);
400 goto err_tx_dec;
401 }
402 msdu_id = res;
403 htt->pending_tx[msdu_id] = msdu;
404 spin_unlock_bh(&htt->tx_lock);
405
406 prefetch_len = min(htt->prefetch_len, msdu->len);
407 prefetch_len = roundup(prefetch_len, 4);
408
409 desc_len = sizeof(cmd->hdr) + sizeof(cmd->data_tx) + prefetch_len;
410
411 txdesc = ath10k_htc_alloc_skb(desc_len);
412 if (!txdesc) {
413 res = -ENOMEM;
414 goto err_free_msdu_id;
415 }
416
417 /* Since HTT 3.0 there is no separate mgmt tx command. However in case
418 * of mgmt tx using TX_FRM there is not tx fragment list. Instead of tx
419 * fragment list host driver specifies directly frame pointer. */
420 use_frags = htt->target_version_major < 3 ||
421 !ieee80211_is_mgmt(hdr->frame_control);
422
423 if (!IS_ALIGNED((unsigned long)txdesc->data, 4)) {
424 ath10k_warn("htt alignment check failed. dropping packet.\n");
425 res = -EIO;
426 goto err_free_txdesc;
427 }
428
429 if (use_frags) {
430 skb_cb->htt.frag_len = sizeof(*tx_frags) * 2;
431 skb_cb->htt.pad_len = (unsigned long)msdu->data -
432 round_down((unsigned long)msdu->data, 4);
433
434 skb_push(msdu, skb_cb->htt.frag_len + skb_cb->htt.pad_len);
435 } else {
436 skb_cb->htt.frag_len = 0;
437 skb_cb->htt.pad_len = 0;
438 }
439
440 res = ath10k_skb_map(dev, msdu);
441 if (res)
442 goto err_pull_txfrag;
443
444 if (use_frags) {
445 dma_sync_single_for_cpu(dev, skb_cb->paddr, msdu->len,
446 DMA_TO_DEVICE);
447
448 /* tx fragment list must be terminated with zero-entry */
449 tx_frags = (struct htt_data_tx_desc_frag *)msdu->data;
450 tx_frags[0].paddr = __cpu_to_le32(skb_cb->paddr +
451 skb_cb->htt.frag_len +
452 skb_cb->htt.pad_len);
453 tx_frags[0].len = __cpu_to_le32(msdu->len -
454 skb_cb->htt.frag_len -
455 skb_cb->htt.pad_len);
456 tx_frags[1].paddr = __cpu_to_le32(0);
457 tx_frags[1].len = __cpu_to_le32(0);
458
459 dma_sync_single_for_device(dev, skb_cb->paddr, msdu->len,
460 DMA_TO_DEVICE);
461 }
462
463 ath10k_dbg(ATH10K_DBG_HTT, "msdu 0x%llx\n",
464 (unsigned long long) ATH10K_SKB_CB(msdu)->paddr);
465 ath10k_dbg_dump(ATH10K_DBG_HTT_DUMP, NULL, "msdu: ",
466 msdu->data, msdu->len);
467
468 skb_put(txdesc, desc_len);
469 cmd = (struct htt_cmd *)txdesc->data;
470
471 tid = ATH10K_SKB_CB(msdu)->htt.tid;
472
473 ath10k_dbg(ATH10K_DBG_HTT, "htt data tx using tid %hhu\n", tid);
474
475 flags0 = 0;
476 if (!ieee80211_has_protected(hdr->frame_control))
477 flags0 |= HTT_DATA_TX_DESC_FLAGS0_NO_ENCRYPT;
478 flags0 |= HTT_DATA_TX_DESC_FLAGS0_MAC_HDR_PRESENT;
479
480 if (use_frags)
481 flags0 |= SM(ATH10K_HW_TXRX_NATIVE_WIFI,
482 HTT_DATA_TX_DESC_FLAGS0_PKT_TYPE);
483 else
484 flags0 |= SM(ATH10K_HW_TXRX_MGMT,
485 HTT_DATA_TX_DESC_FLAGS0_PKT_TYPE);
486
487 flags1 = 0;
488 flags1 |= SM((u16)vdev_id, HTT_DATA_TX_DESC_FLAGS1_VDEV_ID);
489 flags1 |= SM((u16)tid, HTT_DATA_TX_DESC_FLAGS1_EXT_TID);
490 flags1 |= HTT_DATA_TX_DESC_FLAGS1_CKSUM_L3_OFFLOAD;
491 flags1 |= HTT_DATA_TX_DESC_FLAGS1_CKSUM_L4_OFFLOAD;
492
493 cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_TX_FRM;
494 cmd->data_tx.flags0 = flags0;
495 cmd->data_tx.flags1 = __cpu_to_le16(flags1);
496 cmd->data_tx.len = __cpu_to_le16(msdu->len -
497 skb_cb->htt.frag_len -
498 skb_cb->htt.pad_len);
499 cmd->data_tx.id = __cpu_to_le16(msdu_id);
500 cmd->data_tx.frags_paddr = __cpu_to_le32(skb_cb->paddr);
501 cmd->data_tx.peerid = __cpu_to_le32(HTT_INVALID_PEERID);
502
503 memcpy(cmd->data_tx.prefetch, hdr, prefetch_len);
504
505 res = ath10k_htc_send(&htt->ar->htc, htt->eid, txdesc);
506 if (res)
507 goto err_unmap_msdu;
508
509 return 0;
510
511 err_unmap_msdu:
512 ath10k_skb_unmap(dev, msdu);
513 err_pull_txfrag:
514 skb_pull(msdu, skb_cb->htt.frag_len + skb_cb->htt.pad_len);
515 err_free_txdesc:
516 dev_kfree_skb_any(txdesc);
517 err_free_msdu_id:
518 spin_lock_bh(&htt->tx_lock);
519 htt->pending_tx[msdu_id] = NULL;
520 ath10k_htt_tx_free_msdu_id(htt, msdu_id);
521 spin_unlock_bh(&htt->tx_lock);
522 err_tx_dec:
523 ath10k_htt_tx_dec_pending(htt);
524 err:
525 return res;
526 }
Linux with added FPC-III support