2 * Copyright (c) 2005-2011 Atheros Communications Inc.
3 * Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
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.
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.
18 #include <linux/etherdevice.h>
25 void __ath10k_htt_tx_dec_pending(struct ath10k_htt *htt)
27 htt->num_pending_tx--;
28 if (htt->num_pending_tx == htt->max_num_pending_tx - 1)
29 ieee80211_wake_queues(htt->ar->hw);
32 static void ath10k_htt_tx_dec_pending(struct ath10k_htt *htt)
34 spin_lock_bh(&htt->tx_lock);
35 __ath10k_htt_tx_dec_pending(htt);
36 spin_unlock_bh(&htt->tx_lock);
39 static int ath10k_htt_tx_inc_pending(struct ath10k_htt *htt)
43 spin_lock_bh(&htt->tx_lock);
45 if (htt->num_pending_tx >= htt->max_num_pending_tx) {
50 htt->num_pending_tx++;
51 if (htt->num_pending_tx == htt->max_num_pending_tx)
52 ieee80211_stop_queues(htt->ar->hw);
55 spin_unlock_bh(&htt->tx_lock);
59 int ath10k_htt_tx_alloc_msdu_id(struct ath10k_htt *htt)
63 lockdep_assert_held(&htt->tx_lock);
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)
70 ath10k_dbg(ATH10K_DBG_HTT, "htt tx alloc msdu_id %d\n", msdu_id);
71 __set_bit(msdu_id, htt->used_msdu_ids);
75 void ath10k_htt_tx_free_msdu_id(struct ath10k_htt *htt, u16 msdu_id)
77 lockdep_assert_held(&htt->tx_lock);
79 if (!test_bit(msdu_id, htt->used_msdu_ids))
80 ath10k_warn("trying to free unallocated msdu_id %d\n", msdu_id);
82 ath10k_dbg(ATH10K_DBG_HTT, "htt tx free msdu_id %hu\n", msdu_id);
83 __clear_bit(msdu_id, htt->used_msdu_ids);
86 int ath10k_htt_tx_attach(struct ath10k_htt *htt)
90 spin_lock_init(&htt->tx_lock);
91 init_waitqueue_head(&htt->empty_tx_wq);
93 /* At the beginning free queue number should hint us the maximum
95 pipe = htt->ar->htc.endpoint[htt->eid].ul_pipe_id;
96 htt->max_num_pending_tx = ath10k_hif_get_free_queue_number(htt->ar,
99 ath10k_dbg(ATH10K_DBG_HTT, "htt tx max num pending tx %d\n",
100 htt->max_num_pending_tx);
102 htt->pending_tx = kzalloc(sizeof(*htt->pending_tx) *
103 htt->max_num_pending_tx, GFP_KERNEL);
104 if (!htt->pending_tx)
107 htt->used_msdu_ids = kzalloc(sizeof(unsigned long) *
108 BITS_TO_LONGS(htt->max_num_pending_tx),
110 if (!htt->used_msdu_ids) {
111 kfree(htt->pending_tx);
118 static void ath10k_htt_tx_cleanup_pending(struct ath10k_htt *htt)
120 struct sk_buff *txdesc;
123 /* No locks needed. Called after communication with the device has
126 for (msdu_id = 0; msdu_id < htt->max_num_pending_tx; msdu_id++) {
127 if (!test_bit(msdu_id, htt->used_msdu_ids))
130 txdesc = htt->pending_tx[msdu_id];
134 ath10k_dbg(ATH10K_DBG_HTT, "force cleanup msdu_id %hu\n",
137 if (ATH10K_SKB_CB(txdesc)->htt.refcount > 0)
138 ATH10K_SKB_CB(txdesc)->htt.refcount = 1;
140 ATH10K_SKB_CB(txdesc)->htt.discard = true;
141 ath10k_txrx_tx_unref(htt, txdesc);
145 void ath10k_htt_tx_detach(struct ath10k_htt *htt)
147 ath10k_htt_tx_cleanup_pending(htt);
148 kfree(htt->pending_tx);
149 kfree(htt->used_msdu_ids);
153 void ath10k_htt_htc_tx_complete(struct ath10k *ar, struct sk_buff *skb)
155 struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
156 struct ath10k_htt *htt = &ar->htt;
158 if (skb_cb->htt.is_conf) {
159 dev_kfree_skb_any(skb);
163 if (skb_cb->is_aborted) {
164 skb_cb->htt.discard = true;
166 /* if the skbuff is aborted we need to make sure we'll free up
167 * the tx resources, we can't simply run tx_unref() 2 times
168 * because if htt tx completion came in earlier we'd access
169 * unallocated memory */
170 if (skb_cb->htt.refcount > 1)
171 skb_cb->htt.refcount = 1;
174 ath10k_txrx_tx_unref(htt, skb);
177 int ath10k_htt_h2t_ver_req_msg(struct ath10k_htt *htt)
184 len += sizeof(cmd->hdr);
185 len += sizeof(cmd->ver_req);
187 skb = ath10k_htc_alloc_skb(len);
192 cmd = (struct htt_cmd *)skb->data;
193 cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_VERSION_REQ;
195 ATH10K_SKB_CB(skb)->htt.is_conf = true;
197 ret = ath10k_htc_send(&htt->ar->htc, htt->eid, skb);
199 dev_kfree_skb_any(skb);
206 int ath10k_htt_send_rx_ring_cfg_ll(struct ath10k_htt *htt)
210 struct htt_rx_ring_setup_ring *ring;
211 const int num_rx_ring = 1;
218 * the HW expects the buffer to be an integral number of 4-byte
221 BUILD_BUG_ON(!IS_ALIGNED(HTT_RX_BUF_SIZE, 4));
222 BUILD_BUG_ON((HTT_RX_BUF_SIZE & HTT_MAX_CACHE_LINE_SIZE_MASK) != 0);
224 len = sizeof(cmd->hdr) + sizeof(cmd->rx_setup.hdr)
225 + (sizeof(*ring) * num_rx_ring);
226 skb = ath10k_htc_alloc_skb(len);
232 cmd = (struct htt_cmd *)skb->data;
233 ring = &cmd->rx_setup.rings[0];
235 cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_RX_RING_CFG;
236 cmd->rx_setup.hdr.num_rings = 1;
238 /* FIXME: do we need all of this? */
240 flags |= HTT_RX_RING_FLAGS_MAC80211_HDR;
241 flags |= HTT_RX_RING_FLAGS_MSDU_PAYLOAD;
242 flags |= HTT_RX_RING_FLAGS_PPDU_START;
243 flags |= HTT_RX_RING_FLAGS_PPDU_END;
244 flags |= HTT_RX_RING_FLAGS_MPDU_START;
245 flags |= HTT_RX_RING_FLAGS_MPDU_END;
246 flags |= HTT_RX_RING_FLAGS_MSDU_START;
247 flags |= HTT_RX_RING_FLAGS_MSDU_END;
248 flags |= HTT_RX_RING_FLAGS_RX_ATTENTION;
249 flags |= HTT_RX_RING_FLAGS_FRAG_INFO;
250 flags |= HTT_RX_RING_FLAGS_UNICAST_RX;
251 flags |= HTT_RX_RING_FLAGS_MULTICAST_RX;
252 flags |= HTT_RX_RING_FLAGS_CTRL_RX;
253 flags |= HTT_RX_RING_FLAGS_MGMT_RX;
254 flags |= HTT_RX_RING_FLAGS_NULL_RX;
255 flags |= HTT_RX_RING_FLAGS_PHY_DATA_RX;
257 fw_idx = __le32_to_cpu(*htt->rx_ring.alloc_idx.vaddr);
259 ring->fw_idx_shadow_reg_paddr =
260 __cpu_to_le32(htt->rx_ring.alloc_idx.paddr);
261 ring->rx_ring_base_paddr = __cpu_to_le32(htt->rx_ring.base_paddr);
262 ring->rx_ring_len = __cpu_to_le16(htt->rx_ring.size);
263 ring->rx_ring_bufsize = __cpu_to_le16(HTT_RX_BUF_SIZE);
264 ring->flags = __cpu_to_le16(flags);
265 ring->fw_idx_init_val = __cpu_to_le16(fw_idx);
267 #define desc_offset(x) (offsetof(struct htt_rx_desc, x) / 4)
269 ring->mac80211_hdr_offset = __cpu_to_le16(desc_offset(rx_hdr_status));
270 ring->msdu_payload_offset = __cpu_to_le16(desc_offset(msdu_payload));
271 ring->ppdu_start_offset = __cpu_to_le16(desc_offset(ppdu_start));
272 ring->ppdu_end_offset = __cpu_to_le16(desc_offset(ppdu_end));
273 ring->mpdu_start_offset = __cpu_to_le16(desc_offset(mpdu_start));
274 ring->mpdu_end_offset = __cpu_to_le16(desc_offset(mpdu_end));
275 ring->msdu_start_offset = __cpu_to_le16(desc_offset(msdu_start));
276 ring->msdu_end_offset = __cpu_to_le16(desc_offset(msdu_end));
277 ring->rx_attention_offset = __cpu_to_le16(desc_offset(attention));
278 ring->frag_info_offset = __cpu_to_le16(desc_offset(frag_info));
282 ATH10K_SKB_CB(skb)->htt.is_conf = true;
284 ret = ath10k_htc_send(&htt->ar->htc, htt->eid, skb);
286 dev_kfree_skb_any(skb);
293 int ath10k_htt_mgmt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
295 struct device *dev = htt->ar->dev;
296 struct ath10k_skb_cb *skb_cb;
297 struct sk_buff *txdesc = NULL;
299 u8 vdev_id = ATH10K_SKB_CB(msdu)->htt.vdev_id;
305 res = ath10k_htt_tx_inc_pending(htt);
309 len += sizeof(cmd->hdr);
310 len += sizeof(cmd->mgmt_tx);
312 txdesc = ath10k_htc_alloc_skb(len);
318 spin_lock_bh(&htt->tx_lock);
319 msdu_id = ath10k_htt_tx_alloc_msdu_id(htt);
321 spin_unlock_bh(&htt->tx_lock);
325 htt->pending_tx[msdu_id] = txdesc;
326 spin_unlock_bh(&htt->tx_lock);
328 res = ath10k_skb_map(dev, msdu);
332 skb_put(txdesc, len);
333 cmd = (struct htt_cmd *)txdesc->data;
334 cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_MGMT_TX;
335 cmd->mgmt_tx.msdu_paddr = __cpu_to_le32(ATH10K_SKB_CB(msdu)->paddr);
336 cmd->mgmt_tx.len = __cpu_to_le32(msdu->len);
337 cmd->mgmt_tx.desc_id = __cpu_to_le32(msdu_id);
338 cmd->mgmt_tx.vdev_id = __cpu_to_le32(vdev_id);
339 memcpy(cmd->mgmt_tx.hdr, msdu->data,
340 min_t(int, msdu->len, HTT_MGMT_FRM_HDR_DOWNLOAD_LEN));
342 /* refcount is decremented by HTC and HTT completions until it reaches
343 * zero and is freed */
344 skb_cb = ATH10K_SKB_CB(txdesc);
345 skb_cb->htt.msdu_id = msdu_id;
346 skb_cb->htt.refcount = 2;
347 skb_cb->htt.msdu = msdu;
349 res = ath10k_htc_send(&htt->ar->htc, htt->eid, txdesc);
356 ath10k_skb_unmap(dev, msdu);
359 dev_kfree_skb_any(txdesc);
361 spin_lock_bh(&htt->tx_lock);
362 htt->pending_tx[msdu_id] = NULL;
363 ath10k_htt_tx_free_msdu_id(htt, msdu_id);
364 spin_unlock_bh(&htt->tx_lock);
366 ath10k_htt_tx_dec_pending(htt);
370 int ath10k_htt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
372 struct device *dev = htt->ar->dev;
374 struct htt_data_tx_desc_frag *tx_frags;
375 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)msdu->data;
376 struct ath10k_skb_cb *skb_cb;
377 struct sk_buff *txdesc = NULL;
378 struct sk_buff *txfrag = NULL;
379 u8 vdev_id = ATH10K_SKB_CB(msdu)->htt.vdev_id;
381 int prefetch_len, desc_len, frag_len;
382 dma_addr_t frags_paddr;
388 res = ath10k_htt_tx_inc_pending(htt);
392 prefetch_len = min(htt->prefetch_len, msdu->len);
393 prefetch_len = roundup(prefetch_len, 4);
395 desc_len = sizeof(cmd->hdr) + sizeof(cmd->data_tx) + prefetch_len;
396 frag_len = sizeof(*tx_frags) * 2;
398 txdesc = ath10k_htc_alloc_skb(desc_len);
404 /* Since HTT 3.0 there is no separate mgmt tx command. However in case
405 * of mgmt tx using TX_FRM there is not tx fragment list. Instead of tx
406 * fragment list host driver specifies directly frame pointer. */
407 if (htt->target_version_major < 3 ||
408 !ieee80211_is_mgmt(hdr->frame_control)) {
409 txfrag = dev_alloc_skb(frag_len);
416 if (!IS_ALIGNED((unsigned long)txdesc->data, 4)) {
417 ath10k_warn("htt alignment check failed. dropping packet.\n");
422 spin_lock_bh(&htt->tx_lock);
423 msdu_id = ath10k_htt_tx_alloc_msdu_id(htt);
425 spin_unlock_bh(&htt->tx_lock);
429 htt->pending_tx[msdu_id] = txdesc;
430 spin_unlock_bh(&htt->tx_lock);
432 res = ath10k_skb_map(dev, msdu);
436 /* Since HTT 3.0 there is no separate mgmt tx command. However in case
437 * of mgmt tx using TX_FRM there is not tx fragment list. Instead of tx
438 * fragment list host driver specifies directly frame pointer. */
439 if (htt->target_version_major < 3 ||
440 !ieee80211_is_mgmt(hdr->frame_control)) {
441 /* tx fragment list must be terminated with zero-entry */
442 skb_put(txfrag, frag_len);
443 tx_frags = (struct htt_data_tx_desc_frag *)txfrag->data;
444 tx_frags[0].paddr = __cpu_to_le32(ATH10K_SKB_CB(msdu)->paddr);
445 tx_frags[0].len = __cpu_to_le32(msdu->len);
446 tx_frags[1].paddr = __cpu_to_le32(0);
447 tx_frags[1].len = __cpu_to_le32(0);
449 res = ath10k_skb_map(dev, txfrag);
453 ath10k_dbg(ATH10K_DBG_HTT, "txfrag 0x%llx\n",
454 (unsigned long long) ATH10K_SKB_CB(txfrag)->paddr);
455 ath10k_dbg_dump(ATH10K_DBG_HTT_DUMP, NULL, "txfrag: ",
456 txfrag->data, frag_len);
459 ath10k_dbg(ATH10K_DBG_HTT, "msdu 0x%llx\n",
460 (unsigned long long) ATH10K_SKB_CB(msdu)->paddr);
461 ath10k_dbg_dump(ATH10K_DBG_HTT_DUMP, NULL, "msdu: ",
462 msdu->data, msdu->len);
464 skb_put(txdesc, desc_len);
465 cmd = (struct htt_cmd *)txdesc->data;
466 memset(cmd, 0, desc_len);
468 tid = ATH10K_SKB_CB(msdu)->htt.tid;
470 ath10k_dbg(ATH10K_DBG_HTT, "htt data tx using tid %hhu\n", tid);
473 if (!ieee80211_has_protected(hdr->frame_control))
474 flags0 |= HTT_DATA_TX_DESC_FLAGS0_NO_ENCRYPT;
475 flags0 |= HTT_DATA_TX_DESC_FLAGS0_MAC_HDR_PRESENT;
477 /* Since HTT 3.0 there is no separate mgmt tx command. However in case
478 * of mgmt tx using TX_FRM there is not tx fragment list. Instead of tx
479 * fragment list host driver specifies directly frame pointer. */
480 if (htt->target_version_major >= 3 &&
481 ieee80211_is_mgmt(hdr->frame_control))
482 flags0 |= SM(ATH10K_HW_TXRX_MGMT,
483 HTT_DATA_TX_DESC_FLAGS0_PKT_TYPE);
485 flags0 |= SM(ATH10K_HW_TXRX_NATIVE_WIFI,
486 HTT_DATA_TX_DESC_FLAGS0_PKT_TYPE);
489 flags1 |= SM((u16)vdev_id, HTT_DATA_TX_DESC_FLAGS1_VDEV_ID);
490 flags1 |= SM((u16)tid, HTT_DATA_TX_DESC_FLAGS1_EXT_TID);
491 flags1 |= HTT_DATA_TX_DESC_FLAGS1_CKSUM_L3_OFFLOAD;
492 flags1 |= HTT_DATA_TX_DESC_FLAGS1_CKSUM_L4_OFFLOAD;
494 /* Since HTT 3.0 there is no separate mgmt tx command. However in case
495 * of mgmt tx using TX_FRM there is not tx fragment list. Instead of tx
496 * fragment list host driver specifies directly frame pointer. */
497 if (htt->target_version_major >= 3 &&
498 ieee80211_is_mgmt(hdr->frame_control))
499 frags_paddr = ATH10K_SKB_CB(msdu)->paddr;
501 frags_paddr = ATH10K_SKB_CB(txfrag)->paddr;
503 cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_TX_FRM;
504 cmd->data_tx.flags0 = flags0;
505 cmd->data_tx.flags1 = __cpu_to_le16(flags1);
506 cmd->data_tx.len = __cpu_to_le16(msdu->len);
507 cmd->data_tx.id = __cpu_to_le16(msdu_id);
508 cmd->data_tx.frags_paddr = __cpu_to_le32(frags_paddr);
509 cmd->data_tx.peerid = __cpu_to_le32(HTT_INVALID_PEERID);
511 memcpy(cmd->data_tx.prefetch, msdu->data, prefetch_len);
513 /* refcount is decremented by HTC and HTT completions until it reaches
514 * zero and is freed */
515 skb_cb = ATH10K_SKB_CB(txdesc);
516 skb_cb->htt.msdu_id = msdu_id;
517 skb_cb->htt.refcount = 2;
518 skb_cb->htt.txfrag = txfrag;
519 skb_cb->htt.msdu = msdu;
521 res = ath10k_htc_send(&htt->ar->htc, htt->eid, txdesc);
528 ath10k_skb_unmap(dev, txfrag);
530 dev_kfree_skb_any(txdesc);
532 dev_kfree_skb_any(txfrag);
534 spin_lock_bh(&htt->tx_lock);
535 htt->pending_tx[msdu_id] = NULL;
536 ath10k_htt_tx_free_msdu_id(htt, msdu_id);
537 spin_unlock_bh(&htt->tx_lock);
539 ath10k_htt_tx_dec_pending(htt);
540 ath10k_skb_unmap(dev, msdu);