Vladimir Kondratiev | 02525a7 | 2014-08-06 10:31:51 +0300 | [diff] [blame] | 1 | /* |
Vladimir Kondratiev | 382afc3 | 2015-01-25 10:52:51 +0200 | [diff] [blame] | 2 | * Copyright (c) 2014-2015 Qualcomm Atheros, Inc. |
Vladimir Kondratiev | 02525a7 | 2014-08-06 10:31:51 +0300 | [diff] [blame] | 3 | * |
| 4 | * Permission to use, copy, modify, and/or distribute this software for any |
| 5 | * purpose with or without fee is hereby granted, provided that the above |
| 6 | * copyright notice and this permission notice appear in all copies. |
| 7 | * |
| 8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 15 | */ |
| 16 | |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 17 | #include "wil6210.h" |
| 18 | #include "txrx.h" |
| 19 | |
| 20 | #define SEQ_MODULO 0x1000 |
| 21 | #define SEQ_MASK 0xfff |
| 22 | |
| 23 | static inline int seq_less(u16 sq1, u16 sq2) |
| 24 | { |
| 25 | return ((sq1 - sq2) & SEQ_MASK) > (SEQ_MODULO >> 1); |
| 26 | } |
| 27 | |
| 28 | static inline u16 seq_inc(u16 sq) |
| 29 | { |
| 30 | return (sq + 1) & SEQ_MASK; |
| 31 | } |
| 32 | |
| 33 | static inline u16 seq_sub(u16 sq1, u16 sq2) |
| 34 | { |
| 35 | return (sq1 - sq2) & SEQ_MASK; |
| 36 | } |
| 37 | |
| 38 | static inline int reorder_index(struct wil_tid_ampdu_rx *r, u16 seq) |
| 39 | { |
| 40 | return seq_sub(seq, r->ssn) % r->buf_size; |
| 41 | } |
| 42 | |
| 43 | static void wil_release_reorder_frame(struct wil6210_priv *wil, |
| 44 | struct wil_tid_ampdu_rx *r, |
| 45 | int index) |
| 46 | { |
| 47 | struct net_device *ndev = wil_to_ndev(wil); |
| 48 | struct sk_buff *skb = r->reorder_buf[index]; |
| 49 | |
| 50 | if (!skb) |
| 51 | goto no_frame; |
| 52 | |
| 53 | /* release the frame from the reorder ring buffer */ |
| 54 | r->stored_mpdu_num--; |
| 55 | r->reorder_buf[index] = NULL; |
| 56 | wil_netif_rx_any(skb, ndev); |
| 57 | |
| 58 | no_frame: |
| 59 | r->head_seq_num = seq_inc(r->head_seq_num); |
| 60 | } |
| 61 | |
| 62 | static void wil_release_reorder_frames(struct wil6210_priv *wil, |
| 63 | struct wil_tid_ampdu_rx *r, |
| 64 | u16 hseq) |
| 65 | { |
| 66 | int index; |
| 67 | |
Vladimir Kondratiev | cf42c4e | 2014-05-27 14:45:50 +0300 | [diff] [blame] | 68 | /* note: this function is never called with |
| 69 | * hseq preceding r->head_seq_num, i.e it is always true |
| 70 | * !seq_less(hseq, r->head_seq_num) |
| 71 | * and thus on loop exit it should be |
| 72 | * r->head_seq_num == hseq |
| 73 | */ |
| 74 | while (seq_less(r->head_seq_num, hseq) && r->stored_mpdu_num) { |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 75 | index = reorder_index(r, r->head_seq_num); |
| 76 | wil_release_reorder_frame(wil, r, index); |
| 77 | } |
Vladimir Kondratiev | cf42c4e | 2014-05-27 14:45:50 +0300 | [diff] [blame] | 78 | r->head_seq_num = hseq; |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 79 | } |
| 80 | |
| 81 | static void wil_reorder_release(struct wil6210_priv *wil, |
| 82 | struct wil_tid_ampdu_rx *r) |
| 83 | { |
| 84 | int index = reorder_index(r, r->head_seq_num); |
| 85 | |
| 86 | while (r->reorder_buf[index]) { |
| 87 | wil_release_reorder_frame(wil, r, index); |
| 88 | index = reorder_index(r, r->head_seq_num); |
| 89 | } |
| 90 | } |
| 91 | |
Vladimir Kondratiev | bd33273 | 2014-12-23 09:47:24 +0200 | [diff] [blame] | 92 | /* called in NAPI context */ |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 93 | void wil_rx_reorder(struct wil6210_priv *wil, struct sk_buff *skb) |
Vladimir Kondratiev | bd33273 | 2014-12-23 09:47:24 +0200 | [diff] [blame] | 94 | __acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock) |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 95 | { |
| 96 | struct net_device *ndev = wil_to_ndev(wil); |
| 97 | struct vring_rx_desc *d = wil_skb_rxdesc(skb); |
| 98 | int tid = wil_rxdesc_tid(d); |
| 99 | int cid = wil_rxdesc_cid(d); |
| 100 | int mid = wil_rxdesc_mid(d); |
| 101 | u16 seq = wil_rxdesc_seq(d); |
Vladimir Kondratiev | e4373d8 | 2014-12-23 09:47:21 +0200 | [diff] [blame] | 102 | int mcast = wil_rxdesc_mcast(d); |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 103 | struct wil_sta_info *sta = &wil->sta[cid]; |
Dedy Lansky | ec81b5a | 2014-09-10 16:34:42 +0300 | [diff] [blame] | 104 | struct wil_tid_ampdu_rx *r; |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 105 | u16 hseq; |
| 106 | int index; |
| 107 | |
Vladimir Kondratiev | e4373d8 | 2014-12-23 09:47:21 +0200 | [diff] [blame] | 108 | wil_dbg_txrx(wil, "MID %d CID %d TID %d Seq 0x%03x mcast %01x\n", |
| 109 | mid, cid, tid, seq, mcast); |
| 110 | |
| 111 | if (unlikely(mcast)) { |
| 112 | wil_netif_rx_any(skb, ndev); |
| 113 | return; |
| 114 | } |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 115 | |
Vladimir Kondratiev | bd33273 | 2014-12-23 09:47:24 +0200 | [diff] [blame] | 116 | spin_lock(&sta->tid_rx_lock); |
Dedy Lansky | ec81b5a | 2014-09-10 16:34:42 +0300 | [diff] [blame] | 117 | |
| 118 | r = sta->tid_rx[tid]; |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 119 | if (!r) { |
| 120 | wil_netif_rx_any(skb, ndev); |
Vladimir Kondratiev | bd33273 | 2014-12-23 09:47:24 +0200 | [diff] [blame] | 121 | goto out; |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 122 | } |
| 123 | |
Vladimir Kondratiev | 91a8edc | 2015-07-30 13:52:01 +0300 | [diff] [blame] | 124 | r->total++; |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 125 | hseq = r->head_seq_num; |
| 126 | |
Vladimir Kondratiev | c888cdd | 2014-04-08 11:36:18 +0300 | [diff] [blame] | 127 | /** Due to the race between WMI events, where BACK establishment |
| 128 | * reported, and data Rx, few packets may be pass up before reorder |
| 129 | * buffer get allocated. Catch up by pretending SSN is what we |
| 130 | * see in the 1-st Rx packet |
Vladimir Kondratiev | ff7c5c3 | 2014-12-23 09:47:23 +0200 | [diff] [blame] | 131 | * |
| 132 | * Another scenario, Rx get delayed and we got packet from before |
| 133 | * BACK. Pass it to the stack and wait. |
Vladimir Kondratiev | c888cdd | 2014-04-08 11:36:18 +0300 | [diff] [blame] | 134 | */ |
| 135 | if (r->first_time) { |
| 136 | r->first_time = false; |
| 137 | if (seq != r->head_seq_num) { |
Vladimir Kondratiev | ff7c5c3 | 2014-12-23 09:47:23 +0200 | [diff] [blame] | 138 | if (seq_less(seq, r->head_seq_num)) { |
| 139 | wil_err(wil, |
| 140 | "Error: frame with early sequence 0x%03x, should be 0x%03x. Waiting...\n", |
| 141 | seq, r->head_seq_num); |
| 142 | r->first_time = true; |
| 143 | wil_netif_rx_any(skb, ndev); |
| 144 | goto out; |
| 145 | } |
| 146 | wil_err(wil, |
| 147 | "Error: 1-st frame with wrong sequence 0x%03x, should be 0x%03x. Fixing...\n", |
| 148 | seq, r->head_seq_num); |
Vladimir Kondratiev | c888cdd | 2014-04-08 11:36:18 +0300 | [diff] [blame] | 149 | r->head_seq_num = seq; |
| 150 | r->ssn = seq; |
| 151 | } |
| 152 | } |
| 153 | |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 154 | /* frame with out of date sequence number */ |
| 155 | if (seq_less(seq, r->head_seq_num)) { |
Vladimir Kondratiev | d5b1c32 | 2014-06-16 19:37:07 +0300 | [diff] [blame] | 156 | r->ssn_last_drop = seq; |
Vladimir Kondratiev | 91a8edc | 2015-07-30 13:52:01 +0300 | [diff] [blame] | 157 | r->drop_old++; |
| 158 | wil_dbg_txrx(wil, "Rx drop: old seq 0x%03x head 0x%03x\n", |
| 159 | seq, r->head_seq_num); |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 160 | dev_kfree_skb(skb); |
| 161 | goto out; |
| 162 | } |
| 163 | |
| 164 | /* |
| 165 | * If frame the sequence number exceeds our buffering window |
| 166 | * size release some previous frames to make room for this one. |
| 167 | */ |
| 168 | if (!seq_less(seq, r->head_seq_num + r->buf_size)) { |
| 169 | hseq = seq_inc(seq_sub(seq, r->buf_size)); |
| 170 | /* release stored frames up to new head to stack */ |
| 171 | wil_release_reorder_frames(wil, r, hseq); |
| 172 | } |
| 173 | |
| 174 | /* Now the new frame is always in the range of the reordering buffer */ |
| 175 | |
| 176 | index = reorder_index(r, seq); |
| 177 | |
| 178 | /* check if we already stored this frame */ |
| 179 | if (r->reorder_buf[index]) { |
Vladimir Kondratiev | 91a8edc | 2015-07-30 13:52:01 +0300 | [diff] [blame] | 180 | r->drop_dup++; |
| 181 | wil_dbg_txrx(wil, "Rx drop: dup seq 0x%03x\n", seq); |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 182 | dev_kfree_skb(skb); |
| 183 | goto out; |
| 184 | } |
| 185 | |
| 186 | /* |
| 187 | * If the current MPDU is in the right order and nothing else |
| 188 | * is stored we can process it directly, no need to buffer it. |
| 189 | * If it is first but there's something stored, we may be able |
| 190 | * to release frames after this one. |
| 191 | */ |
| 192 | if (seq == r->head_seq_num && r->stored_mpdu_num == 0) { |
| 193 | r->head_seq_num = seq_inc(r->head_seq_num); |
| 194 | wil_netif_rx_any(skb, ndev); |
| 195 | goto out; |
| 196 | } |
| 197 | |
| 198 | /* put the frame in the reordering buffer */ |
| 199 | r->reorder_buf[index] = skb; |
| 200 | r->reorder_time[index] = jiffies; |
| 201 | r->stored_mpdu_num++; |
| 202 | wil_reorder_release(wil, r); |
| 203 | |
| 204 | out: |
Vladimir Kondratiev | bd33273 | 2014-12-23 09:47:24 +0200 | [diff] [blame] | 205 | spin_unlock(&sta->tid_rx_lock); |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 206 | } |
| 207 | |
Vladimir Kondratiev | a831334 | 2015-10-04 10:23:23 +0300 | [diff] [blame] | 208 | /* process BAR frame, called in NAPI context */ |
| 209 | void wil_rx_bar(struct wil6210_priv *wil, u8 cid, u8 tid, u16 seq) |
| 210 | { |
| 211 | struct wil_sta_info *sta = &wil->sta[cid]; |
| 212 | struct wil_tid_ampdu_rx *r; |
| 213 | |
| 214 | spin_lock(&sta->tid_rx_lock); |
| 215 | |
| 216 | r = sta->tid_rx[tid]; |
| 217 | if (!r) { |
| 218 | wil_err(wil, "BAR for non-existing CID %d TID %d\n", cid, tid); |
| 219 | goto out; |
| 220 | } |
| 221 | if (seq_less(seq, r->head_seq_num)) { |
| 222 | wil_err(wil, "BAR Seq 0x%03x preceding head 0x%03x\n", |
| 223 | seq, r->head_seq_num); |
| 224 | goto out; |
| 225 | } |
| 226 | wil_dbg_txrx(wil, "BAR: CID %d TID %d Seq 0x%03x head 0x%03x\n", |
| 227 | cid, tid, seq, r->head_seq_num); |
| 228 | wil_release_reorder_frames(wil, r, seq); |
| 229 | |
| 230 | out: |
| 231 | spin_unlock(&sta->tid_rx_lock); |
| 232 | } |
| 233 | |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 234 | struct wil_tid_ampdu_rx *wil_tid_ampdu_rx_alloc(struct wil6210_priv *wil, |
| 235 | int size, u16 ssn) |
| 236 | { |
| 237 | struct wil_tid_ampdu_rx *r = kzalloc(sizeof(*r), GFP_KERNEL); |
Vladimir Kondratiev | 8fe5962 | 2014-09-10 16:34:34 +0300 | [diff] [blame] | 238 | |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 239 | if (!r) |
| 240 | return NULL; |
| 241 | |
| 242 | r->reorder_buf = |
| 243 | kcalloc(size, sizeof(struct sk_buff *), GFP_KERNEL); |
| 244 | r->reorder_time = |
| 245 | kcalloc(size, sizeof(unsigned long), GFP_KERNEL); |
| 246 | if (!r->reorder_buf || !r->reorder_time) { |
| 247 | kfree(r->reorder_buf); |
| 248 | kfree(r->reorder_time); |
| 249 | kfree(r); |
| 250 | return NULL; |
| 251 | } |
| 252 | |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 253 | r->ssn = ssn; |
| 254 | r->head_seq_num = ssn; |
| 255 | r->buf_size = size; |
| 256 | r->stored_mpdu_num = 0; |
Vladimir Kondratiev | c888cdd | 2014-04-08 11:36:18 +0300 | [diff] [blame] | 257 | r->first_time = true; |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 258 | return r; |
| 259 | } |
| 260 | |
| 261 | void wil_tid_ampdu_rx_free(struct wil6210_priv *wil, |
| 262 | struct wil_tid_ampdu_rx *r) |
| 263 | { |
| 264 | if (!r) |
| 265 | return; |
| 266 | wil_release_reorder_frames(wil, r, r->head_seq_num + r->buf_size); |
| 267 | kfree(r->reorder_buf); |
| 268 | kfree(r->reorder_time); |
| 269 | kfree(r); |
| 270 | } |
Vladimir Kondratiev | 3277213 | 2014-12-23 09:47:03 +0200 | [diff] [blame] | 271 | |
| 272 | /* ADDBA processing */ |
| 273 | static u16 wil_agg_size(struct wil6210_priv *wil, u16 req_agg_wsize) |
| 274 | { |
| 275 | u16 max_agg_size = min_t(u16, WIL_MAX_AGG_WSIZE, WIL_MAX_AMPDU_SIZE / |
| 276 | (mtu_max + WIL_MAX_MPDU_OVERHEAD)); |
| 277 | |
| 278 | if (!req_agg_wsize) |
| 279 | return max_agg_size; |
| 280 | |
| 281 | return min(max_agg_size, req_agg_wsize); |
| 282 | } |
| 283 | |
| 284 | /* Block Ack - Rx side (recipient */ |
| 285 | int wil_addba_rx_request(struct wil6210_priv *wil, u8 cidxtid, |
| 286 | u8 dialog_token, __le16 ba_param_set, |
| 287 | __le16 ba_timeout, __le16 ba_seq_ctrl) |
| 288 | { |
| 289 | struct wil_back_rx *req = kzalloc(sizeof(*req), GFP_KERNEL); |
| 290 | |
| 291 | if (!req) |
| 292 | return -ENOMEM; |
| 293 | |
| 294 | req->cidxtid = cidxtid; |
| 295 | req->dialog_token = dialog_token; |
| 296 | req->ba_param_set = le16_to_cpu(ba_param_set); |
| 297 | req->ba_timeout = le16_to_cpu(ba_timeout); |
| 298 | req->ba_seq_ctrl = le16_to_cpu(ba_seq_ctrl); |
| 299 | |
| 300 | mutex_lock(&wil->back_rx_mutex); |
| 301 | list_add_tail(&req->list, &wil->back_rx_pending); |
| 302 | mutex_unlock(&wil->back_rx_mutex); |
| 303 | |
| 304 | queue_work(wil->wq_service, &wil->back_rx_worker); |
| 305 | |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | static void wil_back_rx_handle(struct wil6210_priv *wil, |
| 310 | struct wil_back_rx *req) |
Vladimir Kondratiev | bd33273 | 2014-12-23 09:47:24 +0200 | [diff] [blame] | 311 | __acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock) |
Vladimir Kondratiev | 3277213 | 2014-12-23 09:47:03 +0200 | [diff] [blame] | 312 | { |
| 313 | struct wil_sta_info *sta; |
| 314 | u8 cid, tid; |
| 315 | u16 agg_wsize = 0; |
| 316 | /* bit 0: A-MSDU supported |
| 317 | * bit 1: policy (should be 0 for us) |
| 318 | * bits 2..5: TID |
| 319 | * bits 6..15: buffer size |
| 320 | */ |
| 321 | u16 req_agg_wsize = WIL_GET_BITS(req->ba_param_set, 6, 15); |
| 322 | bool agg_amsdu = !!(req->ba_param_set & BIT(0)); |
| 323 | int ba_policy = req->ba_param_set & BIT(1); |
| 324 | u16 agg_timeout = req->ba_timeout; |
| 325 | u16 status = WLAN_STATUS_SUCCESS; |
Vladimir Kondratiev | ff7c5c3 | 2014-12-23 09:47:23 +0200 | [diff] [blame] | 326 | u16 ssn = req->ba_seq_ctrl >> 4; |
Vladimir Kondratiev | 382afc3 | 2015-01-25 10:52:51 +0200 | [diff] [blame] | 327 | struct wil_tid_ampdu_rx *r; |
Vladimir Kondratiev | 3277213 | 2014-12-23 09:47:03 +0200 | [diff] [blame] | 328 | int rc; |
| 329 | |
Vladimir Kondratiev | bd33273 | 2014-12-23 09:47:24 +0200 | [diff] [blame] | 330 | might_sleep(); |
Vladimir Kondratiev | 3277213 | 2014-12-23 09:47:03 +0200 | [diff] [blame] | 331 | parse_cidxtid(req->cidxtid, &cid, &tid); |
| 332 | |
| 333 | /* sanity checks */ |
| 334 | if (cid >= WIL6210_MAX_CID) { |
| 335 | wil_err(wil, "BACK: invalid CID %d\n", cid); |
| 336 | return; |
| 337 | } |
| 338 | |
| 339 | sta = &wil->sta[cid]; |
| 340 | if (sta->status != wil_sta_connected) { |
| 341 | wil_err(wil, "BACK: CID %d not connected\n", cid); |
| 342 | return; |
| 343 | } |
| 344 | |
| 345 | wil_dbg_wmi(wil, |
Vladimir Kondratiev | ff7c5c3 | 2014-12-23 09:47:23 +0200 | [diff] [blame] | 346 | "ADDBA request for CID %d %pM TID %d size %d timeout %d AMSDU%s policy %d token %d SSN 0x%03x\n", |
Vladimir Kondratiev | 3277213 | 2014-12-23 09:47:03 +0200 | [diff] [blame] | 347 | cid, sta->addr, tid, req_agg_wsize, req->ba_timeout, |
Vladimir Kondratiev | ff7c5c3 | 2014-12-23 09:47:23 +0200 | [diff] [blame] | 348 | agg_amsdu ? "+" : "-", !!ba_policy, req->dialog_token, ssn); |
Vladimir Kondratiev | 3277213 | 2014-12-23 09:47:03 +0200 | [diff] [blame] | 349 | |
| 350 | /* apply policies */ |
| 351 | if (ba_policy) { |
| 352 | wil_err(wil, "BACK requested unsupported ba_policy == 1\n"); |
| 353 | status = WLAN_STATUS_INVALID_QOS_PARAM; |
| 354 | } |
| 355 | if (status == WLAN_STATUS_SUCCESS) |
| 356 | agg_wsize = wil_agg_size(wil, req_agg_wsize); |
| 357 | |
| 358 | rc = wmi_addba_rx_resp(wil, cid, tid, req->dialog_token, status, |
| 359 | agg_amsdu, agg_wsize, agg_timeout); |
| 360 | if (rc || (status != WLAN_STATUS_SUCCESS)) |
| 361 | return; |
| 362 | |
| 363 | /* apply */ |
Vladimir Kondratiev | 382afc3 | 2015-01-25 10:52:51 +0200 | [diff] [blame] | 364 | r = wil_tid_ampdu_rx_alloc(wil, agg_wsize, ssn); |
Vladimir Kondratiev | bd33273 | 2014-12-23 09:47:24 +0200 | [diff] [blame] | 365 | spin_lock_bh(&sta->tid_rx_lock); |
Vladimir Kondratiev | 3277213 | 2014-12-23 09:47:03 +0200 | [diff] [blame] | 366 | wil_tid_ampdu_rx_free(wil, sta->tid_rx[tid]); |
Vladimir Kondratiev | 382afc3 | 2015-01-25 10:52:51 +0200 | [diff] [blame] | 367 | sta->tid_rx[tid] = r; |
Vladimir Kondratiev | bd33273 | 2014-12-23 09:47:24 +0200 | [diff] [blame] | 368 | spin_unlock_bh(&sta->tid_rx_lock); |
Vladimir Kondratiev | 3277213 | 2014-12-23 09:47:03 +0200 | [diff] [blame] | 369 | } |
| 370 | |
| 371 | void wil_back_rx_flush(struct wil6210_priv *wil) |
| 372 | { |
| 373 | struct wil_back_rx *evt, *t; |
| 374 | |
| 375 | wil_dbg_misc(wil, "%s()\n", __func__); |
| 376 | |
| 377 | mutex_lock(&wil->back_rx_mutex); |
| 378 | |
| 379 | list_for_each_entry_safe(evt, t, &wil->back_rx_pending, list) { |
| 380 | list_del(&evt->list); |
| 381 | kfree(evt); |
| 382 | } |
| 383 | |
| 384 | mutex_unlock(&wil->back_rx_mutex); |
| 385 | } |
| 386 | |
| 387 | /* Retrieve next ADDBA request from the pending list */ |
| 388 | static struct list_head *next_back_rx(struct wil6210_priv *wil) |
| 389 | { |
| 390 | struct list_head *ret = NULL; |
| 391 | |
| 392 | mutex_lock(&wil->back_rx_mutex); |
| 393 | |
| 394 | if (!list_empty(&wil->back_rx_pending)) { |
| 395 | ret = wil->back_rx_pending.next; |
| 396 | list_del(ret); |
| 397 | } |
| 398 | |
| 399 | mutex_unlock(&wil->back_rx_mutex); |
| 400 | |
| 401 | return ret; |
| 402 | } |
| 403 | |
| 404 | void wil_back_rx_worker(struct work_struct *work) |
| 405 | { |
| 406 | struct wil6210_priv *wil = container_of(work, struct wil6210_priv, |
| 407 | back_rx_worker); |
| 408 | struct wil_back_rx *evt; |
| 409 | struct list_head *lh; |
| 410 | |
| 411 | while ((lh = next_back_rx(wil)) != NULL) { |
| 412 | evt = list_entry(lh, struct wil_back_rx, list); |
| 413 | |
| 414 | wil_back_rx_handle(wil, evt); |
| 415 | kfree(evt); |
| 416 | } |
| 417 | } |
Vladimir Kondratiev | 3a124ed | 2014-12-23 09:47:04 +0200 | [diff] [blame] | 418 | |
| 419 | /* BACK - Tx (originator) side */ |
| 420 | static void wil_back_tx_handle(struct wil6210_priv *wil, |
| 421 | struct wil_back_tx *req) |
| 422 | { |
| 423 | struct vring_tx_data *txdata = &wil->vring_tx_data[req->ringid]; |
| 424 | int rc; |
| 425 | |
| 426 | if (txdata->addba_in_progress) { |
| 427 | wil_dbg_misc(wil, "ADDBA for vring[%d] already in progress\n", |
| 428 | req->ringid); |
| 429 | return; |
| 430 | } |
| 431 | if (txdata->agg_wsize) { |
| 432 | wil_dbg_misc(wil, |
| 433 | "ADDBA for vring[%d] already established wsize %d\n", |
| 434 | req->ringid, txdata->agg_wsize); |
| 435 | return; |
| 436 | } |
| 437 | txdata->addba_in_progress = true; |
| 438 | rc = wmi_addba(wil, req->ringid, req->agg_wsize, req->agg_timeout); |
| 439 | if (rc) |
| 440 | txdata->addba_in_progress = false; |
| 441 | } |
| 442 | |
| 443 | static struct list_head *next_back_tx(struct wil6210_priv *wil) |
| 444 | { |
| 445 | struct list_head *ret = NULL; |
| 446 | |
| 447 | mutex_lock(&wil->back_tx_mutex); |
| 448 | |
| 449 | if (!list_empty(&wil->back_tx_pending)) { |
| 450 | ret = wil->back_tx_pending.next; |
| 451 | list_del(ret); |
| 452 | } |
| 453 | |
| 454 | mutex_unlock(&wil->back_tx_mutex); |
| 455 | |
| 456 | return ret; |
| 457 | } |
| 458 | |
| 459 | void wil_back_tx_worker(struct work_struct *work) |
| 460 | { |
| 461 | struct wil6210_priv *wil = container_of(work, struct wil6210_priv, |
| 462 | back_tx_worker); |
| 463 | struct wil_back_tx *evt; |
| 464 | struct list_head *lh; |
| 465 | |
| 466 | while ((lh = next_back_tx(wil)) != NULL) { |
| 467 | evt = list_entry(lh, struct wil_back_tx, list); |
| 468 | |
| 469 | wil_back_tx_handle(wil, evt); |
| 470 | kfree(evt); |
| 471 | } |
| 472 | } |
| 473 | |
| 474 | void wil_back_tx_flush(struct wil6210_priv *wil) |
| 475 | { |
| 476 | struct wil_back_tx *evt, *t; |
| 477 | |
| 478 | wil_dbg_misc(wil, "%s()\n", __func__); |
| 479 | |
| 480 | mutex_lock(&wil->back_tx_mutex); |
| 481 | |
| 482 | list_for_each_entry_safe(evt, t, &wil->back_tx_pending, list) { |
| 483 | list_del(&evt->list); |
| 484 | kfree(evt); |
| 485 | } |
| 486 | |
| 487 | mutex_unlock(&wil->back_tx_mutex); |
| 488 | } |
| 489 | |
Vladimir Kondratiev | 3a3def8 | 2014-12-23 09:47:05 +0200 | [diff] [blame] | 490 | int wil_addba_tx_request(struct wil6210_priv *wil, u8 ringid, u16 wsize) |
Vladimir Kondratiev | 3a124ed | 2014-12-23 09:47:04 +0200 | [diff] [blame] | 491 | { |
| 492 | struct wil_back_tx *req = kzalloc(sizeof(*req), GFP_KERNEL); |
| 493 | |
| 494 | if (!req) |
| 495 | return -ENOMEM; |
| 496 | |
| 497 | req->ringid = ringid; |
Vladimir Kondratiev | 3a3def8 | 2014-12-23 09:47:05 +0200 | [diff] [blame] | 498 | req->agg_wsize = wil_agg_size(wil, wsize); |
Vladimir Kondratiev | 3a124ed | 2014-12-23 09:47:04 +0200 | [diff] [blame] | 499 | req->agg_timeout = 0; |
| 500 | |
| 501 | mutex_lock(&wil->back_tx_mutex); |
| 502 | list_add_tail(&req->list, &wil->back_tx_pending); |
| 503 | mutex_unlock(&wil->back_tx_mutex); |
| 504 | |
| 505 | queue_work(wil->wq_service, &wil->back_tx_worker); |
| 506 | |
| 507 | return 0; |
| 508 | } |