Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 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 | u8 pipe; |
| 89 | |
| 90 | spin_lock_init(&htt->tx_lock); |
| 91 | init_waitqueue_head(&htt->empty_tx_wq); |
| 92 | |
| 93 | /* At the beginning free queue number should hint us the maximum |
| 94 | * queue length */ |
Michal Kazior | cd003fa | 2013-07-05 16:15:13 +0300 | [diff] [blame] | 95 | pipe = htt->ar->htc.endpoint[htt->eid].ul_pipe_id; |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 96 | htt->max_num_pending_tx = ath10k_hif_get_free_queue_number(htt->ar, |
| 97 | pipe); |
| 98 | |
Kalle Valo | aad0b65 | 2013-09-08 17:56:02 +0300 | [diff] [blame] | 99 | ath10k_dbg(ATH10K_DBG_BOOT, "htt tx max num pending tx %d\n", |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 100 | htt->max_num_pending_tx); |
| 101 | |
| 102 | htt->pending_tx = kzalloc(sizeof(*htt->pending_tx) * |
| 103 | htt->max_num_pending_tx, GFP_KERNEL); |
| 104 | if (!htt->pending_tx) |
| 105 | return -ENOMEM; |
| 106 | |
| 107 | htt->used_msdu_ids = kzalloc(sizeof(unsigned long) * |
| 108 | BITS_TO_LONGS(htt->max_num_pending_tx), |
| 109 | GFP_KERNEL); |
| 110 | if (!htt->used_msdu_ids) { |
| 111 | kfree(htt->pending_tx); |
| 112 | return -ENOMEM; |
| 113 | } |
| 114 | |
| 115 | return 0; |
| 116 | } |
| 117 | |
| 118 | static void ath10k_htt_tx_cleanup_pending(struct ath10k_htt *htt) |
| 119 | { |
Michal Kazior | 0a89f8a | 2013-09-18 14:43:20 +0200 | [diff] [blame] | 120 | struct htt_tx_done tx_done = {0}; |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 121 | int msdu_id; |
| 122 | |
| 123 | /* No locks needed. Called after communication with the device has |
| 124 | * been stopped. */ |
| 125 | |
| 126 | for (msdu_id = 0; msdu_id < htt->max_num_pending_tx; msdu_id++) { |
| 127 | if (!test_bit(msdu_id, htt->used_msdu_ids)) |
| 128 | continue; |
| 129 | |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 130 | ath10k_dbg(ATH10K_DBG_HTT, "force cleanup msdu_id %hu\n", |
| 131 | msdu_id); |
| 132 | |
Michal Kazior | 0a89f8a | 2013-09-18 14:43:20 +0200 | [diff] [blame] | 133 | tx_done.discard = 1; |
| 134 | tx_done.msdu_id = msdu_id; |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 135 | |
Michal Kazior | 0a89f8a | 2013-09-18 14:43:20 +0200 | [diff] [blame] | 136 | ath10k_txrx_tx_unref(htt, &tx_done); |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 137 | } |
| 138 | } |
| 139 | |
| 140 | void ath10k_htt_tx_detach(struct ath10k_htt *htt) |
| 141 | { |
| 142 | ath10k_htt_tx_cleanup_pending(htt); |
| 143 | kfree(htt->pending_tx); |
| 144 | kfree(htt->used_msdu_ids); |
| 145 | return; |
| 146 | } |
| 147 | |
| 148 | void ath10k_htt_htc_tx_complete(struct ath10k *ar, struct sk_buff *skb) |
| 149 | { |
Michal Kazior | 0a89f8a | 2013-09-18 14:43:20 +0200 | [diff] [blame] | 150 | dev_kfree_skb_any(skb); |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 151 | } |
| 152 | |
| 153 | int ath10k_htt_h2t_ver_req_msg(struct ath10k_htt *htt) |
| 154 | { |
| 155 | struct sk_buff *skb; |
| 156 | struct htt_cmd *cmd; |
| 157 | int len = 0; |
| 158 | int ret; |
| 159 | |
| 160 | len += sizeof(cmd->hdr); |
| 161 | len += sizeof(cmd->ver_req); |
| 162 | |
| 163 | skb = ath10k_htc_alloc_skb(len); |
| 164 | if (!skb) |
| 165 | return -ENOMEM; |
| 166 | |
| 167 | skb_put(skb, len); |
| 168 | cmd = (struct htt_cmd *)skb->data; |
| 169 | cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_VERSION_REQ; |
| 170 | |
Michal Kazior | cd003fa | 2013-07-05 16:15:13 +0300 | [diff] [blame] | 171 | ret = ath10k_htc_send(&htt->ar->htc, htt->eid, skb); |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 172 | if (ret) { |
| 173 | dev_kfree_skb_any(skb); |
| 174 | return ret; |
| 175 | } |
| 176 | |
| 177 | return 0; |
| 178 | } |
| 179 | |
Kalle Valo | a3d135e | 2013-09-03 11:44:10 +0300 | [diff] [blame] | 180 | int ath10k_htt_h2t_stats_req(struct ath10k_htt *htt, u8 mask, u64 cookie) |
| 181 | { |
| 182 | struct htt_stats_req *req; |
| 183 | struct sk_buff *skb; |
| 184 | struct htt_cmd *cmd; |
| 185 | int len = 0, ret; |
| 186 | |
| 187 | len += sizeof(cmd->hdr); |
| 188 | len += sizeof(cmd->stats_req); |
| 189 | |
| 190 | skb = ath10k_htc_alloc_skb(len); |
| 191 | if (!skb) |
| 192 | return -ENOMEM; |
| 193 | |
| 194 | skb_put(skb, len); |
| 195 | cmd = (struct htt_cmd *)skb->data; |
| 196 | cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_STATS_REQ; |
| 197 | |
| 198 | req = &cmd->stats_req; |
| 199 | |
| 200 | memset(req, 0, sizeof(*req)); |
| 201 | |
| 202 | /* currently we support only max 8 bit masks so no need to worry |
| 203 | * about endian support */ |
| 204 | req->upload_types[0] = mask; |
| 205 | req->reset_types[0] = mask; |
| 206 | req->stat_type = HTT_STATS_REQ_CFG_STAT_TYPE_INVALID; |
| 207 | req->cookie_lsb = cpu_to_le32(cookie & 0xffffffff); |
| 208 | req->cookie_msb = cpu_to_le32((cookie & 0xffffffff00000000ULL) >> 32); |
| 209 | |
Kalle Valo | a3d135e | 2013-09-03 11:44:10 +0300 | [diff] [blame] | 210 | ret = ath10k_htc_send(&htt->ar->htc, htt->eid, skb); |
| 211 | if (ret) { |
| 212 | ath10k_warn("failed to send htt type stats request: %d", ret); |
| 213 | dev_kfree_skb_any(skb); |
| 214 | return ret; |
| 215 | } |
| 216 | |
| 217 | return 0; |
| 218 | } |
| 219 | |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 220 | int ath10k_htt_send_rx_ring_cfg_ll(struct ath10k_htt *htt) |
| 221 | { |
| 222 | struct sk_buff *skb; |
| 223 | struct htt_cmd *cmd; |
| 224 | struct htt_rx_ring_setup_ring *ring; |
| 225 | const int num_rx_ring = 1; |
| 226 | u16 flags; |
| 227 | u32 fw_idx; |
| 228 | int len; |
| 229 | int ret; |
| 230 | |
| 231 | /* |
| 232 | * the HW expects the buffer to be an integral number of 4-byte |
| 233 | * "words" |
| 234 | */ |
| 235 | BUILD_BUG_ON(!IS_ALIGNED(HTT_RX_BUF_SIZE, 4)); |
| 236 | BUILD_BUG_ON((HTT_RX_BUF_SIZE & HTT_MAX_CACHE_LINE_SIZE_MASK) != 0); |
| 237 | |
| 238 | len = sizeof(cmd->hdr) + sizeof(cmd->rx_setup.hdr) |
| 239 | + (sizeof(*ring) * num_rx_ring); |
| 240 | skb = ath10k_htc_alloc_skb(len); |
| 241 | if (!skb) |
| 242 | return -ENOMEM; |
| 243 | |
| 244 | skb_put(skb, len); |
| 245 | |
| 246 | cmd = (struct htt_cmd *)skb->data; |
| 247 | ring = &cmd->rx_setup.rings[0]; |
| 248 | |
| 249 | cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_RX_RING_CFG; |
| 250 | cmd->rx_setup.hdr.num_rings = 1; |
| 251 | |
| 252 | /* FIXME: do we need all of this? */ |
| 253 | flags = 0; |
| 254 | flags |= HTT_RX_RING_FLAGS_MAC80211_HDR; |
| 255 | flags |= HTT_RX_RING_FLAGS_MSDU_PAYLOAD; |
| 256 | flags |= HTT_RX_RING_FLAGS_PPDU_START; |
| 257 | flags |= HTT_RX_RING_FLAGS_PPDU_END; |
| 258 | flags |= HTT_RX_RING_FLAGS_MPDU_START; |
| 259 | flags |= HTT_RX_RING_FLAGS_MPDU_END; |
| 260 | flags |= HTT_RX_RING_FLAGS_MSDU_START; |
| 261 | flags |= HTT_RX_RING_FLAGS_MSDU_END; |
| 262 | flags |= HTT_RX_RING_FLAGS_RX_ATTENTION; |
| 263 | flags |= HTT_RX_RING_FLAGS_FRAG_INFO; |
| 264 | flags |= HTT_RX_RING_FLAGS_UNICAST_RX; |
| 265 | flags |= HTT_RX_RING_FLAGS_MULTICAST_RX; |
| 266 | flags |= HTT_RX_RING_FLAGS_CTRL_RX; |
| 267 | flags |= HTT_RX_RING_FLAGS_MGMT_RX; |
| 268 | flags |= HTT_RX_RING_FLAGS_NULL_RX; |
| 269 | flags |= HTT_RX_RING_FLAGS_PHY_DATA_RX; |
| 270 | |
| 271 | fw_idx = __le32_to_cpu(*htt->rx_ring.alloc_idx.vaddr); |
| 272 | |
| 273 | ring->fw_idx_shadow_reg_paddr = |
| 274 | __cpu_to_le32(htt->rx_ring.alloc_idx.paddr); |
| 275 | ring->rx_ring_base_paddr = __cpu_to_le32(htt->rx_ring.base_paddr); |
| 276 | ring->rx_ring_len = __cpu_to_le16(htt->rx_ring.size); |
| 277 | ring->rx_ring_bufsize = __cpu_to_le16(HTT_RX_BUF_SIZE); |
| 278 | ring->flags = __cpu_to_le16(flags); |
| 279 | ring->fw_idx_init_val = __cpu_to_le16(fw_idx); |
| 280 | |
| 281 | #define desc_offset(x) (offsetof(struct htt_rx_desc, x) / 4) |
| 282 | |
| 283 | ring->mac80211_hdr_offset = __cpu_to_le16(desc_offset(rx_hdr_status)); |
| 284 | ring->msdu_payload_offset = __cpu_to_le16(desc_offset(msdu_payload)); |
| 285 | ring->ppdu_start_offset = __cpu_to_le16(desc_offset(ppdu_start)); |
| 286 | ring->ppdu_end_offset = __cpu_to_le16(desc_offset(ppdu_end)); |
| 287 | ring->mpdu_start_offset = __cpu_to_le16(desc_offset(mpdu_start)); |
| 288 | ring->mpdu_end_offset = __cpu_to_le16(desc_offset(mpdu_end)); |
| 289 | ring->msdu_start_offset = __cpu_to_le16(desc_offset(msdu_start)); |
| 290 | ring->msdu_end_offset = __cpu_to_le16(desc_offset(msdu_end)); |
| 291 | ring->rx_attention_offset = __cpu_to_le16(desc_offset(attention)); |
| 292 | ring->frag_info_offset = __cpu_to_le16(desc_offset(frag_info)); |
| 293 | |
| 294 | #undef desc_offset |
| 295 | |
Michal Kazior | cd003fa | 2013-07-05 16:15:13 +0300 | [diff] [blame] | 296 | ret = ath10k_htc_send(&htt->ar->htc, htt->eid, skb); |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 297 | if (ret) { |
| 298 | dev_kfree_skb_any(skb); |
| 299 | return ret; |
| 300 | } |
| 301 | |
| 302 | return 0; |
| 303 | } |
| 304 | |
| 305 | int ath10k_htt_mgmt_tx(struct ath10k_htt *htt, struct sk_buff *msdu) |
| 306 | { |
| 307 | struct device *dev = htt->ar->dev; |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 308 | struct sk_buff *txdesc = NULL; |
| 309 | struct htt_cmd *cmd; |
Michal Kazior | 1f8bb15 | 2013-09-18 14:43:22 +0200 | [diff] [blame] | 310 | struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(msdu); |
Bartosz Markowski | 5e00d31 | 2013-09-26 17:47:12 +0200 | [diff] [blame] | 311 | u8 vdev_id = skb_cb->vdev_id; |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 312 | int len = 0; |
| 313 | int msdu_id = -1; |
| 314 | int res; |
| 315 | |
| 316 | |
| 317 | res = ath10k_htt_tx_inc_pending(htt); |
| 318 | if (res) |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 319 | goto err; |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 320 | |
| 321 | len += sizeof(cmd->hdr); |
| 322 | len += sizeof(cmd->mgmt_tx); |
| 323 | |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 324 | spin_lock_bh(&htt->tx_lock); |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 325 | res = ath10k_htt_tx_alloc_msdu_id(htt); |
| 326 | if (res < 0) { |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 327 | spin_unlock_bh(&htt->tx_lock); |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 328 | goto err_tx_dec; |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 329 | } |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 330 | msdu_id = res; |
Michal Kazior | 0a89f8a | 2013-09-18 14:43:20 +0200 | [diff] [blame] | 331 | htt->pending_tx[msdu_id] = msdu; |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 332 | spin_unlock_bh(&htt->tx_lock); |
| 333 | |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 334 | txdesc = ath10k_htc_alloc_skb(len); |
| 335 | if (!txdesc) { |
| 336 | res = -ENOMEM; |
| 337 | goto err_free_msdu_id; |
| 338 | } |
| 339 | |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 340 | res = ath10k_skb_map(dev, msdu); |
| 341 | if (res) |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 342 | goto err_free_txdesc; |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 343 | |
| 344 | skb_put(txdesc, len); |
| 345 | cmd = (struct htt_cmd *)txdesc->data; |
| 346 | cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_MGMT_TX; |
| 347 | cmd->mgmt_tx.msdu_paddr = __cpu_to_le32(ATH10K_SKB_CB(msdu)->paddr); |
| 348 | cmd->mgmt_tx.len = __cpu_to_le32(msdu->len); |
| 349 | cmd->mgmt_tx.desc_id = __cpu_to_le32(msdu_id); |
| 350 | cmd->mgmt_tx.vdev_id = __cpu_to_le32(vdev_id); |
| 351 | memcpy(cmd->mgmt_tx.hdr, msdu->data, |
| 352 | min_t(int, msdu->len, HTT_MGMT_FRM_HDR_DOWNLOAD_LEN)); |
| 353 | |
Michal Kazior | 1f8bb15 | 2013-09-18 14:43:22 +0200 | [diff] [blame] | 354 | skb_cb->htt.frag_len = 0; |
| 355 | skb_cb->htt.pad_len = 0; |
| 356 | |
Michal Kazior | cd003fa | 2013-07-05 16:15:13 +0300 | [diff] [blame] | 357 | res = ath10k_htc_send(&htt->ar->htc, htt->eid, txdesc); |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 358 | if (res) |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 359 | goto err_unmap_msdu; |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 360 | |
| 361 | return 0; |
| 362 | |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 363 | err_unmap_msdu: |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 364 | ath10k_skb_unmap(dev, msdu); |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 365 | err_free_txdesc: |
| 366 | dev_kfree_skb_any(txdesc); |
| 367 | err_free_msdu_id: |
| 368 | spin_lock_bh(&htt->tx_lock); |
| 369 | htt->pending_tx[msdu_id] = NULL; |
| 370 | ath10k_htt_tx_free_msdu_id(htt, msdu_id); |
| 371 | spin_unlock_bh(&htt->tx_lock); |
| 372 | err_tx_dec: |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 373 | ath10k_htt_tx_dec_pending(htt); |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 374 | err: |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 375 | return res; |
| 376 | } |
| 377 | |
| 378 | int ath10k_htt_tx(struct ath10k_htt *htt, struct sk_buff *msdu) |
| 379 | { |
| 380 | struct device *dev = htt->ar->dev; |
| 381 | struct htt_cmd *cmd; |
| 382 | struct htt_data_tx_desc_frag *tx_frags; |
| 383 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)msdu->data; |
Michal Kazior | 1f8bb15 | 2013-09-18 14:43:22 +0200 | [diff] [blame] | 384 | struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(msdu); |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 385 | struct sk_buff *txdesc = NULL; |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 386 | bool use_frags; |
Bartosz Markowski | 5e00d31 | 2013-09-26 17:47:12 +0200 | [diff] [blame] | 387 | u8 vdev_id = ATH10K_SKB_CB(msdu)->vdev_id; |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 388 | u8 tid; |
Michal Kazior | 1f8bb15 | 2013-09-18 14:43:22 +0200 | [diff] [blame] | 389 | int prefetch_len, desc_len; |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 390 | int msdu_id = -1; |
| 391 | int res; |
| 392 | u8 flags0; |
| 393 | u16 flags1; |
| 394 | |
| 395 | res = ath10k_htt_tx_inc_pending(htt); |
| 396 | if (res) |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 397 | goto err; |
| 398 | |
| 399 | spin_lock_bh(&htt->tx_lock); |
| 400 | res = ath10k_htt_tx_alloc_msdu_id(htt); |
| 401 | if (res < 0) { |
| 402 | spin_unlock_bh(&htt->tx_lock); |
| 403 | goto err_tx_dec; |
| 404 | } |
| 405 | msdu_id = res; |
| 406 | htt->pending_tx[msdu_id] = msdu; |
| 407 | spin_unlock_bh(&htt->tx_lock); |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 408 | |
| 409 | prefetch_len = min(htt->prefetch_len, msdu->len); |
| 410 | prefetch_len = roundup(prefetch_len, 4); |
| 411 | |
| 412 | desc_len = sizeof(cmd->hdr) + sizeof(cmd->data_tx) + prefetch_len; |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 413 | |
| 414 | txdesc = ath10k_htc_alloc_skb(desc_len); |
| 415 | if (!txdesc) { |
| 416 | res = -ENOMEM; |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 417 | goto err_free_msdu_id; |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 418 | } |
| 419 | |
Michal Kazior | 961d4c3 | 2013-08-09 10:13:34 +0200 | [diff] [blame] | 420 | /* Since HTT 3.0 there is no separate mgmt tx command. However in case |
| 421 | * of mgmt tx using TX_FRM there is not tx fragment list. Instead of tx |
| 422 | * fragment list host driver specifies directly frame pointer. */ |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 423 | use_frags = htt->target_version_major < 3 || |
| 424 | !ieee80211_is_mgmt(hdr->frame_control); |
| 425 | |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 426 | if (!IS_ALIGNED((unsigned long)txdesc->data, 4)) { |
| 427 | ath10k_warn("htt alignment check failed. dropping packet.\n"); |
| 428 | res = -EIO; |
Michal Kazior | 1f8bb15 | 2013-09-18 14:43:22 +0200 | [diff] [blame] | 429 | goto err_free_txdesc; |
| 430 | } |
| 431 | |
| 432 | if (use_frags) { |
| 433 | skb_cb->htt.frag_len = sizeof(*tx_frags) * 2; |
| 434 | skb_cb->htt.pad_len = (unsigned long)msdu->data - |
| 435 | round_down((unsigned long)msdu->data, 4); |
| 436 | |
| 437 | skb_push(msdu, skb_cb->htt.frag_len + skb_cb->htt.pad_len); |
| 438 | } else { |
| 439 | skb_cb->htt.frag_len = 0; |
| 440 | skb_cb->htt.pad_len = 0; |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 441 | } |
| 442 | |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 443 | res = ath10k_skb_map(dev, msdu); |
| 444 | if (res) |
Michal Kazior | 1f8bb15 | 2013-09-18 14:43:22 +0200 | [diff] [blame] | 445 | goto err_pull_txfrag; |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 446 | |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 447 | if (use_frags) { |
Michal Kazior | 1f8bb15 | 2013-09-18 14:43:22 +0200 | [diff] [blame] | 448 | dma_sync_single_for_cpu(dev, skb_cb->paddr, msdu->len, |
| 449 | DMA_TO_DEVICE); |
| 450 | |
Michal Kazior | 961d4c3 | 2013-08-09 10:13:34 +0200 | [diff] [blame] | 451 | /* tx fragment list must be terminated with zero-entry */ |
Michal Kazior | 1f8bb15 | 2013-09-18 14:43:22 +0200 | [diff] [blame] | 452 | tx_frags = (struct htt_data_tx_desc_frag *)msdu->data; |
| 453 | tx_frags[0].paddr = __cpu_to_le32(skb_cb->paddr + |
| 454 | skb_cb->htt.frag_len + |
| 455 | skb_cb->htt.pad_len); |
| 456 | tx_frags[0].len = __cpu_to_le32(msdu->len - |
| 457 | skb_cb->htt.frag_len - |
| 458 | skb_cb->htt.pad_len); |
Michal Kazior | 961d4c3 | 2013-08-09 10:13:34 +0200 | [diff] [blame] | 459 | tx_frags[1].paddr = __cpu_to_le32(0); |
| 460 | tx_frags[1].len = __cpu_to_le32(0); |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 461 | |
Michal Kazior | 1f8bb15 | 2013-09-18 14:43:22 +0200 | [diff] [blame] | 462 | dma_sync_single_for_device(dev, skb_cb->paddr, msdu->len, |
| 463 | DMA_TO_DEVICE); |
Michal Kazior | 961d4c3 | 2013-08-09 10:13:34 +0200 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | ath10k_dbg(ATH10K_DBG_HTT, "msdu 0x%llx\n", |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 467 | (unsigned long long) ATH10K_SKB_CB(msdu)->paddr); |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 468 | ath10k_dbg_dump(ATH10K_DBG_HTT_DUMP, NULL, "msdu: ", |
| 469 | msdu->data, msdu->len); |
| 470 | |
| 471 | skb_put(txdesc, desc_len); |
| 472 | cmd = (struct htt_cmd *)txdesc->data; |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 473 | |
| 474 | tid = ATH10K_SKB_CB(msdu)->htt.tid; |
| 475 | |
| 476 | ath10k_dbg(ATH10K_DBG_HTT, "htt data tx using tid %hhu\n", tid); |
| 477 | |
| 478 | flags0 = 0; |
| 479 | if (!ieee80211_has_protected(hdr->frame_control)) |
| 480 | flags0 |= HTT_DATA_TX_DESC_FLAGS0_NO_ENCRYPT; |
| 481 | flags0 |= HTT_DATA_TX_DESC_FLAGS0_MAC_HDR_PRESENT; |
Michal Kazior | 961d4c3 | 2013-08-09 10:13:34 +0200 | [diff] [blame] | 482 | |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 483 | if (use_frags) |
| 484 | flags0 |= SM(ATH10K_HW_TXRX_NATIVE_WIFI, |
Michal Kazior | 961d4c3 | 2013-08-09 10:13:34 +0200 | [diff] [blame] | 485 | HTT_DATA_TX_DESC_FLAGS0_PKT_TYPE); |
| 486 | else |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 487 | flags0 |= SM(ATH10K_HW_TXRX_MGMT, |
Michal Kazior | 961d4c3 | 2013-08-09 10:13:34 +0200 | [diff] [blame] | 488 | HTT_DATA_TX_DESC_FLAGS0_PKT_TYPE); |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 489 | |
| 490 | flags1 = 0; |
| 491 | flags1 |= SM((u16)vdev_id, HTT_DATA_TX_DESC_FLAGS1_VDEV_ID); |
| 492 | flags1 |= SM((u16)tid, HTT_DATA_TX_DESC_FLAGS1_EXT_TID); |
Michal Kazior | 7c19999 | 2013-07-31 10:47:57 +0200 | [diff] [blame] | 493 | flags1 |= HTT_DATA_TX_DESC_FLAGS1_CKSUM_L3_OFFLOAD; |
| 494 | flags1 |= HTT_DATA_TX_DESC_FLAGS1_CKSUM_L4_OFFLOAD; |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 495 | |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 496 | cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_TX_FRM; |
| 497 | cmd->data_tx.flags0 = flags0; |
| 498 | cmd->data_tx.flags1 = __cpu_to_le16(flags1); |
Michal Kazior | 1f8bb15 | 2013-09-18 14:43:22 +0200 | [diff] [blame] | 499 | cmd->data_tx.len = __cpu_to_le16(msdu->len - |
| 500 | skb_cb->htt.frag_len - |
| 501 | skb_cb->htt.pad_len); |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 502 | cmd->data_tx.id = __cpu_to_le16(msdu_id); |
Michal Kazior | 1f8bb15 | 2013-09-18 14:43:22 +0200 | [diff] [blame] | 503 | cmd->data_tx.frags_paddr = __cpu_to_le32(skb_cb->paddr); |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 504 | cmd->data_tx.peerid = __cpu_to_le32(HTT_INVALID_PEERID); |
| 505 | |
Michal Kazior | 1f8bb15 | 2013-09-18 14:43:22 +0200 | [diff] [blame] | 506 | memcpy(cmd->data_tx.prefetch, hdr, prefetch_len); |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 507 | |
Michal Kazior | cd003fa | 2013-07-05 16:15:13 +0300 | [diff] [blame] | 508 | res = ath10k_htc_send(&htt->ar->htc, htt->eid, txdesc); |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 509 | if (res) |
Michal Kazior | 1f8bb15 | 2013-09-18 14:43:22 +0200 | [diff] [blame] | 510 | goto err_unmap_msdu; |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 511 | |
| 512 | return 0; |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 513 | |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 514 | err_unmap_msdu: |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 515 | ath10k_skb_unmap(dev, msdu); |
Michal Kazior | 1f8bb15 | 2013-09-18 14:43:22 +0200 | [diff] [blame] | 516 | err_pull_txfrag: |
| 517 | skb_pull(msdu, skb_cb->htt.frag_len + skb_cb->htt.pad_len); |
Michal Kazior | 2f3773b | 2013-09-18 14:43:21 +0200 | [diff] [blame] | 518 | err_free_txdesc: |
| 519 | dev_kfree_skb_any(txdesc); |
| 520 | err_free_msdu_id: |
| 521 | spin_lock_bh(&htt->tx_lock); |
| 522 | htt->pending_tx[msdu_id] = NULL; |
| 523 | ath10k_htt_tx_free_msdu_id(htt, msdu_id); |
| 524 | spin_unlock_bh(&htt->tx_lock); |
| 525 | err_tx_dec: |
| 526 | ath10k_htt_tx_dec_pending(htt); |
| 527 | err: |
Kalle Valo | 5e3dd15 | 2013-06-12 20:52:10 +0300 | [diff] [blame] | 528 | return res; |
| 529 | } |