Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 1 | /* |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 2 | * This file is part of wl1251 |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 3 | * |
| 4 | * Copyright (c) 1998-2007 Texas Instruments Incorporated |
| 5 | * Copyright (C) 2008 Nokia Corporation |
| 6 | * |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * version 2 as published by the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, but |
| 12 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA |
| 19 | * 02110-1301 USA |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include <linux/kernel.h> |
| 24 | #include <linux/module.h> |
| 25 | |
Kalle Valo | 1367411 | 2009-06-12 14:17:25 +0300 | [diff] [blame] | 26 | #include "wl1251.h" |
Kalle Valo | 9bc6772 | 2010-10-10 11:28:32 +0300 | [diff] [blame] | 27 | #include "reg.h" |
| 28 | #include "tx.h" |
| 29 | #include "ps.h" |
| 30 | #include "io.h" |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 31 | |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 32 | static bool wl1251_tx_double_buffer_busy(struct wl1251 *wl, u32 data_out_count) |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 33 | { |
| 34 | int used, data_in_count; |
| 35 | |
| 36 | data_in_count = wl->data_in_count; |
| 37 | |
| 38 | if (data_in_count < data_out_count) |
| 39 | /* data_in_count has wrapped */ |
| 40 | data_in_count += TX_STATUS_DATA_OUT_COUNT_MASK + 1; |
| 41 | |
| 42 | used = data_in_count - data_out_count; |
| 43 | |
| 44 | WARN_ON(used < 0); |
| 45 | WARN_ON(used > DP_TX_PACKET_RING_CHUNK_NUM); |
| 46 | |
| 47 | if (used >= DP_TX_PACKET_RING_CHUNK_NUM) |
| 48 | return true; |
| 49 | else |
| 50 | return false; |
| 51 | } |
| 52 | |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 53 | static int wl1251_tx_path_status(struct wl1251 *wl) |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 54 | { |
| 55 | u32 status, addr, data_out_count; |
| 56 | bool busy; |
| 57 | |
| 58 | addr = wl->data_path->tx_control_addr; |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 59 | status = wl1251_mem_read32(wl, addr); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 60 | data_out_count = status & TX_STATUS_DATA_OUT_COUNT_MASK; |
Juuso Oikarinen | 9f2ad4f | 2009-06-12 14:15:54 +0300 | [diff] [blame] | 61 | busy = wl1251_tx_double_buffer_busy(wl, data_out_count); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 62 | |
| 63 | if (busy) |
| 64 | return -EBUSY; |
| 65 | |
| 66 | return 0; |
| 67 | } |
| 68 | |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 69 | static int wl1251_tx_id(struct wl1251 *wl, struct sk_buff *skb) |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 70 | { |
| 71 | int i; |
| 72 | |
| 73 | for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++) |
| 74 | if (wl->tx_frames[i] == NULL) { |
| 75 | wl->tx_frames[i] = skb; |
| 76 | return i; |
| 77 | } |
| 78 | |
| 79 | return -EBUSY; |
| 80 | } |
| 81 | |
Juuso Oikarinen | 9f2ad4f | 2009-06-12 14:15:54 +0300 | [diff] [blame] | 82 | static void wl1251_tx_control(struct tx_double_buffer_desc *tx_hdr, |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 83 | struct ieee80211_tx_info *control, u16 fc) |
| 84 | { |
| 85 | *(u16 *)&tx_hdr->control = 0; |
| 86 | |
| 87 | tx_hdr->control.rate_policy = 0; |
| 88 | |
| 89 | /* 802.11 packets */ |
| 90 | tx_hdr->control.packet_type = 0; |
| 91 | |
| 92 | if (control->flags & IEEE80211_TX_CTL_NO_ACK) |
| 93 | tx_hdr->control.ack_policy = 1; |
| 94 | |
| 95 | tx_hdr->control.tx_complete = 1; |
| 96 | |
| 97 | if ((fc & IEEE80211_FTYPE_DATA) && |
| 98 | ((fc & IEEE80211_STYPE_QOS_DATA) || |
| 99 | (fc & IEEE80211_STYPE_QOS_NULLFUNC))) |
| 100 | tx_hdr->control.qos = 1; |
| 101 | } |
| 102 | |
| 103 | /* RSN + MIC = 8 + 8 = 16 bytes (worst case - AES). */ |
| 104 | #define MAX_MSDU_SECURITY_LENGTH 16 |
| 105 | #define MAX_MPDU_SECURITY_LENGTH 16 |
| 106 | #define WLAN_QOS_HDR_LEN 26 |
| 107 | #define MAX_MPDU_HEADER_AND_SECURITY (MAX_MPDU_SECURITY_LENGTH + \ |
| 108 | WLAN_QOS_HDR_LEN) |
| 109 | #define HW_BLOCK_SIZE 252 |
Juuso Oikarinen | 9f2ad4f | 2009-06-12 14:15:54 +0300 | [diff] [blame] | 110 | static void wl1251_tx_frag_block_num(struct tx_double_buffer_desc *tx_hdr) |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 111 | { |
| 112 | u16 payload_len, frag_threshold, mem_blocks; |
| 113 | u16 num_mpdus, mem_blocks_per_frag; |
| 114 | |
| 115 | frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD; |
| 116 | tx_hdr->frag_threshold = cpu_to_le16(frag_threshold); |
| 117 | |
John W. Linville | 1ab36d6 | 2010-07-21 12:25:10 -0400 | [diff] [blame] | 118 | payload_len = le16_to_cpu(tx_hdr->length) + MAX_MSDU_SECURITY_LENGTH; |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 119 | |
| 120 | if (payload_len > frag_threshold) { |
| 121 | mem_blocks_per_frag = |
| 122 | ((frag_threshold + MAX_MPDU_HEADER_AND_SECURITY) / |
| 123 | HW_BLOCK_SIZE) + 1; |
| 124 | num_mpdus = payload_len / frag_threshold; |
| 125 | mem_blocks = num_mpdus * mem_blocks_per_frag; |
| 126 | payload_len -= num_mpdus * frag_threshold; |
| 127 | num_mpdus++; |
| 128 | |
| 129 | } else { |
| 130 | mem_blocks_per_frag = 0; |
| 131 | mem_blocks = 0; |
| 132 | num_mpdus = 1; |
| 133 | } |
| 134 | |
| 135 | mem_blocks += (payload_len / HW_BLOCK_SIZE) + 1; |
| 136 | |
| 137 | if (num_mpdus > 1) |
| 138 | mem_blocks += min(num_mpdus, mem_blocks_per_frag); |
| 139 | |
| 140 | tx_hdr->num_mem_blocks = mem_blocks; |
| 141 | } |
| 142 | |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 143 | static int wl1251_tx_fill_hdr(struct wl1251 *wl, struct sk_buff *skb, |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 144 | struct ieee80211_tx_info *control) |
| 145 | { |
| 146 | struct tx_double_buffer_desc *tx_hdr; |
| 147 | struct ieee80211_rate *rate; |
| 148 | int id; |
| 149 | u16 fc; |
| 150 | |
| 151 | if (!skb) |
| 152 | return -EINVAL; |
| 153 | |
Juuso Oikarinen | 9f2ad4f | 2009-06-12 14:15:54 +0300 | [diff] [blame] | 154 | id = wl1251_tx_id(wl, skb); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 155 | if (id < 0) |
| 156 | return id; |
| 157 | |
| 158 | fc = *(u16 *)skb->data; |
| 159 | tx_hdr = (struct tx_double_buffer_desc *) skb_push(skb, |
| 160 | sizeof(*tx_hdr)); |
| 161 | |
| 162 | tx_hdr->length = cpu_to_le16(skb->len - sizeof(*tx_hdr)); |
| 163 | rate = ieee80211_get_tx_rate(wl->hw, control); |
| 164 | tx_hdr->rate = cpu_to_le16(rate->hw_value); |
| 165 | tx_hdr->expiry_time = cpu_to_le32(1 << 16); |
| 166 | tx_hdr->id = id; |
| 167 | |
Kalle Valo | 49e1b9f | 2009-11-30 10:18:33 +0200 | [diff] [blame] | 168 | tx_hdr->xmit_queue = wl1251_tx_get_queue(skb_get_queue_mapping(skb)); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 169 | |
Juuso Oikarinen | 9f2ad4f | 2009-06-12 14:15:54 +0300 | [diff] [blame] | 170 | wl1251_tx_control(tx_hdr, control, fc); |
| 171 | wl1251_tx_frag_block_num(tx_hdr); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 172 | |
| 173 | return 0; |
| 174 | } |
| 175 | |
| 176 | /* We copy the packet to the target */ |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 177 | static int wl1251_tx_send_packet(struct wl1251 *wl, struct sk_buff *skb, |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 178 | struct ieee80211_tx_info *control) |
| 179 | { |
| 180 | struct tx_double_buffer_desc *tx_hdr; |
| 181 | int len; |
| 182 | u32 addr; |
| 183 | |
| 184 | if (!skb) |
| 185 | return -EINVAL; |
| 186 | |
| 187 | tx_hdr = (struct tx_double_buffer_desc *) skb->data; |
| 188 | |
| 189 | if (control->control.hw_key && |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 190 | control->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) { |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 191 | int hdrlen; |
John W. Linville | 1ab36d6 | 2010-07-21 12:25:10 -0400 | [diff] [blame] | 192 | __le16 fc; |
| 193 | u16 length; |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 194 | u8 *pos; |
| 195 | |
John W. Linville | 1ab36d6 | 2010-07-21 12:25:10 -0400 | [diff] [blame] | 196 | fc = *(__le16 *)(skb->data + sizeof(*tx_hdr)); |
| 197 | length = le16_to_cpu(tx_hdr->length) + WL1251_TKIP_IV_SPACE; |
| 198 | tx_hdr->length = cpu_to_le16(length); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 199 | |
| 200 | hdrlen = ieee80211_hdrlen(fc); |
| 201 | |
Juuso Oikarinen | 9f2ad4f | 2009-06-12 14:15:54 +0300 | [diff] [blame] | 202 | pos = skb_push(skb, WL1251_TKIP_IV_SPACE); |
| 203 | memmove(pos, pos + WL1251_TKIP_IV_SPACE, |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 204 | sizeof(*tx_hdr) + hdrlen); |
| 205 | } |
| 206 | |
| 207 | /* Revisit. This is a workaround for getting non-aligned packets. |
| 208 | This happens at least with EAPOL packets from the user space. |
| 209 | Our DMA requires packets to be aligned on a 4-byte boundary. |
| 210 | */ |
| 211 | if (unlikely((long)skb->data & 0x03)) { |
| 212 | int offset = (4 - (long)skb->data) & 0x03; |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 213 | wl1251_debug(DEBUG_TX, "skb offset %d", offset); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 214 | |
| 215 | /* check whether the current skb can be used */ |
| 216 | if (!skb_cloned(skb) && (skb_tailroom(skb) >= offset)) { |
| 217 | unsigned char *src = skb->data; |
| 218 | |
| 219 | /* align the buffer on a 4-byte boundary */ |
| 220 | skb_reserve(skb, offset); |
| 221 | memmove(skb->data, src, skb->len); |
Kalle Valo | 46cb35f | 2009-11-30 10:18:40 +0200 | [diff] [blame] | 222 | tx_hdr = (struct tx_double_buffer_desc *) skb->data; |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 223 | } else { |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 224 | wl1251_info("No handler, fixme!"); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 225 | return -EINVAL; |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | /* Our skb->data at this point includes the HW header */ |
Juuso Oikarinen | 9f2ad4f | 2009-06-12 14:15:54 +0300 | [diff] [blame] | 230 | len = WL1251_TX_ALIGN(skb->len); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 231 | |
| 232 | if (wl->data_in_count & 0x1) |
| 233 | addr = wl->data_path->tx_packet_ring_addr + |
| 234 | wl->data_path->tx_packet_ring_chunk_size; |
| 235 | else |
| 236 | addr = wl->data_path->tx_packet_ring_addr; |
| 237 | |
Bob Copeland | 0764de6 | 2009-08-07 13:32:56 +0300 | [diff] [blame] | 238 | wl1251_mem_write(wl, addr, skb->data, len); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 239 | |
Kalle Valo | 49e1b9f | 2009-11-30 10:18:33 +0200 | [diff] [blame] | 240 | wl1251_debug(DEBUG_TX, "tx id %u skb 0x%p payload %u rate 0x%x " |
| 241 | "queue %d", tx_hdr->id, skb, tx_hdr->length, |
| 242 | tx_hdr->rate, tx_hdr->xmit_queue); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 243 | |
| 244 | return 0; |
| 245 | } |
| 246 | |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 247 | static void wl1251_tx_trigger(struct wl1251 *wl) |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 248 | { |
| 249 | u32 data, addr; |
| 250 | |
| 251 | if (wl->data_in_count & 0x1) { |
| 252 | addr = ACX_REG_INTERRUPT_TRIG_H; |
| 253 | data = INTR_TRIG_TX_PROC1; |
| 254 | } else { |
| 255 | addr = ACX_REG_INTERRUPT_TRIG; |
| 256 | data = INTR_TRIG_TX_PROC0; |
| 257 | } |
| 258 | |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 259 | wl1251_reg_write32(wl, addr, data); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 260 | |
| 261 | /* Bumping data in */ |
| 262 | wl->data_in_count = (wl->data_in_count + 1) & |
| 263 | TX_STATUS_DATA_OUT_COUNT_MASK; |
| 264 | } |
| 265 | |
| 266 | /* caller must hold wl->mutex */ |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 267 | static int wl1251_tx_frame(struct wl1251 *wl, struct sk_buff *skb) |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 268 | { |
| 269 | struct ieee80211_tx_info *info; |
| 270 | int ret = 0; |
| 271 | u8 idx; |
| 272 | |
| 273 | info = IEEE80211_SKB_CB(skb); |
| 274 | |
| 275 | if (info->control.hw_key) { |
| 276 | idx = info->control.hw_key->hw_key_idx; |
| 277 | if (unlikely(wl->default_key != idx)) { |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 278 | ret = wl1251_acx_default_key(wl, idx); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 279 | if (ret < 0) |
| 280 | return ret; |
| 281 | } |
| 282 | } |
| 283 | |
Juuso Oikarinen | 9f2ad4f | 2009-06-12 14:15:54 +0300 | [diff] [blame] | 284 | ret = wl1251_tx_path_status(wl); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 285 | if (ret < 0) |
| 286 | return ret; |
| 287 | |
Juuso Oikarinen | 9f2ad4f | 2009-06-12 14:15:54 +0300 | [diff] [blame] | 288 | ret = wl1251_tx_fill_hdr(wl, skb, info); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 289 | if (ret < 0) |
| 290 | return ret; |
| 291 | |
Juuso Oikarinen | 9f2ad4f | 2009-06-12 14:15:54 +0300 | [diff] [blame] | 292 | ret = wl1251_tx_send_packet(wl, skb, info); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 293 | if (ret < 0) |
| 294 | return ret; |
| 295 | |
Juuso Oikarinen | 9f2ad4f | 2009-06-12 14:15:54 +0300 | [diff] [blame] | 296 | wl1251_tx_trigger(wl); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 297 | |
| 298 | return ret; |
| 299 | } |
| 300 | |
Juuso Oikarinen | 9f2ad4f | 2009-06-12 14:15:54 +0300 | [diff] [blame] | 301 | void wl1251_tx_work(struct work_struct *work) |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 302 | { |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 303 | struct wl1251 *wl = container_of(work, struct wl1251, tx_work); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 304 | struct sk_buff *skb; |
| 305 | bool woken_up = false; |
| 306 | int ret; |
| 307 | |
| 308 | mutex_lock(&wl->mutex); |
| 309 | |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 310 | if (unlikely(wl->state == WL1251_STATE_OFF)) |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 311 | goto out; |
| 312 | |
| 313 | while ((skb = skb_dequeue(&wl->tx_queue))) { |
| 314 | if (!woken_up) { |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 315 | ret = wl1251_ps_elp_wakeup(wl); |
Kalle Valo | c5483b7 | 2009-06-12 14:16:32 +0300 | [diff] [blame] | 316 | if (ret < 0) |
| 317 | goto out; |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 318 | woken_up = true; |
| 319 | } |
| 320 | |
Juuso Oikarinen | 9f2ad4f | 2009-06-12 14:15:54 +0300 | [diff] [blame] | 321 | ret = wl1251_tx_frame(wl, skb); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 322 | if (ret == -EBUSY) { |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 323 | skb_queue_head(&wl->tx_queue, skb); |
| 324 | goto out; |
| 325 | } else if (ret < 0) { |
| 326 | dev_kfree_skb(skb); |
| 327 | goto out; |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | out: |
| 332 | if (woken_up) |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 333 | wl1251_ps_elp_sleep(wl); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 334 | |
| 335 | mutex_unlock(&wl->mutex); |
| 336 | } |
| 337 | |
Juuso Oikarinen | 9f2ad4f | 2009-06-12 14:15:54 +0300 | [diff] [blame] | 338 | static const char *wl1251_tx_parse_status(u8 status) |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 339 | { |
| 340 | /* 8 bit status field, one character per bit plus null */ |
| 341 | static char buf[9]; |
| 342 | int i = 0; |
| 343 | |
| 344 | memset(buf, 0, sizeof(buf)); |
| 345 | |
| 346 | if (status & TX_DMA_ERROR) |
| 347 | buf[i++] = 'm'; |
| 348 | if (status & TX_DISABLED) |
| 349 | buf[i++] = 'd'; |
| 350 | if (status & TX_RETRY_EXCEEDED) |
| 351 | buf[i++] = 'r'; |
| 352 | if (status & TX_TIMEOUT) |
| 353 | buf[i++] = 't'; |
| 354 | if (status & TX_KEY_NOT_FOUND) |
| 355 | buf[i++] = 'k'; |
| 356 | if (status & TX_ENCRYPT_FAIL) |
| 357 | buf[i++] = 'e'; |
| 358 | if (status & TX_UNAVAILABLE_PRIORITY) |
| 359 | buf[i++] = 'p'; |
| 360 | |
| 361 | /* bit 0 is unused apparently */ |
| 362 | |
| 363 | return buf; |
| 364 | } |
| 365 | |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 366 | static void wl1251_tx_packet_cb(struct wl1251 *wl, |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 367 | struct tx_result *result) |
| 368 | { |
| 369 | struct ieee80211_tx_info *info; |
| 370 | struct sk_buff *skb; |
| 371 | int hdrlen, ret; |
| 372 | u8 *frame; |
| 373 | |
| 374 | skb = wl->tx_frames[result->id]; |
| 375 | if (skb == NULL) { |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 376 | wl1251_error("SKB for packet %d is NULL", result->id); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 377 | return; |
| 378 | } |
| 379 | |
| 380 | info = IEEE80211_SKB_CB(skb); |
| 381 | |
| 382 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && |
| 383 | (result->status == TX_SUCCESS)) |
| 384 | info->flags |= IEEE80211_TX_STAT_ACK; |
| 385 | |
| 386 | info->status.rates[0].count = result->ack_failures + 1; |
| 387 | wl->stats.retry_count += result->ack_failures; |
| 388 | |
| 389 | /* |
| 390 | * We have to remove our private TX header before pushing |
| 391 | * the skb back to mac80211. |
| 392 | */ |
| 393 | frame = skb_pull(skb, sizeof(struct tx_double_buffer_desc)); |
| 394 | if (info->control.hw_key && |
Johannes Berg | 97359d1 | 2010-08-10 09:46:38 +0200 | [diff] [blame] | 395 | info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) { |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 396 | hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
Juuso Oikarinen | 9f2ad4f | 2009-06-12 14:15:54 +0300 | [diff] [blame] | 397 | memmove(frame + WL1251_TKIP_IV_SPACE, frame, hdrlen); |
| 398 | skb_pull(skb, WL1251_TKIP_IV_SPACE); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 399 | } |
| 400 | |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 401 | wl1251_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x" |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 402 | " status 0x%x (%s)", |
| 403 | result->id, skb, result->ack_failures, result->rate, |
Juuso Oikarinen | 9f2ad4f | 2009-06-12 14:15:54 +0300 | [diff] [blame] | 404 | result->status, wl1251_tx_parse_status(result->status)); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 405 | |
| 406 | |
| 407 | ieee80211_tx_status(wl->hw, skb); |
| 408 | |
| 409 | wl->tx_frames[result->id] = NULL; |
| 410 | |
| 411 | if (wl->tx_queue_stopped) { |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 412 | wl1251_debug(DEBUG_TX, "cb: queue was stopped"); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 413 | |
| 414 | skb = skb_dequeue(&wl->tx_queue); |
| 415 | |
| 416 | /* The skb can be NULL because tx_work might have been |
| 417 | scheduled before the queue was stopped making the |
| 418 | queue empty */ |
| 419 | |
| 420 | if (skb) { |
Juuso Oikarinen | 9f2ad4f | 2009-06-12 14:15:54 +0300 | [diff] [blame] | 421 | ret = wl1251_tx_frame(wl, skb); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 422 | if (ret == -EBUSY) { |
| 423 | /* firmware buffer is still full */ |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 424 | wl1251_debug(DEBUG_TX, "cb: fw buffer " |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 425 | "still full"); |
| 426 | skb_queue_head(&wl->tx_queue, skb); |
| 427 | return; |
| 428 | } else if (ret < 0) { |
| 429 | dev_kfree_skb(skb); |
| 430 | return; |
| 431 | } |
| 432 | } |
| 433 | |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 434 | wl1251_debug(DEBUG_TX, "cb: waking queues"); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 435 | ieee80211_wake_queues(wl->hw); |
| 436 | wl->tx_queue_stopped = false; |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | /* Called upon reception of a TX complete interrupt */ |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 441 | void wl1251_tx_complete(struct wl1251 *wl) |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 442 | { |
| 443 | int i, result_index, num_complete = 0; |
| 444 | struct tx_result result[FW_TX_CMPLT_BLOCK_SIZE], *result_ptr; |
Denis 'GNUtoo' Carikli | 9df86e2 | 2010-08-27 23:48:19 +0200 | [diff] [blame] | 445 | unsigned long flags; |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 446 | |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 447 | if (unlikely(wl->state != WL1251_STATE_ON)) |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 448 | return; |
| 449 | |
| 450 | /* First we read the result */ |
Bob Copeland | 0764de6 | 2009-08-07 13:32:56 +0300 | [diff] [blame] | 451 | wl1251_mem_read(wl, wl->data_path->tx_complete_addr, |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 452 | result, sizeof(result)); |
| 453 | |
| 454 | result_index = wl->next_tx_complete; |
| 455 | |
| 456 | for (i = 0; i < ARRAY_SIZE(result); i++) { |
| 457 | result_ptr = &result[result_index]; |
| 458 | |
| 459 | if (result_ptr->done_1 == 1 && |
| 460 | result_ptr->done_2 == 1) { |
Juuso Oikarinen | 9f2ad4f | 2009-06-12 14:15:54 +0300 | [diff] [blame] | 461 | wl1251_tx_packet_cb(wl, result_ptr); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 462 | |
| 463 | result_ptr->done_1 = 0; |
| 464 | result_ptr->done_2 = 0; |
| 465 | |
| 466 | result_index = (result_index + 1) & |
| 467 | (FW_TX_CMPLT_BLOCK_SIZE - 1); |
| 468 | num_complete++; |
| 469 | } else { |
| 470 | break; |
| 471 | } |
| 472 | } |
| 473 | |
Denis 'GNUtoo' Carikli | 9df86e2 | 2010-08-27 23:48:19 +0200 | [diff] [blame] | 474 | if (wl->tx_queue_stopped |
| 475 | && |
| 476 | skb_queue_len(&wl->tx_queue) <= WL1251_TX_QUEUE_LOW_WATERMARK){ |
| 477 | |
| 478 | /* firmware buffer has space, restart queues */ |
| 479 | wl1251_debug(DEBUG_TX, "tx_complete: waking queues"); |
| 480 | spin_lock_irqsave(&wl->wl_lock, flags); |
| 481 | ieee80211_wake_queues(wl->hw); |
| 482 | wl->tx_queue_stopped = false; |
| 483 | spin_unlock_irqrestore(&wl->wl_lock, flags); |
| 484 | ieee80211_queue_work(wl->hw, &wl->tx_work); |
| 485 | |
| 486 | } |
| 487 | |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 488 | /* Every completed frame needs to be acknowledged */ |
| 489 | if (num_complete) { |
| 490 | /* |
| 491 | * If we've wrapped, we have to clear |
| 492 | * the results in 2 steps. |
| 493 | */ |
| 494 | if (result_index > wl->next_tx_complete) { |
| 495 | /* Only 1 write is needed */ |
Bob Copeland | 0764de6 | 2009-08-07 13:32:56 +0300 | [diff] [blame] | 496 | wl1251_mem_write(wl, |
| 497 | wl->data_path->tx_complete_addr + |
| 498 | (wl->next_tx_complete * |
| 499 | sizeof(struct tx_result)), |
| 500 | &result[wl->next_tx_complete], |
| 501 | num_complete * |
| 502 | sizeof(struct tx_result)); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 503 | |
| 504 | |
| 505 | } else if (result_index < wl->next_tx_complete) { |
| 506 | /* 2 writes are needed */ |
Bob Copeland | 0764de6 | 2009-08-07 13:32:56 +0300 | [diff] [blame] | 507 | wl1251_mem_write(wl, |
| 508 | wl->data_path->tx_complete_addr + |
| 509 | (wl->next_tx_complete * |
| 510 | sizeof(struct tx_result)), |
| 511 | &result[wl->next_tx_complete], |
| 512 | (FW_TX_CMPLT_BLOCK_SIZE - |
| 513 | wl->next_tx_complete) * |
| 514 | sizeof(struct tx_result)); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 515 | |
Bob Copeland | 0764de6 | 2009-08-07 13:32:56 +0300 | [diff] [blame] | 516 | wl1251_mem_write(wl, |
| 517 | wl->data_path->tx_complete_addr, |
| 518 | result, |
| 519 | (num_complete - |
| 520 | FW_TX_CMPLT_BLOCK_SIZE + |
| 521 | wl->next_tx_complete) * |
| 522 | sizeof(struct tx_result)); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 523 | |
| 524 | } else { |
| 525 | /* We have to write the whole array */ |
Bob Copeland | 0764de6 | 2009-08-07 13:32:56 +0300 | [diff] [blame] | 526 | wl1251_mem_write(wl, |
| 527 | wl->data_path->tx_complete_addr, |
| 528 | result, |
| 529 | FW_TX_CMPLT_BLOCK_SIZE * |
| 530 | sizeof(struct tx_result)); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 531 | } |
| 532 | |
| 533 | } |
| 534 | |
| 535 | wl->next_tx_complete = result_index; |
| 536 | } |
| 537 | |
| 538 | /* caller must hold wl->mutex */ |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 539 | void wl1251_tx_flush(struct wl1251 *wl) |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 540 | { |
| 541 | int i; |
| 542 | struct sk_buff *skb; |
| 543 | struct ieee80211_tx_info *info; |
| 544 | |
| 545 | /* TX failure */ |
| 546 | /* control->flags = 0; FIXME */ |
| 547 | |
| 548 | while ((skb = skb_dequeue(&wl->tx_queue))) { |
| 549 | info = IEEE80211_SKB_CB(skb); |
| 550 | |
Kalle Valo | 80301cd | 2009-06-12 14:17:39 +0300 | [diff] [blame] | 551 | wl1251_debug(DEBUG_TX, "flushing skb 0x%p", skb); |
Kalle Valo | 2f01a1f | 2009-04-29 23:33:31 +0300 | [diff] [blame] | 552 | |
| 553 | if (!(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)) |
| 554 | continue; |
| 555 | |
| 556 | ieee80211_tx_status(wl->hw, skb); |
| 557 | } |
| 558 | |
| 559 | for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++) |
| 560 | if (wl->tx_frames[i] != NULL) { |
| 561 | skb = wl->tx_frames[i]; |
| 562 | info = IEEE80211_SKB_CB(skb); |
| 563 | |
| 564 | if (!(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)) |
| 565 | continue; |
| 566 | |
| 567 | ieee80211_tx_status(wl->hw, skb); |
| 568 | wl->tx_frames[i] = NULL; |
| 569 | } |
| 570 | } |