Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1 | /* |
Ivo van Doorn | 7e613e1 | 2010-08-06 20:45:38 +0200 | [diff] [blame] | 2 | Copyright (C) 2010 Willow Garage <http://www.willowgarage.com> |
| 3 | Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com> |
Gertjan van Wingerde | 9c9a0d1 | 2009-11-08 16:39:55 +0100 | [diff] [blame] | 4 | Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com> |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 5 | <http://rt2x00.serialmonkey.com> |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the |
| 19 | Free Software Foundation, Inc., |
| 20 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 21 | */ |
| 22 | |
| 23 | /* |
| 24 | Module: rt2x00lib |
| 25 | Abstract: rt2x00 queue specific routines. |
| 26 | */ |
| 27 | |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 28 | #include <linux/slab.h> |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 29 | #include <linux/kernel.h> |
| 30 | #include <linux/module.h> |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 31 | #include <linux/dma-mapping.h> |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 32 | |
| 33 | #include "rt2x00.h" |
| 34 | #include "rt2x00lib.h" |
| 35 | |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 36 | struct sk_buff *rt2x00queue_alloc_rxskb(struct rt2x00_dev *rt2x00dev, |
| 37 | struct queue_entry *entry) |
Gertjan van Wingerde | 239c249 | 2008-06-06 22:54:12 +0200 | [diff] [blame] | 38 | { |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 39 | struct sk_buff *skb; |
| 40 | struct skb_frame_desc *skbdesc; |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 41 | unsigned int frame_size; |
| 42 | unsigned int head_size = 0; |
| 43 | unsigned int tail_size = 0; |
Gertjan van Wingerde | 239c249 | 2008-06-06 22:54:12 +0200 | [diff] [blame] | 44 | |
| 45 | /* |
| 46 | * The frame size includes descriptor size, because the |
| 47 | * hardware directly receive the frame into the skbuffer. |
| 48 | */ |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 49 | frame_size = entry->queue->data_size + entry->queue->desc_size; |
Gertjan van Wingerde | 239c249 | 2008-06-06 22:54:12 +0200 | [diff] [blame] | 50 | |
| 51 | /* |
Ivo van Doorn | ff35239 | 2008-07-04 14:56:07 +0200 | [diff] [blame] | 52 | * The payload should be aligned to a 4-byte boundary, |
| 53 | * this means we need at least 3 bytes for moving the frame |
| 54 | * into the correct offset. |
Gertjan van Wingerde | 239c249 | 2008-06-06 22:54:12 +0200 | [diff] [blame] | 55 | */ |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 56 | head_size = 4; |
| 57 | |
| 58 | /* |
| 59 | * For IV/EIV/ICV assembly we must make sure there is |
| 60 | * at least 8 bytes bytes available in headroom for IV/EIV |
Ivo van Doorn | 9c3444d | 2008-12-03 17:29:48 +0100 | [diff] [blame] | 61 | * and 8 bytes for ICV data as tailroon. |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 62 | */ |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 63 | if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags)) { |
| 64 | head_size += 8; |
Ivo van Doorn | 9c3444d | 2008-12-03 17:29:48 +0100 | [diff] [blame] | 65 | tail_size += 8; |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 66 | } |
Gertjan van Wingerde | 239c249 | 2008-06-06 22:54:12 +0200 | [diff] [blame] | 67 | |
| 68 | /* |
| 69 | * Allocate skbuffer. |
| 70 | */ |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 71 | skb = dev_alloc_skb(frame_size + head_size + tail_size); |
Gertjan van Wingerde | 239c249 | 2008-06-06 22:54:12 +0200 | [diff] [blame] | 72 | if (!skb) |
| 73 | return NULL; |
| 74 | |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 75 | /* |
| 76 | * Make sure we not have a frame with the requested bytes |
| 77 | * available in the head and tail. |
| 78 | */ |
| 79 | skb_reserve(skb, head_size); |
Gertjan van Wingerde | 239c249 | 2008-06-06 22:54:12 +0200 | [diff] [blame] | 80 | skb_put(skb, frame_size); |
| 81 | |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 82 | /* |
| 83 | * Populate skbdesc. |
| 84 | */ |
| 85 | skbdesc = get_skb_frame_desc(skb); |
| 86 | memset(skbdesc, 0, sizeof(*skbdesc)); |
| 87 | skbdesc->entry = entry; |
| 88 | |
| 89 | if (test_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags)) { |
| 90 | skbdesc->skb_dma = dma_map_single(rt2x00dev->dev, |
| 91 | skb->data, |
| 92 | skb->len, |
| 93 | DMA_FROM_DEVICE); |
| 94 | skbdesc->flags |= SKBDESC_DMA_MAPPED_RX; |
| 95 | } |
| 96 | |
Gertjan van Wingerde | 239c249 | 2008-06-06 22:54:12 +0200 | [diff] [blame] | 97 | return skb; |
| 98 | } |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 99 | |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 100 | void rt2x00queue_map_txskb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb) |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 101 | { |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 102 | struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb); |
| 103 | |
Ivo van Doorn | 3ee54a0 | 2008-08-29 21:04:50 +0200 | [diff] [blame] | 104 | skbdesc->skb_dma = |
| 105 | dma_map_single(rt2x00dev->dev, skb->data, skb->len, DMA_TO_DEVICE); |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 106 | skbdesc->flags |= SKBDESC_DMA_MAPPED_TX; |
| 107 | } |
| 108 | EXPORT_SYMBOL_GPL(rt2x00queue_map_txskb); |
| 109 | |
| 110 | void rt2x00queue_unmap_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb) |
| 111 | { |
| 112 | struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb); |
| 113 | |
| 114 | if (skbdesc->flags & SKBDESC_DMA_MAPPED_RX) { |
| 115 | dma_unmap_single(rt2x00dev->dev, skbdesc->skb_dma, skb->len, |
| 116 | DMA_FROM_DEVICE); |
| 117 | skbdesc->flags &= ~SKBDESC_DMA_MAPPED_RX; |
| 118 | } |
| 119 | |
| 120 | if (skbdesc->flags & SKBDESC_DMA_MAPPED_TX) { |
Gertjan van Wingerde | 0b8004a | 2010-06-03 10:51:45 +0200 | [diff] [blame] | 121 | dma_unmap_single(rt2x00dev->dev, skbdesc->skb_dma, skb->len, |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 122 | DMA_TO_DEVICE); |
| 123 | skbdesc->flags &= ~SKBDESC_DMA_MAPPED_TX; |
| 124 | } |
| 125 | } |
Gertjan van Wingerde | 0b8004a | 2010-06-03 10:51:45 +0200 | [diff] [blame] | 126 | EXPORT_SYMBOL_GPL(rt2x00queue_unmap_skb); |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 127 | |
| 128 | void rt2x00queue_free_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb) |
| 129 | { |
Ivo van Doorn | 9a61319 | 2008-07-05 15:11:57 +0200 | [diff] [blame] | 130 | if (!skb) |
| 131 | return; |
| 132 | |
Ivo van Doorn | 61243d8 | 2008-06-20 22:10:53 +0200 | [diff] [blame] | 133 | rt2x00queue_unmap_skb(rt2x00dev, skb); |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 134 | dev_kfree_skb_any(skb); |
| 135 | } |
Gertjan van Wingerde | 239c249 | 2008-06-06 22:54:12 +0200 | [diff] [blame] | 136 | |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 137 | void rt2x00queue_align_frame(struct sk_buff *skb) |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 138 | { |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 139 | unsigned int frame_length = skb->len; |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 140 | unsigned int align = ALIGN_SIZE(skb, 0); |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 141 | |
| 142 | if (!align) |
| 143 | return; |
| 144 | |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 145 | skb_push(skb, align); |
| 146 | memmove(skb->data, skb->data + align, frame_length); |
| 147 | skb_trim(skb, frame_length); |
| 148 | } |
| 149 | |
Gertjan van Wingerde | 95d69aa | 2009-11-23 22:44:50 +0100 | [diff] [blame] | 150 | void rt2x00queue_align_payload(struct sk_buff *skb, unsigned int header_length) |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 151 | { |
| 152 | unsigned int frame_length = skb->len; |
Gertjan van Wingerde | 95d69aa | 2009-11-23 22:44:50 +0100 | [diff] [blame] | 153 | unsigned int align = ALIGN_SIZE(skb, header_length); |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 154 | |
| 155 | if (!align) |
| 156 | return; |
| 157 | |
| 158 | skb_push(skb, align); |
| 159 | memmove(skb->data, skb->data + align, frame_length); |
| 160 | skb_trim(skb, frame_length); |
| 161 | } |
| 162 | |
| 163 | void rt2x00queue_insert_l2pad(struct sk_buff *skb, unsigned int header_length) |
| 164 | { |
Gertjan van Wingerde | 2e33146 | 2009-12-04 23:47:03 +0100 | [diff] [blame] | 165 | unsigned int payload_length = skb->len - header_length; |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 166 | unsigned int header_align = ALIGN_SIZE(skb, 0); |
| 167 | unsigned int payload_align = ALIGN_SIZE(skb, header_length); |
Gertjan van Wingerde | e54be4e | 2009-12-04 23:47:07 +0100 | [diff] [blame] | 168 | unsigned int l2pad = payload_length ? L2PAD_SIZE(header_length) : 0; |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 169 | |
Gertjan van Wingerde | 2e33146 | 2009-12-04 23:47:03 +0100 | [diff] [blame] | 170 | /* |
| 171 | * Adjust the header alignment if the payload needs to be moved more |
| 172 | * than the header. |
| 173 | */ |
| 174 | if (payload_align > header_align) |
| 175 | header_align += 4; |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 176 | |
Gertjan van Wingerde | 2e33146 | 2009-12-04 23:47:03 +0100 | [diff] [blame] | 177 | /* There is nothing to do if no alignment is needed */ |
| 178 | if (!header_align) |
| 179 | return; |
| 180 | |
| 181 | /* Reserve the amount of space needed in front of the frame */ |
| 182 | skb_push(skb, header_align); |
| 183 | |
| 184 | /* |
| 185 | * Move the header. |
| 186 | */ |
| 187 | memmove(skb->data, skb->data + header_align, header_length); |
| 188 | |
| 189 | /* Move the payload, if present and if required */ |
| 190 | if (payload_length && payload_align) |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 191 | memmove(skb->data + header_length + l2pad, |
Gertjan van Wingerde | a5186e9 | 2009-11-24 23:11:32 +0100 | [diff] [blame] | 192 | skb->data + header_length + l2pad + payload_align, |
Gertjan van Wingerde | 2e33146 | 2009-12-04 23:47:03 +0100 | [diff] [blame] | 193 | payload_length); |
| 194 | |
| 195 | /* Trim the skb to the correct size */ |
| 196 | skb_trim(skb, header_length + l2pad + payload_length); |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 197 | } |
| 198 | |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 199 | void rt2x00queue_remove_l2pad(struct sk_buff *skb, unsigned int header_length) |
| 200 | { |
Gertjan van Wingerde | 77e73d1 | 2009-12-04 23:47:01 +0100 | [diff] [blame] | 201 | unsigned int l2pad = L2PAD_SIZE(header_length); |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 202 | |
Gertjan van Wingerde | 354e39d | 2009-12-04 23:47:02 +0100 | [diff] [blame] | 203 | if (!l2pad) |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 204 | return; |
| 205 | |
| 206 | memmove(skb->data + l2pad, skb->data, header_length); |
| 207 | skb_pull(skb, l2pad); |
| 208 | } |
| 209 | |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 210 | static void rt2x00queue_create_tx_descriptor_seq(struct queue_entry *entry, |
| 211 | struct txentry_desc *txdesc) |
| 212 | { |
| 213 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb); |
| 214 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)entry->skb->data; |
| 215 | struct rt2x00_intf *intf = vif_to_intf(tx_info->control.vif); |
| 216 | unsigned long irqflags; |
| 217 | |
| 218 | if (!(tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) || |
| 219 | unlikely(!tx_info->control.vif)) |
| 220 | return; |
| 221 | |
| 222 | /* |
| 223 | * Hardware should insert sequence counter. |
| 224 | * FIXME: We insert a software sequence counter first for |
| 225 | * hardware that doesn't support hardware sequence counting. |
| 226 | * |
| 227 | * This is wrong because beacons are not getting sequence |
| 228 | * numbers assigned properly. |
| 229 | * |
| 230 | * A secondary problem exists for drivers that cannot toggle |
| 231 | * sequence counting per-frame, since those will override the |
| 232 | * sequence counter given by mac80211. |
| 233 | */ |
| 234 | spin_lock_irqsave(&intf->seqlock, irqflags); |
| 235 | |
| 236 | if (test_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc->flags)) |
| 237 | intf->seqno += 0x10; |
| 238 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); |
| 239 | hdr->seq_ctrl |= cpu_to_le16(intf->seqno); |
| 240 | |
| 241 | spin_unlock_irqrestore(&intf->seqlock, irqflags); |
| 242 | |
| 243 | __set_bit(ENTRY_TXD_GENERATE_SEQ, &txdesc->flags); |
| 244 | } |
| 245 | |
| 246 | static void rt2x00queue_create_tx_descriptor_plcp(struct queue_entry *entry, |
| 247 | struct txentry_desc *txdesc, |
| 248 | const struct rt2x00_rate *hwrate) |
| 249 | { |
| 250 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
| 251 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb); |
| 252 | struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0]; |
| 253 | unsigned int data_length; |
| 254 | unsigned int duration; |
| 255 | unsigned int residual; |
| 256 | |
| 257 | /* Data length + CRC + Crypto overhead (IV/EIV/ICV/MIC) */ |
| 258 | data_length = entry->skb->len + 4; |
| 259 | data_length += rt2x00crypto_tx_overhead(rt2x00dev, entry->skb); |
| 260 | |
| 261 | /* |
| 262 | * PLCP setup |
| 263 | * Length calculation depends on OFDM/CCK rate. |
| 264 | */ |
| 265 | txdesc->signal = hwrate->plcp; |
| 266 | txdesc->service = 0x04; |
| 267 | |
| 268 | if (hwrate->flags & DEV_RATE_OFDM) { |
| 269 | txdesc->length_high = (data_length >> 6) & 0x3f; |
| 270 | txdesc->length_low = data_length & 0x3f; |
| 271 | } else { |
| 272 | /* |
| 273 | * Convert length to microseconds. |
| 274 | */ |
| 275 | residual = GET_DURATION_RES(data_length, hwrate->bitrate); |
| 276 | duration = GET_DURATION(data_length, hwrate->bitrate); |
| 277 | |
| 278 | if (residual != 0) { |
| 279 | duration++; |
| 280 | |
| 281 | /* |
| 282 | * Check if we need to set the Length Extension |
| 283 | */ |
| 284 | if (hwrate->bitrate == 110 && residual <= 30) |
| 285 | txdesc->service |= 0x80; |
| 286 | } |
| 287 | |
| 288 | txdesc->length_high = (duration >> 8) & 0xff; |
| 289 | txdesc->length_low = duration & 0xff; |
| 290 | |
| 291 | /* |
| 292 | * When preamble is enabled we should set the |
| 293 | * preamble bit for the signal. |
| 294 | */ |
| 295 | if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) |
| 296 | txdesc->signal |= 0x08; |
| 297 | } |
| 298 | } |
| 299 | |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 300 | static void rt2x00queue_create_tx_descriptor(struct queue_entry *entry, |
| 301 | struct txentry_desc *txdesc) |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 302 | { |
Johannes Berg | 2e92e6f | 2008-05-15 12:55:27 +0200 | [diff] [blame] | 303 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 304 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb); |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 305 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)entry->skb->data; |
Johannes Berg | 2e92e6f | 2008-05-15 12:55:27 +0200 | [diff] [blame] | 306 | struct ieee80211_rate *rate = |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 307 | ieee80211_get_tx_rate(rt2x00dev->hw, tx_info); |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 308 | const struct rt2x00_rate *hwrate; |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 309 | |
| 310 | memset(txdesc, 0, sizeof(*txdesc)); |
| 311 | |
| 312 | /* |
| 313 | * Initialize information from queue |
| 314 | */ |
Helmut Schaa | a908a74 | 2010-08-30 21:12:24 +0200 | [diff] [blame] | 315 | txdesc->qid = entry->queue->qid; |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 316 | txdesc->cw_min = entry->queue->cw_min; |
| 317 | txdesc->cw_max = entry->queue->cw_max; |
| 318 | txdesc->aifs = entry->queue->aifs; |
| 319 | |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 320 | /* |
Gertjan van Wingerde | df624ca | 2010-05-03 22:43:05 +0200 | [diff] [blame] | 321 | * Header and frame information. |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 322 | */ |
Gertjan van Wingerde | df624ca | 2010-05-03 22:43:05 +0200 | [diff] [blame] | 323 | txdesc->length = entry->skb->len; |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 324 | txdesc->header_length = ieee80211_get_hdrlen_from_skb(entry->skb); |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 325 | |
| 326 | /* |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 327 | * Check whether this frame is to be acked. |
| 328 | */ |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 329 | if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 330 | __set_bit(ENTRY_TXD_ACK, &txdesc->flags); |
| 331 | |
| 332 | /* |
| 333 | * Check if this is a RTS/CTS frame |
| 334 | */ |
Ivo van Doorn | ac10446 | 2008-06-16 19:54:57 +0200 | [diff] [blame] | 335 | if (ieee80211_is_rts(hdr->frame_control) || |
| 336 | ieee80211_is_cts(hdr->frame_control)) { |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 337 | __set_bit(ENTRY_TXD_BURST, &txdesc->flags); |
Ivo van Doorn | ac10446 | 2008-06-16 19:54:57 +0200 | [diff] [blame] | 338 | if (ieee80211_is_rts(hdr->frame_control)) |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 339 | __set_bit(ENTRY_TXD_RTS_FRAME, &txdesc->flags); |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 340 | else |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 341 | __set_bit(ENTRY_TXD_CTS_FRAME, &txdesc->flags); |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 342 | if (tx_info->control.rts_cts_rate_idx >= 0) |
Johannes Berg | 2e92e6f | 2008-05-15 12:55:27 +0200 | [diff] [blame] | 343 | rate = |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 344 | ieee80211_get_rts_cts_rate(rt2x00dev->hw, tx_info); |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | /* |
| 348 | * Determine retry information. |
| 349 | */ |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 350 | txdesc->retry_limit = tx_info->control.rates[0].count - 1; |
Ivo van Doorn | 42c8285 | 2008-12-02 18:20:04 +0100 | [diff] [blame] | 351 | if (txdesc->retry_limit >= rt2x00dev->long_retry) |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 352 | __set_bit(ENTRY_TXD_RETRY_MODE, &txdesc->flags); |
| 353 | |
| 354 | /* |
| 355 | * Check if more fragments are pending |
| 356 | */ |
Helmut Schaa | 2606e42 | 2010-06-14 22:10:09 +0200 | [diff] [blame] | 357 | if (ieee80211_has_morefrags(hdr->frame_control)) { |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 358 | __set_bit(ENTRY_TXD_BURST, &txdesc->flags); |
| 359 | __set_bit(ENTRY_TXD_MORE_FRAG, &txdesc->flags); |
| 360 | } |
| 361 | |
| 362 | /* |
Helmut Schaa | 2606e42 | 2010-06-14 22:10:09 +0200 | [diff] [blame] | 363 | * Check if more frames (!= fragments) are pending |
| 364 | */ |
| 365 | if (tx_info->flags & IEEE80211_TX_CTL_MORE_FRAMES) |
| 366 | __set_bit(ENTRY_TXD_BURST, &txdesc->flags); |
| 367 | |
| 368 | /* |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 369 | * Beacons and probe responses require the tsf timestamp |
Alban Browaeys | e81e0ae | 2009-12-04 23:46:59 +0100 | [diff] [blame] | 370 | * to be inserted into the frame, except for a frame that has been injected |
| 371 | * through a monitor interface. This latter is needed for testing a |
| 372 | * monitor interface. |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 373 | */ |
Alban Browaeys | e81e0ae | 2009-12-04 23:46:59 +0100 | [diff] [blame] | 374 | if ((ieee80211_is_beacon(hdr->frame_control) || |
| 375 | ieee80211_is_probe_resp(hdr->frame_control)) && |
| 376 | (!(tx_info->flags & IEEE80211_TX_CTL_INJECTED))) |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 377 | __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc->flags); |
| 378 | |
| 379 | /* |
| 380 | * Determine with what IFS priority this frame should be send. |
| 381 | * Set ifs to IFS_SIFS when the this is not the first fragment, |
| 382 | * or this fragment came after RTS/CTS. |
| 383 | */ |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 384 | if ((tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) && |
| 385 | !test_bit(ENTRY_TXD_RTS_FRAME, &txdesc->flags)) { |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 386 | __set_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc->flags); |
| 387 | txdesc->ifs = IFS_BACKOFF; |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 388 | } else |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 389 | txdesc->ifs = IFS_SIFS; |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 390 | |
Ivo van Doorn | 076f958 | 2008-12-20 10:59:02 +0100 | [diff] [blame] | 391 | /* |
| 392 | * Determine rate modulation. |
| 393 | */ |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 394 | hwrate = rt2x00_get_rate(rate->hw_value); |
Ivo van Doorn | 076f958 | 2008-12-20 10:59:02 +0100 | [diff] [blame] | 395 | txdesc->rate_mode = RATE_MODE_CCK; |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 396 | if (hwrate->flags & DEV_RATE_OFDM) |
Ivo van Doorn | 076f958 | 2008-12-20 10:59:02 +0100 | [diff] [blame] | 397 | txdesc->rate_mode = RATE_MODE_OFDM; |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 398 | |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 399 | /* |
| 400 | * Apply TX descriptor handling by components |
| 401 | */ |
| 402 | rt2x00crypto_create_tx_descriptor(entry, txdesc); |
Ivo van Doorn | 35f00cf | 2009-04-26 16:09:32 +0200 | [diff] [blame] | 403 | rt2x00ht_create_tx_descriptor(entry, txdesc, hwrate); |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 404 | rt2x00queue_create_tx_descriptor_seq(entry, txdesc); |
| 405 | rt2x00queue_create_tx_descriptor_plcp(entry, txdesc, hwrate); |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 406 | } |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 407 | |
Gertjan van Wingerde | 78eea11 | 2010-06-29 21:41:05 +0200 | [diff] [blame] | 408 | static int rt2x00queue_write_tx_data(struct queue_entry *entry, |
| 409 | struct txentry_desc *txdesc) |
| 410 | { |
| 411 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
| 412 | |
| 413 | /* |
| 414 | * This should not happen, we already checked the entry |
| 415 | * was ours. When the hardware disagrees there has been |
| 416 | * a queue corruption! |
| 417 | */ |
| 418 | if (unlikely(rt2x00dev->ops->lib->get_entry_state && |
| 419 | rt2x00dev->ops->lib->get_entry_state(entry))) { |
| 420 | ERROR(rt2x00dev, |
| 421 | "Corrupt queue %d, accessing entry which is not ours.\n" |
| 422 | "Please file bug report to %s.\n", |
| 423 | entry->queue->qid, DRV_PROJECT); |
| 424 | return -EINVAL; |
| 425 | } |
| 426 | |
| 427 | /* |
| 428 | * Add the requested extra tx headroom in front of the skb. |
| 429 | */ |
| 430 | skb_push(entry->skb, rt2x00dev->ops->extra_tx_headroom); |
| 431 | memset(entry->skb->data, 0, rt2x00dev->ops->extra_tx_headroom); |
| 432 | |
| 433 | /* |
Gertjan van Wingerde | 76dd5dd | 2010-06-29 21:42:23 +0200 | [diff] [blame] | 434 | * Call the driver's write_tx_data function, if it exists. |
Gertjan van Wingerde | 78eea11 | 2010-06-29 21:41:05 +0200 | [diff] [blame] | 435 | */ |
Gertjan van Wingerde | 76dd5dd | 2010-06-29 21:42:23 +0200 | [diff] [blame] | 436 | if (rt2x00dev->ops->lib->write_tx_data) |
| 437 | rt2x00dev->ops->lib->write_tx_data(entry, txdesc); |
Gertjan van Wingerde | 78eea11 | 2010-06-29 21:41:05 +0200 | [diff] [blame] | 438 | |
| 439 | /* |
| 440 | * Map the skb to DMA. |
| 441 | */ |
| 442 | if (test_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags)) |
| 443 | rt2x00queue_map_txskb(rt2x00dev, entry->skb); |
| 444 | |
| 445 | return 0; |
| 446 | } |
| 447 | |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 448 | static void rt2x00queue_write_tx_descriptor(struct queue_entry *entry, |
| 449 | struct txentry_desc *txdesc) |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 450 | { |
Ivo van Doorn | b869767 | 2008-06-06 22:53:14 +0200 | [diff] [blame] | 451 | struct data_queue *queue = entry->queue; |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 452 | |
Ivo van Doorn | 9333145 | 2010-08-23 19:53:39 +0200 | [diff] [blame] | 453 | queue->rt2x00dev->ops->lib->write_tx_desc(entry, txdesc); |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 454 | |
| 455 | /* |
| 456 | * All processing on the frame has been completed, this means |
| 457 | * it is now ready to be dumped to userspace through debugfs. |
| 458 | */ |
Ivo van Doorn | 9333145 | 2010-08-23 19:53:39 +0200 | [diff] [blame] | 459 | rt2x00debug_dump_frame(queue->rt2x00dev, DUMP_FRAME_TX, entry->skb); |
Gertjan van Wingerde | 6295d81 | 2010-05-09 21:24:22 +0200 | [diff] [blame] | 460 | } |
| 461 | |
| 462 | static void rt2x00queue_kick_tx_queue(struct queue_entry *entry, |
| 463 | struct txentry_desc *txdesc) |
| 464 | { |
| 465 | struct data_queue *queue = entry->queue; |
| 466 | struct rt2x00_dev *rt2x00dev = queue->rt2x00dev; |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 467 | |
| 468 | /* |
Ivo van Doorn | b869767 | 2008-06-06 22:53:14 +0200 | [diff] [blame] | 469 | * Check if we need to kick the queue, there are however a few rules |
Gertjan van Wingerde | 6295d81 | 2010-05-09 21:24:22 +0200 | [diff] [blame] | 470 | * 1) Don't kick unless this is the last in frame in a burst. |
Ivo van Doorn | b869767 | 2008-06-06 22:53:14 +0200 | [diff] [blame] | 471 | * When the burst flag is set, this frame is always followed |
| 472 | * by another frame which in some way are related to eachother. |
| 473 | * This is true for fragments, RTS or CTS-to-self frames. |
Gertjan van Wingerde | 6295d81 | 2010-05-09 21:24:22 +0200 | [diff] [blame] | 474 | * 2) Rule 1 can be broken when the available entries |
Ivo van Doorn | b869767 | 2008-06-06 22:53:14 +0200 | [diff] [blame] | 475 | * in the queue are less then a certain threshold. |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 476 | */ |
Ivo van Doorn | b869767 | 2008-06-06 22:53:14 +0200 | [diff] [blame] | 477 | if (rt2x00queue_threshold(queue) || |
| 478 | !test_bit(ENTRY_TXD_BURST, &txdesc->flags)) |
Ivo van Doorn | 9333145 | 2010-08-23 19:53:39 +0200 | [diff] [blame] | 479 | rt2x00dev->ops->lib->kick_tx_queue(queue); |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 480 | } |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 481 | |
Johannes Berg | 7351c6b | 2009-11-19 01:08:30 +0100 | [diff] [blame] | 482 | int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb, |
| 483 | bool local) |
Ivo van Doorn | 6db3786 | 2008-06-06 22:50:28 +0200 | [diff] [blame] | 484 | { |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 485 | struct ieee80211_tx_info *tx_info; |
Ivo van Doorn | 6db3786 | 2008-06-06 22:50:28 +0200 | [diff] [blame] | 486 | struct queue_entry *entry = rt2x00queue_get_entry(queue, Q_INDEX); |
| 487 | struct txentry_desc txdesc; |
Ivo van Doorn | d74f5ba | 2008-06-16 19:56:54 +0200 | [diff] [blame] | 488 | struct skb_frame_desc *skbdesc; |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 489 | u8 rate_idx, rate_flags; |
Ivo van Doorn | 6db3786 | 2008-06-06 22:50:28 +0200 | [diff] [blame] | 490 | |
| 491 | if (unlikely(rt2x00queue_full(queue))) |
Ivo van Doorn | 0e3de99 | 2008-11-12 00:01:37 +0100 | [diff] [blame] | 492 | return -ENOBUFS; |
Ivo van Doorn | 6db3786 | 2008-06-06 22:50:28 +0200 | [diff] [blame] | 493 | |
Ivo van Doorn | 0262ab0 | 2008-08-29 21:04:26 +0200 | [diff] [blame] | 494 | if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) { |
Ivo van Doorn | 6db3786 | 2008-06-06 22:50:28 +0200 | [diff] [blame] | 495 | ERROR(queue->rt2x00dev, |
| 496 | "Arrived at non-free entry in the non-full queue %d.\n" |
| 497 | "Please file bug report to %s.\n", |
| 498 | queue->qid, DRV_PROJECT); |
| 499 | return -EINVAL; |
| 500 | } |
| 501 | |
| 502 | /* |
| 503 | * Copy all TX descriptor information into txdesc, |
| 504 | * after that we are free to use the skb->cb array |
| 505 | * for our information. |
| 506 | */ |
| 507 | entry->skb = skb; |
| 508 | rt2x00queue_create_tx_descriptor(entry, &txdesc); |
| 509 | |
Ivo van Doorn | d74f5ba | 2008-06-16 19:56:54 +0200 | [diff] [blame] | 510 | /* |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 511 | * All information is retrieved from the skb->cb array, |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 512 | * now we should claim ownership of the driver part of that |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 513 | * array, preserving the bitrate index and flags. |
Ivo van Doorn | d74f5ba | 2008-06-16 19:56:54 +0200 | [diff] [blame] | 514 | */ |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 515 | tx_info = IEEE80211_SKB_CB(skb); |
| 516 | rate_idx = tx_info->control.rates[0].idx; |
| 517 | rate_flags = tx_info->control.rates[0].flags; |
Ivo van Doorn | 0e3de99 | 2008-11-12 00:01:37 +0100 | [diff] [blame] | 518 | skbdesc = get_skb_frame_desc(skb); |
Ivo van Doorn | d74f5ba | 2008-06-16 19:56:54 +0200 | [diff] [blame] | 519 | memset(skbdesc, 0, sizeof(*skbdesc)); |
| 520 | skbdesc->entry = entry; |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 521 | skbdesc->tx_rate_idx = rate_idx; |
| 522 | skbdesc->tx_rate_flags = rate_flags; |
Ivo van Doorn | d74f5ba | 2008-06-16 19:56:54 +0200 | [diff] [blame] | 523 | |
Johannes Berg | 7351c6b | 2009-11-19 01:08:30 +0100 | [diff] [blame] | 524 | if (local) |
| 525 | skbdesc->flags |= SKBDESC_NOT_MAC80211; |
| 526 | |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 527 | /* |
| 528 | * When hardware encryption is supported, and this frame |
| 529 | * is to be encrypted, we should strip the IV/EIV data from |
Daniel Mack | 3ad2f3f | 2010-02-03 08:01:28 +0800 | [diff] [blame] | 530 | * the frame so we can provide it to the driver separately. |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 531 | */ |
| 532 | if (test_bit(ENTRY_TXD_ENCRYPT, &txdesc.flags) && |
Ivo van Doorn | dddfb47 | 2008-12-02 18:20:42 +0100 | [diff] [blame] | 533 | !test_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc.flags)) { |
Ivo van Doorn | 3f787bd | 2008-12-20 10:56:36 +0100 | [diff] [blame] | 534 | if (test_bit(DRIVER_REQUIRE_COPY_IV, &queue->rt2x00dev->flags)) |
Ivo van Doorn | 9eb4e21 | 2009-04-26 16:08:30 +0200 | [diff] [blame] | 535 | rt2x00crypto_tx_copy_iv(skb, &txdesc); |
Ivo van Doorn | dddfb47 | 2008-12-02 18:20:42 +0100 | [diff] [blame] | 536 | else |
Ivo van Doorn | 9eb4e21 | 2009-04-26 16:08:30 +0200 | [diff] [blame] | 537 | rt2x00crypto_tx_remove_iv(skb, &txdesc); |
Ivo van Doorn | dddfb47 | 2008-12-02 18:20:42 +0100 | [diff] [blame] | 538 | } |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 539 | |
Ivo van Doorn | 93354cb | 2009-08-08 23:53:47 +0200 | [diff] [blame] | 540 | /* |
| 541 | * When DMA allocation is required we should guarentee to the |
| 542 | * driver that the DMA is aligned to a 4-byte boundary. |
Ivo van Doorn | 93354cb | 2009-08-08 23:53:47 +0200 | [diff] [blame] | 543 | * However some drivers require L2 padding to pad the payload |
| 544 | * rather then the header. This could be a requirement for |
| 545 | * PCI and USB devices, while header alignment only is valid |
| 546 | * for PCI devices. |
| 547 | */ |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 548 | if (test_bit(DRIVER_REQUIRE_L2PAD, &queue->rt2x00dev->flags)) |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 549 | rt2x00queue_insert_l2pad(entry->skb, txdesc.header_length); |
Ivo van Doorn | 93354cb | 2009-08-08 23:53:47 +0200 | [diff] [blame] | 550 | else if (test_bit(DRIVER_REQUIRE_DMA, &queue->rt2x00dev->flags)) |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 551 | rt2x00queue_align_frame(entry->skb); |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 552 | |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 553 | /* |
| 554 | * It could be possible that the queue was corrupted and this |
Ivo van Doorn | 0e3de99 | 2008-11-12 00:01:37 +0100 | [diff] [blame] | 555 | * call failed. Since we always return NETDEV_TX_OK to mac80211, |
| 556 | * this frame will simply be dropped. |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 557 | */ |
Gertjan van Wingerde | 78eea11 | 2010-06-29 21:41:05 +0200 | [diff] [blame] | 558 | if (unlikely(rt2x00queue_write_tx_data(entry, &txdesc))) { |
Ivo van Doorn | 0262ab0 | 2008-08-29 21:04:26 +0200 | [diff] [blame] | 559 | clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 560 | entry->skb = NULL; |
Ivo van Doorn | 0e3de99 | 2008-11-12 00:01:37 +0100 | [diff] [blame] | 561 | return -EIO; |
Ivo van Doorn | 6db3786 | 2008-06-06 22:50:28 +0200 | [diff] [blame] | 562 | } |
| 563 | |
Ivo van Doorn | 0262ab0 | 2008-08-29 21:04:26 +0200 | [diff] [blame] | 564 | set_bit(ENTRY_DATA_PENDING, &entry->flags); |
Ivo van Doorn | 6db3786 | 2008-06-06 22:50:28 +0200 | [diff] [blame] | 565 | |
| 566 | rt2x00queue_index_inc(queue, Q_INDEX); |
| 567 | rt2x00queue_write_tx_descriptor(entry, &txdesc); |
Gertjan van Wingerde | 6295d81 | 2010-05-09 21:24:22 +0200 | [diff] [blame] | 568 | rt2x00queue_kick_tx_queue(entry, &txdesc); |
Ivo van Doorn | 6db3786 | 2008-06-06 22:50:28 +0200 | [diff] [blame] | 569 | |
| 570 | return 0; |
| 571 | } |
| 572 | |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 573 | int rt2x00queue_update_beacon(struct rt2x00_dev *rt2x00dev, |
Ivo van Doorn | a2c9b65 | 2009-01-28 00:32:33 +0100 | [diff] [blame] | 574 | struct ieee80211_vif *vif, |
| 575 | const bool enable_beacon) |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 576 | { |
| 577 | struct rt2x00_intf *intf = vif_to_intf(vif); |
| 578 | struct skb_frame_desc *skbdesc; |
| 579 | struct txentry_desc txdesc; |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 580 | |
| 581 | if (unlikely(!intf->beacon)) |
| 582 | return -ENOBUFS; |
| 583 | |
Igor Perminov | 17512dc | 2009-08-08 23:55:18 +0200 | [diff] [blame] | 584 | mutex_lock(&intf->beacon_skb_mutex); |
| 585 | |
| 586 | /* |
| 587 | * Clean up the beacon skb. |
| 588 | */ |
| 589 | rt2x00queue_free_skb(rt2x00dev, intf->beacon->skb); |
| 590 | intf->beacon->skb = NULL; |
| 591 | |
Ivo van Doorn | a2c9b65 | 2009-01-28 00:32:33 +0100 | [diff] [blame] | 592 | if (!enable_beacon) { |
Ivo van Doorn | 9333145 | 2010-08-23 19:53:39 +0200 | [diff] [blame] | 593 | rt2x00dev->ops->lib->kill_tx_queue(intf->beacon->queue); |
Igor Perminov | 17512dc | 2009-08-08 23:55:18 +0200 | [diff] [blame] | 594 | mutex_unlock(&intf->beacon_skb_mutex); |
Ivo van Doorn | a2c9b65 | 2009-01-28 00:32:33 +0100 | [diff] [blame] | 595 | return 0; |
| 596 | } |
| 597 | |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 598 | intf->beacon->skb = ieee80211_beacon_get(rt2x00dev->hw, vif); |
Igor Perminov | 17512dc | 2009-08-08 23:55:18 +0200 | [diff] [blame] | 599 | if (!intf->beacon->skb) { |
| 600 | mutex_unlock(&intf->beacon_skb_mutex); |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 601 | return -ENOMEM; |
Igor Perminov | 17512dc | 2009-08-08 23:55:18 +0200 | [diff] [blame] | 602 | } |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 603 | |
| 604 | /* |
| 605 | * Copy all TX descriptor information into txdesc, |
| 606 | * after that we are free to use the skb->cb array |
| 607 | * for our information. |
| 608 | */ |
| 609 | rt2x00queue_create_tx_descriptor(intf->beacon, &txdesc); |
| 610 | |
| 611 | /* |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 612 | * Fill in skb descriptor |
| 613 | */ |
| 614 | skbdesc = get_skb_frame_desc(intf->beacon->skb); |
| 615 | memset(skbdesc, 0, sizeof(*skbdesc)); |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 616 | skbdesc->entry = intf->beacon; |
| 617 | |
| 618 | /* |
Gertjan van Wingerde | d61cb26 | 2010-05-08 23:40:24 +0200 | [diff] [blame] | 619 | * Send beacon to hardware and enable beacon genaration.. |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 620 | */ |
Gertjan van Wingerde | f224f4e | 2010-05-08 23:40:25 +0200 | [diff] [blame] | 621 | rt2x00dev->ops->lib->write_beacon(intf->beacon, &txdesc); |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 622 | |
Igor Perminov | 17512dc | 2009-08-08 23:55:18 +0200 | [diff] [blame] | 623 | mutex_unlock(&intf->beacon_skb_mutex); |
| 624 | |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 625 | return 0; |
| 626 | } |
| 627 | |
Ivo van Doorn | 5eb7efe | 2010-08-23 19:54:21 +0200 | [diff] [blame] | 628 | void rt2x00queue_for_each_entry(struct data_queue *queue, |
| 629 | enum queue_index start, |
| 630 | enum queue_index end, |
| 631 | void (*fn)(struct queue_entry *entry)) |
| 632 | { |
| 633 | unsigned long irqflags; |
| 634 | unsigned int index_start; |
| 635 | unsigned int index_end; |
| 636 | unsigned int i; |
| 637 | |
| 638 | if (unlikely(start >= Q_INDEX_MAX || end >= Q_INDEX_MAX)) { |
| 639 | ERROR(queue->rt2x00dev, |
| 640 | "Entry requested from invalid index range (%d - %d)\n", |
| 641 | start, end); |
| 642 | return; |
| 643 | } |
| 644 | |
| 645 | /* |
| 646 | * Only protect the range we are going to loop over, |
| 647 | * if during our loop a extra entry is set to pending |
| 648 | * it should not be kicked during this run, since it |
| 649 | * is part of another TX operation. |
| 650 | */ |
| 651 | spin_lock_irqsave(&queue->lock, irqflags); |
| 652 | index_start = queue->index[start]; |
| 653 | index_end = queue->index[end]; |
| 654 | spin_unlock_irqrestore(&queue->lock, irqflags); |
| 655 | |
| 656 | /* |
| 657 | * Start from the TX done pointer, this guarentees that we will |
| 658 | * send out all frames in the correct order. |
| 659 | */ |
| 660 | if (index_start < index_end) { |
| 661 | for (i = index_start; i < index_end; i++) |
| 662 | fn(&queue->entries[i]); |
| 663 | } else { |
| 664 | for (i = index_start; i < queue->limit; i++) |
| 665 | fn(&queue->entries[i]); |
| 666 | |
| 667 | for (i = 0; i < index_end; i++) |
| 668 | fn(&queue->entries[i]); |
| 669 | } |
| 670 | } |
| 671 | EXPORT_SYMBOL_GPL(rt2x00queue_for_each_entry); |
| 672 | |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 673 | struct data_queue *rt2x00queue_get_queue(struct rt2x00_dev *rt2x00dev, |
Ivo van Doorn | e58c6ac | 2008-04-21 19:00:47 +0200 | [diff] [blame] | 674 | const enum data_queue_qid queue) |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 675 | { |
| 676 | int atim = test_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags); |
| 677 | |
Ivo van Doorn | a2c9b65 | 2009-01-28 00:32:33 +0100 | [diff] [blame] | 678 | if (queue == QID_RX) |
| 679 | return rt2x00dev->rx; |
| 680 | |
Gertjan van Wingerde | 61448f8 | 2008-05-10 13:43:33 +0200 | [diff] [blame] | 681 | if (queue < rt2x00dev->ops->tx_queues && rt2x00dev->tx) |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 682 | return &rt2x00dev->tx[queue]; |
| 683 | |
| 684 | if (!rt2x00dev->bcn) |
| 685 | return NULL; |
| 686 | |
Ivo van Doorn | e58c6ac | 2008-04-21 19:00:47 +0200 | [diff] [blame] | 687 | if (queue == QID_BEACON) |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 688 | return &rt2x00dev->bcn[0]; |
Ivo van Doorn | e58c6ac | 2008-04-21 19:00:47 +0200 | [diff] [blame] | 689 | else if (queue == QID_ATIM && atim) |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 690 | return &rt2x00dev->bcn[1]; |
| 691 | |
| 692 | return NULL; |
| 693 | } |
| 694 | EXPORT_SYMBOL_GPL(rt2x00queue_get_queue); |
| 695 | |
| 696 | struct queue_entry *rt2x00queue_get_entry(struct data_queue *queue, |
| 697 | enum queue_index index) |
| 698 | { |
| 699 | struct queue_entry *entry; |
Ivo van Doorn | 5f46c4d | 2008-03-09 22:44:30 +0100 | [diff] [blame] | 700 | unsigned long irqflags; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 701 | |
| 702 | if (unlikely(index >= Q_INDEX_MAX)) { |
| 703 | ERROR(queue->rt2x00dev, |
| 704 | "Entry requested from invalid index type (%d)\n", index); |
| 705 | return NULL; |
| 706 | } |
| 707 | |
Ivo van Doorn | 5f46c4d | 2008-03-09 22:44:30 +0100 | [diff] [blame] | 708 | spin_lock_irqsave(&queue->lock, irqflags); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 709 | |
| 710 | entry = &queue->entries[queue->index[index]]; |
| 711 | |
Ivo van Doorn | 5f46c4d | 2008-03-09 22:44:30 +0100 | [diff] [blame] | 712 | spin_unlock_irqrestore(&queue->lock, irqflags); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 713 | |
| 714 | return entry; |
| 715 | } |
| 716 | EXPORT_SYMBOL_GPL(rt2x00queue_get_entry); |
| 717 | |
| 718 | void rt2x00queue_index_inc(struct data_queue *queue, enum queue_index index) |
| 719 | { |
Ivo van Doorn | 5f46c4d | 2008-03-09 22:44:30 +0100 | [diff] [blame] | 720 | unsigned long irqflags; |
| 721 | |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 722 | if (unlikely(index >= Q_INDEX_MAX)) { |
| 723 | ERROR(queue->rt2x00dev, |
| 724 | "Index change on invalid index type (%d)\n", index); |
| 725 | return; |
| 726 | } |
| 727 | |
Ivo van Doorn | 5f46c4d | 2008-03-09 22:44:30 +0100 | [diff] [blame] | 728 | spin_lock_irqsave(&queue->lock, irqflags); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 729 | |
| 730 | queue->index[index]++; |
| 731 | if (queue->index[index] >= queue->limit) |
| 732 | queue->index[index] = 0; |
| 733 | |
Ivo van Doorn | 10b6b80 | 2008-02-03 15:55:21 +0100 | [diff] [blame] | 734 | if (index == Q_INDEX) { |
| 735 | queue->length++; |
Ivo van Doorn | c965c74 | 2010-07-11 12:25:46 +0200 | [diff] [blame] | 736 | queue->last_index = jiffies; |
Ivo van Doorn | 10b6b80 | 2008-02-03 15:55:21 +0100 | [diff] [blame] | 737 | } else if (index == Q_INDEX_DONE) { |
| 738 | queue->length--; |
John Daiker | 5588751 | 2008-10-17 12:16:17 -0700 | [diff] [blame] | 739 | queue->count++; |
Ivo van Doorn | c965c74 | 2010-07-11 12:25:46 +0200 | [diff] [blame] | 740 | queue->last_index_done = jiffies; |
Ivo van Doorn | 10b6b80 | 2008-02-03 15:55:21 +0100 | [diff] [blame] | 741 | } |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 742 | |
Ivo van Doorn | 5f46c4d | 2008-03-09 22:44:30 +0100 | [diff] [blame] | 743 | spin_unlock_irqrestore(&queue->lock, irqflags); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 744 | } |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 745 | |
| 746 | static void rt2x00queue_reset(struct data_queue *queue) |
| 747 | { |
Ivo van Doorn | 5f46c4d | 2008-03-09 22:44:30 +0100 | [diff] [blame] | 748 | unsigned long irqflags; |
| 749 | |
| 750 | spin_lock_irqsave(&queue->lock, irqflags); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 751 | |
| 752 | queue->count = 0; |
| 753 | queue->length = 0; |
Ivo van Doorn | c965c74 | 2010-07-11 12:25:46 +0200 | [diff] [blame] | 754 | queue->last_index = jiffies; |
| 755 | queue->last_index_done = jiffies; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 756 | memset(queue->index, 0, sizeof(queue->index)); |
| 757 | |
Ivo van Doorn | 5f46c4d | 2008-03-09 22:44:30 +0100 | [diff] [blame] | 758 | spin_unlock_irqrestore(&queue->lock, irqflags); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 759 | } |
| 760 | |
Ivo van Doorn | a2c9b65 | 2009-01-28 00:32:33 +0100 | [diff] [blame] | 761 | void rt2x00queue_stop_queues(struct rt2x00_dev *rt2x00dev) |
| 762 | { |
| 763 | struct data_queue *queue; |
| 764 | |
| 765 | txall_queue_for_each(rt2x00dev, queue) |
Ivo van Doorn | 9333145 | 2010-08-23 19:53:39 +0200 | [diff] [blame] | 766 | rt2x00dev->ops->lib->kill_tx_queue(queue); |
Ivo van Doorn | a2c9b65 | 2009-01-28 00:32:33 +0100 | [diff] [blame] | 767 | } |
| 768 | |
Ivo van Doorn | 798b7ad | 2008-11-08 15:25:33 +0100 | [diff] [blame] | 769 | void rt2x00queue_init_queues(struct rt2x00_dev *rt2x00dev) |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 770 | { |
| 771 | struct data_queue *queue; |
| 772 | unsigned int i; |
| 773 | |
Ivo van Doorn | 798b7ad | 2008-11-08 15:25:33 +0100 | [diff] [blame] | 774 | queue_for_each(rt2x00dev, queue) { |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 775 | rt2x00queue_reset(queue); |
| 776 | |
Ivo van Doorn | 9c0ab71 | 2008-07-21 19:06:02 +0200 | [diff] [blame] | 777 | for (i = 0; i < queue->limit; i++) { |
Ivo van Doorn | 798b7ad | 2008-11-08 15:25:33 +0100 | [diff] [blame] | 778 | rt2x00dev->ops->lib->clear_entry(&queue->entries[i]); |
Ivo van Doorn | 7e613e1 | 2010-08-06 20:45:38 +0200 | [diff] [blame] | 779 | if (queue->qid == QID_RX) |
| 780 | rt2x00queue_index_inc(queue, Q_INDEX); |
Ivo van Doorn | 9c0ab71 | 2008-07-21 19:06:02 +0200 | [diff] [blame] | 781 | } |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 782 | } |
| 783 | } |
| 784 | |
| 785 | static int rt2x00queue_alloc_entries(struct data_queue *queue, |
| 786 | const struct data_queue_desc *qdesc) |
| 787 | { |
| 788 | struct queue_entry *entries; |
| 789 | unsigned int entry_size; |
| 790 | unsigned int i; |
| 791 | |
| 792 | rt2x00queue_reset(queue); |
| 793 | |
| 794 | queue->limit = qdesc->entry_num; |
Ivo van Doorn | b869767 | 2008-06-06 22:53:14 +0200 | [diff] [blame] | 795 | queue->threshold = DIV_ROUND_UP(qdesc->entry_num, 10); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 796 | queue->data_size = qdesc->data_size; |
| 797 | queue->desc_size = qdesc->desc_size; |
| 798 | |
| 799 | /* |
| 800 | * Allocate all queue entries. |
| 801 | */ |
| 802 | entry_size = sizeof(*entries) + qdesc->priv_size; |
| 803 | entries = kzalloc(queue->limit * entry_size, GFP_KERNEL); |
| 804 | if (!entries) |
| 805 | return -ENOMEM; |
| 806 | |
| 807 | #define QUEUE_ENTRY_PRIV_OFFSET(__base, __index, __limit, __esize, __psize) \ |
Adam Baker | 231be4e | 2008-02-10 22:48:19 +0100 | [diff] [blame] | 808 | ( ((char *)(__base)) + ((__limit) * (__esize)) + \ |
| 809 | ((__index) * (__psize)) ) |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 810 | |
| 811 | for (i = 0; i < queue->limit; i++) { |
| 812 | entries[i].flags = 0; |
| 813 | entries[i].queue = queue; |
| 814 | entries[i].skb = NULL; |
| 815 | entries[i].entry_idx = i; |
| 816 | entries[i].priv_data = |
| 817 | QUEUE_ENTRY_PRIV_OFFSET(entries, i, queue->limit, |
| 818 | sizeof(*entries), qdesc->priv_size); |
| 819 | } |
| 820 | |
| 821 | #undef QUEUE_ENTRY_PRIV_OFFSET |
| 822 | |
| 823 | queue->entries = entries; |
| 824 | |
| 825 | return 0; |
| 826 | } |
| 827 | |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 828 | static void rt2x00queue_free_skbs(struct rt2x00_dev *rt2x00dev, |
| 829 | struct data_queue *queue) |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 830 | { |
| 831 | unsigned int i; |
| 832 | |
| 833 | if (!queue->entries) |
| 834 | return; |
| 835 | |
| 836 | for (i = 0; i < queue->limit; i++) { |
| 837 | if (queue->entries[i].skb) |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 838 | rt2x00queue_free_skb(rt2x00dev, queue->entries[i].skb); |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 839 | } |
| 840 | } |
| 841 | |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 842 | static int rt2x00queue_alloc_rxskbs(struct rt2x00_dev *rt2x00dev, |
| 843 | struct data_queue *queue) |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 844 | { |
| 845 | unsigned int i; |
| 846 | struct sk_buff *skb; |
| 847 | |
| 848 | for (i = 0; i < queue->limit; i++) { |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 849 | skb = rt2x00queue_alloc_rxskb(rt2x00dev, &queue->entries[i]); |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 850 | if (!skb) |
Ivo van Doorn | 61243d8 | 2008-06-20 22:10:53 +0200 | [diff] [blame] | 851 | return -ENOMEM; |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 852 | queue->entries[i].skb = skb; |
| 853 | } |
| 854 | |
| 855 | return 0; |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 856 | } |
| 857 | |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 858 | int rt2x00queue_initialize(struct rt2x00_dev *rt2x00dev) |
| 859 | { |
| 860 | struct data_queue *queue; |
| 861 | int status; |
| 862 | |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 863 | status = rt2x00queue_alloc_entries(rt2x00dev->rx, rt2x00dev->ops->rx); |
| 864 | if (status) |
| 865 | goto exit; |
| 866 | |
| 867 | tx_queue_for_each(rt2x00dev, queue) { |
| 868 | status = rt2x00queue_alloc_entries(queue, rt2x00dev->ops->tx); |
| 869 | if (status) |
| 870 | goto exit; |
| 871 | } |
| 872 | |
| 873 | status = rt2x00queue_alloc_entries(rt2x00dev->bcn, rt2x00dev->ops->bcn); |
| 874 | if (status) |
| 875 | goto exit; |
| 876 | |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 877 | if (test_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags)) { |
| 878 | status = rt2x00queue_alloc_entries(&rt2x00dev->bcn[1], |
| 879 | rt2x00dev->ops->atim); |
| 880 | if (status) |
| 881 | goto exit; |
| 882 | } |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 883 | |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 884 | status = rt2x00queue_alloc_rxskbs(rt2x00dev, rt2x00dev->rx); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 885 | if (status) |
| 886 | goto exit; |
| 887 | |
| 888 | return 0; |
| 889 | |
| 890 | exit: |
| 891 | ERROR(rt2x00dev, "Queue entries allocation failed.\n"); |
| 892 | |
| 893 | rt2x00queue_uninitialize(rt2x00dev); |
| 894 | |
| 895 | return status; |
| 896 | } |
| 897 | |
| 898 | void rt2x00queue_uninitialize(struct rt2x00_dev *rt2x00dev) |
| 899 | { |
| 900 | struct data_queue *queue; |
| 901 | |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 902 | rt2x00queue_free_skbs(rt2x00dev, rt2x00dev->rx); |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 903 | |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 904 | queue_for_each(rt2x00dev, queue) { |
| 905 | kfree(queue->entries); |
| 906 | queue->entries = NULL; |
| 907 | } |
| 908 | } |
| 909 | |
Ivo van Doorn | 8f53927 | 2008-02-10 22:51:41 +0100 | [diff] [blame] | 910 | static void rt2x00queue_init(struct rt2x00_dev *rt2x00dev, |
| 911 | struct data_queue *queue, enum data_queue_qid qid) |
| 912 | { |
| 913 | spin_lock_init(&queue->lock); |
| 914 | |
| 915 | queue->rt2x00dev = rt2x00dev; |
| 916 | queue->qid = qid; |
Ivo van Doorn | 2af0a57 | 2008-08-29 21:05:45 +0200 | [diff] [blame] | 917 | queue->txop = 0; |
Ivo van Doorn | 8f53927 | 2008-02-10 22:51:41 +0100 | [diff] [blame] | 918 | queue->aifs = 2; |
| 919 | queue->cw_min = 5; |
| 920 | queue->cw_max = 10; |
| 921 | } |
| 922 | |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 923 | int rt2x00queue_allocate(struct rt2x00_dev *rt2x00dev) |
| 924 | { |
| 925 | struct data_queue *queue; |
| 926 | enum data_queue_qid qid; |
| 927 | unsigned int req_atim = |
| 928 | !!test_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags); |
| 929 | |
| 930 | /* |
| 931 | * We need the following queues: |
| 932 | * RX: 1 |
Gertjan van Wingerde | 61448f8 | 2008-05-10 13:43:33 +0200 | [diff] [blame] | 933 | * TX: ops->tx_queues |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 934 | * Beacon: 1 |
| 935 | * Atim: 1 (if required) |
| 936 | */ |
Gertjan van Wingerde | 61448f8 | 2008-05-10 13:43:33 +0200 | [diff] [blame] | 937 | rt2x00dev->data_queues = 2 + rt2x00dev->ops->tx_queues + req_atim; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 938 | |
| 939 | queue = kzalloc(rt2x00dev->data_queues * sizeof(*queue), GFP_KERNEL); |
| 940 | if (!queue) { |
| 941 | ERROR(rt2x00dev, "Queue allocation failed.\n"); |
| 942 | return -ENOMEM; |
| 943 | } |
| 944 | |
| 945 | /* |
| 946 | * Initialize pointers |
| 947 | */ |
| 948 | rt2x00dev->rx = queue; |
| 949 | rt2x00dev->tx = &queue[1]; |
Gertjan van Wingerde | 61448f8 | 2008-05-10 13:43:33 +0200 | [diff] [blame] | 950 | rt2x00dev->bcn = &queue[1 + rt2x00dev->ops->tx_queues]; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 951 | |
| 952 | /* |
| 953 | * Initialize queue parameters. |
| 954 | * RX: qid = QID_RX |
| 955 | * TX: qid = QID_AC_BE + index |
| 956 | * TX: cw_min: 2^5 = 32. |
| 957 | * TX: cw_max: 2^10 = 1024. |
Ivo van Doorn | 565a019 | 2008-06-03 20:29:05 +0200 | [diff] [blame] | 958 | * BCN: qid = QID_BEACON |
| 959 | * ATIM: qid = QID_ATIM |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 960 | */ |
Ivo van Doorn | 8f53927 | 2008-02-10 22:51:41 +0100 | [diff] [blame] | 961 | rt2x00queue_init(rt2x00dev, rt2x00dev->rx, QID_RX); |
| 962 | |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 963 | qid = QID_AC_BE; |
Ivo van Doorn | 8f53927 | 2008-02-10 22:51:41 +0100 | [diff] [blame] | 964 | tx_queue_for_each(rt2x00dev, queue) |
| 965 | rt2x00queue_init(rt2x00dev, queue, qid++); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 966 | |
Ivo van Doorn | 565a019 | 2008-06-03 20:29:05 +0200 | [diff] [blame] | 967 | rt2x00queue_init(rt2x00dev, &rt2x00dev->bcn[0], QID_BEACON); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 968 | if (req_atim) |
Ivo van Doorn | 565a019 | 2008-06-03 20:29:05 +0200 | [diff] [blame] | 969 | rt2x00queue_init(rt2x00dev, &rt2x00dev->bcn[1], QID_ATIM); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 970 | |
| 971 | return 0; |
| 972 | } |
| 973 | |
| 974 | void rt2x00queue_free(struct rt2x00_dev *rt2x00dev) |
| 975 | { |
| 976 | kfree(rt2x00dev->rx); |
| 977 | rt2x00dev->rx = NULL; |
| 978 | rt2x00dev->tx = NULL; |
| 979 | rt2x00dev->bcn = NULL; |
| 980 | } |