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 | |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 36 | struct sk_buff *rt2x00queue_alloc_rxskb(struct queue_entry *entry) |
Gertjan van Wingerde | 239c249 | 2008-06-06 22:54:12 +0200 | [diff] [blame] | 37 | { |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 38 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
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 | 7dab73b | 2011-04-18 15:27:06 +0200 | [diff] [blame] | 63 | if (test_bit(CAPABILITY_HW_CRYPTO, &rt2x00dev->cap_flags)) { |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 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 | |
Ivo van Doorn | 7dab73b | 2011-04-18 15:27:06 +0200 | [diff] [blame] | 89 | if (test_bit(REQUIRE_DMA, &rt2x00dev->cap_flags)) { |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 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 | |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 100 | void rt2x00queue_map_txskb(struct queue_entry *entry) |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 101 | { |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 102 | struct device *dev = entry->queue->rt2x00dev->dev; |
| 103 | struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 104 | |
Ivo van Doorn | 3ee54a0 | 2008-08-29 21:04:50 +0200 | [diff] [blame] | 105 | skbdesc->skb_dma = |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 106 | dma_map_single(dev, entry->skb->data, entry->skb->len, DMA_TO_DEVICE); |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 107 | skbdesc->flags |= SKBDESC_DMA_MAPPED_TX; |
| 108 | } |
| 109 | EXPORT_SYMBOL_GPL(rt2x00queue_map_txskb); |
| 110 | |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 111 | void rt2x00queue_unmap_skb(struct queue_entry *entry) |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 112 | { |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 113 | struct device *dev = entry->queue->rt2x00dev->dev; |
| 114 | struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 115 | |
| 116 | if (skbdesc->flags & SKBDESC_DMA_MAPPED_RX) { |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 117 | dma_unmap_single(dev, skbdesc->skb_dma, entry->skb->len, |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 118 | DMA_FROM_DEVICE); |
| 119 | skbdesc->flags &= ~SKBDESC_DMA_MAPPED_RX; |
Helmut Schaa | 546adf2 | 2010-10-09 13:33:43 +0200 | [diff] [blame] | 120 | } else if (skbdesc->flags & SKBDESC_DMA_MAPPED_TX) { |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 121 | dma_unmap_single(dev, skbdesc->skb_dma, entry->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 | |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 128 | void rt2x00queue_free_skb(struct queue_entry *entry) |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 129 | { |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 130 | if (!entry->skb) |
Ivo van Doorn | 9a61319 | 2008-07-05 15:11:57 +0200 | [diff] [blame] | 131 | return; |
| 132 | |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 133 | rt2x00queue_unmap_skb(entry); |
| 134 | dev_kfree_skb_any(entry->skb); |
| 135 | entry->skb = NULL; |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 136 | } |
Gertjan van Wingerde | 239c249 | 2008-06-06 22:54:12 +0200 | [diff] [blame] | 137 | |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 138 | void rt2x00queue_align_frame(struct sk_buff *skb) |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 139 | { |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 140 | unsigned int frame_length = skb->len; |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 141 | unsigned int align = ALIGN_SIZE(skb, 0); |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 142 | |
| 143 | if (!align) |
| 144 | return; |
| 145 | |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 146 | skb_push(skb, align); |
| 147 | memmove(skb->data, skb->data + align, frame_length); |
| 148 | skb_trim(skb, frame_length); |
| 149 | } |
| 150 | |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 151 | void rt2x00queue_insert_l2pad(struct sk_buff *skb, unsigned int header_length) |
| 152 | { |
Gertjan van Wingerde | 2e33146 | 2009-12-04 23:47:03 +0100 | [diff] [blame] | 153 | unsigned int payload_length = skb->len - header_length; |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 154 | unsigned int header_align = ALIGN_SIZE(skb, 0); |
| 155 | unsigned int payload_align = ALIGN_SIZE(skb, header_length); |
Gertjan van Wingerde | e54be4e | 2009-12-04 23:47:07 +0100 | [diff] [blame] | 156 | unsigned int l2pad = payload_length ? L2PAD_SIZE(header_length) : 0; |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 157 | |
Gertjan van Wingerde | 2e33146 | 2009-12-04 23:47:03 +0100 | [diff] [blame] | 158 | /* |
| 159 | * Adjust the header alignment if the payload needs to be moved more |
| 160 | * than the header. |
| 161 | */ |
| 162 | if (payload_align > header_align) |
| 163 | header_align += 4; |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 164 | |
Gertjan van Wingerde | 2e33146 | 2009-12-04 23:47:03 +0100 | [diff] [blame] | 165 | /* There is nothing to do if no alignment is needed */ |
| 166 | if (!header_align) |
| 167 | return; |
| 168 | |
| 169 | /* Reserve the amount of space needed in front of the frame */ |
| 170 | skb_push(skb, header_align); |
| 171 | |
| 172 | /* |
| 173 | * Move the header. |
| 174 | */ |
| 175 | memmove(skb->data, skb->data + header_align, header_length); |
| 176 | |
| 177 | /* Move the payload, if present and if required */ |
| 178 | if (payload_length && payload_align) |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 179 | memmove(skb->data + header_length + l2pad, |
Gertjan van Wingerde | a5186e9 | 2009-11-24 23:11:32 +0100 | [diff] [blame] | 180 | skb->data + header_length + l2pad + payload_align, |
Gertjan van Wingerde | 2e33146 | 2009-12-04 23:47:03 +0100 | [diff] [blame] | 181 | payload_length); |
| 182 | |
| 183 | /* Trim the skb to the correct size */ |
| 184 | skb_trim(skb, header_length + l2pad + payload_length); |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 185 | } |
| 186 | |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 187 | void rt2x00queue_remove_l2pad(struct sk_buff *skb, unsigned int header_length) |
| 188 | { |
Gertjan van Wingerde | a061a93 | 2010-12-13 12:33:12 +0100 | [diff] [blame] | 189 | /* |
| 190 | * L2 padding is only present if the skb contains more than just the |
| 191 | * IEEE 802.11 header. |
| 192 | */ |
| 193 | unsigned int l2pad = (skb->len > header_length) ? |
| 194 | L2PAD_SIZE(header_length) : 0; |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 195 | |
Gertjan van Wingerde | 354e39d | 2009-12-04 23:47:02 +0100 | [diff] [blame] | 196 | if (!l2pad) |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 197 | return; |
| 198 | |
Gertjan van Wingerde | a061a93 | 2010-12-13 12:33:12 +0100 | [diff] [blame] | 199 | memmove(skb->data + l2pad, skb->data, header_length); |
| 200 | skb_pull(skb, l2pad); |
Ivo van Doorn | daee6c0 | 2009-08-29 20:30:45 +0200 | [diff] [blame] | 201 | } |
| 202 | |
Gertjan van Wingerde | 77b5621 | 2011-07-06 22:57:00 +0200 | [diff] [blame] | 203 | static void rt2x00queue_create_tx_descriptor_seq(struct rt2x00_dev *rt2x00dev, |
| 204 | struct sk_buff *skb, |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 205 | struct txentry_desc *txdesc) |
| 206 | { |
Gertjan van Wingerde | 77b5621 | 2011-07-06 22:57:00 +0200 | [diff] [blame] | 207 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
| 208 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 209 | struct rt2x00_intf *intf = vif_to_intf(tx_info->control.vif); |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 210 | |
Helmut Schaa | c262e08 | 2011-03-03 19:39:56 +0100 | [diff] [blame] | 211 | if (!(tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)) |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 212 | return; |
| 213 | |
Helmut Schaa | 7fe7ee7 | 2011-03-03 19:42:01 +0100 | [diff] [blame] | 214 | __set_bit(ENTRY_TXD_GENERATE_SEQ, &txdesc->flags); |
| 215 | |
Gertjan van Wingerde | 77b5621 | 2011-07-06 22:57:00 +0200 | [diff] [blame] | 216 | if (!test_bit(REQUIRE_SW_SEQNO, &rt2x00dev->cap_flags)) |
Helmut Schaa | 7fe7ee7 | 2011-03-03 19:42:01 +0100 | [diff] [blame] | 217 | return; |
| 218 | |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 219 | /* |
Helmut Schaa | 7fe7ee7 | 2011-03-03 19:42:01 +0100 | [diff] [blame] | 220 | * The hardware is not able to insert a sequence number. Assign a |
| 221 | * software generated one here. |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 222 | * |
| 223 | * This is wrong because beacons are not getting sequence |
| 224 | * numbers assigned properly. |
| 225 | * |
| 226 | * A secondary problem exists for drivers that cannot toggle |
| 227 | * sequence counting per-frame, since those will override the |
| 228 | * sequence counter given by mac80211. |
| 229 | */ |
Gertjan van Wingerde | 798eefd | 2011-05-18 20:25:42 +0200 | [diff] [blame] | 230 | spin_lock(&intf->seqlock); |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 231 | |
| 232 | if (test_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc->flags)) |
| 233 | intf->seqno += 0x10; |
| 234 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); |
| 235 | hdr->seq_ctrl |= cpu_to_le16(intf->seqno); |
| 236 | |
Gertjan van Wingerde | 798eefd | 2011-05-18 20:25:42 +0200 | [diff] [blame] | 237 | spin_unlock(&intf->seqlock); |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 238 | |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 239 | } |
| 240 | |
Gertjan van Wingerde | 77b5621 | 2011-07-06 22:57:00 +0200 | [diff] [blame] | 241 | static void rt2x00queue_create_tx_descriptor_plcp(struct rt2x00_dev *rt2x00dev, |
| 242 | struct sk_buff *skb, |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 243 | struct txentry_desc *txdesc, |
| 244 | const struct rt2x00_rate *hwrate) |
| 245 | { |
Gertjan van Wingerde | 77b5621 | 2011-07-06 22:57:00 +0200 | [diff] [blame] | 246 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 247 | struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0]; |
| 248 | unsigned int data_length; |
| 249 | unsigned int duration; |
| 250 | unsigned int residual; |
| 251 | |
Helmut Schaa | 2517794 | 2011-03-03 19:43:25 +0100 | [diff] [blame] | 252 | /* |
| 253 | * Determine with what IFS priority this frame should be send. |
| 254 | * Set ifs to IFS_SIFS when the this is not the first fragment, |
| 255 | * or this fragment came after RTS/CTS. |
| 256 | */ |
| 257 | if (test_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc->flags)) |
| 258 | txdesc->u.plcp.ifs = IFS_BACKOFF; |
| 259 | else |
| 260 | txdesc->u.plcp.ifs = IFS_SIFS; |
| 261 | |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 262 | /* Data length + CRC + Crypto overhead (IV/EIV/ICV/MIC) */ |
Gertjan van Wingerde | 77b5621 | 2011-07-06 22:57:00 +0200 | [diff] [blame] | 263 | data_length = skb->len + 4; |
| 264 | data_length += rt2x00crypto_tx_overhead(rt2x00dev, skb); |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 265 | |
| 266 | /* |
| 267 | * PLCP setup |
| 268 | * Length calculation depends on OFDM/CCK rate. |
| 269 | */ |
Helmut Schaa | 26a1d07 | 2011-03-03 19:42:35 +0100 | [diff] [blame] | 270 | txdesc->u.plcp.signal = hwrate->plcp; |
| 271 | txdesc->u.plcp.service = 0x04; |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 272 | |
| 273 | if (hwrate->flags & DEV_RATE_OFDM) { |
Helmut Schaa | 26a1d07 | 2011-03-03 19:42:35 +0100 | [diff] [blame] | 274 | txdesc->u.plcp.length_high = (data_length >> 6) & 0x3f; |
| 275 | txdesc->u.plcp.length_low = data_length & 0x3f; |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 276 | } else { |
| 277 | /* |
| 278 | * Convert length to microseconds. |
| 279 | */ |
| 280 | residual = GET_DURATION_RES(data_length, hwrate->bitrate); |
| 281 | duration = GET_DURATION(data_length, hwrate->bitrate); |
| 282 | |
| 283 | if (residual != 0) { |
| 284 | duration++; |
| 285 | |
| 286 | /* |
| 287 | * Check if we need to set the Length Extension |
| 288 | */ |
| 289 | if (hwrate->bitrate == 110 && residual <= 30) |
Helmut Schaa | 26a1d07 | 2011-03-03 19:42:35 +0100 | [diff] [blame] | 290 | txdesc->u.plcp.service |= 0x80; |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 291 | } |
| 292 | |
Helmut Schaa | 26a1d07 | 2011-03-03 19:42:35 +0100 | [diff] [blame] | 293 | txdesc->u.plcp.length_high = (duration >> 8) & 0xff; |
| 294 | txdesc->u.plcp.length_low = duration & 0xff; |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 295 | |
| 296 | /* |
| 297 | * When preamble is enabled we should set the |
| 298 | * preamble bit for the signal. |
| 299 | */ |
| 300 | if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) |
Helmut Schaa | 26a1d07 | 2011-03-03 19:42:35 +0100 | [diff] [blame] | 301 | txdesc->u.plcp.signal |= 0x08; |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 302 | } |
| 303 | } |
| 304 | |
Gertjan van Wingerde | 77b5621 | 2011-07-06 22:57:00 +0200 | [diff] [blame] | 305 | static void rt2x00queue_create_tx_descriptor_ht(struct rt2x00_dev *rt2x00dev, |
| 306 | struct sk_buff *skb, |
Gertjan van Wingerde | 46a01ec | 2011-04-18 15:33:41 +0200 | [diff] [blame] | 307 | struct txentry_desc *txdesc, |
| 308 | const struct rt2x00_rate *hwrate) |
| 309 | { |
Gertjan van Wingerde | 77b5621 | 2011-07-06 22:57:00 +0200 | [diff] [blame] | 310 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Gertjan van Wingerde | 46a01ec | 2011-04-18 15:33:41 +0200 | [diff] [blame] | 311 | struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0]; |
Gertjan van Wingerde | 77b5621 | 2011-07-06 22:57:00 +0200 | [diff] [blame] | 312 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
Helmut Schaa | ead2bb6 | 2011-09-08 14:37:19 +0200 | [diff] [blame] | 313 | struct rt2x00_sta *sta_priv = NULL; |
Gertjan van Wingerde | 46a01ec | 2011-04-18 15:33:41 +0200 | [diff] [blame] | 314 | |
Helmut Schaa | ead2bb6 | 2011-09-08 14:37:19 +0200 | [diff] [blame] | 315 | if (tx_info->control.sta) { |
Gertjan van Wingerde | 46a01ec | 2011-04-18 15:33:41 +0200 | [diff] [blame] | 316 | txdesc->u.ht.mpdu_density = |
| 317 | tx_info->control.sta->ht_cap.ampdu_density; |
| 318 | |
Helmut Schaa | ead2bb6 | 2011-09-08 14:37:19 +0200 | [diff] [blame] | 319 | sta_priv = sta_to_rt2x00_sta(tx_info->control.sta); |
| 320 | txdesc->u.ht.wcid = sta_priv->wcid; |
| 321 | } |
| 322 | |
Gertjan van Wingerde | 46a01ec | 2011-04-18 15:33:41 +0200 | [diff] [blame] | 323 | txdesc->u.ht.ba_size = 7; /* FIXME: What value is needed? */ |
| 324 | |
| 325 | /* |
| 326 | * Only one STBC stream is supported for now. |
| 327 | */ |
| 328 | if (tx_info->flags & IEEE80211_TX_CTL_STBC) |
| 329 | txdesc->u.ht.stbc = 1; |
| 330 | |
| 331 | /* |
| 332 | * If IEEE80211_TX_RC_MCS is set txrate->idx just contains the |
| 333 | * mcs rate to be used |
| 334 | */ |
| 335 | if (txrate->flags & IEEE80211_TX_RC_MCS) { |
| 336 | txdesc->u.ht.mcs = txrate->idx; |
| 337 | |
| 338 | /* |
| 339 | * MIMO PS should be set to 1 for STA's using dynamic SM PS |
| 340 | * when using more then one tx stream (>MCS7). |
| 341 | */ |
| 342 | if (tx_info->control.sta && txdesc->u.ht.mcs > 7 && |
| 343 | ((tx_info->control.sta->ht_cap.cap & |
| 344 | IEEE80211_HT_CAP_SM_PS) >> |
| 345 | IEEE80211_HT_CAP_SM_PS_SHIFT) == |
| 346 | WLAN_HT_CAP_SM_PS_DYNAMIC) |
| 347 | __set_bit(ENTRY_TXD_HT_MIMO_PS, &txdesc->flags); |
| 348 | } else { |
| 349 | txdesc->u.ht.mcs = rt2x00_get_rate_mcs(hwrate->mcs); |
| 350 | if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) |
| 351 | txdesc->u.ht.mcs |= 0x08; |
| 352 | } |
| 353 | |
| 354 | /* |
| 355 | * This frame is eligible for an AMPDU, however, don't aggregate |
| 356 | * frames that are intended to probe a specific tx rate. |
| 357 | */ |
| 358 | if (tx_info->flags & IEEE80211_TX_CTL_AMPDU && |
| 359 | !(tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)) |
| 360 | __set_bit(ENTRY_TXD_HT_AMPDU, &txdesc->flags); |
| 361 | |
| 362 | /* |
| 363 | * Set 40Mhz mode if necessary (for legacy rates this will |
| 364 | * duplicate the frame to both channels). |
| 365 | */ |
| 366 | if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH || |
| 367 | txrate->flags & IEEE80211_TX_RC_DUP_DATA) |
| 368 | __set_bit(ENTRY_TXD_HT_BW_40, &txdesc->flags); |
| 369 | if (txrate->flags & IEEE80211_TX_RC_SHORT_GI) |
| 370 | __set_bit(ENTRY_TXD_HT_SHORT_GI, &txdesc->flags); |
| 371 | |
| 372 | /* |
| 373 | * Determine IFS values |
| 374 | * - Use TXOP_BACKOFF for management frames except beacons |
| 375 | * - Use TXOP_SIFS for fragment bursts |
| 376 | * - Use TXOP_HTTXOP for everything else |
| 377 | * |
| 378 | * Note: rt2800 devices won't use CTS protection (if used) |
| 379 | * for frames not transmitted with TXOP_HTTXOP |
| 380 | */ |
| 381 | if (ieee80211_is_mgmt(hdr->frame_control) && |
| 382 | !ieee80211_is_beacon(hdr->frame_control)) |
| 383 | txdesc->u.ht.txop = TXOP_BACKOFF; |
| 384 | else if (!(tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)) |
| 385 | txdesc->u.ht.txop = TXOP_SIFS; |
| 386 | else |
| 387 | txdesc->u.ht.txop = TXOP_HTTXOP; |
| 388 | } |
| 389 | |
Gertjan van Wingerde | 77b5621 | 2011-07-06 22:57:00 +0200 | [diff] [blame] | 390 | static void rt2x00queue_create_tx_descriptor(struct rt2x00_dev *rt2x00dev, |
| 391 | struct sk_buff *skb, |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 392 | struct txentry_desc *txdesc) |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 393 | { |
Gertjan van Wingerde | 77b5621 | 2011-07-06 22:57:00 +0200 | [diff] [blame] | 394 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
| 395 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
Helmut Schaa | 55b585e | 2011-03-03 19:43:49 +0100 | [diff] [blame] | 396 | struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0]; |
| 397 | struct ieee80211_rate *rate; |
| 398 | const struct rt2x00_rate *hwrate = NULL; |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 399 | |
| 400 | memset(txdesc, 0, sizeof(*txdesc)); |
| 401 | |
| 402 | /* |
Gertjan van Wingerde | df624ca | 2010-05-03 22:43:05 +0200 | [diff] [blame] | 403 | * Header and frame information. |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 404 | */ |
Gertjan van Wingerde | 77b5621 | 2011-07-06 22:57:00 +0200 | [diff] [blame] | 405 | txdesc->length = skb->len; |
| 406 | txdesc->header_length = ieee80211_get_hdrlen_from_skb(skb); |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 407 | |
| 408 | /* |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 409 | * Check whether this frame is to be acked. |
| 410 | */ |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 411 | if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 412 | __set_bit(ENTRY_TXD_ACK, &txdesc->flags); |
| 413 | |
| 414 | /* |
| 415 | * Check if this is a RTS/CTS frame |
| 416 | */ |
Ivo van Doorn | ac10446 | 2008-06-16 19:54:57 +0200 | [diff] [blame] | 417 | if (ieee80211_is_rts(hdr->frame_control) || |
| 418 | ieee80211_is_cts(hdr->frame_control)) { |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 419 | __set_bit(ENTRY_TXD_BURST, &txdesc->flags); |
Ivo van Doorn | ac10446 | 2008-06-16 19:54:57 +0200 | [diff] [blame] | 420 | if (ieee80211_is_rts(hdr->frame_control)) |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 421 | __set_bit(ENTRY_TXD_RTS_FRAME, &txdesc->flags); |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 422 | else |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 423 | __set_bit(ENTRY_TXD_CTS_FRAME, &txdesc->flags); |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 424 | if (tx_info->control.rts_cts_rate_idx >= 0) |
Johannes Berg | 2e92e6f | 2008-05-15 12:55:27 +0200 | [diff] [blame] | 425 | rate = |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 426 | ieee80211_get_rts_cts_rate(rt2x00dev->hw, tx_info); |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 427 | } |
| 428 | |
| 429 | /* |
| 430 | * Determine retry information. |
| 431 | */ |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 432 | txdesc->retry_limit = tx_info->control.rates[0].count - 1; |
Ivo van Doorn | 42c8285 | 2008-12-02 18:20:04 +0100 | [diff] [blame] | 433 | if (txdesc->retry_limit >= rt2x00dev->long_retry) |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 434 | __set_bit(ENTRY_TXD_RETRY_MODE, &txdesc->flags); |
| 435 | |
| 436 | /* |
| 437 | * Check if more fragments are pending |
| 438 | */ |
Helmut Schaa | 2606e42 | 2010-06-14 22:10:09 +0200 | [diff] [blame] | 439 | if (ieee80211_has_morefrags(hdr->frame_control)) { |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 440 | __set_bit(ENTRY_TXD_BURST, &txdesc->flags); |
| 441 | __set_bit(ENTRY_TXD_MORE_FRAG, &txdesc->flags); |
| 442 | } |
| 443 | |
| 444 | /* |
Helmut Schaa | 2606e42 | 2010-06-14 22:10:09 +0200 | [diff] [blame] | 445 | * Check if more frames (!= fragments) are pending |
| 446 | */ |
| 447 | if (tx_info->flags & IEEE80211_TX_CTL_MORE_FRAMES) |
| 448 | __set_bit(ENTRY_TXD_BURST, &txdesc->flags); |
| 449 | |
| 450 | /* |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 451 | * Beacons and probe responses require the tsf timestamp |
Helmut Schaa | 1bce85cf | 2011-02-20 13:56:07 +0100 | [diff] [blame] | 452 | * to be inserted into the frame. |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 453 | */ |
Helmut Schaa | 1bce85cf | 2011-02-20 13:56:07 +0100 | [diff] [blame] | 454 | if (ieee80211_is_beacon(hdr->frame_control) || |
| 455 | ieee80211_is_probe_resp(hdr->frame_control)) |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 456 | __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc->flags); |
| 457 | |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 458 | if ((tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) && |
Helmut Schaa | 2517794 | 2011-03-03 19:43:25 +0100 | [diff] [blame] | 459 | !test_bit(ENTRY_TXD_RTS_FRAME, &txdesc->flags)) |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 460 | __set_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc->flags); |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 461 | |
Ivo van Doorn | 076f958 | 2008-12-20 10:59:02 +0100 | [diff] [blame] | 462 | /* |
| 463 | * Determine rate modulation. |
| 464 | */ |
Helmut Schaa | 55b585e | 2011-03-03 19:43:49 +0100 | [diff] [blame] | 465 | if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD) |
| 466 | txdesc->rate_mode = RATE_MODE_HT_GREENFIELD; |
| 467 | else if (txrate->flags & IEEE80211_TX_RC_MCS) |
| 468 | txdesc->rate_mode = RATE_MODE_HT_MIX; |
| 469 | else { |
| 470 | rate = ieee80211_get_tx_rate(rt2x00dev->hw, tx_info); |
| 471 | hwrate = rt2x00_get_rate(rate->hw_value); |
| 472 | if (hwrate->flags & DEV_RATE_OFDM) |
| 473 | txdesc->rate_mode = RATE_MODE_OFDM; |
| 474 | else |
| 475 | txdesc->rate_mode = RATE_MODE_CCK; |
| 476 | } |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 477 | |
Ivo van Doorn | 7b40982 | 2008-12-20 10:58:33 +0100 | [diff] [blame] | 478 | /* |
| 479 | * Apply TX descriptor handling by components |
| 480 | */ |
Gertjan van Wingerde | 77b5621 | 2011-07-06 22:57:00 +0200 | [diff] [blame] | 481 | rt2x00crypto_create_tx_descriptor(rt2x00dev, skb, txdesc); |
| 482 | rt2x00queue_create_tx_descriptor_seq(rt2x00dev, skb, txdesc); |
Helmut Schaa | 26a1d07 | 2011-03-03 19:42:35 +0100 | [diff] [blame] | 483 | |
Ivo van Doorn | 7dab73b | 2011-04-18 15:27:06 +0200 | [diff] [blame] | 484 | if (test_bit(REQUIRE_HT_TX_DESC, &rt2x00dev->cap_flags)) |
Gertjan van Wingerde | 77b5621 | 2011-07-06 22:57:00 +0200 | [diff] [blame] | 485 | rt2x00queue_create_tx_descriptor_ht(rt2x00dev, skb, txdesc, |
| 486 | hwrate); |
Helmut Schaa | 26a1d07 | 2011-03-03 19:42:35 +0100 | [diff] [blame] | 487 | else |
Gertjan van Wingerde | 77b5621 | 2011-07-06 22:57:00 +0200 | [diff] [blame] | 488 | rt2x00queue_create_tx_descriptor_plcp(rt2x00dev, skb, txdesc, |
| 489 | hwrate); |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 490 | } |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 491 | |
Gertjan van Wingerde | 78eea11 | 2010-06-29 21:41:05 +0200 | [diff] [blame] | 492 | static int rt2x00queue_write_tx_data(struct queue_entry *entry, |
| 493 | struct txentry_desc *txdesc) |
| 494 | { |
| 495 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
| 496 | |
| 497 | /* |
| 498 | * This should not happen, we already checked the entry |
| 499 | * was ours. When the hardware disagrees there has been |
| 500 | * a queue corruption! |
| 501 | */ |
| 502 | if (unlikely(rt2x00dev->ops->lib->get_entry_state && |
| 503 | rt2x00dev->ops->lib->get_entry_state(entry))) { |
| 504 | ERROR(rt2x00dev, |
| 505 | "Corrupt queue %d, accessing entry which is not ours.\n" |
| 506 | "Please file bug report to %s.\n", |
| 507 | entry->queue->qid, DRV_PROJECT); |
| 508 | return -EINVAL; |
| 509 | } |
| 510 | |
| 511 | /* |
| 512 | * Add the requested extra tx headroom in front of the skb. |
| 513 | */ |
| 514 | skb_push(entry->skb, rt2x00dev->ops->extra_tx_headroom); |
| 515 | memset(entry->skb->data, 0, rt2x00dev->ops->extra_tx_headroom); |
| 516 | |
| 517 | /* |
Gertjan van Wingerde | 76dd5dd | 2010-06-29 21:42:23 +0200 | [diff] [blame] | 518 | * Call the driver's write_tx_data function, if it exists. |
Gertjan van Wingerde | 78eea11 | 2010-06-29 21:41:05 +0200 | [diff] [blame] | 519 | */ |
Gertjan van Wingerde | 76dd5dd | 2010-06-29 21:42:23 +0200 | [diff] [blame] | 520 | if (rt2x00dev->ops->lib->write_tx_data) |
| 521 | rt2x00dev->ops->lib->write_tx_data(entry, txdesc); |
Gertjan van Wingerde | 78eea11 | 2010-06-29 21:41:05 +0200 | [diff] [blame] | 522 | |
| 523 | /* |
| 524 | * Map the skb to DMA. |
| 525 | */ |
Ivo van Doorn | 7dab73b | 2011-04-18 15:27:06 +0200 | [diff] [blame] | 526 | if (test_bit(REQUIRE_DMA, &rt2x00dev->cap_flags)) |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 527 | rt2x00queue_map_txskb(entry); |
Gertjan van Wingerde | 78eea11 | 2010-06-29 21:41:05 +0200 | [diff] [blame] | 528 | |
| 529 | return 0; |
| 530 | } |
| 531 | |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 532 | static void rt2x00queue_write_tx_descriptor(struct queue_entry *entry, |
| 533 | struct txentry_desc *txdesc) |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 534 | { |
Ivo van Doorn | b869767 | 2008-06-06 22:53:14 +0200 | [diff] [blame] | 535 | struct data_queue *queue = entry->queue; |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 536 | |
Ivo van Doorn | 9333145 | 2010-08-23 19:53:39 +0200 | [diff] [blame] | 537 | queue->rt2x00dev->ops->lib->write_tx_desc(entry, txdesc); |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 538 | |
| 539 | /* |
| 540 | * All processing on the frame has been completed, this means |
| 541 | * it is now ready to be dumped to userspace through debugfs. |
| 542 | */ |
Ivo van Doorn | 9333145 | 2010-08-23 19:53:39 +0200 | [diff] [blame] | 543 | rt2x00debug_dump_frame(queue->rt2x00dev, DUMP_FRAME_TX, entry->skb); |
Gertjan van Wingerde | 6295d81 | 2010-05-09 21:24:22 +0200 | [diff] [blame] | 544 | } |
| 545 | |
Ivo van Doorn | 8be4eed | 2010-11-06 15:48:23 +0100 | [diff] [blame] | 546 | static void rt2x00queue_kick_tx_queue(struct data_queue *queue, |
Gertjan van Wingerde | 6295d81 | 2010-05-09 21:24:22 +0200 | [diff] [blame] | 547 | struct txentry_desc *txdesc) |
| 548 | { |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 549 | /* |
Ivo van Doorn | b869767 | 2008-06-06 22:53:14 +0200 | [diff] [blame] | 550 | * 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] | 551 | * 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] | 552 | * When the burst flag is set, this frame is always followed |
| 553 | * by another frame which in some way are related to eachother. |
| 554 | * This is true for fragments, RTS or CTS-to-self frames. |
Gertjan van Wingerde | 6295d81 | 2010-05-09 21:24:22 +0200 | [diff] [blame] | 555 | * 2) Rule 1 can be broken when the available entries |
Ivo van Doorn | b869767 | 2008-06-06 22:53:14 +0200 | [diff] [blame] | 556 | * in the queue are less then a certain threshold. |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 557 | */ |
Ivo van Doorn | b869767 | 2008-06-06 22:53:14 +0200 | [diff] [blame] | 558 | if (rt2x00queue_threshold(queue) || |
| 559 | !test_bit(ENTRY_TXD_BURST, &txdesc->flags)) |
Ivo van Doorn | dbba306 | 2010-12-13 12:34:54 +0100 | [diff] [blame] | 560 | queue->rt2x00dev->ops->lib->kick_queue(queue); |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 561 | } |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 562 | |
Johannes Berg | 7351c6b | 2009-11-19 01:08:30 +0100 | [diff] [blame] | 563 | int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb, |
| 564 | bool local) |
Ivo van Doorn | 6db3786 | 2008-06-06 22:50:28 +0200 | [diff] [blame] | 565 | { |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 566 | struct ieee80211_tx_info *tx_info; |
Gertjan van Wingerde | 77a861c | 2011-07-06 22:56:24 +0200 | [diff] [blame] | 567 | struct queue_entry *entry; |
Ivo van Doorn | 6db3786 | 2008-06-06 22:50:28 +0200 | [diff] [blame] | 568 | struct txentry_desc txdesc; |
Ivo van Doorn | d74f5ba | 2008-06-16 19:56:54 +0200 | [diff] [blame] | 569 | struct skb_frame_desc *skbdesc; |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 570 | u8 rate_idx, rate_flags; |
Gertjan van Wingerde | 77a861c | 2011-07-06 22:56:24 +0200 | [diff] [blame] | 571 | int ret = 0; |
| 572 | |
Ivo van Doorn | 6db3786 | 2008-06-06 22:50:28 +0200 | [diff] [blame] | 573 | /* |
| 574 | * Copy all TX descriptor information into txdesc, |
| 575 | * after that we are free to use the skb->cb array |
| 576 | * for our information. |
| 577 | */ |
Gertjan van Wingerde | 77b5621 | 2011-07-06 22:57:00 +0200 | [diff] [blame] | 578 | rt2x00queue_create_tx_descriptor(queue->rt2x00dev, skb, &txdesc); |
Ivo van Doorn | 6db3786 | 2008-06-06 22:50:28 +0200 | [diff] [blame] | 579 | |
Ivo van Doorn | d74f5ba | 2008-06-16 19:56:54 +0200 | [diff] [blame] | 580 | /* |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 581 | * All information is retrieved from the skb->cb array, |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 582 | * now we should claim ownership of the driver part of that |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 583 | * array, preserving the bitrate index and flags. |
Ivo van Doorn | d74f5ba | 2008-06-16 19:56:54 +0200 | [diff] [blame] | 584 | */ |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 585 | tx_info = IEEE80211_SKB_CB(skb); |
| 586 | rate_idx = tx_info->control.rates[0].idx; |
| 587 | rate_flags = tx_info->control.rates[0].flags; |
Ivo van Doorn | 0e3de99 | 2008-11-12 00:01:37 +0100 | [diff] [blame] | 588 | skbdesc = get_skb_frame_desc(skb); |
Ivo van Doorn | d74f5ba | 2008-06-16 19:56:54 +0200 | [diff] [blame] | 589 | memset(skbdesc, 0, sizeof(*skbdesc)); |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 590 | skbdesc->tx_rate_idx = rate_idx; |
| 591 | skbdesc->tx_rate_flags = rate_flags; |
Ivo van Doorn | d74f5ba | 2008-06-16 19:56:54 +0200 | [diff] [blame] | 592 | |
Johannes Berg | 7351c6b | 2009-11-19 01:08:30 +0100 | [diff] [blame] | 593 | if (local) |
| 594 | skbdesc->flags |= SKBDESC_NOT_MAC80211; |
| 595 | |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 596 | /* |
| 597 | * When hardware encryption is supported, and this frame |
| 598 | * is to be encrypted, we should strip the IV/EIV data from |
Daniel Mack | 3ad2f3f | 2010-02-03 08:01:28 +0800 | [diff] [blame] | 599 | * the frame so we can provide it to the driver separately. |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 600 | */ |
| 601 | if (test_bit(ENTRY_TXD_ENCRYPT, &txdesc.flags) && |
Ivo van Doorn | dddfb47 | 2008-12-02 18:20:42 +0100 | [diff] [blame] | 602 | !test_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc.flags)) { |
Ivo van Doorn | 7dab73b | 2011-04-18 15:27:06 +0200 | [diff] [blame] | 603 | if (test_bit(REQUIRE_COPY_IV, &queue->rt2x00dev->cap_flags)) |
Ivo van Doorn | 9eb4e21 | 2009-04-26 16:08:30 +0200 | [diff] [blame] | 604 | rt2x00crypto_tx_copy_iv(skb, &txdesc); |
Ivo van Doorn | dddfb47 | 2008-12-02 18:20:42 +0100 | [diff] [blame] | 605 | else |
Ivo van Doorn | 9eb4e21 | 2009-04-26 16:08:30 +0200 | [diff] [blame] | 606 | rt2x00crypto_tx_remove_iv(skb, &txdesc); |
Ivo van Doorn | dddfb47 | 2008-12-02 18:20:42 +0100 | [diff] [blame] | 607 | } |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 608 | |
Ivo van Doorn | 93354cb | 2009-08-08 23:53:47 +0200 | [diff] [blame] | 609 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 610 | * When DMA allocation is required we should guarantee to the |
Ivo van Doorn | 93354cb | 2009-08-08 23:53:47 +0200 | [diff] [blame] | 611 | * driver that the DMA is aligned to a 4-byte boundary. |
Ivo van Doorn | 93354cb | 2009-08-08 23:53:47 +0200 | [diff] [blame] | 612 | * However some drivers require L2 padding to pad the payload |
| 613 | * rather then the header. This could be a requirement for |
| 614 | * PCI and USB devices, while header alignment only is valid |
| 615 | * for PCI devices. |
| 616 | */ |
Ivo van Doorn | 7dab73b | 2011-04-18 15:27:06 +0200 | [diff] [blame] | 617 | if (test_bit(REQUIRE_L2PAD, &queue->rt2x00dev->cap_flags)) |
Gertjan van Wingerde | 128f8f7 | 2011-07-06 22:57:37 +0200 | [diff] [blame] | 618 | rt2x00queue_insert_l2pad(skb, txdesc.header_length); |
Ivo van Doorn | 7dab73b | 2011-04-18 15:27:06 +0200 | [diff] [blame] | 619 | else if (test_bit(REQUIRE_DMA, &queue->rt2x00dev->cap_flags)) |
Gertjan van Wingerde | 128f8f7 | 2011-07-06 22:57:37 +0200 | [diff] [blame] | 620 | rt2x00queue_align_frame(skb); |
| 621 | |
Stanislaw Gruszka | 3780d03 | 2012-03-09 12:39:54 +0100 | [diff] [blame^] | 622 | /* |
| 623 | * That function must be called with bh disabled. |
| 624 | */ |
Gertjan van Wingerde | 128f8f7 | 2011-07-06 22:57:37 +0200 | [diff] [blame] | 625 | spin_lock(&queue->tx_lock); |
| 626 | |
| 627 | if (unlikely(rt2x00queue_full(queue))) { |
| 628 | ERROR(queue->rt2x00dev, |
| 629 | "Dropping frame due to full tx queue %d.\n", queue->qid); |
| 630 | ret = -ENOBUFS; |
| 631 | goto out; |
| 632 | } |
| 633 | |
| 634 | entry = rt2x00queue_get_entry(queue, Q_INDEX); |
| 635 | |
| 636 | if (unlikely(test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, |
| 637 | &entry->flags))) { |
| 638 | ERROR(queue->rt2x00dev, |
| 639 | "Arrived at non-free entry in the non-full queue %d.\n" |
| 640 | "Please file bug report to %s.\n", |
| 641 | queue->qid, DRV_PROJECT); |
| 642 | ret = -EINVAL; |
| 643 | goto out; |
| 644 | } |
| 645 | |
| 646 | skbdesc->entry = entry; |
| 647 | entry->skb = skb; |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 648 | |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 649 | /* |
| 650 | * It could be possible that the queue was corrupted and this |
Ivo van Doorn | 0e3de99 | 2008-11-12 00:01:37 +0100 | [diff] [blame] | 651 | * call failed. Since we always return NETDEV_TX_OK to mac80211, |
| 652 | * this frame will simply be dropped. |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 653 | */ |
Gertjan van Wingerde | 78eea11 | 2010-06-29 21:41:05 +0200 | [diff] [blame] | 654 | if (unlikely(rt2x00queue_write_tx_data(entry, &txdesc))) { |
Ivo van Doorn | 0262ab0 | 2008-08-29 21:04:26 +0200 | [diff] [blame] | 655 | clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 656 | entry->skb = NULL; |
Gertjan van Wingerde | 77a861c | 2011-07-06 22:56:24 +0200 | [diff] [blame] | 657 | ret = -EIO; |
| 658 | goto out; |
Ivo van Doorn | 6db3786 | 2008-06-06 22:50:28 +0200 | [diff] [blame] | 659 | } |
| 660 | |
Ivo van Doorn | 0262ab0 | 2008-08-29 21:04:26 +0200 | [diff] [blame] | 661 | set_bit(ENTRY_DATA_PENDING, &entry->flags); |
Ivo van Doorn | 6db3786 | 2008-06-06 22:50:28 +0200 | [diff] [blame] | 662 | |
Johannes Stezenbach | 75256f0 | 2011-04-18 15:29:38 +0200 | [diff] [blame] | 663 | rt2x00queue_index_inc(entry, Q_INDEX); |
Ivo van Doorn | 6db3786 | 2008-06-06 22:50:28 +0200 | [diff] [blame] | 664 | rt2x00queue_write_tx_descriptor(entry, &txdesc); |
Ivo van Doorn | 8be4eed | 2010-11-06 15:48:23 +0100 | [diff] [blame] | 665 | rt2x00queue_kick_tx_queue(queue, &txdesc); |
Ivo van Doorn | 6db3786 | 2008-06-06 22:50:28 +0200 | [diff] [blame] | 666 | |
Gertjan van Wingerde | 77a861c | 2011-07-06 22:56:24 +0200 | [diff] [blame] | 667 | out: |
| 668 | spin_unlock(&queue->tx_lock); |
| 669 | return ret; |
Ivo van Doorn | 6db3786 | 2008-06-06 22:50:28 +0200 | [diff] [blame] | 670 | } |
| 671 | |
Helmut Schaa | 69cf36a | 2011-01-30 13:16:03 +0100 | [diff] [blame] | 672 | int rt2x00queue_clear_beacon(struct rt2x00_dev *rt2x00dev, |
| 673 | struct ieee80211_vif *vif) |
| 674 | { |
| 675 | struct rt2x00_intf *intf = vif_to_intf(vif); |
| 676 | |
| 677 | if (unlikely(!intf->beacon)) |
| 678 | return -ENOBUFS; |
| 679 | |
| 680 | mutex_lock(&intf->beacon_skb_mutex); |
| 681 | |
| 682 | /* |
| 683 | * Clean up the beacon skb. |
| 684 | */ |
| 685 | rt2x00queue_free_skb(intf->beacon); |
| 686 | |
| 687 | /* |
| 688 | * Clear beacon (single bssid devices don't need to clear the beacon |
| 689 | * since the beacon queue will get stopped anyway). |
| 690 | */ |
| 691 | if (rt2x00dev->ops->lib->clear_beacon) |
| 692 | rt2x00dev->ops->lib->clear_beacon(intf->beacon); |
| 693 | |
| 694 | mutex_unlock(&intf->beacon_skb_mutex); |
| 695 | |
| 696 | return 0; |
| 697 | } |
| 698 | |
Helmut Schaa | 8414ff0 | 2011-01-30 13:16:28 +0100 | [diff] [blame] | 699 | int rt2x00queue_update_beacon_locked(struct rt2x00_dev *rt2x00dev, |
| 700 | struct ieee80211_vif *vif) |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 701 | { |
| 702 | struct rt2x00_intf *intf = vif_to_intf(vif); |
| 703 | struct skb_frame_desc *skbdesc; |
| 704 | struct txentry_desc txdesc; |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 705 | |
| 706 | if (unlikely(!intf->beacon)) |
| 707 | return -ENOBUFS; |
| 708 | |
Igor Perminov | 17512dc | 2009-08-08 23:55:18 +0200 | [diff] [blame] | 709 | /* |
| 710 | * Clean up the beacon skb. |
| 711 | */ |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 712 | rt2x00queue_free_skb(intf->beacon); |
Igor Perminov | 17512dc | 2009-08-08 23:55:18 +0200 | [diff] [blame] | 713 | |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 714 | intf->beacon->skb = ieee80211_beacon_get(rt2x00dev->hw, vif); |
Helmut Schaa | 8414ff0 | 2011-01-30 13:16:28 +0100 | [diff] [blame] | 715 | if (!intf->beacon->skb) |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 716 | return -ENOMEM; |
| 717 | |
| 718 | /* |
| 719 | * Copy all TX descriptor information into txdesc, |
| 720 | * after that we are free to use the skb->cb array |
| 721 | * for our information. |
| 722 | */ |
Gertjan van Wingerde | 77b5621 | 2011-07-06 22:57:00 +0200 | [diff] [blame] | 723 | rt2x00queue_create_tx_descriptor(rt2x00dev, intf->beacon->skb, &txdesc); |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 724 | |
| 725 | /* |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 726 | * Fill in skb descriptor |
| 727 | */ |
| 728 | skbdesc = get_skb_frame_desc(intf->beacon->skb); |
| 729 | memset(skbdesc, 0, sizeof(*skbdesc)); |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 730 | skbdesc->entry = intf->beacon; |
| 731 | |
| 732 | /* |
Helmut Schaa | 69cf36a | 2011-01-30 13:16:03 +0100 | [diff] [blame] | 733 | * Send beacon to hardware. |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 734 | */ |
Gertjan van Wingerde | f224f4e | 2010-05-08 23:40:25 +0200 | [diff] [blame] | 735 | rt2x00dev->ops->lib->write_beacon(intf->beacon, &txdesc); |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 736 | |
Helmut Schaa | 8414ff0 | 2011-01-30 13:16:28 +0100 | [diff] [blame] | 737 | return 0; |
| 738 | |
| 739 | } |
| 740 | |
| 741 | int rt2x00queue_update_beacon(struct rt2x00_dev *rt2x00dev, |
| 742 | struct ieee80211_vif *vif) |
| 743 | { |
| 744 | struct rt2x00_intf *intf = vif_to_intf(vif); |
| 745 | int ret; |
| 746 | |
| 747 | mutex_lock(&intf->beacon_skb_mutex); |
| 748 | ret = rt2x00queue_update_beacon_locked(rt2x00dev, vif); |
Igor Perminov | 17512dc | 2009-08-08 23:55:18 +0200 | [diff] [blame] | 749 | mutex_unlock(&intf->beacon_skb_mutex); |
| 750 | |
Helmut Schaa | 8414ff0 | 2011-01-30 13:16:28 +0100 | [diff] [blame] | 751 | return ret; |
Ivo van Doorn | bd88a78 | 2008-07-09 15:12:44 +0200 | [diff] [blame] | 752 | } |
| 753 | |
Helmut Schaa | 10e1156 | 2011-04-18 15:27:43 +0200 | [diff] [blame] | 754 | bool rt2x00queue_for_each_entry(struct data_queue *queue, |
Ivo van Doorn | 5eb7efe | 2010-08-23 19:54:21 +0200 | [diff] [blame] | 755 | enum queue_index start, |
| 756 | enum queue_index end, |
Helmut Schaa | 10e1156 | 2011-04-18 15:27:43 +0200 | [diff] [blame] | 757 | void *data, |
| 758 | bool (*fn)(struct queue_entry *entry, |
| 759 | void *data)) |
Ivo van Doorn | 5eb7efe | 2010-08-23 19:54:21 +0200 | [diff] [blame] | 760 | { |
| 761 | unsigned long irqflags; |
| 762 | unsigned int index_start; |
| 763 | unsigned int index_end; |
| 764 | unsigned int i; |
| 765 | |
| 766 | if (unlikely(start >= Q_INDEX_MAX || end >= Q_INDEX_MAX)) { |
| 767 | ERROR(queue->rt2x00dev, |
| 768 | "Entry requested from invalid index range (%d - %d)\n", |
| 769 | start, end); |
Helmut Schaa | 10e1156 | 2011-04-18 15:27:43 +0200 | [diff] [blame] | 770 | return true; |
Ivo van Doorn | 5eb7efe | 2010-08-23 19:54:21 +0200 | [diff] [blame] | 771 | } |
| 772 | |
| 773 | /* |
| 774 | * Only protect the range we are going to loop over, |
| 775 | * if during our loop a extra entry is set to pending |
| 776 | * it should not be kicked during this run, since it |
| 777 | * is part of another TX operation. |
| 778 | */ |
Ivo van Doorn | 813f033 | 2010-11-06 15:48:05 +0100 | [diff] [blame] | 779 | spin_lock_irqsave(&queue->index_lock, irqflags); |
Ivo van Doorn | 5eb7efe | 2010-08-23 19:54:21 +0200 | [diff] [blame] | 780 | index_start = queue->index[start]; |
| 781 | index_end = queue->index[end]; |
Ivo van Doorn | 813f033 | 2010-11-06 15:48:05 +0100 | [diff] [blame] | 782 | spin_unlock_irqrestore(&queue->index_lock, irqflags); |
Ivo van Doorn | 5eb7efe | 2010-08-23 19:54:21 +0200 | [diff] [blame] | 783 | |
| 784 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 785 | * Start from the TX done pointer, this guarantees that we will |
Ivo van Doorn | 5eb7efe | 2010-08-23 19:54:21 +0200 | [diff] [blame] | 786 | * send out all frames in the correct order. |
| 787 | */ |
| 788 | if (index_start < index_end) { |
Helmut Schaa | 10e1156 | 2011-04-18 15:27:43 +0200 | [diff] [blame] | 789 | for (i = index_start; i < index_end; i++) { |
| 790 | if (fn(&queue->entries[i], data)) |
| 791 | return true; |
| 792 | } |
Ivo van Doorn | 5eb7efe | 2010-08-23 19:54:21 +0200 | [diff] [blame] | 793 | } else { |
Helmut Schaa | 10e1156 | 2011-04-18 15:27:43 +0200 | [diff] [blame] | 794 | for (i = index_start; i < queue->limit; i++) { |
| 795 | if (fn(&queue->entries[i], data)) |
| 796 | return true; |
| 797 | } |
Ivo van Doorn | 5eb7efe | 2010-08-23 19:54:21 +0200 | [diff] [blame] | 798 | |
Helmut Schaa | 10e1156 | 2011-04-18 15:27:43 +0200 | [diff] [blame] | 799 | for (i = 0; i < index_end; i++) { |
| 800 | if (fn(&queue->entries[i], data)) |
| 801 | return true; |
| 802 | } |
Ivo van Doorn | 5eb7efe | 2010-08-23 19:54:21 +0200 | [diff] [blame] | 803 | } |
Helmut Schaa | 10e1156 | 2011-04-18 15:27:43 +0200 | [diff] [blame] | 804 | |
| 805 | return false; |
Ivo van Doorn | 5eb7efe | 2010-08-23 19:54:21 +0200 | [diff] [blame] | 806 | } |
| 807 | EXPORT_SYMBOL_GPL(rt2x00queue_for_each_entry); |
| 808 | |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 809 | struct queue_entry *rt2x00queue_get_entry(struct data_queue *queue, |
| 810 | enum queue_index index) |
| 811 | { |
| 812 | struct queue_entry *entry; |
Ivo van Doorn | 5f46c4d | 2008-03-09 22:44:30 +0100 | [diff] [blame] | 813 | unsigned long irqflags; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 814 | |
| 815 | if (unlikely(index >= Q_INDEX_MAX)) { |
| 816 | ERROR(queue->rt2x00dev, |
| 817 | "Entry requested from invalid index type (%d)\n", index); |
| 818 | return NULL; |
| 819 | } |
| 820 | |
Ivo van Doorn | 813f033 | 2010-11-06 15:48:05 +0100 | [diff] [blame] | 821 | spin_lock_irqsave(&queue->index_lock, irqflags); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 822 | |
| 823 | entry = &queue->entries[queue->index[index]]; |
| 824 | |
Ivo van Doorn | 813f033 | 2010-11-06 15:48:05 +0100 | [diff] [blame] | 825 | spin_unlock_irqrestore(&queue->index_lock, irqflags); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 826 | |
| 827 | return entry; |
| 828 | } |
| 829 | EXPORT_SYMBOL_GPL(rt2x00queue_get_entry); |
| 830 | |
Johannes Stezenbach | 75256f0 | 2011-04-18 15:29:38 +0200 | [diff] [blame] | 831 | void rt2x00queue_index_inc(struct queue_entry *entry, enum queue_index index) |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 832 | { |
Johannes Stezenbach | 75256f0 | 2011-04-18 15:29:38 +0200 | [diff] [blame] | 833 | struct data_queue *queue = entry->queue; |
Ivo van Doorn | 5f46c4d | 2008-03-09 22:44:30 +0100 | [diff] [blame] | 834 | unsigned long irqflags; |
| 835 | |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 836 | if (unlikely(index >= Q_INDEX_MAX)) { |
| 837 | ERROR(queue->rt2x00dev, |
| 838 | "Index change on invalid index type (%d)\n", index); |
| 839 | return; |
| 840 | } |
| 841 | |
Ivo van Doorn | 813f033 | 2010-11-06 15:48:05 +0100 | [diff] [blame] | 842 | spin_lock_irqsave(&queue->index_lock, irqflags); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 843 | |
| 844 | queue->index[index]++; |
| 845 | if (queue->index[index] >= queue->limit) |
| 846 | queue->index[index] = 0; |
| 847 | |
Johannes Stezenbach | 75256f0 | 2011-04-18 15:29:38 +0200 | [diff] [blame] | 848 | entry->last_action = jiffies; |
Ivo van Doorn | 652a9dd | 2010-08-30 21:15:19 +0200 | [diff] [blame] | 849 | |
Ivo van Doorn | 10b6b80 | 2008-02-03 15:55:21 +0100 | [diff] [blame] | 850 | if (index == Q_INDEX) { |
| 851 | queue->length++; |
| 852 | } else if (index == Q_INDEX_DONE) { |
| 853 | queue->length--; |
John Daiker | 5588751 | 2008-10-17 12:16:17 -0700 | [diff] [blame] | 854 | queue->count++; |
Ivo van Doorn | 10b6b80 | 2008-02-03 15:55:21 +0100 | [diff] [blame] | 855 | } |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 856 | |
Ivo van Doorn | 813f033 | 2010-11-06 15:48:05 +0100 | [diff] [blame] | 857 | spin_unlock_irqrestore(&queue->index_lock, irqflags); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 858 | } |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 859 | |
Ivo van Doorn | 0b7fde5 | 2010-12-13 12:35:17 +0100 | [diff] [blame] | 860 | void rt2x00queue_pause_queue(struct data_queue *queue) |
| 861 | { |
| 862 | if (!test_bit(DEVICE_STATE_PRESENT, &queue->rt2x00dev->flags) || |
| 863 | !test_bit(QUEUE_STARTED, &queue->flags) || |
| 864 | test_and_set_bit(QUEUE_PAUSED, &queue->flags)) |
| 865 | return; |
| 866 | |
| 867 | switch (queue->qid) { |
Ivo van Doorn | f615e9a | 2010-12-13 12:36:38 +0100 | [diff] [blame] | 868 | case QID_AC_VO: |
| 869 | case QID_AC_VI: |
Ivo van Doorn | 0b7fde5 | 2010-12-13 12:35:17 +0100 | [diff] [blame] | 870 | case QID_AC_BE: |
| 871 | case QID_AC_BK: |
Ivo van Doorn | 0b7fde5 | 2010-12-13 12:35:17 +0100 | [diff] [blame] | 872 | /* |
| 873 | * For TX queues, we have to disable the queue |
| 874 | * inside mac80211. |
| 875 | */ |
| 876 | ieee80211_stop_queue(queue->rt2x00dev->hw, queue->qid); |
| 877 | break; |
| 878 | default: |
| 879 | break; |
| 880 | } |
| 881 | } |
| 882 | EXPORT_SYMBOL_GPL(rt2x00queue_pause_queue); |
| 883 | |
| 884 | void rt2x00queue_unpause_queue(struct data_queue *queue) |
| 885 | { |
| 886 | if (!test_bit(DEVICE_STATE_PRESENT, &queue->rt2x00dev->flags) || |
| 887 | !test_bit(QUEUE_STARTED, &queue->flags) || |
| 888 | !test_and_clear_bit(QUEUE_PAUSED, &queue->flags)) |
| 889 | return; |
| 890 | |
| 891 | switch (queue->qid) { |
Ivo van Doorn | f615e9a | 2010-12-13 12:36:38 +0100 | [diff] [blame] | 892 | case QID_AC_VO: |
| 893 | case QID_AC_VI: |
Ivo van Doorn | 0b7fde5 | 2010-12-13 12:35:17 +0100 | [diff] [blame] | 894 | case QID_AC_BE: |
| 895 | case QID_AC_BK: |
Ivo van Doorn | 0b7fde5 | 2010-12-13 12:35:17 +0100 | [diff] [blame] | 896 | /* |
| 897 | * For TX queues, we have to enable the queue |
| 898 | * inside mac80211. |
| 899 | */ |
| 900 | ieee80211_wake_queue(queue->rt2x00dev->hw, queue->qid); |
| 901 | break; |
Ivo van Doorn | 5be6560 | 2010-12-13 12:35:40 +0100 | [diff] [blame] | 902 | case QID_RX: |
| 903 | /* |
| 904 | * For RX we need to kick the queue now in order to |
| 905 | * receive frames. |
| 906 | */ |
| 907 | queue->rt2x00dev->ops->lib->kick_queue(queue); |
Ivo van Doorn | 0b7fde5 | 2010-12-13 12:35:17 +0100 | [diff] [blame] | 908 | default: |
| 909 | break; |
| 910 | } |
| 911 | } |
| 912 | EXPORT_SYMBOL_GPL(rt2x00queue_unpause_queue); |
| 913 | |
| 914 | void rt2x00queue_start_queue(struct data_queue *queue) |
| 915 | { |
| 916 | mutex_lock(&queue->status_lock); |
| 917 | |
| 918 | if (!test_bit(DEVICE_STATE_PRESENT, &queue->rt2x00dev->flags) || |
| 919 | test_and_set_bit(QUEUE_STARTED, &queue->flags)) { |
| 920 | mutex_unlock(&queue->status_lock); |
| 921 | return; |
| 922 | } |
| 923 | |
| 924 | set_bit(QUEUE_PAUSED, &queue->flags); |
| 925 | |
| 926 | queue->rt2x00dev->ops->lib->start_queue(queue); |
| 927 | |
| 928 | rt2x00queue_unpause_queue(queue); |
| 929 | |
| 930 | mutex_unlock(&queue->status_lock); |
| 931 | } |
| 932 | EXPORT_SYMBOL_GPL(rt2x00queue_start_queue); |
| 933 | |
| 934 | void rt2x00queue_stop_queue(struct data_queue *queue) |
| 935 | { |
| 936 | mutex_lock(&queue->status_lock); |
| 937 | |
| 938 | if (!test_and_clear_bit(QUEUE_STARTED, &queue->flags)) { |
| 939 | mutex_unlock(&queue->status_lock); |
| 940 | return; |
| 941 | } |
| 942 | |
| 943 | rt2x00queue_pause_queue(queue); |
| 944 | |
| 945 | queue->rt2x00dev->ops->lib->stop_queue(queue); |
| 946 | |
| 947 | mutex_unlock(&queue->status_lock); |
| 948 | } |
| 949 | EXPORT_SYMBOL_GPL(rt2x00queue_stop_queue); |
| 950 | |
Ivo van Doorn | 5be6560 | 2010-12-13 12:35:40 +0100 | [diff] [blame] | 951 | void rt2x00queue_flush_queue(struct data_queue *queue, bool drop) |
| 952 | { |
Ivo van Doorn | 5be6560 | 2010-12-13 12:35:40 +0100 | [diff] [blame] | 953 | bool started; |
| 954 | bool tx_queue = |
Ivo van Doorn | f615e9a | 2010-12-13 12:36:38 +0100 | [diff] [blame] | 955 | (queue->qid == QID_AC_VO) || |
Ivo van Doorn | 5be6560 | 2010-12-13 12:35:40 +0100 | [diff] [blame] | 956 | (queue->qid == QID_AC_VI) || |
Ivo van Doorn | f615e9a | 2010-12-13 12:36:38 +0100 | [diff] [blame] | 957 | (queue->qid == QID_AC_BE) || |
| 958 | (queue->qid == QID_AC_BK); |
Ivo van Doorn | 5be6560 | 2010-12-13 12:35:40 +0100 | [diff] [blame] | 959 | |
| 960 | mutex_lock(&queue->status_lock); |
| 961 | |
| 962 | /* |
| 963 | * If the queue has been started, we must stop it temporarily |
| 964 | * to prevent any new frames to be queued on the device. If |
| 965 | * we are not dropping the pending frames, the queue must |
| 966 | * only be stopped in the software and not the hardware, |
| 967 | * otherwise the queue will never become empty on its own. |
| 968 | */ |
| 969 | started = test_bit(QUEUE_STARTED, &queue->flags); |
| 970 | if (started) { |
| 971 | /* |
| 972 | * Pause the queue |
| 973 | */ |
| 974 | rt2x00queue_pause_queue(queue); |
| 975 | |
| 976 | /* |
| 977 | * If we are not supposed to drop any pending |
| 978 | * frames, this means we must force a start (=kick) |
| 979 | * to the queue to make sure the hardware will |
| 980 | * start transmitting. |
| 981 | */ |
| 982 | if (!drop && tx_queue) |
| 983 | queue->rt2x00dev->ops->lib->kick_queue(queue); |
| 984 | } |
| 985 | |
| 986 | /* |
Ivo van Doorn | 152a599 | 2011-04-18 15:31:02 +0200 | [diff] [blame] | 987 | * Check if driver supports flushing, if that is the case we can |
| 988 | * defer the flushing to the driver. Otherwise we must use the |
| 989 | * alternative which just waits for the queue to become empty. |
Ivo van Doorn | 5be6560 | 2010-12-13 12:35:40 +0100 | [diff] [blame] | 990 | */ |
Ivo van Doorn | 152a599 | 2011-04-18 15:31:02 +0200 | [diff] [blame] | 991 | if (likely(queue->rt2x00dev->ops->lib->flush_queue)) |
| 992 | queue->rt2x00dev->ops->lib->flush_queue(queue, drop); |
Ivo van Doorn | 5be6560 | 2010-12-13 12:35:40 +0100 | [diff] [blame] | 993 | |
| 994 | /* |
| 995 | * The queue flush has failed... |
| 996 | */ |
| 997 | if (unlikely(!rt2x00queue_empty(queue))) |
Johannes Stezenbach | 21957c3 | 2011-01-30 13:22:22 +0100 | [diff] [blame] | 998 | WARNING(queue->rt2x00dev, "Queue %d failed to flush\n", queue->qid); |
Ivo van Doorn | 5be6560 | 2010-12-13 12:35:40 +0100 | [diff] [blame] | 999 | |
| 1000 | /* |
| 1001 | * Restore the queue to the previous status |
| 1002 | */ |
| 1003 | if (started) |
| 1004 | rt2x00queue_unpause_queue(queue); |
| 1005 | |
| 1006 | mutex_unlock(&queue->status_lock); |
| 1007 | } |
| 1008 | EXPORT_SYMBOL_GPL(rt2x00queue_flush_queue); |
| 1009 | |
Ivo van Doorn | 0b7fde5 | 2010-12-13 12:35:17 +0100 | [diff] [blame] | 1010 | void rt2x00queue_start_queues(struct rt2x00_dev *rt2x00dev) |
| 1011 | { |
| 1012 | struct data_queue *queue; |
| 1013 | |
| 1014 | /* |
| 1015 | * rt2x00queue_start_queue will call ieee80211_wake_queue |
| 1016 | * for each queue after is has been properly initialized. |
| 1017 | */ |
| 1018 | tx_queue_for_each(rt2x00dev, queue) |
| 1019 | rt2x00queue_start_queue(queue); |
| 1020 | |
| 1021 | rt2x00queue_start_queue(rt2x00dev->rx); |
| 1022 | } |
| 1023 | EXPORT_SYMBOL_GPL(rt2x00queue_start_queues); |
| 1024 | |
| 1025 | void rt2x00queue_stop_queues(struct rt2x00_dev *rt2x00dev) |
| 1026 | { |
| 1027 | struct data_queue *queue; |
| 1028 | |
| 1029 | /* |
| 1030 | * rt2x00queue_stop_queue will call ieee80211_stop_queue |
| 1031 | * as well, but we are completely shutting doing everything |
| 1032 | * now, so it is much safer to stop all TX queues at once, |
| 1033 | * and use rt2x00queue_stop_queue for cleaning up. |
| 1034 | */ |
| 1035 | ieee80211_stop_queues(rt2x00dev->hw); |
| 1036 | |
| 1037 | tx_queue_for_each(rt2x00dev, queue) |
| 1038 | rt2x00queue_stop_queue(queue); |
| 1039 | |
| 1040 | rt2x00queue_stop_queue(rt2x00dev->rx); |
| 1041 | } |
| 1042 | EXPORT_SYMBOL_GPL(rt2x00queue_stop_queues); |
| 1043 | |
Ivo van Doorn | 5be6560 | 2010-12-13 12:35:40 +0100 | [diff] [blame] | 1044 | void rt2x00queue_flush_queues(struct rt2x00_dev *rt2x00dev, bool drop) |
| 1045 | { |
| 1046 | struct data_queue *queue; |
| 1047 | |
| 1048 | tx_queue_for_each(rt2x00dev, queue) |
| 1049 | rt2x00queue_flush_queue(queue, drop); |
| 1050 | |
| 1051 | rt2x00queue_flush_queue(rt2x00dev->rx, drop); |
| 1052 | } |
| 1053 | EXPORT_SYMBOL_GPL(rt2x00queue_flush_queues); |
| 1054 | |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1055 | static void rt2x00queue_reset(struct data_queue *queue) |
| 1056 | { |
Ivo van Doorn | 5f46c4d | 2008-03-09 22:44:30 +0100 | [diff] [blame] | 1057 | unsigned long irqflags; |
Ivo van Doorn | 652a9dd | 2010-08-30 21:15:19 +0200 | [diff] [blame] | 1058 | unsigned int i; |
Ivo van Doorn | 5f46c4d | 2008-03-09 22:44:30 +0100 | [diff] [blame] | 1059 | |
Ivo van Doorn | 813f033 | 2010-11-06 15:48:05 +0100 | [diff] [blame] | 1060 | spin_lock_irqsave(&queue->index_lock, irqflags); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1061 | |
| 1062 | queue->count = 0; |
| 1063 | queue->length = 0; |
Ivo van Doorn | 652a9dd | 2010-08-30 21:15:19 +0200 | [diff] [blame] | 1064 | |
Johannes Stezenbach | 75256f0 | 2011-04-18 15:29:38 +0200 | [diff] [blame] | 1065 | for (i = 0; i < Q_INDEX_MAX; i++) |
Ivo van Doorn | 652a9dd | 2010-08-30 21:15:19 +0200 | [diff] [blame] | 1066 | queue->index[i] = 0; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1067 | |
Ivo van Doorn | 813f033 | 2010-11-06 15:48:05 +0100 | [diff] [blame] | 1068 | spin_unlock_irqrestore(&queue->index_lock, irqflags); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1069 | } |
| 1070 | |
Ivo van Doorn | 798b7ad | 2008-11-08 15:25:33 +0100 | [diff] [blame] | 1071 | void rt2x00queue_init_queues(struct rt2x00_dev *rt2x00dev) |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1072 | { |
| 1073 | struct data_queue *queue; |
| 1074 | unsigned int i; |
| 1075 | |
Ivo van Doorn | 798b7ad | 2008-11-08 15:25:33 +0100 | [diff] [blame] | 1076 | queue_for_each(rt2x00dev, queue) { |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1077 | rt2x00queue_reset(queue); |
| 1078 | |
Ivo van Doorn | 64e7d72 | 2010-12-13 12:36:00 +0100 | [diff] [blame] | 1079 | for (i = 0; i < queue->limit; i++) |
Ivo van Doorn | 798b7ad | 2008-11-08 15:25:33 +0100 | [diff] [blame] | 1080 | rt2x00dev->ops->lib->clear_entry(&queue->entries[i]); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1081 | } |
| 1082 | } |
| 1083 | |
| 1084 | static int rt2x00queue_alloc_entries(struct data_queue *queue, |
| 1085 | const struct data_queue_desc *qdesc) |
| 1086 | { |
| 1087 | struct queue_entry *entries; |
| 1088 | unsigned int entry_size; |
| 1089 | unsigned int i; |
| 1090 | |
| 1091 | rt2x00queue_reset(queue); |
| 1092 | |
| 1093 | queue->limit = qdesc->entry_num; |
Ivo van Doorn | b869767 | 2008-06-06 22:53:14 +0200 | [diff] [blame] | 1094 | queue->threshold = DIV_ROUND_UP(qdesc->entry_num, 10); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1095 | queue->data_size = qdesc->data_size; |
| 1096 | queue->desc_size = qdesc->desc_size; |
| 1097 | |
| 1098 | /* |
| 1099 | * Allocate all queue entries. |
| 1100 | */ |
| 1101 | entry_size = sizeof(*entries) + qdesc->priv_size; |
Joe Perches | baeb2ff | 2010-08-11 07:02:48 +0000 | [diff] [blame] | 1102 | entries = kcalloc(queue->limit, entry_size, GFP_KERNEL); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1103 | if (!entries) |
| 1104 | return -ENOMEM; |
| 1105 | |
| 1106 | #define QUEUE_ENTRY_PRIV_OFFSET(__base, __index, __limit, __esize, __psize) \ |
Mark Einon | f8bfbc3 | 2010-11-06 15:47:25 +0100 | [diff] [blame] | 1107 | (((char *)(__base)) + ((__limit) * (__esize)) + \ |
| 1108 | ((__index) * (__psize))) |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1109 | |
| 1110 | for (i = 0; i < queue->limit; i++) { |
| 1111 | entries[i].flags = 0; |
| 1112 | entries[i].queue = queue; |
| 1113 | entries[i].skb = NULL; |
| 1114 | entries[i].entry_idx = i; |
| 1115 | entries[i].priv_data = |
| 1116 | QUEUE_ENTRY_PRIV_OFFSET(entries, i, queue->limit, |
| 1117 | sizeof(*entries), qdesc->priv_size); |
| 1118 | } |
| 1119 | |
| 1120 | #undef QUEUE_ENTRY_PRIV_OFFSET |
| 1121 | |
| 1122 | queue->entries = entries; |
| 1123 | |
| 1124 | return 0; |
| 1125 | } |
| 1126 | |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 1127 | static void rt2x00queue_free_skbs(struct data_queue *queue) |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 1128 | { |
| 1129 | unsigned int i; |
| 1130 | |
| 1131 | if (!queue->entries) |
| 1132 | return; |
| 1133 | |
| 1134 | for (i = 0; i < queue->limit; i++) { |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 1135 | rt2x00queue_free_skb(&queue->entries[i]); |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 1136 | } |
| 1137 | } |
| 1138 | |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 1139 | static int rt2x00queue_alloc_rxskbs(struct data_queue *queue) |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 1140 | { |
| 1141 | unsigned int i; |
| 1142 | struct sk_buff *skb; |
| 1143 | |
| 1144 | for (i = 0; i < queue->limit; i++) { |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 1145 | skb = rt2x00queue_alloc_rxskb(&queue->entries[i]); |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 1146 | if (!skb) |
Ivo van Doorn | 61243d8 | 2008-06-20 22:10:53 +0200 | [diff] [blame] | 1147 | return -ENOMEM; |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 1148 | queue->entries[i].skb = skb; |
| 1149 | } |
| 1150 | |
| 1151 | return 0; |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 1152 | } |
| 1153 | |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1154 | int rt2x00queue_initialize(struct rt2x00_dev *rt2x00dev) |
| 1155 | { |
| 1156 | struct data_queue *queue; |
| 1157 | int status; |
| 1158 | |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1159 | status = rt2x00queue_alloc_entries(rt2x00dev->rx, rt2x00dev->ops->rx); |
| 1160 | if (status) |
| 1161 | goto exit; |
| 1162 | |
| 1163 | tx_queue_for_each(rt2x00dev, queue) { |
| 1164 | status = rt2x00queue_alloc_entries(queue, rt2x00dev->ops->tx); |
| 1165 | if (status) |
| 1166 | goto exit; |
| 1167 | } |
| 1168 | |
| 1169 | status = rt2x00queue_alloc_entries(rt2x00dev->bcn, rt2x00dev->ops->bcn); |
| 1170 | if (status) |
| 1171 | goto exit; |
| 1172 | |
Ivo van Doorn | 7dab73b | 2011-04-18 15:27:06 +0200 | [diff] [blame] | 1173 | if (test_bit(REQUIRE_ATIM_QUEUE, &rt2x00dev->cap_flags)) { |
Gertjan van Wingerde | e74df4a | 2011-03-03 19:46:09 +0100 | [diff] [blame] | 1174 | status = rt2x00queue_alloc_entries(rt2x00dev->atim, |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 1175 | rt2x00dev->ops->atim); |
| 1176 | if (status) |
| 1177 | goto exit; |
| 1178 | } |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1179 | |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 1180 | status = rt2x00queue_alloc_rxskbs(rt2x00dev->rx); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1181 | if (status) |
| 1182 | goto exit; |
| 1183 | |
| 1184 | return 0; |
| 1185 | |
| 1186 | exit: |
| 1187 | ERROR(rt2x00dev, "Queue entries allocation failed.\n"); |
| 1188 | |
| 1189 | rt2x00queue_uninitialize(rt2x00dev); |
| 1190 | |
| 1191 | return status; |
| 1192 | } |
| 1193 | |
| 1194 | void rt2x00queue_uninitialize(struct rt2x00_dev *rt2x00dev) |
| 1195 | { |
| 1196 | struct data_queue *queue; |
| 1197 | |
Ivo van Doorn | fa69560 | 2010-10-11 15:37:25 +0200 | [diff] [blame] | 1198 | rt2x00queue_free_skbs(rt2x00dev->rx); |
Gertjan van Wingerde | 30caa6e | 2008-06-16 19:56:08 +0200 | [diff] [blame] | 1199 | |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1200 | queue_for_each(rt2x00dev, queue) { |
| 1201 | kfree(queue->entries); |
| 1202 | queue->entries = NULL; |
| 1203 | } |
| 1204 | } |
| 1205 | |
Ivo van Doorn | 8f53927 | 2008-02-10 22:51:41 +0100 | [diff] [blame] | 1206 | static void rt2x00queue_init(struct rt2x00_dev *rt2x00dev, |
| 1207 | struct data_queue *queue, enum data_queue_qid qid) |
| 1208 | { |
Ivo van Doorn | 0b7fde5 | 2010-12-13 12:35:17 +0100 | [diff] [blame] | 1209 | mutex_init(&queue->status_lock); |
Gertjan van Wingerde | 77a861c | 2011-07-06 22:56:24 +0200 | [diff] [blame] | 1210 | spin_lock_init(&queue->tx_lock); |
Ivo van Doorn | 813f033 | 2010-11-06 15:48:05 +0100 | [diff] [blame] | 1211 | spin_lock_init(&queue->index_lock); |
Ivo van Doorn | 8f53927 | 2008-02-10 22:51:41 +0100 | [diff] [blame] | 1212 | |
| 1213 | queue->rt2x00dev = rt2x00dev; |
| 1214 | queue->qid = qid; |
Ivo van Doorn | 2af0a57 | 2008-08-29 21:05:45 +0200 | [diff] [blame] | 1215 | queue->txop = 0; |
Ivo van Doorn | 8f53927 | 2008-02-10 22:51:41 +0100 | [diff] [blame] | 1216 | queue->aifs = 2; |
| 1217 | queue->cw_min = 5; |
| 1218 | queue->cw_max = 10; |
| 1219 | } |
| 1220 | |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1221 | int rt2x00queue_allocate(struct rt2x00_dev *rt2x00dev) |
| 1222 | { |
| 1223 | struct data_queue *queue; |
| 1224 | enum data_queue_qid qid; |
| 1225 | unsigned int req_atim = |
Ivo van Doorn | 7dab73b | 2011-04-18 15:27:06 +0200 | [diff] [blame] | 1226 | !!test_bit(REQUIRE_ATIM_QUEUE, &rt2x00dev->cap_flags); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1227 | |
| 1228 | /* |
| 1229 | * We need the following queues: |
| 1230 | * RX: 1 |
Gertjan van Wingerde | 61448f8 | 2008-05-10 13:43:33 +0200 | [diff] [blame] | 1231 | * TX: ops->tx_queues |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1232 | * Beacon: 1 |
| 1233 | * Atim: 1 (if required) |
| 1234 | */ |
Gertjan van Wingerde | 61448f8 | 2008-05-10 13:43:33 +0200 | [diff] [blame] | 1235 | rt2x00dev->data_queues = 2 + rt2x00dev->ops->tx_queues + req_atim; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1236 | |
Joe Perches | baeb2ff | 2010-08-11 07:02:48 +0000 | [diff] [blame] | 1237 | queue = kcalloc(rt2x00dev->data_queues, sizeof(*queue), GFP_KERNEL); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1238 | if (!queue) { |
| 1239 | ERROR(rt2x00dev, "Queue allocation failed.\n"); |
| 1240 | return -ENOMEM; |
| 1241 | } |
| 1242 | |
| 1243 | /* |
| 1244 | * Initialize pointers |
| 1245 | */ |
| 1246 | rt2x00dev->rx = queue; |
| 1247 | rt2x00dev->tx = &queue[1]; |
Gertjan van Wingerde | 61448f8 | 2008-05-10 13:43:33 +0200 | [diff] [blame] | 1248 | rt2x00dev->bcn = &queue[1 + rt2x00dev->ops->tx_queues]; |
Gertjan van Wingerde | e74df4a | 2011-03-03 19:46:09 +0100 | [diff] [blame] | 1249 | rt2x00dev->atim = req_atim ? &queue[2 + rt2x00dev->ops->tx_queues] : NULL; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1250 | |
| 1251 | /* |
| 1252 | * Initialize queue parameters. |
| 1253 | * RX: qid = QID_RX |
Ivo van Doorn | f615e9a | 2010-12-13 12:36:38 +0100 | [diff] [blame] | 1254 | * TX: qid = QID_AC_VO + index |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1255 | * TX: cw_min: 2^5 = 32. |
| 1256 | * TX: cw_max: 2^10 = 1024. |
Ivo van Doorn | 565a019 | 2008-06-03 20:29:05 +0200 | [diff] [blame] | 1257 | * BCN: qid = QID_BEACON |
| 1258 | * ATIM: qid = QID_ATIM |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1259 | */ |
Ivo van Doorn | 8f53927 | 2008-02-10 22:51:41 +0100 | [diff] [blame] | 1260 | rt2x00queue_init(rt2x00dev, rt2x00dev->rx, QID_RX); |
| 1261 | |
Ivo van Doorn | f615e9a | 2010-12-13 12:36:38 +0100 | [diff] [blame] | 1262 | qid = QID_AC_VO; |
Ivo van Doorn | 8f53927 | 2008-02-10 22:51:41 +0100 | [diff] [blame] | 1263 | tx_queue_for_each(rt2x00dev, queue) |
| 1264 | rt2x00queue_init(rt2x00dev, queue, qid++); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1265 | |
Gertjan van Wingerde | e74df4a | 2011-03-03 19:46:09 +0100 | [diff] [blame] | 1266 | rt2x00queue_init(rt2x00dev, rt2x00dev->bcn, QID_BEACON); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1267 | if (req_atim) |
Gertjan van Wingerde | e74df4a | 2011-03-03 19:46:09 +0100 | [diff] [blame] | 1268 | rt2x00queue_init(rt2x00dev, rt2x00dev->atim, QID_ATIM); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 1269 | |
| 1270 | return 0; |
| 1271 | } |
| 1272 | |
| 1273 | void rt2x00queue_free(struct rt2x00_dev *rt2x00dev) |
| 1274 | { |
| 1275 | kfree(rt2x00dev->rx); |
| 1276 | rt2x00dev->rx = NULL; |
| 1277 | rt2x00dev->tx = NULL; |
| 1278 | rt2x00dev->bcn = NULL; |
| 1279 | } |