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) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com> |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 3 | <http://rt2x00.serialmonkey.com> |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 2 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program; if not, write to the |
| 17 | Free Software Foundation, Inc., |
| 18 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | */ |
| 20 | |
| 21 | /* |
| 22 | Module: rt2x00 |
| 23 | Abstract: rt2x00 queue datastructures and routines |
| 24 | */ |
| 25 | |
| 26 | #ifndef RT2X00QUEUE_H |
| 27 | #define RT2X00QUEUE_H |
| 28 | |
| 29 | #include <linux/prefetch.h> |
| 30 | |
| 31 | /** |
Luis Correia | 4951348 | 2009-07-17 21:39:19 +0200 | [diff] [blame] | 32 | * DOC: Entry frame size |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 33 | * |
| 34 | * Ralink PCI devices demand the Frame size to be a multiple of 128 bytes, |
| 35 | * for USB devices this restriction does not apply, but the value of |
| 36 | * 2432 makes sense since it is big enough to contain the maximum fragment |
| 37 | * size according to the ieee802.11 specs. |
Ivo van Doorn | 35f00cf | 2009-04-26 16:09:32 +0200 | [diff] [blame] | 38 | * The aggregation size depends on support from the driver, but should |
| 39 | * be something around 3840 bytes. |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 40 | */ |
Ivo van Doorn | 35f00cf | 2009-04-26 16:09:32 +0200 | [diff] [blame] | 41 | #define DATA_FRAME_SIZE 2432 |
| 42 | #define MGMT_FRAME_SIZE 256 |
| 43 | #define AGGREGATION_SIZE 3840 |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 44 | |
| 45 | /** |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 46 | * enum data_queue_qid: Queue identification |
Ivo van Doorn | e58c6ac | 2008-04-21 19:00:47 +0200 | [diff] [blame] | 47 | * |
Ivo van Doorn | f615e9a | 2010-12-13 12:36:38 +0100 | [diff] [blame] | 48 | * @QID_AC_VO: AC VO queue |
| 49 | * @QID_AC_VI: AC VI queue |
Ivo van Doorn | e58c6ac | 2008-04-21 19:00:47 +0200 | [diff] [blame] | 50 | * @QID_AC_BE: AC BE queue |
| 51 | * @QID_AC_BK: AC BK queue |
Ivo van Doorn | e58c6ac | 2008-04-21 19:00:47 +0200 | [diff] [blame] | 52 | * @QID_HCCA: HCCA queue |
| 53 | * @QID_MGMT: MGMT queue (prio queue) |
| 54 | * @QID_RX: RX queue |
| 55 | * @QID_OTHER: None of the above (don't use, only present for completeness) |
| 56 | * @QID_BEACON: Beacon queue (value unspecified, don't send it to device) |
| 57 | * @QID_ATIM: Atim queue (value unspeficied, don't send it to device) |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 58 | */ |
| 59 | enum data_queue_qid { |
Ivo van Doorn | f615e9a | 2010-12-13 12:36:38 +0100 | [diff] [blame] | 60 | QID_AC_VO = 0, |
| 61 | QID_AC_VI = 1, |
| 62 | QID_AC_BE = 2, |
| 63 | QID_AC_BK = 3, |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 64 | QID_HCCA = 4, |
| 65 | QID_MGMT = 13, |
| 66 | QID_RX = 14, |
| 67 | QID_OTHER = 15, |
Ivo van Doorn | e58c6ac | 2008-04-21 19:00:47 +0200 | [diff] [blame] | 68 | QID_BEACON, |
| 69 | QID_ATIM, |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 70 | }; |
| 71 | |
| 72 | /** |
Ivo van Doorn | baf26a7 | 2008-02-17 17:32:08 +0100 | [diff] [blame] | 73 | * enum skb_frame_desc_flags: Flags for &struct skb_frame_desc |
| 74 | * |
Ivo van Doorn | d74f5ba | 2008-06-16 19:56:54 +0200 | [diff] [blame] | 75 | * @SKBDESC_DMA_MAPPED_RX: &skb_dma field has been mapped for RX |
| 76 | * @SKBDESC_DMA_MAPPED_TX: &skb_dma field has been mapped for TX |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 77 | * @SKBDESC_IV_STRIPPED: Frame contained a IV/EIV provided by |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 78 | * mac80211 but was stripped for processing by the driver. |
Johannes Berg | 7351c6b | 2009-11-19 01:08:30 +0100 | [diff] [blame] | 79 | * @SKBDESC_NOT_MAC80211: Frame didn't originate from mac80211, |
| 80 | * don't try to pass it back. |
Gertjan van Wingerde | fd76f14 | 2010-05-11 23:51:43 +0200 | [diff] [blame] | 81 | * @SKBDESC_DESC_IN_SKB: The descriptor is at the start of the |
| 82 | * skb, instead of in the desc field. |
Ivo van Doorn | baf26a7 | 2008-02-17 17:32:08 +0100 | [diff] [blame] | 83 | */ |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 84 | enum skb_frame_desc_flags { |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 85 | SKBDESC_DMA_MAPPED_RX = 1 << 0, |
| 86 | SKBDESC_DMA_MAPPED_TX = 1 << 1, |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 87 | SKBDESC_IV_STRIPPED = 1 << 2, |
Gertjan van Wingerde | 354e39d | 2009-12-04 23:47:02 +0100 | [diff] [blame] | 88 | SKBDESC_NOT_MAC80211 = 1 << 3, |
Gertjan van Wingerde | fd76f14 | 2010-05-11 23:51:43 +0200 | [diff] [blame] | 89 | SKBDESC_DESC_IN_SKB = 1 << 4, |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 90 | }; |
Ivo van Doorn | baf26a7 | 2008-02-17 17:32:08 +0100 | [diff] [blame] | 91 | |
| 92 | /** |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 93 | * struct skb_frame_desc: Descriptor information for the skb buffer |
| 94 | * |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 95 | * This structure is placed over the driver_data array, this means that |
| 96 | * this structure should not exceed the size of that array (40 bytes). |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 97 | * |
Ivo van Doorn | baf26a7 | 2008-02-17 17:32:08 +0100 | [diff] [blame] | 98 | * @flags: Frame flags, see &enum skb_frame_desc_flags. |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 99 | * @desc_len: Length of the frame descriptor. |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 100 | * @tx_rate_idx: the index of the TX rate, used for TX status reporting |
| 101 | * @tx_rate_flags: the TX rate flags, used for TX status reporting |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 102 | * @desc: Pointer to descriptor part of the frame. |
| 103 | * Note that this pointer could point to something outside |
| 104 | * of the scope of the skb->data pointer. |
Ivo van Doorn | 1ce9cda | 2008-12-02 18:19:48 +0100 | [diff] [blame] | 105 | * @iv: IV/EIV data used during encryption/decryption. |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 106 | * @skb_dma: (PCI-only) the DMA address associated with the sk buffer. |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 107 | * @entry: The entry to which this sk buffer belongs. |
| 108 | */ |
| 109 | struct skb_frame_desc { |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 110 | u8 flags; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 111 | |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 112 | u8 desc_len; |
| 113 | u8 tx_rate_idx; |
| 114 | u8 tx_rate_flags; |
| 115 | |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 116 | void *desc; |
| 117 | |
Ivo van Doorn | 1ce9cda | 2008-12-02 18:19:48 +0100 | [diff] [blame] | 118 | __le32 iv[2]; |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 119 | |
Gertjan van Wingerde | c4da004 | 2008-06-16 19:56:31 +0200 | [diff] [blame] | 120 | dma_addr_t skb_dma; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 121 | |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 122 | struct queue_entry *entry; |
| 123 | }; |
| 124 | |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 125 | /** |
| 126 | * get_skb_frame_desc - Obtain the rt2x00 frame descriptor from a sk_buff. |
| 127 | * @skb: &struct sk_buff from where we obtain the &struct skb_frame_desc |
| 128 | */ |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 129 | static inline struct skb_frame_desc* get_skb_frame_desc(struct sk_buff *skb) |
| 130 | { |
Johannes Berg | e039fa4 | 2008-05-15 12:55:29 +0200 | [diff] [blame] | 131 | BUILD_BUG_ON(sizeof(struct skb_frame_desc) > |
| 132 | IEEE80211_TX_INFO_DRIVER_DATA_SIZE); |
| 133 | return (struct skb_frame_desc *)&IEEE80211_SKB_CB(skb)->driver_data; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 134 | } |
| 135 | |
| 136 | /** |
Ivo van Doorn | 19d30e0 | 2008-03-15 21:38:07 +0100 | [diff] [blame] | 137 | * enum rxdone_entry_desc_flags: Flags for &struct rxdone_entry_desc |
| 138 | * |
Ivo van Doorn | 6c6aa3c | 2008-08-29 21:07:16 +0200 | [diff] [blame] | 139 | * @RXDONE_SIGNAL_PLCP: Signal field contains the plcp value. |
| 140 | * @RXDONE_SIGNAL_BITRATE: Signal field contains the bitrate value. |
Ivo van Doorn | 35f00cf | 2009-04-26 16:09:32 +0200 | [diff] [blame] | 141 | * @RXDONE_SIGNAL_MCS: Signal field contains the mcs value. |
Ivo van Doorn | 19d30e0 | 2008-03-15 21:38:07 +0100 | [diff] [blame] | 142 | * @RXDONE_MY_BSS: Does this frame originate from device's BSS. |
Ivo van Doorn | 74415ed | 2008-12-02 22:50:33 +0100 | [diff] [blame] | 143 | * @RXDONE_CRYPTO_IV: Driver provided IV/EIV data. |
| 144 | * @RXDONE_CRYPTO_ICV: Driver provided ICV data. |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 145 | * @RXDONE_L2PAD: 802.11 payload has been padded to 4-byte boundary. |
Ivo van Doorn | 19d30e0 | 2008-03-15 21:38:07 +0100 | [diff] [blame] | 146 | */ |
| 147 | enum rxdone_entry_desc_flags { |
Ivo van Doorn | 35f00cf | 2009-04-26 16:09:32 +0200 | [diff] [blame] | 148 | RXDONE_SIGNAL_PLCP = BIT(0), |
| 149 | RXDONE_SIGNAL_BITRATE = BIT(1), |
| 150 | RXDONE_SIGNAL_MCS = BIT(2), |
| 151 | RXDONE_MY_BSS = BIT(3), |
| 152 | RXDONE_CRYPTO_IV = BIT(4), |
| 153 | RXDONE_CRYPTO_ICV = BIT(5), |
| 154 | RXDONE_L2PAD = BIT(6), |
Ivo van Doorn | 19d30e0 | 2008-03-15 21:38:07 +0100 | [diff] [blame] | 155 | }; |
| 156 | |
| 157 | /** |
Ivo van Doorn | b30dd5c0 | 2008-12-20 10:59:55 +0100 | [diff] [blame] | 158 | * RXDONE_SIGNAL_MASK - Define to mask off all &rxdone_entry_desc_flags flags |
| 159 | * except for the RXDONE_SIGNAL_* flags. This is useful to convert the dev_flags |
| 160 | * from &rxdone_entry_desc to a signal value type. |
| 161 | */ |
| 162 | #define RXDONE_SIGNAL_MASK \ |
Ivo van Doorn | 35f00cf | 2009-04-26 16:09:32 +0200 | [diff] [blame] | 163 | ( RXDONE_SIGNAL_PLCP | RXDONE_SIGNAL_BITRATE | RXDONE_SIGNAL_MCS ) |
Ivo van Doorn | b30dd5c0 | 2008-12-20 10:59:55 +0100 | [diff] [blame] | 164 | |
| 165 | /** |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 166 | * struct rxdone_entry_desc: RX Entry descriptor |
| 167 | * |
| 168 | * Summary of information that has been read from the RX frame descriptor. |
| 169 | * |
Ivo van Doorn | ae73e58 | 2008-07-04 16:14:59 +0200 | [diff] [blame] | 170 | * @timestamp: RX Timestamp |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 171 | * @signal: Signal of the received frame. |
| 172 | * @rssi: RSSI of the received frame. |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 173 | * @size: Data size of the received frame. |
| 174 | * @flags: MAC80211 receive flags (See &enum mac80211_rx_flags). |
Ivo van Doorn | 19d30e0 | 2008-03-15 21:38:07 +0100 | [diff] [blame] | 175 | * @dev_flags: Ralink receive flags (See &enum rxdone_entry_desc_flags). |
Ivo van Doorn | 35f00cf | 2009-04-26 16:09:32 +0200 | [diff] [blame] | 176 | * @rate_mode: Rate mode (See @enum rate_modulation). |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 177 | * @cipher: Cipher type used during decryption. |
| 178 | * @cipher_status: Decryption status. |
Ivo van Doorn | 1ce9cda | 2008-12-02 18:19:48 +0100 | [diff] [blame] | 179 | * @iv: IV/EIV data used during decryption. |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 180 | * @icv: ICV data used during decryption. |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 181 | */ |
| 182 | struct rxdone_entry_desc { |
Ivo van Doorn | ae73e58 | 2008-07-04 16:14:59 +0200 | [diff] [blame] | 183 | u64 timestamp; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 184 | int signal; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 185 | int rssi; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 186 | int size; |
| 187 | int flags; |
Ivo van Doorn | 19d30e0 | 2008-03-15 21:38:07 +0100 | [diff] [blame] | 188 | int dev_flags; |
Ivo van Doorn | 35f00cf | 2009-04-26 16:09:32 +0200 | [diff] [blame] | 189 | u16 rate_mode; |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 190 | u8 cipher; |
| 191 | u8 cipher_status; |
| 192 | |
Ivo van Doorn | 1ce9cda | 2008-12-02 18:19:48 +0100 | [diff] [blame] | 193 | __le32 iv[2]; |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 194 | __le32 icv; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 195 | }; |
| 196 | |
| 197 | /** |
Ivo van Doorn | fb55f4d1 | 2008-05-10 13:42:06 +0200 | [diff] [blame] | 198 | * enum txdone_entry_desc_flags: Flags for &struct txdone_entry_desc |
| 199 | * |
Helmut Schaa | 46678b1 | 2010-06-14 22:08:30 +0200 | [diff] [blame] | 200 | * Every txdone report has to contain the basic result of the |
| 201 | * transmission, either &TXDONE_UNKNOWN, &TXDONE_SUCCESS or |
| 202 | * &TXDONE_FAILURE. The flag &TXDONE_FALLBACK can be used in |
| 203 | * conjunction with all of these flags but should only be set |
| 204 | * if retires > 0. The flag &TXDONE_EXCESSIVE_RETRY can only be used |
| 205 | * in conjunction with &TXDONE_FAILURE. |
| 206 | * |
Ivo van Doorn | fb55f4d1 | 2008-05-10 13:42:06 +0200 | [diff] [blame] | 207 | * @TXDONE_UNKNOWN: Hardware could not determine success of transmission. |
| 208 | * @TXDONE_SUCCESS: Frame was successfully send |
Helmut Schaa | 46678b1 | 2010-06-14 22:08:30 +0200 | [diff] [blame] | 209 | * @TXDONE_FALLBACK: Hardware used fallback rates for retries |
Ivo van Doorn | fb55f4d1 | 2008-05-10 13:42:06 +0200 | [diff] [blame] | 210 | * @TXDONE_FAILURE: Frame was not successfully send |
| 211 | * @TXDONE_EXCESSIVE_RETRY: In addition to &TXDONE_FAILURE, the |
| 212 | * frame transmission failed due to excessive retries. |
| 213 | */ |
| 214 | enum txdone_entry_desc_flags { |
Jochen Friedrich | f126cba | 2008-08-15 14:47:46 +0200 | [diff] [blame] | 215 | TXDONE_UNKNOWN, |
| 216 | TXDONE_SUCCESS, |
Benoit PAPILLAULT | 92ed48e | 2009-08-17 18:56:10 +0200 | [diff] [blame] | 217 | TXDONE_FALLBACK, |
Jochen Friedrich | f126cba | 2008-08-15 14:47:46 +0200 | [diff] [blame] | 218 | TXDONE_FAILURE, |
| 219 | TXDONE_EXCESSIVE_RETRY, |
Ivo van Doorn | fb55f4d1 | 2008-05-10 13:42:06 +0200 | [diff] [blame] | 220 | }; |
| 221 | |
| 222 | /** |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 223 | * struct txdone_entry_desc: TX done entry descriptor |
| 224 | * |
| 225 | * Summary of information that has been read from the TX frame descriptor |
| 226 | * after the device is done with transmission. |
| 227 | * |
Ivo van Doorn | fb55f4d1 | 2008-05-10 13:42:06 +0200 | [diff] [blame] | 228 | * @flags: TX done flags (See &enum txdone_entry_desc_flags). |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 229 | * @retry: Retry count. |
| 230 | */ |
| 231 | struct txdone_entry_desc { |
Ivo van Doorn | fb55f4d1 | 2008-05-10 13:42:06 +0200 | [diff] [blame] | 232 | unsigned long flags; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 233 | int retry; |
| 234 | }; |
| 235 | |
| 236 | /** |
| 237 | * enum txentry_desc_flags: Status flags for TX entry descriptor |
| 238 | * |
| 239 | * @ENTRY_TXD_RTS_FRAME: This frame is a RTS frame. |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 240 | * @ENTRY_TXD_CTS_FRAME: This frame is a CTS-to-self frame. |
Ivo van Doorn | 5adf6d6 | 2008-07-20 18:03:38 +0200 | [diff] [blame] | 241 | * @ENTRY_TXD_GENERATE_SEQ: This frame requires sequence counter. |
Ivo van Doorn | 61486e0 | 2008-05-10 13:42:31 +0200 | [diff] [blame] | 242 | * @ENTRY_TXD_FIRST_FRAGMENT: This is the first frame. |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 243 | * @ENTRY_TXD_MORE_FRAG: This frame is followed by another fragment. |
| 244 | * @ENTRY_TXD_REQ_TIMESTAMP: Require timestamp to be inserted. |
| 245 | * @ENTRY_TXD_BURST: This frame belongs to the same burst event. |
| 246 | * @ENTRY_TXD_ACK: An ACK is required for this frame. |
Ivo van Doorn | 61486e0 | 2008-05-10 13:42:31 +0200 | [diff] [blame] | 247 | * @ENTRY_TXD_RETRY_MODE: When set, the long retry count is used. |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 248 | * @ENTRY_TXD_ENCRYPT: This frame should be encrypted. |
| 249 | * @ENTRY_TXD_ENCRYPT_PAIRWISE: Use pairwise key table (instead of shared). |
| 250 | * @ENTRY_TXD_ENCRYPT_IV: Generate IV/EIV in hardware. |
| 251 | * @ENTRY_TXD_ENCRYPT_MMIC: Generate MIC in hardware. |
Ivo van Doorn | 35f00cf | 2009-04-26 16:09:32 +0200 | [diff] [blame] | 252 | * @ENTRY_TXD_HT_AMPDU: This frame is part of an AMPDU. |
| 253 | * @ENTRY_TXD_HT_BW_40: Use 40MHz Bandwidth. |
| 254 | * @ENTRY_TXD_HT_SHORT_GI: Use short GI. |
Ivo van Doorn | 84804cd | 2010-08-06 20:46:19 +0200 | [diff] [blame] | 255 | * @ENTRY_TXD_HT_MIMO_PS: The receiving STA is in dynamic SM PS mode. |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 256 | */ |
| 257 | enum txentry_desc_flags { |
| 258 | ENTRY_TXD_RTS_FRAME, |
Ivo van Doorn | 7050ec8 | 2008-05-10 13:46:13 +0200 | [diff] [blame] | 259 | ENTRY_TXD_CTS_FRAME, |
Ivo van Doorn | 5adf6d6 | 2008-07-20 18:03:38 +0200 | [diff] [blame] | 260 | ENTRY_TXD_GENERATE_SEQ, |
Ivo van Doorn | 61486e0 | 2008-05-10 13:42:31 +0200 | [diff] [blame] | 261 | ENTRY_TXD_FIRST_FRAGMENT, |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 262 | ENTRY_TXD_MORE_FRAG, |
| 263 | ENTRY_TXD_REQ_TIMESTAMP, |
| 264 | ENTRY_TXD_BURST, |
| 265 | ENTRY_TXD_ACK, |
Ivo van Doorn | 61486e0 | 2008-05-10 13:42:31 +0200 | [diff] [blame] | 266 | ENTRY_TXD_RETRY_MODE, |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 267 | ENTRY_TXD_ENCRYPT, |
| 268 | ENTRY_TXD_ENCRYPT_PAIRWISE, |
| 269 | ENTRY_TXD_ENCRYPT_IV, |
| 270 | ENTRY_TXD_ENCRYPT_MMIC, |
Ivo van Doorn | 35f00cf | 2009-04-26 16:09:32 +0200 | [diff] [blame] | 271 | ENTRY_TXD_HT_AMPDU, |
| 272 | ENTRY_TXD_HT_BW_40, |
| 273 | ENTRY_TXD_HT_SHORT_GI, |
Ivo van Doorn | 84804cd | 2010-08-06 20:46:19 +0200 | [diff] [blame] | 274 | ENTRY_TXD_HT_MIMO_PS, |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 275 | }; |
| 276 | |
| 277 | /** |
| 278 | * struct txentry_desc: TX Entry descriptor |
| 279 | * |
| 280 | * Summary of information for the frame descriptor before sending a TX frame. |
| 281 | * |
| 282 | * @flags: Descriptor flags (See &enum queue_entry_flags). |
Gertjan van Wingerde | df624ca | 2010-05-03 22:43:05 +0200 | [diff] [blame] | 283 | * @length: Length of the entire frame. |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 284 | * @header_length: Length of 802.11 header. |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 285 | * @length_high: PLCP length high word. |
| 286 | * @length_low: PLCP length low word. |
| 287 | * @signal: PLCP signal. |
| 288 | * @service: PLCP service. |
Ivo van Doorn | 35f00cf | 2009-04-26 16:09:32 +0200 | [diff] [blame] | 289 | * @msc: MCS. |
| 290 | * @stbc: STBC. |
| 291 | * @ba_size: BA size. |
Ivo van Doorn | 076f958 | 2008-12-20 10:59:02 +0100 | [diff] [blame] | 292 | * @rate_mode: Rate mode (See @enum rate_modulation). |
Ivo van Doorn | 35f00cf | 2009-04-26 16:09:32 +0200 | [diff] [blame] | 293 | * @mpdu_density: MDPU density. |
Ivo van Doorn | 61486e0 | 2008-05-10 13:42:31 +0200 | [diff] [blame] | 294 | * @retry_limit: Max number of retries. |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 295 | * @ifs: IFS value. |
Helmut Schaa | 1affa09 | 2010-05-07 11:03:08 +0200 | [diff] [blame] | 296 | * @txop: IFS value for 11n capable chips. |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 297 | * @cipher: Cipher type used for encryption. |
| 298 | * @key_idx: Key index used for encryption. |
| 299 | * @iv_offset: Position where IV should be inserted by hardware. |
Ivo van Doorn | 9eb4e21 | 2009-04-26 16:08:30 +0200 | [diff] [blame] | 300 | * @iv_len: Length of IV data. |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 301 | */ |
| 302 | struct txentry_desc { |
| 303 | unsigned long flags; |
| 304 | |
Gertjan van Wingerde | df624ca | 2010-05-03 22:43:05 +0200 | [diff] [blame] | 305 | u16 length; |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 306 | u16 header_length; |
Ivo van Doorn | 9f16617 | 2009-04-26 16:08:50 +0200 | [diff] [blame] | 307 | |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 308 | u16 length_high; |
| 309 | u16 length_low; |
| 310 | u16 signal; |
| 311 | u16 service; |
| 312 | |
Ivo van Doorn | 35f00cf | 2009-04-26 16:09:32 +0200 | [diff] [blame] | 313 | u16 mcs; |
| 314 | u16 stbc; |
| 315 | u16 ba_size; |
Ivo van Doorn | 076f958 | 2008-12-20 10:59:02 +0100 | [diff] [blame] | 316 | u16 rate_mode; |
Ivo van Doorn | 35f00cf | 2009-04-26 16:09:32 +0200 | [diff] [blame] | 317 | u16 mpdu_density; |
Ivo van Doorn | 076f958 | 2008-12-20 10:59:02 +0100 | [diff] [blame] | 318 | |
Ivo van Doorn | 61486e0 | 2008-05-10 13:42:31 +0200 | [diff] [blame] | 319 | short retry_limit; |
Ivo van Doorn | 61486e0 | 2008-05-10 13:42:31 +0200 | [diff] [blame] | 320 | short ifs; |
Helmut Schaa | 1affa09 | 2010-05-07 11:03:08 +0200 | [diff] [blame] | 321 | short txop; |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 322 | |
| 323 | enum cipher cipher; |
| 324 | u16 key_idx; |
| 325 | u16 iv_offset; |
Ivo van Doorn | 9eb4e21 | 2009-04-26 16:08:30 +0200 | [diff] [blame] | 326 | u16 iv_len; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 327 | }; |
| 328 | |
| 329 | /** |
| 330 | * enum queue_entry_flags: Status flags for queue entry |
| 331 | * |
| 332 | * @ENTRY_BCN_ASSIGNED: This entry has been assigned to an interface. |
| 333 | * As long as this bit is set, this entry may only be touched |
| 334 | * through the interface structure. |
| 335 | * @ENTRY_OWNER_DEVICE_DATA: This entry is owned by the device for data |
| 336 | * transfer (either TX or RX depending on the queue). The entry should |
| 337 | * only be touched after the device has signaled it is done with it. |
Ivo van Doorn | f019d51 | 2008-06-06 22:47:39 +0200 | [diff] [blame] | 338 | * @ENTRY_DATA_PENDING: This entry contains a valid frame and is waiting |
| 339 | * for the signal to start sending. |
Ivo van Doorn | 7e613e1 | 2010-08-06 20:45:38 +0200 | [diff] [blame] | 340 | * @ENTRY_DATA_IO_FAILED: Hardware indicated that an IO error occured |
| 341 | * while transfering the data to the hardware. No TX status report will |
| 342 | * be expected from the hardware. |
Ivo van Doorn | dba5dc1 | 2010-12-13 12:36:18 +0100 | [diff] [blame] | 343 | * @ENTRY_DATA_STATUS_PENDING: The entry has been send to the device and |
| 344 | * returned. It is now waiting for the status reporting before the |
| 345 | * entry can be reused again. |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 346 | */ |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 347 | enum queue_entry_flags { |
| 348 | ENTRY_BCN_ASSIGNED, |
| 349 | ENTRY_OWNER_DEVICE_DATA, |
Ivo van Doorn | f019d51 | 2008-06-06 22:47:39 +0200 | [diff] [blame] | 350 | ENTRY_DATA_PENDING, |
Ivo van Doorn | dba5dc1 | 2010-12-13 12:36:18 +0100 | [diff] [blame] | 351 | ENTRY_DATA_IO_FAILED, |
| 352 | ENTRY_DATA_STATUS_PENDING, |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 353 | }; |
| 354 | |
| 355 | /** |
| 356 | * struct queue_entry: Entry inside the &struct data_queue |
| 357 | * |
| 358 | * @flags: Entry flags, see &enum queue_entry_flags. |
| 359 | * @queue: The data queue (&struct data_queue) to which this entry belongs. |
| 360 | * @skb: The buffer which is currently being transmitted (for TX queue), |
| 361 | * or used to directly recieve data in (for RX queue). |
| 362 | * @entry_idx: The entry index number. |
| 363 | * @priv_data: Private data belonging to this queue entry. The pointer |
| 364 | * points to data specific to a particular driver and queue type. |
| 365 | */ |
| 366 | struct queue_entry { |
| 367 | unsigned long flags; |
| 368 | |
| 369 | struct data_queue *queue; |
| 370 | |
| 371 | struct sk_buff *skb; |
| 372 | |
| 373 | unsigned int entry_idx; |
| 374 | |
| 375 | void *priv_data; |
| 376 | }; |
| 377 | |
| 378 | /** |
| 379 | * enum queue_index: Queue index type |
| 380 | * |
| 381 | * @Q_INDEX: Index pointer to the current entry in the queue, if this entry is |
| 382 | * owned by the hardware then the queue is considered to be full. |
Ivo van Doorn | 652a9dd | 2010-08-30 21:15:19 +0200 | [diff] [blame] | 383 | * @Q_INDEX_DMA_DONE: Index pointer for the next entry which will have been |
| 384 | * transfered to the hardware. |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 385 | * @Q_INDEX_DONE: Index pointer to the next entry which will be completed by |
| 386 | * the hardware and for which we need to run the txdone handler. If this |
| 387 | * entry is not owned by the hardware the queue is considered to be empty. |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 388 | * @Q_INDEX_MAX: Keep last, used in &struct data_queue to determine the size |
| 389 | * of the index array. |
| 390 | */ |
| 391 | enum queue_index { |
| 392 | Q_INDEX, |
Ivo van Doorn | 652a9dd | 2010-08-30 21:15:19 +0200 | [diff] [blame] | 393 | Q_INDEX_DMA_DONE, |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 394 | Q_INDEX_DONE, |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 395 | Q_INDEX_MAX, |
| 396 | }; |
| 397 | |
| 398 | /** |
Ivo van Doorn | 0b7fde5 | 2010-12-13 12:35:17 +0100 | [diff] [blame] | 399 | * enum data_queue_flags: Status flags for data queues |
| 400 | * |
| 401 | * @QUEUE_STARTED: The queue has been started. Fox RX queues this means the |
| 402 | * device might be DMA'ing skbuffers. TX queues will accept skbuffers to |
| 403 | * be transmitted and beacon queues will start beaconing the configured |
| 404 | * beacons. |
| 405 | * @QUEUE_PAUSED: The queue has been started but is currently paused. |
| 406 | * When this bit is set, the queue has been stopped in mac80211, |
| 407 | * preventing new frames to be enqueued. However, a few frames |
| 408 | * might still appear shortly after the pausing... |
| 409 | */ |
| 410 | enum data_queue_flags { |
| 411 | QUEUE_STARTED, |
| 412 | QUEUE_PAUSED, |
| 413 | }; |
| 414 | |
| 415 | /** |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 416 | * struct data_queue: Data queue |
| 417 | * |
| 418 | * @rt2x00dev: Pointer to main &struct rt2x00dev where this queue belongs to. |
| 419 | * @entries: Base address of the &struct queue_entry which are |
| 420 | * part of this queue. |
| 421 | * @qid: The queue identification, see &enum data_queue_qid. |
Ivo van Doorn | 0b7fde5 | 2010-12-13 12:35:17 +0100 | [diff] [blame] | 422 | * @flags: Entry flags, see &enum queue_entry_flags. |
| 423 | * @status_lock: The mutex for protecting the start/stop/flush |
| 424 | * handling on this queue. |
Ivo van Doorn | 813f033 | 2010-11-06 15:48:05 +0100 | [diff] [blame] | 425 | * @index_lock: Spinlock to protect index handling. Whenever @index, @index_done or |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 426 | * @index_crypt needs to be changed this lock should be grabbed to prevent |
| 427 | * index corruption due to concurrency. |
| 428 | * @count: Number of frames handled in the queue. |
| 429 | * @limit: Maximum number of entries in the queue. |
Ivo van Doorn | b869767 | 2008-06-06 22:53:14 +0200 | [diff] [blame] | 430 | * @threshold: Minimum number of free entries before queue is kicked by force. |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 431 | * @length: Number of frames in queue. |
| 432 | * @index: Index pointers to entry positions in the queue, |
| 433 | * use &enum queue_index to get a specific index field. |
Ivo van Doorn | 2af0a57 | 2008-08-29 21:05:45 +0200 | [diff] [blame] | 434 | * @txop: maximum burst time. |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 435 | * @aifs: The aifs value for outgoing frames (field ignored in RX queue). |
| 436 | * @cw_min: The cw min value for outgoing frames (field ignored in RX queue). |
| 437 | * @cw_max: The cw max value for outgoing frames (field ignored in RX queue). |
| 438 | * @data_size: Maximum data size for the frames in this queue. |
| 439 | * @desc_size: Hardware descriptor size for the data in this queue. |
Ivo van Doorn | f1ca216 | 2008-11-13 23:07:33 +0100 | [diff] [blame] | 440 | * @usb_endpoint: Device endpoint used for communication (USB only) |
| 441 | * @usb_maxpacket: Max packet size for given endpoint (USB only) |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 442 | */ |
| 443 | struct data_queue { |
| 444 | struct rt2x00_dev *rt2x00dev; |
| 445 | struct queue_entry *entries; |
| 446 | |
| 447 | enum data_queue_qid qid; |
Ivo van Doorn | 0b7fde5 | 2010-12-13 12:35:17 +0100 | [diff] [blame] | 448 | unsigned long flags; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 449 | |
Ivo van Doorn | 0b7fde5 | 2010-12-13 12:35:17 +0100 | [diff] [blame] | 450 | struct mutex status_lock; |
Ivo van Doorn | 813f033 | 2010-11-06 15:48:05 +0100 | [diff] [blame] | 451 | spinlock_t index_lock; |
Ivo van Doorn | 0b7fde5 | 2010-12-13 12:35:17 +0100 | [diff] [blame] | 452 | |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 453 | unsigned int count; |
| 454 | unsigned short limit; |
Ivo van Doorn | b869767 | 2008-06-06 22:53:14 +0200 | [diff] [blame] | 455 | unsigned short threshold; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 456 | unsigned short length; |
| 457 | unsigned short index[Q_INDEX_MAX]; |
Ivo van Doorn | 652a9dd | 2010-08-30 21:15:19 +0200 | [diff] [blame] | 458 | unsigned long last_action[Q_INDEX_MAX]; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 459 | |
Ivo van Doorn | 2af0a57 | 2008-08-29 21:05:45 +0200 | [diff] [blame] | 460 | unsigned short txop; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 461 | unsigned short aifs; |
| 462 | unsigned short cw_min; |
| 463 | unsigned short cw_max; |
| 464 | |
| 465 | unsigned short data_size; |
| 466 | unsigned short desc_size; |
Ivo van Doorn | f1ca216 | 2008-11-13 23:07:33 +0100 | [diff] [blame] | 467 | |
| 468 | unsigned short usb_endpoint; |
| 469 | unsigned short usb_maxpacket; |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 470 | }; |
| 471 | |
| 472 | /** |
| 473 | * struct data_queue_desc: Data queue description |
| 474 | * |
| 475 | * The information in this structure is used by drivers |
| 476 | * to inform rt2x00lib about the creation of the data queue. |
| 477 | * |
| 478 | * @entry_num: Maximum number of entries for a queue. |
| 479 | * @data_size: Maximum data size for the frames in this queue. |
| 480 | * @desc_size: Hardware descriptor size for the data in this queue. |
| 481 | * @priv_size: Size of per-queue_entry private data. |
| 482 | */ |
| 483 | struct data_queue_desc { |
| 484 | unsigned short entry_num; |
| 485 | unsigned short data_size; |
| 486 | unsigned short desc_size; |
| 487 | unsigned short priv_size; |
| 488 | }; |
| 489 | |
| 490 | /** |
| 491 | * queue_end - Return pointer to the last queue (HELPER MACRO). |
| 492 | * @__dev: Pointer to &struct rt2x00_dev |
| 493 | * |
| 494 | * Using the base rx pointer and the maximum number of available queues, |
| 495 | * this macro will return the address of 1 position beyond the end of the |
| 496 | * queues array. |
| 497 | */ |
| 498 | #define queue_end(__dev) \ |
| 499 | &(__dev)->rx[(__dev)->data_queues] |
| 500 | |
| 501 | /** |
| 502 | * tx_queue_end - Return pointer to the last TX queue (HELPER MACRO). |
| 503 | * @__dev: Pointer to &struct rt2x00_dev |
| 504 | * |
| 505 | * Using the base tx pointer and the maximum number of available TX |
| 506 | * queues, this macro will return the address of 1 position beyond |
| 507 | * the end of the TX queue array. |
| 508 | */ |
| 509 | #define tx_queue_end(__dev) \ |
Gertjan van Wingerde | 61448f8 | 2008-05-10 13:43:33 +0200 | [diff] [blame] | 510 | &(__dev)->tx[(__dev)->ops->tx_queues] |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 511 | |
| 512 | /** |
Ivo van Doorn | f1ca216 | 2008-11-13 23:07:33 +0100 | [diff] [blame] | 513 | * queue_next - Return pointer to next queue in list (HELPER MACRO). |
| 514 | * @__queue: Current queue for which we need the next queue |
| 515 | * |
| 516 | * Using the current queue address we take the address directly |
| 517 | * after the queue to take the next queue. Note that this macro |
| 518 | * should be used carefully since it does not protect against |
| 519 | * moving past the end of the list. (See macros &queue_end and |
| 520 | * &tx_queue_end for determining the end of the queue). |
| 521 | */ |
| 522 | #define queue_next(__queue) \ |
| 523 | &(__queue)[1] |
| 524 | |
| 525 | /** |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 526 | * queue_loop - Loop through the queues within a specific range (HELPER MACRO). |
| 527 | * @__entry: Pointer where the current queue entry will be stored in. |
| 528 | * @__start: Start queue pointer. |
| 529 | * @__end: End queue pointer. |
| 530 | * |
| 531 | * This macro will loop through all queues between &__start and &__end. |
| 532 | */ |
| 533 | #define queue_loop(__entry, __start, __end) \ |
| 534 | for ((__entry) = (__start); \ |
Ivo van Doorn | f1ca216 | 2008-11-13 23:07:33 +0100 | [diff] [blame] | 535 | prefetch(queue_next(__entry)), (__entry) != (__end);\ |
| 536 | (__entry) = queue_next(__entry)) |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 537 | |
| 538 | /** |
| 539 | * queue_for_each - Loop through all queues |
| 540 | * @__dev: Pointer to &struct rt2x00_dev |
| 541 | * @__entry: Pointer where the current queue entry will be stored in. |
| 542 | * |
| 543 | * This macro will loop through all available queues. |
| 544 | */ |
| 545 | #define queue_for_each(__dev, __entry) \ |
| 546 | queue_loop(__entry, (__dev)->rx, queue_end(__dev)) |
| 547 | |
| 548 | /** |
| 549 | * tx_queue_for_each - Loop through the TX queues |
| 550 | * @__dev: Pointer to &struct rt2x00_dev |
| 551 | * @__entry: Pointer where the current queue entry will be stored in. |
| 552 | * |
| 553 | * This macro will loop through all TX related queues excluding |
| 554 | * the Beacon and Atim queues. |
| 555 | */ |
| 556 | #define tx_queue_for_each(__dev, __entry) \ |
| 557 | queue_loop(__entry, (__dev)->tx, tx_queue_end(__dev)) |
| 558 | |
| 559 | /** |
| 560 | * txall_queue_for_each - Loop through all TX related queues |
| 561 | * @__dev: Pointer to &struct rt2x00_dev |
| 562 | * @__entry: Pointer where the current queue entry will be stored in. |
| 563 | * |
| 564 | * This macro will loop through all TX related queues including |
| 565 | * the Beacon and Atim queues. |
| 566 | */ |
| 567 | #define txall_queue_for_each(__dev, __entry) \ |
| 568 | queue_loop(__entry, (__dev)->tx, queue_end(__dev)) |
| 569 | |
| 570 | /** |
Ivo van Doorn | 5eb7efe | 2010-08-23 19:54:21 +0200 | [diff] [blame] | 571 | * rt2x00queue_for_each_entry - Loop through all entries in the queue |
| 572 | * @queue: Pointer to @data_queue |
| 573 | * @start: &enum queue_index Pointer to start index |
| 574 | * @end: &enum queue_index Pointer to end index |
| 575 | * @fn: The function to call for each &struct queue_entry |
| 576 | * |
| 577 | * This will walk through all entries in the queue, in chronological |
| 578 | * order. This means it will start at the current @start pointer |
| 579 | * and will walk through the queue until it reaches the @end pointer. |
| 580 | */ |
| 581 | void rt2x00queue_for_each_entry(struct data_queue *queue, |
| 582 | enum queue_index start, |
| 583 | enum queue_index end, |
| 584 | void (*fn)(struct queue_entry *entry)); |
| 585 | |
| 586 | /** |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 587 | * rt2x00queue_empty - Check if the queue is empty. |
| 588 | * @queue: Queue to check if empty. |
| 589 | */ |
| 590 | static inline int rt2x00queue_empty(struct data_queue *queue) |
| 591 | { |
| 592 | return queue->length == 0; |
| 593 | } |
| 594 | |
| 595 | /** |
| 596 | * rt2x00queue_full - Check if the queue is full. |
| 597 | * @queue: Queue to check if full. |
| 598 | */ |
| 599 | static inline int rt2x00queue_full(struct data_queue *queue) |
| 600 | { |
| 601 | return queue->length == queue->limit; |
| 602 | } |
| 603 | |
| 604 | /** |
| 605 | * rt2x00queue_free - Check the number of available entries in queue. |
| 606 | * @queue: Queue to check. |
| 607 | */ |
| 608 | static inline int rt2x00queue_available(struct data_queue *queue) |
| 609 | { |
| 610 | return queue->limit - queue->length; |
| 611 | } |
| 612 | |
| 613 | /** |
Ivo van Doorn | b869767 | 2008-06-06 22:53:14 +0200 | [diff] [blame] | 614 | * rt2x00queue_threshold - Check if the queue is below threshold |
| 615 | * @queue: Queue to check. |
| 616 | */ |
| 617 | static inline int rt2x00queue_threshold(struct data_queue *queue) |
| 618 | { |
| 619 | return rt2x00queue_available(queue) < queue->threshold; |
| 620 | } |
| 621 | |
| 622 | /** |
Ivo van Doorn | 7225ce1 | 2010-11-04 20:39:23 +0100 | [diff] [blame] | 623 | * rt2x00queue_status_timeout - Check if a timeout occured for STATUS reports |
Ivo van Doorn | c965c74 | 2010-07-11 12:25:46 +0200 | [diff] [blame] | 624 | * @queue: Queue to check. |
| 625 | */ |
Ivo van Doorn | 7225ce1 | 2010-11-04 20:39:23 +0100 | [diff] [blame] | 626 | static inline int rt2x00queue_status_timeout(struct data_queue *queue) |
Ivo van Doorn | c965c74 | 2010-07-11 12:25:46 +0200 | [diff] [blame] | 627 | { |
Ivo van Doorn | 652a9dd | 2010-08-30 21:15:19 +0200 | [diff] [blame] | 628 | return time_after(queue->last_action[Q_INDEX_DMA_DONE], |
| 629 | queue->last_action[Q_INDEX_DONE] + (HZ / 10)); |
| 630 | } |
| 631 | |
| 632 | /** |
| 633 | * rt2x00queue_timeout - Check if a timeout occured for DMA transfers |
| 634 | * @queue: Queue to check. |
| 635 | */ |
| 636 | static inline int rt2x00queue_dma_timeout(struct data_queue *queue) |
| 637 | { |
| 638 | return time_after(queue->last_action[Q_INDEX], |
| 639 | queue->last_action[Q_INDEX_DMA_DONE] + (HZ / 10)); |
Ivo van Doorn | c965c74 | 2010-07-11 12:25:46 +0200 | [diff] [blame] | 640 | } |
| 641 | |
| 642 | /** |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 643 | * _rt2x00_desc_read - Read a word from the hardware descriptor. |
| 644 | * @desc: Base descriptor address |
| 645 | * @word: Word index from where the descriptor should be read. |
| 646 | * @value: Address where the descriptor value should be written into. |
| 647 | */ |
| 648 | static inline void _rt2x00_desc_read(__le32 *desc, const u8 word, __le32 *value) |
| 649 | { |
| 650 | *value = desc[word]; |
| 651 | } |
| 652 | |
| 653 | /** |
| 654 | * rt2x00_desc_read - Read a word from the hardware descriptor, this |
| 655 | * function will take care of the byte ordering. |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 656 | * @desc: Base descriptor address |
| 657 | * @word: Word index from where the descriptor should be read. |
| 658 | * @value: Address where the descriptor value should be written into. |
| 659 | */ |
| 660 | static inline void rt2x00_desc_read(__le32 *desc, const u8 word, u32 *value) |
| 661 | { |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 662 | __le32 tmp; |
| 663 | _rt2x00_desc_read(desc, word, &tmp); |
| 664 | *value = le32_to_cpu(tmp); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 665 | } |
| 666 | |
| 667 | /** |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 668 | * rt2x00_desc_write - write a word to the hardware descriptor, this |
| 669 | * function will take care of the byte ordering. |
| 670 | * @desc: Base descriptor address |
| 671 | * @word: Word index from where the descriptor should be written. |
| 672 | * @value: Value that should be written into the descriptor. |
| 673 | */ |
| 674 | static inline void _rt2x00_desc_write(__le32 *desc, const u8 word, __le32 value) |
| 675 | { |
| 676 | desc[word] = value; |
| 677 | } |
| 678 | |
| 679 | /** |
| 680 | * rt2x00_desc_write - write a word to the hardware descriptor. |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 681 | * @desc: Base descriptor address |
| 682 | * @word: Word index from where the descriptor should be written. |
| 683 | * @value: Value that should be written into the descriptor. |
| 684 | */ |
| 685 | static inline void rt2x00_desc_write(__le32 *desc, const u8 word, u32 value) |
| 686 | { |
Ivo van Doorn | 2bb057d | 2008-08-04 16:37:44 +0200 | [diff] [blame] | 687 | _rt2x00_desc_write(desc, word, cpu_to_le32(value)); |
Ivo van Doorn | 181d690 | 2008-02-05 16:42:23 -0500 | [diff] [blame] | 688 | } |
| 689 | |
| 690 | #endif /* RT2X00QUEUE_H */ |