wlcore: Propagate errors from wl1271_read
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / net / wireless / ti / wlcore / tx.h
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1/*
2 * This file is part of wl1271
3 *
4 * Copyright (C) 1998-2009 Texas Instruments. All rights reserved.
5 * Copyright (C) 2009 Nokia Corporation
6 *
7 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * version 2 as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
21 * 02110-1301 USA
22 *
23 */
24
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25#ifndef __TX_H__
26#define __TX_H__
f5fc0f86 27
f5fc0f86 28#define TX_HW_MGMT_PKT_LIFETIME_TU 2000
beb6c880 29#define TX_HW_AP_MODE_PKT_LIFETIME_TU 8000
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30
31#define TX_HW_ATTR_SAVE_RETRIES BIT(0)
32#define TX_HW_ATTR_HEADER_PAD BIT(1)
33#define TX_HW_ATTR_SESSION_COUNTER (BIT(2) | BIT(3) | BIT(4))
34#define TX_HW_ATTR_RATE_POLICY (BIT(5) | BIT(6) | BIT(7) | \
35 BIT(8) | BIT(9))
36#define TX_HW_ATTR_LAST_WORD_PAD (BIT(10) | BIT(11))
37#define TX_HW_ATTR_TX_CMPLT_REQ BIT(12)
ae47c45f 38#define TX_HW_ATTR_TX_DUMMY_REQ BIT(13)
f4f57943 39#define TX_HW_ATTR_HOST_ENCRYPT BIT(14)
ae47c45f 40
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41#define TX_HW_ATTR_OFST_SAVE_RETRIES 0
42#define TX_HW_ATTR_OFST_HEADER_PAD 1
43#define TX_HW_ATTR_OFST_SESSION_COUNTER 2
44#define TX_HW_ATTR_OFST_RATE_POLICY 5
45#define TX_HW_ATTR_OFST_LAST_WORD_PAD 10
46#define TX_HW_ATTR_OFST_TX_CMPLT_REQ 12
47
48#define TX_HW_RESULT_QUEUE_LEN 16
49#define TX_HW_RESULT_QUEUE_LEN_MASK 0xf
50
51#define WL1271_TX_ALIGN_TO 4
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52#define WL1271_EXTRA_SPACE_TKIP 4
53#define WL1271_EXTRA_SPACE_AES 8
54#define WL1271_EXTRA_SPACE_MAX 8
f5fc0f86 55
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56/* Used for management frames and dummy packets */
57#define WL1271_TID_MGMT 7
58
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59struct wl127x_tx_mem {
60 /*
61 * Number of extra memory blocks to allocate for this packet
62 * in addition to the number of blocks derived from the packet
63 * length.
64 */
65 u8 extra_blocks;
66 /*
67 * Total number of memory blocks allocated by the host for
68 * this packet. Must be equal or greater than the actual
69 * blocks number allocated by HW.
70 */
71 u8 total_mem_blocks;
72} __packed;
73
74struct wl128x_tx_mem {
75 /*
76 * Total number of memory blocks allocated by the host for
77 * this packet.
78 */
79 u8 total_mem_blocks;
80 /*
81 * Number of extra bytes, at the end of the frame. the host
82 * uses this padding to complete each frame to integer number
83 * of SDIO blocks.
84 */
85 u8 extra_bytes;
86} __packed;
87
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88struct wl18xx_tx_mem {
89 /*
90 * Total number of memory blocks allocated by the host for
91 * this packet.
92 */
93 u8 total_mem_blocks;
94
95 /*
9fccc82e 96 * control bits
fb0f2e4a 97 */
9fccc82e 98 u8 ctrl;
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99} __packed;
100
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101/*
102 * On wl128x based devices, when TX packets are aggregated, each packet
103 * size must be aligned to the SDIO block size. The maximum block size
104 * is bounded by the type of the padded bytes field that is sent to the
105 * FW. Currently the type is u8, so the maximum block size is 256 bytes.
106 */
107#define WL12XX_BUS_BLOCK_SIZE min(512u, \
108 (1u << (8 * sizeof(((struct wl128x_tx_mem *) 0)->extra_bytes))))
109
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110struct wl1271_tx_hw_descr {
111 /* Length of packet in words, including descriptor+header+data */
d0f63b20 112 __le16 length;
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113 union {
114 struct wl127x_tx_mem wl127x_mem;
115 struct wl128x_tx_mem wl128x_mem;
fb0f2e4a 116 struct wl18xx_tx_mem wl18xx_mem;
48a61477 117 } __packed;
f5fc0f86 118 /* Device time (in us) when the packet arrived to the driver */
d0f63b20 119 __le32 start_time;
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120 /*
121 * Max delay in TUs until transmission. The last device time the
122 * packet can be transmitted is: start_time + (1024 * life_time)
123 */
d0f63b20 124 __le16 life_time;
f5fc0f86 125 /* Bitwise fields - see TX_ATTR... definitions above. */
d0f63b20 126 __le16 tx_attr;
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127 /* Packet identifier used also in the Tx-Result. */
128 u8 id;
129 /* The packet TID value (as User-Priority) */
130 u8 tid;
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131 /* host link ID (HLID) */
132 u8 hlid;
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133
134 union {
135 u8 wl12xx_reserved;
136
137 /*
138 * bit 0 -> 0 = udp, 1 = tcp
139 * bit 1:7 -> IP header offset
140 */
141 u8 wl18xx_checksum_data;
142 } __packed;
ba2d3587 143} __packed;
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144
145enum wl1271_tx_hw_res_status {
146 TX_SUCCESS = 0,
147 TX_HW_ERROR = 1,
148 TX_DISABLED = 2,
149 TX_RETRY_EXCEEDED = 3,
150 TX_TIMEOUT = 4,
151 TX_KEY_NOT_FOUND = 5,
152 TX_PEER_NOT_FOUND = 6,
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153 TX_SESSION_MISMATCH = 7,
154 TX_LINK_NOT_VALID = 8,
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155};
156
157struct wl1271_tx_hw_res_descr {
158 /* Packet Identifier - same value used in the Tx descriptor.*/
159 u8 id;
160 /* The status of the transmission, indicating success or one of
161 several possible reasons for failure. */
162 u8 status;
163 /* Total air access duration including all retrys and overheads.*/
d0f63b20 164 __le16 medium_usage;
f5fc0f86 165 /* The time passed from host xfer to Tx-complete.*/
d0f63b20 166 __le32 fw_handling_time;
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167 /* Total media delay
168 (from 1st EDCA AIFS counter until TX Complete). */
d0f63b20 169 __le32 medium_delay;
f5fc0f86 170 /* LS-byte of last TKIP seq-num (saved per AC for recovery). */
b992c682 171 u8 tx_security_sequence_number_lsb;
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172 /* Retry count - number of transmissions without successful ACK.*/
173 u8 ack_failures;
174 /* The rate that succeeded getting ACK
175 (Valid only if status=SUCCESS). */
176 u8 rate_class_index;
177 /* for 4-byte alignment. */
178 u8 spare;
ba2d3587 179} __packed;
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180
181struct wl1271_tx_hw_res_if {
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182 __le32 tx_result_fw_counter;
183 __le32 tx_result_host_counter;
f5fc0f86 184 struct wl1271_tx_hw_res_descr tx_results_queue[TX_HW_RESULT_QUEUE_LEN];
ba2d3587 185} __packed;
f5fc0f86 186
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187enum wlcore_queue_stop_reason {
188 WLCORE_QUEUE_STOP_REASON_WATERMARK,
189 WLCORE_QUEUE_STOP_REASON_FW_RESTART,
2c38849f 190 WLCORE_QUEUE_STOP_REASON_FLUSH,
a1c597f2 191 WLCORE_QUEUE_STOP_REASON_SPARE_BLK, /* 18xx specific */
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192};
193
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194static inline int wl1271_tx_get_queue(int queue)
195{
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196 switch (queue) {
197 case 0:
198 return CONF_TX_AC_VO;
199 case 1:
200 return CONF_TX_AC_VI;
201 case 2:
202 return CONF_TX_AC_BE;
203 case 3:
204 return CONF_TX_AC_BK;
205 default:
206 return CONF_TX_AC_BE;
207 }
208}
209
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210static inline int wl1271_tx_get_mac80211_queue(int queue)
211{
212 switch (queue) {
213 case CONF_TX_AC_VO:
214 return 0;
215 case CONF_TX_AC_VI:
216 return 1;
217 case CONF_TX_AC_BE:
218 return 2;
219 case CONF_TX_AC_BK:
220 return 3;
221 default:
222 return 2;
223 }
224}
225
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226static inline int wl1271_tx_total_queue_count(struct wl1271 *wl)
227{
228 int i, count = 0;
229
230 for (i = 0; i < NUM_TX_QUEUES; i++)
231 count += wl->tx_queue_count[i];
232
233 return count;
234}
235
f5fc0f86 236void wl1271_tx_work(struct work_struct *work);
a32d0cdf 237void wl1271_tx_work_locked(struct wl1271 *wl);
045b9b5f 238int wlcore_tx_complete(struct wl1271 *wl);
d6a3cc2e 239void wl12xx_tx_reset_wlvif(struct wl1271 *wl, struct wl12xx_vif *wlvif);
66396114 240void wl12xx_tx_reset(struct wl1271 *wl);
f5fc0f86 241void wl1271_tx_flush(struct wl1271 *wl);
43a8bc5a 242u8 wlcore_rate_to_idx(struct wl1271 *wl, u8 rate, enum ieee80211_band band);
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243u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set,
244 enum ieee80211_band rate_band);
245u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set);
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246u8 wl12xx_tx_get_hlid_ap(struct wl1271 *wl, struct wl12xx_vif *wlvif,
247 struct sk_buff *skb);
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248u8 wl12xx_tx_get_hlid(struct wl1271 *wl, struct wl12xx_vif *wlvif,
249 struct sk_buff *skb);
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250void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid);
251void wl1271_handle_tx_low_watermark(struct wl1271 *wl);
f8e0af6b 252bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb);
9eb599e9 253void wl12xx_rearm_rx_streaming(struct wl1271 *wl, unsigned long *active_hlids);
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254unsigned int wlcore_calc_packet_alignment(struct wl1271 *wl,
255 unsigned int packet_length);
872b345f 256void wl1271_free_tx_id(struct wl1271 *wl, int id);
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257void wlcore_stop_queue_locked(struct wl1271 *wl, u8 queue,
258 enum wlcore_queue_stop_reason reason);
259void wlcore_stop_queue(struct wl1271 *wl, u8 queue,
260 enum wlcore_queue_stop_reason reason);
261void wlcore_wake_queue(struct wl1271 *wl, u8 queue,
262 enum wlcore_queue_stop_reason reason);
263void wlcore_stop_queues(struct wl1271 *wl,
264 enum wlcore_queue_stop_reason reason);
265void wlcore_wake_queues(struct wl1271 *wl,
266 enum wlcore_queue_stop_reason reason);
267void wlcore_reset_stopped_queues(struct wl1271 *wl);
268bool wlcore_is_queue_stopped_by_reason(struct wl1271 *wl, u8 queue,
269 enum wlcore_queue_stop_reason reason);
270bool wlcore_is_queue_stopped(struct wl1271 *wl, u8 queue);
f5fc0f86 271
f1acea9a 272/* from main.c */
c7ffb902 273void wl1271_free_sta(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 hlid);
55df5afb 274void wl12xx_rearm_tx_watchdog_locked(struct wl1271 *wl);
f1acea9a 275
f5fc0f86 276#endif