1 /*
2  * Shared Atheros AR9170 Header
3  *
4  * RX/TX meta descriptor format
5  *
6  * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
7  * Copyright 2009-2011 Christian Lamparter <chunkeey@googlemail.com>
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU 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; see the file COPYING.  If not, see
20  * http://www.gnu.org/licenses/.
21  *
22  * This file incorporates work covered by the following copyright and
23  * permission notice:
24  *    Copyright (c) 2007-2008 Atheros Communications, Inc.
25  *
26  *    Permission to use, copy, modify, and/or distribute this software for any
27  *    purpose with or without fee is hereby granted, provided that the above
28  *    copyright notice and this permission notice appear in all copies.
29  *
30  *    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
31  *    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
32  *    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
33  *    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
34  *    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
35  *    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
36  *    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
37  */
38 
39 #ifndef __CARL9170_SHARED_WLAN_H
40 #define __CARL9170_SHARED_WLAN_H
41 
42 #include "fwcmd.h"
43 
44 #define	AR9170_RX_PHY_RATE_CCK_1M		0x0a
45 #define	AR9170_RX_PHY_RATE_CCK_2M		0x14
46 #define	AR9170_RX_PHY_RATE_CCK_5M		0x37
47 #define	AR9170_RX_PHY_RATE_CCK_11M		0x6e
48 
49 #define	AR9170_ENC_ALG_NONE			0x0
50 #define	AR9170_ENC_ALG_WEP64			0x1
51 #define	AR9170_ENC_ALG_TKIP			0x2
52 #define	AR9170_ENC_ALG_AESCCMP			0x4
53 #define	AR9170_ENC_ALG_WEP128			0x5
54 #define	AR9170_ENC_ALG_WEP256			0x6
55 #define	AR9170_ENC_ALG_CENC			0x7
56 
57 #define	AR9170_RX_ENC_SOFTWARE			0x8
58 
59 #define	AR9170_RX_STATUS_MODULATION		0x03
60 #define	AR9170_RX_STATUS_MODULATION_S		0
61 #define	AR9170_RX_STATUS_MODULATION_CCK		0x00
62 #define	AR9170_RX_STATUS_MODULATION_OFDM	0x01
63 #define	AR9170_RX_STATUS_MODULATION_HT		0x02
64 #define	AR9170_RX_STATUS_MODULATION_DUPOFDM	0x03
65 
66 /* depends on modulation */
67 #define	AR9170_RX_STATUS_SHORT_PREAMBLE		0x08
68 #define	AR9170_RX_STATUS_GREENFIELD		0x08
69 
70 #define	AR9170_RX_STATUS_MPDU			0x30
71 #define	AR9170_RX_STATUS_MPDU_S			4
72 #define	AR9170_RX_STATUS_MPDU_SINGLE		0x00
73 #define	AR9170_RX_STATUS_MPDU_FIRST		0x20
74 #define	AR9170_RX_STATUS_MPDU_MIDDLE		0x30
75 #define	AR9170_RX_STATUS_MPDU_LAST		0x10
76 
77 #define	AR9170_RX_STATUS_CONT_AGGR		0x40
78 #define	AR9170_RX_STATUS_TOTAL_ERROR		0x80
79 
80 #define	AR9170_RX_ERROR_RXTO			0x01
81 #define	AR9170_RX_ERROR_OVERRUN			0x02
82 #define	AR9170_RX_ERROR_DECRYPT			0x04
83 #define	AR9170_RX_ERROR_FCS			0x08
84 #define	AR9170_RX_ERROR_WRONG_RA		0x10
85 #define	AR9170_RX_ERROR_PLCP			0x20
86 #define	AR9170_RX_ERROR_MMIC			0x40
87 
88 /* these are either-or */
89 #define	AR9170_TX_MAC_PROT_RTS			0x0001
90 #define	AR9170_TX_MAC_PROT_CTS			0x0002
91 #define	AR9170_TX_MAC_PROT			0x0003
92 
93 #define	AR9170_TX_MAC_NO_ACK			0x0004
94 /* if unset, MAC will only do SIFS space before frame */
95 #define	AR9170_TX_MAC_BACKOFF			0x0008
96 #define	AR9170_TX_MAC_BURST			0x0010
97 #define	AR9170_TX_MAC_AGGR			0x0020
98 
99 /* encryption is a two-bit field */
100 #define	AR9170_TX_MAC_ENCR_NONE			0x0000
101 #define	AR9170_TX_MAC_ENCR_RC4			0x0040
102 #define	AR9170_TX_MAC_ENCR_CENC			0x0080
103 #define	AR9170_TX_MAC_ENCR_AES			0x00c0
104 
105 #define	AR9170_TX_MAC_MMIC			0x0100
106 #define	AR9170_TX_MAC_HW_DURATION		0x0200
107 #define	AR9170_TX_MAC_QOS_S			10
108 #define	AR9170_TX_MAC_QOS			0x0c00
109 #define	AR9170_TX_MAC_DISABLE_TXOP		0x1000
110 #define	AR9170_TX_MAC_TXOP_RIFS			0x2000
111 #define	AR9170_TX_MAC_IMM_BA			0x4000
112 
113 /* either-or */
114 #define	AR9170_TX_PHY_MOD_CCK			0x00000000
115 #define	AR9170_TX_PHY_MOD_OFDM			0x00000001
116 #define	AR9170_TX_PHY_MOD_HT			0x00000002
117 
118 /* depends on modulation */
119 #define	AR9170_TX_PHY_SHORT_PREAMBLE		0x00000004
120 #define	AR9170_TX_PHY_GREENFIELD		0x00000004
121 
122 #define	AR9170_TX_PHY_BW_S			3
123 #define	AR9170_TX_PHY_BW			(3 << AR9170_TX_PHY_BW_SHIFT)
124 #define	AR9170_TX_PHY_BW_20MHZ			0
125 #define	AR9170_TX_PHY_BW_40MHZ			2
126 #define	AR9170_TX_PHY_BW_40MHZ_DUP		3
127 
128 #define	AR9170_TX_PHY_TX_HEAVY_CLIP_S		6
129 #define	AR9170_TX_PHY_TX_HEAVY_CLIP		(7 << \
130 						 AR9170_TX_PHY_TX_HEAVY_CLIP_S)
131 
132 #define	AR9170_TX_PHY_TX_PWR_S			9
133 #define	AR9170_TX_PHY_TX_PWR			(0x3f << \
134 						 AR9170_TX_PHY_TX_PWR_S)
135 
136 #define	AR9170_TX_PHY_TXCHAIN_S			15
137 #define	AR9170_TX_PHY_TXCHAIN			(7 << \
138 						 AR9170_TX_PHY_TXCHAIN_S)
139 #define	AR9170_TX_PHY_TXCHAIN_1			1
140 /* use for cck, ofdm 6/9/12/18/24 and HT if capable */
141 #define	AR9170_TX_PHY_TXCHAIN_2			5
142 
143 #define	AR9170_TX_PHY_MCS_S			18
144 #define	AR9170_TX_PHY_MCS			(0x7f << \
145 						 AR9170_TX_PHY_MCS_S)
146 
147 #define	AR9170_TX_PHY_RATE_CCK_1M		0x0
148 #define	AR9170_TX_PHY_RATE_CCK_2M		0x1
149 #define	AR9170_TX_PHY_RATE_CCK_5M		0x2
150 #define	AR9170_TX_PHY_RATE_CCK_11M		0x3
151 
152 /* same as AR9170_RX_PHY_RATE */
153 #define	AR9170_TXRX_PHY_RATE_OFDM_6M		0xb
154 #define	AR9170_TXRX_PHY_RATE_OFDM_9M		0xf
155 #define	AR9170_TXRX_PHY_RATE_OFDM_12M		0xa
156 #define	AR9170_TXRX_PHY_RATE_OFDM_18M		0xe
157 #define	AR9170_TXRX_PHY_RATE_OFDM_24M		0x9
158 #define	AR9170_TXRX_PHY_RATE_OFDM_36M		0xd
159 #define	AR9170_TXRX_PHY_RATE_OFDM_48M		0x8
160 #define	AR9170_TXRX_PHY_RATE_OFDM_54M		0xc
161 
162 #define	AR9170_TXRX_PHY_RATE_HT_MCS0		0x0
163 #define	AR9170_TXRX_PHY_RATE_HT_MCS1		0x1
164 #define	AR9170_TXRX_PHY_RATE_HT_MCS2		0x2
165 #define	AR9170_TXRX_PHY_RATE_HT_MCS3		0x3
166 #define	AR9170_TXRX_PHY_RATE_HT_MCS4		0x4
167 #define	AR9170_TXRX_PHY_RATE_HT_MCS5		0x5
168 #define	AR9170_TXRX_PHY_RATE_HT_MCS6		0x6
169 #define	AR9170_TXRX_PHY_RATE_HT_MCS7		0x7
170 #define	AR9170_TXRX_PHY_RATE_HT_MCS8		0x8
171 #define	AR9170_TXRX_PHY_RATE_HT_MCS9		0x9
172 #define	AR9170_TXRX_PHY_RATE_HT_MCS10		0xa
173 #define	AR9170_TXRX_PHY_RATE_HT_MCS11		0xb
174 #define	AR9170_TXRX_PHY_RATE_HT_MCS12		0xc
175 #define	AR9170_TXRX_PHY_RATE_HT_MCS13		0xd
176 #define	AR9170_TXRX_PHY_RATE_HT_MCS14		0xe
177 #define	AR9170_TXRX_PHY_RATE_HT_MCS15		0xf
178 
179 #define	AR9170_TX_PHY_SHORT_GI			0x80000000
180 
181 #ifdef __CARL9170FW__
182 struct ar9170_tx_hw_mac_control {
183 	union {
184 		struct {
185 			/*
186 			 * Beware of compiler bugs in all gcc pre 4.4!
187 			 */
188 
189 			u8 erp_prot:2;
190 			u8 no_ack:1;
191 			u8 backoff:1;
192 			u8 burst:1;
193 			u8 ampdu:1;
194 
195 			u8 enc_mode:2;
196 
197 			u8 hw_mmic:1;
198 			u8 hw_duration:1;
199 
200 			u8 qos_queue:2;
201 
202 			u8 disable_txop:1;
203 			u8 txop_rifs:1;
204 
205 			u8 ba_end:1;
206 			u8 probe:1;
207 		} __packed;
208 
209 		__le16 set;
210 	} __packed;
211 } __packed;
212 
213 struct ar9170_tx_hw_phy_control {
214 	union {
215 		struct {
216 			/*
217 			 * Beware of compiler bugs in all gcc pre 4.4!
218 			 */
219 
220 			u8 modulation:2;
221 			u8 preamble:1;
222 			u8 bandwidth:2;
223 			u8:1;
224 			u8 heavy_clip:3;
225 			u8 tx_power:6;
226 			u8 chains:3;
227 			u8 mcs:7;
228 			u8:6;
229 			u8 short_gi:1;
230 		} __packed;
231 
232 		__le32 set;
233 	} __packed;
234 } __packed;
235 
236 struct ar9170_tx_rate_info {
237 	u8 tries:3;
238 	u8 erp_prot:2;
239 	u8 ampdu:1;
240 	u8 free:2; /* free for use (e.g.:RIFS/TXOP/AMPDU) */
241 } __packed;
242 
243 struct carl9170_tx_superdesc {
244 	__le16 len;
245 	u8 rix;
246 	u8 cnt;
247 	u8 cookie;
248 	u8 ampdu_density:3;
249 	u8 ampdu_factor:2;
250 	u8 ampdu_commit_density:1;
251 	u8 ampdu_commit_factor:1;
252 	u8 ampdu_unused_bit:1;
253 	u8 queue:2;
254 	u8 assign_seq:1;
255 	u8 vif_id:3;
256 	u8 fill_in_tsf:1;
257 	u8 cab:1;
258 	u8 padding2;
259 	struct ar9170_tx_rate_info ri[CARL9170_TX_MAX_RATES];
260 	struct ar9170_tx_hw_phy_control rr[CARL9170_TX_MAX_RETRY_RATES];
261 } __packed;
262 
263 struct ar9170_tx_hwdesc {
264 	__le16 length;
265 	struct ar9170_tx_hw_mac_control mac;
266 	struct ar9170_tx_hw_phy_control phy;
267 } __packed;
268 
269 struct ar9170_tx_frame {
270 	struct ar9170_tx_hwdesc hdr;
271 
272 	union {
273 		struct ieee80211_hdr i3e;
274 		DECLARE_FLEX_ARRAY(u8, payload);
275 	} data;
276 } __packed;
277 
278 struct carl9170_tx_superframe {
279 	struct carl9170_tx_superdesc s;
280 	struct ar9170_tx_frame f;
281 } __packed __aligned(4);
282 
283 #endif /* __CARL9170FW__ */
284 
285 struct _ar9170_tx_hwdesc {
286 	__le16 length;
287 	__le16 mac_control;
288 	__le32 phy_control;
289 } __packed;
290 
291 #define	CARL9170_TX_SUPER_AMPDU_DENSITY_S		0
292 #define	CARL9170_TX_SUPER_AMPDU_DENSITY			0x7
293 #define	CARL9170_TX_SUPER_AMPDU_FACTOR			0x18
294 #define	CARL9170_TX_SUPER_AMPDU_FACTOR_S		3
295 #define	CARL9170_TX_SUPER_AMPDU_COMMIT_DENSITY		0x20
296 #define	CARL9170_TX_SUPER_AMPDU_COMMIT_DENSITY_S	5
297 #define	CARL9170_TX_SUPER_AMPDU_COMMIT_FACTOR		0x40
298 #define	CARL9170_TX_SUPER_AMPDU_COMMIT_FACTOR_S		6
299 
300 #define CARL9170_TX_SUPER_MISC_QUEUE			0x3
301 #define CARL9170_TX_SUPER_MISC_QUEUE_S			0
302 #define CARL9170_TX_SUPER_MISC_ASSIGN_SEQ		0x4
303 #define	CARL9170_TX_SUPER_MISC_VIF_ID			0x38
304 #define	CARL9170_TX_SUPER_MISC_VIF_ID_S			3
305 #define	CARL9170_TX_SUPER_MISC_FILL_IN_TSF		0x40
306 #define	CARL9170_TX_SUPER_MISC_CAB			0x80
307 
308 #define CARL9170_TX_SUPER_RI_TRIES			0x7
309 #define CARL9170_TX_SUPER_RI_TRIES_S			0
310 #define CARL9170_TX_SUPER_RI_ERP_PROT			0x18
311 #define CARL9170_TX_SUPER_RI_ERP_PROT_S			3
312 #define CARL9170_TX_SUPER_RI_AMPDU			0x20
313 #define CARL9170_TX_SUPER_RI_AMPDU_S			5
314 
315 struct _carl9170_tx_superdesc {
316 	__le16 len;
317 	u8 rix;
318 	u8 cnt;
319 	u8 cookie;
320 	u8 ampdu_settings;
321 	u8 misc;
322 	u8 padding;
323 	u8 ri[CARL9170_TX_MAX_RATES];
324 	__le32 rr[CARL9170_TX_MAX_RETRY_RATES];
325 } __packed;
326 
327 struct _carl9170_tx_superframe {
328 	struct _carl9170_tx_superdesc s;
329 	struct _ar9170_tx_hwdesc f;
330 	u8 frame_data[];
331 } __packed __aligned(4);
332 
333 #define	CARL9170_TX_SUPERDESC_LEN		24
334 #define	AR9170_TX_HWDESC_LEN			8
335 #define	CARL9170_TX_SUPERFRAME_LEN		(CARL9170_TX_SUPERDESC_LEN + \
336 						 AR9170_TX_HWDESC_LEN)
337 
338 struct ar9170_rx_head {
339 	u8 plcp[12];
340 } __packed;
341 
342 #define	AR9170_RX_HEAD_LEN			12
343 
344 struct ar9170_rx_phystatus {
345 	union {
346 		struct {
347 			u8 rssi_ant0, rssi_ant1, rssi_ant2,
348 				rssi_ant0x, rssi_ant1x, rssi_ant2x,
349 				rssi_combined;
350 		} __packed;
351 		u8 rssi[7];
352 	} __packed;
353 
354 	u8 evm_stream0[6], evm_stream1[6];
355 	u8 phy_err;
356 } __packed;
357 
358 #define	AR9170_RX_PHYSTATUS_LEN			20
359 
360 struct ar9170_rx_macstatus {
361 	u8 SAidx, DAidx;
362 	u8 error;
363 	u8 status;
364 } __packed;
365 
366 #define	AR9170_RX_MACSTATUS_LEN			4
367 
368 struct ar9170_rx_frame_single {
369 	struct ar9170_rx_head phy_head;
370 	struct ieee80211_hdr i3e __packed __aligned(2);
371 	struct ar9170_rx_phystatus phy_tail;
372 	struct ar9170_rx_macstatus macstatus;
373 };
374 
375 struct ar9170_rx_frame_head {
376 	struct ar9170_rx_head phy_head;
377 	struct ieee80211_hdr i3e __packed __aligned(2);
378 	struct ar9170_rx_macstatus macstatus;
379 };
380 
381 struct ar9170_rx_frame_middle {
382 	struct ieee80211_hdr i3e __packed __aligned(2);
383 	struct ar9170_rx_macstatus macstatus;
384 };
385 
386 struct ar9170_rx_frame_tail {
387 	struct ieee80211_hdr i3e __packed __aligned(2);
388 	struct ar9170_rx_phystatus phy_tail;
389 	struct ar9170_rx_macstatus macstatus;
390 };
391 
392 struct ar9170_rx_frame {
393 	union {
394 		struct ar9170_rx_frame_single single;
395 		struct ar9170_rx_frame_head head;
396 		struct ar9170_rx_frame_middle middle;
397 		struct ar9170_rx_frame_tail tail;
398 	};
399 };
400 
ar9170_get_decrypt_type(struct ar9170_rx_macstatus * t)401 static inline u8 ar9170_get_decrypt_type(struct ar9170_rx_macstatus *t)
402 {
403 	return (t->SAidx & 0xc0) >> 4 |
404 	       (t->DAidx & 0xc0) >> 6;
405 }
406 
407 /*
408  * This is an workaround for several undocumented bugs.
409  * Don't mess with the QoS/AC <-> HW Queue map, if you don't
410  * know what you are doing.
411  *
412  * Known problems [hardware]:
413  *  * The MAC does not aggregate frames on anything other
414  *    than the first HW queue.
415  *  * when an AMPDU is placed [in the first hw queue] and
416  *    additional frames are already queued on a different
417  *    hw queue, the MAC will ALWAYS freeze.
418  *
419  * In a nutshell: The hardware can either do QoS or
420  * Aggregation but not both at the same time. As a
421  * result, this makes the device pretty much useless
422  * for any serious 802.11n setup.
423  */
424 enum ar9170_txq {
425 	AR9170_TXQ_BK = 0,	/* TXQ0 */
426 	AR9170_TXQ_BE,		/* TXQ1	*/
427 	AR9170_TXQ_VI,		/* TXQ2	*/
428 	AR9170_TXQ_VO,		/* TXQ3 */
429 
430 	__AR9170_NUM_TXQ,
431 };
432 
433 #define	AR9170_TXQ_DEPTH			32
434 
435 #endif /* __CARL9170_SHARED_WLAN_H */
436