1 /*
2 * Copyright (c) 2013 Qualcomm Atheros, Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
9 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
10 * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
11 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
12 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
13 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
14 * PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #include "opt_ah.h"
18
19 #include "ah.h"
20 #include "ah_desc.h"
21 #include "ah_internal.h"
22
23 #include "ar9300/ar9300.h"
24 #include "ar9300/ar9300reg.h"
25 #include "ar9300/ar9300desc.h"
26
27
28 /*
29 * Process an RX descriptor, and return the status to the caller.
30 * Copy some hardware specific items into the software portion
31 * of the descriptor.
32 *
33 * NB: the caller is responsible for validating the memory contents
34 * of the descriptor (e.g. flushing any cached copy).
35 */
36 HAL_STATUS
ar9300_proc_rx_desc_fast(struct ath_hal * ah,struct ath_desc * ds,u_int32_t pa,struct ath_desc * nds,struct ath_rx_status * rxs,void * buf_addr)37 ar9300_proc_rx_desc_fast(struct ath_hal *ah, struct ath_desc *ds,
38 u_int32_t pa, struct ath_desc *nds, struct ath_rx_status *rxs,
39 void *buf_addr)
40 {
41 struct ar9300_rxs *rxsp = AR9300RXS(buf_addr);
42
43 /*
44 ath_hal_printf(ah,"CHH=RX: ds_info 0x%x status1: 0x%x status11: 0x%x\n",
45 rxsp->ds_info,rxsp->status1,rxsp->status11);
46 */
47
48 if ((rxsp->status11 & AR_rx_done) == 0) {
49 return HAL_EINPROGRESS;
50 }
51
52 if (MS(rxsp->ds_info, AR_desc_id) != 0x168c) {
53 #if __PKT_SERIOUS_ERRORS__
54 /*BUG: 63564-HT */
55 HALDEBUG(AH_NULL, HAL_DEBUG_UNMASKABLE, "%s: Rx Descriptor error 0x%x\n",
56 __func__, rxsp->ds_info);
57 #endif
58 return HAL_EINVAL;
59 }
60
61 if ((rxsp->ds_info & (AR_tx_rx_desc | AR_ctrl_stat)) != 0) {
62 #if __PKT_SERIOUS_ERRORS__
63 HALDEBUG(AH_NULL, HAL_DEBUG_UNMASKABLE,
64 "%s: Rx Descriptor wrong info 0x%x\n", __func__, rxsp->ds_info);
65 #endif
66 return HAL_EINPROGRESS;
67 }
68
69 rxs->rs_status = 0;
70 rxs->rs_flags = 0;
71 rxs->rs_phyerr = 0;
72
73 rxs->rs_datalen = rxsp->status2 & AR_data_len;
74 rxs->rs_tstamp = rxsp->status3;
75
76 /* XXX what about key_cache_miss? */
77 rxs->rs_rssi = MS(rxsp->status5, AR_rx_rssi_combined);
78 rxs->rs_rssi_ctl[0] = MS(rxsp->status1, AR_rx_rssi_ant00);
79 rxs->rs_rssi_ctl[1] = MS(rxsp->status1, AR_rx_rssi_ant01);
80 rxs->rs_rssi_ctl[2] = MS(rxsp->status1, AR_rx_rssi_ant02);
81 rxs->rs_rssi_ext[0] = MS(rxsp->status5, AR_rx_rssi_ant10);
82 rxs->rs_rssi_ext[1] = MS(rxsp->status5, AR_rx_rssi_ant11);
83 rxs->rs_rssi_ext[2] = MS(rxsp->status5, AR_rx_rssi_ant12);
84 if (rxsp->status11 & AR_rx_key_idx_valid) {
85 rxs->rs_keyix = MS(rxsp->status11, AR_key_idx);
86 } else {
87 rxs->rs_keyix = HAL_RXKEYIX_INVALID;
88 }
89 /* NB: caller expected to do rate table mapping */
90 rxs->rs_rate = MS(rxsp->status1, AR_rx_rate);
91 rxs->rs_more = (rxsp->status2 & AR_rx_more) ? 1 : 0;
92
93 rxs->rs_isaggr = (rxsp->status11 & AR_rx_aggr) ? 1 : 0;
94 rxs->rs_moreaggr = (rxsp->status11 & AR_rx_more_aggr) ? 1 : 0;
95 rxs->rs_antenna = (MS(rxsp->status4, AR_rx_antenna) & 0x7);
96 rxs->rs_flags = (rxsp->status11 & AR_apsd_trig) ? HAL_RX_IS_APSD : 0;
97 rxs->rs_flags |= (rxsp->status4 & AR_gi) ? HAL_RX_GI : 0;
98 rxs->rs_flags |= (rxsp->status4 & AR_2040) ? HAL_RX_2040 : 0;
99
100 /* Copy EVM information */
101 rxs->rs_evm0 = rxsp->status6;
102 rxs->rs_evm1 = rxsp->status7;
103 rxs->rs_evm2 = rxsp->status8;
104 rxs->rs_evm3 = rxsp->status9;
105 rxs->rs_evm4 = (rxsp->status10 & 0xffff);
106
107 if (rxsp->status11 & AR_pre_delim_crc_err) {
108 rxs->rs_flags |= HAL_RX_DELIM_CRC_PRE;
109 }
110 if (rxsp->status11 & AR_post_delim_crc_err) {
111 rxs->rs_flags |= HAL_RX_DELIM_CRC_POST;
112 }
113 if (rxsp->status11 & AR_decrypt_busy_err) {
114 rxs->rs_flags |= HAL_RX_DECRYPT_BUSY;
115 }
116 if (rxsp->status11 & AR_hi_rx_chain) {
117 rxs->rs_flags |= HAL_RX_HI_RX_CHAIN;
118 }
119 if (rxsp->status11 & AR_key_miss) {
120 rxs->rs_status |= HAL_RXERR_KEYMISS;
121 }
122
123 if ((rxsp->status11 & AR_rx_frame_ok) == 0) {
124 /*
125 * These four bits should not be set together. The
126 * 9300 spec states a Michael error can only occur if
127 * decrypt_crc_err not set (and TKIP is used). Experience
128 * indicates however that you can also get Michael errors
129 * when a CRC error is detected, but these are specious.
130 * Consequently we filter them out here so we don't
131 * confuse and/or complicate drivers.
132 */
133
134 if (rxsp->status11 & AR_crc_err) {
135 rxs->rs_status |= HAL_RXERR_CRC;
136 /*
137 * ignore CRC flag for phy reports
138 */
139 if (rxsp->status11 & AR_phyerr) {
140 u_int phyerr = MS(rxsp->status11, AR_phy_err_code);
141 rxs->rs_status |= HAL_RXERR_PHY;
142 rxs->rs_phyerr = phyerr;
143 }
144 } else if (rxsp->status11 & AR_phyerr) {
145 u_int phyerr;
146
147 /*
148 * Packets with OFDM_RESTART on post delimiter are CRC OK and
149 * usable and MAC ACKs them.
150 * To avoid packet from being lost, we remove the PHY Err flag
151 * so that lmac layer does not drop them.
152 * (EV 70071)
153 */
154 phyerr = MS(rxsp->status11, AR_phy_err_code);
155 if ((phyerr == HAL_PHYERR_OFDM_RESTART) &&
156 (rxsp->status11 & AR_post_delim_crc_err)) {
157 rxs->rs_phyerr = 0;
158 } else {
159 rxs->rs_status |= HAL_RXERR_PHY;
160 rxs->rs_phyerr = phyerr;
161 }
162 } else if (rxsp->status11 & AR_decrypt_crc_err) {
163 rxs->rs_status |= HAL_RXERR_DECRYPT;
164 } else if (rxsp->status11 & AR_michael_err) {
165 rxs->rs_status |= HAL_RXERR_MIC;
166 }
167 }
168 #if 0
169 rxs->rs_channel = AH_PRIVATE(ah)->ah_curchan->channel;
170 #endif
171 return HAL_OK;
172 }
173
174 HAL_STATUS
ar9300_proc_rx_desc(struct ath_hal * ah,struct ath_desc * ds,u_int32_t pa,struct ath_desc * nds,u_int64_t tsf,struct ath_rx_status * rxs)175 ar9300_proc_rx_desc(struct ath_hal *ah, struct ath_desc *ds,
176 u_int32_t pa, struct ath_desc *nds, u_int64_t tsf,
177 struct ath_rx_status *rxs)
178 {
179 return HAL_ENOTSUPP;
180 }
181
182 /*
183 * rx path in ISR is different for ar9300 from ar5416, and
184 * ath_rx_proc_descfast will not be called if edmasupport is true.
185 * So this function ath_hal_get_rxkeyidx will not be
186 * called for ar9300.
187 * This function in ar9300's HAL is just a stub one because we need
188 * to link something to the callback interface of the HAL module.
189 */
190 HAL_STATUS
ar9300_get_rx_key_idx(struct ath_hal * ah,struct ath_desc * ds,u_int8_t * keyix,u_int8_t * status)191 ar9300_get_rx_key_idx(struct ath_hal *ah, struct ath_desc *ds, u_int8_t *keyix,
192 u_int8_t *status)
193 {
194 *status = 0;
195 *keyix = HAL_RXKEYIX_INVALID;
196 return HAL_ENOTSUPP;
197 }
198