1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * This file is part of wl1271
4  *
5  * Copyright (C) 1998-2009 Texas Instruments. All rights reserved.
6  * Copyright (C) 2009 Nokia Corporation
7  *
8  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
9  */
10 
11 #ifndef __TX_H__
12 #define __TX_H__
13 
14 #define TX_HW_MGMT_PKT_LIFETIME_TU       2000
15 #define TX_HW_AP_MODE_PKT_LIFETIME_TU    8000
16 
17 #define TX_HW_ATTR_SAVE_RETRIES          BIT(0)
18 #define TX_HW_ATTR_HEADER_PAD            BIT(1)
19 #define TX_HW_ATTR_SESSION_COUNTER       (BIT(2) | BIT(3) | BIT(4))
20 #define TX_HW_ATTR_RATE_POLICY           (BIT(5) | BIT(6) | BIT(7) | \
21 					  BIT(8) | BIT(9))
22 #define TX_HW_ATTR_LAST_WORD_PAD         (BIT(10) | BIT(11))
23 #define TX_HW_ATTR_TX_CMPLT_REQ          BIT(12)
24 #define TX_HW_ATTR_TX_DUMMY_REQ          BIT(13)
25 #define TX_HW_ATTR_HOST_ENCRYPT          BIT(14)
26 #define TX_HW_ATTR_EAPOL_FRAME           BIT(15)
27 
28 #define TX_HW_ATTR_OFST_SAVE_RETRIES     0
29 #define TX_HW_ATTR_OFST_HEADER_PAD       1
30 #define TX_HW_ATTR_OFST_SESSION_COUNTER  2
31 #define TX_HW_ATTR_OFST_RATE_POLICY      5
32 #define TX_HW_ATTR_OFST_LAST_WORD_PAD    10
33 #define TX_HW_ATTR_OFST_TX_CMPLT_REQ     12
34 
35 #define TX_HW_RESULT_QUEUE_LEN           16
36 #define TX_HW_RESULT_QUEUE_LEN_MASK      0xf
37 
38 #define WL1271_TX_ALIGN_TO 4
39 #define WL1271_EXTRA_SPACE_TKIP 4
40 #define WL1271_EXTRA_SPACE_AES  8
41 #define WL1271_EXTRA_SPACE_MAX  8
42 
43 /* Used for management frames and dummy packets */
44 #define WL1271_TID_MGMT 7
45 
46 /* stop a ROC for pending authentication reply after this time (ms) */
47 #define WLCORE_PEND_AUTH_ROC_TIMEOUT     1000
48 
49 struct wl127x_tx_mem {
50 	/*
51 	 * Number of extra memory blocks to allocate for this packet
52 	 * in addition to the number of blocks derived from the packet
53 	 * length.
54 	 */
55 	u8 extra_blocks;
56 	/*
57 	 * Total number of memory blocks allocated by the host for
58 	 * this packet. Must be equal or greater than the actual
59 	 * blocks number allocated by HW.
60 	 */
61 	u8 total_mem_blocks;
62 } __packed;
63 
64 struct wl128x_tx_mem {
65 	/*
66 	 * Total number of memory blocks allocated by the host for
67 	 * this packet.
68 	 */
69 	u8 total_mem_blocks;
70 	/*
71 	 * Number of extra bytes, at the end of the frame. the host
72 	 * uses this padding to complete each frame to integer number
73 	 * of SDIO blocks.
74 	 */
75 	u8 extra_bytes;
76 } __packed;
77 
78 struct wl18xx_tx_mem {
79 	/*
80 	 * Total number of memory blocks allocated by the host for
81 	 * this packet.
82 	 */
83 	u8 total_mem_blocks;
84 
85 	/*
86 	 * control bits
87 	 */
88 	u8 ctrl;
89 } __packed;
90 
91 /*
92  * On wl128x based devices, when TX packets are aggregated, each packet
93  * size must be aligned to the SDIO block size. The maximum block size
94  * is bounded by the type of the padded bytes field that is sent to the
95  * FW. Currently the type is u8, so the maximum block size is 256 bytes.
96  */
97 #define WL12XX_BUS_BLOCK_SIZE min(512u,	\
98 	    (1u << (8 * sizeof(((struct wl128x_tx_mem *) 0)->extra_bytes))))
99 
100 struct wl1271_tx_hw_descr {
101 	/* Length of packet in words, including descriptor+header+data */
102 	__le16 length;
103 	union {
104 		struct wl127x_tx_mem wl127x_mem;
105 		struct wl128x_tx_mem wl128x_mem;
106 		struct wl18xx_tx_mem wl18xx_mem;
107 	} __packed;
108 	/* Device time (in us) when the packet arrived to the driver */
109 	__le32 start_time;
110 	/*
111 	 * Max delay in TUs until transmission. The last device time the
112 	 * packet can be transmitted is: start_time + (1024 * life_time)
113 	 */
114 	__le16 life_time;
115 	/* Bitwise fields - see TX_ATTR... definitions above. */
116 	__le16 tx_attr;
117 	/* Packet identifier used also in the Tx-Result. */
118 	u8 id;
119 	/* The packet TID value (as User-Priority) */
120 	u8 tid;
121 	/* host link ID (HLID) */
122 	u8 hlid;
123 
124 	union {
125 		u8 wl12xx_reserved;
126 
127 		/*
128 		 * bit 0   -> 0 = udp, 1 = tcp
129 		 * bit 1:7 -> IP header offset
130 		 */
131 		u8 wl18xx_checksum_data;
132 	} __packed;
133 } __packed;
134 
135 enum wl1271_tx_hw_res_status {
136 	TX_SUCCESS          = 0,
137 	TX_HW_ERROR         = 1,
138 	TX_DISABLED         = 2,
139 	TX_RETRY_EXCEEDED   = 3,
140 	TX_TIMEOUT          = 4,
141 	TX_KEY_NOT_FOUND    = 5,
142 	TX_PEER_NOT_FOUND   = 6,
143 	TX_SESSION_MISMATCH = 7,
144 	TX_LINK_NOT_VALID   = 8,
145 };
146 
147 struct wl1271_tx_hw_res_descr {
148 	/* Packet Identifier - same value used in the Tx descriptor.*/
149 	u8 id;
150 	/* The status of the transmission, indicating success or one of
151 	   several possible reasons for failure. */
152 	u8 status;
153 	/* Total air access duration including all retrys and overheads.*/
154 	__le16 medium_usage;
155 	/* The time passed from host xfer to Tx-complete.*/
156 	__le32 fw_handling_time;
157 	/* Total media delay
158 	   (from 1st EDCA AIFS counter until TX Complete). */
159 	__le32 medium_delay;
160 	/* LS-byte of last TKIP seq-num (saved per AC for recovery). */
161 	u8 tx_security_sequence_number_lsb;
162 	/* Retry count - number of transmissions without successful ACK.*/
163 	u8 ack_failures;
164 	/* The rate that succeeded getting ACK
165 	   (Valid only if status=SUCCESS). */
166 	u8 rate_class_index;
167 	/* for 4-byte alignment. */
168 	u8 spare;
169 } __packed;
170 
171 struct wl1271_tx_hw_res_if {
172 	__le32 tx_result_fw_counter;
173 	__le32 tx_result_host_counter;
174 	struct wl1271_tx_hw_res_descr tx_results_queue[TX_HW_RESULT_QUEUE_LEN];
175 } __packed;
176 
177 enum wlcore_queue_stop_reason {
178 	WLCORE_QUEUE_STOP_REASON_WATERMARK,
179 	WLCORE_QUEUE_STOP_REASON_FW_RESTART,
180 	WLCORE_QUEUE_STOP_REASON_FLUSH,
181 	WLCORE_QUEUE_STOP_REASON_SPARE_BLK, /* 18xx specific */
182 };
183 
wl1271_tx_get_queue(int queue)184 static inline int wl1271_tx_get_queue(int queue)
185 {
186 	switch (queue) {
187 	case 0:
188 		return CONF_TX_AC_VO;
189 	case 1:
190 		return CONF_TX_AC_VI;
191 	case 2:
192 		return CONF_TX_AC_BE;
193 	case 3:
194 		return CONF_TX_AC_BK;
195 	default:
196 		return CONF_TX_AC_BE;
197 	}
198 }
199 
200 static inline
wlcore_tx_get_mac80211_queue(struct wl12xx_vif * wlvif,int queue)201 int wlcore_tx_get_mac80211_queue(struct wl12xx_vif *wlvif, int queue)
202 {
203 	int mac_queue = wlvif->hw_queue_base;
204 
205 	switch (queue) {
206 	case CONF_TX_AC_VO:
207 		return mac_queue + 0;
208 	case CONF_TX_AC_VI:
209 		return mac_queue + 1;
210 	case CONF_TX_AC_BE:
211 		return mac_queue + 2;
212 	case CONF_TX_AC_BK:
213 		return mac_queue + 3;
214 	default:
215 		return mac_queue + 2;
216 	}
217 }
218 
wl1271_tx_total_queue_count(struct wl1271 * wl)219 static inline int wl1271_tx_total_queue_count(struct wl1271 *wl)
220 {
221 	int i, count = 0;
222 
223 	for (i = 0; i < NUM_TX_QUEUES; i++)
224 		count += wl->tx_queue_count[i];
225 
226 	return count;
227 }
228 
229 void wl1271_tx_work(struct work_struct *work);
230 int wlcore_tx_work_locked(struct wl1271 *wl);
231 int wlcore_tx_complete(struct wl1271 *wl);
232 void wl12xx_tx_reset_wlvif(struct wl1271 *wl, struct wl12xx_vif *wlvif);
233 void wl12xx_tx_reset(struct wl1271 *wl);
234 void wl1271_tx_flush(struct wl1271 *wl);
235 u8 wlcore_rate_to_idx(struct wl1271 *wl, u8 rate, enum nl80211_band band);
236 u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set,
237 				enum nl80211_band rate_band);
238 u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set);
239 u8 wl12xx_tx_get_hlid(struct wl1271 *wl, struct wl12xx_vif *wlvif,
240 		      struct sk_buff *skb, struct ieee80211_sta *sta);
241 void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid);
242 void wl1271_handle_tx_low_watermark(struct wl1271 *wl);
243 bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb);
244 void wl12xx_rearm_rx_streaming(struct wl1271 *wl, unsigned long *active_hlids);
245 unsigned int wlcore_calc_packet_alignment(struct wl1271 *wl,
246 					  unsigned int packet_length);
247 void wl1271_free_tx_id(struct wl1271 *wl, int id);
248 void wlcore_stop_queue_locked(struct wl1271 *wl, struct wl12xx_vif *wlvif,
249 			      u8 queue, enum wlcore_queue_stop_reason reason);
250 void wlcore_stop_queue(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 queue,
251 		       enum wlcore_queue_stop_reason reason);
252 void wlcore_wake_queue(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 queue,
253 		       enum wlcore_queue_stop_reason reason);
254 void wlcore_stop_queues(struct wl1271 *wl,
255 			enum wlcore_queue_stop_reason reason);
256 void wlcore_wake_queues(struct wl1271 *wl,
257 			enum wlcore_queue_stop_reason reason);
258 bool wlcore_is_queue_stopped_by_reason(struct wl1271 *wl,
259 				       struct wl12xx_vif *wlvif, u8 queue,
260 				       enum wlcore_queue_stop_reason reason);
261 bool
262 wlcore_is_queue_stopped_by_reason_locked(struct wl1271 *wl,
263 					 struct wl12xx_vif *wlvif,
264 					 u8 queue,
265 					 enum wlcore_queue_stop_reason reason);
266 bool wlcore_is_queue_stopped_locked(struct wl1271 *wl, struct wl12xx_vif *wlvif,
267 				    u8 queue);
268 
269 /* from main.c */
270 void wl1271_free_sta(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 hlid);
271 void wl12xx_rearm_tx_watchdog_locked(struct wl1271 *wl);
272 
273 #endif
274