1 /*
2  * Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
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
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #ifndef _DXE_H_
18 #define _DXE_H_
19 
20 #include "wcn36xx.h"
21 
22 /*
23 TX_LOW	= DMA0
24 TX_HIGH	= DMA4
25 RX_LOW	= DMA1
26 RX_HIGH	= DMA3
27 H2H_TEST_RX_TX = DMA2
28 */
29 
30 /* DXE registers */
31 #define WCN36XX_DXE_MEM_REG			0
32 
33 #define WCN36XX_CCU_DXE_INT_SELECT_RIVA		0x310
34 #define WCN36XX_CCU_DXE_INT_SELECT_PRONTO	0x10dc
35 
36 /* Descriptor valid */
37 #define WCN36xx_DXE_CTRL_VLD		BIT(0)
38 /* End of packet */
39 #define WCN36xx_DXE_CTRL_EOP		BIT(3)
40 /* BD handling bit */
41 #define WCN36xx_DXE_CTRL_BDH		BIT(4)
42 /* Source is a queue */
43 #define WCN36xx_DXE_CTRL_SIQ		BIT(5)
44 /* Destination is a queue */
45 #define WCN36xx_DXE_CTRL_DIQ		BIT(6)
46 /* Pointer address is a queue */
47 #define WCN36xx_DXE_CTRL_PIQ		BIT(7)
48 /* Release PDU when done */
49 #define WCN36xx_DXE_CTRL_PDU_REL	BIT(8)
50 /* STOP channel processing */
51 #define WCN36xx_DXE_CTRL_STOP		BIT(16)
52 /* INT on descriptor done */
53 #define WCN36xx_DXE_CTRL_INT		BIT(17)
54 /* Endian byte swap enable */
55 #define WCN36xx_DXE_CTRL_SWAP		BIT(20)
56 /* Master endianness */
57 #define WCN36xx_DXE_CTRL_ENDIANNESS	BIT(21)
58 
59 /* Transfer type */
60 #define WCN36xx_DXE_CTRL_XTYPE_SHIFT 1
61 #define WCN36xx_DXE_CTRL_XTYPE_MASK GENMASK(2, WCN36xx_DXE_CTRL_XTYPE_SHIFT)
62 #define WCN36xx_DXE_CTRL_XTYPE_SET(x)	((x) << WCN36xx_DXE_CTRL_XTYPE_SHIFT)
63 
64 /* BMU Threshold select */
65 #define WCN36xx_DXE_CTRL_BTHLD_SEL_SHIFT 9
66 #define WCN36xx_DXE_CTRL_BTHLD_SEL_MASK GENMASK(12, WCN36xx_DXE_CTRL_BTHLD_SEL_SHIFT)
67 #define WCN36xx_DXE_CTRL_BTHLD_SEL_SET(x) ((x) << WCN36xx_DXE_CTRL_BTHLD_SEL_SHIFT)
68 
69 /* Priority */
70 #define WCN36xx_DXE_CTRL_PRIO_SHIFT 13
71 #define WCN36xx_DXE_CTRL_PRIO_MASK GENMASK(15, WCN36xx_DXE_CTRL_PRIO_SHIFT)
72 #define WCN36xx_DXE_CTRL_PRIO_SET(x) ((x) << WCN36xx_DXE_CTRL_PRIO_SHIFT)
73 
74 /* BD Template index */
75 #define WCN36xx_DXE_CTRL_BDT_IDX_SHIFT 18
76 #define WCN36xx_DXE_CTRL_BDT_IDX_MASK GENMASK(19, WCN36xx_DXE_CTRL_BDT_IDX_SHIFT)
77 #define WCN36xx_DXE_CTRL_BDT_IDX_SET(x) ((x) << WCN36xx_DXE_CTRL_BDT_IDX_SHIFT)
78 
79 /* Transfer types: */
80 /* Host to host */
81 #define WCN36xx_DXE_XTYPE_H2H (0)
82 /* Host to BMU */
83 #define WCN36xx_DXE_XTYPE_H2B (2)
84 /* BMU to host */
85 #define WCN36xx_DXE_XTYPE_B2H (3)
86 
87 #define WCN36XX_DXE_CTRL_TX_L	(WCN36xx_DXE_CTRL_XTYPE_SET(WCN36xx_DXE_XTYPE_H2B) | \
88 	WCN36xx_DXE_CTRL_DIQ | WCN36xx_DXE_CTRL_BTHLD_SEL_SET(5) | \
89 	WCN36xx_DXE_CTRL_PRIO_SET(4) | WCN36xx_DXE_CTRL_INT | \
90 	WCN36xx_DXE_CTRL_SWAP | WCN36xx_DXE_CTRL_ENDIANNESS)
91 
92 #define WCN36XX_DXE_CTRL_TX_H	 (WCN36xx_DXE_CTRL_XTYPE_SET(WCN36xx_DXE_XTYPE_H2B) | \
93 	WCN36xx_DXE_CTRL_DIQ | WCN36xx_DXE_CTRL_BTHLD_SEL_SET(7) | \
94 	WCN36xx_DXE_CTRL_PRIO_SET(6) | WCN36xx_DXE_CTRL_INT | \
95 	WCN36xx_DXE_CTRL_SWAP | WCN36xx_DXE_CTRL_ENDIANNESS)
96 
97 #define WCN36XX_DXE_CTRL_RX_L	(WCN36xx_DXE_CTRL_VLD | \
98 	WCN36xx_DXE_CTRL_XTYPE_SET(WCN36xx_DXE_XTYPE_B2H) | \
99 	WCN36xx_DXE_CTRL_EOP | WCN36xx_DXE_CTRL_SIQ | \
100 	WCN36xx_DXE_CTRL_PDU_REL | WCN36xx_DXE_CTRL_BTHLD_SEL_SET(6) | \
101 	WCN36xx_DXE_CTRL_PRIO_SET(5) | WCN36xx_DXE_CTRL_INT | \
102 	WCN36xx_DXE_CTRL_SWAP)
103 
104 #define WCN36XX_DXE_CTRL_RX_H	(WCN36xx_DXE_CTRL_VLD | \
105 	WCN36xx_DXE_CTRL_XTYPE_SET(WCN36xx_DXE_XTYPE_B2H) | \
106 	WCN36xx_DXE_CTRL_EOP | WCN36xx_DXE_CTRL_SIQ | \
107 	WCN36xx_DXE_CTRL_PDU_REL |  WCN36xx_DXE_CTRL_BTHLD_SEL_SET(8) | \
108 	WCN36xx_DXE_CTRL_PRIO_SET(6) | WCN36xx_DXE_CTRL_INT | \
109 	WCN36xx_DXE_CTRL_SWAP)
110 
111 #define WCN36XX_DXE_CTRL_TX_H_BD	(WCN36xx_DXE_CTRL_VLD | \
112 	WCN36xx_DXE_CTRL_XTYPE_SET(WCN36xx_DXE_XTYPE_H2B) | \
113 	WCN36xx_DXE_CTRL_DIQ | WCN36xx_DXE_CTRL_BTHLD_SEL_SET(7) | \
114 	WCN36xx_DXE_CTRL_PRIO_SET(6) | WCN36xx_DXE_CTRL_SWAP | \
115 	WCN36xx_DXE_CTRL_ENDIANNESS)
116 
117 #define WCN36XX_DXE_CTRL_TX_H_SKB	(WCN36xx_DXE_CTRL_VLD | \
118 	WCN36xx_DXE_CTRL_XTYPE_SET(WCN36xx_DXE_XTYPE_H2B) | \
119 	WCN36xx_DXE_CTRL_EOP | WCN36xx_DXE_CTRL_DIQ | \
120 	WCN36xx_DXE_CTRL_BTHLD_SEL_SET(7) | WCN36xx_DXE_CTRL_PRIO_SET(6) | \
121 	WCN36xx_DXE_CTRL_INT | WCN36xx_DXE_CTRL_SWAP | \
122 	WCN36xx_DXE_CTRL_ENDIANNESS)
123 
124 #define WCN36XX_DXE_CTRL_TX_L_BD	 (WCN36xx_DXE_CTRL_VLD | \
125 	WCN36xx_DXE_CTRL_XTYPE_SET(WCN36xx_DXE_XTYPE_H2B) | \
126 	WCN36xx_DXE_CTRL_DIQ | WCN36xx_DXE_CTRL_BTHLD_SEL_SET(5) | \
127 	WCN36xx_DXE_CTRL_PRIO_SET(4) | WCN36xx_DXE_CTRL_SWAP | \
128 	WCN36xx_DXE_CTRL_ENDIANNESS)
129 
130 #define WCN36XX_DXE_CTRL_TX_L_SKB	(WCN36xx_DXE_CTRL_VLD | \
131 	WCN36xx_DXE_CTRL_XTYPE_SET(WCN36xx_DXE_XTYPE_H2B) | \
132 	WCN36xx_DXE_CTRL_EOP | WCN36xx_DXE_CTRL_DIQ | \
133 	WCN36xx_DXE_CTRL_BTHLD_SEL_SET(5) | WCN36xx_DXE_CTRL_PRIO_SET(4) | \
134 	WCN36xx_DXE_CTRL_INT | WCN36xx_DXE_CTRL_SWAP | \
135 	WCN36xx_DXE_CTRL_ENDIANNESS)
136 
137 /* TODO This must calculated properly but not hardcoded */
138 #define WCN36XX_DXE_WQ_TX_L			0x17
139 #define WCN36XX_DXE_WQ_TX_H			0x17
140 #define WCN36XX_DXE_WQ_RX_L			0xB
141 #define WCN36XX_DXE_WQ_RX_H			0x4
142 
143 /* Channel enable or restart */
144 #define WCN36xx_DXE_CH_CTRL_EN			BIT(0)
145 /* End of packet bit */
146 #define WCN36xx_DXE_CH_CTRL_EOP			BIT(3)
147 /* BD Handling bit */
148 #define WCN36xx_DXE_CH_CTRL_BDH			BIT(4)
149 /* Source is queue */
150 #define WCN36xx_DXE_CH_CTRL_SIQ			BIT(5)
151 /* Destination is queue */
152 #define WCN36xx_DXE_CH_CTRL_DIQ			BIT(6)
153 /* Pointer descriptor is queue */
154 #define WCN36xx_DXE_CH_CTRL_PIQ			BIT(7)
155 /* Relase PDU when done */
156 #define WCN36xx_DXE_CH_CTRL_PDU_REL		BIT(8)
157 /* Stop channel processing */
158 #define WCN36xx_DXE_CH_CTRL_STOP		BIT(16)
159 /* Enable external descriptor interrupt */
160 #define WCN36xx_DXE_CH_CTRL_INE_ED		BIT(17)
161 /* Enable channel interrupt on errors */
162 #define WCN36xx_DXE_CH_CTRL_INE_ERR		BIT(18)
163 /* Enable Channel interrupt when done */
164 #define WCN36xx_DXE_CH_CTRL_INE_DONE	BIT(19)
165 /* External descriptor enable */
166 #define WCN36xx_DXE_CH_CTRL_EDEN		BIT(20)
167 /* Wait for valid bit */
168 #define WCN36xx_DXE_CH_CTRL_EDVEN		BIT(21)
169 /* Endianness is little endian*/
170 #define WCN36xx_DXE_CH_CTRL_ENDIANNESS	BIT(26)
171 /* Abort transfer */
172 #define WCN36xx_DXE_CH_CTRL_ABORT		BIT(27)
173 /* Long descriptor format */
174 #define WCN36xx_DXE_CH_CTRL_DFMT		BIT(28)
175 /* Endian byte swap enable */
176 #define WCN36xx_DXE_CH_CTRL_SWAP		BIT(31)
177 
178 /* Transfer type */
179 #define WCN36xx_DXE_CH_CTRL_XTYPE_SHIFT 1
180 #define WCN36xx_DXE_CH_CTRL_XTYPE_MASK GENMASK(2, WCN36xx_DXE_CH_CTRL_XTYPE_SHIFT)
181 #define WCN36xx_DXE_CH_CTRL_XTYPE_SET(x)	((x) << WCN36xx_DXE_CH_CTRL_XTYPE_SHIFT)
182 
183 /* Channel BMU Threshold select */
184 #define WCN36xx_DXE_CH_CTRL_BTHLD_SEL_SHIFT 9
185 #define WCN36xx_DXE_CH_CTRL_BTHLD_SEL_MASK GENMASK(12, WCN36xx_DXE_CH_CTRL_BTHLD_SEL_SHIFT)
186 #define WCN36xx_DXE_CH_CTRL_BTHLD_SEL_SET(x) ((x) << WCN36xx_DXE_CH_CTRL_BTHLD_SEL_SHIFT)
187 
188 /* Channel Priority */
189 #define WCN36xx_DXE_CH_CTRL_PRIO_SHIFT 13
190 #define WCN36xx_DXE_CH_CTRL_PRIO_MASK GENMASK(15, WCN36xx_DXE_CH_CTRL_PRIO_SHIFT)
191 #define WCN36xx_DXE_CH_CTRL_PRIO_SET(x) ((x) << WCN36xx_DXE_CH_CTRL_PRIO_SHIFT)
192 
193 /* Counter select */
194 #define WCN36xx_DXE_CH_CTRL_SEL_SHIFT 22
195 #define WCN36xx_DXE_CH_CTRL_SEL_MASK GENMASK(25, WCN36xx_DXE_CH_CTRL_SEL_SHIFT)
196 #define WCN36xx_DXE_CH_CTRL_SEL_SET(x)	((x) << WCN36xx_DXE_CH_CTRL_SEL_SHIFT)
197 
198 /* Channel BD template index */
199 #define WCN36xx_DXE_CH_CTRL_BDT_IDX_SHIFT 29
200 #define WCN36xx_DXE_CH_CTRL_BDT_IDX_MASK GENMASK(30, WCN36xx_DXE_CH_CTRL_BDT_IDX_SHIFT)
201 #define WCN36xx_DXE_CH_CTRL_BDT_IDX_SET(x)	((x) << WCN36xx_DXE_CH_CTRL_BDT_IDX_SHIFT)
202 
203 /* DXE default control register values */
204 #define WCN36XX_DXE_CH_DEFAULT_CTL_RX_L (WCN36xx_DXE_CH_CTRL_EN | \
205 		WCN36xx_DXE_CH_CTRL_XTYPE_SET(WCN36xx_DXE_XTYPE_B2H) | \
206 		WCN36xx_DXE_CH_CTRL_EOP | WCN36xx_DXE_CH_CTRL_SIQ | \
207 		WCN36xx_DXE_CH_CTRL_PDU_REL | WCN36xx_DXE_CH_CTRL_BTHLD_SEL_SET(6) | \
208 		WCN36xx_DXE_CH_CTRL_PRIO_SET(5) | WCN36xx_DXE_CH_CTRL_INE_ED | \
209 		WCN36xx_DXE_CH_CTRL_INE_ERR | WCN36xx_DXE_CH_CTRL_INE_DONE | \
210 		WCN36xx_DXE_CH_CTRL_EDEN | WCN36xx_DXE_CH_CTRL_EDVEN | \
211 		WCN36xx_DXE_CH_CTRL_SEL_SET(1) | WCN36xx_DXE_CH_CTRL_ENDIANNESS | \
212 		WCN36xx_DXE_CH_CTRL_SWAP)
213 
214 #define WCN36XX_DXE_CH_DEFAULT_CTL_RX_H (WCN36xx_DXE_CH_CTRL_EN | \
215 		WCN36xx_DXE_CH_CTRL_XTYPE_SET(WCN36xx_DXE_XTYPE_B2H) | \
216 		WCN36xx_DXE_CH_CTRL_EOP | WCN36xx_DXE_CH_CTRL_SIQ | \
217 		WCN36xx_DXE_CH_CTRL_PDU_REL | WCN36xx_DXE_CH_CTRL_BTHLD_SEL_SET(8) | \
218 		WCN36xx_DXE_CH_CTRL_PRIO_SET(6) | WCN36xx_DXE_CH_CTRL_INE_ED | \
219 		WCN36xx_DXE_CH_CTRL_INE_ERR | WCN36xx_DXE_CH_CTRL_INE_DONE | \
220 		WCN36xx_DXE_CH_CTRL_EDEN | WCN36xx_DXE_CH_CTRL_EDVEN | \
221 		WCN36xx_DXE_CH_CTRL_SEL_SET(3) | WCN36xx_DXE_CH_CTRL_ENDIANNESS | \
222 		WCN36xx_DXE_CH_CTRL_SWAP)
223 
224 #define WCN36XX_DXE_CH_DEFAULT_CTL_TX_H	(WCN36xx_DXE_CH_CTRL_EN | \
225 		WCN36xx_DXE_CH_CTRL_XTYPE_SET(WCN36xx_DXE_XTYPE_H2B) | \
226 		WCN36xx_DXE_CH_CTRL_EOP | WCN36xx_DXE_CH_CTRL_DIQ | \
227 		WCN36xx_DXE_CH_CTRL_PDU_REL | WCN36xx_DXE_CH_CTRL_BTHLD_SEL_SET(7) | \
228 		WCN36xx_DXE_CH_CTRL_PRIO_SET(6) | WCN36xx_DXE_CH_CTRL_INE_ED | \
229 		WCN36xx_DXE_CH_CTRL_INE_ERR | WCN36xx_DXE_CH_CTRL_INE_DONE | \
230 		WCN36xx_DXE_CH_CTRL_EDEN | WCN36xx_DXE_CH_CTRL_EDVEN | \
231 		WCN36xx_DXE_CH_CTRL_SEL_SET(4) | WCN36xx_DXE_CH_CTRL_ENDIANNESS | \
232 		WCN36xx_DXE_CH_CTRL_SWAP)
233 
234 #define WCN36XX_DXE_CH_DEFAULT_CTL_TX_L (WCN36xx_DXE_CH_CTRL_EN | \
235 		WCN36xx_DXE_CH_CTRL_XTYPE_SET(WCN36xx_DXE_XTYPE_H2B) | \
236 		WCN36xx_DXE_CH_CTRL_EOP | WCN36xx_DXE_CH_CTRL_DIQ | \
237 		WCN36xx_DXE_CH_CTRL_PDU_REL | WCN36xx_DXE_CH_CTRL_BTHLD_SEL_SET(5) | \
238 		WCN36xx_DXE_CH_CTRL_PRIO_SET(4) | WCN36xx_DXE_CH_CTRL_INE_ED | \
239 		WCN36xx_DXE_CH_CTRL_INE_ERR | WCN36xx_DXE_CH_CTRL_INE_DONE | \
240 		WCN36xx_DXE_CH_CTRL_EDEN | WCN36xx_DXE_CH_CTRL_EDVEN | \
241 		WCN36xx_DXE_CH_CTRL_SEL_SET(0) | WCN36xx_DXE_CH_CTRL_ENDIANNESS | \
242 		WCN36xx_DXE_CH_CTRL_SWAP)
243 
244 /* Common DXE registers */
245 #define WCN36XX_DXE_MEM_CSR			(WCN36XX_DXE_MEM_REG + 0x00)
246 #define WCN36XX_DXE_REG_CSR_RESET		(WCN36XX_DXE_MEM_REG + 0x00)
247 #define WCN36XX_DXE_ENCH_ADDR			(WCN36XX_DXE_MEM_REG + 0x04)
248 #define WCN36XX_DXE_REG_CH_EN			(WCN36XX_DXE_MEM_REG + 0x08)
249 #define WCN36XX_DXE_REG_CH_DONE			(WCN36XX_DXE_MEM_REG + 0x0C)
250 #define WCN36XX_DXE_REG_CH_ERR			(WCN36XX_DXE_MEM_REG + 0x10)
251 #define WCN36XX_DXE_INT_MASK_REG		(WCN36XX_DXE_MEM_REG + 0x18)
252 #define WCN36XX_DXE_INT_SRC_RAW_REG		(WCN36XX_DXE_MEM_REG + 0x20)
253 	/* #define WCN36XX_DXE_INT_CH6_MASK	0x00000040 */
254 	/* #define WCN36XX_DXE_INT_CH5_MASK	0x00000020 */
255 	#define WCN36XX_DXE_INT_CH4_MASK	0x00000010
256 	#define WCN36XX_DXE_INT_CH3_MASK	0x00000008
257 	/* #define WCN36XX_DXE_INT_CH2_MASK	0x00000004 */
258 	#define WCN36XX_DXE_INT_CH1_MASK	0x00000002
259 	#define WCN36XX_DXE_INT_CH0_MASK	0x00000001
260 #define WCN36XX_DXE_0_INT_CLR			(WCN36XX_DXE_MEM_REG + 0x30)
261 #define WCN36XX_DXE_0_INT_ED_CLR		(WCN36XX_DXE_MEM_REG + 0x34)
262 #define WCN36XX_DXE_0_INT_DONE_CLR		(WCN36XX_DXE_MEM_REG + 0x38)
263 #define WCN36XX_DXE_0_INT_ERR_CLR		(WCN36XX_DXE_MEM_REG + 0x3C)
264 
265 #define WCN36XX_CH_STAT_INT_DONE_MASK   0x00008000
266 #define WCN36XX_CH_STAT_INT_ERR_MASK    0x00004000
267 #define WCN36XX_CH_STAT_INT_ED_MASK     0x00002000
268 
269 #define WCN36XX_DXE_0_CH0_STATUS		(WCN36XX_DXE_MEM_REG + 0x404)
270 #define WCN36XX_DXE_0_CH1_STATUS		(WCN36XX_DXE_MEM_REG + 0x444)
271 #define WCN36XX_DXE_0_CH2_STATUS		(WCN36XX_DXE_MEM_REG + 0x484)
272 #define WCN36XX_DXE_0_CH3_STATUS		(WCN36XX_DXE_MEM_REG + 0x4C4)
273 #define WCN36XX_DXE_0_CH4_STATUS		(WCN36XX_DXE_MEM_REG + 0x504)
274 
275 #define WCN36XX_DXE_REG_RESET			0x5c89
276 
277 /* Temporary BMU Workqueue 4 */
278 #define WCN36XX_DXE_BMU_WQ_RX_LOW		0xB
279 #define WCN36XX_DXE_BMU_WQ_RX_HIGH		0x4
280 /* DMA channel offset */
281 #define WCN36XX_DXE_TX_LOW_OFFSET		0x400
282 #define WCN36XX_DXE_TX_HIGH_OFFSET		0x500
283 #define WCN36XX_DXE_RX_LOW_OFFSET		0x440
284 #define WCN36XX_DXE_RX_HIGH_OFFSET		0x4C0
285 
286 /* Address of the next DXE descriptor */
287 #define WCN36XX_DXE_CH_NEXT_DESC_ADDR		0x001C
288 #define WCN36XX_DXE_CH_NEXT_DESC_ADDR_TX_L	(WCN36XX_DXE_MEM_REG + \
289 						 WCN36XX_DXE_TX_LOW_OFFSET + \
290 						 WCN36XX_DXE_CH_NEXT_DESC_ADDR)
291 #define WCN36XX_DXE_CH_NEXT_DESC_ADDR_TX_H	(WCN36XX_DXE_MEM_REG + \
292 						 WCN36XX_DXE_TX_HIGH_OFFSET + \
293 						 WCN36XX_DXE_CH_NEXT_DESC_ADDR)
294 #define WCN36XX_DXE_CH_NEXT_DESC_ADDR_RX_L	(WCN36XX_DXE_MEM_REG + \
295 						 WCN36XX_DXE_RX_LOW_OFFSET + \
296 						 WCN36XX_DXE_CH_NEXT_DESC_ADDR)
297 #define WCN36XX_DXE_CH_NEXT_DESC_ADDR_RX_H	(WCN36XX_DXE_MEM_REG + \
298 						 WCN36XX_DXE_RX_HIGH_OFFSET + \
299 						 WCN36XX_DXE_CH_NEXT_DESC_ADDR)
300 
301 /* DXE Descriptor source address */
302 #define WCN36XX_DXE_CH_SRC_ADDR			0x000C
303 #define WCN36XX_DXE_CH_SRC_ADDR_RX_L		(WCN36XX_DXE_MEM_REG + \
304 						 WCN36XX_DXE_RX_LOW_OFFSET + \
305 						 WCN36XX_DXE_CH_SRC_ADDR)
306 #define WCN36XX_DXE_CH_SRC_ADDR_RX_H		(WCN36XX_DXE_MEM_REG + \
307 						 WCN36XX_DXE_RX_HIGH_OFFSET + \
308 						 WCN36XX_DXE_CH_SRC_ADDR)
309 
310 /* DXE Descriptor address destination address */
311 #define WCN36XX_DXE_CH_DEST_ADDR		0x0014
312 #define WCN36XX_DXE_CH_DEST_ADDR_TX_L		(WCN36XX_DXE_MEM_REG + \
313 						 WCN36XX_DXE_TX_LOW_OFFSET + \
314 						 WCN36XX_DXE_CH_DEST_ADDR)
315 #define WCN36XX_DXE_CH_DEST_ADDR_TX_H		(WCN36XX_DXE_MEM_REG + \
316 						 WCN36XX_DXE_TX_HIGH_OFFSET + \
317 						 WCN36XX_DXE_CH_DEST_ADDR)
318 #define WCN36XX_DXE_CH_DEST_ADDR_RX_L		(WCN36XX_DXE_MEM_REG + \
319 						 WCN36XX_DXE_RX_LOW_OFFSET + \
320 						 WCN36XX_DXE_CH_DEST_ADDR)
321 #define WCN36XX_DXE_CH_DEST_ADDR_RX_H		(WCN36XX_DXE_MEM_REG + \
322 						 WCN36XX_DXE_RX_HIGH_OFFSET + \
323 						 WCN36XX_DXE_CH_DEST_ADDR)
324 
325 /* Interrupt status */
326 #define WCN36XX_DXE_CH_STATUS_REG_ADDR		0x0004
327 #define WCN36XX_DXE_CH_STATUS_REG_ADDR_TX_L	(WCN36XX_DXE_MEM_REG + \
328 						 WCN36XX_DXE_TX_LOW_OFFSET + \
329 						 WCN36XX_DXE_CH_STATUS_REG_ADDR)
330 #define WCN36XX_DXE_CH_STATUS_REG_ADDR_TX_H	(WCN36XX_DXE_MEM_REG + \
331 						 WCN36XX_DXE_TX_HIGH_OFFSET + \
332 						 WCN36XX_DXE_CH_STATUS_REG_ADDR)
333 #define WCN36XX_DXE_CH_STATUS_REG_ADDR_RX_L	(WCN36XX_DXE_MEM_REG + \
334 						 WCN36XX_DXE_RX_LOW_OFFSET + \
335 						 WCN36XX_DXE_CH_STATUS_REG_ADDR)
336 #define WCN36XX_DXE_CH_STATUS_REG_ADDR_RX_H	(WCN36XX_DXE_MEM_REG + \
337 						 WCN36XX_DXE_RX_HIGH_OFFSET + \
338 						 WCN36XX_DXE_CH_STATUS_REG_ADDR)
339 
340 
341 /* DXE default control register */
342 #define WCN36XX_DXE_REG_CTL_RX_L		(WCN36XX_DXE_MEM_REG + \
343 						 WCN36XX_DXE_RX_LOW_OFFSET)
344 #define WCN36XX_DXE_REG_CTL_RX_H		(WCN36XX_DXE_MEM_REG + \
345 						 WCN36XX_DXE_RX_HIGH_OFFSET)
346 #define WCN36XX_DXE_REG_CTL_TX_H		(WCN36XX_DXE_MEM_REG + \
347 						 WCN36XX_DXE_TX_HIGH_OFFSET)
348 #define WCN36XX_DXE_REG_CTL_TX_L		(WCN36XX_DXE_MEM_REG + \
349 						 WCN36XX_DXE_TX_LOW_OFFSET)
350 
351 #define WCN36XX_SMSM_WLAN_TX_ENABLE		0x00000400
352 #define WCN36XX_SMSM_WLAN_TX_RINGS_EMPTY	0x00000200
353 
354 
355 /* Interrupt control channel mask */
356 #define WCN36XX_INT_MASK_CHAN_TX_L		0x00000001
357 #define WCN36XX_INT_MASK_CHAN_RX_L		0x00000002
358 #define WCN36XX_INT_MASK_CHAN_RX_H		0x00000008
359 #define WCN36XX_INT_MASK_CHAN_TX_H		0x00000010
360 
361 #define WCN36XX_BD_CHUNK_SIZE			128
362 
363 #define WCN36XX_PKT_SIZE			0xF20
364 enum wcn36xx_dxe_ch_type {
365 	WCN36XX_DXE_CH_TX_L,
366 	WCN36XX_DXE_CH_TX_H,
367 	WCN36XX_DXE_CH_RX_L,
368 	WCN36XX_DXE_CH_RX_H
369 };
370 
371 /* amount of descriptors per channel */
372 enum wcn36xx_dxe_ch_desc_num {
373 	WCN36XX_DXE_CH_DESC_NUMB_TX_L		= 128,
374 	WCN36XX_DXE_CH_DESC_NUMB_TX_H		= 10,
375 	WCN36XX_DXE_CH_DESC_NUMB_RX_L		= 512,
376 	WCN36XX_DXE_CH_DESC_NUMB_RX_H		= 40
377 };
378 
379 /**
380  * struct wcn36xx_dxe_desc - describes descriptor of one DXE buffer
381  *
382  * @ctrl: is a union that consists of following bits:
383  * union {
384  *	u32	valid		:1; //0 = DMA stop, 1 = DMA continue with this
385  *				    //descriptor
386  *	u32	transfer_type	:2; //0 = Host to Host space
387  *	u32	eop		:1; //End of Packet
388  *	u32	bd_handling	:1; //if transferType = Host to BMU, then 0
389  *				    // means first 128 bytes contain BD, and 1
390  *				    // means create new empty BD
391  *	u32	siq		:1; // SIQ
392  *	u32	diq		:1; // DIQ
393  *	u32	pdu_rel		:1; //0 = don't release BD and PDUs when done,
394  *				    // 1 = release them
395  *	u32	bthld_sel	:4; //BMU Threshold Select
396  *	u32	prio		:3; //Specifies the priority level to use for
397  *				    // the transfer
398  *	u32	stop_channel	:1; //1 = DMA stops processing further, channel
399  *				    //requires re-enabling after this
400  *	u32	intr		:1; //Interrupt on Descriptor Done
401  *	u32	rsvd		:1; //reserved
402  *	u32	size		:14;//14 bits used - ignored for BMU transfers,
403  *				    //only used for host to host transfers?
404  * } ctrl;
405  */
406 struct wcn36xx_dxe_desc {
407 	u32	ctrl;
408 	u32	fr_len;
409 
410 	u32	src_addr_l;
411 	u32	dst_addr_l;
412 	u32	phy_next_l;
413 	u32	src_addr_h;
414 	u32	dst_addr_h;
415 	u32	phy_next_h;
416 } __packed;
417 
418 /* DXE Control block */
419 struct wcn36xx_dxe_ctl {
420 	struct wcn36xx_dxe_ctl	*next;
421 	struct wcn36xx_dxe_desc	*desc;
422 	unsigned int		desc_phy_addr;
423 	int			ctl_blk_order;
424 	struct sk_buff		*skb;
425 	void			*bd_cpu_addr;
426 	dma_addr_t		bd_phy_addr;
427 };
428 
429 struct wcn36xx_dxe_ch {
430 	spinlock_t			lock;	/* protects head/tail ptrs */
431 	enum wcn36xx_dxe_ch_type	ch_type;
432 	void				*cpu_addr;
433 	dma_addr_t			dma_addr;
434 	enum wcn36xx_dxe_ch_desc_num	desc_num;
435 	/* DXE control block ring */
436 	struct wcn36xx_dxe_ctl		*head_blk_ctl;
437 	struct wcn36xx_dxe_ctl		*tail_blk_ctl;
438 
439 	/* DXE channel specific configs */
440 	u32				dxe_wq;
441 	u32				ctrl_bd;
442 	u32				ctrl_skb;
443 	u32				reg_ctrl;
444 	u32				def_ctrl;
445 };
446 
447 /* Memory Pool for BD headers */
448 struct wcn36xx_dxe_mem_pool {
449 	int		chunk_size;
450 	void		*virt_addr;
451 	dma_addr_t	phy_addr;
452 };
453 
454 struct wcn36xx_tx_bd;
455 struct wcn36xx_vif;
456 int wcn36xx_dxe_allocate_mem_pools(struct wcn36xx *wcn);
457 void wcn36xx_dxe_free_mem_pools(struct wcn36xx *wcn);
458 void wcn36xx_dxe_rx_frame(struct wcn36xx *wcn);
459 int wcn36xx_dxe_alloc_ctl_blks(struct wcn36xx *wcn);
460 void wcn36xx_dxe_free_ctl_blks(struct wcn36xx *wcn);
461 int wcn36xx_dxe_init(struct wcn36xx *wcn);
462 void wcn36xx_dxe_deinit(struct wcn36xx *wcn);
463 int wcn36xx_dxe_init_channels(struct wcn36xx *wcn);
464 int wcn36xx_dxe_tx_frame(struct wcn36xx *wcn,
465 			 struct wcn36xx_vif *vif_priv,
466 			 struct wcn36xx_tx_bd *bd,
467 			 struct sk_buff *skb,
468 			 bool is_low);
469 int wcn36xx_dxe_tx_flush(struct wcn36xx *wcn);
470 void wcn36xx_dxe_tx_ack_ind(struct wcn36xx *wcn, u32 status);
471 #endif	/* _DXE_H_ */
472