xref: /linux/include/ufs/ufshci.h (revision 24bce201d79807b668bf9d9e0aca801c5c0d5f78)
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * Universal Flash Storage Host controller driver
4  * Copyright (C) 2011-2013 Samsung India Software Operations
5  *
6  * Authors:
7  *	Santosh Yaraganavi <santosh.sy@samsung.com>
8  *	Vinayak Holikatti <h.vinayak@samsung.com>
9  */
10 
11 #ifndef _UFSHCI_H
12 #define _UFSHCI_H
13 
14 #include <scsi/scsi_host.h>
15 
16 enum {
17 	TASK_REQ_UPIU_SIZE_DWORDS	= 8,
18 	TASK_RSP_UPIU_SIZE_DWORDS	= 8,
19 	ALIGNED_UPIU_SIZE		= 512,
20 };
21 
22 /* UFSHCI Registers */
23 enum {
24 	REG_CONTROLLER_CAPABILITIES		= 0x00,
25 	REG_UFS_VERSION				= 0x08,
26 	REG_CONTROLLER_DEV_ID			= 0x10,
27 	REG_CONTROLLER_PROD_ID			= 0x14,
28 	REG_AUTO_HIBERNATE_IDLE_TIMER		= 0x18,
29 	REG_INTERRUPT_STATUS			= 0x20,
30 	REG_INTERRUPT_ENABLE			= 0x24,
31 	REG_CONTROLLER_STATUS			= 0x30,
32 	REG_CONTROLLER_ENABLE			= 0x34,
33 	REG_UIC_ERROR_CODE_PHY_ADAPTER_LAYER	= 0x38,
34 	REG_UIC_ERROR_CODE_DATA_LINK_LAYER	= 0x3C,
35 	REG_UIC_ERROR_CODE_NETWORK_LAYER	= 0x40,
36 	REG_UIC_ERROR_CODE_TRANSPORT_LAYER	= 0x44,
37 	REG_UIC_ERROR_CODE_DME			= 0x48,
38 	REG_UTP_TRANSFER_REQ_INT_AGG_CONTROL	= 0x4C,
39 	REG_UTP_TRANSFER_REQ_LIST_BASE_L	= 0x50,
40 	REG_UTP_TRANSFER_REQ_LIST_BASE_H	= 0x54,
41 	REG_UTP_TRANSFER_REQ_DOOR_BELL		= 0x58,
42 	REG_UTP_TRANSFER_REQ_LIST_CLEAR		= 0x5C,
43 	REG_UTP_TRANSFER_REQ_LIST_RUN_STOP	= 0x60,
44 	REG_UTP_TASK_REQ_LIST_BASE_L		= 0x70,
45 	REG_UTP_TASK_REQ_LIST_BASE_H		= 0x74,
46 	REG_UTP_TASK_REQ_DOOR_BELL		= 0x78,
47 	REG_UTP_TASK_REQ_LIST_CLEAR		= 0x7C,
48 	REG_UTP_TASK_REQ_LIST_RUN_STOP		= 0x80,
49 	REG_UIC_COMMAND				= 0x90,
50 	REG_UIC_COMMAND_ARG_1			= 0x94,
51 	REG_UIC_COMMAND_ARG_2			= 0x98,
52 	REG_UIC_COMMAND_ARG_3			= 0x9C,
53 
54 	UFSHCI_REG_SPACE_SIZE			= 0xA0,
55 
56 	REG_UFS_CCAP				= 0x100,
57 	REG_UFS_CRYPTOCAP			= 0x104,
58 
59 	UFSHCI_CRYPTO_REG_SPACE_SIZE		= 0x400,
60 };
61 
62 /* Controller capability masks */
63 enum {
64 	MASK_TRANSFER_REQUESTS_SLOTS		= 0x0000001F,
65 	MASK_TASK_MANAGEMENT_REQUEST_SLOTS	= 0x00070000,
66 	MASK_AUTO_HIBERN8_SUPPORT		= 0x00800000,
67 	MASK_64_ADDRESSING_SUPPORT		= 0x01000000,
68 	MASK_OUT_OF_ORDER_DATA_DELIVERY_SUPPORT	= 0x02000000,
69 	MASK_UIC_DME_TEST_MODE_SUPPORT		= 0x04000000,
70 	MASK_CRYPTO_SUPPORT			= 0x10000000,
71 };
72 
73 #define UFS_MASK(mask, offset)		((mask) << (offset))
74 
75 /* UFS Version 08h */
76 #define MINOR_VERSION_NUM_MASK		UFS_MASK(0xFFFF, 0)
77 #define MAJOR_VERSION_NUM_MASK		UFS_MASK(0xFFFF, 16)
78 
79 /*
80  * Controller UFSHCI version
81  * - 2.x and newer use the following scheme:
82  *   major << 8 + minor << 4
83  * - 1.x has been converted to match this in
84  *   ufshcd_get_ufs_version()
85  */
86 static inline u32 ufshci_version(u32 major, u32 minor)
87 {
88 	return (major << 8) + (minor << 4);
89 }
90 
91 /*
92  * HCDDID - Host Controller Identification Descriptor
93  *	  - Device ID and Device Class 10h
94  */
95 #define DEVICE_CLASS	UFS_MASK(0xFFFF, 0)
96 #define DEVICE_ID	UFS_MASK(0xFF, 24)
97 
98 /*
99  * HCPMID - Host Controller Identification Descriptor
100  *	  - Product/Manufacturer ID  14h
101  */
102 #define MANUFACTURE_ID_MASK	UFS_MASK(0xFFFF, 0)
103 #define PRODUCT_ID_MASK		UFS_MASK(0xFFFF, 16)
104 
105 /* AHIT - Auto-Hibernate Idle Timer */
106 #define UFSHCI_AHIBERN8_TIMER_MASK		GENMASK(9, 0)
107 #define UFSHCI_AHIBERN8_SCALE_MASK		GENMASK(12, 10)
108 #define UFSHCI_AHIBERN8_SCALE_FACTOR		10
109 #define UFSHCI_AHIBERN8_MAX			(1023 * 100000)
110 
111 /*
112  * IS - Interrupt Status - 20h
113  */
114 #define UTP_TRANSFER_REQ_COMPL			0x1
115 #define UIC_DME_END_PT_RESET			0x2
116 #define UIC_ERROR				0x4
117 #define UIC_TEST_MODE				0x8
118 #define UIC_POWER_MODE				0x10
119 #define UIC_HIBERNATE_EXIT			0x20
120 #define UIC_HIBERNATE_ENTER			0x40
121 #define UIC_LINK_LOST				0x80
122 #define UIC_LINK_STARTUP			0x100
123 #define UTP_TASK_REQ_COMPL			0x200
124 #define UIC_COMMAND_COMPL			0x400
125 #define DEVICE_FATAL_ERROR			0x800
126 #define CONTROLLER_FATAL_ERROR			0x10000
127 #define SYSTEM_BUS_FATAL_ERROR			0x20000
128 #define CRYPTO_ENGINE_FATAL_ERROR		0x40000
129 
130 #define UFSHCD_UIC_HIBERN8_MASK	(UIC_HIBERNATE_ENTER |\
131 				UIC_HIBERNATE_EXIT)
132 
133 #define UFSHCD_UIC_PWR_MASK	(UFSHCD_UIC_HIBERN8_MASK |\
134 				UIC_POWER_MODE)
135 
136 #define UFSHCD_UIC_MASK		(UIC_COMMAND_COMPL | UFSHCD_UIC_PWR_MASK)
137 
138 #define UFSHCD_ERROR_MASK	(UIC_ERROR |\
139 				DEVICE_FATAL_ERROR |\
140 				CONTROLLER_FATAL_ERROR |\
141 				SYSTEM_BUS_FATAL_ERROR |\
142 				CRYPTO_ENGINE_FATAL_ERROR)
143 
144 #define INT_FATAL_ERRORS	(DEVICE_FATAL_ERROR |\
145 				CONTROLLER_FATAL_ERROR |\
146 				SYSTEM_BUS_FATAL_ERROR |\
147 				CRYPTO_ENGINE_FATAL_ERROR |\
148 				UIC_LINK_LOST)
149 
150 /* HCS - Host Controller Status 30h */
151 #define DEVICE_PRESENT				0x1
152 #define UTP_TRANSFER_REQ_LIST_READY		0x2
153 #define UTP_TASK_REQ_LIST_READY			0x4
154 #define UIC_COMMAND_READY			0x8
155 #define HOST_ERROR_INDICATOR			0x10
156 #define DEVICE_ERROR_INDICATOR			0x20
157 #define UIC_POWER_MODE_CHANGE_REQ_STATUS_MASK	UFS_MASK(0x7, 8)
158 
159 #define UFSHCD_STATUS_READY	(UTP_TRANSFER_REQ_LIST_READY |\
160 				UTP_TASK_REQ_LIST_READY |\
161 				UIC_COMMAND_READY)
162 
163 enum {
164 	PWR_OK		= 0x0,
165 	PWR_LOCAL	= 0x01,
166 	PWR_REMOTE	= 0x02,
167 	PWR_BUSY	= 0x03,
168 	PWR_ERROR_CAP	= 0x04,
169 	PWR_FATAL_ERROR	= 0x05,
170 };
171 
172 /* HCE - Host Controller Enable 34h */
173 #define CONTROLLER_ENABLE	0x1
174 #define CONTROLLER_DISABLE	0x0
175 #define CRYPTO_GENERAL_ENABLE	0x2
176 
177 /* UECPA - Host UIC Error Code PHY Adapter Layer 38h */
178 #define UIC_PHY_ADAPTER_LAYER_ERROR			0x80000000
179 #define UIC_PHY_ADAPTER_LAYER_ERROR_CODE_MASK		0x1F
180 #define UIC_PHY_ADAPTER_LAYER_LANE_ERR_MASK		0xF
181 #define UIC_PHY_ADAPTER_LAYER_GENERIC_ERROR		0x10
182 
183 /* UECDL - Host UIC Error Code Data Link Layer 3Ch */
184 #define UIC_DATA_LINK_LAYER_ERROR		0x80000000
185 #define UIC_DATA_LINK_LAYER_ERROR_CODE_MASK	0xFFFF
186 #define UIC_DATA_LINK_LAYER_ERROR_TCX_REP_TIMER_EXP	0x2
187 #define UIC_DATA_LINK_LAYER_ERROR_AFCX_REQ_TIMER_EXP	0x4
188 #define UIC_DATA_LINK_LAYER_ERROR_FCX_PRO_TIMER_EXP	0x8
189 #define UIC_DATA_LINK_LAYER_ERROR_RX_BUF_OF	0x20
190 #define UIC_DATA_LINK_LAYER_ERROR_PA_INIT	0x2000
191 #define UIC_DATA_LINK_LAYER_ERROR_NAC_RECEIVED	0x0001
192 #define UIC_DATA_LINK_LAYER_ERROR_TCx_REPLAY_TIMEOUT 0x0002
193 
194 /* UECN - Host UIC Error Code Network Layer 40h */
195 #define UIC_NETWORK_LAYER_ERROR			0x80000000
196 #define UIC_NETWORK_LAYER_ERROR_CODE_MASK	0x7
197 #define UIC_NETWORK_UNSUPPORTED_HEADER_TYPE	0x1
198 #define UIC_NETWORK_BAD_DEVICEID_ENC		0x2
199 #define UIC_NETWORK_LHDR_TRAP_PACKET_DROPPING	0x4
200 
201 /* UECT - Host UIC Error Code Transport Layer 44h */
202 #define UIC_TRANSPORT_LAYER_ERROR		0x80000000
203 #define UIC_TRANSPORT_LAYER_ERROR_CODE_MASK	0x7F
204 #define UIC_TRANSPORT_UNSUPPORTED_HEADER_TYPE	0x1
205 #define UIC_TRANSPORT_UNKNOWN_CPORTID		0x2
206 #define UIC_TRANSPORT_NO_CONNECTION_RX		0x4
207 #define UIC_TRANSPORT_CONTROLLED_SEGMENT_DROPPING	0x8
208 #define UIC_TRANSPORT_BAD_TC			0x10
209 #define UIC_TRANSPORT_E2E_CREDIT_OVERFOW	0x20
210 #define UIC_TRANSPORT_SAFETY_VALUE_DROPPING	0x40
211 
212 /* UECDME - Host UIC Error Code DME 48h */
213 #define UIC_DME_ERROR			0x80000000
214 #define UIC_DME_ERROR_CODE_MASK		0x1
215 
216 /* UTRIACR - Interrupt Aggregation control register - 0x4Ch */
217 #define INT_AGGR_TIMEOUT_VAL_MASK		0xFF
218 #define INT_AGGR_COUNTER_THRESHOLD_MASK		UFS_MASK(0x1F, 8)
219 #define INT_AGGR_COUNTER_AND_TIMER_RESET	0x10000
220 #define INT_AGGR_STATUS_BIT			0x100000
221 #define INT_AGGR_PARAM_WRITE			0x1000000
222 #define INT_AGGR_ENABLE				0x80000000
223 
224 /* UTRLRSR - UTP Transfer Request Run-Stop Register 60h */
225 #define UTP_TRANSFER_REQ_LIST_RUN_STOP_BIT	0x1
226 
227 /* UTMRLRSR - UTP Task Management Request Run-Stop Register 80h */
228 #define UTP_TASK_REQ_LIST_RUN_STOP_BIT		0x1
229 
230 /* UICCMD - UIC Command */
231 #define COMMAND_OPCODE_MASK		0xFF
232 #define GEN_SELECTOR_INDEX_MASK		0xFFFF
233 
234 #define MIB_ATTRIBUTE_MASK		UFS_MASK(0xFFFF, 16)
235 #define RESET_LEVEL			0xFF
236 
237 #define ATTR_SET_TYPE_MASK		UFS_MASK(0xFF, 16)
238 #define CONFIG_RESULT_CODE_MASK		0xFF
239 #define GENERIC_ERROR_CODE_MASK		0xFF
240 
241 /* GenSelectorIndex calculation macros for M-PHY attributes */
242 #define UIC_ARG_MPHY_TX_GEN_SEL_INDEX(lane) (lane)
243 #define UIC_ARG_MPHY_RX_GEN_SEL_INDEX(lane) (PA_MAXDATALANES + (lane))
244 
245 #define UIC_ARG_MIB_SEL(attr, sel)	((((attr) & 0xFFFF) << 16) |\
246 					 ((sel) & 0xFFFF))
247 #define UIC_ARG_MIB(attr)		UIC_ARG_MIB_SEL(attr, 0)
248 #define UIC_ARG_ATTR_TYPE(t)		(((t) & 0xFF) << 16)
249 #define UIC_GET_ATTR_ID(v)		(((v) >> 16) & 0xFFFF)
250 
251 /* Link Status*/
252 enum link_status {
253 	UFSHCD_LINK_IS_DOWN	= 1,
254 	UFSHCD_LINK_IS_UP	= 2,
255 };
256 
257 /* UIC Commands */
258 enum uic_cmd_dme {
259 	UIC_CMD_DME_GET			= 0x01,
260 	UIC_CMD_DME_SET			= 0x02,
261 	UIC_CMD_DME_PEER_GET		= 0x03,
262 	UIC_CMD_DME_PEER_SET		= 0x04,
263 	UIC_CMD_DME_POWERON		= 0x10,
264 	UIC_CMD_DME_POWEROFF		= 0x11,
265 	UIC_CMD_DME_ENABLE		= 0x12,
266 	UIC_CMD_DME_RESET		= 0x14,
267 	UIC_CMD_DME_END_PT_RST		= 0x15,
268 	UIC_CMD_DME_LINK_STARTUP	= 0x16,
269 	UIC_CMD_DME_HIBER_ENTER		= 0x17,
270 	UIC_CMD_DME_HIBER_EXIT		= 0x18,
271 	UIC_CMD_DME_TEST_MODE		= 0x1A,
272 };
273 
274 /* UIC Config result code / Generic error code */
275 enum {
276 	UIC_CMD_RESULT_SUCCESS			= 0x00,
277 	UIC_CMD_RESULT_INVALID_ATTR		= 0x01,
278 	UIC_CMD_RESULT_FAILURE			= 0x01,
279 	UIC_CMD_RESULT_INVALID_ATTR_VALUE	= 0x02,
280 	UIC_CMD_RESULT_READ_ONLY_ATTR		= 0x03,
281 	UIC_CMD_RESULT_WRITE_ONLY_ATTR		= 0x04,
282 	UIC_CMD_RESULT_BAD_INDEX		= 0x05,
283 	UIC_CMD_RESULT_LOCKED_ATTR		= 0x06,
284 	UIC_CMD_RESULT_BAD_TEST_FEATURE_INDEX	= 0x07,
285 	UIC_CMD_RESULT_PEER_COMM_FAILURE	= 0x08,
286 	UIC_CMD_RESULT_BUSY			= 0x09,
287 	UIC_CMD_RESULT_DME_FAILURE		= 0x0A,
288 };
289 
290 #define MASK_UIC_COMMAND_RESULT			0xFF
291 
292 #define INT_AGGR_COUNTER_THLD_VAL(c)	(((c) & 0x1F) << 8)
293 #define INT_AGGR_TIMEOUT_VAL(t)		(((t) & 0xFF) << 0)
294 
295 /* Interrupt disable masks */
296 enum {
297 	/* Interrupt disable mask for UFSHCI v1.0 */
298 	INTERRUPT_MASK_ALL_VER_10	= 0x30FFF,
299 	INTERRUPT_MASK_RW_VER_10	= 0x30000,
300 
301 	/* Interrupt disable mask for UFSHCI v1.1 */
302 	INTERRUPT_MASK_ALL_VER_11	= 0x31FFF,
303 
304 	/* Interrupt disable mask for UFSHCI v2.1 */
305 	INTERRUPT_MASK_ALL_VER_21	= 0x71FFF,
306 };
307 
308 /* CCAP - Crypto Capability 100h */
309 union ufs_crypto_capabilities {
310 	__le32 reg_val;
311 	struct {
312 		u8 num_crypto_cap;
313 		u8 config_count;
314 		u8 reserved;
315 		u8 config_array_ptr;
316 	};
317 };
318 
319 enum ufs_crypto_key_size {
320 	UFS_CRYPTO_KEY_SIZE_INVALID	= 0x0,
321 	UFS_CRYPTO_KEY_SIZE_128		= 0x1,
322 	UFS_CRYPTO_KEY_SIZE_192		= 0x2,
323 	UFS_CRYPTO_KEY_SIZE_256		= 0x3,
324 	UFS_CRYPTO_KEY_SIZE_512		= 0x4,
325 };
326 
327 enum ufs_crypto_alg {
328 	UFS_CRYPTO_ALG_AES_XTS			= 0x0,
329 	UFS_CRYPTO_ALG_BITLOCKER_AES_CBC	= 0x1,
330 	UFS_CRYPTO_ALG_AES_ECB			= 0x2,
331 	UFS_CRYPTO_ALG_ESSIV_AES_CBC		= 0x3,
332 };
333 
334 /* x-CRYPTOCAP - Crypto Capability X */
335 union ufs_crypto_cap_entry {
336 	__le32 reg_val;
337 	struct {
338 		u8 algorithm_id;
339 		u8 sdus_mask; /* Supported data unit size mask */
340 		u8 key_size;
341 		u8 reserved;
342 	};
343 };
344 
345 #define UFS_CRYPTO_CONFIGURATION_ENABLE (1 << 7)
346 #define UFS_CRYPTO_KEY_MAX_SIZE 64
347 /* x-CRYPTOCFG - Crypto Configuration X */
348 union ufs_crypto_cfg_entry {
349 	__le32 reg_val[32];
350 	struct {
351 		u8 crypto_key[UFS_CRYPTO_KEY_MAX_SIZE];
352 		u8 data_unit_size;
353 		u8 crypto_cap_idx;
354 		u8 reserved_1;
355 		u8 config_enable;
356 		u8 reserved_multi_host;
357 		u8 reserved_2;
358 		u8 vsb[2];
359 		u8 reserved_3[56];
360 	};
361 };
362 
363 /*
364  * Request Descriptor Definitions
365  */
366 
367 /* Transfer request command type */
368 enum {
369 	UTP_CMD_TYPE_SCSI		= 0x0,
370 	UTP_CMD_TYPE_UFS		= 0x1,
371 	UTP_CMD_TYPE_DEV_MANAGE		= 0x2,
372 };
373 
374 /* To accommodate UFS2.0 required Command type */
375 enum {
376 	UTP_CMD_TYPE_UFS_STORAGE	= 0x1,
377 };
378 
379 enum {
380 	UTP_SCSI_COMMAND		= 0x00000000,
381 	UTP_NATIVE_UFS_COMMAND		= 0x10000000,
382 	UTP_DEVICE_MANAGEMENT_FUNCTION	= 0x20000000,
383 	UTP_REQ_DESC_INT_CMD		= 0x01000000,
384 	UTP_REQ_DESC_CRYPTO_ENABLE_CMD	= 0x00800000,
385 };
386 
387 /* UTP Transfer Request Data Direction (DD) */
388 enum {
389 	UTP_NO_DATA_TRANSFER	= 0x00000000,
390 	UTP_HOST_TO_DEVICE	= 0x02000000,
391 	UTP_DEVICE_TO_HOST	= 0x04000000,
392 };
393 
394 /* Overall command status values */
395 enum utp_ocs {
396 	OCS_SUCCESS			= 0x0,
397 	OCS_INVALID_CMD_TABLE_ATTR	= 0x1,
398 	OCS_INVALID_PRDT_ATTR		= 0x2,
399 	OCS_MISMATCH_DATA_BUF_SIZE	= 0x3,
400 	OCS_MISMATCH_RESP_UPIU_SIZE	= 0x4,
401 	OCS_PEER_COMM_FAILURE		= 0x5,
402 	OCS_ABORTED			= 0x6,
403 	OCS_FATAL_ERROR			= 0x7,
404 	OCS_DEVICE_FATAL_ERROR		= 0x8,
405 	OCS_INVALID_CRYPTO_CONFIG	= 0x9,
406 	OCS_GENERAL_CRYPTO_ERROR	= 0xA,
407 	OCS_INVALID_COMMAND_STATUS	= 0x0F,
408 };
409 
410 enum {
411 	MASK_OCS			= 0x0F,
412 };
413 
414 /* The maximum length of the data byte count field in the PRDT is 256KB */
415 #define PRDT_DATA_BYTE_COUNT_MAX	(256 * 1024)
416 /* The granularity of the data byte count field in the PRDT is 32-bit */
417 #define PRDT_DATA_BYTE_COUNT_PAD	4
418 
419 /**
420  * struct ufshcd_sg_entry - UFSHCI PRD Entry
421  * @addr: Physical address; DW-0 and DW-1.
422  * @reserved: Reserved for future use DW-2
423  * @size: size of physical segment DW-3
424  */
425 struct ufshcd_sg_entry {
426 	__le64    addr;
427 	__le32    reserved;
428 	__le32    size;
429 };
430 
431 /**
432  * struct utp_transfer_cmd_desc - UTP Command Descriptor (UCD)
433  * @command_upiu: Command UPIU Frame address
434  * @response_upiu: Response UPIU Frame address
435  * @prd_table: Physical Region Descriptor
436  */
437 struct utp_transfer_cmd_desc {
438 	u8 command_upiu[ALIGNED_UPIU_SIZE];
439 	u8 response_upiu[ALIGNED_UPIU_SIZE];
440 	struct ufshcd_sg_entry    prd_table[SG_ALL];
441 };
442 
443 /**
444  * struct request_desc_header - Descriptor Header common to both UTRD and UTMRD
445  * @dword0: Descriptor Header DW0
446  * @dword1: Descriptor Header DW1
447  * @dword2: Descriptor Header DW2
448  * @dword3: Descriptor Header DW3
449  */
450 struct request_desc_header {
451 	__le32 dword_0;
452 	__le32 dword_1;
453 	__le32 dword_2;
454 	__le32 dword_3;
455 };
456 
457 /**
458  * struct utp_transfer_req_desc - UTP Transfer Request Descriptor (UTRD)
459  * @header: UTRD header DW-0 to DW-3
460  * @command_desc_base_addr_lo: UCD base address low DW-4
461  * @command_desc_base_addr_hi: UCD base address high DW-5
462  * @response_upiu_length: response UPIU length DW-6
463  * @response_upiu_offset: response UPIU offset DW-6
464  * @prd_table_length: Physical region descriptor length DW-7
465  * @prd_table_offset: Physical region descriptor offset DW-7
466  */
467 struct utp_transfer_req_desc {
468 
469 	/* DW 0-3 */
470 	struct request_desc_header header;
471 
472 	/* DW 4-5*/
473 	__le32  command_desc_base_addr_lo;
474 	__le32  command_desc_base_addr_hi;
475 
476 	/* DW 6 */
477 	__le16  response_upiu_length;
478 	__le16  response_upiu_offset;
479 
480 	/* DW 7 */
481 	__le16  prd_table_length;
482 	__le16  prd_table_offset;
483 };
484 
485 /*
486  * UTMRD structure.
487  */
488 struct utp_task_req_desc {
489 	/* DW 0-3 */
490 	struct request_desc_header header;
491 
492 	/* DW 4-11 - Task request UPIU structure */
493 	struct {
494 		struct utp_upiu_header	req_header;
495 		__be32			input_param1;
496 		__be32			input_param2;
497 		__be32			input_param3;
498 		__be32			__reserved1[2];
499 	} upiu_req;
500 
501 	/* DW 12-19 - Task Management Response UPIU structure */
502 	struct {
503 		struct utp_upiu_header	rsp_header;
504 		__be32			output_param1;
505 		__be32			output_param2;
506 		__be32			__reserved2[3];
507 	} upiu_rsp;
508 };
509 
510 #endif /* End of Header */
511