xref: /linux/include/ufs/ufshci.h (revision 2a6edd867b155cb5c391a32a66ce7e5d2cdcb531)
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 <linux/types.h>
15 #include <ufs/ufs.h>
16 
17 enum {
18 	TASK_REQ_UPIU_SIZE_DWORDS	= 8,
19 	TASK_RSP_UPIU_SIZE_DWORDS	= 8,
20 	ALIGNED_UPIU_SIZE		= 512,
21 };
22 
23 /* UFSHCI Registers */
24 enum {
25 	REG_CONTROLLER_CAPABILITIES		= 0x00,
26 	REG_MCQCAP				= 0x04,
27 	REG_UFS_VERSION				= 0x08,
28 	REG_EXT_CONTROLLER_CAPABILITIES		= 0x0C,
29 	REG_CONTROLLER_PID			= 0x10,
30 	REG_CONTROLLER_MID			= 0x14,
31 	REG_AUTO_HIBERNATE_IDLE_TIMER		= 0x18,
32 	REG_INTERRUPT_STATUS			= 0x20,
33 	REG_INTERRUPT_ENABLE			= 0x24,
34 	REG_CONTROLLER_STATUS			= 0x30,
35 	REG_CONTROLLER_ENABLE			= 0x34,
36 	REG_UIC_ERROR_CODE_PHY_ADAPTER_LAYER	= 0x38,
37 	REG_UIC_ERROR_CODE_DATA_LINK_LAYER	= 0x3C,
38 	REG_UIC_ERROR_CODE_NETWORK_LAYER	= 0x40,
39 	REG_UIC_ERROR_CODE_TRANSPORT_LAYER	= 0x44,
40 	REG_UIC_ERROR_CODE_DME			= 0x48,
41 	REG_UTP_TRANSFER_REQ_INT_AGG_CONTROL	= 0x4C,
42 	REG_UTP_TRANSFER_REQ_LIST_BASE_L	= 0x50,
43 	REG_UTP_TRANSFER_REQ_LIST_BASE_H	= 0x54,
44 	REG_UTP_TRANSFER_REQ_DOOR_BELL		= 0x58,
45 	REG_UTP_TRANSFER_REQ_LIST_CLEAR		= 0x5C,
46 	REG_UTP_TRANSFER_REQ_LIST_RUN_STOP	= 0x60,
47 	REG_UTP_TASK_REQ_LIST_BASE_L		= 0x70,
48 	REG_UTP_TASK_REQ_LIST_BASE_H		= 0x74,
49 	REG_UTP_TASK_REQ_DOOR_BELL		= 0x78,
50 	REG_UTP_TASK_REQ_LIST_CLEAR		= 0x7C,
51 	REG_UTP_TASK_REQ_LIST_RUN_STOP		= 0x80,
52 	REG_UIC_COMMAND				= 0x90,
53 	REG_UIC_COMMAND_ARG_1			= 0x94,
54 	REG_UIC_COMMAND_ARG_2			= 0x98,
55 	REG_UIC_COMMAND_ARG_3			= 0x9C,
56 
57 	UFSHCI_REG_SPACE_SIZE			= 0xA0,
58 
59 	REG_UFS_CCAP				= 0x100,
60 	REG_UFS_CRYPTOCAP			= 0x104,
61 
62 	REG_UFS_MEM_CFG				= 0x300,
63 	REG_UFS_MCQ_CFG				= 0x380,
64 	REG_UFS_ESILBA				= 0x384,
65 	REG_UFS_ESIUBA				= 0x388,
66 	UFSHCI_CRYPTO_REG_SPACE_SIZE		= 0x400,
67 };
68 
69 /* Controller capability masks */
70 enum {
71 	MASK_TRANSFER_REQUESTS_SLOTS_SDB	= 0x0000001F,
72 	MASK_TRANSFER_REQUESTS_SLOTS_MCQ	= 0x000000FF,
73 	MASK_NUMBER_OUTSTANDING_RTT		= 0x0000FF00,
74 	MASK_TASK_MANAGEMENT_REQUEST_SLOTS	= 0x00070000,
75 	MASK_EHSLUTRD_SUPPORTED			= 0x00400000,
76 	MASK_AUTO_HIBERN8_SUPPORT		= 0x00800000,
77 	MASK_64_ADDRESSING_SUPPORT		= 0x01000000,
78 	MASK_OUT_OF_ORDER_DATA_DELIVERY_SUPPORT	= 0x02000000,
79 	MASK_UIC_DME_TEST_MODE_SUPPORT		= 0x04000000,
80 	MASK_CRYPTO_SUPPORT			= 0x10000000,
81 	MASK_LSDB_SUPPORT			= 0x20000000,
82 	MASK_MCQ_SUPPORT			= 0x40000000,
83 };
84 
85 enum {
86 	REG_SQATTR		= 0x0,
87 	REG_SQLBA		= 0x4,
88 	REG_SQUBA		= 0x8,
89 	REG_SQDAO		= 0xC,
90 	REG_SQISAO		= 0x10,
91 
92 	REG_CQATTR		= 0x20,
93 	REG_CQLBA		= 0x24,
94 	REG_CQUBA		= 0x28,
95 	REG_CQDAO		= 0x2C,
96 	REG_CQISAO		= 0x30,
97 };
98 
99 enum {
100 	REG_SQHP		= 0x0,
101 	REG_SQTP		= 0x4,
102 	REG_SQRTC		= 0x8,
103 	REG_SQCTI		= 0xC,
104 	REG_SQRTS		= 0x10,
105 };
106 
107 enum {
108 	REG_CQHP		= 0x0,
109 	REG_CQTP		= 0x4,
110 };
111 
112 enum {
113 	REG_CQIS		= 0x0,
114 	REG_CQIE		= 0x4,
115 };
116 
117 enum {
118 	SQ_START		= 0x0,
119 	SQ_STOP			= 0x1,
120 	SQ_ICU			= 0x2,
121 };
122 
123 enum {
124 	SQ_STS			= 0x1,
125 	SQ_CUS			= 0x2,
126 };
127 
128 #define SQ_ICU_ERR_CODE_MASK		GENMASK(7, 4)
129 #define UFS_MASK(mask, offset)		((mask) << (offset))
130 
131 /* UFS Version 08h */
132 #define MINOR_VERSION_NUM_MASK		UFS_MASK(0xFFFF, 0)
133 #define MAJOR_VERSION_NUM_MASK		UFS_MASK(0xFFFF, 16)
134 
135 #define UFSHCD_NUM_RESERVED	1
136 /*
137  * Controller UFSHCI version
138  * - 2.x and newer use the following scheme:
139  *   major << 8 + minor << 4
140  * - 1.x has been converted to match this in
141  *   ufshcd_get_ufs_version()
142  */
ufshci_version(u32 major,u32 minor)143 static inline u32 ufshci_version(u32 major, u32 minor)
144 {
145 	return (major << 8) + (minor << 4);
146 }
147 
148 /*
149  * HCDDID - Host Controller Identification Descriptor
150  *	  - Device ID and Device Class 10h
151  */
152 #define DEVICE_CLASS	UFS_MASK(0xFFFF, 0)
153 #define DEVICE_ID	UFS_MASK(0xFF, 24)
154 
155 /*
156  * HCPMID - Host Controller Identification Descriptor
157  *	  - Product/Manufacturer ID  14h
158  */
159 #define MANUFACTURE_ID_MASK	UFS_MASK(0xFFFF, 0)
160 #define PRODUCT_ID_MASK		UFS_MASK(0xFFFF, 16)
161 
162 /* AHIT - Auto-Hibernate Idle Timer */
163 #define UFSHCI_AHIBERN8_TIMER_MASK		GENMASK(9, 0)
164 #define UFSHCI_AHIBERN8_SCALE_MASK		GENMASK(12, 10)
165 #define UFSHCI_AHIBERN8_SCALE_FACTOR		10
166 #define UFSHCI_AHIBERN8_MAX			(1023 * 100000)
167 
168 /*
169  * IS - Interrupt Status - 20h
170  */
171 #define UTP_TRANSFER_REQ_COMPL			0x1
172 #define UIC_DME_END_PT_RESET			0x2
173 #define UIC_ERROR				0x4
174 #define UIC_TEST_MODE				0x8
175 #define UIC_POWER_MODE				0x10
176 #define UIC_HIBERNATE_EXIT			0x20
177 #define UIC_HIBERNATE_ENTER			0x40
178 #define UIC_LINK_LOST				0x80
179 #define UIC_LINK_STARTUP			0x100
180 #define UTP_TASK_REQ_COMPL			0x200
181 #define UIC_COMMAND_COMPL			0x400
182 #define DEVICE_FATAL_ERROR			0x800
183 #define UTP_ERROR				0x1000
184 #define CONTROLLER_FATAL_ERROR			0x10000
185 #define SYSTEM_BUS_FATAL_ERROR			0x20000
186 #define CRYPTO_ENGINE_FATAL_ERROR		0x40000
187 #define MCQ_CQ_EVENT_STATUS			0x100000
188 
189 #define UFSHCD_UIC_HIBERN8_MASK	(UIC_HIBERNATE_ENTER |\
190 				UIC_HIBERNATE_EXIT)
191 
192 #define UFSHCD_UIC_PWR_MASK	(UFSHCD_UIC_HIBERN8_MASK |\
193 				UIC_POWER_MODE)
194 
195 #define UFSHCD_UIC_MASK		(UIC_COMMAND_COMPL | UFSHCD_UIC_PWR_MASK)
196 
197 #define UFSHCD_ERROR_MASK	(UIC_ERROR | INT_FATAL_ERRORS)
198 
199 #define INT_FATAL_ERRORS	(DEVICE_FATAL_ERROR |\
200 				CONTROLLER_FATAL_ERROR |\
201 				SYSTEM_BUS_FATAL_ERROR |\
202 				CRYPTO_ENGINE_FATAL_ERROR |\
203 				UIC_LINK_LOST |\
204 				UTP_ERROR)
205 
206 /* HCS - Host Controller Status 30h */
207 #define DEVICE_PRESENT				0x1
208 #define UTP_TRANSFER_REQ_LIST_READY		0x2
209 #define UTP_TASK_REQ_LIST_READY			0x4
210 #define UIC_COMMAND_READY			0x8
211 #define HOST_ERROR_INDICATOR			0x10
212 #define DEVICE_ERROR_INDICATOR			0x20
213 #define UIC_POWER_MODE_CHANGE_REQ_STATUS_MASK	UFS_MASK(0x7, 8)
214 
215 #define UFSHCD_STATUS_READY	(UTP_TRANSFER_REQ_LIST_READY |\
216 				UTP_TASK_REQ_LIST_READY |\
217 				UIC_COMMAND_READY)
218 
219 enum {
220 	PWR_OK		= 0x0,
221 	PWR_LOCAL	= 0x01,
222 	PWR_REMOTE	= 0x02,
223 	PWR_BUSY	= 0x03,
224 	PWR_ERROR_CAP	= 0x04,
225 	PWR_FATAL_ERROR	= 0x05,
226 };
227 
228 /* HCE - Host Controller Enable 34h */
229 #define CONTROLLER_ENABLE	0x1
230 #define CONTROLLER_DISABLE	0x0
231 #define CRYPTO_GENERAL_ENABLE	0x2
232 
233 /* UECPA - Host UIC Error Code PHY Adapter Layer 38h */
234 #define UIC_PHY_ADAPTER_LAYER_ERROR			0x80000000
235 #define UIC_PHY_ADAPTER_LAYER_ERROR_CODE_MASK		0x1F
236 #define UIC_PHY_ADAPTER_LAYER_LANE_ERR_MASK		0xF
237 #define UIC_PHY_ADAPTER_LAYER_GENERIC_ERROR		0x10
238 
239 /* UECDL - Host UIC Error Code Data Link Layer 3Ch */
240 #define UIC_DATA_LINK_LAYER_ERROR		0x80000000
241 #define UIC_DATA_LINK_LAYER_ERROR_CODE_MASK	0xFFFF
242 #define UIC_DATA_LINK_LAYER_ERROR_TCX_REP_TIMER_EXP	0x2
243 #define UIC_DATA_LINK_LAYER_ERROR_AFCX_REQ_TIMER_EXP	0x4
244 #define UIC_DATA_LINK_LAYER_ERROR_FCX_PRO_TIMER_EXP	0x8
245 #define UIC_DATA_LINK_LAYER_ERROR_RX_BUF_OF	0x20
246 #define UIC_DATA_LINK_LAYER_ERROR_PA_INIT	0x2000
247 #define UIC_DATA_LINK_LAYER_ERROR_NAC_RECEIVED	0x0001
248 #define UIC_DATA_LINK_LAYER_ERROR_TCx_REPLAY_TIMEOUT 0x0002
249 
250 /* UECN - Host UIC Error Code Network Layer 40h */
251 #define UIC_NETWORK_LAYER_ERROR			0x80000000
252 #define UIC_NETWORK_LAYER_ERROR_CODE_MASK	0x7
253 #define UIC_NETWORK_UNSUPPORTED_HEADER_TYPE	0x1
254 #define UIC_NETWORK_BAD_DEVICEID_ENC		0x2
255 #define UIC_NETWORK_LHDR_TRAP_PACKET_DROPPING	0x4
256 
257 /* UECT - Host UIC Error Code Transport Layer 44h */
258 #define UIC_TRANSPORT_LAYER_ERROR		0x80000000
259 #define UIC_TRANSPORT_LAYER_ERROR_CODE_MASK	0x7F
260 #define UIC_TRANSPORT_UNSUPPORTED_HEADER_TYPE	0x1
261 #define UIC_TRANSPORT_UNKNOWN_CPORTID		0x2
262 #define UIC_TRANSPORT_NO_CONNECTION_RX		0x4
263 #define UIC_TRANSPORT_CONTROLLED_SEGMENT_DROPPING	0x8
264 #define UIC_TRANSPORT_BAD_TC			0x10
265 #define UIC_TRANSPORT_E2E_CREDIT_OVERFOW	0x20
266 #define UIC_TRANSPORT_SAFETY_VALUE_DROPPING	0x40
267 
268 /* UECDME - Host UIC Error Code DME 48h */
269 #define UIC_DME_ERROR			0x80000000
270 #define UIC_DME_ERROR_CODE_MASK		0x1
271 
272 /* UTRIACR - Interrupt Aggregation control register - 0x4Ch */
273 #define INT_AGGR_TIMEOUT_VAL_MASK		0xFF
274 #define INT_AGGR_COUNTER_THRESHOLD_MASK		UFS_MASK(0x1F, 8)
275 #define INT_AGGR_COUNTER_AND_TIMER_RESET	0x10000
276 #define INT_AGGR_STATUS_BIT			0x100000
277 #define INT_AGGR_PARAM_WRITE			0x1000000
278 #define INT_AGGR_ENABLE				0x80000000
279 
280 /* UTRLRSR - UTP Transfer Request Run-Stop Register 60h */
281 #define UTP_TRANSFER_REQ_LIST_RUN_STOP_BIT	0x1
282 
283 /* UTMRLRSR - UTP Task Management Request Run-Stop Register 80h */
284 #define UTP_TASK_REQ_LIST_RUN_STOP_BIT		0x1
285 
286 /* REG_UFS_MEM_CFG - Global Config Registers 300h */
287 #define MCQ_MODE_SELECT	BIT(0)
288 
289 /* CQISy - CQ y Interrupt Status Register  */
290 #define UFSHCD_MCQ_CQIS_TAIL_ENT_PUSH_STS	0x1
291 
292 /* UICCMD - UIC Command */
293 #define COMMAND_OPCODE_MASK		0xFF
294 #define GEN_SELECTOR_INDEX_MASK		0xFFFF
295 
296 #define MIB_ATTRIBUTE_MASK		UFS_MASK(0xFFFF, 16)
297 #define RESET_LEVEL			0xFF
298 
299 #define ATTR_SET_TYPE_MASK		UFS_MASK(0xFF, 16)
300 #define CONFIG_RESULT_CODE_MASK		0xFF
301 #define GENERIC_ERROR_CODE_MASK		0xFF
302 
303 /* GenSelectorIndex calculation macros for M-PHY attributes */
304 #define UIC_ARG_MPHY_TX_GEN_SEL_INDEX(lane) (lane)
305 #define UIC_ARG_MPHY_RX_GEN_SEL_INDEX(lane) (PA_MAXDATALANES + (lane))
306 
307 #define UIC_ARG_MIB_SEL(attr, sel)	((((attr) & 0xFFFF) << 16) |\
308 					 ((sel) & 0xFFFF))
309 #define UIC_ARG_MIB(attr)		UIC_ARG_MIB_SEL(attr, 0)
310 #define UIC_ARG_ATTR_TYPE(t)		(((t) & 0xFF) << 16)
311 #define UIC_GET_ATTR_ID(v)		(((v) >> 16) & 0xFFFF)
312 
313 /* Link Status*/
314 enum link_status {
315 	UFSHCD_LINK_IS_DOWN	= 1,
316 	UFSHCD_LINK_IS_UP	= 2,
317 };
318 
319 /* UIC Commands */
320 enum uic_cmd_dme {
321 	UIC_CMD_DME_GET			= 0x01,
322 	UIC_CMD_DME_SET			= 0x02,
323 	UIC_CMD_DME_PEER_GET		= 0x03,
324 	UIC_CMD_DME_PEER_SET		= 0x04,
325 	UIC_CMD_DME_POWERON		= 0x10,
326 	UIC_CMD_DME_POWEROFF		= 0x11,
327 	UIC_CMD_DME_ENABLE		= 0x12,
328 	UIC_CMD_DME_RESET		= 0x14,
329 	UIC_CMD_DME_END_PT_RST		= 0x15,
330 	UIC_CMD_DME_LINK_STARTUP	= 0x16,
331 	UIC_CMD_DME_HIBER_ENTER		= 0x17,
332 	UIC_CMD_DME_HIBER_EXIT		= 0x18,
333 	UIC_CMD_DME_TEST_MODE		= 0x1A,
334 };
335 
336 /* UIC Config result code / Generic error code */
337 enum {
338 	UIC_CMD_RESULT_SUCCESS			= 0x00,
339 	UIC_CMD_RESULT_INVALID_ATTR		= 0x01,
340 	UIC_CMD_RESULT_FAILURE			= 0x01,
341 	UIC_CMD_RESULT_INVALID_ATTR_VALUE	= 0x02,
342 	UIC_CMD_RESULT_READ_ONLY_ATTR		= 0x03,
343 	UIC_CMD_RESULT_WRITE_ONLY_ATTR		= 0x04,
344 	UIC_CMD_RESULT_BAD_INDEX		= 0x05,
345 	UIC_CMD_RESULT_LOCKED_ATTR		= 0x06,
346 	UIC_CMD_RESULT_BAD_TEST_FEATURE_INDEX	= 0x07,
347 	UIC_CMD_RESULT_PEER_COMM_FAILURE	= 0x08,
348 	UIC_CMD_RESULT_BUSY			= 0x09,
349 	UIC_CMD_RESULT_DME_FAILURE		= 0x0A,
350 };
351 
352 #define MASK_UIC_COMMAND_RESULT			0xFF
353 
354 #define INT_AGGR_COUNTER_THLD_VAL(c)	(((c) & 0x1F) << 8)
355 #define INT_AGGR_TIMEOUT_VAL(t)		(((t) & 0xFF) << 0)
356 
357 /* Interrupt disable masks */
358 enum {
359 	/* Interrupt disable mask for UFSHCI v1.1 */
360 	INTERRUPT_MASK_ALL_VER_11       = 0x31FFF,
361 
362 	/* Interrupt disable mask for UFSHCI v2.1 */
363 	INTERRUPT_MASK_ALL_VER_21	= 0x71FFF,
364 };
365 
366 /* CCAP - Crypto Capability 100h */
367 union ufs_crypto_capabilities {
368 	__le32 reg_val;
369 	struct {
370 		u8 num_crypto_cap;
371 		u8 config_count;
372 		u8 reserved;
373 		u8 config_array_ptr;
374 	};
375 };
376 
377 enum ufs_crypto_key_size {
378 	UFS_CRYPTO_KEY_SIZE_INVALID	= 0x0,
379 	UFS_CRYPTO_KEY_SIZE_128		= 0x1,
380 	UFS_CRYPTO_KEY_SIZE_192		= 0x2,
381 	UFS_CRYPTO_KEY_SIZE_256		= 0x3,
382 	UFS_CRYPTO_KEY_SIZE_512		= 0x4,
383 };
384 
385 enum ufs_crypto_alg {
386 	UFS_CRYPTO_ALG_AES_XTS			= 0x0,
387 	UFS_CRYPTO_ALG_BITLOCKER_AES_CBC	= 0x1,
388 	UFS_CRYPTO_ALG_AES_ECB			= 0x2,
389 	UFS_CRYPTO_ALG_ESSIV_AES_CBC		= 0x3,
390 };
391 
392 /* x-CRYPTOCAP - Crypto Capability X */
393 union ufs_crypto_cap_entry {
394 	__le32 reg_val;
395 	struct {
396 		u8 algorithm_id;
397 		u8 sdus_mask; /* Supported data unit size mask */
398 		u8 key_size;
399 		u8 reserved;
400 	};
401 };
402 
403 #define UFS_CRYPTO_CONFIGURATION_ENABLE (1 << 7)
404 #define UFS_CRYPTO_KEY_MAX_SIZE 64
405 /* x-CRYPTOCFG - Crypto Configuration X */
406 union ufs_crypto_cfg_entry {
407 	__le32 reg_val[32];
408 	struct {
409 		u8 crypto_key[UFS_CRYPTO_KEY_MAX_SIZE];
410 		u8 data_unit_size;
411 		u8 crypto_cap_idx;
412 		u8 reserved_1;
413 		u8 config_enable;
414 		u8 reserved_multi_host;
415 		u8 reserved_2;
416 		u8 vsb[2];
417 		u8 reserved_3[56];
418 	};
419 };
420 
421 /*
422  * Request Descriptor Definitions
423  */
424 
425 /* To accommodate UFS2.0 required Command type */
426 enum {
427 	UTP_CMD_TYPE_UFS_STORAGE	= 0x1,
428 };
429 
430 enum {
431 	UTP_SCSI_COMMAND		= 0x00000000,
432 	UTP_NATIVE_UFS_COMMAND		= 0x10000000,
433 	UTP_DEVICE_MANAGEMENT_FUNCTION	= 0x20000000,
434 };
435 
436 /* UTP Transfer Request Data Direction (DD) */
437 enum utp_data_direction {
438 	UTP_NO_DATA_TRANSFER	= 0,
439 	UTP_HOST_TO_DEVICE	= 1,
440 	UTP_DEVICE_TO_HOST	= 2,
441 };
442 
443 /* Overall command status values */
444 enum utp_ocs {
445 	OCS_SUCCESS			= 0x0,
446 	OCS_INVALID_CMD_TABLE_ATTR	= 0x1,
447 	OCS_INVALID_PRDT_ATTR		= 0x2,
448 	OCS_MISMATCH_DATA_BUF_SIZE	= 0x3,
449 	OCS_MISMATCH_RESP_UPIU_SIZE	= 0x4,
450 	OCS_PEER_COMM_FAILURE		= 0x5,
451 	OCS_ABORTED			= 0x6,
452 	OCS_FATAL_ERROR			= 0x7,
453 	OCS_DEVICE_FATAL_ERROR		= 0x8,
454 	OCS_INVALID_CRYPTO_CONFIG	= 0x9,
455 	OCS_GENERAL_CRYPTO_ERROR	= 0xA,
456 	OCS_INVALID_COMMAND_STATUS	= 0x0F,
457 };
458 
459 enum {
460 	MASK_OCS			= 0x0F,
461 };
462 
463 /* The maximum length of the data byte count field in the PRDT is 256KB */
464 #define PRDT_DATA_BYTE_COUNT_MAX	SZ_256K
465 /* The granularity of the data byte count field in the PRDT is 32-bit */
466 #define PRDT_DATA_BYTE_COUNT_PAD	4
467 
468 /**
469  * struct ufshcd_sg_entry - UFSHCI PRD Entry
470  * @addr: Physical address; DW-0 and DW-1.
471  * @reserved: Reserved for future use DW-2
472  * @size: size of physical segment DW-3
473  */
474 struct ufshcd_sg_entry {
475 	__le64    addr;
476 	__le32    reserved;
477 	__le32    size;
478 	/*
479 	 * followed by variant-specific fields if
480 	 * CONFIG_SCSI_UFS_VARIABLE_SG_ENTRY_SIZE has been defined.
481 	 */
482 };
483 
484 /**
485  * struct utp_transfer_cmd_desc - UTP Command Descriptor (UCD)
486  * @command_upiu: Command UPIU Frame address
487  * @response_upiu: Response UPIU Frame address
488  * @prd_table: Physical Region Descriptor: an array of SG_ALL struct
489  *	ufshcd_sg_entry's.  Variant-specific fields may be present after each.
490  */
491 struct utp_transfer_cmd_desc {
492 	u8 command_upiu[ALIGNED_UPIU_SIZE];
493 	u8 response_upiu[ALIGNED_UPIU_SIZE];
494 	u8 prd_table[];
495 };
496 
497 /**
498  * struct request_desc_header - Descriptor Header common to both UTRD and UTMRD
499  */
500 struct request_desc_header {
501 	u8 cci;
502 	u8 ehs_length;
503 #if defined(__BIG_ENDIAN)
504 	u8 enable_crypto:1;
505 	u8 reserved2:7;
506 
507 	u8 command_type:4;
508 	u8 reserved1:1;
509 	u8 data_direction:2;
510 	u8 interrupt:1;
511 #elif defined(__LITTLE_ENDIAN)
512 	u8 reserved2:7;
513 	u8 enable_crypto:1;
514 
515 	u8 interrupt:1;
516 	u8 data_direction:2;
517 	u8 reserved1:1;
518 	u8 command_type:4;
519 #else
520 #error
521 #endif
522 
523 	__le32 dunl;
524 	u8 ocs;
525 	u8 cds;
526 	__le16 ldbc;
527 	__le32 dunu;
528 };
529 
530 static_assert(sizeof(struct request_desc_header) == 16);
531 
532 /**
533  * struct utp_transfer_req_desc - UTP Transfer Request Descriptor (UTRD)
534  * @header: UTRD header DW-0 to DW-3
535  * @command_desc_base_addr: UCD base address DW 4-5
536  * @response_upiu_length: response UPIU length DW-6
537  * @response_upiu_offset: response UPIU offset DW-6
538  * @prd_table_length: Physical region descriptor length DW-7
539  * @prd_table_offset: Physical region descriptor offset DW-7
540  */
541 struct utp_transfer_req_desc {
542 
543 	/* DW 0-3 */
544 	struct request_desc_header header;
545 
546 	/* DW 4-5*/
547 	__le64  command_desc_base_addr;
548 
549 	/* DW 6 */
550 	__le16  response_upiu_length;
551 	__le16  response_upiu_offset;
552 
553 	/* DW 7 */
554 	__le16  prd_table_length;
555 	__le16  prd_table_offset;
556 };
557 
558 /* MCQ Completion Queue Entry */
559 struct cq_entry {
560 	/* DW 0-1 */
561 	__le64 command_desc_base_addr;
562 
563 	/* DW 2 */
564 	__le16  response_upiu_length;
565 	__le16  response_upiu_offset;
566 
567 	/* DW 3 */
568 	__le16  prd_table_length;
569 	__le16  prd_table_offset;
570 
571 	/* DW 4 */
572 	__le32 status;
573 
574 	/* DW 5-7 */
575 	__le32 reserved[3];
576 };
577 
578 static_assert(sizeof(struct cq_entry) == 32);
579 
580 /*
581  * UTMRD structure.
582  */
583 struct utp_task_req_desc {
584 	/* DW 0-3 */
585 	struct request_desc_header header;
586 
587 	/* DW 4-11 - Task request UPIU structure */
588 	struct {
589 		struct utp_upiu_header	req_header;
590 		__be32			input_param1;
591 		__be32			input_param2;
592 		__be32			input_param3;
593 		__be32			__reserved1[2];
594 	} upiu_req;
595 
596 	/* DW 12-19 - Task Management Response UPIU structure */
597 	struct {
598 		struct utp_upiu_header	rsp_header;
599 		__be32			output_param1;
600 		__be32			output_param2;
601 		__be32			__reserved2[3];
602 	} upiu_rsp;
603 };
604 
605 #endif /* End of Header */
606