drivers/scsi/ufs/ufs.h

   1 /*
   2  * Universal Flash Storage Host controller driver
   3  *
   4  * This code is based on drivers/scsi/ufs/ufs.h
   5  * Copyright (C) 2011-2013 Samsung India Software Operations
   6  *
   7  * Authors:
   8  *      Santosh Yaraganavi <santosh.sy@samsung.com>
   9  *      Vinayak Holikatti <h.vinayak@samsung.com>
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  * See the COPYING file in the top-level directory or visit
  16  * <http://www.gnu.org/licenses/gpl-2.0.html>
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * This program is provided "AS IS" and "WITH ALL FAULTS" and
  24  * without warranty of any kind. You are solely responsible for
  25  * determining the appropriateness of using and distributing
  26  * the program and assume all risks associated with your exercise
  27  * of rights with respect to the program, including but not limited
  28  * to infringement of third party rights, the risks and costs of
  29  * program errors, damage to or loss of data, programs or equipment,
  30  * and unavailability or interruption of operations. Under no
  31  * circumstances will the contributor of this Program be liable for
  32  * any damages of any kind arising from your use or distribution of
  33  * this program.
  34  */
  35
  36 #ifndef _UFS_H
  37 #define _UFS_H
  38
  39 #include <linux/mutex.h>
  40 #include <linux/types.h>
  41
  42 #define MAX_CDB_SIZE    16
  43 #define GENERAL_UPIU_REQUEST_SIZE 32
  44 #define QUERY_DESC_MAX_SIZE       256
  45 #define QUERY_OSF_SIZE            (GENERAL_UPIU_REQUEST_SIZE - \
  46                                         (sizeof(struct utp_upiu_header)))
  47
  48 #define UPIU_HEADER_DWORD(byte3, byte2, byte1, byte0)\
  49                         cpu_to_be32((byte3 << 24) | (byte2 << 16) |\
  50                          (byte1 << 8) | (byte0))
  51
  52 /*
  53  * UFS Protocol Information Unit related definitions
  54  */
  55
  56 /* Task management functions */
  57 enum {
  58         UFS_ABORT_TASK          = 0x01,
  59         UFS_ABORT_TASK_SET      = 0x02,
  60         UFS_CLEAR_TASK_SET      = 0x04,
  61         UFS_LOGICAL_RESET       = 0x08,
  62         UFS_QUERY_TASK          = 0x80,
  63         UFS_QUERY_TASK_SET      = 0x81,
  64 };
  65
  66 /* UTP UPIU Transaction Codes Initiator to Target */
  67 enum {
  68         UPIU_TRANSACTION_NOP_OUT        = 0x00,
  69         UPIU_TRANSACTION_COMMAND        = 0x01,
  70         UPIU_TRANSACTION_DATA_OUT       = 0x02,
  71         UPIU_TRANSACTION_TASK_REQ       = 0x04,
  72         UPIU_TRANSACTION_QUERY_REQ      = 0x16,
  73 };
  74
  75 /* UTP UPIU Transaction Codes Target to Initiator */
  76 enum {
  77         UPIU_TRANSACTION_NOP_IN         = 0x20,
  78         UPIU_TRANSACTION_RESPONSE       = 0x21,
  79         UPIU_TRANSACTION_DATA_IN        = 0x22,
  80         UPIU_TRANSACTION_TASK_RSP       = 0x24,
  81         UPIU_TRANSACTION_READY_XFER     = 0x31,
  82         UPIU_TRANSACTION_QUERY_RSP      = 0x36,
  83         UPIU_TRANSACTION_REJECT_UPIU    = 0x3F,
  84 };
  85
  86 /* UPIU Read/Write flags */
  87 enum {
  88         UPIU_CMD_FLAGS_NONE     = 0x00,
  89         UPIU_CMD_FLAGS_WRITE    = 0x20,
  90         UPIU_CMD_FLAGS_READ     = 0x40,
  91 };
  92
  93 /* UPIU Task Attributes */
  94 enum {
  95         UPIU_TASK_ATTR_SIMPLE   = 0x00,
  96         UPIU_TASK_ATTR_ORDERED  = 0x01,
  97         UPIU_TASK_ATTR_HEADQ    = 0x02,
  98         UPIU_TASK_ATTR_ACA      = 0x03,
  99 };
 100
 101 /* UPIU Query request function */
 102 enum {
 103         UPIU_QUERY_FUNC_STANDARD_READ_REQUEST           = 0x01,
 104         UPIU_QUERY_FUNC_STANDARD_WRITE_REQUEST          = 0x81,
 105 };
 106
 107 /* Flag idn for Query Requests*/
 108 enum flag_idn {
 109         QUERY_FLAG_IDN_FDEVICEINIT      = 0x01,
 110         QUERY_FLAG_IDN_BKOPS_EN         = 0x04,
 111 };
 112
 113 /* Attribute idn for Query requests */
 114 enum attr_idn {
 115         QUERY_ATTR_IDN_BKOPS_STATUS     = 0x05,
 116         QUERY_ATTR_IDN_EE_CONTROL       = 0x0D,
 117         QUERY_ATTR_IDN_EE_STATUS        = 0x0E,
 118 };
 119
 120 /* Exception event mask values */
 121 enum {
 122         MASK_EE_STATUS          = 0xFFFF,
 123         MASK_EE_URGENT_BKOPS    = (1 << 2),
 124 };
 125
 126 /* Background operation status */
 127 enum {
 128         BKOPS_STATUS_NO_OP               = 0x0,
 129         BKOPS_STATUS_NON_CRITICAL        = 0x1,
 130         BKOPS_STATUS_PERF_IMPACT         = 0x2,
 131         BKOPS_STATUS_CRITICAL            = 0x3,
 132 };
 133
 134 /* UTP QUERY Transaction Specific Fields OpCode */
 135 enum query_opcode {
 136         UPIU_QUERY_OPCODE_NOP           = 0x0,
 137         UPIU_QUERY_OPCODE_READ_DESC     = 0x1,
 138         UPIU_QUERY_OPCODE_WRITE_DESC    = 0x2,
 139         UPIU_QUERY_OPCODE_READ_ATTR     = 0x3,
 140         UPIU_QUERY_OPCODE_WRITE_ATTR    = 0x4,
 141         UPIU_QUERY_OPCODE_READ_FLAG     = 0x5,
 142         UPIU_QUERY_OPCODE_SET_FLAG      = 0x6,
 143         UPIU_QUERY_OPCODE_CLEAR_FLAG    = 0x7,
 144         UPIU_QUERY_OPCODE_TOGGLE_FLAG   = 0x8,
 145 };
 146
 147 /* Query response result code */
 148 enum {
 149         QUERY_RESULT_SUCCESS                    = 0x00,
 150         QUERY_RESULT_NOT_READABLE               = 0xF6,
 151         QUERY_RESULT_NOT_WRITEABLE              = 0xF7,
 152         QUERY_RESULT_ALREADY_WRITTEN            = 0xF8,
 153         QUERY_RESULT_INVALID_LENGTH             = 0xF9,
 154         QUERY_RESULT_INVALID_VALUE              = 0xFA,
 155         QUERY_RESULT_INVALID_SELECTOR           = 0xFB,
 156         QUERY_RESULT_INVALID_INDEX              = 0xFC,
 157         QUERY_RESULT_INVALID_IDN                = 0xFD,
 158         QUERY_RESULT_INVALID_OPCODE             = 0xFE,
 159         QUERY_RESULT_GENERAL_FAILURE            = 0xFF,
 160 };
 161
 162 /* UTP Transfer Request Command Type (CT) */
 163 enum {
 164         UPIU_COMMAND_SET_TYPE_SCSI      = 0x0,
 165         UPIU_COMMAND_SET_TYPE_UFS       = 0x1,
 166         UPIU_COMMAND_SET_TYPE_QUERY     = 0x2,
 167 };
 168
 169 /* UTP Transfer Request Command Offset */
 170 #define UPIU_COMMAND_TYPE_OFFSET        28
 171
 172 /* Offset of the response code in the UPIU header */
 173 #define UPIU_RSP_CODE_OFFSET            8
 174
 175 enum {
 176         MASK_SCSI_STATUS                = 0xFF,
 177         MASK_TASK_RESPONSE              = 0xFF00,
 178         MASK_RSP_UPIU_RESULT            = 0xFFFF,
 179         MASK_QUERY_DATA_SEG_LEN         = 0xFFFF,
 180         MASK_RSP_UPIU_DATA_SEG_LEN      = 0xFFFF,
 181         MASK_RSP_EXCEPTION_EVENT        = 0x10000,
 182 };
 183
 184 /* Task management service response */
 185 enum {
 186         UPIU_TASK_MANAGEMENT_FUNC_COMPL         = 0x00,
 187         UPIU_TASK_MANAGEMENT_FUNC_NOT_SUPPORTED = 0x04,
 188         UPIU_TASK_MANAGEMENT_FUNC_SUCCEEDED     = 0x08,
 189         UPIU_TASK_MANAGEMENT_FUNC_FAILED        = 0x05,
 190         UPIU_INCORRECT_LOGICAL_UNIT_NO          = 0x09,
 191 };
 192 /**
 193  * struct utp_upiu_header - UPIU header structure
 194  * @dword_0: UPIU header DW-0
 195  * @dword_1: UPIU header DW-1
 196  * @dword_2: UPIU header DW-2
 197  */
 198 struct utp_upiu_header {
 199         u32 dword_0;
 200         u32 dword_1;
 201         u32 dword_2;
 202 };
 203
 204 /**
 205  * struct utp_upiu_cmd - Command UPIU structure
 206  * @data_transfer_len: Data Transfer Length DW-3
 207  * @cdb: Command Descriptor Block CDB DW-4 to DW-7
 208  */
 209 struct utp_upiu_cmd {
 210         u32 exp_data_transfer_len;
 211         u8 cdb[MAX_CDB_SIZE];
 212 };
 213
 214 /**
 215  * struct utp_upiu_query - upiu request buffer structure for
 216  * query request.
 217  * @opcode: command to perform B-0
 218  * @idn: a value that indicates the particular type of data B-1
 219  * @index: Index to further identify data B-2
 220  * @selector: Index to further identify data B-3
 221  * @reserved_osf: spec reserved field B-4,5
 222  * @length: number of descriptor bytes to read/write B-6,7
 223  * @value: Attribute value to be written DW-5
 224  * @reserved: spec reserved DW-6,7
 225  */
 226 struct utp_upiu_query {
 227         u8 opcode;
 228         u8 idn;
 229         u8 index;
 230         u8 selector;
 231         u16 reserved_osf;
 232         u16 length;
 233         u32 value;
 234         u32 reserved[2];
 235 };
 236
 237 /**
 238  * struct utp_upiu_req - general upiu request structure
 239  * @header:UPIU header structure DW-0 to DW-2
 240  * @sc: fields structure for scsi command DW-3 to DW-7
 241  * @qr: fields structure for query request DW-3 to DW-7
 242  */
 243 struct utp_upiu_req {
 244         struct utp_upiu_header header;
 245         union {
 246                 struct utp_upiu_cmd sc;
 247                 struct utp_upiu_query qr;
 248         };
 249 };
 250
 251 /**
 252  * struct utp_cmd_rsp - Response UPIU structure
 253  * @residual_transfer_count: Residual transfer count DW-3
 254  * @reserved: Reserved double words DW-4 to DW-7
 255  * @sense_data_len: Sense data length DW-8 U16
 256  * @sense_data: Sense data field DW-8 to DW-12
 257  */
 258 struct utp_cmd_rsp {
 259         u32 residual_transfer_count;
 260         u32 reserved[4];
 261         u16 sense_data_len;
 262         u8 sense_data[18];
 263 };
 264
 265 /**
 266  * struct utp_upiu_rsp - general upiu response structure
 267  * @header: UPIU header structure DW-0 to DW-2
 268  * @sr: fields structure for scsi command DW-3 to DW-12
 269  * @qr: fields structure for query request DW-3 to DW-7
 270  */
 271 struct utp_upiu_rsp {
 272         struct utp_upiu_header header;
 273         union {
 274                 struct utp_cmd_rsp sr;
 275                 struct utp_upiu_query qr;
 276         };
 277 };
 278
 279 /**
 280  * struct utp_upiu_task_req - Task request UPIU structure
 281  * @header - UPIU header structure DW0 to DW-2
 282  * @input_param1: Input parameter 1 DW-3
 283  * @input_param2: Input parameter 2 DW-4
 284  * @input_param3: Input parameter 3 DW-5
 285  * @reserved: Reserved double words DW-6 to DW-7
 286  */
 287 struct utp_upiu_task_req {
 288         struct utp_upiu_header header;
 289         u32 input_param1;
 290         u32 input_param2;
 291         u32 input_param3;
 292         u32 reserved[2];
 293 };
 294
 295 /**
 296  * struct utp_upiu_task_rsp - Task Management Response UPIU structure
 297  * @header: UPIU header structure DW0-DW-2
 298  * @output_param1: Ouput parameter 1 DW3
 299  * @output_param2: Output parameter 2 DW4
 300  * @reserved: Reserved double words DW-5 to DW-7
 301  */
 302 struct utp_upiu_task_rsp {
 303         struct utp_upiu_header header;
 304         u32 output_param1;
 305         u32 output_param2;
 306         u32 reserved[3];
 307 };
 308
 309 /**
 310  * struct ufs_query_req - parameters for building a query request
 311  * @query_func: UPIU header query function
 312  * @upiu_req: the query request data
 313  */
 314 struct ufs_query_req {
 315         u8 query_func;
 316         struct utp_upiu_query upiu_req;
 317 };
 318
 319 /**
 320  * struct ufs_query_resp - UPIU QUERY
 321  * @response: device response code
 322  * @upiu_res: query response data
 323  */
 324 struct ufs_query_res {
 325         u8 response;
 326         struct utp_upiu_query upiu_res;
 327 };
 328
 329 #endif /* End of Header */