drivers/scsi/constants.c - kernel/msm-4.9 - Gitiles

 /*
  * ASCII values for a number of symbolic constants, printing functions,
  * etc.
  * Additions for SCSI 2 and Linux 2.2.x by D. Gilbert (990422)
  * Additions for SCSI 3+ (SPC-3 T10/1416-D Rev 07 3 May 2002)
  *   by D. Gilbert and aeb (20020609)
  * Updated to SPC-4 T10/1713-D Rev 36g, D. Gilbert 20130701
  */

 #include <linux/blkdev.h>
 #include <linux/module.h>
 #include <linux/kernel.h>

 #include <scsi/scsi.h>
 #include <scsi/scsi_cmnd.h>
 #include <scsi/scsi_device.h>
 #include <scsi/scsi_host.h>
 #include <scsi/scsi_eh.h>
 #include <scsi/scsi_dbg.h>

 /* Commands with service actions that change the command name */
 #define THIRD_PARTY_COPY_OUT 0x83
 #define THIRD_PARTY_COPY_IN 0x84

 struct sa_name_list {
 	int opcode;
 	const struct value_name_pair *arr;
 	int arr_sz;
 };

 struct value_name_pair {
 	int value;
 	const char * name;
 };

 static const char * cdb_byte0_names[] = {
 /* 00-03 */ "Test Unit Ready", "Rezero Unit/Rewind", NULL, "Request Sense",
 /* 04-07 */ "Format Unit/Medium", "Read Block Limits", NULL,
 	    "Reassign Blocks",
 /* 08-0d */ "Read(6)", NULL, "Write(6)", "Seek(6)", NULL, NULL,
 /* 0e-12 */ NULL, "Read Reverse", "Write Filemarks", "Space", "Inquiry",
 /* 13-16 */ "Verify(6)", "Recover Buffered Data", "Mode Select(6)",
 	    "Reserve(6)",
 /* 17-1a */ "Release(6)", "Copy", "Erase", "Mode Sense(6)",
 /* 1b-1d */ "Start/Stop Unit", "Receive Diagnostic", "Send Diagnostic",
 /* 1e-1f */ "Prevent/Allow Medium Removal", NULL,
 /* 20-22 */  NULL, NULL, NULL,
 /* 23-28 */ "Read Format Capacities", "Set Window",
 	    "Read Capacity(10)", NULL, NULL, "Read(10)",
 /* 29-2d */ "Read Generation", "Write(10)", "Seek(10)", "Erase(10)",
             "Read updated block",
 /* 2e-31 */ "Write Verify(10)", "Verify(10)", "Search High", "Search Equal",
 /* 32-34 */ "Search Low", "Set Limits", "Prefetch/Read Position",
 /* 35-37 */ "Synchronize Cache(10)", "Lock/Unlock Cache(10)",
 	    "Read Defect Data(10)",
 /* 38-3c */ "Medium Scan", "Compare", "Copy Verify", "Write Buffer",
 	    "Read Buffer",
 /* 3d-3f */ "Update Block", "Read Long(10)",  "Write Long(10)",
 /* 40-41 */ "Change Definition", "Write Same(10)",
 /* 42-48 */ "Unmap/Read sub-channel", "Read TOC/PMA/ATIP",
 	    "Read density support", "Play audio(10)", "Get configuration",
 	    "Play audio msf", "Sanitize/Play audio track/index",
 /* 49-4f */ "Play track relative(10)", "Get event status notification",
             "Pause/resume", "Log Select", "Log Sense", "Stop play/scan",
             NULL,
 /* 50-55 */ "Xdwrite", "Xpwrite, Read disk info", "Xdread, Read track info",
             "Reserve track", "Send OPC info", "Mode Select(10)",
 /* 56-5b */ "Reserve(10)", "Release(10)", "Repair track", "Read master cue",
             "Mode Sense(10)", "Close track/session",
 /* 5c-5f */ "Read buffer capacity", "Send cue sheet", "Persistent reserve in",
             "Persistent reserve out",
 /* 60-67 */ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 /* 68-6f */ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 /* 70-77 */ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 /* 78-7f */ NULL, NULL, NULL, NULL, NULL, NULL, "Extended CDB",
 	    "Variable length",
 /* 80-84 */ "Xdwrite(16)", "Rebuild(16)", "Regenerate(16)",
 	    "Third party copy out", "Third party copy in",
 /* 85-89 */ "ATA command pass through(16)", "Access control in",
 	    "Access control out", "Read(16)", "Compare and Write",
 /* 8a-8f */ "Write(16)", "ORWrite", "Read attributes", "Write attributes",
             "Write and verify(16)", "Verify(16)",
 /* 90-94 */ "Pre-fetch(16)", "Synchronize cache(16)",
             "Lock/unlock cache(16)", "Write same(16)", NULL,
 /* 95-99 */ NULL, NULL, NULL, NULL, NULL,
 /* 9a-9f */ NULL, NULL, NULL, "Service action bidirectional",
 	    "Service action in(16)", "Service action out(16)",
 /* a0-a5 */ "Report luns", "ATA command pass through(12)/Blank",
             "Security protocol in", "Maintenance in", "Maintenance out",
 	    "Move medium/play audio(12)",
 /* a6-a9 */ "Exchange medium", "Move medium attached", "Read(12)",
             "Play track relative(12)",
 /* aa-ae */ "Write(12)", NULL, "Erase(12), Get Performance",
             "Read DVD structure", "Write and verify(12)",
 /* af-b1 */ "Verify(12)", "Search data high(12)", "Search data equal(12)",
 /* b2-b4 */ "Search data low(12)", "Set limits(12)",
             "Read element status attached",
 /* b5-b6 */ "Security protocol out", "Send volume tag, set streaming",
 /* b7-b9 */ "Read defect data(12)", "Read element status", "Read CD msf",
 /* ba-bc */ "Redundancy group (in), Scan",
             "Redundancy group (out), Set cd-rom speed", "Spare (in), Play cd",
 /* bd-bf */ "Spare (out), Mechanism status", "Volume set (in), Read cd",
             "Volume set (out), Send DVD structure",
 };

 static const struct value_name_pair maint_in_arr[] = {
 	{0x5, "Report identifying information"},
 	{0xa, "Report target port groups"},
 	{0xb, "Report aliases"},
 	{0xc, "Report supported operation codes"},
 	{0xd, "Report supported task management functions"},
 	{0xe, "Report priority"},
 	{0xf, "Report timestamp"},
 	{0x10, "Management protocol in"},
 };
 #define MAINT_IN_SZ ARRAY_SIZE(maint_in_arr)

 static const struct value_name_pair maint_out_arr[] = {
 	{0x6, "Set identifying information"},
 	{0xa, "Set target port groups"},
 	{0xb, "Change aliases"},
 	{0xc, "Remove I_T nexus"},
 	{0xe, "Set priority"},
 	{0xf, "Set timestamp"},
 	{0x10, "Management protocol out"},
 };
 #define MAINT_OUT_SZ ARRAY_SIZE(maint_out_arr)

 static const struct value_name_pair serv_in12_arr[] = {
 	{0x1, "Read media serial number"},
 };
 #define SERV_IN12_SZ ARRAY_SIZE(serv_in12_arr)

 static const struct value_name_pair serv_out12_arr[] = {
 	{-1, "dummy entry"},
 };
 #define SERV_OUT12_SZ ARRAY_SIZE(serv_out12_arr)

 static const struct value_name_pair serv_bidi_arr[] = {
 	{-1, "dummy entry"},
 };
 #define SERV_BIDI_SZ ARRAY_SIZE(serv_bidi_arr)

 static const struct value_name_pair serv_in16_arr[] = {
 	{0x10, "Read capacity(16)"},
 	{0x11, "Read long(16)"},
 	{0x12, "Get LBA status"},
 	{0x13, "Report referrals"},
 };
 #define SERV_IN16_SZ ARRAY_SIZE(serv_in16_arr)

 static const struct value_name_pair serv_out16_arr[] = {
 	{0x11, "Write long(16)"},
 	{0x1f, "Notify data transfer device(16)"},
 };
 #define SERV_OUT16_SZ ARRAY_SIZE(serv_out16_arr)

 static const struct value_name_pair pr_in_arr[] = {
 	{0x0, "Persistent reserve in, read keys"},
 	{0x1, "Persistent reserve in, read reservation"},
 	{0x2, "Persistent reserve in, report capabilities"},
 	{0x3, "Persistent reserve in, read full status"},
 };
 #define PR_IN_SZ ARRAY_SIZE(pr_in_arr)

 static const struct value_name_pair pr_out_arr[] = {
 	{0x0, "Persistent reserve out, register"},
 	{0x1, "Persistent reserve out, reserve"},
 	{0x2, "Persistent reserve out, release"},
 	{0x3, "Persistent reserve out, clear"},
 	{0x4, "Persistent reserve out, preempt"},
 	{0x5, "Persistent reserve out, preempt and abort"},
 	{0x6, "Persistent reserve out, register and ignore existing key"},
 	{0x7, "Persistent reserve out, register and move"},
 };
 #define PR_OUT_SZ ARRAY_SIZE(pr_out_arr)

 /* SPC-4 rev 34 renamed the Extended Copy opcode to Third Party Copy Out.
    LID1 (List Identifier length: 1 byte) is the Extended Copy found in SPC-2
    and SPC-3 */
 static const struct value_name_pair tpc_out_arr[] = {
 	{0x0, "Extended copy(LID1)"},
 	{0x1, "Extended copy(LID4)"},
 	{0x10, "Populate token"},
 	{0x11, "Write using token"},
 	{0x1c, "Copy operation abort"},
 };
 #define TPC_OUT_SZ ARRAY_SIZE(tpc_out_arr)

 static const struct value_name_pair tpc_in_arr[] = {
 	{0x0, "Receive copy status(LID1)"},
 	{0x1, "Receive copy data(LID1)"},
 	{0x3, "Receive copy operating parameters"},
 	{0x4, "Receive copy failure details(LID1)"},
 	{0x5, "Receive copy status(LID4)"},
 	{0x6, "Receive copy data(LID4)"},
 	{0x7, "Receive ROD token information"},
 	{0x8, "Report all ROD tokens"},
 };
 #define TPC_IN_SZ ARRAY_SIZE(tpc_in_arr)


 static const struct value_name_pair variable_length_arr[] = {
 	{0x1, "Rebuild(32)"},
 	{0x2, "Regenerate(32)"},
 	{0x3, "Xdread(32)"},
 	{0x4, "Xdwrite(32)"},
 	{0x5, "Xdwrite extended(32)"},
 	{0x6, "Xpwrite(32)"},
 	{0x7, "Xdwriteread(32)"},
 	{0x8, "Xdwrite extended(64)"},
 	{0x9, "Read(32)"},
 	{0xa, "Verify(32)"},
 	{0xb, "Write(32)"},
 	{0xc, "Write an verify(32)"},
 	{0xd, "Write same(32)"},
 	{0x8801, "Format OSD"},
 	{0x8802, "Create (osd)"},
 	{0x8803, "List (osd)"},
 	{0x8805, "Read (osd)"},
 	{0x8806, "Write (osd)"},
 	{0x8807, "Append (osd)"},
 	{0x8808, "Flush (osd)"},
 	{0x880a, "Remove (osd)"},
 	{0x880b, "Create partition (osd)"},
 	{0x880c, "Remove partition (osd)"},
 	{0x880e, "Get attributes (osd)"},
 	{0x880f, "Set attributes (osd)"},
 	{0x8812, "Create and write (osd)"},
 	{0x8815, "Create collection (osd)"},
 	{0x8816, "Remove collection (osd)"},
 	{0x8817, "List collection (osd)"},
 	{0x8818, "Set key (osd)"},
 	{0x8819, "Set master key (osd)"},
 	{0x881a, "Flush collection (osd)"},
 	{0x881b, "Flush partition (osd)"},
 	{0x881c, "Flush OSD"},
 	{0x8f7e, "Perform SCSI command (osd)"},
 	{0x8f7f, "Perform task management function (osd)"},
 };
 #define VARIABLE_LENGTH_SZ ARRAY_SIZE(variable_length_arr)

 static struct sa_name_list sa_names_arr[] = {
 	{VARIABLE_LENGTH_CMD, variable_length_arr, VARIABLE_LENGTH_SZ},
 	{MAINTENANCE_IN, maint_in_arr, MAINT_IN_SZ},
 	{MAINTENANCE_OUT, maint_out_arr, MAINT_OUT_SZ},
 	{PERSISTENT_RESERVE_IN, pr_in_arr, PR_IN_SZ},
 	{PERSISTENT_RESERVE_OUT, pr_out_arr, PR_OUT_SZ},
 	{SERVICE_ACTION_IN_12, serv_in12_arr, SERV_IN12_SZ},
 	{SERVICE_ACTION_OUT_12, serv_out12_arr, SERV_OUT12_SZ},
 	{SERVICE_ACTION_BIDIRECTIONAL, serv_bidi_arr, SERV_BIDI_SZ},
 	{SERVICE_ACTION_IN_16, serv_in16_arr, SERV_IN16_SZ},
 	{SERVICE_ACTION_OUT_16, serv_out16_arr, SERV_OUT16_SZ},
 	{THIRD_PARTY_COPY_IN, tpc_in_arr, TPC_IN_SZ},
 	{THIRD_PARTY_COPY_OUT, tpc_out_arr, TPC_OUT_SZ},
 	{0, NULL, 0},
 };

 bool scsi_opcode_sa_name(int opcode, int service_action,
 			 const char **cdb_name, const char **sa_name)
 {
 	struct sa_name_list *sa_name_ptr;
 	const struct value_name_pair *arr = NULL;
 	int arr_sz, k;

 	*cdb_name = NULL;
 	if (opcode >= VENDOR_SPECIFIC_CDB)
 		return false;

 	if (opcode < ARRAY_SIZE(cdb_byte0_names))
 		*cdb_name = cdb_byte0_names[opcode];

 	for (sa_name_ptr = sa_names_arr; sa_name_ptr->arr; ++sa_name_ptr) {
 		if (sa_name_ptr->opcode == opcode) {
 			arr = sa_name_ptr->arr;
 			arr_sz = sa_name_ptr->arr_sz;
 			break;
 		}
 	}
 	if (!arr)
 		return false;

 	for (k = 0; k < arr_sz; ++k, ++arr) {
 		if (service_action == arr->value)
 			break;
 	}
 	if (k < arr_sz)
 		*sa_name = arr->name;

 	return true;
 }

 struct error_info {
 	unsigned short code12;	/* 0x0302 looks better than 0x03,0x02 */
 	unsigned short size;
 };

 /*
  * There are 700+ entries in this table. To save space, we don't store
  * (code, pointer) pairs, which would make sizeof(struct
  * error_info)==16 on 64 bits. Rather, the second element just stores
  * the size (including \0) of the corresponding string, and we use the
  * sum of these to get the appropriate offset into additional_text
  * defined below. This approach saves 12 bytes per entry.
  */
 static const struct error_info additional[] =
 {
 #define SENSE_CODE(c, s) {c, sizeof(s)},
 #include "sense_codes.h"
 #undef SENSE_CODE
 };

 static const char *additional_text =
 #define SENSE_CODE(c, s) s "\0"
 #include "sense_codes.h"
 #undef SENSE_CODE
 	;

 struct error_info2 {
 	unsigned char code1, code2_min, code2_max;
 	const char * str;
 	const char * fmt;
 };

 static const struct error_info2 additional2[] =
 {
 	{0x40, 0x00, 0x7f, "Ram failure", ""},
 	{0x40, 0x80, 0xff, "Diagnostic failure on component", ""},
 	{0x41, 0x00, 0xff, "Data path failure", ""},
 	{0x42, 0x00, 0xff, "Power-on or self-test failure", ""},
 	{0x4D, 0x00, 0xff, "Tagged overlapped commands", "task tag "},
 	{0x70, 0x00, 0xff, "Decompression exception", "short algorithm id of "},
 	{0, 0, 0, NULL, NULL}
 };

 /* description of the sense key values */
 static const char * const snstext[] = {
 	"No Sense",	    /* 0: There is no sense information */
 	"Recovered Error",  /* 1: The last command completed successfully
 				  but used error correction */
 	"Not Ready",	    /* 2: The addressed target is not ready */
 	"Medium Error",	    /* 3: Data error detected on the medium */
 	"Hardware Error",   /* 4: Controller or device failure */
 	"Illegal Request",  /* 5: Error in request */
 	"Unit Attention",   /* 6: Removable medium was changed, or
 				  the target has been reset, or ... */
 	"Data Protect",	    /* 7: Access to the data is blocked */
 	"Blank Check",	    /* 8: Reached unexpected written or unwritten
 				  region of the medium */
 	"Vendor Specific(9)",
 	"Copy Aborted",	    /* A: COPY or COMPARE was aborted */
 	"Aborted Command",  /* B: The target aborted the command */
 	"Equal",	    /* C: A SEARCH DATA command found data equal,
 				  reserved in SPC-4 rev 36 */
 	"Volume Overflow",  /* D: Medium full with still data to be written */
 	"Miscompare",	    /* E: Source data and data on the medium
 				  do not agree */
 	"Completed",	    /* F: command completed sense data reported,
 				  may occur for successful command */
 };

 /* Get sense key string or NULL if not available */
 const char *
 scsi_sense_key_string(unsigned char key) {
 	if (key <= 0xE)
 		return snstext[key];
 	return NULL;
 }
 EXPORT_SYMBOL(scsi_sense_key_string);

 /*
  * Get additional sense code string or NULL if not available.
  * This string may contain a "%x" and should be printed with ascq as arg.
  */
 const char *
 scsi_extd_sense_format(unsigned char asc, unsigned char ascq, const char **fmt)
 {
 	int i;
 	unsigned short code = ((asc << 8) | ascq);
 	unsigned offset = 0;

 	*fmt = NULL;
 	for (i = 0; i < ARRAY_SIZE(additional); i++) {
 		if (additional[i].code12 == code)
 			return additional_text + offset;
 		offset += additional[i].size;
 	}
 	for (i = 0; additional2[i].fmt; i++) {
 		if (additional2[i].code1 == asc &&
 		    ascq >= additional2[i].code2_min &&
 		    ascq <= additional2[i].code2_max) {
 			*fmt = additional2[i].fmt;
 			return additional2[i].str;
 		}
 	}
 	return NULL;
 }
 EXPORT_SYMBOL(scsi_extd_sense_format);

 static const char * const hostbyte_table[]={
 "DID_OK", "DID_NO_CONNECT", "DID_BUS_BUSY", "DID_TIME_OUT", "DID_BAD_TARGET",
 "DID_ABORT", "DID_PARITY", "DID_ERROR", "DID_RESET", "DID_BAD_INTR",
 "DID_PASSTHROUGH", "DID_SOFT_ERROR", "DID_IMM_RETRY", "DID_REQUEUE",
 "DID_TRANSPORT_DISRUPTED", "DID_TRANSPORT_FAILFAST", "DID_TARGET_FAILURE",
 "DID_NEXUS_FAILURE" };

 static const char * const driverbyte_table[]={
 "DRIVER_OK", "DRIVER_BUSY", "DRIVER_SOFT",  "DRIVER_MEDIA", "DRIVER_ERROR",
 "DRIVER_INVALID", "DRIVER_TIMEOUT", "DRIVER_HARD", "DRIVER_SENSE"};

 const char *scsi_hostbyte_string(int result)
 {
 	const char *hb_string = NULL;
 	int hb = host_byte(result);

 	if (hb < ARRAY_SIZE(hostbyte_table))
 		hb_string = hostbyte_table[hb];
 	return hb_string;
 }
 EXPORT_SYMBOL(scsi_hostbyte_string);

 const char *scsi_driverbyte_string(int result)
 {
 	const char *db_string = NULL;
 	int db = driver_byte(result);

 	if (db < ARRAY_SIZE(driverbyte_table))
 		db_string = driverbyte_table[db];
 	return db_string;
 }
 EXPORT_SYMBOL(scsi_driverbyte_string);

 #define scsi_mlreturn_name(result)	{ result, #result }
 static const struct value_name_pair scsi_mlreturn_arr[] = {
 	scsi_mlreturn_name(NEEDS_RETRY),
 	scsi_mlreturn_name(SUCCESS),
 	scsi_mlreturn_name(FAILED),
 	scsi_mlreturn_name(QUEUED),
 	scsi_mlreturn_name(SOFT_ERROR),
 	scsi_mlreturn_name(ADD_TO_MLQUEUE),
 	scsi_mlreturn_name(TIMEOUT_ERROR),
 	scsi_mlreturn_name(SCSI_RETURN_NOT_HANDLED),
 	scsi_mlreturn_name(FAST_IO_FAIL)
 };

 const char *scsi_mlreturn_string(int result)
 {
 	const struct value_name_pair *arr = scsi_mlreturn_arr;
 	int k;

 	for (k = 0; k < ARRAY_SIZE(scsi_mlreturn_arr); ++k, ++arr) {
 		if (result == arr->value)
 			return arr->name;
 	}
 	return NULL;
 }
 EXPORT_SYMBOL(scsi_mlreturn_string);
	/*
	* ASCII values for a number of symbolic constants, printing functions,
	* etc.
	* Additions for SCSI 2 and Linux 2.2.x by D. Gilbert (990422)
	* Additions for SCSI 3+ (SPC-3 T10/1416-D Rev 07 3 May 2002)
	* by D. Gilbert and aeb (20020609)
	* Updated to SPC-4 T10/1713-D Rev 36g, D. Gilbert 20130701
	*/

	#include <linux/blkdev.h>
	#include <linux/module.h>
	#include <linux/kernel.h>

	#include <scsi/scsi.h>
	#include <scsi/scsi_cmnd.h>
	#include <scsi/scsi_device.h>
	#include <scsi/scsi_host.h>
	#include <scsi/scsi_eh.h>
	#include <scsi/scsi_dbg.h>

	/* Commands with service actions that change the command name */
	#define THIRD_PARTY_COPY_OUT 0x83
	#define THIRD_PARTY_COPY_IN 0x84

	struct sa_name_list {
	int opcode;
	const struct value_name_pair *arr;
	int arr_sz;
	};

	struct value_name_pair {
	int value;
	const char * name;
	};

	static const char * cdb_byte0_names[] = {
	/* 00-03 */ "Test Unit Ready", "Rezero Unit/Rewind", NULL, "Request Sense",
	/* 04-07 */ "Format Unit/Medium", "Read Block Limits", NULL,
	"Reassign Blocks",
	/* 08-0d */ "Read(6)", NULL, "Write(6)", "Seek(6)", NULL, NULL,
	/* 0e-12 */ NULL, "Read Reverse", "Write Filemarks", "Space", "Inquiry",
	/* 13-16 */ "Verify(6)", "Recover Buffered Data", "Mode Select(6)",
	"Reserve(6)",
	/* 17-1a */ "Release(6)", "Copy", "Erase", "Mode Sense(6)",
	/* 1b-1d */ "Start/Stop Unit", "Receive Diagnostic", "Send Diagnostic",
	/* 1e-1f */ "Prevent/Allow Medium Removal", NULL,
	/* 20-22 */ NULL, NULL, NULL,
	/* 23-28 */ "Read Format Capacities", "Set Window",
	"Read Capacity(10)", NULL, NULL, "Read(10)",
	/* 29-2d */ "Read Generation", "Write(10)", "Seek(10)", "Erase(10)",
	"Read updated block",
	/* 2e-31 */ "Write Verify(10)", "Verify(10)", "Search High", "Search Equal",
	/* 32-34 */ "Search Low", "Set Limits", "Prefetch/Read Position",
	/* 35-37 */ "Synchronize Cache(10)", "Lock/Unlock Cache(10)",
	"Read Defect Data(10)",
	/* 38-3c */ "Medium Scan", "Compare", "Copy Verify", "Write Buffer",
	"Read Buffer",
	/* 3d-3f */ "Update Block", "Read Long(10)", "Write Long(10)",
	/* 40-41 */ "Change Definition", "Write Same(10)",
	/* 42-48 */ "Unmap/Read sub-channel", "Read TOC/PMA/ATIP",
	"Read density support", "Play audio(10)", "Get configuration",
	"Play audio msf", "Sanitize/Play audio track/index",
	/* 49-4f */ "Play track relative(10)", "Get event status notification",
	"Pause/resume", "Log Select", "Log Sense", "Stop play/scan",
	NULL,
	/* 50-55 */ "Xdwrite", "Xpwrite, Read disk info", "Xdread, Read track info",
	"Reserve track", "Send OPC info", "Mode Select(10)",
	/* 56-5b */ "Reserve(10)", "Release(10)", "Repair track", "Read master cue",
	"Mode Sense(10)", "Close track/session",
	/* 5c-5f */ "Read buffer capacity", "Send cue sheet", "Persistent reserve in",
	"Persistent reserve out",
	/* 60-67 */ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
	/* 68-6f */ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
	/* 70-77 */ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
	/* 78-7f */ NULL, NULL, NULL, NULL, NULL, NULL, "Extended CDB",
	"Variable length",
	/* 80-84 */ "Xdwrite(16)", "Rebuild(16)", "Regenerate(16)",
	"Third party copy out", "Third party copy in",
	/* 85-89 */ "ATA command pass through(16)", "Access control in",
	"Access control out", "Read(16)", "Compare and Write",
	/* 8a-8f */ "Write(16)", "ORWrite", "Read attributes", "Write attributes",
	"Write and verify(16)", "Verify(16)",
	/* 90-94 */ "Pre-fetch(16)", "Synchronize cache(16)",
	"Lock/unlock cache(16)", "Write same(16)", NULL,
	/* 95-99 */ NULL, NULL, NULL, NULL, NULL,
	/* 9a-9f */ NULL, NULL, NULL, "Service action bidirectional",
	"Service action in(16)", "Service action out(16)",
	/* a0-a5 */ "Report luns", "ATA command pass through(12)/Blank",
	"Security protocol in", "Maintenance in", "Maintenance out",
	"Move medium/play audio(12)",
	/* a6-a9 */ "Exchange medium", "Move medium attached", "Read(12)",
	"Play track relative(12)",
	/* aa-ae */ "Write(12)", NULL, "Erase(12), Get Performance",
	"Read DVD structure", "Write and verify(12)",
	/* af-b1 */ "Verify(12)", "Search data high(12)", "Search data equal(12)",
	/* b2-b4 */ "Search data low(12)", "Set limits(12)",
	"Read element status attached",
	/* b5-b6 */ "Security protocol out", "Send volume tag, set streaming",
	/* b7-b9 */ "Read defect data(12)", "Read element status", "Read CD msf",
	/* ba-bc */ "Redundancy group (in), Scan",
	"Redundancy group (out), Set cd-rom speed", "Spare (in), Play cd",
	/* bd-bf */ "Spare (out), Mechanism status", "Volume set (in), Read cd",
	"Volume set (out), Send DVD structure",
	};

	static const struct value_name_pair maint_in_arr[] = {
	{0x5, "Report identifying information"},
	{0xa, "Report target port groups"},
	{0xb, "Report aliases"},
	{0xc, "Report supported operation codes"},
	{0xd, "Report supported task management functions"},
	{0xe, "Report priority"},
	{0xf, "Report timestamp"},
	{0x10, "Management protocol in"},
	};
	#define MAINT_IN_SZ ARRAY_SIZE(maint_in_arr)

	static const struct value_name_pair maint_out_arr[] = {
	{0x6, "Set identifying information"},
	{0xa, "Set target port groups"},
	{0xb, "Change aliases"},
	{0xc, "Remove I_T nexus"},
	{0xe, "Set priority"},
	{0xf, "Set timestamp"},
	{0x10, "Management protocol out"},
	};
	#define MAINT_OUT_SZ ARRAY_SIZE(maint_out_arr)

	static const struct value_name_pair serv_in12_arr[] = {
	{0x1, "Read media serial number"},
	};
	#define SERV_IN12_SZ ARRAY_SIZE(serv_in12_arr)

	static const struct value_name_pair serv_out12_arr[] = {
	{-1, "dummy entry"},
	};
	#define SERV_OUT12_SZ ARRAY_SIZE(serv_out12_arr)

	static const struct value_name_pair serv_bidi_arr[] = {
	{-1, "dummy entry"},
	};
	#define SERV_BIDI_SZ ARRAY_SIZE(serv_bidi_arr)

	static const struct value_name_pair serv_in16_arr[] = {
	{0x10, "Read capacity(16)"},
	{0x11, "Read long(16)"},
	{0x12, "Get LBA status"},
	{0x13, "Report referrals"},
	};
	#define SERV_IN16_SZ ARRAY_SIZE(serv_in16_arr)

	static const struct value_name_pair serv_out16_arr[] = {
	{0x11, "Write long(16)"},
	{0x1f, "Notify data transfer device(16)"},
	};
	#define SERV_OUT16_SZ ARRAY_SIZE(serv_out16_arr)

	static const struct value_name_pair pr_in_arr[] = {
	{0x0, "Persistent reserve in, read keys"},
	{0x1, "Persistent reserve in, read reservation"},
	{0x2, "Persistent reserve in, report capabilities"},
	{0x3, "Persistent reserve in, read full status"},
	};
	#define PR_IN_SZ ARRAY_SIZE(pr_in_arr)

	static const struct value_name_pair pr_out_arr[] = {
	{0x0, "Persistent reserve out, register"},
	{0x1, "Persistent reserve out, reserve"},
	{0x2, "Persistent reserve out, release"},
	{0x3, "Persistent reserve out, clear"},
	{0x4, "Persistent reserve out, preempt"},
	{0x5, "Persistent reserve out, preempt and abort"},
	{0x6, "Persistent reserve out, register and ignore existing key"},
	{0x7, "Persistent reserve out, register and move"},
	};
	#define PR_OUT_SZ ARRAY_SIZE(pr_out_arr)

	/* SPC-4 rev 34 renamed the Extended Copy opcode to Third Party Copy Out.
	LID1 (List Identifier length: 1 byte) is the Extended Copy found in SPC-2
	and SPC-3 */
	static const struct value_name_pair tpc_out_arr[] = {
	{0x0, "Extended copy(LID1)"},
	{0x1, "Extended copy(LID4)"},
	{0x10, "Populate token"},
	{0x11, "Write using token"},
	{0x1c, "Copy operation abort"},
	};
	#define TPC_OUT_SZ ARRAY_SIZE(tpc_out_arr)

	static const struct value_name_pair tpc_in_arr[] = {
	{0x0, "Receive copy status(LID1)"},
	{0x1, "Receive copy data(LID1)"},
	{0x3, "Receive copy operating parameters"},
	{0x4, "Receive copy failure details(LID1)"},
	{0x5, "Receive copy status(LID4)"},
	{0x6, "Receive copy data(LID4)"},
	{0x7, "Receive ROD token information"},
	{0x8, "Report all ROD tokens"},
	};
	#define TPC_IN_SZ ARRAY_SIZE(tpc_in_arr)


	static const struct value_name_pair variable_length_arr[] = {
	{0x1, "Rebuild(32)"},
	{0x2, "Regenerate(32)"},
	{0x3, "Xdread(32)"},
	{0x4, "Xdwrite(32)"},
	{0x5, "Xdwrite extended(32)"},
	{0x6, "Xpwrite(32)"},
	{0x7, "Xdwriteread(32)"},
	{0x8, "Xdwrite extended(64)"},
	{0x9, "Read(32)"},
	{0xa, "Verify(32)"},
	{0xb, "Write(32)"},
	{0xc, "Write an verify(32)"},
	{0xd, "Write same(32)"},
	{0x8801, "Format OSD"},
	{0x8802, "Create (osd)"},
	{0x8803, "List (osd)"},
	{0x8805, "Read (osd)"},
	{0x8806, "Write (osd)"},
	{0x8807, "Append (osd)"},
	{0x8808, "Flush (osd)"},
	{0x880a, "Remove (osd)"},
	{0x880b, "Create partition (osd)"},
	{0x880c, "Remove partition (osd)"},
	{0x880e, "Get attributes (osd)"},
	{0x880f, "Set attributes (osd)"},
	{0x8812, "Create and write (osd)"},
	{0x8815, "Create collection (osd)"},
	{0x8816, "Remove collection (osd)"},
	{0x8817, "List collection (osd)"},
	{0x8818, "Set key (osd)"},
	{0x8819, "Set master key (osd)"},
	{0x881a, "Flush collection (osd)"},
	{0x881b, "Flush partition (osd)"},
	{0x881c, "Flush OSD"},
	{0x8f7e, "Perform SCSI command (osd)"},
	{0x8f7f, "Perform task management function (osd)"},
	};
	#define VARIABLE_LENGTH_SZ ARRAY_SIZE(variable_length_arr)

	static struct sa_name_list sa_names_arr[] = {
	{VARIABLE_LENGTH_CMD, variable_length_arr, VARIABLE_LENGTH_SZ},
	{MAINTENANCE_IN, maint_in_arr, MAINT_IN_SZ},
	{MAINTENANCE_OUT, maint_out_arr, MAINT_OUT_SZ},
	{PERSISTENT_RESERVE_IN, pr_in_arr, PR_IN_SZ},
	{PERSISTENT_RESERVE_OUT, pr_out_arr, PR_OUT_SZ},
	{SERVICE_ACTION_IN_12, serv_in12_arr, SERV_IN12_SZ},
	{SERVICE_ACTION_OUT_12, serv_out12_arr, SERV_OUT12_SZ},
	{SERVICE_ACTION_BIDIRECTIONAL, serv_bidi_arr, SERV_BIDI_SZ},
	{SERVICE_ACTION_IN_16, serv_in16_arr, SERV_IN16_SZ},
	{SERVICE_ACTION_OUT_16, serv_out16_arr, SERV_OUT16_SZ},
	{THIRD_PARTY_COPY_IN, tpc_in_arr, TPC_IN_SZ},
	{THIRD_PARTY_COPY_OUT, tpc_out_arr, TPC_OUT_SZ},
	{0, NULL, 0},
	};

	bool scsi_opcode_sa_name(int opcode, int service_action,
	const char cdb_name, const char sa_name)
	{
	struct sa_name_list *sa_name_ptr;
	const struct value_name_pair *arr = NULL;
	int arr_sz, k;

	*cdb_name = NULL;
	if (opcode >= VENDOR_SPECIFIC_CDB)
	return false;

	if (opcode < ARRAY_SIZE(cdb_byte0_names))
	*cdb_name = cdb_byte0_names[opcode];

	for (sa_name_ptr = sa_names_arr; sa_name_ptr->arr; ++sa_name_ptr) {
	if (sa_name_ptr->opcode == opcode) {
	arr = sa_name_ptr->arr;
	arr_sz = sa_name_ptr->arr_sz;
	break;
	}
	}
	if (!arr)
	return false;

	for (k = 0; k < arr_sz; ++k, ++arr) {
	if (service_action == arr->value)
	break;
	}
	if (k < arr_sz)
	*sa_name = arr->name;

	return true;
	}

	struct error_info {
	unsigned short code12; /* 0x0302 looks better than 0x03,0x02 */
	unsigned short size;
	};

	/*
	* There are 700+ entries in this table. To save space, we don't store
	* (code, pointer) pairs, which would make sizeof(struct
	* error_info)==16 on 64 bits. Rather, the second element just stores
	* the size (including \0) of the corresponding string, and we use the
	* sum of these to get the appropriate offset into additional_text
	* defined below. This approach saves 12 bytes per entry.
	*/
	static const struct error_info additional[] =
	{
	#define SENSE_CODE(c, s) {c, sizeof(s)},
	#include "sense_codes.h"
	#undef SENSE_CODE
	};

	static const char *additional_text =
	#define SENSE_CODE(c, s) s "\0"
	#include "sense_codes.h"
	#undef SENSE_CODE
	;

	struct error_info2 {
	unsigned char code1, code2_min, code2_max;
	const char * str;
	const char * fmt;
	};

	static const struct error_info2 additional2[] =
	{
	{0x40, 0x00, 0x7f, "Ram failure", ""},
	{0x40, 0x80, 0xff, "Diagnostic failure on component", ""},
	{0x41, 0x00, 0xff, "Data path failure", ""},
	{0x42, 0x00, 0xff, "Power-on or self-test failure", ""},
	{0x4D, 0x00, 0xff, "Tagged overlapped commands", "task tag "},
	{0x70, 0x00, 0xff, "Decompression exception", "short algorithm id of "},
	{0, 0, 0, NULL, NULL}
	};

	/* description of the sense key values */
	static const char * const snstext[] = {
	"No Sense", /* 0: There is no sense information */
	"Recovered Error", /* 1: The last command completed successfully
	but used error correction */
	"Not Ready", /* 2: The addressed target is not ready */
	"Medium Error", /* 3: Data error detected on the medium */
	"Hardware Error", /* 4: Controller or device failure */
	"Illegal Request", /* 5: Error in request */
	"Unit Attention", /* 6: Removable medium was changed, or
	the target has been reset, or ... */
	"Data Protect", /* 7: Access to the data is blocked */
	"Blank Check", /* 8: Reached unexpected written or unwritten
	region of the medium */
	"Vendor Specific(9)",
	"Copy Aborted", /* A: COPY or COMPARE was aborted */
	"Aborted Command", /* B: The target aborted the command */
	"Equal", /* C: A SEARCH DATA command found data equal,
	reserved in SPC-4 rev 36 */
	"Volume Overflow", /* D: Medium full with still data to be written */
	"Miscompare", /* E: Source data and data on the medium
	do not agree */
	"Completed", /* F: command completed sense data reported,
	may occur for successful command */
	};

	/* Get sense key string or NULL if not available */
	const char *
	scsi_sense_key_string(unsigned char key) {
	if (key <= 0xE)
	return snstext[key];
	return NULL;
	}
	EXPORT_SYMBOL(scsi_sense_key_string);

	/*
	* Get additional sense code string or NULL if not available.
	* This string may contain a "%x" and should be printed with ascq as arg.
	*/
	const char *
	scsi_extd_sense_format(unsigned char asc, unsigned char ascq, const char **fmt)
	{
	int i;
	unsigned short code = ((asc << 8) \| ascq);
	unsigned offset = 0;

	*fmt = NULL;
	for (i = 0; i < ARRAY_SIZE(additional); i++) {
	if (additional[i].code12 == code)
	return additional_text + offset;
	offset += additional[i].size;
	}
	for (i = 0; additional2[i].fmt; i++) {
	if (additional2[i].code1 == asc &&
	ascq >= additional2[i].code2_min &&
	ascq <= additional2[i].code2_max) {
	*fmt = additional2[i].fmt;
	return additional2[i].str;
	}
	}
	return NULL;
	}
	EXPORT_SYMBOL(scsi_extd_sense_format);

	static const char * const hostbyte_table[]={
	"DID_OK", "DID_NO_CONNECT", "DID_BUS_BUSY", "DID_TIME_OUT", "DID_BAD_TARGET",
	"DID_ABORT", "DID_PARITY", "DID_ERROR", "DID_RESET", "DID_BAD_INTR",
	"DID_PASSTHROUGH", "DID_SOFT_ERROR", "DID_IMM_RETRY", "DID_REQUEUE",
	"DID_TRANSPORT_DISRUPTED", "DID_TRANSPORT_FAILFAST", "DID_TARGET_FAILURE",
	"DID_NEXUS_FAILURE" };

	static const char * const driverbyte_table[]={
	"DRIVER_OK", "DRIVER_BUSY", "DRIVER_SOFT", "DRIVER_MEDIA", "DRIVER_ERROR",
	"DRIVER_INVALID", "DRIVER_TIMEOUT", "DRIVER_HARD", "DRIVER_SENSE"};

	const char *scsi_hostbyte_string(int result)
	{
	const char *hb_string = NULL;
	int hb = host_byte(result);

	if (hb < ARRAY_SIZE(hostbyte_table))
	hb_string = hostbyte_table[hb];
	return hb_string;
	}
	EXPORT_SYMBOL(scsi_hostbyte_string);

	const char *scsi_driverbyte_string(int result)
	{
	const char *db_string = NULL;
	int db = driver_byte(result);

	if (db < ARRAY_SIZE(driverbyte_table))
	db_string = driverbyte_table[db];
	return db_string;
	}
	EXPORT_SYMBOL(scsi_driverbyte_string);

	#define scsi_mlreturn_name(result) { result, #result }
	static const struct value_name_pair scsi_mlreturn_arr[] = {
	scsi_mlreturn_name(NEEDS_RETRY),
	scsi_mlreturn_name(SUCCESS),
	scsi_mlreturn_name(FAILED),
	scsi_mlreturn_name(QUEUED),
	scsi_mlreturn_name(SOFT_ERROR),
	scsi_mlreturn_name(ADD_TO_MLQUEUE),
	scsi_mlreturn_name(TIMEOUT_ERROR),
	scsi_mlreturn_name(SCSI_RETURN_NOT_HANDLED),
	scsi_mlreturn_name(FAST_IO_FAIL)
	};

	const char *scsi_mlreturn_string(int result)
	{
	const struct value_name_pair *arr = scsi_mlreturn_arr;
	int k;

	for (k = 0; k < ARRAY_SIZE(scsi_mlreturn_arr); ++k, ++arr) {
	if (result == arr->value)
	return arr->name;
	}
	return NULL;
	}
	EXPORT_SYMBOL(scsi_mlreturn_string);