| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * This header file contains public constants and structures used by |
| * the SCSI initiator code. |
| */ |
| #ifndef _SCSI_SCSI_H |
| #define _SCSI_SCSI_H |
| |
| #include <linux/types.h> |
| #include <linux/scatterlist.h> |
| #include <linux/kernel.h> |
| #include <scsi/scsi_common.h> |
| #include <scsi/scsi_proto.h> |
| |
| struct scsi_cmnd; |
| |
| enum scsi_timeouts { |
| SCSI_DEFAULT_EH_TIMEOUT = 10 * HZ, |
| }; |
| |
| /* |
| * DIX-capable adapters effectively support infinite chaining for the |
| * protection information scatterlist |
| */ |
| #define SCSI_MAX_PROT_SG_SEGMENTS 0xFFFF |
| |
| /* |
| * Special value for scanning to specify scanning or rescanning of all |
| * possible channels, (target) ids, or luns on a given shost. |
| */ |
| #define SCAN_WILD_CARD ~0 |
| |
| /** scsi_status_is_good - check the status return. |
| * |
| * @status: the status passed up from the driver (including host and |
| * driver components) |
| * |
| * This returns true for known good conditions that may be treated as |
| * command completed normally |
| */ |
| static inline int scsi_status_is_good(int status) |
| { |
| /* |
| * FIXME: bit0 is listed as reserved in SCSI-2, but is |
| * significant in SCSI-3. For now, we follow the SCSI-2 |
| * behaviour and ignore reserved bits. |
| */ |
| status &= 0xfe; |
| return ((status == SAM_STAT_GOOD) || |
| (status == SAM_STAT_CONDITION_MET) || |
| /* Next two "intermediate" statuses are obsolete in SAM-4 */ |
| (status == SAM_STAT_INTERMEDIATE) || |
| (status == SAM_STAT_INTERMEDIATE_CONDITION_MET) || |
| /* FIXME: this is obsolete in SAM-3 */ |
| (status == SAM_STAT_COMMAND_TERMINATED)); |
| } |
| |
| |
| /* |
| * standard mode-select header prepended to all mode-select commands |
| */ |
| |
| struct ccs_modesel_head { |
| __u8 _r1; /* reserved */ |
| __u8 medium; /* device-specific medium type */ |
| __u8 _r2; /* reserved */ |
| __u8 block_desc_length; /* block descriptor length */ |
| __u8 density; /* device-specific density code */ |
| __u8 number_blocks_hi; /* number of blocks in this block desc */ |
| __u8 number_blocks_med; |
| __u8 number_blocks_lo; |
| __u8 _r3; |
| __u8 block_length_hi; /* block length for blocks in this desc */ |
| __u8 block_length_med; |
| __u8 block_length_lo; |
| }; |
| |
| /* |
| * The Well Known LUNS (SAM-3) in our int representation of a LUN |
| */ |
| #define SCSI_W_LUN_BASE 0xc100 |
| #define SCSI_W_LUN_REPORT_LUNS (SCSI_W_LUN_BASE + 1) |
| #define SCSI_W_LUN_ACCESS_CONTROL (SCSI_W_LUN_BASE + 2) |
| #define SCSI_W_LUN_TARGET_LOG_PAGE (SCSI_W_LUN_BASE + 3) |
| |
| static inline int scsi_is_wlun(u64 lun) |
| { |
| return (lun & 0xff00) == SCSI_W_LUN_BASE; |
| } |
| |
| |
| /* |
| * MESSAGE CODES |
| */ |
| |
| #define COMMAND_COMPLETE 0x00 |
| #define EXTENDED_MESSAGE 0x01 |
| #define EXTENDED_MODIFY_DATA_POINTER 0x00 |
| #define EXTENDED_SDTR 0x01 |
| #define EXTENDED_EXTENDED_IDENTIFY 0x02 /* SCSI-I only */ |
| #define EXTENDED_WDTR 0x03 |
| #define EXTENDED_PPR 0x04 |
| #define EXTENDED_MODIFY_BIDI_DATA_PTR 0x05 |
| #define SAVE_POINTERS 0x02 |
| #define RESTORE_POINTERS 0x03 |
| #define DISCONNECT 0x04 |
| #define INITIATOR_ERROR 0x05 |
| #define ABORT_TASK_SET 0x06 |
| #define MESSAGE_REJECT 0x07 |
| #define NOP 0x08 |
| #define MSG_PARITY_ERROR 0x09 |
| #define LINKED_CMD_COMPLETE 0x0a |
| #define LINKED_FLG_CMD_COMPLETE 0x0b |
| #define TARGET_RESET 0x0c |
| #define ABORT_TASK 0x0d |
| #define CLEAR_TASK_SET 0x0e |
| #define INITIATE_RECOVERY 0x0f /* SCSI-II only */ |
| #define RELEASE_RECOVERY 0x10 /* SCSI-II only */ |
| #define CLEAR_ACA 0x16 |
| #define LOGICAL_UNIT_RESET 0x17 |
| #define SIMPLE_QUEUE_TAG 0x20 |
| #define HEAD_OF_QUEUE_TAG 0x21 |
| #define ORDERED_QUEUE_TAG 0x22 |
| #define IGNORE_WIDE_RESIDUE 0x23 |
| #define ACA 0x24 |
| #define QAS_REQUEST 0x55 |
| |
| /* Old SCSI2 names, don't use in new code */ |
| #define BUS_DEVICE_RESET TARGET_RESET |
| #define ABORT ABORT_TASK_SET |
| |
| /* |
| * Host byte codes |
| */ |
| |
| #define DID_OK 0x00 /* NO error */ |
| #define DID_NO_CONNECT 0x01 /* Couldn't connect before timeout period */ |
| #define DID_BUS_BUSY 0x02 /* BUS stayed busy through time out period */ |
| #define DID_TIME_OUT 0x03 /* TIMED OUT for other reason */ |
| #define DID_BAD_TARGET 0x04 /* BAD target. */ |
| #define DID_ABORT 0x05 /* Told to abort for some other reason */ |
| #define DID_PARITY 0x06 /* Parity error */ |
| #define DID_ERROR 0x07 /* Internal error */ |
| #define DID_RESET 0x08 /* Reset by somebody. */ |
| #define DID_BAD_INTR 0x09 /* Got an interrupt we weren't expecting. */ |
| #define DID_PASSTHROUGH 0x0a /* Force command past mid-layer */ |
| #define DID_SOFT_ERROR 0x0b /* The low level driver just wish a retry */ |
| #define DID_IMM_RETRY 0x0c /* Retry without decrementing retry count */ |
| #define DID_REQUEUE 0x0d /* Requeue command (no immediate retry) also |
| * without decrementing the retry count */ |
| #define DID_TRANSPORT_DISRUPTED 0x0e /* Transport error disrupted execution |
| * and the driver blocked the port to |
| * recover the link. Transport class will |
| * retry or fail IO */ |
| #define DID_TRANSPORT_FAILFAST 0x0f /* Transport class fastfailed the io */ |
| #define DID_TARGET_FAILURE 0x10 /* Permanent target failure, do not retry on |
| * other paths */ |
| #define DID_NEXUS_FAILURE 0x11 /* Permanent nexus failure, retry on other |
| * paths might yield different results */ |
| #define DID_ALLOC_FAILURE 0x12 /* Space allocation on the device failed */ |
| #define DID_MEDIUM_ERROR 0x13 /* Medium error */ |
| #define DRIVER_OK 0x00 /* Driver status */ |
| |
| /* |
| * These indicate the error that occurred, and what is available. |
| */ |
| |
| #define DRIVER_BUSY 0x01 |
| #define DRIVER_SOFT 0x02 |
| #define DRIVER_MEDIA 0x03 |
| #define DRIVER_ERROR 0x04 |
| |
| #define DRIVER_INVALID 0x05 |
| #define DRIVER_TIMEOUT 0x06 |
| #define DRIVER_HARD 0x07 |
| #define DRIVER_SENSE 0x08 |
| |
| /* |
| * Internal return values. |
| */ |
| |
| #define NEEDS_RETRY 0x2001 |
| #define SUCCESS 0x2002 |
| #define FAILED 0x2003 |
| #define QUEUED 0x2004 |
| #define SOFT_ERROR 0x2005 |
| #define ADD_TO_MLQUEUE 0x2006 |
| #define TIMEOUT_ERROR 0x2007 |
| #define SCSI_RETURN_NOT_HANDLED 0x2008 |
| #define FAST_IO_FAIL 0x2009 |
| |
| /* |
| * Midlevel queue return values. |
| */ |
| #define SCSI_MLQUEUE_HOST_BUSY 0x1055 |
| #define SCSI_MLQUEUE_DEVICE_BUSY 0x1056 |
| #define SCSI_MLQUEUE_EH_RETRY 0x1057 |
| #define SCSI_MLQUEUE_TARGET_BUSY 0x1058 |
| |
| /* |
| * Use these to separate status msg and our bytes |
| * |
| * These are set by: |
| * |
| * status byte = set from target device |
| * msg_byte = return status from host adapter itself. |
| * host_byte = set by low-level driver to indicate status. |
| * driver_byte = set by mid-level. |
| */ |
| #define status_byte(result) (((result) >> 1) & 0x7f) |
| #define msg_byte(result) (((result) >> 8) & 0xff) |
| #define host_byte(result) (((result) >> 16) & 0xff) |
| #define driver_byte(result) (((result) >> 24) & 0xff) |
| |
| #define sense_class(sense) (((sense) >> 4) & 0x7) |
| #define sense_error(sense) ((sense) & 0xf) |
| #define sense_valid(sense) ((sense) & 0x80) |
| |
| /* |
| * default timeouts |
| */ |
| #define FORMAT_UNIT_TIMEOUT (2 * 60 * 60 * HZ) |
| #define START_STOP_TIMEOUT (60 * HZ) |
| #define MOVE_MEDIUM_TIMEOUT (5 * 60 * HZ) |
| #define READ_ELEMENT_STATUS_TIMEOUT (5 * 60 * HZ) |
| #define READ_DEFECT_DATA_TIMEOUT (60 * HZ ) |
| |
| |
| #define IDENTIFY_BASE 0x80 |
| #define IDENTIFY(can_disconnect, lun) (IDENTIFY_BASE |\ |
| ((can_disconnect) ? 0x40 : 0) |\ |
| ((lun) & 0x07)) |
| |
| /* |
| * struct scsi_device::scsi_level values. For SCSI devices other than those |
| * prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1) |
| * where "resp" is a byte array of the response to an INQUIRY. The scsi_level |
| * variable is visible to the user via sysfs. |
| */ |
| |
| #define SCSI_UNKNOWN 0 |
| #define SCSI_1 1 |
| #define SCSI_1_CCS 2 |
| #define SCSI_2 3 |
| #define SCSI_3 4 /* SPC */ |
| #define SCSI_SPC_2 5 |
| #define SCSI_SPC_3 6 |
| |
| /* |
| * INQ PERIPHERAL QUALIFIERS |
| */ |
| #define SCSI_INQ_PQ_CON 0x00 |
| #define SCSI_INQ_PQ_NOT_CON 0x01 |
| #define SCSI_INQ_PQ_NOT_CAP 0x03 |
| |
| |
| /* |
| * Here are some scsi specific ioctl commands which are sometimes useful. |
| * |
| * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395 |
| */ |
| |
| /* Used to obtain PUN and LUN info. Conflicts with CDROMAUDIOBUFSIZ */ |
| #define SCSI_IOCTL_GET_IDLUN 0x5382 |
| |
| /* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */ |
| |
| /* Used to obtain the host number of a device. */ |
| #define SCSI_IOCTL_PROBE_HOST 0x5385 |
| |
| /* Used to obtain the bus number for a device */ |
| #define SCSI_IOCTL_GET_BUS_NUMBER 0x5386 |
| |
| /* Used to obtain the PCI location of a device */ |
| #define SCSI_IOCTL_GET_PCI 0x5387 |
| |
| /* Pull a u32 out of a SCSI message (using BE SCSI conventions) */ |
| static inline __u32 scsi_to_u32(__u8 *ptr) |
| { |
| return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3]; |
| } |
| |
| #endif /* _SCSI_SCSI_H */ |