v4.19.13 snapshot.
diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h
new file mode 100644
index 0000000..eb7853c
--- /dev/null
+++ b/include/scsi/scsi.h
@@ -0,0 +1,283 @@
+/* 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+ /* FIXME: this is obsolete in SAM-3 */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 */