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authorBart Van Assche <bvanassche@acm.org>2021-05-23 19:54:56 -0700
committerMartin K. Petersen <martin.petersen@oracle.com>2021-06-02 23:09:39 -0400
commit149d0e489e807f1e6dc265f975a793cea11ecbea (patch)
treea0e16e90e239694ff6a13f0551dd55a07be67985 /include/scsi
parentd377f415dddc18b33c88dcd41cfe4fe6d9db82fb (diff)
scsi: core: Introduce enums for the SAM and host status codes
Make it possible for the compiler to verify whether SAM and host status codes are used correctly. [mkp: resolve conflicts with Hannes' SCSI result series] Link: https://lore.kernel.org/r/20210524025457.11299-3-bvanassche@acm.org Cc: Hannes Reinecke <hare@suse.com> Reviewed-by: John Garry <john.garry@huawei.com> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include/scsi')
-rw-r--r--include/scsi/scsi.h67
-rw-r--r--include/scsi/scsi_proto.h24
-rw-r--r--include/scsi/scsi_status.h74
3 files changed, 89 insertions, 76 deletions
diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h
index 358f969f368f..3e46859774c8 100644
--- a/include/scsi/scsi.h
+++ b/include/scsi/scsi.h
@@ -11,6 +11,7 @@
#include <linux/kernel.h>
#include <scsi/scsi_common.h>
#include <scsi/scsi_proto.h>
+#include <scsi/scsi_status.h>
struct scsi_cmnd;
@@ -79,78 +80,14 @@ static inline int scsi_status_is_check_condition(int status)
}
/*
- * MESSAGE CODES
+ * Extended 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 TERMINATE_IO_PROC 0x11 /* 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 DID_TRANSPORT_MARGINAL 0x14 /* Transport marginal errors */
-#define DRIVER_OK 0x00 /* Driver status */
/*
* Internal return values.
diff --git a/include/scsi/scsi_proto.h b/include/scsi/scsi_proto.h
index cb218a576bcf..f017843a8124 100644
--- a/include/scsi/scsi_proto.h
+++ b/include/scsi/scsi_proto.h
@@ -190,17 +190,19 @@ struct scsi_varlen_cdb_hdr {
* SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
* T10/1561-D Revision 4 Draft dated 7th November 2002.
*/
-#define SAM_STAT_GOOD 0x00
-#define SAM_STAT_CHECK_CONDITION 0x02
-#define SAM_STAT_CONDITION_MET 0x04
-#define SAM_STAT_BUSY 0x08
-#define SAM_STAT_INTERMEDIATE 0x10
-#define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
-#define SAM_STAT_RESERVATION_CONFLICT 0x18
-#define SAM_STAT_COMMAND_TERMINATED 0x22 /* obsolete in SAM-3 */
-#define SAM_STAT_TASK_SET_FULL 0x28
-#define SAM_STAT_ACA_ACTIVE 0x30
-#define SAM_STAT_TASK_ABORTED 0x40
+enum sam_status {
+ SAM_STAT_GOOD = 0x00,
+ SAM_STAT_CHECK_CONDITION = 0x02,
+ SAM_STAT_CONDITION_MET = 0x04,
+ SAM_STAT_BUSY = 0x08,
+ SAM_STAT_INTERMEDIATE = 0x10,
+ SAM_STAT_INTERMEDIATE_CONDITION_MET = 0x14,
+ SAM_STAT_RESERVATION_CONFLICT = 0x18,
+ SAM_STAT_COMMAND_TERMINATED = 0x22, /* obsolete in SAM-3 */
+ SAM_STAT_TASK_SET_FULL = 0x28,
+ SAM_STAT_ACA_ACTIVE = 0x30,
+ SAM_STAT_TASK_ABORTED = 0x40,
+};
#define STATUS_MASK 0xfe
/*
diff --git a/include/scsi/scsi_status.h b/include/scsi/scsi_status.h
new file mode 100644
index 000000000000..31d30cee1869
--- /dev/null
+++ b/include/scsi/scsi_status.h
@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _SCSI_SCSI_STATUS_H
+#define _SCSI_SCSI_STATUS_H
+
+#include <linux/types.h>
+#include <scsi/scsi_proto.h>
+
+/* Message codes. */
+enum scsi_msg_byte {
+ COMMAND_COMPLETE = 0x00,
+ EXTENDED_MESSAGE = 0x01,
+ SAVE_POINTERS = 0x02,
+ RESTORE_POINTERS = 0x03,
+ DISCONNECT = 0x04,
+ INITIATOR_ERROR = 0x05,
+ ABORT_TASK_SET = 0x06,
+ MESSAGE_REJECT = 0x07,
+ NOP = 0x08,
+ MSG_PARITY_ERROR = 0x09,
+ LINKED_CMD_COMPLETE = 0x0a,
+ LINKED_FLG_CMD_COMPLETE = 0x0b,
+ TARGET_RESET = 0x0c,
+ ABORT_TASK = 0x0d,
+ CLEAR_TASK_SET = 0x0e,
+ INITIATE_RECOVERY = 0x0f, /* SCSI-II only */
+ RELEASE_RECOVERY = 0x10, /* SCSI-II only */
+ TERMINATE_IO_PROC = 0x11, /* SCSI-II only */
+ CLEAR_ACA = 0x16,
+ LOGICAL_UNIT_RESET = 0x17,
+ SIMPLE_QUEUE_TAG = 0x20,
+ HEAD_OF_QUEUE_TAG = 0x21,
+ ORDERED_QUEUE_TAG = 0x22,
+ IGNORE_WIDE_RESIDUE = 0x23,
+ ACA = 0x24,
+ QAS_REQUEST = 0x55,
+
+ /* Old SCSI2 names, don't use in new code */
+ BUS_DEVICE_RESET = TARGET_RESET,
+ ABORT = ABORT_TASK_SET,
+};
+
+/* Host byte codes. */
+enum scsi_host_status {
+ DID_OK = 0x00, /* NO error */
+ DID_NO_CONNECT = 0x01, /* Couldn't connect before timeout period */
+ DID_BUS_BUSY = 0x02, /* BUS stayed busy through time out period */
+ DID_TIME_OUT = 0x03, /* TIMED OUT for other reason */
+ DID_BAD_TARGET = 0x04, /* BAD target. */
+ DID_ABORT = 0x05, /* Told to abort for some other reason */
+ DID_PARITY = 0x06, /* Parity error */
+ DID_ERROR = 0x07, /* Internal error */
+ DID_RESET = 0x08, /* Reset by somebody. */
+ DID_BAD_INTR = 0x09, /* Got an interrupt we weren't expecting. */
+ DID_PASSTHROUGH = 0x0a, /* Force command past mid-layer */
+ DID_SOFT_ERROR = 0x0b, /* The low level driver just wish a retry */
+ DID_IMM_RETRY = 0x0c, /* Retry without decrementing retry count */
+ DID_REQUEUE = 0x0d, /* Requeue command (no immediate retry) also
+ * without decrementing the retry count */
+ 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 */
+ DID_TRANSPORT_FAILFAST = 0x0f, /* Transport class fastfailed the io */
+ DID_TARGET_FAILURE = 0x10, /* Permanent target failure, do not retry on
+ * other paths */
+ DID_NEXUS_FAILURE = 0x11, /* Permanent nexus failure, retry on other
+ * paths might yield different results */
+ DID_ALLOC_FAILURE = 0x12, /* Space allocation on the device failed */
+ DID_MEDIUM_ERROR = 0x13, /* Medium error */
+ DID_TRANSPORT_MARGINAL = 0x14, /* Transport marginal errors */
+};
+
+#endif /* _SCSI_SCSI_STATUS_H */