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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /include/scsi/scsi_dh.h | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/scsi/scsi_dh.h')
-rw-r--r-- | include/scsi/scsi_dh.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/include/scsi/scsi_dh.h b/include/scsi/scsi_dh.h new file mode 100644 index 000000000..2852e470a --- /dev/null +++ b/include/scsi/scsi_dh.h @@ -0,0 +1,89 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Header file for SCSI device handler infrastruture. + * + * Modified version of patches posted by Mike Christie <michaelc@cs.wisc.edu> + * + * Copyright IBM Corporation, 2007 + * Authors: + * Chandra Seetharaman <sekharan@us.ibm.com> + * Mike Anderson <andmike@linux.vnet.ibm.com> + */ + +#include <scsi/scsi_device.h> + +enum { + SCSI_DH_OK = 0, + /* + * device errors + */ + SCSI_DH_DEV_FAILED, /* generic device error */ + SCSI_DH_DEV_TEMP_BUSY, + SCSI_DH_DEV_UNSUPP, /* device handler not supported */ + SCSI_DH_DEVICE_MAX, /* max device blkerr definition */ + + /* + * transport errors + */ + SCSI_DH_NOTCONN = SCSI_DH_DEVICE_MAX + 1, + SCSI_DH_CONN_FAILURE, + SCSI_DH_TRANSPORT_MAX, /* max transport blkerr definition */ + + /* + * driver and generic errors + */ + SCSI_DH_IO = SCSI_DH_TRANSPORT_MAX + 1, /* generic error */ + SCSI_DH_INVALID_IO, + SCSI_DH_RETRY, /* retry the req, but not immediately */ + SCSI_DH_IMM_RETRY, /* immediately retry the req */ + SCSI_DH_TIMED_OUT, + SCSI_DH_RES_TEMP_UNAVAIL, + SCSI_DH_DEV_OFFLINED, + SCSI_DH_NOMEM, + SCSI_DH_NOSYS, + SCSI_DH_DRIVER_MAX, +}; + +typedef void (*activate_complete)(void *, int); +struct scsi_device_handler { + /* Used by the infrastructure */ + struct list_head list; /* list of scsi_device_handlers */ + + /* Filled by the hardware handler */ + struct module *module; + const char *name; + int (*check_sense)(struct scsi_device *, struct scsi_sense_hdr *); + int (*attach)(struct scsi_device *); + void (*detach)(struct scsi_device *); + int (*activate)(struct scsi_device *, activate_complete, void *); + blk_status_t (*prep_fn)(struct scsi_device *, struct request *); + int (*set_params)(struct scsi_device *, const char *); + void (*rescan)(struct scsi_device *); +}; + +#ifdef CONFIG_SCSI_DH +extern int scsi_dh_activate(struct request_queue *, activate_complete, void *); +extern int scsi_dh_attach(struct request_queue *, const char *); +extern const char *scsi_dh_attached_handler_name(struct request_queue *, gfp_t); +extern int scsi_dh_set_params(struct request_queue *, const char *); +#else +static inline int scsi_dh_activate(struct request_queue *req, + activate_complete fn, void *data) +{ + fn(data, 0); + return 0; +} +static inline int scsi_dh_attach(struct request_queue *req, const char *name) +{ + return SCSI_DH_NOSYS; +} +static inline const char *scsi_dh_attached_handler_name(struct request_queue *q, + gfp_t gfp) +{ + return NULL; +} +static inline int scsi_dh_set_params(struct request_queue *req, const char *params) +{ + return -SCSI_DH_NOSYS; +} +#endif |