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author | gibbs <gibbs@FreeBSD.org> | 1998-09-15 06:33:23 +0000 |
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committer | gibbs <gibbs@FreeBSD.org> | 1998-09-15 06:33:23 +0000 |
commit | 855593c295ac3878b7f73a83edd07f899eccc38d (patch) | |
tree | 436fdb7e7e00d8403854b3bc0865866cd885e9dd /sys/cam/cam_periph.h | |
parent | bbc0682d67a7e0c50ade831509abd8c3e119db5c (diff) | |
download | FreeBSD-src-855593c295ac3878b7f73a83edd07f899eccc38d.zip FreeBSD-src-855593c295ac3878b7f73a83edd07f899eccc38d.tar.gz |
CAM Transport Layer (XPT).
Submitted by: The CAM Team
Diffstat (limited to 'sys/cam/cam_periph.h')
-rw-r--r-- | sys/cam/cam_periph.h | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/sys/cam/cam_periph.h b/sys/cam/cam_periph.h new file mode 100644 index 0000000..04437d3 --- /dev/null +++ b/sys/cam/cam_periph.h @@ -0,0 +1,135 @@ +/* + * Data structures and definitions for CAM peripheral ("type") drivers. + * + * Copyright (c) 1997, 1998 Justin T. Gibbs. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification, immediately at the beginning of the file. + * 2. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $Id$ + */ + +#ifndef _CAM_CAM_PERIPH_H +#define _CAM_CAM_PERIPH_H 1 + +#include <sys/queue.h> + +#ifdef KERNEL + +extern struct linker_set periphdriver_set; + +typedef void (periph_init_t)(void); /* + * Callback informing the peripheral driver + * it can perform it's initialization since + * the XPT is now fully initialized. + */ +typedef periph_init_t *periph_init_func_t; + +struct periph_driver { + periph_init_func_t init; + char *driver_name; + TAILQ_HEAD(,cam_periph) units; + u_int generation; +}; + +typedef enum { + CAM_PERIPH_BIO, + CAM_PERIPH_NET +} cam_periph_type; + +/* Generically usefull offsets into the peripheral private area */ +#define ppriv_ptr0 periph_priv.entries[0].ptr +#define ppriv_ptr1 periph_priv.entries[1].ptr +#define ppriv_field0 periph_priv.entries[0].field +#define ppriv_field1 periph_priv.entries[1].field + +typedef void periph_start_t (struct cam_periph *periph, + union ccb *start_ccb); +typedef cam_status periph_ctor_t (struct cam_periph *periph, + void *arg); +typedef void periph_dtor_t (struct cam_periph *periph); + +struct cam_periph { + cam_pinfo pinfo; + periph_start_t *periph_start; + periph_dtor_t *periph_dtor; + char *periph_name; + struct cam_path *path; /* Compiled path to device */ + void *softc; + u_int32_t unit_number; + cam_periph_type type; + u_int32_t flags; +#define CAM_PERIPH_RUNNING 0x01 +#define CAM_PERIPH_LOCKED 0x02 +#define CAM_PERIPH_LOCK_WANTED 0x04 +#define CAM_PERIPH_INVALID 0x08 +#define CAM_PERIPH_NEW_DEV_FOUND 0x10 + u_int32_t immediate_priority; + u_int32_t refcount; + SLIST_HEAD(, ccb_hdr) ccb_list; /* For "immediate" requests */ + SLIST_ENTRY(cam_periph) periph_links; + TAILQ_ENTRY(cam_periph) unit_links; + ac_callback_t *deferred_callback; + ac_code deferred_ac; +}; + +#define CAM_PERIPH_MAXMAPS 2 + +struct cam_periph_map_info { + int num_bufs_used; + struct buf *bp[CAM_PERIPH_MAXMAPS]; +}; + +cam_status cam_periph_alloc(periph_ctor_t*, periph_dtor_t*, periph_start_t*, + char *name, cam_periph_type type, struct cam_path *, ac_callback_t *, ac_code, void *arg); +struct cam_periph *cam_periph_find(struct cam_path *path, char *name); +int cam_periph_lock(struct cam_periph *periph, int priority); +void cam_periph_unlock(struct cam_periph *periph); +cam_status cam_periph_acquire(struct cam_periph *periph); +void cam_periph_release(struct cam_periph *periph); +void cam_periph_invalidate(struct cam_periph *periph); +int cam_periph_mapmem(union ccb *ccb, + struct cam_periph_map_info *mapinfo); +void cam_periph_unmapmem(union ccb *ccb, + struct cam_periph_map_info *mapinfo); +union ccb *cam_periph_getccb(struct cam_periph *periph, + u_int32_t priority); +void cam_periph_ccbwait(union ccb *ccb); +int cam_periph_runccb(union ccb *ccb, + int (*error_routine)(union ccb *ccb, + cam_flags camflags, + u_int32_t sense_flags), + cam_flags camflags, u_int32_t sense_flags, + struct devstat *ds); +int cam_periph_ioctl(struct cam_periph *periph, int cmd, + caddr_t addr, + int (*error_routine)(union ccb *ccb, + cam_flags camflags, + u_int32_t sense_flags)); +u_int32_t cam_release_devq(struct cam_path *path, u_int32_t relsim_flags, + u_int32_t opening_reduction, u_int32_t timeout, + int getcount_only); +int cam_periph_error(union ccb *ccb, cam_flags camflags, + u_int32_t sense_flags, union ccb *save_ccb); + +#endif /* KERNEL */ +#endif /* _CAM_CAM_PERIPH_H */ |