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| Current File : //compat/linux/proc/68247/root/usr/src/sys/cam/cam_xpt_internal.h |
/*-
* Copyright 2009 Scott Long
* 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.
*
* $FreeBSD: release/9.1.0/sys/cam/cam_xpt_internal.h 223081 2011-06-14 14:53:17Z gibbs $
*/
#ifndef _CAM_CAM_XPT_INTERNAL_H
#define _CAM_CAM_XPT_INTERNAL_H 1
/* Forward Declarations */
struct cam_eb;
struct cam_et;
struct cam_ed;
typedef struct cam_ed * (*xpt_alloc_device_func)(struct cam_eb *bus,
struct cam_et *target,
lun_id_t lun_id);
typedef void (*xpt_release_device_func)(struct cam_ed *device);
typedef void (*xpt_action_func)(union ccb *start_ccb);
typedef void (*xpt_dev_async_func)(u_int32_t async_code,
struct cam_eb *bus,
struct cam_et *target,
struct cam_ed *device,
void *async_arg);
typedef void (*xpt_announce_periph_func)(struct cam_periph *periph);
struct xpt_xport {
xpt_alloc_device_func alloc_device;
xpt_release_device_func reldev;
xpt_action_func action;
xpt_dev_async_func async;
xpt_announce_periph_func announce;
};
/*
* Structure for queueing a device in a run queue.
* There is one run queue for allocating new ccbs,
* and another for sending ccbs to the controller.
*/
struct cam_ed_qinfo {
cam_pinfo pinfo;
struct cam_ed *device;
};
/*
* The CAM EDT (Existing Device Table) contains the device information for
* all devices for all busses in the system. The table contains a
* cam_ed structure for each device on the bus.
*/
struct cam_ed {
TAILQ_ENTRY(cam_ed) links;
struct cam_ed_qinfo alloc_ccb_entry;
struct cam_ed_qinfo send_ccb_entry;
struct cam_et *target;
struct cam_sim *sim;
lun_id_t lun_id;
struct camq drvq; /*
* Queue of type drivers wanting to do
* work on this device.
*/
struct cam_ccbq ccbq; /* Queue of pending ccbs */
struct async_list asyncs; /* Async callback info for this B/T/L */
struct periph_list periphs; /* All attached devices */
u_int generation; /* Generation number */
struct cam_periph *owner; /* Peripheral driver's ownership tag */
void *quirk; /* Oddities about this device */
u_int maxtags;
u_int mintags;
cam_proto protocol;
u_int protocol_version;
cam_xport transport;
u_int transport_version;
struct scsi_inquiry_data inq_data;
uint8_t *supported_vpds;
uint8_t supported_vpds_len;
uint32_t device_id_len;
uint8_t *device_id;
uint8_t physpath_len;
uint8_t *physpath; /* physical path string form */
struct ata_params ident_data;
u_int8_t inq_flags; /*
* Current settings for inquiry flags.
* This allows us to override settings
* like disconnection and tagged
* queuing for a device.
*/
u_int8_t queue_flags; /* Queue flags from the control page */
u_int8_t serial_num_len;
u_int8_t *serial_num;
u_int32_t flags;
#define CAM_DEV_UNCONFIGURED 0x01
#define CAM_DEV_REL_TIMEOUT_PENDING 0x02
#define CAM_DEV_REL_ON_COMPLETE 0x04
#define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08
#define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10
#define CAM_DEV_TAG_AFTER_COUNT 0x20
#define CAM_DEV_INQUIRY_DATA_VALID 0x40
#define CAM_DEV_IN_DV 0x80
#define CAM_DEV_DV_HIT_BOTTOM 0x100
#define CAM_DEV_IDENTIFY_DATA_VALID 0x200
u_int32_t tag_delay_count;
#define CAM_TAG_DELAY_COUNT 5
u_int32_t tag_saved_openings;
u_int32_t refcount;
struct callout callout;
};
/*
* Each target is represented by an ET (Existing Target). These
* entries are created when a target is successfully probed with an
* identify, and removed when a device fails to respond after a number
* of retries, or a bus rescan finds the device missing.
*/
struct cam_et {
TAILQ_HEAD(, cam_ed) ed_entries;
TAILQ_ENTRY(cam_et) links;
struct cam_eb *bus;
target_id_t target_id;
u_int32_t refcount;
u_int generation;
struct timeval last_reset;
u_int rpl_size;
struct scsi_report_luns_data *luns;
};
/*
* Each bus is represented by an EB (Existing Bus). These entries
* are created by calls to xpt_bus_register and deleted by calls to
* xpt_bus_deregister.
*/
struct cam_eb {
TAILQ_HEAD(, cam_et) et_entries;
TAILQ_ENTRY(cam_eb) links;
path_id_t path_id;
struct cam_sim *sim;
struct timeval last_reset;
u_int32_t flags;
#define CAM_EB_RUNQ_SCHEDULED 0x01
u_int32_t refcount;
u_int generation;
device_t parent_dev;
struct xpt_xport *xport;
};
struct cam_path {
struct cam_periph *periph;
struct cam_eb *bus;
struct cam_et *target;
struct cam_ed *device;
};
struct xpt_xport * scsi_get_xport(void);
struct xpt_xport * ata_get_xport(void);
struct cam_ed * xpt_alloc_device(struct cam_eb *bus,
struct cam_et *target,
lun_id_t lun_id);
void xpt_acquire_device(struct cam_ed *device);
void xpt_release_device(struct cam_ed *device);
int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
u_int32_t new_priority);
u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings);
void xpt_start_tags(struct cam_path *path);
void xpt_stop_tags(struct cam_path *path);
MALLOC_DECLARE(M_CAMXPT);
#endif