30a4094f86
- Move tagged queueing control from ADA to ATA XPT. It allows to control device command queue length correctly. First step to support < 32 tags. - Limit queue for non-tagged devices by 2 slots for ahci(4) and siis(4). - Implement quirk matching for ATA devices. - Move xpt_schedule_dev_sendq() from header to source file. - Move delayed queue shrinking to the more expected place - element freeing. - Remove some SCSIsms in ATA.
185 lines
5.9 KiB
C
185 lines
5.9 KiB
C
/*-
|
|
* 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#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,
|
|
char *announce_string);
|
|
|
|
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;
|
|
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;
|
|
};
|
|
|
|
/*
|
|
* 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);
|
|
void xpt_run_dev_sendq(struct cam_eb *bus);
|
|
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
|