cam_xpt_internal.h

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/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * 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
 
#include <sys/taskqueue.h>
 
/* 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);
typedef void (*xpt_announce_periph_sbuf_func)(struct cam_periph *periph, struct sbuf *sbuf);
 
struct xpt_xport_ops {
        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;
        xpt_announce_periph_sbuf_func announce_sbuf;
};
 
struct xpt_xport {
        cam_xport               xport;
        const char              *name;
        struct xpt_xport_ops    *ops;
};
 
SET_DECLARE(cam_xpt_xport_set, struct xpt_xport);
#define CAM_XPT_XPORT(data)                             \
        DATA_SET(cam_xpt_xport_set, data)
 
typedef void (*xpt_proto_announce_func)(struct cam_ed *);
typedef void (*xpt_proto_announce_sbuf_func)(struct cam_ed *, struct sbuf *);
typedef void (*xpt_proto_debug_out_func)(union ccb *);
 
struct xpt_proto_ops {
        xpt_proto_announce_func announce;
        xpt_proto_announce_sbuf_func    announce_sbuf;
        xpt_proto_announce_func denounce;
        xpt_proto_announce_sbuf_func    denounce_sbuf;
        xpt_proto_debug_out_func debug_out;
};
 
struct xpt_proto {
        cam_proto               proto;
        const char              *name;
        struct xpt_proto_ops    *ops;
};
 
SET_DECLARE(cam_xpt_proto_set, struct xpt_proto);
#define CAM_XPT_PROTO(data)                             \
        DATA_SET(cam_xpt_proto_set, data)
 
/*
 * The CAM EDT (Existing Device Table) contains the device information for
 * all devices for all buses in the system.  The table contains a
 * cam_ed structure for each device on the bus.
 */
struct cam_ed {
        cam_pinfo        devq_entry;
        TAILQ_ENTRY(cam_ed) links;
        struct  cam_et   *target;
        struct  cam_sim  *sim;
        lun_id_t         lun_id;
        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 */
        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;
        uint32_t         ext_inq_len;
        uint8_t          *ext_inq;
        uint8_t          physpath_len;
        uint8_t          *physpath;     /* physical path string form */
        uint32_t         rcap_len;
        uint8_t          *rcap_buf;
        struct           ata_params ident_data;
        struct           mmc_params mmc_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_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;
        STAILQ_ENTRY(cam_ed) highpowerq_entry;
        struct mtx       device_mtx;
        struct task      device_destroy_task;
        struct nvme_controller_data *nvme_cdata;
        struct nvme_namespace_data *nvme_data;
};
 
/*
 * 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;
        struct mtx      luns_mtx;       /* Protection for luns field. */
};
 
/*
 * 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 mtx           eb_mtx;    /* Bus topology mutex. */
};
 
struct cam_path {
        struct cam_periph *periph;
        struct cam_eb     *bus;
        struct cam_et     *target;
        struct cam_ed     *device;
};
 
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);
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