161 lines
4.9 KiB
C
161 lines
4.9 KiB
C
/*-
|
|
* Data structures and definitions for SCSI Interface Modules (SIMs).
|
|
*
|
|
* Copyright (c) 1997 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _CAM_CAM_SIM_H
|
|
#define _CAM_CAM_SIM_H 1
|
|
|
|
#ifdef _KERNEL
|
|
|
|
/*
|
|
* The sim driver creates a sim for each controller. The sim device
|
|
* queue is separately created in order to allow resource sharing between
|
|
* sims. For instance, a driver may create one sim for each channel of
|
|
* a multi-channel controller and use the same queue for each channel.
|
|
* In this way, the queue resources are shared across all the channels
|
|
* of the multi-channel controller.
|
|
*/
|
|
|
|
struct cam_sim;
|
|
struct cam_devq;
|
|
|
|
typedef void (*sim_action_func)(struct cam_sim *sim, union ccb *ccb);
|
|
typedef void (*sim_poll_func)(struct cam_sim *sim);
|
|
|
|
struct cam_devq * cam_simq_alloc(u_int32_t max_sim_transactions);
|
|
void cam_simq_free(struct cam_devq *devq);
|
|
|
|
struct cam_sim * cam_sim_alloc(sim_action_func sim_action,
|
|
sim_poll_func sim_poll,
|
|
const char *sim_name,
|
|
void *softc,
|
|
u_int32_t unit,
|
|
struct mtx *mtx,
|
|
int max_dev_transactions,
|
|
int max_tagged_dev_transactions,
|
|
struct cam_devq *queue);
|
|
void cam_sim_free(struct cam_sim *sim, int free_devq);
|
|
void cam_sim_hold(struct cam_sim *sim);
|
|
void cam_sim_release(struct cam_sim *sim);
|
|
|
|
/* Optional sim attributes may be set with these. */
|
|
void cam_sim_set_path(struct cam_sim *sim, u_int32_t path_id);
|
|
|
|
|
|
|
|
/* Convenience routines for accessing sim attributes. */
|
|
static __inline u_int32_t cam_sim_path(struct cam_sim *sim);
|
|
static __inline const char * cam_sim_name(struct cam_sim *sim);
|
|
static __inline void * cam_sim_softc(struct cam_sim *sim);
|
|
static __inline u_int32_t cam_sim_unit(struct cam_sim *sim);
|
|
static __inline u_int32_t cam_sim_bus(struct cam_sim *sim);
|
|
|
|
|
|
|
|
/* Generically useful offsets into the sim private area */
|
|
#define spriv_ptr0 sim_priv.entries[0].ptr
|
|
#define spriv_ptr1 sim_priv.entries[1].ptr
|
|
#define spriv_field0 sim_priv.entries[0].field
|
|
#define spriv_field1 sim_priv.entries[1].field
|
|
|
|
/*
|
|
* The sim driver should not access anything directly from this
|
|
* structure.
|
|
*/
|
|
struct cam_sim {
|
|
sim_action_func sim_action;
|
|
sim_poll_func sim_poll;
|
|
const char *sim_name;
|
|
void *softc;
|
|
struct mtx *mtx;
|
|
TAILQ_HEAD(, ccb_hdr) sim_doneq;
|
|
TAILQ_ENTRY(cam_sim) links;
|
|
u_int32_t path_id;/* The Boot device may set this to 0? */
|
|
u_int32_t unit_number;
|
|
u_int32_t bus_id;
|
|
int max_tagged_dev_openings;
|
|
int max_dev_openings;
|
|
u_int32_t flags;
|
|
#define CAM_SIM_REL_TIMEOUT_PENDING 0x01
|
|
#define CAM_SIM_MPSAFE 0x02
|
|
#define CAM_SIM_ON_DONEQ 0x04
|
|
#define CAM_SIM_POLLED 0x08
|
|
#define CAM_SIM_BATCH 0x10
|
|
struct callout callout;
|
|
struct cam_devq *devq; /* Device Queue to use for this SIM */
|
|
int refcount; /* References to the SIM. */
|
|
|
|
/* "Pool" of inactive ccbs managed by xpt_get_ccb and xpt_release_ccb */
|
|
SLIST_HEAD(,ccb_hdr) ccb_freeq;
|
|
/*
|
|
* Maximum size of ccb pool. Modified as devices are added/removed
|
|
* or have their * opening counts changed.
|
|
*/
|
|
u_int max_ccbs;
|
|
/* Current count of allocated ccbs */
|
|
u_int ccb_count;
|
|
|
|
};
|
|
|
|
#define CAM_SIM_LOCK(sim) mtx_lock((sim)->mtx)
|
|
#define CAM_SIM_UNLOCK(sim) mtx_unlock((sim)->mtx)
|
|
|
|
static __inline u_int32_t
|
|
cam_sim_path(struct cam_sim *sim)
|
|
{
|
|
return (sim->path_id);
|
|
}
|
|
|
|
static __inline const char *
|
|
cam_sim_name(struct cam_sim *sim)
|
|
{
|
|
return (sim->sim_name);
|
|
}
|
|
|
|
static __inline void *
|
|
cam_sim_softc(struct cam_sim *sim)
|
|
{
|
|
return (sim->softc);
|
|
}
|
|
|
|
static __inline u_int32_t
|
|
cam_sim_unit(struct cam_sim *sim)
|
|
{
|
|
return (sim->unit_number);
|
|
}
|
|
|
|
static __inline u_int32_t
|
|
cam_sim_bus(struct cam_sim *sim)
|
|
{
|
|
return (sim->bus_id);
|
|
}
|
|
|
|
#endif /* _KERNEL */
|
|
#endif /* _CAM_CAM_SIM_H */
|