freebsd-dev/sys/dev/mlx/mlxvar.h
Mike Smith 9eee27f16d Updates resulting from new documentation from Mylex and some cleaning:
- Don't keep private copies of some of the data fields from the
   ENQUIRY and ENQUIRY2 commands.  Instead, standardise on the ENQUIRY2
   command for initial adapter information, and keep a copy of the entire
   structure.  Refer to it where appropriate.

 - Move all of the controller description functionality into a new
   function.  Print lots more controller data if bootverbose is set.
   Add knowledge of the DAC960 PR, PT, PTL0 and PRL controllers, rename
   the 960PTL -> PTL0 and 1100P -> 1100PVX.

 - Correctly terminate an error message.

The controller interface procedures have been reviewed against the
Mylex-supplied documentation; no changes appear necessary at this
time.
1999-12-22 01:21:28 +00:00

220 lines
7.7 KiB
C

/*-
* Copyright (c) 1999 Michael Smith
* 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.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 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.
*
* $FreeBSD$
*/
/*
* We could actually use all 33 segments, but using only 32 means that
* each scatter/gather map is 256 bytes in size, and thus we don't have to worry about
* maps crossing page boundaries.
*/
#define MLX_NSEG 32 /* max scatter/gather segments we use */
#define MLX_NSLOTS 256 /* max number of command slots */
#define MLX_MAXDRIVES 32
/*
* Structure describing a System Drive as attached to the controller.
*/
struct mlx_sysdrive
{
/* from MLX_CMD_ENQSYSDRIVE */
u_int32_t ms_size;
int ms_state;
int ms_raidlevel;
/* synthetic geometry */
int ms_cylinders;
int ms_heads;
int ms_sectors;
/* handle for attached driver */
device_t ms_disk;
};
/*
* Per-command control structure.
*/
struct mlx_command
{
TAILQ_ENTRY(mlx_command) mc_link; /* list linkage */
struct mlx_softc *mc_sc; /* controller that owns us */
u_int8_t mc_slot; /* command slot we occupy */
u_int16_t mc_status; /* command completion status */
time_t mc_timeout; /* when this command expires */
u_int8_t mc_mailbox[16]; /* command mailbox */
u_int32_t mc_sgphys; /* physical address of s/g array in controller space */
int mc_nsgent; /* number of entries in s/g map */
int mc_flags;
#define MLX_CMD_DATAIN (1<<0)
#define MLX_CMD_DATAOUT (1<<1)
#define MLX_CMD_PRIORITY (1<<2) /* high-priority command */
void *mc_data; /* data buffer */
size_t mc_length;
bus_dmamap_t mc_dmamap; /* DMA map for data */
u_int32_t mc_dataphys; /* data buffer base address controller space */
void (* mc_complete)(struct mlx_command *mc); /* completion handler */
void *mc_private; /* submitter-private data or wait channel */
};
/*
* Per-controller structure.
*/
struct mlx_softc
{
/* bus connections */
device_t mlx_dev;
struct resource *mlx_mem; /* mailbox interface window */
bus_space_handle_t mlx_bhandle; /* bus space handle */
bus_space_tag_t mlx_btag; /* bus space tag */
bus_dma_tag_t mlx_parent_dmat;/* parent DMA tag */
bus_dma_tag_t mlx_buffer_dmat;/* data buffer DMA tag */
struct resource *mlx_irq; /* interrupt */
void *mlx_intr; /* interrupt handle */
/* scatter/gather lists and their controller-visible mappings */
struct mlx_sgentry *mlx_sgtable; /* s/g lists */
u_int32_t mlx_sgbusaddr; /* s/g table base address in bus space */
bus_dma_tag_t mlx_sg_dmat; /* s/g buffer DMA tag */
bus_dmamap_t mlx_sg_dmamap; /* map for s/g buffers */
/* controller limits and features */
struct mlx_enquiry2 *mlx_enq2;
int mlx_maxiop; /* hard maximum number of commands */
int mlx_feature; /* controller features/quirks */
#define MLX_FEAT_PAUSEWORKS (1<<0) /* channel pause works as expected */
/* controller queues and arrays */
TAILQ_HEAD(, mlx_command) mlx_freecmds; /* command structures available for reuse */
TAILQ_HEAD(, mlx_command) mlx_work; /* active commands */
struct mlx_command *mlx_busycmd[MLX_NSLOTS]; /* busy commands */
int mlx_busycmds; /* count of busy commands */
struct mlx_sysdrive mlx_sysdrive[MLX_MAXDRIVES]; /* system drives */
struct buf_queue_head mlx_bufq; /* outstanding I/O operations */
int mlx_waitbufs; /* number of bufs awaiting commands */
/* controller status */
int mlx_geom;
#define MLX_GEOM_128_32 0 /* geoemetry translation modes */
#define MLX_GEOM_256_63 1
int mlx_state;
#define MLX_STATE_INTEN (1<<0) /* interrupts have been enabled */
#define MLX_STATE_SHUTDOWN (1<<1) /* controller is shut down */
#define MLX_STATE_OPEN (1<<2) /* control device is open */
#define MLX_STATE_SUSPEND (1<<3) /* controller is suspended */
struct callout_handle mlx_timeout; /* periodic status monitor */
time_t mlx_lastpoll; /* last time_second we polled for status */
int mlx_lastevent; /* sequence number of the last event we recorded */
int mlx_currevent; /* sequence number last time we looked */
int mlx_rebuild; /* if >= 0, drive is being rebuilt */
u_int32_t mlx_rebuildstat;/* blocks left to rebuild if active */
int mlx_check; /* if >= 0, drive is being checked */
struct mlx_pause mlx_pause; /* pending pause operation details */
int mlx_locks; /* reentrancy avoidance */
/* interface-specific accessor functions */
int mlx_iftype; /* interface protocol */
#define MLX_IFTYPE_3 3
#define MLX_IFTYPE_4 4
#define MLX_IFTYPE_5 5
int (* mlx_tryqueue)(struct mlx_softc *sc, struct mlx_command *mc);
int (* mlx_findcomplete)(struct mlx_softc *sc, u_int8_t *slot, u_int16_t *status);
void (* mlx_intaction)(struct mlx_softc *sc, int action);
#define MLX_INTACTION_DISABLE 0
#define MLX_INTACTION_ENABLE 1
};
/*
* Simple (stupid) locks.
*
* Note that these are designed to avoid reentrancy, not concurrency, and will
* need to be replaced with something better.
*/
#define MLX_LOCK_COMPLETING (1<<0)
#define MLX_LOCK_STARTING (1<<1)
static __inline int
mlx_lock_tas(struct mlx_softc *sc, int lock)
{
if ((sc)->mlx_locks & (lock))
return(1);
atomic_set_int(&sc->mlx_locks, lock);
return(0);
}
static __inline void
mlx_lock_clr(struct mlx_softc *sc, int lock)
{
atomic_clear_int(&sc->mlx_locks, lock);
}
/*
* Interface between bus connections and driver core.
*/
extern void mlx_free(struct mlx_softc *sc);
extern int mlx_attach(struct mlx_softc *sc);
extern void mlx_startup(struct mlx_softc *sc);
extern void mlx_intr(void *data);
extern int mlx_detach(device_t dev);
extern int mlx_shutdown(device_t dev);
extern int mlx_suspend(device_t dev);
extern int mlx_resume(device_t dev);
extern d_open_t mlx_open;
extern d_close_t mlx_close;
extern d_ioctl_t mlx_ioctl;
extern devclass_t mlx_devclass;
/*
* Mylex System Disk driver
*/
struct mlxd_softc
{
device_t mlxd_dev;
struct mlx_softc *mlxd_controller;
struct mlx_sysdrive *mlxd_drive;
struct disk mlxd_disk;
struct devstat mlxd_stats;
struct disklabel mlxd_label;
int mlxd_unit;
int mlxd_flags;
#define MLXD_OPEN (1<<0) /* drive is open (can't shut down) */
};
/*
* Interface between driver core and disk driver (should be using a bus?)
*/
extern int mlx_submit_buf(struct mlx_softc *sc, struct buf *bp);
extern int mlx_submit_ioctl(struct mlx_softc *sc, struct mlx_sysdrive *drive, u_long cmd,
caddr_t addr, int32_t flag, struct proc *p);
extern void mlxd_intr(void *data);