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/*-
* 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.
*
* $FreeBSD$
*/
/*
* Debugging levels:
* 0 - quiet, only emit warnings
* 1 - noisy, emit major function points and things done
* 2 - extremely noisy, emit trace items in loops, etc.
*/
#ifdef MLX_DEBUG
#define debug(level, fmt, args...) do { if (level <= MLX_DEBUG) printf("%s: " fmt "\n", __FUNCTION__ , ##args); } while(0)
#define debug_called(level) do { if (level <= MLX_DEBUG) printf(__FUNCTION__ ": called\n"); } while(0)
#else
#define debug(level, fmt, args...)
#define debug_called(level)
#endif
/*
* Regardless of the actual capacity of the controller, we will allocate space
* for 64 s/g entries. Typically controllers support 17 or 33 entries (64k or
* 128k maximum transfer assuming 4k page size and non-optimal alignment), but
* making that fit cleanly without crossing page boundaries requires rounding up
* to the next power of two.
*/
#define MLX_NSEG 64
#define MLX_NSLOTS 256 /* max number of command slots */
#define MLX_MAXDRIVES 32 /* max number of system drives */
/*
* 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;
dev_t mlx_dev_t;
struct resource *mlx_mem; /* mailbox interface window */
int mlx_mem_rid;
int mlx_mem_type;
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_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 */
mlx_bioq mlx_bioq; /* 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 */
u_int16_t mlx_lastevent; /* sequence number of the last event we recorded */
int mlx_currevent; /* sequence number last time we looked */
int mlx_background; /* if != 0 rebuild or check is in progress */
#define MLX_BACKGROUND_CHECK 1 /* we started a check */
#define MLX_BACKGROUND_REBUILD 2 /* we started a rebuild */
#define MLX_BACKGROUND_SPONTANEOUS 3 /* it just happened somehow */
struct mlx_rebuild_status mlx_rebuildstat; /* last rebuild status */
struct mlx_pause mlx_pause; /* pending pause operation details */
int mlx_locks; /* reentrancy avoidance */
int mlx_flags;
#define MLX_SPINUP_REPORTED (1<<0) /* "spinning up drives" message displayed */
#define MLX_EVENTLOG_BUSY (1<<1) /* currently reading event log */
/* interface-specific accessor functions */
int mlx_iftype; /* interface protocol */
#define MLX_IFTYPE_2 2
#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);
int (* mlx_fw_handshake)(struct mlx_softc *sc, int *error, int *param1, int *param2);
#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;
extern devclass_t mlxd_devclass;
/*
* Mylex System Disk driver
*/
struct mlxd_softc
{
device_t mlxd_dev;
dev_t mlxd_dev_t;
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, mlx_bio *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);
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