mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-30 12:04:07 +00:00
278 lines
9.5 KiB
C
278 lines
9.5 KiB
C
/*-
|
|
* Copyright (c) 2000 Michael Smith
|
|
* Copyright (c) 2000 BSDi
|
|
* 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifdef TWE_DEBUG
|
|
#define debug(level, fmt, args...) \
|
|
do { \
|
|
if (level <= TWE_DEBUG) printf("%s: " fmt "\n", __func__ , ##args); \
|
|
} while(0)
|
|
#define debug_called(level) \
|
|
do { \
|
|
if (level <= TWE_DEBUG) printf("%s: called\n", __func__); \
|
|
} while(0)
|
|
#else
|
|
#define debug(level, fmt, args...)
|
|
#define debug_called(level)
|
|
#endif
|
|
|
|
/*
|
|
* Structure describing a logical unit as attached to the controller
|
|
*/
|
|
struct twe_drive
|
|
{
|
|
/* unit properties */
|
|
u_int32_t td_size;
|
|
int td_cylinders;
|
|
int td_heads;
|
|
int td_sectors;
|
|
int td_unit;
|
|
|
|
/* unit state and type */
|
|
u_int8_t td_state;
|
|
u_int8_t td_type;
|
|
|
|
/* handle for attached driver */
|
|
device_t td_disk;
|
|
};
|
|
|
|
/*
|
|
* Per-command control structure.
|
|
*
|
|
* Note that due to alignment constraints on the tc_command field, this *must* be 64-byte aligned.
|
|
* We achieve this by placing the command at the beginning of the structure, and using malloc()
|
|
* to allocate each structure.
|
|
*/
|
|
struct twe_request
|
|
{
|
|
int tr_tag;
|
|
/* command payload */
|
|
void *tr_data; /* data buffer */
|
|
void *tr_realdata; /* copy of real data buffer pointer for alignment fixup */
|
|
size_t tr_length;
|
|
|
|
TAILQ_ENTRY(twe_request) tr_link; /* list linkage */
|
|
struct twe_softc *tr_sc; /* controller that owns us */
|
|
int tr_status; /* command status */
|
|
#define TWE_CMD_SETUP 0 /* being assembled */
|
|
#define TWE_CMD_BUSY 1 /* submitted to controller */
|
|
#define TWE_CMD_COMPLETE 2 /* completed by controller (maybe with error) */
|
|
int tr_flags;
|
|
#define TWE_CMD_DATAIN (1<<0)
|
|
#define TWE_CMD_DATAOUT (1<<1)
|
|
#define TWE_CMD_ALIGNBUF (1<<2) /* data in bio is misaligned, have to copy to/from private buffer */
|
|
#define TWE_CMD_SLEEPER (1<<3) /* owner is sleeping on this command */
|
|
#define TWE_CMD_IMMEDIATE (1<<4) /* immediate request */
|
|
#define TWE_CMD_MAPPED (1<<5)
|
|
void (* tr_complete)(struct twe_request *tr); /* completion handler */
|
|
void *tr_private; /* submitter-private data or wait channel */
|
|
|
|
TWE_PLATFORM_REQUEST /* platform-specific request elements */
|
|
};
|
|
|
|
#define TWE_FIND_COMMAND(tr) \
|
|
(TWE_Command *)((u_int8_t *)(tr)->tr_sc->twe_cmd + \
|
|
((tr)->tr_tag * sizeof(TWE_Command)))
|
|
#define TWE_FIND_COMMANDPHYS(tr) ((tr)->tr_sc->twe_cmdphys + \
|
|
((tr)->tr_tag * sizeof(TWE_Command)))
|
|
|
|
/*
|
|
* Per-controller state.
|
|
*/
|
|
struct twe_softc
|
|
{
|
|
/* controller queues and arrays */
|
|
TAILQ_HEAD(, twe_request) twe_free; /* command structures available for reuse */
|
|
twe_bioq twe_bioq; /* outstanding I/O operations */
|
|
TAILQ_HEAD(, twe_request) twe_ready; /* requests ready for the controller */
|
|
TAILQ_HEAD(, twe_request) twe_busy; /* requests busy in the controller */
|
|
TAILQ_HEAD(, twe_request) twe_complete; /* active commands (busy or waiting for completion) */
|
|
struct twe_request *twe_lookup[TWE_Q_LENGTH]; /* commands indexed by request ID */
|
|
struct twe_drive twe_drive[TWE_MAX_UNITS]; /* attached drives */
|
|
|
|
/* asynchronous event handling */
|
|
u_int16_t twe_aen_queue[TWE_Q_LENGTH]; /* AENs queued for userland tool(s) */
|
|
int twe_aen_head, twe_aen_tail; /* ringbuffer pointers for AEN queue */
|
|
int twe_wait_aen; /* wait-for-aen notification */
|
|
|
|
/* controller status */
|
|
int twe_state;
|
|
#define TWE_STATE_INTEN (1<<0) /* interrupts have been enabled */
|
|
#define TWE_STATE_SHUTDOWN (1<<1) /* controller is shut down */
|
|
#define TWE_STATE_OPEN (1<<2) /* control device is open */
|
|
#define TWE_STATE_SUSPEND (1<<3) /* controller is suspended */
|
|
#define TWE_STATE_FRZN (1<<4)
|
|
int twe_host_id;
|
|
struct twe_qstat twe_qstat[TWEQ_COUNT]; /* queue statistics */
|
|
|
|
TWE_PLATFORM_SOFTC /* platform-specific softc elements */
|
|
};
|
|
|
|
/*
|
|
* Interface betwen driver core and platform-dependant code.
|
|
*/
|
|
extern int twe_setup(struct twe_softc *sc); /* do early driver/controller setup */
|
|
extern void twe_init(struct twe_softc *sc); /* init controller */
|
|
extern void twe_deinit(struct twe_softc *sc); /* stop controller */
|
|
extern void twe_intr(struct twe_softc *sc); /* hardware interrupt signalled */
|
|
extern void twe_startio(struct twe_softc *sc);
|
|
extern int twe_start(struct twe_request *tr);
|
|
extern int twe_dump_blocks(struct twe_softc *sc, int unit, /* crashdump block write */
|
|
u_int32_t lba, void *data, int nblks);
|
|
extern int twe_ioctl(struct twe_softc *sc, int cmd,
|
|
void *addr); /* handle user request */
|
|
extern void twe_describe_controller(struct twe_softc *sc); /* print controller info */
|
|
extern void twe_print_controller(struct twe_softc *sc);
|
|
extern void twe_enable_interrupts(struct twe_softc *sc); /* enable controller interrupts */
|
|
extern void twe_disable_interrupts(struct twe_softc *sc); /* disable controller interrupts */
|
|
|
|
extern void twe_attach_drive(struct twe_softc *sc,
|
|
struct twe_drive *dr); /* attach drive when found in twe_init */
|
|
extern void twe_detach_drive(struct twe_softc *sc,
|
|
int unit); /* detach drive */
|
|
extern void twe_clear_pci_parity_error(struct twe_softc *sc);
|
|
extern void twe_clear_pci_abort(struct twe_softc *sc);
|
|
extern void twed_intr(twe_bio *bp); /* return bio from core */
|
|
extern struct twe_request *twe_allocate_request(struct twe_softc *sc, int tag); /* allocate request structure */
|
|
extern void twe_free_request(struct twe_request *tr); /* free request structure */
|
|
extern int twe_map_request(struct twe_request *tr); /* make request visible to controller, do s/g */
|
|
extern void twe_unmap_request(struct twe_request *tr); /* cleanup after transfer, unmap */
|
|
|
|
/********************************************************************************
|
|
* Queue primitives
|
|
*/
|
|
#define TWEQ_ADD(sc, qname) \
|
|
do { \
|
|
struct twe_qstat *qs = &(sc)->twe_qstat[qname]; \
|
|
\
|
|
qs->q_length++; \
|
|
if (qs->q_length > qs->q_max) \
|
|
qs->q_max = qs->q_length; \
|
|
} while(0)
|
|
|
|
#define TWEQ_REMOVE(sc, qname) (sc)->twe_qstat[qname].q_length--
|
|
#define TWEQ_INIT(sc, qname) \
|
|
do { \
|
|
sc->twe_qstat[qname].q_length = 0; \
|
|
sc->twe_qstat[qname].q_max = 0; \
|
|
} while(0)
|
|
|
|
|
|
#define TWEQ_REQUEST_QUEUE(name, index) \
|
|
static __inline void \
|
|
twe_initq_ ## name (struct twe_softc *sc) \
|
|
{ \
|
|
TAILQ_INIT(&sc->twe_ ## name); \
|
|
TWEQ_INIT(sc, index); \
|
|
} \
|
|
static __inline void \
|
|
twe_enqueue_ ## name (struct twe_request *tr) \
|
|
{ \
|
|
int s; \
|
|
\
|
|
s = splbio(); \
|
|
TAILQ_INSERT_TAIL(&tr->tr_sc->twe_ ## name, tr, tr_link); \
|
|
TWEQ_ADD(tr->tr_sc, index); \
|
|
splx(s); \
|
|
} \
|
|
static __inline void \
|
|
twe_requeue_ ## name (struct twe_request *tr) \
|
|
{ \
|
|
int s; \
|
|
\
|
|
s = splbio(); \
|
|
TAILQ_INSERT_HEAD(&tr->tr_sc->twe_ ## name, tr, tr_link); \
|
|
TWEQ_ADD(tr->tr_sc, index); \
|
|
splx(s); \
|
|
} \
|
|
static __inline struct twe_request * \
|
|
twe_dequeue_ ## name (struct twe_softc *sc) \
|
|
{ \
|
|
struct twe_request *tr; \
|
|
int s; \
|
|
\
|
|
s = splbio(); \
|
|
if ((tr = TAILQ_FIRST(&sc->twe_ ## name)) != NULL) { \
|
|
TAILQ_REMOVE(&sc->twe_ ## name, tr, tr_link); \
|
|
TWEQ_REMOVE(sc, index); \
|
|
} \
|
|
splx(s); \
|
|
return(tr); \
|
|
} \
|
|
static __inline void \
|
|
twe_remove_ ## name (struct twe_request *tr) \
|
|
{ \
|
|
int s; \
|
|
\
|
|
s = splbio(); \
|
|
TAILQ_REMOVE(&tr->tr_sc->twe_ ## name, tr, tr_link); \
|
|
TWEQ_REMOVE(tr->tr_sc, index); \
|
|
splx(s); \
|
|
}
|
|
|
|
TWEQ_REQUEST_QUEUE(free, TWEQ_FREE)
|
|
TWEQ_REQUEST_QUEUE(ready, TWEQ_READY)
|
|
TWEQ_REQUEST_QUEUE(busy, TWEQ_BUSY)
|
|
TWEQ_REQUEST_QUEUE(complete, TWEQ_COMPLETE)
|
|
|
|
/*
|
|
* outstanding bio queue
|
|
*/
|
|
static __inline void
|
|
twe_initq_bio(struct twe_softc *sc)
|
|
{
|
|
TWE_BIO_QINIT(sc->twe_bioq);
|
|
TWEQ_INIT(sc, TWEQ_BIO);
|
|
}
|
|
|
|
static __inline void
|
|
twe_enqueue_bio(struct twe_softc *sc, twe_bio *bp)
|
|
{
|
|
int s;
|
|
|
|
s = splbio();
|
|
TWE_BIO_QINSERT(sc->twe_bioq, bp);
|
|
TWEQ_ADD(sc, TWEQ_BIO);
|
|
splx(s);
|
|
}
|
|
|
|
static __inline twe_bio *
|
|
twe_dequeue_bio(struct twe_softc *sc)
|
|
{
|
|
int s;
|
|
twe_bio *bp;
|
|
|
|
s = splbio();
|
|
if ((bp = TWE_BIO_QFIRST(sc->twe_bioq)) != NULL) {
|
|
TWE_BIO_QREMOVE(sc->twe_bioq, bp);
|
|
TWEQ_REMOVE(sc, TWEQ_BIO);
|
|
}
|
|
splx(s);
|
|
return(bp);
|
|
}
|