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c3b1df1293
freebsd/sys/dev/aac/aacvar.h
Justin T. Gibbs da4c1ce305 This is an MFC candidate. 
Add the AAC_DEBUG option to enable debugging in the aac driver.

Correct a race condition in the interrupt handler where the
controller may queue a fib to a response queue after the driver
has serviced the queue but before the interrupt is cleared.
This could leave a completed fib stranded in the response queue
unless another I/O completed and generated another interrupt.

Reviewed by:	msmith
2001-03-17 00:12:15 +00:00

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/*-
* 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.
*
* $FreeBSD$
*/
/********************************************************************************
********************************************************************************
Driver Parameter Definitions
********************************************************************************
********************************************************************************/
/*
* The firmware interface allows for a 16-bit s/g list length. We limit
* ourselves to a reasonable maximum and ensure alignment.
*/
#define AAC_MAXSGENTRIES 64 /* max S/G entries, limit 65535 */
/*
* We allocate a small set of FIBs for the adapter to use to send us messages.
*/
#define AAC_ADAPTER_FIBS 8
/*
* FIBs are allocated up-front, and the pool isn't grown. We should allocate
* enough here to let us keep the adapter busy without wasting large amounts
* of kernel memory. The current interface implementation limits us to 512
* FIBs queued for the adapter at any one time.
*/
#define AAC_FIB_COUNT 128
/*
* The controller reports status events in AIFs. We hang on to a number of these
* in order to pass them out to user-space management tools.
*/
#define AAC_AIFQ_LENGTH 64
/*
* Firmware messages are passed in the printf buffer.
*/
#define AAC_PRINTF_BUFSIZE 256
/*
* We wait this many seconds for the adapter to come ready if it is still booting
*/
#define AAC_BOOT_TIMEOUT (3 * 60)
/*
* Timeout for immediate commands.
*/
#define AAC_IMMEDIATE_TIMEOUT 30 /* seconds */
/*
* Timeout for normal commands
*/
#define AAC_CMD_TIMEOUT 30 /* seconds */
/*
* Rate at which we periodically check for timed out commands and kick the
* controller.
*/
#define AAC_PERIODIC_INTERVAL 10 /* seconds */
/*
* Character device major numbers.
*/
#define AAC_DISK_MAJOR 200
/********************************************************************************
********************************************************************************
Driver Variable Definitions
********************************************************************************
********************************************************************************/
#include "opt_aac.h"
#if __FreeBSD_version >= 500005
# include <sys/taskqueue.h>
#endif
/*
* Per-container data structure
*/
struct aac_container
{
struct aac_mntobj co_mntobj;
device_t co_disk;
};
/*
* Per-disk structure
*/
struct aac_disk
{
device_t ad_dev;
dev_t ad_dev_t;
struct aac_softc *ad_controller;
struct aac_container *ad_container;
struct disk ad_disk;
struct devstat ad_stats;
struct disklabel ad_label;
int ad_flags;
#define AAC_DISK_OPEN (1<<0)
int ad_cylinders;
int ad_heads;
int ad_sectors;
u_int32_t ad_size;
};
/*
* Per-command control structure.
*/
struct aac_command
{
TAILQ_ENTRY(aac_command) cm_link; /* list linkage */
struct aac_softc *cm_sc; /* controller that owns us */
struct aac_fib *cm_fib; /* FIB associated with this command */
u_int32_t cm_fibphys; /* bus address of the FIB */
struct bio *cm_data; /* pointer to data in kernel space */
u_int32_t cm_datalen; /* data length */
bus_dmamap_t cm_datamap; /* DMA map for bio data */
struct aac_sg_table *cm_sgtable; /* pointer to s/g table in command */
int cm_flags;
#define AAC_CMD_MAPPED (1<<0) /* command has had its data mapped */
#define AAC_CMD_DATAIN (1<<1) /* command involves data moving from controller to host */
#define AAC_CMD_DATAOUT (1<<2) /* command involves data moving from host to controller */
#define AAC_CMD_COMPLETED (1<<3) /* command has been completed */
#define AAC_CMD_TIMEDOUT (1<<4) /* command taken too long */
void (* cm_complete)(struct aac_command *cm);
void *cm_private;
time_t cm_timestamp; /* command creation time */
};
/*
* We gather a number of adapter-visible items into a single structure.
*
* The ordering of this strucure may be important; we copy the Linux driver:
*
* Adapter FIBs
* Init struct
* Queue headers (Comm Area)
* Printf buffer
*
* In addition, we add:
* Sync Fib
*/
struct aac_common {
/* fibs for the controller to send us messages */
struct aac_fib ac_fibs[AAC_ADAPTER_FIBS];
/* the init structure */
struct aac_adapter_init ac_init;
/* arena within which the queue structures are kept */
u_int8_t ac_qbuf[sizeof(struct aac_queue_table) + AAC_QUEUE_ALIGN];
/* buffer for text messages from the controller */
char ac_printf[AAC_PRINTF_BUFSIZE];
/* fib for synchronous commands */
struct aac_fib ac_sync_fib;
};
/*
* Interface operations
*/
struct aac_interface
{
int (* aif_get_fwstatus)(struct aac_softc *sc);
void (* aif_qnotify)(struct aac_softc *sc, int qbit);
int (* aif_get_istatus)(struct aac_softc *sc);
void (* aif_set_istatus)(struct aac_softc *sc, int mask);
void (* aif_set_mailbox)(struct aac_softc *sc, u_int32_t command,
u_int32_t arg0, u_int32_t arg1, u_int32_t arg2, u_int32_t arg3);
int (* aif_get_mailboxstatus)(struct aac_softc *sc);
void (* aif_set_interrupts)(struct aac_softc *sc, int enable);
};
extern struct aac_interface aac_rx_interface;
extern struct aac_interface aac_sa_interface;
#define AAC_GET_FWSTATUS(sc) ((sc)->aac_if.aif_get_fwstatus((sc)))
#define AAC_QNOTIFY(sc, qbit) ((sc)->aac_if.aif_qnotify((sc), (qbit)))
#define AAC_GET_ISTATUS(sc) ((sc)->aac_if.aif_get_istatus((sc)))
#define AAC_CLEAR_ISTATUS(sc, mask) ((sc)->aac_if.aif_set_istatus((sc), (mask)))
#define AAC_SET_MAILBOX(sc, command, arg0, arg1, arg2, arg3) \
((sc)->aac_if.aif_set_mailbox((sc), (command), (arg0), (arg1), (arg2), (arg3)))
#define AAC_GET_MAILBOXSTATUS(sc) ((sc)->aac_if.aif_get_mailboxstatus((sc)))
#define AAC_MASK_INTERRUPTS(sc) ((sc)->aac_if.aif_set_interrupts((sc), 0))
#define AAC_UNMASK_INTERRUPTS(sc) ((sc)->aac_if.aif_set_interrupts((sc), 1))
#define AAC_SETREG4(sc, reg, val) bus_space_write_4(sc->aac_btag, sc->aac_bhandle, reg, val)
#define AAC_GETREG4(sc, reg) bus_space_read_4 (sc->aac_btag, sc->aac_bhandle, reg)
#define AAC_SETREG2(sc, reg, val) bus_space_write_2(sc->aac_btag, sc->aac_bhandle, reg, val)
#define AAC_GETREG2(sc, reg) bus_space_read_2 (sc->aac_btag, sc->aac_bhandle, reg)
#define AAC_SETREG1(sc, reg, val) bus_space_write_1(sc->aac_btag, sc->aac_bhandle, reg, val)
#define AAC_GETREG1(sc, reg) bus_space_read_1 (sc->aac_btag, sc->aac_bhandle, reg)
/*
* Per-controller structure.
*/
struct aac_softc
{
/* bus connections */
device_t aac_dev;
struct resource *aac_regs_resource; /* register interface window */
int aac_regs_rid; /* resource ID */
bus_space_handle_t aac_bhandle; /* bus space handle */
bus_space_tag_t aac_btag; /* bus space tag */
bus_dma_tag_t aac_parent_dmat; /* parent DMA tag */
bus_dma_tag_t aac_buffer_dmat; /* data buffer/command DMA tag */
struct resource *aac_irq; /* interrupt */
int aac_irq_rid;
void *aac_intr; /* interrupt handle */
/* controller features, limits and status */
int aac_state;
#define AAC_STATE_SUSPEND (1<<0)
#define AAC_STATE_OPEN (1<<1)
#define AAC_STATE_INTERRUPTS_ON (1<<2)
#define AAC_STATE_AIF_SLEEPER (1<<3)
struct FsaRevision aac_revision;
/* controller hardware interface */
int aac_hwif;
#define AAC_HWIF_I960RX 0
#define AAC_HWIF_STRONGARM 1
#define AAC_HWIF_UNKNOWN -1
bus_dma_tag_t aac_common_dmat; /* common structure DMA tag */
bus_dmamap_t aac_common_dmamap; /* common structure DMA map */
struct aac_common *aac_common;
u_int32_t aac_common_busaddr;
struct aac_interface aac_if;
/* command/fib resources */
bus_dma_tag_t aac_fib_dmat; /* DMA tag for allocating FIBs */
struct aac_fib *aac_fibs;
bus_dmamap_t aac_fibmap;
u_int32_t aac_fibphys;
struct aac_command aac_command[AAC_FIB_COUNT];
/* command management */
TAILQ_HEAD(,aac_command) aac_free; /* command structures available for reuse */
TAILQ_HEAD(,aac_command) aac_ready; /* commands on hold for controller resources */
TAILQ_HEAD(,aac_command) aac_busy;
TAILQ_HEAD(,aac_command) aac_complete; /* commands which have been returned by the controller */
struct bio_queue_head aac_bioq;
struct aac_queue_table *aac_queues;
struct aac_queue_entry *aac_qentries[AAC_QUEUE_COUNT];
struct aac_qstat aac_qstat[AACQ_COUNT]; /* queue statistics */
/* connected containters */
struct aac_container aac_container[AAC_MAX_CONTAINERS];
/* delayed activity infrastructure */
#if __FreeBSD_version >= 500005
struct task aac_task_complete; /* deferred-completion task */
#endif
struct intr_config_hook aac_ich;
/* management interface */
dev_t aac_dev_t;
struct aac_aif_command aac_aifq[AAC_AIFQ_LENGTH];
int aac_aifq_head;
int aac_aifq_tail;
};
/*
* Public functions
*/
extern void aac_free(struct aac_softc *sc);
extern int aac_attach(struct aac_softc *sc);
extern int aac_detach(device_t dev);
extern int aac_shutdown(device_t dev);
extern int aac_suspend(device_t dev);
extern int aac_resume(device_t dev);
extern void aac_intr(void *arg);
extern devclass_t aac_devclass;
extern void aac_submit_bio(struct bio *bp);
extern void aac_biodone(struct bio *bp);
/*
* 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 AAC_DEBUG
# define debug(level, fmt, args...) \
do { \
if (level <= AAC_DEBUG) printf("%s: " fmt "\n", __FUNCTION__ , ##args); \
} while(0)
# define debug_called(level) \
do { \
if (level <= AAC_DEBUG) printf(__FUNCTION__ ": called\n"); \
} while(0)
extern void aac_print_queues(struct aac_softc *sc);
extern void aac_panic(struct aac_softc *sc, char *reason);
extern void aac_print_fib(struct aac_softc *sc, struct aac_fib *fib, char *caller);
extern void aac_print_aif(struct aac_softc *sc, struct aac_aif_command *aif);
# define AAC_PRINT_FIB(sc, fib) aac_print_fib(sc, fib, __FUNCTION__)
#else
# define debug(level, fmt, args...)
# define debug_called(level)
# define aac_print_queues(sc)
# define aac_panic(sc, reason)
# define aac_print_aif(sc, aif)
# define AAC_PRINT_FIB(sc, fib)
#endif
struct aac_code_lookup {
char *string;
u_int32_t code;
};
/********************************************************************************
* Queue primitives for driver queues.
*/
#define AACQ_ADD(sc, qname) \
do { \
struct aac_qstat *qs = &(sc)->aac_qstat[qname]; \
\
qs->q_length++; \
if (qs->q_length > qs->q_max) \
qs->q_max = qs->q_length; \
} while(0)
#define AACQ_REMOVE(sc, qname) (sc)->aac_qstat[qname].q_length--
#define AACQ_INIT(sc, qname) \
do { \
sc->aac_qstat[qname].q_length = 0; \
sc->aac_qstat[qname].q_max = 0; \
} while(0)
#define AACQ_COMMAND_QUEUE(name, index) \
static __inline void \
aac_initq_ ## name (struct aac_softc *sc) \
{ \
TAILQ_INIT(&sc->aac_ ## name); \
AACQ_INIT(sc, index); \
} \
static __inline void \
aac_enqueue_ ## name (struct aac_command *cm) \
{ \
int s; \
\
s = splbio(); \
TAILQ_INSERT_TAIL(&cm->cm_sc->aac_ ## name, cm, cm_link); \
AACQ_ADD(cm->cm_sc, index); \
splx(s); \
} \
static __inline void \
aac_requeue_ ## name (struct aac_command *cm) \
{ \
int s; \
\
s = splbio(); \
TAILQ_INSERT_HEAD(&cm->cm_sc->aac_ ## name, cm, cm_link); \
AACQ_ADD(cm->cm_sc, index); \
splx(s); \
} \
static __inline struct aac_command * \
aac_dequeue_ ## name (struct aac_softc *sc) \
{ \
struct aac_command *cm; \
int s; \
\
s = splbio(); \
if ((cm = TAILQ_FIRST(&sc->aac_ ## name)) != NULL) { \
TAILQ_REMOVE(&sc->aac_ ## name, cm, cm_link); \
AACQ_REMOVE(sc, index); \
} \
splx(s); \
return(cm); \
} \
static __inline void \
aac_remove_ ## name (struct aac_command *cm) \
{ \
int s; \
\
s = splbio(); \
TAILQ_REMOVE(&cm->cm_sc->aac_ ## name, cm, cm_link); \
AACQ_REMOVE(cm->cm_sc, index); \
splx(s); \
} \
struct hack
AACQ_COMMAND_QUEUE(free, AACQ_FREE);
AACQ_COMMAND_QUEUE(ready, AACQ_READY);
AACQ_COMMAND_QUEUE(busy, AACQ_BUSY);
AACQ_COMMAND_QUEUE(complete, AACQ_COMPLETE);
/*
* outstanding bio queue
*/
static __inline void
aac_initq_bio(struct aac_softc *sc)
{
bioq_init(&sc->aac_bioq);
AACQ_INIT(sc, AACQ_BIO);
}
static __inline void
aac_enqueue_bio(struct aac_softc *sc, struct bio *bp)
{
int s;
s = splbio();
bioq_insert_tail(&sc->aac_bioq, bp);
AACQ_ADD(sc, AACQ_BIO);
splx(s);
}
static __inline struct bio *
aac_dequeue_bio(struct aac_softc *sc)
{
int s;
struct bio *bp;
s = splbio();
if ((bp = bioq_first(&sc->aac_bioq)) != NULL) {
bioq_remove(&sc->aac_bioq, bp);
AACQ_REMOVE(sc, AACQ_BIO);
}
splx(s);
return(bp);
}
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