29db911e9b
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
462 lines
14 KiB
C
462 lines
14 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/********************************************************************************
|
|
********************************************************************************
|
|
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);
|
|
}
|