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Diffstat (limited to 'drivers/scsi/aic7xxx/aic7xxx_osm.c')
-rw-r--r--drivers/scsi/aic7xxx/aic7xxx_osm.c1403
1 files changed, 339 insertions, 1064 deletions
diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c
index d978e4a3e973..c13e56320010 100644
--- a/drivers/scsi/aic7xxx/aic7xxx_osm.c
+++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c
@@ -134,11 +134,6 @@ static struct scsi_transport_template *ahc_linux_transport_template = NULL;
#include "aiclib.c"
#include <linux/init.h> /* __setup */
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
-#include "sd.h" /* For geometry detection */
-#endif
-
#include <linux/mm.h> /* For fetching system memory size */
#include <linux/blkdev.h> /* For block_size() */
#include <linux/delay.h> /* For ssleep/msleep */
@@ -148,11 +143,6 @@ static struct scsi_transport_template *ahc_linux_transport_template = NULL;
*/
spinlock_t ahc_list_spinlock;
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
-/* For dynamic sglist size calculation. */
-u_int ahc_linux_nseg;
-#endif
-
/*
* Set this to the delay in seconds after SCSI bus reset.
* Note, we honor this only for the initial bus reset.
@@ -436,15 +426,12 @@ static void ahc_linux_handle_scsi_status(struct ahc_softc *,
struct ahc_linux_device *,
struct scb *);
static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
- Scsi_Cmnd *cmd);
+ struct scsi_cmnd *cmd);
static void ahc_linux_sem_timeout(u_long arg);
static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
static void ahc_linux_release_simq(u_long arg);
-static void ahc_linux_dev_timed_unfreeze(u_long arg);
-static int ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag);
+static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
-static void ahc_linux_size_nseg(void);
-static void ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc);
static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
struct ahc_devinfo *devinfo);
static void ahc_linux_device_queue_depth(struct ahc_softc *ahc,
@@ -458,54 +445,27 @@ static struct ahc_linux_device* ahc_linux_alloc_device(struct ahc_softc*,
u_int);
static void ahc_linux_free_device(struct ahc_softc*,
struct ahc_linux_device*);
-static void ahc_linux_run_device_queue(struct ahc_softc*,
- struct ahc_linux_device*);
+static int ahc_linux_run_command(struct ahc_softc*,
+ struct ahc_linux_device *,
+ struct scsi_cmnd *);
static void ahc_linux_setup_tag_info_global(char *p);
static aic_option_callback_t ahc_linux_setup_tag_info;
static int aic7xxx_setup(char *s);
static int ahc_linux_next_unit(void);
-static void ahc_runq_tasklet(unsigned long data);
-static struct ahc_cmd *ahc_linux_run_complete_queue(struct ahc_softc *ahc);
/********************************* Inlines ************************************/
-static __inline void ahc_schedule_runq(struct ahc_softc *ahc);
static __inline struct ahc_linux_device*
ahc_linux_get_device(struct ahc_softc *ahc, u_int channel,
- u_int target, u_int lun, int alloc);
-static __inline void ahc_schedule_completeq(struct ahc_softc *ahc);
-static __inline void ahc_linux_check_device_queue(struct ahc_softc *ahc,
- struct ahc_linux_device *dev);
-static __inline struct ahc_linux_device *
- ahc_linux_next_device_to_run(struct ahc_softc *ahc);
-static __inline void ahc_linux_run_device_queues(struct ahc_softc *ahc);
+ u_int target, u_int lun);
static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
struct ahc_dma_seg *sg,
dma_addr_t addr, bus_size_t len);
-static __inline void
-ahc_schedule_completeq(struct ahc_softc *ahc)
-{
- if ((ahc->platform_data->flags & AHC_RUN_CMPLT_Q_TIMER) == 0) {
- ahc->platform_data->flags |= AHC_RUN_CMPLT_Q_TIMER;
- ahc->platform_data->completeq_timer.expires = jiffies;
- add_timer(&ahc->platform_data->completeq_timer);
- }
-}
-
-/*
- * Must be called with our lock held.
- */
-static __inline void
-ahc_schedule_runq(struct ahc_softc *ahc)
-{
- tasklet_schedule(&ahc->platform_data->runq_tasklet);
-}
-
static __inline struct ahc_linux_device*
ahc_linux_get_device(struct ahc_softc *ahc, u_int channel, u_int target,
- u_int lun, int alloc)
+ u_int lun)
{
struct ahc_linux_target *targ;
struct ahc_linux_device *dev;
@@ -515,102 +475,15 @@ ahc_linux_get_device(struct ahc_softc *ahc, u_int channel, u_int target,
if (channel != 0)
target_offset += 8;
targ = ahc->platform_data->targets[target_offset];
- if (targ == NULL) {
- if (alloc != 0) {
- targ = ahc_linux_alloc_target(ahc, channel, target);
- if (targ == NULL)
- return (NULL);
- } else
- return (NULL);
- }
+ BUG_ON(targ == NULL);
dev = targ->devices[lun];
- if (dev == NULL && alloc != 0)
- dev = ahc_linux_alloc_device(ahc, targ, lun);
- return (dev);
-}
-
-#define AHC_LINUX_MAX_RETURNED_ERRORS 4
-static struct ahc_cmd *
-ahc_linux_run_complete_queue(struct ahc_softc *ahc)
-{
- struct ahc_cmd *acmd;
- u_long done_flags;
- int with_errors;
-
- with_errors = 0;
- ahc_done_lock(ahc, &done_flags);
- while ((acmd = TAILQ_FIRST(&ahc->platform_data->completeq)) != NULL) {
- Scsi_Cmnd *cmd;
-
- if (with_errors > AHC_LINUX_MAX_RETURNED_ERRORS) {
- /*
- * Linux uses stack recursion to requeue
- * commands that need to be retried. Avoid
- * blowing out the stack by "spoon feeding"
- * commands that completed with error back
- * the operating system in case they are going
- * to be retried. "ick"
- */
- ahc_schedule_completeq(ahc);
- break;
- }
- TAILQ_REMOVE(&ahc->platform_data->completeq,
- acmd, acmd_links.tqe);
- cmd = &acmd_scsi_cmd(acmd);
- cmd->host_scribble = NULL;
- if (ahc_cmd_get_transaction_status(cmd) != DID_OK
- || (cmd->result & 0xFF) != SCSI_STATUS_OK)
- with_errors++;
-
- cmd->scsi_done(cmd);
- }
- ahc_done_unlock(ahc, &done_flags);
- return (acmd);
-}
-
-static __inline void
-ahc_linux_check_device_queue(struct ahc_softc *ahc,
- struct ahc_linux_device *dev)
-{
- if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) != 0
- && dev->active == 0) {
- dev->flags &= ~AHC_DEV_FREEZE_TIL_EMPTY;
- dev->qfrozen--;
- }
-
- if (TAILQ_FIRST(&dev->busyq) == NULL
- || dev->openings == 0 || dev->qfrozen != 0)
- return;
-
- ahc_linux_run_device_queue(ahc, dev);
-}
-
-static __inline struct ahc_linux_device *
-ahc_linux_next_device_to_run(struct ahc_softc *ahc)
-{
-
- if ((ahc->flags & AHC_RESOURCE_SHORTAGE) != 0
- || (ahc->platform_data->qfrozen != 0))
- return (NULL);
- return (TAILQ_FIRST(&ahc->platform_data->device_runq));
-}
-
-static __inline void
-ahc_linux_run_device_queues(struct ahc_softc *ahc)
-{
- struct ahc_linux_device *dev;
-
- while ((dev = ahc_linux_next_device_to_run(ahc)) != NULL) {
- TAILQ_REMOVE(&ahc->platform_data->device_runq, dev, links);
- dev->flags &= ~AHC_DEV_ON_RUN_LIST;
- ahc_linux_check_device_queue(ahc, dev);
- }
+ return dev;
}
static __inline void
ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
{
- Scsi_Cmnd *cmd;
+ struct scsi_cmnd *cmd;
cmd = scb->io_ctx;
ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
@@ -650,109 +523,15 @@ ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
return (consumed);
}
-/************************ Host template entry points *************************/
-static int ahc_linux_detect(Scsi_Host_Template *);
-static int ahc_linux_queue(Scsi_Cmnd *, void (*)(Scsi_Cmnd *));
-static const char *ahc_linux_info(struct Scsi_Host *);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
-static int ahc_linux_slave_alloc(Scsi_Device *);
-static int ahc_linux_slave_configure(Scsi_Device *);
-static void ahc_linux_slave_destroy(Scsi_Device *);
-#if defined(__i386__)
-static int ahc_linux_biosparam(struct scsi_device*,
- struct block_device*,
- sector_t, int[]);
-#endif
-#else
-static int ahc_linux_release(struct Scsi_Host *);
-static void ahc_linux_select_queue_depth(struct Scsi_Host *host,
- Scsi_Device *scsi_devs);
-#if defined(__i386__)
-static int ahc_linux_biosparam(Disk *, kdev_t, int[]);
-#endif
-#endif
-static int ahc_linux_bus_reset(Scsi_Cmnd *);
-static int ahc_linux_dev_reset(Scsi_Cmnd *);
-static int ahc_linux_abort(Scsi_Cmnd *);
-
-/*
- * Calculate a safe value for AHC_NSEG (as expressed through ahc_linux_nseg).
- *
- * In pre-2.5.X...
- * The midlayer allocates an S/G array dynamically when a command is issued
- * using SCSI malloc. This array, which is in an OS dependent format that
- * must later be copied to our private S/G list, is sized to house just the
- * number of segments needed for the current transfer. Since the code that
- * sizes the SCSI malloc pool does not take into consideration fragmentation
- * of the pool, executing transactions numbering just a fraction of our
- * concurrent transaction limit with list lengths aproaching AHC_NSEG will
- * quickly depleat the SCSI malloc pool of usable space. Unfortunately, the
- * mid-layer does not properly handle this scsi malloc failures for the S/G
- * array and the result can be a lockup of the I/O subsystem. We try to size
- * our S/G list so that it satisfies our drivers allocation requirements in
- * addition to avoiding fragmentation of the SCSI malloc pool.
- */
-static void
-ahc_linux_size_nseg(void)
-{
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
- u_int cur_size;
- u_int best_size;
-
- /*
- * The SCSI allocator rounds to the nearest 512 bytes
- * an cannot allocate across a page boundary. Our algorithm
- * is to start at 1K of scsi malloc space per-command and
- * loop through all factors of the PAGE_SIZE and pick the best.
- */
- best_size = 0;
- for (cur_size = 1024; cur_size <= PAGE_SIZE; cur_size *= 2) {
- u_int nseg;
-
- nseg = cur_size / sizeof(struct scatterlist);
- if (nseg < AHC_LINUX_MIN_NSEG)
- continue;
-
- if (best_size == 0) {
- best_size = cur_size;
- ahc_linux_nseg = nseg;
- } else {
- u_int best_rem;
- u_int cur_rem;
-
- /*
- * Compare the traits of the current "best_size"
- * with the current size to determine if the
- * current size is a better size.
- */
- best_rem = best_size % sizeof(struct scatterlist);
- cur_rem = cur_size % sizeof(struct scatterlist);
- if (cur_rem < best_rem) {
- best_size = cur_size;
- ahc_linux_nseg = nseg;
- }
- }
- }
-#endif
-}
-
/*
* Try to detect an Adaptec 7XXX controller.
*/
static int
-ahc_linux_detect(Scsi_Host_Template *template)
+ahc_linux_detect(struct scsi_host_template *template)
{
struct ahc_softc *ahc;
int found = 0;
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
- /*
- * It is a bug that the upper layer takes
- * this lock just prior to calling us.
- */
- spin_unlock_irq(&io_request_lock);
-#endif
-
/*
* Sanity checking of Linux SCSI data structures so
* that some of our hacks^H^H^H^H^Hassumptions aren't
@@ -764,7 +543,6 @@ ahc_linux_detect(Scsi_Host_Template *template)
printf("ahc_linux_detect: Unable to attach\n");
return (0);
}
- ahc_linux_size_nseg();
/*
* If we've been passed any parameters, process them now.
*/
@@ -793,48 +571,11 @@ ahc_linux_detect(Scsi_Host_Template *template)
found++;
}
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
- spin_lock_irq(&io_request_lock);
-#endif
aic7xxx_detect_complete++;
return (found);
}
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
-/*
- * Free the passed in Scsi_Host memory structures prior to unloading the
- * module.
- */
-int
-ahc_linux_release(struct Scsi_Host * host)
-{
- struct ahc_softc *ahc;
- u_long l;
-
- ahc_list_lock(&l);
- if (host != NULL) {
-
- /*
- * We should be able to just perform
- * the free directly, but check our
- * list for extra sanity.
- */
- ahc = ahc_find_softc(*(struct ahc_softc **)host->hostdata);
- if (ahc != NULL) {
- u_long s;
-
- ahc_lock(ahc, &s);
- ahc_intr_enable(ahc, FALSE);
- ahc_unlock(ahc, &s);
- ahc_free(ahc);
- }
- }
- ahc_list_unlock(&l);
- return (0);
-}
-#endif
-
/*
* Return a string describing the driver.
*/
@@ -867,11 +608,10 @@ ahc_linux_info(struct Scsi_Host *host)
* Queue an SCB to the controller.
*/
static int
-ahc_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *))
+ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
{
struct ahc_softc *ahc;
struct ahc_linux_device *dev;
- u_long flags;
ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
@@ -880,205 +620,152 @@ ahc_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *))
*/
cmd->scsi_done = scsi_done;
- ahc_midlayer_entrypoint_lock(ahc, &flags);
-
/*
* Close the race of a command that was in the process of
* being queued to us just as our simq was frozen. Let
* DV commands through so long as we are only frozen to
* perform DV.
*/
- if (ahc->platform_data->qfrozen != 0) {
+ if (ahc->platform_data->qfrozen != 0)
+ return SCSI_MLQUEUE_HOST_BUSY;
- ahc_cmd_set_transaction_status(cmd, CAM_REQUEUE_REQ);
- ahc_linux_queue_cmd_complete(ahc, cmd);
- ahc_schedule_completeq(ahc);
- ahc_midlayer_entrypoint_unlock(ahc, &flags);
- return (0);
- }
dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id,
- cmd->device->lun, /*alloc*/TRUE);
- if (dev == NULL) {
- ahc_cmd_set_transaction_status(cmd, CAM_RESRC_UNAVAIL);
- ahc_linux_queue_cmd_complete(ahc, cmd);
- ahc_schedule_completeq(ahc);
- ahc_midlayer_entrypoint_unlock(ahc, &flags);
- printf("%s: aic7xxx_linux_queue - Unable to allocate device!\n",
- ahc_name(ahc));
- return (0);
- }
+ cmd->device->lun);
+ BUG_ON(dev == NULL);
+
cmd->result = CAM_REQ_INPROG << 16;
- TAILQ_INSERT_TAIL(&dev->busyq, (struct ahc_cmd *)cmd, acmd_links.tqe);
- if ((dev->flags & AHC_DEV_ON_RUN_LIST) == 0) {
- TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, dev, links);
- dev->flags |= AHC_DEV_ON_RUN_LIST;
- ahc_linux_run_device_queues(ahc);
- }
- ahc_midlayer_entrypoint_unlock(ahc, &flags);
- return (0);
+
+ return ahc_linux_run_command(ahc, dev, cmd);
}
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
static int
-ahc_linux_slave_alloc(Scsi_Device *device)
+ahc_linux_slave_alloc(struct scsi_device *device)
{
struct ahc_softc *ahc;
+ struct ahc_linux_target *targ;
+ struct scsi_target *starget = device->sdev_target;
+ struct ahc_linux_device *dev;
+ unsigned int target_offset;
+ unsigned long flags;
+ int retval = -ENOMEM;
+
+ target_offset = starget->id;
+ if (starget->channel != 0)
+ target_offset += 8;
ahc = *((struct ahc_softc **)device->host->hostdata);
if (bootverbose)
printf("%s: Slave Alloc %d\n", ahc_name(ahc), device->id);
- return (0);
+ ahc_lock(ahc, &flags);
+ targ = ahc->platform_data->targets[target_offset];
+ if (targ == NULL) {
+ struct seeprom_config *sc;
+
+ targ = ahc_linux_alloc_target(ahc, starget->channel,
+ starget->id);
+ sc = ahc->seep_config;
+ if (targ == NULL)
+ goto out;
+
+ if (sc) {
+ unsigned short scsirate;
+ struct ahc_devinfo devinfo;
+ struct ahc_initiator_tinfo *tinfo;
+ struct ahc_tmode_tstate *tstate;
+ char channel = starget->channel + 'A';
+ unsigned int our_id = ahc->our_id;
+
+ if (starget->channel)
+ our_id = ahc->our_id_b;
+
+ if ((ahc->features & AHC_ULTRA2) != 0) {
+ scsirate = sc->device_flags[target_offset] & CFXFER;
+ } else {
+ scsirate = (sc->device_flags[target_offset] & CFXFER) << 4;
+ if (sc->device_flags[target_offset] & CFSYNCH)
+ scsirate |= SOFS;
+ }
+ if (sc->device_flags[target_offset] & CFWIDEB) {
+ scsirate |= WIDEXFER;
+ spi_max_width(starget) = 1;
+ } else
+ spi_max_width(starget) = 0;
+ spi_min_period(starget) =
+ ahc_find_period(ahc, scsirate, AHC_SYNCRATE_DT);
+ tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
+ targ->target, &tstate);
+ ahc_compile_devinfo(&devinfo, our_id, targ->target,
+ CAM_LUN_WILDCARD, channel,
+ ROLE_INITIATOR);
+ ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
+ AHC_TRANS_GOAL, /*paused*/FALSE);
+ ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
+ AHC_TRANS_GOAL, /*paused*/FALSE);
+ }
+
+ }
+ dev = targ->devices[device->lun];
+ if (dev == NULL) {
+ dev = ahc_linux_alloc_device(ahc, targ, device->lun);
+ if (dev == NULL)
+ goto out;
+ }
+ retval = 0;
+
+ out:
+ ahc_unlock(ahc, &flags);
+ return retval;
}
static int
-ahc_linux_slave_configure(Scsi_Device *device)
+ahc_linux_slave_configure(struct scsi_device *device)
{
struct ahc_softc *ahc;
struct ahc_linux_device *dev;
- u_long flags;
ahc = *((struct ahc_softc **)device->host->hostdata);
+
if (bootverbose)
printf("%s: Slave Configure %d\n", ahc_name(ahc), device->id);
- ahc_midlayer_entrypoint_lock(ahc, &flags);
- /*
- * Since Linux has attached to the device, configure
- * it so we don't free and allocate the device
- * structure on every command.
- */
- dev = ahc_linux_get_device(ahc, device->channel,
- device->id, device->lun,
- /*alloc*/TRUE);
- if (dev != NULL) {
- dev->flags &= ~AHC_DEV_UNCONFIGURED;
- dev->scsi_device = device;
- ahc_linux_device_queue_depth(ahc, dev);
- }
- ahc_midlayer_entrypoint_unlock(ahc, &flags);
+
+ dev = ahc_linux_get_device(ahc, device->channel, device->id,
+ device->lun);
+ dev->scsi_device = device;
+ ahc_linux_device_queue_depth(ahc, dev);
/* Initial Domain Validation */
if (!spi_initial_dv(device->sdev_target))
spi_dv_device(device);
- return (0);
+ return 0;
}
static void
-ahc_linux_slave_destroy(Scsi_Device *device)
+ahc_linux_slave_destroy(struct scsi_device *device)
{
struct ahc_softc *ahc;
struct ahc_linux_device *dev;
- u_long flags;
ahc = *((struct ahc_softc **)device->host->hostdata);
if (bootverbose)
printf("%s: Slave Destroy %d\n", ahc_name(ahc), device->id);
- ahc_midlayer_entrypoint_lock(ahc, &flags);
dev = ahc_linux_get_device(ahc, device->channel,
- device->id, device->lun,
- /*alloc*/FALSE);
- /*
- * Filter out "silly" deletions of real devices by only
- * deleting devices that have had slave_configure()
- * called on them. All other devices that have not
- * been configured will automatically be deleted by
- * the refcounting process.
- */
- if (dev != NULL
- && (dev->flags & AHC_DEV_SLAVE_CONFIGURED) != 0) {
- dev->flags |= AHC_DEV_UNCONFIGURED;
- if (TAILQ_EMPTY(&dev->busyq)
- && dev->active == 0
- && (dev->flags & AHC_DEV_TIMER_ACTIVE) == 0)
- ahc_linux_free_device(ahc, dev);
- }
- ahc_midlayer_entrypoint_unlock(ahc, &flags);
-}
-#else
-/*
- * Sets the queue depth for each SCSI device hanging
- * off the input host adapter.
- */
-static void
-ahc_linux_select_queue_depth(struct Scsi_Host *host, Scsi_Device *scsi_devs)
-{
- Scsi_Device *device;
- Scsi_Device *ldev;
- struct ahc_softc *ahc;
- u_long flags;
+ device->id, device->lun);
- ahc = *((struct ahc_softc **)host->hostdata);
- ahc_lock(ahc, &flags);
- for (device = scsi_devs; device != NULL; device = device->next) {
+ BUG_ON(dev->active);
- /*
- * Watch out for duplicate devices. This works around
- * some quirks in how the SCSI scanning code does its
- * device management.
- */
- for (ldev = scsi_devs; ldev != device; ldev = ldev->next) {
- if (ldev->host == device->host
- && ldev->channel == device->channel
- && ldev->id == device->id
- && ldev->lun == device->lun)
- break;
- }
- /* Skip duplicate. */
- if (ldev != device)
- continue;
-
- if (device->host == host) {
- struct ahc_linux_device *dev;
-
- /*
- * Since Linux has attached to the device, configure
- * it so we don't free and allocate the device
- * structure on every command.
- */
- dev = ahc_linux_get_device(ahc, device->channel,
- device->id, device->lun,
- /*alloc*/TRUE);
- if (dev != NULL) {
- dev->flags &= ~AHC_DEV_UNCONFIGURED;
- dev->scsi_device = device;
- ahc_linux_device_queue_depth(ahc, dev);
- device->queue_depth = dev->openings
- + dev->active;
- if ((dev->flags & (AHC_DEV_Q_BASIC
- | AHC_DEV_Q_TAGGED)) == 0) {
- /*
- * We allow the OS to queue 2 untagged
- * transactions to us at any time even
- * though we can only execute them
- * serially on the controller/device.
- * This should remove some latency.
- */
- device->queue_depth = 2;
- }
- }
- }
- }
- ahc_unlock(ahc, &flags);
+ ahc_linux_free_device(ahc, dev);
}
-#endif
#if defined(__i386__)
/*
* Return the disk geometry for the given SCSI device.
*/
static int
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
sector_t capacity, int geom[])
{
uint8_t *bh;
-#else
-ahc_linux_biosparam(Disk *disk, kdev_t dev, int geom[])
-{
- struct scsi_device *sdev = disk->device;
- u_long capacity = disk->capacity;
- struct buffer_head *bh;
-#endif
int heads;
int sectors;
int cylinders;
@@ -1090,22 +777,11 @@ ahc_linux_biosparam(Disk *disk, kdev_t dev, int geom[])
ahc = *((struct ahc_softc **)sdev->host->hostdata);
channel = sdev->channel;
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
bh = scsi_bios_ptable(bdev);
-#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,17)
- bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, block_size(dev));
-#else
- bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, 1024);
-#endif
-
if (bh) {
ret = scsi_partsize(bh, capacity,
&geom[2], &geom[0], &geom[1]);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
kfree(bh);
-#else
- brelse(bh);
-#endif
if (ret != -1)
return (ret);
}
@@ -1135,7 +811,7 @@ ahc_linux_biosparam(Disk *disk, kdev_t dev, int geom[])
* Abort the current SCSI command(s).
*/
static int
-ahc_linux_abort(Scsi_Cmnd *cmd)
+ahc_linux_abort(struct scsi_cmnd *cmd)
{
int error;
@@ -1149,7 +825,7 @@ ahc_linux_abort(Scsi_Cmnd *cmd)
* Attempt to send a target reset message to the device that timed out.
*/
static int
-ahc_linux_dev_reset(Scsi_Cmnd *cmd)
+ahc_linux_dev_reset(struct scsi_cmnd *cmd)
{
int error;
@@ -1163,18 +839,14 @@ ahc_linux_dev_reset(Scsi_Cmnd *cmd)
* Reset the SCSI bus.
*/
static int
-ahc_linux_bus_reset(Scsi_Cmnd *cmd)
+ahc_linux_bus_reset(struct scsi_cmnd *cmd)
{
struct ahc_softc *ahc;
- u_long s;
int found;
ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
- ahc_midlayer_entrypoint_lock(ahc, &s);
found = ahc_reset_channel(ahc, cmd->device->channel + 'A',
/*initiate reset*/TRUE);
- ahc_linux_run_complete_queue(ahc);
- ahc_midlayer_entrypoint_unlock(ahc, &s);
if (bootverbose)
printf("%s: SCSI bus reset delivered. "
@@ -1183,7 +855,7 @@ ahc_linux_bus_reset(Scsi_Cmnd *cmd)
return SUCCESS;
}
-Scsi_Host_Template aic7xxx_driver_template = {
+struct scsi_host_template aic7xxx_driver_template = {
.module = THIS_MODULE,
.name = "aic7xxx",
.proc_info = ahc_linux_proc_info,
@@ -1206,33 +878,6 @@ Scsi_Host_Template aic7xxx_driver_template = {
/**************************** Tasklet Handler *********************************/
-/*
- * In 2.4.X and above, this routine is called from a tasklet,
- * so we must re-acquire our lock prior to executing this code.
- * In all prior kernels, ahc_schedule_runq() calls this routine
- * directly and ahc_schedule_runq() is called with our lock held.
- */
-static void
-ahc_runq_tasklet(unsigned long data)
-{
- struct ahc_softc* ahc;
- struct ahc_linux_device *dev;
- u_long flags;
-
- ahc = (struct ahc_softc *)data;
- ahc_lock(ahc, &flags);
- while ((dev = ahc_linux_next_device_to_run(ahc)) != NULL) {
-
- TAILQ_REMOVE(&ahc->platform_data->device_runq, dev, links);
- dev->flags &= ~AHC_DEV_ON_RUN_LIST;
- ahc_linux_check_device_queue(ahc, dev);
- /* Yeild to our interrupt handler */
- ahc_unlock(ahc, &flags);
- ahc_lock(ahc, &flags);
- }
- ahc_unlock(ahc, &flags);
-}
-
/******************************** Macros **************************************/
#define BUILD_SCSIID(ahc, cmd) \
((((cmd)->device->id << TID_SHIFT) & TID) \
@@ -1278,37 +923,11 @@ int
ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
int flags, bus_dmamap_t *mapp)
{
- bus_dmamap_t map;
-
- map = malloc(sizeof(*map), M_DEVBUF, M_NOWAIT);
- if (map == NULL)
- return (ENOMEM);
- /*
- * Although we can dma data above 4GB, our
- * "consistent" memory is below 4GB for
- * space efficiency reasons (only need a 4byte
- * address). For this reason, we have to reset
- * our dma mask when doing allocations.
- */
- if (ahc->dev_softc != NULL)
- if (pci_set_dma_mask(ahc->dev_softc, 0xFFFFFFFF)) {
- printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
- kfree(map);
- return (ENODEV);
- }
*vaddr = pci_alloc_consistent(ahc->dev_softc,
- dmat->maxsize, &map->bus_addr);
- if (ahc->dev_softc != NULL)
- if (pci_set_dma_mask(ahc->dev_softc,
- ahc->platform_data->hw_dma_mask)) {
- printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
- kfree(map);
- return (ENODEV);
- }
+ dmat->maxsize, mapp);
if (*vaddr == NULL)
- return (ENOMEM);
- *mapp = map;
- return(0);
+ return ENOMEM;
+ return 0;
}
void
@@ -1316,7 +935,7 @@ ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
void* vaddr, bus_dmamap_t map)
{
pci_free_consistent(ahc->dev_softc, dmat->maxsize,
- vaddr, map->bus_addr);
+ vaddr, map);
}
int
@@ -1330,7 +949,7 @@ ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
*/
bus_dma_segment_t stack_sg;
- stack_sg.ds_addr = map->bus_addr;
+ stack_sg.ds_addr = map;
stack_sg.ds_len = dmat->maxsize;
cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
return (0);
@@ -1339,12 +958,6 @@ ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
void
ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
{
- /*
- * The map may is NULL in our < 2.3.X implementation.
- * Now it's 2.6.5, but just in case...
- */
- BUG_ON(map == NULL);
- free(map, M_DEVBUF);
}
int
@@ -1550,7 +1163,7 @@ __setup("aic7xxx=", aic7xxx_setup);
uint32_t aic7xxx_verbose;
int
-ahc_linux_register_host(struct ahc_softc *ahc, Scsi_Host_Template *template)
+ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
{
char buf[80];
struct Scsi_Host *host;
@@ -1564,11 +1177,7 @@ ahc_linux_register_host(struct ahc_softc *ahc, Scsi_Host_Template *template)
*((struct ahc_softc **)host->hostdata) = ahc;
ahc_lock(ahc, &s);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
scsi_assign_lock(host, &ahc->platform_data->spin_lock);
-#elif AHC_SCSI_HAS_HOST_LOCK != 0
- host->lock = &ahc->platform_data->spin_lock;
-#endif
ahc->platform_data->host = host;
host->can_queue = AHC_MAX_QUEUE;
host->cmd_per_lun = 2;
@@ -1587,19 +1196,14 @@ ahc_linux_register_host(struct ahc_softc *ahc, Scsi_Host_Template *template)
ahc_set_name(ahc, new_name);
}
host->unique_id = ahc->unit;
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
- scsi_set_pci_device(host, ahc->dev_softc);
-#endif
ahc_linux_initialize_scsi_bus(ahc);
ahc_intr_enable(ahc, TRUE);
ahc_unlock(ahc, &s);
host->transportt = ahc_linux_transport_template;
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */
scsi_scan_host(host);
-#endif
return (0);
}
@@ -1717,19 +1321,9 @@ ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
if (ahc->platform_data == NULL)
return (ENOMEM);
memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
- TAILQ_INIT(&ahc->platform_data->completeq);
- TAILQ_INIT(&ahc->platform_data->device_runq);
ahc->platform_data->irq = AHC_LINUX_NOIRQ;
- ahc->platform_data->hw_dma_mask = 0xFFFFFFFF;
ahc_lockinit(ahc);
- ahc_done_lockinit(ahc);
- init_timer(&ahc->platform_data->completeq_timer);
- ahc->platform_data->completeq_timer.data = (u_long)ahc;
- ahc->platform_data->completeq_timer.function =
- (ahc_linux_callback_t *)ahc_linux_thread_run_complete_queue;
init_MUTEX_LOCKED(&ahc->platform_data->eh_sem);
- tasklet_init(&ahc->platform_data->runq_tasklet, ahc_runq_tasklet,
- (unsigned long)ahc);
ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
if (aic7xxx_pci_parity == 0)
@@ -1746,12 +1340,8 @@ ahc_platform_free(struct ahc_softc *ahc)
int i, j;
if (ahc->platform_data != NULL) {
- del_timer_sync(&ahc->platform_data->completeq_timer);
- tasklet_kill(&ahc->platform_data->runq_tasklet);
if (ahc->platform_data->host != NULL) {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
scsi_remove_host(ahc->platform_data->host);
-#endif
scsi_host_put(ahc->platform_data->host);
}
@@ -1787,16 +1377,7 @@ ahc_platform_free(struct ahc_softc *ahc)
release_mem_region(ahc->platform_data->mem_busaddr,
0x1000);
}
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
- /*
- * In 2.4 we detach from the scsi midlayer before the PCI
- * layer invokes our remove callback. No per-instance
- * detach is provided, so we must reach inside the PCI
- * subsystem's internals and detach our driver manually.
- */
- if (ahc->dev_softc != NULL)
- ahc->dev_softc->driver = NULL;
-#endif
+
free(ahc->platform_data, M_DEVBUF);
}
}
@@ -1820,7 +1401,7 @@ ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
dev = ahc_linux_get_device(ahc, devinfo->channel - 'A',
devinfo->target,
- devinfo->lun, /*alloc*/FALSE);
+ devinfo->lun);
if (dev == NULL)
return;
was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
@@ -1873,7 +1454,6 @@ ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
dev->maxtags = 0;
dev->openings = 1 - dev->active;
}
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
if (dev->scsi_device != NULL) {
switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
case AHC_DEV_Q_BASIC:
@@ -1899,90 +1479,13 @@ ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
break;
}
}
-#endif
}
int
ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
int lun, u_int tag, role_t role, uint32_t status)
{
- int chan;
- int maxchan;
- int targ;
- int maxtarg;
- int clun;
- int maxlun;
- int count;
-
- if (tag != SCB_LIST_NULL)
- return (0);
-
- chan = 0;
- if (channel != ALL_CHANNELS) {
- chan = channel - 'A';
- maxchan = chan + 1;
- } else {
- maxchan = (ahc->features & AHC_TWIN) ? 2 : 1;
- }
- targ = 0;
- if (target != CAM_TARGET_WILDCARD) {
- targ = target;
- maxtarg = targ + 1;
- } else {
- maxtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
- }
- clun = 0;
- if (lun != CAM_LUN_WILDCARD) {
- clun = lun;
- maxlun = clun + 1;
- } else {
- maxlun = AHC_NUM_LUNS;
- }
-
- count = 0;
- for (; chan < maxchan; chan++) {
-
- for (; targ < maxtarg; targ++) {
-
- for (; clun < maxlun; clun++) {
- struct ahc_linux_device *dev;
- struct ahc_busyq *busyq;
- struct ahc_cmd *acmd;
-
- dev = ahc_linux_get_device(ahc, chan,
- targ, clun,
- /*alloc*/FALSE);
- if (dev == NULL)
- continue;
-
- busyq = &dev->busyq;
- while ((acmd = TAILQ_FIRST(busyq)) != NULL) {
- Scsi_Cmnd *cmd;
-
- cmd = &acmd_scsi_cmd(acmd);
- TAILQ_REMOVE(busyq, acmd,
- acmd_links.tqe);
- count++;
- cmd->result = status << 16;
- ahc_linux_queue_cmd_complete(ahc, cmd);
- }
- }
- }
- }
-
- return (count);
-}
-
-static void
-ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc)
-{
- u_long flags;
-
- ahc_lock(ahc, &flags);
- del_timer(&ahc->platform_data->completeq_timer);
- ahc->platform_data->flags &= ~AHC_RUN_CMPLT_Q_TIMER;
- ahc_linux_run_complete_queue(ahc);
- ahc_unlock(ahc, &flags);
+ return 0;
}
static u_int
@@ -2045,213 +1548,200 @@ ahc_linux_device_queue_depth(struct ahc_softc *ahc,
}
}
-static void
-ahc_linux_run_device_queue(struct ahc_softc *ahc, struct ahc_linux_device *dev)
+static int
+ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
+ struct scsi_cmnd *cmd)
{
- struct ahc_cmd *acmd;
- struct scsi_cmnd *cmd;
struct scb *scb;
struct hardware_scb *hscb;
struct ahc_initiator_tinfo *tinfo;
struct ahc_tmode_tstate *tstate;
uint16_t mask;
+ struct scb_tailq *untagged_q = NULL;
- if ((dev->flags & AHC_DEV_ON_RUN_LIST) != 0)
- panic("running device on run list");
+ /*
+ * Schedule us to run later. The only reason we are not
+ * running is because the whole controller Q is frozen.
+ */
+ if (ahc->platform_data->qfrozen != 0)
+ return SCSI_MLQUEUE_HOST_BUSY;
- while ((acmd = TAILQ_FIRST(&dev->busyq)) != NULL
- && dev->openings > 0 && dev->qfrozen == 0) {
+ /*
+ * We only allow one untagged transaction
+ * per target in the initiator role unless
+ * we are storing a full busy target *lun*
+ * table in SCB space.
+ */
+ if (!blk_rq_tagged(cmd->request)
+ && (ahc->features & AHC_SCB_BTT) == 0) {
+ int target_offset;
- /*
- * Schedule us to run later. The only reason we are not
- * running is because the whole controller Q is frozen.
- */
- if (ahc->platform_data->qfrozen != 0) {
- TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq,
- dev, links);
- dev->flags |= AHC_DEV_ON_RUN_LIST;
- return;
- }
- /*
- * Get an scb to use.
- */
- if ((scb = ahc_get_scb(ahc)) == NULL) {
- TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq,
- dev, links);
- dev->flags |= AHC_DEV_ON_RUN_LIST;
- ahc->flags |= AHC_RESOURCE_SHORTAGE;
- return;
- }
- TAILQ_REMOVE(&dev->busyq, acmd, acmd_links.tqe);
- cmd = &acmd_scsi_cmd(acmd);
- scb->io_ctx = cmd;
- scb->platform_data->dev = dev;
- hscb = scb->hscb;
- cmd->host_scribble = (char *)scb;
+ target_offset = cmd->device->id + cmd->device->channel * 8;
+ untagged_q = &(ahc->untagged_queues[target_offset]);
+ if (!TAILQ_EMPTY(untagged_q))
+ /* if we're already executing an untagged command
+ * we're busy to another */
+ return SCSI_MLQUEUE_DEVICE_BUSY;
+ }
- /*
- * Fill out basics of the HSCB.
- */
- hscb->control = 0;
- hscb->scsiid = BUILD_SCSIID(ahc, cmd);
- hscb->lun = cmd->device->lun;
- mask = SCB_GET_TARGET_MASK(ahc, scb);
- tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
- SCB_GET_OUR_ID(scb),
- SCB_GET_TARGET(ahc, scb), &tstate);
- hscb->scsirate = tinfo->scsirate;
- hscb->scsioffset = tinfo->curr.offset;
- if ((tstate->ultraenb & mask) != 0)
- hscb->control |= ULTRAENB;
-
- if ((ahc->user_discenable & mask) != 0)
- hscb->control |= DISCENB;
-
- if ((tstate->auto_negotiate & mask) != 0) {
- scb->flags |= SCB_AUTO_NEGOTIATE;
- scb->hscb->control |= MK_MESSAGE;
- }
+ /*
+ * Get an scb to use.
+ */
+ if ((scb = ahc_get_scb(ahc)) == NULL) {
+ ahc->flags |= AHC_RESOURCE_SHORTAGE;
+ return SCSI_MLQUEUE_HOST_BUSY;
+ }
- if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
- int msg_bytes;
- uint8_t tag_msgs[2];
+ scb->io_ctx = cmd;
+ scb->platform_data->dev = dev;
+ hscb = scb->hscb;
+ cmd->host_scribble = (char *)scb;
- msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
- if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
- hscb->control |= tag_msgs[0];
- if (tag_msgs[0] == MSG_ORDERED_TASK)
- dev->commands_since_idle_or_otag = 0;
- } else
-#endif
- if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
- && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
- hscb->control |= MSG_ORDERED_TASK;
+ /*
+ * Fill out basics of the HSCB.
+ */
+ hscb->control = 0;
+ hscb->scsiid = BUILD_SCSIID(ahc, cmd);
+ hscb->lun = cmd->device->lun;
+ mask = SCB_GET_TARGET_MASK(ahc, scb);
+ tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
+ SCB_GET_OUR_ID(scb),
+ SCB_GET_TARGET(ahc, scb), &tstate);
+ hscb->scsirate = tinfo->scsirate;
+ hscb->scsioffset = tinfo->curr.offset;
+ if ((tstate->ultraenb & mask) != 0)
+ hscb->control |= ULTRAENB;
+
+ if ((ahc->user_discenable & mask) != 0)
+ hscb->control |= DISCENB;
+
+ if ((tstate->auto_negotiate & mask) != 0) {
+ scb->flags |= SCB_AUTO_NEGOTIATE;
+ scb->hscb->control |= MK_MESSAGE;
+ }
+
+ if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
+ int msg_bytes;
+ uint8_t tag_msgs[2];
+
+ msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
+ if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
+ hscb->control |= tag_msgs[0];
+ if (tag_msgs[0] == MSG_ORDERED_TASK)
dev->commands_since_idle_or_otag = 0;
- } else {
- hscb->control |= MSG_SIMPLE_TASK;
- }
- }
-
- hscb->cdb_len = cmd->cmd_len;
- if (hscb->cdb_len <= 12) {
- memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
+ } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
+ && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
+ hscb->control |= MSG_ORDERED_TASK;
+ dev->commands_since_idle_or_otag = 0;
} else {
- memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
- scb->flags |= SCB_CDB32_PTR;
+ hscb->control |= MSG_SIMPLE_TASK;
}
+ }
- scb->platform_data->xfer_len = 0;
- ahc_set_residual(scb, 0);
- ahc_set_sense_residual(scb, 0);
- scb->sg_count = 0;
- if (cmd->use_sg != 0) {
- struct ahc_dma_seg *sg;
- struct scatterlist *cur_seg;
- struct scatterlist *end_seg;
- int nseg;
-
- cur_seg = (struct scatterlist *)cmd->request_buffer;
- nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg,
- cmd->sc_data_direction);
- end_seg = cur_seg + nseg;
- /* Copy the segments into the SG list. */
- sg = scb->sg_list;
- /*
- * The sg_count may be larger than nseg if
- * a transfer crosses a 32bit page.
- */
- while (cur_seg < end_seg) {
- dma_addr_t addr;
- bus_size_t len;
- int consumed;
-
- addr = sg_dma_address(cur_seg);
- len = sg_dma_len(cur_seg);
- consumed = ahc_linux_map_seg(ahc, scb,
- sg, addr, len);
- sg += consumed;
- scb->sg_count += consumed;
- cur_seg++;
- }
- sg--;
- sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
-
- /*
- * Reset the sg list pointer.
- */
- scb->hscb->sgptr =
- ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
+ hscb->cdb_len = cmd->cmd_len;
+ if (hscb->cdb_len <= 12) {
+ memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
+ } else {
+ memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
+ scb->flags |= SCB_CDB32_PTR;
+ }
- /*
- * Copy the first SG into the "current"
- * data pointer area.
- */
- scb->hscb->dataptr = scb->sg_list->addr;
- scb->hscb->datacnt = scb->sg_list->len;
- } else if (cmd->request_bufflen != 0) {
- struct ahc_dma_seg *sg;
+ scb->platform_data->xfer_len = 0;
+ ahc_set_residual(scb, 0);
+ ahc_set_sense_residual(scb, 0);
+ scb->sg_count = 0;
+ if (cmd->use_sg != 0) {
+ struct ahc_dma_seg *sg;
+ struct scatterlist *cur_seg;
+ struct scatterlist *end_seg;
+ int nseg;
+
+ cur_seg = (struct scatterlist *)cmd->request_buffer;
+ nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg,
+ cmd->sc_data_direction);
+ end_seg = cur_seg + nseg;
+ /* Copy the segments into the SG list. */
+ sg = scb->sg_list;
+ /*
+ * The sg_count may be larger than nseg if
+ * a transfer crosses a 32bit page.
+ */
+ while (cur_seg < end_seg) {
dma_addr_t addr;
-
- sg = scb->sg_list;
- addr = pci_map_single(ahc->dev_softc,
- cmd->request_buffer,
- cmd->request_bufflen,
- cmd->sc_data_direction);
- scb->platform_data->buf_busaddr = addr;
- scb->sg_count = ahc_linux_map_seg(ahc, scb,
- sg, addr,
- cmd->request_bufflen);
- sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
-
- /*
- * Reset the sg list pointer.
- */
- scb->hscb->sgptr =
- ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
-
- /*
- * Copy the first SG into the "current"
- * data pointer area.
- */
- scb->hscb->dataptr = sg->addr;
- scb->hscb->datacnt = sg->len;
- } else {
- scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
- scb->hscb->dataptr = 0;
- scb->hscb->datacnt = 0;
- scb->sg_count = 0;
+ bus_size_t len;
+ int consumed;
+
+ addr = sg_dma_address(cur_seg);
+ len = sg_dma_len(cur_seg);
+ consumed = ahc_linux_map_seg(ahc, scb,
+ sg, addr, len);
+ sg += consumed;
+ scb->sg_count += consumed;
+ cur_seg++;
}
+ sg--;
+ sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
- ahc_sync_sglist(ahc, scb, BUS_DMASYNC_PREWRITE);
- LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
- dev->openings--;
- dev->active++;
- dev->commands_issued++;
- if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
- dev->commands_since_idle_or_otag++;
+ /*
+ * Reset the sg list pointer.
+ */
+ scb->hscb->sgptr =
+ ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
+
+ /*
+ * Copy the first SG into the "current"
+ * data pointer area.
+ */
+ scb->hscb->dataptr = scb->sg_list->addr;
+ scb->hscb->datacnt = scb->sg_list->len;
+ } else if (cmd->request_bufflen != 0) {
+ struct ahc_dma_seg *sg;
+ dma_addr_t addr;
+
+ sg = scb->sg_list;
+ addr = pci_map_single(ahc->dev_softc,
+ cmd->request_buffer,
+ cmd->request_bufflen,
+ cmd->sc_data_direction);
+ scb->platform_data->buf_busaddr = addr;
+ scb->sg_count = ahc_linux_map_seg(ahc, scb,
+ sg, addr,
+ cmd->request_bufflen);
+ sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
/*
- * We only allow one untagged transaction
- * per target in the initiator role unless
- * we are storing a full busy target *lun*
- * table in SCB space.
+ * Reset the sg list pointer.
*/
- if ((scb->hscb->control & (TARGET_SCB|TAG_ENB)) == 0
- && (ahc->features & AHC_SCB_BTT) == 0) {
- struct scb_tailq *untagged_q;
- int target_offset;
-
- target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
- untagged_q = &(ahc->untagged_queues[target_offset]);
- TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
- scb->flags |= SCB_UNTAGGEDQ;
- if (TAILQ_FIRST(untagged_q) != scb)
- continue;
- }
- scb->flags |= SCB_ACTIVE;
- ahc_queue_scb(ahc, scb);
+ scb->hscb->sgptr =
+ ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
+
+ /*
+ * Copy the first SG into the "current"
+ * data pointer area.
+ */
+ scb->hscb->dataptr = sg->addr;
+ scb->hscb->datacnt = sg->len;
+ } else {
+ scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
+ scb->hscb->dataptr = 0;
+ scb->hscb->datacnt = 0;
+ scb->sg_count = 0;
}
+
+ LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
+ dev->openings--;
+ dev->active++;
+ dev->commands_issued++;
+ if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
+ dev->commands_since_idle_or_otag++;
+
+ scb->flags |= SCB_ACTIVE;
+ if (untagged_q) {
+ TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
+ scb->flags |= SCB_UNTAGGEDQ;
+ }
+ ahc_queue_scb(ahc, scb);
+ return 0;
}
/*
@@ -2267,9 +1757,6 @@ ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
ahc = (struct ahc_softc *) dev_id;
ahc_lock(ahc, &flags);
ours = ahc_intr(ahc);
- if (ahc_linux_next_device_to_run(ahc) != NULL)
- ahc_schedule_runq(ahc);
- ahc_linux_run_complete_queue(ahc);
ahc_unlock(ahc, &flags);
return IRQ_RETVAL(ours);
}
@@ -2278,8 +1765,6 @@ void
ahc_platform_flushwork(struct ahc_softc *ahc)
{
- while (ahc_linux_run_complete_queue(ahc) != NULL)
- ;
}
static struct ahc_linux_target*
@@ -2348,9 +1833,6 @@ ahc_linux_alloc_device(struct ahc_softc *ahc,
if (dev == NULL)
return (NULL);
memset(dev, 0, sizeof(*dev));
- init_timer(&dev->timer);
- TAILQ_INIT(&dev->busyq);
- dev->flags = AHC_DEV_UNCONFIGURED;
dev->lun = lun;
dev->target = targ;
@@ -2373,7 +1855,7 @@ ahc_linux_alloc_device(struct ahc_softc *ahc,
}
static void
-__ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev)
+ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev)
{
struct ahc_linux_target *targ;
@@ -2385,13 +1867,6 @@ __ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev)
ahc_linux_free_target(ahc, targ);
}
-static void
-ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev)
-{
- del_timer_sync(&dev->timer);
- __ahc_linux_free_device(ahc, dev);
-}
-
void
ahc_send_async(struct ahc_softc *ahc, char channel,
u_int target, u_int lun, ac_code code, void *arg)
@@ -2463,28 +1938,9 @@ ahc_send_async(struct ahc_softc *ahc, char channel,
}
case AC_SENT_BDR:
{
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
WARN_ON(lun != CAM_LUN_WILDCARD);
scsi_report_device_reset(ahc->platform_data->host,
channel - 'A', target);
-#else
- Scsi_Device *scsi_dev;
-
- /*
- * Find the SCSI device associated with this
- * request and indicate that a UA is expected.
- */
- for (scsi_dev = ahc->platform_data->host->host_queue;
- scsi_dev != NULL; scsi_dev = scsi_dev->next) {
- if (channel - 'A' == scsi_dev->channel
- && target == scsi_dev->id
- && (lun == CAM_LUN_WILDCARD
- || lun == scsi_dev->lun)) {
- scsi_dev->was_reset = 1;
- scsi_dev->expecting_cc_ua = 1;
- }
- }
-#endif
break;
}
case AC_BUS_RESET:
@@ -2504,7 +1960,7 @@ ahc_send_async(struct ahc_softc *ahc, char channel,
void
ahc_done(struct ahc_softc *ahc, struct scb *scb)
{
- Scsi_Cmnd *cmd;
+ struct scsi_cmnd *cmd;
struct ahc_linux_device *dev;
LIST_REMOVE(scb, pending_links);
@@ -2515,7 +1971,7 @@ ahc_done(struct ahc_softc *ahc, struct scb *scb)
target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
untagged_q = &(ahc->untagged_queues[target_offset]);
TAILQ_REMOVE(untagged_q, scb, links.tqe);
- ahc_run_untagged_queue(ahc, untagged_q);
+ BUG_ON(!TAILQ_EMPTY(untagged_q));
}
if ((scb->flags & SCB_ACTIVE) == 0) {
@@ -2583,8 +2039,6 @@ ahc_done(struct ahc_softc *ahc, struct scb *scb)
}
} else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
ahc_linux_handle_scsi_status(ahc, dev, scb);
- } else if (ahc_get_transaction_status(scb) == CAM_SEL_TIMEOUT) {
- dev->flags |= AHC_DEV_UNCONFIGURED;
}
if (dev->openings == 1
@@ -2606,16 +2060,6 @@ ahc_done(struct ahc_softc *ahc, struct scb *scb)
if (dev->active == 0)
dev->commands_since_idle_or_otag = 0;
- if (TAILQ_EMPTY(&dev->busyq)) {
- if ((dev->flags & AHC_DEV_UNCONFIGURED) != 0
- && dev->active == 0
- && (dev->flags & AHC_DEV_TIMER_ACTIVE) == 0)
- ahc_linux_free_device(ahc, dev);
- } else if ((dev->flags & AHC_DEV_ON_RUN_LIST) == 0) {
- TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, dev, links);
- dev->flags |= AHC_DEV_ON_RUN_LIST;
- }
-
if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
printf("Recovery SCB completes\n");
if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
@@ -2659,7 +2103,7 @@ ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
case SCSI_STATUS_CHECK_COND:
case SCSI_STATUS_CMD_TERMINATED:
{
- Scsi_Cmnd *cmd;
+ struct scsi_cmnd *cmd;
/*
* Copy sense information to the OS's cmd
@@ -2754,52 +2198,15 @@ ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
ahc_platform_set_tags(ahc, &devinfo,
(dev->flags & AHC_DEV_Q_BASIC)
? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
- /* FALLTHROUGH */
- }
- case SCSI_STATUS_BUSY:
- {
- /*
- * Set a short timer to defer sending commands for
- * a bit since Linux will not delay in this case.
- */
- if ((dev->flags & AHC_DEV_TIMER_ACTIVE) != 0) {
- printf("%s:%c:%d: Device Timer still active during "
- "busy processing\n", ahc_name(ahc),
- dev->target->channel, dev->target->target);
- break;
- }
- dev->flags |= AHC_DEV_TIMER_ACTIVE;
- dev->qfrozen++;
- init_timer(&dev->timer);
- dev->timer.data = (u_long)dev;
- dev->timer.expires = jiffies + (HZ/2);
- dev->timer.function = ahc_linux_dev_timed_unfreeze;
- add_timer(&dev->timer);
break;
}
}
}
static void
-ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, Scsi_Cmnd *cmd)
+ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
{
/*
- * Typically, the complete queue has very few entries
- * queued to it before the queue is emptied by
- * ahc_linux_run_complete_queue, so sorting the entries
- * by generation number should be inexpensive.
- * We perform the sort so that commands that complete
- * with an error are retuned in the order origionally
- * queued to the controller so that any subsequent retries
- * are performed in order. The underlying ahc routines do
- * not guarantee the order that aborted commands will be
- * returned to us.
- */
- struct ahc_completeq *completeq;
- struct ahc_cmd *list_cmd;
- struct ahc_cmd *acmd;
-
- /*
* Map CAM error codes into Linux Error codes. We
* avoid the conversion so that the DV code has the
* full error information available when making
@@ -2852,26 +2259,7 @@ ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, Scsi_Cmnd *cmd)
new_status = DID_ERROR;
break;
case CAM_REQUEUE_REQ:
- /*
- * If we want the request requeued, make sure there
- * are sufficent retries. In the old scsi error code,
- * we used to be able to specify a result code that
- * bypassed the retry count. Now we must use this
- * hack. We also "fake" a check condition with
- * a sense code of ABORTED COMMAND. This seems to
- * evoke a retry even if this command is being sent
- * via the eh thread. Ick! Ick! Ick!
- */
- if (cmd->retries > 0)
- cmd->retries--;
- new_status = DID_OK;
- ahc_cmd_set_scsi_status(cmd, SCSI_STATUS_CHECK_COND);
- cmd->result |= (DRIVER_SENSE << 24);
- memset(cmd->sense_buffer, 0,
- sizeof(cmd->sense_buffer));
- cmd->sense_buffer[0] = SSD_ERRCODE_VALID
- | SSD_CURRENT_ERROR;
- cmd->sense_buffer[2] = SSD_KEY_ABORTED_COMMAND;
+ new_status = DID_REQUEUE;
break;
default:
/* We should never get here */
@@ -2882,17 +2270,7 @@ ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, Scsi_Cmnd *cmd)
ahc_cmd_set_transaction_status(cmd, new_status);
}
- completeq = &ahc->platform_data->completeq;
- list_cmd = TAILQ_FIRST(completeq);
- acmd = (struct ahc_cmd *)cmd;
- while (list_cmd != NULL
- && acmd_scsi_cmd(list_cmd).serial_number
- < acmd_scsi_cmd(acmd).serial_number)
- list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe);
- if (list_cmd != NULL)
- TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe);
- else
- TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe);
+ cmd->scsi_done(cmd);
}
static void
@@ -2940,7 +2318,6 @@ ahc_linux_release_simq(u_long arg)
ahc->platform_data->qfrozen--;
if (ahc->platform_data->qfrozen == 0)
unblock_reqs = 1;
- ahc_schedule_runq(ahc);
ahc_unlock(ahc, &s);
/*
* There is still a race here. The mid-layer
@@ -2952,37 +2329,12 @@ ahc_linux_release_simq(u_long arg)
scsi_unblock_requests(ahc->platform_data->host);
}
-static void
-ahc_linux_dev_timed_unfreeze(u_long arg)
-{
- struct ahc_linux_device *dev;
- struct ahc_softc *ahc;
- u_long s;
-
- dev = (struct ahc_linux_device *)arg;
- ahc = dev->target->ahc;
- ahc_lock(ahc, &s);
- dev->flags &= ~AHC_DEV_TIMER_ACTIVE;
- if (dev->qfrozen > 0)
- dev->qfrozen--;
- if (dev->qfrozen == 0
- && (dev->flags & AHC_DEV_ON_RUN_LIST) == 0)
- ahc_linux_run_device_queue(ahc, dev);
- if (TAILQ_EMPTY(&dev->busyq)
- && dev->active == 0)
- __ahc_linux_free_device(ahc, dev);
- ahc_unlock(ahc, &s);
-}
-
static int
-ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag)
+ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
{
struct ahc_softc *ahc;
- struct ahc_cmd *acmd;
- struct ahc_cmd *list_acmd;
struct ahc_linux_device *dev;
struct scb *pending_scb;
- u_long s;
u_int saved_scbptr;
u_int active_scb_index;
u_int last_phase;
@@ -2998,7 +2350,6 @@ ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag)
paused = FALSE;
wait = FALSE;
ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
- acmd = (struct ahc_cmd *)cmd;
printf("%s:%d:%d:%d: Attempting to queue a%s message\n",
ahc_name(ahc), cmd->device->channel,
@@ -3011,22 +2362,6 @@ ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag)
printf("\n");
/*
- * In all versions of Linux, we have to work around
- * a major flaw in how the mid-layer is locked down
- * if we are to sleep successfully in our error handler
- * while allowing our interrupt handler to run. Since
- * the midlayer acquires either the io_request_lock or
- * our lock prior to calling us, we must use the
- * spin_unlock_irq() method for unlocking our lock.
- * This will force interrupts to be enabled on the
- * current CPU. Since the EH thread should not have
- * been running with CPU interrupts disabled other than
- * by acquiring either the io_request_lock or our own
- * lock, this *should* be safe.
- */
- ahc_midlayer_entrypoint_lock(ahc, &s);
-
- /*
* First determine if we currently own this command.
* Start by searching the device queue. If not found
* there, check the pending_scb list. If not found
@@ -3034,7 +2369,7 @@ ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag)
* command, return success.
*/
dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id,
- cmd->device->lun, /*alloc*/FALSE);
+ cmd->device->lun);
if (dev == NULL) {
/*
@@ -3048,24 +2383,6 @@ ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag)
goto no_cmd;
}
- TAILQ_FOREACH(list_acmd, &dev->busyq, acmd_links.tqe) {
- if (list_acmd == acmd)
- break;
- }
-
- if (list_acmd != NULL) {
- printf("%s:%d:%d:%d: Command found on device queue\n",
- ahc_name(ahc), cmd->device->channel, cmd->device->id,
- cmd->device->lun);
- if (flag == SCB_ABORT) {
- TAILQ_REMOVE(&dev->busyq, list_acmd, acmd_links.tqe);
- cmd->result = DID_ABORT << 16;
- ahc_linux_queue_cmd_complete(ahc, cmd);
- retval = SUCCESS;
- goto done;
- }
- }
-
if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
&& ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
cmd->device->channel + 'A',
@@ -3299,53 +2616,42 @@ done:
}
spin_lock_irq(&ahc->platform_data->spin_lock);
}
- ahc_schedule_runq(ahc);
- ahc_linux_run_complete_queue(ahc);
- ahc_midlayer_entrypoint_unlock(ahc, &s);
return (retval);
}
void
ahc_platform_dump_card_state(struct ahc_softc *ahc)
{
- struct ahc_linux_device *dev;
- int channel;
- int maxchannel;
- int target;
- int maxtarget;
- int lun;
- int i;
-
- maxchannel = (ahc->features & AHC_TWIN) ? 1 : 0;
- maxtarget = (ahc->features & AHC_WIDE) ? 15 : 7;
- for (channel = 0; channel <= maxchannel; channel++) {
+}
- for (target = 0; target <=maxtarget; target++) {
+static void ahc_linux_exit(void);
- for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
- struct ahc_cmd *acmd;
+static void ahc_linux_get_width(struct scsi_target *starget)
+{
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+ struct ahc_tmode_tstate *tstate;
+ struct ahc_initiator_tinfo *tinfo
+ = ahc_fetch_transinfo(ahc,
+ starget->channel + 'A',
+ shost->this_id, starget->id, &tstate);
+ spi_width(starget) = tinfo->curr.width;
+}
- dev = ahc_linux_get_device(ahc, channel, target,
- lun, /*alloc*/FALSE);
- if (dev == NULL)
- continue;
+static void ahc_linux_set_width(struct scsi_target *starget, int width)
+{
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
+ struct ahc_devinfo devinfo;
+ unsigned long flags;
- printf("DevQ(%d:%d:%d): ",
- channel, target, lun);
- i = 0;
- TAILQ_FOREACH(acmd, &dev->busyq,
- acmd_links.tqe) {
- if (i++ > AHC_SCB_MAX)
- break;
- }
- printf("%d waiting\n", i);
- }
- }
- }
+ ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
+ starget->channel + 'A', ROLE_INITIATOR);
+ ahc_lock(ahc, &flags);
+ ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
+ ahc_unlock(ahc, &flags);
}
-static void ahc_linux_exit(void);
-
static void ahc_linux_get_period(struct scsi_target *starget)
{
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
@@ -3376,8 +2682,21 @@ static void ahc_linux_set_period(struct scsi_target *starget, int period)
if (offset == 0)
offset = MAX_OFFSET;
+ if (period < 9)
+ period = 9; /* 12.5ns is our minimum */
+ if (period == 9)
+ ppr_options |= MSG_EXT_PPR_DT_REQ;
+
ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
starget->channel + 'A', ROLE_INITIATOR);
+
+ /* all PPR requests apart from QAS require wide transfers */
+ if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
+ ahc_linux_get_width(starget);
+ if (spi_width(starget) == 0)
+ ppr_options &= MSG_EXT_PPR_QAS_REQ;
+ }
+
syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
ahc_lock(ahc, &flags);
ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
@@ -3425,32 +2744,6 @@ static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
ahc_unlock(ahc, &flags);
}
-static void ahc_linux_get_width(struct scsi_target *starget)
-{
- struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
- struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
- struct ahc_tmode_tstate *tstate;
- struct ahc_initiator_tinfo *tinfo
- = ahc_fetch_transinfo(ahc,
- starget->channel + 'A',
- shost->this_id, starget->id, &tstate);
- spi_width(starget) = tinfo->curr.width;
-}
-
-static void ahc_linux_set_width(struct scsi_target *starget, int width)
-{
- struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
- struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
- struct ahc_devinfo devinfo;
- unsigned long flags;
-
- ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
- starget->channel + 'A', ROLE_INITIATOR);
- ahc_lock(ahc, &flags);
- ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
- ahc_unlock(ahc, &flags);
-}
-
static void ahc_linux_get_dt(struct scsi_target *starget)
{
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
@@ -3479,10 +2772,15 @@ static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
unsigned long flags;
struct ahc_syncrate *syncrate;
+ if (dt) {
+ period = 9; /* 12.5ns is the only period valid for DT */
+ ppr_options |= MSG_EXT_PPR_DT_REQ;
+ } else if (period == 9)
+ period = 10; /* if resetting DT, period must be >= 25ns */
+
ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
starget->channel + 'A', ROLE_INITIATOR);
- syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
- dt ? AHC_SYNCRATE_DT : AHC_SYNCRATE_ULTRA2);
+ syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
ahc_lock(ahc, &flags);
ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
ppr_options, AHC_TRANS_GOAL, FALSE);
@@ -3514,7 +2812,6 @@ static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
unsigned int ppr_options = tinfo->curr.ppr_options
& ~MSG_EXT_PPR_QAS_REQ;
unsigned int period = tinfo->curr.period;
- unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
unsigned long flags;
struct ahc_syncrate *syncrate;
@@ -3523,8 +2820,7 @@ static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
starget->channel + 'A', ROLE_INITIATOR);
- syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
- dt ? AHC_SYNCRATE_DT : AHC_SYNCRATE_ULTRA2);
+ syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
ahc_lock(ahc, &flags);
ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
ppr_options, AHC_TRANS_GOAL, FALSE);
@@ -3556,7 +2852,6 @@ static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
unsigned int ppr_options = tinfo->curr.ppr_options
& ~MSG_EXT_PPR_IU_REQ;
unsigned int period = tinfo->curr.period;
- unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
unsigned long flags;
struct ahc_syncrate *syncrate;
@@ -3565,8 +2860,7 @@ static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
starget->channel + 'A', ROLE_INITIATOR);
- syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
- dt ? AHC_SYNCRATE_DT : AHC_SYNCRATE_ULTRA2);
+ syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
ahc_lock(ahc, &flags);
ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
ppr_options, AHC_TRANS_GOAL, FALSE);
@@ -3599,7 +2893,6 @@ static struct spi_function_template ahc_linux_transport_functions = {
static int __init
ahc_linux_init(void)
{
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
ahc_linux_transport_template = spi_attach_transport(&ahc_linux_transport_functions);
if (!ahc_linux_transport_template)
return -ENODEV;
@@ -3608,29 +2901,11 @@ ahc_linux_init(void)
spi_release_transport(ahc_linux_transport_template);
ahc_linux_exit();
return -ENODEV;
-#else
- scsi_register_module(MODULE_SCSI_HA, &aic7xxx_driver_template);
- if (aic7xxx_driver_template.present == 0) {
- scsi_unregister_module(MODULE_SCSI_HA,
- &aic7xxx_driver_template);
- return (-ENODEV);
- }
-
- return (0);
-#endif
}
static void
ahc_linux_exit(void)
{
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
- /*
- * In 2.4 we have to unregister from the PCI core _after_
- * unregistering from the scsi midlayer to avoid dangling
- * references.
- */
- scsi_unregister_module(MODULE_SCSI_HA, &aic7xxx_driver_template);
-#endif
ahc_linux_pci_exit();
ahc_linux_eisa_exit();
spi_release_transport(ahc_linux_transport_template);