#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/delay.h> /* For ssleep/msleep */
*/
spinlock_t ahd_list_spinlock;
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
-/* For dynamic sglist size calculation. */
-u_int ahd_linux_nseg;
-#endif
-
/*
* Bucket size for counting good commands in between bad ones.
*/
static void ahd_linux_dev_timed_unfreeze(u_long arg);
static void ahd_linux_sem_timeout(u_long arg);
static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
-static void ahd_linux_size_nseg(void);
static void ahd_linux_thread_run_complete_queue(struct ahd_softc *ahd);
static void ahd_linux_start_dv(struct ahd_softc *ahd);
static void ahd_linux_dv_timeout(struct scsi_cmnd *cmd);
u_int);
static void ahd_linux_free_device(struct ahd_softc*,
struct ahd_linux_device*);
-static void ahd_linux_run_device_queue(struct ahd_softc*,
- struct ahd_linux_device*);
+static int ahd_linux_run_command(struct ahd_softc*,
+ struct ahd_linux_device*,
+ struct scsi_cmnd *);
static void ahd_linux_setup_tag_info_global(char *p);
static aic_option_callback_t ahd_linux_setup_tag_info;
static aic_option_callback_t ahd_linux_setup_rd_strm_info;
static aic_option_callback_t ahd_linux_setup_dv;
static aic_option_callback_t ahd_linux_setup_iocell_info;
static int ahd_linux_next_unit(void);
-static void ahd_runq_tasklet(unsigned long data);
static int aic79xx_setup(char *c);
/****************************** Inlines ***************************************/
static __inline void ahd_schedule_completeq(struct ahd_softc *ahd);
-static __inline void ahd_schedule_runq(struct ahd_softc *ahd);
-static __inline void ahd_setup_runq_tasklet(struct ahd_softc *ahd);
-static __inline void ahd_teardown_runq_tasklet(struct ahd_softc *ahd);
static __inline struct ahd_linux_device*
ahd_linux_get_device(struct ahd_softc *ahd, u_int channel,
u_int target, u_int lun, int alloc);
static struct ahd_cmd *ahd_linux_run_complete_queue(struct ahd_softc *ahd);
-static __inline void ahd_linux_check_device_queue(struct ahd_softc *ahd,
- struct ahd_linux_device *dev);
-static __inline struct ahd_linux_device *
- ahd_linux_next_device_to_run(struct ahd_softc *ahd);
-static __inline void ahd_linux_run_device_queues(struct ahd_softc *ahd);
static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
static __inline void
}
}
-/*
- * Must be called with our lock held.
- */
-static __inline void
-ahd_schedule_runq(struct ahd_softc *ahd)
-{
- tasklet_schedule(&ahd->platform_data->runq_tasklet);
-}
-
-static __inline
-void ahd_setup_runq_tasklet(struct ahd_softc *ahd)
-{
- tasklet_init(&ahd->platform_data->runq_tasklet, ahd_runq_tasklet,
- (unsigned long)ahd);
-}
-
-static __inline void
-ahd_teardown_runq_tasklet(struct ahd_softc *ahd)
-{
- tasklet_kill(&ahd->platform_data->runq_tasklet);
-}
-
static __inline struct ahd_linux_device*
ahd_linux_get_device(struct ahd_softc *ahd, u_int channel, u_int target,
u_int lun, int alloc)
return (acmd);
}
-static __inline void
-ahd_linux_check_device_queue(struct ahd_softc *ahd,
- struct ahd_linux_device *dev)
-{
- if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) != 0
- && dev->active == 0) {
- dev->flags &= ~AHD_DEV_FREEZE_TIL_EMPTY;
- dev->qfrozen--;
- }
-
- if (TAILQ_FIRST(&dev->busyq) == NULL
- || dev->openings == 0 || dev->qfrozen != 0)
- return;
-
- ahd_linux_run_device_queue(ahd, dev);
-}
-
-static __inline struct ahd_linux_device *
-ahd_linux_next_device_to_run(struct ahd_softc *ahd)
-{
-
- if ((ahd->flags & AHD_RESOURCE_SHORTAGE) != 0
- || (ahd->platform_data->qfrozen != 0
- && AHD_DV_SIMQ_FROZEN(ahd) == 0))
- return (NULL);
- return (TAILQ_FIRST(&ahd->platform_data->device_runq));
-}
-
-static __inline void
-ahd_linux_run_device_queues(struct ahd_softc *ahd)
-{
- struct ahd_linux_device *dev;
-
- while ((dev = ahd_linux_next_device_to_run(ahd)) != NULL) {
- TAILQ_REMOVE(&ahd->platform_data->device_runq, dev, links);
- dev->flags &= ~AHD_DEV_ON_RUN_LIST;
- ahd_linux_check_device_queue(ahd, dev);
- }
-}
-
static __inline void
ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
{
static int ahd_linux_detect(Scsi_Host_Template *);
static const char *ahd_linux_info(struct Scsi_Host *);
static int ahd_linux_queue(Scsi_Cmnd *, void (*)(Scsi_Cmnd *));
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
static int ahd_linux_slave_alloc(Scsi_Device *);
static int ahd_linux_slave_configure(Scsi_Device *);
static void ahd_linux_slave_destroy(Scsi_Device *);
static int ahd_linux_biosparam(struct scsi_device*,
struct block_device*, sector_t, int[]);
#endif
-#else
-static int ahd_linux_release(struct Scsi_Host *);
-static void ahd_linux_select_queue_depth(struct Scsi_Host *host,
- Scsi_Device *scsi_devs);
-#if defined(__i386__)
-static int ahd_linux_biosparam(Disk *, kdev_t, int[]);
-#endif
-#endif
static int ahd_linux_bus_reset(Scsi_Cmnd *);
static int ahd_linux_dev_reset(Scsi_Cmnd *);
static int ahd_linux_abort(Scsi_Cmnd *);
-/*
- * Calculate a safe value for AHD_NSEG (as expressed through ahd_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 SG 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
-ahd_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 < AHD_LINUX_MIN_NSEG)
- continue;
-
- if (best_size == 0) {
- best_size = cur_size;
- ahd_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;
- ahd_linux_nseg = nseg;
- }
- }
- }
-#endif
-}
/*
* Try to detect an Adaptec 79XX controller.
int found;
int error = 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
printf("ahd_linux_detect: Unable to attach\n");
return (0);
}
- /*
- * Determine an appropriate size for our Scatter Gatther lists.
- */
- ahd_linux_size_nseg();
+
#ifdef MODULE
/*
* If we've been passed any parameters, process them now.
if (ahd_linux_register_host(ahd, template) == 0)
found++;
}
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
- spin_lock_irq(&io_request_lock);
-#endif
aic79xx_detect_complete++;
return 0;
}
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
-/*
- * Free the passed in Scsi_Host memory structures prior to unloading the
- * module.
- */
-static int
-ahd_linux_release(struct Scsi_Host * host)
-{
- struct ahd_softc *ahd;
- u_long l;
-
- ahd_list_lock(&l);
- if (host != NULL) {
-
- /*
- * We should be able to just perform
- * the free directly, but check our
- * list for extra sanity.
- */
- ahd = ahd_find_softc(*(struct ahd_softc **)host->hostdata);
- if (ahd != NULL) {
- u_long s;
-
- ahd_lock(ahd, &s);
- ahd_intr_enable(ahd, FALSE);
- ahd_unlock(ahd, &s);
- ahd_free(ahd);
- }
- }
- ahd_list_unlock(&l);
- return (0);
-}
-#endif
-
/*
* Return a string describing the driver.
*/
{
struct ahd_softc *ahd;
struct ahd_linux_device *dev;
- u_long flags;
ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
- /*
- * Save the callback on completion function.
- */
- cmd->scsi_done = scsi_done;
-
- ahd_midlayer_entrypoint_lock(ahd, &flags);
-
/*
* Close the race of a command that was in the process of
* being queued to us just as our simq was frozen. Let
*/
if (ahd->platform_data->qfrozen != 0
&& AHD_DV_CMD(cmd) == 0) {
+ printf("%s: queue frozen\n", ahd_name(ahd));
- ahd_cmd_set_transaction_status(cmd, CAM_REQUEUE_REQ);
- ahd_linux_queue_cmd_complete(ahd, cmd);
- ahd_schedule_completeq(ahd);
- ahd_midlayer_entrypoint_unlock(ahd, &flags);
- return (0);
+ return SCSI_MLQUEUE_HOST_BUSY;
}
+
+ /*
+ * Save the callback on completion function.
+ */
+ cmd->scsi_done = scsi_done;
+
dev = ahd_linux_get_device(ahd, cmd->device->channel,
cmd->device->id, cmd->device->lun,
/*alloc*/TRUE);
- if (dev == NULL) {
- ahd_cmd_set_transaction_status(cmd, CAM_RESRC_UNAVAIL);
- ahd_linux_queue_cmd_complete(ahd, cmd);
- ahd_schedule_completeq(ahd);
- ahd_midlayer_entrypoint_unlock(ahd, &flags);
- printf("%s: aic79xx_linux_queue - Unable to allocate device!\n",
- ahd_name(ahd));
- return (0);
- }
- if (cmd->cmd_len > MAX_CDB_LEN)
- return (-EINVAL);
+ BUG_ON(dev == NULL);
+
cmd->result = CAM_REQ_INPROG << 16;
- TAILQ_INSERT_TAIL(&dev->busyq, (struct ahd_cmd *)cmd, acmd_links.tqe);
- if ((dev->flags & AHD_DEV_ON_RUN_LIST) == 0) {
- TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq, dev, links);
- dev->flags |= AHD_DEV_ON_RUN_LIST;
- ahd_linux_run_device_queues(ahd);
- }
- ahd_midlayer_entrypoint_unlock(ahd, &flags);
- return (0);
+
+ return ahd_linux_run_command(ahd, dev, cmd);
}
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
static int
ahd_linux_slave_alloc(Scsi_Device *device)
{
if (dev != NULL
&& (dev->flags & AHD_DEV_SLAVE_CONFIGURED) != 0) {
dev->flags |= AHD_DEV_UNCONFIGURED;
- if (TAILQ_EMPTY(&dev->busyq)
- && dev->active == 0
+ if (dev->active == 0
&& (dev->flags & AHD_DEV_TIMER_ACTIVE) == 0)
ahd_linux_free_device(ahd, dev);
}
ahd_midlayer_entrypoint_unlock(ahd, &flags);
}
-#else
-/*
- * Sets the queue depth for each SCSI device hanging
- * off the input host adapter.
- */
-static void
-ahd_linux_select_queue_depth(struct Scsi_Host * host,
- Scsi_Device * scsi_devs)
-{
- Scsi_Device *device;
- Scsi_Device *ldev;
- struct ahd_softc *ahd;
- u_long flags;
-
- ahd = *((struct ahd_softc **)host->hostdata);
- ahd_lock(ahd, &flags);
- for (device = scsi_devs; device != NULL; device = device->next) {
-
- /*
- * 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 ahd_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 = ahd_linux_get_device(ahd, device->channel,
- device->id, device->lun,
- /*alloc*/TRUE);
- if (dev != NULL) {
- dev->flags &= ~AHD_DEV_UNCONFIGURED;
- dev->scsi_device = device;
- ahd_linux_device_queue_depth(ahd, dev);
- device->queue_depth = dev->openings
- + dev->active;
- if ((dev->flags & (AHD_DEV_Q_BASIC
- | AHD_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;
- }
- }
- }
- }
- ahd_unlock(ahd, &flags);
-}
-#endif
#if defined(__i386__)
/*
* Return the disk geometry for the given SCSI device.
*/
static int
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
sector_t capacity, int geom[])
{
uint8_t *bh;
-#else
-ahd_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;
ahd = *((struct ahd_softc **)sdev->host->hostdata);
-#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);
}
{
struct ahd_softc *ahd;
struct ahd_cmd *acmd;
- struct ahd_cmd *list_acmd;
struct ahd_linux_device *dev;
struct scb *pending_scb;
u_long s;
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",
- ahd_name(ahd), cmd->device->channel, cmd->device->id,
- cmd->device->lun);
- TAILQ_REMOVE(&dev->busyq, list_acmd, acmd_links.tqe);
- cmd->result = DID_ABORT << 16;
- ahd_linux_queue_cmd_complete(ahd, cmd);
- retval = SUCCESS;
- goto done;
- }
-
/*
* See if we can find a matching cmd in the pending list.
*/
}
spin_lock_irq(&ahd->platform_data->spin_lock);
}
- ahd_schedule_runq(ahd);
ahd_linux_run_complete_queue(ahd);
ahd_midlayer_entrypoint_unlock(ahd, &s);
return (retval);
retval = FAILED;
}
ahd_lock(ahd, &s);
- ahd_schedule_runq(ahd);
ahd_linux_run_complete_queue(ahd);
ahd_unlock(ahd, &s);
printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
.slave_destroy = ahd_linux_slave_destroy,
};
-/**************************** 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, ahd_schedule_runq() calls this routine
- * directly and ahd_schedule_runq() is called with our lock held.
- */
-static void
-ahd_runq_tasklet(unsigned long data)
-{
- struct ahd_softc* ahd;
- struct ahd_linux_device *dev;
- u_long flags;
-
- ahd = (struct ahd_softc *)data;
- ahd_lock(ahd, &flags);
- while ((dev = ahd_linux_next_device_to_run(ahd)) != NULL) {
-
- TAILQ_REMOVE(&ahd->platform_data->device_runq, dev, links);
- dev->flags &= ~AHD_DEV_ON_RUN_LIST;
- ahd_linux_check_device_queue(ahd, dev);
- /* Yeild to our interrupt handler */
- ahd_unlock(ahd, &flags);
- ahd_lock(ahd, &flags);
- }
- ahd_unlock(ahd, &flags);
-}
-
/******************************** Bus DMA *************************************/
int
ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
*((struct ahd_softc **)host->hostdata) = ahd;
ahd_lock(ahd, &s);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
scsi_assign_lock(host, &ahd->platform_data->spin_lock);
-#elif AHD_SCSI_HAS_HOST_LOCK != 0
- host->lock = &ahd->platform_data->spin_lock;
-#endif
ahd->platform_data->host = host;
host->can_queue = AHD_MAX_QUEUE;
host->cmd_per_lun = 2;
ahd_set_name(ahd, new_name);
}
host->unique_id = ahd->unit;
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
- scsi_set_pci_device(host, ahd->dev_softc);
-#endif
ahd_linux_setup_user_rd_strm_settings(ahd);
ahd_linux_initialize_scsi_bus(ahd);
ahd_unlock(ahd, &s);
ahd_linux_start_dv(ahd);
ahd_unlock(ahd, &s);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
scsi_add_host(host, &ahd->dev_softc->dev); /* XXX handle failure */
scsi_scan_host(host);
-#endif
return (0);
}
return (ENOMEM);
memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
TAILQ_INIT(&ahd->platform_data->completeq);
- TAILQ_INIT(&ahd->platform_data->device_runq);
ahd->platform_data->irq = AHD_LINUX_NOIRQ;
ahd->platform_data->hw_dma_mask = 0xFFFFFFFF;
ahd_lockinit(ahd);
init_MUTEX_LOCKED(&ahd->platform_data->eh_sem);
init_MUTEX_LOCKED(&ahd->platform_data->dv_sem);
init_MUTEX_LOCKED(&ahd->platform_data->dv_cmd_sem);
- ahd_setup_runq_tasklet(ahd);
ahd->seltime = (aic79xx_seltime & 0x3) << 4;
return (0);
}
if (ahd->platform_data != NULL) {
del_timer_sync(&ahd->platform_data->completeq_timer);
ahd_linux_kill_dv_thread(ahd);
- ahd_teardown_runq_tasklet(ahd);
if (ahd->platform_data->host != NULL) {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
scsi_remove_host(ahd->platform_data->host);
-#endif
scsi_host_put(ahd->platform_data->host);
}
release_mem_region(ahd->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 (ahd->dev_softc != NULL)
- ahd->dev_softc->driver = NULL;
-#endif
free(ahd->platform_data, M_DEVBUF);
}
}
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 & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
case AHD_DEV_Q_BASIC:
break;
}
}
-#endif
}
int
ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
int lun, u_int tag, role_t role, uint32_t status)
{
- int targ;
- int maxtarg;
- int maxlun;
- int clun;
- int count;
-
- if (tag != SCB_LIST_NULL)
- return (0);
-
- targ = 0;
- if (target != CAM_TARGET_WILDCARD) {
- targ = target;
- maxtarg = targ + 1;
- } else {
- maxtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
- }
- clun = 0;
- if (lun != CAM_LUN_WILDCARD) {
- clun = lun;
- maxlun = clun + 1;
- } else {
- maxlun = AHD_NUM_LUNS;
- }
-
- count = 0;
- for (; targ < maxtarg; targ++) {
-
- for (; clun < maxlun; clun++) {
- struct ahd_linux_device *dev;
- struct ahd_busyq *busyq;
- struct ahd_cmd *acmd;
-
- dev = ahd_linux_get_device(ahd, /*chan*/0, 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;
- ahd_linux_queue_cmd_complete(ahd, cmd);
- }
- }
- }
-
- return (count);
+ return 0;
}
static void
* Complete thread creation.
*/
lock_kernel();
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,60)
- /*
- * Don't care about any signals.
- */
- siginitsetinv(¤t->blocked, 0);
- daemonize();
- sprintf(current->comm, "ahd_dv_%d", ahd->unit);
-#else
daemonize("ahd_dv_%d", ahd->unit);
- current->flags |= PF_NOFREEZE;
-#endif
+ current->flags |= PF_FREEZE;
+
unlock_kernel();
while (1) {
ahd->platform_data->reset_timer.function =
(ahd_linux_callback_t *)ahd_release_simq;
add_timer(&ahd->platform_data->reset_timer);
- if (ahd_linux_next_device_to_run(ahd) != NULL)
- ahd_schedule_runq(ahd);
ahd_linux_run_complete_queue(ahd);
ahd_unlock(ahd, &flags);
}
}
}
-static void
-ahd_linux_run_device_queue(struct ahd_softc *ahd, struct ahd_linux_device *dev)
+static int
+ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
+ struct scsi_cmnd *cmd)
{
- struct ahd_cmd *acmd;
- struct scsi_cmnd *cmd;
struct scb *scb;
struct hardware_scb *hscb;
struct ahd_initiator_tinfo *tinfo;
u_int col_idx;
uint16_t mask;
- if ((dev->flags & AHD_DEV_ON_RUN_LIST) != 0)
- panic("running device on run list");
-
- while ((acmd = TAILQ_FIRST(&dev->busyq)) != NULL
- && dev->openings > 0 && dev->qfrozen == 0) {
-
- /*
- * Schedule us to run later. The only reason we are not
- * running is because the whole controller Q is frozen.
- */
- if (ahd->platform_data->qfrozen != 0
- && AHD_DV_SIMQ_FROZEN(ahd) == 0) {
-
- TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq,
- dev, links);
- dev->flags |= AHD_DEV_ON_RUN_LIST;
- return;
- }
+ /*
+ * Get an scb to use.
+ */
+ tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
+ cmd->device->id, &tstate);
+ if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
+ || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
+ col_idx = AHD_NEVER_COL_IDX;
+ } else {
+ col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
+ cmd->device->lun);
+ }
+ if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
+ ahd->flags |= AHD_RESOURCE_SHORTAGE;
+ return SCSI_MLQUEUE_HOST_BUSY;
+ }
- cmd = &acmd_scsi_cmd(acmd);
+ scb->io_ctx = cmd;
+ scb->platform_data->dev = dev;
+ hscb = scb->hscb;
+ cmd->host_scribble = (char *)scb;
- /*
- * Get an scb to use.
- */
- tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
- cmd->device->id, &tstate);
- if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
- || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
- col_idx = AHD_NEVER_COL_IDX;
- } else {
- col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
- cmd->device->lun);
- }
- if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
- TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq,
- dev, links);
- dev->flags |= AHD_DEV_ON_RUN_LIST;
- ahd->flags |= AHD_RESOURCE_SHORTAGE;
- return;
- }
- TAILQ_REMOVE(&dev->busyq, acmd, acmd_links.tqe);
- scb->io_ctx = cmd;
- scb->platform_data->dev = dev;
- hscb = scb->hscb;
- cmd->host_scribble = (char *)scb;
+ /*
+ * Fill out basics of the HSCB.
+ */
+ hscb->control = 0;
+ hscb->scsiid = BUILD_SCSIID(ahd, cmd);
+ hscb->lun = cmd->device->lun;
+ scb->hscb->task_management = 0;
+ mask = SCB_GET_TARGET_MASK(ahd, scb);
- /*
- * Fill out basics of the HSCB.
- */
- hscb->control = 0;
- hscb->scsiid = BUILD_SCSIID(ahd, cmd);
- hscb->lun = cmd->device->lun;
- scb->hscb->task_management = 0;
- mask = SCB_GET_TARGET_MASK(ahd, scb);
+ if ((ahd->user_discenable & mask) != 0)
+ hscb->control |= DISCENB;
- if ((ahd->user_discenable & mask) != 0)
- hscb->control |= DISCENB;
+ if (AHD_DV_CMD(cmd) != 0)
+ scb->flags |= SCB_SILENT;
- if (AHD_DV_CMD(cmd) != 0)
- scb->flags |= SCB_SILENT;
+ if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
+ scb->flags |= SCB_PACKETIZED;
- if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
- scb->flags |= SCB_PACKETIZED;
+ if ((tstate->auto_negotiate & mask) != 0) {
+ scb->flags |= SCB_AUTO_NEGOTIATE;
+ scb->hscb->control |= MK_MESSAGE;
+ }
- if ((tstate->auto_negotiate & mask) != 0) {
- scb->flags |= SCB_AUTO_NEGOTIATE;
- scb->hscb->control |= MK_MESSAGE;
- }
+ if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
+ int msg_bytes;
+ uint8_t tag_msgs[2];
- if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
- 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
-#endif
- if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
- && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
- hscb->control |= MSG_ORDERED_TASK;
+ 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;
- }
+ } else
+ if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
+ && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
+ hscb->control |= MSG_ORDERED_TASK;
+ dev->commands_since_idle_or_otag = 0;
+ } else {
+ hscb->control |= MSG_SIMPLE_TASK;
}
+ }
- hscb->cdb_len = cmd->cmd_len;
- memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
-
- scb->sg_count = 0;
- ahd_set_residual(scb, 0);
- ahd_set_sense_residual(scb, 0);
- if (cmd->use_sg != 0) {
- void *sg;
- struct scatterlist *cur_seg;
- u_int nseg;
- int dir;
-
- cur_seg = (struct scatterlist *)cmd->request_buffer;
- dir = cmd->sc_data_direction;
- nseg = pci_map_sg(ahd->dev_softc, cur_seg,
- cmd->use_sg, dir);
- scb->platform_data->xfer_len = 0;
- for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
- dma_addr_t addr;
- bus_size_t len;
-
- addr = sg_dma_address(cur_seg);
- len = sg_dma_len(cur_seg);
- scb->platform_data->xfer_len += len;
- sg = ahd_sg_setup(ahd, scb, sg, addr, len,
- /*last*/nseg == 1);
- }
- } else if (cmd->request_bufflen != 0) {
- void *sg;
+ hscb->cdb_len = cmd->cmd_len;
+ memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
+
+ scb->sg_count = 0;
+ ahd_set_residual(scb, 0);
+ ahd_set_sense_residual(scb, 0);
+ if (cmd->use_sg != 0) {
+ void *sg;
+ struct scatterlist *cur_seg;
+ u_int nseg;
+ int dir;
+
+ cur_seg = (struct scatterlist *)cmd->request_buffer;
+ dir = cmd->sc_data_direction;
+ nseg = pci_map_sg(ahd->dev_softc, cur_seg,
+ cmd->use_sg, dir);
+ scb->platform_data->xfer_len = 0;
+ for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
dma_addr_t addr;
- int dir;
-
- sg = scb->sg_list;
- dir = cmd->sc_data_direction;
- addr = pci_map_single(ahd->dev_softc,
- cmd->request_buffer,
- cmd->request_bufflen, dir);
- scb->platform_data->xfer_len = cmd->request_bufflen;
- scb->platform_data->buf_busaddr = addr;
- sg = ahd_sg_setup(ahd, scb, sg, addr,
- cmd->request_bufflen, /*last*/TRUE);
- }
+ bus_size_t len;
- LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
- dev->openings--;
- dev->active++;
- dev->commands_issued++;
-
- /* Update the error counting bucket and dump if needed */
- if (dev->target->cmds_since_error) {
- dev->target->cmds_since_error++;
- if (dev->target->cmds_since_error >
- AHD_LINUX_ERR_THRESH)
- dev->target->cmds_since_error = 0;
+ addr = sg_dma_address(cur_seg);
+ len = sg_dma_len(cur_seg);
+ scb->platform_data->xfer_len += len;
+ sg = ahd_sg_setup(ahd, scb, sg, addr, len,
+ /*last*/nseg == 1);
}
+ } else if (cmd->request_bufflen != 0) {
+ void *sg;
+ dma_addr_t addr;
+ int dir;
+
+ sg = scb->sg_list;
+ dir = cmd->sc_data_direction;
+ addr = pci_map_single(ahd->dev_softc,
+ cmd->request_buffer,
+ cmd->request_bufflen, dir);
+ scb->platform_data->xfer_len = cmd->request_bufflen;
+ scb->platform_data->buf_busaddr = addr;
+ sg = ahd_sg_setup(ahd, scb, sg, addr,
+ cmd->request_bufflen, /*last*/TRUE);
+ }
- if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
- dev->commands_since_idle_or_otag++;
- scb->flags |= SCB_ACTIVE;
- ahd_queue_scb(ahd, scb);
+ LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
+ dev->openings--;
+ dev->active++;
+ dev->commands_issued++;
+
+ /* Update the error counting bucket and dump if needed */
+ if (dev->target->cmds_since_error) {
+ dev->target->cmds_since_error++;
+ if (dev->target->cmds_since_error >
+ AHD_LINUX_ERR_THRESH)
+ dev->target->cmds_since_error = 0;
}
+
+ if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
+ dev->commands_since_idle_or_otag++;
+ scb->flags |= SCB_ACTIVE;
+ ahd_queue_scb(ahd, scb);
+
+ return 0;
}
/*
ahd = (struct ahd_softc *) dev_id;
ahd_lock(ahd, &flags);
ours = ahd_intr(ahd);
- if (ahd_linux_next_device_to_run(ahd) != NULL)
- ahd_schedule_runq(ahd);
ahd_linux_run_complete_queue(ahd);
ahd_unlock(ahd, &flags);
return IRQ_RETVAL(ours);
return (NULL);
memset(dev, 0, sizeof(*dev));
init_timer(&dev->timer);
- TAILQ_INIT(&dev->busyq);
dev->flags = AHD_DEV_UNCONFIGURED;
dev->lun = lun;
dev->target = targ;
}
case AC_SENT_BDR:
{
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
WARN_ON(lun != CAM_LUN_WILDCARD);
scsi_report_device_reset(ahd->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 = ahd->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:
if (dev->active == 0)
dev->commands_since_idle_or_otag = 0;
- if (TAILQ_EMPTY(&dev->busyq)) {
- if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0
- && dev->active == 0
- && (dev->flags & AHD_DEV_TIMER_ACTIVE) == 0)
- ahd_linux_free_device(ahd, dev);
- } else if ((dev->flags & AHD_DEV_ON_RUN_LIST) == 0) {
- TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq, dev, links);
- dev->flags |= AHD_DEV_ON_RUN_LIST;
- }
+ if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0
+ && dev->active == 0
+ && (dev->flags & AHD_DEV_TIMER_ACTIVE) == 0)
+ ahd_linux_free_device(ahd, dev);
if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
printf("Recovery SCB completes\n");
ahd->platform_data->flags &= ~AHD_DV_WAIT_SIMQ_RELEASE;
up(&ahd->platform_data->dv_sem);
}
- ahd_schedule_runq(ahd);
ahd_unlock(ahd, &s);
/*
* There is still a race here. The mid-layer
dev->flags &= ~AHD_DEV_TIMER_ACTIVE;
if (dev->qfrozen > 0)
dev->qfrozen--;
- if (dev->qfrozen == 0
- && (dev->flags & AHD_DEV_ON_RUN_LIST) == 0)
- ahd_linux_run_device_queue(ahd, dev);
if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0
&& dev->active == 0)
ahd_linux_free_device(ahd, dev);
ahd_unlock(ahd, &s);
}
-void
-ahd_platform_dump_card_state(struct ahd_softc *ahd)
-{
- struct ahd_linux_device *dev;
- int target;
- int maxtarget;
- int lun;
- int i;
-
- maxtarget = (ahd->features & AHD_WIDE) ? 15 : 7;
- for (target = 0; target <=maxtarget; target++) {
-
- for (lun = 0; lun < AHD_NUM_LUNS; lun++) {
- struct ahd_cmd *acmd;
-
- dev = ahd_linux_get_device(ahd, 0, target,
- lun, /*alloc*/FALSE);
- if (dev == NULL)
- continue;
-
- printf("DevQ(%d:%d:%d): ", 0, target, lun);
- i = 0;
- TAILQ_FOREACH(acmd, &dev->busyq, acmd_links.tqe) {
- if (i++ > AHD_SCB_MAX)
- break;
- }
- printf("%d waiting\n", i);
- }
- }
-}
-
static int __init
ahd_linux_init(void)
{
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
return ahd_linux_detect(&aic79xx_driver_template);
-#else
- scsi_register_module(MODULE_SCSI_HA, &aic79xx_driver_template);
- if (aic79xx_driver_template.present == 0) {
- scsi_unregister_module(MODULE_SCSI_HA,
- &aic79xx_driver_template);
- return (-ENODEV);
- }
-
- return (0);
-#endif
}
static void __exit
ahd_linux_kill_dv_thread(ahd);
}
-#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, &aic79xx_driver_template);
-#endif
ahd_linux_pci_exit();
}
projects / openwrt / staging / blogic.git / commitdiff