#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 */
*/
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.
static void ahc_linux_dev_timed_unfreeze(u_long arg);
static int ahc_linux_queue_recovery_cmd(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);
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;
cmd->scsi_done(cmd);
}
- ahc_done_unlock(ahc, &done_flags);
return (acmd);
}
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 *);
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.
*/
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
printf("ahc_linux_detect: Unable to attach\n");
return (0);
}
- ahc_linux_size_nseg();
/*
* If we've been passed any parameters, process them now.
*/
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.
*/
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)
{
{
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
dev->scsi_device = device;
ahc_linux_device_queue_depth(ahc, dev);
}
- ahc_midlayer_entrypoint_unlock(ahc, &flags);
/* Initial Domain Validation */
if (!spi_initial_dv(device->sdev_target))
{
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);
&& (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;
-
- ahc = *((struct ahc_softc **)host->hostdata);
- ahc_lock(ahc, &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 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);
-}
-#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;
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);
}
ahc_linux_bus_reset(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. "
*((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;
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);
}
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 =
if (ahc->platform_data != NULL) {
del_timer_sync(&ahc->platform_data->completeq_timer);
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);
}
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);
}
}
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:
break;
}
}
-#endif
}
int
}
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];
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) {
+ } 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 {
}
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:
struct ahc_softc *ahc;
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;
printf(" 0x%x", cmd->cmnd[cdb_byte]);
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
spin_lock_irq(&ahc->platform_data->spin_lock);
}
ahc_linux_run_complete_queue(ahc);
- ahc_midlayer_entrypoint_unlock(ahc, &s);
return (retval);
}
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;
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);
/***************************** SMP support ************************************/
#include <linux/spinlock.h>
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) || defined(SCSI_HAS_HOST_LOCK))
-#define AHC_SCSI_HAS_HOST_LOCK 1
-#else
-#define AHC_SCSI_HAS_HOST_LOCK 0
-#endif
-
#define AIC7XXX_DRIVER_VERSION "6.2.36"
/**************************** Front End Queues ********************************/
* manner and are allocated below 4GB, the number of S/G segments is
* unrestricted.
*/
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
-/*
- * We dynamically adjust the number of segments in pre-2.5 kernels to
- * avoid fragmentation issues in the SCSI mid-layer's private memory
- * allocator. See aic7xxx_osm.c ahc_linux_size_nseg() for details.
- */
-extern u_int ahc_linux_nseg;
-#define AHC_NSEG ahc_linux_nseg
-#define AHC_LINUX_MIN_NSEG 64
-#else
#define AHC_NSEG 128
-#endif
/*
* Per-SCB OSM storage.
static __inline void ahc_lock(struct ahc_softc *, unsigned long *flags);
static __inline void ahc_unlock(struct ahc_softc *, unsigned long *flags);
-/* Lock acquisition and release of the above lock in midlayer entry points. */
-static __inline void ahc_midlayer_entrypoint_lock(struct ahc_softc *,
- unsigned long *flags);
-static __inline void ahc_midlayer_entrypoint_unlock(struct ahc_softc *,
- unsigned long *flags);
-
-/* Lock held during command compeletion to the upper layer */
-static __inline void ahc_done_lockinit(struct ahc_softc *);
-static __inline void ahc_done_lock(struct ahc_softc *, unsigned long *flags);
-static __inline void ahc_done_unlock(struct ahc_softc *, unsigned long *flags);
-
/* Lock held during ahc_list manipulation and ahc softc frees */
extern spinlock_t ahc_list_spinlock;
static __inline void ahc_list_lockinit(void);
spin_unlock_irqrestore(&ahc->platform_data->spin_lock, *flags);
}
-static __inline void
-ahc_midlayer_entrypoint_lock(struct ahc_softc *ahc, unsigned long *flags)
-{
- /*
- * In 2.5.X and some 2.4.X versions, the midlayer takes our
- * lock just before calling us, so we avoid locking again.
- * For other kernel versions, the io_request_lock is taken
- * just before our entry point is called. In this case, we
- * trade the io_request_lock for our per-softc lock.
- */
-#if AHC_SCSI_HAS_HOST_LOCK == 0
- spin_unlock(&io_request_lock);
- spin_lock(&ahc->platform_data->spin_lock);
-#endif
-}
-
-static __inline void
-ahc_midlayer_entrypoint_unlock(struct ahc_softc *ahc, unsigned long *flags)
-{
-#if AHC_SCSI_HAS_HOST_LOCK == 0
- spin_unlock(&ahc->platform_data->spin_lock);
- spin_lock(&io_request_lock);
-#endif
-}
-
-static __inline void
-ahc_done_lockinit(struct ahc_softc *ahc)
-{
- /*
- * In 2.5.X, our own lock is held during completions.
- * In previous versions, the io_request_lock is used.
- * In either case, we can't initialize this lock again.
- */
-}
-
-static __inline void
-ahc_done_lock(struct ahc_softc *ahc, unsigned long *flags)
-{
-#if AHC_SCSI_HAS_HOST_LOCK == 0
- spin_lock_irqsave(&io_request_lock, *flags);
-#endif
-}
-
-static __inline void
-ahc_done_unlock(struct ahc_softc *ahc, unsigned long *flags)
-{
-#if AHC_SCSI_HAS_HOST_LOCK == 0
- spin_unlock_irqrestore(&io_request_lock, *flags);
-#endif
-}
-
static __inline void
ahc_list_lockinit(void)
{
} ahc_power_state;
/**************************** VL/EISA Routines ********************************/
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) \
- && (defined(__i386__) || defined(__alpha__)) \
- && (!defined(CONFIG_EISA)))
-#define CONFIG_EISA
-#endif
-
#ifdef CONFIG_EISA
extern uint32_t aic7xxx_probe_eisa_vl;
int ahc_linux_eisa_init(void);
}
/**************************** Proc FS Support *********************************/
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
-int ahc_linux_proc_info(char *, char **, off_t, int, int, int);
-#else
int ahc_linux_proc_info(struct Scsi_Host *, char *, char **,
off_t, int, int);
-#endif
/*************************** Domain Validation ********************************/
/*********************** Transaction Access Wrappers *************************/
projects / linux-2.6 / commitdiff