int timeout_jiffies);
static void sata_oxnas_release_hw(struct ata_port *ap);
-static const void *HW_LOCKER_UID = (void*)0xdeadbeef;
+static const void *HW_LOCKER_UID = (void *)0xdeadbeef;
/***************************************************************************
* ASIC access
void __iomem *port_base = pd->port_base;
void __iomem *core_base = pd->core_base;
int port_no = qc->ap->port_no;
- int no_microcode = ( hd->current_ucode == UNKNOWN_MODE );
+ int no_microcode = (hd->current_ucode == UNKNOWN_MODE);
u32 reg;
/* check the core is idle */
/* enable passing of error signals to DMA sub-core by clearing the
* appropriate bit */
reg = ioread32(core_base + DATA_PLANE_CTRL);
- if(no_microcode)
+ if (no_microcode)
reg |= (DPC_ERROR_MASK_BIT | (DPC_ERROR_MASK_BIT << 1));
reg &= ~(DPC_ERROR_MASK_BIT << port_no);
iowrite32(reg, core_base + DATA_PLANE_CTRL);
spin_lock_irqsave(&hd->core_lock, flags);
- DPRINTK("Entered uid %p, port %d, h/w count %d, d count %d, callback %p, "
- "hw_access %d, core_locked %d, reentrant_port_no %d, isr_callback %p\n",
- uid, port_no, hd->hw_lock_count, hd->direct_lock_count, callback, hw_access,
- hd->core_locked, hd->reentrant_port_no, hd->isr_callback);
+ DPRINTK("Entered uid %p, port %d, h/w count %d, d count %d, "
+ "callback %p, hw_access %d, core_locked %d, "
+ "reentrant_port_no %d, isr_callback %p\n",
+ uid, port_no, hd->hw_lock_count, hd->direct_lock_count,
+ callback, hw_access, hd->core_locked, hd->reentrant_port_no,
+ hd->isr_callback);
while (!timed_out) {
- if (hd->core_locked || (!hw_access && hd->scsi_nonblocking_attempts)) {
+ if (hd->core_locked ||
+ (!hw_access && hd->scsi_nonblocking_attempts)) {
/* Can only allow access if from SCSI/SATA stack and if
- reentrant access is allowed and this access is to the same
- port for which the lock is current held */
+ * reentrant access is allowed and this access is to the
+ * same port for which the lock is current held
+ */
if (hw_access && (port_no == hd->reentrant_port_no)) {
BUG_ON(!hd->hw_lock_count);
++(hd->hw_lock_count);
- DPRINTK("Allow SCSI/SATA re-entrant access to uid %p port %d\n", uid, port_no);
+ DPRINTK("Allow SCSI/SATA re-entrant access to "
+ "uid %p port %d\n", uid, port_no);
acquired = 1;
break;
} else if (!hw_access) {
- if ((locker_type == SATA_READER) && (hd->current_locker_type == SATA_READER)) {
+ if ((locker_type == SATA_READER) &&
+ (hd->current_locker_type == SATA_READER)) {
WARN(1,
- "Already locked by reader, uid %p, locker_uid %p, port %d, "
- "h/w count %d, d count %d, hw_access %d\n", uid, hd->locker_uid,
- port_no, hd->hw_lock_count, hd->direct_lock_count, hw_access);
+ "Already locked by reader, "
+ "uid %p, locker_uid %p, "
+ "port %d, h/w count %d, "
+ "d count %d, hw_access %d\n",
+ uid, hd->locker_uid, port_no,
+ hd->hw_lock_count,
+ hd->direct_lock_count,
+ hw_access);
goto check_uid;
}
- if ((locker_type != SATA_READER) && (locker_type != SATA_WRITER)) {
+ if ((locker_type != SATA_READER) &&
+ (locker_type != SATA_WRITER)) {
goto wait_for_lock;
}
check_uid:
- WARN(uid == hd->locker_uid, "Attempt to lock by locker type %d "
- "uid %p, already locked by locker type %d with "
- "locker_uid %p, port %d, h/w count %d, d count %d, "
- "hw_access %d\n", locker_type, uid, hd->current_locker_type,
- hd->locker_uid, port_no, hd->hw_lock_count, hd->direct_lock_count, hw_access);
+ WARN(uid == hd->locker_uid, "Attempt to lock "
+ "by locker type %d uid %p, already "
+ "locked by locker type %d with "
+ "locker_uid %p, port %d, "
+ "h/w count %d, d count %d, "
+ "hw_access %d\n", locker_type, uid,
+ hd->current_locker_type,
+ hd->locker_uid, port_no,
+ hd->hw_lock_count,
+ hd->direct_lock_count, hw_access);
}
} else {
- WARN(hd->hw_lock_count || hd->direct_lock_count, "Core unlocked but counts "
- "non-zero: uid %p, locker_uid %p, port %d, h/w count %d, "
- "d count %d, hw_access %d\n", uid, hd->locker_uid, port_no,
- hd->hw_lock_count, hd->direct_lock_count, hw_access);
+ WARN(hd->hw_lock_count || hd->direct_lock_count,
+ "Core unlocked but counts non-zero: uid %p, "
+ "locker_uid %p, port %d, h/w count %d, "
+ "d count %d, hw_access %d\n", uid,
+ hd->locker_uid, port_no, hd->hw_lock_count,
+ hd->direct_lock_count, hw_access);
BUG_ON(hd->current_locker_type != SATA_UNLOCKED);
- WARN(hd->locker_uid, "Attempt to lock uid %p when locker_uid %p is "
- "non-zero, port %d, h/w count %d, d count %d, hw_access %d\n",
- uid, hd->locker_uid, port_no, hd->hw_lock_count, hd->direct_lock_count,
- hw_access);
+ WARN(hd->locker_uid, "Attempt to lock uid %p when "
+ "locker_uid %p is non-zero, port %d, "
+ "h/w count %d, d count %d, hw_access %d\n",
+ uid, hd->locker_uid, port_no, hd->hw_lock_count,
+ hd->direct_lock_count, hw_access);
if (!hw_access) {
- /* Direct access attempting to acquire non-contented lock */
- BUG_ON(!callback); // Must have callback for direct access
- BUG_ON(hd->reentrant_port_no != -1); // Sanity check lock state
+ /* Direct access attempting to acquire
+ * non-contented lock
+ */
+ /* Must have callback for direct access */
+ BUG_ON(!callback);
+ /* Sanity check lock state */
+ BUG_ON(hd->reentrant_port_no != -1);
hd->isr_callback = callback;
hd->isr_arg = arg;
hd->current_locker_type = locker_type;
} else {
- /* SCSI/SATA attempting to acquire non-contented lock */
- BUG_ON(callback); // No callbacks for SCSI/SATA access
- BUG_ON(arg); // No callback args for SCSI/SATA access
-
- BUG_ON(hd->isr_callback); // Sanity check lock state
- BUG_ON(hd->isr_arg); // Sanity check lock state
+ /* SCSI/SATA attempting to acquire
+ * non-contented lock
+ */
+ /* No callbacks for SCSI/SATA access */
+ BUG_ON(callback);
+ /* No callback args for SCSI/SATA access */
+ BUG_ON(arg);
+
+ /* Sanity check lock state */
+ BUG_ON(hd->isr_callback);
+ BUG_ON(hd->isr_arg);
++(hd->hw_lock_count);
hd->reentrant_port_no = port_no;
wait_for_lock:
if (!may_sleep) {
- DPRINTK("Denying for uid %p locker_type %d, hw_access %d, port %d, "
- "current_locker_type %d as cannot sleep\n", uid, locker_type,
- hw_access, port_no, hd->current_locker_type);
+ DPRINTK("Denying for uid %p locker_type %d, "
+ "hw_access %d, port %d, current_locker_type %d as "
+ "cannot sleep\n", uid, locker_type, hw_access, port_no,
+ hd->current_locker_type);
- if (hw_access) {
+ if (hw_access)
++(hd->scsi_nonblocking_attempts);
- }
+
break;
}
- // Core is locked and we're allowed to sleep, so wait to be awoken when
- // the core is unlocked
+ /* Core is locked and we're allowed to sleep, so wait to be
+ * awoken when the core is unlocked
+ */
for (;;) {
- prepare_to_wait(hw_access ? &hd->scsi_wait_queue : &hd->fast_wait_queue,
- &wait, TASK_UNINTERRUPTIBLE);
- if (!hd->core_locked && !(!hw_access && hd->scsi_nonblocking_attempts)) {
- // We're going to use variables that will have been changed by
- // the waker prior to clearing core_locked so we need to ensure
- // we see changes to all those variables
+ prepare_to_wait(hw_access ? &hd->scsi_wait_queue :
+ &hd->fast_wait_queue,
+ &wait, TASK_UNINTERRUPTIBLE);
+ if (!hd->core_locked &&
+ !(!hw_access && hd->scsi_nonblocking_attempts)) {
+ /* We're going to use variables that will have
+ * been changed by the waker prior to clearing
+ * core_locked so we need to ensure we see
+ * changes to all those variables
+ */
smp_rmb();
break;
}
if (time_after(jiffies, end)) {
- printk("__acquire_sata_core() uid %p failing for port %d timed out, "
- "locker_uid %p, h/w count %d, d count %d, callback %p, hw_access %d, "
- "core_locked %d, reentrant_port_no %d, isr_callback %p, "
- "isr_arg %p\n", uid, port_no, hd->locker_uid,
- hd->hw_lock_count, hd->direct_lock_count, callback, hw_access,
- hd->core_locked, hd->reentrant_port_no, hd->isr_callback,
- hd->isr_arg);
+ printk(KERN_WARNING "__acquire_sata_core() "
+ "uid %p failing for port %d timed out, "
+ "locker_uid %p, h/w count %d, "
+ "d count %d, callback %p, hw_access %d, "
+ "core_locked %d, reentrant_port_no %d, "
+ "isr_callback %p, isr_arg %p\n", uid,
+ port_no, hd->locker_uid,
+ hd->hw_lock_count,
+ hd->direct_lock_count, callback,
+ hw_access, hd->core_locked,
+ hd->reentrant_port_no, hd->isr_callback,
+ hd->isr_arg);
timed_out = 1;
break;
}
spin_unlock_irqrestore(&hd->core_lock, flags);
if (!schedule_timeout(4*HZ)) {
- printk(KERN_INFO "__acquire_sata_core() uid %p, locker_uid %p, "
- "timed-out of schedule(), checking overall timeout\n",
+ printk(KERN_INFO "__acquire_sata_core() uid %p, "
+ "locker_uid %p, timed-out of "
+ "schedule(), checking overall timeout\n",
uid, hd->locker_uid);
}
spin_lock_irqsave(&hd->core_lock, flags);
}
- finish_wait(hw_access ? &hd->scsi_wait_queue : &hd->fast_wait_queue, &wait);
+ finish_wait(hw_access ? &hd->scsi_wait_queue :
+ &hd->fast_wait_queue, &wait);
}
if (hw_access && acquired) {
- if (hd->scsi_nonblocking_attempts) {
+ if (hd->scsi_nonblocking_attempts)
hd->scsi_nonblocking_attempts = 0;
- }
- // Wake any other SCSI/SATA waiters so they can get reentrant access to
- // the same port if appropriate. This is because if the SATA core is
- // locked by fast access, or SCSI/SATA access to other port, then can
- // have >1 SCSI/SATA waiters on the wait list so want to give reentrant
- // accessors a chance to get access ASAP
- if (!list_empty(&hd->scsi_wait_queue.task_list)) {
+ /* Wake any other SCSI/SATA waiters so they can get reentrant
+ * access to the same port if appropriate. This is because if
+ * the SATA core is locked by fast access, or SCSI/SATA access
+ * to other port, then can have >1 SCSI/SATA waiters on the wait
+ * list so want to give reentrant accessors a chance to get
+ * access ASAP
+ */
+ if (!list_empty(&hd->scsi_wait_queue.task_list))
wake_up(&hd->scsi_wait_queue);
- }
}
- DPRINTK("Leaving uid %p with acquired = %d, port %d, callback %p\n", uid, acquired, port_no, callback);
+ DPRINTK("Leaving uid %p with acquired = %d, port %d, callback %p\n",
+ uid, acquired, port_no, callback);
spin_unlock_irqrestore(&hd->core_lock, flags);
struct sata_oxnas_host_priv *hd = ah->private_data;
spin_lock_irqsave(&hd->core_lock, flags);
- has_waiters = hd->scsi_nonblocking_attempts || !list_empty(&hd->scsi_wait_queue.task_list);
+ has_waiters = hd->scsi_nonblocking_attempts ||
+ !list_empty(&hd->scsi_wait_queue.task_list);
spin_unlock_irqrestore(&hd->core_lock, flags);
return has_waiters;
int may_sleep,
int timeout_jiffies)
{
- return __acquire_sata_core(ap->host, ap->port_no, NULL, 0, may_sleep, timeout_jiffies, 1, (void*)HW_LOCKER_UID, SATA_SCSI_STACK);
+ return __acquire_sata_core(ap->host, ap->port_no, NULL, 0, may_sleep,
+ timeout_jiffies, 1, (void *)HW_LOCKER_UID,
+ SATA_SCSI_STACK);
}
/*
spin_lock_irqsave(&hd->core_lock, flags);
- DPRINTK("Entered port_no = %d, h/w count %d, d count %d, core locked = %d, "
- "reentrant_port_no = %d, isr_callback %p\n", ap->port_no,
- hd->hw_lock_count, hd->direct_lock_count, hd->core_locked, hd->reentrant_port_no, hd->isr_callback);
+ DPRINTK("Entered port_no = %d, h/w count %d, d count %d, "
+ "core locked = %d, reentrant_port_no = %d, isr_callback %p\n",
+ ap->port_no, hd->hw_lock_count, hd->direct_lock_count,
+ hd->core_locked, hd->reentrant_port_no, hd->isr_callback);
if (!hd->core_locked) {
/* Nobody holds the SATA lock */
- printk(KERN_WARNING "Nobody holds SATA lock, port_no %d\n", ap->port_no);
+ printk(KERN_WARNING "Nobody holds SATA lock, port_no %d\n",
+ ap->port_no);
released = 1;
} else if (!hd->hw_lock_count) {
/* SCSI/SATA has released without holding the lock */
- printk(KERN_WARNING "SCSI/SATA does not hold SATA lock, port_no %d\n", ap->port_no);
+ printk(KERN_WARNING "SCSI/SATA does not hold SATA lock, "
+ "port_no %d\n", ap->port_no);
} else {
/* Trap incorrect usage */
BUG_ON(hd->reentrant_port_no == -1);
BUG_ON(hd->direct_lock_count);
BUG_ON(hd->current_locker_type != SATA_SCSI_STACK);
- WARN(!hd->locker_uid || (hd->locker_uid != HW_LOCKER_UID), "Invalid locker "
- "uid %p, h/w count %d, d count %d, reentrant_port_no %d, "
- "core_locked %d, isr_callback %p\n", hd->locker_uid,
- hd->hw_lock_count, hd->direct_lock_count, hd->reentrant_port_no,
+ WARN(!hd->locker_uid || (hd->locker_uid != HW_LOCKER_UID),
+ "Invalid locker uid %p, h/w count %d, d count %d, "
+ "reentrant_port_no %d, core_locked %d, "
+ "isr_callback %p\n", hd->locker_uid, hd->hw_lock_count,
+ hd->direct_lock_count, hd->reentrant_port_no,
hd->core_locked, hd->isr_callback);
if (--(hd->hw_lock_count)) {
hd->locker_uid = 0;
hd->core_locked = 0;
released = 1;
- wake_up(!list_empty(&hd->scsi_wait_queue.task_list) ? &hd->scsi_wait_queue : &hd->fast_wait_queue);
+ wake_up(!list_empty(&hd->scsi_wait_queue.task_list) ?
+ &hd->scsi_wait_queue :
+ &hd->fast_wait_queue);
}
}
- DPRINTK("Leaving, port_no %d, count %d\n", ap->port_no, hd->hw_lock_count);
+ DPRINTK("Leaving, port_no %d, count %d\n", ap->port_no,
+ hd->hw_lock_count);
spin_unlock_irqrestore(&hd->core_lock, flags);
return (ioread32(hd->port_base + SATA_COMMAND) & CMD_CORE_BUSY) ||
(hd->n_ports > 1 &&
- (ioread32(hd->port_base + PORT_SIZE + SATA_COMMAND) & CMD_CORE_BUSY));
+ (ioread32(hd->port_base + PORT_SIZE + SATA_COMMAND) &
+ CMD_CORE_BUSY));
}
static inline u32 sata_oxnas_hostdmabusy(struct ata_port *ap)
udelay(50);
workaround5458(ah);
- /* tune for sata compatability */
+ /* tune for sata compatibility */
sata_oxnas_link_write(ah->ports[0], 0x60, 0x2988);
- for (n=0; n < host_priv->n_ports; n++) {
+ for (n = 0; n < host_priv->n_ports; n++) {
/* each port in turn */
sata_oxnas_link_write(ah->ports[n], 0x70, 0x55629);
}
static inline void sata_oxnas_reset_sgdma(struct ata_port *ap)
{
struct sata_oxnas_port_priv *pd = ap->private_data;
+
iowrite32(SGDMA_RESETS_CTRL, pd->sgdma_base + SGDMA_RESETS);
}
DPRINTK("ENTER\n");
if (reg & INT_REG_ACCESS_ERR) {
- printk(KERN_INFO "clearing register access error on port %d\n", ap->port_no);
+ DPRINTK("clearing register access error on port %d\n",
+ ap->port_no);
iowrite32(INT_REG_ACCESS_ERR, base + INT_STATUS);
}
reg = ioread32(base + INT_STATUS);
if (reg & INT_REG_ACCESS_ERR)
- printk(KERN_INFO "register access error didn't clear\n");
+ DPRINTK("register access error didn't clear\n");
}
static inline void sata_oxnas_clear_sctl_error(struct ata_port *ap)
struct sata_oxnas_host_priv *hd = ah->private_data;
int actions_required = 0;
int n;
- printk(KERN_INFO "sata_oxnas: reseting SATA core\n");
+
+ printk(KERN_INFO "sata_oxnas: resetting SATA core\n");
/* core not recovering, reset it */
mdelay(5);
sata_oxnas_reset_core(ah);
/* Perform any SATA core re-initialisation after reset post reset init
* needs to be called for both ports as there's one reset for both
* ports */
- for (n=0; n < hd->n_ports; n++)
+ for (n = 0; n < hd->n_ports; n++)
sata_oxnas_post_reset_init(ah->ports[n]);
static int sata_oxnas_qc_new(struct ata_port *ap)
{
struct sata_oxnas_host_priv *hd = ap->host->private_data;
+
DPRINTK("port %d\n", ap->port_no);
smp_rmb();
if (hd->port_frozen || hd->port_in_eh)
sata_oxnas_release_hw(qc->ap);
}
-static void sata_oxnas_freeze(struct ata_port* ap)
+static void sata_oxnas_freeze(struct ata_port *ap)
{
struct sata_oxnas_host_priv *hd = ap->host->private_data;
+
DPRINTK("\n");
hd->port_frozen |= BIT(ap->port_no);
smp_wmb();
}
-static void sata_oxnas_thaw(struct ata_port* ap)
+static void sata_oxnas_thaw(struct ata_port *ap)
{
struct sata_oxnas_host_priv *hd = ap->host->private_data;
+
DPRINTK("\n");
hd->port_frozen &= ~BIT(ap->port_no);
smp_wmb();
return status;
}
-static inline void sata_oxnas_reset_ucode(struct ata_host *ah, int force, int no_microcode)
+static inline void sata_oxnas_reset_ucode(struct ata_host *ah, int force,
+ int no_microcode)
{
struct sata_oxnas_host_priv *hd = ah->private_data;
DPRINTK("ENTER\n");
if (no_microcode) {
u32 reg;
+
sata_oxnas_set_mode(ah, UNKNOWN_MODE, force);
reg = ioread32(hd->core_base + DEVICE_CONTROL);
reg |= DEVICE_CONTROL_ATA_ERR_OVERRIDE;
/* if the port's not connected, complete now with an error */
if (!sata_oxnas_check_link(qc->ap)) {
- printk(KERN_ERR "port %d not connected completing with error\n",
+ ata_port_err(qc->ap,
+ "port %d not connected completing with error\n",
port_no);
qc->err_mask |= AC_ERR_ATA_BUS;
ata_qc_complete(qc);
bug_present = 1;
} else if (sector_quads_remaining) {
if (is_read) {
- printk(KERN_WARNING "SATA read fixup cannot deal with" \
- " %d quads remaining\n",
+ ata_port_warn(ap, "SATA read fixup cannot deal with "
+ "%d quads remaining\n",
sector_quads_remaining);
} else {
- printk(KERN_WARNING "SATA write fixup of %d quads" \
- " remaining not supported\n",
+ ata_port_warn(ap, "SATA write fixup of %d quads "
+ "remaining not supported\n",
sector_quads_remaining);
}
}
u32 int_status;
unsigned long flags = 0;
- DPRINTK("ENTER port %d irqstatus %x\n", ap->port_no, ioread32(port_base + INT_STATUS));
+ DPRINTK("ENTER port %d irqstatus %x\n", ap->port_no,
+ ioread32(port_base + INT_STATUS));
if (ap->qc_active & (1 << ATA_TAG_INTERNAL)) {
qc = ata_qc_from_tag(ap, ATA_TAG_INTERNAL);
DPRINTK("completing non-ncq cmd\n");
- if (qc) {
+ if (qc)
ata_qc_complete(qc);
- }
+
return;
}
local_irq_restore(flags);
ata_qc_complete(qc);
} else {
- VPRINTK("Ignoring interrupt, can't find the command tag=" \
+ VPRINTK("Ignoring interrupt, can't find the command tag="
"%d %08x\n", ap->link.active_tag, ap->qc_active);
}
/* loop until there are no more interrupts */
while ((int_status = (ioread32(core_base + CORE_INT_STATUS)) &
- (COREINT_END | (COREINT_END << 1)) )) {
+ (COREINT_END | (COREINT_END << 1)))) {
/* clear any interrupt */
iowrite32(int_status, core_base + CORE_INT_CLEAR);
/* Only need workaround_bug_6320 for single disk systems as dual
* disk will use uCode which prevents this read underrun problem
- * from occuring.
+ * from occurring.
* All single disk systems will use port 0 */
for (port_no = 0; port_no < hd->n_ports; ++port_no) {
/* check the raw end of command interrupt to see if the
if (int_status & mask) {
/* this port had an interrupt, clear it */
iowrite32(mask, core_base + CORE_INT_CLEAR);
- bug_present = ( hd->current_ucode == UNKNOWN_MODE ) ?
- sata_oxnas_bug_6320_workaround(
- ah->ports[port_no]) : 0;
+ bug_present =
+ (hd->current_ucode == UNKNOWN_MODE) ?
+ sata_oxnas_bug_6320_workaround(
+ ah->ports[port_no]):0;
sata_oxnas_port_irq(ah->ports[port_no],
bug_present);
ret = IRQ_HANDLED;
struct clk *clk = NULL;
const struct ata_port_info *ppi[] = { &sata_oxnas_port_info, NULL };
- const struct ata_port_info *dppi[] = { &sata_oxnas_port_info, &sata_oxnas_port_info, NULL };
of_property_read_u32(ofdev->dev.of_node, "nr-ports", &n_ports);
if (n_ports < 1 || n_ports > SATA_OXNAS_MAX_PORTS)
host_priv->rst_phy = rstc;
/* allocate host structure */
- host = ata_host_alloc_pinfo(&ofdev->dev, n_ports>1 ? dppi : ppi,
- n_ports);
+ host = ata_host_alloc_pinfo(&ofdev->dev, ppi, n_ports);
if (!host) {
retval = -ENOMEM;
MODULE_LICENSE("GPL");
MODULE_VERSION("1.0");
MODULE_AUTHOR("Oxford Semiconductor Ltd.");
-MODULE_DESCRIPTION("934 SATA core controler");
+MODULE_DESCRIPTION("low-level driver for Oxford 934 SATA core");
projects / openwrt / staging / zorun.git / commitdiff