#define SLOT_EVENT_LATCH 0x2
#define SLOT_SERR_INT_MASK 0x3
-static spinlock_t hpc_event_lock;
-
DEFINE_DBG_BUFFER /* Debug string buffer for entire HPC defined here */
static struct php_ctlr_state_s *php_ctlr_list_head; /* HPC state linked list */
static int ctlr_seq_num = 0; /* Controller sequenc # */
static atomic_t shpchp_num_controllers = ATOMIC_INIT(0);
-static irqreturn_t shpc_isr(int irq, void *dev_id, struct pt_regs *regs);
-
-static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int seconds);
+static irqreturn_t shpc_isr(int irq, void *dev_id);
+static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int sec);
static int hpc_check_cmd_status(struct controller *ctrl);
static inline u8 shpc_readb(struct controller *ctrl, int reg)
return pci_read_config_dword(pdev, cap_offset + DWORD_DATA, value);
}
-/* This is the interrupt polling timeout function. */
+/*
+ * This is the interrupt polling timeout function.
+ */
static void int_poll_timeout(unsigned long lphp_ctlr)
{
- struct php_ctlr_state_s *php_ctlr = (struct php_ctlr_state_s *)lphp_ctlr;
-
- DBG_ENTER_ROUTINE
+ struct php_ctlr_state_s *php_ctlr =
+ (struct php_ctlr_state_s *)lphp_ctlr;
- if ( !php_ctlr ) {
- err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
- return;
- }
+ DBG_ENTER_ROUTINE
- /* Poll for interrupt events. regs == NULL => polling */
- shpc_isr(0, php_ctlr->callback_instance_id, NULL );
+ /* Poll for interrupt events. regs == NULL => polling */
+ shpc_isr(0, php_ctlr->callback_instance_id);
- init_timer(&php_ctlr->int_poll_timer);
+ init_timer(&php_ctlr->int_poll_timer);
if (!shpchp_poll_time)
- shpchp_poll_time = 2; /* reset timer to poll in 2 secs if user doesn't specify at module installation*/
+ shpchp_poll_time = 2; /* default polling interval is 2 sec */
- start_int_poll_timer(php_ctlr, shpchp_poll_time);
-
- return;
+ start_int_poll_timer(php_ctlr, shpchp_poll_time);
+
+ DBG_LEAVE_ROUTINE
}
-/* This function starts the interrupt polling timer. */
-static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int seconds)
+/*
+ * This function starts the interrupt polling timer.
+ */
+static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int sec)
{
- if (!php_ctlr) {
- err("%s: Invalid HPC controller handle!\n", __FUNCTION__);
- return;
- }
+ /* Clamp to sane value */
+ if ((sec <= 0) || (sec > 60))
+ sec = 2;
+
+ php_ctlr->int_poll_timer.function = &int_poll_timeout;
+ php_ctlr->int_poll_timer.data = (unsigned long)php_ctlr;
+ php_ctlr->int_poll_timer.expires = jiffies + sec * HZ;
+ add_timer(&php_ctlr->int_poll_timer);
+}
- if ( ( seconds <= 0 ) || ( seconds > 60 ) )
- seconds = 2; /* Clamp to sane value */
+/*
+ * Returns 1 if SHPC finishes executing a command within 1 sec,
+ * otherwise returns 0.
+ */
+static inline int shpc_poll_ctrl_busy(struct controller *ctrl)
+{
+ int i;
+ u16 cmd_status = shpc_readw(ctrl, CMD_STATUS);
- php_ctlr->int_poll_timer.function = &int_poll_timeout;
- php_ctlr->int_poll_timer.data = (unsigned long)php_ctlr; /* Instance data */
- php_ctlr->int_poll_timer.expires = jiffies + seconds * HZ;
- add_timer(&php_ctlr->int_poll_timer);
+ if (!(cmd_status & 0x1))
+ return 1;
+
+ /* Check every 0.1 sec for a total of 1 sec */
+ for (i = 0; i < 10; i++) {
+ msleep(100);
+ cmd_status = shpc_readw(ctrl, CMD_STATUS);
+ if (!(cmd_status & 0x1))
+ return 1;
+ }
- return;
+ return 0;
}
static inline int shpc_wait_cmd(struct controller *ctrl)
{
int retval = 0;
- unsigned int timeout_msec = shpchp_poll_mode ? 2000 : 1000;
- unsigned long timeout = msecs_to_jiffies(timeout_msec);
- int rc = wait_event_interruptible_timeout(ctrl->queue,
- !ctrl->cmd_busy, timeout);
+ unsigned long timeout = msecs_to_jiffies(1000);
+ int rc;
+
+ if (shpchp_poll_mode)
+ rc = shpc_poll_ctrl_busy(ctrl);
+ else
+ rc = wait_event_interruptible_timeout(ctrl->queue,
+ !ctrl->cmd_busy, timeout);
if (!rc) {
retval = -EIO;
- err("Command not completed in %d msec\n", timeout_msec);
+ err("Command not completed in 1000 msec\n");
} else if (rc < 0) {
retval = -EINTR;
info("Command was interrupted by a signal\n");
u16 cmd_status;
int retval = 0;
u16 temp_word;
- int i;
DBG_ENTER_ROUTINE
mutex_lock(&slot->ctrl->cmd_lock);
- for (i = 0; i < 10; i++) {
- cmd_status = shpc_readw(ctrl, CMD_STATUS);
-
- if (!(cmd_status & 0x1))
- break;
- /* Check every 0.1 sec for a total of 1 sec*/
- msleep(100);
- }
-
- cmd_status = shpc_readw(ctrl, CMD_STATUS);
-
- if (cmd_status & 0x1) {
+ if (!shpc_poll_ctrl_busy(ctrl)) {
/* After 1 sec and and the controller is still busy */
- err("%s : Controller is still busy after 1 sec.\n", __FUNCTION__);
+ err("%s : Controller is still busy after 1 sec.\n",
+ __FUNCTION__);
retval = -EBUSY;
goto out;
}
return retval;
}
-static irqreturn_t shpc_isr(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t shpc_isr(int irq, void *dev_id)
{
struct controller *ctrl = (struct controller *)dev_id;
struct php_ctlr_state_s *php_ctlr = ctrl->hpc_ctlr_handle;
void *instance_id = ctrl;
int rc, num_slots = 0;
u8 hp_slot;
- static int first = 1;
u32 shpc_base_offset;
u32 tempdword, slot_reg, slot_config;
u8 i;
ctrl->mmio_size = 0x24 + 0x4 * num_slots;
}
- if (first) {
- spin_lock_init(&hpc_event_lock);
- first = 0;
- }
-
info("HPC vendor_id %x device_id %x ss_vid %x ss_did %x\n", pdev->vendor, pdev->device, pdev->subsystem_vendor,
pdev->subsystem_device);
} else
php_ctlr->irq = pdev->irq;
- rc = request_irq(php_ctlr->irq, shpc_isr, SA_SHIRQ, MY_NAME, (void *) ctrl);
+ rc = request_irq(php_ctlr->irq, shpc_isr, IRQF_SHARED, MY_NAME, (void *) ctrl);
dbg("%s: request_irq %d for hpc%d (returns %d)\n", __FUNCTION__, php_ctlr->irq, ctlr_seq_num, rc);
if (rc) {
err("Can't get irq %d for the hotplug controller\n", php_ctlr->irq);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff