From pcihpd-discuss-admin@lists.sourceforge.net Thu May 11 19:14:09 2006 Message-ID: <4463EEB0.4050300@jp.fujitsu.com> From: Kenji Kaneshige To: Greg KH , Greg KH , Kristen Accardi Cc: Kenji Kaneshige Subject: shpchp: Cleanup interrupt handler Date: Fri, 12 May 2006 11:10:56 +0900 This patch cleans up the interrupt handler of shpchp driver. This patch has no functional changes. Signed-off-by: Kenji Kaneshige Cc: Kristen Accardi Signed-off-by: Greg Kroah-Hartman --- drivers/pci/hotplug/shpchp_hpc.c | 123 +++++++++++++++++---------------------- 1 file changed, 56 insertions(+), 67 deletions(-) --- gregkh-2.6.orig/drivers/pci/hotplug/shpchp_hpc.c +++ gregkh-2.6/drivers/pci/hotplug/shpchp_hpc.c @@ -91,6 +91,12 @@ #define ATTN_BUTTON 0x80000000 /* + * Interrupt Locator Register definitions + */ +#define CMD_INTR_PENDING (1 << 0) +#define SLOT_INTR_PENDING(i) (1 << (i + 1)) + +/* * Controller SERR-INT Register */ #define GLOBAL_INTR_MASK (1 << 0) @@ -218,7 +224,7 @@ static spinlock_t list_lock; static atomic_t shpchp_num_controllers = ATOMIC_INIT(0); -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 pt_regs *regs); static void start_int_poll_timer(struct php_ctlr_state_s *php_ctlr, int seconds); static int hpc_check_cmd_status(struct controller *ctrl); @@ -279,7 +285,7 @@ static void int_poll_timeout(unsigned lo } /* Poll for interrupt events. regs == NULL => polling */ - shpc_isr( 0, (void *)php_ctlr, NULL ); + shpc_isr(0, php_ctlr->callback_instance_id, NULL ); init_timer(&php_ctlr->int_poll_timer); if (!shpchp_poll_time) @@ -875,103 +881,86 @@ static int hpc_set_bus_speed_mode(struct 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 pt_regs *regs) { - struct controller *ctrl = NULL; - struct php_ctlr_state_s *php_ctlr; - u8 schedule_flag = 0; - u32 temp_dword, intr_loc, intr_loc2; + struct controller *ctrl = (struct controller *)dev_id; + struct php_ctlr_state_s *php_ctlr = ctrl->hpc_ctlr_handle; + u32 serr_int, slot_reg, intr_loc, intr_loc2; int hp_slot; - if (!dev_id) - return IRQ_NONE; - - if (!shpchp_poll_mode) { - ctrl = (struct controller *)dev_id; - php_ctlr = ctrl->hpc_ctlr_handle; - } else { - php_ctlr = (struct php_ctlr_state_s *) dev_id; - ctrl = (struct controller *)php_ctlr->callback_instance_id; - } - - if (!ctrl) - return IRQ_NONE; - - if (!php_ctlr || !php_ctlr->creg) - return IRQ_NONE; - /* Check to see if it was our interrupt */ intr_loc = shpc_readl(ctrl, INTR_LOC); - if (!intr_loc) return IRQ_NONE; + dbg("%s: intr_loc = %x\n",__FUNCTION__, intr_loc); if(!shpchp_poll_mode) { - /* Mask Global Interrupt Mask - see implementation note on p. 139 */ - /* of SHPC spec rev 1.0*/ - temp_dword = shpc_readl(ctrl, SERR_INTR_ENABLE); - temp_dword |= GLOBAL_INTR_MASK; - temp_dword &= ~SERR_INTR_RSVDZ_MASK; - shpc_writel(ctrl, SERR_INTR_ENABLE, temp_dword); + /* + * Mask Global Interrupt Mask - see implementation + * note on p. 139 of SHPC spec rev 1.0 + */ + serr_int = shpc_readl(ctrl, SERR_INTR_ENABLE); + serr_int |= GLOBAL_INTR_MASK; + serr_int &= ~SERR_INTR_RSVDZ_MASK; + shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int); intr_loc2 = shpc_readl(ctrl, INTR_LOC); dbg("%s: intr_loc2 = %x\n",__FUNCTION__, intr_loc2); } - if (intr_loc & 0x0001) { + if (intr_loc & CMD_INTR_PENDING) { /* * Command Complete Interrupt Pending * RO only - clear by writing 1 to the Command Completion * Detect bit in Controller SERR-INT register */ - temp_dword = shpc_readl(ctrl, SERR_INTR_ENABLE); - temp_dword &= ~SERR_INTR_RSVDZ_MASK; - shpc_writel(ctrl, SERR_INTR_ENABLE, temp_dword); + serr_int = shpc_readl(ctrl, SERR_INTR_ENABLE); + serr_int &= ~SERR_INTR_RSVDZ_MASK; + shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int); + ctrl->cmd_busy = 0; wake_up_interruptible(&ctrl->queue); } - if ((intr_loc = (intr_loc >> 1)) == 0) + if (!(intr_loc & ~CMD_INTR_PENDING)) goto out; for (hp_slot = 0; hp_slot < ctrl->num_slots; hp_slot++) { - /* To find out which slot has interrupt pending */ - if ((intr_loc >> hp_slot) & 0x01) { - temp_dword = shpc_readl(ctrl, SLOT_REG(hp_slot)); - dbg("%s: Slot %x with intr, slot register = %x\n", - __FUNCTION__, hp_slot, temp_dword); - if ((php_ctlr->switch_change_callback) && - (temp_dword & MRL_CHANGE_DETECTED)) - schedule_flag += php_ctlr->switch_change_callback( - hp_slot, php_ctlr->callback_instance_id); - if ((php_ctlr->attention_button_callback) && - (temp_dword & BUTTON_PRESS_DETECTED)) - schedule_flag += php_ctlr->attention_button_callback( - hp_slot, php_ctlr->callback_instance_id); - if ((php_ctlr->presence_change_callback) && - (temp_dword & PRSNT_CHANGE_DETECTED)) - schedule_flag += php_ctlr->presence_change_callback( - hp_slot , php_ctlr->callback_instance_id); - if ((php_ctlr->power_fault_callback) && - (temp_dword & (ISO_PFAULT_DETECTED | CON_PFAULT_DETECTED))) - schedule_flag += php_ctlr->power_fault_callback( - hp_slot, php_ctlr->callback_instance_id); - - /* Clear all slot events */ - temp_dword &= ~SLOT_REG_RSVDZ_MASK; - shpc_writel(ctrl, SLOT_REG(hp_slot), temp_dword); + /* To find out which slot has interrupt pending */ + if (!(intr_loc & SLOT_INTR_PENDING(hp_slot))) + continue; - intr_loc2 = shpc_readl(ctrl, INTR_LOC); - dbg("%s: intr_loc2 = %x\n",__FUNCTION__, intr_loc2); - } + slot_reg = shpc_readl(ctrl, SLOT_REG(hp_slot)); + dbg("%s: Slot %x with intr, slot register = %x\n", + __FUNCTION__, hp_slot, slot_reg); + + if (slot_reg & MRL_CHANGE_DETECTED) + php_ctlr->switch_change_callback( + hp_slot, php_ctlr->callback_instance_id); + + if (slot_reg & BUTTON_PRESS_DETECTED) + php_ctlr->attention_button_callback( + hp_slot, php_ctlr->callback_instance_id); + + if (slot_reg & PRSNT_CHANGE_DETECTED) + php_ctlr->presence_change_callback( + hp_slot , php_ctlr->callback_instance_id); + + if (slot_reg & (ISO_PFAULT_DETECTED | CON_PFAULT_DETECTED)) + php_ctlr->power_fault_callback( + hp_slot, php_ctlr->callback_instance_id); + + /* Clear all slot events */ + slot_reg &= ~SLOT_REG_RSVDZ_MASK; + shpc_writel(ctrl, SLOT_REG(hp_slot), slot_reg); } out: if (!shpchp_poll_mode) { /* Unmask Global Interrupt Mask */ - temp_dword = shpc_readl(ctrl, SERR_INTR_ENABLE); - temp_dword &= ~(GLOBAL_INTR_MASK | SERR_INTR_RSVDZ_MASK); - shpc_writel(ctrl, SERR_INTR_ENABLE, temp_dword); + serr_int = shpc_readl(ctrl, SERR_INTR_ENABLE); + serr_int &= ~(GLOBAL_INTR_MASK | SERR_INTR_RSVDZ_MASK); + shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int); } return IRQ_HANDLED;