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path: root/drivers/pci/hotplug
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Diffstat (limited to 'drivers/pci/hotplug')
-rw-r--r--drivers/pci/hotplug/pciehp.h8
-rw-r--r--drivers/pci/hotplug/pciehp_ctrl.c22
-rw-r--r--drivers/pci/hotplug/pciehp_hpc.c42
3 files changed, 37 insertions, 35 deletions
diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h
index 8264a768043..920091c4b18 100644
--- a/drivers/pci/hotplug/pciehp.h
+++ b/drivers/pci/hotplug/pciehp.h
@@ -146,10 +146,10 @@ struct controller {
extern int pciehp_sysfs_enable_slot(struct slot *slot);
extern int pciehp_sysfs_disable_slot(struct slot *slot);
-extern u8 pciehp_handle_attention_button(u8 hp_slot, struct controller *ctrl);
-extern u8 pciehp_handle_switch_change(u8 hp_slot, struct controller *ctrl);
-extern u8 pciehp_handle_presence_change(u8 hp_slot, struct controller *ctrl);
-extern u8 pciehp_handle_power_fault(u8 hp_slot, struct controller *ctrl);
+extern u8 pciehp_handle_attention_button(struct slot *p_slot);
+ extern u8 pciehp_handle_switch_change(struct slot *p_slot);
+extern u8 pciehp_handle_presence_change(struct slot *p_slot);
+extern u8 pciehp_handle_power_fault(struct slot *p_slot);
extern int pciehp_configure_device(struct slot *p_slot);
extern int pciehp_unconfigure_device(struct slot *p_slot);
extern void pciehp_queue_pushbutton_work(struct work_struct *work);
diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c
index 0a7aa628e95..7ad8a7dbc1a 100644
--- a/drivers/pci/hotplug/pciehp_ctrl.c
+++ b/drivers/pci/hotplug/pciehp_ctrl.c
@@ -55,16 +55,13 @@ static int queue_interrupt_event(struct slot *p_slot, u32 event_type)
return 0;
}
-u8 pciehp_handle_attention_button(u8 hp_slot, struct controller *ctrl)
+u8 pciehp_handle_attention_button(struct slot *p_slot)
{
- struct slot *p_slot;
u32 event_type;
/* Attention Button Change */
dbg("pciehp: Attention button interrupt received.\n");
- p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
-
/*
* Button pressed - See if need to TAKE ACTION!!!
*/
@@ -76,18 +73,15 @@ u8 pciehp_handle_attention_button(u8 hp_slot, struct controller *ctrl)
return 0;
}
-u8 pciehp_handle_switch_change(u8 hp_slot, struct controller *ctrl)
+u8 pciehp_handle_switch_change(struct slot *p_slot)
{
- struct slot *p_slot;
u8 getstatus;
u32 event_type;
/* Switch Change */
dbg("pciehp: Switch interrupt received.\n");
- p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
-
if (getstatus) {
/*
* Switch opened
@@ -107,17 +101,14 @@ u8 pciehp_handle_switch_change(u8 hp_slot, struct controller *ctrl)
return 1;
}
-u8 pciehp_handle_presence_change(u8 hp_slot, struct controller *ctrl)
+u8 pciehp_handle_presence_change(struct slot *p_slot)
{
- struct slot *p_slot;
u32 event_type;
u8 presence_save;
/* Presence Change */
dbg("pciehp: Presence/Notify input change.\n");
- p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
-
/* Switch is open, assume a presence change
* Save the presence state
*/
@@ -141,16 +132,13 @@ u8 pciehp_handle_presence_change(u8 hp_slot, struct controller *ctrl)
return 1;
}
-u8 pciehp_handle_power_fault(u8 hp_slot, struct controller *ctrl)
+u8 pciehp_handle_power_fault(struct slot *p_slot)
{
- struct slot *p_slot;
u32 event_type;
/* power fault */
dbg("pciehp: Power fault interrupt received.\n");
- p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
-
if ( !(p_slot->hpc_ops->query_power_fault(p_slot))) {
/*
* power fault Cleared
@@ -163,7 +151,7 @@ u8 pciehp_handle_power_fault(u8 hp_slot, struct controller *ctrl)
*/
info("Power fault on Slot(%s)\n", p_slot->name);
event_type = INT_POWER_FAULT;
- info("power fault bit %x set\n", hp_slot);
+ info("power fault bit %x set\n", 0);
}
queue_interrupt_event(p_slot, event_type);
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 891f81a0400..425a0f60997 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -722,6 +722,7 @@ static irqreturn_t pcie_isr(int irq, void *dev_id)
{
struct controller *ctrl = (struct controller *)dev_id;
u16 detected, intr_loc;
+ struct slot *p_slot;
/*
* In order to guarantee that all interrupt events are
@@ -756,21 +757,38 @@ static irqreturn_t pcie_isr(int irq, void *dev_id)
wake_up_interruptible(&ctrl->queue);
}
+ if (!(intr_loc & ~CMD_COMPLETED))
+ return IRQ_HANDLED;
+
+ /*
+ * Return without handling events if this handler routine is
+ * called before controller initialization is done. This may
+ * happen if hotplug event or another interrupt that shares
+ * the IRQ with pciehp arrives before slot initialization is
+ * done after interrupt handler is registered.
+ *
+ * FIXME - Need more structural fixes. We need to be ready to
+ * handle the event before installing interrupt handler.
+ */
+ p_slot = pciehp_find_slot(ctrl, ctrl->slot_device_offset);
+ if (!p_slot || !p_slot->hpc_ops)
+ return IRQ_HANDLED;
+
/* Check MRL Sensor Changed */
if (intr_loc & MRL_SENS_CHANGED)
- pciehp_handle_switch_change(0, ctrl);
+ pciehp_handle_switch_change(p_slot);
/* Check Attention Button Pressed */
if (intr_loc & ATTN_BUTTN_PRESSED)
- pciehp_handle_attention_button(0, ctrl);
+ pciehp_handle_attention_button(p_slot);
/* Check Presence Detect Changed */
if (intr_loc & PRSN_DETECT_CHANGED)
- pciehp_handle_presence_change(0, ctrl);
+ pciehp_handle_presence_change(p_slot);
/* Check Power Fault Detected */
if (intr_loc & PWR_FAULT_DETECTED)
- pciehp_handle_power_fault(0, ctrl);
+ pciehp_handle_power_fault(p_slot);
return IRQ_HANDLED;
}
@@ -1028,6 +1046,12 @@ static int pciehp_acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev)
static int pcie_init_hardware_part1(struct controller *ctrl,
struct pcie_device *dev)
{
+ /* Clear all remaining event bits in Slot Status register */
+ if (pciehp_writew(ctrl, SLOTSTATUS, 0x1f)) {
+ err("%s: Cannot write to SLOTSTATUS register\n", __func__);
+ return -1;
+ }
+
/* Mask Hot-plug Interrupt Enable */
if (pcie_write_cmd(ctrl, 0, HP_INTR_ENABLE | CMD_CMPL_INTR_ENABLE)) {
err("%s: Cannot mask hotplug interrupt enable\n", __func__);
@@ -1040,16 +1064,6 @@ int pcie_init_hardware_part2(struct controller *ctrl, struct pcie_device *dev)
{
u16 cmd, mask;
- /*
- * We need to clear all events before enabling hotplug interrupt
- * notification mechanism in order for hotplug controler to
- * generate interrupts.
- */
- if (pciehp_writew(ctrl, SLOTSTATUS, 0x1f)) {
- err("%s: Cannot write to SLOTSTATUS register\n", __FUNCTION__);
- return -1;
- }
-
cmd = PRSN_DETECT_ENABLE;
if (ATTN_BUTTN(ctrl))
cmd |= ATTN_BUTTN_ENABLE;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 09:18:44 +0000