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path: root/drivers/pci/hotplug/pciehp_core.c
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Diffstat (limited to 'drivers/pci/hotplug/pciehp_core.c')
-rw-r--r--drivers/pci/hotplug/pciehp_core.c90
1 files changed, 55 insertions, 35 deletions
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index 3588ea61b0d..a2297db8081 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -38,11 +38,10 @@
#include <linux/time.h>
/* Global variables */
-int pciehp_debug;
-int pciehp_poll_mode;
+bool pciehp_debug;
+bool pciehp_poll_mode;
int pciehp_poll_time;
-int pciehp_force;
-struct workqueue_struct *pciehp_wq;
+static bool pciehp_force;
#define DRIVER_VERSION "0.4"
#define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"
@@ -59,7 +58,7 @@ module_param(pciehp_force, bool, 0644);
MODULE_PARM_DESC(pciehp_debug, "Debugging mode enabled or not");
MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not");
MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds");
-MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if _OSC and OSHP are missing");
+MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if OSHP is missing");
#define PCIE_MODULE_NAME "pciehp"
@@ -70,6 +69,7 @@ static int get_power_status (struct hotplug_slot *slot, u8 *value);
static int get_attention_status (struct hotplug_slot *slot, u8 *value);
static int get_latch_status (struct hotplug_slot *slot, u8 *value);
static int get_adapter_status (struct hotplug_slot *slot, u8 *value);
+static int reset_slot (struct hotplug_slot *slot, int probe);
/**
* release_slot - free up the memory used by a slot
@@ -108,10 +108,12 @@ static int init_slot(struct controller *ctrl)
ops = kzalloc(sizeof(*ops), GFP_KERNEL);
if (!ops)
goto out;
+
ops->enable_slot = enable_slot;
ops->disable_slot = disable_slot;
ops->get_power_status = get_power_status;
ops->get_adapter_status = get_adapter_status;
+ ops->reset_slot = reset_slot;
if (MRL_SENS(ctrl))
ops->get_latch_status = get_latch_status;
if (ATTN_LED(ctrl)) {
@@ -159,7 +161,8 @@ static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
__func__, slot_name(slot));
- return pciehp_set_attention_status(slot, status);
+ pciehp_set_attention_status(slot, status);
+ return 0;
}
@@ -191,7 +194,8 @@ static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
__func__, slot_name(slot));
- return pciehp_get_power_status(slot, value);
+ pciehp_get_power_status(slot, value);
+ return 0;
}
static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
@@ -201,7 +205,8 @@ static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
__func__, slot_name(slot));
- return pciehp_get_attention_status(slot, value);
+ pciehp_get_attention_status(slot, value);
+ return 0;
}
static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
@@ -211,7 +216,8 @@ static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
__func__, slot_name(slot));
- return pciehp_get_latch_status(slot, value);
+ pciehp_get_latch_status(slot, value);
+ return 0;
}
static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
@@ -221,7 +227,18 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
__func__, slot_name(slot));
- return pciehp_get_adapter_status(slot, value);
+ pciehp_get_adapter_status(slot, value);
+ return 0;
+}
+
+static int reset_slot(struct hotplug_slot *hotplug_slot, int probe)
+{
+ struct slot *slot = hotplug_slot->private;
+
+ ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
+ __func__, slot_name(slot));
+
+ return pciehp_reset_slot(slot, probe);
}
static int pciehp_probe(struct pcie_device *dev)
@@ -235,7 +252,7 @@ static int pciehp_probe(struct pcie_device *dev)
dev_info(&dev->device,
"Bypassing BIOS check for pciehp use on %s\n",
pci_name(dev->port));
- else if (pciehp_get_hp_hw_control_from_firmware(dev->port))
+ else if (pciehp_acpi_slot_detection_check(dev->port))
goto err_out_none;
ctrl = pcie_init(dev);
@@ -249,8 +266,7 @@ static int pciehp_probe(struct pcie_device *dev)
rc = init_slot(ctrl);
if (rc) {
if (rc == -EBUSY)
- ctrl_warn(ctrl, "Slot already registered by another "
- "hotplug driver\n");
+ ctrl_warn(ctrl, "Slot already registered by another hotplug driver\n");
else
ctrl_err(ctrl, "Slot initialization failed\n");
goto err_out_release_ctlr;
@@ -267,8 +283,11 @@ static int pciehp_probe(struct pcie_device *dev)
slot = ctrl->slot;
pciehp_get_adapter_status(slot, &occupied);
pciehp_get_power_status(slot, &poweron);
- if (occupied && pciehp_force)
+ if (occupied && pciehp_force) {
+ mutex_lock(&slot->hotplug_lock);
pciehp_enable_slot(slot);
+ mutex_unlock(&slot->hotplug_lock);
+ }
/* If empty slot's power status is on, turn power off */
if (!occupied && poweron && POWER_CTRL(ctrl))
pciehp_power_off_slot(slot);
@@ -292,32 +311,32 @@ static void pciehp_remove(struct pcie_device *dev)
}
#ifdef CONFIG_PM
-static int pciehp_suspend (struct pcie_device *dev)
+static int pciehp_suspend(struct pcie_device *dev)
{
- dev_info(&dev->device, "%s ENTRY\n", __func__);
return 0;
}
-static int pciehp_resume (struct pcie_device *dev)
+static int pciehp_resume(struct pcie_device *dev)
{
- dev_info(&dev->device, "%s ENTRY\n", __func__);
- if (pciehp_force) {
- struct controller *ctrl = get_service_data(dev);
- struct slot *slot;
- u8 status;
+ struct controller *ctrl;
+ struct slot *slot;
+ u8 status;
- /* reinitialize the chipset's event detection logic */
- pcie_enable_notification(ctrl);
+ ctrl = get_service_data(dev);
- slot = ctrl->slot;
+ /* reinitialize the chipset's event detection logic */
+ pcie_enable_notification(ctrl);
- /* Check if slot is occupied */
- pciehp_get_adapter_status(slot, &status);
- if (status)
- pciehp_enable_slot(slot);
- else
- pciehp_disable_slot(slot);
- }
+ slot = ctrl->slot;
+
+ /* Check if slot is occupied */
+ pciehp_get_adapter_status(slot, &status);
+ mutex_lock(&slot->hotplug_lock);
+ if (status)
+ pciehp_enable_slot(slot);
+ else
+ pciehp_disable_slot(slot);
+ mutex_unlock(&slot->hotplug_lock);
return 0;
}
#endif /* PM */
@@ -342,10 +361,11 @@ static int __init pcied_init(void)
pciehp_firmware_init();
retval = pcie_port_service_register(&hpdriver_portdrv);
- dbg("pcie_port_service_register = %d\n", retval);
- info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
- if (retval)
+ dbg("pcie_port_service_register = %d\n", retval);
+ info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
+ if (retval)
dbg("Failure to register service\n");
+
return retval;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-13 11:01:54 +0000