aboutsummaryrefslogtreecommitdiff
path: root/drivers/pci/hotplug/pciehp_core.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/pci/hotplug/pciehp_core.c')
-rw-r--r--drivers/pci/hotplug/pciehp_core.c185
1 files changed, 71 insertions, 114 deletions
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index bc234719b1d..a2297db8081 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -30,6 +30,7 @@
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
+#include <linux/slab.h>
#include <linux/types.h>
#include <linux/pci.h>
#include "pciehp.h"
@@ -37,11 +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>"
@@ -58,7 +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"
@@ -69,20 +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 get_max_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value);
-static int get_cur_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value);
-
-static struct hotplug_slot_ops pciehp_hotplug_slot_ops = {
- .set_attention_status = set_attention_status,
- .enable_slot = enable_slot,
- .disable_slot = disable_slot,
- .get_power_status = get_power_status,
- .get_attention_status = get_attention_status,
- .get_latch_status = get_latch_status,
- .get_adapter_status = get_adapter_status,
- .get_max_bus_speed = get_max_bus_speed,
- .get_cur_bus_speed = get_cur_bus_speed,
-};
+static int reset_slot (struct hotplug_slot *slot, int probe);
/**
* release_slot - free up the memory used by a slot
@@ -95,6 +82,7 @@ static void release_slot(struct hotplug_slot *hotplug_slot)
ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
__func__, hotplug_slot_name(hotplug_slot));
+ kfree(hotplug_slot->ops);
kfree(hotplug_slot->info);
kfree(hotplug_slot);
}
@@ -104,6 +92,7 @@ static int init_slot(struct controller *ctrl)
struct slot *slot = ctrl->slot;
struct hotplug_slot *hotplug = NULL;
struct hotplug_slot_info *info = NULL;
+ struct hotplug_slot_ops *ops = NULL;
char name[SLOT_NAME_SIZE];
int retval = -ENOMEM;
@@ -115,11 +104,28 @@ static int init_slot(struct controller *ctrl)
if (!info)
goto out;
+ /* Setup hotplug slot ops */
+ 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)) {
+ ops->get_attention_status = get_attention_status;
+ ops->set_attention_status = set_attention_status;
+ }
+
/* register this slot with the hotplug pci core */
hotplug->info = info;
hotplug->private = slot;
hotplug->release = &release_slot;
- hotplug->ops = &pciehp_hotplug_slot_ops;
+ hotplug->ops = ops;
slot->hotplug_slot = hotplug;
snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl));
@@ -128,17 +134,12 @@ static int init_slot(struct controller *ctrl)
ctrl->pcie->port->subordinate->number, PSN(ctrl));
retval = pci_hp_register(hotplug,
ctrl->pcie->port->subordinate, 0, name);
- if (retval) {
+ if (retval)
ctrl_err(ctrl,
"pci_hp_register failed with error %d\n", retval);
- goto out;
- }
- get_power_status(hotplug, &info->power_status);
- get_attention_status(hotplug, &info->attention_status);
- get_latch_status(hotplug, &info->latch_status);
- get_adapter_status(hotplug, &info->adapter_status);
out:
if (retval) {
+ kfree(ops);
kfree(info);
kfree(hotplug);
}
@@ -160,11 +161,7 @@ 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));
- hotplug_slot->info->attention_status = status;
-
- if (ATTN_LED(slot->ctrl))
- pciehp_set_attention_status(slot, status);
-
+ pciehp_set_attention_status(slot, status);
return 0;
}
@@ -193,92 +190,55 @@ static int disable_slot(struct hotplug_slot *hotplug_slot)
static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
struct slot *slot = hotplug_slot->private;
- int retval;
ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
__func__, slot_name(slot));
- retval = pciehp_get_power_status(slot, value);
- if (retval < 0)
- *value = hotplug_slot->info->power_status;
-
+ pciehp_get_power_status(slot, value);
return 0;
}
static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
struct slot *slot = hotplug_slot->private;
- int retval;
ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
__func__, slot_name(slot));
- retval = pciehp_get_attention_status(slot, value);
- if (retval < 0)
- *value = hotplug_slot->info->attention_status;
-
+ pciehp_get_attention_status(slot, value);
return 0;
}
static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
struct slot *slot = hotplug_slot->private;
- int retval;
ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
__func__, slot_name(slot));
- retval = pciehp_get_latch_status(slot, value);
- if (retval < 0)
- *value = hotplug_slot->info->latch_status;
-
+ pciehp_get_latch_status(slot, value);
return 0;
}
static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
struct slot *slot = hotplug_slot->private;
- int retval;
ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
__func__, slot_name(slot));
- retval = pciehp_get_adapter_status(slot, value);
- if (retval < 0)
- *value = hotplug_slot->info->adapter_status;
-
+ pciehp_get_adapter_status(slot, value);
return 0;
}
-static int get_max_bus_speed(struct hotplug_slot *hotplug_slot,
- enum pci_bus_speed *value)
+static int reset_slot(struct hotplug_slot *hotplug_slot, int probe)
{
struct slot *slot = hotplug_slot->private;
- int retval;
ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
__func__, slot_name(slot));
- retval = pciehp_get_max_link_speed(slot, value);
- if (retval < 0)
- *value = PCI_SPEED_UNKNOWN;
-
- return 0;
-}
-
-static int get_cur_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
-{
- struct slot *slot = hotplug_slot->private;
- int retval;
-
- ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
- __func__, slot_name(slot));
-
- retval = pciehp_get_cur_link_speed(slot, value);
- if (retval < 0)
- *value = PCI_SPEED_UNKNOWN;
-
- return 0;
+ return pciehp_reset_slot(slot, probe);
}
static int pciehp_probe(struct pcie_device *dev)
@@ -286,14 +246,13 @@ static int pciehp_probe(struct pcie_device *dev)
int rc;
struct controller *ctrl;
struct slot *slot;
- u8 value;
- struct pci_dev *pdev = dev->port;
+ u8 occupied, poweron;
if (pciehp_force)
dev_info(&dev->device,
"Bypassing BIOS check for pciehp use on %s\n",
- pci_name(pdev));
- else if (pciehp_get_hp_hw_control_from_firmware(pdev))
+ pci_name(dev->port));
+ else if (pciehp_acpi_slot_detection_check(dev->port))
goto err_out_none;
ctrl = pcie_init(dev);
@@ -307,8 +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;
@@ -318,23 +276,21 @@ static int pciehp_probe(struct pcie_device *dev)
rc = pcie_init_notification(ctrl);
if (rc) {
ctrl_err(ctrl, "Notification initialization failed\n");
- goto err_out_release_ctlr;
+ goto err_out_free_ctrl_slot;
}
/* Check if slot is occupied */
slot = ctrl->slot;
- pciehp_get_adapter_status(slot, &value);
- if (value) {
- if (pciehp_force)
- pciehp_enable_slot(slot);
- } else {
- /* Power off slot if not occupied */
- if (POWER_CTRL(ctrl)) {
- rc = pciehp_power_off_slot(slot);
- if (rc)
- goto err_out_free_ctrl_slot;
- }
+ pciehp_get_adapter_status(slot, &occupied);
+ pciehp_get_power_status(slot, &poweron);
+ 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);
return 0;
@@ -355,32 +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 */
@@ -405,10 +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 2025-12-18 09:29:30 +0000