1 files changed, 110 insertions, 273 deletions

diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index fb254b2454d..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"
 
@@ -69,114 +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 = {
-	.owner =		THIS_MODULE,
-	.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,
-};
-
-/*
- * Check the status of the Electro Mechanical Interlock (EMI)
- */
-static int get_lock_status(struct hotplug_slot *hotplug_slot, u8 *value)
-{
-	struct slot *slot = hotplug_slot->private;
-	return (slot->hpc_ops->get_emi_status(slot, value));
-}
-
-/*
- * sysfs interface for the Electro Mechanical Interlock (EMI)
- * 1 == locked, 0 == unlocked
- */
-static ssize_t lock_read_file(struct hotplug_slot *slot, char *buf)
-{
-	int retval;
-	u8 value;
-
-	retval = get_lock_status(slot, &value);
-	if (retval)
-		goto lock_read_exit;
-	retval = sprintf (buf, "%d\n", value);
-
-lock_read_exit:
-	return retval;
-}
-
-/*
- * Change the status of the Electro Mechanical Interlock (EMI)
- * This is a toggle - in addition there must be at least 1 second
- * in between toggles.
- */
-static int set_lock_status(struct hotplug_slot *hotplug_slot, u8 status)
-{
-	struct slot *slot = hotplug_slot->private;
-	int retval;
-	u8 value;
-
-	mutex_lock(&slot->ctrl->crit_sect);
-
-	/* has it been >1 sec since our last toggle? */
-	if ((get_seconds() - slot->last_emi_toggle) < 1) {
-		mutex_unlock(&slot->ctrl->crit_sect);
-		return -EINVAL;
-	}
-
-	/* see what our current state is */
-	retval = get_lock_status(hotplug_slot, &value);
-	if (retval || (value == status))
-		goto set_lock_exit;
-
-	slot->hpc_ops->toggle_emi(slot);
-set_lock_exit:
-	mutex_unlock(&slot->ctrl->crit_sect);
-	return 0;
-}
-
-/*
- * sysfs interface which allows the user to toggle the Electro Mechanical
- * Interlock.  Valid values are either 0 or 1.  0 == unlock, 1 == lock
- */
-static ssize_t lock_write_file(struct hotplug_slot *hotplug_slot,
-		const char *buf, size_t count)
-{
-	struct slot *slot = hotplug_slot->private;
-	unsigned long llock;
-	u8 lock;
-	int retval = 0;
-
-	llock = simple_strtoul(buf, NULL, 10);
-	lock = (u8)(llock & 0xff);
-
-	switch (lock) {
-		case 0:
-		case 1:
-			retval = set_lock_status(hotplug_slot, lock);
-			break;
-		default:
-			ctrl_err(slot->ctrl, "%d is an invalid lock value\n",
-				 lock);
-			retval = -EINVAL;
-	}
-	if (retval)
-		return retval;
-	return count;
-}
-
-static struct hotplug_slot_attribute hotplug_slot_attr_lock = {
-	.attr = {.name = "lock", .mode = S_IFREG | S_IRUGO | S_IWUSR},
-	.show = lock_read_file,
-	.store = lock_write_file
-};
+static int reset_slot		(struct hotplug_slot *slot, int probe);
 
 /**
  * release_slot - free up the memory used by a slot
@@ -189,85 +82,73 @@ 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);
 }
 
-static int init_slots(struct controller *ctrl)
+static int init_slot(struct controller *ctrl)
 {
-	struct slot *slot;
-	struct hotplug_slot *hotplug_slot;
-	struct hotplug_slot_info *info;
+	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;
 
-	list_for_each_entry(slot, &ctrl->slot_list, slot_list) {
-		hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL);
-		if (!hotplug_slot)
-			goto error;
-
-		info = kzalloc(sizeof(*info), GFP_KERNEL);
-		if (!info)
-			goto error_hpslot;
-
-		/* register this slot with the hotplug pci core */
-		hotplug_slot->info = info;
-		hotplug_slot->private = slot;
-		hotplug_slot->release = &release_slot;
-		hotplug_slot->ops = &pciehp_hotplug_slot_ops;
-		slot->hotplug_slot = hotplug_slot;
-		snprintf(name, SLOT_NAME_SIZE, "%u", slot->number);
-
- 		ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:%02x "
- 			 "hp_slot=%x sun=%x slot_device_offset=%x\n",
- 			 pci_domain_nr(ctrl->pci_dev->subordinate),
- 			 slot->bus, slot->device, slot->hp_slot, slot->number,
- 			 ctrl->slot_device_offset);
-		retval = pci_hp_register(hotplug_slot,
-					 ctrl->pci_dev->subordinate,
-					 slot->device,
-					 name);
-		if (retval) {
-			ctrl_err(ctrl, "pci_hp_register failed with error %d\n",
-				 retval);
-			goto error_info;
-		}
-		get_power_status(hotplug_slot, &info->power_status);
-		get_attention_status(hotplug_slot, &info->attention_status);
-		get_latch_status(hotplug_slot, &info->latch_status);
-		get_adapter_status(hotplug_slot, &info->adapter_status);
-		/* create additional sysfs entries */
-		if (EMI(ctrl)) {
-			retval = sysfs_create_file(&hotplug_slot->pci_slot->kobj,
-				&hotplug_slot_attr_lock.attr);
-			if (retval) {
-				pci_hp_deregister(hotplug_slot);
-				ctrl_err(ctrl, "Cannot create additional sysfs "
-					 "entries\n");
-				goto error_info;
-			}
-		}
+	hotplug = kzalloc(sizeof(*hotplug), GFP_KERNEL);
+	if (!hotplug)
+		goto out;
+
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	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;
 	}
 
-	return 0;
-error_info:
-	kfree(info);
-error_hpslot:
-	kfree(hotplug_slot);
-error:
+	/* register this slot with the hotplug pci core */
+	hotplug->info = info;
+	hotplug->private = slot;
+	hotplug->release = &release_slot;
+	hotplug->ops = ops;
+	slot->hotplug_slot = hotplug;
+	snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl));
+
+	ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:00 sun=%x\n",
+		 pci_domain_nr(ctrl->pcie->port->subordinate),
+		 ctrl->pcie->port->subordinate->number, PSN(ctrl));
+	retval = pci_hp_register(hotplug,
+				 ctrl->pcie->port->subordinate, 0, name);
+	if (retval)
+		ctrl_err(ctrl,
+			 "pci_hp_register failed with error %d\n", retval);
+out:
+	if (retval) {
+		kfree(ops);
+		kfree(info);
+		kfree(hotplug);
+	}
 	return retval;
 }
 
-static void cleanup_slots(struct controller *ctrl)
+static void cleanup_slot(struct controller *ctrl)
 {
-	struct slot *slot;
-
-	list_for_each_entry(slot, &ctrl->slot_list, slot_list) {
-		if (EMI(ctrl))
-			sysfs_remove_file(&slot->hotplug_slot->pci_slot->kobj,
-				&hotplug_slot_attr_lock.attr);
-		pci_hp_deregister(slot->hotplug_slot);
-	}
+	pci_hp_deregister(ctrl->slot->hotplug_slot);
 }
 
 /*
@@ -280,11 +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))
-		slot->hpc_ops->set_attention_status(slot, status);
-
+	pciehp_set_attention_status(slot, status);
 	return 0;
 }
 
@@ -313,107 +190,69 @@ 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 = slot->hpc_ops->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 = slot->hpc_ops->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 = slot->hpc_ops->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 = slot->hpc_ops->get_adapter_status(slot, value);
-	if (retval < 0)
-		*value = hotplug_slot->info->adapter_status;
-
-	return 0;
-}
-
-static int get_max_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 = slot->hpc_ops->get_max_bus_speed(slot, value);
-	if (retval < 0)
-		*value = PCI_SPEED_UNKNOWN;
-
+	pciehp_get_adapter_status(slot, value);
 	return 0;
 }
 
-static int get_cur_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 = slot->hpc_ops->get_cur_bus_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)
 {
 	int rc;
 	struct controller *ctrl;
-	struct slot *t_slot;
-	u8 value;
-	struct pci_dev *pdev = dev->port;
+	struct slot *slot;
+	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);
@@ -424,11 +263,10 @@ static int pciehp_probe(struct pcie_device *dev)
 	set_service_data(dev, ctrl);
 
 	/* Setup the slot information structures */
-	rc = init_slots(ctrl);
+	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;
@@ -438,69 +276,67 @@ 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 */
-	t_slot = pciehp_find_slot(ctrl, ctrl->slot_device_offset);
-	t_slot->hpc_ops->get_adapter_status(t_slot, &value);
-	if (value) {
-		if (pciehp_force)
-			pciehp_enable_slot(t_slot);
-	} else {
-		/* Power off slot if not occupied */
-		if (POWER_CTRL(ctrl)) {
-			rc = t_slot->hpc_ops->power_off_slot(t_slot);
-			if (rc)
-				goto err_out_free_ctrl_slot;
-		}
+	slot = 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;
 
 err_out_free_ctrl_slot:
-	cleanup_slots(ctrl);
+	cleanup_slot(ctrl);
 err_out_release_ctlr:
-	ctrl->hpc_ops->release_ctlr(ctrl);
+	pciehp_release_ctrl(ctrl);
 err_out_none:
 	return -ENODEV;
 }
 
-static void pciehp_remove (struct pcie_device *dev)
+static void pciehp_remove(struct pcie_device *dev)
 {
 	struct controller *ctrl = get_service_data(dev);
 
-	cleanup_slots(ctrl);
-	ctrl->hpc_ops->release_ctlr(ctrl);
+	cleanup_slot(ctrl);
+	pciehp_release_ctrl(ctrl);
 }
 
 #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 *t_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);
 
-		t_slot = pciehp_find_slot(ctrl, ctrl->slot_device_offset);
+	/* reinitialize the chipset's event detection logic */
+	pcie_enable_notification(ctrl);
 
-		/* Check if slot is occupied */
-		t_slot->hpc_ops->get_adapter_status(t_slot, &status);
-		if (status)
-			pciehp_enable_slot(t_slot);
-		else
-			pciehp_disable_slot(t_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 */
@@ -525,10 +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;
 }