* Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
* Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
* Copyright (C) 2002,2003 NEC Corporation
+ * Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com)
+ * Copyright (C) 2003-2005 Hewlett Packard
*
* All rights reserved.
*
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
- * Send feedback to <gregkh@us.ibm.com>,
- * <t-kochi@bq.jp.nec.com>
+ * Send feedback to <kristen.c.accardi@intel.com>
*
*/
#include <linux/init.h>
#include <linux/module.h>
+#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/pci.h>
+#include <linux/pci_hotplug.h>
#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
-#include "pci_hotplug.h"
#include "acpiphp.h"
-static LIST_HEAD(slot_list);
-
-#if !defined(CONFIG_HOTPLUG_PCI_ACPI_MODULE)
- #define MY_NAME "acpiphp"
-#else
- #define MY_NAME THIS_MODULE->name
-#endif
+#define MY_NAME "acpiphp"
static int debug;
int acpiphp_debug;
/* local variables */
static int num_slots;
+static struct acpiphp_attention_info *attention_info;
-#define DRIVER_VERSION "0.4"
-#define DRIVER_AUTHOR "Greg Kroah-Hartman <gregkh@us.ibm.com>, Takayoshi Kochi <t-kochi@bq.jp.nec.com>"
+#define DRIVER_VERSION "0.5"
+#define DRIVER_AUTHOR "Greg Kroah-Hartman <gregkh@us.ibm.com>, Takayoshi Kochi <t-kochi@bq.jp.nec.com>, Matthew Wilcox <willy@hp.com>"
#define DRIVER_DESC "ACPI Hot Plug PCI Controller Driver"
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
-MODULE_PARM(debug, "i");
MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
+module_param(debug, bool, 0644);
+
+/* export the attention callback registration methods */
+EXPORT_SYMBOL_GPL(acpiphp_register_attention);
+EXPORT_SYMBOL_GPL(acpiphp_unregister_attention);
static int enable_slot (struct hotplug_slot *slot);
static int disable_slot (struct hotplug_slot *slot);
static int set_attention_status (struct hotplug_slot *slot, u8 value);
-static int hardware_test (struct hotplug_slot *slot, u32 value);
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_attention_status (struct hotplug_slot *slot, u8 *value);
static int get_address (struct hotplug_slot *slot, u32 *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 *hotplug_slot, enum pci_bus_speed *value);
-static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value);
static struct hotplug_slot_ops acpi_hotplug_slot_ops = {
.owner = THIS_MODULE,
.enable_slot = enable_slot,
.disable_slot = disable_slot,
.set_attention_status = set_attention_status,
- .hardware_test = hardware_test,
.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_address = get_address,
- .get_max_bus_speed = get_max_bus_speed,
- .get_cur_bus_speed = get_cur_bus_speed,
};
-/* Inline functions to check the sanity of a pointer that is passed to us */
-static inline int slot_paranoia_check (struct slot *slot, const char *function)
+/**
+ * acpiphp_register_attention - set attention LED callback
+ * @info: must be completely filled with LED callbacks
+ *
+ * Description: this is used to register a hardware specific ACPI
+ * driver that manipulates the attention LED. All the fields in
+ * info must be set.
+ **/
+int acpiphp_register_attention(struct acpiphp_attention_info *info)
{
- if (!slot) {
- dbg("%s - slot == NULL\n", function);
- return -1;
- }
- if (slot->magic != SLOT_MAGIC) {
- dbg("%s - bad magic number for slot\n", function);
- return -1;
- }
- if (!slot->hotplug_slot) {
- dbg("%s - slot->hotplug_slot == NULL!\n", function);
- return -1;
+ int retval = -EINVAL;
+
+ if (info && info->owner && info->set_attn &&
+ info->get_attn && !attention_info) {
+ retval = 0;
+ attention_info = info;
}
- return 0;
+ return retval;
}
-static inline struct slot *get_slot (struct hotplug_slot *hotplug_slot, const char *function)
+/**
+ * acpiphp_unregister_attention - unset attention LED callback
+ * @info: must match the pointer used to register
+ *
+ * Description: this is used to un-register a hardware specific acpi
+ * driver that manipulates the attention LED. The pointer to the
+ * info struct must be the same as the one used to set it.
+ **/
+int acpiphp_unregister_attention(struct acpiphp_attention_info *info)
{
- struct slot *slot;
+ int retval = -EINVAL;
- if (!hotplug_slot) {
- dbg("%s - hotplug_slot == NULL\n", function);
- return NULL;
+ if (info && attention_info == info) {
+ attention_info = NULL;
+ retval = 0;
}
-
- slot = (struct slot *)hotplug_slot->private;
- if (slot_paranoia_check(slot, function))
- return NULL;
- return slot;
+ return retval;
}
* Actual tasks are done in acpiphp_enable_slot()
*
*/
-static int enable_slot (struct hotplug_slot *hotplug_slot)
+static int enable_slot(struct hotplug_slot *hotplug_slot)
{
- struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
- int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
+ struct slot *slot = hotplug_slot->private;
dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
/* enable the specified slot */
- retval = acpiphp_enable_slot(slot->acpi_slot);
-
- return retval;
+ return acpiphp_enable_slot(slot->acpi_slot);
}
* Actual tasks are done in acpiphp_disable_slot()
*
*/
-static int disable_slot (struct hotplug_slot *hotplug_slot)
+static int disable_slot(struct hotplug_slot *hotplug_slot)
{
- struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
- int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
+ struct slot *slot = hotplug_slot->private;
dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
/* disable the specified slot */
- retval = acpiphp_disable_slot(slot->acpi_slot);
-
- return retval;
-}
-
-
-/**
- * set_attention_status - set attention LED
- *
- * TBD:
- * ACPI doesn't have known method to manipulate
- * attention status LED.
- *
- */
-static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
-{
- int retval = 0;
-
- dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
-
- switch (status) {
- case 0:
- /* FIXME turn light off */
- hotplug_slot->info->attention_status = 0;
- break;
-
- case 1:
- default:
- /* FIXME turn light on */
- hotplug_slot->info->attention_status = 1;
- break;
- }
-
- return retval;
+ return acpiphp_disable_slot(slot->acpi_slot);
}
-/**
- * hardware_test - hardware test
+ /**
+ * set_attention_status - set attention LED
+ * @hotplug_slot: slot to set attention LED on
+ * @status: value to set attention LED to (0 or 1)
*
- * We have nothing to do for now...
- *
- */
-static int hardware_test (struct hotplug_slot *hotplug_slot, u32 value)
-{
- struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
- int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
-
- dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
-
- err("No hardware tests are defined for this driver\n");
- retval = -ENODEV;
-
+ * attention status LED, so we use a callback that
+ * was registered with us. This allows hardware specific
+ * ACPI implementations to blink the light for us.
+ **/
+ static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
+ {
+ int retval = -ENODEV;
+
+ dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+ if (attention_info && try_module_get(attention_info->owner)) {
+ retval = attention_info->set_attn(hotplug_slot, status);
+ module_put(attention_info->owner);
+ } else
+ attention_info = NULL;
return retval;
-}
-
+ }
+
/**
* get_power_status - get power status of a slot
* In that case, the value returned may not be reliable.
*
*/
-static int get_power_status (struct hotplug_slot *hotplug_slot, u8 *value)
+static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
- struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
- int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
+ struct slot *slot = hotplug_slot->private;
dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
*value = acpiphp_get_power_status(slot->acpi_slot);
- return retval;
+ return 0;
}
-/**
+ /**
* get_attention_status - get attention LED status
+ * @hotplug_slot: slot to get status from
+ * @value: returns with value of attention LED
*
- * TBD:
- * ACPI doesn't provide any formal means to access attention LED status.
- *
- */
-static int get_attention_status (struct hotplug_slot *hotplug_slot, u8 *value)
+ * ACPI doesn't have known method to determine the state
+ * of the attention status LED, so we use a callback that
+ * was registered with us. This allows hardware specific
+ * ACPI implementations to determine its state
+ **/
+static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
- int retval = 0;
+ int retval = -EINVAL;
dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
- *value = hotplug_slot->info->attention_status;
-
+ if (attention_info && try_module_get(attention_info->owner)) {
+ retval = attention_info->get_attn(hotplug_slot, value);
+ module_put(attention_info->owner);
+ } else
+ attention_info = NULL;
return retval;
}
* Instead, we fake latch status from _STA
*
*/
-static int get_latch_status (struct hotplug_slot *hotplug_slot, u8 *value)
+static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
- struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
- int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
+ struct slot *slot = hotplug_slot->private;
dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
*value = acpiphp_get_latch_status(slot->acpi_slot);
- return retval;
+ return 0;
}
* Instead, we fake adapter status from _STA
*
*/
-static int get_adapter_status (struct hotplug_slot *hotplug_slot, u8 *value)
+static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
- struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
- int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
+ struct slot *slot = hotplug_slot->private;
dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
*value = acpiphp_get_adapter_status(slot->acpi_slot);
- return retval;
+ return 0;
}
/**
* get_address - get pci address of a slot
* @hotplug_slot: slot to get status
- * @busdev: pointer to struct pci_busdev (seg, bus, dev)
- *
+ * @value: pointer to struct pci_busdev (seg, bus, dev)
*/
-static int get_address (struct hotplug_slot *hotplug_slot, u32 *value)
+static int get_address(struct hotplug_slot *hotplug_slot, u32 *value)
{
- struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
- int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
+ struct slot *slot = hotplug_slot->private;
dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
*value = acpiphp_get_address(slot->acpi_slot);
- return retval;
-}
-
-
-/* return dummy value because ACPI doesn't provide any method... */
-static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
-{
- struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
-
- if (slot == NULL)
- return -ENODEV;
-
- *value = PCI_SPEED_UNKNOWN;
-
return 0;
}
-
-/* return dummy value because ACPI doesn't provide any method... */
-static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
-{
- struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
-
- if (slot == NULL)
- return -ENODEV;
-
- *value = PCI_SPEED_UNKNOWN;
-
- return 0;
-}
-
-
-static int __init init_acpi (void)
+static int __init init_acpi(void)
{
int retval;
/* read initial number of slots */
if (!retval) {
num_slots = acpiphp_get_num_slots();
- if (num_slots == 0)
+ if (num_slots == 0) {
+ acpiphp_glue_exit();
retval = -ENODEV;
+ }
}
return retval;
}
-
-/**
- * make_slot_name - make a slot name that appears in pcihpfs
- * @slot: slot to name
- *
- */
-static void make_slot_name (struct slot *slot)
-{
- snprintf(slot->hotplug_slot->name, SLOT_NAME_SIZE, "%u",
- slot->acpi_slot->sun);
-}
-
/**
* release_slot - free up the memory used by a slot
* @hotplug_slot: slot to free
*/
static void release_slot(struct hotplug_slot *hotplug_slot)
{
- struct slot *slot = get_slot(hotplug_slot, __FUNCTION__);
-
- if (slot == NULL)
- return;
+ struct slot *slot = hotplug_slot->private;
dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
- kfree(slot->hotplug_slot->info);
- kfree(slot->hotplug_slot->name);
kfree(slot->hotplug_slot);
kfree(slot);
}
-/**
- * init_slots - initialize 'struct slot' structures for each slot
- *
- */
-static int __init init_slots (void)
+/* callback routine to initialize 'struct slot' for each slot */
+int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
{
struct slot *slot;
- int retval = 0;
- int i;
-
- for (i = 0; i < num_slots; ++i) {
- slot = kmalloc(sizeof(struct slot), GFP_KERNEL);
- if (!slot)
- return -ENOMEM;
- memset(slot, 0, sizeof(struct slot));
-
- slot->hotplug_slot = kmalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
- if (!slot->hotplug_slot) {
- kfree(slot);
- return -ENOMEM;
- }
- memset(slot->hotplug_slot, 0, sizeof(struct hotplug_slot));
+ int retval = -ENOMEM;
- slot->hotplug_slot->info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
- if (!slot->hotplug_slot->info) {
- kfree(slot->hotplug_slot);
- kfree(slot);
- return -ENOMEM;
- }
- memset(slot->hotplug_slot->info, 0, sizeof(struct hotplug_slot_info));
-
- slot->hotplug_slot->name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL);
- if (!slot->hotplug_slot->name) {
- kfree(slot->hotplug_slot->info);
- kfree(slot->hotplug_slot);
- kfree(slot);
- return -ENOMEM;
- }
+ slot = kzalloc(sizeof(*slot), GFP_KERNEL);
+ if (!slot)
+ goto error;
- slot->magic = SLOT_MAGIC;
- slot->number = i;
+ slot->hotplug_slot = kzalloc(sizeof(*slot->hotplug_slot), GFP_KERNEL);
+ if (!slot->hotplug_slot)
+ goto error_slot;
- slot->hotplug_slot->private = slot;
- slot->hotplug_slot->release = &release_slot;
- slot->hotplug_slot->ops = &acpi_hotplug_slot_ops;
+ slot->hotplug_slot->info = &slot->info;
- slot->acpi_slot = get_slot_from_id(i);
- slot->hotplug_slot->info->power_status = acpiphp_get_power_status(slot->acpi_slot);
- slot->hotplug_slot->info->attention_status = acpiphp_get_attention_status(slot->acpi_slot);
- slot->hotplug_slot->info->latch_status = acpiphp_get_latch_status(slot->acpi_slot);
- slot->hotplug_slot->info->adapter_status = acpiphp_get_adapter_status(slot->acpi_slot);
+ slot->hotplug_slot->name = slot->name;
- make_slot_name(slot);
+ slot->hotplug_slot->private = slot;
+ slot->hotplug_slot->release = &release_slot;
+ slot->hotplug_slot->ops = &acpi_hotplug_slot_ops;
- retval = pci_hp_register(slot->hotplug_slot);
- if (retval) {
- err("pci_hp_register failed with error %d\n", retval);
- release_slot(slot->hotplug_slot);
- return retval;
- }
+ slot->acpi_slot = acpiphp_slot;
+ slot->hotplug_slot->info->power_status = acpiphp_get_power_status(slot->acpi_slot);
+ slot->hotplug_slot->info->attention_status = 0;
+ slot->hotplug_slot->info->latch_status = acpiphp_get_latch_status(slot->acpi_slot);
+ slot->hotplug_slot->info->adapter_status = acpiphp_get_adapter_status(slot->acpi_slot);
+ slot->hotplug_slot->info->max_bus_speed = PCI_SPEED_UNKNOWN;
+ slot->hotplug_slot->info->cur_bus_speed = PCI_SPEED_UNKNOWN;
- /* add slot to our internal list */
- list_add(&slot->slot_list, &slot_list);
- info("Slot [%s] registered\n", slot->hotplug_slot->name);
- }
+ acpiphp_slot->slot = slot;
+ snprintf(slot->name, sizeof(slot->name), "%u", slot->acpi_slot->sun);
+
+ retval = pci_hp_register(slot->hotplug_slot);
+ if (retval) {
+ err("pci_hp_register failed with error %d\n", retval);
+ goto error_hpslot;
+ }
+ info("Slot [%s] registered\n", slot->hotplug_slot->name);
+
+ return 0;
+error_hpslot:
+ kfree(slot->hotplug_slot);
+error_slot:
+ kfree(slot);
+error:
return retval;
}
-static void __exit cleanup_slots (void)
+void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
{
- struct list_head *tmp, *n;
- struct slot *slot;
+ struct slot *slot = acpiphp_slot->slot;
+ int retval = 0;
- list_for_each_safe (tmp, n, &slot_list) {
- /* memory will be freed in release_slot callback */
- slot = list_entry(tmp, struct slot, slot_list);
- list_del(&slot->slot_list);
- pci_hp_deregister(slot->hotplug_slot);
- }
+ info ("Slot [%s] unregistered\n", slot->hotplug_slot->name);
- return;
+ retval = pci_hp_deregister(slot->hotplug_slot);
+ if (retval)
+ err("pci_hp_deregister failed with error %d\n", retval);
}
static int __init acpiphp_init(void)
{
- int retval;
-
info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
acpiphp_debug = debug;
/* read all the ACPI info from the system */
- retval = init_acpi();
- if (retval)
- return retval;
-
- retval = init_slots();
- if (retval)
- return retval;
-
- return 0;
+ return init_acpi();
}
static void __exit acpiphp_exit(void)
{
- cleanup_slots();
/* deallocate internal data structures etc. */
acpiphp_glue_exit();
}
git://git.onelab.eu / linux-2.6.git / blobdiff