* 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/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);
-
#define MY_NAME "acpiphp"
static int 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_DESC(debug, "Debugging mode enabled or not");
-module_param(debug, bool, 644);
+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 get_power_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);
.disable_slot = disable_slot,
.set_attention_status = set_attention_status,
.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,
};
+
+/**
+ * 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)
+{
+ int retval = -EINVAL;
+
+ if (info && info->owner && info->set_attn &&
+ info->get_attn && !attention_info) {
+ retval = 0;
+ attention_info = info;
+ }
+ return retval;
+}
+
+
+/**
+ * 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)
+{
+ int retval = -EINVAL;
+
+ if (info && attention_info == info) {
+ attention_info = NULL;
+ retval = 0;
+ }
+ return retval;
+}
+
+
/**
* enable_slot - power on and enable a slot
* @hotplug_slot: slot to enable
}
-/**
- * set_attention_status - set attention LED
- *
- * TBD:
- * ACPI doesn't have known method to manipulate
- * attention status LED.
+ /**
+ * set_attention_status - set attention LED
+ * @hotplug_slot: slot to set attention LED on
+ * @status: value to set attention LED to (0 or 1)
*
- */
-static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
-{
- 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 0;
-}
+ * 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
return 0;
}
+
+ /**
+ * get_attention_status - get attention LED status
+ * @hotplug_slot: slot to get status from
+ * @value: returns with value of attention LED
+ *
+ * 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 = -EINVAL;
+
+ dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+ 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;
+}
+
+
/**
* get_latch_status - get latch status of a slot
* @hotplug_slot: slot to get status
/**
* 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)
{
/* 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
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 = -ENOMEM;
- int i;
-
- for (i = 0; i < num_slots; ++i) {
- slot = kmalloc(sizeof(struct slot), GFP_KERNEL);
- if (!slot)
- goto error;
- memset(slot, 0, sizeof(struct slot));
-
- slot->hotplug_slot = kmalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
- if (!slot->hotplug_slot)
- goto error_slot;
- memset(slot->hotplug_slot, 0, sizeof(struct hotplug_slot));
-
- slot->hotplug_slot->info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
- if (!slot->hotplug_slot->info)
- goto error_hpslot;
- 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)
- goto error_info;
-
- slot->number = i;
-
- slot->hotplug_slot->private = slot;
- slot->hotplug_slot->release = &release_slot;
- slot->hotplug_slot->ops = &acpi_hotplug_slot_ops;
-
- 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->info->max_bus_speed = PCI_SPEED_UNKNOWN;
- slot->hotplug_slot->info->cur_bus_speed = PCI_SPEED_UNKNOWN;
-
- make_slot_name(slot);
-
- retval = pci_hp_register(slot->hotplug_slot);
- if (retval) {
- err("pci_hp_register failed with error %d\n", retval);
- goto error_name;
- }
- /* add slot to our internal list */
- list_add(&slot->slot_list, &slot_list);
- info("Slot [%s] registered\n", slot->hotplug_slot->name);
- }
+ slot = kzalloc(sizeof(*slot), GFP_KERNEL);
+ if (!slot)
+ goto error;
+
+ slot->hotplug_slot = kzalloc(sizeof(*slot->hotplug_slot), GFP_KERNEL);
+ if (!slot->hotplug_slot)
+ goto error_slot;
+
+ slot->hotplug_slot->info = &slot->info;
+
+ slot->hotplug_slot->name = slot->name;
+
+ slot->hotplug_slot->private = slot;
+ slot->hotplug_slot->release = &release_slot;
+ slot->hotplug_slot->ops = &acpi_hotplug_slot_ops;
+
+ 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;
+
+ 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_name:
- kfree(slot->hotplug_slot->name);
-error_info:
- kfree(slot->hotplug_slot->info);
error_hpslot:
kfree(slot->hotplug_slot);
error_slot:
}
-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);
+
+ 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;
-
- return init_slots();
+ 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