#include <linux/config.h>
#include <linux/module.h>
+#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/init.h>
#include "pci_hotplug.h"
-
-#define SLOT_MAGIC 0x67267322
struct slot {
- u32 magic;
u8 number;
struct hotplug_slot *hotplug_slot;
struct list_head slot_list;
static LIST_HEAD(slot_list);
-#if !defined(CONFIG_HOTPLUG_PCI_SKELETON_MODULE)
- #define MY_NAME "pcihp_skeleton"
-#else
- #define MY_NAME THIS_MODULE->name
-#endif
+#define MY_NAME "pcihp_skeleton"
#define dbg(format, arg...) \
do { \
static int debug;
static int num_slots;
-#define DRIVER_VERSION "0.2"
+#define DRIVER_VERSION "0.3"
#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>"
#define DRIVER_DESC "Hot Plug PCI Controller Skeleton Driver"
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
-MODULE_PARM(debug, "i");
+module_param(debug, bool, 644);
MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
static int enable_slot (struct hotplug_slot *slot);
.get_adapter_status = get_adapter_status,
};
-
-/* 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)
+static int enable_slot(struct hotplug_slot *hotplug_slot)
{
- if (!slot) {
- dbg("%s - slot == NULL", function);
- return -1;
- }
- if (slot->magic != SLOT_MAGIC) {
- dbg("%s - bad magic number for slot", function);
- return -1;
- }
- if (!slot->hotplug_slot) {
- dbg("%s - slot->hotplug_slot == NULL!", function);
- return -1;
- }
- return 0;
-}
-
-static inline struct slot *get_slot (struct hotplug_slot *hotplug_slot, const char *function)
-{
- struct slot *slot;
-
- if (!hotplug_slot) {
- dbg("%s - hotplug_slot == NULL\n", function);
- return NULL;
- }
-
- slot = (struct slot *)hotplug_slot->private;
- if (slot_paranoia_check (slot, function))
- return NULL;
- return slot;
-}
-
-
-static int enable_slot (struct hotplug_slot *hotplug_slot)
-{
- struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
+ struct slot *slot = hotplug_slot->private;
int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
-
- dbg ("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+ dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
/*
* Fill in code here to enable the specified 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__);
+ struct slot *slot = hotplug_slot->private;
int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
-
- dbg ("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+ dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
/*
* Fill in code here to disable the specified slot
return retval;
}
-static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
+static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
{
- struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
+ struct slot *slot = hotplug_slot->private;
int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
-
- dbg ("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+ dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
switch (status) {
case 0:
return retval;
}
-static int hardware_test (struct hotplug_slot *hotplug_slot, u32 value)
+static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value)
{
- struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
+ struct slot *slot = hotplug_slot->private;
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");
- retval = -ENODEV;
+ dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
+
+ switch (value) {
+ case 0:
+ /* Specify a test here */
+ break;
+ case 1:
+ /* Specify another test here */
+ break;
+ }
- /* Or you can specify a test if you want to */
-
return retval;
}
-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__);
+ struct slot *slot = hotplug_slot->private;
int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
-
+
dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
/*
return retval;
}
-static int get_attention_status (struct hotplug_slot *hotplug_slot, u8 *value)
+static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
- struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
+ struct slot *slot = hotplug_slot->private;
int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
-
+
dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
/*
return retval;
}
-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__);
+ struct slot *slot = hotplug_slot->private;
int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
-
+
dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
/*
return retval;
}
-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__);
+ struct slot *slot = hotplug_slot->private;
int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
-
+
dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
/*
return retval;
}
-static void release_slots(struct hotplug_slot *hotplug_slot)
+static void release_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);
kfree(slot->hotplug_slot->info);
}
#define SLOT_NAME_SIZE 10
-static void make_slot_name (struct slot *slot)
+static void make_slot_name(struct slot *slot)
{
/*
* Stupid way to make a filename out of the slot name.
* replace this if your hardware provides a better way to name slots.
*/
- snprintf (slot->hotplug_slot->name, SLOT_NAME_SIZE, "%d", slot->number);
+ snprintf(slot->hotplug_slot->name, SLOT_NAME_SIZE, "%d", slot->number);
}
-static int init_slots (void)
+/**
+ * init_slots - initialize 'struct slot' structures for each slot
+ *
+ */
+static int __init init_slots(void)
{
struct slot *slot;
struct hotplug_slot *hotplug_slot;
struct hotplug_slot_info *info;
char *name;
- int retval = 0;
+ int retval = -ENOMEM;
int i;
/*
* with the pci_hotplug subsystem.
*/
for (i = 0; i < num_slots; ++i) {
- slot = kmalloc (sizeof (struct slot), GFP_KERNEL);
+ slot = kmalloc(sizeof(struct slot), GFP_KERNEL);
if (!slot)
- return -ENOMEM;
+ goto error;
memset(slot, 0, sizeof(struct slot));
- hotplug_slot = kmalloc (sizeof (struct hotplug_slot), GFP_KERNEL);
- if (!hotplug_slot) {
- kfree (slot);
- return -ENOMEM;
- }
+ hotplug_slot = kmalloc(sizeof(struct hotplug_slot),
+ GFP_KERNEL);
+ if (!hotplug_slot)
+ goto error_slot;
memset(hotplug_slot, 0, sizeof (struct hotplug_slot));
slot->hotplug_slot = hotplug_slot;
- info = kmalloc (sizeof (struct hotplug_slot_info), GFP_KERNEL);
- if (!info) {
- kfree (hotplug_slot);
- kfree (slot);
- return -ENOMEM;
- }
+ info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
+ if (!info)
+ goto error_hpslot;
memset(info, 0, sizeof (struct hotplug_slot_info));
hotplug_slot->info = info;
- name = kmalloc (SLOT_NAME_SIZE, GFP_KERNEL);
- if (!name) {
- kfree (info);
- kfree (hotplug_slot);
- kfree (slot);
- return -ENOMEM;
- }
+ name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL);
+ if (!name)
+ goto error_info;
hotplug_slot->name = name;
- slot->magic = SLOT_MAGIC;
slot->number = i;
hotplug_slot->private = slot;
hotplug_slot->release = &release_slot;
- make_slot_name (slot);
+ make_slot_name(slot);
hotplug_slot->ops = &skel_hotplug_slot_ops;
/*
info->latch_status = get_latch_status(slot);
info->adapter_status = get_adapter_status(slot);
- dbg ("registering slot %d\n", i);
- retval = pci_hp_register (slot->hotplug_slot);
+ dbg("registering slot %d\n", i);
+ retval = pci_hp_register(slot->hotplug_slot);
if (retval) {
- err ("pci_hp_register failed with error %d\n", retval);
- kfree (info);
- kfree (name);
- kfree (hotplug_slot);
- kfree (slot);
- return 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);
+ list_add(&slot->slot_list, &slot_list);
}
+ return 0;
+error_name:
+ kfree(name);
+error_info:
+ kfree(info);
+error_hpslot:
+ kfree(hotplug_slot);
+error_slot:
+ kfree(slot);
+error:
return retval;
}
-static void cleanup_slots(void)
+static void __exit cleanup_slots(void)
{
struct list_head *tmp;
struct list_head *next;
* Memory will be freed in release_slot() callback after slot's
* lifespan is finished.
*/
- list_for_each_safe (tmp, next, &slot_list) {
- slot = list_entry (tmp, struct slot, slot_list);
- list_del (&slot->slot_list);
- pci_hp_deregister (slot->hotplug_slot);
+ list_for_each_safe(tmp, next, &slot_list) {
+ slot = list_entry(tmp, struct slot, slot_list);
+ list_del(&slot->slot_list);
+ pci_hp_deregister(slot->hotplug_slot);
}
}
{
int retval;
+ info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
/*
* Do specific initialization stuff for your driver here
- * Like initilizing your controller hardware (if any) and
+ * Like initializing your controller hardware (if any) and
* determining the number of slots you have in the system
* right now.
*/
num_slots = 5;
- retval = init_slots();
- if (retval)
- return retval;
-
- info (DRIVER_DESC " version: " DRIVER_VERSION "\n");
- return 0;
+ return init_slots();
}
static void __exit pcihp_skel_exit(void)
module_init(pcihp_skel_init);
module_exit(pcihp_skel_exit);
-
git://git.onelab.eu / linux-2.6.git / blobdiff