# Makefile for the PCI bus specific drivers.
#
-obj-y += access.o bus.o probe.o remove.o pci.o quirks.o \
+obj-y += access.o bus.o probe.o remove.o pci.o quirks.o slot.o \
pci-driver.o search.o pci-sysfs.o rom.o setup-res.o
obj-$(CONFIG_PROC_FS) += proc.o
extern u8 acpiphp_get_attention_status (struct acpiphp_slot *slot);
extern u8 acpiphp_get_latch_status (struct acpiphp_slot *slot);
extern u8 acpiphp_get_adapter_status (struct acpiphp_slot *slot);
-extern u32 acpiphp_get_address (struct acpiphp_slot *slot);
/* variables */
extern int acpiphp_debug;
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);
.get_attention_status = get_attention_status,
.get_latch_status = get_latch_status,
.get_adapter_status = get_adapter_status,
- .get_address = get_address,
};
return 0;
}
-
-/**
- * get_address - get pci address of a slot
- * @hotplug_slot: slot to get status
- * @value: pointer to struct pci_busdev (seg, bus, dev)
- */
-static int get_address(struct hotplug_slot *hotplug_slot, u32 *value)
-{
- struct slot *slot = hotplug_slot->private;
-
- dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
-
- *value = acpiphp_get_address(slot->acpi_slot);
-
- return 0;
-}
-
static int __init init_acpi(void)
{
int retval;
acpiphp_slot->slot = slot;
snprintf(slot->name, sizeof(slot->name), "%u", slot->acpi_slot->sun);
- retval = pci_hp_register(slot->hotplug_slot);
+ retval = pci_hp_register(slot->hotplug_slot,
+ acpiphp_slot->bridge->pci_bus,
+ acpiphp_slot->device);
+ if (retval == -EBUSY)
+ goto error_hpslot;
if (retval) {
err("pci_hp_register failed with error %d\n", retval);
goto error_hpslot;
bridge->pci_bus->number, slot->device);
retval = acpiphp_register_hotplug_slot(slot);
if (retval) {
- warn("acpiphp_register_hotplug_slot failed(err code = 0x%x)\n", retval);
+ if (retval == -EBUSY)
+ warn("Slot %d already registered by another "
+ "hotplug driver\n", slot->sun);
+ else
+ warn("acpiphp_register_hotplug_slot failed "
+ "(err code = 0x%x)\n", retval);
goto err_exit;
}
}
return (sta == 0) ? 0 : 1;
}
-
-
-/*
- * pci address (seg/bus/dev)
- */
-u32 acpiphp_get_address(struct acpiphp_slot *slot)
-{
- u32 address;
- struct pci_bus *pci_bus = slot->bridge->pci_bus;
-
- address = (pci_domain_nr(pci_bus) << 16) |
- (pci_bus->number << 8) |
- slot->device;
-
- return address;
-}
#include <linux/kobject.h>
#include <asm/uaccess.h>
#include <linux/moduleparam.h>
+#include <linux/pci.h>
#include "acpiphp.h"
+#include "../pci.h"
#define DRIVER_VERSION "1.0.1"
#define DRIVER_AUTHOR "Irene Zubarev <zubarev@us.ibm.com>, Vernon Mauery <vernux@us.ibm.com>"
int retval = 0;
acpi_status status;
struct acpi_device *device;
- struct kobject *sysdir = &pci_hotplug_slots_kset->kobj;
+ struct kobject *sysdir = &pci_slots_kset->kobj;
dbg("%s\n", __func__);
static void __exit ibm_acpiphp_exit(void)
{
acpi_status status;
- struct kobject *sysdir = &pci_hotplug_slots_kset->kobj;
+ struct kobject *sysdir = &pci_slots_kset->kobj;
dbg("%s\n", __func__);
info->attention_status = cpci_get_attention_status(slot);
dbg("registering slot %s", slot->hotplug_slot->name);
- status = pci_hp_register(slot->hotplug_slot);
+ status = pci_hp_register(slot->hotplug_slot, bus, i);
if (status) {
err("pci_hp_register failed with error %d", status);
goto error_name;
slot->bus, slot->device,
slot->number, ctrl->slot_device_offset,
slot_number);
- result = pci_hp_register(hotplug_slot);
+ result = pci_hp_register(hotplug_slot,
+ ctrl->pci_dev->subordinate,
+ slot->device);
if (result) {
err("pci_hp_register failed with error %d\n", result);
goto error_name;
slot->release = &dummy_release;
slot->private = dslot;
- retval = pci_hp_register(slot);
+ retval = pci_hp_register(slot, dev->bus, PCI_SLOT(dev->devfn));
if (retval) {
err("pci_hp_register failed with error %d\n", retval);
goto error_dslot;
tmp_slot = list_entry (list, struct slot, ibm_slot_list);
snprintf (tmp_slot->hotplug_slot->name, 30, "%s", create_file_name (tmp_slot));
- pci_hp_register (tmp_slot->hotplug_slot);
+ pci_hp_register(tmp_slot->hotplug_slot,
+ pci_find_bus(0, tmp_slot->bus), tmp_slot->device);
}
print_ebda_hpc ();
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
#include <asm/uaccess.h>
+#include "../pci.h"
#define MY_NAME "pci_hotplug"
//////////////////////////////////////////////////////////////////
static LIST_HEAD(pci_hotplug_slot_list);
-
-struct kset *pci_hotplug_slots_kset;
-
-static ssize_t hotplug_slot_attr_show(struct kobject *kobj,
- struct attribute *attr, char *buf)
-{
- struct hotplug_slot *slot = to_hotplug_slot(kobj);
- struct hotplug_slot_attribute *attribute = to_hotplug_attr(attr);
- return attribute->show ? attribute->show(slot, buf) : -EIO;
-}
-
-static ssize_t hotplug_slot_attr_store(struct kobject *kobj,
- struct attribute *attr, const char *buf, size_t len)
-{
- struct hotplug_slot *slot = to_hotplug_slot(kobj);
- struct hotplug_slot_attribute *attribute = to_hotplug_attr(attr);
- return attribute->store ? attribute->store(slot, buf, len) : -EIO;
-}
-
-static struct sysfs_ops hotplug_slot_sysfs_ops = {
- .show = hotplug_slot_attr_show,
- .store = hotplug_slot_attr_store,
-};
-
-static void hotplug_slot_release(struct kobject *kobj)
-{
- struct hotplug_slot *slot = to_hotplug_slot(kobj);
- if (slot->release)
- slot->release(slot);
-}
-
-static struct kobj_type hotplug_slot_ktype = {
- .sysfs_ops = &hotplug_slot_sysfs_ops,
- .release = &hotplug_slot_release,
-};
+static DEFINE_SPINLOCK(pci_hotplug_slot_list_lock);
/* these strings match up with the values in pci_bus_speed */
static char *pci_bus_speed_strings[] = {
GET_STATUS(attention_status, u8)
GET_STATUS(latch_status, u8)
GET_STATUS(adapter_status, u8)
-GET_STATUS(address, u32)
GET_STATUS(max_bus_speed, enum pci_bus_speed)
GET_STATUS(cur_bus_speed, enum pci_bus_speed)
-static ssize_t power_read_file (struct hotplug_slot *slot, char *buf)
+static ssize_t power_read_file(struct pci_slot *slot, char *buf)
{
int retval;
u8 value;
- retval = get_power_status (slot, &value);
+ retval = get_power_status(slot->hotplug, &value);
if (retval)
goto exit;
retval = sprintf (buf, "%d\n", value);
return retval;
}
-static ssize_t power_write_file (struct hotplug_slot *slot, const char *buf,
+static ssize_t power_write_file(struct pci_slot *pci_slot, const char *buf,
size_t count)
{
+ struct hotplug_slot *slot = pci_slot->hotplug;
unsigned long lpower;
u8 power;
int retval = 0;
return count;
}
-static struct hotplug_slot_attribute hotplug_slot_attr_power = {
+static struct pci_slot_attribute hotplug_slot_attr_power = {
.attr = {.name = "power", .mode = S_IFREG | S_IRUGO | S_IWUSR},
.show = power_read_file,
.store = power_write_file
};
-static ssize_t attention_read_file (struct hotplug_slot *slot, char *buf)
+static ssize_t attention_read_file(struct pci_slot *slot, char *buf)
{
int retval;
u8 value;
- retval = get_attention_status (slot, &value);
+ retval = get_attention_status(slot->hotplug, &value);
if (retval)
goto exit;
- retval = sprintf (buf, "%d\n", value);
+ retval = sprintf(buf, "%d\n", value);
exit:
return retval;
}
-static ssize_t attention_write_file (struct hotplug_slot *slot, const char *buf,
+static ssize_t attention_write_file(struct pci_slot *slot, const char *buf,
size_t count)
{
+ struct hotplug_slot_ops *ops = slot->hotplug->ops;
unsigned long lattention;
u8 attention;
int retval = 0;
attention = (u8)(lattention & 0xff);
dbg (" - attention = %d\n", attention);
- if (!try_module_get(slot->ops->owner)) {
+ if (!try_module_get(ops->owner)) {
retval = -ENODEV;
goto exit;
}
- if (slot->ops->set_attention_status)
- retval = slot->ops->set_attention_status(slot, attention);
- module_put(slot->ops->owner);
+ if (ops->set_attention_status)
+ retval = ops->set_attention_status(slot->hotplug, attention);
+ module_put(ops->owner);
exit:
if (retval)
return count;
}
-static struct hotplug_slot_attribute hotplug_slot_attr_attention = {
+static struct pci_slot_attribute hotplug_slot_attr_attention = {
.attr = {.name = "attention", .mode = S_IFREG | S_IRUGO | S_IWUSR},
.show = attention_read_file,
.store = attention_write_file
};
-static ssize_t latch_read_file (struct hotplug_slot *slot, char *buf)
+static ssize_t latch_read_file(struct pci_slot *slot, char *buf)
{
int retval;
u8 value;
- retval = get_latch_status (slot, &value);
+ retval = get_latch_status(slot->hotplug, &value);
if (retval)
goto exit;
retval = sprintf (buf, "%d\n", value);
return retval;
}
-static struct hotplug_slot_attribute hotplug_slot_attr_latch = {
+static struct pci_slot_attribute hotplug_slot_attr_latch = {
.attr = {.name = "latch", .mode = S_IFREG | S_IRUGO},
.show = latch_read_file,
};
-static ssize_t presence_read_file (struct hotplug_slot *slot, char *buf)
+static ssize_t presence_read_file(struct pci_slot *slot, char *buf)
{
int retval;
u8 value;
- retval = get_adapter_status (slot, &value);
+ retval = get_adapter_status(slot->hotplug, &value);
if (retval)
goto exit;
retval = sprintf (buf, "%d\n", value);
return retval;
}
-static struct hotplug_slot_attribute hotplug_slot_attr_presence = {
+static struct pci_slot_attribute hotplug_slot_attr_presence = {
.attr = {.name = "adapter", .mode = S_IFREG | S_IRUGO},
.show = presence_read_file,
};
-static ssize_t address_read_file (struct hotplug_slot *slot, char *buf)
-{
- int retval;
- u32 address;
-
- retval = get_address (slot, &address);
- if (retval)
- goto exit;
- retval = sprintf (buf, "%04x:%02x:%02x\n",
- (address >> 16) & 0xffff,
- (address >> 8) & 0xff,
- address & 0xff);
-
-exit:
- return retval;
-}
-
-static struct hotplug_slot_attribute hotplug_slot_attr_address = {
- .attr = {.name = "address", .mode = S_IFREG | S_IRUGO},
- .show = address_read_file,
-};
-
static char *unknown_speed = "Unknown bus speed";
-static ssize_t max_bus_speed_read_file (struct hotplug_slot *slot, char *buf)
+static ssize_t max_bus_speed_read_file(struct pci_slot *slot, char *buf)
{
char *speed_string;
int retval;
enum pci_bus_speed value;
- retval = get_max_bus_speed (slot, &value);
+ retval = get_max_bus_speed(slot->hotplug, &value);
if (retval)
goto exit;
return retval;
}
-static struct hotplug_slot_attribute hotplug_slot_attr_max_bus_speed = {
+static struct pci_slot_attribute hotplug_slot_attr_max_bus_speed = {
.attr = {.name = "max_bus_speed", .mode = S_IFREG | S_IRUGO},
.show = max_bus_speed_read_file,
};
-static ssize_t cur_bus_speed_read_file (struct hotplug_slot *slot, char *buf)
+static ssize_t cur_bus_speed_read_file(struct pci_slot *slot, char *buf)
{
char *speed_string;
int retval;
enum pci_bus_speed value;
- retval = get_cur_bus_speed (slot, &value);
+ retval = get_cur_bus_speed(slot->hotplug, &value);
if (retval)
goto exit;
return retval;
}
-static struct hotplug_slot_attribute hotplug_slot_attr_cur_bus_speed = {
+static struct pci_slot_attribute hotplug_slot_attr_cur_bus_speed = {
.attr = {.name = "cur_bus_speed", .mode = S_IFREG | S_IRUGO},
.show = cur_bus_speed_read_file,
};
-static ssize_t test_write_file (struct hotplug_slot *slot, const char *buf,
+static ssize_t test_write_file(struct pci_slot *pci_slot, const char *buf,
size_t count)
{
+ struct hotplug_slot *slot = pci_slot->hotplug;
unsigned long ltest;
u32 test;
int retval = 0;
return count;
}
-static struct hotplug_slot_attribute hotplug_slot_attr_test = {
+static struct pci_slot_attribute hotplug_slot_attr_test = {
.attr = {.name = "test", .mode = S_IFREG | S_IRUGO | S_IWUSR},
.store = test_write_file
};
-static int has_power_file (struct hotplug_slot *slot)
+static int has_power_file(struct pci_slot *pci_slot)
{
+ struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
return -ENODEV;
if ((slot->ops->enable_slot) ||
return -ENOENT;
}
-static int has_attention_file (struct hotplug_slot *slot)
+static int has_attention_file(struct pci_slot *pci_slot)
{
+ struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
return -ENODEV;
if ((slot->ops->set_attention_status) ||
return -ENOENT;
}
-static int has_latch_file (struct hotplug_slot *slot)
+static int has_latch_file(struct pci_slot *pci_slot)
{
+ struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
return -ENODEV;
if (slot->ops->get_latch_status)
return -ENOENT;
}
-static int has_adapter_file (struct hotplug_slot *slot)
+static int has_adapter_file(struct pci_slot *pci_slot)
{
+ struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
return -ENODEV;
if (slot->ops->get_adapter_status)
return -ENOENT;
}
-static int has_address_file (struct hotplug_slot *slot)
-{
- if ((!slot) || (!slot->ops))
- return -ENODEV;
- if (slot->ops->get_address)
- return 0;
- return -ENOENT;
-}
-
-static int has_max_bus_speed_file (struct hotplug_slot *slot)
+static int has_max_bus_speed_file(struct pci_slot *pci_slot)
{
+ struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
return -ENODEV;
if (slot->ops->get_max_bus_speed)
return -ENOENT;
}
-static int has_cur_bus_speed_file (struct hotplug_slot *slot)
+static int has_cur_bus_speed_file(struct pci_slot *pci_slot)
{
+ struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
return -ENODEV;
if (slot->ops->get_cur_bus_speed)
return -ENOENT;
}
-static int has_test_file (struct hotplug_slot *slot)
+static int has_test_file(struct pci_slot *pci_slot)
{
+ struct hotplug_slot *slot = pci_slot->hotplug;
if ((!slot) || (!slot->ops))
return -ENODEV;
if (slot->ops->hardware_test)
return -ENOENT;
}
-static int fs_add_slot (struct hotplug_slot *slot)
+static int fs_add_slot(struct pci_slot *slot)
{
int retval = 0;
goto exit_adapter;
}
- if (has_address_file(slot) == 0) {
- retval = sysfs_create_file(&slot->kobj,
- &hotplug_slot_attr_address.attr);
- if (retval)
- goto exit_address;
- }
-
if (has_max_bus_speed_file(slot) == 0) {
retval = sysfs_create_file(&slot->kobj,
&hotplug_slot_attr_max_bus_speed.attr);
sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_max_bus_speed.attr);
exit_max_speed:
- if (has_address_file(slot) == 0)
- sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_address.attr);
-
-exit_address:
if (has_adapter_file(slot) == 0)
sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_presence.attr);
return retval;
}
-static void fs_remove_slot (struct hotplug_slot *slot)
+static void fs_remove_slot(struct pci_slot *slot)
{
if (has_power_file(slot) == 0)
sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_power.attr);
if (has_adapter_file(slot) == 0)
sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_presence.attr);
- if (has_address_file(slot) == 0)
- sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_address.attr);
-
if (has_max_bus_speed_file(slot) == 0)
sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_max_bus_speed.attr);
struct hotplug_slot *slot;
struct list_head *tmp;
+ spin_lock(&pci_hotplug_slot_list_lock);
list_for_each (tmp, &pci_hotplug_slot_list) {
slot = list_entry (tmp, struct hotplug_slot, slot_list);
if (strcmp(slot->name, name) == 0)
- return slot;
+ goto out;
}
- return NULL;
+ slot = NULL;
+out:
+ spin_unlock(&pci_hotplug_slot_list_lock);
+ return slot;
}
/**
*
* Returns 0 if successful, anything else for an error.
*/
-int pci_hp_register (struct hotplug_slot *slot)
+int pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus, int slot_nr)
{
int result;
+ struct pci_slot *pci_slot;
struct hotplug_slot *tmp;
if (slot == NULL)
if (tmp)
return -EEXIST;
- slot->kobj.kset = pci_hotplug_slots_kset;
- result = kobject_init_and_add(&slot->kobj, &hotplug_slot_ktype, NULL,
- "%s", slot->name);
- if (result) {
- err("Unable to register kobject '%s'", slot->name);
- return -EINVAL;
+ pci_slot = pci_create_slot(bus, slot_nr, slot->name);
+ if (IS_ERR(pci_slot))
+ return PTR_ERR(pci_slot);
+
+ if (pci_slot->hotplug) {
+ dbg("%s: already claimed\n", __func__);
+ pci_destroy_slot(pci_slot);
+ return -EBUSY;
}
- list_add (&slot->slot_list, &pci_hotplug_slot_list);
+ slot->pci_slot = pci_slot;
+ pci_slot->hotplug = slot;
+
+ spin_lock(&pci_hotplug_slot_list_lock);
+ list_add(&slot->slot_list, &pci_hotplug_slot_list);
+ spin_unlock(&pci_hotplug_slot_list_lock);
+
+ result = fs_add_slot(pci_slot);
+ kobject_uevent(&pci_slot->kobj, KOBJ_ADD);
+ dbg("Added slot %s to the list\n", slot->name);
+
- result = fs_add_slot (slot);
- kobject_uevent(&slot->kobj, KOBJ_ADD);
- dbg ("Added slot %s to the list\n", slot->name);
return result;
}
*
* Returns 0 if successful, anything else for an error.
*/
-int pci_hp_deregister (struct hotplug_slot *slot)
+int pci_hp_deregister(struct hotplug_slot *hotplug)
{
struct hotplug_slot *temp;
+ struct pci_slot *slot;
- if (slot == NULL)
+ if (!hotplug)
return -ENODEV;
- temp = get_slot_from_name (slot->name);
- if (temp != slot) {
+ temp = get_slot_from_name(hotplug->name);
+ if (temp != hotplug)
return -ENODEV;
- }
- list_del (&slot->slot_list);
- fs_remove_slot (slot);
- dbg ("Removed slot %s from the list\n", slot->name);
- kobject_put(&slot->kobj);
+ spin_lock(&pci_hotplug_slot_list_lock);
+ list_del(&hotplug->slot_list);
+ spin_unlock(&pci_hotplug_slot_list_lock);
+
+ slot = hotplug->pci_slot;
+ fs_remove_slot(slot);
+ dbg("Removed slot %s from the list\n", hotplug->name);
+
+ hotplug->release(hotplug);
+ slot->hotplug = NULL;
+ pci_destroy_slot(slot);
+
return 0;
}
*
* Returns 0 if successful, anything else for an error.
*/
-int __must_check pci_hp_change_slot_info(struct hotplug_slot *slot,
+int __must_check pci_hp_change_slot_info(struct hotplug_slot *hotplug,
struct hotplug_slot_info *info)
{
- if ((slot == NULL) || (info == NULL))
+ struct pci_slot *slot;
+ if (!hotplug || !info)
return -ENODEV;
+ slot = hotplug->pci_slot;
- memcpy (slot->info, info, sizeof (struct hotplug_slot_info));
+ memcpy(hotplug->info, info, sizeof(struct hotplug_slot_info));
return 0;
}
static int __init pci_hotplug_init (void)
{
int result;
- struct kset *pci_bus_kset;
- pci_bus_kset = bus_get_kset(&pci_bus_type);
-
- pci_hotplug_slots_kset = kset_create_and_add("slots", NULL,
- &pci_bus_kset->kobj);
- if (!pci_hotplug_slots_kset) {
- result = -ENOMEM;
- err("Register subsys error\n");
- goto exit;
- }
result = cpci_hotplug_init(debug);
if (result) {
err ("cpci_hotplug_init with error %d\n", result);
- goto err_subsys;
+ goto err_cpci;
}
info (DRIVER_DESC " version: " DRIVER_VERSION "\n");
- goto exit;
-err_subsys:
- kset_unregister(pci_hotplug_slots_kset);
-exit:
+err_cpci:
return result;
}
static void __exit pci_hotplug_exit (void)
{
cpci_hotplug_exit();
- kset_unregister(pci_hotplug_slots_kset);
}
module_init(pci_hotplug_init);
module_param(debug, bool, 0644);
MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
-EXPORT_SYMBOL_GPL(pci_hotplug_slots_kset);
EXPORT_SYMBOL_GPL(pci_hp_register);
EXPORT_SYMBOL_GPL(pci_hp_deregister);
EXPORT_SYMBOL_GPL(pci_hp_change_slot_info);
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_address (struct hotplug_slot *slot, u32 *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);
.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,
};
dbg("Registering bus=%x dev=%x hp_slot=%x sun=%x "
"slot_device_offset=%x\n", slot->bus, slot->device,
slot->hp_slot, slot->number, ctrl->slot_device_offset);
- retval = pci_hp_register(hotplug_slot);
+ retval = pci_hp_register(hotplug_slot,
+ ctrl->pci_dev->subordinate,
+ slot->device);
if (retval) {
err("pci_hp_register failed with error %d\n", retval);
if (retval == -EEXIST)
}
/* create additional sysfs entries */
if (EMI(ctrl)) {
- retval = sysfs_create_file(&hotplug_slot->kobj,
+ retval = sysfs_create_file(&hotplug_slot->pci_slot->kobj,
&hotplug_slot_attr_lock.attr);
if (retval) {
pci_hp_deregister(hotplug_slot);
slot = list_entry(tmp, struct slot, slot_list);
list_del(&slot->slot_list);
if (EMI(ctrl))
- sysfs_remove_file(&slot->hotplug_slot->kobj,
+ sysfs_remove_file(&slot->hotplug_slot->pci_slot->kobj,
&hotplug_slot_attr_lock.attr);
cancel_delayed_work(&slot->work);
flush_scheduled_work();
return 0;
}
-static int get_address(struct hotplug_slot *hotplug_slot, u32 *value)
-{
- struct slot *slot = hotplug_slot->private;
- struct pci_bus *bus = slot->ctrl->pci_dev->subordinate;
-
- dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
-
- *value = (pci_domain_nr(bus) << 16) | (slot->bus << 8) | slot->device;
-
- return 0;
-}
-
-static int get_max_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
+static int get_max_bus_speed(struct hotplug_slot *hotplug_slot,
+ enum pci_bus_speed *value)
{
struct slot *slot = hotplug_slot->private;
int retval;
/* Setup the slot information structures */
rc = init_slots(ctrl);
if (rc) {
- err("%s: slot initialization failed\n", PCIE_MODULE_NAME);
+ if (rc == -EBUSY)
+ warn("%s: slot already registered by another "
+ "hotplug driver\n", PCIE_MODULE_NAME);
+ else
+ err("%s: slot initialization failed\n",
+ PCIE_MODULE_NAME);
goto err_out_release_ctlr;
}
*/
#include <linux/kobject.h>
#include <linux/string.h>
+#include <linux/pci.h>
#include <linux/pci_hotplug.h>
#include "rpadlpar.h"
+#include "../pci.h"
#define DLPAR_KOBJ_NAME "control"
#define MAX_DRC_NAME_LEN 64
-
static ssize_t add_slot_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t nbytes)
{
int error;
dlpar_kobj = kobject_create_and_add(DLPAR_KOBJ_NAME,
- &pci_hotplug_slots_kset->kobj);
+ &pci_slots_kset->kobj);
if (!dlpar_kobj)
return -EINVAL;
#include <asm/rtas.h>
#include "rpaphp.h"
-static ssize_t address_read_file (struct hotplug_slot *php_slot, char *buf)
-{
- int retval;
- struct slot *slot = (struct slot *)php_slot->private;
- struct pci_bus *bus;
-
- if (!slot)
- return -ENOENT;
-
- bus = slot->bus;
- if (!bus)
- return -ENOENT;
-
- if (bus->self)
- retval = sprintf(buf, pci_name(bus->self));
- else
- retval = sprintf(buf, "%04x:%02x:00.0",
- pci_domain_nr(bus), bus->number);
-
- return retval;
-}
-
-static struct hotplug_slot_attribute php_attr_address = {
- .attr = {.name = "address", .mode = S_IFREG | S_IRUGO},
- .show = address_read_file,
-};
-
/* free up the memory used by a slot */
static void rpaphp_release_slot(struct hotplug_slot *hotplug_slot)
{
list_del(&slot->rpaphp_slot_list);
- /* remove "address" file */
- sysfs_remove_file(&php_slot->kobj, &php_attr_address.attr);
-
retval = pci_hp_deregister(php_slot);
if (retval)
err("Problem unregistering a slot %s\n", slot->name);
{
struct hotplug_slot *php_slot = slot->hotplug_slot;
int retval;
+ int slotno;
dbg("%s registering slot:path[%s] index[%x], name[%s] pdomain[%x] type[%d]\n",
__func__, slot->dn->full_name, slot->index, slot->name,
return -EAGAIN;
}
- retval = pci_hp_register(php_slot);
+ if (slot->dn->child)
+ slotno = PCI_SLOT(PCI_DN(slot->dn->child)->devfn);
+ else
+ slotno = -1;
+ retval = pci_hp_register(php_slot, slot->bus, slotno);
if (retval) {
err("pci_hp_register failed with error %d\n", retval);
return retval;
}
- /* create "address" file */
- retval = sysfs_create_file(&php_slot->kobj, &php_attr_address.attr);
- if (retval) {
- err("sysfs_create_file failed with error %d\n", retval);
- goto sysfs_fail;
- }
-
/* add slot to our internal list */
list_add(&slot->rpaphp_slot_list, &rpaphp_slot_head);
info("Slot [%s] registered\n", slot->name);
static struct hotplug_slot * sn_hp_destroy(void)
{
struct slot *slot;
+ struct pci_slot *pci_slot;
struct hotplug_slot *bss_hotplug_slot = NULL;
list_for_each_entry(slot, &sn_hp_list, hp_list) {
bss_hotplug_slot = slot->hotplug_slot;
+ pci_slot = bss_hotplug_slot->pci_slot;
list_del(&((struct slot *)bss_hotplug_slot->private)->
hp_list);
- sysfs_remove_file(&bss_hotplug_slot->kobj,
+ sysfs_remove_file(&pci_slot->kobj,
&sn_slot_path_attr.attr);
break;
}
static int sn_hotplug_slot_register(struct pci_bus *pci_bus)
{
int device;
+ struct pci_slot *pci_slot;
struct hotplug_slot *bss_hotplug_slot;
int rc = 0;
bss_hotplug_slot->ops = &sn_hotplug_slot_ops;
bss_hotplug_slot->release = &sn_release_slot;
- rc = pci_hp_register(bss_hotplug_slot);
+ rc = pci_hp_register(bss_hotplug_slot, pci_bus, device);
if (rc)
goto register_err;
- rc = sysfs_create_file(&bss_hotplug_slot->kobj,
+ pci_slot = bss_hotplug_slot->pci_slot;
+ rc = sysfs_create_file(&pci_slot->kobj,
&sn_slot_path_attr.attr);
if (rc)
goto register_err;
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_address (struct hotplug_slot *slot, u32 *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);
.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,
};
dbg("Registering bus=%x dev=%x hp_slot=%x sun=%x "
"slot_device_offset=%x\n", slot->bus, slot->device,
slot->hp_slot, slot->number, ctrl->slot_device_offset);
- retval = pci_hp_register(slot->hotplug_slot);
+ retval = pci_hp_register(slot->hotplug_slot,
+ ctrl->pci_dev->subordinate, slot->device);
if (retval) {
err("pci_hp_register failed with error %d\n", retval);
if (retval == -EEXIST)
return 0;
}
-static int get_address (struct hotplug_slot *hotplug_slot, u32 *value)
-{
- struct slot *slot = get_slot(hotplug_slot);
- struct pci_bus *bus = slot->ctrl->pci_dev->subordinate;
-
- dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name);
-
- *value = (pci_domain_nr(bus) << 16) | (slot->bus << 8) | slot->device;
-
- return 0;
-}
-
-static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
+static int get_max_bus_speed(struct hotplug_slot *hotplug_slot,
+ enum pci_bus_speed *value)
{
struct slot *slot = get_slot(hotplug_slot);
int retval;
}
struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev);
+
+/* PCI slot sysfs helper code */
+#define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
+
+extern struct kset *pci_slots_kset;
+
+struct pci_slot_attribute {
+ struct attribute attr;
+ ssize_t (*show)(struct pci_slot *, char *);
+ ssize_t (*store)(struct pci_slot *, const char *, size_t);
+};
+#define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
+
INIT_LIST_HEAD(&b->node);
INIT_LIST_HEAD(&b->children);
INIT_LIST_HEAD(&b->devices);
+ INIT_LIST_HEAD(&b->slots);
}
return b;
}
--- /dev/null
+/*
+ * drivers/pci/slot.c
+ * Copyright (C) 2006 Matthew Wilcox <matthew@wil.cx>
+ * Copyright (C) 2006-2008 Hewlett-Packard Development Company, L.P.
+ * Alex Chiang <achiang@hp.com>
+ */
+
+#include <linux/kobject.h>
+#include <linux/pci.h>
+#include <linux/err.h>
+#include "pci.h"
+
+struct kset *pci_slots_kset;
+EXPORT_SYMBOL_GPL(pci_slots_kset);
+
+static ssize_t pci_slot_attr_show(struct kobject *kobj,
+ struct attribute *attr, char *buf)
+{
+ struct pci_slot *slot = to_pci_slot(kobj);
+ struct pci_slot_attribute *attribute = to_pci_slot_attr(attr);
+ return attribute->show ? attribute->show(slot, buf) : -EIO;
+}
+
+static ssize_t pci_slot_attr_store(struct kobject *kobj,
+ struct attribute *attr, const char *buf, size_t len)
+{
+ struct pci_slot *slot = to_pci_slot(kobj);
+ struct pci_slot_attribute *attribute = to_pci_slot_attr(attr);
+ return attribute->store ? attribute->store(slot, buf, len) : -EIO;
+}
+
+static struct sysfs_ops pci_slot_sysfs_ops = {
+ .show = pci_slot_attr_show,
+ .store = pci_slot_attr_store,
+};
+
+static ssize_t address_read_file(struct pci_slot *slot, char *buf)
+{
+ if (slot->number == 0xff)
+ return sprintf(buf, "%04x:%02x\n",
+ pci_domain_nr(slot->bus),
+ slot->bus->number);
+ else
+ return sprintf(buf, "%04x:%02x:%02x\n",
+ pci_domain_nr(slot->bus),
+ slot->bus->number,
+ slot->number);
+}
+
+static void pci_slot_release(struct kobject *kobj)
+{
+ struct pci_slot *slot = to_pci_slot(kobj);
+
+ pr_debug("%s: releasing pci_slot on %x:%d\n", __func__,
+ slot->bus->number, slot->number);
+
+ list_del(&slot->list);
+
+ kfree(slot);
+}
+
+static struct pci_slot_attribute pci_slot_attr_address =
+ __ATTR(address, (S_IFREG | S_IRUGO), address_read_file, NULL);
+
+static struct attribute *pci_slot_default_attrs[] = {
+ &pci_slot_attr_address.attr,
+ NULL,
+};
+
+static struct kobj_type pci_slot_ktype = {
+ .sysfs_ops = &pci_slot_sysfs_ops,
+ .release = &pci_slot_release,
+ .default_attrs = pci_slot_default_attrs,
+};
+
+/**
+ * pci_create_slot - create or increment refcount for physical PCI slot
+ * @parent: struct pci_bus of parent bridge
+ * @slot_nr: PCI_SLOT(pci_dev->devfn) or -1 for placeholder
+ * @name: user visible string presented in /sys/bus/pci/slots/<name>
+ *
+ * PCI slots have first class attributes such as address, speed, width,
+ * and a &struct pci_slot is used to manage them. This interface will
+ * either return a new &struct pci_slot to the caller, or if the pci_slot
+ * already exists, its refcount will be incremented.
+ *
+ * Slots are uniquely identified by a @pci_bus, @slot_nr, @name tuple.
+ *
+ * Placeholder slots:
+ * In most cases, @pci_bus, @slot_nr will be sufficient to uniquely identify
+ * a slot. There is one notable exception - pSeries (rpaphp), where the
+ * @slot_nr cannot be determined until a device is actually inserted into
+ * the slot. In this scenario, the caller may pass -1 for @slot_nr.
+ *
+ * The following semantics are imposed when the caller passes @slot_nr ==
+ * -1. First, the check for existing %struct pci_slot is skipped, as the
+ * caller may know about several unpopulated slots on a given %struct
+ * pci_bus, and each slot would have a @slot_nr of -1. Uniqueness for
+ * these slots is then determined by the @name parameter. We expect
+ * kobject_init_and_add() to warn us if the caller attempts to create
+ * multiple slots with the same name. The other change in semantics is
+ * user-visible, which is the 'address' parameter presented in sysfs will
+ * consist solely of a dddd:bb tuple, where dddd is the PCI domain of the
+ * %struct pci_bus and bb is the bus number. In other words, the devfn of
+ * the 'placeholder' slot will not be displayed.
+ */
+
+struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
+ const char *name)
+{
+ struct pci_slot *slot;
+ int err;
+
+ down_write(&pci_bus_sem);
+
+ if (slot_nr == -1)
+ goto placeholder;
+
+ /* If we've already created this slot, bump refcount and return. */
+ list_for_each_entry(slot, &parent->slots, list) {
+ if (slot->number == slot_nr) {
+ kobject_get(&slot->kobj);
+ pr_debug("%s: inc refcount to %d on %04x:%02x:%02x\n",
+ __func__,
+ atomic_read(&slot->kobj.kref.refcount),
+ pci_domain_nr(parent), parent->number,
+ slot_nr);
+ goto out;
+ }
+ }
+
+placeholder:
+ slot = kzalloc(sizeof(*slot), GFP_KERNEL);
+ if (!slot) {
+ slot = ERR_PTR(-ENOMEM);
+ goto out;
+ }
+
+ slot->bus = parent;
+ slot->number = slot_nr;
+
+ slot->kobj.kset = pci_slots_kset;
+ err = kobject_init_and_add(&slot->kobj, &pci_slot_ktype, NULL,
+ "%s", name);
+ if (err) {
+ printk(KERN_ERR "Unable to register kobject %s\n", name);
+ goto err;
+ }
+
+ INIT_LIST_HEAD(&slot->list);
+ list_add(&slot->list, &parent->slots);
+
+ /* Don't care if debug printk has a -1 for slot_nr */
+ pr_debug("%s: created pci_slot on %04x:%02x:%02x\n",
+ __func__, pci_domain_nr(parent), parent->number, slot_nr);
+
+ out:
+ up_write(&pci_bus_sem);
+ return slot;
+ err:
+ kfree(slot);
+ slot = ERR_PTR(err);
+ goto out;
+}
+EXPORT_SYMBOL_GPL(pci_create_slot);
+
+/**
+ * pci_update_slot_number - update %struct pci_slot -> number
+ * @slot - %struct pci_slot to update
+ * @slot_nr - new number for slot
+ *
+ * The primary purpose of this interface is to allow callers who earlier
+ * created a placeholder slot in pci_create_slot() by passing a -1 as
+ * slot_nr, to update their %struct pci_slot with the correct @slot_nr.
+ */
+
+void pci_update_slot_number(struct pci_slot *slot, int slot_nr)
+{
+ int name_count = 0;
+ struct pci_slot *tmp;
+
+ down_write(&pci_bus_sem);
+
+ list_for_each_entry(tmp, &slot->bus->slots, list) {
+ WARN_ON(tmp->number == slot_nr);
+ if (!strcmp(kobject_name(&tmp->kobj), kobject_name(&slot->kobj)))
+ name_count++;
+ }
+
+ if (name_count > 1)
+ printk(KERN_WARNING "pci_update_slot_number found %d slots with the same name: %s\n", name_count, kobject_name(&slot->kobj));
+
+ slot->number = slot_nr;
+ up_write(&pci_bus_sem);
+}
+EXPORT_SYMBOL_GPL(pci_update_slot_number);
+
+/**
+ * pci_destroy_slot - decrement refcount for physical PCI slot
+ * @slot: struct pci_slot to decrement
+ *
+ * %struct pci_slot is refcounted, so destroying them is really easy; we
+ * just call kobject_put on its kobj and let our release methods do the
+ * rest.
+ */
+
+void pci_destroy_slot(struct pci_slot *slot)
+{
+ pr_debug("%s: dec refcount to %d on %04x:%02x:%02x\n", __func__,
+ atomic_read(&slot->kobj.kref.refcount) - 1,
+ pci_domain_nr(slot->bus), slot->bus->number, slot->number);
+
+ down_write(&pci_bus_sem);
+ kobject_put(&slot->kobj);
+ up_write(&pci_bus_sem);
+}
+EXPORT_SYMBOL_GPL(pci_destroy_slot);
+
+static int pci_slot_init(void)
+{
+ struct kset *pci_bus_kset;
+
+ pci_bus_kset = bus_get_kset(&pci_bus_type);
+ pci_slots_kset = kset_create_and_add("slots", NULL,
+ &pci_bus_kset->kobj);
+ if (!pci_slots_kset) {
+ printk(KERN_ERR "PCI: Slot initialization failure\n");
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+subsys_initcall(pci_slot_init);
#ifndef LINUX_PCI_H
#define LINUX_PCI_H
-/* Include the pci register defines */
-#include <linux/pci_regs.h>
+#include <linux/pci_regs.h> /* The pci register defines */
/*
* The PCI interface treats multi-function devices as independent
#include <linux/list.h>
#include <linux/compiler.h>
#include <linux/errno.h>
+#include <linux/kobject.h>
#include <asm/atomic.h>
#include <linux/device.h>
/* Include the ID list */
#include <linux/pci_ids.h>
+/* pci_slot represents a physical slot */
+struct pci_slot {
+ struct pci_bus *bus; /* The bus this slot is on */
+ struct list_head list; /* node in list of slots on this bus */
+ struct hotplug_slot *hotplug; /* Hotplug info (migrate over time) */
+ unsigned char number; /* PCI_SLOT(pci_dev->devfn) */
+ struct kobject kobj;
+};
+
/* File state for mmap()s on /proc/bus/pci/X/Y */
enum pci_mmap_state {
pci_mmap_io,
void *sysdata; /* hook for sys-specific extension */
struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
+ struct pci_slot *slot; /* Physical slot this device is in */
unsigned int devfn; /* encoded device & function index */
unsigned short vendor;
struct list_head children; /* list of child buses */
struct list_head devices; /* list of devices on this bus */
struct pci_dev *self; /* bridge device as seen by parent */
+ struct list_head slots; /* list of slots on this bus */
struct resource *resource[PCI_BUS_NUM_RESOURCES];
/* address space routed to this bus */
struct pci_ops *ops, void *sysdata);
struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
int busnr);
+struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
+ const char *name);
+void pci_destroy_slot(struct pci_slot *slot);
+void pci_update_slot_number(struct pci_slot *slot, int slot_nr);
int pci_scan_slot(struct pci_bus *bus, int devfn);
struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
* @get_adapter_status: Called to get see if an adapter is present in the slot or not.
* If this field is NULL, the value passed in the struct hotplug_slot_info
* will be used when this value is requested by a user.
- * @get_address: Called to get pci address of a slot.
- * If this field is NULL, the value passed in the struct hotplug_slot_info
- * will be used when this value is requested by a user.
* @get_max_bus_speed: Called to get the max bus speed for a slot.
* If this field is NULL, the value passed in the struct hotplug_slot_info
* will be used when this value is requested by a user.
int (*get_attention_status) (struct hotplug_slot *slot, u8 *value);
int (*get_latch_status) (struct hotplug_slot *slot, u8 *value);
int (*get_adapter_status) (struct hotplug_slot *slot, u8 *value);
- int (*get_address) (struct hotplug_slot *slot, u32 *value);
int (*get_max_bus_speed) (struct hotplug_slot *slot, enum pci_bus_speed *value);
int (*get_cur_bus_speed) (struct hotplug_slot *slot, enum pci_bus_speed *value);
};
u8 attention_status;
u8 latch_status;
u8 adapter_status;
- u32 address;
enum pci_bus_speed max_bus_speed;
enum pci_bus_speed cur_bus_speed;
};
/* Variables below this are for use only by the hotplug pci core. */
struct list_head slot_list;
- struct kobject kobj;
+ struct pci_slot *pci_slot;
};
#define to_hotplug_slot(n) container_of(n, struct hotplug_slot, kobj)
-extern int pci_hp_register (struct hotplug_slot *slot);
-extern int pci_hp_deregister (struct hotplug_slot *slot);
+extern int pci_hp_register(struct hotplug_slot *, struct pci_bus *, int nr);
+extern int pci_hp_deregister(struct hotplug_slot *slot);
extern int __must_check pci_hp_change_slot_info (struct hotplug_slot *slot,
struct hotplug_slot_info *info);
-extern struct kset *pci_hotplug_slots_kset;
/* PCI Setting Record (Type 0) */
struct hpp_type0 {
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