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[PATCH] PCI: MSI(X) save/restore for suspend/resume

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Add MSI(X) configure sapce save/restore in generic PCI helper.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Shaohua Li 2006-02-08 17:11:38 +08:00 • committed by Greg Kroah-Hartman
parent f043ca43c1
commit 41017f0cac
4 changed files with 246 additions and 29 deletions
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31
include/linux/pci.h
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@ -100,6 +100,12 @@ enum pci_bus_flags {
PCI_BUS_FLAGS_NO_MSI = (pci_bus_flags_t) 1,
};
struct pci_cap_saved_state {
struct hlist_node next;
char cap_nr;
u32 data[0];
};
/*
* The pci_dev structure is used to describe PCI devices.
*/
@ -159,6 +165,7 @@ struct pci_dev {
unsigned int block_ucfg_access:1; /* userspace config space access is blocked */
u32 saved_config_space[16]; /* config space saved at suspend time */
struct hlist_head saved_cap_space;
struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
int rom_attr_enabled; /* has display of the rom attribute been enabled? */
struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
@ -169,6 +176,30 @@ struct pci_dev {
#define to_pci_dev(n) container_of(n, struct pci_dev, dev)
#define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
static inline struct pci_cap_saved_state *pci_find_saved_cap(
struct pci_dev *pci_dev,char cap)
{
struct pci_cap_saved_state *tmp;
struct hlist_node *pos;
hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
if (tmp->cap_nr == cap)
return tmp;
}
return NULL;
}
static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
struct pci_cap_saved_state *new_cap)
{
hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
}
static inline void pci_remove_saved_cap(struct pci_cap_saved_state *cap)
{
hlist_del(&cap->next);
}
/*
* For PCI devices, the region numbers are assigned this way:
*