[PATCH] PCI: MSI(X) save/restore for suspend/resume
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>
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 0aad5a3..15e1675 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -100,6 +100,12 @@
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 @@
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 @@
#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:
*