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Subject[PATCH 3/13 v7] PCI: define PCI resource names in an 'enum'
This patch moves all definitions of the PCI resource names to an 'enum',
and also replaces some hard-coded resource variables with symbol
names. This change eases introduction of device specific resources.

Signed-off-by: Yu Zhao <yu.zhao@intel.com>

---
drivers/pci/pci-sysfs.c | 4 +++-
drivers/pci/probe.c | 2 +-
drivers/pci/proc.c | 7 ++++---
include/linux/pci.h | 37 ++++++++++++++++++++++++-------------
4 files changed, 32 insertions(+), 18 deletions(-)
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 5d72866..0d74851 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -101,11 +101,13 @@ resource_show(struct device * dev, struct device_attribute *attr, char * buf)
struct pci_dev * pci_dev = to_pci_dev(dev);
char * str = buf;
int i;
- int max = 7;
+ int max;
resource_size_t start, end;

if (pci_dev->subordinate)
max = DEVICE_COUNT_RESOURCE;
+ else
+ max = PCI_BRIDGE_RESOURCES;

for (i = 0; i < max; i++) {
struct resource *res = &pci_dev->resource[i];
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 003a9b3..4c5429f 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -423,7 +423,7 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent,
child->subordinate = 0xff;

/* Set up default resource pointers and names.. */
- for (i = 0; i < 4; i++) {
+ for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) {
child->resource[i] = &bridge->resource[PCI_BRIDGE_RESOURCES+i];
child->resource[i]->name = child->name;
}
diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c
index e1098c3..f6f2a59 100644
--- a/drivers/pci/proc.c
+++ b/drivers/pci/proc.c
@@ -352,15 +352,16 @@ static int show_device(struct seq_file *m, void *v)
dev->vendor,
dev->device,
dev->irq);
- /* Here should be 7 and not PCI_NUM_RESOURCES as we need to preserve compatibility */
- for (i=0; i<7; i++) {
+
+ /* only print standard and ROM resources to preserve compatibility */
+ for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
resource_size_t start, end;
pci_resource_to_user(dev, i, &dev->resource[i], &start, &end);
seq_printf(m, "\t%16llx",
(unsigned long long)(start |
(dev->resource[i].flags & PCI_REGION_FLAG_MASK)));
}
- for (i=0; i<7; i++) {
+ for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
resource_size_t start, end;
pci_resource_to_user(dev, i, &dev->resource[i], &start, &end);
seq_printf(m, "\t%16llx",
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 7e7ff03..d455ec8 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -82,7 +82,30 @@ enum pci_mmap_state {
#define PCI_DMA_FROMDEVICE 2
#define PCI_DMA_NONE 3

-#define DEVICE_COUNT_RESOURCE 12
+/*
+ * For PCI devices, the region numbers are assigned this way:
+ */
+enum {
+ /* #0-5: standard PCI resources */
+ PCI_STD_RESOURCES,
+ PCI_STD_RESOURCE_END = 5,
+
+ /* #6: expansion ROM resource */
+ PCI_ROM_RESOURCE,
+
+ /* resources assigned to buses behind the bridge */
+#define PCI_BRIDGE_RESOURCE_NUM 4
+
+ PCI_BRIDGE_RESOURCES,
+ PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES +
+ PCI_BRIDGE_RESOURCE_NUM - 1,
+
+ /* total resources associated with a PCI device */
+ PCI_NUM_RESOURCES,
+
+ /* preserve this for compatibility */
+ DEVICE_COUNT_RESOURCE
+};

typedef int __bitwise pci_power_t;

@@ -268,18 +291,6 @@ static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
}

-/*
- * For PCI devices, the region numbers are assigned this way:
- *
- * 0-5 standard PCI regions
- * 6 expansion ROM
- * 7-10 bridges: address space assigned to buses behind the bridge
- */
-
-#define PCI_ROM_RESOURCE 6
-#define PCI_BRIDGE_RESOURCES 7
-#define PCI_NUM_RESOURCES 11
-
#ifndef PCI_BUS_NUM_RESOURCES
#define PCI_BUS_NUM_RESOURCES 16
#endif
--
1.5.6.4


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