summaryrefslogtreecommitdiffstats
path: root/drivers/pci/setup-res.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/pci/setup-res.c')
-rw-r--r--drivers/pci/setup-res.c155
1 files changed, 96 insertions, 59 deletions
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index bc0e6eea0fff..51a9095c7da4 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -74,8 +74,7 @@ void pci_update_resource(struct pci_dev *dev, int resno)
resno, new, check);
}
- if ((new & (PCI_BASE_ADDRESS_SPACE|PCI_BASE_ADDRESS_MEM_TYPE_MASK)) ==
- (PCI_BASE_ADDRESS_SPACE_MEMORY|PCI_BASE_ADDRESS_MEM_TYPE_64)) {
+ if (res->flags & IORESOURCE_MEM_64) {
new = region.start >> 16 >> 16;
pci_write_config_dword(dev, reg + 4, new);
pci_read_config_dword(dev, reg + 4, &check);
@@ -129,16 +128,16 @@ void pci_disable_bridge_window(struct pci_dev *dev)
}
#endif /* CONFIG_PCI_QUIRKS */
+
+
static int __pci_assign_resource(struct pci_bus *bus, struct pci_dev *dev,
- int resno)
+ int resno, resource_size_t size, resource_size_t align)
{
struct resource *res = dev->resource + resno;
- resource_size_t size, min, align;
+ resource_size_t min;
int ret;
- size = resource_size(res);
min = (res->flags & IORESOURCE_IO) ? PCIBIOS_MIN_IO : PCIBIOS_MIN_MEM;
- align = pci_resource_alignment(dev, res);
/* First, try exact prefetching match.. */
ret = pci_bus_alloc_resource(bus, res, size, align, min,
@@ -155,56 +154,101 @@ static int __pci_assign_resource(struct pci_bus *bus, struct pci_dev *dev,
ret = pci_bus_alloc_resource(bus, res, size, align, min, 0,
pcibios_align_resource, dev);
}
+ return ret;
+}
- if (ret < 0 && dev->fw_addr[resno]) {
- struct resource *root, *conflict;
- resource_size_t start, end;
+static int pci_revert_fw_address(struct resource *res, struct pci_dev *dev,
+ int resno, resource_size_t size)
+{
+ struct resource *root, *conflict;
+ resource_size_t start, end;
+ int ret = 0;
- /*
- * If we failed to assign anything, let's try the address
- * where firmware left it. That at least has a chance of
- * working, which is better than just leaving it disabled.
- */
+ if (res->flags & IORESOURCE_IO)
+ root = &ioport_resource;
+ else
+ root = &iomem_resource;
+
+ start = res->start;
+ end = res->end;
+ res->start = dev->fw_addr[resno];
+ res->end = res->start + size - 1;
+ dev_info(&dev->dev, "BAR %d: trying firmware assignment %pR\n",
+ resno, res);
+ conflict = request_resource_conflict(root, res);
+ if (conflict) {
+ dev_info(&dev->dev,
+ "BAR %d: %pR conflicts with %s %pR\n", resno,
+ res, conflict->name, conflict);
+ res->start = start;
+ res->end = end;
+ ret = 1;
+ }
+ return ret;
+}
+
+static int _pci_assign_resource(struct pci_dev *dev, int resno, int size, resource_size_t min_align)
+{
+ struct resource *res = dev->resource + resno;
+ struct pci_bus *bus;
+ int ret;
+ char *type;
- if (res->flags & IORESOURCE_IO)
- root = &ioport_resource;
+ bus = dev->bus;
+ while ((ret = __pci_assign_resource(bus, dev, resno, size, min_align))) {
+ if (!bus->parent || !bus->self->transparent)
+ break;
+ bus = bus->parent;
+ }
+
+ if (ret) {
+ if (res->flags & IORESOURCE_MEM)
+ if (res->flags & IORESOURCE_PREFETCH)
+ type = "mem pref";
+ else
+ type = "mem";
+ else if (res->flags & IORESOURCE_IO)
+ type = "io";
else
- root = &iomem_resource;
-
- start = res->start;
- end = res->end;
- res->start = dev->fw_addr[resno];
- res->end = res->start + size - 1;
- dev_info(&dev->dev, "BAR %d: trying firmware assignment %pR\n",
- resno, res);
- conflict = request_resource_conflict(root, res);
- if (conflict) {
- dev_info(&dev->dev,
- "BAR %d: %pR conflicts with %s %pR\n", resno,
- res, conflict->name, conflict);
- res->start = start;
- res->end = end;
- } else
- ret = 0;
+ type = "unknown";
+ dev_info(&dev->dev,
+ "BAR %d: can't assign %s (size %#llx)\n",
+ resno, type, (unsigned long long) resource_size(res));
}
+ return ret;
+}
+
+int pci_reassign_resource(struct pci_dev *dev, int resno, resource_size_t addsize,
+ resource_size_t min_align)
+{
+ struct resource *res = dev->resource + resno;
+ resource_size_t new_size;
+ int ret;
+
+ if (!res->parent) {
+ dev_info(&dev->dev, "BAR %d: can't reassign an unassigned resouce %pR "
+ "\n", resno, res);
+ return -EINVAL;
+ }
+
+ new_size = resource_size(res) + addsize + min_align;
+ ret = _pci_assign_resource(dev, resno, new_size, min_align);
if (!ret) {
res->flags &= ~IORESOURCE_STARTALIGN;
dev_info(&dev->dev, "BAR %d: assigned %pR\n", resno, res);
if (resno < PCI_BRIDGE_RESOURCES)
pci_update_resource(dev, resno);
}
-
return ret;
}
int pci_assign_resource(struct pci_dev *dev, int resno)
{
struct resource *res = dev->resource + resno;
- resource_size_t align;
+ resource_size_t align, size;
struct pci_bus *bus;
int ret;
- char *type;
align = pci_resource_alignment(dev, res);
if (!align) {
@@ -214,34 +258,27 @@ int pci_assign_resource(struct pci_dev *dev, int resno)
}
bus = dev->bus;
- while ((ret = __pci_assign_resource(bus, dev, resno))) {
- if (bus->parent && bus->self->transparent)
- bus = bus->parent;
- else
- bus = NULL;
- if (bus)
- continue;
- break;
- }
+ size = resource_size(res);
+ ret = _pci_assign_resource(dev, resno, size, align);
- if (ret) {
- if (res->flags & IORESOURCE_MEM)
- if (res->flags & IORESOURCE_PREFETCH)
- type = "mem pref";
- else
- type = "mem";
- else if (res->flags & IORESOURCE_IO)
- type = "io";
- else
- type = "unknown";
- dev_info(&dev->dev,
- "BAR %d: can't assign %s (size %#llx)\n",
- resno, type, (unsigned long long) resource_size(res));
- }
+ /*
+ * If we failed to assign anything, let's try the address
+ * where firmware left it. That at least has a chance of
+ * working, which is better than just leaving it disabled.
+ */
+ if (ret < 0 && dev->fw_addr[resno])
+ ret = pci_revert_fw_address(res, dev, resno, size);
+ if (!ret) {
+ res->flags &= ~IORESOURCE_STARTALIGN;
+ dev_info(&dev->dev, "BAR %d: assigned %pR\n", resno, res);
+ if (resno < PCI_BRIDGE_RESOURCES)
+ pci_update_resource(dev, resno);
+ }
return ret;
}
+
/* Sort resources by alignment */
void pdev_sort_resources(struct pci_dev *dev, struct resource_list *head)
{
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-17 21:02:33 +0100