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path: root/drivers/pci/setup-res.c
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Diffstat (limited to 'drivers/pci/setup-res.c')
-rw-r--r--drivers/pci/setup-res.c120
1 files changed, 37 insertions, 83 deletions
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index c6d933ddfd46..e5fcadfc58b0 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -29,7 +29,7 @@ static void pci_std_update_resource(struct pci_dev *dev, int resno)
u16 cmd;
u32 new, check, mask;
int reg;
- struct resource *res = dev->resource + resno;
+ struct resource *res = pci_resource_n(dev, resno);
const char *res_name = pci_resource_name(dev, resno);
/* Per SR-IOV spec 3.4.1.11, VF BARs are RO zero */
@@ -127,10 +127,8 @@ void pci_update_resource(struct pci_dev *dev, int resno)
{
if (resno <= PCI_ROM_RESOURCE)
pci_std_update_resource(dev, resno);
-#ifdef CONFIG_PCI_IOV
- else if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END)
+ else if (pci_resource_is_iov(resno))
pci_iov_update_resource(dev, resno);
-#endif
}
int pci_claim_resource(struct pci_dev *dev, int resource)
@@ -211,8 +209,7 @@ static int pci_revert_fw_address(struct resource *res, struct pci_dev *dev,
start = res->start;
end = res->end;
- res->start = fw_addr;
- res->end = res->start + size - 1;
+ resource_set_range(res, fw_addr, size);
res->flags &= ~IORESOURCE_UNSET;
root = pci_find_parent_resource(dev, res);
@@ -263,7 +260,7 @@ resource_size_t __weak pcibios_align_resource(void *data,
static int __pci_assign_resource(struct pci_bus *bus, struct pci_dev *dev,
int resno, resource_size_t size, resource_size_t align)
{
- struct resource *res = dev->resource + resno;
+ struct resource *res = pci_resource_n(dev, resno);
resource_size_t min;
int ret;
@@ -326,7 +323,7 @@ static int _pci_assign_resource(struct pci_dev *dev, int resno,
int pci_assign_resource(struct pci_dev *dev, int resno)
{
- struct resource *res = dev->resource + resno;
+ struct resource *res = pci_resource_n(dev, resno);
const char *res_name = pci_resource_name(dev, resno);
resource_size_t align, size;
int ret;
@@ -362,6 +359,9 @@ int pci_assign_resource(struct pci_dev *dev, int resno)
res->flags &= ~IORESOURCE_UNSET;
res->flags &= ~IORESOURCE_STARTALIGN;
+ if (resno >= PCI_BRIDGE_RESOURCES && resno <= PCI_BRIDGE_RESOURCE_END)
+ res->flags &= ~IORESOURCE_DISABLED;
+
pci_info(dev, "%s %pR: assigned\n", res_name, res);
if (resno < PCI_BRIDGE_RESOURCES)
pci_update_resource(dev, resno);
@@ -373,7 +373,7 @@ EXPORT_SYMBOL(pci_assign_resource);
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;
+ struct resource *res = pci_resource_n(dev, resno);
const char *res_name = pci_resource_name(dev, resno);
unsigned long flags;
resource_size_t new_size;
@@ -390,7 +390,6 @@ int pci_reassign_resource(struct pci_dev *dev, int resno,
return -EINVAL;
}
- /* already aligned with min_align */
new_size = resource_size(res) + addsize;
ret = _pci_assign_resource(dev, resno, new_size, min_align);
if (ret) {
@@ -410,75 +409,27 @@ int pci_reassign_resource(struct pci_dev *dev, int resno,
return 0;
}
-void pci_release_resource(struct pci_dev *dev, int resno)
+int pci_release_resource(struct pci_dev *dev, int resno)
{
- struct resource *res = dev->resource + resno;
+ struct resource *res = pci_resource_n(dev, resno);
const char *res_name = pci_resource_name(dev, resno);
-
- pci_info(dev, "%s %pR: releasing\n", res_name, res);
+ int ret;
if (!res->parent)
- return;
-
- release_resource(res);
- res->end = resource_size(res) - 1;
- res->start = 0;
- res->flags |= IORESOURCE_UNSET;
-}
-EXPORT_SYMBOL(pci_release_resource);
-
-int pci_resize_resource(struct pci_dev *dev, int resno, int size)
-{
- struct resource *res = dev->resource + resno;
- struct pci_host_bridge *host;
- int old, ret;
- u32 sizes;
- u16 cmd;
-
- /* Check if we must preserve the firmware's resource assignment */
- host = pci_find_host_bridge(dev->bus);
- if (host->preserve_config)
- return -ENOTSUPP;
-
- /* Make sure the resource isn't assigned before resizing it. */
- if (!(res->flags & IORESOURCE_UNSET))
- return -EBUSY;
-
- pci_read_config_word(dev, PCI_COMMAND, &cmd);
- if (cmd & PCI_COMMAND_MEMORY)
- return -EBUSY;
-
- sizes = pci_rebar_get_possible_sizes(dev, resno);
- if (!sizes)
- return -ENOTSUPP;
-
- if (!(sizes & BIT(size)))
- return -EINVAL;
+ return 0;
- old = pci_rebar_get_current_size(dev, resno);
- if (old < 0)
- return old;
+ pci_info(dev, "%s %pR: releasing\n", res_name, res);
- ret = pci_rebar_set_size(dev, resno, size);
+ ret = release_resource(res);
if (ret)
return ret;
+ res->end = resource_size(res) - 1;
+ res->start = 0;
+ res->flags |= IORESOURCE_UNSET;
- res->end = res->start + pci_rebar_size_to_bytes(size) - 1;
-
- /* Check if the new config works by trying to assign everything. */
- if (dev->bus->self) {
- ret = pci_reassign_bridge_resources(dev->bus->self, res->flags);
- if (ret)
- goto error_resize;
- }
return 0;
-
-error_resize:
- pci_rebar_set_size(dev, resno, old);
- res->end = res->start + pci_rebar_size_to_bytes(old) - 1;
- return ret;
}
-EXPORT_SYMBOL(pci_resize_resource);
+EXPORT_SYMBOL(pci_release_resource);
int pci_enable_resources(struct pci_dev *dev, int mask)
{
@@ -498,26 +449,29 @@ int pci_enable_resources(struct pci_dev *dev, int mask)
if (!(r->flags & (IORESOURCE_IO | IORESOURCE_MEM)))
continue;
- if ((i == PCI_ROM_RESOURCE) &&
- (!(r->flags & IORESOURCE_ROM_ENABLE)))
+ if (pci_resource_is_optional(dev, i))
continue;
- if (r->flags & IORESOURCE_UNSET) {
- pci_err(dev, "%s %pR: not assigned; can't enable device\n",
- r_name, r);
- return -EINVAL;
+ if (i < PCI_BRIDGE_RESOURCES) {
+ if (r->flags & IORESOURCE_UNSET) {
+ pci_err(dev, "%s %pR: not assigned; can't enable device\n",
+ r_name, r);
+ return -EINVAL;
+ }
+
+ if (!r->parent) {
+ pci_err(dev, "%s %pR: not claimed; can't enable device\n",
+ r_name, r);
+ return -EINVAL;
+ }
}
- if (!r->parent) {
- pci_err(dev, "%s %pR: not claimed; can't enable device\n",
- r_name, r);
- return -EINVAL;
+ if (r->parent) {
+ if (r->flags & IORESOURCE_IO)
+ cmd |= PCI_COMMAND_IO;
+ if (r->flags & IORESOURCE_MEM)
+ cmd |= PCI_COMMAND_MEMORY;
}
-
- if (r->flags & IORESOURCE_IO)
- cmd |= PCI_COMMAND_IO;
- if (r->flags & IORESOURCE_MEM)
- cmd |= PCI_COMMAND_MEMORY;
}
if (cmd != old_cmd) {
generated by cgit (git 2.34.1) at 2025-12-22 04:56:17 +0000