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-rw-r--r--drivers/pci/bus.c3
-rw-r--r--drivers/pci/pci-sysfs.c7
-rw-r--r--drivers/pci/probe.c25
-rw-r--r--drivers/pci/setup-bus.c89
-rw-r--r--drivers/pci/setup-res.c3
5 files changed, 90 insertions, 37 deletions
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index b77fd30bbfd9..58b5388423ee 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -204,6 +204,9 @@ static int pci_bus_alloc_from_region(struct pci_bus *bus, struct resource *res,
if (!r)
continue;
+ if (r->flags & (IORESOURCE_UNSET|IORESOURCE_DISABLED))
+ continue;
+
/* type_mask must match */
if ((res->flags ^ r->flags) & type_mask)
continue;
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 5eea14c1f7f5..162a5241c7f7 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -177,6 +177,13 @@ static ssize_t resource_show(struct device *dev, struct device_attribute *attr,
for (i = 0; i < max; i++) {
struct resource *res = &pci_dev->resource[i];
+ struct resource zerores = {};
+
+ /* For backwards compatibility */
+ if (i >= PCI_BRIDGE_RESOURCES && i <= PCI_BRIDGE_RESOURCE_END &&
+ res->flags & (IORESOURCE_UNSET | IORESOURCE_DISABLED))
+ res = &zerores;
+
pci_resource_to_user(pci_dev, i, res, &start, &end);
len += sysfs_emit_at(buf, len, "0x%016llx 0x%016llx 0x%016llx\n",
(unsigned long long)start,
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index f41128f91ca7..f31d27c7708a 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -419,13 +419,17 @@ static void pci_read_bridge_io(struct pci_dev *dev, struct resource *res,
limit |= ((unsigned long) io_limit_hi << 16);
}
+ res->flags = (io_base_lo & PCI_IO_RANGE_TYPE_MASK) | IORESOURCE_IO;
+
if (base <= limit) {
- res->flags = (io_base_lo & PCI_IO_RANGE_TYPE_MASK) | IORESOURCE_IO;
region.start = base;
region.end = limit + io_granularity - 1;
pcibios_bus_to_resource(dev->bus, res, &region);
if (log)
pci_info(dev, " bridge window %pR\n", res);
+ } else {
+ resource_set_range(res, 0, 0);
+ res->flags |= IORESOURCE_UNSET | IORESOURCE_DISABLED;
}
}
@@ -440,13 +444,18 @@ static void pci_read_bridge_mmio(struct pci_dev *dev, struct resource *res,
pci_read_config_word(dev, PCI_MEMORY_LIMIT, &mem_limit_lo);
base = ((unsigned long) mem_base_lo & PCI_MEMORY_RANGE_MASK) << 16;
limit = ((unsigned long) mem_limit_lo & PCI_MEMORY_RANGE_MASK) << 16;
+
+ res->flags = (mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | IORESOURCE_MEM;
+
if (base <= limit) {
- res->flags = (mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | IORESOURCE_MEM;
region.start = base;
region.end = limit + 0xfffff;
pcibios_bus_to_resource(dev->bus, res, &region);
if (log)
pci_info(dev, " bridge window %pR\n", res);
+ } else {
+ resource_set_range(res, 0, 0);
+ res->flags |= IORESOURCE_UNSET | IORESOURCE_DISABLED;
}
}
@@ -489,16 +498,20 @@ static void pci_read_bridge_mmio_pref(struct pci_dev *dev, struct resource *res,
return;
}
+ res->flags = (mem_base_lo & PCI_PREF_RANGE_TYPE_MASK) | IORESOURCE_MEM |
+ IORESOURCE_PREFETCH;
+ if (res->flags & PCI_PREF_RANGE_TYPE_64)
+ res->flags |= IORESOURCE_MEM_64;
+
if (base <= limit) {
- res->flags = (mem_base_lo & PCI_PREF_RANGE_TYPE_MASK) |
- IORESOURCE_MEM | IORESOURCE_PREFETCH;
- if (res->flags & PCI_PREF_RANGE_TYPE_64)
- res->flags |= IORESOURCE_MEM_64;
region.start = base;
region.end = limit + 0xfffff;
pcibios_bus_to_resource(dev->bus, res, &region);
if (log)
pci_info(dev, " bridge window %pR\n", res);
+ } else {
+ resource_set_range(res, 0, 0);
+ res->flags |= IORESOURCE_UNSET | IORESOURCE_DISABLED;
}
}
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index b62465665abc..70b210ed200d 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -190,6 +190,31 @@ static bool pdev_resources_assignable(struct pci_dev *dev)
return true;
}
+static bool pdev_resource_assignable(struct pci_dev *dev, struct resource *res)
+{
+ int idx = pci_resource_num(dev, res);
+
+ if (!res->flags)
+ return false;
+
+ if (idx >= PCI_BRIDGE_RESOURCES && idx <= PCI_BRIDGE_RESOURCE_END &&
+ res->flags & IORESOURCE_DISABLED)
+ return false;
+
+ return true;
+}
+
+static bool pdev_resource_should_fit(struct pci_dev *dev, struct resource *res)
+{
+ if (res->parent)
+ return false;
+
+ if (res->flags & IORESOURCE_PCI_FIXED)
+ return false;
+
+ return pdev_resource_assignable(dev, res);
+}
+
/* Sort resources by alignment */
static void pdev_sort_resources(struct pci_dev *dev, struct list_head *head)
{
@@ -205,10 +230,7 @@ static void pdev_sort_resources(struct pci_dev *dev, struct list_head *head)
resource_size_t r_align;
struct list_head *n;
- if (r->flags & IORESOURCE_PCI_FIXED)
- continue;
-
- if (!(r->flags) || r->parent)
+ if (!pdev_resource_should_fit(dev, r))
continue;
r_align = pci_resource_alignment(dev, r);
@@ -257,8 +279,15 @@ bool pci_resource_is_optional(const struct pci_dev *dev, int resno)
return false;
}
-static inline void reset_resource(struct resource *res)
+static inline void reset_resource(struct pci_dev *dev, struct resource *res)
{
+ int idx = pci_resource_num(dev, res);
+
+ if (idx >= PCI_BRIDGE_RESOURCES && idx <= PCI_BRIDGE_RESOURCE_END) {
+ res->flags |= IORESOURCE_UNSET;
+ return;
+ }
+
res->start = 0;
res->end = 0;
res->flags = 0;
@@ -610,7 +639,7 @@ out:
0 /* don't care */);
}
- reset_resource(res);
+ reset_resource(dev, res);
}
free_list(head);
@@ -1014,8 +1043,11 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size,
if (r->parent || !(r->flags & IORESOURCE_IO))
continue;
- r_size = resource_size(r);
+ if (!pdev_resource_assignable(dev, r))
+ continue;
+
+ r_size = resource_size(r);
if (r_size < SZ_1K)
/* Might be re-aligned for ISA */
size += r_size;
@@ -1034,6 +1066,9 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size,
size0 = calculate_iosize(size, min_size, size1, 0, 0,
resource_size(b_res), min_align);
+ if (size0)
+ b_res->flags &= ~IORESOURCE_DISABLED;
+
size1 = size0;
if (realloc_head && (add_size > 0 || children_add_size > 0)) {
size1 = calculate_iosize(size, min_size, size1, add_size,
@@ -1045,13 +1080,14 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size,
if (bus->self && (b_res->start || b_res->end))
pci_info(bus->self, "disabling bridge window %pR to %pR (unused)\n",
b_res, &bus->busn_res);
- b_res->flags = 0;
+ b_res->flags |= IORESOURCE_DISABLED;
return;
}
resource_set_range(b_res, min_align, size0);
b_res->flags |= IORESOURCE_STARTALIGN;
if (bus->self && size1 > size0 && realloc_head) {
+ b_res->flags &= ~IORESOURCE_DISABLED;
add_to_list(realloc_head, bus->self, b_res, size1-size0,
min_align);
pci_info(bus->self, "bridge window %pR to %pR add_size %llx\n",
@@ -1198,11 +1234,13 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
const char *r_name = pci_resource_name(dev, i);
resource_size_t r_size;
- if (r->parent || (r->flags & IORESOURCE_PCI_FIXED) ||
- !pdev_resources_assignable(dev) ||
- ((r->flags & mask) != type &&
- (r->flags & mask) != type2 &&
- (r->flags & mask) != type3))
+ if (!pdev_resources_assignable(dev) ||
+ !pdev_resource_should_fit(dev, r))
+ continue;
+
+ if ((r->flags & mask) != type &&
+ (r->flags & mask) != type2 &&
+ (r->flags & mask) != type3)
continue;
r_size = resource_size(r);
@@ -1253,6 +1291,9 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
min_align = max(min_align, win_align);
size0 = calculate_memsize(size, min_size, 0, 0, resource_size(b_res), min_align);
+ if (size0)
+ b_res->flags &= ~IORESOURCE_DISABLED;
+
if (bus->self && size0 &&
!pbus_upstream_space_available(bus, mask | IORESOURCE_PREFETCH, type,
size0, min_align)) {
@@ -1287,13 +1328,14 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
if (bus->self && (b_res->start || b_res->end))
pci_info(bus->self, "disabling bridge window %pR to %pR (unused)\n",
b_res, &bus->busn_res);
- b_res->flags = 0;
+ b_res->flags |= IORESOURCE_DISABLED;
return 0;
}
resource_set_range(b_res, min_align, size0);
b_res->flags |= IORESOURCE_STARTALIGN;
if (bus->self && size1 > size0 && realloc_head) {
+ b_res->flags &= ~IORESOURCE_DISABLED;
add_to_list(realloc_head, bus->self, b_res, size1-size0, add_align);
pci_info(bus->self, "bridge window %pR to %pR add_size %llx add_align %llx\n",
b_res, &bus->busn_res,
@@ -1721,7 +1763,6 @@ static void pci_bridge_release_resources(struct pci_bus *bus,
{
struct pci_dev *dev = bus->self;
struct resource *r;
- unsigned int old_flags;
struct resource *b_res;
int idx, ret;
@@ -1758,17 +1799,15 @@ static void pci_bridge_release_resources(struct pci_bus *bus,
/* If there are children, release them all */
release_child_resources(r);
- type = old_flags = r->flags & PCI_RES_TYPE_MASK;
ret = pci_release_resource(dev, PCI_BRIDGE_RESOURCES + idx);
if (ret)
return;
+ type = r->flags & PCI_RES_TYPE_MASK;
/* Avoiding touch the one without PREF */
if (type & IORESOURCE_PREFETCH)
type = IORESOURCE_PREFETCH;
__pci_setup_bridge(bus, type);
- /* For next child res under same bridge */
- r->flags = old_flags;
}
enum release_type {
@@ -2246,21 +2285,9 @@ static void pci_prepare_next_assign_round(struct list_head *fail_head,
}
/* Restore size and flags */
- list_for_each_entry(fail_res, fail_head, list) {
- struct resource *res = fail_res->res;
- struct pci_dev *dev = fail_res->dev;
- int idx = pci_resource_num(dev, res);
-
+ list_for_each_entry(fail_res, fail_head, list)
restore_dev_resource(fail_res);
- if (!pci_is_bridge(dev))
- continue;
-
- if (idx >= PCI_BRIDGE_RESOURCES &&
- idx <= PCI_BRIDGE_RESOURCE_END)
- res->flags = 0;
- }
-
free_list(fail_head);
}
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index 4e0e60256f04..21f77e5c647c 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -359,6 +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);
generated by cgit v1.2.3 (git 2.39.0) at 2026-05-03 18:35:15 +0300