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Add patches to fix problems with PCI _CRS

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This commit is contained in:
Chuck Ebbert 2010-09-23 21:40:59 -04:00
parent 9e5584957c
commit 121bfe2c6a
5 changed files with 235 additions and 2 deletions
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18
kernel.spec
View File

@ -703,8 +703,8 @@ Patch12115: wacom-04-add-support-for-the-bamboo-touch-trackpad.patch
Patch12120: wacom-05-add-a-quirk-for-low-resolution-bamboo-devices.patch
Patch12125: wacom-06-request-tablet-data-for-bamboo-pens.patch
Patch12130: wacom-07-move-bamboo-touch-irq-to-its-own-function.patch
Patch12035: wacom-08-add-support-for-bamboo-pen.patch
Patch12040: wacom-09-disable-bamboo-touchpad-when-pen-is-being-used.patch
Patch12135: wacom-08-add-support-for-bamboo-pen.patch
Patch12140: wacom-09-disable-bamboo-touchpad-when-pen-is-being-used.patch
# Runtime power management
Patch12200: linux-2.6-bluetooth-autosuspend.patch
@ -712,6 +712,12 @@ Patch12201: linux-2.6-uvc-autosuspend.patch
Patch12202: linux-2.6-qcserial-autosuspend.patch
Patch12203: linux-2.6-usb-pci-autosuspend.patch
# PCI patches to fix problems with _CRS
Patch12221: pci-v2-1-4-resources-ensure-alignment-callback-doesn-t-allocate-below-available-start.patch
Patch12222: pci-v2-2-4-x86-PCI-allocate-space-from-the-end-of-a-region-not-the-beginning.patch
Patch12223: pci-v2-3-4-resources-allocate-space-within-a-region-from-the-top-down.patch
Patch12224: pci-v2-4-4-PCI-allocate-bus-resources-from-the-top-down.patch
Patch12300: btusb-macbookpro-7-1.patch
Patch12301: btusb-macbookpro-6-2.patch
@ -1307,6 +1313,13 @@ ApplyPatch linux-2.6-uvc-autosuspend.patch
ApplyPatch linux-2.6-qcserial-autosuspend.patch
ApplyPatch linux-2.6-usb-pci-autosuspend.patch
# PCI patches to fix problems with _CRS
# ( from https://bugzilla.kernel.org/show_bug.cgi?id=16228#c49 )
ApplyPatch pci-v2-1-4-resources-ensure-alignment-callback-doesn-t-allocate-below-available-start.patch
ApplyPatch pci-v2-2-4-x86-PCI-allocate-space-from-the-end-of-a-region-not-the-beginning.patch
ApplyPatch pci-v2-3-4-resources-allocate-space-within-a-region-from-the-top-down.patch
ApplyPatch pci-v2-4-4-PCI-allocate-bus-resources-from-the-top-down.patch
ApplyPatch btusb-macbookpro-7-1.patch
ApplyPatch btusb-macbookpro-6-2.patch
@ -1922,6 +1935,7 @@ fi
- Drop merged patches:
fix-icebp-breakpoints.patch
linux-2.6.35.4-virtio_console-fix-poll.patch
- Add patches to fix problems with PCI _CRS
* Thu Sep 23 2010 Kyle McMartin <kyle@redhat.com> 2.6.36-0.25.rc5
- Add s390 vdso AFTER_LINK to Roland's linux-2.6-makefile-after_link.patch

28
pci-v2-1-4-resources-ensure-alignment-callback-doesn-t-allocate-below-available-start.patch Normal file
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@ -0,0 +1,28 @@
diff --git a/kernel/resource.c b/kernel/resource.c
index 7b36976..ace2269 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -371,6 +371,7 @@ static int find_resource(struct resource *root, struct resource *new,
{
struct resource *this = root->child;
struct resource tmp = *new;
+ resource_size_t start;
tmp.start = root->start;
/*
@@ -391,8 +392,13 @@ static int find_resource(struct resource *root, struct resource *new,
if (tmp.end > max)
tmp.end = max;
tmp.start = ALIGN(tmp.start, align);
- if (alignf)
- tmp.start = alignf(alignf_data, &tmp, size, align);
+ if (alignf) {
+ start = alignf(alignf_data, &tmp, size, align);
+ if (tmp.start <= start && start <= tmp.end)
+ tmp.start = start;
+ else
+ tmp.start = tmp.end;
+ }
if (tmp.start < tmp.end && tmp.end - tmp.start >= size - 1) {
new->start = tmp.start;
new->end = tmp.start + size - 1;

40
pci-v2-2-4-x86-PCI-allocate-space-from-the-end-of-a-region-not-the-beginning.patch Normal file
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@ -0,0 +1,40 @@
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
index 5525309..fe866c8 100644
--- a/arch/x86/pci/i386.c
+++ b/arch/x86/pci/i386.c
@@ -37,6 +37,7 @@
#include <asm/pci_x86.h>
#include <asm/io_apic.h>
+#define ALIGN_DOWN(x, a) ((x) & ~(a - 1))
static int
skip_isa_ioresource_align(struct pci_dev *dev) {
@@ -65,16 +66,21 @@ pcibios_align_resource(void *data, const struct resource *res,
resource_size_t size, resource_size_t align)
{
struct pci_dev *dev = data;
- resource_size_t start = res->start;
+ resource_size_t start = ALIGN_DOWN(res->end - size + 1, align);
if (res->flags & IORESOURCE_IO) {
- if (skip_isa_ioresource_align(dev))
- return start;
- if (start & 0x300)
- start = (start + 0x3ff) & ~0x3ff;
+
+ /*
+ * If we're avoiding ISA aliases, the largest contiguous I/O
+ * port space is 256 bytes. Clearing bits 9 and 10 preserves
+ * all 256-byte and smaller alignments, so the result will
+ * still be correctly aligned.
+ */
+ if (!skip_isa_ioresource_align(dev))
+ start &= ~0x300;
} else if (res->flags & IORESOURCE_MEM) {
if (start < BIOS_END)
- start = BIOS_END;
+ start = res->end; /* fail; no space */
}
return start;
}

71
pci-v2-3-4-resources-allocate-space-within-a-region-from-the-top-down.patch Normal file
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@ -0,0 +1,71 @@
diff --git a/kernel/resource.c b/kernel/resource.c
index ace2269..1a2a40e 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -358,6 +358,20 @@ int __weak page_is_ram(unsigned long pfn)
}
/*
+ * Find the resource before "child" in the sibling list of "root" children.
+ */
+static struct resource *find_sibling_prev(struct resource *root, struct resource *child)
+{
+ struct resource *this;
+
+ for (this = root->child; this; this = this->sibling)
+ if (this->sibling == child)
+ return this;
+
+ return NULL;
+}
+
+/*
* Find empty slot in the resource tree given range and alignment.
*/
static int find_resource(struct resource *root, struct resource *new,
@@ -369,24 +383,18 @@ static int find_resource(struct resource *root, struct resource *new,
resource_size_t),
void *alignf_data)
{
- struct resource *this = root->child;
+ struct resource *this;
struct resource tmp = *new;
resource_size_t start;
- tmp.start = root->start;
- /*
- * Skip past an allocated resource that starts at 0, since the assignment
- * of this->start - 1 to tmp->end below would cause an underflow.
- */
- if (this && this->start == 0) {
- tmp.start = this->end + 1;
- this = this->sibling;
- }
- for(;;) {
+ tmp.end = root->end;
+
+ this = find_sibling_prev(root, NULL);
+ for (;;) {
if (this)
- tmp.end = this->start - 1;
+ tmp.start = this->end + 1;
else
- tmp.end = root->end;
+ tmp.start = root->start;
if (tmp.start < min)
tmp.start = min;
if (tmp.end > max)
@@ -404,10 +412,10 @@ static int find_resource(struct resource *root, struct resource *new,
new->end = tmp.start + size - 1;
return 0;
}
- if (!this)
+ if (!this || this->start == root->start)
break;
- tmp.start = this->end + 1;
- this = this->sibling;
+ tmp.end = this->start - 1;
+ this = find_sibling_prev(root, this);
}
return -EBUSY;
}

80
pci-v2-4-4-PCI-allocate-bus-resources-from-the-top-down.patch Normal file
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@ -0,0 +1,80 @@
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 7f0af0e..172bf26 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -64,6 +64,49 @@ void pci_bus_remove_resources(struct pci_bus *bus)
}
}
+/*
+ * Find the highest-address bus resource below the cursor "res". If the
+ * cursor is NULL, return the highest resource.
+ */
+static struct resource *pci_bus_find_resource_prev(struct pci_bus *bus,
+ unsigned int type,
+ struct resource *res)
+{
+ struct resource *r, *prev = NULL;
+ int i;
+
+ pci_bus_for_each_resource(bus, r, i) {
+ if (!r)
+ continue;
+
+ if ((r->flags & IORESOURCE_TYPE_BITS) != type)
+ continue;
+
+ /* If this resource is at or past the cursor, skip it */
+ if (res) {
+ if (r == res)
+ continue;
+ if (r->end > res->end)
+ continue;
+ if (r->end == res->end && r->start > res->start)
+ continue;
+ }
+
+ if (!prev)
+ prev = r;
+
+ /*
+ * A small resource is higher than a large one that ends at
+ * the same address.
+ */
+ if (r->end > prev->end ||
+ (r->end == prev->end && r->start > prev->start))
+ prev = r;
+ }
+
+ return prev;
+}
+
/**
* pci_bus_alloc_resource - allocate a resource from a parent bus
* @bus: PCI bus
@@ -89,9 +132,10 @@ pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
resource_size_t),
void *alignf_data)
{
- int i, ret = -ENOMEM;
+ int ret = -ENOMEM;
struct resource *r;
resource_size_t max = -1;
+ unsigned int type = res->flags & IORESOURCE_TYPE_BITS;
type_mask |= IORESOURCE_IO | IORESOURCE_MEM;
@@ -99,10 +143,9 @@ pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
if (!(res->flags & IORESOURCE_MEM_64))
max = PCIBIOS_MAX_MEM_32;
- pci_bus_for_each_resource(bus, r, i) {
- if (!r)
- continue;
-
+ /* Look for space at highest addresses first */
+ r = pci_bus_find_resource_prev(bus, type, NULL);
+ for ( ; r; r = pci_bus_find_resource_prev(bus, type, r)) {
/* type_mask must match */
if ((res->flags ^ r->flags) & type_mask)
continue;