Re: [tip:x86/apic] x86, PCI, ACPI: Kill private function resource_to_addr() in arch/x86/pci/acpi.c

From: Yinghai Lu
Date: Tue Dec 09 2014 - 23:08:15 EST

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On Mon, Nov 3, 2014 at 2:57 AM, tip-bot for Jiang Liu <tipbot@xxxxxxxxx> wrote:
> Commit-ID: e22ce93870deae0e9a54e1539f0088538f187780
> Gitweb: http://git.kernel.org/tip/e22ce93870deae0e9a54e1539f0088538f187780
> Author: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
> AuthorDate: Mon, 27 Oct 2014 13:21:34 +0800
> Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> CommitDate: Mon, 3 Nov 2014 11:56:07 +0100
>
> x86, PCI, ACPI: Kill private function resource_to_addr() in arch/x86/pci/acpi.c
>
> Private function resource_to_addr() is used to parse ACPI resources
> for PCI host bridge. There are public interfaces available for that
> purpose, so replace resource_to_addr() with public interfaces.
>
> Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
> Reviewed-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
> Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> Cc: Tony Luck <tony.luck@xxxxxxxxx>
> Cc: Joerg Roedel <joro@xxxxxxxxxx>
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
> Cc: Rafael J. Wysocki <rjw@xxxxxxxxxxxxx>
> Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
> Cc: Yinghai Lu <yinghai@xxxxxxxxxx>
> Cc: Borislav Petkov <bp@xxxxxxxxx>
> Link: http://lkml.kernel.org/r/1414387308-27148-5-git-send-email-jiang.liu@xxxxxxxxxxxxxxx
> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> ---
> arch/x86/pci/acpi.c | 144 +++++++++++++++++++---------------------------------
> 1 file changed, 53 insertions(+), 91 deletions(-)
>
> diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
> index cfd1b13..3f72d93 100644
> --- a/arch/x86/pci/acpi.c
> +++ b/arch/x86/pci/acpi.c
> @@ -218,114 +218,76 @@ static void teardown_mcfg_map(struct pci_root_info *info)
> }
> #endif
>
> -static acpi_status resource_to_addr(struct acpi_resource *resource,
> - struct acpi_resource_address64 *addr)
> -{
> - acpi_status status;
> - struct acpi_resource_memory24 *memory24;
> - struct acpi_resource_memory32 *memory32;
> - struct acpi_resource_fixed_memory32 *fixed_memory32;
> -
> - memset(addr, 0, sizeof(*addr));
> - switch (resource->type) {
> - case ACPI_RESOURCE_TYPE_MEMORY24:
> - memory24 = &resource->data.memory24;
> - addr->resource_type = ACPI_MEMORY_RANGE;
> - addr->minimum = memory24->minimum;
> - addr->address_length = memory24->address_length;
> - addr->maximum = addr->minimum + addr->address_length - 1;
> - return AE_OK;
> - case ACPI_RESOURCE_TYPE_MEMORY32:
> - memory32 = &resource->data.memory32;
> - addr->resource_type = ACPI_MEMORY_RANGE;
> - addr->minimum = memory32->minimum;
> - addr->address_length = memory32->address_length;
> - addr->maximum = addr->minimum + addr->address_length - 1;
> - return AE_OK;
> - case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
> - fixed_memory32 = &resource->data.fixed_memory32;
> - addr->resource_type = ACPI_MEMORY_RANGE;
> - addr->minimum = fixed_memory32->address;
> - addr->address_length = fixed_memory32->address_length;
> - addr->maximum = addr->minimum + addr->address_length - 1;
> - return AE_OK;
> - case ACPI_RESOURCE_TYPE_ADDRESS16:
> - case ACPI_RESOURCE_TYPE_ADDRESS32:
> - case ACPI_RESOURCE_TYPE_ADDRESS64:
> - status = acpi_resource_to_address64(resource, addr);
> - if (ACPI_SUCCESS(status) &&
> - (addr->resource_type == ACPI_MEMORY_RANGE ||
> - addr->resource_type == ACPI_IO_RANGE) &&
> - addr->address_length > 0) {
> - return AE_OK;
> - }
> - break;
> - }
> - return AE_ERROR;
> -}
> -
> static acpi_status count_resource(struct acpi_resource *acpi_res, void *data)
> {
> struct pci_root_info *info = data;
> - struct acpi_resource_address64 addr;
> - acpi_status status;
> + struct resource r = {
> + .flags = 0
> + };
>
> - status = resource_to_addr(acpi_res, &addr);
> - if (ACPI_SUCCESS(status))
> + if (!acpi_dev_resource_memory(acpi_res, &r) &&
> + !acpi_dev_resource_address_space(acpi_res, &r))
> + return AE_OK;
> +
> + if ((r.flags & (IORESOURCE_IO | IORESOURCE_MEM)) && resource_size(&r))
> info->res_num++;
> +
> return AE_OK;
> }
>
> static acpi_status setup_resource(struct acpi_resource *acpi_res, void *data)
> {
> struct pci_root_info *info = data;
> - struct resource *res;
> - struct acpi_resource_address64 addr;
> - acpi_status status;
> - unsigned long flags;
> - u64 start, orig_end, end;
> + u64 translation_offset = 0;
> + struct resource r = {
> + .flags = 0
> + };
> +
> + if (acpi_dev_resource_memory(acpi_res, &r)) {
> + r.flags &= IORESOURCE_MEM | IORESOURCE_IO;
> + } else if (acpi_dev_resource_address_space(acpi_res, &r)) {
> + u64 orig_end;
> + struct acpi_resource_address64 addr;
> +
> + r.flags &= IORESOURCE_MEM | IORESOURCE_IO;
> + if (r.flags == 0)
> + return AE_OK;
>
> - status = resource_to_addr(acpi_res, &addr);
> - if (!ACPI_SUCCESS(status))
> - return AE_OK;
> + if (ACPI_FAILURE(acpi_resource_to_address64(acpi_res, &addr)))
> + return AE_OK;
>
> - if (addr.resource_type == ACPI_MEMORY_RANGE) {
> - flags = IORESOURCE_MEM;
> - if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
> - flags |= IORESOURCE_PREFETCH;
> - } else if (addr.resource_type == ACPI_IO_RANGE) {
> - flags = IORESOURCE_IO;
> - } else
> - return AE_OK;
> + if (addr.resource_type == ACPI_MEMORY_RANGE &&
> + addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
> + r.flags |= IORESOURCE_PREFETCH;
>
> - start = addr.minimum + addr.translation_offset;
> - orig_end = end = addr.maximum + addr.translation_offset;
> + translation_offset = addr.translation_offset;
> + orig_end = r.end;
> + r.start += translation_offset;
> + r.end += translation_offset;
>
> - /* Exclude non-addressable range or non-addressable portion of range */
> - end = min(end, (u64)iomem_resource.end);
> - if (end <= start) {
> - dev_info(&info->bridge->dev,
> - "host bridge window [%#llx-%#llx] "
> - "(ignored, not CPU addressable)\n", start, orig_end);
> - return AE_OK;
> - } else if (orig_end != end) {
> - dev_info(&info->bridge->dev,
> - "host bridge window [%#llx-%#llx] "
> - "([%#llx-%#llx] ignored, not CPU addressable)\n",
> - start, orig_end, end + 1, orig_end);
> + /* Exclude non-addressable range or non-addressable portion of range */
> + r.end = min(r.end, iomem_resource.end);
> + if (r.end <= r.start) {
> + dev_info(&info->bridge->dev,
> + "host bridge window [%#llx-%#llx] (ignored, not CPU addressable)\n",
> + r.start, orig_end);
> + return AE_OK;
> + } else if (orig_end != r.end) {
> + dev_info(&info->bridge->dev,
> + "host bridge window [%#llx-%#llx] ([%#llx-%#llx] ignored, not CPU addressable)\n",
> + r.start, orig_end, r.end + 1, orig_end);
> + }
> }
>
> - res = &info->res[info->res_num];
> - res->name = info->name;
> - res->flags = flags;
> - res->start = start;
> - res->end = end;
> - info->res_offset[info->res_num] = addr.translation_offset;
> - info->res_num++;
> -
> - if (!pci_use_crs)
> - dev_printk(KERN_DEBUG, &info->bridge->dev,
> - "host bridge window %pR (ignored)\n", res);
> + if (r.flags && resource_size(&r)) {
> + r.name = info->name;
> + info->res[info->res_num] = r;
> + info->res_offset[info->res_num] = translation_offset;
> + info->res_num++;
> + if (!pci_use_crs)
> + dev_printk(KERN_DEBUG, &info->bridge->dev,
> + "host bridge window %pR (ignored)\n", &r);
> + }
>
> return AE_OK;
> }

This one cause one system with Nehalem and one with Westmere failing.

[ 32.353347] acpi PNP0A08:00: host bridge window expanded to [mem
0x00000000-0xffffffff]; [mem 0x000a0000-0x000bffff] ignored
[ 32.362897] acpi PNP0A08:00: host bridge window expanded to [mem
0x00000000-0xffffffff]; [mem 0x000d0000-0x000dffff] ignored
[ 32.382862] acpi PNP0A08:00: host bridge window expanded to [mem
0x00000000-0xffffffff]; [mem 0x00000000-0xffffffff] ignored
[ 32.402889] acpi PNP0A08:00: host bridge window expanded to [mem
0x00000000-0xffffffff]; [??? 0x00000000-0xffffffff flags 0x0] ignored
[ 32.423000] acpi PNP0A08:00: host bridge window expanded to [mem
0x00000000-0xffffffff]; [mem 0x00000000-0xffffffff] ignored
[ 32.602921] PCI host bridge to bus 0000:00
[ 32.603158] pci_bus 0000:00: root bus resource [bus 00-3f]
[ 32.622782] pci_bus 0000:00: root bus resource [io 0x0000-0x5fff]
[ 32.642569] pci_bus 0000:00: root bus resource [mem 0x00000000-0xffffffff]
[ 32.642893] pci_bus 0000:00: root bus resource [mem
0xfc000000000-0xfc07fffffff pref]

Looks like the commit have several problems.

Attached patch should address them.

Please fix it before it get into linus tree.

Thanks

Yinghai
Subject: [PATCH] x86, pci, acpi: fix root res probing

old setup with nehalem got:
[ 32.353347] acpi PNP0A08:00: host bridge window expanded to [mem 0x00000000-0xffffffff]; [mem 0x000a0000-0x000bffff] ignored
[ 32.362897] acpi PNP0A08:00: host bridge window expanded to [mem 0x00000000-0xffffffff]; [mem 0x000d0000-0x000dffff] ignored
[ 32.382862] acpi PNP0A08:00: host bridge window expanded to [mem 0x00000000-0xffffffff]; [mem 0x00000000-0xffffffff] ignored
[ 32.402889] acpi PNP0A08:00: host bridge window expanded to [mem 0x00000000-0xffffffff]; [??? 0x00000000-0xffffffff flags 0x0] ignored
[ 32.423000] acpi PNP0A08:00: host bridge window expanded to [mem 0x00000000-0xffffffff]; [mem 0x00000000-0xffffffff] ignored
[ 32.602921] PCI host bridge to bus 0000:00
[ 32.603158] pci_bus 0000:00: root bus resource [bus 00-3f]
[ 32.622782] pci_bus 0000:00: root bus resource [io 0x0000-0x5fff]
[ 32.642569] pci_bus 0000:00: root bus resource [mem 0x00000000-0xffffffff]
[ 32.642893] pci_bus 0000:00: root bus resource [mem 0xfc000000000-0xfc07fffffff pref]

The problem is caused commit e22ce93870de ("x86, PCI, ACPI: Kill private function resource_to_addr() in arch/x86/pci/acpi.c").

as the system has
[ 32.395504] acpi PNP0A08:00: addr host bridge window [bus 00-3f]
[ 32.412395] acpi PNP0A08:00: addr host bridge window [io 0x0000-0x5fff window]
[ 32.412745] acpi PNP0A08:00: addr host bridge window [mem 0x000a0000-0x000bffff window]
[ 32.432559] acpi PNP0A08:00: addr host bridge window [mem 0x000d0000-0x000dffff window]
[ 32.452432] acpi PNP0A08:00: addr host bridge window [mem 0x00000000-0xffffffff window]
[ 32.472303] acpi PNP0A08:00: addr host bridge window [mem 0x90000000-0xafffffff window]
[ 32.472653] acpi PNP0A08:00: addr host bridge window [mem 0xfed40000-0xfed44fff window]
[ 32.492539] acpi PNP0A08:00: addr host bridge window [mem 0xfc000000000-0xfc07fffffff window]

but the one [mem 0x00000000-0xffffffff window] with address_length == 0 that was
rejected by old resource_to_addr().

Add that check into acpi_dev_resource_address_space() to fix the problem.

Also fixes other problems:
1. need to initialize local r and addr to 0.
2. fix orig_end assigning, as it should be after offset adding.
3. need to do clipping and checking for acpi_dev_resource_memory path.
4. also acpi_dev_resource_memory should & with IORESOURCE_MEM.

Fixes: commit e22ce93870de ("x86, PCI, ACPI: Kill private function resource_to_addr() in arch/x86/pci/acpi.c").
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>

---
arch/x86/pci/acpi.c | 60 +++++++++++++++++++++++-------------------------
drivers/acpi/resource.c | 2 -
2 files changed, 30 insertions(+), 32 deletions(-)

Index: linux-2.6/arch/x86/pci/acpi.c
===================================================================
--- linux-2.6.orig/arch/x86/pci/acpi.c
+++ linux-2.6/arch/x86/pci/acpi.c
@@ -221,10 +221,9 @@ static void teardown_mcfg_map(struct pci
static acpi_status count_resource(struct acpi_resource *acpi_res, void *data)
{
struct pci_root_info *info = data;
- struct resource r = {
- .flags = 0
- };
+ struct resource r;

+ memset(&r, 0, sizeof(r));
if (!acpi_dev_resource_memory(acpi_res, &r) &&
!acpi_dev_resource_address_space(acpi_res, &r))
return AE_OK;
@@ -239,20 +238,20 @@ static acpi_status setup_resource(struct
{
struct pci_root_info *info = data;
u64 translation_offset = 0;
- struct resource r = {
- .flags = 0
- };
+ struct resource r;
+ u64 orig_end;

+ memset(&r, 0, sizeof(r));
if (acpi_dev_resource_memory(acpi_res, &r)) {
- r.flags &= IORESOURCE_MEM | IORESOURCE_IO;
+ r.flags &= IORESOURCE_MEM;
} else if (acpi_dev_resource_address_space(acpi_res, &r)) {
- u64 orig_end;
struct acpi_resource_address64 addr;

r.flags &= IORESOURCE_MEM | IORESOURCE_IO;
if (r.flags == 0)
return AE_OK;

+ memset(&addr, 0, sizeof(addr));
if (ACPI_FAILURE(acpi_resource_to_address64(acpi_res, &addr)))
return AE_OK;

@@ -261,34 +260,33 @@ static acpi_status setup_resource(struct
r.flags |= IORESOURCE_PREFETCH;

translation_offset = addr.translation_offset;
- orig_end = r.end;
r.start += translation_offset;
r.end += translation_offset;
+ } else
+ return AE_OK;

- /* Exclude non-addressable range or non-addressable portion of range */
- r.end = min(r.end, iomem_resource.end);
- if (r.end <= r.start) {
- dev_info(&info->bridge->dev,
- "host bridge window [%#llx-%#llx] (ignored, not CPU addressable)\n",
- (unsigned long long)r.start, orig_end);
- return AE_OK;
- } else if (orig_end != r.end) {
- dev_info(&info->bridge->dev,
- "host bridge window [%#llx-%#llx] ([%#llx-%#llx] ignored, not CPU addressable)\n",
- (unsigned long long)r.start, orig_end,
- (unsigned long long)r.end + 1, orig_end);
- }
+ /* Exclude non-addressable range or non-addressable portion of range */
+ orig_end = r.end;
+ r.end = min(r.end, iomem_resource.end);
+ if (r.end <= r.start) {
+ dev_info(&info->bridge->dev,
+ "host bridge window [%#llx-%#llx] (ignored, not CPU addressable)\n",
+ (unsigned long long)r.start, orig_end);
+ return AE_OK;
+ } else if (orig_end != r.end) {
+ dev_info(&info->bridge->dev,
+ "host bridge window [%#llx-%#llx] ([%#llx-%#llx] ignored, not CPU addressable)\n",
+ (unsigned long long)r.start, orig_end,
+ (unsigned long long)r.end + 1, orig_end);
}

- if (r.flags && resource_size(&r)) {
- r.name = info->name;
- info->res[info->res_num] = r;
- info->res_offset[info->res_num] = translation_offset;
- info->res_num++;
- if (!pci_use_crs)
- dev_printk(KERN_DEBUG, &info->bridge->dev,
- "host bridge window %pR (ignored)\n", &r);
- }
+ r.name = info->name;
+ info->res[info->res_num] = r;
+ info->res_offset[info->res_num] = translation_offset;
+ info->res_num++;
+ if (!pci_use_crs)
+ dev_printk(KERN_DEBUG, &info->bridge->dev,
+ "host bridge window %pR (ignored)\n", &r);

return AE_OK;
}
Index: linux-2.6/drivers/acpi/resource.c
===================================================================
--- linux-2.6.orig/drivers/acpi/resource.c
+++ linux-2.6/drivers/acpi/resource.c
@@ -199,7 +199,7 @@ bool acpi_dev_resource_address_space(str
}

status = acpi_resource_to_address64(ares, &addr);
- if (ACPI_FAILURE(status))
+ if (ACPI_FAILURE(status) || !addr.address_length)
return false;

res->start = addr.minimum;

Next message: Ananth N Mavinakayanahalli: "Re: [RFC PATCH 8/8] perf probe powerpc: Fixup function entry if using kallsyms lookup"
Previous message: Jeremiah Mahler: "Re: [PATCH v13 11/12] input: cyapa: add gen5 trackpad device force re-calibrate function support"
Next in thread: Jiang Liu: "Re: [tip:x86/apic] x86, PCI, ACPI: Kill private function resource_to_addr() in arch/x86/pci/acpi.c"
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