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Message-ID: <CAOLK0pxxAFBiDTac_5yPYO7X96Y4Tnd4kjwZ-Wvk1mZ3bD-w2A@mail.gmail.com>
Date: Mon, 26 Aug 2013 23:46:21 +0800
From: Lan Tianyu <lantianyu1986@...il.com>
To: Yinghai Lu <yinghai@...nel.org>
Cc: "Rafael J. Wysocki" <rjw@...k.pl>,
Bjorn Helgaas <bhelgaas@...gle.com>,
rui wang <ruiv.wang@...il.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
Tony Luck <tony.luck@...el.com>,
Linux PCI <linux-pci@...r.kernel.org>,
"linux-kernel@...r kernel org" <linux-kernel@...r.kernel.org>,
"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>
Subject: Re: [PATCH v4 28/28] PCI, x86, ACPI: get ioapic address from acpi device
2013/8/24 Yinghai Lu <yinghai@...nel.org>:
> On Fri, Aug 23, 2013 at 12:04 PM, Yinghai Lu <yinghai@...nel.org> wrote:
>> On Fri, Aug 23, 2013 at 11:38 AM, Yinghai Lu <yinghai@...nel.org> wrote:
>>> On Fri, Aug 23, 2013 at 8:34 AM, Lan Tianyu <lantianyu1986@...il.com> wrote:
>>>>> I worked around the problem by replacing acpi_resource_to_address64()
>>>>> with resource_to_addr(). But resource_to_addr() is a static function
>>>>> in arch/x86/pci/acpi.c, not very convenient to use. Here's what I did:
>>>>>
>>>>
>>>> Hi Rui&Yinghai:
>>>> How about using the following code to translate struct
>>>> acpi_resource to struct resouce in this setup_res()?
>>>>
>>>> if (acpi_dev_resource_address_space(...)
>>>> || acpi_dev_resource_memory(..))
>>>> return AE_OK;
>>>
>>> Yest, that could be better, will update that.
>>>
>>> Also can you submit patch that will use that in res_to_addr of
>>> arch/x86/pci/acpi.c?
>>
>> looks acpi_dev_resource_address_space... does not handle
>> PREFTCH and translation offset.
>>
>> So now i have to use res_to_addr alike one.
>
> Raphael,
>
> Maybe we should move resource_to_addr to acpi generic.
>
> Please check if you are ok with attached.
>
> Thanks
>
> Yinghai
Hi Rafael & Yinghai:
I wrote 4 proposal patches to try to make acpi resource
functions to replace
resource_to_addr() in the arch/x86/pci/acpi.c. From my opinion,
resource_to_addr()
does most work which acpi resource functions have done. So please have
a look. Thanks.
The following patches just passed through compiling test.
Patch 1
-------------------
commit 1800bc9dda7318314607fbae7afda8be38e056dc
Author: Lan Tianyu <tianyu.lan@...el.com>
Date: Mon Aug 26 14:40:39 2013 +0800
ACPI/Resource: Add setting PREFETCH flag support
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index b7201fc..23a560b 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -35,7 +35,7 @@
#endif
static unsigned long acpi_dev_memresource_flags(u64 len, u8 write_protect,
- bool window)
+ bool window, bool prefetchable)
{
unsigned long flags = IORESOURCE_MEM;
@@ -48,6 +48,9 @@ static unsigned long acpi_dev_memresource_flags(u64
len, u8 write_protect,
if (window)
flags |= IORESOURCE_WINDOW;
+ if (prefetchable)
+ flags |= IORESOURCE_PREFETCH;
+
return flags;
}
@@ -56,7 +59,8 @@ static void acpi_dev_get_memresource(struct resource
*res, u64 start, u64 len,
{
res->start = start;
res->end = start + len - 1;
- res->flags = acpi_dev_memresource_flags(len, write_protect, false);
+ res->flags = acpi_dev_memresource_flags(len, write_protect,
+ false, false);
}
/**
@@ -175,7 +179,7 @@ bool acpi_dev_resource_address_space(struct
acpi_resource *ares,
{
acpi_status status;
struct acpi_resource_address64 addr;
- bool window;
+ bool window, prefetchable;
u64 len;
u8 io_decode;
@@ -199,9 +203,11 @@ bool acpi_dev_resource_address_space(struct
acpi_resource *ares,
switch(addr.resource_type) {
case ACPI_MEMORY_RANGE:
len = addr.maximum - addr.minimum + 1;
+ prefetchable =
+ addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY;
res->flags = acpi_dev_memresource_flags(len,
addr.info.mem.write_protect,
- window);
+ window, prefetchable);
break;
case ACPI_IO_RANGE:
io_decode = addr.granularity == 0xfff ?
@@ -252,7 +258,7 @@ bool acpi_dev_resource_ext_address_space(struct
acpi_resource *ares,
len = ext_addr->maximum - ext_addr->minimum + 1;
res->flags = acpi_dev_memresource_flags(len,
ext_addr->info.mem.write_protect,
- window);
+ window, false);
break;
case ACPI_IO_RANGE:
io_decode = ext_addr->granularity == 0xfff ?
Patch 2
-----------
commit a3ff8345ffb51885b216ba0ae231252cd88d4e76
Author: Lan Tianyu <tianyu.lan@...el.com>
Date: Mon Aug 26 15:57:14 2013 +0800
ACPI/Resource: Add address translation support
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 23a560b..439ee44 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -196,8 +196,8 @@ bool acpi_dev_resource_address_space(struct
acpi_resource *ares,
if (ACPI_FAILURE(status))
return true;
- res->start = addr.minimum;
- res->end = addr.maximum;
+ res->start = addr.minimum + addr.translation_offset;
+ res->end = addr.maximum + addr.translation_offset;
window = addr.producer_consumer == ACPI_PRODUCER;
switch(addr.resource_type) {
Patch 3
---------------
commit 68bfefe619b49baa5d372e0664a6cb6d5138fad1
Author: Lan Tianyu <tianyu.lan@...el.com>
Date: Mon Aug 26 21:45:32 2013 +0800
ACPI: Add new acpi_dev_resource_address_space_with_addr() function
Add new function which can return the converted struct
acpi_resource_address64.
This will be used to get transaction offset in the setup_resource().
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 439ee44..98a6c35 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -174,11 +174,11 @@ EXPORT_SYMBOL_GPL(acpi_dev_resource_io);
* and if that's the case, use the information in it to populate the generic
* resource object pointed to by @res.
*/
-bool acpi_dev_resource_address_space(struct acpi_resource *ares,
+bool acpi_dev_resource_address_space_with_addr(struct acpi_resource *ares,
+ struct acpi_resource_address64 *addr,
struct resource *res)
{
acpi_status status;
- struct acpi_resource_address64 addr;
bool window, prefetchable;
u64 len;
u8 io_decode;
@@ -192,28 +192,28 @@ bool acpi_dev_resource_address_space(struct
acpi_resource *ares,
return false;
}
- status = acpi_resource_to_address64(ares, &addr);
+ status = acpi_resource_to_address64(ares, addr);
if (ACPI_FAILURE(status))
return true;
- res->start = addr.minimum + addr.translation_offset;
- res->end = addr.maximum + addr.translation_offset;
- window = addr.producer_consumer == ACPI_PRODUCER;
+ res->start = addr->minimum + addr->translation_offset;
+ res->end = addr->maximum + addr->translation_offset;
+ window = addr->producer_consumer == ACPI_PRODUCER;
- switch(addr.resource_type) {
+ switch (addr->resource_type) {
case ACPI_MEMORY_RANGE:
- len = addr.maximum - addr.minimum + 1;
+ len = addr->maximum - addr->minimum + 1;
prefetchable =
- addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY;
+ addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY;
res->flags = acpi_dev_memresource_flags(len,
- addr.info.mem.write_protect,
+ addr->info.mem.write_protect,
window, prefetchable);
break;
case ACPI_IO_RANGE:
- io_decode = addr.granularity == 0xfff ?
+ io_decode = addr->granularity == 0xfff ?
ACPI_DECODE_10 : ACPI_DECODE_16;
- res->flags = acpi_dev_ioresource_flags(addr.minimum,
- addr.maximum,
+ res->flags = acpi_dev_ioresource_flags(addr->minimum,
+ addr->maximum,
io_decode, window);
break;
case ACPI_BUS_NUMBER_RANGE:
@@ -225,6 +225,16 @@ bool acpi_dev_resource_address_space(struct
acpi_resource *ares,
return true;
}
+EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space_with_addr);
+
+bool acpi_dev_resource_address_space(struct acpi_resource *ares,
+ struct resource *res)
+{
+ struct acpi_resource_address64 addr;
+
+ return acpi_dev_resource_address_space_with_addr(ares, &addr,
+ res);
+}
EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space);
/**
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index a5db4ae..9f5c0d5 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -260,6 +260,9 @@ bool acpi_dev_resource_memory(struct acpi_resource
*ares, struct resource *res);
bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res);
bool acpi_dev_resource_address_space(struct acpi_resource *ares,
struct resource *res);
+bool acpi_dev_resource_address_space_with_addr(struct acpi_resource *ares,
+ struct acpi_resource_address64 *addr,
+ struct resource *res);
bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
struct resource *res);
unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable);
Patch 4
--------------
commit a8733a1da756a257d55e68994268174b84b33670
Author: Lan Tianyu <tianyu.lan@...el.com>
Date: Mon Aug 26 22:53:38 2013 +0800
X86/PCI/ACPI: Rework setup_resource() via functions acpi resource functions
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index d641897..d4f85a1 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -219,62 +219,15 @@ 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 res;
- status = resource_to_addr(acpi_res, &addr);
- if (ACPI_SUCCESS(status))
+ if (acpi_dev_resource_address_space(acpi_res, &res)
+ || acpi_dev_resource_memory(acpi_res, &res))
info->res_num++;
+
return AE_OK;
}
@@ -282,27 +235,18 @@ static acpi_status
setup_resource(struct acpi_resource *acpi_res, void *data)
{
struct pci_root_info *info = data;
- struct resource *res;
+ struct resource *res = &info->res[info->res_num];
struct acpi_resource_address64 addr;
- acpi_status status;
- unsigned long flags;
u64 start, orig_end, end;
- status = resource_to_addr(acpi_res, &addr);
- if (!ACPI_SUCCESS(status))
- return AE_OK;
+ memset(&addr, 0x00, sizeof(addr));
- 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
+ if (!(acpi_dev_resource_address_space_with_addr(acpi_res, &addr, res)
+ || acpi_dev_resource_memory(acpi_res, res)))
return AE_OK;
- start = addr.minimum + addr.translation_offset;
- orig_end = end = addr.maximum + addr.translation_offset;
+ start = res->start;
+ orig_end = end = res->end;
/* Exclude non-addressable range or non-addressable portion of range */
end = min(end, (u64)iomem_resource.end);
@@ -310,6 +254,7 @@ setup_resource(struct acpi_resource *acpi_res, void *data)
dev_info(&info->bridge->dev,
"host bridge window [%#llx-%#llx] "
"(ignored, not CPU addressable)\n", start, orig_end);
+ memset(&info->res[info->res_num], 0x00, sizeof(*res));
return AE_OK;
} else if (orig_end != end) {
dev_info(&info->bridge->dev,
@@ -318,11 +263,9 @@ setup_resource(struct acpi_resource *acpi_res, void *data)
start, orig_end, 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++;
--
Best regards
Tianyu Lan
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