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Message-ID: <CAErSpo5rWq0+CbPMtjruDv0eN8-q=qBhHQURFeia_CfOgmDotA@mail.gmail.com>
Date: Fri, 6 Sep 2013 09:36:21 -0600
From: Bjorn Helgaas <bhelgaas@...gle.com>
To: Lan Tianyu <tianyu.lan@...el.com>
Cc: Len Brown <lenb@...nel.org>, "Rafael J. Wysocki" <rjw@...k.pl>,
Yinghai Lu <yinghai@...nel.org>,
"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Tony Luck <tony.luck@...el.com>,
"linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>
Subject: Re: [RFC PATCH 4/4] X86/PCI/ACPI: Rework setup_resource() via
functions ACPI resource functions
[+cc Tony, linux-ia64]
On Fri, Sep 6, 2013 at 8:24 AM, Lan Tianyu <tianyu.lan@...el.com> wrote:
> Using ACPI resource functions to convert ACPI resource to generic resource
> instead of resource_to_addr(). Remove resource_to_addr().
>
> Signed-off-by: Lan Tianyu <tianyu.lan@...el.com>
> ---
> arch/x86/pci/acpi.c | 81 ++++++++---------------------------------------------
> 1 file changed, 12 insertions(+), 69 deletions(-)
Please make corresponding changes to arch/ia64/pci/pci.c so that these
paths remain as similar as possible. There's quite a bit of
similarity between this x86 and ia64 code, and it would be nice to
unify them more when possible.
> 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++;
>
> --
> 1.8.2.1
>
--
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