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Date: Wed, 2 Jul 2014 16:30:32 -0600
From: Bjorn Helgaas <bhelgaas@...gle.com>
To: Jiang Liu <jiang.liu@...ux.intel.com>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Thomas Gleixner <tglx@...utronix.de>,
Grant Likely <grant.likely@...aro.org>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>,
"Rafael J. Wysocki" <rjw@...ysocki.net>,
Randy Dunlap <rdunlap@...radead.org>,
Yinghai Lu <yinghai@...nel.org>, x86@...nel.org,
Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Tony Luck <tony.luck@...el.com>,
Joerg Roedel <joro@...tes.org>,
Paul Gortmaker <paul.gortmaker@...driver.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
linux-acpi@...r.kernel.org
Subject: Re: [RFC Patch V2] x86/PCI/ACPI: kill private function
resource_to_addr()
On Thu, Jun 19, 2014 at 12:30:59AM +0800, Jiang Liu wrote:
> Replace private function resource_to_addr() to parse ACPI resources for
> PCI host bridge with public ACPI resource interfaces.
>
> Signed-off-by: Jiang Liu <jiang.liu@...ux.intel.com>
> ---
> Hi Bjorn,
> Thanks for your suggestion. Then how about this version?
Looks good to me. I assume you're merging this along with the rest of the
series. Let me know if you need me to do anything.
Bjorn
> ---
> arch/x86/pci/acpi.c | 142 ++++++++++++++++++---------------------------------
> 1 file changed, 51 insertions(+), 91 deletions(-)
>
> diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
> index 91bef49df228..cc0975ef86d1 100644
> --- a/arch/x86/pci/acpi.c
> +++ b/arch/x86/pci/acpi.c
> @@ -218,114 +218,74 @@ 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;
> + struct resource *res = &info->res[info->res_num];
> + u64 translation_offset = 0;
> +
> + memset(res, 0, sizeof(*res));
> + if (acpi_dev_resource_memory(acpi_res, res)) {
> + res->flags &= IORESOURCE_MEM | IORESOURCE_IO;
> + } else if (acpi_dev_resource_address_space(acpi_res, res)) {
> + u64 orig_end;
> + struct acpi_resource_address64 addr;
> +
> + res->flags &= IORESOURCE_MEM | IORESOURCE_IO;
> + if (res->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)
> + res->flags |= IORESOURCE_PREFETCH;
>
> - start = addr.minimum + addr.translation_offset;
> - orig_end = end = addr.maximum + addr.translation_offset;
> + translation_offset = addr.translation_offset;
> + orig_end = res->end;
> + res->start += translation_offset;
> + res->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 */
> + res->end = min(res->end, (u64)iomem_resource.end);
> + if (res->end <= res->start) {
> + dev_info(&info->bridge->dev,
> + "host bridge window [%#llx-%#llx] (ignored, not CPU addressable)\n",
> + res->start, orig_end);
> + return AE_OK;
> + } else if (orig_end != res->end) {
> + dev_info(&info->bridge->dev,
> + "host bridge window [%#llx-%#llx] ([%#llx-%#llx] ignored, not CPU addressable)\n",
> + res->start, orig_end, res->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 (res->flags && resource_size(res)) {
> + res->name = info->name;
> + 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", res);
> + }
>
> return AE_OK;
> }
> --
> 1.7.10.4
>
--
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