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Date:	Sun,  2 Nov 2014 14:04:19 +0800
From:	Jiang Liu <jiang.liu@...ux.intel.com>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Randy Dunlap <rdunlap@...radead.org>,
	Yinghai Lu <yinghai@...nel.org>,
	Borislav Petkov <bp@...en8.de>, x86@...nel.org
Cc:	Jiang Liu <jiang.liu@...ux.intel.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tony Luck <tony.luck@...el.com>,
	Joerg Roedel <joro@...tes.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-acpi@...r.kernel.org
Subject: [Patch v8 04/18] 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.

Reviewed-by: Bjorn Helgaas <bhelgaas@...gle.com>
Signed-off-by: Jiang Liu <jiang.liu@...ux.intel.com>
---
 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 cfd1b132b8e3..3f72d934dc16 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;
 }
-- 
1.7.10.4

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