[RFC 0/7] Consolidate common ACPI PCI host bridge code into ACPI core

[RFC 0/7] Consolidate common ACPI PCI host bridge code into ACPI core

[Jiang Liu]

As suggested by Bjorn, this patch set consolidates common ACPI PCI host
bridge code from x86 and IA64 into ACPI core. It may also help to
support ACPI PCI host bridge on ARM64 platfrom too in future.

It introduces struct acpi_pci_root_ops and acpi_pci_root_create().
Arch code only needs to implement struct acpi_pci_root_ops and then
invoke acpi_pci_root_create() to parse ACPI resources and create
PCI root bus.
struct acpi_pci_root_info_common {
        struct pci_controller           controller;
        struct acpi_pci_root            *root;
        struct acpi_device              *bridge;
        struct acpi_pci_root_ops        *ops;
        struct list_head                resources;
        char                            name[16];
};
struct acpi_pci_root_ops {
	struct pci_ops *pci_ops;
	int (*init_info)(struct acpi_pci_root_info_common *info);
	void (*release_info)(struct acpi_pci_root_info_common *info);
	int (*prepare_resources)(struct acpi_pci_root_info_common *info,
				 int status);
};
extern struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
					    struct acpi_pci_root_ops *ops,
					    size_t extra_size);
It passes Fengguang's 0day test suite and has been tested on 
1) An Intel x86 4 socket platform
2) An Intel IA64 SDV
3) An HP IA64 platform

And you may access it at:
https://github.com/jiangliu/linux.git acpi_pci_root_v1

Thanks!
Gerry

Jiang Liu (7):
  ACPI/PCI: Enhance ACPI core to support sparse IO space
  ia64/PCI/ACPI: Use common ACPI resource parsing interface for host
    bridge
  ia64/PCI: Use common struct resource_entry to replace struct
    iospace_resource
  x86/PCI: Rename struct pci_sysdata as struct pci_controller
  PCI/ACPI: Consolidate common PCI host bridge code into ACPI core
  x86/PCI/ACPI: Use common interface to support PCI host bridge
  ia64/PCI/ACPI: Use common interface to support PCI host bridge

 arch/ia64/include/asm/pci.h   |    5 -
 arch/ia64/pci/pci.c           |  360 ++++++++++-------------------------------
 arch/x86/include/asm/pci.h    |   12 +-
 arch/x86/include/asm/pci_64.h |    4 +-
 arch/x86/pci/acpi.c           |  283 +++++++++-----------------------
 arch/x86/pci/common.c         |    2 +-
 drivers/acpi/pci_root.c       |  215 ++++++++++++++++++++++++
 drivers/acpi/resource.c       |    9 +-
 include/linux/ioport.h        |    1 +
 include/linux/pci-acpi.h      |   24 +++
 10 files changed, 409 insertions(+), 506 deletions(-)

-- 
1.7.10.4

[RFC 1/7] ACPI/PCI: Enhance ACPI core to support sparse IO space

[Jiang Liu]

Enhance ACPI resource parsing interfaces to support sparse IO space,
which will be used to share common code between x86 and IA64.

Tested-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
---
 drivers/acpi/resource.c |    9 ++++++---
 include/linux/ioport.h  |    1 +
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 0187e0e11bb8..5727c3bf98c9 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -123,7 +123,7 @@ bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res)
 EXPORT_SYMBOL_GPL(acpi_dev_resource_memory);
 
 static void acpi_dev_ioresource_flags(struct resource *res, u64 len,
-				      u8 io_decode)
+				      u8 io_decode, u8 translation_type)
 {
 	res->flags = IORESOURCE_IO;
 
@@ -135,6 +135,8 @@ static void acpi_dev_ioresource_flags(struct resource *res, u64 len,
 
 	if (io_decode == ACPI_DECODE_16)
 		res->flags |= IORESOURCE_IO_16BIT_ADDR;
+	if (translation_type == ACPI_SPARSE_TRANSLATION)
+		res->flags |= IORESOURCE_IO_SPARSE;
 }
 
 static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len,
@@ -142,7 +144,7 @@ static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len,
 {
 	res->start = start;
 	res->end = start + len - 1;
-	acpi_dev_ioresource_flags(res, len, io_decode);
+	acpi_dev_ioresource_flags(res, len, io_decode, 0);
 }
 
 /**
@@ -227,7 +229,8 @@ static bool acpi_decode_space(struct resource_win *win,
 		acpi_dev_memresource_flags(res, len, wp);
 		break;
 	case ACPI_IO_RANGE:
-		acpi_dev_ioresource_flags(res, len, iodec);
+		acpi_dev_ioresource_flags(res, len, iodec,
+					  addr->info.io.translation_type);
 		break;
 	case ACPI_BUS_NUMBER_RANGE:
 		res->flags = IORESOURCE_BUS;
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 2c5250222278..b9762760ca49 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -94,6 +94,7 @@ struct resource {
 /* PnP I/O specific bits (IORESOURCE_BITS) */
 #define IORESOURCE_IO_16BIT_ADDR	(1<<0)
 #define IORESOURCE_IO_FIXED		(1<<1)
+#define IORESOURCE_IO_SPARSE		(1<<2)
 
 /* PCI ROM control bits (IORESOURCE_BITS) */
 #define IORESOURCE_ROM_ENABLE		(1<<0)	/* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
-- 
1.7.10.4

[RFC 2/7] ia64/PCI/ACPI: Use common ACPI resource parsing interface for host bridge

[Jiang Liu]

Use common ACPI resource parsing interface to parse ACPI resources for
PCI host bridge, so we could share more code between IA64 and x86.
Later we will consolidate arch specific implementations into ACPI core.

Tested-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
---
 arch/ia64/pci/pci.c |  388 ++++++++++++++++++++++-----------------------------
 1 file changed, 168 insertions(+), 220 deletions(-)

diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index 48cc65705db4..cafe8e47afb2 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -115,29 +115,12 @@ struct pci_ops pci_root_ops = {
 	.write = pci_write,
 };
 
-/* Called by ACPI when it finds a new root bus.  */
-
-static struct pci_controller *alloc_pci_controller(int seg)
-{
-	struct pci_controller *controller;
-
-	controller = kzalloc(sizeof(*controller), GFP_KERNEL);
-	if (!controller)
-		return NULL;
-
-	controller->segment = seg;
-	return controller;
-}
-
 struct pci_root_info {
+	struct pci_controller controller;
 	struct acpi_device *bridge;
-	struct pci_controller *controller;
 	struct list_head resources;
-	struct resource *res;
-	resource_size_t *res_offset;
-	unsigned int res_num;
 	struct list_head io_resources;
-	char *name;
+	char name[16];
 };
 
 static unsigned int
@@ -168,11 +151,11 @@ new_space (u64 phys_base, int sparse)
 	return i;
 }
 
-static u64 add_io_space(struct pci_root_info *info,
-			struct acpi_resource_address64 *addr)
+static int add_io_space(struct device *dev, struct pci_root_info *info,
+			struct resource_entry *entry)
 {
 	struct iospace_resource *iospace;
-	struct resource *resource;
+	struct resource *resource, *res = entry->res;
 	char *name;
 	unsigned long base, min, max, base_port;
 	unsigned int sparse = 0, space_nr, len;
@@ -180,27 +163,24 @@ static u64 add_io_space(struct pci_root_info *info,
 	len = strlen(info->name) + 32;
 	iospace = kzalloc(sizeof(*iospace) + len, GFP_KERNEL);
 	if (!iospace) {
-		dev_err(&info->bridge->dev,
-				"PCI: No memory for %s I/O port space\n",
-				info->name);
-		goto out;
+		dev_err(dev, "PCI: No memory for %s I/O port space\n",
+			info->name);
+		return -ENOMEM;
 	}
 
-	name = (char *)(iospace + 1);
-
-	min = addr->address.minimum;
-	max = min + addr->address.address_length - 1;
-	if (addr->info.io.translation_type == ACPI_SPARSE_TRANSLATION)
+	if (res->flags & IORESOURCE_IO_SPARSE)
 		sparse = 1;
-
-	space_nr = new_space(addr->address.translation_offset, sparse);
+	space_nr = new_space(entry->offset, sparse);
 	if (space_nr == ~0)
 		goto free_resource;
 
+	name = (char *)(iospace + 1);
+	min = res->start - entry->offset;
+	max = res->end - entry->offset;
 	base = __pa(io_space[space_nr].mmio_base);
 	base_port = IO_SPACE_BASE(space_nr);
 	snprintf(name, len, "%s I/O Ports %08lx-%08lx", info->name,
-		base_port + min, base_port + max);
+		 base_port + min, base_port + max);
 
 	/*
 	 * The SDM guarantees the legacy 0-64K space is sparse, but if the
@@ -216,156 +196,174 @@ static u64 add_io_space(struct pci_root_info *info,
 	resource->start = base + (sparse ? IO_SPACE_SPARSE_ENCODING(min) : min);
 	resource->end   = base + (sparse ? IO_SPACE_SPARSE_ENCODING(max) : max);
 	if (insert_resource(&iomem_resource, resource)) {
-		dev_err(&info->bridge->dev,
-				"can't allocate host bridge io space resource  %pR\n",
-				resource);
+		dev_err(dev,
+			"can't allocate host bridge io space resource  %pR\n",
+			resource);
 		goto free_resource;
 	}
 
+	entry->offset = base_port;
+	res->start = min + base_port;
+	res->end = max + base_port;
 	list_add_tail(&iospace->list, &info->io_resources);
-	return base_port;
+
+	return 0;
 
 free_resource:
 	kfree(iospace);
-out:
-	return ~0;
+	return -ENOSPC;
 }
 
-static acpi_status resource_to_window(struct acpi_resource *resource,
-				      struct acpi_resource_address64 *addr)
+static int
+probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device,
+		    int busnum, int domain)
 {
-	acpi_status status;
+	int ret;
+	struct list_head *list = &info->resources;
+	struct resource_entry *entry, *tmp;
 
-	/*
-	 * We're only interested in _CRS descriptors that are
-	 *	- address space descriptors for memory or I/O space
-	 *	- non-zero size
-	 *	- producers, i.e., the address space is routed downstream,
-	 *	  not consumed by the bridge itself
-	 */
-	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.address_length &&
-	    addr->producer_consumer == ACPI_PRODUCER)
-		return AE_OK;
-
-	return AE_ERROR;
-}
+	ret = acpi_dev_get_resources(device, list,
+				     acpi_dev_filter_resource_type_cb,
+				     (void *)(IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_WINDOW));
+	if (ret < 0)
+		dev_warn(&device->dev,
+			 "failed to parse _CRS method, error code %d\n", ret);
+	else if (ret == 0)
+		dev_dbg(&device->dev,
+			"no IO and memory resources present in _CRS\n");
+	else
+		resource_list_for_each_entry_safe(entry, tmp, list) {
+			if (entry->res->flags & IORESOURCE_DISABLED)
+				resource_list_destroy_entry(entry);
+			else
+				entry->res->name = info->name;
+		}
 
-static acpi_status count_window(struct acpi_resource *resource, void *data)
-{
-	unsigned int *windows = (unsigned int *) data;
-	struct acpi_resource_address64 addr;
-	acpi_status status;
+	return ret;
+}
 
-	status = resource_to_window(resource, &addr);
-	if (ACPI_SUCCESS(status))
-		(*windows)++;
+static void validate_resources(struct device *dev, struct list_head *resources,
+			       unsigned long type)
+{
+	LIST_HEAD(list);
+	struct resource *res1, *res2, *root = NULL;
+	struct resource_entry *tmp, *entry, *entry2;
+
+	BUG_ON((type & (IORESOURCE_MEM | IORESOURCE_IO)) == 0);
+	root = (type & IORESOURCE_MEM) ? &iomem_resource : &ioport_resource;
+
+	list_splice_init(resources, &list);
+	resource_list_for_each_entry_safe(entry, tmp, &list) {
+		bool free = false;
+		resource_size_t end;
+
+		res1 = entry->res;
+		if (!(res1->flags & type))
+			goto next;
+
+		/* Exclude non-addressable range or non-addressable portion */
+		end = min(res1->end, root->end);
+		if (end <= res1->start) {
+			dev_info(dev, "host bridge window %pR (ignored, not CPU addressable)\n",
+				 res1);
+			free = true;
+			goto next;
+		} else if (res1->end != end) {
+			dev_info(dev, "host bridge window %pR ([%#llx-%#llx] ignored, not CPU addressable)\n",
+				 res1, (unsigned long long)end + 1,
+				 (unsigned long long)res1->end);
+			res1->end = end;
+		}
 
-	return AE_OK;
-}
+		resource_list_for_each_entry(entry2, resources) {
+			res2 = entry2->res;
+			if (!(res2->flags & type))
+				continue;
+
+			/*
+			 * I don't like throwing away windows because then
+			 * our resources no longer match the ACPI _CRS, but
+			 * the kernel resource tree doesn't allow overlaps.
+			 */
+			if (resource_overlaps(res1, res2)) {
+				res2->start = min(res1->start, res2->start);
+				res2->end = max(res1->end, res2->end);
+				dev_info(dev, "host bridge window expanded to %pR; %pR ignored\n",
+					 res2, res1);
+				free = true;
+				goto next;
+			}
+		}
 
-static acpi_status add_window(struct acpi_resource *res, void *data)
-{
-	struct pci_root_info *info = data;
-	struct resource *resource;
-	struct acpi_resource_address64 addr;
-	acpi_status status;
-	unsigned long flags, offset = 0;
-	struct resource *root;
-
-	/* Return AE_OK for non-window resources to keep scanning for more */
-	status = resource_to_window(res, &addr);
-	if (!ACPI_SUCCESS(status))
-		return AE_OK;
-
-	if (addr.resource_type == ACPI_MEMORY_RANGE) {
-		flags = IORESOURCE_MEM;
-		root = &iomem_resource;
-		offset = addr.address.translation_offset;
-	} else if (addr.resource_type == ACPI_IO_RANGE) {
-		flags = IORESOURCE_IO;
-		root = &ioport_resource;
-		offset = add_io_space(info, &addr);
-		if (offset == ~0)
-			return AE_OK;
-	} else
-		return AE_OK;
-
-	resource = &info->res[info->res_num];
-	resource->name = info->name;
-	resource->flags = flags;
-	resource->start = addr.address.minimum + offset;
-	resource->end = resource->start + addr.address.address_length - 1;
-	info->res_offset[info->res_num] = offset;
-
-	if (insert_resource(root, resource)) {
-		dev_err(&info->bridge->dev,
-			"can't allocate host bridge window %pR\n",
-			resource);
-	} else {
-		if (offset)
-			dev_info(&info->bridge->dev, "host bridge window %pR "
-				 "(PCI address [%#llx-%#llx])\n",
-				 resource,
-				 resource->start - offset,
-				 resource->end - offset);
+next:
+		resource_list_del(entry);
+		if (free)
+			resource_list_free_entry(entry);
 		else
-			dev_info(&info->bridge->dev,
-				 "host bridge window %pR\n", resource);
+			resource_list_add_tail(entry, resources);
 	}
-	/* HP's firmware has a hack to work around a Windows bug.
-	 * Ignore these tiny memory ranges */
-	if (!((resource->flags & IORESOURCE_MEM) &&
-	      (resource->end - resource->start < 16)))
-		pci_add_resource_offset(&info->resources, resource,
-					info->res_offset[info->res_num]);
-
-	info->res_num++;
-	return AE_OK;
 }
 
-static void free_pci_root_info_res(struct pci_root_info *info)
-{
-	struct iospace_resource *iospace, *tmp;
-
-	list_for_each_entry_safe(iospace, tmp, &info->io_resources, list)
-		kfree(iospace);
+static void add_resources(struct pci_root_info *info, struct device *dev)
+{
+	struct resource_entry *entry, *tmp;
+	struct resource *res, *conflict, *root = NULL;
+	struct list_head *list = &info->resources;
+
+	validate_resources(dev, list, IORESOURCE_MEM);
+	validate_resources(dev, list, IORESOURCE_IO);
+
+	resource_list_for_each_entry_safe(entry, tmp, list) {
+		res = entry->res;
+		if (res->flags & IORESOURCE_MEM) {
+			root = &iomem_resource;
+			/*
+			 * HP's firmware has a hack to work around a Windows
+			 * bug. Ignore these tiny memory ranges.
+			 */
+			if (resource_size(res) <= 16) {
+				resource_list_destroy_entry(entry);
+				continue;
+			}
+		} else if (res->flags & IORESOURCE_IO) {
+			root = &ioport_resource;
+			if (add_io_space(&info->bridge->dev, info, entry)) {
+				resource_list_destroy_entry(entry);
+				continue;
+			}
+		} else {
+			BUG_ON(res);
+		}
 
-	kfree(info->name);
-	kfree(info->res);
-	info->res = NULL;
-	kfree(info->res_offset);
-	info->res_offset = NULL;
-	info->res_num = 0;
-	kfree(info->controller);
-	info->controller = NULL;
+		conflict = insert_resource_conflict(root, res);
+		if (conflict) {
+			dev_info(dev,
+				 "ignoring host bridge window %pR (conflicts with %s %pR)\n",
+				 res, conflict->name, conflict);
+			resource_list_destroy_entry(entry);
+		}
+	}
 }
 
 static void __release_pci_root_info(struct pci_root_info *info)
 {
-	int i;
 	struct resource *res;
-	struct iospace_resource *iospace;
+	struct iospace_resource *iospace, *tmp;
+	struct resource_entry *entry, *tentry;
 
-	list_for_each_entry(iospace, &info->io_resources, list)
+	list_for_each_entry_safe(iospace, tmp, &info->io_resources, list) {
 		release_resource(&iospace->res);
+		kfree(iospace);
+	}
 
-	for (i = 0; i < info->res_num; i++) {
-		res = &info->res[i];
-
-		if (!res->parent)
-			continue;
-
-		if (!(res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
-			continue;
-
-		release_resource(res);
+	resource_list_for_each_entry_safe(entry, tentry, &info->resources) {
+		res = entry->res;
+		if (res->parent &&
+		    (res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
+			release_resource(res);
+		resource_list_destroy_entry(entry);
 	}
 
-	free_pci_root_info_res(info);
 	kfree(info);
 }
 
@@ -376,99 +374,49 @@ static void release_pci_root_info(struct pci_host_bridge *bridge)
 	__release_pci_root_info(info);
 }
 
-static int
-probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device,
-		int busnum, int domain)
-{
-	char *name;
-
-	name = kmalloc(16, GFP_KERNEL);
-	if (!name)
-		return -ENOMEM;
-
-	sprintf(name, "PCI Bus %04x:%02x", domain, busnum);
-	info->bridge = device;
-	info->name = name;
-
-	acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_window,
-			&info->res_num);
-	if (info->res_num) {
-		info->res =
-			kzalloc_node(sizeof(*info->res) * info->res_num,
-				     GFP_KERNEL, info->controller->node);
-		if (!info->res) {
-			kfree(name);
-			return -ENOMEM;
-		}
-
-		info->res_offset =
-			kzalloc_node(sizeof(*info->res_offset) * info->res_num,
-					GFP_KERNEL, info->controller->node);
-		if (!info->res_offset) {
-			kfree(name);
-			kfree(info->res);
-			info->res = NULL;
-			return -ENOMEM;
-		}
-
-		info->res_num = 0;
-		acpi_walk_resources(device->handle, METHOD_NAME__CRS,
-			add_window, info);
-	} else
-		kfree(name);
-
-	return 0;
-}
-
 struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
 {
 	struct acpi_device *device = root->device;
 	int domain = root->segment;
 	int bus = root->secondary.start;
-	struct pci_controller *controller;
-	struct pci_root_info *info = NULL;
-	int busnum = root->secondary.start;
+	struct pci_root_info *info;
 	struct pci_bus *pbus;
 	int ret;
 
-	controller = alloc_pci_controller(domain);
-	if (!controller)
-		return NULL;
-
-	controller->companion = device;
-	controller->node = acpi_get_node(device->handle);
-
 	info = kzalloc(sizeof(*info), GFP_KERNEL);
 	if (!info) {
 		dev_err(&device->dev,
-				"pci_bus %04x:%02x: ignored (out of memory)\n",
-				domain, busnum);
-		kfree(controller);
+			"pci_bus %04x:%02x: ignored (out of memory)\n",
+			domain, bus);
 		return NULL;
 	}
 
-	info->controller = controller;
-	INIT_LIST_HEAD(&info->io_resources);
+	info->controller.segment = domain;
+	info->controller.companion = device;
+	info->controller.node = acpi_get_node(device->handle);
+	info->bridge = device;
 	INIT_LIST_HEAD(&info->resources);
+	INIT_LIST_HEAD(&info->io_resources);
+	snprintf(info->name, sizeof(info->name),
+		 "PCI Bus %04x:%02x", domain, bus);
 
-	ret = probe_pci_root_info(info, device, busnum, domain);
-	if (ret) {
-		kfree(info->controller);
+	ret = probe_pci_root_info(info, device, bus, domain);
+	if (ret <= 0) {
 		kfree(info);
 		return NULL;
 	}
-	/* insert busn resource at first */
+	add_resources(info, &info->bridge->dev);
 	pci_add_resource(&info->resources, &root->secondary);
+
 	/*
 	 * See arch/x86/pci/acpi.c.
 	 * The desired pci bus might already be scanned in a quirk. We
 	 * should handle the case here, but it appears that IA64 hasn't
 	 * such quirk. So we just ignore the case now.
 	 */
-	pbus = pci_create_root_bus(NULL, bus, &pci_root_ops, controller,
-				   &info->resources);
+	pbus = pci_create_root_bus(NULL, bus, &pci_root_ops,
+				   &info->controller, &info->resources);
 	if (!pbus) {
-		pci_free_resource_list(&info->resources);
 		__release_pci_root_info(info);
 		return NULL;
 	}
-- 
1.7.10.4

[RFC 3/7] ia64/PCI: Use common struct resource_entry to replace struct iospace_resource

[Jiang Liu]

Use common struct resource_entry to replace private struct iospace_resource.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
---
 arch/ia64/include/asm/pci.h |    5 -----
 arch/ia64/pci/pci.c         |   17 ++++++++---------
 2 files changed, 8 insertions(+), 14 deletions(-)

diff --git a/arch/ia64/include/asm/pci.h b/arch/ia64/include/asm/pci.h
index 52af5ed9f60b..5c10e0ec48d4 100644
--- a/arch/ia64/include/asm/pci.h
+++ b/arch/ia64/include/asm/pci.h
@@ -83,11 +83,6 @@ extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
 #define pci_legacy_read platform_pci_legacy_read
 #define pci_legacy_write platform_pci_legacy_write
 
-struct iospace_resource {
-	struct list_head list;
-	struct resource res;
-};
-
 struct pci_controller {
 	struct acpi_device *companion;
 	void *iommu;
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index cafe8e47afb2..c5630dd5e181 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -154,14 +154,14 @@ new_space (u64 phys_base, int sparse)
 static int add_io_space(struct device *dev, struct pci_root_info *info,
 			struct resource_entry *entry)
 {
-	struct iospace_resource *iospace;
+	struct resource_entry *iospace;
 	struct resource *resource, *res = entry->res;
 	char *name;
 	unsigned long base, min, max, base_port;
 	unsigned int sparse = 0, space_nr, len;
 
 	len = strlen(info->name) + 32;
-	iospace = kzalloc(sizeof(*iospace) + len, GFP_KERNEL);
+	iospace = resource_list_create_entry(NULL, len);
 	if (!iospace) {
 		dev_err(dev, "PCI: No memory for %s I/O port space\n",
 			info->name);
@@ -190,7 +190,7 @@ static int add_io_space(struct device *dev, struct pci_root_info *info,
 	if (space_nr == 0)
 		sparse = 1;
 
-	resource = &iospace->res;
+	resource = iospace->res;
 	resource->name  = name;
 	resource->flags = IORESOURCE_MEM;
 	resource->start = base + (sparse ? IO_SPACE_SPARSE_ENCODING(min) : min);
@@ -205,12 +205,12 @@ static int add_io_space(struct device *dev, struct pci_root_info *info,
 	entry->offset = base_port;
 	res->start = min + base_port;
 	res->end = max + base_port;
-	list_add_tail(&iospace->list, &info->io_resources);
+	resource_list_add_tail(iospace, &info->io_resources);
 
 	return 0;
 
 free_resource:
-	kfree(iospace);
+	resource_list_free_entry(iospace);
 	return -ENOSPC;
 }
 
@@ -348,12 +348,11 @@ static void add_resources(struct pci_root_info *info, struct device *dev)
 static void __release_pci_root_info(struct pci_root_info *info)
 {
 	struct resource *res;
-	struct iospace_resource *iospace, *tmp;
 	struct resource_entry *entry, *tentry;
 
-	list_for_each_entry_safe(iospace, tmp, &info->io_resources, list) {
-		release_resource(&iospace->res);
-		kfree(iospace);
+	resource_list_for_each_entry_safe(entry, tentry, &info->io_resources) {
+		release_resource(entry->res);
+		resource_list_destroy_entry(entry);
 	}
 
 	resource_list_for_each_entry_safe(entry, tentry, &info->resources) {
-- 
1.7.10.4

[RFC 4/7] x86/PCI: Rename struct pci_sysdata as struct pci_controller

[Jiang Liu]

Rename struct pci_sysdata as struct pci_controller, so we could share
common code between IA64 and x86 later.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
---
 arch/x86/include/asm/pci.h    |   12 ++++++------
 arch/x86/include/asm/pci_64.h |    4 ++--
 arch/x86/pci/acpi.c           |    8 ++++----
 arch/x86/pci/common.c         |    2 +-
 4 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/arch/x86/include/asm/pci.h b/arch/x86/include/asm/pci.h
index 4e370a5d8117..5fcdf53fcd54 100644
--- a/arch/x86/include/asm/pci.h
+++ b/arch/x86/include/asm/pci.h
@@ -11,15 +11,15 @@
 
 #ifdef __KERNEL__
 
-struct pci_sysdata {
-	int		domain;		/* PCI domain */
-	int		node;		/* NUMA node */
+struct pci_controller {
 #ifdef CONFIG_ACPI
 	struct acpi_device *companion;	/* ACPI companion device */
 #endif
 #ifdef CONFIG_X86_64
 	void		*iommu;		/* IOMMU private data */
 #endif
+	int		segment;	/* PCI domain */
+	int		node;		/* NUMA node */
 };
 
 extern int pci_routeirq;
@@ -31,8 +31,8 @@ extern int noioapicreroute;
 #ifdef CONFIG_PCI_DOMAINS
 static inline int pci_domain_nr(struct pci_bus *bus)
 {
-	struct pci_sysdata *sd = bus->sysdata;
-	return sd->domain;
+	struct pci_controller *sd = bus->sysdata;
+	return sd->segment;
 }
 
 static inline int pci_proc_domain(struct pci_bus *bus)
@@ -127,7 +127,7 @@ int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc,
 /* Returns the node based on pci bus */
 static inline int __pcibus_to_node(const struct pci_bus *bus)
 {
-	const struct pci_sysdata *sd = bus->sysdata;
+	const struct pci_controller *sd = bus->sysdata;
 
 	return sd->node;
 }
diff --git a/arch/x86/include/asm/pci_64.h b/arch/x86/include/asm/pci_64.h
index fe15cfb21b9b..dcbb6b52d4fd 100644
--- a/arch/x86/include/asm/pci_64.h
+++ b/arch/x86/include/asm/pci_64.h
@@ -6,13 +6,13 @@
 #ifdef CONFIG_CALGARY_IOMMU
 static inline void *pci_iommu(struct pci_bus *bus)
 {
-	struct pci_sysdata *sd = bus->sysdata;
+	struct pci_controller *sd = bus->sysdata;
 	return sd->iommu;
 }
 
 static inline void set_pci_iommu(struct pci_bus *bus, void *val)
 {
-	struct pci_sysdata *sd = bus->sysdata;
+	struct pci_controller *sd = bus->sysdata;
 	sd->iommu = val;
 }
 #endif /* CONFIG_CALGARY_IOMMU */
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index 150774be0f3f..e7f35dc84801 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -10,7 +10,7 @@
 struct pci_root_info {
 	struct acpi_device *bridge;
 	char name[16];
-	struct pci_sysdata sd;
+	struct pci_controller sd;
 #ifdef	CONFIG_PCI_MMCONFIG
 	bool mcfg_added;
 	u16 segment;
@@ -366,7 +366,7 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
 	LIST_HEAD(crs_res);
 	LIST_HEAD(resources);
 	struct pci_bus *bus;
-	struct pci_sysdata *sd;
+	struct pci_controller *sd;
 	int node;
 
 	if (pci_ignore_seg)
@@ -398,7 +398,7 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
 	}
 
 	sd = &info->sd;
-	sd->domain = domain;
+	sd->segment = domain;
 	sd->node = node;
 	sd->companion = device;
 
@@ -464,7 +464,7 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
 
 int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
 {
-	struct pci_sysdata *sd = bridge->bus->sysdata;
+	struct pci_controller *sd = bridge->bus->sysdata;
 
 	ACPI_COMPANION_SET(&bridge->dev, sd->companion);
 	return 0;
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index 2fb384724ebb..e87194bad7e6 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -475,7 +475,7 @@ void __init dmi_check_pciprobe(void)
 void pcibios_scan_root(int busnum)
 {
 	struct pci_bus *bus;
-	struct pci_sysdata *sd;
+	struct pci_controller *sd;
 	LIST_HEAD(resources);
 
 	sd = kzalloc(sizeof(*sd), GFP_KERNEL);
-- 
1.7.10.4

[RFC 5/7] PCI/ACPI: Consolidate common PCI host bridge code into ACPI core

[Jiang Liu]

Introduce common interface acpi_pci_root_create() and related data
structures to create PCI root bus for ACPI PCI host bridges. It will
be used to kill duplicated arch specific code for IA64 and x86. It may
also help ARM64 in future.

Tested-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
---
 drivers/acpi/pci_root.c  |  215 ++++++++++++++++++++++++++++++++++++++++++++++
 include/linux/pci-acpi.h |   24 ++++++
 2 files changed, 239 insertions(+)

diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 68a5f712cd19..32d6a5ba5534 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -659,6 +659,221 @@ static void acpi_pci_root_remove(struct acpi_device *device)
 	kfree(root);
 }
 
+static void acpi_pci_root_validate_resources(struct device *dev,
+					     struct list_head *resources,
+					     unsigned long type)
+{
+	LIST_HEAD(list);
+	struct resource *res1, *res2, *root = NULL;
+	struct resource_entry *tmp, *entry, *entry2;
+
+	BUG_ON((type & (IORESOURCE_MEM | IORESOURCE_IO)) == 0);
+	root = (type & IORESOURCE_MEM) ? &iomem_resource : &ioport_resource;
+
+	list_splice_init(resources, &list);
+	resource_list_for_each_entry_safe(entry, tmp, &list) {
+		bool free = false;
+		resource_size_t end;
+
+		res1 = entry->res;
+		if (!(res1->flags & type))
+			goto next;
+
+		/* Exclude non-addressable range or non-addressable portion */
+		end = min(res1->end, root->end);
+		if (end <= res1->start) {
+			dev_info(dev, "host bridge window %pR (ignored, not CPU addressable)\n",
+				 res1);
+			free = true;
+			goto next;
+		} else if (res1->end != end) {
+			dev_info(dev, "host bridge window %pR ([%#llx-%#llx] ignored, not CPU addressable)\n",
+				 res1, (unsigned long long)end + 1,
+				 (unsigned long long)res1->end);
+			res1->end = end;
+		}
+
+		resource_list_for_each_entry(entry2, resources) {
+			res2 = entry2->res;
+			if (!(res2->flags & type))
+				continue;
+
+			/*
+			 * I don't like throwing away windows because then
+			 * our resources no longer match the ACPI _CRS, but
+			 * the kernel resource tree doesn't allow overlaps.
+			 */
+			if (resource_overlaps(res1, res2)) {
+				res2->start = min(res1->start, res2->start);
+				res2->end = max(res1->end, res2->end);
+				dev_info(dev, "host bridge window expanded to %pR; %pR ignored\n",
+					 res2, res1);
+				free = true;
+				goto next;
+			}
+		}
+
+next:
+		resource_list_del(entry);
+		if (free)
+			resource_list_free_entry(entry);
+		else
+			resource_list_add_tail(entry, resources);
+	}
+}
+
+static int acpi_pci_probe_root_resources(struct acpi_pci_root_info_common *info)
+{
+	int ret;
+	struct list_head *list = &info->resources;
+	struct acpi_device *device = info->bridge;
+	struct resource_entry *entry, *tmp;
+	unsigned long flags;
+
+	flags = IORESOURCE_IO | IORESOURCE_MEM |
+		IORESOURCE_WINDOW | IORESOURCE_MEM_8AND16BIT;
+	ret = acpi_dev_get_resources(device, list,
+				     acpi_dev_filter_resource_type_cb,
+				     (void *)flags);
+	if (ret < 0)
+		dev_warn(&device->dev,
+			 "failed to parse _CRS method, error code %d\n", ret);
+	else if (ret == 0)
+		dev_dbg(&device->dev,
+			"no IO and memory resources present in _CRS\n");
+	else {
+		resource_list_for_each_entry_safe(entry, tmp, list) {
+			if (entry->res->flags & IORESOURCE_DISABLED)
+				resource_list_destroy_entry(entry);
+			else
+				entry->res->name = info->name;
+		}
+		acpi_pci_root_validate_resources(&device->dev, list,
+						 IORESOURCE_MEM);
+		acpi_pci_root_validate_resources(&device->dev, list,
+						 IORESOURCE_IO);
+	}
+
+	return ret;
+}
+
+static void pci_acpi_root_add_resources(struct acpi_pci_root_info_common *info)
+{
+	struct resource_entry *entry, *tmp;
+	struct resource *res, *conflict, *root = NULL;
+
+	resource_list_for_each_entry_safe(entry, tmp, &info->resources) {
+		res = entry->res;
+		if (res->flags & IORESOURCE_MEM)
+			root = &iomem_resource;
+		else if (res->flags & IORESOURCE_IO)
+			root = &ioport_resource;
+		else
+			continue;
+
+		conflict = insert_resource_conflict(root, res);
+		if (conflict) {
+			dev_info(&info->bridge->dev,
+				 "ignoring host bridge window %pR (conflicts with %s %pR)\n",
+				 res, conflict->name, conflict);
+			resource_list_destroy_entry(entry);
+		}
+	}
+}
+
+static void __acpi_pci_root_release_info(struct acpi_pci_root_info_common *info)
+{
+	struct resource *res;
+	struct resource_entry *entry, *tmp;
+
+	if (!info)
+		return;
+
+	if (info->ops && info->ops->release_info)
+		info->ops->release_info(info);
+
+	resource_list_for_each_entry_safe(entry, tmp, &info->resources) {
+		res = entry->res;
+		if (res->parent &&
+		    (res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
+			release_resource(res);
+		resource_list_destroy_entry(entry);
+	}
+
+	kfree(info);
+}
+
+static void acpi_pci_root_release_info(struct pci_host_bridge *bridge)
+{
+	struct resource *res;
+	struct resource_entry *entry;
+
+	resource_list_for_each_entry(entry, &bridge->windows) {
+		res = entry->res;
+		if (res->parent &&
+		    (res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
+			release_resource(res);
+	}
+	__acpi_pci_root_release_info(bridge->release_data);
+}
+
+struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
+				     struct acpi_pci_root_ops *ops,
+				     size_t extra_size)
+{
+	int ret, busnum = root->secondary.start;
+	struct acpi_device *device = root->device;
+	struct acpi_pci_root_info_common *info;
+	struct pci_bus *bus;
+
+	info = kzalloc(sizeof(*info) + extra_size, GFP_KERNEL);
+	if (!info) {
+		dev_err(&device->dev,
+			"pci_bus %04x:%02x: ignored (out of memory)\n",
+			root->segment, busnum);
+		return NULL;
+	}
+
+	info->controller.segment = root->segment;
+	info->controller.node = acpi_get_node(device->handle);
+	info->controller.companion = device;
+	info->root = root;
+	info->bridge = device;
+	info->ops = ops;
+	INIT_LIST_HEAD(&info->resources);
+	snprintf(info->name, sizeof(info->name), "PCI Bus %04x:%02x",
+		 info->controller.segment, busnum);
+	if (ops->init_info && ops->init_info(info)) {
+		kfree(info);
+		return NULL;
+	}
+
+	ret = acpi_pci_probe_root_resources(info);
+	if (ops->prepare_resources)
+		ret = ops->prepare_resources(info, ret);
+	if (ret < 0)
+		goto out_release_info;
+	else if (ret > 0)
+		pci_acpi_root_add_resources(info);
+	pci_add_resource(&info->resources, &root->secondary);
+
+	bus = pci_create_root_bus(NULL, busnum, ops->pci_ops,
+				  &info->controller, &info->resources);
+	if (bus) {
+		pci_scan_child_bus(bus);
+		pci_set_host_bridge_release(to_pci_host_bridge(bus->bridge),
+					    acpi_pci_root_release_info, info);
+		if (info->controller.node != NUMA_NO_NODE)
+			dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n",
+				   info->controller.node);
+		return bus;
+	}
+
+out_release_info:
+	__acpi_pci_root_release_info(info);
+	return NULL;
+}
+
 void __init acpi_pci_root_init(void)
 {
 	acpi_hest_init();
diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h
index 24c7728ca681..c237c97efe63 100644
--- a/include/linux/pci-acpi.h
+++ b/include/linux/pci-acpi.h
@@ -52,6 +52,30 @@ static inline acpi_handle acpi_pci_get_bridge_handle(struct pci_bus *pbus)
 	return ACPI_HANDLE(dev);
 }
 
+struct acpi_pci_root;
+struct acpi_pci_root_ops;
+
+struct acpi_pci_root_info_common {
+	struct pci_controller		controller;
+	struct acpi_pci_root		*root;
+	struct acpi_device		*bridge;
+	struct acpi_pci_root_ops	*ops;
+	struct list_head		resources;
+	char				name[16];
+};
+
+struct acpi_pci_root_ops {
+	struct pci_ops *pci_ops;
+	int (*init_info)(struct acpi_pci_root_info_common *info);
+	void (*release_info)(struct acpi_pci_root_info_common *info);
+	int (*prepare_resources)(struct acpi_pci_root_info_common *info,
+				 int status);
+};
+
+extern struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
+					    struct acpi_pci_root_ops *ops,
+					    size_t extra_size);
+
 void acpi_pci_add_bus(struct pci_bus *bus);
 void acpi_pci_remove_bus(struct pci_bus *bus);
 
-- 
1.7.10.4

[RFC 6/7] x86/PCI/ACPI: Use common interface to support PCI host bridge

[Jiang Liu]

Use common interface to simplify ACPI PCI host bridge implementation.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
---
 arch/x86/pci/acpi.c |  281 +++++++++++++--------------------------------------
 1 file changed, 72 insertions(+), 209 deletions(-)

diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index e7f35dc84801..b52a4d96bc89 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -4,13 +4,12 @@
 #include <linux/irq.h>
 #include <linux/dmi.h>
 #include <linux/slab.h>
+#include <linux/pci-acpi.h>
 #include <asm/numa.h>
 #include <asm/pci_x86.h>
 
 struct pci_root_info {
-	struct acpi_device *bridge;
-	char name[16];
-	struct pci_controller sd;
+	struct acpi_pci_root_info_common common;
 #ifdef	CONFIG_PCI_MMCONFIG
 	bool mcfg_added;
 	u16 segment;
@@ -165,14 +164,17 @@ static int check_segment(u16 seg, struct device *dev, char *estr)
 	return 0;
 }
 
-static int setup_mcfg_map(struct pci_root_info *info, u16 seg, u8 start,
-			  u8 end, phys_addr_t addr)
+static int setup_mcfg_map(struct acpi_pci_root_info_common *ci)
 {
 	int result;
-	struct device *dev = &info->bridge->dev;
+	struct pci_root_info *info;
+	struct acpi_pci_root *root = ci->root;
+	struct device *dev = &ci->bridge->dev;
+	int seg = ci->controller.segment;
 
-	info->start_bus = start;
-	info->end_bus = end;
+	info = container_of(ci, struct pci_root_info, common);
+	info->start_bus = (u8)root->secondary.start;
+	info->end_bus = (u8)root->secondary.end;
 	info->mcfg_added = false;
 
 	/* return success if MMCFG is not in use */
@@ -182,7 +184,8 @@ static int setup_mcfg_map(struct pci_root_info *info, u16 seg, u8 start,
 	if (!(pci_probe & PCI_PROBE_MMCONF))
 		return check_segment(seg, dev, "MMCONFIG is disabled,");
 
-	result = pci_mmconfig_insert(dev, seg, start, end, addr);
+	result = pci_mmconfig_insert(dev, seg, info->start_bus, info->end_bus,
+				     root->mcfg_addr);
 	if (result == 0) {
 		/* enable MMCFG if it hasn't been enabled yet */
 		if (raw_pci_ext_ops == NULL)
@@ -195,8 +198,11 @@ static int setup_mcfg_map(struct pci_root_info *info, u16 seg, u8 start,
 	return 0;
 }
 
-static void teardown_mcfg_map(struct pci_root_info *info)
+static void teardown_mcfg_map(struct acpi_pci_root_info_common *ci)
 {
+	struct pci_root_info *info;
+
+	info = container_of(ci, struct pci_root_info, common);
 	if (info->mcfg_added) {
 		pci_mmconfig_delete(info->segment, info->start_bus,
 				    info->end_bus);
@@ -204,170 +210,80 @@ static void teardown_mcfg_map(struct pci_root_info *info)
 	}
 }
 #else
-static int setup_mcfg_map(struct pci_root_info *info,
-				    u16 seg, u8 start, u8 end,
-				    phys_addr_t addr)
+static int setup_mcfg_map(struct acpi_pci_root_info_common *ci)
 {
 	return 0;
 }
-static void teardown_mcfg_map(struct pci_root_info *info)
+
+static void teardown_mcfg_map(struct acpi_pci_root_info_common *ci)
 {
 }
 #endif
 
-static void validate_resources(struct device *dev, struct list_head *crs_res,
-			       unsigned long type)
+static int pci_acpi_root_get_node(struct acpi_pci_root *root)
 {
-	LIST_HEAD(list);
-	struct resource *res1, *res2, *root = NULL;
-	struct resource_entry *tmp, *entry, *entry2;
-
-	BUG_ON((type & (IORESOURCE_MEM | IORESOURCE_IO)) == 0);
-	root = (type & IORESOURCE_MEM) ? &iomem_resource : &ioport_resource;
-
-	list_splice_init(crs_res, &list);
-	resource_list_for_each_entry_safe(entry, tmp, &list) {
-		bool free = false;
-		resource_size_t end;
-
-		res1 = entry->res;
-		if (!(res1->flags & type))
-			goto next;
-
-		/* Exclude non-addressable range or non-addressable portion */
-		end = min(res1->end, root->end);
-		if (end <= res1->start) {
-			dev_info(dev, "host bridge window %pR (ignored, not CPU addressable)\n",
-				 res1);
-			free = true;
-			goto next;
-		} else if (res1->end != end) {
-			dev_info(dev, "host bridge window %pR ([%#llx-%#llx] ignored, not CPU addressable)\n",
-				 res1, (unsigned long long)end + 1,
-				 (unsigned long long)res1->end);
-			res1->end = end;
-		}
-
-		resource_list_for_each_entry(entry2, crs_res) {
-			res2 = entry2->res;
-			if (!(res2->flags & type))
-				continue;
-
-			/*
-			 * I don't like throwing away windows because then
-			 * our resources no longer match the ACPI _CRS, but
-			 * the kernel resource tree doesn't allow overlaps.
-			 */
-			if (resource_overlaps(res1, res2)) {
-				res2->start = min(res1->start, res2->start);
-				res2->end = max(res1->end, res2->end);
-				dev_info(dev, "host bridge window expanded to %pR; %pR ignored\n",
-					 res2, res1);
-				free = true;
-				goto next;
-			}
-		}
-
-next:
-		resource_list_del(entry);
-		if (free)
-			resource_list_free_entry(entry);
-		else
-			resource_list_add_tail(entry, crs_res);
+	int busnum = root->secondary.start;
+	struct acpi_device *device = root->device;
+	int node = acpi_get_node(device->handle);
+
+	if (node == NUMA_NO_NODE) {
+		node = x86_pci_root_bus_node(busnum);
+		if (node != 0 && node != NUMA_NO_NODE)
+			dev_info(&device->dev, FW_BUG "no _PXM; falling back to node %d from hardware (may be inconsistent with ACPI node numbers)\n",
+				node);
 	}
+	if (node != NUMA_NO_NODE && !node_online(node))
+		node = NUMA_NO_NODE;
+
+	return node;
 }
 
-static void add_resources(struct pci_root_info *info,
-			  struct list_head *resources,
-			  struct list_head *crs_res)
+static int pci_acpi_root_init_info(struct acpi_pci_root_info_common *ci)
 {
-	struct resource_entry *entry, *tmp;
-	struct resource *res, *conflict, *root = NULL;
-
-	validate_resources(&info->bridge->dev, crs_res, IORESOURCE_MEM);
-	validate_resources(&info->bridge->dev, crs_res, IORESOURCE_IO);
-
-	resource_list_for_each_entry_safe(entry, tmp, crs_res) {
-		res = entry->res;
-		if (res->flags & IORESOURCE_MEM)
-			root = &iomem_resource;
-		else if (res->flags & IORESOURCE_IO)
-			root = &ioport_resource;
-		else
-			BUG_ON(res);
-
-		conflict = insert_resource_conflict(root, res);
-		if (conflict) {
-			dev_info(&info->bridge->dev,
-				 "ignoring host bridge window %pR (conflicts with %s %pR)\n",
-				 res, conflict->name, conflict);
-			resource_list_destroy_entry(entry);
-		}
-	}
+	ci->controller.node = pci_acpi_root_get_node(ci->root);
+	if (pci_ignore_seg)
+		ci->controller.segment = 0;
 
-	list_splice_tail(crs_res, resources);
+	return setup_mcfg_map(ci);
 }
 
-static void release_pci_root_info(struct pci_host_bridge *bridge)
+static void pci_acpi_root_release_info(struct acpi_pci_root_info_common *ci)
 {
-	struct resource *res;
-	struct resource_entry *entry;
-	struct pci_root_info *info = bridge->release_data;
-
-	resource_list_for_each_entry(entry, &bridge->windows) {
-		res = entry->res;
-		if (res->parent &&
-		    (res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
-			release_resource(res);
-	}
-
-	teardown_mcfg_map(info);
-	kfree(info);
+	teardown_mcfg_map(ci);
 }
 
-static void probe_pci_root_info(struct pci_root_info *info,
-				struct acpi_device *device,
-				int busnum, int domain,
-				struct list_head *list)
+static int pci_acpi_root_prepare_resources(struct acpi_pci_root_info_common *ci,
+					   int status)
 {
-	int ret;
+	struct acpi_device *device = ci->bridge;
+	int busnum = ci->root->secondary.start;
 	struct resource_entry *entry, *tmp;
-	unsigned long res_flags;
-
-	sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);
-	info->bridge = device;
-	res_flags = IORESOURCE_IO | IORESOURCE_MEM |
-		    IORESOURCE_WINDOW | IORESOURCE_MEM_8AND16BIT;
-	ret = acpi_dev_get_resources(device, list,
-				     acpi_dev_filter_resource_type_cb,
-				     (void *)res_flags);
-	if (ret < 0)
-		dev_warn(&device->dev,
-			 "failed to parse _CRS method, error code %d\n", ret);
-	else if (ret == 0)
-		dev_dbg(&device->dev,
-			"no IO and memory resources present in _CRS\n");
-	else
-		resource_list_for_each_entry_safe(entry, tmp, list) {
-			if (entry->res->flags & IORESOURCE_DISABLED)
-				resource_list_destroy_entry(entry);
-			else
-				entry->res->name = info->name;
-		}
+
+	if (pci_use_crs)
+		return status;
+
+	resource_list_for_each_entry_safe(entry, tmp, &ci->resources) {
+		dev_printk(KERN_DEBUG, &device->dev,
+			   "host bridge window %pR (ignored)\n", entry->res);
+		resource_list_destroy_entry(entry);
+	}
+	x86_pci_root_bus_resources(busnum, &ci->resources);
+
+	return 0;
 }
 
+static struct acpi_pci_root_ops acpi_pci_root_ops = {
+	.pci_ops = &pci_root_ops,
+	.init_info = pci_acpi_root_init_info,
+	.release_info = pci_acpi_root_release_info,
+	.prepare_resources = pci_acpi_root_prepare_resources,
+};
+
 struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
 {
-	struct acpi_device *device = root->device;
-	struct pci_root_info *info;
 	int domain = root->segment;
 	int busnum = root->secondary.start;
-	struct resource_entry *res_entry;
-	LIST_HEAD(crs_res);
-	LIST_HEAD(resources);
 	struct pci_bus *bus;
-	struct pci_controller *sd;
-	int node;
 
 	if (pci_ignore_seg)
 		domain = 0;
@@ -379,72 +295,22 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
 		return NULL;
 	}
 
-	node = acpi_get_node(device->handle);
-	if (node == NUMA_NO_NODE) {
-		node = x86_pci_root_bus_node(busnum);
-		if (node != 0 && node != NUMA_NO_NODE)
-			dev_info(&device->dev, FW_BUG "no _PXM; falling back to node %d from hardware (may be inconsistent with ACPI node numbers)\n",
-				node);
-	}
-
-	if (node != NUMA_NO_NODE && !node_online(node))
-		node = NUMA_NO_NODE;
-
-	info = kzalloc_node(sizeof(*info), GFP_KERNEL, node);
-	if (!info) {
-		printk(KERN_WARNING "pci_bus %04x:%02x: "
-		       "ignored (out of memory)\n", domain, busnum);
-		return NULL;
-	}
-
-	sd = &info->sd;
-	sd->segment = domain;
-	sd->node = node;
-	sd->companion = device;
-
 	bus = pci_find_bus(domain, busnum);
 	if (bus) {
 		/*
 		 * If the desired bus has been scanned already, replace
 		 * its bus->sysdata.
 		 */
-		memcpy(bus->sysdata, sd, sizeof(*sd));
-		kfree(info);
+		struct pci_controller sd = {
+			.segment = domain,
+			.node = pci_acpi_root_get_node(root),
+			.companion = root->device
+		};
+		memcpy(bus->sysdata, &sd, sizeof(sd));
 	} else {
-		/* insert busn res at first */
-		pci_add_resource(&resources,  &root->secondary);
-
-		/*
-		 * _CRS with no apertures is normal, so only fall back to
-		 * defaults or native bridge info if we're ignoring _CRS.
-		 */
-		probe_pci_root_info(info, device, busnum, domain, &crs_res);
-		if (pci_use_crs) {
-			add_resources(info, &resources, &crs_res);
-		} else {
-			resource_list_for_each_entry(res_entry, &crs_res)
-				dev_printk(KERN_DEBUG, &device->dev,
-					   "host bridge window %pR (ignored)\n",
-					   res_entry->res);
-			resource_list_free(&crs_res);
-			x86_pci_root_bus_resources(busnum, &resources);
-		}
-
-		if (!setup_mcfg_map(info, domain, (u8)root->secondary.start,
-				    (u8)root->secondary.end, root->mcfg_addr))
-			bus = pci_create_root_bus(NULL, busnum, &pci_root_ops,
-						  sd, &resources);
-
-		if (bus) {
-			pci_scan_child_bus(bus);
-			pci_set_host_bridge_release(
-				to_pci_host_bridge(bus->bridge),
-				release_pci_root_info, info);
-		} else {
-			resource_list_free(&resources);
-			teardown_mcfg_map(info);
-			kfree(info);
-		}
+		struct pci_root_info *info;
+		bus = acpi_pci_root_create(root, &acpi_pci_root_ops,
+					sizeof(*info) - sizeof(info->common));
 	}
 
 	/* After the PCI-E bus has been walked and all devices discovered,
@@ -456,9 +322,6 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
 			pcie_bus_configure_settings(child);
 	}
 
-	if (bus && node != NUMA_NO_NODE)
-		dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
-
 	return bus;
 }
 
-- 
1.7.10.4

[RFC 7/7] ia64/PCI/ACPI: Use common interface to support PCI host bridge

[Jiang Liu]

Use common interface to simplify PCI host bridge implementation.

Tested-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
---
 arch/ia64/pci/pci.c |  243 +++++++++++----------------------------------------
 1 file changed, 49 insertions(+), 194 deletions(-)

diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index c5630dd5e181..efd78cea6a1e 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -116,15 +116,11 @@ struct pci_ops pci_root_ops = {
 };
 
 struct pci_root_info {
-	struct pci_controller controller;
-	struct acpi_device *bridge;
-	struct list_head resources;
+	struct acpi_pci_root_info_common common;
 	struct list_head io_resources;
-	char name[16];
 };
 
-static unsigned int
-new_space (u64 phys_base, int sparse)
+static unsigned int new_space(u64 phys_base, int sparse)
 {
 	u64 mmio_base;
 	int i;
@@ -160,11 +156,11 @@ static int add_io_space(struct device *dev, struct pci_root_info *info,
 	unsigned long base, min, max, base_port;
 	unsigned int sparse = 0, space_nr, len;
 
-	len = strlen(info->name) + 32;
+	len = strlen(info->common.name) + 32;
 	iospace = resource_list_create_entry(NULL, len);
 	if (!iospace) {
 		dev_err(dev, "PCI: No memory for %s I/O port space\n",
-			info->name);
+			info->common.name);
 		return -ENOMEM;
 	}
 
@@ -179,7 +175,7 @@ static int add_io_space(struct device *dev, struct pci_root_info *info,
 	max = res->end - entry->offset;
 	base = __pa(io_space[space_nr].mmio_base);
 	base_port = IO_SPACE_BASE(space_nr);
-	snprintf(name, len, "%s I/O Ports %08lx-%08lx", info->name,
+	snprintf(name, len, "%s I/O Ports %08lx-%08lx", info->common.name,
 		 base_port + min, base_port + max);
 
 	/*
@@ -214,216 +210,75 @@ free_resource:
 	return -ENOSPC;
 }
 
-static int
-probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device,
-		    int busnum, int domain)
+static int pci_acpi_root_prepare_resources(struct acpi_pci_root_info_common *ci,
+					   int status)
 {
-	int ret;
-	struct list_head *list = &info->resources;
+	struct device *dev = &ci->bridge->dev;
+	struct pci_root_info *info;
+	struct resource *res;
 	struct resource_entry *entry, *tmp;
 
-	ret = acpi_dev_get_resources(device, list,
-				     acpi_dev_filter_resource_type_cb,
-				     (void *)(IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_WINDOW));
-	if (ret < 0)
-		dev_warn(&device->dev,
-			 "failed to parse _CRS method, error code %d\n", ret);
-	else if (ret == 0)
-		dev_dbg(&device->dev,
-			"no IO and memory resources present in _CRS\n");
-	else
-		resource_list_for_each_entry_safe(entry, tmp, list) {
-			if (entry->res->flags & IORESOURCE_DISABLED)
-				resource_list_destroy_entry(entry);
-			else
-				entry->res->name = info->name;
+	if (status > 0) {
+		info = container_of(ci, struct pci_root_info, common);
+		resource_list_for_each_entry_safe(entry, tmp, &ci->resources) {
+			res = entry->res;
+			if (res->flags & IORESOURCE_MEM) {
+				/*
+				 * HP's firmware has a hack to work around a
+				 * Windows bug. Ignore these tiny memory ranges.
+				 */
+				if (resource_size(res) <= 16) {
+					resource_list_del(entry);
+					insert_resource(&iomem_resource,
+							entry->res);
+					resource_list_add_tail(entry,
+							&info->io_resources);
+				}
+			} else if (res->flags & IORESOURCE_IO) {
+				if (add_io_space(dev, info, entry))
+					resource_list_destroy_entry(entry);
+			}
 		}
+	}
 
-	return ret;
+	return status;
 }
 
-static void validate_resources(struct device *dev, struct list_head *resources,
-			       unsigned long type)
+static int pci_acpi_root_init_info(struct acpi_pci_root_info_common *ci)
 {
-	LIST_HEAD(list);
-	struct resource *res1, *res2, *root = NULL;
-	struct resource_entry *tmp, *entry, *entry2;
-
-	BUG_ON((type & (IORESOURCE_MEM | IORESOURCE_IO)) == 0);
-	root = (type & IORESOURCE_MEM) ? &iomem_resource : &ioport_resource;
-
-	list_splice_init(resources, &list);
-	resource_list_for_each_entry_safe(entry, tmp, &list) {
-		bool free = false;
-		resource_size_t end;
-
-		res1 = entry->res;
-		if (!(res1->flags & type))
-			goto next;
-
-		/* Exclude non-addressable range or non-addressable portion */
-		end = min(res1->end, root->end);
-		if (end <= res1->start) {
-			dev_info(dev, "host bridge window %pR (ignored, not CPU addressable)\n",
-				 res1);
-			free = true;
-			goto next;
-		} else if (res1->end != end) {
-			dev_info(dev, "host bridge window %pR ([%#llx-%#llx] ignored, not CPU addressable)\n",
-				 res1, (unsigned long long)end + 1,
-				 (unsigned long long)res1->end);
-			res1->end = end;
-		}
+	struct pci_root_info *info;
 
-		resource_list_for_each_entry(entry2, resources) {
-			res2 = entry2->res;
-			if (!(res2->flags & type))
-				continue;
-
-			/*
-			 * I don't like throwing away windows because then
-			 * our resources no longer match the ACPI _CRS, but
-			 * the kernel resource tree doesn't allow overlaps.
-			 */
-			if (resource_overlaps(res1, res2)) {
-				res2->start = min(res1->start, res2->start);
-				res2->end = max(res1->end, res2->end);
-				dev_info(dev, "host bridge window expanded to %pR; %pR ignored\n",
-					 res2, res1);
-				free = true;
-				goto next;
-			}
-		}
+	info = container_of(ci, struct pci_root_info, common);
+	INIT_LIST_HEAD(&info->io_resources);
 
-next:
-		resource_list_del(entry);
-		if (free)
-			resource_list_free_entry(entry);
-		else
-			resource_list_add_tail(entry, resources);
-	}
+	return 0;
 }
 
-static void add_resources(struct pci_root_info *info, struct device *dev)
+static void pci_acpi_root_release_info(struct acpi_pci_root_info_common *ci)
 {
+	struct pci_root_info *info;
 	struct resource_entry *entry, *tmp;
-	struct resource *res, *conflict, *root = NULL;
-	struct list_head *list = &info->resources;
-
-	validate_resources(dev, list, IORESOURCE_MEM);
-	validate_resources(dev, list, IORESOURCE_IO);
-
-	resource_list_for_each_entry_safe(entry, tmp, list) {
-		res = entry->res;
-		if (res->flags & IORESOURCE_MEM) {
-			root = &iomem_resource;
-			/*
-			 * HP's firmware has a hack to work around a Windows
-			 * bug. Ignore these tiny memory ranges.
-			 */
-			if (resource_size(res) <= 16) {
-				resource_list_destroy_entry(entry);
-				continue;
-			}
-		} else if (res->flags & IORESOURCE_IO) {
-			root = &ioport_resource;
-			if (add_io_space(&info->bridge->dev, info, entry)) {
-				resource_list_destroy_entry(entry);
-				continue;
-			}
-		} else {
-			BUG_ON(res);
-		}
-
-		conflict = insert_resource_conflict(root, res);
-		if (conflict) {
-			dev_info(dev,
-				 "ignoring host bridge window %pR (conflicts with %s %pR)\n",
-				 res, conflict->name, conflict);
-			resource_list_destroy_entry(entry);
-		}
-	}
-}
 
-static void __release_pci_root_info(struct pci_root_info *info)
-{
-	struct resource *res;
-	struct resource_entry *entry, *tentry;
-
-	resource_list_for_each_entry_safe(entry, tentry, &info->io_resources) {
+	info = container_of(ci, struct pci_root_info, common);
+	resource_list_for_each_entry_safe(entry, tmp, &info->io_resources) {
 		release_resource(entry->res);
 		resource_list_destroy_entry(entry);
 	}
-
-	resource_list_for_each_entry_safe(entry, tentry, &info->resources) {
-		res = entry->res;
-		if (res->parent &&
-		    (res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
-			release_resource(res);
-		resource_list_destroy_entry(entry);
-	}
-
-	kfree(info);
 }
 
-static void release_pci_root_info(struct pci_host_bridge *bridge)
-{
-	struct pci_root_info *info = bridge->release_data;
-
-	__release_pci_root_info(info);
-}
+static struct acpi_pci_root_ops pci_acpi_root_ops = {
+	.pci_ops = &pci_root_ops,
+	.init_info = pci_acpi_root_init_info,
+	.release_info = pci_acpi_root_release_info,
+	.prepare_resources = pci_acpi_root_prepare_resources,
+};
 
 struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
 {
-	struct acpi_device *device = root->device;
-	int domain = root->segment;
-	int bus = root->secondary.start;
 	struct pci_root_info *info;
-	struct pci_bus *pbus;
-	int ret;
-
-	info = kzalloc(sizeof(*info), GFP_KERNEL);
-	if (!info) {
-		dev_err(&device->dev,
-			"pci_bus %04x:%02x: ignored (out of memory)\n",
-			domain, bus);
-		return NULL;
-	}
-
-	info->controller.segment = domain;
-	info->controller.companion = device;
-	info->controller.node = acpi_get_node(device->handle);
-	info->bridge = device;
-	INIT_LIST_HEAD(&info->resources);
-	INIT_LIST_HEAD(&info->io_resources);
-	snprintf(info->name, sizeof(info->name),
-		 "PCI Bus %04x:%02x", domain, bus);
-
-	ret = probe_pci_root_info(info, device, bus, domain);
-	if (ret <= 0) {
-		kfree(info);
-		return NULL;
-	}
-	add_resources(info, &info->bridge->dev);
-	pci_add_resource(&info->resources, &root->secondary);
-
-	/*
-	 * See arch/x86/pci/acpi.c.
-	 * The desired pci bus might already be scanned in a quirk. We
-	 * should handle the case here, but it appears that IA64 hasn't
-	 * such quirk. So we just ignore the case now.
-	 */
-	pbus = pci_create_root_bus(NULL, bus, &pci_root_ops,
-				   &info->controller, &info->resources);
-	if (!pbus) {
-		__release_pci_root_info(info);
-		return NULL;
-	}
 
-	pci_set_host_bridge_release(to_pci_host_bridge(pbus->bridge),
-			release_pci_root_info, info);
-	pci_scan_child_bus(pbus);
-	return pbus;
+	return acpi_pci_root_create(root, &pci_acpi_root_ops,
+				    sizeof(*info) - sizeof(info->common));
 }
 
 int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
-- 
1.7.10.4

Re: [RFC 0/7] Consolidate common ACPI PCI host bridge code into ACPI core

[Rafael J. Wysocki]

On Tuesday, April 07, 2015 12:31:05 PM Jiang Liu wrote:
> As suggested by Bjorn, this patch set consolidates common ACPI PCI host
> bridge code from x86 and IA64 into ACPI core. It may also help to
> support ACPI PCI host bridge on ARM64 platfrom too in future.
> 
> It introduces struct acpi_pci_root_ops and acpi_pci_root_create().
> Arch code only needs to implement struct acpi_pci_root_ops and then
> invoke acpi_pci_root_create() to parse ACPI resources and create
> PCI root bus.
> struct acpi_pci_root_info_common {
>         struct pci_controller           controller;
>         struct acpi_pci_root            *root;
>         struct acpi_device              *bridge;
>         struct acpi_pci_root_ops        *ops;
>         struct list_head                resources;
>         char                            name[16];
> };
> struct acpi_pci_root_ops {
> 	struct pci_ops *pci_ops;
> 	int (*init_info)(struct acpi_pci_root_info_common *info);
> 	void (*release_info)(struct acpi_pci_root_info_common *info);
> 	int (*prepare_resources)(struct acpi_pci_root_info_common *info,
> 				 int status);
> };
> extern struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
> 					    struct acpi_pci_root_ops *ops,
> 					    size_t extra_size);
> It passes Fengguang's 0day test suite and has been tested on 
> 1) An Intel x86 4 socket platform
> 2) An Intel IA64 SDV
> 3) An HP IA64 platform
> 
> And you may access it at:
> https://github.com/jiangliu/linux.git acpi_pci_root_v1
> 
> Thanks!
> Gerry
> 
> Jiang Liu (7):
>   ACPI/PCI: Enhance ACPI core to support sparse IO space
>   ia64/PCI/ACPI: Use common ACPI resource parsing interface for host
>     bridge
>   ia64/PCI: Use common struct resource_entry to replace struct
>     iospace_resource
>   x86/PCI: Rename struct pci_sysdata as struct pci_controller
>   PCI/ACPI: Consolidate common PCI host bridge code into ACPI core
>   x86/PCI/ACPI: Use common interface to support PCI host bridge
>   ia64/PCI/ACPI: Use common interface to support PCI host bridge
> 
>  arch/ia64/include/asm/pci.h   |    5 -
>  arch/ia64/pci/pci.c           |  360 ++++++++++-------------------------------
>  arch/x86/include/asm/pci.h    |   12 +-
>  arch/x86/include/asm/pci_64.h |    4 +-
>  arch/x86/pci/acpi.c           |  283 +++++++++-----------------------
>  arch/x86/pci/common.c         |    2 +-
>  drivers/acpi/pci_root.c       |  215 ++++++++++++++++++++++++
>  drivers/acpi/resource.c       |    9 +-
>  include/linux/ioport.h        |    1 +
>  include/linux/pci-acpi.h      |   24 +++
>  10 files changed, 409 insertions(+), 506 deletions(-)

That's generally fine by me, but let's fix the resources issue first, shall we?


-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.

Re: [RFC 0/7] Consolidate common ACPI PCI host bridge code into ACPI core

[Jiang Liu]

On 2015/4/7 19:48, Rafael J. Wysocki wrote:
> On Tuesday, April 07, 2015 12:31:05 PM Jiang Liu wrote:
>> As suggested by Bjorn, this patch set consolidates common ACPI PCI host
>> bridge code from x86 and IA64 into ACPI core. It may also help to
>> support ACPI PCI host bridge on ARM64 platfrom too in future.
>>
>> It introduces struct acpi_pci_root_ops and acpi_pci_root_create().
>> Arch code only needs to implement struct acpi_pci_root_ops and then
>> invoke acpi_pci_root_create() to parse ACPI resources and create
>> PCI root bus.
>> struct acpi_pci_root_info_common {
>>         struct pci_controller           controller;
>>         struct acpi_pci_root            *root;
>>         struct acpi_device              *bridge;
>>         struct acpi_pci_root_ops        *ops;
>>         struct list_head                resources;
>>         char                            name[16];
>> };
>> struct acpi_pci_root_ops {
>> 	struct pci_ops *pci_ops;
>> 	int (*init_info)(struct acpi_pci_root_info_common *info);
>> 	void (*release_info)(struct acpi_pci_root_info_common *info);
>> 	int (*prepare_resources)(struct acpi_pci_root_info_common *info,
>> 				 int status);
>> };
>> extern struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root,
>> 					    struct acpi_pci_root_ops *ops,
>> 					    size_t extra_size);
>> It passes Fengguang's 0day test suite and has been tested on 
>> 1) An Intel x86 4 socket platform
>> 2) An Intel IA64 SDV
>> 3) An HP IA64 platform
>>
>> And you may access it at:
>> https://github.com/jiangliu/linux.git acpi_pci_root_v1
>>
>> Thanks!
>> Gerry
>>
>> Jiang Liu (7):
>>   ACPI/PCI: Enhance ACPI core to support sparse IO space
>>   ia64/PCI/ACPI: Use common ACPI resource parsing interface for host
>>     bridge
>>   ia64/PCI: Use common struct resource_entry to replace struct
>>     iospace_resource
>>   x86/PCI: Rename struct pci_sysdata as struct pci_controller
>>   PCI/ACPI: Consolidate common PCI host bridge code into ACPI core
>>   x86/PCI/ACPI: Use common interface to support PCI host bridge
>>   ia64/PCI/ACPI: Use common interface to support PCI host bridge
>>
>>  arch/ia64/include/asm/pci.h   |    5 -
>>  arch/ia64/pci/pci.c           |  360 ++++++++++-------------------------------
>>  arch/x86/include/asm/pci.h    |   12 +-
>>  arch/x86/include/asm/pci_64.h |    4 +-
>>  arch/x86/pci/acpi.c           |  283 +++++++++-----------------------
>>  arch/x86/pci/common.c         |    2 +-
>>  drivers/acpi/pci_root.c       |  215 ++++++++++++++++++++++++
>>  drivers/acpi/resource.c       |    9 +-
>>  include/linux/ioport.h        |    1 +
>>  include/linux/pci-acpi.h      |   24 +++
>>  10 files changed, 409 insertions(+), 506 deletions(-)
> 
> That's generally fine by me, but let's fix the resources issue first, shall we?
Hi Rafael,
	Absolutely we should fix the bug first. Actually this patch set is
based on the ACPI resource bugfixing patch. There are too many
patches pending in my hand, so I send out this patch set earlier,
hoping we could catch up with v4.2.
Thanks!
Gerry