Currently, pcibios_resource_to_bus() and pcibios_bus_to_resource()
functions use pci_host_bridge to translate bus side address from/to
cpu side address. The pci_window in pci_controller never be used again.
So we remove pci_window in pci_controller and make pci_root_info hold
the pci hostbridge resources like in x86.
Signed-off-by: Yijing Wang <wangyijing@xxxxxxxxxx>
Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Cc: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Thierry Reding <thierry.reding@xxxxxxxxxxxxxxxxx>
Cc: linux-ia64@xxxxxxxxxxxxxxx
---
arch/ia64/include/asm/pci.h | 18 ++++++-----
arch/ia64/pci/pci.c | 68 ++++++++++++++++++++--------------------
arch/ia64/sn/kernel/io_init.c | 67 ++++++++++++++++++++++++---------------
3 files changed, 85 insertions(+), 68 deletions(-)
diff --git a/arch/ia64/include/asm/pci.h b/arch/ia64/include/asm/pci.h
index 5e04b59..82a236c 100644
--- a/arch/ia64/include/asm/pci.h
+++ b/arch/ia64/include/asm/pci.h
@@ -89,23 +89,25 @@ 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 pci_window {
- struct resource resource;
- u64 offset;
-};
-
struct pci_controller {
void *acpi_handle;
void *iommu;
int segment;
int node; /* nearest node with memory or -1 for global allocation */
- unsigned int windows;
- struct pci_window *window;
-
void *platform_data;
};
+struct pci_root_info {
+ struct acpi_device *bridge;
+ struct pci_controller *controller;
+ struct list_head resources;
+ struct resource *res;
+ resource_size_t *res_offset;
+ unsigned int res_num;
+ char *name;
+};
+
#define PCI_CONTROLLER(busdev) ((struct pci_controller *) busdev->sysdata)
#define pci_domain_nr(busdev) (PCI_CONTROLLER(busdev)->segment)
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index de1474f..d7681c6 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -130,12 +130,6 @@ static struct pci_controller *alloc_pci_controller(int seg)
return controller;
}
-struct pci_root_info {
- struct acpi_device *bridge;
- struct pci_controller *controller;
- struct list_head resources;
- char *name;
-};
static unsigned int
new_space (u64 phys_base, int sparse)
@@ -265,7 +259,7 @@ static acpi_status count_window(struct acpi_resource *resource, void *data)
static acpi_status add_window(struct acpi_resource *res, void *data)
{
struct pci_root_info *info = data;
- struct pci_window *window;
+ struct resource *resource;
struct acpi_resource_address64 addr;
acpi_status status;
unsigned long flags, offset = 0;
@@ -289,37 +283,36 @@ static acpi_status add_window(struct acpi_resource *res, void *data)
} else
return AE_OK;
- window = &info->controller->window[info->controller->windows++];
- window->resource.name = info->name;
- window->resource.flags = flags;
- window->resource.start = addr.minimum + offset;
- window->resource.end = window->resource.start + addr.address_length - 1;
- window->offset = offset;
+ resource = &info->res[info->res_num];
+ resource->name = info->name;
+ resource->flags = flags;
+ resource->start = addr.minimum + offset;
+ resource->end = resource->start + addr.address_length - 1;
+ info->res_offset[info->res_num] = offset;
- if (insert_resource(root, &window->resource)) {
+ if (insert_resource(root, resource)) {
dev_err(&info->bridge->dev,
"can't allocate host bridge window %pR\n",
- &window->resource);
+ resource);
} else {
if (offset)
dev_info(&info->bridge->dev, "host bridge window %pR "
"(PCI address [%#llx-%#llx])\n",
- &window->resource,
- window->resource.start - offset,
- window->resource.end - offset);
+ resource,
+ resource->start - offset,
+ resource->end - offset);
else
dev_info(&info->bridge->dev,
- "host bridge window %pR\n",
- &window->resource);
+ "host bridge window %pR\n", resource);
}
-
/* HP's firmware has a hack to work around a Windows bug.
* Ignore these tiny memory ranges */
- if (!((window->resource.flags & IORESOURCE_MEM) &&
- (window->resource.end - window->resource.start < 16)))
- pci_add_resource_offset(&info->resources, &window->resource,
- window->offset);
+ 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;
}
@@ -329,7 +322,6 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
int domain = root->segment;
int bus = root->secondary.start;
struct pci_controller *controller;
- unsigned int windows = 0;
struct pci_root_info info;
struct pci_bus *pbus;
char *name;
@@ -351,22 +343,29 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
/* insert busn resource at first */
pci_add_resource(&info.resources, &root->secondary);
acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_window,
- &windows);
- if (windows) {
- controller->window =
- kzalloc_node(sizeof(*controller->window) * windows,
+ &info.res_num);
+ if (info.res_num) {
+ info.res =
+ kzalloc_node(sizeof(*info.res) * info.res_num,
GFP_KERNEL, controller->node);
- if (!controller->window)
+ if (!info.res)
goto out2;
+
+ info.res_offset =
+ kzalloc_node(sizeof(*info.res_offset) * info.res_num,
+ GFP_KERNEL, controller->node);
+ if (!info.res_offset)
+ goto out3;
name = kmalloc(16, GFP_KERNEL);
if (!name)
- goto out3;
+ goto out4;
sprintf(name, "PCI Bus %04x:%02x", domain, bus);
info.bridge = device;
info.controller = controller;
info.name = name;
+ info.res_num = 0;
acpi_walk_resources(device->handle, METHOD_NAME__CRS,
add_window, &info);
}
@@ -385,9 +384,10 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
pci_scan_child_bus(pbus);
return pbus;
-
+out4:
+ kfree(info.res_offset);
out3:
- kfree(controller->window);
+ kfree(info.res);
out2:
kfree(controller);
out1:
diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
index 99710f5..86c2335 100644
--- a/arch/ia64/sn/kernel/io_init.c
+++ b/arch/ia64/sn/kernel/io_init.c
@@ -125,27 +125,39 @@ static void __init sn_fixup_ionodes(void)
* and their resources (_CRS),
*/
static void
-sn_legacy_pci_window_fixup(struct pci_controller *controller,
+sn_legacy_pci_window_fixup(struct pci_root_info *info,
u64 legacy_io, u64 legacy_mem)
{
- controller->window = kcalloc(2, sizeof(struct pci_window),
- GFP_KERNEL);
- BUG_ON(controller->window == NULL);
- controller->window[0].offset = legacy_io;
- controller->window[0].resource.name = "legacy_io";
- controller->window[0].resource.flags = IORESOURCE_IO;
- controller->window[0].resource.start = legacy_io;
- controller->window[0].resource.end =
- controller->window[0].resource.start + 0xffff;
- controller->window[0].resource.parent = &ioport_resource;
- controller->window[1].offset = legacy_mem;
- controller->window[1].resource.name = "legacy_mem";
- controller->window[1].resource.flags = IORESOURCE_MEM;
- controller->window[1].resource.start = legacy_mem;
- controller->window[1].resource.end =
- controller->window[1].resource.start + (1024 * 1024) - 1;
- controller->window[1].resource.parent = &iomem_resource;
- controller->windows = 2;
+ info->res_num = 2;
+ info->res = kzalloc(sizeof(*info->res) * info->res_num, GFP_KERNEL);
+ if (!info->res) {
+ info->res_num = 0;
+ return;
+ }
+
+ info->res_offset = kzalloc(sizeof(*info->res_offset) * info->res_num,
+ GFP_KERNEL);
+ if (!info->res_offset) {
+ kfree(info->res);
+ info->res = NULL;
+ info->res_num = 0;
+ return;
+ }
+
+ info->res_offset[0] = legacy_io;
+ info->res[0].name = "legacy_io";
+ info->res[0].flags = IORESOURCE_IO;
+ info->res[0].start = legacy_io;
+ info->res[0].end =
+ info->res[0].start + 0xffff;
+ info->res[0].parent = &ioport_resource;
+ info->res_offset[1] = legacy_mem;
+ info->res[1].name = "legacy_mem";
+ info->res[1].flags = IORESOURCE_MEM;
+ info->res[1].start = legacy_mem;
+ info->res[1].end =
+ info->res[1].start + (1024 * 1024) - 1;
+ info->res[1].parent = &iomem_resource;
}
/*
@@ -248,6 +260,7 @@ static void __init
sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
{
s64 status = 0;
+ struct pci_root_info info;
struct pci_controller *controller;
struct pcibus_bussoft *prom_bussoft_ptr;
LIST_HEAD(resources);
@@ -262,20 +275,21 @@ sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
controller = kzalloc(sizeof(*controller), GFP_KERNEL);
BUG_ON(!controller);
controller->segment = segment;
-
- /*
+ /*
* Temporarily save the prom_bussoft_ptr for use by sn_bus_fixup().
* (platform_data will be overwritten later in sn_common_bus_fixup())
*/
controller->platform_data = prom_bussoft_ptr;
+
+ info.controller = controller;
- sn_legacy_pci_window_fixup(controller,
+ sn_legacy_pci_window_fixup(&info,
prom_bussoft_ptr->bs_legacy_io,
prom_bussoft_ptr->bs_legacy_mem);
- for (i = 0; i < controller->windows; i++)
+ for (i = 0; i < info.res_num; i++)
pci_add_resource_offset(&resources,
- &controller->window[i].resource,
- controller->window[i].offset);
+ &info.res[i],
+ info.res_offset[i]);
bus = pci_scan_root_bus(NULL, busnum, &pci_root_ops, controller,
&resources);
if (bus == NULL)
@@ -286,8 +300,9 @@ sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
return;
error_return:
-
kfree(controller);
+ kfree(info.res);
+ kfree(info.res_offset);
return;
}
--
1.7.1
--
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