ARM/PCI: Move align_resource function pointer to pci_host_bridge structure

Commit b3a72384fe29 ("ARM/PCI: Replace pci_sys_data->align_resource with
global function pointer") introduced an ARM-specific align_resource()
function pointer.  This is not portable to other arches and doesn't work
for platforms with two different PCIe host bridge controllers.

Move the function pointer to the pci_host_bridge structure so each host
bridge driver can specify its own align_resource() function.

Signed-off-by: Gabriele Paoloni <gabriele.paoloni@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index 6551d28..066f7f9 100644 (file)
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -17,11 +17,6 @@
 #include <asm/mach/pci.h>
 
 static int debug_pci;
-static resource_size_t (*align_resource)(struct pci_dev *dev,
-                 const struct resource *res,
-                 resource_size_t start,
-                 resource_size_t size,
-                 resource_size_t align) = NULL;
 
 /*
  * We can't use pci_get_device() here since we are
@@ -461,7 +456,6 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
                sys->busnr   = busnr;
                sys->swizzle = hw->swizzle;
                sys->map_irq = hw->map_irq;
-               align_resource = hw->align_resource;
                INIT_LIST_HEAD(&sys->resources);
 
                if (hw->private_data)
@@ -470,6 +464,8 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
                ret = hw->setup(nr, sys);
 
                if (ret > 0) {
+                       struct pci_host_bridge *host_bridge;
+
                        ret = pcibios_init_resources(nr, sys);
                        if (ret)  {
                                kfree(sys);
@@ -491,6 +487,9 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
                        busnr = sys->bus->busn_res.end + 1;
 
                        list_add(&sys->node, head);
+
+                       host_bridge = pci_find_host_bridge(sys->bus);
+                       host_bridge->align_resource = hw->align_resource;
                } else {
                        kfree(sys);
                        if (ret < 0)
@@ -578,14 +577,18 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res,
 {
        struct pci_dev *dev = data;
        resource_size_t start = res->start;
+       struct pci_host_bridge *host_bridge;
 
        if (res->flags & IORESOURCE_IO && start & 0x300)
                start = (start + 0x3ff) & ~0x3ff;
 
        start = (start + align - 1) & ~(align - 1);
 
-       if (align_resource)
-               return align_resource(dev, res, start, size, align);
+       host_bridge = pci_find_host_bridge(dev->bus);
+
+       if (host_bridge->align_resource)
+               return host_bridge->align_resource(dev, res,
+                               start, size, align);
 
        return start;
 }

diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index fd2f03f..d390fc1 100644 (file)
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -337,6 +337,4 @@ static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
 }
 #endif
 
-struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);
-
 #endif /* DRIVERS_PCI_H */

diff --git a/include/linux/pci.h b/include/linux/pci.h
index e828e7b..6ae25aa 100644 (file)
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -412,9 +412,18 @@ struct pci_host_bridge {
        void (*release_fn)(struct pci_host_bridge *);
        void *release_data;
        unsigned int ignore_reset_delay:1;      /* for entire hierarchy */
+       /* Resource alignment requirements */
+       resource_size_t (*align_resource)(struct pci_dev *dev,
+                       const struct resource *res,
+                       resource_size_t start,
+                       resource_size_t size,
+                       resource_size_t align);
 };
 
 #define        to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
+
+struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);
+
 void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
                     void (*release_fn)(struct pci_host_bridge *),
                     void *release_data);