drm: Use resource_size_t for drm_get_resource_{start, len}

The DRM uses its own wrappers to obtain resources from PCI devices,
which currently convert the resource_size_t into an unsigned long.

This is broken on 32-bit platforms with >32-bit physical address
space.

This fixes them, along with a few occurences of unsigned long used
to store such a resource in drivers.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Dave Airlie <airlied@linux.ie>

drivers/gpu/drm/drm_bufs.c

@@ -36,13 +36,13 @@
 #include <linux/vmalloc.h>
 #include "drmP.h"
 
-unsigned long drm_get_resource_start(struct drm_device *dev, unsigned int resource)
+resource_size_t drm_get_resource_start(struct drm_device *dev, unsigned int resource)
 {
 	return pci_resource_start(dev->pdev, resource);
 }
 EXPORT_SYMBOL(drm_get_resource_start);
 
-unsigned long drm_get_resource_len(struct drm_device *dev, unsigned int resource)
+resource_size_t drm_get_resource_len(struct drm_device *dev, unsigned int resource)
 {
 	return pci_resource_len(dev->pdev, resource);
 }

drivers/gpu/drm/i915/i915_dma.c

@@ -1057,7 +1057,7 @@ void i915_master_destroy(struct drm_device *dev, struct drm_master *master)
 int i915_driver_load(struct drm_device *dev, unsigned long flags)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	unsigned long base, size;
+	resource_size_t base, size;
 	int ret = 0, mmio_bar = IS_I9XX(dev) ? 0 : 1;
 
 	/* i915 has 4 more counters */

drivers/gpu/drm/mga/mga_drv.h

@@ -113,8 +113,8 @@ typedef struct drm_mga_private {
 	 * \sa drm_mga_private_t::mmio
 	 */
 	/*@{ */
-	u32 mmio_base;		   /**< Bus address of base of MMIO. */
-	u32 mmio_size;		   /**< Size of the MMIO region. */
+	resource_size_t mmio_base;	   /**< Bus address of base of MMIO. */
+	resource_size_t mmio_size;	   /**< Size of the MMIO region. */
 	/*@} */
 
 	u32 clear_cmd;

drivers/gpu/drm/radeon/radeon_drv.h

@@ -316,7 +316,7 @@ typedef struct drm_radeon_private {
 
 	/* starting from here on, data is preserved accross an open */
 	uint32_t flags;		/* see radeon_chip_flags */
-	unsigned long fb_aper_offset;
+	resource_size_t fb_aper_offset;
 
 	int num_gb_pipes;
 	int track_flush;

drivers/gpu/drm/savage/savage_bci.c

@@ -599,8 +599,8 @@ int savage_driver_firstopen(struct drm_device *dev)
 			    drm_mtrr_add(dev_priv->mtrr[2].base,
 					 dev_priv->mtrr[2].size, DRM_MTRR_WC);
 		} else {
-			DRM_ERROR("strange pci_resource_len %08lx\n",
-				  drm_get_resource_len(dev, 0));
+			DRM_ERROR("strange pci_resource_len %08llx\n",
+				  (unsigned long long)drm_get_resource_len(dev, 0));
 		}
 	} else if (dev_priv->chipset != S3_SUPERSAVAGE &&
 		   dev_priv->chipset != S3_SAVAGE2000) {
@@ -620,8 +620,8 @@ int savage_driver_firstopen(struct drm_device *dev)
 			    drm_mtrr_add(dev_priv->mtrr[0].base,
 					 dev_priv->mtrr[0].size, DRM_MTRR_WC);
 		} else {
-			DRM_ERROR("strange pci_resource_len %08lx\n",
-				  drm_get_resource_len(dev, 1));
+			DRM_ERROR("strange pci_resource_len %08llx\n",
+				  (unsigned long long)drm_get_resource_len(dev, 1));
 		}
 	} else {
 		mmio_base = drm_get_resource_start(dev, 0);

include/drm/drmP.h

@@ -1173,10 +1173,10 @@ extern int drm_freebufs(struct drm_device *dev, void *data,
 extern int drm_mapbufs(struct drm_device *dev, void *data,
 		       struct drm_file *file_priv);
 extern int drm_order(unsigned long size);
-extern unsigned long drm_get_resource_start(struct drm_device *dev,
+extern resource_size_t drm_get_resource_start(struct drm_device *dev,
+					      unsigned int resource);
+extern resource_size_t drm_get_resource_len(struct drm_device *dev,
 					    unsigned int resource);
-extern unsigned long drm_get_resource_len(struct drm_device *dev,
-					  unsigned int resource);
 
 				/* DMA support (drm_dma.h) */
 extern int drm_dma_setup(struct drm_device *dev);

include/drm/drm_crtc.h

@@ -550,7 +550,7 @@ struct drm_mode_config {
 	int min_width, min_height;
 	int max_width, max_height;
 	struct drm_mode_config_funcs *funcs;
-	unsigned long fb_base;
+	resource_size_t fb_base;
 
 	/* pointers to standard properties */
 	struct list_head property_blob_list;