[Patch] DRM support for addressing >32 bits on 32 bit cores (Radeon DRM driver+TTM)

[Andrej Krutak <andrej.krutak@sysgo.com>]

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Hello,

I was advised to send this stuff here ( 
https://bugs.freedesktop.org/show_bug.cgi?id=18154 ).

The patches are tested with a P3041 board and a TURKS radeon card. It appears 
that the radeon driver is already generic enough (so no major changes were 
needed there), fortunately.

I think esp. the TTM patch is clearly needed, but it may be incomplete...

-- 
Best regards | S pozdravom | Mit freundlichen Grüßen | Cordialement

Andrej Krutak

[-- Attachment #2: radeon.patch --]
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Allow > 32-bit physical addresses in mmio base info text.
--- linux-ppc-3.12/drivers/gpu/drm/radeon/radeon_device.c	2014-08-05 13:47:28.254522980 +0200
+++ linux-ppc-3.12/drivers/gpu/drm/radeon/radeon_device.c	2014-08-05 13:58:40.648549673 +0200
@@ -258,7 +258,7 @@ int radeon_doorbell_init(struct radeon_d
 	if (rdev->doorbell.ptr == NULL) {
 		return -ENOMEM;
 	}
-	DRM_INFO("doorbell mmio base: 0x%08X\n", (uint32_t)rdev->doorbell.base);
+	DRM_INFO("doorbell mmio base: 0x%016llX\n", (uint64_t)rdev->doorbell.base);
 	DRM_INFO("doorbell mmio size: %u\n", (unsigned)rdev->doorbell.size);
 
 	rdev->doorbell.num_pages = rdev->doorbell.size / PAGE_SIZE;
@@ -1271,7 +1271,7 @@ int radeon_device_init(struct radeon_dev
 	if (rdev->rmmio == NULL) {
 		return -ENOMEM;
 	}
-	DRM_INFO("register mmio base: 0x%08X\n", (uint32_t)rdev->rmmio_base);
+	DRM_INFO("register mmio base: 0x%016llX\n", (uint64_t)rdev->rmmio_base);
 	DRM_INFO("register mmio size: %u\n", (unsigned)rdev->rmmio_size);
 
 	/* doorbell bar mapping */

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Allow > 32-bit physical addresses for TTM bus placement.
--- linux-ppc-3.12/include/drm/ttm/ttm_bo_api.h	2014-08-05 13:47:31.082598913 +0200
+++ linux-ppc-3.12/include/drm/ttm/ttm_bo_api.h	2014-08-05 14:14:54.999755480 +0200
@@ -82,7 +82,7 @@ struct ttm_placement {
  */
 struct ttm_bus_placement {
 	void		*addr;
-	unsigned long	base;
+	resource_size_t	base;
 	unsigned long	size;
 	unsigned long	offset;
 	bool		is_iomem;

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