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Commit ffb57c4b authored by Jay Estabrook's avatar Jay Estabrook Committed by Dave Airlie
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drm/radeon/alpha: Add Alpha support to Radeon DRM code 



Alpha needs to have available the system bus address for the Radeon's
local memory, so that it can be used in ttm_bo_vm_fault(), when building
the PTEs for accessing that VRAM.  So, we make bus.addr hold the ioremap()
return, and then we can modify bus.base appropriately for use during page
fault processing.

Signed-off-by: default avatarJay Estabrook <jay.estabrook@gmail.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 3210d190

drivers/gpu/drm/radeon/radeon_ttm.c

+23 −0
Original line number Diff line number Diff line
@@ -450,6 +450,29 @@ static int radeon_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_ 
			return -EINVAL;

		mem->bus.base = rdev->mc.aper_base;

		mem->bus.is_iomem = true;

#ifdef __alpha__

		/*

		 * Alpha: use bus.addr to hold the ioremap() return,

		 * so we can modify bus.base below.

		 */

		if (mem->placement & TTM_PL_FLAG_WC)

			mem->bus.addr =

				ioremap_wc(mem->bus.base + mem->bus.offset,

					   mem->bus.size);

		else

			mem->bus.addr =

				ioremap_nocache(mem->bus.base + mem->bus.offset,

						mem->bus.size);



		/*

		 * Alpha: Use just the bus offset plus

		 * the hose/domain memory base for bus.base.

		 * It then can be used to build PTEs for VRAM

		 * access, as done in ttm_bo_vm_fault().

		 */

		mem->bus.base = (mem->bus.base & 0x0ffffffffUL) +

			rdev->ddev->hose->dense_mem_base;

#endif

		break;

	default:

		return -EINVAL;