drm/radeon/kms: allocate vram scratch page on 6xx+
The vram scratch was originally only used on some 7xx asics
to work around a hw bug. Allocate the scratch page on all 6xx+
radeons and set the MC_VM_SYSTEM_APERTURE_DEFAULT_ADDR to point
to it. We shouldn't ever hit it since we limit the system
aperture to vram or vram and AGP, but better safe than sorry.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 00f6dc4..83b76db 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1144,10 +1144,11 @@
int radeon_gem_get_tiling_ioctl(struct drm_device *dev, void *data,
struct drm_file *filp);
-/* VRAM scratch page for HDP bug */
-struct r700_vram_scratch {
+/* VRAM scratch page for HDP bug, default vram page */
+struct r600_vram_scratch {
struct radeon_bo *robj;
volatile uint32_t *ptr;
+ u64 gpu_addr;
};
/*
@@ -1219,7 +1220,7 @@
const struct firmware *rlc_fw; /* r6/700 RLC firmware */
const struct firmware *mc_fw; /* NI MC firmware */
struct r600_blit r600_blit;
- struct r700_vram_scratch vram_scratch;
+ struct r600_vram_scratch vram_scratch;
int msi_enabled; /* msi enabled */
struct r600_ih ih; /* r6/700 interrupt ring */
struct work_struct hotplug_work;
@@ -1468,6 +1469,12 @@
extern void radeon_ttm_set_active_vram_size(struct radeon_device *rdev, u64 size);
/*
+ * R600 vram scratch functions
+ */
+int r600_vram_scratch_init(struct radeon_device *rdev);
+void r600_vram_scratch_fini(struct radeon_device *rdev);
+
+/*
* r600 functions used by radeon_encoder.c
*/
extern void r600_hdmi_enable(struct drm_encoder *encoder);