drm/radeon: add support for MEM_WRITE packet
To make it easier to debug some lockup from userspace add support
to MEM_WRITE packet.
Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/evergreen_cs.c b/drivers/gpu/drm/radeon/evergreen_cs.c
index 74c6b42..5cea852 100644
--- a/drivers/gpu/drm/radeon/evergreen_cs.c
+++ b/drivers/gpu/drm/radeon/evergreen_cs.c
@@ -2654,6 +2654,35 @@
ib[idx+4] = upper_32_bits(offset) & 0xff;
}
break;
+ case PACKET3_MEM_WRITE:
+ {
+ u64 offset;
+
+ if (pkt->count != 3) {
+ DRM_ERROR("bad MEM_WRITE (invalid count)\n");
+ return -EINVAL;
+ }
+ r = evergreen_cs_packet_next_reloc(p, &reloc);
+ if (r) {
+ DRM_ERROR("bad MEM_WRITE (missing reloc)\n");
+ return -EINVAL;
+ }
+ offset = radeon_get_ib_value(p, idx+0);
+ offset += ((u64)(radeon_get_ib_value(p, idx+1) & 0xff)) << 32UL;
+ if (offset & 0x7) {
+ DRM_ERROR("bad MEM_WRITE (address not qwords aligned)\n");
+ return -EINVAL;
+ }
+ if ((offset + 8) > radeon_bo_size(reloc->robj)) {
+ DRM_ERROR("bad MEM_WRITE bo too small: 0x%llx, 0x%lx\n",
+ offset + 8, radeon_bo_size(reloc->robj));
+ return -EINVAL;
+ }
+ offset += reloc->lobj.gpu_offset;
+ ib[idx+0] = offset;
+ ib[idx+1] = upper_32_bits(offset) & 0xff;
+ break;
+ }
case PACKET3_COPY_DW:
if (pkt->count != 4) {
DRM_ERROR("bad COPY_DW (invalid count)\n");