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Commit 84ef4c12 authored by Dave Airlie's avatar Dave Airlie Committed by Alex Deucher
Browse files

drm/radeon: add cayman VM support for append packet. 



This adds support for SET_APPEND_CNT packet3 to the VM paths.

Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent adcec288

drivers/gpu/drm/radeon/evergreen_cs.c

+21 −0
Original line number Diff line number Diff line
@@ -3483,6 +3483,27 @@ static int evergreen_vm_packet3_check(struct radeon_device *rdev, 
			}

		}

		break;

	case PACKET3_SET_APPEND_CNT: {

		uint32_t areg;

		uint32_t allowed_reg_base;



		if (pkt->count != 2) {

			DRM_ERROR("bad SET_APPEND_CNT (invalid count)\n");

			return -EINVAL;

		}



		allowed_reg_base = GDS_APPEND_COUNT_0;

		allowed_reg_base -= PACKET3_SET_CONTEXT_REG_START;

		allowed_reg_base >>= 2;



		areg = idx_value >> 16;

		if (areg < allowed_reg_base || areg > (allowed_reg_base + 11)) {

			DRM_ERROR("forbidden register for append cnt 0x%08x at %d\n",

				  areg, idx);

			return -EINVAL;

		}

		break;

	}

	default:

		return -EINVAL;

	}