Commit 94e014ee authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/radeon/cayman: add VM CS checker support for CP DMA 



Need to verify for copies involving registers.

Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 8770b86b

drivers/gpu/drm/radeon/evergreen_cs.c

+47 −0
Original line number Diff line number Diff line
@@ -2932,6 +2932,7 @@ static int evergreen_vm_packet3_check(struct radeon_device *rdev, 
	u32 idx = pkt->idx + 1;

	u32 idx_value = ib[idx];

	u32 start_reg, end_reg, reg, i;

	u32 command, info;



	switch (pkt->opcode) {

	case PACKET3_NOP:
@@ -3006,6 +3007,52 @@ static int evergreen_vm_packet3_check(struct radeon_device *rdev, 
				return -EINVAL;

		}

		break;

	case PACKET3_CP_DMA:

		command = ib[idx + 4];

		info = ib[idx + 1];

		if (command & PACKET3_CP_DMA_CMD_SAS) {

			/* src address space is register */

			if (((info & 0x60000000) >> 29) == 0) {

				start_reg = idx_value << 2;

				if (command & PACKET3_CP_DMA_CMD_SAIC) {

					reg = start_reg;

					if (!evergreen_vm_reg_valid(reg)) {

						DRM_ERROR("CP DMA Bad SRC register\n");

						return -EINVAL;

					}

				} else {

					for (i = 0; i < (command & 0x1fffff); i++) {

						reg = start_reg + (4 * i);

						if (!evergreen_vm_reg_valid(reg)) {

							DRM_ERROR("CP DMA Bad SRC register\n");

							return -EINVAL;

						}

					}

				}

			}

		}

		if (command & PACKET3_CP_DMA_CMD_DAS) {

			/* dst address space is register */

			if (((info & 0x00300000) >> 20) == 0) {

				start_reg = ib[idx + 2];

				if (command & PACKET3_CP_DMA_CMD_DAIC) {

					reg = start_reg;

					if (!evergreen_vm_reg_valid(reg)) {

						DRM_ERROR("CP DMA Bad DST register\n");

						return -EINVAL;

					}

				} else {

					for (i = 0; i < (command & 0x1fffff); i++) {

						reg = start_reg + (4 * i);

						if (!evergreen_vm_reg_valid(reg)) {

							DRM_ERROR("CP DMA Bad DST register\n");

							return -EINVAL;

						}

					}

				}

			}

		}

		break;

	default:

		return -EINVAL;

	}