drm/radeon/cayman: add VM CS checker support for CP DMA
Need to verify for copies involving registers.
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 5435879..62c2271 100644
--- a/drivers/gpu/drm/radeon/evergreen_cs.c
+++ b/drivers/gpu/drm/radeon/evergreen_cs.c
@@ -2932,6 +2932,7 @@
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 @@
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;
}