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>

1 files changed, 47 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/evergreen_cs.c b/drivers/gpu/drm/radeon/evergreen_cs.c
index 5435879ad535..62c227104781 100644
--- a/drivers/gpu/drm/radeon/evergreen_cs.c
+++ b/drivers/gpu/drm/radeon/evergreen_cs.c
@@ -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;
         }