drm/amdgpu: Add support for querying the max ibs in a submission. (v3)

[platform/kernel/linux-starfive.git] / drivers / gpu / drm / amd / amdgpu / amdgpu_kms.c

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index 0efb385..1a2e342 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -1140,6 +1140,15 @@ int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
                kfree(caps);
                return r;
        }
+       case AMDGPU_INFO_MAX_IBS: {
+               uint32_t max_ibs[AMDGPU_HW_IP_NUM];
+
+               for (i = 0; i < AMDGPU_HW_IP_NUM; ++i)
+                       max_ibs[i] = amdgpu_ring_max_ibs(i);
+
+               return copy_to_user(out, max_ibs,
+                                   min((size_t)size, sizeof(max_ibs))) ? -EFAULT : 0;
+       }
        default:
                DRM_DEBUG_KMS("Invalid request %d\n", info->query);
                return -EINVAL;