diff options
| -rw-r--r-- | drivers/gpu/drm/panthor/panthor_drv.c | 23 | ||||
| -rw-r--r-- | drivers/gpu/drm/panthor/panthor_sched.c | 2 | ||||
| -rw-r--r-- | include/uapi/drm/panthor_drm.h | 6 |
3 files changed, 29 insertions, 2 deletions
diff --git a/drivers/gpu/drm/panthor/panthor_drv.c b/drivers/gpu/drm/panthor/panthor_drv.c index b5e7b919f241..34182f67136c 100644 --- a/drivers/gpu/drm/panthor/panthor_drv.c +++ b/drivers/gpu/drm/panthor/panthor_drv.c @@ -10,6 +10,7 @@ #include <linux/platform_device.h> #include <linux/pm_runtime.h> +#include <drm/drm_auth.h> #include <drm/drm_debugfs.h> #include <drm/drm_drv.h> #include <drm/drm_exec.h> @@ -996,6 +997,24 @@ static int panthor_ioctl_group_destroy(struct drm_device *ddev, void *data, return panthor_group_destroy(pfile, args->group_handle); } +static int group_priority_permit(struct drm_file *file, + u8 priority) +{ + /* Ensure that priority is valid */ + if (priority > PANTHOR_GROUP_PRIORITY_HIGH) + return -EINVAL; + + /* Medium priority and below are always allowed */ + if (priority <= PANTHOR_GROUP_PRIORITY_MEDIUM) + return 0; + + /* Higher priorities require CAP_SYS_NICE or DRM_MASTER */ + if (capable(CAP_SYS_NICE) || drm_is_current_master(file)) + return 0; + + return -EACCES; +} + static int panthor_ioctl_group_create(struct drm_device *ddev, void *data, struct drm_file *file) { @@ -1011,6 +1030,10 @@ static int panthor_ioctl_group_create(struct drm_device *ddev, void *data, if (ret) return ret; + ret = group_priority_permit(file, args->priority); + if (ret) + return ret; + ret = panthor_group_create(pfile, args, queue_args); if (ret >= 0) { args->group_handle = ret; diff --git a/drivers/gpu/drm/panthor/panthor_sched.c b/drivers/gpu/drm/panthor/panthor_sched.c index 463bcd3cf00f..12b272a912f8 100644 --- a/drivers/gpu/drm/panthor/panthor_sched.c +++ b/drivers/gpu/drm/panthor/panthor_sched.c @@ -3092,7 +3092,7 @@ int panthor_group_create(struct panthor_file *pfile, if (group_args->pad) return -EINVAL; - if (group_args->priority > PANTHOR_CSG_PRIORITY_HIGH) + if (group_args->priority >= PANTHOR_CSG_PRIORITY_COUNT) return -EINVAL; if ((group_args->compute_core_mask & ~ptdev->gpu_info.shader_present) || diff --git a/include/uapi/drm/panthor_drm.h b/include/uapi/drm/panthor_drm.h index 926b1deb1116..e23a7f9b0eac 100644 --- a/include/uapi/drm/panthor_drm.h +++ b/include/uapi/drm/panthor_drm.h @@ -692,7 +692,11 @@ enum drm_panthor_group_priority { /** @PANTHOR_GROUP_PRIORITY_MEDIUM: Medium priority group. */ PANTHOR_GROUP_PRIORITY_MEDIUM, - /** @PANTHOR_GROUP_PRIORITY_HIGH: High priority group. */ + /** + * @PANTHOR_GROUP_PRIORITY_HIGH: High priority group. + * + * Requires CAP_SYS_NICE or DRM_MASTER. + */ PANTHOR_GROUP_PRIORITY_HIGH, }; |