diff options
| -rw-r--r-- | drivers/gpu/drm/xe/xe_hw_engine_group.c | 75 | ||||
| -rw-r--r-- | drivers/gpu/drm/xe/xe_hw_engine_group.h | 5 |
2 files changed, 80 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_hw_engine_group.c b/drivers/gpu/drm/xe/xe_hw_engine_group.c index 8d3ddfc4ee82b..e6c2351193516 100644 --- a/drivers/gpu/drm/xe/xe_hw_engine_group.c +++ b/drivers/gpu/drm/xe/xe_hw_engine_group.c @@ -235,3 +235,78 @@ static int xe_hw_engine_group_wait_for_dma_fence_jobs(struct xe_hw_engine_group return 0; } + +static int switch_mode(struct xe_hw_engine_group *group) +{ + int err = 0; + enum xe_hw_engine_group_execution_mode new_mode; + + lockdep_assert_held_write(&group->mode_sem); + + switch (group->cur_mode) { + case EXEC_MODE_LR: + new_mode = EXEC_MODE_DMA_FENCE; + err = xe_hw_engine_group_suspend_faulting_lr_jobs(group); + break; + case EXEC_MODE_DMA_FENCE: + new_mode = EXEC_MODE_LR; + err = xe_hw_engine_group_wait_for_dma_fence_jobs(group); + break; + } + + if (err) + return err; + + group->cur_mode = new_mode; + + return 0; +} + +/** + * xe_hw_engine_group_get_mode() - Get the group to execute in the new mode + * @group: The hw engine group + * @new_mode: The new execution mode + * @previous_mode: Pointer to the previous mode provided for use by caller + * + * Return: 0 if successful, -EINTR if locking failed. + */ +int xe_hw_engine_group_get_mode(struct xe_hw_engine_group *group, + enum xe_hw_engine_group_execution_mode new_mode, + enum xe_hw_engine_group_execution_mode *previous_mode) +__acquires(&group->mode_sem) +{ + int err = down_read_interruptible(&group->mode_sem); + + if (err) + return err; + + *previous_mode = group->cur_mode; + + if (new_mode != group->cur_mode) { + up_read(&group->mode_sem); + err = down_write_killable(&group->mode_sem); + if (err) + return err; + + if (new_mode != group->cur_mode) { + err = switch_mode(group); + if (err) { + up_write(&group->mode_sem); + return err; + } + } + downgrade_write(&group->mode_sem); + } + + return err; +} + +/** + * xe_hw_engine_group_put() - Put the group + * @group: The hw engine group + */ +void xe_hw_engine_group_put(struct xe_hw_engine_group *group) +__releases(&group->mode_sem) +{ + up_read(&group->mode_sem); +} diff --git a/drivers/gpu/drm/xe/xe_hw_engine_group.h b/drivers/gpu/drm/xe/xe_hw_engine_group.h index 857a837875041..e0deb7c7bb5b0 100644 --- a/drivers/gpu/drm/xe/xe_hw_engine_group.h +++ b/drivers/gpu/drm/xe/xe_hw_engine_group.h @@ -17,4 +17,9 @@ int xe_hw_engine_setup_groups(struct xe_gt *gt); int xe_hw_engine_group_add_exec_queue(struct xe_hw_engine_group *group, struct xe_exec_queue *q); void xe_hw_engine_group_del_exec_queue(struct xe_hw_engine_group *group, struct xe_exec_queue *q); +int xe_hw_engine_group_get_mode(struct xe_hw_engine_group *group, + enum xe_hw_engine_group_execution_mode new_mode, + enum xe_hw_engine_group_execution_mode *previous_mode); +void xe_hw_engine_group_put(struct xe_hw_engine_group *group); + #endif |