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([10.245.246.241]) by orviesa008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 May 2024 11:24:04 -0700 From: =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= To: intel-xe@lists.freedesktop.org Subject: [CI v3 15/21] drm/exec: Add a snapshot capability. Date: Thu, 16 May 2024 20:23:33 +0200 Message-ID: <20240516182339.3482-16-thomas.hellstrom@linux.intel.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240516182339.3482-1-thomas.hellstrom@linux.intel.com> References: <20240516182339.3482-1-thomas.hellstrom@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" Signed-off-by: Thomas Hellström --- drivers/gpu/drm/drm_exec.c | 38 +++++++++++++++++++++++++++++++++++++- include/drm/drm_exec.h | 11 ++++++++++- 2 files changed, 47 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/drm_exec.c b/drivers/gpu/drm/drm_exec.c index 1a62ee24c1b8..dec5300ef3a5 100644 --- a/drivers/gpu/drm/drm_exec.c +++ b/drivers/gpu/drm/drm_exec.c @@ -57,6 +57,7 @@ static void drm_exec_unlock_all(struct drm_exec *exec) struct drm_gem_object *obj; unsigned long index; + WARN_ON(exec->snap); drm_exec_for_each_locked_object_reverse(exec, index, obj) { dma_resv_unlock(obj->resv); drm_gem_object_put(obj); @@ -289,7 +290,6 @@ int drm_exec_lock_obj(struct drm_exec *exec, struct drm_gem_object *obj) goto error_unlock; return 0; - error_unlock: dma_resv_unlock(obj->resv); return ret; @@ -383,5 +383,41 @@ int drm_exec_prepare_array(struct drm_exec *exec, } EXPORT_SYMBOL(drm_exec_prepare_array); +void drm_exec_restore(struct drm_exec *exec, struct drm_exec_snapshot *snap) +{ + struct drm_gem_object *obj; + unsigned int index; + + exec->snap = snap->saved_snap; + + drm_exec_for_each_locked_object_reverse(exec, index, obj) { + if (index + 1 == snap->num_locked) + break; + + dma_resv_unlock(obj->resv); + drm_gem_object_put(obj); + exec->objects[index] = NULL; + } + + exec->num_objects = snap->num_locked; + + if (!exec->prelocked) + exec->prelocked = snap->prelocked; + else + drm_gem_object_put(snap->prelocked); +} +EXPORT_SYMBOL(drm_exec_restore); + +void drm_exec_snapshot(struct drm_exec *exec, struct drm_exec_snapshot *snap) +{ + snap->num_locked = exec->num_objects; + snap->prelocked = exec->prelocked; + if (snap->prelocked) + drm_gem_object_get(snap->prelocked); + snap->saved_snap = exec->snap; + exec->snap = snap; +} +EXPORT_SYMBOL(drm_exec_snapshot); + MODULE_DESCRIPTION("DRM execution context"); MODULE_LICENSE("Dual MIT/GPL"); diff --git a/include/drm/drm_exec.h b/include/drm/drm_exec.h index a37c851a178b..0ef326f2f5f0 100644 --- a/include/drm/drm_exec.h +++ b/include/drm/drm_exec.h @@ -19,7 +19,6 @@ struct drm_exec { * @flags: Flags to control locking behavior */ u32 flags; - /** * @ticket: WW ticket used for acquiring locks */ @@ -49,6 +48,13 @@ struct drm_exec { * @prelocked: already locked GEM object due to contention */ struct drm_gem_object *prelocked; + struct drm_exec_snapshot *snap; +}; + +struct drm_exec_snapshot { + struct drm_exec_snapshot *saved_snap; + struct drm_gem_object *prelocked; + unsigned long num_locked; }; int drm_exec_handle_contended(struct drm_exec *exec); @@ -156,5 +162,8 @@ int drm_exec_prepare_array(struct drm_exec *exec, struct drm_gem_object **objects, unsigned int num_objects, unsigned int num_fences); +void drm_exec_snapshot(struct drm_exec *exec, struct drm_exec_snapshot *snap); +void drm_exec_restore(struct drm_exec *exec, struct drm_exec_snapshot *snap); + #endif -- 2.44.0