From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751827AbcFWPae (ORCPT ); Thu, 23 Jun 2016 11:30:34 -0400 Received: from mail-yw0-f193.google.com ([209.85.161.193]:33309 "EHLO mail-yw0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751764AbcFWPa3 (ORCPT ); Thu, 23 Jun 2016 11:30:29 -0400 From: Gustavo Padovan To: dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org, Daniel Stone , Daniel Vetter , Rob Clark , Greg Hackmann , John Harrison , laurent.pinchart@ideasonboard.com, seanpaul@google.com, marcheu@google.com, m.chehab@samsung.com, Sumit Semwal , Maarten Lankhorst , Gustavo Padovan Subject: [RFC 3/5] dma-buf/fence: add .get_fences() ops Date: Thu, 23 Jun 2016 12:29:48 -0300 Message-Id: <1466695790-2833-4-git-send-email-gustavo@padovan.org> X-Mailer: git-send-email 2.5.5 In-Reply-To: <1466695790-2833-1-git-send-email-gustavo@padovan.org> References: <1466695790-2833-1-git-send-email-gustavo@padovan.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Gustavo Padovan get_fences() should return a copy of all fences in the fence as some fence subclass (such as fence_array) can store more than one fence at time. Signed-off-by: Gustavo Padovan --- drivers/dma-buf/fence.c | 14 ++++++++++++++ include/linux/fence.h | 3 +++ 2 files changed, 17 insertions(+) diff --git a/drivers/dma-buf/fence.c b/drivers/dma-buf/fence.c index 4e61afb..f4094fd 100644 --- a/drivers/dma-buf/fence.c +++ b/drivers/dma-buf/fence.c @@ -185,6 +185,20 @@ void fence_release(struct kref *kref) } EXPORT_SYMBOL(fence_release); +struct fence **fence_get_fences(struct fence *fence) +{ + if (fence->ops->get_fences) { + return fence->ops->get_fences(fence); + } else { + struct fence **fences = kmalloc(sizeof(**fences), GFP_KERNEL); + if (!fences) + return NULL; + fences[0] = fence; + return fences; + } +} +EXPORT_SYMBOL(fence_get_fences); + void fence_teardown(struct fence *fence) { if (fence->ops->teardown) diff --git a/include/linux/fence.h b/include/linux/fence.h index 1d3b671..a7a2fbc 100644 --- a/include/linux/fence.h +++ b/include/linux/fence.h @@ -111,6 +111,7 @@ struct fence_cb { * struct fence_ops - operations implemented for fence * @get_driver_name: returns the driver name. * @get_timeline_name: return the name of the context this fence belongs to. + * @get_fences: return an array with a copy of all fences in the fence. * @enable_signaling: enable software signaling of fence. * @signaled: [optional] peek whether the fence is signaled, can be null. * @wait: custom wait implementation, or fence_default_wait. @@ -175,6 +176,7 @@ struct fence_cb { struct fence_ops { const char * (*get_driver_name)(struct fence *fence); const char * (*get_timeline_name)(struct fence *fence); + struct fence ** (*get_fences)(struct fence *fence); bool (*enable_signaling)(struct fence *fence); bool (*signaled)(struct fence *fence); signed long (*wait)(struct fence *fence, bool intr, signed long timeout); @@ -189,6 +191,7 @@ struct fence_ops { void fence_init(struct fence *fence, const struct fence_ops *ops, spinlock_t *lock, u64 context, unsigned seqno); +struct fence **fence_get_fences(struct fence *fence); void fence_release(struct kref *kref); void fence_teardown(struct fence *fence); void fence_free(struct fence *fence); -- 2.5.5