From patchwork Fri May 8 08:16:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 11535913 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4B3FB15E6 for ; Fri, 8 May 2020 08:17:11 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 33EFC206D5 for ; Fri, 8 May 2020 08:17:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 33EFC206D5 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=chris-wilson.co.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 45FE56E2D6; Fri, 8 May 2020 08:17:08 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from fireflyinternet.com (mail.fireflyinternet.com [109.228.58.192]) by gabe.freedesktop.org (Postfix) with ESMTPS id CC3656E2D6 for ; Fri, 8 May 2020 08:17:04 +0000 (UTC) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.65.138; Received: from build.alporthouse.com (unverified [78.156.65.138]) by fireflyinternet.com (Firefly Internet (M1)) with ESMTP id 21147516-1500050 for multiple; Fri, 08 May 2020 09:16:35 +0100 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Fri, 8 May 2020 09:16:27 +0100 Message-Id: <20200508081630.13882-8-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200508081630.13882-1-chris@chris-wilson.co.uk> References: <20200508081630.13882-1-chris@chris-wilson.co.uk> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 08/11] drm/i915/gem: Allow combining submit-fences with syncobj X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Chris Wilson Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" We allow exported sync_file fences to be used as submit fences, but they are not the only source of user fences. We also accept an array of syncobj, and as with sync_file these are dma_fences underneath and so feature the same set of controls. The submit-fence allows for a request to be scheduled at the same time as the signaler, rather than as normal after. Userspace can combine submit-fence with its own semaphores for intra-batch scheduling. Not exposing submit-fences to syncobj was at the time just a matter of pragmatic expediency. Fixes: a88b6e4cbafd ("drm/i915: Allow specification of parallel execbuf") Link: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4854 Signed-off-by: Chris Wilson Cc: Tvrtko Ursulin Cc: Lionel Landwerlin Reviewed-by: Tvrtko Ursulin --- .../gpu/drm/i915/gem/i915_gem_execbuffer.c | 14 +++++++---- drivers/gpu/drm/i915/i915_request.c | 24 +++++++++++++++++++ include/uapi/drm/i915_drm.h | 7 +++--- 3 files changed, 37 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c index 199131db200f..6368f0070157 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c @@ -2432,7 +2432,7 @@ static void __free_fence_array(struct drm_syncobj **fences, unsigned int n) { while (n--) - drm_syncobj_put(ptr_mask_bits(fences[n], 2)); + drm_syncobj_put(ptr_mask_bits(fences[n], 3)); kvfree(fences); } @@ -2489,7 +2489,7 @@ get_fence_array(struct drm_i915_gem_execbuffer2 *args, BUILD_BUG_ON(~(ARCH_KMALLOC_MINALIGN - 1) & ~__I915_EXEC_FENCE_UNKNOWN_FLAGS); - fences[n] = ptr_pack_bits(syncobj, fence.flags, 2); + fences[n] = ptr_pack_bits(syncobj, fence.flags, 3); } return fences; @@ -2520,7 +2520,7 @@ await_fence_array(struct i915_execbuffer *eb, struct dma_fence *fence; unsigned int flags; - syncobj = ptr_unpack_bits(fences[n], &flags, 2); + syncobj = ptr_unpack_bits(fences[n], &flags, 3); if (!(flags & I915_EXEC_FENCE_WAIT)) continue; @@ -2544,7 +2544,11 @@ await_fence_array(struct i915_execbuffer *eb, spin_unlock(&syncobj->lock); } - err = i915_request_await_dma_fence(eb->request, fence); + if (flags & I915_EXEC_FENCE_WAIT_SUBMIT) + err = i915_request_await_execution(eb->request, fence, + eb->engine->bond_execute); + else + err = i915_request_await_dma_fence(eb->request, fence); dma_fence_put(fence); if (err < 0) return err; @@ -2565,7 +2569,7 @@ signal_fence_array(struct i915_execbuffer *eb, struct drm_syncobj *syncobj; unsigned int flags; - syncobj = ptr_unpack_bits(fences[n], &flags, 2); + syncobj = ptr_unpack_bits(fences[n], &flags, 3); if (!(flags & I915_EXEC_FENCE_SIGNAL)) continue; diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c index 4f1d8cc2d5af..6afd77e6f141 100644 --- a/drivers/gpu/drm/i915/i915_request.c +++ b/drivers/gpu/drm/i915/i915_request.c @@ -1382,6 +1382,26 @@ __i915_request_await_execution(struct i915_request *to, &from->fence); } +static int execution_proxy(struct await_proxy *ap) +{ + return i915_request_await_execution(ap->request, ap->fence, ap->data); +} + +static int +i915_request_await_proxy_execution(struct i915_request *rq, + struct dma_fence *fence, + void (*hook)(struct i915_request *rq, + struct dma_fence *signal)) +{ + /* + * We have to wait until the real request is known in order to + * be able to hook into its execution, as opposed to waiting for + * its completion. + */ + return __i915_request_await_proxy(rq, fence, I915_FENCE_TIMEOUT, + execution_proxy, hook); +} + int i915_request_await_execution(struct i915_request *rq, struct dma_fence *fence, @@ -1421,6 +1441,10 @@ i915_request_await_execution(struct i915_request *rq, ret = __i915_request_await_execution(rq, to_request(fence), hook); + else if (dma_fence_is_proxy(fence)) + ret = i915_request_await_proxy_execution(rq, + fence, + hook); else ret = i915_request_await_external(rq, fence); if (ret < 0) diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h index 14b67cd6b54b..704dd0e3bc1d 100644 --- a/include/uapi/drm/i915_drm.h +++ b/include/uapi/drm/i915_drm.h @@ -1040,9 +1040,10 @@ struct drm_i915_gem_exec_fence { */ __u32 handle; -#define I915_EXEC_FENCE_WAIT (1<<0) -#define I915_EXEC_FENCE_SIGNAL (1<<1) -#define __I915_EXEC_FENCE_UNKNOWN_FLAGS (-(I915_EXEC_FENCE_SIGNAL << 1)) +#define I915_EXEC_FENCE_WAIT (1u << 0) +#define I915_EXEC_FENCE_SIGNAL (1u << 1) +#define I915_EXEC_FENCE_WAIT_SUBMIT (1u << 2) +#define __I915_EXEC_FENCE_UNKNOWN_FLAGS (-(I915_EXEC_FENCE_WAIT_SUBMIT << 1)) __u32 flags; };