From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 399F6C3DA40 for ; Thu, 16 May 2024 18:24:11 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id AFBEC10EDA1; Thu, 16 May 2024 18:24:10 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="GAeVtxvq"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.13]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2010210ECC4 for ; Thu, 16 May 2024 18:24:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1715883844; x=1747419844; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=jEPJEKosN1yjd5TQOHa0fgfJPL/JOAPmiIyC606lXbY=; b=GAeVtxvqTBf8xXNUA30Y/NUtrP5uE63E94Ccas9B+8HJD3Dzvkkedohn hdGWdCS2hFd6eha+2vKVr5sog5GrkehjrSB21ZPPch4KRSR9GVDEG/CNj Nmpv/jdKh3CnoDAaeEIR4pGez63frUjWQ1u7/qBTigKl6XzafKD6muths 2+DOmJcRx/54HJkAgzjpSI5LMpIWvKYuDJXjF0lktlenFW8YnNPUE6zpb tQGNLBfh7MpOCOYI39VIfOh6gVYC7FlmSxAMValCG6jVitVpjRzQGSLki Yw/c2ZxMPVQUlHyxcv19KojfmjmDRzDxS6UP0C+ynJKW7JG0pymgUdtUT Q==; X-CSE-ConnectionGUID: FMITsKqmSFKBJL0RaWBY2g== X-CSE-MsgGUID: BgaGwtXmQDSa1FIR3kej4Q== X-IronPort-AV: E=McAfee;i="6600,9927,11074"; a="23159941" X-IronPort-AV: E=Sophos;i="6.08,165,1712646000"; d="scan'208";a="23159941" Received: from orviesa008.jf.intel.com ([10.64.159.148]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 May 2024 11:24:04 -0700 X-CSE-ConnectionGUID: 7WGbqBXMTom3RyyKEm7hXA== X-CSE-MsgGUID: s9u/0i0uRnCKGGpCR4t3kg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,165,1712646000"; d="scan'208";a="32065443" Received: from unknown (HELO fedora..) ([10.245.246.241]) by orviesa008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 May 2024 11:24:03 -0700 From: =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= To: intel-xe@lists.freedesktop.org Subject: [CI v3 14/21] drm/exec: drm_exec_trylock() Date: Thu, 16 May 2024 20:23:32 +0200 Message-ID: <20240516182339.3482-15-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 | 1 + 2 files changed, 39 insertions(+) diff --git a/drivers/gpu/drm/drm_exec.c b/drivers/gpu/drm/drm_exec.c index 2a28cbccaec7..1a62ee24c1b8 100644 --- a/drivers/gpu/drm/drm_exec.c +++ b/drivers/gpu/drm/drm_exec.c @@ -207,6 +207,44 @@ int drm_exec_handle_contended(struct drm_exec *exec) } EXPORT_SYMBOL(drm_exec_handle_contended); +/** + * drm_exec_trylock_obj - trylock a GEM object for use + * @exec: the drm_exec object with the state + * @obj: the GEM object to lock + * + * Lock a GEM object for use and grab a reference to it. + * + * Returns: -EALREADY when object is already locked (can be suppressed by + * setting the DRM_EXEC_IGNORE_DUPLICATES flag), -ENOMEM when memory + * allocation failed and zero for success. + */ +int drm_exec_trylock_obj(struct drm_exec *exec, struct drm_gem_object *obj) +{ + int ret; + + might_alloc(GFP_KERNEL); + + if (exec->prelocked == obj) { + drm_gem_object_put(exec->prelocked); + exec->prelocked = NULL; + return 0; + } + + if (!dma_resv_trylock_ctx(obj->resv, &exec->ticket)) { + if (dma_resv_locking_ctx(obj->resv) == &exec->ticket) + return (exec->flags & DRM_EXEC_IGNORE_DUPLICATES) ? 0 : -EALREADY; + else + return -EBUSY; + } + + ret = drm_exec_obj_locked(exec, obj); + if (ret) + dma_resv_unlock(obj->resv); + + return ret; +} +EXPORT_SYMBOL(drm_exec_trylock_obj); + /** * drm_exec_lock_obj - lock a GEM object for use * @exec: the drm_exec object with the state diff --git a/include/drm/drm_exec.h b/include/drm/drm_exec.h index a3490794ef35..a37c851a178b 100644 --- a/include/drm/drm_exec.h +++ b/include/drm/drm_exec.h @@ -148,6 +148,7 @@ void drm_exec_init(struct drm_exec *exec, u32 flags, unsigned nr); void drm_exec_fini(struct drm_exec *exec); bool drm_exec_cleanup(struct drm_exec *exec); int drm_exec_lock_obj(struct drm_exec *exec, struct drm_gem_object *obj); +int drm_exec_trylock_obj(struct drm_exec *exec, struct drm_gem_object *obj); void drm_exec_unlock_obj(struct drm_exec *exec, struct drm_gem_object *obj); int drm_exec_prepare_obj(struct drm_exec *exec, struct drm_gem_object *obj, unsigned int num_fences); -- 2.44.0