From patchwork Wed Nov 23 02:57:21 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 13052953 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 8E032C43217 for ; Wed, 23 Nov 2022 03:01:02 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2E2E110E4CE; Wed, 23 Nov 2022 03:00:51 +0000 (UTC) Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by gabe.freedesktop.org (Postfix) with ESMTPS id 68C5310E1E4 for ; Wed, 23 Nov 2022 03:00:31 +0000 (UTC) Received: from dimapc.. (109-252-117-140.nat.spd-mgts.ru [109.252.117.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: dmitry.osipenko) by madras.collabora.co.uk (Postfix) with ESMTPSA id 7DA756602AE6; Wed, 23 Nov 2022 03:00:28 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1669172430; bh=7KjneL+L43Td+Zu5d4wJCYl000K2YCO+sqyPKgW4Sm8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kt7sUC/blNUKne8qsrtLLzhvPC64Ar1ZFXFx2UAhR9P1wPsv3JjG4byL2JrNi/JJn tbXpxL5lmSYnf7qd/7UC5yUcQ4xJuB5xLwIJhU7JjW1aFEyFgWNIIx7djkD1zhj0KO vfcmAAGjRII4V0Knq9nH3sXBzB9+aK+Y5xDCKll7XQT3JwAj2sdOCXBO5Xg2T750Db pbODOplneHuL2UDnG2rx35DyS6ABIh/POMmAEGZ+khx9E0+QKxIyUuANSKcIgXu2DV SBrvnqkGn0X4Dw3NBW4VCxzREhV1LF1sNbc6g86fMXm6HDALMmlu70yoeyysDcL5aB 5/IszkYSimCLw== From: Dmitry Osipenko To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , Daniel Almeida , Gustavo Padovan , Daniel Stone , Tomeu Vizoso , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Clark , Sumit Semwal , =?utf-8?q?Christian_K=C3=B6nig?= , Qiang Yu , Steven Price , Alyssa Rosenzweig , Rob Herring , Sean Paul , Dmitry Baryshkov , Abhinav Kumar Subject: [PATCH v9 09/11] drm/gem: Add drm_gem_pin_unlocked() Date: Wed, 23 Nov 2022 05:57:21 +0300 Message-Id: <20221123025723.695075-10-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221123025723.695075-1-dmitry.osipenko@collabora.com> References: <20221123025723.695075-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add unlocked variants of drm_gem_un/pin() functions. These new helpers will take care of GEM dma-reservation locking for DRM drivers. VirtIO-GPU driver will use these helpers to pin shmem framebuffers, preventing them from eviction during scanout. Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/drm_gem.c | 29 +++++++++++++++++++++++++++++ include/drm/drm_gem.h | 3 +++ 2 files changed, 32 insertions(+) diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c index c0510b8080d2..0ac5f69ee292 100644 --- a/drivers/gpu/drm/drm_gem.c +++ b/drivers/gpu/drm/drm_gem.c @@ -1154,6 +1154,35 @@ void drm_gem_unpin(struct drm_gem_object *obj) obj->funcs->unpin(obj); } +int drm_gem_pin_unlocked(struct drm_gem_object *obj) +{ + int ret; + + if (!obj->funcs->pin) + return 0; + + ret = dma_resv_lock_interruptible(obj->resv, NULL); + if (ret) + return ret; + + ret = obj->funcs->pin(obj); + dma_resv_unlock(obj->resv); + + return ret; +} +EXPORT_SYMBOL(drm_gem_pin_unlocked); + +void drm_gem_unpin_unlocked(struct drm_gem_object *obj) +{ + if (!obj->funcs->unpin) + return; + + dma_resv_lock(obj->resv, NULL); + obj->funcs->unpin(obj); + dma_resv_unlock(obj->resv); +} +EXPORT_SYMBOL(drm_gem_unpin_unlocked); + int drm_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map) { int ret; diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h index add1371453f0..8a3a07eae8fa 100644 --- a/include/drm/drm_gem.h +++ b/include/drm/drm_gem.h @@ -492,4 +492,7 @@ unsigned long drm_gem_lru_scan(struct drm_gem_lru *lru, bool drm_gem_object_evict(struct drm_gem_object *obj); +int drm_gem_pin_unlocked(struct drm_gem_object *obj); +void drm_gem_unpin_unlocked(struct drm_gem_object *obj); + #endif /* __DRM_GEM_H__ */