From nobody Thu Apr 9 13:43:15 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F3F6DC43217 for ; Sat, 5 Nov 2022 23:29:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230123AbiKEX3o (ORCPT ); Sat, 5 Nov 2022 19:29:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59566 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230135AbiKEX3S (ORCPT ); Sat, 5 Nov 2022 19:29:18 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A306310B6A for ; Sat, 5 Nov 2022 16:29:13 -0700 (PDT) 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 7D46E6602966; Sat, 5 Nov 2022 23:29:10 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1667690952; bh=vbVBlvxc2Xe9eEsRj4GTle+nnT3PFJq80uOvrVBOKHM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lxg4owk8Wj8lCKX2iriLQJDmAXo6LCYQcVBH2wKNWh7xXy7u1+RPH8xrq1uT1hia0 C7Eo8mZfOrJNQawIVCGlxNCW3Bzbc4UKj8FiedWRsjvYUgR2RDzUf9dP/AC03M/pnz G6qsTemVYuiUcBwYveJlTr0/Ori5tJJZe7X7TC2xLol7culnPwjvDR4YXhst5oTYyx xocbL70C6rcz5FY1KYMjyf49DwNZttv5hCxcXN/whKJThsCv2KB4uuGfWR3VpJfb48 X1Sc7jM+E14K6ERFsRPdKQ2AAwCLLbQbMmTHbT3YxwdV8ONr0AnWllk2NY0kKEyIM0 pbejPAnhrtWAA== 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=20K=C3=B6nig?= , Qiang Yu , Steven Price , Alyssa Rosenzweig , Rob Herring , Sean Paul , Dmitry Baryshkov , Abhinav Kumar Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Dmitry Osipenko , kernel@collabora.com, virtualization@lists.linux-foundation.org Subject: [PATCH v8 5/7] drm/gem: Add drm_gem_pin_unlocked() Date: Sun, 6 Nov 2022 02:27:17 +0300 Message-Id: <20221105232719.302619-6-dmitry.osipenko@collabora.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221105232719.302619-1-dmitry.osipenko@collabora.com> References: <20221105232719.302619-1-dmitry.osipenko@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" 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 299bca1390aa..5b8c66f113a9 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); } =20 +int drm_gem_pin_unlocked(struct drm_gem_object *obj) +{ + int ret; + + if (!obj->funcs->pin) + return 0; + + ret =3D dma_resv_lock_interruptible(obj->resv, NULL); + if (ret) + return ret; + + ret =3D 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 b46ade812443..b43da1652356 100644 --- a/include/drm/drm_gem.h +++ b/include/drm/drm_gem.h @@ -480,4 +480,7 @@ unsigned long drm_gem_lru_scan(struct drm_gem_lru *lru, unsigned long *remaining, bool (*shrink)(struct drm_gem_object *obj)); =20 +int drm_gem_pin_unlocked(struct drm_gem_object *obj); +void drm_gem_unpin_unlocked(struct drm_gem_object *obj); + #endif /* __DRM_GEM_H__ */ --=20 2.37.3