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t=1709033941; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ZV4CkeoE17AOm8bSqkPxWkJQ8aQ/V+vccV/TuSAVGrs=; b=+jgviNOO7hbJ5BGlv+ZA2LWA4AyIZMqac9Mb3L87ltFgdGkEWE/f9yRKoiWOOri4ITG6+i Q1W5kalkmzziP3Dg== Received: from imap2.dmz-prg2.suse.org (localhost [127.0.0.1]) (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) by imap2.dmz-prg2.suse.org (Postfix) with ESMTPS id 439FE13ABC; Tue, 27 Feb 2024 11:39:00 +0000 (UTC) Received: from dovecot-director2.suse.de ([10.150.64.162]) by imap2.dmz-prg2.suse.org with ESMTPSA id MFEpD9TJ3WVMUQAAn2gu4w (envelope-from ); Tue, 27 Feb 2024 11:39:00 +0000 From: Thomas Zimmermann To: daniel@ffwll.ch, airlied@gmail.com, mripard@kernel.org, maarten.lankhorst@linux.intel.com, christian.koenig@amd.com, sumit.semwal@linaro.org, dmitry.osipenko@collabora.com, robdclark@gmail.com, quic_abhinavk@quicinc.com, dmitry.baryshkov@linaro.org, sean@poorly.run, marijn.suijten@somainline.org, suijingfeng@loongson.cn, kherbst@redhat.com, lyude@redhat.com, dakr@redhat.com, airlied@redhat.com, kraxel@redhat.com, alexander.deucher@amd.com, Xinhui.Pan@amd.com, zack.rusin@broadcom.com, bcm-kernel-feedback-list@broadcom.com Cc: dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, nouveau@lists.freedesktop.org, virtualization@lists.linux.dev, spice-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, Thomas Zimmermann Subject: [PATCH 06/13] drm/nouveau: Acquire reservation lock in GEM pin/unpin callbacks Date: Tue, 27 Feb 2024 11:14:53 +0100 Message-ID: <20240227113853.8464-7-tzimmermann@suse.de> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240227113853.8464-1-tzimmermann@suse.de> References: <20240227113853.8464-1-tzimmermann@suse.de> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Level: * X-Spamd-Bar: + Authentication-Results: smtp-out2.suse.de; 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MIME_GOOD(-0.10)[text/plain]; NEURAL_HAM_LONG(-1.00)[-1.000]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; RCPT_COUNT_TWELVE(0.00)[30]; MID_CONTAINS_FROM(1.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:dkim,suse.de:email]; FUZZY_BLOCKED(0.00)[rspamd.com]; RCVD_TLS_ALL(0.00)[] X-Spam-Score: 1.40 X-Rspamd-Queue-Id: 10EFD1FB99 X-Spam-Flag: NO Acquire the reservation lock directly in GEM pin callback. Same for unpin. Prepares for further changes. Dma-buf locking semantics require callers to hold the buffer's reservation lock when invoking the pin and unpin callbacks. Prepare nouveau accordingly by pushing locking out of the implementation. A follow-up patch will fix locking for all GEM code at once. Signed-off-by: Thomas Zimmermann --- drivers/gpu/drm/nouveau/nouveau_prime.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_prime.c b/drivers/gpu/drm/nouveau/nouveau_prime.c index 1b2ff0c40fc1c..774f9bd031102 100644 --- a/drivers/gpu/drm/nouveau/nouveau_prime.c +++ b/drivers/gpu/drm/nouveau/nouveau_prime.c @@ -86,21 +86,32 @@ struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev, int nouveau_gem_prime_pin(struct drm_gem_object *obj) { struct nouveau_bo *nvbo = nouveau_gem_object(obj); + struct ttm_buffer_object *bo = &nvbo->bo; int ret; - /* pin buffer into GTT */ - ret = nouveau_bo_pin(nvbo, NOUVEAU_GEM_DOMAIN_GART, false); + ret = ttm_bo_reserve(bo, false, false, NULL); if (ret) return -EINVAL; + /* pin buffer into GTT */ + ret = nouveau_bo_pin_locked(nvbo, NOUVEAU_GEM_DOMAIN_GART, false); + if (ret) + ret = -EINVAL; + ttm_bo_unreserve(bo); - return 0; + return ret; } void nouveau_gem_prime_unpin(struct drm_gem_object *obj) { struct nouveau_bo *nvbo = nouveau_gem_object(obj); + struct ttm_buffer_object *bo = &nvbo->bo; + int ret; - nouveau_bo_unpin(nvbo); + ret = ttm_bo_reserve(bo, false, false, NULL); + if (ret) + return; + nouveau_bo_unpin_locked(nvbo); + ttm_bo_unreserve(bo); } struct dma_buf *nouveau_gem_prime_export(struct drm_gem_object *gobj,