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From: Asahi Lina <lina@asahilina.net>
To: "Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
	"Maxime Ripard" <mripard@kernel.org>,
	"Thomas Zimmermann" <tzimmermann@suse.de>,
	"David Airlie" <airlied@gmail.com>,
	"Daniel Vetter" <daniel@ffwll.ch>,
	"Miguel Ojeda" <ojeda@kernel.org>,
	"Alex Gaynor" <alex.gaynor@gmail.com>,
	"Wedson Almeida Filho" <wedsonaf@gmail.com>,
	"Boqun Feng" <boqun.feng@gmail.com>,
	"Gary Guo" <gary@garyguo.net>,
	"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
	"Sumit Semwal" <sumit.semwal@linaro.org>,
	"Christian König" <christian.koenig@amd.com>,
	"Luben Tuikov" <luben.tuikov@amd.com>,
	"Jarkko Sakkinen" <jarkko@kernel.org>,
	"Dave Hansen" <dave.hansen@linux.intel.com>
Cc: Alyssa Rosenzweig <alyssa@rosenzweig.io>,
	Karol Herbst <kherbst@redhat.com>,
	Ella Stanforth <ella@iglunix.org>,
	Faith Ekstrand <faith.ekstrand@collabora.com>,
	Mary <mary@mary.zone>,
	linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
	rust-for-linux@vger.kernel.org, linux-media@vger.kernel.org,
	linaro-mm-sig@lists.linaro.org, linux-sgx@vger.kernel.org,
	asahi@lists.linux.dev, Asahi Lina <lina@asahilina.net>
Subject: [PATCH RFC 13/18] drm/gem: Add a flag to control whether objects can be exported
Date: Tue, 07 Mar 2023 23:25:38 +0900	[thread overview]
Message-ID: <20230307-rust-drm-v1-13-917ff5bc80a8@asahilina.net> (raw)
In-Reply-To: <20230307-rust-drm-v1-0-917ff5bc80a8@asahilina.net>

Drivers may want to support driver-private objects, which cannot be
shared. This allows them to share a single lock and enables other
optimizations.

Add an `exportable` field to drm_gem_object, which blocks PRIME export
if set to false. It is initialized to true in
drm_gem_private_object_init.

Signed-off-by: Asahi Lina <lina@asahilina.net>
---
 drivers/gpu/drm/drm_gem.c   | 1 +
 drivers/gpu/drm/drm_prime.c | 5 +++++
 include/drm/drm_gem.h       | 8 ++++++++
 3 files changed, 14 insertions(+)

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 7a3cb08dc942..152ad9295a8d 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -166,6 +166,7 @@ void drm_gem_private_object_init(struct drm_device *dev,
 
 	drm_vma_node_reset(&obj->vma_node);
 	INIT_LIST_HEAD(&obj->lru_node);
+	obj->exportable = true;
 }
 EXPORT_SYMBOL(drm_gem_private_object_init);
 
diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
index f924b8b4ab6b..9d2dd982580e 100644
--- a/drivers/gpu/drm/drm_prime.c
+++ b/drivers/gpu/drm/drm_prime.c
@@ -391,6 +391,11 @@ static struct dma_buf *export_and_register_object(struct drm_device *dev,
 		return dmabuf;
 	}
 
+	if (!obj->exportable) {
+		dmabuf = ERR_PTR(-EINVAL);
+		return dmabuf;
+	}
+
 	if (obj->funcs && obj->funcs->export)
 		dmabuf = obj->funcs->export(obj, flags);
 	else
diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h
index 772a4adf5287..852dec3cf763 100644
--- a/include/drm/drm_gem.h
+++ b/include/drm/drm_gem.h
@@ -361,6 +361,14 @@ struct drm_gem_object {
 	 * The current LRU list that the GEM object is on.
 	 */
 	struct drm_gem_lru *lru;
+
+	/**
+	 * @exportable:
+	 *
+	 * Whether this GEM object can be exported via the drm_gem_object_funcs->export
+	 * callback. Defaults to true.
+	 */
+	bool exportable;
 };
 
 /**

-- 
2.35.1


  parent reply	other threads:[~2023-03-07 14:33 UTC|newest]

Thread overview: 122+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-07 14:25 [PATCH RFC 00/18] Rust DRM subsystem abstractions (& preview AGX driver) Asahi Lina
2023-03-07 14:25 ` [PATCH RFC 01/18] rust: drm: ioctl: Add DRM ioctl abstraction Asahi Lina
2023-03-07 14:48   ` Karol Herbst
2023-03-07 14:51     ` Karol Herbst
2023-03-07 15:32   ` Maíra Canal
2023-03-09  5:32     ` Asahi Lina
2023-03-09  6:15       ` Dave Airlie
2023-03-09 12:09         ` Maíra Canal
2023-03-07 17:34   ` Björn Roy Baron
2023-03-09  6:04     ` Asahi Lina
2023-03-09 20:24       ` Faith Ekstrand
2023-03-09 20:39         ` Karol Herbst
2023-03-10  6:21           ` Asahi Lina
2023-04-13  9:23   ` Daniel Vetter
2023-03-07 14:25 ` [PATCH RFC 02/18] rust: drm: Add Device and Driver abstractions Asahi Lina
2023-03-07 18:19   ` Björn Roy Baron
2023-03-09  6:10     ` Asahi Lina
2023-03-10 18:56   ` Boqun Feng
2023-03-11  5:41   ` Boqun Feng
2023-04-05 17:10   ` Daniel Vetter
2023-03-07 14:25 ` [PATCH RFC 03/18] rust: drm: file: Add File abstraction Asahi Lina
2023-03-09 21:16   ` Faith Ekstrand
2023-03-09 22:16     ` Asahi Lina
2023-03-13 17:49       ` Faith Ekstrand
2023-03-14  2:07         ` Boqun Feng
2023-04-05 11:25           ` Daniel Vetter
2023-03-07 14:25 ` [PATCH RFC 04/18] rust: drm: gem: Add GEM object abstraction Asahi Lina
2023-04-05 11:08   ` Daniel Vetter
2023-04-05 11:19     ` Miguel Ojeda
2023-04-05 11:22       ` Daniel Vetter
2023-04-05 12:32         ` Miguel Ojeda
2023-04-05 12:36           ` Daniel Vetter
2023-03-07 14:25 ` [PATCH RFC 05/18] drm/gem-shmem: Export VM ops functions Asahi Lina
2023-03-07 14:25 ` [PATCH RFC 06/18] rust: drm: gem: shmem: Add DRM shmem helper abstraction Asahi Lina
2023-03-08 13:38   ` Maíra Canal
2023-03-09  5:25     ` Asahi Lina
2023-03-09 11:47       ` Maíra Canal
2023-03-09 14:16         ` Asahi Lina
2023-03-07 14:25 ` [PATCH RFC 07/18] rust: drm: mm: Add DRM MM Range Allocator abstraction Asahi Lina
2023-04-06 14:15   ` Daniel Vetter
2023-04-06 15:28     ` Miguel Ojeda
2023-04-06 15:45       ` Daniel Vetter
2023-04-06 17:19         ` Miguel Ojeda
2023-04-06 15:53     ` Asahi Lina
2023-04-06 16:13       ` [Linaro-mm-sig] " Daniel Vetter
2023-04-06 16:39         ` Asahi Lina
2023-03-07 14:25 ` [PATCH RFC 08/18] rust: dma_fence: Add DMA Fence abstraction Asahi Lina
2023-04-05 11:10   ` Daniel Vetter
2023-03-07 14:25 ` [PATCH RFC 09/18] rust: drm: syncobj: Add DRM Sync Object abstraction Asahi Lina
2023-04-05 12:33   ` Daniel Vetter
2023-04-06 16:04     ` Asahi Lina
2023-03-07 14:25 ` [PATCH RFC 10/18] drm/scheduler: Add can_run_job callback Asahi Lina
2023-03-08  8:46   ` Christian König
2023-03-08  9:41     ` Asahi Lina
2023-03-08 10:00       ` Christian König
2023-03-08 14:53         ` Asahi Lina
2023-03-08 15:30           ` Christian König
2023-03-08 16:44             ` Asahi Lina
2023-03-08 17:57               ` Christian König
2023-03-08 19:05                 ` Asahi Lina
2023-03-08 19:12                   ` Christian König
2023-03-08 19:45                     ` Asahi Lina
2023-03-08 20:14                       ` Christian König
2023-03-09  6:30                         ` Asahi Lina
2023-03-09  8:05                           ` Christian König
2023-03-09  9:14                             ` Asahi Lina
2023-03-09 18:50                               ` Faith Ekstrand
2023-03-10  9:16                                 ` Asahi Lina
2023-03-08 12:39     ` Karol Herbst
2023-03-08 13:47       ` Christian König
2023-03-08 14:43         ` Karol Herbst
2023-03-08 15:02           ` Christian König
2023-03-08 15:19             ` Karol Herbst
2023-03-16 13:40               ` Daniel Vetter
2023-04-05 13:40   ` Daniel Vetter
2023-04-05 14:14     ` Christian König
2023-04-05 14:21       ` Daniel Vetter
2023-03-07 14:25 ` [PATCH RFC 11/18] drm/scheduler: Clean up jobs when the scheduler is torn down Asahi Lina
2023-03-08  9:57   ` Maarten Lankhorst
2023-03-08 10:03     ` Christian König
2023-03-08 15:18       ` Asahi Lina
2023-03-08 15:42         ` Christian König
2023-03-08 17:32           ` Asahi Lina
2023-03-08 18:12             ` Christian König
2023-03-08 19:37               ` Asahi Lina
2023-03-09  8:42                 ` Christian König
2023-03-09  9:43                   ` Asahi Lina
2023-03-09 11:47                     ` Christian König
2023-03-09 13:48                       ` Asahi Lina
2023-03-09 19:59                     ` Faith Ekstrand
2023-03-10  9:58                       ` Asahi Lina
2023-03-13 20:11                         ` Faith Ekstrand
2023-03-08 17:39           ` alyssa
2023-03-08 17:44             ` Asahi Lina
2023-03-08 18:13             ` Christian König
2023-04-05 13:52   ` Daniel Vetter
2023-03-07 14:25 ` [PATCH RFC 12/18] rust: drm: sched: Add GPU scheduler abstraction Asahi Lina
2023-04-05 15:43   ` Daniel Vetter
2023-04-05 19:29     ` Daniel Vetter
2023-04-18  8:45       ` Daniel Vetter
2023-03-07 14:25 ` Asahi Lina [this message]
2023-04-05 14:55   ` [PATCH RFC 13/18] drm/gem: Add a flag to control whether objects can be exported Daniel Vetter
2023-03-07 14:25 ` [PATCH RFC 14/18] rust: drm: gem: Add set_exportable() method Asahi Lina
2023-03-07 14:25 ` [PATCH RFC 15/18] drm/asahi: Add the Asahi driver UAPI [DO NOT MERGE] Asahi Lina
2023-03-07 15:28   ` Karol Herbst
2023-03-07 14:25 ` [PATCH RFC 16/18] rust: bindings: Bind the Asahi DRM UAPI Asahi Lina
2023-03-07 14:25 ` [PATCH RFC 17/18] rust: macros: Add versions macro Asahi Lina
2023-03-07 16:17 ` [PATCH RFC 00/18] Rust DRM subsystem abstractions (& preview AGX driver) Asahi Lina
     [not found] ` <20230307-rust-drm-v1-18-917ff5bc80a8@asahilina.net>
2023-04-05 14:44   ` [PATCH RFC 18/18] drm/asahi: Add the Asahi driver for Apple AGX GPUs Daniel Vetter
2023-04-06  5:02     ` Asahi Lina
2023-04-06  5:09       ` Asahi Lina
2023-04-06 11:25       ` [Linaro-mm-sig] " Daniel Vetter
2023-04-06 13:32         ` Asahi Lina
2023-04-06 13:54           ` Daniel Vetter
     [not found]   ` <ZC2HtBOaoUAzVCVH@phenom.ffwll.local>
2023-04-06  4:44     ` Asahi Lina
2023-04-06  5:09       ` Asahi Lina
2023-04-06 11:26         ` Daniel Vetter
2023-04-06 10:42       ` [Linaro-mm-sig] " Daniel Vetter
2023-04-06 11:55       ` Daniel Vetter
2023-04-06 13:15         ` Asahi Lina
2023-04-06 13:48           ` Daniel Vetter
2023-04-06 15:19             ` Asahi Lina

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