From: Dmitry Osipenko <dmitry.osipenko@collabora.com>
To: "David Airlie" <airlied@gmail.com>,
"Gerd Hoffmann" <kraxel@redhat.com>,
"Gurchetan Singh" <gurchetansingh@chromium.org>,
"Chia-I Wu" <olvaffe@gmail.com>,
"Daniel Vetter" <daniel@ffwll.ch>,
"Daniel Almeida" <daniel.almeida@collabora.com>,
"Gustavo Padovan" <gustavo.padovan@collabora.com>,
"Daniel Stone" <daniel@fooishbar.org>,
"Tomeu Vizoso" <tomeu.vizoso@collabora.com>,
"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
"Maxime Ripard" <mripard@kernel.org>,
"Thomas Zimmermann" <tzimmermann@suse.de>,
"Rob Clark" <robdclark@gmail.com>,
"Sumit Semwal" <sumit.semwal@linaro.org>,
"Christian König" <christian.koenig@amd.com>,
"Qiang Yu" <yuq825@gmail.com>,
"Steven Price" <steven.price@arm.com>,
"Alyssa Rosenzweig" <alyssa.rosenzweig@collabora.com>,
"Rob Herring" <robh@kernel.org>, "Sean Paul" <sean@poorly.run>,
"Dmitry Baryshkov" <dmitry.baryshkov@linaro.org>,
"Abhinav Kumar" <quic_abhinavk@quicinc.com>
Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
kernel@collabora.com, virtualization@lists.linux-foundation.org
Subject: [PATCH v9 09/11] drm/gem: Add drm_gem_pin_unlocked()
Date: Wed, 23 Nov 2022 05:57:21 +0300 [thread overview]
Message-ID: <20221123025723.695075-10-dmitry.osipenko@collabora.com> (raw)
In-Reply-To: <20221123025723.695075-1-dmitry.osipenko@collabora.com>
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 <dmitry.osipenko@collabora.com>
---
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__ */
--
2.38.1
next prev parent reply other threads:[~2022-11-23 3:01 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-23 2:57 [PATCH v9 00/11] Add generic memory shrinker to VirtIO-GPU and Panfrost DRM drivers Dmitry Osipenko
2022-11-23 2:57 ` [PATCH v9 01/11] drm/msm/gem: Prevent blocking within shrinker loop Dmitry Osipenko
2022-11-29 16:40 ` Rob Clark
2022-11-23 2:57 ` [PATCH v9 02/11] drm/panfrost: Don't sync rpm suspension after mmu flushing Dmitry Osipenko
2022-11-23 15:59 ` Steven Price
2022-11-23 2:57 ` [PATCH v9 03/11] drm/gem: Add evict() callback to drm_gem_object_funcs Dmitry Osipenko
2022-11-23 15:58 ` Steven Price
2022-11-23 16:40 ` Dmitry Osipenko
2022-11-23 2:57 ` [PATCH v9 04/11] drm/shmem: Put booleans in the end of struct drm_gem_shmem_object Dmitry Osipenko
2022-11-23 2:57 ` [PATCH v9 05/11] drm/shmem: Switch to use drm_* debug helpers Dmitry Osipenko
2022-11-23 2:57 ` [PATCH v9 06/11] drm/shmem-helper: Don't use vmap_use_count for dma-bufs Dmitry Osipenko
2022-11-23 2:57 ` [PATCH v9 07/11] drm/shmem-helper: Switch to reservation lock Dmitry Osipenko
2022-11-23 2:57 ` [PATCH v9 08/11] drm/shmem-helper: Add memory shrinker Dmitry Osipenko
2022-11-23 15:56 ` kernel test robot
2022-11-23 18:08 ` kernel test robot
2022-11-23 2:57 ` Dmitry Osipenko [this message]
2022-11-23 2:57 ` [PATCH v9 10/11] drm/virtio: Support memory shrinking Dmitry Osipenko
2022-11-23 2:57 ` [PATCH v9 11/11] drm/panfrost: Switch to generic memory shrinker Dmitry Osipenko
2022-11-23 17:03 ` Steven Price
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