From: Dmitry Osipenko <dmitry.osipenko@collabora.com>
To: "David Airlie" <airlied@linux.ie>,
"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>,
"Gert Wollny" <gert.wollny@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 Herring" <robh@kernel.org>,
"Steven Price" <steven.price@arm.com>,
"Alyssa Rosenzweig" <alyssa.rosenzweig@collabora.com>,
"Rob Clark" <robdclark@gmail.com>,
"Emil Velikov" <emil.l.velikov@gmail.com>,
"Robin Murphy" <robin.murphy@arm.com>,
"Qiang Yu" <yuq825@gmail.com>,
"Sumit Semwal" <sumit.semwal@linaro.org>,
"Christian König" <christian.koenig@amd.com>,
"Pan, Xinhui" <Xinhui.Pan@amd.com>,
"Thierry Reding" <thierry.reding@gmail.com>,
"Tomasz Figa" <tfiga@chromium.org>,
"Marek Szyprowski" <m.szyprowski@samsung.com>,
"Mauro Carvalho Chehab" <mchehab@kernel.org>,
"Alex Deucher" <alexander.deucher@amd.com>,
"Jani Nikula" <jani.nikula@linux.intel.com>,
"Joonas Lahtinen" <joonas.lahtinen@linux.intel.com>,
"Rodrigo Vivi" <rodrigo.vivi@intel.com>,
"Tvrtko Ursulin" <tvrtko.ursulin@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org,
virtualization@lists.linux-foundation.org,
linaro-mm-sig@lists.linaro.org, amd-gfx@lists.freedesktop.org,
Dmitry Osipenko <dmitry.osipenko@collabora.com>,
linux-tegra@vger.kernel.org, Dmitry Osipenko <digetx@gmail.com>,
kernel@collabora.com, linux-media@vger.kernel.org
Subject: [PATCH v6 22/22] drm/panfrost: Switch to generic memory shrinker
Date: Fri, 27 May 2022 02:50:40 +0300 [thread overview]
Message-ID: <20220526235040.678984-23-dmitry.osipenko@collabora.com> (raw)
In-Reply-To: <20220526235040.678984-1-dmitry.osipenko@collabora.com>
Replace Panfrost's memory shrinker with a generic drm-shmem memory
shrinker.
Tested-by: Steven Price <steven.price@arm.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
---
drivers/gpu/drm/panfrost/Makefile | 1 -
drivers/gpu/drm/panfrost/panfrost_device.h | 4 -
drivers/gpu/drm/panfrost/panfrost_drv.c | 19 +--
drivers/gpu/drm/panfrost/panfrost_gem.c | 33 +++--
drivers/gpu/drm/panfrost/panfrost_gem.h | 9 --
.../gpu/drm/panfrost/panfrost_gem_shrinker.c | 129 ------------------
drivers/gpu/drm/panfrost/panfrost_job.c | 18 ++-
7 files changed, 42 insertions(+), 171 deletions(-)
delete mode 100644 drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c
diff --git a/drivers/gpu/drm/panfrost/Makefile b/drivers/gpu/drm/panfrost/Makefile
index b71935862417..ecf0864cb515 100644
--- a/drivers/gpu/drm/panfrost/Makefile
+++ b/drivers/gpu/drm/panfrost/Makefile
@@ -5,7 +5,6 @@ panfrost-y := \
panfrost_device.o \
panfrost_devfreq.o \
panfrost_gem.o \
- panfrost_gem_shrinker.o \
panfrost_gpu.o \
panfrost_job.o \
panfrost_mmu.o \
diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h
index 8b25278f34c8..fe04b21fc044 100644
--- a/drivers/gpu/drm/panfrost/panfrost_device.h
+++ b/drivers/gpu/drm/panfrost/panfrost_device.h
@@ -115,10 +115,6 @@ struct panfrost_device {
atomic_t pending;
} reset;
- struct mutex shrinker_lock;
- struct list_head shrinker_list;
- struct shrinker shrinker;
-
struct panfrost_devfreq pfdevfreq;
};
diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
index 859e240161d1..b77c99ba2475 100644
--- a/drivers/gpu/drm/panfrost/panfrost_drv.c
+++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
@@ -160,7 +160,6 @@ panfrost_lookup_bos(struct drm_device *dev,
break;
}
- atomic_inc(&bo->gpu_usecount);
job->mappings[i] = mapping;
}
@@ -392,7 +391,6 @@ static int panfrost_ioctl_madvise(struct drm_device *dev, void *data,
{
struct panfrost_file_priv *priv = file_priv->driver_priv;
struct drm_panfrost_madvise *args = data;
- struct panfrost_device *pfdev = dev->dev_private;
struct drm_gem_object *gem_obj;
struct panfrost_gem_object *bo;
int ret = 0;
@@ -409,7 +407,6 @@ static int panfrost_ioctl_madvise(struct drm_device *dev, void *data,
if (ret)
goto out_put_object;
- mutex_lock(&pfdev->shrinker_lock);
mutex_lock(&bo->mappings.lock);
if (args->madv == PANFROST_MADV_DONTNEED) {
struct panfrost_gem_mapping *first;
@@ -435,17 +432,8 @@ static int panfrost_ioctl_madvise(struct drm_device *dev, void *data,
args->retained = drm_gem_shmem_madvise(&bo->base, args->madv);
- if (args->retained) {
- if (args->madv == PANFROST_MADV_DONTNEED)
- list_move_tail(&bo->base.madv_list,
- &pfdev->shrinker_list);
- else if (args->madv == PANFROST_MADV_WILLNEED)
- list_del_init(&bo->base.madv_list);
- }
-
out_unlock_mappings:
mutex_unlock(&bo->mappings.lock);
- mutex_unlock(&pfdev->shrinker_lock);
dma_resv_unlock(bo->base.base.resv);
out_put_object:
drm_gem_object_put(gem_obj);
@@ -577,9 +565,6 @@ static int panfrost_probe(struct platform_device *pdev)
ddev->dev_private = pfdev;
pfdev->ddev = ddev;
- mutex_init(&pfdev->shrinker_lock);
- INIT_LIST_HEAD(&pfdev->shrinker_list);
-
err = panfrost_device_init(pfdev);
if (err) {
if (err != -EPROBE_DEFER)
@@ -601,7 +586,7 @@ static int panfrost_probe(struct platform_device *pdev)
if (err < 0)
goto err_out1;
- panfrost_gem_shrinker_init(ddev);
+ drm_gem_shmem_shrinker_register(ddev);
return 0;
@@ -619,8 +604,8 @@ static int panfrost_remove(struct platform_device *pdev)
struct panfrost_device *pfdev = platform_get_drvdata(pdev);
struct drm_device *ddev = pfdev->ddev;
+ drm_gem_shmem_shrinker_unregister(ddev);
drm_dev_unregister(ddev);
- panfrost_gem_shrinker_cleanup(ddev);
pm_runtime_get_sync(pfdev->dev);
pm_runtime_disable(pfdev->dev);
diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.c b/drivers/gpu/drm/panfrost/panfrost_gem.c
index 293e799e2fe8..f1436405e3a0 100644
--- a/drivers/gpu/drm/panfrost/panfrost_gem.c
+++ b/drivers/gpu/drm/panfrost/panfrost_gem.c
@@ -19,16 +19,6 @@ static void panfrost_gem_free_object(struct drm_gem_object *obj)
struct panfrost_gem_object *bo = to_panfrost_bo(obj);
struct panfrost_device *pfdev = obj->dev->dev_private;
- /*
- * Make sure the BO is no longer inserted in the shrinker list before
- * taking care of the destruction itself. If we don't do that we have a
- * race condition between this function and what's done in
- * panfrost_gem_shrinker_scan().
- */
- mutex_lock(&pfdev->shrinker_lock);
- list_del_init(&bo->base.madv_list);
- mutex_unlock(&pfdev->shrinker_lock);
-
/*
* If we still have mappings attached to the BO, there's a problem in
* our refcounting.
@@ -209,6 +199,25 @@ static const struct drm_gem_object_funcs panfrost_gem_funcs = {
.vm_ops = &drm_gem_shmem_vm_ops,
};
+static int panfrost_shmem_evict(struct drm_gem_shmem_object *shmem)
+{
+ struct panfrost_gem_object *bo = to_panfrost_bo(&shmem->base);
+
+ if (!drm_gem_shmem_is_purgeable(shmem))
+ return -EOPNOTSUPP;
+
+ if (!mutex_trylock(&bo->mappings.lock))
+ return -EBUSY;
+
+ panfrost_gem_teardown_mappings_locked(bo);
+
+ drm_gem_shmem_purge(shmem);
+
+ mutex_unlock(&bo->mappings.lock);
+
+ return 0;
+}
+
/**
* panfrost_gem_create_object - Implementation of driver->gem_create_object.
* @dev: DRM device
@@ -230,6 +239,7 @@ struct drm_gem_object *panfrost_gem_create_object(struct drm_device *dev, size_t
mutex_init(&obj->mappings.lock);
obj->base.base.funcs = &panfrost_gem_funcs;
obj->base.map_wc = !pfdev->coherent;
+ obj->base.evict = panfrost_shmem_evict;
return &obj->base.base;
}
@@ -266,6 +276,9 @@ panfrost_gem_create_with_handle(struct drm_file *file_priv,
if (ret)
return ERR_PTR(ret);
+ if (!bo->is_heap)
+ drm_gem_shmem_set_purgeable(shmem);
+
return bo;
}
diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.h b/drivers/gpu/drm/panfrost/panfrost_gem.h
index 8088d5fd8480..09da064f1c07 100644
--- a/drivers/gpu/drm/panfrost/panfrost_gem.h
+++ b/drivers/gpu/drm/panfrost/panfrost_gem.h
@@ -30,12 +30,6 @@ struct panfrost_gem_object {
struct mutex lock;
} mappings;
- /*
- * Count the number of jobs referencing this BO so we don't let the
- * shrinker reclaim this object prematurely.
- */
- atomic_t gpu_usecount;
-
bool noexec :1;
bool is_heap :1;
};
@@ -84,7 +78,4 @@ panfrost_gem_mapping_get(struct panfrost_gem_object *bo,
void panfrost_gem_mapping_put(struct panfrost_gem_mapping *mapping);
void panfrost_gem_teardown_mappings_locked(struct panfrost_gem_object *bo);
-void panfrost_gem_shrinker_init(struct drm_device *dev);
-void panfrost_gem_shrinker_cleanup(struct drm_device *dev);
-
#endif /* __PANFROST_GEM_H__ */
diff --git a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c b/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c
deleted file mode 100644
index 7cc32556f908..000000000000
--- a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c
+++ /dev/null
@@ -1,129 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* Copyright (C) 2019 Arm Ltd.
- *
- * Based on msm_gem_freedreno.c:
- * Copyright (C) 2016 Red Hat
- * Author: Rob Clark <robdclark@gmail.com>
- */
-
-#include <linux/list.h>
-
-#include <drm/drm_device.h>
-#include <drm/drm_gem_shmem_helper.h>
-
-#include "panfrost_device.h"
-#include "panfrost_gem.h"
-#include "panfrost_mmu.h"
-
-static bool panfrost_gem_shmem_is_purgeable(struct drm_gem_shmem_object *shmem)
-{
- return (shmem->madv > 0) &&
- !shmem->pages_pin_count && shmem->sgt &&
- !shmem->base.dma_buf && !shmem->base.import_attach;
-}
-
-static unsigned long
-panfrost_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc)
-{
- struct panfrost_device *pfdev =
- container_of(shrinker, struct panfrost_device, shrinker);
- struct drm_gem_shmem_object *shmem;
- unsigned long count = 0;
-
- if (!mutex_trylock(&pfdev->shrinker_lock))
- return 0;
-
- list_for_each_entry(shmem, &pfdev->shrinker_list, madv_list) {
- if (panfrost_gem_shmem_is_purgeable(shmem))
- count += shmem->base.size >> PAGE_SHIFT;
- }
-
- mutex_unlock(&pfdev->shrinker_lock);
-
- return count;
-}
-
-static bool panfrost_gem_purge(struct drm_gem_object *obj)
-{
- struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj);
- struct panfrost_gem_object *bo = to_panfrost_bo(obj);
- bool ret = false;
-
- if (atomic_read(&bo->gpu_usecount))
- return false;
-
- if (!mutex_trylock(&bo->mappings.lock))
- return false;
-
- if (!dma_resv_trylock(shmem->base.resv))
- goto unlock_mappings;
-
- panfrost_gem_teardown_mappings_locked(bo);
- drm_gem_shmem_purge(&bo->base);
- ret = true;
-
- dma_resv_unlock(shmem->base.resv);
-
-unlock_mappings:
- mutex_unlock(&bo->mappings.lock);
- return ret;
-}
-
-static unsigned long
-panfrost_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc)
-{
- struct panfrost_device *pfdev =
- container_of(shrinker, struct panfrost_device, shrinker);
- struct drm_gem_shmem_object *shmem, *tmp;
- unsigned long freed = 0;
-
- if (!mutex_trylock(&pfdev->shrinker_lock))
- return SHRINK_STOP;
-
- list_for_each_entry_safe(shmem, tmp, &pfdev->shrinker_list, madv_list) {
- if (freed >= sc->nr_to_scan)
- break;
- if (drm_gem_shmem_is_purgeable(shmem) &&
- panfrost_gem_purge(&shmem->base)) {
- freed += shmem->base.size >> PAGE_SHIFT;
- list_del_init(&shmem->madv_list);
- }
- }
-
- mutex_unlock(&pfdev->shrinker_lock);
-
- if (freed > 0)
- pr_info_ratelimited("Purging %lu bytes\n", freed << PAGE_SHIFT);
-
- return freed;
-}
-
-/**
- * panfrost_gem_shrinker_init - Initialize panfrost shrinker
- * @dev: DRM device
- *
- * This function registers and sets up the panfrost shrinker.
- */
-void panfrost_gem_shrinker_init(struct drm_device *dev)
-{
- struct panfrost_device *pfdev = dev->dev_private;
- pfdev->shrinker.count_objects = panfrost_gem_shrinker_count;
- pfdev->shrinker.scan_objects = panfrost_gem_shrinker_scan;
- pfdev->shrinker.seeks = DEFAULT_SEEKS;
- WARN_ON(register_shrinker(&pfdev->shrinker));
-}
-
-/**
- * panfrost_gem_shrinker_cleanup - Clean up panfrost shrinker
- * @dev: DRM device
- *
- * This function unregisters the panfrost shrinker.
- */
-void panfrost_gem_shrinker_cleanup(struct drm_device *dev)
-{
- struct panfrost_device *pfdev = dev->dev_private;
-
- if (pfdev->shrinker.nr_deferred) {
- unregister_shrinker(&pfdev->shrinker);
- }
-}
diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c
index 7c4208476fbd..5c327a79455f 100644
--- a/drivers/gpu/drm/panfrost/panfrost_job.c
+++ b/drivers/gpu/drm/panfrost/panfrost_job.c
@@ -271,6 +271,19 @@ static void panfrost_attach_object_fences(struct drm_gem_object **bos,
dma_resv_add_fence(bos[i]->resv, fence, DMA_RESV_USAGE_WRITE);
}
+static int panfrost_objects_prepare(struct drm_gem_object **bos, int bo_count)
+{
+ struct panfrost_gem_object *bo;
+ int ret = 0;
+
+ while (!ret && bo_count--) {
+ bo = to_panfrost_bo(bos[bo_count]);
+ ret = bo->base.madv ? -ENOMEM : 0;
+ }
+
+ return ret;
+}
+
int panfrost_job_push(struct panfrost_job *job)
{
struct panfrost_device *pfdev = job->pfdev;
@@ -282,6 +295,10 @@ int panfrost_job_push(struct panfrost_job *job)
if (ret)
return ret;
+ ret = panfrost_objects_prepare(job->bos, job->bo_count);
+ if (ret)
+ goto unlock;
+
mutex_lock(&pfdev->sched_lock);
drm_sched_job_arm(&job->base);
@@ -323,7 +340,6 @@ static void panfrost_job_cleanup(struct kref *ref)
if (!job->mappings[i])
break;
- atomic_dec(&job->mappings[i]->obj->gpu_usecount);
panfrost_gem_mapping_put(job->mappings[i]);
}
kvfree(job->mappings);
--
2.35.3
next prev parent reply other threads:[~2022-05-26 23:55 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-26 23:50 [PATCH v6 00/22] Add generic memory shrinker to VirtIO-GPU and Panfrost DRM drivers Dmitry Osipenko
2022-05-26 23:50 ` [PATCH v6 01/22] drm/gem: Properly annotate WW context on drm_gem_lock_reservations() error Dmitry Osipenko
2022-06-28 20:12 ` Thomas Hellström (Intel)
2022-06-29 8:23 ` Dmitry Osipenko
2022-05-26 23:50 ` [PATCH v6 02/22] drm/gem: Move mapping of imported dma-bufs to drm_gem_mmap_obj() Dmitry Osipenko
2022-06-29 6:40 ` Thomas Hellström (Intel)
2022-06-29 8:22 ` Dmitry Osipenko
2022-06-29 8:43 ` Thomas Hellström (Intel)
2022-06-29 23:06 ` Dmitry Osipenko
2022-07-04 12:33 ` [Linaro-mm-sig] " Christian König
2022-07-04 22:44 ` Dmitry Osipenko
2022-05-26 23:50 ` [PATCH v6 03/22] drm/panfrost: Put mapping instead of shmem obj on panfrost_mmu_map_fault_addr() error Dmitry Osipenko
2022-05-26 23:50 ` [PATCH v6 04/22] drm/panfrost: Fix shrinker list corruption by madvise IOCTL Dmitry Osipenko
2022-05-27 15:56 ` Alyssa Rosenzweig
2022-05-30 9:41 ` Steven Price
2022-05-26 23:50 ` [PATCH v6 05/22] drm/virtio: Correct drm_gem_shmem_get_sg_table() error handling Dmitry Osipenko
2022-05-26 23:50 ` [PATCH v6 06/22] drm/virtio: Check whether transferred 2D BO is shmem Dmitry Osipenko
2022-05-26 23:50 ` [PATCH v6 07/22] drm/virtio: Unlock reservations on virtio_gpu_object_shmem_init() error Dmitry Osipenko
2022-05-26 23:50 ` [PATCH v6 08/22] drm/virtio: Unlock reservations on dma_resv_reserve_fences() error Dmitry Osipenko
2022-06-29 6:43 ` Thomas Hellström (Intel)
2022-05-26 23:50 ` [PATCH v6 09/22] drm/virtio: Use appropriate atomic state in virtio_gpu_plane_cleanup_fb() Dmitry Osipenko
2022-05-26 23:50 ` [PATCH v6 10/22] drm/shmem-helper: Add missing vunmap on error Dmitry Osipenko
2022-05-26 23:50 ` [PATCH v6 11/22] drm/shmem-helper: Correct doc-comment of drm_gem_shmem_get_sg_table() Dmitry Osipenko
2022-05-26 23:50 ` [PATCH v6 12/22] drm/virtio: Simplify error handling of virtio_gpu_object_create() Dmitry Osipenko
2022-05-26 23:50 ` [PATCH v6 13/22] drm/virtio: Improve DMA API usage for shmem BOs Dmitry Osipenko
2022-05-26 23:50 ` [PATCH v6 14/22] dma-buf: Introduce new locking convention Dmitry Osipenko
2022-05-30 6:50 ` Christian König
2022-05-30 13:26 ` Dmitry Osipenko
2022-05-30 13:41 ` Christian König
2022-05-30 13:57 ` Dmitry Osipenko
2022-06-28 21:26 ` Thomas Hellström (Intel)
2022-07-01 10:43 ` Dmitry Osipenko
2022-07-04 22:38 ` Dmitry Osipenko
2022-07-05 10:52 ` Dmitry Osipenko
2022-05-26 23:50 ` [PATCH v6 15/22] drm/shmem-helper: Don't use vmap_use_count for dma-bufs Dmitry Osipenko
2022-05-26 23:50 ` [PATCH v6 16/22] drm/shmem-helper: Use reservation lock Dmitry Osipenko
2022-05-26 23:50 ` [PATCH v6 17/22] drm/shmem-helper: Add generic memory shrinker Dmitry Osipenko
2022-06-05 16:47 ` Daniel Vetter
2022-06-05 18:32 ` Rob Clark
2022-06-05 18:45 ` Daniel Vetter
2022-06-06 10:57 ` Christian König
2022-06-07 15:33 ` Dmitry Osipenko
2022-06-19 17:53 ` Rob Clark
2022-06-20 14:08 ` Dmitry Osipenko
2022-06-20 15:18 ` Rob Clark
2022-06-24 20:23 ` Daniel Vetter
2022-06-24 20:21 ` Daniel Vetter
2022-06-20 15:37 ` Rob Clark
2022-06-21 16:39 ` Dmitry Osipenko
2022-05-26 23:50 ` [PATCH v6 18/22] drm/gem: Add drm_gem_pin_unlocked() Dmitry Osipenko
2022-05-26 23:50 ` [PATCH v6 19/22] drm/virtio: Support memory shrinking Dmitry Osipenko
2022-05-26 23:50 ` [PATCH v6 20/22] drm/virtio: Use dev_is_pci() Dmitry Osipenko
2022-05-26 23:50 ` [PATCH v6 21/22] drm/virtio: Return proper error codes instead of -1 Dmitry Osipenko
2022-05-26 23:50 ` Dmitry Osipenko [this message]
2022-05-27 11:48 ` [PATCH v6 22/22] drm/panfrost: Switch to generic memory shrinker Alyssa Rosenzweig
2022-06-10 14:40 ` [PATCH v6 00/22] Add generic memory shrinker to VirtIO-GPU and Panfrost DRM drivers Dmitry Osipenko
2022-06-28 12:31 ` Robin Murphy
2022-06-28 12:50 ` Dmitry Osipenko
2022-06-28 16:48 ` Rob Clark
2022-06-28 23:11 ` Dmitry Osipenko
2022-06-28 12:51 ` Dmitry Osipenko
2022-06-28 13:11 ` Dmitry Osipenko
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