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7d2d6d0129
panfrost_ioctl_madvise() and panfrost_gem_purge() acquire the mappings
and shmem locks in different orders, thus leading to a potential
the mappings lock first.
Fixes: bdefca2d8d ("drm/panfrost: Add the panfrost_gem_mapping concept")
Cc: <stable@vger.kernel.org>
Cc: Christian Hewitt <christianshewitt@gmail.com>
Reported-by: Christian Hewitt <christianshewitt@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201101174016.839110-1-boris.brezillon@collabora.com
91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright 2019 Linaro, Ltd, Rob Herring <robh@kernel.org> */
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#ifndef __PANFROST_GEM_H__
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#define __PANFROST_GEM_H__
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#include <drm/drm_gem_shmem_helper.h>
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#include <drm/drm_mm.h>
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struct panfrost_mmu;
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struct panfrost_gem_object {
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struct drm_gem_shmem_object base;
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struct sg_table *sgts;
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/*
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* Use a list for now. If searching a mapping ever becomes the
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* bottleneck, we should consider using an RB-tree, or even better,
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* let the core store drm_gem_object_mapping entries (where we
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* could place driver specific data) instead of drm_gem_object ones
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* in its drm_file->object_idr table.
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*
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* struct drm_gem_object_mapping {
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* struct drm_gem_object *obj;
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* void *driver_priv;
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* };
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*/
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struct {
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struct list_head list;
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struct mutex lock;
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} mappings;
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/*
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* Count the number of jobs referencing this BO so we don't let the
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* shrinker reclaim this object prematurely.
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*/
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atomic_t gpu_usecount;
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bool noexec :1;
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bool is_heap :1;
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};
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struct panfrost_gem_mapping {
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struct list_head node;
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struct kref refcount;
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struct panfrost_gem_object *obj;
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struct drm_mm_node mmnode;
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struct panfrost_mmu *mmu;
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bool active :1;
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};
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static inline
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struct panfrost_gem_object *to_panfrost_bo(struct drm_gem_object *obj)
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{
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return container_of(to_drm_gem_shmem_obj(obj), struct panfrost_gem_object, base);
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}
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static inline struct panfrost_gem_mapping *
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drm_mm_node_to_panfrost_mapping(struct drm_mm_node *node)
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{
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return container_of(node, struct panfrost_gem_mapping, mmnode);
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}
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struct drm_gem_object *panfrost_gem_create_object(struct drm_device *dev, size_t size);
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struct drm_gem_object *
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panfrost_gem_prime_import_sg_table(struct drm_device *dev,
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struct dma_buf_attachment *attach,
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struct sg_table *sgt);
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struct panfrost_gem_object *
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panfrost_gem_create_with_handle(struct drm_file *file_priv,
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struct drm_device *dev, size_t size,
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u32 flags,
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uint32_t *handle);
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int panfrost_gem_open(struct drm_gem_object *obj, struct drm_file *file_priv);
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void panfrost_gem_close(struct drm_gem_object *obj,
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struct drm_file *file_priv);
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struct panfrost_gem_mapping *
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panfrost_gem_mapping_get(struct panfrost_gem_object *bo,
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struct panfrost_file_priv *priv);
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void panfrost_gem_mapping_put(struct panfrost_gem_mapping *mapping);
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void panfrost_gem_teardown_mappings_locked(struct panfrost_gem_object *bo);
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void panfrost_gem_shrinker_init(struct drm_device *dev);
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void panfrost_gem_shrinker_cleanup(struct drm_device *dev);
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#endif /* __PANFROST_GEM_H__ */
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