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With the introduction of per-FD address space, the same BO can be mapped in different address space if the BO is globally visible (GEM_FLINK) and opened in different context or if the dmabuf is self-imported. The current implementation does not take case into account, and attaches the mapping directly to the panfrost_gem_object. Let's create a panfrost_gem_mapping struct and allow multiple mappings per BO. The mappings are refcounted which helps solve another problem where mappings were torn down (GEM handle closed by userspace) while GPU jobs accessing those BOs were still in-flight. Jobs now keep a reference on the mappings they use. v2 (robh): - Minor review comment clean-ups from Steven - Use list_is_singular helper - Just WARN if we add a mapping when madvise state is not WILLNEED. With that, drop the use of object_name_lock. v3 (robh): - Revert returning list iterator in panfrost_gem_mapping_get() Fixes:a5efb4c9a5("drm/panfrost: Restructure the GEM object creation") Fixes:7282f7645d("drm/panfrost: Implement per FD address spaces") Cc: <stable@vger.kernel.org> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Boris Brezillon <boris.brezillon@collabora.com> Reviewed-by: Steven Price <steven.price@arm.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200116021554.15090-1-robh@kernel.org
53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright 2019 Collabora ltd. */
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#ifndef __PANFROST_JOB_H__
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#define __PANFROST_JOB_H__
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#include <uapi/drm/panfrost_drm.h>
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#include <drm/gpu_scheduler.h>
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struct panfrost_device;
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struct panfrost_gem_object;
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struct panfrost_file_priv;
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struct panfrost_job {
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struct drm_sched_job base;
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struct kref refcount;
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struct panfrost_device *pfdev;
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struct panfrost_file_priv *file_priv;
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/* Optional fences userspace can pass in for the job to depend on. */
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struct dma_fence **in_fences;
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u32 in_fence_count;
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/* Fence to be signaled by IRQ handler when the job is complete. */
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struct dma_fence *done_fence;
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__u64 jc;
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__u32 requirements;
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__u32 flush_id;
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/* Exclusive fences we have taken from the BOs to wait for */
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struct dma_fence **implicit_fences;
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struct panfrost_gem_mapping **mappings;
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struct drm_gem_object **bos;
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u32 bo_count;
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/* Fence to be signaled by drm-sched once its done with the job */
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struct dma_fence *render_done_fence;
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};
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int panfrost_job_init(struct panfrost_device *pfdev);
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void panfrost_job_fini(struct panfrost_device *pfdev);
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int panfrost_job_open(struct panfrost_file_priv *panfrost_priv);
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void panfrost_job_close(struct panfrost_file_priv *panfrost_priv);
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int panfrost_job_push(struct panfrost_job *job);
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void panfrost_job_put(struct panfrost_job *job);
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void panfrost_job_enable_interrupts(struct panfrost_device *pfdev);
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int panfrost_job_is_idle(struct panfrost_device *pfdev);
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#endif
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