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eca775e222
In order to store device DMA parameters, the DMA framework depends on the device's dma_parms field to point at a valid memory location. Add backing storage for this in struct host1x_memory_context and point to it. Reported-by: Jonathan Hunter <jonathanh@nvidia.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Tested-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240916133320.368620-1-thierry.reding@gmail.com (cherry picked from commit b4ad4ef374d66cc8df3188bb1ddb65bce5fc9e50) Bug 4876974 Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Change-Id: I0a7f9c9f49a5e4580193d5814ff4a6a15f8014c8 Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3268196 (cherry picked from commit 027ee6a9a0b3848fbaae21c788064f59072c0978) Signed-off-by: Paritosh Dixit <paritoshd@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3326864 GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Host1x context devices
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*
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* SPDX-FileCopyrightText: Copyright (c) 2020-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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*/
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#ifndef __HOST1X_CONTEXT_H
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#define __HOST1X_CONTEXT_H
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#include <linux/mutex.h>
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#include <linux/refcount.h>
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struct host1x;
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extern struct bus_type host1x_context_device_bus_type;
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struct host1x_memory_context_list {
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struct mutex lock;
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struct host1x_hw_memory_context *devs;
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unsigned int len;
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struct list_head waiters;
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};
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struct host1x_hw_memory_context {
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struct host1x *host;
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refcount_t ref;
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struct pid *owner;
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struct device_dma_parameters dma_parms;
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struct device dev;
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u64 dma_mask;
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u32 stream_id;
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struct list_head owners;
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unsigned int active;
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};
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#ifdef CONFIG_IOMMU_API
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int host1x_memory_context_list_init(struct host1x *host1x);
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void host1x_memory_context_list_free(struct host1x_memory_context_list *cdl);
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#else
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static inline int host1x_memory_context_list_init(struct host1x *host1x)
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{
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return 0;
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}
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static inline void host1x_memory_context_list_free(struct host1x_memory_context_list *cdl)
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{
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}
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#endif
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#endif
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