mirror of
git://nv-tegra.nvidia.com/linux-nv-oot.git
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8e837b02d4
in order to support unique identification of semaphores while tracing across VMs, a unique identifier is added during buffer pin and is emitted in traces. Bug 4149342 Change-Id: I88e53be197f5354834795aab197e8de39535ac5c Signed-off-by: omar nemri <onemri@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2938555 Reviewed-by: Nikita Chumakov <nchumakov@nvidia.com> Reviewed-by: Oleg Sikorskiy <osikorskiy@nvidia.com> Reviewed-by: Amruta Sai Anusha Bhamidipati <abhamidipati@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
216 lines
6.2 KiB
C
216 lines
6.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2016-2023, NVIDIA CORPORATION. All rights reserved.
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*
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* NVPVA Buffer Management Header
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*/
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#ifndef __NVPVA_NVPVA_BUFFER_H__
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#define __NVPVA_NVPVA_BUFFER_H__
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#include <linux/dma-buf.h>
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#include "pva_bit_helpers.h"
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enum nvpva_buffers_heap {
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NVPVA_BUFFERS_HEAP_DRAM = 0,
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};
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/**
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* @brief Information needed for buffers
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*
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* pdev Pointer to NVHOST device
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* rb_root RB tree root for of all the buffers used by a file pointer
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* list List for traversing through all the buffers
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* mutex Mutex for the buffer tree and the buffer list
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* kref Reference count for the bufferlist
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* ids unique ID assigned to a pinned buffer
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*/
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#define NVPVA_ID_SEGMENT_SIZE 32
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#define NVPVA_MAX_NUM_UNIQUE_IDS (NVPVA_ID_SEGMENT_SIZE * 1024)
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#define NVPVA_NUM_ID_SEGMENTS \
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(NVPVA_MAX_NUM_UNIQUE_IDS/NVPVA_ID_SEGMENT_SIZE)
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struct nvpva_buffers {
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struct platform_device *pdev;
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struct platform_device *pdev_priv;
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struct platform_device *pdev_user;
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struct list_head list_head;
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struct rb_root rb_root;
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struct rb_root rb_root_id;
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struct mutex mutex;
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struct kref kref;
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uint32_t ids[NVPVA_NUM_ID_SEGMENTS];
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uint32_t num_assigned_ids;
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};
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/**
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* @brief Initialize the nvpva_buffer per open request
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*
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* This function allocates nvpva_buffers struct and init the bufferlist
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* and mutex.
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*
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* @param nvpva_buffers Pointer to nvpva_buffers struct
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* @return nvpva_buffers pointer on success
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* or negative on error
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*
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*/
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struct nvpva_buffers
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*nvpva_buffer_init(struct platform_device *pdev,
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struct platform_device *pdev_priv,
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struct platform_device *pdev_user);
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/**
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* @brief Pin the memhandle using dma_buf functions
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*
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* This function maps the buffer memhandle list passed from user side
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* to device iova.
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*
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* @param nvpva_buffers Pointer to nvpva_buffers struct
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* @param dmabufs Pointer to dmabuffer list
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* @param offset pointer to offsets of regions to be pinned
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* @param size pointer to sizes of regions to be pinned
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* @param count Number of memhandles in the list
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* @return 0 on success or negative on error
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*
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*/
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int nvpva_buffer_pin(struct nvpva_buffers *nvpva_buffers,
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struct dma_buf **dmabufs,
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u64 *offset,
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u64 *size,
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u64 *serial_id,
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u32 segment,
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u32 count,
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u32 *id,
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u32 *eerr);
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/**
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* @brief UnPins the mapped address space.
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*
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* @param nvpva_buffers Pointer to nvpva_buffer struct
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* @param dmabufs Pointer to dmabuffer list
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* @param count Pointer to offset list
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* @param offset Pointer to size list
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* @param count Number of memhandles in the list
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* @return None
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*
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*/
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void
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nvpva_buffer_unpin(struct nvpva_buffers *nvpva_buffers,
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struct dma_buf **dmabufs,
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u64 *offset,
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u64 *size,
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u32 count);
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/**
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* @brief UnPins the mapped address space.
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*
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* @param nvpva_buffers Pointer to nvpva_buffer struct
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* @param ids Pointer to id list
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* @param count Number of memhandles in the list
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* @param id pointer to variable where assigned
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* ID is returned
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* @return None
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*
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*/
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void nvpva_buffer_unpin_id(struct nvpva_buffers *nvpva_buffers,
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u32 *ids,
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u32 count);
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/**
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* @brief Pin the mapped buffer for a task submit
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*
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* This function increased the reference count for a mapped buffer during
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* task submission.
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*
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* @param nvpva_buffers Pointer to nvpva_buffer struct
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* @param dmabufs Pointer to dmabuffer list
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* @param count Number of memhandles in the list
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* @param paddr Pointer to IOVA list
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* @param psize Pointer to size of buffer to return
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* @param heap Pointer to a list of heaps. This is
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* filled by the routine.
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*
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* @return 0 on success or negative on error
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*
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*/
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int nvpva_buffer_submit_pin(struct nvpva_buffers *nvpva_buffers,
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struct dma_buf **dmabufs, u32 count,
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dma_addr_t *paddr, size_t *psize,
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enum nvpva_buffers_heap *heap);
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/**
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* @brief Pin the mapped buffer for a task submit
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*
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* This function increased the reference count for a mapped buffer during
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* task submission.
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*
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* @param nvpva_buffers Pointer to nvpva_buffer struct
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* @param ids Pointer to id list
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* @param count Number of memhandles in the list
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* @param paddr Pointer to IOVA list
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* @param psize Pointer to size of buffer to return
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* @param serial_ids Pointer to unique serial id to return
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* @param heap Pointer to a list of heaps. This is
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* filled by the routine.
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*
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* @return 0 on success or negative on error
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*
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*/
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int nvpva_buffer_submit_pin_id(struct nvpva_buffers *nvpva_buffers,
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u32 *ids,
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u32 count,
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struct dma_buf **dmabuf,
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dma_addr_t *paddr,
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u64 *psize,
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u64 *serial_ids,
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enum nvpva_buffers_heap *heap);
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/**
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* @brief UnPins the mapped address space on task completion.
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*
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* This function decrease the reference count for a mapped buffer when the
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* task get completed or aborted.
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*
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* @param nvpva_buffers Pointer to nvpva_buffer struct
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* @param dmabufs Pointer to dmabuffer list
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* @param count Number of memhandles in the list
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* @return None
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*
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*/
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void nvpva_buffer_submit_unpin(struct nvpva_buffers *nvpva_buffers,
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struct dma_buf **dmabufs, u32 count);
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/**
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* @brief UnPins the mapped address space on task completion.
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*
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* This function decrease the reference count for a mapped buffer when the
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* task get completed or aborted.
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*
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* @param nvpva_buffers Pointer to nvpva_buffer struct
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* @param ids Pointer to dmabuffer list
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* @param count Number of memhandles in the list
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* @return None
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*
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*/
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void nvpva_buffer_submit_unpin_id(struct nvpva_buffers *nvpva_buffers,
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u32 *ids, u32 count);
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/**
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* @brief Drop a user reference to buffer structure
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*
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* @param nvpva_buffers Pointer to nvpva_buffer struct
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* @return None
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*
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*/
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void nvpva_buffer_release(struct nvpva_buffers *nvpva_buffers);
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/**
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* @brief Returns dma buf and dma addr for a given handle
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*
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* @param nvpva_buffers Pointer to nvpva_buffer struct
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* @param dmabuf dma buf pointer to search for
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* @param addr dma_addr_t pointer to return
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* @return 0 on success or negative on error
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*
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*/
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int nvpva_get_iova_addr(struct nvpva_buffers *nvpva_buffers,
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struct dma_buf *dmabuf, dma_addr_t *addr);
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#endif /*__NVPVA_NVPVA_BUFFER_H__ */
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