ec23ff584a
Improve debugging infrastructure and logging for memory related issues. There are scenarios where the fd returned after ion_alloc exists in camera smmu table as being mapped [stale entry]. On such scenarios, this change will return a specific error code to userspace. The change also propagates the mapped size back to user space. CRs-Fixed: 2663114 Change-Id: Ia797b65d1e8ded58dec5b01df07d73262c4cfa95 Signed-off-by: Karthik Anantha Ram <kartanan@codeaurora.org>
135 righe
3.2 KiB
C
135 righe
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2016-2020, The Linux Foundation. All rights reserved.
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*/
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#ifndef _CAM_MEM_MGR_H_
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#define _CAM_MEM_MGR_H_
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#include <linux/mutex.h>
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#include <linux/dma-buf.h>
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#include <media/cam_req_mgr.h>
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#include "cam_mem_mgr_api.h"
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#define CAM_MEM_BUFQ_MAX 1024
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/* Enum for possible mem mgr states */
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enum cam_mem_mgr_state {
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CAM_MEM_MGR_UNINITIALIZED,
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CAM_MEM_MGR_INITIALIZED,
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};
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/*Enum for possible SMMU operations */
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enum cam_smmu_mapping_client {
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CAM_SMMU_MAPPING_USER,
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CAM_SMMU_MAPPING_KERNEL,
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};
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/**
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* struct cam_mem_buf_queue
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*
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* @dma_buf: pointer to the allocated dma_buf in the table
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* @q_lock: mutex lock for buffer
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* @hdls: list of mapped handles
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* @num_hdl: number of handles
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* @fd: file descriptor of buffer
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* @buf_handle: unique handle for buffer
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* @align: alignment for allocation
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* @len: size of buffer
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* @flags: attributes of buffer
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* @vaddr: IOVA of buffer
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* @kmdvaddr: Kernel virtual address
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* @active: state of the buffer
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* @is_imported: Flag indicating if buffer is imported from an FD in user space
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* @is_internal: Flag indicating kernel allocated buffer
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* @timestamp: Timestamp at which this entry in tbl was made
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*/
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struct cam_mem_buf_queue {
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struct dma_buf *dma_buf;
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struct mutex q_lock;
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int32_t hdls[CAM_MEM_MMU_MAX_HANDLE];
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int32_t num_hdl;
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int32_t fd;
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int32_t buf_handle;
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int32_t align;
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size_t len;
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uint32_t flags;
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uint64_t vaddr;
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uintptr_t kmdvaddr;
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bool active;
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bool is_imported;
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bool is_internal;
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struct timespec64 timestamp;
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};
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/**
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* struct cam_mem_table
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*
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* @m_lock: mutex lock for table
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* @bitmap: bitmap of the mem mgr utility
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* @bits: max bits of the utility
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* @bufq: array of buffers
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* @dentry: Debugfs entry
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* @alloc_profile_enable: Whether to enable alloc profiling
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*/
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struct cam_mem_table {
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struct mutex m_lock;
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void *bitmap;
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size_t bits;
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struct cam_mem_buf_queue bufq[CAM_MEM_BUFQ_MAX];
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struct dentry *dentry;
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bool alloc_profile_enable;
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};
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/**
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* @brief: Allocates and maps buffer
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*
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* @cmd: Allocation information
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*
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* @return Status of operation. Negative in case of error. Zero otherwise.
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*/
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int cam_mem_mgr_alloc_and_map(struct cam_mem_mgr_alloc_cmd *cmd);
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/**
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* @brief: Releases a buffer reference
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*
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* @cmd: Buffer release information
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*
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* @return Status of operation. Negative in case of error. Zero otherwise.
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*/
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int cam_mem_mgr_release(struct cam_mem_mgr_release_cmd *cmd);
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/**
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* @brief Maps a buffer
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*
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* @cmd: Buffer mapping information
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*
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* @return Status of operation. Negative in case of error. Zero otherwise.
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*/
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int cam_mem_mgr_map(struct cam_mem_mgr_map_cmd *cmd);
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/**
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* @brief: Perform cache ops on the buffer
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*
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* @cmd: Cache ops information
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*
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* @return Status of operation. Negative in case of error. Zero otherwise.
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*/
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int cam_mem_mgr_cache_ops(struct cam_mem_cache_ops_cmd *cmd);
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/**
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* @brief: Initializes the memory manager
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*
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* @return Status of operation. Negative in case of error. Zero otherwise.
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*/
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int cam_mem_mgr_init(void);
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/**
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* @brief: Tears down the memory manager
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*
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* @return None
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*/
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void cam_mem_mgr_deinit(void);
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#endif /* _CAM_MEM_MGR_H_ */
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