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83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
/*
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* Broadcom PCIe 1570 webcam driver
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*
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* Copyright (C) 2014 Patrik Jakobsson (patrik.r.jakobsson@gmail.com)
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation.
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*
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*/
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#ifndef FTHD_BUFFER_H
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#define FTHD_BUFFER_H
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#include <linux/scatterlist.h>
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#include "fthd_buffer.h"
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enum fthd_buffer_state {
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BUF_FREE,
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BUF_ALLOC,
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BUF_DRV_QUEUED,
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BUF_HW_QUEUED,
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};
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struct dma_descriptor {
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u32 addr0;
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u32 addr1;
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u32 addr2;
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u32 field_c;
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u32 field_10;
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u32 field_14;
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u32 count;
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u32 pool;
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u64 tag;
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} __attribute__((packed));
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struct dma_descriptor_list {
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u32 field0;
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u32 count;
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struct dma_descriptor desc[4];
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} __attribute__((packed));
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struct iommu_obj {
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struct resource base;
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int size;
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int offset;
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};
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struct fthd_plane {
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u8 *virt;
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u64 phys;
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dma_addr_t dma;
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int len;
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struct iommu_obj *iommu;
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};
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struct h2t_buf_ctx {
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enum fthd_buffer_state state;
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struct vb2_buffer *vb;
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struct iommu_obj *plane[4];
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struct isp_mem_obj *dma_desc_obj;
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struct dma_descriptor_list *dma_desc_list;
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/* waitqueue for signaling buffer completion */
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wait_queue_head_t wq;
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int done;
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};
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extern int setup_buffers(struct fthd_private *dev_priv);
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extern int fthd_buffer_init(struct fthd_private *dev_priv);
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extern void fthd_buffer_exit(struct fthd_private *dev_priv);
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extern void fthd_buffer_return_handler(struct fthd_private *dev_priv, struct dma_descriptor_list *list, int size);
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extern void fthd_buffer_queued_handler(struct fthd_private *dev_priv, struct dma_descriptor_list *list);
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extern struct iommu_obj *iommu_allocate_sgtable(struct fthd_private *dev_priv, struct sg_table *);
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extern void iommu_free(struct fthd_private *dev_priv, struct iommu_obj *obj);
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#endif
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