This is temporary patch. The dma-contig changes were significant
and the difference patch would be very difficult to read.
Signed-off-by: Tomasz Stanislawski <t.stanislaws@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
drivers/media/video/videobuf2-dma-contig.c | 308 ----------------------------
1 files changed, 0 insertions(+), 308 deletions(-)
delete mode 100644 drivers/media/video/videobuf2-dma-contig.c
diff --git a/drivers/media/video/videobuf2-dma-contig.c b/drivers/media/video/videobuf2-dma-contig.c
deleted file mode 100644
index ea2699f..0000000
--- a/drivers/media/video/videobuf2-dma-contig.c
+++ /dev/null
@@ -1,308 +0,0 @@
-/*
- * videobuf2-dma-contig.c - DMA contig memory allocator for videobuf2
- *
- * Copyright (C) 2010 Samsung Electronics
- *
- * Author: Pawel Osciak <pawel@xxxxxxxxxx>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation.
- */
-
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/dma-mapping.h>
-#include <linux/scatterlist.h>
-#include <linux/dma-buf.h>
-
-#include <media/videobuf2-core.h>
-#include <media/videobuf2-memops.h>
-
-struct vb2_dc_conf {
- struct device *dev;
-};
-
-struct vb2_dc_buf {
- struct vb2_dc_conf *conf;
- void *vaddr;
- dma_addr_t dma_addr;
- unsigned long size;
- struct vm_area_struct *vma;
- struct dma_buf_attachment *db_attach;
- atomic_t refcount;
- struct vb2_vmarea_handler handler;
-};
-
-static void vb2_dma_contig_put(void *buf_priv);
-
-static void *vb2_dma_contig_alloc(void *alloc_ctx, unsigned long size)
-{
- struct vb2_dc_conf *conf = alloc_ctx;
- struct vb2_dc_buf *buf;
- /* TODO: add db_attach processing while adding DMABUF as exporter */
-
- buf = kzalloc(sizeof *buf, GFP_KERNEL);
- if (!buf)
- return ERR_PTR(-ENOMEM);
-
- buf->vaddr = dma_alloc_coherent(conf->dev, size, &buf->dma_addr,
- GFP_KERNEL);
- if (!buf->vaddr) {
- dev_err(conf->dev, "dma_alloc_coherent of size %ld failed\n",
- size);
- kfree(buf);
- return ERR_PTR(-ENOMEM);
- }
-
- buf->conf = conf;
- buf->size = size;
-
- buf->handler.refcount = &buf->refcount;
- buf->handler.put = vb2_dma_contig_put;
- buf->handler.arg = buf;
-
- atomic_inc(&buf->refcount);
-
- return buf;
-}
-
-static void vb2_dma_contig_put(void *buf_priv)
-{
- struct vb2_dc_buf *buf = buf_priv;
-
- if (atomic_dec_and_test(&buf->refcount)) {
- dma_free_coherent(buf->conf->dev, buf->size, buf->vaddr,
- buf->dma_addr);
- kfree(buf);
- }
-}
-
-static void *vb2_dma_contig_cookie(void *buf_priv)
-{
- struct vb2_dc_buf *buf = buf_priv;
-
- return &buf->dma_addr;
-}
-
-static void *vb2_dma_contig_vaddr(void *buf_priv)
-{
- struct vb2_dc_buf *buf = buf_priv;
- if (!buf)
- return 0;
-
- return buf->vaddr;
-}
-
-static unsigned int vb2_dma_contig_num_users(void *buf_priv)
-{
- struct vb2_dc_buf *buf = buf_priv;
-
- return atomic_read(&buf->refcount);
-}
-
-static int vb2_dma_contig_mmap(void *buf_priv, struct vm_area_struct *vma)
-{
- struct vb2_dc_buf *buf = buf_priv;
-
- if (!buf) {
- printk(KERN_ERR "No buffer to map\n");
- return -EINVAL;
- }
-
- return vb2_mmap_pfn_range(vma, buf->dma_addr, buf->size,
- &vb2_common_vm_ops, &buf->handler);
-}
-
-static void *vb2_dma_contig_get_userptr(void *alloc_ctx, unsigned long vaddr,
- unsigned long size, int write)
-{
- struct vb2_dc_buf *buf;
- struct vm_area_struct *vma;
- dma_addr_t dma_addr = 0;
- int ret;
-
- buf = kzalloc(sizeof *buf, GFP_KERNEL);
- if (!buf)
- return ERR_PTR(-ENOMEM);
-
- ret = vb2_get_contig_userptr(vaddr, size, &vma, &dma_addr);
- if (ret) {
- printk(KERN_ERR "Failed acquiring VMA for vaddr 0x%08lx\n",
- vaddr);
- kfree(buf);
- return ERR_PTR(ret);
- }
-
- buf->size = size;
- buf->dma_addr = dma_addr;
- buf->vma = vma;
-
- return buf;
-}
-
-static void vb2_dma_contig_put_userptr(void *mem_priv)
-{
- struct vb2_dc_buf *buf = mem_priv;
-
- if (!buf)
- return;
-
- vb2_put_vma(buf->vma);
- kfree(buf);
-}
-
-static int vb2_dma_contig_map_dmabuf(void *mem_priv,
- enum dma_data_direction direction)
-{
- struct vb2_dc_buf *buf = mem_priv;
- struct dma_buf *dmabuf;
- struct sg_table *sg;
-
- if (!buf || !buf->db_attach) {
- printk(KERN_ERR "No dma buffer to pin\n");
- return -EINVAL;
- }
-
- WARN_ON(buf->dma_addr);
-
- if (direction == DMA_NONE) {
- printk(KERN_ERR "Incorrect DMA direction\n");
- return -EINVAL;
- }
-
- dmabuf = buf->db_attach->dmabuf;
-
- /* get the associated scatterlist for this buffer */
- sg = dma_buf_map_attachment(buf->db_attach, direction);
-
- if (!sg) {
- printk(KERN_ERR "Error getting dmabuf scatterlist\n");
- return -EINVAL;
- }
-
- /*
- * convert sglist to paddr:
- * Assumption: for dma-contig, dmabuf would map to single entry
- * Will return an error if it has more than one.
- */
- if (sg->nents > 1) {
- printk(KERN_ERR
- "dmabuf scatterlist has more than 1 entry\n");
- return -EINVAL;
- }
-
- buf->dma_addr = sg_dma_address(sg->sgl);
- /* TODO: check the buffer size as per S_FMT */
- buf->size = sg_dma_len(sg->sgl);
-
- /* save this scatterlist in dmabuf for put_scatterlist */
- dmabuf->priv = sg;
-
- return 0;
-}
-
-static void vb2_dma_contig_unmap_dmabuf(void *mem_priv)
-{
- struct vb2_dc_buf *buf = mem_priv;
- struct dma_buf *dmabuf;
- struct sg_table *sg;
-
- if (!buf || !buf->db_attach)
- return;
-
- WARN_ON(!buf->dma_addr);
-
- dmabuf = buf->db_attach->dmabuf;
- sg = dmabuf->priv;
-
- /* Put the sg for this buffer */
- dma_buf_unmap_attachment(buf->db_attach, sg);
-
- buf->dma_addr = 0;
- buf->size = 0;
-}
-
-static void *vb2_dma_contig_attach_dmabuf(void *alloc_ctx, struct dma_buf *dbuf)
-{
- struct vb2_dc_conf *conf = alloc_ctx;
- struct vb2_dc_buf *buf;
- struct dma_buf_attachment *dba;
-
- buf = kzalloc(sizeof *buf, GFP_KERNEL);
- if (!buf)
- return ERR_PTR(-ENOMEM);
-
- /* create attachment for the dmabuf with the user device */
- dba = dma_buf_attach(dbuf, conf->dev);
- if (IS_ERR(dba)) {
- printk(KERN_ERR "failed to attach dmabuf\n");
- kfree(buf);
- return dba;
- }
-
- buf->conf = conf;
- buf->size = dba->dmabuf->size;
- buf->db_attach = dba;
- buf->dma_addr = 0; /* dma_addr is available only after map */
-
- return buf;
-}
-
-static void vb2_dma_contig_detach_dmabuf(void *mem_priv)
-{
- struct vb2_dc_buf *buf = mem_priv;
-
- if (!buf)
- return;
-
- if (buf->dma_addr) {
- vb2_dma_contig_unmap_dmabuf(buf);
- }
-
- /* detach this attachment */
- dma_buf_detach(buf->db_attach->dmabuf, buf->db_attach);
- buf->db_attach = NULL;
-
- kfree(buf);
-}
-
-const struct vb2_mem_ops vb2_dma_contig_memops = {
- .alloc = vb2_dma_contig_alloc,
- .put = vb2_dma_contig_put,
- .cookie = vb2_dma_contig_cookie,
- .vaddr = vb2_dma_contig_vaddr,
- .mmap = vb2_dma_contig_mmap,
- .get_userptr = vb2_dma_contig_get_userptr,
- .put_userptr = vb2_dma_contig_put_userptr,
- .map_dmabuf = vb2_dma_contig_map_dmabuf,
- .unmap_dmabuf = vb2_dma_contig_unmap_dmabuf,
- .attach_dmabuf = vb2_dma_contig_attach_dmabuf,
- .detach_dmabuf = vb2_dma_contig_detach_dmabuf,
- .num_users = vb2_dma_contig_num_users,
-};
-EXPORT_SYMBOL_GPL(vb2_dma_contig_memops);
-
-void *vb2_dma_contig_init_ctx(struct device *dev)
-{
- struct vb2_dc_conf *conf;
-
- conf = kzalloc(sizeof *conf, GFP_KERNEL);
- if (!conf)
- return ERR_PTR(-ENOMEM);
-
- conf->dev = dev;
-
- return conf;
-}
-EXPORT_SYMBOL_GPL(vb2_dma_contig_init_ctx);
-
-void vb2_dma_contig_cleanup_ctx(void *alloc_ctx)
-{
- kfree(alloc_ctx);
-}
-EXPORT_SYMBOL_GPL(vb2_dma_contig_cleanup_ctx);
-
-MODULE_DESCRIPTION("DMA-contig memory handling routines for videobuf2");
-MODULE_AUTHOR("Pawel Osciak <pawel@xxxxxxxxxx>");
-MODULE_LICENSE("GPL");
--
1.7.5.4
--
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