static int adf_buffer_map(struct adf_device *dev, struct adf_buffer *buf,
struct adf_buffer_mapping *mapping)
{
int ret = 0;
size_t i;
for (i = 0; i < buf->n_planes; i++) {
struct dma_buf_attachment *attachment;
struct sg_table *sg_table;
attachment = dma_buf_attach(buf->dma_bufs[i], dev->dev);
if (IS_ERR(attachment)) {
ret = PTR_ERR(attachment);
dev_err(&dev->base.dev, "attaching plane %zu failed: %d\n",
i, ret);
goto done;
}
mapping->attachments[i] = attachment;
sg_table = dma_buf_map_attachment(attachment, DMA_TO_DEVICE);
if (IS_ERR(sg_table)) {
ret = PTR_ERR(sg_table);
dev_err(&dev->base.dev, "mapping plane %zu failed: %d",
i, ret);
goto done;
} else if (!sg_table) {
ret = -ENOMEM;
dev_err(&dev->base.dev, "mapping plane %zu failed\n",
i);
goto done;
}
mapping->sg_tables[i] = sg_table;
}
done:
if (ret < 0) {
adf_buffer_mapping_cleanup(mapping, buf);
memset(mapping, 0, sizeof(*mapping));
}
return ret;
}
/**
* adf_device_post_nocopy - flip to a new set of buffers
*
* adf_device_post_nocopy() has the same behavior as adf_device_post(),
* except ADF does not copy @intfs, @bufs, or @custom_data, and it does
* not take an extra reference on the dma-bufs in @bufs.
*
* @intfs, @bufs, and @custom_data must point to buffers allocated by
* kmalloc(). On success, ADF takes ownership of these buffers and the dma-bufs
* in @bufs, and will kfree()/dma_buf_put() them when they are no longer needed.
* On failure, adf_device_post_nocopy() does NOT take ownership of these
* buffers or the dma-bufs, and the caller must clean them up.
*
* adf_device_post_nocopy() is mainly intended for implementing ADF's ioctls.
* Clients may find the nocopy variant useful in limited cases, but most should
* call adf_device_post() instead.
*/
struct sync_fence *adf_device_post_nocopy(struct adf_device *dev,
struct adf_interface **intfs, size_t n_intfs,
struct adf_buffer *bufs, size_t n_bufs,
void *custom_data, size_t custom_data_size)
{
struct adf_pending_post *cfg;
struct adf_buffer_mapping *mappings;
struct sync_fence *ret;
size_t i;
int err;
cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
if (!cfg)
return ERR_PTR(-ENOMEM);
mappings = kzalloc(sizeof(mappings[0]) * n_bufs, GFP_KERNEL);
if (!mappings) {
ret = ERR_PTR(-ENOMEM);
goto err_alloc;
}
mutex_lock(&dev->client_lock);
for (i = 0; i < n_bufs; i++) {
err = adf_buffer_validate(&bufs[i]);
if (err < 0) {
ret = ERR_PTR(err);
goto err_buf;
}
err = adf_buffer_map(dev, &bufs[i], &mappings[i]);
if (err < 0) {
ret = ERR_PTR(err);
goto err_buf;
}
}
INIT_LIST_HEAD(&cfg->head);
cfg->config.n_bufs = n_bufs;
cfg->config.bufs = bufs;
cfg->config.mappings = mappings;
cfg->config.custom_data = custom_data;
cfg->config.custom_data_size = custom_data_size;
err = dev->ops->validate(dev, &cfg->config, &cfg->state);
if (err < 0) {
ret = ERR_PTR(err);
goto err_buf;
}
mutex_lock(&dev->post_lock);
if (dev->ops->complete_fence)
ret = dev->ops->complete_fence(dev, &cfg->config,
cfg->state);
else
ret = adf_sw_complete_fence(dev);
if (IS_ERR(ret))
goto err_fence;
list_add_tail(&cfg->head, &dev->post_list);
queue_kthread_work(&dev->post_worker, &dev->post_work);
mutex_unlock(&dev->post_lock);
mutex_unlock(&dev->client_lock);
kfree(intfs);
return ret;
err_fence:
mutex_unlock(&dev->post_lock);
err_buf:
for (i = 0; i < n_bufs; i++)
adf_buffer_mapping_cleanup(&mappings[i], &bufs[i]);
mutex_unlock(&dev->client_lock);
kfree(mappings);
err_alloc:
kfree(cfg);
return ret;
}
