drivers/dma/dma-api.c

26 	struct dma_info *info;
32 	list_for_each_entry(info, &registered_dmac_list, list) {
33 		if ((chan <  info->first_vchannel_nr) ||
34 		    (chan >= info->first_vchannel_nr + info->nr_channels))
37 		return info;
46 	struct dma_info *info;
52 	list_for_each_entry(info, &registered_dmac_list, list)
53 		nr += info->nr_channels;
60 	struct dma_info *info = get_dma_info(chan);
64 	if (unlikely(!info))
67 	for (i = 0; i < info->nr_channels; i++) {
68 		channel = &info->channels[i];
79 	struct dma_info *info = get_dma_info(chan);
82 	if (info->ops->get_residue)
83 		return info->ops->get_residue(channel);
92 	struct dma_info *info = get_dma_info(chan);
101 	if (info->ops->request) {
102 		result = info->ops->request(channel);
115 	struct dma_info *info = get_dma_info(chan);
118 	if (info->ops->free)
119 		info->ops->free(channel);
127 	struct dma_info *info = get_dma_info(chan);
132 			   (info->ops->get_residue(channel) == 0));
136 	while (info->ops->get_residue(channel))
143 	struct dma_info *info = get_dma_info(chan);
146 	if (info->ops->configure)
147 		info->ops->configure(channel, flags);
154 	struct dma_info *info = get_dma_info(chan);
162 	return info->ops->xfer(channel);
168 	struct dma_info *info = v;
176 	list_for_each_entry(info, &registered_dmac_list, list) {
182 		for (i = 0; i < info->nr_channels; i++) {
183 			struct dma_channel *channel = info->channels + i;
189 				   info->name, channel->dev_id);
196 int register_dmac(struct dma_info *info)
200 	INIT_LIST_HEAD(&info->list);
203 	       info->name, info->nr_channels, info->nr_channels > 1 ? "s" : "");
205 	BUG_ON((info->flags & DMAC_CHANNELS_CONFIGURED) && !info->channels);
207 	info->pdev = platform_device_register_simple(info->name, -1,
209 	if (IS_ERR(info->pdev))
210 		return PTR_ERR(info->pdev);
215 	if (!(info->flags & DMAC_CHANNELS_CONFIGURED)) {
218 		size = sizeof(struct dma_channel) * info->nr_channels;
220 		info->channels = kzalloc(size, GFP_KERNEL);
221 		if (!info->channels)
226 	info->first_vchannel_nr = total_channels;
227 	for (i = 0; i < info->nr_channels; i++) {
228 		struct dma_channel *chan = &info->channels[i];
232 		chan->chan  = info->first_channel_nr + i;
233 		chan->vchan = info->first_channel_nr + i + total_channels;
237 		if (info->flags & DMAC_CHANNELS_TEI_CAPABLE)
241 		dma_create_sysfs_files(chan, info);
244 	list_add(&info->list, &registered_dmac_list);
250 void unregister_dmac(struct dma_info *info)
254 	for (i = 0; i < info->nr_channels; i++)
255 		dma_remove_sysfs_files(info->channels + i, info);
257 	if (!(info->flags & DMAC_CHANNELS_CONFIGURED))
258 		kfree(info->channels);
260 	list_del(&info->list);
261 	platform_device_unregister(info->pdev);