4  * SPDX-License-Identifier: Apache-2.0
29  * a generic software-based DMA engine implementation.
45 	uint32_t direction;  member
59 	enum channel_state prev = chan->state;  in channel_change_state()
66 			return -EPERM;  in channel_change_state()
71 		return -EINVAL;  in channel_change_state()
74 	chan->state = next;  in channel_change_state()
90 	data = dev->data;  in sof_host_dma_reload()
92 	if (chan_id >= data->ctx.dma_channels) {  in sof_host_dma_reload()
94 		return -EINVAL;  in sof_host_dma_reload()
98 	chan = &data->channels[chan_id];  in sof_host_dma_reload()
101 	if (chan->state != CHAN_STATE_CONFIGURED) {  in sof_host_dma_reload()
103 		return -EINVAL;  in sof_host_dma_reload()
106 	if (chan->direction == HOST_TO_MEMORY) {  in sof_host_dma_reload()
111 		ret = sys_cache_data_invd_range(UINT_TO_POINTER(chan->src),  in sof_host_dma_reload()
112 						chan->size);  in sof_host_dma_reload()
119 	memcpy(UINT_TO_POINTER(chan->dest), UINT_TO_POINTER(chan->src), chan->size);  in sof_host_dma_reload()
152 	ret = sys_cache_data_flush_range(UINT_TO_POINTER(chan->dest), chan->size);  in sof_host_dma_reload()
169 	data = dev->data;  in sof_host_dma_config()
171 	if (chan_id >= data->ctx.dma_channels) {  in sof_host_dma_config()
173 		return -EINVAL;  in sof_host_dma_config()
177 	chan = &data->channels[chan_id];  in sof_host_dma_config()
187 	if (config->block_count != 1) {  in sof_host_dma_config()
188 		LOG_ERR("invalid number of blocks: %d", config->block_count);  in sof_host_dma_config()
189 		return -EINVAL;  in sof_host_dma_config()
192 	if (!config->head_block->source_address) {  in sof_host_dma_config()
194 		return -EINVAL;  in sof_host_dma_config()
197 	if (!config->head_block->dest_address) {  in sof_host_dma_config()
199 		return -EINVAL;  in sof_host_dma_config()
202 	if (!config->head_block->block_size) {  in sof_host_dma_config()
204 		return -EINVAL;  in sof_host_dma_config()
208 	if (config->channel_direction != HOST_TO_MEMORY &&  in sof_host_dma_config()
209 	    config->channel_direction != MEMORY_TO_HOST) {  in sof_host_dma_config()
210 		LOG_ERR("invalid channel direction: %d",  in sof_host_dma_config()
211 			config->channel_direction);  in sof_host_dma_config()
212 		return -EINVAL;  in sof_host_dma_config()
216 	chan->src = config->head_block->source_address;  in sof_host_dma_config()
217 	chan->dest = config->head_block->dest_address;  in sof_host_dma_config()
218 	chan->size = config->head_block->block_size;  in sof_host_dma_config()
219 	chan->direction = config->channel_direction;  in sof_host_dma_config()
222 		chan_id, chan->src, chan->dest, chan->size);  in sof_host_dma_config()
268 		return -EINVAL;  in sof_host_dma_get_attribute()
287 	struct sof_host_dma_data *data = dev->data;  in sof_host_dma_init()
289 	data->channel_flags = ATOMIC_INIT(0);  in sof_host_dma_init()
290 	data->ctx.atomic = &data->channel_flags;  in sof_host_dma_init()