sound/soc/intel/catpt/messages.c

Source file repositories/reference/linux-study-clean/sound/soc/intel/catpt/messages.c

File Facts

System
Linux kernel
Corpus path
sound/soc/intel/catpt/messages.c
Extension
.c
Size
6832 bytes
Lines
249
Domain
Driver Families
Bucket
sound/soc
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct catpt_alloc_stream_input {
	enum catpt_path_id path_id:8;
	enum catpt_stream_type stream_type:8;
	enum catpt_format_id format_id:8;
	u8 reserved;
	struct catpt_audio_format input_format;
	struct catpt_ring_info ring_info;
	u8 num_entries;
	/* flex array with entries here */
	struct catpt_memory_info persistent_mem;
	struct catpt_memory_info scratch_mem;
	u32 num_notifications; /* obsolete */
} __packed;

int catpt_ipc_alloc_stream(struct catpt_dev *cdev,
			   enum catpt_path_id path_id,
			   enum catpt_stream_type type,
			   struct catpt_audio_format *afmt,
			   struct catpt_ring_info *rinfo,
			   u8 num_modules,
			   struct catpt_module_entry *modules,
			   struct resource *persistent,
			   struct resource *scratch,
			   struct catpt_stream_info *sinfo)
{
	union catpt_global_msg msg = CATPT_GLOBAL_MSG(ALLOCATE_STREAM);
	struct catpt_alloc_stream_input input;
	struct catpt_ipc_msg request, reply;
	size_t size, arrsz;
	u8 *payload;
	off_t off;
	int ret;

	off = offsetof(struct catpt_alloc_stream_input, persistent_mem);
	arrsz = sizeof(*modules) * num_modules;
	size = sizeof(input) + arrsz;

	payload = kzalloc(size, GFP_KERNEL);
	if (!payload)
		return -ENOMEM;

	memset(&input, 0, sizeof(input));
	input.path_id = path_id;
	input.stream_type = type;
	input.format_id = CATPT_FORMAT_PCM;
	input.input_format = *afmt;
	input.ring_info = *rinfo;
	input.num_entries = num_modules;
	input.persistent_mem.offset = catpt_to_dsp_offset(persistent->start);
	input.persistent_mem.size = resource_size(persistent);
	if (scratch) {
		input.scratch_mem.offset = catpt_to_dsp_offset(scratch->start);
		input.scratch_mem.size = resource_size(scratch);
	}

	/* re-arrange the input: account for flex array 'entries' */
	memcpy(payload, &input, sizeof(input));
	memmove(payload + off + arrsz, payload + off, sizeof(input) - off);
	memcpy(payload + off, modules, arrsz);

	request.header = msg.val;
	request.size = size;
	request.data = payload;
	reply.size = sizeof(*sinfo);
	reply.data = sinfo;

	ret = catpt_dsp_send_msg(cdev, request, &reply, "alloc stream");
	kfree(payload);
	return ret;
}

int catpt_ipc_free_stream(struct catpt_dev *cdev, u8 stream_hw_id)
{
	union catpt_global_msg msg = CATPT_GLOBAL_MSG(FREE_STREAM);
	struct catpt_ipc_msg request;

	request.header = msg.val;
	request.size = sizeof(stream_hw_id);
	request.data = &stream_hw_id;

	return catpt_dsp_send_msg(cdev, request, NULL, "free stream");
}

int catpt_ipc_set_device_format(struct catpt_dev *cdev,
				struct catpt_ssp_device_format *devfmt)
{
	union catpt_global_msg msg = CATPT_GLOBAL_MSG(SET_DEVICE_FORMATS);
	struct catpt_ipc_msg request;

	request.header = msg.val;

Annotation

Implementation Notes