10 // Generic IPC layer that can work over MMIO and SPI/I2C. PHY layer provided
25  * IPC message Tx/Rx message handling.
28 /* SOF generic IPC data */
34 	/* disables further sending of ipc's */
216 /* wait for IPC message reply */
217 static int tx_wait_done(struct snd_sof_ipc *ipc, struct snd_sof_ipc_msg *msg,  in tx_wait_done()  argument
220 	struct snd_sof_dev *sdev = ipc->sdev;  in tx_wait_done()
224 	/* wait for DSP IPC completion */  in tx_wait_done()
229 		dev_err(sdev->dev, "error: ipc timed out for 0x%x size %d\n",  in tx_wait_done()
231 		snd_sof_handle_fw_exception(ipc->sdev);  in tx_wait_done()
236 			dev_err(sdev->dev, "error: ipc error for 0x%x size %zu\n",  in tx_wait_done()
239 			ipc_log_header(sdev->dev, "ipc tx succeeded", hdr->cmd);  in tx_wait_done()
250 /* send IPC message from host to DSP */
251 static int sof_ipc_tx_message_unlocked(struct snd_sof_ipc *ipc, u32 header,  in sof_ipc_tx_message_unlocked()  argument
255 	struct snd_sof_dev *sdev = ipc->sdev;  in sof_ipc_tx_message_unlocked()
259 	if (ipc->disable_ipc_tx)  in sof_ipc_tx_message_unlocked()
269 	msg = &ipc->msg;  in sof_ipc_tx_message_unlocked()
291 				    "error: ipc tx failed with error %d\n",  in sof_ipc_tx_message_unlocked()
296 	ipc_log_header(sdev->dev, "ipc tx", msg->header);  in sof_ipc_tx_message_unlocked()
300 		ret = tx_wait_done(ipc, msg, reply_data);  in sof_ipc_tx_message_unlocked()
305 /* send IPC message from host to DSP */
306 int sof_ipc_tx_message(struct snd_sof_ipc *ipc, u32 header,  in sof_ipc_tx_message()  argument
315 	/* ensure the DSP is in D0 before sending a new IPC */  in sof_ipc_tx_message()
316 	ret = snd_sof_dsp_set_power_state(ipc->sdev, &target_state);  in sof_ipc_tx_message()
318 		dev_err(ipc->sdev->dev, "error: resuming DSP %d\n", ret);  in sof_ipc_tx_message()
322 	return sof_ipc_tx_message_no_pm(ipc, header, msg_data, msg_bytes,  in sof_ipc_tx_message()
328  * send IPC message from host to DSP without modifying the DSP state.
329  * This will be used for IPC's that can be handled by the DSP
332 int sof_ipc_tx_message_no_pm(struct snd_sof_ipc *ipc, u32 header,  in sof_ipc_tx_message_no_pm()  argument
342 	/* Serialise IPC TX */  in sof_ipc_tx_message_no_pm()
343 	mutex_lock(&ipc->tx_mutex);  in sof_ipc_tx_message_no_pm()
345 	ret = sof_ipc_tx_message_unlocked(ipc, header, msg_data, msg_bytes,  in sof_ipc_tx_message_no_pm()
348 	mutex_unlock(&ipc->tx_mutex);  in sof_ipc_tx_message_no_pm()
357 	struct snd_sof_ipc_msg *msg = &sdev->ipc->msg;  in snd_sof_ipc_reply()
381 	ipc_log_header(sdev->dev, "ipc rx", hdr.cmd);  in snd_sof_ipc_msgs_rx()
389 		dev_err(sdev->dev, "error: ipc reply unknown\n");  in snd_sof_ipc_msgs_rx()
421 	ipc_log_header(sdev->dev, "ipc rx done", hdr.cmd);  in snd_sof_ipc_msgs_rx()
426  * IPC trace mechanism.
447  * IPC stream position.
529 /* get stream position IPC - use faster MMIO method if available on platform */
538 	/* read position via slower IPC */  in snd_sof_ipc_stream_posn()
543 	/* send IPC to the DSP */  in snd_sof_ipc_stream_posn()
544 	err = sof_ipc_tx_message(sdev->ipc,  in snd_sof_ipc_stream_posn()
602 	/* allocate max ipc size because we have at least one */  in sof_set_get_large_ctrl_data()
624 	/* Serialise IPC TX */  in sof_set_get_large_ctrl_data()
625 	mutex_lock(&sdev->ipc->tx_mutex);  in sof_set_get_large_ctrl_data()
639 		err = sof_ipc_tx_message_unlocked(sdev->ipc,  in sof_set_get_large_ctrl_data()
654 	mutex_unlock(&sdev->ipc->tx_mutex);  in sof_set_get_large_ctrl_data()
661  * IPC get()/set() for kcontrols.
732 	/* send normal size ipc in one part */  in snd_sof_ipc_set_get_comp_data()
734 		err = sof_ipc_tx_message(sdev->ipc, cdata->rhdr.hdr.cmd, cdata,  in snd_sof_ipc_set_get_comp_data()
739 			dev_err(sdev->dev, "error: set/get ctrl ipc comp %d\n",  in snd_sof_ipc_set_get_comp_data()
745 	/* data is bigger than max ipc size, chop into smaller pieces */  in snd_sof_ipc_set_get_comp_data()
746 	dev_dbg(sdev->dev, "large ipc size %u, control size %u\n",  in snd_sof_ipc_set_get_comp_data()
758 		dev_err(sdev->dev, "error: set/get large ctrl ipc comp %d\n",  in snd_sof_ipc_set_get_comp_data()
766  * IPC layer enumeration.
834 	struct snd_sof_ipc *ipc;  in snd_sof_ipc_init()  local
837 	ipc = devm_kzalloc(sdev->dev, sizeof(*ipc), GFP_KERNEL);  in snd_sof_ipc_init()
838 	if (!ipc)  in snd_sof_ipc_init()
841 	mutex_init(&ipc->tx_mutex);  in snd_sof_ipc_init()
842 	ipc->sdev = sdev;  in snd_sof_ipc_init()
843 	msg = &ipc->msg;  in snd_sof_ipc_init()
861 	return ipc;  in snd_sof_ipc_init()
867 	struct snd_sof_ipc *ipc = sdev->ipc;  in snd_sof_ipc_free()  local
869 	if (!ipc)  in snd_sof_ipc_free()
872 	/* disable sending of ipc's */  in snd_sof_ipc_free()
873 	mutex_lock(&ipc->tx_mutex);  in snd_sof_ipc_free()
874 	ipc->disable_ipc_tx = true;  in snd_sof_ipc_free()
875 	mutex_unlock(&ipc->tx_mutex);  in snd_sof_ipc_free()