Unverified Commit b4dcafe4 authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Mark Brown
Browse files

ASoC: SOF: Add helper function to prepare and send an IPC message 



The new sof_ipc_send_msg() can be used by IPC dependent code to prepare
the ipc->msg for a new message transmission and then call in to platform
code to send the message.

Higher level code should be handling the completion and reply.

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: default avatarDaniel Baluta <daniel.baluta@nxp.com>
Reviewed-by: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: default avatarRanjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20220405172708.122168-2-ranjani.sridharan@linux.intel.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 239556a3

sound/soc/sof/ipc.c

+53 −0
Original line number Diff line number Diff line
@@ -340,6 +340,59 @@ static int sof_ipc_tx_message_unlocked(struct snd_sof_ipc *ipc, 
	return tx_wait_done(ipc, msg, reply_data);

}



/**

 * sof_ipc_send_msg - generic function to prepare and send one IPC message

 * @sdev:		pointer to SOF core device struct

 * @msg_data:		pointer to a message to send

 * @msg_bytes:		number of bytes in the message

 * @reply_bytes:	number of bytes available for the reply.

 *			The buffer for the reply data is not passed to this

 *			function, the available size is an information for the

 *			reply handling functions.

 *

 * On success the function returns 0, otherwise negative error number.

 *

 * Note: higher level sdev->ipc->tx_mutex must be held to make sure that

 *	 transfers are synchronized.

 */

int sof_ipc_send_msg(struct snd_sof_dev *sdev, void *msg_data, size_t msg_bytes,

		     size_t reply_bytes)

{

	struct snd_sof_ipc *ipc = sdev->ipc;

	struct snd_sof_ipc_msg *msg;

	int ret;



	if (ipc->disable_ipc_tx || sdev->fw_state != SOF_FW_BOOT_COMPLETE)

		return -ENODEV;



	/*

	 * The spin-lock is needed to protect message objects against other

	 * atomic contexts.

	 */

	spin_lock_irq(&sdev->ipc_lock);



	/* initialise the message */

	msg = &ipc->msg;



	/* attach message data */

	msg->msg_data = msg_data;

	msg->msg_size = msg_bytes;



	msg->reply_size = reply_bytes;

	msg->reply_error = 0;



	sdev->msg = msg;



	ret = snd_sof_dsp_send_msg(sdev, msg);

	/* Next reply that we receive will be related to this message */

	if (!ret)

		msg->ipc_complete = false;



	spin_unlock_irq(&sdev->ipc_lock);



	return ret;

}



/* send IPC message from host to DSP */

int sof_ipc_tx_message(struct snd_sof_ipc *ipc, void *msg_data, size_t msg_bytes,

		       void *reply_data, size_t reply_bytes)

sound/soc/sof/sof-priv.h

+2 −0
Original line number Diff line number Diff line
@@ -588,6 +588,8 @@ int sof_ipc_tx_message(struct snd_sof_ipc *ipc, void *msg_data, size_t msg_bytes 
		       void *reply_data, size_t reply_bytes);

int sof_ipc_tx_message_no_pm(struct snd_sof_ipc *ipc, void *msg_data, size_t msg_bytes,

			     void *reply_data, size_t reply_bytes);

int sof_ipc_send_msg(struct snd_sof_dev *sdev, void *msg_data, size_t msg_bytes,

		     size_t reply_bytes);

int sof_ipc_init_msg_memory(struct snd_sof_dev *sdev);

static inline void snd_sof_ipc_process_reply(struct snd_sof_dev *sdev, u32 msg_id)

{