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

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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: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20220405172708.122168-2-ranjani.sridharan@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Peter Ujfalusi 2022-04-05 10:26:54 -07:00 committed by Mark Brown
parent 239556a343
commit b4dcafe45e
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 55 additions and 0 deletions
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53
sound/soc/sof/ipc.c
View File

@ -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)

2
sound/soc/sof/sof-priv.h
View File

@ -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)
{