Commit 2eab5efe authored by Suman Anna's avatar Suman Anna Committed by Bjorn Andersson
Browse files

remoteproc: k3-dsp: Refactor mbox request code in start 



Refactor out the mailbox request and associated ping logic code
from k3_dsp_rproc_start() function into its own separate function
so that it can be re-used in the soon to be added .attach() ops
callback.

Signed-off-by: default avatarSuman Anna <s-anna@ti.com>
Reviewed-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220213201246.25952-5-s-anna@ti.com
parent 1168af40

drivers/remoteproc/ti_k3_dsp_remoteproc.c

+40 −27
Original line number Diff line number Diff line
@@ -2,7 +2,7 @@ 
/*

 * TI K3 DSP Remote Processor(s) driver

 *

 * Copyright (C) 2018-2020 Texas Instruments Incorporated - https://www.ti.com/

 * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/

 *	Suman Anna <s-anna@ti.com>

 */
@@ -216,6 +216,43 @@ static int k3_dsp_rproc_release(struct k3_dsp_rproc *kproc) 
	return ret;

}



static int k3_dsp_rproc_request_mbox(struct rproc *rproc)

{

	struct k3_dsp_rproc *kproc = rproc->priv;

	struct mbox_client *client = &kproc->client;

	struct device *dev = kproc->dev;

	int ret;



	client->dev = dev;

	client->tx_done = NULL;

	client->rx_callback = k3_dsp_rproc_mbox_callback;

	client->tx_block = false;

	client->knows_txdone = false;



	kproc->mbox = mbox_request_channel(client, 0);

	if (IS_ERR(kproc->mbox)) {

		ret = -EBUSY;

		dev_err(dev, "mbox_request_channel failed: %ld\n",

			PTR_ERR(kproc->mbox));

		return ret;

	}



	/*

	 * Ping the remote processor, this is only for sanity-sake for now;

	 * there is no functional effect whatsoever.

	 *

	 * Note that the reply will _not_ arrive immediately: this message

	 * will wait in the mailbox fifo until the remote processor is booted.

	 */

	ret = mbox_send_message(kproc->mbox, (void *)RP_MBOX_ECHO_REQUEST);

	if (ret < 0) {

		dev_err(dev, "mbox_send_message failed: %d\n", ret);

		mbox_free_channel(kproc->mbox);

		return ret;

	}



	return 0;

}

/*

 * The C66x DSP cores have a local reset that affects only the CPU, and a

 * generic module reset that powers on the device and allows the DSP internal
@@ -273,37 +310,13 @@ static int k3_dsp_rproc_unprepare(struct rproc *rproc) 
static int k3_dsp_rproc_start(struct rproc *rproc)

{

	struct k3_dsp_rproc *kproc = rproc->priv;

	struct mbox_client *client = &kproc->client;

	struct device *dev = kproc->dev;

	u32 boot_addr;

	int ret;



	client->dev = dev;

	client->tx_done = NULL;

	client->rx_callback = k3_dsp_rproc_mbox_callback;

	client->tx_block = false;

	client->knows_txdone = false;



	kproc->mbox = mbox_request_channel(client, 0);

	if (IS_ERR(kproc->mbox)) {

		ret = -EBUSY;

		dev_err(dev, "mbox_request_channel failed: %ld\n",

			PTR_ERR(kproc->mbox));

	ret = k3_dsp_rproc_request_mbox(rproc);

	if (ret)

		return ret;

	}



	/*

	 * Ping the remote processor, this is only for sanity-sake for now;

	 * there is no functional effect whatsoever.

	 *

	 * Note that the reply will _not_ arrive immediately: this message

	 * will wait in the mailbox fifo until the remote processor is booted.

	 */

	ret = mbox_send_message(kproc->mbox, (void *)RP_MBOX_ECHO_REQUEST);

	if (ret < 0) {

		dev_err(dev, "mbox_send_message failed: %d\n", ret);

		goto put_mbox;

	}



	boot_addr = rproc->bootaddr;

	if (boot_addr & (kproc->data->boot_align_addr - 1)) {