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

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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: Suman Anna <s-anna@ti.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220213201246.25952-5-s-anna@ti.com
This commit is contained in:
Suman Anna 2022-02-13 14:12:45 -06:00 committed by Bjorn Andersson
parent 1168af40b1
commit 2eab5efeb4
1 changed files with 40 additions and 27 deletions
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67
drivers/remoteproc/ti_k3_dsp_remoteproc.c
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@ -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)) {