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Message-ID: <20250103101231.1508151-9-b-padhi@ti.com>
Date: Fri, 3 Jan 2025 15:42:19 +0530
From: Beleswar Padhi <b-padhi@...com>
To: <andersson@...nel.org>, <mathieu.poirier@...aro.org>
CC: <afd@...com>, <hnagalla@...com>, <u-kumar1@...com>,
<p.zabel@...gutronix.de>, <jan.kiszka@...mens.com>,
<christophe.jaillet@...adoo.fr>, <jkangas@...hat.com>,
<eballetbo@...hat.com>, <b-padhi@...com>,
<linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v8 08/20] remoteproc: k3: Refactor rproc_request_mbox() implementations into common driver
The k3_dsp_rproc_request_mbox() function acquires the mailbox channel
and sends a message through the acquired channel. The
ti_k3_m4_remoteproc.c driver acquires the mailbox channel in probe and
sends the message later in .attach()/.start() callbacks. Refactor the
k3_dsp_rproc_request_mbox() function into ti_k3_common.c as
k3_rproc_request_mbox() and align DSP and M4 drivers to use this common
function during probe routine.
Signed-off-by: Beleswar Padhi <b-padhi@...com>
---
drivers/remoteproc/ti_k3_common.c | 36 +++++++++++++++++++
drivers/remoteproc/ti_k3_common.h | 1 +
drivers/remoteproc/ti_k3_dsp_remoteproc.c | 36 +------------------
drivers/remoteproc/ti_k3_m4_remoteproc.c | 42 ++---------------------
4 files changed, 41 insertions(+), 74 deletions(-)
diff --git a/drivers/remoteproc/ti_k3_common.c b/drivers/remoteproc/ti_k3_common.c
index cec664819a1d..a78abecf2756 100644
--- a/drivers/remoteproc/ti_k3_common.c
+++ b/drivers/remoteproc/ti_k3_common.c
@@ -169,5 +169,41 @@ int k3_rproc_release(struct k3_rproc *kproc)
}
EXPORT_SYMBOL_GPL(k3_rproc_release);
+int k3_rproc_request_mbox(struct rproc *rproc)
+{
+ struct k3_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_rproc_mbox_callback;
+ client->tx_block = false;
+ client->knows_txdone = false;
+
+ kproc->mbox = mbox_request_channel(client, 0);
+ if (IS_ERR(kproc->mbox))
+ return dev_err_probe(dev, PTR_ERR(kproc->mbox),
+ "mbox_request_channel failed\n");
+
+ /*
+ * 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 (%pe)\n", ERR_PTR(ret));
+ mbox_free_channel(kproc->mbox);
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_request_mbox);
+
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("TI K3 common Remoteproc code");
diff --git a/drivers/remoteproc/ti_k3_common.h b/drivers/remoteproc/ti_k3_common.h
index 37516765e505..8e44c0455c39 100644
--- a/drivers/remoteproc/ti_k3_common.h
+++ b/drivers/remoteproc/ti_k3_common.h
@@ -92,4 +92,5 @@ void k3_rproc_mbox_callback(struct mbox_client *client, void *data);
void k3_rproc_kick(struct rproc *rproc, int vqid);
int k3_rproc_reset(struct k3_rproc *kproc);
int k3_rproc_release(struct k3_rproc *kproc);
+int k3_rproc_request_mbox(struct rproc *rproc);
#endif /* REMOTEPROC_TI_K3_COMMON_H */
diff --git a/drivers/remoteproc/ti_k3_dsp_remoteproc.c b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
index 64affbe0ba29..c8bab63a4f4d 100644
--- a/drivers/remoteproc/ti_k3_dsp_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
@@ -24,40 +24,6 @@
#define KEYSTONE_RPROC_LOCAL_ADDRESS_MASK (SZ_16M - 1)
-static int k3_dsp_rproc_request_mbox(struct rproc *rproc)
-{
- struct k3_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_rproc_mbox_callback;
- client->tx_block = false;
- client->knows_txdone = false;
-
- kproc->mbox = mbox_request_channel(client, 0);
- if (IS_ERR(kproc->mbox))
- return dev_err_probe(dev, PTR_ERR(kproc->mbox),
- "mbox_request_channel failed\n");
-
- /*
- * 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 (%pe)\n", ERR_PTR(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
@@ -460,7 +426,7 @@ static int k3_dsp_rproc_probe(struct platform_device *pdev)
kproc->dev = dev;
kproc->data = data;
- ret = k3_dsp_rproc_request_mbox(rproc);
+ ret = k3_rproc_request_mbox(rproc);
if (ret)
return ret;
diff --git a/drivers/remoteproc/ti_k3_m4_remoteproc.c b/drivers/remoteproc/ti_k3_m4_remoteproc.c
index c24085411e1c..6dd93c8d0553 100644
--- a/drivers/remoteproc/ti_k3_m4_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_m4_remoteproc.c
@@ -21,27 +21,6 @@
#include "ti_sci_proc.h"
#include "ti_k3_common.h"
-static int k3_m4_rproc_ping_mbox(struct k3_rproc *kproc)
-{
- struct device *dev = kproc->dev;
- int 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);
- return ret;
- }
-
- return 0;
-}
-
/*
* The M4 cores have a local reset that affects only the CPU, and a
* generic module reset that powers on the device and allows the internal
@@ -350,10 +329,6 @@ static int k3_m4_rproc_start(struct rproc *rproc)
struct device *dev = kproc->dev;
int ret;
- ret = k3_m4_rproc_ping_mbox(kproc);
- if (ret)
- return ret;
-
ret = k3_rproc_release(kproc);
if (ret)
dev_err(dev, "local-reset deassert failed, ret = %d\n", ret);
@@ -386,14 +361,9 @@ static int k3_m4_rproc_stop(struct rproc *rproc)
static int k3_m4_rproc_attach(struct rproc *rproc)
{
struct k3_rproc *kproc = rproc->priv;
- int ret;
kproc->is_attach_ongoing = true;
- ret = k3_m4_rproc_ping_mbox(kproc);
- if (ret)
- return ret;
-
return 0;
}
@@ -506,15 +476,9 @@ static int k3_m4_rproc_probe(struct platform_device *pdev)
dev_info(dev, "configured M4F for remoteproc mode\n");
}
- kproc->client.dev = dev;
- kproc->client.tx_done = NULL;
- kproc->client.rx_callback = k3_rproc_mbox_callback;
- kproc->client.tx_block = false;
- kproc->client.knows_txdone = false;
- kproc->mbox = mbox_request_channel(&kproc->client, 0);
- if (IS_ERR(kproc->mbox))
- return dev_err_probe(dev, PTR_ERR(kproc->mbox),
- "mbox_request_channel failed\n");
+ ret = k3_rproc_request_mbox(rproc);
+ if (ret)
+ return ret;
ret = devm_rproc_add(dev, rproc);
if (ret)
--
2.34.1
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