[PATCH v11 21/35] remoteproc: k3: Refactor rproc_request_mbox() implementations into common driver

Beleswar Padhi
2025-04-25T10:43:07Z

The rproc_request_mbox() implementations in TI K3 R5, DSP and M4
remoteproc drivers acquire the mailbox channel and send the same message
through the acquired channel.

Refactor the above function into the ti_k3_common.c driver as
k3_rproc_request_mbox() and use it throughout R5, DSP and M4 drivers.

Signed-off-by: Beleswar Padhi <b-padhi@ti.com>
Tested-by: Judith Mendez <jm@ti.com>
---
v11: Changelog:
1. Carried T/B tag.

Link to v10:
https://lore.kernel.org/all/20250417182001.3903905-20-b-padhi@ti.com/

v10: Changelog:
1. Split [v9 14/26] into [v10 18/33] and [v10 19/33] patches.

Link to v9:
https://lore.kernel.org/all/20250317120622.1746415-15-b-padhi@ti.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 | 37 +----------------------
drivers/remoteproc/ti_k3_r5_remoteproc.c | 37 +----------------------
5 files changed, 40 insertions(+), 107 deletions(-)

diff --git a/drivers/remoteproc/ti_k3_common.c b/drivers/remoteproc/ti_k3_common.c
index e4a924cb1798e..8801fdd10e90c 100644
--- a/drivers/remoteproc/ti_k3_common.c
+++ b/drivers/remoteproc/ti_k3_common.c
@@ -151,5 +151,41 @@ 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 c1af39cd288c1..721492fa0fb71 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 577dcd65093a9..d1d35f819c232 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
@@ -443,7 +409,7 @@ 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 0cc6c7b04e887..4d5a33021a77a 100644
--- a/drivers/remoteproc/ti_k3_m4_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_m4_remoteproc.c
@@ -21,41 +21,6 @@
#include "ti_sci_proc.h"
#include "ti_k3_common.h"

-static int k3_m4_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: %d\n", ret);
- mbox_free_channel(kproc->mbox);
- 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
@@ -493,7 +458,7 @@ static int k3_m4_rproc_probe(struct platform_device *pdev)
dev_info(dev, "configured M4F for remoteproc mode\n");
}

- ret = k3_m4_rproc_request_mbox(rproc);
+ ret = k3_rproc_request_mbox(rproc);
if (ret)
return ret;

diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c b/drivers/remoteproc/ti_k3_r5_remoteproc.c
index dedc9456983e0..6177610d63980 100644
--- a/drivers/remoteproc/ti_k3_r5_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c
@@ -284,41 +284,6 @@ static inline int k3_r5_core_run(struct k3_rproc *kproc)
0, PROC_BOOT_CTRL_FLAG_R5_CORE_HALT);
}

-static int k3_r5_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: %d\n", ret);
- mbox_free_channel(kproc->mbox);
- return ret;
- }
-
- return 0;
-}
-
/*
* The R5F cores have controls for both a reset and a halt/run. The code
* execution from DDR requires the initial boot-strapping code to be run
@@ -1357,7 +1322,7 @@ static int k3_r5_cluster_rproc_init(struct platform_device *pdev)
kproc = core->kproc;
rproc = kproc->rproc;

- ret = k3_r5_rproc_request_mbox(rproc);
+ ret = k3_rproc_request_mbox(rproc);
if (ret)
return ret;

--
2.34.1