[PATCH 3/6] remoteproc: k3-r5: Refactor mbox request code in start

Suman Anna
2021-05-22T00:09:10Z

Refactor out the mailbox request and associated ping logic code
from k3_r5_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>
---
drivers/remoteproc/ti_k3_r5_remoteproc.c | 66 ++++++++++++++----------
1 file changed, 40 insertions(+), 26 deletions(-)

diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c b/drivers/remoteproc/ti_k3_r5_remoteproc.c
index 2975393ebacd..e7e1ca71763e 100644
--- a/drivers/remoteproc/ti_k3_r5_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c
@@ -376,6 +376,44 @@ static inline int k3_r5_core_run(struct k3_r5_core *core)
0, PROC_BOOT_CTRL_FLAG_R5_CORE_HALT);
}

+static int k3_r5_rproc_request_mbox(struct rproc *rproc)
+{
+ struct k3_r5_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_r5_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 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
@@ -495,38 +533,14 @@ static int k3_r5_rproc_start(struct rproc *rproc)
{
struct k3_r5_rproc *kproc = rproc->priv;
struct k3_r5_cluster *cluster = kproc->cluster;
- struct mbox_client *client = &kproc->client;
struct device *dev = kproc->dev;
struct k3_r5_core *core;
u32 boot_addr;
int ret;

- client->dev = dev;
- client->tx_done = NULL;
- client->rx_callback = k3_r5_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_r5_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;
/* TODO: add boot_addr sanity checking */
--
2.30.1