From 2eab5efeb4d644d9c94e29c3cbb35a47f715bffd Mon Sep 17 00:00:00 2001 From: Suman Anna Date: Sun, 13 Feb 2022 14:12:45 -0600 Subject: [PATCH] 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: Suman Anna Reviewed-by: Mathieu Poirier Signed-off-by: Bjorn Andersson Link: https://lore.kernel.org/r/20220213201246.25952-5-s-anna@ti.com --- drivers/remoteproc/ti_k3_dsp_remoteproc.c | 67 ++++++++++++++++++------------- 1 file changed, 40 insertions(+), 27 deletions(-) diff --git a/drivers/remoteproc/ti_k3_dsp_remoteproc.c b/drivers/remoteproc/ti_k3_dsp_remoteproc.c index 939c5d9..b3ee03d 100644 --- a/drivers/remoteproc/ti_k3_dsp_remoteproc.c +++ b/drivers/remoteproc/ti_k3_dsp_remoteproc.c @@ -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 */ @@ -216,6 +216,43 @@ lreset: 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)) { -- 2.7.4