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Date: Thu, 10 Feb 2022 17:05:19 +0200
From: Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>
To: lgirdwood@...il.com, broonie@...nel.org,
pierre-louis.bossart@...ux.intel.com,
ranjani.sridharan@...ux.intel.com
Cc: alsa-devel@...a-project.org, kai.vehmanen@...ux.intel.com,
daniel.baluta@....com, tiwai@...e.com,
linux-kernel@...r.kernel.org, fred.oh@...ux.intel.com
Subject: [PATCH v2 3/9] ASoC: SOF: ipc: Read and pass the whole message to handlers for IPC events
Change the parameter list for the firmware initiated message (IPC event)
handler functions to:
handler(struct snd_sof_dev *sdev, void *full_msg);
Allocate memory and read the whole message in snd_sof_ipc_msgs_rx() then
pass the pointer to the function handling the message.
Do this only if we actually have a function which is tasked to process the
given type.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@...ux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>
---
sound/soc/sof/ipc.c | 85 +++++++++++++++++++++++----------------------
1 file changed, 44 insertions(+), 41 deletions(-)
diff --git a/sound/soc/sof/ipc.c b/sound/soc/sof/ipc.c
index 16a0d7a059f3..ee56d4fa4053 100644
--- a/sound/soc/sof/ipc.c
+++ b/sound/soc/sof/ipc.c
@@ -18,8 +18,10 @@
#include "sof-audio.h"
#include "ops.h"
-static void ipc_trace_message(struct snd_sof_dev *sdev, u32 msg_type);
-static void ipc_stream_message(struct snd_sof_dev *sdev, u32 msg_cmd);
+typedef void (*ipc_rx_callback)(struct snd_sof_dev *sdev, void *msg_buf);
+
+static void ipc_trace_message(struct snd_sof_dev *sdev, void *msg_buf);
+static void ipc_stream_message(struct snd_sof_dev *sdev, void *msg_buf);
/*
* IPC message Tx/Rx message handling.
@@ -477,44 +479,30 @@ void snd_sof_ipc_reply(struct snd_sof_dev *sdev, u32 msg_id)
}
EXPORT_SYMBOL(snd_sof_ipc_reply);
-static void ipc_comp_notification(struct snd_sof_dev *sdev,
- struct sof_ipc_cmd_hdr *hdr)
+static void ipc_comp_notification(struct snd_sof_dev *sdev, void *msg_buf)
{
+ struct sof_ipc_cmd_hdr *hdr = msg_buf;
u32 msg_type = hdr->cmd & SOF_CMD_TYPE_MASK;
- struct sof_ipc_ctrl_data *cdata;
- int ret;
switch (msg_type) {
case SOF_IPC_COMP_GET_VALUE:
case SOF_IPC_COMP_GET_DATA:
- cdata = kmalloc(hdr->size, GFP_KERNEL);
- if (!cdata)
- return;
-
- /* read back full message */
- ret = snd_sof_ipc_msg_data(sdev, NULL, cdata, hdr->size);
- if (ret < 0) {
- dev_err(sdev->dev,
- "error: failed to read component event: %d\n", ret);
- goto err;
- }
break;
default:
dev_err(sdev->dev, "error: unhandled component message %#x\n", msg_type);
return;
}
- snd_sof_control_notify(sdev, cdata);
-
-err:
- kfree(cdata);
+ snd_sof_control_notify(sdev, msg_buf);
}
/* DSP firmware has sent host a message */
void snd_sof_ipc_msgs_rx(struct snd_sof_dev *sdev)
{
+ ipc_rx_callback rx_callback = NULL;
struct sof_ipc_cmd_hdr hdr;
- u32 cmd, type;
+ void *msg_buf;
+ u32 cmd;
int err;
/* read back header */
@@ -523,10 +511,15 @@ void snd_sof_ipc_msgs_rx(struct snd_sof_dev *sdev)
dev_warn(sdev->dev, "failed to read IPC header: %d\n", err);
return;
}
+
+ if (hdr.size < sizeof(hdr)) {
+ dev_err(sdev->dev, "The received message size is invalid\n");
+ return;
+ }
+
ipc_log_header(sdev->dev, "ipc rx", hdr.cmd);
cmd = hdr.cmd & SOF_GLB_TYPE_MASK;
- type = hdr.cmd & SOF_CMD_TYPE_MASK;
/* check message type */
switch (cmd) {
@@ -551,20 +544,35 @@ void snd_sof_ipc_msgs_rx(struct snd_sof_dev *sdev)
case SOF_IPC_GLB_PM_MSG:
break;
case SOF_IPC_GLB_COMP_MSG:
- ipc_comp_notification(sdev, &hdr);
+ rx_callback = ipc_comp_notification;
break;
case SOF_IPC_GLB_STREAM_MSG:
- /* need to pass msg id into the function */
- ipc_stream_message(sdev, hdr.cmd);
+ rx_callback = ipc_stream_message;
break;
case SOF_IPC_GLB_TRACE_MSG:
- ipc_trace_message(sdev, type);
+ rx_callback = ipc_trace_message;
break;
default:
- dev_err(sdev->dev, "error: unknown DSP message 0x%x\n", cmd);
+ dev_err(sdev->dev, "%s: Unknown DSP message: 0x%x\n", __func__, cmd);
break;
}
+ if (rx_callback) {
+ /* read the full message as we have rx handler for it */
+ msg_buf = kmalloc(hdr.size, GFP_KERNEL);
+ if (!msg_buf)
+ return;
+
+ err = snd_sof_ipc_msg_data(sdev, NULL, msg_buf, hdr.size);
+ if (err < 0)
+ dev_err(sdev->dev, "%s: Failed to read message: %d\n",
+ __func__, err);
+ else
+ rx_callback(sdev, msg_buf);
+
+ kfree(msg_buf);
+ }
+
ipc_log_header(sdev->dev, "ipc rx done", hdr.cmd);
}
EXPORT_SYMBOL(snd_sof_ipc_msgs_rx);
@@ -573,19 +581,14 @@ EXPORT_SYMBOL(snd_sof_ipc_msgs_rx);
* IPC trace mechanism.
*/
-static void ipc_trace_message(struct snd_sof_dev *sdev, u32 msg_type)
+static void ipc_trace_message(struct snd_sof_dev *sdev, void *msg_buf)
{
- struct sof_ipc_dma_trace_posn posn;
- int ret;
+ struct sof_ipc_cmd_hdr *hdr = msg_buf;
+ u32 msg_type = hdr->cmd & SOF_CMD_TYPE_MASK;
switch (msg_type) {
case SOF_IPC_TRACE_DMA_POSITION:
- /* read back full message */
- ret = snd_sof_ipc_msg_data(sdev, NULL, &posn, sizeof(posn));
- if (ret < 0)
- dev_warn(sdev->dev, "failed to read trace position: %d\n", ret);
- else
- snd_sof_trace_update_pos(sdev, &posn);
+ snd_sof_trace_update_pos(sdev, msg_buf);
break;
default:
dev_err(sdev->dev, "error: unhandled trace message %#x\n", msg_type);
@@ -667,11 +670,11 @@ static void ipc_xrun(struct snd_sof_dev *sdev, u32 msg_id)
}
/* stream notifications from DSP FW */
-static void ipc_stream_message(struct snd_sof_dev *sdev, u32 msg_cmd)
+static void ipc_stream_message(struct snd_sof_dev *sdev, void *msg_buf)
{
- /* get msg cmd type and msd id */
- u32 msg_type = msg_cmd & SOF_CMD_TYPE_MASK;
- u32 msg_id = SOF_IPC_MESSAGE_ID(msg_cmd);
+ struct sof_ipc_cmd_hdr *hdr = msg_buf;
+ u32 msg_type = hdr->cmd & SOF_CMD_TYPE_MASK;
+ u32 msg_id = SOF_IPC_MESSAGE_ID(hdr->cmd);
switch (msg_type) {
case SOF_IPC_STREAM_POSITION:
--
2.35.1
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