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mailbox: enlarge devfs receive buffer size to 128 bytes [1/1]

Browse Source 
PD#SWPL-143077

Problem:
Userspace process cannot get enough data sent from secpu
via nee2scpu (now the maximum data size is 96 bytes),
userspace needs to read up to 128 bytes one time from
secpu via nee2scpu.

Solution:
Enlarge the mailbox devfs receive buffer size to 128 bytes.

Verify:
T3-T965D4

Change-Id: Ia4d46206306c82ae7a37bb7c1249f10a6c4fcfb2
Signed-off-by: Yao Jie <jie.yao@amlogic.com>
This commit is contained in:
Yao Jie
2023-10-19 20:32:04 +08:00
committed by Luan Yuan
parent 3a03782cfa
commit b6a60af2fe
1 changed files with 6 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/mailbox/meson_mbox_devfs.c
+6 -5
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@@ -116,7 +116,7 @@ static ssize_t mbox_message_read(struct file *filp, char __user *userbuf,
struct aml_mbox_data *aml_data = aml_priv->aml_data;
struct device *dev = aml_dev->p_dev;
int ret = 0;
int rxsize = count;
int rxsize;
ret = wait_for_completion_killable(&aml_data->complete);
if (ret < 0) {
@@ -125,10 +125,11 @@ static ssize_t mbox_message_read(struct file *filp, char __user *userbuf,
}
barrier();
*ppos = 0;
if (rxsize > aml_data->rxsize)
rxsize = aml_data->rxsize;
if (count > MBOX_USER_SIZE)
count = MBOX_USER_SIZE;
rxsize = count > aml_data->rxsize ? aml_data->rxsize : count;
ret = simple_read_from_buffer(userbuf, rxsize, ppos,
aml_data->rxbuf, MBOX_DATA_SIZE);
aml_data->rxbuf, MBOX_USER_SIZE);
return ret;
}
@@ -157,7 +158,7 @@ static int mbox_message_open(struct inode *inode, struct file *filp)
case MAILBOX_AOCPU:
case MAILBOX_DSP:
case MAILBOX_SECPU:
aml_data->rxbuf = devm_kzalloc(aml_dev->p_dev, MBOX_DATA_SIZE, GFP_KERNEL);
aml_data->rxbuf = devm_kzalloc(aml_dev->p_dev, MBOX_USER_SIZE, GFP_KERNEL);
if (IS_ERR(aml_data->rxbuf)) {
devm_kfree(aml_dev->p_dev, aml_priv);
devm_kfree(aml_dev->p_dev, aml_data);