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remoteproc: add helper function to check carveout device address

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This patch introduces a function to verify that a specified carveout
is fitting request device address and associated length

Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Loic Pallardy 2018-07-27 15:14:45 +02:00 committed by Bjorn Andersson
parent 1429cca117
commit c874bf59ad
1 changed files with 47 additions and 0 deletions
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47
drivers/remoteproc/remoteproc_core.c
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@ -259,6 +259,53 @@ rproc_find_carveout_by_name(struct rproc *rproc, const char *name, ...)
return mem;
}
/**
* rproc_check_carveout_da() - Check specified carveout da configuration
* @rproc: handle of a remote processor
* @mem: pointer on carveout to check
* @da: area device address
* @len: associated area size
*
* This function is a helper function to verify requested device area (couple
* da, len) is part of specified carevout.
*
* Return: 0 if carveout match request else -ENOMEM
*/
int rproc_check_carveout_da(struct rproc *rproc, struct rproc_mem_entry *mem,
u32 da, u32 len)
{
struct device *dev = &rproc->dev;
int delta = 0;
/* Check requested resource length */
if (len > mem->len) {
dev_err(dev, "Registered carveout doesn't fit len request\n");
return -ENOMEM;
}
if (da != FW_RSC_ADDR_ANY && mem->da == FW_RSC_ADDR_ANY) {
/* Update existing carveout da */
mem->da = da;
} else if (da != FW_RSC_ADDR_ANY && mem->da != FW_RSC_ADDR_ANY) {
delta = da - mem->da;
/* Check requested resource belongs to registered carveout */
if (delta < 0) {
dev_err(dev,
"Registered carveout doesn't fit da request\n");
return -ENOMEM;
}
if (delta + len > mem->len) {
dev_err(dev,
"Registered carveout doesn't fit len request\n");
return -ENOMEM;
}
}
return 0;
}
int rproc_alloc_vring(struct rproc_vdev *rvdev, int i)
{
struct rproc *rproc = rvdev->rproc;