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author | Loic Pallardy <loic.pallardy@st.com> | 2018-07-27 15:14:45 +0200 |
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committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2018-10-10 07:40:55 +0200 |
commit | c874bf59add0e6ed1d5d8c1753b9b66d51e3f640 (patch) | |
tree | 29afc8e8b02891b4b5ed3249f6dbec5a0244a7b1 /drivers/remoteproc | |
parent | remoteproc: add helper function to allocate rproc_mem_entry from reserved memory (diff) | |
download | linux-c874bf59add0e6ed1d5d8c1753b9b66d51e3f640.tar.xz linux-c874bf59add0e6ed1d5d8c1753b9b66d51e3f640.zip |
remoteproc: add helper function to check carveout device address
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>
Diffstat (limited to 'drivers/remoteproc')
-rw-r--r-- | drivers/remoteproc/remoteproc_core.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index d7a623b8801c..a0a5e32935bc 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -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; |