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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>
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1 changed files with 47 additions and 0 deletions
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@ -259,6 +259,53 @@ rproc_find_carveout_by_name(struct rproc *rproc, const char *name, ...)
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return mem;
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return mem;
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}
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}
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/**
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* rproc_check_carveout_da() - Check specified carveout da configuration
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* @rproc: handle of a remote processor
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* @mem: pointer on carveout to check
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* @da: area device address
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* @len: associated area size
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*
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* This function is a helper function to verify requested device area (couple
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* da, len) is part of specified carevout.
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*
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* Return: 0 if carveout match request else -ENOMEM
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*/
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int rproc_check_carveout_da(struct rproc *rproc, struct rproc_mem_entry *mem,
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u32 da, u32 len)
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{
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struct device *dev = &rproc->dev;
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int delta = 0;
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/* Check requested resource length */
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if (len > mem->len) {
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dev_err(dev, "Registered carveout doesn't fit len request\n");
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return -ENOMEM;
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}
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if (da != FW_RSC_ADDR_ANY && mem->da == FW_RSC_ADDR_ANY) {
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/* Update existing carveout da */
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mem->da = da;
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} else if (da != FW_RSC_ADDR_ANY && mem->da != FW_RSC_ADDR_ANY) {
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delta = da - mem->da;
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/* Check requested resource belongs to registered carveout */
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if (delta < 0) {
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dev_err(dev,
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"Registered carveout doesn't fit da request\n");
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return -ENOMEM;
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}
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if (delta + len > mem->len) {
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dev_err(dev,
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"Registered carveout doesn't fit len request\n");
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return -ENOMEM;
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}
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}
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return 0;
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}
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int rproc_alloc_vring(struct rproc_vdev *rvdev, int i)
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int rproc_alloc_vring(struct rproc_vdev *rvdev, int i)
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{
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{
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struct rproc *rproc = rvdev->rproc;
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struct rproc *rproc = rvdev->rproc;
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