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remoteproc: add rproc_va_to_pa function

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This new function translates CPU virtual address in
CPU physical one according to virtual address location.

Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Loic Pallardy 2018-07-27 15:14:37 +02:00 committed by Bjorn Andersson
parent 3bc8140b15
commit eb30596eae
1 changed files with 17 additions and 1 deletions
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18
drivers/remoteproc/remoteproc_core.c
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@ -140,6 +140,22 @@ static void rproc_disable_iommu(struct rproc *rproc)
iommu_domain_free(domain);
}
static phys_addr_t rproc_va_to_pa(void *cpu_addr)
{
/*
* Return physical address according to virtual address location
* - in vmalloc: if region ioremapped or defined as dma_alloc_coherent
* - in kernel: if region allocated in generic dma memory pool
*/
if (is_vmalloc_addr(cpu_addr)) {
return page_to_phys(vmalloc_to_page(cpu_addr)) +
offset_in_page(cpu_addr);
}
WARN_ON(!virt_addr_valid(cpu_addr));
return virt_to_phys(cpu_addr);
}
/**
* rproc_da_to_va() - lookup the kernel virtual address for a remoteproc address
* @rproc: handle of a remote processor
@ -711,7 +727,7 @@ static int rproc_handle_carveout(struct rproc *rproc,
* In this case, the device address and the physical address
* are the same.
*/
rsc->pa = dma;
rsc->pa = (u32)rproc_va_to_pa(va);
carveout->va = va;
carveout->len = rsc->len;