diff options
author | Loic Pallardy <loic.pallardy@st.com> | 2018-07-27 15:14:37 +0200 |
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committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2018-10-10 07:39:03 +0200 |
commit | eb30596eae947ce9072507a3ca112a9dd4601d85 (patch) | |
tree | 6dfa0fce0677db8abd70675a566c624521988cb8 /drivers/remoteproc | |
parent | remoteproc: configure IOMMU only if device address requested (diff) | |
download | linux-eb30596eae947ce9072507a3ca112a9dd4601d85.tar.xz linux-eb30596eae947ce9072507a3ca112a9dd4601d85.zip |
remoteproc: add rproc_va_to_pa function
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>
Diffstat (limited to 'drivers/remoteproc')
-rw-r--r-- | drivers/remoteproc/remoteproc_core.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 8ca752cbcfe9..ebadaad070a5 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -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; |