[PATCH v4 02/17] remoteproc: add rproc_va_to_pa function

[Loic Pallardy]

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

Signed-off-by: Loic Pallardy <loic.palla...@st.com>
Acked-by: Bjorn Andersson <bjorn.anders...@linaro.org>
---
 drivers/remoteproc/remoteproc_core.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/remoteproc/remoteproc_core.c 
b/drivers/remoteproc/remoteproc_core.c
index 437fabf..8e5fe1e 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;
-- 
1.9.1