From 0e49b72c8c91f9ea65ae62ca3061f885aa06a6f6 Mon Sep 17 00:00:00 2001 From: Ohad Ben-Cohen Date: Sun, 1 Jul 2012 11:30:57 +0300 Subject: [PATCH] remoteproc: support non-iommu carveout assignment MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Publish carveout addresses on non-iommu setups too. Reported-and-acked-by: Sjur Brændeland Signed-off-by: Ohad Ben-Cohen --- drivers/remoteproc/remoteproc_core.c | 34 ++++++++++++++++------------ 1 file changed, 19 insertions(+), 15 deletions(-) diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 4a77dc1df3d8..c85db123ba0a 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -713,23 +713,27 @@ static int rproc_handle_carveout(struct rproc *rproc, list_add_tail(&mapping->node, &rproc->mappings); dev_dbg(dev, "carveout mapped 0x%x to 0x%x\n", rsc->da, dma); - - /* - * Some remote processors might need to know the pa - * even though they are behind an IOMMU. E.g., OMAP4's - * remote M3 processor needs this so it can control - * on-chip hardware accelerators that are not behind - * the IOMMU, and therefor must know the pa. - * - * Generally we don't want to expose physical addresses - * if we don't have to (remote processors are generally - * _not_ trusted), so we might want to do this only for - * remote processor that _must_ have this (e.g. OMAP4's - * dual M3 subsystem). - */ - rsc->pa = dma; } + /* + * Some remote processors might need to know the pa + * even though they are behind an IOMMU. E.g., OMAP4's + * remote M3 processor needs this so it can control + * on-chip hardware accelerators that are not behind + * the IOMMU, and therefor must know the pa. + * + * Generally we don't want to expose physical addresses + * if we don't have to (remote processors are generally + * _not_ trusted), so we might want to do this only for + * remote processor that _must_ have this (e.g. OMAP4's + * dual M3 subsystem). + * + * Non-IOMMU processors might also want to have this info. + * In this case, the device address and the physical address + * are the same. + */ + rsc->pa = dma; + carveout->va = va; carveout->len = rsc->len; carveout->dma = dma; -- GitLab