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| author |   Suman Anna <s-anna@ti.com> | 2015-01-09 15:21:58 -0600 |
|---|---|---|
| committer |   Ohad Ben-Cohen <ohad@wizery.com> | 2015-03-12 10:43:26 +0200 |
| commit | 315491e5d6ee66838a18a8ca0c14e6ffb376e48c (patch) | |
| tree | 308f7c9d3cef5ff6d0cd2508714fe7406dd9718c /drivers/remoteproc/da8xx_remoteproc.c | |
| parent | Linux 4.0-rc1 (diff) | |
| download | wireguard-linux-315491e5d6ee66838a18a8ca0c14e6ffb376e48c.tar.xz wireguard-linux-315491e5d6ee66838a18a8ca0c14e6ffb376e48c.zip | |
remoteproc: add IOMMU hardware capability flag
The remoteproc framework currently relies on iommu_present() on
the bus the device is on, to perform MMU management. However, this
logic doesn't scale for multi-arch, especially for processors that
do not have an IOMMU. Replace this logic instead by using a h/w
capability flag for the presence of IOMMU in the rproc structure.
This issue is seen on OMAP platforms when trying to add a remoteproc
driver for a small Cortex M3 called the WkupM3 used for suspend /
resume management on TI AM335/AM437x SoCs. This processor does not
have an MMU. Same is the case with another processor subsystem
PRU-ICSS on AM335/AM437x. All these are platform devices, and the
current iommu_present check will not scale for the same kernel image
to support OMAP4/OMAP5 and AM335/AM437x.
The existing platform implementation drivers - OMAP remoteproc, STE
Modem remoteproc and DA8xx remoteproc, are updated as well to properly
configure the newly added rproc field.
Cc: Robert Tivy <rtivy@ti.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Suman Anna <s-anna@ti.com>
[small change in the commit title and in a single comment]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Diffstat (limited to 'drivers/remoteproc/da8xx_remoteproc.c')
| -rw-r--r-- | drivers/remoteproc/da8xx_remoteproc.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/remoteproc/da8xx_remoteproc.c b/drivers/remoteproc/da8xx_remoteproc.c index 89fd057e5f1d..f8d6a0661c14 100644 --- a/drivers/remoteproc/da8xx_remoteproc.c +++ b/drivers/remoteproc/da8xx_remoteproc.c @@ -224,6 +224,7 @@ static int da8xx_rproc_probe(struct platform_device *pdev) drproc = rproc->priv; drproc->rproc = rproc; + rproc->has_iommu = false; platform_set_drvdata(pdev, rproc); |