Hello Linus,
Dave Airlie asked me to send this patch to you for review.
See link below for cover-letter for this patch that explains the background a
bit more:
http://lists.freedesktop.org/archives/dri-devel/2014-December/074452.html
Thanks,
Oded
On 12/22/2014 01:07 PM, Oded Gabbay wrote:
> AMD GPU devices are dependent on AMD IOMMU controller functionality to allow
> the GPU to access a process's virtual memory address space, without the need
> for pinning the memory.
>
> This patch changes the order in the drivers makefile, so iommu/ subsystem is
> linked before gpu/ subsystem. That way, if the gpu and iommu drivers are
> compiled inside the kernel image (not as modules), the correct order of device
> loading is still maintained (iommu module is loaded before gpu module).
>
> Signed-off-by: Oded Gabbay <oded.gabbay at amd.com>
> ---
> drivers/Makefile | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/Makefile b/drivers/Makefile
> index ebee555..106200f 100644
> --- a/drivers/Makefile
> +++ b/drivers/Makefile
> @@ -50,7 +50,10 @@ obj-$(CONFIG_RESET_CONTROLLER) += reset/
> obj-y += tty/
> obj-y += char/
>
> -# gpu/ comes after char for AGP vs DRM startup
> +# iommu/ comes before gpu as gpu are using iommu controllers
> +obj-$(CONFIG_IOMMU_SUPPORT) += iommu/
> +
> +# gpu/ comes after char for AGP vs DRM startup and after iommu
> obj-y += gpu/
>
> obj-$(CONFIG_CONNECTOR) += connector/
> @@ -141,7 +144,6 @@ obj-y += clk/
>
> obj-$(CONFIG_MAILBOX) += mailbox/
> obj-$(CONFIG_HWSPINLOCK) += hwspinlock/
> -obj-$(CONFIG_IOMMU_SUPPORT) += iommu/
> obj-$(CONFIG_REMOTEPROC) += remoteproc/
> obj-$(CONFIG_RPMSG) += rpmsg/
>
>
