Hi,
On Fri, Aug 26, 2022 at 01:52:28PM +0200, Arnaud Pouliquen wrote:
> 1) Update from V7 [1]:
>
> - rebase on rproc-next branch [2], commit 729c16326b7f ("remoteproc: imx_dsp_rproc: fix argument 2 of rproc_mem_entry_init")
> The updates take into account the integration of the
> commit 1404acbb7f68 ("remoteproc: Fix dma_mem leak after rproc_shutdown")
> - add Reviewed-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> according to reviews on V7
>
>
> [1] https://lkml.org/lkml/2022/7/13/663
> [2] https://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux.git/log/?h=for-next
>
> 2) Patchset description:
>
> This series is a part of the work initiated a long time ago in
> the series "remoteproc: Decorelate virtio from core"[3]
>
> Objective of the work:
> - Update the remoteproc VirtIO device creation (use platform device)
> - Allow to declare remoteproc VirtIO device in DT
> - declare resources associated to a remote proc VirtIO
> - declare a list of VirtIO supported by the platform.
> - Prepare the enhancement to more VirtIO devices (e.g I2C, audio, video, ...).
> For instance be able to declare a I2C device in a virtio-i2C node.
> - Keep the legacy working!
> - Try to improve the picture about concerns reported by Christoph Hellwing [4][5]
>
> [3] https://lkml.org/lkml/2020/4/16/1817
> [4] https://lkml.org/lkml/2021/6/23/607
> [5] https://patchwork.kernel.org/project/linux-remoteproc/patch/AOKowLclCbOCKxyiJ71WeNyuAAj2q8EUtxrXbyky5E@xxxxxxxxxxxxxxxxxxxx/
>
> In term of device tree this would result in such hierarchy (stm32mp1 example with 2 virtio RPMSG):
>
> m4_rproc: m4@10000000 {
> compatible = "st,stm32mp1-m4";
> reg = <0x10000000 0x40000>,
> <0x30000000 0x40000>,
> <0x38000000 0x10000>;
> memory-region = <&retram>, <&mcuram>,<&mcuram2>;
> mboxes = <&ipcc 2>, <&ipcc 3>;
> mbox-names = "shutdown", "detach";
> status = "okay";
>
> #address-cells = <1>;
> #size-cells = <0>;
>
> vdev@0 {
> compatible = "rproc-virtio";
> reg = <0>;
> virtio,id = <7>; /* RPMSG */
> memory-region = <&vdev0vring0>, <&vdev0vring1>, <&vdev0buffer>;
> mboxes = <&ipcc 0>, <&ipcc 1>;
> mbox-names = "vq0", "vq1";
> status = "okay";
> };
>
> vdev@1 {
> compatible = "rproc-virtio";
> reg = <1>;
> virtio,id = <7>; /*RPMSG */
> memory-region = <&vdev1vring0>, <&vdev1vring1>, <&vdev1buffer>;
> mboxes = <&ipcc 4>, <&ipcc 5>;
> mbox-names = "vq0", "vq1";
> status = "okay";
> };
> };
I was in the process of applying this set when the last patch gave me a
checkpatch warning about "virtio,rproc" not being documented.
I suggest to introduce a new "virtio-rproc.yaml" based on this work[1], with the
above in the example sections.
Thanks,
Mathieu
[1]. https://elixir.bootlin.com/linux/v6.0-rc6/source/Documentation/devicetree/bindings/virtio/virtio-device.yaml
>
> I have divided the work in 4 steps to simplify the review, This series implements only
> the step 1:
> step 1: Redefine the remoteproc VirtIO device as a platform device
> - migrate rvdev management in remoteproc virtio.c,
> - create a remotproc virtio config ( can be disabled for platform that not use VirtIO IPC.
> step 2: Add possibility to declare and probe a VirtIO sub node
> - VirtIO bindings declaration,
> - multi DT VirtIO devices support,
> - introduction of a remote proc virtio bind device mechanism ,
> => https://github.com/arnopo/linux/commits/step2-virtio-in-DT
> step 3: Add memory declaration in VirtIO subnode
> => https://github.com/arnopo/linux/commits/step3-virtio-memories
> step 4: Add mailbox declaration in VirtIO subnode
> => https://github.com/arnopo/linux/commits/step4-virtio-mailboxes
>
> Arnaud Pouliquen (4):
> remoteproc: core: Introduce rproc_rvdev_add_device function
> remoteproc: core: Introduce rproc_add_rvdev function
> remoteproc: Move rproc_vdev management to remoteproc_virtio.c
> remoteproc: virtio: Create platform device for the remoteproc_virtio
>
> drivers/remoteproc/remoteproc_core.c | 154 +++---------------
> drivers/remoteproc/remoteproc_internal.h | 23 ++-
> drivers/remoteproc/remoteproc_virtio.c | 189 ++++++++++++++++++++---
> include/linux/remoteproc.h | 6 +-
> 4 files changed, 210 insertions(+), 162 deletions(-)
>
> --
> 2.24.3
>
