linux-kernel - RE: [PATCH v3 00/13] remoteproc: add fixed memory region support

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Date:   Tue, 3 Apr 2018 12:04:17 +0000
From:   Loic PALLARDY <loic.pallardy@...com>
To:     "bjorn.andersson@...aro.org" <bjorn.andersson@...aro.org>,
        "ohad@...ery.com" <ohad@...ery.com>
CC:     "linux-remoteproc@...r.kernel.org" <linux-remoteproc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Arnaud POULIQUEN" <arnaud.pouliquen@...com>,
        "benjamin.gaignard@...aro.org" <benjamin.gaignard@...aro.org>
Subject: RE: [PATCH v3 00/13] remoteproc: add fixed memory region support

Hi Bjorn, 

Just a gentle ping...
As discussed during Linaro connect, I'll appreciate if you can share me your comments...

Regards,
Loic

> -----Original Message-----
> From: Loic PALLARDY
> Sent: Thursday, March 01, 2018 5:24 PM
> To: bjorn.andersson@...aro.org; ohad@...ery.com
> Cc: linux-remoteproc@...r.kernel.org; linux-kernel@...r.kernel.org;
> Arnaud POULIQUEN <arnaud.pouliquen@...com>;
> benjamin.gaignard@...aro.org; Loic PALLARDY <loic.pallardy@...com>
> Subject: [PATCH v3 00/13] remoteproc: add fixed memory region support
> 
> The aim of the series is to implement carveout memory management as
> discussed during OpenAMP weekly call and defined in proposed document
> [1]
> 
> This first series focus only on adding support of the different types of
> carveout memories (dynamic, fixed, platform driver depend...).
> 64bit resource table will be addressed in a next series.
> 
> [1]: http://openamp.github.io/docs/mca/coprocessor-memory-definition-
> v6.pdf
> 
> ---
> Changes sine V2:
> Reshuffle the series to:
> - Take into account Bjorn's comments.
> - Add patch to check consistency between carveout resource request and
> IOMMU
>   support.
> - Introduce platform specific prepare and unprepare ops to enable HW like
>   clock, bus, regulator, memory region... before loading co-processor
> firmware.
> - Rely on memory carveout management for all remoteproc memory
> allocations.
> - Lookup pre-registered carveout by name first.
> - Create a subdevice for each vdev declared in firmware resource table that
>   will be used by virtio based driver to retrieve specific memory pool.
> 
> This series takes some assumptions for carveout names associated to vdev:
> - For vring: "vdev%xvring%x" with vdev index from resource table and vring
> index
>   in vdev.
> - For vdev buffer: "vdev%xbuffer" with vdev index from resource table
> 
> This will be changed in the future, adding names field in vdev resource in
> next resource table version.
> 
> 
> Changes since V1:
> - Minor corrections on first 7 patches (error management)
> - Add "memory device" support on the top of first 7 patches.
>   Goal is to answer use case reported during OpenAMP weekly discussion:
>   - "Be able to specify memory region for vring and buffer allocation, even
>     if no specific request defined in firmware resource table."
>   Patches offer the capability to create a "memory device" associated to a
>   carveout with a dedicated DMA memory pool. Different resource handlers
> are
>   modified to look-up for specific carveout by name. If match found and
> associated
>   "memory device" present, device is used instead of rproc platform device
> for
>   allocation.
> 
> 
> Loic Pallardy (13):
>   remoteproc: configure IOMMU only if device address requested
>   remoteproc: add rproc_va_to_pa function
>   remoteproc: add release ops in rproc_mem_entry struct
>   remoteproc: add name in rproc_mem_entry struct
>   remoteproc: add helper function to allocate and init rproc_mem_entry
>     struct
>   remoteproc: introduce rproc_add_carveout function
>   remoteproc: introduce rproc_find_carveout_by_name function
>   remoteproc: add prepare and unprepare ops
>   remoteproc: modify rproc_handle_carveout to support pre-registered
>     region
>   remoteproc: modify vring allocation to support pre-registered region
>   remoteproc: create vdev subdevice with specific dma memory pool
>   rpmsg: virtio: allocate buffer from parent
>   remoteproc: st: add reserved memory support
> 
>  drivers/remoteproc/remoteproc_core.c    | 332
> ++++++++++++++++++++++++++++----
>  drivers/remoteproc/remoteproc_debugfs.c |   1 +
>  drivers/remoteproc/remoteproc_virtio.c  |   2 +-
>  drivers/remoteproc/st_remoteproc.c      |  68 ++++++-
>  drivers/rpmsg/virtio_rpmsg_bus.c        |   2 +-
>  include/linux/remoteproc.h              |  22 ++-
>  6 files changed, 379 insertions(+), 48 deletions(-)
> 
> --
> 1.9.1