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Date: Sat, 29 Jun 2019 12:02:29 -0700
From: Bjorn Andersson <bjorn.andersson@...aro.org>
To: Clement Leger <cleger@...ray.eu>
Cc: Ohad Ben-Cohen <ohad@...ery.com>, linux-remoteproc@...r.kernel.org,
linux-kernel@...r.kernel.org, Loic PALLARDY <loic.pallardy@...com>,
Arnaud Pouliquen <arnaud.pouliquen@...com>
Subject: Re: [PATCH] remoteproc: add vendor resources handling
On Mon 17 Jun 05:57 PDT 2019, Clement Leger wrote:
> In order to allow rproc backend to handle vendor resources such as in
> OpenAMP, add a handle_rsc hook. This hook allow the rproc backends to
> handle vendor resources as they like. The hook will be called only for
> vendor resources and should return RSC_HANDLED on successful resource
> handling, RSC_IGNORED if resource was ignored, or a negative value on
> error.
>
> Signed-off-by: Clement Leger <cleger@...ray.eu>
Applied
Thanks,
Bjorn
> ---
> Documentation/remoteproc.txt | 14 +++++++++-----
> drivers/remoteproc/remoteproc_core.c | 14 ++++++++++++++
> drivers/remoteproc/remoteproc_internal.h | 11 +++++++++++
> include/linux/remoteproc.h | 32 ++++++++++++++++++++++++++------
> 4 files changed, 60 insertions(+), 11 deletions(-)
>
> diff --git a/Documentation/remoteproc.txt b/Documentation/remoteproc.txt
> index 77fb03acdbb4..03c3d2e568b0 100644
> --- a/Documentation/remoteproc.txt
> +++ b/Documentation/remoteproc.txt
> @@ -314,6 +314,8 @@ Here are the various resource types that are currently supported::
> * @RSC_VDEV: declare support for a virtio device, and serve as its
> * virtio header.
> * @RSC_LAST: just keep this one at the end
> + * @RSC_VENDOR_START: start of the vendor specific resource types range
> + * @RSC_VENDOR_END: end of the vendor specific resource types range
> *
> * Please note that these values are used as indices to the rproc_handle_rsc
> * lookup table, so please keep them sane. Moreover, @RSC_LAST is used to
> @@ -321,11 +323,13 @@ Here are the various resource types that are currently supported::
> * please update it as needed.
> */
> enum fw_resource_type {
> - RSC_CARVEOUT = 0,
> - RSC_DEVMEM = 1,
> - RSC_TRACE = 2,
> - RSC_VDEV = 3,
> - RSC_LAST = 4,
> + RSC_CARVEOUT = 0,
> + RSC_DEVMEM = 1,
> + RSC_TRACE = 2,
> + RSC_VDEV = 3,
> + RSC_LAST = 4,
> + RSC_VENDOR_START = 128,
> + RSC_VENDOR_END = 512,
> };
>
> For more details regarding a specific resource type, please see its
> diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
> index 48feebd6d0a2..263e9c9614a8 100644
> --- a/drivers/remoteproc/remoteproc_core.c
> +++ b/drivers/remoteproc/remoteproc_core.c
> @@ -1066,6 +1066,20 @@ static int rproc_handle_resources(struct rproc *rproc,
>
> dev_dbg(dev, "rsc: type %d\n", hdr->type);
>
> + if (hdr->type >= RSC_VENDOR_START &&
> + hdr->type <= RSC_VENDOR_END) {
> + ret = rproc_handle_rsc(rproc, hdr->type, rsc,
> + offset + sizeof(*hdr), avail);
> + if (ret == RSC_HANDLED)
> + continue;
> + else if (ret < 0)
> + break;
> +
> + dev_warn(dev, "unsupported vendor resource %d\n",
> + hdr->type);
> + continue;
> + }
> +
> if (hdr->type >= RSC_LAST) {
> dev_warn(dev, "unsupported resource %d\n", hdr->type);
> continue;
> diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
> index 45ff76a06c72..4c77bdd517b9 100644
> --- a/drivers/remoteproc/remoteproc_internal.h
> +++ b/drivers/remoteproc/remoteproc_internal.h
> @@ -106,6 +106,17 @@ static inline int rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
> return 0;
> }
>
> +static inline
> +int rproc_handle_rsc(struct rproc *rproc, u32 rsc_type, void *rsc, int offset,
> + int avail)
> +{
> + if (rproc->ops->handle_rsc)
> + return rproc->ops->handle_rsc(rproc, rsc_type, rsc, offset,
> + avail);
> +
> + return RSC_IGNORED;
> +}
> +
> static inline
> struct resource_table *rproc_find_loaded_rsc_table(struct rproc *rproc,
> const struct firmware *fw)
> diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
> index 04d04709f2bd..16ad66683ad0 100644
> --- a/include/linux/remoteproc.h
> +++ b/include/linux/remoteproc.h
> @@ -100,7 +100,9 @@ struct fw_rsc_hdr {
> * the remote processor will be writing logs.
> * @RSC_VDEV: declare support for a virtio device, and serve as its
> * virtio header.
> - * @RSC_LAST: just keep this one at the end
> + * @RSC_LAST: just keep this one at the end of standard resources
> + * @RSC_VENDOR_START: start of the vendor specific resource types range
> + * @RSC_VENDOR_END: end of the vendor specific resource types range
> *
> * For more details regarding a specific resource type, please see its
> * dedicated structure below.
> @@ -111,11 +113,13 @@ struct fw_rsc_hdr {
> * please update it as needed.
> */
> enum fw_resource_type {
> - RSC_CARVEOUT = 0,
> - RSC_DEVMEM = 1,
> - RSC_TRACE = 2,
> - RSC_VDEV = 3,
> - RSC_LAST = 4,
> + RSC_CARVEOUT = 0,
> + RSC_DEVMEM = 1,
> + RSC_TRACE = 2,
> + RSC_VDEV = 3,
> + RSC_LAST = 4,
> + RSC_VENDOR_START = 128,
> + RSC_VENDOR_END = 512,
> };
>
> #define FW_RSC_ADDR_ANY (-1)
> @@ -339,6 +343,16 @@ struct rproc_mem_entry {
>
> struct firmware;
>
> +/**
> + * enum rsc_handling_status - return status of rproc_ops handle_rsc hook
> + * @RSC_HANDLED: resource was handled
> + * @RSC_IGNORED: resource was ignored
> + */
> +enum rsc_handling_status {
> + RSC_HANDLED = 0,
> + RSC_IGNORED = 1,
> +};
> +
> /**
> * struct rproc_ops - platform-specific device handlers
> * @start: power on the device and boot it
> @@ -346,6 +360,10 @@ struct firmware;
> * @kick: kick a virtqueue (virtqueue id given as a parameter)
> * @da_to_va: optional platform hook to perform address translations
> * @parse_fw: parse firmware to extract information (e.g. resource table)
> + * @handle_rsc: optional platform hook to handle vendor resources. Should return
> + * RSC_HANDLED if resource was handled, RSC_IGNORED if not handled and a
> + * negative value on error
> + * @load_rsc_table: load resource table from firmware image
> * @find_loaded_rsc_table: find the loaded resouce table
> * @load: load firmware to memory, where the remote processor
> * expects to find it
> @@ -358,6 +376,8 @@ struct rproc_ops {
> void (*kick)(struct rproc *rproc, int vqid);
> void * (*da_to_va)(struct rproc *rproc, u64 da, int len);
> int (*parse_fw)(struct rproc *rproc, const struct firmware *fw);
> + int (*handle_rsc)(struct rproc *rproc, u32 rsc_type, void *rsc,
> + int offset, int avail);
> struct resource_table *(*find_loaded_rsc_table)(
> struct rproc *rproc, const struct firmware *fw);
> int (*load)(struct rproc *rproc, const struct firmware *fw);
> --
> 2.15.0.276.g89ea799
>
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