Re: [RFC 5/6] remoteproc: Support custom firmware handlers
From: Ohad Ben-Cohen
Date: Sun Jun 03 2012 - 09:37:56 EST
On Tue, May 22, 2012 at 4:26 PM, <sjur.brandeland@xxxxxxxxxxxxxx> wrote:
> From: Sjur Brændeland <sjur.brandeland@xxxxxxxxxxxxxx>
>
> Make the firmware handling customizable by creating
> a rproc_fw_ops structure. Expose the existing
> Elf firmware handling in rproc_elf_fw_ops.
>
> Signed-off-by: Sjur Brændeland <sjur.brandeland@xxxxxxxxxxxxxx>
..
> @@ -171,6 +171,7 @@ static struct rproc_ops omap_rproc_ops = {
> .start = omap_rproc_start,
> .stop = omap_rproc_stop,
> .kick = omap_rproc_kick,
> + .fw = &rproc_elf_fw_ops
> };
Can we instead make these ops dynamically assigned, without mandating
them in the low level driver ?
E.g. with ELF it's easy (first four bytes of the binary), but I'm not
sure how feasible it is with proprietary binary formats (such as
yours).
> @@ -781,12 +780,13 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw)
> {
> struct device *dev = rproc->dev;
> const char *name = rproc->firmware;
> - struct elf32_hdr *ehdr;
> struct resource_table *table;
> int ret, tablesz;
>
> - ehdr = (struct elf32_hdr *)fw->data;
> -
> + if (!rproc->ops->fw_ops || !try_module_get(rproc->ops->fw_ops->owner)) {
I'm not sure we need loaders' ops to be full-fledged modules of their
own. For simplicity, we might just have them statically linked with
the remoteproc module.
> /* look for the resource table */
> - table = rproc_find_rsc_table(rproc, fw, &tablesz);
> + table = rproc->ops->fw_ops->find_rsc_table(rproc, fw, &tablesz);
Might be easier on the eyes if we turn rproc_find_rsc_table() (and
friends) into static inline "macros" which does all this
de-referencing.
Thanks,
Ohad.
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