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Date: Fri, 15 Jan 2021 03:28:23 +0000
From: Peng Fan <peng.fan@....com>
To: Mathieu Poirier <mathieu.poirier@...aro.org>
CC: "ohad@...ery.com" <ohad@...ery.com>,
"bjorn.andersson@...aro.org" <bjorn.andersson@...aro.org>,
"o.rempel@...gutronix.de" <o.rempel@...gutronix.de>,
"robh+dt@...nel.org" <robh+dt@...nel.org>,
"shawnguo@...nel.org" <shawnguo@...nel.org>,
"s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
"kernel@...gutronix.de" <kernel@...gutronix.de>,
"festevam@...il.com" <festevam@...il.com>,
dl-linux-imx <linux-imx@....com>,
"linux-remoteproc@...r.kernel.org" <linux-remoteproc@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"paul@...pouillou.net" <paul@...pouillou.net>,
"matthias.bgg@...il.com" <matthias.bgg@...il.com>,
"agross@...nel.org" <agross@...nel.org>,
"patrice.chotard@...com" <patrice.chotard@...com>
Subject: RE: [PATCH V6 07/10] remoteproc: imx_rproc: add i.MX specific parse
fw hook
> Subject: Re: [PATCH V6 07/10] remoteproc: imx_rproc: add i.MX specific
> parse fw hook
>
> On Tue, Jan 12, 2021 at 05:39:16PM +0800, peng.fan@....com wrote:
> > From: Peng Fan <peng.fan@....com>
> >
> > The hook is used to parse memory-regions and load resource table from
> > the address the remote processor published.
> >
> > Signed-off-by: Peng Fan <peng.fan@....com>
> > Reviewed-by: Richard Zhu <hongxing.zhu@....com>
> > Reviewed-by: Mathieu Poirier <mathieu.poirier@...aro.org>
> > ---
> > drivers/remoteproc/imx_rproc.c | 93
> > ++++++++++++++++++++++++++++++++++
> > 1 file changed, 93 insertions(+)
> >
> > diff --git a/drivers/remoteproc/imx_rproc.c
> > b/drivers/remoteproc/imx_rproc.c index 47fc1d06be6a..3c0075dc1787
> > 100644
> > --- a/drivers/remoteproc/imx_rproc.c
> > +++ b/drivers/remoteproc/imx_rproc.c
> > @@ -10,6 +10,7 @@
> > #include <linux/mfd/syscon.h>
> > #include <linux/module.h>
> > #include <linux/of_address.h>
> > +#include <linux/of_reserved_mem.h>
> > #include <linux/of_device.h>
> > #include <linux/platform_device.h>
> > #include <linux/regmap.h>
> > @@ -241,10 +242,102 @@ static void *imx_rproc_da_to_va(struct rproc
> *rproc, u64 da, size_t len, bool *i
> > return va;
> > }
> >
> > +static int imx_rproc_mem_alloc(struct rproc *rproc,
> > + struct rproc_mem_entry *mem) {
> > + struct device *dev = rproc->dev.parent;
> > + void *va;
> > +
> > + dev_dbg(dev, "map memory: %p+%zx\n", &mem->dma, mem->len);
> > + va = ioremap_wc(mem->dma, mem->len);
> > + if (IS_ERR_OR_NULL(va)) {
> > + dev_err(dev, "Unable to map memory region: %p+%zx\n",
> > + &mem->dma, mem->len);
> > + return -ENOMEM;
> > + }
> > +
> > + /* Update memory entry va */
> > + mem->va = va;
> > +
> > + return 0;
> > +}
> > +
> > +static int imx_rproc_mem_release(struct rproc *rproc,
> > + struct rproc_mem_entry *mem)
> > +{
> > + dev_dbg(rproc->dev.parent, "unmap memory: %pa\n", &mem->dma);
> > + iounmap(mem->va);
> > +
> > + return 0;
> > +}
> > +
> > +static int imx_rproc_parse_memory_regions(struct rproc *rproc) {
> > + struct imx_rproc *priv = rproc->priv;
> > + struct device_node *np = priv->dev->of_node;
> > + struct of_phandle_iterator it;
> > + struct rproc_mem_entry *mem;
> > + struct reserved_mem *rmem;
> > + u32 da;
> > +
> > + /* Register associated reserved memory regions */
> > + of_phandle_iterator_init(&it, np, "memory-region", NULL, 0);
> > + while (of_phandle_iterator_next(&it) == 0) {
> > + /*
> > + * Ignore the first memory region which will be used vdev buffer.
> > + * No need to do extra handlings, rproc_add_virtio_dev will handle
> it.
> > + */
> > + if (!strcmp(it.node->name, "vdevbuffer"))
>
> Because you are doing a V8, please use "vdev0buffer" and make the change in
> the .yaml file.
V7, I have not post out V7 yet.
Seems I forgot the change this to vdev0buffer, I recalled you have same comments
before.
Thanks,
Peng.
>
> > + continue;
> > +
> > + rmem = of_reserved_mem_lookup(it.node);
> > + if (!rmem) {
> > + dev_err(priv->dev, "unable to acquire memory-region\n");
> > + return -EINVAL;
> > + }
> > +
> > + /* No need to translate pa to da, i.MX use same map */
> > + da = rmem->base;
> > +
> > + /* Register memory region */
> > + mem = rproc_mem_entry_init(priv->dev, NULL,
> (dma_addr_t)rmem->base, rmem->size, da,
> > + imx_rproc_mem_alloc, imx_rproc_mem_release,
> > + it.node->name);
> > +
> > + if (mem)
> > + rproc_coredump_add_segment(rproc, da, rmem->size);
> > + else
> > + return -ENOMEM;
> > +
> > + rproc_add_carveout(rproc, mem);
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static int imx_rproc_parse_fw(struct rproc *rproc, const struct
> > +firmware *fw) {
> > + int ret = imx_rproc_parse_memory_regions(rproc);
> > +
> > + if (ret)
> > + return ret;
> > +
> > + ret = rproc_elf_load_rsc_table(rproc, fw);
> > + if (ret)
> > + dev_info(&rproc->dev, "No resource table in elf\n");
> > +
> > + return 0;
> > +}
> > +
> > static const struct rproc_ops imx_rproc_ops = {
> > .start = imx_rproc_start,
> > .stop = imx_rproc_stop,
> > .da_to_va = imx_rproc_da_to_va,
> > + .load = rproc_elf_load_segments,
> > + .parse_fw = imx_rproc_parse_fw,
> > + .find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
> > + .sanity_check = rproc_elf_sanity_check,
> > + .get_boot_addr = rproc_elf_get_boot_addr,
> > };
> >
> > static int imx_rproc_addr_init(struct imx_rproc *priv,
> > --
> > 2.28.0
> >
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