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Message-ID: <20160809124803.GC5243@dell>
Date: Tue, 9 Aug 2016 13:48:03 +0100
From: Lee Jones <lee.jones@...aro.org>
To: loic pallardy <loic.pallardy@...com>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
kernel@...inux.com, patrice.chotard@...com, ohad@...ery.com,
bjorn.andersson@...aro.org, linux-remoteproc@...r.kernel.org
Subject: Re: [PATCH 4/9] remoteproc: core: New API to add new resources to
the resource table
On Mon, 08 Aug 2016, loic pallardy wrote:
> Hi Lee,
>
> After splitting this patch in 2, it may be good to add a debugfs entry to
> display current rsc associated to one rproc.
Happy to take suggestions to add functionality, but I would like to
prevent *this* set from suffering from feature creep. Thus, I would
like to code-up your suggestion in a subsequent submission if it's all
the same to you.
> On 08/04/2016 11:21 AM, Lee Jones wrote:
> > In order to amend or add a new resource table entry we need a method
> > for a platform-specific to submit them. rproc_request_resource() is a
> > new public API which provides this functionality.
> >
> > It is to be called between rproc_alloc() and rproc_add().
> >
> > Signed-off-by: Lee Jones <lee.jones@...aro.org>
> > ---
> > drivers/remoteproc/remoteproc_core.c | 125 +++++++++++++++++++++++++++++++++++
> > include/linux/remoteproc.h | 21 ++++++
> > 2 files changed, 146 insertions(+)
> >
> > diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
> > index 4914482..0abfa2b 100644
> > --- a/drivers/remoteproc/remoteproc_core.c
> > +++ b/drivers/remoteproc/remoteproc_core.c
> > @@ -793,6 +793,130 @@ static void rproc_resource_cleanup(struct rproc *rproc)
> > }
> > }
> >
> > +static void rproc_dump_resource_table(struct rproc *rproc,
> > + struct resource_table *table, int size)
> > +{
> > + const char *types[] = {"carveout", "devmem", "trace", "vdev"};
> > + struct device *dev = &rproc->dev;
> > + struct fw_rsc_carveout *c;
> > + struct fw_rsc_devmem *d;
> > + struct fw_rsc_trace *t;
> > + struct fw_rsc_vdev *v;
> > + int i, j;
> > +
> > + if (!table) {
> > + dev_dbg(dev, "No resource table found\n");
> > + return;
> > + }
> > +
> > + dev_dbg(dev, "Resource Table: Version %d with %d entries [size: %x]\n",
> > + table->ver, table->num, size);
> > +
> > + for (i = 0; i < table->num; i++) {
> > + int offset = table->offset[i];
> > + struct fw_rsc_hdr *hdr = (void *)table + offset;
> > + void *rsc = (void *)hdr + sizeof(*hdr);
> > +
> > + switch (hdr->type) {
> > + case RSC_CARVEOUT:
> > + c = rsc;
> > + dev_dbg(dev, "Entry %d is of type %s\n", i, types[hdr->type]);
> > + dev_dbg(dev, " Device Address 0x%x\n", c->da);
> > + dev_dbg(dev, " Physical Address 0x%x\n", c->pa);
> > + dev_dbg(dev, " Length 0x%x Bytes\n", c->len);
> > + dev_dbg(dev, " Flags 0x%x\n", c->flags);
> > + dev_dbg(dev, " Reserved (should be zero) [%d]\n", c->reserved);
> > + dev_dbg(dev, " Name %s\n\n", c->name);
> > + break;
> > + case RSC_DEVMEM:
> > + d = rsc;
> > + dev_dbg(dev, "Entry %d is of type %s\n", i, types[hdr->type]);
> > + dev_dbg(dev, " Device Address 0x%x\n", d->da);
> > + dev_dbg(dev, " Physical Address 0x%x\n", d->pa);
> > + dev_dbg(dev, " Length 0x%x Bytes\n", d->len);
> > + dev_dbg(dev, " Flags 0x%x\n", d->flags);
> > + dev_dbg(dev, " Reserved (should be zero) [%d]\n", d->reserved);
> > + dev_dbg(dev, " Name %s\n\n", d->name);
> > + break;
> > + case RSC_TRACE:
> > + t = rsc;
> > + dev_dbg(dev, "Entry %d is of type %s\n", i, types[hdr->type]);
> > + dev_dbg(dev, " Device Address 0x%x\n", t->da);
> > + dev_dbg(dev, " Length 0x%x Bytes\n", t->len);
> > + dev_dbg(dev, " Reserved (should be zero) [%d]\n", t->reserved);
> > + dev_dbg(dev, " Name %s\n\n", t->name);
> > + break;
> > + case RSC_VDEV:
> > + v = rsc;
> > + dev_dbg(dev, "Entry %d is of type %s\n", i, types[hdr->type]);
> > +
> > + dev_dbg(dev, " ID %d\n", v->id);
> > + dev_dbg(dev, " Notify ID %d\n", v->notifyid);
> > + dev_dbg(dev, " Device features 0x%x\n", v->dfeatures);
> > + dev_dbg(dev, " Guest features 0x%x\n", v->gfeatures);
> > + dev_dbg(dev, " Config length 0x%x\n", v->config_len);
> > + dev_dbg(dev, " Status 0x%x\n", v->status);
> > + dev_dbg(dev, " Number of vrings %d\n", v->num_of_vrings);
> > + dev_dbg(dev, " Reserved (should be zero) [%d][%d]\n\n",
> > + v->reserved[0], v->reserved[1]);
> > +
> > + for (j = 0; j < v->num_of_vrings; j++) {
> > + dev_dbg(dev, " Vring %d\n", j);
> > + dev_dbg(dev, " Device Address 0x%x\n", v->vring[j].da);
> > + dev_dbg(dev, " Alignment %d\n", v->vring[j].align);
> > + dev_dbg(dev, " Number of buffers %d\n", v->vring[j].num);
> > + dev_dbg(dev, " Notify ID %d\n", v->vring[j].notifyid);
> > + dev_dbg(dev, " Reserved (should be zero) [%d]\n\n",
> > + v->vring[j].reserved);
> > + }
> > + break;
> > + default:
> > + dev_dbg(dev, "Invalid resource type found: %d [hdr: %p]\n",
> > + hdr->type, hdr);
> > + return;
> > + }
> > + }
> > +}
> > +
> > +int rproc_request_resource(struct rproc *rproc, u32 type, void *resource)
> > +{
> > + struct device *dev = &rproc->dev;
> > + struct rproc_request_resource *request;
> > + int size;
> > +
> > + request = devm_kzalloc(dev, sizeof(*request), GFP_KERNEL);
> > + if (!request)
> > + return -ENOMEM;
> > +
> > + switch (type) {
> > + case RSC_CARVEOUT:
> > + size = sizeof(struct fw_rsc_carveout);
> > + break;
> > + case RSC_DEVMEM:
> > + size = sizeof(struct fw_rsc_devmem);
> > + break;
> > + case RSC_TRACE:
> > + size = sizeof(struct fw_rsc_trace);
> > + break;
> > + default:
> > + dev_err(dev, "Unsupported resource type: %d\n", type);
> > + return -EINVAL;
> > + }
> > +
> > + request->resource = devm_kzalloc(dev, size, GFP_KERNEL);
> > + if (!request->resource)
> > + return -ENOMEM;
> > +
> > + memcpy(request->resource, resource, size);
> > + request->type = type;
> > + request->size = size;
> > +
> > + list_add_tail(&request->node, &rproc->override_resources);
> > +
> > + return 0;
> > +}
> > +EXPORT_SYMBOL(rproc_request_resource);
> > +
> > /*
> > * take a firmware and boot a remote processor with it.
> > */
> > @@ -1452,6 +1576,7 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
> > INIT_LIST_HEAD(&rproc->mappings);
> > INIT_LIST_HEAD(&rproc->traces);
> > INIT_LIST_HEAD(&rproc->rvdevs);
> > + INIT_LIST_HEAD(&rproc->override_resources);
> >
> > INIT_WORK(&rproc->crash_handler, rproc_crash_handler_work);
> > init_completion(&rproc->crash_comp);
> > diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
> > index 3608d20..c620177 100644
> > --- a/include/linux/remoteproc.h
> > +++ b/include/linux/remoteproc.h
> > @@ -323,6 +323,25 @@ struct rproc_mem_entry {
> > struct list_head node;
> > };
> >
> > +/**
> > + * struct rproc_requested_resources - add a resource to the resource table
> > + *
> > + * @resource: pointer to a 'struct fw_rsc_*' resource
> > + * @type: 'fw_resource_type' resource type
> > + * @size: size of resource
> > + * @node: list node
> > + *
> > + * Resources can be added by platform-specific rproc drivers calling
> > + * rproc_request_resource()
> > + *
> > + */
> > +struct rproc_request_resource {
> > + void *resource;
> > + u32 type;
> > + u32 size;
> > + struct list_head node;
> > +};
> > +
> > struct rproc;
> >
> > /**
> > @@ -429,6 +448,7 @@ struct rproc {
> > int num_traces;
> > struct list_head carveouts;
> > struct list_head mappings;
> > + struct list_head override_resources;
> > struct completion firmware_loading_complete;
> > u32 bootaddr;
> > struct list_head rvdevs;
> > @@ -487,6 +507,7 @@ struct rproc_vdev {
> > u32 rsc_offset;
> > };
> >
> > +int rproc_request_resource(struct rproc *rproc, u32 type, void *res);
> > struct rproc *rproc_alloc(struct device *dev, const char *name,
> > const struct rproc_ops *ops,
> > const char *firmware, int len);
> >
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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