Messages in this thread Patch in this message | | | From | Loic Pallardy <> | Subject | [PATCH v2 03/19] remoteproc: core: Add function to amend an existing resource table entry | Date | Wed, 31 Aug 2016 22:50:06 +0200 |
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From: Lee Jones <lee.jones@linaro.org>
Sometimes the firmware does not know best.
When a firmware is built, it can be loaded with a resource table, usually detailing shared; memory, virtual device, trace log information etc. However, some vendors require this hard-coded information to be amended with new/improved information obtained from Device Tree for instance.
Until now, no method exists which allows the resource table to be amended. The addition of this function changes that. It is now possible to pull in a resource table and amend it before it is finally shared with the remote device.
Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Loic Pallardy <loic.pallardy@st.com> --- drivers/remoteproc/remoteproc_core.c | 63 ++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+)
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 6c48c11..330ad4f 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -915,6 +915,69 @@ int rproc_request_resource(struct rproc *rproc, u32 type, void *resource) } EXPORT_SYMBOL(rproc_request_resource); +static int rproc_update_resource_table_entry(struct rproc *rproc, + struct rproc_request_resource *request, + struct resource_table *table, int size) +{ + struct fw_rsc_carveout *tblc, *newc; + struct fw_rsc_devmem *tbld, *newd; + struct fw_rsc_trace *tblt, *newt; + int updated = true; + int i; + + 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); + + if (request->type != hdr->type) + continue; + + switch (hdr->type) { + case RSC_CARVEOUT: + tblc = rsc; + newc = request->resource; + + if (strncmp(newc->name, tblc->name, + sizeof(*tblc->name))) + break; + + memcpy(tblc, newc, request->size); + + return updated; + case RSC_DEVMEM: + tbld = rsc; + newd = request->resource; + + if (strncmp(newd->name, tbld->name, + sizeof(*tbld->name))) + break; + + memcpy(tbld, newd, request->size); + + return updated; + case RSC_TRACE: + tblt = rsc; + newt = request->resource; + + if (strncmp(newt->name, tblt->name, + sizeof(*tblt->name))) + break; + + memcpy(tblt, newt, request->size); + + return updated; + default: + dev_err(&rproc->dev, + "Unsupported resource type: %d\n", + hdr->type); + return -EINVAL; + } + } + + return !updated; +} + /* * take a firmware and boot a remote processor with it. */ -- 1.9.1
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