| Message ID | 1532697292-14272-8-git-send-email-loic.pallardy@st.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | remoteproc: add fixed memory region support | expand |
Hi Loic, On 7/27/18 8:14 AM, Loic Pallardy wrote: > This patch provides a new function to find a carveout according > to a name. > If match found, this function returns a pointer on the corresponding > carveout (rproc_mem_entry structure). > > Signed-off-by: Loic Pallardy <loic.pallardy@st.com> > --- > drivers/remoteproc/remoteproc_core.c | 42 ++++++++++++++++++++++++++++++++++++ > 1 file changed, 42 insertions(+) > > diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c > index fe6c4e4..77b39ba 100644 > --- a/drivers/remoteproc/remoteproc_core.c > +++ b/drivers/remoteproc/remoteproc_core.c > @@ -217,6 +217,48 @@ void *rproc_da_to_va(struct rproc *rproc, u64 da, int len) > } > EXPORT_SYMBOL(rproc_da_to_va); > > +/** > + * rproc_find_carveout_by_name() - lookup the carveout region by a name > + * @rproc: handle of a remote processor > + * @name,..: carveout name to find (standard printf format) > + * > + * Platform driver has the capability to register some pre-allacoted carveout %s/pre-allacoted/pre-allocated/ > + * (physically contiguous memory regions) before rproc firmware loading and > + * associated resource table analysis. These regions may be dedicated memory > + * regions internal to the coprocessor or specified DDR region with specific I guess this is the part that perhaps was being thought of for representing internal memories as well for removing the da_to_va ops right. Question is how to handle the different alias views for the same address space. Anyway, that is perhaps a discussion for later given that the current series does not remove the ops. > + * attributes > + * > + * This function is a helper function with which we can go over the > + * allocated carveouts and return associated region characteristics like > + * coprocessor address, length or processor virtual address. > + * > + * Return: a valid pointer on carveout entry on success or NULL on failure. > + */ > +struct rproc_mem_entry * > +rproc_find_carveout_by_name(struct rproc *rproc, const char *name, ...) > +{ > + va_list args; > + char _name[32]; > + struct rproc_mem_entry *carveout, *mem = NULL; > + > + if (!name) > + return NULL; > + > + va_start(args, name); > + vsnprintf(_name, sizeof(_name), name, args); > + va_end(args); > + > + list_for_each_entry(carveout, &rproc->carveouts, node) { > + /* Compare carveout and requested names */ > + if (!strcmp(carveout->name, _name)) { > + mem = carveout; Bjorn had some comments on v3 about returning carveout directly here instead of break, avoids the mem variable. I am ok either way. regards Suman > + break; > + } > + } > + > + return mem; > +} > + > int rproc_alloc_vring(struct rproc_vdev *rvdev, int i) > { > struct rproc *rproc = rvdev->rproc; >
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index fe6c4e4..77b39ba 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -217,6 +217,48 @@ void *rproc_da_to_va(struct rproc *rproc, u64 da, int len) } EXPORT_SYMBOL(rproc_da_to_va); +/** + * rproc_find_carveout_by_name() - lookup the carveout region by a name + * @rproc: handle of a remote processor + * @name,..: carveout name to find (standard printf format) + * + * Platform driver has the capability to register some pre-allacoted carveout + * (physically contiguous memory regions) before rproc firmware loading and + * associated resource table analysis. These regions may be dedicated memory + * regions internal to the coprocessor or specified DDR region with specific + * attributes + * + * This function is a helper function with which we can go over the + * allocated carveouts and return associated region characteristics like + * coprocessor address, length or processor virtual address. + * + * Return: a valid pointer on carveout entry on success or NULL on failure. + */ +struct rproc_mem_entry * +rproc_find_carveout_by_name(struct rproc *rproc, const char *name, ...) +{ + va_list args; + char _name[32]; + struct rproc_mem_entry *carveout, *mem = NULL; + + if (!name) + return NULL; + + va_start(args, name); + vsnprintf(_name, sizeof(_name), name, args); + va_end(args); + + list_for_each_entry(carveout, &rproc->carveouts, node) { + /* Compare carveout and requested names */ + if (!strcmp(carveout->name, _name)) { + mem = carveout; + break; + } + } + + return mem; +} + int rproc_alloc_vring(struct rproc_vdev *rvdev, int i) { struct rproc *rproc = rvdev->rproc;
This patch provides a new function to find a carveout according to a name. If match found, this function returns a pointer on the corresponding carveout (rproc_mem_entry structure). Signed-off-by: Loic Pallardy <loic.pallardy@st.com> --- drivers/remoteproc/remoteproc_core.c | 42 ++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+)