On Tue 21 Apr 07:12 PDT 2020, Suman Anna wrote: > On 4/20/20 9:52 PM, Bjorn Andersson wrote: > > On Thu 16 Apr 17:20 PDT 2020, Suman Anna wrote: > > > > > From: Loic Pallardy <loic.pallardy@xxxxxx> > > > > > > On some SoC architecture, it is needed to enable HW like > > > clock, bus, regulator, memory region... before loading > > > co-processor firmware. > > > > > > This patch introduces prepare and unprepare ops to execute > > > platform specific function before firmware loading and after > > > stop execution. > > > > > > Signed-off-by: Loic Pallardy <loic.pallardy@xxxxxx> > > > Signed-off-by: Suman Anna <s-anna@xxxxxx> > > > Reviewed-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx> > > > Reviewed-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> > > > > Do we have an inbound user of these new oops? > > Yes, both the TI K3 R5F and DSP remoteproc drivers use these ops, the > patches are already on the lists. > Thanks for confirming Suman, I'll apply this. Regards, Bjorn > regards > Suman > > > > > Regards, > > Bjorn > > > > > --- > > > v1: > > > - Make the direct ops into inline helper functions in line > > > with the comments on the MCU sync series (v1 comments). > > > No change in functionality. > > > - Picked up the Reviewed-by tags > > > v0: https://patchwork.kernel.org/patch/11456383/ > > > > > > drivers/remoteproc/remoteproc_core.c | 15 ++++++++++++++- > > > drivers/remoteproc/remoteproc_internal.h | 16 ++++++++++++++++ > > > include/linux/remoteproc.h | 4 ++++ > > > 3 files changed, 34 insertions(+), 1 deletion(-) > > > > > > diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c > > > index d681eeb962b6..e38f627059ac 100644 > > > --- a/drivers/remoteproc/remoteproc_core.c > > > +++ b/drivers/remoteproc/remoteproc_core.c > > > @@ -1394,12 +1394,19 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw) > > > return ret; > > > } > > > + /* Prepare rproc for firmware loading if needed */ > > > + ret = rproc_prepare_device(rproc); > > > + if (ret) { > > > + dev_err(dev, "can't prepare rproc %s: %d\n", rproc->name, ret); > > > + goto disable_iommu; > > > + } > > > + > > > rproc->bootaddr = rproc_get_boot_addr(rproc, fw); > > > /* Load resource table, core dump segment list etc from the firmware */ > > > ret = rproc_parse_fw(rproc, fw); > > > if (ret) > > > - goto disable_iommu; > > > + goto unprepare_rproc; > > > /* reset max_notifyid */ > > > rproc->max_notifyid = -1; > > > @@ -1433,6 +1440,9 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw) > > > kfree(rproc->cached_table); > > > rproc->cached_table = NULL; > > > rproc->table_ptr = NULL; > > > +unprepare_rproc: > > > + /* release HW resources if needed */ > > > + rproc_unprepare_device(rproc); > > > disable_iommu: > > > rproc_disable_iommu(rproc); > > > return ret; > > > @@ -1838,6 +1848,9 @@ void rproc_shutdown(struct rproc *rproc) > > > /* clean up all acquired resources */ > > > rproc_resource_cleanup(rproc); > > > + /* release HW resources if needed */ > > > + rproc_unprepare_device(rproc); > > > + > > > rproc_disable_iommu(rproc); > > > /* Free the copy of the resource table */ > > > diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h > > > index b389dc79da81..101e6be8d240 100644 > > > --- a/drivers/remoteproc/remoteproc_internal.h > > > +++ b/drivers/remoteproc/remoteproc_internal.h > > > @@ -64,6 +64,22 @@ struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc, > > > struct rproc_mem_entry * > > > rproc_find_carveout_by_name(struct rproc *rproc, const char *name, ...); > > > +static inline int rproc_prepare_device(struct rproc *rproc) > > > +{ > > > + if (rproc->ops->prepare) > > > + return rproc->ops->prepare(rproc); > > > + > > > + return 0; > > > +} > > > + > > > +static inline int rproc_unprepare_device(struct rproc *rproc) > > > +{ > > > + if (rproc->ops->unprepare) > > > + return rproc->ops->unprepare(rproc); > > > + > > > + return 0; > > > +} > > > + > > > static inline > > > int rproc_fw_sanity_check(struct rproc *rproc, const struct firmware *fw) > > > { > > > diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h > > > index 38607107b7cb..b8481ac969f1 100644 > > > --- a/include/linux/remoteproc.h > > > +++ b/include/linux/remoteproc.h > > > @@ -355,6 +355,8 @@ enum rsc_handling_status { > > > /** > > > * struct rproc_ops - platform-specific device handlers > > > + * @prepare: prepare device for code loading > > > + * @unprepare: unprepare device after stop > > > * @start: power on the device and boot it > > > * @stop: power off the device > > > * @kick: kick a virtqueue (virtqueue id given as a parameter) > > > @@ -373,6 +375,8 @@ enum rsc_handling_status { > > > * panic at least the returned number of milliseconds > > > */ > > > struct rproc_ops { > > > + int (*prepare)(struct rproc *rproc); > > > + int (*unprepare)(struct rproc *rproc); > > > int (*start)(struct rproc *rproc); > > > int (*stop)(struct rproc *rproc); > > > void (*kick)(struct rproc *rproc, int vqid); > > > -- > > > 2.26.0 > > > >
