| Message ID | 20220902124032.788488-5-sudeep.holla@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | firmware: arm_ffa: Refactoring and initial/minor v1.1 update | expand |
On Fri, Sep 2, 2022 at 2:40 PM Sudeep Holla <sudeep.holla@arm.com> wrote: > > Add support for FFA_FEATURES to discover properties supported at the > FF-A interface. This interface can be used to query: > - If an FF-A interface is implemented by the component at the higher EL, > - If an implemented FF-A interface also implements any optional features > described in its interface definition, and > - Any implementation details exported by an implemented FF-A interface > as described in its interface definition. > > Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> > --- > drivers/firmware/arm_ffa/driver.c | 26 ++++++++++++++++++++++++++ > 1 file changed, 26 insertions(+) Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org> > > diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c > index 04e7cbb1b9aa..81b8d578b6ea 100644 > --- a/drivers/firmware/arm_ffa/driver.c > +++ b/drivers/firmware/arm_ffa/driver.c > @@ -571,6 +571,32 @@ static int ffa_memory_reclaim(u64 g_handle, u32 flags) > return 0; > } > > +static int ffa_features(u32 func_feat_id, u32 input_props, > + u32 *if_props_1, u32 *if_props_2) > +{ > + ffa_value_t id; > + > + if (!ARM_SMCCC_IS_FAST_CALL(func_feat_id) && input_props) { > + pr_err("%s: Invalid Parameters: %x, %x", __func__, > + func_feat_id, input_props); > + return ffa_to_linux_errno(FFA_RET_INVALID_PARAMETERS); > + } > + > + invoke_ffa_fn((ffa_value_t){ > + .a0 = FFA_FEATURES, .a1 = func_feat_id, .a2 = input_props, > + }, &id); > + > + if (id.a0 == FFA_ERROR) > + return ffa_to_linux_errno((int)id.a2); > + > + if (if_props_1) > + *if_props_1 = id.a2; > + if (if_props_2) > + *if_props_2 = id.a3; > + > + return 0; > +} > + > static u32 ffa_api_version_get(void) > { > return drv_info->version; > -- > 2.37.3 >
diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index 04e7cbb1b9aa..81b8d578b6ea 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -571,6 +571,32 @@ static int ffa_memory_reclaim(u64 g_handle, u32 flags) return 0; } +static int ffa_features(u32 func_feat_id, u32 input_props, + u32 *if_props_1, u32 *if_props_2) +{ + ffa_value_t id; + + if (!ARM_SMCCC_IS_FAST_CALL(func_feat_id) && input_props) { + pr_err("%s: Invalid Parameters: %x, %x", __func__, + func_feat_id, input_props); + return ffa_to_linux_errno(FFA_RET_INVALID_PARAMETERS); + } + + invoke_ffa_fn((ffa_value_t){ + .a0 = FFA_FEATURES, .a1 = func_feat_id, .a2 = input_props, + }, &id); + + if (id.a0 == FFA_ERROR) + return ffa_to_linux_errno((int)id.a2); + + if (if_props_1) + *if_props_1 = id.a2; + if (if_props_2) + *if_props_2 = id.a3; + + return 0; +} + static u32 ffa_api_version_get(void) { return drv_info->version;
Add support for FFA_FEATURES to discover properties supported at the FF-A interface. This interface can be used to query: - If an FF-A interface is implemented by the component at the higher EL, - If an implemented FF-A interface also implements any optional features described in its interface definition, and - Any implementation details exported by an implemented FF-A interface as described in its interface definition. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> --- drivers/firmware/arm_ffa/driver.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+)