On 02/10/2023 16:04, Jiri Pirko wrote:
Mon, Oct 02, 2023 at 04:32:30PM CEST, arkadiusz.kubalewski@xxxxxxxxx wrote:
From: Vadim Fedorenko <vadim.fedorenko@xxxxxxxxx>
Sent: Wednesday, September 27, 2023 8:09 PM
On 27/09/2023 10:24, Arkadiusz Kubalewski wrote:
Add callback op (get) for pin-dpll phase-offset measurment.
Add callback ops (get/set) for pin signal phase adjustment.
Add min and max phase adjustment values to pin proprties.
Invoke get callbacks when filling up the pin details to provide user
with phase related attribute values.
Invoke phase-adjust set callback when phase-adjust value is provided for
pin-set request.
Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@xxxxxxxxx>
[...]
+static int
+dpll_pin_phase_adj_set(struct dpll_pin *pin, struct nlattr
*phase_adj_attr,
+ struct netlink_ext_ack *extack)
+{
+ struct dpll_pin_ref *ref;
+ unsigned long i;
+ s32 phase_adj;
+ int ret;
+
+ phase_adj = nla_get_s32(phase_adj_attr);
+ if (phase_adj > pin->prop->phase_range.max ||
+ phase_adj < pin->prop->phase_range.min) {
+ NL_SET_ERR_MSG(extack, "phase adjust value not supported");
+ return -EINVAL;
+ }
+ xa_for_each(&pin->dpll_refs, i, ref) {
+ const struct dpll_pin_ops *ops = dpll_pin_ops(ref);
+ struct dpll_device *dpll = ref->dpll;
+
+ if (!ops->phase_adjust_set)
+ return -EOPNOTSUPP;
I'm thinking about this part. We can potentially have dpll devices with
different expectations on phase adjustments, right? And if one of them
won't be able to adjust phase (or will fail in the next line), then
netlink will return EOPNOTSUPP while _some_ of the devices will be
adjusted. Doesn't look great. Can we think about different way to apply
the change?
Well makes sense to me.
Does following makes sense as a fix?
We would call op for all devices which has been provided with the op.
If device has no op -> add extack error, continue
Is it real to expect some of the device support this and others don't?
Is it true for ice?
If not, I would got for all-or-nothing here.
But nothing blocks vendors to provide such configuration. Should we
rollback the configuration? Otherwise we can easily make it
inconsistent.
I'm more thinking of checking if all the devices returned error (or
absence of operation callback) and then return error instead of 0 with
extack filled in.
If device fails to set -> add extack error, continue
Function always returns 0.
Thank you!
Arkadiusz
+ ret = ops->phase_adjust_set(pin,
+ dpll_pin_on_dpll_priv(dpll, pin),
+ dpll, dpll_priv(dpll), phase_adj,
+ extack);
+ if (ret)
+ return ret;
+ }
+ __dpll_pin_change_ntf(pin);
+
+ return 0;
+}
+
