transceivers: convert to counted_ringbufs (#1780)

I'm going to use a `counted_ringbuf` in the `transceivers` task because
there is a lot of activity that happens, specifically in the UDP
handler. I also bumped up the size from 16 -> 32 of that one because
there's nearly constant activity and each UDP message involves at least
three entries.

Fixes #1778

Author: Aaron-Hartwig

Cargo.lock

@@ -5,6 +5,7 @@ authors = ["Aaron Hartwig <aaron@oxide.computer>"]
 edition = "2021"
 
 [dependencies]
+counters = { path = "../../lib/counters" }
 drv-fpga-api = { path = "../fpga-api" }
 drv-i2c-api = { path = "../i2c-api" }
 drv-i2c-devices = { path = "../i2c-devices" }

drv/transceivers-server/Cargo.toml

@@ -5,6 +5,13 @@
 #![no_std]
 #![no_main]
 
+use counters::Count;
+use idol_runtime::{NotificationHandler, RequestError};
+use multitimer::{Multitimer, Repeat};
+use ringbuf::*;
+use static_cell::ClaimOnceCell;
+use userlib::{sys_get_timer, task_slot, units::Celsius};
+
 use drv_fpga_api::FpgaError;
 use drv_i2c_devices::pca9956b::Error;
 use drv_sidecar_front_io::{
@@ -17,16 +24,12 @@ use drv_transceivers_api::{
     ModuleStatus, TransceiversError, NUM_PORTS, TRANSCEIVER_TEMPERATURE_SENSORS,
 };
 use enum_map::Enum;
-use idol_runtime::{NotificationHandler, RequestError};
-use multitimer::{Multitimer, Repeat};
-use ringbuf::*;
-use static_cell::ClaimOnceCell;
 use task_sensor_api::{NoData, Sensor};
 use task_thermal_api::{Thermal, ThermalError, ThermalProperties};
 use transceiver_messages::{
     message::LedState, mgmt::ManagementInterface, MAX_PACKET_SIZE,
 };
-use userlib::{sys_get_timer, task_slot, units::Celsius};
+
 use zerocopy::{AsBytes, FromBytes};
 
 mod udp; // UDP API is implemented in a separate file
@@ -41,10 +44,11 @@ task_slot!(SENSOR, sensor);
 include!(concat!(env!("OUT_DIR"), "/i2c_config.rs"));
 
 #[allow(dead_code)]
-#[derive(Copy, Clone, PartialEq, Eq)]
+#[derive(Copy, Clone, PartialEq, Eq, Count)]
 enum Trace {
+    #[count(skip)]
     None,
-    FrontIOBoardReady(bool),
+    FrontIOBoardReady(#[count(children)] bool),
     FrontIOSeqErr(SeqError),
     LEDInit,
     LEDInitComplete,
@@ -55,7 +59,7 @@ enum Trace {
     LEDReadError(Error),
     LEDUpdateError(Error),
     ModulePresenceUpdate(LogicalPortMask),
-    TransceiversError(TransceiversError),
+    TransceiversError(#[count(children)] TransceiversError),
     GotInterface(u8, ManagementInterface),
     UnknownInterface(u8, ManagementInterface),
     UnpluggedModule(usize),
@@ -70,7 +74,8 @@ enum Trace {
     DisableFailed(usize, LogicalPortMask),
     ClearDisabledPorts(LogicalPortMask),
 }
-ringbuf!(Trace, 16, Trace::None);
+
+counted_ringbuf!(Trace, 16, Trace::None);
 
 ////////////////////////////////////////////////////////////////////////////////
 

drv/transceivers-server/src/main.rs

@@ -10,26 +10,30 @@
 //!
 //! All of the API types in `transceiver_messages` operate on **physical**
 //! ports, i.e. an FPGA paired by a physical port index (or mask).
+//!
+use counters::Count;
+use hubpack::SerializedSize;
+use ringbuf::*;
+use userlib::UnwrapLite;
+
 use crate::{FrontIOStatus, ServerImpl};
 use drv_sidecar_front_io::transceivers::{
     FpgaI2CFailure, LogicalPort, LogicalPortFailureTypes, LogicalPortMask,
     ModuleResult, ModuleResultNoFailure, ModuleResultSlim, PortI2CStatus,
 };
-use hubpack::SerializedSize;
-use ringbuf::*;
 use task_net_api::*;
 use transceiver_messages::{
     mac::MacAddrs,
     message::*,
     mgmt::{ManagementInterface, MemoryRead, MemoryWrite, Page},
     ModuleId,
 };
-use userlib::UnwrapLite;
 
 ////////////////////////////////////////////////////////////////////////////////
 
-#[derive(Copy, Clone, PartialEq)]
+#[derive(Copy, Clone, PartialEq, Count)]
 enum Trace {
+    #[count(skip)]
     None,
     DeserializeError(hubpack::Error),
     DeserializeHeaderError(hubpack::Error),
@@ -63,7 +67,7 @@ enum Trace {
     WriteI2CFailures(LogicalPort, FpgaI2CFailure),
 }
 
-ringbuf!(Trace, 16, Trace::None);
+counted_ringbuf!(Trace, 32, Trace::None);
 
 ////////////////////////////////////////////////////////////////////////////////
 #[derive(Copy, Clone, PartialEq)]