From 227b876aa8929636f2a98b2b9459c7a4e55037e6 Mon Sep 17 00:00:00 2001
From: Matt Keeter <matt@oxide.computer>
Date: Tue, 21 Jan 2025 13:33:33 -0500
Subject: [PATCH] Load dummy packrat config for grapefruit

---
 Cargo.lock                            |  1 +
 app/grapefruit/app.toml               |  2 +-
 drv/grapefruit-seq-server/Cargo.toml  |  9 +++++----
 drv/grapefruit-seq-server/src/main.rs | 29 +++++++++++++++++++++++++++
 4 files changed, 36 insertions(+), 5 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index f116ae3ca..dfb8b9226 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1226,6 +1226,7 @@ dependencies = [
  "ringbuf",
  "sha3",
  "task-jefe-api",
+ "task-packrat-api",
  "userlib",
  "zerocopy 0.6.6",
 ]
diff --git a/app/grapefruit/app.toml b/app/grapefruit/app.toml
index 79cb2ec55..bdd34ea2c 100644
--- a/app/grapefruit/app.toml
+++ b/app/grapefruit/app.toml
@@ -177,7 +177,7 @@ priority = 4
 max-sizes = {flash = 131072, ram = 16384 }
 stacksize = 2600
 start = true
-task-slots = ["sys", {spi = "spi2_driver"}, "auxflash", "jefe"]
+task-slots = ["sys", {spi = "spi2_driver"}, "auxflash", "jefe", "packrat"]
 
 [tasks.thermal]
 name = "task-thermal"
diff --git a/drv/grapefruit-seq-server/Cargo.toml b/drv/grapefruit-seq-server/Cargo.toml
index dea4f786b..ca244e65d 100644
--- a/drv/grapefruit-seq-server/Cargo.toml
+++ b/drv/grapefruit-seq-server/Cargo.toml
@@ -4,13 +4,14 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-drv-spi-api = { path = "../spi-api" }
-drv-cpu-seq-api = { path = "../cpu-seq-api" }
+counters = { path = "../../lib/counters" }
+drv-auxflash-api = { path = "../auxflash-api" }
 drv-cpu-power-state = { path = "../cpu-power-state" }
+drv-cpu-seq-api = { path = "../cpu-seq-api" }
+drv-spi-api = { path = "../spi-api" }
 drv-stm32xx-sys-api = { path = "../stm32xx-sys-api" }
-drv-auxflash-api = { path = "../auxflash-api" }
-counters = { path = "../../lib/counters" }
 gnarle = { path = "../../lib/gnarle" }
+task-packrat-api = { path = "../../task/packrat-api" }
 ringbuf = { path = "../../lib/ringbuf" }
 userlib = { path = "../../sys/userlib", features = ["panic-messages"] }
 task-jefe-api = { path = "../../task/jefe-api" }
diff --git a/drv/grapefruit-seq-server/src/main.rs b/drv/grapefruit-seq-server/src/main.rs
index 5787e7cec..7decb50bc 100644
--- a/drv/grapefruit-seq-server/src/main.rs
+++ b/drv/grapefruit-seq-server/src/main.rs
@@ -13,6 +13,7 @@ use drv_stm32xx_sys_api as sys_api;
 use idol_runtime::{NotificationHandler, RequestError};
 use sha3::{Digest, Sha3_256};
 use task_jefe_api::Jefe;
+use task_packrat_api::{CacheSetError, MacAddressBlock, Packrat, VpdIdentity};
 use userlib::{
     hl, sys_recv_notification, task_slot, FromPrimitive, RecvMessage,
     UnwrapLite,
@@ -29,6 +30,8 @@ enum Trace {
     ContinueBitstreamLoad(usize),
     WaitForDone,
     Programmed,
+    MacsAlreadySet(MacAddressBlock),
+    IdentityAlreadySet(VpdIdentity),
 
     #[count(skip)]
     None,
@@ -48,6 +51,7 @@ counted_ringbuf!(Trace, 128, Trace::None);
 task_slot!(SYS, sys);
 task_slot!(SPI, spi);
 task_slot!(AUXFLASH, auxflash);
+task_slot!(PACKRAT, packrat);
 
 #[export_name = "main"]
 fn main() -> ! {
@@ -55,6 +59,31 @@ fn main() -> ! {
     let spi = drv_spi_api::Spi::from(SPI.get_task_id());
     let aux = drv_auxflash_api::AuxFlash::from(AUXFLASH.get_task_id());
 
+    // Populate packrat with dummy values, because talking to the EEPROM is hard
+    let packrat = Packrat::from(PACKRAT.get_task_id());
+    let macs = MacAddressBlock {
+        base_mac: [0; 6],
+        count: 0.into(),
+        stride: 0,
+    };
+    match packrat.set_mac_address_block(macs) {
+        Ok(()) => (),
+        Err(CacheSetError::ValueAlreadySet) => {
+            ringbuf_entry!(Trace::MacsAlreadySet(macs));
+        }
+    }
+    let identity = VpdIdentity {
+        serial: *b"GRAPEFRUIT ",
+        part_number: *b"913-0000083",
+        revision: 0,
+    };
+    match packrat.set_identity(identity) {
+        Ok(()) => (),
+        Err(CacheSetError::ValueAlreadySet) => {
+            ringbuf_entry!(Trace::IdentityAlreadySet(identity));
+        }
+    }
+
     match ServerImpl::init(&sys, spi, aux) {
         // Set up everything nicely, time to start serving incoming messages.
         Ok(mut server) => {