net-nrf91: add nrf9151 support.

2 files changed, 42 insertions, 10 deletions

diff --git a/.github/ci/doc.sh b/.github/ci/doc.sh
index 58ffe5f2e..06c61f8c0 100755
--- a/.github/ci/doc.sh
+++ b/.github/ci/doc.sh
@@ -42,6 +42,7 @@ docserver-builder -i ./embassy-usb-logger -o webroot/crates/embassy-usb-logger/g
 docserver-builder -i ./embassy-usb-synopsys-otg -o webroot/crates/embassy-usb-synopsys-otg/git.zup
 
 docserver-builder -i ./embassy-net -o webroot/crates/embassy-net/git.zup
+docserver-builder -i ./embassy-net-nrf91 -o webroot/crates/embassy-net-nrf91/git.zup
 docserver-builder -i ./embassy-net-driver -o webroot/crates/embassy-net-driver/git.zup
 docserver-builder -i ./embassy-net-driver-channel -o webroot/crates/embassy-net-driver-channel/git.zup
 docserver-builder -i ./embassy-net-wiznet -o webroot/crates/embassy-net-wiznet/git.zup
diff --git a/embassy-net-nrf91/src/lib.rs b/embassy-net-nrf91/src/lib.rs
index 61fcaea1f..0bd9be0d9 100644
--- a/embassy-net-nrf91/src/lib.rs
+++ b/embassy-net-nrf91/src/lib.rs
@@ -119,14 +119,16 @@ async fn new_internal<'a>(
     let shmem_ptr = shmem.as_mut_ptr() as *mut u8;
 
     const SPU_REGION_SIZE: usize = 8192; // 8kb
-    assert!(shmem_len != 0);
+    trace!("  shmem_ptr = {}, shmem_len = {}", shmem_ptr, shmem_len);
+
+    assert!(shmem_len != 0, "shmem length must not be zero");
     assert!(
         shmem_len % SPU_REGION_SIZE == 0,
         "shmem length must be a multiple of 8kb"
     );
     assert!(
         (shmem_ptr as usize) % SPU_REGION_SIZE == 0,
-        "shmem length must be a multiple of 8kb"
+        "shmem pointer must be 8kb-aligned"
     );
     assert!(
         (shmem_ptr as usize + shmem_len) < 0x2002_0000,
@@ -135,8 +137,15 @@ async fn new_internal<'a>(
 
     let spu = pac::SPU_S;
     debug!("Setting IPC RAM as nonsecure...");
+    trace!(
+        "  SPU_REGION_SIZE={}, shmem_ptr=0x{:08X}, shmem_len={}",
+        SPU_REGION_SIZE,
+        shmem_ptr as usize,
+        shmem_len
+    );
     let region_start = (shmem_ptr as usize - 0x2000_0000) / SPU_REGION_SIZE;
     let region_end = region_start + shmem_len / SPU_REGION_SIZE;
+    trace!("  region_start={}, region_end={}", region_start, region_end);
     for i in region_start..region_end {
         spu.ramregion(i).perm().write(|w| {
             w.set_execute(true);
@@ -154,13 +163,18 @@ async fn new_internal<'a>(
         end: unsafe { shmem_ptr.add(shmem_len) },
         _phantom: PhantomData,
     };
-
-    let ipc = pac::IPC_NS;
-    let power = pac::POWER_S;
+    trace!(
+        "  Allocator: start=0x{:08X}, end=0x{:08X}",
+        alloc.start as usize,
+        alloc.end as usize
+    );
 
     let cb: &mut ControlBlock = alloc.alloc().write(unsafe { mem::zeroed() });
+
     let rx = alloc.alloc_bytes(RX_SIZE);
+    trace!("  RX buffer at {}, size={}", rx.as_ptr(), RX_SIZE);
     let trace = alloc.alloc_bytes(TRACE_SIZE);
+    trace!("  Trace buffer at {}, size={}", trace.as_ptr(), TRACE_SIZE);
 
     cb.version = 0x00010000;
     cb.rx_base = rx.as_mut_ptr() as _;
@@ -174,8 +188,10 @@ async fn new_internal<'a>(
     cb.trace.base = trace.as_mut_ptr() as _;
     cb.trace.size = TRACE_SIZE;
 
+    let ipc = pac::IPC_NS;
     ipc.gpmem(0).write_value(cb as *mut _ as u32);
     ipc.gpmem(1).write_value(0);
+    trace!("  GPMEM[0]={:#X}, GPMEM[1]={}", cb as *mut _ as u32, 0);
 
     // connect task/event i to channel i
     for i in 0..8 {
@@ -185,8 +201,9 @@ async fn new_internal<'a>(
 
     compiler_fence(Ordering::SeqCst);
 
+    let power = pac::POWER_S;
     // POWER.LTEMODEM.STARTN = 0
-    // The reg is missing in the PAC??
+    // TODO: The reg is missing in the PAC??
     let startn = unsafe { (power.as_ptr() as *mut u32).add(0x610 / 4) };
     unsafe { startn.write_volatile(0) }
 
@@ -202,6 +219,8 @@ async fn new_internal<'a>(
 
         rx_control_list: ptr::null_mut(),
         rx_data_list: ptr::null_mut(),
+        rx_control_len: 0,
+        rx_data_len: 0,
         rx_seq_no: 0,
         rx_check: PointerChecker {
             start: rx.as_mut_ptr() as *mut u8,
@@ -310,6 +329,10 @@ struct StateInner {
 
     rx_control_list: *mut List,
     rx_data_list: *mut List,
+    /// Number of entries in the control list
+    rx_control_len: usize,
+    /// Number of entries in the data list
+    rx_data_len: usize,
     rx_seq_no: u16,
     rx_check: PointerChecker,
 
@@ -346,8 +369,11 @@ impl StateInner {
                 self.rx_data_list = desc.data_list_ptr;
                 let rx_control_len = unsafe { addr_of!((*self.rx_control_list).len).read_volatile() };
                 let rx_data_len = unsafe { addr_of!((*self.rx_data_list).len).read_volatile() };
-                assert_eq!(rx_control_len, LIST_LEN);
-                assert_eq!(rx_data_len, LIST_LEN);
+
+                trace!("modem control list length: {}", rx_control_len);
+                trace!("modem data    list length: {}", rx_data_len);
+                self.rx_control_len = rx_control_len;
+                self.rx_data_len = rx_data_len;
                 self.init = true;
 
                 debug!("IPC initialized OK!");
@@ -463,7 +489,12 @@ impl StateInner {
 
     fn process(&mut self, list: *mut List, is_control: bool, ch: &mut ch::Runner<MTU>) -> bool {
         let mut did_work = false;
-        for i in 0..LIST_LEN {
+        let max = if is_control {
+            self.rx_control_len
+        } else {
+            self.rx_data_len
+        };
+        for i in 0..max {
             let item_ptr = unsafe { addr_of_mut!((*list).items[i]) };
             let preamble = unsafe { addr_of!((*item_ptr).state).read_volatile() };
             if preamble & 0xFF == 0x01 && preamble >> 16 == self.rx_seq_no as u32 {
@@ -947,7 +978,7 @@ impl<'a> Runner<'a> {
     }
 }
 
-const LIST_LEN: usize = 16;
+const LIST_LEN: usize = 32;
 
 #[repr(C)]
 struct ControlBlock {