diff --git a/libportability-gfx/src/conv.rs b/libportability-gfx/src/conv.rs
index c10dacb..3de0c87 100644
--- a/libportability-gfx/src/conv.rs
+++ b/libportability-gfx/src/conv.rs
@@ -1,4 +1,4 @@
-use hal::{adapter, buffer, command, format, image, memory, pass, pso, window};
+use hal::{buffer, command, error, format, image, memory, pass, pso, window};
 use hal::{PatchSize, Primitive};
 
 use std::mem;
@@ -355,8 +355,8 @@ pub fn map_pipeline_stage_flags(stages: VkPipelineStageFlags) -> pso::PipelineSt
     }
 }
 
-pub fn map_err_device_creation(err: adapter::DeviceCreationError) -> VkResult {
-    use hal::adapter::DeviceCreationError::*;
+pub fn map_err_device_creation(err: error::DeviceCreationError) -> VkResult {
+    use hal::error::DeviceCreationError::*;
 
     match err {
         OutOfHostMemory => VkResult::VK_ERROR_OUT_OF_HOST_MEMORY,
@@ -523,3 +523,9 @@ pub fn map_blend_op(
 ) -> pso::BlendOp {
     unimplemented!()
 }
+
+#[inline]
+pub fn map_cmd_buffer_usage(flags: VkCommandBufferUsageFlags) -> command::CommandBufferFlags {
+    // Vulkan and HAL flags are equal
+    unsafe { mem::transmute(flags as u16) }
+}
diff --git a/libportability-gfx/src/impls.rs b/libportability-gfx/src/impls.rs
index feb4dee..5d77e9c 100644
--- a/libportability-gfx/src/impls.rs
+++ b/libportability-gfx/src/impls.rs
@@ -5,7 +5,7 @@ use hal::{
 };
 use hal::device::WaitFor;
 use hal::pool::RawCommandPool;
-use hal::command::{ClearValueRaw, RawCommandBuffer, Rect, Viewport};
+use hal::command::{ClearValueRaw, RawCommandBuffer, RawLevel, Rect, Viewport};
 use hal::queue::RawCommandQueue;
 
 use std::ffi::{CStr, CString};
@@ -1934,13 +1934,15 @@ pub extern "C" fn gfxAllocateCommandBuffers(
     pCommandBuffers: *mut VkCommandBuffer,
 ) -> VkResult {
     let info = unsafe { &mut *(pAllocateInfo as *mut VkCommandBufferAllocateInfo) };
-    assert_eq!(
-        info.level,
-        VkCommandBufferLevel::VK_COMMAND_BUFFER_LEVEL_PRIMARY
-    ); //TODO
+    let level = match info.level {
+        VkCommandBufferLevel::VK_COMMAND_BUFFER_LEVEL_PRIMARY => RawLevel::Primary,
+        VkCommandBufferLevel::VK_COMMAND_BUFFER_LEVEL_SECONDARY => RawLevel::Secondary,
+        level => panic!("Unexpected command buffer lvel: {:?}", level),
+    };
+
     let count = info.commandBufferCount as usize;
 
-    let cmd_bufs = info.commandPool.allocate(count);
+    let cmd_bufs = info.commandPool.allocate(count, level);
 
     let output = unsafe { slice::from_raw_parts_mut(pCommandBuffers, count) };
     for (out, cmd_buf) in output.iter_mut().zip(cmd_bufs) {
@@ -1968,9 +1970,7 @@ pub extern "C" fn gfxBeginCommandBuffer(
     mut commandBuffer: VkCommandBuffer,
     pBeginInfo: *const VkCommandBufferBeginInfo,
 ) -> VkResult {
-    assert_eq!(unsafe { (*pBeginInfo).flags }, 0); // TODO
-
-    commandBuffer.begin();
+    commandBuffer.begin(conv::map_cmd_buffer_usage(unsafe { (*pBeginInfo).flags }));
 
     VkResult::VK_SUCCESS
 }