1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/gpu/nova-core/fb/hal.rs b/drivers/gpu/nova-core/fb/hal.rs
new file mode 100644
index 000000000000..2f914948bb9a
--- /dev/null
+++ b/drivers/gpu/nova-core/fb/hal.rs
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-2.0
+
+use kernel::prelude::*;
+
+use crate::driver::Bar0;
+use crate::gpu::Chipset;
+
+mod ga100;
+mod ga102;
+mod tu102;
+
+pub(crate) trait FbHal {
+    /// Returns the address of the currently-registered sysmem flush page.
+    fn read_sysmem_flush_page(&self, bar: &Bar0) -> u64;
+
+    /// Register `addr` as the address of the sysmem flush page.
+    ///
+    /// This might fail if the address is too large for the receiving register.
+    fn write_sysmem_flush_page(&self, bar: &Bar0, addr: u64) -> Result;
+
+    /// Returns `true` is display is supported.
+    fn supports_display(&self, bar: &Bar0) -> bool;
+
+    /// Returns the VRAM size, in bytes.
+    fn vidmem_size(&self, bar: &Bar0) -> u64;
+}
+
+/// Returns the HAL corresponding to `chipset`.
+pub(super) fn fb_hal(chipset: Chipset) -> &'static dyn FbHal {
+    use Chipset::*;
+
+    match chipset {
+        TU102 | TU104 | TU106 | TU117 | TU116 => tu102::TU102_HAL,
+        GA100 => ga100::GA100_HAL,
+        GA102 | GA103 | GA104 | GA106 | GA107 | AD102 | AD103 | AD104 | AD106 | AD107 => {
+            ga102::GA102_HAL
+        }
+    }
+}