drm/asahi: Expose firmware version to userspace

Might be useful for something.

Signed-off-by: Asahi Lina <[email protected]>

Author: hoshinolina

drivers/gpu/drm/asahi/file.rs

@@ -245,12 +245,18 @@ impl File {
 
             result_render_size: core::mem::size_of::<uapi::drm_asahi_result_render>() as u32,
             result_compute_size: core::mem::size_of::<uapi::drm_asahi_result_compute>() as u32,
+
+            firmware_version: [0; 4],
         };
 
         for (i, mask) in gpu.get_dyncfg().id.core_masks.iter().enumerate() {
             *(params.core_masks.get_mut(i).ok_or(EIO)?) = (*mask).try_into()?;
         }
 
+        for i in 0..3 {
+            params.firmware_version[i] = *gpu.get_dyncfg().firmware_version.get(i).unwrap_or(&0);
+        }
+
         let size = core::mem::size_of::<uapi::drm_asahi_params_global>().min(data.size.try_into()?);
 
         // SAFETY: We only write to this userptr once, so there are no TOCTOU issues.

drivers/gpu/drm/asahi/gpu.rs

@@ -18,6 +18,7 @@ use core::time::Duration;
 use kernel::{
     c_str,
     delay::coarse_sleep,
+    device::RawDevice,
     error::code::*,
     macros::versions,
     prelude::*,
@@ -780,10 +781,13 @@ impl GpuManager::ver {
             return Err(EIO);
         }
 
+        let node = dev.of_node().ok_or(EIO)?;
+
         Ok(Box::try_new(hw::DynConfig {
             pwr: pwr_cfg,
             uat_ttb_base: uat.ttb_base(),
             id: gpu_id,
+            firmware_version: node.get_property(c_str!("apple,firmware-version"))?,
         })?)
     }
 

drivers/gpu/drm/asahi/hw/mod.rs

@@ -321,6 +321,8 @@ pub(crate) struct DynConfig {
     pub(crate) id: GpuIdConfig,
     /// Power calibration configuration for this specific chip/device.
     pub(crate) pwr: PwrConfig,
+    /// Firmware version.
+    pub(crate) firmware_version: Vec<u32>,
 }
 
 /// Specific GPU ID configuration fetched from SGX MMIO registers.