drm/asahi: Implement ASAHI_BIND_SINGLE_PAGE (uapi)

Signed-off-by: Asahi Lina <lina@asahilina.net>

Author: hoshinolina

drivers/gpu/drm/asahi/file.rs

@@ -255,7 +255,8 @@ impl File {
 
             feat_compat: gpu.get_cfg().gpu_feat_compat
                 | hw::feat::compat::GETTIME
-                | hw::feat::compat::USER_TIMESTAMPS,
+                | hw::feat::compat::USER_TIMESTAMPS
+                | hw::feat::compat::SINGLE_PAGE_MAP,
             feat_incompat: gpu.get_cfg().gpu_feat_incompat,
 
             gpu_generation: gpu.get_dyncfg().id.gpu_gen as u32,
@@ -573,11 +574,16 @@ impl File {
             return Err(EINVAL); // Must be page aligned
         }
 
-        if (data.flags & !(uapi::ASAHI_BIND_READ | uapi::ASAHI_BIND_WRITE)) != 0 {
+        if (data.flags
+            & !(uapi::ASAHI_BIND_READ | uapi::ASAHI_BIND_WRITE | uapi::ASAHI_BIND_SINGLE_PAGE))
+            != 0
+        {
             cls_pr_debug!(Errors, "gem_bind: Invalid flags {:#x}\n", data.flags);
             return Err(EINVAL);
         }
 
+        let single_page = data.flags & uapi::ASAHI_BIND_SINGLE_PAGE != 0;
+
         let bo = gem::lookup_handle(file, data.handle)?;
 
         let start = data.addr;
@@ -637,7 +643,14 @@ impl File {
             return Err(EINVAL);
         }
 
-        vm.bind_object(&bo.gem, data.addr, data.range, data.offset, prot)?;
+        vm.bind_object(
+            &bo.gem,
+            data.addr,
+            data.range,
+            data.offset,
+            prot,
+            single_page,
+        )?;
 
         Ok(0)
     }

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

@@ -99,6 +99,9 @@ pub(crate) mod feat {
         /// User timestamps extension supported
         pub(crate) const USER_TIMESTAMPS: u64 =
             uapi::drm_asahi_feat_compat_DRM_ASAHI_FEAT_USER_TIMESTAMPS as u64;
+        /// User timestamps extension supported
+        pub(crate) const SINGLE_PAGE_MAP: u64 =
+            uapi::drm_asahi_feat_compat_DRM_ASAHI_FEAT_SINGLE_PAGE_MAP as u64;
     }
 
     /// Backwards-incompatible features.