feat: add asahi types

Author: RossComputerGuy

libdrm/types.zig

@@ -3,6 +3,7 @@ const Allocator = std.mem.Allocator;
 const os = @import("os.zig");
 
 pub const amdgpu = @import("types/amdgpu.zig");
+pub const asahi = @import("types/asahi.zig");
 
 pub usingnamespace @import("types/base.zig");
 pub usingnamespace @import("types/gem.zig");

libdrm/types/asahi.zig

@@ -0,0 +1,68 @@
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+const os = @import("../os.zig");
+
+pub const ParamsGlobal = extern struct {
+    features: u64,
+    gpu_generation: u32,
+    gpu_variant: u32,
+    gpu_revision: u32,
+    chip_id: u32,
+    num_dies: u32,
+    num_clusters_total: u32,
+    num_cores_per_cluster: u32,
+    max_frequency_khz: u32,
+    core_masks: [64]u64,
+    vm_start: u64,
+    vm_end: u64,
+    vm_kernel_min_size: u64,
+    max_commands_per_submission: u32,
+    max_attachments: u32,
+    command_timestamp_frequency_hz: u64,
+};
+
+pub const GetParams = extern struct {
+    group: u32,
+    pad: u32 = 0,
+    pointer: u64,
+    size: u64,
+
+    pub const req = os.IOCTL.IOWR(0x40, GetParams);
+
+    pub fn get(self: *GetParams, fd: std.posix.fd_t) !void {
+        return switch (std.posix.errno(os.ioctl(fd, req, @intFromPtr(self)))) {
+            .SUCCESS => {},
+            .ACCES => error.AccessDenied,
+            .PERM => error.PermissionDenied,
+            .BADF => error.NotOpenForWriting,
+            .NOENT => error.NotFound,
+            .FAULT => unreachable,
+            .INVAL => unreachable,
+            .NOTTY => error.NotATerminal,
+            .OPNOTSUPP => error.NotSupported,
+            else => |e| std.posix.unexpectedErrno(e),
+        };
+    }
+};
+
+pub const GetTime = extern struct {
+    flags: u64 = 0,
+    gpu_timestamp: u64 = 0,
+
+    pub const req = os.IOCTL.IOWR(0x41, GetTime);
+
+    pub fn get(self: *GetTime, fd: std.posix.fd_t) !void {
+        return switch (std.posix.errno(os.ioctl(fd, req, @intFromPtr(self)))) {
+            .SUCCESS => {},
+            .ACCES => error.AccessDenied,
+            .PERM => error.PermissionDenied,
+            .BADF => error.NotOpenForWriting,
+            .NOENT => error.NotFound,
+            .FAULT => unreachable,
+            .INVAL => unreachable,
+            .NOTTY => error.NotATerminal,
+            .OPNOTSUPP => error.NotSupported,
+            else => |e| std.posix.unexpectedErrno(e),
+        };
+    }
+};