1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
From ed8b98238061e6260ffaf507597e114a5a80ca4f Mon Sep 17 00:00:00 2001
From: Daniel Golle <daniel@makrotopia.org>
Date: Mon, 13 Oct 2025 01:32:22 +0100
Subject: [PATCH 2/2] panfrost: Enable cross-compilation of precompilers on
non-Linux hosts
This patch enables building Mesa's Panfrost precompilers on non-Linux
hosts (macOS, Windows, etc.) by introducing a stub kernel mode driver
interface when building without full driver support.
The main issue was that pan_texture.c now requires pan_desc.h, which
includes kmod/pan_kmod.h that depends on Linux-specific DRM headers
(drm.h, xf86drm.h). These headers are not available on non-Linux hosts,
preventing cross-compilation of the Panfrost shader precompilers.
Changes:
1. Created kmod/pan_kmod_stub.h with minimal type definitions needed
by pan_desc.h inline functions (pan_kmod_dev_props)
2. Modified pan_desc.h to conditionally include either the full kmod
header or the stub version based on PAN_KMOD_STUB define
3. Updated build system to:
- Skip building kmod/ subdirectory when not needed
- Exclude pan_desc.c, pan_mod.c, pan_props.c from builds without
driver support
- Add -DPAN_KMOD_STUB define for precompiler-only builds
- Conditionally link kmod library only when building full driver
4. Extended panfrost build to support with_drivers_clc for CLC
precompiler requirements
This allows building Panfrost precompilers for cross-compilation
scenarios without requiring a Linux host or DRM development headers,
while maintaining full backward compatibility for regular driver builds.
---
src/meson.build | 2 +-
src/panfrost/lib/kmod/pan_kmod_stub.h | 27 ++++++++++++++
src/panfrost/lib/meson.build | 51 ++++++++++++++++++++-------
src/panfrost/lib/pan_desc.h | 4 +++
src/panfrost/meson.build | 2 +-
5 files changed, 71 insertions(+), 15 deletions(-)
create mode 100644 src/panfrost/lib/kmod/pan_kmod_stub.h
--- a/src/meson.build
+++ b/src/meson.build
@@ -92,7 +92,7 @@ endif
if with_imagination_vk or with_tools.contains('imagination')
subdir('imagination')
endif
-if with_gallium_panfrost or with_gallium_lima or with_panfrost_vk or with_tools.contains('panfrost')
+if with_drivers_clc or with_gallium_panfrost or with_gallium_lima or with_panfrost_vk or with_tools.contains('panfrost')
subdir('panfrost')
endif
if with_microsoft_clc or with_gallium_d3d12 or with_spirv_to_dxil or with_microsoft_vk
--- /dev/null
+++ b/src/panfrost/lib/kmod/pan_kmod_stub.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright © 2025 Collabora, Ltd.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Stub definitions for pan_kmod types when building without full DRM support.
+ * This allows building the panfrost precompilers on non-Linux hosts.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+/* Minimal stub for pan_kmod_dev_props used by pan_desc.h and pan_image.h
+ * inline functions */
+struct pan_kmod_dev_props {
+ uint32_t gpu_id;
+ uint32_t max_threads_per_core;
+ uint32_t max_tasks_per_core;
+ uint32_t max_threads_per_wg;
+};
+
+#if defined(__cplusplus)
+} /* extern C */
+#endif
--- a/src/panfrost/lib/meson.build
+++ b/src/panfrost/lib/meson.build
@@ -2,7 +2,9 @@
# Copyright © 2019 Collabora
# SPDX-License-Identifier: MIT
-subdir('kmod')
+if with_gallium_panfrost or with_panfrost_vk
+ subdir('kmod')
+endif
pixel_format_versions = ['5', '6', '7', '9', '10', '12', '13']
libpanfrost_pixel_format = []
@@ -21,18 +23,23 @@ foreach ver : pixel_format_versions
endforeach
libpanfrost_per_arch = []
+libpanfrost_per_arch_files = [ 'pan_blend.c', 'pan_texture.c' ]
+libpanfrost_per_arch_c_args = []
+
+if with_gallium_panfrost or with_panfrost_vk
+ libpanfrost_per_arch_files += 'pan_desc.c'
+ libpanfrost_per_arch_files += 'pan_mod.c'
+else
+ # Building without full driver support (e.g., for precompilers only)
+ # Use stub kmod definitions to avoid requiring DRM headers
+ libpanfrost_per_arch_c_args += '-DPAN_KMOD_STUB'
+endif
foreach ver : ['4', '5', '6', '7', '9', '10', '12', '13']
libpanfrost_per_arch += static_library(
- 'pan-arch-v' + ver,
- [
- 'pan_blend.c',
- 'pan_desc.c',
- 'pan_mod.c',
- 'pan_texture.c',
- ],
+ 'pan-arch-v' + ver, libpanfrost_per_arch_files,
include_directories : [inc_include, inc_src, inc_panfrost],
- c_args : ['-DPAN_ARCH=' + ver],
+ c_args : ['-DPAN_ARCH=' + ver] + libpanfrost_per_arch_c_args,
gnu_symbol_visibility : 'hidden',
dependencies : [deps_for_libpanfrost, idep_nir],
)
@@ -48,26 +55,44 @@ libpanfrost_lib_files = files(
'pan_tiler.c',
'pan_layout.c',
'pan_scratch.c',
- 'pan_props.c',
'pan_util.c',
'pan_afbc.c',
)
+if with_gallium_panfrost or with_panfrost_vk
+ libpanfrost_lib_files += files('pan_props.c')
+endif
+
+libpanfrost_link_with = [libpanfrost_pixel_format, libpanfrost_per_arch]
+if with_gallium_panfrost or with_panfrost_vk
+ libpanfrost_link_with += libpankmod_lib
+endif
+
+libpanfrost_lib_c_args = [no_override_init_args]
+if not (with_gallium_panfrost or with_panfrost_vk)
+ libpanfrost_lib_c_args += '-DPAN_KMOD_STUB'
+endif
+
libpanfrost_lib = static_library(
'panfrost_lib',
[libpanfrost_lib_files, pan_packers],
include_directories : [inc_include, inc_src, inc_panfrost],
- c_args : [no_override_init_args],
+ c_args : libpanfrost_lib_c_args,
gnu_symbol_visibility : 'hidden',
dependencies: [dep_libdrm, idep_nir, idep_mesautil, libpanfrost_model_dep],
build_by_default : false,
- link_with: [libpanfrost_pixel_format, libpanfrost_per_arch, libpankmod_lib],
+ link_with: libpanfrost_link_with,
)
+libpanfrost_dependencies = [deps_for_libpanfrost, idep_nir]
+if with_gallium_panfrost or with_panfrost_vk
+ libpanfrost_dependencies = libpankmod_dep
+endif
+
libpanfrost_dep = declare_dependency(
link_with: [libpanfrost_lib, libpanfrost_decode, libpanfrost_compiler, libpanfrost_pixel_format, libpanfrost_per_arch],
include_directories: [inc_include, inc_src, inc_panfrost],
- dependencies: [deps_for_libpanfrost, libpankmod_dep, idep_nir],
+ dependencies: libpanfrost_dependencies,
)
if with_tests
--- a/src/panfrost/lib/pan_desc.h
+++ b/src/panfrost/lib/pan_desc.h
@@ -8,7 +8,11 @@
#include "genxml/gen_macros.h"
+#if defined(PAN_KMOD_STUB)
+#include "kmod/pan_kmod_stub.h"
+#else
#include "kmod/pan_kmod.h"
+#endif
#include "pan_image.h"
#include "pan_pool.h"
--- a/src/panfrost/meson.build
+++ b/src/panfrost/meson.build
@@ -14,7 +14,7 @@ subdir('shared')
subdir('model')
subdir('compiler')
-if with_gallium_panfrost or with_panfrost_vk or with_tools.contains('panfrost')
+if with_drivers_clc or with_gallium_panfrost or with_panfrost_vk or with_tools.contains('panfrost')
subdir('genxml')
subdir('lib')
subdir('clc')
--- a/src/panfrost/lib/pan_image.h
+++ b/src/panfrost/lib/pan_image.h
@@ -18,7 +18,11 @@
#include "pan_mod.h"
#include "pan_props.h"
+#if defined(PAN_KMOD_STUB)
+#include "kmod/pan_kmod_stub.h"
+#else
#include "kmod/pan_kmod.h"
+#endif
#include "util/log.h"
|
