Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: MIT
2/*
3 * Copyright © 2021 Intel Corporation
4 */
5
6#include "xe_module.h"
7
8#include <linux/init.h>
9#include <linux/module.h>
10
11#include <drm/drm_module.h>
12
13#include "xe_drv.h"
14#include "xe_configfs.h"
15#include "xe_hw_fence.h"
16#include "xe_pci.h"
17#include "xe_pm.h"
18#include "xe_observation.h"
19#include "xe_sched_job.h"
20
21#if IS_ENABLED(CONFIG_DRM_XE_DEBUG)
22#define DEFAULT_GUC_LOG_LEVEL 3
23#else
24#define DEFAULT_GUC_LOG_LEVEL 1
25#endif
26
27#define DEFAULT_PROBE_DISPLAY true
28#define DEFAULT_VRAM_BAR_SIZE 0
29#define DEFAULT_FORCE_PROBE CONFIG_DRM_XE_FORCE_PROBE
30#define DEFAULT_MAX_VFS ~0
31#define DEFAULT_MAX_VFS_STR "unlimited"
32#define DEFAULT_WEDGED_MODE 1
33#define DEFAULT_SVM_NOTIFIER_SIZE 512
34
35struct xe_modparam xe_modparam = {
36 .probe_display = DEFAULT_PROBE_DISPLAY,
37 .guc_log_level = DEFAULT_GUC_LOG_LEVEL,
38 .force_probe = DEFAULT_FORCE_PROBE,
39#ifdef CONFIG_PCI_IOV
40 .max_vfs = DEFAULT_MAX_VFS,
41#endif
42 .wedged_mode = DEFAULT_WEDGED_MODE,
43 .svm_notifier_size = DEFAULT_SVM_NOTIFIER_SIZE,
44 /* the rest are 0 by default */
45};
46
47module_param_named(svm_notifier_size, xe_modparam.svm_notifier_size, uint, 0600);
48MODULE_PARM_DESC(svm_notifier_size, "Set the svm notifier size in MiB, must be power of 2 "
49 "[default=" __stringify(DEFAULT_SVM_NOTIFIER_SIZE) "]");
50
51module_param_named_unsafe(force_execlist, xe_modparam.force_execlist, bool, 0444);
52MODULE_PARM_DESC(force_execlist, "Force Execlist submission");
53
54module_param_named(probe_display, xe_modparam.probe_display, bool, 0444);
55MODULE_PARM_DESC(probe_display, "Probe display HW, otherwise it's left untouched "
56 "[default=" __stringify(DEFAULT_PROBE_DISPLAY) "])");
57
58module_param_named(vram_bar_size, xe_modparam.force_vram_bar_size, int, 0600);
59MODULE_PARM_DESC(vram_bar_size, "Set the vram bar size in MiB (<0=disable-resize, 0=max-needed-size, >0=force-size "
60 "[default=" __stringify(DEFAULT_VRAM_BAR_SIZE) "])");
61
62module_param_named(guc_log_level, xe_modparam.guc_log_level, int, 0600);
63MODULE_PARM_DESC(guc_log_level, "GuC firmware logging level (0=disable, 1=normal, 2..5=verbose-levels "
64 "[default=" __stringify(DEFAULT_GUC_LOG_LEVEL) "])");
65
66module_param_named_unsafe(guc_firmware_path, xe_modparam.guc_firmware_path, charp, 0400);
67MODULE_PARM_DESC(guc_firmware_path,
68 "GuC firmware path to use instead of the default one");
69
70module_param_named_unsafe(huc_firmware_path, xe_modparam.huc_firmware_path, charp, 0400);
71MODULE_PARM_DESC(huc_firmware_path,
72 "HuC firmware path to use instead of the default one - empty string disables");
73
74module_param_named_unsafe(gsc_firmware_path, xe_modparam.gsc_firmware_path, charp, 0400);
75MODULE_PARM_DESC(gsc_firmware_path,
76 "GSC firmware path to use instead of the default one - empty string disables");
77
78module_param_named_unsafe(force_probe, xe_modparam.force_probe, charp, 0400);
79MODULE_PARM_DESC(force_probe,
80 "Force probe options for specified devices. See CONFIG_DRM_XE_FORCE_PROBE for details "
81 "[default=" DEFAULT_FORCE_PROBE "])");
82
83#ifdef CONFIG_PCI_IOV
84module_param_named(max_vfs, xe_modparam.max_vfs, uint, 0400);
85MODULE_PARM_DESC(max_vfs,
86 "Limit number of Virtual Functions (VFs) that could be managed. "
87 "(0=no VFs; N=allow up to N VFs "
88 "[default=" DEFAULT_MAX_VFS_STR "])");
89#endif
90
91module_param_named_unsafe(wedged_mode, xe_modparam.wedged_mode, int, 0600);
92MODULE_PARM_DESC(wedged_mode,
93 "Module's default policy for the wedged mode (0=never, 1=upon-critical-errors, 2=upon-any-hang "
94 "[default=" __stringify(DEFAULT_WEDGED_MODE) "])");
95
96static int xe_check_nomodeset(void)
97{
98 if (drm_firmware_drivers_only())
99 return -ENODEV;
100
101 return 0;
102}
103
104struct init_funcs {
105 int (*init)(void);
106 void (*exit)(void);
107};
108
109static const struct init_funcs init_funcs[] = {
110 {
111 .init = xe_check_nomodeset,
112 },
113 {
114 .init = xe_configfs_init,
115 .exit = xe_configfs_exit,
116 },
117 {
118 .init = xe_hw_fence_module_init,
119 .exit = xe_hw_fence_module_exit,
120 },
121 {
122 .init = xe_sched_job_module_init,
123 .exit = xe_sched_job_module_exit,
124 },
125 {
126 .init = xe_register_pci_driver,
127 .exit = xe_unregister_pci_driver,
128 },
129 {
130 .init = xe_observation_sysctl_register,
131 .exit = xe_observation_sysctl_unregister,
132 },
133 {
134 .init = xe_pm_module_init,
135 },
136};
137
138static int __init xe_call_init_func(const struct init_funcs *func)
139{
140 if (func->init)
141 return func->init();
142 return 0;
143}
144
145static void xe_call_exit_func(const struct init_funcs *func)
146{
147 if (func->exit)
148 func->exit();
149}
150
151static int __init xe_init(void)
152{
153 int err, i;
154
155 for (i = 0; i < ARRAY_SIZE(init_funcs); i++) {
156 err = xe_call_init_func(init_funcs + i);
157 if (err) {
158 pr_info("%s: module_init aborted at %ps %pe\n",
159 DRIVER_NAME, init_funcs[i].init, ERR_PTR(err));
160 while (i--)
161 xe_call_exit_func(init_funcs + i);
162 return err;
163 }
164 }
165
166 return 0;
167}
168
169static void __exit xe_exit(void)
170{
171 int i;
172
173 for (i = ARRAY_SIZE(init_funcs) - 1; i >= 0; i--)
174 xe_call_exit_func(init_funcs + i);
175}
176
177module_init(xe_init);
178module_exit(xe_exit);
179
180MODULE_AUTHOR("Intel Corporation");
181
182MODULE_DESCRIPTION(DRIVER_DESC);
183MODULE_LICENSE("GPL and additional rights");