File: | dev/pci/drm/i915/i915_utils.c |
Warning: | line 22, column 17 Value stored to 'kdev' during its initialization is never read |
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1 | // SPDX-License-Identifier: MIT |
2 | /* |
3 | * Copyright © 2019 Intel Corporation |
4 | */ |
5 | |
6 | #include <linux/device.h> |
7 | |
8 | #include <drm/drm_drv.h> |
9 | |
10 | #include "i915_drv.h" |
11 | #include "i915_utils.h" |
12 | |
13 | #include <sys/syslog.h> |
14 | |
15 | #define FDO_BUG_MSG"Please file a bug on drm/i915; see " "https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs" " for details." "Please file a bug on drm/i915; see " FDO_BUG_URL"https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs" " for details." |
16 | |
17 | void |
18 | __i915_printk(struct drm_i915_privateinteldrm_softc *dev_priv, const char *level, |
19 | const char *fmt, ...) |
20 | { |
21 | static bool_Bool shown_bug_once; |
22 | struct device *kdev = dev_priv->drm.dev; |
Value stored to 'kdev' during its initialization is never read | |
23 | bool_Bool is_error = level[1] <= KERN_ERR"\0013"[1]; |
24 | bool_Bool is_debug = level[1] == KERN_DEBUG"\0017"[1]; |
25 | struct va_format vaf; |
26 | va_list args; |
27 | |
28 | if (is_debug && !drm_debug_enabled(DRM_UT_DRIVER)drm_debug_enabled_raw(DRM_UT_DRIVER)) |
29 | return; |
30 | |
31 | va_start(args, fmt)__builtin_va_start((args), fmt); |
32 | |
33 | vaf.fmt = fmt; |
34 | vaf.va = &args; |
35 | |
36 | #ifdef __linux__ |
37 | if (is_error) |
38 | dev_printk(level, kdev, "%pV", &vaf)printf("drm:pid%d:%s *PRINTK* " "%pV", ({struct cpu_info *__ci ; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof (struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p-> ps_pid, __func__ , &vaf); |
39 | else |
40 | dev_printk(level, kdev, "[" DRM_NAME ":%ps] %pV",printf("drm:pid%d:%s *PRINTK* " "[" "drm" ":%ps] %pV", ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci ) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci; })->ci_curproc->p_p->ps_pid, __func__ , __builtin_return_address (0), &vaf) |
41 | __builtin_return_address(0), &vaf)printf("drm:pid%d:%s *PRINTK* " "[" "drm" ":%ps] %pV", ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci ) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci; })->ci_curproc->p_p->ps_pid, __func__ , __builtin_return_address (0), &vaf); |
42 | #else |
43 | if (!is_error) |
44 | printf("[" DRM_NAME"drm" "] "); |
45 | vprintf(fmt, args); |
46 | #endif |
47 | |
48 | va_end(args)__builtin_va_end((args)); |
49 | |
50 | if (is_error && !shown_bug_once) { |
51 | /* |
52 | * Ask the user to file a bug report for the error, except |
53 | * if they may have caused the bug by fiddling with unsafe |
54 | * module parameters. |
55 | */ |
56 | #ifdef __linux__ |
57 | if (!test_taint(TAINT_USER)) |
58 | dev_notice(kdev, "%s", FDO_BUG_MSG)printf("drm:pid%d:%s *NOTICE* " "%s", ({struct cpu_info *__ci ; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof (struct cpu_info, ci_self))); __ci;})->ci_curproc->p_p-> ps_pid, __func__ , "Please file a bug on drm/i915; see " "https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs" " for details."); |
59 | #endif |
60 | shown_bug_once = true1; |
61 | } |
62 | } |
63 | |
64 | void add_taint_for_CI(struct drm_i915_privateinteldrm_softc *i915, unsigned int taint) |
65 | { |
66 | __i915_printk(i915, KERN_NOTICE"\0015", "CI tainted:%#x by %pS\n", |
67 | taint, (void *)_RET_IP___builtin_return_address(0)); |
68 | |
69 | /* Failures that occur during fault injection testing are expected */ |
70 | if (!i915_error_injected()0) |
71 | __add_taint_for_CI(taint); |
72 | } |
73 | |
74 | #if IS_ENABLED(CONFIG_DRM_I915_DEBUG)0 |
75 | static unsigned int i915_probe_fail_count; |
76 | |
77 | int __i915_inject_probe_error(struct drm_i915_privateinteldrm_softc *i915, int err, |
78 | const char *func, int line) |
79 | { |
80 | if (i915_probe_fail_count >= i915_modparams.inject_probe_failure) |
81 | return 0; |
82 | |
83 | if (++i915_probe_fail_count < i915_modparams.inject_probe_failure) |
84 | return 0; |
85 | |
86 | __i915_printk(i915, KERN_INFO"\0016", |
87 | "Injecting failure %d at checkpoint %u [%s:%d]\n", |
88 | err, i915_modparams.inject_probe_failure, func, line); |
89 | i915_modparams.inject_probe_failure = 0; |
90 | return err; |
91 | } |
92 | |
93 | bool_Bool i915_error_injected(void) |
94 | { |
95 | return i915_probe_fail_count && !i915_modparams.inject_probe_failure; |
96 | } |
97 | |
98 | #endif |
99 | |
100 | void cancel_timer(struct timeout *t) |
101 | { |
102 | if (!timer_active(t)) |
103 | return; |
104 | |
105 | del_timer(t)timeout_del((t)); |
106 | WRITE_ONCE(t->to_time, 0)({ typeof(t->to_time) __tmp = (0); *(volatile typeof(t-> to_time) *)&(t->to_time) = __tmp; __tmp; }); |
107 | } |
108 | |
109 | void set_timer_ms(struct timeout *t, unsigned long timeout) |
110 | { |
111 | if (!timeout) { |
112 | cancel_timer(t); |
113 | return; |
114 | } |
115 | |
116 | timeout = msecs_to_jiffies(timeout)(((uint64_t)(timeout)) * hz / 1000); |
117 | |
118 | /* |
119 | * Paranoia to make sure the compiler computes the timeout before |
120 | * loading 'jiffies' as jiffies is volatile and may be updated in |
121 | * the background by a timer tick. All to reduce the complexity |
122 | * of the addition and reduce the risk of losing a jiffie. |
123 | */ |
124 | barrier()__asm volatile("" : : : "memory"); |
125 | |
126 | /* Keep t->expires = 0 reserved to indicate a canceled timer. */ |
127 | mod_timer(t, jiffies + timeout ?: 1); |
128 | } |
129 | |
130 | bool_Bool i915_vtd_active(struct drm_i915_privateinteldrm_softc *i915) |
131 | { |
132 | return false0; |
133 | #ifdef notyet |
134 | if (device_iommu_mapped(i915->drm.dev)) |
135 | return true1; |
136 | |
137 | /* Running as a guest, we assume the host is enforcing VT'd */ |
138 | return i915_run_as_guest(); |
139 | #endif |
140 | } |