1 /*
2 * Copyright © 2014-2017 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 *
23 */
24
25 #ifndef _INTEL_GUC_LOG_H_
26 #define _INTEL_GUC_LOG_H_
27
28 #include <linux/mutex.h>
29 #include <linux/relay.h>
30 #include <linux/workqueue.h>
31
32 #include "intel_guc_fwif.h"
33 #include "i915_gem.h"
34
35 struct intel_guc;
36
37 #ifdef CONFIG_DRM_I915_DEBUG_GUC
38 #define CRASH_BUFFER_SIZE SZ_2M
39 #define DPC_BUFFER_SIZE SZ_8M
40 #define ISR_BUFFER_SIZE SZ_8M
41 #else
42 #define CRASH_BUFFER_SIZE SZ_8K
43 #define DPC_BUFFER_SIZE SZ_32K
44 #define ISR_BUFFER_SIZE SZ_32K
45 #endif
46
47 /*
48 * While we're using plain log level in i915, GuC controls are much more...
49 * "elaborate"? We have a couple of bits for verbosity, separate bit for actual
50 * log enabling, and separate bit for default logging - which "conveniently"
51 * ignores the enable bit.
52 */
53 #define GUC_LOG_LEVEL_DISABLED 0
54 #define GUC_LOG_LEVEL_NON_VERBOSE 1
55 #define GUC_LOG_LEVEL_IS_ENABLED(x) ((x) > GUC_LOG_LEVEL_DISABLED)
56 #define GUC_LOG_LEVEL_IS_VERBOSE(x) ((x) > GUC_LOG_LEVEL_NON_VERBOSE)
57 #define GUC_LOG_LEVEL_TO_VERBOSITY(x) ({ \
58 typeof(x) _x = (x); \
59 GUC_LOG_LEVEL_IS_VERBOSE(_x) ? _x - 2 : 0; \
60 })
61 #define GUC_VERBOSITY_TO_LOG_LEVEL(x) ((x) + 2)
62 #define GUC_LOG_LEVEL_MAX GUC_VERBOSITY_TO_LOG_LEVEL(GUC_LOG_VERBOSITY_MAX)
63
64 struct intel_guc_log {
65 u32 level;
66 struct i915_vma *vma;
67 struct {
68 void *buf_addr;
69 struct workqueue_struct *flush_wq;
70 struct work_struct flush_work;
71 struct rchan *channel;
72 struct mutex lock;
73 u32 full_count;
74 } relay;
75 /* logging related stats */
76 struct {
77 u32 sampled_overflow;
78 u32 overflow;
79 u32 flush;
80 } stats[GUC_MAX_LOG_BUFFER];
81 };
82
83 void intel_guc_log_init_early(struct intel_guc_log *log);
84 int intel_guc_log_create(struct intel_guc_log *log);
85 void intel_guc_log_destroy(struct intel_guc_log *log);
86
87 int intel_guc_log_set_level(struct intel_guc_log *log, u32 level);
88 bool intel_guc_log_relay_enabled(const struct intel_guc_log *log);
89 int intel_guc_log_relay_open(struct intel_guc_log *log);
90 void intel_guc_log_relay_flush(struct intel_guc_log *log);
91 void intel_guc_log_relay_close(struct intel_guc_log *log);
92
93 void intel_guc_log_handle_flush_event(struct intel_guc_log *log);
94
intel_guc_log_get_level(struct intel_guc_log * log)95 static inline u32 intel_guc_log_get_level(struct intel_guc_log *log)
96 {
97 return log->level;
98 }
99
100 #endif
101
