drivers/gpu/drm/i915/intel_guc_log.h

   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
  95 static inline u32 intel_guc_log_get_level(struct intel_guc_log *log)
  96 {
  97         return log->level;
  98 }
  99
 100 #endif