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      1 /*	$NetBSD: intel_guc_log.h,v 1.2 2021/12/18 23:45:31 riastradh Exp $	*/
      2 
      3 /* SPDX-License-Identifier: MIT */
      4 /*
      5  * Copyright  2014-2019 Intel Corporation
      6  */
      7 
      8 #ifndef _INTEL_GUC_LOG_H_
      9 #define _INTEL_GUC_LOG_H_
     10 
     11 #include <linux/mutex.h>
     12 #include <linux/relay.h>
     13 #include <linux/workqueue.h>
     14 
     15 #include "intel_guc_fwif.h"
     16 #include "i915_gem.h"
     17 
     18 struct intel_guc;
     19 
     20 #ifdef CONFIG_DRM_I915_DEBUG_GUC
     21 #define CRASH_BUFFER_SIZE	SZ_2M
     22 #define DPC_BUFFER_SIZE		SZ_8M
     23 #define ISR_BUFFER_SIZE		SZ_8M
     24 #else
     25 #define CRASH_BUFFER_SIZE	SZ_8K
     26 #define DPC_BUFFER_SIZE		SZ_32K
     27 #define ISR_BUFFER_SIZE		SZ_32K
     28 #endif
     29 
     30 /*
     31  * While we're using plain log level in i915, GuC controls are much more...
     32  * "elaborate"? We have a couple of bits for verbosity, separate bit for actual
     33  * log enabling, and separate bit for default logging - which "conveniently"
     34  * ignores the enable bit.
     35  */
     36 #define GUC_LOG_LEVEL_DISABLED		0
     37 #define GUC_LOG_LEVEL_NON_VERBOSE	1
     38 #define GUC_LOG_LEVEL_IS_ENABLED(x)	((x) > GUC_LOG_LEVEL_DISABLED)
     39 #define GUC_LOG_LEVEL_IS_VERBOSE(x)	((x) > GUC_LOG_LEVEL_NON_VERBOSE)
     40 #define GUC_LOG_LEVEL_TO_VERBOSITY(x) ({		\
     41 	typeof(x) _x = (x);				\
     42 	GUC_LOG_LEVEL_IS_VERBOSE(_x) ? _x - 2 : 0;	\
     43 })
     44 #define GUC_VERBOSITY_TO_LOG_LEVEL(x)	((x) + 2)
     45 #define GUC_LOG_LEVEL_MAX GUC_VERBOSITY_TO_LOG_LEVEL(GUC_LOG_VERBOSITY_MAX)
     46 
     47 struct intel_guc_log {
     48 	u32 level;
     49 	struct i915_vma *vma;
     50 	struct {
     51 		void *buf_addr;
     52 		bool started;
     53 		struct work_struct flush_work;
     54 		struct rchan *channel;
     55 		struct mutex lock;
     56 		u32 full_count;
     57 	} relay;
     58 	/* logging related stats */
     59 	struct {
     60 		u32 sampled_overflow;
     61 		u32 overflow;
     62 		u32 flush;
     63 	} stats[GUC_MAX_LOG_BUFFER];
     64 };
     65 
     66 void intel_guc_log_init_early(struct intel_guc_log *log);
     67 int intel_guc_log_create(struct intel_guc_log *log);
     68 void intel_guc_log_destroy(struct intel_guc_log *log);
     69 
     70 int intel_guc_log_set_level(struct intel_guc_log *log, u32 level);
     71 bool intel_guc_log_relay_created(const struct intel_guc_log *log);
     72 int intel_guc_log_relay_open(struct intel_guc_log *log);
     73 int intel_guc_log_relay_start(struct intel_guc_log *log);
     74 void intel_guc_log_relay_flush(struct intel_guc_log *log);
     75 void intel_guc_log_relay_close(struct intel_guc_log *log);
     76 
     77 void intel_guc_log_handle_flush_event(struct intel_guc_log *log);
     78 
     79 static inline u32 intel_guc_log_get_level(struct intel_guc_log *log)
     80 {
     81 	return log->level;
     82 }
     83 
     84 #endif
     85