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/workqueue.h>
29
30#include "intel_guc_fwif.h"
31
32struct drm_i915_private;
33struct intel_guc;
34
35/*
36 * The first page is to save log buffer state. Allocate one
37 * extra page for others in case for overlap
38 */
39#define GUC_LOG_SIZE	((1 + GUC_LOG_DPC_PAGES + 1 + GUC_LOG_ISR_PAGES + \
40			  1 + GUC_LOG_CRASH_PAGES + 1) << PAGE_SHIFT)
41
42struct intel_guc_log {
43	u32 flags;
44	struct i915_vma *vma;
45	/* The runtime stuff gets created only when GuC logging gets enabled */
46	struct {
47		void *buf_addr;
48		struct workqueue_struct *flush_wq;
49		struct work_struct flush_work;
50		struct rchan *relay_chan;
51		/* To serialize the access to relay_chan */
52		struct mutex relay_lock;
53	} runtime;
54	/* logging related stats */
55	u32 capture_miss_count;
56	u32 flush_interrupt_count;
57	u32 prev_overflow_count[GUC_MAX_LOG_BUFFER];
58	u32 total_overflow_count[GUC_MAX_LOG_BUFFER];
59	u32 flush_count[GUC_MAX_LOG_BUFFER];
60};
61
62int intel_guc_log_create(struct intel_guc *guc);
63void intel_guc_log_destroy(struct intel_guc *guc);
64void intel_guc_log_init_early(struct intel_guc *guc);
65int intel_guc_log_relay_create(struct intel_guc *guc);
66void intel_guc_log_relay_destroy(struct intel_guc *guc);
67int intel_guc_log_control(struct intel_guc *guc, u64 control_val);
68void i915_guc_log_register(struct drm_i915_private *dev_priv);
69void i915_guc_log_unregister(struct drm_i915_private *dev_priv);
70
71#endif