summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/vmwgfx/vmwgfx_mksstat.h
blob: 0509f55f07b4ac5ae04d64a1629c5c6b665318cc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/**************************************************************************
 *
 * Copyright 2021 VMware, Inc., Palo Alto, CA., USA
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 **************************************************************************/

#ifndef _VMWGFX_MKSSTAT_H_
#define _VMWGFX_MKSSTAT_H_

#include <asm/page.h>

/* Reservation marker for mksstat pid's */
#define MKSSTAT_PID_RESERVED -1

#if IS_ENABLED(CONFIG_DRM_VMWGFX_MKSSTATS)
/*
 * Kernel-internal mksGuestStat counters. The order of this enum dictates the
 * order of instantiation of these counters in the mksGuestStat pages.
 */

typedef enum {
	MKSSTAT_KERN_EXECBUF, /* vmw_execbuf_ioctl */

	MKSSTAT_KERN_COUNT /* Reserved entry; always last */
} mksstat_kern_stats_t;

/**
 * vmw_mksstat_get_kern_pstat: Computes the address of the MKSGuestStatCounterTime
 * array from the address of the base page.
 *
 * @page_addr: Pointer to the base page.
 * Return: Pointer to the MKSGuestStatCounterTime array.
 */

static inline void *vmw_mksstat_get_kern_pstat(void *page_addr)
{
	return page_addr + PAGE_SIZE * 1;
}

/**
 * vmw_mksstat_get_kern_pinfo: Computes the address of the MKSGuestStatInfoEntry
 * array from the address of the base page.
 *
 * @page_addr: Pointer to the base page.
 * Return: Pointer to the MKSGuestStatInfoEntry array.
 */

static inline void *vmw_mksstat_get_kern_pinfo(void *page_addr)
{
	return page_addr + PAGE_SIZE * 2;
}

/**
 * vmw_mksstat_get_kern_pstrs: Computes the address of the mksGuestStat strings
 * sequence from the address of the base page.
 *
 * @page_addr: Pointer to the base page.
 * Return: Pointer to the mksGuestStat strings sequence.
 */

static inline void *vmw_mksstat_get_kern_pstrs(void *page_addr)
{
	return page_addr + PAGE_SIZE * 3;
}

/*
 * MKS_STAT_TIME_DECL/PUSH/POP macros to be used in timer-counted routines.
 */

struct mksstat_timer_t {
/* mutable */ mksstat_kern_stats_t old_top;
	const u64 t0;
	const int slot;
};

#define MKS_STAT_TIME_DECL(kern_cntr)                                     \
	struct mksstat_timer_t _##kern_cntr = {                           \
		.t0 = rdtsc(),                                            \
		.slot = vmw_mksstat_get_kern_slot(current->pid, dev_priv) \
	}

#define MKS_STAT_TIME_PUSH(kern_cntr)                                                               \
	do {                                                                                        \
		if (_##kern_cntr.slot >= 0) {                                                       \
			_##kern_cntr.old_top = dev_priv->mksstat_kern_top_timer[_##kern_cntr.slot]; \
			dev_priv->mksstat_kern_top_timer[_##kern_cntr.slot] = kern_cntr;            \
		}                                                                                   \
	} while (0)

#define MKS_STAT_TIME_POP(kern_cntr)                                                                                                           \
	do {                                                                                                                                   \
		if (_##kern_cntr.slot >= 0) {                                                                                                  \
			const pid_t pid = atomic_cmpxchg(&dev_priv->mksstat_kern_pids[_##kern_cntr.slot], current->pid, MKSSTAT_PID_RESERVED); \
			dev_priv->mksstat_kern_top_timer[_##kern_cntr.slot] = _##kern_cntr.old_top;                                            \
			                                                                                                                       \
			if (pid == current->pid) {                                                                                             \
				const u64 dt = rdtsc() - _##kern_cntr.t0;                                                                      \
				MKSGuestStatCounterTime *pstat;                                                                                \
				                                                                                                               \
				BUG_ON(!dev_priv->mksstat_kern_pages[_##kern_cntr.slot]);                                                      \
				                                                                                                               \
				pstat = vmw_mksstat_get_kern_pstat(page_address(dev_priv->mksstat_kern_pages[_##kern_cntr.slot]));             \
				                                                                                                               \
				atomic64_inc(&pstat[kern_cntr].counter.count);                                                                 \
				atomic64_add(dt, &pstat[kern_cntr].selfCycles);                                                                \
				atomic64_add(dt, &pstat[kern_cntr].totalCycles);                                                               \
				                                                                                                               \
				if (_##kern_cntr.old_top != MKSSTAT_KERN_COUNT)                                                                \
					atomic64_sub(dt, &pstat[_##kern_cntr.old_top].selfCycles);                                             \
					                                                                                                       \
				atomic_set(&dev_priv->mksstat_kern_pids[_##kern_cntr.slot], current->pid);                                     \
			}                                                                                                                      \
		}                                                                                                                              \
	} while (0)

#else
#define MKS_STAT_TIME_DECL(kern_cntr)
#define MKS_STAT_TIME_PUSH(kern_cntr)
#define MKS_STAT_TIME_POP(kern_cntr)

#endif /* IS_ENABLED(CONFIG_DRM_VMWGFX_MKSSTATS */

#endif