/* 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>
#include <linux/kconfig.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_COTABLE_RESIZE,
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
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