145 lines
6.9 KiB
C
145 lines
6.9 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 OR MIT */
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/**************************************************************************
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*
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* Copyright 2021 VMware, Inc., Palo Alto, CA., USA
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#ifndef _VMWGFX_MKSSTAT_H_
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#define _VMWGFX_MKSSTAT_H_
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#include <asm/page.h>
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/* Reservation marker for mksstat pid's */
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#define MKSSTAT_PID_RESERVED -1
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#if IS_ENABLED(CONFIG_DRM_VMWGFX_MKSSTATS)
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/*
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* Kernel-internal mksGuestStat counters. The order of this enum dictates the
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* order of instantiation of these counters in the mksGuestStat pages.
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*/
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typedef enum {
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MKSSTAT_KERN_EXECBUF, /* vmw_execbuf_ioctl */
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MKSSTAT_KERN_COUNT /* Reserved entry; always last */
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} mksstat_kern_stats_t;
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/**
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* vmw_mksstat_get_kern_pstat: Computes the address of the MKSGuestStatCounterTime
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* array from the address of the base page.
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*
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* @page_addr: Pointer to the base page.
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* Return: Pointer to the MKSGuestStatCounterTime array.
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*/
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static inline void *vmw_mksstat_get_kern_pstat(void *page_addr)
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{
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return page_addr + PAGE_SIZE * 1;
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}
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/**
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* vmw_mksstat_get_kern_pinfo: Computes the address of the MKSGuestStatInfoEntry
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* array from the address of the base page.
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*
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* @page_addr: Pointer to the base page.
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* Return: Pointer to the MKSGuestStatInfoEntry array.
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*/
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static inline void *vmw_mksstat_get_kern_pinfo(void *page_addr)
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{
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return page_addr + PAGE_SIZE * 2;
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}
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/**
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* vmw_mksstat_get_kern_pstrs: Computes the address of the mksGuestStat strings
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* sequence from the address of the base page.
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*
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* @page_addr: Pointer to the base page.
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* Return: Pointer to the mksGuestStat strings sequence.
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*/
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static inline void *vmw_mksstat_get_kern_pstrs(void *page_addr)
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{
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return page_addr + PAGE_SIZE * 3;
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}
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/*
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* MKS_STAT_TIME_DECL/PUSH/POP macros to be used in timer-counted routines.
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*/
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struct mksstat_timer_t {
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/* mutable */ mksstat_kern_stats_t old_top;
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const u64 t0;
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const int slot;
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};
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#define MKS_STAT_TIME_DECL(kern_cntr) \
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struct mksstat_timer_t _##kern_cntr = { \
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.t0 = rdtsc(), \
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.slot = vmw_mksstat_get_kern_slot(current->pid, dev_priv) \
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}
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#define MKS_STAT_TIME_PUSH(kern_cntr) \
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do { \
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if (_##kern_cntr.slot >= 0) { \
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_##kern_cntr.old_top = dev_priv->mksstat_kern_top_timer[_##kern_cntr.slot]; \
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dev_priv->mksstat_kern_top_timer[_##kern_cntr.slot] = kern_cntr; \
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} \
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} while (0)
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#define MKS_STAT_TIME_POP(kern_cntr) \
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do { \
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if (_##kern_cntr.slot >= 0) { \
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const pid_t pid = atomic_cmpxchg(&dev_priv->mksstat_kern_pids[_##kern_cntr.slot], current->pid, MKSSTAT_PID_RESERVED); \
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dev_priv->mksstat_kern_top_timer[_##kern_cntr.slot] = _##kern_cntr.old_top; \
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\
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if (pid == current->pid) { \
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const u64 dt = rdtsc() - _##kern_cntr.t0; \
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MKSGuestStatCounterTime *pstat; \
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\
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BUG_ON(!dev_priv->mksstat_kern_pages[_##kern_cntr.slot]); \
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\
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pstat = vmw_mksstat_get_kern_pstat(page_address(dev_priv->mksstat_kern_pages[_##kern_cntr.slot])); \
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\
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atomic64_inc(&pstat[kern_cntr].counter.count); \
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atomic64_add(dt, &pstat[kern_cntr].selfCycles); \
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atomic64_add(dt, &pstat[kern_cntr].totalCycles); \
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\
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if (_##kern_cntr.old_top != MKSSTAT_KERN_COUNT) \
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atomic64_sub(dt, &pstat[_##kern_cntr.old_top].selfCycles); \
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\
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atomic_set(&dev_priv->mksstat_kern_pids[_##kern_cntr.slot], current->pid); \
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} \
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} \
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} while (0)
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#else
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#define MKS_STAT_TIME_DECL(kern_cntr)
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#define MKS_STAT_TIME_PUSH(kern_cntr)
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#define MKS_STAT_TIME_POP(kern_cntr)
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#endif /* IS_ENABLED(CONFIG_DRM_VMWGFX_MKSSTATS */
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#endif
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