1/* SPDX-License-Identifier: GPL-2.0 OR MIT */ 2/************************************************************************** 3 * 4 * Copyright 2021 VMware, Inc., Palo Alto, CA., USA 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 24 * USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 28#ifndef _VMWGFX_MKSSTAT_H_ 29#define _VMWGFX_MKSSTAT_H_ 30 31#include <asm/page.h> 32 33/* Reservation marker for mksstat pid's */ 34#define MKSSTAT_PID_RESERVED -1 35 36#if IS_ENABLED(CONFIG_DRM_VMWGFX_MKSSTATS) 37/* 38 * Kernel-internal mksGuestStat counters. The order of this enum dictates the 39 * order of instantiation of these counters in the mksGuestStat pages. 40 */ 41 42typedef enum { 43 MKSSTAT_KERN_EXECBUF, /* vmw_execbuf_ioctl */ 44 45 MKSSTAT_KERN_COUNT /* Reserved entry; always last */ 46} mksstat_kern_stats_t; 47 48/** 49 * vmw_mksstat_get_kern_pstat: Computes the address of the MKSGuestStatCounterTime 50 * array from the address of the base page. 51 * 52 * @page_addr: Pointer to the base page. 53 * Return: Pointer to the MKSGuestStatCounterTime array. 54 */ 55 56static inline void *vmw_mksstat_get_kern_pstat(void *page_addr) 57{ 58 return page_addr + PAGE_SIZE * 1; 59} 60 61/** 62 * vmw_mksstat_get_kern_pinfo: Computes the address of the MKSGuestStatInfoEntry 63 * array from the address of the base page. 64 * 65 * @page_addr: Pointer to the base page. 66 * Return: Pointer to the MKSGuestStatInfoEntry array. 67 */ 68 69static inline void *vmw_mksstat_get_kern_pinfo(void *page_addr) 70{ 71 return page_addr + PAGE_SIZE * 2; 72} 73 74/** 75 * vmw_mksstat_get_kern_pstrs: Computes the address of the mksGuestStat strings 76 * sequence from the address of the base page. 77 * 78 * @page_addr: Pointer to the base page. 79 * Return: Pointer to the mksGuestStat strings sequence. 80 */ 81 82static inline void *vmw_mksstat_get_kern_pstrs(void *page_addr) 83{ 84 return page_addr + PAGE_SIZE * 3; 85} 86 87/* 88 * MKS_STAT_TIME_DECL/PUSH/POP macros to be used in timer-counted routines. 89 */ 90 91struct mksstat_timer_t { 92/* mutable */ mksstat_kern_stats_t old_top; 93 const u64 t0; 94 const int slot; 95}; 96 97#define MKS_STAT_TIME_DECL(kern_cntr) \ 98 struct mksstat_timer_t _##kern_cntr = { \ 99 .t0 = rdtsc(), \ 100 .slot = vmw_mksstat_get_kern_slot(current->pid, dev_priv) \ 101 } 102 103#define MKS_STAT_TIME_PUSH(kern_cntr) \ 104 do { \ 105 if (_##kern_cntr.slot >= 0) { \ 106 _##kern_cntr.old_top = dev_priv->mksstat_kern_top_timer[_##kern_cntr.slot]; \ 107 dev_priv->mksstat_kern_top_timer[_##kern_cntr.slot] = kern_cntr; \ 108 } \ 109 } while (0) 110 111#define MKS_STAT_TIME_POP(kern_cntr) \ 112 do { \ 113 if (_##kern_cntr.slot >= 0) { \ 114 const pid_t pid = atomic_cmpxchg(&dev_priv->mksstat_kern_pids[_##kern_cntr.slot], current->pid, MKSSTAT_PID_RESERVED); \ 115 dev_priv->mksstat_kern_top_timer[_##kern_cntr.slot] = _##kern_cntr.old_top; \ 116 \ 117 if (pid == current->pid) { \ 118 const u64 dt = rdtsc() - _##kern_cntr.t0; \ 119 MKSGuestStatCounterTime *pstat; \ 120 \ 121 BUG_ON(!dev_priv->mksstat_kern_pages[_##kern_cntr.slot]); \ 122 \ 123 pstat = vmw_mksstat_get_kern_pstat(page_address(dev_priv->mksstat_kern_pages[_##kern_cntr.slot])); \ 124 \ 125 atomic64_inc(&pstat[kern_cntr].counter.count); \ 126 atomic64_add(dt, &pstat[kern_cntr].selfCycles); \ 127 atomic64_add(dt, &pstat[kern_cntr].totalCycles); \ 128 \ 129 if (_##kern_cntr.old_top != MKSSTAT_KERN_COUNT) \ 130 atomic64_sub(dt, &pstat[_##kern_cntr.old_top].selfCycles); \ 131 \ 132 atomic_set(&dev_priv->mksstat_kern_pids[_##kern_cntr.slot], current->pid); \ 133 } \ 134 } \ 135 } while (0) 136 137#else 138#define MKS_STAT_TIME_DECL(kern_cntr) 139#define MKS_STAT_TIME_PUSH(kern_cntr) 140#define MKS_STAT_TIME_POP(kern_cntr) 141 142#endif /* IS_ENABLED(CONFIG_DRM_VMWGFX_MKSSTATS */ 143 144#endif 145