diff options
author | Martin Krastev <krastevm@vmware.com> | 2021-06-09 13:23:00 -0400 |
---|---|---|
committer | Zack Rusin <zackr@vmware.com> | 2021-06-12 00:00:53 -0400 |
commit | 7a7a933edd6c3a6d5d64e08093f2d564104cefcd (patch) | |
tree | f2dbbf349e68a86b5e078c6e2e91dd806a6887f7 /drivers/gpu/drm/vmwgfx/vmwgfx_mksstat.h | |
parent | d92223ead97cd697abe76c5b7a78160d6910a90d (diff) |
drm/vmwgfx: Introduce VMware mks-guest-stats
VMware mks-guest-stats mechanism allows the collection of performance stats from
guest userland GL contexts, as well as from vmwgfx kernelspace, via a set of sw-
defined performance counters. The userspace performance counters are (de)registerd
with vmware-vmx-stats hypervisor via new iocts. The vmwgfx kernelspace counters
are controlled at build-time via a new config DRM_VMWGFX_MKSSTATS.
* Add vmw_mksstat_{add|remove|reset}_ioctl controlling the tracking of
mks-guest-stats in guest winsys contexts
* Add DRM_VMWGFX_MKSSTATS config to drivers/gpu/drm/vmwgfx/Kconfig controlling
the instrumentation of vmwgfx for kernelspace mks-guest-stats counters
* Instrument vmwgfx vmw_execbuf_ioctl to collect mks-guest-stats according to
DRM_VMWGFX_MKSSTATS
Signed-off-by: Martin Krastev <krastevm@vmware.com>
Reviewed-by: Zack Rusin <zackr@vmware.com>
Signed-off-by: Zack Rusin <zackr@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210609172307.131929-3-zackr@vmware.com
Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_mksstat.h')
-rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_mksstat.h | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_mksstat.h b/drivers/gpu/drm/vmwgfx/vmwgfx_mksstat.h new file mode 100644 index 000000000000..0509f55f07b4 --- /dev/null +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_mksstat.h @@ -0,0 +1,144 @@ +/* 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 |