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drm/etnaviv: add infrastructure to query perf counter

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Make it possible that userspace can query all performance domains and
its signals. This information is needed to sample those signals via
submit ioctl.

At the moment no performance domain is available.

Changes from v1 -> v2:
- use a 16 bit value for signals
- fix padding issues
- add id member to domain and signal struct

Changes v4 -> v5
- provide for each pipe an own set of pm domains

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
This commit is contained in:
Christian Gmeiner 2017-09-24 15:15:21 +02:00 committed by Lucas Stach
parent 95a428c172
commit 9e2c2e2730
5 changed files with 209 additions and 2 deletions
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3
drivers/gpu/drm/etnaviv/Makefile
View file

@ -10,6 +10,7 @@ etnaviv-y := \
etnaviv_gpu.o \
etnaviv_iommu_v2.o \
etnaviv_iommu.o \
etnaviv_mmu.o
etnaviv_mmu.o \
etnaviv_perfmon.o
obj-$(CONFIG_DRM_ETNAVIV) += etnaviv.o

37
drivers/gpu/drm/etnaviv/etnaviv_drv.c
View file

@ -23,6 +23,7 @@
#include "etnaviv_gpu.h"
#include "etnaviv_gem.h"
#include "etnaviv_mmu.h"
#include "etnaviv_perfmon.h"
#ifdef CONFIG_DRM_ETNAVIV_REGISTER_LOGGING
static bool reglog;
@ -451,6 +452,40 @@ static int etnaviv_ioctl_gem_wait(struct drm_device *dev, void *data,
return ret;
}
static int etnaviv_ioctl_pm_query_dom(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct etnaviv_drm_private *priv = dev->dev_private;
struct drm_etnaviv_pm_domain *args = data;
struct etnaviv_gpu *gpu;
if (args->pipe >= ETNA_MAX_PIPES)
return -EINVAL;
gpu = priv->gpu[args->pipe];
if (!gpu)
return -ENXIO;
return etnaviv_pm_query_dom(gpu, args);
}
static int etnaviv_ioctl_pm_query_sig(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct etnaviv_drm_private *priv = dev->dev_private;
struct drm_etnaviv_pm_signal *args = data;
struct etnaviv_gpu *gpu;
if (args->pipe >= ETNA_MAX_PIPES)
return -EINVAL;
gpu = priv->gpu[args->pipe];
if (!gpu)
return -ENXIO;
return etnaviv_pm_query_sig(gpu, args);
}
static const struct drm_ioctl_desc etnaviv_ioctls[] = {
#define ETNA_IOCTL(n, func, flags) \
DRM_IOCTL_DEF_DRV(ETNAVIV_##n, etnaviv_ioctl_##func, flags)
@ -463,6 +498,8 @@ static const struct drm_ioctl_desc etnaviv_ioctls[] = {
ETNA_IOCTL(WAIT_FENCE, wait_fence, DRM_AUTH|DRM_RENDER_ALLOW),
ETNA_IOCTL(GEM_USERPTR, gem_userptr, DRM_AUTH|DRM_RENDER_ALLOW),
ETNA_IOCTL(GEM_WAIT, gem_wait, DRM_AUTH|DRM_RENDER_ALLOW),
ETNA_IOCTL(PM_QUERY_DOM, pm_query_dom, DRM_AUTH|DRM_RENDER_ALLOW),
ETNA_IOCTL(PM_QUERY_SIG, pm_query_sig, DRM_AUTH|DRM_RENDER_ALLOW),
};
static const struct vm_operations_struct vm_ops = {

113
drivers/gpu/drm/etnaviv/etnaviv_perfmon.c Normal file
View file

@ -0,0 +1,113 @@
/*
* Copyright (C) 2017 Etnaviv Project
* Copyright (C) 2017 Zodiac Inflight Innovations
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "etnaviv_gpu.h"
struct etnaviv_pm_domain;
struct etnaviv_pm_signal {
char name[64];
u32 data;
u32 (*sample)(struct etnaviv_gpu *gpu,
const struct etnaviv_pm_domain *domain,
const struct etnaviv_pm_signal *signal);
};
struct etnaviv_pm_domain {
char name[64];
u8 nr_signals;
const struct etnaviv_pm_signal *signal;
};
struct etnaviv_pm_domain_meta {
const struct etnaviv_pm_domain *domains;
u32 nr_domains;
};
static const struct etnaviv_pm_domain doms_3d[] = {
};
static const struct etnaviv_pm_domain doms_2d[] = {
};
static const struct etnaviv_pm_domain doms_vg[] = {
};
static const struct etnaviv_pm_domain_meta doms_meta[] = {
{
.nr_domains = ARRAY_SIZE(doms_3d),
.domains = &doms_3d[0]
},
{
.nr_domains = ARRAY_SIZE(doms_2d),
.domains = &doms_2d[0]
},
{
.nr_domains = ARRAY_SIZE(doms_vg),
.domains = &doms_vg[0]
}
};
int etnaviv_pm_query_dom(struct etnaviv_gpu *gpu,
struct drm_etnaviv_pm_domain *domain)
{
const struct etnaviv_pm_domain_meta *meta = &doms_meta[domain->pipe];
const struct etnaviv_pm_domain *dom;
if (domain->iter >= meta->nr_domains)
return -EINVAL;
dom = meta->domains + domain->iter;
domain->id = domain->iter;
domain->nr_signals = dom->nr_signals;
strncpy(domain->name, dom->name, sizeof(domain->name));
domain->iter++;
if (domain->iter == meta->nr_domains)
domain->iter = 0xff;
return 0;
}
int etnaviv_pm_query_sig(struct etnaviv_gpu *gpu,
struct drm_etnaviv_pm_signal *signal)
{
const struct etnaviv_pm_domain_meta *meta = &doms_meta[signal->pipe];
const struct etnaviv_pm_domain *dom;
const struct etnaviv_pm_signal *sig;
if (signal->domain >= meta->nr_domains)
return -EINVAL;
dom = meta->domains + signal->domain;
if (signal->iter > dom->nr_signals)
return -EINVAL;
sig = &dom->signal[signal->iter];
signal->id = signal->iter;
strncpy(signal->name, sig->name, sizeof(signal->name));
signal->iter++;
if (signal->iter == dom->nr_signals)
signal->iter = 0xffff;
return 0;
}

31
drivers/gpu/drm/etnaviv/etnaviv_perfmon.h Normal file
View file

@ -0,0 +1,31 @@
/*
* Copyright (C) 2017 Etnaviv Project
* Copyright (C) 2017 Zodiac Inflight Innovations
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __ETNAVIV_PERFMON_H__
#define __ETNAVIV_PERFMON_H__
struct etnaviv_gpu;
struct drm_etnaviv_pm_domain;
struct drm_etnaviv_pm_signal;
int etnaviv_pm_query_dom(struct etnaviv_gpu *gpu,
struct drm_etnaviv_pm_domain *domain);
int etnaviv_pm_query_sig(struct etnaviv_gpu *gpu,
struct drm_etnaviv_pm_signal *signal);
#endif /* __ETNAVIV_PERFMON_H__ */

27
include/uapi/drm/etnaviv_drm.h
View file

@ -210,6 +210,27 @@ struct drm_etnaviv_gem_wait {
struct drm_etnaviv_timespec timeout; /* in */
};
/*
* Performance Monitor (PM):
*/
struct drm_etnaviv_pm_domain {
__u32 pipe; /* in */
__u8 iter; /* in/out, select pm domain at index iter */
__u8 id; /* out, id of domain */
__u16 nr_signals; /* out, how many signals does this domain provide */
char name[64]; /* out, name of domain */
};
struct drm_etnaviv_pm_signal {
__u32 pipe; /* in */
__u8 domain; /* in, pm domain index */
__u8 pad;
__u16 iter; /* in/out, select pm source at index iter */
__u16 id; /* out, id of signal */
char name[64]; /* out, name of domain */
};
#define DRM_ETNAVIV_GET_PARAM 0x00
/* placeholder:
#define DRM_ETNAVIV_SET_PARAM 0x01
@ -222,7 +243,9 @@ struct drm_etnaviv_gem_wait {
#define DRM_ETNAVIV_WAIT_FENCE 0x07
#define DRM_ETNAVIV_GEM_USERPTR 0x08
#define DRM_ETNAVIV_GEM_WAIT 0x09
#define DRM_ETNAVIV_NUM_IOCTLS 0x0a
#define DRM_ETNAVIV_PM_QUERY_DOM 0x0a
#define DRM_ETNAVIV_PM_QUERY_SIG 0x0b
#define DRM_ETNAVIV_NUM_IOCTLS 0x0c
#define DRM_IOCTL_ETNAVIV_GET_PARAM DRM_IOWR(DRM_COMMAND_BASE + DRM_ETNAVIV_GET_PARAM, struct drm_etnaviv_param)
#define DRM_IOCTL_ETNAVIV_GEM_NEW DRM_IOWR(DRM_COMMAND_BASE + DRM_ETNAVIV_GEM_NEW, struct drm_etnaviv_gem_new)
@ -233,6 +256,8 @@ struct drm_etnaviv_gem_wait {
#define DRM_IOCTL_ETNAVIV_WAIT_FENCE DRM_IOW(DRM_COMMAND_BASE + DRM_ETNAVIV_WAIT_FENCE, struct drm_etnaviv_wait_fence)
#define DRM_IOCTL_ETNAVIV_GEM_USERPTR DRM_IOWR(DRM_COMMAND_BASE + DRM_ETNAVIV_GEM_USERPTR, struct drm_etnaviv_gem_userptr)
#define DRM_IOCTL_ETNAVIV_GEM_WAIT DRM_IOW(DRM_COMMAND_BASE + DRM_ETNAVIV_GEM_WAIT, struct drm_etnaviv_gem_wait)
#define DRM_IOCTL_ETNAVIV_PM_QUERY_DOM DRM_IOWR(DRM_COMMAND_BASE + DRM_ETNAVIV_PM_QUERY_DOM, struct drm_etnaviv_pm_domain)
#define DRM_IOCTL_ETNAVIV_PM_QUERY_SIG DRM_IOWR(DRM_COMMAND_BASE + DRM_ETNAVIV_PM_QUERY_SIG, struct drm_etnaviv_pm_signal)
#if defined(__cplusplus)
}