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drm/nouveau/nvif: protect waits against GPU falling off the bus

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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2020-02-17 14:58:02 +10:00
parent 58e92b5ee8
commit ed3d1489d2
11 changed files with 102 additions and 22 deletions
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3
drivers/gpu/drm/nouveau/dispnv04/dac.c
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@ -35,7 +35,8 @@
#include <subdev/bios/gpio.h>
#include <subdev/gpio.h>
#include <subdev/timer.h>
#include <nvif/timer.h>
int nv04_dac_output_offset(struct drm_encoder *encoder)
{

1
drivers/gpu/drm/nouveau/dispnv04/hw.c
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@ -26,6 +26,7 @@
#include "hw.h"
#include <subdev/bios/pll.h>
#include <nvif/timer.h>
#define CHIPSET_NFORCE 0x01a0
#define CHIPSET_NFORCE2 0x01f0

1
drivers/gpu/drm/nouveau/dispnv50/base507c.c
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@ -23,6 +23,7 @@
#include <nvif/cl507c.h>
#include <nvif/event.h>
#include <nvif/timer.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_fourcc.h>

1
drivers/gpu/drm/nouveau/dispnv50/core507d.c
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@ -23,6 +23,7 @@
#include "head.h"
#include <nvif/cl507d.h>
#include <nvif/timer.h>
#include "nouveau_bo.h"

2
drivers/gpu/drm/nouveau/dispnv50/corec37d.c
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@ -24,6 +24,8 @@
#include <nouveau_bo.h>
#include <nvif/timer.h>
void
corec37d_wndw_owner(struct nv50_core *core)
{

1
drivers/gpu/drm/nouveau/dispnv50/disp.c
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@ -45,6 +45,7 @@
#include <nvif/cl5070.h>
#include <nvif/cl507d.h>
#include <nvif/event.h>
#include <nvif/timer.h>
#include "nouveau_drv.h"
#include "nouveau_dma.h"

2
drivers/gpu/drm/nouveau/dispnv50/ovly827e.c
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@ -24,6 +24,8 @@
#include <nouveau_bo.h>
#include <nvif/timer.h>
static void
ovly827e_image_set(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw)
{

21
drivers/gpu/drm/nouveau/include/nvif/device.h
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@ -23,27 +23,6 @@ int nvif_device_init(struct nvif_object *, u32 handle, s32 oclass, void *, u32,
void nvif_device_fini(struct nvif_device *);
u64 nvif_device_time(struct nvif_device *);
/* Delay based on GPU time (ie. PTIMER).
*
* Will return -ETIMEDOUT unless the loop was terminated with 'break',
* where it will return the number of nanoseconds taken instead.
*/
#define nvif_nsec(d,n,cond...) ({ \
struct nvif_device *_device = (d); \
u64 _nsecs = (n), _time0 = nvif_device_time(_device); \
s64 _taken = 0; \
\
do { \
cond \
} while (_taken = nvif_device_time(_device) - _time0, _taken < _nsecs);\
\
if (_taken >= _nsecs) \
_taken = -ETIMEDOUT; \
_taken; \
})
#define nvif_usec(d,u,cond...) nvif_nsec((d), (u) * 1000, ##cond)
#define nvif_msec(d,m,cond...) nvif_usec((d), (m) * 1000, ##cond)
/*XXX*/
#include <subdev/bios.h>
#include <subdev/fb.h>

35
drivers/gpu/drm/nouveau/include/nvif/timer.h Normal file
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@ -0,0 +1,35 @@
#ifndef __NVIF_TIMER_H__
#define __NVIF_TIMER_H__
#include <nvif/os.h>
struct nvif_timer_wait {
struct nvif_device *device;
u64 limit;
u64 time0;
u64 time1;
int reads;
};
void nvif_timer_wait_init(struct nvif_device *, u64 nsec,
struct nvif_timer_wait *);
s64 nvif_timer_wait_test(struct nvif_timer_wait *);
/* Delay based on GPU time (ie. PTIMER).
*
* Will return -ETIMEDOUT unless the loop was terminated with 'break',
* where it will return the number of nanoseconds taken instead.
*/
#define nvif_nsec(d,n,cond...) ({ \
struct nvif_timer_wait _wait; \
s64 _taken = 0; \
\
nvif_timer_wait_init((d), (n), &_wait); \
do { \
cond \
} while ((_taken = nvif_timer_wait_test(&_wait)) >= 0); \
\
_taken; \
})
#define nvif_usec(d,u,cond...) nvif_nsec((d), (u) * 1000, ##cond)
#define nvif_msec(d,m,cond...) nvif_usec((d), (m) * 1000, ##cond)
#endif

1
drivers/gpu/drm/nouveau/nvif/Kbuild
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@ -8,6 +8,7 @@ nvif-y += nvif/fifo.o
nvif-y += nvif/mem.o
nvif-y += nvif/mmu.o
nvif-y += nvif/notify.o
nvif-y += nvif/timer.o
nvif-y += nvif/vmm.o
# Usermode classes

56
drivers/gpu/drm/nouveau/nvif/timer.c Normal file
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@ -0,0 +1,56 @@
/*
* Copyright 2020 Red Hat Inc.
*
* 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, sublicense,
* 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 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
*/
#include <nvif/timer.h>
#include <nvif/device.h>
s64
nvif_timer_wait_test(struct nvif_timer_wait *wait)
{
u64 time = nvif_device_time(wait->device);
if (wait->reads == 0) {
wait->time0 = time;
wait->time1 = time;
}
if (wait->time1 == time) {
if (WARN_ON(wait->reads++ == 16))
return -ETIMEDOUT;
} else {
wait->time1 = time;
wait->reads = 1;
}
if (wait->time1 - wait->time0 > wait->limit)
return -ETIMEDOUT;
return wait->time1 - wait->time0;
}
void
nvif_timer_wait_init(struct nvif_device *device, u64 nsec,
struct nvif_timer_wait *wait)
{
wait->device = device;
wait->limit = nsec;
wait->reads = 0;
}