linux_dsm_epyc7002/drivers/gpu/drm/nouveau/nouveau_fence.c
Linus Torvalds 612a9aab56 Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
Pull drm merge (part 1) from Dave Airlie:
 "So first of all my tree and uapi stuff has a conflict mess, its my
  fault as the nouveau stuff didn't hit -next as were trying to rebase
  regressions out of it before we merged.

  Highlights:
   - SH mobile modesetting driver and associated helpers
   - some DRM core documentation
   - i915 modesetting rework, haswell hdmi, haswell and vlv fixes, write
     combined pte writing, ilk rc6 support,
   - nouveau: major driver rework into a hw core driver, makes features
     like SLI a lot saner to implement,
   - psb: add eDP/DP support for Cedarview
   - radeon: 2 layer page tables, async VM pte updates, better PLL
     selection for > 2 screens, better ACPI interactions

  The rest is general grab bag of fixes.

  So why part 1? well I have the exynos pull req which came in a bit
  late but was waiting for me to do something they shouldn't have and it
  looks fairly safe, and David Howells has some more header cleanups
  he'd like me to pull, that seem like a good idea, but I'd like to get
  this merge out of the way so -next dosen't get blocked."

Tons of conflicts mostly due to silly include line changes, but mostly
mindless.  A few other small semantic conflicts too, noted from Dave's
pre-merged branch.

* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (447 commits)
  drm/nv98/crypt: fix fuc build with latest envyas
  drm/nouveau/devinit: fixup various issues with subdev ctor/init ordering
  drm/nv41/vm: fix and enable use of "real" pciegart
  drm/nv44/vm: fix and enable use of "real" pciegart
  drm/nv04/dmaobj: fixup vm target handling in preparation for nv4x pcie
  drm/nouveau: store supported dma mask in vmmgr
  drm/nvc0/ibus: initial implementation of subdev
  drm/nouveau/therm: add support for fan-control modes
  drm/nouveau/hwmon: rename pwm0* to pmw1* to follow hwmon's rules
  drm/nouveau/therm: calculate the pwm divisor on nv50+
  drm/nouveau/fan: rewrite the fan tachometer driver to get more precision, faster
  drm/nouveau/therm: move thermal-related functions to the therm subdev
  drm/nouveau/bios: parse the pwm divisor from the perf table
  drm/nouveau/therm: use the EXTDEV table to detect i2c monitoring devices
  drm/nouveau/therm: rework thermal table parsing
  drm/nouveau/gpio: expose the PWM/TOGGLE parameter found in the gpio vbios table
  drm/nouveau: fix pm initialization order
  drm/nouveau/bios: check that fixed tvdac gpio data is valid before using it
  drm/nouveau: log channel debug/error messages from client object rather than drm client
  drm/nouveau: have drm debugging macros build on top of core macros
  ...
2012-10-03 23:29:23 -07:00

207 lines
4.8 KiB
C

/*
* Copyright (C) 2007 Ben Skeggs.
* All Rights Reserved.
*
* 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 (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 NONINFRINGEMENT.
* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) 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.
*
*/
#include <drm/drmP.h>
#include <linux/ktime.h>
#include <linux/hrtimer.h>
#include "nouveau_drm.h"
#include "nouveau_dma.h"
#include "nouveau_fence.h"
void
nouveau_fence_context_del(struct nouveau_fence_chan *fctx)
{
struct nouveau_fence *fence, *fnext;
spin_lock(&fctx->lock);
list_for_each_entry_safe(fence, fnext, &fctx->pending, head) {
if (fence->work)
fence->work(fence->priv, false);
fence->channel = NULL;
list_del(&fence->head);
nouveau_fence_unref(&fence);
}
spin_unlock(&fctx->lock);
}
void
nouveau_fence_context_new(struct nouveau_fence_chan *fctx)
{
INIT_LIST_HEAD(&fctx->flip);
INIT_LIST_HEAD(&fctx->pending);
spin_lock_init(&fctx->lock);
}
static void
nouveau_fence_update(struct nouveau_channel *chan)
{
struct nouveau_fence_priv *priv = chan->drm->fence;
struct nouveau_fence_chan *fctx = chan->fence;
struct nouveau_fence *fence, *fnext;
spin_lock(&fctx->lock);
list_for_each_entry_safe(fence, fnext, &fctx->pending, head) {
if (priv->read(chan) < fence->sequence)
break;
if (fence->work)
fence->work(fence->priv, true);
fence->channel = NULL;
list_del(&fence->head);
nouveau_fence_unref(&fence);
}
spin_unlock(&fctx->lock);
}
int
nouveau_fence_emit(struct nouveau_fence *fence, struct nouveau_channel *chan)
{
struct nouveau_fence_priv *priv = chan->drm->fence;
struct nouveau_fence_chan *fctx = chan->fence;
int ret;
fence->channel = chan;
fence->timeout = jiffies + (3 * DRM_HZ);
fence->sequence = ++fctx->sequence;
ret = priv->emit(fence);
if (!ret) {
kref_get(&fence->kref);
spin_lock(&fctx->lock);
list_add_tail(&fence->head, &fctx->pending);
spin_unlock(&fctx->lock);
}
return ret;
}
bool
nouveau_fence_done(struct nouveau_fence *fence)
{
if (fence->channel)
nouveau_fence_update(fence->channel);
return !fence->channel;
}
int
nouveau_fence_wait(struct nouveau_fence *fence, bool lazy, bool intr)
{
unsigned long sleep_time = NSEC_PER_MSEC / 1000;
ktime_t t;
int ret = 0;
while (!nouveau_fence_done(fence)) {
if (fence->timeout && time_after_eq(jiffies, fence->timeout)) {
ret = -EBUSY;
break;
}
__set_current_state(intr ? TASK_INTERRUPTIBLE :
TASK_UNINTERRUPTIBLE);
if (lazy) {
t = ktime_set(0, sleep_time);
schedule_hrtimeout(&t, HRTIMER_MODE_REL);
sleep_time *= 2;
if (sleep_time > NSEC_PER_MSEC)
sleep_time = NSEC_PER_MSEC;
}
if (intr && signal_pending(current)) {
ret = -ERESTARTSYS;
break;
}
}
__set_current_state(TASK_RUNNING);
return ret;
}
int
nouveau_fence_sync(struct nouveau_fence *fence, struct nouveau_channel *chan)
{
struct nouveau_fence_priv *priv = chan->drm->fence;
struct nouveau_channel *prev;
int ret = 0;
prev = fence ? fence->channel : NULL;
if (prev) {
if (unlikely(prev != chan && !nouveau_fence_done(fence))) {
ret = priv->sync(fence, prev, chan);
if (unlikely(ret))
ret = nouveau_fence_wait(fence, true, false);
}
}
return ret;
}
static void
nouveau_fence_del(struct kref *kref)
{
struct nouveau_fence *fence = container_of(kref, typeof(*fence), kref);
kfree(fence);
}
void
nouveau_fence_unref(struct nouveau_fence **pfence)
{
if (*pfence)
kref_put(&(*pfence)->kref, nouveau_fence_del);
*pfence = NULL;
}
struct nouveau_fence *
nouveau_fence_ref(struct nouveau_fence *fence)
{
kref_get(&fence->kref);
return fence;
}
int
nouveau_fence_new(struct nouveau_channel *chan, struct nouveau_fence **pfence)
{
struct nouveau_fence *fence;
int ret = 0;
if (unlikely(!chan->fence))
return -ENODEV;
fence = kzalloc(sizeof(*fence), GFP_KERNEL);
if (!fence)
return -ENOMEM;
kref_init(&fence->kref);
if (chan) {
ret = nouveau_fence_emit(fence, chan);
if (ret)
nouveau_fence_unref(&fence);
}
*pfence = fence;
return ret;
}