linux/drivers/gpu/drm/nouveau/nouveau_display.c
Francisco Jerez 332b242f47 drm/nouveau: Implement the pageflip ioctl.
nv0x-nv4x should be mostly fine, nv50 doesn't work yet.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2010-12-03 15:11:12 +10:00

314 lines
8.0 KiB
C

/*
* Copyright (C) 2008 Maarten Maathuis.
* 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 "drmP.h"
#include "drm_crtc_helper.h"
#include "nouveau_drv.h"
#include "nouveau_fb.h"
#include "nouveau_fbcon.h"
#include "nouveau_hw.h"
#include "nouveau_crtc.h"
#include "nouveau_dma.h"
static void
nouveau_user_framebuffer_destroy(struct drm_framebuffer *drm_fb)
{
struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);
if (fb->nvbo)
drm_gem_object_unreference_unlocked(fb->nvbo->gem);
drm_framebuffer_cleanup(drm_fb);
kfree(fb);
}
static int
nouveau_user_framebuffer_create_handle(struct drm_framebuffer *drm_fb,
struct drm_file *file_priv,
unsigned int *handle)
{
struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);
return drm_gem_handle_create(file_priv, fb->nvbo->gem, handle);
}
static const struct drm_framebuffer_funcs nouveau_framebuffer_funcs = {
.destroy = nouveau_user_framebuffer_destroy,
.create_handle = nouveau_user_framebuffer_create_handle,
};
int
nouveau_framebuffer_init(struct drm_device *dev, struct nouveau_framebuffer *nouveau_fb,
struct drm_mode_fb_cmd *mode_cmd, struct nouveau_bo *nvbo)
{
int ret;
ret = drm_framebuffer_init(dev, &nouveau_fb->base, &nouveau_framebuffer_funcs);
if (ret) {
return ret;
}
drm_helper_mode_fill_fb_struct(&nouveau_fb->base, mode_cmd);
nouveau_fb->nvbo = nvbo;
return 0;
}
static struct drm_framebuffer *
nouveau_user_framebuffer_create(struct drm_device *dev,
struct drm_file *file_priv,
struct drm_mode_fb_cmd *mode_cmd)
{
struct nouveau_framebuffer *nouveau_fb;
struct drm_gem_object *gem;
int ret;
gem = drm_gem_object_lookup(dev, file_priv, mode_cmd->handle);
if (!gem)
return ERR_PTR(-ENOENT);
nouveau_fb = kzalloc(sizeof(struct nouveau_framebuffer), GFP_KERNEL);
if (!nouveau_fb)
return ERR_PTR(-ENOMEM);
ret = nouveau_framebuffer_init(dev, nouveau_fb, mode_cmd, nouveau_gem_object(gem));
if (ret) {
drm_gem_object_unreference(gem);
return ERR_PTR(ret);
}
return &nouveau_fb->base;
}
const struct drm_mode_config_funcs nouveau_mode_config_funcs = {
.fb_create = nouveau_user_framebuffer_create,
.output_poll_changed = nouveau_fbcon_output_poll_changed,
};
int
nouveau_vblank_enable(struct drm_device *dev, int crtc)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
if (dev_priv->card_type >= NV_50)
nv_mask(dev, NV50_PDISPLAY_INTR_EN_1, 0,
NV50_PDISPLAY_INTR_EN_1_VBLANK_CRTC_(crtc));
else
NVWriteCRTC(dev, crtc, NV_PCRTC_INTR_EN_0,
NV_PCRTC_INTR_0_VBLANK);
return 0;
}
void
nouveau_vblank_disable(struct drm_device *dev, int crtc)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
if (dev_priv->card_type >= NV_50)
nv_mask(dev, NV50_PDISPLAY_INTR_EN_1,
NV50_PDISPLAY_INTR_EN_1_VBLANK_CRTC_(crtc), 0);
else
NVWriteCRTC(dev, crtc, NV_PCRTC_INTR_EN_0, 0);
}
static int
nouveau_page_flip_reserve(struct nouveau_bo *old_bo,
struct nouveau_bo *new_bo)
{
int ret;
ret = nouveau_bo_pin(new_bo, TTM_PL_FLAG_VRAM);
if (ret)
return ret;
ret = ttm_bo_reserve(&new_bo->bo, false, false, false, 0);
if (ret)
goto fail;
ret = ttm_bo_reserve(&old_bo->bo, false, false, false, 0);
if (ret)
goto fail_unreserve;
return 0;
fail_unreserve:
ttm_bo_unreserve(&new_bo->bo);
fail:
nouveau_bo_unpin(new_bo);
return ret;
}
static void
nouveau_page_flip_unreserve(struct nouveau_bo *old_bo,
struct nouveau_bo *new_bo,
struct nouveau_fence *fence)
{
nouveau_bo_fence(new_bo, fence);
ttm_bo_unreserve(&new_bo->bo);
nouveau_bo_fence(old_bo, fence);
ttm_bo_unreserve(&old_bo->bo);
nouveau_bo_unpin(old_bo);
}
static int
nouveau_page_flip_emit(struct nouveau_channel *chan,
struct nouveau_bo *old_bo,
struct nouveau_bo *new_bo,
struct nouveau_page_flip_state *s,
struct nouveau_fence **pfence)
{
struct drm_device *dev = chan->dev;
unsigned long flags;
int ret;
/* Queue it to the pending list */
spin_lock_irqsave(&dev->event_lock, flags);
list_add_tail(&s->head, &chan->nvsw.flip);
spin_unlock_irqrestore(&dev->event_lock, flags);
/* Synchronize with the old framebuffer */
ret = nouveau_fence_sync(old_bo->bo.sync_obj, chan);
if (ret)
goto fail;
/* Emit the pageflip */
ret = RING_SPACE(chan, 2);
if (ret)
goto fail;
BEGIN_RING(chan, NvSubSw, NV_SW_PAGE_FLIP, 1);
OUT_RING(chan, 0);
FIRE_RING(chan);
ret = nouveau_fence_new(chan, pfence, true);
if (ret)
goto fail;
return 0;
fail:
spin_lock_irqsave(&dev->event_lock, flags);
list_del(&s->head);
spin_unlock_irqrestore(&dev->event_lock, flags);
return ret;
}
int
nouveau_crtc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event)
{
struct drm_device *dev = crtc->dev;
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_bo *old_bo = nouveau_framebuffer(crtc->fb)->nvbo;
struct nouveau_bo *new_bo = nouveau_framebuffer(fb)->nvbo;
struct nouveau_page_flip_state *s;
struct nouveau_channel *chan;
struct nouveau_fence *fence;
int ret;
if (dev_priv->engine.graph.accel_blocked)
return -ENODEV;
s = kzalloc(sizeof(*s), GFP_KERNEL);
if (!s)
return -ENOMEM;
/* Don't let the buffers go away while we flip */
ret = nouveau_page_flip_reserve(old_bo, new_bo);
if (ret)
goto fail_free;
/* Initialize a page flip struct */
*s = (struct nouveau_page_flip_state)
{ { }, s->event, nouveau_crtc(crtc)->index,
fb->bits_per_pixel, fb->pitch, crtc->x, crtc->y,
new_bo->bo.offset };
/* Choose the channel the flip will be handled in */
chan = nouveau_fence_channel(new_bo->bo.sync_obj);
if (!chan)
chan = nouveau_channel_get_unlocked(dev_priv->channel);
mutex_lock(&chan->mutex);
/* Emit a page flip */
ret = nouveau_page_flip_emit(chan, old_bo, new_bo, s, &fence);
nouveau_channel_put(&chan);
if (ret)
goto fail_unreserve;
/* Update the crtc struct and cleanup */
crtc->fb = fb;
nouveau_page_flip_unreserve(old_bo, new_bo, fence);
nouveau_fence_unref(&fence);
return 0;
fail_unreserve:
nouveau_page_flip_unreserve(old_bo, new_bo, NULL);
fail_free:
kfree(s);
return ret;
}
int
nouveau_finish_page_flip(struct nouveau_channel *chan,
struct nouveau_page_flip_state *ps)
{
struct drm_device *dev = chan->dev;
struct nouveau_page_flip_state *s;
unsigned long flags;
spin_lock_irqsave(&dev->event_lock, flags);
if (list_empty(&chan->nvsw.flip)) {
NV_ERROR(dev, "Unexpected pageflip in channel %d.\n", chan->id);
spin_unlock_irqrestore(&dev->event_lock, flags);
return -EINVAL;
}
s = list_first_entry(&chan->nvsw.flip,
struct nouveau_page_flip_state, head);
if (s->event) {
struct drm_pending_vblank_event *e = s->event;
struct timeval now;
do_gettimeofday(&now);
e->event.sequence = 0;
e->event.tv_sec = now.tv_sec;
e->event.tv_usec = now.tv_usec;
list_add_tail(&e->base.link, &e->base.file_priv->event_list);
wake_up_interruptible(&e->base.file_priv->event_wait);
}
list_del(&s->head);
*ps = *s;
kfree(s);
spin_unlock_irqrestore(&dev->event_lock, flags);
return 0;
}