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drm/nouveau: disallow fbcon accel if running in interrupt context

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A future commit will add locking to the DRM's channel, and there's numerous
problems that come up if we allow printk from an interrupt context to be
accelerated.  It seems saner to just disallow it completely.

As a nice side-effect, all the "to accel or not to accel" logic gets moved
out of the chipset-specific code.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs
2010-10-05 16:41:29 +10:00
parent 7c74cbd01b
commit ceed5f30bf
4 changed files with 161 additions and 141 deletions
Download Patch File Download Diff File Expand all files Collapse all files

153
drivers/gpu/drm/nouveau/nouveau_fbcon.c
View File

@@ -49,6 +49,90 @@
#include "nouveau_fbcon.h"
#include "nouveau_dma.h"
static void
nouveau_fbcon_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
{
struct nouveau_fbdev *nfbdev = info->par;
struct drm_device *dev = nfbdev->dev;
struct drm_nouveau_private *dev_priv = dev->dev_private;
int ret;
if (info->state != FBINFO_STATE_RUNNING)
return;
ret = -ENODEV;
if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED)) {
if (dev_priv->card_type < NV_50)
ret = nv04_fbcon_fillrect(info, rect);
else
if (dev_priv->card_type < NV_C0)
ret = nv50_fbcon_fillrect(info, rect);
}
if (ret == 0)
return;
if (ret != -ENODEV)
nouveau_fbcon_gpu_lockup(info);
cfb_fillrect(info, rect);
}
static void
nouveau_fbcon_copyarea(struct fb_info *info, const struct fb_copyarea *image)
{
struct nouveau_fbdev *nfbdev = info->par;
struct drm_device *dev = nfbdev->dev;
struct drm_nouveau_private *dev_priv = dev->dev_private;
int ret;
if (info->state != FBINFO_STATE_RUNNING)
return;
ret = -ENODEV;
if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED)) {
if (dev_priv->card_type < NV_50)
ret = nv04_fbcon_copyarea(info, image);
else
if (dev_priv->card_type < NV_C0)
ret = nv50_fbcon_copyarea(info, image);
}
if (ret == 0)
return;
if (ret != -ENODEV)
nouveau_fbcon_gpu_lockup(info);
cfb_copyarea(info, image);
}
static void
nouveau_fbcon_imageblit(struct fb_info *info, const struct fb_image *image)
{
struct nouveau_fbdev *nfbdev = info->par;
struct drm_device *dev = nfbdev->dev;
struct drm_nouveau_private *dev_priv = dev->dev_private;
int ret;
if (info->state != FBINFO_STATE_RUNNING)
return;
ret = -ENODEV;
if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED)) {
if (dev_priv->card_type < NV_50)
ret = nv04_fbcon_imageblit(info, image);
else
if (dev_priv->card_type < NV_C0)
ret = nv50_fbcon_imageblit(info, image);
}
if (ret == 0)
return;
if (ret != -ENODEV)
nouveau_fbcon_gpu_lockup(info);
cfb_imageblit(info, image);
}
static int
nouveau_fbcon_sync(struct fb_info *info)
{
@@ -94,43 +178,27 @@ nouveau_fbcon_sync(struct fb_info *info)
}
static struct fb_ops nouveau_fbcon_ops = {
.owner = THIS_MODULE,
.fb_check_var = drm_fb_helper_check_var,
.fb_set_par = drm_fb_helper_set_par,
.fb_fillrect = nouveau_fbcon_fillrect,
.fb_copyarea = nouveau_fbcon_copyarea,
.fb_imageblit = nouveau_fbcon_imageblit,
.fb_sync = nouveau_fbcon_sync,
.fb_pan_display = drm_fb_helper_pan_display,
.fb_blank = drm_fb_helper_blank,
.fb_setcmap = drm_fb_helper_setcmap,
.fb_debug_enter = drm_fb_helper_debug_enter,
.fb_debug_leave = drm_fb_helper_debug_leave,
};
static struct fb_ops nouveau_fbcon_sw_ops = {
.owner = THIS_MODULE,
.fb_check_var = drm_fb_helper_check_var,
.fb_set_par = drm_fb_helper_set_par,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
.fb_sync = nouveau_fbcon_sync,
.fb_pan_display = drm_fb_helper_pan_display,
.fb_blank = drm_fb_helper_blank,
.fb_setcmap = drm_fb_helper_setcmap,
.fb_debug_enter = drm_fb_helper_debug_enter,
.fb_debug_leave = drm_fb_helper_debug_leave,
};
static struct fb_ops nv04_fbcon_ops = {
.owner = THIS_MODULE,
.fb_check_var = drm_fb_helper_check_var,
.fb_set_par = drm_fb_helper_set_par,
.fb_fillrect = nv04_fbcon_fillrect,
.fb_copyarea = nv04_fbcon_copyarea,
.fb_imageblit = nv04_fbcon_imageblit,
.fb_sync = nouveau_fbcon_sync,
.fb_pan_display = drm_fb_helper_pan_display,
.fb_blank = drm_fb_helper_blank,
.fb_setcmap = drm_fb_helper_setcmap,
.fb_debug_enter = drm_fb_helper_debug_enter,
.fb_debug_leave = drm_fb_helper_debug_leave,
};
static struct fb_ops nv50_fbcon_ops = {
.owner = THIS_MODULE,
.fb_check_var = drm_fb_helper_check_var,
.fb_set_par = drm_fb_helper_set_par,
.fb_fillrect = nv50_fbcon_fillrect,
.fb_copyarea = nv50_fbcon_copyarea,
.fb_imageblit = nv50_fbcon_imageblit,
.fb_sync = nouveau_fbcon_sync,
.fb_pan_display = drm_fb_helper_pan_display,
.fb_blank = drm_fb_helper_blank,
.fb_setcmap = drm_fb_helper_setcmap,
@@ -257,7 +325,7 @@ nouveau_fbcon_create(struct nouveau_fbdev *nfbdev,
FBINFO_HWACCEL_FILLRECT |
FBINFO_HWACCEL_IMAGEBLIT;
info->flags |= FBINFO_CAN_FORCE_OUTPUT;
info->fbops = &nouveau_fbcon_ops;
info->fbops = &nouveau_fbcon_sw_ops;
info->fix.smem_start = dev->mode_config.fb_base + nvbo->bo.offset -
dev_priv->vm_vram_base;
info->fix.smem_len = size;
@@ -286,18 +354,15 @@ nouveau_fbcon_create(struct nouveau_fbdev *nfbdev,
info->pixmap.scan_align = 1;
if (dev_priv->channel && !nouveau_nofbaccel) {
switch (dev_priv->card_type) {
case NV_C0:
break;
case NV_50:
nv50_fbcon_accel_init(info);
info->fbops = &nv50_fbcon_ops;
break;
default:
nv04_fbcon_accel_init(info);
info->fbops = &nv04_fbcon_ops;
break;
};
ret = -ENODEV;
if (dev_priv->card_type < NV_50)
ret = nv04_fbcon_accel_init(info);
else
if (dev_priv->card_type < NV_C0)
ret = nv50_fbcon_accel_init(info);
if (ret == 0)
info->fbops = &nouveau_fbcon_ops;
}
nouveau_fbcon_zfill(dev, nfbdev);