search for: drm_fbdev_use_shadow_fb

..._info *info, u32 x, u32 y, > struct drm_clip_rect *clip = &helper->dirty_clip; > unsigned long flags; > > - if (!helper->fb->funcs->dirty) > - return; drm_fb_helper_dirty() is called unconditionally by drm_fb_helper_sys_imageblit() et al, so we need check with drm_fbdev_use_shadow_fb() here. > - > spin_lock_irqsave(&helper->dirty_lock, flags); > clip->x1 = min_t(u32, clip->x1, x); > clip->y1 = min_t(u32, clip->y1, y); > @@ -2166,6 +2165,16 @@ static struct fb_deferred_io drm_fbdev_defio = { > .deferred_io = drm_fb_helper_deferred_io...

..._info *info, u32 x, u32 y, > struct drm_clip_rect *clip = &helper->dirty_clip; > unsigned long flags; > > - if (!helper->fb->funcs->dirty) > - return; drm_fb_helper_dirty() is called unconditionally by drm_fb_helper_sys_imageblit() et al, so we need check with drm_fbdev_use_shadow_fb() here. > - > spin_lock_irqsave(&helper->dirty_lock, flags); > clip->x1 = min_t(u32, clip->x1, x); > clip->y1 = min_t(u32, clip->y1, y); > @@ -2166,6 +2165,16 @@ static struct fb_deferred_io drm_fbdev_defio = { > .deferred_io = drm_fb_helper_deferred_io...

...t; return -ENODEV; > } > > +static ssize_t drm_fbdev_fb_read(struct fb_info *info, char __user *buf, > + size_t count, loff_t *ppos) > +{ > + struct drm_fb_helper *fb_helper = info->par; > + struct drm_client_buffer *buffer = fb_helper->buffer; > + > + if (drm_fbdev_use_shadow_fb(fb_helper) || !buffer->map.is_iomem) > + return drm_fb_helper_sys_read(info, buf, count, ppos); > + else > + return drm_fb_helper_cfb_read(info, buf, count, ppos); > +} > + > +static ssize_t drm_fbdev_fb_write(struct fb_info *info, const char __user *buf, > + size_t c...

...t; return -ENODEV; > } > > +static ssize_t drm_fbdev_fb_read(struct fb_info *info, char __user *buf, > + size_t count, loff_t *ppos) > +{ > + struct drm_fb_helper *fb_helper = info->par; > + struct drm_client_buffer *buffer = fb_helper->buffer; > + > + if (drm_fbdev_use_shadow_fb(fb_helper) || !buffer->map.is_iomem) > + return drm_fb_helper_sys_read(info, buf, count, ppos); > + else > + return drm_fb_helper_cfb_read(info, buf, count, ppos); > +} > + > +static ssize_t drm_fbdev_fb_write(struct fb_info *info, const char __user *buf, > + size_t c...

...t; return -ENODEV; > } > > +static ssize_t drm_fbdev_fb_read(struct fb_info *info, char __user *buf, > + size_t count, loff_t *ppos) > +{ > + struct drm_fb_helper *fb_helper = info->par; > + struct drm_client_buffer *buffer = fb_helper->buffer; > + > + if (drm_fbdev_use_shadow_fb(fb_helper) || !buffer->map.is_iomem) > + return drm_fb_helper_sys_read(info, buf, count, ppos); > + else > + return drm_fb_helper_cfb_read(info, buf, count, ppos); > +} > + > +static ssize_t drm_fbdev_fb_write(struct fb_info *info, const char __user *buf, > + size_t c...

...ruct fb_info *info, struct vm_area_struct *vma) return -ENODEV; } +static ssize_t drm_fbdev_fb_read(struct fb_info *info, char __user *buf, + size_t count, loff_t *ppos) +{ + struct drm_fb_helper *fb_helper = info->par; + struct drm_client_buffer *buffer = fb_helper->buffer; + + if (drm_fbdev_use_shadow_fb(fb_helper) || !buffer->map.is_iomem) + return drm_fb_helper_sys_read(info, buf, count, ppos); + else + return drm_fb_helper_cfb_read(info, buf, count, ppos); +} + +static ssize_t drm_fbdev_fb_write(struct fb_info *info, const char __user *buf, + size_t count, loff_t *ppos) +{ + struct drm...

...> > +static ssize_t drm_fbdev_fb_read(struct fb_info *info, char __user *buf, > > + size_t count, loff_t *ppos) > > +{ > > + struct drm_fb_helper *fb_helper = info->par; > > + struct drm_client_buffer *buffer = fb_helper->buffer; > > + > > + if (drm_fbdev_use_shadow_fb(fb_helper) || !buffer->map.is_iomem) > > + return drm_fb_helper_sys_read(info, buf, count, ppos); > > + else > > + return drm_fb_helper_cfb_read(info, buf, count, ppos); > > +} > > + > > +static ssize_t drm_fbdev_fb_write(struct fb_info *info, const char &gt...

..._info *info, char __user *buf, >>> + size_t count, loff_t *ppos) >>> +{ >>> + struct drm_fb_helper *fb_helper = info->par; >>> + struct drm_client_buffer *buffer = fb_helper->buffer; >>> + >>> + if (drm_fbdev_use_shadow_fb(fb_helper) || !buffer->map.is_iomem) >>> + return drm_fb_helper_sys_read(info, buf, count, ppos); >>> + else >>> + return drm_fb_helper_cfb_read(info, buf, count, ppos); >>> +} >>> + >>> +static ssize_t drm_fbdev_f...

...> > +static ssize_t drm_fbdev_fb_read(struct fb_info *info, char __user *buf, > > + size_t count, loff_t *ppos) > > +{ > > + struct drm_fb_helper *fb_helper = info->par; > > + struct drm_client_buffer *buffer = fb_helper->buffer; > > + > > + if (drm_fbdev_use_shadow_fb(fb_helper) || !buffer->map.is_iomem) > > + return drm_fb_helper_sys_read(info, buf, count, ppos); > > + else > > + return drm_fb_helper_cfb_read(info, buf, count, ppos); > > +} > > + > > +static ssize_t drm_fbdev_fb_write(struct fb_info *info, const char &gt...

...ruct fb_info *info, struct vm_area_struct *vma) return -ENODEV; } +static ssize_t drm_fbdev_fb_read(struct fb_info *info, char __user *buf, + size_t count, loff_t *ppos) +{ + struct drm_fb_helper *fb_helper = info->par; + struct drm_client_buffer *buffer = fb_helper->buffer; + + if (drm_fbdev_use_shadow_fb(fb_helper) || !buffer->map.is_iomem) + return drm_fb_helper_sys_read(info, buf, count, ppos); + else + return drm_fb_helper_cfb_read(info, buf, count, ppos); +} + +static ssize_t drm_fbdev_fb_write(struct fb_info *info, const char __user *buf, + size_t count, loff_t *ppos) +{ + struct drm...

...ruct drm_clip_rect *clip = &helper->dirty_clip; >> unsigned long flags; >> >> - if (!helper->fb->funcs->dirty) >> - return; > > drm_fb_helper_dirty() is called unconditionally by > drm_fb_helper_sys_imageblit() et al, so we need check with > drm_fbdev_use_shadow_fb() here. > >> - >> spin_lock_irqsave(&helper->dirty_lock, flags); >> clip->x1 = min_t(u32, clip->x1, x); >> clip->y1 = min_t(u32, clip->y1, y); >> @@ -2166,6 +2165,16 @@ static struct fb_deferred_io drm_fbdev_defio = { >> .deferred_i...

..._fb_read(struct fb_info *info, char __user *buf, > > + size_t count, loff_t *ppos) > > +{ > > + struct drm_fb_helper *fb_helper = info->par; > > + struct drm_client_buffer *buffer = fb_helper->buffer; > > + > > + if (drm_fbdev_use_shadow_fb(fb_helper) || !buffer->map.is_iomem) > > + return drm_fb_helper_sys_read(info, buf, count, ppos); > > + else > > + return drm_fb_helper_cfb_read(info, buf, count, ppos); > > +} > > + > > +static ssize_t drm_fbdev_fb_write(struct fb_...

...;dirty) - return; - spin_lock_irqsave(&helper->dirty_lock, flags); clip->x1 = min_t(u32, clip->x1, x); clip->y1 = min_t(u32, clip->y1, y); @@ -2166,6 +2165,16 @@ static struct fb_deferred_io drm_fbdev_defio = { .deferred_io = drm_fb_helper_deferred_io, }; +static bool drm_fbdev_use_shadow_fb(struct drm_fb_helper *fb_helper) +{ + struct drm_device *dev = fb_helper->dev; + struct drm_framebuffer *fb = fb_helper->fb; + + return dev->mode_config.prefer_shadow_fbdev | + dev->mode_config.prefer_shadow | + !!fb->funcs->dirty; +} + /** * drm_fb_helper_generic...

DRM's fbdev console uses regular load and store operations to update framebuffer memory. The bochs driver on sparc64 requires the use of I/O-specific load and store operations. We have a workaround, but need a long-term solution to the problem. This patchset changes GEM's vmap/vunmap interfaces to forward pointers of type struct dma_buf_map and updates the generic fbdev emulation to use

DRM client buffers are permanently mapped throughout their lifetime. This prevents us from using generic framebuffer emulation for devices with small dedicated video memory, such as ast or mgag200. With fb buffers permanently mapped, such devices often won't have enough space left to display other content (e.g., X11). This patch set introduces unmappable DRM client buffers for framebuffer

DRM client buffers are permanently mapped throughout their lifetime. This prevents us from using generic framebuffer emulation for devices with small dedicated video memory, such as ast or mgag200. With fb buffers permanently mapped, such devices often won't have enough space left to display other content (e.g., X11). This patch set introduces unmappable DRM client buffers for framebuffer

...p(struct fb_info *info, struct vm_area_struct *vma) > return -ENODEV; > } > > +static bool drm_fbdev_use_iomem(struct fb_info *info) > +{ > + struct drm_fb_helper *fb_helper = info->par; > + struct drm_client_buffer *buffer = fb_helper->buffer; > + > + return !drm_fbdev_use_shadow_fb(fb_helper) && buffer->map.is_iomem; > +} > + > +static ssize_t fb_read_screen_base(struct fb_info *info, char __user *buf, size_t count, > + loff_t pos) > +{ > + const char __iomem *src = info->screen_base + pos; Maybe a bit much a bikeshed, but I'd write...

...p(struct fb_info *info, struct vm_area_struct *vma) > return -ENODEV; > } > > +static bool drm_fbdev_use_iomem(struct fb_info *info) > +{ > + struct drm_fb_helper *fb_helper = info->par; > + struct drm_client_buffer *buffer = fb_helper->buffer; > + > + return !drm_fbdev_use_shadow_fb(fb_helper) && buffer->map.is_iomem; > +} > + > +static ssize_t fb_read_screen_base(struct fb_info *info, char __user *buf, size_t count, > + loff_t pos) The naming here confused me - a name like: fb_read_iomem() would have helped me more. With the current naming I shal...

...27,6 +2026,206 @@ static int drm_fbdev_fb_mmap(struct fb_info *info, struct vm_area_struct *vma) return -ENODEV; } +static bool drm_fbdev_use_iomem(struct fb_info *info) +{ + struct drm_fb_helper *fb_helper = info->par; + struct drm_client_buffer *buffer = fb_helper->buffer; + + return !drm_fbdev_use_shadow_fb(fb_helper) && buffer->map.is_iomem; +} + +static ssize_t fb_read_screen_base(struct fb_info *info, char __user *buf, size_t count, + loff_t pos) +{ + const char __iomem *src = info->screen_base + pos; + size_t alloc_size = min(count, PAGE_SIZE); + ssize_t ret = 0; + char *tmp;...

...27,6 +2026,206 @@ static int drm_fbdev_fb_mmap(struct fb_info *info, struct vm_area_struct *vma) return -ENODEV; } +static bool drm_fbdev_use_iomem(struct fb_info *info) +{ + struct drm_fb_helper *fb_helper = info->par; + struct drm_client_buffer *buffer = fb_helper->buffer; + + return !drm_fbdev_use_shadow_fb(fb_helper) && buffer->map.is_iomem; +} + +static ssize_t fb_read_screen_base(struct fb_info *info, char __user *buf, size_t count, + loff_t pos) +{ + const char __iomem *src = info->screen_base + pos; + size_t alloc_size = min(count, PAGE_SIZE); + ssize_t ret = 0; + char *tmp;...