diff options
| author | Thomas Zimmermann <tzimmermann@suse.de> | 2020-11-03 10:30:13 +0100 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2020-11-09 09:19:45 +0100 |
| commit | a85955568939e20e573cf42095d90c8476c9cec1 (patch) | |
| tree | d0e49d4349651ea4f7d6b0d0b338cc6d7aa76e9f /drivers/gpu/drm/drm_fb_helper.c | |
| parent | a745fb1c26d3802caad532a4675f43a661f01fa6 (diff) | |
drm/gem: Store client buffer mappings as struct dma_buf_map
Kernel DRM clients now store their framebuffer address in an instance
of struct dma_buf_map. Depending on the buffer's location, the address
refers to system or I/O memory.
Callers of drm_client_buffer_vmap() receive a copy of the value in
the call's supplied arguments. It can be accessed and modified with
dma_buf_map interfaces.
v6:
* don't call page_to_phys() on framebuffers in I/O memory;
warn instead (Daniel)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Tested-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20201103093015.1063-9-tzimmermann@suse.de
Diffstat (limited to 'drivers/gpu/drm/drm_fb_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_fb_helper.c | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 92e0db30fdf7..a0d88130fedb 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -378,7 +378,7 @@ static void drm_fb_helper_dirty_blit_real(struct drm_fb_helper *fb_helper, unsigned int cpp = fb->format->cpp[0]; size_t offset = clip->y1 * fb->pitches[0] + clip->x1 * cpp; void *src = fb_helper->fbdev->screen_buffer + offset; - void *dst = fb_helper->buffer->vaddr + offset; + void *dst = fb_helper->buffer->map.vaddr + offset; size_t len = (clip->x2 - clip->x1) * cpp; unsigned int y; @@ -400,7 +400,8 @@ static void drm_fb_helper_dirty_work(struct work_struct *work) struct drm_clip_rect *clip = &helper->dirty_clip; struct drm_clip_rect clip_copy; unsigned long flags; - void *vaddr; + struct dma_buf_map map; + int ret; spin_lock_irqsave(&helper->dirty_lock, flags); clip_copy = *clip; @@ -413,8 +414,8 @@ static void drm_fb_helper_dirty_work(struct work_struct *work) /* Generic fbdev uses a shadow buffer */ if (helper->buffer) { - vaddr = drm_client_buffer_vmap(helper->buffer); - if (IS_ERR(vaddr)) + ret = drm_client_buffer_vmap(helper->buffer, &map); + if (ret) return; drm_fb_helper_dirty_blit_real(helper, &clip_copy); } @@ -2060,7 +2061,8 @@ static int drm_fb_helper_generic_probe(struct drm_fb_helper *fb_helper, struct drm_framebuffer *fb; struct fb_info *fbi; u32 format; - void *vaddr; + struct dma_buf_map map; + int ret; drm_dbg_kms(dev, "surface width(%d), height(%d) and bpp(%d)\n", sizes->surface_width, sizes->surface_height, @@ -2096,14 +2098,22 @@ static int drm_fb_helper_generic_probe(struct drm_fb_helper *fb_helper, fb_deferred_io_init(fbi); } else { /* buffer is mapped for HW framebuffer */ - vaddr = drm_client_buffer_vmap(fb_helper->buffer); - if (IS_ERR(vaddr)) - return PTR_ERR(vaddr); + ret = drm_client_buffer_vmap(fb_helper->buffer, &map); + if (ret) + return ret; + if (map.is_iomem) + fbi->screen_base = map.vaddr_iomem; + else + fbi->screen_buffer = map.vaddr; - fbi->screen_buffer = vaddr; - /* Shamelessly leak the physical address to user-space */ + /* + * Shamelessly leak the physical address to user-space. As + * page_to_phys() is undefined for I/O memory, warn in this + * case. + */ #if IS_ENABLED(CONFIG_DRM_FBDEV_LEAK_PHYS_SMEM) - if (drm_leak_fbdev_smem && fbi->fix.smem_start == 0) + if (drm_leak_fbdev_smem && fbi->fix.smem_start == 0 && + !drm_WARN_ON_ONCE(dev, map.is_iomem)) fbi->fix.smem_start = page_to_phys(virt_to_page(fbi->screen_buffer)); #endif |