| /* |
| * Copyright 2010 Matt Turner. |
| * Copyright 2012 Red Hat |
| * |
| * This file is subject to the terms and conditions of the GNU General |
| * Public License version 2. See the file COPYING in the main |
| * directory of this archive for more details. |
| * |
| * Authors: Matthew Garrett |
| * Matt Turner |
| * Dave Airlie |
| */ |
| #include <linux/module.h> |
| #include <drm/drmP.h> |
| #include <drm/drm_fb_helper.h> |
| #include <drm/drm_crtc_helper.h> |
| |
| #include <linux/fb.h> |
| |
| #include "mgag200_drv.h" |
| |
| static void mga_dirty_update(struct mga_fbdev *mfbdev, |
| int x, int y, int width, int height) |
| { |
| int i; |
| struct drm_gem_object *obj; |
| struct mgag200_bo *bo; |
| int src_offset, dst_offset; |
| int bpp = (mfbdev->mfb.base.bits_per_pixel + 7)/8; |
| int ret = -EBUSY; |
| bool unmap = false; |
| bool store_for_later = false; |
| int x2, y2; |
| unsigned long flags; |
| |
| obj = mfbdev->mfb.obj; |
| bo = gem_to_mga_bo(obj); |
| |
| /* |
| * try and reserve the BO, if we fail with busy |
| * then the BO is being moved and we should |
| * store up the damage until later. |
| */ |
| if (drm_can_sleep()) |
| ret = mgag200_bo_reserve(bo, true); |
| if (ret) { |
| if (ret != -EBUSY) |
| return; |
| |
| store_for_later = true; |
| } |
| |
| x2 = x + width - 1; |
| y2 = y + height - 1; |
| spin_lock_irqsave(&mfbdev->dirty_lock, flags); |
| |
| if (mfbdev->y1 < y) |
| y = mfbdev->y1; |
| if (mfbdev->y2 > y2) |
| y2 = mfbdev->y2; |
| if (mfbdev->x1 < x) |
| x = mfbdev->x1; |
| if (mfbdev->x2 > x2) |
| x2 = mfbdev->x2; |
| |
| if (store_for_later) { |
| mfbdev->x1 = x; |
| mfbdev->x2 = x2; |
| mfbdev->y1 = y; |
| mfbdev->y2 = y2; |
| spin_unlock_irqrestore(&mfbdev->dirty_lock, flags); |
| return; |
| } |
| |
| mfbdev->x1 = mfbdev->y1 = INT_MAX; |
| mfbdev->x2 = mfbdev->y2 = 0; |
| spin_unlock_irqrestore(&mfbdev->dirty_lock, flags); |
| |
| if (!bo->kmap.virtual) { |
| ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap); |
| if (ret) { |
| DRM_ERROR("failed to kmap fb updates\n"); |
| mgag200_bo_unreserve(bo); |
| return; |
| } |
| unmap = true; |
| } |
| for (i = y; i <= y2; i++) { |
| /* assume equal stride for now */ |
| src_offset = dst_offset = i * mfbdev->mfb.base.pitches[0] + (x * bpp); |
| memcpy_toio(bo->kmap.virtual + src_offset, mfbdev->sysram + src_offset, (x2 - x + 1) * bpp); |
| |
| } |
| if (unmap) |
| ttm_bo_kunmap(&bo->kmap); |
| |
| mgag200_bo_unreserve(bo); |
| } |
| |
| static void mga_fillrect(struct fb_info *info, |
| const struct fb_fillrect *rect) |
| { |
| struct mga_fbdev *mfbdev = info->par; |
| sys_fillrect(info, rect); |
| mga_dirty_update(mfbdev, rect->dx, rect->dy, rect->width, |
| rect->height); |
| } |
| |
| static void mga_copyarea(struct fb_info *info, |
| const struct fb_copyarea *area) |
| { |
| struct mga_fbdev *mfbdev = info->par; |
| sys_copyarea(info, area); |
| mga_dirty_update(mfbdev, area->dx, area->dy, area->width, |
| area->height); |
| } |
| |
| static void mga_imageblit(struct fb_info *info, |
| const struct fb_image *image) |
| { |
| struct mga_fbdev *mfbdev = info->par; |
| sys_imageblit(info, image); |
| mga_dirty_update(mfbdev, image->dx, image->dy, image->width, |
| image->height); |
| } |
| |
| |
| static struct fb_ops mgag200fb_ops = { |
| .owner = THIS_MODULE, |
| .fb_check_var = drm_fb_helper_check_var, |
| .fb_set_par = drm_fb_helper_set_par, |
| .fb_fillrect = mga_fillrect, |
| .fb_copyarea = mga_copyarea, |
| .fb_imageblit = mga_imageblit, |
| .fb_pan_display = drm_fb_helper_pan_display, |
| .fb_blank = drm_fb_helper_blank, |
| .fb_setcmap = drm_fb_helper_setcmap, |
| }; |
| |
| static int mgag200fb_create_object(struct mga_fbdev *afbdev, |
| struct drm_mode_fb_cmd2 *mode_cmd, |
| struct drm_gem_object **gobj_p) |
| { |
| struct drm_device *dev = afbdev->helper.dev; |
| u32 size; |
| struct drm_gem_object *gobj; |
| int ret = 0; |
| |
| size = mode_cmd->pitches[0] * mode_cmd->height; |
| ret = mgag200_gem_create(dev, size, true, &gobj); |
| if (ret) |
| return ret; |
| |
| *gobj_p = gobj; |
| return ret; |
| } |
| |
| static int mgag200fb_create(struct drm_fb_helper *helper, |
| struct drm_fb_helper_surface_size *sizes) |
| { |
| struct mga_fbdev *mfbdev = |
| container_of(helper, struct mga_fbdev, helper); |
| struct drm_device *dev = mfbdev->helper.dev; |
| struct drm_mode_fb_cmd2 mode_cmd; |
| struct mga_device *mdev = dev->dev_private; |
| struct fb_info *info; |
| struct drm_framebuffer *fb; |
| struct drm_gem_object *gobj = NULL; |
| struct device *device = &dev->pdev->dev; |
| int ret; |
| void *sysram; |
| int size; |
| |
| mode_cmd.width = sizes->surface_width; |
| mode_cmd.height = sizes->surface_height; |
| mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8); |
| |
| mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, |
| sizes->surface_depth); |
| size = mode_cmd.pitches[0] * mode_cmd.height; |
| |
| ret = mgag200fb_create_object(mfbdev, &mode_cmd, &gobj); |
| if (ret) { |
| DRM_ERROR("failed to create fbcon backing object %d\n", ret); |
| return ret; |
| } |
| |
| sysram = vmalloc(size); |
| if (!sysram) |
| return -ENOMEM; |
| |
| info = framebuffer_alloc(0, device); |
| if (info == NULL) |
| return -ENOMEM; |
| |
| info->par = mfbdev; |
| |
| ret = mgag200_framebuffer_init(dev, &mfbdev->mfb, &mode_cmd, gobj); |
| if (ret) |
| return ret; |
| |
| mfbdev->sysram = sysram; |
| mfbdev->size = size; |
| |
| fb = &mfbdev->mfb.base; |
| |
| /* setup helper */ |
| mfbdev->helper.fb = fb; |
| mfbdev->helper.fbdev = info; |
| |
| ret = fb_alloc_cmap(&info->cmap, 256, 0); |
| if (ret) { |
| DRM_ERROR("%s: can't allocate color map\n", info->fix.id); |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| strcpy(info->fix.id, "mgadrmfb"); |
| |
| info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT; |
| info->fbops = &mgag200fb_ops; |
| |
| /* setup aperture base/size for vesafb takeover */ |
| info->apertures = alloc_apertures(1); |
| if (!info->apertures) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| info->apertures->ranges[0].base = mdev->dev->mode_config.fb_base; |
| info->apertures->ranges[0].size = mdev->mc.vram_size; |
| |
| drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); |
| drm_fb_helper_fill_var(info, &mfbdev->helper, sizes->fb_width, |
| sizes->fb_height); |
| |
| info->screen_base = sysram; |
| info->screen_size = size; |
| info->pixmap.flags = FB_PIXMAP_SYSTEM; |
| |
| DRM_DEBUG_KMS("allocated %dx%d\n", |
| fb->width, fb->height); |
| return 0; |
| out: |
| return ret; |
| } |
| |
| static int mga_fbdev_destroy(struct drm_device *dev, |
| struct mga_fbdev *mfbdev) |
| { |
| struct fb_info *info; |
| struct mga_framebuffer *mfb = &mfbdev->mfb; |
| |
| if (mfbdev->helper.fbdev) { |
| info = mfbdev->helper.fbdev; |
| |
| unregister_framebuffer(info); |
| if (info->cmap.len) |
| fb_dealloc_cmap(&info->cmap); |
| framebuffer_release(info); |
| } |
| |
| if (mfb->obj) { |
| drm_gem_object_unreference_unlocked(mfb->obj); |
| mfb->obj = NULL; |
| } |
| drm_fb_helper_fini(&mfbdev->helper); |
| vfree(mfbdev->sysram); |
| drm_framebuffer_unregister_private(&mfb->base); |
| drm_framebuffer_cleanup(&mfb->base); |
| |
| return 0; |
| } |
| |
| static const struct drm_fb_helper_funcs mga_fb_helper_funcs = { |
| .gamma_set = mga_crtc_fb_gamma_set, |
| .gamma_get = mga_crtc_fb_gamma_get, |
| .fb_probe = mgag200fb_create, |
| }; |
| |
| int mgag200_fbdev_init(struct mga_device *mdev) |
| { |
| struct mga_fbdev *mfbdev; |
| int ret; |
| int bpp_sel = 32; |
| |
| /* prefer 16bpp on low end gpus with limited VRAM */ |
| if (IS_G200_SE(mdev) && mdev->mc.vram_size < (2048*1024)) |
| bpp_sel = 16; |
| |
| mfbdev = devm_kzalloc(mdev->dev->dev, sizeof(struct mga_fbdev), GFP_KERNEL); |
| if (!mfbdev) |
| return -ENOMEM; |
| |
| mdev->mfbdev = mfbdev; |
| spin_lock_init(&mfbdev->dirty_lock); |
| |
| drm_fb_helper_prepare(mdev->dev, &mfbdev->helper, &mga_fb_helper_funcs); |
| |
| ret = drm_fb_helper_init(mdev->dev, &mfbdev->helper, |
| mdev->num_crtc, MGAG200FB_CONN_LIMIT); |
| if (ret) |
| return ret; |
| |
| ret = drm_fb_helper_single_add_all_connectors(&mfbdev->helper); |
| if (ret) |
| goto fini; |
| |
| /* disable all the possible outputs/crtcs before entering KMS mode */ |
| drm_helper_disable_unused_functions(mdev->dev); |
| |
| ret = drm_fb_helper_initial_config(&mfbdev->helper, bpp_sel); |
| if (ret) |
| goto fini; |
| |
| return 0; |
| |
| fini: |
| drm_fb_helper_fini(&mfbdev->helper); |
| return ret; |
| } |
| |
| void mgag200_fbdev_fini(struct mga_device *mdev) |
| { |
| if (!mdev->mfbdev) |
| return; |
| |
| mga_fbdev_destroy(mdev->dev, mdev->mfbdev); |
| } |