drm/nouveau/fbcon: make use of drm_fb_helper.fb

Transitional step towards properly refcounting the fbcon fb.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_fbcon.c

@@ -337,12 +337,11 @@ nouveau_fbcon_create(struct drm_fb_helper *helper,
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nvif_device *device = &drm->device;
 	struct fb_info *info;
-	struct drm_framebuffer *fb;
-	struct nouveau_framebuffer *nouveau_fb;
+	struct nouveau_framebuffer *fb;
 	struct nouveau_channel *chan;
 	struct nouveau_bo *nvbo;
 	struct drm_mode_fb_cmd2 mode_cmd;
-	int size, ret;
+	int ret;
 
 	mode_cmd.width = sizes->surface_width;
 	mode_cmd.height = sizes->surface_height;
@@ -353,16 +352,16 @@ nouveau_fbcon_create(struct drm_fb_helper *helper,
 	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 							  sizes->surface_depth);
 
-	size = mode_cmd.pitches[0] * mode_cmd.height;
-	size = roundup(size, PAGE_SIZE);
-
-	ret = nouveau_gem_new(dev, size, 0, NOUVEAU_GEM_DOMAIN_VRAM,
-			      0, 0x0000, &nvbo);
+	ret = nouveau_gem_new(dev, mode_cmd.pitches[0] * mode_cmd.height,
+			      0, NOUVEAU_GEM_DOMAIN_VRAM, 0, 0x0000, &nvbo);
 	if (ret) {
 		NV_ERROR(drm, "failed to allocate framebuffer\n");
 		goto out;
 	}
 
+	nouveau_framebuffer_init(dev, &fbcon->fb, &mode_cmd, nvbo);
+	fb = &fbcon->fb;
+
 	ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM, false);
 	if (ret) {
 		NV_ERROR(drm, "failed to pin fb: %d\n", ret);
@@ -377,8 +376,7 @@ nouveau_fbcon_create(struct drm_fb_helper *helper,
 
 	chan = nouveau_nofbaccel ? NULL : drm->channel;
 	if (chan && device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
-		ret = nouveau_bo_vma_add(nvbo, drm->client.vm,
-					&fbcon->nouveau_fb.vma);
+		ret = nouveau_bo_vma_add(nvbo, drm->client.vm, &fb->vma);
 		if (ret) {
 			NV_ERROR(drm, "failed to map fb into chan: %d\n", ret);
 			chan = NULL;
@@ -394,13 +392,8 @@ nouveau_fbcon_create(struct drm_fb_helper *helper,
 
 	info->par = fbcon;
 
-	nouveau_framebuffer_init(dev, &fbcon->nouveau_fb, &mode_cmd, nvbo);
-
-	nouveau_fb = &fbcon->nouveau_fb;
-	fb = &nouveau_fb->base;
-
 	/* setup helper */
-	fbcon->helper.fb = fb;
+	fbcon->helper.fb = &fb->base;
 
 	strcpy(info->fix.id, "nouveaufb");
 	if (!chan)
@@ -411,14 +404,14 @@ nouveau_fbcon_create(struct drm_fb_helper *helper,
 			      FBINFO_HWACCEL_IMAGEBLIT;
 	info->flags |= FBINFO_CAN_FORCE_OUTPUT;
 	info->fbops = &nouveau_fbcon_sw_ops;
-	info->fix.smem_start = nvbo->bo.mem.bus.base +
-			       nvbo->bo.mem.bus.offset;
-	info->fix.smem_len = size;
+	info->fix.smem_start = fb->nvbo->bo.mem.bus.base +
+			       fb->nvbo->bo.mem.bus.offset;
+	info->fix.smem_len = fb->nvbo->bo.mem.num_pages << PAGE_SHIFT;
 
-	info->screen_base = nvbo_kmap_obj_iovirtual(nouveau_fb->nvbo);
-	info->screen_size = size;
+	info->screen_base = nvbo_kmap_obj_iovirtual(fb->nvbo);
+	info->screen_size = fb->nvbo->bo.mem.num_pages << PAGE_SHIFT;
 
-	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
+	drm_fb_helper_fill_fix(info, fb->base.pitches[0], fb->base.depth);
 	drm_fb_helper_fill_var(info, &fbcon->helper, sizes->fb_width, sizes->fb_height);
 
 	/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
@@ -429,20 +422,19 @@ nouveau_fbcon_create(struct drm_fb_helper *helper,
 
 	/* To allow resizeing without swapping buffers */
 	NV_INFO(drm, "allocated %dx%d fb: 0x%llx, bo %p\n",
-		nouveau_fb->base.width, nouveau_fb->base.height,
-		nvbo->bo.offset, nvbo);
+		fb->base.width, fb->base.height, fb->nvbo->bo.offset, nvbo);
 
 	vga_switcheroo_client_fb_set(dev->pdev, info);
 	return 0;
 
 out_unlock:
 	if (chan)
-		nouveau_bo_vma_del(nvbo, &fbcon->nouveau_fb.vma);
-	nouveau_bo_unmap(nvbo);
+		nouveau_bo_vma_del(fb->nvbo, &fb->vma);
+	nouveau_bo_unmap(fb->nvbo);
 out_unpin:
-	nouveau_bo_unpin(nvbo);
+	nouveau_bo_unpin(fb->nvbo);
 out_unref:
-	nouveau_bo_ref(NULL, &nvbo);
+	nouveau_bo_ref(NULL, &fb->nvbo);
 out:
 	return ret;
 }
@@ -458,14 +450,14 @@ nouveau_fbcon_output_poll_changed(struct drm_device *dev)
 static int
 nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *fbcon)
 {
-	struct nouveau_framebuffer *nouveau_fb = &fbcon->nouveau_fb;
+	struct nouveau_framebuffer *nouveau_fb = nouveau_framebuffer(fbcon->helper.fb);
 
 	drm_fb_helper_unregister_fbi(&fbcon->helper);
 	drm_fb_helper_release_fbi(&fbcon->helper);
 
 	if (nouveau_fb->nvbo) {
-		nouveau_bo_unmap(nouveau_fb->nvbo);
 		nouveau_bo_vma_del(nouveau_fb->nvbo, &nouveau_fb->vma);
+		nouveau_bo_unmap(nouveau_fb->nvbo);
 		nouveau_bo_unpin(nouveau_fb->nvbo);
 		drm_gem_object_unreference_unlocked(&nouveau_fb->nvbo->gem);
 		nouveau_fb->nvbo = NULL;

drivers/gpu/drm/nouveau/nouveau_fbcon.h

@@ -33,7 +33,7 @@
 
 struct nouveau_fbdev {
 	struct drm_fb_helper helper;
-	struct nouveau_framebuffer nouveau_fb;
+	struct nouveau_framebuffer fb;
 	unsigned int saved_flags;
 	struct nvif_object surf2d;
 	struct nvif_object clip;

drivers/gpu/drm/nouveau/nv50_fbcon.c

@@ -148,7 +148,7 @@ int
 nv50_fbcon_accel_init(struct fb_info *info)
 {
 	struct nouveau_fbdev *nfbdev = info->par;
-	struct nouveau_framebuffer *fb = &nfbdev->nouveau_fb;
+	struct nouveau_framebuffer *fb = nouveau_framebuffer(nfbdev->helper.fb);
 	struct drm_device *dev = nfbdev->helper.dev;
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nouveau_channel *chan = drm->channel;

drivers/gpu/drm/nouveau/nvc0_fbcon.c

@@ -149,7 +149,7 @@ nvc0_fbcon_accel_init(struct fb_info *info)
 {
 	struct nouveau_fbdev *nfbdev = info->par;
 	struct drm_device *dev = nfbdev->helper.dev;
-	struct nouveau_framebuffer *fb = &nfbdev->nouveau_fb;
+	struct nouveau_framebuffer *fb = nouveau_framebuffer(nfbdev->helper.fb);
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nouveau_channel *chan = drm->channel;
 	int ret, format;