drm/fb: fix fbdev object model + cleanup properly.

The fbdev layer in the kms code should act like a consumer of the kms services and avoid having relying on information being store in the kms core structures in order for it to work.

This patch

a) removes the info pointer/psuedo palette from the core drm_framebuffer structure and moves it to the fbdev helper layer, it also removes the core drm keeping a list of kernel kms fbdevs.
b) migrated all the fb helper functions out of the crtc helper file into the fb helper file.
c) pushed the fb probing/hotplug control into the driver
d) makes the surface sizes into a structure for ease of passing
This changes the intel/radeon/nouveau drivers to use the new helper.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 122 insertions, 98 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_fb.c b/drivers/gpu/drm/radeon/radeon_fb.c
index 8fccbf2..a7e4c2a 100644
--- a/drivers/gpu/drm/radeon/radeon_fb.c
+++ b/drivers/gpu/drm/radeon/radeon_fb.c
@@ -41,10 +41,15 @@
 
 #include <linux/vga_switcheroo.h>
 
-struct radeon_fb_device {
+/* object hierarchy -
+   this contains a helper + a radeon fb
+   the helper contains a pointer to radeon framebuffer baseclass.
+*/
+struct radeon_kernel_fbdev {
 	struct drm_fb_helper helper;
-	struct radeon_framebuffer	*rfb;
-	struct radeon_device		*rdev;
+	struct radeon_framebuffer rfb;
+	struct list_head fbdev_list;
+	struct radeon_device *rdev;
 };
 
 static struct fb_ops radeonfb_ops = {
@@ -60,45 +65,6 @@ static struct fb_ops radeonfb_ops = {
 	.fb_setcmap = drm_fb_helper_setcmap,
 };
 
-/**
- * Currently it is assumed that the old framebuffer is reused.
- *
- * LOCKING
- * caller should hold the mode config lock.
- *
- */
-int radeonfb_resize(struct drm_device *dev, struct drm_crtc *crtc)
-{
-	struct fb_info *info;
-	struct drm_framebuffer *fb;
-	struct drm_display_mode *mode = crtc->desired_mode;
-
-	fb = crtc->fb;
-	if (fb == NULL) {
-		return 1;
-	}
-	info = fb->fbdev;
-	if (info == NULL) {
-		return 1;
-	}
-	if (mode == NULL) {
-		return 1;
-	}
-	info->var.xres = mode->hdisplay;
-	info->var.right_margin = mode->hsync_start - mode->hdisplay;
-	info->var.hsync_len = mode->hsync_end - mode->hsync_start;
-	info->var.left_margin = mode->htotal - mode->hsync_end;
-	info->var.yres = mode->vdisplay;
-	info->var.lower_margin = mode->vsync_start - mode->vdisplay;
-	info->var.vsync_len = mode->vsync_end - mode->vsync_start;
-	info->var.upper_margin = mode->vtotal - mode->vsync_end;
-	info->var.pixclock = 10000000 / mode->htotal * 1000 / mode->vtotal * 100;
-	/* avoid overflow */
-	info->var.pixclock = info->var.pixclock * 1000 / mode->vrefresh;
-
-	return 0;
-}
-EXPORT_SYMBOL(radeonfb_resize);
 
 static int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bool tiled)
 {
@@ -129,17 +95,14 @@ static struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 	.gamma_get = radeon_crtc_fb_gamma_get,
 };
 
-int radeonfb_create(struct drm_device *dev,
-		    uint32_t fb_width, uint32_t fb_height,
-		    uint32_t surface_width, uint32_t surface_height,
-		    uint32_t surface_depth, uint32_t surface_bpp,
-		    struct drm_framebuffer **fb_p)
+static int radeonfb_create(struct drm_device *dev,
+			   struct drm_fb_helper_surface_size *sizes,
+			   struct radeon_kernel_fbdev **rfbdev_p)
 {
 	struct radeon_device *rdev = dev->dev_private;
 	struct fb_info *info;
-	struct radeon_fb_device *rfbdev;
+	struct radeon_kernel_fbdev *rfbdev;
 	struct drm_framebuffer *fb = NULL;
-	struct radeon_framebuffer *rfb;
 	struct drm_mode_fb_cmd mode_cmd;
 	struct drm_gem_object *gobj = NULL;
 	struct radeon_bo *rbo = NULL;
@@ -151,17 +114,17 @@ int radeonfb_create(struct drm_device *dev,
 	bool fb_tiled = false; /* useful for testing */
 	u32 tiling_flags = 0;
 
-	mode_cmd.width = surface_width;
-	mode_cmd.height = surface_height;
+	mode_cmd.width = sizes->surface_width;
+	mode_cmd.height = sizes->surface_height;
 
 	/* avivo can't scanout real 24bpp */
-	if ((surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
-		surface_bpp = 32;
+	if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
+		sizes->surface_bpp = 32;
 
-	mode_cmd.bpp = surface_bpp;
+	mode_cmd.bpp = sizes->surface_bpp;
 	/* need to align pitch with crtc limits */
 	mode_cmd.pitch = radeon_align_pitch(rdev, mode_cmd.width, mode_cmd.bpp, fb_tiled) * ((mode_cmd.bpp + 1) / 8);
-	mode_cmd.depth = surface_depth;
+	mode_cmd.depth = sizes->surface_depth;
 
 	size = mode_cmd.pitch * mode_cmd.height;
 	aligned_size = ALIGN(size, PAGE_SIZE);
@@ -172,7 +135,7 @@ int radeonfb_create(struct drm_device *dev,
 			&gobj);
 	if (ret) {
 		printk(KERN_ERR "failed to allocate framebuffer (%d %d)\n",
-		       surface_width, surface_height);
+		       sizes->surface_width, sizes->surface_height);
 		ret = -ENOMEM;
 		goto out;
 	}
@@ -201,12 +164,7 @@ int radeonfb_create(struct drm_device *dev,
 			dev_err(rdev->dev, "FB failed to set tiling flags\n");
 	}
 	mutex_lock(&rdev->ddev->struct_mutex);
-	fb = radeon_framebuffer_create(rdev->ddev, &mode_cmd, gobj);
-	if (fb == NULL) {
-		DRM_ERROR("failed to allocate fb.\n");
-		ret = -ENOMEM;
-		goto out_unref;
-	}
+
 	ret = radeon_bo_reserve(rbo, false);
 	if (unlikely(ret != 0))
 		goto out_unref;
@@ -223,23 +181,25 @@ int radeonfb_create(struct drm_device *dev,
 		goto out_unref;
 	}
 
-	list_add(&fb->filp_head, &rdev->ddev->mode_config.fb_kernel_list);
-
-	*fb_p = fb;
-	rfb = to_radeon_framebuffer(fb);
-	rdev->fbdev_rfb = rfb;
-	rdev->fbdev_rbo = rbo;
-
-	info = framebuffer_alloc(sizeof(struct radeon_fb_device), device);
+	info = framebuffer_alloc(sizeof(struct radeon_kernel_fbdev), device);
 	if (info == NULL) {
 		ret = -ENOMEM;
 		goto out_unref;
 	}
 
-	rdev->fbdev_info = info;
 	rfbdev = info->par;
+	rfbdev->rdev = rdev;
+	radeon_framebuffer_init(dev, &rfbdev->rfb, &mode_cmd, gobj);
+	fb = &rfbdev->rfb.base;
+
+	/* setup helper */
+	rfbdev->helper.fb = fb;
+	rfbdev->helper.fbdev = info;
 	rfbdev->helper.funcs = &radeon_fb_helper_funcs;
 	rfbdev->helper.dev = dev;
+
+	*rfbdev_p = rfbdev;
+
 	ret = drm_fb_helper_init_crtc_count(&rfbdev->helper, rdev->num_crtc,
 					    RADEONFB_CONN_LIMIT);
 	if (ret)
@@ -260,7 +220,7 @@ int radeonfb_create(struct drm_device *dev,
 	info->screen_base = fbptr;
 	info->screen_size = size;
 
-	drm_fb_helper_fill_var(info, fb, fb_width, fb_height);
+	drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 
 	/* setup aperture base/size for vesafb takeover */
 	info->aperture_base = rdev->ddev->mode_config.fb_base;
@@ -283,9 +243,6 @@ int radeonfb_create(struct drm_device *dev,
 	DRM_INFO("fb depth is %d\n", fb->depth);
 	DRM_INFO("   pitch is %d\n", fb->pitch);
 
-	fb->fbdev = info;
-	rfbdev->rfb = rfb;
-	rfbdev->rdev = rdev;
 
 	mutex_unlock(&rdev->ddev->struct_mutex);
 	vga_switcheroo_client_fb_set(rdev->ddev->pdev, info);
@@ -300,7 +257,6 @@ out_unref:
 		}
 	}
 	if (fb && ret) {
-		list_del(&fb->filp_head);
 		drm_gem_object_unreference(gobj);
 		drm_framebuffer_cleanup(fb);
 		kfree(fb);
@@ -311,6 +267,35 @@ out:
 	return ret;
 }
 
+static int radeon_fb_find_or_create_single(struct drm_device *dev,
+					   struct drm_fb_helper_surface_size *sizes,
+					   struct drm_fb_helper **fb_ptr)
+{
+	struct radeon_device *rdev = dev->dev_private;
+	struct radeon_kernel_fbdev *rfbdev = NULL;
+	int new_fb = 0;
+	int ret;
+
+	if (!rdev->mode_info.rfbdev) {
+		ret = radeonfb_create(dev, sizes,
+				      &rfbdev);
+		if (ret)
+			return ret;
+		rdev->mode_info.rfbdev = rfbdev;
+		new_fb = 1;
+	} else {
+		rfbdev = rdev->mode_info.rfbdev;
+		if (rfbdev->rfb.base.width < sizes->surface_width ||
+		    rfbdev->rfb.base.height < sizes->surface_height) {
+			DRM_ERROR("Framebuffer not large enough to scale console onto.\n");
+			return -EINVAL;
+		}
+	}
+
+	*fb_ptr = &rfbdev->helper;
+	return new_fb;
+}
+
 static char *mode_option;
 int radeon_parse_options(char *options)
 {
@@ -327,7 +312,7 @@ int radeon_parse_options(char *options)
 	return 0;
 }
 
-int radeonfb_probe(struct drm_device *dev)
+static int radeonfb_probe(struct drm_device *dev)
 {
 	struct radeon_device *rdev = dev->dev_private;
 	int bpp_sel = 32;
@@ -336,37 +321,76 @@ int radeonfb_probe(struct drm_device *dev)
 	if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32*1024*1024))
 		bpp_sel = 8;
 
-	return drm_fb_helper_single_fb_probe(dev, bpp_sel, &radeonfb_create);
+	return drm_fb_helper_single_fb_probe(dev, bpp_sel, &radeon_fb_find_or_create_single);
+}
+
+void radeonfb_hotplug(struct drm_device *dev)
+{
+	drm_helper_fb_hotplug_event(dev);
+
+	radeonfb_probe(dev);
 }
 
-int radeonfb_remove(struct drm_device *dev, struct drm_framebuffer *fb)
+static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_kernel_fbdev *rfbdev)
 {
 	struct fb_info *info;
-	struct radeon_framebuffer *rfb = to_radeon_framebuffer(fb);
+	struct radeon_framebuffer *rfb = &rfbdev->rfb;
 	struct radeon_bo *rbo;
 	int r;
 
-	if (!fb) {
-		return -EINVAL;
-	}
-	info = fb->fbdev;
-	if (info) {
-		struct radeon_fb_device *rfbdev = info->par;
-		rbo = rfb->obj->driver_private;
-		unregister_framebuffer(info);
-		r = radeon_bo_reserve(rbo, false);
-		if (likely(r == 0)) {
-			radeon_bo_kunmap(rbo);
-			radeon_bo_unpin(rbo);
-			radeon_bo_unreserve(rbo);
-		}
-		drm_fb_helper_free(&rfbdev->helper);
-		framebuffer_release(info);
+	rbo = rfb->obj->driver_private;
+	info = rfbdev->helper.fbdev;
+	unregister_framebuffer(info);
+	r = radeon_bo_reserve(rbo, false);
+	if (likely(r == 0)) {
+		radeon_bo_kunmap(rbo);
+		radeon_bo_unpin(rbo);
+		radeon_bo_unreserve(rbo);
 	}
 
-	printk(KERN_INFO "unregistered panic notifier\n");
+	drm_fb_helper_free(&rfbdev->helper);
+	drm_framebuffer_cleanup(&rfb->base);
+	if (rfb->obj)
+		drm_gem_object_unreference_unlocked(rfb->obj);
+
+	framebuffer_release(info);
 
 	return 0;
 }
-EXPORT_SYMBOL(radeonfb_remove);
 MODULE_LICENSE("GPL");
+
+int radeon_fbdev_init(struct radeon_device *rdev)
+{
+	drm_helper_initial_config(rdev->ddev);
+	radeonfb_probe(rdev->ddev);
+	return 0;
+}
+
+void radeon_fbdev_fini(struct radeon_device *rdev)
+{
+	radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
+	rdev->mode_info.rfbdev = NULL;
+}
+
+void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
+{
+	fb_set_suspend(rdev->mode_info.rfbdev->helper.fbdev, state);
+}
+
+int radeon_fbdev_total_size(struct radeon_device *rdev)
+{
+	struct radeon_bo *robj;
+	int size = 0;
+
+	robj = rdev->mode_info.rfbdev->rfb.obj->driver_private;
+	size += radeon_bo_size(robj);
+	return size;
+}
+
+bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
+{
+	if (robj == rdev->mode_info.rfbdev->rfb.obj->driver_private)
+		return true;
+	return false;
+}
+