1 files changed, 422 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_fbdev.c b/drivers/gpu/drm/radeon/radeon_fbdev.c
new file mode 100644
index 000000000000..fe76e29910ef
--- /dev/null
+++ b/drivers/gpu/drm/radeon/radeon_fbdev.c
@@ -0,0 +1,422 @@
+/*
+ * Copyright © 2007 David Airlie
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *     David Airlie
+ */
+
+#include <linux/pci.h>
+#include <linux/pm_runtime.h>
+#include <linux/vga_switcheroo.h>
+
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+
+#include "radeon.h"
+
+static void radeon_fbdev_destroy_pinned_object(struct drm_gem_object *gobj)
+{
+	struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
+	int ret;
+
+	ret = radeon_bo_reserve(rbo, false);
+	if (likely(ret == 0)) {
+		radeon_bo_kunmap(rbo);
+		radeon_bo_unpin(rbo);
+		radeon_bo_unreserve(rbo);
+	}
+	drm_gem_object_put(gobj);
+}
+
+static int radeon_fbdev_create_pinned_object(struct drm_fb_helper *fb_helper,
+					     struct drm_mode_fb_cmd2 *mode_cmd,
+					     struct drm_gem_object **gobj_p)
+{
+	const struct drm_format_info *info;
+	struct radeon_device *rdev = fb_helper->dev->dev_private;
+	struct drm_gem_object *gobj = NULL;
+	struct radeon_bo *rbo = NULL;
+	bool fb_tiled = false; /* useful for testing */
+	u32 tiling_flags = 0;
+	int ret;
+	int aligned_size, size;
+	int height = mode_cmd->height;
+	u32 cpp;
+
+	info = drm_get_format_info(rdev->ddev, mode_cmd);
+	cpp = info->cpp[0];
+
+	/* need to align pitch with crtc limits */
+	mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, cpp,
+						  fb_tiled);
+
+	if (rdev->family >= CHIP_R600)
+		height = ALIGN(mode_cmd->height, 8);
+	size = mode_cmd->pitches[0] * height;
+	aligned_size = ALIGN(size, PAGE_SIZE);
+	ret = radeon_gem_object_create(rdev, aligned_size, 0,
+				       RADEON_GEM_DOMAIN_VRAM,
+				       0, true, &gobj);
+	if (ret) {
+		pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
+		return -ENOMEM;
+	}
+	rbo = gem_to_radeon_bo(gobj);
+
+	if (fb_tiled)
+		tiling_flags = RADEON_TILING_MACRO;
+
+#ifdef __BIG_ENDIAN
+	switch (cpp) {
+	case 4:
+		tiling_flags |= RADEON_TILING_SWAP_32BIT;
+		break;
+	case 2:
+		tiling_flags |= RADEON_TILING_SWAP_16BIT;
+		break;
+	default:
+		break;
+	}
+#endif
+
+	if (tiling_flags) {
+		ret = radeon_bo_set_tiling_flags(rbo,
+						 tiling_flags | RADEON_TILING_SURFACE,
+						 mode_cmd->pitches[0]);
+		if (ret)
+			dev_err(rdev->dev, "FB failed to set tiling flags\n");
+	}
+
+	ret = radeon_bo_reserve(rbo, false);
+	if (unlikely(ret != 0))
+		goto err_radeon_fbdev_destroy_pinned_object;
+	/* Only 27 bit offset for legacy CRTC */
+	ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
+				       ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
+				       NULL);
+	if (ret) {
+		radeon_bo_unreserve(rbo);
+		goto err_radeon_fbdev_destroy_pinned_object;
+	}
+	if (fb_tiled)
+		radeon_bo_check_tiling(rbo, 0, 0);
+	ret = radeon_bo_kmap(rbo, NULL);
+	radeon_bo_unreserve(rbo);
+	if (ret)
+		goto err_radeon_fbdev_destroy_pinned_object;
+
+	*gobj_p = gobj;
+	return 0;
+
+err_radeon_fbdev_destroy_pinned_object:
+	radeon_fbdev_destroy_pinned_object(gobj);
+	*gobj_p = NULL;
+	return ret;
+}
+
+/*
+ * Fbdev ops and struct fb_ops
+ */
+
+static int radeon_fbdev_fb_open(struct fb_info *info, int user)
+{
+	struct drm_fb_helper *fb_helper = info->par;
+	struct radeon_device *rdev = fb_helper->dev->dev_private;
+	int ret;
+
+	ret = pm_runtime_get_sync(rdev->ddev->dev);
+	if (ret < 0 && ret != -EACCES)
+		goto err_pm_runtime_mark_last_busy;
+
+	return 0;
+
+err_pm_runtime_mark_last_busy:
+	pm_runtime_mark_last_busy(rdev->ddev->dev);
+	pm_runtime_put_autosuspend(rdev->ddev->dev);
+	return ret;
+}
+
+static int radeon_fbdev_fb_release(struct fb_info *info, int user)
+{
+	struct drm_fb_helper *fb_helper = info->par;
+	struct radeon_device *rdev = fb_helper->dev->dev_private;
+
+	pm_runtime_mark_last_busy(rdev->ddev->dev);
+	pm_runtime_put_autosuspend(rdev->ddev->dev);
+
+	return 0;
+}
+
+static void radeon_fbdev_fb_destroy(struct fb_info *info)
+{
+	struct drm_fb_helper *fb_helper = info->par;
+	struct drm_framebuffer *fb = fb_helper->fb;
+	struct drm_gem_object *gobj = drm_gem_fb_get_obj(fb, 0);
+
+	drm_fb_helper_fini(fb_helper);
+
+	drm_framebuffer_unregister_private(fb);
+	drm_framebuffer_cleanup(fb);
+	kfree(fb);
+	radeon_fbdev_destroy_pinned_object(gobj);
+
+	drm_client_release(&fb_helper->client);
+	drm_fb_helper_unprepare(fb_helper);
+	kfree(fb_helper);
+}
+
+static const struct fb_ops radeon_fbdev_fb_ops = {
+	.owner = THIS_MODULE,
+	DRM_FB_HELPER_DEFAULT_OPS,
+	.fb_open = radeon_fbdev_fb_open,
+	.fb_release = radeon_fbdev_fb_release,
+	.fb_read = drm_fb_helper_cfb_read,
+	.fb_write = drm_fb_helper_cfb_write,
+	.fb_fillrect = drm_fb_helper_cfb_fillrect,
+	.fb_copyarea = drm_fb_helper_cfb_copyarea,
+	.fb_imageblit = drm_fb_helper_cfb_imageblit,
+	.fb_destroy = radeon_fbdev_fb_destroy,
+};
+
+/*
+ * Fbdev helpers and struct drm_fb_helper_funcs
+ */
+
+static int radeon_fbdev_fb_helper_fb_probe(struct drm_fb_helper *fb_helper,
+					   struct drm_fb_helper_surface_size *sizes)
+{
+	struct radeon_device *rdev = fb_helper->dev->dev_private;
+	struct drm_mode_fb_cmd2 mode_cmd = { };
+	struct fb_info *info;
+	struct drm_gem_object *gobj;
+	struct radeon_bo *rbo;
+	struct drm_framebuffer *fb;
+	int ret;
+	unsigned long tmp;
+
+	mode_cmd.width = sizes->surface_width;
+	mode_cmd.height = sizes->surface_height;
+
+	/* avivo can't scanout real 24bpp */
+	if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
+		sizes->surface_bpp = 32;
+
+	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
+							  sizes->surface_depth);
+
+	ret = radeon_fbdev_create_pinned_object(fb_helper, &mode_cmd, &gobj);
+	if (ret) {
+		DRM_ERROR("failed to create fbcon object %d\n", ret);
+		return ret;
+	}
+	rbo = gem_to_radeon_bo(gobj);
+
+	fb = kzalloc(sizeof(*fb), GFP_KERNEL);
+	if (!fb) {
+		ret = -ENOMEM;
+		goto err_radeon_fbdev_destroy_pinned_object;
+	}
+	ret = radeon_framebuffer_init(rdev->ddev, fb, &mode_cmd, gobj);
+	if (ret) {
+		DRM_ERROR("failed to initialize framebuffer %d\n", ret);
+		goto err_kfree;
+	}
+
+	/* setup helper */
+	fb_helper->fb = fb;
+
+	/* okay we have an object now allocate the framebuffer */
+	info = drm_fb_helper_alloc_info(fb_helper);
+	if (IS_ERR(info)) {
+		ret = PTR_ERR(info);
+		goto err_drm_framebuffer_unregister_private;
+	}
+
+	info->fbops = &radeon_fbdev_fb_ops;
+	info->flags = FBINFO_DEFAULT;
+	/* radeon resume is fragile and needs a vt switch to help it along */
+	info->skip_vt_switch = false;
+
+	drm_fb_helper_fill_info(info, fb_helper, sizes);
+
+	tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
+	info->fix.smem_start = rdev->mc.aper_base + tmp;
+	info->fix.smem_len = radeon_bo_size(rbo);
+	info->screen_base = (__force void __iomem *)rbo->kptr;
+	info->screen_size = radeon_bo_size(rbo);
+
+	memset_io(info->screen_base, 0, info->screen_size);
+
+	/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
+
+	DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
+	DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
+	DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
+	DRM_INFO("fb depth is %d\n", fb->format->depth);
+	DRM_INFO("   pitch is %d\n", fb->pitches[0]);
+
+	return 0;
+
+err_drm_framebuffer_unregister_private:
+	fb_helper->fb = NULL;
+	drm_framebuffer_unregister_private(fb);
+	drm_framebuffer_cleanup(fb);
+err_kfree:
+	kfree(fb);
+err_radeon_fbdev_destroy_pinned_object:
+	radeon_fbdev_destroy_pinned_object(gobj);
+	return ret;
+}
+
+static const struct drm_fb_helper_funcs radeon_fbdev_fb_helper_funcs = {
+	.fb_probe = radeon_fbdev_fb_helper_fb_probe,
+};
+
+/*
+ * Fbdev client and struct drm_client_funcs
+ */
+
+static void radeon_fbdev_client_unregister(struct drm_client_dev *client)
+{
+	struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
+	struct drm_device *dev = fb_helper->dev;
+	struct radeon_device *rdev = dev->dev_private;
+
+	if (fb_helper->info) {
+		vga_switcheroo_client_fb_set(rdev->pdev, NULL);
+		drm_fb_helper_unregister_info(fb_helper);
+	} else {
+		drm_client_release(&fb_helper->client);
+		drm_fb_helper_unprepare(fb_helper);
+		kfree(fb_helper);
+	}
+}
+
+static int radeon_fbdev_client_restore(struct drm_client_dev *client)
+{
+	drm_fb_helper_lastclose(client->dev);
+	vga_switcheroo_process_delayed_switch();
+
+	return 0;
+}
+
+static int radeon_fbdev_client_hotplug(struct drm_client_dev *client)
+{
+	struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
+	struct drm_device *dev = client->dev;
+	struct radeon_device *rdev = dev->dev_private;
+	int ret;
+
+	if (dev->fb_helper)
+		return drm_fb_helper_hotplug_event(dev->fb_helper);
+
+	ret = drm_fb_helper_init(dev, fb_helper);
+	if (ret)
+		goto err_drm_err;
+
+	if (!drm_drv_uses_atomic_modeset(dev))
+		drm_helper_disable_unused_functions(dev);
+
+	ret = drm_fb_helper_initial_config(fb_helper);
+	if (ret)
+		goto err_drm_fb_helper_fini;
+
+	vga_switcheroo_client_fb_set(rdev->pdev, fb_helper->info);
+
+	return 0;
+
+err_drm_fb_helper_fini:
+	drm_fb_helper_fini(fb_helper);
+err_drm_err:
+	drm_err(dev, "Failed to setup radeon fbdev emulation (ret=%d)\n", ret);
+	return ret;
+}
+
+static const struct drm_client_funcs radeon_fbdev_client_funcs = {
+	.owner		= THIS_MODULE,
+	.unregister	= radeon_fbdev_client_unregister,
+	.restore	= radeon_fbdev_client_restore,
+	.hotplug	= radeon_fbdev_client_hotplug,
+};
+
+void radeon_fbdev_setup(struct radeon_device *rdev)
+{
+	struct drm_fb_helper *fb_helper;
+	int bpp_sel = 32;
+	int ret;
+
+	if (rdev->mc.real_vram_size <= (8 * 1024 * 1024))
+		bpp_sel = 8;
+	else if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32 * 1024 * 1024))
+		bpp_sel = 16;
+
+	fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL);
+	if (!fb_helper)
+		return;
+	drm_fb_helper_prepare(rdev->ddev, fb_helper, bpp_sel, &radeon_fbdev_fb_helper_funcs);
+
+	ret = drm_client_init(rdev->ddev, &fb_helper->client, "radeon-fbdev",
+			      &radeon_fbdev_client_funcs);
+	if (ret) {
+		drm_err(rdev->ddev, "Failed to register client: %d\n", ret);
+		goto err_drm_client_init;
+	}
+
+	ret = radeon_fbdev_client_hotplug(&fb_helper->client);
+	if (ret)
+		drm_dbg_kms(rdev->ddev, "client hotplug ret=%d\n", ret);
+
+	drm_client_register(&fb_helper->client);
+
+	return;
+
+err_drm_client_init:
+	drm_fb_helper_unprepare(fb_helper);
+	kfree(fb_helper);
+}
+
+void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
+{
+	if (rdev->ddev->fb_helper)
+		drm_fb_helper_set_suspend(rdev->ddev->fb_helper, state);
+}
+
+bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
+{
+	struct drm_fb_helper *fb_helper = rdev->ddev->fb_helper;
+	struct drm_gem_object *gobj;
+
+	if (!fb_helper)
+		return false;
+
+	gobj = drm_gem_fb_get_obj(fb_helper->fb, 0);
+	if (!gobj)
+		return false;
+	if (gobj != &robj->tbo.base)
+		return false;
+
+	return true;
+}