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/*

 * 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 

#include 

#include "drmP.h"

#include "drm.h"

#include "drm_crtc.h"

#include "drm_crtc_helper.h"

#include "radeon_drm.h"

#include "radeon.h"

#include "drm_fb_helper.h"

#include 

#include "radeon_object.h"

/* object hierarchy -

   this contains a helper + a radeon fb

   the helper contains a pointer to radeon framebuffer baseclass.

*/

struct radeon_fbdev {

    struct drm_fb_helper        helper;

	struct radeon_framebuffer rfb;

	struct list_head fbdev_list;

	struct radeon_device		*rdev;

};

static struct fb_ops radeonfb_ops = {

//   .owner = THIS_MODULE,

	.fb_check_var = drm_fb_helper_check_var,

	.fb_set_par = drm_fb_helper_set_par,

//	.fb_fillrect = cfb_fillrect,

//	.fb_copyarea = cfb_copyarea,

//	.fb_imageblit = cfb_imageblit,

//	.fb_pan_display = drm_fb_helper_pan_display,

	.fb_blank = drm_fb_helper_blank,

	.fb_setcmap = drm_fb_helper_setcmap,

};

int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bool tiled)

{

	int aligned = width;

	int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;

	int pitch_mask = 0;

	switch (bpp / 8) {

	case 1:

		pitch_mask = align_large ? 255 : 127;

		break;

	case 2:

		pitch_mask = align_large ? 127 : 31;

		break;

	case 3:

	case 4:

		pitch_mask = align_large ? 63 : 15;

		break;

	}

	aligned += pitch_mask;

	aligned &= ~pitch_mask;

	return aligned;

}

static void radeonfb_destroy_pinned_object(struct drm_gem_object *gobj)

{

	struct radeon_bo *rbo = gobj->driver_private;

	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_unreference_unlocked(gobj);

}

static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,

					 struct drm_mode_fb_cmd *mode_cmd,

					 struct drm_gem_object **gobj_p)

{

	struct radeon_device *rdev = rfbdev->rdev;

	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;

	/* 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);

	size = mode_cmd->pitch * mode_cmd->height;

	aligned_size = ALIGN(size, PAGE_SIZE);

//   ret = radeon_gem_object_create(rdev, aligned_size, 0,

//           RADEON_GEM_DOMAIN_VRAM,

//                      false, true,

//           &gobj);

	if (ret) {

		printk(KERN_ERR "failed to allocate framebuffer (%d)\n",

		       aligned_size);

		return -ENOMEM;

	}

	rbo = gobj->driver_private;

	if (fb_tiled)

		tiling_flags = RADEON_TILING_MACRO;

#ifdef __BIG_ENDIAN

	switch (mode_cmd->bpp) {

	case 32:

		tiling_flags |= RADEON_TILING_SWAP_32BIT;

		break;

	case 16:

		tiling_flags |= RADEON_TILING_SWAP_16BIT;

	default:

		break;

	}

#endif

	if (tiling_flags) {

		ret = radeon_bo_set_tiling_flags(rbo,

					tiling_flags | RADEON_TILING_SURFACE,

						 mode_cmd->pitch);

		if (ret)

			dev_err(rdev->dev, "FB failed to set tiling flags\n");

	}

	ret = radeon_bo_reserve(rbo, false);

	if (unlikely(ret != 0))

		goto out_unref;

	ret = radeon_bo_pin(rbo, RADEON_GEM_DOMAIN_VRAM, NULL);

	if (ret) {

		radeon_bo_unreserve(rbo);

		goto out_unref;

	}

	if (fb_tiled)

		radeon_bo_check_tiling(rbo, 0, 0);

	ret = radeon_bo_kmap(rbo, NULL);

	radeon_bo_unreserve(rbo);

	if (ret) {

		goto out_unref;

	}

	*gobj_p = gobj;

	return 0;

out_unref:

	radeonfb_destroy_pinned_object(gobj);

	*gobj_p = NULL;

	return ret;

}

static int radeonfb_create(struct radeon_fbdev *rfbdev,

			   struct drm_fb_helper_surface_size *sizes)

{

	struct radeon_device *rdev = rfbdev->rdev;

	struct fb_info *info;

	struct drm_framebuffer *fb = NULL;

	struct drm_mode_fb_cmd mode_cmd;

	struct drm_gem_object *gobj = NULL;

	struct radeon_bo *rbo = NULL;

	struct device *device = &rdev->pdev->dev;

	int ret;

	unsigned long tmp;

    ENTER();

	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.bpp = sizes->surface_bpp;

	mode_cmd.depth = sizes->surface_depth;

//   ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);

//   rbo = gobj->driver_private;

	/* okay we have an object now allocate the framebuffer */

	info = framebuffer_alloc(0, device);

	if (info == NULL) {

		ret = -ENOMEM;

		goto out_unref;

	}

	info->par = rfbdev;

#if 0

	radeon_framebuffer_init(rdev->ddev, &rfbdev->rfb, &mode_cmd, gobj);

	fb = &rfbdev->rfb.base;

	/* setup helper */

	rfbdev->helper.fb = fb;

	rfbdev->helper.fbdev = info;

//   memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));

	strcpy(info->fix.id, "radeondrmfb");

	drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);

	info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;

	info->fbops = &radeonfb_ops;

	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 = rbo->kptr;

	info->screen_size = radeon_bo_size(rbo);

	drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);

	/* setup aperture base/size for vesafb takeover */

	info->apertures = alloc_apertures(1);

	if (!info->apertures) {

		ret = -ENOMEM;

		goto out_unref;

	}

	info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;

	info->apertures->ranges[0].size = rdev->mc.aper_size;

//   info->pixmap.size = 64*1024;

//   info->pixmap.buf_align = 8;

//   info->pixmap.access_align = 32;

//   info->pixmap.flags = FB_PIXMAP_SYSTEM;

//   info->pixmap.scan_align = 1;

	if (info->screen_base == NULL) {

		ret = -ENOSPC;

		goto out_unref;

	}

	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->depth);

	DRM_INFO("   pitch is %d\n", fb->pitch);

#endif

    LEAVE();

    return 0;

out_unref:

	if (rbo) {

	}

	if (fb && ret) {

		kfree(fb);

	}

	return ret;

}

static int radeon_fb_find_or_create_single(struct drm_fb_helper *helper,

					   struct drm_fb_helper_surface_size *sizes)

{

	struct radeon_fbdev *rfbdev = (struct radeon_fbdev *)helper;

	int new_fb = 0;

	int ret;

	if (!helper->fb) {

		ret = radeonfb_create(rfbdev, sizes);

		if (ret)

			return ret;

		new_fb = 1;

	}

	return new_fb;

}

static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)

{

	struct fb_info *info;

	struct radeon_framebuffer *rfb = &rfbdev->rfb;

	if (rfbdev->helper.fbdev) {

		info = rfbdev->helper.fbdev;

//       unregister_framebuffer(info);

//       framebuffer_release(info);

	}

	if (rfb->obj) {

		radeonfb_destroy_pinned_object(rfb->obj);

		rfb->obj = NULL;

	}

//   drm_fb_helper_fini(&rfbdev->helper);

	drm_framebuffer_cleanup(&rfb->base);

	return 0;

}

static struct drm_fb_helper_funcs radeon_fb_helper_funcs = {

	.gamma_set = radeon_crtc_fb_gamma_set,

	.gamma_get = radeon_crtc_fb_gamma_get,

	.fb_probe = radeon_fb_find_or_create_single,

};

int radeon_fbdev_init(struct radeon_device *rdev)

{

	struct radeon_fbdev *rfbdev;

	int bpp_sel = 32;

	int ret;

    ENTER();

	/* select 8 bpp console on RN50 or 16MB cards */

	if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32*1024*1024))

		bpp_sel = 8;

	rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);

	if (!rfbdev)

		return -ENOMEM;

	rfbdev->rdev = rdev;

	rdev->mode_info.rfbdev = rfbdev;

	rfbdev->helper.funcs = &radeon_fb_helper_funcs;

	ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper,

				 rdev->num_crtc,

				 RADEONFB_CONN_LIMIT);

	if (ret) {

		kfree(rfbdev);

		return ret;

	}

	drm_fb_helper_single_add_all_connectors(&rfbdev->helper);

	drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);

    LEAVE();

	return 0;

}

void radeon_fbdev_fini(struct radeon_device *rdev)

{

	if (!rdev->mode_info.rfbdev)

		return;

	radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);

	kfree(rdev->mode_info.rfbdev);

	rdev->mode_info.rfbdev = NULL;

}

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;

}