/**************************************************************************

 *

 * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA

 * All Rights Reserved.

 *

 * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL

 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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.

 *

 **************************************************************************/

#include <errno.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "internal.h"

#include <sys/ioctl.h>

#include "xf86drm.h"

#include "libdrm_macros.h"

#include "i915_drm.h"

struct intel_bo

{

	struct kms_bo base;

	unsigned map_count;

};

static int

intel_get_prop(struct kms_driver *kms, unsigned key, unsigned *out)

{

	switch (key) {

	case KMS_BO_TYPE:

		*out = KMS_BO_TYPE_SCANOUT_X8R8G8B8 | KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8;

		break;

	default:

		return -EINVAL;

	}

	return 0;

}

static int

intel_destroy(struct kms_driver *kms)

{

	free(kms);

	return 0;

}

static int

intel_bo_create(struct kms_driver *kms,

		 const unsigned width, const unsigned height,

		 const enum kms_bo_type type, const unsigned *attr,

		 struct kms_bo **out)

{

	struct drm_i915_gem_create arg;

	unsigned size, pitch;

	struct intel_bo *bo;

	int i, ret;

	for (i = 0; attr[i]; i += 2) {

		switch (attr[i]) {

		case KMS_WIDTH:

		case KMS_HEIGHT:

		case KMS_BO_TYPE:

			break;

		default:

			return -EINVAL;

		}

	}

	bo = calloc(1, sizeof(*bo));

	if (!bo)

		return -ENOMEM;

	if (type == KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8) {

		pitch = 64 * 4;

		size = 64 * 64 * 4;

	} else if (type == KMS_BO_TYPE_SCANOUT_X8R8G8B8) {

		pitch = width * 4;

		pitch = (pitch + 512 - 1) & ~(512 - 1);

		size = pitch * ((height + 4 - 1) & ~(4 - 1));

	} else {

		free(bo);

		return -EINVAL;

	}

	memset(&arg, 0, sizeof(arg));

	arg.size = size;

	ret = drmCommandWriteRead(kms->fd, DRM_I915_GEM_CREATE, &arg, sizeof(arg));

	if (ret)

		goto err_free;

	bo->base.kms = kms;

	bo->base.handle = arg.handle;

	bo->base.size = size;

	bo->base.pitch = pitch;

	*out = &bo->base;

	if (type == KMS_BO_TYPE_SCANOUT_X8R8G8B8 && pitch > 512) {

		struct drm_i915_gem_set_tiling tile;

		memset(&tile, 0, sizeof(tile));

		tile.handle = bo->base.handle;

		tile.tiling_mode = I915_TILING_X;

		tile.stride = bo->base.pitch;

		ret = drmCommandWriteRead(kms->fd, DRM_I915_GEM_SET_TILING, &tile, sizeof(tile));

#if 0

		if (ret) {

			kms_bo_destroy(out);

			return ret;

		}

#endif

	}

	return 0;

err_free:

	free(bo);

	return ret;

}

static int

intel_bo_get_prop(struct kms_bo *bo, unsigned key, unsigned *out)

{

	switch (key) {

	default:

		return -EINVAL;

	}

}

static int

intel_bo_map(struct kms_bo *_bo, void **out)

{

	struct intel_bo *bo = (struct intel_bo *)_bo;

	struct drm_i915_gem_mmap_gtt arg;

	void *map = NULL;

	int ret;

	if (bo->base.ptr) {

		bo->map_count++;

		*out = bo->base.ptr;

		return 0;

	}

	memset(&arg, 0, sizeof(arg));

	arg.handle = bo->base.handle;

	ret = drmCommandWriteRead(bo->base.kms->fd, DRM_I915_GEM_MMAP_GTT, &arg, sizeof(arg));

	if (ret)

		return ret;

	map = drm_mmap(0, bo->base.size, PROT_READ | PROT_WRITE, MAP_SHARED, bo->base.kms->fd, arg.offset);

	if (map == MAP_FAILED)

		return -errno;

	bo->base.ptr = map;

	bo->map_count++;

	*out = bo->base.ptr;

	return 0;

}

static int

intel_bo_unmap(struct kms_bo *_bo)

{

	struct intel_bo *bo = (struct intel_bo *)_bo;

	bo->map_count--;

	return 0;

}

static int

intel_bo_destroy(struct kms_bo *_bo)

{

	struct intel_bo *bo = (struct intel_bo *)_bo;

	struct drm_gem_close arg;

	int ret;

	if (bo->base.ptr) {

		/* XXX Sanity check map_count */

		drm_munmap(bo->base.ptr, bo->base.size);

		bo->base.ptr = NULL;

	}

	memset(&arg, 0, sizeof(arg));

	arg.handle = bo->base.handle;

	ret = drmIoctl(bo->base.kms->fd, DRM_IOCTL_GEM_CLOSE, &arg;;

	if (ret)

		return -errno;

	free(bo);

	return 0;

}

drm_private int

intel_create(int fd, struct kms_driver **out)

{

	struct kms_driver *kms;

	kms = calloc(1, sizeof(*kms));

	if (!kms)

		return -ENOMEM;

	kms->fd = fd;

	kms->bo_create = intel_bo_create;

	kms->bo_map = intel_bo_map;

	kms->bo_unmap = intel_bo_unmap;

	kms->bo_get_prop = intel_bo_get_prop;

	kms->bo_destroy = intel_bo_destroy;

	kms->get_prop = intel_get_prop;

	kms->destroy = intel_destroy;

	*out = kms;

	return 0;

}