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/*

 * Copyright 2010 Jerome Glisse 

 *

 * 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

 * on 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 AUTHOR(S) AND/OR THEIR 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.

 *

 * Authors:

 *      Jerome Glisse

 *      Corbin Simpson 

 */

#include "pipe/p_screen.h"

#include "util/u_format.h"

#include "util/u_math.h"

#include "util/u_inlines.h"

#include "util/u_memory.h"

#include "util/u_upload_mgr.h"

#include "r600.h"

#include "radeonsi_pipe.h"

static void r600_buffer_destroy(struct pipe_screen *screen,

				struct pipe_resource *buf)

{

	struct si_resource *rbuffer = si_resource(buf);

	pb_reference(&rbuffer->buf, NULL);

	FREE(rbuffer);

}

static void *r600_buffer_transfer_map(struct pipe_context *ctx,

                                      struct pipe_resource *resource,

                                      unsigned level,

                                      unsigned usage,

                                      const struct pipe_box *box,

                                      struct pipe_transfer **ptransfer)

{

	struct r600_context *rctx = (struct r600_context*)ctx;

	struct pipe_transfer *transfer;

        struct si_resource *rbuffer = si_resource(resource);

        uint8_t *data;

	data = rctx->ws->buffer_map(rbuffer->cs_buf, rctx->cs, usage);

        if (!data) {

		return NULL;

        }

	transfer = util_slab_alloc(&rctx->pool_transfers);

	transfer->resource = resource;

	transfer->level = level;

	transfer->usage = usage;

	transfer->box = *box;

	transfer->stride = 0;

	transfer->layer_stride = 0;

        *ptransfer = transfer;

	return (uint8_t*)data + transfer->box.x;

}

static void r600_buffer_transfer_unmap(struct pipe_context *ctx,

					struct pipe_transfer *transfer)

{

	struct r600_context *rctx = (struct r600_context*)ctx;

	util_slab_free(&rctx->pool_transfers, transfer);

}

static void r600_buffer_transfer_flush_region(struct pipe_context *pipe,

						struct pipe_transfer *transfer,

						const struct pipe_box *box)

{

}

static const struct u_resource_vtbl r600_buffer_vtbl =

{

	u_default_resource_get_handle,		/* get_handle */

	r600_buffer_destroy,			/* resource_destroy */

	r600_buffer_transfer_map,		/* transfer_map */

	r600_buffer_transfer_flush_region,	/* transfer_flush_region */

	r600_buffer_transfer_unmap,		/* transfer_unmap */

	NULL	/* transfer_inline_write */

};

bool si_init_resource(struct r600_screen *rscreen,

			struct si_resource *res,

			unsigned size, unsigned alignment,

			boolean use_reusable_pool, unsigned usage)

{

	uint32_t initial_domain, domains;

	/* Staging resources particpate in transfers and blits only

	 * and are used for uploads and downloads from regular

	 * resources.  We generate them internally for some transfers.

	 */

	if (usage == PIPE_USAGE_STAGING) {

		domains = RADEON_DOMAIN_GTT;

		initial_domain = RADEON_DOMAIN_GTT;

	} else {

		domains = RADEON_DOMAIN_GTT | RADEON_DOMAIN_VRAM;

		switch(usage) {

		case PIPE_USAGE_DYNAMIC:

		case PIPE_USAGE_STREAM:

		case PIPE_USAGE_STAGING:

			initial_domain = RADEON_DOMAIN_GTT;

			break;

		case PIPE_USAGE_DEFAULT:

		case PIPE_USAGE_STATIC:

		case PIPE_USAGE_IMMUTABLE:

		default:

			initial_domain = RADEON_DOMAIN_VRAM;

			break;

		}

	}

	res->buf = rscreen->ws->buffer_create(rscreen->ws, size, alignment,

                                              use_reusable_pool,

                                              initial_domain);

	if (!res->buf) {

		return false;

	}

	res->cs_buf = rscreen->ws->buffer_get_cs_handle(res->buf);

	res->domains = domains;

	return true;

}

struct pipe_resource *si_buffer_create(struct pipe_screen *screen,

				       const struct pipe_resource *templ)

{

	struct r600_screen *rscreen = (struct r600_screen*)screen;

	struct si_resource *rbuffer;

	/* XXX We probably want a different alignment for buffers and textures. */

	unsigned alignment = 4096;

	rbuffer = MALLOC_STRUCT(si_resource);

	rbuffer->b.b = *templ;

	pipe_reference_init(&rbuffer->b.b.reference, 1);

	rbuffer->b.b.screen = screen;

	rbuffer->b.vtbl = &r600_buffer_vtbl;

	if (!si_init_resource(rscreen, rbuffer, templ->width0, alignment, TRUE, templ->usage)) {

		FREE(rbuffer);

		return NULL;

	}

	return &rbuffer->b.b;

}

void r600_upload_index_buffer(struct r600_context *rctx,

			      struct pipe_index_buffer *ib, unsigned count)

{

	u_upload_data(rctx->uploader, 0, count * ib->index_size,

		      ib->user_buffer, &ib->offset, &ib->buffer);

}

void r600_upload_const_buffer(struct r600_context *rctx, struct si_resource **rbuffer,

			const uint8_t *ptr, unsigned size,

			uint32_t *const_offset)

{

	if (R600_BIG_ENDIAN) {

		uint32_t *tmpPtr;

		unsigned i;

		if (!(tmpPtr = malloc(size))) {

			R600_ERR("Failed to allocate BE swap buffer.\n");

			return;

		}

		for (i = 0; i < size / 4; ++i) {

			tmpPtr[i] = util_bswap32(((uint32_t *)ptr)[i]);

		}

		u_upload_data(rctx->uploader, 0, size, tmpPtr, const_offset,

				(struct pipe_resource**)rbuffer);

		free(tmpPtr);

	} else {

		u_upload_data(rctx->uploader, 0, size, ptr, const_offset,

					(struct pipe_resource**)rbuffer);

	}

}