/**************************************************************************
 *
 * Copyright 2018 Advanced Micro Devices, Inc.
 * 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 HOLDER(S) OR AUTHOR(S) 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 <assert.h>
#include <stdio.h>

#include "pipe/p_video_codec.h"

#include "util/u_memory.h"
#include "util/u_video.h"

#include "radeonsi/si_pipe.h"
#include "radeon_video.h"
#include "radeon_vcn_dec.h"

static struct pb_buffer *radeon_jpeg_get_decode_param(struct radeon_decoder *dec,
					struct pipe_video_buffer *target,
					struct pipe_picture_desc *picture)
{
	struct si_texture *luma = (struct si_texture *)
				((struct vl_video_buffer *)target)->resources[0];
	struct si_texture *chroma = (struct si_texture *)
				((struct vl_video_buffer *)target)->resources[1];

	dec->jpg.bsd_size = align(dec->bs_size, 128);
	dec->jpg.dt_luma_top_offset = luma->surface.u.gfx9.surf_offset;
	if (target->buffer_format == PIPE_FORMAT_NV12) {
		dec->jpg.dt_chroma_top_offset = chroma->surface.u.gfx9.surf_offset;
		dec->jpg.dt_pitch = luma->surface.u.gfx9.surf_pitch * luma->surface.blk_w;
	}
	else if (target->buffer_format == PIPE_FORMAT_YUYV)
		dec->jpg.dt_pitch = luma->surface.u.gfx9.surf_pitch;
	dec->jpg.dt_uv_pitch = dec->jpg.dt_pitch / 2;

	return luma->buffer.buf;
}

/* add a new set register command to the IB */
static void set_reg_jpeg(struct radeon_decoder *dec, unsigned reg,
			 unsigned cond, unsigned type, uint32_t val)
{
	radeon_emit(dec->cs, RDECODE_PKTJ(SOC15_REG_ADDR(reg), cond, type));
	radeon_emit(dec->cs, val);
}

/* send a bitstream buffer command */
static void send_cmd_bitstream(struct radeon_decoder *dec,
		     struct pb_buffer* buf, uint32_t off,
		     enum radeon_bo_usage usage, enum radeon_bo_domain domain)
{
	uint64_t addr;

	// jpeg soft reset
	set_reg_jpeg(dec, mmUVD_JPEG_CNTL, COND0, TYPE0, 1);

	// ensuring the Reset is asserted in SCLK domain
	set_reg_jpeg(dec, mmUVD_CTX_INDEX, COND0, TYPE0, 0x01C2);
	set_reg_jpeg(dec, mmUVD_CTX_DATA, COND0, TYPE0, 0x01400200);
	set_reg_jpeg(dec, mmUVD_CTX_INDEX, COND0, TYPE0, 0x01C3);
	set_reg_jpeg(dec, mmUVD_CTX_DATA, COND0, TYPE0, (1 << 9));
	set_reg_jpeg(dec, mmUVD_SOFT_RESET, COND0, TYPE3, (1 << 9));

	// wait mem
	set_reg_jpeg(dec, mmUVD_JPEG_CNTL, COND0, TYPE0, 0);

	// ensuring the Reset is de-asserted in SCLK domain
	set_reg_jpeg(dec, mmUVD_CTX_INDEX, COND0, TYPE0, 0x01C3);
	set_reg_jpeg(dec, mmUVD_CTX_DATA, COND0, TYPE0, (0 << 9));
	set_reg_jpeg(dec, mmUVD_SOFT_RESET, COND0, TYPE3, (1 << 9));

	dec->ws->cs_add_buffer(dec->cs, buf, usage | RADEON_USAGE_SYNCHRONIZED,
						   domain, 0);
	addr = dec->ws->buffer_get_virtual_address(buf);
	addr = addr + off;

	// set UVD_LMI_JPEG_READ_64BIT_BAR_LOW/HIGH based on bitstream buffer address
	set_reg_jpeg(dec, mmUVD_LMI_JPEG_READ_64BIT_BAR_HIGH, COND0, TYPE0, (addr >> 32));
	set_reg_jpeg(dec, mmUVD_LMI_JPEG_READ_64BIT_BAR_LOW, COND0, TYPE0, addr);

	// set jpeg_rb_base
	set_reg_jpeg(dec, mmUVD_JPEG_RB_BASE, COND0, TYPE0, 0);

	// set jpeg_rb_base
	set_reg_jpeg(dec, mmUVD_JPEG_RB_SIZE, COND0, TYPE0, 0xFFFFFFF0);

	// set jpeg_rb_wptr
	set_reg_jpeg(dec, mmUVD_JPEG_RB_WPTR, COND0, TYPE0, (dec->jpg.bsd_size >> 2));
}

/* send a target buffer command */
static void send_cmd_target(struct radeon_decoder *dec,
		     struct pb_buffer* buf, uint32_t off,
		     enum radeon_bo_usage usage, enum radeon_bo_domain domain)
{
	uint64_t addr;

	set_reg_jpeg(dec, mmUVD_JPEG_PITCH, COND0, TYPE0, (dec->jpg.dt_pitch >> 4));
	set_reg_jpeg(dec, mmUVD_JPEG_UV_PITCH, COND0, TYPE0, ((dec->jpg.dt_uv_pitch * 2) >> 4));

	set_reg_jpeg(dec, mmUVD_JPEG_TILING_CTRL, COND0, TYPE0, 0);
	set_reg_jpeg(dec, mmUVD_JPEG_UV_TILING_CTRL, COND0, TYPE0, 0);

	dec->ws->cs_add_buffer(dec->cs, buf, usage | RADEON_USAGE_SYNCHRONIZED,
						   domain, 0);
	addr = dec->ws->buffer_get_virtual_address(buf);
	addr = addr + off;

	// set UVD_LMI_JPEG_WRITE_64BIT_BAR_LOW/HIGH based on target buffer address
	set_reg_jpeg(dec, mmUVD_LMI_JPEG_WRITE_64BIT_BAR_HIGH, COND0, TYPE0, (addr >> 32));
	set_reg_jpeg(dec, mmUVD_LMI_JPEG_WRITE_64BIT_BAR_LOW, COND0, TYPE0, addr);

	// set output buffer data address
	set_reg_jpeg(dec, mmUVD_JPEG_INDEX, COND0, TYPE0, 0);
	set_reg_jpeg(dec, mmUVD_JPEG_DATA, COND0, TYPE0, dec->jpg.dt_luma_top_offset);
	set_reg_jpeg(dec, mmUVD_JPEG_INDEX, COND0, TYPE0, 1);
	set_reg_jpeg(dec, mmUVD_JPEG_DATA, COND0, TYPE0, dec->jpg.dt_chroma_top_offset);
	set_reg_jpeg(dec, mmUVD_JPEG_TIER_CNTL2, COND0, TYPE3, 0);

	// set output buffer read pointer
	set_reg_jpeg(dec, mmUVD_JPEG_OUTBUF_RPTR, COND0, TYPE0, 0);

	// enable error interrupts
	set_reg_jpeg(dec, mmUVD_JPEG_INT_EN, COND0, TYPE0, 0xFFFFFFFE);

	// start engine command
	set_reg_jpeg(dec, mmUVD_JPEG_CNTL, COND0, TYPE0, 0x6);

	// wait for job completion, wait for job JBSI fetch done
	set_reg_jpeg(dec, mmUVD_CTX_INDEX, COND0, TYPE0, 0x01C3);
	set_reg_jpeg(dec, mmUVD_CTX_DATA, COND0, TYPE0, (dec->jpg.bsd_size >> 2));
	set_reg_jpeg(dec, mmUVD_CTX_INDEX, COND0, TYPE0, 0x01C2);
	set_reg_jpeg(dec, mmUVD_CTX_DATA, COND0, TYPE0, 0x01400200);
	set_reg_jpeg(dec, mmUVD_JPEG_RB_RPTR, COND0, TYPE3, 0xFFFFFFFF);

	// wait for job jpeg outbuf idle
	set_reg_jpeg(dec, mmUVD_CTX_INDEX, COND0, TYPE0, 0x01C3);
	set_reg_jpeg(dec, mmUVD_CTX_DATA, COND0, TYPE0, 0xFFFFFFFF);
	set_reg_jpeg(dec, mmUVD_JPEG_OUTBUF_WPTR, COND0, TYPE3, 0x00000001);

	// stop engine
	set_reg_jpeg(dec, mmUVD_JPEG_CNTL, COND0, TYPE0, 0x4);

	// asserting jpeg lmi drop
	set_reg_jpeg(dec, mmUVD_CTX_INDEX, COND0, TYPE0, 0x0005);
	set_reg_jpeg(dec, mmUVD_CTX_DATA, COND0, TYPE0, (1 << 23 | 1 << 0));
	set_reg_jpeg(dec, mmUVD_CTX_DATA, COND0, TYPE1, 0);

	// asserting jpeg reset
	set_reg_jpeg(dec, mmUVD_JPEG_CNTL, COND0, TYPE0, 1);

	// ensure reset is asserted in sclk domain
	set_reg_jpeg(dec, mmUVD_CTX_INDEX, COND0, TYPE0, 0x01C3);
	set_reg_jpeg(dec, mmUVD_CTX_DATA, COND0, TYPE0, (1 << 9));
	set_reg_jpeg(dec, mmUVD_SOFT_RESET, COND0, TYPE3, (1 << 9));

	// de-assert jpeg reset
	set_reg_jpeg(dec, mmUVD_JPEG_CNTL, COND0, TYPE0, 0);

	// ensure reset is de-asserted in sclk domain
	set_reg_jpeg(dec, mmUVD_CTX_INDEX, COND0, TYPE0, 0x01C3);
	set_reg_jpeg(dec, mmUVD_CTX_DATA, COND0, TYPE0, (0 << 9));
	set_reg_jpeg(dec, mmUVD_SOFT_RESET, COND0, TYPE3, (1 << 9));

	// de-asserting jpeg lmi drop
	set_reg_jpeg(dec, mmUVD_CTX_INDEX, COND0, TYPE0, 0x0005);
	set_reg_jpeg(dec, mmUVD_CTX_DATA, COND0, TYPE0, 0);
}

/**
 * send cmd for vcn jpeg
 */
void send_cmd_jpeg(struct radeon_decoder *dec,
			   struct pipe_video_buffer *target,
			   struct pipe_picture_desc *picture)
{
	struct pb_buffer *dt;
	struct rvid_buffer *bs_buf;

	bs_buf = &dec->bs_buffers[dec->cur_buffer];

	memset(dec->bs_ptr, 0, align(dec->bs_size, 128) - dec->bs_size);
	dec->ws->buffer_unmap(bs_buf->res->buf);

	dt = radeon_jpeg_get_decode_param(dec, target, picture);

	send_cmd_bitstream(dec, bs_buf->res->buf,
		 0, RADEON_USAGE_READ, RADEON_DOMAIN_GTT);
	send_cmd_target(dec, dt, 0,
		 RADEON_USAGE_WRITE, RADEON_DOMAIN_VRAM);
}