/*
 * Copyright © 2009 Intel Corporation
 *
 * 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.
 *
 * Author:
 *    Zou Nan hai <nanhai.zou@intel.com>
 */
#include "intel_xvmc_private.h"
#include "i830_reg.h"
#include "i965_reg.h"
#include "brw_defines.h"
#include "brw_structs.h"

#ifndef ALIGN
#define ALIGN(m,n) (((m) + (n) - 1) & ~((n) - 1))
#endif

#define BATCH_STRUCT(x) intelBatchbufferData(&x, sizeof(x), 0)
#define VLD_MAX_SLICE_SIZE (32 * 1024)
#define CS_SIZE 	30
#define URB_SIZE 	384
/* idct table */
#define C0 23170
#define C1 22725
#define C2 21407
#define C3 19266
#define C4 16383
#define C5 12873
#define C6 8867
#define C7 4520
const uint32_t idct_table[] = {
	C4, C1, C2, C3, C4, C5, C6, C7,	//g5
	C4, C1, C2, C3, C4, C5, C6, C7,
	C4, C3, C6, -C7, -C4, -C1, -C2, -C5,
	C4, C3, C6, -C7, -C4, -C1, -C2, -C5,
	C4, C5, -C6, -C1, -C4, C7, C2, C3,
	C4, C5, -C6, -C1, -C4, C7, C2, C3,
	C4, C7, -C2, -C5, C4, C3, -C6, -C1,
	C4, C7, -C2, -C5, C4, C3, -C6, -C1,
	C4, -C7, -C2, C5, C4, -C3, -C6, C1,
	C4, -C7, -C2, C5, C4, -C3, -C6, C1,
	C4, -C5, -C6, C1, -C4, -C7, C2, -C3,
	C4, -C5, -C6, C1, -C4, -C7, C2, -C3,
	C4, -C3, C6, C7, -C4, C1, -C2, C5,
	C4, -C3, C6, C7, -C4, C1, -C2, C5,
	C4, -C1, C2, -C3, C4, -C5, C6, -C7,
	C4, -C1, C2, -C3, C4, -C5, C6, -C7	//g20
};

#undef C0
#undef C1
#undef C2
#undef C3
#undef C4
#undef C5
#undef C6
#undef C7

#define INTERFACE_NUM	8
enum interface {
	FRAME_INTRA = 0,
	FRAME_FRAME_PRED_FORWARD,
	FRAME_FRAME_PRED_BACKWARD,
	FRAME_FRAME_PRED_BIDIRECT,
	FRAME_FIELD_PRED_FORWARD,
	FRAME_FIELD_PRED_BACKWARD,
	FRAME_FIELD_PRED_BIDIRECT,
	LIB_INTERFACE
};

/*kernels for vld mode*/
static uint32_t lib_kernel[][4] = {
#include "shader/vld/lib.g4b"
};

static uint32_t ipicture_kernel[][4] = {
#include "shader/vld/ipicture.g4b"
};

static uint32_t frame_forward_kernel[][4] = {
#include "shader/vld/frame_forward.g4b"
};

static uint32_t frame_backward_kernel[][4] = {
#include "shader/vld/frame_backward.g4b"
};

static uint32_t frame_f_b_kernel[][4] = {
#include "shader/vld/frame_f_b.g4b"
};

static uint32_t field_forward_kernel[][4] = {
#include "shader/vld/field_forward.g4b"
};

static uint32_t field_backward_kernel[][4] = {
#include "shader/vld/field_backward.g4b"
};

static uint32_t field_f_b_kernel[][4] = {
#include "shader/vld/field_f_b.g4b"
};

/* on Ironlake */
static uint32_t lib_kernel_gen5[][4] = {
#include "shader/vld/lib.g4b.gen5"
};

static uint32_t ipicture_kernel_gen5[][4] = {
#include "shader/vld/ipicture.g4b.gen5"
};

static uint32_t frame_forward_kernel_gen5[][4] = {
#include "shader/vld/frame_forward.g4b.gen5"
};

static uint32_t frame_backward_kernel_gen5[][4] = {
#include "shader/vld/frame_backward.g4b.gen5"
};

static uint32_t frame_f_b_kernel_gen5[][4] = {
#include "shader/vld/frame_f_b.g4b.gen5"
};

static uint32_t field_forward_kernel_gen5[][4] = {
#include "shader/vld/field_forward.g4b.gen5"
};

static uint32_t field_backward_kernel_gen5[][4] = {
#include "shader/vld/field_backward.g4b.gen5"
};

static uint32_t field_f_b_kernel_gen5[][4] = {
#include "shader/vld/field_f_b.g4b.gen5"
};

/*kernels for mc mode*/
static uint32_t lib_kernel_idct[][4] = {
#include "shader/mc/lib_igd.g4b"
};

static uint32_t ipicture_kernel_idct[][4] = {
#include "shader/mc/ipicture_igd.g4b"
};

static uint32_t frame_forward_kernel_idct[][4] = {
#include "shader/mc/frame_forward_igd.g4b"
};

static uint32_t frame_backward_kernel_idct[][4] = {
#include "shader/mc/frame_backward_igd.g4b"
};

static uint32_t frame_f_b_kernel_idct[][4] = {
#include "shader/mc/frame_f_b_igd.g4b"
};

static uint32_t field_forward_kernel_idct[][4] = {
#include "shader/mc/field_forward_igd.g4b"
};

static uint32_t field_backward_kernel_idct[][4] = {
#include "shader/mc/field_backward_igd.g4b"
};

static uint32_t field_f_b_kernel_idct[][4] = {
#include "shader/mc/field_f_b_igd.g4b"
};

/* on Ironlake */
static uint32_t lib_kernel_idct_gen5[][4] = {
#include "shader/mc/lib_igd.g4b.gen5"
};

static uint32_t ipicture_kernel_idct_gen5[][4] = {
#include "shader/mc/ipicture_igd.g4b.gen5"
};

static uint32_t frame_forward_kernel_idct_gen5[][4] = {
#include "shader/mc/frame_forward_igd.g4b.gen5"
};

static uint32_t frame_backward_kernel_idct_gen5[][4] = {
#include "shader/mc/frame_backward_igd.g4b.gen5"
};

static uint32_t frame_f_b_kernel_idct_gen5[][4] = {
#include "shader/mc/frame_f_b_igd.g4b.gen5"
};

static uint32_t field_forward_kernel_idct_gen5[][4] = {
#include "shader/mc/field_forward_igd.g4b.gen5"
};

static uint32_t field_backward_kernel_idct_gen5[][4] = {
#include "shader/mc/field_backward_igd.g4b.gen5"
};

static uint32_t field_f_b_kernel_idct_gen5[][4] = {
#include "shader/mc/field_f_b_igd.g4b.gen5"
};

struct media_kernel {
	uint32_t(*bin)[4];
	int size;
};
static struct media_kernel media_kernels[] = {
	/*kernels for vld mode */
	{ipicture_kernel, sizeof(ipicture_kernel)}
	,
	{frame_forward_kernel, sizeof(frame_forward_kernel)}
	,
	{frame_backward_kernel, sizeof(frame_backward_kernel)}
	,
	{frame_f_b_kernel, sizeof(frame_f_b_kernel)}
	,
	{field_forward_kernel, sizeof(field_forward_kernel)}
	,
	{field_backward_kernel, sizeof(field_backward_kernel)}
	,
	{field_f_b_kernel, sizeof(field_f_b_kernel)}
	,
	{lib_kernel, sizeof(lib_kernel)}
	,
	/*kernels for mc mode */
	{ipicture_kernel_idct, sizeof(ipicture_kernel_idct)}
	,
	{frame_forward_kernel_idct, sizeof(frame_forward_kernel_idct)}
	,
	{frame_backward_kernel_idct, sizeof(frame_backward_kernel_idct)}
	,
	{frame_f_b_kernel_idct, sizeof(frame_f_b_kernel_idct)}
	,
	{field_forward_kernel_idct, sizeof(field_forward_kernel_idct)}
	,
	{field_backward_kernel_idct, sizeof(field_backward_kernel_idct)}
	,
	{field_f_b_kernel_idct, sizeof(field_f_b_kernel_idct)}
	,
	{lib_kernel_idct, sizeof(lib_kernel_idct)}
};

static struct media_kernel media_gen5_kernels[] = {
	/*kernels for vld mode */
	{ipicture_kernel_gen5, sizeof(ipicture_kernel_gen5)}
	,
	{frame_forward_kernel_gen5, sizeof(frame_forward_kernel_gen5)}
	,
	{frame_backward_kernel_gen5, sizeof(frame_backward_kernel_gen5)}
	,
	{frame_f_b_kernel_gen5, sizeof(frame_f_b_kernel_gen5)}
	,
	{field_forward_kernel_gen5, sizeof(field_forward_kernel_gen5)}
	,
	{field_backward_kernel_gen5, sizeof(field_backward_kernel_gen5)}
	,
	{field_f_b_kernel_gen5, sizeof(field_f_b_kernel_gen5)}
	,
	{lib_kernel_gen5, sizeof(lib_kernel_gen5)}
	,
	/*kernels for mc mode */
	{ipicture_kernel_idct_gen5, sizeof(ipicture_kernel_idct_gen5)}
	,
	{frame_forward_kernel_idct_gen5, sizeof(frame_forward_kernel_idct_gen5)}
	,
	{frame_backward_kernel_idct_gen5,
	 sizeof(frame_backward_kernel_idct_gen5)}
	,
	{frame_f_b_kernel_idct_gen5, sizeof(frame_f_b_kernel_idct_gen5)}
	,
	{field_forward_kernel_idct_gen5, sizeof(field_forward_kernel_idct_gen5)}
	,
	{field_backward_kernel_idct_gen5,
	 sizeof(field_backward_kernel_idct_gen5)}
	,
	{field_f_b_kernel_idct_gen5, sizeof(field_f_b_kernel_idct_gen5)}
	,
	{lib_kernel_idct_gen5, sizeof(lib_kernel_idct_gen5)}
};

#define MEDIA_KERNEL_NUM (sizeof(media_kernels)/sizeof(media_kernels[0]))

struct media_kernel_obj {
	dri_bo *bo;
};

struct interface_descriptor_obj {
	dri_bo *bo;
	struct media_kernel_obj kernels[MEDIA_KERNEL_NUM];
};

struct vfe_state_obj {
	dri_bo *bo;
	struct interface_descriptor_obj interface;
};

struct vld_state_obj {
	dri_bo *bo;
};

struct surface_obj {
	dri_bo *bo;
};

struct surface_state_obj {
	struct surface_obj surface;
	dri_bo *bo;
};

#define MAX_SURFACES 12
struct binding_table_obj {
	dri_bo *bo;
	struct surface_state_obj surface_states[MAX_SURFACES];
};

struct slice_data_obj {
	dri_bo *bo;
};

struct mb_data_obj {
	dri_bo *bo;
};

struct cs_state_obj {
	dri_bo *bo;
};

static struct media_state {
	struct vfe_state_obj vfe_state;
	struct vld_state_obj vld_state;
	struct binding_table_obj binding_table;
	struct cs_state_obj cs_object;
	struct slice_data_obj slice_data;
	struct mb_data_obj mb_data;
} media_state;

/* XvMCQMatrix * 2 + idct_table + 8 * kernel offset pointer */
#define CS_OBJECT_SIZE (32*20 + sizeof(unsigned int) * 8)
static void free_object(struct media_state *s)
{
	int i;
#define FREE_ONE_BO(bo) \
    if (bo) \
        drm_intel_bo_unreference(bo)
	FREE_ONE_BO(s->vfe_state.bo);
	FREE_ONE_BO(s->vfe_state.interface.bo);
	for (i = 0; i < MEDIA_KERNEL_NUM; i++)
		FREE_ONE_BO(s->vfe_state.interface.kernels[i].bo);
	FREE_ONE_BO(s->binding_table.bo);
	for (i = 0; i < MAX_SURFACES; i++)
		FREE_ONE_BO(s->binding_table.surface_states[i].bo);
	FREE_ONE_BO(s->slice_data.bo);
	FREE_ONE_BO(s->mb_data.bo);
	FREE_ONE_BO(s->cs_object.bo);
	FREE_ONE_BO(s->vld_state.bo);
}

static int alloc_object(struct media_state *s)
{
	int i;

	for (i = 0; i < MAX_SURFACES; i++) {
		s->binding_table.surface_states[i].bo =
		    drm_intel_bo_alloc(xvmc_driver->bufmgr, "surface_state",
				       sizeof(struct brw_surface_state),
				       0x1000);
		if (!s->binding_table.surface_states[i].bo)
			goto out;
	}
	return 0;
out:
	free_object(s);
	return BadAlloc;
}

static void flush()
{
#define FLUSH_STATE_CACHE  	1
	struct brw_mi_flush f;
	memset(&f, 0, sizeof(f));
	f.opcode = CMD_MI_FLUSH;
	f.flags = (1 << FLUSH_STATE_CACHE);
	BATCH_STRUCT(f);
}

static Status vfe_state(int vfe_mode)
{
	struct brw_vfe_state tmp, *vfe_state = &tmp;
	memset(vfe_state, 0, sizeof(*vfe_state));
	if (vfe_mode == VFE_VLD_MODE) {
		vfe_state->vfe0.extend_vfe_state_present = 1;
	} else {
		vfe_state->vfe0.extend_vfe_state_present = 0;
	}
	vfe_state->vfe1.vfe_mode = vfe_mode;
	vfe_state->vfe1.num_urb_entries = 1;
	vfe_state->vfe1.children_present = 0;
	vfe_state->vfe1.urb_entry_alloc_size = 2;
	vfe_state->vfe1.max_threads = 31;
	vfe_state->vfe2.interface_descriptor_base =
	    media_state.vfe_state.interface.bo->offset >> 4;

	if (media_state.vfe_state.bo)
		drm_intel_bo_unreference(media_state.vfe_state.bo);

	media_state.vfe_state.bo = drm_intel_bo_alloc(xvmc_driver->bufmgr,
						      "vfe state",
						      sizeof(struct
							     brw_vfe_state),
						      0x1000);
	if (!media_state.vfe_state.bo)
		return BadAlloc;

	drm_intel_bo_subdata(media_state.vfe_state.bo, 0, sizeof(tmp), &tmp);

	drm_intel_bo_emit_reloc(media_state.vfe_state.bo,
				offsetof(struct brw_vfe_state, vfe2),
				media_state.vfe_state.interface.bo, 0,
				I915_GEM_DOMAIN_INSTRUCTION, 0);
	return Success;
}

static Status interface_descriptor()
{
	int i;
	struct brw_interface_descriptor tmp, *desc = &tmp;

	if (media_state.vfe_state.interface.bo)
		drm_intel_bo_unreference(media_state.vfe_state.interface.bo);

	media_state.vfe_state.interface.bo =
	    drm_intel_bo_alloc(xvmc_driver->bufmgr, "interfaces",
			       MEDIA_KERNEL_NUM *
			       sizeof(struct brw_interface_descriptor), 0x1000);
	if (!media_state.vfe_state.interface.bo)
		return BadAlloc;

	for (i = 0; i < MEDIA_KERNEL_NUM; i++) {
		memset(desc, 0, sizeof(*desc));
		desc->desc0.grf_reg_blocks = 15;
		desc->desc0.kernel_start_pointer =
		    media_state.vfe_state.interface.kernels[i].bo->offset >> 6;

		desc->desc1.const_urb_entry_read_offset = 0;
		desc->desc1.const_urb_entry_read_len = 30;

		desc->desc3.binding_table_entry_count = MAX_SURFACES - 1;
		desc->desc3.binding_table_pointer =
		    media_state.binding_table.bo->offset >> 5;

		drm_intel_bo_subdata(media_state.vfe_state.interface.bo,
				     i * sizeof(tmp), sizeof(tmp), desc);

		drm_intel_bo_emit_reloc(media_state.vfe_state.interface.bo,
					i * sizeof(*desc) + offsetof(struct
								     brw_interface_descriptor,
								     desc0),
					media_state.vfe_state.
					interface.kernels[i].bo,
					desc->desc0.grf_reg_blocks,
					I915_GEM_DOMAIN_INSTRUCTION, 0);

		drm_intel_bo_emit_reloc(media_state.vfe_state.interface.bo,
					i * sizeof(*desc) + offsetof(struct
								     brw_interface_descriptor,
								     desc3),
					media_state.binding_table.bo,
					desc->desc3.binding_table_entry_count,
					I915_GEM_DOMAIN_INSTRUCTION, 0);
	}
	return Success;
}

static int setup_media_kernels(struct intel_xvmc_hw_context *ctx)
{
	int i;

	assert(MEDIA_KERNEL_NUM ==
	       sizeof(media_gen5_kernels) / sizeof(media_gen5_kernels[0]));

	for (i = 0; i < MEDIA_KERNEL_NUM; i++) {
		if (ctx->i965.is_igdng)
			media_state.vfe_state.interface.kernels[i].bo =
			    drm_intel_bo_alloc(xvmc_driver->bufmgr, "kernel",
					       media_gen5_kernels[i].size,
					       0x1000);
		else
			media_state.vfe_state.interface.kernels[i].bo =
			    drm_intel_bo_alloc(xvmc_driver->bufmgr, "kernels",
					       media_kernels[i].size, 0x1000);

		if (!media_state.vfe_state.interface.kernels[i].bo)
			goto out;
	}

	for (i = 0; i < MEDIA_KERNEL_NUM; i++) {
		dri_bo *bo = media_state.vfe_state.interface.kernels[i].bo;

		if (ctx->i965.is_igdng)
			drm_intel_bo_subdata(bo, 0, media_gen5_kernels[i].size,
					     media_gen5_kernels[i].bin);
		else
			drm_intel_bo_subdata(bo, 0, media_kernels[i].size,
					     media_kernels[i].bin);
	}
	return 0;
out:
	free_object(&media_state);
	return BadAlloc;
}

static Status binding_tables()
{
	unsigned int table[MAX_SURFACES];
	int i;

	if (media_state.binding_table.bo)
		drm_intel_bo_unreference(media_state.binding_table.bo);
	media_state.binding_table.bo =
	    drm_intel_bo_alloc(xvmc_driver->bufmgr, "binding_table",
			       MAX_SURFACES * 4, 0x1000);
	if (!media_state.binding_table.bo)
		return BadAlloc;

	for (i = 0; i < MAX_SURFACES; i++) {
		table[i] =
		    media_state.binding_table.surface_states[i].bo->offset;
		drm_intel_bo_emit_reloc(media_state.binding_table.bo,
					i * sizeof(unsigned int),
					media_state.
					binding_table.surface_states[i].bo, 0,
					I915_GEM_DOMAIN_INSTRUCTION, 0);
	}

	drm_intel_bo_subdata(media_state.binding_table.bo, 0, sizeof(table),
			     table);
	return Success;
}

static Status cs_init(int interface_offset)
{
	char buf[CS_OBJECT_SIZE];
	unsigned int *lib_reloc;
	int i;

	if (media_state.cs_object.bo)
		drm_intel_bo_unreference(media_state.cs_object.bo);

	media_state.cs_object.bo =
	    drm_intel_bo_alloc(xvmc_driver->bufmgr, "cs object", CS_OBJECT_SIZE,
			       64);
	if (!media_state.cs_object.bo)
		return BadAlloc;

	memcpy(buf + 32 * 4, idct_table, sizeof(idct_table));
	/* idct lib reloction */
	lib_reloc = (unsigned int *)(buf + 32 * 20);
	for (i = 0; i < 8; i++)
		lib_reloc[i] =
		    media_state.vfe_state.interface.kernels[LIB_INTERFACE +
							    interface_offset].bo->
		    offset;
	drm_intel_bo_subdata(media_state.cs_object.bo, 32 * 4,
			     32 * 16 + 8 * sizeof(unsigned int), buf + 32 * 4);

	for (i = 0; i < 8; i++)
		drm_intel_bo_emit_reloc(media_state.cs_object.bo,
					32 * 20 + sizeof(unsigned int) * i,
					media_state.vfe_state.
					interface.kernels[LIB_INTERFACE +
							  interface_offset].bo,
					0, I915_GEM_DOMAIN_INSTRUCTION, 0);

	return Success;
}

#define STRIDE(w)               (w)
#define SIZE_YUV420(w, h)       (h * (STRIDE(w) + STRIDE(w >> 1)))
static Status create_context(Display * display, XvMCContext * context,
			     int priv_count, CARD32 * priv_data)
{
	struct intel_xvmc_context *intel_ctx;
	struct intel_xvmc_hw_context *hw_ctx;
	hw_ctx = (struct intel_xvmc_hw_context *)priv_data;

	intel_ctx = calloc(1, sizeof(struct intel_xvmc_context));
	if (!intel_ctx)
		return BadAlloc;
	intel_ctx->hw = hw_ctx;
	context->privData = intel_ctx;
	intel_ctx->surface_bo_size
		= SIZE_YUV420(context->width, context->height);

	if (alloc_object(&media_state))
		return BadAlloc;

	if (setup_media_kernels(hw_ctx))
		return BadAlloc;
	return Success;
}

static Status destroy_context(Display * display, XvMCContext * context)
{
	struct intel_xvmc_context *intel_ctx;
	intel_ctx = context->privData;
	free(intel_ctx->hw);
	free(intel_ctx);
	return Success;
}

static Status load_qmatrix(Display * display, XvMCContext * context,
			   const XvMCQMatrix * qmx)
{
	Status ret;
	ret = cs_init(0);
	if (ret != Success)
		return ret;
	drm_intel_bo_subdata(media_state.cs_object.bo, 0, 64,
			     qmx->intra_quantiser_matrix);
	drm_intel_bo_subdata(media_state.cs_object.bo, 64, 64,
			     qmx->non_intra_quantiser_matrix);

	return Success;
}

static Status vld_state(const XvMCMpegControl * control)
{
	struct brw_vld_state tmp, *vld = &tmp;

	if (media_state.vld_state.bo)
		drm_intel_bo_unreference(media_state.vld_state.bo);
	media_state.vld_state.bo = drm_intel_bo_alloc(xvmc_driver->bufmgr,
						      "vld state",
						      sizeof(struct
							     brw_vld_state),
						      64);
	if (!media_state.vld_state.bo)
		return BadAlloc;

	memset(vld, 0, sizeof(*vld));
	vld->vld0.f_code_0_0 = control->FHMV_range + 1;
	vld->vld0.f_code_0_1 = control->FVMV_range + 1;
	vld->vld0.f_code_1_0 = control->BHMV_range + 1;
	vld->vld0.f_code_1_1 = control->BVMV_range + 1;
	vld->vld0.intra_dc_precision = control->intra_dc_precision;
	vld->vld0.picture_structure = control->picture_structure;
	vld->vld0.top_field_first = !!(control->flags & XVMC_TOP_FIELD_FIRST);
	vld->vld0.frame_predict_frame_dct =
	    !!(control->flags & XVMC_PRED_DCT_FRAME);
	vld->vld0.concealment_motion_vector =
	    !!(control->flags & XVMC_CONCEALMENT_MOTION_VECTORS);
	vld->vld0.quantizer_scale_type = !!(control->flags & XVMC_Q_SCALE_TYPE);
	vld->vld0.intra_vlc_format = !!(control->flags & XVMC_INTRA_VLC_FORMAT);
	vld->vld0.scan_order = !!(control->flags & XVMC_ALTERNATE_SCAN);

	vld->vld1.picture_coding_type = control->picture_coding_type;

	vld->desc_remap_table0.index_0 = FRAME_INTRA;
	vld->desc_remap_table0.index_1 = FRAME_FRAME_PRED_FORWARD;
	vld->desc_remap_table0.index_2 = FRAME_FIELD_PRED_FORWARD;
	vld->desc_remap_table0.index_3 = FRAME_FIELD_PRED_BIDIRECT;	/* dual prime */
	vld->desc_remap_table0.index_4 = FRAME_FRAME_PRED_BACKWARD;
	vld->desc_remap_table0.index_5 = FRAME_FIELD_PRED_BACKWARD;
	vld->desc_remap_table0.index_6 = FRAME_FRAME_PRED_BIDIRECT;
	vld->desc_remap_table0.index_7 = FRAME_FIELD_PRED_BIDIRECT;

	vld->desc_remap_table1.index_8 = FRAME_INTRA;
	vld->desc_remap_table1.index_9 = FRAME_FRAME_PRED_FORWARD;
	vld->desc_remap_table1.index_10 = FRAME_FIELD_PRED_FORWARD;
	vld->desc_remap_table1.index_11 = FRAME_FIELD_PRED_BIDIRECT;
	vld->desc_remap_table1.index_12 = FRAME_FRAME_PRED_BACKWARD;
	vld->desc_remap_table1.index_13 = FRAME_FIELD_PRED_BACKWARD;
	vld->desc_remap_table1.index_14 = FRAME_FRAME_PRED_BIDIRECT;
	vld->desc_remap_table1.index_15 = FRAME_FIELD_PRED_BIDIRECT;

	drm_intel_bo_subdata(media_state.vld_state.bo, 0, sizeof(tmp), vld);
	return Success;
}

static Status setup_media_surface(int index, dri_bo * bo,
				  unsigned long offset, int w, int h,
				  Bool write)
{
	struct brw_surface_state tmp, *ss = &tmp;
	memset(ss, 0, sizeof(*ss));
	ss->ss0.surface_type = BRW_SURFACE_2D;
	ss->ss0.surface_format = BRW_SURFACEFORMAT_R8_SINT;
	ss->ss1.base_addr = offset + bo->offset;
	ss->ss2.width = w - 1;
	ss->ss2.height = h - 1;
	ss->ss3.pitch = w - 1;

	if (media_state.binding_table.surface_states[index].bo)
		drm_intel_bo_unreference(media_state.
					 binding_table.surface_states[index].
					 bo);

	media_state.binding_table.surface_states[index].bo =
	    drm_intel_bo_alloc(xvmc_driver->bufmgr, "surface_state",
			       sizeof(struct brw_surface_state), 0x1000);
	if (!media_state.binding_table.surface_states[index].bo)
		return BadAlloc;

	drm_intel_bo_subdata(media_state.binding_table.surface_states[index].bo,
			     0, sizeof(*ss), ss);
	drm_intel_bo_emit_reloc(media_state.binding_table.
				surface_states[index].bo,
				offsetof(struct brw_surface_state, ss1), bo,
				offset, I915_GEM_DOMAIN_RENDER,
				write ? I915_GEM_DOMAIN_RENDER : 0);
	return Success;
}

static Status setup_surface(struct intel_xvmc_surface *target,
			    struct intel_xvmc_surface *past,
			    struct intel_xvmc_surface *future, int w, int h)
{
	Status ret;
	ret = setup_media_surface(0, target->bo, 0, w, h, TRUE);
	if (ret != Success)
		return ret;
	ret = setup_media_surface(1, target->bo, w * h, w / 2, h / 2, TRUE);
	if (ret != Success)
		return ret;
	ret =
	    setup_media_surface(2, target->bo, w * h + w * h / 4, w / 2, h / 2,
				TRUE);
	if (ret != Success)
		return ret;
	if (past) {
		ret = setup_media_surface(4, past->bo, 0, w, h, FALSE);
		if (ret != Success)
			return ret;
		ret =
		    setup_media_surface(5, past->bo, w * h, w / 2, h / 2,
					FALSE);
		if (ret != Success)
			return ret;
		ret =
		    setup_media_surface(6, past->bo, w * h + w * h / 4, w / 2,
					h / 2, FALSE);
		if (ret != Success)
			return ret;
	}
	if (future) {
		ret = setup_media_surface(7, future->bo, 0, w, h, FALSE);
		if (ret != Success)
			return ret;
		ret =
		    setup_media_surface(8, future->bo, w * h, w / 2, h / 2,
					FALSE);
		if (ret != Success)
			return ret;
		ret =
		    setup_media_surface(9, future->bo, w * h + w * h / 4, w / 2,
					h / 2, FALSE);
		if (ret != Success)
			return ret;
	}
	return Success;
}

static Status begin_surface(Display * display, XvMCContext * context,
			    XvMCSurface * target,
			    XvMCSurface * past,
			    XvMCSurface * future,
			    const XvMCMpegControl * control)
{
	struct intel_xvmc_surface *priv_target, *priv_past, *priv_future;
	intel_xvmc_context_ptr intel_ctx = context->privData;
	Status ret;

	priv_target = target->privData;
	priv_past = past ? past->privData : NULL;
	priv_future = future ? future->privData : NULL;

	ret = vld_state(control);
	if (ret != Success)
		return ret;
	ret = setup_surface(priv_target, priv_past, priv_future,
			    context->width, context->height);
	if (ret != Success)
		return ret;
	ret = binding_tables();
	if (ret != Success)
		return ret;
	ret = interface_descriptor();
	if (ret != Success)
		return ret;
	ret = vfe_state(VFE_VLD_MODE);
	if (ret != Success)
		return ret;

	LOCK_HARDWARE(intel_ctx->hw_context);
	flush();
	UNLOCK_HARDWARE(intel_ctx->hw_context);
	return Success;
}

static Status put_slice(Display * display, XvMCContext * context,
			unsigned char *slice, int nbytes)
{
	return Success;
}

static void state_base_address(struct intel_xvmc_hw_context *ctx)
{
	BATCH_LOCALS;

	if (ctx->i965.is_igdng) {
		BEGIN_BATCH(8);
		OUT_BATCH(BRW_STATE_BASE_ADDRESS | 6);
		OUT_BATCH(0 | BASE_ADDRESS_MODIFY);
		OUT_BATCH(0 | BASE_ADDRESS_MODIFY);
		OUT_BATCH(0 | BASE_ADDRESS_MODIFY);
		OUT_BATCH(0 | BASE_ADDRESS_MODIFY);
		OUT_BATCH(0 | BASE_ADDRESS_MODIFY);
		OUT_BATCH(0 | BASE_ADDRESS_MODIFY);
		OUT_BATCH(0 | BASE_ADDRESS_MODIFY);
		ADVANCE_BATCH();
	} else {
		BEGIN_BATCH(6);
		OUT_BATCH(BRW_STATE_BASE_ADDRESS | 4);
		OUT_BATCH(0 | BASE_ADDRESS_MODIFY);
		OUT_BATCH(0 | BASE_ADDRESS_MODIFY);
		OUT_BATCH(0 | BASE_ADDRESS_MODIFY);
		OUT_BATCH(0 | BASE_ADDRESS_MODIFY);
		OUT_BATCH(0 | BASE_ADDRESS_MODIFY);
		ADVANCE_BATCH();
	}
}

static void pipeline_select()
{
	BATCH_LOCALS;
	BEGIN_BATCH(1);
	OUT_BATCH(NEW_PIPELINE_SELECT | PIPELINE_SELECT_MEDIA);
	ADVANCE_BATCH();
}

static void media_state_pointers(int vfe_mode)
{
	BATCH_LOCALS;
	BEGIN_BATCH(3);
	OUT_BATCH(BRW_MEDIA_STATE_POINTERS | 1);
	if (vfe_mode == VFE_VLD_MODE)
		OUT_RELOC(media_state.vld_state.bo, I915_GEM_DOMAIN_INSTRUCTION,
			  0, 1);
	else
		OUT_BATCH(0);
	OUT_RELOC(media_state.vfe_state.bo, I915_GEM_DOMAIN_INSTRUCTION, 0, 0);
	ADVANCE_BATCH();
}

static void align_urb_fence()
{
	BATCH_LOCALS;
	int i, offset_to_next_cacheline;
	unsigned long batch_offset;
	BEGIN_BATCH(3);
	batch_offset = (void *)batch_ptr - xvmc_driver->alloc.ptr;
	offset_to_next_cacheline = ALIGN(batch_offset, 64) - batch_offset;
	if (offset_to_next_cacheline <= 12 && offset_to_next_cacheline != 0) {
		for (i = 0; i < offset_to_next_cacheline / 4; i++)
			OUT_BATCH(0);
		ADVANCE_BATCH();
	}
}

static void urb_layout()
{
	BATCH_LOCALS;
	align_urb_fence();
	BEGIN_BATCH(3);
	OUT_BATCH(BRW_URB_FENCE |
		  UF0_VFE_REALLOC |
		  UF0_CS_REALLOC |
		  UF0_SF_REALLOC |
		  UF0_CLIP_REALLOC | UF0_GS_REALLOC | UF0_VS_REALLOC | 1);

	OUT_BATCH((0 << UF1_CLIP_FENCE_SHIFT) |
		  (0 << UF1_GS_FENCE_SHIFT) | (0 << UF1_VS_FENCE_SHIFT));

	OUT_BATCH((0 << UF2_CS_FENCE_SHIFT) | (0 << UF2_SF_FENCE_SHIFT) | ((URB_SIZE - CS_SIZE - 1) << UF2_VFE_FENCE_SHIFT) |	/* VFE_SIZE */
		  ((URB_SIZE) << UF2_CS_FENCE_SHIFT));	/* CS_SIZE */
	ADVANCE_BATCH();
}

static void cs_urb_layout()
{
	BATCH_LOCALS;
	BEGIN_BATCH(2);
	OUT_BATCH(BRW_CS_URB_STATE | 0);
	OUT_BATCH((CS_SIZE << 4) |	/* URB Entry Allocation Size */
		  (1 << 0));	/* Number of URB Entries */
	ADVANCE_BATCH();
}

static void cs_buffer()
{
	BATCH_LOCALS;
	BEGIN_BATCH(2);
	OUT_BATCH(BRW_CONSTANT_BUFFER | 0 | (1 << 8));
	OUT_RELOC(media_state.cs_object.bo, I915_GEM_DOMAIN_INSTRUCTION, 0,
		  CS_SIZE);
	ADVANCE_BATCH();
}

/* kick media object to gpu in idct mode*/
static void send_media_object(XvMCMacroBlock * mb, dri_bo * bo,
			      uint32_t offset, enum interface interface)
{
	BATCH_LOCALS;
	BEGIN_BATCH(13);
	OUT_BATCH(BRW_MEDIA_OBJECT | 11);
	OUT_BATCH(interface);
	OUT_BATCH(6 * 128);
	OUT_RELOC(bo, I915_GEM_DOMAIN_INSTRUCTION, 0, offset);

	OUT_BATCH(mb->x << 4);
	OUT_BATCH(mb->y << 4);
	OUT_RELOC(bo, I915_GEM_DOMAIN_INSTRUCTION, 0, offset);
	OUT_BATCH_SHORT(mb->coded_block_pattern);
	OUT_BATCH_SHORT(mb->PMV[0][0][0]);
	OUT_BATCH_SHORT(mb->PMV[0][0][1]);
	OUT_BATCH_SHORT(mb->PMV[0][1][0]);
	OUT_BATCH_SHORT(mb->PMV[0][1][1]);

	OUT_BATCH_SHORT(mb->PMV[1][0][0]);
	OUT_BATCH_SHORT(mb->PMV[1][0][1]);
	OUT_BATCH_SHORT(mb->PMV[1][1][0]);
	OUT_BATCH_SHORT(mb->PMV[1][1][1]);
	OUT_BATCH_CHAR(mb->dct_type);
	OUT_BATCH_CHAR(mb->motion_vertical_field_select);

	OUT_BATCH(0xffffffff);
	ADVANCE_BATCH();
}

/* kick media object to gpu in vld mode*/
static void vld_send_media_object(dri_bo * bo,
				  int slice_len, int mb_h_pos, int mb_v_pos,
				  int mb_bit_offset, int mb_count,
				  int q_scale_code)
{
	BATCH_LOCALS;
	BEGIN_BATCH(6);
	OUT_BATCH(BRW_MEDIA_OBJECT | 4);
	OUT_BATCH(0);
	OUT_BATCH(slice_len);
	OUT_RELOC(bo, I915_GEM_DOMAIN_INSTRUCTION, 0, 0);
	OUT_BATCH((mb_h_pos << 24) | (mb_v_pos << 16) | (mb_count << 8) |
		  (mb_bit_offset));
	OUT_BATCH(q_scale_code << 24);
	ADVANCE_BATCH();
}

static Status put_slice2(Display * display, XvMCContext * context,
			 unsigned char *slice, int nbytes, int sliceCode)
{
	unsigned int bit_buf;
	intel_xvmc_context_ptr intel_ctx = context->privData;
	struct intel_xvmc_hw_context *hw_ctx = intel_ctx->hw;
	int q_scale_code, mb_row;

	mb_row = *(slice - 1) - 1;
	bit_buf =
	    (slice[0] << 24) | (slice[1] << 16) | (slice[2] << 8) | (slice[3]);

	q_scale_code = bit_buf >> 27;

	if (media_state.slice_data.bo) {
		drm_intel_gem_bo_unmap_gtt(media_state.slice_data.bo);

		drm_intel_bo_unreference(media_state.slice_data.bo);
	}
	media_state.slice_data.bo = drm_intel_bo_alloc(xvmc_driver->bufmgr,
						       "slice data",
						       VLD_MAX_SLICE_SIZE, 64);
	if (!media_state.slice_data.bo)
		return BadAlloc;
	drm_intel_gem_bo_map_gtt(media_state.slice_data.bo);

	memcpy(media_state.slice_data.bo->virtual, slice, nbytes);

	LOCK_HARDWARE(intel_ctx->hw_context);
	state_base_address(hw_ctx);
	pipeline_select();
	media_state_pointers(VFE_VLD_MODE);
	urb_layout();
	cs_urb_layout();
	cs_buffer();
	vld_send_media_object(media_state.slice_data.bo,
			      nbytes, 0, mb_row, 6, 127, q_scale_code);
	intelFlushBatch();
	UNLOCK_HARDWARE(intel_ctx->hw_context);

	return Success;
}

static Status render_surface(Display * display,
			     XvMCContext * context,
			     unsigned int picture_structure,
			     XvMCSurface * target_surface,
			     XvMCSurface * past_surface,
			     XvMCSurface * future_surface,
			     unsigned int flags,
			     unsigned int num_macroblocks,
			     unsigned int first_macroblock,
			     XvMCMacroBlockArray * macroblock_array,
			     XvMCBlockArray * blocks)
{
	struct intel_xvmc_surface *priv_target, *priv_past, *priv_future;
	intel_xvmc_context_ptr intel_ctx;
	XvMCMacroBlock *mb;
	Status ret;
	unsigned short *block_ptr;
	int i, j;
	int block_offset = 0;
	struct intel_xvmc_hw_context *hw_ctx;

	intel_ctx = context->privData;

	hw_ctx = (struct intel_xvmc_hw_context *)context->privData;
	priv_target = target_surface->privData;
	priv_past = past_surface ? past_surface->privData : NULL;
	priv_future = future_surface ? future_surface->privData : NULL;

	ret = setup_surface(priv_target, priv_past, priv_future,
			    context->width, context->height);
	if (ret != Success)
		return ret;
	ret = binding_tables();
	if (ret != Success)
		return ret;
	ret = interface_descriptor();
	if (ret != Success)
		return ret;
	ret = cs_init(INTERFACE_NUM);
	if (ret != Success)
		return ret;
	ret = vfe_state(VFE_GENERIC_MODE);
	if (ret != Success)
		return ret;

	if (media_state.mb_data.bo) {
		drm_intel_gem_bo_unmap_gtt(media_state.mb_data.bo);

		drm_intel_bo_unreference(media_state.mb_data.bo);
	}
	unsigned int block_num =
	    (((context->width + 15) >> 4) * ((context->height + 15) >> 4));
	unsigned int surface_size = (64 * sizeof(short) * 6 * block_num);
	media_state.mb_data.bo = drm_intel_bo_alloc(xvmc_driver->bufmgr,
						    "macroblock data",
						    surface_size, 64);
	if (!media_state.mb_data.bo)
		return BadAlloc;
	drm_intel_gem_bo_map_gtt(media_state.mb_data.bo);

	block_ptr = media_state.mb_data.bo->virtual;
	unsigned short *mb_block_ptr;
	for (i = first_macroblock; i < num_macroblocks + first_macroblock; i++) {
		mb = &macroblock_array->macro_blocks[i];
		mb_block_ptr = &blocks->blocks[(mb->index << 6)];

		if (mb->coded_block_pattern & 0x20) {
			for (j = 0; j < 8; j++)
				memcpy(block_ptr + 16 * j, mb_block_ptr + 8 * j,
				       16);
			mb_block_ptr += 64;
		}
		if (mb->coded_block_pattern & 0x10) {
			for (j = 0; j < 8; j++)
				memcpy(block_ptr + 16 * j + 8,
				       mb_block_ptr + 8 * j, 16);
			mb_block_ptr += 64;
		}

		block_ptr += 2 * 64;
		if (mb->coded_block_pattern & 0x08) {
			for (j = 0; j < 8; j++)
				memcpy(block_ptr + 16 * j, mb_block_ptr + 8 * j,
				       16);
			mb_block_ptr += 64;
		}
		if (mb->coded_block_pattern & 0x04) {
			for (j = 0; j < 8; j++)
				memcpy(block_ptr + 16 * j + 8,
				       mb_block_ptr + 8 * j, 16);
			mb_block_ptr += 64;
		}

		block_ptr += 2 * 64;
		if (mb->coded_block_pattern & 0x2) {
			memcpy(block_ptr, mb_block_ptr, 128);
			mb_block_ptr += 64;
		}

		block_ptr += 64;
		if (mb->coded_block_pattern & 0x1)
			memcpy(block_ptr, mb_block_ptr, 128);
		block_ptr += 64;
	}

	LOCK_HARDWARE(intel_ctx->hw_context);
	state_base_address(hw_ctx);
	flush();
	pipeline_select();
	urb_layout();
	media_state_pointers(VFE_GENERIC_MODE);
	cs_urb_layout();
	cs_buffer();
	for (i = first_macroblock;
	     i < num_macroblocks + first_macroblock;
	     i++, block_offset += 128 * 6) {
		mb = &macroblock_array->macro_blocks[i];

		if (mb->macroblock_type & XVMC_MB_TYPE_INTRA) {
			send_media_object(mb, media_state.mb_data.bo,
					  block_offset,
					  FRAME_INTRA + INTERFACE_NUM);
		} else {
			if (((mb->motion_type & 3) == XVMC_PREDICTION_FRAME)) {
				if ((mb->macroblock_type &
				     XVMC_MB_TYPE_MOTION_FORWARD)) {
					if ((mb->macroblock_type &
					     XVMC_MB_TYPE_MOTION_BACKWARD)) {
						send_media_object(mb,
								  media_state.mb_data.
								  bo,
								  block_offset,
								  FRAME_FRAME_PRED_BIDIRECT
								  +
								  INTERFACE_NUM);
					} else {
						send_media_object(mb,
								  media_state.mb_data.
								  bo,
								  block_offset,
								  FRAME_FRAME_PRED_FORWARD
								  +
								  INTERFACE_NUM);
					}
				} else
				    if ((mb->macroblock_type &
					 XVMC_MB_TYPE_MOTION_BACKWARD)) {
					send_media_object(mb,
							  media_state.
							  mb_data.bo,
							  block_offset,
							  FRAME_FRAME_PRED_BACKWARD
							  + INTERFACE_NUM);
				}
			} else if ((mb->motion_type & 3) ==
				   XVMC_PREDICTION_FIELD) {
				if ((mb->macroblock_type &
				     XVMC_MB_TYPE_MOTION_FORWARD)) {
					if (((mb->macroblock_type &
					      XVMC_MB_TYPE_MOTION_BACKWARD))) {
						send_media_object(mb,
								  media_state.mb_data.
								  bo,
								  block_offset,
								  FRAME_FIELD_PRED_BIDIRECT
								  +
								  INTERFACE_NUM);
					} else {
						send_media_object(mb,
								  media_state.mb_data.
								  bo,
								  block_offset,
								  FRAME_FIELD_PRED_FORWARD
								  +
								  INTERFACE_NUM);
					}
				} else
				    if ((mb->macroblock_type &
					 XVMC_MB_TYPE_MOTION_BACKWARD)) {
					send_media_object(mb,
							  media_state.
							  mb_data.bo,
							  block_offset,
							  FRAME_FIELD_PRED_BACKWARD
							  + INTERFACE_NUM);
				}
			} else {
				send_media_object(mb, media_state.mb_data.bo, block_offset, FRAME_FIELD_PRED_BIDIRECT + INTERFACE_NUM);	/*dual prime */
			}
		}
	}
	intelFlushBatch();
	UNLOCK_HARDWARE(intel_ctx->hw_context);
	return Success;
}

struct _intel_xvmc_driver xvmc_vld_driver = {
	.type = XVMC_I965_MPEG2_VLD,
	.create_context = create_context,
	.destroy_context = destroy_context,
	.load_qmatrix = load_qmatrix,
	.begin_surface = begin_surface,
	.render_surface = render_surface,
	.put_slice = put_slice,
	.put_slice2 = put_slice2
};