#include "pipe/p_screen.h"
#include "pipe/p_util.h"

#include "nv50_context.h"
#include "nv50_screen.h"

#include "nouveau/nouveau_stateobj.h"

#define GRCLASS5097_CHIPSETS 0x00000000
#define GRCLASS8297_CHIPSETS 0x00000010

static boolean
nv50_screen_is_format_supported(struct pipe_screen *pscreen,
				enum pipe_format format, uint type)
{
	return FALSE;
}

static const char *
nv50_screen_get_name(struct pipe_screen *pscreen)
{
	struct nv50_screen *screen = nv50_screen(pscreen);
	static char buffer[128];

	snprintf(buffer, sizeof(buffer), "NV%02X", screen->chipset);
	return buffer;
}

static const char *
nv50_screen_get_vendor(struct pipe_screen *pscreen)
{
	return "nouveau";
}

static int
nv50_screen_get_param(struct pipe_screen *pscreen, int param)
{
	switch (param) {
	case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
		return 32;
	case PIPE_CAP_NPOT_TEXTURES:
		return 0;
	case PIPE_CAP_TWO_SIDED_STENCIL:
		return 1;
	case PIPE_CAP_GLSL:
		return 0;
	case PIPE_CAP_S3TC:
		return 0;
	case PIPE_CAP_ANISOTROPIC_FILTER:
		return 0;
	case PIPE_CAP_POINT_SPRITE:
		return 0;
	case PIPE_CAP_MAX_RENDER_TARGETS:
		return 8;
	case PIPE_CAP_OCCLUSION_QUERY:
		return 0;
	case PIPE_CAP_TEXTURE_SHADOW_MAP:
		return 0;
	case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
		return 13;
	case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
		return 10;
	case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
		return 13;
	default:
		NOUVEAU_ERR("Unknown PIPE_CAP %d\n", param);
		return 0;
	}
}

static float
nv50_screen_get_paramf(struct pipe_screen *pscreen, int param)
{
	switch (param) {
	case PIPE_CAP_MAX_LINE_WIDTH:
	case PIPE_CAP_MAX_LINE_WIDTH_AA:
		return 10.0;
	case PIPE_CAP_MAX_POINT_WIDTH:
	case PIPE_CAP_MAX_POINT_WIDTH_AA:
		return 64.0;
	case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
		return 16.0;
	case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
		return 4.0;
	case PIPE_CAP_BITMAP_TEXCOORD_BIAS:
		return 0.0;
	default:
		NOUVEAU_ERR("Unknown PIPE_CAP %d\n", param);
		return 0.0;
	}
}

static void
nv50_screen_destroy(struct pipe_screen *pscreen)
{
	FREE(pscreen);
}

struct pipe_screen *
nv50_screen_create(struct pipe_winsys *ws, struct nouveau_winsys *nvws,
		   unsigned chipset)
{
	struct nv50_screen *screen = CALLOC_STRUCT(nv50_screen);
	struct nouveau_stateobj *so;
	unsigned tesla_class = 0, ret;

	if (!screen)
		return NULL;
	screen->chipset = chipset;
	screen->nvws = nvws;

	/* 3D object */
	if ((chipset & 0xf0) != 0x50 && (chipset & 0xf0) != 0x80) {
		NOUVEAU_ERR("Not a G8x chipset\n");
		nv50_screen_destroy(&screen->pipe);
		return NULL;
	}

	if (GRCLASS5097_CHIPSETS & (1 << (chipset & 0x0f))) {
		tesla_class = 0x5097;
	} else
	if (GRCLASS8297_CHIPSETS & (1 << (chipset & 0x0f))) {
		tesla_class = 0x8297;
	} else {
		NOUVEAU_ERR("Unknown G8x chipset: NV%02x\n", chipset);
		nv50_screen_destroy(&screen->pipe);
		return NULL;
	}

	ret = nvws->grobj_alloc(nvws, tesla_class, &screen->tesla);
	if (ret) {
		NOUVEAU_ERR("Error creating 3D object: %d\n", ret);
		nv50_screen_destroy(&screen->pipe);
		return NULL;
	}

	/* Sync notifier */
	ret = nvws->notifier_alloc(nvws, 1, &screen->sync);
	if (ret) {
		NOUVEAU_ERR("Error creating notifier object: %d\n", ret);
		nv50_screen_destroy(&screen->pipe);
		return NULL;
	}

	/* Static tesla init */
	so = so_new(128, 0);
	so_method(so, screen->tesla, NV50TCL_DMA_NOTIFY, 1);
	so_data  (so, screen->sync->handle);
	so_emit(nvws, so);
	so_ref(NULL, &so);
	nvws->push_flush(nvws->channel, 0);

	screen->pipe.winsys = ws;

	screen->pipe.destroy = nv50_screen_destroy;

	screen->pipe.get_name = nv50_screen_get_name;
	screen->pipe.get_vendor = nv50_screen_get_vendor;
	screen->pipe.get_param = nv50_screen_get_param;
	screen->pipe.get_paramf = nv50_screen_get_paramf;

	screen->pipe.is_format_supported = nv50_screen_is_format_supported;

	nv50_screen_init_miptree_functions(&screen->pipe);

	return &screen->pipe;
}