path: root/drivers/char/drm/mga_state.c

/* mga_state.c -- State support for MGA G200/G400 -*- linux-c -*-
 * Created: Thu Jan 27 02:53:43 2000 by jhartmann@precisioninsight.com
 *
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * 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, 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
 * VA LINUX SYSTEMS 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.
 *
 * Authors:
 *    Jeff Hartmann <jhartmann@valinux.com>
 *    Keith Whitwell <keith@tungstengraphics.com>
 *
 * Rewritten by:
 *    Gareth Hughes <gareth@valinux.com>
 */

#include "drmP.h"
#include "drm.h"
#include "mga_drm.h"
#include "mga_drv.h"

/* ================================================================
 * DMA hardware state programming functions
 */

static void mga_emit_clip_rect(drm_mga_private_t * dev_priv,
			       struct drm_clip_rect * box)
{
	drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
	drm_mga_context_regs_t *ctx = &sarea_priv->context_state;
	unsigned int pitch = dev_priv->front_pitch;
	DMA_LOCALS;

	BEGIN_DMA(2);

	/* Force reset of DWGCTL on G400 (eliminates clip disable bit).
	 */
	if (dev_priv->chipset >= MGA_CARD_TYPE_G400) {
		DMA_BLOCK(MGA_DWGCTL, ctx->dwgctl,
			  MGA_LEN + MGA_EXEC, 0x80000000,
			  MGA_DWGCTL, ctx->dwgctl,
			  MGA_LEN + MGA_EXEC, 0x80000000);
	}
	DMA_BLOCK(MGA_DMAPAD, 0x00000000,
		  MGA_CXBNDRY, ((box->x2 - 1) << 16) | box->x1,
		  MGA_YTOP, box->y1 * pitch, MGA_YBOT, (box->y2 - 1) * pitch);

	ADVANCE_DMA();
}

static __inline__ void mga_g200_emit_context(drm_mga_private_t * dev_priv)
{
	drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
	drm_mga_context_regs_t *ctx = &sarea_priv->context_state;
	DMA_LOCALS;

	BEGIN_DMA(3);

	DMA_BLOCK(MGA_DSTORG, ctx->dstorg,
		  MGA_MACCESS, ctx->maccess,
		  MGA_PLNWT, ctx->plnwt, MGA_DWGCTL, ctx->dwgctl);

	DMA_BLOCK(MGA_ALPHACTRL, ctx->alphactrl,
		  MGA_FOGCOL, ctx->fogcolor,
		  MGA_WFLAG, ctx->wflag, MGA_ZORG, dev_priv->depth_offset);

	DMA_BLOCK(MGA_FCOL, ctx->fcol,
		  MGA_DMAPAD, 0x00000000,
		  MGA_DMAPAD, 0x00000000, MGA_DMAPAD, 0x00000000);

	ADVANCE_DMA();
}

static __inline__ void mga_g400_emit_context(drm_mga_private_t * dev_priv)
{
	drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
	drm_mga_context_regs_t *ctx = &sarea_priv->context_state;
	DMA_LOCALS;

	BEGIN_DMA(4);

	DMA_BLOCK(MGA_DSTORG, ctx->dstorg,
		  MGA_MACCESS, ctx->maccess,
		  MGA_PLNWT, ctx->plnwt, MGA_DWGCTL, ctx->dwgctl);

	DMA_BLOCK(MGA_ALPHACTRL, ctx->alphactrl,
		  MGA_FOGCOL, ctx->fogcolor,
		  MGA_WFLAG, ctx->wflag, MGA_ZORG, dev_priv->depth_offset);

	DMA_BLOCK(MGA_WFLAG1, ctx->wflag,
		  MGA_TDUALSTAGE0, ctx->tdualstage0,
		  MGA_TDUALSTAGE1, ctx->tdualstage1, MGA_FCOL, ctx->fcol);

	DMA_BLOCK(MGA_STENCIL, ctx->stencil,
		  MGA_STENCILCTL, ctx->stencilctl,
		  MGA_DMAPAD, 0x00000000, MGA_DMAPAD, 0x00000000);

	ADVANCE_DMA();
}

static __inline__ void mga_g200_emit_tex0(drm_mga_private_t * dev_priv)
{
	drm_mga_sarea_t *sarea_priv = dev_priv->sarea_priv;
	drm_mga_texture_regs_t *tex = &sarea_priv->tex_state[0];
	DMA_LOCALS;

	BEGIN_DMA(4);

	DMA_BLOCK(MGA_TEXCTL2, tex->texctl2,
		  MGA_TEXCTL, tex->texctl,