index : renesas/drm.git	android live master
	libdrm, cloned from git://anongit.freedesktop.org/mesa/drm	Laurent Pinchart

summaryrefslogtreecommitdiff

log msg author committer range

path: root/bsd-core

Mode	Name	Size
-rw-r--r--	.cvsignore	13	logplain
-rw-r--r--	Makefile	1216	logplain
-rw-r--r--	ati_pcigart.c	3075	logplain
d---------	drm	74	logplain
-rw-r--r--	drmP.h	32497	logplain
-rw-r--r--	drm_agpsupport.c	10032	logplain
-rw-r--r--	drm_atomic.h	3860	logplain
-rw-r--r--	drm_auth.c	4242	logplain
-rw-r--r--	drm_bufs.c	28682	logplain
-rw-r--r--	drm_context.c	8407	logplain
-rw-r--r--	drm_dma.c	3483	logplain
-rw-r--r--	drm_drawable.c	1779	logplain
-rw-r--r--	drm_drv.c	24604	logplain
-rw-r--r--	drm_fops.c	3566	logplain
-rw-r--r--	drm_ioctl.c	6949	logplain
-rw-r--r--	drm_irq.c	7024	logplain
-rw-r--r--	drm_linux_list.h	2343	logplain
-rw-r--r--	drm_lock.c	4945	logplain
-rw-r--r--	drm_memory.c	4079	logplain
-rw-r--r--	drm_pci.c	3907	logplain
-rw-r--r--	drm_scatter.c	3315	logplain
-rw-r--r--	drm_sysctl.c	7512	logplain
-rw-r--r--	drm_vm.c	3594	logplain
d---------	i915	74	logplain
-rw-r--r--	i915_drv.c	3354	logplain
d---------	mach64	74	logplain
-rw-r--r--	mach64_drv.c	3565	logplain
d---------	mga	74	logplain
-rw-r--r--	mga_drv.c	4957	logplain
d---------	r128	74	logplain
-rw-r--r--	r128_drv.c	3687	logplain
d---------	radeon	74	logplain
-rw-r--r--	radeon_drv.c	3895	logplain
d---------	savage	74	logplain
-rw-r--r--	savage_drv.c	3139	logplain
d---------	sis	74	logplain
-rw-r--r--	sis_drv.c	2994	logplain
d---------	tdfx	74	logplain
-rw-r--r--	tdfx_drv.c	3037	logplain
d---------	via	74	logplain
-rw-r--r--	via_drv.c	3447	logplain

generated by cgit v1.2.3 (git 2.25.1) at 2025-10-30 20:32:03 +0000

/* mach64_state.c -- State support for mach64 (Rage Pro) driver -*- linux-c -*-
 * Created: Sun Dec 03 19:20:26 2000 by gareth@valinux.com
 *
 * Copyright 2000 Gareth Hughes
 * Copyright 2002-2003 Leif Delgass
 * 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
 * THE COPYRIGHT OWNER(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.
 *
 * Authors:
 *    Gareth Hughes <gareth@valinux.com>
 *    Leif Delgass <ldelgass@retinalburn.net>
 *    Jos�Fonseca <j_r_fonseca@yahoo.co.uk>
 */

#include "drmP.h"
#include "drm.h"
#include "mach64_drm.h"
#include "mach64_drv.h"

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

static void mach64_print_dirty(const char *msg, unsigned int flags)
{
	DRM_DEBUG("%s: (0x%x) %s%s%s%s%s%s%s%s%s%s%s%s\n",
		  msg,
		  flags,
		  (flags & MACH64_UPLOAD_DST_OFF_PITCH) ? "dst_off_pitch, " :
		  "",
		  (flags & MACH64_UPLOAD_Z_ALPHA_CNTL) ? "z_alpha_cntl, " : "",
		  (flags & MACH64_UPLOAD_SCALE_3D_CNTL) ? "scale_3d_cntl, " :
		  "", (flags & MACH64_UPLOAD_DP_FOG_CLR) ? "dp_fog_clr, " : "",
		  (flags & MACH64_UPLOAD_DP_WRITE_MASK) ? "dp_write_mask, " :
		  "",
		  (flags & MACH64_UPLOAD_DP_PIX_WIDTH) ? "dp_pix_width, " : "",
		  (flags & MACH64_UPLOAD_SETUP_CNTL) ? "setup_cntl, " : "",
		  (flags & MACH64_UPLOAD_MISC) ? "misc, " : "",
		  (flags & MACH64_UPLOAD_TEXTURE) ? "texture, " : "",
		  (flags & MACH64_UPLOAD_TEX0IMAGE) ? "tex0 image, " : "",
		  (flags & MACH64_UPLOAD_TEX1IMAGE) ? "tex1 image, " : "",
		  (flags & MACH64_UPLOAD_CLIPRECTS) ? "cliprects, " : "");
}

/* Mach64 doesn't have hardware cliprects, just one hardware scissor,
 * so the GL scissor is intersected with each cliprect here
 */
/* This function returns 0 on success, 1 for no intersection, and
 * negative for an error
 */
static int mach64_emit_cliprect(DRMFILE filp, drm_mach64_private_t * dev_priv,
				drm_clip_rect_t * box)
{
	u32 sc_left_right, sc_top_bottom;
	drm_clip_rect_t scissor;
	drm_mach64_sarea_t *sarea_priv = dev_priv->sarea_priv;
	drm_mach64_context_regs_t *regs = &sarea_priv->context_state;
	DMALOCALS;

	DRM_DEBUG("%s: box=%p\n", __FUNCTION__, box);

	/* Get GL scissor */
	/* FIXME: store scissor in SAREA as a cliprect instead of in
	 * hardware format, or do intersection client-side
	 */
	scissor.x1 = regs->sc_left_right & 0xffff;
	scissor.x2 = (regs->sc_left_right & 0xffff0000) >> 16;
	scissor.y1 = regs->sc_top_bottom & 0xffff;
	scissor.y2 = (regs->sc_top_bottom & 0xffff0000) >> 16;

	/* Intersect GL scissor with cliprect */
	if (box->x1 > scissor.x1)
		scissor.x1 = box->x1;
	if (box->y1 > scissor.y1)
		scissor.y1 = box->y1;
	if (box->x2 < scissor.x2)
		scissor.x2 = box->x2;
	if (box->y2 < scissor.y2)
		scissor.y2 = box->y2;
	/* positive return means skip */
	if (scissor.x1 >= scissor.x2)
		return 1;
	if (scissor.y1 >= scissor.y2)
		return 1;

	DMAGETPTR(filp, dev_priv, 2);	/* returns on failure to get buffer */

	sc_left_right = ((scissor.x1 << 0) | (scissor.x2 << 16));
	sc_top_bottom = ((scissor.y1 << 0) | (scissor.y2 << 16));

	DMAOUTREG(MACH64_SC_LEFT_RIGHT, sc_left_right);
	DMAOUTREG(MACH64_SC_TOP_BOTTOM, sc_top_bottom);

	DMAADVANCE(dev_priv, 1);

	return 0;
}

static __inline__ int mach64_emit_state(DRMFILE filp,
					drm_mach64_private_t * dev_priv)
{
	drm_mach64_sarea_t *sarea_priv = dev_priv->sarea_priv;
	drm_mach64_context_regs_t *regs = &sarea_priv->context_state;
	unsigned int dirty = sarea_priv->dirty;
	u32 offset = ((regs->tex_size_pitch & 0xf0) >> 2);
	DMALOCALS;

	if (MACH64_VERBOSE) {
		mach64_print_dirty(__FUNCTION__, dirty);
	} else {
		DRM_DEBUG("%s: dirty=0x%08x\n", __FUNCTION__, dirty);
	}

	DMAGETPTR(filp, dev_priv, 17);	/* returns on failure to get buffer */

	if (dirty & MACH64_UPLOAD_MISC) {
		DMAOUTREG(MACH64_DP_MIX, regs->dp_mix);
		DMAOUTREG(MACH64_DP_SRC, regs->dp_src);
		DMAOUTREG(MACH64_CLR_CMP_CNTL, regs->clr_cmp_cntl);
		DMAOUTREG(MACH64_GUI_TRAJ_CNTL, regs->gui_traj_cntl);
		sarea_priv->dirty &= ~MACH64_UPLOAD_MISC;
	}

	if (dirty & MACH64_UPLOAD_DST_OFF_PITCH) {
		DMAOUTREG(MACH64_DST_OFF_PITCH, regs->dst_off_pitch);
		sarea_priv->dirty &= ~MACH64_UPLOAD_DST_OFF_PITCH;
	}
	if (dirty & MACH64_UPLOAD_Z_OFF_PITCH) {
		DMAOUTREG(MACH64_Z_OFF_PITCH, regs->z_off_pitch);
		sarea_priv->dirty &= ~MACH64_UPLOAD_Z_OFF_PITCH;
	}
	if (dirty & MACH64_UPLOAD_Z_ALPHA_CNTL) {
		DMAOUTREG(MACH64_Z_CNTL, regs->z_cntl);
		DMAOUTREG(MACH64_ALPHA_TST_CNTL, regs->alpha_tst_cntl);
		sarea_priv->dirty &= ~MACH64_UPLOAD_Z_ALPHA_CNTL;
	}
	if (dirty & MACH64_UPLOAD_SCALE_3D_CNTL) {
		DMAOUTREG(MACH64_SCALE_3D_CNTL, regs->scale_3d_cntl);
		sarea_priv->dirty &= ~MACH64_UPLOAD_SCALE_3D_CNTL;
	}
	if (dirty & MACH64_UPLOAD_DP_FOG_CLR) {
		DMAOUTREG(MACH64_DP_FOG_CLR, regs->dp_fog_clr);
		sarea_priv->dirty &= ~MACH64_UPLOAD_DP_FOG_CLR;
	}
	if (dirty & MACH64_UPLOAD_DP_WRITE_MASK) {
		DMAOUTREG(MACH64_DP_WRITE_MASK, regs->dp_write_mask);
		sarea_priv->dirty &= ~MACH64_UPLOAD_DP_WRITE_MASK;
	}
	if (dirty & MACH64_UPLOAD_DP_PIX_WIDTH) {
		DMAOUTREG(MACH64_DP_PIX_WIDTH, regs->dp_pix_width);
		sarea_priv->dirty &= ~MACH64_UPLOAD_DP_PIX_WIDTH;
	}
	if (dirty & MACH64_UPLOAD_SETUP_CNTL) {
		DMAOUTREG(MACH64_SETUP_CNTL, regs->setup_cntl);
		sarea_priv->dirty &= ~MACH64_UPLOAD_SETUP_CNTL;
	}

	if (dirty & MACH64_UPLOAD_TEXTURE) {
		DMAOUTREG(MACH64_TEX_SIZE_PITCH, regs->tex_size_pitch);
		DMAOUTREG(MACH64_TEX_CNTL, regs->tex_cntl);
		DMAOUTREG(MACH64_SECONDARY_TEX_OFF, regs->secondary_tex_off);
		DMAOUTREG(MACH64_TEX_0_OFF + offset, regs->tex_offset);
		sarea_priv->dirty &= ~MACH64_UPLOAD_TEXTURE;
	}

	DMAADVANCE(dev_priv, 1);

	sarea_priv->dirty &= MACH64_UPLOAD_CLIPRECTS;

	return 0;

}

/* ================================================================
 * DMA command dispatch functions
 */

static int mach64_dma_dispatch_clear(DRMFILE filp, drm_device_t * dev,
				     unsigned int flags,
				     int cx, int cy, int cw, int ch,
				     unsigned int clear_color,
				     unsigned int clear_depth)
{
	drm_mach64_private_t *dev_priv = dev->dev_private;
	drm_mach64_sarea_t *sarea_priv = dev_priv->sarea_priv;
	drm_mach64_context_regs_t *ctx = &sarea_priv->context_state;
	int nbox = sarea_priv->nbox;
	drm_clip_rect_t *pbox = sarea_priv->boxes;
	u32 fb_bpp, depth_bpp;
	int i;
	DMALOCALS;

	DRM_DEBUG("%s\n", __FUNCTION__);

	switch (dev_priv->fb_bpp) {
	case 16:
		fb_bpp = MACH64_DATATYPE_RGB565;
		break;
	case 32:
		fb_bpp = MACH64_DATATYPE_ARGB8888;
		break;
	default:
		return DRM_ERR(EINVAL);
	}
	switch (dev_priv->depth_bpp) {
	case 16:
		depth_bpp = MACH64_DATATYPE_RGB565;
		break;
	case 24:
	case 32:
		depth_bpp = MACH64_DATATYPE_ARGB8888;
		break;
	default:
		return DRM_ERR(EINVAL);
	}

	if (!nbox)
		return 0;

	DMAGETPTR(filp, dev_priv, nbox * 31);	/* returns on failure to get buffer */

	for (i = 0; i < nbox; i++) {
		int x = pbox[i].x1;
		int y = pbox[i].y1;
		int w = pbox[i].x2 - x;
		int h = pbox[i].y2 - y;

		DRM_DEBUG("dispatch clear %d,%d-%d,%d flags 0x%x\n",
			  pbox[i].x1, pbox[i].y1,
			  pbox[i].x2, pbox[i].y2, flags);

		if (flags & (MACH64_FRONT | MACH64_BACK)) {
			/* Setup for color buffer clears
			 */

			DMAOUTREG(MACH64_Z_CNTL, 0);
			DMAOUTREG(MACH64_SCALE_3D_CNTL, 0);

			DMAOUTREG(MACH64_SC_LEFT_RIGHT, ctx->sc_left_right);
			DMAOUTREG(MACH64_SC_TOP_BOTTOM, ctx->sc_top_bottom);

			DMAOUTREG(MACH64_CLR_CMP_CNTL, 0);
			DMAOUTREG(MACH64_GUI_TRAJ_CNTL,
				  (MACH64_DST_X_LEFT_TO_RIGHT |
				   MACH64_DST_Y_TOP_TO_BOTTOM));

			DMAOUTREG(MACH64_DP_PIX_WIDTH, ((fb_bpp << 0) |
							(fb_bpp << 4) |
							(fb_bpp << 8) |
							(fb_bpp << 16) |
							(fb_bpp << 28)));

			DMAOUTREG(MACH64_DP_FRGD_CLR, clear_color);
			DMAOUTREG(MACH64_DP_WRITE_MASK, ctx->dp_write_mask);
			DMAOUTREG(MACH64_DP_MIX, (MACH64_BKGD_MIX_D |
						  MACH64_FRGD_MIX_S));
			DMAOUTREG(MACH64_DP_SRC, (MACH64_BKGD_SRC_FRGD_CLR |
						  MACH64_FRGD_SRC_FRGD_CLR |
						  MACH64_MONO_SRC_ONE));

		}

		if (flags & MACH64_FRONT) {

			DMAOUTREG(MACH64_DST_OFF_PITCH,
				  dev_priv->front_offset_pitch);
			DMAOUTREG(MACH64_DST_X_Y, (y << 16) | x);
			DMAOUTREG(MACH64_DST_WIDTH_HEIGHT, (h << 16) | w);

		}

		if (flags & MACH64_BACK) {

			DMAOUTREG(MACH64_DST_OFF_PITCH,
				  dev_priv->back_offset_pitch);
			DMAOUTREG(MACH64_DST_X_Y, (y << 16) | x);
			DMAOUTREG(MACH64_DST_WIDTH_HEIGHT, (h << 16) | w);

		}

		if (flags & MACH64_DEPTH) {
			/* Setup for depth buffer clear
			 */
			DMAOUTREG(MACH64_Z_CNTL, 0);
			DMAOUTREG(MACH64_SCALE_3D_CNTL, 0);

			DMAOUTREG(MACH64_SC_LEFT_RIGHT, ctx->sc_left_right);
			DMAOUTREG(MACH64_SC_TOP_BOTTOM, ctx->sc_top_bottom);

			DMAOUTREG(MACH64_CLR_CMP_CNTL, 0);
			DMAOUTREG(MACH64_GUI_TRAJ_CNTL,
				  (MACH64_DST_X_LEFT_TO_RIGHT |
				   MACH64_DST_Y_TOP_TO_BOTTOM));

			DMAOUTREG(MACH64_DP_PIX_WIDTH, ((depth_bpp << 0) |
							(depth_bpp << 4) |
							(depth_bpp << 8) |
							(depth_bpp << 16) |
							(depth_bpp << 28)));

			DMAOUTREG(MACH64_DP_FRGD_CLR, clear_depth);
			DMAOUTREG(MACH64_DP_WRITE_MASK, 0xffffffff);
			DMAOUTREG(MACH64_DP_MIX, (MACH64_BKGD_MIX_D |
						  MACH64_FRGD_MIX_S));
			DMAOUTREG(MACH64_DP_SRC, (MACH64_BKGD_SRC_FRGD_CLR |
						  MACH64_FRGD_SRC_FRGD_CLR |
						  MACH64_MONO_SRC_ONE));

			DMAOUTREG(MACH64_DST_OFF_PITCH,
				  dev_priv->depth_offset_pitch);
			DMAOUTREG(MACH64_DST_X_Y, (y << 16) | x);
			DMAOUTREG(MACH64_DST_WIDTH_HEIGHT, (h << 16) | w);
		}
	}

	DMAADVANCE(dev_priv, 1);

	return 0;
}

static int mach64_dma_dispatch_swap(DRMFILE filp, drm_device_t * dev)
{
	drm_mach64_private_t *dev_priv = dev->dev_private;
	drm_mach64_sarea_t *sarea_priv = dev_priv->sarea_priv;
	int nbox = sarea_priv->nbox;
	drm_clip_rect_t *pbox = sarea_priv->boxes;
	u32 fb_bpp;
	int i;
	DMALOCALS;

	DRM_DEBUG("%s\n", __FUNCTION__);

	switch (dev_priv->fb_bpp) {
	case 16:
		fb_bpp = MACH64_DATATYPE_RGB565;
		break;
	case 32:
	default:
		fb_bpp = MACH64_DATATYPE_ARGB8888;
		break;
	}

	if (!nbox)
		return 0;

	DMAGETPTR(filp, dev_priv, 13 + nbox * 4);	/* returns on failure to get buffer */

	DMAOUTREG(MACH64_Z_CNTL, 0);
	DMAOUTREG(MACH64_SCALE_3D_CNTL, 0);

	DMAOUTREG(MACH64_SC_LEFT_RIGHT, 0 | (8191 << 16));	/* no scissor */
	DMAOUTREG(MACH64_SC_TOP_BOTTOM, 0 | (16383 << 16));

	DMAOUTREG(MACH64_CLR_CMP_CNTL, 0);
	DMAOUTREG(MACH64_GUI_TRAJ_CNTL, (MACH64_DST_X_LEFT_TO_RIGHT |
					 MACH64_DST_Y_TOP_TO_BOTTOM));

	DMAOUTREG(MACH64_DP_PIX_WIDTH, ((fb_bpp << 0) |
					(fb_bpp << 4) |
					(fb_bpp << 8) |
					(fb_bpp << 16) | (fb_bpp << 28)));

	DMAOUTREG(MACH64_DP_WRITE_MASK, 0xffffffff);
	DMAOUTREG(MACH64_DP_MIX, (MACH64_BKGD_MIX_D | MACH64_FRGD_MIX_S));
	DMAOUTREG(MACH64_DP_SRC, (MACH64_BKGD_SRC_BKGD_CLR |
				  MACH64_FRGD_SRC_BLIT | MACH64_MONO_SRC_ONE));

	DMAOUTREG(MACH64_SRC_OFF_PITCH, dev_priv->back_offset_pitch);
	DMAOUTREG(MACH64_DST_OFF_PITCH, dev_priv->front_offset_pitch);

	for (i = 0; i < nbox; i++) {
		int x = pbox[i].x1;
		int y = pbox[i].y1;
		int w = pbox[i].x2 - x;
		int h = pbox[i].y2 - y;

		DRM_DEBUG("dispatch swap %d,%d-%d,%d\n",
			  pbox[i].x1, pbox[i].y1, pbox[i].x2, pbox[i].y2);

		DMAOUTREG(MACH64_SRC_WIDTH1, w);
		DMAOUTREG(MACH64_SRC_Y_X, (x << 16) | y);
		DMAOUTREG(MACH64_DST_Y_X, (x << 16) | y);
		DMAOUTREG(MACH64_DST_WIDTH_HEIGHT, (h << 16) | w);

	}

	DMAADVANCE(dev_priv, 1);

	if (dev_priv->driver_mode == MACH64_MODE_DMA_ASYNC) {
		for (i = 0; i < MACH64_MAX_QUEUED_FRAMES - 1; i++) {
			dev_priv->frame_ofs[i] = dev_priv->frame_ofs[i + 1];
		}
		dev_priv->frame_ofs[i] = GETRINGOFFSET();

		dev_priv->sarea_priv->frames_queued++;
	}

	return 0;
}

static int mach64_do_get_frames_queued(drm_mach64_private_t * dev_priv)
{
	drm_mach64_descriptor_ring_t *ring = &dev_priv->ring;
	drm_mach64_sarea_t *sarea_priv = dev_priv->sarea_priv;
	int i, start;
	u32 head, tail, ofs;

	DRM_DEBUG("%s\n", __FUNCTION__);

	if (sarea_priv->frames_queued == 0)
		return 0;

	tail = ring->tail;
	mach64_ring_tick(dev_priv, ring);
	head = ring->head;

	start = (MACH64_MAX_QUEUED_FRAMES -
		 DRM_MIN(MACH64_MAX_QUEUED_FRAMES, sarea_priv->frames_queued));

	if (head == tail) {
		sarea_priv->frames_queued = 0;
		for (i = start; i < MACH64_MAX_QUEUED_FRAMES; i++) {
			dev_priv->frame_ofs[i] = ~0;
		}
		return 0;
	}

	for (i = start; i < MACH64_MAX_QUEUED_FRAMES; i++) {
		ofs = dev_priv->frame_ofs[i];
		DRM_DEBUG("frame_ofs[%d] ofs: %d\n", i, ofs);
		if (ofs == ~0 ||
		    (head < tail && (ofs < head || ofs >= tail)) ||
		    (head > tail && (ofs < head && ofs >= tail))) {
			sarea_priv->frames_queued =
			    (MACH64_MAX_QUEUED_FRAMES - 1) - i;
			dev_priv->frame_ofs[i] = ~0;
		}
	}

	return sarea_priv->frames_queued;
}

/* Copy and verify a client submited buffer.
 * FIXME: Make an assembly optimized version
 */
static __inline__ int copy_and_verify_from_user(u32 * to, const u32 * from,
						unsigned long bytes)
{
	unsigned long n = bytes;	/* dwords remaining in buffer */

	if (DRM_VERIFYAREA_READ(from, n)) {
		DRM_ERROR("%s: verify_area\n", __FUNCTION__);
		return DRM_ERR(EFAULT);
	}

	n >>= 2;

	while (n > 1) {
		u32 data, reg, count;

		if (DRM_GET_USER_UNCHECKED(data, from++)) {
			DRM_ERROR("%s: get_user\n", __FUNCTION__);
			return DRM_ERR(EFAULT);
		}

		n--;

		reg = le32_to_cpu(data);
		count = (reg >> 16) + 1;
		if (count <= n) {
			n -= count;
			reg &= 0xffff;

			/* This is an exact match of Mach64's Setup Engine registers,
			 * excluding SETUP_CNTL (1_C1).
			 */
			if ((reg >= 0x0190 && reg < 0x01c1) ||
			    (reg >= 0x01ca && reg <= 0x01cf)) {
				*to++ = data;
				if (DRM_COPY_FROM_USER_UNCHECKED
				    (to, from, count << 2)) {
					DRM_ERROR("%s: copy_from_user\n",
						  __FUNCTION__);
					return DRM_ERR(EFAULT);
				}
				to += count;
			} else {
				DRM_ERROR("%s: Got bad command: 0x%04x\n",
					  __FUNCTION__, reg);
				return DRM_ERR(EACCES);
			}

			from += count;
		} else {
			DRM_ERROR
			    ("%s: Got bad command count(=%u) dwords remaining=%lu\n",
			     __FUNCTION__, count, n);
			return DRM_ERR(EINVAL);
		}
	}

	if (n == 0)
		return 0;
	else {
		DRM_ERROR("%s: Bad buf->used(=%lu)\n", __FUNCTION__, bytes);
		return DRM_ERR(EINVAL);
	}
}

static int mach64_dma_dispatch_vertex(DRMFILE filp, drm_device_t * dev,
				      int prim, void *buf, unsigned long used,
				      int discard)
{
	drm_mach64_private_t *dev_priv = dev->dev_private;
	drm_mach64_sarea_t *sarea_priv = dev_priv->sarea_priv;
	drm_buf_t *copy_buf;
	int done = 0;
	int verify_ret = 0;