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freebsd-skq/sys/dev/drm/mach64_state.c
Christian Brueffer 41d7d5932e Check pointer for NULL before dereferencing it, not after. 
PR:		138383
Submitted by:	Patroklos Argyroudis <argp@census-labs.com>
Reviewed by:	rnoland
MFC after:	1 week
2009-10-21 15:54:45 +00:00

915 lines
25 KiB
C
Raw Blame History

/* 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>
* José Fonseca <j_r_fonseca@yahoo.co.uk>
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "dev/drm/drmP.h"
#include "dev/drm/drm.h"
#include "dev/drm/mach64_drm.h"
#include "dev/drm/mach64_drv.h"
/* Interface history:
*
* 1.0 - Initial mach64 DRM
*
*/
struct drm_ioctl_desc mach64_ioctls[] = {
DRM_IOCTL_DEF(DRM_MACH64_INIT, mach64_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_MACH64_CLEAR, mach64_dma_clear, DRM_AUTH),
DRM_IOCTL_DEF(DRM_MACH64_SWAP, mach64_dma_swap, DRM_AUTH),
DRM_IOCTL_DEF(DRM_MACH64_IDLE, mach64_dma_idle, DRM_AUTH),
DRM_IOCTL_DEF(DRM_MACH64_RESET, mach64_engine_reset, DRM_AUTH),
DRM_IOCTL_DEF(DRM_MACH64_VERTEX, mach64_dma_vertex, DRM_AUTH),
DRM_IOCTL_DEF(DRM_MACH64_BLIT, mach64_dma_blit, DRM_AUTH),
DRM_IOCTL_DEF(DRM_MACH64_FLUSH, mach64_dma_flush, DRM_AUTH),
DRM_IOCTL_DEF(DRM_MACH64_GETPARAM, mach64_get_param, DRM_AUTH),
};
int mach64_max_ioctl = DRM_ARRAY_SIZE(mach64_ioctls);
/* ================================================================
* 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(struct drm_file *file_priv,
drm_mach64_private_t * dev_priv,
struct drm_clip_rect * box)
{
u32 sc_left_right, sc_top_bottom;
struct drm_clip_rect scissor;
drm_mach64_sarea_t *sarea_priv = dev_priv->sarea_priv;
drm_mach64_context_regs_t *regs = &sarea_priv->context_state;
DMALOCALS;
DRM_DEBUG("box=%p\n", 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(file_priv, 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(struct drm_file *file_priv,
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("dirty=0x%08x\n", dirty);
}
DMAGETPTR(file_priv, 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(struct drm_device * dev,
struct drm_file *file_priv,
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;
struct drm_clip_rect *pbox = sarea_priv->boxes;
u32 fb_bpp, depth_bpp;
int i;
DMALOCALS;
DRM_DEBUG("\n");
switch (dev_priv->fb_bpp) {
case 16:
fb_bpp = MACH64_DATATYPE_RGB565;
break;
case 32:
fb_bpp = MACH64_DATATYPE_ARGB8888;
break;
default:
return -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 -EINVAL;
}
if (!nbox)
return 0;
DMAGETPTR(file_priv, 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(struct drm_device * dev,
struct drm_file *file_priv)
{
drm_mach64_private_t *dev_priv = dev->dev_private;
drm_mach64_sarea_t *sarea_priv = dev_priv->sarea_priv;
int nbox = sarea_priv->nbox;
struct drm_clip_rect *pbox = sarea_priv->boxes;
u32 fb_bpp;
int i;
DMALOCALS;
DRM_DEBUG("\n");
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(file_priv, 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("\n");
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_from_user_vertex(u32 *to,
const u32 __user *ufrom,
unsigned long bytes)
{
unsigned long n = bytes; /* dwords remaining in buffer */
u32 *from, *orig_from;
from = drm_alloc(bytes, DRM_MEM_DRIVER);
if (from == NULL)
return -ENOMEM;
if (DRM_COPY_FROM_USER(from, ufrom, bytes)) {
drm_free(from, bytes, DRM_MEM_DRIVER);
return -EFAULT;
}
orig_from = from; /* we'll be modifying the "from" ptr, so save it */
n >>= 2;
while (n > 1) {
u32 data, reg, count;
data = *from++;
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;
memcpy(to, from, count << 2);
from += count;
to += count;
} else {
DRM_ERROR("Got bad command: 0x%04x\n", reg);
drm_free(orig_from, bytes, DRM_MEM_DRIVER);
return -EACCES;
}
} else {
DRM_ERROR
("Got bad command count(=%u) dwords remaining=%lu\n",
count, n);
drm_free(orig_from, bytes, DRM_MEM_DRIVER);
return -EINVAL;
}
}
drm_free(orig_from, bytes, DRM_MEM_DRIVER);
if (n == 0)
return 0;
else {
DRM_ERROR("Bad buf->used(=%lu)\n", bytes);
return -EINVAL;
}
}
static int mach64_dma_dispatch_vertex(struct drm_device * dev,
struct drm_file *file_priv,
drm_mach64_vertex_t * vertex)
{
drm_mach64_private_t *dev_priv = dev->dev_private;
drm_mach64_sarea_t *sarea_priv = dev_priv->sarea_priv;
struct drm_buf *copy_buf;
void *buf = vertex->buf;
unsigned long used = vertex->used;
int ret = 0;
int i = 0;
int done = 0;
int verify_ret = 0;
DMALOCALS;
DRM_DEBUG("buf=%p used=%lu nbox=%d\n",
buf, used, sarea_priv->nbox);
if (!used)
goto _vertex_done;
copy_buf = mach64_freelist_get(dev_priv);
if (copy_buf == NULL) {
DRM_ERROR("couldn't get buffer\n");
return -EAGAIN;
}
/* Mach64's vertex data is actually register writes. To avoid security
* compromises these register writes have to be verified and copied from
* user space into a private DMA buffer.
*/
verify_ret = copy_from_user_vertex(GETBUFPTR(copy_buf), buf, used);
if (verify_ret != 0) {
mach64_freelist_put(dev_priv, copy_buf);
goto _vertex_done;
}
copy_buf->used = used;
DMASETPTR(copy_buf);
if (sarea_priv->dirty & ~MACH64_UPLOAD_CLIPRECTS) {
ret = mach64_emit_state(file_priv, dev_priv);
if (ret < 0)
return ret;
}
do {
/* Emit the next cliprect */
if (i < sarea_priv->nbox) {
ret = mach64_emit_cliprect(file_priv, dev_priv,
&sarea_priv->boxes[i]);
if (ret < 0) {
/* failed to get buffer */
return ret;
} else if (ret != 0) {
/* null intersection with scissor */
continue;
}
}
if ((i >= sarea_priv->nbox - 1))
done = 1;
/* Add the buffer to the DMA queue */
DMAADVANCE(dev_priv, done);
} while (++i < sarea_priv->nbox);
if (!done) {
if (copy_buf->pending) {
DMADISCARDBUF();
} else {
/* This buffer wasn't used (no cliprects), so place it
* back on the free list
*/
mach64_freelist_put(dev_priv, copy_buf);
}
}
_vertex_done:
sarea_priv->dirty &= ~MACH64_UPLOAD_CLIPRECTS;
sarea_priv->nbox = 0;
return verify_ret;
}
static __inline__ int copy_from_user_blit(u32 *to,
const u32 __user *ufrom,
unsigned long bytes)
{
to = (u32 *)((char *)to + MACH64_HOSTDATA_BLIT_OFFSET);
if (DRM_COPY_FROM_USER(to, ufrom, bytes)) {
return -EFAULT;
}
return 0;
}
static int mach64_dma_dispatch_blit(struct drm_device * dev,
struct drm_file *file_priv,
drm_mach64_blit_t * blit)
{
drm_mach64_private_t *dev_priv = dev->dev_private;
int dword_shift, dwords;
unsigned long used;
struct drm_buf *copy_buf;
int verify_ret = 0;
DMALOCALS;
/* The compiler won't optimize away a division by a variable,
* even if the only legal values are powers of two. Thus, we'll
* use a shift instead.
*/
switch (blit->format) {
case MACH64_DATATYPE_ARGB8888:
dword_shift = 0;
break;
case MACH64_DATATYPE_ARGB1555:
case MACH64_DATATYPE_RGB565:
case MACH64_DATATYPE_VYUY422:
case MACH64_DATATYPE_YVYU422:
case MACH64_DATATYPE_ARGB4444:
dword_shift = 1;
break;
case MACH64_DATATYPE_CI8:
case MACH64_DATATYPE_RGB8:
dword_shift = 2;
break;
default:
DRM_ERROR("invalid blit format %d\n", blit->format);
return -EINVAL;
}
/* Set buf->used to the bytes of blit data based on the blit dimensions
* and verify the size. When the setup is emitted to the buffer with
* the DMA* macros below, buf->used is incremented to include the bytes
* used for setup as well as the blit data.
*/
dwords = (blit->width * blit->height) >> dword_shift;
used = dwords << 2;
if (used <= 0 ||
used > MACH64_BUFFER_SIZE - MACH64_HOSTDATA_BLIT_OFFSET) {
DRM_ERROR("Invalid blit size: %lu bytes\n", used);
return -EINVAL;
}
copy_buf = mach64_freelist_get(dev_priv);
if (copy_buf == NULL) {
DRM_ERROR("couldn't get buffer\n");
return -EAGAIN;
}
/* Copy the blit data from userspace.
*
* XXX: This is overkill. The most efficient solution would be having
* two sets of buffers (one set private for vertex data, the other set
* client-writable for blits). However that would bring more complexity
* and would break backward compatability. The solution currently
* implemented is keeping all buffers private, allowing to secure the
* driver, without increasing complexity at the expense of some speed
* transfering data.
*/
verify_ret = copy_from_user_blit(GETBUFPTR(copy_buf), blit->buf, used);
if (verify_ret != 0) {
mach64_freelist_put(dev_priv, copy_buf);
goto _blit_done;
}
copy_buf->used = used;
/* FIXME: Use a last buffer flag and reduce the state emitted for subsequent,
* continuation buffers?
*/
/* Blit via BM_HOSTDATA (gui-master) - like HOST_DATA[0-15], but doesn't require
* a register command every 16 dwords. State setup is added at the start of the
* buffer -- the client leaves space for this based on MACH64_HOSTDATA_BLIT_OFFSET
*/
DMASETPTR(copy_buf);
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); /* disable */
DMAOUTREG(MACH64_GUI_TRAJ_CNTL,
MACH64_DST_X_LEFT_TO_RIGHT | MACH64_DST_Y_TOP_TO_BOTTOM);
DMAOUTREG(MACH64_DP_PIX_WIDTH, (blit->format << 0) /* dst pix width */
|(blit->format << 4) /* composite pix width */
|(blit->format << 8) /* src pix width */
|(blit->format << 16) /* host data pix width */
|(blit->format << 28) /* scaler/3D pix width */
);
DMAOUTREG(MACH64_DP_WRITE_MASK, 0xffffffff); /* enable all planes */
DMAOUTREG(MACH64_DP_MIX, MACH64_BKGD_MIX_D | MACH64_FRGD_MIX_S);
DMAOUTREG(MACH64_DP_SRC,
MACH64_BKGD_SRC_BKGD_CLR
| MACH64_FRGD_SRC_HOST | MACH64_MONO_SRC_ONE);
DMAOUTREG(MACH64_DST_OFF_PITCH,
(blit->pitch << 22) | (blit->offset >> 3));
DMAOUTREG(MACH64_DST_X_Y, (blit->y << 16) | blit->x);
DMAOUTREG(MACH64_DST_WIDTH_HEIGHT, (blit->height << 16) | blit->width);
DRM_DEBUG("%lu bytes\n", used);
/* Add the buffer to the queue */
DMAADVANCEHOSTDATA(dev_priv);
_blit_done:
return verify_ret;
}
/* ================================================================
* IOCTL functions
*/
int mach64_dma_clear(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
drm_mach64_private_t *dev_priv = dev->dev_private;
drm_mach64_sarea_t *sarea_priv = dev_priv->sarea_priv;
drm_mach64_clear_t *clear = data;
int ret;
DRM_DEBUG("pid=%d\n", DRM_CURRENTPID);
LOCK_TEST_WITH_RETURN(dev, file_priv);
if (sarea_priv->nbox > MACH64_NR_SAREA_CLIPRECTS)
sarea_priv->nbox = MACH64_NR_SAREA_CLIPRECTS;
ret = mach64_dma_dispatch_clear(dev, file_priv, clear->flags,
clear->x, clear->y, clear->w, clear->h,
clear->clear_color,
clear->clear_depth);
/* Make sure we restore the 3D state next time.
*/
sarea_priv->dirty |= (MACH64_UPLOAD_CONTEXT | MACH64_UPLOAD_MISC);
return ret;
}
int mach64_dma_swap(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
drm_mach64_private_t *dev_priv = dev->dev_private;
drm_mach64_sarea_t *sarea_priv = dev_priv->sarea_priv;
int ret;
DRM_DEBUG("pid=%d\n", DRM_CURRENTPID);
LOCK_TEST_WITH_RETURN(dev, file_priv);
if (sarea_priv->nbox > MACH64_NR_SAREA_CLIPRECTS)
sarea_priv->nbox = MACH64_NR_SAREA_CLIPRECTS;
ret = mach64_dma_dispatch_swap(dev, file_priv);
/* Make sure we restore the 3D state next time.
*/
sarea_priv->dirty |= (MACH64_UPLOAD_CONTEXT | MACH64_UPLOAD_MISC);
return ret;
}
int mach64_dma_vertex(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
drm_mach64_private_t *dev_priv = dev->dev_private;
drm_mach64_sarea_t *sarea_priv;
drm_mach64_vertex_t *vertex = data;
LOCK_TEST_WITH_RETURN(dev, file_priv);
if (!dev_priv) {
DRM_ERROR("called with no initialization\n");
return -EINVAL;
}
sarea_priv = dev_priv->sarea_priv;
DRM_DEBUG("pid=%d buf=%p used=%lu discard=%d\n",
DRM_CURRENTPID,
vertex->buf, vertex->used, vertex->discard);
if (vertex->prim < 0 || vertex->prim > MACH64_PRIM_POLYGON) {
DRM_ERROR("buffer prim %d\n", vertex->prim);
return -EINVAL;
}
if (vertex->used > MACH64_BUFFER_SIZE || (vertex->used & 3) != 0) {
DRM_ERROR("Invalid vertex buffer size: %lu bytes\n",
vertex->used);
return -EINVAL;
}
if (sarea_priv->nbox > MACH64_NR_SAREA_CLIPRECTS)
sarea_priv->nbox = MACH64_NR_SAREA_CLIPRECTS;
return mach64_dma_dispatch_vertex(dev, file_priv, vertex);
}
int mach64_dma_blit(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
drm_mach64_private_t *dev_priv = dev->dev_private;
drm_mach64_sarea_t *sarea_priv = dev_priv->sarea_priv;
drm_mach64_blit_t *blit = data;
int ret;
LOCK_TEST_WITH_RETURN(dev, file_priv);
ret = mach64_dma_dispatch_blit(dev, file_priv, blit);
/* Make sure we restore the 3D state next time.
*/
sarea_priv->dirty |= (MACH64_UPLOAD_CONTEXT |
MACH64_UPLOAD_MISC | MACH64_UPLOAD_CLIPRECTS);
return ret;
}
int mach64_get_param(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
drm_mach64_private_t *dev_priv = dev->dev_private;
drm_mach64_getparam_t *param = data;
int value;
DRM_DEBUG("\n");
if (!dev_priv) {
DRM_ERROR("called with no initialization\n");
return -EINVAL;
}
switch (param->param) {
case MACH64_PARAM_FRAMES_QUEUED:
/* Needs lock since it calls mach64_ring_tick() */
LOCK_TEST_WITH_RETURN(dev, file_priv);
value = mach64_do_get_frames_queued(dev_priv);
break;
case MACH64_PARAM_IRQ_NR:
value = dev->irq;
break;
default:
return -EINVAL;
}
if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) {
DRM_ERROR("copy_to_user\n");
return -EFAULT;
}
return 0;
}
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