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/**
* \file drm_drawable.c
* IOCTLs for drawables
*
* \author Rickard E. (Rik) Faith <faith@valinux.com>
* \author Gareth Hughes <gareth@valinux.com>
* \author Michel Dänzer <michel@tungstengraphics.com>
*/
/*
* Created: Tue Feb 2 08:37:54 1999 by faith@valinux.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.
*/
#include "drmP.h"
/** No-op. */
int drm_adddraw(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
unsigned long irqflags;
int i, j = 0;
drm_draw_t draw;
spin_lock_irqsave(&dev->drw_lock, irqflags);
for (i = 0; i < dev->drw_bitfield_length; i++) {
u32 bitfield = dev->drw_bitfield[i];
if (bitfield == ~0)
continue;
for (; j < sizeof(bitfield); j++)
if (!(bitfield & (1 << j)))
goto done;
}
done:
if (i == dev->drw_bitfield_length) {
u32 *new_bitfield = drm_realloc(dev->drw_bitfield, i * 4,
(i + 1) * 4, DRM_MEM_BUFS);
if (!new_bitfield) {
DRM_ERROR("Failed to allocate new drawable bitfield\n");
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
return DRM_ERR(ENOMEM);
}
if (32 * (i + 1) > dev->drw_info_length) {
void *new_info = drm_realloc(dev->drw_info,
dev->drw_info_length *
sizeof(drm_drawable_info_t*),
32 * (i + 1) *
sizeof(drm_drawable_info_t*),
DRM_MEM_BUFS);
if (!new_info) {
DRM_ERROR("Failed to allocate new drawable info"
" array\n");
drm_free(new_bitfield, (i + 1) * 4, DRM_MEM_BUFS);
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
return DRM_ERR(ENOMEM);
}
dev->drw_info = (drm_drawable_info_t**)new_info;
}
new_bitfield[i] = 0;
dev->drw_bitfield = new_bitfield;
dev->drw_bitfield_length++;
}
dev->drw_bitfield[i] |= 1 << j;
draw.handle = i * sizeof(u32) + j;
DRM_DEBUG("%d\n", draw.handle);
dev->drw_info[draw.handle] = NULL;
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
DRM_COPY_TO_USER_IOCTL((drm_draw_t __user *)data, draw, sizeof(draw));
return 0;
}
/** No-op. */
int drm_rmdraw(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
drm_draw_t draw;
unsigned int idx, mod;
unsigned long irqflags;
DRM_COPY_FROM_USER_IOCTL(draw, (drm_draw_t __user *) data,
sizeof(draw));
idx = draw.handle / 32;
mod = draw.handle % 32;
spin_lock_irqsave(&dev->drw_lock, irqflags);
if (idx >= dev->drw_bitfield_length ||
!(dev->drw_bitfield[idx] & (1 << mod))) {
DRM_DEBUG("No such drawable %d\n", draw.handle);
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
return 0;
}
dev->drw_bitfield[idx] &= ~(1 << mod);
if (idx == (dev->drw_bitfield_length - 1)) {
while (idx >= 0 && !dev->drw_bitfield[idx])
--idx;
if (idx != draw.handle / 32) {
u32 *new_bitfield = drm_realloc(dev->drw_bitfield,
dev->drw_bitfield_length * 4,
(idx + 1) * 4,
DRM_MEM_BUFS);
if (new_bitfield || idx == -1) {
dev->drw_bitfield = new_bitfield;
dev->drw_bitfield_length = idx + 1;
}
}
}
if (32 * dev->drw_bitfield_length < dev->drw_info_length) {
void *new_info = drm_realloc(dev->drw_info,
dev->drw_info_length *
sizeof(drm_drawable_info_t*),
32 * dev->drw_bitfield_length *
sizeof(drm_drawable_info_t*),
DRM_MEM_BUFS);
if (new_info || !dev->drw_bitfield_length) {
dev->drw_info = (drm_drawable_info_t**)new_info;
dev->drw_info_length = 32 * dev->drw_bitfield_length;
}
}
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
DRM_DEBUG("%d\n", draw.handle);
return 0;
}
int drm_update_drawable_info(DRM_IOCTL_ARGS) {
DRM_DEVICE;
drm_update_draw_t update;
unsigned int id, idx, mod;
unsigned long irqflags;
drm_drawable_info_t *info;
void *new_data;
DRM_COPY_FROM_USER_IOCTL(update, (drm_update_draw_t __user *) data,
sizeof(update));
id = update.handle;
idx = id / 32;
mod = id % 32;
spin_lock_irqsave(&dev->drw_lock, irqflags);
if (idx >= dev->drw_bitfield_length ||
!(dev->drw_bitfield[idx] & (1 << mod))) {
DRM_ERROR("No such drawable %d\n", update.handle);
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
return DRM_ERR(EINVAL);
}
info = dev->drw_info[id];
if (!info) {
info = drm_calloc(1, sizeof(drm_drawable_info_t), DRM_MEM_BUFS);
if (!info) {
DRM_ERROR("Failed to allocate drawable info memory\n");
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
return DRM_ERR(ENOMEM);
}
dev->drw_info[id] = info;
}
switch (update.type) {
case DRM_DRAWABLE_CLIPRECTS:
if (update.num != info->num_rects) {
new_data = drm_alloc(update.num *
sizeof(drm_clip_rect_t),
DRM_MEM_BUFS);
if (!new_data) {
DRM_ERROR("Can't allocate cliprect memory\n");
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
return DRM_ERR(ENOMEM);
}
info->rects = new_data;
}
if (DRM_COPY_FROM_USER(info->rects,
(drm_clip_rect_t __user *)
(unsigned long)update.data,
update.num * sizeof(drm_clip_rect_t))) {
DRM_ERROR("Can't copy cliprects from userspace\n");
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
return DRM_ERR(EFAULT);
}
if (update.num != info->num_rects) {
drm_free(info->rects, info->num_rects *
sizeof(drm_clip_rect_t), DRM_MEM_BUFS);
info->num_rects = update.num;
}
DRM_DEBUG("Updated %d cliprects for drawable %d\n",
info->num_rects, id);
break;
default:
DRM_ERROR("Invalid update type %d\n", update.type);
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
return DRM_ERR(EINVAL);
}
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
return 0;
}
/**
* Caller must hold the drawable spinlock!
*/
drm_drawable_info_t *drm_get_drawable_info(drm_device_t *dev, drm_drawable_t id) {
unsigned int idx = id / 32, mod = id % 32;
if (idx >= dev->drw_bitfield_length ||
!(dev->drw_bitfield[idx] & (1 << mod))) {
DRM_DEBUG("No such drawable %d\n", id);
return NULL;
}
return dev->drw_info[id];
}
EXPORT_SYMBOL(drm_get_drawable_info);
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