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330 lines
8.6 KiB
330 lines
8.6 KiB
/**
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* \file drm_drawable.c
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* IOCTLs for drawables
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*
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* \author Rickard E. (Rik) Faith <faith@valinux.com>
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* \author Gareth Hughes <gareth@valinux.com>
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* \author Michel Dänzer <michel@tungstengraphics.com>
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*/
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/*
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* Created: Tue Feb 2 08:37:54 1999 by faith@valinux.com
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*
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* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* Copyright 2006 Tungsten Graphics, Inc., Bismarck, North Dakota.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "drmP.h"
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/**
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* Allocate drawable ID and memory to store information about it.
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*/
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int drm_adddraw(DRM_IOCTL_ARGS)
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{
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DRM_DEVICE;
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unsigned long irqflags;
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int i, j;
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u32 *bitfield = dev->drw_bitfield;
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unsigned int bitfield_length = dev->drw_bitfield_length;
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drm_drawable_info_t **info = dev->drw_info;
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unsigned int info_length = dev->drw_info_length;
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drm_draw_t draw;
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for (i = 0, j = 0; i < bitfield_length; i++) {
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if (bitfield[i] == ~0)
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continue;
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for (; j < 8 * sizeof(*bitfield); j++)
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if (!(bitfield[i] & (1 << j)))
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goto done;
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}
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done:
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if (i == bitfield_length) {
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bitfield_length++;
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bitfield = drm_alloc(bitfield_length * sizeof(*bitfield),
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DRM_MEM_BUFS);
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if (!bitfield) {
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DRM_ERROR("Failed to allocate new drawable bitfield\n");
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return DRM_ERR(ENOMEM);
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}
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if (8 * sizeof(*bitfield) * bitfield_length > info_length) {
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info_length += 8 * sizeof(*bitfield);
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info = drm_alloc(info_length * sizeof(*info),
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DRM_MEM_BUFS);
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if (!info) {
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DRM_ERROR("Failed to allocate new drawable info"
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" array\n");
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drm_free(bitfield,
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bitfield_length * sizeof(*bitfield),
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DRM_MEM_BUFS);
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return DRM_ERR(ENOMEM);
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}
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}
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bitfield[i] = 0;
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}
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draw.handle = i * 8 * sizeof(*bitfield) + j + 1;
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DRM_DEBUG("%d\n", draw.handle);
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spin_lock_irqsave(&dev->drw_lock, irqflags);
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bitfield[i] |= 1 << j;
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info[draw.handle - 1] = NULL;
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if (bitfield != dev->drw_bitfield) {
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memcpy(bitfield, dev->drw_bitfield, dev->drw_bitfield_length *
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sizeof(*bitfield));
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drm_free(dev->drw_bitfield, sizeof(*bitfield) *
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dev->drw_bitfield_length, DRM_MEM_BUFS);
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dev->drw_bitfield = bitfield;
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dev->drw_bitfield_length = bitfield_length;
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}
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if (info != dev->drw_info) {
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memcpy(info, dev->drw_info, dev->drw_info_length *
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sizeof(*info));
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drm_free(dev->drw_info, sizeof(*info) * dev->drw_info_length,
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DRM_MEM_BUFS);
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dev->drw_info = info;
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dev->drw_info_length = info_length;
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}
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spin_unlock_irqrestore(&dev->drw_lock, irqflags);
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DRM_COPY_TO_USER_IOCTL((drm_draw_t __user *)data, draw, sizeof(draw));
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return 0;
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}
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/**
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* Free drawable ID and memory to store information about it.
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*/
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int drm_rmdraw(DRM_IOCTL_ARGS)
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{
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DRM_DEVICE;
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drm_draw_t draw;
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int id, idx;
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unsigned int shift;
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unsigned long irqflags;
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u32 *bitfield = dev->drw_bitfield;
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unsigned int bitfield_length = dev->drw_bitfield_length;
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drm_drawable_info_t **info = dev->drw_info;
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unsigned int info_length = dev->drw_info_length;
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DRM_COPY_FROM_USER_IOCTL(draw, (drm_draw_t __user *) data,
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sizeof(draw));
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id = draw.handle - 1;
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idx = id / (8 * sizeof(*bitfield));
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shift = id % (8 * sizeof(*bitfield));
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if (idx < 0 || idx >= bitfield_length ||
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!(bitfield[idx] & (1 << shift))) {
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DRM_DEBUG("No such drawable %d\n", draw.handle);
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return 0;
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}
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spin_lock_irqsave(&dev->drw_lock, irqflags);
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bitfield[idx] &= ~(1 << shift);
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spin_unlock_irqrestore(&dev->drw_lock, irqflags);
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if (info[id]) {
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drm_free(info[id]->rects, info[id]->num_rects *
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sizeof(drm_clip_rect_t), DRM_MEM_BUFS);
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drm_free(info[id], sizeof(**info), DRM_MEM_BUFS);
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}
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/* Can we shrink the arrays? */
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if (idx == bitfield_length - 1) {
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while (idx >= 0 && !bitfield[idx])
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--idx;
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bitfield_length = idx + 1;
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if (idx != id / (8 * sizeof(*bitfield)))
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bitfield = drm_alloc(bitfield_length *
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sizeof(*bitfield), DRM_MEM_BUFS);
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if (!bitfield && bitfield_length) {
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bitfield = dev->drw_bitfield;
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bitfield_length = dev->drw_bitfield_length;
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}
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}
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if (bitfield != dev->drw_bitfield) {
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info_length = 8 * sizeof(*bitfield) * bitfield_length;
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info = drm_alloc(info_length * sizeof(*info), DRM_MEM_BUFS);
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if (!info && info_length) {
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info = dev->drw_info;
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info_length = dev->drw_info_length;
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}
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spin_lock_irqsave(&dev->drw_lock, irqflags);
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memcpy(bitfield, dev->drw_bitfield, bitfield_length *
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sizeof(*bitfield));
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drm_free(dev->drw_bitfield, sizeof(*bitfield) *
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dev->drw_bitfield_length, DRM_MEM_BUFS);
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dev->drw_bitfield = bitfield;
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dev->drw_bitfield_length = bitfield_length;
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if (info != dev->drw_info) {
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memcpy(info, dev->drw_info, info_length *
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sizeof(*info));
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drm_free(dev->drw_info, sizeof(*info) *
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dev->drw_info_length, DRM_MEM_BUFS);
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dev->drw_info = info;
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dev->drw_info_length = info_length;
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}
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spin_unlock_irqrestore(&dev->drw_lock, irqflags);
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}
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DRM_DEBUG("%d\n", draw.handle);
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return 0;
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}
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int drm_update_drawable_info(DRM_IOCTL_ARGS) {
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DRM_DEVICE;
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drm_update_draw_t update;
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unsigned int id, idx, shift;
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u32 *bitfield = dev->drw_bitfield;
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unsigned long irqflags, bitfield_length = dev->drw_bitfield_length;
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drm_drawable_info_t *info;
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drm_clip_rect_t *rects;
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int err;
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DRM_COPY_FROM_USER_IOCTL(update, (drm_update_draw_t __user *) data,
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sizeof(update));
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id = update.handle - 1;
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idx = id / (8 * sizeof(*bitfield));
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shift = id % (8 * sizeof(*bitfield));
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if (idx < 0 || idx >= bitfield_length ||
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!(bitfield[idx] & (1 << shift))) {
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DRM_ERROR("No such drawable %d\n", update.handle);
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return DRM_ERR(EINVAL);
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}
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info = dev->drw_info[id];
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if (!info) {
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info = drm_calloc(1, sizeof(drm_drawable_info_t), DRM_MEM_BUFS);
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if (!info) {
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DRM_ERROR("Failed to allocate drawable info memory\n");
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return DRM_ERR(ENOMEM);
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}
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}
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switch (update.type) {
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case DRM_DRAWABLE_CLIPRECTS:
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if (update.num != info->num_rects) {
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rects = drm_alloc(update.num * sizeof(drm_clip_rect_t),
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DRM_MEM_BUFS);
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} else
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rects = info->rects;
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if (update.num && !rects) {
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DRM_ERROR("Failed to allocate cliprect memory\n");
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err = DRM_ERR(ENOMEM);
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goto error;
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}
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if (update.num && DRM_COPY_FROM_USER(rects,
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(drm_clip_rect_t __user *)
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(unsigned long)update.data,
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update.num *
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sizeof(*rects))) {
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DRM_ERROR("Failed to copy cliprects from userspace\n");
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err = DRM_ERR(EFAULT);
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goto error;
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}
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spin_lock_irqsave(&dev->drw_lock, irqflags);
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if (rects != info->rects) {
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drm_free(info->rects, info->num_rects *
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sizeof(drm_clip_rect_t), DRM_MEM_BUFS);
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}
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info->rects = rects;
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info->num_rects = update.num;
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dev->drw_info[id] = info;
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spin_unlock_irqrestore(&dev->drw_lock, irqflags);
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DRM_DEBUG("Updated %d cliprects for drawable %d\n",
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info->num_rects, id);
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break;
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default:
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DRM_ERROR("Invalid update type %d\n", update.type);
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return DRM_ERR(EINVAL);
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}
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return 0;
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error:
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if (!dev->drw_info[id])
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drm_free(info, sizeof(*info), DRM_MEM_BUFS);
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else if (rects != dev->drw_info[id]->rects)
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drm_free(rects, update.num *
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sizeof(drm_clip_rect_t), DRM_MEM_BUFS);
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return err;
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}
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/**
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* Caller must hold the drawable spinlock!
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*/
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drm_drawable_info_t *drm_get_drawable_info(drm_device_t *dev, drm_drawable_t id) {
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u32 *bitfield = dev->drw_bitfield;
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unsigned int idx, shift;
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id--;
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idx = id / (8 * sizeof(*bitfield));
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shift = id % (8 * sizeof(*bitfield));
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if (idx < 0 || idx >= dev->drw_bitfield_length ||
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!(bitfield[idx] & (1 << shift))) {
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DRM_DEBUG("No such drawable %d\n", id);
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return NULL;
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}
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return dev->drw_info[id];
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}
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EXPORT_SYMBOL(drm_get_drawable_info);
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