/** * \file drm_drawable.c * IOCTLs for drawables * * \author Rickard E. (Rik) Faith * \author Gareth Hughes * \author Michel Dänzer */ /* * 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 int 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 int 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 int 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]; }