/** * \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. * Copyright 2006 Tungsten Graphics, Inc., Bismarck, North Dakota. * 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" /** * Allocate drawable ID and memory to store information about it. */ int drm_adddraw(DRM_IOCTL_ARGS) { DRM_DEVICE; unsigned long irqflags; int i, j; u32 *bitfield = dev->drw_bitfield; unsigned int bitfield_length = dev->drw_bitfield_length; drm_drawable_info_t **info = dev->drw_info; unsigned int info_length = dev->drw_info_length; drm_draw_t draw; for (i = 0, j = 0; i < bitfield_length; i++) { if (bitfield[i] == ~0) continue; for (; j < 8 * sizeof(*bitfield); j++) if (!(bitfield[i] & (1 << j))) goto done; } done: if (i == bitfield_length) { bitfield_length++; bitfield = drm_alloc(bitfield_length * sizeof(*bitfield), DRM_MEM_BUFS); if (!bitfield) { DRM_ERROR("Failed to allocate new drawable bitfield\n"); return DRM_ERR(ENOMEM); } if (8 * sizeof(*bitfield) * bitfield_length > info_length) { info_length += 8 * sizeof(*bitfield); info = drm_alloc(info_length * sizeof(*info), DRM_MEM_BUFS); if (!info) { DRM_ERROR("Failed to allocate new drawable info" " array\n"); drm_free(bitfield, bitfield_length * sizeof(*bitfield), DRM_MEM_BUFS); return DRM_ERR(ENOMEM); } } bitfield[i] = 0; } draw.handle = i * 8 * sizeof(*bitfield) + j + 1; DRM_DEBUG("%d\n", draw.handle); spin_lock_irqsave(&dev->drw_lock, irqflags); bitfield[i] |= 1 << j; info[draw.handle - 1] = NULL; if (bitfield != dev->drw_bitfield) { memcpy(bitfield, dev->drw_bitfield, dev->drw_bitfield_length * sizeof(*bitfield)); drm_free(dev->drw_bitfield, sizeof(*bitfield) * dev->drw_bitfield_length, DRM_MEM_BUFS); dev->drw_bitfield = bitfield; dev->drw_bitfield_length = bitfield_length; } if (info != dev->drw_info) { memcpy(info, dev->drw_info, dev->drw_info_length * sizeof(*info)); drm_free(dev->drw_info, sizeof(*info) * dev->drw_info_length, DRM_MEM_BUFS); dev->drw_info = info; dev->drw_info_length = info_length; } spin_unlock_irqrestore(&dev->drw_lock, irqflags); DRM_COPY_TO_USER_IOCTL((drm_draw_t __user *)data, draw, sizeof(draw)); return 0; } /** * Free drawable ID and memory to store information about it. */ int drm_rmdraw(DRM_IOCTL_ARGS) { DRM_DEVICE; drm_draw_t draw; int id, idx; unsigned int shift; unsigned long irqflags; u32 *bitfield = dev->drw_bitfield; unsigned int bitfield_length = dev->drw_bitfield_length; drm_drawable_info_t **info = dev->drw_info; unsigned int info_length = dev->drw_info_length; DRM_COPY_FROM_USER_IOCTL(draw, (drm_draw_t __user *) data, sizeof(draw)); id = draw.handle - 1; idx = id / (8 * sizeof(*bitfield)); shift = id % (8 * sizeof(*bitfield)); if (idx < 0 || idx >= bitfield_length || !(bitfield[idx] & (1 << shift))) { DRM_DEBUG("No such drawable %d\n", draw.handle); return 0; } spin_lock_irqsave(&dev->drw_lock, irqflags); bitfield[idx] &= ~(1 << shift); spin_unlock_irqrestore(&dev->drw_lock, irqflags); if (info[id]) { drm_free(info[id]->rects, info[id]->num_rects * sizeof(drm_clip_rect_t), DRM_MEM_BUFS); drm_free(info[id], sizeof(**info), DRM_MEM_BUFS); } /* Can we shrink the arrays? */ if (idx == bitfield_length - 1) { while (idx >= 0 && !bitfield[idx]) --idx; bitfield_length = idx + 1; if (idx != id / (8 * sizeof(*bitfield))) bitfield = drm_alloc(bitfield_length * sizeof(*bitfield), DRM_MEM_BUFS); if (!bitfield && bitfield_length) { bitfield = dev->drw_bitfield; bitfield_length = dev->drw_bitfield_length; } } if (bitfield != dev->drw_bitfield) { info_length = 8 * sizeof(*bitfield) * bitfield_length; info = drm_alloc(info_length * sizeof(*info), DRM_MEM_BUFS); if (!info && info_length) { info = dev->drw_info; info_length = dev->drw_info_length; } spin_lock_irqsave(&dev->drw_lock, irqflags); memcpy(bitfield, dev->drw_bitfield, bitfield_length * sizeof(*bitfield)); drm_free(dev->drw_bitfield, sizeof(*bitfield) * dev->drw_bitfield_length, DRM_MEM_BUFS); dev->drw_bitfield = bitfield; dev->drw_bitfield_length = bitfield_length; if (info != dev->drw_info) { memcpy(info, dev->drw_info, info_length * sizeof(*info)); drm_free(dev->drw_info, sizeof(*info) * dev->drw_info_length, DRM_MEM_BUFS); dev->drw_info = info; dev->drw_info_length = info_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, shift; u32 *bitfield = dev->drw_bitfield; unsigned long irqflags, bitfield_length = dev->drw_bitfield_length; drm_drawable_info_t *info; drm_clip_rect_t *rects; int err; DRM_COPY_FROM_USER_IOCTL(update, (drm_update_draw_t __user *) data, sizeof(update)); id = update.handle - 1; idx = id / (8 * sizeof(*bitfield)); shift = id % (8 * sizeof(*bitfield)); if (idx < 0 || idx >= bitfield_length || !(bitfield[idx] & (1 << shift))) { DRM_ERROR("No such drawable %d\n", update.handle); 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"); return DRM_ERR(ENOMEM); } } switch (update.type) { case DRM_DRAWABLE_CLIPRECTS: if (update.num != info->num_rects) { rects = drm_alloc(update.num * sizeof(drm_clip_rect_t), DRM_MEM_BUFS); } else rects = info->rects; if (update.num && !rects) { DRM_ERROR("Failed to allocate cliprect memory\n"); err = DRM_ERR(ENOMEM); goto error; } if (update.num && DRM_COPY_FROM_USER(rects, (drm_clip_rect_t __user *) (unsigned long)update.data, update.num * sizeof(*rects))) { DRM_ERROR("Failed to copy cliprects from userspace\n"); err = DRM_ERR(EFAULT); goto error; } spin_lock_irqsave(&dev->drw_lock, irqflags); if (rects != info->rects) { drm_free(info->rects, info->num_rects * sizeof(drm_clip_rect_t), DRM_MEM_BUFS); } info->rects = rects; info->num_rects = update.num; dev->drw_info[id] = info; spin_unlock_irqrestore(&dev->drw_lock, irqflags); DRM_DEBUG("Updated %d cliprects for drawable %d\n", info->num_rects, id); break; default: DRM_ERROR("Invalid update type %d\n", update.type); return DRM_ERR(EINVAL); } return 0; error: if (!dev->drw_info[id]) drm_free(info, sizeof(*info), DRM_MEM_BUFS); else if (rects != dev->drw_info[id]->rects) drm_free(rects, update.num * sizeof(drm_clip_rect_t), DRM_MEM_BUFS); return err; } /** * Caller must hold the drawable spinlock! */ drm_drawable_info_t *drm_get_drawable_info(drm_device_t *dev, drm_drawable_t id) { u32 *bitfield = dev->drw_bitfield; unsigned int idx, shift; id--; idx = id / (8 * sizeof(*bitfield)); shift = id % (8 * sizeof(*bitfield)); if (idx < 0 || idx >= dev->drw_bitfield_length || !(bitfield[idx] & (1 << shift))) { DRM_DEBUG("No such drawable %d\n", id); return NULL; } return dev->drw_info[id]; } EXPORT_SYMBOL(drm_get_drawable_info);