| /** |
| * \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; |
| |
| bitfield = NULL; |
| |
| if (bitfield_length) { |
| if (bitfield_length != dev->drw_bitfield_length) |
| bitfield = drm_alloc(bitfield_length * |
| sizeof(*bitfield), |
| DRM_MEM_BUFS); |
| |
| if (!bitfield) { |
| bitfield = dev->drw_bitfield; |
| bitfield_length = dev->drw_bitfield_length; |
| } |
| } |
| } |
| |
| if (bitfield != dev->drw_bitfield) { |
| info_length = 8 * sizeof(*bitfield) * bitfield_length; |
| |
| if (info_length) { |
| info = drm_alloc(info_length * sizeof(*info), |
| DRM_MEM_BUFS); |
| |
| if (!info) { |
| info = dev->drw_info; |
| info_length = dev->drw_info_length; |
| } |
| } else |
| info = NULL; |
| |
| spin_lock_irqsave(&dev->drw_lock, irqflags); |
| |
| if (bitfield) |
| 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) { |
| if (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); |