drm/via/via_mm.c

0001 /*
0002  * Copyright 2006 Tungsten Graphics Inc., Bismarck, ND., USA.
0003  * All rights reserved.
0004  *
0005  * Permission is hereby granted, free of charge, to any person obtaining a
0006  * copy of this software and associated documentation files (the "Software"),
0007  * to deal in the Software without restriction, including without limitation
0008  * the rights to use, copy, modify, merge, publish, distribute, sub license,
0009  * and/or sell copies of the Software, and to permit persons to whom the
0010  * Software is furnished to do so, subject to the following conditions:
0011  *
0012  * The above copyright notice and this permission notice (including the
0013  * next paragraph) shall be included in all copies or substantial portions
0014  * of the Software.
0015  *
0016  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0017  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0018  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
0019  * THE AUTHORS OR COPYRIGHT HOLDERS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
0020  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0021  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
0022  * DEALINGS IN THE SOFTWARE.
0023  */
0024 /*
0025  * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
0026  */
0027
0028 #include <linux/slab.h>
0029
0030 #include <drm/drm_device.h>
0031 #include <drm/drm_file.h>
0032 #include <drm/via_drm.h>
0033
0034 #include "via_drv.h"
0035
0036 #define VIA_MM_ALIGN_SHIFT 4
0037 #define VIA_MM_ALIGN_MASK ((1 << VIA_MM_ALIGN_SHIFT) - 1)
0038
0039 struct via_memblock {
0040     struct drm_mm_node mm_node;
0041     struct list_head owner_list;
0042 };
0043
0044 int via_agp_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
0045 {
0046     drm_via_agp_t *agp = data;
0047     drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
0048
0049     mutex_lock(&dev->struct_mutex);
0050     drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> VIA_MM_ALIGN_SHIFT);
0051
0052     dev_priv->agp_initialized = 1;
0053     dev_priv->agp_offset = agp->offset;
0054     mutex_unlock(&dev->struct_mutex);
0055
0056     DRM_DEBUG("offset = %u, size = %u\n", agp->offset, agp->size);
0057     return 0;
0058 }
0059
0060 int via_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
0061 {
0062     drm_via_fb_t *fb = data;
0063     drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
0064
0065     mutex_lock(&dev->struct_mutex);
0066     drm_mm_init(&dev_priv->vram_mm, 0, fb->size >> VIA_MM_ALIGN_SHIFT);
0067
0068     dev_priv->vram_initialized = 1;
0069     dev_priv->vram_offset = fb->offset;
0070
0071     mutex_unlock(&dev->struct_mutex);
0072     DRM_DEBUG("offset = %u, size = %u\n", fb->offset, fb->size);
0073
0074     return 0;
0075
0076 }
0077
0078 int via_final_context(struct drm_device *dev, int context)
0079 {
0080     drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
0081
0082     via_release_futex(dev_priv, context);
0083
0084     /* Linux specific until context tracking code gets ported to BSD */
0085     /* Last context, perform cleanup */
0086     if (list_is_singular(&dev->ctxlist)) {
0087         DRM_DEBUG("Last Context\n");
0088         drm_legacy_irq_uninstall(dev);
0089         via_cleanup_futex(dev_priv);
0090         via_do_cleanup_map(dev);
0091     }
0092     return 1;
0093 }
0094
0095 void via_lastclose(struct drm_device *dev)
0096 {
0097     drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
0098
0099     if (!dev_priv)
0100         return;
0101
0102     mutex_lock(&dev->struct_mutex);
0103     if (dev_priv->vram_initialized) {
0104         drm_mm_takedown(&dev_priv->vram_mm);
0105         dev_priv->vram_initialized = 0;
0106     }
0107     if (dev_priv->agp_initialized) {
0108         drm_mm_takedown(&dev_priv->agp_mm);
0109         dev_priv->agp_initialized = 0;
0110     }
0111     mutex_unlock(&dev->struct_mutex);
0112 }
0113
0114 int via_mem_alloc(struct drm_device *dev, void *data,
0115           struct drm_file *file)
0116 {
0117     drm_via_mem_t *mem = data;
0118     int retval = 0, user_key;
0119     struct via_memblock *item;
0120     drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
0121     struct via_file_private *file_priv = file->driver_priv;
0122     unsigned long tmpSize;
0123
0124     if (mem->type > VIA_MEM_AGP) {
0125         DRM_ERROR("Unknown memory type allocation\n");
0126         return -EINVAL;
0127     }
0128     mutex_lock(&dev->struct_mutex);
0129     if (0 == ((mem->type == VIA_MEM_VIDEO) ? dev_priv->vram_initialized :
0130               dev_priv->agp_initialized)) {
0131         mutex_unlock(&dev->struct_mutex);
0132         DRM_ERROR
0133             ("Attempt to allocate from uninitialized memory manager.\n");
0134         return -EINVAL;
0135     }
0136
0137     item = kzalloc(sizeof(*item), GFP_KERNEL);
0138     if (!item) {
0139         retval = -ENOMEM;
0140         goto fail_alloc;
0141     }
0142
0143     tmpSize = (mem->size + VIA_MM_ALIGN_MASK) >> VIA_MM_ALIGN_SHIFT;
0144     if (mem->type == VIA_MEM_AGP)
0145         retval = drm_mm_insert_node(&dev_priv->agp_mm,
0146                         &item->mm_node,
0147                         tmpSize);
0148     else
0149         retval = drm_mm_insert_node(&dev_priv->vram_mm,
0150                         &item->mm_node,
0151                         tmpSize);
0152     if (retval)
0153         goto fail_alloc;
0154
0155     retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL);
0156     if (retval < 0)
0157         goto fail_idr;
0158     user_key = retval;
0159
0160     list_add(&item->owner_list, &file_priv->obj_list);
0161     mutex_unlock(&dev->struct_mutex);
0162
0163     mem->offset = ((mem->type == VIA_MEM_VIDEO) ?
0164               dev_priv->vram_offset : dev_priv->agp_offset) +
0165         ((item->mm_node.start) << VIA_MM_ALIGN_SHIFT);
0166     mem->index = user_key;
0167
0168     return 0;
0169
0170 fail_idr:
0171     drm_mm_remove_node(&item->mm_node);
0172 fail_alloc:
0173     kfree(item);
0174     mutex_unlock(&dev->struct_mutex);
0175
0176     mem->offset = 0;
0177     mem->size = 0;
0178     mem->index = 0;
0179     DRM_DEBUG("Video memory allocation failed\n");
0180
0181     return retval;
0182 }
0183
0184 int via_mem_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
0185 {
0186     drm_via_private_t *dev_priv = dev->dev_private;
0187     drm_via_mem_t *mem = data;
0188     struct via_memblock *obj;
0189
0190     mutex_lock(&dev->struct_mutex);
0191     obj = idr_find(&dev_priv->object_idr, mem->index);
0192     if (obj == NULL) {
0193         mutex_unlock(&dev->struct_mutex);
0194         return -EINVAL;
0195     }
0196
0197     idr_remove(&dev_priv->object_idr, mem->index);
0198     list_del(&obj->owner_list);
0199     drm_mm_remove_node(&obj->mm_node);
0200     kfree(obj);
0201     mutex_unlock(&dev->struct_mutex);
0202
0203     DRM_DEBUG("free = 0x%lx\n", mem->index);
0204
0205     return 0;
0206 }
0207
0208
0209 void via_reclaim_buffers_locked(struct drm_device *dev,
0210                 struct drm_file *file)
0211 {
0212     struct via_file_private *file_priv = file->driver_priv;
0213     struct via_memblock *entry, *next;
0214
0215     if (!(dev->master && file->master->lock.hw_lock))
0216         return;
0217
0218     drm_legacy_idlelock_take(&file->master->lock);
0219
0220     mutex_lock(&dev->struct_mutex);
0221     if (list_empty(&file_priv->obj_list)) {
0222         mutex_unlock(&dev->struct_mutex);
0223         drm_legacy_idlelock_release(&file->master->lock);
0224
0225         return;
0226     }
0227
0228     via_driver_dma_quiescent(dev);
0229
0230     list_for_each_entry_safe(entry, next, &file_priv->obj_list,
0231                  owner_list) {
0232         list_del(&entry->owner_list);
0233         drm_mm_remove_node(&entry->mm_node);
0234         kfree(entry);
0235     }
0236     mutex_unlock(&dev->struct_mutex);
0237
0238     drm_legacy_idlelock_release(&file->master->lock);
0239
0240     return;
0241 }