via_mm.c revision 1.2
1/* 2 * Copyright 2006 Tungsten Graphics Inc., Bismarck, ND., USA. 3 * All rights reserved. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sub license, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice (including the 13 * next paragraph) shall be included in all copies or substantial portions 14 * of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, 20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 22 * DEALINGS IN THE SOFTWARE. 23 */ 24/* 25 * Authors: Thomas Hellstr��m <thomas-at-tungstengraphics-dot-com> 26 */ 27 28#include <drm/drmP.h> 29#include <drm/via_drm.h> 30#include "via_drv.h" 31 32#define VIA_MM_ALIGN_SHIFT 4 33#define VIA_MM_ALIGN_MASK ((1 << VIA_MM_ALIGN_SHIFT) - 1) 34 35struct via_memblock { 36 struct drm_mm_node mm_node; 37 struct list_head owner_list; 38}; 39 40int via_agp_init(struct drm_device *dev, void *data, struct drm_file *file_priv) 41{ 42 drm_via_agp_t *agp = data; 43 drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; 44 45 mutex_lock(&dev->struct_mutex); 46 drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> VIA_MM_ALIGN_SHIFT); 47 48 dev_priv->agp_initialized = 1; 49 dev_priv->agp_offset = agp->offset; 50 mutex_unlock(&dev->struct_mutex); 51 52 DRM_DEBUG("offset = %u, size = %u\n", agp->offset, agp->size); 53 return 0; 54} 55 56int via_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv) 57{ 58 drm_via_fb_t *fb = data; 59 drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; 60 61 mutex_lock(&dev->struct_mutex); 62 drm_mm_init(&dev_priv->vram_mm, 0, fb->size >> VIA_MM_ALIGN_SHIFT); 63 64 dev_priv->vram_initialized = 1; 65 dev_priv->vram_offset = fb->offset; 66 67 mutex_unlock(&dev->struct_mutex); 68 DRM_DEBUG("offset = %u, size = %u\n", fb->offset, fb->size); 69 70 return 0; 71 72} 73 74int via_final_context(struct drm_device *dev, int context) 75{ 76 drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; 77 78 via_release_futex(dev_priv, context); 79 80 /* Linux specific until context tracking code gets ported to BSD */ 81 /* Last context, perform cleanup */ 82 if (list_is_singular(&dev->ctxlist)) { 83 DRM_DEBUG("Last Context\n"); 84 drm_irq_uninstall(dev); 85 via_cleanup_futex(dev_priv); 86 via_do_cleanup_map(dev); 87 } 88 return 1; 89} 90 91void via_lastclose(struct drm_device *dev) 92{ 93 drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; 94 95 if (!dev_priv) 96 return; 97 98 mutex_lock(&dev->struct_mutex); 99 if (dev_priv->vram_initialized) { 100 drm_mm_takedown(&dev_priv->vram_mm); 101 dev_priv->vram_initialized = 0; 102 } 103 if (dev_priv->agp_initialized) { 104 drm_mm_takedown(&dev_priv->agp_mm); 105 dev_priv->agp_initialized = 0; 106 } 107 mutex_unlock(&dev->struct_mutex); 108} 109 110int via_mem_alloc(struct drm_device *dev, void *data, 111 struct drm_file *file) 112{ 113 drm_via_mem_t *mem = data; 114 int retval = 0, user_key; 115 struct via_memblock *item; 116 drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; 117 struct via_file_private *file_priv = file->driver_priv; 118 unsigned long tmpSize; 119 120 if (mem->type > VIA_MEM_AGP) { 121 DRM_ERROR("Unknown memory type allocation\n"); 122 return -EINVAL; 123 } 124 mutex_lock(&dev->struct_mutex); 125 if (0 == ((mem->type == VIA_MEM_VIDEO) ? dev_priv->vram_initialized : 126 dev_priv->agp_initialized)) { 127 DRM_ERROR 128 ("Attempt to allocate from uninitialized memory manager.\n"); 129 mutex_unlock(&dev->struct_mutex); 130 return -EINVAL; 131 } 132 133 item = kzalloc(sizeof(*item), GFP_KERNEL); 134 if (!item) { 135 retval = -ENOMEM; 136 goto fail_alloc; 137 } 138 139 tmpSize = (mem->size + VIA_MM_ALIGN_MASK) >> VIA_MM_ALIGN_SHIFT; 140 if (mem->type == VIA_MEM_AGP) 141 retval = drm_mm_insert_node(&dev_priv->agp_mm, 142 &item->mm_node, 143 tmpSize, 0, DRM_MM_SEARCH_DEFAULT); 144 else 145 retval = drm_mm_insert_node(&dev_priv->vram_mm, 146 &item->mm_node, 147 tmpSize, 0, DRM_MM_SEARCH_DEFAULT); 148 if (retval) 149 goto fail_alloc; 150 151 retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL); 152 if (retval < 0) 153 goto fail_idr; 154 user_key = retval; 155 156 list_add(&item->owner_list, &file_priv->obj_list); 157 mutex_unlock(&dev->struct_mutex); 158 159 mem->offset = ((mem->type == VIA_MEM_VIDEO) ? 160 dev_priv->vram_offset : dev_priv->agp_offset) + 161 ((item->mm_node.start) << VIA_MM_ALIGN_SHIFT); 162 mem->index = user_key; 163 164 return 0; 165 166fail_idr: 167 drm_mm_remove_node(&item->mm_node); 168fail_alloc: 169 kfree(item); 170 mutex_unlock(&dev->struct_mutex); 171 172 mem->offset = 0; 173 mem->size = 0; 174 mem->index = 0; 175 DRM_DEBUG("Video memory allocation failed\n"); 176 177 return retval; 178} 179 180int via_mem_free(struct drm_device *dev, void *data, struct drm_file *file_priv) 181{ 182 drm_via_private_t *dev_priv = dev->dev_private; 183 drm_via_mem_t *mem = data; 184 struct via_memblock *obj; 185 186 mutex_lock(&dev->struct_mutex); 187 obj = idr_find(&dev_priv->object_idr, mem->index); 188 if (obj == NULL) { 189 mutex_unlock(&dev->struct_mutex); 190 return -EINVAL; 191 } 192 193 idr_remove(&dev_priv->object_idr, mem->index); 194 list_del(&obj->owner_list); 195 drm_mm_remove_node(&obj->mm_node); 196 kfree(obj); 197 mutex_unlock(&dev->struct_mutex); 198 199 DRM_DEBUG("free = 0x%lx\n", mem->index); 200 201 return 0; 202} 203 204 205void via_reclaim_buffers_locked(struct drm_device *dev, 206 struct drm_file *file) 207{ 208 struct via_file_private *file_priv = file->driver_priv; 209 struct via_memblock *entry, *next; 210 211 if (!(file->minor->master && file->master->lock.hw_lock)) 212 return; 213 214 drm_idlelock_take(&file->master->lock); 215 216 mutex_lock(&dev->struct_mutex); 217 if (list_empty(&file_priv->obj_list)) { 218 mutex_unlock(&dev->struct_mutex); 219 drm_idlelock_release(&file->master->lock); 220 221 return; 222 } 223 224 via_driver_dma_quiescent(dev); 225 226 list_for_each_entry_safe(entry, next, &file_priv->obj_list, 227 owner_list) { 228 list_del(&entry->owner_list); 229 drm_mm_remove_node(&entry->mm_node); 230 kfree(entry); 231 } 232 mutex_unlock(&dev->struct_mutex); 233 234 drm_idlelock_release(&file->master->lock); 235 236 return; 237} 238