1254885Sdumbbell/* radeon_mem.c -- Simple GART/fb memory manager for radeon -*- linux-c -*- */ 2254885Sdumbbell/* 3254885Sdumbbell * Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved. 4254885Sdumbbell * 5254885Sdumbbell * The Weather Channel (TM) funded Tungsten Graphics to develop the 6254885Sdumbbell * initial release of the Radeon 8500 driver under the XFree86 license. 7254885Sdumbbell * This notice must be preserved. 8254885Sdumbbell * 9254885Sdumbbell * Permission is hereby granted, free of charge, to any person obtaining a 10254885Sdumbbell * copy of this software and associated documentation files (the "Software"), 11254885Sdumbbell * to deal in the Software without restriction, including without limitation 12254885Sdumbbell * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13254885Sdumbbell * and/or sell copies of the Software, and to permit persons to whom the 14254885Sdumbbell * Software is furnished to do so, subject to the following conditions: 15254885Sdumbbell * 16254885Sdumbbell * The above copyright notice and this permission notice (including the next 17254885Sdumbbell * paragraph) shall be included in all copies or substantial portions of the 18254885Sdumbbell * Software. 19254885Sdumbbell * 20254885Sdumbbell * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 21254885Sdumbbell * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 22254885Sdumbbell * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 23254885Sdumbbell * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 24254885Sdumbbell * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 25254885Sdumbbell * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 26254885Sdumbbell * DEALINGS IN THE SOFTWARE. 27254885Sdumbbell * 28254885Sdumbbell * Authors: 29254885Sdumbbell * Keith Whitwell <keith@tungstengraphics.com> 30254885Sdumbbell */ 31254885Sdumbbell 32254885Sdumbbell#include <sys/cdefs.h> 33254885Sdumbbell__FBSDID("$FreeBSD$"); 34254885Sdumbbell 35254885Sdumbbell#include <dev/drm2/drmP.h> 36254885Sdumbbell#include <dev/drm2/radeon/radeon_drm.h> 37254885Sdumbbell#include "radeon_drv.h" 38254885Sdumbbell 39254885Sdumbbell/* Very simple allocator for GART memory, working on a static range 40254885Sdumbbell * already mapped into each client's address space. 41254885Sdumbbell */ 42254885Sdumbbell 43254885Sdumbbellstatic struct mem_block *split_block(struct mem_block *p, int start, int size, 44254885Sdumbbell struct drm_file *file_priv) 45254885Sdumbbell{ 46254885Sdumbbell /* Maybe cut off the start of an existing block */ 47254885Sdumbbell if (start > p->start) { 48254885Sdumbbell struct mem_block *newblock = malloc(sizeof(*newblock), 49254885Sdumbbell DRM_MEM_DRIVER, M_WAITOK); 50254885Sdumbbell if (!newblock) 51254885Sdumbbell goto out; 52254885Sdumbbell newblock->start = start; 53254885Sdumbbell newblock->size = p->size - (start - p->start); 54254885Sdumbbell newblock->file_priv = NULL; 55254885Sdumbbell newblock->next = p->next; 56254885Sdumbbell newblock->prev = p; 57254885Sdumbbell p->next->prev = newblock; 58254885Sdumbbell p->next = newblock; 59254885Sdumbbell p->size -= newblock->size; 60254885Sdumbbell p = newblock; 61254885Sdumbbell } 62254885Sdumbbell 63254885Sdumbbell /* Maybe cut off the end of an existing block */ 64254885Sdumbbell if (size < p->size) { 65254885Sdumbbell struct mem_block *newblock = malloc(sizeof(*newblock), 66254885Sdumbbell DRM_MEM_DRIVER, M_WAITOK); 67254885Sdumbbell if (!newblock) 68254885Sdumbbell goto out; 69254885Sdumbbell newblock->start = start + size; 70254885Sdumbbell newblock->size = p->size - size; 71254885Sdumbbell newblock->file_priv = NULL; 72254885Sdumbbell newblock->next = p->next; 73254885Sdumbbell newblock->prev = p; 74254885Sdumbbell p->next->prev = newblock; 75254885Sdumbbell p->next = newblock; 76254885Sdumbbell p->size = size; 77254885Sdumbbell } 78254885Sdumbbell 79254885Sdumbbell out: 80254885Sdumbbell /* Our block is in the middle */ 81254885Sdumbbell p->file_priv = file_priv; 82254885Sdumbbell return p; 83254885Sdumbbell} 84254885Sdumbbell 85254885Sdumbbellstatic struct mem_block *alloc_block(struct mem_block *heap, int size, 86254885Sdumbbell int align2, struct drm_file *file_priv) 87254885Sdumbbell{ 88254885Sdumbbell struct mem_block *p; 89254885Sdumbbell int mask = (1 << align2) - 1; 90254885Sdumbbell 91254885Sdumbbell list_for_each(p, heap) { 92254885Sdumbbell int start = (p->start + mask) & ~mask; 93254885Sdumbbell if (p->file_priv == NULL && start + size <= p->start + p->size) 94254885Sdumbbell return split_block(p, start, size, file_priv); 95254885Sdumbbell } 96254885Sdumbbell 97254885Sdumbbell return NULL; 98254885Sdumbbell} 99254885Sdumbbell 100254885Sdumbbellstatic struct mem_block *find_block(struct mem_block *heap, int start) 101254885Sdumbbell{ 102254885Sdumbbell struct mem_block *p; 103254885Sdumbbell 104254885Sdumbbell list_for_each(p, heap) 105254885Sdumbbell if (p->start == start) 106254885Sdumbbell return p; 107254885Sdumbbell 108254885Sdumbbell return NULL; 109254885Sdumbbell} 110254885Sdumbbell 111254885Sdumbbellstatic void free_block(struct mem_block *p) 112254885Sdumbbell{ 113254885Sdumbbell p->file_priv = NULL; 114254885Sdumbbell 115254885Sdumbbell /* Assumes a single contiguous range. Needs a special file_priv in 116254885Sdumbbell * 'heap' to stop it being subsumed. 117254885Sdumbbell */ 118254885Sdumbbell if (p->next->file_priv == NULL) { 119254885Sdumbbell struct mem_block *q = p->next; 120254885Sdumbbell p->size += q->size; 121254885Sdumbbell p->next = q->next; 122254885Sdumbbell p->next->prev = p; 123254885Sdumbbell free(q, DRM_MEM_DRIVER); 124254885Sdumbbell } 125254885Sdumbbell 126254885Sdumbbell if (p->prev->file_priv == NULL) { 127254885Sdumbbell struct mem_block *q = p->prev; 128254885Sdumbbell q->size += p->size; 129254885Sdumbbell q->next = p->next; 130254885Sdumbbell q->next->prev = q; 131254885Sdumbbell free(p, DRM_MEM_DRIVER); 132254885Sdumbbell } 133254885Sdumbbell} 134254885Sdumbbell 135254885Sdumbbell/* Initialize. How to check for an uninitialized heap? 136254885Sdumbbell */ 137254885Sdumbbellstatic int init_heap(struct mem_block **heap, int start, int size) 138254885Sdumbbell{ 139254885Sdumbbell struct mem_block *blocks = malloc(sizeof(*blocks), 140254885Sdumbbell DRM_MEM_DRIVER, M_WAITOK); 141254885Sdumbbell 142254885Sdumbbell if (!blocks) 143254885Sdumbbell return -ENOMEM; 144254885Sdumbbell 145254885Sdumbbell *heap = malloc(sizeof(**heap), DRM_MEM_DRIVER, M_ZERO | M_WAITOK); 146254885Sdumbbell if (!*heap) { 147254885Sdumbbell free(blocks, DRM_MEM_DRIVER); 148254885Sdumbbell return -ENOMEM; 149254885Sdumbbell } 150254885Sdumbbell 151254885Sdumbbell blocks->start = start; 152254885Sdumbbell blocks->size = size; 153254885Sdumbbell blocks->file_priv = NULL; 154254885Sdumbbell blocks->next = blocks->prev = *heap; 155254885Sdumbbell 156254885Sdumbbell (*heap)->file_priv = (struct drm_file *) - 1; 157254885Sdumbbell (*heap)->next = (*heap)->prev = blocks; 158254885Sdumbbell return 0; 159254885Sdumbbell} 160254885Sdumbbell 161254885Sdumbbell/* Free all blocks associated with the releasing file. 162254885Sdumbbell */ 163254885Sdumbbellvoid radeon_mem_release(struct drm_file *file_priv, struct mem_block *heap) 164254885Sdumbbell{ 165254885Sdumbbell struct mem_block *p; 166254885Sdumbbell 167254885Sdumbbell if (!heap || !heap->next) 168254885Sdumbbell return; 169254885Sdumbbell 170254885Sdumbbell list_for_each(p, heap) { 171254885Sdumbbell if (p->file_priv == file_priv) 172254885Sdumbbell p->file_priv = NULL; 173254885Sdumbbell } 174254885Sdumbbell 175254885Sdumbbell /* Assumes a single contiguous range. Needs a special file_priv in 176254885Sdumbbell * 'heap' to stop it being subsumed. 177254885Sdumbbell */ 178254885Sdumbbell list_for_each(p, heap) { 179254885Sdumbbell while (p->file_priv == NULL && p->next->file_priv == NULL) { 180254885Sdumbbell struct mem_block *q = p->next; 181254885Sdumbbell p->size += q->size; 182254885Sdumbbell p->next = q->next; 183254885Sdumbbell p->next->prev = p; 184254885Sdumbbell free(q, DRM_MEM_DRIVER); 185254885Sdumbbell } 186254885Sdumbbell } 187254885Sdumbbell} 188254885Sdumbbell 189254885Sdumbbell/* Shutdown. 190254885Sdumbbell */ 191254885Sdumbbellvoid radeon_mem_takedown(struct mem_block **heap) 192254885Sdumbbell{ 193254885Sdumbbell struct mem_block *p; 194254885Sdumbbell 195254885Sdumbbell if (!*heap) 196254885Sdumbbell return; 197254885Sdumbbell 198254885Sdumbbell for (p = (*heap)->next; p != *heap;) { 199254885Sdumbbell struct mem_block *q = p; 200254885Sdumbbell p = p->next; 201254885Sdumbbell free(q, DRM_MEM_DRIVER); 202254885Sdumbbell } 203254885Sdumbbell 204254885Sdumbbell free(*heap, DRM_MEM_DRIVER); 205254885Sdumbbell *heap = NULL; 206254885Sdumbbell} 207254885Sdumbbell 208254885Sdumbbell/* IOCTL HANDLERS */ 209254885Sdumbbell 210254885Sdumbbellstatic struct mem_block **get_heap(drm_radeon_private_t * dev_priv, int region) 211254885Sdumbbell{ 212254885Sdumbbell switch (region) { 213254885Sdumbbell case RADEON_MEM_REGION_GART: 214254885Sdumbbell return &dev_priv->gart_heap; 215254885Sdumbbell case RADEON_MEM_REGION_FB: 216254885Sdumbbell return &dev_priv->fb_heap; 217254885Sdumbbell default: 218254885Sdumbbell return NULL; 219254885Sdumbbell } 220254885Sdumbbell} 221254885Sdumbbell 222254885Sdumbbellint radeon_mem_alloc(struct drm_device *dev, void *data, struct drm_file *file_priv) 223254885Sdumbbell{ 224254885Sdumbbell drm_radeon_private_t *dev_priv = dev->dev_private; 225254885Sdumbbell drm_radeon_mem_alloc_t *alloc = data; 226254885Sdumbbell struct mem_block *block, **heap; 227254885Sdumbbell 228254885Sdumbbell if (!dev_priv) { 229254885Sdumbbell DRM_ERROR("called with no initialization\n"); 230254885Sdumbbell return -EINVAL; 231254885Sdumbbell } 232254885Sdumbbell 233254885Sdumbbell heap = get_heap(dev_priv, alloc->region); 234254885Sdumbbell if (!heap || !*heap) 235254885Sdumbbell return -EFAULT; 236254885Sdumbbell 237254885Sdumbbell /* Make things easier on ourselves: all allocations at least 238254885Sdumbbell * 4k aligned. 239254885Sdumbbell */ 240254885Sdumbbell if (alloc->alignment < 12) 241254885Sdumbbell alloc->alignment = 12; 242254885Sdumbbell 243254885Sdumbbell block = alloc_block(*heap, alloc->size, alloc->alignment, file_priv); 244254885Sdumbbell 245254885Sdumbbell if (!block) 246254885Sdumbbell return -ENOMEM; 247254885Sdumbbell 248254885Sdumbbell if (DRM_COPY_TO_USER(alloc->region_offset, &block->start, 249254885Sdumbbell sizeof(int))) { 250254885Sdumbbell DRM_ERROR("copy_to_user\n"); 251254885Sdumbbell return -EFAULT; 252254885Sdumbbell } 253254885Sdumbbell 254254885Sdumbbell return 0; 255254885Sdumbbell} 256254885Sdumbbell 257254885Sdumbbellint radeon_mem_free(struct drm_device *dev, void *data, struct drm_file *file_priv) 258254885Sdumbbell{ 259254885Sdumbbell drm_radeon_private_t *dev_priv = dev->dev_private; 260254885Sdumbbell drm_radeon_mem_free_t *memfree = data; 261254885Sdumbbell struct mem_block *block, **heap; 262254885Sdumbbell 263254885Sdumbbell if (!dev_priv) { 264254885Sdumbbell DRM_ERROR("called with no initialization\n"); 265254885Sdumbbell return -EINVAL; 266254885Sdumbbell } 267254885Sdumbbell 268254885Sdumbbell heap = get_heap(dev_priv, memfree->region); 269254885Sdumbbell if (!heap || !*heap) 270254885Sdumbbell return -EFAULT; 271254885Sdumbbell 272254885Sdumbbell block = find_block(*heap, memfree->region_offset); 273254885Sdumbbell if (!block) 274254885Sdumbbell return -EFAULT; 275254885Sdumbbell 276254885Sdumbbell if (block->file_priv != file_priv) 277254885Sdumbbell return -EPERM; 278254885Sdumbbell 279254885Sdumbbell free_block(block); 280254885Sdumbbell return 0; 281254885Sdumbbell} 282254885Sdumbbell 283254885Sdumbbellint radeon_mem_init_heap(struct drm_device *dev, void *data, struct drm_file *file_priv) 284254885Sdumbbell{ 285254885Sdumbbell drm_radeon_private_t *dev_priv = dev->dev_private; 286254885Sdumbbell drm_radeon_mem_init_heap_t *initheap = data; 287254885Sdumbbell struct mem_block **heap; 288254885Sdumbbell 289254885Sdumbbell if (!dev_priv) { 290254885Sdumbbell DRM_ERROR("called with no initialization\n"); 291254885Sdumbbell return -EINVAL; 292254885Sdumbbell } 293254885Sdumbbell 294254885Sdumbbell heap = get_heap(dev_priv, initheap->region); 295254885Sdumbbell if (!heap) 296254885Sdumbbell return -EFAULT; 297254885Sdumbbell 298254885Sdumbbell if (*heap) { 299254885Sdumbbell DRM_ERROR("heap already initialized?"); 300254885Sdumbbell return -EFAULT; 301254885Sdumbbell } 302254885Sdumbbell 303254885Sdumbbell return init_heap(heap, initheap->start, initheap->size); 304254885Sdumbbell} 305