1139749Simp/* radeon_mem.c -- Simple GART/fb memory manager for radeon -*- linux-c -*- */ 2139749Simp/*- 3112015Sanholt * Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved. 4145132Sanholt * 5112015Sanholt * The Weather Channel (TM) funded Tungsten Graphics to develop the 6112015Sanholt * initial release of the Radeon 8500 driver under the XFree86 license. 7112015Sanholt * This notice must be preserved. 8112015Sanholt * 9112015Sanholt * Permission is hereby granted, free of charge, to any person obtaining a 10112015Sanholt * copy of this software and associated documentation files (the "Software"), 11112015Sanholt * to deal in the Software without restriction, including without limitation 12112015Sanholt * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13112015Sanholt * and/or sell copies of the Software, and to permit persons to whom the 14112015Sanholt * Software is furnished to do so, subject to the following conditions: 15112015Sanholt * 16112015Sanholt * The above copyright notice and this permission notice (including the next 17112015Sanholt * paragraph) shall be included in all copies or substantial portions of the 18112015Sanholt * Software. 19112015Sanholt * 20112015Sanholt * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 21112015Sanholt * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 22112015Sanholt * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 23112015Sanholt * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 24112015Sanholt * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 25112015Sanholt * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 26112015Sanholt * DEALINGS IN THE SOFTWARE. 27112015Sanholt * 28112015Sanholt * Authors: 29112015Sanholt * Keith Whitwell <keith@tungstengraphics.com> 30112015Sanholt */ 31112015Sanholt 32152909Sanholt#include <sys/cdefs.h> 33152909Sanholt__FBSDID("$FreeBSD$"); 34152909Sanholt 35112015Sanholt#include "dev/drm/drmP.h" 36112015Sanholt#include "dev/drm/drm.h" 37112015Sanholt#include "dev/drm/radeon_drm.h" 38112015Sanholt#include "dev/drm/radeon_drv.h" 39112015Sanholt 40119895Sanholt/* Very simple allocator for GART memory, working on a static range 41145132Sanholt * already mapped into each client's address space. 42112015Sanholt */ 43112015Sanholt 44112015Sanholtstatic struct mem_block *split_block(struct mem_block *p, int start, int size, 45182080Srnoland struct drm_file *file_priv) 46112015Sanholt{ 47112015Sanholt /* Maybe cut off the start of an existing block */ 48112015Sanholt if (start > p->start) { 49145132Sanholt struct mem_block *newblock = 50145132Sanholt drm_alloc(sizeof(*newblock), DRM_MEM_BUFS); 51145132Sanholt if (!newblock) 52112015Sanholt goto out; 53112015Sanholt newblock->start = start; 54112015Sanholt newblock->size = p->size - (start - p->start); 55182080Srnoland newblock->file_priv = NULL; 56112015Sanholt newblock->next = p->next; 57112015Sanholt newblock->prev = p; 58112015Sanholt p->next->prev = newblock; 59112015Sanholt p->next = newblock; 60112015Sanholt p->size -= newblock->size; 61112015Sanholt p = newblock; 62112015Sanholt } 63145132Sanholt 64112015Sanholt /* Maybe cut off the end of an existing block */ 65112015Sanholt if (size < p->size) { 66145132Sanholt struct mem_block *newblock = 67145132Sanholt drm_alloc(sizeof(*newblock), DRM_MEM_BUFS); 68112015Sanholt if (!newblock) 69112015Sanholt goto out; 70112015Sanholt newblock->start = start + size; 71112015Sanholt newblock->size = p->size - size; 72182080Srnoland newblock->file_priv = NULL; 73112015Sanholt newblock->next = p->next; 74112015Sanholt newblock->prev = p; 75112015Sanholt p->next->prev = newblock; 76112015Sanholt p->next = newblock; 77112015Sanholt p->size = size; 78112015Sanholt } 79112015Sanholt 80145132Sanholt out: 81112015Sanholt /* Our block is in the middle */ 82182080Srnoland p->file_priv = file_priv; 83112015Sanholt return p; 84112015Sanholt} 85112015Sanholt 86145132Sanholtstatic struct mem_block *alloc_block(struct mem_block *heap, int size, 87182080Srnoland int align2, struct drm_file *file_priv) 88112015Sanholt{ 89112015Sanholt struct mem_block *p; 90145132Sanholt int mask = (1 << align2) - 1; 91112015Sanholt 92145132Sanholt list_for_each(p, heap) { 93112015Sanholt int start = (p->start + mask) & ~mask; 94182080Srnoland if (p->file_priv == NULL && start + size <= p->start + p->size) 95182080Srnoland return split_block(p, start, size, file_priv); 96112015Sanholt } 97112015Sanholt 98112015Sanholt return NULL; 99112015Sanholt} 100112015Sanholt 101145132Sanholtstatic struct mem_block *find_block(struct mem_block *heap, int start) 102112015Sanholt{ 103112015Sanholt struct mem_block *p; 104112015Sanholt 105145132Sanholt list_for_each(p, heap) 106112015Sanholt if (p->start == start) 107112015Sanholt return p; 108112015Sanholt 109112015Sanholt return NULL; 110112015Sanholt} 111112015Sanholt 112145132Sanholtstatic void free_block(struct mem_block *p) 113112015Sanholt{ 114182080Srnoland p->file_priv = NULL; 115112015Sanholt 116182080Srnoland /* Assumes a single contiguous range. Needs a special file_priv in 117112015Sanholt * 'heap' to stop it being subsumed. 118112015Sanholt */ 119182080Srnoland if (p->next->file_priv == NULL) { 120112015Sanholt struct mem_block *q = p->next; 121112015Sanholt p->size += q->size; 122112015Sanholt p->next = q->next; 123112015Sanholt p->next->prev = p; 124145132Sanholt drm_free(q, sizeof(*q), DRM_MEM_BUFS); 125112015Sanholt } 126112015Sanholt 127182080Srnoland if (p->prev->file_priv == NULL) { 128112015Sanholt struct mem_block *q = p->prev; 129112015Sanholt q->size += p->size; 130112015Sanholt q->next = p->next; 131112015Sanholt q->next->prev = q; 132145132Sanholt drm_free(p, sizeof(*q), DRM_MEM_BUFS); 133112015Sanholt } 134112015Sanholt} 135112015Sanholt 136112015Sanholt/* Initialize. How to check for an uninitialized heap? 137112015Sanholt */ 138112015Sanholtstatic int init_heap(struct mem_block **heap, int start, int size) 139112015Sanholt{ 140145132Sanholt struct mem_block *blocks = drm_alloc(sizeof(*blocks), DRM_MEM_BUFS); 141112015Sanholt 142145132Sanholt if (!blocks) 143182080Srnoland return -ENOMEM; 144145132Sanholt 145145132Sanholt *heap = drm_alloc(sizeof(**heap), DRM_MEM_BUFS); 146112015Sanholt if (!*heap) { 147145132Sanholt drm_free(blocks, sizeof(*blocks), DRM_MEM_BUFS); 148182080Srnoland return -ENOMEM; 149112015Sanholt } 150112015Sanholt 151112015Sanholt blocks->start = start; 152112015Sanholt blocks->size = size; 153182080Srnoland blocks->file_priv = NULL; 154112015Sanholt blocks->next = blocks->prev = *heap; 155112015Sanholt 156145132Sanholt memset(*heap, 0, sizeof(**heap)); 157182080Srnoland (*heap)->file_priv = (struct drm_file *) - 1; 158112015Sanholt (*heap)->next = (*heap)->prev = blocks; 159112015Sanholt return 0; 160112015Sanholt} 161112015Sanholt 162113995Sanholt/* Free all blocks associated with the releasing file. 163112015Sanholt */ 164182080Srnolandvoid radeon_mem_release(struct drm_file *file_priv, struct mem_block *heap) 165112015Sanholt{ 166112015Sanholt struct mem_block *p; 167112015Sanholt 168112015Sanholt if (!heap || !heap->next) 169112015Sanholt return; 170112015Sanholt 171145132Sanholt list_for_each(p, heap) { 172182080Srnoland if (p->file_priv == file_priv) 173182080Srnoland p->file_priv = NULL; 174112015Sanholt } 175112015Sanholt 176182080Srnoland /* Assumes a single contiguous range. Needs a special file_priv in 177112015Sanholt * 'heap' to stop it being subsumed. 178112015Sanholt */ 179145132Sanholt list_for_each(p, heap) { 180182080Srnoland while (p->file_priv == NULL && p->next->file_priv == NULL) { 181112015Sanholt struct mem_block *q = p->next; 182112015Sanholt p->size += q->size; 183112015Sanholt p->next = q->next; 184112015Sanholt p->next->prev = p; 185145132Sanholt drm_free(q, sizeof(*q), DRM_MEM_DRIVER); 186112015Sanholt } 187112015Sanholt } 188112015Sanholt} 189112015Sanholt 190112015Sanholt/* Shutdown. 191112015Sanholt */ 192145132Sanholtvoid radeon_mem_takedown(struct mem_block **heap) 193112015Sanholt{ 194112015Sanholt struct mem_block *p; 195145132Sanholt 196112015Sanholt if (!*heap) 197112015Sanholt return; 198112015Sanholt 199145132Sanholt for (p = (*heap)->next; p != *heap;) { 200112015Sanholt struct mem_block *q = p; 201112015Sanholt p = p->next; 202145132Sanholt drm_free(q, sizeof(*q), DRM_MEM_DRIVER); 203112015Sanholt } 204112015Sanholt 205145132Sanholt drm_free(*heap, sizeof(**heap), DRM_MEM_DRIVER); 206145132Sanholt *heap = NULL; 207112015Sanholt} 208112015Sanholt 209112015Sanholt/* IOCTL HANDLERS */ 210112015Sanholt 211145132Sanholtstatic struct mem_block **get_heap(drm_radeon_private_t * dev_priv, int region) 212112015Sanholt{ 213145132Sanholt switch (region) { 214119895Sanholt case RADEON_MEM_REGION_GART: 215145132Sanholt return &dev_priv->gart_heap; 216112015Sanholt case RADEON_MEM_REGION_FB: 217112015Sanholt return &dev_priv->fb_heap; 218112015Sanholt default: 219145132Sanholt return NULL; 220112015Sanholt } 221112015Sanholt} 222112015Sanholt 223182080Srnolandint radeon_mem_alloc(struct drm_device *dev, void *data, struct drm_file *file_priv) 224112015Sanholt{ 225112015Sanholt drm_radeon_private_t *dev_priv = dev->dev_private; 226182080Srnoland drm_radeon_mem_alloc_t *alloc = data; 227112015Sanholt struct mem_block *block, **heap; 228112015Sanholt 229145132Sanholt if (!dev_priv) { 230182080Srnoland DRM_ERROR("called with no initialization\n"); 231182080Srnoland return -EINVAL; 232112015Sanholt } 233112015Sanholt 234182080Srnoland heap = get_heap(dev_priv, alloc->region); 235112015Sanholt if (!heap || !*heap) 236182080Srnoland return -EFAULT; 237145132Sanholt 238112015Sanholt /* Make things easier on ourselves: all allocations at least 239112015Sanholt * 4k aligned. 240112015Sanholt */ 241182080Srnoland if (alloc->alignment < 12) 242182080Srnoland alloc->alignment = 12; 243112015Sanholt 244182080Srnoland block = alloc_block(*heap, alloc->size, alloc->alignment, file_priv); 245112015Sanholt 246145132Sanholt if (!block) 247182080Srnoland return -ENOMEM; 248112015Sanholt 249182080Srnoland if (DRM_COPY_TO_USER(alloc->region_offset, &block->start, 250182080Srnoland sizeof(int))) { 251145132Sanholt DRM_ERROR("copy_to_user\n"); 252182080Srnoland return -EFAULT; 253112015Sanholt } 254145132Sanholt 255112015Sanholt return 0; 256112015Sanholt} 257112015Sanholt 258182080Srnolandint radeon_mem_free(struct drm_device *dev, void *data, struct drm_file *file_priv) 259112015Sanholt{ 260112015Sanholt drm_radeon_private_t *dev_priv = dev->dev_private; 261182080Srnoland drm_radeon_mem_free_t *memfree = data; 262112015Sanholt struct mem_block *block, **heap; 263112015Sanholt 264145132Sanholt if (!dev_priv) { 265182080Srnoland DRM_ERROR("called with no initialization\n"); 266182080Srnoland return -EINVAL; 267112015Sanholt } 268112015Sanholt 269182080Srnoland heap = get_heap(dev_priv, memfree->region); 270112015Sanholt if (!heap || !*heap) 271182080Srnoland return -EFAULT; 272145132Sanholt 273182080Srnoland block = find_block(*heap, memfree->region_offset); 274112015Sanholt if (!block) 275182080Srnoland return -EFAULT; 276112015Sanholt 277182080Srnoland if (block->file_priv != file_priv) 278182080Srnoland return -EPERM; 279112015Sanholt 280145132Sanholt free_block(block); 281112015Sanholt return 0; 282112015Sanholt} 283112015Sanholt 284182080Srnolandint radeon_mem_init_heap(struct drm_device *dev, void *data, struct drm_file *file_priv) 285112015Sanholt{ 286112015Sanholt drm_radeon_private_t *dev_priv = dev->dev_private; 287182080Srnoland drm_radeon_mem_init_heap_t *initheap = data; 288112015Sanholt struct mem_block **heap; 289112015Sanholt 290145132Sanholt if (!dev_priv) { 291182080Srnoland DRM_ERROR("called with no initialization\n"); 292182080Srnoland return -EINVAL; 293112015Sanholt } 294112015Sanholt 295182080Srnoland heap = get_heap(dev_priv, initheap->region); 296145132Sanholt if (!heap) 297182080Srnoland return -EFAULT; 298145132Sanholt 299112015Sanholt if (*heap) { 300112015Sanholt DRM_ERROR("heap already initialized?"); 301182080Srnoland return -EFAULT; 302112015Sanholt } 303145132Sanholt 304182080Srnoland return init_heap(heap, initheap->start, initheap->size); 305112015Sanholt} 306