1 /************************************************************************** 2 * 3 * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 24 * USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 * 27 **************************************************************************/ 28 29 /* 30 * Authors: 31 * Thomas Hellström <thomas-at-tungstengraphics-dot-com> 32 */ 33 34 #include <drm/drmP.h> 35 #include <drm/sis_drm.h> 36 #include "sis_drv.h" 37 38 #include <video/sisfb.h> 39 40 #define VIDEO_TYPE 0 41 #define AGP_TYPE 1 42 43 44 struct sis_memblock { 45 struct drm_mm_node mm_node; 46 struct sis_memreq req; 47 struct list_head owner_list; 48 }; 49 50 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE) 51 /* fb management via fb device */ 52 53 #define SIS_MM_ALIGN_SHIFT 0 54 #define SIS_MM_ALIGN_MASK 0 55 56 #else /* CONFIG_FB_SIS[_MODULE] */ 57 58 #define SIS_MM_ALIGN_SHIFT 4 59 #define SIS_MM_ALIGN_MASK ((1 << SIS_MM_ALIGN_SHIFT) - 1) 60 61 #endif /* CONFIG_FB_SIS[_MODULE] */ 62 63 static int sis_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv) 64 { 65 drm_sis_private_t *dev_priv = dev->dev_private; 66 drm_sis_fb_t *fb = data; 67 68 mutex_lock(&dev->struct_mutex); 69 /* Unconditionally init the drm_mm, even though we don't use it when the 70 * fb sis driver is available - make cleanup easier. */ 71 drm_mm_init(&dev_priv->vram_mm, 0, fb->size >> SIS_MM_ALIGN_SHIFT); 72 73 dev_priv->vram_initialized = 1; 74 dev_priv->vram_offset = fb->offset; 75 76 mutex_unlock(&dev->struct_mutex); 77 DRM_DEBUG("offset = %lu, size = %lu\n", fb->offset, fb->size); 78 79 return 0; 80 } 81 82 static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file, 83 void *data, int pool) 84 { 85 drm_sis_private_t *dev_priv = dev->dev_private; 86 drm_sis_mem_t *mem = data; 87 int retval = 0, user_key; 88 struct sis_memblock *item; 89 struct sis_file_private *file_priv = file->driver_priv; 90 unsigned long offset; 91 92 mutex_lock(&dev->struct_mutex); 93 94 if (0 == ((pool == 0) ? dev_priv->vram_initialized : 95 dev_priv->agp_initialized)) { 96 DRM_ERROR 97 ("Attempt to allocate from uninitialized memory manager.\n"); 98 mutex_unlock(&dev->struct_mutex); 99 return -EINVAL; 100 } 101 102 item = kzalloc(sizeof(*item), GFP_KERNEL); 103 if (!item) { 104 retval = -ENOMEM; 105 goto fail_alloc; 106 } 107 108 mem->size = (mem->size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT; 109 if (pool == AGP_TYPE) { 110 retval = drm_mm_insert_node(&dev_priv->agp_mm, 111 &item->mm_node, 112 mem->size, 0); 113 offset = item->mm_node.start; 114 } else { 115 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE) 116 item->req.size = mem->size; 117 sis_malloc(&item->req); 118 if (item->req.size == 0) 119 retval = -ENOMEM; 120 offset = item->req.offset; 121 #else 122 retval = drm_mm_insert_node(&dev_priv->vram_mm, 123 &item->mm_node, 124 mem->size, 0); 125 offset = item->mm_node.start; 126 #endif 127 } 128 if (retval) 129 goto fail_alloc; 130 131 again: 132 if (idr_pre_get(&dev_priv->object_idr, GFP_KERNEL) == 0) { 133 retval = -ENOMEM; 134 goto fail_idr; 135 } 136 137 retval = idr_get_new_above(&dev_priv->object_idr, item, 1, &user_key); 138 if (retval == -EAGAIN) 139 goto again; 140 if (retval) 141 goto fail_idr; 142 143 list_add(&item->owner_list, &file_priv->obj_list); 144 mutex_unlock(&dev->struct_mutex); 145 146 mem->offset = ((pool == 0) ? 147 dev_priv->vram_offset : dev_priv->agp_offset) + 148 (offset << SIS_MM_ALIGN_SHIFT); 149 mem->free = user_key; 150 mem->size = mem->size << SIS_MM_ALIGN_SHIFT; 151 152 return 0; 153 154 fail_idr: 155 drm_mm_remove_node(&item->mm_node); 156 fail_alloc: 157 kfree(item); 158 mutex_unlock(&dev->struct_mutex); 159 160 mem->offset = 0; 161 mem->size = 0; 162 mem->free = 0; 163 164 DRM_DEBUG("alloc %d, size = %ld, offset = %ld\n", pool, mem->size, 165 mem->offset); 166 167 return retval; 168 } 169 170 static int sis_drm_free(struct drm_device *dev, void *data, struct drm_file *file_priv) 171 { 172 drm_sis_private_t *dev_priv = dev->dev_private; 173 drm_sis_mem_t *mem = data; 174 struct sis_memblock *obj; 175 176 mutex_lock(&dev->struct_mutex); 177 obj = idr_find(&dev_priv->object_idr, mem->free); 178 if (obj == NULL) { 179 mutex_unlock(&dev->struct_mutex); 180 return -EINVAL; 181 } 182 183 idr_remove(&dev_priv->object_idr, mem->free); 184 list_del(&obj->owner_list); 185 if (drm_mm_node_allocated(&obj->mm_node)) 186 drm_mm_remove_node(&obj->mm_node); 187 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE) 188 else 189 sis_free(obj->req.offset); 190 #endif 191 kfree(obj); 192 mutex_unlock(&dev->struct_mutex); 193 DRM_DEBUG("free = 0x%lx\n", mem->free); 194 195 return 0; 196 } 197 198 static int sis_fb_alloc(struct drm_device *dev, void *data, 199 struct drm_file *file_priv) 200 { 201 return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE); 202 } 203 204 static int sis_ioctl_agp_init(struct drm_device *dev, void *data, 205 struct drm_file *file_priv) 206 { 207 drm_sis_private_t *dev_priv = dev->dev_private; 208 drm_sis_agp_t *agp = data; 209 dev_priv = dev->dev_private; 210 211 mutex_lock(&dev->struct_mutex); 212 drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> SIS_MM_ALIGN_SHIFT); 213 214 dev_priv->agp_initialized = 1; 215 dev_priv->agp_offset = agp->offset; 216 mutex_unlock(&dev->struct_mutex); 217 218 DRM_DEBUG("offset = %lu, size = %lu\n", agp->offset, agp->size); 219 return 0; 220 } 221 222 static int sis_ioctl_agp_alloc(struct drm_device *dev, void *data, 223 struct drm_file *file_priv) 224 { 225 226 return sis_drm_alloc(dev, file_priv, data, AGP_TYPE); 227 } 228 229 static drm_local_map_t *sis_reg_init(struct drm_device *dev) 230 { 231 struct drm_map_list *entry; 232 drm_local_map_t *map; 233 234 list_for_each_entry(entry, &dev->maplist, head) { 235 map = entry->map; 236 if (!map) 237 continue; 238 if (map->type == _DRM_REGISTERS) 239 return map; 240 } 241 return NULL; 242 } 243 244 int sis_idle(struct drm_device *dev) 245 { 246 drm_sis_private_t *dev_priv = dev->dev_private; 247 uint32_t idle_reg; 248 unsigned long end; 249 int i; 250 251 if (dev_priv->idle_fault) 252 return 0; 253 254 if (dev_priv->mmio == NULL) { 255 dev_priv->mmio = sis_reg_init(dev); 256 if (dev_priv->mmio == NULL) { 257 DRM_ERROR("Could not find register map.\n"); 258 return 0; 259 } 260 } 261 262 /* 263 * Implement a device switch here if needed 264 */ 265 266 if (dev_priv->chipset != SIS_CHIP_315) 267 return 0; 268 269 /* 270 * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here 271 * because its polling frequency is too low. 272 */ 273 274 end = jiffies + (DRM_HZ * 3); 275 276 for (i = 0; i < 4; ++i) { 277 do { 278 idle_reg = SIS_READ(0x85cc); 279 } while (!time_after_eq(jiffies, end) && 280 ((idle_reg & 0x80000000) != 0x80000000)); 281 } 282 283 if (time_after_eq(jiffies, end)) { 284 DRM_ERROR("Graphics engine idle timeout. " 285 "Disabling idle check\n"); 286 dev_priv->idle_fault = 1; 287 } 288 289 /* 290 * The caller never sees an error code. It gets trapped 291 * in libdrm. 292 */ 293 294 return 0; 295 } 296 297 298 void sis_lastclose(struct drm_device *dev) 299 { 300 drm_sis_private_t *dev_priv = dev->dev_private; 301 302 if (!dev_priv) 303 return; 304 305 mutex_lock(&dev->struct_mutex); 306 if (dev_priv->vram_initialized) { 307 drm_mm_takedown(&dev_priv->vram_mm); 308 dev_priv->vram_initialized = 0; 309 } 310 if (dev_priv->agp_initialized) { 311 drm_mm_takedown(&dev_priv->agp_mm); 312 dev_priv->agp_initialized = 0; 313 } 314 dev_priv->mmio = NULL; 315 mutex_unlock(&dev->struct_mutex); 316 } 317 318 void sis_reclaim_buffers_locked(struct drm_device *dev, 319 struct drm_file *file) 320 { 321 struct sis_file_private *file_priv = file->driver_priv; 322 struct sis_memblock *entry, *next; 323 324 if (!(file->minor->master && file->master->lock.hw_lock)) 325 return; 326 327 drm_idlelock_take(&file->master->lock); 328 329 mutex_lock(&dev->struct_mutex); 330 if (list_empty(&file_priv->obj_list)) { 331 mutex_unlock(&dev->struct_mutex); 332 drm_idlelock_release(&file->master->lock); 333 334 return; 335 } 336 337 sis_idle(dev); 338 339 340 list_for_each_entry_safe(entry, next, &file_priv->obj_list, 341 owner_list) { 342 list_del(&entry->owner_list); 343 if (drm_mm_node_allocated(&entry->mm_node)) 344 drm_mm_remove_node(&entry->mm_node); 345 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE) 346 else 347 sis_free(entry->req.offset); 348 #endif 349 kfree(entry); 350 } 351 mutex_unlock(&dev->struct_mutex); 352 353 drm_idlelock_release(&file->master->lock); 354 355 return; 356 } 357 358 struct drm_ioctl_desc sis_ioctls[] = { 359 DRM_IOCTL_DEF_DRV(SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH), 360 DRM_IOCTL_DEF_DRV(SIS_FB_FREE, sis_drm_free, DRM_AUTH), 361 DRM_IOCTL_DEF_DRV(SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY), 362 DRM_IOCTL_DEF_DRV(SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH), 363 DRM_IOCTL_DEF_DRV(SIS_AGP_FREE, sis_drm_free, DRM_AUTH), 364 DRM_IOCTL_DEF_DRV(SIS_FB_INIT, sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY), 365 }; 366 367 int sis_max_ioctl = DRM_ARRAY_SIZE(sis_ioctls); 368