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 44struct 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 63static 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 82static 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 DRM_MM_SEARCH_DEFAULT); 114 offset = item->mm_node.start; 115 } else { 116#if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE) 117 item->req.size = mem->size; 118 sis_malloc(&item->req); 119 if (item->req.size == 0) 120 retval = -ENOMEM; 121 offset = item->req.offset; 122#else 123 retval = drm_mm_insert_node(&dev_priv->vram_mm, 124 &item->mm_node, 125 mem->size, 0, 126 DRM_MM_SEARCH_DEFAULT); 127 offset = item->mm_node.start; 128#endif 129 } 130 if (retval) 131 goto fail_alloc; 132 133 retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL); 134 if (retval < 0) 135 goto fail_idr; 136 user_key = retval; 137 138 list_add(&item->owner_list, &file_priv->obj_list); 139 mutex_unlock(&dev->struct_mutex); 140 141 mem->offset = ((pool == 0) ? 142 dev_priv->vram_offset : dev_priv->agp_offset) + 143 (offset << SIS_MM_ALIGN_SHIFT); 144 mem->free = user_key; 145 mem->size = mem->size << SIS_MM_ALIGN_SHIFT; 146 147 return 0; 148 149fail_idr: 150 drm_mm_remove_node(&item->mm_node); 151fail_alloc: 152 kfree(item); 153 mutex_unlock(&dev->struct_mutex); 154 155 mem->offset = 0; 156 mem->size = 0; 157 mem->free = 0; 158 159 DRM_DEBUG("alloc %d, size = %ld, offset = %ld\n", pool, mem->size, 160 mem->offset); 161 162 return retval; 163} 164 165static int sis_drm_free(struct drm_device *dev, void *data, struct drm_file *file_priv) 166{ 167 drm_sis_private_t *dev_priv = dev->dev_private; 168 drm_sis_mem_t *mem = data; 169 struct sis_memblock *obj; 170 171 mutex_lock(&dev->struct_mutex); 172 obj = idr_find(&dev_priv->object_idr, mem->free); 173 if (obj == NULL) { 174 mutex_unlock(&dev->struct_mutex); 175 return -EINVAL; 176 } 177 178 idr_remove(&dev_priv->object_idr, mem->free); 179 list_del(&obj->owner_list); 180 if (drm_mm_node_allocated(&obj->mm_node)) 181 drm_mm_remove_node(&obj->mm_node); 182#if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE) 183 else 184 sis_free(obj->req.offset); 185#endif 186 kfree(obj); 187 mutex_unlock(&dev->struct_mutex); 188 DRM_DEBUG("free = 0x%lx\n", mem->free); 189 190 return 0; 191} 192 193static int sis_fb_alloc(struct drm_device *dev, void *data, 194 struct drm_file *file_priv) 195{ 196 return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE); 197} 198 199static int sis_ioctl_agp_init(struct drm_device *dev, void *data, 200 struct drm_file *file_priv) 201{ 202 drm_sis_private_t *dev_priv = dev->dev_private; 203 drm_sis_agp_t *agp = data; 204 dev_priv = dev->dev_private; 205 206 mutex_lock(&dev->struct_mutex); 207 drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> SIS_MM_ALIGN_SHIFT); 208 209 dev_priv->agp_initialized = 1; 210 dev_priv->agp_offset = agp->offset; 211 mutex_unlock(&dev->struct_mutex); 212 213 DRM_DEBUG("offset = %lu, size = %lu\n", agp->offset, agp->size); 214 return 0; 215} 216 217static int sis_ioctl_agp_alloc(struct drm_device *dev, void *data, 218 struct drm_file *file_priv) 219{ 220 221 return sis_drm_alloc(dev, file_priv, data, AGP_TYPE); 222} 223 224static drm_local_map_t *sis_reg_init(struct drm_device *dev) 225{ 226 struct drm_map_list *entry; 227 drm_local_map_t *map; 228 229 list_for_each_entry(entry, &dev->maplist, head) { 230 map = entry->map; 231 if (!map) 232 continue; 233 if (map->type == _DRM_REGISTERS) 234 return map; 235 } 236 return NULL; 237} 238 239int sis_idle(struct drm_device *dev) 240{ 241 drm_sis_private_t *dev_priv = dev->dev_private; 242 uint32_t idle_reg; 243 unsigned long end; 244 int i; 245 246 if (dev_priv->idle_fault) 247 return 0; 248 249 if (dev_priv->mmio == NULL) { 250 dev_priv->mmio = sis_reg_init(dev); 251 if (dev_priv->mmio == NULL) { 252 DRM_ERROR("Could not find register map.\n"); 253 return 0; 254 } 255 } 256 257 /* 258 * Implement a device switch here if needed 259 */ 260 261 if (dev_priv->chipset != SIS_CHIP_315) 262 return 0; 263 264 /* 265 * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here 266 * because its polling frequency is too low. 267 */ 268 269 end = jiffies + (HZ * 3); 270 271 for (i = 0; i < 4; ++i) { 272 do { 273 idle_reg = SIS_READ(0x85cc); 274 } while (!time_after_eq(jiffies, end) && 275 ((idle_reg & 0x80000000) != 0x80000000)); 276 } 277 278 if (time_after_eq(jiffies, end)) { 279 DRM_ERROR("Graphics engine idle timeout. " 280 "Disabling idle check\n"); 281 dev_priv->idle_fault = 1; 282 } 283 284 /* 285 * The caller never sees an error code. It gets trapped 286 * in libdrm. 287 */ 288 289 return 0; 290} 291 292 293void sis_lastclose(struct drm_device *dev) 294{ 295 drm_sis_private_t *dev_priv = dev->dev_private; 296 297 if (!dev_priv) 298 return; 299 300 mutex_lock(&dev->struct_mutex); 301 if (dev_priv->vram_initialized) { 302 drm_mm_takedown(&dev_priv->vram_mm); 303 dev_priv->vram_initialized = 0; 304 } 305 if (dev_priv->agp_initialized) { 306 drm_mm_takedown(&dev_priv->agp_mm); 307 dev_priv->agp_initialized = 0; 308 } 309 dev_priv->mmio = NULL; 310 mutex_unlock(&dev->struct_mutex); 311} 312 313void sis_reclaim_buffers_locked(struct drm_device *dev, 314 struct drm_file *file) 315{ 316 struct sis_file_private *file_priv = file->driver_priv; 317 struct sis_memblock *entry, *next; 318 319 if (!(file->minor->master && file->master->lock.hw_lock)) 320 return; 321 322 drm_legacy_idlelock_take(&file->master->lock); 323 324 mutex_lock(&dev->struct_mutex); 325 if (list_empty(&file_priv->obj_list)) { 326 mutex_unlock(&dev->struct_mutex); 327 drm_legacy_idlelock_release(&file->master->lock); 328 329 return; 330 } 331 332 sis_idle(dev); 333 334 335 list_for_each_entry_safe(entry, next, &file_priv->obj_list, 336 owner_list) { 337 list_del(&entry->owner_list); 338 if (drm_mm_node_allocated(&entry->mm_node)) 339 drm_mm_remove_node(&entry->mm_node); 340#if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE) 341 else 342 sis_free(entry->req.offset); 343#endif 344 kfree(entry); 345 } 346 mutex_unlock(&dev->struct_mutex); 347 348 drm_legacy_idlelock_release(&file->master->lock); 349 350 return; 351} 352 353const struct drm_ioctl_desc sis_ioctls[] = { 354 DRM_IOCTL_DEF_DRV(SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH), 355 DRM_IOCTL_DEF_DRV(SIS_FB_FREE, sis_drm_free, DRM_AUTH), 356 DRM_IOCTL_DEF_DRV(SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY), 357 DRM_IOCTL_DEF_DRV(SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH), 358 DRM_IOCTL_DEF_DRV(SIS_AGP_FREE, sis_drm_free, DRM_AUTH), 359 DRM_IOCTL_DEF_DRV(SIS_FB_INIT, sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY), 360}; 361 362int sis_max_ioctl = ARRAY_SIZE(sis_ioctls); 363