#ifndef _I810_DRM_H_ #define _I810_DRM_H_ /* WARNING: These defines must be the same as what the Xserver uses. * if you change them, you must change the defines in the Xserver. */ #ifndef _I810_DEFINES_ #define _I810_DEFINES_ #define I810_DMA_BUF_ORDER 12 #define I810_DMA_BUF_SZ (1<204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 
/**************************************************************************
 *
 * Copyright 2006 Tungsten Graphics, Inc., Bismarck., ND., USA.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 *
 **************************************************************************/
/*
 * Simple memory manager interface that keeps track on allocate regions on a
 * per "owner" basis. All regions associated with an "owner" can be released
 * with a simple call. Typically if the "owner" exists. The owner is any
 * "unsigned long" identifier. Can typically be a pointer to a file private
 * struct or a context identifier.
 *
 * Authors:
 * Thomas Hellström <thomas-at-tungstengraphics-dot-com>
 */

#include "drm_sman.h"

struct drm_owner_item {
	struct drm_hash_item owner_hash;
	struct list_head sman_list;
	struct list_head mem_blocks;
};

void drm_sman_takedown(struct drm_sman * sman)
{
	drm_ht_remove(&sman->user_hash_tab);
	drm_ht_remove(&sman->owner_hash_tab);
	if (sman->mm)
		drm_free(sman->mm, sman->num_managers * sizeof(*sman->mm),
			 DRM_MEM_MM);
}

EXPORT_SYMBOL(drm_sman_takedown);

int
drm_sman_init(struct drm_sman * sman, unsigned int num_managers,
	      unsigned int user_order, unsigned int owner_order)
{
	int ret = 0;

	sman->mm = (struct drm_sman_mm *) drm_calloc(num_managers, sizeof(*sman->mm),
						DRM_MEM_MM);
	if (!sman->mm) {
		ret = -ENOMEM;
		goto out;
	}
	sman->num_managers = num_managers;
	INIT_LIST_HEAD(&sman->owner_items);
	ret = drm_ht_create(&sman->owner_hash_tab, owner_order);
	if (ret)
		goto out1;
	ret = drm_ht_create(&sman->user_hash_tab, user_order);
	if (!ret)
		goto out;

	drm_ht_remove(&sman->owner_hash_tab);
out1:
	drm_free(sman->mm, num_managers * sizeof(*sman->mm), DRM_MEM_MM);
out:
	return ret;
}

EXPORT_SYMBOL(drm_sman_init);

static void *drm_sman_mm_allocate(void *private, unsigned long size,
				  unsigned alignment)
{
	struct drm_mm *mm = (struct drm_mm *) private;
	struct drm_mm_node *tmp;

	tmp = drm_mm_search_free(mm, size, alignment, 1);
	if (!tmp) {
		return NULL;
	}
	tmp = drm_mm_get_block(tmp, size, alignment);
	return tmp;
}

static void drm_sman_mm_free(void *private, void *ref)
{
	struct drm_mm_node *node = (struct drm_mm_node *) ref;

	drm_mm_put_block(node);
}

static void drm_sman_mm_destroy(void *private)
{
	struct drm_mm *mm = (struct drm_mm *) private;
	drm_mm_takedown(mm);
	drm_free(mm, sizeof(*mm), DRM_MEM_MM);
}

static unsigned long drm_sman_mm_offset(void *private, void *ref)
{
	struct drm_mm_node *node = (struct drm_mm_node *) ref;
	return node->start;
}

int
drm_sman_set_range(struct drm_sman * sman, unsigned int manager,
		   unsigned long start, unsigned long size)
{
	struct drm_sman_mm *sman_mm;
	struct drm_mm *mm;
	int ret;

	BUG_ON(manager >= sman->num_managers);

	sman_mm = &sman->mm[manager];
	mm = drm_calloc(1, sizeof(*mm), DRM_MEM_MM);
	if (!mm) {
		return -ENOMEM;
	}
	sman_mm->private = mm;
	ret = drm_mm_init(mm, start, size);

	if (ret) {
		drm_free(mm, sizeof(*mm), DRM_MEM_MM);
		return ret;
	}

	sman_mm->allocate = drm_sman_mm_allocate;
	sman_mm->free = drm_sman_mm_free;
	sman_mm->destroy = drm_sman_mm_destroy;
	sman_mm->offset = drm_sman_mm_offset;

	return 0;
}

EXPORT_SYMBOL(drm_sman_set_range);

int
drm_sman_set_manager(struct drm_sman * sman, unsigned int manager,
		     struct drm_sman_mm * allocator)
{
	BUG_ON(manager >= sman->num_managers);
	sman->mm[manager] = *allocator;

	return 0;
}
EXPORT_SYMBOL(drm_sman_set_manager);

static struct drm_owner_item *drm_sman_get_owner_item(struct drm_sman * sman,
						 unsigned long owner)
{
	int ret;
	struct drm_hash_item *owner_hash_item;
	struct drm_owner_item *owner_item;

	ret = drm_ht_find_item(&sman->owner_hash_tab, owner, &owner_hash_item);
	if (!ret) {
		return drm_hash_entry(owner_hash_item, struct drm_owner_item,
				      owner_hash);
	}

	owner_item = drm_calloc(1, sizeof(*owner_item), DRM_MEM_MM);
	if (!owner_item)
		goto out;

	INIT_LIST_HEAD(&owner_item->mem_blocks);
	owner_item->owner_hash.key = owner;
	if (drm_ht_insert_item(&sman->owner_hash_tab, &owner_item->owner_hash))
		goto out1;

	list_add_tail(&owner_item->sman_list, &sman->owner_items);
	return owner_item;

out1:
	drm_free(owner_item, sizeof(*owner_item), DRM_MEM_MM);
out:
	return NULL;
}

struct drm_memblock_item *drm_sman_alloc(struct drm_sman *sman, unsigned int manager,
				    unsigned long size, unsigned alignment,
				    unsigned long owner)
{
	void *tmp;
	struct drm_sman_mm *sman_mm;
	struct drm_owner_item *owner_item;
	struct drm_memblock_item *memblock;

	BUG_ON(manager >= sman->num_managers);

	sman_mm = &sman->mm[manager];
	tmp = sman_mm->allocate(sman_mm->private, size, alignment);

	if (!tmp) {
		return NULL;
	}

	memblock = drm_calloc(1, sizeof(*memblock), DRM_MEM_MM);

	if (!memblock)
		goto out;

	memblock->mm_info = tmp;
	memblock->mm = sman_mm;
	memblock->sman = sman;

	if (drm_ht_just_insert_please
	    (&sman->user_hash_tab, &memblock->user_hash,
	     (unsigned long)memblock, 32, 0, 0))
		goto out1;

	owner_item = drm_sman_get_owner_item(sman, owner);
	if (!owner_item)
		goto out2;

	list_add_tail(&memblock->owner_list, &owner_item->mem_blocks);

	return memblock;

out2:
	drm_ht_remove_item(&sman->user_hash_tab, &memblock->user_hash);
out1:
	drm_free(memblock, sizeof(*memblock), DRM_MEM_MM);
out:
	sman_mm->free(sman_mm->private, tmp);

	return NULL;
}

EXPORT_SYMBOL(drm_sman_alloc);

static void drm_sman_free(struct drm_memblock_item *item)
{
	struct drm_sman *sman = item->sman;

	list_del(&item->owner_list);
	drm_ht_remove_item(&sman->user_hash_tab, &item->user_hash);
	item->mm->free(item->mm->private, item->mm_info);
	drm_free(item, sizeof(*item), DRM_MEM_MM);
}

int drm_sman_free_key(struct drm_sman *sman, unsigned int key)
{
	struct drm_hash_item *hash_item;
	struct drm_memblock_item *memblock_item;

	if (drm_ht_find_item(&sman->user_hash_tab, key, &hash_item))
		return -EINVAL;

	memblock_item = drm_hash_entry(hash_item, struct drm_memblock_item, user_hash);
	drm_sman_free(memblock_item);
	return 0;
}

EXPORT_SYMBOL(drm_sman_free_key);

static void drm_sman_remove_owner(struct drm_sman *sman,
				  struct drm_owner_item *owner_item)
{
	list_del(&owner_item->sman_list);
	drm_ht_remove_item(&sman->owner_hash_tab, &owner_item->owner_hash);
	drm_free(owner_item, sizeof(*owner_item), DRM_MEM_MM);
}

int drm_sman_owner_clean(struct drm_sman *sman, unsigned long owner)
{

	struct drm_hash_item *hash_item;
	struct drm_owner_item *owner_item;

	if (drm_ht_find_item(&sman->owner_hash_tab, owner, &hash_item)) {
		return -1;
	}

	owner_item = drm_hash_entry(hash_item, struct drm_owner_item, owner_hash);
	if (owner_item->mem_blocks.next == &owner_item->mem_blocks) {
		drm_sman_remove_owner(sman, owner_item);
		return -1;
	}

	return 0;
}

EXPORT_SYMBOL(drm_sman_owner_clean);

static void drm_sman_do_owner_cleanup(struct drm_sman *sman,
				      struct drm_owner_item *owner_item)
{
	struct drm_memblock_item *entry, *next;