Lines Matching +full:dma +full:- +full:pool
1 // SPDX-License-Identifier: GPL-2.0-only
5 * kmalloc/kfree interface. Uses for this includes on-device special
16 * available. If new memory is added to the pool a lock has to be
21 * On architectures that don't have NMI-safe cmpxchg implementation,
26 * Copyright 2005 (C) Jes Sorensen <jes@trained-monkey.org>
42 return chunk->end_addr - chunk->start_addr + 1; in chunk_size()
52 return -EBUSY; in set_bits_ll()
66 return -EBUSY; in clear_bits_ll()
74 * bitmap_set_ll - set the specified number of bits at the specified position
79 * Set @nr bits start from @start in @map lock-lessly. Several users
89 int bits_to_set = BITS_PER_LONG - (start % BITS_PER_LONG); in bitmap_set_ll()
95 nr -= bits_to_set; in bitmap_set_ll()
110 * bitmap_clear_ll - clear the specified number of bits at the specified position
115 * Clear @nr bits start from @start in @map lock-lessly. Several users
125 int bits_to_clear = BITS_PER_LONG - (start % BITS_PER_LONG); in bitmap_clear_ll()
131 nr -= bits_to_clear; in bitmap_clear_ll()
146 * gen_pool_create - create a new special memory pool
148 * @nid: node id of the node the pool structure should be allocated on, or -1
150 * Create a new special memory pool that can be used to manage special purpose
155 struct gen_pool *pool; in gen_pool_create() local
157 pool = kmalloc_node(sizeof(struct gen_pool), GFP_KERNEL, nid); in gen_pool_create()
158 if (pool != NULL) { in gen_pool_create()
159 spin_lock_init(&pool->lock); in gen_pool_create()
160 INIT_LIST_HEAD(&pool->chunks); in gen_pool_create()
161 pool->min_alloc_order = min_alloc_order; in gen_pool_create()
162 pool->algo = gen_pool_first_fit; in gen_pool_create()
163 pool->data = NULL; in gen_pool_create()
164 pool->name = NULL; in gen_pool_create()
166 return pool; in gen_pool_create()
171 * gen_pool_add_owner- add a new chunk of special memory to the pool
172 * @pool: pool to add new memory chunk to
173 * @virt: virtual starting address of memory chunk to add to pool
174 * @phys: physical starting address of memory chunk to add to pool
175 * @size: size in bytes of the memory chunk to add to pool
177 * allocated on, or -1
180 * Add a new chunk of special memory to the specified pool.
182 * Returns 0 on success or a -ve errno on failure.
184 int gen_pool_add_owner(struct gen_pool *pool, unsigned long virt, phys_addr_t phys, in gen_pool_add_owner() argument
188 unsigned long nbits = size >> pool->min_alloc_order; in gen_pool_add_owner()
194 return -ENOMEM; in gen_pool_add_owner()
196 chunk->phys_addr = phys; in gen_pool_add_owner()
197 chunk->start_addr = virt; in gen_pool_add_owner()
198 chunk->end_addr = virt + size - 1; in gen_pool_add_owner()
199 chunk->owner = owner; in gen_pool_add_owner()
200 atomic_long_set(&chunk->avail, size); in gen_pool_add_owner()
202 spin_lock(&pool->lock); in gen_pool_add_owner()
203 list_add_rcu(&chunk->next_chunk, &pool->chunks); in gen_pool_add_owner()
204 spin_unlock(&pool->lock); in gen_pool_add_owner()
211 * gen_pool_virt_to_phys - return the physical address of memory
212 * @pool: pool to allocate from
215 * Returns the physical address on success, or -1 on error.
217 phys_addr_t gen_pool_virt_to_phys(struct gen_pool *pool, unsigned long addr) in gen_pool_virt_to_phys() argument
220 phys_addr_t paddr = -1; in gen_pool_virt_to_phys()
223 list_for_each_entry_rcu(chunk, &pool->chunks, next_chunk) { in gen_pool_virt_to_phys()
224 if (addr >= chunk->start_addr && addr <= chunk->end_addr) { in gen_pool_virt_to_phys()
225 paddr = chunk->phys_addr + (addr - chunk->start_addr); in gen_pool_virt_to_phys()
236 * gen_pool_destroy - destroy a special memory pool
237 * @pool: pool to destroy
239 * Destroy the specified special memory pool. Verifies that there are no
242 void gen_pool_destroy(struct gen_pool *pool) in gen_pool_destroy() argument
246 int order = pool->min_alloc_order; in gen_pool_destroy()
249 list_for_each_safe(_chunk, _next_chunk, &pool->chunks) { in gen_pool_destroy()
251 list_del(&chunk->next_chunk); in gen_pool_destroy()
254 bit = find_first_bit(chunk->bits, end_bit); in gen_pool_destroy()
259 kfree_const(pool->name); in gen_pool_destroy()
260 kfree(pool); in gen_pool_destroy()
265 * gen_pool_alloc_algo_owner - allocate special memory from the pool
266 * @pool: pool to allocate from
267 * @size: number of bytes to allocate from the pool
272 * Allocate the requested number of bytes from the specified pool.
273 * Uses the pool allocation function (with first-fit algorithm by default).
275 * NMI-safe cmpxchg implementation.
277 unsigned long gen_pool_alloc_algo_owner(struct gen_pool *pool, size_t size, in gen_pool_alloc_algo_owner() argument
282 int order = pool->min_alloc_order; in gen_pool_alloc_algo_owner()
295 nbits = (size + (1UL << order) - 1) >> order; in gen_pool_alloc_algo_owner()
297 list_for_each_entry_rcu(chunk, &pool->chunks, next_chunk) { in gen_pool_alloc_algo_owner()
298 if (size > atomic_long_read(&chunk->avail)) in gen_pool_alloc_algo_owner()
304 start_bit = algo(chunk->bits, end_bit, start_bit, in gen_pool_alloc_algo_owner()
305 nbits, data, pool, chunk->start_addr); in gen_pool_alloc_algo_owner()
308 remain = bitmap_set_ll(chunk->bits, start_bit, nbits); in gen_pool_alloc_algo_owner()
310 remain = bitmap_clear_ll(chunk->bits, start_bit, in gen_pool_alloc_algo_owner()
311 nbits - remain); in gen_pool_alloc_algo_owner()
316 addr = chunk->start_addr + ((unsigned long)start_bit << order); in gen_pool_alloc_algo_owner()
318 atomic_long_sub(size, &chunk->avail); in gen_pool_alloc_algo_owner()
320 *owner = chunk->owner; in gen_pool_alloc_algo_owner()
329 * gen_pool_dma_alloc - allocate special memory from the pool for DMA usage
330 * @pool: pool to allocate from
331 * @size: number of bytes to allocate from the pool
332 * @dma: dma-view physical address return value. Use %NULL if unneeded.
334 * Allocate the requested number of bytes from the specified pool.
335 * Uses the pool allocation function (with first-fit algorithm by default).
337 * NMI-safe cmpxchg implementation.
341 void *gen_pool_dma_alloc(struct gen_pool *pool, size_t size, dma_addr_t *dma) in gen_pool_dma_alloc() argument
343 return gen_pool_dma_alloc_algo(pool, size, dma, pool->algo, pool->data); in gen_pool_dma_alloc()
348 * gen_pool_dma_alloc_algo - allocate special memory from the pool for DMA
349 * usage with the given pool algorithm
350 * @pool: pool to allocate from
351 * @size: number of bytes to allocate from the pool
352 * @dma: DMA-view physical address return value. Use %NULL if unneeded.
356 * Allocate the requested number of bytes from the specified pool. Uses the
357 * given pool allocation function. Can not be used in NMI handler on
358 * architectures without NMI-safe cmpxchg implementation.
362 void *gen_pool_dma_alloc_algo(struct gen_pool *pool, size_t size, in gen_pool_dma_alloc_algo() argument
363 dma_addr_t *dma, genpool_algo_t algo, void *data) in gen_pool_dma_alloc_algo() argument
367 if (!pool) in gen_pool_dma_alloc_algo()
370 vaddr = gen_pool_alloc_algo(pool, size, algo, data); in gen_pool_dma_alloc_algo()
374 if (dma) in gen_pool_dma_alloc_algo()
375 *dma = gen_pool_virt_to_phys(pool, vaddr); in gen_pool_dma_alloc_algo()
382 * gen_pool_dma_alloc_align - allocate special memory from the pool for DMA
384 * @pool: pool to allocate from
385 * @size: number of bytes to allocate from the pool
386 * @dma: DMA-view physical address return value. Use %NULL if unneeded.
389 * Allocate the requested number bytes from the specified pool, with the given
391 * without NMI-safe cmpxchg implementation.
395 void *gen_pool_dma_alloc_align(struct gen_pool *pool, size_t size, in gen_pool_dma_alloc_align() argument
396 dma_addr_t *dma, int align) in gen_pool_dma_alloc_align() argument
400 return gen_pool_dma_alloc_algo(pool, size, dma, in gen_pool_dma_alloc_align()
406 * gen_pool_dma_zalloc - allocate special zeroed memory from the pool for
407 * DMA usage
408 * @pool: pool to allocate from
409 * @size: number of bytes to allocate from the pool
410 * @dma: dma-view physical address return value. Use %NULL if unneeded.
412 * Allocate the requested number of zeroed bytes from the specified pool.
413 * Uses the pool allocation function (with first-fit algorithm by default).
415 * NMI-safe cmpxchg implementation.
419 void *gen_pool_dma_zalloc(struct gen_pool *pool, size_t size, dma_addr_t *dma) in gen_pool_dma_zalloc() argument
421 return gen_pool_dma_zalloc_algo(pool, size, dma, pool->algo, pool->data); in gen_pool_dma_zalloc()
426 * gen_pool_dma_zalloc_algo - allocate special zeroed memory from the pool for
427 * DMA usage with the given pool algorithm
428 * @pool: pool to allocate from
429 * @size: number of bytes to allocate from the pool
430 * @dma: DMA-view physical address return value. Use %NULL if unneeded.
434 * Allocate the requested number of zeroed bytes from the specified pool. Uses
435 * the given pool allocation function. Can not be used in NMI handler on
436 * architectures without NMI-safe cmpxchg implementation.
440 void *gen_pool_dma_zalloc_algo(struct gen_pool *pool, size_t size, in gen_pool_dma_zalloc_algo() argument
441 dma_addr_t *dma, genpool_algo_t algo, void *data) in gen_pool_dma_zalloc_algo() argument
443 void *vaddr = gen_pool_dma_alloc_algo(pool, size, dma, algo, data); in gen_pool_dma_zalloc_algo()
453 * gen_pool_dma_zalloc_align - allocate special zeroed memory from the pool for
454 * DMA usage with the given alignment
455 * @pool: pool to allocate from
456 * @size: number of bytes to allocate from the pool
457 * @dma: DMA-view physical address return value. Use %NULL if unneeded.
460 * Allocate the requested number of zeroed bytes from the specified pool,
462 * architectures without NMI-safe cmpxchg implementation.
466 void *gen_pool_dma_zalloc_align(struct gen_pool *pool, size_t size, in gen_pool_dma_zalloc_align() argument
467 dma_addr_t *dma, int align) in gen_pool_dma_zalloc_align() argument
471 return gen_pool_dma_zalloc_algo(pool, size, dma, in gen_pool_dma_zalloc_align()
477 * gen_pool_free_owner - free allocated special memory back to the pool
478 * @pool: pool to free to
479 * @addr: starting address of memory to free back to pool
484 * pool. Can not be used in NMI handler on architectures without
485 * NMI-safe cmpxchg implementation.
487 void gen_pool_free_owner(struct gen_pool *pool, unsigned long addr, size_t size, in gen_pool_free_owner() argument
491 int order = pool->min_alloc_order; in gen_pool_free_owner()
501 nbits = (size + (1UL << order) - 1) >> order; in gen_pool_free_owner()
503 list_for_each_entry_rcu(chunk, &pool->chunks, next_chunk) { in gen_pool_free_owner()
504 if (addr >= chunk->start_addr && addr <= chunk->end_addr) { in gen_pool_free_owner()
505 BUG_ON(addr + size - 1 > chunk->end_addr); in gen_pool_free_owner()
506 start_bit = (addr - chunk->start_addr) >> order; in gen_pool_free_owner()
507 remain = bitmap_clear_ll(chunk->bits, start_bit, nbits); in gen_pool_free_owner()
510 atomic_long_add(size, &chunk->avail); in gen_pool_free_owner()
512 *owner = chunk->owner; in gen_pool_free_owner()
523 * gen_pool_for_each_chunk - call func for every chunk of generic memory pool
524 * @pool: the generic memory pool
528 * Call @func for every chunk of generic memory pool. The @func is
531 void gen_pool_for_each_chunk(struct gen_pool *pool, in gen_pool_for_each_chunk() argument
532 void (*func)(struct gen_pool *pool, struct gen_pool_chunk *chunk, void *data), in gen_pool_for_each_chunk() argument
538 list_for_each_entry_rcu(chunk, &(pool)->chunks, next_chunk) in gen_pool_for_each_chunk()
539 func(pool, chunk, data); in gen_pool_for_each_chunk()
545 * gen_pool_has_addr - checks if an address falls within the range of a pool
546 * @pool: the generic memory pool
550 * Check if the range of addresses falls within the specified pool. Returns
551 * true if the entire range is contained in the pool and false otherwise.
553 bool gen_pool_has_addr(struct gen_pool *pool, unsigned long start, in gen_pool_has_addr() argument
557 unsigned long end = start + size - 1; in gen_pool_has_addr()
561 list_for_each_entry_rcu(chunk, &(pool)->chunks, next_chunk) { in gen_pool_has_addr()
562 if (start >= chunk->start_addr && start <= chunk->end_addr) { in gen_pool_has_addr()
563 if (end <= chunk->end_addr) { in gen_pool_has_addr()
575 * gen_pool_avail - get available free space of the pool
576 * @pool: pool to get available free space
578 * Return available free space of the specified pool.
580 size_t gen_pool_avail(struct gen_pool *pool) in gen_pool_avail() argument
586 list_for_each_entry_rcu(chunk, &pool->chunks, next_chunk) in gen_pool_avail()
587 avail += atomic_long_read(&chunk->avail); in gen_pool_avail()
594 * gen_pool_size - get size in bytes of memory managed by the pool
595 * @pool: pool to get size
597 * Return size in bytes of memory managed by the pool.
599 size_t gen_pool_size(struct gen_pool *pool) in gen_pool_size() argument
605 list_for_each_entry_rcu(chunk, &pool->chunks, next_chunk) in gen_pool_size()
613 * gen_pool_set_algo - set the allocation algorithm
614 * @pool: pool to change allocation algorithm
618 * Call @algo for each memory allocation in the pool.
622 void gen_pool_set_algo(struct gen_pool *pool, genpool_algo_t algo, void *data) in gen_pool_set_algo() argument
626 pool->algo = algo; in gen_pool_set_algo()
627 if (!pool->algo) in gen_pool_set_algo()
628 pool->algo = gen_pool_first_fit; in gen_pool_set_algo()
630 pool->data = data; in gen_pool_set_algo()
637 * gen_pool_first_fit - find the first available region
643 * @data: additional data - unused
644 * @pool: pool to find the fit region memory from
649 struct gen_pool *pool, unsigned long start_addr) in gen_pool_first_fit() argument
656 * gen_pool_first_fit_align - find the first available region
663 * @pool: pool to get order from
668 struct gen_pool *pool, unsigned long start_addr) in gen_pool_first_fit_align() argument
675 order = pool->min_alloc_order; in gen_pool_first_fit_align()
676 align_mask = ((alignment->align + (1UL << order) - 1) >> order) - 1; in gen_pool_first_fit_align()
677 align_off = (start_addr & (alignment->align - 1)) >> order; in gen_pool_first_fit_align()
685 * gen_pool_fixed_alloc - reserve a specific region
691 * @pool: pool to get order from
696 struct gen_pool *pool, unsigned long start_addr) in gen_pool_fixed_alloc() argument
704 order = pool->min_alloc_order; in gen_pool_fixed_alloc()
705 offset_bit = fixed_data->offset >> order; in gen_pool_fixed_alloc()
706 if (WARN_ON(fixed_data->offset & ((1UL << order) - 1))) in gen_pool_fixed_alloc()
718 * gen_pool_first_fit_order_align - find the first available region
725 * @data: additional data - unused
726 * @pool: pool to find the fit region memory from
731 unsigned int nr, void *data, struct gen_pool *pool, in gen_pool_first_fit_order_align() argument
734 unsigned long align_mask = roundup_pow_of_two(nr) - 1; in gen_pool_first_fit_order_align()
741 * gen_pool_best_fit - find the best fitting region of memory
747 * @data: additional data - unused
748 * @pool: pool to find the fit region memory from
756 struct gen_pool *pool, unsigned long start_addr) in gen_pool_best_fit() argument
766 if ((next_bit - index) < len) { in gen_pool_best_fit()
767 len = next_bit - index; in gen_pool_best_fit()
789 /* NULL data matches only a pool without an assigned name */ in devm_gen_pool_match()
790 if (!data && !(*p)->name) in devm_gen_pool_match()
793 if (!data || !(*p)->name) in devm_gen_pool_match()
796 return !strcmp((*p)->name, data); in devm_gen_pool_match()
800 * gen_pool_get - Obtain the gen_pool (if any) for a device
819 * devm_gen_pool_create - managed gen_pool_create
825 * Create a new special memory pool that can be used to manage special purpose
826 * memory not managed by the regular kmalloc/kfree interface. The pool will be
832 struct gen_pool **ptr, *pool; in devm_gen_pool_create() local
837 return ERR_PTR(-EINVAL); in devm_gen_pool_create()
842 return ERR_PTR(-ENOMEM); in devm_gen_pool_create()
849 pool = gen_pool_create(min_alloc_order, nid); in devm_gen_pool_create()
850 if (!pool) in devm_gen_pool_create()
853 *ptr = pool; in devm_gen_pool_create()
854 pool->name = pool_name; in devm_gen_pool_create()
857 return pool; in devm_gen_pool_create()
864 return ERR_PTR(-ENOMEM); in devm_gen_pool_create()
870 * of_gen_pool_get - find a pool by phandle property
875 * Returns the pool that contains the chunk starting at the physical
885 struct gen_pool *pool = NULL; in of_gen_pool_get() local
903 pool = gen_pool_get(&pdev->dev, name); in of_gen_pool_get()
906 return pool; in of_gen_pool_get()