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Linux Kernel
3.7.1
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Linux Kernel
3.7.1
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Go to the source code of this file.
Data Structures | |
| struct | gen_pool |
| struct | gen_pool_chunk |
Typedefs | |
| typedef unsigned long(* | genpool_algo_t )(unsigned long *map, unsigned long size, unsigned long start, unsigned int nr, void *data) |
Functions | |
| struct gen_pool * | gen_pool_create (int, int) |
| phys_addr_t | gen_pool_virt_to_phys (struct gen_pool *pool, unsigned long) |
| int | gen_pool_add_virt (struct gen_pool *, unsigned long, phys_addr_t, size_t, int) |
| void | gen_pool_destroy (struct gen_pool *) |
| unsigned long | gen_pool_alloc (struct gen_pool *, size_t) |
| void | gen_pool_free (struct gen_pool *, unsigned long, size_t) |
| void | gen_pool_for_each_chunk (struct gen_pool *, void(*)(struct gen_pool *, struct gen_pool_chunk *, void *), void *) |
| size_t | gen_pool_avail (struct gen_pool *) |
| size_t | gen_pool_size (struct gen_pool *) |
| void | gen_pool_set_algo (struct gen_pool *pool, genpool_algo_t algo, void *data) |
| unsigned long | gen_pool_first_fit (unsigned long *map, unsigned long size, unsigned long start, unsigned int nr, void *data) |
| unsigned long | gen_pool_best_fit (unsigned long *map, unsigned long size, unsigned long start, unsigned int nr, void *data) |
| int gen_pool_add_virt | ( | struct gen_pool * | pool, |
| unsigned long | virt, | ||
| phys_addr_t | phys, | ||
| size_t | size, | ||
| int | nid | ||
| ) |
gen_pool_add_virt - add a new chunk of special memory to the pool : pool to add new memory chunk to : virtual starting address of memory chunk to add to pool : physical starting address of memory chunk to add to pool : size in bytes of the memory chunk to add to pool : node id of the node the chunk structure and bitmap should be allocated on, or -1
Add a new chunk of special memory to the specified pool.
Returns 0 on success or a -ve errno on failure.
Definition at line 175 of file genalloc.c.
gen_pool_alloc - allocate special memory from the pool : pool to allocate from : number of bytes to allocate from the pool
Allocate the requested number of bytes from the specified pool. Uses the pool allocation function (with first-fit algorithm by default). Can not be used in NMI handler on architectures without NMI-safe cmpxchg implementation.
Definition at line 264 of file genalloc.c.
gen_pool_avail - get available free space of the pool : pool to get available free space
Return available free space of the specified pool.
Definition at line 375 of file genalloc.c.
| unsigned long gen_pool_best_fit | ( | unsigned long * | map, |
| unsigned long | size, | ||
| unsigned long | start, | ||
| unsigned int | nr, | ||
| void * | data | ||
| ) |
gen_pool_best_fit - find the best fitting region of memory macthing the size requirement (no alignment constraint) : The address to base the search on : The bitmap size in bits : The bitnumber to start searching at : The number of zeroed bits we're looking for : additional data - unused
Iterate over the bitmap to find the smallest free region which we can allocate the memory.
Definition at line 459 of file genalloc.c.
gen_pool_create - create a new special memory pool : log base 2 of number of bytes each bitmap bit represents : node id of the node the pool structure should be allocated on, or -1
Create a new special memory pool that can be used to manage special purpose memory not managed by the regular kmalloc/kfree interface.
Definition at line 146 of file genalloc.c.
gen_pool_destroy - destroy a special memory pool : pool to destroy
Destroy the specified special memory pool. Verifies that there are no outstanding allocations.
Definition at line 232 of file genalloc.c.
| unsigned long gen_pool_first_fit | ( | unsigned long * | map, |
| unsigned long | size, | ||
| unsigned long | start, | ||
| unsigned int | nr, | ||
| void * | data | ||
| ) |
gen_pool_first_fit - find the first available region of memory matching the size requirement (no alignment constraint) : The address to base the search on : The bitmap size in bits : The bitnumber to start searching at : The number of zeroed bits we're looking for : additional data - unused
Definition at line 440 of file genalloc.c.
| void gen_pool_for_each_chunk | ( | struct gen_pool * | , |
| void(*)(struct gen_pool *, struct gen_pool_chunk *, void *) | , | ||
| void * | |||
| ) |
gen_pool_free - free allocated special memory back to the pool : pool to free to : starting address of memory to free back to pool : size in bytes of memory to free
Free previously allocated special memory back to the specified pool. Can not be used in NMI handler on architectures without NMI-safe cmpxchg implementation.
Definition at line 318 of file genalloc.c.
| void gen_pool_set_algo | ( | struct gen_pool * | pool, |
| genpool_algo_t | algo, | ||
| void * | data | ||
| ) |
gen_pool_set_algo - set the allocation algorithm : pool to change allocation algorithm : custom algorithm function : additional data used by
Call for each memory allocation in the pool. If is NULL use gen_pool_first_fit as default memory allocation function.
Definition at line 417 of file genalloc.c.
gen_pool_size - get size in bytes of memory managed by the pool : pool to get size
Return size in bytes of memory managed by the pool.
Definition at line 394 of file genalloc.c.
| phys_addr_t gen_pool_virt_to_phys | ( | struct gen_pool * | pool, |
| unsigned long | addr | ||
| ) |
gen_pool_virt_to_phys - return the physical address of memory : pool to allocate from : starting address of memory
Returns the physical address on success, or -1 on error.
Definition at line 207 of file genalloc.c.
1.8.2