ceph/src/dpdk/lib/librte_eal/common/include/rte_malloc.h

   1 /*-
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  33
  34 #ifndef _RTE_MALLOC_H_
  35 #define _RTE_MALLOC_H_
  36
  37 /**
  38  * @file
  39  * RTE Malloc. This library provides methods for dynamically allocating memory
  40  * from hugepages.
  41  */
  42
  43 #include <stdio.h>
  44 #include <stddef.h>
  45 #include <rte_memory.h>
  46
  47 #ifdef __cplusplus
  48 extern "C" {
  49 #endif
  50
  51 /**
  52  *  Structure to hold heap statistics obtained from rte_malloc_get_socket_stats function.
  53  */
  54 struct rte_malloc_socket_stats {
  55         size_t heap_totalsz_bytes; /**< Total bytes on heap */
  56         size_t heap_freesz_bytes;  /**< Total free bytes on heap */
  57         size_t greatest_free_size; /**< Size in bytes of largest free block */
  58         unsigned free_count;       /**< Number of free elements on heap */
  59         unsigned alloc_count;      /**< Number of allocated elements on heap */
  60         size_t heap_allocsz_bytes; /**< Total allocated bytes on heap */
  61 };
  62
  63 /**
  64  * This function allocates memory from the huge-page area of memory. The memory
  65  * is not cleared. In NUMA systems, the memory allocated resides on the same
  66  * NUMA socket as the core that calls this function.
  67  *
  68  * @param type
  69  *   A string identifying the type of allocated objects (useful for debug
  70  *   purposes, such as identifying the cause of a memory leak). Can be NULL.
  71  * @param size
  72  *   Size (in bytes) to be allocated.
  73  * @param align
  74  *   If 0, the return is a pointer that is suitably aligned for any kind of
  75  *   variable (in the same manner as malloc()).
  76  *   Otherwise, the return is a pointer that is a multiple of *align*. In
  77  *   this case, it must be a power of two. (Minimum alignment is the
  78  *   cacheline size, i.e. 64-bytes)
  79  * @return
  80  *   - NULL on error. Not enough memory, or invalid arguments (size is 0,
  81  *     align is not a power of two).
  82  *   - Otherwise, the pointer to the allocated object.
  83  */
  84 void *
  85 rte_malloc(const char *type, size_t size, unsigned align);
  86
  87 /**
  88  * Allocate zero'ed memory from the heap.
  89  *
  90  * Equivalent to rte_malloc() except that the memory zone is
  91  * initialised with zeros. In NUMA systems, the memory allocated resides on the
  92  * same NUMA socket as the core that calls this function.
  93  *
  94  * @param type
  95  *   A string identifying the type of allocated objects (useful for debug
  96  *   purposes, such as identifying the cause of a memory leak). Can be NULL.
  97  * @param size
  98  *   Size (in bytes) to be allocated.
  99  * @param align
 100  *   If 0, the return is a pointer that is suitably aligned for any kind of
 101  *   variable (in the same manner as malloc()).
 102  *   Otherwise, the return is a pointer that is a multiple of *align*. In
 103  *   this case, it must obviously be a power of two. (Minimum alignment is the
 104  *   cacheline size, i.e. 64-bytes)
 105  * @return
 106  *   - NULL on error. Not enough memory, or invalid arguments (size is 0,
 107  *     align is not a power of two).
 108  *   - Otherwise, the pointer to the allocated object.
 109  */
 110 void *
 111 rte_zmalloc(const char *type, size_t size, unsigned align);
 112
 113 /**
 114  * Replacement function for calloc(), using huge-page memory. Memory area is
 115  * initialised with zeros. In NUMA systems, the memory allocated resides on the
 116  * same NUMA socket as the core that calls this function.
 117  *
 118  * @param type
 119  *   A string identifying the type of allocated objects (useful for debug
 120  *   purposes, such as identifying the cause of a memory leak). Can be NULL.
 121  * @param num
 122  *   Number of elements to be allocated.
 123  * @param size
 124  *   Size (in bytes) of a single element.
 125  * @param align
 126  *   If 0, the return is a pointer that is suitably aligned for any kind of
 127  *   variable (in the same manner as malloc()).
 128  *   Otherwise, the return is a pointer that is a multiple of *align*. In
 129  *   this case, it must obviously be a power of two. (Minimum alignment is the
 130  *   cacheline size, i.e. 64-bytes)
 131  * @return
 132  *   - NULL on error. Not enough memory, or invalid arguments (size is 0,
 133  *     align is not a power of two).
 134  *   - Otherwise, the pointer to the allocated object.
 135  */
 136 void *
 137 rte_calloc(const char *type, size_t num, size_t size, unsigned align);
 138
 139 /**
 140  * Replacement function for realloc(), using huge-page memory. Reserved area
 141  * memory is resized, preserving contents. In NUMA systems, the new area
 142  * resides on the same NUMA socket as the old area.
 143  *
 144  * @param ptr
 145  *   Pointer to already allocated memory
 146  * @param size
 147  *   Size (in bytes) of new area. If this is 0, memory is freed.
 148  * @param align
 149  *   If 0, the return is a pointer that is suitably aligned for any kind of
 150  *   variable (in the same manner as malloc()).
 151  *   Otherwise, the return is a pointer that is a multiple of *align*. In
 152  *   this case, it must obviously be a power of two. (Minimum alignment is the
 153  *   cacheline size, i.e. 64-bytes)
 154  * @return
 155  *   - NULL on error. Not enough memory, or invalid arguments (size is 0,
 156  *     align is not a power of two).
 157  *   - Otherwise, the pointer to the reallocated memory.
 158  */
 159 void *
 160 rte_realloc(void *ptr, size_t size, unsigned align);
 161
 162 /**
 163  * This function allocates memory from the huge-page area of memory. The memory
 164  * is not cleared.
 165  *
 166  * @param type
 167  *   A string identifying the type of allocated objects (useful for debug
 168  *   purposes, such as identifying the cause of a memory leak). Can be NULL.
 169  * @param size
 170  *   Size (in bytes) to be allocated.
 171  * @param align
 172  *   If 0, the return is a pointer that is suitably aligned for any kind of
 173  *   variable (in the same manner as malloc()).
 174  *   Otherwise, the return is a pointer that is a multiple of *align*. In
 175  *   this case, it must be a power of two. (Minimum alignment is the
 176  *   cacheline size, i.e. 64-bytes)
 177  * @param socket
 178  *   NUMA socket to allocate memory on. If SOCKET_ID_ANY is used, this function
 179  *   will behave the same as rte_malloc().
 180  * @return
 181  *   - NULL on error. Not enough memory, or invalid arguments (size is 0,
 182  *     align is not a power of two).
 183  *   - Otherwise, the pointer to the allocated object.
 184  */
 185 void *
 186 rte_malloc_socket(const char *type, size_t size, unsigned align, int socket);
 187
 188 /**
 189  * Allocate zero'ed memory from the heap.
 190  *
 191  * Equivalent to rte_malloc() except that the memory zone is
 192  * initialised with zeros.
 193  *
 194  * @param type
 195  *   A string identifying the type of allocated objects (useful for debug
 196  *   purposes, such as identifying the cause of a memory leak). Can be NULL.
 197  * @param size
 198  *   Size (in bytes) to be allocated.
 199  * @param align
 200  *   If 0, the return is a pointer that is suitably aligned for any kind of
 201  *   variable (in the same manner as malloc()).
 202  *   Otherwise, the return is a pointer that is a multiple of *align*. In
 203  *   this case, it must obviously be a power of two. (Minimum alignment is the
 204  *   cacheline size, i.e. 64-bytes)
 205  * @param socket
 206  *   NUMA socket to allocate memory on. If SOCKET_ID_ANY is used, this function
 207  *   will behave the same as rte_zmalloc().
 208  * @return
 209  *   - NULL on error. Not enough memory, or invalid arguments (size is 0,
 210  *     align is not a power of two).
 211  *   - Otherwise, the pointer to the allocated object.
 212  */
 213 void *
 214 rte_zmalloc_socket(const char *type, size_t size, unsigned align, int socket);
 215
 216 /**
 217  * Replacement function for calloc(), using huge-page memory. Memory area is
 218  * initialised with zeros.
 219  *
 220  * @param type
 221  *   A string identifying the type of allocated objects (useful for debug
 222  *   purposes, such as identifying the cause of a memory leak). Can be NULL.
 223  * @param num
 224  *   Number of elements to be allocated.
 225  * @param size
 226  *   Size (in bytes) of a single element.
 227  * @param align
 228  *   If 0, the return is a pointer that is suitably aligned for any kind of
 229  *   variable (in the same manner as malloc()).
 230  *   Otherwise, the return is a pointer that is a multiple of *align*. In
 231  *   this case, it must obviously be a power of two. (Minimum alignment is the
 232  *   cacheline size, i.e. 64-bytes)
 233  * @param socket
 234  *   NUMA socket to allocate memory on. If SOCKET_ID_ANY is used, this function
 235  *   will behave the same as rte_calloc().
 236  * @return
 237  *   - NULL on error. Not enough memory, or invalid arguments (size is 0,
 238  *     align is not a power of two).
 239  *   - Otherwise, the pointer to the allocated object.
 240  */
 241 void *
 242 rte_calloc_socket(const char *type, size_t num, size_t size, unsigned align, int socket);
 243
 244 /**
 245  * Frees the memory space pointed to by the provided pointer.
 246  *
 247  * This pointer must have been returned by a previous call to
 248  * rte_malloc(), rte_zmalloc(), rte_calloc() or rte_realloc(). The behaviour of
 249  * rte_free() is undefined if the pointer does not match this requirement.
 250  *
 251  * If the pointer is NULL, the function does nothing.
 252  *
 253  * @param ptr
 254  *   The pointer to memory to be freed.
 255  */
 256 void
 257 rte_free(void *ptr);
 258
 259 /**
 260  * If malloc debug is enabled, check a memory block for header
 261  * and trailer markers to indicate that all is well with the block.
 262  * If size is non-null, also return the size of the block.
 263  *
 264  * @param ptr
 265  *   pointer to the start of a data block, must have been returned
 266  *   by a previous call to rte_malloc(), rte_zmalloc(), rte_calloc()
 267  *   or rte_realloc()
 268  * @param size
 269  *   if non-null, and memory block pointer is valid, returns the size
 270  *   of the memory block
 271  * @return
 272  *   -1 on error, invalid pointer passed or header and trailer markers
 273  *   are missing or corrupted
 274  *   0 on success
 275  */
 276 int
 277 rte_malloc_validate(const void *ptr, size_t *size);
 278
 279 /**
 280  * Get heap statistics for the specified heap.
 281  *
 282  * @param socket
 283  *   An unsigned integer specifying the socket to get heap statistics for
 284  * @param socket_stats
 285  *   A structure which provides memory to store statistics
 286  * @return
 287  *   Null on error
 288  *   Pointer to structure storing statistics on success
 289  */
 290 int
 291 rte_malloc_get_socket_stats(int socket,
 292                 struct rte_malloc_socket_stats *socket_stats);
 293
 294 /**
 295  * Dump statistics.
 296  *
 297  * Dump for the specified type to a file. If the type argument is
 298  * NULL, all memory types will be dumped.
 299  *
 300  * @param f
 301  *   A pointer to a file for output
 302  * @param type
 303  *   A string identifying the type of objects to dump, or NULL
 304  *   to dump all objects.
 305  */
 306 void
 307 rte_malloc_dump_stats(FILE *f, const char *type);
 308
 309 /**
 310  * Set the maximum amount of allocated memory for this type.
 311  *
 312  * This is not yet implemented
 313  *
 314  * @param type
 315  *   A string identifying the type of allocated objects.
 316  * @param max
 317  *   The maximum amount of allocated bytes for this type.
 318  * @return
 319  *   - 0: Success.
 320  *   - (-1): Error.
 321  */
 322 int
 323 rte_malloc_set_limit(const char *type, size_t max);
 324
 325 /**
 326  * Return the physical address of a virtual address obtained through
 327  * rte_malloc
 328  *
 329  * @param addr
 330  *   Adress obtained from a previous rte_malloc call
 331  * @return
 332  *   NULL on error
 333  *   otherwise return physical address of the buffer
 334  */
 335 phys_addr_t
 336 rte_malloc_virt2phy(const void *addr);
 337
 338 #ifdef __cplusplus
 339 }
 340 #endif
 341
 342 #endif /* _RTE_MALLOC_H_ */