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34 #ifndef _RTE_MEMORY_H_
35 #define _RTE_MEMORY_H_
40 * Memory-related RTE API.
47 #include <rte_config.h>
49 #ifdef RTE_EXEC_ENV_LINUXAPP
50 #include <exec-env/rte_dom0_common.h>
57 #include <rte_common.h>
61 RTE_PGSIZE_4K = 1ULL << 12,
62 RTE_PGSIZE_64K = 1ULL << 16,
63 RTE_PGSIZE_256K = 1ULL << 18,
64 RTE_PGSIZE_2M = 1ULL << 21,
65 RTE_PGSIZE_16M = 1ULL << 24,
66 RTE_PGSIZE_256M = 1ULL << 28,
67 RTE_PGSIZE_512M = 1ULL << 29,
68 RTE_PGSIZE_1G = 1ULL << 30,
69 RTE_PGSIZE_4G = 1ULL << 32,
70 RTE_PGSIZE_16G = 1ULL << 34,
73 #define SOCKET_ID_ANY -1 /**< Any NUMA socket. */
74 #define RTE_CACHE_LINE_MASK (RTE_CACHE_LINE_SIZE-1) /**< Cache line mask. */
76 #define RTE_CACHE_LINE_ROUNDUP(size) \
77 (RTE_CACHE_LINE_SIZE * ((size + RTE_CACHE_LINE_SIZE - 1) / RTE_CACHE_LINE_SIZE))
78 /**< Return the first cache-aligned value greater or equal to size. */
80 /**< Cache line size in terms of log2 */
81 #if RTE_CACHE_LINE_SIZE == 64
82 #define RTE_CACHE_LINE_SIZE_LOG2 6
83 #elif RTE_CACHE_LINE_SIZE == 128
84 #define RTE_CACHE_LINE_SIZE_LOG2 7
86 #error "Unsupported cache line size"
89 #define RTE_CACHE_LINE_MIN_SIZE 64 /**< Minimum Cache line size. */
92 * Force alignment to cache line.
94 #define __rte_cache_aligned __rte_aligned(RTE_CACHE_LINE_SIZE)
97 * Force minimum cache line alignment.
99 #define __rte_cache_min_aligned __rte_aligned(RTE_CACHE_LINE_MIN_SIZE)
101 typedef uint64_t phys_addr_t; /**< Physical address definition. */
102 #define RTE_BAD_PHYS_ADDR ((phys_addr_t)-1)
105 * Physical memory segment descriptor.
108 phys_addr_t phys_addr; /**< Start physical address. */
111 void *addr; /**< Start virtual address. */
112 uint64_t addr_64; /**< Makes sure addr is always 64 bits */
114 size_t len; /**< Length of the segment. */
115 uint64_t hugepage_sz; /**< The pagesize of underlying memory */
116 int32_t socket_id; /**< NUMA socket ID. */
117 uint32_t nchannel; /**< Number of channels. */
118 uint32_t nrank; /**< Number of ranks. */
119 #ifdef RTE_LIBRTE_XEN_DOM0
120 /**< store segment MFNs */
121 uint64_t mfn[DOM0_NUM_MEMBLOCK];
126 * Lock page in physical memory and prevent from swapping.
129 * The virtual address.
131 * 0 on success, negative on error.
133 int rte_mem_lock_page(const void *virt);
136 * Get physical address of any mapped virtual address in the current process.
137 * It is found by browsing the /proc/self/pagemap special file.
138 * The page must be locked.
141 * The virtual address.
143 * The physical address or RTE_BAD_PHYS_ADDR on error.
145 phys_addr_t rte_mem_virt2phy(const void *virt);
148 * Get the layout of the available physical memory.
150 * It can be useful for an application to have the full physical
151 * memory layout to decide the size of a memory zone to reserve. This
152 * table is stored in rte_config (see rte_eal_get_configuration()).
155 * - On success, return a pointer to a read-only table of struct
156 * rte_physmem_desc elements, containing the layout of all
157 * addressable physical memory. The last element of the table
158 * contains a NULL address.
159 * - On error, return NULL. This should not happen since it is a fatal
160 * error that will probably cause the entire system to panic.
162 const struct rte_memseg *rte_eal_get_physmem_layout(void);
165 * Dump the physical memory layout to a file.
168 * A pointer to a file for output
170 void rte_dump_physmem_layout(FILE *f);
173 * Get the total amount of available physical memory.
176 * The total amount of available physical memory in bytes.
178 uint64_t rte_eal_get_physmem_size(void);
181 * Get the number of memory channels.
184 * The number of memory channels on the system. The value is 0 if unknown
185 * or not the same on all devices.
187 unsigned rte_memory_get_nchannel(void);
190 * Get the number of memory ranks.
193 * The number of memory ranks on the system. The value is 0 if unknown or
194 * not the same on all devices.
196 unsigned rte_memory_get_nrank(void);
198 #ifdef RTE_LIBRTE_XEN_DOM0
200 /**< Internal use only - should DOM0 memory mapping be used */
201 int rte_xen_dom0_supported(void);
203 /**< Internal use only - phys to virt mapping for xen */
204 phys_addr_t rte_xen_mem_phy2mch(int32_t, const phys_addr_t);
207 * Return the physical address of elt, which is an element of the pool mp.
210 * Identifier of the memory segment owning the physical address. If
211 * set to -1, find it automatically.
213 * physical address of elt.
216 * The physical address or RTE_BAD_PHYS_ADDR on error.
218 static inline phys_addr_t
219 rte_mem_phy2mch(int32_t memseg_id, const phys_addr_t phy_addr)
221 if (rte_xen_dom0_supported())
222 return rte_xen_mem_phy2mch(memseg_id, phy_addr);
228 * Memory init for supporting application running on Xen domain0.
236 int rte_xen_dom0_memory_init(void);
239 * Attach to memory setments of primary process on Xen domain0.
247 int rte_xen_dom0_memory_attach(void);
249 static inline int rte_xen_dom0_supported(void)
254 static inline phys_addr_t
255 rte_mem_phy2mch(int32_t memseg_id __rte_unused, const phys_addr_t phy_addr)
265 #endif /* _RTE_MEMORY_H_ */