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34 #ifndef _RTE_MEMORY_H_
35 #define _RTE_MEMORY_H_
40 * Memory-related RTE API.
47 #ifdef RTE_EXEC_ENV_LINUXAPP
48 #include <exec-env/rte_dom0_common.h>
55 #include <rte_common.h>
58 RTE_PGSIZE_4K = 1ULL << 12,
59 RTE_PGSIZE_64K = 1ULL << 16,
60 RTE_PGSIZE_256K = 1ULL << 18,
61 RTE_PGSIZE_2M = 1ULL << 21,
62 RTE_PGSIZE_16M = 1ULL << 24,
63 RTE_PGSIZE_256M = 1ULL << 28,
64 RTE_PGSIZE_512M = 1ULL << 29,
65 RTE_PGSIZE_1G = 1ULL << 30,
66 RTE_PGSIZE_4G = 1ULL << 32,
67 RTE_PGSIZE_16G = 1ULL << 34,
70 #define SOCKET_ID_ANY -1 /**< Any NUMA socket. */
71 #define RTE_CACHE_LINE_MASK (RTE_CACHE_LINE_SIZE-1) /**< Cache line mask. */
73 #define RTE_CACHE_LINE_ROUNDUP(size) \
74 (RTE_CACHE_LINE_SIZE * ((size + RTE_CACHE_LINE_SIZE - 1) / RTE_CACHE_LINE_SIZE))
75 /**< Return the first cache-aligned value greater or equal to size. */
78 * Force alignment to cache line.
80 #define __rte_cache_aligned __rte_aligned(RTE_CACHE_LINE_SIZE)
82 typedef uint64_t phys_addr_t; /**< Physical address definition. */
83 #define RTE_BAD_PHYS_ADDR ((phys_addr_t)-1)
86 * Physical memory segment descriptor.
89 phys_addr_t phys_addr; /**< Start physical address. */
91 void *addr; /**< Start virtual address. */
92 uint64_t addr_64; /**< Makes sure addr is always 64 bits */
94 #ifdef RTE_LIBRTE_IVSHMEM
95 phys_addr_t ioremap_addr; /**< Real physical address inside the VM */
97 size_t len; /**< Length of the segment. */
98 uint64_t hugepage_sz; /**< The pagesize of underlying memory */
99 int32_t socket_id; /**< NUMA socket ID. */
100 uint32_t nchannel; /**< Number of channels. */
101 uint32_t nrank; /**< Number of ranks. */
102 #ifdef RTE_LIBRTE_XEN_DOM0
103 /**< store segment MFNs */
104 uint64_t mfn[DOM0_NUM_MEMBLOCK];
109 * Lock page in physical memory and prevent from swapping.
112 * The virtual address.
114 * 0 on success, negative on error.
116 int rte_mem_lock_page(const void *virt);
119 * Get physical address of any mapped virtual address in the current process.
120 * It is found by browsing the /proc/self/pagemap special file.
121 * The page must be locked.
124 * The virtual address.
126 * The physical address or RTE_BAD_PHYS_ADDR on error.
128 phys_addr_t rte_mem_virt2phy(const void *virt);
131 * Get the layout of the available physical memory.
133 * It can be useful for an application to have the full physical
134 * memory layout to decide the size of a memory zone to reserve. This
135 * table is stored in rte_config (see rte_eal_get_configuration()).
138 * - On success, return a pointer to a read-only table of struct
139 * rte_physmem_desc elements, containing the layout of all
140 * addressable physical memory. The last element of the table
141 * contains a NULL address.
142 * - On error, return NULL. This should not happen since it is a fatal
143 * error that will probably cause the entire system to panic.
145 const struct rte_memseg *rte_eal_get_physmem_layout(void);
148 * Dump the physical memory layout to the console.
151 * A pointer to a file for output
153 void rte_dump_physmem_layout(FILE *f);
156 * Get the total amount of available physical memory.
159 * The total amount of available physical memory in bytes.
161 uint64_t rte_eal_get_physmem_size(void);
164 * Get the number of memory channels.
167 * The number of memory channels on the system. The value is 0 if unknown
168 * or not the same on all devices.
170 unsigned rte_memory_get_nchannel(void);
173 * Get the number of memory ranks.
176 * The number of memory ranks on the system. The value is 0 if unknown or
177 * not the same on all devices.
179 unsigned rte_memory_get_nrank(void);
181 #ifdef RTE_LIBRTE_XEN_DOM0
183 /**< Internal use only - should DOM0 memory mapping be used */
184 int rte_xen_dom0_supported(void);
186 /**< Internal use only - phys to virt mapping for xen */
187 phys_addr_t rte_xen_mem_phy2mch(uint32_t, const phys_addr_t);
190 * Return the physical address of elt, which is an element of the pool mp.
193 * The mempool is from which memory segment.
195 * physical address of elt.
198 * The physical address or error.
200 static inline phys_addr_t
201 rte_mem_phy2mch(uint32_t memseg_id, const phys_addr_t phy_addr)
203 if (rte_xen_dom0_supported())
204 return rte_xen_mem_phy2mch(memseg_id, phy_addr);
210 * Memory init for supporting application running on Xen domain0.
218 int rte_xen_dom0_memory_init(void);
221 * Attach to memory setments of primary process on Xen domain0.
229 int rte_xen_dom0_memory_attach(void);
231 static inline int rte_xen_dom0_supported(void)
236 static inline phys_addr_t
237 rte_mem_phy2mch(uint32_t memseg_id __rte_unused, const phys_addr_t phy_addr)
247 #endif /* _RTE_MEMORY_H_ */