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rte_io.h(3) DPDK rte_io.h(3) NAME rte_io.h SYNOPSIS #include <stdint.h> #include <rte_common.h> #include <rte_compat.h> #include <rte_atomic.h> Functions static uint8_t rte_read8_relaxed (const volatile void *addr) static uint16_t rte_read16_relaxed (const volatile void *addr) static uint32_t rte_read32_relaxed (const volatile void *addr) static uint64_t rte_read64_relaxed (const volatile void *addr) static void rte_write8_relaxed (uint8_t value, volatile void *addr) static void rte_write16_relaxed (uint16_t value, volatile void *addr) static void rte_write32_relaxed (uint32_t value, volatile void *addr) static void rte_write64_relaxed (uint64_t value, volatile void *addr) static uint8_t rte_read8 (const volatile void *addr) static uint16_t rte_read16 (const volatile void *addr) static uint32_t rte_read32 (const volatile void *addr) static uint64_t rte_read64 (const volatile void *addr) static void rte_write8 (uint8_t value, volatile void *addr) static void rte_write16 (uint16_t value, volatile void *addr) static void rte_write32 (uint32_t value, volatile void *addr) static void rte_write64 (uint64_t value, volatile void *addr) static __rte_experimental void rte_write32_wc (uint32_t value, volatile void *addr) static __rte_experimental void rte_write32_wc_relaxed (uint32_t value, volatile void *addr) Detailed Description I/O device memory operations This file defines the generic API for I/O device memory read/write operations Definition in file rte_io.h. Function Documentation static __rte_always_inline uint8_t rte_read8_relaxed (const volatile void * addr) [inline], [static] Read a 8-bit value from I/O device memory address addr. The relaxed version does not have additional I/O memory barrier, useful in accessing the device registers of integrated controllers which implicitly strongly ordered with respect to memory access. Parameters addr I/O memory address to read the value from Returns read value Definition at line 276 of file rte_io.h. static __rte_always_inline uint16_t rte_read16_relaxed (const volatile void * addr) [inline], [static] Read a 16-bit value from I/O device memory address addr. The relaxed version does not have additional I/O memory barrier, useful in accessing the device registers of integrated controllers which implicitly strongly ordered with respect to memory access. Parameters addr I/O memory address to read the value from Returns read value Definition at line 282 of file rte_io.h. static __rte_always_inline uint32_t rte_read32_relaxed (const volatile void * addr) [inline], [static] Read a 32-bit value from I/O device memory address addr. The relaxed version does not have additional I/O memory barrier, useful in accessing the device registers of integrated controllers which implicitly strongly ordered with respect to memory access. Parameters addr I/O memory address to read the value from Returns read value Definition at line 288 of file rte_io.h. static __rte_always_inline uint64_t rte_read64_relaxed (const volatile void * addr) [inline], [static] Read a 64-bit value from I/O device memory address addr. The relaxed version does not have additional I/O memory barrier, useful in accessing the device registers of integrated controllers which implicitly strongly ordered with respect to memory access. Parameters addr I/O memory address to read the value from Returns read value Definition at line 294 of file rte_io.h. static __rte_always_inline void rte_write8_relaxed (uint8_t value, volatile void * addr) [inline], [static] Write a 8-bit value to I/O device memory address addr. The relaxed version does not have additional I/O memory barrier, useful in accessing the device registers of integrated controllers which implicitly strongly ordered with respect to memory access. Parameters value Value to write addr I/O memory address to write the value to Definition at line 300 of file rte_io.h. static __rte_always_inline void rte_write16_relaxed (uint16_t value, volatile void * addr) [inline], [static] Write a 16-bit value to I/O device memory address addr. The relaxed version does not have additional I/O memory barrier, useful in accessing the device registers of integrated controllers which implicitly strongly ordered with respect to memory access. Parameters value Value to write addr I/O memory address to write the value to Definition at line 306 of file rte_io.h. static __rte_always_inline void rte_write32_relaxed (uint32_t value, volatile void * addr) [inline], [static] Write a 32-bit value to I/O device memory address addr. The relaxed version does not have additional I/O memory barrier, useful in accessing the device registers of integrated controllers which implicitly strongly ordered with respect to memory access. Parameters value Value to write addr I/O memory address to write the value to Definition at line 312 of file rte_io.h. static __rte_always_inline void rte_write64_relaxed (uint64_t value, volatile void * addr) [inline], [static] Write a 64-bit value to I/O device memory address addr. The relaxed version does not have additional I/O memory barrier, useful in accessing the device registers of integrated controllers which implicitly strongly ordered with respect to memory access. Parameters value Value to write addr I/O memory address to write the value to Definition at line 318 of file rte_io.h. static __rte_always_inline uint8_t rte_read8 (const volatile void * addr) [inline], [static] Read a 8-bit value from I/O device memory address addr. Parameters addr I/O memory address to read the value from Returns read value Definition at line 324 of file rte_io.h. static __rte_always_inline uint16_t rte_read16 (const volatile void * addr) [inline], [static] Read a 16-bit value from I/O device memory address addr. Parameters addr I/O memory address to read the value from Returns read value Definition at line 333 of file rte_io.h. static __rte_always_inline uint32_t rte_read32 (const volatile void * addr) [inline], [static] Read a 32-bit value from I/O device memory address addr. Parameters addr I/O memory address to read the value from Returns read value Definition at line 342 of file rte_io.h. static __rte_always_inline uint64_t rte_read64 (const volatile void * addr) [inline], [static] Read a 64-bit value from I/O device memory address addr. Parameters addr I/O memory address to read the value from Returns read value Definition at line 351 of file rte_io.h. static __rte_always_inline void rte_write8 (uint8_t value, volatile void * addr) [inline], [static] Write a 8-bit value to I/O device memory address addr. Parameters value Value to write addr I/O memory address to write the value to Definition at line 360 of file rte_io.h. static __rte_always_inline void rte_write16 (uint16_t value, volatile void * addr) [inline], [static] Write a 16-bit value to I/O device memory address addr. Parameters value Value to write addr I/O memory address to write the value to Definition at line 367 of file rte_io.h. static __rte_always_inline void rte_write32 (uint32_t value, volatile void * addr) [inline], [static] Write a 32-bit value to I/O device memory address addr. Parameters value Value to write addr I/O memory address to write the value to Definition at line 374 of file rte_io.h. static __rte_always_inline void rte_write64 (uint64_t value, volatile void * addr) [inline], [static] Write a 64-bit value to I/O device memory address addr. Parameters value Value to write addr I/O memory address to write the value to Definition at line 381 of file rte_io.h. static __rte_always_inline void rte_write32_wc (uint32_t value, volatile void * addr) [inline], [static] Write a 32-bit value to I/O device memory address addr using write combining memory write protocol. Depending on the platform write combining may not be available and/or may be treated as a hint and the behavior may fallback to a regular store. Parameters value Value to write addr I/O memory address to write the value to Definition at line 389 of file rte_io.h. static __rte_always_inline void rte_write32_wc_relaxed (uint32_t value, volatile void * addr) [inline], [static] Write a 32-bit value to I/O device memory address addr using write combining memory write protocol. Depending on the platform write combining may not be available and/or may be treated as a hint and the behavior may fallback to a regular store. The relaxed version does not have additional I/O memory barrier, useful in accessing the device registers of integrated controllers which implicitly strongly ordered with respect to memory access. Parameters value Value to write addr I/O memory address to write the value to Definition at line 395 of file rte_io.h. Author Generated automatically by Doxygen for DPDK from the source code. Version 25.11.0 Thu Jun 11 2026 rte_io.h(3)
NAME | SYNOPSIS | Detailed Description | Function Documentation | Author
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