diff options
Diffstat (limited to 'src/dpdk22/lib/librte_eal/common/include/arch/x86/rte_spinlock.h')
| -rw-r--r-- | src/dpdk22/lib/librte_eal/common/include/arch/x86/rte_spinlock.h | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/src/dpdk22/lib/librte_eal/common/include/arch/x86/rte_spinlock.h b/src/dpdk22/lib/librte_eal/common/include/arch/x86/rte_spinlock.h deleted file mode 100644 index 20ef0a79..00000000 --- a/src/dpdk22/lib/librte_eal/common/include/arch/x86/rte_spinlock.h +++ /dev/null @@ -1,201 +0,0 @@ -/*- - * BSD LICENSE - * - * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Intel Corporation nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#ifndef _RTE_SPINLOCK_X86_64_H_ -#define _RTE_SPINLOCK_X86_64_H_ - -#ifdef __cplusplus -extern "C" { -#endif - -#include "generic/rte_spinlock.h" -#include "rte_rtm.h" -#include "rte_cpuflags.h" -#include "rte_branch_prediction.h" -#include "rte_common.h" - -#define RTE_RTM_MAX_RETRIES (10) -#define RTE_XABORT_LOCK_BUSY (0xff) - -#ifndef RTE_FORCE_INTRINSICS -static inline void -rte_spinlock_lock(rte_spinlock_t *sl) -{ - int lock_val = 1; - asm volatile ( - "1:\n" - "xchg %[locked], %[lv]\n" - "test %[lv], %[lv]\n" - "jz 3f\n" - "2:\n" - "pause\n" - "cmpl $0, %[locked]\n" - "jnz 2b\n" - "jmp 1b\n" - "3:\n" - : [locked] "=m" (sl->locked), [lv] "=q" (lock_val) - : "[lv]" (lock_val) - : "memory"); -} - -static inline void -rte_spinlock_unlock (rte_spinlock_t *sl) -{ - int unlock_val = 0; - asm volatile ( - "xchg %[locked], %[ulv]\n" - : [locked] "=m" (sl->locked), [ulv] "=q" (unlock_val) - : "[ulv]" (unlock_val) - : "memory"); -} - -static inline int -rte_spinlock_trylock (rte_spinlock_t *sl) -{ - int lockval = 1; - - asm volatile ( - "xchg %[locked], %[lockval]" - : [locked] "=m" (sl->locked), [lockval] "=q" (lockval) - : "[lockval]" (lockval) - : "memory"); - - return (lockval == 0); -} -#endif - -static uint8_t rtm_supported; /* cache the flag to avoid the overhead - of the rte_cpu_get_flag_enabled function */ - -static inline void __attribute__((constructor)) -rte_rtm_init(void) -{ - rtm_supported = rte_cpu_get_flag_enabled(RTE_CPUFLAG_RTM); -} - -static inline int rte_tm_supported(void) -{ - return rtm_supported; -} - -static inline int -rte_try_tm(volatile int *lock) -{ - if (!rtm_supported) - return 0; - - int retries = RTE_RTM_MAX_RETRIES; - - while (likely(retries--)) { - - unsigned int status = rte_xbegin(); - - if (likely(RTE_XBEGIN_STARTED == status)) { - if (unlikely(*lock)) - rte_xabort(RTE_XABORT_LOCK_BUSY); - else - return 1; - } - while (*lock) - rte_pause(); - - if ((status & RTE_XABORT_EXPLICIT) && - (RTE_XABORT_CODE(status) == RTE_XABORT_LOCK_BUSY)) - continue; - - if ((status & RTE_XABORT_RETRY) == 0) /* do not retry */ - break; - } - return 0; -} - -static inline void -rte_spinlock_lock_tm(rte_spinlock_t *sl) -{ - if (likely(rte_try_tm(&sl->locked))) - return; - - rte_spinlock_lock(sl); /* fall-back */ -} - -static inline int -rte_spinlock_trylock_tm(rte_spinlock_t *sl) -{ - if (likely(rte_try_tm(&sl->locked))) - return 1; - - return rte_spinlock_trylock(sl); -} - -static inline void -rte_spinlock_unlock_tm(rte_spinlock_t *sl) -{ - if (unlikely(sl->locked)) - rte_spinlock_unlock(sl); - else - rte_xend(); -} - -static inline void -rte_spinlock_recursive_lock_tm(rte_spinlock_recursive_t *slr) -{ - if (likely(rte_try_tm(&slr->sl.locked))) - return; - - rte_spinlock_recursive_lock(slr); /* fall-back */ -} - -static inline void -rte_spinlock_recursive_unlock_tm(rte_spinlock_recursive_t *slr) -{ - if (unlikely(slr->sl.locked)) - rte_spinlock_recursive_unlock(slr); - else - rte_xend(); -} - -static inline int -rte_spinlock_recursive_trylock_tm(rte_spinlock_recursive_t *slr) -{ - if (likely(rte_try_tm(&slr->sl.locked))) - return 1; - - return rte_spinlock_recursive_trylock(slr); -} - - -#ifdef __cplusplus -} -#endif - -#endif /* _RTE_SPINLOCK_X86_64_H_ */ |