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Use x86_lfence/x86_sfence instead of linux wmb()/mb()

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This commit is contained in:
bouyer 2006-03-06 20:00:06 +00:00
parent 9c7083dfa0
commit 2e57249e9d
1 changed files with 8 additions and 8 deletions
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16
sys/arch/xen/include/xen3-public/io/ring.h
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@ -182,12 +182,12 @@ typedef struct __name##_back_ring __name##_back_ring_t
(((_cons) - (_r)->rsp_prod_pvt) >= RING_SIZE(_r))
#define RING_PUSH_REQUESTS(_r) do { \
wmb(); /* back sees requests /before/ updated producer index */ \
x86_lfence(); /* back sees requests /before/ updated producer index */ \
(_r)->sring->req_prod = (_r)->req_prod_pvt; \
} while (0)
#define RING_PUSH_RESPONSES(_r) do { \
wmb(); /* front sees responses /before/ updated producer index */ \
x86_lfence(); /* front sees responses /before/ updated producer index */ \
(_r)->sring->rsp_prod = (_r)->rsp_prod_pvt; \
} while (0)
@ -224,9 +224,9 @@ typedef struct __name##_back_ring __name##_back_ring_t
#define RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(_r, _notify) do { \
RING_IDX __old = (_r)->sring->req_prod; \
RING_IDX __new = (_r)->req_prod_pvt; \
wmb(); /* back sees requests /before/ updated producer index */ \
x86_lfence(); /* back sees requests /before/ updated producer index */ \
(_r)->sring->req_prod = __new; \
mb(); /* back sees new requests /before/ we check req_event */ \
x86_sfence(); /* back sees new requests /before/ we check req_event */ \
(_notify) = ((RING_IDX)(__new - (_r)->sring->req_event) < \
(RING_IDX)(__new - __old)); \
} while (0)
@ -234,9 +234,9 @@ typedef struct __name##_back_ring __name##_back_ring_t
#define RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(_r, _notify) do { \
RING_IDX __old = (_r)->sring->rsp_prod; \
RING_IDX __new = (_r)->rsp_prod_pvt; \
wmb(); /* front sees responses /before/ updated producer index */ \
x86_lfence(); /* front sees responses /before/ updated producer index */ \
(_r)->sring->rsp_prod = __new; \
mb(); /* front sees new responses /before/ we check rsp_event */ \
x86_sfence(); /* front sees new responses /before/ we check rsp_event */ \
(_notify) = ((RING_IDX)(__new - (_r)->sring->rsp_event) < \
(RING_IDX)(__new - __old)); \
} while (0)
@ -245,7 +245,7 @@ typedef struct __name##_back_ring __name##_back_ring_t
(_work_to_do) = RING_HAS_UNCONSUMED_REQUESTS(_r); \
if (_work_to_do) break; \
(_r)->sring->req_event = (_r)->req_cons + 1; \
mb(); \
x86_sfence(); \
(_work_to_do) = RING_HAS_UNCONSUMED_REQUESTS(_r); \
} while (0)
@ -253,7 +253,7 @@ typedef struct __name##_back_ring __name##_back_ring_t
(_work_to_do) = RING_HAS_UNCONSUMED_RESPONSES(_r); \
if (_work_to_do) break; \
(_r)->sring->rsp_event = (_r)->rsp_cons + 1; \
mb(); \
x86_sfence(); \
(_work_to_do) = RING_HAS_UNCONSUMED_RESPONSES(_r); \
} while (0)