RDS: Implement masked atomic operations
Add two CMSGs for masked versions of cswp and fadd. args
struct modified to use a union for different atomic op type's
arguments. Change IB to do masked atomic ops. Atomic op type
in rds_message similarly unionized.
Signed-off-by: Andy Grover <andy.grover@oracle.com>
diff --git a/include/linux/rds.h b/include/linux/rds.h
index 109f1d3..a2a5edb 100644
--- a/include/linux/rds.h
+++ b/include/linux/rds.h
@@ -75,6 +75,8 @@
#define RDS_CMSG_CONG_UPDATE 5
#define RDS_CMSG_ATOMIC_FADD 6
#define RDS_CMSG_ATOMIC_CSWP 7
+#define RDS_CMSG_MASKED_ATOMIC_FADD 8
+#define RDS_CMSG_MASKED_ATOMIC_CSWP 9
#define RDS_INFO_FIRST 10000
#define RDS_INFO_COUNTERS 10000
@@ -251,6 +253,16 @@
struct {
uint64_t add;
} fadd;
+ struct {
+ uint64_t compare;
+ uint64_t swap;
+ uint64_t compare_mask;
+ uint64_t swap_mask;
+ } m_cswp;
+ struct {
+ uint64_t add;
+ uint64_t nocarry_mask;
+ } m_fadd;
};
uint64_t flags;
uint64_t user_token;