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IB/srp: Split send and recieve CQs to reduce number of interrupts

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We can reduce the number of IB interrupts from two interrupts per
srp_queuecommand() call to one by using separate CQs for send and
receive completions and processing send completions by polling every
time a TX IU is allocated.

Receive completion events still trigger an interrupt.

Signed-off-by: Bart Van Assche <bart.vanassche@gmail.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Bart Van Assche 2010-02-02 19:23:54 +00:00 • committed by Roland Dreier
parent 676ad58553
commit 9c03dc9f19
2 changed files with 53 additions and 25 deletions
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6
drivers/infiniband/ulp/srp/ib_srp.h
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@ -60,7 +60,6 @@ enum {
SRP_RQ_SHIFT = 6,
SRP_RQ_SIZE = 1 << SRP_RQ_SHIFT,
SRP_SQ_SIZE = SRP_RQ_SIZE - 1,
SRP_CQ_SIZE = SRP_SQ_SIZE + SRP_RQ_SIZE,
SRP_TAG_TSK_MGMT = 1 << (SRP_RQ_SHIFT + 1),
@ -69,8 +68,6 @@ enum {
SRP_FMR_DIRTY_SIZE = SRP_FMR_POOL_SIZE / 4
};
#define SRP_OP_RECV (1 << 31)
enum srp_target_state {
SRP_TARGET_LIVE,
SRP_TARGET_CONNECTING,
@ -133,7 +130,8 @@ struct srp_target_port {
int path_query_id;
struct ib_cm_id *cm_id;
struct ib_cq *cq;
struct ib_cq *recv_cq;
struct ib_cq *send_cq;
struct ib_qp *qp;
int max_ti_iu_len;