Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (42 commits)
  IB/qib: Fix refcount leak in lkey/rkey validation
  IB/qib: Improve SERDES tunning on QMH boards
  IB/qib: Unnecessary delayed completions on RC connection
  IB/qib: Issue pre-emptive NAKs on eager buffer overflow
  IB/qib: RDMA lkey/rkey validation is inefficient for large MRs
  IB/qib: Change QPN increment
  IB/qib: Add fix missing from earlier patch
  IB/qib: Change receive queue/QPN selection
  IB/qib: Fix interrupt mitigation
  IB/qib: Avoid duplicate writes to the rcv head register
  IB/qib: Add a few new SERDES tunings
  IB/qib: Reset packet list after freeing
  IB/qib: New SERDES init routine and improvements to SI quality
  IB/qib: Clear WAIT_SEND flags when setting QP to error state
  IB/qib: Fix context allocation with multiple HCAs
  IB/qib: Fix multi-Florida HCA host panic on reboot
  IB/qib: Handle transitions from ACTIVE_DEFERRED to ACTIVE better
  IB/qib: UD send with immediate receive completion has wrong size
  IB/qib: Set port physical state even if other fields are invalid
  IB/qib: Generate completion callback on errors
  ...

1 files changed, 25 insertions, 21 deletions

diff --git a/drivers/infiniband/ulp/srp/ib_srp.h b/drivers/infiniband/ulp/srp/ib_srp.h
index ed0dce9e479f..9dc6fc3fd894 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.h
+++ b/drivers/infiniband/ulp/srp/ib_srp.h
@@ -59,16 +59,15 @@ enum {
 
 	SRP_RQ_SHIFT    	= 6,
 	SRP_RQ_SIZE		= 1 << SRP_RQ_SHIFT,
-	SRP_RQ_MASK		= SRP_RQ_SIZE - 1,
 
 	SRP_SQ_SIZE		= SRP_RQ_SIZE,
-	SRP_SQ_MASK		= SRP_SQ_SIZE - 1,
 	SRP_RSP_SQ_SIZE		= 1,
 	SRP_REQ_SQ_SIZE		= SRP_SQ_SIZE - SRP_RSP_SQ_SIZE,
 	SRP_TSK_MGMT_SQ_SIZE	= 1,
 	SRP_CMD_SQ_SIZE		= SRP_REQ_SQ_SIZE - SRP_TSK_MGMT_SQ_SIZE,
 
-	SRP_TAG_TSK_MGMT	= 1 << (SRP_RQ_SHIFT + 1),
+	SRP_TAG_NO_REQ		= ~0U,
+	SRP_TAG_TSK_MGMT	= 1U << 31,
 
 	SRP_FMR_SIZE		= 256,
 	SRP_FMR_POOL_SIZE	= 1024,
@@ -113,15 +112,29 @@ struct srp_request {
 	struct list_head	list;
 	struct scsi_cmnd       *scmnd;
 	struct srp_iu	       *cmd;
-	struct srp_iu	       *tsk_mgmt;
 	struct ib_pool_fmr     *fmr;
-	struct completion	done;
 	short			index;
-	u8			cmd_done;
-	u8			tsk_status;
 };
 
 struct srp_target_port {
+	/* These are RW in the hot path, and commonly used together */
+	struct list_head	free_tx;
+	struct list_head	free_reqs;
+	spinlock_t		lock;
+	s32			req_lim;
+
+	/* These are read-only in the hot path */
+	struct ib_cq	       *send_cq ____cacheline_aligned_in_smp;
+	struct ib_cq	       *recv_cq;
+	struct ib_qp	       *qp;
+	u32			lkey;
+	u32			rkey;
+	enum srp_target_state	state;
+
+	/* Everything above this point is used in the hot path of
+	 * command processing. Try to keep them packed into cachelines.
+	 */
+
 	__be64			id_ext;
 	__be64			ioc_guid;
 	__be64			service_id;
@@ -138,24 +151,13 @@ struct srp_target_port {
 	int			path_query_id;
 
 	struct ib_cm_id	       *cm_id;
-	struct ib_cq	       *recv_cq;
-	struct ib_cq	       *send_cq;
-	struct ib_qp	       *qp;
 
 	int			max_ti_iu_len;
-	s32			req_lim;
 
 	int			zero_req_lim;
 
-	unsigned		rx_head;
-	struct srp_iu	       *rx_ring[SRP_RQ_SIZE];
-
-	unsigned		tx_head;
-	unsigned		tx_tail;
 	struct srp_iu	       *tx_ring[SRP_SQ_SIZE];
-
-	struct list_head	free_reqs;
-	struct list_head	req_queue;
+	struct srp_iu	       *rx_ring[SRP_RQ_SIZE];
 	struct srp_request	req_ring[SRP_CMD_SQ_SIZE];
 
 	struct work_struct	work;
@@ -163,16 +165,18 @@ struct srp_target_port {
 	struct list_head	list;
 	struct completion	done;
 	int			status;
-	enum srp_target_state	state;
 	int			qp_in_error;
+
+	struct completion	tsk_mgmt_done;
+	u8			tsk_mgmt_status;
 };
 
 struct srp_iu {
+	struct list_head	list;
 	u64			dma;
 	void		       *buf;
 	size_t			size;
 	enum dma_data_direction	direction;
-	enum srp_iu_type	type;
 };
 
 #endif /* IB_SRP_H */