RDMA/bnxt_re: Add SRQ support for Broadcom adapters
Shared receive queue (SRQ) is defined as a pool of
receive buffers shared among multiple QPs which belong
to same protection domain in a given process context.
Use of SRQ reduces the memory foot print of IB applications.
Broadcom adapters support SRQ, adding code-changes to enable
shared receive queue.
Signed-off-by: Devesh Sharma <devesh.sharma@broadcom.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.h b/drivers/infiniband/hw/bnxt_re/qplib_fp.h
index c582d4e..211b27a 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_fp.h
+++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.h
@@ -39,6 +39,27 @@
#ifndef __BNXT_QPLIB_FP_H__
#define __BNXT_QPLIB_FP_H__
+struct bnxt_qplib_srq {
+ struct bnxt_qplib_pd *pd;
+ struct bnxt_qplib_dpi *dpi;
+ void __iomem *dbr_base;
+ u64 srq_handle;
+ u32 id;
+ u32 max_wqe;
+ u32 max_sge;
+ u32 threshold;
+ bool arm_req;
+ struct bnxt_qplib_cq *cq;
+ struct bnxt_qplib_hwq hwq;
+ struct bnxt_qplib_swq *swq;
+ struct scatterlist *sglist;
+ int start_idx;
+ int last_idx;
+ u32 nmap;
+ u16 eventq_hw_ring_id;
+ spinlock_t lock; /* protect SRQE link list */
+};
+
struct bnxt_qplib_sge {
u64 addr;
u32 lkey;
@@ -79,6 +100,7 @@ static inline u32 get_psne_idx(u32 val)
struct bnxt_qplib_swq {
u64 wr_id;
+ int next_idx;
u8 type;
u8 flags;
u32 start_psn;
@@ -404,29 +426,27 @@ struct bnxt_qplib_cq {
writel(NQ_DB_CP_FLAGS | ((raw_cons) & ((cp_bit) - 1)), db)
struct bnxt_qplib_nq {
- struct pci_dev *pdev;
+ struct pci_dev *pdev;
- int vector;
- cpumask_t mask;
- int budget;
- bool requested;
- struct tasklet_struct worker;
- struct bnxt_qplib_hwq hwq;
+ int vector;
+ cpumask_t mask;
+ int budget;
+ bool requested;
+ struct tasklet_struct worker;
+ struct bnxt_qplib_hwq hwq;
- u16 bar_reg;
- u16 bar_reg_off;
- u16 ring_id;
- void __iomem *bar_reg_iomem;
+ u16 bar_reg;
+ u16 bar_reg_off;
+ u16 ring_id;
+ void __iomem *bar_reg_iomem;
- int (*cqn_handler)
- (struct bnxt_qplib_nq *nq,
- struct bnxt_qplib_cq *cq);
- int (*srqn_handler)
- (struct bnxt_qplib_nq *nq,
- void *srq,
- u8 event);
- struct workqueue_struct *cqn_wq;
- char name[32];
+ int (*cqn_handler)(struct bnxt_qplib_nq *nq,
+ struct bnxt_qplib_cq *cq);
+ int (*srqn_handler)(struct bnxt_qplib_nq *nq,
+ struct bnxt_qplib_srq *srq,
+ u8 event);
+ struct workqueue_struct *cqn_wq;
+ char name[32];
};
struct bnxt_qplib_nq_work {
@@ -441,8 +461,18 @@ int bnxt_qplib_enable_nq(struct pci_dev *pdev, struct bnxt_qplib_nq *nq,
int (*cqn_handler)(struct bnxt_qplib_nq *nq,
struct bnxt_qplib_cq *cq),
int (*srqn_handler)(struct bnxt_qplib_nq *nq,
- void *srq,
+ struct bnxt_qplib_srq *srq,
u8 event));
+int bnxt_qplib_create_srq(struct bnxt_qplib_res *res,
+ struct bnxt_qplib_srq *srq);
+int bnxt_qplib_modify_srq(struct bnxt_qplib_res *res,
+ struct bnxt_qplib_srq *srq);
+int bnxt_qplib_query_srq(struct bnxt_qplib_res *res,
+ struct bnxt_qplib_srq *srq);
+int bnxt_qplib_destroy_srq(struct bnxt_qplib_res *res,
+ struct bnxt_qplib_srq *srq);
+int bnxt_qplib_post_srq_recv(struct bnxt_qplib_srq *srq,
+ struct bnxt_qplib_swqe *wqe);
int bnxt_qplib_create_qp1(struct bnxt_qplib_res *res, struct bnxt_qplib_qp *qp);
int bnxt_qplib_create_qp(struct bnxt_qplib_res *res, struct bnxt_qplib_qp *qp);
int bnxt_qplib_modify_qp(struct bnxt_qplib_res *res, struct bnxt_qplib_qp *qp);