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authorChristoph Hellwig <hch@lst.de>2015-10-08 09:16:33 +0100
committerChristoph Hellwig <hch@lst.de>2015-10-08 11:09:10 +0100
commite622f2f4ad2142d2a613a57fb85f8cf737935ef5 (patch)
tree19fa458bcaacf3f8b2f5e40676f748afc3df1e84 /include/rdma
parentb8cab5dab15ff5c2acc3faefdde28919b0341c11 (diff)
IB: split struct ib_send_wr
This patch split up struct ib_send_wr so that all non-trivial verbs use their own structure which embedds struct ib_send_wr. This dramaticly shrinks the size of a WR for most common operations: sizeof(struct ib_send_wr) (old): 96 sizeof(struct ib_send_wr): 48 sizeof(struct ib_rdma_wr): 64 sizeof(struct ib_atomic_wr): 96 sizeof(struct ib_ud_wr): 88 sizeof(struct ib_fast_reg_wr): 88 sizeof(struct ib_bind_mw_wr): 96 sizeof(struct ib_sig_handover_wr): 80 And with Sagi's pending MR rework the fast registration WR will also be down to a reasonable size: sizeof(struct ib_fastreg_wr): 64 Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com> [srp, srpt] Reviewed-by: Chuck Lever <chuck.lever@oracle.com> [sunrpc] Tested-by: Haggai Eran <haggaie@mellanox.com> Tested-by: Sagi Grimberg <sagig@mellanox.com> Tested-by: Steve Wise <swise@opengridcomputing.com>
Diffstat (limited to 'include/rdma')
-rw-r--r--include/rdma/ib_verbs.h130
1 files changed, 85 insertions, 45 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 7845fae6f2df..25f022c9aaac 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1100,54 +1100,94 @@ struct ib_send_wr {
__be32 imm_data;
u32 invalidate_rkey;
} ex;
- union {
- struct {
- u64 remote_addr;
- u32 rkey;
- } rdma;
- struct {
- u64 remote_addr;
- u64 compare_add;
- u64 swap;
- u64 compare_add_mask;
- u64 swap_mask;
- u32 rkey;
- } atomic;
- struct {
- struct ib_ah *ah;
- void *header;
- int hlen;
- int mss;
- u32 remote_qpn;
- u32 remote_qkey;
- u16 pkey_index; /* valid for GSI only */
- u8 port_num; /* valid for DR SMPs on switch only */
- } ud;
- struct {
- u64 iova_start;
- struct ib_fast_reg_page_list *page_list;
- unsigned int page_shift;
- unsigned int page_list_len;
- u32 length;
- int access_flags;
- u32 rkey;
- } fast_reg;
- struct {
- struct ib_mw *mw;
- /* The new rkey for the memory window. */
- u32 rkey;
- struct ib_mw_bind_info bind_info;
- } bind_mw;
- struct {
- struct ib_sig_attrs *sig_attrs;
- struct ib_mr *sig_mr;
- int access_flags;
- struct ib_sge *prot;
- } sig_handover;
- } wr;
u32 xrc_remote_srq_num; /* XRC TGT QPs only */
};
+struct ib_rdma_wr {
+ struct ib_send_wr wr;
+ u64 remote_addr;
+ u32 rkey;
+};
+
+static inline struct ib_rdma_wr *rdma_wr(struct ib_send_wr *wr)
+{
+ return container_of(wr, struct ib_rdma_wr, wr);
+}
+
+struct ib_atomic_wr {
+ struct ib_send_wr wr;
+ u64 remote_addr;
+ u64 compare_add;
+ u64 swap;
+ u64 compare_add_mask;
+ u64 swap_mask;
+ u32 rkey;
+};
+
+static inline struct ib_atomic_wr *atomic_wr(struct ib_send_wr *wr)
+{
+ return container_of(wr, struct ib_atomic_wr, wr);
+}
+
+struct ib_ud_wr {
+ struct ib_send_wr wr;
+ struct ib_ah *ah;
+ void *header;
+ int hlen;
+ int mss;
+ u32 remote_qpn;
+ u32 remote_qkey;
+ u16 pkey_index; /* valid for GSI only */
+ u8 port_num; /* valid for DR SMPs on switch only */
+};
+
+static inline struct ib_ud_wr *ud_wr(struct ib_send_wr *wr)
+{
+ return container_of(wr, struct ib_ud_wr, wr);
+}
+
+struct ib_fast_reg_wr {
+ struct ib_send_wr wr;
+ u64 iova_start;
+ struct ib_fast_reg_page_list *page_list;
+ unsigned int page_shift;
+ unsigned int page_list_len;
+ u32 length;
+ int access_flags;
+ u32 rkey;
+};
+
+static inline struct ib_fast_reg_wr *fast_reg_wr(struct ib_send_wr *wr)
+{
+ return container_of(wr, struct ib_fast_reg_wr, wr);
+}
+
+struct ib_bind_mw_wr {
+ struct ib_send_wr wr;
+ struct ib_mw *mw;
+ /* The new rkey for the memory window. */
+ u32 rkey;
+ struct ib_mw_bind_info bind_info;
+};
+
+static inline struct ib_bind_mw_wr *bind_mw_wr(struct ib_send_wr *wr)
+{
+ return container_of(wr, struct ib_bind_mw_wr, wr);
+}
+
+struct ib_sig_handover_wr {
+ struct ib_send_wr wr;
+ struct ib_sig_attrs *sig_attrs;
+ struct ib_mr *sig_mr;
+ int access_flags;
+ struct ib_sge *prot;
+};
+
+static inline struct ib_sig_handover_wr *sig_handover_wr(struct ib_send_wr *wr)
+{
+ return container_of(wr, struct ib_sig_handover_wr, wr);
+}
+
struct ib_recv_wr {
struct ib_recv_wr *next;
u64 wr_id;

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