[IB] uverbs: Add ABI structures for more commands

Add kernel/user ABI structures for marshalling poll CQ, request CQ
notification, post send, post receive, post SRQ receive, create AH and
destroy AH commands.  These commands allow us to support userspace
verbs for devices that can't perform these operations directly from
userspace (eg the PathScale HCA).

Signed-off-by: Roland Dreier <rolandd@cisco.com>

include/rdma/ib_user_verbs.h

@@ -1,6 +1,7 @@
 /*
  * Copyright (c) 2005 Topspin Communications.  All rights reserved.
  * Copyright (c) 2005 Cisco Systems.  All rights reserved.
+ * Copyright (c) 2005 PathScale, Inc.  All rights reserved.
  *
  * This software is available to you under a choice of one of two
  * licenses.  You may choose to be licensed under the terms of the GNU
@@ -88,8 +89,11 @@ enum {
  * Make sure that all structs defined in this file remain laid out so
  * that they pack the same way on 32-bit and 64-bit architectures (to
  * avoid incompatibility between 32-bit userspace and 64-bit kernels).
- * In particular do not use pointer types -- pass pointers in __u64
- * instead.
+ * Specifically:
+ *  - Do not use pointer types -- pass pointers in __u64 instead.
+ *  - Make sure that any structure larger than 4 bytes is padded to a
+ *    multiple of 8 bytes.  Otherwise the structure size will be
+ *    different between 32-bit and 64-bit architectures.
  */
 
 struct ib_uverbs_async_event_desc {
@@ -261,6 +265,41 @@ struct ib_uverbs_create_cq_resp {
 	__u32 cqe;
 };
 
+struct ib_uverbs_poll_cq {
+	__u64 response;
+	__u32 cq_handle;
+	__u32 ne;
+};
+
+struct ib_uverbs_wc {
+	__u64 wr_id;
+	__u32 status;
+	__u32 opcode;
+	__u32 vendor_err;
+	__u32 byte_len;
+	__u32 imm_data;
+	__u32 qp_num;
+	__u32 src_qp;
+	__u32 wc_flags;
+	__u16 pkey_index;
+	__u16 slid;
+	__u8 sl;
+	__u8 dlid_path_bits;
+	__u8 port_num;
+	__u8 reserved;
+};
+
+struct ib_uverbs_poll_cq_resp {
+	__u32 count;
+	__u32 reserved;
+	struct ib_uverbs_wc wc[0];
+};
+
+struct ib_uverbs_req_notify_cq {
+	__u32 cq_handle;
+	__u32 solicited_only;
+};
+
 struct ib_uverbs_destroy_cq {
 	__u64 response;
 	__u32 cq_handle;
@@ -358,6 +397,127 @@ struct ib_uverbs_destroy_qp_resp {
 	__u32 events_reported;
 };
 
+/*
+ * The ib_uverbs_sge structure isn't used anywhere, since we assume
+ * the ib_sge structure is packed the same way on 32-bit and 64-bit
+ * architectures in both kernel and user space.  It's just here to
+ * document the ABI.
+ */
+struct ib_uverbs_sge {
+	__u64 addr;
+	__u32 length;
+	__u32 lkey;
+};
+
+struct ib_uverbs_send_wr {
+	__u64 wr_id; 
+	__u32 num_sge;
+	__u32 opcode;
+	__u32 send_flags;
+	__u32 imm_data;
+	union {
+		struct {
+			__u64 remote_addr;
+			__u32 rkey;
+			__u32 reserved;
+		} rdma;
+		struct {
+			__u64 remote_addr;
+			__u64 compare_add;
+			__u64 swap;
+			__u32 rkey;
+			__u32 reserved;
+		} atomic;
+		struct {
+			__u32 ah;
+			__u32 remote_qpn;
+			__u32 remote_qkey;
+			__u32 reserved;
+		} ud;
+	} wr;
+};
+
+struct ib_uverbs_post_send {
+	__u64 response;
+	__u32 qp_handle;
+	__u32 wr_count;
+	__u32 sge_count;
+	__u32 wqe_size;
+	struct ib_uverbs_send_wr send_wr[0];
+};
+
+struct ib_uverbs_post_send_resp {
+	__u32 bad_wr;
+};
+
+struct ib_uverbs_recv_wr {
+	__u64 wr_id;
+	__u32 num_sge;
+	__u32 reserved;
+};
+
+struct ib_uverbs_post_recv {
+	__u64 response;
+	__u32 qp_handle;
+	__u32 wr_count;
+	__u32 sge_count;
+	__u32 wqe_size;
+	struct ib_uverbs_recv_wr recv_wr[0];
+};
+
+struct ib_uverbs_post_recv_resp {
+	__u32 bad_wr;
+};
+
+struct ib_uverbs_post_srq_recv {
+	__u64 response;
+	__u32 srq_handle;
+	__u32 wr_count;
+	__u32 sge_count;
+	__u32 wqe_size;
+	struct ib_uverbs_recv_wr recv[0];
+};
+
+struct ib_uverbs_post_srq_recv_resp {
+	__u32 bad_wr;
+};
+
+struct ib_uverbs_global_route {
+	__u8  dgid[16];
+	__u32 flow_label;    
+	__u8  sgid_index;
+	__u8  hop_limit;
+	__u8  traffic_class;
+	__u8  reserved;
+};
+
+struct ib_uverbs_ah_attr {
+	struct ib_uverbs_global_route grh;
+	__u16 dlid;
+	__u8  sl;
+	__u8  src_path_bits;
+	__u8  static_rate;
+	__u8  is_global;
+	__u8  port_num;
+	__u8  reserved;
+};
+
+struct ib_uverbs_create_ah {
+	__u64 response;
+	__u64 user_handle;
+	__u32 pd_handle;
+	__u32 reserved;
+	struct ib_uverbs_ah_attr attr;
+};
+
+struct ib_uverbs_create_ah_resp {
+	__u32 ah_handle;
+};
+
+struct ib_uverbs_destroy_ah {
+	__u32 ah_handle;
+};
+
 struct ib_uverbs_attach_mcast {
 	__u8  gid[16];
 	__u32 qp_handle;