[PATCH] IB: Add user-supplied context to userspace CM ABI

- Add user specified context to all uCM events.  Users will not retrieve
  any events associated with the context after destroying the corresponding
  cm_id.
- Provide the ib_cm_init_qp_attr() call to userspace clients of the CM.
  This call may be used to set QP attributes properly before modifying the QP.
- Fixes some error handling synchonization and cleanup issues.
- Performs some minor code cleanup.
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/core/ucm.h

 /*
  * Copyright (c) 2005 Topspin Communications.  All rights reserved.
+ * Copyright (c) 2005 Intel Corporation.  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
@@ -43,8 +44,6 @@
 #include <rdma/ib_cm.h>
 #include <rdma/ib_user_cm.h>
 
-#define IB_UCM_CM_ID_INVALID 0xffffffff
-
 struct ib_ucm_file {
 	struct semaphore mutex;
 	struct file *filp;
@@ -58,9 +57,11 @@ struct ib_ucm_context {
 	int                 id;
 	wait_queue_head_t   wait;
 	atomic_t            ref;
+	int		    events_reported;
 
 	struct ib_ucm_file *file;
 	struct ib_cm_id    *cm_id;
+	__u64		   uid;
 
 	struct list_head    events;    /* list of pending events. */
 	struct list_head    file_list; /* member in file ctx list */
@@ -71,16 +72,12 @@ struct ib_ucm_event {
 	struct list_head file_list; /* member in file event list */
 	struct list_head ctx_list;  /* member in ctx event list */
 
+	struct ib_cm_id *cm_id;
 	struct ib_ucm_event_resp resp;
 	void *data;
 	void *info;
 	int data_len;
 	int info_len;
-	/*
-	 * new connection identifiers needs to be saved until
-	 * userspace can get a handle on them.
-	 */
-	struct ib_cm_id *cm_id;
 };
 
 #endif /* UCM_H */

include/rdma/ib_user_cm.h

 /*
  * Copyright (c) 2005 Topspin Communications.  All rights reserved.
+ * Copyright (c) 2005 Intel Corporation.  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
@@ -37,7 +38,7 @@
 
 #include <linux/types.h>
 
-#define IB_USER_CM_ABI_VERSION 1
+#define IB_USER_CM_ABI_VERSION 2
 
 enum {
 	IB_USER_CM_CMD_CREATE_ID,
@@ -60,6 +61,7 @@ enum {
 	IB_USER_CM_CMD_SEND_SIDR_REP,
 
 	IB_USER_CM_CMD_EVENT,
+	IB_USER_CM_CMD_INIT_QP_ATTR,
 };
 /*
  * command ABI structures.
@@ -71,6 +73,7 @@ struct ib_ucm_cmd_hdr {
 };
 
 struct ib_ucm_create_id {
+	__u64 uid;
 	__u64 response;
 };
 
@@ -79,9 +82,14 @@ struct ib_ucm_create_id_resp {
 };
 
 struct ib_ucm_destroy_id {
+	__u64 response;
 	__u32 id;
 };
 
+struct ib_ucm_destroy_id_resp {
+	__u32 events_reported;
+};
+
 struct ib_ucm_attr_id {
 	__u64 response;
 	__u32 id;
@@ -94,6 +102,64 @@ struct ib_ucm_attr_id_resp {
 	__be32 remote_id;
 };
 
+struct ib_ucm_init_qp_attr {
+	__u64 response;
+	__u32 id;
+	__u32 qp_state;
+};
+
+struct ib_ucm_ah_attr {
+	__u8	grh_dgid[16];
+	__u32	grh_flow_label;
+	__u16	dlid;
+	__u16	reserved;
+	__u8	grh_sgid_index;
+	__u8	grh_hop_limit;
+	__u8	grh_traffic_class;
+	__u8	sl;
+	__u8	src_path_bits;
+	__u8	static_rate;
+	__u8	is_global;
+	__u8	port_num;
+};
+
+struct ib_ucm_init_qp_attr_resp {
+	__u32	qp_attr_mask;
+	__u32	qp_state;
+	__u32	cur_qp_state;
+	__u32	path_mtu;
+	__u32	path_mig_state;
+	__u32	qkey;
+	__u32	rq_psn;
+	__u32	sq_psn;
+	__u32	dest_qp_num;
+	__u32	qp_access_flags;
+
+	struct ib_ucm_ah_attr	ah_attr;
+	struct ib_ucm_ah_attr	alt_ah_attr;
+
+	/* ib_qp_cap */
+	__u32	max_send_wr;
+	__u32	max_recv_wr;
+	__u32	max_send_sge;
+	__u32	max_recv_sge;
+	__u32	max_inline_data;
+
+	__u16	pkey_index;
+	__u16	alt_pkey_index;
+	__u8	en_sqd_async_notify;
+	__u8	sq_draining;
+	__u8	max_rd_atomic;
+	__u8	max_dest_rd_atomic;
+	__u8	min_rnr_timer;
+	__u8	port_num;
+	__u8	timeout;
+	__u8	retry_cnt;
+	__u8	rnr_retry;
+	__u8	alt_port_num;
+	__u8	alt_timeout;
+};
+
 struct ib_ucm_listen {
 	__be64 service_id;
 	__be64 service_mask;
@@ -157,6 +223,7 @@ struct ib_ucm_req {
 };
 
 struct ib_ucm_rep {
+	__u64 uid;
 	__u64 data;
 	__u32 id;
 	__u32 qpn;
@@ -232,7 +299,6 @@ struct ib_ucm_event_get {
 };
 
 struct ib_ucm_req_event_resp {
-	__u32                  listen_id;
 	/* device */
 	/* port */
 	struct ib_ucm_path_rec primary_path;
@@ -287,7 +353,6 @@ struct ib_ucm_apr_event_resp {
 };
 
 struct ib_ucm_sidr_req_event_resp {
-	__u32 listen_id;
 	/* device */
 	/* port */
 	__u16 pkey;
@@ -307,6 +372,7 @@ struct ib_ucm_sidr_rep_event_resp {
 #define IB_UCM_PRES_ALTERNATE 0x08
 
 struct ib_ucm_event_resp {
+	__u64 uid;
 	__u32 id;
 	__u32 event;
 	__u32 present;