IB/core: Move query port to ioctl

Add a method for query port under the uverbs global methods. Current
ib_port_attr struct is passed as a single attribute and port_cap_flags2 is
added as a new attribute to the function.

Signed-off-by: Michael Guralnik <[e-mail]>
Signed-off-by: Leon Romanovsky <[e-mail]>
Signed-off-by: Jason Gunthorpe <[e-mail]>

drivers/infiniband/core/uverbs.h

···
 extern const struct uverbs_object_def UVERBS_OBJECT(UVERBS_OBJECT_DM);
 extern const struct uverbs_object_def UVERBS_OBJECT(UVERBS_OBJECT_COUNTERS);
 
+/*
+ * ib_uverbs_query_port_resp.port_cap_flags started out as just a copy of the
+ * PortInfo CapabilityMask, but was extended with unique bits.
+ */
+static inline u32 make_port_cap_flags(const struct ib_port_attr *attr)
+{
+	u32 res;
+
+	/* All IBA CapabilityMask bits are passed through here, except bit 26,
+	 * which is overridden with IP_BASED_GIDS. This is due to a historical
+	 * mistake in the implementation of IP_BASED_GIDS. Otherwise all other
+	 * bits match the IBA definition across all kernel versions.
+	 */
+	res = attr->port_cap_flags & ~(u32)IB_UVERBS_PCF_IP_BASED_GIDS;
+
+	if (attr->ip_gids)
+		res |= IB_UVERBS_PCF_IP_BASED_GIDS;
+
+	return res;
+}
+
+
+void copy_port_attr_to_resp(struct ib_port_attr *attr,
+			    struct ib_uverbs_query_port_resp *resp,
+			    struct ib_device *ib_dev, u8 port_num);
 #endif /* UVERBS_H */

drivers/infiniband/core/uverbs_cmd.c

···
 	return uverbs_response(attrs, &resp, sizeof(resp));
 }
 
-/*
- * ib_uverbs_query_port_resp.port_cap_flags started out as just a copy of the
- * PortInfo CapabilityMask, but was extended with unique bits.
- */
-static u32 make_port_cap_flags(const struct ib_port_attr *attr)
-{
-	u32 res;
-
-	/* All IBA CapabilityMask bits are passed through here, except bit 26,
-	 * which is overridden with IP_BASED_GIDS. This is due to a historical
-	 * mistake in the implementation of IP_BASED_GIDS. Otherwise all other
-	 * bits match the IBA definition across all kernel versions.
-	 */
-	res = attr->port_cap_flags & ~(u32)IB_UVERBS_PCF_IP_BASED_GIDS;
-
-	if (attr->ip_gids)
-		res |= IB_UVERBS_PCF_IP_BASED_GIDS;
-
-	return res;
-}
-
 static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs)
 {
 	struct ib_uverbs_query_port      cmd;
···
 		return ret;
 
 	memset(&resp, 0, sizeof resp);
-
-	resp.state 	     = attr.state;
-	resp.max_mtu 	     = attr.max_mtu;
-	resp.active_mtu      = attr.active_mtu;
-	resp.gid_tbl_len     = attr.gid_tbl_len;
-	resp.port_cap_flags  = make_port_cap_flags(&attr);
-	resp.max_msg_sz      = attr.max_msg_sz;
-	resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
-	resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
-	resp.pkey_tbl_len    = attr.pkey_tbl_len;
-
-	if (rdma_is_grh_required(ib_dev, cmd.port_num))
-		resp.flags |= IB_UVERBS_QPF_GRH_REQUIRED;
-
-	if (rdma_cap_opa_ah(ib_dev, cmd.port_num)) {
-		resp.lid     = OPA_TO_IB_UCAST_LID(attr.lid);
-		resp.sm_lid  = OPA_TO_IB_UCAST_LID(attr.sm_lid);
-	} else {
-		resp.lid     = ib_lid_cpu16(attr.lid);
-		resp.sm_lid  = ib_lid_cpu16(attr.sm_lid);
-	}
-	resp.lmc 	     = attr.lmc;
-	resp.max_vl_num      = attr.max_vl_num;
-	resp.sm_sl 	     = attr.sm_sl;
-	resp.subnet_timeout  = attr.subnet_timeout;
-	resp.init_type_reply = attr.init_type_reply;
-	resp.active_width    = attr.active_width;
-	resp.active_speed    = attr.active_speed;
-	resp.phys_state      = attr.phys_state;
-	resp.link_layer      = rdma_port_get_link_layer(ib_dev,
-							cmd.port_num);
+	copy_port_attr_to_resp(&attr, &resp, ib_dev, cmd.port_num);
 
 	return uverbs_response(attrs, &resp, sizeof(resp));
 }

drivers/infiniband/core/uverbs_std_types_device.c

···
 #include <rdma/uverbs_std_types.h>
 #include "rdma_core.h"
 #include "uverbs.h"
+#include <rdma/uverbs_ioctl.h>
+#include <rdma/opa_addr.h>
 
 /*
  * This ioctl method allows calling any defined write or write_ex
···
 	return ret;
 }
 
+void copy_port_attr_to_resp(struct ib_port_attr *attr,
+			    struct ib_uverbs_query_port_resp *resp,
+			    struct ib_device *ib_dev, u8 port_num)
+{
+	resp->state = attr->state;
+	resp->max_mtu = attr->max_mtu;
+	resp->active_mtu = attr->active_mtu;
+	resp->gid_tbl_len = attr->gid_tbl_len;
+	resp->port_cap_flags = make_port_cap_flags(attr);
+	resp->max_msg_sz = attr->max_msg_sz;
+	resp->bad_pkey_cntr = attr->bad_pkey_cntr;
+	resp->qkey_viol_cntr = attr->qkey_viol_cntr;
+	resp->pkey_tbl_len = attr->pkey_tbl_len;
+
+	if (rdma_is_grh_required(ib_dev, port_num))
+		resp->flags |= IB_UVERBS_QPF_GRH_REQUIRED;
+
+	if (rdma_cap_opa_ah(ib_dev, port_num)) {
+		resp->lid = OPA_TO_IB_UCAST_LID(attr->lid);
+		resp->sm_lid = OPA_TO_IB_UCAST_LID(attr->sm_lid);
+	} else {
+		resp->lid = ib_lid_cpu16(attr->lid);
+		resp->sm_lid = ib_lid_cpu16(attr->sm_lid);
+	}
+
+	resp->lmc = attr->lmc;
+	resp->max_vl_num = attr->max_vl_num;
+	resp->sm_sl = attr->sm_sl;
+	resp->subnet_timeout = attr->subnet_timeout;
+	resp->init_type_reply = attr->init_type_reply;
+	resp->active_width = attr->active_width;
+	resp->active_speed = attr->active_speed;
+	resp->phys_state = attr->phys_state;
+	resp->link_layer = rdma_port_get_link_layer(ib_dev, port_num);
+}
+
+static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_PORT)(
+	struct uverbs_attr_bundle *attrs)
+{
+	struct ib_device *ib_dev = attrs->ufile->device->ib_dev;
+	struct ib_port_attr attr = {};
+	struct ib_uverbs_query_port_resp_ex resp = {};
+	int ret;
+	u8 port_num;
+
+	/* FIXME: Extend the UAPI_DEF_OBJ_NEEDS_FN stuff.. */
+	if (!ib_dev->ops.query_port)
+		return -EOPNOTSUPP;
+
+	ret = uverbs_get_const(&port_num, attrs,
+			       UVERBS_ATTR_QUERY_PORT_PORT_NUM);
+	if (ret)
+		return ret;
+
+	ret = ib_query_port(ib_dev, port_num, &attr);
+	if (ret)
+		return ret;
+
+	copy_port_attr_to_resp(&attr, &resp.legacy_resp, ib_dev, port_num);
+	resp.port_cap_flags2 = attr.port_cap_flags2;
+
+	return uverbs_copy_to_struct_or_zero(attrs, UVERBS_ATTR_QUERY_PORT_RESP,
+					     &resp, sizeof(resp));
+}
+
 DECLARE_UVERBS_NAMED_METHOD(
 	UVERBS_METHOD_INFO_HANDLES,
 	/* Also includes any device specific object ids */
···
 	UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_INFO_HANDLES_LIST,
 			    UVERBS_ATTR_MIN_SIZE(sizeof(u32)), UA_OPTIONAL));
 
+DECLARE_UVERBS_NAMED_METHOD(
+	UVERBS_METHOD_QUERY_PORT,
+	UVERBS_ATTR_CONST_IN(UVERBS_ATTR_QUERY_PORT_PORT_NUM, u8, UA_MANDATORY),
+	UVERBS_ATTR_PTR_OUT(
+		UVERBS_ATTR_QUERY_PORT_RESP,
+		UVERBS_ATTR_STRUCT(struct ib_uverbs_query_port_resp_ex,
+				   reserved),
+		UA_MANDATORY));
+
 DECLARE_UVERBS_GLOBAL_METHODS(UVERBS_OBJECT_DEVICE,
 			      &UVERBS_METHOD(UVERBS_METHOD_INVOKE_WRITE),
-			      &UVERBS_METHOD(UVERBS_METHOD_INFO_HANDLES));
+			      &UVERBS_METHOD(UVERBS_METHOD_INFO_HANDLES),
+			      &UVERBS_METHOD(UVERBS_METHOD_QUERY_PORT));
 
 const struct uapi_definition uverbs_def_obj_device[] = {
 	UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_DEVICE),

include/uapi/rdma/ib_user_ioctl_cmds.h

···
 enum uverbs_methods_device {
 	UVERBS_METHOD_INVOKE_WRITE,
 	UVERBS_METHOD_INFO_HANDLES,
+	UVERBS_METHOD_QUERY_PORT,
 };
 
 enum uverbs_attrs_invoke_write_cmd_attr_ids {
 	UVERBS_ATTR_CORE_IN,
 	UVERBS_ATTR_CORE_OUT,
 	UVERBS_ATTR_WRITE_CMD,
+};
+
+enum uverbs_attrs_query_port_cmd_attr_ids {
+	UVERBS_ATTR_QUERY_PORT_PORT_NUM,
+	UVERBS_ATTR_QUERY_PORT_RESP,
 };
 
 enum uverbs_attrs_create_cq_cmd_attr_ids {
···
 enum uverbs_attrs_flow_destroy_ids {
 	UVERBS_ATTR_DESTROY_FLOW_HANDLE,
 };
+
 #endif

include/uapi/rdma/ib_user_ioctl_verbs.h

···
 #define IB_USER_IOCTL_VERBS_H
 
 #include <linux/types.h>
+#include <rdma/ib_user_verbs.h>
 
 #ifndef RDMA_UAPI_PTR
 #define RDMA_UAPI_PTR(_type, _name)	__aligned_u64 _name
···
 
 enum ib_uverbs_advise_mr_flag {
 	IB_UVERBS_ADVISE_MR_FLAG_FLUSH = 1 << 0,
+};
+
+struct ib_uverbs_query_port_resp_ex {
+	struct ib_uverbs_query_port_resp legacy_resp;
+	__u16 port_cap_flags2;
+	__u8  reserved[6];
 };
 
 #endif