[PATCH rdma-next 0/8] Add OPA extended LID support

[PATCH rdma-next 0/8] Add OPA extended LID support

[Dasaratharaman Chandramouli]

This patch series primarily increases sizes of variables that hold
lid values from 16 to 32 bits. Additionally, its add a check in
the IB mad stack to verify a properly formatted MAD when OPA
extended LIDs are used.

The patches are origanized as follows:

* Patch 1 converts an OPA ah_attr to an IB ah_attr when
  copying from kernel to user. Since OPA ah_attr is only defined
  in the kernel, the function takes care of adding OPA GIDs
  that contain the extended LID before copying to user.
* Patch 2 increases the lid and sm_lid variables in srpt
  to 32 bits.
* Patch 3 increases the local_lid variable in IPoIB to 32
  bits.
* Patch 4 increases the slid variable in MAD RMPP to 32 bits.
* Patch 5 increaes the lid field in struct ib_port_attr from
  16 to 32 bits.
* Patch 6 increases the sm_lid field in struct ib_port_attr
  from 16 to 32 bits.
* Patch 7 increases the slid field in struct ib_wc from 16
  to 32 bits.
* Patch 8 adds a check in IB mad to ensure a MAD payload is
  properly formatted when using extended LIDs.

Dasaratharaman Chandramouli (6):
  IB/core: Convert ah_attr from OPA to IB when copying to user
  IB/srpt: Increase lid and sm_lid to 32 bits
  IB/IPoIB: Increase local_lid to 32 bits
  IB/mad: Change slid in RMPP recv from 16 to 32 bits
  IB/core: Change port_attr.lid size from 16 to 32 bits
  IB/core: Change port_attr.sm_lid from 16 to 32 bits

Don Hiatt (2):
  IB/core: Change wc.slid from 16 to 32 bits
  IB/mad: Ensure DR MADs are correctly specified when using OPA devices

 drivers/infiniband/core/cm.c              |   4 +-
 drivers/infiniband/core/core_priv.h       |   1 +
 drivers/infiniband/core/mad.c             | 107 ++++++++++++++++++++++++++----
 drivers/infiniband/core/mad_rmpp.c        |   2 +-
 drivers/infiniband/core/ucm.c             |   2 +-
 drivers/infiniband/core/ucma.c            |  10 +--
 drivers/infiniband/core/user_mad.c        |   2 +-
 drivers/infiniband/core/uverbs_cmd.c      |  20 ++++--
 drivers/infiniband/core/uverbs_marshall.c |  41 ++++++++++--
 drivers/infiniband/hw/hfi1/mad.c          |   2 +-
 drivers/infiniband/hw/mlx4/alias_GUID.c   |   2 +-
 drivers/infiniband/hw/mlx4/mad.c          |   8 +--
 drivers/infiniband/hw/mlx5/mad.c          |   2 +-
 drivers/infiniband/hw/mthca/mthca_cmd.c   |   4 +-
 drivers/infiniband/hw/mthca/mthca_mad.c   |   4 +-
 drivers/infiniband/sw/rdmavt/cq.c         |   2 +-
 drivers/infiniband/ulp/ipoib/ipoib.h      |   2 +-
 drivers/infiniband/ulp/srpt/ib_srpt.h     |   4 +-
 include/rdma/ib_marshall.h                |   6 +-
 include/rdma/ib_verbs.h                   |   6 +-
 include/rdma/opa_addr.h                   |   3 +-
 21 files changed, 182 insertions(+), 52 deletions(-)

-- 
1.8.3.1

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[PATCH rdma-next 1/8] IB/core: Convert ah_attr from OPA to IB when copying to user

[Dasaratharaman Chandramouli]

OPA address handle atttibutes that have 32 bit LIDs would have to
be converted to IB address handle attribute with the LID field
programmed in the GID before copying to user space.

Reviewed-by: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Reviewed-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/core/ucm.c             |  2 +-
 drivers/infiniband/core/ucma.c            | 10 +++++---
 drivers/infiniband/core/uverbs_marshall.c | 41 +++++++++++++++++++++++++++----
 include/rdma/ib_marshall.h                |  6 +++--
 4 files changed, 47 insertions(+), 12 deletions(-)

diff --git a/drivers/infiniband/core/ucm.c b/drivers/infiniband/core/ucm.c
index 80d0fca..f9e8958 100644
--- a/drivers/infiniband/core/ucm.c
+++ b/drivers/infiniband/core/ucm.c
@@ -618,7 +618,7 @@ static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file,
 	if (result)
 		goto out;
 
-	ib_copy_qp_attr_to_user(&resp, &qp_attr);
+	ib_copy_qp_attr_to_user(ctx->cm_id->device, &resp, &qp_attr);
 
 	if (copy_to_user((void __user *)(unsigned long)cmd.response,
 			 &resp, sizeof(resp)))
diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
index 276f0ef..eb85b54 100644
--- a/drivers/infiniband/core/ucma.c
+++ b/drivers/infiniband/core/ucma.c
@@ -248,14 +248,15 @@ static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst,
 	dst->qp_num = src->qp_num;
 }
 
-static void ucma_copy_ud_event(struct rdma_ucm_ud_param *dst,
+static void ucma_copy_ud_event(struct ib_device *device,
+			       struct rdma_ucm_ud_param *dst,
 			       struct rdma_ud_param *src)
 {
 	if (src->private_data_len)
 		memcpy(dst->private_data, src->private_data,
 		       src->private_data_len);
 	dst->private_data_len = src->private_data_len;
-	ib_copy_ah_attr_to_user(&dst->ah_attr, &src->ah_attr);
+	ib_copy_ah_attr_to_user(device, &dst->ah_attr, &src->ah_attr);
 	dst->qp_num = src->qp_num;
 	dst->qkey = src->qkey;
 }
@@ -335,7 +336,8 @@ static int ucma_event_handler(struct rdma_cm_id *cm_id,
 	uevent->resp.event = event->event;
 	uevent->resp.status = event->status;
 	if (cm_id->qp_type == IB_QPT_UD)
-		ucma_copy_ud_event(&uevent->resp.param.ud, &event->param.ud);
+		ucma_copy_ud_event(cm_id->device, &uevent->resp.param.ud,
+				   &event->param.ud);
 	else
 		ucma_copy_conn_event(&uevent->resp.param.conn,
 				     &event->param.conn);
@@ -1157,7 +1159,7 @@ static ssize_t ucma_init_qp_attr(struct ucma_file *file,
 	if (ret)
 		goto out;
 
-	ib_copy_qp_attr_to_user(&resp, &qp_attr);
+	ib_copy_qp_attr_to_user(ctx->cm_id->device, &resp, &qp_attr);
 	if (copy_to_user((void __user *)(unsigned long)cmd.response,
 			 &resp, sizeof(resp)))
 		ret = -EFAULT;
diff --git a/drivers/infiniband/core/uverbs_marshall.c b/drivers/infiniband/core/uverbs_marshall.c
index 8b9587f..f738d69 100644
--- a/drivers/infiniband/core/uverbs_marshall.c
+++ b/drivers/infiniband/core/uverbs_marshall.c
@@ -33,10 +33,40 @@
 #include <linux/export.h>
 #include <rdma/ib_marshall.h>
 
-void ib_copy_ah_attr_to_user(struct ib_uverbs_ah_attr *dst,
-			     struct rdma_ah_attr *src)
+static int rdma_ah_conv_opa_to_ib(struct ib_device *dev,
+				  struct rdma_ah_attr *ib,
+				  struct rdma_ah_attr *opa)
 {
+	struct ib_port_attr port_attr;
+
+	if (ib_query_port(dev, opa->port_num, &port_attr))
+		return -EINVAL;
+
+	/* Do structure copy and the over-write fields */
+	*ib = *opa;
+
+	ib->type = RDMA_AH_ATTR_TYPE_IB;
+	rdma_ah_set_grh(ib, NULL, 0, 0, 1, 0);
+	rdma_ah_set_subnet_prefix(ib, cpu_to_be64(port_attr.subnet_prefix));
+	rdma_ah_set_interface_id(ib, OPA_MAKE_ID(rdma_ah_get_dlid(opa)));
+	return 0;
+}
+
+void ib_copy_ah_attr_to_user(struct ib_device *device,
+			     struct ib_uverbs_ah_attr *dst,
+			     struct rdma_ah_attr *ah_attr)
+{
+	struct rdma_ah_attr *src = ah_attr;
+	struct rdma_ah_attr conv_ah;
+
 	memset(&dst->grh.reserved, 0, sizeof(dst->grh.reserved));
+
+	if ((ah_attr->type == RDMA_AH_ATTR_TYPE_OPA) &&
+	    (rdma_ah_get_dlid(ah_attr) >=
+	     be16_to_cpu(IB_MULTICAST_LID_BASE)) &&
+	    (!rdma_ah_conv_opa_to_ib(device, &conv_ah, ah_attr)))
+		src = &conv_ah;
+
 	dst->dlid		   = rdma_ah_get_dlid(src);
 	dst->sl			   = rdma_ah_get_sl(src);
 	dst->src_path_bits	   = rdma_ah_get_path_bits(src);
@@ -57,7 +87,8 @@ void ib_copy_ah_attr_to_user(struct ib_uverbs_ah_attr *dst,
 }
 EXPORT_SYMBOL(ib_copy_ah_attr_to_user);
 
-void ib_copy_qp_attr_to_user(struct ib_uverbs_qp_attr *dst,
+void ib_copy_qp_attr_to_user(struct ib_device *device,
+			     struct ib_uverbs_qp_attr *dst,
 			     struct ib_qp_attr *src)
 {
 	dst->qp_state	        = src->qp_state;
@@ -76,8 +107,8 @@ void ib_copy_qp_attr_to_user(struct ib_uverbs_qp_attr *dst,
 	dst->max_recv_sge	= src->cap.max_recv_sge;
 	dst->max_inline_data	= src->cap.max_inline_data;
 
-	ib_copy_ah_attr_to_user(&dst->ah_attr, &src->ah_attr);
-	ib_copy_ah_attr_to_user(&dst->alt_ah_attr, &src->alt_ah_attr);
+	ib_copy_ah_attr_to_user(device, &dst->ah_attr, &src->ah_attr);
+	ib_copy_ah_attr_to_user(device, &dst->alt_ah_attr, &src->alt_ah_attr);
 
 	dst->pkey_index		= src->pkey_index;
 	dst->alt_pkey_index	= src->alt_pkey_index;
diff --git a/include/rdma/ib_marshall.h b/include/rdma/ib_marshall.h
index 68cef3b..8ebf84a 100644
--- a/include/rdma/ib_marshall.h
+++ b/include/rdma/ib_marshall.h
@@ -38,10 +38,12 @@
 #include <rdma/ib_user_verbs.h>
 #include <rdma/ib_user_sa.h>
 
-void ib_copy_qp_attr_to_user(struct ib_uverbs_qp_attr *dst,
+void ib_copy_qp_attr_to_user(struct ib_device *device,
+			     struct ib_uverbs_qp_attr *dst,
 			     struct ib_qp_attr *src);
 
-void ib_copy_ah_attr_to_user(struct ib_uverbs_ah_attr *dst,
+void ib_copy_ah_attr_to_user(struct ib_device *device,
+			     struct ib_uverbs_ah_attr *dst,
 			     struct rdma_ah_attr *src);
 
 void ib_copy_path_rec_to_user(struct ib_user_path_rec *dst,
-- 
1.8.3.1

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[PATCH rdma-next 2/8] IB/srpt: Increase lid and sm_lid to 32 bits

[Dasaratharaman Chandramouli]

srpt contains lid and sm_lid fields which are 16 bits in
length, increase them to 32 bits.

Reviewed-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/ulp/srpt/ib_srpt.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.h b/drivers/infiniband/ulp/srpt/ib_srpt.h
index cc118385..1b817e5 100644
--- a/drivers/infiniband/ulp/srpt/ib_srpt.h
+++ b/drivers/infiniband/ulp/srpt/ib_srpt.h
@@ -328,8 +328,8 @@ struct srpt_port {
 	u8			port_guid[24];
 	u8			port_gid[64];
 	u8			port;
-	u16			sm_lid;
-	u16			lid;
+	u32			sm_lid;
+	u32			lid;
 	union ib_gid		gid;
 	struct work_struct	work;
 	struct se_portal_group	port_guid_tpg;
-- 
1.8.3.1

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[PATCH rdma-next 3/8] IB/IPoIB: Increase local_lid to 32 bits

[Dasaratharaman Chandramouli]

IPoIB contains local_lid field which is 16 bits in
length, increase it to 32 bits.

Reviewed-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/ulp/ipoib/ipoib.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/ulp/ipoib/ipoib.h b/drivers/infiniband/ulp/ipoib/ipoib.h
index ff50a7b..9e73810 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib.h
+++ b/drivers/infiniband/ulp/ipoib/ipoib.h
@@ -366,7 +366,7 @@ struct ipoib_dev_priv {
 	u32		  qkey;
 
 	union ib_gid local_gid;
-	u16	     local_lid;
+	u32	     local_lid;
 
 	unsigned int admin_mtu;
 	unsigned int mcast_mtu;
-- 
1.8.3.1

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[PATCH rdma-next 4/8] IB/mad: Change slid in RMPP recv from 16 to 32 bits

[Dasaratharaman Chandramouli]

MAD RMPP contains slid field which is 16 bits in
length, increase it to 32 bits.

Reviewed-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/core/mad_rmpp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/core/mad_rmpp.c b/drivers/infiniband/core/mad_rmpp.c
index 0d3cca0..e5cf09c 100644
--- a/drivers/infiniband/core/mad_rmpp.c
+++ b/drivers/infiniband/core/mad_rmpp.c
@@ -64,7 +64,7 @@ struct mad_rmpp_recv {
 
 	__be64 tid;
 	u32 src_qp;
-	u16 slid;
+	u32 slid;
 	u8 mgmt_class;
 	u8 class_version;
 	u8 method;
-- 
1.8.3.1

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[PATCH rdma-next 5/8] IB/core: Change port_attr.lid size from 16 to 32 bits

[Dasaratharaman Chandramouli]

lid field in struct ib_port_attr is increased to 32 bits. This enables core
components to use larger LIDs if needed.
The user ABI is unchanged and return 16 bit values when queried.

Reviewed-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/core/core_priv.h     | 1 +
 drivers/infiniband/core/uverbs_cmd.c    | 5 ++++-
 drivers/infiniband/hw/mlx4/alias_GUID.c | 2 +-
 drivers/infiniband/hw/mlx4/mad.c        | 2 +-
 drivers/infiniband/hw/mthca/mthca_mad.c | 2 +-
 include/rdma/ib_verbs.h                 | 2 +-
 include/rdma/opa_addr.h                 | 3 ++-
 7 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/drivers/infiniband/core/core_priv.h b/drivers/infiniband/core/core_priv.h
index cb7d372..0919aeb 100644
--- a/drivers/infiniband/core/core_priv.h
+++ b/drivers/infiniband/core/core_priv.h
@@ -38,6 +38,7 @@
 #include <linux/cgroup_rdma.h>
 
 #include <rdma/ib_verbs.h>
+#include <rdma/opa_addr.h>
 
 #if IS_ENABLED(CONFIG_INFINIBAND_ADDR_TRANS_CONFIGFS)
 int cma_configfs_init(void);
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 70b7fb1..038b993 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -275,8 +275,11 @@ ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
 	resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
 	resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
 	resp.pkey_tbl_len    = attr.pkey_tbl_len;
-	resp.lid 	     = attr.lid;
 	resp.sm_lid 	     = attr.sm_lid;
+	if (rdma_cap_opa_ah(ib_dev, cmd.port_num))
+		resp.lid  = OPA_TO_IB_UCAST_LID(attr.lid);
+	else
+		resp.lid     = (u16)attr.lid;
 	resp.lmc 	     = attr.lmc;
 	resp.max_vl_num      = attr.max_vl_num;
 	resp.sm_sl 	     = attr.sm_sl;
diff --git a/drivers/infiniband/hw/mlx4/alias_GUID.c b/drivers/infiniband/hw/mlx4/alias_GUID.c
index ea24230..5a897b0 100644
--- a/drivers/infiniband/hw/mlx4/alias_GUID.c
+++ b/drivers/infiniband/hw/mlx4/alias_GUID.c
@@ -528,7 +528,7 @@ static int set_guid_rec(struct ib_device *ibdev,
 
 	memset(&guid_info_rec, 0, sizeof (struct ib_sa_guidinfo_rec));
 
-	guid_info_rec.lid = cpu_to_be16(attr.lid);
+	guid_info_rec.lid = cpu_to_be16((u16)attr.lid);
 	guid_info_rec.block_num = index;
 
 	memcpy(guid_info_rec.guid_info_list, rec_det->all_recs,
diff --git a/drivers/infiniband/hw/mlx4/mad.c b/drivers/infiniband/hw/mlx4/mad.c
index b469471..cd5bfe1 100644
--- a/drivers/infiniband/hw/mlx4/mad.c
+++ b/drivers/infiniband/hw/mlx4/mad.c
@@ -860,7 +860,7 @@ static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 	    in_mad->mad_hdr.method == IB_MGMT_METHOD_SET &&
 	    in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
 	    !ib_query_port(ibdev, port_num, &pattr))
-		prev_lid = pattr.lid;
+		prev_lid = (u16)pattr.lid;
 
 	err = mlx4_MAD_IFC(to_mdev(ibdev),
 			   (mad_flags & IB_MAD_IGNORE_MKEY ? MLX4_MAD_IFC_IGNORE_MKEY : 0) |
diff --git a/drivers/infiniband/hw/mthca/mthca_mad.c b/drivers/infiniband/hw/mthca/mthca_mad.c
index 7df3db7..617531f 100644
--- a/drivers/infiniband/hw/mthca/mthca_mad.c
+++ b/drivers/infiniband/hw/mthca/mthca_mad.c
@@ -256,7 +256,7 @@ int mthca_process_mad(struct ib_device *ibdev,
 	    in_mad->mad_hdr.method == IB_MGMT_METHOD_SET &&
 	    in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
 	    !ib_query_port(ibdev, port_num, &pattr))
-		prev_lid = pattr.lid;
+		prev_lid = (u16)pattr.lid;
 
 	err = mthca_MAD_IFC(to_mdev(ibdev),
 			    mad_flags & IB_MAD_IGNORE_MKEY,
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index f0cb490..42e0e10 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -548,8 +548,8 @@ struct ib_port_attr {
 	u32			bad_pkey_cntr;
 	u32			qkey_viol_cntr;
 	u16			pkey_tbl_len;
-	u16			lid;
 	u16			sm_lid;
+	u32			lid;
 	u8			lmc;
 	u8			max_vl_num;
 	u8			sm_sl;
diff --git a/include/rdma/opa_addr.h b/include/rdma/opa_addr.h
index eace28f..46d0567 100644
--- a/include/rdma/opa_addr.h
+++ b/include/rdma/opa_addr.h
@@ -50,7 +50,8 @@
 
 #define	OPA_SPECIAL_OUI		(0x00066AULL)
 #define OPA_MAKE_ID(x)          (cpu_to_be64(OPA_SPECIAL_OUI << 40 | (x)))
-
+#define OPA_TO_IB_UCAST_LID(x) (((x) >= be16_to_cpu(IB_MULTICAST_LID_BASE)) \
+				? 0 : x)
 /**
  * ib_is_opa_gid: Returns true if the top 24 bits of the gid
  * contains the OPA_STL_OUI identifier. This identifies that
-- 
1.8.3.1

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[PATCH rdma-next 6/8] IB/core: Change port_attr.sm_lid from 16 to 32 bits

[Dasaratharaman Chandramouli]

sm_lid field in struct ib_port_attr is increased to 32 bits. This
enables core components to use larger LIDs if needed.
The user ABI is unchanged and return 16 bit values when queried.

Reviewed-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/core/uverbs_cmd.c | 8 +++++---
 include/rdma/ib_verbs.h              | 2 +-
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 038b993..6964c05 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -275,11 +275,13 @@ ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
 	resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
 	resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
 	resp.pkey_tbl_len    = attr.pkey_tbl_len;
-	resp.sm_lid 	     = attr.sm_lid;
-	if (rdma_cap_opa_ah(ib_dev, cmd.port_num))
+	if (rdma_cap_opa_ah(ib_dev, cmd.port_num)) {
 		resp.lid  = OPA_TO_IB_UCAST_LID(attr.lid);
-	else
+		resp.sm_lid  = OPA_TO_IB_UCAST_LID(attr.sm_lid);
+	} else {
 		resp.lid     = (u16)attr.lid;
+		resp.sm_lid  = (u16)attr.sm_lid;
+	}
 	resp.lmc 	     = attr.lmc;
 	resp.max_vl_num      = attr.max_vl_num;
 	resp.sm_sl 	     = attr.sm_sl;
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 42e0e10..e161968 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -548,7 +548,7 @@ struct ib_port_attr {
 	u32			bad_pkey_cntr;
 	u32			qkey_viol_cntr;
 	u16			pkey_tbl_len;
-	u16			sm_lid;
+	u32			sm_lid;
 	u32			lid;
 	u8			lmc;
 	u8			max_vl_num;
-- 
1.8.3.1

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[PATCH rdma-next 7/8] IB/core: Change wc.slid from 16 to 32 bits

[Dasaratharaman Chandramouli]

From: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

slid field in struct ib_wc is increased to 32 bits.
This enables core components to use larger LIDs if needed.
The user ABI is unchanged and return 16 bit values when queried.

Reviewed-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/core/cm.c            |  4 ++--
 drivers/infiniband/core/user_mad.c      |  2 +-
 drivers/infiniband/core/uverbs_cmd.c    | 11 ++++++++---
 drivers/infiniband/hw/hfi1/mad.c        |  2 +-
 drivers/infiniband/hw/mlx4/mad.c        |  6 +++---
 drivers/infiniband/hw/mlx5/mad.c        |  2 +-
 drivers/infiniband/hw/mthca/mthca_cmd.c |  4 ++--
 drivers/infiniband/hw/mthca/mthca_mad.c |  2 +-
 drivers/infiniband/sw/rdmavt/cq.c       |  2 +-
 include/rdma/ib_verbs.h                 |  2 +-
 10 files changed, 21 insertions(+), 16 deletions(-)

diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
index 1844770..6b3b0be 100644
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -1703,7 +1703,7 @@ static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc)
 {
 	if (!cm_req_get_primary_subnet_local(req_msg)) {
 		if (req_msg->primary_local_lid == IB_LID_PERMISSIVE) {
-			req_msg->primary_local_lid = cpu_to_be16(wc->slid);
+			req_msg->primary_local_lid = cpu_to_be16((u16)wc->slid);
 			cm_req_set_primary_sl(req_msg, wc->sl);
 		}
 
@@ -1713,7 +1713,7 @@ static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc)
 
 	if (!cm_req_get_alt_subnet_local(req_msg)) {
 		if (req_msg->alt_local_lid == IB_LID_PERMISSIVE) {
-			req_msg->alt_local_lid = cpu_to_be16(wc->slid);
+			req_msg->alt_local_lid = cpu_to_be16((u16)wc->slid);
 			cm_req_set_alt_sl(req_msg, wc->sl);
 		}
 
diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c
index 200422d..8272d65 100644
--- a/drivers/infiniband/core/user_mad.c
+++ b/drivers/infiniband/core/user_mad.c
@@ -229,7 +229,7 @@ static void recv_handler(struct ib_mad_agent *agent,
 	packet->mad.hdr.status	   = 0;
 	packet->mad.hdr.length	   = hdr_size(file) + mad_recv_wc->mad_len;
 	packet->mad.hdr.qpn	   = cpu_to_be32(mad_recv_wc->wc->src_qp);
-	packet->mad.hdr.lid	   = cpu_to_be16(mad_recv_wc->wc->slid);
+	packet->mad.hdr.lid	   = cpu_to_be16((u16)mad_recv_wc->wc->slid);
 	packet->mad.hdr.sl	   = mad_recv_wc->wc->sl;
 	packet->mad.hdr.path_bits  = mad_recv_wc->wc->dlid_path_bits;
 	packet->mad.hdr.pkey_index = mad_recv_wc->wc->pkey_index;
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 6964c05..b08045f 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -1190,7 +1190,8 @@ ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
 	return ret ? ret : in_len;
 }
 
-static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
+static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
+			   struct ib_wc *wc)
 {
 	struct ib_uverbs_wc tmp;
 
@@ -1204,7 +1205,11 @@ static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
 	tmp.src_qp		= wc->src_qp;
 	tmp.wc_flags		= wc->wc_flags;
 	tmp.pkey_index		= wc->pkey_index;
-	tmp.slid		= wc->slid;
+	if (rdma_cap_opa_ah(ib_dev, wc->port_num))
+		tmp.slid  = OPA_TO_IB_UCAST_LID(wc->slid);
+	else
+		tmp.slid  = (u16)wc->slid;
+	tmp.slid		= (u16)wc->slid;
 	tmp.sl			= wc->sl;
 	tmp.dlid_path_bits	= wc->dlid_path_bits;
 	tmp.port_num		= wc->port_num;
@@ -1248,7 +1253,7 @@ ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
 		if (!ret)
 			break;
 
-		ret = copy_wc_to_user(data_ptr, &wc);
+		ret = copy_wc_to_user(ib_dev, data_ptr, &wc);
 		if (ret)
 			goto out_put;
 
diff --git a/drivers/infiniband/hw/hfi1/mad.c b/drivers/infiniband/hw/hfi1/mad.c
index 5977673..345b40e 100644
--- a/drivers/infiniband/hw/hfi1/mad.c
+++ b/drivers/infiniband/hw/hfi1/mad.c
@@ -3958,7 +3958,7 @@ static int opa_local_smp_check(struct hfi1_ibport *ibp,
 			       const struct ib_wc *in_wc)
 {
 	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
-	u16 slid = in_wc->slid;
+	u16 slid = (u16)in_wc->slid;
 	u16 pkey;
 
 	if (in_wc->pkey_index >= ARRAY_SIZE(ppd->pkeys))
diff --git a/drivers/infiniband/hw/mlx4/mad.c b/drivers/infiniband/hw/mlx4/mad.c
index cd5bfe1..27b0cd9 100644
--- a/drivers/infiniband/hw/mlx4/mad.c
+++ b/drivers/infiniband/hw/mlx4/mad.c
@@ -169,7 +169,7 @@ int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int mad_ifc_flags,
 
 		op_modifier |= 0x4;
 
-		in_modifier |= in_wc->slid << 16;
+		in_modifier |= (u16)in_wc->slid << 16;
 	}
 
 	err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma, in_modifier,
@@ -625,7 +625,7 @@ int mlx4_ib_send_to_slave(struct mlx4_ib_dev *dev, int slave, u8 port,
 		memcpy((char *)&tun_mad->hdr.slid_mac_47_32, &(wc->smac[4]), 2);
 	} else {
 		tun_mad->hdr.sl_vid = cpu_to_be16(((u16)(wc->sl)) << 12);
-		tun_mad->hdr.slid_mac_47_32 = cpu_to_be16(wc->slid);
+		tun_mad->hdr.slid_mac_47_32 = cpu_to_be16((u16)wc->slid);
 	}
 
 	ib_dma_sync_single_for_device(&dev->ib_dev,
@@ -826,7 +826,7 @@ static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 		}
 	}
 
-	slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
+	slid = in_wc ? (u16)in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
 
 	if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) {
 		forward_trap(to_mdev(ibdev), port_num, in_mad);
diff --git a/drivers/infiniband/hw/mlx5/mad.c b/drivers/infiniband/hw/mlx5/mad.c
index f1b56de6..e867f84 100644
--- a/drivers/infiniband/hw/mlx5/mad.c
+++ b/drivers/infiniband/hw/mlx5/mad.c
@@ -78,7 +78,7 @@ static int process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 	u16 slid;
 	int err;
 
-	slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
+	slid = in_wc ? (u16)in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
 
 	if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0)
 		return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
diff --git a/drivers/infiniband/hw/mthca/mthca_cmd.c b/drivers/infiniband/hw/mthca/mthca_cmd.c
index 9d83a53..507fa19 100644
--- a/drivers/infiniband/hw/mthca/mthca_cmd.c
+++ b/drivers/infiniband/hw/mthca/mthca_cmd.c
@@ -1921,7 +1921,7 @@ int mthca_MAD_IFC(struct mthca_dev *dev, int ignore_mkey, int ignore_bkey,
 			(in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0);
 		MTHCA_PUT(inbox, val,               MAD_IFC_G_PATH_OFFSET);
 
-		MTHCA_PUT(inbox, in_wc->slid,       MAD_IFC_RLID_OFFSET);
+		MTHCA_PUT(inbox, (u16)in_wc->slid,       MAD_IFC_RLID_OFFSET);
 		MTHCA_PUT(inbox, in_wc->pkey_index, MAD_IFC_PKEY_OFFSET);
 
 		if (in_grh)
@@ -1929,7 +1929,7 @@ int mthca_MAD_IFC(struct mthca_dev *dev, int ignore_mkey, int ignore_bkey,
 
 		op_modifier |= 0x4;
 
-		in_modifier |= in_wc->slid << 16;
+		in_modifier |= (u16)in_wc->slid << 16;
 	}
 
 	err = mthca_cmd_box(dev, inmailbox->dma, outmailbox->dma,
diff --git a/drivers/infiniband/hw/mthca/mthca_mad.c b/drivers/infiniband/hw/mthca/mthca_mad.c
index 617531f..e6911ee 100644
--- a/drivers/infiniband/hw/mthca/mthca_mad.c
+++ b/drivers/infiniband/hw/mthca/mthca_mad.c
@@ -205,7 +205,7 @@ int mthca_process_mad(struct ib_device *ibdev,
 		      u16 *out_mad_pkey_index)
 {
 	int err;
-	u16 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
+	u16 slid = in_wc ? (u16)in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
 	u16 prev_lid = 0;
 	struct ib_port_attr pattr;
 	const struct ib_mad *in_mad = (const struct ib_mad *)in;
diff --git a/drivers/infiniband/sw/rdmavt/cq.c b/drivers/infiniband/sw/rdmavt/cq.c
index 0ae2ff8..c1e4fc5 100644
--- a/drivers/infiniband/sw/rdmavt/cq.c
+++ b/drivers/infiniband/sw/rdmavt/cq.c
@@ -107,7 +107,7 @@ void rvt_cq_enter(struct rvt_cq *cq, struct ib_wc *entry, bool solicited)
 		wc->uqueue[head].src_qp = entry->src_qp;
 		wc->uqueue[head].wc_flags = entry->wc_flags;
 		wc->uqueue[head].pkey_index = entry->pkey_index;
-		wc->uqueue[head].slid = entry->slid;
+		wc->uqueue[head].slid = (u16)entry->slid;
 		wc->uqueue[head].sl = entry->sl;
 		wc->uqueue[head].dlid_path_bits = entry->dlid_path_bits;
 		wc->uqueue[head].port_num = entry->port_num;
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index e161968..ad7cced 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -947,7 +947,7 @@ struct ib_wc {
 	u32			src_qp;
 	int			wc_flags;
 	u16			pkey_index;
-	u16			slid;
+	u32			slid;
 	u8			sl;
 	u8			dlid_path_bits;
 	u8			port_num;	/* valid only for DR SMPs on switches */
-- 
1.8.3.1

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[PATCH rdma-next 8/8] IB/mad: Ensure DR MADs are correctly specified when using OPA devices

[Dasaratharaman Chandramouli]

From: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

Pure DR MADs do not need OPA GIDs to be specified in the GRH since
they do not rely on LID information.

Reviewed-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/core/mad.c | 107 +++++++++++++++++++++++++++++++++++++-----
 1 file changed, 95 insertions(+), 12 deletions(-)

diff --git a/drivers/infiniband/core/mad.c b/drivers/infiniband/core/mad.c
index 192ee3da..3fffd3f8 100644
--- a/drivers/infiniband/core/mad.c
+++ b/drivers/infiniband/core/mad.c
@@ -41,6 +41,7 @@
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <rdma/ib_cache.h>
+#include <rdma/opa_addr.h>
 
 #include "mad_priv.h"
 #include "mad_rmpp.h"
@@ -732,6 +733,83 @@ static size_t mad_priv_dma_size(const struct ib_mad_private *mp)
 	return sizeof(struct ib_grh) + mp->mad_size;
 }
 
+static int verify_mad_ah(struct ib_mad_agent_private *mad_agent_priv,
+			 struct ib_mad_send_wr_private *mad_send_wr)
+{
+	struct ib_device *ib_dev = mad_agent_priv->qp_info->port_priv->device;
+	u8 port = mad_agent_priv->qp_info->port_priv->port_num;
+	struct ib_smp *smp = mad_send_wr->send_buf.mad;
+	struct opa_smp *opa_smp = (struct opa_smp *)smp;
+	struct rdma_ah_attr attr;
+	struct ib_global_route *grh;
+	u32 opa_drslid = be32_to_cpu(opa_smp->route.dr.dr_slid);
+	u32 opa_drdlid = be32_to_cpu(opa_smp->route.dr.dr_dlid);
+
+	bool dr_slid_is_permissive = (OPA_LID_PERMISSIVE ==
+				      opa_smp->route.dr.dr_slid) ? true : false;
+	bool dr_dlid_is_permissive = (OPA_LID_PERMISSIVE ==
+				      opa_smp->route.dr.dr_dlid) ? true : false;
+	bool drslid_is_ib_ucast = (opa_drslid <
+				   be16_to_cpu(IB_MULTICAST_LID_BASE)) ?
+					true : false;
+	bool drdlid_is_ib_ucast = (opa_drdlid <
+				   be16_to_cpu(IB_MULTICAST_LID_BASE)) ?
+					true : false;
+	bool drslid_is_ext = !drslid_is_ib_ucast && !dr_slid_is_permissive;
+	bool drdlid_is_ext = !drdlid_is_ib_ucast && !dr_dlid_is_permissive;
+	bool grh_present = false;
+	union ib_gid sgid;
+	int ret = 0;
+
+	ret = rdma_query_ah(mad_send_wr->send_buf.ah, &attr);
+	if (ret)
+		return ret;
+	grh_present = (rdma_ah_get_ah_flags(&attr) & IB_AH_GRH) ?
+			true : false;
+	if (grh_present) {
+		grh = rdma_ah_retrieve_grh(&attr);
+		ret = ib_query_gid(ib_dev, port, grh->sgid_index,
+				   &sgid, NULL);
+		if (ret)
+			return ret;
+	}
+
+	if (smp->class_version == OPA_SM_CLASS_VERSION) {
+		/*
+		 * Conditions when GRH info should not be specified
+		 * 1. both dr_slid and dr_dlid are permissve (Pure DR)
+		 * 2. both dr_slid and dr_dlid are less than 0xc000.
+		 *
+		 * Conditions when GRH info should be specified
+		 * 1. dr_dlid is not permissive and above 0xbfff
+		 * OR
+		 * 2. dr_slid is not permissive and above 0xbfff
+		 */
+		if (grh_present) {
+			if ((dr_slid_is_permissive &&
+			     dr_dlid_is_permissive) ||
+			     (drslid_is_ib_ucast && drdlid_is_ib_ucast))
+				if (ib_is_opa_gid(&grh->dgid) &&
+				    ib_is_opa_gid(&sgid))
+					return -EINVAL;
+			if (drslid_is_ext && !ib_is_opa_gid(&sgid))
+				return -EINVAL;
+			if (drdlid_is_ext &&
+			    !ib_is_opa_gid(&grh->dgid))
+				return -EINVAL;
+		} else { /* There is no GRH */
+			if (drslid_is_ext || drdlid_is_ext)
+				return -EINVAL;
+		}
+	} else {
+		if (grh_present)
+			if (ib_is_opa_gid(&grh->dgid) &&
+			    ib_is_opa_gid(&sgid))
+				return -EINVAL;
+	}
+	return ret;
+}
+
 /*
  * Return 0 if SMP is to be sent
  * Return 1 if SMP was consumed locally (whether or not solicited)
@@ -755,8 +833,12 @@ static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv,
 	size_t mad_size = port_mad_size(mad_agent_priv->qp_info->port_priv);
 	u16 out_mad_pkey_index = 0;
 	u16 drslid;
-	bool opa = rdma_cap_opa_mad(mad_agent_priv->qp_info->port_priv->device,
-				    mad_agent_priv->qp_info->port_priv->port_num);
+	bool opa_mad =
+		rdma_cap_opa_mad(mad_agent_priv->qp_info->port_priv->device,
+				 mad_agent_priv->qp_info->port_priv->port_num);
+	bool opa_ah =
+		rdma_cap_opa_ah(mad_agent_priv->qp_info->port_priv->device,
+				mad_agent_priv->qp_info->port_priv->port_num);
 
 	if (rdma_cap_ib_switch(device) &&
 	    smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
@@ -764,13 +846,21 @@ static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv,
 	else
 		port_num = mad_agent_priv->agent.port_num;
 
+	if (opa_mad && opa_ah) {
+		ret = verify_mad_ah(mad_agent_priv, mad_send_wr);
+		if (ret) {
+			dev_err(&device->dev,
+				"Error verifying MAD format\n");
+			goto out;
+		}
+	}
 	/*
 	 * Directed route handling starts if the initial LID routed part of
 	 * a request or the ending LID routed part of a response is empty.
 	 * If we are at the start of the LID routed part, don't update the
 	 * hop_ptr or hop_cnt.  See section 14.2.2, Vol 1 IB spec.
 	 */
-	if (opa && smp->class_version == OPA_SM_CLASS_VERSION) {
+	if (opa_mad && smp->class_version == OPA_SM_CLASS_VERSION) {
 		u32 opa_drslid;
 
 		if ((opa_get_smp_direction(opa_smp)
@@ -784,13 +874,6 @@ static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv,
 			goto out;
 		}
 		opa_drslid = be32_to_cpu(opa_smp->route.dr.dr_slid);
-		if (opa_drslid != be32_to_cpu(OPA_LID_PERMISSIVE) &&
-		    opa_drslid & 0xffff0000) {
-			ret = -EINVAL;
-			dev_err(&device->dev, "OPA Invalid dr_slid 0x%x\n",
-			       opa_drslid);
-			goto out;
-		}
 		drslid = (u16)(opa_drslid & 0x0000ffff);
 
 		/* Check to post send on QP or process locally */
@@ -833,7 +916,7 @@ static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv,
 		     send_wr->pkey_index,
 		     send_wr->port_num, &mad_wc);
 
-	if (opa && smp->base_version == OPA_MGMT_BASE_VERSION) {
+	if (opa_mad && smp->base_version == OPA_MGMT_BASE_VERSION) {
 		mad_wc.byte_len = mad_send_wr->send_buf.hdr_len
 					+ mad_send_wr->send_buf.data_len
 					+ sizeof(struct ib_grh);
@@ -890,7 +973,7 @@ static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv,
 	}
 
 	local->mad_send_wr = mad_send_wr;
-	if (opa) {
+	if (opa_mad) {
 		local->mad_send_wr->send_wr.pkey_index = out_mad_pkey_index;
 		local->return_wc_byte_len = mad_size;
 	}
-- 
1.8.3.1

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Re: [PATCH rdma-next 3/8] IB/IPoIB: Increase local_lid to 32 bits

[Yuval Shaia]

On Wed, May 10, 2017 at 07:22:51PM -0400, Dasaratharaman Chandramouli wrote:
> IPoIB contains local_lid field which is 16 bits in
> length, increase it to 32 bits.

Is it IPoIB thing only? i see it also in struct ib_wc

> 
> Reviewed-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> Signed-off-by: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> ---
>  drivers/infiniband/ulp/ipoib/ipoib.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/infiniband/ulp/ipoib/ipoib.h b/drivers/infiniband/ulp/ipoib/ipoib.h
> index ff50a7b..9e73810 100644
> --- a/drivers/infiniband/ulp/ipoib/ipoib.h
> +++ b/drivers/infiniband/ulp/ipoib/ipoib.h
> @@ -366,7 +366,7 @@ struct ipoib_dev_priv {
>  	u32		  qkey;
>  
>  	union ib_gid local_gid;
> -	u16	     local_lid;
> +	u32	     local_lid;
>  
>  	unsigned int admin_mtu;
>  	unsigned int mcast_mtu;
> -- 
> 1.8.3.1
> 
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Re: [PATCH rdma-next 3/8] IB/IPoIB: Increase local_lid to 32 bits

[Yuval Shaia]

On Thu, May 11, 2017 at 11:41:26AM +0300, Yuval Shaia wrote:
> On Wed, May 10, 2017 at 07:22:51PM -0400, Dasaratharaman Chandramouli wrote:
> > IPoIB contains local_lid field which is 16 bits in
> > length, increase it to 32 bits.
> 
> Is it IPoIB thing only? i see it also in struct ib_wc

Sorry, please ignore this question.

Reviewed-by: Yuval Shaia <yuval.shaia-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>


> 
> > 
> > Reviewed-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> > Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> > Signed-off-by: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> > ---
> >  drivers/infiniband/ulp/ipoib/ipoib.h | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/infiniband/ulp/ipoib/ipoib.h b/drivers/infiniband/ulp/ipoib/ipoib.h
> > index ff50a7b..9e73810 100644
> > --- a/drivers/infiniband/ulp/ipoib/ipoib.h
> > +++ b/drivers/infiniband/ulp/ipoib/ipoib.h
> > @@ -366,7 +366,7 @@ struct ipoib_dev_priv {
> >  	u32		  qkey;
> >  
> >  	union ib_gid local_gid;
> > -	u16	     local_lid;
> > +	u32	     local_lid;
> >  
> >  	unsigned int admin_mtu;
> >  	unsigned int mcast_mtu;
> > -- 
> > 1.8.3.1
> > 
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
> > the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
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> --
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Re: [PATCH rdma-next 7/8] IB/core: Change wc.slid from 16 to 32 bits

[Hal Rosenstock]

On 5/10/2017 7:22 PM, Dasaratharaman Chandramouli wrote:
> From: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> 
> slid field in struct ib_wc is increased to 32 bits.
> This enables core components to use larger LIDs if needed.
> The user ABI is unchanged and return 16 bit values when queried.
> 
> Reviewed-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> Signed-off-by: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> ---
>  drivers/infiniband/core/cm.c            |  4 ++--
>  drivers/infiniband/core/user_mad.c      |  2 +-
>  drivers/infiniband/core/uverbs_cmd.c    | 11 ++++++++---
>  drivers/infiniband/hw/hfi1/mad.c        |  2 +-
>  drivers/infiniband/hw/mlx4/mad.c        |  6 +++---
>  drivers/infiniband/hw/mlx5/mad.c        |  2 +-
>  drivers/infiniband/hw/mthca/mthca_cmd.c |  4 ++--
>  drivers/infiniband/hw/mthca/mthca_mad.c |  2 +-
>  drivers/infiniband/sw/rdmavt/cq.c       |  2 +-
>  include/rdma/ib_verbs.h                 |  2 +-
>  10 files changed, 21 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
> index 1844770..6b3b0be 100644
> --- a/drivers/infiniband/core/cm.c
> +++ b/drivers/infiniband/core/cm.c
> @@ -1703,7 +1703,7 @@ static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc)
>  {
>  	if (!cm_req_get_primary_subnet_local(req_msg)) {
>  		if (req_msg->primary_local_lid == IB_LID_PERMISSIVE) {
> -			req_msg->primary_local_lid = cpu_to_be16(wc->slid);
> +			req_msg->primary_local_lid = cpu_to_be16((u16)wc->slid);
>  			cm_req_set_primary_sl(req_msg, wc->sl);
>  		}
>  
> @@ -1713,7 +1713,7 @@ static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc)
>  
>  	if (!cm_req_get_alt_subnet_local(req_msg)) {
>  		if (req_msg->alt_local_lid == IB_LID_PERMISSIVE) {
> -			req_msg->alt_local_lid = cpu_to_be16(wc->slid);
> +			req_msg->alt_local_lid = cpu_to_be16((u16)wc->slid);
>  			cm_req_set_alt_sl(req_msg, wc->sl);
>  		}
>  
> diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c
> index 200422d..8272d65 100644
> --- a/drivers/infiniband/core/user_mad.c
> +++ b/drivers/infiniband/core/user_mad.c
> @@ -229,7 +229,7 @@ static void recv_handler(struct ib_mad_agent *agent,
>  	packet->mad.hdr.status	   = 0;
>  	packet->mad.hdr.length	   = hdr_size(file) + mad_recv_wc->mad_len;
>  	packet->mad.hdr.qpn	   = cpu_to_be32(mad_recv_wc->wc->src_qp);
> -	packet->mad.hdr.lid	   = cpu_to_be16(mad_recv_wc->wc->slid);
> +	packet->mad.hdr.lid	   = cpu_to_be16((u16)mad_recv_wc->wc->slid);
>  	packet->mad.hdr.sl	   = mad_recv_wc->wc->sl;
>  	packet->mad.hdr.path_bits  = mad_recv_wc->wc->dlid_path_bits;
>  	packet->mad.hdr.pkey_index = mad_recv_wc->wc->pkey_index;
> diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
> index 6964c05..b08045f 100644
> --- a/drivers/infiniband/core/uverbs_cmd.c
> +++ b/drivers/infiniband/core/uverbs_cmd.c
> @@ -1190,7 +1190,8 @@ ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
>  	return ret ? ret : in_len;
>  }
>  
> -static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
> +static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
> +			   struct ib_wc *wc)
>  {
>  	struct ib_uverbs_wc tmp;
>  
> @@ -1204,7 +1205,11 @@ static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
>  	tmp.src_qp		= wc->src_qp;
>  	tmp.wc_flags		= wc->wc_flags;
>  	tmp.pkey_index		= wc->pkey_index;
> -	tmp.slid		= wc->slid;
> +	if (rdma_cap_opa_ah(ib_dev, wc->port_num))
> +		tmp.slid  = OPA_TO_IB_UCAST_LID(wc->slid);
> +	else
> +		tmp.slid  = (u16)wc->slid;
> +	tmp.slid		= (u16)wc->slid;

Is one line too many added here ?

-- Hal

>  	tmp.sl			= wc->sl;
>  	tmp.dlid_path_bits	= wc->dlid_path_bits;
>  	tmp.port_num		= wc->port_num;
> @@ -1248,7 +1253,7 @@ ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
>  		if (!ret)
>  			break;
>  
> -		ret = copy_wc_to_user(data_ptr, &wc);
> +		ret = copy_wc_to_user(ib_dev, data_ptr, &wc);
>  		if (ret)
>  			goto out_put;
>  
> diff --git a/drivers/infiniband/hw/hfi1/mad.c b/drivers/infiniband/hw/hfi1/mad.c
> index 5977673..345b40e 100644
> --- a/drivers/infiniband/hw/hfi1/mad.c
> +++ b/drivers/infiniband/hw/hfi1/mad.c
> @@ -3958,7 +3958,7 @@ static int opa_local_smp_check(struct hfi1_ibport *ibp,
>  			       const struct ib_wc *in_wc)
>  {
>  	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
> -	u16 slid = in_wc->slid;
> +	u16 slid = (u16)in_wc->slid;
>  	u16 pkey;
>  
>  	if (in_wc->pkey_index >= ARRAY_SIZE(ppd->pkeys))
> diff --git a/drivers/infiniband/hw/mlx4/mad.c b/drivers/infiniband/hw/mlx4/mad.c
> index cd5bfe1..27b0cd9 100644
> --- a/drivers/infiniband/hw/mlx4/mad.c
> +++ b/drivers/infiniband/hw/mlx4/mad.c
> @@ -169,7 +169,7 @@ int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int mad_ifc_flags,
>  
>  		op_modifier |= 0x4;
>  
> -		in_modifier |= in_wc->slid << 16;
> +		in_modifier |= (u16)in_wc->slid << 16;
>  	}
>  
>  	err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma, in_modifier,
> @@ -625,7 +625,7 @@ int mlx4_ib_send_to_slave(struct mlx4_ib_dev *dev, int slave, u8 port,
>  		memcpy((char *)&tun_mad->hdr.slid_mac_47_32, &(wc->smac[4]), 2);
>  	} else {
>  		tun_mad->hdr.sl_vid = cpu_to_be16(((u16)(wc->sl)) << 12);
> -		tun_mad->hdr.slid_mac_47_32 = cpu_to_be16(wc->slid);
> +		tun_mad->hdr.slid_mac_47_32 = cpu_to_be16((u16)wc->slid);
>  	}
>  
>  	ib_dma_sync_single_for_device(&dev->ib_dev,
> @@ -826,7 +826,7 @@ static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
>  		}
>  	}
>  
> -	slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
> +	slid = in_wc ? (u16)in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
>  
>  	if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) {
>  		forward_trap(to_mdev(ibdev), port_num, in_mad);
> diff --git a/drivers/infiniband/hw/mlx5/mad.c b/drivers/infiniband/hw/mlx5/mad.c
> index f1b56de6..e867f84 100644
> --- a/drivers/infiniband/hw/mlx5/mad.c
> +++ b/drivers/infiniband/hw/mlx5/mad.c
> @@ -78,7 +78,7 @@ static int process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
>  	u16 slid;
>  	int err;
>  
> -	slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
> +	slid = in_wc ? (u16)in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
>  
>  	if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0)
>  		return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
> diff --git a/drivers/infiniband/hw/mthca/mthca_cmd.c b/drivers/infiniband/hw/mthca/mthca_cmd.c
> index 9d83a53..507fa19 100644
> --- a/drivers/infiniband/hw/mthca/mthca_cmd.c
> +++ b/drivers/infiniband/hw/mthca/mthca_cmd.c
> @@ -1921,7 +1921,7 @@ int mthca_MAD_IFC(struct mthca_dev *dev, int ignore_mkey, int ignore_bkey,
>  			(in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0);
>  		MTHCA_PUT(inbox, val,               MAD_IFC_G_PATH_OFFSET);
>  
> -		MTHCA_PUT(inbox, in_wc->slid,       MAD_IFC_RLID_OFFSET);
> +		MTHCA_PUT(inbox, (u16)in_wc->slid,       MAD_IFC_RLID_OFFSET);
>  		MTHCA_PUT(inbox, in_wc->pkey_index, MAD_IFC_PKEY_OFFSET);
>  
>  		if (in_grh)
> @@ -1929,7 +1929,7 @@ int mthca_MAD_IFC(struct mthca_dev *dev, int ignore_mkey, int ignore_bkey,
>  
>  		op_modifier |= 0x4;
>  
> -		in_modifier |= in_wc->slid << 16;
> +		in_modifier |= (u16)in_wc->slid << 16;
>  	}
>  
>  	err = mthca_cmd_box(dev, inmailbox->dma, outmailbox->dma,
> diff --git a/drivers/infiniband/hw/mthca/mthca_mad.c b/drivers/infiniband/hw/mthca/mthca_mad.c
> index 617531f..e6911ee 100644
> --- a/drivers/infiniband/hw/mthca/mthca_mad.c
> +++ b/drivers/infiniband/hw/mthca/mthca_mad.c
> @@ -205,7 +205,7 @@ int mthca_process_mad(struct ib_device *ibdev,
>  		      u16 *out_mad_pkey_index)
>  {
>  	int err;
> -	u16 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
> +	u16 slid = in_wc ? (u16)in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
>  	u16 prev_lid = 0;
>  	struct ib_port_attr pattr;
>  	const struct ib_mad *in_mad = (const struct ib_mad *)in;
> diff --git a/drivers/infiniband/sw/rdmavt/cq.c b/drivers/infiniband/sw/rdmavt/cq.c
> index 0ae2ff8..c1e4fc5 100644
> --- a/drivers/infiniband/sw/rdmavt/cq.c
> +++ b/drivers/infiniband/sw/rdmavt/cq.c
> @@ -107,7 +107,7 @@ void rvt_cq_enter(struct rvt_cq *cq, struct ib_wc *entry, bool solicited)
>  		wc->uqueue[head].src_qp = entry->src_qp;
>  		wc->uqueue[head].wc_flags = entry->wc_flags;
>  		wc->uqueue[head].pkey_index = entry->pkey_index;
> -		wc->uqueue[head].slid = entry->slid;
> +		wc->uqueue[head].slid = (u16)entry->slid;
>  		wc->uqueue[head].sl = entry->sl;
>  		wc->uqueue[head].dlid_path_bits = entry->dlid_path_bits;
>  		wc->uqueue[head].port_num = entry->port_num;
> diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
> index e161968..ad7cced 100644
> --- a/include/rdma/ib_verbs.h
> +++ b/include/rdma/ib_verbs.h
> @@ -947,7 +947,7 @@ struct ib_wc {
>  	u32			src_qp;
>  	int			wc_flags;
>  	u16			pkey_index;
> -	u16			slid;
> +	u32			slid;
>  	u8			sl;
>  	u8			dlid_path_bits;
>  	u8			port_num;	/* valid only for DR SMPs on switches */
> 
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RE: [PATCH rdma-next 7/8] IB/core: Change wc.slid from 16 to 32 bits

[Hiatt, Don]

On 5/10/2017 7:22 PM, Dasaratharaman Chandramouli wrote:
> From: Don Hiatt <don.hiatt@intel.com>
> 
> slid field in struct ib_wc is increased to 32 bits.
> This enables core components to use larger LIDs if needed.
> The user ABI is unchanged and return 16 bit values when queried.
> 
> Reviewed-by: Ira Weiny <ira.weiny@intel.com>
> Signed-off-by: Dasaratharaman Chandramouli 
> <dasaratharaman.chandramouli@intel.com>
> Signed-off-by: Don Hiatt <don.hiatt@intel.com>
> ---
>  drivers/infiniband/core/cm.c            |  4 ++--
>  drivers/infiniband/core/user_mad.c      |  2 +-
>  drivers/infiniband/core/uverbs_cmd.c    | 11 ++++++++---
>  drivers/infiniband/hw/hfi1/mad.c        |  2 +-
>  drivers/infiniband/hw/mlx4/mad.c        |  6 +++---
>  drivers/infiniband/hw/mlx5/mad.c        |  2 +-
>  drivers/infiniband/hw/mthca/mthca_cmd.c |  4 ++--  
> drivers/infiniband/hw/mthca/mthca_mad.c |  2 +-
>  drivers/infiniband/sw/rdmavt/cq.c       |  2 +-
>  include/rdma/ib_verbs.h                 |  2 +-
>  10 files changed, 21 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/infiniband/core/cm.c 
> b/drivers/infiniband/core/cm.c index 1844770..6b3b0be 100644
> --- a/drivers/infiniband/core/cm.c
> +++ b/drivers/infiniband/core/cm.c
> @@ -1703,7 +1703,7 @@ static void cm_process_routed_req(struct 
> cm_req_msg *req_msg, struct ib_wc *wc)  {
>  	if (!cm_req_get_primary_subnet_local(req_msg)) {
>  		if (req_msg->primary_local_lid == IB_LID_PERMISSIVE) {
> -			req_msg->primary_local_lid = cpu_to_be16(wc->slid);
> +			req_msg->primary_local_lid = cpu_to_be16((u16)wc->slid);
>  			cm_req_set_primary_sl(req_msg, wc->sl);
>  		}
>  
> @@ -1713,7 +1713,7 @@ static void cm_process_routed_req(struct 
> cm_req_msg *req_msg, struct ib_wc *wc)
>  
>  	if (!cm_req_get_alt_subnet_local(req_msg)) {
>  		if (req_msg->alt_local_lid == IB_LID_PERMISSIVE) {
> -			req_msg->alt_local_lid = cpu_to_be16(wc->slid);
> +			req_msg->alt_local_lid = cpu_to_be16((u16)wc->slid);
>  			cm_req_set_alt_sl(req_msg, wc->sl);
>  		}
>  
> diff --git a/drivers/infiniband/core/user_mad.c 
> b/drivers/infiniband/core/user_mad.c
> index 200422d..8272d65 100644
> --- a/drivers/infiniband/core/user_mad.c
> +++ b/drivers/infiniband/core/user_mad.c
> @@ -229,7 +229,7 @@ static void recv_handler(struct ib_mad_agent *agent,
>  	packet->mad.hdr.status	   = 0;
>  	packet->mad.hdr.length	   = hdr_size(file) + mad_recv_wc->mad_len;
>  	packet->mad.hdr.qpn	   = cpu_to_be32(mad_recv_wc->wc->src_qp);
> -	packet->mad.hdr.lid	   = cpu_to_be16(mad_recv_wc->wc->slid);
> +	packet->mad.hdr.lid	   = cpu_to_be16((u16)mad_recv_wc->wc->slid);
>  	packet->mad.hdr.sl	   = mad_recv_wc->wc->sl;
>  	packet->mad.hdr.path_bits  = mad_recv_wc->wc->dlid_path_bits;
>  	packet->mad.hdr.pkey_index = mad_recv_wc->wc->pkey_index; diff --git 
> a/drivers/infiniband/core/uverbs_cmd.c 
> b/drivers/infiniband/core/uverbs_cmd.c
> index 6964c05..b08045f 100644
> --- a/drivers/infiniband/core/uverbs_cmd.c
> +++ b/drivers/infiniband/core/uverbs_cmd.c
> @@ -1190,7 +1190,8 @@ ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
>  	return ret ? ret : in_len;
>  }
>  
> -static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
> +static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
> +			   struct ib_wc *wc)
>  {
>  	struct ib_uverbs_wc tmp;
>  
> @@ -1204,7 +1205,11 @@ static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
>  	tmp.src_qp		= wc->src_qp;
>  	tmp.wc_flags		= wc->wc_flags;
>  	tmp.pkey_index		= wc->pkey_index;
> -	tmp.slid		= wc->slid;
> +	if (rdma_cap_opa_ah(ib_dev, wc->port_num))
> +		tmp.slid  = OPA_TO_IB_UCAST_LID(wc->slid);
> +	else
> +		tmp.slid  = (u16)wc->slid;
> +	tmp.slid		= (u16)wc->slid;

>>Is one line too many added here ?
>>
>>-- Hal

Yes there is. Thanks for catching this!

don

Re: [PATCH rdma-next 7/8] IB/core: Change wc.slid from 16 to 32 bits

[Leon Romanovsky]

[-- Attachment #1: Type: text/plain, Size: 9587 bytes --]

On Wed, May 10, 2017 at 07:22:55PM -0400, Dasaratharaman Chandramouli wrote:
> From: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
>
> slid field in struct ib_wc is increased to 32 bits.
> This enables core components to use larger LIDs if needed.
> The user ABI is unchanged and return 16 bit values when queried.
>
> Reviewed-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> Signed-off-by: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> ---
>  drivers/infiniband/core/cm.c            |  4 ++--
>  drivers/infiniband/core/user_mad.c      |  2 +-
>  drivers/infiniband/core/uverbs_cmd.c    | 11 ++++++++---
>  drivers/infiniband/hw/hfi1/mad.c        |  2 +-
>  drivers/infiniband/hw/mlx4/mad.c        |  6 +++---
>  drivers/infiniband/hw/mlx5/mad.c        |  2 +-
>  drivers/infiniband/hw/mthca/mthca_cmd.c |  4 ++--
>  drivers/infiniband/hw/mthca/mthca_mad.c |  2 +-
>  drivers/infiniband/sw/rdmavt/cq.c       |  2 +-
>  include/rdma/ib_verbs.h                 |  2 +-
>  10 files changed, 21 insertions(+), 16 deletions(-)

I disagree that casting from u32 to u16 in various places is right
thing to do. Please introduce simple common helper, with proper comment
on it and meaningful name and use it safely.

Thanks

>
> diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
> index 1844770..6b3b0be 100644
> --- a/drivers/infiniband/core/cm.c
> +++ b/drivers/infiniband/core/cm.c
> @@ -1703,7 +1703,7 @@ static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc)
>  {
>  	if (!cm_req_get_primary_subnet_local(req_msg)) {
>  		if (req_msg->primary_local_lid == IB_LID_PERMISSIVE) {
> -			req_msg->primary_local_lid = cpu_to_be16(wc->slid);
> +			req_msg->primary_local_lid = cpu_to_be16((u16)wc->slid);
>  			cm_req_set_primary_sl(req_msg, wc->sl);
>  		}
>
> @@ -1713,7 +1713,7 @@ static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc)
>
>  	if (!cm_req_get_alt_subnet_local(req_msg)) {
>  		if (req_msg->alt_local_lid == IB_LID_PERMISSIVE) {
> -			req_msg->alt_local_lid = cpu_to_be16(wc->slid);
> +			req_msg->alt_local_lid = cpu_to_be16((u16)wc->slid);
>  			cm_req_set_alt_sl(req_msg, wc->sl);
>  		}
>
> diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c
> index 200422d..8272d65 100644
> --- a/drivers/infiniband/core/user_mad.c
> +++ b/drivers/infiniband/core/user_mad.c
> @@ -229,7 +229,7 @@ static void recv_handler(struct ib_mad_agent *agent,
>  	packet->mad.hdr.status	   = 0;
>  	packet->mad.hdr.length	   = hdr_size(file) + mad_recv_wc->mad_len;
>  	packet->mad.hdr.qpn	   = cpu_to_be32(mad_recv_wc->wc->src_qp);
> -	packet->mad.hdr.lid	   = cpu_to_be16(mad_recv_wc->wc->slid);
> +	packet->mad.hdr.lid	   = cpu_to_be16((u16)mad_recv_wc->wc->slid);
>  	packet->mad.hdr.sl	   = mad_recv_wc->wc->sl;
>  	packet->mad.hdr.path_bits  = mad_recv_wc->wc->dlid_path_bits;
>  	packet->mad.hdr.pkey_index = mad_recv_wc->wc->pkey_index;
> diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
> index 6964c05..b08045f 100644
> --- a/drivers/infiniband/core/uverbs_cmd.c
> +++ b/drivers/infiniband/core/uverbs_cmd.c
> @@ -1190,7 +1190,8 @@ ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
>  	return ret ? ret : in_len;
>  }
>
> -static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
> +static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
> +			   struct ib_wc *wc)
>  {
>  	struct ib_uverbs_wc tmp;
>
> @@ -1204,7 +1205,11 @@ static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
>  	tmp.src_qp		= wc->src_qp;
>  	tmp.wc_flags		= wc->wc_flags;
>  	tmp.pkey_index		= wc->pkey_index;
> -	tmp.slid		= wc->slid;
> +	if (rdma_cap_opa_ah(ib_dev, wc->port_num))
> +		tmp.slid  = OPA_TO_IB_UCAST_LID(wc->slid);
> +	else
> +		tmp.slid  = (u16)wc->slid;
> +	tmp.slid		= (u16)wc->slid;
>  	tmp.sl			= wc->sl;
>  	tmp.dlid_path_bits	= wc->dlid_path_bits;
>  	tmp.port_num		= wc->port_num;
> @@ -1248,7 +1253,7 @@ ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
>  		if (!ret)
>  			break;
>
> -		ret = copy_wc_to_user(data_ptr, &wc);
> +		ret = copy_wc_to_user(ib_dev, data_ptr, &wc);
>  		if (ret)
>  			goto out_put;
>
> diff --git a/drivers/infiniband/hw/hfi1/mad.c b/drivers/infiniband/hw/hfi1/mad.c
> index 5977673..345b40e 100644
> --- a/drivers/infiniband/hw/hfi1/mad.c
> +++ b/drivers/infiniband/hw/hfi1/mad.c
> @@ -3958,7 +3958,7 @@ static int opa_local_smp_check(struct hfi1_ibport *ibp,
>  			       const struct ib_wc *in_wc)
>  {
>  	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
> -	u16 slid = in_wc->slid;
> +	u16 slid = (u16)in_wc->slid;
>  	u16 pkey;
>
>  	if (in_wc->pkey_index >= ARRAY_SIZE(ppd->pkeys))
> diff --git a/drivers/infiniband/hw/mlx4/mad.c b/drivers/infiniband/hw/mlx4/mad.c
> index cd5bfe1..27b0cd9 100644
> --- a/drivers/infiniband/hw/mlx4/mad.c
> +++ b/drivers/infiniband/hw/mlx4/mad.c
> @@ -169,7 +169,7 @@ int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int mad_ifc_flags,
>
>  		op_modifier |= 0x4;
>
> -		in_modifier |= in_wc->slid << 16;
> +		in_modifier |= (u16)in_wc->slid << 16;
>  	}
>
>  	err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma, in_modifier,
> @@ -625,7 +625,7 @@ int mlx4_ib_send_to_slave(struct mlx4_ib_dev *dev, int slave, u8 port,
>  		memcpy((char *)&tun_mad->hdr.slid_mac_47_32, &(wc->smac[4]), 2);
>  	} else {
>  		tun_mad->hdr.sl_vid = cpu_to_be16(((u16)(wc->sl)) << 12);
> -		tun_mad->hdr.slid_mac_47_32 = cpu_to_be16(wc->slid);
> +		tun_mad->hdr.slid_mac_47_32 = cpu_to_be16((u16)wc->slid);
>  	}
>
>  	ib_dma_sync_single_for_device(&dev->ib_dev,
> @@ -826,7 +826,7 @@ static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
>  		}
>  	}
>
> -	slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
> +	slid = in_wc ? (u16)in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
>
>  	if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) {
>  		forward_trap(to_mdev(ibdev), port_num, in_mad);
> diff --git a/drivers/infiniband/hw/mlx5/mad.c b/drivers/infiniband/hw/mlx5/mad.c
> index f1b56de6..e867f84 100644
> --- a/drivers/infiniband/hw/mlx5/mad.c
> +++ b/drivers/infiniband/hw/mlx5/mad.c
> @@ -78,7 +78,7 @@ static int process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
>  	u16 slid;
>  	int err;
>
> -	slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
> +	slid = in_wc ? (u16)in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
>
>  	if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0)
>  		return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
> diff --git a/drivers/infiniband/hw/mthca/mthca_cmd.c b/drivers/infiniband/hw/mthca/mthca_cmd.c
> index 9d83a53..507fa19 100644
> --- a/drivers/infiniband/hw/mthca/mthca_cmd.c
> +++ b/drivers/infiniband/hw/mthca/mthca_cmd.c
> @@ -1921,7 +1921,7 @@ int mthca_MAD_IFC(struct mthca_dev *dev, int ignore_mkey, int ignore_bkey,
>  			(in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0);
>  		MTHCA_PUT(inbox, val,               MAD_IFC_G_PATH_OFFSET);
>
> -		MTHCA_PUT(inbox, in_wc->slid,       MAD_IFC_RLID_OFFSET);
> +		MTHCA_PUT(inbox, (u16)in_wc->slid,       MAD_IFC_RLID_OFFSET);
>  		MTHCA_PUT(inbox, in_wc->pkey_index, MAD_IFC_PKEY_OFFSET);
>
>  		if (in_grh)
> @@ -1929,7 +1929,7 @@ int mthca_MAD_IFC(struct mthca_dev *dev, int ignore_mkey, int ignore_bkey,
>
>  		op_modifier |= 0x4;
>
> -		in_modifier |= in_wc->slid << 16;
> +		in_modifier |= (u16)in_wc->slid << 16;
>  	}
>
>  	err = mthca_cmd_box(dev, inmailbox->dma, outmailbox->dma,
> diff --git a/drivers/infiniband/hw/mthca/mthca_mad.c b/drivers/infiniband/hw/mthca/mthca_mad.c
> index 617531f..e6911ee 100644
> --- a/drivers/infiniband/hw/mthca/mthca_mad.c
> +++ b/drivers/infiniband/hw/mthca/mthca_mad.c
> @@ -205,7 +205,7 @@ int mthca_process_mad(struct ib_device *ibdev,
>  		      u16 *out_mad_pkey_index)
>  {
>  	int err;
> -	u16 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
> +	u16 slid = in_wc ? (u16)in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
>  	u16 prev_lid = 0;
>  	struct ib_port_attr pattr;
>  	const struct ib_mad *in_mad = (const struct ib_mad *)in;
> diff --git a/drivers/infiniband/sw/rdmavt/cq.c b/drivers/infiniband/sw/rdmavt/cq.c
> index 0ae2ff8..c1e4fc5 100644
> --- a/drivers/infiniband/sw/rdmavt/cq.c
> +++ b/drivers/infiniband/sw/rdmavt/cq.c
> @@ -107,7 +107,7 @@ void rvt_cq_enter(struct rvt_cq *cq, struct ib_wc *entry, bool solicited)
>  		wc->uqueue[head].src_qp = entry->src_qp;
>  		wc->uqueue[head].wc_flags = entry->wc_flags;
>  		wc->uqueue[head].pkey_index = entry->pkey_index;
> -		wc->uqueue[head].slid = entry->slid;
> +		wc->uqueue[head].slid = (u16)entry->slid;
>  		wc->uqueue[head].sl = entry->sl;
>  		wc->uqueue[head].dlid_path_bits = entry->dlid_path_bits;
>  		wc->uqueue[head].port_num = entry->port_num;
> diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
> index e161968..ad7cced 100644
> --- a/include/rdma/ib_verbs.h
> +++ b/include/rdma/ib_verbs.h
> @@ -947,7 +947,7 @@ struct ib_wc {
>  	u32			src_qp;
>  	int			wc_flags;
>  	u16			pkey_index;
> -	u16			slid;
> +	u32			slid;
>  	u8			sl;
>  	u8			dlid_path_bits;
>  	u8			port_num;	/* valid only for DR SMPs on switches */
> --
> 1.8.3.1
>
> --
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Re: [PATCH rdma-next 7/8] IB/core: Change wc.slid from 16 to 32 bits

[Don Hiatt]

On 5/13/2017 3:55 AM, Leon Romanovsky wrote:
> On Wed, May 10, 2017 at 07:22:55PM -0400, Dasaratharaman Chandramouli wrote:
>> From: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
>>
>> slid field in struct ib_wc is increased to 32 bits.
>> This enables core components to use larger LIDs if needed.
>> The user ABI is unchanged and return 16 bit values when queried.
>>
>> Reviewed-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
>> Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
>> Signed-off-by: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
>> ---
>>   drivers/infiniband/core/cm.c            |  4 ++--
>>   drivers/infiniband/core/user_mad.c      |  2 +-
>>   drivers/infiniband/core/uverbs_cmd.c    | 11 ++++++++---
>>   drivers/infiniband/hw/hfi1/mad.c        |  2 +-
>>   drivers/infiniband/hw/mlx4/mad.c        |  6 +++---
>>   drivers/infiniband/hw/mlx5/mad.c        |  2 +-
>>   drivers/infiniband/hw/mthca/mthca_cmd.c |  4 ++--
>>   drivers/infiniband/hw/mthca/mthca_mad.c |  2 +-
>>   drivers/infiniband/sw/rdmavt/cq.c       |  2 +-
>>   include/rdma/ib_verbs.h                 |  2 +-
>>   10 files changed, 21 insertions(+), 16 deletions(-)
> 
> I disagree that casting from u32 to u16 in various places is right
> thing to do. Please introduce simple common helper, with proper comment
> on it and meaningful name and use it safely.
> 
> Thanks
> 
Hi Leon,

We'll introduce a helper function and post with the next patch revision.

Thank you.

don

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RE: [PATCH rdma-next 1/8] IB/core: Convert ah_attr from OPA to IB when copying to user

[Hefty, Sean]

> -void ib_copy_ah_attr_to_user(struct ib_uverbs_ah_attr *dst,
> -			     struct rdma_ah_attr *src)
> +static int rdma_ah_conv_opa_to_ib(struct ib_device *dev,
> +				  struct rdma_ah_attr *ib,
> +				  struct rdma_ah_attr *opa)
>  {
> +	struct ib_port_attr port_attr;
> +
> +	if (ib_query_port(dev, opa->port_num, &port_attr))
> +		return -EINVAL;
> +
> +	/* Do structure copy and the over-write fields */
> +	*ib = *opa;
> +
> +	ib->type = RDMA_AH_ATTR_TYPE_IB;
> +	rdma_ah_set_grh(ib, NULL, 0, 0, 1, 0);
> +	rdma_ah_set_subnet_prefix(ib,
> cpu_to_be64(port_attr.subnet_prefix));
> +	rdma_ah_set_interface_id(ib,
> OPA_MAKE_ID(rdma_ah_get_dlid(opa)));
> +	return 0;
> +}
> +
> +void ib_copy_ah_attr_to_user(struct ib_device *device,
> +			     struct ib_uverbs_ah_attr *dst,
> +			     struct rdma_ah_attr *ah_attr)
> +{
> +	struct rdma_ah_attr *src = ah_attr;
> +	struct rdma_ah_attr conv_ah;
> +
>  	memset(&dst->grh.reserved, 0, sizeof(dst->grh.reserved));
> +
> +	if ((ah_attr->type == RDMA_AH_ATTR_TYPE_OPA) &&
> +	    (rdma_ah_get_dlid(ah_attr) >=
> +	     be16_to_cpu(IB_MULTICAST_LID_BASE)) &&
> +	    (!rdma_ah_conv_opa_to_ib(device, &conv_ah, ah_attr)))

Doesn't a failure result in copying the wrong data to user space?  Can rdma_ah_conv_opa_to_ib() use some sort of default subnet prefix if query_port fails?

- Sean
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[PATCH rdma-next 1/8] IB/core: Convert ah_attr from OPA to IB when copying to user

[Don Hiatt]

From: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

OPA address handle atttibutes that have 32 bit LIDs would have to
be converted to IB address handle attribute with the LID field
programmed in the GID before copying to user space.

Reviewed-by: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Reviewed-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/core/ucm.c             |  2 +-
 drivers/infiniband/core/ucma.c            | 10 ++++---
 drivers/infiniband/core/uverbs_marshall.c | 48 +++++++++++++++++++++++++++----
 include/rdma/ib_marshall.h                |  6 ++--
 4 files changed, 54 insertions(+), 12 deletions(-)

diff --git a/drivers/infiniband/core/ucm.c b/drivers/infiniband/core/ucm.c
index 80d0fca..f9e8958 100644
--- a/drivers/infiniband/core/ucm.c
+++ b/drivers/infiniband/core/ucm.c
@@ -618,7 +618,7 @@ static ssize_t ib_ucm_init_qp_attr(struct ib_ucm_file *file,
 	if (result)
 		goto out;
 
-	ib_copy_qp_attr_to_user(&resp, &qp_attr);
+	ib_copy_qp_attr_to_user(ctx->cm_id->device, &resp, &qp_attr);
 
 	if (copy_to_user((void __user *)(unsigned long)cmd.response,
 			 &resp, sizeof(resp)))
diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
index 276f0ef..eb85b54 100644
--- a/drivers/infiniband/core/ucma.c
+++ b/drivers/infiniband/core/ucma.c
@@ -248,14 +248,15 @@ static void ucma_copy_conn_event(struct rdma_ucm_conn_param *dst,
 	dst->qp_num = src->qp_num;
 }
 
-static void ucma_copy_ud_event(struct rdma_ucm_ud_param *dst,
+static void ucma_copy_ud_event(struct ib_device *device,
+			       struct rdma_ucm_ud_param *dst,
 			       struct rdma_ud_param *src)
 {
 	if (src->private_data_len)
 		memcpy(dst->private_data, src->private_data,
 		       src->private_data_len);
 	dst->private_data_len = src->private_data_len;
-	ib_copy_ah_attr_to_user(&dst->ah_attr, &src->ah_attr);
+	ib_copy_ah_attr_to_user(device, &dst->ah_attr, &src->ah_attr);
 	dst->qp_num = src->qp_num;
 	dst->qkey = src->qkey;
 }
@@ -335,7 +336,8 @@ static int ucma_event_handler(struct rdma_cm_id *cm_id,
 	uevent->resp.event = event->event;
 	uevent->resp.status = event->status;
 	if (cm_id->qp_type == IB_QPT_UD)
-		ucma_copy_ud_event(&uevent->resp.param.ud, &event->param.ud);
+		ucma_copy_ud_event(cm_id->device, &uevent->resp.param.ud,
+				   &event->param.ud);
 	else
 		ucma_copy_conn_event(&uevent->resp.param.conn,
 				     &event->param.conn);
@@ -1157,7 +1159,7 @@ static ssize_t ucma_init_qp_attr(struct ucma_file *file,
 	if (ret)
 		goto out;
 
-	ib_copy_qp_attr_to_user(&resp, &qp_attr);
+	ib_copy_qp_attr_to_user(ctx->cm_id->device, &resp, &qp_attr);
 	if (copy_to_user((void __user *)(unsigned long)cmd.response,
 			 &resp, sizeof(resp)))
 		ret = -EFAULT;
diff --git a/drivers/infiniband/core/uverbs_marshall.c b/drivers/infiniband/core/uverbs_marshall.c
index 8b9587f..92a6475 100644
--- a/drivers/infiniband/core/uverbs_marshall.c
+++ b/drivers/infiniband/core/uverbs_marshall.c
@@ -33,10 +33,47 @@
 #include <linux/export.h>
 #include <rdma/ib_marshall.h>
 
-void ib_copy_ah_attr_to_user(struct ib_uverbs_ah_attr *dst,
-			     struct rdma_ah_attr *src)
+#define OPA_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL)
+static int rdma_ah_conv_opa_to_ib(struct ib_device *dev,
+				  struct rdma_ah_attr *ib,
+				  struct rdma_ah_attr *opa)
 {
+	struct ib_port_attr port_attr;
+	int ret = 0;
+
+	/* Do structure copy and the over-write fields */
+	*ib = *opa;
+
+	ib->type = RDMA_AH_ATTR_TYPE_IB;
+	rdma_ah_set_grh(ib, NULL, 0, 0, 1, 0);
+
+	if (ib_query_port(dev, opa->port_num, &port_attr)) {
+		/* Set to default subnet to indicate error */
+		rdma_ah_set_subnet_prefix(ib, OPA_DEFAULT_GID_PREFIX);
+		ret = -EINVAL;
+	} else {
+		rdma_ah_set_subnet_prefix(ib,
+					  cpu_to_be64(port_attr.subnet_prefix));
+	}
+	rdma_ah_set_interface_id(ib, OPA_MAKE_ID(rdma_ah_get_dlid(opa)));
+	return ret;
+}
+
+void ib_copy_ah_attr_to_user(struct ib_device *device,
+			     struct ib_uverbs_ah_attr *dst,
+			     struct rdma_ah_attr *ah_attr)
+{
+	struct rdma_ah_attr *src = ah_attr;
+	struct rdma_ah_attr conv_ah;
+
 	memset(&dst->grh.reserved, 0, sizeof(dst->grh.reserved));
+
+	if ((ah_attr->type == RDMA_AH_ATTR_TYPE_OPA) &&
+	    (rdma_ah_get_dlid(ah_attr) >=
+	     be16_to_cpu(IB_MULTICAST_LID_BASE)) &&
+	    (!rdma_ah_conv_opa_to_ib(device, &conv_ah, ah_attr)))
+		src = &conv_ah;
+
 	dst->dlid		   = rdma_ah_get_dlid(src);
 	dst->sl			   = rdma_ah_get_sl(src);
 	dst->src_path_bits	   = rdma_ah_get_path_bits(src);
@@ -57,7 +94,8 @@ void ib_copy_ah_attr_to_user(struct ib_uverbs_ah_attr *dst,
 }
 EXPORT_SYMBOL(ib_copy_ah_attr_to_user);
 
-void ib_copy_qp_attr_to_user(struct ib_uverbs_qp_attr *dst,
+void ib_copy_qp_attr_to_user(struct ib_device *device,
+			     struct ib_uverbs_qp_attr *dst,
 			     struct ib_qp_attr *src)
 {
 	dst->qp_state	        = src->qp_state;
@@ -76,8 +114,8 @@ void ib_copy_qp_attr_to_user(struct ib_uverbs_qp_attr *dst,
 	dst->max_recv_sge	= src->cap.max_recv_sge;
 	dst->max_inline_data	= src->cap.max_inline_data;
 
-	ib_copy_ah_attr_to_user(&dst->ah_attr, &src->ah_attr);
-	ib_copy_ah_attr_to_user(&dst->alt_ah_attr, &src->alt_ah_attr);
+	ib_copy_ah_attr_to_user(device, &dst->ah_attr, &src->ah_attr);
+	ib_copy_ah_attr_to_user(device, &dst->alt_ah_attr, &src->alt_ah_attr);
 
 	dst->pkey_index		= src->pkey_index;
 	dst->alt_pkey_index	= src->alt_pkey_index;
diff --git a/include/rdma/ib_marshall.h b/include/rdma/ib_marshall.h
index 68cef3b..8ebf84a 100644
--- a/include/rdma/ib_marshall.h
+++ b/include/rdma/ib_marshall.h
@@ -38,10 +38,12 @@
 #include <rdma/ib_user_verbs.h>
 #include <rdma/ib_user_sa.h>
 
-void ib_copy_qp_attr_to_user(struct ib_uverbs_qp_attr *dst,
+void ib_copy_qp_attr_to_user(struct ib_device *device,
+			     struct ib_uverbs_qp_attr *dst,
 			     struct ib_qp_attr *src);
 
-void ib_copy_ah_attr_to_user(struct ib_uverbs_ah_attr *dst,
+void ib_copy_ah_attr_to_user(struct ib_device *device,
+			     struct ib_uverbs_ah_attr *dst,
 			     struct rdma_ah_attr *src);
 
 void ib_copy_path_rec_to_user(struct ib_user_path_rec *dst,
-- 
1.8.3.1

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