IB/rdmavt, hfi1, qib: Modify check_ah() to account for extended LIDs

rvt_check_ah() delegates lid verification to underlying
driver. Underlying driver uses different conditions to
check for dlid depending on whether the device supports
extended LIDs

Reviewed-by: Dennis Dalessandro <[e-mail]>
Signed-off-by: Dasaratharaman Chandramouli <[e-mail]>
Signed-off-by: Don Hiatt <[e-mail]>
Signed-off-by: Dennis Dalessandro <[e-mail]>
Signed-off-by: Doug Ledford <[e-mail]>

drivers/infiniband/hw/hfi1/common.h

···
 
 #define DEFAULT_P_KEY LIM_MGMT_P_KEY
 
-/**
- * 0xF8 - 4 bits of multicast range and 1 bit for collective range
- * Example: For 24 bit LID space,
- * Multicast range: 0xF00000 to 0xF7FFFF
- * Collective range: 0xF80000 to 0xFFFFFE
- */
-#define HFI1_MCAST_NR 0x4 /* Number of top bits set */
-#define HFI1_COLLECTIVE_NR 0x1 /* Number of bits after MCAST_NR */
-
 #define HFI1_PSM_IOC_BASE_SEQ 0x0
 
 static inline __u64 rhf_to_cpu(const __le32 *rbuf)

drivers/infiniband/hw/hfi1/mad.c

···
  */
 
 #include <linux/net.h>
+#include <rdma/opa_addr.h>
 #define OPA_NUM_PKEY_BLOCKS_PER_SMP (OPA_SMP_DR_DATA_SIZE \
 			/ (OPA_PARTITION_TABLE_BLK_SIZE * sizeof(u16)))
 
···
 	pi->buffer_units = cpu_to_be32(buffer_units);
 
 	pi->opa_cap_mask = cpu_to_be16(ibp->rvp.port_cap3_flags);
-	pi->collectivemask_multicastmask = ((HFI1_COLLECTIVE_NR & 0x7)
-					    << 3 | (HFI1_MCAST_NR & 0x7));
+	pi->collectivemask_multicastmask = ((OPA_COLLECTIVE_NR & 0x7)
+					    << 3 | (OPA_MCAST_NR & 0x7));
 
 	/* HFI supports a replay buffer 128 LTPs in size */
 	pi->replay_depth.buffer = 0x80;

drivers/infiniband/hw/hfi1/verbs.c

···
 #include <linux/rculist.h>
 #include <linux/mm.h>
 #include <linux/vmalloc.h>
+#include <rdma/opa_addr.h>
 
 #include "hfi.h"
 #include "common.h"
···
 	struct hfi1_pportdata *ppd;
 	struct hfi1_devdata *dd;
 	u8 sc5;
+
+	if (hfi1_check_mcast(rdma_ah_get_dlid(ah_attr)) &&
+	    !(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH))
+		return -EINVAL;
 
 	/* test the mapping for validity */
 	ibp = to_iport(ibdev, rdma_ah_get_port_num(ah_attr));

drivers/infiniband/hw/qib/qib_verbs.c

···
 	if (rdma_ah_get_sl(ah_attr) > 15)
 		return -EINVAL;
 
+	if (rdma_ah_get_dlid(ah_attr) == 0)
+		return -EINVAL;
+	if (rdma_ah_get_dlid(ah_attr) >=
+		be16_to_cpu(IB_MULTICAST_LID_BASE) &&
+	    rdma_ah_get_dlid(ah_attr) !=
+		be16_to_cpu(IB_LID_PERMISSIVE) &&
+	    !(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH))
+		return -EINVAL;
+
 	return 0;
 }
 

drivers/infiniband/sw/rdmavt/ah.c

···
 	int port_num = rdma_ah_get_port_num(ah_attr);
 	struct ib_port_attr port_attr;
 	struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
-	enum rdma_link_layer link = rdma_port_get_link_layer(ibdev, port_num);
-	u32 dlid = rdma_ah_get_dlid(ah_attr);
 	u8 ah_flags = rdma_ah_get_ah_flags(ah_attr);
 	u8 static_rate = rdma_ah_get_static_rate(ah_attr);
 
···
 	if ((ah_flags & IB_AH_GRH) &&
 	    rdma_ah_read_grh(ah_attr)->sgid_index >= port_attr.gid_tbl_len)
 		return -EINVAL;
-	if (link != IB_LINK_LAYER_ETHERNET) {
-		if (dlid == 0)
-			return -EINVAL;
-		if (dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE) &&
-		    dlid != be16_to_cpu(IB_LID_PERMISSIVE) &&
-		    !(ah_flags & IB_AH_GRH))
-			return -EINVAL;
-	}
 	if (rdi->driver_f.check_ah)
 		return rdi->driver_f.check_ah(ibdev, ah_attr);
 	return 0;

drivers/infiniband/sw/rdmavt/qp.c

···
 #include <linux/slab.h>
 #include <rdma/ib_verbs.h>
 #include <rdma/ib_hdrs.h>
+#include <rdma/opa_addr.h>
 #include "qp.h"
 #include "vt.h"
 #include "trace.h"
···
 	int mig = 0;
 	int pmtu = 0; /* for gcc warning only */
 	enum rdma_link_layer link;
+	int opa_ah;
 
 	link = rdma_port_get_link_layer(ibqp->device, qp->port_num);
 
···
 	cur_state = attr_mask & IB_QP_CUR_STATE ?
 		attr->cur_qp_state : qp->state;
 	new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
+	opa_ah = rdma_cap_opa_ah(ibqp->device, qp->port_num);
 
 	if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type,
 				attr_mask, link))
···
 		goto inval;
 
 	if (attr_mask & IB_QP_AV) {
-		if (rdma_ah_get_dlid(&attr->ah_attr) >=
-		    be16_to_cpu(IB_MULTICAST_LID_BASE))
-			goto inval;
+		if (opa_ah) {
+			if (rdma_ah_get_dlid(&attr->ah_attr) >=
+				opa_get_mcast_base(OPA_MCAST_NR))
+				goto inval;
+		} else {
+			if (rdma_ah_get_dlid(&attr->ah_attr) >=
+				be16_to_cpu(IB_MULTICAST_LID_BASE))
+				goto inval;
+		}
+
 		if (rvt_check_ah(qp->ibqp.device, &attr->ah_attr))
 			goto inval;
 	}
 
 	if (attr_mask & IB_QP_ALT_PATH) {
-		if (rdma_ah_get_dlid(&attr->alt_ah_attr) >=
-		    be16_to_cpu(IB_MULTICAST_LID_BASE))
-			goto inval;
+		if (opa_ah) {
+			if (rdma_ah_get_dlid(&attr->alt_ah_attr) >=
+				opa_get_mcast_base(OPA_MCAST_NR))
+				goto inval;
+		} else {
+			if (rdma_ah_get_dlid(&attr->alt_ah_attr) >=
+				be16_to_cpu(IB_MULTICAST_LID_BASE))
+				goto inval;
+		}
+
 		if (rvt_check_ah(qp->ibqp.device, &attr->alt_ah_attr))
 			goto inval;
 		if (attr->alt_pkey_index >= rvt_get_npkeys(rdi))

include/rdma/opa_addr.h

···
 #ifndef OPA_ADDR_H
 #define OPA_ADDR_H
 
+#include <rdma/opa_smi.h>
+
 #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)
+/**
+ * 0xF8 - 4 bits of multicast range and 1 bit for collective range
+ * Example: For 24 bit LID space,
+ * Multicast range: 0xF00000 to 0xF7FFFF
+ * Collective range: 0xF80000 to 0xFFFFFE
+ */
+#define OPA_MCAST_NR 0x4 /* Number of top bits set */
+#define OPA_COLLECTIVE_NR 0x1 /* Number of bits after MCAST_NR */
+
 /**
  * ib_is_opa_gid: Returns true if the top 24 bits of the gid
  * contains the OPA_STL_OUI identifier. This identifies that
···
 	else
 		return false;
 }
+
+/* Get multicast lid base */
+static inline u32 opa_get_mcast_base(u32 nr_top_bits)
+{
+	return (be32_to_cpu(OPA_LID_PERMISSIVE) << (32 - nr_top_bits));
+}
+
 #endif /* OPA_ADDR_H */