IB: Add new InfiniBand link speeds

Introduce support for the following extended speeds:

FDR-10: a Mellanox proprietary link speed which is 10.3125 Gbps with
        64b/66b encoding rather than 8b/10b encoding.
FDR:    IBA extended speed 14.0625 Gbps.
EDR:    IBA extended speed 25.78125 Gbps.

Signed-off-by: Marcel Apfelbaum <marcela@dev.mellanox.co.il>
Reviewed-by: Hal Rosenstock <hal@mellanox.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

3 files changed, 64 insertions, 5 deletions

diff --git a/drivers/infiniband/core/sysfs.c b/drivers/infiniband/core/sysfs.c
index 9ab5df72df7b..2b59b72b57f9 100644
--- a/drivers/infiniband/core/sysfs.c
+++ b/drivers/infiniband/core/sysfs.c
@@ -185,17 +185,35 @@ static ssize_t rate_show(struct ib_port *p, struct port_attribute *unused,
         if (ret)
                 return ret;
 
+        rate = (25 * attr.active_speed) / 10;
+
         switch (attr.active_speed) {
-        case 2: speed = " DDR"; break;
-        case 4: speed = " QDR"; break;
+        case 2:
+                speed = " DDR";
+                break;
+        case 4:
+                speed = " QDR";
+                break;
+        case 8:
+                speed = " FDR10";
+                rate = 10;
+                break;
+        case 16:
+                speed = " FDR";
+                rate = 14;
+                break;
+        case 32:
+                speed = " EDR";
+                rate = 25;
+                break;
         }
 
-        rate = 25 * ib_width_enum_to_int(attr.active_width) * attr.active_speed;
+        rate *= ib_width_enum_to_int(attr.active_width);
         if (rate < 0)
                 return -EINVAL;
 
         return sprintf(buf, "%d%s Gb/sec (%dX%s)\n",
-                       rate / 10, rate % 10 ? ".5" : "",
+                       rate, (attr.active_speed == 1) ? ".5" : "",
                        ib_width_enum_to_int(attr.active_width), speed);
 }
 
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index af7a8b08b2e9..2abed810d8d5 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -77,6 +77,31 @@ enum ib_rate mult_to_ib_rate(int mult)
 }
 EXPORT_SYMBOL(mult_to_ib_rate);
 
+int ib_rate_to_mbps(enum ib_rate rate)
+{
+        switch (rate) {
+        case IB_RATE_2_5_GBPS: return 2500;
+        case IB_RATE_5_GBPS:   return 5000;
+        case IB_RATE_10_GBPS:  return 10000;
+        case IB_RATE_20_GBPS:  return 20000;
+        case IB_RATE_30_GBPS:  return 30000;
+        case IB_RATE_40_GBPS:  return 40000;
+        case IB_RATE_60_GBPS:  return 60000;
+        case IB_RATE_80_GBPS:  return 80000;
+        case IB_RATE_120_GBPS: return 120000;
+        case IB_RATE_14_GBPS:  return 14062;
+        case IB_RATE_56_GBPS:  return 56250;
+        case IB_RATE_112_GBPS: return 112500;
+        case IB_RATE_168_GBPS: return 168750;
+        case IB_RATE_25_GBPS:  return 25781;
+        case IB_RATE_100_GBPS: return 103125;
+        case IB_RATE_200_GBPS: return 206250;
+        case IB_RATE_300_GBPS: return 309375;
+        default:               return -1;
+        }
+}
+EXPORT_SYMBOL(ib_rate_to_mbps);
+
 enum rdma_transport_type
 rdma_node_get_transport(enum rdma_node_type node_type)
 {
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 228be3e220d9..97c98c0d89b1 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -207,6 +207,7 @@ enum ib_port_cap_flags {
         IB_PORT_SM_DISABLED                     = 1 << 10,
         IB_PORT_SYS_IMAGE_GUID_SUP              = 1 << 11,
         IB_PORT_PKEY_SW_EXT_PORT_TRAP_SUP       = 1 << 12,
+        IB_PORT_EXTENDED_SPEEDS_SUP             = 1 << 14,
         IB_PORT_CM_SUP                          = 1 << 16,
         IB_PORT_SNMP_TUNNEL_SUP                 = 1 << 17,
         IB_PORT_REINIT_SUP                      = 1 << 18,
@@ -415,7 +416,15 @@ enum ib_rate {
         IB_RATE_40_GBPS  = 7,
         IB_RATE_60_GBPS  = 8,
         IB_RATE_80_GBPS  = 9,
-        IB_RATE_120_GBPS = 10
+        IB_RATE_120_GBPS = 10,
+        IB_RATE_14_GBPS  = 11,
+        IB_RATE_56_GBPS  = 12,
+        IB_RATE_112_GBPS = 13,
+        IB_RATE_168_GBPS = 14,
+        IB_RATE_25_GBPS  = 15,
+        IB_RATE_100_GBPS = 16,
+        IB_RATE_200_GBPS = 17,
+        IB_RATE_300_GBPS = 18
 };
 
 /**
@@ -427,6 +436,13 @@ enum ib_rate {
 int ib_rate_to_mult(enum ib_rate rate) __attribute_const__;
 
 /**
+ * ib_rate_to_mbps - Convert the IB rate enum to Mbps.
+ * For example, IB_RATE_2_5_GBPS will be converted to 2500.
+ * @rate: rate to convert.
+ */
+int ib_rate_to_mbps(enum ib_rate rate) __attribute_const__;
+
+/**
  * mult_to_ib_rate - Convert a multiple of 2.5 Gbit/sec to an IB rate
  * enum.
  * @mult: multiple to convert.