DC: enable dc for a Generic HCA - apply CR comments.

(cherry picked from commit 4bed082)

Author: alinask

src/uct/ib/dc/base/dc_iface.c

@@ -226,6 +226,9 @@ static void uct_dc_iface_init_version(uct_dc_iface_t *iface, uct_md_h md)
 
     dev = &ucs_derived_of(md, uct_ib_md_t)->dev;
     ver = uct_ib_device_spec(dev)->flags & UCT_IB_DEVICE_FLAG_DC;
+    ucs_assert(ver != UCT_IB_DEVICE_FLAG_DC);
+
+    iface->version_flag = 0;
 
     if (ver & UCT_IB_DEVICE_FLAG_DC_V2) {
         iface->version_flag = UCT_DC_IFACE_ADDR_DC_V2;
@@ -234,8 +237,6 @@ static void uct_dc_iface_init_version(uct_dc_iface_t *iface, uct_md_h md)
     if (ver & UCT_IB_DEVICE_FLAG_DC_V1) {
         iface->version_flag = UCT_DC_IFACE_ADDR_DC_V1;
     }
-
-    iface->version_flag = 0;
 }
 
 UCS_CLASS_INIT_FUNC(uct_dc_iface_t, uct_dc_iface_ops_t *ops, uct_md_h md,
@@ -351,11 +352,10 @@ int uct_dc_iface_is_reachable(const uct_iface_h tl_iface,
     uct_dc_iface_t UCS_V_UNUSED *iface = ucs_derived_of(tl_iface,
                                                         uct_dc_iface_t);
     uct_dc_iface_addr_t *addr = (uct_dc_iface_addr_t *)iface_addr;
-    uint8_t dc_ver_mask = UCT_DC_IFACE_ADDR_DC_V1 | UCT_DC_IFACE_ADDR_DC_V2;
 
     ucs_assert_always(iface_addr != NULL);
 
-    return ((addr->flags & dc_ver_mask) == (iface->version_flag & dc_ver_mask)) &&
+    return ((addr->flags & UCT_DC_IFACE_ADDR_DC_VERS) == iface->version_flag) &&
            (UCT_DC_IFACE_ADDR_TM_ENABLED(addr) ==
             UCT_RC_IFACE_TM_ENABLED(&iface->super)) &&
            uct_ib_iface_is_reachable(tl_iface, dev_addr, iface_addr);

src/uct/ib/dc/base/dc_iface.h

@@ -23,9 +23,11 @@ typedef struct uct_dc_iface  uct_dc_iface_t;
 
 
 typedef enum {
-    UCT_DC_IFACE_ADDR_HW_TM = UCS_BIT(0),
-    UCT_DC_IFACE_ADDR_DC_V1 = UCS_BIT(1),
-    UCT_DC_IFACE_ADDR_DC_V2 = UCS_BIT(2)
+    UCT_DC_IFACE_ADDR_HW_TM   = UCS_BIT(0),
+    UCT_DC_IFACE_ADDR_DC_V1   = UCS_BIT(1),
+    UCT_DC_IFACE_ADDR_DC_V2   = UCS_BIT(2),
+    UCT_DC_IFACE_ADDR_DC_VERS = UCT_DC_IFACE_ADDR_DC_V1 |
+                                UCT_DC_IFACE_ADDR_DC_V2
 } uct_dc_iface_addr_flags_t;