be2net: fix VF link state transition from disabled to auto

The VF link state setting transition from "disable" to "auto" does not work
due to a bug in SET_LOGICAL_LINK_CONFIG_V1 cmd in FW. This issue could not
be fixed in FW due to some backward compatibility issues it causes with
some released drivers. The issue has been fixed by introducing a new
version (v2) of the cmd from 10.6 FW onwards. In v2, to set the VF link
state to auto, both PLINK_ENABLE and PLINK_TRACK bits have to be set to 1.

The VF link state setting feature now works on Lancer chips too from
FW ver 10.6.315.0 onwards.

Signed-off-by: Suresh Reddy <suresh.reddy@avagotech.com>
Signed-off-by: Sathya Perla <sathya.perla@avagotech.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/emulex/benet/be_cmds.c b/drivers/net/ethernet/emulex/benet/be_cmds.c
index 1795c935ff023fcf795008a49a9a4cd0fce63d9c..8083eca608087e972d4081fb2fa3719bb9b9c170 100644 (file)
--- a/drivers/net/ethernet/emulex/benet/be_cmds.c
+++ b/drivers/net/ethernet/emulex/benet/be_cmds.c
@@ -4260,16 +4260,13 @@ err:
        return status;
 }
 
-int be_cmd_set_logical_link_config(struct be_adapter *adapter,
-                                  int link_state, u8 domain)
+int __be_cmd_set_logical_link_config(struct be_adapter *adapter,
+                                    int link_state, int version, u8 domain)
 {
        struct be_mcc_wrb *wrb;
        struct be_cmd_req_set_ll_link *req;
        int status;
 
-       if (BEx_chip(adapter) || lancer_chip(adapter))
-               return -EOPNOTSUPP;
-
        spin_lock_bh(&adapter->mcc_lock);
 
        wrb = wrb_from_mccq(adapter);
@@ -4284,14 +4281,15 @@ int be_cmd_set_logical_link_config(struct be_adapter *adapter,
                               OPCODE_COMMON_SET_LOGICAL_LINK_CONFIG,
                               sizeof(*req), wrb, NULL);
 
-       req->hdr.version = 1;
+       req->hdr.version = version;
        req->hdr.domain = domain;
 
-       if (link_state == IFLA_VF_LINK_STATE_ENABLE)
-               req->link_config |= 1;
+       if (link_state == IFLA_VF_LINK_STATE_ENABLE ||
+           link_state == IFLA_VF_LINK_STATE_AUTO)
+               req->link_config |= PLINK_ENABLE;
 
        if (link_state == IFLA_VF_LINK_STATE_AUTO)
-               req->link_config |= 1 << PLINK_TRACK_SHIFT;
+               req->link_config |= PLINK_TRACK;
 
        status = be_mcc_notify_wait(adapter);
 err:
@@ -4299,6 +4297,25 @@ err:
        return status;
 }
 
+int be_cmd_set_logical_link_config(struct be_adapter *adapter,
+                                  int link_state, u8 domain)
+{
+       int status;
+
+       if (BEx_chip(adapter))
+               return -EOPNOTSUPP;
+
+       status = __be_cmd_set_logical_link_config(adapter, link_state,
+                                                 2, domain);
+
+       /* Version 2 of the command will not be recognized by older FW.
+        * On such a failure issue version 1 of the command.
+        */
+       if (base_status(status) == MCC_STATUS_ILLEGAL_REQUEST)
+               status = __be_cmd_set_logical_link_config(adapter, link_state,
+                                                         1, domain);
+       return status;
+}
 int be_roce_mcc_cmd(void *netdev_handle, void *wrb_payload,
                    int wrb_payload_size, u16 *cmd_status, u16 *ext_status)
 {

diff --git a/drivers/net/ethernet/emulex/benet/be_cmds.h b/drivers/net/ethernet/emulex/benet/be_cmds.h
index 91155ea74f342e2663f18848c9fe5546635e7c05..9690c3aa5d474a9b0dacc1300b35688c681e1e2d 100644 (file)
--- a/drivers/net/ethernet/emulex/benet/be_cmds.h
+++ b/drivers/net/ethernet/emulex/benet/be_cmds.h
@@ -2246,7 +2246,8 @@ struct be_cmd_resp_get_iface_list {
 };
 
 /*************** Set logical link ********************/
-#define PLINK_TRACK_SHIFT      8
+#define PLINK_ENABLE            BIT(0)
+#define PLINK_TRACK             BIT(8)
 struct be_cmd_req_set_ll_link {
        struct be_cmd_req_hdr hdr;
        u32 link_config; /* Bit 0: UP_DOWN, Bit 9: PLINK */