net/cxgbe: enable RSS for VF

[dpdk.git] / drivers / net / cxgbe / base / t4vf_hw.c

diff --git a/drivers/net/cxgbe/base/t4vf_hw.c b/drivers/net/cxgbe/base/t4vf_hw.c
index 8e48588..f040875 100644 (file)
--- a/drivers/net/cxgbe/base/t4vf_hw.c
+++ b/drivers/net/cxgbe/base/t4vf_hw.c
@@ -509,6 +509,77 @@ unsigned int t4vf_get_pf_from_vf(struct adapter *adapter)
                        G_SOURCEPF(whoami) : G_T6_SOURCEPF(whoami));
 }
 
+/**
+ * t4vf_get_rss_glb_config - retrieve adapter RSS Global Configuration
+ * @adapter: the adapter
+ *
+ * Retrieves global RSS mode and parameters with which we have to live
+ * and stores them in the @adapter's RSS parameters.
+ */
+int t4vf_get_rss_glb_config(struct adapter *adapter)
+{
+       struct rss_params *rss = &adapter->params.rss;
+       struct fw_rss_glb_config_cmd cmd, rpl;
+       int v;
+
+       /*
+        * Execute an RSS Global Configuration read command to retrieve
+        * our RSS configuration.
+        */
+       memset(&cmd, 0, sizeof(cmd));
+       cmd.op_to_write = cpu_to_be32(V_FW_CMD_OP(FW_RSS_GLB_CONFIG_CMD) |
+                                     F_FW_CMD_REQUEST |
+                                     F_FW_CMD_READ);
+       cmd.retval_len16 = cpu_to_be32(FW_LEN16(cmd));
+       v = t4vf_wr_mbox(adapter, &cmd, sizeof(cmd), &rpl);
+       if (v != FW_SUCCESS)
+               return v;
+
+       /*
+        * Translate the big-endian RSS Global Configuration into our
+        * cpu-endian format based on the RSS mode.  We also do first level
+        * filtering at this point to weed out modes which don't support
+        * VF Drivers ...
+        */
+       rss->mode = G_FW_RSS_GLB_CONFIG_CMD_MODE
+                       (be32_to_cpu(rpl.u.manual.mode_pkd));
+       switch (rss->mode) {
+       case FW_RSS_GLB_CONFIG_CMD_MODE_BASICVIRTUAL: {
+               u32 word = be32_to_cpu
+                               (rpl.u.basicvirtual.synmapen_to_hashtoeplitz);
+
+               rss->u.basicvirtual.synmapen =
+                       ((word & F_FW_RSS_GLB_CONFIG_CMD_SYNMAPEN) != 0);
+               rss->u.basicvirtual.syn4tupenipv6 =
+                       ((word & F_FW_RSS_GLB_CONFIG_CMD_SYN4TUPENIPV6) != 0);
+               rss->u.basicvirtual.syn2tupenipv6 =
+                       ((word & F_FW_RSS_GLB_CONFIG_CMD_SYN2TUPENIPV6) != 0);
+               rss->u.basicvirtual.syn4tupenipv4 =
+                       ((word & F_FW_RSS_GLB_CONFIG_CMD_SYN4TUPENIPV4) != 0);
+               rss->u.basicvirtual.syn2tupenipv4 =
+                       ((word & F_FW_RSS_GLB_CONFIG_CMD_SYN2TUPENIPV4) != 0);
+               rss->u.basicvirtual.ofdmapen =
+                       ((word & F_FW_RSS_GLB_CONFIG_CMD_OFDMAPEN) != 0);
+               rss->u.basicvirtual.tnlmapen =
+                       ((word & F_FW_RSS_GLB_CONFIG_CMD_TNLMAPEN) != 0);
+               rss->u.basicvirtual.tnlalllookup =
+                       ((word  & F_FW_RSS_GLB_CONFIG_CMD_TNLALLLKP) != 0);
+               rss->u.basicvirtual.hashtoeplitz =
+                       ((word & F_FW_RSS_GLB_CONFIG_CMD_HASHTOEPLITZ) != 0);
+
+               /* we need at least Tunnel Map Enable to be set */
+               if (!rss->u.basicvirtual.tnlmapen)
+                       return -EINVAL;
+               break;
+       }
+
+       default:
+               /* all unknown/unsupported RSS modes result in an error */
+               return -EINVAL;
+       }
+       return 0;
+}
+
 /**
  * t4vf_get_vfres - retrieve VF resource limits
  * @adapter: the adapter