netxen: add receive side scaling (rss) support

[mirror_ubuntu-bionic-kernel.git] / drivers / net / netxen / netxen_nic_hw.c

diff --git a/drivers/net/netxen/netxen_nic_hw.c b/drivers/net/netxen/netxen_nic_hw.c
index cea7300426b4008616b983f1603c6135eef629f6..c89c791e281cb1b972262e45f178252edf4b4598 100644 (file)
--- a/drivers/net/netxen/netxen_nic_hw.c
+++ b/drivers/net/netxen/netxen_nic_hw.c
@@ -670,6 +670,53 @@ int netxen_config_intr_coalesce(struct netxen_adapter *adapter)
        return rv;
 }
 
+#define RSS_HASHTYPE_IP_TCP    0x3
+
+int netxen_config_rss(struct netxen_adapter *adapter, int enable)
+{
+       nx_nic_req_t req;
+       u64 word;
+       int i, rv;
+
+       u64 key[] = { 0xbeac01fa6a42b73bULL, 0x8030f20c77cb2da3ULL,
+                       0xae7b30b4d0ca2bcbULL, 0x43a38fb04167253dULL,
+                       0x255b0ec26d5a56daULL };
+
+
+       memset(&req, 0, sizeof(nx_nic_req_t));
+       req.qhdr = cpu_to_le64(NX_HOST_REQUEST << 23);
+
+       word = NX_NIC_H2C_OPCODE_CONFIG_RSS | ((u64)adapter->portnum << 16);
+       req.req_hdr = cpu_to_le64(word);
+
+       /*
+        * RSS request:
+        * bits 3-0: hash_method
+        *      5-4: hash_type_ipv4
+        *      7-6: hash_type_ipv6
+        *        8: enable
+        *        9: use indirection table
+        *    47-10: reserved
+        *    63-48: indirection table mask
+        */
+       word =  ((u64)(RSS_HASHTYPE_IP_TCP & 0x3) << 4) |
+               ((u64)(RSS_HASHTYPE_IP_TCP & 0x3) << 6) |
+               ((u64)(enable & 0x1) << 8) |
+               ((0x7ULL) << 48);
+       req.words[0] = cpu_to_le64(word);
+       for (i = 0; i < 5; i++)
+               req.words[i+1] = cpu_to_le64(key[i]);
+
+
+       rv = netxen_send_cmd_descs(adapter, (struct cmd_desc_type0 *)&req, 1);
+       if (rv != 0) {
+               printk(KERN_ERR "%s: could not configure RSS\n",
+                               adapter->netdev->name);
+       }
+
+       return rv;
+}
+
 /*
  * netxen_nic_change_mtu - Change the Maximum Transfer Unit
  * @returns 0 on success, negative on failure