net/cxgbe: support getting RSS hash configuration and key

[dpdk.git] / drivers / net / cxgbe / base / t4_hw.c

diff --git a/drivers/net/cxgbe/base/t4_hw.c b/drivers/net/cxgbe/base/t4_hw.c
index 9eb83fd..2d72146 100644 (file)
--- a/drivers/net/cxgbe/base/t4_hw.c
+++ b/drivers/net/cxgbe/base/t4_hw.c
@@ -2203,6 +2203,18 @@ void t4_fw_tp_pio_rw(struct adapter *adap, u32 *vals, unsigned int nregs,
        }
 }
 
+/**
+ * t4_read_rss_key - read the global RSS key
+ * @adap: the adapter
+ * @key: 10-entry array holding the 320-bit RSS key
+ *
+ * Reads the global 320-bit RSS key.
+ */
+void t4_read_rss_key(struct adapter *adap, u32 *key)
+{
+       t4_fw_tp_pio_rw(adap, key, 10, A_TP_RSS_SECRET_KEY0, 1);
+}
+
 /**
  * t4_write_rss_key - program one of the RSS keys
  * @adap: the adapter
@@ -2363,6 +2375,40 @@ int t4_config_vi_rss(struct adapter *adapter, int mbox, unsigned int viid,
        return t4_wr_mbox(adapter, mbox, &c, sizeof(c), NULL);
 }
 
+/**
+ * t4_read_config_vi_rss - read the configured per VI RSS settings
+ * @adapter: the adapter
+ * @mbox: mbox to use for the FW command
+ * @viid: the VI id
+ * @flags: where to place the configured flags
+ * @defq: where to place the id of the default RSS queue for the VI.
+ *
+ * Read configured VI-specific RSS properties.
+ */
+int t4_read_config_vi_rss(struct adapter *adapter, int mbox, unsigned int viid,
+                         u64 *flags, unsigned int *defq)
+{
+       struct fw_rss_vi_config_cmd c;
+       unsigned int result;
+       int ret;
+
+       memset(&c, 0, sizeof(c));
+       c.op_to_viid = cpu_to_be32(V_FW_CMD_OP(FW_RSS_VI_CONFIG_CMD) |
+                                  F_FW_CMD_REQUEST | F_FW_CMD_READ |
+                                  V_FW_RSS_VI_CONFIG_CMD_VIID(viid));
+       c.retval_len16 = cpu_to_be32(FW_LEN16(c));
+       ret = t4_wr_mbox(adapter, mbox, &c, sizeof(c), &c);
+       if (!ret) {
+               result = be32_to_cpu(c.u.basicvirtual.defaultq_to_udpen);
+               if (defq)
+                       *defq = G_FW_RSS_VI_CONFIG_CMD_DEFAULTQ(result);
+               if (flags)
+                       *flags = result & M_FW_RSS_VI_CONFIG_CMD_DEFAULTQ;
+       }
+
+       return ret;
+}
+
 /**
  * init_cong_ctrl - initialize congestion control parameters
  * @a: the alpha values for congestion control