net/i40e/base: allow PF to configure RSS for VF

Add opcodes and structures to support RSS configuration
by PF driver on behalf of the VF drivers.

Signed-off-by: Helin Zhang <helin.zhang@intel.com>
Acked-by: Wenzhuo Lu <wenzhuo.lu@intel.com>

diff --git a/drivers/net/i40e/base/i40e_virtchnl.h b/drivers/net/i40e/base/i40e_virtchnl.h
index 26208f3..fd51ec3 100644 (file)
--- a/drivers/net/i40e/base/i40e_virtchnl.h
+++ b/drivers/net/i40e/base/i40e_virtchnl.h
@@ -87,10 +87,15 @@ enum i40e_virtchnl_ops {
        I40E_VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE = 14,
        I40E_VIRTCHNL_OP_GET_STATS = 15,
        I40E_VIRTCHNL_OP_FCOE = 16,
-       I40E_VIRTCHNL_OP_EVENT = 17,
+       I40E_VIRTCHNL_OP_EVENT = 17, /* must ALWAYS be 17 */
 #ifdef I40E_SOL_VF_SUPPORT
        I40E_VIRTCHNL_OP_GET_ADDNL_SOL_CONFIG = 19,
 #endif
+       I40E_VIRTCHNL_OP_CONFIG_RSS_KEY = 23,
+       I40E_VIRTCHNL_OP_CONFIG_RSS_LUT = 24,
+       I40E_VIRTCHNL_OP_GET_RSS_HENA_CAPS = 25,
+       I40E_VIRTCHNL_OP_SET_RSS_HENA = 26,
+
 };
 
 /* Virtual channel message descriptor. This overlays the admin queue
@@ -164,6 +169,7 @@ struct i40e_virtchnl_vsi_resource {
 #define I40E_VIRTCHNL_VF_OFFLOAD_VLAN          0x00010000
 #define I40E_VIRTCHNL_VF_OFFLOAD_RX_POLLING    0x00020000
 #define I40E_VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2 0x00040000
+#define I40E_VIRTCHNL_VF_OFFLOAD_RSS_PF                0X00080000
 
 struct i40e_virtchnl_vf_resource {
        u16 num_vsis;
@@ -172,8 +178,8 @@ struct i40e_virtchnl_vf_resource {
        u16 max_mtu;
 
        u32 vf_offload_flags;
-       u32 max_fcoe_contexts;
-       u32 max_fcoe_filters;
+       u32 rss_key_size;
+       u32 rss_lut_size;
 
        struct i40e_virtchnl_vsi_resource vsi_res[1];
 };
@@ -349,6 +355,39 @@ struct i40e_virtchnl_promisc_info {
  * PF replies with struct i40e_eth_stats in an external buffer.
  */
 
+/* I40E_VIRTCHNL_OP_CONFIG_RSS_KEY
+ * I40E_VIRTCHNL_OP_CONFIG_RSS_LUT
+ * VF sends these messages to configure RSS. Only supported if both PF
+ * and VF drivers set the I40E_VIRTCHNL_VF_OFFLOAD_RSS_PF bit during
+ * configuration negotiation. If this is the case, then the rss fields in
+ * the vf resource struct are valid.
+ * Both the key and LUT are initialized to 0 by the PF, meaning that
+ * RSS is effectively disabled until set up by the VF.
+ */
+struct i40e_virtchnl_rss_key {
+       u16 vsi_id;
+       u16 key_len;
+       u8 key[1];         /* RSS hash key, packed bytes */
+};
+
+struct i40e_virtchnl_rss_lut {
+       u16 vsi_id;
+       u16 lut_entries;
+       u8 lut[1];        /* RSS lookup table*/
+};
+
+/* I40E_VIRTCHNL_OP_GET_RSS_HENA_CAPS
+ * I40E_VIRTCHNL_OP_SET_RSS_HENA
+ * VF sends these messages to get and set the hash filter enable bits for RSS.
+ * By default, the PF sets these to all possible traffic types that the
+ * hardware supports. The VF can query this value if it wants to change the
+ * traffic types that are hashed by the hardware.
+ * Traffic types are defined in the i40e_filter_pctype enum in i40e_type.h
+ */
+struct i40e_virtchnl_rss_hena {
+       u64 hena;
+};
+
 /* I40E_VIRTCHNL_OP_EVENT
  * PF sends this message to inform the VF driver of events that may affect it.
  * No direct response is expected from the VF, though it may generate other