[PATCH v6 01/12] net/ice: enable RSS RETA ops for DCF hardware

[Kevin Liu <kevinx.liu@intel.com>]

From: Steve Yang <stevex.yang@intel.com>

RSS RETA should be updated and queried by application,
Add related ops ('.reta_update', '.reta_query') for DCF.

Signed-off-by: Steve Yang <stevex.yang@intel.com>
Signed-off-by: Kevin Liu <kevinx.liu@intel.com>
---
 doc/guides/nics/features/ice_dcf.ini   |  1 +
 doc/guides/rel_notes/release_22_07.rst |  3 +
 drivers/net/ice/ice_dcf.c              |  2 +-
 drivers/net/ice/ice_dcf.h              |  1 +
 drivers/net/ice/ice_dcf_ethdev.c       | 77 ++++++++++++++++++++++++++
 5 files changed, 83 insertions(+), 1 deletion(-)

diff --git a/doc/guides/nics/features/ice_dcf.ini b/doc/guides/nics/features/ice_dcf.ini
index 54073f0b88..5221c99a9c 100644
--- a/doc/guides/nics/features/ice_dcf.ini
+++ b/doc/guides/nics/features/ice_dcf.ini
@@ -15,6 +15,7 @@ L3 checksum offload  = P
 L4 checksum offload  = P
 Inner L3 checksum    = P
 Inner L4 checksum    = P
+RSS reta update      = Y
 Basic stats          = Y
 Linux                = Y
 x86-32               = Y
diff --git a/doc/guides/rel_notes/release_22_07.rst b/doc/guides/rel_notes/release_22_07.rst
index 90123bb807..cbdc90760c 100644
--- a/doc/guides/rel_notes/release_22_07.rst
+++ b/doc/guides/rel_notes/release_22_07.rst
@@ -60,6 +60,9 @@ New Features
   * Added Tx QoS queue rate limitation support.
   * Added quanta size configuration support.
 
+* **Updated Intel ice driver.**
+
+ * Added enable RSS RETA ops for DCF hardware.
 
 Removed Items
 -------------
diff --git a/drivers/net/ice/ice_dcf.c b/drivers/net/ice/ice_dcf.c
index 7f0c074b01..070d1b71ac 100644
--- a/drivers/net/ice/ice_dcf.c
+++ b/drivers/net/ice/ice_dcf.c
@@ -790,7 +790,7 @@ ice_dcf_configure_rss_key(struct ice_dcf_hw *hw)
 	return err;
 }
 
-static int
+int
 ice_dcf_configure_rss_lut(struct ice_dcf_hw *hw)
 {
 	struct virtchnl_rss_lut *rss_lut;
diff --git a/drivers/net/ice/ice_dcf.h b/drivers/net/ice/ice_dcf.h
index 6ec766ebda..b2c6aa2684 100644
--- a/drivers/net/ice/ice_dcf.h
+++ b/drivers/net/ice/ice_dcf.h
@@ -122,6 +122,7 @@ int ice_dcf_send_aq_cmd(void *dcf_hw, struct ice_aq_desc *desc,
 int ice_dcf_handle_vsi_update_event(struct ice_dcf_hw *hw);
 int ice_dcf_init_hw(struct rte_eth_dev *eth_dev, struct ice_dcf_hw *hw);
 void ice_dcf_uninit_hw(struct rte_eth_dev *eth_dev, struct ice_dcf_hw *hw);
+int ice_dcf_configure_rss_lut(struct ice_dcf_hw *hw);
 int ice_dcf_init_rss(struct ice_dcf_hw *hw);
 int ice_dcf_configure_queues(struct ice_dcf_hw *hw);
 int ice_dcf_config_irq_map(struct ice_dcf_hw *hw);
diff --git a/drivers/net/ice/ice_dcf_ethdev.c b/drivers/net/ice/ice_dcf_ethdev.c
index 59610e058f..1ac66ed990 100644
--- a/drivers/net/ice/ice_dcf_ethdev.c
+++ b/drivers/net/ice/ice_dcf_ethdev.c
@@ -761,6 +761,81 @@ ice_dcf_dev_flow_ops_get(struct rte_eth_dev *dev,
 	return 0;
 }
 
+static int
+ice_dcf_dev_rss_reta_update(struct rte_eth_dev *dev,
+			struct rte_eth_rss_reta_entry64 *reta_conf,
+			uint16_t reta_size)
+{
+	struct ice_dcf_adapter *adapter = dev->data->dev_private;
+	struct ice_dcf_hw *hw = &adapter->real_hw;
+	uint8_t *lut;
+	uint16_t i, idx, shift;
+	int ret;
+
+	if (!(hw->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_RSS_PF))
+		return -ENOTSUP;
+
+	if (reta_size != hw->vf_res->rss_lut_size) {
+		PMD_DRV_LOG(ERR, "The size of hash lookup table configured "
+			"(%d) doesn't match the number of hardware can "
+			"support (%d)", reta_size, hw->vf_res->rss_lut_size);
+		return -EINVAL;
+	}
+
+	lut = rte_zmalloc("rss_lut", reta_size, 0);
+	if (!lut) {
+		PMD_DRV_LOG(ERR, "No memory can be allocated");
+		return -ENOMEM;
+	}
+	/* store the old lut table temporarily */
+	rte_memcpy(lut, hw->rss_lut, reta_size);
+
+	for (i = 0; i < reta_size; i++) {
+		idx = i / RTE_ETH_RETA_GROUP_SIZE;
+		shift = i % RTE_ETH_RETA_GROUP_SIZE;
+		if (reta_conf[idx].mask & (1ULL << shift))
+			lut[i] = reta_conf[idx].reta[shift];
+	}
+
+	rte_memcpy(hw->rss_lut, lut, reta_size);
+	/* send virtchnnl ops to configure rss*/
+	ret = ice_dcf_configure_rss_lut(hw);
+	if (ret) /* revert back */
+		rte_memcpy(hw->rss_lut, lut, reta_size);
+	rte_free(lut);
+
+	return ret;
+}
+
+static int
+ice_dcf_dev_rss_reta_query(struct rte_eth_dev *dev,
+		       struct rte_eth_rss_reta_entry64 *reta_conf,
+		       uint16_t reta_size)
+{
+	struct ice_dcf_adapter *adapter = dev->data->dev_private;
+	struct ice_dcf_hw *hw = &adapter->real_hw;
+	uint16_t i, idx, shift;
+
+	if (!(hw->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_RSS_PF))
+		return -ENOTSUP;
+
+	if (reta_size != hw->vf_res->rss_lut_size) {
+		PMD_DRV_LOG(ERR, "The size of hash lookup table configured "
+			"(%d) doesn't match the number of hardware can "
+			"support (%d)", reta_size, hw->vf_res->rss_lut_size);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < reta_size; i++) {
+		idx = i / RTE_ETH_RETA_GROUP_SIZE;
+		shift = i % RTE_ETH_RETA_GROUP_SIZE;
+		if (reta_conf[idx].mask & (1ULL << shift))
+			reta_conf[idx].reta[shift] = hw->rss_lut[i];
+	}
+
+	return 0;
+}
+
 #define ICE_DCF_32_BIT_WIDTH (CHAR_BIT * 4)
 #define ICE_DCF_48_BIT_WIDTH (CHAR_BIT * 6)
 #define ICE_DCF_48_BIT_MASK  RTE_LEN2MASK(ICE_DCF_48_BIT_WIDTH, uint64_t)
@@ -1107,6 +1182,8 @@ static const struct eth_dev_ops ice_dcf_eth_dev_ops = {
 	.udp_tunnel_port_add	 = ice_dcf_dev_udp_tunnel_port_add,
 	.udp_tunnel_port_del	 = ice_dcf_dev_udp_tunnel_port_del,
 	.tm_ops_get              = ice_dcf_tm_ops_get,
+	.reta_update             = ice_dcf_dev_rss_reta_update,
+	.reta_query              = ice_dcf_dev_rss_reta_query,
 };
 
 static int
-- 
2.33.1