Re: [dpdk-dev] [PATCH v2] net/axgbe: add RSS reta/hash query and update

["Somalapuram, Amaranath" <Amaranath.Somalapuram@amd.com>]

[AMD Official Use Only - Internal Distribution Only]

For series,
Acked-by: Somalapuram Amaranath <asomalap@amd.com>

-----Original Message-----
From: Namburu, Chandu-babu <chandu@amd.com>
Sent: Friday, May 29, 2020 5:19 PM
To: dev@dpdk.org
Cc: Somalapuram, Amaranath <Amaranath.Somalapuram@amd.com>
Subject: [PATCH v2] net/axgbe: add RSS reta/hash query and update

From: Chandu Babu N <chandu@amd.com>

add support for RSS reta/hash query and update function

v2:
modification as per Andrew Rybchenko review comments

Signed-off-by: Chandu Babu N <chandu@amd.com>
---
 doc/guides/nics/features/axgbe.ini |   2 +
 drivers/net/axgbe/axgbe_dev.c      |   5 +-
 drivers/net/axgbe/axgbe_ethdev.c   | 144 +++++++++++++++++++++++++++++
 drivers/net/axgbe/axgbe_ethdev.h   |   3 +
 4 files changed, 152 insertions(+), 2 deletions(-)

diff --git a/doc/guides/nics/features/axgbe.ini b/doc/guides/nics/features/axgbe.ini
index 0becaa097..34df0d1ee 100644
--- a/doc/guides/nics/features/axgbe.ini
+++ b/doc/guides/nics/features/axgbe.ini
@@ -11,6 +11,8 @@ Scattered Rx         = Y
 Promiscuous mode     = Y
 Allmulticast mode    = Y
 RSS hash             = Y
+RSS key update       = Y
+RSS reta update      = Y
 CRC offload          = Y
 L3 checksum offload  = Y
 L4 checksum offload  = Y
diff --git a/drivers/net/axgbe/axgbe_dev.c b/drivers/net/axgbe/axgbe_dev.c index 5f0f19592..af62eae3b 100644
--- a/drivers/net/axgbe/axgbe_dev.c
+++ b/drivers/net/axgbe/axgbe_dev.c
@@ -614,7 +614,7 @@ static int axgbe_write_rss_reg(struct axgbe_port *pdata, unsigned int type,
 return -EBUSY;
 }

-static int axgbe_write_rss_hash_key(struct axgbe_port *pdata)
+int axgbe_write_rss_hash_key(struct axgbe_port *pdata)
 {
 struct rte_eth_rss_conf *rss_conf;
 unsigned int key_regs = sizeof(pdata->rss_key) / sizeof(u32); @@ -638,7 +638,7 @@ static int axgbe_write_rss_hash_key(struct axgbe_port *pdata)
 return 0;
 }

-static int axgbe_write_rss_lookup_table(struct axgbe_port *pdata)
+int axgbe_write_rss_lookup_table(struct axgbe_port *pdata)
 {
 unsigned int i;
 int ret;
@@ -683,6 +683,7 @@ static void axgbe_rss_options(struct axgbe_port *pdata)
 uint64_t rss_hf;

 rss_conf = &pdata->eth_dev->data->dev_conf.rx_adv_conf.rss_conf;
+pdata->rss_hf = rss_conf->rss_hf;
 rss_hf = rss_conf->rss_hf;

 if (rss_hf & (ETH_RSS_IPV4 | ETH_RSS_IPV6)) diff --git a/drivers/net/axgbe/axgbe_ethdev.c b/drivers/net/axgbe/axgbe_ethdev.c
index 867058845..619250fb0 100644
--- a/drivers/net/axgbe/axgbe_ethdev.c
+++ b/drivers/net/axgbe/axgbe_ethdev.c
@@ -60,6 +60,16 @@ axgbe_dev_xstats_get_names_by_id(struct rte_eth_dev *dev,
  const uint64_t *ids,
  unsigned int size);
 static int axgbe_dev_xstats_reset(struct rte_eth_dev *dev);
+static int axgbe_dev_rss_reta_update(struct rte_eth_dev *dev,
+  struct rte_eth_rss_reta_entry64 *reta_conf,
+  uint16_t reta_size);
+static int axgbe_dev_rss_reta_query(struct rte_eth_dev *dev,
+ struct rte_eth_rss_reta_entry64 *reta_conf,
+ uint16_t reta_size);
+static int axgbe_dev_rss_hash_update(struct rte_eth_dev *dev,
+     struct rte_eth_rss_conf *rss_conf); static int
+axgbe_dev_rss_hash_conf_get(struct rte_eth_dev *dev,
+       struct rte_eth_rss_conf *rss_conf);
 static int  axgbe_dev_info_get(struct rte_eth_dev *dev,
        struct rte_eth_dev_info *dev_info);  static int axgbe_flow_ctrl_get(struct rte_eth_dev *dev, @@ -201,6 +211,10 @@ static const struct eth_dev_ops axgbe_eth_dev_ops = {
 .xstats_get_names     = axgbe_dev_xstats_get_names,
 .xstats_get_names_by_id = axgbe_dev_xstats_get_names_by_id,
 .xstats_get_by_id     = axgbe_dev_xstats_get_by_id,
+.reta_update          = axgbe_dev_rss_reta_update,
+.reta_query           = axgbe_dev_rss_reta_query,
+.rss_hash_update      = axgbe_dev_rss_hash_update,
+.rss_hash_conf_get    = axgbe_dev_rss_hash_conf_get,
 .dev_infos_get        = axgbe_dev_info_get,
 .rx_queue_setup       = axgbe_dev_rx_queue_setup,
 .rx_queue_release     = axgbe_dev_rx_queue_release,
@@ -450,6 +464,136 @@ axgbe_dev_mac_addr_add(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr,
 return 0;
 }

+static int
+axgbe_dev_rss_reta_update(struct rte_eth_dev *dev,
+  struct rte_eth_rss_reta_entry64 *reta_conf,
+  uint16_t reta_size)
+{
+struct axgbe_port *pdata = dev->data->dev_private;
+unsigned int i, idx, shift;
+int ret;
+
+if (!pdata->rss_enable) {
+PMD_DRV_LOG(ERR, "RSS not enabled\n");
+return -ENOTSUP;
+}
+
+if (reta_size == 0 || reta_size > AXGBE_RSS_MAX_TABLE_SIZE) {
+PMD_DRV_LOG(ERR, "reta_size %d is not supported\n", reta_size);
+return -EINVAL;
+}
+
+for (i = 0; i < reta_size; i++) {
+idx = i / RTE_RETA_GROUP_SIZE;
+shift = i % RTE_RETA_GROUP_SIZE;
+if ((reta_conf[idx].mask & (1ULL << shift)) == 0)
+continue;
+pdata->rss_table[i] = reta_conf[idx].reta[shift];
+}
+
+/* Program the lookup table */
+ret = axgbe_write_rss_lookup_table(pdata);
+return ret;
+}
+
+static int
+axgbe_dev_rss_reta_query(struct rte_eth_dev *dev,
+ struct rte_eth_rss_reta_entry64 *reta_conf,
+ uint16_t reta_size)
+{
+struct axgbe_port *pdata = dev->data->dev_private;
+unsigned int i, idx, shift;
+
+if (!pdata->rss_enable) {
+PMD_DRV_LOG(ERR, "RSS not enabled\n");
+return -ENOTSUP;
+}
+
+if (reta_size == 0 || reta_size > AXGBE_RSS_MAX_TABLE_SIZE) {
+PMD_DRV_LOG(ERR, "reta_size %d is not supported\n", reta_size);
+return -EINVAL;
+}
+
+for (i = 0; i < reta_size; i++) {
+idx = i / RTE_RETA_GROUP_SIZE;
+shift = i % RTE_RETA_GROUP_SIZE;
+if ((reta_conf[idx].mask & (1ULL << shift)) == 0)
+continue;
+reta_conf[idx].reta[shift] = pdata->rss_table[i];
+}
+return 0;
+}
+
+static int
+axgbe_dev_rss_hash_update(struct rte_eth_dev *dev,
+  struct rte_eth_rss_conf *rss_conf) {
+struct axgbe_port *pdata = dev->data->dev_private;
+int ret;
+
+if (!pdata->rss_enable) {
+PMD_DRV_LOG(ERR, "RSS not enabled\n");
+return -ENOTSUP;
+}
+
+if (rss_conf == NULL) {
+PMD_DRV_LOG(ERR, "rss_conf value isn't valid\n");
+return -EINVAL;
+}
+
+if (rss_conf->rss_key != NULL &&
+    rss_conf->rss_key_len == AXGBE_RSS_HASH_KEY_SIZE) {
+rte_memcpy(pdata->rss_key, rss_conf->rss_key,
+       AXGBE_RSS_HASH_KEY_SIZE);
+/* Program the hash key */
+ret = axgbe_write_rss_hash_key(pdata);
+if (ret != 0)
+return ret;
+}
+
+pdata->rss_hf = rss_conf->rss_hf & AXGBE_RSS_OFFLOAD;
+
+if (pdata->rss_hf & (ETH_RSS_IPV4 | ETH_RSS_IPV6))
+AXGMAC_SET_BITS(pdata->rss_options, MAC_RSSCR, IP2TE, 1);
+if (pdata->rss_hf &
+    (ETH_RSS_NONFRAG_IPV4_TCP | ETH_RSS_NONFRAG_IPV6_TCP))
+AXGMAC_SET_BITS(pdata->rss_options, MAC_RSSCR, TCP4TE, 1);
+if (pdata->rss_hf &
+    (ETH_RSS_NONFRAG_IPV4_UDP | ETH_RSS_NONFRAG_IPV6_UDP))
+AXGMAC_SET_BITS(pdata->rss_options, MAC_RSSCR, UDP4TE, 1);
+
+/* Set the RSS options */
+AXGMAC_IOWRITE(pdata, MAC_RSSCR, pdata->rss_options);
+
+return 0;
+}
+
+static int
+axgbe_dev_rss_hash_conf_get(struct rte_eth_dev *dev,
+    struct rte_eth_rss_conf *rss_conf) {
+struct axgbe_port *pdata = dev->data->dev_private;
+
+if (!pdata->rss_enable) {
+PMD_DRV_LOG(ERR, "RSS not enabled\n");
+return -ENOTSUP;
+}
+
+if (rss_conf == NULL) {
+PMD_DRV_LOG(ERR, "rss_conf value isn't valid\n");
+return -EINVAL;
+}
+
+if (rss_conf->rss_key != NULL &&
+    rss_conf->rss_key_len >= AXGBE_RSS_HASH_KEY_SIZE) {
+rte_memcpy(rss_conf->rss_key, pdata->rss_key,
+       AXGBE_RSS_HASH_KEY_SIZE);
+}
+rss_conf->rss_key_len = AXGBE_RSS_HASH_KEY_SIZE;
+rss_conf->rss_hf = pdata->rss_hf;
+return 0;
+}
+
 static void
 axgbe_dev_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)  { diff --git a/drivers/net/axgbe/axgbe_ethdev.h b/drivers/net/axgbe/axgbe_ethdev.h
index f10ec4a40..cedce5af6 100644
--- a/drivers/net/axgbe/axgbe_ethdev.h
+++ b/drivers/net/axgbe/axgbe_ethdev.h
@@ -594,6 +594,7 @@ struct axgbe_port {
 uint32_t rss_table[AXGBE_RSS_MAX_TABLE_SIZE];
 uint32_t rss_options;
 int rss_enable;
+uint64_t rss_hf;

 /* Hardware features of the device */
 struct axgbe_hw_features hw_feat;
@@ -653,5 +654,7 @@ void axgbe_init_function_ptrs_i2c(struct axgbe_i2c_if *i2c_if);  void axgbe_set_mac_addn_addr(struct axgbe_port *pdata, u8 *addr,
      uint32_t index);
 void axgbe_set_mac_hash_table(struct axgbe_port *pdata, u8 *addr, bool add);
+int axgbe_write_rss_lookup_table(struct axgbe_port *pdata); int
+axgbe_write_rss_hash_key(struct axgbe_port *pdata);

 #endif /* RTE_ETH_AXGBE_H_ */
--
2.17.1