bnx2x: Support for managing RX indirection table

Support fetching and retrieving RX indirection table via ethtool.

Signed-off-by: Tom Herbert <therbert@google.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 75 insertions, 5 deletions

diff --git a/drivers/net/bnx2x/bnx2x.h b/drivers/net/bnx2x/bnx2x.h
index 236d79a80624..c0dd30d870ae 100644
--- a/drivers/net/bnx2x/bnx2x.h
+++ b/drivers/net/bnx2x/bnx2x.h
@@ -1076,6 +1076,7 @@ struct bnx2x {
         int                     num_queues;
         int                     disable_tpa;
         int                     int_mode;
+        u32                     *rx_indir_table;
 
         struct tstorm_eth_mac_filter_config     mac_filters;
 #define BNX2X_ACCEPT_NONE               0x0000
@@ -1799,5 +1800,6 @@ static inline u32 reg_poll(struct bnx2x *bp, u32 reg, u32 expected, int ms,
 BNX2X_EXTERN int load_count[2][3]; /* per path: 0-common, 1-port0, 2-port1 */
 
 extern void bnx2x_set_ethtool_ops(struct net_device *netdev);
+void bnx2x_push_indir_table(struct bnx2x *bp);
 
 #endif /* bnx2x.h */
diff --git a/drivers/net/bnx2x/bnx2x_ethtool.c b/drivers/net/bnx2x/bnx2x_ethtool.c
index 816fef6d3844..8d19d127f796 100644
--- a/drivers/net/bnx2x/bnx2x_ethtool.c
+++ b/drivers/net/bnx2x/bnx2x_ethtool.c
@@ -2134,6 +2134,59 @@ static int bnx2x_phys_id(struct net_device *dev, u32 data)
         return 0;
 }
 
+static int bnx2x_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info,
+                           void *rules __always_unused)
+{
+        struct bnx2x *bp = netdev_priv(dev);
+
+        switch (info->cmd) {
+        case ETHTOOL_GRXRINGS:
+                info->data = BNX2X_NUM_ETH_QUEUES(bp);
+                return 0;
+
+        default:
+                return -EOPNOTSUPP;
+        }
+}
+
+static int bnx2x_get_rxfh_indir(struct net_device *dev,
+                                struct ethtool_rxfh_indir *indir)
+{
+        struct bnx2x *bp = netdev_priv(dev);
+        size_t copy_size =
+                min_t(size_t, indir->size, TSTORM_INDIRECTION_TABLE_SIZE);
+
+        if (bp->multi_mode == ETH_RSS_MODE_DISABLED)
+                return -EOPNOTSUPP;
+
+        indir->size = TSTORM_INDIRECTION_TABLE_SIZE;
+        memcpy(indir->ring_index, bp->rx_indir_table,
+               copy_size * sizeof(bp->rx_indir_table[0]));
+        return 0;
+}
+
+static int bnx2x_set_rxfh_indir(struct net_device *dev,
+                                const struct ethtool_rxfh_indir *indir)
+{
+        struct bnx2x *bp = netdev_priv(dev);
+        size_t i;
+
+        if (bp->multi_mode == ETH_RSS_MODE_DISABLED)
+                return -EOPNOTSUPP;
+
+        /* Validate size and indices */
+        if (indir->size != TSTORM_INDIRECTION_TABLE_SIZE)
+                return -EINVAL;
+        for (i = 0; i < TSTORM_INDIRECTION_TABLE_SIZE; i++)
+                if (indir->ring_index[i] >= BNX2X_NUM_ETH_QUEUES(bp))
+                        return -EINVAL;
+
+        memcpy(bp->rx_indir_table, indir->ring_index,
+               indir->size * sizeof(bp->rx_indir_table[0]));
+        bnx2x_push_indir_table(bp);
+        return 0;
+}
+
 static const struct ethtool_ops bnx2x_ethtool_ops = {
         .get_settings           = bnx2x_get_settings,
         .set_settings           = bnx2x_set_settings,
@@ -2170,6 +2223,9 @@ static const struct ethtool_ops bnx2x_ethtool_ops = {
         .get_strings            = bnx2x_get_strings,
         .phys_id                = bnx2x_phys_id,
         .get_ethtool_stats      = bnx2x_get_ethtool_stats,
+        .get_rxnfc              = bnx2x_get_rxnfc,
+        .get_rxfh_indir         = bnx2x_get_rxfh_indir,
+        .set_rxfh_indir         = bnx2x_set_rxfh_indir,
 };
 
 void bnx2x_set_ethtool_ops(struct net_device *netdev)
diff --git a/drivers/net/bnx2x/bnx2x_main.c b/drivers/net/bnx2x/bnx2x_main.c
index c238c4d65d13..6c7745eee00d 100644
--- a/drivers/net/bnx2x/bnx2x_main.c
+++ b/drivers/net/bnx2x/bnx2x_main.c
@@ -4254,7 +4254,7 @@ static void bnx2x_init_eq_ring(struct bnx2x *bp)
                 min_t(int, MAX_SP_DESC_CNT - MAX_SPQ_PENDING, NUM_EQ_DESC) - 1);
 }
 
-static void bnx2x_init_ind_table(struct bnx2x *bp)
+void bnx2x_push_indir_table(struct bnx2x *bp)
 {
         int func = BP_FUNC(bp);
         int i;
@@ -4262,13 +4262,20 @@ static void bnx2x_init_ind_table(struct bnx2x *bp)
         if (bp->multi_mode == ETH_RSS_MODE_DISABLED)
                 return;
 
-        DP(NETIF_MSG_IFUP,
-           "Initializing indirection table  multi_mode %d\n", bp->multi_mode);
         for (i = 0; i < TSTORM_INDIRECTION_TABLE_SIZE; i++)
                 REG_WR8(bp, BAR_TSTRORM_INTMEM +
                         TSTORM_INDIRECTION_TABLE_OFFSET(func) + i,
-                        bp->fp->cl_id + (i % (bp->num_queues -
-                                NONE_ETH_CONTEXT_USE)));
+                        bp->fp->cl_id + bp->rx_indir_table[i]);
+}
+
+static void bnx2x_init_ind_table(struct bnx2x *bp)
+{
+        int i;
+
+        for (i = 0; i < TSTORM_INDIRECTION_TABLE_SIZE; i++)
+                bp->rx_indir_table[i] = i % BNX2X_NUM_ETH_QUEUES(bp);
+
+        bnx2x_push_indir_table(bp);
 }
 
 void bnx2x_set_storm_rx_mode(struct bnx2x *bp)
@@ -6016,6 +6023,8 @@ void bnx2x_free_mem(struct bnx2x *bp)
         BNX2X_PCI_FREE(bp->eq_ring, bp->eq_mapping,
                        BCM_PAGE_SIZE * NUM_EQ_PAGES);
 
+        BNX2X_FREE(bp->rx_indir_table);
+
 #undef BNX2X_PCI_FREE
 #undef BNX2X_KFREE
 }
@@ -6146,6 +6155,9 @@ int bnx2x_alloc_mem(struct bnx2x *bp)
         /* EQ */
         BNX2X_PCI_ALLOC(bp->eq_ring, &bp->eq_mapping,
                         BCM_PAGE_SIZE * NUM_EQ_PAGES);
+
+        BNX2X_ALLOC(bp->rx_indir_table, sizeof(bp->rx_indir_table[0]) *
+                    TSTORM_INDIRECTION_TABLE_SIZE);
         return 0;
 
 alloc_mem_err: