@@ -262,8 +262,8 @@ static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev)
return NETDEV_TX_OK;
}
- txr = &bp->tx_ring[i];
txq = netdev_get_tx_queue(dev, i);
+ txr = &bp->tx_ring[bp->tx_ring_map[i]];
prod = txr->tx_prod;
free_size = bnxt_tx_avail(bp, txr);
@@ -509,8 +509,7 @@ static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev)
static void bnxt_tx_int(struct bnxt *bp, struct bnxt_napi *bnapi, int nr_pkts)
{
struct bnxt_tx_ring_info *txr = bnapi->tx_ring;
- int index = txr - &bp->tx_ring[0];
- struct netdev_queue *txq = netdev_get_tx_queue(bp->dev, index);
+ struct netdev_queue *txq = netdev_get_tx_queue(bp->dev, txr->txq_index);
u16 cons = txr->tx_cons;
struct pci_dev *pdev = bp->pdev;
int i;
@@ -2975,6 +2974,8 @@ static void bnxt_free_mem(struct bnxt *bp, bool irq_re_init)
bnxt_free_stats(bp);
bnxt_free_ring_grps(bp);
bnxt_free_vnics(bp);
+ kfree(bp->tx_ring_map);
+ bp->tx_ring_map = NULL;
kfree(bp->tx_ring);
bp->tx_ring = NULL;
kfree(bp->rx_ring);
@@ -3027,6 +3028,12 @@ static int bnxt_alloc_mem(struct bnxt *bp, bool irq_re_init)
if (!bp->tx_ring)
return -ENOMEM;
+ bp->tx_ring_map = kcalloc(bp->tx_nr_rings, sizeof(u16),
+ GFP_KERNEL);
+
+ if (!bp->tx_ring_map)
+ return -ENOMEM;
+
if (bp->flags & BNXT_FLAG_SHARED_RINGS)
j = 0;
else
@@ -3035,6 +3042,8 @@ static int bnxt_alloc_mem(struct bnxt *bp, bool irq_re_init)
for (i = 0; i < bp->tx_nr_rings; i++, j++) {
bp->tx_ring[i].bnapi = bp->bnapi[j];
bp->bnapi[j]->tx_ring = &bp->tx_ring[i];
+ bp->tx_ring_map[i] = i;
+ bp->tx_ring[i].txq_index = i;
}
rc = bnxt_alloc_stats(bp);
@@ -566,6 +566,7 @@ struct bnxt_tx_ring_info {
struct bnxt_napi *bnapi;
u16 tx_prod;
u16 tx_cons;
+ u16 txq_index;
void __iomem *tx_doorbell;
struct tx_bd *tx_desc_ring[MAX_TX_PAGES];
@@ -995,6 +996,7 @@ struct bnxt {
struct bnxt_rx_ring_info *rx_ring;
struct bnxt_tx_ring_info *tx_ring;
+ u16 *tx_ring_map;
struct sk_buff * (*gro_func)(struct bnxt_tpa_info *, int, int,
struct sk_buff *);
To support XDP_TX, we need to add a set of dedicated TX rings, each associated with the NAPI of an RX ring. To assign XDP rings and regular rings in a flexible way, we add a bp->tx_ring_map[] array to do the remapping. The netdev txq index is stored in the new field txq_index so that we can retrieve the netdev txq when handling TX completions. In this patch, before we introduce XDP_TX, the mapping is 1:1. v2: Fixed a bug in bnxt_tx_int(). Signed-off-by: Michael Chan <michael.chan@broadcom.com> --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 15 ++++++++++++--- drivers/net/ethernet/broadcom/bnxt/bnxt.h | 2 ++ 2 files changed, 14 insertions(+), 3 deletions(-)