diff options
| author | Michael Chan <michael.chan@broadcom.com> | 2017-02-07 00:55:39 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-02-07 21:30:59 +0300 |
| commit | a960dec98861b009b4227d2ae3b94a142c83eb96 (patch) | |
| tree | 6c427d4de9015c2d2ef9dcfed34ec2db00db06e0 /drivers/net/ethernet/broadcom | |
| parent | d1e7925e6d80ce5f9ef6deb8f3cec7526f5c443c (diff) | |
| download | linux-a960dec98861b009b4227d2ae3b94a142c83eb96.tar.xz | |
bnxt_en: Add tx ring mapping logic.
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>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/broadcom')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnxt/bnxt.c | 15 | ||||
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnxt/bnxt.h | 2 |
2 files changed, 14 insertions, 3 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index 1b051f930598..811bc825bf90 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -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 @@ tx_dma_error: 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); diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h index 3a079b834a9c..97ccce184694 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h @@ -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 *); |