From: Michael Chan Date: Mon, 6 Feb 2017 21:55:39 +0000 (-0500) Subject: bnxt_en: Add tx ring mapping logic. X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a960dec98861b009b4227d2ae3b94a142c83eb96;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git 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 Signed-off-by: David S. Miller --- 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 *);