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path: root/drivers/net/ethernet/broadcom/bnxt
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Diffstat (limited to 'drivers/net/ethernet/broadcom/bnxt')
-rw-r--r--drivers/net/ethernet/broadcom/bnxt/bnxt.c113
-rw-r--r--drivers/net/ethernet/broadcom/bnxt/bnxt.h1
2 files changed, 77 insertions, 37 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 8eb59666aac1..893bdaf03043 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -72,7 +72,8 @@
#include "bnxt_debugfs.h"
#define BNXT_TX_TIMEOUT (5 * HZ)
-#define BNXT_DEF_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_HW)
+#define BNXT_DEF_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_HW | \
+ NETIF_MSG_TX_ERR)
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Broadcom BCM573xx network driver");
@@ -367,6 +368,33 @@ static u16 bnxt_xmit_get_cfa_action(struct sk_buff *skb)
return md_dst->u.port_info.port_id;
}
+static void bnxt_txr_db_kick(struct bnxt *bp, struct bnxt_tx_ring_info *txr,
+ u16 prod)
+{
+ bnxt_db_write(bp, &txr->tx_db, prod);
+ txr->kick_pending = 0;
+}
+
+static bool bnxt_txr_netif_try_stop_queue(struct bnxt *bp,
+ struct bnxt_tx_ring_info *txr,
+ struct netdev_queue *txq)
+{
+ netif_tx_stop_queue(txq);
+
+ /* netif_tx_stop_queue() must be done before checking
+ * tx index in bnxt_tx_avail() below, because in
+ * bnxt_tx_int(), we update tx index before checking for
+ * netif_tx_queue_stopped().
+ */
+ smp_mb();
+ if (bnxt_tx_avail(bp, txr) > bp->tx_wake_thresh) {
+ netif_tx_wake_queue(txq);
+ return false;
+ }
+
+ return true;
+}
+
static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct bnxt *bp = netdev_priv(dev);
@@ -386,6 +414,7 @@ static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev)
i = skb_get_queue_mapping(skb);
if (unlikely(i >= bp->tx_nr_rings)) {
dev_kfree_skb_any(skb);
+ atomic_long_inc(&dev->tx_dropped);
return NETDEV_TX_OK;
}
@@ -395,8 +424,12 @@ static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev)
free_size = bnxt_tx_avail(bp, txr);
if (unlikely(free_size < skb_shinfo(skb)->nr_frags + 2)) {
- netif_tx_stop_queue(txq);
- return NETDEV_TX_BUSY;
+ /* We must have raced with NAPI cleanup */
+ if (net_ratelimit() && txr->kick_pending)
+ netif_warn(bp, tx_err, dev,
+ "bnxt: ring busy w/ flush pending!\n");
+ if (bnxt_txr_netif_try_stop_queue(bp, txr, txq))
+ return NETDEV_TX_BUSY;
}
length = skb->len;
@@ -519,21 +552,16 @@ static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev)
normal_tx:
if (length < BNXT_MIN_PKT_SIZE) {
pad = BNXT_MIN_PKT_SIZE - length;
- if (skb_pad(skb, pad)) {
+ if (skb_pad(skb, pad))
/* SKB already freed. */
- tx_buf->skb = NULL;
- return NETDEV_TX_OK;
- }
+ goto tx_kick_pending;
length = BNXT_MIN_PKT_SIZE;
}
mapping = dma_map_single(&pdev->dev, skb->data, len, DMA_TO_DEVICE);
- if (unlikely(dma_mapping_error(&pdev->dev, mapping))) {
- dev_kfree_skb_any(skb);
- tx_buf->skb = NULL;
- return NETDEV_TX_OK;
- }
+ if (unlikely(dma_mapping_error(&pdev->dev, mapping)))
+ goto tx_free;
dma_unmap_addr_set(tx_buf, mapping, mapping);
flags = (len << TX_BD_LEN_SHIFT) | TX_BD_TYPE_LONG_TX_BD |
@@ -620,24 +648,17 @@ normal_tx:
txr->tx_prod = prod;
if (!netdev_xmit_more() || netif_xmit_stopped(txq))
- bnxt_db_write(bp, &txr->tx_db, prod);
+ bnxt_txr_db_kick(bp, txr, prod);
+ else
+ txr->kick_pending = 1;
tx_done:
if (unlikely(bnxt_tx_avail(bp, txr) <= MAX_SKB_FRAGS + 1)) {
if (netdev_xmit_more() && !tx_buf->is_push)
- bnxt_db_write(bp, &txr->tx_db, prod);
-
- netif_tx_stop_queue(txq);
+ bnxt_txr_db_kick(bp, txr, prod);
- /* netif_tx_stop_queue() must be done before checking
- * tx index in bnxt_tx_avail() below, because in
- * bnxt_tx_int(), we update tx index before checking for
- * netif_tx_queue_stopped().
- */
- smp_mb();
- if (bnxt_tx_avail(bp, txr) > bp->tx_wake_thresh)
- netif_tx_wake_queue(txq);
+ bnxt_txr_netif_try_stop_queue(bp, txr, txq);
}
return NETDEV_TX_OK;
@@ -650,7 +671,6 @@ tx_dma_error:
/* start back at beginning and unmap skb */
prod = txr->tx_prod;
tx_buf = &txr->tx_buf_ring[prod];
- tx_buf->skb = NULL;
dma_unmap_single(&pdev->dev, dma_unmap_addr(tx_buf, mapping),
skb_headlen(skb), PCI_DMA_TODEVICE);
prod = NEXT_TX(prod);
@@ -664,7 +684,13 @@ tx_dma_error:
PCI_DMA_TODEVICE);
}
+tx_free:
dev_kfree_skb_any(skb);
+tx_kick_pending:
+ if (txr->kick_pending)
+ bnxt_txr_db_kick(bp, txr, txr->tx_prod);
+ txr->tx_buf_ring[txr->tx_prod].skb = NULL;
+ atomic_long_inc(&dev->tx_dropped);
return NETDEV_TX_OK;
}
@@ -734,14 +760,9 @@ next_tx_int:
smp_mb();
if (unlikely(netif_tx_queue_stopped(txq)) &&
- (bnxt_tx_avail(bp, txr) > bp->tx_wake_thresh)) {
- __netif_tx_lock(txq, smp_processor_id());
- if (netif_tx_queue_stopped(txq) &&
- bnxt_tx_avail(bp, txr) > bp->tx_wake_thresh &&
- txr->dev_state != BNXT_DEV_STATE_CLOSING)
- netif_tx_wake_queue(txq);
- __netif_tx_unlock(txq);
- }
+ bnxt_tx_avail(bp, txr) > bp->tx_wake_thresh &&
+ READ_ONCE(txr->dev_state) != BNXT_DEV_STATE_CLOSING)
+ netif_tx_wake_queue(txq);
}
static struct page *__bnxt_alloc_rx_page(struct bnxt *bp, dma_addr_t *mapping,
@@ -1769,6 +1790,10 @@ static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_cp_ring_info *cpr,
if (!RX_CMP_VALID(rxcmp1, tmp_raw_cons))
return -EBUSY;
+ /* The valid test of the entry must be done first before
+ * reading any further.
+ */
+ dma_rmb();
prod = rxr->rx_prod;
if (cmp_type == CMP_TYPE_RX_L2_TPA_START_CMP) {
@@ -1991,6 +2016,10 @@ static int bnxt_force_rx_discard(struct bnxt *bp,
if (!RX_CMP_VALID(rxcmp1, tmp_raw_cons))
return -EBUSY;
+ /* The valid test of the entry must be done first before
+ * reading any further.
+ */
+ dma_rmb();
cmp_type = RX_CMP_TYPE(rxcmp);
if (cmp_type == CMP_TYPE_RX_L2_CMP) {
rxcmp1->rx_cmp_cfa_code_errors_v2 |=
@@ -2477,6 +2506,10 @@ static int bnxt_poll_nitroa0(struct napi_struct *napi, int budget)
if (!TX_CMP_VALID(txcmp, raw_cons))
break;
+ /* The valid test of the entry must be done first before
+ * reading any further.
+ */
+ dma_rmb();
if ((TX_CMP_TYPE(txcmp) & 0x30) == 0x10) {
tmp_raw_cons = NEXT_RAW_CMP(raw_cons);
cp_cons = RING_CMP(tmp_raw_cons);
@@ -9230,10 +9263,9 @@ static void bnxt_disable_napi(struct bnxt *bp)
for (i = 0; i < bp->cp_nr_rings; i++) {
struct bnxt_cp_ring_info *cpr = &bp->bnapi[i]->cp_ring;
+ napi_disable(&bp->bnapi[i]->napi);
if (bp->bnapi[i]->rx_ring)
cancel_work_sync(&cpr->dim.work);
-
- napi_disable(&bp->bnapi[i]->napi);
}
}
@@ -9267,9 +9299,11 @@ void bnxt_tx_disable(struct bnxt *bp)
if (bp->tx_ring) {
for (i = 0; i < bp->tx_nr_rings; i++) {
txr = &bp->tx_ring[i];
- txr->dev_state = BNXT_DEV_STATE_CLOSING;
+ WRITE_ONCE(txr->dev_state, BNXT_DEV_STATE_CLOSING);
}
}
+ /* Make sure napi polls see @dev_state change */
+ synchronize_net();
/* Drop carrier first to prevent TX timeout */
netif_carrier_off(bp->dev);
/* Stop all TX queues */
@@ -9283,8 +9317,10 @@ void bnxt_tx_enable(struct bnxt *bp)
for (i = 0; i < bp->tx_nr_rings; i++) {
txr = &bp->tx_ring[i];
- txr->dev_state = 0;
+ WRITE_ONCE(txr->dev_state, 0);
}
+ /* Make sure napi polls see @dev_state change */
+ synchronize_net();
netif_tx_wake_all_queues(bp->dev);
if (bp->link_info.link_up)
netif_carrier_on(bp->dev);
@@ -10863,6 +10899,9 @@ static bool bnxt_rfs_supported(struct bnxt *bp)
return true;
return false;
}
+ /* 212 firmware is broken for aRFS */
+ if (BNXT_FW_MAJ(bp) == 212)
+ return false;
if (BNXT_PF(bp) && !BNXT_CHIP_TYPE_NITRO_A0(bp))
return true;
if (bp->flags & BNXT_FLAG_NEW_RSS_CAP)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 9c3324e76ff7..7b989b6e4f6e 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -799,6 +799,7 @@ struct bnxt_tx_ring_info {
u16 tx_prod;
u16 tx_cons;
u16 txq_index;
+ u8 kick_pending;
struct bnxt_db_info tx_db;
struct tx_bd *tx_desc_ring[MAX_TX_PAGES];
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-03 20:24:13 +0300