bnxt_en: Centralize logic to reserve rings.
Currently, bnxt_setup_tc() and bnxt_set_channels() have similar and
duplicated code to check and reserve rx and tx rings. Add a new
function bnxt_reserve_rings() to centralize the logic. This will
make it easier to add XDP_TX support which requires allocating a
new set of TX rings.
Also, the tx ring checking logic in bnxt_setup_msix() can be removed.
The rings have been reserved before hand.
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 24818e1..6f2568d 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -387,10 +387,9 @@ static int bnxt_set_channels(struct net_device *dev,
struct ethtool_channels *channel)
{
struct bnxt *bp = netdev_priv(dev);
- int max_rx_rings, max_tx_rings, tcs;
- int req_tx_rings, rsv_tx_rings;
- u32 rc = 0;
+ int req_tx_rings, req_rx_rings, tcs;
bool sh = false;
+ int rc = 0;
if (channel->other_count)
return -EINVAL;
@@ -410,32 +409,14 @@ static int bnxt_set_channels(struct net_device *dev,
if (channel->combined_count)
sh = true;
- bnxt_get_max_rings(bp, &max_rx_rings, &max_tx_rings, sh);
-
tcs = netdev_get_num_tc(dev);
- if (tcs > 1)
- max_tx_rings /= tcs;
-
- if (sh &&
- channel->combined_count > max_t(int, max_rx_rings, max_tx_rings))
- return -ENOMEM;
-
- if (!sh && (channel->rx_count > max_rx_rings ||
- channel->tx_count > max_tx_rings))
- return -ENOMEM;
req_tx_rings = sh ? channel->combined_count : channel->tx_count;
- req_tx_rings = min_t(int, req_tx_rings, max_tx_rings);
- if (tcs > 1)
- req_tx_rings *= tcs;
-
- rsv_tx_rings = req_tx_rings;
- if (bnxt_hwrm_reserve_tx_rings(bp, &rsv_tx_rings))
- return -ENOMEM;
-
- if (rsv_tx_rings < req_tx_rings) {
- netdev_warn(dev, "Unable to allocate the requested tx rings\n");
- return -ENOMEM;
+ req_rx_rings = sh ? channel->combined_count : channel->rx_count;
+ rc = bnxt_reserve_rings(bp, req_tx_rings, req_rx_rings, tcs);
+ if (rc) {
+ netdev_warn(dev, "Unable to allocate the requested rings\n");
+ return rc;
}
if (netif_running(dev)) {
@@ -454,10 +435,8 @@ static int bnxt_set_channels(struct net_device *dev,
if (sh) {
bp->flags |= BNXT_FLAG_SHARED_RINGS;
- bp->rx_nr_rings = min_t(int, channel->combined_count,
- max_rx_rings);
- bp->tx_nr_rings_per_tc = min_t(int, channel->combined_count,
- max_tx_rings);
+ bp->rx_nr_rings = channel->combined_count;
+ bp->tx_nr_rings_per_tc = channel->combined_count;
} else {
bp->flags &= ~BNXT_FLAG_SHARED_RINGS;
bp->rx_nr_rings = channel->rx_count;