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Date: Tue, 4 Jun 2024 08:28:19 +0100
From: Paul Barker <paul.barker.ct@...renesas.com>
To: Sergey Shtylyov <s.shtylyov@....ru>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Niklas Söderlund <niklas.soderlund+renesas@...natech.se>,
Simon Horman <horms@...nel.org>
Cc: Paul Barker <paul.barker.ct@...renesas.com>,
Biju Das <biju.das.jz@...renesas.com>,
Claudiu Beznea <claudiu.beznea.uj@...renesas.com>,
Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
netdev@...r.kernel.org,
linux-renesas-soc@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [net-next PATCH v5 1/7] net: ravb: Simplify poll & receive functions
We don't need to pass the work budget to ravb_rx() by reference, it's
cleaner to pass this by value and return the amount of work done. This
allows us to simplify the ravb_poll() function and use the common
`work_done` variable name seen in other network drivers for consistency
and ease of understanding.
This is a pure refactor and should not affect behaviour.
Signed-off-by: Paul Barker <paul.barker.ct@...renesas.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@....ru>
---
Changes v4->v5:
* Added Sergey's Reviewed-by tag.
Changes v3->v4:
* Fixed update of stats->rx_packets in ravb_rx_gbeth() and
ravb_rx_rcar().
drivers/net/ethernet/renesas/ravb.h | 2 +-
drivers/net/ethernet/renesas/ravb_main.c | 27 +++++++++++-------------
2 files changed, 13 insertions(+), 16 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index b48935ec7e28..71de2a7aa27c 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -1039,7 +1039,7 @@ struct ravb_ptp {
};
struct ravb_hw_info {
- bool (*receive)(struct net_device *ndev, int *quota, int q);
+ int (*receive)(struct net_device *ndev, int budget, int q);
void (*set_rate)(struct net_device *ndev);
int (*set_feature)(struct net_device *ndev, netdev_features_t features);
int (*dmac_init)(struct net_device *ndev);
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 4d100283c30f..193ad05383a8 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -759,7 +759,7 @@ static struct sk_buff *ravb_get_skb_gbeth(struct net_device *ndev, int entry,
}
/* Packet receive function for Gigabit Ethernet */
-static bool ravb_rx_gbeth(struct net_device *ndev, int *quota, int q)
+static int ravb_rx_gbeth(struct net_device *ndev, int budget, int q)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
@@ -781,7 +781,7 @@ static bool ravb_rx_gbeth(struct net_device *ndev, int *quota, int q)
for (i = 0; i < limit; i++, priv->cur_rx[q]++) {
entry = priv->cur_rx[q] % priv->num_rx_ring[q];
desc = &priv->rx_ring[q].desc[entry];
- if (rx_packets == *quota || desc->die_dt == DT_FEMPTY)
+ if (rx_packets == budget || desc->die_dt == DT_FEMPTY)
break;
/* Descriptor type must be checked before all other reads */
@@ -882,12 +882,11 @@ static bool ravb_rx_gbeth(struct net_device *ndev, int *quota, int q)
}
stats->rx_packets += rx_packets;
- *quota -= rx_packets;
- return *quota == 0;
+ return rx_packets;
}
/* Packet receive function for Ethernet AVB */
-static bool ravb_rx_rcar(struct net_device *ndev, int *quota, int q)
+static int ravb_rx_rcar(struct net_device *ndev, int budget, int q)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
@@ -906,7 +905,7 @@ static bool ravb_rx_rcar(struct net_device *ndev, int *quota, int q)
for (i = 0; i < limit; i++, priv->cur_rx[q]++) {
entry = priv->cur_rx[q] % priv->num_rx_ring[q];
desc = &priv->rx_ring[q].ex_desc[entry];
- if (rx_packets == *quota || desc->die_dt == DT_FEMPTY)
+ if (rx_packets == budget || desc->die_dt == DT_FEMPTY)
break;
/* Descriptor type must be checked before all other reads */
@@ -992,17 +991,16 @@ static bool ravb_rx_rcar(struct net_device *ndev, int *quota, int q)
}
stats->rx_packets += rx_packets;
- *quota -= rx_packets;
- return *quota == 0;
+ return rx_packets;
}
/* Packet receive function for Ethernet AVB */
-static bool ravb_rx(struct net_device *ndev, int *quota, int q)
+static int ravb_rx(struct net_device *ndev, int budget, int q)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
- return info->receive(ndev, quota, q);
+ return info->receive(ndev, budget, q);
}
static void ravb_rcv_snd_disable(struct net_device *ndev)
@@ -1319,13 +1317,12 @@ static int ravb_poll(struct napi_struct *napi, int budget)
unsigned long flags;
int q = napi - priv->napi;
int mask = BIT(q);
- int quota = budget;
- bool unmask;
+ int work_done;
/* Processing RX Descriptor Ring */
/* Clear RX interrupt */
ravb_write(ndev, ~(mask | RIS0_RESERVED), RIS0);
- unmask = !ravb_rx(ndev, "a, q);
+ work_done = ravb_rx(ndev, budget, q);
/* Processing TX Descriptor Ring */
spin_lock_irqsave(&priv->lock, flags);
@@ -1344,7 +1341,7 @@ static int ravb_poll(struct napi_struct *napi, int budget)
if (priv->rx_fifo_errors != ndev->stats.rx_fifo_errors)
ndev->stats.rx_fifo_errors = priv->rx_fifo_errors;
- if (!unmask)
+ if (work_done == budget)
goto out;
napi_complete(napi);
@@ -1361,7 +1358,7 @@ static int ravb_poll(struct napi_struct *napi, int budget)
spin_unlock_irqrestore(&priv->lock, flags);
out:
- return budget - quota;
+ return work_done;
}
static void ravb_set_duplex_gbeth(struct net_device *ndev)
--
2.39.2
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