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Message-Id: <20231204012058.3876078-3-yoshihiro.shimoda.uh@renesas.com>
Date: Mon, 4 Dec 2023 10:20:51 +0900
From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
To: s.shtylyov@....ru,
davem@...emloft.net,
edumazet@...gle.com,
kuba@...nel.org,
pabeni@...hat.com
Cc: netdev@...r.kernel.org,
linux-renesas-soc@...r.kernel.org,
Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
Subject: [PATCH net-next v3 2/9] net: rswitch: Use unsigned int for desc related array index
Array index should not be negative, so use unsigned int for
descriptors related array index.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
---
drivers/net/ethernet/renesas/Makefile | 1 -
drivers/net/ethernet/renesas/rswitch.c | 88 ++++++++++++++------------
drivers/net/ethernet/renesas/rswitch.h | 14 ++--
3 files changed, 56 insertions(+), 47 deletions(-)
diff --git a/drivers/net/ethernet/renesas/Makefile b/drivers/net/ethernet/renesas/Makefile
index 9070acfd6aaf..f9cfd9750c1c 100644
--- a/drivers/net/ethernet/renesas/Makefile
+++ b/drivers/net/ethernet/renesas/Makefile
@@ -2,7 +2,6 @@
#
# Makefile for the Renesas network device drivers
#
-
obj-$(CONFIG_SH_ETH) += sh_eth.o
ravb-objs := ravb_main.o ravb_ptp.o
diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c
index 8c03c0e18003..0928003ad245 100644
--- a/drivers/net/ethernet/renesas/rswitch.c
+++ b/drivers/net/ethernet/renesas/rswitch.c
@@ -56,7 +56,8 @@ static void rswitch_clock_disable(struct rswitch_private *priv)
iowrite32(RCDC_RCD, priv->addr + RCDC);
}
-static bool rswitch_agent_clock_is_enabled(void __iomem *coma_addr, int port)
+static bool rswitch_agent_clock_is_enabled(void __iomem *coma_addr,
+ unsigned int port)
{
u32 val = ioread32(coma_addr + RCEC);
@@ -66,7 +67,8 @@ static bool rswitch_agent_clock_is_enabled(void __iomem *coma_addr, int port)
return false;
}
-static void rswitch_agent_clock_ctrl(void __iomem *coma_addr, int port, int enable)
+static void rswitch_agent_clock_ctrl(void __iomem *coma_addr, unsigned int port,
+ int enable)
{
u32 val;
@@ -100,7 +102,7 @@ static void rswitch_coma_init(struct rswitch_private *priv)
/* R-Switch-2 block (TOP) */
static void rswitch_top_init(struct rswitch_private *priv)
{
- int i;
+ unsigned int i;
for (i = 0; i < RSWITCH_MAX_NUM_QUEUES; i++)
iowrite32((i / 16) << (GWCA_INDEX * 8), priv->addr + TPEMIMC7(i));
@@ -109,7 +111,7 @@ static void rswitch_top_init(struct rswitch_private *priv)
/* Forwarding engine block (MFWD) */
static void rswitch_fwd_init(struct rswitch_private *priv)
{
- int i;
+ unsigned int i;
/* For ETHA */
for (i = 0; i < RSWITCH_NUM_PORTS; i++) {
@@ -166,7 +168,7 @@ static int rswitch_gwca_axi_ram_reset(struct rswitch_private *priv)
static bool rswitch_is_any_data_irq(struct rswitch_private *priv, u32 *dis, bool tx)
{
u32 *mask = tx ? priv->gwca.tx_irq_bits : priv->gwca.rx_irq_bits;
- int i;
+ unsigned int i;
for (i = 0; i < RSWITCH_NUM_IRQ_REGS; i++) {
if (dis[i] & mask[i])
@@ -178,7 +180,7 @@ static bool rswitch_is_any_data_irq(struct rswitch_private *priv, u32 *dis, bool
static void rswitch_get_data_irq_status(struct rswitch_private *priv, u32 *dis)
{
- int i;
+ unsigned int i;
for (i = 0; i < RSWITCH_NUM_IRQ_REGS; i++) {
dis[i] = ioread32(priv->addr + GWDIS(i));
@@ -186,23 +188,26 @@ static void rswitch_get_data_irq_status(struct rswitch_private *priv, u32 *dis)
}
}
-static void rswitch_enadis_data_irq(struct rswitch_private *priv, int index, bool enable)
+static void rswitch_enadis_data_irq(struct rswitch_private *priv,
+ unsigned int index, bool enable)
{
u32 offs = enable ? GWDIE(index / 32) : GWDID(index / 32);
iowrite32(BIT(index % 32), priv->addr + offs);
}
-static void rswitch_ack_data_irq(struct rswitch_private *priv, int index)
+static void rswitch_ack_data_irq(struct rswitch_private *priv,
+ unsigned int index)
{
u32 offs = GWDIS(index / 32);
iowrite32(BIT(index % 32), priv->addr + offs);
}
-static int rswitch_next_queue_index(struct rswitch_gwca_queue *gq, bool cur, int num)
+static unsigned int rswitch_next_queue_index(struct rswitch_gwca_queue *gq,
+ bool cur, unsigned int num)
{
- int index = cur ? gq->cur : gq->dirty;
+ unsigned int index = cur ? gq->cur : gq->dirty;
if (index + num >= gq->ring_size)
index = (index + num) % gq->ring_size;
@@ -212,7 +217,7 @@ static int rswitch_next_queue_index(struct rswitch_gwca_queue *gq, bool cur, int
return index;
}
-static int rswitch_get_num_cur_queues(struct rswitch_gwca_queue *gq)
+static unsigned int rswitch_get_num_cur_queues(struct rswitch_gwca_queue *gq)
{
if (gq->cur >= gq->dirty)
return gq->cur - gq->dirty;
@@ -231,9 +236,10 @@ static bool rswitch_is_queue_rxed(struct rswitch_gwca_queue *gq)
}
static int rswitch_gwca_queue_alloc_skb(struct rswitch_gwca_queue *gq,
- int start_index, int num)
+ unsigned int start_index,
+ unsigned int num)
{
- int i, index;
+ unsigned int i, index;
for (i = 0; i < num; i++) {
index = (i + start_index) % gq->ring_size;
@@ -248,7 +254,7 @@ static int rswitch_gwca_queue_alloc_skb(struct rswitch_gwca_queue *gq,
return 0;
err:
- for (i--; i >= 0; i--) {
+ for (; i-- > 0; ) {
index = (i + start_index) % gq->ring_size;
dev_kfree_skb(gq->skbs[index]);
gq->skbs[index] = NULL;
@@ -260,7 +266,7 @@ static int rswitch_gwca_queue_alloc_skb(struct rswitch_gwca_queue *gq,
static void rswitch_gwca_queue_free(struct net_device *ndev,
struct rswitch_gwca_queue *gq)
{
- int i;
+ unsigned int i;
if (!gq->dir_tx) {
dma_free_coherent(ndev->dev.parent,
@@ -294,9 +300,9 @@ static void rswitch_gwca_ts_queue_free(struct rswitch_private *priv)
static int rswitch_gwca_queue_alloc(struct net_device *ndev,
struct rswitch_private *priv,
struct rswitch_gwca_queue *gq,
- bool dir_tx, int ring_size)
+ bool dir_tx, unsigned int ring_size)
{
- int i, bit;
+ unsigned int i, bit;
gq->dir_tx = dir_tx;
gq->ring_size = ring_size;
@@ -351,11 +357,11 @@ static int rswitch_gwca_queue_format(struct net_device *ndev,
struct rswitch_private *priv,
struct rswitch_gwca_queue *gq)
{
- int ring_size = sizeof(struct rswitch_ext_desc) * gq->ring_size;
+ unsigned int ring_size = sizeof(struct rswitch_ext_desc) * gq->ring_size;
struct rswitch_ext_desc *desc;
struct rswitch_desc *linkfix;
dma_addr_t dma_addr;
- int i;
+ unsigned int i;
memset(gq->tx_ring, 0, ring_size);
for (i = 0, desc = gq->tx_ring; i < gq->ring_size; i++, desc++) {
@@ -387,7 +393,7 @@ static int rswitch_gwca_queue_format(struct net_device *ndev,
err:
if (!gq->dir_tx) {
- for (i--, desc = gq->tx_ring; i >= 0; i--, desc++) {
+ for (desc = gq->tx_ring; i-- > 0; desc++) {
dma_addr = rswitch_desc_get_dptr(&desc->desc);
dma_unmap_single(ndev->dev.parent, dma_addr, PKT_BUF_SZ,
DMA_FROM_DEVICE);
@@ -398,11 +404,12 @@ static int rswitch_gwca_queue_format(struct net_device *ndev,
}
static void rswitch_gwca_ts_queue_fill(struct rswitch_private *priv,
- int start_index, int num)
+ unsigned int start_index,
+ unsigned int num)
{
struct rswitch_gwca_queue *gq = &priv->gwca.ts_queue;
struct rswitch_ts_desc *desc;
- int i, index;
+ unsigned int i, index;
for (i = 0; i < num; i++) {
index = (i + start_index) % gq->ring_size;
@@ -413,12 +420,13 @@ static void rswitch_gwca_ts_queue_fill(struct rswitch_private *priv,
static int rswitch_gwca_queue_ext_ts_fill(struct net_device *ndev,
struct rswitch_gwca_queue *gq,
- int start_index, int num)
+ unsigned int start_index,
+ unsigned int num)
{
struct rswitch_device *rdev = netdev_priv(ndev);
struct rswitch_ext_ts_desc *desc;
+ unsigned int i, index;
dma_addr_t dma_addr;
- int i, index;
for (i = 0; i < num; i++) {
index = (i + start_index) % gq->ring_size;
@@ -444,7 +452,7 @@ static int rswitch_gwca_queue_ext_ts_fill(struct net_device *ndev,
err:
if (!gq->dir_tx) {
- for (i--; i >= 0; i--) {
+ for (; i-- > 0; ) {
index = (i + start_index) % gq->ring_size;
desc = &gq->rx_ring[index];
dma_addr = rswitch_desc_get_dptr(&desc->desc);
@@ -460,7 +468,7 @@ static int rswitch_gwca_queue_ext_ts_format(struct net_device *ndev,
struct rswitch_private *priv,
struct rswitch_gwca_queue *gq)
{
- int ring_size = sizeof(struct rswitch_ext_ts_desc) * gq->ring_size;
+ unsigned int ring_size = sizeof(struct rswitch_ext_ts_desc) * gq->ring_size;
struct rswitch_ext_ts_desc *desc;
struct rswitch_desc *linkfix;
int err;
@@ -487,7 +495,7 @@ static int rswitch_gwca_queue_ext_ts_format(struct net_device *ndev,
static int rswitch_gwca_linkfix_alloc(struct rswitch_private *priv)
{
- int i, num_queues = priv->gwca.num_queues;
+ unsigned int i, num_queues = priv->gwca.num_queues;
struct rswitch_gwca *gwca = &priv->gwca;
struct device *dev = &priv->pdev->dev;
@@ -537,7 +545,7 @@ static int rswitch_gwca_ts_queue_alloc(struct rswitch_private *priv)
static struct rswitch_gwca_queue *rswitch_gwca_get(struct rswitch_private *priv)
{
struct rswitch_gwca_queue *gq;
- int index;
+ unsigned int index;
index = find_first_zero_bit(priv->gwca.used, priv->gwca.num_queues);
if (index >= priv->gwca.num_queues)
@@ -583,7 +591,7 @@ static void rswitch_txdmac_free(struct net_device *ndev)
rswitch_gwca_put(rdev->priv, rdev->tx_queue);
}
-static int rswitch_txdmac_init(struct rswitch_private *priv, int index)
+static int rswitch_txdmac_init(struct rswitch_private *priv, unsigned int index)
{
struct rswitch_device *rdev = priv->rdev[index];
@@ -617,7 +625,7 @@ static void rswitch_rxdmac_free(struct net_device *ndev)
rswitch_gwca_put(rdev->priv, rdev->rx_queue);
}
-static int rswitch_rxdmac_init(struct rswitch_private *priv, int index)
+static int rswitch_rxdmac_init(struct rswitch_private *priv, unsigned int index)
{
struct rswitch_device *rdev = priv->rdev[index];
struct net_device *ndev = rdev->ndev;
@@ -627,7 +635,8 @@ static int rswitch_rxdmac_init(struct rswitch_private *priv, int index)
static int rswitch_gwca_hw_init(struct rswitch_private *priv)
{
- int i, err;
+ unsigned int i;
+ int err;
err = rswitch_gwca_change_mode(priv, GWMC_OPC_DISABLE);
if (err < 0)
@@ -698,9 +707,10 @@ static bool rswitch_rx(struct net_device *ndev, int *quota)
struct rswitch_device *rdev = netdev_priv(ndev);
struct rswitch_gwca_queue *gq = rdev->rx_queue;
struct rswitch_ext_ts_desc *desc;
- int limit, boguscnt, num, ret;
+ int limit, boguscnt, ret;
struct sk_buff *skb;
dma_addr_t dma_addr;
+ unsigned int num;
u16 pkt_len;
u32 get_ts;
@@ -768,7 +778,7 @@ static void rswitch_tx_free(struct net_device *ndev)
struct rswitch_ext_desc *desc;
dma_addr_t dma_addr;
struct sk_buff *skb;
- int size;
+ unsigned int size;
for (; rswitch_get_num_cur_queues(gq) > 0;
gq->dirty = rswitch_next_queue_index(gq, false, 1)) {
@@ -847,7 +857,7 @@ static void rswitch_queue_interrupt(struct net_device *ndev)
static irqreturn_t rswitch_data_irq(struct rswitch_private *priv, u32 *dis)
{
struct rswitch_gwca_queue *gq;
- int i, index, bit;
+ unsigned int i, index, bit;
for (i = 0; i < priv->gwca.num_queues; i++) {
gq = &priv->gwca.queues[i];
@@ -914,8 +924,8 @@ static void rswitch_ts(struct rswitch_private *priv)
struct skb_shared_hwtstamps shhwtstamps;
struct rswitch_ts_desc *desc;
struct timespec64 ts;
+ unsigned int num;
u32 tag, port;
- int num;
desc = &gq->ts_ring[gq->cur];
while ((desc->desc.die_dt & DT_MASK) != DT_FEMPTY_ND) {
@@ -1434,7 +1444,7 @@ static int rswitch_ether_port_init_all(struct rswitch_private *priv)
static void rswitch_ether_port_deinit_all(struct rswitch_private *priv)
{
- int i;
+ unsigned int i;
for (i = 0; i < RSWITCH_NUM_PORTS; i++) {
phy_exit(priv->rdev[i]->serdes);
@@ -1689,7 +1699,7 @@ static const struct of_device_id renesas_eth_sw_of_table[] = {
};
MODULE_DEVICE_TABLE(of, renesas_eth_sw_of_table);
-static void rswitch_etha_init(struct rswitch_private *priv, int index)
+static void rswitch_etha_init(struct rswitch_private *priv, unsigned int index)
{
struct rswitch_etha *etha = &priv->etha[index];
@@ -1705,7 +1715,7 @@ static void rswitch_etha_init(struct rswitch_private *priv, int index)
etha->psmcs = clk_get_rate(priv->clk) / 100000 / (25 * 2) - 1;
}
-static int rswitch_device_alloc(struct rswitch_private *priv, int index)
+static int rswitch_device_alloc(struct rswitch_private *priv, unsigned int index)
{
struct platform_device *pdev = priv->pdev;
struct rswitch_device *rdev;
@@ -1776,7 +1786,7 @@ static int rswitch_device_alloc(struct rswitch_private *priv, int index)
return err;
}
-static void rswitch_device_free(struct rswitch_private *priv, int index)
+static void rswitch_device_free(struct rswitch_private *priv, unsigned int index)
{
struct rswitch_device *rdev = priv->rdev[index];
struct net_device *ndev = rdev->ndev;
diff --git a/drivers/net/ethernet/renesas/rswitch.h b/drivers/net/ethernet/renesas/rswitch.h
index 27c9d3872c0e..f1c7f7cdefc2 100644
--- a/drivers/net/ethernet/renesas/rswitch.h
+++ b/drivers/net/ethernet/renesas/rswitch.h
@@ -909,7 +909,7 @@ struct rswitch_ext_ts_desc {
} __packed;
struct rswitch_etha {
- int index;
+ unsigned int index;
void __iomem *addr;
void __iomem *coma_addr;
bool external_phy;
@@ -938,12 +938,12 @@ struct rswitch_gwca_queue {
/* Common */
dma_addr_t ring_dma;
- int ring_size;
- int cur;
- int dirty;
+ unsigned int ring_size;
+ unsigned int cur;
+ unsigned int dirty;
- /* For [rt]_ring */
- int index;
+ /* For [rt]x_ring */
+ unsigned int index;
bool dir_tx;
struct sk_buff **skbs;
struct net_device *ndev; /* queue to ndev for irq */
@@ -959,7 +959,7 @@ struct rswitch_gwca_ts_info {
#define RSWITCH_NUM_IRQ_REGS (RSWITCH_MAX_NUM_QUEUES / BITS_PER_TYPE(u32))
struct rswitch_gwca {
- int index;
+ unsigned int index;
struct rswitch_desc *linkfix_table;
dma_addr_t linkfix_table_dma;
u32 linkfix_table_size;
--
2.34.1
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