From patchwork Fri Dec 8 04:10:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 13484745 X-Patchwork-Delegate: geert@linux-m68k.org Received: from relmlie5.idc.renesas.com (relmlor1.renesas.com [210.160.252.171]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 8B9EB1718; Thu, 7 Dec 2023 20:10:40 -0800 (PST) X-IronPort-AV: E=Sophos;i="6.04,259,1695654000"; d="scan'208";a="185740752" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie5.idc.renesas.com with ESMTP; 08 Dec 2023 13:10:37 +0900 Received: from localhost.localdomain (unknown [10.166.13.99]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id 83AC8415E8E5; Fri, 8 Dec 2023 13:10:37 +0900 (JST) From: Yoshihiro Shimoda To: s.shtylyov@omp.ru, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: netdev@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Yoshihiro Shimoda Subject: [PATCH net-next v5 2/9] net: rswitch: Use unsigned int for desc related array index Date: Fri, 8 Dec 2023 13:10:23 +0900 Message-Id: <20231208041030.2497657-3-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231208041030.2497657-1-yoshihiro.shimoda.uh@renesas.com> References: <20231208041030.2497657-1-yoshihiro.shimoda.uh@renesas.com> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Array index should not be negative, so use unsigned int for descriptors related array index. Signed-off-by: Yoshihiro Shimoda --- drivers/net/ethernet/renesas/rswitch.c | 88 ++++++++++++++------------ drivers/net/ethernet/renesas/rswitch.h | 14 ++-- 2 files changed, 56 insertions(+), 46 deletions(-) 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;