CHECK drivers/net/wan/fsl_ucc_hdlc.c drivers/net/wan/fsl_ucc_hdlc.c:309:57: warning: incorrect type in argument 2 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:309:57: expected void [noderef] __iomem * drivers/net/wan/fsl_ucc_hdlc.c:309:57: got restricted __be16 * drivers/net/wan/fsl_ucc_hdlc.c:311:46: warning: incorrect type in argument 2 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:311:46: expected void [noderef] __iomem * drivers/net/wan/fsl_ucc_hdlc.c:311:46: got restricted __be32 * drivers/net/wan/fsl_ucc_hdlc.c:320:57: warning: incorrect type in argument 2 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:320:57: expected void [noderef] __iomem * drivers/net/wan/fsl_ucc_hdlc.c:320:57: got restricted __be16 * drivers/net/wan/fsl_ucc_hdlc.c:322:46: warning: incorrect type in argument 2 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:322:46: expected void [noderef] __iomem * drivers/net/wan/fsl_ucc_hdlc.c:322:46: got restricted __be32 * drivers/net/wan/fsl_ucc_hdlc.c:372:29: warning: incorrect type in assignment (different base types) drivers/net/wan/fsl_ucc_hdlc.c:372:29: expected unsigned short [usertype] drivers/net/wan/fsl_ucc_hdlc.c:372:29: got restricted __be16 [usertype] drivers/net/wan/fsl_ucc_hdlc.c:379:36: warning: restricted __be16 degrades to integer drivers/net/wan/fsl_ucc_hdlc.c:402:12: warning: incorrect type in assignment (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:402:12: expected struct qe_bd [noderef] __iomem *bd drivers/net/wan/fsl_ucc_hdlc.c:402:12: got struct qe_bd *curtx_bd drivers/net/wan/fsl_ucc_hdlc.c:425:20: warning: incorrect type in assignment (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:425:20: expected struct qe_bd [noderef] __iomem *[assigned] bd drivers/net/wan/fsl_ucc_hdlc.c:425:20: got struct qe_bd *tx_bd_base drivers/net/wan/fsl_ucc_hdlc.c:427:16: error: incompatible types in comparison expression (different address spaces): drivers/net/wan/fsl_ucc_hdlc.c:427:16: struct qe_bd [noderef] __iomem * drivers/net/wan/fsl_ucc_hdlc.c:427:16: struct qe_bd * drivers/net/wan/fsl_ucc_hdlc.c:462:33: warning: incorrect type in argument 1 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:506:41: warning: incorrect type in argument 1 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:528:33: warning: incorrect type in argument 1 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:552:38: warning: incorrect type in argument 1 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:596:67: warning: incorrect type in argument 2 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:611:41: warning: incorrect type in argument 1 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:851:38: warning: incorrect type in initializer (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:854:40: warning: incorrect type in argument 1 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:855:40: warning: incorrect type in argument 1 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:858:39: warning: incorrect type in argument 1 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:861:37: warning: incorrect type in argument 2 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:866:38: warning: incorrect type in initializer (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:868:21: warning: incorrect type in argument 1 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:870:40: warning: incorrect type in argument 2 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:871:40: warning: incorrect type in argument 2 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:873:39: warning: incorrect type in argument 2 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:993:57: warning: incorrect type in argument 2 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:995:46: warning: incorrect type in argument 2 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:1004:57: warning: incorrect type in argument 2 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:1006:46: warning: incorrect type in argument 2 (different address spaces) drivers/net/wan/fsl_ucc_hdlc.c:412:35: warning: dereference of noderef expression drivers/net/wan/fsl_ucc_hdlc.c:412:35: warning: dereference of noderef expression drivers/net/wan/fsl_ucc_hdlc.c:724:29: warning: dereference of noderef expression drivers/net/wan/fsl_ucc_hdlc.c:815:21: warning: dereference of noderef expression drivers/net/wan/fsl_ucc_hdlc.c:1021:29: warning: dereference of noderef expression
Most of the warnings are due to DMA memory being incorrectly handled as IO memory. Fix it by doing direct read/write and doing proper dma_rmb() / dma_wmb(). Other problems are type mismatches or lack of use of IO accessors. Cc: Rasmus Villemoes <li...@rasmusvillemoes.dk> Reported-by: kernel test robot <l...@intel.com> Link: https://lkml.org/lkml/2021/11/12/647 Signed-off-by: Christophe Leroy <christophe.le...@csgroup.eu> --- drivers/net/wan/fsl_ucc_hdlc.c | 62 ++++++++++++++++++---------------- 1 file changed, 32 insertions(+), 30 deletions(-) diff --git a/drivers/net/wan/fsl_ucc_hdlc.c b/drivers/net/wan/fsl_ucc_hdlc.c index cda1b4ce6b21..5ae2d27b5da9 100644 --- a/drivers/net/wan/fsl_ucc_hdlc.c +++ b/drivers/net/wan/fsl_ucc_hdlc.c @@ -306,9 +306,8 @@ static int uhdlc_init(struct ucc_hdlc_private *priv) else bd_status = R_E_S | R_I_S | R_W_S; - iowrite16be(bd_status, &priv->rx_bd_base[i].status); - iowrite32be(priv->dma_rx_addr + i * MAX_RX_BUF_LENGTH, - &priv->rx_bd_base[i].buf); + priv->rx_bd_base[i].status = cpu_to_be16(bd_status); + priv->rx_bd_base[i].buf = cpu_to_be32(priv->dma_rx_addr + i * MAX_RX_BUF_LENGTH); } for (i = 0; i < TX_BD_RING_LEN; i++) { @@ -317,10 +316,10 @@ static int uhdlc_init(struct ucc_hdlc_private *priv) else bd_status = T_I_S | T_TC_S | T_W_S; - iowrite16be(bd_status, &priv->tx_bd_base[i].status); - iowrite32be(priv->dma_tx_addr + i * MAX_RX_BUF_LENGTH, - &priv->tx_bd_base[i].buf); + priv->tx_bd_base[i].status = cpu_to_be16(bd_status); + priv->tx_bd_base[i].buf = cpu_to_be32(priv->dma_tx_addr + i * MAX_RX_BUF_LENGTH); } + dma_wmb(); return 0; @@ -352,10 +351,10 @@ static netdev_tx_t ucc_hdlc_tx(struct sk_buff *skb, struct net_device *dev) { hdlc_device *hdlc = dev_to_hdlc(dev); struct ucc_hdlc_private *priv = (struct ucc_hdlc_private *)hdlc->priv; - struct qe_bd __iomem *bd; + struct qe_bd *bd; u16 bd_status; unsigned long flags; - u16 *proto_head; + __be16 *proto_head; switch (dev->type) { case ARPHRD_RAWHDLC: @@ -368,14 +367,14 @@ static netdev_tx_t ucc_hdlc_tx(struct sk_buff *skb, struct net_device *dev) skb_push(skb, HDLC_HEAD_LEN); - proto_head = (u16 *)skb->data; + proto_head = (__be16 *)skb->data; *proto_head = htons(DEFAULT_HDLC_HEAD); dev->stats.tx_bytes += skb->len; break; case ARPHRD_PPP: - proto_head = (u16 *)skb->data; + proto_head = (__be16 *)skb->data; if (*proto_head != htons(DEFAULT_PPP_HEAD)) { dev->stats.tx_dropped++; dev_kfree_skb(skb); @@ -398,9 +397,10 @@ static netdev_tx_t ucc_hdlc_tx(struct sk_buff *skb, struct net_device *dev) netdev_sent_queue(dev, skb->len); spin_lock_irqsave(&priv->lock, flags); + dma_rmb(); /* Start from the next BD that should be filled */ bd = priv->curtx_bd; - bd_status = ioread16be(&bd->status); + bd_status = be16_to_cpu(bd->status); /* Save the skb pointer so we can free it later */ priv->tx_skbuff[priv->skb_curtx] = skb; @@ -415,8 +415,8 @@ static netdev_tx_t ucc_hdlc_tx(struct sk_buff *skb, struct net_device *dev) /* set bd status and length */ bd_status = (bd_status & T_W_S) | T_R_S | T_I_S | T_L_S | T_TC_S; - iowrite16be(skb->len, &bd->length); - iowrite16be(bd_status, &bd->status); + bd->length = cpu_to_be16(skb->len); + bd->status = cpu_to_be16(bd_status); /* Move to next BD in the ring */ if (!(bd_status & T_W_S)) @@ -458,8 +458,9 @@ static int hdlc_tx_done(struct ucc_hdlc_private *priv) u16 bd_status; int tx_restart = 0; + dma_rmb(); bd = priv->dirty_tx; - bd_status = ioread16be(&bd->status); + bd_status = be16_to_cpu(bd->status); /* Normal processing. */ while ((bd_status & T_R_S) == 0) { @@ -503,7 +504,7 @@ static int hdlc_tx_done(struct ucc_hdlc_private *priv) bd += 1; else bd = priv->tx_bd_base; - bd_status = ioread16be(&bd->status); + bd_status = be16_to_cpu(bd->status); } priv->dirty_tx = bd; @@ -524,8 +525,9 @@ static int hdlc_rx_done(struct ucc_hdlc_private *priv, int rx_work_limit) u16 length, howmany = 0; u8 *bdbuffer; + dma_rmb(); bd = priv->currx_bd; - bd_status = ioread16be(&bd->status); + bd_status = be16_to_cpu(bd->status); /* while there are received buffers and BD is full (~R_E) */ while (!((bd_status & (R_E_S)) || (--rx_work_limit < 0))) { @@ -549,7 +551,7 @@ static int hdlc_rx_done(struct ucc_hdlc_private *priv, int rx_work_limit) } bdbuffer = priv->rx_buffer + (priv->currx_bdnum * MAX_RX_BUF_LENGTH); - length = ioread16be(&bd->length); + length = be16_to_cpu(bd->length); switch (dev->type) { case ARPHRD_RAWHDLC: @@ -593,7 +595,7 @@ static int hdlc_rx_done(struct ucc_hdlc_private *priv, int rx_work_limit) netif_receive_skb(skb); recycle: - iowrite16be((bd_status & R_W_S) | R_E_S | R_I_S, &bd->status); + bd->status = cpu_to_be16((bd_status & R_W_S) | R_E_S | R_I_S); /* update to point at the next bd */ if (bd_status & R_W_S) { @@ -608,8 +610,9 @@ static int hdlc_rx_done(struct ucc_hdlc_private *priv, int rx_work_limit) bd += 1; } - bd_status = ioread16be(&bd->status); + bd_status = be16_to_cpu(bd->status); } + dma_rmb(); priv->currx_bd = bd; return howmany; @@ -721,7 +724,7 @@ static int uhdlc_open(struct net_device *dev) /* Enable the TDM port */ if (priv->tsa) - utdm->si_regs->siglmr1_h |= (0x1 << utdm->tdm_port); + qe_setbits_8(&utdm->si_regs->siglmr1_h, 0x1 << utdm->tdm_port); priv->hdlc_busy = 1; netif_device_attach(priv->ndev); @@ -812,7 +815,7 @@ static int uhdlc_close(struct net_device *dev) (u8)QE_CR_PROTOCOL_UNSPECIFIED, 0); if (priv->tsa) - utdm->si_regs->siglmr1_h &= ~(0x1 << utdm->tdm_port); + qe_clrbits_8(&utdm->si_regs->siglmr1_h, 0x1 << utdm->tdm_port); ucc_fast_disable(priv->uccf, COMM_DIR_RX | COMM_DIR_TX); @@ -848,7 +851,7 @@ static int ucc_hdlc_attach(struct net_device *dev, unsigned short encoding, #ifdef CONFIG_PM static void store_clk_config(struct ucc_hdlc_private *priv) { - struct qe_mux *qe_mux_reg = &qe_immr->qmx; + struct qe_mux __iomem *qe_mux_reg = &qe_immr->qmx; /* store si clk */ priv->cmxsi1cr_h = ioread32be(&qe_mux_reg->cmxsi1cr_h); @@ -863,7 +866,7 @@ static void store_clk_config(struct ucc_hdlc_private *priv) static void resume_clk_config(struct ucc_hdlc_private *priv) { - struct qe_mux *qe_mux_reg = &qe_immr->qmx; + struct qe_mux __iomem *qe_mux_reg = &qe_immr->qmx; memcpy_toio(qe_mux_reg->cmxucr, priv->cmxucr, 4 * sizeof(u32)); @@ -990,9 +993,8 @@ static int uhdlc_resume(struct device *dev) else bd_status = R_E_S | R_I_S | R_W_S; - iowrite16be(bd_status, &priv->rx_bd_base[i].status); - iowrite32be(priv->dma_rx_addr + i * MAX_RX_BUF_LENGTH, - &priv->rx_bd_base[i].buf); + priv->rx_bd_base[i].status = cpu_to_be16(bd_status); + priv->rx_bd_base[i].buf = cpu_to_be32(priv->dma_rx_addr + i * MAX_RX_BUF_LENGTH); } for (i = 0; i < TX_BD_RING_LEN; i++) { @@ -1001,10 +1003,10 @@ static int uhdlc_resume(struct device *dev) else bd_status = T_I_S | T_TC_S | T_W_S; - iowrite16be(bd_status, &priv->tx_bd_base[i].status); - iowrite32be(priv->dma_tx_addr + i * MAX_RX_BUF_LENGTH, - &priv->tx_bd_base[i].buf); + priv->tx_bd_base[i].status = cpu_to_be16(bd_status); + priv->tx_bd_base[i].buf = cpu_to_be32(priv->dma_tx_addr + i * MAX_RX_BUF_LENGTH); } + dma_wmb(); /* if hdlc is busy enable TX and RX */ if (priv->hdlc_busy == 1) { @@ -1018,7 +1020,7 @@ static int uhdlc_resume(struct device *dev) /* Enable the TDM port */ if (priv->tsa) - utdm->si_regs->siglmr1_h |= (0x1 << utdm->tdm_port); + qe_setbits_8(&utdm->si_regs->siglmr1_h, 0x1 << utdm->tdm_port); } napi_enable(&priv->napi); -- 2.31.1
