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Message-ID: <20191004081031.GP42880@e119886-lin.cambridge.arm.com>
Date: Fri, 4 Oct 2019 09:10:32 +0100
From: Andrew Murray <andrew.murray@....com>
To: Kefeng Wang <wangkefeng.wang@...wei.com>
Cc: linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
Hou Zhiqiang <Zhiqiang.Hou@....com>,
Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
Minghuan Lian <Minghuan.Lian@....com>,
Subrahmanya Lingappa <l.subrahmanya@...iveil.co.in>
Subject: Re: [PATCH v3] PCI: mobiveil: Fix csr_read/write build issue
On Fri, Oct 04, 2019 at 12:19:25PM +0800, Kefeng Wang wrote:
> The riscv has csr_read/write macro, see arch/riscv/include/asm/csr.h,
> the same function naming will cause build error, using such generic names
> in a driver is bad, rename csr_[read,write][l,] to mobiveil_csr_read/write
> to fix it.
>
> drivers/pci/controller/pcie-mobiveil.c:238:69: error: macro "csr_read" passed 3 arguments, but takes just 1
> static u32 csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size)
>
> drivers/pci/controller/pcie-mobiveil.c:253:80: error: macro "csr_write" passed 4 arguments, but takes just 2
> static void csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off, size_t size)
>
> Cc: Hou Zhiqiang <Zhiqiang.Hou@....com>
> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
> Cc: Minghuan Lian <Minghuan.Lian@....com>
> Cc: Subrahmanya Lingappa <l.subrahmanya@...iveil.co.in>
> Cc: Andrew Murray <andrew.murray@....com>
> Fixes: bcbe0d9a8d93 ("PCI: mobiveil: Unify register accessors")
> Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
> ---
Thanks for the respin:
Reviewed-by: Andrew Murray <andrew.murray@....com>
> v3:
> - reduce line lengths suggested by Andrew
>
> v2:
> - using mobiveil prefix suggested by Andrew and Christoph
>
> drivers/pci/controller/pcie-mobiveil.c | 119 +++++++++++++------------
> 1 file changed, 62 insertions(+), 57 deletions(-)
>
> diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
> index a45a6447b01d..32f37d08d5bc 100644
> --- a/drivers/pci/controller/pcie-mobiveil.c
> +++ b/drivers/pci/controller/pcie-mobiveil.c
> @@ -235,7 +235,7 @@ static int mobiveil_pcie_write(void __iomem *addr, int size, u32 val)
> return PCIBIOS_SUCCESSFUL;
> }
>
> -static u32 csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size)
> +static u32 mobiveil_csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size)
> {
> void *addr;
> u32 val;
> @@ -250,7 +250,8 @@ static u32 csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size)
> return val;
> }
>
> -static void csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off, size_t size)
> +static void mobiveil_csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off,
> + size_t size)
> {
> void *addr;
> int ret;
> @@ -262,19 +263,19 @@ static void csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off, size_t size)
> dev_err(&pcie->pdev->dev, "write CSR address failed\n");
> }
>
> -static u32 csr_readl(struct mobiveil_pcie *pcie, u32 off)
> +static u32 mobiveil_csr_readl(struct mobiveil_pcie *pcie, u32 off)
> {
> - return csr_read(pcie, off, 0x4);
> + return mobiveil_csr_read(pcie, off, 0x4);
> }
>
> -static void csr_writel(struct mobiveil_pcie *pcie, u32 val, u32 off)
> +static void mobiveil_csr_writel(struct mobiveil_pcie *pcie, u32 val, u32 off)
> {
> - csr_write(pcie, val, off, 0x4);
> + mobiveil_csr_write(pcie, val, off, 0x4);
> }
>
> static bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie)
> {
> - return (csr_readl(pcie, LTSSM_STATUS) &
> + return (mobiveil_csr_readl(pcie, LTSSM_STATUS) &
> LTSSM_STATUS_L0_MASK) == LTSSM_STATUS_L0;
> }
>
> @@ -323,7 +324,7 @@ static void __iomem *mobiveil_pcie_map_bus(struct pci_bus *bus,
> PCI_SLOT(devfn) << PAB_DEVICE_SHIFT |
> PCI_FUNC(devfn) << PAB_FUNCTION_SHIFT;
>
> - csr_writel(pcie, value, PAB_AXI_AMAP_PEX_WIN_L(WIN_NUM_0));
> + mobiveil_csr_writel(pcie, value, PAB_AXI_AMAP_PEX_WIN_L(WIN_NUM_0));
>
> return pcie->config_axi_slave_base + where;
> }
> @@ -353,13 +354,14 @@ static void mobiveil_pcie_isr(struct irq_desc *desc)
> chained_irq_enter(chip, desc);
>
> /* read INTx status */
> - val = csr_readl(pcie, PAB_INTP_AMBA_MISC_STAT);
> - mask = csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB);
> + val = mobiveil_csr_readl(pcie, PAB_INTP_AMBA_MISC_STAT);
> + mask = mobiveil_csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB);
> intr_status = val & mask;
>
> /* Handle INTx */
> if (intr_status & PAB_INTP_INTX_MASK) {
> - shifted_status = csr_readl(pcie, PAB_INTP_AMBA_MISC_STAT);
> + shifted_status = mobiveil_csr_readl(pcie,
> + PAB_INTP_AMBA_MISC_STAT);
> shifted_status &= PAB_INTP_INTX_MASK;
> shifted_status >>= PAB_INTX_START;
> do {
> @@ -373,12 +375,13 @@ static void mobiveil_pcie_isr(struct irq_desc *desc)
> bit);
>
> /* clear interrupt handled */
> - csr_writel(pcie, 1 << (PAB_INTX_START + bit),
> - PAB_INTP_AMBA_MISC_STAT);
> + mobiveil_csr_writel(pcie,
> + 1 << (PAB_INTX_START + bit),
> + PAB_INTP_AMBA_MISC_STAT);
> }
>
> - shifted_status = csr_readl(pcie,
> - PAB_INTP_AMBA_MISC_STAT);
> + shifted_status = mobiveil_csr_readl(pcie,
> + PAB_INTP_AMBA_MISC_STAT);
> shifted_status &= PAB_INTP_INTX_MASK;
> shifted_status >>= PAB_INTX_START;
> } while (shifted_status != 0);
> @@ -413,7 +416,7 @@ static void mobiveil_pcie_isr(struct irq_desc *desc)
> }
>
> /* Clear the interrupt status */
> - csr_writel(pcie, intr_status, PAB_INTP_AMBA_MISC_STAT);
> + mobiveil_csr_writel(pcie, intr_status, PAB_INTP_AMBA_MISC_STAT);
> chained_irq_exit(chip, desc);
> }
>
> @@ -474,24 +477,24 @@ static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num,
> return;
> }
>
> - value = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num));
> + value = mobiveil_csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num));
> value &= ~(AMAP_CTRL_TYPE_MASK << AMAP_CTRL_TYPE_SHIFT | WIN_SIZE_MASK);
> value |= type << AMAP_CTRL_TYPE_SHIFT | 1 << AMAP_CTRL_EN_SHIFT |
> (lower_32_bits(size64) & WIN_SIZE_MASK);
> - csr_writel(pcie, value, PAB_PEX_AMAP_CTRL(win_num));
> + mobiveil_csr_writel(pcie, value, PAB_PEX_AMAP_CTRL(win_num));
>
> - csr_writel(pcie, upper_32_bits(size64),
> - PAB_EXT_PEX_AMAP_SIZEN(win_num));
> + mobiveil_csr_writel(pcie, upper_32_bits(size64),
> + PAB_EXT_PEX_AMAP_SIZEN(win_num));
>
> - csr_writel(pcie, lower_32_bits(cpu_addr),
> - PAB_PEX_AMAP_AXI_WIN(win_num));
> - csr_writel(pcie, upper_32_bits(cpu_addr),
> - PAB_EXT_PEX_AMAP_AXI_WIN(win_num));
> + mobiveil_csr_writel(pcie, lower_32_bits(cpu_addr),
> + PAB_PEX_AMAP_AXI_WIN(win_num));
> + mobiveil_csr_writel(pcie, upper_32_bits(cpu_addr),
> + PAB_EXT_PEX_AMAP_AXI_WIN(win_num));
>
> - csr_writel(pcie, lower_32_bits(pci_addr),
> - PAB_PEX_AMAP_PEX_WIN_L(win_num));
> - csr_writel(pcie, upper_32_bits(pci_addr),
> - PAB_PEX_AMAP_PEX_WIN_H(win_num));
> + mobiveil_csr_writel(pcie, lower_32_bits(pci_addr),
> + PAB_PEX_AMAP_PEX_WIN_L(win_num));
> + mobiveil_csr_writel(pcie, upper_32_bits(pci_addr),
> + PAB_PEX_AMAP_PEX_WIN_H(win_num));
>
> pcie->ib_wins_configured++;
> }
> @@ -515,27 +518,29 @@ static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num,
> * program Enable Bit to 1, Type Bit to (00) base 2, AXI Window Size Bit
> * to 4 KB in PAB_AXI_AMAP_CTRL register
> */
> - value = csr_readl(pcie, PAB_AXI_AMAP_CTRL(win_num));
> + value = mobiveil_csr_readl(pcie, PAB_AXI_AMAP_CTRL(win_num));
> value &= ~(WIN_TYPE_MASK << WIN_TYPE_SHIFT | WIN_SIZE_MASK);
> value |= 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT |
> (lower_32_bits(size64) & WIN_SIZE_MASK);
> - csr_writel(pcie, value, PAB_AXI_AMAP_CTRL(win_num));
> + mobiveil_csr_writel(pcie, value, PAB_AXI_AMAP_CTRL(win_num));
>
> - csr_writel(pcie, upper_32_bits(size64), PAB_EXT_AXI_AMAP_SIZE(win_num));
> + mobiveil_csr_writel(pcie, upper_32_bits(size64),
> + PAB_EXT_AXI_AMAP_SIZE(win_num));
>
> /*
> * program AXI window base with appropriate value in
> * PAB_AXI_AMAP_AXI_WIN0 register
> */
> - csr_writel(pcie, lower_32_bits(cpu_addr) & (~AXI_WINDOW_ALIGN_MASK),
> - PAB_AXI_AMAP_AXI_WIN(win_num));
> - csr_writel(pcie, upper_32_bits(cpu_addr),
> - PAB_EXT_AXI_AMAP_AXI_WIN(win_num));
> + mobiveil_csr_writel(pcie,
> + lower_32_bits(cpu_addr) & (~AXI_WINDOW_ALIGN_MASK),
> + PAB_AXI_AMAP_AXI_WIN(win_num));
> + mobiveil_csr_writel(pcie, upper_32_bits(cpu_addr),
> + PAB_EXT_AXI_AMAP_AXI_WIN(win_num));
>
> - csr_writel(pcie, lower_32_bits(pci_addr),
> - PAB_AXI_AMAP_PEX_WIN_L(win_num));
> - csr_writel(pcie, upper_32_bits(pci_addr),
> - PAB_AXI_AMAP_PEX_WIN_H(win_num));
> + mobiveil_csr_writel(pcie, lower_32_bits(pci_addr),
> + PAB_AXI_AMAP_PEX_WIN_L(win_num));
> + mobiveil_csr_writel(pcie, upper_32_bits(pci_addr),
> + PAB_AXI_AMAP_PEX_WIN_H(win_num));
>
> pcie->ob_wins_configured++;
> }
> @@ -579,42 +584,42 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
> struct resource_entry *win;
>
> /* setup bus numbers */
> - value = csr_readl(pcie, PCI_PRIMARY_BUS);
> + value = mobiveil_csr_readl(pcie, PCI_PRIMARY_BUS);
> value &= 0xff000000;
> value |= 0x00ff0100;
> - csr_writel(pcie, value, PCI_PRIMARY_BUS);
> + mobiveil_csr_writel(pcie, value, PCI_PRIMARY_BUS);
>
> /*
> * program Bus Master Enable Bit in Command Register in PAB Config
> * Space
> */
> - value = csr_readl(pcie, PCI_COMMAND);
> + value = mobiveil_csr_readl(pcie, PCI_COMMAND);
> value |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
> - csr_writel(pcie, value, PCI_COMMAND);
> + mobiveil_csr_writel(pcie, value, PCI_COMMAND);
>
> /*
> * program PIO Enable Bit to 1 (and PEX PIO Enable to 1) in PAB_CTRL
> * register
> */
> - pab_ctrl = csr_readl(pcie, PAB_CTRL);
> + pab_ctrl = mobiveil_csr_readl(pcie, PAB_CTRL);
> pab_ctrl |= (1 << AMBA_PIO_ENABLE_SHIFT) | (1 << PEX_PIO_ENABLE_SHIFT);
> - csr_writel(pcie, pab_ctrl, PAB_CTRL);
> + mobiveil_csr_writel(pcie, pab_ctrl, PAB_CTRL);
>
> - csr_writel(pcie, (PAB_INTP_INTX_MASK | PAB_INTP_MSI_MASK),
> - PAB_INTP_AMBA_MISC_ENB);
> + mobiveil_csr_writel(pcie, (PAB_INTP_INTX_MASK | PAB_INTP_MSI_MASK),
> + PAB_INTP_AMBA_MISC_ENB);
>
> /*
> * program PIO Enable Bit to 1 and Config Window Enable Bit to 1 in
> * PAB_AXI_PIO_CTRL Register
> */
> - value = csr_readl(pcie, PAB_AXI_PIO_CTRL);
> + value = mobiveil_csr_readl(pcie, PAB_AXI_PIO_CTRL);
> value |= APIO_EN_MASK;
> - csr_writel(pcie, value, PAB_AXI_PIO_CTRL);
> + mobiveil_csr_writel(pcie, value, PAB_AXI_PIO_CTRL);
>
> /* Enable PCIe PIO master */
> - value = csr_readl(pcie, PAB_PEX_PIO_CTRL);
> + value = mobiveil_csr_readl(pcie, PAB_PEX_PIO_CTRL);
> value |= 1 << PIO_ENABLE_SHIFT;
> - csr_writel(pcie, value, PAB_PEX_PIO_CTRL);
> + mobiveil_csr_writel(pcie, value, PAB_PEX_PIO_CTRL);
>
> /*
> * we'll program one outbound window for config reads and
> @@ -647,10 +652,10 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
> }
>
> /* fixup for PCIe class register */
> - value = csr_readl(pcie, PAB_INTP_AXI_PIO_CLASS);
> + value = mobiveil_csr_readl(pcie, PAB_INTP_AXI_PIO_CLASS);
> value &= 0xff;
> value |= (PCI_CLASS_BRIDGE_PCI << 16);
> - csr_writel(pcie, value, PAB_INTP_AXI_PIO_CLASS);
> + mobiveil_csr_writel(pcie, value, PAB_INTP_AXI_PIO_CLASS);
>
> /* setup MSI hardware registers */
> mobiveil_pcie_enable_msi(pcie);
> @@ -668,9 +673,9 @@ static void mobiveil_mask_intx_irq(struct irq_data *data)
> pcie = irq_desc_get_chip_data(desc);
> mask = 1 << ((data->hwirq + PAB_INTX_START) - 1);
> raw_spin_lock_irqsave(&pcie->intx_mask_lock, flags);
> - shifted_val = csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB);
> + shifted_val = mobiveil_csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB);
> shifted_val &= ~mask;
> - csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB);
> + mobiveil_csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB);
> raw_spin_unlock_irqrestore(&pcie->intx_mask_lock, flags);
> }
>
> @@ -684,9 +689,9 @@ static void mobiveil_unmask_intx_irq(struct irq_data *data)
> pcie = irq_desc_get_chip_data(desc);
> mask = 1 << ((data->hwirq + PAB_INTX_START) - 1);
> raw_spin_lock_irqsave(&pcie->intx_mask_lock, flags);
> - shifted_val = csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB);
> + shifted_val = mobiveil_csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB);
> shifted_val |= mask;
> - csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB);
> + mobiveil_csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB);
> raw_spin_unlock_irqrestore(&pcie->intx_mask_lock, flags);
> }
>
> --
> 2.20.1
>
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