| Message ID | 20181120092615.11680-3-Zhiqiang.Hou@nxp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
| Series | PCI: refactor Mobiveil driver and add PCIe Gen4 driver for NXP Layerscape SoCs | expand |
reviewed-by: Minghuan Lian <Minghuan.Lian@nxp.com> > -----Original Message----- > From: Z.q. Hou > Sent: Tuesday, November 20, 2018 5:26 PM > To: linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org; > devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; > bhelgaas@google.com; robh+dt@kernel.org; mark.rutland@arm.com; > l.subrahmanya@mobiveil.co.in; shawnguo@kernel.org; Leo Li > <leoyang.li@nxp.com>; lorenzo.pieralisi@arm.com; > catalin.marinas@arm.com; will.deacon@arm.com > Cc: Mingkai Hu <mingkai.hu@nxp.com>; M.h. Lian > <minghuan.lian@nxp.com>; Xiaowei Bao <xiaowei.bao@nxp.com>; Z.q. Hou > <zhiqiang.hou@nxp.com> > Subject: [PATCHv2 02/25] PCI: mobiveil: format the code without function > change > > From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com> > > Just format the code without functionality change. > > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com> > --- > V2: > - no change > > drivers/pci/controller/pcie-mobiveil.c | 261 +++++++++++++------------ > 1 file changed, 137 insertions(+), 124 deletions(-) > > diff --git a/drivers/pci/controller/pcie-mobiveil.c > b/drivers/pci/controller/pcie-mobiveil.c > index d55c7e780c6e..b87471f08a40 100644 > --- a/drivers/pci/controller/pcie-mobiveil.c > +++ b/drivers/pci/controller/pcie-mobiveil.c > @@ -31,38 +31,40 @@ > * translation tables are grouped into windows, each window registers are > * grouped into blocks of 4 or 16 registers each > */ > -#define PAB_REG_BLOCK_SIZE 16 > -#define PAB_EXT_REG_BLOCK_SIZE 4 > +#define PAB_REG_BLOCK_SIZE 16 > +#define PAB_EXT_REG_BLOCK_SIZE 4 > > -#define PAB_REG_ADDR(offset, win) (offset + (win * PAB_REG_BLOCK_SIZE)) > -#define PAB_EXT_REG_ADDR(offset, win) (offset + (win * > PAB_EXT_REG_BLOCK_SIZE)) > +#define PAB_REG_ADDR(offset, win) \ > + (offset + (win * PAB_REG_BLOCK_SIZE)) > +#define PAB_EXT_REG_ADDR(offset, win) \ > + (offset + (win * PAB_EXT_REG_BLOCK_SIZE)) > > -#define LTSSM_STATUS 0x0404 > -#define LTSSM_STATUS_L0_MASK 0x3f > -#define LTSSM_STATUS_L0 0x2d > +#define LTSSM_STATUS 0x0404 > +#define LTSSM_STATUS_L0_MASK 0x3f > +#define LTSSM_STATUS_L0 0x2d > > -#define PAB_CTRL 0x0808 > -#define AMBA_PIO_ENABLE_SHIFT 0 > -#define PEX_PIO_ENABLE_SHIFT 1 > -#define PAGE_SEL_SHIFT 13 > -#define PAGE_SEL_MASK 0x3f > -#define PAGE_LO_MASK 0x3ff > -#define PAGE_SEL_OFFSET_SHIFT 10 > +#define PAB_CTRL 0x0808 > +#define AMBA_PIO_ENABLE_SHIFT 0 > +#define PEX_PIO_ENABLE_SHIFT 1 > +#define PAGE_SEL_SHIFT 13 > +#define PAGE_SEL_MASK 0x3f > +#define PAGE_LO_MASK 0x3ff > +#define PAGE_SEL_OFFSET_SHIFT 10 > > -#define PAB_AXI_PIO_CTRL 0x0840 > -#define APIO_EN_MASK 0xf > +#define PAB_AXI_PIO_CTRL 0x0840 > +#define APIO_EN_MASK 0xf > > -#define PAB_PEX_PIO_CTRL 0x08c0 > -#define PIO_ENABLE_SHIFT 0 > +#define PAB_PEX_PIO_CTRL 0x08c0 > +#define PIO_ENABLE_SHIFT 0 > > #define PAB_INTP_AMBA_MISC_ENB 0x0b0c > -#define PAB_INTP_AMBA_MISC_STAT 0x0b1c > +#define PAB_INTP_AMBA_MISC_STAT 0x0b1c > #define PAB_INTP_INTX_MASK 0x01e0 > #define PAB_INTP_MSI_MASK 0x8 > > -#define PAB_AXI_AMAP_CTRL(win) PAB_REG_ADDR(0x0ba0, win) > -#define WIN_ENABLE_SHIFT 0 > -#define WIN_TYPE_SHIFT 1 > +#define PAB_AXI_AMAP_CTRL(win) PAB_REG_ADDR(0x0ba0, win) > +#define WIN_ENABLE_SHIFT 0 > +#define WIN_TYPE_SHIFT 1 > > #define PAB_EXT_AXI_AMAP_SIZE(win) PAB_EXT_REG_ADDR(0xbaf0, > win) > > @@ -70,16 +72,16 @@ > #define AXI_WINDOW_ALIGN_MASK 3 > > #define PAB_AXI_AMAP_PEX_WIN_L(win) PAB_REG_ADDR(0x0ba8, win) > -#define PAB_BUS_SHIFT 24 > -#define PAB_DEVICE_SHIFT 19 > -#define PAB_FUNCTION_SHIFT 16 > +#define PAB_BUS_SHIFT 24 > +#define PAB_DEVICE_SHIFT 19 > +#define PAB_FUNCTION_SHIFT 16 > > #define PAB_AXI_AMAP_PEX_WIN_H(win) PAB_REG_ADDR(0x0bac, win) > #define PAB_INTP_AXI_PIO_CLASS 0x474 > > -#define PAB_PEX_AMAP_CTRL(win) PAB_REG_ADDR(0x4ba0, win) > -#define AMAP_CTRL_EN_SHIFT 0 > -#define AMAP_CTRL_TYPE_SHIFT 1 > +#define PAB_PEX_AMAP_CTRL(win) PAB_REG_ADDR(0x4ba0, win) > +#define AMAP_CTRL_EN_SHIFT 0 > +#define AMAP_CTRL_TYPE_SHIFT 1 > > #define PAB_EXT_PEX_AMAP_SIZEN(win) PAB_EXT_REG_ADDR(0xbef0, > win) > #define PAB_PEX_AMAP_AXI_WIN(win) PAB_REG_ADDR(0x4ba4, win) > @@ -87,39 +89,39 @@ > #define PAB_PEX_AMAP_PEX_WIN_H(win) PAB_REG_ADDR(0x4bac, win) > > /* starting offset of INTX bits in status register */ > -#define PAB_INTX_START 5 > +#define PAB_INTX_START 5 > > /* supported number of MSI interrupts */ > -#define PCI_NUM_MSI 16 > +#define PCI_NUM_MSI 16 > > /* MSI registers */ > -#define MSI_BASE_LO_OFFSET 0x04 > -#define MSI_BASE_HI_OFFSET 0x08 > -#define MSI_SIZE_OFFSET 0x0c > -#define MSI_ENABLE_OFFSET 0x14 > -#define MSI_STATUS_OFFSET 0x18 > -#define MSI_DATA_OFFSET 0x20 > -#define MSI_ADDR_L_OFFSET 0x24 > -#define MSI_ADDR_H_OFFSET 0x28 > +#define MSI_BASE_LO_OFFSET 0x04 > +#define MSI_BASE_HI_OFFSET 0x08 > +#define MSI_SIZE_OFFSET 0x0c > +#define MSI_ENABLE_OFFSET 0x14 > +#define MSI_STATUS_OFFSET 0x18 > +#define MSI_DATA_OFFSET 0x20 > +#define MSI_ADDR_L_OFFSET 0x24 > +#define MSI_ADDR_H_OFFSET 0x28 > > /* outbound and inbound window definitions */ > -#define WIN_NUM_0 0 > -#define WIN_NUM_1 1 > -#define CFG_WINDOW_TYPE 0 > -#define IO_WINDOW_TYPE 1 > -#define MEM_WINDOW_TYPE 2 > -#define IB_WIN_SIZE ((u64)256 * 1024 * 1024 * 1024) > -#define MAX_PIO_WINDOWS 8 > +#define WIN_NUM_0 0 > +#define WIN_NUM_1 1 > +#define CFG_WINDOW_TYPE 0 > +#define IO_WINDOW_TYPE 1 > +#define MEM_WINDOW_TYPE 2 > +#define IB_WIN_SIZE ((u64)256 * 1024 * 1024 * 1024) > +#define MAX_PIO_WINDOWS 8 > > /* Parameters for the waiting for link up routine */ > -#define LINK_WAIT_MAX_RETRIES 10 > -#define LINK_WAIT_MIN 90000 > -#define LINK_WAIT_MAX 100000 > +#define LINK_WAIT_MAX_RETRIES 10 > +#define LINK_WAIT_MIN 90000 > +#define LINK_WAIT_MAX 100000 > > -#define PAGED_ADDR_BNDRY 0xc00 > -#define OFFSET_TO_PAGE_ADDR(off) \ > +#define PAGED_ADDR_BNDRY 0xc00 > +#define OFFSET_TO_PAGE_ADDR(off) \ > ((off & PAGE_LO_MASK) | PAGED_ADDR_BNDRY) > -#define OFFSET_TO_PAGE_IDX(off) \ > +#define OFFSET_TO_PAGE_IDX(off) \ > ((off >> PAGE_SEL_OFFSET_SHIFT) & PAGE_SEL_MASK) > > struct mobiveil_msi { /* MSI information */ > @@ -297,14 +299,14 @@ static void __iomem > *mobiveil_pcie_map_bus(struct pci_bus *bus, > unsigned int devfn, int where) > { > struct mobiveil_pcie *pcie = bus->sysdata; > + u32 value; > > if (!mobiveil_pcie_valid_device(bus, devfn)) > return NULL; > > - if (bus->number == pcie->root_bus_nr) { > - /* RC config access */ > + /* RC config access */ > + if (bus->number == pcie->root_bus_nr) > return pcie->csr_axi_slave_base + where; > - } > > /* > * EP config access (in Config/APIO space) @@ -312,10 +314,12 @@ > static void __iomem *mobiveil_pcie_map_bus(struct pci_bus *bus, > * (BDF) in PAB_AXI_AMAP_PEX_WIN_L0 Register. > * Relies on pci_lock serialization > */ > - csr_writel(pcie, bus->number << PAB_BUS_SHIFT | > - PCI_SLOT(devfn) << PAB_DEVICE_SHIFT | > - PCI_FUNC(devfn) << PAB_FUNCTION_SHIFT, > - PAB_AXI_AMAP_PEX_WIN_L(WIN_NUM_0)); > + value = bus->number << PAB_BUS_SHIFT | > + 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)); > + > return pcie->config_axi_slave_base + where; } > > @@ -350,22 +354,22 @@ static void mobiveil_pcie_isr(struct irq_desc *desc) > > /* Handle INTx */ > if (intr_status & PAB_INTP_INTX_MASK) { > - shifted_status = csr_readl(pcie, > PAB_INTP_AMBA_MISC_STAT) >> > - PAB_INTX_START; > + shifted_status = csr_readl(pcie, > PAB_INTP_AMBA_MISC_STAT); > + shifted_status >>= PAB_INTX_START; > do { > for_each_set_bit(bit, &shifted_status, > PCI_NUM_INTX) { > virq = irq_find_mapping(pcie->intx_domain, > - bit + 1); > + bit + 1); > if (virq) > generic_handle_irq(virq); > else > - dev_err_ratelimited(dev, > - "unexpected IRQ, INT%d\n", > bit); > + dev_err_ratelimited(dev, > "unexpected IRQ, INT%d\n", > + bit); > > /* clear interrupt */ > csr_writel(pcie, > - shifted_status << PAB_INTX_START, > - PAB_INTP_AMBA_MISC_STAT); > + shifted_status << PAB_INTX_START, > + PAB_INTP_AMBA_MISC_STAT); > } > } while ((shifted_status >> PAB_INTX_START) != 0); > } > @@ -375,8 +379,7 @@ static void mobiveil_pcie_isr(struct irq_desc *desc) > > /* handle MSI interrupts */ > while (msi_status & 1) { > - msi_data = readl_relaxed(pcie->apb_csr_base > - + MSI_DATA_OFFSET); > + msi_data = readl_relaxed(pcie->apb_csr_base + > MSI_DATA_OFFSET); > > /* > * MSI_STATUS_OFFSET register gets updated to zero @@ - > 385,18 +388,18 @@ static void mobiveil_pcie_isr(struct irq_desc *desc) > * two dummy reads. > */ > msi_addr_lo = readl_relaxed(pcie->apb_csr_base + > - MSI_ADDR_L_OFFSET); > + MSI_ADDR_L_OFFSET); > msi_addr_hi = readl_relaxed(pcie->apb_csr_base + > - MSI_ADDR_H_OFFSET); > + MSI_ADDR_H_OFFSET); > dev_dbg(dev, "MSI registers, data: %08x, > addr: %08x:%08x\n", > - msi_data, msi_addr_hi, msi_addr_lo); > + msi_data, msi_addr_hi, msi_addr_lo); > > virq = irq_find_mapping(msi->dev_domain, msi_data); > if (virq) > generic_handle_irq(virq); > > msi_status = readl_relaxed(pcie->apb_csr_base + > - MSI_STATUS_OFFSET); > + MSI_STATUS_OFFSET); > } > > /* Clear the interrupt status */ > @@ -413,7 +416,7 @@ static int mobiveil_pcie_parse_dt(struct > mobiveil_pcie *pcie) > > /* map config resource */ > res = platform_get_resource_byname(pdev, IORESOURCE_MEM, > - "config_axi_slave"); > + "config_axi_slave"); > pcie->config_axi_slave_base = devm_pci_remap_cfg_resource(dev, > res); > if (IS_ERR(pcie->config_axi_slave_base)) > return PTR_ERR(pcie->config_axi_slave_base); > @@ -421,7 +424,7 @@ static int mobiveil_pcie_parse_dt(struct > mobiveil_pcie *pcie) > > /* map csr resource */ > res = platform_get_resource_byname(pdev, IORESOURCE_MEM, > - "csr_axi_slave"); > + "csr_axi_slave"); > pcie->csr_axi_slave_base = devm_pci_remap_cfg_resource(dev, res); > if (IS_ERR(pcie->csr_axi_slave_base)) > return PTR_ERR(pcie->csr_axi_slave_base); > @@ -452,7 +455,7 @@ static int mobiveil_pcie_parse_dt(struct > mobiveil_pcie *pcie) } > > static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num, > - int pci_addr, u32 type, u64 size) > + int pci_addr, u32 type, u64 size) > { > int pio_ctrl_val; > int amap_ctrl_dw; > @@ -465,19 +468,20 @@ static void program_ib_windows(struct > mobiveil_pcie *pcie, int win_num, > } > > pio_ctrl_val = csr_readl(pcie, PAB_PEX_PIO_CTRL); > - csr_writel(pcie, > - pio_ctrl_val | (1 << PIO_ENABLE_SHIFT), PAB_PEX_PIO_CTRL); > - amap_ctrl_dw = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num)); > - amap_ctrl_dw = (amap_ctrl_dw | (type << AMAP_CTRL_TYPE_SHIFT)); > - amap_ctrl_dw = (amap_ctrl_dw | (1 << AMAP_CTRL_EN_SHIFT)); > + pio_ctrl_val |= 1 << PIO_ENABLE_SHIFT; > + csr_writel(pcie, pio_ctrl_val, PAB_PEX_PIO_CTRL); > > - csr_writel(pcie, amap_ctrl_dw | lower_32_bits(size64), > - PAB_PEX_AMAP_CTRL(win_num)); > + amap_ctrl_dw = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num)); > + amap_ctrl_dw |= (type << AMAP_CTRL_TYPE_SHIFT) | > + (1 << AMAP_CTRL_EN_SHIFT) | > + lower_32_bits(size64); > + csr_writel(pcie, amap_ctrl_dw, PAB_PEX_AMAP_CTRL(win_num)); > > csr_writel(pcie, upper_32_bits(size64), > PAB_EXT_PEX_AMAP_SIZEN(win_num)); > > csr_writel(pcie, pci_addr, PAB_PEX_AMAP_AXI_WIN(win_num)); > + > csr_writel(pcie, pci_addr, PAB_PEX_AMAP_PEX_WIN_L(win_num)); > csr_writel(pcie, 0, PAB_PEX_AMAP_PEX_WIN_H(win_num)); } @@ - > 486,7 +490,8 @@ static void program_ib_windows(struct mobiveil_pcie > *pcie, int win_num, > * routine to program the outbound windows > */ > static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, > - u64 cpu_addr, u64 pci_addr, u32 config_io_bit, u64 size) > + u64 cpu_addr, u64 pci_addr, > + u32 config_io_bit, u64 size) > { > > u32 value, type; > @@ -505,7 +510,7 @@ static void program_ob_windows(struct > mobiveil_pcie *pcie, int win_num, > type = config_io_bit; > value = csr_readl(pcie, PAB_AXI_AMAP_CTRL(win_num)); > csr_writel(pcie, 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT > | > - lower_32_bits(size64), > PAB_AXI_AMAP_CTRL(win_num)); > + lower_32_bits(size64), PAB_AXI_AMAP_CTRL(win_num)); > > csr_writel(pcie, upper_32_bits(size64), > PAB_EXT_AXI_AMAP_SIZE(win_num)); > > @@ -515,14 +520,14 @@ static void program_ob_windows(struct > mobiveil_pcie *pcie, int win_num, > */ > value = csr_readl(pcie, PAB_AXI_AMAP_AXI_WIN(win_num)); > csr_writel(pcie, cpu_addr & (~AXI_WINDOW_ALIGN_MASK), > - PAB_AXI_AMAP_AXI_WIN(win_num)); > + PAB_AXI_AMAP_AXI_WIN(win_num)); > > value = csr_readl(pcie, PAB_AXI_AMAP_PEX_WIN_H(win_num)); > > csr_writel(pcie, lower_32_bits(pci_addr), > - PAB_AXI_AMAP_PEX_WIN_L(win_num)); > + PAB_AXI_AMAP_PEX_WIN_L(win_num)); > csr_writel(pcie, upper_32_bits(pci_addr), > - PAB_AXI_AMAP_PEX_WIN_H(win_num)); > + PAB_AXI_AMAP_PEX_WIN_H(win_num)); > > pcie->ob_wins_configured++; > } > @@ -538,7 +543,9 @@ static int mobiveil_bringup_link(struct mobiveil_pcie > *pcie) > > usleep_range(LINK_WAIT_MIN, LINK_WAIT_MAX); > } > + > dev_err(&pcie->pdev->dev, "link never came up\n"); > + > return -ETIMEDOUT; > } > > @@ -551,16 +558,16 @@ static void mobiveil_pcie_enable_msi(struct > mobiveil_pcie *pcie) > msi->msi_pages_phys = (phys_addr_t)msg_addr; > > writel_relaxed(lower_32_bits(msg_addr), > - pcie->apb_csr_base + MSI_BASE_LO_OFFSET); > + pcie->apb_csr_base + MSI_BASE_LO_OFFSET); > writel_relaxed(upper_32_bits(msg_addr), > - pcie->apb_csr_base + MSI_BASE_HI_OFFSET); > + pcie->apb_csr_base + MSI_BASE_HI_OFFSET); > writel_relaxed(4096, pcie->apb_csr_base + MSI_SIZE_OFFSET); > writel_relaxed(1, pcie->apb_csr_base + MSI_ENABLE_OFFSET); } > > static int mobiveil_host_init(struct mobiveil_pcie *pcie) { > - u32 value, pab_ctrl, type = 0; > + u32 value, pab_ctrl, type; > int err; > struct resource_entry *win, *tmp; > > @@ -575,26 +582,27 @@ static int mobiveil_host_init(struct mobiveil_pcie > *pcie) > * Space > */ > value = csr_readl(pcie, PCI_COMMAND); > - csr_writel(pcie, value | PCI_COMMAND_IO | > PCI_COMMAND_MEMORY | > - PCI_COMMAND_MASTER, PCI_COMMAND); > + value |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | > PCI_COMMAND_MASTER; > + 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); > - csr_writel(pcie, pab_ctrl | (1 << AMBA_PIO_ENABLE_SHIFT) | > - (1 << PEX_PIO_ENABLE_SHIFT), PAB_CTRL); > + pab_ctrl |= (1 << AMBA_PIO_ENABLE_SHIFT) | (1 << > PEX_PIO_ENABLE_SHIFT); > + csr_writel(pcie, pab_ctrl, PAB_CTRL); > > csr_writel(pcie, (PAB_INTP_INTX_MASK | PAB_INTP_MSI_MASK), > - PAB_INTP_AMBA_MISC_ENB); > + 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); > - csr_writel(pcie, value | APIO_EN_MASK, PAB_AXI_PIO_CTRL); > + value |= APIO_EN_MASK; > + csr_writel(pcie, value, PAB_AXI_PIO_CTRL); > > /* > * we'll program one outbound window for config reads and @@ - > 605,25 +613,25 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie) > > /* config outbound translation window */ > program_ob_windows(pcie, pcie->ob_wins_configured, > - pcie->ob_io_res->start, 0, CFG_WINDOW_TYPE, > - resource_size(pcie->ob_io_res)); > + pcie->ob_io_res->start, 0, CFG_WINDOW_TYPE, > + resource_size(pcie->ob_io_res)); > > /* memory inbound translation window */ > program_ib_windows(pcie, WIN_NUM_1, 0, MEM_WINDOW_TYPE, > IB_WIN_SIZE); > > /* Get the I/O and memory ranges from DT */ > resource_list_for_each_entry_safe(win, tmp, &pcie->resources) { > - type = 0; > if (resource_type(win->res) == IORESOURCE_MEM) > type = MEM_WINDOW_TYPE; > - if (resource_type(win->res) == IORESOURCE_IO) > + else if (resource_type(win->res) == IORESOURCE_IO) > type = IO_WINDOW_TYPE; > - if (type) { > - /* configure outbound translation window */ > - program_ob_windows(pcie, pcie- > >ob_wins_configured, > - win->res->start, 0, type, > - resource_size(win->res)); > - } > + else > + continue; > + > + /* configure outbound translation window */ > + program_ob_windows(pcie, pcie->ob_wins_configured, > + win->res->start, 0, type, > + resource_size(win->res)); > } > > /* setup MSI hardware registers */ > @@ -643,7 +651,8 @@ static void mobiveil_mask_intx_irq(struct irq_data > *data) > 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); > - csr_writel(pcie, (shifted_val & (~mask)), > PAB_INTP_AMBA_MISC_ENB); > + shifted_val &= ~mask; > + csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB); > raw_spin_unlock_irqrestore(&pcie->intx_mask_lock, flags); } > > @@ -658,7 +667,8 @@ static void mobiveil_unmask_intx_irq(struct irq_data > *data) > 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); > - csr_writel(pcie, (shifted_val | mask), PAB_INTP_AMBA_MISC_ENB); > + shifted_val |= mask; > + csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB); > raw_spin_unlock_irqrestore(&pcie->intx_mask_lock, flags); } > > @@ -672,10 +682,11 @@ static struct irq_chip intx_irq_chip = { > > /* routine to setup the INTx related data */ static int > mobiveil_pcie_intx_map(struct irq_domain *domain, unsigned int irq, > - irq_hw_number_t hwirq) > + irq_hw_number_t hwirq) > { > irq_set_chip_and_handler(irq, &intx_irq_chip, handle_level_irq); > irq_set_chip_data(irq, domain->host_data); > + > return 0; > } > > @@ -692,7 +703,7 @@ static struct irq_chip mobiveil_msi_irq_chip = { > > static struct msi_domain_info mobiveil_msi_domain_info = { > .flags = (MSI_FLAG_USE_DEF_DOM_OPS | > MSI_FLAG_USE_DEF_CHIP_OPS | > - MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX), > + MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX), > .chip = &mobiveil_msi_irq_chip, > }; > > @@ -710,7 +721,7 @@ static void mobiveil_compose_msi_msg(struct > irq_data *data, struct msi_msg *msg) } > > static int mobiveil_msi_set_affinity(struct irq_data *irq_data, > - const struct cpumask *mask, bool force) > + const struct cpumask *mask, bool force) > { > return -EINVAL; > } > @@ -722,7 +733,8 @@ static struct irq_chip mobiveil_msi_bottom_irq_chip > = { }; > > static int mobiveil_irq_msi_domain_alloc(struct irq_domain *domain, > - unsigned int virq, unsigned int nr_irqs, void *args) > + unsigned int virq, > + unsigned int nr_irqs, void *args) > { > struct mobiveil_pcie *pcie = domain->host_data; > struct mobiveil_msi *msi = &pcie->msi; @@ -742,13 +754,13 @@ > static int mobiveil_irq_msi_domain_alloc(struct irq_domain *domain, > mutex_unlock(&msi->lock); > > irq_domain_set_info(domain, virq, bit, > &mobiveil_msi_bottom_irq_chip, > - domain->host_data, handle_level_irq, > - NULL, NULL); > + domain->host_data, handle_level_irq, NULL, NULL); > return 0; > } > > static void mobiveil_irq_msi_domain_free(struct irq_domain *domain, > - unsigned int virq, unsigned int nr_irqs) > + unsigned int virq, > + unsigned int nr_irqs) > { > struct irq_data *d = irq_domain_get_irq_data(domain, virq); > struct mobiveil_pcie *pcie = irq_data_get_irq_chip_data(d); @@ - > 756,12 +768,11 @@ static void mobiveil_irq_msi_domain_free(struct > irq_domain *domain, > > mutex_lock(&msi->lock); > > - if (!test_bit(d->hwirq, msi->msi_irq_in_use)) { > + if (!test_bit(d->hwirq, msi->msi_irq_in_use)) > dev_err(&pcie->pdev->dev, "trying to free unused > MSI#%lu\n", > d->hwirq); > - } else { > + else > __clear_bit(d->hwirq, msi->msi_irq_in_use); > - } > > mutex_unlock(&msi->lock); > } > @@ -785,12 +796,14 @@ static int mobiveil_allocate_msi_domains(struct > mobiveil_pcie *pcie) > } > > msi->msi_domain = pci_msi_create_irq_domain(fwnode, > - &mobiveil_msi_domain_info, msi- > >dev_domain); > + > &mobiveil_msi_domain_info, > + msi->dev_domain); > if (!msi->msi_domain) { > dev_err(dev, "failed to create MSI domain\n"); > irq_domain_remove(msi->dev_domain); > return -ENOMEM; > } > + > return 0; > } > > @@ -801,8 +814,8 @@ static int mobiveil_pcie_init_irq_domain(struct > mobiveil_pcie *pcie) > int ret; > > /* setup INTx */ > - pcie->intx_domain = irq_domain_add_linear(node, > - PCI_NUM_INTX, &intx_domain_ops, pcie); > + pcie->intx_domain = irq_domain_add_linear(node, PCI_NUM_INTX, > + &intx_domain_ops, pcie); > > if (!pcie->intx_domain) { > dev_err(dev, "Failed to get a INTx IRQ domain\n"); @@ - > 917,10 +930,10 @@ MODULE_DEVICE_TABLE(of, mobiveil_pcie_of_match); > static struct platform_driver mobiveil_pcie_driver = { > .probe = mobiveil_pcie_probe, > .driver = { > - .name = "mobiveil-pcie", > - .of_match_table = mobiveil_pcie_of_match, > - .suppress_bind_attrs = true, > - }, > + .name = "mobiveil-pcie", > + .of_match_table = mobiveil_pcie_of_match, > + .suppress_bind_attrs = true, > + }, > }; > > builtin_platform_driver(mobiveil_pcie_driver); > -- > 2.17.1
diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c index d55c7e780c6e..b87471f08a40 100644 --- a/drivers/pci/controller/pcie-mobiveil.c +++ b/drivers/pci/controller/pcie-mobiveil.c @@ -31,38 +31,40 @@ * translation tables are grouped into windows, each window registers are * grouped into blocks of 4 or 16 registers each */ -#define PAB_REG_BLOCK_SIZE 16 -#define PAB_EXT_REG_BLOCK_SIZE 4 +#define PAB_REG_BLOCK_SIZE 16 +#define PAB_EXT_REG_BLOCK_SIZE 4 -#define PAB_REG_ADDR(offset, win) (offset + (win * PAB_REG_BLOCK_SIZE)) -#define PAB_EXT_REG_ADDR(offset, win) (offset + (win * PAB_EXT_REG_BLOCK_SIZE)) +#define PAB_REG_ADDR(offset, win) \ + (offset + (win * PAB_REG_BLOCK_SIZE)) +#define PAB_EXT_REG_ADDR(offset, win) \ + (offset + (win * PAB_EXT_REG_BLOCK_SIZE)) -#define LTSSM_STATUS 0x0404 -#define LTSSM_STATUS_L0_MASK 0x3f -#define LTSSM_STATUS_L0 0x2d +#define LTSSM_STATUS 0x0404 +#define LTSSM_STATUS_L0_MASK 0x3f +#define LTSSM_STATUS_L0 0x2d -#define PAB_CTRL 0x0808 -#define AMBA_PIO_ENABLE_SHIFT 0 -#define PEX_PIO_ENABLE_SHIFT 1 -#define PAGE_SEL_SHIFT 13 -#define PAGE_SEL_MASK 0x3f -#define PAGE_LO_MASK 0x3ff -#define PAGE_SEL_OFFSET_SHIFT 10 +#define PAB_CTRL 0x0808 +#define AMBA_PIO_ENABLE_SHIFT 0 +#define PEX_PIO_ENABLE_SHIFT 1 +#define PAGE_SEL_SHIFT 13 +#define PAGE_SEL_MASK 0x3f +#define PAGE_LO_MASK 0x3ff +#define PAGE_SEL_OFFSET_SHIFT 10 -#define PAB_AXI_PIO_CTRL 0x0840 -#define APIO_EN_MASK 0xf +#define PAB_AXI_PIO_CTRL 0x0840 +#define APIO_EN_MASK 0xf -#define PAB_PEX_PIO_CTRL 0x08c0 -#define PIO_ENABLE_SHIFT 0 +#define PAB_PEX_PIO_CTRL 0x08c0 +#define PIO_ENABLE_SHIFT 0 #define PAB_INTP_AMBA_MISC_ENB 0x0b0c -#define PAB_INTP_AMBA_MISC_STAT 0x0b1c +#define PAB_INTP_AMBA_MISC_STAT 0x0b1c #define PAB_INTP_INTX_MASK 0x01e0 #define PAB_INTP_MSI_MASK 0x8 -#define PAB_AXI_AMAP_CTRL(win) PAB_REG_ADDR(0x0ba0, win) -#define WIN_ENABLE_SHIFT 0 -#define WIN_TYPE_SHIFT 1 +#define PAB_AXI_AMAP_CTRL(win) PAB_REG_ADDR(0x0ba0, win) +#define WIN_ENABLE_SHIFT 0 +#define WIN_TYPE_SHIFT 1 #define PAB_EXT_AXI_AMAP_SIZE(win) PAB_EXT_REG_ADDR(0xbaf0, win) @@ -70,16 +72,16 @@ #define AXI_WINDOW_ALIGN_MASK 3 #define PAB_AXI_AMAP_PEX_WIN_L(win) PAB_REG_ADDR(0x0ba8, win) -#define PAB_BUS_SHIFT 24 -#define PAB_DEVICE_SHIFT 19 -#define PAB_FUNCTION_SHIFT 16 +#define PAB_BUS_SHIFT 24 +#define PAB_DEVICE_SHIFT 19 +#define PAB_FUNCTION_SHIFT 16 #define PAB_AXI_AMAP_PEX_WIN_H(win) PAB_REG_ADDR(0x0bac, win) #define PAB_INTP_AXI_PIO_CLASS 0x474 -#define PAB_PEX_AMAP_CTRL(win) PAB_REG_ADDR(0x4ba0, win) -#define AMAP_CTRL_EN_SHIFT 0 -#define AMAP_CTRL_TYPE_SHIFT 1 +#define PAB_PEX_AMAP_CTRL(win) PAB_REG_ADDR(0x4ba0, win) +#define AMAP_CTRL_EN_SHIFT 0 +#define AMAP_CTRL_TYPE_SHIFT 1 #define PAB_EXT_PEX_AMAP_SIZEN(win) PAB_EXT_REG_ADDR(0xbef0, win) #define PAB_PEX_AMAP_AXI_WIN(win) PAB_REG_ADDR(0x4ba4, win) @@ -87,39 +89,39 @@ #define PAB_PEX_AMAP_PEX_WIN_H(win) PAB_REG_ADDR(0x4bac, win) /* starting offset of INTX bits in status register */ -#define PAB_INTX_START 5 +#define PAB_INTX_START 5 /* supported number of MSI interrupts */ -#define PCI_NUM_MSI 16 +#define PCI_NUM_MSI 16 /* MSI registers */ -#define MSI_BASE_LO_OFFSET 0x04 -#define MSI_BASE_HI_OFFSET 0x08 -#define MSI_SIZE_OFFSET 0x0c -#define MSI_ENABLE_OFFSET 0x14 -#define MSI_STATUS_OFFSET 0x18 -#define MSI_DATA_OFFSET 0x20 -#define MSI_ADDR_L_OFFSET 0x24 -#define MSI_ADDR_H_OFFSET 0x28 +#define MSI_BASE_LO_OFFSET 0x04 +#define MSI_BASE_HI_OFFSET 0x08 +#define MSI_SIZE_OFFSET 0x0c +#define MSI_ENABLE_OFFSET 0x14 +#define MSI_STATUS_OFFSET 0x18 +#define MSI_DATA_OFFSET 0x20 +#define MSI_ADDR_L_OFFSET 0x24 +#define MSI_ADDR_H_OFFSET 0x28 /* outbound and inbound window definitions */ -#define WIN_NUM_0 0 -#define WIN_NUM_1 1 -#define CFG_WINDOW_TYPE 0 -#define IO_WINDOW_TYPE 1 -#define MEM_WINDOW_TYPE 2 -#define IB_WIN_SIZE ((u64)256 * 1024 * 1024 * 1024) -#define MAX_PIO_WINDOWS 8 +#define WIN_NUM_0 0 +#define WIN_NUM_1 1 +#define CFG_WINDOW_TYPE 0 +#define IO_WINDOW_TYPE 1 +#define MEM_WINDOW_TYPE 2 +#define IB_WIN_SIZE ((u64)256 * 1024 * 1024 * 1024) +#define MAX_PIO_WINDOWS 8 /* Parameters for the waiting for link up routine */ -#define LINK_WAIT_MAX_RETRIES 10 -#define LINK_WAIT_MIN 90000 -#define LINK_WAIT_MAX 100000 +#define LINK_WAIT_MAX_RETRIES 10 +#define LINK_WAIT_MIN 90000 +#define LINK_WAIT_MAX 100000 -#define PAGED_ADDR_BNDRY 0xc00 -#define OFFSET_TO_PAGE_ADDR(off) \ +#define PAGED_ADDR_BNDRY 0xc00 +#define OFFSET_TO_PAGE_ADDR(off) \ ((off & PAGE_LO_MASK) | PAGED_ADDR_BNDRY) -#define OFFSET_TO_PAGE_IDX(off) \ +#define OFFSET_TO_PAGE_IDX(off) \ ((off >> PAGE_SEL_OFFSET_SHIFT) & PAGE_SEL_MASK) struct mobiveil_msi { /* MSI information */ @@ -297,14 +299,14 @@ static void __iomem *mobiveil_pcie_map_bus(struct pci_bus *bus, unsigned int devfn, int where) { struct mobiveil_pcie *pcie = bus->sysdata; + u32 value; if (!mobiveil_pcie_valid_device(bus, devfn)) return NULL; - if (bus->number == pcie->root_bus_nr) { - /* RC config access */ + /* RC config access */ + if (bus->number == pcie->root_bus_nr) return pcie->csr_axi_slave_base + where; - } /* * EP config access (in Config/APIO space) @@ -312,10 +314,12 @@ static void __iomem *mobiveil_pcie_map_bus(struct pci_bus *bus, * (BDF) in PAB_AXI_AMAP_PEX_WIN_L0 Register. * Relies on pci_lock serialization */ - csr_writel(pcie, bus->number << PAB_BUS_SHIFT | - PCI_SLOT(devfn) << PAB_DEVICE_SHIFT | - PCI_FUNC(devfn) << PAB_FUNCTION_SHIFT, - PAB_AXI_AMAP_PEX_WIN_L(WIN_NUM_0)); + value = bus->number << PAB_BUS_SHIFT | + 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)); + return pcie->config_axi_slave_base + where; } @@ -350,22 +354,22 @@ static void mobiveil_pcie_isr(struct irq_desc *desc) /* Handle INTx */ if (intr_status & PAB_INTP_INTX_MASK) { - shifted_status = csr_readl(pcie, PAB_INTP_AMBA_MISC_STAT) >> - PAB_INTX_START; + shifted_status = csr_readl(pcie, PAB_INTP_AMBA_MISC_STAT); + shifted_status >>= PAB_INTX_START; do { for_each_set_bit(bit, &shifted_status, PCI_NUM_INTX) { virq = irq_find_mapping(pcie->intx_domain, - bit + 1); + bit + 1); if (virq) generic_handle_irq(virq); else - dev_err_ratelimited(dev, - "unexpected IRQ, INT%d\n", bit); + dev_err_ratelimited(dev, "unexpected IRQ, INT%d\n", + bit); /* clear interrupt */ csr_writel(pcie, - shifted_status << PAB_INTX_START, - PAB_INTP_AMBA_MISC_STAT); + shifted_status << PAB_INTX_START, + PAB_INTP_AMBA_MISC_STAT); } } while ((shifted_status >> PAB_INTX_START) != 0); } @@ -375,8 +379,7 @@ static void mobiveil_pcie_isr(struct irq_desc *desc) /* handle MSI interrupts */ while (msi_status & 1) { - msi_data = readl_relaxed(pcie->apb_csr_base - + MSI_DATA_OFFSET); + msi_data = readl_relaxed(pcie->apb_csr_base + MSI_DATA_OFFSET); /* * MSI_STATUS_OFFSET register gets updated to zero @@ -385,18 +388,18 @@ static void mobiveil_pcie_isr(struct irq_desc *desc) * two dummy reads. */ msi_addr_lo = readl_relaxed(pcie->apb_csr_base + - MSI_ADDR_L_OFFSET); + MSI_ADDR_L_OFFSET); msi_addr_hi = readl_relaxed(pcie->apb_csr_base + - MSI_ADDR_H_OFFSET); + MSI_ADDR_H_OFFSET); dev_dbg(dev, "MSI registers, data: %08x, addr: %08x:%08x\n", - msi_data, msi_addr_hi, msi_addr_lo); + msi_data, msi_addr_hi, msi_addr_lo); virq = irq_find_mapping(msi->dev_domain, msi_data); if (virq) generic_handle_irq(virq); msi_status = readl_relaxed(pcie->apb_csr_base + - MSI_STATUS_OFFSET); + MSI_STATUS_OFFSET); } /* Clear the interrupt status */ @@ -413,7 +416,7 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie) /* map config resource */ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, - "config_axi_slave"); + "config_axi_slave"); pcie->config_axi_slave_base = devm_pci_remap_cfg_resource(dev, res); if (IS_ERR(pcie->config_axi_slave_base)) return PTR_ERR(pcie->config_axi_slave_base); @@ -421,7 +424,7 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie) /* map csr resource */ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, - "csr_axi_slave"); + "csr_axi_slave"); pcie->csr_axi_slave_base = devm_pci_remap_cfg_resource(dev, res); if (IS_ERR(pcie->csr_axi_slave_base)) return PTR_ERR(pcie->csr_axi_slave_base); @@ -452,7 +455,7 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie) } static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num, - int pci_addr, u32 type, u64 size) + int pci_addr, u32 type, u64 size) { int pio_ctrl_val; int amap_ctrl_dw; @@ -465,19 +468,20 @@ static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num, } pio_ctrl_val = csr_readl(pcie, PAB_PEX_PIO_CTRL); - csr_writel(pcie, - pio_ctrl_val | (1 << PIO_ENABLE_SHIFT), PAB_PEX_PIO_CTRL); - amap_ctrl_dw = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num)); - amap_ctrl_dw = (amap_ctrl_dw | (type << AMAP_CTRL_TYPE_SHIFT)); - amap_ctrl_dw = (amap_ctrl_dw | (1 << AMAP_CTRL_EN_SHIFT)); + pio_ctrl_val |= 1 << PIO_ENABLE_SHIFT; + csr_writel(pcie, pio_ctrl_val, PAB_PEX_PIO_CTRL); - csr_writel(pcie, amap_ctrl_dw | lower_32_bits(size64), - PAB_PEX_AMAP_CTRL(win_num)); + amap_ctrl_dw = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num)); + amap_ctrl_dw |= (type << AMAP_CTRL_TYPE_SHIFT) | + (1 << AMAP_CTRL_EN_SHIFT) | + lower_32_bits(size64); + csr_writel(pcie, amap_ctrl_dw, PAB_PEX_AMAP_CTRL(win_num)); csr_writel(pcie, upper_32_bits(size64), PAB_EXT_PEX_AMAP_SIZEN(win_num)); csr_writel(pcie, pci_addr, PAB_PEX_AMAP_AXI_WIN(win_num)); + csr_writel(pcie, pci_addr, PAB_PEX_AMAP_PEX_WIN_L(win_num)); csr_writel(pcie, 0, PAB_PEX_AMAP_PEX_WIN_H(win_num)); } @@ -486,7 +490,8 @@ static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num, * routine to program the outbound windows */ static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, - u64 cpu_addr, u64 pci_addr, u32 config_io_bit, u64 size) + u64 cpu_addr, u64 pci_addr, + u32 config_io_bit, u64 size) { u32 value, type; @@ -505,7 +510,7 @@ static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, type = config_io_bit; value = csr_readl(pcie, PAB_AXI_AMAP_CTRL(win_num)); csr_writel(pcie, 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT | - lower_32_bits(size64), PAB_AXI_AMAP_CTRL(win_num)); + lower_32_bits(size64), PAB_AXI_AMAP_CTRL(win_num)); csr_writel(pcie, upper_32_bits(size64), PAB_EXT_AXI_AMAP_SIZE(win_num)); @@ -515,14 +520,14 @@ static void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, */ value = csr_readl(pcie, PAB_AXI_AMAP_AXI_WIN(win_num)); csr_writel(pcie, cpu_addr & (~AXI_WINDOW_ALIGN_MASK), - PAB_AXI_AMAP_AXI_WIN(win_num)); + PAB_AXI_AMAP_AXI_WIN(win_num)); value = csr_readl(pcie, PAB_AXI_AMAP_PEX_WIN_H(win_num)); csr_writel(pcie, lower_32_bits(pci_addr), - PAB_AXI_AMAP_PEX_WIN_L(win_num)); + PAB_AXI_AMAP_PEX_WIN_L(win_num)); csr_writel(pcie, upper_32_bits(pci_addr), - PAB_AXI_AMAP_PEX_WIN_H(win_num)); + PAB_AXI_AMAP_PEX_WIN_H(win_num)); pcie->ob_wins_configured++; } @@ -538,7 +543,9 @@ static int mobiveil_bringup_link(struct mobiveil_pcie *pcie) usleep_range(LINK_WAIT_MIN, LINK_WAIT_MAX); } + dev_err(&pcie->pdev->dev, "link never came up\n"); + return -ETIMEDOUT; } @@ -551,16 +558,16 @@ static void mobiveil_pcie_enable_msi(struct mobiveil_pcie *pcie) msi->msi_pages_phys = (phys_addr_t)msg_addr; writel_relaxed(lower_32_bits(msg_addr), - pcie->apb_csr_base + MSI_BASE_LO_OFFSET); + pcie->apb_csr_base + MSI_BASE_LO_OFFSET); writel_relaxed(upper_32_bits(msg_addr), - pcie->apb_csr_base + MSI_BASE_HI_OFFSET); + pcie->apb_csr_base + MSI_BASE_HI_OFFSET); writel_relaxed(4096, pcie->apb_csr_base + MSI_SIZE_OFFSET); writel_relaxed(1, pcie->apb_csr_base + MSI_ENABLE_OFFSET); } static int mobiveil_host_init(struct mobiveil_pcie *pcie) { - u32 value, pab_ctrl, type = 0; + u32 value, pab_ctrl, type; int err; struct resource_entry *win, *tmp; @@ -575,26 +582,27 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie) * Space */ value = csr_readl(pcie, PCI_COMMAND); - csr_writel(pcie, value | PCI_COMMAND_IO | PCI_COMMAND_MEMORY | - PCI_COMMAND_MASTER, PCI_COMMAND); + value |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER; + 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); - csr_writel(pcie, pab_ctrl | (1 << AMBA_PIO_ENABLE_SHIFT) | - (1 << PEX_PIO_ENABLE_SHIFT), PAB_CTRL); + pab_ctrl |= (1 << AMBA_PIO_ENABLE_SHIFT) | (1 << PEX_PIO_ENABLE_SHIFT); + csr_writel(pcie, pab_ctrl, PAB_CTRL); csr_writel(pcie, (PAB_INTP_INTX_MASK | PAB_INTP_MSI_MASK), - PAB_INTP_AMBA_MISC_ENB); + 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); - csr_writel(pcie, value | APIO_EN_MASK, PAB_AXI_PIO_CTRL); + value |= APIO_EN_MASK; + csr_writel(pcie, value, PAB_AXI_PIO_CTRL); /* * we'll program one outbound window for config reads and @@ -605,25 +613,25 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie) /* config outbound translation window */ program_ob_windows(pcie, pcie->ob_wins_configured, - pcie->ob_io_res->start, 0, CFG_WINDOW_TYPE, - resource_size(pcie->ob_io_res)); + pcie->ob_io_res->start, 0, CFG_WINDOW_TYPE, + resource_size(pcie->ob_io_res)); /* memory inbound translation window */ program_ib_windows(pcie, WIN_NUM_1, 0, MEM_WINDOW_TYPE, IB_WIN_SIZE); /* Get the I/O and memory ranges from DT */ resource_list_for_each_entry_safe(win, tmp, &pcie->resources) { - type = 0; if (resource_type(win->res) == IORESOURCE_MEM) type = MEM_WINDOW_TYPE; - if (resource_type(win->res) == IORESOURCE_IO) + else if (resource_type(win->res) == IORESOURCE_IO) type = IO_WINDOW_TYPE; - if (type) { - /* configure outbound translation window */ - program_ob_windows(pcie, pcie->ob_wins_configured, - win->res->start, 0, type, - resource_size(win->res)); - } + else + continue; + + /* configure outbound translation window */ + program_ob_windows(pcie, pcie->ob_wins_configured, + win->res->start, 0, type, + resource_size(win->res)); } /* setup MSI hardware registers */ @@ -643,7 +651,8 @@ static void mobiveil_mask_intx_irq(struct irq_data *data) 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); - csr_writel(pcie, (shifted_val & (~mask)), PAB_INTP_AMBA_MISC_ENB); + shifted_val &= ~mask; + csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB); raw_spin_unlock_irqrestore(&pcie->intx_mask_lock, flags); } @@ -658,7 +667,8 @@ static void mobiveil_unmask_intx_irq(struct irq_data *data) 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); - csr_writel(pcie, (shifted_val | mask), PAB_INTP_AMBA_MISC_ENB); + shifted_val |= mask; + csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB); raw_spin_unlock_irqrestore(&pcie->intx_mask_lock, flags); } @@ -672,10 +682,11 @@ static struct irq_chip intx_irq_chip = { /* routine to setup the INTx related data */ static int mobiveil_pcie_intx_map(struct irq_domain *domain, unsigned int irq, - irq_hw_number_t hwirq) + irq_hw_number_t hwirq) { irq_set_chip_and_handler(irq, &intx_irq_chip, handle_level_irq); irq_set_chip_data(irq, domain->host_data); + return 0; } @@ -692,7 +703,7 @@ static struct irq_chip mobiveil_msi_irq_chip = { static struct msi_domain_info mobiveil_msi_domain_info = { .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | - MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX), + MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX), .chip = &mobiveil_msi_irq_chip, }; @@ -710,7 +721,7 @@ static void mobiveil_compose_msi_msg(struct irq_data *data, struct msi_msg *msg) } static int mobiveil_msi_set_affinity(struct irq_data *irq_data, - const struct cpumask *mask, bool force) + const struct cpumask *mask, bool force) { return -EINVAL; } @@ -722,7 +733,8 @@ static struct irq_chip mobiveil_msi_bottom_irq_chip = { }; static int mobiveil_irq_msi_domain_alloc(struct irq_domain *domain, - unsigned int virq, unsigned int nr_irqs, void *args) + unsigned int virq, + unsigned int nr_irqs, void *args) { struct mobiveil_pcie *pcie = domain->host_data; struct mobiveil_msi *msi = &pcie->msi; @@ -742,13 +754,13 @@ static int mobiveil_irq_msi_domain_alloc(struct irq_domain *domain, mutex_unlock(&msi->lock); irq_domain_set_info(domain, virq, bit, &mobiveil_msi_bottom_irq_chip, - domain->host_data, handle_level_irq, - NULL, NULL); + domain->host_data, handle_level_irq, NULL, NULL); return 0; } static void mobiveil_irq_msi_domain_free(struct irq_domain *domain, - unsigned int virq, unsigned int nr_irqs) + unsigned int virq, + unsigned int nr_irqs) { struct irq_data *d = irq_domain_get_irq_data(domain, virq); struct mobiveil_pcie *pcie = irq_data_get_irq_chip_data(d); @@ -756,12 +768,11 @@ static void mobiveil_irq_msi_domain_free(struct irq_domain *domain, mutex_lock(&msi->lock); - if (!test_bit(d->hwirq, msi->msi_irq_in_use)) { + if (!test_bit(d->hwirq, msi->msi_irq_in_use)) dev_err(&pcie->pdev->dev, "trying to free unused MSI#%lu\n", d->hwirq); - } else { + else __clear_bit(d->hwirq, msi->msi_irq_in_use); - } mutex_unlock(&msi->lock); } @@ -785,12 +796,14 @@ static int mobiveil_allocate_msi_domains(struct mobiveil_pcie *pcie) } msi->msi_domain = pci_msi_create_irq_domain(fwnode, - &mobiveil_msi_domain_info, msi->dev_domain); + &mobiveil_msi_domain_info, + msi->dev_domain); if (!msi->msi_domain) { dev_err(dev, "failed to create MSI domain\n"); irq_domain_remove(msi->dev_domain); return -ENOMEM; } + return 0; } @@ -801,8 +814,8 @@ static int mobiveil_pcie_init_irq_domain(struct mobiveil_pcie *pcie) int ret; /* setup INTx */ - pcie->intx_domain = irq_domain_add_linear(node, - PCI_NUM_INTX, &intx_domain_ops, pcie); + pcie->intx_domain = irq_domain_add_linear(node, PCI_NUM_INTX, + &intx_domain_ops, pcie); if (!pcie->intx_domain) { dev_err(dev, "Failed to get a INTx IRQ domain\n"); @@ -917,10 +930,10 @@ MODULE_DEVICE_TABLE(of, mobiveil_pcie_of_match); static struct platform_driver mobiveil_pcie_driver = { .probe = mobiveil_pcie_probe, .driver = { - .name = "mobiveil-pcie", - .of_match_table = mobiveil_pcie_of_match, - .suppress_bind_attrs = true, - }, + .name = "mobiveil-pcie", + .of_match_table = mobiveil_pcie_of_match, + .suppress_bind_attrs = true, + }, }; builtin_platform_driver(mobiveil_pcie_driver);