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Message-ID: <CAFZiPx0hnNc4QBKSGhyzbOHnJtSYDcR8JRd_nuVJ7eGrs_POZQ@mail.gmail.com>
Date: Fri, 8 Feb 2019 18:07:58 +0530
From: Subrahmanya Lingappa <l.subrahmanya@...iveil.co.in>
To: "Z.q. Hou" <zhiqiang.hou@....com>
Cc: "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"bhelgaas@...gle.com" <bhelgaas@...gle.com>,
"robh+dt@...nel.org" <robh+dt@...nel.org>,
"mark.rutland@....com" <mark.rutland@....com>,
"shawnguo@...nel.org" <shawnguo@...nel.org>,
Leo Li <leoyang.li@....com>,
"lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
"catalin.marinas@....com" <catalin.marinas@....com>,
"will.deacon@....com" <will.deacon@....com>,
Mingkai Hu <mingkai.hu@....com>,
"M.h. Lian" <minghuan.lian@....com>,
Xiaowei Bao <xiaowei.bao@....com>
Subject: Re: [PATCHv3 16/27] PCI: mobiveil: refactor Mobiveil PCIe Host Bridge
IP driver
On Tue, Jan 29, 2019 at 1:40 PM Z.q. Hou <zhiqiang.hou@....com> wrote:
>
> From: Hou Zhiqiang <Zhiqiang.Hou@....com>
>
> As the Mobiveil PCIe controller support RC&EP DAUL mode, and to
> make platforms which integrated the Mobiveil PCIe IP more easy
> to add their drivers, this patch moved the Mobiveil driver to
> a new directory 'drivers/pci/controller/mobiveil' and refactored
> it according to the abstraction of RC&EP (EP driver will be added
> later).
>
> Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@....com>
> Reviewed-by: Minghuan Lian <Minghuan.Lian@....com>
> ---
> V3:
> - No change
>
> MAINTAINERS | 2 +-
> drivers/pci/controller/Kconfig | 11 +-
> drivers/pci/controller/Makefile | 2 +-
> drivers/pci/controller/mobiveil/Kconfig | 24 +
> drivers/pci/controller/mobiveil/Makefile | 4 +
> .../pcie-mobiveil-host.c} | 528 +++---------------
> .../controller/mobiveil/pcie-mobiveil-plat.c | 54 ++
> .../pci/controller/mobiveil/pcie-mobiveil.c | 228 ++++++++
> .../pci/controller/mobiveil/pcie-mobiveil.h | 187 +++++++
> 9 files changed, 587 insertions(+), 453 deletions(-)
> create mode 100644 drivers/pci/controller/mobiveil/Kconfig
> create mode 100644 drivers/pci/controller/mobiveil/Makefile
> rename drivers/pci/controller/{pcie-mobiveil.c => mobiveil/pcie-mobiveil-host.c} (55%)
> create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil-plat.c
> create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil.c
> create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil.h
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index ddcdc29dfe1f..3bca9642b08b 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -11709,7 +11709,7 @@ M: Subrahmanya Lingappa <l.subrahmanya@...iveil.co.in>
> L: linux-pci@...r.kernel.org
> S: Supported
> F: Documentation/devicetree/bindings/pci/mobiveil-pcie.txt
> -F: drivers/pci/controller/pcie-mobiveil.c
> +F: drivers/pci/controller/mobiveil/pcie-mobiveil*
>
> PCI DRIVER FOR MVEBU (Marvell Armada 370 and Armada XP SOC support)
> M: Thomas Petazzoni <thomas.petazzoni@...tlin.com>
> diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
> index 6671946dbf66..0e981ed00a75 100644
> --- a/drivers/pci/controller/Kconfig
> +++ b/drivers/pci/controller/Kconfig
> @@ -241,16 +241,6 @@ config PCIE_MEDIATEK
> Say Y here if you want to enable PCIe controller support on
> MediaTek SoCs.
>
> -config PCIE_MOBIVEIL
> - bool "Mobiveil AXI PCIe controller"
> - depends on ARCH_ZYNQMP || COMPILE_TEST
> - depends on OF
> - depends on PCI_MSI_IRQ_DOMAIN
> - help
> - Say Y here if you want to enable support for the Mobiveil AXI PCIe
> - Soft IP. It has up to 8 outbound and inbound windows
> - for address translation and it is a PCIe Gen4 IP.
> -
> config PCIE_TANGO_SMP8759
> bool "Tango SMP8759 PCIe controller (DANGEROUS)"
> depends on ARCH_TANGO && PCI_MSI && OF
> @@ -281,4 +271,5 @@ config VMD
> module will be called vmd.
>
> source "drivers/pci/controller/dwc/Kconfig"
> +source "drivers/pci/controller/mobiveil/Kconfig"
> endmenu
> diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile
> index d56a507495c5..b79a615041a0 100644
> --- a/drivers/pci/controller/Makefile
> +++ b/drivers/pci/controller/Makefile
> @@ -26,11 +26,11 @@ obj-$(CONFIG_PCIE_ROCKCHIP) += pcie-rockchip.o
> obj-$(CONFIG_PCIE_ROCKCHIP_EP) += pcie-rockchip-ep.o
> obj-$(CONFIG_PCIE_ROCKCHIP_HOST) += pcie-rockchip-host.o
> obj-$(CONFIG_PCIE_MEDIATEK) += pcie-mediatek.o
> -obj-$(CONFIG_PCIE_MOBIVEIL) += pcie-mobiveil.o
> obj-$(CONFIG_PCIE_TANGO_SMP8759) += pcie-tango.o
> obj-$(CONFIG_VMD) += vmd.o
> # pcie-hisi.o quirks are needed even without CONFIG_PCIE_DW
> obj-y += dwc/
> +obj-y += mobiveil/
>
>
> # The following drivers are for devices that use the generic ACPI
> diff --git a/drivers/pci/controller/mobiveil/Kconfig b/drivers/pci/controller/mobiveil/Kconfig
> new file mode 100644
> index 000000000000..64343c07bfed
> --- /dev/null
> +++ b/drivers/pci/controller/mobiveil/Kconfig
> @@ -0,0 +1,24 @@
> +# SPDX-License-Identifier: GPL-2.0
> +
> +menu "Mobiveil PCIe Core Support"
> + depends on PCI
> +
> +config PCIE_MOBIVEIL
> + bool
> +
> +config PCIE_MOBIVEIL_HOST
> + bool
> + depends on PCI_MSI_IRQ_DOMAIN
> + select PCIE_MOBIVEIL
> +
> +config PCIE_MOBIVEIL_PLAT
> + bool "Mobiveil AXI PCIe controller"
> + depends on ARCH_ZYNQMP || COMPILE_TEST
> + depends on OF
> + select PCIE_MOBIVEIL_HOST
> + help
> + Say Y here if you want to enable support for the Mobiveil AXI PCIe
> + Soft IP. It has up to 8 outbound and inbound windows
> + for address translation and it is a PCIe Gen4 IP.
> +
> +endmenu
> diff --git a/drivers/pci/controller/mobiveil/Makefile b/drivers/pci/controller/mobiveil/Makefile
> new file mode 100644
> index 000000000000..9fb6d1c6504d
> --- /dev/null
> +++ b/drivers/pci/controller/mobiveil/Makefile
> @@ -0,0 +1,4 @@
> +# SPDX-License-Identifier: GPL-2.0
> +obj-$(CONFIG_PCIE_MOBIVEIL) += pcie-mobiveil.o
> +obj-$(CONFIG_PCIE_MOBIVEIL_HOST) += pcie-mobiveil-host.o
> +obj-$(CONFIG_PCIE_MOBIVEIL_PLAT) += pcie-mobiveil-plat.o
> diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
> similarity index 55%
> rename from drivers/pci/controller/pcie-mobiveil.c
> rename to drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
> index 9210165fe8c0..dc5324d94466 100644
> --- a/drivers/pci/controller/pcie-mobiveil.c
> +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
> @@ -4,9 +4,9 @@
> *
> * Copyright (c) 2018 Mobiveil Inc.
> * Author: Subrahmanya Lingappa <l.subrahmanya@...iveil.co.in>
> + * Refactor: Zhiqiang Hou <Zhiqiang.Hou@....com>
> */
>
> -#include <linux/delay.h>
> #include <linux/init.h>
> #include <linux/interrupt.h>
> #include <linux/irq.h>
> @@ -23,275 +23,21 @@
> #include <linux/platform_device.h>
> #include <linux/slab.h>
>
> -#include "../pci.h"
> -
> -/* register offsets and bit positions */
> -
> -/*
> - * 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_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 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_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_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 WIN_TYPE_MASK 0x3
> -#define WIN_SIZE_SHIFT 10
> -#define WIN_SIZE_MASK 0x3fffff
> -
> -#define PAB_EXT_AXI_AMAP_SIZE(win) PAB_EXT_REG_ADDR(0xbaf0, win)
> -
> -#define PAB_EXT_AXI_AMAP_AXI_WIN(win) PAB_EXT_REG_ADDR(0x80a0, win)
> -#define PAB_AXI_AMAP_AXI_WIN(win) PAB_REG_ADDR(0x0ba4, win)
> -#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_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 AMAP_CTRL_TYPE_MASK 3
> -
> -#define PAB_EXT_PEX_AMAP_SIZEN(win) PAB_EXT_REG_ADDR(0xbef0, win)
> -#define PAB_EXT_PEX_AMAP_AXI_WIN(win) PAB_EXT_REG_ADDR(0xb4a0, win)
> -#define PAB_PEX_AMAP_AXI_WIN(win) PAB_REG_ADDR(0x4ba4, win)
> -#define PAB_PEX_AMAP_PEX_WIN_L(win) PAB_REG_ADDR(0x4ba8, win)
> -#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
> -
> -/* supported number of MSI interrupts */
> -#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
> -
> -/* 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
> -
> -/* 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 PAGED_ADDR_BNDRY 0xc00
> -#define OFFSET_TO_PAGE_ADDR(off) \
> - ((off & PAGE_LO_MASK) | PAGED_ADDR_BNDRY)
> -#define OFFSET_TO_PAGE_IDX(off) \
> - ((off >> PAGE_SEL_OFFSET_SHIFT) & PAGE_SEL_MASK)
> -
> -struct mobiveil_msi { /* MSI information */
> - struct mutex lock; /* protect bitmap variable */
> - struct irq_domain *msi_domain;
> - struct irq_domain *dev_domain;
> - phys_addr_t msi_pages_phys;
> - int num_of_vectors;
> - DECLARE_BITMAP(msi_irq_in_use, PCI_NUM_MSI);
> -};
> -
> -struct mobiveil_pcie {
> - struct platform_device *pdev;
> - struct list_head resources;
> - void __iomem *config_axi_slave_base; /* endpoint config base */
> - void __iomem *csr_axi_slave_base; /* root port config base */
> - void __iomem *apb_csr_base; /* MSI register base */
> - phys_addr_t pcie_reg_base; /* Physical PCIe Controller Base */
> - struct irq_domain *intx_domain;
> - raw_spinlock_t intx_mask_lock;
> - int irq;
> - int apio_wins;
> - int ppio_wins;
> - int ob_wins_configured; /* configured outbound windows */
> - int ib_wins_configured; /* configured inbound windows */
> - struct resource *ob_io_res;
> - char root_bus_nr;
> - struct mobiveil_msi msi;
> -};
> -
> -/*
> - * mobiveil_pcie_sel_page - routine to access paged register
> - *
> - * Registers whose address greater than PAGED_ADDR_BNDRY (0xc00) are paged,
> - * for this scheme to work extracted higher 6 bits of the offset will be
> - * written to pg_sel field of PAB_CTRL register and rest of the lower 10
> - * bits enabled with PAGED_ADDR_BNDRY are used as offset of the register.
> - */
> -static void mobiveil_pcie_sel_page(struct mobiveil_pcie *pcie, u8 pg_idx)
> -{
> - u32 val;
> -
> - val = readl(pcie->csr_axi_slave_base + PAB_CTRL);
> - val &= ~(PAGE_SEL_MASK << PAGE_SEL_SHIFT);
> - val |= (pg_idx & PAGE_SEL_MASK) << PAGE_SEL_SHIFT;
> -
> - writel(val, pcie->csr_axi_slave_base + PAB_CTRL);
> -}
> -
> -static void *mobiveil_pcie_comp_addr(struct mobiveil_pcie *pcie, u32 off)
> -{
> - if (off < PAGED_ADDR_BNDRY) {
> - /* For directly accessed registers, clear the pg_sel field */
> - mobiveil_pcie_sel_page(pcie, 0);
> - return pcie->csr_axi_slave_base + off;
> - }
> -
> - mobiveil_pcie_sel_page(pcie, OFFSET_TO_PAGE_IDX(off));
> - return pcie->csr_axi_slave_base + OFFSET_TO_PAGE_ADDR(off);
> -}
> -
> -static int mobiveil_pcie_read(void __iomem *addr, int size, u32 *val)
> -{
> - if ((uintptr_t)addr & (size - 1)) {
> - *val = 0;
> - return PCIBIOS_BAD_REGISTER_NUMBER;
> - }
> -
> - switch (size) {
> - case 4:
> - *val = readl(addr);
> - break;
> - case 2:
> - *val = readw(addr);
> - break;
> - case 1:
> - *val = readb(addr);
> - break;
> - default:
> - *val = 0;
> - return PCIBIOS_BAD_REGISTER_NUMBER;
> - }
> -
> - return PCIBIOS_SUCCESSFUL;
> -}
> -
> -static int mobiveil_pcie_write(void __iomem *addr, int size, u32 val)
> -{
> - if ((uintptr_t)addr & (size - 1))
> - return PCIBIOS_BAD_REGISTER_NUMBER;
> -
> - switch (size) {
> - case 4:
> - writel(val, addr);
> - break;
> - case 2:
> - writew(val, addr);
> - break;
> - case 1:
> - writeb(val, addr);
> - break;
> - default:
> - return PCIBIOS_BAD_REGISTER_NUMBER;
> - }
> -
> - return PCIBIOS_SUCCESSFUL;
> -}
> -
> -static u32 csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size)
> -{
> - void *addr;
> - u32 val;
> - int ret;
> -
> - addr = mobiveil_pcie_comp_addr(pcie, off);
> -
> - ret = mobiveil_pcie_read(addr, size, &val);
> - if (ret)
> - dev_err(&pcie->pdev->dev, "read CSR address failed\n");
> -
> - return val;
> -}
> -
> -static void csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off, size_t size)
> -{
> - void *addr;
> - int ret;
> -
> - addr = mobiveil_pcie_comp_addr(pcie, off);
> -
> - ret = mobiveil_pcie_write(addr, size, val);
> - if (ret)
> - dev_err(&pcie->pdev->dev, "write CSR address failed\n");
> -}
> -
> -static u32 csr_readl(struct mobiveil_pcie *pcie, u32 off)
> -{
> - return csr_read(pcie, off, 0x4);
> -}
> -
> -static void csr_writel(struct mobiveil_pcie *pcie, u32 val, u32 off)
> -{
> - csr_write(pcie, val, off, 0x4);
> -}
> -
> -static bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie)
> -{
> - return (csr_readl(pcie, LTSSM_STATUS) &
> - LTSSM_STATUS_L0_MASK) == LTSSM_STATUS_L0;
> -}
> +#include "pcie-mobiveil.h"
>
> static bool mobiveil_pcie_valid_device(struct pci_bus *bus, unsigned int devfn)
> {
> struct mobiveil_pcie *pcie = bus->sysdata;
>
> /* Only one device down on each root port */
> - if ((bus->number == pcie->root_bus_nr) && (devfn > 0))
> + if ((bus->number == pcie->rp.root_bus_nr) && (devfn > 0))
> return false;
>
> /*
> * Do not read more than one device on the bus directly
> * attached to RC
> */
> - if ((bus->primary == pcie->root_bus_nr) && (devfn > 0))
> + if ((bus->primary == pcie->rp.root_bus_nr) && (devfn > 0))
> return false;
>
> return true;
> @@ -311,7 +57,7 @@ static void __iomem *mobiveil_pcie_map_bus(struct pci_bus *bus,
> return NULL;
>
> /* RC config access */
> - if (bus->number == pcie->root_bus_nr)
> + if (bus->number == pcie->rp.root_bus_nr)
> return pcie->csr_axi_slave_base + where;
>
> /*
> @@ -326,7 +72,7 @@ static void __iomem *mobiveil_pcie_map_bus(struct pci_bus *bus,
>
> csr_writel(pcie, value, PAB_AXI_AMAP_PEX_WIN_L(WIN_NUM_0));
>
> - return pcie->config_axi_slave_base + where;
> + return pcie->rp.config_axi_slave_base + where;
> }
>
> static struct pci_ops mobiveil_pcie_ops = {
> @@ -340,7 +86,7 @@ static void mobiveil_pcie_isr(struct irq_desc *desc)
> struct irq_chip *chip = irq_desc_get_chip(desc);
> struct mobiveil_pcie *pcie = irq_desc_get_handler_data(desc);
> struct device *dev = &pcie->pdev->dev;
> - struct mobiveil_msi *msi = &pcie->msi;
> + struct mobiveil_msi *msi = &pcie->rp.msi;
> u32 msi_data, msi_addr_lo, msi_addr_hi;
> u32 intr_status, msi_status;
> unsigned long shifted_status;
> @@ -365,7 +111,7 @@ static void mobiveil_pcie_isr(struct irq_desc *desc)
> shifted_status >>= PAB_INTX_START;
> do {
> for_each_set_bit(bit, &shifted_status, PCI_NUM_INTX) {
> - virq = irq_find_mapping(pcie->intx_domain,
> + virq = irq_find_mapping(pcie->rp.intx_domain,
> bit + 1);
> if (virq)
> generic_handle_irq(virq);
> @@ -428,10 +174,10 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie)
> /* map config resource */
> res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> "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);
> - pcie->ob_io_res = res;
> + pcie->rp.config_axi_slave_base = devm_pci_remap_cfg_resource(dev, res);
> + if (IS_ERR(pcie->rp.config_axi_slave_base))
> + return PTR_ERR(pcie->rp.config_axi_slave_base);
> + pcie->rp.ob_io_res = res;
>
> /* map csr resource */
> res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> @@ -441,12 +187,6 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie)
> return PTR_ERR(pcie->csr_axi_slave_base);
> pcie->pcie_reg_base = res->start;
>
> - /* map MSI config resource */
> - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "apb_csr");
> - pcie->apb_csr_base = devm_pci_remap_cfg_resource(dev, res);
> - if (IS_ERR(pcie->apb_csr_base))
> - return PTR_ERR(pcie->apb_csr_base);
> -
> /* read the number of windows requested */
> if (of_property_read_u32(node, "apio-wins", &pcie->apio_wins))
> pcie->apio_wins = MAX_PIO_WINDOWS;
> @@ -454,119 +194,15 @@ static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie)
> if (of_property_read_u32(node, "ppio-wins", &pcie->ppio_wins))
> pcie->ppio_wins = MAX_PIO_WINDOWS;
>
> - pcie->irq = platform_get_irq(pdev, 0);
> - if (pcie->irq <= 0) {
> - dev_err(dev, "failed to map IRQ: %d\n", pcie->irq);
> - return -ENODEV;
> - }
> -
> return 0;
> }
>
> -static void program_ib_windows(struct mobiveil_pcie *pcie, int win_num,
> - u64 cpu_addr, u64 pci_addr, u32 type, u64 size)
> -{
> - u32 value;
> - u64 size64 = ~(size - 1);
> -
> - if (win_num >= pcie->ppio_wins) {
> - dev_err(&pcie->pdev->dev,
> - "ERROR: max inbound windows reached !\n");
> - return;
> - }
> -
> - value = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num));
> - value &= ~(AMAP_CTRL_TYPE_MASK << AMAP_CTRL_TYPE_SHIFT |
> - WIN_SIZE_MASK << WIN_SIZE_SHIFT);
> - value |= (type << AMAP_CTRL_TYPE_SHIFT) | (1 << AMAP_CTRL_EN_SHIFT) |
> - (lower_32_bits(size64) & WIN_SIZE_MASK << WIN_SIZE_SHIFT);
> - csr_writel(pcie, value, PAB_PEX_AMAP_CTRL(win_num));
> -
> - 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));
> -
> - 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));
> -
> - pcie->ib_wins_configured++;
> -}
> -
> -/*
> - * 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 type, u64 size)
> -{
> -
> - u32 value;
> - u64 size64 = ~(size - 1);
> -
> - if (win_num >= pcie->apio_wins) {
> - dev_err(&pcie->pdev->dev,
> - "ERROR: max outbound windows reached !\n");
> - return;
> - }
> -
> - /*
> - * 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 &= ~(WIN_TYPE_MASK << WIN_TYPE_SHIFT |
> - WIN_SIZE_MASK << WIN_SIZE_SHIFT);
> - value |= 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT |
> - (lower_32_bits(size64) & WIN_SIZE_MASK << WIN_SIZE_SHIFT);
> - csr_writel(pcie, value, PAB_AXI_AMAP_CTRL(win_num));
> -
> - 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));
> -
> - 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));
> -
> - pcie->ob_wins_configured++;
> -}
> -
> -static int mobiveil_bringup_link(struct mobiveil_pcie *pcie)
> -{
> - int retries;
> -
> - /* check if the link is up or not */
> - for (retries = 0; retries < LINK_WAIT_MAX_RETRIES; retries++) {
> - if (mobiveil_pcie_link_up(pcie))
> - return 0;
> -
> - usleep_range(LINK_WAIT_MIN, LINK_WAIT_MAX);
> - }
> -
> - dev_err(&pcie->pdev->dev, "link never came up\n");
> -
> - return -ETIMEDOUT;
> -}
> -
> static void mobiveil_pcie_enable_msi(struct mobiveil_pcie *pcie)
> {
> phys_addr_t msg_addr = pcie->pcie_reg_base;
> - struct mobiveil_msi *msi = &pcie->msi;
> + struct mobiveil_msi *msi = &pcie->rp.msi;
>
> - pcie->msi.num_of_vectors = PCI_NUM_MSI;
> + msi->num_of_vectors = PCI_NUM_MSI;
> msi->msi_pages_phys = (phys_addr_t)msg_addr;
>
> writel_relaxed(lower_32_bits(msg_addr),
> @@ -604,9 +240,6 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
> 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);
> -
> /*
> * program PIO Enable Bit to 1 and Config Window Enable Bit to 1 in
> * PAB_AXI_PIO_CTRL Register
> @@ -628,20 +261,24 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
> */
>
> /* config outbound translation window */
> - program_ob_windows(pcie, WIN_NUM_0, pcie->ob_io_res->start, 0,
> - CFG_WINDOW_TYPE, resource_size(pcie->ob_io_res));
> + program_ob_windows(pcie, WIN_NUM_0, pcie->rp.ob_io_res->start, 0,
> + CFG_WINDOW_TYPE, resource_size(pcie->rp.ob_io_res));
>
> /* memory inbound translation window */
> program_ib_windows(pcie, WIN_NUM_0, 0, 0, MEM_WINDOW_TYPE, IB_WIN_SIZE);
>
> /* Get the I/O and memory ranges from DT */
> resource_list_for_each_entry(win, &pcie->resources) {
> - if (resource_type(win->res) == IORESOURCE_MEM)
> + if (resource_type(win->res) == IORESOURCE_MEM) {
> type = MEM_WINDOW_TYPE;
> - else if (resource_type(win->res) == IORESOURCE_IO)
> + } else if (resource_type(win->res) == IORESOURCE_IO) {
> type = IO_WINDOW_TYPE;
> - else
> + } else if (resource_type(win->res) == IORESOURCE_BUS) {
> + pcie->rp.root_bus_nr = win->res->start;
> + continue;
> + } else {
> continue;
> + }
>
> /* configure outbound translation window */
> program_ob_windows(pcie, pcie->ob_wins_configured,
> @@ -656,9 +293,6 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
> value |= (PCI_CLASS_BRIDGE_PCI << 16);
> csr_writel(pcie, value, PAB_INTP_AXI_PIO_CLASS);
>
> - /* setup MSI hardware registers */
> - mobiveil_pcie_enable_msi(pcie);
> -
> return 0;
> }
>
> @@ -671,11 +305,11 @@ 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);
> + raw_spin_lock_irqsave(&pcie->rp.intx_mask_lock, flags);
> shifted_val = csr_readl(pcie, 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);
> + raw_spin_unlock_irqrestore(&pcie->rp.intx_mask_lock, flags);
> }
>
> static void mobiveil_unmask_intx_irq(struct irq_data *data)
> @@ -687,11 +321,11 @@ 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);
> + raw_spin_lock_irqsave(&pcie->rp.intx_mask_lock, flags);
> shifted_val = csr_readl(pcie, 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);
> + raw_spin_unlock_irqrestore(&pcie->rp.intx_mask_lock, flags);
> }
>
> static struct irq_chip intx_irq_chip = {
> @@ -759,7 +393,7 @@ static int mobiveil_irq_msi_domain_alloc(struct irq_domain *domain,
> unsigned int nr_irqs, void *args)
> {
> struct mobiveil_pcie *pcie = domain->host_data;
> - struct mobiveil_msi *msi = &pcie->msi;
> + struct mobiveil_msi *msi = &pcie->rp.msi;
> unsigned long bit;
>
> WARN_ON(nr_irqs != 1);
> @@ -786,7 +420,7 @@ static void mobiveil_irq_msi_domain_free(struct irq_domain *domain,
> {
> struct irq_data *d = irq_domain_get_irq_data(domain, virq);
> struct mobiveil_pcie *pcie = irq_data_get_irq_chip_data(d);
> - struct mobiveil_msi *msi = &pcie->msi;
> + struct mobiveil_msi *msi = &pcie->rp.msi;
>
> mutex_lock(&msi->lock);
>
> @@ -807,9 +441,9 @@ static int mobiveil_allocate_msi_domains(struct mobiveil_pcie *pcie)
> {
> struct device *dev = &pcie->pdev->dev;
> struct fwnode_handle *fwnode = of_node_to_fwnode(dev->of_node);
> - struct mobiveil_msi *msi = &pcie->msi;
> + struct mobiveil_msi *msi = &pcie->rp.msi;
>
> - mutex_init(&pcie->msi.lock);
> + mutex_init(&msi->lock);
> msi->dev_domain = irq_domain_add_linear(NULL, msi->num_of_vectors,
> &msi_domain_ops, pcie);
> if (!msi->dev_domain) {
> @@ -836,15 +470,15 @@ 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->rp.intx_domain = irq_domain_add_linear(node, PCI_NUM_INTX,
> + &intx_domain_ops, pcie);
>
> - if (!pcie->intx_domain) {
> + if (!pcie->rp.intx_domain) {
> dev_err(dev, "Failed to get a INTx IRQ domain\n");
> return -ENOMEM;
> }
>
> - raw_spin_lock_init(&pcie->intx_mask_lock);
> + raw_spin_lock_init(&pcie->rp.intx_mask_lock);
>
> /* setup MSI */
> ret = mobiveil_allocate_msi_domains(pcie);
> @@ -854,24 +488,58 @@ static int mobiveil_pcie_init_irq_domain(struct mobiveil_pcie *pcie)
> return 0;
> }
>
> -static int mobiveil_pcie_probe(struct platform_device *pdev)
> +static int mobiveil_pcie_interrupt_init(struct mobiveil_pcie *pcie)
> +{
> + struct device *dev = &pcie->pdev->dev;
> + struct resource *res;
> + int ret;
> +
> + if (pcie->rp.ops->interrupt_init)
> + return pcie->rp.ops->interrupt_init(pcie);
> +
> + /* map MSI config resource */
> + res = platform_get_resource_byname(pcie->pdev, IORESOURCE_MEM,
> + "apb_csr");
> + pcie->apb_csr_base = devm_pci_remap_cfg_resource(dev, res);
> + if (IS_ERR(pcie->apb_csr_base))
> + return PTR_ERR(pcie->apb_csr_base);
> +
> + /* setup MSI hardware registers */
> + mobiveil_pcie_enable_msi(pcie);
> +
> + pcie->rp.irq = platform_get_irq(pcie->pdev, 0);
> + if (pcie->rp.irq <= 0) {
> + dev_err(dev, "failed to map IRQ: %d\n", pcie->rp.irq);
> + return -ENODEV;
> + }
> +
> + /* initialize the IRQ domains */
> + ret = mobiveil_pcie_init_irq_domain(pcie);
> + if (ret) {
> + dev_err(dev, "Failed creating IRQ Domain\n");
> + return ret;
> + }
> +
> + irq_set_chained_handler_and_data(pcie->rp.irq,
> + mobiveil_pcie_isr, pcie);
> +
> + /* Enable interrupts */
> + csr_writel(pcie, (PAB_INTP_INTX_MASK | PAB_INTP_MSI_MASK),
> + PAB_INTP_AMBA_MISC_ENB);
> +
> + return 0;
> +}
> +
> +int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie)
> {
> - struct mobiveil_pcie *pcie;
> struct pci_bus *bus;
> struct pci_bus *child;
> struct pci_host_bridge *bridge;
> - struct device *dev = &pdev->dev;
> + struct device *dev = &pcie->pdev->dev;
> resource_size_t iobase;
> int ret;
>
> - /* allocate the PCIe port */
> - bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
> - if (!bridge)
> - return -ENOMEM;
> -
> - pcie = pci_host_bridge_priv(bridge);
> -
> - pcie->pdev = pdev;
> + INIT_LIST_HEAD(&pcie->resources);
>
> ret = mobiveil_pcie_parse_dt(pcie);
> if (ret) {
> @@ -879,7 +547,10 @@ static int mobiveil_pcie_probe(struct platform_device *pdev)
> return ret;
> }
>
> - INIT_LIST_HEAD(&pcie->resources);
> + /* allocate the PCIe port */
> + bridge = devm_pci_alloc_host_bridge(dev, 0);
> + if (!bridge)
> + return -ENOMEM;
>
> /* parse the host bridge base addresses from the device tree file */
> ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff,
> @@ -899,15 +570,12 @@ static int mobiveil_pcie_probe(struct platform_device *pdev)
> goto error;
> }
>
> - /* initialize the IRQ domains */
> - ret = mobiveil_pcie_init_irq_domain(pcie);
> + ret = mobiveil_pcie_interrupt_init(pcie);
> if (ret) {
> - dev_err(dev, "Failed creating IRQ Domain\n");
> + dev_err(dev, "Interrupt init failed\n");
> goto error;
> }
>
> - irq_set_chained_handler_and_data(pcie->irq, mobiveil_pcie_isr, pcie);
> -
> ret = devm_request_pci_bus_resources(dev, &pcie->resources);
> if (ret)
> goto error;
> @@ -916,7 +584,7 @@ static int mobiveil_pcie_probe(struct platform_device *pdev)
> list_splice_init(&pcie->resources, &bridge->windows);
> bridge->dev.parent = dev;
> bridge->sysdata = pcie;
> - bridge->busnr = pcie->root_bus_nr;
> + bridge->busnr = pcie->rp.root_bus_nr;
> bridge->ops = &mobiveil_pcie_ops;
> bridge->map_irq = of_irq_parse_and_map_pci;
> bridge->swizzle_irq = pci_common_swizzle;
> @@ -944,25 +612,3 @@ static int mobiveil_pcie_probe(struct platform_device *pdev)
> pci_free_resource_list(&pcie->resources);
> return ret;
> }
> -
> -static const struct of_device_id mobiveil_pcie_of_match[] = {
> - {.compatible = "mbvl,gpex40-pcie",},
> - {},
> -};
> -
> -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,
> - },
> -};
> -
> -builtin_platform_driver(mobiveil_pcie_driver);
> -
> -MODULE_LICENSE("GPL v2");
> -MODULE_DESCRIPTION("Mobiveil PCIe host controller driver");
> -MODULE_AUTHOR("Subrahmanya Lingappa <l.subrahmanya@...iveil.co.in>");
> diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-plat.c b/drivers/pci/controller/mobiveil/pcie-mobiveil-plat.c
> new file mode 100644
> index 000000000000..216c62f35568
> --- /dev/null
> +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-plat.c
> @@ -0,0 +1,54 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * PCIe host controller driver for Mobiveil PCIe Host controller
> + *
> + * Copyright (c) 2018 Mobiveil Inc.
> + * Author: Subrahmanya Lingappa <l.subrahmanya@...iveil.co.in>
> + * Refactor: Zhiqiang Hou <Zhiqiang.Hou@....com>
> + */
> +
> +#include <linux/init.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/of_pci.h>
> +#include <linux/pci.h>
> +#include <linux/platform_device.h>
> +#include <linux/slab.h>
> +
> +#include "pcie-mobiveil.h"
> +
> +static int mobiveil_pcie_probe(struct platform_device *pdev)
> +{
> + struct mobiveil_pcie *pcie;
> + struct device *dev = &pdev->dev;
> +
> + pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
> + if (!pcie)
> + return -ENOMEM;
> +
> + pcie->pdev = pdev;
> +
> + return mobiveil_pcie_host_probe(pcie);
> +}
> +
> +static const struct of_device_id mobiveil_pcie_of_match[] = {
> + {.compatible = "mbvl,gpex40-pcie",},
> + {},
> +};
> +
> +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,
> + },
> +};
> +
> +builtin_platform_driver(mobiveil_pcie_driver);
> +
> +MODULE_LICENSE("GPL v2");
> +MODULE_DESCRIPTION("Mobiveil PCIe host controller driver");
> +MODULE_AUTHOR("Subrahmanya Lingappa <l.subrahmanya@...iveil.co.in>");
> diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.c b/drivers/pci/controller/mobiveil/pcie-mobiveil.c
> new file mode 100644
> index 000000000000..ee678a60825d
> --- /dev/null
> +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.c
> @@ -0,0 +1,228 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * PCIe host controller driver for Mobiveil PCIe Host controller
> + *
> + * Copyright (c) 2018 Mobiveil Inc.
> + * Author: Subrahmanya Lingappa <l.subrahmanya@...iveil.co.in>
> + * Refactor: Zhiqiang Hou <Zhiqiang.Hou@....com>
> + */
> +
> +#include <linux/delay.h>
> +#include <linux/init.h>
> +#include <linux/kernel.h>
> +#include <linux/pci.h>
> +#include <linux/platform_device.h>
> +
> +#include "pcie-mobiveil.h"
> +
> +/*
> + * mobiveil_pcie_sel_page - routine to access paged register
> + *
> + * Registers whose address greater than PAGED_ADDR_BNDRY (0xc00) are paged,
> + * for this scheme to work extracted higher 6 bits of the offset will be
> + * written to pg_sel field of PAB_CTRL register and rest of the lower 10
> + * bits enabled with PAGED_ADDR_BNDRY are used as offset of the register.
> + */
> +static void mobiveil_pcie_sel_page(struct mobiveil_pcie *pcie, u8 pg_idx)
> +{
> + u32 val;
> +
> + val = readl(pcie->csr_axi_slave_base + PAB_CTRL);
> + val &= ~(PAGE_SEL_MASK << PAGE_SEL_SHIFT);
> + val |= (pg_idx & PAGE_SEL_MASK) << PAGE_SEL_SHIFT;
> +
> + writel(val, pcie->csr_axi_slave_base + PAB_CTRL);
> +}
> +
> +static void *mobiveil_pcie_comp_addr(struct mobiveil_pcie *pcie, u32 off)
> +{
> + if (off < PAGED_ADDR_BNDRY) {
> + /* For directly accessed registers, clear the pg_sel field */
> + mobiveil_pcie_sel_page(pcie, 0);
> + return pcie->csr_axi_slave_base + off;
> + }
> +
> + mobiveil_pcie_sel_page(pcie, OFFSET_TO_PAGE_IDX(off));
> + return pcie->csr_axi_slave_base + OFFSET_TO_PAGE_ADDR(off);
> +}
> +
> +static int mobiveil_pcie_read(void __iomem *addr, int size, u32 *val)
> +{
> + if ((uintptr_t)addr & (size - 1)) {
> + *val = 0;
> + return PCIBIOS_BAD_REGISTER_NUMBER;
> + }
> +
> + switch (size) {
> + case 4:
> + *val = readl(addr);
> + break;
> + case 2:
> + *val = readw(addr);
> + break;
> + case 1:
> + *val = readb(addr);
> + break;
> + default:
> + *val = 0;
> + return PCIBIOS_BAD_REGISTER_NUMBER;
> + }
> +
> + return PCIBIOS_SUCCESSFUL;
> +}
> +
> +static int mobiveil_pcie_write(void __iomem *addr, int size, u32 val)
> +{
> + if ((uintptr_t)addr & (size - 1))
> + return PCIBIOS_BAD_REGISTER_NUMBER;
> +
> + switch (size) {
> + case 4:
> + writel(val, addr);
> + break;
> + case 2:
> + writew(val, addr);
> + break;
> + case 1:
> + writeb(val, addr);
> + break;
> + default:
> + return PCIBIOS_BAD_REGISTER_NUMBER;
> + }
> +
> + return PCIBIOS_SUCCESSFUL;
> +}
> +
> +u32 csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size)
> +{
> + void *addr;
> + u32 val;
> + int ret;
> +
> + addr = mobiveil_pcie_comp_addr(pcie, off);
> +
> + ret = mobiveil_pcie_read(addr, size, &val);
> + if (ret)
> + dev_err(&pcie->pdev->dev, "read CSR address failed\n");
> +
> + return val;
> +}
> +
> +void csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off, size_t size)
> +{
> + void *addr;
> + int ret;
> +
> + addr = mobiveil_pcie_comp_addr(pcie, off);
> +
> + ret = mobiveil_pcie_write(addr, size, val);
> + if (ret)
> + dev_err(&pcie->pdev->dev, "write CSR address failed\n");
> +}
> +
> +bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie)
> +{
> + if (pcie->ops->link_up)
> + return pcie->ops->link_up(pcie);
> +
> + return (csr_readl(pcie, LTSSM_STATUS) &
> + LTSSM_STATUS_L0_MASK) == LTSSM_STATUS_L0;
> +}
> +
> +void program_ib_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
> + u64 pci_addr, u32 type, u64 size)
> +{
> + u32 value;
> + u64 size64 = ~(size - 1);
> +
> + if (win_num >= pcie->ppio_wins) {
> + dev_err(&pcie->pdev->dev,
> + "ERROR: max inbound windows reached !\n");
> + return;
> + }
> +
> + value = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num));
> + value &= ~(AMAP_CTRL_TYPE_MASK << AMAP_CTRL_TYPE_SHIFT |
> + WIN_SIZE_MASK << WIN_SIZE_SHIFT);
> + value |= (type << AMAP_CTRL_TYPE_SHIFT) | (1 << AMAP_CTRL_EN_SHIFT) |
> + (lower_32_bits(size64) & WIN_SIZE_MASK << WIN_SIZE_SHIFT);
> + csr_writel(pcie, value, PAB_PEX_AMAP_CTRL(win_num));
> +
> + 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));
> +
> + 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));
> +
> + pcie->ib_wins_configured++;
> +}
> +
> +/*
> + * routine to program the outbound windows
> + */
> +void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
> + u64 pci_addr, u32 type, u64 size)
> +{
> +
> + u32 value;
> + u64 size64 = ~(size - 1);
> +
> + if (win_num >= pcie->apio_wins) {
> + dev_err(&pcie->pdev->dev,
> + "ERROR: max outbound windows reached !\n");
> + return;
> + }
> +
> + /*
> + * 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 &= ~(WIN_TYPE_MASK << WIN_TYPE_SHIFT |
> + WIN_SIZE_MASK << WIN_SIZE_SHIFT);
> + value |= 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT |
> + (lower_32_bits(size64) & WIN_SIZE_MASK << WIN_SIZE_SHIFT);
> + csr_writel(pcie, value, PAB_AXI_AMAP_CTRL(win_num));
> +
> + 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));
> +
> + 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));
> +
> + pcie->ob_wins_configured++;
> +}
> +
> +int mobiveil_bringup_link(struct mobiveil_pcie *pcie)
> +{
> + int retries;
> +
> + /* check if the link is up or not */
> + for (retries = 0; retries < LINK_WAIT_MAX_RETRIES; retries++) {
> + if (mobiveil_pcie_link_up(pcie))
> + return 0;
> +
> + usleep_range(LINK_WAIT_MIN, LINK_WAIT_MAX);
> + }
> +
> + dev_err(&pcie->pdev->dev, "link never came up\n");
> +
> + return -ETIMEDOUT;
> +}
> diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.h b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
> new file mode 100644
> index 000000000000..eb4cb61291a8
> --- /dev/null
> +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
> @@ -0,0 +1,187 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * PCIe host controller driver for Mobiveil PCIe Host controller
> + *
> + * Copyright (c) 2018 Mobiveil Inc.
> + * Author: Subrahmanya Lingappa <l.subrahmanya@...iveil.co.in>
> + * Refactor: Zhiqiang Hou <Zhiqiang.Hou@....com>
> + */
> +
> +#ifndef _PCIE_MOBIVEIL_H
> +#define _PCIE_MOBIVEIL_H
> +
> +#include <linux/pci.h>
> +#include <linux/irq.h>
> +#include <linux/msi.h>
> +#include "../../pci.h"
> +
> +/* register offsets and bit positions */
> +
> +/*
> + * 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_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 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_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_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 WIN_TYPE_MASK 0x3
> +#define WIN_SIZE_SHIFT 10
> +#define WIN_SIZE_MASK 0x3fffff
> +
> +#define PAB_EXT_AXI_AMAP_SIZE(win) PAB_EXT_REG_ADDR(0xbaf0, win)
> +
> +#define PAB_EXT_AXI_AMAP_AXI_WIN(win) PAB_EXT_REG_ADDR(0x80a0, win)
> +#define PAB_AXI_AMAP_AXI_WIN(win) PAB_REG_ADDR(0x0ba4, win)
> +#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_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 AMAP_CTRL_TYPE_MASK 3
> +
> +#define PAB_EXT_PEX_AMAP_SIZEN(win) PAB_EXT_REG_ADDR(0xbef0, win)
> +#define PAB_EXT_PEX_AMAP_AXI_WIN(win) PAB_EXT_REG_ADDR(0xb4a0, win)
> +#define PAB_PEX_AMAP_AXI_WIN(win) PAB_REG_ADDR(0x4ba4, win)
> +#define PAB_PEX_AMAP_PEX_WIN_L(win) PAB_REG_ADDR(0x4ba8, win)
> +#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
> +
> +/* supported number of MSI interrupts */
> +#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
> +
> +/* 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
> +
> +/* 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 PAGED_ADDR_BNDRY 0xc00
> +#define OFFSET_TO_PAGE_ADDR(off) \
> + ((off & PAGE_LO_MASK) | PAGED_ADDR_BNDRY)
> +#define OFFSET_TO_PAGE_IDX(off) \
> + ((off >> PAGE_SEL_OFFSET_SHIFT) & PAGE_SEL_MASK)
> +
> +struct mobiveil_pcie;
> +
> +struct mobiveil_msi { /* MSI information */
> + struct mutex lock; /* protect bitmap variable */
> + struct irq_domain *msi_domain;
> + struct irq_domain *dev_domain;
> + phys_addr_t msi_pages_phys;
> + int num_of_vectors;
> + DECLARE_BITMAP(msi_irq_in_use, PCI_NUM_MSI);
> +};
> +
> +struct mobiveil_rp_ops {
> + int (*interrupt_init)(struct mobiveil_pcie *pcie);
> +};
> +
> +struct root_port {
> + u8 root_bus_nr;
> + void __iomem *config_axi_slave_base; /* endpoint config base */
> + struct resource *ob_io_res;
> + struct mobiveil_rp_ops *ops;
> + int irq;
> + raw_spinlock_t intx_mask_lock;
> + struct irq_domain *intx_domain;
> + struct mobiveil_msi msi;
> +};
> +
> +struct mobiveil_pab_ops {
> + int (*link_up)(struct mobiveil_pcie *pcie);
> +};
> +
> +struct mobiveil_pcie {
> + struct platform_device *pdev;
> + struct list_head resources;
> + void __iomem *csr_axi_slave_base; /* PAB registers base */
> + phys_addr_t pcie_reg_base; /* Physical PCIe Controller Base */
> + void __iomem *apb_csr_base; /* MSI register base */
> + u32 apio_wins;
> + u32 ppio_wins;
> + u32 ob_wins_configured; /* configured outbound windows */
> + u32 ib_wins_configured; /* configured inbound windows */
> + const struct mobiveil_pab_ops *ops;
> + struct root_port rp;
> +};
> +
> +int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie);
> +bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie);
> +int mobiveil_bringup_link(struct mobiveil_pcie *pcie);
> +void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
> + u64 pci_addr, u32 type, u64 size);
> +void program_ib_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
> + u64 pci_addr, u32 type, u64 size);
> +u32 csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size);
> +void csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off, size_t size);
> +
> +static inline u32 csr_readl(struct mobiveil_pcie *pcie, u32 off)
> +{
> + return csr_read(pcie, off, 0x4);
> +}
> +
> +static inline void csr_writel(struct mobiveil_pcie *pcie, u32 val, u32 off)
> +{
> + csr_write(pcie, val, off, 0x4);
> +}
> +
> +#endif /* _PCIE_MOBIVEIL_H */
> --
> 2.17.1
>
Reviewed-by: Subrahmanya Lingappa <l.subrahmanya@...iveil.co.in>
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