RE: [PATCHv4 16/28] PCI: mobiveil: refactor Mobiveil PCIe Host Bridge IP driver

From: Z.q. Hou
Date: Fri Mar 29 2019 - 02:07:36 EST

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In reply to: Lorenzo Pieralisi: "Re: [PATCHv4 16/28] PCI: mobiveil: refactor Mobiveil PCIe Host Bridge IP driver"
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Hi Lorenzo,

Thanks a lot for your comments!

> -----Original Message-----
> From: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
> Sent: 2019年3月29日 0:09
> To: Z.q. Hou <zhiqiang.hou@xxxxxxx>
> Cc: linux-pci@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx;
> devicetree@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> bhelgaas@xxxxxxxxxx; robh+dt@xxxxxxxxxx; mark.rutland@xxxxxxx;
> l.subrahmanya@xxxxxxxxxxxxxx; shawnguo@xxxxxxxxxx; Leo Li
> <leoyang.li@xxxxxxx>; catalin.marinas@xxxxxxx; will.deacon@xxxxxxx;
> Mingkai Hu <mingkai.hu@xxxxxxx>; M.h. Lian <minghuan.lian@xxxxxxx>;
> Xiaowei Bao <xiaowei.bao@xxxxxxx>
> Subject: Re: [PATCHv4 16/28] PCI: mobiveil: refactor Mobiveil PCIe Host
> Bridge IP driver
>
> On Thu, Mar 28, 2019 at 02:09:55AM +0000, Z.q. Hou wrote:
>
> [...]
>
> > > > > On Mon, Mar 11, 2019 at 09:32:04AM +0000, Z.q. Hou wrote:
> > > > > > From: Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx>
> > > > > >
> > > > > > 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).
> > > > >
> > > > > I do not want to create a subdirectory for every controller that can
> work in
> > > > > RC&EP so drop this patch, more so given that it will be required "later",
> we
> > > > > will create a directory when and if we actually have to.
> > > >
> > > > Please don't drop this patch, Xiaowei Bao has sent v1 of the EP mode
> > > > driver, which is depends on this patch.
> > >
> > > I understand but he will have to rebase that code anyway, I do
> > > not want to create a directory for mobiveil before I see other
> > > IPs built on it, we did not do it for the cadence and rockchip
> > > controllers either. So you will have to drop this patch and
> > > rework it.
> >
> > It's different from cadence and rockchip cases, they only have 1
> > driver, so do not need to create a directory, while we have NXP's
> > LX2160 platform and Mobiveil's FPGA platform both use Mobiveil's GPEX
> > IP, so we already have 2 drivers, so I think it is reasonable to
> > collect into an new directory.
>
> Wrap your messages to 80 characters per line. OK, please follow
> Bjorn's guidelines when reposting and split the series as
> discussed.

OK, I will.

Thanks,
Zhiqiang

> Thanks,
> Lorenzo
>
> > Thanks,
> > Zhiqiang
> >
> > > Thanks,
> > > Lorenzo
> > >
> > > > > Thanks,
> > > > > Lorenzo
> > > > >
> > > > > > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx>
> > > > > > Reviewed-by: Minghuan Lian <Minghuan.Lian@xxxxxxx>
> > > > > > Reviewed-by: Subrahmanya Lingappa
> <l.subrahmanya@xxxxxxxxxxxxxx>
> > > > > > ---
> > > > > > V4:
> > > > > > - 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
> > > > > > 1e64279f338a..1013e74b14f2 100644
> > > > > > --- a/MAINTAINERS
> > > > > > +++ b/MAINTAINERS
> > > > > > @@ -11877,7 +11877,7 @@ M: Subrahmanya Lingappa
> > > > > <l.subrahmanya@xxxxxxxxxxxxxx>
> > > > > > L: linux-pci@xxxxxxxxxxxxxxx
> > > > > > 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@xxxxxxxxxxx>
> > > > > > 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@xxxxxxxxxxxxxx>
> > > > > > + * Refactor: Zhiqiang Hou <Zhiqiang.Hou@xxxxxxx>
> > > > > > */
> > > > > >
> > > > > > -#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@xxxxxxxxxxxxxx>");
> > > > > > 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@xxxxxxxxxxxxxx>
> > > > > > + * Refactor: Zhiqiang Hou <Zhiqiang.Hou@xxxxxxx>
> > > > > > + */
> > > > > > +
> > > > > > +#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@xxxxxxxxxxxxxx>");
> > > > > > 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@xxxxxxxxxxxxxx>
> > > > > > + * Refactor: Zhiqiang Hou <Zhiqiang.Hou@xxxxxxx>
> > > > > > + */
> > > > > > +
> > > > > > +#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@xxxxxxxxxxxxxx>
> > > > > > + * Refactor: Zhiqiang Hou <Zhiqiang.Hou@xxxxxxx>
> > > > > > + */
> > > > > > +
> > > > > > +#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
> > > > > >
> > > >
> > > > Thanks,
> > > > Zhiqiang

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