| Message ID | 20181120092615.11680-17-Zhiqiang.Hou@nxp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
| Series | PCI: refactor Mobiveil driver and add PCIe Gen4 driver for NXP Layerscape SoCs | expand |
reviewed-by: Minghuan Lian <Minghuan.Lian@nxp.com> > -----Original Message----- > From: Z.q. Hou > Sent: Tuesday, November 20, 2018 5:27 PM > To: linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org; > devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; > bhelgaas@google.com; robh+dt@kernel.org; mark.rutland@arm.com; > l.subrahmanya@mobiveil.co.in; shawnguo@kernel.org; Leo Li > <leoyang.li@nxp.com>; lorenzo.pieralisi@arm.com; > catalin.marinas@arm.com; will.deacon@arm.com > Cc: Mingkai Hu <mingkai.hu@nxp.com>; M.h. Lian > <minghuan.lian@nxp.com>; Xiaowei Bao <xiaowei.bao@nxp.com>; Z.q. Hou > <zhiqiang.hou@nxp.com> > Subject: [PATCHv2 16/25] PCI: mobiveil: refactor Mobiveil PCIe Host Bridge IP > driver > > From: Hou Zhiqiang <Zhiqiang.Hou@nxp.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@nxp.com> > --- > V2: > - Move interrupts enabling to interrupt init function and revert to > just enable INTX and MSI. > > 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 2d916afea75d..084d225583e0 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -11447,7 +11447,7 @@ M: Subrahmanya Lingappa > <l.subrahmanya@mobiveil.co.in> > L: linux-pci@vger.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@bootlin.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@mobiveil.co.in> > + * Refactor: Zhiqiang Hou <Zhiqiang.Hou@nxp.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@mobiveil.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@mobiveil.co.in> > + * Refactor: Zhiqiang Hou <Zhiqiang.Hou@nxp.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@mobiveil.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@mobiveil.co.in> > + * Refactor: Zhiqiang Hou <Zhiqiang.Hou@nxp.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@mobiveil.co.in> > + * Refactor: Zhiqiang Hou <Zhiqiang.Hou@nxp.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
diff --git a/MAINTAINERS b/MAINTAINERS index 2d916afea75d..084d225583e0 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11447,7 +11447,7 @@ M: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in> L: linux-pci@vger.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@bootlin.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@mobiveil.co.in> + * Refactor: Zhiqiang Hou <Zhiqiang.Hou@nxp.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@mobiveil.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@mobiveil.co.in> + * Refactor: Zhiqiang Hou <Zhiqiang.Hou@nxp.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@mobiveil.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@mobiveil.co.in> + * Refactor: Zhiqiang Hou <Zhiqiang.Hou@nxp.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@mobiveil.co.in> + * Refactor: Zhiqiang Hou <Zhiqiang.Hou@nxp.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 */