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Message-ID: <CAFZiPx3FpSskuK3XykMXNqMk301+LOgNdJZ-9trMhDmXDXsmiQ@mail.gmail.com>
Date: Fri, 8 Mar 2019 12:14:33 +0530
From: Subrahmanya Lingappa <l.subrahmanya@...iveil.co.in>
To: Xiaowei Bao <xiaowei.bao@....com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>,
"Z.q. Hou" <Zhiqiang.Hou@....com>, robh+dt@...nel.org,
mark.rutland@....com, shawnguo@...nel.org,
Leo Li <leoyang.li@....com>, kishon@...com,
Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
gregkh@...uxfoundation.org, arnd@...db.de,
"M.h. Lian" <Minghuan.Lian@....com>, linux-pci@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] PCI: mobiveil: Add the EP mode support
Xiaowei,
On Mon, Feb 18, 2019 at 3:22 PM Xiaowei Bao <xiaowei.bao@....com> wrote:
>
> Add the EP mode support for Mobiveil base on endpoint framework.
>
> Signed-off-by: Xiaowei Bao <xiaowei.bao@....com>
> ---
> depends on: http://patchwork.ozlabs.org/project/linux-pci/list/?series=88754
>
> drivers/pci/controller/mobiveil/Kconfig | 5 +
> drivers/pci/controller/mobiveil/Makefile | 1 +
> drivers/pci/controller/mobiveil/pcie-mobiveil-ep.c | 527 ++++++++++++++++++++
> drivers/pci/controller/mobiveil/pcie-mobiveil.c | 100 ++++-
> drivers/pci/controller/mobiveil/pcie-mobiveil.h | 64 +++
> 5 files changed, 691 insertions(+), 6 deletions(-)
> create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil-ep.c
>
> diff --git a/drivers/pci/controller/mobiveil/Kconfig b/drivers/pci/controller/mobiveil/Kconfig
> index 3ddb7d6..c037db6 100644
> --- a/drivers/pci/controller/mobiveil/Kconfig
> +++ b/drivers/pci/controller/mobiveil/Kconfig
> @@ -11,6 +11,11 @@ config PCIE_MOBIVEIL_HOST
> depends on PCI_MSI_IRQ_DOMAIN
> select PCIE_MOBIVEIL
>
> +config PCIE_MOBIVEIL_EP
> + bool
> + depends on PCI_ENDPOINT
> + select PCIE_MOBIVEIL
> +
> config PCIE_MOBIVEIL_PLAT
> bool "Mobiveil AXI PCIe controller"
> depends on ARCH_ZYNQMP || COMPILE_TEST
> diff --git a/drivers/pci/controller/mobiveil/Makefile b/drivers/pci/controller/mobiveil/Makefile
> index ff66774..4f520b7 100644
> --- a/drivers/pci/controller/mobiveil/Makefile
> +++ b/drivers/pci/controller/mobiveil/Makefile
> @@ -1,5 +1,6 @@
> # SPDX-License-Identifier: GPL-2.0
> obj-$(CONFIG_PCIE_MOBIVEIL) += pcie-mobiveil.o
> obj-$(CONFIG_PCIE_MOBIVEIL_HOST) += pcie-mobiveil-host.o
> +obj-$(CONFIG_PCIE_MOBIVEIL_EP) += pcie-mobiveil-ep.o
> obj-$(CONFIG_PCIE_MOBIVEIL_PLAT) += pcie-mobiveil-plat.o
> obj-$(CONFIG_PCI_LAYERSCAPE_GEN4) += pci-layerscape-gen4.o
> diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-ep.c b/drivers/pci/controller/mobiveil/pcie-mobiveil-ep.c
> new file mode 100644
> index 0000000..16ca7fb
> --- /dev/null
> +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-ep.c
> @@ -0,0 +1,527 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/**
> + * Mobiveil PCIe Endpoint controller driver
> + *
> + * Copyright (C) 2018 NXP Semiconductor.
> + * Author: Xiaowei Bao <xiaowei.bao@....com>
> + */
> +
> +#include <linux/of.h>
> +#include <linux/pci-epc.h>
> +#include <linux/pci-epf.h>
> +#include <linux/platform_device.h>
> +#include "pcie-mobiveil.h"
> +
> +void mobiveil_pcie_ep_linkup(struct mobiveil_pcie_ep *ep)
> +{
> + struct pci_epc *epc = ep->epc;
> +
> + pci_epc_linkup(epc);
> +}
> +
> +static void __mobiveil_pcie_ep_reset_bar(struct mobiveil_pcie *pcie,
> + enum pci_barno bar)
> +{
> + csr_writel(pcie, bar, GPEX_BAR_SELECT);
> + csr_writel(pcie, 0, GPEX_BAR_SIZE_LDW);
> + csr_writel(pcie, 0, GPEX_BAR_SIZE_UDW);
> +}
> +
> +void mobiveil_pcie_ep_reset_bar(struct mobiveil_pcie *pcie,
> + enum pci_barno bar)
> +{
> + __mobiveil_pcie_ep_reset_bar(pcie, bar);
> +}
> +
> +static u8 __mobiveil_pcie_ep_find_next_cap(struct mobiveil_pcie *pcie,
> + u8 cap_ptr, u8 cap)
> +{
> + u8 cap_id, next_cap_ptr;
> + u16 reg;
> +
> + reg = csr_readw(pcie, cap_ptr);
> + next_cap_ptr = (reg & 0xff00) >> 8;
> + cap_id = (reg & 0x00ff);
> +
> + if (cap_id == cap)
> + return cap_ptr;
> +
> + if (!next_cap_ptr || cap_id > PCI_CAP_ID_MAX)
> + return 0;
> +
> + return __mobiveil_pcie_ep_find_next_cap(pcie, next_cap_ptr, cap);
> +}
> +
> +static u8 mobiveil_pcie_ep_find_capability(struct mobiveil_pcie *pcie,
> + u8 cap)
> +{
> + u8 next_cap_ptr;
> + u16 reg;
> +
> + reg = csr_readw(pcie, PCI_CAPABILITY_LIST);
> + next_cap_ptr = (reg & 0x00ff);
> +
> + if (!next_cap_ptr)
> + return 0;
> +
> + return __mobiveil_pcie_ep_find_next_cap(pcie, next_cap_ptr, cap);
> +}
> +
> +static int mobiveil_pcie_ep_write_header(struct pci_epc *epc, u8 func_no,
> + struct pci_epf_header *hdr)
> +{
> + struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
> + struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
> +
> + csr_writew(pcie, hdr->vendorid, PCI_VENDOR_ID);
> + csr_writew(pcie, hdr->deviceid, PCI_DEVICE_ID);
> + csr_writeb(pcie, hdr->revid, PCI_REVISION_ID);
> + csr_writeb(pcie, hdr->progif_code, PCI_CLASS_PROG);
> + csr_writew(pcie, hdr->subclass_code | hdr->baseclass_code << 8,
> + PCI_CLASS_DEVICE);
> + csr_writeb(pcie, hdr->cache_line_size, PCI_CACHE_LINE_SIZE);
> + csr_writew(pcie, hdr->subsys_vendor_id, PCI_SUBSYSTEM_VENDOR_ID);
> + csr_writew(pcie, hdr->subsys_id, PCI_SUBSYSTEM_ID);
> + csr_writeb(pcie, hdr->interrupt_pin, PCI_INTERRUPT_PIN);
> +
> + return 0;
> +}
> +
> +static int mobiveil_pcie_ep_inbound_atu(struct mobiveil_pcie_ep *ep,
> + u8 func_no, enum pci_barno bar,
> + dma_addr_t cpu_addr)
> +{
> + struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
> +
> + program_ib_windows_ep(pcie, func_no, bar, cpu_addr);
> +
> + return 0;
> +}
> +
> +static int mobiveil_pcie_ep_outbound_atu(struct mobiveil_pcie_ep *ep,
> + phys_addr_t phys_addr,
> + u64 pci_addr, u8 func_no,
> + size_t size)
> +{
> + int ret;
> + u32 free_win;
> + struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
> +
> + free_win = find_first_zero_bit(ep->ob_window_map, ep->num_ob_windows);
> + if (free_win >= ep->num_ob_windows) {
> + dev_err(&pcie->pdev->dev, "No free outbound window\n");
> + return -EINVAL;
> + }
> +
> + ret = program_ob_windows_ep(pcie, free_win, MEM_WINDOW_TYPE,
> + phys_addr, pci_addr, func_no, size);
> + if (ret < 0) {
> + dev_err(&pcie->pdev->dev, "Failed to program IB window\n");
> + return ret;
> + }
> +
> + set_bit(free_win, ep->ob_window_map);
> + ep->outbound_addr[free_win] = phys_addr;
> +
> + return 0;
> +}
> +
> +static void mobiveil_pcie_ep_clear_bar(struct pci_epc *epc, u8 func_no,
> + struct pci_epf_bar *epf_bar)
> +{
> + struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
> + struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
> + enum pci_barno bar = epf_bar->barno;
> +
> + if (bar < ep->bar_num) {
> + __mobiveil_pcie_ep_reset_bar(pcie,
> + func_no * ep->bar_num + bar);
> +
> + mobiveil_pcie_disable_ib_win_ep(pcie, func_no, bar);
> + }
> +}
> +
> +static int mobiveil_pcie_ep_set_bar(struct pci_epc *epc, u8 func_no,
> + struct pci_epf_bar *epf_bar)
> +{
> + int ret;
> + struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
> + struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
> + enum pci_barno bar = epf_bar->barno;
> + size_t size = epf_bar->size;
> +
> + if (bar < ep->bar_num) {
> + ret = mobiveil_pcie_ep_inbound_atu(ep, func_no, bar,
> + epf_bar->phys_addr);
> + if (ret)
> + return ret;
> +
> + csr_writel(pcie, func_no * ep->bar_num + bar,
> + GPEX_BAR_SELECT);
> + csr_writel(pcie, lower_32_bits(~(size - 1)),
> + GPEX_BAR_SIZE_LDW);
> + csr_writel(pcie, upper_32_bits(~(size - 1)),
> + GPEX_BAR_SIZE_UDW);
> + }
> +
> + return 0;
> +}
> +
> +static int mobiveil_pcie_find_index(struct mobiveil_pcie_ep *ep,
> + phys_addr_t addr,
> + u32 *atu_index)
> +{
> + u32 index;
> +
> + for (index = 0; index < ep->num_ob_windows; index++) {
> + if (ep->outbound_addr[index] != addr)
> + continue;
> + *atu_index = index;
> + return 0;
> + }
> +
> + return -EINVAL;
> +}
> +
> +static void mobiveil_pcie_ep_unmap_addr(struct pci_epc *epc, u8 func_no,
> + phys_addr_t addr)
> +{
> + int ret;
> + u32 atu_index;
> + struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
> + struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
> +
> + ret = mobiveil_pcie_find_index(ep, addr, &atu_index);
> + if (ret < 0)
> + return;
> +
> + mobiveil_pcie_disable_ob_win(pcie, atu_index);
> + clear_bit(atu_index, ep->ob_window_map);
> +}
> +
> +static int mobiveil_pcie_ep_map_addr(struct pci_epc *epc, u8 func_no,
> + phys_addr_t addr,
> + u64 pci_addr, size_t size)
> +{
> + int ret;
> + struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
> + struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
> +
> + ret = mobiveil_pcie_ep_outbound_atu(ep, addr, pci_addr, func_no, size);
> + if (ret) {
> + dev_err(&pcie->pdev->dev, "Failed to enable address\n");
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int mobiveil_pcie_ep_get_msi(struct pci_epc *epc, u8 func_no)
> +{
> + struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
> + struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
> + u32 val, reg;
> +
> + if (!ep->msi_cap)
> + return -EINVAL;
> +
> + reg = ep->msi_cap + PCI_MSI_FLAGS;
> + val = csr_readw(pcie, reg);
> + if (!(val & PCI_MSI_FLAGS_ENABLE))
> + return -EINVAL;
> +
> + val = (val & PCI_MSI_FLAGS_QSIZE) >> 4;
> +
> + return val;
> +}
> +
> +static int mobiveil_pcie_ep_set_msi(struct pci_epc *epc,
> + u8 func_no, u8 interrupts)
> +{
> + struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
> + struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
> + u32 val, reg;
> +
> + if (!ep->msi_cap)
> + return -EINVAL;
> +
> + reg = ep->msi_cap + PCI_MSI_FLAGS;
> + val = csr_readw(pcie, reg);
> + val &= ~PCI_MSI_FLAGS_QMASK;
> + val |= (interrupts << 1) & PCI_MSI_FLAGS_QMASK;
> + csr_writew(pcie, val, reg);
> +
> + return 0;
> +}
> +
> +static int mobiveil_pcie_ep_get_msix(struct pci_epc *epc, u8 func_no)
> +{
> + struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
> + struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
> + u32 val, reg;
> +
> + if (!ep->msix_cap)
> + return -EINVAL;
> +
> + reg = ep->msix_cap + PCI_MSIX_FLAGS;
> + val = csr_readw(pcie, reg);
> + if (!(val & PCI_MSIX_FLAGS_ENABLE))
> + return -EINVAL;
> +
> + val &= PCI_MSIX_FLAGS_QSIZE;
> +
> + return val;
> +}
> +
> +static int mobiveil_pcie_ep_set_msix(struct pci_epc *epc, u8 func_no,
> + u16 interrupts)
> +{
> + struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
> + struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
> + u32 val, reg;
> +
> + if (!ep->msix_cap)
> + return -EINVAL;
> +
> + reg = ep->msix_cap + PCI_MSIX_FLAGS;
> + val = csr_readw(pcie, reg);
> + val &= ~PCI_MSIX_FLAGS_QSIZE;
> + val |= interrupts;
> + csr_writew(pcie, val, reg);
> +
> + return 0;
> +}
> +
> +static int mobiveil_pcie_ep_raise_irq(struct pci_epc *epc, u8 func_no,
> + enum pci_epc_irq_type type,
> + u16 interrupt_num)
> +{
> + struct mobiveil_pcie_ep *ep = epc_get_drvdata(epc);
> +
> + if (!ep->ops->raise_irq)
> + return -EINVAL;
> +
> + return ep->ops->raise_irq(ep, func_no, type, interrupt_num);
> +}
> +
> +static const struct pci_epc_ops epc_ops = {
> + .write_header = mobiveil_pcie_ep_write_header,
> + .set_bar = mobiveil_pcie_ep_set_bar,
> + .clear_bar = mobiveil_pcie_ep_clear_bar,
> + .map_addr = mobiveil_pcie_ep_map_addr,
> + .unmap_addr = mobiveil_pcie_ep_unmap_addr,
> + .set_msi = mobiveil_pcie_ep_set_msi,
> + .get_msi = mobiveil_pcie_ep_get_msi,
> + .set_msix = mobiveil_pcie_ep_set_msix,
> + .get_msix = mobiveil_pcie_ep_get_msix,
> + .raise_irq = mobiveil_pcie_ep_raise_irq,
> +};
> +
> +int mobiveil_pcie_ep_raise_legacy_irq(struct mobiveil_pcie_ep *ep, u8 func_no)
> +{
> + struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
> +
> + dev_err(&pcie->pdev->dev, "EP cannot trigger legacy IRQs\n");
> +
> + return -EINVAL;
> +}
> +
> +int mobiveil_pcie_ep_raise_msi_irq(struct mobiveil_pcie_ep *ep, u8 func_no,
> + u8 interrupt_num)
> +{
> + struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
> + struct pci_epc *epc = ep->epc;
> + u16 msg_ctrl, msg_data;
> + u32 msg_addr_lower, msg_addr_upper, reg;
> + u64 msg_addr;
> + u32 func_num;
> + bool has_upper;
> + int ret;
> +
> + if (!ep->msi_cap)
> + return -EINVAL;
> +
> + /*
> + * In order ot get the PF's MSI capability register value from config
> + * space we need to set the PF number to the PAB_CTRL register.
> + */
> + func_num = csr_readl(pcie, PAB_CTRL);
> + func_num &= ~(FUNC_SEL_MASK << FUNC_SEL_SHIFT);
> + func_num |= (func_no & FUNC_SEL_MASK) << FUNC_SEL_SHIFT;
> + csr_writel(pcie, func_num, PAB_CTRL);
> +
> + reg = ep->msi_cap + PCI_MSI_FLAGS;
> + msg_ctrl = csr_readw(pcie, reg);
> + has_upper = !!(msg_ctrl & PCI_MSI_FLAGS_64BIT);
> + reg = ep->msi_cap + PCI_MSI_ADDRESS_LO;
> + msg_addr_lower = csr_readl(pcie, reg);
> + if (has_upper) {
> + reg = ep->msi_cap + PCI_MSI_ADDRESS_HI;
> + msg_addr_upper = csr_readl(pcie, reg);
> + reg = ep->msi_cap + PCI_MSI_DATA_64;
> + msg_data = csr_readw(pcie, reg);
> + } else {
> + msg_addr_upper = 0;
> + reg = ep->msi_cap + PCI_MSI_DATA_32;
> + msg_data = csr_readw(pcie, reg);
> + }
> + msg_addr = ((u64) msg_addr_upper) << 32 | msg_addr_lower;
> +
> + /*
> + * clear the FUNC_SEL_SHIFT bits when access other registers except
> + * config space register.
> + */
> + func_num = csr_readl(pcie, PAB_CTRL);
> + func_num &= ~(FUNC_SEL_MASK << FUNC_SEL_SHIFT);
> + csr_writel(pcie, func_num, PAB_CTRL);
> +
> + ret = mobiveil_pcie_ep_map_addr(epc, func_no, ep->msi_mem_phys,
> + msg_addr, epc->mem->page_size);
> + if (ret)
> + return ret;
> +
> + writel(msg_data | (interrupt_num - 1), ep->msi_mem);
> +
> + mobiveil_pcie_ep_unmap_addr(epc, func_no, ep->msi_mem_phys);
> +
> + return 0;
> +}
> +
> +int mobiveil_pcie_ep_raise_msix_irq(struct mobiveil_pcie_ep *ep, u8 func_no,
> + u16 interrupt_num)
> +{
> + struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
> + struct pci_epc *epc = ep->epc;
> + u32 msg_addr_upper, msg_addr_lower;
> + u32 msg_data;
> + u64 msg_addr;
> + u32 func_num;
> + int ret;
> +
> + /*
> + * In order ot get the PF's MSI capability register value from config
> + * space we need to set the PF number to the PAB_CTRL register.
> + */
> + func_num = csr_readl(pcie, PAB_CTRL);
> + func_num &= ~(FUNC_SEL_MASK << FUNC_SEL_SHIFT);
> + func_num |= (func_no & FUNC_SEL_MASK) << FUNC_SEL_SHIFT;
> + csr_writel(pcie, func_num, PAB_CTRL);
> +
> + msg_addr_lower = csr_readl(pcie, PAB_MSIX_TABLE_PBA_ACCESS +
> + PCI_MSIX_ENTRY_LOWER_ADDR +
> + (interrupt_num - 1) * PCI_MSIX_ENTRY_SIZE);
> + msg_addr_upper = csr_readl(pcie, PAB_MSIX_TABLE_PBA_ACCESS +
> + PCI_MSIX_ENTRY_UPPER_ADDR +
> + (interrupt_num - 1) * PCI_MSIX_ENTRY_SIZE);
> + msg_addr = ((u64) msg_addr_upper) << 32 | msg_addr_lower;
> + msg_data = csr_readl(pcie, PAB_MSIX_TABLE_PBA_ACCESS +
> + PCI_MSIX_ENTRY_DATA +
> + (interrupt_num - 1) * PCI_MSIX_ENTRY_SIZE);
> +
> + /*
> + * clear the FUNC_SEL_SHIFT bits when access other registers except
> + * config space registers.
> + */
> + func_num = csr_readl(pcie, PAB_CTRL);
> + func_num &= ~(FUNC_SEL_MASK << FUNC_SEL_SHIFT);
> + csr_writel(pcie, func_num, PAB_CTRL);
> +
> + ret = mobiveil_pcie_ep_map_addr(epc, func_no, ep->msi_mem_phys,
> + msg_addr, epc->mem->page_size);
> + if (ret)
> + return ret;
> +
> + writel(msg_data, ep->msi_mem);
> +
> + mobiveil_pcie_ep_unmap_addr(epc, func_no, ep->msi_mem_phys);
> +
> + return 0;
> +}
> +
> +void mobiveil_pcie_ep_exit(struct mobiveil_pcie_ep *ep)
> +{
> + struct pci_epc *epc = ep->epc;
> +
> + pci_epc_mem_free_addr(epc, ep->msi_mem_phys, ep->msi_mem,
> + epc->mem->page_size);
> +
> + pci_epc_mem_exit(epc);
> +}
> +
> +int mobiveil_pcie_ep_init(struct mobiveil_pcie_ep *ep)
> +{
> + int ret;
> + void *addr;
> + struct pci_epc *epc;
> + struct mobiveil_pcie *pcie = to_mobiveil_pcie_from_ep(ep);
> + struct device *dev = &pcie->pdev->dev;
> + struct device_node *np = dev->of_node;
> +
> + if (!pcie->csr_axi_slave_base) {
> + dev_err(dev, "csr_base is not populated\n");
> + return -EINVAL;
> + }
> +
> + ret = of_property_read_u32(np, "num-ob-windows", &ep->num_ob_windows);
> + if (ret < 0) {
> + dev_err(dev, "Unable to read *num-ob-windows* property\n");
> + return ret;
> + }
> +
> + if (ep->num_ob_windows > MAX_IATU_OUT) {
> + dev_err(dev, "Invalid *num-ob-windows*\n");
> + return -EINVAL;
> + }
> + ep->ob_window_map = devm_kcalloc(dev,
> + BITS_TO_LONGS(ep->num_ob_windows),
> + sizeof(long),
> + GFP_KERNEL);
> + if (!ep->ob_window_map)
> + return -ENOMEM;
> +
> + addr = devm_kcalloc(dev, ep->num_ob_windows, sizeof(phys_addr_t),
> + GFP_KERNEL);
> + if (!addr)
> + return -ENOMEM;
> + ep->outbound_addr = addr;
> +
> + mobiveil_pcie_enable_bridge_pio(pcie);
> + mobiveil_pcie_enable_engine_apio(pcie);
> + mobiveil_pcie_enable_engine_ppio(pcie);
> + mobiveil_pcie_enable_msi_ep(pcie);
> +
> + epc = devm_pci_epc_create(dev, &epc_ops);
> + if (IS_ERR(epc)) {
> + dev_err(dev, "Failed to create epc device\n");
> + return PTR_ERR(epc);
> + }
> +
> + ep->epc = epc;
> + epc_set_drvdata(epc, ep);
> +
> + ep->msi_cap = mobiveil_pcie_ep_find_capability(pcie, PCI_CAP_ID_MSI);
> +
> + ep->msix_cap = mobiveil_pcie_ep_find_capability(pcie,
> + PCI_CAP_ID_MSIX);
> +
> + if (ep->ops->ep_init)
> + ep->ops->ep_init(ep);
> +
> + epc->max_functions = ep->pf_num;
> +
> + ret = __pci_epc_mem_init(epc, ep->phys_base, ep->addr_size,
> + ep->page_size);
> + if (ret < 0) {
> + dev_err(dev, "Failed to initialize address space\n");
> + return ret;
> + }
> +
> + ep->msi_mem = pci_epc_mem_alloc_addr(epc, &ep->msi_mem_phys,
> + epc->mem->page_size);
> + if (!ep->msi_mem) {
> + dev_err(dev, "Failed to reserve memory for MSI/MSI-X\n");
> + return -ENOMEM;
> + }
> +
> + return 0;
> +}
> diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.c b/drivers/pci/controller/mobiveil/pcie-mobiveil.c
> index 49d471b..d1fdfed 100644
> --- a/drivers/pci/controller/mobiveil/pcie-mobiveil.c
> +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.c
> @@ -210,6 +210,57 @@ void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
> pcie->ob_wins_configured++;
> }
>
> +int program_ob_windows_ep(struct mobiveil_pcie *pcie, int win_num, int type,
> + u64 phys, u64 bus_addr, u8 func, u64 size)
> +{
> + u32 val;
> + u32 size_h, size_l;
> +
> + if (size & (size - 1))
> + size = 1 << (1 + ilog2(size));
> +
> + size_h = upper_32_bits(~(size - 1));
> + size_l = lower_32_bits(~(size - 1));
> +
> + val = csr_readl(pcie, PAB_AXI_AMAP_CTRL(win_num));
> + val &= ~(WIN_TYPE_MASK << WIN_TYPE_SHIFT |
> + WIN_SIZE_MASK << WIN_SIZE_SHIFT);
> + val |= 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT |
> + (size_l & (WIN_SIZE_MASK << WIN_SIZE_SHIFT));
> + csr_writel(pcie, val, PAB_AXI_AMAP_CTRL(win_num));
> +
> + csr_writel(pcie, func, PAB_AXI_AMAP_PCI_HDR_PARAM(win_num));
> + csr_writel(pcie, lower_32_bits(phys), PAB_AXI_AMAP_AXI_WIN(win_num));
> + csr_writel(pcie, upper_32_bits(phys),
> + PAB_EXT_AXI_AMAP_AXI_WIN(win_num));
> + csr_writel(pcie, lower_32_bits(bus_addr),
> + PAB_AXI_AMAP_PEX_WIN_L(win_num));
> + csr_writel(pcie, upper_32_bits(bus_addr),
> + PAB_AXI_AMAP_PEX_WIN_H(win_num));
> + csr_writel(pcie, size_h, PAB_EXT_AXI_AMAP_SIZE(win_num));
> +
> + return 0;
> +}
> +
> +void program_ib_windows_ep(struct mobiveil_pcie *pcie, u8 func_no,
> + int bar, u64 phys)
> +{
> + csr_writel(pcie, upper_32_bits(phys),
> + PAB_EXT_PEX_BAR_AMAP(func_no, bar));
> + csr_writel(pcie, lower_32_bits(phys) | PEX_BAR_AMAP_EN,
> + PAB_PEX_BAR_AMAP(func_no, bar));
> +}
> +
> +void mobiveil_pcie_disable_ib_win_ep(struct mobiveil_pcie *pcie,
> + u8 func_no, u8 bar)
> +{
> + u32 val;
> +
> + val = csr_readl(pcie, PAB_PEX_BAR_AMAP(func_no, bar));
> + val &= ~(1 << 0);
> + csr_writel(pcie, val, PAB_PEX_BAR_AMAP(func_no, bar));
> +}
> +
> int mobiveil_bringup_link(struct mobiveil_pcie *pcie)
> {
> int retries;
> @@ -227,20 +278,57 @@ int mobiveil_bringup_link(struct mobiveil_pcie *pcie)
> return -ETIMEDOUT;
> }
>
> -void mobiveil_pcie_disable_ib_win(struct mobiveil_pcie *pci, int win_num)
> +void mobiveil_pcie_disable_ib_win(struct mobiveil_pcie *pcie, int win_num)
> {
> u32 val;
>
> - val = csr_readl(pci, PAB_PEX_AMAP_CTRL(win_num));
> + val = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num));
> val &= ~(1 << AMAP_CTRL_EN_SHIFT);
> - csr_writel(pci, val, PAB_PEX_AMAP_CTRL(win_num));
> + csr_writel(pcie, val, PAB_PEX_AMAP_CTRL(win_num));
> }
>
> -void mobiveil_pcie_disable_ob_win(struct mobiveil_pcie *pci, int win_num)
> +void mobiveil_pcie_disable_ob_win(struct mobiveil_pcie *pcie, int win_num)
> {
> u32 val;
>
> - val = csr_readl(pci, PAB_AXI_AMAP_CTRL(win_num));
> + val = csr_readl(pcie, PAB_AXI_AMAP_CTRL(win_num));
> val &= ~(1 << WIN_ENABLE_SHIFT);
> - csr_writel(pci, val, PAB_AXI_AMAP_CTRL(win_num));
> + csr_writel(pcie, val, PAB_AXI_AMAP_CTRL(win_num));
> +}
> +
> +void mobiveil_pcie_enable_bridge_pio(struct mobiveil_pcie *pcie)
> +{
> + u32 val;
> +
> + val = csr_readl(pcie, PAB_CTRL);
> + val |= 1 << AMBA_PIO_ENABLE_SHIFT;
> + val |= 1 << PEX_PIO_ENABLE_SHIFT;
> + csr_writel(pcie, val, PAB_CTRL);
> +}
> +
> +void mobiveil_pcie_enable_engine_apio(struct mobiveil_pcie *pcie)
> +{
> + u32 val;
> +
> + val = csr_readl(pcie, PAB_AXI_PIO_CTRL);
> + val |= APIO_EN_MASK;
> + csr_writel(pcie, val, PAB_AXI_PIO_CTRL);
> +}
> +
> +void mobiveil_pcie_enable_engine_ppio(struct mobiveil_pcie *pcie)
> +{
> + u32 val;
> +
> + val = csr_readl(pcie, PAB_PEX_PIO_CTRL);
> + val |= 1 << PIO_ENABLE_SHIFT;
> + csr_writel(pcie, val, PAB_PEX_PIO_CTRL);
> +}
> +
> +void mobiveil_pcie_enable_msi_ep(struct mobiveil_pcie *pcie)
> +{
> + u32 val;
> +
> + val = csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB);
> + val |= 1 << 0;
> + csr_writel(pcie, val, PAB_INTP_AMBA_MISC_ENB);
> }
> diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.h b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
> index f0e2e4a..275c68f 100644
> --- a/drivers/pci/controller/mobiveil/pcie-mobiveil.h
> +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
> @@ -15,6 +15,10 @@
> #include <linux/msi.h>
> #include "../../pci.h"
>
> +#include <linux/pci-epc.h>
> +#include <linux/pci-epf.h>
> +
> +#define MAX_IATU_OUT 256
> /* register offsets and bit positions */
>
> /*
> @@ -40,6 +44,9 @@
> #define PAGE_SEL_MASK 0x3f
> #define PAGE_LO_MASK 0x3ff
> #define PAGE_SEL_OFFSET_SHIFT 10
> +#define FUNC_SEL_SHIFT 19
> +#define FUNC_SEL_MASK 0x1ff
> +#define MSI_SW_CTRL_EN (1 << 29)
>
> #define PAB_ACTIVITY_STAT 0x81c
>
> @@ -100,6 +107,19 @@
> #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)
>
> +/* PPIO WINs EP mode */
> +#define PAB_PEX_BAR_AMAP(func, bar) (0x1ba0 + 0x20 * func + 4 * bar)
> +#define PAB_EXT_PEX_BAR_AMAP(func, bar) (0x84a0 + 0x20 * func + 4 * bar)
> +#define PEX_BAR_AMAP_EN (1 << 0)
> +
> +#define PAB_AXI_AMAP_PCI_HDR_PARAM(idx) (0x5ba0 + 0x04 * idx)
> +#define PAB_MSIX_TABLE_PBA_ACCESS 0xD000
> +
> +#define GPEX_BAR_ENABLE 0x4D4
> +#define GPEX_BAR_SIZE_LDW 0x4D8
> +#define GPEX_BAR_SIZE_UDW 0x4DC
> +#define GPEX_BAR_SELECT 0x4E0
> +
> /* starting offset of INTX bits in status register */
> #define PAB_INTX_START 5
>
> @@ -137,6 +157,7 @@
> ((off >> PAGE_SEL_OFFSET_SHIFT) & PAGE_SEL_MASK)
>
> struct mobiveil_pcie;
> +struct mobiveil_pcie_ep;
>
> struct mobiveil_msi { /* MSI information */
> struct mutex lock; /* protect bitmap variable */
> @@ -169,6 +190,29 @@ struct mobiveil_pab_ops {
> int (*host_init)(struct mobiveil_pcie *pcie);
> };
>
> +struct mobiveil_pcie_ep_ops {
> + void (*ep_init)(struct mobiveil_pcie_ep *ep);
> + int (*raise_irq)(struct mobiveil_pcie_ep *ep, u8 func_no,
> + enum pci_epc_irq_type type, u16 interrupt_num);
> +};
> +
> +struct mobiveil_pcie_ep {
> + struct pci_epc *epc;
> + struct mobiveil_pcie_ep_ops *ops;
> + phys_addr_t phys_base;
> + size_t addr_size;
> + size_t page_size;
> + phys_addr_t *outbound_addr;
> + unsigned long *ob_window_map;
> + u32 num_ob_windows;
> + void __iomem *msi_mem;
> + phys_addr_t msi_mem_phys;
> + u8 msi_cap; /* MSI capability offset */
> + u8 msix_cap; /* MSI-X capability offset */
> + u8 bar_num;
> + u32 pf_num;
> +};
> +
> struct mobiveil_pcie {
> struct platform_device *pdev;
> struct list_head *resources;
> @@ -181,7 +225,10 @@ struct mobiveil_pcie {
> u32 ib_wins_configured; /* configured inbound windows */
> const struct mobiveil_pab_ops *ops;
> struct root_port rp;
> + struct mobiveil_pcie_ep ep;
> };
> +#define to_mobiveil_pcie_from_ep(endpoint) \
> + container_of((endpoint), struct mobiveil_pcie, ep)
>
> int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie);
> int mobiveil_host_init(struct mobiveil_pcie *pcie, bool reinit);
> @@ -226,4 +273,21 @@ static inline void csr_writeb(struct mobiveil_pcie *pcie, u32 val, u32 off)
> csr_write(pcie, val, off, 0x1);
> }
>
> +void program_ib_windows_ep(struct mobiveil_pcie *pcie, u8 func_no,
> + int bar, u64 phys);
> +int program_ob_windows_ep(struct mobiveil_pcie *pcie, int win_num, int type,
> + u64 phys, u64 bus_addr, u8 func, u64 size);
> +void mobiveil_pcie_disable_ib_win_ep(struct mobiveil_pcie *pci,
> + u8 func_no, u8 bar);
> +int mobiveil_pcie_ep_init(struct mobiveil_pcie_ep *ep);
> +int mobiveil_pcie_ep_raise_legacy_irq(struct mobiveil_pcie_ep *ep, u8 func_no);
> +int mobiveil_pcie_ep_raise_msi_irq(struct mobiveil_pcie_ep *ep, u8 func_no,
> + u8 interrupt_num);
> +int mobiveil_pcie_ep_raise_msix_irq(struct mobiveil_pcie_ep *ep, u8 func_no,
> + u16 interrupt_num);
> +void mobiveil_pcie_ep_reset_bar(struct mobiveil_pcie *pci, enum pci_barno bar);
> +void mobiveil_pcie_enable_bridge_pio(struct mobiveil_pcie *pci);
> +void mobiveil_pcie_enable_engine_apio(struct mobiveil_pcie *pci);
> +void mobiveil_pcie_enable_engine_ppio(struct mobiveil_pcie *pci);
> +void mobiveil_pcie_enable_msi_ep(struct mobiveil_pcie *pci);
> #endif /* _PCIE_MOBIVEIL_H */
> --
> 1.7.1
>
Please review and fix macro alignments, otherwise looks ok.
Reviewed-by: Subrahmanya Lingappa <l.subrahmanya@...iveil.co.in>
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