Re: [PATCH v2 08/22] PCI: dwc: designware: Add EP mode support

[Joao Pinto <Joao.Pinto@synopsys.com>]

=C0s 9:50 AM de 2/17/2017, Kishon Vijay Abraham I escreveu:
> Add endpoint mode support to designware driver. This uses the
> EP Core layer introduced recently to add endpoint mode support.
> *Any* function driver can now use this designware device
> in order to achieve the EP functionality.
> =

> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
> ---
>  drivers/pci/dwc/Kconfig              |    5 +
>  drivers/pci/dwc/Makefile             |    1 +
>  drivers/pci/dwc/pcie-designware-ep.c |  342 ++++++++++++++++++++++++++++=
++++++
>  drivers/pci/dwc/pcie-designware.c    |   51 +++++
>  drivers/pci/dwc/pcie-designware.h    |   72 +++++++
>  5 files changed, 471 insertions(+)
>  create mode 100644 drivers/pci/dwc/pcie-designware-ep.c
> =

> diff --git a/drivers/pci/dwc/Kconfig b/drivers/pci/dwc/Kconfig
> index dfb8a69..00335c7 100644
> --- a/drivers/pci/dwc/Kconfig
> +++ b/drivers/pci/dwc/Kconfig
> @@ -9,6 +9,11 @@ config PCIE_DW_HOST
>  	depends on PCI_MSI_IRQ_DOMAIN
>          select PCIE_DW
>  =

> +config PCIE_DW_EP
> +	bool
> +	depends on PCI_ENDPOINT
> +	select PCIE_DW
> +
>  config PCI_DRA7XX
>  	bool "TI DRA7xx PCIe controller"
>  	depends on PCI
> diff --git a/drivers/pci/dwc/Makefile b/drivers/pci/dwc/Makefile
> index a2df13c..b38425d 100644
> --- a/drivers/pci/dwc/Makefile
> +++ b/drivers/pci/dwc/Makefile
> @@ -1,5 +1,6 @@
>  obj-$(CONFIG_PCIE_DW) +=3D pcie-designware.o
>  obj-$(CONFIG_PCIE_DW_HOST) +=3D pcie-designware-host.o
> +obj-$(CONFIG_PCIE_DW_EP) +=3D pcie-designware-ep.o
>  obj-$(CONFIG_PCIE_DW_PLAT) +=3D pcie-designware-plat.o
>  obj-$(CONFIG_PCI_DRA7XX) +=3D pci-dra7xx.o
>  obj-$(CONFIG_PCI_EXYNOS) +=3D pci-exynos.o
> diff --git a/drivers/pci/dwc/pcie-designware-ep.c b/drivers/pci/dwc/pcie-=
designware-ep.c
> new file mode 100644
> index 0000000..e465c5e
> --- /dev/null
> +++ b/drivers/pci/dwc/pcie-designware-ep.c
> @@ -0,0 +1,342 @@
> +/**
> + * Synopsys Designware PCIe Endpoint controller driver
> + *
> + * Copyright (C) 2017 Texas Instruments
> + * Author: Kishon Vijay Abraham I <kishon@ti.com>
> + *
> + * This program is free software: you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 of
> + * the License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program.  If not, see <https://urldefense.proofpoint.=
com/v2/url?u=3Dhttp-3A__www.gnu.org_licenses_&d=3DDwIBAg&c=3DDPL6_X_6JkXFx7=
AXWqB0tg&r=3Ds2fO0hii0OGNOv9qQy_HRXy-xAJUD1NNoEcc3io_kx0&m=3DWif-q5OZ-YZwRC=
xX1bBAl5itP28aoQ8Fv7NmxvWSvyg&s=3DN2kaSPkx7uqpiP9O357WPoXruWEiOzF6AhCVChKmd=
xc&e=3D >.
> + */
> +
> +#include <linux/of.h>
> +
> +#include "pcie-designware.h"
> +#include <linux/pci-epc.h>
> +#include <linux/pci-epf.h>
> +
> +void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
> +{
> +	struct pci_epc *epc =3D ep->epc;
> +	struct pci_epf *epf;
> +
> +	list_for_each_entry(epf, &epc->pci_epf, list)
> +		pci_epf_linkup(epf);
> +}
> +
> +static void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
> +{
> +	u32 reg;
> +
> +	reg =3D PCI_BASE_ADDRESS_0 + (4 * bar);
> +	dw_pcie_write_dbi(pci, pci->dbi_base2, reg, 0x4, 0x0);
> +	dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x4, 0x0);
> +}
> +
> +static int dw_pcie_ep_write_header(struct pci_epc *epc,
> +				   struct pci_epf_header *hdr)
> +{
> +	struct dw_pcie_ep *ep =3D epc_get_drvdata(epc);
> +	struct dw_pcie *pci =3D to_dw_pcie_from_ep(ep);
> +	void __iomem *base =3D pci->dbi_base;
> +
> +	dw_pcie_write_dbi(pci, base, PCI_VENDOR_ID, 0x2, hdr->vendorid);
> +	dw_pcie_write_dbi(pci, base, PCI_DEVICE_ID, 0x2, hdr->deviceid);
> +	dw_pcie_write_dbi(pci, base, PCI_REVISION_ID, 0x1, hdr->revid);
> +	dw_pcie_write_dbi(pci, base, PCI_CLASS_PROG, 0x1, hdr->progif_code);
> +	dw_pcie_write_dbi(pci, base, PCI_CLASS_DEVICE, 0x2,
> +			  hdr->subclass_code | hdr->baseclass_code << 8);
> +	dw_pcie_write_dbi(pci, base, PCI_CACHE_LINE_SIZE, 0x1,
> +			  hdr->cache_line_size);
> +	dw_pcie_write_dbi(pci, base, PCI_SUBSYSTEM_VENDOR_ID, 0x2,
> +			  hdr->subsys_vendor_id);
> +	dw_pcie_write_dbi(pci, base, PCI_SUBSYSTEM_ID, 0x2, hdr->subsys_id);
> +	dw_pcie_write_dbi(pci, base, PCI_INTERRUPT_PIN, 0x1,
> +			  hdr->interrupt_pin);
> +
> +	return 0;
> +}
> +
> +static int dw_pcie_ep_inbound_atu(struct dw_pcie_ep *ep, enum pci_barno =
bar,
> +				  dma_addr_t cpu_addr,
> +				  enum dw_pcie_as_type as_type)
> +{
> +	int ret;
> +	u32 free_win;
> +	struct dw_pcie *pci =3D to_dw_pcie_from_ep(ep);
> +
> +	free_win =3D find_first_zero_bit(&ep->ib_window_map,
> +				       sizeof(ep->ib_window_map));
> +	if (free_win >=3D ep->num_ib_windows) {
> +		dev_err(pci->dev, "no free inbound window\n");
> +		return -EINVAL;
> +	}
> +
> +	ret =3D dw_pcie_prog_inbound_atu(pci, free_win, bar, cpu_addr,
> +				       as_type);
> +	if (ret < 0) {
> +		dev_err(pci->dev, "Failed to program IB window\n");
> +		return ret;
> +	}
> +
> +	ep->bar_to_atu[bar] =3D free_win;
> +	set_bit(free_win, &ep->ib_window_map);
> +
> +	return 0;
> +}
> +
> +static int dw_pcie_ep_outbound_atu(struct dw_pcie_ep *ep, phys_addr_t ph=
ys_addr,
> +				   u64 pci_addr, size_t size)
> +{
> +	u32 free_win;
> +	struct dw_pcie *pci =3D to_dw_pcie_from_ep(ep);
> +
> +	free_win =3D find_first_zero_bit(&ep->ob_window_map,
> +				       sizeof(ep->ob_window_map));
> +	if (free_win >=3D ep->num_ob_windows) {
> +		dev_err(pci->dev, "no free outbound window\n");
> +		return -EINVAL;
> +	}
> +
> +	dw_pcie_prog_outbound_atu(pci, free_win, PCIE_ATU_TYPE_MEM,
> +				  phys_addr, pci_addr, size);
> +
> +	set_bit(free_win, &ep->ob_window_map);
> +	ep->outbound_addr[free_win] =3D phys_addr;
> +
> +	return 0;
> +}
> +
> +static void dw_pcie_ep_clear_bar(struct pci_epc *epc, enum pci_barno bar)
> +{
> +	struct dw_pcie_ep *ep =3D epc_get_drvdata(epc);
> +	struct dw_pcie *pci =3D to_dw_pcie_from_ep(ep);
> +	u32 atu_index =3D ep->bar_to_atu[bar];
> +
> +	dw_pcie_ep_reset_bar(pci, bar);
> +
> +	dw_pcie_disable_atu(pci, atu_index, DW_PCIE_REGION_INBOUND);
> +	clear_bit(atu_index, &ep->ib_window_map);
> +}
> +
> +static int dw_pcie_ep_set_bar(struct pci_epc *epc, enum pci_barno bar,
> +			      dma_addr_t bar_phys, size_t size, int flags)
> +{
> +	int ret;
> +	struct dw_pcie_ep *ep =3D epc_get_drvdata(epc);
> +	struct dw_pcie *pci =3D to_dw_pcie_from_ep(ep);
> +	enum dw_pcie_as_type as_type;
> +	u32 reg =3D PCI_BASE_ADDRESS_0 + (4 * bar);
> +
> +	if (!(flags & PCI_BASE_ADDRESS_SPACE))
> +		as_type =3D DW_PCIE_AS_MEM;
> +	else
> +		as_type =3D DW_PCIE_AS_IO;
> +
> +	ret =3D dw_pcie_ep_inbound_atu(ep, bar, bar_phys, as_type);
> +	if (ret)
> +		return ret;
> +
> +	dw_pcie_write_dbi(pci, pci->dbi_base2, reg, 0x4, size - 1);
> +	dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x4, flags);
> +
> +	return 0;
> +}
> +
> +static int dw_pcie_find_index(struct dw_pcie_ep *ep, phys_addr_t addr,
> +			      u32 *atu_index)
> +{
> +	u32 index;
> +
> +	for (index =3D 0; index < ep->num_ob_windows; index++) {
> +		if (ep->outbound_addr[index] !=3D addr)
> +			continue;
> +		*atu_index =3D index;
> +		return 0;
> +	}
> +
> +	return -EINVAL;
> +}
> +
> +static void dw_pcie_ep_unmap_addr(struct pci_epc *epc, phys_addr_t addr)
> +{
> +	int ret;
> +	u32 atu_index;
> +	struct dw_pcie_ep *ep =3D epc_get_drvdata(epc);
> +	struct dw_pcie *pci =3D to_dw_pcie_from_ep(ep);
> +
> +	ret =3D dw_pcie_find_index(ep, addr, &atu_index);
> +	if (ret < 0)
> +		return;
> +
> +	dw_pcie_disable_atu(pci, atu_index, DW_PCIE_REGION_OUTBOUND);
> +	clear_bit(atu_index, &ep->ob_window_map);
> +}
> +
> +static int dw_pcie_ep_map_addr(struct pci_epc *epc, phys_addr_t addr,
> +			       u64 pci_addr, size_t size)
> +{
> +	int ret;
> +	struct dw_pcie_ep *ep =3D epc_get_drvdata(epc);
> +	struct dw_pcie *pci =3D to_dw_pcie_from_ep(ep);
> +
> +	ret =3D dw_pcie_ep_outbound_atu(ep, addr, pci_addr, size);
> +	if (ret) {
> +		dev_err(pci->dev, "failed to enable address\n");
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static int dw_pcie_ep_get_msi(struct pci_epc *epc)
> +{
> +	int val;
> +	u32 lower_addr;
> +	u32 upper_addr;
> +	struct dw_pcie_ep *ep =3D epc_get_drvdata(epc);
> +	struct dw_pcie *pci =3D to_dw_pcie_from_ep(ep);
> +
> +	val =3D dw_pcie_read_dbi(pci, pci->dbi_base, MSI_MESSAGE_CONTROL, 0x2);
> +	val =3D (val & MSI_CAP_MME_MASK) >> MSI_CAP_MME_SHIFT;
> +
> +	lower_addr =3D dw_pcie_read_dbi(pci, pci->dbi_base, MSI_MESSAGE_ADDR_L3=
2,
> +				      0x4);
> +	upper_addr =3D dw_pcie_read_dbi(pci, pci->dbi_base, MSI_MESSAGE_ADDR_U3=
2,
> +				      0x4);
> +
> +	if (!(lower_addr || upper_addr))
> +		return -EINVAL;
> +
> +	return val;
> +}
> +
> +static int dw_pcie_ep_set_msi(struct pci_epc *epc, u8 encode_int)
> +{
> +	int val;
> +	struct dw_pcie_ep *ep =3D epc_get_drvdata(epc);
> +	struct dw_pcie *pci =3D to_dw_pcie_from_ep(ep);
> +
> +	val =3D (encode_int << MSI_CAP_MMC_SHIFT);
> +	dw_pcie_write_dbi(pci, pci->dbi_base, MSI_MESSAGE_CONTROL, 0x2, val);
> +
> +	return 0;
> +}
> +
> +static int dw_pcie_ep_raise_irq(struct pci_epc *epc,
> +				enum pci_epc_irq_type type, u8 interrupt_num)
> +{
> +	struct dw_pcie_ep *ep =3D epc_get_drvdata(epc);
> +
> +	if (!ep->ops->raise_irq)
> +		return -EINVAL;
> +
> +	return ep->ops->raise_irq(ep, type, interrupt_num);
> +}
> +
> +static void dw_pcie_ep_stop(struct pci_epc *epc)
> +{
> +	struct dw_pcie_ep *ep =3D epc_get_drvdata(epc);
> +	struct dw_pcie *pci =3D to_dw_pcie_from_ep(ep);
> +
> +	if (!pci->ops->stop_link)
> +		return;
> +
> +	pci->ops->stop_link(pci);
> +}
> +
> +static int dw_pcie_ep_start(struct pci_epc *epc)
> +{
> +	struct dw_pcie_ep *ep =3D epc_get_drvdata(epc);
> +	struct dw_pcie *pci =3D to_dw_pcie_from_ep(ep);
> +
> +	if (!pci->ops->start_link)
> +		return -EINVAL;
> +
> +	return pci->ops->start_link(pci);
> +}
> +
> +static const struct pci_epc_ops epc_ops =3D {
> +	.write_header		=3D dw_pcie_ep_write_header,
> +	.set_bar		=3D dw_pcie_ep_set_bar,
> +	.clear_bar		=3D dw_pcie_ep_clear_bar,
> +	.map_addr		=3D dw_pcie_ep_map_addr,
> +	.unmap_addr		=3D dw_pcie_ep_unmap_addr,
> +	.set_msi		=3D dw_pcie_ep_set_msi,
> +	.get_msi		=3D dw_pcie_ep_get_msi,
> +	.raise_irq		=3D dw_pcie_ep_raise_irq,
> +	.start			=3D dw_pcie_ep_start,
> +	.stop			=3D dw_pcie_ep_stop,
> +};
> +
> +void dw_pcie_ep_exit(struct dw_pcie_ep *ep)
> +{
> +	struct pci_epc *epc =3D ep->epc;
> +
> +	pci_epc_mem_exit(epc);
> +}
> +
> +int dw_pcie_ep_init(struct dw_pcie_ep *ep)
> +{
> +	int ret;
> +	void *addr;
> +	enum pci_barno bar;
> +	struct pci_epc *epc;
> +	struct dw_pcie *pci =3D to_dw_pcie_from_ep(ep);
> +	struct device *dev =3D pci->dev;
> +	struct device_node *np =3D dev->of_node;
> +
> +	ret =3D of_property_read_u32(np, "num-ib-windows", &ep->num_ib_windows);
> +	if (ret < 0) {
> +		dev_err(dev, "unable to read *num-ib-windows* property\n");
> +		return ret;
> +	}
> +
> +	ret =3D 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;
> +	}
> +
> +	addr =3D devm_kzalloc(dev, sizeof(phys_addr_t) * ep->num_ob_windows,
> +			    GFP_KERNEL);
> +	if (!addr)
> +		return -ENOMEM;
> +	ep->outbound_addr =3D addr;
> +
> +	for (bar =3D BAR_0; bar <=3D BAR_5; bar++)
> +		dw_pcie_ep_reset_bar(pci, bar);
> +
> +	if (ep->ops->ep_init)
> +		ep->ops->ep_init(ep);
> +
> +	epc =3D devm_pci_epc_create(dev, &epc_ops);
> +	if (IS_ERR(epc)) {
> +		dev_err(dev, "failed to create epc device\n");
> +		return PTR_ERR(epc);
> +	}
> +
> +	ret =3D of_property_read_u8(np, "max-functions", &epc->max_functions);
> +	if (ret < 0)
> +		epc->max_functions =3D 1;
> +
> +	ret =3D pci_epc_mem_init(epc, ep->phys_base, ep->addr_size);
> +	if (ret < 0) {
> +		dev_err(dev, "Failed to initialize address space\n");
> +		return ret;
> +	}
> +
> +	ep->epc =3D epc;
> +	epc_set_drvdata(epc, ep);
> +	dw_pcie_setup(pci);
> +
> +	return 0;
> +}
> diff --git a/drivers/pci/dwc/pcie-designware.c b/drivers/pci/dwc/pcie-des=
ignware.c
> index 686945d..49b28c8 100644
> --- a/drivers/pci/dwc/pcie-designware.c
> +++ b/drivers/pci/dwc/pcie-designware.c
> @@ -173,6 +173,57 @@ void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, =
int index, int type,
>  	dev_err(pci->dev, "iATU is not being enabled\n");
>  }
>  =

> +int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, int index, int bar,
> +			     u64 cpu_addr, enum dw_pcie_as_type as_type)
> +{
> +	int type;
> +	void __iomem *base =3D pci->dbi_base;
> +
> +	dw_pcie_write_dbi(pci, base, PCIE_ATU_VIEWPORT, 0x4,
> +			  PCIE_ATU_REGION_INBOUND | index);
> +	dw_pcie_write_dbi(pci, base, PCIE_ATU_LOWER_TARGET, 0x4,
> +			  lower_32_bits(cpu_addr));
> +	dw_pcie_write_dbi(pci, base, PCIE_ATU_UPPER_TARGET, 0x4,
> +			  upper_32_bits(cpu_addr));
> +
> +	switch (as_type) {
> +	case DW_PCIE_AS_MEM:
> +		type =3D PCIE_ATU_TYPE_MEM;
> +		break;
> +	case DW_PCIE_AS_IO:
> +		type =3D PCIE_ATU_TYPE_IO;
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	dw_pcie_write_dbi(pci, base, PCIE_ATU_CR1, 0x4, type);
> +	dw_pcie_write_dbi(pci, base, PCIE_ATU_CR2, 0x4, PCIE_ATU_ENABLE |
> +			  PCIE_ATU_BAR_MODE_ENABLE | (bar << 8));
> +	return 0;
> +}
> +

This Atu programming is for PCI Cores <=3D 4.70. Please follow the same app=
roach as:
https://git.kernel.org/cgit/linux/kernel/git/helgaas/pci.git/tree/drivers/p=
ci/dwc/pcie-designware.c?h=3Dpci/host-designware#n95

> +void dw_pcie_disable_atu(struct dw_pcie *pci, int index,
> +			 enum dw_pcie_region_type type)
> +{
> +	int region;
> +	void __iomem *base =3D pci->dbi_base;
> +
> +	switch (type) {
> +	case DW_PCIE_REGION_INBOUND:
> +		region =3D PCIE_ATU_REGION_INBOUND;
> +		break;
> +	case DW_PCIE_REGION_OUTBOUND:
> +		region =3D PCIE_ATU_REGION_OUTBOUND;
> +		break;
> +	default:
> +		return;
> +	}
> +
> +	dw_pcie_write_dbi(pci, base, PCIE_ATU_VIEWPORT, 0x4, region | index);
> +	dw_pcie_write_dbi(pci, base, PCIE_ATU_CR2, 0x4, ~PCIE_ATU_ENABLE);
> +}
> +
>  int dw_pcie_wait_for_link(struct dw_pcie *pci)
>  {
>  	int retries;
> diff --git a/drivers/pci/dwc/pcie-designware.h b/drivers/pci/dwc/pcie-des=
ignware.h
> index 0ef6ae7..7476234 100644
> --- a/drivers/pci/dwc/pcie-designware.h
> +++ b/drivers/pci/dwc/pcie-designware.h
> @@ -18,6 +18,9 @@
>  #include <linux/msi.h>
>  #include <linux/pci.h>
>  =

> +#include <linux/pci-epc.h>
> +#include <linux/pci-epf.h>
> +
>  /* Parameters for the waiting for link up routine */
>  #define LINK_WAIT_MAX_RETRIES		10
>  #define LINK_WAIT_USLEEP_MIN		90000
> @@ -89,6 +92,13 @@
>  #define PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(region)	\
>  			((0x3 << 20) | ((region) << 9))
>  =

> +#define MSI_MESSAGE_CONTROL		0x52
> +#define MSI_CAP_MMC_SHIFT		1
> +#define MSI_CAP_MME_SHIFT		4
> +#define MSI_CAP_MME_MASK		(7 << MSI_CAP_MME_SHIFT)
> +#define MSI_MESSAGE_ADDR_L32		0x54
> +#define MSI_MESSAGE_ADDR_U32		0x58
> +
>  /*
>   * Maximum number of MSI IRQs can be 256 per controller. But keep
>   * it 32 as of now. Probably we will never need more than 32. If needed,
> @@ -99,6 +109,13 @@
>  =

>  struct pcie_port;
>  struct dw_pcie;
> +struct dw_pcie_ep;
> +
> +enum dw_pcie_region_type {
> +	DW_PCIE_REGION_UNKNOWN,
> +	DW_PCIE_REGION_INBOUND,
> +	DW_PCIE_REGION_OUTBOUND,
> +};
>  =

>  struct dw_pcie_host_ops {
>  	int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32 *val);
> @@ -142,6 +159,31 @@ struct pcie_port {
>  	DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS);
>  };
>  =

> +enum dw_pcie_as_type {
> +	DW_PCIE_AS_UNKNOWN,
> +	DW_PCIE_AS_MEM,
> +	DW_PCIE_AS_IO,
> +};
> +
> +struct dw_pcie_ep_ops {
> +	void	(*ep_init)(struct dw_pcie_ep *ep);
> +	int	(*raise_irq)(struct dw_pcie_ep *ep, enum pci_epc_irq_type type,
> +			     u8 interrupt_num);
> +};
> +
> +struct dw_pcie_ep {
> +	struct pci_epc		*epc;
> +	struct dw_pcie_ep_ops	*ops;
> +	phys_addr_t		phys_base;
> +	size_t			addr_size;
> +	u8			bar_to_atu[6];
> +	phys_addr_t		*outbound_addr;
> +	unsigned long		ib_window_map;
> +	unsigned long		ob_window_map;
> +	u32			num_ib_windows;
> +	u32			num_ob_windows;
> +};
> +
>  struct dw_pcie_ops {
>  	u64	(*cpu_addr_fixup)(u64 cpu_addr);
>  	u32	(*read_dbi)(struct dw_pcie *pcie, void __iomem *base, u32 reg,
> @@ -149,19 +191,26 @@ struct dw_pcie_ops {
>  	void	(*write_dbi)(struct dw_pcie *pcie, void __iomem *base, u32 reg,
>  			     int size, u32 val);
>  	int	(*link_up)(struct dw_pcie *pcie);
> +	int	(*start_link)(struct dw_pcie *pcie);
> +	void	(*stop_link)(struct dw_pcie *pcie);
>  };
>  =

>  struct dw_pcie {
>  	struct device		*dev;
>  	void __iomem		*dbi_base;
> +	void __iomem		*dbi_base2;
>  	u32			num_viewport;
>  	u8			iatu_unroll_enabled;
>  	struct pcie_port	pp;
> +	struct dw_pcie_ep	ep;
>  	const struct dw_pcie_ops *ops;
>  };
>  =

>  #define to_dw_pcie_from_pp(port) container_of((port), struct dw_pcie, pp)
>  =

> +#define to_dw_pcie_from_ep(endpoint)   \
> +		container_of((endpoint), struct dw_pcie, ep)
> +
>  int dw_pcie_read(void __iomem *addr, int size, u32 *val);
>  int dw_pcie_write(void __iomem *addr, int size, u32 val);
>  =

> @@ -174,6 +223,10 @@ void dw_pcie_write_dbi(struct dw_pcie *pci, void __i=
omem *base, u32 reg,
>  void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
>  			       int type, u64 cpu_addr, u64 pci_addr,
>  			       u32 size);
> +int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, int index, int bar,
> +			     u64 cpu_addr, enum dw_pcie_as_type as_type);
> +void dw_pcie_disable_atu(struct dw_pcie *pci, int index,
> +			 enum dw_pcie_region_type type);
>  void dw_pcie_setup(struct dw_pcie *pci);
>  =

>  #ifdef CONFIG_PCIE_DW_HOST
> @@ -200,4 +253,23 @@ static inline int dw_pcie_host_init(struct pcie_port=
 *pp)
>  	return 0;
>  }
>  #endif
> +
> +#ifdef CONFIG_PCIE_DW_EP
> +void dw_pcie_ep_linkup(struct dw_pcie_ep *ep);
> +int dw_pcie_ep_init(struct dw_pcie_ep *ep);
> +void dw_pcie_ep_exit(struct dw_pcie_ep *ep);
> +#else
> +static inline void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
> +{
> +}
> +
> +static inline int dw_pcie_ep_init(struct dw_pcie_ep *ep)
> +{
> +	return 0;
> +}
> +
> +static inline void dw_pcie_ep_exit(struct dw_pcie_ep *ep)
> +{
> +}
> +#endif
>  #endif /* _PCIE_DESIGNWARE_H */
> =



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