RE: [PATCH v5 4/7] PCI: endpoint: Add support to handle multiple base for mapping outbound memory

From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
To: Lad Prabhakar <prabhakar.csengg@gmail.com>
Cc: Andrew Murray <andrew.murray@arm.com>,
	"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"linux-renesas-soc@vger.kernel.org" 
	<linux-renesas-soc@vger.kernel.org>,
	"linux-rockchip@lists.infradead.org" 
	<linux-rockchip@lists.infradead.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
	Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@bp.renesas.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	Kishon Vijay Abraham I <kishon@ti.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Jingoo Han <jingoohan1@gmail.com>,
	Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
	Marek Vasut <marek.vasut+renesas@gmail.com>,
	Shawn Lin <shawn.lin@rock-chips.com>,
	Heiko Stuebner <heiko@sntech.de>
Subject: RE: [PATCH v5 4/7] PCI: endpoint: Add support to handle multiple base for mapping outbound memory
Date: Tue, 17 Mar 2020 08:11:41 +0000	[thread overview]
Message-ID: <TYAPR01MB4544599A72C88666B4F972B7D8F60@TYAPR01MB4544.jpnprd01.prod.outlook.com> (raw)
In-Reply-To: <20200228154122.14164-5-prabhakar.mahadev-lad.rj@bp.renesas.com>

Hi Prabhakar-san,

Thank you for the patch!

> From: Lad Prabhakar, Sent: Saturday, February 29, 2020 12:41 AM
> 
> R-Car PCIe controller has support to map multiple memory regions for
> mapping the outbound memory in local system also the controller limits
> single allocation for each region (that is, once a chunk is used from the
> region it cannot be used to allocate a new one). This features inspires to
> add support for handling multiple memory bases in endpoint framework.
> 
> With this patch pci_epc_mem_init() now accepts multiple regions, also
> page_size for each memory region is passed during initialization so as
> to handle single allocation for each region by setting the page_size to
> window_size.
> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
>  drivers/pci/controller/cadence/pcie-cadence-ep.c |   7 +-
>  drivers/pci/controller/dwc/pcie-designware-ep.c  |  29 ++--
>  drivers/pci/controller/pcie-rockchip-ep.c        |   7 +-
>  drivers/pci/endpoint/pci-epc-mem.c               | 167 ++++++++++++++++-------

I could not apply this patch on the latest pci.git / next branch.
So, you need to rebase.

>  include/linux/pci-epc.h                          |  39 ++++--
>  5 files changed, 169 insertions(+), 80 deletions(-)
> 
> diff --git a/drivers/pci/controller/cadence/pcie-cadence-ep.c b/drivers/pci/controller/cadence/pcie-cadence-ep.c
> index 1c173da..90e32438 100644
> --- a/drivers/pci/controller/cadence/pcie-cadence-ep.c
> +++ b/drivers/pci/controller/cadence/pcie-cadence-ep.c
> @@ -401,6 +401,7 @@ int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep)
>  	struct device *dev = ep->pcie.dev;
>  	struct platform_device *pdev = to_platform_device(dev);
>  	struct device_node *np = dev->of_node;
> +	struct pci_epc_mem_window mem_window;
>  	struct cdns_pcie *pcie = &ep->pcie;
>  	struct resource *res;
>  	struct pci_epc *epc;
> @@ -449,8 +450,10 @@ int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep)
>  	if (of_property_read_u8(np, "max-functions", &epc->max_functions) < 0)
>  		epc->max_functions = 1;
> 
> -	ret = pci_epc_mem_init(epc, pcie->mem_res->start,
> -			       resource_size(pcie->mem_res));
> +	mem_window.phys_base = pcie->mem_res->start;
> +	mem_window.size = resource_size(pcie->mem_res);
> +	mem_window.page_size = PAGE_SIZE;
> +	ret = pci_epc_mem_init(epc, &mem_window, 1);

I'm not sure my idea is acceptable or not but,
I think we can have compatible API for single window like below.
- In this patch, pci_epc_mem_init() and __pci_epc_mem_init() become the same behavior.
  So, for example, pci_epc_mem_init() is for simple, and __pci_epc_mem_init() is multiple windows.
-- In this case, pci_epc_mem_init() should have page_size argument.
- The original "mem" in the pci_epc can be the default window instead of
  PCI_EPC_DEFAULT_WINDOW.

>  	if (ret < 0) {
>  		dev_err(dev, "failed to initialize the memory space\n");
>  		goto err_init;
> diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
> index cfeccd7..b150ef3 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-ep.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
> @@ -195,8 +195,7 @@ static void dw_pcie_ep_unmap_addr(struct pci_epc *epc, u8 func_no,
>  }
> 
>  static int dw_pcie_ep_map_addr(struct pci_epc *epc, u8 func_no,
> -			       phys_addr_t addr,
> -			       u64 pci_addr, size_t size)
> +			       phys_addr_t addr, u64 pci_addr, size_t size)
>  {
>  	int ret;
>  	struct dw_pcie_ep *ep = epc_get_drvdata(epc);
> @@ -367,6 +366,7 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
>  	unsigned int aligned_offset;
>  	u16 msg_ctrl, msg_data;
>  	u32 msg_addr_lower, msg_addr_upper, reg;
> +	int window = PCI_EPC_DEFAULT_WINDOW;
>  	u64 msg_addr;
>  	bool has_upper;
>  	int ret;
> @@ -390,11 +390,11 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
>  		reg = ep->msi_cap + PCI_MSI_DATA_32;
>  		msg_data = dw_pcie_readw_dbi(pci, reg);
>  	}
> -	aligned_offset = msg_addr_lower & (epc->mem->page_size - 1);
> +	aligned_offset = msg_addr_lower & (epc->mem[window]->page_size - 1);
>  	msg_addr = ((u64)msg_addr_upper) << 32 |
>  			(msg_addr_lower & ~aligned_offset);
> -	ret = dw_pcie_ep_map_addr(epc, func_no, ep->msi_mem_phys, msg_addr,
> -				  epc->mem->page_size);
> +	ret = dw_pcie_ep_map_addr(epc, func_no, ep->msi_mem_phys,
> +				  msg_addr, epc->mem[window]->page_size);
>  	if (ret)
>  		return ret;
> 
> @@ -416,6 +416,7 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
>  	u32 reg, msg_data, vec_ctrl;
>  	u64 tbl_addr, msg_addr, reg_u64;
>  	void __iomem *msix_tbl;
> +	int window = PCI_EPC_DEFAULT_WINDOW;
>  	int ret;
> 
>  	reg = ep->msix_cap + PCI_MSIX_TABLE;
> @@ -452,8 +453,8 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
>  		return -EPERM;
>  	}
> 
> -	ret = dw_pcie_ep_map_addr(epc, func_no, ep->msi_mem_phys, msg_addr,
> -				  epc->mem->page_size);
> +	ret = dw_pcie_ep_map_addr(epc, func_no, ep->msi_mem_phys,
> +				  msg_addr, epc->mem[window]->page_size);
>  	if (ret)
>  		return ret;
> 
> @@ -466,10 +467,11 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
> 
>  void dw_pcie_ep_exit(struct dw_pcie_ep *ep)
>  {
> +	int window = PCI_EPC_DEFAULT_WINDOW;
>  	struct pci_epc *epc = ep->epc;
> 
>  	pci_epc_mem_free_addr(epc, ep->msi_mem_phys, ep->msi_mem,
> -			      epc->mem->page_size);
> +			      epc->mem[window]->page_size);
> 
>  	pci_epc_mem_exit(epc);
>  }
> @@ -502,6 +504,8 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
>  	unsigned int nbars;
>  	unsigned int offset;
>  	struct pci_epc *epc;
> +	size_t msi_page_size;
> +	struct pci_epc_mem_window mem_window;
>  	struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
>  	struct device *dev = pci->dev;
>  	struct device_node *np = dev->of_node;
> @@ -574,15 +578,18 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
>  	if (ret < 0)
>  		epc->max_functions = 1;
> 
> -	ret = __pci_epc_mem_init(epc, ep->phys_base, ep->addr_size,
> -				 ep->page_size);
> +	mem_window.phys_base = ep->phys_base;
> +	mem_window.size = ep->addr_size;
> +	mem_window.page_size = ep->page_size;
> +	ret = __pci_epc_mem_init(epc, &mem_window, 1);
>  	if (ret < 0) {
>  		dev_err(dev, "Failed to initialize address space\n");
>  		return ret;
>  	}
> 
> +	msi_page_size = epc->mem[PCI_EPC_DEFAULT_WINDOW]->page_size;
>  	ep->msi_mem = pci_epc_mem_alloc_addr(epc, &ep->msi_mem_phys,
> -					     epc->mem->page_size);
> +					     msi_page_size);
>  	if (!ep->msi_mem) {
>  		dev_err(dev, "Failed to reserve memory for MSI/MSI-X\n");
>  		return -ENOMEM;
> diff --git a/drivers/pci/controller/pcie-rockchip-ep.c b/drivers/pci/controller/pcie-rockchip-ep.c
> index d743b0a..5a97390 100644
> --- a/drivers/pci/controller/pcie-rockchip-ep.c
> +++ b/drivers/pci/controller/pcie-rockchip-ep.c
> @@ -562,6 +562,7 @@ static const struct of_device_id rockchip_pcie_ep_of_match[] = {
> 
>  static int rockchip_pcie_ep_probe(struct platform_device *pdev)
>  {
> +	struct pci_epc_mem_window mem_window;
>  	struct device *dev = &pdev->dev;
>  	struct rockchip_pcie_ep *ep;
>  	struct rockchip_pcie *rockchip;
> @@ -614,8 +615,10 @@ static int rockchip_pcie_ep_probe(struct platform_device *pdev)
>  	/* Only enable function 0 by default */
>  	rockchip_pcie_write(rockchip, BIT(0), PCIE_CORE_PHY_FUNC_CFG);
> 
> -	err = pci_epc_mem_init(epc, rockchip->mem_res->start,
> -			       resource_size(rockchip->mem_res));
> +	mem_window.phys_base = rockchip->mem_res->start;
> +	mem_window.size = resource_size(rockchip->mem_res);
> +	mem_window.page_size = PAGE_SIZE;
> +	err = pci_epc_mem_init(epc, &mem_window, 1);
>  	if (err < 0) {
>  		dev_err(dev, "failed to initialize the memory space\n");
>  		goto err_uninit_port;
> diff --git a/drivers/pci/endpoint/pci-epc-mem.c b/drivers/pci/endpoint/pci-epc-mem.c
> index d2b174c..6c21957 100644
> --- a/drivers/pci/endpoint/pci-epc-mem.c
> +++ b/drivers/pci/endpoint/pci-epc-mem.c
> @@ -38,57 +38,76 @@ static int pci_epc_mem_get_order(struct pci_epc_mem *mem, size_t size)
>  /**
>   * __pci_epc_mem_init() - initialize the pci_epc_mem structure
>   * @epc: the EPC device that invoked pci_epc_mem_init
> - * @phys_base: the physical address of the base
> - * @size: the size of the address space
> - * @page_size: size of each page
> + * @windows: pointer to windows supported by the device
> + * @num_windows: number of windows device supports
>   *
>   * Invoke to initialize the pci_epc_mem structure used by the
>   * endpoint functions to allocate mapped PCI address.
>   */
> -int __pci_epc_mem_init(struct pci_epc *epc, phys_addr_t phys_base, size_t size,
> -		       size_t page_size)
> +int __pci_epc_mem_init(struct pci_epc *epc, struct pci_epc_mem_window *windows,
> +		       int num_windows)
>  {
> -	int ret;
> -	struct pci_epc_mem *mem;
> -	unsigned long *bitmap;
> +	struct pci_epc_mem *mem = NULL;
> +	unsigned long *bitmap = NULL;
>  	unsigned int page_shift;
> -	int pages;
> +	size_t page_size;
>  	int bitmap_size;
> -
> -	if (page_size < PAGE_SIZE)
> -		page_size = PAGE_SIZE;
> -
> -	page_shift = ilog2(page_size);
> -	pages = size >> page_shift;
> -	bitmap_size = BITS_TO_LONGS(pages) * sizeof(long);
> -
> -	mem = kzalloc(sizeof(*mem), GFP_KERNEL);
> -	if (!mem) {
> -		ret = -ENOMEM;
> -		goto err;
> -	}
> -
> -	bitmap = kzalloc(bitmap_size, GFP_KERNEL);
> -	if (!bitmap) {
> -		ret = -ENOMEM;
> -		goto err_mem;
> +	int pages;
> +	int ret;
> +	int i;
> +
> +	epc->mem_windows = 0;
> +
> +	if (!windows)
> +		return -EINVAL;
> +
> +	if (num_windows <= 0)
> +		return -EINVAL;
> +
> +	epc->mem = kcalloc(num_windows, sizeof(*mem), GFP_KERNEL);
> +	if (!epc->mem)
> +		return -EINVAL;
> +
> +	for (i = 0; i < num_windows; i++) {
> +		page_size = windows[i].page_size;
> +		if (page_size < PAGE_SIZE)
> +			page_size = PAGE_SIZE;
> +		page_shift = ilog2(page_size);
> +		pages = windows[i].size >> page_shift;
> +		bitmap_size = BITS_TO_LONGS(pages) * sizeof(long);
> +
> +		mem = kzalloc(sizeof(*mem), GFP_KERNEL);
> +		if (!mem) {
> +			ret = -ENOMEM;
> +			goto err_mem;
> +		}
> +
> +		bitmap = kzalloc(bitmap_size, GFP_KERNEL);
> +		if (!bitmap) {
> +			ret = -ENOMEM;
> +			goto err_mem;
> +		}
> +
> +		mem->bitmap = bitmap;
> +		mem->window.phys_base = windows[i].phys_base;

I could not understand why the window member is needed.
I think original members (just phys_base and size) are enough.
Also, this function doesn't store the page_size to mem->window.page_size.

> +		mem->page_size = page_size;
> +		mem->pages = pages;
> +		mem->window.size = windows[i].size;
> +		epc->mem[i] = mem;
>  	}
> -
> -	mem->bitmap = bitmap;
> -	mem->phys_base = phys_base;
> -	mem->page_size = page_size;
> -	mem->pages = pages;
> -	mem->size = size;
> -
> -	epc->mem = mem;
> +	epc->mem_windows = num_windows;
> 
>  	return 0;
> 
>  err_mem:
> -	kfree(mem);
> +	for (; i >= 0; i--) {
> +		mem = epc->mem[i];
> +		kfree(mem->bitmap);

If bitmap cannot be allocated, the epc->mem[i] is NULL.
So, freeing mem->bitmap anyway is not good.

> +		kfree(mem);
> +	}
> +	kfree(epc->mem);
> 
> -err:
> -return ret;
> +	return ret;
>  }
>  EXPORT_SYMBOL_GPL(__pci_epc_mem_init);
> 
> @@ -101,11 +120,21 @@ EXPORT_SYMBOL_GPL(__pci_epc_mem_init);
>   */
>  void pci_epc_mem_exit(struct pci_epc *epc)
>  {
> -	struct pci_epc_mem *mem = epc->mem;
> +	struct pci_epc_mem *mem;
> +	int i;
> +
> +	if (!epc->mem_windows)
> +		return;
> +
> +	for (i = 0; i <= epc->mem_windows; i++) {
> +		mem = epc->mem[i];
> +		kfree(mem->bitmap);
> +		kfree(mem);
> +	}
> +	kfree(epc->mem);
> 
>  	epc->mem = NULL;
> -	kfree(mem->bitmap);
> -	kfree(mem);
> +	epc->mem_windows = 0;
>  }
>  EXPORT_SYMBOL_GPL(pci_epc_mem_exit);
> 
> @@ -121,20 +150,30 @@ EXPORT_SYMBOL_GPL(pci_epc_mem_exit);
>  void __iomem *pci_epc_mem_alloc_addr(struct pci_epc *epc,
>  				     phys_addr_t *phys_addr, size_t size)
>  {
> -	int pageno;
> -	void __iomem *virt_addr;
> -	struct pci_epc_mem *mem = epc->mem;
> -	unsigned int page_shift = ilog2(mem->page_size);
> +	void __iomem *virt_addr = NULL;
> +	struct pci_epc_mem *mem;
> +	unsigned int page_shift;
> +	int pageno = -EINVAL;
>  	int order;
> +	int i;
> 
> -	size = ALIGN(size, mem->page_size);
> -	order = pci_epc_mem_get_order(mem, size);
> +	for (i = 0; i < epc->mem_windows; i++) {
> +		mem = epc->mem[i];
> +		size = ALIGN(size, mem->page_size);
> +		order = pci_epc_mem_get_order(mem, size);
> +
> +		pageno = bitmap_find_free_region(mem->bitmap, mem->pages,
> +						 order);
> +		if (pageno >= 0)
> +			break;
> +	}
> 
> -	pageno = bitmap_find_free_region(mem->bitmap, mem->pages, order);
>  	if (pageno < 0)
>  		return NULL;
> 
> -	*phys_addr = mem->phys_base + ((phys_addr_t)pageno << page_shift);
> +	page_shift = ilog2(mem->page_size);
> +	*phys_addr = mem->window.phys_base +
> +		     ((phys_addr_t)pageno << page_shift);
>  	virt_addr = ioremap(*phys_addr, size);
>  	if (!virt_addr)
>  		bitmap_release_region(mem->bitmap, pageno, order);
> @@ -143,6 +182,23 @@ void __iomem *pci_epc_mem_alloc_addr(struct pci_epc *epc,
>  }
>  EXPORT_SYMBOL_GPL(pci_epc_mem_alloc_addr);
> 
> +struct pci_epc_mem *pci_epc_get_matching_window(struct pci_epc *epc,
> +						phys_addr_t phys_addr)
> +{
> +	struct pci_epc_mem *mem;
> +	int i;
> +
> +	for (i = 0; i < epc->mem_windows; i++) {
> +		mem = epc->mem[i];
> +
> +		if (phys_addr >= mem->window.phys_base &&
> +		    phys_addr < (mem->window.phys_base + mem->window.size))
> +			return mem;
> +	}
> +
> +	return NULL;
> +}
> +
>  /**
>   * pci_epc_mem_free_addr() - free the allocated memory address
>   * @epc: the EPC device on which memory was allocated
> @@ -155,13 +211,20 @@ EXPORT_SYMBOL_GPL(pci_epc_mem_alloc_addr);
>  void pci_epc_mem_free_addr(struct pci_epc *epc, phys_addr_t phys_addr,
>  			   void __iomem *virt_addr, size_t size)
>  {
> +	struct pci_epc_mem *mem;
> +	unsigned int page_shift;
>  	int pageno;
> -	struct pci_epc_mem *mem = epc->mem;
> -	unsigned int page_shift = ilog2(mem->page_size);
>  	int order;
> 
> +	mem = pci_epc_get_matching_window(epc, phys_addr);
> +	if (!mem) {
> +		pr_err("failed to get matching window\n");
> +		return;
> +	}
> +
> +	page_shift = ilog2(mem->page_size);
>  	iounmap(virt_addr);
> -	pageno = (phys_addr - mem->phys_base) >> page_shift;
> +	pageno = (phys_addr - mem->window.phys_base) >> page_shift;
>  	size = ALIGN(size, mem->page_size);
>  	order = pci_epc_mem_get_order(mem, size);
>  	bitmap_release_region(mem->bitmap, pageno, order);
> diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h
> index 56f1846..dde42e5 100644
> --- a/include/linux/pci-epc.h
> +++ b/include/linux/pci-epc.h
> @@ -64,17 +64,29 @@ struct pci_epc_ops {
>  	struct module *owner;
>  };
> 
> +#define PCI_EPC_DEFAULT_WINDOW         0
> +
> +/**
> + * struct pci_epc_mem_window - address window of the endpoint controller
> + * @phys_base: physical base address of the PCI address window
> + * @size: the size of the PCI address window
> + * @page_size: size of each page
> + */
> +struct pci_epc_mem_window {
> +	phys_addr_t	phys_base;
> +	size_t		size;
> +	size_t		page_size;
> +};
> +
>  /**
>   * struct pci_epc_mem - address space of the endpoint controller
> - * @phys_base: physical base address of the PCI address space
> - * @size: the size of the PCI address space
> + * @window: address window of the endpoint controller
>   * @bitmap: bitmap to manage the PCI address space
> - * @pages: number of bits representing the address region
>   * @page_size: size of each page
> + * @pages: number of bits representing the address region
>   */
>  struct pci_epc_mem {
> -	phys_addr_t	phys_base;
> -	size_t		size;
> +	struct pci_epc_mem_window window;
>  	unsigned long	*bitmap;
>  	size_t		page_size;
>  	int		pages;
> @@ -85,7 +97,8 @@ struct pci_epc_mem {
>   * @dev: PCI EPC device
>   * @pci_epf: list of endpoint functions present in this EPC device
>   * @ops: function pointers for performing endpoint operations
> - * @mem: address space of the endpoint controller

If my idea is acceptable, this should be "default address space ...".

> + * @mem: array of address space of the endpoint controller

And, this should be difference name.

> + * @mem_windows: number of windows supported by device

Perhaps, num_windows?

>   * @max_functions: max number of functions that can be configured in this EPC
>   * @group: configfs group representing the PCI EPC device
>   * @lock: spinlock to protect pci_epc ops
> @@ -94,7 +107,8 @@ struct pci_epc {
>  	struct device			dev;
>  	struct list_head		pci_epf;
>  	const struct pci_epc_ops	*ops;
> -	struct pci_epc_mem		*mem;
> +	struct pci_epc_mem		**mem;
> +	unsigned int			mem_windows;
>  	u8				max_functions;
>  	struct config_group		*group;
>  	/* spinlock to protect against concurrent access of EP controller */
> @@ -128,8 +142,8 @@ struct pci_epc_features {
>  #define devm_pci_epc_create(dev, ops)    \
>  		__devm_pci_epc_create((dev), (ops), THIS_MODULE)
> 
> -#define pci_epc_mem_init(epc, phys_addr, size)	\
> -		__pci_epc_mem_init((epc), (phys_addr), (size), PAGE_SIZE)
> +#define pci_epc_mem_init(epc, windows, num_windows)	\
> +		__pci_epc_mem_init((epc), windows, num_windows)

As I mentioned above, pci_epc_mem_init() and __ pci_epc_mem_init() are the same behavior.

>  static inline void epc_set_drvdata(struct pci_epc *epc, void *data)
>  {
> @@ -159,8 +173,7 @@ int pci_epc_set_bar(struct pci_epc *epc, u8 func_no,
>  void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no,
>  		       struct pci_epf_bar *epf_bar);
>  int pci_epc_map_addr(struct pci_epc *epc, u8 func_no,
> -		     phys_addr_t phys_addr,
> -		     u64 pci_addr, size_t size);
> +		     phys_addr_t phys_addr, u64 pci_addr, size_t size);

Perhaps, this is not needed to change?

Best regards,
Yoshihiro Shimoda

>  void pci_epc_unmap_addr(struct pci_epc *epc, u8 func_no,
>  			phys_addr_t phys_addr);
>  int pci_epc_set_msi(struct pci_epc *epc, u8 func_no, u8 interrupts);
> @@ -178,8 +191,8 @@ unsigned int pci_epc_get_first_free_bar(const struct pci_epc_features
>  struct pci_epc *pci_epc_get(const char *epc_name);
>  void pci_epc_put(struct pci_epc *epc);
> 
> -int __pci_epc_mem_init(struct pci_epc *epc, phys_addr_t phys_addr, size_t size,
> -		       size_t page_size);
> +int __pci_epc_mem_init(struct pci_epc *epc, struct pci_epc_mem_window *window,
> +		       int num_windows);
>  void pci_epc_mem_exit(struct pci_epc *epc);
>  void __iomem *pci_epc_mem_alloc_addr(struct pci_epc *epc,
>  				     phys_addr_t *phys_addr, size_t size);
> --
> 2.7.4