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From: Han Jingoo <jingoohan1@gmail.com>
To: Zhou Wang <wangzhou1@hisilicon.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
	"pratyush.anand@gmail.com" <pratyush.anand@gmail.com>,
	Arnd Bergmann <arnd@arndb.de>,
	"rmk+kernel@arm.linux.org.uk" <rmk+kernel@arm.linux.org.uk>,
	"thomas.petazzoni@free-electrons.com"
	<thomas.petazzoni@free-electrons.com>,
	"gabriele.paoloni@huawei.com" <gabriele.paoloni@huawei.com>,
	"lorenzo.pieralisi@arm.com" <lorenzo.pieralisi@arm.com>,
	"james.morse@arm.com" <james.morse@arm.com>,
	"Liviu.Dudau@arm.com" <Liviu.Dudau@arm.com>,
	"jason@lakedaemon.net" <jason@lakedaemon.net>,
	"robh@kernel.org" <robh@kernel.org>,
	"gabriel.fernandez@linaro.org" <gabriel.fernandez@linaro.org>,
	"Minghuan.Lian@freescale.com" <Minghuan.Lian@freescale.com>,
	"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>,
	"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"zhangjukuo@huawei.com" <zhangjukuo@huawei.com>,
	"qiuzhenfa@hisilicon.com" <qiuzhenfa@hisilicon.com>,
	"liudongdong3@huawei.com" <liudongdong3@huawei.com>,
	"qiujiang@huawei.com" <qiujiang@huawei.com>,
	"xuwei5@hisilicon.com" <xuwei5@hisilicon.com>,
	"liguozhu@hisilicon.com" <liguozhu@hisilicon.com>,
	Han Jingoo <jingoohan1@gmail.com>
Subject: Re: [PATCH v13 5/6] PCI: designware: Add ARM64 support
Date: Fri, 30 Oct 2015 10:18:08 +0900	[thread overview]
Message-ID: <CAPOBaE5UkNJ_tCfQr-zK8fDR7XrUw-UWRgV6qsSpbz67XHE5-A@mail.gmail.com> (raw)
In-Reply-To: <1446111638-197070-6-git-send-email-wangzhou1@hisilicon.com>

[-- Attachment #1: Type: text/plain, Size: 9900 bytes --]

Sorry for being late.
It looks good.

Acked-by: Jingoo Han <jingoohan1@gmail.com>

2015. 10. 29. Thursday, Zhou Wang<wangzhou1@hisilicon.com> wrote:

> This patch tries to unify ARM32 and ARM64 PCIe in designware driver. Delete
> function dw_pcie_setup, dw_pcie_scan_bus, dw_pcie_map_irq and struct
> hw_pci,
> move related operations to dw_pcie_host_init.
>
> As dw_pcie_setup is removed, we also remove io_base_tmp which was
> introduced
> in "PCI: designware: Remove *_mod_base".
>
> Signed-off-by: Zhou Wang <wangzhou1@hisilicon.com <javascript:;>>
> Signed-off-by: Gabriele Paoloni <gabriele.paoloni@huawei.com
> <javascript:;>>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de <javascript:;>>
> Tested-by: James Morse <james.morse@arm.com <javascript:;>>
> Tested-by: Gabriel Fernandez <gabriel.fernandez@st.com <javascript:;>>
> Tested-by: Minghuan Lian <Minghuan.Lian@freescale.com <javascript:;>>
> Acked-by: Pratyush Anand <pratyush.anand@gmail.com <javascript:;>>
> ---
>  drivers/pci/host/pcie-designware.c | 128
> +++++++++++--------------------------
>  drivers/pci/host/pcie-designware.h |   1 -
>  2 files changed, 38 insertions(+), 91 deletions(-)
>
> diff --git a/drivers/pci/host/pcie-designware.c
> b/drivers/pci/host/pcie-designware.c
> index 089b6cf..1a6d3e1 100644
> --- a/drivers/pci/host/pcie-designware.c
> +++ b/drivers/pci/host/pcie-designware.c
> @@ -69,16 +69,7 @@
>  #define PCIE_ATU_FUNC(x)               (((x) & 0x7) << 16)
>  #define PCIE_ATU_UPPER_TARGET          0x91C
>
> -static struct hw_pci dw_pci;
> -
> -static unsigned long global_io_offset;
> -
> -static inline struct pcie_port *sys_to_pcie(struct pci_sys_data *sys)
> -{
> -       BUG_ON(!sys->private_data);
> -
> -       return sys->private_data;
> -}
> +static struct pci_ops dw_pcie_ops;
>
>  int dw_pcie_cfg_read(void __iomem *addr, int where, int size, u32 *val)
>  {
> @@ -255,7 +246,7 @@ static void dw_pcie_msi_set_irq(struct pcie_port *pp,
> int irq)
>  static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos)
>  {
>         int irq, pos0, i;
> -       struct pcie_port *pp = sys_to_pcie(msi_desc_to_pci_sysdata(desc));
> +       struct pcie_port *pp = (struct pcie_port *)
> msi_desc_to_pci_sysdata(desc);
>
>         pos0 = bitmap_find_free_region(pp->msi_irq_in_use, MAX_MSI_IRQS,
>                                        order_base_2(no_irqs));
> @@ -298,7 +289,7 @@ static int dw_msi_setup_irq(struct msi_controller
> *chip, struct pci_dev *pdev,
>  {
>         int irq, pos;
>         struct msi_msg msg;
> -       struct pcie_port *pp = sys_to_pcie(pdev->bus->sysdata);
> +       struct pcie_port *pp = pdev->bus->sysdata;
>
>         if (desc->msi_attrib.is_msix)
>                 return -EINVAL;
> @@ -327,7 +318,7 @@ static void dw_msi_teardown_irq(struct msi_controller
> *chip, unsigned int irq)
>  {
>         struct irq_data *data = irq_get_irq_data(irq);
>         struct msi_desc *msi = irq_data_get_msi_desc(data);
> -       struct pcie_port *pp = sys_to_pcie(msi_desc_to_pci_sysdata(msi));
> +       struct pcie_port *pp = (struct pcie_port *)
> msi_desc_to_pci_sysdata(msi);
>
>         clear_irq_range(pp, irq, 1, data->hwirq);
>  }
> @@ -362,6 +353,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
>  {
>         struct device_node *np = pp->dev->of_node;
>         struct platform_device *pdev = to_platform_device(pp->dev);
> +       struct pci_bus *bus, *child;
>         struct resource *cfg_res;
>         u32 val;
>         int i, ret;
> @@ -390,14 +382,13 @@ int dw_pcie_host_init(struct pcie_port *pp)
>                         pp->io->name = "I/O";
>                         pp->io_size = resource_size(pp->io);
>                         pp->io_bus_addr = pp->io->start - win->offset;
> -                       pp->io->start = max_t(resource_size_t,
> PCIBIOS_MIN_IO,
> -                                             pp->io_bus_addr +
> -                                             global_io_offset);
> -                       pp->io->end = min_t(resource_size_t,
> IO_SPACE_LIMIT,
> -                                           pp->io_bus_addr + pp->io_size +
> -                                           global_io_offset - 1);
> +                       ret = pci_remap_iospace(pp->io, pp->io_base);
> +                       if (ret) {
> +                               dev_warn(pp->dev, "error %d: failed to map
> resource %pR\n",
> +                                        ret, pp->io);
> +                               continue;
> +                       }
>                         pp->io_base = pp->io->start;
> -                       pp->io_base_tmp = pp->io->start;
>                         break;
>                 case IORESOURCE_MEM:
>                         pp->mem = win->res;
> @@ -490,15 +481,35 @@ int dw_pcie_host_init(struct pcie_port *pp)
>         val |= PORT_LOGIC_SPEED_CHANGE;
>         dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val);
>
> -#ifdef CONFIG_PCI_MSI
> -       dw_pcie_msi_chip.dev = pp->dev;
> +       pp->root_bus_nr = pp->busn->start;
> +       if (IS_ENABLED(CONFIG_PCI_MSI)) {
> +               bus = pci_scan_root_bus_msi(pp->dev, pp->root_bus_nr,
> +                                           &dw_pcie_ops, pp, &res,
> +                                           &dw_pcie_msi_chip);
> +               dw_pcie_msi_chip.dev = pp->dev;
> +       } else
> +               bus = pci_scan_root_bus(pp->dev, pp->root_bus_nr,
> &dw_pcie_ops,
> +                                       pp, &res);
> +       if (!bus)
> +               return -ENOMEM;
> +
> +       if (pp->ops->scan_bus)
> +               pp->ops->scan_bus(pp);
> +
> +#ifdef CONFIG_ARM
> +       /* support old dtbs that incorrectly describe IRQs */
> +       pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
>  #endif
>
> -       dw_pci.nr_controllers = 1;
> -       dw_pci.private_data = (void **)&pp;
> +       if (!pci_has_flag(PCI_PROBE_ONLY)) {
> +               pci_bus_size_bridges(bus);
> +               pci_bus_assign_resources(bus);
>
> -       pci_common_init_dev(pp->dev, &dw_pci);
> +               list_for_each_entry(child, &bus->children, node)
> +                       pcie_bus_configure_settings(child);
> +       }
>
> +       pci_bus_add_devices(bus);
>         return 0;
>  }
>
> @@ -598,7 +609,7 @@ static int dw_pcie_valid_config(struct pcie_port *pp,
>  static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
>                         int size, u32 *val)
>  {
> -       struct pcie_port *pp = sys_to_pcie(bus->sysdata);
> +       struct pcie_port *pp = bus->sysdata;
>         int ret;
>
>         if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0) {
> @@ -622,7 +633,7 @@ static int dw_pcie_rd_conf(struct pci_bus *bus, u32
> devfn, int where,
>  static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
>                         int where, int size, u32 val)
>  {
> -       struct pcie_port *pp = sys_to_pcie(bus->sysdata);
> +       struct pcie_port *pp = bus->sysdata;
>         int ret;
>
>         if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0)
> @@ -646,69 +657,6 @@ static struct pci_ops dw_pcie_ops = {
>         .write = dw_pcie_wr_conf,
>  };
>
> -static int dw_pcie_setup(int nr, struct pci_sys_data *sys)
> -{
> -       struct pcie_port *pp;
> -
> -       pp = sys_to_pcie(sys);
> -
> -       if (global_io_offset < SZ_1M && pp->io_size > 0) {
> -               sys->io_offset = global_io_offset - pp->io_bus_addr;
> -               pci_ioremap_io(global_io_offset, pp->io_base_tmp);
> -               global_io_offset += SZ_64K;
> -               pci_add_resource_offset(&sys->resources, pp->io,
> -                                       sys->io_offset);
> -       }
> -
> -       sys->mem_offset = pp->mem->start - pp->mem_bus_addr;
> -       pci_add_resource_offset(&sys->resources, pp->mem, sys->mem_offset);
> -       pci_add_resource(&sys->resources, pp->busn);
> -
> -       return 1;
> -}
> -
> -static struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys)
> -{
> -       struct pci_bus *bus;
> -       struct pcie_port *pp = sys_to_pcie(sys);
> -
> -       pp->root_bus_nr = sys->busnr;
> -
> -       if (IS_ENABLED(CONFIG_PCI_MSI))
> -               bus = pci_scan_root_bus_msi(pp->dev, sys->busnr,
> &dw_pcie_ops,
> -                                           sys, &sys->resources,
> -                                           &dw_pcie_msi_chip);
> -       else
> -               bus = pci_scan_root_bus(pp->dev, sys->busnr, &dw_pcie_ops,
> -                                       sys, &sys->resources);
> -
> -       if (!bus)
> -               return NULL;
> -
> -       if (bus && pp->ops->scan_bus)
> -               pp->ops->scan_bus(pp);
> -
> -       return bus;
> -}
> -
> -static int dw_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
> -{
> -       struct pcie_port *pp = sys_to_pcie(dev->bus->sysdata);
> -       int irq;
> -
> -       irq = of_irq_parse_and_map_pci(dev, slot, pin);
> -       if (!irq)
> -               irq = pp->irq;
> -
> -       return irq;
> -}
> -
> -static struct hw_pci dw_pci = {
> -       .setup          = dw_pcie_setup,
> -       .scan           = dw_pcie_scan_bus,
> -       .map_irq        = dw_pcie_map_irq,
> -};
> -
>  void dw_pcie_setup_rc(struct pcie_port *pp)
>  {
>         u32 val;
> diff --git a/drivers/pci/host/pcie-designware.h
> b/drivers/pci/host/pcie-designware.h
> index 91a36f6..264c969 100644
> --- a/drivers/pci/host/pcie-designware.h
> +++ b/drivers/pci/host/pcie-designware.h
> @@ -33,7 +33,6 @@ struct pcie_port {
>         void __iomem            *va_cfg1_base;
>         u32                     cfg1_size;
>         resource_size_t         io_base;
> -       resource_size_t         io_base_tmp;
>         phys_addr_t             io_bus_addr;
>         u32                     io_size;
>         u64                     mem_base;
> --
> 1.9.1
>
>

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  reply	other threads:[~2015-10-30  1:18 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-10-29  9:40 [PATCH v13 0/6] PCI: hisi: Add PCIe host support for HiSilicon SoC Hip05 Zhou Wang
2015-10-29  9:40 ` [PATCH v13 1/6] PCI: designware: Move calculation of bus addresses to DRA7xx Zhou Wang
2015-10-29  9:40 ` [PATCH v13 2/6] PCI: designware: Remove *_mod_base Zhou Wang
2015-10-30  1:27   ` Han Jingoo
2015-10-29  9:40 ` [PATCH v13 3/6] PCI: designware: Replace DT PCI ranges parse with of_pci_get_host_bridge_resources Zhou Wang
2015-10-29  9:40 ` [PATCH v13 4/6] ARM/PCI: Replace pci_sys_data->align_resource with global function pointer Zhou Wang
2015-10-29  9:40 ` [PATCH v13 5/6] PCI: designware: Add ARM64 support Zhou Wang
2015-10-30  1:18   ` Han Jingoo [this message]
2015-10-29  9:40 ` [PATCH v13 6/6] PCI: hisi: Add PCIe host support for HiSilicon SoC Hip05 Zhou Wang
2015-11-02 14:12 ` [PATCH v13 0/6] " Gabriele Paoloni

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