| Message ID | 1437461323-3531-2-git-send-email-wangzhou1@hisilicon.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
Hi Zhou & Gabriele, On Tue, Jul 21, 2015 at 02:48:39PM +0800, Zhou Wang wrote: > This patch is needed in order to unify the PCIe designware framework for ARM and > ARM64 architectures. In the PCIe designware unification process we are calling > pci_create_root_bus() passing a "sysdata" parameter that is the same for both > ARM and ARM64 and is of type "struct pcie_port*". In the ARM case this will > cause a problem with the function pcibios_align_resource(); in fact this will > cast "dev->sysdata" to "struct pci_sys_data*", whereas designware had passed a > "struct pcie_port*" pointer. > > This patch solves the issue by removing "align_resource" from "pci_sys_data" > struct and defining a static global function pointer in "bios32.c" > > Signed-off-by: Gabriele Paoloni <gabriele.paoloni at huawei.com> > Signed-off-by: Zhou Wang <wangzhou1@hisilicon.com> Can you fix up Gabriele's email address above (currently contains " at ") and verify that this sign-off chain is accurate per section 11 of Documentation/SubmittingPatches? The above suggests to me that Gabriele originally wrote this patch and Zhou is passing it along. That might well be true; I haven't followed the development, so I'm just double-checking. > --- > arch/arm/include/asm/mach/pci.h | 5 ----- > arch/arm/kernel/bios32.c | 12 ++++++++---- > 2 files changed, 8 insertions(+), 9 deletions(-) > > diff --git a/arch/arm/include/asm/mach/pci.h b/arch/arm/include/asm/mach/pci.h > index 28b9bb3..8a4e4de 100644 > --- a/arch/arm/include/asm/mach/pci.h > +++ b/arch/arm/include/asm/mach/pci.h > @@ -58,11 +58,6 @@ struct pci_sys_data { > /* IRQ mapping */ > int (*map_irq)(const struct pci_dev *, u8, u8); > /* Resource alignement requirements */ > - resource_size_t (*align_resource)(struct pci_dev *dev, > - const struct resource *res, > - resource_size_t start, > - resource_size_t size, > - resource_size_t align); > void *private_data; /* platform controller private data */ > }; > > diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c > index fcbbbb1..4cdc64d 100644 > --- a/arch/arm/kernel/bios32.c > +++ b/arch/arm/kernel/bios32.c > @@ -17,6 +17,11 @@ > #include <asm/mach/pci.h> > > static int debug_pci; > +static resource_size_t (*align_resource)(struct pci_dev *dev, > + const struct resource *res, > + resource_size_t start, > + resource_size_t size, > + resource_size_t align) = NULL; > > #ifdef CONFIG_PCI_MSI > struct msi_controller *pcibios_msi_controller(struct pci_dev *dev) > @@ -468,7 +473,7 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw, > sys->busnr = busnr; > sys->swizzle = hw->swizzle; > sys->map_irq = hw->map_irq; > - sys->align_resource = hw->align_resource; > + align_resource = hw->align_resource; > INIT_LIST_HEAD(&sys->resources); > > if (hw->private_data) > @@ -589,7 +594,6 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res, > resource_size_t size, resource_size_t align) > { > struct pci_dev *dev = data; > - struct pci_sys_data *sys = dev->sysdata; > resource_size_t start = res->start; > > if (res->flags & IORESOURCE_IO && start & 0x300) > @@ -597,8 +601,8 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res, > > start = (start + align - 1) & ~(align - 1); > > - if (sys->align_resource) > - return sys->align_resource(dev, res, start, size, align); > + if (align_resource) > + return align_resource(dev, res, start, size, align); > > return start; > } > -- > 1.9.1 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-pci" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 2015/7/22 6:44, Bjorn Helgaas wrote: > Hi Zhou & Gabriele, > > On Tue, Jul 21, 2015 at 02:48:39PM +0800, Zhou Wang wrote: >> This patch is needed in order to unify the PCIe designware framework for ARM and >> ARM64 architectures. In the PCIe designware unification process we are calling >> pci_create_root_bus() passing a "sysdata" parameter that is the same for both >> ARM and ARM64 and is of type "struct pcie_port*". In the ARM case this will >> cause a problem with the function pcibios_align_resource(); in fact this will >> cast "dev->sysdata" to "struct pci_sys_data*", whereas designware had passed a >> "struct pcie_port*" pointer. >> >> This patch solves the issue by removing "align_resource" from "pci_sys_data" >> struct and defining a static global function pointer in "bios32.c" >> >> Signed-off-by: Gabriele Paoloni <gabriele.paoloni at huawei.com> >> Signed-off-by: Zhou Wang <wangzhou1@hisilicon.com> > > Can you fix up Gabriele's email address above (currently contains " at ") > and verify that this sign-off chain is accurate per section 11 of > Documentation/SubmittingPatches? The above suggests to me that Gabriele > originally wrote this patch and Zhou is passing it along. That might well > be true; I haven't followed the development, so I'm just double-checking. > Hi Bjorn, Sorry about above mistake. Will change it in next version. Thanks for your reminding, Zhou >> --- >> arch/arm/include/asm/mach/pci.h | 5 ----- >> arch/arm/kernel/bios32.c | 12 ++++++++---- >> 2 files changed, 8 insertions(+), 9 deletions(-) >> >> diff --git a/arch/arm/include/asm/mach/pci.h b/arch/arm/include/asm/mach/pci.h >> index 28b9bb3..8a4e4de 100644 >> --- a/arch/arm/include/asm/mach/pci.h >> +++ b/arch/arm/include/asm/mach/pci.h >> @@ -58,11 +58,6 @@ struct pci_sys_data { >> /* IRQ mapping */ >> int (*map_irq)(const struct pci_dev *, u8, u8); >> /* Resource alignement requirements */ >> - resource_size_t (*align_resource)(struct pci_dev *dev, >> - const struct resource *res, >> - resource_size_t start, >> - resource_size_t size, >> - resource_size_t align); >> void *private_data; /* platform controller private data */ >> }; >> >> diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c >> index fcbbbb1..4cdc64d 100644 >> --- a/arch/arm/kernel/bios32.c >> +++ b/arch/arm/kernel/bios32.c >> @@ -17,6 +17,11 @@ >> #include <asm/mach/pci.h> >> >> static int debug_pci; >> +static resource_size_t (*align_resource)(struct pci_dev *dev, >> + const struct resource *res, >> + resource_size_t start, >> + resource_size_t size, >> + resource_size_t align) = NULL; >> >> #ifdef CONFIG_PCI_MSI >> struct msi_controller *pcibios_msi_controller(struct pci_dev *dev) >> @@ -468,7 +473,7 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw, >> sys->busnr = busnr; >> sys->swizzle = hw->swizzle; >> sys->map_irq = hw->map_irq; >> - sys->align_resource = hw->align_resource; >> + align_resource = hw->align_resource; >> INIT_LIST_HEAD(&sys->resources); >> >> if (hw->private_data) >> @@ -589,7 +594,6 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res, >> resource_size_t size, resource_size_t align) >> { >> struct pci_dev *dev = data; >> - struct pci_sys_data *sys = dev->sysdata; >> resource_size_t start = res->start; >> >> if (res->flags & IORESOURCE_IO && start & 0x300) >> @@ -597,8 +601,8 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res, >> >> start = (start + align - 1) & ~(align - 1); >> >> - if (sys->align_resource) >> - return sys->align_resource(dev, res, start, size, align); >> + if (align_resource) >> + return align_resource(dev, res, start, size, align); >> >> return start; >> } >> -- >> 1.9.1 >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-pci" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > . > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[CC'ing Thomas and Jason for pci-mvebu] On Tue, Jul 21, 2015 at 07:48:39AM +0100, Zhou Wang wrote: > This patch is needed in order to unify the PCIe designware framework for ARM and > ARM64 architectures. In the PCIe designware unification process we are calling > pci_create_root_bus() passing a "sysdata" parameter that is the same for both > ARM and ARM64 and is of type "struct pcie_port*". In the ARM case this will > cause a problem with the function pcibios_align_resource(); in fact this will > cast "dev->sysdata" to "struct pci_sys_data*", whereas designware had passed a > "struct pcie_port*" pointer. > > This patch solves the issue by removing "align_resource" from "pci_sys_data" > struct and defining a static global function pointer in "bios32.c" > > Signed-off-by: Gabriele Paoloni <gabriele.paoloni at huawei.com> > Signed-off-by: Zhou Wang <wangzhou1@hisilicon.com> Arnd, Rob any opinion on this ? It is really the last blocking bit to having common ARM/ARM64 drivers (and get rid of pci_sys_data) so I would like to get this sorted asap (having a global function pointer might be a temporary solution before moving it to the host bridge structure). Comments welcome. Thanks ! Lorenzo > --- > arch/arm/include/asm/mach/pci.h | 5 ----- > arch/arm/kernel/bios32.c | 12 ++++++++---- > 2 files changed, 8 insertions(+), 9 deletions(-) > > diff --git a/arch/arm/include/asm/mach/pci.h b/arch/arm/include/asm/mach/pci.h > index 28b9bb3..8a4e4de 100644 > --- a/arch/arm/include/asm/mach/pci.h > +++ b/arch/arm/include/asm/mach/pci.h > @@ -58,11 +58,6 @@ struct pci_sys_data { > /* IRQ mapping */ > int (*map_irq)(const struct pci_dev *, u8, u8); > /* Resource alignement requirements */ > - resource_size_t (*align_resource)(struct pci_dev *dev, > - const struct resource *res, > - resource_size_t start, > - resource_size_t size, > - resource_size_t align); > void *private_data; /* platform controller private data */ > }; > > diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c > index fcbbbb1..4cdc64d 100644 > --- a/arch/arm/kernel/bios32.c > +++ b/arch/arm/kernel/bios32.c > @@ -17,6 +17,11 @@ > #include <asm/mach/pci.h> > > static int debug_pci; > +static resource_size_t (*align_resource)(struct pci_dev *dev, > + const struct resource *res, > + resource_size_t start, > + resource_size_t size, > + resource_size_t align) = NULL; > > #ifdef CONFIG_PCI_MSI > struct msi_controller *pcibios_msi_controller(struct pci_dev *dev) > @@ -468,7 +473,7 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw, > sys->busnr = busnr; > sys->swizzle = hw->swizzle; > sys->map_irq = hw->map_irq; > - sys->align_resource = hw->align_resource; > + align_resource = hw->align_resource; > INIT_LIST_HEAD(&sys->resources); > > if (hw->private_data) > @@ -589,7 +594,6 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res, > resource_size_t size, resource_size_t align) > { > struct pci_dev *dev = data; > - struct pci_sys_data *sys = dev->sysdata; > resource_size_t start = res->start; > > if (res->flags & IORESOURCE_IO && start & 0x300) > @@ -597,8 +601,8 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res, > > start = (start + align - 1) & ~(align - 1); > > - if (sys->align_resource) > - return sys->align_resource(dev, res, start, size, align); > + if (align_resource) > + return align_resource(dev, res, start, size, align); > > return start; > } > -- > 1.9.1 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-pci" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/arm/include/asm/mach/pci.h b/arch/arm/include/asm/mach/pci.h index 28b9bb3..8a4e4de 100644 --- a/arch/arm/include/asm/mach/pci.h +++ b/arch/arm/include/asm/mach/pci.h @@ -58,11 +58,6 @@ struct pci_sys_data { /* IRQ mapping */ int (*map_irq)(const struct pci_dev *, u8, u8); /* Resource alignement requirements */ - resource_size_t (*align_resource)(struct pci_dev *dev, - const struct resource *res, - resource_size_t start, - resource_size_t size, - resource_size_t align); void *private_data; /* platform controller private data */ }; diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c index fcbbbb1..4cdc64d 100644 --- a/arch/arm/kernel/bios32.c +++ b/arch/arm/kernel/bios32.c @@ -17,6 +17,11 @@ #include <asm/mach/pci.h> static int debug_pci; +static resource_size_t (*align_resource)(struct pci_dev *dev, + const struct resource *res, + resource_size_t start, + resource_size_t size, + resource_size_t align) = NULL; #ifdef CONFIG_PCI_MSI struct msi_controller *pcibios_msi_controller(struct pci_dev *dev) @@ -468,7 +473,7 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw, sys->busnr = busnr; sys->swizzle = hw->swizzle; sys->map_irq = hw->map_irq; - sys->align_resource = hw->align_resource; + align_resource = hw->align_resource; INIT_LIST_HEAD(&sys->resources); if (hw->private_data) @@ -589,7 +594,6 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res, resource_size_t size, resource_size_t align) { struct pci_dev *dev = data; - struct pci_sys_data *sys = dev->sysdata; resource_size_t start = res->start; if (res->flags & IORESOURCE_IO && start & 0x300) @@ -597,8 +601,8 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res, start = (start + align - 1) & ~(align - 1); - if (sys->align_resource) - return sys->align_resource(dev, res, start, size, align); + if (align_resource) + return align_resource(dev, res, start, size, align); return start; }