| Message ID | 1452620173-4905-6-git-send-email-bharatku@xilinx.com |
|---|---|
| State | Changes Requested |
| Headers | show |
Ping > This patch does required modifications to microblaze PCI subsystem, to > work with generic driver (drivers/pci/host/pcie-xilinx.c) on Microblaze > and Zynq. > > Signed-off-by: Bharat Kumar Gogada <bharatku@xilinx.com> > Signed-off-by: Ravi Kiran Gummaluri <rgummal@xilinx.com> > --- > Changes: > Modified pcibios_fixup_bus in pci-common.c, as per generic architecuture. > Modified pcibios_align_resource in pci-common.c, as per generic > architecuture. > Modified pcibios_get_phb_of_node function in pci-common.c, to remove > dependency on struct pci_controller. > Removed pci_domain_nr in pci-common.c, instead using generic code. > Added pcibios_add_device in pci-common.c, as per generic architecuture. > Adding Kernel configuration in arch/microblaze as required for generic PCI > domains. > Added kernel configuration for driver to support Microblaze. > --- > arch/microblaze/Kconfig | 3 ++ > arch/microblaze/pci/pci-common.c | 61 +++++++++++++++-------------------- > ----- > drivers/pci/host/Kconfig | 2 +- > 3 files changed, 27 insertions(+), 39 deletions(-) > > diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig > index 0bce820..c3702b9 100644 > --- a/arch/microblaze/Kconfig > +++ b/arch/microblaze/Kconfig > @@ -271,6 +271,9 @@ config PCI > config PCI_DOMAINS > def_bool PCI > > +config PCI_DOMAINS_GENERIC > + def_bool PCI_DOMAINS > + > config PCI_SYSCALL > def_bool PCI > > diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci- > common.c > index ae838ed..bc72856 100644 > --- a/arch/microblaze/pci/pci-common.c > +++ b/arch/microblaze/pci/pci-common.c > @@ -123,17 +123,6 @@ unsigned long pci_address_to_pio(phys_addr_t > address) > } > EXPORT_SYMBOL_GPL(pci_address_to_pio); > > -/* > - * Return the domain number for this bus. > - */ > -int pci_domain_nr(struct pci_bus *bus) > -{ > - struct pci_controller *hose = pci_bus_to_host(bus); > - > - return hose->global_number; > -} > -EXPORT_SYMBOL(pci_domain_nr); > - > /* This routine is meant to be used early during boot, when the > * PCI bus numbers have not yet been assigned, and you need to > * issue PCI config cycles to an OF device. > @@ -863,26 +852,10 @@ void pcibios_setup_bus_devices(struct pci_bus > *bus) > > void pcibios_fixup_bus(struct pci_bus *bus) > { > - /* When called from the generic PCI probe, read PCI<->PCI bridge > - * bases. This is -not- called when generating the PCI tree from > - * the OF device-tree. > - */ > - if (bus->self != NULL) > - pci_read_bridge_bases(bus); > - > - /* Now fixup the bus bus */ > - pcibios_setup_bus_self(bus); > - > - /* Now fixup devices on that bus */ > - pcibios_setup_bus_devices(bus); > + /* nothing to do */ > } > EXPORT_SYMBOL(pcibios_fixup_bus); > > -static int skip_isa_ioresource_align(struct pci_dev *dev) > -{ > - return 0; > -} > - > /* > * We need to avoid collisions with `mirrored' VGA ports > * and other strange ISA hardware, so we always want the > @@ -899,20 +872,20 @@ static int skip_isa_ioresource_align(struct pci_dev > *dev) > 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; > resource_size_t start = res->start; > > - if (res->flags & IORESOURCE_IO) { > - if (skip_isa_ioresource_align(dev)) > - return start; > - if (start & 0x300) > - start = (start + 0x3ff) & ~0x3ff; > - } > - > return start; > } > EXPORT_SYMBOL(pcibios_align_resource); > > +int pcibios_add_device(struct pci_dev *dev) > +{ > + dev->irq = of_irq_parse_and_map_pci(dev, 0, 0); > + > + return 0; > +} > +EXPORT_SYMBOL(pcibios_add_device); > + > /* > * Reparent resource children of pr that conflict with res > * under res, and make res replace those children. > @@ -1335,9 +1308,21 @@ static void pcibios_setup_phb_resources(struct > pci_controller *hose, > > struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus) > { > - struct pci_controller *hose = bus->sysdata; > + struct device_node *np; > + > + for_each_node_by_type(np, "pci") { > + const void *prop; > + unsigned int bus_min; > + > + prop = of_get_property(np, "bus-range", NULL); > + if (!prop) > + continue; > + bus_min = be32_to_cpup(prop); > + if (bus->number == bus_min) > + return np; > + } > > - return of_node_get(hose->dn); > + return NULL; > } > > static void pcibios_scan_phb(struct pci_controller *hose) > diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig > index d5e58ba..7c56c2e 100644 > --- a/drivers/pci/host/Kconfig > +++ b/drivers/pci/host/Kconfig > @@ -79,7 +79,7 @@ config PCI_KEYSTONE > > config PCIE_XILINX > bool "Xilinx AXI PCIe host bridge support" > - depends on ARCH_ZYNQ > + depends on ARCH_ZYNQ || MICROBLAZE > help > Say 'Y' here if you want kernel to support the Xilinx AXI PCIe > Host Bridge driver. > -- > 2.1.1 -- 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
Hi Bharat, On Wed, Feb 03, 2016 at 03:40:21PM +0000, Bharat Kumar Gogada wrote: > Ping You said you were going to do another revision, so I'm waiting for r3. > > This patch does required modifications to microblaze PCI subsystem, to > > work with generic driver (drivers/pci/host/pcie-xilinx.c) on Microblaze > > and Zynq. > > > > Signed-off-by: Bharat Kumar Gogada <bharatku@xilinx.com> > > Signed-off-by: Ravi Kiran Gummaluri <rgummal@xilinx.com> > > --- > > Changes: > > Modified pcibios_fixup_bus in pci-common.c, as per generic architecuture. > > Modified pcibios_align_resource in pci-common.c, as per generic > > architecuture. > > Modified pcibios_get_phb_of_node function in pci-common.c, to remove > > dependency on struct pci_controller. > > Removed pci_domain_nr in pci-common.c, instead using generic code. > > Added pcibios_add_device in pci-common.c, as per generic architecuture. > > Adding Kernel configuration in arch/microblaze as required for generic PCI > > domains. > > Added kernel configuration for driver to support Microblaze. > > --- > > arch/microblaze/Kconfig | 3 ++ > > arch/microblaze/pci/pci-common.c | 61 +++++++++++++++-------------------- > > ----- > > drivers/pci/host/Kconfig | 2 +- > > 3 files changed, 27 insertions(+), 39 deletions(-) > > > > diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig > > index 0bce820..c3702b9 100644 > > --- a/arch/microblaze/Kconfig > > +++ b/arch/microblaze/Kconfig > > @@ -271,6 +271,9 @@ config PCI > > config PCI_DOMAINS > > def_bool PCI > > > > +config PCI_DOMAINS_GENERIC > > + def_bool PCI_DOMAINS > > + > > config PCI_SYSCALL > > def_bool PCI > > > > diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci- > > common.c > > index ae838ed..bc72856 100644 > > --- a/arch/microblaze/pci/pci-common.c > > +++ b/arch/microblaze/pci/pci-common.c > > @@ -123,17 +123,6 @@ unsigned long pci_address_to_pio(phys_addr_t > > address) > > } > > EXPORT_SYMBOL_GPL(pci_address_to_pio); > > > > -/* > > - * Return the domain number for this bus. > > - */ > > -int pci_domain_nr(struct pci_bus *bus) > > -{ > > - struct pci_controller *hose = pci_bus_to_host(bus); > > - > > - return hose->global_number; > > -} > > -EXPORT_SYMBOL(pci_domain_nr); > > - > > /* This routine is meant to be used early during boot, when the > > * PCI bus numbers have not yet been assigned, and you need to > > * issue PCI config cycles to an OF device. > > @@ -863,26 +852,10 @@ void pcibios_setup_bus_devices(struct pci_bus > > *bus) > > > > void pcibios_fixup_bus(struct pci_bus *bus) > > { > > - /* When called from the generic PCI probe, read PCI<->PCI bridge > > - * bases. This is -not- called when generating the PCI tree from > > - * the OF device-tree. > > - */ > > - if (bus->self != NULL) > > - pci_read_bridge_bases(bus); > > - > > - /* Now fixup the bus bus */ > > - pcibios_setup_bus_self(bus); > > - > > - /* Now fixup devices on that bus */ > > - pcibios_setup_bus_devices(bus); > > + /* nothing to do */ > > } > > EXPORT_SYMBOL(pcibios_fixup_bus); > > > > -static int skip_isa_ioresource_align(struct pci_dev *dev) > > -{ > > - return 0; > > -} > > - > > /* > > * We need to avoid collisions with `mirrored' VGA ports > > * and other strange ISA hardware, so we always want the > > @@ -899,20 +872,20 @@ static int skip_isa_ioresource_align(struct pci_dev > > *dev) > > 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; > > resource_size_t start = res->start; > > > > - if (res->flags & IORESOURCE_IO) { > > - if (skip_isa_ioresource_align(dev)) > > - return start; > > - if (start & 0x300) > > - start = (start + 0x3ff) & ~0x3ff; > > - } > > - > > return start; > > } > > EXPORT_SYMBOL(pcibios_align_resource); > > > > +int pcibios_add_device(struct pci_dev *dev) > > +{ > > + dev->irq = of_irq_parse_and_map_pci(dev, 0, 0); > > + > > + return 0; > > +} > > +EXPORT_SYMBOL(pcibios_add_device); > > + > > /* > > * Reparent resource children of pr that conflict with res > > * under res, and make res replace those children. > > @@ -1335,9 +1308,21 @@ static void pcibios_setup_phb_resources(struct > > pci_controller *hose, > > > > struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus) > > { > > - struct pci_controller *hose = bus->sysdata; > > + struct device_node *np; > > + > > + for_each_node_by_type(np, "pci") { > > + const void *prop; > > + unsigned int bus_min; > > + > > + prop = of_get_property(np, "bus-range", NULL); > > + if (!prop) > > + continue; > > + bus_min = be32_to_cpup(prop); > > + if (bus->number == bus_min) > > + return np; > > + } > > > > - return of_node_get(hose->dn); > > + return NULL; > > } > > > > static void pcibios_scan_phb(struct pci_controller *hose) > > diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig > > index d5e58ba..7c56c2e 100644 > > --- a/drivers/pci/host/Kconfig > > +++ b/drivers/pci/host/Kconfig > > @@ -79,7 +79,7 @@ config PCI_KEYSTONE > > > > config PCIE_XILINX > > bool "Xilinx AXI PCIe host bridge support" > > - depends on ARCH_ZYNQ > > + depends on ARCH_ZYNQ || MICROBLAZE > > help > > Say 'Y' here if you want kernel to support the Xilinx AXI PCIe > > Host Bridge driver. > > -- > > 2.1.1 > > -- > 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
> You said you were going to do another revision, so I'm waiting for r3. Hi Bjorn, Do you have any comments on this patch (5/5), I will address other patches comments along with this patch, if any, in v3. Bharat > > > > This patch does required modifications to microblaze PCI subsystem, > > > to work with generic driver (drivers/pci/host/pcie-xilinx.c) on > > > Microblaze and Zynq. > > > > > > Signed-off-by: Bharat Kumar Gogada <bharatku@xilinx.com> > > > Signed-off-by: Ravi Kiran Gummaluri <rgummal@xilinx.com> > > > --- > > > Changes: > > > Modified pcibios_fixup_bus in pci-common.c, as per generic > architecuture. > > > Modified pcibios_align_resource in pci-common.c, as per generic > > > architecuture. > > > Modified pcibios_get_phb_of_node function in pci-common.c, to > remove > > > dependency on struct pci_controller. > > > Removed pci_domain_nr in pci-common.c, instead using generic code. > > > Added pcibios_add_device in pci-common.c, as per generic > architecuture. > > > Adding Kernel configuration in arch/microblaze as required for > > > generic PCI domains. > > > Added kernel configuration for driver to support Microblaze. > > > --- > > > arch/microblaze/Kconfig | 3 ++ > > > arch/microblaze/pci/pci-common.c | 61 > > > +++++++++++++++-------------------- > > > ----- > > > drivers/pci/host/Kconfig | 2 +- > > > 3 files changed, 27 insertions(+), 39 deletions(-) > > > > > > diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index > > > 0bce820..c3702b9 100644 > > > --- a/arch/microblaze/Kconfig > > > +++ b/arch/microblaze/Kconfig > > > @@ -271,6 +271,9 @@ config PCI > > > config PCI_DOMAINS > > > def_bool PCI > > > > > > +config PCI_DOMAINS_GENERIC > > > + def_bool PCI_DOMAINS > > > + > > > config PCI_SYSCALL > > > def_bool PCI > > > > > > diff --git a/arch/microblaze/pci/pci-common.c > > > b/arch/microblaze/pci/pci- common.c index ae838ed..bc72856 100644 > > > --- a/arch/microblaze/pci/pci-common.c > > > +++ b/arch/microblaze/pci/pci-common.c > > > @@ -123,17 +123,6 @@ unsigned long pci_address_to_pio(phys_addr_t > > > address) > > > } > > > EXPORT_SYMBOL_GPL(pci_address_to_pio); > > > > > > -/* > > > - * Return the domain number for this bus. > > > - */ > > > -int pci_domain_nr(struct pci_bus *bus) -{ > > > - struct pci_controller *hose = pci_bus_to_host(bus); > > > - > > > - return hose->global_number; > > > -} > > > -EXPORT_SYMBOL(pci_domain_nr); > > > - > > > /* This routine is meant to be used early during boot, when the > > > * PCI bus numbers have not yet been assigned, and you need to > > > * issue PCI config cycles to an OF device. > > > @@ -863,26 +852,10 @@ void pcibios_setup_bus_devices(struct pci_bus > > > *bus) > > > > > > void pcibios_fixup_bus(struct pci_bus *bus) { > > > - /* When called from the generic PCI probe, read PCI<->PCI bridge > > > - * bases. This is -not- called when generating the PCI tree from > > > - * the OF device-tree. > > > - */ > > > - if (bus->self != NULL) > > > - pci_read_bridge_bases(bus); > > > - > > > - /* Now fixup the bus bus */ > > > - pcibios_setup_bus_self(bus); > > > - > > > - /* Now fixup devices on that bus */ > > > - pcibios_setup_bus_devices(bus); > > > + /* nothing to do */ > > > } > > > EXPORT_SYMBOL(pcibios_fixup_bus); > > > > > > -static int skip_isa_ioresource_align(struct pci_dev *dev) -{ > > > - return 0; > > > -} > > > - > > > /* > > > * We need to avoid collisions with `mirrored' VGA ports > > > * and other strange ISA hardware, so we always want the @@ -899,20 > > > +872,20 @@ static int skip_isa_ioresource_align(struct pci_dev > > > *dev) > > > 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; > > > resource_size_t start = res->start; > > > > > > - if (res->flags & IORESOURCE_IO) { > > > - if (skip_isa_ioresource_align(dev)) > > > - return start; > > > - if (start & 0x300) > > > - start = (start + 0x3ff) & ~0x3ff; > > > - } > > > - > > > return start; > > > } > > > EXPORT_SYMBOL(pcibios_align_resource); > > > > > > +int pcibios_add_device(struct pci_dev *dev) { > > > + dev->irq = of_irq_parse_and_map_pci(dev, 0, 0); > > > + > > > + return 0; > > > +} > > > +EXPORT_SYMBOL(pcibios_add_device); > > > + > > > /* > > > * Reparent resource children of pr that conflict with res > > > * under res, and make res replace those children. > > > @@ -1335,9 +1308,21 @@ static void > > > pcibios_setup_phb_resources(struct > > > pci_controller *hose, > > > > > > struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus) { > > > - struct pci_controller *hose = bus->sysdata; > > > + struct device_node *np; > > > + > > > + for_each_node_by_type(np, "pci") { > > > + const void *prop; > > > + unsigned int bus_min; > > > + > > > + prop = of_get_property(np, "bus-range", NULL); > > > + if (!prop) > > > + continue; > > > + bus_min = be32_to_cpup(prop); > > > + if (bus->number == bus_min) > > > + return np; > > > + } > > > > > > - return of_node_get(hose->dn); > > > + return NULL; > > > } > > > > > > static void pcibios_scan_phb(struct pci_controller *hose) diff > > > --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig index > > > d5e58ba..7c56c2e 100644 > > > --- a/drivers/pci/host/Kconfig > > > +++ b/drivers/pci/host/Kconfig > > > @@ -79,7 +79,7 @@ config PCI_KEYSTONE > > > > > > config PCIE_XILINX > > > bool "Xilinx AXI PCIe host bridge support" > > > - depends on ARCH_ZYNQ > > > + depends on ARCH_ZYNQ || MICROBLAZE > > > help > > > Say 'Y' here if you want kernel to support the Xilinx AXI PCIe > > > Host Bridge driver. > > > -- > > > 2.1.1 > > > > -- > > 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 Ben, pcibios_get_phb_of_node() question] On Tue, Jan 12, 2016 at 11:06:13PM +0530, Bharat Kumar Gogada wrote: > This patch does required modifications to microblaze PCI subsystem, to > work with generic driver (drivers/pci/host/pcie-xilinx.c) on Microblaze > and Zynq. > > Signed-off-by: Bharat Kumar Gogada <bharatku@xilinx.com> > Signed-off-by: Ravi Kiran Gummaluri <rgummal@xilinx.com> >... > 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; > resource_size_t start = res->start; > > - if (res->flags & IORESOURCE_IO) { > - if (skip_isa_ioresource_align(dev)) > - return start; > - if (start & 0x300) > - start = (start + 0x3ff) & ~0x3ff; > - } > - > return start; "return res->start;" is sufficient; no need for a temporary variable. > } > EXPORT_SYMBOL(pcibios_align_resource); > > +int pcibios_add_device(struct pci_dev *dev) > +{ > + dev->irq = of_irq_parse_and_map_pci(dev, 0, 0); > + > + return 0; > +} > +EXPORT_SYMBOL(pcibios_add_device); > + > /* > * Reparent resource children of pr that conflict with res > * under res, and make res replace those children. > @@ -1335,9 +1308,21 @@ static void pcibios_setup_phb_resources(struct pci_controller *hose, > > struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus) > { > - struct pci_controller *hose = bus->sysdata; > + struct device_node *np; > + > + for_each_node_by_type(np, "pci") { > + const void *prop; > + unsigned int bus_min; > + > + prop = of_get_property(np, "bus-range", NULL); > + if (!prop) > + continue; > + bus_min = be32_to_cpup(prop); > + if (bus->number == bus_min) > + return np; > + } > > - return of_node_get(hose->dn); > + return NULL; Hmmm. The old microblaze code ("return of_node_get(hose->dn);") is basically the same as the mips and powerpc versions. The new code is basically the same as the x86 version. I like the generic weak version in drivers/pci/of.c because it doesn't use any arch-specific data, and it looks like if we just set the struct device.of_node members correctly, everything should Just Work. But Ben added both the generic and the x86 versions the same day, so there must be some complication: 98d9f30c820d ("pci/of: Match PCI devices to OF nodes dynamically") 3d5fe5a65af9 ("x86/devicetree: Use generic PCI <-> OF matching") So I guess my question is, why do we need a microblaze-specific version at all? Bjorn -- 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 Ben for real this time] On Wed, Feb 03, 2016 at 10:32:07AM -0600, Bjorn Helgaas wrote: > [+cc Ben, pcibios_get_phb_of_node() question] > > On Tue, Jan 12, 2016 at 11:06:13PM +0530, Bharat Kumar Gogada wrote: > > This patch does required modifications to microblaze PCI subsystem, to > > work with generic driver (drivers/pci/host/pcie-xilinx.c) on Microblaze > > and Zynq. > > > > Signed-off-by: Bharat Kumar Gogada <bharatku@xilinx.com> > > Signed-off-by: Ravi Kiran Gummaluri <rgummal@xilinx.com> > >... > > > 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; > > resource_size_t start = res->start; > > > > - if (res->flags & IORESOURCE_IO) { > > - if (skip_isa_ioresource_align(dev)) > > - return start; > > - if (start & 0x300) > > - start = (start + 0x3ff) & ~0x3ff; > > - } > > - > > return start; > > "return res->start;" is sufficient; no need for a temporary variable. > > > } > > EXPORT_SYMBOL(pcibios_align_resource); > > > > +int pcibios_add_device(struct pci_dev *dev) > > +{ > > + dev->irq = of_irq_parse_and_map_pci(dev, 0, 0); > > + > > + return 0; > > +} > > +EXPORT_SYMBOL(pcibios_add_device); > > + > > /* > > * Reparent resource children of pr that conflict with res > > * under res, and make res replace those children. > > @@ -1335,9 +1308,21 @@ static void pcibios_setup_phb_resources(struct pci_controller *hose, > > > > struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus) > > { > > - struct pci_controller *hose = bus->sysdata; > > + struct device_node *np; > > + > > + for_each_node_by_type(np, "pci") { > > + const void *prop; > > + unsigned int bus_min; > > + > > + prop = of_get_property(np, "bus-range", NULL); > > + if (!prop) > > + continue; > > + bus_min = be32_to_cpup(prop); > > + if (bus->number == bus_min) > > + return np; > > + } > > > > - return of_node_get(hose->dn); > > + return NULL; > > Hmmm. The old microblaze code ("return of_node_get(hose->dn);") is > basically the same as the mips and powerpc versions. The new code is > basically the same as the x86 version. > > I like the generic weak version in drivers/pci/of.c because it doesn't > use any arch-specific data, and it looks like if we just set the > struct device.of_node members correctly, everything should Just Work. > > But Ben added both the generic and the x86 versions the same day, so > there must be some complication: > > 98d9f30c820d ("pci/of: Match PCI devices to OF nodes dynamically") > 3d5fe5a65af9 ("x86/devicetree: Use generic PCI <-> OF matching") > > So I guess my question is, why do we need a microblaze-specific > version at all? > > Bjorn > -- > 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
> Subject: Re: [PATCH V2 5/5] Microblaze: Modifying microblaze PCI subsytem > to support generic Xilinx AXI PCIe Host Bridge IP driver > > [+cc Ben for real this time] > > On Wed, Feb 03, 2016 at 10:32:07AM -0600, Bjorn Helgaas wrote: > > [+cc Ben, pcibios_get_phb_of_node() question] > > > > On Tue, Jan 12, 2016 at 11:06:13PM +0530, Bharat Kumar Gogada wrote: > > > This patch does required modifications to microblaze PCI subsystem, > > > to work with generic driver (drivers/pci/host/pcie-xilinx.c) on > > > Microblaze and Zynq. > > > > > > Signed-off-by: Bharat Kumar Gogada <bharatku@xilinx.com> > > > Signed-off-by: Ravi Kiran Gummaluri <rgummal@xilinx.com> ... > > > > > 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; > > > resource_size_t start = res->start; > > > > > > - if (res->flags & IORESOURCE_IO) { > > > - if (skip_isa_ioresource_align(dev)) > > > - return start; > > > - if (start & 0x300) > > > - start = (start + 0x3ff) & ~0x3ff; > > > - } > > > - > > > return start; > > > > "return res->start;" is sufficient; no need for a temporary variable. > > Agreed will address in next patch. > > > } > > > EXPORT_SYMBOL(pcibios_align_resource); > > > > > > +int pcibios_add_device(struct pci_dev *dev) { > > > + dev->irq = of_irq_parse_and_map_pci(dev, 0, 0); > > > + > > > + return 0; > > > +} > > > +EXPORT_SYMBOL(pcibios_add_device); > > > + > > > /* > > > * Reparent resource children of pr that conflict with res > > > * under res, and make res replace those children. > > > @@ -1335,9 +1308,21 @@ static void > > > pcibios_setup_phb_resources(struct pci_controller *hose, > > > > > > struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus) { > > > - struct pci_controller *hose = bus->sysdata; > > > + struct device_node *np; > > > + > > > + for_each_node_by_type(np, "pci") { > > > + const void *prop; > > > + unsigned int bus_min; > > > + > > > + prop = of_get_property(np, "bus-range", NULL); > > > + if (!prop) > > > + continue; > > > + bus_min = be32_to_cpup(prop); > > > + if (bus->number == bus_min) > > > + return np; > > > + } > > > > > > - return of_node_get(hose->dn); > > > + return NULL; > > > > Hmmm. The old microblaze code ("return of_node_get(hose->dn);") is > > basically the same as the mips and powerpc versions. The new code is > > basically the same as the x86 version. > > > > I like the generic weak version in drivers/pci/of.c because it doesn't > > use any arch-specific data, and it looks like if we just set the > > struct device.of_node members correctly, everything should Just Work. > > > > But Ben added both the generic and the x86 versions the same day, so > > there must be some complication: > > > > 98d9f30c820d ("pci/of: Match PCI devices to OF nodes dynamically") > > 3d5fe5a65af9 ("x86/devicetree: Use generic PCI <-> OF matching") > > > > So I guess my question is, why do we need a microblaze-specific > > version at all? > > I did not notice the weak version in /pci/of.c, I have tested with weak version also and it is working. We might not need this microblaze specific version, but will wait for ben's reply. Bharat -- 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 Thu, Feb 04, 2016 at 05:49:20AM +0000, Bharat Kumar Gogada wrote: > > Subject: Re: [PATCH V2 5/5] Microblaze: Modifying microblaze PCI subsytem > > to support generic Xilinx AXI PCIe Host Bridge IP driver > > > > [+cc Ben for real this time] > > > > On Wed, Feb 03, 2016 at 10:32:07AM -0600, Bjorn Helgaas wrote: > > > [+cc Ben, pcibios_get_phb_of_node() question] > > > > > > On Tue, Jan 12, 2016 at 11:06:13PM +0530, Bharat Kumar Gogada wrote: > > > > This patch does required modifications to microblaze PCI subsystem, > > > > to work with generic driver (drivers/pci/host/pcie-xilinx.c) on > > > > Microblaze and Zynq. > > > > > > > > Signed-off-by: Bharat Kumar Gogada <bharatku@xilinx.com> > > > > Signed-off-by: Ravi Kiran Gummaluri <rgummal@xilinx.com> ... > > > > > > > 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; > > > > resource_size_t start = res->start; > > > > > > > > - if (res->flags & IORESOURCE_IO) { > > > > - if (skip_isa_ioresource_align(dev)) > > > > - return start; > > > > - if (start & 0x300) > > > > - start = (start + 0x3ff) & ~0x3ff; > > > > - } > > > > - > > > > return start; > > > > > > "return res->start;" is sufficient; no need for a temporary variable. > > > > Agreed will address in next patch. > > > > } > > > > EXPORT_SYMBOL(pcibios_align_resource); > > > > > > > > +int pcibios_add_device(struct pci_dev *dev) { > > > > + dev->irq = of_irq_parse_and_map_pci(dev, 0, 0); > > > > + > > > > + return 0; > > > > +} > > > > +EXPORT_SYMBOL(pcibios_add_device); > > > > + > > > > /* > > > > * Reparent resource children of pr that conflict with res > > > > * under res, and make res replace those children. > > > > @@ -1335,9 +1308,21 @@ static void > > > > pcibios_setup_phb_resources(struct pci_controller *hose, > > > > > > > > struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus) { > > > > - struct pci_controller *hose = bus->sysdata; > > > > + struct device_node *np; > > > > + > > > > + for_each_node_by_type(np, "pci") { > > > > + const void *prop; > > > > + unsigned int bus_min; > > > > + > > > > + prop = of_get_property(np, "bus-range", NULL); > > > > + if (!prop) > > > > + continue; > > > > + bus_min = be32_to_cpup(prop); > > > > + if (bus->number == bus_min) > > > > + return np; > > > > + } > > > > > > > > - return of_node_get(hose->dn); > > > > + return NULL; > > > > > > Hmmm. The old microblaze code ("return of_node_get(hose->dn);") is > > > basically the same as the mips and powerpc versions. The new code is > > > basically the same as the x86 version. > > > > > > I like the generic weak version in drivers/pci/of.c because it doesn't > > > use any arch-specific data, and it looks like if we just set the > > > struct device.of_node members correctly, everything should Just Work. > > > > > > But Ben added both the generic and the x86 versions the same day, so > > > there must be some complication: > > > > > > 98d9f30c820d ("pci/of: Match PCI devices to OF nodes dynamically") > > > 3d5fe5a65af9 ("x86/devicetree: Use generic PCI <-> OF matching") > > > > > > So I guess my question is, why do we need a microblaze-specific > > > version at all? > > > > I did not notice the weak version in /pci/of.c, I have tested with > weak version also and it is working. We might not need this > microblaze specific version, but will wait for ben's reply. If the generic version works, and you don't need the microblaze- specific version, just remove it and we'll get this wrapped up. No need to wait for Ben. Bjorn -- 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
> Subject: Re: [PATCH V2 5/5] Microblaze: Modifying microblaze PCI subsytem > to support generic Xilinx AXI PCIe Host Bridge IP driver > > On Thu, Feb 04, 2016 at 05:49:20AM +0000, Bharat Kumar Gogada wrote: > > > Subject: Re: [PATCH V2 5/5] Microblaze: Modifying microblaze PCI > > > subsytem to support generic Xilinx AXI PCIe Host Bridge IP driver > > > > > > [+cc Ben for real this time] > > > > > > On Wed, Feb 03, 2016 at 10:32:07AM -0600, Bjorn Helgaas wrote: > > > > [+cc Ben, pcibios_get_phb_of_node() question] > > > > > > > > On Tue, Jan 12, 2016 at 11:06:13PM +0530, Bharat Kumar Gogada wrote: > > > > > This patch does required modifications to microblaze PCI > > > > > subsystem, to work with generic driver > > > > > (drivers/pci/host/pcie-xilinx.c) on Microblaze and Zynq. > > > > > > > > > > Signed-off-by: Bharat Kumar Gogada <bharatku@xilinx.com> > > > > > Signed-off-by: Ravi Kiran Gummaluri <rgummal@xilinx.com> ... > > > > > > > > > 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; > > > > > resource_size_t start = res->start; > > > > > > > > > > - if (res->flags & IORESOURCE_IO) { > > > > > - if (skip_isa_ioresource_align(dev)) > > > > > - return start; > > > > > - if (start & 0x300) > > > > > - start = (start + 0x3ff) & ~0x3ff; > > > > > - } > > > > > - > > > > > return start; > > > > > > > > "return res->start;" is sufficient; no need for a temporary variable. > > > > > > Agreed will address in next patch. > > > > > } > > > > > EXPORT_SYMBOL(pcibios_align_resource); > > > > > > > > > > +int pcibios_add_device(struct pci_dev *dev) { > > > > > + dev->irq = of_irq_parse_and_map_pci(dev, 0, 0); > > > > > + > > > > > + return 0; > > > > > +} > > > > > +EXPORT_SYMBOL(pcibios_add_device); > > > > > + > > > > > /* > > > > > * Reparent resource children of pr that conflict with res > > > > > * under res, and make res replace those children. > > > > > @@ -1335,9 +1308,21 @@ static void > > > > > pcibios_setup_phb_resources(struct pci_controller *hose, > > > > > > > > > > struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus) > { > > > > > - struct pci_controller *hose = bus->sysdata; > > > > > + struct device_node *np; > > > > > + > > > > > + for_each_node_by_type(np, "pci") { > > > > > + const void *prop; > > > > > + unsigned int bus_min; > > > > > + > > > > > + prop = of_get_property(np, "bus-range", NULL); > > > > > + if (!prop) > > > > > + continue; > > > > > + bus_min = be32_to_cpup(prop); > > > > > + if (bus->number == bus_min) > > > > > + return np; > > > > > + } > > > > > > > > > > - return of_node_get(hose->dn); > > > > > + return NULL; > > > > > > > > Hmmm. The old microblaze code ("return of_node_get(hose->dn);") > > > > is basically the same as the mips and powerpc versions. The new > > > > code is basically the same as the x86 version. > > > > > > > > I like the generic weak version in drivers/pci/of.c because it > > > > doesn't use any arch-specific data, and it looks like if we just > > > > set the struct device.of_node members correctly, everything should > Just Work. > > > > > > > > But Ben added both the generic and the x86 versions the same day, > > > > so there must be some complication: > > > > > > > > 98d9f30c820d ("pci/of: Match PCI devices to OF nodes dynamically") > > > > 3d5fe5a65af9 ("x86/devicetree: Use generic PCI <-> OF matching") > > > > > > > > So I guess my question is, why do we need a microblaze-specific > > > > version at all? > > > > > > I did not notice the weak version in /pci/of.c, I have tested with > > weak version also and it is working. We might not need this > > microblaze specific version, but will wait for ben's reply. > > If the generic version works, and you don't need the microblaze- specific > version, just remove it and we'll get this wrapped up. No need to wait for > Ben. > Ok Bjorn, I will remove it and send next series of patches. Bharat -- 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/microblaze/Kconfig b/arch/microblaze/Kconfig index 0bce820..c3702b9 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -271,6 +271,9 @@ config PCI config PCI_DOMAINS def_bool PCI +config PCI_DOMAINS_GENERIC + def_bool PCI_DOMAINS + config PCI_SYSCALL def_bool PCI diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c index ae838ed..bc72856 100644 --- a/arch/microblaze/pci/pci-common.c +++ b/arch/microblaze/pci/pci-common.c @@ -123,17 +123,6 @@ unsigned long pci_address_to_pio(phys_addr_t address) } EXPORT_SYMBOL_GPL(pci_address_to_pio); -/* - * Return the domain number for this bus. - */ -int pci_domain_nr(struct pci_bus *bus) -{ - struct pci_controller *hose = pci_bus_to_host(bus); - - return hose->global_number; -} -EXPORT_SYMBOL(pci_domain_nr); - /* This routine is meant to be used early during boot, when the * PCI bus numbers have not yet been assigned, and you need to * issue PCI config cycles to an OF device. @@ -863,26 +852,10 @@ void pcibios_setup_bus_devices(struct pci_bus *bus) void pcibios_fixup_bus(struct pci_bus *bus) { - /* When called from the generic PCI probe, read PCI<->PCI bridge - * bases. This is -not- called when generating the PCI tree from - * the OF device-tree. - */ - if (bus->self != NULL) - pci_read_bridge_bases(bus); - - /* Now fixup the bus bus */ - pcibios_setup_bus_self(bus); - - /* Now fixup devices on that bus */ - pcibios_setup_bus_devices(bus); + /* nothing to do */ } EXPORT_SYMBOL(pcibios_fixup_bus); -static int skip_isa_ioresource_align(struct pci_dev *dev) -{ - return 0; -} - /* * We need to avoid collisions with `mirrored' VGA ports * and other strange ISA hardware, so we always want the @@ -899,20 +872,20 @@ static int skip_isa_ioresource_align(struct pci_dev *dev) 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; resource_size_t start = res->start; - if (res->flags & IORESOURCE_IO) { - if (skip_isa_ioresource_align(dev)) - return start; - if (start & 0x300) - start = (start + 0x3ff) & ~0x3ff; - } - return start; } EXPORT_SYMBOL(pcibios_align_resource); +int pcibios_add_device(struct pci_dev *dev) +{ + dev->irq = of_irq_parse_and_map_pci(dev, 0, 0); + + return 0; +} +EXPORT_SYMBOL(pcibios_add_device); + /* * Reparent resource children of pr that conflict with res * under res, and make res replace those children. @@ -1335,9 +1308,21 @@ static void pcibios_setup_phb_resources(struct pci_controller *hose, struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus) { - struct pci_controller *hose = bus->sysdata; + struct device_node *np; + + for_each_node_by_type(np, "pci") { + const void *prop; + unsigned int bus_min; + + prop = of_get_property(np, "bus-range", NULL); + if (!prop) + continue; + bus_min = be32_to_cpup(prop); + if (bus->number == bus_min) + return np; + } - return of_node_get(hose->dn); + return NULL; } static void pcibios_scan_phb(struct pci_controller *hose) diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig index d5e58ba..7c56c2e 100644 --- a/drivers/pci/host/Kconfig +++ b/drivers/pci/host/Kconfig @@ -79,7 +79,7 @@ config PCI_KEYSTONE config PCIE_XILINX bool "Xilinx AXI PCIe host bridge support" - depends on ARCH_ZYNQ + depends on ARCH_ZYNQ || MICROBLAZE help Say 'Y' here if you want kernel to support the Xilinx AXI PCIe Host Bridge driver.