> -----Original Message----- > From: Tanmay Inamdar [mailto:tinamdar@xxxxxxx] > Sent: Thursday, February 13, 2014 5:37 PM > To: Jingoo Han > Cc: Liviu Dudau; Arnd Bergmann; devicetree@xxxxxxxxxxxxxxx; linaro-kernel; linux-pci; Will Deacon; > LKML; Catalin Marinas; Bjorn Helgaas; LAKML > Subject: Re: [PATCH] pci: Add support for creating a generic host_bridge from device tree > > On Thu, Feb 13, 2014 at 12:10 AM, Jingoo Han <jg1.han@xxxxxxxxxxx> wrote: > > On Thursday, February 06, 2014 7:18 PM, Liviu Dudau wrote: > >> On Wed, Feb 05, 2014 at 10:26:27PM +0000, Tanmay Inamdar wrote: > >> > Hello Liviu, > >> > > >> > I did not get the first email of this particular patch on any of > >> > subscribed mailing lists (don't know why), hence replying here. > >> > >> Strange, it shows in the MARC and GMANE archive for linux-pci, probably > >> a hickup on your receiving side? > >> > >> > > >> > +struct pci_host_bridge * > >> > +pci_host_bridge_of_init(struct device *parent, int busno, struct pci_ops *ops, > >> > + void *host_data, struct list_head *resources) > >> > +{ > >> > + struct pci_bus *root_bus; > >> > + struct pci_host_bridge *bridge; > >> > + > >> > + /* first parse the host bridge bus ranges */ > >> > + if (pci_host_bridge_of_get_ranges(parent->of_node, resources)) > >> > + return NULL; > >> > + > >> > + /* then create the root bus */ > >> > + root_bus = pci_create_root_bus(parent, busno, ops, host_data, resources); > >> > + if (!root_bus) > >> > + return NULL; > >> > + > >> > + bridge = to_pci_host_bridge(root_bus->bridge); > >> > + > >> > + return bridge; > >> > +} > >> > > >> > You are keeping the domain_nr inside pci_host_bridge structure. In > >> > above API, domain_nr is required in 'pci_find_bus' function called > >> > from 'pci_create_root_bus'. Since the bridge is allocated after > >> > creating root bus, 'pci_find_bus' always gets domain_nr as 0. This > >> > will cause problem for scanning multiple domains. > >> > >> Good catch. I was switching between creating a pci_controller in arch/arm64 and > >> adding the needed bits in pci_host_bridge. After internal review I've decided to > >> add the domain_nr to pci_host_bridge, but forgot to update the code everywhere. > > > > Hi Liviu Dudau, > > > > One more thing, > > I am reviewing and compiling your patch. > > Would you consider adding 'struct pci_sys_data' and 'struct hw_pci'? > > > > Currently, 4 PCIe Host drivers (pci-mvebu.c, pci-tegra.c, > > pci-rcar-gen2.c, pcie-designware.c) are using 'struct pci_sys_data' > > and 'struct hw_pci' in their drivers. Without this, it makes build > > errors. > > > > In arm32, 'struct pci_sys_data' and 'struct hw_pci' is defined > > in "arch/arm/include/asm/mach/pci.h". > > > > Tanmay Inamdar, > > Your 'APM X-Gene PCIe' patch also needs 'struct pci_sys_data' and > > 'struct hw_pci'. With Liviu Dudau's patch, it will make build > > errors. Would you check this? > > X-Gene PCIe host driver is dependent on arm64 PCI patch. My previous > approach was based on 32bit arm PCI support. With Liviu's approach, I > will have to make changes in host driver to get rid of hw_pci and > pci_sys_data which are no longer required. I want to use 'drivers/pci/host/pcie-designware.c' for both arm32 and arm64, without any code changes. However, it looks impossible. I made 'drivers/pci/host/pcie-designware.c' based on 32bit arm PCI support. Then, with Liviu's patch, do I have to make new code for arm64, even though the same HW PCIe IP is used? - For arm32 drivers/pci/host/pcie-designware.c - For arm64 drivers/pci/host/pcie-designware-arm64.c > > IMO it should not cause build errors for PCI host drivers dependent on > architectures other than arm64. Can you post the error? > I post the build errors. CC drivers/pci/host/pcie-designware.o CHK kernel/config_data.h drivers/pci/host/pcie-designware.c:72:52: warning: 'struct pci_sys_data' declared inside parameter list [enabled by default] static inline struct pcie_port *sys_to_pcie(struct pci_sys_data *sys) ^ drivers/pci/host/pcie-designware.c:72:52: warning: its scope is only this definition or declaration, which is probably not what you want [enabled by default] drivers/pci/host/pcie-designware.c: In function 'sys_to_pcie' drivers/pci/host/pcie-designware.c:74:12: error: dereferencing pointer to incomplete type return sys->private_data; ^ drivers/pci/host/pcie-designware.c: In function 'dw_pcie_msi_map' drivers/pci/host/pcie-designware.c:384:2: error: implicit declaration of function 'set_irq_flags' [-Werror=implicit-function-declaration] set_irq_flags(irq, IRQF_VALID); ^ drivers/pci/host/pcie-designware.c:384:21: error: 'IRQF_VALID??undeclared (first use in this function) set_irq_flags(irq, IRQF_VALID); ^ drivers/pci/host/pcie-designware.c:384:21: note: each undeclared identifier is reported only once for each function it appears in drivers/pci/host/pcie-designware.c: In function 'dw_pcie_host_init' drivers/pci/host/pcie-designware.c:492:2: error: invalid use of undefined type 'struct hw_pci' dw_pci.nr_controllers = 1; ^ drivers/pci/host/pcie-designware.c:493:2: error: invalid use of undefined type 'struct hw_pci' dw_pci.private_data = (void **)&pp; ^ drivers/pci/host/pcie-designware.c:495:2: error: implicit declaration of function 'pci_common_init' [-Werror=implicit-function-declaration] pci_common_init(&dw_pci); ^ drivers/pci/host/pcie-designware.c:498:2: error: invalid use of undefined type 'struct hw_pci' dw_pci.domain++; ^ drivers/pci/host/pcie-designware.c: At top level: drivers/pci/host/pcie-designware.c:698:41: warning: 'struct pci_sys_data??declared inside parameter list [enabled by default] static int dw_pcie_setup(int nr, struct pci_sys_data *sys) ^ drivers/pci/host/pcie-designware.c: In function 'dw_pcie_setup' drivers/pci/host/pcie-designware.c:702:2: warning: passing argument 1 of 'sys_to_pcie' from incompatible pointer type [enabled by default] pp = sys_to_pcie(sys); ^ drivers/pci/host/pcie-designware.c:72:33: note: expected 'struct pci_sys_data *' but argument is of type 'struct pci_sys_data *' static inline struct pcie_port *sys_to_pcie(struct pci_sys_data *sys) ^ drivers/pci/host/pcie-designware.c:708:6: error: dereferencing pointer to incomplete type sys->io_offset = global_io_offset - pp->config.io_bus_addr; ^ drivers/pci/host/pcie-designware.c:711:31: error: dereferencing pointer to incomplete type pci_add_resource_offset(&sys->resources, &pp->io, ^ drivers/pci/host/pcie-designware.c:712:9: error: dereferencing pointer to incomplete type sys->io_offset); ^ drivers/pci/host/pcie-designware.c:715:5: error: dereferencing pointer to incomplete type sys->mem_offset = pp->mem.start - pp->config.mem_bus_addr; ^ drivers/pci/host/pcie-designware.c:716:30: error: dereferencing pointer to incomplete type pci_add_resource_offset(&sys->resources, &pp->mem, sys->mem_offset); ^ drivers/pci/host/pcie-designware.c:716:56: error: dereferencing pointer to incomplete type pci_add_resource_offset(&sys->resources, &pp->mem, sys->mem_offset); ^ drivers/pci/host/pcie-designware.c: At top level: drivers/pci/host/pcie-designware.c:721:56: warning: 'struct pci_sys_data' declared inside parameter list [enabled by default] static struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys) ^ drivers/pci/host/pcie-designware.c: In function 'dw_pcie_scan_bus' drivers/pci/host/pcie-designware.c:724:9: warning: passing argument 1 of 'sys_to_pcie' from incompatible pointer type [enabled by default] struct pcie_port *pp = sys_to_pcie(sys); ^ drivers/pci/host/pcie-designware.c:72:33: note: expected 'struct pci_sys_data *' but argument is of type 'sruct pci_sys_data *' static inline struct pcie_port *sys_to_pcie(struct pci_sys_data *sys) ^ drivers/pci/host/pcie-designware.c:727:24: error: dereferencing pointer to incomplete type pp->root_bus_nr = sys->busnr; ^ drivers/pci/host/pcie-designware.c:728:36: error: dereferencing pointer to incomplete type bus = pci_scan_root_bus(NULL, sys->busnr, &dw_pcie_ops, ^ drivers/pci/host/pcie-designware.c:729:15: error: dereferencing pointer to incomplete type sys, &sys->resources); ^ drivers/pci/host/pcie-designware.c: At top level: drivers/pci/host/pcie-designware.c:755:15: error: variable 'dw_pci' has initializer but incomplete type static struct hw_pci dw_pci = { ^ drivers/pci/host/pcie-designware.c:756:2: error: unknown field 'setup' specified in initializer .setup = dw_pcie_setup, ^ drivers/pci/host/pcie-designware.c:756:2: warning: excess elements in struct initializer [enabled by default] drivers/pci/host/pcie-designware.c:756:2: warning: (near initialization for 'dw_pci' [enabled by default] drivers/pci/host/pcie-designware.c:757:2: error: unknown field 'scan' specified in initializer .scan = dw_pcie_scan_bus, ^ drivers/pci/host/pcie-designware.c:757:2: warning: excess elements in struct initializer [enabled by default] drivers/pci/host/pcie-designware.c:757:2: warning: (near initialization for 'dw_pci' [enabled by default] drivers/pci/host/pcie-designware.c:758:2: error: unknown field 'map_irq' specified in initializer .map_irq = dw_pcie_map_irq, ^ drivers/pci/host/pcie-designware.c:758:2: warning: excess elements in struct initializer [enabled by default] drivers/pci/host/pcie-designware.c:758:2: warning: (near initialization for 'dw_pci' [enabled by default] drivers/pci/host/pcie-designware.c:759:2: error: unknown field 'add_bus' specified in initializer .add_bus = dw_pcie_add_bus, ^ drivers/pci/host/pcie-designware.c:759:2: warning: excess elements in struct initializer [enabled by default] drivers/pci/host/pcie-designware.c:759:2: warning: (near initialization for 'dw_pci' [enabled by default] cc1: some warnings being treated as errors make[3]: *** [drivers/pci/host/pcie-designware.o] Error 1 > > > >> > >> Thanks for reviewing this, will fix in v2. > >> > >> Do you find porting to the new API straight forward? > >> > > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
