From 97b3cf050b467dda571943ceadff5452bed04549 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Sun, 11 Mar 2007 16:42:53 -0700 Subject: [PATCH] [SPARC64]: Add dummy host controller to root of all PCI domains. We fake up a dummy one in all cases because that is the simplest thing to do and it happens to be necessary for hypervisor systems. Signed-off-by: David S. Miller --- arch/sparc64/kernel/pci.c | 119 +++++++++++++++++++++++-------- arch/sparc64/kernel/pci_impl.h | 9 +++ arch/sparc64/kernel/pci_psycho.c | 7 ++ arch/sparc64/kernel/pci_sabre.c | 12 ++++ arch/sparc64/kernel/pci_schizo.c | 6 ++ arch/sparc64/kernel/pci_sun4v.c | 6 ++ 6 files changed, 129 insertions(+), 30 deletions(-) diff --git a/arch/sparc64/kernel/pci.c b/arch/sparc64/kernel/pci.c index 914a216da339..ec5f85b030ef 100644 --- a/arch/sparc64/kernel/pci.c +++ b/arch/sparc64/kernel/pci.c @@ -368,7 +368,8 @@ static void pci_parse_of_addrs(struct of_device *op, struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm, struct device_node *node, - struct pci_bus *bus, int devfn) + struct pci_bus *bus, int devfn, + int host_controller) { struct dev_archdata *sd; struct pci_dev *dev; @@ -400,47 +401,62 @@ struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm, dev->devfn = devfn; dev->multifunction = 0; /* maybe a lie? */ - dev->vendor = of_getintprop_default(node, "vendor-id", 0xffff); - dev->device = of_getintprop_default(node, "device-id", 0xffff); - dev->subsystem_vendor = - of_getintprop_default(node, "subsystem-vendor-id", 0); - dev->subsystem_device = - of_getintprop_default(node, "subsystem-id", 0); - - dev->cfg_size = pci_cfg_space_size(dev); - + if (host_controller) { + dev->vendor = 0x108e; + dev->device = 0x8000; + dev->subsystem_vendor = 0x0000; + dev->subsystem_device = 0x0000; + dev->cfg_size = 256; + } else { + dev->vendor = of_getintprop_default(node, "vendor-id", 0xffff); + dev->device = of_getintprop_default(node, "device-id", 0xffff); + dev->subsystem_vendor = + of_getintprop_default(node, "subsystem-vendor-id", 0); + dev->subsystem_device = + of_getintprop_default(node, "subsystem-id", 0); + + dev->cfg_size = pci_cfg_space_size(dev); + } sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus), dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn)); - /* dev->class = of_getintprop_default(node, "class-code", 0); */ - /* We can't actually use the firmware value, we have to read what - * is in the register right now. One reason is that in the case - * of IDE interfaces the firmware can sample the value before the - * the IDE interface is programmed into native mode. - */ - pci_read_config_dword(dev, PCI_CLASS_REVISION, &class); - dev->class = class >> 8; - + if (host_controller) { + dev->class = PCI_CLASS_BRIDGE_HOST << 8; + } else { + /* We can't actually use the firmware value, we have + * to read what is in the register right now. One + * reason is that in the case of IDE interfaces the + * firmware can sample the value before the the IDE + * interface is programmed into native mode. + */ + pci_read_config_dword(dev, PCI_CLASS_REVISION, &class); + dev->class = class >> 8; + } printk(" class: 0x%x\n", dev->class); dev->current_state = 4; /* unknown power state */ dev->error_state = pci_channel_io_normal; - if (!strcmp(type, "pci") || !strcmp(type, "pciex")) { - /* a PCI-PCI bridge */ + if (host_controller) { dev->hdr_type = PCI_HEADER_TYPE_BRIDGE; dev->rom_base_reg = PCI_ROM_ADDRESS1; - } else if (!strcmp(type, "cardbus")) { - dev->hdr_type = PCI_HEADER_TYPE_CARDBUS; + dev->irq = PCI_IRQ_NONE; } else { - dev->hdr_type = PCI_HEADER_TYPE_NORMAL; - dev->rom_base_reg = PCI_ROM_ADDRESS; + if (!strcmp(type, "pci") || !strcmp(type, "pciex")) { + /* a PCI-PCI bridge */ + dev->hdr_type = PCI_HEADER_TYPE_BRIDGE; + dev->rom_base_reg = PCI_ROM_ADDRESS1; + } else if (!strcmp(type, "cardbus")) { + dev->hdr_type = PCI_HEADER_TYPE_CARDBUS; + } else { + dev->hdr_type = PCI_HEADER_TYPE_NORMAL; + dev->rom_base_reg = PCI_ROM_ADDRESS; - dev->irq = sd->op->irqs[0]; - if (dev->irq == 0xffffffff) - dev->irq = PCI_IRQ_NONE; + dev->irq = sd->op->irqs[0]; + if (dev->irq == 0xffffffff) + dev->irq = PCI_IRQ_NONE; + } } - pci_parse_of_addrs(sd->op, node, dev); printk(" adding to system ...\n"); @@ -632,7 +648,7 @@ static void __init pci_of_scan_bus(struct pci_pbm_info *pbm, devfn = (reg[0] >> 8) & 0xff; /* create a new pci_dev for this device */ - dev = of_create_pci_dev(pbm, child, bus, devfn); + dev = of_create_pci_dev(pbm, child, bus, devfn, 0); if (!dev) continue; printk("PCI: dev header type: %x\n", dev->hdr_type); @@ -677,10 +693,49 @@ static void __devinit pci_bus_register_of_sysfs(struct pci_bus *bus) pci_bus_register_of_sysfs(child_bus); } +int pci_host_bridge_read_pci_cfg(struct pci_bus *bus_dev, + unsigned int devfn, + int where, int size, + u32 *value) +{ + static u8 fake_pci_config[] = { + 0x8e, 0x10, /* Vendor: 0x108e (Sun) */ + 0x00, 0x80, /* Device: 0x8000 (PBM) */ + 0x46, 0x01, /* Command: 0x0146 (SERR, PARITY, MASTER, MEM) */ + 0xa0, 0x22, /* Status: 0x02a0 (DEVSEL_MED, FB2B, 66MHZ) */ + 0x00, 0x00, 0x00, 0x06, /* Class: 0x06000000 host bridge */ + 0x00, /* Cacheline: 0x00 */ + 0x40, /* Latency: 0x40 */ + 0x00, /* Header-Type: 0x00 normal */ + }; + + *value = 0; + if (where >= 0 && where < sizeof(fake_pci_config) && + (where + size) >= 0 && + (where + size) < sizeof(fake_pci_config) && + size <= sizeof(u32)) { + while (size--) { + *value <<= 8; + *value |= fake_pci_config[where + size]; + } + } + + return PCIBIOS_SUCCESSFUL; +} + +int pci_host_bridge_write_pci_cfg(struct pci_bus *bus_dev, + unsigned int devfn, + int where, int size, + u32 value) +{ + return PCIBIOS_SUCCESSFUL; +} + struct pci_bus * __init pci_scan_one_pbm(struct pci_pbm_info *pbm) { struct pci_controller_info *p = pbm->parent; struct device_node *node = pbm->prom_node; + struct pci_dev *host_pdev; struct pci_bus *bus; printk("PCI: Scanning PBM %s\n", node->full_name); @@ -698,6 +753,10 @@ struct pci_bus * __init pci_scan_one_pbm(struct pci_pbm_info *pbm) bus->resource[0] = &pbm->io_space; bus->resource[1] = &pbm->mem_space; + /* Create the dummy host bridge and link it in. */ + host_pdev = of_create_pci_dev(pbm, node, bus, 0x00, 1); + bus->self = host_pdev; + pci_of_scan_bus(pbm, node, bus); pci_bus_add_devices(bus); pci_bus_register_of_sysfs(bus); diff --git a/arch/sparc64/kernel/pci_impl.h b/arch/sparc64/kernel/pci_impl.h index c6714548d823..1208583fcb83 100644 --- a/arch/sparc64/kernel/pci_impl.h +++ b/arch/sparc64/kernel/pci_impl.h @@ -20,6 +20,15 @@ extern int pci_num_controllers; extern struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm); extern void pci_determine_mem_io_space(struct pci_pbm_info *pbm); +extern int pci_host_bridge_read_pci_cfg(struct pci_bus *bus_dev, + unsigned int devfn, + int where, int size, + u32 *value); +extern int pci_host_bridge_write_pci_cfg(struct pci_bus *bus_dev, + unsigned int devfn, + int where, int size, + u32 value); + /* Error reporting support. */ extern void pci_scan_for_target_abort(struct pci_controller_info *, struct pci_pbm_info *, struct pci_bus *); extern void pci_scan_for_master_abort(struct pci_controller_info *, struct pci_pbm_info *, struct pci_bus *); diff --git a/arch/sparc64/kernel/pci_psycho.c b/arch/sparc64/kernel/pci_psycho.c index 2e5d40a26dbd..154c03290d5d 100644 --- a/arch/sparc64/kernel/pci_psycho.c +++ b/arch/sparc64/kernel/pci_psycho.c @@ -118,6 +118,10 @@ static int psycho_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn, u16 tmp16; u8 tmp8; + if (bus_dev == pbm->pci_bus && devfn == 0x00) + return pci_host_bridge_read_pci_cfg(bus_dev, devfn, where, + size, value); + switch (size) { case 1: *value = 0xff; @@ -171,6 +175,9 @@ static int psycho_write_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn, unsigned char bus = bus_dev->number; u32 *addr; + if (bus_dev == pbm->pci_bus && devfn == 0x00) + return pci_host_bridge_write_pci_cfg(bus_dev, devfn, where, + size, value); addr = psycho_pci_config_mkaddr(pbm, bus, devfn, where); if (!addr) return PCIBIOS_SUCCESSFUL; diff --git a/arch/sparc64/kernel/pci_sabre.c b/arch/sparc64/kernel/pci_sabre.c index 1bd7fc7c05e6..a2f129d29c20 100644 --- a/arch/sparc64/kernel/pci_sabre.c +++ b/arch/sparc64/kernel/pci_sabre.c @@ -319,6 +319,12 @@ static int __sabre_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn, static int sabre_read_pci_cfg(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value) { + struct pci_pbm_info *pbm = bus->sysdata; + + if (bus == pbm->pci_bus && devfn == 0x00) + return pci_host_bridge_read_pci_cfg(bus, devfn, where, + size, value); + if (!bus->number && sabre_out_of_range(devfn)) { switch (size) { case 1: @@ -435,6 +441,12 @@ static int __sabre_write_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn, static int sabre_write_pci_cfg(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value) { + struct pci_pbm_info *pbm = bus->sysdata; + + if (bus == pbm->pci_bus && devfn == 0x00) + return pci_host_bridge_write_pci_cfg(bus, devfn, where, + size, value); + if (bus->number) return __sabre_write_pci_cfg(bus, devfn, where, size, value); diff --git a/arch/sparc64/kernel/pci_schizo.c b/arch/sparc64/kernel/pci_schizo.c index f1f105af8d3c..322cdbf50eff 100644 --- a/arch/sparc64/kernel/pci_schizo.c +++ b/arch/sparc64/kernel/pci_schizo.c @@ -125,6 +125,9 @@ static int schizo_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn, u16 tmp16; u8 tmp8; + if (bus_dev == pbm->pci_bus && devfn == 0x00) + return pci_host_bridge_read_pci_cfg(bus_dev, devfn, where, + size, value); switch (size) { case 1: *value = 0xff; @@ -178,6 +181,9 @@ static int schizo_write_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn, unsigned char bus = bus_dev->number; u32 *addr; + if (bus_dev == pbm->pci_bus && devfn == 0x00) + return pci_host_bridge_write_pci_cfg(bus_dev, devfn, where, + size, value); addr = schizo_pci_config_mkaddr(pbm, bus, devfn, where); if (!addr) return PCIBIOS_SUCCESSFUL; diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c index a8c12c1e8039..52bd4563492d 100644 --- a/arch/sparc64/kernel/pci_sun4v.c +++ b/arch/sparc64/kernel/pci_sun4v.c @@ -612,6 +612,9 @@ static int pci_sun4v_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn, unsigned int func = PCI_FUNC(devfn); unsigned long ret; + if (bus_dev == pbm->pci_bus && devfn == 0x00) + return pci_host_bridge_read_pci_cfg(bus_dev, devfn, where, + size, value); if (pci_sun4v_out_of_range(pbm, bus, device, func)) { ret = ~0UL; } else { @@ -650,6 +653,9 @@ static int pci_sun4v_write_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn, unsigned int func = PCI_FUNC(devfn); unsigned long ret; + if (bus_dev == pbm->pci_bus && devfn == 0x00) + return pci_host_bridge_write_pci_cfg(bus_dev, devfn, where, + size, value); if (pci_sun4v_out_of_range(pbm, bus, device, func)) { /* Do nothing. */ } else { -- 2.20.1