-stable review patch. If anyone has any objections, please let us know. ------------------ From: David Miller [SPARC64]: Fix sun4u PCI config space accesses on sun4u. Don't provide fake PCI config space for sun4u. Also, put back the funny host controller space handling that at least Sabre needs. You have to read PCI host controller registers at their nature size otherwise you get zeros instead of correct values. Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- arch/sparc64/kernel/pci.c | 15 +++- arch/sparc64/kernel/pci_common.c | 123 ++++++++++++++++++++++++++++++++++++--- 2 files changed, 126 insertions(+), 12 deletions(-) --- a/arch/sparc64/kernel/pci.c +++ b/arch/sparc64/kernel/pci.c @@ -422,10 +422,15 @@ struct pci_dev *of_create_pci_dev(struct dev->multifunction = 0; /* maybe a lie? */ if (host_controller) { - dev->vendor = 0x108e; - dev->device = 0x8000; - dev->subsystem_vendor = 0x0000; - dev->subsystem_device = 0x0000; + if (tlb_type != hypervisor) { + pci_read_config_word(dev, PCI_VENDOR_ID, + &dev->vendor); + pci_read_config_word(dev, PCI_DEVICE_ID, + &dev->device); + } else { + dev->vendor = PCI_VENDOR_ID_SUN; + dev->device = 0x80f0; + } dev->cfg_size = 256; dev->class = PCI_CLASS_BRIDGE_HOST << 8; sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus), @@ -817,7 +822,7 @@ int pci_host_bridge_read_pci_cfg(struct { static u8 fake_pci_config[] = { 0x8e, 0x10, /* Vendor: 0x108e (Sun) */ - 0x00, 0x80, /* Device: 0x8000 (PBM) */ + 0xf0, 0x80, /* Device: 0x80f0 (Fire) */ 0x46, 0x01, /* Command: 0x0146 (SERR, PARITY, MASTER, MEM) */ 0xa0, 0x22, /* Status: 0x02a0 (DEVSEL_MED, FB2B, 66MHZ) */ 0x00, 0x00, 0x00, 0x06, /* Class: 0x06000000 host bridge */ --- a/arch/sparc64/kernel/pci_common.c +++ b/arch/sparc64/kernel/pci_common.c @@ -44,6 +44,67 @@ static void *sun4u_config_mkaddr(struct return (void *) (pbm->config_space | bus | devfn | reg); } +/* At least on Sabre, it is necessary to access all PCI host controller + * registers at their natural size, otherwise zeros are returned. + * Strange but true, and I see no language in the UltraSPARC-IIi + * programmer's manual that mentions this even indirectly. + */ +static int sun4u_read_pci_cfg_host(struct pci_pbm_info *pbm, + unsigned char bus, unsigned int devfn, + int where, int size, u32 *value) +{ + u32 tmp32, *addr; + u16 tmp16; + u8 tmp8; + + addr = sun4u_config_mkaddr(pbm, bus, devfn, where); + if (!addr) + return PCIBIOS_SUCCESSFUL; + + switch (size) { + case 1: + if (where < 8) { + unsigned long align = (unsigned long) addr; + + align &= ~1; + pci_config_read16((u16 *)align, &tmp16); + if (where & 1) + *value = tmp16 >> 8; + else + *value = tmp16 & 0xff; + } else { + pci_config_read8((u8 *)addr, &tmp8); + *value = (u32) tmp8; + } + break; + + case 2: + if (where < 8) { + pci_config_read16((u16 *)addr, &tmp16); + *value = (u32) tmp16; + } else { + pci_config_read8((u8 *)addr, &tmp8); + *value = (u32) tmp8; + pci_config_read8(((u8 *)addr) + 1, &tmp8); + *value |= ((u32) tmp8) << 8; + } + break; + + case 4: + tmp32 = 0xffffffff; + sun4u_read_pci_cfg_host(pbm, bus, devfn, + where, 2, &tmp32); + *value = tmp32; + + tmp32 = 0xffffffff; + sun4u_read_pci_cfg_host(pbm, bus, devfn, + where + 2, 2, &tmp32); + *value |= tmp32 << 16; + break; + } + return PCIBIOS_SUCCESSFUL; +} + static int sun4u_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn, int where, int size, u32 *value) { @@ -53,10 +114,6 @@ static int sun4u_read_pci_cfg(struct pci 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; @@ -69,6 +126,10 @@ static int sun4u_read_pci_cfg(struct pci break; } + if (!bus_dev->number && !PCI_SLOT(devfn)) + return sun4u_read_pci_cfg_host(pbm, bus, devfn, where, + size, value); + addr = sun4u_config_mkaddr(pbm, bus, devfn, where); if (!addr) return PCIBIOS_SUCCESSFUL; @@ -101,6 +162,53 @@ static int sun4u_read_pci_cfg(struct pci return PCIBIOS_SUCCESSFUL; } +static int sun4u_write_pci_cfg_host(struct pci_pbm_info *pbm, + unsigned char bus, unsigned int devfn, + int where, int size, u32 value) +{ + u32 *addr; + + addr = sun4u_config_mkaddr(pbm, bus, devfn, where); + if (!addr) + return PCIBIOS_SUCCESSFUL; + + switch (size) { + case 1: + if (where < 8) { + unsigned long align = (unsigned long) addr; + u16 tmp16; + + align &= ~1; + pci_config_read16((u16 *)align, &tmp16); + if (where & 1) { + tmp16 &= 0x00ff; + tmp16 |= value << 8; + } else { + tmp16 &= 0xff00; + tmp16 |= value; + } + pci_config_write16((u16 *)align, tmp16); + } else + pci_config_write8((u8 *)addr, value); + break; + case 2: + if (where < 8) { + pci_config_write16((u16 *)addr, value); + } else { + pci_config_write8((u8 *)addr, value & 0xff); + pci_config_write8(((u8 *)addr) + 1, value >> 8); + } + break; + case 4: + sun4u_write_pci_cfg_host(pbm, bus, devfn, + where, 2, value & 0xffff); + sun4u_write_pci_cfg_host(pbm, bus, devfn, + where + 2, 2, value >> 16); + break; + } + return PCIBIOS_SUCCESSFUL; +} + static int sun4u_write_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn, int where, int size, u32 value) { @@ -108,9 +216,10 @@ static int sun4u_write_pci_cfg(struct pc 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); + if (!bus_dev->number && !PCI_SLOT(devfn)) + return sun4u_write_pci_cfg_host(pbm, bus, devfn, where, + size, value); + addr = sun4u_config_mkaddr(pbm, bus, devfn, where); if (!addr) return PCIBIOS_SUCCESSFUL; -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/