diff options
Diffstat (limited to 'arch/sparc64/kernel/pci_common.c')
| -rw-r--r-- | arch/sparc64/kernel/pci_common.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/pci_common.c b/arch/sparc64/kernel/pci_common.c index 76faaa8135dd..f974fefc3ebc 100644 --- a/arch/sparc64/kernel/pci_common.c +++ b/arch/sparc64/kernel/pci_common.c @@ -14,6 +14,200 @@ #include <asm/oplib.h> #include "pci_impl.h" +#include "pci_sun4v.h" + +static int config_out_of_range(struct pci_pbm_info *pbm, + unsigned long bus, + unsigned long devfn, + unsigned long reg) +{ + if (bus < pbm->pci_first_busno || + bus > pbm->pci_last_busno) + return 1; + return 0; +} + +static void *sun4u_config_mkaddr(struct pci_pbm_info *pbm, + unsigned long bus, + unsigned long devfn, + unsigned long reg) +{ + unsigned long rbits = pbm->config_space_reg_bits; + + if (config_out_of_range(pbm, bus, devfn, reg)) + return NULL; + + reg = (reg & ((1 << rbits) - 1)); + devfn <<= rbits; + bus <<= rbits + 8; + + return (void *) (pbm->config_space | bus | devfn | reg); +} + +static int sun4u_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn, + int where, int size, u32 *value) +{ + struct pci_pbm_info *pbm = bus_dev->sysdata; + unsigned char bus = bus_dev->number; + u32 *addr; + 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; + break; + case 2: + *value = 0xffff; + break; + case 4: + *value = 0xffffffff; + break; + } + + addr = sun4u_config_mkaddr(pbm, bus, devfn, where); + if (!addr) + return PCIBIOS_SUCCESSFUL; + + switch (size) { + case 1: + pci_config_read8((u8 *)addr, &tmp8); + *value = (u32) tmp8; + break; + + case 2: + if (where & 0x01) { + printk("pci_read_config_word: misaligned reg [%x]\n", + where); + return PCIBIOS_SUCCESSFUL; + } + pci_config_read16((u16 *)addr, &tmp16); + *value = (u32) tmp16; + break; + + case 4: + if (where & 0x03) { + printk("pci_read_config_dword: misaligned reg [%x]\n", + where); + return PCIBIOS_SUCCESSFUL; + } + pci_config_read32(addr, value); + break; + } + return PCIBIOS_SUCCESSFUL; +} + +static int sun4u_write_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn, + int where, int size, u32 value) +{ + struct pci_pbm_info *pbm = bus_dev->sysdata; + 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 = sun4u_config_mkaddr(pbm, bus, devfn, where); + if (!addr) + return PCIBIOS_SUCCESSFUL; + + switch (size) { + case 1: + pci_config_write8((u8 *)addr, value); + break; + + case 2: + if (where & 0x01) { + printk("pci_write_config_word: misaligned reg [%x]\n", + where); + return PCIBIOS_SUCCESSFUL; + } + pci_config_write16((u16 *)addr, value); + break; + + case 4: + if (where & 0x03) { + printk("pci_write_config_dword: misaligned reg [%x]\n", + where); + return PCIBIOS_SUCCESSFUL; + } + pci_config_write32(addr, value); + } + return PCIBIOS_SUCCESSFUL; +} + +struct pci_ops sun4u_pci_ops = { + .read = sun4u_read_pci_cfg, + .write = sun4u_write_pci_cfg, +}; + +static int sun4v_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn, + int where, int size, u32 *value) +{ + struct pci_pbm_info *pbm = bus_dev->sysdata; + u32 devhandle = pbm->devhandle; + unsigned int bus = bus_dev->number; + unsigned int device = PCI_SLOT(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 (config_out_of_range(pbm, bus, devfn, where)) { + ret = ~0UL; + } else { + ret = pci_sun4v_config_get(devhandle, + HV_PCI_DEVICE_BUILD(bus, device, func), + where, size); + } + switch (size) { + case 1: + *value = ret & 0xff; + break; + case 2: + *value = ret & 0xffff; + break; + case 4: + *value = ret & 0xffffffff; + break; + }; + + + return PCIBIOS_SUCCESSFUL; +} + +static int sun4v_write_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn, + int where, int size, u32 value) +{ + struct pci_pbm_info *pbm = bus_dev->sysdata; + u32 devhandle = pbm->devhandle; + unsigned int bus = bus_dev->number; + unsigned int device = PCI_SLOT(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 (config_out_of_range(pbm, bus, devfn, where)) { + /* Do nothing. */ + } else { + ret = pci_sun4v_config_put(devhandle, + HV_PCI_DEVICE_BUILD(bus, device, func), + where, size, value); + } + return PCIBIOS_SUCCESSFUL; +} + +struct pci_ops sun4v_pci_ops = { + .read = sun4v_read_pci_cfg, + .write = sun4v_write_pci_cfg, +}; void pci_get_pbm_props(struct pci_pbm_info *pbm) { |