diff options
| author | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-02 16:45:22 -0400 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-06 12:55:32 -0400 |
| commit | cf89c4262bd5fa70e67953126001c08ecea4f346 (patch) | |
| tree | b968b7a7a2a9fb2140779948911e5c71b29585b1 /arch/tile/include/asm/pci.h | |
| parent | a3c4f2fb26974b5134861af8f7593040ae61a1f4 (diff) | |
tile PCI RC: support I/O space access
To enable this functionality, configure CONFIG_TILE_PCI_IO. Without
this flag, the kernel still assigns I/O address ranges to the
devices, but no TRIO resource and mapping support is provided.
We assign disjoint I/O address ranges to separate PCIe domains.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/include/asm/pci.h')
| -rw-r--r-- | arch/tile/include/asm/pci.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/tile/include/asm/pci.h b/arch/tile/include/asm/pci.h index cd10e654916..9cf5308b165 100644 --- a/arch/tile/include/asm/pci.h +++ b/arch/tile/include/asm/pci.h @@ -144,6 +144,10 @@ struct pci_controller { int pio_mem_index; /* PIO region index for memory access */ +#ifdef CONFIG_TILE_PCI_IO + int pio_io_index; /* PIO region index for I/O space access */ +#endif + /* * Mem-Map regions for all the memory controllers so that Linux can * map all of its physical memory space to the PCI bus. @@ -153,6 +157,10 @@ struct pci_controller { int index; /* PCI domain number */ struct pci_bus *root_bus; + /* PCI I/O space resource for this controller. */ + struct resource io_space; + char io_space_name[32]; + /* PCI memory space resource for this controller. */ struct resource mem_space; char mem_space_name[32]; @@ -210,7 +218,8 @@ static inline int pcibios_assign_all_busses(void) } #define PCIBIOS_MIN_MEM 0 -#define PCIBIOS_MIN_IO 0 +/* Minimum PCI I/O address, starting at the page boundary. */ +#define PCIBIOS_MIN_IO PAGE_SIZE /* Use any cpu for PCI. */ #define cpumask_of_pcibus(bus) cpu_online_mask |