From 8cc9a8fe57adfb52abaa90a8a2ac2316de8eb898 Mon Sep 17 00:00:00 2001 From: Adam Jackson Date: Tue, 10 May 2011 17:56:34 -0400 Subject: Add map_legacy interface This allows platforms to hand back mmaps of the low 1M (ISA) address space on a per-domain basis. Signed-off-by: Adam Jackson Reviewed-by: Jeremy Huddleston --- src/common_interface.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ src/pciaccess_private.h | 4 ++++ 2 files changed, 48 insertions(+) (limited to 'src') diff --git a/src/common_interface.c b/src/common_interface.c index 94a0d21..6dccf8e 100644 --- a/src/common_interface.c +++ b/src/common_interface.c @@ -654,3 +654,47 @@ pci_device_enable(struct pci_device *dev) if (pci_sys->methods->enable) pci_sys->methods->enable(dev); } + +/** + * Map the legacy memory space for the PCI domain containing \c dev. + * + * \param dev Device whose memory region is to be mapped. + * \param base Base address of the range to be mapped. + * \param size Size of the range to be mapped. + * \param map_flags Flag bits controlling how the mapping is accessed. + * \param addr Location to store the mapped address. + * + * \returns + * Zero on success or an \c errno value on failure. + */ +int +pci_device_map_legacy(struct pci_device *dev, pciaddr_t base, pciaddr_t size, + unsigned map_flags, void **addr) +{ + if (base > 0x100000 || base + size > 0x100000) + return EINVAL; + + if (!pci_sys->methods->map_legacy) + return ENOSYS; + + return pci_sys->methods->map_legacy(dev, base, size, map_flags, addr); +} + +/** + * Unmap the legacy memory space for the PCI domain containing \c dev. + * + * \param dev Device whose memory region is to be unmapped. + * \param addr Location of the mapped address. + * \param size Size of the range to be unmapped. + * + * \returns + * Zero on success or an \c errno value on failure. + */ +int +pci_device_unmap_legacy(struct pci_device *dev, void *addr, pciaddr_t size) +{ + if (!pci_sys->methods->unmap_legacy) + return ENOSYS; + + return pci_sys->methods->unmap_legacy(dev, addr, size); +} diff --git a/src/pciaccess_private.h b/src/pciaccess_private.h index beaeaa7..1653b8b 100644 --- a/src/pciaccess_private.h +++ b/src/pciaccess_private.h @@ -77,6 +77,10 @@ struct pci_system_methods { void (*write16)( struct pci_io_handle *handle, uint32_t reg, uint16_t data ); void (*write8)( struct pci_io_handle *handle, uint32_t reg, uint8_t data ); + + int (*map_legacy)(struct pci_device *dev, pciaddr_t base, pciaddr_t size, + unsigned map_flags, void **addr); + int (*unmap_legacy)(struct pci_device *dev, void *addr, pciaddr_t size); }; struct pci_device_mapping { -- cgit v1.2.3