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pci: Split pcie_host_mmcfg_map() 

The mmcfg space is a memory region that allows access to PCI config space
in the PCIe world. To maintain abstraction layers, I would like to expose
the mmcfg space as a sysbus mmio region rather than have it mapped straight
into the system's memory address space though.

So this patch splits the initialization of the mmcfg space from the actual
mapping, allowing us to only have an mmfg memory region without the map.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
This commit is contained in:
Alexander Graf 2015-01-06 17:03:08 +01:00 committed by Michael S. Tsirkin
parent 7828d75045
commit 27fb9688f9
2 changed files with 8 additions and 2 deletions
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9
hw/pci/pcie_host.c
View File

@ -98,8 +98,7 @@ void pcie_host_mmcfg_unmap(PCIExpressHost *e)
}
}
void pcie_host_mmcfg_map(PCIExpressHost *e, hwaddr addr,
uint32_t size)
void pcie_host_mmcfg_init(PCIExpressHost *e, uint32_t size)
{
assert(!(size & (size - 1))); /* power of 2 */
assert(size >= PCIE_MMCFG_SIZE_MIN);
@ -107,6 +106,12 @@ void pcie_host_mmcfg_map(PCIExpressHost *e, hwaddr addr,
e->size = size;
memory_region_init_io(&e->mmio, OBJECT(e), &pcie_mmcfg_ops, e,
"pcie-mmcfg", e->size);
}
void pcie_host_mmcfg_map(PCIExpressHost *e, hwaddr addr,
uint32_t size)
{
pcie_host_mmcfg_init(e, size);
e->base_addr = addr;
memory_region_add_subregion(get_system_memory(), e->base_addr, &e->mmio);
}

1
include/hw/pci/pcie_host.h
View File

@ -50,6 +50,7 @@ struct PCIExpressHost {
};
void pcie_host_mmcfg_unmap(PCIExpressHost *e);
void pcie_host_mmcfg_init(PCIExpressHost *e, uint32_t size);
void pcie_host_mmcfg_map(PCIExpressHost *e, hwaddr addr, uint32_t size);
void pcie_host_mmcfg_update(PCIExpressHost *e,
int enable,