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pci: add MemoryRegion based BAR management API 

Allow registering a BAR using a MemoryRegion.  Once all users are converted,
pci_register_bar() and pci_register_bar_simple() will be removed.

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Avi Kivity 2011-07-26 14:26:20 +03:00 committed by Anthony Liguori
parent 1e39101c64
commit 79ff8cb0df
2 changed files with 42 additions and 8 deletions
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47
hw/pci.c
View File

@ -844,10 +844,15 @@ static void pci_unregister_io_regions(PCIDevice *pci_dev)
if (r->type == PCI_BASE_ADDRESS_SPACE_IO) {
isa_unassign_ioport(r->addr, r->filtered_size);
} else {
cpu_register_physical_memory(pci_to_cpu_addr(pci_dev->bus,
r->addr),
r->filtered_size,
IO_MEM_UNASSIGNED);
if (r->memory) {
memory_region_del_subregion(pci_dev->bus->address_space,
r->memory);
} else {
cpu_register_physical_memory(pci_to_cpu_addr(pci_dev->bus,
r->addr),
r->filtered_size,
IO_MEM_UNASSIGNED);
}
}
}
}
@ -893,6 +898,7 @@ void pci_register_bar(PCIDevice *pci_dev, int region_num,
r->type = type;
r->map_func = map_func;
r->ram_addr = IO_MEM_UNASSIGNED;
r->memory = NULL;
wmask = ~(size - 1);
addr = pci_bar(pci_dev, region_num);
@ -918,6 +924,16 @@ static void pci_simple_bar_mapfunc(PCIDevice *pci_dev, int region_num,
pci_dev->io_regions[region_num].ram_addr);
}
static void pci_simple_bar_mapfunc_region(PCIDevice *pci_dev, int region_num,
pcibus_t addr, pcibus_t size,
int type)
{
memory_region_add_subregion_overlap(pci_dev->bus->address_space,
addr,
pci_dev->io_regions[region_num].memory,
1);
}
void pci_register_bar_simple(PCIDevice *pci_dev, int region_num,
pcibus_t size, uint8_t attr, ram_addr_t ram_addr)
{
@ -927,6 +943,15 @@ void pci_register_bar_simple(PCIDevice *pci_dev, int region_num,
pci_dev->io_regions[region_num].ram_addr = ram_addr;
}
void pci_register_bar_region(PCIDevice *pci_dev, int region_num,
uint8_t attr, MemoryRegion *memory)
{
pci_register_bar(pci_dev, region_num, memory_region_size(memory),
PCI_BASE_ADDRESS_SPACE_MEMORY | attr,
pci_simple_bar_mapfunc_region);
pci_dev->io_regions[region_num].memory = memory;
}
static void pci_bridge_filter(PCIDevice *d, pcibus_t *addr, pcibus_t *size,
uint8_t type)
{
@ -1065,10 +1090,16 @@ static void pci_update_mappings(PCIDevice *d)
isa_unassign_ioport(r->addr, r->filtered_size);
}
} else {
cpu_register_physical_memory(pci_to_cpu_addr(d->bus, r->addr),
r->filtered_size,
IO_MEM_UNASSIGNED);
qemu_unregister_coalesced_mmio(r->addr, r->filtered_size);
if (r->memory) {
memory_region_del_subregion(d->bus->address_space,
r->memory);
} else {
cpu_register_physical_memory(pci_to_cpu_addr(d->bus,
r->addr),
r->filtered_size,
IO_MEM_UNASSIGNED);
qemu_unregister_coalesced_mmio(r->addr, r->filtered_size);
}
}
}
r->addr = new_addr;

3
hw/pci.h
View File

@ -94,6 +94,7 @@ typedef struct PCIIORegion {
uint8_t type;
PCIMapIORegionFunc *map_func;
ram_addr_t ram_addr;
MemoryRegion *memory;
} PCIIORegion;
#define PCI_ROM_SLOT 6
@ -204,6 +205,8 @@ void pci_register_bar(PCIDevice *pci_dev, int region_num,
PCIMapIORegionFunc *map_func);
void pci_register_bar_simple(PCIDevice *pci_dev, int region_num,
pcibus_t size, uint8_t attr, ram_addr_t ram_addr);
void pci_register_bar_region(PCIDevice *pci_dev, int region_num,
uint8_t attr, MemoryRegion *memory);
int pci_add_capability(PCIDevice *pdev, uint8_t cap_id,
uint8_t offset, uint8_t size);