diff options
Diffstat (limited to 'hw/pci.c')
| -rw-r--r-- | hw/pci.c | 25 |
1 files changed, 24 insertions, 1 deletions
@@ -33,6 +33,7 @@ #include "qmp-commands.h" #include "msi.h" #include "msix.h" +#include "exec-memory.h" //#define DEBUG_PCI #ifdef DEBUG_PCI @@ -777,6 +778,17 @@ static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus, pci_dev->bus = bus; if (bus->dma_context_fn) { pci_dev->dma = bus->dma_context_fn(bus, bus->dma_context_opaque, devfn); + } else { + /* FIXME: Make dma_context_fn use MemoryRegions instead, so this path is + * taken unconditionally */ + /* FIXME: inherit memory region from bus creator */ + memory_region_init_alias(&pci_dev->bus_master_enable_region, "bus master", + get_system_memory(), 0, + memory_region_size(get_system_memory())); + memory_region_set_enabled(&pci_dev->bus_master_enable_region, false); + address_space_init(&pci_dev->bus_master_as, &pci_dev->bus_master_enable_region); + pci_dev->dma = g_new(DMAContext, 1); + dma_context_init(pci_dev->dma, &pci_dev->bus_master_as, NULL, NULL, NULL); } pci_dev->devfn = devfn; pstrcpy(pci_dev->name, sizeof(pci_dev->name), name); @@ -830,6 +842,13 @@ static void do_pci_unregister_device(PCIDevice *pci_dev) qemu_free_irqs(pci_dev->irq); pci_dev->bus->devices[pci_dev->devfn] = NULL; pci_config_free(pci_dev); + + if (!pci_dev->bus->dma_context_fn) { + address_space_destroy(&pci_dev->bus_master_as); + memory_region_destroy(&pci_dev->bus_master_enable_region); + g_free(pci_dev->dma); + pci_dev->dma = NULL; + } } static void pci_unregister_io_regions(PCIDevice *pci_dev) @@ -1051,8 +1070,12 @@ void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l) range_covers_byte(addr, l, PCI_COMMAND)) pci_update_mappings(d); - if (range_covers_byte(addr, l, PCI_COMMAND)) + if (range_covers_byte(addr, l, PCI_COMMAND)) { pci_update_irq_disabled(d, was_irq_disabled); + memory_region_set_enabled(&d->bus_master_enable_region, + pci_get_word(d->config + PCI_COMMAND) + & PCI_COMMAND_MASTER); + } msi_write_config(d, addr, val, l); msix_write_config(d, addr, val, l); |