/* Initialize the MSI-X structures. Note: if MSI-X is supported, BAR size is
* modified, it should be retrieved with msix_bar_size. */
int msix_init(struct PCIDevice *dev, unsigned short nentries,
MemoryRegion *bar,
unsigned bar_nr, unsigned bar_size)
{
int ret;
/* Nothing to do if MSI is not supported by interrupt controller */
if (!msix_supported ||
(kvm_enabled() && kvm_irqchip_in_kernel() && !kvm_has_gsi_routing())) {
return -ENOTSUP;
}
if (nentries > MSIX_MAX_ENTRIES)
return -EINVAL;
dev->msix_mask_notifier = NULL;
dev->msix_entry_used = g_malloc0(MSIX_MAX_ENTRIES *
sizeof *dev->msix_entry_used);
dev->msix_table_page = g_malloc0(MSIX_PAGE_SIZE);
msix_mask_all(dev, nentries);
memory_region_init_io(&dev->msix_mmio, &msix_mmio_ops, dev,
"msix", MSIX_PAGE_SIZE);
dev->msix_entries_nr = nentries;
ret = msix_add_config(dev, nentries, bar_nr, bar_size);
if (ret)
goto err_config;
if (kvm_enabled() && kvm_irqchip_in_kernel()) {
dev->msix_irq_entries = g_malloc(nentries *
sizeof *dev->msix_irq_entries);
}
dev->cap_present |= QEMU_PCI_CAP_MSIX;
msix_mmio_setup(dev, bar);
return 0;
err_config:
dev->msix_entries_nr = 0;
memory_region_destroy(&dev->msix_mmio);
g_free(dev->msix_table_page);
dev->msix_table_page = NULL;
g_free(dev->msix_entry_used);
dev->msix_entry_used = NULL;
return ret;
}
/* Initialize the MSI-X structures. Note: if MSI-X is supported, BAR size is
* modified, it should be retrieved with msix_bar_size. */
int msix_init(struct PCIDevice *dev, unsigned short nentries,
MemoryRegion *bar,
unsigned bar_nr, unsigned bar_size)
{
int ret;
/* Nothing to do if MSI is not supported by interrupt controller */
if (!msix_supported)
return -ENOTSUP;
if (nentries > MSIX_MAX_ENTRIES)
return -EINVAL;
dev->msix_entry_used = qemu_mallocz(MSIX_MAX_ENTRIES *
sizeof *dev->msix_entry_used);
dev->msix_table_page = qemu_mallocz(MSIX_PAGE_SIZE);
msix_mask_all(dev, nentries);
memory_region_init_io(&dev->msix_mmio, &msix_mmio_ops, dev,
"msix", MSIX_PAGE_SIZE);
dev->msix_entries_nr = nentries;
ret = msix_add_config(dev, nentries, bar_nr, bar_size);
if (ret)
goto err_config;
dev->cap_present |= QEMU_PCI_CAP_MSIX;
msix_mmio_setup(dev, bar);
return 0;
err_config:
dev->msix_entries_nr = 0;
memory_region_destroy(&dev->msix_mmio);
qemu_free(dev->msix_table_page);
dev->msix_table_page = NULL;
qemu_free(dev->msix_entry_used);
dev->msix_entry_used = NULL;
return ret;
}