#include "virtio.h"
#include "pci.h"
-//#include "sysemu.h"
+#include "sysemu.h"
+#include "msix.h"
+#include "net.h"
/* from Linux's linux/virtio_pci.h */
* a read-and-acknowledge. */
#define VIRTIO_PCI_ISR 19
-#define VIRTIO_PCI_CONFIG 20
+/* MSI-X registers: only enabled if MSI-X is enabled. */
+/* A 16-bit vector for configuration changes. */
+#define VIRTIO_MSI_CONFIG_VECTOR 20
+/* A 16-bit vector for selected queue notifications. */
+#define VIRTIO_MSI_QUEUE_VECTOR 22
+
+/* Config space size */
+#define VIRTIO_PCI_CONFIG_NOMSI 20
+#define VIRTIO_PCI_CONFIG_MSI 24
+#define VIRTIO_PCI_REGION_SIZE(dev) (msix_present(dev) ? \
+ VIRTIO_PCI_CONFIG_MSI : \
+ VIRTIO_PCI_CONFIG_NOMSI)
+
+/* The remaining space is defined by each driver as the per-driver
+ * configuration space */
+#define VIRTIO_PCI_CONFIG(dev) (msix_enabled(dev) ? \
+ VIRTIO_PCI_CONFIG_MSI : \
+ VIRTIO_PCI_CONFIG_NOMSI)
/* Virtio ABI version, if we increment this, we break the guest driver. */
#define VIRTIO_PCI_ABI_VERSION 0
PCIDevice pci_dev;
VirtIODevice *vdev;
uint32_t addr;
-
- uint16_t vendor;
- uint16_t device;
- uint16_t subvendor;
- uint16_t class_code;
- uint8_t pif;
+ uint32_t class_code;
+ uint32_t nvectors;
+ DriveInfo *dinfo;
} VirtIOPCIProxy;
/* virtio device */
-static void virtio_pci_update_irq(void *opaque)
+static void virtio_pci_notify(void *opaque, uint16_t vector)
{
VirtIOPCIProxy *proxy = opaque;
+ if (msix_enabled(&proxy->pci_dev))
+ msix_notify(&proxy->pci_dev, vector);
+ else
+ qemu_set_irq(proxy->pci_dev.irq[0], proxy->vdev->isr & 1);
+}
- qemu_set_irq(proxy->pci_dev.irq[0], proxy->vdev->isr & 1);
+static void virtio_pci_save_config(void * opaque, QEMUFile *f)
+{
+ VirtIOPCIProxy *proxy = opaque;
+ pci_device_save(&proxy->pci_dev, f);
+ msix_save(&proxy->pci_dev, f);
+ if (msix_present(&proxy->pci_dev))
+ qemu_put_be16(f, proxy->vdev->config_vector);
+}
+
+static void virtio_pci_save_queue(void * opaque, int n, QEMUFile *f)
+{
+ VirtIOPCIProxy *proxy = opaque;
+ if (msix_present(&proxy->pci_dev))
+ qemu_put_be16(f, virtio_queue_vector(proxy->vdev, n));
+}
+
+static int virtio_pci_load_config(void * opaque, QEMUFile *f)
+{
+ VirtIOPCIProxy *proxy = opaque;
+ int ret;
+ ret = pci_device_load(&proxy->pci_dev, f);
+ if (ret) {
+ return ret;
+ }
+ msix_load(&proxy->pci_dev, f);
+ if (msix_present(&proxy->pci_dev)) {
+ qemu_get_be16s(f, &proxy->vdev->config_vector);
+ } else {
+ proxy->vdev->config_vector = VIRTIO_NO_VECTOR;
+ }
+ if (proxy->vdev->config_vector != VIRTIO_NO_VECTOR) {
+ return msix_vector_use(&proxy->pci_dev, proxy->vdev->config_vector);
+ }
+ return 0;
+}
+
+static int virtio_pci_load_queue(void * opaque, int n, QEMUFile *f)
+{
+ VirtIOPCIProxy *proxy = opaque;
+ uint16_t vector;
+ if (msix_present(&proxy->pci_dev)) {
+ qemu_get_be16s(f, &vector);
+ } else {
+ vector = VIRTIO_NO_VECTOR;
+ }
+ virtio_queue_set_vector(proxy->vdev, n, vector);
+ if (vector != VIRTIO_NO_VECTOR) {
+ return msix_vector_use(&proxy->pci_dev, vector);
+ }
+ return 0;
+}
+
+static void virtio_pci_reset(void *opaque)
+{
+ VirtIOPCIProxy *proxy = opaque;
+ virtio_reset(proxy->vdev);
+ msix_reset(&proxy->pci_dev);
}
static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
VirtIODevice *vdev = proxy->vdev;
target_phys_addr_t pa;
- addr -= proxy->addr;
-
switch (addr) {
case VIRTIO_PCI_GUEST_FEATURES:
/* Guest does not negotiate properly? We have to assume nothing. */
break;
case VIRTIO_PCI_QUEUE_PFN:
pa = (target_phys_addr_t)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
- virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
+ if (pa == 0)
+ virtio_pci_reset(proxy);
+ else
+ virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
break;
case VIRTIO_PCI_QUEUE_SEL:
if (val < VIRTIO_PCI_QUEUE_MAX)
case VIRTIO_PCI_STATUS:
vdev->status = val & 0xFF;
if (vdev->status == 0)
- virtio_reset(vdev);
+ virtio_pci_reset(proxy);
+ break;
+ case VIRTIO_MSI_CONFIG_VECTOR:
+ msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
+ /* Make it possible for guest to discover an error took place. */
+ if (msix_vector_use(&proxy->pci_dev, val) < 0)
+ val = VIRTIO_NO_VECTOR;
+ vdev->config_vector = val;
+ break;
+ case VIRTIO_MSI_QUEUE_VECTOR:
+ msix_vector_unuse(&proxy->pci_dev,
+ virtio_queue_vector(vdev, vdev->queue_sel));
+ /* Make it possible for guest to discover an error took place. */
+ if (msix_vector_use(&proxy->pci_dev, val) < 0)
+ val = VIRTIO_NO_VECTOR;
+ virtio_queue_set_vector(vdev, vdev->queue_sel, val);
+ break;
+ default:
+ fprintf(stderr, "%s: unexpected address 0x%x value 0x%x\n",
+ __func__, addr, val);
break;
}
}
-static uint32_t virtio_ioport_read(void *opaque, uint32_t addr)
+static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
{
- VirtIOPCIProxy *proxy = opaque;
VirtIODevice *vdev = proxy->vdev;
uint32_t ret = 0xFFFFFFFF;
- addr -= proxy->addr;
-
switch (addr) {
case VIRTIO_PCI_HOST_FEATURES:
ret = vdev->get_features(vdev);
/* reading from the ISR also clears it. */
ret = vdev->isr;
vdev->isr = 0;
- virtio_update_irq(vdev);
+ qemu_set_irq(proxy->pci_dev.irq[0], 0);
+ break;
+ case VIRTIO_MSI_CONFIG_VECTOR:
+ ret = vdev->config_vector;
+ break;
+ case VIRTIO_MSI_QUEUE_VECTOR:
+ ret = virtio_queue_vector(vdev, vdev->queue_sel);
break;
default:
break;
static uint32_t virtio_pci_config_readb(void *opaque, uint32_t addr)
{
VirtIOPCIProxy *proxy = opaque;
- addr -= proxy->addr + VIRTIO_PCI_CONFIG;
+ uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
+ addr -= proxy->addr;
+ if (addr < config)
+ return virtio_ioport_read(proxy, addr);
+ addr -= config;
return virtio_config_readb(proxy->vdev, addr);
}
static uint32_t virtio_pci_config_readw(void *opaque, uint32_t addr)
{
VirtIOPCIProxy *proxy = opaque;
- addr -= proxy->addr + VIRTIO_PCI_CONFIG;
+ uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
+ addr -= proxy->addr;
+ if (addr < config)
+ return virtio_ioport_read(proxy, addr);
+ addr -= config;
return virtio_config_readw(proxy->vdev, addr);
}
static uint32_t virtio_pci_config_readl(void *opaque, uint32_t addr)
{
VirtIOPCIProxy *proxy = opaque;
- addr -= proxy->addr + VIRTIO_PCI_CONFIG;
+ uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
+ addr -= proxy->addr;
+ if (addr < config)
+ return virtio_ioport_read(proxy, addr);
+ addr -= config;
return virtio_config_readl(proxy->vdev, addr);
}
static void virtio_pci_config_writeb(void *opaque, uint32_t addr, uint32_t val)
{
VirtIOPCIProxy *proxy = opaque;
- addr -= proxy->addr + VIRTIO_PCI_CONFIG;
+ uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
+ addr -= proxy->addr;
+ if (addr < config) {
+ virtio_ioport_write(proxy, addr, val);
+ return;
+ }
+ addr -= config;
virtio_config_writeb(proxy->vdev, addr, val);
}
static void virtio_pci_config_writew(void *opaque, uint32_t addr, uint32_t val)
{
VirtIOPCIProxy *proxy = opaque;
- addr -= proxy->addr + VIRTIO_PCI_CONFIG;
+ uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
+ addr -= proxy->addr;
+ if (addr < config) {
+ virtio_ioport_write(proxy, addr, val);
+ return;
+ }
+ addr -= config;
virtio_config_writew(proxy->vdev, addr, val);
}
static void virtio_pci_config_writel(void *opaque, uint32_t addr, uint32_t val)
{
VirtIOPCIProxy *proxy = opaque;
- addr -= proxy->addr + VIRTIO_PCI_CONFIG;
+ uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
+ addr -= proxy->addr;
+ if (addr < config) {
+ virtio_ioport_write(proxy, addr, val);
+ return;
+ }
+ addr -= config;
virtio_config_writel(proxy->vdev, addr, val);
}
{
VirtIOPCIProxy *proxy = container_of(pci_dev, VirtIOPCIProxy, pci_dev);
VirtIODevice *vdev = proxy->vdev;
- int i;
+ unsigned config_len = VIRTIO_PCI_REGION_SIZE(pci_dev) + vdev->config_len;
proxy->addr = addr;
- for (i = 0; i < 3; i++) {
- register_ioport_write(addr, VIRTIO_PCI_CONFIG, 1 << i,
- virtio_ioport_write, proxy);
- register_ioport_read(addr, VIRTIO_PCI_CONFIG, 1 << i,
- virtio_ioport_read, proxy);
- }
- if (vdev->config_len) {
- register_ioport_write(addr + VIRTIO_PCI_CONFIG, vdev->config_len, 1,
- virtio_pci_config_writeb, proxy);
- register_ioport_write(addr + VIRTIO_PCI_CONFIG, vdev->config_len, 2,
- virtio_pci_config_writew, proxy);
- register_ioport_write(addr + VIRTIO_PCI_CONFIG, vdev->config_len, 4,
- virtio_pci_config_writel, proxy);
- register_ioport_read(addr + VIRTIO_PCI_CONFIG, vdev->config_len, 1,
- virtio_pci_config_readb, proxy);
- register_ioport_read(addr + VIRTIO_PCI_CONFIG, vdev->config_len, 2,
- virtio_pci_config_readw, proxy);
- register_ioport_read(addr + VIRTIO_PCI_CONFIG, vdev->config_len, 4,
- virtio_pci_config_readl, proxy);
+ register_ioport_write(addr, config_len, 1, virtio_pci_config_writeb, proxy);
+ register_ioport_write(addr, config_len, 2, virtio_pci_config_writew, proxy);
+ register_ioport_write(addr, config_len, 4, virtio_pci_config_writel, proxy);
+ register_ioport_read(addr, config_len, 1, virtio_pci_config_readb, proxy);
+ register_ioport_read(addr, config_len, 2, virtio_pci_config_readw, proxy);
+ register_ioport_read(addr, config_len, 4, virtio_pci_config_readl, proxy);
+ if (vdev->config_len)
vdev->get_config(vdev, vdev->config);
+}
+
+static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
+ uint32_t val, int len)
+{
+ VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
+
+ if (PCI_COMMAND == address) {
+ if (!(val & PCI_COMMAND_MASTER)) {
+ proxy->vdev->status &= !VIRTIO_CONFIG_S_DRIVER_OK;
+ }
}
+
+ pci_default_write_config(pci_dev, address, val, len);
+ if(proxy->vdev->nvectors)
+ msix_write_config(pci_dev, address, val, len);
}
static const VirtIOBindings virtio_pci_bindings = {
- .update_irq = virtio_pci_update_irq
+ .notify = virtio_pci_notify,
+ .save_config = virtio_pci_save_config,
+ .load_config = virtio_pci_load_config,
+ .save_queue = virtio_pci_save_queue,
+ .load_queue = virtio_pci_load_queue,
};
static void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev,
config[0x3d] = 1;
- size = 20 + vdev->config_len;
+ if (vdev->nvectors && !msix_init(&proxy->pci_dev, vdev->nvectors, 1, 0)) {
+ pci_register_bar(&proxy->pci_dev, 1,
+ msix_bar_size(&proxy->pci_dev),
+ PCI_ADDRESS_SPACE_MEM,
+ msix_mmio_map);
+ proxy->pci_dev.unregister = msix_uninit;
+ } else
+ vdev->nvectors = 0;
+
+ proxy->pci_dev.config_write = virtio_write_config;
+
+ size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + vdev->config_len;
if (size & (size-1))
size = 1 << qemu_fls(size);
pci_register_bar(&proxy->pci_dev, 0, size, PCI_ADDRESS_SPACE_IO,
virtio_map);
+ qemu_register_reset(virtio_pci_reset, proxy);
+
virtio_bind_device(vdev, &virtio_pci_bindings, proxy);
}
-static void virtio_blk_init_pci(PCIDevice *pci_dev)
+static int virtio_blk_init_pci(PCIDevice *pci_dev)
{
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
VirtIODevice *vdev;
- vdev = virtio_blk_init(&pci_dev->qdev);
+ if (proxy->class_code != PCI_CLASS_STORAGE_SCSI &&
+ proxy->class_code != PCI_CLASS_STORAGE_OTHER)
+ proxy->class_code = PCI_CLASS_STORAGE_SCSI;
+
+ if (!proxy->dinfo) {
+ qemu_error("virtio-blk-pci: drive property not set\n");
+ return -1;
+ }
+ vdev = virtio_blk_init(&pci_dev->qdev, proxy->dinfo);
+ vdev->nvectors = proxy->nvectors;
virtio_init_pci(proxy, vdev,
PCI_VENDOR_ID_REDHAT_QUMRANET,
PCI_DEVICE_ID_VIRTIO_BLOCK,
- PCI_CLASS_STORAGE_OTHER,
- 0x00);
+ proxy->class_code, 0x00);
+ /* make the actual value visible */
+ proxy->nvectors = vdev->nvectors;
+ return 0;
}
-static void virtio_console_init_pci(PCIDevice *pci_dev)
+static int virtio_console_init_pci(PCIDevice *pci_dev)
{
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
VirtIODevice *vdev;
+ if (proxy->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
+ proxy->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
+ proxy->class_code != PCI_CLASS_OTHERS) /* qemu-kvm */
+ proxy->class_code = PCI_CLASS_COMMUNICATION_OTHER;
+
vdev = virtio_console_init(&pci_dev->qdev);
virtio_init_pci(proxy, vdev,
PCI_VENDOR_ID_REDHAT_QUMRANET,
PCI_DEVICE_ID_VIRTIO_CONSOLE,
- PCI_CLASS_DISPLAY_OTHER,
- 0x00);
+ proxy->class_code, 0x00);
+ return 0;
}
-static void virtio_net_init_pci(PCIDevice *pci_dev)
+static int virtio_net_init_pci(PCIDevice *pci_dev)
{
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
VirtIODevice *vdev;
vdev = virtio_net_init(&pci_dev->qdev);
+
+ /* set nvectors from property, unless the user specified something
+ * via -net nic,model=virtio,vectors=n command line option */
+ if (pci_dev->qdev.nd->nvectors == NIC_NVECTORS_UNSPECIFIED)
+ if (proxy->nvectors != NIC_NVECTORS_UNSPECIFIED)
+ vdev->nvectors = proxy->nvectors;
+
virtio_init_pci(proxy, vdev,
PCI_VENDOR_ID_REDHAT_QUMRANET,
PCI_DEVICE_ID_VIRTIO_NET,
PCI_CLASS_NETWORK_ETHERNET,
0x00);
+
+ /* make the actual value visible */
+ proxy->nvectors = vdev->nvectors;
+ return 0;
}
-static void virtio_balloon_init_pci(PCIDevice *pci_dev)
+static int virtio_balloon_init_pci(PCIDevice *pci_dev)
{
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
VirtIODevice *vdev;
PCI_DEVICE_ID_VIRTIO_BALLOON,
PCI_CLASS_MEMORY_RAM,
0x00);
+ return 0;
}
+static PCIDeviceInfo virtio_info[] = {
+ {
+ .qdev.name = "virtio-blk-pci",
+ .qdev.size = sizeof(VirtIOPCIProxy),
+ .init = virtio_blk_init_pci,
+ .qdev.props = (Property[]) {
+ DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
+ DEFINE_PROP_DRIVE("drive", VirtIOPCIProxy, dinfo),
+ DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
+ DEFINE_PROP_END_OF_LIST(),
+ },
+ },{
+ .qdev.name = "virtio-net-pci",
+ .qdev.size = sizeof(VirtIOPCIProxy),
+ .init = virtio_net_init_pci,
+ .qdev.props = (Property[]) {
+ DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
+ NIC_NVECTORS_UNSPECIFIED),
+ DEFINE_PROP_END_OF_LIST(),
+ },
+ },{
+ .qdev.name = "virtio-console-pci",
+ .qdev.size = sizeof(VirtIOPCIProxy),
+ .init = virtio_console_init_pci,
+ .qdev.props = (Property[]) {
+ DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
+ DEFINE_PROP_END_OF_LIST(),
+ },
+ },{
+ .qdev.name = "virtio-balloon-pci",
+ .qdev.size = sizeof(VirtIOPCIProxy),
+ .init = virtio_balloon_init_pci,
+ },{
+ /* end of list */
+ }
+};
+
static void virtio_pci_register_devices(void)
{
- pci_qdev_register("virtio-blk-pci", sizeof(VirtIOPCIProxy),
- virtio_blk_init_pci);
- pci_qdev_register("virtio-net-pci", sizeof(VirtIOPCIProxy),
- virtio_net_init_pci);
- pci_qdev_register("virtio-console-pci", sizeof(VirtIOPCIProxy),
- virtio_console_init_pci);
- pci_qdev_register("virtio-balloon-pci", sizeof(VirtIOPCIProxy),
- virtio_balloon_init_pci);
+ pci_qdev_register_many(virtio_info);
}
device_init(virtio_pci_register_devices)
projects / qemu / blobdiff