[RFC v5 42/86] virtio-pci: convert to memory API

Avi Kivity
2011-07-20T16:51:00Z

except msix.

[jan: fix build]

Signed-off-by: Avi Kivity <avi@redhat.com>
---
hw/virtio-pci.c | 74 ++++++++++++++++++++++--------------------------------
hw/virtio-pci.h | 2 +-
2 files changed, 31 insertions(+), 45 deletions(-)

diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c
index d685243..c114e1a 100644
--- a/hw/virtio-pci.c
+++ b/hw/virtio-pci.c
@@ -161,7 +161,8 @@ static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy,
{
VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
- int r;
+ int r = 0;
+
if (assign) {
r = event_notifier_init(notifier, 1);
if (r < 0) {
@@ -169,24 +170,11 @@ static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy,
__func__, r);
return r;
}
- r = kvm_set_ioeventfd_pio_word(event_notifier_get_fd(notifier),
- proxy->addr + VIRTIO_PCI_QUEUE_NOTIFY,
- n, assign);
- if (r < 0) {
- error_report("%s: unable to map ioeventfd: %d",
- __func__, r);
- event_notifier_cleanup(notifier);
- }
+ memory_region_add_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2,
+ true, n, event_notifier_get_fd(notifier));
} else {
- r = kvm_set_ioeventfd_pio_word(event_notifier_get_fd(notifier),
- proxy->addr + VIRTIO_PCI_QUEUE_NOTIFY,
- n, assign);
- if (r < 0) {
- error_report("%s: unable to unmap ioeventfd: %d",
- __func__, r);
- return r;
- }
-
+ memory_region_del_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2,
+ true, n, event_notifier_get_fd(notifier));
/* Handle the race condition where the guest kicked and we deassigned
* before we got around to handling the kick.
*/
@@ -423,7 +411,6 @@ static uint32_t virtio_pci_config_readb(void *opaque, uint32_t addr)
{
VirtIOPCIProxy *proxy = opaque;
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
- addr -= proxy->addr;
if (addr < config)
return virtio_ioport_read(proxy, addr);
addr -= config;
@@ -434,7 +421,6 @@ static uint32_t virtio_pci_config_readw(void *opaque, uint32_t addr)
{
VirtIOPCIProxy *proxy = opaque;
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
- addr -= proxy->addr;
if (addr < config)
return virtio_ioport_read(proxy, addr);
addr -= config;
@@ -445,7 +431,6 @@ static uint32_t virtio_pci_config_readl(void *opaque, uint32_t addr)
{
VirtIOPCIProxy *proxy = opaque;
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
- addr -= proxy->addr;
if (addr < config)
return virtio_ioport_read(proxy, addr);
addr -= config;
@@ -456,7 +441,6 @@ static void virtio_pci_config_writeb(void *opaque, uint32_t addr, uint32_t val)
{
VirtIOPCIProxy *proxy = opaque;
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
- addr -= proxy->addr;
if (addr < config) {
virtio_ioport_write(proxy, addr, val);
return;
@@ -469,7 +453,6 @@ static void virtio_pci_config_writew(void *opaque, uint32_t addr, uint32_t val)
{
VirtIOPCIProxy *proxy = opaque;
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
- addr -= proxy->addr;
if (addr < config) {
virtio_ioport_write(proxy, addr, val);
return;
@@ -482,7 +465,6 @@ static void virtio_pci_config_writel(void *opaque, uint32_t addr, uint32_t val)
{
VirtIOPCIProxy *proxy = opaque;
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
- addr -= proxy->addr;
if (addr < config) {
virtio_ioport_write(proxy, addr, val);
return;
@@ -491,30 +473,26 @@ static void virtio_pci_config_writel(void *opaque, uint32_t addr, uint32_t val)
virtio_config_writel(proxy->vdev, addr, val);
}

-static void virtio_map(PCIDevice *pci_dev, int region_num,
- pcibus_t addr, pcibus_t size, int type)
-{
- VirtIOPCIProxy *proxy = container_of(pci_dev, VirtIOPCIProxy, pci_dev);
- VirtIODevice *vdev = proxy->vdev;
- unsigned config_len = VIRTIO_PCI_REGION_SIZE(pci_dev) + vdev->config_len;
-
- proxy->addr = addr;
-
- 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);
+const MemoryRegionPortio virtio_portio[] = {
+ { 0, 0x10000, 1, .write = virtio_pci_config_writeb, },
+ { 0, 0x10000, 2, .write = virtio_pci_config_writew, },
+ { 0, 0x10000, 4, .write = virtio_pci_config_writel, },
+ { 0, 0x10000, 1, .read = virtio_pci_config_readb, },
+ { 0, 0x10000, 2, .read = virtio_pci_config_readw, },
+ { 0, 0x10000, 4, .read = virtio_pci_config_readl, },
+ PORTIO_END
+};

- if (vdev->config_len)
- vdev->get_config(vdev, vdev->config);
-}
+static const MemoryRegionOps virtio_pci_config_ops = {
+ .old_portio = virtio_portio,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+};

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);
+ VirtIODevice *vdev = proxy->vdev;

if (PCI_COMMAND == address) {
if (!(val & PCI_COMMAND_MASTER)) {
@@ -525,6 +503,9 @@ static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
}
}
}
+ if (address == PCI_BASE_ADDRESS_0 && vdev->config_len) {
+ vdev->get_config(vdev, vdev->config);
+ }

pci_default_write_config(pci_dev, address, val, len);
msix_write_config(pci_dev, address, val, len);
@@ -678,8 +659,10 @@ void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev)
if (size & (size-1))
size = 1 << qemu_fls(size);

- pci_register_bar(&proxy->pci_dev, 0, size, PCI_BASE_ADDRESS_SPACE_IO,
- virtio_map);
+ memory_region_init_io(&proxy->bar, &virtio_pci_config_ops, proxy,
+ "virtio-pci", size);
+ pci_register_bar_region(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
+ &proxy->bar);

if (!kvm_has_many_ioeventfds()) {
proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;
@@ -714,6 +697,9 @@ static int virtio_blk_init_pci(PCIDevice *pci_dev)

static int virtio_exit_pci(PCIDevice *pci_dev)
{
+ VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
+
+ memory_region_destroy(&proxy->bar);
return msix_uninit(pci_dev);
}

diff --git a/hw/virtio-pci.h b/hw/virtio-pci.h
index 1f0de56..5af1c8c 100644
--- a/hw/virtio-pci.h
+++ b/hw/virtio-pci.h
@@ -21,8 +21,8 @@
typedef struct {
PCIDevice pci_dev;
VirtIODevice *vdev;
+ MemoryRegion bar;
uint32_t flags;
- uint32_t addr;
uint32_t class_code;
uint32_t nvectors;
BlockConf block;
--
1.7.5.3