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qemu-e2k/hw/syborg_virtio.c

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/*
* Virtio Syborg bindings
*
* Copyright (c) 2009 CodeSourcery
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "syborg.h"
#include "sysbus.h"
#include "virtio.h"
#include "virtio-net.h"
#include "sysemu.h"
//#define DEBUG_SYBORG_VIRTIO
#ifdef DEBUG_SYBORG_VIRTIO
#define DPRINTF(fmt, ...) \
do { printf("syborg_virtio: " fmt , ## __VA_ARGS__); } while (0)
#define BADF(fmt, ...) \
do { fprintf(stderr, "syborg_virtio: error: " fmt , ## __VA_ARGS__); \
exit(1);} while (0)
#else
#define DPRINTF(fmt, ...) do {} while(0)
#define BADF(fmt, ...) \
do { fprintf(stderr, "syborg_virtio: error: " fmt , ## __VA_ARGS__);} while (0)
#endif
enum {
SYBORG_VIRTIO_ID = 0,
SYBORG_VIRTIO_DEVTYPE = 1,
SYBORG_VIRTIO_HOST_FEATURES = 2,
SYBORG_VIRTIO_GUEST_FEATURES = 3,
SYBORG_VIRTIO_QUEUE_BASE = 4,
SYBORG_VIRTIO_QUEUE_NUM = 5,
SYBORG_VIRTIO_QUEUE_SEL = 6,
SYBORG_VIRTIO_QUEUE_NOTIFY = 7,
SYBORG_VIRTIO_STATUS = 8,
SYBORG_VIRTIO_INT_ENABLE = 9,
SYBORG_VIRTIO_INT_STATUS = 10
};
#define SYBORG_VIRTIO_CONFIG 0x100
/* Device independent interface. */
typedef struct {
SysBusDevice busdev;
VirtIODevice *vdev;
qemu_irq irq;
uint32_t int_enable;
uint32_t id;
NICConf nic;
uint32_t host_features;
} SyborgVirtIOProxy;
static uint32_t syborg_virtio_readl(void *opaque, target_phys_addr_t offset)
{
SyborgVirtIOProxy *s = opaque;
VirtIODevice *vdev = s->vdev;
uint32_t ret;
DPRINTF("readl 0x%x\n", (int)offset);
if (offset >= SYBORG_VIRTIO_CONFIG) {
return virtio_config_readl(vdev, offset - SYBORG_VIRTIO_CONFIG);
}
switch(offset >> 2) {
case SYBORG_VIRTIO_ID:
ret = SYBORG_ID_VIRTIO;
break;
case SYBORG_VIRTIO_DEVTYPE:
ret = s->id;
break;
case SYBORG_VIRTIO_HOST_FEATURES:
ret = s->host_features;
break;
case SYBORG_VIRTIO_GUEST_FEATURES:
ret = vdev->guest_features;
break;
case SYBORG_VIRTIO_QUEUE_BASE:
ret = virtio_queue_get_addr(vdev, vdev->queue_sel);
break;
case SYBORG_VIRTIO_QUEUE_NUM:
ret = virtio_queue_get_num(vdev, vdev->queue_sel);
break;
case SYBORG_VIRTIO_QUEUE_SEL:
ret = vdev->queue_sel;
break;
case SYBORG_VIRTIO_STATUS:
ret = vdev->status;
break;
case SYBORG_VIRTIO_INT_ENABLE:
ret = s->int_enable;
break;
case SYBORG_VIRTIO_INT_STATUS:
ret = vdev->isr;
break;
default:
BADF("Bad read offset 0x%x\n", (int)offset);
return 0;
}
return ret;
}
static void syborg_virtio_writel(void *opaque, target_phys_addr_t offset,
uint32_t value)
{
SyborgVirtIOProxy *s = opaque;
VirtIODevice *vdev = s->vdev;
DPRINTF("writel 0x%x = 0x%x\n", (int)offset, value);
if (offset >= SYBORG_VIRTIO_CONFIG) {
return virtio_config_writel(vdev, offset - SYBORG_VIRTIO_CONFIG,
value);
}
switch (offset >> 2) {
case SYBORG_VIRTIO_GUEST_FEATURES:
if (vdev->set_features)
vdev->set_features(vdev, value);
vdev->guest_features = value;
break;
case SYBORG_VIRTIO_QUEUE_BASE:
if (value == 0)
virtio_reset(vdev);
else
virtio_queue_set_addr(vdev, vdev->queue_sel, value);
break;
case SYBORG_VIRTIO_QUEUE_SEL:
if (value < VIRTIO_PCI_QUEUE_MAX)
vdev->queue_sel = value;
break;
case SYBORG_VIRTIO_QUEUE_NOTIFY:
virtio_queue_notify(vdev, value);
break;
case SYBORG_VIRTIO_STATUS:
virtio_set_status(vdev, value & 0xFF);
if (vdev->status == 0)
virtio_reset(vdev);
break;
case SYBORG_VIRTIO_INT_ENABLE:
s->int_enable = value;
virtio_update_irq(vdev);
break;
case SYBORG_VIRTIO_INT_STATUS:
vdev->isr &= ~value;
virtio_update_irq(vdev);
break;
default:
BADF("Bad write offset 0x%x\n", (int)offset);
break;
}
}
static uint32_t syborg_virtio_readw(void *opaque, target_phys_addr_t offset)
{
SyborgVirtIOProxy *s = opaque;
VirtIODevice *vdev = s->vdev;
DPRINTF("readw 0x%x\n", (int)offset);
if (offset >= SYBORG_VIRTIO_CONFIG) {
return virtio_config_readw(vdev, offset - SYBORG_VIRTIO_CONFIG);
}
BADF("Bad halfword read offset 0x%x\n", (int)offset);
return -1;
}
static void syborg_virtio_writew(void *opaque, target_phys_addr_t offset,
uint32_t value)
{
SyborgVirtIOProxy *s = opaque;
VirtIODevice *vdev = s->vdev;
DPRINTF("writew 0x%x = 0x%x\n", (int)offset, value);
if (offset >= SYBORG_VIRTIO_CONFIG) {
return virtio_config_writew(vdev, offset - SYBORG_VIRTIO_CONFIG,
value);
}
BADF("Bad halfword write offset 0x%x\n", (int)offset);
}
static uint32_t syborg_virtio_readb(void *opaque, target_phys_addr_t offset)
{
SyborgVirtIOProxy *s = opaque;
VirtIODevice *vdev = s->vdev;
DPRINTF("readb 0x%x\n", (int)offset);
if (offset >= SYBORG_VIRTIO_CONFIG) {
return virtio_config_readb(vdev, offset - SYBORG_VIRTIO_CONFIG);
}
BADF("Bad byte read offset 0x%x\n", (int)offset);
return -1;
}
static void syborg_virtio_writeb(void *opaque, target_phys_addr_t offset,
uint32_t value)
{
SyborgVirtIOProxy *s = opaque;
VirtIODevice *vdev = s->vdev;
DPRINTF("writeb 0x%x = 0x%x\n", (int)offset, value);
if (offset >= SYBORG_VIRTIO_CONFIG) {
return virtio_config_writeb(vdev, offset - SYBORG_VIRTIO_CONFIG,
value);
}
BADF("Bad byte write offset 0x%x\n", (int)offset);
}
static CPUReadMemoryFunc * const syborg_virtio_readfn[] = {
syborg_virtio_readb,
syborg_virtio_readw,
syborg_virtio_readl
};
static CPUWriteMemoryFunc * const syborg_virtio_writefn[] = {
syborg_virtio_writeb,
syborg_virtio_writew,
syborg_virtio_writel
};
static void syborg_virtio_update_irq(void *opaque, uint16_t vector)
{
SyborgVirtIOProxy *proxy = opaque;
int level;
level = proxy->int_enable & proxy->vdev->isr;
DPRINTF("IRQ %d\n", level);
qemu_set_irq(proxy->irq, level != 0);
}
static unsigned syborg_virtio_get_features(void *opaque)
{
SyborgVirtIOProxy *proxy = opaque;
return proxy->host_features;
}
static VirtIOBindings syborg_virtio_bindings = {
.notify = syborg_virtio_update_irq,
.get_features = syborg_virtio_get_features,
};
static int syborg_virtio_init(SyborgVirtIOProxy *proxy, VirtIODevice *vdev)
{
int iomemtype;
proxy->vdev = vdev;
/* Don't support multiple vectors */
proxy->vdev->nvectors = 0;
sysbus_init_irq(&proxy->busdev, &proxy->irq);
iomemtype = cpu_register_io_memory(syborg_virtio_readfn,
syborg_virtio_writefn, proxy);
sysbus_init_mmio(&proxy->busdev, 0x1000, iomemtype);
proxy->id = ((uint32_t)0x1af4 << 16) | vdev->device_id;
qemu_register_reset(virtio_reset, vdev);
virtio_bind_device(vdev, &syborg_virtio_bindings, proxy);
proxy->host_features |= (0x1 << VIRTIO_F_NOTIFY_ON_EMPTY);
proxy->host_features = vdev->get_features(vdev, proxy->host_features);
return 0;
}
/* Device specific bindings. */
static int syborg_virtio_net_init(SysBusDevice *dev)
{
VirtIODevice *vdev;
SyborgVirtIOProxy *proxy = FROM_SYSBUS(SyborgVirtIOProxy, dev);
vdev = virtio_net_init(&dev->qdev, &proxy->nic);
return syborg_virtio_init(proxy, vdev);
}
static SysBusDeviceInfo syborg_virtio_net_info = {
.init = syborg_virtio_net_init,
.qdev.name = "syborg,virtio-net",
.qdev.size = sizeof(SyborgVirtIOProxy),
.qdev.props = (Property[]) {
DEFINE_NIC_PROPERTIES(SyborgVirtIOProxy, nic),
DEFINE_VIRTIO_NET_FEATURES(SyborgVirtIOProxy, host_features),
DEFINE_PROP_END_OF_LIST(),
}
};
static void syborg_virtio_register_devices(void)
{
sysbus_register_withprop(&syborg_virtio_net_info);
}
device_init(syborg_virtio_register_devices)
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