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