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qemu-e2k/hw/net/pcnet-pci.c

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/*
* QEMU AMD PC-Net II (Am79C970A) PCI emulation
*
* Copyright (c) 2004 Antony T Curtis
*
* 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.
*/
/* This software was written to be compatible with the specification:
* AMD Am79C970A PCnet-PCI II Ethernet Controller Data-Sheet
* AMD Publication# 19436 Rev:E Amendment/0 Issue Date: June 2000
*/
#include "qemu/osdep.h"
#include "hw/pci/pci.h"
#include "net/net.h"
#include "qemu/timer.h"
#include "sysemu/dma.h"
#include "sysemu/sysemu.h"
#include "trace.h"
#include "pcnet.h"
//#define PCNET_DEBUG
//#define PCNET_DEBUG_IO
//#define PCNET_DEBUG_BCR
//#define PCNET_DEBUG_CSR
//#define PCNET_DEBUG_RMD
//#define PCNET_DEBUG_TMD
//#define PCNET_DEBUG_MATCH
#define TYPE_PCI_PCNET "pcnet"
#define PCI_PCNET(obj) \
OBJECT_CHECK(PCIPCNetState, (obj), TYPE_PCI_PCNET)
typedef struct {
/*< private >*/
PCIDevice parent_obj;
/*< public >*/
PCNetState state;
MemoryRegion io_bar;
} PCIPCNetState;
static void pcnet_aprom_writeb(void *opaque, uint32_t addr, uint32_t val)
{
PCNetState *s = opaque;
trace_pcnet_aprom_writeb(opaque, addr, val);
if (BCR_APROMWE(s)) {
s->prom[addr & 15] = val;
}
}
static uint32_t pcnet_aprom_readb(void *opaque, uint32_t addr)
{
PCNetState *s = opaque;
uint32_t val = s->prom[addr & 15];
trace_pcnet_aprom_readb(opaque, addr, val);
return val;
}
static uint64_t pcnet_ioport_read(void *opaque, hwaddr addr,
unsigned size)
{
PCNetState *d = opaque;
trace_pcnet_ioport_read(opaque, addr, size);
if (addr < 0x10) {
if (!BCR_DWIO(d) && size == 1) {
return pcnet_aprom_readb(d, addr);
} else if (!BCR_DWIO(d) && (addr & 1) == 0 && size == 2) {
return pcnet_aprom_readb(d, addr) |
(pcnet_aprom_readb(d, addr + 1) << 8);
} else if (BCR_DWIO(d) && (addr & 3) == 0 && size == 4) {
return pcnet_aprom_readb(d, addr) |
(pcnet_aprom_readb(d, addr + 1) << 8) |
(pcnet_aprom_readb(d, addr + 2) << 16) |
(pcnet_aprom_readb(d, addr + 3) << 24);
}
} else {
if (size == 2) {
return pcnet_ioport_readw(d, addr);
} else if (size == 4) {
return pcnet_ioport_readl(d, addr);
}
}
return ((uint64_t)1 << (size * 8)) - 1;
}
static void pcnet_ioport_write(void *opaque, hwaddr addr,
uint64_t data, unsigned size)
{
PCNetState *d = opaque;
trace_pcnet_ioport_write(opaque, addr, data, size);
if (addr < 0x10) {
if (!BCR_DWIO(d) && size == 1) {
pcnet_aprom_writeb(d, addr, data);
} else if (!BCR_DWIO(d) && (addr & 1) == 0 && size == 2) {
pcnet_aprom_writeb(d, addr, data & 0xff);
pcnet_aprom_writeb(d, addr + 1, data >> 8);
} else if (BCR_DWIO(d) && (addr & 3) == 0 && size == 4) {
pcnet_aprom_writeb(d, addr, data & 0xff);
pcnet_aprom_writeb(d, addr + 1, (data >> 8) & 0xff);
pcnet_aprom_writeb(d, addr + 2, (data >> 16) & 0xff);
pcnet_aprom_writeb(d, addr + 3, data >> 24);
}
} else {
if (size == 2) {
pcnet_ioport_writew(d, addr, data);
} else if (size == 4) {
pcnet_ioport_writel(d, addr, data);
}
}
}
static const MemoryRegionOps pcnet_io_ops = {
.read = pcnet_ioport_read,
.write = pcnet_ioport_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static const VMStateDescription vmstate_pci_pcnet = {
.name = "pcnet",
.version_id = 3,
.minimum_version_id = 2,
.fields = (VMStateField[]) {
VMSTATE_PCI_DEVICE(parent_obj, PCIPCNetState),
VMSTATE_STRUCT(state, PCIPCNetState, 0, vmstate_pcnet, PCNetState),
VMSTATE_END_OF_LIST()
}
};
/* PCI interface */
static const MemoryRegionOps pcnet_mmio_ops = {
.read = pcnet_ioport_read,
.write = pcnet_ioport_write,
.valid.min_access_size = 1,
.valid.max_access_size = 4,
.impl.min_access_size = 1,
.impl.max_access_size = 4,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void pci_physical_memory_write(void *dma_opaque, hwaddr addr,
uint8_t *buf, int len, int do_bswap)
{
pci_dma_write(dma_opaque, addr, buf, len);
}
static void pci_physical_memory_read(void *dma_opaque, hwaddr addr,
uint8_t *buf, int len, int do_bswap)
{
pci_dma_read(dma_opaque, addr, buf, len);
}
static void pci_pcnet_uninit(PCIDevice *dev)
{
PCIPCNetState *d = PCI_PCNET(dev);
qemu_free_irq(d->state.irq);
timer_del(d->state.poll_timer);
timer_free(d->state.poll_timer);
qemu_del_nic(d->state.nic);
}
static NetClientInfo net_pci_pcnet_info = {
.type = NET_CLIENT_DRIVER_NIC,
.size = sizeof(NICState),
.receive = pcnet_receive,
.link_status_changed = pcnet_set_link_status,
};
static void pci_pcnet_realize(PCIDevice *pci_dev, Error **errp)
{
PCIPCNetState *d = PCI_PCNET(pci_dev);
PCNetState *s = &d->state;
uint8_t *pci_conf;
#if 0
printf("sizeof(RMD)=%d, sizeof(TMD)=%d\n",
sizeof(struct pcnet_RMD), sizeof(struct pcnet_TMD));
#endif
pci_conf = pci_dev->config;
pci_set_word(pci_conf + PCI_STATUS,
PCI_STATUS_FAST_BACK | PCI_STATUS_DEVSEL_MEDIUM);
pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, 0x0);
pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, 0x0);
pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin A */
pci_conf[PCI_MIN_GNT] = 0x06;
pci_conf[PCI_MAX_LAT] = 0xff;
/* Handler for memory-mapped I/O */
memory_region_init_io(&d->state.mmio, OBJECT(d), &pcnet_mmio_ops, s,
"pcnet-mmio", PCNET_PNPMMIO_SIZE);
memory_region_init_io(&d->io_bar, OBJECT(d), &pcnet_io_ops, s, "pcnet-io",
PCNET_IOPORT_SIZE);
pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->io_bar);
pci_register_bar(pci_dev, 1, 0, &s->mmio);
s->irq = pci_allocate_irq(pci_dev);
s->phys_mem_read = pci_physical_memory_read;
s->phys_mem_write = pci_physical_memory_write;
s->dma_opaque = pci_dev;
pcnet_common_init(DEVICE(pci_dev), s, &net_pci_pcnet_info);
}
static void pci_reset(DeviceState *dev)
{
PCIPCNetState *d = PCI_PCNET(dev);
pcnet_h_reset(&d->state);
}
static void pcnet_instance_init(Object *obj)
{
PCIPCNetState *d = PCI_PCNET(obj);
PCNetState *s = &d->state;
device_add_bootindex_property(obj, &s->conf.bootindex,
"bootindex", "/ethernet-phy@0",
DEVICE(obj), NULL);
}
static Property pcnet_properties[] = {
DEFINE_NIC_PROPERTIES(PCIPCNetState, state.conf),
DEFINE_PROP_END_OF_LIST(),
};
static void pcnet_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->realize = pci_pcnet_realize;
k->exit = pci_pcnet_uninit;
k->romfile = "efi-pcnet.rom",
k->vendor_id = PCI_VENDOR_ID_AMD;
k->device_id = PCI_DEVICE_ID_AMD_LANCE;
k->revision = 0x10;
k->class_id = PCI_CLASS_NETWORK_ETHERNET;
dc->reset = pci_reset;
dc->vmsd = &vmstate_pci_pcnet;
dc->props = pcnet_properties;
set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
}
static const TypeInfo pcnet_info = {
.name = TYPE_PCI_PCNET,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(PCIPCNetState),
.class_init = pcnet_class_init,
.instance_init = pcnet_instance_init,
.interfaces = (InterfaceInfo[]) {
{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
{ },
},
};
static void pci_pcnet_register_types(void)
{
type_register_static(&pcnet_info);
}
type_init(pci_pcnet_register_types)
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