All NICs have a cleanup function that, in most cases, zeroes the pointer to the NICState. In some cases, it frees data belonging to the NIC. However, this function is never called except when exiting from QEMU. It is not necessary to NULL pointers and free data here; the right place to do that would be in the device's unrealize function, after calling qemu_del_nic. Zeroing the NIC multiple times is also wrong for multiqueue devices. This cleanup function gets in the way of making the NetClientStates for the NIC hold an object_ref reference to the object, so get rid of it. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
184 lines
5.3 KiB
C
184 lines
5.3 KiB
C
/*
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* QEMU AMD PC-Net II (Am79C970A) emulation
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*
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* Copyright (c) 2004 Antony T Curtis
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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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/* This software was written to be compatible with the specification:
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* AMD Am79C970A PCnet-PCI II Ethernet Controller Data-Sheet
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* AMD Publication# 19436 Rev:E Amendment/0 Issue Date: June 2000
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*/
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/*
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* On Sparc32, this is the Lance (Am7990) part of chip STP2000 (Master I/O), also
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* produced as NCR89C100. See
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* http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C100.txt
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* and
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* http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR92C990.txt
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*/
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#include "hw/sysbus.h"
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#include "net/net.h"
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#include "qemu/timer.h"
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#include "qemu/sockets.h"
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#include "hw/sparc/sun4m.h"
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#include "pcnet.h"
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#include "trace.h"
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#include "sysemu/sysemu.h"
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#define TYPE_LANCE "lance"
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#define SYSBUS_PCNET(obj) \
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OBJECT_CHECK(SysBusPCNetState, (obj), TYPE_LANCE)
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typedef struct {
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SysBusDevice parent_obj;
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PCNetState state;
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} SysBusPCNetState;
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static void parent_lance_reset(void *opaque, int irq, int level)
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{
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SysBusPCNetState *d = opaque;
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if (level)
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pcnet_h_reset(&d->state);
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}
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static void lance_mem_write(void *opaque, hwaddr addr,
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uint64_t val, unsigned size)
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{
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SysBusPCNetState *d = opaque;
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trace_lance_mem_writew(addr, val & 0xffff);
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pcnet_ioport_writew(&d->state, addr, val & 0xffff);
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}
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static uint64_t lance_mem_read(void *opaque, hwaddr addr,
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unsigned size)
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{
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SysBusPCNetState *d = opaque;
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uint32_t val;
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val = pcnet_ioport_readw(&d->state, addr);
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trace_lance_mem_readw(addr, val & 0xffff);
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return val & 0xffff;
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}
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static const MemoryRegionOps lance_mem_ops = {
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.read = lance_mem_read,
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.write = lance_mem_write,
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.endianness = DEVICE_NATIVE_ENDIAN,
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.valid = {
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.min_access_size = 2,
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.max_access_size = 2,
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},
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};
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static NetClientInfo net_lance_info = {
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.type = NET_CLIENT_OPTIONS_KIND_NIC,
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.size = sizeof(NICState),
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.can_receive = pcnet_can_receive,
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.receive = pcnet_receive,
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.link_status_changed = pcnet_set_link_status,
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};
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static const VMStateDescription vmstate_lance = {
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.name = "pcnet",
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.version_id = 3,
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.minimum_version_id = 2,
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.fields = (VMStateField[]) {
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VMSTATE_STRUCT(state, SysBusPCNetState, 0, vmstate_pcnet, PCNetState),
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VMSTATE_END_OF_LIST()
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}
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};
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static int lance_init(SysBusDevice *sbd)
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{
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DeviceState *dev = DEVICE(sbd);
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SysBusPCNetState *d = SYSBUS_PCNET(dev);
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PCNetState *s = &d->state;
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memory_region_init_io(&s->mmio, OBJECT(d), &lance_mem_ops, d,
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"lance-mmio", 4);
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qdev_init_gpio_in(dev, parent_lance_reset, 1);
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sysbus_init_mmio(sbd, &s->mmio);
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sysbus_init_irq(sbd, &s->irq);
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s->phys_mem_read = ledma_memory_read;
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s->phys_mem_write = ledma_memory_write;
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return pcnet_common_init(dev, s, &net_lance_info);
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}
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static void lance_reset(DeviceState *dev)
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{
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SysBusPCNetState *d = SYSBUS_PCNET(dev);
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pcnet_h_reset(&d->state);
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}
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static void lance_instance_init(Object *obj)
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{
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SysBusPCNetState *d = SYSBUS_PCNET(obj);
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PCNetState *s = &d->state;
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device_add_bootindex_property(obj, &s->conf.bootindex,
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"bootindex", "/ethernet-phy@0",
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DEVICE(obj), NULL);
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}
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static Property lance_properties[] = {
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DEFINE_PROP_PTR("dma", SysBusPCNetState, state.dma_opaque),
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DEFINE_NIC_PROPERTIES(SysBusPCNetState, state.conf),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void lance_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
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k->init = lance_init;
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set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
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dc->fw_name = "ethernet";
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dc->reset = lance_reset;
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dc->vmsd = &vmstate_lance;
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dc->props = lance_properties;
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/* Reason: pointer property "dma" */
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dc->cannot_instantiate_with_device_add_yet = true;
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}
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static const TypeInfo lance_info = {
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.name = TYPE_LANCE,
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.parent = TYPE_SYS_BUS_DEVICE,
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.instance_size = sizeof(SysBusPCNetState),
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.class_init = lance_class_init,
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.instance_init = lance_instance_init,
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};
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static void lance_register_types(void)
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{
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type_register_static(&lance_info);
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}
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type_init(lance_register_types)
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