[PATCH v3 26/28] hw/i386/pc: use qemu_get_nic_info() and pci_init_nic_devices()

David Woodhouse
2023-10-25T14:51:16Z

From: David Woodhouse <dwmw@amazon.co.uk>

Eliminate direct access to nd_table[] and nb_nics by processing the the
ISA NICs first and then calling pci_init_nic_devices() for the test.

It's important to do this *before* the subsequent patch which registers
the Xen PV network devices, because the code being remove here didn't
check whether nd->instantiated was already set before using each entry.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
---
hw/i386/pc.c | 21 +++++++++++----------
include/hw/net/ne2000-isa.h | 2 --
2 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 11fed78d17..7d2ae2b3d7 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -652,8 +652,11 @@ static void pc_init_ne2k_isa(ISABus *bus, NICInfo *nd)
{
static int nb_ne2k = 0;

- if (nb_ne2k == NE2000_NB_MAX)
+ if (nb_ne2k == NE2000_NB_MAX) {
+ error_setg(&error_fatal,
+ "maximum number of ISA NE2000 devices exceeded");
return;
+ }
isa_ne2000_init(bus, ne2000_io[nb_ne2k],
ne2000_irq[nb_ne2k], nd);
nb_ne2k++;
@@ -1294,19 +1297,17 @@ void pc_basic_device_init(struct PCMachineState *pcms,
void pc_nic_init(PCMachineClass *pcmc, ISABus *isa_bus, PCIBus *pci_bus)
{
MachineClass *mc = MACHINE_CLASS(pcmc);
- int i;
+ bool default_is_ne2k = g_str_equal(mc->default_nic, TYPE_ISA_NE2000);
+ NICInfo *nd;

rom_set_order_override(FW_CFG_ORDER_OVERRIDE_NIC);
- for (i = 0; i < nb_nics; i++) {
- NICInfo *nd = &nd_table[i];
- const char *model = nd->model ? nd->model : mc->default_nic;

- if (g_str_equal(model, "ne2k_isa")) {
- pc_init_ne2k_isa(isa_bus, nd);
- } else {
- pci_nic_init_nofail(nd, pci_bus, model, NULL);
- }
+ while ((nd = qemu_find_nic_info(TYPE_ISA_NE2000, default_is_ne2k, NULL))) {
+ pc_init_ne2k_isa(isa_bus, nd);
}
+
+ pci_init_nic_devices(pci_bus, mc->default_nic);
+
rom_reset_order_override();
}

diff --git a/include/hw/net/ne2000-isa.h b/include/hw/net/ne2000-isa.h
index af59ee0b02..73bae10ad1 100644
--- a/include/hw/net/ne2000-isa.h
+++ b/include/hw/net/ne2000-isa.h
@@ -22,8 +22,6 @@ static inline ISADevice *isa_ne2000_init(ISABus *bus, int base, int irq,
{
ISADevice *d;

- qemu_check_nic_model(nd, "ne2k_isa");
-
d = isa_try_new(TYPE_ISA_NE2000);
if (d) {
DeviceState *dev = DEVICE(d);
--
2.40.1