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Fix eepro100 simple transmission mode

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The simple transmission mode was treating the area immediately after the
transmit command block (TCB) as if it were a transmit buffer descriptor,
when in reality it is simply the packet data. This change simply copies
the data following the TCB into the packet buffer.

Signed-off-by: Mike Nawrocki <michael.nawrocki@gtri.gatech.edu>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Mike Nawrocki 2017-11-07 13:35:02 -05:00 committed by Jason Wang
parent 8fa5ad6dfb
commit 1865e288a8
1 changed files with 3 additions and 15 deletions
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18
hw/net/eepro100.c
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@ -774,23 +774,11 @@ static void tx_command(EEPRO100State *s)
}
assert(tcb_bytes <= sizeof(buf));
while (size < tcb_bytes) {
uint32_t tx_buffer_address = ldl_le_pci_dma(&s->dev, tbd_address);
uint16_t tx_buffer_size = lduw_le_pci_dma(&s->dev, tbd_address + 4);
#if 0
uint16_t tx_buffer_el = lduw_le_pci_dma(&s->dev, tbd_address + 6);
#endif
if (tx_buffer_size == 0) {
/* Prevent an endless loop. */
logout("loop in %s:%u\n", __FILE__, __LINE__);
break;
}
tbd_address += 8;
TRACE(RXTX, logout
("TBD (simplified mode): buffer address 0x%08x, size 0x%04x\n",
tx_buffer_address, tx_buffer_size));
tx_buffer_size = MIN(tx_buffer_size, sizeof(buf) - size);
pci_dma_read(&s->dev, tx_buffer_address, &buf[size], tx_buffer_size);
size += tx_buffer_size;
tbd_address, tcb_bytes));
pci_dma_read(&s->dev, tbd_address, &buf[size], tcb_bytes);
size += tcb_bytes;
}
if (tbd_array == 0xffffffff) {
/* Simplified mode. Was already handled by code above. */