2008-05-11 17:04:22 +02:00
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/*
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* QEMU ETRAX Ethernet Controller.
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*
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* Copyright (c) 2008 Edgar E. Iglesias, Axis Communications AB.
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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 <stdio.h>
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#include "hw.h"
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#include "net.h"
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#include "etraxfs_dma.h"
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#define D(x)
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2008-05-14 01:51:49 +02:00
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/*
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* The MDIO extensions in the TDK PHY model were reversed engineered from the
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* linux driver (PHYID and Diagnostics reg).
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* TODO: Add friendly names for the register nums.
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*/
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2008-05-11 17:04:22 +02:00
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struct qemu_phy
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{
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uint32_t regs[32];
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unsigned int (*read)(struct qemu_phy *phy, unsigned int req);
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2008-05-14 01:51:49 +02:00
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void (*write)(struct qemu_phy *phy, unsigned int req,
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unsigned int data);
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2008-05-11 17:04:22 +02:00
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};
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static unsigned int tdk_read(struct qemu_phy *phy, unsigned int req)
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{
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int regnum;
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unsigned r = 0;
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regnum = req & 0x1f;
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switch (regnum) {
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case 1:
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2008-05-18 10:50:32 +02:00
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/* MR1. */
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2008-05-11 17:04:22 +02:00
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/* Speeds and modes. */
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r |= (1 << 13) | (1 << 14);
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r |= (1 << 11) | (1 << 12);
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r |= (1 << 5); /* Autoneg complete. */
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2008-05-18 10:50:32 +02:00
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r |= (1 << 3); /* Autoneg able. */
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r |= (1 << 2); /* Link. */
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2008-05-11 17:04:22 +02:00
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break;
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2008-05-14 01:51:49 +02:00
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case 5:
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/* Link partner ability.
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We are kind; always agree with whatever best mode
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the guest advertises. */
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r = 1 << 14; /* Success. */
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/* Copy advertised modes. */
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r |= phy->regs[4] & (15 << 5);
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/* Autoneg support. */
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r |= 1;
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break;
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case 18:
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{
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/* Diagnostics reg. */
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int duplex = 0;
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int speed_100 = 0;
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/* Are we advertising 100 half or 100 duplex ? */
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speed_100 = !!(phy->regs[4] & 0x180);
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/* Are we advertising 10 duplex or 100 duplex ? */
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duplex = !!(phy->regs[4] & 0x180);
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r = (speed_100 << 10) | (duplex << 11);
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}
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break;
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2008-05-11 17:04:22 +02:00
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default:
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r = phy->regs[regnum];
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break;
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}
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2008-05-14 01:51:49 +02:00
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D(printf("\n%s %x = reg[%d]\n", __func__, r, regnum));
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2008-05-11 17:04:22 +02:00
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return r;
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}
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static void
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tdk_write(struct qemu_phy *phy, unsigned int req, unsigned int data)
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{
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int regnum;
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regnum = req & 0x1f;
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D(printf("%s reg[%d] = %x\n", __func__, regnum, data));
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switch (regnum) {
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default:
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phy->regs[regnum] = data;
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break;
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}
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}
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static void
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tdk_init(struct qemu_phy *phy)
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{
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2008-05-14 01:51:49 +02:00
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phy->regs[0] = 0x3100;
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/* PHY Id. */
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phy->regs[2] = 0x0300;
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phy->regs[3] = 0xe400;
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/* Autonegotiation advertisement reg. */
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phy->regs[4] = 0x01E1;
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2008-05-11 17:04:22 +02:00
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phy->read = tdk_read;
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phy->write = tdk_write;
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}
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struct qemu_mdio
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{
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2008-05-18 10:50:32 +02:00
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/* bus. */
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2008-05-11 17:04:22 +02:00
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int mdc;
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int mdio;
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/* decoder. */
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enum {
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PREAMBLE,
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SOF,
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OPC,
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ADDR,
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REQ,
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TURNAROUND,
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DATA
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} state;
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unsigned int drive;
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unsigned int cnt;
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unsigned int addr;
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unsigned int opc;
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unsigned int req;
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unsigned int data;
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struct qemu_phy *devs[32];
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};
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static void
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mdio_attach(struct qemu_mdio *bus, struct qemu_phy *phy, unsigned int addr)
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{
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bus->devs[addr & 0x1f] = phy;
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}
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2008-06-30 10:59:49 +02:00
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#ifdef USE_THIS_DEAD_CODE
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2008-05-11 17:04:22 +02:00
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static void
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mdio_detach(struct qemu_mdio *bus, struct qemu_phy *phy, unsigned int addr)
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{
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bus->devs[addr & 0x1f] = NULL;
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}
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2008-06-30 10:59:49 +02:00
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#endif
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2008-05-11 17:04:22 +02:00
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static void mdio_read_req(struct qemu_mdio *bus)
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{
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struct qemu_phy *phy;
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phy = bus->devs[bus->addr];
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if (phy && phy->read)
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bus->data = phy->read(phy, bus->req);
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else
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bus->data = 0xffff;
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}
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static void mdio_write_req(struct qemu_mdio *bus)
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{
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struct qemu_phy *phy;
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phy = bus->devs[bus->addr];
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if (phy && phy->write)
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phy->write(phy, bus->req, bus->data);
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}
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static void mdio_cycle(struct qemu_mdio *bus)
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{
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bus->cnt++;
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D(printf("mdc=%d mdio=%d state=%d cnt=%d drv=%d\n",
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bus->mdc, bus->mdio, bus->state, bus->cnt, bus->drive));
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#if 0
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if (bus->mdc)
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printf("%d", bus->mdio);
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#endif
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switch (bus->state)
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{
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case PREAMBLE:
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if (bus->mdc) {
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if (bus->cnt >= (32 * 2) && !bus->mdio) {
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bus->cnt = 0;
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bus->state = SOF;
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bus->data = 0;
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}
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}
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break;
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case SOF:
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if (bus->mdc) {
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if (bus->mdio != 1)
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printf("WARNING: no SOF\n");
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if (bus->cnt == 1*2) {
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bus->cnt = 0;
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bus->opc = 0;
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bus->state = OPC;
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}
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}
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break;
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case OPC:
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if (bus->mdc) {
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bus->opc <<= 1;
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bus->opc |= bus->mdio & 1;
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if (bus->cnt == 2*2) {
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bus->cnt = 0;
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bus->addr = 0;
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bus->state = ADDR;
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}
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}
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break;
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case ADDR:
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if (bus->mdc) {
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bus->addr <<= 1;
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bus->addr |= bus->mdio & 1;
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if (bus->cnt == 5*2) {
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bus->cnt = 0;
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bus->req = 0;
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bus->state = REQ;
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}
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}
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break;
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case REQ:
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if (bus->mdc) {
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bus->req <<= 1;
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bus->req |= bus->mdio & 1;
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if (bus->cnt == 5*2) {
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bus->cnt = 0;
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bus->state = TURNAROUND;
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}
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}
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break;
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case TURNAROUND:
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if (bus->mdc && bus->cnt == 2*2) {
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bus->mdio = 0;
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bus->cnt = 0;
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if (bus->opc == 2) {
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bus->drive = 1;
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mdio_read_req(bus);
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bus->mdio = bus->data & 1;
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}
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bus->state = DATA;
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}
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break;
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case DATA:
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if (!bus->mdc) {
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if (bus->drive) {
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2008-05-14 01:51:49 +02:00
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bus->mdio = !!(bus->data & (1 << 15));
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bus->data <<= 1;
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2008-05-11 17:04:22 +02:00
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}
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} else {
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if (!bus->drive) {
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bus->data <<= 1;
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bus->data |= bus->mdio;
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}
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if (bus->cnt == 16 * 2) {
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bus->cnt = 0;
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bus->state = PREAMBLE;
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2008-05-14 01:51:49 +02:00
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if (!bus->drive)
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mdio_write_req(bus);
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bus->drive = 0;
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2008-05-11 17:04:22 +02:00
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}
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}
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break;
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default:
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break;
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}
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}
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2008-05-14 01:51:49 +02:00
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/* ETRAX-FS Ethernet MAC block starts here. */
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2008-05-18 10:50:32 +02:00
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#define RW_MA0_LO 0x00
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#define RW_MA0_HI 0x04
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#define RW_MA1_LO 0x08
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#define RW_MA1_HI 0x0c
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#define RW_GA_LO 0x10
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#define RW_GA_HI 0x14
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#define RW_GEN_CTRL 0x18
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#define RW_REC_CTRL 0x1c
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#define RW_TR_CTRL 0x20
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#define RW_CLR_ERR 0x24
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#define RW_MGM_CTRL 0x28
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#define R_STAT 0x2c
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#define FS_ETH_MAX_REGS 0x5c
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2008-05-11 17:04:22 +02:00
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struct fs_eth
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{
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2008-05-18 10:50:32 +02:00
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CPUState *env;
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2008-05-11 17:04:22 +02:00
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qemu_irq *irq;
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2008-05-18 10:50:32 +02:00
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target_phys_addr_t base;
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2008-05-11 17:04:22 +02:00
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VLANClientState *vc;
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int ethregs;
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2008-05-18 10:50:32 +02:00
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/* Two addrs in the filter. */
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uint8_t macaddr[2][6];
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2008-05-11 17:04:22 +02:00
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uint32_t regs[FS_ETH_MAX_REGS];
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unsigned char rx_fifo[1536];
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int rx_fifo_len;
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int rx_fifo_pos;
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struct etraxfs_dma_client *dma_out;
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struct etraxfs_dma_client *dma_in;
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/* MDIO bus. */
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struct qemu_mdio mdio_bus;
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2008-05-18 10:50:32 +02:00
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/* PHY. */
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2008-05-11 17:04:22 +02:00
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struct qemu_phy phy;
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};
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static uint32_t eth_rinvalid (void *opaque, target_phys_addr_t addr)
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{
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2008-05-18 10:50:32 +02:00
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struct fs_eth *eth = opaque;
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CPUState *env = eth->env;
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2008-06-30 10:59:49 +02:00
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cpu_abort(env, "Unsupported short access. reg=" TARGET_FMT_plx
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" pc=%x.\n", addr, env->pc);
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2008-05-18 10:50:32 +02:00
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return 0;
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2008-05-11 17:04:22 +02:00
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}
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static uint32_t eth_readl (void *opaque, target_phys_addr_t addr)
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{
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2008-05-18 10:50:32 +02:00
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struct fs_eth *eth = opaque;
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D(CPUState *env = eth->env);
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uint32_t r = 0;
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2008-05-11 17:04:22 +02:00
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2008-05-18 10:50:32 +02:00
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/* Make addr relative to this instances base. */
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addr -= eth->base;
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switch (addr) {
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2008-05-11 17:04:22 +02:00
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case R_STAT:
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/* Attach an MDIO/PHY abstraction. */
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r = eth->mdio_bus.mdio & 1;
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break;
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2008-05-18 10:50:32 +02:00
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default:
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2008-05-11 17:04:22 +02:00
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r = eth->regs[addr];
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2008-05-18 10:50:32 +02:00
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D(printf ("%s %x p=%x\n", __func__, addr, env->pc));
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break;
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}
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return r;
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2008-05-11 17:04:22 +02:00
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}
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static void
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eth_winvalid (void *opaque, target_phys_addr_t addr, uint32_t value)
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{
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2008-05-18 10:50:32 +02:00
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|
struct fs_eth *eth = opaque;
|
|
|
|
CPUState *env = eth->env;
|
2008-06-30 10:59:49 +02:00
|
|
|
cpu_abort(env, "Unsupported short access. reg=" TARGET_FMT_plx
|
|
|
|
" pc=%x.\n", addr, env->pc);
|
2008-05-18 10:50:32 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
static void eth_update_ma(struct fs_eth *eth, int ma)
|
|
|
|
{
|
|
|
|
int reg;
|
|
|
|
int i = 0;
|
|
|
|
|
|
|
|
ma &= 1;
|
|
|
|
|
|
|
|
reg = RW_MA0_LO;
|
|
|
|
if (ma)
|
|
|
|
reg = RW_MA1_LO;
|
|
|
|
|
|
|
|
eth->macaddr[ma][i++] = eth->regs[reg];
|
|
|
|
eth->macaddr[ma][i++] = eth->regs[reg] >> 8;
|
|
|
|
eth->macaddr[ma][i++] = eth->regs[reg] >> 16;
|
|
|
|
eth->macaddr[ma][i++] = eth->regs[reg] >> 24;
|
|
|
|
eth->macaddr[ma][i++] = eth->regs[reg + 4];
|
|
|
|
eth->macaddr[ma][i++] = eth->regs[reg + 4] >> 8;
|
|
|
|
|
|
|
|
D(printf("set mac%d=%x.%x.%x.%x.%x.%x\n", ma,
|
|
|
|
eth->macaddr[ma][0], eth->macaddr[ma][1],
|
|
|
|
eth->macaddr[ma][2], eth->macaddr[ma][3],
|
|
|
|
eth->macaddr[ma][4], eth->macaddr[ma][5]));
|
2008-05-11 17:04:22 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
eth_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
|
|
|
|
{
|
2008-05-18 10:50:32 +02:00
|
|
|
struct fs_eth *eth = opaque;
|
|
|
|
|
|
|
|
/* Make addr relative to this instances base. */
|
|
|
|
addr -= eth->base;
|
|
|
|
switch (addr)
|
|
|
|
{
|
|
|
|
case RW_MA0_LO:
|
|
|
|
eth->regs[addr] = value;
|
|
|
|
eth_update_ma(eth, 0);
|
|
|
|
break;
|
|
|
|
case RW_MA0_HI:
|
|
|
|
eth->regs[addr] = value;
|
|
|
|
eth_update_ma(eth, 0);
|
|
|
|
break;
|
|
|
|
case RW_MA1_LO:
|
|
|
|
eth->regs[addr] = value;
|
|
|
|
eth_update_ma(eth, 1);
|
|
|
|
break;
|
|
|
|
case RW_MA1_HI:
|
|
|
|
eth->regs[addr] = value;
|
|
|
|
eth_update_ma(eth, 1);
|
|
|
|
break;
|
2008-05-11 17:04:22 +02:00
|
|
|
|
|
|
|
case RW_MGM_CTRL:
|
|
|
|
/* Attach an MDIO/PHY abstraction. */
|
|
|
|
if (value & 2)
|
|
|
|
eth->mdio_bus.mdio = value & 1;
|
|
|
|
if (eth->mdio_bus.mdc != (value & 4))
|
|
|
|
mdio_cycle(ð->mdio_bus);
|
|
|
|
eth->mdio_bus.mdc = !!(value & 4);
|
|
|
|
break;
|
|
|
|
|
2008-05-18 10:50:32 +02:00
|
|
|
default:
|
|
|
|
eth->regs[addr] = value;
|
2008-05-27 23:05:21 +02:00
|
|
|
D(printf ("%s %x %x\n",
|
|
|
|
__func__, addr, value));
|
2008-05-18 10:50:32 +02:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* The ETRAX FS has a groupt address table (GAT) which works like a k=1 bloom
|
|
|
|
filter dropping group addresses we have not joined. The filter has 64
|
|
|
|
bits (m). The has function is a simple nible xor of the group addr. */
|
|
|
|
static int eth_match_groupaddr(struct fs_eth *eth, const unsigned char *sa)
|
|
|
|
{
|
|
|
|
unsigned int hsh;
|
|
|
|
int m_individual = eth->regs[RW_REC_CTRL] & 4;
|
|
|
|
int match;
|
|
|
|
|
|
|
|
/* First bit on the wire of a MAC address signals multicast or
|
|
|
|
physical address. */
|
|
|
|
if (!m_individual && !sa[0] & 1)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* Calculate the hash index for the GA registers. */
|
|
|
|
hsh = 0;
|
|
|
|
hsh ^= (*sa) & 0x3f;
|
|
|
|
hsh ^= ((*sa) >> 6) & 0x03;
|
|
|
|
++sa;
|
|
|
|
hsh ^= ((*sa) << 2) & 0x03c;
|
|
|
|
hsh ^= ((*sa) >> 4) & 0xf;
|
|
|
|
++sa;
|
|
|
|
hsh ^= ((*sa) << 4) & 0x30;
|
|
|
|
hsh ^= ((*sa) >> 2) & 0x3f;
|
|
|
|
++sa;
|
|
|
|
hsh ^= (*sa) & 0x3f;
|
|
|
|
hsh ^= ((*sa) >> 6) & 0x03;
|
|
|
|
++sa;
|
|
|
|
hsh ^= ((*sa) << 2) & 0x03c;
|
|
|
|
hsh ^= ((*sa) >> 4) & 0xf;
|
|
|
|
++sa;
|
|
|
|
hsh ^= ((*sa) << 4) & 0x30;
|
|
|
|
hsh ^= ((*sa) >> 2) & 0x3f;
|
|
|
|
|
|
|
|
hsh &= 63;
|
|
|
|
if (hsh > 31)
|
|
|
|
match = eth->regs[RW_GA_HI] & (1 << (hsh - 32));
|
|
|
|
else
|
|
|
|
match = eth->regs[RW_GA_LO] & (1 << hsh);
|
|
|
|
D(printf("hsh=%x ga=%x.%x mtch=%d\n", hsh,
|
|
|
|
eth->regs[RW_GA_HI], eth->regs[RW_GA_LO], match));
|
|
|
|
return match;
|
2008-05-11 17:04:22 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
static int eth_can_receive(void *opaque)
|
|
|
|
{
|
|
|
|
struct fs_eth *eth = opaque;
|
|
|
|
int r;
|
|
|
|
|
|
|
|
r = eth->rx_fifo_len == 0;
|
|
|
|
if (!r) {
|
|
|
|
/* TODO: signal fifo overrun. */
|
|
|
|
printf("PACKET LOSS!\n");
|
|
|
|
}
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void eth_receive(void *opaque, const uint8_t *buf, int size)
|
|
|
|
{
|
2008-05-18 10:50:32 +02:00
|
|
|
unsigned char sa_bcast[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
|
2008-05-11 17:04:22 +02:00
|
|
|
struct fs_eth *eth = opaque;
|
2008-05-18 10:50:32 +02:00
|
|
|
int use_ma0 = eth->regs[RW_REC_CTRL] & 1;
|
|
|
|
int use_ma1 = eth->regs[RW_REC_CTRL] & 2;
|
|
|
|
int r_bcast = eth->regs[RW_REC_CTRL] & 8;
|
|
|
|
|
|
|
|
if (size < 12)
|
|
|
|
return;
|
|
|
|
|
|
|
|
D(printf("%x.%x.%x.%x.%x.%x ma=%d %d bc=%d\n",
|
|
|
|
buf[0], buf[1], buf[2], buf[3], buf[4], buf[5],
|
|
|
|
use_ma0, use_ma1, r_bcast));
|
|
|
|
|
|
|
|
/* Does the frame get through the address filters? */
|
|
|
|
if ((!use_ma0 || memcmp(buf, eth->macaddr[0], 6))
|
|
|
|
&& (!use_ma1 || memcmp(buf, eth->macaddr[1], 6))
|
|
|
|
&& (!r_bcast || memcmp(buf, sa_bcast, 6))
|
|
|
|
&& !eth_match_groupaddr(eth, buf))
|
|
|
|
return;
|
|
|
|
|
2008-05-11 17:04:22 +02:00
|
|
|
if (size > sizeof(eth->rx_fifo)) {
|
2008-05-18 10:50:32 +02:00
|
|
|
/* TODO: signal error. */
|
|
|
|
} else if (eth->rx_fifo_len) {
|
|
|
|
/* FIFO overrun. */
|
2008-05-11 17:04:22 +02:00
|
|
|
} else {
|
|
|
|
memcpy(eth->rx_fifo, buf, size);
|
2008-05-18 10:50:32 +02:00
|
|
|
/* +4, HW passes the CRC to sw. */
|
2008-05-11 17:04:22 +02:00
|
|
|
eth->rx_fifo_len = size + 4;
|
|
|
|
eth->rx_fifo_pos = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void eth_rx_pull(void *opaque)
|
|
|
|
{
|
|
|
|
struct fs_eth *eth = opaque;
|
|
|
|
int len;
|
|
|
|
if (eth->rx_fifo_len) {
|
|
|
|
D(printf("%s %d\n", __func__, eth->rx_fifo_len));
|
|
|
|
#if 0
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
for (i = 0; i < 32; i++)
|
|
|
|
printf("%2.2x", eth->rx_fifo[i]);
|
|
|
|
printf("\n");
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
len = etraxfs_dmac_input(eth->dma_in,
|
|
|
|
eth->rx_fifo + eth->rx_fifo_pos,
|
|
|
|
eth->rx_fifo_len, 1);
|
|
|
|
eth->rx_fifo_len -= len;
|
|
|
|
eth->rx_fifo_pos += len;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static int eth_tx_push(void *opaque, unsigned char *buf, int len)
|
|
|
|
{
|
|
|
|
struct fs_eth *eth = opaque;
|
|
|
|
|
|
|
|
D(printf("%s buf=%p len=%d\n", __func__, buf, len));
|
|
|
|
qemu_send_packet(eth->vc, buf, len);
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
static CPUReadMemoryFunc *eth_read[] = {
|
2008-05-14 01:51:49 +02:00
|
|
|
ð_rinvalid,
|
|
|
|
ð_rinvalid,
|
|
|
|
ð_readl,
|
2008-05-11 17:04:22 +02:00
|
|
|
};
|
|
|
|
|
|
|
|
static CPUWriteMemoryFunc *eth_write[] = {
|
2008-05-14 01:51:49 +02:00
|
|
|
ð_winvalid,
|
|
|
|
ð_winvalid,
|
|
|
|
ð_writel,
|
2008-05-11 17:04:22 +02:00
|
|
|
};
|
|
|
|
|
|
|
|
void *etraxfs_eth_init(NICInfo *nd, CPUState *env,
|
|
|
|
qemu_irq *irq, target_phys_addr_t base)
|
|
|
|
{
|
|
|
|
struct etraxfs_dma_client *dma = NULL;
|
|
|
|
struct fs_eth *eth = NULL;
|
|
|
|
|
|
|
|
dma = qemu_mallocz(sizeof *dma * 2);
|
|
|
|
if (!dma)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
eth = qemu_mallocz(sizeof *eth);
|
|
|
|
if (!eth)
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
dma[0].client.push = eth_tx_push;
|
|
|
|
dma[0].client.opaque = eth;
|
|
|
|
dma[1].client.opaque = eth;
|
|
|
|
dma[1].client.pull = eth_rx_pull;
|
|
|
|
|
|
|
|
eth->env = env;
|
|
|
|
eth->base = base;
|
|
|
|
eth->irq = irq;
|
|
|
|
eth->dma_out = dma;
|
|
|
|
eth->dma_in = dma + 1;
|
|
|
|
|
|
|
|
/* Connect the phy. */
|
|
|
|
tdk_init(ð->phy);
|
|
|
|
mdio_attach(ð->mdio_bus, ð->phy, 0x1);
|
|
|
|
|
|
|
|
eth->ethregs = cpu_register_io_memory(0, eth_read, eth_write, eth);
|
|
|
|
cpu_register_physical_memory (base, 0x5c, eth->ethregs);
|
|
|
|
|
|
|
|
eth->vc = qemu_new_vlan_client(nd->vlan,
|
|
|
|
eth_receive, eth_can_receive, eth);
|
|
|
|
|
|
|
|
return dma;
|
|
|
|
err:
|
|
|
|
qemu_free(eth);
|
|
|
|
qemu_free(dma);
|
|
|
|
return NULL;
|
|
|
|
}
|