root / hw / net / spapr_llan.c @ e0ff466c
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/*
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* QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
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*
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* PAPR Inter-VM Logical Lan, aka ibmveth
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*
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* Copyright (c) 2010,2011 David Gibson, IBM Corporation.
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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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*/
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#include "hw/hw.h" |
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#include "net/net.h" |
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#include "hw/qdev.h" |
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#include "hw/ppc/spapr.h" |
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#include "hw/ppc/spapr_vio.h" |
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#include <libfdt.h> |
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#define ETH_ALEN 6 |
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#define MAX_PACKET_SIZE 65536 |
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/*#define DEBUG*/
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#ifdef DEBUG
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#define dprintf(fmt...) do { fprintf(stderr, fmt); } while (0) |
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#else
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#define dprintf(fmt...)
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#endif
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/*
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* Virtual LAN device
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*/
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typedef uint64_t vlan_bd_t;
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#define VLAN_BD_VALID 0x8000000000000000ULL |
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#define VLAN_BD_TOGGLE 0x4000000000000000ULL |
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#define VLAN_BD_NO_CSUM 0x0200000000000000ULL |
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#define VLAN_BD_CSUM_GOOD 0x0100000000000000ULL |
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#define VLAN_BD_LEN_MASK 0x00ffffff00000000ULL |
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#define VLAN_BD_LEN(bd) (((bd) & VLAN_BD_LEN_MASK) >> 32) |
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#define VLAN_BD_ADDR_MASK 0x00000000ffffffffULL |
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#define VLAN_BD_ADDR(bd) ((bd) & VLAN_BD_ADDR_MASK)
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#define VLAN_VALID_BD(addr, len) (VLAN_BD_VALID | \
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(((len) << 32) & VLAN_BD_LEN_MASK) | \
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(addr & VLAN_BD_ADDR_MASK)) |
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#define VLAN_RXQC_TOGGLE 0x80 |
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#define VLAN_RXQC_VALID 0x40 |
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#define VLAN_RXQC_NO_CSUM 0x02 |
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#define VLAN_RXQC_CSUM_GOOD 0x01 |
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#define VLAN_RQ_ALIGNMENT 16 |
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#define VLAN_RXQ_BD_OFF 0 |
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#define VLAN_FILTER_BD_OFF 8 |
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#define VLAN_RX_BDS_OFF 16 |
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#define VLAN_MAX_BUFS ((SPAPR_TCE_PAGE_SIZE - VLAN_RX_BDS_OFF) / 8) |
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#define TYPE_VIO_SPAPR_VLAN_DEVICE "spapr-vlan" |
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#define VIO_SPAPR_VLAN_DEVICE(obj) \
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OBJECT_CHECK(VIOsPAPRVLANDevice, (obj), TYPE_VIO_SPAPR_VLAN_DEVICE) |
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typedef struct VIOsPAPRVLANDevice { |
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VIOsPAPRDevice sdev; |
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NICConf nicconf; |
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NICState *nic; |
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int isopen;
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target_ulong buf_list; |
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int add_buf_ptr, use_buf_ptr, rx_bufs;
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target_ulong rxq_ptr; |
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} VIOsPAPRVLANDevice; |
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static int spapr_vlan_can_receive(NetClientState *nc) |
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{ |
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VIOsPAPRVLANDevice *dev = qemu_get_nic_opaque(nc); |
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return (dev->isopen && dev->rx_bufs > 0); |
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} |
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static ssize_t spapr_vlan_receive(NetClientState *nc, const uint8_t *buf, |
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size_t size) |
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{ |
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VIOsPAPRVLANDevice *dev = qemu_get_nic_opaque(nc); |
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VIOsPAPRDevice *sdev = VIO_SPAPR_DEVICE(dev); |
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vlan_bd_t rxq_bd = vio_ldq(sdev, dev->buf_list + VLAN_RXQ_BD_OFF); |
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vlan_bd_t bd; |
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int buf_ptr = dev->use_buf_ptr;
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uint64_t handle; |
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uint8_t control; |
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dprintf("spapr_vlan_receive() [%s] rx_bufs=%d\n", sdev->qdev.id,
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dev->rx_bufs); |
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if (!dev->isopen) {
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return -1; |
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} |
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if (!dev->rx_bufs) {
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return -1; |
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} |
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do {
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buf_ptr += 8;
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if (buf_ptr >= SPAPR_TCE_PAGE_SIZE) {
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buf_ptr = VLAN_RX_BDS_OFF; |
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} |
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bd = vio_ldq(sdev, dev->buf_list + buf_ptr); |
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dprintf("use_buf_ptr=%d bd=0x%016llx\n",
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buf_ptr, (unsigned long long)bd); |
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} while ((!(bd & VLAN_BD_VALID) || (VLAN_BD_LEN(bd) < (size + 8))) |
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&& (buf_ptr != dev->use_buf_ptr)); |
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if (!(bd & VLAN_BD_VALID) || (VLAN_BD_LEN(bd) < (size + 8))) { |
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/* Failed to find a suitable buffer */
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return -1; |
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} |
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/* Remove the buffer from the pool */
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dev->rx_bufs--; |
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dev->use_buf_ptr = buf_ptr; |
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vio_stq(sdev, dev->buf_list + dev->use_buf_ptr, 0);
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dprintf("Found buffer: ptr=%d num=%d\n", dev->use_buf_ptr, dev->rx_bufs);
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/* Transfer the packet data */
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if (spapr_vio_dma_write(sdev, VLAN_BD_ADDR(bd) + 8, buf, size) < 0) { |
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return -1; |
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} |
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dprintf("spapr_vlan_receive: DMA write completed\n");
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/* Update the receive queue */
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control = VLAN_RXQC_TOGGLE | VLAN_RXQC_VALID; |
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if (rxq_bd & VLAN_BD_TOGGLE) {
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control ^= VLAN_RXQC_TOGGLE; |
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} |
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handle = vio_ldq(sdev, VLAN_BD_ADDR(bd)); |
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vio_stq(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr + 8, handle);
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vio_stl(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr + 4, size);
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vio_sth(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr + 2, 8); |
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vio_stb(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr, control); |
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dprintf("wrote rxq entry (ptr=0x%llx): 0x%016llx 0x%016llx\n",
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(unsigned long long)dev->rxq_ptr, |
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(unsigned long long)vio_ldq(sdev, VLAN_BD_ADDR(rxq_bd) + |
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dev->rxq_ptr), |
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(unsigned long long)vio_ldq(sdev, VLAN_BD_ADDR(rxq_bd) + |
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dev->rxq_ptr + 8));
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dev->rxq_ptr += 16;
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if (dev->rxq_ptr >= VLAN_BD_LEN(rxq_bd)) {
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dev->rxq_ptr = 0;
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vio_stq(sdev, dev->buf_list + VLAN_RXQ_BD_OFF, rxq_bd ^ VLAN_BD_TOGGLE); |
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} |
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if (sdev->signal_state & 1) { |
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qemu_irq_pulse(spapr_vio_qirq(sdev)); |
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} |
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return size;
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} |
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static void spapr_vlan_cleanup(NetClientState *nc) |
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{ |
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VIOsPAPRVLANDevice *dev = qemu_get_nic_opaque(nc); |
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dev->nic = NULL;
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} |
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static NetClientInfo net_spapr_vlan_info = {
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.type = NET_CLIENT_OPTIONS_KIND_NIC, |
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.size = sizeof(NICState),
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.can_receive = spapr_vlan_can_receive, |
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.receive = spapr_vlan_receive, |
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.cleanup = spapr_vlan_cleanup, |
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}; |
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static void spapr_vlan_reset(VIOsPAPRDevice *sdev) |
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{ |
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VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(sdev); |
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dev->buf_list = 0;
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dev->rx_bufs = 0;
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dev->isopen = 0;
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} |
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static int spapr_vlan_init(VIOsPAPRDevice *sdev) |
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{ |
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VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(sdev); |
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qemu_macaddr_default_if_unset(&dev->nicconf.macaddr); |
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dev->nic = qemu_new_nic(&net_spapr_vlan_info, &dev->nicconf, |
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object_get_typename(OBJECT(sdev)), sdev->qdev.id, dev); |
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qemu_format_nic_info_str(qemu_get_queue(dev->nic), dev->nicconf.macaddr.a); |
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return 0; |
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} |
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void spapr_vlan_create(VIOsPAPRBus *bus, NICInfo *nd)
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{ |
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DeviceState *dev; |
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dev = qdev_create(&bus->bus, "spapr-vlan");
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qdev_set_nic_properties(dev, nd); |
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qdev_init_nofail(dev); |
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} |
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static int spapr_vlan_devnode(VIOsPAPRDevice *dev, void *fdt, int node_off) |
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{ |
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VIOsPAPRVLANDevice *vdev = VIO_SPAPR_VLAN_DEVICE(dev); |
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uint8_t padded_mac[8] = {0, 0}; |
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int ret;
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/* Some old phyp versions give the mac address in an 8-byte
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* property. The kernel driver has an insane workaround for this;
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* rather than doing the obvious thing and checking the property
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* length, it checks whether the first byte has 0b10 in the low
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* bits. If a correct 6-byte property has a different first byte
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* the kernel will get the wrong mac address, overrunning its
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* buffer in the process (read only, thank goodness).
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*
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* Here we workaround the kernel workaround by always supplying an
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* 8-byte property, with the mac address in the last six bytes */
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memcpy(&padded_mac[2], &vdev->nicconf.macaddr, ETH_ALEN);
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ret = fdt_setprop(fdt, node_off, "local-mac-address",
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padded_mac, sizeof(padded_mac));
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if (ret < 0) { |
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return ret;
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} |
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ret = fdt_setprop_cell(fdt, node_off, "ibm,mac-address-filters", 0); |
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if (ret < 0) { |
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return ret;
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} |
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return 0; |
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} |
260 |
|
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static int check_bd(VIOsPAPRVLANDevice *dev, vlan_bd_t bd, |
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target_ulong alignment) |
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{ |
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if ((VLAN_BD_ADDR(bd) % alignment)
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|| (VLAN_BD_LEN(bd) % alignment)) { |
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return -1; |
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} |
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if (!spapr_vio_dma_valid(&dev->sdev, VLAN_BD_ADDR(bd),
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VLAN_BD_LEN(bd), DMA_DIRECTION_FROM_DEVICE) |
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|| !spapr_vio_dma_valid(&dev->sdev, VLAN_BD_ADDR(bd), |
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VLAN_BD_LEN(bd), DMA_DIRECTION_TO_DEVICE)) { |
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return -1; |
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} |
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return 0; |
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} |
278 |
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static target_ulong h_register_logical_lan(PowerPCCPU *cpu,
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sPAPREnvironment *spapr, |
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target_ulong opcode, |
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target_ulong *args) |
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{ |
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target_ulong reg = args[0];
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target_ulong buf_list = args[1];
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target_ulong rec_queue = args[2];
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target_ulong filter_list = args[3];
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VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
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VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(sdev); |
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vlan_bd_t filter_list_bd; |
291 |
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if (!dev) {
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return H_PARAMETER;
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} |
295 |
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if (dev->isopen) {
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hcall_dprintf("H_REGISTER_LOGICAL_LAN called twice without "
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"H_FREE_LOGICAL_LAN\n");
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return H_RESOURCE;
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} |
301 |
|
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if (check_bd(dev, VLAN_VALID_BD(buf_list, SPAPR_TCE_PAGE_SIZE),
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SPAPR_TCE_PAGE_SIZE) < 0) {
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hcall_dprintf("Bad buf_list 0x" TARGET_FMT_lx "\n", buf_list); |
305 |
return H_PARAMETER;
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} |
307 |
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filter_list_bd = VLAN_VALID_BD(filter_list, SPAPR_TCE_PAGE_SIZE); |
309 |
if (check_bd(dev, filter_list_bd, SPAPR_TCE_PAGE_SIZE) < 0) { |
310 |
hcall_dprintf("Bad filter_list 0x" TARGET_FMT_lx "\n", filter_list); |
311 |
return H_PARAMETER;
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} |
313 |
|
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if (!(rec_queue & VLAN_BD_VALID)
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|| (check_bd(dev, rec_queue, VLAN_RQ_ALIGNMENT) < 0)) {
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hcall_dprintf("Bad receive queue\n");
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return H_PARAMETER;
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} |
319 |
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dev->buf_list = buf_list; |
321 |
sdev->signal_state = 0;
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322 |
|
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rec_queue &= ~VLAN_BD_TOGGLE; |
324 |
|
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/* Initialize the buffer list */
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vio_stq(sdev, buf_list, rec_queue); |
327 |
vio_stq(sdev, buf_list + 8, filter_list_bd);
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spapr_vio_dma_set(sdev, buf_list + VLAN_RX_BDS_OFF, 0,
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SPAPR_TCE_PAGE_SIZE - VLAN_RX_BDS_OFF); |
330 |
dev->add_buf_ptr = VLAN_RX_BDS_OFF - 8;
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dev->use_buf_ptr = VLAN_RX_BDS_OFF - 8;
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332 |
dev->rx_bufs = 0;
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dev->rxq_ptr = 0;
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334 |
|
335 |
/* Initialize the receive queue */
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spapr_vio_dma_set(sdev, VLAN_BD_ADDR(rec_queue), 0, VLAN_BD_LEN(rec_queue));
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337 |
|
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dev->isopen = 1;
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339 |
qemu_flush_queued_packets(qemu_get_queue(dev->nic)); |
340 |
|
341 |
return H_SUCCESS;
|
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} |
343 |
|
344 |
|
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static target_ulong h_free_logical_lan(PowerPCCPU *cpu, sPAPREnvironment *spapr,
|
346 |
target_ulong opcode, target_ulong *args) |
347 |
{ |
348 |
target_ulong reg = args[0];
|
349 |
VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
350 |
VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(sdev); |
351 |
|
352 |
if (!dev) {
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return H_PARAMETER;
|
354 |
} |
355 |
|
356 |
if (!dev->isopen) {
|
357 |
hcall_dprintf("H_FREE_LOGICAL_LAN called without "
|
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"H_REGISTER_LOGICAL_LAN\n");
|
359 |
return H_RESOURCE;
|
360 |
} |
361 |
|
362 |
spapr_vlan_reset(sdev); |
363 |
return H_SUCCESS;
|
364 |
} |
365 |
|
366 |
static target_ulong h_add_logical_lan_buffer(PowerPCCPU *cpu,
|
367 |
sPAPREnvironment *spapr, |
368 |
target_ulong opcode, |
369 |
target_ulong *args) |
370 |
{ |
371 |
target_ulong reg = args[0];
|
372 |
target_ulong buf = args[1];
|
373 |
VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
374 |
VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(sdev); |
375 |
vlan_bd_t bd; |
376 |
|
377 |
dprintf("H_ADD_LOGICAL_LAN_BUFFER(0x" TARGET_FMT_lx
|
378 |
", 0x" TARGET_FMT_lx ")\n", reg, buf); |
379 |
|
380 |
if (!sdev) {
|
381 |
hcall_dprintf("Bad device\n");
|
382 |
return H_PARAMETER;
|
383 |
} |
384 |
|
385 |
if ((check_bd(dev, buf, 4) < 0) |
386 |
|| (VLAN_BD_LEN(buf) < 16)) {
|
387 |
hcall_dprintf("Bad buffer enqueued\n");
|
388 |
return H_PARAMETER;
|
389 |
} |
390 |
|
391 |
if (!dev->isopen || dev->rx_bufs >= VLAN_MAX_BUFS) {
|
392 |
return H_RESOURCE;
|
393 |
} |
394 |
|
395 |
do {
|
396 |
dev->add_buf_ptr += 8;
|
397 |
if (dev->add_buf_ptr >= SPAPR_TCE_PAGE_SIZE) {
|
398 |
dev->add_buf_ptr = VLAN_RX_BDS_OFF; |
399 |
} |
400 |
|
401 |
bd = vio_ldq(sdev, dev->buf_list + dev->add_buf_ptr); |
402 |
} while (bd & VLAN_BD_VALID);
|
403 |
|
404 |
vio_stq(sdev, dev->buf_list + dev->add_buf_ptr, buf); |
405 |
|
406 |
dev->rx_bufs++; |
407 |
|
408 |
dprintf("h_add_logical_lan_buffer(): Added buf ptr=%d rx_bufs=%d"
|
409 |
" bd=0x%016llx\n", dev->add_buf_ptr, dev->rx_bufs,
|
410 |
(unsigned long long)buf); |
411 |
|
412 |
return H_SUCCESS;
|
413 |
} |
414 |
|
415 |
static target_ulong h_send_logical_lan(PowerPCCPU *cpu, sPAPREnvironment *spapr,
|
416 |
target_ulong opcode, target_ulong *args) |
417 |
{ |
418 |
target_ulong reg = args[0];
|
419 |
target_ulong *bufs = args + 1;
|
420 |
target_ulong continue_token = args[7];
|
421 |
VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
422 |
VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(sdev); |
423 |
unsigned total_len;
|
424 |
uint8_t *lbuf, *p; |
425 |
int i, nbufs;
|
426 |
int ret;
|
427 |
|
428 |
dprintf("H_SEND_LOGICAL_LAN(0x" TARGET_FMT_lx ", <bufs>, 0x" |
429 |
TARGET_FMT_lx ")\n", reg, continue_token);
|
430 |
|
431 |
if (!sdev) {
|
432 |
return H_PARAMETER;
|
433 |
} |
434 |
|
435 |
dprintf("rxbufs = %d\n", dev->rx_bufs);
|
436 |
|
437 |
if (!dev->isopen) {
|
438 |
return H_DROPPED;
|
439 |
} |
440 |
|
441 |
if (continue_token) {
|
442 |
return H_HARDWARE; /* FIXME actually handle this */ |
443 |
} |
444 |
|
445 |
total_len = 0;
|
446 |
for (i = 0; i < 6; i++) { |
447 |
dprintf(" buf desc: 0x" TARGET_FMT_lx "\n", bufs[i]); |
448 |
if (!(bufs[i] & VLAN_BD_VALID)) {
|
449 |
break;
|
450 |
} |
451 |
total_len += VLAN_BD_LEN(bufs[i]); |
452 |
} |
453 |
|
454 |
nbufs = i; |
455 |
dprintf("h_send_logical_lan() %d buffers, total length 0x%x\n",
|
456 |
nbufs, total_len); |
457 |
|
458 |
if (total_len == 0) { |
459 |
return H_SUCCESS;
|
460 |
} |
461 |
|
462 |
if (total_len > MAX_PACKET_SIZE) {
|
463 |
/* Don't let the guest force too large an allocation */
|
464 |
return H_RESOURCE;
|
465 |
} |
466 |
|
467 |
lbuf = alloca(total_len); |
468 |
p = lbuf; |
469 |
for (i = 0; i < nbufs; i++) { |
470 |
ret = spapr_vio_dma_read(sdev, VLAN_BD_ADDR(bufs[i]), |
471 |
p, VLAN_BD_LEN(bufs[i])); |
472 |
if (ret < 0) { |
473 |
return ret;
|
474 |
} |
475 |
|
476 |
p += VLAN_BD_LEN(bufs[i]); |
477 |
} |
478 |
|
479 |
qemu_send_packet(qemu_get_queue(dev->nic), lbuf, total_len); |
480 |
|
481 |
return H_SUCCESS;
|
482 |
} |
483 |
|
484 |
static target_ulong h_multicast_ctrl(PowerPCCPU *cpu, sPAPREnvironment *spapr,
|
485 |
target_ulong opcode, target_ulong *args) |
486 |
{ |
487 |
target_ulong reg = args[0];
|
488 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
489 |
|
490 |
if (!dev) {
|
491 |
return H_PARAMETER;
|
492 |
} |
493 |
|
494 |
return H_SUCCESS;
|
495 |
} |
496 |
|
497 |
static Property spapr_vlan_properties[] = {
|
498 |
DEFINE_SPAPR_PROPERTIES(VIOsPAPRVLANDevice, sdev), |
499 |
DEFINE_NIC_PROPERTIES(VIOsPAPRVLANDevice, nicconf), |
500 |
DEFINE_PROP_END_OF_LIST(), |
501 |
}; |
502 |
|
503 |
static void spapr_vlan_class_init(ObjectClass *klass, void *data) |
504 |
{ |
505 |
DeviceClass *dc = DEVICE_CLASS(klass); |
506 |
VIOsPAPRDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass); |
507 |
|
508 |
k->init = spapr_vlan_init; |
509 |
k->reset = spapr_vlan_reset; |
510 |
k->devnode = spapr_vlan_devnode; |
511 |
k->dt_name = "l-lan";
|
512 |
k->dt_type = "network";
|
513 |
k->dt_compatible = "IBM,l-lan";
|
514 |
k->signal_mask = 0x1;
|
515 |
dc->props = spapr_vlan_properties; |
516 |
k->rtce_window_size = 0x10000000;
|
517 |
} |
518 |
|
519 |
static const TypeInfo spapr_vlan_info = { |
520 |
.name = TYPE_VIO_SPAPR_VLAN_DEVICE, |
521 |
.parent = TYPE_VIO_SPAPR_DEVICE, |
522 |
.instance_size = sizeof(VIOsPAPRVLANDevice),
|
523 |
.class_init = spapr_vlan_class_init, |
524 |
}; |
525 |
|
526 |
static void spapr_vlan_register_types(void) |
527 |
{ |
528 |
spapr_register_hypercall(H_REGISTER_LOGICAL_LAN, h_register_logical_lan); |
529 |
spapr_register_hypercall(H_FREE_LOGICAL_LAN, h_free_logical_lan); |
530 |
spapr_register_hypercall(H_SEND_LOGICAL_LAN, h_send_logical_lan); |
531 |
spapr_register_hypercall(H_ADD_LOGICAL_LAN_BUFFER, |
532 |
h_add_logical_lan_buffer); |
533 |
spapr_register_hypercall(H_MULTICAST_CTRL, h_multicast_ctrl); |
534 |
type_register_static(&spapr_vlan_info); |
535 |
} |
536 |
|
537 |
type_init(spapr_vlan_register_types) |