root / hw / spapr_llan.c @ fa2ddcb4
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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.h" |
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#include "net.h" |
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#include "hw/qdev.h" |
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#include "hw/spapr.h" |
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#include "hw/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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|
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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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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 = DO_UPCAST(NICState, nc, nc)->opaque; |
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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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VIOsPAPRDevice *sdev = DO_UPCAST(NICState, nc, nc)->opaque; |
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VIOsPAPRVLANDevice *dev = (VIOsPAPRVLANDevice *)sdev; |
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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 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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}; |
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static void spapr_vlan_reset(VIOsPAPRDevice *sdev) |
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{ |
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VIOsPAPRVLANDevice *dev = DO_UPCAST(VIOsPAPRVLANDevice, sdev, 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 = (VIOsPAPRVLANDevice *)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(&dev->nic->nc, 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 = (VIOsPAPRVLANDevice *)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); |
242 |
if (ret < 0) { |
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return ret;
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} |
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return 0; |
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} |
248 |
|
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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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} |
256 |
|
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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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} |
263 |
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return 0; |
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} |
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|
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static target_ulong h_register_logical_lan(CPUPPCState *env,
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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 = (VIOsPAPRVLANDevice *)sdev; |
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vlan_bd_t filter_list_bd; |
279 |
|
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if (!dev) {
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return H_PARAMETER;
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} |
283 |
|
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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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} |
289 |
|
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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); |
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return H_PARAMETER;
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} |
295 |
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filter_list_bd = VLAN_VALID_BD(filter_list, SPAPR_TCE_PAGE_SIZE); |
297 |
if (check_bd(dev, filter_list_bd, SPAPR_TCE_PAGE_SIZE) < 0) { |
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hcall_dprintf("Bad filter_list 0x" TARGET_FMT_lx "\n", filter_list); |
299 |
return H_PARAMETER;
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} |
301 |
|
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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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} |
307 |
|
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dev->buf_list = buf_list; |
309 |
sdev->signal_state = 0;
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310 |
|
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rec_queue &= ~VLAN_BD_TOGGLE; |
312 |
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/* Initialize the buffer list */
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vio_stq(sdev, buf_list, rec_queue); |
315 |
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); |
318 |
dev->add_buf_ptr = VLAN_RX_BDS_OFF - 8;
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319 |
dev->use_buf_ptr = VLAN_RX_BDS_OFF - 8;
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320 |
dev->rx_bufs = 0;
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dev->rxq_ptr = 0;
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/* Initialize the receive queue */
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spapr_vio_dma_set(sdev, VLAN_BD_ADDR(rec_queue), 0, VLAN_BD_LEN(rec_queue));
|
325 |
|
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dev->isopen = 1;
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return H_SUCCESS;
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328 |
} |
329 |
|
330 |
|
331 |
static target_ulong h_free_logical_lan(CPUPPCState *env, sPAPREnvironment *spapr,
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target_ulong opcode, target_ulong *args) |
333 |
{ |
334 |
target_ulong reg = args[0];
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335 |
VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
336 |
VIOsPAPRVLANDevice *dev = (VIOsPAPRVLANDevice *)sdev; |
337 |
|
338 |
if (!dev) {
|
339 |
return H_PARAMETER;
|
340 |
} |
341 |
|
342 |
if (!dev->isopen) {
|
343 |
hcall_dprintf("H_FREE_LOGICAL_LAN called without "
|
344 |
"H_REGISTER_LOGICAL_LAN\n");
|
345 |
return H_RESOURCE;
|
346 |
} |
347 |
|
348 |
spapr_vlan_reset(sdev); |
349 |
return H_SUCCESS;
|
350 |
} |
351 |
|
352 |
static target_ulong h_add_logical_lan_buffer(CPUPPCState *env,
|
353 |
sPAPREnvironment *spapr, |
354 |
target_ulong opcode, |
355 |
target_ulong *args) |
356 |
{ |
357 |
target_ulong reg = args[0];
|
358 |
target_ulong buf = args[1];
|
359 |
VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
360 |
VIOsPAPRVLANDevice *dev = (VIOsPAPRVLANDevice *)sdev; |
361 |
vlan_bd_t bd; |
362 |
|
363 |
dprintf("H_ADD_LOGICAL_LAN_BUFFER(0x" TARGET_FMT_lx
|
364 |
", 0x" TARGET_FMT_lx ")\n", reg, buf); |
365 |
|
366 |
if (!sdev) {
|
367 |
hcall_dprintf("Bad device\n");
|
368 |
return H_PARAMETER;
|
369 |
} |
370 |
|
371 |
if ((check_bd(dev, buf, 4) < 0) |
372 |
|| (VLAN_BD_LEN(buf) < 16)) {
|
373 |
hcall_dprintf("Bad buffer enqueued\n");
|
374 |
return H_PARAMETER;
|
375 |
} |
376 |
|
377 |
if (!dev->isopen || dev->rx_bufs >= VLAN_MAX_BUFS) {
|
378 |
return H_RESOURCE;
|
379 |
} |
380 |
|
381 |
do {
|
382 |
dev->add_buf_ptr += 8;
|
383 |
if (dev->add_buf_ptr >= SPAPR_TCE_PAGE_SIZE) {
|
384 |
dev->add_buf_ptr = VLAN_RX_BDS_OFF; |
385 |
} |
386 |
|
387 |
bd = vio_ldq(sdev, dev->buf_list + dev->add_buf_ptr); |
388 |
} while (bd & VLAN_BD_VALID);
|
389 |
|
390 |
vio_stq(sdev, dev->buf_list + dev->add_buf_ptr, buf); |
391 |
|
392 |
dev->rx_bufs++; |
393 |
|
394 |
dprintf("h_add_logical_lan_buffer(): Added buf ptr=%d rx_bufs=%d"
|
395 |
" bd=0x%016llx\n", dev->add_buf_ptr, dev->rx_bufs,
|
396 |
(unsigned long long)buf); |
397 |
|
398 |
return H_SUCCESS;
|
399 |
} |
400 |
|
401 |
static target_ulong h_send_logical_lan(CPUPPCState *env, sPAPREnvironment *spapr,
|
402 |
target_ulong opcode, target_ulong *args) |
403 |
{ |
404 |
target_ulong reg = args[0];
|
405 |
target_ulong *bufs = args + 1;
|
406 |
target_ulong continue_token = args[7];
|
407 |
VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
408 |
VIOsPAPRVLANDevice *dev = (VIOsPAPRVLANDevice *)sdev; |
409 |
unsigned total_len;
|
410 |
uint8_t *lbuf, *p; |
411 |
int i, nbufs;
|
412 |
int ret;
|
413 |
|
414 |
dprintf("H_SEND_LOGICAL_LAN(0x" TARGET_FMT_lx ", <bufs>, 0x" |
415 |
TARGET_FMT_lx ")\n", reg, continue_token);
|
416 |
|
417 |
if (!sdev) {
|
418 |
return H_PARAMETER;
|
419 |
} |
420 |
|
421 |
dprintf("rxbufs = %d\n", dev->rx_bufs);
|
422 |
|
423 |
if (!dev->isopen) {
|
424 |
return H_DROPPED;
|
425 |
} |
426 |
|
427 |
if (continue_token) {
|
428 |
return H_HARDWARE; /* FIXME actually handle this */ |
429 |
} |
430 |
|
431 |
total_len = 0;
|
432 |
for (i = 0; i < 6; i++) { |
433 |
dprintf(" buf desc: 0x" TARGET_FMT_lx "\n", bufs[i]); |
434 |
if (!(bufs[i] & VLAN_BD_VALID)) {
|
435 |
break;
|
436 |
} |
437 |
total_len += VLAN_BD_LEN(bufs[i]); |
438 |
} |
439 |
|
440 |
nbufs = i; |
441 |
dprintf("h_send_logical_lan() %d buffers, total length 0x%x\n",
|
442 |
nbufs, total_len); |
443 |
|
444 |
if (total_len == 0) { |
445 |
return H_SUCCESS;
|
446 |
} |
447 |
|
448 |
if (total_len > MAX_PACKET_SIZE) {
|
449 |
/* Don't let the guest force too large an allocation */
|
450 |
return H_RESOURCE;
|
451 |
} |
452 |
|
453 |
lbuf = alloca(total_len); |
454 |
p = lbuf; |
455 |
for (i = 0; i < nbufs; i++) { |
456 |
ret = spapr_vio_dma_read(sdev, VLAN_BD_ADDR(bufs[i]), |
457 |
p, VLAN_BD_LEN(bufs[i])); |
458 |
if (ret < 0) { |
459 |
return ret;
|
460 |
} |
461 |
|
462 |
p += VLAN_BD_LEN(bufs[i]); |
463 |
} |
464 |
|
465 |
qemu_send_packet(&dev->nic->nc, lbuf, total_len); |
466 |
|
467 |
return H_SUCCESS;
|
468 |
} |
469 |
|
470 |
static target_ulong h_multicast_ctrl(CPUPPCState *env, sPAPREnvironment *spapr,
|
471 |
target_ulong opcode, target_ulong *args) |
472 |
{ |
473 |
target_ulong reg = args[0];
|
474 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
475 |
|
476 |
if (!dev) {
|
477 |
return H_PARAMETER;
|
478 |
} |
479 |
|
480 |
return H_SUCCESS;
|
481 |
} |
482 |
|
483 |
static Property spapr_vlan_properties[] = {
|
484 |
DEFINE_SPAPR_PROPERTIES(VIOsPAPRVLANDevice, sdev), |
485 |
DEFINE_NIC_PROPERTIES(VIOsPAPRVLANDevice, nicconf), |
486 |
DEFINE_PROP_END_OF_LIST(), |
487 |
}; |
488 |
|
489 |
static void spapr_vlan_class_init(ObjectClass *klass, void *data) |
490 |
{ |
491 |
DeviceClass *dc = DEVICE_CLASS(klass); |
492 |
VIOsPAPRDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass); |
493 |
|
494 |
k->init = spapr_vlan_init; |
495 |
k->reset = spapr_vlan_reset; |
496 |
k->devnode = spapr_vlan_devnode; |
497 |
k->dt_name = "l-lan";
|
498 |
k->dt_type = "network";
|
499 |
k->dt_compatible = "IBM,l-lan";
|
500 |
k->signal_mask = 0x1;
|
501 |
dc->props = spapr_vlan_properties; |
502 |
k->rtce_window_size = 0x10000000;
|
503 |
} |
504 |
|
505 |
static TypeInfo spapr_vlan_info = {
|
506 |
.name = "spapr-vlan",
|
507 |
.parent = TYPE_VIO_SPAPR_DEVICE, |
508 |
.instance_size = sizeof(VIOsPAPRVLANDevice),
|
509 |
.class_init = spapr_vlan_class_init, |
510 |
}; |
511 |
|
512 |
static void spapr_vlan_register_types(void) |
513 |
{ |
514 |
spapr_register_hypercall(H_REGISTER_LOGICAL_LAN, h_register_logical_lan); |
515 |
spapr_register_hypercall(H_FREE_LOGICAL_LAN, h_free_logical_lan); |
516 |
spapr_register_hypercall(H_SEND_LOGICAL_LAN, h_send_logical_lan); |
517 |
spapr_register_hypercall(H_ADD_LOGICAL_LAN_BUFFER, |
518 |
h_add_logical_lan_buffer); |
519 |
spapr_register_hypercall(H_MULTICAST_CTRL, h_multicast_ctrl); |
520 |
type_register_static(&spapr_vlan_info); |
521 |
} |
522 |
|
523 |
type_init(spapr_vlan_register_types) |