mirror of https://github.com/proxmox/mirror_qemu
524 lines
16 KiB
C
524 lines
16 KiB
C
/*
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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/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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#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);
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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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}
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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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}
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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 = (VIOsPAPRVLANDevice *)sdev;
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vlan_bd_t filter_list_bd;
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if (!dev) {
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return H_PARAMETER;
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}
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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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}
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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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}
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filter_list_bd = VLAN_VALID_BD(filter_list, SPAPR_TCE_PAGE_SIZE);
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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);
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return H_PARAMETER;
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}
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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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}
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dev->buf_list = buf_list;
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sdev->signal_state = 0;
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rec_queue &= ~VLAN_BD_TOGGLE;
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/* Initialize the buffer list */
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vio_stq(sdev, buf_list, rec_queue);
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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);
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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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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));
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dev->isopen = 1;
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return H_SUCCESS;
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}
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static target_ulong h_free_logical_lan(PowerPCCPU *cpu, sPAPREnvironment *spapr,
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target_ulong opcode, target_ulong *args)
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{
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target_ulong reg = args[0];
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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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if (!dev) {
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return H_PARAMETER;
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}
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if (!dev->isopen) {
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hcall_dprintf("H_FREE_LOGICAL_LAN called without "
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"H_REGISTER_LOGICAL_LAN\n");
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return H_RESOURCE;
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}
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spapr_vlan_reset(sdev);
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return H_SUCCESS;
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}
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static target_ulong h_add_logical_lan_buffer(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 = args[1];
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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 bd;
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dprintf("H_ADD_LOGICAL_LAN_BUFFER(0x" TARGET_FMT_lx
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", 0x" TARGET_FMT_lx ")\n", reg, buf);
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if (!sdev) {
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hcall_dprintf("Bad device\n");
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return H_PARAMETER;
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}
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if ((check_bd(dev, buf, 4) < 0)
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|| (VLAN_BD_LEN(buf) < 16)) {
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hcall_dprintf("Bad buffer enqueued\n");
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return H_PARAMETER;
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}
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if (!dev->isopen || dev->rx_bufs >= VLAN_MAX_BUFS) {
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return H_RESOURCE;
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}
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do {
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dev->add_buf_ptr += 8;
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if (dev->add_buf_ptr >= SPAPR_TCE_PAGE_SIZE) {
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dev->add_buf_ptr = VLAN_RX_BDS_OFF;
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}
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bd = vio_ldq(sdev, dev->buf_list + dev->add_buf_ptr);
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} while (bd & VLAN_BD_VALID);
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vio_stq(sdev, dev->buf_list + dev->add_buf_ptr, buf);
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dev->rx_bufs++;
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dprintf("h_add_logical_lan_buffer(): Added buf ptr=%d rx_bufs=%d"
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" bd=0x%016llx\n", dev->add_buf_ptr, dev->rx_bufs,
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(unsigned long long)buf);
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return H_SUCCESS;
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}
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static target_ulong h_send_logical_lan(PowerPCCPU *cpu, sPAPREnvironment *spapr,
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target_ulong opcode, target_ulong *args)
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{
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target_ulong reg = args[0];
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target_ulong *bufs = args + 1;
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target_ulong continue_token = args[7];
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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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unsigned total_len;
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uint8_t *lbuf, *p;
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int i, nbufs;
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int ret;
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dprintf("H_SEND_LOGICAL_LAN(0x" TARGET_FMT_lx ", <bufs>, 0x"
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TARGET_FMT_lx ")\n", reg, continue_token);
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if (!sdev) {
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return H_PARAMETER;
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}
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dprintf("rxbufs = %d\n", dev->rx_bufs);
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if (!dev->isopen) {
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return H_DROPPED;
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}
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if (continue_token) {
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return H_HARDWARE; /* FIXME actually handle this */
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}
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total_len = 0;
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for (i = 0; i < 6; i++) {
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dprintf(" buf desc: 0x" TARGET_FMT_lx "\n", bufs[i]);
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if (!(bufs[i] & VLAN_BD_VALID)) {
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break;
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}
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total_len += VLAN_BD_LEN(bufs[i]);
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}
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nbufs = i;
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dprintf("h_send_logical_lan() %d buffers, total length 0x%x\n",
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nbufs, total_len);
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if (total_len == 0) {
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return H_SUCCESS;
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}
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if (total_len > MAX_PACKET_SIZE) {
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/* Don't let the guest force too large an allocation */
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return H_RESOURCE;
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}
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lbuf = alloca(total_len);
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p = lbuf;
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for (i = 0; i < nbufs; i++) {
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ret = spapr_vio_dma_read(sdev, VLAN_BD_ADDR(bufs[i]),
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p, VLAN_BD_LEN(bufs[i]));
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
p += VLAN_BD_LEN(bufs[i]);
|
|
}
|
|
|
|
qemu_send_packet(&dev->nic->nc, lbuf, total_len);
|
|
|
|
return H_SUCCESS;
|
|
}
|
|
|
|
static target_ulong h_multicast_ctrl(PowerPCCPU *cpu, sPAPREnvironment *spapr,
|
|
target_ulong opcode, target_ulong *args)
|
|
{
|
|
target_ulong reg = args[0];
|
|
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
|
|
|
|
if (!dev) {
|
|
return H_PARAMETER;
|
|
}
|
|
|
|
return H_SUCCESS;
|
|
}
|
|
|
|
static Property spapr_vlan_properties[] = {
|
|
DEFINE_SPAPR_PROPERTIES(VIOsPAPRVLANDevice, sdev),
|
|
DEFINE_NIC_PROPERTIES(VIOsPAPRVLANDevice, nicconf),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void spapr_vlan_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
VIOsPAPRDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass);
|
|
|
|
k->init = spapr_vlan_init;
|
|
k->reset = spapr_vlan_reset;
|
|
k->devnode = spapr_vlan_devnode;
|
|
k->dt_name = "l-lan";
|
|
k->dt_type = "network";
|
|
k->dt_compatible = "IBM,l-lan";
|
|
k->signal_mask = 0x1;
|
|
dc->props = spapr_vlan_properties;
|
|
k->rtce_window_size = 0x10000000;
|
|
}
|
|
|
|
static const TypeInfo spapr_vlan_info = {
|
|
.name = "spapr-vlan",
|
|
.parent = TYPE_VIO_SPAPR_DEVICE,
|
|
.instance_size = sizeof(VIOsPAPRVLANDevice),
|
|
.class_init = spapr_vlan_class_init,
|
|
};
|
|
|
|
static void spapr_vlan_register_types(void)
|
|
{
|
|
spapr_register_hypercall(H_REGISTER_LOGICAL_LAN, h_register_logical_lan);
|
|
spapr_register_hypercall(H_FREE_LOGICAL_LAN, h_free_logical_lan);
|
|
spapr_register_hypercall(H_SEND_LOGICAL_LAN, h_send_logical_lan);
|
|
spapr_register_hypercall(H_ADD_LOGICAL_LAN_BUFFER,
|
|
h_add_logical_lan_buffer);
|
|
spapr_register_hypercall(H_MULTICAST_CTRL, h_multicast_ctrl);
|
|
type_register_static(&spapr_vlan_info);
|
|
}
|
|
|
|
type_init(spapr_vlan_register_types)
|