root / hw / spapr_llan.c @ 69c38b8f
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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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#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_VIO_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(VLANClientState *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(VLANClientState *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 = ldq_tce(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_VIO_TCE_PAGE_SIZE) {
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buf_ptr = VLAN_RX_BDS_OFF; |
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} |
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bd = ldq_tce(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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stq_tce(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_tce_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 = ldq_tce(sdev, VLAN_BD_ADDR(bd)); |
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stq_tce(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr + 8, handle);
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stw_tce(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr + 4, size);
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sth_tce(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr + 2, 8); |
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stb_tce(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)ldq_tce(sdev, VLAN_BD_ADDR(rxq_bd) + |
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dev->rxq_ptr), |
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(unsigned long long)ldq_tce(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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stq_tce(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(sdev->qirq); |
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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_TYPE_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 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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sdev->qdev.info->name, 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, uint32_t reg, NICInfo *nd,
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qemu_irq qirq, uint32_t vio_irq_num) |
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{ |
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DeviceState *dev; |
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VIOsPAPRDevice *sdev; |
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dev = qdev_create(&bus->bus, "spapr-vlan");
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qdev_prop_set_uint32(dev, "reg", reg);
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qdev_set_nic_properties(dev, nd); |
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qdev_init_nofail(dev); |
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sdev = (VIOsPAPRDevice *)dev; |
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sdev->qirq = qirq; |
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sdev->vio_irq_num = vio_irq_num; |
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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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|
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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; |
252 |
} |
253 |
|
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if (spapr_vio_check_tces(&dev->sdev, VLAN_BD_ADDR(bd),
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VLAN_BD_LEN(bd), SPAPR_TCE_RW) != 0) {
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return -1; |
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} |
258 |
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return 0; |
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} |
261 |
|
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static target_ulong h_register_logical_lan(CPUState *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; |
274 |
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if (!dev) {
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return H_PARAMETER;
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} |
278 |
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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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} |
284 |
|
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if (check_bd(dev, VLAN_VALID_BD(buf_list, SPAPR_VIO_TCE_PAGE_SIZE),
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SPAPR_VIO_TCE_PAGE_SIZE) < 0) {
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hcall_dprintf("Bad buf_list 0x" TARGET_FMT_lx " for " |
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"H_REGISTER_LOGICAL_LAN\n", buf_list);
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return H_PARAMETER;
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} |
291 |
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filter_list_bd = VLAN_VALID_BD(filter_list, SPAPR_VIO_TCE_PAGE_SIZE); |
293 |
if (check_bd(dev, filter_list_bd, SPAPR_VIO_TCE_PAGE_SIZE) < 0) { |
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hcall_dprintf("Bad filter_list 0x" TARGET_FMT_lx " for " |
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"H_REGISTER_LOGICAL_LAN\n", filter_list);
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return H_PARAMETER;
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} |
298 |
|
299 |
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 for H_REGISTER_LOGICAL_LAN\n");
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return H_PARAMETER;
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} |
304 |
|
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dev->buf_list = buf_list; |
306 |
sdev->signal_state = 0;
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307 |
|
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rec_queue &= ~VLAN_BD_TOGGLE; |
309 |
|
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/* Initialize the buffer list */
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stq_tce(sdev, buf_list, rec_queue); |
312 |
stq_tce(sdev, buf_list + 8, filter_list_bd);
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spapr_tce_dma_zero(sdev, buf_list + VLAN_RX_BDS_OFF, |
314 |
SPAPR_VIO_TCE_PAGE_SIZE - VLAN_RX_BDS_OFF); |
315 |
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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318 |
dev->rxq_ptr = 0;
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319 |
|
320 |
/* Initialize the receive queue */
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spapr_tce_dma_zero(sdev, VLAN_BD_ADDR(rec_queue), VLAN_BD_LEN(rec_queue)); |
322 |
|
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dev->isopen = 1;
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return H_SUCCESS;
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325 |
} |
326 |
|
327 |
|
328 |
static target_ulong h_free_logical_lan(CPUState *env, sPAPREnvironment *spapr,
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target_ulong opcode, target_ulong *args) |
330 |
{ |
331 |
target_ulong reg = args[0];
|
332 |
VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
333 |
VIOsPAPRVLANDevice *dev = (VIOsPAPRVLANDevice *)sdev; |
334 |
|
335 |
if (!dev) {
|
336 |
return H_PARAMETER;
|
337 |
} |
338 |
|
339 |
if (!dev->isopen) {
|
340 |
hcall_dprintf("H_FREE_LOGICAL_LAN called without "
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"H_REGISTER_LOGICAL_LAN\n");
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342 |
return H_RESOURCE;
|
343 |
} |
344 |
|
345 |
dev->buf_list = 0;
|
346 |
dev->rx_bufs = 0;
|
347 |
dev->isopen = 0;
|
348 |
return H_SUCCESS;
|
349 |
} |
350 |
|
351 |
static target_ulong h_add_logical_lan_buffer(CPUState *env,
|
352 |
sPAPREnvironment *spapr, |
353 |
target_ulong opcode, |
354 |
target_ulong *args) |
355 |
{ |
356 |
target_ulong reg = args[0];
|
357 |
target_ulong buf = args[1];
|
358 |
VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
359 |
VIOsPAPRVLANDevice *dev = (VIOsPAPRVLANDevice *)sdev; |
360 |
vlan_bd_t bd; |
361 |
|
362 |
dprintf("H_ADD_LOGICAL_LAN_BUFFER(0x" TARGET_FMT_lx
|
363 |
", 0x" TARGET_FMT_lx ")\n", reg, buf); |
364 |
|
365 |
if (!sdev) {
|
366 |
hcall_dprintf("Wrong device in h_add_logical_lan_buffer\n");
|
367 |
return H_PARAMETER;
|
368 |
} |
369 |
|
370 |
if ((check_bd(dev, buf, 4) < 0) |
371 |
|| (VLAN_BD_LEN(buf) < 16)) {
|
372 |
hcall_dprintf("Bad buffer enqueued in h_add_logical_lan_buffer\n");
|
373 |
return H_PARAMETER;
|
374 |
} |
375 |
|
376 |
if (!dev->isopen || dev->rx_bufs >= VLAN_MAX_BUFS) {
|
377 |
return H_RESOURCE;
|
378 |
} |
379 |
|
380 |
do {
|
381 |
dev->add_buf_ptr += 8;
|
382 |
if (dev->add_buf_ptr >= SPAPR_VIO_TCE_PAGE_SIZE) {
|
383 |
dev->add_buf_ptr = VLAN_RX_BDS_OFF; |
384 |
} |
385 |
|
386 |
bd = ldq_tce(sdev, dev->buf_list + dev->add_buf_ptr); |
387 |
} while (bd & VLAN_BD_VALID);
|
388 |
|
389 |
stq_tce(sdev, dev->buf_list + dev->add_buf_ptr, buf); |
390 |
|
391 |
dev->rx_bufs++; |
392 |
|
393 |
dprintf("h_add_logical_lan_buffer(): Added buf ptr=%d rx_bufs=%d"
|
394 |
" bd=0x%016llx\n", dev->add_buf_ptr, dev->rx_bufs,
|
395 |
(unsigned long long)buf); |
396 |
|
397 |
return H_SUCCESS;
|
398 |
} |
399 |
|
400 |
static target_ulong h_send_logical_lan(CPUState *env, sPAPREnvironment *spapr,
|
401 |
target_ulong opcode, target_ulong *args) |
402 |
{ |
403 |
target_ulong reg = args[0];
|
404 |
target_ulong *bufs = args + 1;
|
405 |
target_ulong continue_token = args[7];
|
406 |
VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
407 |
VIOsPAPRVLANDevice *dev = (VIOsPAPRVLANDevice *)sdev; |
408 |
unsigned total_len;
|
409 |
uint8_t *lbuf, *p; |
410 |
int i, nbufs;
|
411 |
int ret;
|
412 |
|
413 |
dprintf("H_SEND_LOGICAL_LAN(0x" TARGET_FMT_lx ", <bufs>, 0x" |
414 |
TARGET_FMT_lx ")\n", reg, continue_token);
|
415 |
|
416 |
if (!sdev) {
|
417 |
return H_PARAMETER;
|
418 |
} |
419 |
|
420 |
dprintf("rxbufs = %d\n", dev->rx_bufs);
|
421 |
|
422 |
if (!dev->isopen) {
|
423 |
return H_DROPPED;
|
424 |
} |
425 |
|
426 |
if (continue_token) {
|
427 |
return H_HARDWARE; /* FIXME actually handle this */ |
428 |
} |
429 |
|
430 |
total_len = 0;
|
431 |
for (i = 0; i < 6; i++) { |
432 |
dprintf(" buf desc: 0x" TARGET_FMT_lx "\n", bufs[i]); |
433 |
if (!(bufs[i] & VLAN_BD_VALID)) {
|
434 |
break;
|
435 |
} |
436 |
total_len += VLAN_BD_LEN(bufs[i]); |
437 |
} |
438 |
|
439 |
nbufs = i; |
440 |
dprintf("h_send_logical_lan() %d buffers, total length 0x%x\n",
|
441 |
nbufs, total_len); |
442 |
|
443 |
if (total_len == 0) { |
444 |
return H_SUCCESS;
|
445 |
} |
446 |
|
447 |
if (total_len > MAX_PACKET_SIZE) {
|
448 |
/* Don't let the guest force too large an allocation */
|
449 |
return H_RESOURCE;
|
450 |
} |
451 |
|
452 |
lbuf = alloca(total_len); |
453 |
p = lbuf; |
454 |
for (i = 0; i < nbufs; i++) { |
455 |
ret = spapr_tce_dma_read(sdev, VLAN_BD_ADDR(bufs[i]), |
456 |
p, VLAN_BD_LEN(bufs[i])); |
457 |
if (ret < 0) { |
458 |
return ret;
|
459 |
} |
460 |
|
461 |
p += VLAN_BD_LEN(bufs[i]); |
462 |
} |
463 |
|
464 |
qemu_send_packet(&dev->nic->nc, lbuf, total_len); |
465 |
|
466 |
return H_SUCCESS;
|
467 |
} |
468 |
|
469 |
static target_ulong h_multicast_ctrl(CPUState *env, sPAPREnvironment *spapr,
|
470 |
target_ulong opcode, target_ulong *args) |
471 |
{ |
472 |
target_ulong reg = args[0];
|
473 |
VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
474 |
|
475 |
if (!dev) {
|
476 |
return H_PARAMETER;
|
477 |
} |
478 |
|
479 |
return H_SUCCESS;
|
480 |
} |
481 |
|
482 |
static void vlan_hcalls(VIOsPAPRBus *bus) |
483 |
{ |
484 |
spapr_register_hypercall(H_REGISTER_LOGICAL_LAN, h_register_logical_lan); |
485 |
spapr_register_hypercall(H_FREE_LOGICAL_LAN, h_free_logical_lan); |
486 |
spapr_register_hypercall(H_SEND_LOGICAL_LAN, h_send_logical_lan); |
487 |
spapr_register_hypercall(H_ADD_LOGICAL_LAN_BUFFER, |
488 |
h_add_logical_lan_buffer); |
489 |
spapr_register_hypercall(H_MULTICAST_CTRL, h_multicast_ctrl); |
490 |
} |
491 |
|
492 |
static VIOsPAPRDeviceInfo spapr_vlan = {
|
493 |
.init = spapr_vlan_init, |
494 |
.devnode = spapr_vlan_devnode, |
495 |
.dt_name = "l-lan",
|
496 |
.dt_type = "network",
|
497 |
.dt_compatible = "IBM,l-lan",
|
498 |
.signal_mask = 0x1,
|
499 |
.hcalls = vlan_hcalls, |
500 |
.qdev.name = "spapr-vlan",
|
501 |
.qdev.size = sizeof(VIOsPAPRVLANDevice),
|
502 |
.qdev.props = (Property[]) { |
503 |
DEFINE_PROP_UINT32("reg", VIOsPAPRDevice, reg, 0x1000), |
504 |
DEFINE_PROP_UINT32("dma-window", VIOsPAPRDevice, rtce_window_size,
|
505 |
0x10000000),
|
506 |
DEFINE_NIC_PROPERTIES(VIOsPAPRVLANDevice, nicconf), |
507 |
DEFINE_PROP_END_OF_LIST(), |
508 |
}, |
509 |
}; |
510 |
|
511 |
static void spapr_vlan_register(void) |
512 |
{ |
513 |
spapr_vio_bus_register_withprop(&spapr_vlan); |
514 |
} |
515 |
device_init(spapr_vlan_register); |