861 lines
26 KiB
C
861 lines
26 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 "qemu/osdep.h"
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#include "qemu-common.h"
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#include "cpu.h"
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#include "hw/hw.h"
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#include "qemu/log.h"
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#include "net/net.h"
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#include "hw/qdev.h"
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#include "hw/ppc/spapr.h"
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#include "hw/ppc/spapr_vio.h"
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#include "sysemu/sysemu.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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/* Compatibility flags for migration */
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#define SPAPRVLAN_FLAG_RX_BUF_POOLS_BIT 0
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#define SPAPRVLAN_FLAG_RX_BUF_POOLS (1 << SPAPRVLAN_FLAG_RX_BUF_POOLS_BIT)
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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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/*
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* The final 8 bytes of the buffer list is a counter of frames dropped
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* because there was not a buffer in the buffer list capable of holding
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* the frame. We must avoid it, or the operating system will report garbage
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* for this statistic.
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*/
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#define VLAN_RX_BDS_LEN (SPAPR_TCE_PAGE_SIZE - VLAN_RX_BDS_OFF - 8)
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#define VLAN_MAX_BUFS (VLAN_RX_BDS_LEN / 8)
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#define TYPE_VIO_SPAPR_VLAN_DEVICE "spapr-vlan"
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#define VIO_SPAPR_VLAN_DEVICE(obj) \
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OBJECT_CHECK(VIOsPAPRVLANDevice, (obj), TYPE_VIO_SPAPR_VLAN_DEVICE)
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#define RX_POOL_MAX_BDS 4096
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#define RX_MAX_POOLS 5
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typedef struct {
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int32_t bufsize;
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int32_t count;
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vlan_bd_t bds[RX_POOL_MAX_BDS];
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} RxBufPool;
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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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bool isopen;
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hwaddr buf_list;
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uint32_t add_buf_ptr, use_buf_ptr, rx_bufs;
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hwaddr rxq_ptr;
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QEMUTimer *rxp_timer;
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uint32_t compat_flags; /* Compatability flags for migration */
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RxBufPool *rx_pool[RX_MAX_POOLS]; /* Receive buffer descriptor pools */
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} VIOsPAPRVLANDevice;
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static int spapr_vlan_can_receive(NetClientState *nc)
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{
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VIOsPAPRVLANDevice *dev = qemu_get_nic_opaque(nc);
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return (dev->isopen && dev->rx_bufs > 0);
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}
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/**
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* The last 8 bytes of the receive buffer list page (that has been
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* supplied by the guest with the H_REGISTER_LOGICAL_LAN call) contain
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* a counter for frames that have been dropped because there was no
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* suitable receive buffer available. This function is used to increase
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* this counter by one.
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*/
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static void spapr_vlan_record_dropped_rx_frame(VIOsPAPRVLANDevice *dev)
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{
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uint64_t cnt;
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cnt = vio_ldq(&dev->sdev, dev->buf_list + 4096 - 8);
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vio_stq(&dev->sdev, dev->buf_list + 4096 - 8, cnt + 1);
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}
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/**
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* Get buffer descriptor from one of our receive buffer pools
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*/
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static vlan_bd_t spapr_vlan_get_rx_bd_from_pool(VIOsPAPRVLANDevice *dev,
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size_t size)
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{
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vlan_bd_t bd;
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int pool;
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for (pool = 0; pool < RX_MAX_POOLS; pool++) {
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if (dev->rx_pool[pool]->count > 0 &&
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dev->rx_pool[pool]->bufsize >= size + 8) {
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break;
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}
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}
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if (pool == RX_MAX_POOLS) {
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/* Failed to find a suitable buffer */
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return 0;
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}
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DPRINTF("Found buffer: pool=%d count=%d rxbufs=%d\n", pool,
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dev->rx_pool[pool]->count, dev->rx_bufs);
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/* Remove the buffer from the pool */
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dev->rx_pool[pool]->count--;
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bd = dev->rx_pool[pool]->bds[dev->rx_pool[pool]->count];
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dev->rx_pool[pool]->bds[dev->rx_pool[pool]->count] = 0;
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return bd;
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}
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/**
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* Get buffer descriptor from the receive buffer list page that has been
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* supplied by the guest with the H_REGISTER_LOGICAL_LAN call
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*/
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static vlan_bd_t spapr_vlan_get_rx_bd_from_page(VIOsPAPRVLANDevice *dev,
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size_t size)
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{
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int buf_ptr = dev->use_buf_ptr;
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vlan_bd_t bd;
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do {
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buf_ptr += 8;
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if (buf_ptr >= VLAN_RX_BDS_LEN + VLAN_RX_BDS_OFF) {
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buf_ptr = VLAN_RX_BDS_OFF;
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}
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bd = vio_ldq(&dev->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 0;
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}
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/* Remove the buffer from the pool */
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dev->use_buf_ptr = buf_ptr;
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vio_stq(&dev->sdev, dev->buf_list + dev->use_buf_ptr, 0);
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DPRINTF("Found buffer: ptr=%d rxbufs=%d\n", dev->use_buf_ptr, dev->rx_bufs);
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return bd;
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}
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static ssize_t spapr_vlan_receive(NetClientState *nc, const uint8_t *buf,
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size_t size)
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{
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VIOsPAPRVLANDevice *dev = qemu_get_nic_opaque(nc);
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VIOsPAPRDevice *sdev = VIO_SPAPR_DEVICE(dev);
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vlan_bd_t rxq_bd = vio_ldq(sdev, dev->buf_list + VLAN_RXQ_BD_OFF);
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vlan_bd_t bd;
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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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spapr_vlan_record_dropped_rx_frame(dev);
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return 0;
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}
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if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) {
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bd = spapr_vlan_get_rx_bd_from_pool(dev, size);
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} else {
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bd = spapr_vlan_get_rx_bd_from_page(dev, size);
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}
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if (!bd) {
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spapr_vlan_record_dropped_rx_frame(dev);
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return 0;
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}
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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_DRIVER_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_flush_rx_queue(void *opaque)
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{
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VIOsPAPRVLANDevice *dev = opaque;
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qemu_flush_queued_packets(qemu_get_queue(dev->nic));
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}
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static void spapr_vlan_reset_rx_pool(RxBufPool *rxp)
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{
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/*
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* Use INT_MAX as bufsize so that unused buffers are moved to the end
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* of the list during the qsort in spapr_vlan_add_rxbuf_to_pool() later.
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*/
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rxp->bufsize = INT_MAX;
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rxp->count = 0;
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memset(rxp->bds, 0, sizeof(rxp->bds));
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}
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static void spapr_vlan_reset(VIOsPAPRDevice *sdev)
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{
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VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(sdev);
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int i;
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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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if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) {
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for (i = 0; i < RX_MAX_POOLS; i++) {
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spapr_vlan_reset_rx_pool(dev->rx_pool[i]);
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}
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}
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}
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static void spapr_vlan_realize(VIOsPAPRDevice *sdev, Error **errp)
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{
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VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(sdev);
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qemu_macaddr_default_if_unset(&dev->nicconf.macaddr);
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dev->nic = qemu_new_nic(&net_spapr_vlan_info, &dev->nicconf,
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object_get_typename(OBJECT(sdev)), sdev->qdev.id, dev);
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qemu_format_nic_info_str(qemu_get_queue(dev->nic), dev->nicconf.macaddr.a);
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dev->rxp_timer = timer_new_us(QEMU_CLOCK_VIRTUAL, spapr_vlan_flush_rx_queue,
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dev);
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}
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static void spapr_vlan_instance_init(Object *obj)
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{
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VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(obj);
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int i;
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device_add_bootindex_property(obj, &dev->nicconf.bootindex,
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"bootindex", "",
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DEVICE(dev), NULL);
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if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) {
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for (i = 0; i < RX_MAX_POOLS; i++) {
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dev->rx_pool[i] = g_new(RxBufPool, 1);
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spapr_vlan_reset_rx_pool(dev->rx_pool[i]);
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}
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}
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}
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static void spapr_vlan_instance_finalize(Object *obj)
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{
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VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(obj);
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int i;
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if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) {
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for (i = 0; i < RX_MAX_POOLS; i++) {
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g_free(dev->rx_pool[i]);
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dev->rx_pool[i] = NULL;
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}
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}
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if (dev->rxp_timer) {
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timer_del(dev->rxp_timer);
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timer_free(dev->rxp_timer);
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}
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}
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void spapr_vlan_create(VIOsPAPRBus *bus, NICInfo *nd)
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{
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DeviceState *dev;
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dev = qdev_create(&bus->bus, "spapr-vlan");
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qdev_set_nic_properties(dev, nd);
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qdev_init_nofail(dev);
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}
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static int spapr_vlan_devnode(VIOsPAPRDevice *dev, void *fdt, int node_off)
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{
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VIOsPAPRVLANDevice *vdev = VIO_SPAPR_VLAN_DEVICE(dev);
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uint8_t padded_mac[8] = {0, 0};
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int ret;
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/* Some old phyp versions give the mac address in an 8-byte
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* property. The kernel driver has an insane workaround for this;
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* rather than doing the obvious thing and checking the property
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* length, it checks whether the first byte has 0b10 in the low
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* bits. If a correct 6-byte property has a different first byte
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* the kernel will get the wrong mac address, overrunning its
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* buffer in the process (read only, thank goodness).
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*
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* Here we workaround the kernel workaround by always supplying an
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* 8-byte property, with the mac address in the last six bytes */
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memcpy(&padded_mac[2], &vdev->nicconf.macaddr, ETH_ALEN);
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ret = fdt_setprop(fdt, node_off, "local-mac-address",
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padded_mac, sizeof(padded_mac));
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if (ret < 0) {
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return ret;
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}
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ret = fdt_setprop_cell(fdt, node_off, "ibm,mac-address-filters", 0);
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if (ret < 0) {
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return ret;
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}
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return 0;
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}
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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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sPAPRMachineState *spapr,
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target_ulong opcode,
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target_ulong *args)
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{
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target_ulong reg = args[0];
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target_ulong buf_list = args[1];
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target_ulong rec_queue = args[2];
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target_ulong filter_list = args[3];
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VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
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VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(sdev);
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vlan_bd_t filter_list_bd;
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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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}
|
|
|
|
filter_list_bd = VLAN_VALID_BD(filter_list, SPAPR_TCE_PAGE_SIZE);
|
|
if (check_bd(dev, filter_list_bd, SPAPR_TCE_PAGE_SIZE) < 0) {
|
|
hcall_dprintf("Bad filter_list 0x" TARGET_FMT_lx "\n", filter_list);
|
|
return H_PARAMETER;
|
|
}
|
|
|
|
if (!(rec_queue & VLAN_BD_VALID)
|
|
|| (check_bd(dev, rec_queue, VLAN_RQ_ALIGNMENT) < 0)) {
|
|
hcall_dprintf("Bad receive queue\n");
|
|
return H_PARAMETER;
|
|
}
|
|
|
|
dev->buf_list = buf_list;
|
|
sdev->signal_state = 0;
|
|
|
|
rec_queue &= ~VLAN_BD_TOGGLE;
|
|
|
|
/* Initialize the buffer list */
|
|
vio_stq(sdev, buf_list, rec_queue);
|
|
vio_stq(sdev, buf_list + 8, filter_list_bd);
|
|
spapr_vio_dma_set(sdev, buf_list + VLAN_RX_BDS_OFF, 0,
|
|
SPAPR_TCE_PAGE_SIZE - VLAN_RX_BDS_OFF);
|
|
dev->add_buf_ptr = VLAN_RX_BDS_OFF - 8;
|
|
dev->use_buf_ptr = VLAN_RX_BDS_OFF - 8;
|
|
dev->rx_bufs = 0;
|
|
dev->rxq_ptr = 0;
|
|
|
|
/* Initialize the receive queue */
|
|
spapr_vio_dma_set(sdev, VLAN_BD_ADDR(rec_queue), 0, VLAN_BD_LEN(rec_queue));
|
|
|
|
dev->isopen = 1;
|
|
qemu_flush_queued_packets(qemu_get_queue(dev->nic));
|
|
|
|
return H_SUCCESS;
|
|
}
|
|
|
|
|
|
static target_ulong h_free_logical_lan(PowerPCCPU *cpu,
|
|
sPAPRMachineState *spapr,
|
|
target_ulong opcode, target_ulong *args)
|
|
{
|
|
target_ulong reg = args[0];
|
|
VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
|
|
VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(sdev);
|
|
|
|
if (!dev) {
|
|
return H_PARAMETER;
|
|
}
|
|
|
|
if (!dev->isopen) {
|
|
hcall_dprintf("H_FREE_LOGICAL_LAN called without "
|
|
"H_REGISTER_LOGICAL_LAN\n");
|
|
return H_RESOURCE;
|
|
}
|
|
|
|
spapr_vlan_reset(sdev);
|
|
return H_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* Used for qsort, this function compares two RxBufPools by size.
|
|
*/
|
|
static int rx_pool_size_compare(const void *p1, const void *p2)
|
|
{
|
|
const RxBufPool *pool1 = *(RxBufPool **)p1;
|
|
const RxBufPool *pool2 = *(RxBufPool **)p2;
|
|
|
|
if (pool1->bufsize < pool2->bufsize) {
|
|
return -1;
|
|
}
|
|
return pool1->bufsize > pool2->bufsize;
|
|
}
|
|
|
|
/**
|
|
* Search for a matching buffer pool with exact matching size,
|
|
* or return -1 if no matching pool has been found.
|
|
*/
|
|
static int spapr_vlan_get_rx_pool_id(VIOsPAPRVLANDevice *dev, int size)
|
|
{
|
|
int pool;
|
|
|
|
for (pool = 0; pool < RX_MAX_POOLS; pool++) {
|
|
if (dev->rx_pool[pool]->bufsize == size) {
|
|
return pool;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Enqueuing receive buffer by adding it to one of our receive buffer pools
|
|
*/
|
|
static target_long spapr_vlan_add_rxbuf_to_pool(VIOsPAPRVLANDevice *dev,
|
|
target_ulong buf)
|
|
{
|
|
int size = VLAN_BD_LEN(buf);
|
|
int pool;
|
|
|
|
pool = spapr_vlan_get_rx_pool_id(dev, size);
|
|
if (pool < 0) {
|
|
/*
|
|
* No matching pool found? Try to use a new one. If the guest used all
|
|
* pools before, but changed the size of one pool inbetween, we might
|
|
* need to recycle that pool here (if it's empty already). Thus scan
|
|
* all buffer pools now, starting with the last (likely empty) one.
|
|
*/
|
|
for (pool = RX_MAX_POOLS - 1; pool >= 0 ; pool--) {
|
|
if (dev->rx_pool[pool]->count == 0) {
|
|
dev->rx_pool[pool]->bufsize = size;
|
|
/*
|
|
* Sort pools by size so that spapr_vlan_receive()
|
|
* can later find the smallest buffer pool easily.
|
|
*/
|
|
qsort(dev->rx_pool, RX_MAX_POOLS, sizeof(dev->rx_pool[0]),
|
|
rx_pool_size_compare);
|
|
pool = spapr_vlan_get_rx_pool_id(dev, size);
|
|
DPRINTF("created RX pool %d for size %lld\n", pool,
|
|
VLAN_BD_LEN(buf));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
/* Still no usable pool? Give up */
|
|
if (pool < 0 || dev->rx_pool[pool]->count >= RX_POOL_MAX_BDS) {
|
|
return H_RESOURCE;
|
|
}
|
|
|
|
DPRINTF("h_add_llan_buf(): Add buf using pool %i (size %lli, count=%i)\n",
|
|
pool, VLAN_BD_LEN(buf), dev->rx_pool[pool]->count);
|
|
|
|
dev->rx_pool[pool]->bds[dev->rx_pool[pool]->count++] = buf;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* This is the old way of enqueuing receive buffers: Add it to the rx queue
|
|
* page that has been supplied by the guest (which is quite limited in size).
|
|
*/
|
|
static target_long spapr_vlan_add_rxbuf_to_page(VIOsPAPRVLANDevice *dev,
|
|
target_ulong buf)
|
|
{
|
|
vlan_bd_t bd;
|
|
|
|
if (dev->rx_bufs >= VLAN_MAX_BUFS) {
|
|
return H_RESOURCE;
|
|
}
|
|
|
|
do {
|
|
dev->add_buf_ptr += 8;
|
|
if (dev->add_buf_ptr >= VLAN_RX_BDS_LEN + VLAN_RX_BDS_OFF) {
|
|
dev->add_buf_ptr = VLAN_RX_BDS_OFF;
|
|
}
|
|
|
|
bd = vio_ldq(&dev->sdev, dev->buf_list + dev->add_buf_ptr);
|
|
} while (bd & VLAN_BD_VALID);
|
|
|
|
vio_stq(&dev->sdev, dev->buf_list + dev->add_buf_ptr, buf);
|
|
|
|
DPRINTF("h_add_llan_buf(): Added buf ptr=%d rx_bufs=%d bd=0x%016llx\n",
|
|
dev->add_buf_ptr, dev->rx_bufs, (unsigned long long)buf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static target_ulong h_add_logical_lan_buffer(PowerPCCPU *cpu,
|
|
sPAPRMachineState *spapr,
|
|
target_ulong opcode,
|
|
target_ulong *args)
|
|
{
|
|
target_ulong reg = args[0];
|
|
target_ulong buf = args[1];
|
|
VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
|
|
VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(sdev);
|
|
target_long ret;
|
|
|
|
DPRINTF("H_ADD_LOGICAL_LAN_BUFFER(0x" TARGET_FMT_lx
|
|
", 0x" TARGET_FMT_lx ")\n", reg, buf);
|
|
|
|
if (!sdev) {
|
|
hcall_dprintf("Bad device\n");
|
|
return H_PARAMETER;
|
|
}
|
|
|
|
if ((check_bd(dev, buf, 4) < 0)
|
|
|| (VLAN_BD_LEN(buf) < 16)) {
|
|
hcall_dprintf("Bad buffer enqueued\n");
|
|
return H_PARAMETER;
|
|
}
|
|
|
|
if (!dev->isopen) {
|
|
return H_RESOURCE;
|
|
}
|
|
|
|
if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) {
|
|
ret = spapr_vlan_add_rxbuf_to_pool(dev, buf);
|
|
} else {
|
|
ret = spapr_vlan_add_rxbuf_to_page(dev, buf);
|
|
}
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
|
|
dev->rx_bufs++;
|
|
|
|
/*
|
|
* Give guest some more time to add additional RX buffers before we
|
|
* flush the receive queue, so that e.g. fragmented IP packets can
|
|
* be passed to the guest in one go later (instead of passing single
|
|
* fragments if there is only one receive buffer available).
|
|
*/
|
|
timer_mod(dev->rxp_timer, qemu_clock_get_us(QEMU_CLOCK_VIRTUAL) + 500);
|
|
|
|
return H_SUCCESS;
|
|
}
|
|
|
|
static target_ulong h_send_logical_lan(PowerPCCPU *cpu,
|
|
sPAPRMachineState *spapr,
|
|
target_ulong opcode, target_ulong *args)
|
|
{
|
|
target_ulong reg = args[0];
|
|
target_ulong *bufs = args + 1;
|
|
target_ulong continue_token = args[7];
|
|
VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
|
|
VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(sdev);
|
|
unsigned total_len;
|
|
uint8_t *lbuf, *p;
|
|
int i, nbufs;
|
|
int ret;
|
|
|
|
DPRINTF("H_SEND_LOGICAL_LAN(0x" TARGET_FMT_lx ", <bufs>, 0x"
|
|
TARGET_FMT_lx ")\n", reg, continue_token);
|
|
|
|
if (!sdev) {
|
|
return H_PARAMETER;
|
|
}
|
|
|
|
DPRINTF("rxbufs = %d\n", dev->rx_bufs);
|
|
|
|
if (!dev->isopen) {
|
|
return H_DROPPED;
|
|
}
|
|
|
|
if (continue_token) {
|
|
return H_HARDWARE; /* FIXME actually handle this */
|
|
}
|
|
|
|
total_len = 0;
|
|
for (i = 0; i < 6; i++) {
|
|
DPRINTF(" buf desc: 0x" TARGET_FMT_lx "\n", bufs[i]);
|
|
if (!(bufs[i] & VLAN_BD_VALID)) {
|
|
break;
|
|
}
|
|
total_len += VLAN_BD_LEN(bufs[i]);
|
|
}
|
|
|
|
nbufs = i;
|
|
DPRINTF("h_send_logical_lan() %d buffers, total length 0x%x\n",
|
|
nbufs, total_len);
|
|
|
|
if (total_len == 0) {
|
|
return H_SUCCESS;
|
|
}
|
|
|
|
if (total_len > MAX_PACKET_SIZE) {
|
|
/* Don't let the guest force too large an allocation */
|
|
return H_RESOURCE;
|
|
}
|
|
|
|
lbuf = alloca(total_len);
|
|
p = lbuf;
|
|
for (i = 0; i < nbufs; i++) {
|
|
ret = spapr_vio_dma_read(sdev, VLAN_BD_ADDR(bufs[i]),
|
|
p, VLAN_BD_LEN(bufs[i]));
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
p += VLAN_BD_LEN(bufs[i]);
|
|
}
|
|
|
|
qemu_send_packet(qemu_get_queue(dev->nic), lbuf, total_len);
|
|
|
|
return H_SUCCESS;
|
|
}
|
|
|
|
static target_ulong h_multicast_ctrl(PowerPCCPU *cpu, sPAPRMachineState *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_BIT("use-rx-buffer-pools", VIOsPAPRVLANDevice,
|
|
compat_flags, SPAPRVLAN_FLAG_RX_BUF_POOLS_BIT, true),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static bool spapr_vlan_rx_buffer_pools_needed(void *opaque)
|
|
{
|
|
VIOsPAPRVLANDevice *dev = opaque;
|
|
|
|
return (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) != 0;
|
|
}
|
|
|
|
static const VMStateDescription vmstate_rx_buffer_pool = {
|
|
.name = "spapr_llan/rx_buffer_pool",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.needed = spapr_vlan_rx_buffer_pools_needed,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_INT32(bufsize, RxBufPool),
|
|
VMSTATE_INT32(count, RxBufPool),
|
|
VMSTATE_UINT64_ARRAY(bds, RxBufPool, RX_POOL_MAX_BDS),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static const VMStateDescription vmstate_rx_pools = {
|
|
.name = "spapr_llan/rx_pools",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.needed = spapr_vlan_rx_buffer_pools_needed,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_ARRAY_OF_POINTER_TO_STRUCT(rx_pool, VIOsPAPRVLANDevice,
|
|
RX_MAX_POOLS, 1,
|
|
vmstate_rx_buffer_pool, RxBufPool),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static const VMStateDescription vmstate_spapr_llan = {
|
|
.name = "spapr_llan",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_SPAPR_VIO(sdev, VIOsPAPRVLANDevice),
|
|
/* LLAN state */
|
|
VMSTATE_BOOL(isopen, VIOsPAPRVLANDevice),
|
|
VMSTATE_UINT64(buf_list, VIOsPAPRVLANDevice),
|
|
VMSTATE_UINT32(add_buf_ptr, VIOsPAPRVLANDevice),
|
|
VMSTATE_UINT32(use_buf_ptr, VIOsPAPRVLANDevice),
|
|
VMSTATE_UINT32(rx_bufs, VIOsPAPRVLANDevice),
|
|
VMSTATE_UINT64(rxq_ptr, VIOsPAPRVLANDevice),
|
|
|
|
VMSTATE_END_OF_LIST()
|
|
},
|
|
.subsections = (const VMStateDescription * []) {
|
|
&vmstate_rx_pools,
|
|
NULL
|
|
}
|
|
};
|
|
|
|
static void spapr_vlan_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
VIOsPAPRDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass);
|
|
|
|
k->realize = spapr_vlan_realize;
|
|
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;
|
|
set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
|
|
dc->props = spapr_vlan_properties;
|
|
k->rtce_window_size = 0x10000000;
|
|
dc->vmsd = &vmstate_spapr_llan;
|
|
}
|
|
|
|
static const TypeInfo spapr_vlan_info = {
|
|
.name = TYPE_VIO_SPAPR_VLAN_DEVICE,
|
|
.parent = TYPE_VIO_SPAPR_DEVICE,
|
|
.instance_size = sizeof(VIOsPAPRVLANDevice),
|
|
.class_init = spapr_vlan_class_init,
|
|
.instance_init = spapr_vlan_instance_init,
|
|
.instance_finalize = spapr_vlan_instance_finalize,
|
|
};
|
|
|
|
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)
|