Implement sPAPR Virtual LAN (ibmveth)
This patch implements the PAPR specified Inter Virtual Machine Logical LAN; that is the virtual hardware used by the Linux ibmveth driver. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
David Gibson
Alexander Graf
parent
ee86dfeebb
commit
8d90ad9005
@ -234,7 +234,7 @@ obj-ppc-y += ppc_newworld.o
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# IBM pSeries (sPAPR)
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ifeq ($(CONFIG_FDT)$(TARGET_PPC64),yy)
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obj-ppc-y += spapr.o spapr_hcall.o spapr_rtas.o spapr_vio.o
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obj-ppc-y += xics.o spapr_vty.o
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obj-ppc-y += xics.o spapr_vty.o spapr_llan.o
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endif
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# PowerPC 4xx boards
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obj-ppc-y += ppc4xx_devs.o ppc4xx_pci.o ppc405_uc.o ppc405_boards.o
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19
hw/spapr.c
19
hw/spapr.c
@ -27,6 +27,7 @@
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#include "sysemu.h"
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#include "hw.h"
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#include "elf.h"
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#include "net.h"
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#include "hw/boards.h"
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#include "hw/ppc.h"
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@ -334,6 +335,24 @@ static void ppc_spapr_init(ram_addr_t ram_size,
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}
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}
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for (i = 0; i < nb_nics; i++, irq++) {
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NICInfo *nd = &nd_table[i];
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if (!nd->model) {
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nd->model = qemu_strdup("ibmveth");
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}
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if (strcmp(nd->model, "ibmveth") == 0) {
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spapr_vlan_create(spapr->vio_bus, 0x1000 + i, nd,
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xics_find_qirq(spapr->icp, irq), irq);
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} else {
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fprintf(stderr, "pSeries (sPAPR) platform does not support "
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"NIC model '%s' (only ibmveth is supported)\n",
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nd->model);
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exit(1);
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}
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}
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if (kernel_filename) {
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uint64_t lowaddr = 0;
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521
hw/spapr_llan.c
Normal file
521
hw/spapr_llan.c
Normal file
@ -0,0 +1,521 @@
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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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VIOsPAPRBus *bus;
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bus = DO_UPCAST(VIOsPAPRBus, bus, sdev->qdev.parent_bus);
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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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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_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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}
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return 0;
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}
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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;
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#ifdef DEBUG
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target_ulong mac_address = args[4];
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#endif
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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_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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}
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filter_list_bd = VLAN_VALID_BD(filter_list, SPAPR_VIO_TCE_PAGE_SIZE);
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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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}
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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 for H_REGISTER_LOGICAL_LAN\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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stq_tce(sdev, buf_list, rec_queue);
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stq_tce(sdev, buf_list + 8, filter_list_bd);
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spapr_tce_dma_zero(sdev, buf_list + VLAN_RX_BDS_OFF,
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SPAPR_VIO_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_tce_dma_zero(sdev, VLAN_BD_ADDR(rec_queue), 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(CPUState *env, 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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dev->buf_list = 0;
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dev->rx_bufs = 0;
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dev->isopen = 0;
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return H_SUCCESS;
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}
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static target_ulong h_add_logical_lan_buffer(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 = 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) {
|
||||
hcall_dprintf("Wrong device in h_add_logical_lan_buffer\n");
|
||||
return H_PARAMETER;
|
||||
}
|
||||
|
||||
if ((check_bd(dev, buf, 4) < 0)
|
||||
|| (VLAN_BD_LEN(buf) < 16)) {
|
||||
hcall_dprintf("Bad buffer enqueued in h_add_logical_lan_buffer\n");
|
||||
return H_PARAMETER;
|
||||
}
|
||||
|
||||
if (!dev->isopen || dev->rx_bufs >= VLAN_MAX_BUFS) {
|
||||
return H_RESOURCE;
|
||||
}
|
||||
|
||||
do {
|
||||
dev->add_buf_ptr += 8;
|
||||
if (dev->add_buf_ptr >= SPAPR_VIO_TCE_PAGE_SIZE) {
|
||||
dev->add_buf_ptr = VLAN_RX_BDS_OFF;
|
||||
}
|
||||
|
||||
bd = ldq_tce(sdev, dev->buf_list + dev->add_buf_ptr);
|
||||
} while (bd & VLAN_BD_VALID);
|
||||
|
||||
stq_tce(sdev, dev->buf_list + dev->add_buf_ptr, buf);
|
||||
|
||||
dev->rx_bufs++;
|
||||
|
||||
dprintf("h_add_logical_lan_buffer(): Added buf ptr=%d rx_bufs=%d"
|
||||
" bd=0x%016llx\n", dev->add_buf_ptr, dev->rx_bufs,
|
||||
(unsigned long long)buf);
|
||||
|
||||
return H_SUCCESS;
|
||||
}
|
||||
|
||||
static target_ulong h_send_logical_lan(CPUState *env, sPAPREnvironment *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 = (VIOsPAPRVLANDevice *)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_tce_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(&dev->nic->nc, lbuf, total_len);
|
||||
|
||||
return H_SUCCESS;
|
||||
}
|
||||
|
||||
static target_ulong h_multicast_ctrl(CPUState *env, 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 void vlan_hcalls(VIOsPAPRBus *bus)
|
||||
{
|
||||
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);
|
||||
}
|
||||
|
||||
static VIOsPAPRDeviceInfo spapr_vlan = {
|
||||
.init = spapr_vlan_init,
|
||||
.devnode = spapr_vlan_devnode,
|
||||
.dt_name = "l-lan",
|
||||
.dt_type = "network",
|
||||
.dt_compatible = "IBM,l-lan",
|
||||
.signal_mask = 0x1,
|
||||
.hcalls = vlan_hcalls,
|
||||
.qdev.name = "spapr-vlan",
|
||||
.qdev.size = sizeof(VIOsPAPRVLANDevice),
|
||||
.qdev.props = (Property[]) {
|
||||
DEFINE_PROP_UINT32("reg", VIOsPAPRDevice, reg, 0x1000),
|
||||
DEFINE_PROP_UINT32("dma-window", VIOsPAPRDevice, rtce_window_size,
|
||||
0x10000000),
|
||||
DEFINE_NIC_PROPERTIES(VIOsPAPRVLANDevice, nicconf),
|
||||
DEFINE_PROP_END_OF_LIST(),
|
||||
},
|
||||
};
|
||||
|
||||
static void spapr_vlan_register(void)
|
||||
{
|
||||
spapr_vio_bus_register_withprop(&spapr_vlan);
|
||||
}
|
||||
device_init(spapr_vlan_register);
|
||||
@ -86,4 +86,7 @@ void spapr_vty_create(VIOsPAPRBus *bus,
|
||||
uint32_t reg, CharDriverState *chardev,
|
||||
qemu_irq qirq, uint32_t vio_irq_num);
|
||||
|
||||
void spapr_vlan_create(VIOsPAPRBus *bus, uint32_t reg, NICInfo *nd,
|
||||
qemu_irq qirq, uint32_t vio_irq_num);
|
||||
|
||||
#endif /* _HW_SPAPR_VIO_H */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user