/* * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator * * PAPR Inter-VM Logical Lan, aka ibmveth * * Copyright (c) 2010,2011 David Gibson, IBM Corporation. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * */ #include "hw.h" #include "net.h" #include "hw/qdev.h" #include "hw/spapr.h" #include "hw/spapr_vio.h" #include <libfdt.h> #define ETH_ALEN 6 #define MAX_PACKET_SIZE 65536 /*#define DEBUG*/ #ifdef DEBUG #define dprintf(fmt...) do { fprintf(stderr, fmt); } while (0) #else #define dprintf(fmt...) #endif /* * Virtual LAN device */ typedef uint64_t vlan_bd_t; #define VLAN_BD_VALID 0x8000000000000000ULL #define VLAN_BD_TOGGLE 0x4000000000000000ULL #define VLAN_BD_NO_CSUM 0x0200000000000000ULL #define VLAN_BD_CSUM_GOOD 0x0100000000000000ULL #define VLAN_BD_LEN_MASK 0x00ffffff00000000ULL #define VLAN_BD_LEN(bd) (((bd) & VLAN_BD_LEN_MASK) >> 32) #define VLAN_BD_ADDR_MASK 0x00000000ffffffffULL #define VLAN_BD_ADDR(bd) ((bd) & VLAN_BD_ADDR_MASK) #define VLAN_VALID_BD(addr, len) (VLAN_BD_VALID | \ (((len) << 32) & VLAN_BD_LEN_MASK) | \ (addr & VLAN_BD_ADDR_MASK)) #define VLAN_RXQC_TOGGLE 0x80 #define VLAN_RXQC_VALID 0x40 #define VLAN_RXQC_NO_CSUM 0x02 #define VLAN_RXQC_CSUM_GOOD 0x01 #define VLAN_RQ_ALIGNMENT 16 #define VLAN_RXQ_BD_OFF 0 #define VLAN_FILTER_BD_OFF 8 #define VLAN_RX_BDS_OFF 16 #define VLAN_MAX_BUFS ((SPAPR_VIO_TCE_PAGE_SIZE - VLAN_RX_BDS_OFF) / 8) typedef struct VIOsPAPRVLANDevice { VIOsPAPRDevice sdev; NICConf nicconf; NICState *nic; int isopen; target_ulong buf_list; int add_buf_ptr, use_buf_ptr, rx_bufs; target_ulong rxq_ptr; } VIOsPAPRVLANDevice; static int spapr_vlan_can_receive(VLANClientState *nc) { VIOsPAPRVLANDevice *dev = DO_UPCAST(NICState, nc, nc)->opaque; return (dev->isopen && dev->rx_bufs > 0); } static ssize_t spapr_vlan_receive(VLANClientState *nc, const uint8_t *buf, size_t size) { VIOsPAPRDevice *sdev = DO_UPCAST(NICState, nc, nc)->opaque; VIOsPAPRVLANDevice *dev = (VIOsPAPRVLANDevice *)sdev; vlan_bd_t rxq_bd = ldq_tce(sdev, dev->buf_list + VLAN_RXQ_BD_OFF); vlan_bd_t bd; int buf_ptr = dev->use_buf_ptr; uint64_t handle; uint8_t control; dprintf("spapr_vlan_receive() [%s] rx_bufs=%d\n", sdev->qdev.id, dev->rx_bufs); if (!dev->isopen) { return -1; } if (!dev->rx_bufs) { return -1; } do { buf_ptr += 8; if (buf_ptr >= SPAPR_VIO_TCE_PAGE_SIZE) { buf_ptr = VLAN_RX_BDS_OFF; } bd = ldq_tce(sdev, dev->buf_list + buf_ptr); dprintf("use_buf_ptr=%d bd=0x%016llx\n", buf_ptr, (unsigned long long)bd); } while ((!(bd & VLAN_BD_VALID) || (VLAN_BD_LEN(bd) < (size + 8))) && (buf_ptr != dev->use_buf_ptr)); if (!(bd & VLAN_BD_VALID) || (VLAN_BD_LEN(bd) < (size + 8))) { /* Failed to find a suitable buffer */ return -1; } /* Remove the buffer from the pool */ dev->rx_bufs--; dev->use_buf_ptr = buf_ptr; stq_tce(sdev, dev->buf_list + dev->use_buf_ptr, 0); dprintf("Found buffer: ptr=%d num=%d\n", dev->use_buf_ptr, dev->rx_bufs); /* Transfer the packet data */ if (spapr_tce_dma_write(sdev, VLAN_BD_ADDR(bd) + 8, buf, size) < 0) { return -1; } dprintf("spapr_vlan_receive: DMA write completed\n"); /* Update the receive queue */ control = VLAN_RXQC_TOGGLE | VLAN_RXQC_VALID; if (rxq_bd & VLAN_BD_TOGGLE) { control ^= VLAN_RXQC_TOGGLE; } handle = ldq_tce(sdev, VLAN_BD_ADDR(bd)); stq_tce(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr + 8, handle); stw_tce(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr + 4, size); sth_tce(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr + 2, 8); stb_tce(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr, control); dprintf("wrote rxq entry (ptr=0x%llx): 0x%016llx 0x%016llx\n", (unsigned long long)dev->rxq_ptr, (unsigned long long)ldq_tce(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr), (unsigned long long)ldq_tce(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr + 8)); dev->rxq_ptr += 16; if (dev->rxq_ptr >= VLAN_BD_LEN(rxq_bd)) { dev->rxq_ptr = 0; stq_tce(sdev, dev->buf_list + VLAN_RXQ_BD_OFF, rxq_bd ^ VLAN_BD_TOGGLE); } if (sdev->signal_state & 1) { qemu_irq_pulse(sdev->qirq); } return size; } static NetClientInfo net_spapr_vlan_info = { .type = NET_CLIENT_TYPE_NIC, .size = sizeof(NICState), .can_receive = spapr_vlan_can_receive, .receive = spapr_vlan_receive, }; static int spapr_vlan_init(VIOsPAPRDevice *sdev) { VIOsPAPRVLANDevice *dev = (VIOsPAPRVLANDevice *)sdev; qemu_macaddr_default_if_unset(&dev->nicconf.macaddr); dev->nic = qemu_new_nic(&net_spapr_vlan_info, &dev->nicconf, sdev->qdev.info->name, sdev->qdev.id, dev); qemu_format_nic_info_str(&dev->nic->nc, dev->nicconf.macaddr.a); return 0; } void spapr_vlan_create(VIOsPAPRBus *bus, uint32_t reg, NICInfo *nd, qemu_irq qirq, uint32_t vio_irq_num) { DeviceState *dev; VIOsPAPRDevice *sdev; dev = qdev_create(&bus->bus, "spapr-vlan"); qdev_prop_set_uint32(dev, "reg", reg); qdev_set_nic_properties(dev, nd); qdev_init_nofail(dev); sdev = (VIOsPAPRDevice *)dev; sdev->qirq = qirq; sdev->vio_irq_num = vio_irq_num; } static int spapr_vlan_devnode(VIOsPAPRDevice *dev, void *fdt, int node_off) { VIOsPAPRVLANDevice *vdev = (VIOsPAPRVLANDevice *)dev; uint8_t padded_mac[8] = {0, 0}; int ret; /* Some old phyp versions give the mac address in an 8-byte * property. The kernel driver has an insane workaround for this; * rather than doing the obvious thing and checking the property * length, it checks whether the first byte has 0b10 in the low * bits. If a correct 6-byte property has a different first byte * the kernel will get the wrong mac address, overrunning its * buffer in the process (read only, thank goodness). * * Here we workaround the kernel workaround by always supplying an * 8-byte property, with the mac address in the last six bytes */ memcpy(&padded_mac[2], &vdev->nicconf.macaddr, ETH_ALEN); ret = fdt_setprop(fdt, node_off, "local-mac-address", padded_mac, sizeof(padded_mac)); if (ret < 0) { return ret; } ret = fdt_setprop_cell(fdt, node_off, "ibm,mac-address-filters", 0); if (ret < 0) { return ret; } return 0; } static int check_bd(VIOsPAPRVLANDevice *dev, vlan_bd_t bd, target_ulong alignment) { if ((VLAN_BD_ADDR(bd) % alignment) || (VLAN_BD_LEN(bd) % alignment)) { return -1; } if (spapr_vio_check_tces(&dev->sdev, VLAN_BD_ADDR(bd), VLAN_BD_LEN(bd), SPAPR_TCE_RW) != 0) { return -1; } return 0; } static target_ulong h_register_logical_lan(CPUState *env, sPAPREnvironment *spapr, target_ulong opcode, target_ulong *args) { target_ulong reg = args[0]; target_ulong buf_list = args[1]; target_ulong rec_queue = args[2]; target_ulong filter_list = args[3]; VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); VIOsPAPRVLANDevice *dev = (VIOsPAPRVLANDevice *)sdev; vlan_bd_t filter_list_bd; if (!dev) { return H_PARAMETER; } if (dev->isopen) { hcall_dprintf("H_REGISTER_LOGICAL_LAN called twice without " "H_FREE_LOGICAL_LAN\n"); return H_RESOURCE; } if (check_bd(dev, VLAN_VALID_BD(buf_list, SPAPR_VIO_TCE_PAGE_SIZE), SPAPR_VIO_TCE_PAGE_SIZE) < 0) { hcall_dprintf("Bad buf_list 0x" TARGET_FMT_lx " for " "H_REGISTER_LOGICAL_LAN\n", buf_list); return H_PARAMETER; } filter_list_bd = VLAN_VALID_BD(filter_list, SPAPR_VIO_TCE_PAGE_SIZE); if (check_bd(dev, filter_list_bd, SPAPR_VIO_TCE_PAGE_SIZE) < 0) { hcall_dprintf("Bad filter_list 0x" TARGET_FMT_lx " for " "H_REGISTER_LOGICAL_LAN\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 for H_REGISTER_LOGICAL_LAN\n"); return H_PARAMETER; } dev->buf_list = buf_list; sdev->signal_state = 0; rec_queue &= ~VLAN_BD_TOGGLE; /* Initialize the buffer list */ stq_tce(sdev, buf_list, rec_queue); stq_tce(sdev, buf_list + 8, filter_list_bd); spapr_tce_dma_zero(sdev, buf_list + VLAN_RX_BDS_OFF, SPAPR_VIO_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_tce_dma_zero(sdev, VLAN_BD_ADDR(rec_queue), VLAN_BD_LEN(rec_queue)); dev->isopen = 1; return H_SUCCESS; } static target_ulong h_free_logical_lan(CPUState *env, sPAPREnvironment *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 = (VIOsPAPRVLANDevice *)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; } dev->buf_list = 0; dev->rx_bufs = 0; dev->isopen = 0; return H_SUCCESS; } static target_ulong h_add_logical_lan_buffer(CPUState *env, sPAPREnvironment *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 = (VIOsPAPRVLANDevice *)sdev; vlan_bd_t bd; dprintf("H_ADD_LOGICAL_LAN_BUFFER(0x" TARGET_FMT_lx ", 0x" TARGET_FMT_lx ")\n", reg, buf); 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);