diff options
Diffstat (limited to 'hw/net/spapr_llan.c')
| -rw-r--r-- | hw/net/spapr_llan.c | 531 |
1 files changed, 531 insertions, 0 deletions
diff --git a/hw/net/spapr_llan.c b/hw/net/spapr_llan.c new file mode 100644 index 0000000000..34332f2452 --- /dev/null +++ b/hw/net/spapr_llan.c @@ -0,0 +1,531 @@ +/* + * 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/hw.h" +#include "net/net.h" +#include "hw/qdev.h" +#include "hw/ppc/spapr.h" +#include "hw/ppc/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_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(NetClientState *nc) +{ + VIOsPAPRVLANDevice *dev = qemu_get_nic_opaque(nc); + + return (dev->isopen && dev->rx_bufs > 0); +} + +static ssize_t spapr_vlan_receive(NetClientState *nc, const uint8_t *buf, + size_t size) +{ + VIOsPAPRDevice *sdev = qemu_get_nic_opaque(nc); + VIOsPAPRVLANDevice *dev = (VIOsPAPRVLANDevice *)sdev; + vlan_bd_t rxq_bd = vio_ldq(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_TCE_PAGE_SIZE) { + buf_ptr = VLAN_RX_BDS_OFF; + } + + bd = vio_ldq(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; + vio_stq(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_vio_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 = vio_ldq(sdev, VLAN_BD_ADDR(bd)); + vio_stq(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr + 8, handle); + vio_stl(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr + 4, size); + vio_sth(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr + 2, 8); + vio_stb(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)vio_ldq(sdev, VLAN_BD_ADDR(rxq_bd) + + dev->rxq_ptr), + (unsigned long long)vio_ldq(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; + vio_stq(sdev, dev->buf_list + VLAN_RXQ_BD_OFF, rxq_bd ^ VLAN_BD_TOGGLE); + } + + if (sdev->signal_state & 1) { + qemu_irq_pulse(spapr_vio_qirq(sdev)); + } + + return size; +} + +static void spapr_vlan_cleanup(NetClientState *nc) +{ + VIOsPAPRVLANDevice *dev = qemu_get_nic_opaque(nc); + + dev->nic = NULL; +} + +static NetClientInfo net_spapr_vlan_info = { + .type = NET_CLIENT_OPTIONS_KIND_NIC, + .size = sizeof(NICState), + .can_receive = spapr_vlan_can_receive, + .receive = spapr_vlan_receive, + .cleanup = spapr_vlan_cleanup, +}; + +static void spapr_vlan_reset(VIOsPAPRDevice *sdev) +{ + VIOsPAPRVLANDevice *dev = DO_UPCAST(VIOsPAPRVLANDevice, sdev, sdev); + + dev->buf_list = 0; + dev->rx_bufs = 0; + dev->isopen = 0; +} + +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, + object_get_typename(OBJECT(sdev)), sdev->qdev.id, dev); + qemu_format_nic_info_str(qemu_get_queue(dev->nic), dev->nicconf.macaddr.a); + + return 0; +} + +void spapr_vlan_create(VIOsPAPRBus *bus, NICInfo *nd) +{ + DeviceState *dev; + + dev = qdev_create(&bus->bus, "spapr-vlan"); + + qdev_set_nic_properties(dev, nd); + + qdev_init_nofail(dev); +} + +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_dma_valid(&dev->sdev, VLAN_BD_ADDR(bd), + VLAN_BD_LEN(bd), DMA_DIRECTION_FROM_DEVICE) + || !spapr_vio_dma_valid(&dev->sdev, VLAN_BD_ADDR(bd), + VLAN_BD_LEN(bd), DMA_DIRECTION_TO_DEVICE)) { + return -1; + } + + return 0; +} + +static target_ulong h_register_logical_lan(PowerPCCPU *cpu, + 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_TCE_PAGE_SIZE), + SPAPR_TCE_PAGE_SIZE) < 0) { + hcall_dprintf("Bad buf_list 0x" TARGET_FMT_lx "\n", buf_list); + return H_PARAMETER; + } + + 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; + return H_SUCCESS; +} + + +static target_ulong h_free_logical_lan(PowerPCCPU *cpu, 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; + } + + spapr_vlan_reset(sdev); + return H_SUCCESS; +} + +static target_ulong h_add_logical_lan_buffer(PowerPCCPU *cpu, + 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("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 || dev->rx_bufs >= VLAN_MAX_BUFS) { + return H_RESOURCE; + } + + do { + dev->add_buf_ptr += 8; + if (dev->add_buf_ptr >= SPAPR_TCE_PAGE_SIZE) { + dev->add_buf_ptr = VLAN_RX_BDS_OFF; + } + + bd = vio_ldq(sdev, dev->buf_list + dev->add_buf_ptr); + } while (bd & VLAN_BD_VALID); + + vio_stq(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(PowerPCCPU *cpu, 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_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, sPAPREnvironment *spapr, + target_ulong opcode, target_ulong *args) +{ + target_ulong reg = args[0]; + VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); + + if (!dev) { + return H_PARAMETER; + } + + return H_SUCCESS; +} + +static Property spapr_vlan_properties[] = { + DEFINE_SPAPR_PROPERTIES(VIOsPAPRVLANDevice, sdev), + DEFINE_NIC_PROPERTIES(VIOsPAPRVLANDevice, nicconf), + DEFINE_PROP_END_OF_LIST(), +}; + +static void spapr_vlan_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + VIOsPAPRDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass); + + k->init = spapr_vlan_init; + k->reset = spapr_vlan_reset; + k->devnode = spapr_vlan_devnode; + k->dt_name = "l-lan"; + k->dt_type = "network"; + k->dt_compatible = "IBM,l-lan"; + k->signal_mask = 0x1; + dc->props = spapr_vlan_properties; + k->rtce_window_size = 0x10000000; +} + +static const TypeInfo spapr_vlan_info = { + .name = "spapr-vlan", + .parent = TYPE_VIO_SPAPR_DEVICE, + .instance_size = sizeof(VIOsPAPRVLANDevice), + .class_init = spapr_vlan_class_init, +}; + +static void spapr_vlan_register_types(void) +{ + spapr_register_hypercall(H_REGISTER_LOGICAL_LAN, h_register_logical_lan); + spapr_register_hypercall(H_FREE_LOGICAL_LAN, h_free_logical_lan); + spapr_register_hypercall(H_SEND_LOGICAL_LAN, h_send_logical_lan); + spapr_register_hypercall(H_ADD_LOGICAL_LAN_BUFFER, + h_add_logical_lan_buffer); + spapr_register_hypercall(H_MULTICAST_CTRL, h_multicast_ctrl); + type_register_static(&spapr_vlan_info); +} + +type_init(spapr_vlan_register_types) |