| /* |
| * 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; |
| VIOsPAPRBus *bus; |
| |
| bus = DO_UPCAST(VIOsPAPRBus, bus, sdev->qdev.parent_bus); |
| |
| 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); |
