diff options
Diffstat (limited to 'hw/net/spapr_llan.c')
| -rw-r--r-- | hw/net/spapr_llan.c | 885 |
1 files changed, 885 insertions, 0 deletions
diff --git a/hw/net/spapr_llan.c b/hw/net/spapr_llan.c new file mode 100644 index 000000000..a6876a936 --- /dev/null +++ b/hw/net/spapr_llan.c @@ -0,0 +1,885 @@ +/* + * 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 "qemu/osdep.h" +#include "qemu/log.h" +#include "qemu/module.h" +#include "net/net.h" +#include "migration/vmstate.h" +#include "hw/ppc/spapr.h" +#include "hw/ppc/spapr_vio.h" +#include "hw/qdev-properties.h" +#include "sysemu/sysemu.h" +#include "trace.h" + +#include <libfdt.h> +#include "qom/object.h" + +#define ETH_ALEN 6 +#define MAX_PACKET_SIZE 65536 + +/* Compatibility flags for migration */ +#define SPAPRVLAN_FLAG_RX_BUF_POOLS_BIT 0 +#define SPAPRVLAN_FLAG_RX_BUF_POOLS (1 << SPAPRVLAN_FLAG_RX_BUF_POOLS_BIT) + +/* + * 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 +/* + * The final 8 bytes of the buffer list is a counter of frames dropped + * because there was not a buffer in the buffer list capable of holding + * the frame. We must avoid it, or the operating system will report garbage + * for this statistic. + */ +#define VLAN_RX_BDS_LEN (SPAPR_TCE_PAGE_SIZE - VLAN_RX_BDS_OFF - 8) +#define VLAN_MAX_BUFS (VLAN_RX_BDS_LEN / 8) + +#define TYPE_VIO_SPAPR_VLAN_DEVICE "spapr-vlan" +OBJECT_DECLARE_SIMPLE_TYPE(SpaprVioVlan, VIO_SPAPR_VLAN_DEVICE) + +#define RX_POOL_MAX_BDS 4096 +#define RX_MAX_POOLS 5 + +typedef struct { + int32_t bufsize; + int32_t count; + vlan_bd_t bds[RX_POOL_MAX_BDS]; +} RxBufPool; + +struct SpaprVioVlan { + SpaprVioDevice sdev; + NICConf nicconf; + NICState *nic; + MACAddr perm_mac; + bool isopen; + hwaddr buf_list; + uint32_t add_buf_ptr, use_buf_ptr, rx_bufs; + hwaddr rxq_ptr; + QEMUTimer *rxp_timer; + uint32_t compat_flags; /* Compatibility flags for migration */ + RxBufPool *rx_pool[RX_MAX_POOLS]; /* Receive buffer descriptor pools */ +}; + +static bool spapr_vlan_can_receive(NetClientState *nc) +{ + SpaprVioVlan *dev = qemu_get_nic_opaque(nc); + + return dev->isopen && dev->rx_bufs > 0; +} + +/** + * The last 8 bytes of the receive buffer list page (that has been + * supplied by the guest with the H_REGISTER_LOGICAL_LAN call) contain + * a counter for frames that have been dropped because there was no + * suitable receive buffer available. This function is used to increase + * this counter by one. + */ +static void spapr_vlan_record_dropped_rx_frame(SpaprVioVlan *dev) +{ + uint64_t cnt; + + cnt = vio_ldq(&dev->sdev, dev->buf_list + 4096 - 8); + vio_stq(&dev->sdev, dev->buf_list + 4096 - 8, cnt + 1); +} + +/** + * Get buffer descriptor from one of our receive buffer pools + */ +static vlan_bd_t spapr_vlan_get_rx_bd_from_pool(SpaprVioVlan *dev, + size_t size) +{ + vlan_bd_t bd; + int pool; + + for (pool = 0; pool < RX_MAX_POOLS; pool++) { + if (dev->rx_pool[pool]->count > 0 && + dev->rx_pool[pool]->bufsize >= size + 8) { + break; + } + } + if (pool == RX_MAX_POOLS) { + /* Failed to find a suitable buffer */ + return 0; + } + + + trace_spapr_vlan_get_rx_bd_from_pool_found(pool, + dev->rx_pool[pool]->count, + dev->rx_bufs); + + /* Remove the buffer from the pool */ + dev->rx_pool[pool]->count--; + bd = dev->rx_pool[pool]->bds[dev->rx_pool[pool]->count]; + dev->rx_pool[pool]->bds[dev->rx_pool[pool]->count] = 0; + + return bd; +} + +/** + * Get buffer descriptor from the receive buffer list page that has been + * supplied by the guest with the H_REGISTER_LOGICAL_LAN call + */ +static vlan_bd_t spapr_vlan_get_rx_bd_from_page(SpaprVioVlan *dev, + size_t size) +{ + int buf_ptr = dev->use_buf_ptr; + vlan_bd_t bd; + + do { + buf_ptr += 8; + if (buf_ptr >= VLAN_RX_BDS_LEN + VLAN_RX_BDS_OFF) { + buf_ptr = VLAN_RX_BDS_OFF; + } + + bd = vio_ldq(&dev->sdev, dev->buf_list + buf_ptr); + + trace_spapr_vlan_get_rx_bd_from_page(buf_ptr, (uint64_t)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 0; + } + + /* Remove the buffer from the pool */ + dev->use_buf_ptr = buf_ptr; + vio_stq(&dev->sdev, dev->buf_list + dev->use_buf_ptr, 0); + + trace_spapr_vlan_get_rx_bd_from_page_found(dev->use_buf_ptr, dev->rx_bufs); + + return bd; +} + +static ssize_t spapr_vlan_receive(NetClientState *nc, const uint8_t *buf, + size_t size) +{ + SpaprVioVlan *dev = qemu_get_nic_opaque(nc); + SpaprVioDevice *sdev = VIO_SPAPR_DEVICE(dev); + vlan_bd_t rxq_bd = vio_ldq(sdev, dev->buf_list + VLAN_RXQ_BD_OFF); + vlan_bd_t bd; + uint64_t handle; + uint8_t control; + + trace_spapr_vlan_receive(sdev->qdev.id, dev->rx_bufs); + + if (!dev->isopen) { + return -1; + } + + if (!dev->rx_bufs) { + spapr_vlan_record_dropped_rx_frame(dev); + return 0; + } + + if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) { + bd = spapr_vlan_get_rx_bd_from_pool(dev, size); + } else { + bd = spapr_vlan_get_rx_bd_from_page(dev, size); + } + if (!bd) { + spapr_vlan_record_dropped_rx_frame(dev); + return 0; + } + + dev->rx_bufs--; + + /* Transfer the packet data */ + if (spapr_vio_dma_write(sdev, VLAN_BD_ADDR(bd) + 8, buf, size) < 0) { + return -1; + } + + trace_spapr_vlan_receive_dma_completed(); + + /* 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); + + trace_spapr_vlan_receive_wrote(dev->rxq_ptr, + vio_ldq(sdev, VLAN_BD_ADDR(rxq_bd) + + dev->rxq_ptr), + 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) { + spapr_vio_irq_pulse(sdev); + } + + return size; +} + +static NetClientInfo net_spapr_vlan_info = { + .type = NET_CLIENT_DRIVER_NIC, + .size = sizeof(NICState), + .can_receive = spapr_vlan_can_receive, + .receive = spapr_vlan_receive, +}; + +static void spapr_vlan_flush_rx_queue(void *opaque) +{ + SpaprVioVlan *dev = opaque; + + qemu_flush_queued_packets(qemu_get_queue(dev->nic)); +} + +static void spapr_vlan_reset_rx_pool(RxBufPool *rxp) +{ + /* + * Use INT_MAX as bufsize so that unused buffers are moved to the end + * of the list during the qsort in spapr_vlan_add_rxbuf_to_pool() later. + */ + rxp->bufsize = INT_MAX; + rxp->count = 0; + memset(rxp->bds, 0, sizeof(rxp->bds)); +} + +static void spapr_vlan_reset(SpaprVioDevice *sdev) +{ + SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(sdev); + int i; + + dev->buf_list = 0; + dev->rx_bufs = 0; + dev->isopen = 0; + + if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) { + for (i = 0; i < RX_MAX_POOLS; i++) { + spapr_vlan_reset_rx_pool(dev->rx_pool[i]); + } + } + + memcpy(&dev->nicconf.macaddr.a, &dev->perm_mac.a, + sizeof(dev->nicconf.macaddr.a)); + qemu_format_nic_info_str(qemu_get_queue(dev->nic), dev->nicconf.macaddr.a); +} + +static void spapr_vlan_realize(SpaprVioDevice *sdev, Error **errp) +{ + SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(sdev); + + qemu_macaddr_default_if_unset(&dev->nicconf.macaddr); + + memcpy(&dev->perm_mac.a, &dev->nicconf.macaddr.a, sizeof(dev->perm_mac.a)); + + 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); + + dev->rxp_timer = timer_new_us(QEMU_CLOCK_VIRTUAL, spapr_vlan_flush_rx_queue, + dev); +} + +static void spapr_vlan_instance_init(Object *obj) +{ + SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(obj); + int i; + + device_add_bootindex_property(obj, &dev->nicconf.bootindex, + "bootindex", "", + DEVICE(dev)); + + if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) { + for (i = 0; i < RX_MAX_POOLS; i++) { + dev->rx_pool[i] = g_new(RxBufPool, 1); + spapr_vlan_reset_rx_pool(dev->rx_pool[i]); + } + } +} + +static void spapr_vlan_instance_finalize(Object *obj) +{ + SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(obj); + int i; + + if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) { + for (i = 0; i < RX_MAX_POOLS; i++) { + g_free(dev->rx_pool[i]); + dev->rx_pool[i] = NULL; + } + } + + if (dev->rxp_timer) { + timer_free(dev->rxp_timer); + } +} + +void spapr_vlan_create(SpaprVioBus *bus, NICInfo *nd) +{ + DeviceState *dev; + + dev = qdev_new("spapr-vlan"); + + qdev_set_nic_properties(dev, nd); + + qdev_realize_and_unref(dev, &bus->bus, &error_fatal); +} + +static int spapr_vlan_devnode(SpaprVioDevice *dev, void *fdt, int node_off) +{ + SpaprVioVlan *vdev = VIO_SPAPR_VLAN_DEVICE(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 (before 3.10) has an insane workaround; + * 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 return a 6-byte address unless that would break a pre-3.10 + * driver. In that case we return a padded 8-byte address to allow the old + * workaround to succeed. */ + if ((vdev->nicconf.macaddr.a[0] & 0x3) == 0x2) { + ret = fdt_setprop(fdt, node_off, "local-mac-address", + &vdev->nicconf.macaddr, ETH_ALEN); + } else { + 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(SpaprVioVlan *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, + SpaprMachineState *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]; + SpaprVioDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); + SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(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; + 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]; + SpaprVioDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); + SpaprVioVlan *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(SpaprVioVlan *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(SpaprVioVlan *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 in the meantime, 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); + trace_spapr_vlan_add_rxbuf_to_pool_create(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; + } + + trace_spapr_vlan_add_rxbuf_to_pool(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(SpaprVioVlan *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); + + trace_spapr_vlan_add_rxbuf_to_page(dev->add_buf_ptr, dev->rx_bufs, 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]; + SpaprVioDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); + SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(sdev); + target_long ret; + + trace_spapr_vlan_h_add_logical_lan_buffer(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]; + SpaprVioDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); + SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(sdev); + unsigned total_len; + uint8_t *p; + g_autofree uint8_t *lbuf = NULL; + int i, nbufs; + int ret; + + trace_spapr_vlan_h_send_logical_lan(reg, continue_token); + + if (!sdev) { + return H_PARAMETER; + } + + trace_spapr_vlan_h_send_logical_lan_rxbufs(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++) { + trace_spapr_vlan_h_send_logical_lan_buf_desc(bufs[i]); + if (!(bufs[i] & VLAN_BD_VALID)) { + break; + } + total_len += VLAN_BD_LEN(bufs[i]); + } + + nbufs = i; + trace_spapr_vlan_h_send_logical_lan_total(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 = g_malloc(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]; + SpaprVioDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); + + if (!dev) { + return H_PARAMETER; + } + + return H_SUCCESS; +} + +static target_ulong h_change_logical_lan_mac(PowerPCCPU *cpu, + SpaprMachineState *spapr, + target_ulong opcode, + target_ulong *args) +{ + target_ulong reg = args[0]; + target_ulong macaddr = args[1]; + SpaprVioDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); + SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(sdev); + int i; + + for (i = 0; i < ETH_ALEN; i++) { + dev->nicconf.macaddr.a[ETH_ALEN - i - 1] = macaddr & 0xff; + macaddr >>= 8; + } + + qemu_format_nic_info_str(qemu_get_queue(dev->nic), dev->nicconf.macaddr.a); + + return H_SUCCESS; +} + +static Property spapr_vlan_properties[] = { + DEFINE_SPAPR_PROPERTIES(SpaprVioVlan, sdev), + DEFINE_NIC_PROPERTIES(SpaprVioVlan, nicconf), + DEFINE_PROP_BIT("use-rx-buffer-pools", SpaprVioVlan, + compat_flags, SPAPRVLAN_FLAG_RX_BUF_POOLS_BIT, true), + DEFINE_PROP_END_OF_LIST(), +}; + +static bool spapr_vlan_rx_buffer_pools_needed(void *opaque) +{ + SpaprVioVlan *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, SpaprVioVlan, + 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, SpaprVioVlan), + /* LLAN state */ + VMSTATE_BOOL(isopen, SpaprVioVlan), + VMSTATE_UINT64(buf_list, SpaprVioVlan), + VMSTATE_UINT32(add_buf_ptr, SpaprVioVlan), + VMSTATE_UINT32(use_buf_ptr, SpaprVioVlan), + VMSTATE_UINT32(rx_bufs, SpaprVioVlan), + VMSTATE_UINT64(rxq_ptr, SpaprVioVlan), + + 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); + SpaprVioDeviceClass *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); + device_class_set_props(dc, 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(SpaprVioVlan), + .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); + spapr_register_hypercall(H_CHANGE_LOGICAL_LAN_MAC, + h_change_logical_lan_mac); + type_register_static(&spapr_vlan_info); +} + +type_init(spapr_vlan_register_types) |