| 1 | /* |
| 2 | * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator |
| 3 | * |
| 4 | * PAPR Inter-VM Logical Lan, aka ibmveth |
| 5 | * |
| 6 | * Copyright (c) 2010,2011 David Gibson, IBM Corporation. |
| 7 | * |
| 8 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 9 | * of this software and associated documentation files (the "Software"), to deal |
| 10 | * in the Software without restriction, including without limitation the rights |
| 11 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 12 | * copies of the Software, and to permit persons to whom the Software is |
| 13 | * furnished to do so, subject to the following conditions: |
| 14 | * |
| 15 | * The above copyright notice and this permission notice shall be included in |
| 16 | * all copies or substantial portions of the Software. |
| 17 | * |
| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 20 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 21 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 22 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 23 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 24 | * THE SOFTWARE. |
| 25 | * |
| 26 | */ |
| 27 | |
| 28 | #include "qemu/osdep.h" |
| 29 | #include "qemu/log.h" |
| 30 | #include "qemu/module.h" |
| 31 | #include "net/net.h" |
| 32 | #include "migration/vmstate.h" |
| 33 | #include "hw/ppc/spapr.h" |
| 34 | #include "hw/ppc/spapr_vio.h" |
| 35 | #include "hw/core/qdev-properties.h" |
| 36 | #include "system/system.h" |
| 37 | #include "trace.h" |
| 38 | |
| 39 | #include <libfdt.h> |
| 40 | #include "qom/object.h" |
| 41 | |
| 42 | #define ETH_ALEN 6 |
| 43 | #define MAX_PACKET_SIZE 65536 |
| 44 | |
| 45 | /* Compatibility flags for migration */ |
| 46 | #define SPAPRVLAN_FLAG_RX_BUF_POOLS_BIT 0 |
| 47 | #define SPAPRVLAN_FLAG_RX_BUF_POOLS (1 << SPAPRVLAN_FLAG_RX_BUF_POOLS_BIT) |
| 48 | |
| 49 | /* |
| 50 | * Virtual LAN device |
| 51 | */ |
| 52 | |
| 53 | typedef uint64_t vlan_bd_t; |
| 54 | |
| 55 | #define VLAN_BD_VALID 0x8000000000000000ULL |
| 56 | #define VLAN_BD_TOGGLE 0x4000000000000000ULL |
| 57 | #define VLAN_BD_NO_CSUM 0x0200000000000000ULL |
| 58 | #define VLAN_BD_CSUM_GOOD 0x0100000000000000ULL |
| 59 | #define VLAN_BD_LEN_MASK 0x00ffffff00000000ULL |
| 60 | #define VLAN_BD_LEN(bd) (((bd) & VLAN_BD_LEN_MASK) >> 32) |
| 61 | #define VLAN_BD_ADDR_MASK 0x00000000ffffffffULL |
| 62 | #define VLAN_BD_ADDR(bd) ((bd) & VLAN_BD_ADDR_MASK) |
| 63 | |
| 64 | #define VLAN_VALID_BD(addr, len) (VLAN_BD_VALID | \ |
| 65 | (((len) << 32) & VLAN_BD_LEN_MASK) | \ |
| 66 | (addr & VLAN_BD_ADDR_MASK)) |
| 67 | |
| 68 | #define VLAN_RXQC_TOGGLE 0x80 |
| 69 | #define VLAN_RXQC_VALID 0x40 |
| 70 | #define VLAN_RXQC_NO_CSUM 0x02 |
| 71 | #define VLAN_RXQC_CSUM_GOOD 0x01 |
| 72 | |
| 73 | #define VLAN_RQ_ALIGNMENT 16 |
| 74 | #define VLAN_RXQ_BD_OFF 0 |
| 75 | #define VLAN_FILTER_BD_OFF 8 |
| 76 | #define VLAN_RX_BDS_OFF 16 |
| 77 | /* |
| 78 | * The final 8 bytes of the buffer list is a counter of frames dropped |
| 79 | * because there was not a buffer in the buffer list capable of holding |
| 80 | * the frame. We must avoid it, or the operating system will report garbage |
| 81 | * for this statistic. |
| 82 | */ |
| 83 | #define VLAN_RX_BDS_LEN (SPAPR_TCE_PAGE_SIZE - VLAN_RX_BDS_OFF - 8) |
| 84 | #define VLAN_MAX_BUFS (VLAN_RX_BDS_LEN / 8) |
| 85 | |
| 86 | #define TYPE_VIO_SPAPR_VLAN_DEVICE "spapr-vlan" |
| 87 | OBJECT_DECLARE_SIMPLE_TYPE(SpaprVioVlan, VIO_SPAPR_VLAN_DEVICE) |
| 88 | |
| 89 | #define RX_POOL_MAX_BDS 4096 |
| 90 | #define RX_MAX_POOLS 5 |
| 91 | |
| 92 | typedef struct { |
| 93 | int32_t bufsize; |
| 94 | int32_t count; |
| 95 | vlan_bd_t bds[RX_POOL_MAX_BDS]; |
| 96 | } RxBufPool; |
| 97 | |
| 98 | struct SpaprVioVlan { |
| 99 | SpaprVioDevice sdev; |
| 100 | NICConf nicconf; |
| 101 | NICState *nic; |
| 102 | MACAddr perm_mac; |
| 103 | bool isopen; |
| 104 | hwaddr buf_list; |
| 105 | uint32_t add_buf_ptr, use_buf_ptr, rx_bufs; |
| 106 | hwaddr rxq_ptr; |
| 107 | QEMUTimer *rxp_timer; |
| 108 | uint32_t compat_flags; /* Compatibility flags for migration */ |
| 109 | RxBufPool *rx_pool[RX_MAX_POOLS]; /* Receive buffer descriptor pools */ |
| 110 | }; |
| 111 | |
| 112 | static bool spapr_vlan_can_receive(NetClientState *nc) |
| 113 | { |
| 114 | SpaprVioVlan *dev = qemu_get_nic_opaque(nc); |
| 115 | |
| 116 | return dev->isopen && dev->rx_bufs > 0; |
| 117 | } |
| 118 | |
| 119 | /** |
| 120 | * The last 8 bytes of the receive buffer list page (that has been |
| 121 | * supplied by the guest with the H_REGISTER_LOGICAL_LAN call) contain |
| 122 | * a counter for frames that have been dropped because there was no |
| 123 | * suitable receive buffer available. This function is used to increase |
| 124 | * this counter by one. |
| 125 | */ |
| 126 | static void spapr_vlan_record_dropped_rx_frame(SpaprVioVlan *dev) |
| 127 | { |
| 128 | uint64_t cnt; |
| 129 | |
| 130 | cnt = vio_ldq(&dev->sdev, dev->buf_list + 4096 - 8); |
| 131 | vio_stq(&dev->sdev, dev->buf_list + 4096 - 8, cnt + 1); |
| 132 | } |
| 133 | |
| 134 | /** |
| 135 | * Get buffer descriptor from one of our receive buffer pools |
| 136 | */ |
| 137 | static vlan_bd_t spapr_vlan_get_rx_bd_from_pool(SpaprVioVlan *dev, |
| 138 | size_t size) |
| 139 | { |
| 140 | vlan_bd_t bd; |
| 141 | int pool; |
| 142 | |
| 143 | for (pool = 0; pool < RX_MAX_POOLS; pool++) { |
| 144 | if (dev->rx_pool[pool]->count > 0 && |
| 145 | dev->rx_pool[pool]->bufsize >= size + 8) { |
| 146 | break; |
| 147 | } |
| 148 | } |
| 149 | if (pool == RX_MAX_POOLS) { |
| 150 | /* Failed to find a suitable buffer */ |
| 151 | return 0; |
| 152 | } |
| 153 | |
| 154 | |
| 155 | trace_spapr_vlan_get_rx_bd_from_pool_found(pool, |
| 156 | dev->rx_pool[pool]->count, |
| 157 | dev->rx_bufs); |
| 158 | |
| 159 | /* Remove the buffer from the pool */ |
| 160 | dev->rx_pool[pool]->count--; |
| 161 | bd = dev->rx_pool[pool]->bds[dev->rx_pool[pool]->count]; |
| 162 | dev->rx_pool[pool]->bds[dev->rx_pool[pool]->count] = 0; |
| 163 | |
| 164 | return bd; |
| 165 | } |
| 166 | |
| 167 | /** |
| 168 | * Get buffer descriptor from the receive buffer list page that has been |
| 169 | * supplied by the guest with the H_REGISTER_LOGICAL_LAN call |
| 170 | */ |
| 171 | static vlan_bd_t spapr_vlan_get_rx_bd_from_page(SpaprVioVlan *dev, |
| 172 | size_t size) |
| 173 | { |
| 174 | int buf_ptr = dev->use_buf_ptr; |
| 175 | vlan_bd_t bd; |
| 176 | |
| 177 | do { |
| 178 | buf_ptr += 8; |
| 179 | if (buf_ptr >= VLAN_RX_BDS_LEN + VLAN_RX_BDS_OFF) { |
| 180 | buf_ptr = VLAN_RX_BDS_OFF; |
| 181 | } |
| 182 | |
| 183 | bd = vio_ldq(&dev->sdev, dev->buf_list + buf_ptr); |
| 184 | |
| 185 | trace_spapr_vlan_get_rx_bd_from_page(buf_ptr, (uint64_t)bd); |
| 186 | } while ((!(bd & VLAN_BD_VALID) || VLAN_BD_LEN(bd) < size + 8) |
| 187 | && buf_ptr != dev->use_buf_ptr); |
| 188 | |
| 189 | if (!(bd & VLAN_BD_VALID) || VLAN_BD_LEN(bd) < size + 8) { |
| 190 | /* Failed to find a suitable buffer */ |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | /* Remove the buffer from the pool */ |
| 195 | dev->use_buf_ptr = buf_ptr; |
| 196 | vio_stq(&dev->sdev, dev->buf_list + dev->use_buf_ptr, 0); |
| 197 | |
| 198 | trace_spapr_vlan_get_rx_bd_from_page_found(dev->use_buf_ptr, dev->rx_bufs); |
| 199 | |
| 200 | return bd; |
| 201 | } |
| 202 | |
| 203 | static ssize_t spapr_vlan_receive(NetClientState *nc, const uint8_t *buf, |
| 204 | size_t size) |
| 205 | { |
| 206 | SpaprVioVlan *dev = qemu_get_nic_opaque(nc); |
| 207 | SpaprVioDevice *sdev = VIO_SPAPR_DEVICE(dev); |
| 208 | vlan_bd_t rxq_bd = vio_ldq(sdev, dev->buf_list + VLAN_RXQ_BD_OFF); |
| 209 | vlan_bd_t bd; |
| 210 | uint64_t handle; |
| 211 | uint8_t control; |
| 212 | |
| 213 | trace_spapr_vlan_receive(sdev->qdev.id, dev->rx_bufs); |
| 214 | |
| 215 | if (!dev->isopen) { |
| 216 | return -1; |
| 217 | } |
| 218 | |
| 219 | if (!dev->rx_bufs) { |
| 220 | spapr_vlan_record_dropped_rx_frame(dev); |
| 221 | return 0; |
| 222 | } |
| 223 | |
| 224 | if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) { |
| 225 | bd = spapr_vlan_get_rx_bd_from_pool(dev, size); |
| 226 | } else { |
| 227 | bd = spapr_vlan_get_rx_bd_from_page(dev, size); |
| 228 | } |
| 229 | if (!bd) { |
| 230 | spapr_vlan_record_dropped_rx_frame(dev); |
| 231 | return 0; |
| 232 | } |
| 233 | |
| 234 | dev->rx_bufs--; |
| 235 | |
| 236 | /* Transfer the packet data */ |
| 237 | if (spapr_vio_dma_write(sdev, VLAN_BD_ADDR(bd) + 8, buf, size) < 0) { |
| 238 | return -1; |
| 239 | } |
| 240 | |
| 241 | trace_spapr_vlan_receive_dma_completed(); |
| 242 | |
| 243 | /* Update the receive queue */ |
| 244 | control = VLAN_RXQC_TOGGLE | VLAN_RXQC_VALID; |
| 245 | if (rxq_bd & VLAN_BD_TOGGLE) { |
| 246 | control ^= VLAN_RXQC_TOGGLE; |
| 247 | } |
| 248 | |
| 249 | handle = vio_ldq(sdev, VLAN_BD_ADDR(bd)); |
| 250 | vio_stq(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr + 8, handle); |
| 251 | vio_stl(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr + 4, size); |
| 252 | vio_sth(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr + 2, 8); |
| 253 | vio_stb(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr, control); |
| 254 | |
| 255 | trace_spapr_vlan_receive_wrote(dev->rxq_ptr, |
| 256 | vio_ldq(sdev, VLAN_BD_ADDR(rxq_bd) + |
| 257 | dev->rxq_ptr), |
| 258 | vio_ldq(sdev, VLAN_BD_ADDR(rxq_bd) + |
| 259 | dev->rxq_ptr + 8)); |
| 260 | |
| 261 | dev->rxq_ptr += 16; |
| 262 | if (dev->rxq_ptr >= VLAN_BD_LEN(rxq_bd)) { |
| 263 | dev->rxq_ptr = 0; |
| 264 | vio_stq(sdev, dev->buf_list + VLAN_RXQ_BD_OFF, rxq_bd ^ VLAN_BD_TOGGLE); |
| 265 | } |
| 266 | |
| 267 | if (sdev->signal_state & 1) { |
| 268 | spapr_vio_irq_pulse(sdev); |
| 269 | } |
| 270 | |
| 271 | return size; |
| 272 | } |
| 273 | |
| 274 | static NetClientInfo net_spapr_vlan_info = { |
| 275 | .type = NET_CLIENT_DRIVER_NIC, |
| 276 | .size = sizeof(NICState), |
| 277 | .can_receive = spapr_vlan_can_receive, |
| 278 | .receive = spapr_vlan_receive, |
| 279 | }; |
| 280 | |
| 281 | static void spapr_vlan_flush_rx_queue(void *opaque) |
| 282 | { |
| 283 | SpaprVioVlan *dev = opaque; |
| 284 | |
| 285 | qemu_flush_queued_packets(qemu_get_queue(dev->nic)); |
| 286 | } |
| 287 | |
| 288 | static void spapr_vlan_reset_rx_pool(RxBufPool *rxp) |
| 289 | { |
| 290 | /* |
| 291 | * Use INT_MAX as bufsize so that unused buffers are moved to the end |
| 292 | * of the list during the qsort in spapr_vlan_add_rxbuf_to_pool() later. |
| 293 | */ |
| 294 | rxp->bufsize = INT_MAX; |
| 295 | rxp->count = 0; |
| 296 | memset(rxp->bds, 0, sizeof(rxp->bds)); |
| 297 | } |
| 298 | |
| 299 | static void spapr_vlan_reset(SpaprVioDevice *sdev) |
| 300 | { |
| 301 | SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(sdev); |
| 302 | int i; |
| 303 | |
| 304 | dev->buf_list = 0; |
| 305 | dev->rx_bufs = 0; |
| 306 | dev->isopen = 0; |
| 307 | |
| 308 | if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) { |
| 309 | for (i = 0; i < RX_MAX_POOLS; i++) { |
| 310 | spapr_vlan_reset_rx_pool(dev->rx_pool[i]); |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | memcpy(&dev->nicconf.macaddr.a, &dev->perm_mac.a, |
| 315 | sizeof(dev->nicconf.macaddr.a)); |
| 316 | qemu_format_nic_info_str(qemu_get_queue(dev->nic), dev->nicconf.macaddr.a); |
| 317 | } |
| 318 | |
| 319 | static void spapr_vlan_realize(SpaprVioDevice *sdev, Error **errp) |
| 320 | { |
| 321 | SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(sdev); |
| 322 | |
| 323 | qemu_macaddr_default_if_unset(&dev->nicconf.macaddr); |
| 324 | |
| 325 | memcpy(&dev->perm_mac.a, &dev->nicconf.macaddr.a, sizeof(dev->perm_mac.a)); |
| 326 | |
| 327 | dev->nic = qemu_new_nic(&net_spapr_vlan_info, &dev->nicconf, |
| 328 | object_get_typename(OBJECT(sdev)), sdev->qdev.id, |
| 329 | &sdev->qdev.mem_reentrancy_guard, dev); |
| 330 | qemu_format_nic_info_str(qemu_get_queue(dev->nic), dev->nicconf.macaddr.a); |
| 331 | |
| 332 | dev->rxp_timer = timer_new_us(QEMU_CLOCK_VIRTUAL, spapr_vlan_flush_rx_queue, |
| 333 | dev); |
| 334 | } |
| 335 | |
| 336 | static void spapr_vlan_instance_init(Object *obj) |
| 337 | { |
| 338 | SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(obj); |
| 339 | int i; |
| 340 | |
| 341 | device_add_bootindex_property(obj, &dev->nicconf.bootindex, |
| 342 | "bootindex", "", |
| 343 | DEVICE(dev)); |
| 344 | |
| 345 | if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) { |
| 346 | for (i = 0; i < RX_MAX_POOLS; i++) { |
| 347 | dev->rx_pool[i] = g_new(RxBufPool, 1); |
| 348 | spapr_vlan_reset_rx_pool(dev->rx_pool[i]); |
| 349 | } |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | static void spapr_vlan_instance_finalize(Object *obj) |
| 354 | { |
| 355 | SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(obj); |
| 356 | int i; |
| 357 | |
| 358 | if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) { |
| 359 | for (i = 0; i < RX_MAX_POOLS; i++) { |
| 360 | g_free(dev->rx_pool[i]); |
| 361 | dev->rx_pool[i] = NULL; |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | if (dev->rxp_timer) { |
| 366 | timer_free(dev->rxp_timer); |
| 367 | } |
| 368 | } |
| 369 | |
| 370 | void spapr_vlan_create(SpaprVioBus *bus, NICInfo *nd) |
| 371 | { |
| 372 | DeviceState *dev; |
| 373 | |
| 374 | dev = qdev_new("spapr-vlan"); |
| 375 | |
| 376 | qdev_set_nic_properties(dev, nd); |
| 377 | |
| 378 | qdev_realize_and_unref(dev, &bus->bus, &error_fatal); |
| 379 | } |
| 380 | |
| 381 | static int spapr_vlan_devnode(SpaprVioDevice *dev, void *fdt, int node_off) |
| 382 | { |
| 383 | SpaprVioVlan *vdev = VIO_SPAPR_VLAN_DEVICE(dev); |
| 384 | uint8_t padded_mac[8] = {0, 0}; |
| 385 | int ret; |
| 386 | |
| 387 | /* Some old phyp versions give the mac address in an 8-byte |
| 388 | * property. The kernel driver (before 3.10) has an insane workaround; |
| 389 | * rather than doing the obvious thing and checking the property |
| 390 | * length, it checks whether the first byte has 0b10 in the low |
| 391 | * bits. If a correct 6-byte property has a different first byte |
| 392 | * the kernel will get the wrong mac address, overrunning its |
| 393 | * buffer in the process (read only, thank goodness). |
| 394 | * |
| 395 | * Here we return a 6-byte address unless that would break a pre-3.10 |
| 396 | * driver. In that case we return a padded 8-byte address to allow the old |
| 397 | * workaround to succeed. */ |
| 398 | if ((vdev->nicconf.macaddr.a[0] & 0x3) == 0x2) { |
| 399 | ret = fdt_setprop(fdt, node_off, "local-mac-address", |
| 400 | &vdev->nicconf.macaddr, ETH_ALEN); |
| 401 | } else { |
| 402 | memcpy(&padded_mac[2], &vdev->nicconf.macaddr, ETH_ALEN); |
| 403 | ret = fdt_setprop(fdt, node_off, "local-mac-address", |
| 404 | padded_mac, sizeof(padded_mac)); |
| 405 | } |
| 406 | if (ret < 0) { |
| 407 | return ret; |
| 408 | } |
| 409 | |
| 410 | ret = fdt_setprop_cell(fdt, node_off, "ibm,mac-address-filters", 0); |
| 411 | if (ret < 0) { |
| 412 | return ret; |
| 413 | } |
| 414 | |
| 415 | return 0; |
| 416 | } |
| 417 | |
| 418 | static int check_bd(SpaprVioVlan *dev, vlan_bd_t bd, |
| 419 | target_ulong alignment) |
| 420 | { |
| 421 | if ((VLAN_BD_ADDR(bd) % alignment) |
| 422 | || (VLAN_BD_LEN(bd) % alignment)) { |
| 423 | return -1; |
| 424 | } |
| 425 | |
| 426 | if (!spapr_vio_dma_valid(&dev->sdev, VLAN_BD_ADDR(bd), |
| 427 | VLAN_BD_LEN(bd), DMA_DIRECTION_FROM_DEVICE) |
| 428 | || !spapr_vio_dma_valid(&dev->sdev, VLAN_BD_ADDR(bd), |
| 429 | VLAN_BD_LEN(bd), DMA_DIRECTION_TO_DEVICE)) { |
| 430 | return -1; |
| 431 | } |
| 432 | |
| 433 | return 0; |
| 434 | } |
| 435 | |
| 436 | static target_ulong h_register_logical_lan(PowerPCCPU *cpu, |
| 437 | SpaprMachineState *spapr, |
| 438 | target_ulong opcode, |
| 439 | target_ulong *args) |
| 440 | { |
| 441 | target_ulong reg = args[0]; |
| 442 | target_ulong buf_list = args[1]; |
| 443 | target_ulong rec_queue = args[2]; |
| 444 | target_ulong filter_list = args[3]; |
| 445 | SpaprVioDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 446 | SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(sdev); |
| 447 | vlan_bd_t filter_list_bd; |
| 448 | |
| 449 | if (!dev) { |
| 450 | return H_PARAMETER; |
| 451 | } |
| 452 | |
| 453 | if (dev->isopen) { |
| 454 | hcall_dprintf("H_REGISTER_LOGICAL_LAN called twice without " |
| 455 | "H_FREE_LOGICAL_LAN\n"); |
| 456 | return H_RESOURCE; |
| 457 | } |
| 458 | |
| 459 | if (check_bd(dev, VLAN_VALID_BD(buf_list, SPAPR_TCE_PAGE_SIZE), |
| 460 | SPAPR_TCE_PAGE_SIZE) < 0) { |
| 461 | hcall_dprintf("Bad buf_list 0x" TARGET_FMT_lx "\n", buf_list); |
| 462 | return H_PARAMETER; |
| 463 | } |
| 464 | |
| 465 | filter_list_bd = VLAN_VALID_BD(filter_list, SPAPR_TCE_PAGE_SIZE); |
| 466 | if (check_bd(dev, filter_list_bd, SPAPR_TCE_PAGE_SIZE) < 0) { |
| 467 | hcall_dprintf("Bad filter_list 0x" TARGET_FMT_lx "\n", filter_list); |
| 468 | return H_PARAMETER; |
| 469 | } |
| 470 | |
| 471 | if (!(rec_queue & VLAN_BD_VALID) |
| 472 | || (check_bd(dev, rec_queue, VLAN_RQ_ALIGNMENT) < 0)) { |
| 473 | hcall_dprintf("Bad receive queue\n"); |
| 474 | return H_PARAMETER; |
| 475 | } |
| 476 | |
| 477 | dev->buf_list = buf_list; |
| 478 | sdev->signal_state = 0; |
| 479 | |
| 480 | rec_queue &= ~VLAN_BD_TOGGLE; |
| 481 | |
| 482 | /* Initialize the buffer list */ |
| 483 | vio_stq(sdev, buf_list, rec_queue); |
| 484 | vio_stq(sdev, buf_list + 8, filter_list_bd); |
| 485 | spapr_vio_dma_set(sdev, buf_list + VLAN_RX_BDS_OFF, 0, |
| 486 | SPAPR_TCE_PAGE_SIZE - VLAN_RX_BDS_OFF); |
| 487 | dev->add_buf_ptr = VLAN_RX_BDS_OFF - 8; |
| 488 | dev->use_buf_ptr = VLAN_RX_BDS_OFF - 8; |
| 489 | dev->rx_bufs = 0; |
| 490 | dev->rxq_ptr = 0; |
| 491 | |
| 492 | /* Initialize the receive queue */ |
| 493 | spapr_vio_dma_set(sdev, VLAN_BD_ADDR(rec_queue), 0, VLAN_BD_LEN(rec_queue)); |
| 494 | |
| 495 | dev->isopen = 1; |
| 496 | qemu_flush_queued_packets(qemu_get_queue(dev->nic)); |
| 497 | |
| 498 | return H_SUCCESS; |
| 499 | } |
| 500 | |
| 501 | |
| 502 | static target_ulong h_free_logical_lan(PowerPCCPU *cpu, |
| 503 | SpaprMachineState *spapr, |
| 504 | target_ulong opcode, target_ulong *args) |
| 505 | { |
| 506 | target_ulong reg = args[0]; |
| 507 | SpaprVioDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 508 | SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(sdev); |
| 509 | |
| 510 | if (!dev) { |
| 511 | return H_PARAMETER; |
| 512 | } |
| 513 | |
| 514 | if (!dev->isopen) { |
| 515 | hcall_dprintf("H_FREE_LOGICAL_LAN called without " |
| 516 | "H_REGISTER_LOGICAL_LAN\n"); |
| 517 | return H_RESOURCE; |
| 518 | } |
| 519 | |
| 520 | spapr_vlan_reset(sdev); |
| 521 | return H_SUCCESS; |
| 522 | } |
| 523 | |
| 524 | /** |
| 525 | * Used for qsort, this function compares two RxBufPools by size. |
| 526 | */ |
| 527 | static int rx_pool_size_compare(const void *p1, const void *p2) |
| 528 | { |
| 529 | const RxBufPool *pool1 = *(RxBufPool **)p1; |
| 530 | const RxBufPool *pool2 = *(RxBufPool **)p2; |
| 531 | |
| 532 | if (pool1->bufsize < pool2->bufsize) { |
| 533 | return -1; |
| 534 | } |
| 535 | return pool1->bufsize > pool2->bufsize; |
| 536 | } |
| 537 | |
| 538 | /** |
| 539 | * Search for a matching buffer pool with exact matching size, |
| 540 | * or return -1 if no matching pool has been found. |
| 541 | */ |
| 542 | static int spapr_vlan_get_rx_pool_id(SpaprVioVlan *dev, int size) |
| 543 | { |
| 544 | int pool; |
| 545 | |
| 546 | for (pool = 0; pool < RX_MAX_POOLS; pool++) { |
| 547 | if (dev->rx_pool[pool]->bufsize == size) { |
| 548 | return pool; |
| 549 | } |
| 550 | } |
| 551 | |
| 552 | return -1; |
| 553 | } |
| 554 | |
| 555 | /** |
| 556 | * Enqueuing receive buffer by adding it to one of our receive buffer pools |
| 557 | */ |
| 558 | static target_long spapr_vlan_add_rxbuf_to_pool(SpaprVioVlan *dev, |
| 559 | target_ulong buf) |
| 560 | { |
| 561 | int size = VLAN_BD_LEN(buf); |
| 562 | int pool; |
| 563 | |
| 564 | pool = spapr_vlan_get_rx_pool_id(dev, size); |
| 565 | if (pool < 0) { |
| 566 | /* |
| 567 | * No matching pool found? Try to use a new one. If the guest used all |
| 568 | * pools before, but changed the size of one pool in the meantime, we might |
| 569 | * need to recycle that pool here (if it's empty already). Thus scan |
| 570 | * all buffer pools now, starting with the last (likely empty) one. |
| 571 | */ |
| 572 | for (pool = RX_MAX_POOLS - 1; pool >= 0 ; pool--) { |
| 573 | if (dev->rx_pool[pool]->count == 0) { |
| 574 | dev->rx_pool[pool]->bufsize = size; |
| 575 | /* |
| 576 | * Sort pools by size so that spapr_vlan_receive() |
| 577 | * can later find the smallest buffer pool easily. |
| 578 | */ |
| 579 | qsort(dev->rx_pool, RX_MAX_POOLS, sizeof(dev->rx_pool[0]), |
| 580 | rx_pool_size_compare); |
| 581 | pool = spapr_vlan_get_rx_pool_id(dev, size); |
| 582 | trace_spapr_vlan_add_rxbuf_to_pool_create(pool, |
| 583 | VLAN_BD_LEN(buf)); |
| 584 | break; |
| 585 | } |
| 586 | } |
| 587 | } |
| 588 | /* Still no usable pool? Give up */ |
| 589 | if (pool < 0 || dev->rx_pool[pool]->count >= RX_POOL_MAX_BDS) { |
| 590 | return H_RESOURCE; |
| 591 | } |
| 592 | |
| 593 | trace_spapr_vlan_add_rxbuf_to_pool(pool, VLAN_BD_LEN(buf), |
| 594 | dev->rx_pool[pool]->count); |
| 595 | |
| 596 | dev->rx_pool[pool]->bds[dev->rx_pool[pool]->count++] = buf; |
| 597 | |
| 598 | return 0; |
| 599 | } |
| 600 | |
| 601 | /** |
| 602 | * This is the old way of enqueuing receive buffers: Add it to the rx queue |
| 603 | * page that has been supplied by the guest (which is quite limited in size). |
| 604 | */ |
| 605 | static target_long spapr_vlan_add_rxbuf_to_page(SpaprVioVlan *dev, |
| 606 | target_ulong buf) |
| 607 | { |
| 608 | vlan_bd_t bd; |
| 609 | |
| 610 | if (dev->rx_bufs >= VLAN_MAX_BUFS) { |
| 611 | return H_RESOURCE; |
| 612 | } |
| 613 | |
| 614 | do { |
| 615 | dev->add_buf_ptr += 8; |
| 616 | if (dev->add_buf_ptr >= VLAN_RX_BDS_LEN + VLAN_RX_BDS_OFF) { |
| 617 | dev->add_buf_ptr = VLAN_RX_BDS_OFF; |
| 618 | } |
| 619 | |
| 620 | bd = vio_ldq(&dev->sdev, dev->buf_list + dev->add_buf_ptr); |
| 621 | } while (bd & VLAN_BD_VALID); |
| 622 | |
| 623 | vio_stq(&dev->sdev, dev->buf_list + dev->add_buf_ptr, buf); |
| 624 | |
| 625 | trace_spapr_vlan_add_rxbuf_to_page(dev->add_buf_ptr, dev->rx_bufs, buf); |
| 626 | |
| 627 | return 0; |
| 628 | } |
| 629 | |
| 630 | static target_ulong h_add_logical_lan_buffer(PowerPCCPU *cpu, |
| 631 | SpaprMachineState *spapr, |
| 632 | target_ulong opcode, |
| 633 | target_ulong *args) |
| 634 | { |
| 635 | target_ulong reg = args[0]; |
| 636 | target_ulong buf = args[1]; |
| 637 | SpaprVioDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 638 | SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(sdev); |
| 639 | target_long ret; |
| 640 | |
| 641 | trace_spapr_vlan_h_add_logical_lan_buffer(reg, buf); |
| 642 | |
| 643 | if (!sdev) { |
| 644 | hcall_dprintf("Bad device\n"); |
| 645 | return H_PARAMETER; |
| 646 | } |
| 647 | |
| 648 | if ((check_bd(dev, buf, 4) < 0) |
| 649 | || (VLAN_BD_LEN(buf) < 16)) { |
| 650 | hcall_dprintf("Bad buffer enqueued\n"); |
| 651 | return H_PARAMETER; |
| 652 | } |
| 653 | |
| 654 | if (!dev->isopen) { |
| 655 | return H_RESOURCE; |
| 656 | } |
| 657 | |
| 658 | if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) { |
| 659 | ret = spapr_vlan_add_rxbuf_to_pool(dev, buf); |
| 660 | } else { |
| 661 | ret = spapr_vlan_add_rxbuf_to_page(dev, buf); |
| 662 | } |
| 663 | if (ret) { |
| 664 | return ret; |
| 665 | } |
| 666 | |
| 667 | dev->rx_bufs++; |
| 668 | |
| 669 | /* |
| 670 | * Give guest some more time to add additional RX buffers before we |
| 671 | * flush the receive queue, so that e.g. fragmented IP packets can |
| 672 | * be passed to the guest in one go later (instead of passing single |
| 673 | * fragments if there is only one receive buffer available). |
| 674 | */ |
| 675 | timer_mod(dev->rxp_timer, qemu_clock_get_us(QEMU_CLOCK_VIRTUAL) + 500); |
| 676 | |
| 677 | return H_SUCCESS; |
| 678 | } |
| 679 | |
| 680 | static target_ulong h_send_logical_lan(PowerPCCPU *cpu, |
| 681 | SpaprMachineState *spapr, |
| 682 | target_ulong opcode, target_ulong *args) |
| 683 | { |
| 684 | target_ulong reg = args[0]; |
| 685 | target_ulong *bufs = args + 1; |
| 686 | target_ulong continue_token = args[7]; |
| 687 | SpaprVioDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 688 | SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(sdev); |
| 689 | unsigned total_len; |
| 690 | uint8_t *p; |
| 691 | g_autofree uint8_t *lbuf = NULL; |
| 692 | int i, nbufs; |
| 693 | int ret; |
| 694 | |
| 695 | trace_spapr_vlan_h_send_logical_lan(reg, continue_token); |
| 696 | |
| 697 | if (!sdev) { |
| 698 | return H_PARAMETER; |
| 699 | } |
| 700 | |
| 701 | trace_spapr_vlan_h_send_logical_lan_rxbufs(dev->rx_bufs); |
| 702 | |
| 703 | if (!dev->isopen) { |
| 704 | return H_DROPPED; |
| 705 | } |
| 706 | |
| 707 | if (continue_token) { |
| 708 | return H_HARDWARE; /* FIXME actually handle this */ |
| 709 | } |
| 710 | |
| 711 | total_len = 0; |
| 712 | for (i = 0; i < 6; i++) { |
| 713 | trace_spapr_vlan_h_send_logical_lan_buf_desc(bufs[i]); |
| 714 | if (!(bufs[i] & VLAN_BD_VALID)) { |
| 715 | break; |
| 716 | } |
| 717 | total_len += VLAN_BD_LEN(bufs[i]); |
| 718 | } |
| 719 | |
| 720 | nbufs = i; |
| 721 | trace_spapr_vlan_h_send_logical_lan_total(nbufs, total_len); |
| 722 | |
| 723 | if (total_len == 0) { |
| 724 | return H_SUCCESS; |
| 725 | } |
| 726 | |
| 727 | if (total_len > MAX_PACKET_SIZE) { |
| 728 | /* Don't let the guest force too large an allocation */ |
| 729 | return H_RESOURCE; |
| 730 | } |
| 731 | |
| 732 | lbuf = g_malloc(total_len); |
| 733 | p = lbuf; |
| 734 | for (i = 0; i < nbufs; i++) { |
| 735 | ret = spapr_vio_dma_read(sdev, VLAN_BD_ADDR(bufs[i]), |
| 736 | p, VLAN_BD_LEN(bufs[i])); |
| 737 | if (ret < 0) { |
| 738 | return ret; |
| 739 | } |
| 740 | |
| 741 | p += VLAN_BD_LEN(bufs[i]); |
| 742 | } |
| 743 | |
| 744 | qemu_send_packet(qemu_get_queue(dev->nic), lbuf, total_len); |
| 745 | |
| 746 | return H_SUCCESS; |
| 747 | } |
| 748 | |
| 749 | static target_ulong h_multicast_ctrl(PowerPCCPU *cpu, SpaprMachineState *spapr, |
| 750 | target_ulong opcode, target_ulong *args) |
| 751 | { |
| 752 | target_ulong reg = args[0]; |
| 753 | SpaprVioDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 754 | |
| 755 | if (!dev) { |
| 756 | return H_PARAMETER; |
| 757 | } |
| 758 | |
| 759 | return H_SUCCESS; |
| 760 | } |
| 761 | |
| 762 | static target_ulong h_change_logical_lan_mac(PowerPCCPU *cpu, |
| 763 | SpaprMachineState *spapr, |
| 764 | target_ulong opcode, |
| 765 | target_ulong *args) |
| 766 | { |
| 767 | target_ulong reg = args[0]; |
| 768 | target_ulong macaddr = args[1]; |
| 769 | SpaprVioDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); |
| 770 | SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(sdev); |
| 771 | int i; |
| 772 | |
| 773 | if (!dev) { |
| 774 | hcall_dprintf("H_CHANGE_LOGICAL_LAN_MAC called when " |
| 775 | "no NIC is present\n"); |
| 776 | return H_PARAMETER; |
| 777 | } |
| 778 | |
| 779 | for (i = 0; i < ETH_ALEN; i++) { |
| 780 | dev->nicconf.macaddr.a[ETH_ALEN - i - 1] = macaddr & 0xff; |
| 781 | macaddr >>= 8; |
| 782 | } |
| 783 | |
| 784 | qemu_format_nic_info_str(qemu_get_queue(dev->nic), dev->nicconf.macaddr.a); |
| 785 | |
| 786 | return H_SUCCESS; |
| 787 | } |
| 788 | |
| 789 | static const Property spapr_vlan_properties[] = { |
| 790 | DEFINE_SPAPR_PROPERTIES(SpaprVioVlan, sdev), |
| 791 | DEFINE_NIC_PROPERTIES(SpaprVioVlan, nicconf), |
| 792 | DEFINE_PROP_BIT("use-rx-buffer-pools", SpaprVioVlan, |
| 793 | compat_flags, SPAPRVLAN_FLAG_RX_BUF_POOLS_BIT, true), |
| 794 | }; |
| 795 | |
| 796 | static bool spapr_vlan_rx_buffer_pools_needed(void *opaque) |
| 797 | { |
| 798 | SpaprVioVlan *dev = opaque; |
| 799 | |
| 800 | return (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) != 0; |
| 801 | } |
| 802 | |
| 803 | static const VMStateDescription vmstate_rx_buffer_pool = { |
| 804 | .name = "spapr_llan/rx_buffer_pool", |
| 805 | .version_id = 1, |
| 806 | .minimum_version_id = 1, |
| 807 | .needed = spapr_vlan_rx_buffer_pools_needed, |
| 808 | .fields = (const VMStateField[]) { |
| 809 | VMSTATE_INT32(bufsize, RxBufPool), |
| 810 | VMSTATE_INT32(count, RxBufPool), |
| 811 | VMSTATE_UINT64_ARRAY(bds, RxBufPool, RX_POOL_MAX_BDS), |
| 812 | VMSTATE_END_OF_LIST() |
| 813 | } |
| 814 | }; |
| 815 | |
| 816 | static const VMStateDescription vmstate_rx_pools = { |
| 817 | .name = "spapr_llan/rx_pools", |
| 818 | .version_id = 1, |
| 819 | .minimum_version_id = 1, |
| 820 | .needed = spapr_vlan_rx_buffer_pools_needed, |
| 821 | .fields = (const VMStateField[]) { |
| 822 | VMSTATE_ARRAY_OF_POINTER_TO_STRUCT(rx_pool, SpaprVioVlan, |
| 823 | RX_MAX_POOLS, 1, |
| 824 | vmstate_rx_buffer_pool, RxBufPool), |
| 825 | VMSTATE_END_OF_LIST() |
| 826 | } |
| 827 | }; |
| 828 | |
| 829 | static const VMStateDescription vmstate_spapr_llan = { |
| 830 | .name = "spapr_llan", |
| 831 | .version_id = 1, |
| 832 | .minimum_version_id = 1, |
| 833 | .fields = (const VMStateField[]) { |
| 834 | VMSTATE_SPAPR_VIO(sdev, SpaprVioVlan), |
| 835 | /* LLAN state */ |
| 836 | VMSTATE_BOOL(isopen, SpaprVioVlan), |
| 837 | VMSTATE_UINT64(buf_list, SpaprVioVlan), |
| 838 | VMSTATE_UINT32(add_buf_ptr, SpaprVioVlan), |
| 839 | VMSTATE_UINT32(use_buf_ptr, SpaprVioVlan), |
| 840 | VMSTATE_UINT32(rx_bufs, SpaprVioVlan), |
| 841 | VMSTATE_UINT64(rxq_ptr, SpaprVioVlan), |
| 842 | |
| 843 | VMSTATE_END_OF_LIST() |
| 844 | }, |
| 845 | .subsections = (const VMStateDescription * const []) { |
| 846 | &vmstate_rx_pools, |
| 847 | NULL |
| 848 | } |
| 849 | }; |
| 850 | |
| 851 | static void spapr_vlan_class_init(ObjectClass *klass, const void *data) |
| 852 | { |
| 853 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 854 | SpaprVioDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass); |
| 855 | |
| 856 | k->realize = spapr_vlan_realize; |
| 857 | k->reset = spapr_vlan_reset; |
| 858 | k->devnode = spapr_vlan_devnode; |
| 859 | k->dt_name = "l-lan"; |
| 860 | k->dt_type = "network"; |
| 861 | k->dt_compatible = "IBM,l-lan"; |
| 862 | k->signal_mask = 0x1; |
| 863 | set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); |
| 864 | device_class_set_props(dc, spapr_vlan_properties); |
| 865 | k->rtce_window_size = 0x10000000; |
| 866 | dc->vmsd = &vmstate_spapr_llan; |
| 867 | } |
| 868 | |
| 869 | static const TypeInfo spapr_vlan_info = { |
| 870 | .name = TYPE_VIO_SPAPR_VLAN_DEVICE, |
| 871 | .parent = TYPE_VIO_SPAPR_DEVICE, |
| 872 | .instance_size = sizeof(SpaprVioVlan), |
| 873 | .class_init = spapr_vlan_class_init, |
| 874 | .instance_init = spapr_vlan_instance_init, |
| 875 | .instance_finalize = spapr_vlan_instance_finalize, |
| 876 | }; |
| 877 | |
| 878 | static void spapr_vlan_register_types(void) |
| 879 | { |
| 880 | spapr_register_hypercall(H_REGISTER_LOGICAL_LAN, h_register_logical_lan); |
| 881 | spapr_register_hypercall(H_FREE_LOGICAL_LAN, h_free_logical_lan); |
| 882 | spapr_register_hypercall(H_SEND_LOGICAL_LAN, h_send_logical_lan); |
| 883 | spapr_register_hypercall(H_ADD_LOGICAL_LAN_BUFFER, |
| 884 | h_add_logical_lan_buffer); |
| 885 | spapr_register_hypercall(H_MULTICAST_CTRL, h_multicast_ctrl); |
| 886 | spapr_register_hypercall(H_CHANGE_LOGICAL_LAN_MAC, |
| 887 | h_change_logical_lan_mac); |
| 888 | type_register_static(&spapr_vlan_info); |
| 889 | } |
| 890 | |
| 891 | type_init(spapr_vlan_register_types) |