spapr_llan.c (27367B)
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/qdev-properties.h" 36 #include "sysemu/sysemu.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, dev); 329 qemu_format_nic_info_str(qemu_get_queue(dev->nic), dev->nicconf.macaddr.a); 330 331 dev->rxp_timer = timer_new_us(QEMU_CLOCK_VIRTUAL, spapr_vlan_flush_rx_queue, 332 dev); 333 } 334 335 static void spapr_vlan_instance_init(Object *obj) 336 { 337 SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(obj); 338 int i; 339 340 device_add_bootindex_property(obj, &dev->nicconf.bootindex, 341 "bootindex", "", 342 DEVICE(dev)); 343 344 if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) { 345 for (i = 0; i < RX_MAX_POOLS; i++) { 346 dev->rx_pool[i] = g_new(RxBufPool, 1); 347 spapr_vlan_reset_rx_pool(dev->rx_pool[i]); 348 } 349 } 350 } 351 352 static void spapr_vlan_instance_finalize(Object *obj) 353 { 354 SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(obj); 355 int i; 356 357 if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) { 358 for (i = 0; i < RX_MAX_POOLS; i++) { 359 g_free(dev->rx_pool[i]); 360 dev->rx_pool[i] = NULL; 361 } 362 } 363 364 if (dev->rxp_timer) { 365 timer_free(dev->rxp_timer); 366 } 367 } 368 369 void spapr_vlan_create(SpaprVioBus *bus, NICInfo *nd) 370 { 371 DeviceState *dev; 372 373 dev = qdev_new("spapr-vlan"); 374 375 qdev_set_nic_properties(dev, nd); 376 377 qdev_realize_and_unref(dev, &bus->bus, &error_fatal); 378 } 379 380 static int spapr_vlan_devnode(SpaprVioDevice *dev, void *fdt, int node_off) 381 { 382 SpaprVioVlan *vdev = VIO_SPAPR_VLAN_DEVICE(dev); 383 uint8_t padded_mac[8] = {0, 0}; 384 int ret; 385 386 /* Some old phyp versions give the mac address in an 8-byte 387 * property. The kernel driver (before 3.10) has an insane workaround; 388 * rather than doing the obvious thing and checking the property 389 * length, it checks whether the first byte has 0b10 in the low 390 * bits. If a correct 6-byte property has a different first byte 391 * the kernel will get the wrong mac address, overrunning its 392 * buffer in the process (read only, thank goodness). 393 * 394 * Here we return a 6-byte address unless that would break a pre-3.10 395 * driver. In that case we return a padded 8-byte address to allow the old 396 * workaround to succeed. */ 397 if ((vdev->nicconf.macaddr.a[0] & 0x3) == 0x2) { 398 ret = fdt_setprop(fdt, node_off, "local-mac-address", 399 &vdev->nicconf.macaddr, ETH_ALEN); 400 } else { 401 memcpy(&padded_mac[2], &vdev->nicconf.macaddr, ETH_ALEN); 402 ret = fdt_setprop(fdt, node_off, "local-mac-address", 403 padded_mac, sizeof(padded_mac)); 404 } 405 if (ret < 0) { 406 return ret; 407 } 408 409 ret = fdt_setprop_cell(fdt, node_off, "ibm,mac-address-filters", 0); 410 if (ret < 0) { 411 return ret; 412 } 413 414 return 0; 415 } 416 417 static int check_bd(SpaprVioVlan *dev, vlan_bd_t bd, 418 target_ulong alignment) 419 { 420 if ((VLAN_BD_ADDR(bd) % alignment) 421 || (VLAN_BD_LEN(bd) % alignment)) { 422 return -1; 423 } 424 425 if (!spapr_vio_dma_valid(&dev->sdev, VLAN_BD_ADDR(bd), 426 VLAN_BD_LEN(bd), DMA_DIRECTION_FROM_DEVICE) 427 || !spapr_vio_dma_valid(&dev->sdev, VLAN_BD_ADDR(bd), 428 VLAN_BD_LEN(bd), DMA_DIRECTION_TO_DEVICE)) { 429 return -1; 430 } 431 432 return 0; 433 } 434 435 static target_ulong h_register_logical_lan(PowerPCCPU *cpu, 436 SpaprMachineState *spapr, 437 target_ulong opcode, 438 target_ulong *args) 439 { 440 target_ulong reg = args[0]; 441 target_ulong buf_list = args[1]; 442 target_ulong rec_queue = args[2]; 443 target_ulong filter_list = args[3]; 444 SpaprVioDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); 445 SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(sdev); 446 vlan_bd_t filter_list_bd; 447 448 if (!dev) { 449 return H_PARAMETER; 450 } 451 452 if (dev->isopen) { 453 hcall_dprintf("H_REGISTER_LOGICAL_LAN called twice without " 454 "H_FREE_LOGICAL_LAN\n"); 455 return H_RESOURCE; 456 } 457 458 if (check_bd(dev, VLAN_VALID_BD(buf_list, SPAPR_TCE_PAGE_SIZE), 459 SPAPR_TCE_PAGE_SIZE) < 0) { 460 hcall_dprintf("Bad buf_list 0x" TARGET_FMT_lx "\n", buf_list); 461 return H_PARAMETER; 462 } 463 464 filter_list_bd = VLAN_VALID_BD(filter_list, SPAPR_TCE_PAGE_SIZE); 465 if (check_bd(dev, filter_list_bd, SPAPR_TCE_PAGE_SIZE) < 0) { 466 hcall_dprintf("Bad filter_list 0x" TARGET_FMT_lx "\n", filter_list); 467 return H_PARAMETER; 468 } 469 470 if (!(rec_queue & VLAN_BD_VALID) 471 || (check_bd(dev, rec_queue, VLAN_RQ_ALIGNMENT) < 0)) { 472 hcall_dprintf("Bad receive queue\n"); 473 return H_PARAMETER; 474 } 475 476 dev->buf_list = buf_list; 477 sdev->signal_state = 0; 478 479 rec_queue &= ~VLAN_BD_TOGGLE; 480 481 /* Initialize the buffer list */ 482 vio_stq(sdev, buf_list, rec_queue); 483 vio_stq(sdev, buf_list + 8, filter_list_bd); 484 spapr_vio_dma_set(sdev, buf_list + VLAN_RX_BDS_OFF, 0, 485 SPAPR_TCE_PAGE_SIZE - VLAN_RX_BDS_OFF); 486 dev->add_buf_ptr = VLAN_RX_BDS_OFF - 8; 487 dev->use_buf_ptr = VLAN_RX_BDS_OFF - 8; 488 dev->rx_bufs = 0; 489 dev->rxq_ptr = 0; 490 491 /* Initialize the receive queue */ 492 spapr_vio_dma_set(sdev, VLAN_BD_ADDR(rec_queue), 0, VLAN_BD_LEN(rec_queue)); 493 494 dev->isopen = 1; 495 qemu_flush_queued_packets(qemu_get_queue(dev->nic)); 496 497 return H_SUCCESS; 498 } 499 500 501 static target_ulong h_free_logical_lan(PowerPCCPU *cpu, 502 SpaprMachineState *spapr, 503 target_ulong opcode, target_ulong *args) 504 { 505 target_ulong reg = args[0]; 506 SpaprVioDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); 507 SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(sdev); 508 509 if (!dev) { 510 return H_PARAMETER; 511 } 512 513 if (!dev->isopen) { 514 hcall_dprintf("H_FREE_LOGICAL_LAN called without " 515 "H_REGISTER_LOGICAL_LAN\n"); 516 return H_RESOURCE; 517 } 518 519 spapr_vlan_reset(sdev); 520 return H_SUCCESS; 521 } 522 523 /** 524 * Used for qsort, this function compares two RxBufPools by size. 525 */ 526 static int rx_pool_size_compare(const void *p1, const void *p2) 527 { 528 const RxBufPool *pool1 = *(RxBufPool **)p1; 529 const RxBufPool *pool2 = *(RxBufPool **)p2; 530 531 if (pool1->bufsize < pool2->bufsize) { 532 return -1; 533 } 534 return pool1->bufsize > pool2->bufsize; 535 } 536 537 /** 538 * Search for a matching buffer pool with exact matching size, 539 * or return -1 if no matching pool has been found. 540 */ 541 static int spapr_vlan_get_rx_pool_id(SpaprVioVlan *dev, int size) 542 { 543 int pool; 544 545 for (pool = 0; pool < RX_MAX_POOLS; pool++) { 546 if (dev->rx_pool[pool]->bufsize == size) { 547 return pool; 548 } 549 } 550 551 return -1; 552 } 553 554 /** 555 * Enqueuing receive buffer by adding it to one of our receive buffer pools 556 */ 557 static target_long spapr_vlan_add_rxbuf_to_pool(SpaprVioVlan *dev, 558 target_ulong buf) 559 { 560 int size = VLAN_BD_LEN(buf); 561 int pool; 562 563 pool = spapr_vlan_get_rx_pool_id(dev, size); 564 if (pool < 0) { 565 /* 566 * No matching pool found? Try to use a new one. If the guest used all 567 * pools before, but changed the size of one pool in the meantime, we might 568 * need to recycle that pool here (if it's empty already). Thus scan 569 * all buffer pools now, starting with the last (likely empty) one. 570 */ 571 for (pool = RX_MAX_POOLS - 1; pool >= 0 ; pool--) { 572 if (dev->rx_pool[pool]->count == 0) { 573 dev->rx_pool[pool]->bufsize = size; 574 /* 575 * Sort pools by size so that spapr_vlan_receive() 576 * can later find the smallest buffer pool easily. 577 */ 578 qsort(dev->rx_pool, RX_MAX_POOLS, sizeof(dev->rx_pool[0]), 579 rx_pool_size_compare); 580 pool = spapr_vlan_get_rx_pool_id(dev, size); 581 trace_spapr_vlan_add_rxbuf_to_pool_create(pool, 582 VLAN_BD_LEN(buf)); 583 break; 584 } 585 } 586 } 587 /* Still no usable pool? Give up */ 588 if (pool < 0 || dev->rx_pool[pool]->count >= RX_POOL_MAX_BDS) { 589 return H_RESOURCE; 590 } 591 592 trace_spapr_vlan_add_rxbuf_to_pool(pool, VLAN_BD_LEN(buf), 593 dev->rx_pool[pool]->count); 594 595 dev->rx_pool[pool]->bds[dev->rx_pool[pool]->count++] = buf; 596 597 return 0; 598 } 599 600 /** 601 * This is the old way of enqueuing receive buffers: Add it to the rx queue 602 * page that has been supplied by the guest (which is quite limited in size). 603 */ 604 static target_long spapr_vlan_add_rxbuf_to_page(SpaprVioVlan *dev, 605 target_ulong buf) 606 { 607 vlan_bd_t bd; 608 609 if (dev->rx_bufs >= VLAN_MAX_BUFS) { 610 return H_RESOURCE; 611 } 612 613 do { 614 dev->add_buf_ptr += 8; 615 if (dev->add_buf_ptr >= VLAN_RX_BDS_LEN + VLAN_RX_BDS_OFF) { 616 dev->add_buf_ptr = VLAN_RX_BDS_OFF; 617 } 618 619 bd = vio_ldq(&dev->sdev, dev->buf_list + dev->add_buf_ptr); 620 } while (bd & VLAN_BD_VALID); 621 622 vio_stq(&dev->sdev, dev->buf_list + dev->add_buf_ptr, buf); 623 624 trace_spapr_vlan_add_rxbuf_to_page(dev->add_buf_ptr, dev->rx_bufs, buf); 625 626 return 0; 627 } 628 629 static target_ulong h_add_logical_lan_buffer(PowerPCCPU *cpu, 630 SpaprMachineState *spapr, 631 target_ulong opcode, 632 target_ulong *args) 633 { 634 target_ulong reg = args[0]; 635 target_ulong buf = args[1]; 636 SpaprVioDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); 637 SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(sdev); 638 target_long ret; 639 640 trace_spapr_vlan_h_add_logical_lan_buffer(reg, buf); 641 642 if (!sdev) { 643 hcall_dprintf("Bad device\n"); 644 return H_PARAMETER; 645 } 646 647 if ((check_bd(dev, buf, 4) < 0) 648 || (VLAN_BD_LEN(buf) < 16)) { 649 hcall_dprintf("Bad buffer enqueued\n"); 650 return H_PARAMETER; 651 } 652 653 if (!dev->isopen) { 654 return H_RESOURCE; 655 } 656 657 if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) { 658 ret = spapr_vlan_add_rxbuf_to_pool(dev, buf); 659 } else { 660 ret = spapr_vlan_add_rxbuf_to_page(dev, buf); 661 } 662 if (ret) { 663 return ret; 664 } 665 666 dev->rx_bufs++; 667 668 /* 669 * Give guest some more time to add additional RX buffers before we 670 * flush the receive queue, so that e.g. fragmented IP packets can 671 * be passed to the guest in one go later (instead of passing single 672 * fragments if there is only one receive buffer available). 673 */ 674 timer_mod(dev->rxp_timer, qemu_clock_get_us(QEMU_CLOCK_VIRTUAL) + 500); 675 676 return H_SUCCESS; 677 } 678 679 static target_ulong h_send_logical_lan(PowerPCCPU *cpu, 680 SpaprMachineState *spapr, 681 target_ulong opcode, target_ulong *args) 682 { 683 target_ulong reg = args[0]; 684 target_ulong *bufs = args + 1; 685 target_ulong continue_token = args[7]; 686 SpaprVioDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); 687 SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(sdev); 688 unsigned total_len; 689 uint8_t *p; 690 g_autofree uint8_t *lbuf = NULL; 691 int i, nbufs; 692 int ret; 693 694 trace_spapr_vlan_h_send_logical_lan(reg, continue_token); 695 696 if (!sdev) { 697 return H_PARAMETER; 698 } 699 700 trace_spapr_vlan_h_send_logical_lan_rxbufs(dev->rx_bufs); 701 702 if (!dev->isopen) { 703 return H_DROPPED; 704 } 705 706 if (continue_token) { 707 return H_HARDWARE; /* FIXME actually handle this */ 708 } 709 710 total_len = 0; 711 for (i = 0; i < 6; i++) { 712 trace_spapr_vlan_h_send_logical_lan_buf_desc(bufs[i]); 713 if (!(bufs[i] & VLAN_BD_VALID)) { 714 break; 715 } 716 total_len += VLAN_BD_LEN(bufs[i]); 717 } 718 719 nbufs = i; 720 trace_spapr_vlan_h_send_logical_lan_total(nbufs, total_len); 721 722 if (total_len == 0) { 723 return H_SUCCESS; 724 } 725 726 if (total_len > MAX_PACKET_SIZE) { 727 /* Don't let the guest force too large an allocation */ 728 return H_RESOURCE; 729 } 730 731 lbuf = g_malloc(total_len); 732 p = lbuf; 733 for (i = 0; i < nbufs; i++) { 734 ret = spapr_vio_dma_read(sdev, VLAN_BD_ADDR(bufs[i]), 735 p, VLAN_BD_LEN(bufs[i])); 736 if (ret < 0) { 737 return ret; 738 } 739 740 p += VLAN_BD_LEN(bufs[i]); 741 } 742 743 qemu_send_packet(qemu_get_queue(dev->nic), lbuf, total_len); 744 745 return H_SUCCESS; 746 } 747 748 static target_ulong h_multicast_ctrl(PowerPCCPU *cpu, SpaprMachineState *spapr, 749 target_ulong opcode, target_ulong *args) 750 { 751 target_ulong reg = args[0]; 752 SpaprVioDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); 753 754 if (!dev) { 755 return H_PARAMETER; 756 } 757 758 return H_SUCCESS; 759 } 760 761 static target_ulong h_change_logical_lan_mac(PowerPCCPU *cpu, 762 SpaprMachineState *spapr, 763 target_ulong opcode, 764 target_ulong *args) 765 { 766 target_ulong reg = args[0]; 767 target_ulong macaddr = args[1]; 768 SpaprVioDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); 769 SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(sdev); 770 int i; 771 772 for (i = 0; i < ETH_ALEN; i++) { 773 dev->nicconf.macaddr.a[ETH_ALEN - i - 1] = macaddr & 0xff; 774 macaddr >>= 8; 775 } 776 777 qemu_format_nic_info_str(qemu_get_queue(dev->nic), dev->nicconf.macaddr.a); 778 779 return H_SUCCESS; 780 } 781 782 static Property spapr_vlan_properties[] = { 783 DEFINE_SPAPR_PROPERTIES(SpaprVioVlan, sdev), 784 DEFINE_NIC_PROPERTIES(SpaprVioVlan, nicconf), 785 DEFINE_PROP_BIT("use-rx-buffer-pools", SpaprVioVlan, 786 compat_flags, SPAPRVLAN_FLAG_RX_BUF_POOLS_BIT, true), 787 DEFINE_PROP_END_OF_LIST(), 788 }; 789 790 static bool spapr_vlan_rx_buffer_pools_needed(void *opaque) 791 { 792 SpaprVioVlan *dev = opaque; 793 794 return (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) != 0; 795 } 796 797 static const VMStateDescription vmstate_rx_buffer_pool = { 798 .name = "spapr_llan/rx_buffer_pool", 799 .version_id = 1, 800 .minimum_version_id = 1, 801 .needed = spapr_vlan_rx_buffer_pools_needed, 802 .fields = (VMStateField[]) { 803 VMSTATE_INT32(bufsize, RxBufPool), 804 VMSTATE_INT32(count, RxBufPool), 805 VMSTATE_UINT64_ARRAY(bds, RxBufPool, RX_POOL_MAX_BDS), 806 VMSTATE_END_OF_LIST() 807 } 808 }; 809 810 static const VMStateDescription vmstate_rx_pools = { 811 .name = "spapr_llan/rx_pools", 812 .version_id = 1, 813 .minimum_version_id = 1, 814 .needed = spapr_vlan_rx_buffer_pools_needed, 815 .fields = (VMStateField[]) { 816 VMSTATE_ARRAY_OF_POINTER_TO_STRUCT(rx_pool, SpaprVioVlan, 817 RX_MAX_POOLS, 1, 818 vmstate_rx_buffer_pool, RxBufPool), 819 VMSTATE_END_OF_LIST() 820 } 821 }; 822 823 static const VMStateDescription vmstate_spapr_llan = { 824 .name = "spapr_llan", 825 .version_id = 1, 826 .minimum_version_id = 1, 827 .fields = (VMStateField[]) { 828 VMSTATE_SPAPR_VIO(sdev, SpaprVioVlan), 829 /* LLAN state */ 830 VMSTATE_BOOL(isopen, SpaprVioVlan), 831 VMSTATE_UINT64(buf_list, SpaprVioVlan), 832 VMSTATE_UINT32(add_buf_ptr, SpaprVioVlan), 833 VMSTATE_UINT32(use_buf_ptr, SpaprVioVlan), 834 VMSTATE_UINT32(rx_bufs, SpaprVioVlan), 835 VMSTATE_UINT64(rxq_ptr, SpaprVioVlan), 836 837 VMSTATE_END_OF_LIST() 838 }, 839 .subsections = (const VMStateDescription * []) { 840 &vmstate_rx_pools, 841 NULL 842 } 843 }; 844 845 static void spapr_vlan_class_init(ObjectClass *klass, void *data) 846 { 847 DeviceClass *dc = DEVICE_CLASS(klass); 848 SpaprVioDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass); 849 850 k->realize = spapr_vlan_realize; 851 k->reset = spapr_vlan_reset; 852 k->devnode = spapr_vlan_devnode; 853 k->dt_name = "l-lan"; 854 k->dt_type = "network"; 855 k->dt_compatible = "IBM,l-lan"; 856 k->signal_mask = 0x1; 857 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 858 device_class_set_props(dc, spapr_vlan_properties); 859 k->rtce_window_size = 0x10000000; 860 dc->vmsd = &vmstate_spapr_llan; 861 } 862 863 static const TypeInfo spapr_vlan_info = { 864 .name = TYPE_VIO_SPAPR_VLAN_DEVICE, 865 .parent = TYPE_VIO_SPAPR_DEVICE, 866 .instance_size = sizeof(SpaprVioVlan), 867 .class_init = spapr_vlan_class_init, 868 .instance_init = spapr_vlan_instance_init, 869 .instance_finalize = spapr_vlan_instance_finalize, 870 }; 871 872 static void spapr_vlan_register_types(void) 873 { 874 spapr_register_hypercall(H_REGISTER_LOGICAL_LAN, h_register_logical_lan); 875 spapr_register_hypercall(H_FREE_LOGICAL_LAN, h_free_logical_lan); 876 spapr_register_hypercall(H_SEND_LOGICAL_LAN, h_send_logical_lan); 877 spapr_register_hypercall(H_ADD_LOGICAL_LAN_BUFFER, 878 h_add_logical_lan_buffer); 879 spapr_register_hypercall(H_MULTICAST_CTRL, h_multicast_ctrl); 880 spapr_register_hypercall(H_CHANGE_LOGICAL_LAN_MAC, 881 h_change_logical_lan_mac); 882 type_register_static(&spapr_vlan_info); 883 } 884 885 type_init(spapr_vlan_register_types)