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 #include "qemu/osdep.h" 28 #include "qemu-common.h" 29 #include "cpu.h" 30 #include "hw/hw.h" 31 #include "qemu/log.h" 32 #include "net/net.h" 33 #include "hw/qdev.h" 34 #include "hw/ppc/spapr.h" 35 #include "hw/ppc/spapr_vio.h" 36 #include "sysemu/sysemu.h" 37 38 #include <libfdt.h> 39 40 #define ETH_ALEN 6 41 #define MAX_PACKET_SIZE 65536 42 43 /*#define DEBUG*/ 44 45 #ifdef DEBUG 46 #define DPRINTF(fmt...) do { fprintf(stderr, fmt); } while (0) 47 #else 48 #define DPRINTF(fmt...) 49 #endif 50 51 /* Compatibility flags for migration */ 52 #define SPAPRVLAN_FLAG_RX_BUF_POOLS_BIT 0 53 #define SPAPRVLAN_FLAG_RX_BUF_POOLS (1 << SPAPRVLAN_FLAG_RX_BUF_POOLS_BIT) 54 55 /* 56 * Virtual LAN device 57 */ 58 59 typedef uint64_t vlan_bd_t; 60 61 #define VLAN_BD_VALID 0x8000000000000000ULL 62 #define VLAN_BD_TOGGLE 0x4000000000000000ULL 63 #define VLAN_BD_NO_CSUM 0x0200000000000000ULL 64 #define VLAN_BD_CSUM_GOOD 0x0100000000000000ULL 65 #define VLAN_BD_LEN_MASK 0x00ffffff00000000ULL 66 #define VLAN_BD_LEN(bd) (((bd) & VLAN_BD_LEN_MASK) >> 32) 67 #define VLAN_BD_ADDR_MASK 0x00000000ffffffffULL 68 #define VLAN_BD_ADDR(bd) ((bd) & VLAN_BD_ADDR_MASK) 69 70 #define VLAN_VALID_BD(addr, len) (VLAN_BD_VALID | \ 71 (((len) << 32) & VLAN_BD_LEN_MASK) | \ 72 (addr & VLAN_BD_ADDR_MASK)) 73 74 #define VLAN_RXQC_TOGGLE 0x80 75 #define VLAN_RXQC_VALID 0x40 76 #define VLAN_RXQC_NO_CSUM 0x02 77 #define VLAN_RXQC_CSUM_GOOD 0x01 78 79 #define VLAN_RQ_ALIGNMENT 16 80 #define VLAN_RXQ_BD_OFF 0 81 #define VLAN_FILTER_BD_OFF 8 82 #define VLAN_RX_BDS_OFF 16 83 /* 84 * The final 8 bytes of the buffer list is a counter of frames dropped 85 * because there was not a buffer in the buffer list capable of holding 86 * the frame. We must avoid it, or the operating system will report garbage 87 * for this statistic. 88 */ 89 #define VLAN_RX_BDS_LEN (SPAPR_TCE_PAGE_SIZE - VLAN_RX_BDS_OFF - 8) 90 #define VLAN_MAX_BUFS (VLAN_RX_BDS_LEN / 8) 91 92 #define TYPE_VIO_SPAPR_VLAN_DEVICE "spapr-vlan" 93 #define VIO_SPAPR_VLAN_DEVICE(obj) \ 94 OBJECT_CHECK(VIOsPAPRVLANDevice, (obj), TYPE_VIO_SPAPR_VLAN_DEVICE) 95 96 #define RX_POOL_MAX_BDS 4096 97 #define RX_MAX_POOLS 5 98 99 typedef struct { 100 int32_t bufsize; 101 int32_t count; 102 vlan_bd_t bds[RX_POOL_MAX_BDS]; 103 } RxBufPool; 104 105 typedef struct VIOsPAPRVLANDevice { 106 VIOsPAPRDevice sdev; 107 NICConf nicconf; 108 NICState *nic; 109 bool isopen; 110 hwaddr buf_list; 111 uint32_t add_buf_ptr, use_buf_ptr, rx_bufs; 112 hwaddr rxq_ptr; 113 QEMUTimer *rxp_timer; 114 uint32_t compat_flags; /* Compatability flags for migration */ 115 RxBufPool *rx_pool[RX_MAX_POOLS]; /* Receive buffer descriptor pools */ 116 } VIOsPAPRVLANDevice; 117 118 static int spapr_vlan_can_receive(NetClientState *nc) 119 { 120 VIOsPAPRVLANDevice *dev = qemu_get_nic_opaque(nc); 121 122 return (dev->isopen && dev->rx_bufs > 0); 123 } 124 125 /** 126 * The last 8 bytes of the receive buffer list page (that has been 127 * supplied by the guest with the H_REGISTER_LOGICAL_LAN call) contain 128 * a counter for frames that have been dropped because there was no 129 * suitable receive buffer available. This function is used to increase 130 * this counter by one. 131 */ 132 static void spapr_vlan_record_dropped_rx_frame(VIOsPAPRVLANDevice *dev) 133 { 134 uint64_t cnt; 135 136 cnt = vio_ldq(&dev->sdev, dev->buf_list + 4096 - 8); 137 vio_stq(&dev->sdev, dev->buf_list + 4096 - 8, cnt + 1); 138 } 139 140 /** 141 * Get buffer descriptor from one of our receive buffer pools 142 */ 143 static vlan_bd_t spapr_vlan_get_rx_bd_from_pool(VIOsPAPRVLANDevice *dev, 144 size_t size) 145 { 146 vlan_bd_t bd; 147 int pool; 148 149 for (pool = 0; pool < RX_MAX_POOLS; pool++) { 150 if (dev->rx_pool[pool]->count > 0 && 151 dev->rx_pool[pool]->bufsize >= size + 8) { 152 break; 153 } 154 } 155 if (pool == RX_MAX_POOLS) { 156 /* Failed to find a suitable buffer */ 157 return 0; 158 } 159 160 DPRINTF("Found buffer: pool=%d count=%d rxbufs=%d\n", pool, 161 dev->rx_pool[pool]->count, dev->rx_bufs); 162 163 /* Remove the buffer from the pool */ 164 dev->rx_pool[pool]->count--; 165 bd = dev->rx_pool[pool]->bds[dev->rx_pool[pool]->count]; 166 dev->rx_pool[pool]->bds[dev->rx_pool[pool]->count] = 0; 167 168 return bd; 169 } 170 171 /** 172 * Get buffer descriptor from the receive buffer list page that has been 173 * supplied by the guest with the H_REGISTER_LOGICAL_LAN call 174 */ 175 static vlan_bd_t spapr_vlan_get_rx_bd_from_page(VIOsPAPRVLANDevice *dev, 176 size_t size) 177 { 178 int buf_ptr = dev->use_buf_ptr; 179 vlan_bd_t bd; 180 181 do { 182 buf_ptr += 8; 183 if (buf_ptr >= VLAN_RX_BDS_LEN + VLAN_RX_BDS_OFF) { 184 buf_ptr = VLAN_RX_BDS_OFF; 185 } 186 187 bd = vio_ldq(&dev->sdev, dev->buf_list + buf_ptr); 188 DPRINTF("use_buf_ptr=%d bd=0x%016llx\n", 189 buf_ptr, (unsigned long long)bd); 190 } while ((!(bd & VLAN_BD_VALID) || VLAN_BD_LEN(bd) < size + 8) 191 && buf_ptr != dev->use_buf_ptr); 192 193 if (!(bd & VLAN_BD_VALID) || VLAN_BD_LEN(bd) < size + 8) { 194 /* Failed to find a suitable buffer */ 195 return 0; 196 } 197 198 /* Remove the buffer from the pool */ 199 dev->use_buf_ptr = buf_ptr; 200 vio_stq(&dev->sdev, dev->buf_list + dev->use_buf_ptr, 0); 201 202 DPRINTF("Found buffer: ptr=%d rxbufs=%d\n", dev->use_buf_ptr, dev->rx_bufs); 203 204 return bd; 205 } 206 207 static ssize_t spapr_vlan_receive(NetClientState *nc, const uint8_t *buf, 208 size_t size) 209 { 210 VIOsPAPRVLANDevice *dev = qemu_get_nic_opaque(nc); 211 VIOsPAPRDevice *sdev = VIO_SPAPR_DEVICE(dev); 212 vlan_bd_t rxq_bd = vio_ldq(sdev, dev->buf_list + VLAN_RXQ_BD_OFF); 213 vlan_bd_t bd; 214 uint64_t handle; 215 uint8_t control; 216 217 DPRINTF("spapr_vlan_receive() [%s] rx_bufs=%d\n", sdev->qdev.id, 218 dev->rx_bufs); 219 220 if (!dev->isopen) { 221 return -1; 222 } 223 224 if (!dev->rx_bufs) { 225 spapr_vlan_record_dropped_rx_frame(dev); 226 return 0; 227 } 228 229 if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) { 230 bd = spapr_vlan_get_rx_bd_from_pool(dev, size); 231 } else { 232 bd = spapr_vlan_get_rx_bd_from_page(dev, size); 233 } 234 if (!bd) { 235 spapr_vlan_record_dropped_rx_frame(dev); 236 return 0; 237 } 238 239 dev->rx_bufs--; 240 241 /* Transfer the packet data */ 242 if (spapr_vio_dma_write(sdev, VLAN_BD_ADDR(bd) + 8, buf, size) < 0) { 243 return -1; 244 } 245 246 DPRINTF("spapr_vlan_receive: DMA write completed\n"); 247 248 /* Update the receive queue */ 249 control = VLAN_RXQC_TOGGLE | VLAN_RXQC_VALID; 250 if (rxq_bd & VLAN_BD_TOGGLE) { 251 control ^= VLAN_RXQC_TOGGLE; 252 } 253 254 handle = vio_ldq(sdev, VLAN_BD_ADDR(bd)); 255 vio_stq(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr + 8, handle); 256 vio_stl(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr + 4, size); 257 vio_sth(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr + 2, 8); 258 vio_stb(sdev, VLAN_BD_ADDR(rxq_bd) + dev->rxq_ptr, control); 259 260 DPRINTF("wrote rxq entry (ptr=0x%llx): 0x%016llx 0x%016llx\n", 261 (unsigned long long)dev->rxq_ptr, 262 (unsigned long long)vio_ldq(sdev, VLAN_BD_ADDR(rxq_bd) + 263 dev->rxq_ptr), 264 (unsigned long long)vio_ldq(sdev, VLAN_BD_ADDR(rxq_bd) + 265 dev->rxq_ptr + 8)); 266 267 dev->rxq_ptr += 16; 268 if (dev->rxq_ptr >= VLAN_BD_LEN(rxq_bd)) { 269 dev->rxq_ptr = 0; 270 vio_stq(sdev, dev->buf_list + VLAN_RXQ_BD_OFF, rxq_bd ^ VLAN_BD_TOGGLE); 271 } 272 273 if (sdev->signal_state & 1) { 274 qemu_irq_pulse(spapr_vio_qirq(sdev)); 275 } 276 277 return size; 278 } 279 280 static NetClientInfo net_spapr_vlan_info = { 281 .type = NET_CLIENT_DRIVER_NIC, 282 .size = sizeof(NICState), 283 .can_receive = spapr_vlan_can_receive, 284 .receive = spapr_vlan_receive, 285 }; 286 287 static void spapr_vlan_flush_rx_queue(void *opaque) 288 { 289 VIOsPAPRVLANDevice *dev = opaque; 290 291 qemu_flush_queued_packets(qemu_get_queue(dev->nic)); 292 } 293 294 static void spapr_vlan_reset_rx_pool(RxBufPool *rxp) 295 { 296 /* 297 * Use INT_MAX as bufsize so that unused buffers are moved to the end 298 * of the list during the qsort in spapr_vlan_add_rxbuf_to_pool() later. 299 */ 300 rxp->bufsize = INT_MAX; 301 rxp->count = 0; 302 memset(rxp->bds, 0, sizeof(rxp->bds)); 303 } 304 305 static void spapr_vlan_reset(VIOsPAPRDevice *sdev) 306 { 307 VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(sdev); 308 int i; 309 310 dev->buf_list = 0; 311 dev->rx_bufs = 0; 312 dev->isopen = 0; 313 314 if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) { 315 for (i = 0; i < RX_MAX_POOLS; i++) { 316 spapr_vlan_reset_rx_pool(dev->rx_pool[i]); 317 } 318 } 319 } 320 321 static void spapr_vlan_realize(VIOsPAPRDevice *sdev, Error **errp) 322 { 323 VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(sdev); 324 325 qemu_macaddr_default_if_unset(&dev->nicconf.macaddr); 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 VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(obj); 338 int i; 339 340 device_add_bootindex_property(obj, &dev->nicconf.bootindex, 341 "bootindex", "", 342 DEVICE(dev), NULL); 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 VIOsPAPRVLANDevice *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_del(dev->rxp_timer); 366 timer_free(dev->rxp_timer); 367 } 368 } 369 370 void spapr_vlan_create(VIOsPAPRBus *bus, NICInfo *nd) 371 { 372 DeviceState *dev; 373 374 dev = qdev_create(&bus->bus, "spapr-vlan"); 375 376 qdev_set_nic_properties(dev, nd); 377 378 qdev_init_nofail(dev); 379 } 380 381 static int spapr_vlan_devnode(VIOsPAPRDevice *dev, void *fdt, int node_off) 382 { 383 VIOsPAPRVLANDevice *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 has an insane workaround for this; 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 workaround the kernel workaround by always supplying an 396 * 8-byte property, with the mac address in the last six bytes */ 397 memcpy(&padded_mac[2], &vdev->nicconf.macaddr, ETH_ALEN); 398 ret = fdt_setprop(fdt, node_off, "local-mac-address", 399 padded_mac, sizeof(padded_mac)); 400 if (ret < 0) { 401 return ret; 402 } 403 404 ret = fdt_setprop_cell(fdt, node_off, "ibm,mac-address-filters", 0); 405 if (ret < 0) { 406 return ret; 407 } 408 409 return 0; 410 } 411 412 static int check_bd(VIOsPAPRVLANDevice *dev, vlan_bd_t bd, 413 target_ulong alignment) 414 { 415 if ((VLAN_BD_ADDR(bd) % alignment) 416 || (VLAN_BD_LEN(bd) % alignment)) { 417 return -1; 418 } 419 420 if (!spapr_vio_dma_valid(&dev->sdev, VLAN_BD_ADDR(bd), 421 VLAN_BD_LEN(bd), DMA_DIRECTION_FROM_DEVICE) 422 || !spapr_vio_dma_valid(&dev->sdev, VLAN_BD_ADDR(bd), 423 VLAN_BD_LEN(bd), DMA_DIRECTION_TO_DEVICE)) { 424 return -1; 425 } 426 427 return 0; 428 } 429 430 static target_ulong h_register_logical_lan(PowerPCCPU *cpu, 431 sPAPRMachineState *spapr, 432 target_ulong opcode, 433 target_ulong *args) 434 { 435 target_ulong reg = args[0]; 436 target_ulong buf_list = args[1]; 437 target_ulong rec_queue = args[2]; 438 target_ulong filter_list = args[3]; 439 VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); 440 VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(sdev); 441 vlan_bd_t filter_list_bd; 442 443 if (!dev) { 444 return H_PARAMETER; 445 } 446 447 if (dev->isopen) { 448 hcall_dprintf("H_REGISTER_LOGICAL_LAN called twice without " 449 "H_FREE_LOGICAL_LAN\n"); 450 return H_RESOURCE; 451 } 452 453 if (check_bd(dev, VLAN_VALID_BD(buf_list, SPAPR_TCE_PAGE_SIZE), 454 SPAPR_TCE_PAGE_SIZE) < 0) { 455 hcall_dprintf("Bad buf_list 0x" TARGET_FMT_lx "\n", buf_list); 456 return H_PARAMETER; 457 } 458 459 filter_list_bd = VLAN_VALID_BD(filter_list, SPAPR_TCE_PAGE_SIZE); 460 if (check_bd(dev, filter_list_bd, SPAPR_TCE_PAGE_SIZE) < 0) { 461 hcall_dprintf("Bad filter_list 0x" TARGET_FMT_lx "\n", filter_list); 462 return H_PARAMETER; 463 } 464 465 if (!(rec_queue & VLAN_BD_VALID) 466 || (check_bd(dev, rec_queue, VLAN_RQ_ALIGNMENT) < 0)) { 467 hcall_dprintf("Bad receive queue\n"); 468 return H_PARAMETER; 469 } 470 471 dev->buf_list = buf_list; 472 sdev->signal_state = 0; 473 474 rec_queue &= ~VLAN_BD_TOGGLE; 475 476 /* Initialize the buffer list */ 477 vio_stq(sdev, buf_list, rec_queue); 478 vio_stq(sdev, buf_list + 8, filter_list_bd); 479 spapr_vio_dma_set(sdev, buf_list + VLAN_RX_BDS_OFF, 0, 480 SPAPR_TCE_PAGE_SIZE - VLAN_RX_BDS_OFF); 481 dev->add_buf_ptr = VLAN_RX_BDS_OFF - 8; 482 dev->use_buf_ptr = VLAN_RX_BDS_OFF - 8; 483 dev->rx_bufs = 0; 484 dev->rxq_ptr = 0; 485 486 /* Initialize the receive queue */ 487 spapr_vio_dma_set(sdev, VLAN_BD_ADDR(rec_queue), 0, VLAN_BD_LEN(rec_queue)); 488 489 dev->isopen = 1; 490 qemu_flush_queued_packets(qemu_get_queue(dev->nic)); 491 492 return H_SUCCESS; 493 } 494 495 496 static target_ulong h_free_logical_lan(PowerPCCPU *cpu, 497 sPAPRMachineState *spapr, 498 target_ulong opcode, target_ulong *args) 499 { 500 target_ulong reg = args[0]; 501 VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); 502 VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(sdev); 503 504 if (!dev) { 505 return H_PARAMETER; 506 } 507 508 if (!dev->isopen) { 509 hcall_dprintf("H_FREE_LOGICAL_LAN called without " 510 "H_REGISTER_LOGICAL_LAN\n"); 511 return H_RESOURCE; 512 } 513 514 spapr_vlan_reset(sdev); 515 return H_SUCCESS; 516 } 517 518 /** 519 * Used for qsort, this function compares two RxBufPools by size. 520 */ 521 static int rx_pool_size_compare(const void *p1, const void *p2) 522 { 523 const RxBufPool *pool1 = *(RxBufPool **)p1; 524 const RxBufPool *pool2 = *(RxBufPool **)p2; 525 526 if (pool1->bufsize < pool2->bufsize) { 527 return -1; 528 } 529 return pool1->bufsize > pool2->bufsize; 530 } 531 532 /** 533 * Search for a matching buffer pool with exact matching size, 534 * or return -1 if no matching pool has been found. 535 */ 536 static int spapr_vlan_get_rx_pool_id(VIOsPAPRVLANDevice *dev, int size) 537 { 538 int pool; 539 540 for (pool = 0; pool < RX_MAX_POOLS; pool++) { 541 if (dev->rx_pool[pool]->bufsize == size) { 542 return pool; 543 } 544 } 545 546 return -1; 547 } 548 549 /** 550 * Enqueuing receive buffer by adding it to one of our receive buffer pools 551 */ 552 static target_long spapr_vlan_add_rxbuf_to_pool(VIOsPAPRVLANDevice *dev, 553 target_ulong buf) 554 { 555 int size = VLAN_BD_LEN(buf); 556 int pool; 557 558 pool = spapr_vlan_get_rx_pool_id(dev, size); 559 if (pool < 0) { 560 /* 561 * No matching pool found? Try to use a new one. If the guest used all 562 * pools before, but changed the size of one pool inbetween, we might 563 * need to recycle that pool here (if it's empty already). Thus scan 564 * all buffer pools now, starting with the last (likely empty) one. 565 */ 566 for (pool = RX_MAX_POOLS - 1; pool >= 0 ; pool--) { 567 if (dev->rx_pool[pool]->count == 0) { 568 dev->rx_pool[pool]->bufsize = size; 569 /* 570 * Sort pools by size so that spapr_vlan_receive() 571 * can later find the smallest buffer pool easily. 572 */ 573 qsort(dev->rx_pool, RX_MAX_POOLS, sizeof(dev->rx_pool[0]), 574 rx_pool_size_compare); 575 pool = spapr_vlan_get_rx_pool_id(dev, size); 576 DPRINTF("created RX pool %d for size %lld\n", pool, 577 VLAN_BD_LEN(buf)); 578 break; 579 } 580 } 581 } 582 /* Still no usable pool? Give up */ 583 if (pool < 0 || dev->rx_pool[pool]->count >= RX_POOL_MAX_BDS) { 584 return H_RESOURCE; 585 } 586 587 DPRINTF("h_add_llan_buf(): Add buf using pool %i (size %lli, count=%i)\n", 588 pool, VLAN_BD_LEN(buf), dev->rx_pool[pool]->count); 589 590 dev->rx_pool[pool]->bds[dev->rx_pool[pool]->count++] = buf; 591 592 return 0; 593 } 594 595 /** 596 * This is the old way of enqueuing receive buffers: Add it to the rx queue 597 * page that has been supplied by the guest (which is quite limited in size). 598 */ 599 static target_long spapr_vlan_add_rxbuf_to_page(VIOsPAPRVLANDevice *dev, 600 target_ulong buf) 601 { 602 vlan_bd_t bd; 603 604 if (dev->rx_bufs >= VLAN_MAX_BUFS) { 605 return H_RESOURCE; 606 } 607 608 do { 609 dev->add_buf_ptr += 8; 610 if (dev->add_buf_ptr >= VLAN_RX_BDS_LEN + VLAN_RX_BDS_OFF) { 611 dev->add_buf_ptr = VLAN_RX_BDS_OFF; 612 } 613 614 bd = vio_ldq(&dev->sdev, dev->buf_list + dev->add_buf_ptr); 615 } while (bd & VLAN_BD_VALID); 616 617 vio_stq(&dev->sdev, dev->buf_list + dev->add_buf_ptr, buf); 618 619 DPRINTF("h_add_llan_buf(): Added buf ptr=%d rx_bufs=%d bd=0x%016llx\n", 620 dev->add_buf_ptr, dev->rx_bufs, (unsigned long long)buf); 621 622 return 0; 623 } 624 625 static target_ulong h_add_logical_lan_buffer(PowerPCCPU *cpu, 626 sPAPRMachineState *spapr, 627 target_ulong opcode, 628 target_ulong *args) 629 { 630 target_ulong reg = args[0]; 631 target_ulong buf = args[1]; 632 VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); 633 VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(sdev); 634 target_long ret; 635 636 DPRINTF("H_ADD_LOGICAL_LAN_BUFFER(0x" TARGET_FMT_lx 637 ", 0x" TARGET_FMT_lx ")\n", reg, buf); 638 639 if (!sdev) { 640 hcall_dprintf("Bad device\n"); 641 return H_PARAMETER; 642 } 643 644 if ((check_bd(dev, buf, 4) < 0) 645 || (VLAN_BD_LEN(buf) < 16)) { 646 hcall_dprintf("Bad buffer enqueued\n"); 647 return H_PARAMETER; 648 } 649 650 if (!dev->isopen) { 651 return H_RESOURCE; 652 } 653 654 if (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) { 655 ret = spapr_vlan_add_rxbuf_to_pool(dev, buf); 656 } else { 657 ret = spapr_vlan_add_rxbuf_to_page(dev, buf); 658 } 659 if (ret) { 660 return ret; 661 } 662 663 dev->rx_bufs++; 664 665 /* 666 * Give guest some more time to add additional RX buffers before we 667 * flush the receive queue, so that e.g. fragmented IP packets can 668 * be passed to the guest in one go later (instead of passing single 669 * fragments if there is only one receive buffer available). 670 */ 671 timer_mod(dev->rxp_timer, qemu_clock_get_us(QEMU_CLOCK_VIRTUAL) + 500); 672 673 return H_SUCCESS; 674 } 675 676 static target_ulong h_send_logical_lan(PowerPCCPU *cpu, 677 sPAPRMachineState *spapr, 678 target_ulong opcode, target_ulong *args) 679 { 680 target_ulong reg = args[0]; 681 target_ulong *bufs = args + 1; 682 target_ulong continue_token = args[7]; 683 VIOsPAPRDevice *sdev = spapr_vio_find_by_reg(spapr->vio_bus, reg); 684 VIOsPAPRVLANDevice *dev = VIO_SPAPR_VLAN_DEVICE(sdev); 685 unsigned total_len; 686 uint8_t *lbuf, *p; 687 int i, nbufs; 688 int ret; 689 690 DPRINTF("H_SEND_LOGICAL_LAN(0x" TARGET_FMT_lx ", <bufs>, 0x" 691 TARGET_FMT_lx ")\n", reg, continue_token); 692 693 if (!sdev) { 694 return H_PARAMETER; 695 } 696 697 DPRINTF("rxbufs = %d\n", dev->rx_bufs); 698 699 if (!dev->isopen) { 700 return H_DROPPED; 701 } 702 703 if (continue_token) { 704 return H_HARDWARE; /* FIXME actually handle this */ 705 } 706 707 total_len = 0; 708 for (i = 0; i < 6; i++) { 709 DPRINTF(" buf desc: 0x" TARGET_FMT_lx "\n", bufs[i]); 710 if (!(bufs[i] & VLAN_BD_VALID)) { 711 break; 712 } 713 total_len += VLAN_BD_LEN(bufs[i]); 714 } 715 716 nbufs = i; 717 DPRINTF("h_send_logical_lan() %d buffers, total length 0x%x\n", 718 nbufs, total_len); 719 720 if (total_len == 0) { 721 return H_SUCCESS; 722 } 723 724 if (total_len > MAX_PACKET_SIZE) { 725 /* Don't let the guest force too large an allocation */ 726 return H_RESOURCE; 727 } 728 729 lbuf = alloca(total_len); 730 p = lbuf; 731 for (i = 0; i < nbufs; i++) { 732 ret = spapr_vio_dma_read(sdev, VLAN_BD_ADDR(bufs[i]), 733 p, VLAN_BD_LEN(bufs[i])); 734 if (ret < 0) { 735 return ret; 736 } 737 738 p += VLAN_BD_LEN(bufs[i]); 739 } 740 741 qemu_send_packet(qemu_get_queue(dev->nic), lbuf, total_len); 742 743 return H_SUCCESS; 744 } 745 746 static target_ulong h_multicast_ctrl(PowerPCCPU *cpu, sPAPRMachineState *spapr, 747 target_ulong opcode, target_ulong *args) 748 { 749 target_ulong reg = args[0]; 750 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg); 751 752 if (!dev) { 753 return H_PARAMETER; 754 } 755 756 return H_SUCCESS; 757 } 758 759 static Property spapr_vlan_properties[] = { 760 DEFINE_SPAPR_PROPERTIES(VIOsPAPRVLANDevice, sdev), 761 DEFINE_NIC_PROPERTIES(VIOsPAPRVLANDevice, nicconf), 762 DEFINE_PROP_BIT("use-rx-buffer-pools", VIOsPAPRVLANDevice, 763 compat_flags, SPAPRVLAN_FLAG_RX_BUF_POOLS_BIT, true), 764 DEFINE_PROP_END_OF_LIST(), 765 }; 766 767 static bool spapr_vlan_rx_buffer_pools_needed(void *opaque) 768 { 769 VIOsPAPRVLANDevice *dev = opaque; 770 771 return (dev->compat_flags & SPAPRVLAN_FLAG_RX_BUF_POOLS) != 0; 772 } 773 774 static const VMStateDescription vmstate_rx_buffer_pool = { 775 .name = "spapr_llan/rx_buffer_pool", 776 .version_id = 1, 777 .minimum_version_id = 1, 778 .needed = spapr_vlan_rx_buffer_pools_needed, 779 .fields = (VMStateField[]) { 780 VMSTATE_INT32(bufsize, RxBufPool), 781 VMSTATE_INT32(count, RxBufPool), 782 VMSTATE_UINT64_ARRAY(bds, RxBufPool, RX_POOL_MAX_BDS), 783 VMSTATE_END_OF_LIST() 784 } 785 }; 786 787 static const VMStateDescription vmstate_rx_pools = { 788 .name = "spapr_llan/rx_pools", 789 .version_id = 1, 790 .minimum_version_id = 1, 791 .needed = spapr_vlan_rx_buffer_pools_needed, 792 .fields = (VMStateField[]) { 793 VMSTATE_ARRAY_OF_POINTER_TO_STRUCT(rx_pool, VIOsPAPRVLANDevice, 794 RX_MAX_POOLS, 1, 795 vmstate_rx_buffer_pool, RxBufPool), 796 VMSTATE_END_OF_LIST() 797 } 798 }; 799 800 static const VMStateDescription vmstate_spapr_llan = { 801 .name = "spapr_llan", 802 .version_id = 1, 803 .minimum_version_id = 1, 804 .fields = (VMStateField[]) { 805 VMSTATE_SPAPR_VIO(sdev, VIOsPAPRVLANDevice), 806 /* LLAN state */ 807 VMSTATE_BOOL(isopen, VIOsPAPRVLANDevice), 808 VMSTATE_UINT64(buf_list, VIOsPAPRVLANDevice), 809 VMSTATE_UINT32(add_buf_ptr, VIOsPAPRVLANDevice), 810 VMSTATE_UINT32(use_buf_ptr, VIOsPAPRVLANDevice), 811 VMSTATE_UINT32(rx_bufs, VIOsPAPRVLANDevice), 812 VMSTATE_UINT64(rxq_ptr, VIOsPAPRVLANDevice), 813 814 VMSTATE_END_OF_LIST() 815 }, 816 .subsections = (const VMStateDescription * []) { 817 &vmstate_rx_pools, 818 NULL 819 } 820 }; 821 822 static void spapr_vlan_class_init(ObjectClass *klass, void *data) 823 { 824 DeviceClass *dc = DEVICE_CLASS(klass); 825 VIOsPAPRDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass); 826 827 k->realize = spapr_vlan_realize; 828 k->reset = spapr_vlan_reset; 829 k->devnode = spapr_vlan_devnode; 830 k->dt_name = "l-lan"; 831 k->dt_type = "network"; 832 k->dt_compatible = "IBM,l-lan"; 833 k->signal_mask = 0x1; 834 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 835 dc->props = spapr_vlan_properties; 836 k->rtce_window_size = 0x10000000; 837 dc->vmsd = &vmstate_spapr_llan; 838 } 839 840 static const TypeInfo spapr_vlan_info = { 841 .name = TYPE_VIO_SPAPR_VLAN_DEVICE, 842 .parent = TYPE_VIO_SPAPR_DEVICE, 843 .instance_size = sizeof(VIOsPAPRVLANDevice), 844 .class_init = spapr_vlan_class_init, 845 .instance_init = spapr_vlan_instance_init, 846 .instance_finalize = spapr_vlan_instance_finalize, 847 }; 848 849 static void spapr_vlan_register_types(void) 850 { 851 spapr_register_hypercall(H_REGISTER_LOGICAL_LAN, h_register_logical_lan); 852 spapr_register_hypercall(H_FREE_LOGICAL_LAN, h_free_logical_lan); 853 spapr_register_hypercall(H_SEND_LOGICAL_LAN, h_send_logical_lan); 854 spapr_register_hypercall(H_ADD_LOGICAL_LAN_BUFFER, 855 h_add_logical_lan_buffer); 856 spapr_register_hypercall(H_MULTICAST_CTRL, h_multicast_ctrl); 857 type_register_static(&spapr_vlan_info); 858 } 859 860 type_init(spapr_vlan_register_types) 861