1 /* QLogic qed NIC Driver 2 * Copyright (c) 2015-2017 QLogic Corporation 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and /or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 33 #include <linux/types.h> 34 #include <asm/byteorder.h> 35 #include <linux/dma-mapping.h> 36 #include <linux/if_vlan.h> 37 #include <linux/kernel.h> 38 #include <linux/pci.h> 39 #include <linux/slab.h> 40 #include <linux/stddef.h> 41 #include <linux/workqueue.h> 42 #include <net/ipv6.h> 43 #include <linux/bitops.h> 44 #include <linux/delay.h> 45 #include <linux/errno.h> 46 #include <linux/etherdevice.h> 47 #include <linux/io.h> 48 #include <linux/list.h> 49 #include <linux/mutex.h> 50 #include <linux/spinlock.h> 51 #include <linux/string.h> 52 #include <linux/qed/qed_ll2_if.h> 53 #include "qed.h" 54 #include "qed_cxt.h" 55 #include "qed_dev_api.h" 56 #include "qed_hsi.h" 57 #include "qed_hw.h" 58 #include "qed_int.h" 59 #include "qed_ll2.h" 60 #include "qed_mcp.h" 61 #include "qed_ooo.h" 62 #include "qed_reg_addr.h" 63 #include "qed_sp.h" 64 #include "qed_rdma.h" 65 66 #define QED_LL2_RX_REGISTERED(ll2) ((ll2)->rx_queue.b_cb_registred) 67 #define QED_LL2_TX_REGISTERED(ll2) ((ll2)->tx_queue.b_cb_registred) 68 69 #define QED_LL2_TX_SIZE (256) 70 #define QED_LL2_RX_SIZE (4096) 71 72 struct qed_cb_ll2_info { 73 int rx_cnt; 74 u32 rx_size; 75 u8 handle; 76 77 /* Lock protecting LL2 buffer lists in sleepless context */ 78 spinlock_t lock; 79 struct list_head list; 80 81 const struct qed_ll2_cb_ops *cbs; 82 void *cb_cookie; 83 }; 84 85 struct qed_ll2_buffer { 86 struct list_head list; 87 void *data; 88 dma_addr_t phys_addr; 89 }; 90 91 static void qed_ll2b_complete_tx_packet(void *cxt, 92 u8 connection_handle, 93 void *cookie, 94 dma_addr_t first_frag_addr, 95 bool b_last_fragment, 96 bool b_last_packet) 97 { 98 struct qed_hwfn *p_hwfn = cxt; 99 struct qed_dev *cdev = p_hwfn->cdev; 100 struct sk_buff *skb = cookie; 101 102 /* All we need to do is release the mapping */ 103 dma_unmap_single(&p_hwfn->cdev->pdev->dev, first_frag_addr, 104 skb_headlen(skb), DMA_TO_DEVICE); 105 106 if (cdev->ll2->cbs && cdev->ll2->cbs->tx_cb) 107 cdev->ll2->cbs->tx_cb(cdev->ll2->cb_cookie, skb, 108 b_last_fragment); 109 110 dev_kfree_skb_any(skb); 111 } 112 113 static int qed_ll2_alloc_buffer(struct qed_dev *cdev, 114 u8 **data, dma_addr_t *phys_addr) 115 { 116 *data = kmalloc(cdev->ll2->rx_size, GFP_ATOMIC); 117 if (!(*data)) { 118 DP_INFO(cdev, "Failed to allocate LL2 buffer data\n"); 119 return -ENOMEM; 120 } 121 122 *phys_addr = dma_map_single(&cdev->pdev->dev, 123 ((*data) + NET_SKB_PAD), 124 cdev->ll2->rx_size, DMA_FROM_DEVICE); 125 if (dma_mapping_error(&cdev->pdev->dev, *phys_addr)) { 126 DP_INFO(cdev, "Failed to map LL2 buffer data\n"); 127 kfree((*data)); 128 return -ENOMEM; 129 } 130 131 return 0; 132 } 133 134 static int qed_ll2_dealloc_buffer(struct qed_dev *cdev, 135 struct qed_ll2_buffer *buffer) 136 { 137 spin_lock_bh(&cdev->ll2->lock); 138 139 dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr, 140 cdev->ll2->rx_size, DMA_FROM_DEVICE); 141 kfree(buffer->data); 142 list_del(&buffer->list); 143 144 cdev->ll2->rx_cnt--; 145 if (!cdev->ll2->rx_cnt) 146 DP_INFO(cdev, "All LL2 entries were removed\n"); 147 148 spin_unlock_bh(&cdev->ll2->lock); 149 150 return 0; 151 } 152 153 static void qed_ll2_kill_buffers(struct qed_dev *cdev) 154 { 155 struct qed_ll2_buffer *buffer, *tmp_buffer; 156 157 list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) 158 qed_ll2_dealloc_buffer(cdev, buffer); 159 } 160 161 void qed_ll2b_complete_rx_packet(void *cxt, struct qed_ll2_comp_rx_data *data) 162 { 163 struct qed_hwfn *p_hwfn = cxt; 164 struct qed_ll2_buffer *buffer = data->cookie; 165 struct qed_dev *cdev = p_hwfn->cdev; 166 dma_addr_t new_phys_addr; 167 struct sk_buff *skb; 168 bool reuse = false; 169 int rc = -EINVAL; 170 u8 *new_data; 171 172 DP_VERBOSE(p_hwfn, 173 (NETIF_MSG_RX_STATUS | QED_MSG_STORAGE | NETIF_MSG_PKTDATA), 174 "Got an LL2 Rx completion: [Buffer at phys 0x%llx, offset 0x%02x] Length 0x%04x Parse_flags 0x%04x vlan 0x%04x Opaque data [0x%08x:0x%08x]\n", 175 (u64)data->rx_buf_addr, 176 data->u.placement_offset, 177 data->length.packet_length, 178 data->parse_flags, 179 data->vlan, data->opaque_data_0, data->opaque_data_1); 180 181 if ((cdev->dp_module & NETIF_MSG_PKTDATA) && buffer->data) { 182 print_hex_dump(KERN_INFO, "", 183 DUMP_PREFIX_OFFSET, 16, 1, 184 buffer->data, data->length.packet_length, false); 185 } 186 187 /* Determine if data is valid */ 188 if (data->length.packet_length < ETH_HLEN) 189 reuse = true; 190 191 /* Allocate a replacement for buffer; Reuse upon failure */ 192 if (!reuse) 193 rc = qed_ll2_alloc_buffer(p_hwfn->cdev, &new_data, 194 &new_phys_addr); 195 196 /* If need to reuse or there's no replacement buffer, repost this */ 197 if (rc) 198 goto out_post; 199 dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr, 200 cdev->ll2->rx_size, DMA_FROM_DEVICE); 201 202 skb = build_skb(buffer->data, 0); 203 if (!skb) { 204 rc = -ENOMEM; 205 goto out_post; 206 } 207 208 data->u.placement_offset += NET_SKB_PAD; 209 skb_reserve(skb, data->u.placement_offset); 210 skb_put(skb, data->length.packet_length); 211 skb_checksum_none_assert(skb); 212 213 /* Get parital ethernet information instead of eth_type_trans(), 214 * Since we don't have an associated net_device. 215 */ 216 skb_reset_mac_header(skb); 217 skb->protocol = eth_hdr(skb)->h_proto; 218 219 /* Pass SKB onward */ 220 if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) { 221 if (data->vlan) 222 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 223 data->vlan); 224 cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb, 225 data->opaque_data_0, 226 data->opaque_data_1); 227 } 228 229 /* Update Buffer information and update FW producer */ 230 buffer->data = new_data; 231 buffer->phys_addr = new_phys_addr; 232 233 out_post: 234 rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev), cdev->ll2->handle, 235 buffer->phys_addr, 0, buffer, 1); 236 237 if (rc) 238 qed_ll2_dealloc_buffer(cdev, buffer); 239 } 240 241 static struct qed_ll2_info *__qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn, 242 u8 connection_handle, 243 bool b_lock, 244 bool b_only_active) 245 { 246 struct qed_ll2_info *p_ll2_conn, *p_ret = NULL; 247 248 if (connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) 249 return NULL; 250 251 if (!p_hwfn->p_ll2_info) 252 return NULL; 253 254 p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle]; 255 256 if (b_only_active) { 257 if (b_lock) 258 mutex_lock(&p_ll2_conn->mutex); 259 if (p_ll2_conn->b_active) 260 p_ret = p_ll2_conn; 261 if (b_lock) 262 mutex_unlock(&p_ll2_conn->mutex); 263 } else { 264 p_ret = p_ll2_conn; 265 } 266 267 return p_ret; 268 } 269 270 static struct qed_ll2_info *qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn, 271 u8 connection_handle) 272 { 273 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, true); 274 } 275 276 static struct qed_ll2_info *qed_ll2_handle_sanity_lock(struct qed_hwfn *p_hwfn, 277 u8 connection_handle) 278 { 279 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, true, true); 280 } 281 282 static struct qed_ll2_info *qed_ll2_handle_sanity_inactive(struct qed_hwfn 283 *p_hwfn, 284 u8 connection_handle) 285 { 286 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, false); 287 } 288 289 static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle) 290 { 291 bool b_last_packet = false, b_last_frag = false; 292 struct qed_ll2_tx_packet *p_pkt = NULL; 293 struct qed_ll2_info *p_ll2_conn; 294 struct qed_ll2_tx_queue *p_tx; 295 dma_addr_t tx_frag; 296 297 p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle); 298 if (!p_ll2_conn) 299 return; 300 301 p_tx = &p_ll2_conn->tx_queue; 302 303 while (!list_empty(&p_tx->active_descq)) { 304 p_pkt = list_first_entry(&p_tx->active_descq, 305 struct qed_ll2_tx_packet, list_entry); 306 if (!p_pkt) 307 break; 308 309 list_del(&p_pkt->list_entry); 310 b_last_packet = list_empty(&p_tx->active_descq); 311 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq); 312 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) { 313 struct qed_ooo_buffer *p_buffer; 314 315 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie; 316 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, 317 p_buffer); 318 } else { 319 p_tx->cur_completing_packet = *p_pkt; 320 p_tx->cur_completing_bd_idx = 1; 321 b_last_frag = 322 p_tx->cur_completing_bd_idx == p_pkt->bd_used; 323 tx_frag = p_pkt->bds_set[0].tx_frag; 324 p_ll2_conn->cbs.tx_release_cb(p_ll2_conn->cbs.cookie, 325 p_ll2_conn->my_id, 326 p_pkt->cookie, 327 tx_frag, 328 b_last_frag, 329 b_last_packet); 330 } 331 } 332 } 333 334 static int qed_ll2_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie) 335 { 336 struct qed_ll2_info *p_ll2_conn = p_cookie; 337 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; 338 u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0; 339 struct qed_ll2_tx_packet *p_pkt; 340 bool b_last_frag = false; 341 unsigned long flags; 342 int rc = -EINVAL; 343 344 spin_lock_irqsave(&p_tx->lock, flags); 345 if (p_tx->b_completing_packet) { 346 rc = -EBUSY; 347 goto out; 348 } 349 350 new_idx = le16_to_cpu(*p_tx->p_fw_cons); 351 num_bds = ((s16)new_idx - (s16)p_tx->bds_idx); 352 while (num_bds) { 353 if (list_empty(&p_tx->active_descq)) 354 goto out; 355 356 p_pkt = list_first_entry(&p_tx->active_descq, 357 struct qed_ll2_tx_packet, list_entry); 358 if (!p_pkt) 359 goto out; 360 361 p_tx->b_completing_packet = true; 362 p_tx->cur_completing_packet = *p_pkt; 363 num_bds_in_packet = p_pkt->bd_used; 364 list_del(&p_pkt->list_entry); 365 366 if (num_bds < num_bds_in_packet) { 367 DP_NOTICE(p_hwfn, 368 "Rest of BDs does not cover whole packet\n"); 369 goto out; 370 } 371 372 num_bds -= num_bds_in_packet; 373 p_tx->bds_idx += num_bds_in_packet; 374 while (num_bds_in_packet--) 375 qed_chain_consume(&p_tx->txq_chain); 376 377 p_tx->cur_completing_bd_idx = 1; 378 b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used; 379 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq); 380 381 spin_unlock_irqrestore(&p_tx->lock, flags); 382 383 p_ll2_conn->cbs.tx_comp_cb(p_ll2_conn->cbs.cookie, 384 p_ll2_conn->my_id, 385 p_pkt->cookie, 386 p_pkt->bds_set[0].tx_frag, 387 b_last_frag, !num_bds); 388 389 spin_lock_irqsave(&p_tx->lock, flags); 390 } 391 392 p_tx->b_completing_packet = false; 393 rc = 0; 394 out: 395 spin_unlock_irqrestore(&p_tx->lock, flags); 396 return rc; 397 } 398 399 static void qed_ll2_rxq_parse_gsi(struct qed_hwfn *p_hwfn, 400 union core_rx_cqe_union *p_cqe, 401 struct qed_ll2_comp_rx_data *data) 402 { 403 data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_gsi.parse_flags.flags); 404 data->length.data_length = le16_to_cpu(p_cqe->rx_cqe_gsi.data_length); 405 data->vlan = le16_to_cpu(p_cqe->rx_cqe_gsi.vlan); 406 data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrhi); 407 data->opaque_data_1 = le16_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrlo); 408 data->u.data_length_error = p_cqe->rx_cqe_gsi.data_length_error; 409 data->qp_id = le16_to_cpu(p_cqe->rx_cqe_gsi.qp_id); 410 411 data->src_qp = le32_to_cpu(p_cqe->rx_cqe_gsi.src_qp); 412 } 413 414 static void qed_ll2_rxq_parse_reg(struct qed_hwfn *p_hwfn, 415 union core_rx_cqe_union *p_cqe, 416 struct qed_ll2_comp_rx_data *data) 417 { 418 data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_fp.parse_flags.flags); 419 data->err_flags = le16_to_cpu(p_cqe->rx_cqe_fp.err_flags.flags); 420 data->length.packet_length = 421 le16_to_cpu(p_cqe->rx_cqe_fp.packet_length); 422 data->vlan = le16_to_cpu(p_cqe->rx_cqe_fp.vlan); 423 data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[0]); 424 data->opaque_data_1 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[1]); 425 data->u.placement_offset = p_cqe->rx_cqe_fp.placement_offset; 426 } 427 428 static int 429 qed_ll2_handle_slowpath(struct qed_hwfn *p_hwfn, 430 struct qed_ll2_info *p_ll2_conn, 431 union core_rx_cqe_union *p_cqe, 432 unsigned long *p_lock_flags) 433 { 434 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; 435 struct core_rx_slow_path_cqe *sp_cqe; 436 437 sp_cqe = &p_cqe->rx_cqe_sp; 438 if (sp_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH) { 439 DP_NOTICE(p_hwfn, 440 "LL2 - unexpected Rx CQE slowpath ramrod_cmd_id:%d\n", 441 sp_cqe->ramrod_cmd_id); 442 return -EINVAL; 443 } 444 445 if (!p_ll2_conn->cbs.slowpath_cb) { 446 DP_NOTICE(p_hwfn, 447 "LL2 - received RX_QUEUE_FLUSH but no callback was provided\n"); 448 return -EINVAL; 449 } 450 451 spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags); 452 453 p_ll2_conn->cbs.slowpath_cb(p_ll2_conn->cbs.cookie, 454 p_ll2_conn->my_id, 455 le32_to_cpu(sp_cqe->opaque_data.data[0]), 456 le32_to_cpu(sp_cqe->opaque_data.data[1])); 457 458 spin_lock_irqsave(&p_rx->lock, *p_lock_flags); 459 460 return 0; 461 } 462 463 static int 464 qed_ll2_rxq_handle_completion(struct qed_hwfn *p_hwfn, 465 struct qed_ll2_info *p_ll2_conn, 466 union core_rx_cqe_union *p_cqe, 467 unsigned long *p_lock_flags, bool b_last_cqe) 468 { 469 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; 470 struct qed_ll2_rx_packet *p_pkt = NULL; 471 struct qed_ll2_comp_rx_data data; 472 473 if (!list_empty(&p_rx->active_descq)) 474 p_pkt = list_first_entry(&p_rx->active_descq, 475 struct qed_ll2_rx_packet, list_entry); 476 if (!p_pkt) { 477 DP_NOTICE(p_hwfn, 478 "[%d] LL2 Rx completion but active_descq is empty\n", 479 p_ll2_conn->input.conn_type); 480 481 return -EIO; 482 } 483 list_del(&p_pkt->list_entry); 484 485 if (p_cqe->rx_cqe_sp.type == CORE_RX_CQE_TYPE_REGULAR) 486 qed_ll2_rxq_parse_reg(p_hwfn, p_cqe, &data); 487 else 488 qed_ll2_rxq_parse_gsi(p_hwfn, p_cqe, &data); 489 if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd) 490 DP_NOTICE(p_hwfn, 491 "Mismatch between active_descq and the LL2 Rx chain\n"); 492 493 list_add_tail(&p_pkt->list_entry, &p_rx->free_descq); 494 495 data.connection_handle = p_ll2_conn->my_id; 496 data.cookie = p_pkt->cookie; 497 data.rx_buf_addr = p_pkt->rx_buf_addr; 498 data.b_last_packet = b_last_cqe; 499 500 spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags); 501 p_ll2_conn->cbs.rx_comp_cb(p_ll2_conn->cbs.cookie, &data); 502 503 spin_lock_irqsave(&p_rx->lock, *p_lock_flags); 504 505 return 0; 506 } 507 508 static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie) 509 { 510 struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)cookie; 511 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; 512 union core_rx_cqe_union *cqe = NULL; 513 u16 cq_new_idx = 0, cq_old_idx = 0; 514 unsigned long flags = 0; 515 int rc = 0; 516 517 spin_lock_irqsave(&p_rx->lock, flags); 518 cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons); 519 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain); 520 521 while (cq_new_idx != cq_old_idx) { 522 bool b_last_cqe = (cq_new_idx == cq_old_idx); 523 524 cqe = 525 (union core_rx_cqe_union *) 526 qed_chain_consume(&p_rx->rcq_chain); 527 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain); 528 529 DP_VERBOSE(p_hwfn, 530 QED_MSG_LL2, 531 "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n", 532 cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type); 533 534 switch (cqe->rx_cqe_sp.type) { 535 case CORE_RX_CQE_TYPE_SLOW_PATH: 536 rc = qed_ll2_handle_slowpath(p_hwfn, p_ll2_conn, 537 cqe, &flags); 538 break; 539 case CORE_RX_CQE_TYPE_GSI_OFFLOAD: 540 case CORE_RX_CQE_TYPE_REGULAR: 541 rc = qed_ll2_rxq_handle_completion(p_hwfn, p_ll2_conn, 542 cqe, &flags, 543 b_last_cqe); 544 break; 545 default: 546 rc = -EIO; 547 } 548 } 549 550 spin_unlock_irqrestore(&p_rx->lock, flags); 551 return rc; 552 } 553 554 static void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle) 555 { 556 struct qed_ll2_info *p_ll2_conn = NULL; 557 struct qed_ll2_rx_packet *p_pkt = NULL; 558 struct qed_ll2_rx_queue *p_rx; 559 560 p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle); 561 if (!p_ll2_conn) 562 return; 563 564 p_rx = &p_ll2_conn->rx_queue; 565 566 while (!list_empty(&p_rx->active_descq)) { 567 p_pkt = list_first_entry(&p_rx->active_descq, 568 struct qed_ll2_rx_packet, list_entry); 569 if (!p_pkt) 570 break; 571 572 list_move_tail(&p_pkt->list_entry, &p_rx->free_descq); 573 574 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) { 575 struct qed_ooo_buffer *p_buffer; 576 577 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie; 578 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, 579 p_buffer); 580 } else { 581 dma_addr_t rx_buf_addr = p_pkt->rx_buf_addr; 582 void *cookie = p_pkt->cookie; 583 bool b_last; 584 585 b_last = list_empty(&p_rx->active_descq); 586 p_ll2_conn->cbs.rx_release_cb(p_ll2_conn->cbs.cookie, 587 p_ll2_conn->my_id, 588 cookie, 589 rx_buf_addr, b_last); 590 } 591 } 592 } 593 594 static u8 qed_ll2_convert_rx_parse_to_tx_flags(u16 parse_flags) 595 { 596 u8 bd_flags = 0; 597 598 if (GET_FIELD(parse_flags, PARSING_AND_ERR_FLAGS_TAG8021QEXIST)) 599 SET_FIELD(bd_flags, CORE_TX_BD_DATA_VLAN_INSERTION, 1); 600 601 return bd_flags; 602 } 603 604 static int qed_ll2_lb_rxq_handler(struct qed_hwfn *p_hwfn, 605 struct qed_ll2_info *p_ll2_conn) 606 { 607 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; 608 u16 packet_length = 0, parse_flags = 0, vlan = 0; 609 struct qed_ll2_rx_packet *p_pkt = NULL; 610 u32 num_ooo_add_to_peninsula = 0, cid; 611 union core_rx_cqe_union *cqe = NULL; 612 u16 cq_new_idx = 0, cq_old_idx = 0; 613 struct qed_ooo_buffer *p_buffer; 614 struct ooo_opaque *iscsi_ooo; 615 u8 placement_offset = 0; 616 u8 cqe_type; 617 618 cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons); 619 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain); 620 if (cq_new_idx == cq_old_idx) 621 return 0; 622 623 while (cq_new_idx != cq_old_idx) { 624 struct core_rx_fast_path_cqe *p_cqe_fp; 625 626 cqe = qed_chain_consume(&p_rx->rcq_chain); 627 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain); 628 cqe_type = cqe->rx_cqe_sp.type; 629 630 if (cqe_type != CORE_RX_CQE_TYPE_REGULAR) { 631 DP_NOTICE(p_hwfn, 632 "Got a non-regular LB LL2 completion [type 0x%02x]\n", 633 cqe_type); 634 return -EINVAL; 635 } 636 p_cqe_fp = &cqe->rx_cqe_fp; 637 638 placement_offset = p_cqe_fp->placement_offset; 639 parse_flags = le16_to_cpu(p_cqe_fp->parse_flags.flags); 640 packet_length = le16_to_cpu(p_cqe_fp->packet_length); 641 vlan = le16_to_cpu(p_cqe_fp->vlan); 642 iscsi_ooo = (struct ooo_opaque *)&p_cqe_fp->opaque_data; 643 qed_ooo_save_history_entry(p_hwfn, p_hwfn->p_ooo_info, 644 iscsi_ooo); 645 cid = le32_to_cpu(iscsi_ooo->cid); 646 647 /* Process delete isle first */ 648 if (iscsi_ooo->drop_size) 649 qed_ooo_delete_isles(p_hwfn, p_hwfn->p_ooo_info, cid, 650 iscsi_ooo->drop_isle, 651 iscsi_ooo->drop_size); 652 653 if (iscsi_ooo->ooo_opcode == TCP_EVENT_NOP) 654 continue; 655 656 /* Now process create/add/join isles */ 657 if (list_empty(&p_rx->active_descq)) { 658 DP_NOTICE(p_hwfn, 659 "LL2 OOO RX chain has no submitted buffers\n" 660 ); 661 return -EIO; 662 } 663 664 p_pkt = list_first_entry(&p_rx->active_descq, 665 struct qed_ll2_rx_packet, list_entry); 666 667 if ((iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_NEW_ISLE) || 668 (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_RIGHT) || 669 (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_LEFT) || 670 (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_PEN) || 671 (iscsi_ooo->ooo_opcode == TCP_EVENT_JOIN)) { 672 if (!p_pkt) { 673 DP_NOTICE(p_hwfn, 674 "LL2 OOO RX packet is not valid\n"); 675 return -EIO; 676 } 677 list_del(&p_pkt->list_entry); 678 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie; 679 p_buffer->packet_length = packet_length; 680 p_buffer->parse_flags = parse_flags; 681 p_buffer->vlan = vlan; 682 p_buffer->placement_offset = placement_offset; 683 qed_chain_consume(&p_rx->rxq_chain); 684 list_add_tail(&p_pkt->list_entry, &p_rx->free_descq); 685 686 switch (iscsi_ooo->ooo_opcode) { 687 case TCP_EVENT_ADD_NEW_ISLE: 688 qed_ooo_add_new_isle(p_hwfn, 689 p_hwfn->p_ooo_info, 690 cid, 691 iscsi_ooo->ooo_isle, 692 p_buffer); 693 break; 694 case TCP_EVENT_ADD_ISLE_RIGHT: 695 qed_ooo_add_new_buffer(p_hwfn, 696 p_hwfn->p_ooo_info, 697 cid, 698 iscsi_ooo->ooo_isle, 699 p_buffer, 700 QED_OOO_RIGHT_BUF); 701 break; 702 case TCP_EVENT_ADD_ISLE_LEFT: 703 qed_ooo_add_new_buffer(p_hwfn, 704 p_hwfn->p_ooo_info, 705 cid, 706 iscsi_ooo->ooo_isle, 707 p_buffer, 708 QED_OOO_LEFT_BUF); 709 break; 710 case TCP_EVENT_JOIN: 711 qed_ooo_add_new_buffer(p_hwfn, 712 p_hwfn->p_ooo_info, 713 cid, 714 iscsi_ooo->ooo_isle + 715 1, 716 p_buffer, 717 QED_OOO_LEFT_BUF); 718 qed_ooo_join_isles(p_hwfn, 719 p_hwfn->p_ooo_info, 720 cid, iscsi_ooo->ooo_isle); 721 break; 722 case TCP_EVENT_ADD_PEN: 723 num_ooo_add_to_peninsula++; 724 qed_ooo_put_ready_buffer(p_hwfn, 725 p_hwfn->p_ooo_info, 726 p_buffer, true); 727 break; 728 } 729 } else { 730 DP_NOTICE(p_hwfn, 731 "Unexpected event (%d) TX OOO completion\n", 732 iscsi_ooo->ooo_opcode); 733 } 734 } 735 736 return 0; 737 } 738 739 static void 740 qed_ooo_submit_tx_buffers(struct qed_hwfn *p_hwfn, 741 struct qed_ll2_info *p_ll2_conn) 742 { 743 struct qed_ll2_tx_pkt_info tx_pkt; 744 struct qed_ooo_buffer *p_buffer; 745 u16 l4_hdr_offset_w; 746 dma_addr_t first_frag; 747 u16 parse_flags; 748 u8 bd_flags; 749 int rc; 750 751 /* Submit Tx buffers here */ 752 while ((p_buffer = qed_ooo_get_ready_buffer(p_hwfn, 753 p_hwfn->p_ooo_info))) { 754 l4_hdr_offset_w = 0; 755 bd_flags = 0; 756 757 first_frag = p_buffer->rx_buffer_phys_addr + 758 p_buffer->placement_offset; 759 parse_flags = p_buffer->parse_flags; 760 bd_flags = qed_ll2_convert_rx_parse_to_tx_flags(parse_flags); 761 SET_FIELD(bd_flags, CORE_TX_BD_DATA_FORCE_VLAN_MODE, 1); 762 SET_FIELD(bd_flags, CORE_TX_BD_DATA_L4_PROTOCOL, 1); 763 764 memset(&tx_pkt, 0, sizeof(tx_pkt)); 765 tx_pkt.num_of_bds = 1; 766 tx_pkt.vlan = p_buffer->vlan; 767 tx_pkt.bd_flags = bd_flags; 768 tx_pkt.l4_hdr_offset_w = l4_hdr_offset_w; 769 tx_pkt.tx_dest = p_ll2_conn->tx_dest; 770 tx_pkt.first_frag = first_frag; 771 tx_pkt.first_frag_len = p_buffer->packet_length; 772 tx_pkt.cookie = p_buffer; 773 774 rc = qed_ll2_prepare_tx_packet(p_hwfn, p_ll2_conn->my_id, 775 &tx_pkt, true); 776 if (rc) { 777 qed_ooo_put_ready_buffer(p_hwfn, p_hwfn->p_ooo_info, 778 p_buffer, false); 779 break; 780 } 781 } 782 } 783 784 static void 785 qed_ooo_submit_rx_buffers(struct qed_hwfn *p_hwfn, 786 struct qed_ll2_info *p_ll2_conn) 787 { 788 struct qed_ooo_buffer *p_buffer; 789 int rc; 790 791 while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn, 792 p_hwfn->p_ooo_info))) { 793 rc = qed_ll2_post_rx_buffer(p_hwfn, 794 p_ll2_conn->my_id, 795 p_buffer->rx_buffer_phys_addr, 796 0, p_buffer, true); 797 if (rc) { 798 qed_ooo_put_free_buffer(p_hwfn, 799 p_hwfn->p_ooo_info, p_buffer); 800 break; 801 } 802 } 803 } 804 805 static int qed_ll2_lb_rxq_completion(struct qed_hwfn *p_hwfn, void *p_cookie) 806 { 807 struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie; 808 int rc; 809 810 rc = qed_ll2_lb_rxq_handler(p_hwfn, p_ll2_conn); 811 if (rc) 812 return rc; 813 814 qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn); 815 qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn); 816 817 return 0; 818 } 819 820 static int qed_ll2_lb_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie) 821 { 822 struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie; 823 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; 824 struct qed_ll2_tx_packet *p_pkt = NULL; 825 struct qed_ooo_buffer *p_buffer; 826 bool b_dont_submit_rx = false; 827 u16 new_idx = 0, num_bds = 0; 828 int rc; 829 830 new_idx = le16_to_cpu(*p_tx->p_fw_cons); 831 num_bds = ((s16)new_idx - (s16)p_tx->bds_idx); 832 833 if (!num_bds) 834 return 0; 835 836 while (num_bds) { 837 if (list_empty(&p_tx->active_descq)) 838 return -EINVAL; 839 840 p_pkt = list_first_entry(&p_tx->active_descq, 841 struct qed_ll2_tx_packet, list_entry); 842 if (!p_pkt) 843 return -EINVAL; 844 845 if (p_pkt->bd_used != 1) { 846 DP_NOTICE(p_hwfn, 847 "Unexpectedly many BDs(%d) in TX OOO completion\n", 848 p_pkt->bd_used); 849 return -EINVAL; 850 } 851 852 list_del(&p_pkt->list_entry); 853 854 num_bds--; 855 p_tx->bds_idx++; 856 qed_chain_consume(&p_tx->txq_chain); 857 858 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie; 859 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq); 860 861 if (b_dont_submit_rx) { 862 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, 863 p_buffer); 864 continue; 865 } 866 867 rc = qed_ll2_post_rx_buffer(p_hwfn, p_ll2_conn->my_id, 868 p_buffer->rx_buffer_phys_addr, 0, 869 p_buffer, true); 870 if (rc != 0) { 871 qed_ooo_put_free_buffer(p_hwfn, 872 p_hwfn->p_ooo_info, p_buffer); 873 b_dont_submit_rx = true; 874 } 875 } 876 877 qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn); 878 879 return 0; 880 } 881 882 static void qed_ll2_stop_ooo(struct qed_dev *cdev) 883 { 884 struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev); 885 u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id; 886 887 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Stopping LL2 OOO queue [%02x]\n", 888 *handle); 889 890 qed_ll2_terminate_connection(hwfn, *handle); 891 qed_ll2_release_connection(hwfn, *handle); 892 *handle = QED_LL2_UNUSED_HANDLE; 893 } 894 895 static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn, 896 struct qed_ll2_info *p_ll2_conn, 897 u8 action_on_error) 898 { 899 enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type; 900 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; 901 struct core_rx_start_ramrod_data *p_ramrod = NULL; 902 struct qed_spq_entry *p_ent = NULL; 903 struct qed_sp_init_data init_data; 904 u16 cqe_pbl_size; 905 int rc = 0; 906 907 /* Get SPQ entry */ 908 memset(&init_data, 0, sizeof(init_data)); 909 init_data.cid = p_ll2_conn->cid; 910 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; 911 init_data.comp_mode = QED_SPQ_MODE_EBLOCK; 912 913 rc = qed_sp_init_request(p_hwfn, &p_ent, 914 CORE_RAMROD_RX_QUEUE_START, 915 PROTOCOLID_CORE, &init_data); 916 if (rc) 917 return rc; 918 919 p_ramrod = &p_ent->ramrod.core_rx_queue_start; 920 921 p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn)); 922 p_ramrod->sb_index = p_rx->rx_sb_index; 923 p_ramrod->complete_event_flg = 1; 924 925 p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu); 926 DMA_REGPAIR_LE(p_ramrod->bd_base, p_rx->rxq_chain.p_phys_addr); 927 cqe_pbl_size = (u16)qed_chain_get_page_cnt(&p_rx->rcq_chain); 928 p_ramrod->num_of_pbl_pages = cpu_to_le16(cqe_pbl_size); 929 DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr, 930 qed_chain_get_pbl_phys(&p_rx->rcq_chain)); 931 932 p_ramrod->drop_ttl0_flg = p_ll2_conn->input.rx_drop_ttl0_flg; 933 p_ramrod->inner_vlan_stripping_en = 934 p_ll2_conn->input.rx_vlan_removal_en; 935 p_ramrod->queue_id = p_ll2_conn->queue_id; 936 p_ramrod->main_func_queue = p_ll2_conn->main_func_queue ? 1 : 0; 937 938 if ((IS_MF_DEFAULT(p_hwfn) || IS_MF_SI(p_hwfn)) && 939 p_ramrod->main_func_queue && (conn_type != QED_LL2_TYPE_ROCE) && 940 (conn_type != QED_LL2_TYPE_IWARP)) { 941 p_ramrod->mf_si_bcast_accept_all = 1; 942 p_ramrod->mf_si_mcast_accept_all = 1; 943 } else { 944 p_ramrod->mf_si_bcast_accept_all = 0; 945 p_ramrod->mf_si_mcast_accept_all = 0; 946 } 947 948 p_ramrod->action_on_error.error_type = action_on_error; 949 p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable; 950 return qed_spq_post(p_hwfn, p_ent, NULL); 951 } 952 953 static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn, 954 struct qed_ll2_info *p_ll2_conn) 955 { 956 enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type; 957 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; 958 struct core_tx_start_ramrod_data *p_ramrod = NULL; 959 struct qed_spq_entry *p_ent = NULL; 960 struct qed_sp_init_data init_data; 961 u16 pq_id = 0, pbl_size; 962 int rc = -EINVAL; 963 964 if (!QED_LL2_TX_REGISTERED(p_ll2_conn)) 965 return 0; 966 967 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) 968 p_ll2_conn->tx_stats_en = 0; 969 else 970 p_ll2_conn->tx_stats_en = 1; 971 972 /* Get SPQ entry */ 973 memset(&init_data, 0, sizeof(init_data)); 974 init_data.cid = p_ll2_conn->cid; 975 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; 976 init_data.comp_mode = QED_SPQ_MODE_EBLOCK; 977 978 rc = qed_sp_init_request(p_hwfn, &p_ent, 979 CORE_RAMROD_TX_QUEUE_START, 980 PROTOCOLID_CORE, &init_data); 981 if (rc) 982 return rc; 983 984 p_ramrod = &p_ent->ramrod.core_tx_queue_start; 985 986 p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn)); 987 p_ramrod->sb_index = p_tx->tx_sb_index; 988 p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu); 989 p_ramrod->stats_en = p_ll2_conn->tx_stats_en; 990 p_ramrod->stats_id = p_ll2_conn->tx_stats_id; 991 992 DMA_REGPAIR_LE(p_ramrod->pbl_base_addr, 993 qed_chain_get_pbl_phys(&p_tx->txq_chain)); 994 pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain); 995 p_ramrod->pbl_size = cpu_to_le16(pbl_size); 996 997 switch (p_ll2_conn->input.tx_tc) { 998 case PURE_LB_TC: 999 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB); 1000 break; 1001 case PKT_LB_TC: 1002 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OOO); 1003 break; 1004 default: 1005 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD); 1006 break; 1007 } 1008 1009 p_ramrod->qm_pq_id = cpu_to_le16(pq_id); 1010 1011 switch (conn_type) { 1012 case QED_LL2_TYPE_FCOE: 1013 p_ramrod->conn_type = PROTOCOLID_FCOE; 1014 break; 1015 case QED_LL2_TYPE_ISCSI: 1016 p_ramrod->conn_type = PROTOCOLID_ISCSI; 1017 break; 1018 case QED_LL2_TYPE_ROCE: 1019 p_ramrod->conn_type = PROTOCOLID_ROCE; 1020 break; 1021 case QED_LL2_TYPE_IWARP: 1022 p_ramrod->conn_type = PROTOCOLID_IWARP; 1023 break; 1024 case QED_LL2_TYPE_OOO: 1025 if (p_hwfn->hw_info.personality == QED_PCI_ISCSI) 1026 p_ramrod->conn_type = PROTOCOLID_ISCSI; 1027 else 1028 p_ramrod->conn_type = PROTOCOLID_IWARP; 1029 break; 1030 default: 1031 p_ramrod->conn_type = PROTOCOLID_ETH; 1032 DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type); 1033 } 1034 1035 p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable; 1036 1037 return qed_spq_post(p_hwfn, p_ent, NULL); 1038 } 1039 1040 static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn, 1041 struct qed_ll2_info *p_ll2_conn) 1042 { 1043 struct core_rx_stop_ramrod_data *p_ramrod = NULL; 1044 struct qed_spq_entry *p_ent = NULL; 1045 struct qed_sp_init_data init_data; 1046 int rc = -EINVAL; 1047 1048 /* Get SPQ entry */ 1049 memset(&init_data, 0, sizeof(init_data)); 1050 init_data.cid = p_ll2_conn->cid; 1051 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; 1052 init_data.comp_mode = QED_SPQ_MODE_EBLOCK; 1053 1054 rc = qed_sp_init_request(p_hwfn, &p_ent, 1055 CORE_RAMROD_RX_QUEUE_STOP, 1056 PROTOCOLID_CORE, &init_data); 1057 if (rc) 1058 return rc; 1059 1060 p_ramrod = &p_ent->ramrod.core_rx_queue_stop; 1061 1062 p_ramrod->complete_event_flg = 1; 1063 p_ramrod->queue_id = p_ll2_conn->queue_id; 1064 1065 return qed_spq_post(p_hwfn, p_ent, NULL); 1066 } 1067 1068 static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn, 1069 struct qed_ll2_info *p_ll2_conn) 1070 { 1071 struct qed_spq_entry *p_ent = NULL; 1072 struct qed_sp_init_data init_data; 1073 int rc = -EINVAL; 1074 1075 /* Get SPQ entry */ 1076 memset(&init_data, 0, sizeof(init_data)); 1077 init_data.cid = p_ll2_conn->cid; 1078 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; 1079 init_data.comp_mode = QED_SPQ_MODE_EBLOCK; 1080 1081 rc = qed_sp_init_request(p_hwfn, &p_ent, 1082 CORE_RAMROD_TX_QUEUE_STOP, 1083 PROTOCOLID_CORE, &init_data); 1084 if (rc) 1085 return rc; 1086 1087 return qed_spq_post(p_hwfn, p_ent, NULL); 1088 } 1089 1090 static int 1091 qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn, 1092 struct qed_ll2_info *p_ll2_info) 1093 { 1094 struct qed_ll2_rx_packet *p_descq; 1095 u32 capacity; 1096 int rc = 0; 1097 1098 if (!p_ll2_info->input.rx_num_desc) 1099 goto out; 1100 1101 rc = qed_chain_alloc(p_hwfn->cdev, 1102 QED_CHAIN_USE_TO_CONSUME_PRODUCE, 1103 QED_CHAIN_MODE_NEXT_PTR, 1104 QED_CHAIN_CNT_TYPE_U16, 1105 p_ll2_info->input.rx_num_desc, 1106 sizeof(struct core_rx_bd), 1107 &p_ll2_info->rx_queue.rxq_chain, NULL); 1108 if (rc) { 1109 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n"); 1110 goto out; 1111 } 1112 1113 capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain); 1114 p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet), 1115 GFP_KERNEL); 1116 if (!p_descq) { 1117 rc = -ENOMEM; 1118 DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n"); 1119 goto out; 1120 } 1121 p_ll2_info->rx_queue.descq_array = p_descq; 1122 1123 rc = qed_chain_alloc(p_hwfn->cdev, 1124 QED_CHAIN_USE_TO_CONSUME_PRODUCE, 1125 QED_CHAIN_MODE_PBL, 1126 QED_CHAIN_CNT_TYPE_U16, 1127 p_ll2_info->input.rx_num_desc, 1128 sizeof(struct core_rx_fast_path_cqe), 1129 &p_ll2_info->rx_queue.rcq_chain, NULL); 1130 if (rc) { 1131 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n"); 1132 goto out; 1133 } 1134 1135 DP_VERBOSE(p_hwfn, QED_MSG_LL2, 1136 "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n", 1137 p_ll2_info->input.conn_type, p_ll2_info->input.rx_num_desc); 1138 1139 out: 1140 return rc; 1141 } 1142 1143 static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn, 1144 struct qed_ll2_info *p_ll2_info) 1145 { 1146 struct qed_ll2_tx_packet *p_descq; 1147 u32 desc_size; 1148 u32 capacity; 1149 int rc = 0; 1150 1151 if (!p_ll2_info->input.tx_num_desc) 1152 goto out; 1153 1154 rc = qed_chain_alloc(p_hwfn->cdev, 1155 QED_CHAIN_USE_TO_CONSUME_PRODUCE, 1156 QED_CHAIN_MODE_PBL, 1157 QED_CHAIN_CNT_TYPE_U16, 1158 p_ll2_info->input.tx_num_desc, 1159 sizeof(struct core_tx_bd), 1160 &p_ll2_info->tx_queue.txq_chain, NULL); 1161 if (rc) 1162 goto out; 1163 1164 capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain); 1165 /* First element is part of the packet, rest are flexibly added */ 1166 desc_size = (sizeof(*p_descq) + 1167 (p_ll2_info->input.tx_max_bds_per_packet - 1) * 1168 sizeof(p_descq->bds_set)); 1169 1170 p_descq = kcalloc(capacity, desc_size, GFP_KERNEL); 1171 if (!p_descq) { 1172 rc = -ENOMEM; 1173 goto out; 1174 } 1175 p_ll2_info->tx_queue.descq_mem = p_descq; 1176 1177 DP_VERBOSE(p_hwfn, QED_MSG_LL2, 1178 "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n", 1179 p_ll2_info->input.conn_type, p_ll2_info->input.tx_num_desc); 1180 1181 out: 1182 if (rc) 1183 DP_NOTICE(p_hwfn, 1184 "Can't allocate memory for Tx LL2 with 0x%08x buffers\n", 1185 p_ll2_info->input.tx_num_desc); 1186 return rc; 1187 } 1188 1189 static int 1190 qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn, 1191 struct qed_ll2_info *p_ll2_info, u16 mtu) 1192 { 1193 struct qed_ooo_buffer *p_buf = NULL; 1194 void *p_virt; 1195 u16 buf_idx; 1196 int rc = 0; 1197 1198 if (p_ll2_info->input.conn_type != QED_LL2_TYPE_OOO) 1199 return rc; 1200 1201 /* Correct number of requested OOO buffers if needed */ 1202 if (!p_ll2_info->input.rx_num_ooo_buffers) { 1203 u16 num_desc = p_ll2_info->input.rx_num_desc; 1204 1205 if (!num_desc) 1206 return -EINVAL; 1207 p_ll2_info->input.rx_num_ooo_buffers = num_desc * 2; 1208 } 1209 1210 for (buf_idx = 0; buf_idx < p_ll2_info->input.rx_num_ooo_buffers; 1211 buf_idx++) { 1212 p_buf = kzalloc(sizeof(*p_buf), GFP_KERNEL); 1213 if (!p_buf) { 1214 rc = -ENOMEM; 1215 goto out; 1216 } 1217 1218 p_buf->rx_buffer_size = mtu + 26 + ETH_CACHE_LINE_SIZE; 1219 p_buf->rx_buffer_size = (p_buf->rx_buffer_size + 1220 ETH_CACHE_LINE_SIZE - 1) & 1221 ~(ETH_CACHE_LINE_SIZE - 1); 1222 p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev, 1223 p_buf->rx_buffer_size, 1224 &p_buf->rx_buffer_phys_addr, 1225 GFP_KERNEL); 1226 if (!p_virt) { 1227 kfree(p_buf); 1228 rc = -ENOMEM; 1229 goto out; 1230 } 1231 1232 p_buf->rx_buffer_virt_addr = p_virt; 1233 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buf); 1234 } 1235 1236 DP_VERBOSE(p_hwfn, QED_MSG_LL2, 1237 "Allocated [%04x] LL2 OOO buffers [each of size 0x%08x]\n", 1238 p_ll2_info->input.rx_num_ooo_buffers, p_buf->rx_buffer_size); 1239 1240 out: 1241 return rc; 1242 } 1243 1244 static int 1245 qed_ll2_set_cbs(struct qed_ll2_info *p_ll2_info, const struct qed_ll2_cbs *cbs) 1246 { 1247 if (!cbs || (!cbs->rx_comp_cb || 1248 !cbs->rx_release_cb || 1249 !cbs->tx_comp_cb || !cbs->tx_release_cb || !cbs->cookie)) 1250 return -EINVAL; 1251 1252 p_ll2_info->cbs.rx_comp_cb = cbs->rx_comp_cb; 1253 p_ll2_info->cbs.rx_release_cb = cbs->rx_release_cb; 1254 p_ll2_info->cbs.tx_comp_cb = cbs->tx_comp_cb; 1255 p_ll2_info->cbs.tx_release_cb = cbs->tx_release_cb; 1256 p_ll2_info->cbs.slowpath_cb = cbs->slowpath_cb; 1257 p_ll2_info->cbs.cookie = cbs->cookie; 1258 1259 return 0; 1260 } 1261 1262 static enum core_error_handle 1263 qed_ll2_get_error_choice(enum qed_ll2_error_handle err) 1264 { 1265 switch (err) { 1266 case QED_LL2_DROP_PACKET: 1267 return LL2_DROP_PACKET; 1268 case QED_LL2_DO_NOTHING: 1269 return LL2_DO_NOTHING; 1270 case QED_LL2_ASSERT: 1271 return LL2_ASSERT; 1272 default: 1273 return LL2_DO_NOTHING; 1274 } 1275 } 1276 1277 int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data) 1278 { 1279 struct qed_hwfn *p_hwfn = cxt; 1280 qed_int_comp_cb_t comp_rx_cb, comp_tx_cb; 1281 struct qed_ll2_info *p_ll2_info = NULL; 1282 u8 i, *p_tx_max; 1283 int rc; 1284 1285 if (!data->p_connection_handle || !p_hwfn->p_ll2_info) 1286 return -EINVAL; 1287 1288 /* Find a free connection to be used */ 1289 for (i = 0; (i < QED_MAX_NUM_OF_LL2_CONNECTIONS); i++) { 1290 mutex_lock(&p_hwfn->p_ll2_info[i].mutex); 1291 if (p_hwfn->p_ll2_info[i].b_active) { 1292 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex); 1293 continue; 1294 } 1295 1296 p_hwfn->p_ll2_info[i].b_active = true; 1297 p_ll2_info = &p_hwfn->p_ll2_info[i]; 1298 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex); 1299 break; 1300 } 1301 if (!p_ll2_info) 1302 return -EBUSY; 1303 1304 memcpy(&p_ll2_info->input, &data->input, sizeof(p_ll2_info->input)); 1305 1306 switch (data->input.tx_dest) { 1307 case QED_LL2_TX_DEST_NW: 1308 p_ll2_info->tx_dest = CORE_TX_DEST_NW; 1309 break; 1310 case QED_LL2_TX_DEST_LB: 1311 p_ll2_info->tx_dest = CORE_TX_DEST_LB; 1312 break; 1313 case QED_LL2_TX_DEST_DROP: 1314 p_ll2_info->tx_dest = CORE_TX_DEST_DROP; 1315 break; 1316 default: 1317 return -EINVAL; 1318 } 1319 1320 if (data->input.conn_type == QED_LL2_TYPE_OOO || 1321 data->input.secondary_queue) 1322 p_ll2_info->main_func_queue = false; 1323 else 1324 p_ll2_info->main_func_queue = true; 1325 1326 /* Correct maximum number of Tx BDs */ 1327 p_tx_max = &p_ll2_info->input.tx_max_bds_per_packet; 1328 if (*p_tx_max == 0) 1329 *p_tx_max = CORE_LL2_TX_MAX_BDS_PER_PACKET; 1330 else 1331 *p_tx_max = min_t(u8, *p_tx_max, 1332 CORE_LL2_TX_MAX_BDS_PER_PACKET); 1333 1334 rc = qed_ll2_set_cbs(p_ll2_info, data->cbs); 1335 if (rc) { 1336 DP_NOTICE(p_hwfn, "Invalid callback functions\n"); 1337 goto q_allocate_fail; 1338 } 1339 1340 rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info); 1341 if (rc) 1342 goto q_allocate_fail; 1343 1344 rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info); 1345 if (rc) 1346 goto q_allocate_fail; 1347 1348 rc = qed_ll2_acquire_connection_ooo(p_hwfn, p_ll2_info, 1349 data->input.mtu); 1350 if (rc) 1351 goto q_allocate_fail; 1352 1353 /* Register callbacks for the Rx/Tx queues */ 1354 if (data->input.conn_type == QED_LL2_TYPE_OOO) { 1355 comp_rx_cb = qed_ll2_lb_rxq_completion; 1356 comp_tx_cb = qed_ll2_lb_txq_completion; 1357 } else { 1358 comp_rx_cb = qed_ll2_rxq_completion; 1359 comp_tx_cb = qed_ll2_txq_completion; 1360 } 1361 1362 if (data->input.rx_num_desc) { 1363 qed_int_register_cb(p_hwfn, comp_rx_cb, 1364 &p_hwfn->p_ll2_info[i], 1365 &p_ll2_info->rx_queue.rx_sb_index, 1366 &p_ll2_info->rx_queue.p_fw_cons); 1367 p_ll2_info->rx_queue.b_cb_registred = true; 1368 } 1369 1370 if (data->input.tx_num_desc) { 1371 qed_int_register_cb(p_hwfn, 1372 comp_tx_cb, 1373 &p_hwfn->p_ll2_info[i], 1374 &p_ll2_info->tx_queue.tx_sb_index, 1375 &p_ll2_info->tx_queue.p_fw_cons); 1376 p_ll2_info->tx_queue.b_cb_registred = true; 1377 } 1378 1379 *data->p_connection_handle = i; 1380 return rc; 1381 1382 q_allocate_fail: 1383 qed_ll2_release_connection(p_hwfn, i); 1384 return -ENOMEM; 1385 } 1386 1387 static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn, 1388 struct qed_ll2_info *p_ll2_conn) 1389 { 1390 enum qed_ll2_error_handle error_input; 1391 enum core_error_handle error_mode; 1392 u8 action_on_error = 0; 1393 1394 if (!QED_LL2_RX_REGISTERED(p_ll2_conn)) 1395 return 0; 1396 1397 DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0); 1398 error_input = p_ll2_conn->input.ai_err_packet_too_big; 1399 error_mode = qed_ll2_get_error_choice(error_input); 1400 SET_FIELD(action_on_error, 1401 CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, error_mode); 1402 error_input = p_ll2_conn->input.ai_err_no_buf; 1403 error_mode = qed_ll2_get_error_choice(error_input); 1404 SET_FIELD(action_on_error, CORE_RX_ACTION_ON_ERROR_NO_BUFF, error_mode); 1405 1406 return qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error); 1407 } 1408 1409 static void 1410 qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn, 1411 struct qed_ll2_info *p_ll2_conn) 1412 { 1413 if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO) 1414 return; 1415 1416 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info); 1417 qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn); 1418 } 1419 1420 int qed_ll2_establish_connection(void *cxt, u8 connection_handle) 1421 { 1422 struct qed_hwfn *p_hwfn = cxt; 1423 struct qed_ll2_info *p_ll2_conn; 1424 struct qed_ll2_tx_packet *p_pkt; 1425 struct qed_ll2_rx_queue *p_rx; 1426 struct qed_ll2_tx_queue *p_tx; 1427 struct qed_ptt *p_ptt; 1428 int rc = -EINVAL; 1429 u32 i, capacity; 1430 u32 desc_size; 1431 u8 qid; 1432 1433 p_ptt = qed_ptt_acquire(p_hwfn); 1434 if (!p_ptt) 1435 return -EAGAIN; 1436 1437 p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle); 1438 if (!p_ll2_conn) { 1439 rc = -EINVAL; 1440 goto out; 1441 } 1442 1443 p_rx = &p_ll2_conn->rx_queue; 1444 p_tx = &p_ll2_conn->tx_queue; 1445 1446 qed_chain_reset(&p_rx->rxq_chain); 1447 qed_chain_reset(&p_rx->rcq_chain); 1448 INIT_LIST_HEAD(&p_rx->active_descq); 1449 INIT_LIST_HEAD(&p_rx->free_descq); 1450 INIT_LIST_HEAD(&p_rx->posting_descq); 1451 spin_lock_init(&p_rx->lock); 1452 capacity = qed_chain_get_capacity(&p_rx->rxq_chain); 1453 for (i = 0; i < capacity; i++) 1454 list_add_tail(&p_rx->descq_array[i].list_entry, 1455 &p_rx->free_descq); 1456 *p_rx->p_fw_cons = 0; 1457 1458 qed_chain_reset(&p_tx->txq_chain); 1459 INIT_LIST_HEAD(&p_tx->active_descq); 1460 INIT_LIST_HEAD(&p_tx->free_descq); 1461 INIT_LIST_HEAD(&p_tx->sending_descq); 1462 spin_lock_init(&p_tx->lock); 1463 capacity = qed_chain_get_capacity(&p_tx->txq_chain); 1464 /* First element is part of the packet, rest are flexibly added */ 1465 desc_size = (sizeof(*p_pkt) + 1466 (p_ll2_conn->input.tx_max_bds_per_packet - 1) * 1467 sizeof(p_pkt->bds_set)); 1468 1469 for (i = 0; i < capacity; i++) { 1470 p_pkt = p_tx->descq_mem + desc_size * i; 1471 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq); 1472 } 1473 p_tx->cur_completing_bd_idx = 0; 1474 p_tx->bds_idx = 0; 1475 p_tx->b_completing_packet = false; 1476 p_tx->cur_send_packet = NULL; 1477 p_tx->cur_send_frag_num = 0; 1478 p_tx->cur_completing_frag_num = 0; 1479 *p_tx->p_fw_cons = 0; 1480 1481 rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid); 1482 if (rc) 1483 goto out; 1484 1485 qid = p_hwfn->hw_info.resc_start[QED_LL2_QUEUE] + connection_handle; 1486 p_ll2_conn->queue_id = qid; 1487 p_ll2_conn->tx_stats_id = qid; 1488 p_rx->set_prod_addr = (u8 __iomem *)p_hwfn->regview + 1489 GTT_BAR0_MAP_REG_TSDM_RAM + 1490 TSTORM_LL2_RX_PRODS_OFFSET(qid); 1491 p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells + 1492 qed_db_addr(p_ll2_conn->cid, 1493 DQ_DEMS_LEGACY); 1494 1495 rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn); 1496 if (rc) 1497 goto out; 1498 1499 rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn); 1500 if (rc) 1501 goto out; 1502 1503 if (!QED_IS_RDMA_PERSONALITY(p_hwfn)) 1504 qed_wr(p_hwfn, p_ptt, PRS_REG_USE_LIGHT_L2, 1); 1505 1506 qed_ll2_establish_connection_ooo(p_hwfn, p_ll2_conn); 1507 1508 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) { 1509 qed_llh_add_protocol_filter(p_hwfn, p_ptt, 1510 0x8906, 0, 1511 QED_LLH_FILTER_ETHERTYPE); 1512 qed_llh_add_protocol_filter(p_hwfn, p_ptt, 1513 0x8914, 0, 1514 QED_LLH_FILTER_ETHERTYPE); 1515 } 1516 1517 out: 1518 qed_ptt_release(p_hwfn, p_ptt); 1519 return rc; 1520 } 1521 1522 static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn, 1523 struct qed_ll2_rx_queue *p_rx, 1524 struct qed_ll2_rx_packet *p_curp) 1525 { 1526 struct qed_ll2_rx_packet *p_posting_packet = NULL; 1527 struct core_ll2_rx_prod rx_prod = { 0, 0, 0 }; 1528 bool b_notify_fw = false; 1529 u16 bd_prod, cq_prod; 1530 1531 /* This handles the flushing of already posted buffers */ 1532 while (!list_empty(&p_rx->posting_descq)) { 1533 p_posting_packet = list_first_entry(&p_rx->posting_descq, 1534 struct qed_ll2_rx_packet, 1535 list_entry); 1536 list_move_tail(&p_posting_packet->list_entry, 1537 &p_rx->active_descq); 1538 b_notify_fw = true; 1539 } 1540 1541 /* This handles the supplied packet [if there is one] */ 1542 if (p_curp) { 1543 list_add_tail(&p_curp->list_entry, &p_rx->active_descq); 1544 b_notify_fw = true; 1545 } 1546 1547 if (!b_notify_fw) 1548 return; 1549 1550 bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain); 1551 cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain); 1552 rx_prod.bd_prod = cpu_to_le16(bd_prod); 1553 rx_prod.cqe_prod = cpu_to_le16(cq_prod); 1554 DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod)); 1555 } 1556 1557 int qed_ll2_post_rx_buffer(void *cxt, 1558 u8 connection_handle, 1559 dma_addr_t addr, 1560 u16 buf_len, void *cookie, u8 notify_fw) 1561 { 1562 struct qed_hwfn *p_hwfn = cxt; 1563 struct core_rx_bd_with_buff_len *p_curb = NULL; 1564 struct qed_ll2_rx_packet *p_curp = NULL; 1565 struct qed_ll2_info *p_ll2_conn; 1566 struct qed_ll2_rx_queue *p_rx; 1567 unsigned long flags; 1568 void *p_data; 1569 int rc = 0; 1570 1571 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); 1572 if (!p_ll2_conn) 1573 return -EINVAL; 1574 p_rx = &p_ll2_conn->rx_queue; 1575 1576 spin_lock_irqsave(&p_rx->lock, flags); 1577 if (!list_empty(&p_rx->free_descq)) 1578 p_curp = list_first_entry(&p_rx->free_descq, 1579 struct qed_ll2_rx_packet, list_entry); 1580 if (p_curp) { 1581 if (qed_chain_get_elem_left(&p_rx->rxq_chain) && 1582 qed_chain_get_elem_left(&p_rx->rcq_chain)) { 1583 p_data = qed_chain_produce(&p_rx->rxq_chain); 1584 p_curb = (struct core_rx_bd_with_buff_len *)p_data; 1585 qed_chain_produce(&p_rx->rcq_chain); 1586 } 1587 } 1588 1589 /* If we're lacking entires, let's try to flush buffers to FW */ 1590 if (!p_curp || !p_curb) { 1591 rc = -EBUSY; 1592 p_curp = NULL; 1593 goto out_notify; 1594 } 1595 1596 /* We have an Rx packet we can fill */ 1597 DMA_REGPAIR_LE(p_curb->addr, addr); 1598 p_curb->buff_length = cpu_to_le16(buf_len); 1599 p_curp->rx_buf_addr = addr; 1600 p_curp->cookie = cookie; 1601 p_curp->rxq_bd = p_curb; 1602 p_curp->buf_length = buf_len; 1603 list_del(&p_curp->list_entry); 1604 1605 /* Check if we only want to enqueue this packet without informing FW */ 1606 if (!notify_fw) { 1607 list_add_tail(&p_curp->list_entry, &p_rx->posting_descq); 1608 goto out; 1609 } 1610 1611 out_notify: 1612 qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp); 1613 out: 1614 spin_unlock_irqrestore(&p_rx->lock, flags); 1615 return rc; 1616 } 1617 1618 static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn, 1619 struct qed_ll2_tx_queue *p_tx, 1620 struct qed_ll2_tx_packet *p_curp, 1621 struct qed_ll2_tx_pkt_info *pkt, 1622 u8 notify_fw) 1623 { 1624 list_del(&p_curp->list_entry); 1625 p_curp->cookie = pkt->cookie; 1626 p_curp->bd_used = pkt->num_of_bds; 1627 p_curp->notify_fw = notify_fw; 1628 p_tx->cur_send_packet = p_curp; 1629 p_tx->cur_send_frag_num = 0; 1630 1631 p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = pkt->first_frag; 1632 p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = pkt->first_frag_len; 1633 p_tx->cur_send_frag_num++; 1634 } 1635 1636 static void 1637 qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn, 1638 struct qed_ll2_info *p_ll2, 1639 struct qed_ll2_tx_packet *p_curp, 1640 struct qed_ll2_tx_pkt_info *pkt) 1641 { 1642 struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain; 1643 u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain); 1644 struct core_tx_bd *start_bd = NULL; 1645 enum core_roce_flavor_type roce_flavor; 1646 enum core_tx_dest tx_dest; 1647 u16 bd_data = 0, frag_idx; 1648 1649 roce_flavor = (pkt->qed_roce_flavor == QED_LL2_ROCE) ? CORE_ROCE 1650 : CORE_RROCE; 1651 1652 switch (pkt->tx_dest) { 1653 case QED_LL2_TX_DEST_NW: 1654 tx_dest = CORE_TX_DEST_NW; 1655 break; 1656 case QED_LL2_TX_DEST_LB: 1657 tx_dest = CORE_TX_DEST_LB; 1658 break; 1659 case QED_LL2_TX_DEST_DROP: 1660 tx_dest = CORE_TX_DEST_DROP; 1661 break; 1662 default: 1663 tx_dest = CORE_TX_DEST_LB; 1664 break; 1665 } 1666 1667 start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain); 1668 if (QED_IS_IWARP_PERSONALITY(p_hwfn) && 1669 p_ll2->input.conn_type == QED_LL2_TYPE_OOO) 1670 start_bd->nw_vlan_or_lb_echo = 1671 cpu_to_le16(IWARP_LL2_IN_ORDER_TX_QUEUE); 1672 else 1673 start_bd->nw_vlan_or_lb_echo = cpu_to_le16(pkt->vlan); 1674 SET_FIELD(start_bd->bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W, 1675 cpu_to_le16(pkt->l4_hdr_offset_w)); 1676 SET_FIELD(start_bd->bitfield1, CORE_TX_BD_TX_DST, tx_dest); 1677 bd_data |= pkt->bd_flags; 1678 SET_FIELD(bd_data, CORE_TX_BD_DATA_START_BD, 0x1); 1679 SET_FIELD(bd_data, CORE_TX_BD_DATA_NBDS, pkt->num_of_bds); 1680 SET_FIELD(bd_data, CORE_TX_BD_DATA_ROCE_FLAV, roce_flavor); 1681 SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_CSUM, !!(pkt->enable_ip_cksum)); 1682 SET_FIELD(bd_data, CORE_TX_BD_DATA_L4_CSUM, !!(pkt->enable_l4_cksum)); 1683 SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_LEN, !!(pkt->calc_ip_len)); 1684 start_bd->bd_data.as_bitfield = cpu_to_le16(bd_data); 1685 DMA_REGPAIR_LE(start_bd->addr, pkt->first_frag); 1686 start_bd->nbytes = cpu_to_le16(pkt->first_frag_len); 1687 1688 DP_VERBOSE(p_hwfn, 1689 (NETIF_MSG_TX_QUEUED | QED_MSG_LL2), 1690 "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Tx Producer at [0x%04x] - set with a %04x bytes %02x BDs buffer at %08x:%08x\n", 1691 p_ll2->queue_id, 1692 p_ll2->cid, 1693 p_ll2->input.conn_type, 1694 prod_idx, 1695 pkt->first_frag_len, 1696 pkt->num_of_bds, 1697 le32_to_cpu(start_bd->addr.hi), 1698 le32_to_cpu(start_bd->addr.lo)); 1699 1700 if (p_ll2->tx_queue.cur_send_frag_num == pkt->num_of_bds) 1701 return; 1702 1703 /* Need to provide the packet with additional BDs for frags */ 1704 for (frag_idx = p_ll2->tx_queue.cur_send_frag_num; 1705 frag_idx < pkt->num_of_bds; frag_idx++) { 1706 struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd; 1707 1708 *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain); 1709 (*p_bd)->bd_data.as_bitfield = 0; 1710 (*p_bd)->bitfield1 = 0; 1711 p_curp->bds_set[frag_idx].tx_frag = 0; 1712 p_curp->bds_set[frag_idx].frag_len = 0; 1713 } 1714 } 1715 1716 /* This should be called while the Txq spinlock is being held */ 1717 static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn, 1718 struct qed_ll2_info *p_ll2_conn) 1719 { 1720 bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw; 1721 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; 1722 struct qed_ll2_tx_packet *p_pkt = NULL; 1723 struct core_db_data db_msg = { 0, 0, 0 }; 1724 u16 bd_prod; 1725 1726 /* If there are missing BDs, don't do anything now */ 1727 if (p_ll2_conn->tx_queue.cur_send_frag_num != 1728 p_ll2_conn->tx_queue.cur_send_packet->bd_used) 1729 return; 1730 1731 /* Push the current packet to the list and clean after it */ 1732 list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry, 1733 &p_ll2_conn->tx_queue.sending_descq); 1734 p_ll2_conn->tx_queue.cur_send_packet = NULL; 1735 p_ll2_conn->tx_queue.cur_send_frag_num = 0; 1736 1737 /* Notify FW of packet only if requested to */ 1738 if (!b_notify) 1739 return; 1740 1741 bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain); 1742 1743 while (!list_empty(&p_tx->sending_descq)) { 1744 p_pkt = list_first_entry(&p_tx->sending_descq, 1745 struct qed_ll2_tx_packet, list_entry); 1746 if (!p_pkt) 1747 break; 1748 1749 list_move_tail(&p_pkt->list_entry, &p_tx->active_descq); 1750 } 1751 1752 SET_FIELD(db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM); 1753 SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET); 1754 SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_VAL_SEL, 1755 DQ_XCM_CORE_TX_BD_PROD_CMD); 1756 db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD; 1757 db_msg.spq_prod = cpu_to_le16(bd_prod); 1758 1759 /* Make sure the BDs data is updated before ringing the doorbell */ 1760 wmb(); 1761 1762 DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&db_msg)); 1763 1764 DP_VERBOSE(p_hwfn, 1765 (NETIF_MSG_TX_QUEUED | QED_MSG_LL2), 1766 "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n", 1767 p_ll2_conn->queue_id, 1768 p_ll2_conn->cid, 1769 p_ll2_conn->input.conn_type, db_msg.spq_prod); 1770 } 1771 1772 int qed_ll2_prepare_tx_packet(void *cxt, 1773 u8 connection_handle, 1774 struct qed_ll2_tx_pkt_info *pkt, 1775 bool notify_fw) 1776 { 1777 struct qed_hwfn *p_hwfn = cxt; 1778 struct qed_ll2_tx_packet *p_curp = NULL; 1779 struct qed_ll2_info *p_ll2_conn = NULL; 1780 struct qed_ll2_tx_queue *p_tx; 1781 struct qed_chain *p_tx_chain; 1782 unsigned long flags; 1783 int rc = 0; 1784 1785 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); 1786 if (!p_ll2_conn) 1787 return -EINVAL; 1788 p_tx = &p_ll2_conn->tx_queue; 1789 p_tx_chain = &p_tx->txq_chain; 1790 1791 if (pkt->num_of_bds > p_ll2_conn->input.tx_max_bds_per_packet) 1792 return -EIO; 1793 1794 spin_lock_irqsave(&p_tx->lock, flags); 1795 if (p_tx->cur_send_packet) { 1796 rc = -EEXIST; 1797 goto out; 1798 } 1799 1800 /* Get entry, but only if we have tx elements for it */ 1801 if (!list_empty(&p_tx->free_descq)) 1802 p_curp = list_first_entry(&p_tx->free_descq, 1803 struct qed_ll2_tx_packet, list_entry); 1804 if (p_curp && qed_chain_get_elem_left(p_tx_chain) < pkt->num_of_bds) 1805 p_curp = NULL; 1806 1807 if (!p_curp) { 1808 rc = -EBUSY; 1809 goto out; 1810 } 1811 1812 /* Prepare packet and BD, and perhaps send a doorbell to FW */ 1813 qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp, pkt, notify_fw); 1814 1815 qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp, pkt); 1816 1817 qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn); 1818 1819 out: 1820 spin_unlock_irqrestore(&p_tx->lock, flags); 1821 return rc; 1822 } 1823 1824 int qed_ll2_set_fragment_of_tx_packet(void *cxt, 1825 u8 connection_handle, 1826 dma_addr_t addr, u16 nbytes) 1827 { 1828 struct qed_ll2_tx_packet *p_cur_send_packet = NULL; 1829 struct qed_hwfn *p_hwfn = cxt; 1830 struct qed_ll2_info *p_ll2_conn = NULL; 1831 u16 cur_send_frag_num = 0; 1832 struct core_tx_bd *p_bd; 1833 unsigned long flags; 1834 1835 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); 1836 if (!p_ll2_conn) 1837 return -EINVAL; 1838 1839 if (!p_ll2_conn->tx_queue.cur_send_packet) 1840 return -EINVAL; 1841 1842 p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet; 1843 cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num; 1844 1845 if (cur_send_frag_num >= p_cur_send_packet->bd_used) 1846 return -EINVAL; 1847 1848 /* Fill the BD information, and possibly notify FW */ 1849 p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd; 1850 DMA_REGPAIR_LE(p_bd->addr, addr); 1851 p_bd->nbytes = cpu_to_le16(nbytes); 1852 p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr; 1853 p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes; 1854 1855 p_ll2_conn->tx_queue.cur_send_frag_num++; 1856 1857 spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags); 1858 qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn); 1859 spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags); 1860 1861 return 0; 1862 } 1863 1864 int qed_ll2_terminate_connection(void *cxt, u8 connection_handle) 1865 { 1866 struct qed_hwfn *p_hwfn = cxt; 1867 struct qed_ll2_info *p_ll2_conn = NULL; 1868 int rc = -EINVAL; 1869 struct qed_ptt *p_ptt; 1870 1871 p_ptt = qed_ptt_acquire(p_hwfn); 1872 if (!p_ptt) 1873 return -EAGAIN; 1874 1875 p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle); 1876 if (!p_ll2_conn) { 1877 rc = -EINVAL; 1878 goto out; 1879 } 1880 1881 /* Stop Tx & Rx of connection, if needed */ 1882 if (QED_LL2_TX_REGISTERED(p_ll2_conn)) { 1883 rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn); 1884 if (rc) 1885 goto out; 1886 qed_ll2_txq_flush(p_hwfn, connection_handle); 1887 } 1888 1889 if (QED_LL2_RX_REGISTERED(p_ll2_conn)) { 1890 rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn); 1891 if (rc) 1892 goto out; 1893 qed_ll2_rxq_flush(p_hwfn, connection_handle); 1894 } 1895 1896 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) 1897 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info); 1898 1899 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) { 1900 qed_llh_remove_protocol_filter(p_hwfn, p_ptt, 1901 0x8906, 0, 1902 QED_LLH_FILTER_ETHERTYPE); 1903 qed_llh_remove_protocol_filter(p_hwfn, p_ptt, 1904 0x8914, 0, 1905 QED_LLH_FILTER_ETHERTYPE); 1906 } 1907 1908 out: 1909 qed_ptt_release(p_hwfn, p_ptt); 1910 return rc; 1911 } 1912 1913 static void qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn, 1914 struct qed_ll2_info *p_ll2_conn) 1915 { 1916 struct qed_ooo_buffer *p_buffer; 1917 1918 if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO) 1919 return; 1920 1921 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info); 1922 while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn, 1923 p_hwfn->p_ooo_info))) { 1924 dma_free_coherent(&p_hwfn->cdev->pdev->dev, 1925 p_buffer->rx_buffer_size, 1926 p_buffer->rx_buffer_virt_addr, 1927 p_buffer->rx_buffer_phys_addr); 1928 kfree(p_buffer); 1929 } 1930 } 1931 1932 void qed_ll2_release_connection(void *cxt, u8 connection_handle) 1933 { 1934 struct qed_hwfn *p_hwfn = cxt; 1935 struct qed_ll2_info *p_ll2_conn = NULL; 1936 1937 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); 1938 if (!p_ll2_conn) 1939 return; 1940 1941 if (QED_LL2_RX_REGISTERED(p_ll2_conn)) { 1942 p_ll2_conn->rx_queue.b_cb_registred = false; 1943 qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index); 1944 } 1945 1946 if (QED_LL2_TX_REGISTERED(p_ll2_conn)) { 1947 p_ll2_conn->tx_queue.b_cb_registred = false; 1948 qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index); 1949 } 1950 1951 kfree(p_ll2_conn->tx_queue.descq_mem); 1952 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain); 1953 1954 kfree(p_ll2_conn->rx_queue.descq_array); 1955 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain); 1956 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain); 1957 1958 qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid); 1959 1960 qed_ll2_release_connection_ooo(p_hwfn, p_ll2_conn); 1961 1962 mutex_lock(&p_ll2_conn->mutex); 1963 p_ll2_conn->b_active = false; 1964 mutex_unlock(&p_ll2_conn->mutex); 1965 } 1966 1967 int qed_ll2_alloc(struct qed_hwfn *p_hwfn) 1968 { 1969 struct qed_ll2_info *p_ll2_connections; 1970 u8 i; 1971 1972 /* Allocate LL2's set struct */ 1973 p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS, 1974 sizeof(struct qed_ll2_info), GFP_KERNEL); 1975 if (!p_ll2_connections) { 1976 DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n"); 1977 return -ENOMEM; 1978 } 1979 1980 for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++) 1981 p_ll2_connections[i].my_id = i; 1982 1983 p_hwfn->p_ll2_info = p_ll2_connections; 1984 return 0; 1985 } 1986 1987 void qed_ll2_setup(struct qed_hwfn *p_hwfn) 1988 { 1989 int i; 1990 1991 for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++) 1992 mutex_init(&p_hwfn->p_ll2_info[i].mutex); 1993 } 1994 1995 void qed_ll2_free(struct qed_hwfn *p_hwfn) 1996 { 1997 if (!p_hwfn->p_ll2_info) 1998 return; 1999 2000 kfree(p_hwfn->p_ll2_info); 2001 p_hwfn->p_ll2_info = NULL; 2002 } 2003 2004 static void _qed_ll2_get_port_stats(struct qed_hwfn *p_hwfn, 2005 struct qed_ptt *p_ptt, 2006 struct qed_ll2_stats *p_stats) 2007 { 2008 struct core_ll2_port_stats port_stats; 2009 2010 memset(&port_stats, 0, sizeof(port_stats)); 2011 qed_memcpy_from(p_hwfn, p_ptt, &port_stats, 2012 BAR0_MAP_REG_TSDM_RAM + 2013 TSTORM_LL2_PORT_STAT_OFFSET(MFW_PORT(p_hwfn)), 2014 sizeof(port_stats)); 2015 2016 p_stats->gsi_invalid_hdr = HILO_64_REGPAIR(port_stats.gsi_invalid_hdr); 2017 p_stats->gsi_invalid_pkt_length = 2018 HILO_64_REGPAIR(port_stats.gsi_invalid_pkt_length); 2019 p_stats->gsi_unsupported_pkt_typ = 2020 HILO_64_REGPAIR(port_stats.gsi_unsupported_pkt_typ); 2021 p_stats->gsi_crcchksm_error = 2022 HILO_64_REGPAIR(port_stats.gsi_crcchksm_error); 2023 } 2024 2025 static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn, 2026 struct qed_ptt *p_ptt, 2027 struct qed_ll2_info *p_ll2_conn, 2028 struct qed_ll2_stats *p_stats) 2029 { 2030 struct core_ll2_tstorm_per_queue_stat tstats; 2031 u8 qid = p_ll2_conn->queue_id; 2032 u32 tstats_addr; 2033 2034 memset(&tstats, 0, sizeof(tstats)); 2035 tstats_addr = BAR0_MAP_REG_TSDM_RAM + 2036 CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid); 2037 qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats)); 2038 2039 p_stats->packet_too_big_discard = 2040 HILO_64_REGPAIR(tstats.packet_too_big_discard); 2041 p_stats->no_buff_discard = HILO_64_REGPAIR(tstats.no_buff_discard); 2042 } 2043 2044 static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn, 2045 struct qed_ptt *p_ptt, 2046 struct qed_ll2_info *p_ll2_conn, 2047 struct qed_ll2_stats *p_stats) 2048 { 2049 struct core_ll2_ustorm_per_queue_stat ustats; 2050 u8 qid = p_ll2_conn->queue_id; 2051 u32 ustats_addr; 2052 2053 memset(&ustats, 0, sizeof(ustats)); 2054 ustats_addr = BAR0_MAP_REG_USDM_RAM + 2055 CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid); 2056 qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats)); 2057 2058 p_stats->rcv_ucast_bytes = HILO_64_REGPAIR(ustats.rcv_ucast_bytes); 2059 p_stats->rcv_mcast_bytes = HILO_64_REGPAIR(ustats.rcv_mcast_bytes); 2060 p_stats->rcv_bcast_bytes = HILO_64_REGPAIR(ustats.rcv_bcast_bytes); 2061 p_stats->rcv_ucast_pkts = HILO_64_REGPAIR(ustats.rcv_ucast_pkts); 2062 p_stats->rcv_mcast_pkts = HILO_64_REGPAIR(ustats.rcv_mcast_pkts); 2063 p_stats->rcv_bcast_pkts = HILO_64_REGPAIR(ustats.rcv_bcast_pkts); 2064 } 2065 2066 static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn, 2067 struct qed_ptt *p_ptt, 2068 struct qed_ll2_info *p_ll2_conn, 2069 struct qed_ll2_stats *p_stats) 2070 { 2071 struct core_ll2_pstorm_per_queue_stat pstats; 2072 u8 stats_id = p_ll2_conn->tx_stats_id; 2073 u32 pstats_addr; 2074 2075 memset(&pstats, 0, sizeof(pstats)); 2076 pstats_addr = BAR0_MAP_REG_PSDM_RAM + 2077 CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id); 2078 qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats)); 2079 2080 p_stats->sent_ucast_bytes = HILO_64_REGPAIR(pstats.sent_ucast_bytes); 2081 p_stats->sent_mcast_bytes = HILO_64_REGPAIR(pstats.sent_mcast_bytes); 2082 p_stats->sent_bcast_bytes = HILO_64_REGPAIR(pstats.sent_bcast_bytes); 2083 p_stats->sent_ucast_pkts = HILO_64_REGPAIR(pstats.sent_ucast_pkts); 2084 p_stats->sent_mcast_pkts = HILO_64_REGPAIR(pstats.sent_mcast_pkts); 2085 p_stats->sent_bcast_pkts = HILO_64_REGPAIR(pstats.sent_bcast_pkts); 2086 } 2087 2088 int qed_ll2_get_stats(void *cxt, 2089 u8 connection_handle, struct qed_ll2_stats *p_stats) 2090 { 2091 struct qed_hwfn *p_hwfn = cxt; 2092 struct qed_ll2_info *p_ll2_conn = NULL; 2093 struct qed_ptt *p_ptt; 2094 2095 memset(p_stats, 0, sizeof(*p_stats)); 2096 2097 if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) || 2098 !p_hwfn->p_ll2_info) 2099 return -EINVAL; 2100 2101 p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle]; 2102 2103 p_ptt = qed_ptt_acquire(p_hwfn); 2104 if (!p_ptt) { 2105 DP_ERR(p_hwfn, "Failed to acquire ptt\n"); 2106 return -EINVAL; 2107 } 2108 2109 if (p_ll2_conn->input.gsi_enable) 2110 _qed_ll2_get_port_stats(p_hwfn, p_ptt, p_stats); 2111 _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats); 2112 _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats); 2113 if (p_ll2_conn->tx_stats_en) 2114 _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats); 2115 2116 qed_ptt_release(p_hwfn, p_ptt); 2117 return 0; 2118 } 2119 2120 static void qed_ll2b_release_rx_packet(void *cxt, 2121 u8 connection_handle, 2122 void *cookie, 2123 dma_addr_t rx_buf_addr, 2124 bool b_last_packet) 2125 { 2126 struct qed_hwfn *p_hwfn = cxt; 2127 2128 qed_ll2_dealloc_buffer(p_hwfn->cdev, cookie); 2129 } 2130 2131 static void qed_ll2_register_cb_ops(struct qed_dev *cdev, 2132 const struct qed_ll2_cb_ops *ops, 2133 void *cookie) 2134 { 2135 cdev->ll2->cbs = ops; 2136 cdev->ll2->cb_cookie = cookie; 2137 } 2138 2139 struct qed_ll2_cbs ll2_cbs = { 2140 .rx_comp_cb = &qed_ll2b_complete_rx_packet, 2141 .rx_release_cb = &qed_ll2b_release_rx_packet, 2142 .tx_comp_cb = &qed_ll2b_complete_tx_packet, 2143 .tx_release_cb = &qed_ll2b_complete_tx_packet, 2144 }; 2145 2146 static void qed_ll2_set_conn_data(struct qed_dev *cdev, 2147 struct qed_ll2_acquire_data *data, 2148 struct qed_ll2_params *params, 2149 enum qed_ll2_conn_type conn_type, 2150 u8 *handle, bool lb) 2151 { 2152 memset(data, 0, sizeof(*data)); 2153 2154 data->input.conn_type = conn_type; 2155 data->input.mtu = params->mtu; 2156 data->input.rx_num_desc = QED_LL2_RX_SIZE; 2157 data->input.rx_drop_ttl0_flg = params->drop_ttl0_packets; 2158 data->input.rx_vlan_removal_en = params->rx_vlan_stripping; 2159 data->input.tx_num_desc = QED_LL2_TX_SIZE; 2160 data->p_connection_handle = handle; 2161 data->cbs = &ll2_cbs; 2162 ll2_cbs.cookie = QED_LEADING_HWFN(cdev); 2163 2164 if (lb) { 2165 data->input.tx_tc = PKT_LB_TC; 2166 data->input.tx_dest = QED_LL2_TX_DEST_LB; 2167 } else { 2168 data->input.tx_tc = 0; 2169 data->input.tx_dest = QED_LL2_TX_DEST_NW; 2170 } 2171 } 2172 2173 static int qed_ll2_start_ooo(struct qed_dev *cdev, 2174 struct qed_ll2_params *params) 2175 { 2176 struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev); 2177 u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id; 2178 struct qed_ll2_acquire_data data; 2179 int rc; 2180 2181 qed_ll2_set_conn_data(cdev, &data, params, 2182 QED_LL2_TYPE_OOO, handle, true); 2183 2184 rc = qed_ll2_acquire_connection(hwfn, &data); 2185 if (rc) { 2186 DP_INFO(cdev, "Failed to acquire LL2 OOO connection\n"); 2187 goto out; 2188 } 2189 2190 rc = qed_ll2_establish_connection(hwfn, *handle); 2191 if (rc) { 2192 DP_INFO(cdev, "Failed to establist LL2 OOO connection\n"); 2193 goto fail; 2194 } 2195 2196 return 0; 2197 2198 fail: 2199 qed_ll2_release_connection(hwfn, *handle); 2200 out: 2201 *handle = QED_LL2_UNUSED_HANDLE; 2202 return rc; 2203 } 2204 2205 static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params) 2206 { 2207 struct qed_ll2_buffer *buffer, *tmp_buffer; 2208 enum qed_ll2_conn_type conn_type; 2209 struct qed_ll2_acquire_data data; 2210 struct qed_ptt *p_ptt; 2211 int rc, i; 2212 2213 2214 /* Initialize LL2 locks & lists */ 2215 INIT_LIST_HEAD(&cdev->ll2->list); 2216 spin_lock_init(&cdev->ll2->lock); 2217 cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN + 2218 L1_CACHE_BYTES + params->mtu; 2219 2220 /*Allocate memory for LL2 */ 2221 DP_INFO(cdev, "Allocating LL2 buffers of size %08x bytes\n", 2222 cdev->ll2->rx_size); 2223 for (i = 0; i < QED_LL2_RX_SIZE; i++) { 2224 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL); 2225 if (!buffer) { 2226 DP_INFO(cdev, "Failed to allocate LL2 buffers\n"); 2227 goto fail; 2228 } 2229 2230 rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data, 2231 &buffer->phys_addr); 2232 if (rc) { 2233 kfree(buffer); 2234 goto fail; 2235 } 2236 2237 list_add_tail(&buffer->list, &cdev->ll2->list); 2238 } 2239 2240 switch (QED_LEADING_HWFN(cdev)->hw_info.personality) { 2241 case QED_PCI_FCOE: 2242 conn_type = QED_LL2_TYPE_FCOE; 2243 break; 2244 case QED_PCI_ISCSI: 2245 conn_type = QED_LL2_TYPE_ISCSI; 2246 break; 2247 case QED_PCI_ETH_ROCE: 2248 conn_type = QED_LL2_TYPE_ROCE; 2249 break; 2250 default: 2251 conn_type = QED_LL2_TYPE_TEST; 2252 } 2253 2254 qed_ll2_set_conn_data(cdev, &data, params, conn_type, 2255 &cdev->ll2->handle, false); 2256 2257 rc = qed_ll2_acquire_connection(QED_LEADING_HWFN(cdev), &data); 2258 if (rc) { 2259 DP_INFO(cdev, "Failed to acquire LL2 connection\n"); 2260 goto fail; 2261 } 2262 2263 rc = qed_ll2_establish_connection(QED_LEADING_HWFN(cdev), 2264 cdev->ll2->handle); 2265 if (rc) { 2266 DP_INFO(cdev, "Failed to establish LL2 connection\n"); 2267 goto release_fail; 2268 } 2269 2270 /* Post all Rx buffers to FW */ 2271 spin_lock_bh(&cdev->ll2->lock); 2272 list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) { 2273 rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev), 2274 cdev->ll2->handle, 2275 buffer->phys_addr, 0, buffer, 1); 2276 if (rc) { 2277 DP_INFO(cdev, 2278 "Failed to post an Rx buffer; Deleting it\n"); 2279 dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr, 2280 cdev->ll2->rx_size, DMA_FROM_DEVICE); 2281 kfree(buffer->data); 2282 list_del(&buffer->list); 2283 kfree(buffer); 2284 } else { 2285 cdev->ll2->rx_cnt++; 2286 } 2287 } 2288 spin_unlock_bh(&cdev->ll2->lock); 2289 2290 if (!cdev->ll2->rx_cnt) { 2291 DP_INFO(cdev, "Failed passing even a single Rx buffer\n"); 2292 goto release_terminate; 2293 } 2294 2295 if (!is_valid_ether_addr(params->ll2_mac_address)) { 2296 DP_INFO(cdev, "Invalid Ethernet address\n"); 2297 goto release_terminate; 2298 } 2299 2300 if (QED_LEADING_HWFN(cdev)->hw_info.personality == QED_PCI_ISCSI) { 2301 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Starting OOO LL2 queue\n"); 2302 rc = qed_ll2_start_ooo(cdev, params); 2303 if (rc) { 2304 DP_INFO(cdev, 2305 "Failed to initialize the OOO LL2 queue\n"); 2306 goto release_terminate; 2307 } 2308 } 2309 2310 p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev)); 2311 if (!p_ptt) { 2312 DP_INFO(cdev, "Failed to acquire PTT\n"); 2313 goto release_terminate; 2314 } 2315 2316 rc = qed_llh_add_mac_filter(QED_LEADING_HWFN(cdev), p_ptt, 2317 params->ll2_mac_address); 2318 qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt); 2319 if (rc) { 2320 DP_ERR(cdev, "Failed to allocate LLH filter\n"); 2321 goto release_terminate_all; 2322 } 2323 2324 ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address); 2325 return 0; 2326 2327 release_terminate_all: 2328 2329 release_terminate: 2330 qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle); 2331 release_fail: 2332 qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle); 2333 fail: 2334 qed_ll2_kill_buffers(cdev); 2335 cdev->ll2->handle = QED_LL2_UNUSED_HANDLE; 2336 return -EINVAL; 2337 } 2338 2339 static int qed_ll2_stop(struct qed_dev *cdev) 2340 { 2341 struct qed_ptt *p_ptt; 2342 int rc; 2343 2344 if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE) 2345 return 0; 2346 2347 p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev)); 2348 if (!p_ptt) { 2349 DP_INFO(cdev, "Failed to acquire PTT\n"); 2350 goto fail; 2351 } 2352 2353 qed_llh_remove_mac_filter(QED_LEADING_HWFN(cdev), p_ptt, 2354 cdev->ll2_mac_address); 2355 qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt); 2356 eth_zero_addr(cdev->ll2_mac_address); 2357 2358 if (QED_LEADING_HWFN(cdev)->hw_info.personality == QED_PCI_ISCSI) 2359 qed_ll2_stop_ooo(cdev); 2360 2361 rc = qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), 2362 cdev->ll2->handle); 2363 if (rc) 2364 DP_INFO(cdev, "Failed to terminate LL2 connection\n"); 2365 2366 qed_ll2_kill_buffers(cdev); 2367 2368 qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle); 2369 cdev->ll2->handle = QED_LL2_UNUSED_HANDLE; 2370 2371 return rc; 2372 fail: 2373 return -EINVAL; 2374 } 2375 2376 static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb) 2377 { 2378 struct qed_ll2_tx_pkt_info pkt; 2379 const skb_frag_t *frag; 2380 int rc = -EINVAL, i; 2381 dma_addr_t mapping; 2382 u16 vlan = 0; 2383 u8 flags = 0; 2384 2385 if (unlikely(skb->ip_summed != CHECKSUM_NONE)) { 2386 DP_INFO(cdev, "Cannot transmit a checksumed packet\n"); 2387 return -EINVAL; 2388 } 2389 2390 if (1 + skb_shinfo(skb)->nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET) { 2391 DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n", 2392 1 + skb_shinfo(skb)->nr_frags); 2393 return -EINVAL; 2394 } 2395 2396 mapping = dma_map_single(&cdev->pdev->dev, skb->data, 2397 skb->len, DMA_TO_DEVICE); 2398 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) { 2399 DP_NOTICE(cdev, "SKB mapping failed\n"); 2400 return -EINVAL; 2401 } 2402 2403 /* Request HW to calculate IP csum */ 2404 if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) && 2405 ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6)) 2406 flags |= BIT(CORE_TX_BD_DATA_IP_CSUM_SHIFT); 2407 2408 if (skb_vlan_tag_present(skb)) { 2409 vlan = skb_vlan_tag_get(skb); 2410 flags |= BIT(CORE_TX_BD_DATA_VLAN_INSERTION_SHIFT); 2411 } 2412 2413 memset(&pkt, 0, sizeof(pkt)); 2414 pkt.num_of_bds = 1 + skb_shinfo(skb)->nr_frags; 2415 pkt.vlan = vlan; 2416 pkt.bd_flags = flags; 2417 pkt.tx_dest = QED_LL2_TX_DEST_NW; 2418 pkt.first_frag = mapping; 2419 pkt.first_frag_len = skb->len; 2420 pkt.cookie = skb; 2421 2422 rc = qed_ll2_prepare_tx_packet(&cdev->hwfns[0], cdev->ll2->handle, 2423 &pkt, 1); 2424 if (rc) 2425 goto err; 2426 2427 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 2428 frag = &skb_shinfo(skb)->frags[i]; 2429 2430 mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0, 2431 skb_frag_size(frag), DMA_TO_DEVICE); 2432 2433 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) { 2434 DP_NOTICE(cdev, 2435 "Unable to map frag - dropping packet\n"); 2436 goto err; 2437 } 2438 2439 rc = qed_ll2_set_fragment_of_tx_packet(QED_LEADING_HWFN(cdev), 2440 cdev->ll2->handle, 2441 mapping, 2442 skb_frag_size(frag)); 2443 2444 /* if failed not much to do here, partial packet has been posted 2445 * we can't free memory, will need to wait for completion. 2446 */ 2447 if (rc) 2448 goto err2; 2449 } 2450 2451 return 0; 2452 2453 err: 2454 dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE); 2455 2456 err2: 2457 return rc; 2458 } 2459 2460 static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats) 2461 { 2462 if (!cdev->ll2) 2463 return -EINVAL; 2464 2465 return qed_ll2_get_stats(QED_LEADING_HWFN(cdev), 2466 cdev->ll2->handle, stats); 2467 } 2468 2469 const struct qed_ll2_ops qed_ll2_ops_pass = { 2470 .start = &qed_ll2_start, 2471 .stop = &qed_ll2_stop, 2472 .start_xmit = &qed_ll2_start_xmit, 2473 .register_cb_ops = &qed_ll2_register_cb_ops, 2474 .get_stats = &qed_ll2_stats, 2475 }; 2476 2477 int qed_ll2_alloc_if(struct qed_dev *cdev) 2478 { 2479 cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL); 2480 return cdev->ll2 ? 0 : -ENOMEM; 2481 } 2482 2483 void qed_ll2_dealloc_if(struct qed_dev *cdev) 2484 { 2485 kfree(cdev->ll2); 2486 cdev->ll2 = NULL; 2487 } 2488