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/version.h> 42 #include <linux/workqueue.h> 43 #include <net/ipv6.h> 44 #include <linux/bitops.h> 45 #include <linux/delay.h> 46 #include <linux/errno.h> 47 #include <linux/etherdevice.h> 48 #include <linux/io.h> 49 #include <linux/list.h> 50 #include <linux/mutex.h> 51 #include <linux/spinlock.h> 52 #include <linux/string.h> 53 #include <linux/qed/qed_ll2_if.h> 54 #include "qed.h" 55 #include "qed_cxt.h" 56 #include "qed_dev_api.h" 57 #include "qed_hsi.h" 58 #include "qed_hw.h" 59 #include "qed_int.h" 60 #include "qed_ll2.h" 61 #include "qed_mcp.h" 62 #include "qed_ooo.h" 63 #include "qed_reg_addr.h" 64 #include "qed_sp.h" 65 #include "qed_roce.h" 66 67 #define QED_LL2_RX_REGISTERED(ll2) ((ll2)->rx_queue.b_cb_registred) 68 #define QED_LL2_TX_REGISTERED(ll2) ((ll2)->tx_queue.b_cb_registred) 69 70 #define QED_LL2_TX_SIZE (256) 71 #define QED_LL2_RX_SIZE (4096) 72 73 struct qed_cb_ll2_info { 74 int rx_cnt; 75 u32 rx_size; 76 u8 handle; 77 bool frags_mapped; 78 79 /* Lock protecting LL2 buffer lists in sleepless context */ 80 spinlock_t lock; 81 struct list_head list; 82 83 const struct qed_ll2_cb_ops *cbs; 84 void *cb_cookie; 85 }; 86 87 struct qed_ll2_buffer { 88 struct list_head list; 89 void *data; 90 dma_addr_t phys_addr; 91 }; 92 93 static void qed_ll2b_complete_tx_packet(struct qed_hwfn *p_hwfn, 94 u8 connection_handle, 95 void *cookie, 96 dma_addr_t first_frag_addr, 97 bool b_last_fragment, 98 bool b_last_packet) 99 { 100 struct qed_dev *cdev = p_hwfn->cdev; 101 struct sk_buff *skb = cookie; 102 103 /* All we need to do is release the mapping */ 104 dma_unmap_single(&p_hwfn->cdev->pdev->dev, first_frag_addr, 105 skb_headlen(skb), DMA_TO_DEVICE); 106 107 if (cdev->ll2->cbs && cdev->ll2->cbs->tx_cb) 108 cdev->ll2->cbs->tx_cb(cdev->ll2->cb_cookie, skb, 109 b_last_fragment); 110 111 if (cdev->ll2->frags_mapped) 112 /* Case where mapped frags were received, need to 113 * free skb with nr_frags marked as 0 114 */ 115 skb_shinfo(skb)->nr_frags = 0; 116 117 dev_kfree_skb_any(skb); 118 } 119 120 static int qed_ll2_alloc_buffer(struct qed_dev *cdev, 121 u8 **data, dma_addr_t *phys_addr) 122 { 123 *data = kmalloc(cdev->ll2->rx_size, GFP_ATOMIC); 124 if (!(*data)) { 125 DP_INFO(cdev, "Failed to allocate LL2 buffer data\n"); 126 return -ENOMEM; 127 } 128 129 *phys_addr = dma_map_single(&cdev->pdev->dev, 130 ((*data) + NET_SKB_PAD), 131 cdev->ll2->rx_size, DMA_FROM_DEVICE); 132 if (dma_mapping_error(&cdev->pdev->dev, *phys_addr)) { 133 DP_INFO(cdev, "Failed to map LL2 buffer data\n"); 134 kfree((*data)); 135 return -ENOMEM; 136 } 137 138 return 0; 139 } 140 141 static int qed_ll2_dealloc_buffer(struct qed_dev *cdev, 142 struct qed_ll2_buffer *buffer) 143 { 144 spin_lock_bh(&cdev->ll2->lock); 145 146 dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr, 147 cdev->ll2->rx_size, DMA_FROM_DEVICE); 148 kfree(buffer->data); 149 list_del(&buffer->list); 150 151 cdev->ll2->rx_cnt--; 152 if (!cdev->ll2->rx_cnt) 153 DP_INFO(cdev, "All LL2 entries were removed\n"); 154 155 spin_unlock_bh(&cdev->ll2->lock); 156 157 return 0; 158 } 159 160 static void qed_ll2_kill_buffers(struct qed_dev *cdev) 161 { 162 struct qed_ll2_buffer *buffer, *tmp_buffer; 163 164 list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) 165 qed_ll2_dealloc_buffer(cdev, buffer); 166 } 167 168 static void qed_ll2b_complete_rx_packet(struct qed_hwfn *p_hwfn, 169 u8 connection_handle, 170 struct qed_ll2_rx_packet *p_pkt, 171 struct core_rx_fast_path_cqe *p_cqe, 172 bool b_last_packet) 173 { 174 u16 packet_length = le16_to_cpu(p_cqe->packet_length); 175 struct qed_ll2_buffer *buffer = p_pkt->cookie; 176 struct qed_dev *cdev = p_hwfn->cdev; 177 u16 vlan = le16_to_cpu(p_cqe->vlan); 178 u32 opaque_data_0, opaque_data_1; 179 u8 pad = p_cqe->placement_offset; 180 dma_addr_t new_phys_addr; 181 struct sk_buff *skb; 182 bool reuse = false; 183 int rc = -EINVAL; 184 u8 *new_data; 185 186 opaque_data_0 = le32_to_cpu(p_cqe->opaque_data.data[0]); 187 opaque_data_1 = le32_to_cpu(p_cqe->opaque_data.data[1]); 188 189 DP_VERBOSE(p_hwfn, 190 (NETIF_MSG_RX_STATUS | QED_MSG_STORAGE | NETIF_MSG_PKTDATA), 191 "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", 192 (u64)p_pkt->rx_buf_addr, pad, packet_length, 193 le16_to_cpu(p_cqe->parse_flags.flags), vlan, 194 opaque_data_0, opaque_data_1); 195 196 if ((cdev->dp_module & NETIF_MSG_PKTDATA) && buffer->data) { 197 print_hex_dump(KERN_INFO, "", 198 DUMP_PREFIX_OFFSET, 16, 1, 199 buffer->data, packet_length, false); 200 } 201 202 /* Determine if data is valid */ 203 if (packet_length < ETH_HLEN) 204 reuse = true; 205 206 /* Allocate a replacement for buffer; Reuse upon failure */ 207 if (!reuse) 208 rc = qed_ll2_alloc_buffer(p_hwfn->cdev, &new_data, 209 &new_phys_addr); 210 211 /* If need to reuse or there's no replacement buffer, repost this */ 212 if (rc) 213 goto out_post; 214 dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr, 215 cdev->ll2->rx_size, DMA_FROM_DEVICE); 216 217 skb = build_skb(buffer->data, 0); 218 if (!skb) { 219 rc = -ENOMEM; 220 goto out_post; 221 } 222 223 pad += NET_SKB_PAD; 224 skb_reserve(skb, pad); 225 skb_put(skb, packet_length); 226 skb_checksum_none_assert(skb); 227 228 /* Get parital ethernet information instead of eth_type_trans(), 229 * Since we don't have an associated net_device. 230 */ 231 skb_reset_mac_header(skb); 232 skb->protocol = eth_hdr(skb)->h_proto; 233 234 /* Pass SKB onward */ 235 if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) { 236 if (vlan) 237 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan); 238 cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb, 239 opaque_data_0, opaque_data_1); 240 } 241 242 /* Update Buffer information and update FW producer */ 243 buffer->data = new_data; 244 buffer->phys_addr = new_phys_addr; 245 246 out_post: 247 rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev), cdev->ll2->handle, 248 buffer->phys_addr, 0, buffer, 1); 249 250 if (rc) 251 qed_ll2_dealloc_buffer(cdev, buffer); 252 } 253 254 static struct qed_ll2_info *__qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn, 255 u8 connection_handle, 256 bool b_lock, 257 bool b_only_active) 258 { 259 struct qed_ll2_info *p_ll2_conn, *p_ret = NULL; 260 261 if (connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) 262 return NULL; 263 264 if (!p_hwfn->p_ll2_info) 265 return NULL; 266 267 p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle]; 268 269 if (b_only_active) { 270 if (b_lock) 271 mutex_lock(&p_ll2_conn->mutex); 272 if (p_ll2_conn->b_active) 273 p_ret = p_ll2_conn; 274 if (b_lock) 275 mutex_unlock(&p_ll2_conn->mutex); 276 } else { 277 p_ret = p_ll2_conn; 278 } 279 280 return p_ret; 281 } 282 283 static struct qed_ll2_info *qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn, 284 u8 connection_handle) 285 { 286 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, true); 287 } 288 289 static struct qed_ll2_info *qed_ll2_handle_sanity_lock(struct qed_hwfn *p_hwfn, 290 u8 connection_handle) 291 { 292 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, true, true); 293 } 294 295 static struct qed_ll2_info *qed_ll2_handle_sanity_inactive(struct qed_hwfn 296 *p_hwfn, 297 u8 connection_handle) 298 { 299 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, false); 300 } 301 302 static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle) 303 { 304 bool b_last_packet = false, b_last_frag = false; 305 struct qed_ll2_tx_packet *p_pkt = NULL; 306 struct qed_ll2_info *p_ll2_conn; 307 struct qed_ll2_tx_queue *p_tx; 308 dma_addr_t tx_frag; 309 310 p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle); 311 if (!p_ll2_conn) 312 return; 313 314 p_tx = &p_ll2_conn->tx_queue; 315 316 while (!list_empty(&p_tx->active_descq)) { 317 p_pkt = list_first_entry(&p_tx->active_descq, 318 struct qed_ll2_tx_packet, list_entry); 319 if (!p_pkt) 320 break; 321 322 list_del(&p_pkt->list_entry); 323 b_last_packet = list_empty(&p_tx->active_descq); 324 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq); 325 if (p_ll2_conn->conn.conn_type == QED_LL2_TYPE_ISCSI_OOO) { 326 struct qed_ooo_buffer *p_buffer; 327 328 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie; 329 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, 330 p_buffer); 331 } else { 332 p_tx->cur_completing_packet = *p_pkt; 333 p_tx->cur_completing_bd_idx = 1; 334 b_last_frag = 335 p_tx->cur_completing_bd_idx == p_pkt->bd_used; 336 tx_frag = p_pkt->bds_set[0].tx_frag; 337 if (p_ll2_conn->conn.gsi_enable) 338 qed_ll2b_release_tx_gsi_packet(p_hwfn, 339 p_ll2_conn-> 340 my_id, 341 p_pkt->cookie, 342 tx_frag, 343 b_last_frag, 344 b_last_packet); 345 else 346 qed_ll2b_complete_tx_packet(p_hwfn, 347 p_ll2_conn->my_id, 348 p_pkt->cookie, 349 tx_frag, 350 b_last_frag, 351 b_last_packet); 352 } 353 } 354 } 355 356 static int qed_ll2_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie) 357 { 358 struct qed_ll2_info *p_ll2_conn = p_cookie; 359 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; 360 u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0; 361 struct qed_ll2_tx_packet *p_pkt; 362 bool b_last_frag = false; 363 unsigned long flags; 364 dma_addr_t tx_frag; 365 int rc = -EINVAL; 366 367 spin_lock_irqsave(&p_tx->lock, flags); 368 if (p_tx->b_completing_packet) { 369 rc = -EBUSY; 370 goto out; 371 } 372 373 new_idx = le16_to_cpu(*p_tx->p_fw_cons); 374 num_bds = ((s16)new_idx - (s16)p_tx->bds_idx); 375 while (num_bds) { 376 if (list_empty(&p_tx->active_descq)) 377 goto out; 378 379 p_pkt = list_first_entry(&p_tx->active_descq, 380 struct qed_ll2_tx_packet, list_entry); 381 if (!p_pkt) 382 goto out; 383 384 p_tx->b_completing_packet = true; 385 p_tx->cur_completing_packet = *p_pkt; 386 num_bds_in_packet = p_pkt->bd_used; 387 list_del(&p_pkt->list_entry); 388 389 if (num_bds < num_bds_in_packet) { 390 DP_NOTICE(p_hwfn, 391 "Rest of BDs does not cover whole packet\n"); 392 goto out; 393 } 394 395 num_bds -= num_bds_in_packet; 396 p_tx->bds_idx += num_bds_in_packet; 397 while (num_bds_in_packet--) 398 qed_chain_consume(&p_tx->txq_chain); 399 400 p_tx->cur_completing_bd_idx = 1; 401 b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used; 402 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq); 403 404 spin_unlock_irqrestore(&p_tx->lock, flags); 405 tx_frag = p_pkt->bds_set[0].tx_frag; 406 if (p_ll2_conn->conn.gsi_enable) 407 qed_ll2b_complete_tx_gsi_packet(p_hwfn, 408 p_ll2_conn->my_id, 409 p_pkt->cookie, 410 tx_frag, 411 b_last_frag, !num_bds); 412 else 413 qed_ll2b_complete_tx_packet(p_hwfn, 414 p_ll2_conn->my_id, 415 p_pkt->cookie, 416 tx_frag, 417 b_last_frag, !num_bds); 418 spin_lock_irqsave(&p_tx->lock, flags); 419 } 420 421 p_tx->b_completing_packet = false; 422 rc = 0; 423 out: 424 spin_unlock_irqrestore(&p_tx->lock, flags); 425 return rc; 426 } 427 428 static int 429 qed_ll2_rxq_completion_gsi(struct qed_hwfn *p_hwfn, 430 struct qed_ll2_info *p_ll2_info, 431 union core_rx_cqe_union *p_cqe, 432 unsigned long lock_flags, bool b_last_cqe) 433 { 434 struct qed_ll2_rx_queue *p_rx = &p_ll2_info->rx_queue; 435 struct qed_ll2_rx_packet *p_pkt = NULL; 436 u16 packet_length, parse_flags, vlan; 437 u32 src_mac_addrhi; 438 u16 src_mac_addrlo; 439 440 if (!list_empty(&p_rx->active_descq)) 441 p_pkt = list_first_entry(&p_rx->active_descq, 442 struct qed_ll2_rx_packet, list_entry); 443 if (!p_pkt) { 444 DP_NOTICE(p_hwfn, 445 "GSI Rx completion but active_descq is empty\n"); 446 return -EIO; 447 } 448 449 list_del(&p_pkt->list_entry); 450 parse_flags = le16_to_cpu(p_cqe->rx_cqe_gsi.parse_flags.flags); 451 packet_length = le16_to_cpu(p_cqe->rx_cqe_gsi.data_length); 452 vlan = le16_to_cpu(p_cqe->rx_cqe_gsi.vlan); 453 src_mac_addrhi = le32_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrhi); 454 src_mac_addrlo = le16_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrlo); 455 if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd) 456 DP_NOTICE(p_hwfn, 457 "Mismatch between active_descq and the LL2 Rx chain\n"); 458 list_add_tail(&p_pkt->list_entry, &p_rx->free_descq); 459 460 spin_unlock_irqrestore(&p_rx->lock, lock_flags); 461 qed_ll2b_complete_rx_gsi_packet(p_hwfn, 462 p_ll2_info->my_id, 463 p_pkt->cookie, 464 p_pkt->rx_buf_addr, 465 packet_length, 466 p_cqe->rx_cqe_gsi.data_length_error, 467 parse_flags, 468 vlan, 469 src_mac_addrhi, 470 src_mac_addrlo, b_last_cqe); 471 spin_lock_irqsave(&p_rx->lock, lock_flags); 472 473 return 0; 474 } 475 476 static int qed_ll2_rxq_completion_reg(struct qed_hwfn *p_hwfn, 477 struct qed_ll2_info *p_ll2_conn, 478 union core_rx_cqe_union *p_cqe, 479 unsigned long *p_lock_flags, 480 bool b_last_cqe) 481 { 482 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; 483 struct qed_ll2_rx_packet *p_pkt = NULL; 484 485 if (!list_empty(&p_rx->active_descq)) 486 p_pkt = list_first_entry(&p_rx->active_descq, 487 struct qed_ll2_rx_packet, list_entry); 488 if (!p_pkt) { 489 DP_NOTICE(p_hwfn, 490 "LL2 Rx completion but active_descq is empty\n"); 491 return -EIO; 492 } 493 list_del(&p_pkt->list_entry); 494 495 if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd) 496 DP_NOTICE(p_hwfn, 497 "Mismatch between active_descq and the LL2 Rx chain\n"); 498 list_add_tail(&p_pkt->list_entry, &p_rx->free_descq); 499 500 spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags); 501 qed_ll2b_complete_rx_packet(p_hwfn, p_ll2_conn->my_id, 502 p_pkt, &p_cqe->rx_cqe_fp, b_last_cqe); 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 = 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 = qed_chain_consume(&p_rx->rcq_chain); 525 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain); 526 527 DP_VERBOSE(p_hwfn, 528 QED_MSG_LL2, 529 "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n", 530 cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type); 531 532 switch (cqe->rx_cqe_sp.type) { 533 case CORE_RX_CQE_TYPE_SLOW_PATH: 534 DP_NOTICE(p_hwfn, "LL2 - unexpected Rx CQE slowpath\n"); 535 rc = -EINVAL; 536 break; 537 case CORE_RX_CQE_TYPE_GSI_OFFLOAD: 538 rc = qed_ll2_rxq_completion_gsi(p_hwfn, p_ll2_conn, 539 cqe, flags, b_last_cqe); 540 break; 541 case CORE_RX_CQE_TYPE_REGULAR: 542 rc = qed_ll2_rxq_completion_reg(p_hwfn, p_ll2_conn, 543 cqe, &flags, 544 b_last_cqe); 545 break; 546 default: 547 rc = -EIO; 548 } 549 } 550 551 spin_unlock_irqrestore(&p_rx->lock, flags); 552 return rc; 553 } 554 555 static void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle) 556 { 557 struct qed_ll2_info *p_ll2_conn = NULL; 558 struct qed_ll2_rx_packet *p_pkt = NULL; 559 struct qed_ll2_rx_queue *p_rx; 560 561 p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle); 562 if (!p_ll2_conn) 563 return; 564 565 p_rx = &p_ll2_conn->rx_queue; 566 567 while (!list_empty(&p_rx->active_descq)) { 568 dma_addr_t rx_buf_addr; 569 void *cookie; 570 bool b_last; 571 572 p_pkt = list_first_entry(&p_rx->active_descq, 573 struct qed_ll2_rx_packet, list_entry); 574 if (!p_pkt) 575 break; 576 577 list_move_tail(&p_pkt->list_entry, &p_rx->free_descq); 578 579 if (p_ll2_conn->conn.conn_type == QED_LL2_TYPE_ISCSI_OOO) { 580 struct qed_ooo_buffer *p_buffer; 581 582 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie; 583 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, 584 p_buffer); 585 } else { 586 rx_buf_addr = p_pkt->rx_buf_addr; 587 cookie = p_pkt->cookie; 588 589 b_last = list_empty(&p_rx->active_descq); 590 } 591 } 592 } 593 594 #if IS_ENABLED(CONFIG_QED_ISCSI) 595 static u8 qed_ll2_convert_rx_parse_to_tx_flags(u16 parse_flags) 596 { 597 u8 bd_flags = 0; 598 599 if (GET_FIELD(parse_flags, PARSING_AND_ERR_FLAGS_TAG8021QEXIST)) 600 SET_FIELD(bd_flags, CORE_TX_BD_DATA_VLAN_INSERTION, 1); 601 602 return bd_flags; 603 } 604 605 static int qed_ll2_lb_rxq_handler(struct qed_hwfn *p_hwfn, 606 struct qed_ll2_info *p_ll2_conn) 607 { 608 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; 609 u16 packet_length = 0, parse_flags = 0, vlan = 0; 610 struct qed_ll2_rx_packet *p_pkt = NULL; 611 u32 num_ooo_add_to_peninsula = 0, cid; 612 union core_rx_cqe_union *cqe = NULL; 613 u16 cq_new_idx = 0, cq_old_idx = 0; 614 struct qed_ooo_buffer *p_buffer; 615 struct ooo_opaque *iscsi_ooo; 616 u8 placement_offset = 0; 617 u8 cqe_type; 618 619 cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons); 620 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain); 621 if (cq_new_idx == cq_old_idx) 622 return 0; 623 624 while (cq_new_idx != cq_old_idx) { 625 struct core_rx_fast_path_cqe *p_cqe_fp; 626 627 cqe = qed_chain_consume(&p_rx->rcq_chain); 628 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain); 629 cqe_type = cqe->rx_cqe_sp.type; 630 631 if (cqe_type != CORE_RX_CQE_TYPE_REGULAR) { 632 DP_NOTICE(p_hwfn, 633 "Got a non-regular LB LL2 completion [type 0x%02x]\n", 634 cqe_type); 635 return -EINVAL; 636 } 637 p_cqe_fp = &cqe->rx_cqe_fp; 638 639 placement_offset = p_cqe_fp->placement_offset; 640 parse_flags = le16_to_cpu(p_cqe_fp->parse_flags.flags); 641 packet_length = le16_to_cpu(p_cqe_fp->packet_length); 642 vlan = le16_to_cpu(p_cqe_fp->vlan); 643 iscsi_ooo = (struct ooo_opaque *)&p_cqe_fp->opaque_data; 644 qed_ooo_save_history_entry(p_hwfn, p_hwfn->p_ooo_info, 645 iscsi_ooo); 646 cid = le32_to_cpu(iscsi_ooo->cid); 647 648 /* Process delete isle first */ 649 if (iscsi_ooo->drop_size) 650 qed_ooo_delete_isles(p_hwfn, p_hwfn->p_ooo_info, cid, 651 iscsi_ooo->drop_isle, 652 iscsi_ooo->drop_size); 653 654 if (iscsi_ooo->ooo_opcode == TCP_EVENT_NOP) 655 continue; 656 657 /* Now process create/add/join isles */ 658 if (list_empty(&p_rx->active_descq)) { 659 DP_NOTICE(p_hwfn, 660 "LL2 OOO RX chain has no submitted buffers\n" 661 ); 662 return -EIO; 663 } 664 665 p_pkt = list_first_entry(&p_rx->active_descq, 666 struct qed_ll2_rx_packet, list_entry); 667 668 if ((iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_NEW_ISLE) || 669 (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_RIGHT) || 670 (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_LEFT) || 671 (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_PEN) || 672 (iscsi_ooo->ooo_opcode == TCP_EVENT_JOIN)) { 673 if (!p_pkt) { 674 DP_NOTICE(p_hwfn, 675 "LL2 OOO RX packet is not valid\n"); 676 return -EIO; 677 } 678 list_del(&p_pkt->list_entry); 679 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie; 680 p_buffer->packet_length = packet_length; 681 p_buffer->parse_flags = parse_flags; 682 p_buffer->vlan = vlan; 683 p_buffer->placement_offset = placement_offset; 684 qed_chain_consume(&p_rx->rxq_chain); 685 list_add_tail(&p_pkt->list_entry, &p_rx->free_descq); 686 687 switch (iscsi_ooo->ooo_opcode) { 688 case TCP_EVENT_ADD_NEW_ISLE: 689 qed_ooo_add_new_isle(p_hwfn, 690 p_hwfn->p_ooo_info, 691 cid, 692 iscsi_ooo->ooo_isle, 693 p_buffer); 694 break; 695 case TCP_EVENT_ADD_ISLE_RIGHT: 696 qed_ooo_add_new_buffer(p_hwfn, 697 p_hwfn->p_ooo_info, 698 cid, 699 iscsi_ooo->ooo_isle, 700 p_buffer, 701 QED_OOO_RIGHT_BUF); 702 break; 703 case TCP_EVENT_ADD_ISLE_LEFT: 704 qed_ooo_add_new_buffer(p_hwfn, 705 p_hwfn->p_ooo_info, 706 cid, 707 iscsi_ooo->ooo_isle, 708 p_buffer, 709 QED_OOO_LEFT_BUF); 710 break; 711 case TCP_EVENT_JOIN: 712 qed_ooo_add_new_buffer(p_hwfn, 713 p_hwfn->p_ooo_info, 714 cid, 715 iscsi_ooo->ooo_isle + 716 1, 717 p_buffer, 718 QED_OOO_LEFT_BUF); 719 qed_ooo_join_isles(p_hwfn, 720 p_hwfn->p_ooo_info, 721 cid, iscsi_ooo->ooo_isle); 722 break; 723 case TCP_EVENT_ADD_PEN: 724 num_ooo_add_to_peninsula++; 725 qed_ooo_put_ready_buffer(p_hwfn, 726 p_hwfn->p_ooo_info, 727 p_buffer, true); 728 break; 729 } 730 } else { 731 DP_NOTICE(p_hwfn, 732 "Unexpected event (%d) TX OOO completion\n", 733 iscsi_ooo->ooo_opcode); 734 } 735 } 736 737 return 0; 738 } 739 740 static void 741 qed_ooo_submit_tx_buffers(struct qed_hwfn *p_hwfn, 742 struct qed_ll2_info *p_ll2_conn) 743 { 744 struct qed_ooo_buffer *p_buffer; 745 int rc; 746 u16 l4_hdr_offset_w; 747 dma_addr_t first_frag; 748 u16 parse_flags; 749 u8 bd_flags; 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 rc = qed_ll2_prepare_tx_packet(p_hwfn, p_ll2_conn->my_id, 1, 765 p_buffer->vlan, bd_flags, 766 l4_hdr_offset_w, 767 p_ll2_conn->conn.tx_dest, 0, 768 first_frag, 769 p_buffer->packet_length, 770 p_buffer, true); 771 if (rc) { 772 qed_ooo_put_ready_buffer(p_hwfn, p_hwfn->p_ooo_info, 773 p_buffer, false); 774 break; 775 } 776 } 777 } 778 779 static void 780 qed_ooo_submit_rx_buffers(struct qed_hwfn *p_hwfn, 781 struct qed_ll2_info *p_ll2_conn) 782 { 783 struct qed_ooo_buffer *p_buffer; 784 int rc; 785 786 while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn, 787 p_hwfn->p_ooo_info))) { 788 rc = qed_ll2_post_rx_buffer(p_hwfn, 789 p_ll2_conn->my_id, 790 p_buffer->rx_buffer_phys_addr, 791 0, p_buffer, true); 792 if (rc) { 793 qed_ooo_put_free_buffer(p_hwfn, 794 p_hwfn->p_ooo_info, p_buffer); 795 break; 796 } 797 } 798 } 799 800 static int qed_ll2_lb_rxq_completion(struct qed_hwfn *p_hwfn, void *p_cookie) 801 { 802 struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie; 803 int rc; 804 805 rc = qed_ll2_lb_rxq_handler(p_hwfn, p_ll2_conn); 806 if (rc) 807 return rc; 808 809 qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn); 810 qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn); 811 812 return 0; 813 } 814 815 static int qed_ll2_lb_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie) 816 { 817 struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie; 818 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; 819 struct qed_ll2_tx_packet *p_pkt = NULL; 820 struct qed_ooo_buffer *p_buffer; 821 bool b_dont_submit_rx = false; 822 u16 new_idx = 0, num_bds = 0; 823 int rc; 824 825 new_idx = le16_to_cpu(*p_tx->p_fw_cons); 826 num_bds = ((s16)new_idx - (s16)p_tx->bds_idx); 827 828 if (!num_bds) 829 return 0; 830 831 while (num_bds) { 832 if (list_empty(&p_tx->active_descq)) 833 return -EINVAL; 834 835 p_pkt = list_first_entry(&p_tx->active_descq, 836 struct qed_ll2_tx_packet, list_entry); 837 if (!p_pkt) 838 return -EINVAL; 839 840 if (p_pkt->bd_used != 1) { 841 DP_NOTICE(p_hwfn, 842 "Unexpectedly many BDs(%d) in TX OOO completion\n", 843 p_pkt->bd_used); 844 return -EINVAL; 845 } 846 847 list_del(&p_pkt->list_entry); 848 849 num_bds--; 850 p_tx->bds_idx++; 851 qed_chain_consume(&p_tx->txq_chain); 852 853 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie; 854 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq); 855 856 if (b_dont_submit_rx) { 857 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, 858 p_buffer); 859 continue; 860 } 861 862 rc = qed_ll2_post_rx_buffer(p_hwfn, p_ll2_conn->my_id, 863 p_buffer->rx_buffer_phys_addr, 0, 864 p_buffer, true); 865 if (rc != 0) { 866 qed_ooo_put_free_buffer(p_hwfn, 867 p_hwfn->p_ooo_info, p_buffer); 868 b_dont_submit_rx = true; 869 } 870 } 871 872 qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn); 873 874 return 0; 875 } 876 877 static int 878 qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn, 879 struct qed_ll2_info *p_ll2_info, 880 u16 rx_num_ooo_buffers, u16 mtu) 881 { 882 struct qed_ooo_buffer *p_buf = NULL; 883 void *p_virt; 884 u16 buf_idx; 885 int rc = 0; 886 887 if (p_ll2_info->conn.conn_type != QED_LL2_TYPE_ISCSI_OOO) 888 return rc; 889 890 if (!rx_num_ooo_buffers) 891 return -EINVAL; 892 893 for (buf_idx = 0; buf_idx < rx_num_ooo_buffers; buf_idx++) { 894 p_buf = kzalloc(sizeof(*p_buf), GFP_KERNEL); 895 if (!p_buf) { 896 rc = -ENOMEM; 897 goto out; 898 } 899 900 p_buf->rx_buffer_size = mtu + 26 + ETH_CACHE_LINE_SIZE; 901 p_buf->rx_buffer_size = (p_buf->rx_buffer_size + 902 ETH_CACHE_LINE_SIZE - 1) & 903 ~(ETH_CACHE_LINE_SIZE - 1); 904 p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev, 905 p_buf->rx_buffer_size, 906 &p_buf->rx_buffer_phys_addr, 907 GFP_KERNEL); 908 if (!p_virt) { 909 kfree(p_buf); 910 rc = -ENOMEM; 911 goto out; 912 } 913 914 p_buf->rx_buffer_virt_addr = p_virt; 915 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buf); 916 } 917 918 DP_VERBOSE(p_hwfn, QED_MSG_LL2, 919 "Allocated [%04x] LL2 OOO buffers [each of size 0x%08x]\n", 920 rx_num_ooo_buffers, p_buf->rx_buffer_size); 921 922 out: 923 return rc; 924 } 925 926 static void 927 qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn, 928 struct qed_ll2_info *p_ll2_conn) 929 { 930 if (p_ll2_conn->conn.conn_type != QED_LL2_TYPE_ISCSI_OOO) 931 return; 932 933 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info); 934 qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn); 935 } 936 937 static void qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn, 938 struct qed_ll2_info *p_ll2_conn) 939 { 940 struct qed_ooo_buffer *p_buffer; 941 942 if (p_ll2_conn->conn.conn_type != QED_LL2_TYPE_ISCSI_OOO) 943 return; 944 945 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info); 946 while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn, 947 p_hwfn->p_ooo_info))) { 948 dma_free_coherent(&p_hwfn->cdev->pdev->dev, 949 p_buffer->rx_buffer_size, 950 p_buffer->rx_buffer_virt_addr, 951 p_buffer->rx_buffer_phys_addr); 952 kfree(p_buffer); 953 } 954 } 955 956 static void qed_ll2_stop_ooo(struct qed_dev *cdev) 957 { 958 struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev); 959 u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id; 960 961 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Stopping LL2 OOO queue [%02x]\n", 962 *handle); 963 964 qed_ll2_terminate_connection(hwfn, *handle); 965 qed_ll2_release_connection(hwfn, *handle); 966 *handle = QED_LL2_UNUSED_HANDLE; 967 } 968 969 static int qed_ll2_start_ooo(struct qed_dev *cdev, 970 struct qed_ll2_params *params) 971 { 972 struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev); 973 u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id; 974 struct qed_ll2_conn ll2_info = { 0 }; 975 int rc; 976 977 ll2_info.conn_type = QED_LL2_TYPE_ISCSI_OOO; 978 ll2_info.mtu = params->mtu; 979 ll2_info.rx_drop_ttl0_flg = params->drop_ttl0_packets; 980 ll2_info.rx_vlan_removal_en = params->rx_vlan_stripping; 981 ll2_info.tx_tc = OOO_LB_TC; 982 ll2_info.tx_dest = CORE_TX_DEST_LB; 983 984 rc = qed_ll2_acquire_connection(hwfn, &ll2_info, 985 QED_LL2_RX_SIZE, QED_LL2_TX_SIZE, 986 handle); 987 if (rc) { 988 DP_INFO(cdev, "Failed to acquire LL2 OOO connection\n"); 989 goto out; 990 } 991 992 rc = qed_ll2_establish_connection(hwfn, *handle); 993 if (rc) { 994 DP_INFO(cdev, "Failed to establist LL2 OOO connection\n"); 995 goto fail; 996 } 997 998 return 0; 999 1000 fail: 1001 qed_ll2_release_connection(hwfn, *handle); 1002 out: 1003 *handle = QED_LL2_UNUSED_HANDLE; 1004 return rc; 1005 } 1006 #else /* IS_ENABLED(CONFIG_QED_ISCSI) */ 1007 static int qed_ll2_lb_rxq_completion(struct qed_hwfn *p_hwfn, 1008 void *p_cookie) { return -EINVAL; } 1009 static int qed_ll2_lb_txq_completion(struct qed_hwfn *p_hwfn, 1010 void *p_cookie) { return -EINVAL; } 1011 static inline int 1012 qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn, 1013 struct qed_ll2_info *p_ll2_info, 1014 u16 rx_num_ooo_buffers, u16 mtu) { return 0; } 1015 static inline void 1016 qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn, 1017 struct qed_ll2_info *p_ll2_conn) { return; } 1018 static inline void 1019 qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn, 1020 struct qed_ll2_info *p_ll2_conn) { return; } 1021 static inline void qed_ll2_stop_ooo(struct qed_dev *cdev) { return; } 1022 static inline int qed_ll2_start_ooo(struct qed_dev *cdev, 1023 struct qed_ll2_params *params) 1024 { return -EINVAL; } 1025 #endif /* IS_ENABLED(CONFIG_QED_ISCSI) */ 1026 1027 static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn, 1028 struct qed_ll2_info *p_ll2_conn, 1029 u8 action_on_error) 1030 { 1031 enum qed_ll2_conn_type conn_type = p_ll2_conn->conn.conn_type; 1032 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; 1033 struct core_rx_start_ramrod_data *p_ramrod = NULL; 1034 struct qed_spq_entry *p_ent = NULL; 1035 struct qed_sp_init_data init_data; 1036 u16 cqe_pbl_size; 1037 int rc = 0; 1038 1039 /* Get SPQ entry */ 1040 memset(&init_data, 0, sizeof(init_data)); 1041 init_data.cid = p_ll2_conn->cid; 1042 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; 1043 init_data.comp_mode = QED_SPQ_MODE_EBLOCK; 1044 1045 rc = qed_sp_init_request(p_hwfn, &p_ent, 1046 CORE_RAMROD_RX_QUEUE_START, 1047 PROTOCOLID_CORE, &init_data); 1048 if (rc) 1049 return rc; 1050 1051 p_ramrod = &p_ent->ramrod.core_rx_queue_start; 1052 1053 p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn)); 1054 p_ramrod->sb_index = p_rx->rx_sb_index; 1055 p_ramrod->complete_event_flg = 1; 1056 1057 p_ramrod->mtu = cpu_to_le16(p_ll2_conn->conn.mtu); 1058 DMA_REGPAIR_LE(p_ramrod->bd_base, 1059 p_rx->rxq_chain.p_phys_addr); 1060 cqe_pbl_size = (u16)qed_chain_get_page_cnt(&p_rx->rcq_chain); 1061 p_ramrod->num_of_pbl_pages = cpu_to_le16(cqe_pbl_size); 1062 DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr, 1063 qed_chain_get_pbl_phys(&p_rx->rcq_chain)); 1064 1065 p_ramrod->drop_ttl0_flg = p_ll2_conn->conn.rx_drop_ttl0_flg; 1066 p_ramrod->inner_vlan_removal_en = p_ll2_conn->conn.rx_vlan_removal_en; 1067 p_ramrod->queue_id = p_ll2_conn->queue_id; 1068 p_ramrod->main_func_queue = (conn_type == QED_LL2_TYPE_ISCSI_OOO) ? 0 1069 : 1; 1070 1071 if ((IS_MF_DEFAULT(p_hwfn) || IS_MF_SI(p_hwfn)) && 1072 p_ramrod->main_func_queue && (conn_type != QED_LL2_TYPE_ROCE)) { 1073 p_ramrod->mf_si_bcast_accept_all = 1; 1074 p_ramrod->mf_si_mcast_accept_all = 1; 1075 } else { 1076 p_ramrod->mf_si_bcast_accept_all = 0; 1077 p_ramrod->mf_si_mcast_accept_all = 0; 1078 } 1079 1080 p_ramrod->action_on_error.error_type = action_on_error; 1081 p_ramrod->gsi_offload_flag = p_ll2_conn->conn.gsi_enable; 1082 return qed_spq_post(p_hwfn, p_ent, NULL); 1083 } 1084 1085 static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn, 1086 struct qed_ll2_info *p_ll2_conn) 1087 { 1088 enum qed_ll2_conn_type conn_type = p_ll2_conn->conn.conn_type; 1089 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; 1090 struct core_tx_start_ramrod_data *p_ramrod = NULL; 1091 struct qed_spq_entry *p_ent = NULL; 1092 struct qed_sp_init_data init_data; 1093 u16 pq_id = 0, pbl_size; 1094 int rc = -EINVAL; 1095 1096 if (!QED_LL2_TX_REGISTERED(p_ll2_conn)) 1097 return 0; 1098 1099 if (p_ll2_conn->conn.conn_type == QED_LL2_TYPE_ISCSI_OOO) 1100 p_ll2_conn->tx_stats_en = 0; 1101 else 1102 p_ll2_conn->tx_stats_en = 1; 1103 1104 /* Get SPQ entry */ 1105 memset(&init_data, 0, sizeof(init_data)); 1106 init_data.cid = p_ll2_conn->cid; 1107 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; 1108 init_data.comp_mode = QED_SPQ_MODE_EBLOCK; 1109 1110 rc = qed_sp_init_request(p_hwfn, &p_ent, 1111 CORE_RAMROD_TX_QUEUE_START, 1112 PROTOCOLID_CORE, &init_data); 1113 if (rc) 1114 return rc; 1115 1116 p_ramrod = &p_ent->ramrod.core_tx_queue_start; 1117 1118 p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn)); 1119 p_ramrod->sb_index = p_tx->tx_sb_index; 1120 p_ramrod->mtu = cpu_to_le16(p_ll2_conn->conn.mtu); 1121 p_ramrod->stats_en = p_ll2_conn->tx_stats_en; 1122 p_ramrod->stats_id = p_ll2_conn->tx_stats_id; 1123 1124 DMA_REGPAIR_LE(p_ramrod->pbl_base_addr, 1125 qed_chain_get_pbl_phys(&p_tx->txq_chain)); 1126 pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain); 1127 p_ramrod->pbl_size = cpu_to_le16(pbl_size); 1128 1129 switch (p_ll2_conn->conn.tx_tc) { 1130 case LB_TC: 1131 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB); 1132 break; 1133 case OOO_LB_TC: 1134 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OOO); 1135 default: 1136 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD); 1137 break; 1138 } 1139 1140 p_ramrod->qm_pq_id = cpu_to_le16(pq_id); 1141 1142 switch (conn_type) { 1143 case QED_LL2_TYPE_FCOE: 1144 p_ramrod->conn_type = PROTOCOLID_FCOE; 1145 break; 1146 case QED_LL2_TYPE_ISCSI: 1147 case QED_LL2_TYPE_ISCSI_OOO: 1148 p_ramrod->conn_type = PROTOCOLID_ISCSI; 1149 break; 1150 case QED_LL2_TYPE_ROCE: 1151 p_ramrod->conn_type = PROTOCOLID_ROCE; 1152 break; 1153 default: 1154 p_ramrod->conn_type = PROTOCOLID_ETH; 1155 DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type); 1156 } 1157 1158 p_ramrod->gsi_offload_flag = p_ll2_conn->conn.gsi_enable; 1159 return qed_spq_post(p_hwfn, p_ent, NULL); 1160 } 1161 1162 static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn, 1163 struct qed_ll2_info *p_ll2_conn) 1164 { 1165 struct core_rx_stop_ramrod_data *p_ramrod = NULL; 1166 struct qed_spq_entry *p_ent = NULL; 1167 struct qed_sp_init_data init_data; 1168 int rc = -EINVAL; 1169 1170 /* Get SPQ entry */ 1171 memset(&init_data, 0, sizeof(init_data)); 1172 init_data.cid = p_ll2_conn->cid; 1173 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; 1174 init_data.comp_mode = QED_SPQ_MODE_EBLOCK; 1175 1176 rc = qed_sp_init_request(p_hwfn, &p_ent, 1177 CORE_RAMROD_RX_QUEUE_STOP, 1178 PROTOCOLID_CORE, &init_data); 1179 if (rc) 1180 return rc; 1181 1182 p_ramrod = &p_ent->ramrod.core_rx_queue_stop; 1183 1184 p_ramrod->complete_event_flg = 1; 1185 p_ramrod->queue_id = p_ll2_conn->queue_id; 1186 1187 return qed_spq_post(p_hwfn, p_ent, NULL); 1188 } 1189 1190 static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn, 1191 struct qed_ll2_info *p_ll2_conn) 1192 { 1193 struct qed_spq_entry *p_ent = NULL; 1194 struct qed_sp_init_data init_data; 1195 int rc = -EINVAL; 1196 1197 /* Get SPQ entry */ 1198 memset(&init_data, 0, sizeof(init_data)); 1199 init_data.cid = p_ll2_conn->cid; 1200 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; 1201 init_data.comp_mode = QED_SPQ_MODE_EBLOCK; 1202 1203 rc = qed_sp_init_request(p_hwfn, &p_ent, 1204 CORE_RAMROD_TX_QUEUE_STOP, 1205 PROTOCOLID_CORE, &init_data); 1206 if (rc) 1207 return rc; 1208 1209 return qed_spq_post(p_hwfn, p_ent, NULL); 1210 } 1211 1212 static int 1213 qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn, 1214 struct qed_ll2_info *p_ll2_info, u16 rx_num_desc) 1215 { 1216 struct qed_ll2_rx_packet *p_descq; 1217 u32 capacity; 1218 int rc = 0; 1219 1220 if (!rx_num_desc) 1221 goto out; 1222 1223 rc = qed_chain_alloc(p_hwfn->cdev, 1224 QED_CHAIN_USE_TO_CONSUME_PRODUCE, 1225 QED_CHAIN_MODE_NEXT_PTR, 1226 QED_CHAIN_CNT_TYPE_U16, 1227 rx_num_desc, 1228 sizeof(struct core_rx_bd), 1229 &p_ll2_info->rx_queue.rxq_chain); 1230 if (rc) { 1231 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n"); 1232 goto out; 1233 } 1234 1235 capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain); 1236 p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet), 1237 GFP_KERNEL); 1238 if (!p_descq) { 1239 rc = -ENOMEM; 1240 DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n"); 1241 goto out; 1242 } 1243 p_ll2_info->rx_queue.descq_array = p_descq; 1244 1245 rc = qed_chain_alloc(p_hwfn->cdev, 1246 QED_CHAIN_USE_TO_CONSUME_PRODUCE, 1247 QED_CHAIN_MODE_PBL, 1248 QED_CHAIN_CNT_TYPE_U16, 1249 rx_num_desc, 1250 sizeof(struct core_rx_fast_path_cqe), 1251 &p_ll2_info->rx_queue.rcq_chain); 1252 if (rc) { 1253 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n"); 1254 goto out; 1255 } 1256 1257 DP_VERBOSE(p_hwfn, QED_MSG_LL2, 1258 "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n", 1259 p_ll2_info->conn.conn_type, rx_num_desc); 1260 1261 out: 1262 return rc; 1263 } 1264 1265 static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn, 1266 struct qed_ll2_info *p_ll2_info, 1267 u16 tx_num_desc) 1268 { 1269 struct qed_ll2_tx_packet *p_descq; 1270 u32 capacity; 1271 int rc = 0; 1272 1273 if (!tx_num_desc) 1274 goto out; 1275 1276 rc = qed_chain_alloc(p_hwfn->cdev, 1277 QED_CHAIN_USE_TO_CONSUME_PRODUCE, 1278 QED_CHAIN_MODE_PBL, 1279 QED_CHAIN_CNT_TYPE_U16, 1280 tx_num_desc, 1281 sizeof(struct core_tx_bd), 1282 &p_ll2_info->tx_queue.txq_chain); 1283 if (rc) 1284 goto out; 1285 1286 capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain); 1287 p_descq = kcalloc(capacity, sizeof(struct qed_ll2_tx_packet), 1288 GFP_KERNEL); 1289 if (!p_descq) { 1290 rc = -ENOMEM; 1291 goto out; 1292 } 1293 p_ll2_info->tx_queue.descq_array = p_descq; 1294 1295 DP_VERBOSE(p_hwfn, QED_MSG_LL2, 1296 "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n", 1297 p_ll2_info->conn.conn_type, tx_num_desc); 1298 1299 out: 1300 if (rc) 1301 DP_NOTICE(p_hwfn, 1302 "Can't allocate memory for Tx LL2 with 0x%08x buffers\n", 1303 tx_num_desc); 1304 return rc; 1305 } 1306 1307 int qed_ll2_acquire_connection(struct qed_hwfn *p_hwfn, 1308 struct qed_ll2_conn *p_params, 1309 u16 rx_num_desc, 1310 u16 tx_num_desc, 1311 u8 *p_connection_handle) 1312 { 1313 qed_int_comp_cb_t comp_rx_cb, comp_tx_cb; 1314 struct qed_ll2_info *p_ll2_info = NULL; 1315 int rc; 1316 u8 i; 1317 1318 if (!p_connection_handle || !p_hwfn->p_ll2_info) 1319 return -EINVAL; 1320 1321 /* Find a free connection to be used */ 1322 for (i = 0; (i < QED_MAX_NUM_OF_LL2_CONNECTIONS); i++) { 1323 mutex_lock(&p_hwfn->p_ll2_info[i].mutex); 1324 if (p_hwfn->p_ll2_info[i].b_active) { 1325 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex); 1326 continue; 1327 } 1328 1329 p_hwfn->p_ll2_info[i].b_active = true; 1330 p_ll2_info = &p_hwfn->p_ll2_info[i]; 1331 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex); 1332 break; 1333 } 1334 if (!p_ll2_info) 1335 return -EBUSY; 1336 1337 p_ll2_info->conn = *p_params; 1338 1339 rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info, rx_num_desc); 1340 if (rc) 1341 goto q_allocate_fail; 1342 1343 rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info, tx_num_desc); 1344 if (rc) 1345 goto q_allocate_fail; 1346 1347 rc = qed_ll2_acquire_connection_ooo(p_hwfn, p_ll2_info, 1348 rx_num_desc * 2, p_params->mtu); 1349 if (rc) 1350 goto q_allocate_fail; 1351 1352 /* Register callbacks for the Rx/Tx queues */ 1353 if (p_params->conn_type == QED_LL2_TYPE_ISCSI_OOO) { 1354 comp_rx_cb = qed_ll2_lb_rxq_completion; 1355 comp_tx_cb = qed_ll2_lb_txq_completion; 1356 } else { 1357 comp_rx_cb = qed_ll2_rxq_completion; 1358 comp_tx_cb = qed_ll2_txq_completion; 1359 } 1360 1361 if (rx_num_desc) { 1362 qed_int_register_cb(p_hwfn, comp_rx_cb, 1363 &p_hwfn->p_ll2_info[i], 1364 &p_ll2_info->rx_queue.rx_sb_index, 1365 &p_ll2_info->rx_queue.p_fw_cons); 1366 p_ll2_info->rx_queue.b_cb_registred = true; 1367 } 1368 1369 if (tx_num_desc) { 1370 qed_int_register_cb(p_hwfn, 1371 comp_tx_cb, 1372 &p_hwfn->p_ll2_info[i], 1373 &p_ll2_info->tx_queue.tx_sb_index, 1374 &p_ll2_info->tx_queue.p_fw_cons); 1375 p_ll2_info->tx_queue.b_cb_registred = true; 1376 } 1377 1378 *p_connection_handle = i; 1379 return rc; 1380 1381 q_allocate_fail: 1382 qed_ll2_release_connection(p_hwfn, i); 1383 return -ENOMEM; 1384 } 1385 1386 static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn, 1387 struct qed_ll2_info *p_ll2_conn) 1388 { 1389 u8 action_on_error = 0; 1390 1391 if (!QED_LL2_RX_REGISTERED(p_ll2_conn)) 1392 return 0; 1393 1394 DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0); 1395 1396 SET_FIELD(action_on_error, 1397 CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, 1398 p_ll2_conn->conn.ai_err_packet_too_big); 1399 SET_FIELD(action_on_error, 1400 CORE_RX_ACTION_ON_ERROR_NO_BUFF, p_ll2_conn->conn.ai_err_no_buf); 1401 1402 return qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error); 1403 } 1404 1405 int qed_ll2_establish_connection(struct qed_hwfn *p_hwfn, u8 connection_handle) 1406 { 1407 struct qed_ll2_info *p_ll2_conn; 1408 struct qed_ll2_rx_queue *p_rx; 1409 struct qed_ll2_tx_queue *p_tx; 1410 int rc = -EINVAL; 1411 u32 i, capacity; 1412 u8 qid; 1413 1414 p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle); 1415 if (!p_ll2_conn) 1416 return -EINVAL; 1417 p_rx = &p_ll2_conn->rx_queue; 1418 p_tx = &p_ll2_conn->tx_queue; 1419 1420 qed_chain_reset(&p_rx->rxq_chain); 1421 qed_chain_reset(&p_rx->rcq_chain); 1422 INIT_LIST_HEAD(&p_rx->active_descq); 1423 INIT_LIST_HEAD(&p_rx->free_descq); 1424 INIT_LIST_HEAD(&p_rx->posting_descq); 1425 spin_lock_init(&p_rx->lock); 1426 capacity = qed_chain_get_capacity(&p_rx->rxq_chain); 1427 for (i = 0; i < capacity; i++) 1428 list_add_tail(&p_rx->descq_array[i].list_entry, 1429 &p_rx->free_descq); 1430 *p_rx->p_fw_cons = 0; 1431 1432 qed_chain_reset(&p_tx->txq_chain); 1433 INIT_LIST_HEAD(&p_tx->active_descq); 1434 INIT_LIST_HEAD(&p_tx->free_descq); 1435 INIT_LIST_HEAD(&p_tx->sending_descq); 1436 spin_lock_init(&p_tx->lock); 1437 capacity = qed_chain_get_capacity(&p_tx->txq_chain); 1438 for (i = 0; i < capacity; i++) 1439 list_add_tail(&p_tx->descq_array[i].list_entry, 1440 &p_tx->free_descq); 1441 p_tx->cur_completing_bd_idx = 0; 1442 p_tx->bds_idx = 0; 1443 p_tx->b_completing_packet = false; 1444 p_tx->cur_send_packet = NULL; 1445 p_tx->cur_send_frag_num = 0; 1446 p_tx->cur_completing_frag_num = 0; 1447 *p_tx->p_fw_cons = 0; 1448 1449 qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid); 1450 1451 qid = p_hwfn->hw_info.resc_start[QED_LL2_QUEUE] + connection_handle; 1452 p_ll2_conn->queue_id = qid; 1453 p_ll2_conn->tx_stats_id = qid; 1454 p_rx->set_prod_addr = (u8 __iomem *)p_hwfn->regview + 1455 GTT_BAR0_MAP_REG_TSDM_RAM + 1456 TSTORM_LL2_RX_PRODS_OFFSET(qid); 1457 p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells + 1458 qed_db_addr(p_ll2_conn->cid, 1459 DQ_DEMS_LEGACY); 1460 1461 rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn); 1462 if (rc) 1463 return rc; 1464 1465 rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn); 1466 if (rc) 1467 return rc; 1468 1469 if (p_hwfn->hw_info.personality != QED_PCI_ETH_ROCE) 1470 qed_wr(p_hwfn, p_hwfn->p_main_ptt, PRS_REG_USE_LIGHT_L2, 1); 1471 1472 qed_ll2_establish_connection_ooo(p_hwfn, p_ll2_conn); 1473 1474 if (p_ll2_conn->conn.conn_type == QED_LL2_TYPE_FCOE) { 1475 qed_llh_add_protocol_filter(p_hwfn, p_hwfn->p_main_ptt, 1476 0x8906, 0, 1477 QED_LLH_FILTER_ETHERTYPE); 1478 qed_llh_add_protocol_filter(p_hwfn, p_hwfn->p_main_ptt, 1479 0x8914, 0, 1480 QED_LLH_FILTER_ETHERTYPE); 1481 } 1482 1483 return rc; 1484 } 1485 1486 static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn, 1487 struct qed_ll2_rx_queue *p_rx, 1488 struct qed_ll2_rx_packet *p_curp) 1489 { 1490 struct qed_ll2_rx_packet *p_posting_packet = NULL; 1491 struct core_ll2_rx_prod rx_prod = { 0, 0, 0 }; 1492 bool b_notify_fw = false; 1493 u16 bd_prod, cq_prod; 1494 1495 /* This handles the flushing of already posted buffers */ 1496 while (!list_empty(&p_rx->posting_descq)) { 1497 p_posting_packet = list_first_entry(&p_rx->posting_descq, 1498 struct qed_ll2_rx_packet, 1499 list_entry); 1500 list_move_tail(&p_posting_packet->list_entry, 1501 &p_rx->active_descq); 1502 b_notify_fw = true; 1503 } 1504 1505 /* This handles the supplied packet [if there is one] */ 1506 if (p_curp) { 1507 list_add_tail(&p_curp->list_entry, &p_rx->active_descq); 1508 b_notify_fw = true; 1509 } 1510 1511 if (!b_notify_fw) 1512 return; 1513 1514 bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain); 1515 cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain); 1516 rx_prod.bd_prod = cpu_to_le16(bd_prod); 1517 rx_prod.cqe_prod = cpu_to_le16(cq_prod); 1518 DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod)); 1519 } 1520 1521 int qed_ll2_post_rx_buffer(struct qed_hwfn *p_hwfn, 1522 u8 connection_handle, 1523 dma_addr_t addr, 1524 u16 buf_len, void *cookie, u8 notify_fw) 1525 { 1526 struct core_rx_bd_with_buff_len *p_curb = NULL; 1527 struct qed_ll2_rx_packet *p_curp = NULL; 1528 struct qed_ll2_info *p_ll2_conn; 1529 struct qed_ll2_rx_queue *p_rx; 1530 unsigned long flags; 1531 void *p_data; 1532 int rc = 0; 1533 1534 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); 1535 if (!p_ll2_conn) 1536 return -EINVAL; 1537 p_rx = &p_ll2_conn->rx_queue; 1538 1539 spin_lock_irqsave(&p_rx->lock, flags); 1540 if (!list_empty(&p_rx->free_descq)) 1541 p_curp = list_first_entry(&p_rx->free_descq, 1542 struct qed_ll2_rx_packet, list_entry); 1543 if (p_curp) { 1544 if (qed_chain_get_elem_left(&p_rx->rxq_chain) && 1545 qed_chain_get_elem_left(&p_rx->rcq_chain)) { 1546 p_data = qed_chain_produce(&p_rx->rxq_chain); 1547 p_curb = (struct core_rx_bd_with_buff_len *)p_data; 1548 qed_chain_produce(&p_rx->rcq_chain); 1549 } 1550 } 1551 1552 /* If we're lacking entires, let's try to flush buffers to FW */ 1553 if (!p_curp || !p_curb) { 1554 rc = -EBUSY; 1555 p_curp = NULL; 1556 goto out_notify; 1557 } 1558 1559 /* We have an Rx packet we can fill */ 1560 DMA_REGPAIR_LE(p_curb->addr, addr); 1561 p_curb->buff_length = cpu_to_le16(buf_len); 1562 p_curp->rx_buf_addr = addr; 1563 p_curp->cookie = cookie; 1564 p_curp->rxq_bd = p_curb; 1565 p_curp->buf_length = buf_len; 1566 list_del(&p_curp->list_entry); 1567 1568 /* Check if we only want to enqueue this packet without informing FW */ 1569 if (!notify_fw) { 1570 list_add_tail(&p_curp->list_entry, &p_rx->posting_descq); 1571 goto out; 1572 } 1573 1574 out_notify: 1575 qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp); 1576 out: 1577 spin_unlock_irqrestore(&p_rx->lock, flags); 1578 return rc; 1579 } 1580 1581 static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn, 1582 struct qed_ll2_tx_queue *p_tx, 1583 struct qed_ll2_tx_packet *p_curp, 1584 u8 num_of_bds, 1585 dma_addr_t first_frag, 1586 u16 first_frag_len, void *p_cookie, 1587 u8 notify_fw) 1588 { 1589 list_del(&p_curp->list_entry); 1590 p_curp->cookie = p_cookie; 1591 p_curp->bd_used = num_of_bds; 1592 p_curp->notify_fw = notify_fw; 1593 p_tx->cur_send_packet = p_curp; 1594 p_tx->cur_send_frag_num = 0; 1595 1596 p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = first_frag; 1597 p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = first_frag_len; 1598 p_tx->cur_send_frag_num++; 1599 } 1600 1601 static void 1602 qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn, 1603 struct qed_ll2_info *p_ll2, 1604 struct qed_ll2_tx_packet *p_curp, 1605 u8 num_of_bds, 1606 enum core_tx_dest tx_dest, 1607 u16 vlan, 1608 u8 bd_flags, 1609 u16 l4_hdr_offset_w, 1610 enum core_roce_flavor_type roce_flavor, 1611 dma_addr_t first_frag, 1612 u16 first_frag_len) 1613 { 1614 struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain; 1615 u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain); 1616 struct core_tx_bd *start_bd = NULL; 1617 u16 bd_data = 0, frag_idx; 1618 1619 start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain); 1620 start_bd->nw_vlan_or_lb_echo = cpu_to_le16(vlan); 1621 SET_FIELD(start_bd->bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W, 1622 cpu_to_le16(l4_hdr_offset_w)); 1623 SET_FIELD(start_bd->bitfield1, CORE_TX_BD_TX_DST, tx_dest); 1624 bd_data |= bd_flags; 1625 SET_FIELD(bd_data, CORE_TX_BD_DATA_START_BD, 0x1); 1626 SET_FIELD(bd_data, CORE_TX_BD_DATA_NBDS, num_of_bds); 1627 SET_FIELD(bd_data, CORE_TX_BD_DATA_ROCE_FLAV, roce_flavor); 1628 start_bd->bd_data.as_bitfield = cpu_to_le16(bd_data); 1629 DMA_REGPAIR_LE(start_bd->addr, first_frag); 1630 start_bd->nbytes = cpu_to_le16(first_frag_len); 1631 1632 DP_VERBOSE(p_hwfn, 1633 (NETIF_MSG_TX_QUEUED | QED_MSG_LL2), 1634 "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", 1635 p_ll2->queue_id, 1636 p_ll2->cid, 1637 p_ll2->conn.conn_type, 1638 prod_idx, 1639 first_frag_len, 1640 num_of_bds, 1641 le32_to_cpu(start_bd->addr.hi), 1642 le32_to_cpu(start_bd->addr.lo)); 1643 1644 if (p_ll2->tx_queue.cur_send_frag_num == num_of_bds) 1645 return; 1646 1647 /* Need to provide the packet with additional BDs for frags */ 1648 for (frag_idx = p_ll2->tx_queue.cur_send_frag_num; 1649 frag_idx < num_of_bds; frag_idx++) { 1650 struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd; 1651 1652 *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain); 1653 (*p_bd)->bd_data.as_bitfield = 0; 1654 (*p_bd)->bitfield1 = 0; 1655 p_curp->bds_set[frag_idx].tx_frag = 0; 1656 p_curp->bds_set[frag_idx].frag_len = 0; 1657 } 1658 } 1659 1660 /* This should be called while the Txq spinlock is being held */ 1661 static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn, 1662 struct qed_ll2_info *p_ll2_conn) 1663 { 1664 bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw; 1665 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; 1666 struct qed_ll2_tx_packet *p_pkt = NULL; 1667 struct core_db_data db_msg = { 0, 0, 0 }; 1668 u16 bd_prod; 1669 1670 /* If there are missing BDs, don't do anything now */ 1671 if (p_ll2_conn->tx_queue.cur_send_frag_num != 1672 p_ll2_conn->tx_queue.cur_send_packet->bd_used) 1673 return; 1674 1675 /* Push the current packet to the list and clean after it */ 1676 list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry, 1677 &p_ll2_conn->tx_queue.sending_descq); 1678 p_ll2_conn->tx_queue.cur_send_packet = NULL; 1679 p_ll2_conn->tx_queue.cur_send_frag_num = 0; 1680 1681 /* Notify FW of packet only if requested to */ 1682 if (!b_notify) 1683 return; 1684 1685 bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain); 1686 1687 while (!list_empty(&p_tx->sending_descq)) { 1688 p_pkt = list_first_entry(&p_tx->sending_descq, 1689 struct qed_ll2_tx_packet, list_entry); 1690 if (!p_pkt) 1691 break; 1692 1693 list_move_tail(&p_pkt->list_entry, &p_tx->active_descq); 1694 } 1695 1696 SET_FIELD(db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM); 1697 SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET); 1698 SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_VAL_SEL, 1699 DQ_XCM_CORE_TX_BD_PROD_CMD); 1700 db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD; 1701 db_msg.spq_prod = cpu_to_le16(bd_prod); 1702 1703 /* Make sure the BDs data is updated before ringing the doorbell */ 1704 wmb(); 1705 1706 DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&db_msg)); 1707 1708 DP_VERBOSE(p_hwfn, 1709 (NETIF_MSG_TX_QUEUED | QED_MSG_LL2), 1710 "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n", 1711 p_ll2_conn->queue_id, 1712 p_ll2_conn->cid, p_ll2_conn->conn.conn_type, db_msg.spq_prod); 1713 } 1714 1715 int qed_ll2_prepare_tx_packet(struct qed_hwfn *p_hwfn, 1716 u8 connection_handle, 1717 u8 num_of_bds, 1718 u16 vlan, 1719 u8 bd_flags, 1720 u16 l4_hdr_offset_w, 1721 enum qed_ll2_tx_dest e_tx_dest, 1722 enum qed_ll2_roce_flavor_type qed_roce_flavor, 1723 dma_addr_t first_frag, 1724 u16 first_frag_len, void *cookie, u8 notify_fw) 1725 { 1726 struct qed_ll2_tx_packet *p_curp = NULL; 1727 struct qed_ll2_info *p_ll2_conn = NULL; 1728 enum core_roce_flavor_type roce_flavor; 1729 struct qed_ll2_tx_queue *p_tx; 1730 struct qed_chain *p_tx_chain; 1731 enum core_tx_dest tx_dest; 1732 unsigned long flags; 1733 int rc = 0; 1734 1735 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); 1736 if (!p_ll2_conn) 1737 return -EINVAL; 1738 p_tx = &p_ll2_conn->tx_queue; 1739 p_tx_chain = &p_tx->txq_chain; 1740 1741 if (num_of_bds > CORE_LL2_TX_MAX_BDS_PER_PACKET) 1742 return -EIO; 1743 1744 spin_lock_irqsave(&p_tx->lock, flags); 1745 if (p_tx->cur_send_packet) { 1746 rc = -EEXIST; 1747 goto out; 1748 } 1749 1750 /* Get entry, but only if we have tx elements for it */ 1751 if (!list_empty(&p_tx->free_descq)) 1752 p_curp = list_first_entry(&p_tx->free_descq, 1753 struct qed_ll2_tx_packet, list_entry); 1754 if (p_curp && qed_chain_get_elem_left(p_tx_chain) < num_of_bds) 1755 p_curp = NULL; 1756 1757 if (!p_curp) { 1758 rc = -EBUSY; 1759 goto out; 1760 } 1761 1762 tx_dest = e_tx_dest == QED_LL2_TX_DEST_NW ? CORE_TX_DEST_NW : 1763 CORE_TX_DEST_LB; 1764 if (qed_roce_flavor == QED_LL2_ROCE) { 1765 roce_flavor = CORE_ROCE; 1766 } else if (qed_roce_flavor == QED_LL2_RROCE) { 1767 roce_flavor = CORE_RROCE; 1768 } else { 1769 rc = -EINVAL; 1770 goto out; 1771 } 1772 1773 /* Prepare packet and BD, and perhaps send a doorbell to FW */ 1774 qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp, 1775 num_of_bds, first_frag, 1776 first_frag_len, cookie, notify_fw); 1777 qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp, 1778 num_of_bds, tx_dest, 1779 vlan, bd_flags, l4_hdr_offset_w, 1780 roce_flavor, 1781 first_frag, first_frag_len); 1782 1783 qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn); 1784 1785 out: 1786 spin_unlock_irqrestore(&p_tx->lock, flags); 1787 return rc; 1788 } 1789 1790 int qed_ll2_set_fragment_of_tx_packet(struct qed_hwfn *p_hwfn, 1791 u8 connection_handle, 1792 dma_addr_t addr, u16 nbytes) 1793 { 1794 struct qed_ll2_tx_packet *p_cur_send_packet = NULL; 1795 struct qed_ll2_info *p_ll2_conn = NULL; 1796 u16 cur_send_frag_num = 0; 1797 struct core_tx_bd *p_bd; 1798 unsigned long flags; 1799 1800 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); 1801 if (!p_ll2_conn) 1802 return -EINVAL; 1803 1804 if (!p_ll2_conn->tx_queue.cur_send_packet) 1805 return -EINVAL; 1806 1807 p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet; 1808 cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num; 1809 1810 if (cur_send_frag_num >= p_cur_send_packet->bd_used) 1811 return -EINVAL; 1812 1813 /* Fill the BD information, and possibly notify FW */ 1814 p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd; 1815 DMA_REGPAIR_LE(p_bd->addr, addr); 1816 p_bd->nbytes = cpu_to_le16(nbytes); 1817 p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr; 1818 p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes; 1819 1820 p_ll2_conn->tx_queue.cur_send_frag_num++; 1821 1822 spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags); 1823 qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn); 1824 spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags); 1825 1826 return 0; 1827 } 1828 1829 int qed_ll2_terminate_connection(struct qed_hwfn *p_hwfn, u8 connection_handle) 1830 { 1831 struct qed_ll2_info *p_ll2_conn = NULL; 1832 int rc = -EINVAL; 1833 1834 p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle); 1835 if (!p_ll2_conn) 1836 return -EINVAL; 1837 1838 /* Stop Tx & Rx of connection, if needed */ 1839 if (QED_LL2_TX_REGISTERED(p_ll2_conn)) { 1840 rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn); 1841 if (rc) 1842 return rc; 1843 qed_ll2_txq_flush(p_hwfn, connection_handle); 1844 } 1845 1846 if (QED_LL2_RX_REGISTERED(p_ll2_conn)) { 1847 rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn); 1848 if (rc) 1849 return rc; 1850 qed_ll2_rxq_flush(p_hwfn, connection_handle); 1851 } 1852 1853 if (p_ll2_conn->conn.conn_type == QED_LL2_TYPE_ISCSI_OOO) 1854 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info); 1855 1856 if (p_ll2_conn->conn.conn_type == QED_LL2_TYPE_FCOE) { 1857 qed_llh_remove_protocol_filter(p_hwfn, p_hwfn->p_main_ptt, 1858 0x8906, 0, 1859 QED_LLH_FILTER_ETHERTYPE); 1860 qed_llh_remove_protocol_filter(p_hwfn, p_hwfn->p_main_ptt, 1861 0x8914, 0, 1862 QED_LLH_FILTER_ETHERTYPE); 1863 } 1864 1865 return rc; 1866 } 1867 1868 void qed_ll2_release_connection(struct qed_hwfn *p_hwfn, u8 connection_handle) 1869 { 1870 struct qed_ll2_info *p_ll2_conn = NULL; 1871 1872 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); 1873 if (!p_ll2_conn) 1874 return; 1875 1876 if (QED_LL2_RX_REGISTERED(p_ll2_conn)) { 1877 p_ll2_conn->rx_queue.b_cb_registred = false; 1878 qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index); 1879 } 1880 1881 if (QED_LL2_TX_REGISTERED(p_ll2_conn)) { 1882 p_ll2_conn->tx_queue.b_cb_registred = false; 1883 qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index); 1884 } 1885 1886 kfree(p_ll2_conn->tx_queue.descq_array); 1887 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain); 1888 1889 kfree(p_ll2_conn->rx_queue.descq_array); 1890 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain); 1891 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain); 1892 1893 qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid); 1894 1895 qed_ll2_release_connection_ooo(p_hwfn, p_ll2_conn); 1896 1897 mutex_lock(&p_ll2_conn->mutex); 1898 p_ll2_conn->b_active = false; 1899 mutex_unlock(&p_ll2_conn->mutex); 1900 } 1901 1902 struct qed_ll2_info *qed_ll2_alloc(struct qed_hwfn *p_hwfn) 1903 { 1904 struct qed_ll2_info *p_ll2_connections; 1905 u8 i; 1906 1907 /* Allocate LL2's set struct */ 1908 p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS, 1909 sizeof(struct qed_ll2_info), GFP_KERNEL); 1910 if (!p_ll2_connections) { 1911 DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n"); 1912 return NULL; 1913 } 1914 1915 for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++) 1916 p_ll2_connections[i].my_id = i; 1917 1918 return p_ll2_connections; 1919 } 1920 1921 void qed_ll2_setup(struct qed_hwfn *p_hwfn, 1922 struct qed_ll2_info *p_ll2_connections) 1923 { 1924 int i; 1925 1926 for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++) 1927 mutex_init(&p_ll2_connections[i].mutex); 1928 } 1929 1930 void qed_ll2_free(struct qed_hwfn *p_hwfn, 1931 struct qed_ll2_info *p_ll2_connections) 1932 { 1933 kfree(p_ll2_connections); 1934 } 1935 1936 static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn, 1937 struct qed_ptt *p_ptt, 1938 struct qed_ll2_info *p_ll2_conn, 1939 struct qed_ll2_stats *p_stats) 1940 { 1941 struct core_ll2_tstorm_per_queue_stat tstats; 1942 u8 qid = p_ll2_conn->queue_id; 1943 u32 tstats_addr; 1944 1945 memset(&tstats, 0, sizeof(tstats)); 1946 tstats_addr = BAR0_MAP_REG_TSDM_RAM + 1947 CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid); 1948 qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats)); 1949 1950 p_stats->packet_too_big_discard = 1951 HILO_64_REGPAIR(tstats.packet_too_big_discard); 1952 p_stats->no_buff_discard = HILO_64_REGPAIR(tstats.no_buff_discard); 1953 } 1954 1955 static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn, 1956 struct qed_ptt *p_ptt, 1957 struct qed_ll2_info *p_ll2_conn, 1958 struct qed_ll2_stats *p_stats) 1959 { 1960 struct core_ll2_ustorm_per_queue_stat ustats; 1961 u8 qid = p_ll2_conn->queue_id; 1962 u32 ustats_addr; 1963 1964 memset(&ustats, 0, sizeof(ustats)); 1965 ustats_addr = BAR0_MAP_REG_USDM_RAM + 1966 CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid); 1967 qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats)); 1968 1969 p_stats->rcv_ucast_bytes = HILO_64_REGPAIR(ustats.rcv_ucast_bytes); 1970 p_stats->rcv_mcast_bytes = HILO_64_REGPAIR(ustats.rcv_mcast_bytes); 1971 p_stats->rcv_bcast_bytes = HILO_64_REGPAIR(ustats.rcv_bcast_bytes); 1972 p_stats->rcv_ucast_pkts = HILO_64_REGPAIR(ustats.rcv_ucast_pkts); 1973 p_stats->rcv_mcast_pkts = HILO_64_REGPAIR(ustats.rcv_mcast_pkts); 1974 p_stats->rcv_bcast_pkts = HILO_64_REGPAIR(ustats.rcv_bcast_pkts); 1975 } 1976 1977 static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn, 1978 struct qed_ptt *p_ptt, 1979 struct qed_ll2_info *p_ll2_conn, 1980 struct qed_ll2_stats *p_stats) 1981 { 1982 struct core_ll2_pstorm_per_queue_stat pstats; 1983 u8 stats_id = p_ll2_conn->tx_stats_id; 1984 u32 pstats_addr; 1985 1986 memset(&pstats, 0, sizeof(pstats)); 1987 pstats_addr = BAR0_MAP_REG_PSDM_RAM + 1988 CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id); 1989 qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats)); 1990 1991 p_stats->sent_ucast_bytes = HILO_64_REGPAIR(pstats.sent_ucast_bytes); 1992 p_stats->sent_mcast_bytes = HILO_64_REGPAIR(pstats.sent_mcast_bytes); 1993 p_stats->sent_bcast_bytes = HILO_64_REGPAIR(pstats.sent_bcast_bytes); 1994 p_stats->sent_ucast_pkts = HILO_64_REGPAIR(pstats.sent_ucast_pkts); 1995 p_stats->sent_mcast_pkts = HILO_64_REGPAIR(pstats.sent_mcast_pkts); 1996 p_stats->sent_bcast_pkts = HILO_64_REGPAIR(pstats.sent_bcast_pkts); 1997 } 1998 1999 int qed_ll2_get_stats(struct qed_hwfn *p_hwfn, 2000 u8 connection_handle, struct qed_ll2_stats *p_stats) 2001 { 2002 struct qed_ll2_info *p_ll2_conn = NULL; 2003 struct qed_ptt *p_ptt; 2004 2005 memset(p_stats, 0, sizeof(*p_stats)); 2006 2007 if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) || 2008 !p_hwfn->p_ll2_info) 2009 return -EINVAL; 2010 2011 p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle]; 2012 2013 p_ptt = qed_ptt_acquire(p_hwfn); 2014 if (!p_ptt) { 2015 DP_ERR(p_hwfn, "Failed to acquire ptt\n"); 2016 return -EINVAL; 2017 } 2018 2019 _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats); 2020 _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats); 2021 if (p_ll2_conn->tx_stats_en) 2022 _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats); 2023 2024 qed_ptt_release(p_hwfn, p_ptt); 2025 return 0; 2026 } 2027 2028 static void qed_ll2_register_cb_ops(struct qed_dev *cdev, 2029 const struct qed_ll2_cb_ops *ops, 2030 void *cookie) 2031 { 2032 cdev->ll2->cbs = ops; 2033 cdev->ll2->cb_cookie = cookie; 2034 } 2035 2036 static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params) 2037 { 2038 struct qed_ll2_conn ll2_info; 2039 struct qed_ll2_buffer *buffer, *tmp_buffer; 2040 enum qed_ll2_conn_type conn_type; 2041 struct qed_ptt *p_ptt; 2042 int rc, i; 2043 u8 gsi_enable = 1; 2044 2045 /* Initialize LL2 locks & lists */ 2046 INIT_LIST_HEAD(&cdev->ll2->list); 2047 spin_lock_init(&cdev->ll2->lock); 2048 cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN + 2049 L1_CACHE_BYTES + params->mtu; 2050 cdev->ll2->frags_mapped = params->frags_mapped; 2051 2052 /*Allocate memory for LL2 */ 2053 DP_INFO(cdev, "Allocating LL2 buffers of size %08x bytes\n", 2054 cdev->ll2->rx_size); 2055 for (i = 0; i < QED_LL2_RX_SIZE; i++) { 2056 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL); 2057 if (!buffer) { 2058 DP_INFO(cdev, "Failed to allocate LL2 buffers\n"); 2059 goto fail; 2060 } 2061 2062 rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data, 2063 &buffer->phys_addr); 2064 if (rc) { 2065 kfree(buffer); 2066 goto fail; 2067 } 2068 2069 list_add_tail(&buffer->list, &cdev->ll2->list); 2070 } 2071 2072 switch (QED_LEADING_HWFN(cdev)->hw_info.personality) { 2073 case QED_PCI_FCOE: 2074 conn_type = QED_LL2_TYPE_FCOE; 2075 gsi_enable = 0; 2076 break; 2077 case QED_PCI_ISCSI: 2078 conn_type = QED_LL2_TYPE_ISCSI; 2079 gsi_enable = 0; 2080 break; 2081 case QED_PCI_ETH_ROCE: 2082 conn_type = QED_LL2_TYPE_ROCE; 2083 break; 2084 default: 2085 conn_type = QED_LL2_TYPE_TEST; 2086 } 2087 2088 /* Prepare the temporary ll2 information */ 2089 memset(&ll2_info, 0, sizeof(ll2_info)); 2090 2091 ll2_info.conn_type = conn_type; 2092 ll2_info.mtu = params->mtu; 2093 ll2_info.rx_drop_ttl0_flg = params->drop_ttl0_packets; 2094 ll2_info.rx_vlan_removal_en = params->rx_vlan_stripping; 2095 ll2_info.tx_tc = 0; 2096 ll2_info.tx_dest = CORE_TX_DEST_NW; 2097 ll2_info.gsi_enable = gsi_enable; 2098 2099 rc = qed_ll2_acquire_connection(QED_LEADING_HWFN(cdev), &ll2_info, 2100 QED_LL2_RX_SIZE, QED_LL2_TX_SIZE, 2101 &cdev->ll2->handle); 2102 if (rc) { 2103 DP_INFO(cdev, "Failed to acquire LL2 connection\n"); 2104 goto fail; 2105 } 2106 2107 rc = qed_ll2_establish_connection(QED_LEADING_HWFN(cdev), 2108 cdev->ll2->handle); 2109 if (rc) { 2110 DP_INFO(cdev, "Failed to establish LL2 connection\n"); 2111 goto release_fail; 2112 } 2113 2114 /* Post all Rx buffers to FW */ 2115 spin_lock_bh(&cdev->ll2->lock); 2116 list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) { 2117 rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev), 2118 cdev->ll2->handle, 2119 buffer->phys_addr, 0, buffer, 1); 2120 if (rc) { 2121 DP_INFO(cdev, 2122 "Failed to post an Rx buffer; Deleting it\n"); 2123 dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr, 2124 cdev->ll2->rx_size, DMA_FROM_DEVICE); 2125 kfree(buffer->data); 2126 list_del(&buffer->list); 2127 kfree(buffer); 2128 } else { 2129 cdev->ll2->rx_cnt++; 2130 } 2131 } 2132 spin_unlock_bh(&cdev->ll2->lock); 2133 2134 if (!cdev->ll2->rx_cnt) { 2135 DP_INFO(cdev, "Failed passing even a single Rx buffer\n"); 2136 goto release_terminate; 2137 } 2138 2139 if (!is_valid_ether_addr(params->ll2_mac_address)) { 2140 DP_INFO(cdev, "Invalid Ethernet address\n"); 2141 goto release_terminate; 2142 } 2143 2144 if (cdev->hwfns[0].hw_info.personality == QED_PCI_ISCSI && 2145 cdev->hwfns[0].pf_params.iscsi_pf_params.ooo_enable) { 2146 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Starting OOO LL2 queue\n"); 2147 rc = qed_ll2_start_ooo(cdev, params); 2148 if (rc) { 2149 DP_INFO(cdev, 2150 "Failed to initialize the OOO LL2 queue\n"); 2151 goto release_terminate; 2152 } 2153 } 2154 2155 p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev)); 2156 if (!p_ptt) { 2157 DP_INFO(cdev, "Failed to acquire PTT\n"); 2158 goto release_terminate; 2159 } 2160 2161 rc = qed_llh_add_mac_filter(QED_LEADING_HWFN(cdev), p_ptt, 2162 params->ll2_mac_address); 2163 qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt); 2164 if (rc) { 2165 DP_ERR(cdev, "Failed to allocate LLH filter\n"); 2166 goto release_terminate_all; 2167 } 2168 2169 ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address); 2170 return 0; 2171 2172 release_terminate_all: 2173 2174 release_terminate: 2175 qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle); 2176 release_fail: 2177 qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle); 2178 fail: 2179 qed_ll2_kill_buffers(cdev); 2180 cdev->ll2->handle = QED_LL2_UNUSED_HANDLE; 2181 return -EINVAL; 2182 } 2183 2184 static int qed_ll2_stop(struct qed_dev *cdev) 2185 { 2186 struct qed_ptt *p_ptt; 2187 int rc; 2188 2189 if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE) 2190 return 0; 2191 2192 p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev)); 2193 if (!p_ptt) { 2194 DP_INFO(cdev, "Failed to acquire PTT\n"); 2195 goto fail; 2196 } 2197 2198 qed_llh_remove_mac_filter(QED_LEADING_HWFN(cdev), p_ptt, 2199 cdev->ll2_mac_address); 2200 qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt); 2201 eth_zero_addr(cdev->ll2_mac_address); 2202 2203 if (cdev->hwfns[0].hw_info.personality == QED_PCI_ISCSI && 2204 cdev->hwfns[0].pf_params.iscsi_pf_params.ooo_enable) 2205 qed_ll2_stop_ooo(cdev); 2206 2207 rc = qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), 2208 cdev->ll2->handle); 2209 if (rc) 2210 DP_INFO(cdev, "Failed to terminate LL2 connection\n"); 2211 2212 qed_ll2_kill_buffers(cdev); 2213 2214 qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle); 2215 cdev->ll2->handle = QED_LL2_UNUSED_HANDLE; 2216 2217 return rc; 2218 fail: 2219 return -EINVAL; 2220 } 2221 2222 static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb) 2223 { 2224 const skb_frag_t *frag; 2225 int rc = -EINVAL, i; 2226 dma_addr_t mapping; 2227 u16 vlan = 0; 2228 u8 flags = 0; 2229 2230 if (unlikely(skb->ip_summed != CHECKSUM_NONE)) { 2231 DP_INFO(cdev, "Cannot transmit a checksumed packet\n"); 2232 return -EINVAL; 2233 } 2234 2235 if (1 + skb_shinfo(skb)->nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET) { 2236 DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n", 2237 1 + skb_shinfo(skb)->nr_frags); 2238 return -EINVAL; 2239 } 2240 2241 mapping = dma_map_single(&cdev->pdev->dev, skb->data, 2242 skb->len, DMA_TO_DEVICE); 2243 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) { 2244 DP_NOTICE(cdev, "SKB mapping failed\n"); 2245 return -EINVAL; 2246 } 2247 2248 /* Request HW to calculate IP csum */ 2249 if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) && 2250 ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6)) 2251 flags |= BIT(CORE_TX_BD_DATA_IP_CSUM_SHIFT); 2252 2253 if (skb_vlan_tag_present(skb)) { 2254 vlan = skb_vlan_tag_get(skb); 2255 flags |= BIT(CORE_TX_BD_DATA_VLAN_INSERTION_SHIFT); 2256 } 2257 2258 rc = qed_ll2_prepare_tx_packet(QED_LEADING_HWFN(cdev), 2259 cdev->ll2->handle, 2260 1 + skb_shinfo(skb)->nr_frags, 2261 vlan, flags, 0, QED_LL2_TX_DEST_NW, 2262 0 /* RoCE FLAVOR */, 2263 mapping, skb->len, skb, 1); 2264 if (rc) 2265 goto err; 2266 2267 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 2268 frag = &skb_shinfo(skb)->frags[i]; 2269 if (!cdev->ll2->frags_mapped) { 2270 mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0, 2271 skb_frag_size(frag), 2272 DMA_TO_DEVICE); 2273 2274 if (unlikely(dma_mapping_error(&cdev->pdev->dev, 2275 mapping))) { 2276 DP_NOTICE(cdev, 2277 "Unable to map frag - dropping packet\n"); 2278 rc = -ENOMEM; 2279 goto err; 2280 } 2281 } else { 2282 mapping = page_to_phys(skb_frag_page(frag)) | 2283 frag->page_offset; 2284 } 2285 2286 rc = qed_ll2_set_fragment_of_tx_packet(QED_LEADING_HWFN(cdev), 2287 cdev->ll2->handle, 2288 mapping, 2289 skb_frag_size(frag)); 2290 2291 /* if failed not much to do here, partial packet has been posted 2292 * we can't free memory, will need to wait for completion. 2293 */ 2294 if (rc) 2295 goto err2; 2296 } 2297 2298 return 0; 2299 2300 err: 2301 dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE); 2302 2303 err2: 2304 return rc; 2305 } 2306 2307 static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats) 2308 { 2309 if (!cdev->ll2) 2310 return -EINVAL; 2311 2312 return qed_ll2_get_stats(QED_LEADING_HWFN(cdev), 2313 cdev->ll2->handle, stats); 2314 } 2315 2316 const struct qed_ll2_ops qed_ll2_ops_pass = { 2317 .start = &qed_ll2_start, 2318 .stop = &qed_ll2_stop, 2319 .start_xmit = &qed_ll2_start_xmit, 2320 .register_cb_ops = &qed_ll2_register_cb_ops, 2321 .get_stats = &qed_ll2_stats, 2322 }; 2323 2324 int qed_ll2_alloc_if(struct qed_dev *cdev) 2325 { 2326 cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL); 2327 return cdev->ll2 ? 0 : -ENOMEM; 2328 } 2329 2330 void qed_ll2_dealloc_if(struct qed_dev *cdev) 2331 { 2332 kfree(cdev->ll2); 2333 cdev->ll2 = NULL; 2334 } 2335