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 DP_INFO(cdev, "Failed to build SKB\n"); 205 kfree(buffer->data); 206 goto out_post1; 207 } 208 209 data->u.placement_offset += NET_SKB_PAD; 210 skb_reserve(skb, data->u.placement_offset); 211 skb_put(skb, data->length.packet_length); 212 skb_checksum_none_assert(skb); 213 214 /* Get parital ethernet information instead of eth_type_trans(), 215 * Since we don't have an associated net_device. 216 */ 217 skb_reset_mac_header(skb); 218 skb->protocol = eth_hdr(skb)->h_proto; 219 220 /* Pass SKB onward */ 221 if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) { 222 if (data->vlan) 223 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 224 data->vlan); 225 cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb, 226 data->opaque_data_0, 227 data->opaque_data_1); 228 } else { 229 DP_VERBOSE(p_hwfn, (NETIF_MSG_RX_STATUS | NETIF_MSG_PKTDATA | 230 QED_MSG_LL2 | QED_MSG_STORAGE), 231 "Dropping the packet\n"); 232 kfree(buffer->data); 233 } 234 235 out_post1: 236 /* Update Buffer information and update FW producer */ 237 buffer->data = new_data; 238 buffer->phys_addr = new_phys_addr; 239 240 out_post: 241 rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev), cdev->ll2->handle, 242 buffer->phys_addr, 0, buffer, 1); 243 244 if (rc) 245 qed_ll2_dealloc_buffer(cdev, buffer); 246 } 247 248 static struct qed_ll2_info *__qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn, 249 u8 connection_handle, 250 bool b_lock, 251 bool b_only_active) 252 { 253 struct qed_ll2_info *p_ll2_conn, *p_ret = NULL; 254 255 if (connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) 256 return NULL; 257 258 if (!p_hwfn->p_ll2_info) 259 return NULL; 260 261 p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle]; 262 263 if (b_only_active) { 264 if (b_lock) 265 mutex_lock(&p_ll2_conn->mutex); 266 if (p_ll2_conn->b_active) 267 p_ret = p_ll2_conn; 268 if (b_lock) 269 mutex_unlock(&p_ll2_conn->mutex); 270 } else { 271 p_ret = p_ll2_conn; 272 } 273 274 return p_ret; 275 } 276 277 static struct qed_ll2_info *qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn, 278 u8 connection_handle) 279 { 280 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, true); 281 } 282 283 static struct qed_ll2_info *qed_ll2_handle_sanity_lock(struct qed_hwfn *p_hwfn, 284 u8 connection_handle) 285 { 286 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, true, true); 287 } 288 289 static struct qed_ll2_info *qed_ll2_handle_sanity_inactive(struct qed_hwfn 290 *p_hwfn, 291 u8 connection_handle) 292 { 293 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, false); 294 } 295 296 static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle) 297 { 298 bool b_last_packet = false, b_last_frag = false; 299 struct qed_ll2_tx_packet *p_pkt = NULL; 300 struct qed_ll2_info *p_ll2_conn; 301 struct qed_ll2_tx_queue *p_tx; 302 unsigned long flags = 0; 303 dma_addr_t tx_frag; 304 305 p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle); 306 if (!p_ll2_conn) 307 return; 308 309 p_tx = &p_ll2_conn->tx_queue; 310 311 spin_lock_irqsave(&p_tx->lock, flags); 312 while (!list_empty(&p_tx->active_descq)) { 313 p_pkt = list_first_entry(&p_tx->active_descq, 314 struct qed_ll2_tx_packet, list_entry); 315 if (!p_pkt) 316 break; 317 318 list_del(&p_pkt->list_entry); 319 b_last_packet = list_empty(&p_tx->active_descq); 320 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq); 321 spin_unlock_irqrestore(&p_tx->lock, flags); 322 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) { 323 struct qed_ooo_buffer *p_buffer; 324 325 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie; 326 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, 327 p_buffer); 328 } else { 329 p_tx->cur_completing_packet = *p_pkt; 330 p_tx->cur_completing_bd_idx = 1; 331 b_last_frag = 332 p_tx->cur_completing_bd_idx == p_pkt->bd_used; 333 tx_frag = p_pkt->bds_set[0].tx_frag; 334 p_ll2_conn->cbs.tx_release_cb(p_ll2_conn->cbs.cookie, 335 p_ll2_conn->my_id, 336 p_pkt->cookie, 337 tx_frag, 338 b_last_frag, 339 b_last_packet); 340 } 341 spin_lock_irqsave(&p_tx->lock, flags); 342 } 343 spin_unlock_irqrestore(&p_tx->lock, flags); 344 } 345 346 static int qed_ll2_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie) 347 { 348 struct qed_ll2_info *p_ll2_conn = p_cookie; 349 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; 350 u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0; 351 struct qed_ll2_tx_packet *p_pkt; 352 bool b_last_frag = false; 353 unsigned long flags; 354 int rc = -EINVAL; 355 356 spin_lock_irqsave(&p_tx->lock, flags); 357 if (p_tx->b_completing_packet) { 358 rc = -EBUSY; 359 goto out; 360 } 361 362 new_idx = le16_to_cpu(*p_tx->p_fw_cons); 363 num_bds = ((s16)new_idx - (s16)p_tx->bds_idx); 364 while (num_bds) { 365 if (list_empty(&p_tx->active_descq)) 366 goto out; 367 368 p_pkt = list_first_entry(&p_tx->active_descq, 369 struct qed_ll2_tx_packet, list_entry); 370 if (!p_pkt) 371 goto out; 372 373 p_tx->b_completing_packet = true; 374 p_tx->cur_completing_packet = *p_pkt; 375 num_bds_in_packet = p_pkt->bd_used; 376 list_del(&p_pkt->list_entry); 377 378 if (num_bds < num_bds_in_packet) { 379 DP_NOTICE(p_hwfn, 380 "Rest of BDs does not cover whole packet\n"); 381 goto out; 382 } 383 384 num_bds -= num_bds_in_packet; 385 p_tx->bds_idx += num_bds_in_packet; 386 while (num_bds_in_packet--) 387 qed_chain_consume(&p_tx->txq_chain); 388 389 p_tx->cur_completing_bd_idx = 1; 390 b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used; 391 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq); 392 393 spin_unlock_irqrestore(&p_tx->lock, flags); 394 395 p_ll2_conn->cbs.tx_comp_cb(p_ll2_conn->cbs.cookie, 396 p_ll2_conn->my_id, 397 p_pkt->cookie, 398 p_pkt->bds_set[0].tx_frag, 399 b_last_frag, !num_bds); 400 401 spin_lock_irqsave(&p_tx->lock, flags); 402 } 403 404 p_tx->b_completing_packet = false; 405 rc = 0; 406 out: 407 spin_unlock_irqrestore(&p_tx->lock, flags); 408 return rc; 409 } 410 411 static void qed_ll2_rxq_parse_gsi(struct qed_hwfn *p_hwfn, 412 union core_rx_cqe_union *p_cqe, 413 struct qed_ll2_comp_rx_data *data) 414 { 415 data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_gsi.parse_flags.flags); 416 data->length.data_length = le16_to_cpu(p_cqe->rx_cqe_gsi.data_length); 417 data->vlan = le16_to_cpu(p_cqe->rx_cqe_gsi.vlan); 418 data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrhi); 419 data->opaque_data_1 = le16_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrlo); 420 data->u.data_length_error = p_cqe->rx_cqe_gsi.data_length_error; 421 data->qp_id = le16_to_cpu(p_cqe->rx_cqe_gsi.qp_id); 422 423 data->src_qp = le32_to_cpu(p_cqe->rx_cqe_gsi.src_qp); 424 } 425 426 static void qed_ll2_rxq_parse_reg(struct qed_hwfn *p_hwfn, 427 union core_rx_cqe_union *p_cqe, 428 struct qed_ll2_comp_rx_data *data) 429 { 430 data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_fp.parse_flags.flags); 431 data->err_flags = le16_to_cpu(p_cqe->rx_cqe_fp.err_flags.flags); 432 data->length.packet_length = 433 le16_to_cpu(p_cqe->rx_cqe_fp.packet_length); 434 data->vlan = le16_to_cpu(p_cqe->rx_cqe_fp.vlan); 435 data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[0]); 436 data->opaque_data_1 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[1]); 437 data->u.placement_offset = p_cqe->rx_cqe_fp.placement_offset; 438 } 439 440 static int 441 qed_ll2_handle_slowpath(struct qed_hwfn *p_hwfn, 442 struct qed_ll2_info *p_ll2_conn, 443 union core_rx_cqe_union *p_cqe, 444 unsigned long *p_lock_flags) 445 { 446 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; 447 struct core_rx_slow_path_cqe *sp_cqe; 448 449 sp_cqe = &p_cqe->rx_cqe_sp; 450 if (sp_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH) { 451 DP_NOTICE(p_hwfn, 452 "LL2 - unexpected Rx CQE slowpath ramrod_cmd_id:%d\n", 453 sp_cqe->ramrod_cmd_id); 454 return -EINVAL; 455 } 456 457 if (!p_ll2_conn->cbs.slowpath_cb) { 458 DP_NOTICE(p_hwfn, 459 "LL2 - received RX_QUEUE_FLUSH but no callback was provided\n"); 460 return -EINVAL; 461 } 462 463 spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags); 464 465 p_ll2_conn->cbs.slowpath_cb(p_ll2_conn->cbs.cookie, 466 p_ll2_conn->my_id, 467 le32_to_cpu(sp_cqe->opaque_data.data[0]), 468 le32_to_cpu(sp_cqe->opaque_data.data[1])); 469 470 spin_lock_irqsave(&p_rx->lock, *p_lock_flags); 471 472 return 0; 473 } 474 475 static int 476 qed_ll2_rxq_handle_completion(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, bool b_last_cqe) 480 { 481 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; 482 struct qed_ll2_rx_packet *p_pkt = NULL; 483 struct qed_ll2_comp_rx_data data; 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 "[%d] LL2 Rx completion but active_descq is empty\n", 491 p_ll2_conn->input.conn_type); 492 493 return -EIO; 494 } 495 list_del(&p_pkt->list_entry); 496 497 if (p_cqe->rx_cqe_sp.type == CORE_RX_CQE_TYPE_REGULAR) 498 qed_ll2_rxq_parse_reg(p_hwfn, p_cqe, &data); 499 else 500 qed_ll2_rxq_parse_gsi(p_hwfn, p_cqe, &data); 501 if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd) 502 DP_NOTICE(p_hwfn, 503 "Mismatch between active_descq and the LL2 Rx chain\n"); 504 505 list_add_tail(&p_pkt->list_entry, &p_rx->free_descq); 506 507 data.connection_handle = p_ll2_conn->my_id; 508 data.cookie = p_pkt->cookie; 509 data.rx_buf_addr = p_pkt->rx_buf_addr; 510 data.b_last_packet = b_last_cqe; 511 512 spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags); 513 p_ll2_conn->cbs.rx_comp_cb(p_ll2_conn->cbs.cookie, &data); 514 515 spin_lock_irqsave(&p_rx->lock, *p_lock_flags); 516 517 return 0; 518 } 519 520 static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie) 521 { 522 struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)cookie; 523 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; 524 union core_rx_cqe_union *cqe = NULL; 525 u16 cq_new_idx = 0, cq_old_idx = 0; 526 unsigned long flags = 0; 527 int rc = 0; 528 529 spin_lock_irqsave(&p_rx->lock, flags); 530 cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons); 531 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain); 532 533 while (cq_new_idx != cq_old_idx) { 534 bool b_last_cqe = (cq_new_idx == cq_old_idx); 535 536 cqe = 537 (union core_rx_cqe_union *) 538 qed_chain_consume(&p_rx->rcq_chain); 539 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain); 540 541 DP_VERBOSE(p_hwfn, 542 QED_MSG_LL2, 543 "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n", 544 cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type); 545 546 switch (cqe->rx_cqe_sp.type) { 547 case CORE_RX_CQE_TYPE_SLOW_PATH: 548 rc = qed_ll2_handle_slowpath(p_hwfn, p_ll2_conn, 549 cqe, &flags); 550 break; 551 case CORE_RX_CQE_TYPE_GSI_OFFLOAD: 552 case CORE_RX_CQE_TYPE_REGULAR: 553 rc = qed_ll2_rxq_handle_completion(p_hwfn, p_ll2_conn, 554 cqe, &flags, 555 b_last_cqe); 556 break; 557 default: 558 rc = -EIO; 559 } 560 } 561 562 spin_unlock_irqrestore(&p_rx->lock, flags); 563 return rc; 564 } 565 566 static void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle) 567 { 568 struct qed_ll2_info *p_ll2_conn = NULL; 569 struct qed_ll2_rx_packet *p_pkt = NULL; 570 struct qed_ll2_rx_queue *p_rx; 571 unsigned long flags = 0; 572 573 p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle); 574 if (!p_ll2_conn) 575 return; 576 577 p_rx = &p_ll2_conn->rx_queue; 578 579 spin_lock_irqsave(&p_rx->lock, flags); 580 while (!list_empty(&p_rx->active_descq)) { 581 p_pkt = list_first_entry(&p_rx->active_descq, 582 struct qed_ll2_rx_packet, list_entry); 583 if (!p_pkt) 584 break; 585 list_move_tail(&p_pkt->list_entry, &p_rx->free_descq); 586 spin_unlock_irqrestore(&p_rx->lock, flags); 587 588 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) { 589 struct qed_ooo_buffer *p_buffer; 590 591 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie; 592 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, 593 p_buffer); 594 } else { 595 dma_addr_t rx_buf_addr = p_pkt->rx_buf_addr; 596 void *cookie = p_pkt->cookie; 597 bool b_last; 598 599 b_last = list_empty(&p_rx->active_descq); 600 p_ll2_conn->cbs.rx_release_cb(p_ll2_conn->cbs.cookie, 601 p_ll2_conn->my_id, 602 cookie, 603 rx_buf_addr, b_last); 604 } 605 spin_lock_irqsave(&p_rx->lock, flags); 606 } 607 spin_unlock_irqrestore(&p_rx->lock, flags); 608 } 609 610 static bool 611 qed_ll2_lb_rxq_handler_slowpath(struct qed_hwfn *p_hwfn, 612 struct core_rx_slow_path_cqe *p_cqe) 613 { 614 struct ooo_opaque *iscsi_ooo; 615 u32 cid; 616 617 if (p_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH) 618 return false; 619 620 iscsi_ooo = (struct ooo_opaque *)&p_cqe->opaque_data; 621 if (iscsi_ooo->ooo_opcode != TCP_EVENT_DELETE_ISLES) 622 return false; 623 624 /* Need to make a flush */ 625 cid = le32_to_cpu(iscsi_ooo->cid); 626 qed_ooo_release_connection_isles(p_hwfn, p_hwfn->p_ooo_info, cid); 627 628 return true; 629 } 630 631 static int qed_ll2_lb_rxq_handler(struct qed_hwfn *p_hwfn, 632 struct qed_ll2_info *p_ll2_conn) 633 { 634 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; 635 u16 packet_length = 0, parse_flags = 0, vlan = 0; 636 struct qed_ll2_rx_packet *p_pkt = NULL; 637 u32 num_ooo_add_to_peninsula = 0, cid; 638 union core_rx_cqe_union *cqe = NULL; 639 u16 cq_new_idx = 0, cq_old_idx = 0; 640 struct qed_ooo_buffer *p_buffer; 641 struct ooo_opaque *iscsi_ooo; 642 u8 placement_offset = 0; 643 u8 cqe_type; 644 645 cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons); 646 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain); 647 if (cq_new_idx == cq_old_idx) 648 return 0; 649 650 while (cq_new_idx != cq_old_idx) { 651 struct core_rx_fast_path_cqe *p_cqe_fp; 652 653 cqe = qed_chain_consume(&p_rx->rcq_chain); 654 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain); 655 cqe_type = cqe->rx_cqe_sp.type; 656 657 if (cqe_type == CORE_RX_CQE_TYPE_SLOW_PATH) 658 if (qed_ll2_lb_rxq_handler_slowpath(p_hwfn, 659 &cqe->rx_cqe_sp)) 660 continue; 661 662 if (cqe_type != CORE_RX_CQE_TYPE_REGULAR) { 663 DP_NOTICE(p_hwfn, 664 "Got a non-regular LB LL2 completion [type 0x%02x]\n", 665 cqe_type); 666 return -EINVAL; 667 } 668 p_cqe_fp = &cqe->rx_cqe_fp; 669 670 placement_offset = p_cqe_fp->placement_offset; 671 parse_flags = le16_to_cpu(p_cqe_fp->parse_flags.flags); 672 packet_length = le16_to_cpu(p_cqe_fp->packet_length); 673 vlan = le16_to_cpu(p_cqe_fp->vlan); 674 iscsi_ooo = (struct ooo_opaque *)&p_cqe_fp->opaque_data; 675 qed_ooo_save_history_entry(p_hwfn, p_hwfn->p_ooo_info, 676 iscsi_ooo); 677 cid = le32_to_cpu(iscsi_ooo->cid); 678 679 /* Process delete isle first */ 680 if (iscsi_ooo->drop_size) 681 qed_ooo_delete_isles(p_hwfn, p_hwfn->p_ooo_info, cid, 682 iscsi_ooo->drop_isle, 683 iscsi_ooo->drop_size); 684 685 if (iscsi_ooo->ooo_opcode == TCP_EVENT_NOP) 686 continue; 687 688 /* Now process create/add/join isles */ 689 if (list_empty(&p_rx->active_descq)) { 690 DP_NOTICE(p_hwfn, 691 "LL2 OOO RX chain has no submitted buffers\n" 692 ); 693 return -EIO; 694 } 695 696 p_pkt = list_first_entry(&p_rx->active_descq, 697 struct qed_ll2_rx_packet, list_entry); 698 699 if ((iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_NEW_ISLE) || 700 (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_RIGHT) || 701 (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_LEFT) || 702 (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_PEN) || 703 (iscsi_ooo->ooo_opcode == TCP_EVENT_JOIN)) { 704 if (!p_pkt) { 705 DP_NOTICE(p_hwfn, 706 "LL2 OOO RX packet is not valid\n"); 707 return -EIO; 708 } 709 list_del(&p_pkt->list_entry); 710 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie; 711 p_buffer->packet_length = packet_length; 712 p_buffer->parse_flags = parse_flags; 713 p_buffer->vlan = vlan; 714 p_buffer->placement_offset = placement_offset; 715 qed_chain_consume(&p_rx->rxq_chain); 716 list_add_tail(&p_pkt->list_entry, &p_rx->free_descq); 717 718 switch (iscsi_ooo->ooo_opcode) { 719 case TCP_EVENT_ADD_NEW_ISLE: 720 qed_ooo_add_new_isle(p_hwfn, 721 p_hwfn->p_ooo_info, 722 cid, 723 iscsi_ooo->ooo_isle, 724 p_buffer); 725 break; 726 case TCP_EVENT_ADD_ISLE_RIGHT: 727 qed_ooo_add_new_buffer(p_hwfn, 728 p_hwfn->p_ooo_info, 729 cid, 730 iscsi_ooo->ooo_isle, 731 p_buffer, 732 QED_OOO_RIGHT_BUF); 733 break; 734 case TCP_EVENT_ADD_ISLE_LEFT: 735 qed_ooo_add_new_buffer(p_hwfn, 736 p_hwfn->p_ooo_info, 737 cid, 738 iscsi_ooo->ooo_isle, 739 p_buffer, 740 QED_OOO_LEFT_BUF); 741 break; 742 case TCP_EVENT_JOIN: 743 qed_ooo_add_new_buffer(p_hwfn, 744 p_hwfn->p_ooo_info, 745 cid, 746 iscsi_ooo->ooo_isle + 747 1, 748 p_buffer, 749 QED_OOO_LEFT_BUF); 750 qed_ooo_join_isles(p_hwfn, 751 p_hwfn->p_ooo_info, 752 cid, iscsi_ooo->ooo_isle); 753 break; 754 case TCP_EVENT_ADD_PEN: 755 num_ooo_add_to_peninsula++; 756 qed_ooo_put_ready_buffer(p_hwfn, 757 p_hwfn->p_ooo_info, 758 p_buffer, true); 759 break; 760 } 761 } else { 762 DP_NOTICE(p_hwfn, 763 "Unexpected event (%d) TX OOO completion\n", 764 iscsi_ooo->ooo_opcode); 765 } 766 } 767 768 return 0; 769 } 770 771 static void 772 qed_ooo_submit_tx_buffers(struct qed_hwfn *p_hwfn, 773 struct qed_ll2_info *p_ll2_conn) 774 { 775 struct qed_ll2_tx_pkt_info tx_pkt; 776 struct qed_ooo_buffer *p_buffer; 777 u16 l4_hdr_offset_w; 778 dma_addr_t first_frag; 779 u8 bd_flags; 780 int rc; 781 782 /* Submit Tx buffers here */ 783 while ((p_buffer = qed_ooo_get_ready_buffer(p_hwfn, 784 p_hwfn->p_ooo_info))) { 785 l4_hdr_offset_w = 0; 786 bd_flags = 0; 787 788 first_frag = p_buffer->rx_buffer_phys_addr + 789 p_buffer->placement_offset; 790 SET_FIELD(bd_flags, CORE_TX_BD_DATA_FORCE_VLAN_MODE, 1); 791 SET_FIELD(bd_flags, CORE_TX_BD_DATA_L4_PROTOCOL, 1); 792 793 memset(&tx_pkt, 0, sizeof(tx_pkt)); 794 tx_pkt.num_of_bds = 1; 795 tx_pkt.vlan = p_buffer->vlan; 796 tx_pkt.bd_flags = bd_flags; 797 tx_pkt.l4_hdr_offset_w = l4_hdr_offset_w; 798 tx_pkt.tx_dest = p_ll2_conn->tx_dest; 799 tx_pkt.first_frag = first_frag; 800 tx_pkt.first_frag_len = p_buffer->packet_length; 801 tx_pkt.cookie = p_buffer; 802 803 rc = qed_ll2_prepare_tx_packet(p_hwfn, p_ll2_conn->my_id, 804 &tx_pkt, true); 805 if (rc) { 806 qed_ooo_put_ready_buffer(p_hwfn, p_hwfn->p_ooo_info, 807 p_buffer, false); 808 break; 809 } 810 } 811 } 812 813 static void 814 qed_ooo_submit_rx_buffers(struct qed_hwfn *p_hwfn, 815 struct qed_ll2_info *p_ll2_conn) 816 { 817 struct qed_ooo_buffer *p_buffer; 818 int rc; 819 820 while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn, 821 p_hwfn->p_ooo_info))) { 822 rc = qed_ll2_post_rx_buffer(p_hwfn, 823 p_ll2_conn->my_id, 824 p_buffer->rx_buffer_phys_addr, 825 0, p_buffer, true); 826 if (rc) { 827 qed_ooo_put_free_buffer(p_hwfn, 828 p_hwfn->p_ooo_info, p_buffer); 829 break; 830 } 831 } 832 } 833 834 static int qed_ll2_lb_rxq_completion(struct qed_hwfn *p_hwfn, void *p_cookie) 835 { 836 struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie; 837 int rc; 838 839 if (!QED_LL2_RX_REGISTERED(p_ll2_conn)) 840 return 0; 841 842 rc = qed_ll2_lb_rxq_handler(p_hwfn, p_ll2_conn); 843 if (rc) 844 return rc; 845 846 qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn); 847 qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn); 848 849 return 0; 850 } 851 852 static int qed_ll2_lb_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie) 853 { 854 struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie; 855 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; 856 struct qed_ll2_tx_packet *p_pkt = NULL; 857 struct qed_ooo_buffer *p_buffer; 858 bool b_dont_submit_rx = false; 859 u16 new_idx = 0, num_bds = 0; 860 int rc; 861 862 if (!QED_LL2_TX_REGISTERED(p_ll2_conn)) 863 return 0; 864 865 new_idx = le16_to_cpu(*p_tx->p_fw_cons); 866 num_bds = ((s16)new_idx - (s16)p_tx->bds_idx); 867 868 if (!num_bds) 869 return 0; 870 871 while (num_bds) { 872 if (list_empty(&p_tx->active_descq)) 873 return -EINVAL; 874 875 p_pkt = list_first_entry(&p_tx->active_descq, 876 struct qed_ll2_tx_packet, list_entry); 877 if (!p_pkt) 878 return -EINVAL; 879 880 if (p_pkt->bd_used != 1) { 881 DP_NOTICE(p_hwfn, 882 "Unexpectedly many BDs(%d) in TX OOO completion\n", 883 p_pkt->bd_used); 884 return -EINVAL; 885 } 886 887 list_del(&p_pkt->list_entry); 888 889 num_bds--; 890 p_tx->bds_idx++; 891 qed_chain_consume(&p_tx->txq_chain); 892 893 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie; 894 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq); 895 896 if (b_dont_submit_rx) { 897 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, 898 p_buffer); 899 continue; 900 } 901 902 rc = qed_ll2_post_rx_buffer(p_hwfn, p_ll2_conn->my_id, 903 p_buffer->rx_buffer_phys_addr, 0, 904 p_buffer, true); 905 if (rc != 0) { 906 qed_ooo_put_free_buffer(p_hwfn, 907 p_hwfn->p_ooo_info, p_buffer); 908 b_dont_submit_rx = true; 909 } 910 } 911 912 qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn); 913 914 return 0; 915 } 916 917 static void qed_ll2_stop_ooo(struct qed_dev *cdev) 918 { 919 struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev); 920 u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id; 921 922 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Stopping LL2 OOO queue [%02x]\n", 923 *handle); 924 925 qed_ll2_terminate_connection(hwfn, *handle); 926 qed_ll2_release_connection(hwfn, *handle); 927 *handle = QED_LL2_UNUSED_HANDLE; 928 } 929 930 static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn, 931 struct qed_ll2_info *p_ll2_conn, 932 u8 action_on_error) 933 { 934 enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type; 935 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; 936 struct core_rx_start_ramrod_data *p_ramrod = NULL; 937 struct qed_spq_entry *p_ent = NULL; 938 struct qed_sp_init_data init_data; 939 u16 cqe_pbl_size; 940 int rc = 0; 941 942 /* Get SPQ entry */ 943 memset(&init_data, 0, sizeof(init_data)); 944 init_data.cid = p_ll2_conn->cid; 945 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; 946 init_data.comp_mode = QED_SPQ_MODE_EBLOCK; 947 948 rc = qed_sp_init_request(p_hwfn, &p_ent, 949 CORE_RAMROD_RX_QUEUE_START, 950 PROTOCOLID_CORE, &init_data); 951 if (rc) 952 return rc; 953 954 p_ramrod = &p_ent->ramrod.core_rx_queue_start; 955 956 p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn)); 957 p_ramrod->sb_index = p_rx->rx_sb_index; 958 p_ramrod->complete_event_flg = 1; 959 960 p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu); 961 DMA_REGPAIR_LE(p_ramrod->bd_base, p_rx->rxq_chain.p_phys_addr); 962 cqe_pbl_size = (u16)qed_chain_get_page_cnt(&p_rx->rcq_chain); 963 p_ramrod->num_of_pbl_pages = cpu_to_le16(cqe_pbl_size); 964 DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr, 965 qed_chain_get_pbl_phys(&p_rx->rcq_chain)); 966 967 p_ramrod->drop_ttl0_flg = p_ll2_conn->input.rx_drop_ttl0_flg; 968 p_ramrod->inner_vlan_stripping_en = 969 p_ll2_conn->input.rx_vlan_removal_en; 970 971 if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) && 972 p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) 973 p_ramrod->report_outer_vlan = 1; 974 p_ramrod->queue_id = p_ll2_conn->queue_id; 975 p_ramrod->main_func_queue = p_ll2_conn->main_func_queue ? 1 : 0; 976 977 if (test_bit(QED_MF_LL2_NON_UNICAST, &p_hwfn->cdev->mf_bits) && 978 p_ramrod->main_func_queue && conn_type != QED_LL2_TYPE_ROCE && 979 conn_type != QED_LL2_TYPE_IWARP) { 980 p_ramrod->mf_si_bcast_accept_all = 1; 981 p_ramrod->mf_si_mcast_accept_all = 1; 982 } else { 983 p_ramrod->mf_si_bcast_accept_all = 0; 984 p_ramrod->mf_si_mcast_accept_all = 0; 985 } 986 987 p_ramrod->action_on_error.error_type = action_on_error; 988 p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable; 989 return qed_spq_post(p_hwfn, p_ent, NULL); 990 } 991 992 static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn, 993 struct qed_ll2_info *p_ll2_conn) 994 { 995 enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type; 996 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; 997 struct core_tx_start_ramrod_data *p_ramrod = NULL; 998 struct qed_spq_entry *p_ent = NULL; 999 struct qed_sp_init_data init_data; 1000 u16 pq_id = 0, pbl_size; 1001 int rc = -EINVAL; 1002 1003 if (!QED_LL2_TX_REGISTERED(p_ll2_conn)) 1004 return 0; 1005 1006 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) 1007 p_ll2_conn->tx_stats_en = 0; 1008 else 1009 p_ll2_conn->tx_stats_en = 1; 1010 1011 /* Get SPQ entry */ 1012 memset(&init_data, 0, sizeof(init_data)); 1013 init_data.cid = p_ll2_conn->cid; 1014 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; 1015 init_data.comp_mode = QED_SPQ_MODE_EBLOCK; 1016 1017 rc = qed_sp_init_request(p_hwfn, &p_ent, 1018 CORE_RAMROD_TX_QUEUE_START, 1019 PROTOCOLID_CORE, &init_data); 1020 if (rc) 1021 return rc; 1022 1023 p_ramrod = &p_ent->ramrod.core_tx_queue_start; 1024 1025 p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn)); 1026 p_ramrod->sb_index = p_tx->tx_sb_index; 1027 p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu); 1028 p_ramrod->stats_en = p_ll2_conn->tx_stats_en; 1029 p_ramrod->stats_id = p_ll2_conn->tx_stats_id; 1030 1031 DMA_REGPAIR_LE(p_ramrod->pbl_base_addr, 1032 qed_chain_get_pbl_phys(&p_tx->txq_chain)); 1033 pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain); 1034 p_ramrod->pbl_size = cpu_to_le16(pbl_size); 1035 1036 switch (p_ll2_conn->input.tx_tc) { 1037 case PURE_LB_TC: 1038 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB); 1039 break; 1040 case PKT_LB_TC: 1041 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OOO); 1042 break; 1043 default: 1044 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD); 1045 break; 1046 } 1047 1048 p_ramrod->qm_pq_id = cpu_to_le16(pq_id); 1049 1050 switch (conn_type) { 1051 case QED_LL2_TYPE_FCOE: 1052 p_ramrod->conn_type = PROTOCOLID_FCOE; 1053 break; 1054 case QED_LL2_TYPE_ISCSI: 1055 p_ramrod->conn_type = PROTOCOLID_ISCSI; 1056 break; 1057 case QED_LL2_TYPE_ROCE: 1058 p_ramrod->conn_type = PROTOCOLID_ROCE; 1059 break; 1060 case QED_LL2_TYPE_IWARP: 1061 p_ramrod->conn_type = PROTOCOLID_IWARP; 1062 break; 1063 case QED_LL2_TYPE_OOO: 1064 if (p_hwfn->hw_info.personality == QED_PCI_ISCSI) 1065 p_ramrod->conn_type = PROTOCOLID_ISCSI; 1066 else 1067 p_ramrod->conn_type = PROTOCOLID_IWARP; 1068 break; 1069 default: 1070 p_ramrod->conn_type = PROTOCOLID_ETH; 1071 DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type); 1072 } 1073 1074 p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable; 1075 1076 return qed_spq_post(p_hwfn, p_ent, NULL); 1077 } 1078 1079 static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn, 1080 struct qed_ll2_info *p_ll2_conn) 1081 { 1082 struct core_rx_stop_ramrod_data *p_ramrod = NULL; 1083 struct qed_spq_entry *p_ent = NULL; 1084 struct qed_sp_init_data init_data; 1085 int rc = -EINVAL; 1086 1087 /* Get SPQ entry */ 1088 memset(&init_data, 0, sizeof(init_data)); 1089 init_data.cid = p_ll2_conn->cid; 1090 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; 1091 init_data.comp_mode = QED_SPQ_MODE_EBLOCK; 1092 1093 rc = qed_sp_init_request(p_hwfn, &p_ent, 1094 CORE_RAMROD_RX_QUEUE_STOP, 1095 PROTOCOLID_CORE, &init_data); 1096 if (rc) 1097 return rc; 1098 1099 p_ramrod = &p_ent->ramrod.core_rx_queue_stop; 1100 1101 p_ramrod->complete_event_flg = 1; 1102 p_ramrod->queue_id = p_ll2_conn->queue_id; 1103 1104 return qed_spq_post(p_hwfn, p_ent, NULL); 1105 } 1106 1107 static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn, 1108 struct qed_ll2_info *p_ll2_conn) 1109 { 1110 struct qed_spq_entry *p_ent = NULL; 1111 struct qed_sp_init_data init_data; 1112 int rc = -EINVAL; 1113 1114 /* Get SPQ entry */ 1115 memset(&init_data, 0, sizeof(init_data)); 1116 init_data.cid = p_ll2_conn->cid; 1117 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; 1118 init_data.comp_mode = QED_SPQ_MODE_EBLOCK; 1119 1120 rc = qed_sp_init_request(p_hwfn, &p_ent, 1121 CORE_RAMROD_TX_QUEUE_STOP, 1122 PROTOCOLID_CORE, &init_data); 1123 if (rc) 1124 return rc; 1125 1126 return qed_spq_post(p_hwfn, p_ent, NULL); 1127 } 1128 1129 static int 1130 qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn, 1131 struct qed_ll2_info *p_ll2_info) 1132 { 1133 struct qed_ll2_rx_packet *p_descq; 1134 u32 capacity; 1135 int rc = 0; 1136 1137 if (!p_ll2_info->input.rx_num_desc) 1138 goto out; 1139 1140 rc = qed_chain_alloc(p_hwfn->cdev, 1141 QED_CHAIN_USE_TO_CONSUME_PRODUCE, 1142 QED_CHAIN_MODE_NEXT_PTR, 1143 QED_CHAIN_CNT_TYPE_U16, 1144 p_ll2_info->input.rx_num_desc, 1145 sizeof(struct core_rx_bd), 1146 &p_ll2_info->rx_queue.rxq_chain, NULL); 1147 if (rc) { 1148 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n"); 1149 goto out; 1150 } 1151 1152 capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain); 1153 p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet), 1154 GFP_KERNEL); 1155 if (!p_descq) { 1156 rc = -ENOMEM; 1157 DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n"); 1158 goto out; 1159 } 1160 p_ll2_info->rx_queue.descq_array = p_descq; 1161 1162 rc = qed_chain_alloc(p_hwfn->cdev, 1163 QED_CHAIN_USE_TO_CONSUME_PRODUCE, 1164 QED_CHAIN_MODE_PBL, 1165 QED_CHAIN_CNT_TYPE_U16, 1166 p_ll2_info->input.rx_num_desc, 1167 sizeof(struct core_rx_fast_path_cqe), 1168 &p_ll2_info->rx_queue.rcq_chain, NULL); 1169 if (rc) { 1170 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n"); 1171 goto out; 1172 } 1173 1174 DP_VERBOSE(p_hwfn, QED_MSG_LL2, 1175 "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n", 1176 p_ll2_info->input.conn_type, p_ll2_info->input.rx_num_desc); 1177 1178 out: 1179 return rc; 1180 } 1181 1182 static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn, 1183 struct qed_ll2_info *p_ll2_info) 1184 { 1185 struct qed_ll2_tx_packet *p_descq; 1186 u32 desc_size; 1187 u32 capacity; 1188 int rc = 0; 1189 1190 if (!p_ll2_info->input.tx_num_desc) 1191 goto out; 1192 1193 rc = qed_chain_alloc(p_hwfn->cdev, 1194 QED_CHAIN_USE_TO_CONSUME_PRODUCE, 1195 QED_CHAIN_MODE_PBL, 1196 QED_CHAIN_CNT_TYPE_U16, 1197 p_ll2_info->input.tx_num_desc, 1198 sizeof(struct core_tx_bd), 1199 &p_ll2_info->tx_queue.txq_chain, NULL); 1200 if (rc) 1201 goto out; 1202 1203 capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain); 1204 /* First element is part of the packet, rest are flexibly added */ 1205 desc_size = (sizeof(*p_descq) + 1206 (p_ll2_info->input.tx_max_bds_per_packet - 1) * 1207 sizeof(p_descq->bds_set)); 1208 1209 p_descq = kcalloc(capacity, desc_size, GFP_KERNEL); 1210 if (!p_descq) { 1211 rc = -ENOMEM; 1212 goto out; 1213 } 1214 p_ll2_info->tx_queue.descq_mem = p_descq; 1215 1216 DP_VERBOSE(p_hwfn, QED_MSG_LL2, 1217 "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n", 1218 p_ll2_info->input.conn_type, p_ll2_info->input.tx_num_desc); 1219 1220 out: 1221 if (rc) 1222 DP_NOTICE(p_hwfn, 1223 "Can't allocate memory for Tx LL2 with 0x%08x buffers\n", 1224 p_ll2_info->input.tx_num_desc); 1225 return rc; 1226 } 1227 1228 static int 1229 qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn, 1230 struct qed_ll2_info *p_ll2_info, u16 mtu) 1231 { 1232 struct qed_ooo_buffer *p_buf = NULL; 1233 void *p_virt; 1234 u16 buf_idx; 1235 int rc = 0; 1236 1237 if (p_ll2_info->input.conn_type != QED_LL2_TYPE_OOO) 1238 return rc; 1239 1240 /* Correct number of requested OOO buffers if needed */ 1241 if (!p_ll2_info->input.rx_num_ooo_buffers) { 1242 u16 num_desc = p_ll2_info->input.rx_num_desc; 1243 1244 if (!num_desc) 1245 return -EINVAL; 1246 p_ll2_info->input.rx_num_ooo_buffers = num_desc * 2; 1247 } 1248 1249 for (buf_idx = 0; buf_idx < p_ll2_info->input.rx_num_ooo_buffers; 1250 buf_idx++) { 1251 p_buf = kzalloc(sizeof(*p_buf), GFP_KERNEL); 1252 if (!p_buf) { 1253 rc = -ENOMEM; 1254 goto out; 1255 } 1256 1257 p_buf->rx_buffer_size = mtu + 26 + ETH_CACHE_LINE_SIZE; 1258 p_buf->rx_buffer_size = (p_buf->rx_buffer_size + 1259 ETH_CACHE_LINE_SIZE - 1) & 1260 ~(ETH_CACHE_LINE_SIZE - 1); 1261 p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev, 1262 p_buf->rx_buffer_size, 1263 &p_buf->rx_buffer_phys_addr, 1264 GFP_KERNEL); 1265 if (!p_virt) { 1266 kfree(p_buf); 1267 rc = -ENOMEM; 1268 goto out; 1269 } 1270 1271 p_buf->rx_buffer_virt_addr = p_virt; 1272 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buf); 1273 } 1274 1275 DP_VERBOSE(p_hwfn, QED_MSG_LL2, 1276 "Allocated [%04x] LL2 OOO buffers [each of size 0x%08x]\n", 1277 p_ll2_info->input.rx_num_ooo_buffers, p_buf->rx_buffer_size); 1278 1279 out: 1280 return rc; 1281 } 1282 1283 static int 1284 qed_ll2_set_cbs(struct qed_ll2_info *p_ll2_info, const struct qed_ll2_cbs *cbs) 1285 { 1286 if (!cbs || (!cbs->rx_comp_cb || 1287 !cbs->rx_release_cb || 1288 !cbs->tx_comp_cb || !cbs->tx_release_cb || !cbs->cookie)) 1289 return -EINVAL; 1290 1291 p_ll2_info->cbs.rx_comp_cb = cbs->rx_comp_cb; 1292 p_ll2_info->cbs.rx_release_cb = cbs->rx_release_cb; 1293 p_ll2_info->cbs.tx_comp_cb = cbs->tx_comp_cb; 1294 p_ll2_info->cbs.tx_release_cb = cbs->tx_release_cb; 1295 p_ll2_info->cbs.slowpath_cb = cbs->slowpath_cb; 1296 p_ll2_info->cbs.cookie = cbs->cookie; 1297 1298 return 0; 1299 } 1300 1301 static enum core_error_handle 1302 qed_ll2_get_error_choice(enum qed_ll2_error_handle err) 1303 { 1304 switch (err) { 1305 case QED_LL2_DROP_PACKET: 1306 return LL2_DROP_PACKET; 1307 case QED_LL2_DO_NOTHING: 1308 return LL2_DO_NOTHING; 1309 case QED_LL2_ASSERT: 1310 return LL2_ASSERT; 1311 default: 1312 return LL2_DO_NOTHING; 1313 } 1314 } 1315 1316 int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data) 1317 { 1318 struct qed_hwfn *p_hwfn = cxt; 1319 qed_int_comp_cb_t comp_rx_cb, comp_tx_cb; 1320 struct qed_ll2_info *p_ll2_info = NULL; 1321 u8 i, *p_tx_max; 1322 int rc; 1323 1324 if (!data->p_connection_handle || !p_hwfn->p_ll2_info) 1325 return -EINVAL; 1326 1327 /* Find a free connection to be used */ 1328 for (i = 0; (i < QED_MAX_NUM_OF_LL2_CONNECTIONS); i++) { 1329 mutex_lock(&p_hwfn->p_ll2_info[i].mutex); 1330 if (p_hwfn->p_ll2_info[i].b_active) { 1331 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex); 1332 continue; 1333 } 1334 1335 p_hwfn->p_ll2_info[i].b_active = true; 1336 p_ll2_info = &p_hwfn->p_ll2_info[i]; 1337 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex); 1338 break; 1339 } 1340 if (!p_ll2_info) 1341 return -EBUSY; 1342 1343 memcpy(&p_ll2_info->input, &data->input, sizeof(p_ll2_info->input)); 1344 1345 switch (data->input.tx_dest) { 1346 case QED_LL2_TX_DEST_NW: 1347 p_ll2_info->tx_dest = CORE_TX_DEST_NW; 1348 break; 1349 case QED_LL2_TX_DEST_LB: 1350 p_ll2_info->tx_dest = CORE_TX_DEST_LB; 1351 break; 1352 case QED_LL2_TX_DEST_DROP: 1353 p_ll2_info->tx_dest = CORE_TX_DEST_DROP; 1354 break; 1355 default: 1356 return -EINVAL; 1357 } 1358 1359 if (data->input.conn_type == QED_LL2_TYPE_OOO || 1360 data->input.secondary_queue) 1361 p_ll2_info->main_func_queue = false; 1362 else 1363 p_ll2_info->main_func_queue = true; 1364 1365 /* Correct maximum number of Tx BDs */ 1366 p_tx_max = &p_ll2_info->input.tx_max_bds_per_packet; 1367 if (*p_tx_max == 0) 1368 *p_tx_max = CORE_LL2_TX_MAX_BDS_PER_PACKET; 1369 else 1370 *p_tx_max = min_t(u8, *p_tx_max, 1371 CORE_LL2_TX_MAX_BDS_PER_PACKET); 1372 1373 rc = qed_ll2_set_cbs(p_ll2_info, data->cbs); 1374 if (rc) { 1375 DP_NOTICE(p_hwfn, "Invalid callback functions\n"); 1376 goto q_allocate_fail; 1377 } 1378 1379 rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info); 1380 if (rc) 1381 goto q_allocate_fail; 1382 1383 rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info); 1384 if (rc) 1385 goto q_allocate_fail; 1386 1387 rc = qed_ll2_acquire_connection_ooo(p_hwfn, p_ll2_info, 1388 data->input.mtu); 1389 if (rc) 1390 goto q_allocate_fail; 1391 1392 /* Register callbacks for the Rx/Tx queues */ 1393 if (data->input.conn_type == QED_LL2_TYPE_OOO) { 1394 comp_rx_cb = qed_ll2_lb_rxq_completion; 1395 comp_tx_cb = qed_ll2_lb_txq_completion; 1396 } else { 1397 comp_rx_cb = qed_ll2_rxq_completion; 1398 comp_tx_cb = qed_ll2_txq_completion; 1399 } 1400 1401 if (data->input.rx_num_desc) { 1402 qed_int_register_cb(p_hwfn, comp_rx_cb, 1403 &p_hwfn->p_ll2_info[i], 1404 &p_ll2_info->rx_queue.rx_sb_index, 1405 &p_ll2_info->rx_queue.p_fw_cons); 1406 p_ll2_info->rx_queue.b_cb_registred = true; 1407 } 1408 1409 if (data->input.tx_num_desc) { 1410 qed_int_register_cb(p_hwfn, 1411 comp_tx_cb, 1412 &p_hwfn->p_ll2_info[i], 1413 &p_ll2_info->tx_queue.tx_sb_index, 1414 &p_ll2_info->tx_queue.p_fw_cons); 1415 p_ll2_info->tx_queue.b_cb_registred = true; 1416 } 1417 1418 *data->p_connection_handle = i; 1419 return rc; 1420 1421 q_allocate_fail: 1422 qed_ll2_release_connection(p_hwfn, i); 1423 return -ENOMEM; 1424 } 1425 1426 static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn, 1427 struct qed_ll2_info *p_ll2_conn) 1428 { 1429 enum qed_ll2_error_handle error_input; 1430 enum core_error_handle error_mode; 1431 u8 action_on_error = 0; 1432 1433 if (!QED_LL2_RX_REGISTERED(p_ll2_conn)) 1434 return 0; 1435 1436 DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0); 1437 error_input = p_ll2_conn->input.ai_err_packet_too_big; 1438 error_mode = qed_ll2_get_error_choice(error_input); 1439 SET_FIELD(action_on_error, 1440 CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, error_mode); 1441 error_input = p_ll2_conn->input.ai_err_no_buf; 1442 error_mode = qed_ll2_get_error_choice(error_input); 1443 SET_FIELD(action_on_error, CORE_RX_ACTION_ON_ERROR_NO_BUFF, error_mode); 1444 1445 return qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error); 1446 } 1447 1448 static void 1449 qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn, 1450 struct qed_ll2_info *p_ll2_conn) 1451 { 1452 if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO) 1453 return; 1454 1455 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info); 1456 qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn); 1457 } 1458 1459 int qed_ll2_establish_connection(void *cxt, u8 connection_handle) 1460 { 1461 struct qed_hwfn *p_hwfn = cxt; 1462 struct qed_ll2_info *p_ll2_conn; 1463 struct qed_ll2_tx_packet *p_pkt; 1464 struct qed_ll2_rx_queue *p_rx; 1465 struct qed_ll2_tx_queue *p_tx; 1466 struct qed_ptt *p_ptt; 1467 int rc = -EINVAL; 1468 u32 i, capacity; 1469 u32 desc_size; 1470 u8 qid; 1471 1472 p_ptt = qed_ptt_acquire(p_hwfn); 1473 if (!p_ptt) 1474 return -EAGAIN; 1475 1476 p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle); 1477 if (!p_ll2_conn) { 1478 rc = -EINVAL; 1479 goto out; 1480 } 1481 1482 p_rx = &p_ll2_conn->rx_queue; 1483 p_tx = &p_ll2_conn->tx_queue; 1484 1485 qed_chain_reset(&p_rx->rxq_chain); 1486 qed_chain_reset(&p_rx->rcq_chain); 1487 INIT_LIST_HEAD(&p_rx->active_descq); 1488 INIT_LIST_HEAD(&p_rx->free_descq); 1489 INIT_LIST_HEAD(&p_rx->posting_descq); 1490 spin_lock_init(&p_rx->lock); 1491 capacity = qed_chain_get_capacity(&p_rx->rxq_chain); 1492 for (i = 0; i < capacity; i++) 1493 list_add_tail(&p_rx->descq_array[i].list_entry, 1494 &p_rx->free_descq); 1495 *p_rx->p_fw_cons = 0; 1496 1497 qed_chain_reset(&p_tx->txq_chain); 1498 INIT_LIST_HEAD(&p_tx->active_descq); 1499 INIT_LIST_HEAD(&p_tx->free_descq); 1500 INIT_LIST_HEAD(&p_tx->sending_descq); 1501 spin_lock_init(&p_tx->lock); 1502 capacity = qed_chain_get_capacity(&p_tx->txq_chain); 1503 /* First element is part of the packet, rest are flexibly added */ 1504 desc_size = (sizeof(*p_pkt) + 1505 (p_ll2_conn->input.tx_max_bds_per_packet - 1) * 1506 sizeof(p_pkt->bds_set)); 1507 1508 for (i = 0; i < capacity; i++) { 1509 p_pkt = p_tx->descq_mem + desc_size * i; 1510 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq); 1511 } 1512 p_tx->cur_completing_bd_idx = 0; 1513 p_tx->bds_idx = 0; 1514 p_tx->b_completing_packet = false; 1515 p_tx->cur_send_packet = NULL; 1516 p_tx->cur_send_frag_num = 0; 1517 p_tx->cur_completing_frag_num = 0; 1518 *p_tx->p_fw_cons = 0; 1519 1520 rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid); 1521 if (rc) 1522 goto out; 1523 1524 qid = p_hwfn->hw_info.resc_start[QED_LL2_QUEUE] + connection_handle; 1525 p_ll2_conn->queue_id = qid; 1526 p_ll2_conn->tx_stats_id = qid; 1527 p_rx->set_prod_addr = (u8 __iomem *)p_hwfn->regview + 1528 GTT_BAR0_MAP_REG_TSDM_RAM + 1529 TSTORM_LL2_RX_PRODS_OFFSET(qid); 1530 p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells + 1531 qed_db_addr(p_ll2_conn->cid, 1532 DQ_DEMS_LEGACY); 1533 1534 rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn); 1535 if (rc) 1536 goto out; 1537 1538 rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn); 1539 if (rc) 1540 goto out; 1541 1542 if (!QED_IS_RDMA_PERSONALITY(p_hwfn)) 1543 qed_wr(p_hwfn, p_ptt, PRS_REG_USE_LIGHT_L2, 1); 1544 1545 qed_ll2_establish_connection_ooo(p_hwfn, p_ll2_conn); 1546 1547 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) { 1548 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits)) 1549 qed_llh_add_protocol_filter(p_hwfn, p_ptt, 1550 ETH_P_FCOE, 0, 1551 QED_LLH_FILTER_ETHERTYPE); 1552 qed_llh_add_protocol_filter(p_hwfn, p_ptt, 1553 ETH_P_FIP, 0, 1554 QED_LLH_FILTER_ETHERTYPE); 1555 } 1556 1557 out: 1558 qed_ptt_release(p_hwfn, p_ptt); 1559 return rc; 1560 } 1561 1562 static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn, 1563 struct qed_ll2_rx_queue *p_rx, 1564 struct qed_ll2_rx_packet *p_curp) 1565 { 1566 struct qed_ll2_rx_packet *p_posting_packet = NULL; 1567 struct core_ll2_rx_prod rx_prod = { 0, 0, 0 }; 1568 bool b_notify_fw = false; 1569 u16 bd_prod, cq_prod; 1570 1571 /* This handles the flushing of already posted buffers */ 1572 while (!list_empty(&p_rx->posting_descq)) { 1573 p_posting_packet = list_first_entry(&p_rx->posting_descq, 1574 struct qed_ll2_rx_packet, 1575 list_entry); 1576 list_move_tail(&p_posting_packet->list_entry, 1577 &p_rx->active_descq); 1578 b_notify_fw = true; 1579 } 1580 1581 /* This handles the supplied packet [if there is one] */ 1582 if (p_curp) { 1583 list_add_tail(&p_curp->list_entry, &p_rx->active_descq); 1584 b_notify_fw = true; 1585 } 1586 1587 if (!b_notify_fw) 1588 return; 1589 1590 bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain); 1591 cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain); 1592 rx_prod.bd_prod = cpu_to_le16(bd_prod); 1593 rx_prod.cqe_prod = cpu_to_le16(cq_prod); 1594 DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod)); 1595 } 1596 1597 int qed_ll2_post_rx_buffer(void *cxt, 1598 u8 connection_handle, 1599 dma_addr_t addr, 1600 u16 buf_len, void *cookie, u8 notify_fw) 1601 { 1602 struct qed_hwfn *p_hwfn = cxt; 1603 struct core_rx_bd_with_buff_len *p_curb = NULL; 1604 struct qed_ll2_rx_packet *p_curp = NULL; 1605 struct qed_ll2_info *p_ll2_conn; 1606 struct qed_ll2_rx_queue *p_rx; 1607 unsigned long flags; 1608 void *p_data; 1609 int rc = 0; 1610 1611 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); 1612 if (!p_ll2_conn) 1613 return -EINVAL; 1614 p_rx = &p_ll2_conn->rx_queue; 1615 1616 spin_lock_irqsave(&p_rx->lock, flags); 1617 if (!list_empty(&p_rx->free_descq)) 1618 p_curp = list_first_entry(&p_rx->free_descq, 1619 struct qed_ll2_rx_packet, list_entry); 1620 if (p_curp) { 1621 if (qed_chain_get_elem_left(&p_rx->rxq_chain) && 1622 qed_chain_get_elem_left(&p_rx->rcq_chain)) { 1623 p_data = qed_chain_produce(&p_rx->rxq_chain); 1624 p_curb = (struct core_rx_bd_with_buff_len *)p_data; 1625 qed_chain_produce(&p_rx->rcq_chain); 1626 } 1627 } 1628 1629 /* If we're lacking entires, let's try to flush buffers to FW */ 1630 if (!p_curp || !p_curb) { 1631 rc = -EBUSY; 1632 p_curp = NULL; 1633 goto out_notify; 1634 } 1635 1636 /* We have an Rx packet we can fill */ 1637 DMA_REGPAIR_LE(p_curb->addr, addr); 1638 p_curb->buff_length = cpu_to_le16(buf_len); 1639 p_curp->rx_buf_addr = addr; 1640 p_curp->cookie = cookie; 1641 p_curp->rxq_bd = p_curb; 1642 p_curp->buf_length = buf_len; 1643 list_del(&p_curp->list_entry); 1644 1645 /* Check if we only want to enqueue this packet without informing FW */ 1646 if (!notify_fw) { 1647 list_add_tail(&p_curp->list_entry, &p_rx->posting_descq); 1648 goto out; 1649 } 1650 1651 out_notify: 1652 qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp); 1653 out: 1654 spin_unlock_irqrestore(&p_rx->lock, flags); 1655 return rc; 1656 } 1657 1658 static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn, 1659 struct qed_ll2_tx_queue *p_tx, 1660 struct qed_ll2_tx_packet *p_curp, 1661 struct qed_ll2_tx_pkt_info *pkt, 1662 u8 notify_fw) 1663 { 1664 list_del(&p_curp->list_entry); 1665 p_curp->cookie = pkt->cookie; 1666 p_curp->bd_used = pkt->num_of_bds; 1667 p_curp->notify_fw = notify_fw; 1668 p_tx->cur_send_packet = p_curp; 1669 p_tx->cur_send_frag_num = 0; 1670 1671 p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = pkt->first_frag; 1672 p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = pkt->first_frag_len; 1673 p_tx->cur_send_frag_num++; 1674 } 1675 1676 static void 1677 qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn, 1678 struct qed_ll2_info *p_ll2, 1679 struct qed_ll2_tx_packet *p_curp, 1680 struct qed_ll2_tx_pkt_info *pkt) 1681 { 1682 struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain; 1683 u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain); 1684 struct core_tx_bd *start_bd = NULL; 1685 enum core_roce_flavor_type roce_flavor; 1686 enum core_tx_dest tx_dest; 1687 u16 bd_data = 0, frag_idx; 1688 1689 roce_flavor = (pkt->qed_roce_flavor == QED_LL2_ROCE) ? CORE_ROCE 1690 : CORE_RROCE; 1691 1692 switch (pkt->tx_dest) { 1693 case QED_LL2_TX_DEST_NW: 1694 tx_dest = CORE_TX_DEST_NW; 1695 break; 1696 case QED_LL2_TX_DEST_LB: 1697 tx_dest = CORE_TX_DEST_LB; 1698 break; 1699 case QED_LL2_TX_DEST_DROP: 1700 tx_dest = CORE_TX_DEST_DROP; 1701 break; 1702 default: 1703 tx_dest = CORE_TX_DEST_LB; 1704 break; 1705 } 1706 1707 start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain); 1708 if (QED_IS_IWARP_PERSONALITY(p_hwfn) && 1709 p_ll2->input.conn_type == QED_LL2_TYPE_OOO) { 1710 start_bd->nw_vlan_or_lb_echo = 1711 cpu_to_le16(IWARP_LL2_IN_ORDER_TX_QUEUE); 1712 } else { 1713 start_bd->nw_vlan_or_lb_echo = cpu_to_le16(pkt->vlan); 1714 if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) && 1715 p_ll2->input.conn_type == QED_LL2_TYPE_FCOE) 1716 pkt->remove_stag = true; 1717 } 1718 1719 SET_FIELD(start_bd->bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W, 1720 cpu_to_le16(pkt->l4_hdr_offset_w)); 1721 SET_FIELD(start_bd->bitfield1, CORE_TX_BD_TX_DST, tx_dest); 1722 bd_data |= pkt->bd_flags; 1723 SET_FIELD(bd_data, CORE_TX_BD_DATA_START_BD, 0x1); 1724 SET_FIELD(bd_data, CORE_TX_BD_DATA_NBDS, pkt->num_of_bds); 1725 SET_FIELD(bd_data, CORE_TX_BD_DATA_ROCE_FLAV, roce_flavor); 1726 SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_CSUM, !!(pkt->enable_ip_cksum)); 1727 SET_FIELD(bd_data, CORE_TX_BD_DATA_L4_CSUM, !!(pkt->enable_l4_cksum)); 1728 SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_LEN, !!(pkt->calc_ip_len)); 1729 SET_FIELD(bd_data, CORE_TX_BD_DATA_DISABLE_STAG_INSERTION, 1730 !!(pkt->remove_stag)); 1731 1732 start_bd->bd_data.as_bitfield = cpu_to_le16(bd_data); 1733 DMA_REGPAIR_LE(start_bd->addr, pkt->first_frag); 1734 start_bd->nbytes = cpu_to_le16(pkt->first_frag_len); 1735 1736 DP_VERBOSE(p_hwfn, 1737 (NETIF_MSG_TX_QUEUED | QED_MSG_LL2), 1738 "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", 1739 p_ll2->queue_id, 1740 p_ll2->cid, 1741 p_ll2->input.conn_type, 1742 prod_idx, 1743 pkt->first_frag_len, 1744 pkt->num_of_bds, 1745 le32_to_cpu(start_bd->addr.hi), 1746 le32_to_cpu(start_bd->addr.lo)); 1747 1748 if (p_ll2->tx_queue.cur_send_frag_num == pkt->num_of_bds) 1749 return; 1750 1751 /* Need to provide the packet with additional BDs for frags */ 1752 for (frag_idx = p_ll2->tx_queue.cur_send_frag_num; 1753 frag_idx < pkt->num_of_bds; frag_idx++) { 1754 struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd; 1755 1756 *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain); 1757 (*p_bd)->bd_data.as_bitfield = 0; 1758 (*p_bd)->bitfield1 = 0; 1759 p_curp->bds_set[frag_idx].tx_frag = 0; 1760 p_curp->bds_set[frag_idx].frag_len = 0; 1761 } 1762 } 1763 1764 /* This should be called while the Txq spinlock is being held */ 1765 static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn, 1766 struct qed_ll2_info *p_ll2_conn) 1767 { 1768 bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw; 1769 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; 1770 struct qed_ll2_tx_packet *p_pkt = NULL; 1771 struct core_db_data db_msg = { 0, 0, 0 }; 1772 u16 bd_prod; 1773 1774 /* If there are missing BDs, don't do anything now */ 1775 if (p_ll2_conn->tx_queue.cur_send_frag_num != 1776 p_ll2_conn->tx_queue.cur_send_packet->bd_used) 1777 return; 1778 1779 /* Push the current packet to the list and clean after it */ 1780 list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry, 1781 &p_ll2_conn->tx_queue.sending_descq); 1782 p_ll2_conn->tx_queue.cur_send_packet = NULL; 1783 p_ll2_conn->tx_queue.cur_send_frag_num = 0; 1784 1785 /* Notify FW of packet only if requested to */ 1786 if (!b_notify) 1787 return; 1788 1789 bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain); 1790 1791 while (!list_empty(&p_tx->sending_descq)) { 1792 p_pkt = list_first_entry(&p_tx->sending_descq, 1793 struct qed_ll2_tx_packet, list_entry); 1794 if (!p_pkt) 1795 break; 1796 1797 list_move_tail(&p_pkt->list_entry, &p_tx->active_descq); 1798 } 1799 1800 SET_FIELD(db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM); 1801 SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET); 1802 SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_VAL_SEL, 1803 DQ_XCM_CORE_TX_BD_PROD_CMD); 1804 db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD; 1805 db_msg.spq_prod = cpu_to_le16(bd_prod); 1806 1807 /* Make sure the BDs data is updated before ringing the doorbell */ 1808 wmb(); 1809 1810 DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&db_msg)); 1811 1812 DP_VERBOSE(p_hwfn, 1813 (NETIF_MSG_TX_QUEUED | QED_MSG_LL2), 1814 "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n", 1815 p_ll2_conn->queue_id, 1816 p_ll2_conn->cid, 1817 p_ll2_conn->input.conn_type, db_msg.spq_prod); 1818 } 1819 1820 int qed_ll2_prepare_tx_packet(void *cxt, 1821 u8 connection_handle, 1822 struct qed_ll2_tx_pkt_info *pkt, 1823 bool notify_fw) 1824 { 1825 struct qed_hwfn *p_hwfn = cxt; 1826 struct qed_ll2_tx_packet *p_curp = NULL; 1827 struct qed_ll2_info *p_ll2_conn = NULL; 1828 struct qed_ll2_tx_queue *p_tx; 1829 struct qed_chain *p_tx_chain; 1830 unsigned long flags; 1831 int rc = 0; 1832 1833 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); 1834 if (!p_ll2_conn) 1835 return -EINVAL; 1836 p_tx = &p_ll2_conn->tx_queue; 1837 p_tx_chain = &p_tx->txq_chain; 1838 1839 if (pkt->num_of_bds > p_ll2_conn->input.tx_max_bds_per_packet) 1840 return -EIO; 1841 1842 spin_lock_irqsave(&p_tx->lock, flags); 1843 if (p_tx->cur_send_packet) { 1844 rc = -EEXIST; 1845 goto out; 1846 } 1847 1848 /* Get entry, but only if we have tx elements for it */ 1849 if (!list_empty(&p_tx->free_descq)) 1850 p_curp = list_first_entry(&p_tx->free_descq, 1851 struct qed_ll2_tx_packet, list_entry); 1852 if (p_curp && qed_chain_get_elem_left(p_tx_chain) < pkt->num_of_bds) 1853 p_curp = NULL; 1854 1855 if (!p_curp) { 1856 rc = -EBUSY; 1857 goto out; 1858 } 1859 1860 /* Prepare packet and BD, and perhaps send a doorbell to FW */ 1861 qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp, pkt, notify_fw); 1862 1863 qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp, pkt); 1864 1865 qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn); 1866 1867 out: 1868 spin_unlock_irqrestore(&p_tx->lock, flags); 1869 return rc; 1870 } 1871 1872 int qed_ll2_set_fragment_of_tx_packet(void *cxt, 1873 u8 connection_handle, 1874 dma_addr_t addr, u16 nbytes) 1875 { 1876 struct qed_ll2_tx_packet *p_cur_send_packet = NULL; 1877 struct qed_hwfn *p_hwfn = cxt; 1878 struct qed_ll2_info *p_ll2_conn = NULL; 1879 u16 cur_send_frag_num = 0; 1880 struct core_tx_bd *p_bd; 1881 unsigned long flags; 1882 1883 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); 1884 if (!p_ll2_conn) 1885 return -EINVAL; 1886 1887 if (!p_ll2_conn->tx_queue.cur_send_packet) 1888 return -EINVAL; 1889 1890 p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet; 1891 cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num; 1892 1893 if (cur_send_frag_num >= p_cur_send_packet->bd_used) 1894 return -EINVAL; 1895 1896 /* Fill the BD information, and possibly notify FW */ 1897 p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd; 1898 DMA_REGPAIR_LE(p_bd->addr, addr); 1899 p_bd->nbytes = cpu_to_le16(nbytes); 1900 p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr; 1901 p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes; 1902 1903 p_ll2_conn->tx_queue.cur_send_frag_num++; 1904 1905 spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags); 1906 qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn); 1907 spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags); 1908 1909 return 0; 1910 } 1911 1912 int qed_ll2_terminate_connection(void *cxt, u8 connection_handle) 1913 { 1914 struct qed_hwfn *p_hwfn = cxt; 1915 struct qed_ll2_info *p_ll2_conn = NULL; 1916 int rc = -EINVAL; 1917 struct qed_ptt *p_ptt; 1918 1919 p_ptt = qed_ptt_acquire(p_hwfn); 1920 if (!p_ptt) 1921 return -EAGAIN; 1922 1923 p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle); 1924 if (!p_ll2_conn) { 1925 rc = -EINVAL; 1926 goto out; 1927 } 1928 1929 /* Stop Tx & Rx of connection, if needed */ 1930 if (QED_LL2_TX_REGISTERED(p_ll2_conn)) { 1931 p_ll2_conn->tx_queue.b_cb_registred = false; 1932 smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */ 1933 rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn); 1934 if (rc) 1935 goto out; 1936 1937 qed_ll2_txq_flush(p_hwfn, connection_handle); 1938 qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index); 1939 } 1940 1941 if (QED_LL2_RX_REGISTERED(p_ll2_conn)) { 1942 p_ll2_conn->rx_queue.b_cb_registred = false; 1943 smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */ 1944 rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn); 1945 if (rc) 1946 goto out; 1947 1948 qed_ll2_rxq_flush(p_hwfn, connection_handle); 1949 qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index); 1950 } 1951 1952 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) 1953 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info); 1954 1955 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) { 1956 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits)) 1957 qed_llh_remove_protocol_filter(p_hwfn, p_ptt, 1958 ETH_P_FCOE, 0, 1959 QED_LLH_FILTER_ETHERTYPE); 1960 qed_llh_remove_protocol_filter(p_hwfn, p_ptt, 1961 ETH_P_FIP, 0, 1962 QED_LLH_FILTER_ETHERTYPE); 1963 } 1964 1965 out: 1966 qed_ptt_release(p_hwfn, p_ptt); 1967 return rc; 1968 } 1969 1970 static void qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn, 1971 struct qed_ll2_info *p_ll2_conn) 1972 { 1973 struct qed_ooo_buffer *p_buffer; 1974 1975 if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO) 1976 return; 1977 1978 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info); 1979 while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn, 1980 p_hwfn->p_ooo_info))) { 1981 dma_free_coherent(&p_hwfn->cdev->pdev->dev, 1982 p_buffer->rx_buffer_size, 1983 p_buffer->rx_buffer_virt_addr, 1984 p_buffer->rx_buffer_phys_addr); 1985 kfree(p_buffer); 1986 } 1987 } 1988 1989 void qed_ll2_release_connection(void *cxt, u8 connection_handle) 1990 { 1991 struct qed_hwfn *p_hwfn = cxt; 1992 struct qed_ll2_info *p_ll2_conn = NULL; 1993 1994 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); 1995 if (!p_ll2_conn) 1996 return; 1997 1998 kfree(p_ll2_conn->tx_queue.descq_mem); 1999 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain); 2000 2001 kfree(p_ll2_conn->rx_queue.descq_array); 2002 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain); 2003 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain); 2004 2005 qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid); 2006 2007 qed_ll2_release_connection_ooo(p_hwfn, p_ll2_conn); 2008 2009 mutex_lock(&p_ll2_conn->mutex); 2010 p_ll2_conn->b_active = false; 2011 mutex_unlock(&p_ll2_conn->mutex); 2012 } 2013 2014 int qed_ll2_alloc(struct qed_hwfn *p_hwfn) 2015 { 2016 struct qed_ll2_info *p_ll2_connections; 2017 u8 i; 2018 2019 /* Allocate LL2's set struct */ 2020 p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS, 2021 sizeof(struct qed_ll2_info), GFP_KERNEL); 2022 if (!p_ll2_connections) { 2023 DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n"); 2024 return -ENOMEM; 2025 } 2026 2027 for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++) 2028 p_ll2_connections[i].my_id = i; 2029 2030 p_hwfn->p_ll2_info = p_ll2_connections; 2031 return 0; 2032 } 2033 2034 void qed_ll2_setup(struct qed_hwfn *p_hwfn) 2035 { 2036 int i; 2037 2038 for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++) 2039 mutex_init(&p_hwfn->p_ll2_info[i].mutex); 2040 } 2041 2042 void qed_ll2_free(struct qed_hwfn *p_hwfn) 2043 { 2044 if (!p_hwfn->p_ll2_info) 2045 return; 2046 2047 kfree(p_hwfn->p_ll2_info); 2048 p_hwfn->p_ll2_info = NULL; 2049 } 2050 2051 static void _qed_ll2_get_port_stats(struct qed_hwfn *p_hwfn, 2052 struct qed_ptt *p_ptt, 2053 struct qed_ll2_stats *p_stats) 2054 { 2055 struct core_ll2_port_stats port_stats; 2056 2057 memset(&port_stats, 0, sizeof(port_stats)); 2058 qed_memcpy_from(p_hwfn, p_ptt, &port_stats, 2059 BAR0_MAP_REG_TSDM_RAM + 2060 TSTORM_LL2_PORT_STAT_OFFSET(MFW_PORT(p_hwfn)), 2061 sizeof(port_stats)); 2062 2063 p_stats->gsi_invalid_hdr = HILO_64_REGPAIR(port_stats.gsi_invalid_hdr); 2064 p_stats->gsi_invalid_pkt_length = 2065 HILO_64_REGPAIR(port_stats.gsi_invalid_pkt_length); 2066 p_stats->gsi_unsupported_pkt_typ = 2067 HILO_64_REGPAIR(port_stats.gsi_unsupported_pkt_typ); 2068 p_stats->gsi_crcchksm_error = 2069 HILO_64_REGPAIR(port_stats.gsi_crcchksm_error); 2070 } 2071 2072 static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn, 2073 struct qed_ptt *p_ptt, 2074 struct qed_ll2_info *p_ll2_conn, 2075 struct qed_ll2_stats *p_stats) 2076 { 2077 struct core_ll2_tstorm_per_queue_stat tstats; 2078 u8 qid = p_ll2_conn->queue_id; 2079 u32 tstats_addr; 2080 2081 memset(&tstats, 0, sizeof(tstats)); 2082 tstats_addr = BAR0_MAP_REG_TSDM_RAM + 2083 CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid); 2084 qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats)); 2085 2086 p_stats->packet_too_big_discard = 2087 HILO_64_REGPAIR(tstats.packet_too_big_discard); 2088 p_stats->no_buff_discard = HILO_64_REGPAIR(tstats.no_buff_discard); 2089 } 2090 2091 static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn, 2092 struct qed_ptt *p_ptt, 2093 struct qed_ll2_info *p_ll2_conn, 2094 struct qed_ll2_stats *p_stats) 2095 { 2096 struct core_ll2_ustorm_per_queue_stat ustats; 2097 u8 qid = p_ll2_conn->queue_id; 2098 u32 ustats_addr; 2099 2100 memset(&ustats, 0, sizeof(ustats)); 2101 ustats_addr = BAR0_MAP_REG_USDM_RAM + 2102 CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid); 2103 qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats)); 2104 2105 p_stats->rcv_ucast_bytes = HILO_64_REGPAIR(ustats.rcv_ucast_bytes); 2106 p_stats->rcv_mcast_bytes = HILO_64_REGPAIR(ustats.rcv_mcast_bytes); 2107 p_stats->rcv_bcast_bytes = HILO_64_REGPAIR(ustats.rcv_bcast_bytes); 2108 p_stats->rcv_ucast_pkts = HILO_64_REGPAIR(ustats.rcv_ucast_pkts); 2109 p_stats->rcv_mcast_pkts = HILO_64_REGPAIR(ustats.rcv_mcast_pkts); 2110 p_stats->rcv_bcast_pkts = HILO_64_REGPAIR(ustats.rcv_bcast_pkts); 2111 } 2112 2113 static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn, 2114 struct qed_ptt *p_ptt, 2115 struct qed_ll2_info *p_ll2_conn, 2116 struct qed_ll2_stats *p_stats) 2117 { 2118 struct core_ll2_pstorm_per_queue_stat pstats; 2119 u8 stats_id = p_ll2_conn->tx_stats_id; 2120 u32 pstats_addr; 2121 2122 memset(&pstats, 0, sizeof(pstats)); 2123 pstats_addr = BAR0_MAP_REG_PSDM_RAM + 2124 CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id); 2125 qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats)); 2126 2127 p_stats->sent_ucast_bytes = HILO_64_REGPAIR(pstats.sent_ucast_bytes); 2128 p_stats->sent_mcast_bytes = HILO_64_REGPAIR(pstats.sent_mcast_bytes); 2129 p_stats->sent_bcast_bytes = HILO_64_REGPAIR(pstats.sent_bcast_bytes); 2130 p_stats->sent_ucast_pkts = HILO_64_REGPAIR(pstats.sent_ucast_pkts); 2131 p_stats->sent_mcast_pkts = HILO_64_REGPAIR(pstats.sent_mcast_pkts); 2132 p_stats->sent_bcast_pkts = HILO_64_REGPAIR(pstats.sent_bcast_pkts); 2133 } 2134 2135 int qed_ll2_get_stats(void *cxt, 2136 u8 connection_handle, struct qed_ll2_stats *p_stats) 2137 { 2138 struct qed_hwfn *p_hwfn = cxt; 2139 struct qed_ll2_info *p_ll2_conn = NULL; 2140 struct qed_ptt *p_ptt; 2141 2142 memset(p_stats, 0, sizeof(*p_stats)); 2143 2144 if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) || 2145 !p_hwfn->p_ll2_info) 2146 return -EINVAL; 2147 2148 p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle]; 2149 2150 p_ptt = qed_ptt_acquire(p_hwfn); 2151 if (!p_ptt) { 2152 DP_ERR(p_hwfn, "Failed to acquire ptt\n"); 2153 return -EINVAL; 2154 } 2155 2156 if (p_ll2_conn->input.gsi_enable) 2157 _qed_ll2_get_port_stats(p_hwfn, p_ptt, p_stats); 2158 _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats); 2159 _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats); 2160 if (p_ll2_conn->tx_stats_en) 2161 _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats); 2162 2163 qed_ptt_release(p_hwfn, p_ptt); 2164 return 0; 2165 } 2166 2167 static void qed_ll2b_release_rx_packet(void *cxt, 2168 u8 connection_handle, 2169 void *cookie, 2170 dma_addr_t rx_buf_addr, 2171 bool b_last_packet) 2172 { 2173 struct qed_hwfn *p_hwfn = cxt; 2174 2175 qed_ll2_dealloc_buffer(p_hwfn->cdev, cookie); 2176 } 2177 2178 static void qed_ll2_register_cb_ops(struct qed_dev *cdev, 2179 const struct qed_ll2_cb_ops *ops, 2180 void *cookie) 2181 { 2182 cdev->ll2->cbs = ops; 2183 cdev->ll2->cb_cookie = cookie; 2184 } 2185 2186 struct qed_ll2_cbs ll2_cbs = { 2187 .rx_comp_cb = &qed_ll2b_complete_rx_packet, 2188 .rx_release_cb = &qed_ll2b_release_rx_packet, 2189 .tx_comp_cb = &qed_ll2b_complete_tx_packet, 2190 .tx_release_cb = &qed_ll2b_complete_tx_packet, 2191 }; 2192 2193 static void qed_ll2_set_conn_data(struct qed_dev *cdev, 2194 struct qed_ll2_acquire_data *data, 2195 struct qed_ll2_params *params, 2196 enum qed_ll2_conn_type conn_type, 2197 u8 *handle, bool lb) 2198 { 2199 memset(data, 0, sizeof(*data)); 2200 2201 data->input.conn_type = conn_type; 2202 data->input.mtu = params->mtu; 2203 data->input.rx_num_desc = QED_LL2_RX_SIZE; 2204 data->input.rx_drop_ttl0_flg = params->drop_ttl0_packets; 2205 data->input.rx_vlan_removal_en = params->rx_vlan_stripping; 2206 data->input.tx_num_desc = QED_LL2_TX_SIZE; 2207 data->p_connection_handle = handle; 2208 data->cbs = &ll2_cbs; 2209 ll2_cbs.cookie = QED_LEADING_HWFN(cdev); 2210 2211 if (lb) { 2212 data->input.tx_tc = PKT_LB_TC; 2213 data->input.tx_dest = QED_LL2_TX_DEST_LB; 2214 } else { 2215 data->input.tx_tc = 0; 2216 data->input.tx_dest = QED_LL2_TX_DEST_NW; 2217 } 2218 } 2219 2220 static int qed_ll2_start_ooo(struct qed_dev *cdev, 2221 struct qed_ll2_params *params) 2222 { 2223 struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev); 2224 u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id; 2225 struct qed_ll2_acquire_data data; 2226 int rc; 2227 2228 qed_ll2_set_conn_data(cdev, &data, params, 2229 QED_LL2_TYPE_OOO, handle, true); 2230 2231 rc = qed_ll2_acquire_connection(hwfn, &data); 2232 if (rc) { 2233 DP_INFO(cdev, "Failed to acquire LL2 OOO connection\n"); 2234 goto out; 2235 } 2236 2237 rc = qed_ll2_establish_connection(hwfn, *handle); 2238 if (rc) { 2239 DP_INFO(cdev, "Failed to establist LL2 OOO connection\n"); 2240 goto fail; 2241 } 2242 2243 return 0; 2244 2245 fail: 2246 qed_ll2_release_connection(hwfn, *handle); 2247 out: 2248 *handle = QED_LL2_UNUSED_HANDLE; 2249 return rc; 2250 } 2251 2252 static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params) 2253 { 2254 struct qed_ll2_buffer *buffer, *tmp_buffer; 2255 enum qed_ll2_conn_type conn_type; 2256 struct qed_ll2_acquire_data data; 2257 struct qed_ptt *p_ptt; 2258 int rc, i; 2259 2260 2261 /* Initialize LL2 locks & lists */ 2262 INIT_LIST_HEAD(&cdev->ll2->list); 2263 spin_lock_init(&cdev->ll2->lock); 2264 cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN + 2265 L1_CACHE_BYTES + params->mtu; 2266 2267 /*Allocate memory for LL2 */ 2268 DP_INFO(cdev, "Allocating LL2 buffers of size %08x bytes\n", 2269 cdev->ll2->rx_size); 2270 for (i = 0; i < QED_LL2_RX_SIZE; i++) { 2271 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL); 2272 if (!buffer) { 2273 DP_INFO(cdev, "Failed to allocate LL2 buffers\n"); 2274 goto fail; 2275 } 2276 2277 rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data, 2278 &buffer->phys_addr); 2279 if (rc) { 2280 kfree(buffer); 2281 goto fail; 2282 } 2283 2284 list_add_tail(&buffer->list, &cdev->ll2->list); 2285 } 2286 2287 switch (QED_LEADING_HWFN(cdev)->hw_info.personality) { 2288 case QED_PCI_FCOE: 2289 conn_type = QED_LL2_TYPE_FCOE; 2290 break; 2291 case QED_PCI_ISCSI: 2292 conn_type = QED_LL2_TYPE_ISCSI; 2293 break; 2294 case QED_PCI_ETH_ROCE: 2295 conn_type = QED_LL2_TYPE_ROCE; 2296 break; 2297 default: 2298 conn_type = QED_LL2_TYPE_TEST; 2299 } 2300 2301 qed_ll2_set_conn_data(cdev, &data, params, conn_type, 2302 &cdev->ll2->handle, false); 2303 2304 rc = qed_ll2_acquire_connection(QED_LEADING_HWFN(cdev), &data); 2305 if (rc) { 2306 DP_INFO(cdev, "Failed to acquire LL2 connection\n"); 2307 goto fail; 2308 } 2309 2310 rc = qed_ll2_establish_connection(QED_LEADING_HWFN(cdev), 2311 cdev->ll2->handle); 2312 if (rc) { 2313 DP_INFO(cdev, "Failed to establish LL2 connection\n"); 2314 goto release_fail; 2315 } 2316 2317 /* Post all Rx buffers to FW */ 2318 spin_lock_bh(&cdev->ll2->lock); 2319 list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) { 2320 rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev), 2321 cdev->ll2->handle, 2322 buffer->phys_addr, 0, buffer, 1); 2323 if (rc) { 2324 DP_INFO(cdev, 2325 "Failed to post an Rx buffer; Deleting it\n"); 2326 dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr, 2327 cdev->ll2->rx_size, DMA_FROM_DEVICE); 2328 kfree(buffer->data); 2329 list_del(&buffer->list); 2330 kfree(buffer); 2331 } else { 2332 cdev->ll2->rx_cnt++; 2333 } 2334 } 2335 spin_unlock_bh(&cdev->ll2->lock); 2336 2337 if (!cdev->ll2->rx_cnt) { 2338 DP_INFO(cdev, "Failed passing even a single Rx buffer\n"); 2339 goto release_terminate; 2340 } 2341 2342 if (!is_valid_ether_addr(params->ll2_mac_address)) { 2343 DP_INFO(cdev, "Invalid Ethernet address\n"); 2344 goto release_terminate; 2345 } 2346 2347 if (QED_LEADING_HWFN(cdev)->hw_info.personality == QED_PCI_ISCSI) { 2348 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Starting OOO LL2 queue\n"); 2349 rc = qed_ll2_start_ooo(cdev, params); 2350 if (rc) { 2351 DP_INFO(cdev, 2352 "Failed to initialize the OOO LL2 queue\n"); 2353 goto release_terminate; 2354 } 2355 } 2356 2357 p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev)); 2358 if (!p_ptt) { 2359 DP_INFO(cdev, "Failed to acquire PTT\n"); 2360 goto release_terminate; 2361 } 2362 2363 rc = qed_llh_add_mac_filter(QED_LEADING_HWFN(cdev), p_ptt, 2364 params->ll2_mac_address); 2365 qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt); 2366 if (rc) { 2367 DP_ERR(cdev, "Failed to allocate LLH filter\n"); 2368 goto release_terminate_all; 2369 } 2370 2371 ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address); 2372 return 0; 2373 2374 release_terminate_all: 2375 2376 release_terminate: 2377 qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle); 2378 release_fail: 2379 qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle); 2380 fail: 2381 qed_ll2_kill_buffers(cdev); 2382 cdev->ll2->handle = QED_LL2_UNUSED_HANDLE; 2383 return -EINVAL; 2384 } 2385 2386 static int qed_ll2_stop(struct qed_dev *cdev) 2387 { 2388 struct qed_ptt *p_ptt; 2389 int rc; 2390 2391 if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE) 2392 return 0; 2393 2394 p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev)); 2395 if (!p_ptt) { 2396 DP_INFO(cdev, "Failed to acquire PTT\n"); 2397 goto fail; 2398 } 2399 2400 qed_llh_remove_mac_filter(QED_LEADING_HWFN(cdev), p_ptt, 2401 cdev->ll2_mac_address); 2402 qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt); 2403 eth_zero_addr(cdev->ll2_mac_address); 2404 2405 if (QED_LEADING_HWFN(cdev)->hw_info.personality == QED_PCI_ISCSI) 2406 qed_ll2_stop_ooo(cdev); 2407 2408 rc = qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), 2409 cdev->ll2->handle); 2410 if (rc) 2411 DP_INFO(cdev, "Failed to terminate LL2 connection\n"); 2412 2413 qed_ll2_kill_buffers(cdev); 2414 2415 qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle); 2416 cdev->ll2->handle = QED_LL2_UNUSED_HANDLE; 2417 2418 return rc; 2419 fail: 2420 return -EINVAL; 2421 } 2422 2423 static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb, 2424 unsigned long xmit_flags) 2425 { 2426 struct qed_ll2_tx_pkt_info pkt; 2427 const skb_frag_t *frag; 2428 int rc = -EINVAL, i; 2429 dma_addr_t mapping; 2430 u16 vlan = 0; 2431 u8 flags = 0; 2432 2433 if (unlikely(skb->ip_summed != CHECKSUM_NONE)) { 2434 DP_INFO(cdev, "Cannot transmit a checksummed packet\n"); 2435 return -EINVAL; 2436 } 2437 2438 if (1 + skb_shinfo(skb)->nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET) { 2439 DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n", 2440 1 + skb_shinfo(skb)->nr_frags); 2441 return -EINVAL; 2442 } 2443 2444 mapping = dma_map_single(&cdev->pdev->dev, skb->data, 2445 skb->len, DMA_TO_DEVICE); 2446 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) { 2447 DP_NOTICE(cdev, "SKB mapping failed\n"); 2448 return -EINVAL; 2449 } 2450 2451 /* Request HW to calculate IP csum */ 2452 if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) && 2453 ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6)) 2454 flags |= BIT(CORE_TX_BD_DATA_IP_CSUM_SHIFT); 2455 2456 if (skb_vlan_tag_present(skb)) { 2457 vlan = skb_vlan_tag_get(skb); 2458 flags |= BIT(CORE_TX_BD_DATA_VLAN_INSERTION_SHIFT); 2459 } 2460 2461 memset(&pkt, 0, sizeof(pkt)); 2462 pkt.num_of_bds = 1 + skb_shinfo(skb)->nr_frags; 2463 pkt.vlan = vlan; 2464 pkt.bd_flags = flags; 2465 pkt.tx_dest = QED_LL2_TX_DEST_NW; 2466 pkt.first_frag = mapping; 2467 pkt.first_frag_len = skb->len; 2468 pkt.cookie = skb; 2469 if (test_bit(QED_MF_UFP_SPECIFIC, &cdev->mf_bits) && 2470 test_bit(QED_LL2_XMIT_FLAGS_FIP_DISCOVERY, &xmit_flags)) 2471 pkt.remove_stag = true; 2472 2473 rc = qed_ll2_prepare_tx_packet(&cdev->hwfns[0], cdev->ll2->handle, 2474 &pkt, 1); 2475 if (rc) 2476 goto err; 2477 2478 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 2479 frag = &skb_shinfo(skb)->frags[i]; 2480 2481 mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0, 2482 skb_frag_size(frag), DMA_TO_DEVICE); 2483 2484 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) { 2485 DP_NOTICE(cdev, 2486 "Unable to map frag - dropping packet\n"); 2487 goto err; 2488 } 2489 2490 rc = qed_ll2_set_fragment_of_tx_packet(QED_LEADING_HWFN(cdev), 2491 cdev->ll2->handle, 2492 mapping, 2493 skb_frag_size(frag)); 2494 2495 /* if failed not much to do here, partial packet has been posted 2496 * we can't free memory, will need to wait for completion. 2497 */ 2498 if (rc) 2499 goto err2; 2500 } 2501 2502 return 0; 2503 2504 err: 2505 dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE); 2506 2507 err2: 2508 return rc; 2509 } 2510 2511 static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats) 2512 { 2513 if (!cdev->ll2) 2514 return -EINVAL; 2515 2516 return qed_ll2_get_stats(QED_LEADING_HWFN(cdev), 2517 cdev->ll2->handle, stats); 2518 } 2519 2520 const struct qed_ll2_ops qed_ll2_ops_pass = { 2521 .start = &qed_ll2_start, 2522 .stop = &qed_ll2_stop, 2523 .start_xmit = &qed_ll2_start_xmit, 2524 .register_cb_ops = &qed_ll2_register_cb_ops, 2525 .get_stats = &qed_ll2_stats, 2526 }; 2527 2528 int qed_ll2_alloc_if(struct qed_dev *cdev) 2529 { 2530 cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL); 2531 return cdev->ll2 ? 0 : -ENOMEM; 2532 } 2533 2534 void qed_ll2_dealloc_if(struct qed_dev *cdev) 2535 { 2536 kfree(cdev->ll2); 2537 cdev->ll2 = NULL; 2538 } 2539