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_registered)
67 #define QED_LL2_TX_REGISTERED(ll2)	((ll2)->tx_queue.b_cb_registered)
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 static void qed_ll2b_complete_rx_packet(void *cxt,
162 					struct qed_ll2_comp_rx_data *data)
163 {
164 	struct qed_hwfn *p_hwfn = cxt;
165 	struct qed_ll2_buffer *buffer = data->cookie;
166 	struct qed_dev *cdev = p_hwfn->cdev;
167 	dma_addr_t new_phys_addr;
168 	struct sk_buff *skb;
169 	bool reuse = false;
170 	int rc = -EINVAL;
171 	u8 *new_data;
172 
173 	DP_VERBOSE(p_hwfn,
174 		   (NETIF_MSG_RX_STATUS | QED_MSG_STORAGE | NETIF_MSG_PKTDATA),
175 		   "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",
176 		   (u64)data->rx_buf_addr,
177 		   data->u.placement_offset,
178 		   data->length.packet_length,
179 		   data->parse_flags,
180 		   data->vlan, data->opaque_data_0, data->opaque_data_1);
181 
182 	if ((cdev->dp_module & NETIF_MSG_PKTDATA) && buffer->data) {
183 		print_hex_dump(KERN_INFO, "",
184 			       DUMP_PREFIX_OFFSET, 16, 1,
185 			       buffer->data, data->length.packet_length, false);
186 	}
187 
188 	/* Determine if data is valid */
189 	if (data->length.packet_length < ETH_HLEN)
190 		reuse = true;
191 
192 	/* Allocate a replacement for buffer; Reuse upon failure */
193 	if (!reuse)
194 		rc = qed_ll2_alloc_buffer(p_hwfn->cdev, &new_data,
195 					  &new_phys_addr);
196 
197 	/* If need to reuse or there's no replacement buffer, repost this */
198 	if (rc)
199 		goto out_post;
200 	dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
201 			 cdev->ll2->rx_size, DMA_FROM_DEVICE);
202 
203 	skb = build_skb(buffer->data, 0);
204 	if (!skb) {
205 		DP_INFO(cdev, "Failed to build SKB\n");
206 		kfree(buffer->data);
207 		goto out_post1;
208 	}
209 
210 	data->u.placement_offset += NET_SKB_PAD;
211 	skb_reserve(skb, data->u.placement_offset);
212 	skb_put(skb, data->length.packet_length);
213 	skb_checksum_none_assert(skb);
214 
215 	/* Get parital ethernet information instead of eth_type_trans(),
216 	 * Since we don't have an associated net_device.
217 	 */
218 	skb_reset_mac_header(skb);
219 	skb->protocol = eth_hdr(skb)->h_proto;
220 
221 	/* Pass SKB onward */
222 	if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) {
223 		if (data->vlan)
224 			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
225 					       data->vlan);
226 		cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb,
227 				      data->opaque_data_0,
228 				      data->opaque_data_1);
229 	} else {
230 		DP_VERBOSE(p_hwfn, (NETIF_MSG_RX_STATUS | NETIF_MSG_PKTDATA |
231 				    QED_MSG_LL2 | QED_MSG_STORAGE),
232 			   "Dropping the packet\n");
233 		kfree(buffer->data);
234 	}
235 
236 out_post1:
237 	/* Update Buffer information and update FW producer */
238 	buffer->data = new_data;
239 	buffer->phys_addr = new_phys_addr;
240 
241 out_post:
242 	rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev), cdev->ll2->handle,
243 				    buffer->phys_addr, 0,  buffer, 1);
244 
245 	if (rc)
246 		qed_ll2_dealloc_buffer(cdev, buffer);
247 }
248 
249 static struct qed_ll2_info *__qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
250 						    u8 connection_handle,
251 						    bool b_lock,
252 						    bool b_only_active)
253 {
254 	struct qed_ll2_info *p_ll2_conn, *p_ret = NULL;
255 
256 	if (connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS)
257 		return NULL;
258 
259 	if (!p_hwfn->p_ll2_info)
260 		return NULL;
261 
262 	p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
263 
264 	if (b_only_active) {
265 		if (b_lock)
266 			mutex_lock(&p_ll2_conn->mutex);
267 		if (p_ll2_conn->b_active)
268 			p_ret = p_ll2_conn;
269 		if (b_lock)
270 			mutex_unlock(&p_ll2_conn->mutex);
271 	} else {
272 		p_ret = p_ll2_conn;
273 	}
274 
275 	return p_ret;
276 }
277 
278 static struct qed_ll2_info *qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
279 						  u8 connection_handle)
280 {
281 	return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, true);
282 }
283 
284 static struct qed_ll2_info *qed_ll2_handle_sanity_lock(struct qed_hwfn *p_hwfn,
285 						       u8 connection_handle)
286 {
287 	return __qed_ll2_handle_sanity(p_hwfn, connection_handle, true, true);
288 }
289 
290 static struct qed_ll2_info *qed_ll2_handle_sanity_inactive(struct qed_hwfn
291 							   *p_hwfn,
292 							   u8 connection_handle)
293 {
294 	return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, false);
295 }
296 
297 static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
298 {
299 	bool b_last_packet = false, b_last_frag = false;
300 	struct qed_ll2_tx_packet *p_pkt = NULL;
301 	struct qed_ll2_info *p_ll2_conn;
302 	struct qed_ll2_tx_queue *p_tx;
303 	unsigned long flags = 0;
304 	dma_addr_t tx_frag;
305 
306 	p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
307 	if (!p_ll2_conn)
308 		return;
309 
310 	p_tx = &p_ll2_conn->tx_queue;
311 
312 	spin_lock_irqsave(&p_tx->lock, flags);
313 	while (!list_empty(&p_tx->active_descq)) {
314 		p_pkt = list_first_entry(&p_tx->active_descq,
315 					 struct qed_ll2_tx_packet, list_entry);
316 		if (!p_pkt)
317 			break;
318 
319 		list_del(&p_pkt->list_entry);
320 		b_last_packet = list_empty(&p_tx->active_descq);
321 		list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
322 		spin_unlock_irqrestore(&p_tx->lock, flags);
323 		if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
324 			struct qed_ooo_buffer *p_buffer;
325 
326 			p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
327 			qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
328 						p_buffer);
329 		} else {
330 			p_tx->cur_completing_packet = *p_pkt;
331 			p_tx->cur_completing_bd_idx = 1;
332 			b_last_frag =
333 				p_tx->cur_completing_bd_idx == p_pkt->bd_used;
334 			tx_frag = p_pkt->bds_set[0].tx_frag;
335 			p_ll2_conn->cbs.tx_release_cb(p_ll2_conn->cbs.cookie,
336 						      p_ll2_conn->my_id,
337 						      p_pkt->cookie,
338 						      tx_frag,
339 						      b_last_frag,
340 						      b_last_packet);
341 		}
342 		spin_lock_irqsave(&p_tx->lock, flags);
343 	}
344 	spin_unlock_irqrestore(&p_tx->lock, flags);
345 }
346 
347 static int qed_ll2_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
348 {
349 	struct qed_ll2_info *p_ll2_conn = p_cookie;
350 	struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
351 	u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0;
352 	struct qed_ll2_tx_packet *p_pkt;
353 	bool b_last_frag = false;
354 	unsigned long flags;
355 	int rc = -EINVAL;
356 
357 	spin_lock_irqsave(&p_tx->lock, flags);
358 	if (p_tx->b_completing_packet) {
359 		rc = -EBUSY;
360 		goto out;
361 	}
362 
363 	new_idx = le16_to_cpu(*p_tx->p_fw_cons);
364 	num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
365 	while (num_bds) {
366 		if (list_empty(&p_tx->active_descq))
367 			goto out;
368 
369 		p_pkt = list_first_entry(&p_tx->active_descq,
370 					 struct qed_ll2_tx_packet, list_entry);
371 		if (!p_pkt)
372 			goto out;
373 
374 		p_tx->b_completing_packet = true;
375 		p_tx->cur_completing_packet = *p_pkt;
376 		num_bds_in_packet = p_pkt->bd_used;
377 		list_del(&p_pkt->list_entry);
378 
379 		if (num_bds < num_bds_in_packet) {
380 			DP_NOTICE(p_hwfn,
381 				  "Rest of BDs does not cover whole packet\n");
382 			goto out;
383 		}
384 
385 		num_bds -= num_bds_in_packet;
386 		p_tx->bds_idx += num_bds_in_packet;
387 		while (num_bds_in_packet--)
388 			qed_chain_consume(&p_tx->txq_chain);
389 
390 		p_tx->cur_completing_bd_idx = 1;
391 		b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used;
392 		list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
393 
394 		spin_unlock_irqrestore(&p_tx->lock, flags);
395 
396 		p_ll2_conn->cbs.tx_comp_cb(p_ll2_conn->cbs.cookie,
397 					   p_ll2_conn->my_id,
398 					   p_pkt->cookie,
399 					   p_pkt->bds_set[0].tx_frag,
400 					   b_last_frag, !num_bds);
401 
402 		spin_lock_irqsave(&p_tx->lock, flags);
403 	}
404 
405 	p_tx->b_completing_packet = false;
406 	rc = 0;
407 out:
408 	spin_unlock_irqrestore(&p_tx->lock, flags);
409 	return rc;
410 }
411 
412 static void qed_ll2_rxq_parse_gsi(struct qed_hwfn *p_hwfn,
413 				  union core_rx_cqe_union *p_cqe,
414 				  struct qed_ll2_comp_rx_data *data)
415 {
416 	data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_gsi.parse_flags.flags);
417 	data->length.data_length = le16_to_cpu(p_cqe->rx_cqe_gsi.data_length);
418 	data->vlan = le16_to_cpu(p_cqe->rx_cqe_gsi.vlan);
419 	data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrhi);
420 	data->opaque_data_1 = le16_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrlo);
421 	data->u.data_length_error = p_cqe->rx_cqe_gsi.data_length_error;
422 	data->qp_id = le16_to_cpu(p_cqe->rx_cqe_gsi.qp_id);
423 
424 	data->src_qp = le32_to_cpu(p_cqe->rx_cqe_gsi.src_qp);
425 }
426 
427 static void qed_ll2_rxq_parse_reg(struct qed_hwfn *p_hwfn,
428 				  union core_rx_cqe_union *p_cqe,
429 				  struct qed_ll2_comp_rx_data *data)
430 {
431 	data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_fp.parse_flags.flags);
432 	data->err_flags = le16_to_cpu(p_cqe->rx_cqe_fp.err_flags.flags);
433 	data->length.packet_length =
434 	    le16_to_cpu(p_cqe->rx_cqe_fp.packet_length);
435 	data->vlan = le16_to_cpu(p_cqe->rx_cqe_fp.vlan);
436 	data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[0]);
437 	data->opaque_data_1 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[1]);
438 	data->u.placement_offset = p_cqe->rx_cqe_fp.placement_offset;
439 }
440 
441 static int
442 qed_ll2_handle_slowpath(struct qed_hwfn *p_hwfn,
443 			struct qed_ll2_info *p_ll2_conn,
444 			union core_rx_cqe_union *p_cqe,
445 			unsigned long *p_lock_flags)
446 {
447 	struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
448 	struct core_rx_slow_path_cqe *sp_cqe;
449 
450 	sp_cqe = &p_cqe->rx_cqe_sp;
451 	if (sp_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH) {
452 		DP_NOTICE(p_hwfn,
453 			  "LL2 - unexpected Rx CQE slowpath ramrod_cmd_id:%d\n",
454 			  sp_cqe->ramrod_cmd_id);
455 		return -EINVAL;
456 	}
457 
458 	if (!p_ll2_conn->cbs.slowpath_cb) {
459 		DP_NOTICE(p_hwfn,
460 			  "LL2 - received RX_QUEUE_FLUSH but no callback was provided\n");
461 		return -EINVAL;
462 	}
463 
464 	spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
465 
466 	p_ll2_conn->cbs.slowpath_cb(p_ll2_conn->cbs.cookie,
467 				    p_ll2_conn->my_id,
468 				    le32_to_cpu(sp_cqe->opaque_data.data[0]),
469 				    le32_to_cpu(sp_cqe->opaque_data.data[1]));
470 
471 	spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
472 
473 	return 0;
474 }
475 
476 static int
477 qed_ll2_rxq_handle_completion(struct qed_hwfn *p_hwfn,
478 			      struct qed_ll2_info *p_ll2_conn,
479 			      union core_rx_cqe_union *p_cqe,
480 			      unsigned long *p_lock_flags, 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 	struct qed_ll2_comp_rx_data data;
485 
486 	if (!list_empty(&p_rx->active_descq))
487 		p_pkt = list_first_entry(&p_rx->active_descq,
488 					 struct qed_ll2_rx_packet, list_entry);
489 	if (!p_pkt) {
490 		DP_NOTICE(p_hwfn,
491 			  "[%d] LL2 Rx completion but active_descq is empty\n",
492 			  p_ll2_conn->input.conn_type);
493 
494 		return -EIO;
495 	}
496 	list_del(&p_pkt->list_entry);
497 
498 	if (p_cqe->rx_cqe_sp.type == CORE_RX_CQE_TYPE_REGULAR)
499 		qed_ll2_rxq_parse_reg(p_hwfn, p_cqe, &data);
500 	else
501 		qed_ll2_rxq_parse_gsi(p_hwfn, p_cqe, &data);
502 	if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd)
503 		DP_NOTICE(p_hwfn,
504 			  "Mismatch between active_descq and the LL2 Rx chain\n");
505 
506 	list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
507 
508 	data.connection_handle = p_ll2_conn->my_id;
509 	data.cookie = p_pkt->cookie;
510 	data.rx_buf_addr = p_pkt->rx_buf_addr;
511 	data.b_last_packet = b_last_cqe;
512 
513 	spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
514 	p_ll2_conn->cbs.rx_comp_cb(p_ll2_conn->cbs.cookie, &data);
515 
516 	spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
517 
518 	return 0;
519 }
520 
521 static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie)
522 {
523 	struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)cookie;
524 	struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
525 	union core_rx_cqe_union *cqe = NULL;
526 	u16 cq_new_idx = 0, cq_old_idx = 0;
527 	unsigned long flags = 0;
528 	int rc = 0;
529 
530 	spin_lock_irqsave(&p_rx->lock, flags);
531 	cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
532 	cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
533 
534 	while (cq_new_idx != cq_old_idx) {
535 		bool b_last_cqe = (cq_new_idx == cq_old_idx);
536 
537 		cqe =
538 		    (union core_rx_cqe_union *)
539 		    qed_chain_consume(&p_rx->rcq_chain);
540 		cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
541 
542 		DP_VERBOSE(p_hwfn,
543 			   QED_MSG_LL2,
544 			   "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n",
545 			   cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type);
546 
547 		switch (cqe->rx_cqe_sp.type) {
548 		case CORE_RX_CQE_TYPE_SLOW_PATH:
549 			rc = qed_ll2_handle_slowpath(p_hwfn, p_ll2_conn,
550 						     cqe, &flags);
551 			break;
552 		case CORE_RX_CQE_TYPE_GSI_OFFLOAD:
553 		case CORE_RX_CQE_TYPE_REGULAR:
554 			rc = qed_ll2_rxq_handle_completion(p_hwfn, p_ll2_conn,
555 							   cqe, &flags,
556 							   b_last_cqe);
557 			break;
558 		default:
559 			rc = -EIO;
560 		}
561 	}
562 
563 	spin_unlock_irqrestore(&p_rx->lock, flags);
564 	return rc;
565 }
566 
567 static void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
568 {
569 	struct qed_ll2_info *p_ll2_conn = NULL;
570 	struct qed_ll2_rx_packet *p_pkt = NULL;
571 	struct qed_ll2_rx_queue *p_rx;
572 	unsigned long flags = 0;
573 
574 	p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
575 	if (!p_ll2_conn)
576 		return;
577 
578 	p_rx = &p_ll2_conn->rx_queue;
579 
580 	spin_lock_irqsave(&p_rx->lock, flags);
581 	while (!list_empty(&p_rx->active_descq)) {
582 		p_pkt = list_first_entry(&p_rx->active_descq,
583 					 struct qed_ll2_rx_packet, list_entry);
584 		if (!p_pkt)
585 			break;
586 		list_move_tail(&p_pkt->list_entry, &p_rx->free_descq);
587 		spin_unlock_irqrestore(&p_rx->lock, flags);
588 
589 		if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
590 			struct qed_ooo_buffer *p_buffer;
591 
592 			p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
593 			qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
594 						p_buffer);
595 		} else {
596 			dma_addr_t rx_buf_addr = p_pkt->rx_buf_addr;
597 			void *cookie = p_pkt->cookie;
598 			bool b_last;
599 
600 			b_last = list_empty(&p_rx->active_descq);
601 			p_ll2_conn->cbs.rx_release_cb(p_ll2_conn->cbs.cookie,
602 						      p_ll2_conn->my_id,
603 						      cookie,
604 						      rx_buf_addr, b_last);
605 		}
606 		spin_lock_irqsave(&p_rx->lock, flags);
607 	}
608 	spin_unlock_irqrestore(&p_rx->lock, flags);
609 }
610 
611 static bool
612 qed_ll2_lb_rxq_handler_slowpath(struct qed_hwfn *p_hwfn,
613 				struct core_rx_slow_path_cqe *p_cqe)
614 {
615 	struct ooo_opaque *iscsi_ooo;
616 	u32 cid;
617 
618 	if (p_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH)
619 		return false;
620 
621 	iscsi_ooo = (struct ooo_opaque *)&p_cqe->opaque_data;
622 	if (iscsi_ooo->ooo_opcode != TCP_EVENT_DELETE_ISLES)
623 		return false;
624 
625 	/* Need to make a flush */
626 	cid = le32_to_cpu(iscsi_ooo->cid);
627 	qed_ooo_release_connection_isles(p_hwfn, p_hwfn->p_ooo_info, cid);
628 
629 	return true;
630 }
631 
632 static int qed_ll2_lb_rxq_handler(struct qed_hwfn *p_hwfn,
633 				  struct qed_ll2_info *p_ll2_conn)
634 {
635 	struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
636 	u16 packet_length = 0, parse_flags = 0, vlan = 0;
637 	struct qed_ll2_rx_packet *p_pkt = NULL;
638 	u32 num_ooo_add_to_peninsula = 0, cid;
639 	union core_rx_cqe_union *cqe = NULL;
640 	u16 cq_new_idx = 0, cq_old_idx = 0;
641 	struct qed_ooo_buffer *p_buffer;
642 	struct ooo_opaque *iscsi_ooo;
643 	u8 placement_offset = 0;
644 	u8 cqe_type;
645 
646 	cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
647 	cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
648 	if (cq_new_idx == cq_old_idx)
649 		return 0;
650 
651 	while (cq_new_idx != cq_old_idx) {
652 		struct core_rx_fast_path_cqe *p_cqe_fp;
653 
654 		cqe = qed_chain_consume(&p_rx->rcq_chain);
655 		cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
656 		cqe_type = cqe->rx_cqe_sp.type;
657 
658 		if (cqe_type == CORE_RX_CQE_TYPE_SLOW_PATH)
659 			if (qed_ll2_lb_rxq_handler_slowpath(p_hwfn,
660 							    &cqe->rx_cqe_sp))
661 				continue;
662 
663 		if (cqe_type != CORE_RX_CQE_TYPE_REGULAR) {
664 			DP_NOTICE(p_hwfn,
665 				  "Got a non-regular LB LL2 completion [type 0x%02x]\n",
666 				  cqe_type);
667 			return -EINVAL;
668 		}
669 		p_cqe_fp = &cqe->rx_cqe_fp;
670 
671 		placement_offset = p_cqe_fp->placement_offset;
672 		parse_flags = le16_to_cpu(p_cqe_fp->parse_flags.flags);
673 		packet_length = le16_to_cpu(p_cqe_fp->packet_length);
674 		vlan = le16_to_cpu(p_cqe_fp->vlan);
675 		iscsi_ooo = (struct ooo_opaque *)&p_cqe_fp->opaque_data;
676 		qed_ooo_save_history_entry(p_hwfn, p_hwfn->p_ooo_info,
677 					   iscsi_ooo);
678 		cid = le32_to_cpu(iscsi_ooo->cid);
679 
680 		/* Process delete isle first */
681 		if (iscsi_ooo->drop_size)
682 			qed_ooo_delete_isles(p_hwfn, p_hwfn->p_ooo_info, cid,
683 					     iscsi_ooo->drop_isle,
684 					     iscsi_ooo->drop_size);
685 
686 		if (iscsi_ooo->ooo_opcode == TCP_EVENT_NOP)
687 			continue;
688 
689 		/* Now process create/add/join isles */
690 		if (list_empty(&p_rx->active_descq)) {
691 			DP_NOTICE(p_hwfn,
692 				  "LL2 OOO RX chain has no submitted buffers\n"
693 				  );
694 			return -EIO;
695 		}
696 
697 		p_pkt = list_first_entry(&p_rx->active_descq,
698 					 struct qed_ll2_rx_packet, list_entry);
699 
700 		if ((iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_NEW_ISLE) ||
701 		    (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_RIGHT) ||
702 		    (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_LEFT) ||
703 		    (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_PEN) ||
704 		    (iscsi_ooo->ooo_opcode == TCP_EVENT_JOIN)) {
705 			if (!p_pkt) {
706 				DP_NOTICE(p_hwfn,
707 					  "LL2 OOO RX packet is not valid\n");
708 				return -EIO;
709 			}
710 			list_del(&p_pkt->list_entry);
711 			p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
712 			p_buffer->packet_length = packet_length;
713 			p_buffer->parse_flags = parse_flags;
714 			p_buffer->vlan = vlan;
715 			p_buffer->placement_offset = placement_offset;
716 			qed_chain_consume(&p_rx->rxq_chain);
717 			list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
718 
719 			switch (iscsi_ooo->ooo_opcode) {
720 			case TCP_EVENT_ADD_NEW_ISLE:
721 				qed_ooo_add_new_isle(p_hwfn,
722 						     p_hwfn->p_ooo_info,
723 						     cid,
724 						     iscsi_ooo->ooo_isle,
725 						     p_buffer);
726 				break;
727 			case TCP_EVENT_ADD_ISLE_RIGHT:
728 				qed_ooo_add_new_buffer(p_hwfn,
729 						       p_hwfn->p_ooo_info,
730 						       cid,
731 						       iscsi_ooo->ooo_isle,
732 						       p_buffer,
733 						       QED_OOO_RIGHT_BUF);
734 				break;
735 			case TCP_EVENT_ADD_ISLE_LEFT:
736 				qed_ooo_add_new_buffer(p_hwfn,
737 						       p_hwfn->p_ooo_info,
738 						       cid,
739 						       iscsi_ooo->ooo_isle,
740 						       p_buffer,
741 						       QED_OOO_LEFT_BUF);
742 				break;
743 			case TCP_EVENT_JOIN:
744 				qed_ooo_add_new_buffer(p_hwfn,
745 						       p_hwfn->p_ooo_info,
746 						       cid,
747 						       iscsi_ooo->ooo_isle +
748 						       1,
749 						       p_buffer,
750 						       QED_OOO_LEFT_BUF);
751 				qed_ooo_join_isles(p_hwfn,
752 						   p_hwfn->p_ooo_info,
753 						   cid, iscsi_ooo->ooo_isle);
754 				break;
755 			case TCP_EVENT_ADD_PEN:
756 				num_ooo_add_to_peninsula++;
757 				qed_ooo_put_ready_buffer(p_hwfn,
758 							 p_hwfn->p_ooo_info,
759 							 p_buffer, true);
760 				break;
761 			}
762 		} else {
763 			DP_NOTICE(p_hwfn,
764 				  "Unexpected event (%d) TX OOO completion\n",
765 				  iscsi_ooo->ooo_opcode);
766 		}
767 	}
768 
769 	return 0;
770 }
771 
772 static void
773 qed_ooo_submit_tx_buffers(struct qed_hwfn *p_hwfn,
774 			  struct qed_ll2_info *p_ll2_conn)
775 {
776 	struct qed_ll2_tx_pkt_info tx_pkt;
777 	struct qed_ooo_buffer *p_buffer;
778 	u16 l4_hdr_offset_w;
779 	dma_addr_t first_frag;
780 	u8 bd_flags;
781 	int rc;
782 
783 	/* Submit Tx buffers here */
784 	while ((p_buffer = qed_ooo_get_ready_buffer(p_hwfn,
785 						    p_hwfn->p_ooo_info))) {
786 		l4_hdr_offset_w = 0;
787 		bd_flags = 0;
788 
789 		first_frag = p_buffer->rx_buffer_phys_addr +
790 			     p_buffer->placement_offset;
791 		SET_FIELD(bd_flags, CORE_TX_BD_DATA_FORCE_VLAN_MODE, 1);
792 		SET_FIELD(bd_flags, CORE_TX_BD_DATA_L4_PROTOCOL, 1);
793 
794 		memset(&tx_pkt, 0, sizeof(tx_pkt));
795 		tx_pkt.num_of_bds = 1;
796 		tx_pkt.vlan = p_buffer->vlan;
797 		tx_pkt.bd_flags = bd_flags;
798 		tx_pkt.l4_hdr_offset_w = l4_hdr_offset_w;
799 		switch (p_ll2_conn->tx_dest) {
800 		case CORE_TX_DEST_NW:
801 			tx_pkt.tx_dest = QED_LL2_TX_DEST_NW;
802 			break;
803 		case CORE_TX_DEST_LB:
804 			tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
805 			break;
806 		case CORE_TX_DEST_DROP:
807 		default:
808 			tx_pkt.tx_dest = QED_LL2_TX_DEST_DROP;
809 			break;
810 		}
811 		tx_pkt.first_frag = first_frag;
812 		tx_pkt.first_frag_len = p_buffer->packet_length;
813 		tx_pkt.cookie = p_buffer;
814 
815 		rc = qed_ll2_prepare_tx_packet(p_hwfn, p_ll2_conn->my_id,
816 					       &tx_pkt, true);
817 		if (rc) {
818 			qed_ooo_put_ready_buffer(p_hwfn, p_hwfn->p_ooo_info,
819 						 p_buffer, false);
820 			break;
821 		}
822 	}
823 }
824 
825 static void
826 qed_ooo_submit_rx_buffers(struct qed_hwfn *p_hwfn,
827 			  struct qed_ll2_info *p_ll2_conn)
828 {
829 	struct qed_ooo_buffer *p_buffer;
830 	int rc;
831 
832 	while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
833 						   p_hwfn->p_ooo_info))) {
834 		rc = qed_ll2_post_rx_buffer(p_hwfn,
835 					    p_ll2_conn->my_id,
836 					    p_buffer->rx_buffer_phys_addr,
837 					    0, p_buffer, true);
838 		if (rc) {
839 			qed_ooo_put_free_buffer(p_hwfn,
840 						p_hwfn->p_ooo_info, p_buffer);
841 			break;
842 		}
843 	}
844 }
845 
846 static int qed_ll2_lb_rxq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
847 {
848 	struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
849 	int rc;
850 
851 	if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
852 		return 0;
853 
854 	rc = qed_ll2_lb_rxq_handler(p_hwfn, p_ll2_conn);
855 	if (rc)
856 		return rc;
857 
858 	qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
859 	qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
860 
861 	return 0;
862 }
863 
864 static int qed_ll2_lb_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
865 {
866 	struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
867 	struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
868 	struct qed_ll2_tx_packet *p_pkt = NULL;
869 	struct qed_ooo_buffer *p_buffer;
870 	bool b_dont_submit_rx = false;
871 	u16 new_idx = 0, num_bds = 0;
872 	int rc;
873 
874 	if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
875 		return 0;
876 
877 	new_idx = le16_to_cpu(*p_tx->p_fw_cons);
878 	num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
879 
880 	if (!num_bds)
881 		return 0;
882 
883 	while (num_bds) {
884 		if (list_empty(&p_tx->active_descq))
885 			return -EINVAL;
886 
887 		p_pkt = list_first_entry(&p_tx->active_descq,
888 					 struct qed_ll2_tx_packet, list_entry);
889 		if (!p_pkt)
890 			return -EINVAL;
891 
892 		if (p_pkt->bd_used != 1) {
893 			DP_NOTICE(p_hwfn,
894 				  "Unexpectedly many BDs(%d) in TX OOO completion\n",
895 				  p_pkt->bd_used);
896 			return -EINVAL;
897 		}
898 
899 		list_del(&p_pkt->list_entry);
900 
901 		num_bds--;
902 		p_tx->bds_idx++;
903 		qed_chain_consume(&p_tx->txq_chain);
904 
905 		p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
906 		list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
907 
908 		if (b_dont_submit_rx) {
909 			qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
910 						p_buffer);
911 			continue;
912 		}
913 
914 		rc = qed_ll2_post_rx_buffer(p_hwfn, p_ll2_conn->my_id,
915 					    p_buffer->rx_buffer_phys_addr, 0,
916 					    p_buffer, true);
917 		if (rc != 0) {
918 			qed_ooo_put_free_buffer(p_hwfn,
919 						p_hwfn->p_ooo_info, p_buffer);
920 			b_dont_submit_rx = true;
921 		}
922 	}
923 
924 	qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
925 
926 	return 0;
927 }
928 
929 static void qed_ll2_stop_ooo(struct qed_dev *cdev)
930 {
931 	struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
932 	u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
933 
934 	DP_VERBOSE(cdev, QED_MSG_STORAGE, "Stopping LL2 OOO queue [%02x]\n",
935 		   *handle);
936 
937 	qed_ll2_terminate_connection(hwfn, *handle);
938 	qed_ll2_release_connection(hwfn, *handle);
939 	*handle = QED_LL2_UNUSED_HANDLE;
940 }
941 
942 static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn,
943 				     struct qed_ll2_info *p_ll2_conn,
944 				     u8 action_on_error)
945 {
946 	enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
947 	struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
948 	struct core_rx_start_ramrod_data *p_ramrod = NULL;
949 	struct qed_spq_entry *p_ent = NULL;
950 	struct qed_sp_init_data init_data;
951 	u16 cqe_pbl_size;
952 	int rc = 0;
953 
954 	/* Get SPQ entry */
955 	memset(&init_data, 0, sizeof(init_data));
956 	init_data.cid = p_ll2_conn->cid;
957 	init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
958 	init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
959 
960 	rc = qed_sp_init_request(p_hwfn, &p_ent,
961 				 CORE_RAMROD_RX_QUEUE_START,
962 				 PROTOCOLID_CORE, &init_data);
963 	if (rc)
964 		return rc;
965 
966 	p_ramrod = &p_ent->ramrod.core_rx_queue_start;
967 
968 	p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
969 	p_ramrod->sb_index = p_rx->rx_sb_index;
970 	p_ramrod->complete_event_flg = 1;
971 
972 	p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
973 	DMA_REGPAIR_LE(p_ramrod->bd_base, p_rx->rxq_chain.p_phys_addr);
974 	cqe_pbl_size = (u16)qed_chain_get_page_cnt(&p_rx->rcq_chain);
975 	p_ramrod->num_of_pbl_pages = cpu_to_le16(cqe_pbl_size);
976 	DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr,
977 		       qed_chain_get_pbl_phys(&p_rx->rcq_chain));
978 
979 	p_ramrod->drop_ttl0_flg = p_ll2_conn->input.rx_drop_ttl0_flg;
980 	p_ramrod->inner_vlan_stripping_en =
981 		p_ll2_conn->input.rx_vlan_removal_en;
982 
983 	if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) &&
984 	    p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE)
985 		p_ramrod->report_outer_vlan = 1;
986 	p_ramrod->queue_id = p_ll2_conn->queue_id;
987 	p_ramrod->main_func_queue = p_ll2_conn->main_func_queue ? 1 : 0;
988 
989 	if (test_bit(QED_MF_LL2_NON_UNICAST, &p_hwfn->cdev->mf_bits) &&
990 	    p_ramrod->main_func_queue && conn_type != QED_LL2_TYPE_ROCE &&
991 	    conn_type != QED_LL2_TYPE_IWARP) {
992 		p_ramrod->mf_si_bcast_accept_all = 1;
993 		p_ramrod->mf_si_mcast_accept_all = 1;
994 	} else {
995 		p_ramrod->mf_si_bcast_accept_all = 0;
996 		p_ramrod->mf_si_mcast_accept_all = 0;
997 	}
998 
999 	p_ramrod->action_on_error.error_type = action_on_error;
1000 	p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
1001 	return qed_spq_post(p_hwfn, p_ent, NULL);
1002 }
1003 
1004 static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn,
1005 				     struct qed_ll2_info *p_ll2_conn)
1006 {
1007 	enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
1008 	struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1009 	struct core_tx_start_ramrod_data *p_ramrod = NULL;
1010 	struct qed_spq_entry *p_ent = NULL;
1011 	struct qed_sp_init_data init_data;
1012 	u16 pq_id = 0, pbl_size;
1013 	int rc = -EINVAL;
1014 
1015 	if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
1016 		return 0;
1017 
1018 	if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
1019 		p_ll2_conn->tx_stats_en = 0;
1020 	else
1021 		p_ll2_conn->tx_stats_en = 1;
1022 
1023 	/* Get SPQ entry */
1024 	memset(&init_data, 0, sizeof(init_data));
1025 	init_data.cid = p_ll2_conn->cid;
1026 	init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1027 	init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1028 
1029 	rc = qed_sp_init_request(p_hwfn, &p_ent,
1030 				 CORE_RAMROD_TX_QUEUE_START,
1031 				 PROTOCOLID_CORE, &init_data);
1032 	if (rc)
1033 		return rc;
1034 
1035 	p_ramrod = &p_ent->ramrod.core_tx_queue_start;
1036 
1037 	p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
1038 	p_ramrod->sb_index = p_tx->tx_sb_index;
1039 	p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
1040 	p_ramrod->stats_en = p_ll2_conn->tx_stats_en;
1041 	p_ramrod->stats_id = p_ll2_conn->tx_stats_id;
1042 
1043 	DMA_REGPAIR_LE(p_ramrod->pbl_base_addr,
1044 		       qed_chain_get_pbl_phys(&p_tx->txq_chain));
1045 	pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain);
1046 	p_ramrod->pbl_size = cpu_to_le16(pbl_size);
1047 
1048 	switch (p_ll2_conn->input.tx_tc) {
1049 	case PURE_LB_TC:
1050 		pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB);
1051 		break;
1052 	case PKT_LB_TC:
1053 		pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OOO);
1054 		break;
1055 	default:
1056 		pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
1057 		break;
1058 	}
1059 
1060 	p_ramrod->qm_pq_id = cpu_to_le16(pq_id);
1061 
1062 	switch (conn_type) {
1063 	case QED_LL2_TYPE_FCOE:
1064 		p_ramrod->conn_type = PROTOCOLID_FCOE;
1065 		break;
1066 	case QED_LL2_TYPE_ISCSI:
1067 		p_ramrod->conn_type = PROTOCOLID_ISCSI;
1068 		break;
1069 	case QED_LL2_TYPE_ROCE:
1070 		p_ramrod->conn_type = PROTOCOLID_ROCE;
1071 		break;
1072 	case QED_LL2_TYPE_IWARP:
1073 		p_ramrod->conn_type = PROTOCOLID_IWARP;
1074 		break;
1075 	case QED_LL2_TYPE_OOO:
1076 		if (p_hwfn->hw_info.personality == QED_PCI_ISCSI)
1077 			p_ramrod->conn_type = PROTOCOLID_ISCSI;
1078 		else
1079 			p_ramrod->conn_type = PROTOCOLID_IWARP;
1080 		break;
1081 	default:
1082 		p_ramrod->conn_type = PROTOCOLID_ETH;
1083 		DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type);
1084 	}
1085 
1086 	p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
1087 
1088 	rc = qed_spq_post(p_hwfn, p_ent, NULL);
1089 	if (rc)
1090 		return rc;
1091 
1092 	rc = qed_db_recovery_add(p_hwfn->cdev, p_tx->doorbell_addr,
1093 				 &p_tx->db_msg, DB_REC_WIDTH_32B,
1094 				 DB_REC_KERNEL);
1095 	return rc;
1096 }
1097 
1098 static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn,
1099 				    struct qed_ll2_info *p_ll2_conn)
1100 {
1101 	struct core_rx_stop_ramrod_data *p_ramrod = NULL;
1102 	struct qed_spq_entry *p_ent = NULL;
1103 	struct qed_sp_init_data init_data;
1104 	int rc = -EINVAL;
1105 
1106 	/* Get SPQ entry */
1107 	memset(&init_data, 0, sizeof(init_data));
1108 	init_data.cid = p_ll2_conn->cid;
1109 	init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1110 	init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1111 
1112 	rc = qed_sp_init_request(p_hwfn, &p_ent,
1113 				 CORE_RAMROD_RX_QUEUE_STOP,
1114 				 PROTOCOLID_CORE, &init_data);
1115 	if (rc)
1116 		return rc;
1117 
1118 	p_ramrod = &p_ent->ramrod.core_rx_queue_stop;
1119 
1120 	p_ramrod->complete_event_flg = 1;
1121 	p_ramrod->queue_id = p_ll2_conn->queue_id;
1122 
1123 	return qed_spq_post(p_hwfn, p_ent, NULL);
1124 }
1125 
1126 static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn,
1127 				    struct qed_ll2_info *p_ll2_conn)
1128 {
1129 	struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1130 	struct qed_spq_entry *p_ent = NULL;
1131 	struct qed_sp_init_data init_data;
1132 	int rc = -EINVAL;
1133 	qed_db_recovery_del(p_hwfn->cdev, p_tx->doorbell_addr, &p_tx->db_msg);
1134 
1135 	/* Get SPQ entry */
1136 	memset(&init_data, 0, sizeof(init_data));
1137 	init_data.cid = p_ll2_conn->cid;
1138 	init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1139 	init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1140 
1141 	rc = qed_sp_init_request(p_hwfn, &p_ent,
1142 				 CORE_RAMROD_TX_QUEUE_STOP,
1143 				 PROTOCOLID_CORE, &init_data);
1144 	if (rc)
1145 		return rc;
1146 
1147 	return qed_spq_post(p_hwfn, p_ent, NULL);
1148 }
1149 
1150 static int
1151 qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
1152 			      struct qed_ll2_info *p_ll2_info)
1153 {
1154 	struct qed_ll2_rx_packet *p_descq;
1155 	u32 capacity;
1156 	int rc = 0;
1157 
1158 	if (!p_ll2_info->input.rx_num_desc)
1159 		goto out;
1160 
1161 	rc = qed_chain_alloc(p_hwfn->cdev,
1162 			     QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1163 			     QED_CHAIN_MODE_NEXT_PTR,
1164 			     QED_CHAIN_CNT_TYPE_U16,
1165 			     p_ll2_info->input.rx_num_desc,
1166 			     sizeof(struct core_rx_bd),
1167 			     &p_ll2_info->rx_queue.rxq_chain, NULL);
1168 	if (rc) {
1169 		DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n");
1170 		goto out;
1171 	}
1172 
1173 	capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain);
1174 	p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet),
1175 			  GFP_KERNEL);
1176 	if (!p_descq) {
1177 		rc = -ENOMEM;
1178 		DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n");
1179 		goto out;
1180 	}
1181 	p_ll2_info->rx_queue.descq_array = p_descq;
1182 
1183 	rc = qed_chain_alloc(p_hwfn->cdev,
1184 			     QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1185 			     QED_CHAIN_MODE_PBL,
1186 			     QED_CHAIN_CNT_TYPE_U16,
1187 			     p_ll2_info->input.rx_num_desc,
1188 			     sizeof(struct core_rx_fast_path_cqe),
1189 			     &p_ll2_info->rx_queue.rcq_chain, NULL);
1190 	if (rc) {
1191 		DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n");
1192 		goto out;
1193 	}
1194 
1195 	DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1196 		   "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n",
1197 		   p_ll2_info->input.conn_type, p_ll2_info->input.rx_num_desc);
1198 
1199 out:
1200 	return rc;
1201 }
1202 
1203 static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
1204 					 struct qed_ll2_info *p_ll2_info)
1205 {
1206 	struct qed_ll2_tx_packet *p_descq;
1207 	u32 desc_size;
1208 	u32 capacity;
1209 	int rc = 0;
1210 
1211 	if (!p_ll2_info->input.tx_num_desc)
1212 		goto out;
1213 
1214 	rc = qed_chain_alloc(p_hwfn->cdev,
1215 			     QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1216 			     QED_CHAIN_MODE_PBL,
1217 			     QED_CHAIN_CNT_TYPE_U16,
1218 			     p_ll2_info->input.tx_num_desc,
1219 			     sizeof(struct core_tx_bd),
1220 			     &p_ll2_info->tx_queue.txq_chain, NULL);
1221 	if (rc)
1222 		goto out;
1223 
1224 	capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain);
1225 	/* First element is part of the packet, rest are flexibly added */
1226 	desc_size = (sizeof(*p_descq) +
1227 		     (p_ll2_info->input.tx_max_bds_per_packet - 1) *
1228 		     sizeof(p_descq->bds_set));
1229 
1230 	p_descq = kcalloc(capacity, desc_size, GFP_KERNEL);
1231 	if (!p_descq) {
1232 		rc = -ENOMEM;
1233 		goto out;
1234 	}
1235 	p_ll2_info->tx_queue.descq_mem = p_descq;
1236 
1237 	DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1238 		   "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n",
1239 		   p_ll2_info->input.conn_type, p_ll2_info->input.tx_num_desc);
1240 
1241 out:
1242 	if (rc)
1243 		DP_NOTICE(p_hwfn,
1244 			  "Can't allocate memory for Tx LL2 with 0x%08x buffers\n",
1245 			  p_ll2_info->input.tx_num_desc);
1246 	return rc;
1247 }
1248 
1249 static int
1250 qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn,
1251 			       struct qed_ll2_info *p_ll2_info, u16 mtu)
1252 {
1253 	struct qed_ooo_buffer *p_buf = NULL;
1254 	void *p_virt;
1255 	u16 buf_idx;
1256 	int rc = 0;
1257 
1258 	if (p_ll2_info->input.conn_type != QED_LL2_TYPE_OOO)
1259 		return rc;
1260 
1261 	/* Correct number of requested OOO buffers if needed */
1262 	if (!p_ll2_info->input.rx_num_ooo_buffers) {
1263 		u16 num_desc = p_ll2_info->input.rx_num_desc;
1264 
1265 		if (!num_desc)
1266 			return -EINVAL;
1267 		p_ll2_info->input.rx_num_ooo_buffers = num_desc * 2;
1268 	}
1269 
1270 	for (buf_idx = 0; buf_idx < p_ll2_info->input.rx_num_ooo_buffers;
1271 	     buf_idx++) {
1272 		p_buf = kzalloc(sizeof(*p_buf), GFP_KERNEL);
1273 		if (!p_buf) {
1274 			rc = -ENOMEM;
1275 			goto out;
1276 		}
1277 
1278 		p_buf->rx_buffer_size = mtu + 26 + ETH_CACHE_LINE_SIZE;
1279 		p_buf->rx_buffer_size = (p_buf->rx_buffer_size +
1280 					 ETH_CACHE_LINE_SIZE - 1) &
1281 					~(ETH_CACHE_LINE_SIZE - 1);
1282 		p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
1283 					    p_buf->rx_buffer_size,
1284 					    &p_buf->rx_buffer_phys_addr,
1285 					    GFP_KERNEL);
1286 		if (!p_virt) {
1287 			kfree(p_buf);
1288 			rc = -ENOMEM;
1289 			goto out;
1290 		}
1291 
1292 		p_buf->rx_buffer_virt_addr = p_virt;
1293 		qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buf);
1294 	}
1295 
1296 	DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1297 		   "Allocated [%04x] LL2 OOO buffers [each of size 0x%08x]\n",
1298 		   p_ll2_info->input.rx_num_ooo_buffers, p_buf->rx_buffer_size);
1299 
1300 out:
1301 	return rc;
1302 }
1303 
1304 static int
1305 qed_ll2_set_cbs(struct qed_ll2_info *p_ll2_info, const struct qed_ll2_cbs *cbs)
1306 {
1307 	if (!cbs || (!cbs->rx_comp_cb ||
1308 		     !cbs->rx_release_cb ||
1309 		     !cbs->tx_comp_cb || !cbs->tx_release_cb || !cbs->cookie))
1310 		return -EINVAL;
1311 
1312 	p_ll2_info->cbs.rx_comp_cb = cbs->rx_comp_cb;
1313 	p_ll2_info->cbs.rx_release_cb = cbs->rx_release_cb;
1314 	p_ll2_info->cbs.tx_comp_cb = cbs->tx_comp_cb;
1315 	p_ll2_info->cbs.tx_release_cb = cbs->tx_release_cb;
1316 	p_ll2_info->cbs.slowpath_cb = cbs->slowpath_cb;
1317 	p_ll2_info->cbs.cookie = cbs->cookie;
1318 
1319 	return 0;
1320 }
1321 
1322 static enum core_error_handle
1323 qed_ll2_get_error_choice(enum qed_ll2_error_handle err)
1324 {
1325 	switch (err) {
1326 	case QED_LL2_DROP_PACKET:
1327 		return LL2_DROP_PACKET;
1328 	case QED_LL2_DO_NOTHING:
1329 		return LL2_DO_NOTHING;
1330 	case QED_LL2_ASSERT:
1331 		return LL2_ASSERT;
1332 	default:
1333 		return LL2_DO_NOTHING;
1334 	}
1335 }
1336 
1337 int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data)
1338 {
1339 	struct qed_hwfn *p_hwfn = cxt;
1340 	qed_int_comp_cb_t comp_rx_cb, comp_tx_cb;
1341 	struct qed_ll2_info *p_ll2_info = NULL;
1342 	u8 i, *p_tx_max;
1343 	int rc;
1344 
1345 	if (!data->p_connection_handle || !p_hwfn->p_ll2_info)
1346 		return -EINVAL;
1347 
1348 	/* Find a free connection to be used */
1349 	for (i = 0; (i < QED_MAX_NUM_OF_LL2_CONNECTIONS); i++) {
1350 		mutex_lock(&p_hwfn->p_ll2_info[i].mutex);
1351 		if (p_hwfn->p_ll2_info[i].b_active) {
1352 			mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1353 			continue;
1354 		}
1355 
1356 		p_hwfn->p_ll2_info[i].b_active = true;
1357 		p_ll2_info = &p_hwfn->p_ll2_info[i];
1358 		mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1359 		break;
1360 	}
1361 	if (!p_ll2_info)
1362 		return -EBUSY;
1363 
1364 	memcpy(&p_ll2_info->input, &data->input, sizeof(p_ll2_info->input));
1365 
1366 	switch (data->input.tx_dest) {
1367 	case QED_LL2_TX_DEST_NW:
1368 		p_ll2_info->tx_dest = CORE_TX_DEST_NW;
1369 		break;
1370 	case QED_LL2_TX_DEST_LB:
1371 		p_ll2_info->tx_dest = CORE_TX_DEST_LB;
1372 		break;
1373 	case QED_LL2_TX_DEST_DROP:
1374 		p_ll2_info->tx_dest = CORE_TX_DEST_DROP;
1375 		break;
1376 	default:
1377 		return -EINVAL;
1378 	}
1379 
1380 	if (data->input.conn_type == QED_LL2_TYPE_OOO ||
1381 	    data->input.secondary_queue)
1382 		p_ll2_info->main_func_queue = false;
1383 	else
1384 		p_ll2_info->main_func_queue = true;
1385 
1386 	/* Correct maximum number of Tx BDs */
1387 	p_tx_max = &p_ll2_info->input.tx_max_bds_per_packet;
1388 	if (*p_tx_max == 0)
1389 		*p_tx_max = CORE_LL2_TX_MAX_BDS_PER_PACKET;
1390 	else
1391 		*p_tx_max = min_t(u8, *p_tx_max,
1392 				  CORE_LL2_TX_MAX_BDS_PER_PACKET);
1393 
1394 	rc = qed_ll2_set_cbs(p_ll2_info, data->cbs);
1395 	if (rc) {
1396 		DP_NOTICE(p_hwfn, "Invalid callback functions\n");
1397 		goto q_allocate_fail;
1398 	}
1399 
1400 	rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info);
1401 	if (rc)
1402 		goto q_allocate_fail;
1403 
1404 	rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info);
1405 	if (rc)
1406 		goto q_allocate_fail;
1407 
1408 	rc = qed_ll2_acquire_connection_ooo(p_hwfn, p_ll2_info,
1409 					    data->input.mtu);
1410 	if (rc)
1411 		goto q_allocate_fail;
1412 
1413 	/* Register callbacks for the Rx/Tx queues */
1414 	if (data->input.conn_type == QED_LL2_TYPE_OOO) {
1415 		comp_rx_cb = qed_ll2_lb_rxq_completion;
1416 		comp_tx_cb = qed_ll2_lb_txq_completion;
1417 	} else {
1418 		comp_rx_cb = qed_ll2_rxq_completion;
1419 		comp_tx_cb = qed_ll2_txq_completion;
1420 	}
1421 
1422 	if (data->input.rx_num_desc) {
1423 		qed_int_register_cb(p_hwfn, comp_rx_cb,
1424 				    &p_hwfn->p_ll2_info[i],
1425 				    &p_ll2_info->rx_queue.rx_sb_index,
1426 				    &p_ll2_info->rx_queue.p_fw_cons);
1427 		p_ll2_info->rx_queue.b_cb_registered = true;
1428 	}
1429 
1430 	if (data->input.tx_num_desc) {
1431 		qed_int_register_cb(p_hwfn,
1432 				    comp_tx_cb,
1433 				    &p_hwfn->p_ll2_info[i],
1434 				    &p_ll2_info->tx_queue.tx_sb_index,
1435 				    &p_ll2_info->tx_queue.p_fw_cons);
1436 		p_ll2_info->tx_queue.b_cb_registered = true;
1437 	}
1438 
1439 	*data->p_connection_handle = i;
1440 	return rc;
1441 
1442 q_allocate_fail:
1443 	qed_ll2_release_connection(p_hwfn, i);
1444 	return -ENOMEM;
1445 }
1446 
1447 static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn,
1448 					   struct qed_ll2_info *p_ll2_conn)
1449 {
1450 	enum qed_ll2_error_handle error_input;
1451 	enum core_error_handle error_mode;
1452 	u8 action_on_error = 0;
1453 
1454 	if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
1455 		return 0;
1456 
1457 	DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0);
1458 	error_input = p_ll2_conn->input.ai_err_packet_too_big;
1459 	error_mode = qed_ll2_get_error_choice(error_input);
1460 	SET_FIELD(action_on_error,
1461 		  CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, error_mode);
1462 	error_input = p_ll2_conn->input.ai_err_no_buf;
1463 	error_mode = qed_ll2_get_error_choice(error_input);
1464 	SET_FIELD(action_on_error, CORE_RX_ACTION_ON_ERROR_NO_BUFF, error_mode);
1465 
1466 	return qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error);
1467 }
1468 
1469 static void
1470 qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn,
1471 				 struct qed_ll2_info *p_ll2_conn)
1472 {
1473 	if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
1474 		return;
1475 
1476 	qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1477 	qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
1478 }
1479 
1480 int qed_ll2_establish_connection(void *cxt, u8 connection_handle)
1481 {
1482 	struct qed_hwfn *p_hwfn = cxt;
1483 	struct qed_ll2_info *p_ll2_conn;
1484 	struct qed_ll2_tx_packet *p_pkt;
1485 	struct qed_ll2_rx_queue *p_rx;
1486 	struct qed_ll2_tx_queue *p_tx;
1487 	struct qed_ptt *p_ptt;
1488 	int rc = -EINVAL;
1489 	u32 i, capacity;
1490 	u32 desc_size;
1491 	u8 qid;
1492 
1493 	p_ptt = qed_ptt_acquire(p_hwfn);
1494 	if (!p_ptt)
1495 		return -EAGAIN;
1496 
1497 	p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1498 	if (!p_ll2_conn) {
1499 		rc = -EINVAL;
1500 		goto out;
1501 	}
1502 
1503 	p_rx = &p_ll2_conn->rx_queue;
1504 	p_tx = &p_ll2_conn->tx_queue;
1505 
1506 	qed_chain_reset(&p_rx->rxq_chain);
1507 	qed_chain_reset(&p_rx->rcq_chain);
1508 	INIT_LIST_HEAD(&p_rx->active_descq);
1509 	INIT_LIST_HEAD(&p_rx->free_descq);
1510 	INIT_LIST_HEAD(&p_rx->posting_descq);
1511 	spin_lock_init(&p_rx->lock);
1512 	capacity = qed_chain_get_capacity(&p_rx->rxq_chain);
1513 	for (i = 0; i < capacity; i++)
1514 		list_add_tail(&p_rx->descq_array[i].list_entry,
1515 			      &p_rx->free_descq);
1516 	*p_rx->p_fw_cons = 0;
1517 
1518 	qed_chain_reset(&p_tx->txq_chain);
1519 	INIT_LIST_HEAD(&p_tx->active_descq);
1520 	INIT_LIST_HEAD(&p_tx->free_descq);
1521 	INIT_LIST_HEAD(&p_tx->sending_descq);
1522 	spin_lock_init(&p_tx->lock);
1523 	capacity = qed_chain_get_capacity(&p_tx->txq_chain);
1524 	/* First element is part of the packet, rest are flexibly added */
1525 	desc_size = (sizeof(*p_pkt) +
1526 		     (p_ll2_conn->input.tx_max_bds_per_packet - 1) *
1527 		     sizeof(p_pkt->bds_set));
1528 
1529 	for (i = 0; i < capacity; i++) {
1530 		p_pkt = p_tx->descq_mem + desc_size * i;
1531 		list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
1532 	}
1533 	p_tx->cur_completing_bd_idx = 0;
1534 	p_tx->bds_idx = 0;
1535 	p_tx->b_completing_packet = false;
1536 	p_tx->cur_send_packet = NULL;
1537 	p_tx->cur_send_frag_num = 0;
1538 	p_tx->cur_completing_frag_num = 0;
1539 	*p_tx->p_fw_cons = 0;
1540 
1541 	rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid);
1542 	if (rc)
1543 		goto out;
1544 
1545 	qid = p_hwfn->hw_info.resc_start[QED_LL2_QUEUE] + connection_handle;
1546 	p_ll2_conn->queue_id = qid;
1547 	p_ll2_conn->tx_stats_id = qid;
1548 	p_rx->set_prod_addr = (u8 __iomem *)p_hwfn->regview +
1549 					    GTT_BAR0_MAP_REG_TSDM_RAM +
1550 					    TSTORM_LL2_RX_PRODS_OFFSET(qid);
1551 	p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells +
1552 					    qed_db_addr(p_ll2_conn->cid,
1553 							DQ_DEMS_LEGACY);
1554 	/* prepare db data */
1555 	SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
1556 	SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET);
1557 	SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_VAL_SEL,
1558 		  DQ_XCM_CORE_TX_BD_PROD_CMD);
1559 	p_tx->db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
1560 
1561 
1562 	rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn);
1563 	if (rc)
1564 		goto out;
1565 
1566 	rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn);
1567 	if (rc)
1568 		goto out;
1569 
1570 	if (!QED_IS_RDMA_PERSONALITY(p_hwfn))
1571 		qed_wr(p_hwfn, p_ptt, PRS_REG_USE_LIGHT_L2, 1);
1572 
1573 	qed_ll2_establish_connection_ooo(p_hwfn, p_ll2_conn);
1574 
1575 	if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1576 		if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
1577 			qed_llh_add_protocol_filter(p_hwfn, p_ptt,
1578 						    ETH_P_FCOE, 0,
1579 						    QED_LLH_FILTER_ETHERTYPE);
1580 		qed_llh_add_protocol_filter(p_hwfn, p_ptt,
1581 					    ETH_P_FIP, 0,
1582 					    QED_LLH_FILTER_ETHERTYPE);
1583 	}
1584 
1585 out:
1586 	qed_ptt_release(p_hwfn, p_ptt);
1587 	return rc;
1588 }
1589 
1590 static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn,
1591 					     struct qed_ll2_rx_queue *p_rx,
1592 					     struct qed_ll2_rx_packet *p_curp)
1593 {
1594 	struct qed_ll2_rx_packet *p_posting_packet = NULL;
1595 	struct core_ll2_rx_prod rx_prod = { 0, 0, 0 };
1596 	bool b_notify_fw = false;
1597 	u16 bd_prod, cq_prod;
1598 
1599 	/* This handles the flushing of already posted buffers */
1600 	while (!list_empty(&p_rx->posting_descq)) {
1601 		p_posting_packet = list_first_entry(&p_rx->posting_descq,
1602 						    struct qed_ll2_rx_packet,
1603 						    list_entry);
1604 		list_move_tail(&p_posting_packet->list_entry,
1605 			       &p_rx->active_descq);
1606 		b_notify_fw = true;
1607 	}
1608 
1609 	/* This handles the supplied packet [if there is one] */
1610 	if (p_curp) {
1611 		list_add_tail(&p_curp->list_entry, &p_rx->active_descq);
1612 		b_notify_fw = true;
1613 	}
1614 
1615 	if (!b_notify_fw)
1616 		return;
1617 
1618 	bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain);
1619 	cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain);
1620 	rx_prod.bd_prod = cpu_to_le16(bd_prod);
1621 	rx_prod.cqe_prod = cpu_to_le16(cq_prod);
1622 
1623 	/* Make sure chain element is updated before ringing the doorbell */
1624 	dma_wmb();
1625 
1626 	DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod));
1627 }
1628 
1629 int qed_ll2_post_rx_buffer(void *cxt,
1630 			   u8 connection_handle,
1631 			   dma_addr_t addr,
1632 			   u16 buf_len, void *cookie, u8 notify_fw)
1633 {
1634 	struct qed_hwfn *p_hwfn = cxt;
1635 	struct core_rx_bd_with_buff_len *p_curb = NULL;
1636 	struct qed_ll2_rx_packet *p_curp = NULL;
1637 	struct qed_ll2_info *p_ll2_conn;
1638 	struct qed_ll2_rx_queue *p_rx;
1639 	unsigned long flags;
1640 	void *p_data;
1641 	int rc = 0;
1642 
1643 	p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1644 	if (!p_ll2_conn)
1645 		return -EINVAL;
1646 	p_rx = &p_ll2_conn->rx_queue;
1647 
1648 	spin_lock_irqsave(&p_rx->lock, flags);
1649 	if (!list_empty(&p_rx->free_descq))
1650 		p_curp = list_first_entry(&p_rx->free_descq,
1651 					  struct qed_ll2_rx_packet, list_entry);
1652 	if (p_curp) {
1653 		if (qed_chain_get_elem_left(&p_rx->rxq_chain) &&
1654 		    qed_chain_get_elem_left(&p_rx->rcq_chain)) {
1655 			p_data = qed_chain_produce(&p_rx->rxq_chain);
1656 			p_curb = (struct core_rx_bd_with_buff_len *)p_data;
1657 			qed_chain_produce(&p_rx->rcq_chain);
1658 		}
1659 	}
1660 
1661 	/* If we're lacking entires, let's try to flush buffers to FW */
1662 	if (!p_curp || !p_curb) {
1663 		rc = -EBUSY;
1664 		p_curp = NULL;
1665 		goto out_notify;
1666 	}
1667 
1668 	/* We have an Rx packet we can fill */
1669 	DMA_REGPAIR_LE(p_curb->addr, addr);
1670 	p_curb->buff_length = cpu_to_le16(buf_len);
1671 	p_curp->rx_buf_addr = addr;
1672 	p_curp->cookie = cookie;
1673 	p_curp->rxq_bd = p_curb;
1674 	p_curp->buf_length = buf_len;
1675 	list_del(&p_curp->list_entry);
1676 
1677 	/* Check if we only want to enqueue this packet without informing FW */
1678 	if (!notify_fw) {
1679 		list_add_tail(&p_curp->list_entry, &p_rx->posting_descq);
1680 		goto out;
1681 	}
1682 
1683 out_notify:
1684 	qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp);
1685 out:
1686 	spin_unlock_irqrestore(&p_rx->lock, flags);
1687 	return rc;
1688 }
1689 
1690 static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn,
1691 					  struct qed_ll2_tx_queue *p_tx,
1692 					  struct qed_ll2_tx_packet *p_curp,
1693 					  struct qed_ll2_tx_pkt_info *pkt,
1694 					  u8 notify_fw)
1695 {
1696 	list_del(&p_curp->list_entry);
1697 	p_curp->cookie = pkt->cookie;
1698 	p_curp->bd_used = pkt->num_of_bds;
1699 	p_curp->notify_fw = notify_fw;
1700 	p_tx->cur_send_packet = p_curp;
1701 	p_tx->cur_send_frag_num = 0;
1702 
1703 	p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = pkt->first_frag;
1704 	p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = pkt->first_frag_len;
1705 	p_tx->cur_send_frag_num++;
1706 }
1707 
1708 static void
1709 qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn,
1710 				 struct qed_ll2_info *p_ll2,
1711 				 struct qed_ll2_tx_packet *p_curp,
1712 				 struct qed_ll2_tx_pkt_info *pkt)
1713 {
1714 	struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain;
1715 	u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain);
1716 	struct core_tx_bd *start_bd = NULL;
1717 	enum core_roce_flavor_type roce_flavor;
1718 	enum core_tx_dest tx_dest;
1719 	u16 bd_data = 0, frag_idx;
1720 
1721 	roce_flavor = (pkt->qed_roce_flavor == QED_LL2_ROCE) ? CORE_ROCE
1722 							     : CORE_RROCE;
1723 
1724 	switch (pkt->tx_dest) {
1725 	case QED_LL2_TX_DEST_NW:
1726 		tx_dest = CORE_TX_DEST_NW;
1727 		break;
1728 	case QED_LL2_TX_DEST_LB:
1729 		tx_dest = CORE_TX_DEST_LB;
1730 		break;
1731 	case QED_LL2_TX_DEST_DROP:
1732 		tx_dest = CORE_TX_DEST_DROP;
1733 		break;
1734 	default:
1735 		tx_dest = CORE_TX_DEST_LB;
1736 		break;
1737 	}
1738 
1739 	start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1740 	if (QED_IS_IWARP_PERSONALITY(p_hwfn) &&
1741 	    p_ll2->input.conn_type == QED_LL2_TYPE_OOO) {
1742 		start_bd->nw_vlan_or_lb_echo =
1743 		    cpu_to_le16(IWARP_LL2_IN_ORDER_TX_QUEUE);
1744 	} else {
1745 		start_bd->nw_vlan_or_lb_echo = cpu_to_le16(pkt->vlan);
1746 		if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) &&
1747 		    p_ll2->input.conn_type == QED_LL2_TYPE_FCOE)
1748 			pkt->remove_stag = true;
1749 	}
1750 
1751 	SET_FIELD(start_bd->bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W,
1752 		  cpu_to_le16(pkt->l4_hdr_offset_w));
1753 	SET_FIELD(start_bd->bitfield1, CORE_TX_BD_TX_DST, tx_dest);
1754 	bd_data |= pkt->bd_flags;
1755 	SET_FIELD(bd_data, CORE_TX_BD_DATA_START_BD, 0x1);
1756 	SET_FIELD(bd_data, CORE_TX_BD_DATA_NBDS, pkt->num_of_bds);
1757 	SET_FIELD(bd_data, CORE_TX_BD_DATA_ROCE_FLAV, roce_flavor);
1758 	SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_CSUM, !!(pkt->enable_ip_cksum));
1759 	SET_FIELD(bd_data, CORE_TX_BD_DATA_L4_CSUM, !!(pkt->enable_l4_cksum));
1760 	SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_LEN, !!(pkt->calc_ip_len));
1761 	SET_FIELD(bd_data, CORE_TX_BD_DATA_DISABLE_STAG_INSERTION,
1762 		  !!(pkt->remove_stag));
1763 
1764 	start_bd->bd_data.as_bitfield = cpu_to_le16(bd_data);
1765 	DMA_REGPAIR_LE(start_bd->addr, pkt->first_frag);
1766 	start_bd->nbytes = cpu_to_le16(pkt->first_frag_len);
1767 
1768 	DP_VERBOSE(p_hwfn,
1769 		   (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1770 		   "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",
1771 		   p_ll2->queue_id,
1772 		   p_ll2->cid,
1773 		   p_ll2->input.conn_type,
1774 		   prod_idx,
1775 		   pkt->first_frag_len,
1776 		   pkt->num_of_bds,
1777 		   le32_to_cpu(start_bd->addr.hi),
1778 		   le32_to_cpu(start_bd->addr.lo));
1779 
1780 	if (p_ll2->tx_queue.cur_send_frag_num == pkt->num_of_bds)
1781 		return;
1782 
1783 	/* Need to provide the packet with additional BDs for frags */
1784 	for (frag_idx = p_ll2->tx_queue.cur_send_frag_num;
1785 	     frag_idx < pkt->num_of_bds; frag_idx++) {
1786 		struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd;
1787 
1788 		*p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1789 		(*p_bd)->bd_data.as_bitfield = 0;
1790 		(*p_bd)->bitfield1 = 0;
1791 		p_curp->bds_set[frag_idx].tx_frag = 0;
1792 		p_curp->bds_set[frag_idx].frag_len = 0;
1793 	}
1794 }
1795 
1796 /* This should be called while the Txq spinlock is being held */
1797 static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn,
1798 				     struct qed_ll2_info *p_ll2_conn)
1799 {
1800 	bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw;
1801 	struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1802 	struct qed_ll2_tx_packet *p_pkt = NULL;
1803 	u16 bd_prod;
1804 
1805 	/* If there are missing BDs, don't do anything now */
1806 	if (p_ll2_conn->tx_queue.cur_send_frag_num !=
1807 	    p_ll2_conn->tx_queue.cur_send_packet->bd_used)
1808 		return;
1809 
1810 	/* Push the current packet to the list and clean after it */
1811 	list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry,
1812 		      &p_ll2_conn->tx_queue.sending_descq);
1813 	p_ll2_conn->tx_queue.cur_send_packet = NULL;
1814 	p_ll2_conn->tx_queue.cur_send_frag_num = 0;
1815 
1816 	/* Notify FW of packet only if requested to */
1817 	if (!b_notify)
1818 		return;
1819 
1820 	bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain);
1821 
1822 	while (!list_empty(&p_tx->sending_descq)) {
1823 		p_pkt = list_first_entry(&p_tx->sending_descq,
1824 					 struct qed_ll2_tx_packet, list_entry);
1825 		if (!p_pkt)
1826 			break;
1827 
1828 		list_move_tail(&p_pkt->list_entry, &p_tx->active_descq);
1829 	}
1830 
1831 	p_tx->db_msg.spq_prod = cpu_to_le16(bd_prod);
1832 
1833 	/* Make sure the BDs data is updated before ringing the doorbell */
1834 	wmb();
1835 
1836 	DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&p_tx->db_msg));
1837 
1838 	DP_VERBOSE(p_hwfn,
1839 		   (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1840 		   "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n",
1841 		   p_ll2_conn->queue_id,
1842 		   p_ll2_conn->cid,
1843 		   p_ll2_conn->input.conn_type, p_tx->db_msg.spq_prod);
1844 }
1845 
1846 int qed_ll2_prepare_tx_packet(void *cxt,
1847 			      u8 connection_handle,
1848 			      struct qed_ll2_tx_pkt_info *pkt,
1849 			      bool notify_fw)
1850 {
1851 	struct qed_hwfn *p_hwfn = cxt;
1852 	struct qed_ll2_tx_packet *p_curp = NULL;
1853 	struct qed_ll2_info *p_ll2_conn = NULL;
1854 	struct qed_ll2_tx_queue *p_tx;
1855 	struct qed_chain *p_tx_chain;
1856 	unsigned long flags;
1857 	int rc = 0;
1858 
1859 	p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1860 	if (!p_ll2_conn)
1861 		return -EINVAL;
1862 	p_tx = &p_ll2_conn->tx_queue;
1863 	p_tx_chain = &p_tx->txq_chain;
1864 
1865 	if (pkt->num_of_bds > p_ll2_conn->input.tx_max_bds_per_packet)
1866 		return -EIO;
1867 
1868 	spin_lock_irqsave(&p_tx->lock, flags);
1869 	if (p_tx->cur_send_packet) {
1870 		rc = -EEXIST;
1871 		goto out;
1872 	}
1873 
1874 	/* Get entry, but only if we have tx elements for it */
1875 	if (!list_empty(&p_tx->free_descq))
1876 		p_curp = list_first_entry(&p_tx->free_descq,
1877 					  struct qed_ll2_tx_packet, list_entry);
1878 	if (p_curp && qed_chain_get_elem_left(p_tx_chain) < pkt->num_of_bds)
1879 		p_curp = NULL;
1880 
1881 	if (!p_curp) {
1882 		rc = -EBUSY;
1883 		goto out;
1884 	}
1885 
1886 	/* Prepare packet and BD, and perhaps send a doorbell to FW */
1887 	qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp, pkt, notify_fw);
1888 
1889 	qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp, pkt);
1890 
1891 	qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1892 
1893 out:
1894 	spin_unlock_irqrestore(&p_tx->lock, flags);
1895 	return rc;
1896 }
1897 
1898 int qed_ll2_set_fragment_of_tx_packet(void *cxt,
1899 				      u8 connection_handle,
1900 				      dma_addr_t addr, u16 nbytes)
1901 {
1902 	struct qed_ll2_tx_packet *p_cur_send_packet = NULL;
1903 	struct qed_hwfn *p_hwfn = cxt;
1904 	struct qed_ll2_info *p_ll2_conn = NULL;
1905 	u16 cur_send_frag_num = 0;
1906 	struct core_tx_bd *p_bd;
1907 	unsigned long flags;
1908 
1909 	p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1910 	if (!p_ll2_conn)
1911 		return -EINVAL;
1912 
1913 	if (!p_ll2_conn->tx_queue.cur_send_packet)
1914 		return -EINVAL;
1915 
1916 	p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet;
1917 	cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num;
1918 
1919 	if (cur_send_frag_num >= p_cur_send_packet->bd_used)
1920 		return -EINVAL;
1921 
1922 	/* Fill the BD information, and possibly notify FW */
1923 	p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd;
1924 	DMA_REGPAIR_LE(p_bd->addr, addr);
1925 	p_bd->nbytes = cpu_to_le16(nbytes);
1926 	p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr;
1927 	p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes;
1928 
1929 	p_ll2_conn->tx_queue.cur_send_frag_num++;
1930 
1931 	spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags);
1932 	qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1933 	spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags);
1934 
1935 	return 0;
1936 }
1937 
1938 int qed_ll2_terminate_connection(void *cxt, u8 connection_handle)
1939 {
1940 	struct qed_hwfn *p_hwfn = cxt;
1941 	struct qed_ll2_info *p_ll2_conn = NULL;
1942 	int rc = -EINVAL;
1943 	struct qed_ptt *p_ptt;
1944 
1945 	p_ptt = qed_ptt_acquire(p_hwfn);
1946 	if (!p_ptt)
1947 		return -EAGAIN;
1948 
1949 	p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1950 	if (!p_ll2_conn) {
1951 		rc = -EINVAL;
1952 		goto out;
1953 	}
1954 
1955 	/* Stop Tx & Rx of connection, if needed */
1956 	if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
1957 		p_ll2_conn->tx_queue.b_cb_registered = false;
1958 		smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */
1959 		rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn);
1960 		if (rc)
1961 			goto out;
1962 
1963 		qed_ll2_txq_flush(p_hwfn, connection_handle);
1964 		qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index);
1965 	}
1966 
1967 	if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
1968 		p_ll2_conn->rx_queue.b_cb_registered = false;
1969 		smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */
1970 		rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn);
1971 		if (rc)
1972 			goto out;
1973 
1974 		qed_ll2_rxq_flush(p_hwfn, connection_handle);
1975 		qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index);
1976 	}
1977 
1978 	if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
1979 		qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1980 
1981 	if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1982 		if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
1983 			qed_llh_remove_protocol_filter(p_hwfn, p_ptt,
1984 						       ETH_P_FCOE, 0,
1985 						      QED_LLH_FILTER_ETHERTYPE);
1986 		qed_llh_remove_protocol_filter(p_hwfn, p_ptt,
1987 					       ETH_P_FIP, 0,
1988 					       QED_LLH_FILTER_ETHERTYPE);
1989 	}
1990 
1991 out:
1992 	qed_ptt_release(p_hwfn, p_ptt);
1993 	return rc;
1994 }
1995 
1996 static void qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn,
1997 					   struct qed_ll2_info *p_ll2_conn)
1998 {
1999 	struct qed_ooo_buffer *p_buffer;
2000 
2001 	if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
2002 		return;
2003 
2004 	qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
2005 	while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
2006 						   p_hwfn->p_ooo_info))) {
2007 		dma_free_coherent(&p_hwfn->cdev->pdev->dev,
2008 				  p_buffer->rx_buffer_size,
2009 				  p_buffer->rx_buffer_virt_addr,
2010 				  p_buffer->rx_buffer_phys_addr);
2011 		kfree(p_buffer);
2012 	}
2013 }
2014 
2015 void qed_ll2_release_connection(void *cxt, u8 connection_handle)
2016 {
2017 	struct qed_hwfn *p_hwfn = cxt;
2018 	struct qed_ll2_info *p_ll2_conn = NULL;
2019 
2020 	p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
2021 	if (!p_ll2_conn)
2022 		return;
2023 
2024 	kfree(p_ll2_conn->tx_queue.descq_mem);
2025 	qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain);
2026 
2027 	kfree(p_ll2_conn->rx_queue.descq_array);
2028 	qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain);
2029 	qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain);
2030 
2031 	qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid);
2032 
2033 	qed_ll2_release_connection_ooo(p_hwfn, p_ll2_conn);
2034 
2035 	mutex_lock(&p_ll2_conn->mutex);
2036 	p_ll2_conn->b_active = false;
2037 	mutex_unlock(&p_ll2_conn->mutex);
2038 }
2039 
2040 int qed_ll2_alloc(struct qed_hwfn *p_hwfn)
2041 {
2042 	struct qed_ll2_info *p_ll2_connections;
2043 	u8 i;
2044 
2045 	/* Allocate LL2's set struct */
2046 	p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS,
2047 				    sizeof(struct qed_ll2_info), GFP_KERNEL);
2048 	if (!p_ll2_connections) {
2049 		DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n");
2050 		return -ENOMEM;
2051 	}
2052 
2053 	for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2054 		p_ll2_connections[i].my_id = i;
2055 
2056 	p_hwfn->p_ll2_info = p_ll2_connections;
2057 	return 0;
2058 }
2059 
2060 void qed_ll2_setup(struct qed_hwfn *p_hwfn)
2061 {
2062 	int i;
2063 
2064 	for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2065 		mutex_init(&p_hwfn->p_ll2_info[i].mutex);
2066 }
2067 
2068 void qed_ll2_free(struct qed_hwfn *p_hwfn)
2069 {
2070 	if (!p_hwfn->p_ll2_info)
2071 		return;
2072 
2073 	kfree(p_hwfn->p_ll2_info);
2074 	p_hwfn->p_ll2_info = NULL;
2075 }
2076 
2077 static void _qed_ll2_get_port_stats(struct qed_hwfn *p_hwfn,
2078 				    struct qed_ptt *p_ptt,
2079 				    struct qed_ll2_stats *p_stats)
2080 {
2081 	struct core_ll2_port_stats port_stats;
2082 
2083 	memset(&port_stats, 0, sizeof(port_stats));
2084 	qed_memcpy_from(p_hwfn, p_ptt, &port_stats,
2085 			BAR0_MAP_REG_TSDM_RAM +
2086 			TSTORM_LL2_PORT_STAT_OFFSET(MFW_PORT(p_hwfn)),
2087 			sizeof(port_stats));
2088 
2089 	p_stats->gsi_invalid_hdr = HILO_64_REGPAIR(port_stats.gsi_invalid_hdr);
2090 	p_stats->gsi_invalid_pkt_length =
2091 	    HILO_64_REGPAIR(port_stats.gsi_invalid_pkt_length);
2092 	p_stats->gsi_unsupported_pkt_typ =
2093 	    HILO_64_REGPAIR(port_stats.gsi_unsupported_pkt_typ);
2094 	p_stats->gsi_crcchksm_error =
2095 	    HILO_64_REGPAIR(port_stats.gsi_crcchksm_error);
2096 }
2097 
2098 static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn,
2099 				struct qed_ptt *p_ptt,
2100 				struct qed_ll2_info *p_ll2_conn,
2101 				struct qed_ll2_stats *p_stats)
2102 {
2103 	struct core_ll2_tstorm_per_queue_stat tstats;
2104 	u8 qid = p_ll2_conn->queue_id;
2105 	u32 tstats_addr;
2106 
2107 	memset(&tstats, 0, sizeof(tstats));
2108 	tstats_addr = BAR0_MAP_REG_TSDM_RAM +
2109 		      CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid);
2110 	qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
2111 
2112 	p_stats->packet_too_big_discard =
2113 			HILO_64_REGPAIR(tstats.packet_too_big_discard);
2114 	p_stats->no_buff_discard = HILO_64_REGPAIR(tstats.no_buff_discard);
2115 }
2116 
2117 static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn,
2118 				struct qed_ptt *p_ptt,
2119 				struct qed_ll2_info *p_ll2_conn,
2120 				struct qed_ll2_stats *p_stats)
2121 {
2122 	struct core_ll2_ustorm_per_queue_stat ustats;
2123 	u8 qid = p_ll2_conn->queue_id;
2124 	u32 ustats_addr;
2125 
2126 	memset(&ustats, 0, sizeof(ustats));
2127 	ustats_addr = BAR0_MAP_REG_USDM_RAM +
2128 		      CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid);
2129 	qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
2130 
2131 	p_stats->rcv_ucast_bytes = HILO_64_REGPAIR(ustats.rcv_ucast_bytes);
2132 	p_stats->rcv_mcast_bytes = HILO_64_REGPAIR(ustats.rcv_mcast_bytes);
2133 	p_stats->rcv_bcast_bytes = HILO_64_REGPAIR(ustats.rcv_bcast_bytes);
2134 	p_stats->rcv_ucast_pkts = HILO_64_REGPAIR(ustats.rcv_ucast_pkts);
2135 	p_stats->rcv_mcast_pkts = HILO_64_REGPAIR(ustats.rcv_mcast_pkts);
2136 	p_stats->rcv_bcast_pkts = HILO_64_REGPAIR(ustats.rcv_bcast_pkts);
2137 }
2138 
2139 static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn,
2140 				struct qed_ptt *p_ptt,
2141 				struct qed_ll2_info *p_ll2_conn,
2142 				struct qed_ll2_stats *p_stats)
2143 {
2144 	struct core_ll2_pstorm_per_queue_stat pstats;
2145 	u8 stats_id = p_ll2_conn->tx_stats_id;
2146 	u32 pstats_addr;
2147 
2148 	memset(&pstats, 0, sizeof(pstats));
2149 	pstats_addr = BAR0_MAP_REG_PSDM_RAM +
2150 		      CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id);
2151 	qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
2152 
2153 	p_stats->sent_ucast_bytes = HILO_64_REGPAIR(pstats.sent_ucast_bytes);
2154 	p_stats->sent_mcast_bytes = HILO_64_REGPAIR(pstats.sent_mcast_bytes);
2155 	p_stats->sent_bcast_bytes = HILO_64_REGPAIR(pstats.sent_bcast_bytes);
2156 	p_stats->sent_ucast_pkts = HILO_64_REGPAIR(pstats.sent_ucast_pkts);
2157 	p_stats->sent_mcast_pkts = HILO_64_REGPAIR(pstats.sent_mcast_pkts);
2158 	p_stats->sent_bcast_pkts = HILO_64_REGPAIR(pstats.sent_bcast_pkts);
2159 }
2160 
2161 int qed_ll2_get_stats(void *cxt,
2162 		      u8 connection_handle, struct qed_ll2_stats *p_stats)
2163 {
2164 	struct qed_hwfn *p_hwfn = cxt;
2165 	struct qed_ll2_info *p_ll2_conn = NULL;
2166 	struct qed_ptt *p_ptt;
2167 
2168 	memset(p_stats, 0, sizeof(*p_stats));
2169 
2170 	if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) ||
2171 	    !p_hwfn->p_ll2_info)
2172 		return -EINVAL;
2173 
2174 	p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
2175 
2176 	p_ptt = qed_ptt_acquire(p_hwfn);
2177 	if (!p_ptt) {
2178 		DP_ERR(p_hwfn, "Failed to acquire ptt\n");
2179 		return -EINVAL;
2180 	}
2181 
2182 	if (p_ll2_conn->input.gsi_enable)
2183 		_qed_ll2_get_port_stats(p_hwfn, p_ptt, p_stats);
2184 	_qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2185 	_qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2186 	if (p_ll2_conn->tx_stats_en)
2187 		_qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2188 
2189 	qed_ptt_release(p_hwfn, p_ptt);
2190 	return 0;
2191 }
2192 
2193 static void qed_ll2b_release_rx_packet(void *cxt,
2194 				       u8 connection_handle,
2195 				       void *cookie,
2196 				       dma_addr_t rx_buf_addr,
2197 				       bool b_last_packet)
2198 {
2199 	struct qed_hwfn *p_hwfn = cxt;
2200 
2201 	qed_ll2_dealloc_buffer(p_hwfn->cdev, cookie);
2202 }
2203 
2204 static void qed_ll2_register_cb_ops(struct qed_dev *cdev,
2205 				    const struct qed_ll2_cb_ops *ops,
2206 				    void *cookie)
2207 {
2208 	cdev->ll2->cbs = ops;
2209 	cdev->ll2->cb_cookie = cookie;
2210 }
2211 
2212 struct qed_ll2_cbs ll2_cbs = {
2213 	.rx_comp_cb = &qed_ll2b_complete_rx_packet,
2214 	.rx_release_cb = &qed_ll2b_release_rx_packet,
2215 	.tx_comp_cb = &qed_ll2b_complete_tx_packet,
2216 	.tx_release_cb = &qed_ll2b_complete_tx_packet,
2217 };
2218 
2219 static void qed_ll2_set_conn_data(struct qed_dev *cdev,
2220 				  struct qed_ll2_acquire_data *data,
2221 				  struct qed_ll2_params *params,
2222 				  enum qed_ll2_conn_type conn_type,
2223 				  u8 *handle, bool lb)
2224 {
2225 	memset(data, 0, sizeof(*data));
2226 
2227 	data->input.conn_type = conn_type;
2228 	data->input.mtu = params->mtu;
2229 	data->input.rx_num_desc = QED_LL2_RX_SIZE;
2230 	data->input.rx_drop_ttl0_flg = params->drop_ttl0_packets;
2231 	data->input.rx_vlan_removal_en = params->rx_vlan_stripping;
2232 	data->input.tx_num_desc = QED_LL2_TX_SIZE;
2233 	data->p_connection_handle = handle;
2234 	data->cbs = &ll2_cbs;
2235 	ll2_cbs.cookie = QED_LEADING_HWFN(cdev);
2236 
2237 	if (lb) {
2238 		data->input.tx_tc = PKT_LB_TC;
2239 		data->input.tx_dest = QED_LL2_TX_DEST_LB;
2240 	} else {
2241 		data->input.tx_tc = 0;
2242 		data->input.tx_dest = QED_LL2_TX_DEST_NW;
2243 	}
2244 }
2245 
2246 static int qed_ll2_start_ooo(struct qed_dev *cdev,
2247 			     struct qed_ll2_params *params)
2248 {
2249 	struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
2250 	u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
2251 	struct qed_ll2_acquire_data data;
2252 	int rc;
2253 
2254 	qed_ll2_set_conn_data(cdev, &data, params,
2255 			      QED_LL2_TYPE_OOO, handle, true);
2256 
2257 	rc = qed_ll2_acquire_connection(hwfn, &data);
2258 	if (rc) {
2259 		DP_INFO(cdev, "Failed to acquire LL2 OOO connection\n");
2260 		goto out;
2261 	}
2262 
2263 	rc = qed_ll2_establish_connection(hwfn, *handle);
2264 	if (rc) {
2265 		DP_INFO(cdev, "Failed to establist LL2 OOO connection\n");
2266 		goto fail;
2267 	}
2268 
2269 	return 0;
2270 
2271 fail:
2272 	qed_ll2_release_connection(hwfn, *handle);
2273 out:
2274 	*handle = QED_LL2_UNUSED_HANDLE;
2275 	return rc;
2276 }
2277 
2278 static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params)
2279 {
2280 	struct qed_ll2_buffer *buffer, *tmp_buffer;
2281 	enum qed_ll2_conn_type conn_type;
2282 	struct qed_ll2_acquire_data data;
2283 	struct qed_ptt *p_ptt;
2284 	int rc, i;
2285 
2286 
2287 	/* Initialize LL2 locks & lists */
2288 	INIT_LIST_HEAD(&cdev->ll2->list);
2289 	spin_lock_init(&cdev->ll2->lock);
2290 	cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN +
2291 			     L1_CACHE_BYTES + params->mtu;
2292 
2293 	/*Allocate memory for LL2 */
2294 	DP_INFO(cdev, "Allocating LL2 buffers of size %08x bytes\n",
2295 		cdev->ll2->rx_size);
2296 	for (i = 0; i < QED_LL2_RX_SIZE; i++) {
2297 		buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
2298 		if (!buffer) {
2299 			DP_INFO(cdev, "Failed to allocate LL2 buffers\n");
2300 			goto fail;
2301 		}
2302 
2303 		rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data,
2304 					  &buffer->phys_addr);
2305 		if (rc) {
2306 			kfree(buffer);
2307 			goto fail;
2308 		}
2309 
2310 		list_add_tail(&buffer->list, &cdev->ll2->list);
2311 	}
2312 
2313 	switch (QED_LEADING_HWFN(cdev)->hw_info.personality) {
2314 	case QED_PCI_FCOE:
2315 		conn_type = QED_LL2_TYPE_FCOE;
2316 		break;
2317 	case QED_PCI_ISCSI:
2318 		conn_type = QED_LL2_TYPE_ISCSI;
2319 		break;
2320 	case QED_PCI_ETH_ROCE:
2321 		conn_type = QED_LL2_TYPE_ROCE;
2322 		break;
2323 	default:
2324 		conn_type = QED_LL2_TYPE_TEST;
2325 	}
2326 
2327 	qed_ll2_set_conn_data(cdev, &data, params, conn_type,
2328 			      &cdev->ll2->handle, false);
2329 
2330 	rc = qed_ll2_acquire_connection(QED_LEADING_HWFN(cdev), &data);
2331 	if (rc) {
2332 		DP_INFO(cdev, "Failed to acquire LL2 connection\n");
2333 		goto fail;
2334 	}
2335 
2336 	rc = qed_ll2_establish_connection(QED_LEADING_HWFN(cdev),
2337 					  cdev->ll2->handle);
2338 	if (rc) {
2339 		DP_INFO(cdev, "Failed to establish LL2 connection\n");
2340 		goto release_fail;
2341 	}
2342 
2343 	/* Post all Rx buffers to FW */
2344 	spin_lock_bh(&cdev->ll2->lock);
2345 	list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) {
2346 		rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev),
2347 					    cdev->ll2->handle,
2348 					    buffer->phys_addr, 0, buffer, 1);
2349 		if (rc) {
2350 			DP_INFO(cdev,
2351 				"Failed to post an Rx buffer; Deleting it\n");
2352 			dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
2353 					 cdev->ll2->rx_size, DMA_FROM_DEVICE);
2354 			kfree(buffer->data);
2355 			list_del(&buffer->list);
2356 			kfree(buffer);
2357 		} else {
2358 			cdev->ll2->rx_cnt++;
2359 		}
2360 	}
2361 	spin_unlock_bh(&cdev->ll2->lock);
2362 
2363 	if (!cdev->ll2->rx_cnt) {
2364 		DP_INFO(cdev, "Failed passing even a single Rx buffer\n");
2365 		goto release_terminate;
2366 	}
2367 
2368 	if (!is_valid_ether_addr(params->ll2_mac_address)) {
2369 		DP_INFO(cdev, "Invalid Ethernet address\n");
2370 		goto release_terminate;
2371 	}
2372 
2373 	if (QED_LEADING_HWFN(cdev)->hw_info.personality == QED_PCI_ISCSI) {
2374 		DP_VERBOSE(cdev, QED_MSG_STORAGE, "Starting OOO LL2 queue\n");
2375 		rc = qed_ll2_start_ooo(cdev, params);
2376 		if (rc) {
2377 			DP_INFO(cdev,
2378 				"Failed to initialize the OOO LL2 queue\n");
2379 			goto release_terminate;
2380 		}
2381 	}
2382 
2383 	p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
2384 	if (!p_ptt) {
2385 		DP_INFO(cdev, "Failed to acquire PTT\n");
2386 		goto release_terminate;
2387 	}
2388 
2389 	rc = qed_llh_add_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
2390 				    params->ll2_mac_address);
2391 	qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
2392 	if (rc) {
2393 		DP_ERR(cdev, "Failed to allocate LLH filter\n");
2394 		goto release_terminate_all;
2395 	}
2396 
2397 	ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address);
2398 	return 0;
2399 
2400 release_terminate_all:
2401 
2402 release_terminate:
2403 	qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2404 release_fail:
2405 	qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2406 fail:
2407 	qed_ll2_kill_buffers(cdev);
2408 	cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2409 	return -EINVAL;
2410 }
2411 
2412 static int qed_ll2_stop(struct qed_dev *cdev)
2413 {
2414 	struct qed_ptt *p_ptt;
2415 	int rc;
2416 
2417 	if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE)
2418 		return 0;
2419 
2420 	p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
2421 	if (!p_ptt) {
2422 		DP_INFO(cdev, "Failed to acquire PTT\n");
2423 		goto fail;
2424 	}
2425 
2426 	qed_llh_remove_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
2427 				  cdev->ll2_mac_address);
2428 	qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
2429 	eth_zero_addr(cdev->ll2_mac_address);
2430 
2431 	if (QED_LEADING_HWFN(cdev)->hw_info.personality == QED_PCI_ISCSI)
2432 		qed_ll2_stop_ooo(cdev);
2433 
2434 	rc = qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev),
2435 					  cdev->ll2->handle);
2436 	if (rc)
2437 		DP_INFO(cdev, "Failed to terminate LL2 connection\n");
2438 
2439 	qed_ll2_kill_buffers(cdev);
2440 
2441 	qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2442 	cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2443 
2444 	return rc;
2445 fail:
2446 	return -EINVAL;
2447 }
2448 
2449 static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb,
2450 			      unsigned long xmit_flags)
2451 {
2452 	struct qed_ll2_tx_pkt_info pkt;
2453 	const skb_frag_t *frag;
2454 	int rc = -EINVAL, i;
2455 	dma_addr_t mapping;
2456 	u16 vlan = 0;
2457 	u8 flags = 0;
2458 
2459 	if (unlikely(skb->ip_summed != CHECKSUM_NONE)) {
2460 		DP_INFO(cdev, "Cannot transmit a checksummed packet\n");
2461 		return -EINVAL;
2462 	}
2463 
2464 	if (1 + skb_shinfo(skb)->nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET) {
2465 		DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n",
2466 		       1 + skb_shinfo(skb)->nr_frags);
2467 		return -EINVAL;
2468 	}
2469 
2470 	mapping = dma_map_single(&cdev->pdev->dev, skb->data,
2471 				 skb->len, DMA_TO_DEVICE);
2472 	if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2473 		DP_NOTICE(cdev, "SKB mapping failed\n");
2474 		return -EINVAL;
2475 	}
2476 
2477 	/* Request HW to calculate IP csum */
2478 	if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) &&
2479 	      ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
2480 		flags |= BIT(CORE_TX_BD_DATA_IP_CSUM_SHIFT);
2481 
2482 	if (skb_vlan_tag_present(skb)) {
2483 		vlan = skb_vlan_tag_get(skb);
2484 		flags |= BIT(CORE_TX_BD_DATA_VLAN_INSERTION_SHIFT);
2485 	}
2486 
2487 	memset(&pkt, 0, sizeof(pkt));
2488 	pkt.num_of_bds = 1 + skb_shinfo(skb)->nr_frags;
2489 	pkt.vlan = vlan;
2490 	pkt.bd_flags = flags;
2491 	pkt.tx_dest = QED_LL2_TX_DEST_NW;
2492 	pkt.first_frag = mapping;
2493 	pkt.first_frag_len = skb->len;
2494 	pkt.cookie = skb;
2495 	if (test_bit(QED_MF_UFP_SPECIFIC, &cdev->mf_bits) &&
2496 	    test_bit(QED_LL2_XMIT_FLAGS_FIP_DISCOVERY, &xmit_flags))
2497 		pkt.remove_stag = true;
2498 
2499 	rc = qed_ll2_prepare_tx_packet(&cdev->hwfns[0], cdev->ll2->handle,
2500 				       &pkt, 1);
2501 	if (rc)
2502 		goto err;
2503 
2504 	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
2505 		frag = &skb_shinfo(skb)->frags[i];
2506 
2507 		mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0,
2508 					   skb_frag_size(frag), DMA_TO_DEVICE);
2509 
2510 		if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2511 			DP_NOTICE(cdev,
2512 				  "Unable to map frag - dropping packet\n");
2513 			rc = -ENOMEM;
2514 			goto err;
2515 		}
2516 
2517 		rc = qed_ll2_set_fragment_of_tx_packet(QED_LEADING_HWFN(cdev),
2518 						       cdev->ll2->handle,
2519 						       mapping,
2520 						       skb_frag_size(frag));
2521 
2522 		/* if failed not much to do here, partial packet has been posted
2523 		 * we can't free memory, will need to wait for completion.
2524 		 */
2525 		if (rc)
2526 			goto err2;
2527 	}
2528 
2529 	return 0;
2530 
2531 err:
2532 	dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE);
2533 
2534 err2:
2535 	return rc;
2536 }
2537 
2538 static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats)
2539 {
2540 	if (!cdev->ll2)
2541 		return -EINVAL;
2542 
2543 	return qed_ll2_get_stats(QED_LEADING_HWFN(cdev),
2544 				 cdev->ll2->handle, stats);
2545 }
2546 
2547 const struct qed_ll2_ops qed_ll2_ops_pass = {
2548 	.start = &qed_ll2_start,
2549 	.stop = &qed_ll2_stop,
2550 	.start_xmit = &qed_ll2_start_xmit,
2551 	.register_cb_ops = &qed_ll2_register_cb_ops,
2552 	.get_stats = &qed_ll2_stats,
2553 };
2554 
2555 int qed_ll2_alloc_if(struct qed_dev *cdev)
2556 {
2557 	cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL);
2558 	return cdev->ll2 ? 0 : -ENOMEM;
2559 }
2560 
2561 void qed_ll2_dealloc_if(struct qed_dev *cdev)
2562 {
2563 	kfree(cdev->ll2);
2564 	cdev->ll2 = NULL;
2565 }
2566