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
qed_ll2b_complete_tx_packet(void * cxt,u8 connection_handle,void * cookie,dma_addr_t first_frag_addr,bool b_last_fragment,bool b_last_packet)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
qed_ll2_alloc_buffer(struct qed_dev * cdev,u8 ** data,dma_addr_t * phys_addr)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
qed_ll2_dealloc_buffer(struct qed_dev * cdev,struct qed_ll2_buffer * buffer)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
qed_ll2_kill_buffers(struct qed_dev * cdev)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
qed_ll2b_complete_rx_packet(void * cxt,struct qed_ll2_comp_rx_data * data)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
__qed_ll2_handle_sanity(struct qed_hwfn * p_hwfn,u8 connection_handle,bool b_lock,bool b_only_active)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
qed_ll2_handle_sanity(struct qed_hwfn * p_hwfn,u8 connection_handle)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
qed_ll2_handle_sanity_lock(struct qed_hwfn * p_hwfn,u8 connection_handle)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
qed_ll2_handle_sanity_inactive(struct qed_hwfn * p_hwfn,u8 connection_handle)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
qed_ll2_txq_flush(struct qed_hwfn * p_hwfn,u8 connection_handle)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
qed_ll2_txq_completion(struct qed_hwfn * p_hwfn,void * p_cookie)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
qed_ll2_rxq_parse_gsi(struct qed_hwfn * p_hwfn,union core_rx_cqe_union * p_cqe,struct qed_ll2_comp_rx_data * data)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
qed_ll2_rxq_parse_reg(struct qed_hwfn * p_hwfn,union core_rx_cqe_union * p_cqe,struct qed_ll2_comp_rx_data * data)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
qed_ll2_handle_slowpath(struct qed_hwfn * p_hwfn,struct qed_ll2_info * p_ll2_conn,union core_rx_cqe_union * p_cqe,unsigned long * p_lock_flags)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
qed_ll2_rxq_handle_completion(struct qed_hwfn * p_hwfn,struct qed_ll2_info * p_ll2_conn,union core_rx_cqe_union * p_cqe,unsigned long * p_lock_flags,bool b_last_cqe)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
qed_ll2_rxq_completion(struct qed_hwfn * p_hwfn,void * cookie)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
qed_ll2_rxq_flush(struct qed_hwfn * p_hwfn,u8 connection_handle)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
qed_ll2_lb_rxq_handler_slowpath(struct qed_hwfn * p_hwfn,struct core_rx_slow_path_cqe * p_cqe)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
qed_ll2_lb_rxq_handler(struct qed_hwfn * p_hwfn,struct qed_ll2_info * p_ll2_conn)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
qed_ooo_submit_tx_buffers(struct qed_hwfn * p_hwfn,struct qed_ll2_info * p_ll2_conn)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
qed_ooo_submit_rx_buffers(struct qed_hwfn * p_hwfn,struct qed_ll2_info * p_ll2_conn)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
qed_ll2_lb_rxq_completion(struct qed_hwfn * p_hwfn,void * p_cookie)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
qed_ll2_lb_txq_completion(struct qed_hwfn * p_hwfn,void * p_cookie)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
qed_ll2_stop_ooo(struct qed_dev * cdev)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
qed_sp_ll2_rx_queue_start(struct qed_hwfn * p_hwfn,struct qed_ll2_info * p_ll2_conn,u8 action_on_error)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
qed_sp_ll2_tx_queue_start(struct qed_hwfn * p_hwfn,struct qed_ll2_info * p_ll2_conn)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 return qed_spq_post(p_hwfn, p_ent, NULL);
1089 }
1090
qed_sp_ll2_rx_queue_stop(struct qed_hwfn * p_hwfn,struct qed_ll2_info * p_ll2_conn)1091 static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn,
1092 struct qed_ll2_info *p_ll2_conn)
1093 {
1094 struct core_rx_stop_ramrod_data *p_ramrod = NULL;
1095 struct qed_spq_entry *p_ent = NULL;
1096 struct qed_sp_init_data init_data;
1097 int rc = -EINVAL;
1098
1099 /* Get SPQ entry */
1100 memset(&init_data, 0, sizeof(init_data));
1101 init_data.cid = p_ll2_conn->cid;
1102 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1103 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1104
1105 rc = qed_sp_init_request(p_hwfn, &p_ent,
1106 CORE_RAMROD_RX_QUEUE_STOP,
1107 PROTOCOLID_CORE, &init_data);
1108 if (rc)
1109 return rc;
1110
1111 p_ramrod = &p_ent->ramrod.core_rx_queue_stop;
1112
1113 p_ramrod->complete_event_flg = 1;
1114 p_ramrod->queue_id = p_ll2_conn->queue_id;
1115
1116 return qed_spq_post(p_hwfn, p_ent, NULL);
1117 }
1118
qed_sp_ll2_tx_queue_stop(struct qed_hwfn * p_hwfn,struct qed_ll2_info * p_ll2_conn)1119 static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn,
1120 struct qed_ll2_info *p_ll2_conn)
1121 {
1122 struct qed_spq_entry *p_ent = NULL;
1123 struct qed_sp_init_data init_data;
1124 int rc = -EINVAL;
1125
1126 /* Get SPQ entry */
1127 memset(&init_data, 0, sizeof(init_data));
1128 init_data.cid = p_ll2_conn->cid;
1129 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1130 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1131
1132 rc = qed_sp_init_request(p_hwfn, &p_ent,
1133 CORE_RAMROD_TX_QUEUE_STOP,
1134 PROTOCOLID_CORE, &init_data);
1135 if (rc)
1136 return rc;
1137
1138 return qed_spq_post(p_hwfn, p_ent, NULL);
1139 }
1140
1141 static int
qed_ll2_acquire_connection_rx(struct qed_hwfn * p_hwfn,struct qed_ll2_info * p_ll2_info)1142 qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
1143 struct qed_ll2_info *p_ll2_info)
1144 {
1145 struct qed_ll2_rx_packet *p_descq;
1146 u32 capacity;
1147 int rc = 0;
1148
1149 if (!p_ll2_info->input.rx_num_desc)
1150 goto out;
1151
1152 rc = qed_chain_alloc(p_hwfn->cdev,
1153 QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1154 QED_CHAIN_MODE_NEXT_PTR,
1155 QED_CHAIN_CNT_TYPE_U16,
1156 p_ll2_info->input.rx_num_desc,
1157 sizeof(struct core_rx_bd),
1158 &p_ll2_info->rx_queue.rxq_chain, NULL);
1159 if (rc) {
1160 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n");
1161 goto out;
1162 }
1163
1164 capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain);
1165 p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet),
1166 GFP_KERNEL);
1167 if (!p_descq) {
1168 rc = -ENOMEM;
1169 DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n");
1170 goto out;
1171 }
1172 p_ll2_info->rx_queue.descq_array = p_descq;
1173
1174 rc = qed_chain_alloc(p_hwfn->cdev,
1175 QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1176 QED_CHAIN_MODE_PBL,
1177 QED_CHAIN_CNT_TYPE_U16,
1178 p_ll2_info->input.rx_num_desc,
1179 sizeof(struct core_rx_fast_path_cqe),
1180 &p_ll2_info->rx_queue.rcq_chain, NULL);
1181 if (rc) {
1182 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n");
1183 goto out;
1184 }
1185
1186 DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1187 "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n",
1188 p_ll2_info->input.conn_type, p_ll2_info->input.rx_num_desc);
1189
1190 out:
1191 return rc;
1192 }
1193
qed_ll2_acquire_connection_tx(struct qed_hwfn * p_hwfn,struct qed_ll2_info * p_ll2_info)1194 static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
1195 struct qed_ll2_info *p_ll2_info)
1196 {
1197 struct qed_ll2_tx_packet *p_descq;
1198 u32 desc_size;
1199 u32 capacity;
1200 int rc = 0;
1201
1202 if (!p_ll2_info->input.tx_num_desc)
1203 goto out;
1204
1205 rc = qed_chain_alloc(p_hwfn->cdev,
1206 QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1207 QED_CHAIN_MODE_PBL,
1208 QED_CHAIN_CNT_TYPE_U16,
1209 p_ll2_info->input.tx_num_desc,
1210 sizeof(struct core_tx_bd),
1211 &p_ll2_info->tx_queue.txq_chain, NULL);
1212 if (rc)
1213 goto out;
1214
1215 capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain);
1216 /* First element is part of the packet, rest are flexibly added */
1217 desc_size = (sizeof(*p_descq) +
1218 (p_ll2_info->input.tx_max_bds_per_packet - 1) *
1219 sizeof(p_descq->bds_set));
1220
1221 p_descq = kcalloc(capacity, desc_size, GFP_KERNEL);
1222 if (!p_descq) {
1223 rc = -ENOMEM;
1224 goto out;
1225 }
1226 p_ll2_info->tx_queue.descq_mem = p_descq;
1227
1228 DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1229 "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n",
1230 p_ll2_info->input.conn_type, p_ll2_info->input.tx_num_desc);
1231
1232 out:
1233 if (rc)
1234 DP_NOTICE(p_hwfn,
1235 "Can't allocate memory for Tx LL2 with 0x%08x buffers\n",
1236 p_ll2_info->input.tx_num_desc);
1237 return rc;
1238 }
1239
1240 static int
qed_ll2_acquire_connection_ooo(struct qed_hwfn * p_hwfn,struct qed_ll2_info * p_ll2_info,u16 mtu)1241 qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn,
1242 struct qed_ll2_info *p_ll2_info, u16 mtu)
1243 {
1244 struct qed_ooo_buffer *p_buf = NULL;
1245 void *p_virt;
1246 u16 buf_idx;
1247 int rc = 0;
1248
1249 if (p_ll2_info->input.conn_type != QED_LL2_TYPE_OOO)
1250 return rc;
1251
1252 /* Correct number of requested OOO buffers if needed */
1253 if (!p_ll2_info->input.rx_num_ooo_buffers) {
1254 u16 num_desc = p_ll2_info->input.rx_num_desc;
1255
1256 if (!num_desc)
1257 return -EINVAL;
1258 p_ll2_info->input.rx_num_ooo_buffers = num_desc * 2;
1259 }
1260
1261 for (buf_idx = 0; buf_idx < p_ll2_info->input.rx_num_ooo_buffers;
1262 buf_idx++) {
1263 p_buf = kzalloc(sizeof(*p_buf), GFP_KERNEL);
1264 if (!p_buf) {
1265 rc = -ENOMEM;
1266 goto out;
1267 }
1268
1269 p_buf->rx_buffer_size = mtu + 26 + ETH_CACHE_LINE_SIZE;
1270 p_buf->rx_buffer_size = (p_buf->rx_buffer_size +
1271 ETH_CACHE_LINE_SIZE - 1) &
1272 ~(ETH_CACHE_LINE_SIZE - 1);
1273 p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
1274 p_buf->rx_buffer_size,
1275 &p_buf->rx_buffer_phys_addr,
1276 GFP_KERNEL);
1277 if (!p_virt) {
1278 kfree(p_buf);
1279 rc = -ENOMEM;
1280 goto out;
1281 }
1282
1283 p_buf->rx_buffer_virt_addr = p_virt;
1284 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buf);
1285 }
1286
1287 DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1288 "Allocated [%04x] LL2 OOO buffers [each of size 0x%08x]\n",
1289 p_ll2_info->input.rx_num_ooo_buffers, p_buf->rx_buffer_size);
1290
1291 out:
1292 return rc;
1293 }
1294
1295 static int
qed_ll2_set_cbs(struct qed_ll2_info * p_ll2_info,const struct qed_ll2_cbs * cbs)1296 qed_ll2_set_cbs(struct qed_ll2_info *p_ll2_info, const struct qed_ll2_cbs *cbs)
1297 {
1298 if (!cbs || (!cbs->rx_comp_cb ||
1299 !cbs->rx_release_cb ||
1300 !cbs->tx_comp_cb || !cbs->tx_release_cb || !cbs->cookie))
1301 return -EINVAL;
1302
1303 p_ll2_info->cbs.rx_comp_cb = cbs->rx_comp_cb;
1304 p_ll2_info->cbs.rx_release_cb = cbs->rx_release_cb;
1305 p_ll2_info->cbs.tx_comp_cb = cbs->tx_comp_cb;
1306 p_ll2_info->cbs.tx_release_cb = cbs->tx_release_cb;
1307 p_ll2_info->cbs.slowpath_cb = cbs->slowpath_cb;
1308 p_ll2_info->cbs.cookie = cbs->cookie;
1309
1310 return 0;
1311 }
1312
1313 static enum core_error_handle
qed_ll2_get_error_choice(enum qed_ll2_error_handle err)1314 qed_ll2_get_error_choice(enum qed_ll2_error_handle err)
1315 {
1316 switch (err) {
1317 case QED_LL2_DROP_PACKET:
1318 return LL2_DROP_PACKET;
1319 case QED_LL2_DO_NOTHING:
1320 return LL2_DO_NOTHING;
1321 case QED_LL2_ASSERT:
1322 return LL2_ASSERT;
1323 default:
1324 return LL2_DO_NOTHING;
1325 }
1326 }
1327
qed_ll2_acquire_connection(void * cxt,struct qed_ll2_acquire_data * data)1328 int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data)
1329 {
1330 struct qed_hwfn *p_hwfn = cxt;
1331 qed_int_comp_cb_t comp_rx_cb, comp_tx_cb;
1332 struct qed_ll2_info *p_ll2_info = NULL;
1333 u8 i, *p_tx_max;
1334 int rc;
1335
1336 if (!data->p_connection_handle || !p_hwfn->p_ll2_info)
1337 return -EINVAL;
1338
1339 /* Find a free connection to be used */
1340 for (i = 0; (i < QED_MAX_NUM_OF_LL2_CONNECTIONS); i++) {
1341 mutex_lock(&p_hwfn->p_ll2_info[i].mutex);
1342 if (p_hwfn->p_ll2_info[i].b_active) {
1343 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1344 continue;
1345 }
1346
1347 p_hwfn->p_ll2_info[i].b_active = true;
1348 p_ll2_info = &p_hwfn->p_ll2_info[i];
1349 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1350 break;
1351 }
1352 if (!p_ll2_info)
1353 return -EBUSY;
1354
1355 memcpy(&p_ll2_info->input, &data->input, sizeof(p_ll2_info->input));
1356
1357 switch (data->input.tx_dest) {
1358 case QED_LL2_TX_DEST_NW:
1359 p_ll2_info->tx_dest = CORE_TX_DEST_NW;
1360 break;
1361 case QED_LL2_TX_DEST_LB:
1362 p_ll2_info->tx_dest = CORE_TX_DEST_LB;
1363 break;
1364 case QED_LL2_TX_DEST_DROP:
1365 p_ll2_info->tx_dest = CORE_TX_DEST_DROP;
1366 break;
1367 default:
1368 return -EINVAL;
1369 }
1370
1371 if (data->input.conn_type == QED_LL2_TYPE_OOO ||
1372 data->input.secondary_queue)
1373 p_ll2_info->main_func_queue = false;
1374 else
1375 p_ll2_info->main_func_queue = true;
1376
1377 /* Correct maximum number of Tx BDs */
1378 p_tx_max = &p_ll2_info->input.tx_max_bds_per_packet;
1379 if (*p_tx_max == 0)
1380 *p_tx_max = CORE_LL2_TX_MAX_BDS_PER_PACKET;
1381 else
1382 *p_tx_max = min_t(u8, *p_tx_max,
1383 CORE_LL2_TX_MAX_BDS_PER_PACKET);
1384
1385 rc = qed_ll2_set_cbs(p_ll2_info, data->cbs);
1386 if (rc) {
1387 DP_NOTICE(p_hwfn, "Invalid callback functions\n");
1388 goto q_allocate_fail;
1389 }
1390
1391 rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info);
1392 if (rc)
1393 goto q_allocate_fail;
1394
1395 rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info);
1396 if (rc)
1397 goto q_allocate_fail;
1398
1399 rc = qed_ll2_acquire_connection_ooo(p_hwfn, p_ll2_info,
1400 data->input.mtu);
1401 if (rc)
1402 goto q_allocate_fail;
1403
1404 /* Register callbacks for the Rx/Tx queues */
1405 if (data->input.conn_type == QED_LL2_TYPE_OOO) {
1406 comp_rx_cb = qed_ll2_lb_rxq_completion;
1407 comp_tx_cb = qed_ll2_lb_txq_completion;
1408 } else {
1409 comp_rx_cb = qed_ll2_rxq_completion;
1410 comp_tx_cb = qed_ll2_txq_completion;
1411 }
1412
1413 if (data->input.rx_num_desc) {
1414 qed_int_register_cb(p_hwfn, comp_rx_cb,
1415 &p_hwfn->p_ll2_info[i],
1416 &p_ll2_info->rx_queue.rx_sb_index,
1417 &p_ll2_info->rx_queue.p_fw_cons);
1418 p_ll2_info->rx_queue.b_cb_registred = true;
1419 }
1420
1421 if (data->input.tx_num_desc) {
1422 qed_int_register_cb(p_hwfn,
1423 comp_tx_cb,
1424 &p_hwfn->p_ll2_info[i],
1425 &p_ll2_info->tx_queue.tx_sb_index,
1426 &p_ll2_info->tx_queue.p_fw_cons);
1427 p_ll2_info->tx_queue.b_cb_registred = true;
1428 }
1429
1430 *data->p_connection_handle = i;
1431 return rc;
1432
1433 q_allocate_fail:
1434 qed_ll2_release_connection(p_hwfn, i);
1435 return -ENOMEM;
1436 }
1437
qed_ll2_establish_connection_rx(struct qed_hwfn * p_hwfn,struct qed_ll2_info * p_ll2_conn)1438 static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn,
1439 struct qed_ll2_info *p_ll2_conn)
1440 {
1441 enum qed_ll2_error_handle error_input;
1442 enum core_error_handle error_mode;
1443 u8 action_on_error = 0;
1444
1445 if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
1446 return 0;
1447
1448 DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0);
1449 error_input = p_ll2_conn->input.ai_err_packet_too_big;
1450 error_mode = qed_ll2_get_error_choice(error_input);
1451 SET_FIELD(action_on_error,
1452 CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, error_mode);
1453 error_input = p_ll2_conn->input.ai_err_no_buf;
1454 error_mode = qed_ll2_get_error_choice(error_input);
1455 SET_FIELD(action_on_error, CORE_RX_ACTION_ON_ERROR_NO_BUFF, error_mode);
1456
1457 return qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error);
1458 }
1459
1460 static void
qed_ll2_establish_connection_ooo(struct qed_hwfn * p_hwfn,struct qed_ll2_info * p_ll2_conn)1461 qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn,
1462 struct qed_ll2_info *p_ll2_conn)
1463 {
1464 if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
1465 return;
1466
1467 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1468 qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
1469 }
1470
qed_ll2_establish_connection(void * cxt,u8 connection_handle)1471 int qed_ll2_establish_connection(void *cxt, u8 connection_handle)
1472 {
1473 struct qed_hwfn *p_hwfn = cxt;
1474 struct qed_ll2_info *p_ll2_conn;
1475 struct qed_ll2_tx_packet *p_pkt;
1476 struct qed_ll2_rx_queue *p_rx;
1477 struct qed_ll2_tx_queue *p_tx;
1478 struct qed_ptt *p_ptt;
1479 int rc = -EINVAL;
1480 u32 i, capacity;
1481 u32 desc_size;
1482 u8 qid;
1483
1484 p_ptt = qed_ptt_acquire(p_hwfn);
1485 if (!p_ptt)
1486 return -EAGAIN;
1487
1488 p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1489 if (!p_ll2_conn) {
1490 rc = -EINVAL;
1491 goto out;
1492 }
1493
1494 p_rx = &p_ll2_conn->rx_queue;
1495 p_tx = &p_ll2_conn->tx_queue;
1496
1497 qed_chain_reset(&p_rx->rxq_chain);
1498 qed_chain_reset(&p_rx->rcq_chain);
1499 INIT_LIST_HEAD(&p_rx->active_descq);
1500 INIT_LIST_HEAD(&p_rx->free_descq);
1501 INIT_LIST_HEAD(&p_rx->posting_descq);
1502 spin_lock_init(&p_rx->lock);
1503 capacity = qed_chain_get_capacity(&p_rx->rxq_chain);
1504 for (i = 0; i < capacity; i++)
1505 list_add_tail(&p_rx->descq_array[i].list_entry,
1506 &p_rx->free_descq);
1507 *p_rx->p_fw_cons = 0;
1508
1509 qed_chain_reset(&p_tx->txq_chain);
1510 INIT_LIST_HEAD(&p_tx->active_descq);
1511 INIT_LIST_HEAD(&p_tx->free_descq);
1512 INIT_LIST_HEAD(&p_tx->sending_descq);
1513 spin_lock_init(&p_tx->lock);
1514 capacity = qed_chain_get_capacity(&p_tx->txq_chain);
1515 /* First element is part of the packet, rest are flexibly added */
1516 desc_size = (sizeof(*p_pkt) +
1517 (p_ll2_conn->input.tx_max_bds_per_packet - 1) *
1518 sizeof(p_pkt->bds_set));
1519
1520 for (i = 0; i < capacity; i++) {
1521 p_pkt = p_tx->descq_mem + desc_size * i;
1522 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
1523 }
1524 p_tx->cur_completing_bd_idx = 0;
1525 p_tx->bds_idx = 0;
1526 p_tx->b_completing_packet = false;
1527 p_tx->cur_send_packet = NULL;
1528 p_tx->cur_send_frag_num = 0;
1529 p_tx->cur_completing_frag_num = 0;
1530 *p_tx->p_fw_cons = 0;
1531
1532 rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid);
1533 if (rc)
1534 goto out;
1535
1536 qid = p_hwfn->hw_info.resc_start[QED_LL2_QUEUE] + connection_handle;
1537 p_ll2_conn->queue_id = qid;
1538 p_ll2_conn->tx_stats_id = qid;
1539 p_rx->set_prod_addr = (u8 __iomem *)p_hwfn->regview +
1540 GTT_BAR0_MAP_REG_TSDM_RAM +
1541 TSTORM_LL2_RX_PRODS_OFFSET(qid);
1542 p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells +
1543 qed_db_addr(p_ll2_conn->cid,
1544 DQ_DEMS_LEGACY);
1545
1546 rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn);
1547 if (rc)
1548 goto out;
1549
1550 rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn);
1551 if (rc)
1552 goto out;
1553
1554 if (!QED_IS_RDMA_PERSONALITY(p_hwfn))
1555 qed_wr(p_hwfn, p_ptt, PRS_REG_USE_LIGHT_L2, 1);
1556
1557 qed_ll2_establish_connection_ooo(p_hwfn, p_ll2_conn);
1558
1559 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1560 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
1561 qed_llh_add_protocol_filter(p_hwfn, p_ptt,
1562 ETH_P_FCOE, 0,
1563 QED_LLH_FILTER_ETHERTYPE);
1564 qed_llh_add_protocol_filter(p_hwfn, p_ptt,
1565 ETH_P_FIP, 0,
1566 QED_LLH_FILTER_ETHERTYPE);
1567 }
1568
1569 out:
1570 qed_ptt_release(p_hwfn, p_ptt);
1571 return rc;
1572 }
1573
qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn * p_hwfn,struct qed_ll2_rx_queue * p_rx,struct qed_ll2_rx_packet * p_curp)1574 static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn,
1575 struct qed_ll2_rx_queue *p_rx,
1576 struct qed_ll2_rx_packet *p_curp)
1577 {
1578 struct qed_ll2_rx_packet *p_posting_packet = NULL;
1579 struct core_ll2_rx_prod rx_prod = { 0, 0, 0 };
1580 bool b_notify_fw = false;
1581 u16 bd_prod, cq_prod;
1582
1583 /* This handles the flushing of already posted buffers */
1584 while (!list_empty(&p_rx->posting_descq)) {
1585 p_posting_packet = list_first_entry(&p_rx->posting_descq,
1586 struct qed_ll2_rx_packet,
1587 list_entry);
1588 list_move_tail(&p_posting_packet->list_entry,
1589 &p_rx->active_descq);
1590 b_notify_fw = true;
1591 }
1592
1593 /* This handles the supplied packet [if there is one] */
1594 if (p_curp) {
1595 list_add_tail(&p_curp->list_entry, &p_rx->active_descq);
1596 b_notify_fw = true;
1597 }
1598
1599 if (!b_notify_fw)
1600 return;
1601
1602 bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain);
1603 cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain);
1604 rx_prod.bd_prod = cpu_to_le16(bd_prod);
1605 rx_prod.cqe_prod = cpu_to_le16(cq_prod);
1606
1607 /* Make sure chain element is updated before ringing the doorbell */
1608 dma_wmb();
1609
1610 DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod));
1611 }
1612
qed_ll2_post_rx_buffer(void * cxt,u8 connection_handle,dma_addr_t addr,u16 buf_len,void * cookie,u8 notify_fw)1613 int qed_ll2_post_rx_buffer(void *cxt,
1614 u8 connection_handle,
1615 dma_addr_t addr,
1616 u16 buf_len, void *cookie, u8 notify_fw)
1617 {
1618 struct qed_hwfn *p_hwfn = cxt;
1619 struct core_rx_bd_with_buff_len *p_curb = NULL;
1620 struct qed_ll2_rx_packet *p_curp = NULL;
1621 struct qed_ll2_info *p_ll2_conn;
1622 struct qed_ll2_rx_queue *p_rx;
1623 unsigned long flags;
1624 void *p_data;
1625 int rc = 0;
1626
1627 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1628 if (!p_ll2_conn)
1629 return -EINVAL;
1630 p_rx = &p_ll2_conn->rx_queue;
1631
1632 spin_lock_irqsave(&p_rx->lock, flags);
1633 if (!list_empty(&p_rx->free_descq))
1634 p_curp = list_first_entry(&p_rx->free_descq,
1635 struct qed_ll2_rx_packet, list_entry);
1636 if (p_curp) {
1637 if (qed_chain_get_elem_left(&p_rx->rxq_chain) &&
1638 qed_chain_get_elem_left(&p_rx->rcq_chain)) {
1639 p_data = qed_chain_produce(&p_rx->rxq_chain);
1640 p_curb = (struct core_rx_bd_with_buff_len *)p_data;
1641 qed_chain_produce(&p_rx->rcq_chain);
1642 }
1643 }
1644
1645 /* If we're lacking entires, let's try to flush buffers to FW */
1646 if (!p_curp || !p_curb) {
1647 rc = -EBUSY;
1648 p_curp = NULL;
1649 goto out_notify;
1650 }
1651
1652 /* We have an Rx packet we can fill */
1653 DMA_REGPAIR_LE(p_curb->addr, addr);
1654 p_curb->buff_length = cpu_to_le16(buf_len);
1655 p_curp->rx_buf_addr = addr;
1656 p_curp->cookie = cookie;
1657 p_curp->rxq_bd = p_curb;
1658 p_curp->buf_length = buf_len;
1659 list_del(&p_curp->list_entry);
1660
1661 /* Check if we only want to enqueue this packet without informing FW */
1662 if (!notify_fw) {
1663 list_add_tail(&p_curp->list_entry, &p_rx->posting_descq);
1664 goto out;
1665 }
1666
1667 out_notify:
1668 qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp);
1669 out:
1670 spin_unlock_irqrestore(&p_rx->lock, flags);
1671 return rc;
1672 }
1673
qed_ll2_prepare_tx_packet_set(struct qed_hwfn * p_hwfn,struct qed_ll2_tx_queue * p_tx,struct qed_ll2_tx_packet * p_curp,struct qed_ll2_tx_pkt_info * pkt,u8 notify_fw)1674 static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn,
1675 struct qed_ll2_tx_queue *p_tx,
1676 struct qed_ll2_tx_packet *p_curp,
1677 struct qed_ll2_tx_pkt_info *pkt,
1678 u8 notify_fw)
1679 {
1680 list_del(&p_curp->list_entry);
1681 p_curp->cookie = pkt->cookie;
1682 p_curp->bd_used = pkt->num_of_bds;
1683 p_curp->notify_fw = notify_fw;
1684 p_tx->cur_send_packet = p_curp;
1685 p_tx->cur_send_frag_num = 0;
1686
1687 p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = pkt->first_frag;
1688 p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = pkt->first_frag_len;
1689 p_tx->cur_send_frag_num++;
1690 }
1691
1692 static void
qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn * p_hwfn,struct qed_ll2_info * p_ll2,struct qed_ll2_tx_packet * p_curp,struct qed_ll2_tx_pkt_info * pkt)1693 qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn,
1694 struct qed_ll2_info *p_ll2,
1695 struct qed_ll2_tx_packet *p_curp,
1696 struct qed_ll2_tx_pkt_info *pkt)
1697 {
1698 struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain;
1699 u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain);
1700 struct core_tx_bd *start_bd = NULL;
1701 enum core_roce_flavor_type roce_flavor;
1702 enum core_tx_dest tx_dest;
1703 u16 bd_data = 0, frag_idx;
1704
1705 roce_flavor = (pkt->qed_roce_flavor == QED_LL2_ROCE) ? CORE_ROCE
1706 : CORE_RROCE;
1707
1708 switch (pkt->tx_dest) {
1709 case QED_LL2_TX_DEST_NW:
1710 tx_dest = CORE_TX_DEST_NW;
1711 break;
1712 case QED_LL2_TX_DEST_LB:
1713 tx_dest = CORE_TX_DEST_LB;
1714 break;
1715 case QED_LL2_TX_DEST_DROP:
1716 tx_dest = CORE_TX_DEST_DROP;
1717 break;
1718 default:
1719 tx_dest = CORE_TX_DEST_LB;
1720 break;
1721 }
1722
1723 start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1724 if (QED_IS_IWARP_PERSONALITY(p_hwfn) &&
1725 p_ll2->input.conn_type == QED_LL2_TYPE_OOO) {
1726 start_bd->nw_vlan_or_lb_echo =
1727 cpu_to_le16(IWARP_LL2_IN_ORDER_TX_QUEUE);
1728 } else {
1729 start_bd->nw_vlan_or_lb_echo = cpu_to_le16(pkt->vlan);
1730 if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) &&
1731 p_ll2->input.conn_type == QED_LL2_TYPE_FCOE)
1732 pkt->remove_stag = true;
1733 }
1734
1735 SET_FIELD(start_bd->bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W,
1736 cpu_to_le16(pkt->l4_hdr_offset_w));
1737 SET_FIELD(start_bd->bitfield1, CORE_TX_BD_TX_DST, tx_dest);
1738 bd_data |= pkt->bd_flags;
1739 SET_FIELD(bd_data, CORE_TX_BD_DATA_START_BD, 0x1);
1740 SET_FIELD(bd_data, CORE_TX_BD_DATA_NBDS, pkt->num_of_bds);
1741 SET_FIELD(bd_data, CORE_TX_BD_DATA_ROCE_FLAV, roce_flavor);
1742 SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_CSUM, !!(pkt->enable_ip_cksum));
1743 SET_FIELD(bd_data, CORE_TX_BD_DATA_L4_CSUM, !!(pkt->enable_l4_cksum));
1744 SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_LEN, !!(pkt->calc_ip_len));
1745 SET_FIELD(bd_data, CORE_TX_BD_DATA_DISABLE_STAG_INSERTION,
1746 !!(pkt->remove_stag));
1747
1748 start_bd->bd_data.as_bitfield = cpu_to_le16(bd_data);
1749 DMA_REGPAIR_LE(start_bd->addr, pkt->first_frag);
1750 start_bd->nbytes = cpu_to_le16(pkt->first_frag_len);
1751
1752 DP_VERBOSE(p_hwfn,
1753 (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1754 "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",
1755 p_ll2->queue_id,
1756 p_ll2->cid,
1757 p_ll2->input.conn_type,
1758 prod_idx,
1759 pkt->first_frag_len,
1760 pkt->num_of_bds,
1761 le32_to_cpu(start_bd->addr.hi),
1762 le32_to_cpu(start_bd->addr.lo));
1763
1764 if (p_ll2->tx_queue.cur_send_frag_num == pkt->num_of_bds)
1765 return;
1766
1767 /* Need to provide the packet with additional BDs for frags */
1768 for (frag_idx = p_ll2->tx_queue.cur_send_frag_num;
1769 frag_idx < pkt->num_of_bds; frag_idx++) {
1770 struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd;
1771
1772 *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1773 (*p_bd)->bd_data.as_bitfield = 0;
1774 (*p_bd)->bitfield1 = 0;
1775 p_curp->bds_set[frag_idx].tx_frag = 0;
1776 p_curp->bds_set[frag_idx].frag_len = 0;
1777 }
1778 }
1779
1780 /* This should be called while the Txq spinlock is being held */
qed_ll2_tx_packet_notify(struct qed_hwfn * p_hwfn,struct qed_ll2_info * p_ll2_conn)1781 static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn,
1782 struct qed_ll2_info *p_ll2_conn)
1783 {
1784 bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw;
1785 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1786 struct qed_ll2_tx_packet *p_pkt = NULL;
1787 struct core_db_data db_msg = { 0, 0, 0 };
1788 u16 bd_prod;
1789
1790 /* If there are missing BDs, don't do anything now */
1791 if (p_ll2_conn->tx_queue.cur_send_frag_num !=
1792 p_ll2_conn->tx_queue.cur_send_packet->bd_used)
1793 return;
1794
1795 /* Push the current packet to the list and clean after it */
1796 list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry,
1797 &p_ll2_conn->tx_queue.sending_descq);
1798 p_ll2_conn->tx_queue.cur_send_packet = NULL;
1799 p_ll2_conn->tx_queue.cur_send_frag_num = 0;
1800
1801 /* Notify FW of packet only if requested to */
1802 if (!b_notify)
1803 return;
1804
1805 bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain);
1806
1807 while (!list_empty(&p_tx->sending_descq)) {
1808 p_pkt = list_first_entry(&p_tx->sending_descq,
1809 struct qed_ll2_tx_packet, list_entry);
1810 if (!p_pkt)
1811 break;
1812
1813 list_move_tail(&p_pkt->list_entry, &p_tx->active_descq);
1814 }
1815
1816 SET_FIELD(db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
1817 SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET);
1818 SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_VAL_SEL,
1819 DQ_XCM_CORE_TX_BD_PROD_CMD);
1820 db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
1821 db_msg.spq_prod = cpu_to_le16(bd_prod);
1822
1823 /* Make sure the BDs data is updated before ringing the doorbell */
1824 wmb();
1825
1826 DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&db_msg));
1827
1828 DP_VERBOSE(p_hwfn,
1829 (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1830 "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n",
1831 p_ll2_conn->queue_id,
1832 p_ll2_conn->cid,
1833 p_ll2_conn->input.conn_type, db_msg.spq_prod);
1834 }
1835
qed_ll2_prepare_tx_packet(void * cxt,u8 connection_handle,struct qed_ll2_tx_pkt_info * pkt,bool notify_fw)1836 int qed_ll2_prepare_tx_packet(void *cxt,
1837 u8 connection_handle,
1838 struct qed_ll2_tx_pkt_info *pkt,
1839 bool notify_fw)
1840 {
1841 struct qed_hwfn *p_hwfn = cxt;
1842 struct qed_ll2_tx_packet *p_curp = NULL;
1843 struct qed_ll2_info *p_ll2_conn = NULL;
1844 struct qed_ll2_tx_queue *p_tx;
1845 struct qed_chain *p_tx_chain;
1846 unsigned long flags;
1847 int rc = 0;
1848
1849 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1850 if (!p_ll2_conn)
1851 return -EINVAL;
1852 p_tx = &p_ll2_conn->tx_queue;
1853 p_tx_chain = &p_tx->txq_chain;
1854
1855 if (pkt->num_of_bds > p_ll2_conn->input.tx_max_bds_per_packet)
1856 return -EIO;
1857
1858 spin_lock_irqsave(&p_tx->lock, flags);
1859 if (p_tx->cur_send_packet) {
1860 rc = -EEXIST;
1861 goto out;
1862 }
1863
1864 /* Get entry, but only if we have tx elements for it */
1865 if (!list_empty(&p_tx->free_descq))
1866 p_curp = list_first_entry(&p_tx->free_descq,
1867 struct qed_ll2_tx_packet, list_entry);
1868 if (p_curp && qed_chain_get_elem_left(p_tx_chain) < pkt->num_of_bds)
1869 p_curp = NULL;
1870
1871 if (!p_curp) {
1872 rc = -EBUSY;
1873 goto out;
1874 }
1875
1876 /* Prepare packet and BD, and perhaps send a doorbell to FW */
1877 qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp, pkt, notify_fw);
1878
1879 qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp, pkt);
1880
1881 qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1882
1883 out:
1884 spin_unlock_irqrestore(&p_tx->lock, flags);
1885 return rc;
1886 }
1887
qed_ll2_set_fragment_of_tx_packet(void * cxt,u8 connection_handle,dma_addr_t addr,u16 nbytes)1888 int qed_ll2_set_fragment_of_tx_packet(void *cxt,
1889 u8 connection_handle,
1890 dma_addr_t addr, u16 nbytes)
1891 {
1892 struct qed_ll2_tx_packet *p_cur_send_packet = NULL;
1893 struct qed_hwfn *p_hwfn = cxt;
1894 struct qed_ll2_info *p_ll2_conn = NULL;
1895 u16 cur_send_frag_num = 0;
1896 struct core_tx_bd *p_bd;
1897 unsigned long flags;
1898
1899 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1900 if (!p_ll2_conn)
1901 return -EINVAL;
1902
1903 if (!p_ll2_conn->tx_queue.cur_send_packet)
1904 return -EINVAL;
1905
1906 p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet;
1907 cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num;
1908
1909 if (cur_send_frag_num >= p_cur_send_packet->bd_used)
1910 return -EINVAL;
1911
1912 /* Fill the BD information, and possibly notify FW */
1913 p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd;
1914 DMA_REGPAIR_LE(p_bd->addr, addr);
1915 p_bd->nbytes = cpu_to_le16(nbytes);
1916 p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr;
1917 p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes;
1918
1919 p_ll2_conn->tx_queue.cur_send_frag_num++;
1920
1921 spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags);
1922 qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1923 spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags);
1924
1925 return 0;
1926 }
1927
qed_ll2_terminate_connection(void * cxt,u8 connection_handle)1928 int qed_ll2_terminate_connection(void *cxt, u8 connection_handle)
1929 {
1930 struct qed_hwfn *p_hwfn = cxt;
1931 struct qed_ll2_info *p_ll2_conn = NULL;
1932 int rc = -EINVAL;
1933 struct qed_ptt *p_ptt;
1934
1935 p_ptt = qed_ptt_acquire(p_hwfn);
1936 if (!p_ptt)
1937 return -EAGAIN;
1938
1939 p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1940 if (!p_ll2_conn) {
1941 rc = -EINVAL;
1942 goto out;
1943 }
1944
1945 /* Stop Tx & Rx of connection, if needed */
1946 if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
1947 p_ll2_conn->tx_queue.b_cb_registred = false;
1948 smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */
1949 rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn);
1950 if (rc)
1951 goto out;
1952
1953 qed_ll2_txq_flush(p_hwfn, connection_handle);
1954 qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index);
1955 }
1956
1957 if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
1958 p_ll2_conn->rx_queue.b_cb_registred = false;
1959 smp_wmb(); /* Make sure this is seen by ll2_lb_rxq_completion */
1960 rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn);
1961 if (rc)
1962 goto out;
1963
1964 qed_ll2_rxq_flush(p_hwfn, connection_handle);
1965 qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index);
1966 }
1967
1968 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
1969 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1970
1971 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1972 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
1973 qed_llh_remove_protocol_filter(p_hwfn, p_ptt,
1974 ETH_P_FCOE, 0,
1975 QED_LLH_FILTER_ETHERTYPE);
1976 qed_llh_remove_protocol_filter(p_hwfn, p_ptt,
1977 ETH_P_FIP, 0,
1978 QED_LLH_FILTER_ETHERTYPE);
1979 }
1980
1981 out:
1982 qed_ptt_release(p_hwfn, p_ptt);
1983 return rc;
1984 }
1985
qed_ll2_release_connection_ooo(struct qed_hwfn * p_hwfn,struct qed_ll2_info * p_ll2_conn)1986 static void qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn,
1987 struct qed_ll2_info *p_ll2_conn)
1988 {
1989 struct qed_ooo_buffer *p_buffer;
1990
1991 if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
1992 return;
1993
1994 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1995 while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
1996 p_hwfn->p_ooo_info))) {
1997 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
1998 p_buffer->rx_buffer_size,
1999 p_buffer->rx_buffer_virt_addr,
2000 p_buffer->rx_buffer_phys_addr);
2001 kfree(p_buffer);
2002 }
2003 }
2004
qed_ll2_release_connection(void * cxt,u8 connection_handle)2005 void qed_ll2_release_connection(void *cxt, u8 connection_handle)
2006 {
2007 struct qed_hwfn *p_hwfn = cxt;
2008 struct qed_ll2_info *p_ll2_conn = NULL;
2009
2010 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
2011 if (!p_ll2_conn)
2012 return;
2013
2014 kfree(p_ll2_conn->tx_queue.descq_mem);
2015 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain);
2016
2017 kfree(p_ll2_conn->rx_queue.descq_array);
2018 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain);
2019 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain);
2020
2021 qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid);
2022
2023 qed_ll2_release_connection_ooo(p_hwfn, p_ll2_conn);
2024
2025 mutex_lock(&p_ll2_conn->mutex);
2026 p_ll2_conn->b_active = false;
2027 mutex_unlock(&p_ll2_conn->mutex);
2028 }
2029
qed_ll2_alloc(struct qed_hwfn * p_hwfn)2030 int qed_ll2_alloc(struct qed_hwfn *p_hwfn)
2031 {
2032 struct qed_ll2_info *p_ll2_connections;
2033 u8 i;
2034
2035 /* Allocate LL2's set struct */
2036 p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS,
2037 sizeof(struct qed_ll2_info), GFP_KERNEL);
2038 if (!p_ll2_connections) {
2039 DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n");
2040 return -ENOMEM;
2041 }
2042
2043 for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2044 p_ll2_connections[i].my_id = i;
2045
2046 p_hwfn->p_ll2_info = p_ll2_connections;
2047 return 0;
2048 }
2049
qed_ll2_setup(struct qed_hwfn * p_hwfn)2050 void qed_ll2_setup(struct qed_hwfn *p_hwfn)
2051 {
2052 int i;
2053
2054 for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2055 mutex_init(&p_hwfn->p_ll2_info[i].mutex);
2056 }
2057
qed_ll2_free(struct qed_hwfn * p_hwfn)2058 void qed_ll2_free(struct qed_hwfn *p_hwfn)
2059 {
2060 if (!p_hwfn->p_ll2_info)
2061 return;
2062
2063 kfree(p_hwfn->p_ll2_info);
2064 p_hwfn->p_ll2_info = NULL;
2065 }
2066
_qed_ll2_get_port_stats(struct qed_hwfn * p_hwfn,struct qed_ptt * p_ptt,struct qed_ll2_stats * p_stats)2067 static void _qed_ll2_get_port_stats(struct qed_hwfn *p_hwfn,
2068 struct qed_ptt *p_ptt,
2069 struct qed_ll2_stats *p_stats)
2070 {
2071 struct core_ll2_port_stats port_stats;
2072
2073 memset(&port_stats, 0, sizeof(port_stats));
2074 qed_memcpy_from(p_hwfn, p_ptt, &port_stats,
2075 BAR0_MAP_REG_TSDM_RAM +
2076 TSTORM_LL2_PORT_STAT_OFFSET(MFW_PORT(p_hwfn)),
2077 sizeof(port_stats));
2078
2079 p_stats->gsi_invalid_hdr = HILO_64_REGPAIR(port_stats.gsi_invalid_hdr);
2080 p_stats->gsi_invalid_pkt_length =
2081 HILO_64_REGPAIR(port_stats.gsi_invalid_pkt_length);
2082 p_stats->gsi_unsupported_pkt_typ =
2083 HILO_64_REGPAIR(port_stats.gsi_unsupported_pkt_typ);
2084 p_stats->gsi_crcchksm_error =
2085 HILO_64_REGPAIR(port_stats.gsi_crcchksm_error);
2086 }
2087
_qed_ll2_get_tstats(struct qed_hwfn * p_hwfn,struct qed_ptt * p_ptt,struct qed_ll2_info * p_ll2_conn,struct qed_ll2_stats * p_stats)2088 static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn,
2089 struct qed_ptt *p_ptt,
2090 struct qed_ll2_info *p_ll2_conn,
2091 struct qed_ll2_stats *p_stats)
2092 {
2093 struct core_ll2_tstorm_per_queue_stat tstats;
2094 u8 qid = p_ll2_conn->queue_id;
2095 u32 tstats_addr;
2096
2097 memset(&tstats, 0, sizeof(tstats));
2098 tstats_addr = BAR0_MAP_REG_TSDM_RAM +
2099 CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid);
2100 qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
2101
2102 p_stats->packet_too_big_discard =
2103 HILO_64_REGPAIR(tstats.packet_too_big_discard);
2104 p_stats->no_buff_discard = HILO_64_REGPAIR(tstats.no_buff_discard);
2105 }
2106
_qed_ll2_get_ustats(struct qed_hwfn * p_hwfn,struct qed_ptt * p_ptt,struct qed_ll2_info * p_ll2_conn,struct qed_ll2_stats * p_stats)2107 static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn,
2108 struct qed_ptt *p_ptt,
2109 struct qed_ll2_info *p_ll2_conn,
2110 struct qed_ll2_stats *p_stats)
2111 {
2112 struct core_ll2_ustorm_per_queue_stat ustats;
2113 u8 qid = p_ll2_conn->queue_id;
2114 u32 ustats_addr;
2115
2116 memset(&ustats, 0, sizeof(ustats));
2117 ustats_addr = BAR0_MAP_REG_USDM_RAM +
2118 CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid);
2119 qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
2120
2121 p_stats->rcv_ucast_bytes = HILO_64_REGPAIR(ustats.rcv_ucast_bytes);
2122 p_stats->rcv_mcast_bytes = HILO_64_REGPAIR(ustats.rcv_mcast_bytes);
2123 p_stats->rcv_bcast_bytes = HILO_64_REGPAIR(ustats.rcv_bcast_bytes);
2124 p_stats->rcv_ucast_pkts = HILO_64_REGPAIR(ustats.rcv_ucast_pkts);
2125 p_stats->rcv_mcast_pkts = HILO_64_REGPAIR(ustats.rcv_mcast_pkts);
2126 p_stats->rcv_bcast_pkts = HILO_64_REGPAIR(ustats.rcv_bcast_pkts);
2127 }
2128
_qed_ll2_get_pstats(struct qed_hwfn * p_hwfn,struct qed_ptt * p_ptt,struct qed_ll2_info * p_ll2_conn,struct qed_ll2_stats * p_stats)2129 static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn,
2130 struct qed_ptt *p_ptt,
2131 struct qed_ll2_info *p_ll2_conn,
2132 struct qed_ll2_stats *p_stats)
2133 {
2134 struct core_ll2_pstorm_per_queue_stat pstats;
2135 u8 stats_id = p_ll2_conn->tx_stats_id;
2136 u32 pstats_addr;
2137
2138 memset(&pstats, 0, sizeof(pstats));
2139 pstats_addr = BAR0_MAP_REG_PSDM_RAM +
2140 CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id);
2141 qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
2142
2143 p_stats->sent_ucast_bytes = HILO_64_REGPAIR(pstats.sent_ucast_bytes);
2144 p_stats->sent_mcast_bytes = HILO_64_REGPAIR(pstats.sent_mcast_bytes);
2145 p_stats->sent_bcast_bytes = HILO_64_REGPAIR(pstats.sent_bcast_bytes);
2146 p_stats->sent_ucast_pkts = HILO_64_REGPAIR(pstats.sent_ucast_pkts);
2147 p_stats->sent_mcast_pkts = HILO_64_REGPAIR(pstats.sent_mcast_pkts);
2148 p_stats->sent_bcast_pkts = HILO_64_REGPAIR(pstats.sent_bcast_pkts);
2149 }
2150
qed_ll2_get_stats(void * cxt,u8 connection_handle,struct qed_ll2_stats * p_stats)2151 int qed_ll2_get_stats(void *cxt,
2152 u8 connection_handle, struct qed_ll2_stats *p_stats)
2153 {
2154 struct qed_hwfn *p_hwfn = cxt;
2155 struct qed_ll2_info *p_ll2_conn = NULL;
2156 struct qed_ptt *p_ptt;
2157
2158 memset(p_stats, 0, sizeof(*p_stats));
2159
2160 if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) ||
2161 !p_hwfn->p_ll2_info)
2162 return -EINVAL;
2163
2164 p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
2165
2166 p_ptt = qed_ptt_acquire(p_hwfn);
2167 if (!p_ptt) {
2168 DP_ERR(p_hwfn, "Failed to acquire ptt\n");
2169 return -EINVAL;
2170 }
2171
2172 if (p_ll2_conn->input.gsi_enable)
2173 _qed_ll2_get_port_stats(p_hwfn, p_ptt, p_stats);
2174 _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2175 _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2176 if (p_ll2_conn->tx_stats_en)
2177 _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2178
2179 qed_ptt_release(p_hwfn, p_ptt);
2180 return 0;
2181 }
2182
qed_ll2b_release_rx_packet(void * cxt,u8 connection_handle,void * cookie,dma_addr_t rx_buf_addr,bool b_last_packet)2183 static void qed_ll2b_release_rx_packet(void *cxt,
2184 u8 connection_handle,
2185 void *cookie,
2186 dma_addr_t rx_buf_addr,
2187 bool b_last_packet)
2188 {
2189 struct qed_hwfn *p_hwfn = cxt;
2190
2191 qed_ll2_dealloc_buffer(p_hwfn->cdev, cookie);
2192 }
2193
qed_ll2_register_cb_ops(struct qed_dev * cdev,const struct qed_ll2_cb_ops * ops,void * cookie)2194 static void qed_ll2_register_cb_ops(struct qed_dev *cdev,
2195 const struct qed_ll2_cb_ops *ops,
2196 void *cookie)
2197 {
2198 cdev->ll2->cbs = ops;
2199 cdev->ll2->cb_cookie = cookie;
2200 }
2201
2202 struct qed_ll2_cbs ll2_cbs = {
2203 .rx_comp_cb = &qed_ll2b_complete_rx_packet,
2204 .rx_release_cb = &qed_ll2b_release_rx_packet,
2205 .tx_comp_cb = &qed_ll2b_complete_tx_packet,
2206 .tx_release_cb = &qed_ll2b_complete_tx_packet,
2207 };
2208
qed_ll2_set_conn_data(struct qed_dev * cdev,struct qed_ll2_acquire_data * data,struct qed_ll2_params * params,enum qed_ll2_conn_type conn_type,u8 * handle,bool lb)2209 static void qed_ll2_set_conn_data(struct qed_dev *cdev,
2210 struct qed_ll2_acquire_data *data,
2211 struct qed_ll2_params *params,
2212 enum qed_ll2_conn_type conn_type,
2213 u8 *handle, bool lb)
2214 {
2215 memset(data, 0, sizeof(*data));
2216
2217 data->input.conn_type = conn_type;
2218 data->input.mtu = params->mtu;
2219 data->input.rx_num_desc = QED_LL2_RX_SIZE;
2220 data->input.rx_drop_ttl0_flg = params->drop_ttl0_packets;
2221 data->input.rx_vlan_removal_en = params->rx_vlan_stripping;
2222 data->input.tx_num_desc = QED_LL2_TX_SIZE;
2223 data->p_connection_handle = handle;
2224 data->cbs = &ll2_cbs;
2225 ll2_cbs.cookie = QED_LEADING_HWFN(cdev);
2226
2227 if (lb) {
2228 data->input.tx_tc = PKT_LB_TC;
2229 data->input.tx_dest = QED_LL2_TX_DEST_LB;
2230 } else {
2231 data->input.tx_tc = 0;
2232 data->input.tx_dest = QED_LL2_TX_DEST_NW;
2233 }
2234 }
2235
qed_ll2_start_ooo(struct qed_dev * cdev,struct qed_ll2_params * params)2236 static int qed_ll2_start_ooo(struct qed_dev *cdev,
2237 struct qed_ll2_params *params)
2238 {
2239 struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
2240 u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
2241 struct qed_ll2_acquire_data data;
2242 int rc;
2243
2244 qed_ll2_set_conn_data(cdev, &data, params,
2245 QED_LL2_TYPE_OOO, handle, true);
2246
2247 rc = qed_ll2_acquire_connection(hwfn, &data);
2248 if (rc) {
2249 DP_INFO(cdev, "Failed to acquire LL2 OOO connection\n");
2250 goto out;
2251 }
2252
2253 rc = qed_ll2_establish_connection(hwfn, *handle);
2254 if (rc) {
2255 DP_INFO(cdev, "Failed to establist LL2 OOO connection\n");
2256 goto fail;
2257 }
2258
2259 return 0;
2260
2261 fail:
2262 qed_ll2_release_connection(hwfn, *handle);
2263 out:
2264 *handle = QED_LL2_UNUSED_HANDLE;
2265 return rc;
2266 }
2267
qed_ll2_start(struct qed_dev * cdev,struct qed_ll2_params * params)2268 static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params)
2269 {
2270 struct qed_ll2_buffer *buffer, *tmp_buffer;
2271 enum qed_ll2_conn_type conn_type;
2272 struct qed_ll2_acquire_data data;
2273 struct qed_ptt *p_ptt;
2274 int rc, i;
2275
2276
2277 /* Initialize LL2 locks & lists */
2278 INIT_LIST_HEAD(&cdev->ll2->list);
2279 spin_lock_init(&cdev->ll2->lock);
2280 cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN +
2281 L1_CACHE_BYTES + params->mtu;
2282
2283 /*Allocate memory for LL2 */
2284 DP_INFO(cdev, "Allocating LL2 buffers of size %08x bytes\n",
2285 cdev->ll2->rx_size);
2286 for (i = 0; i < QED_LL2_RX_SIZE; i++) {
2287 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
2288 if (!buffer) {
2289 DP_INFO(cdev, "Failed to allocate LL2 buffers\n");
2290 goto fail;
2291 }
2292
2293 rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data,
2294 &buffer->phys_addr);
2295 if (rc) {
2296 kfree(buffer);
2297 goto fail;
2298 }
2299
2300 list_add_tail(&buffer->list, &cdev->ll2->list);
2301 }
2302
2303 switch (QED_LEADING_HWFN(cdev)->hw_info.personality) {
2304 case QED_PCI_FCOE:
2305 conn_type = QED_LL2_TYPE_FCOE;
2306 break;
2307 case QED_PCI_ISCSI:
2308 conn_type = QED_LL2_TYPE_ISCSI;
2309 break;
2310 case QED_PCI_ETH_ROCE:
2311 conn_type = QED_LL2_TYPE_ROCE;
2312 break;
2313 default:
2314 conn_type = QED_LL2_TYPE_TEST;
2315 }
2316
2317 qed_ll2_set_conn_data(cdev, &data, params, conn_type,
2318 &cdev->ll2->handle, false);
2319
2320 rc = qed_ll2_acquire_connection(QED_LEADING_HWFN(cdev), &data);
2321 if (rc) {
2322 DP_INFO(cdev, "Failed to acquire LL2 connection\n");
2323 goto fail;
2324 }
2325
2326 rc = qed_ll2_establish_connection(QED_LEADING_HWFN(cdev),
2327 cdev->ll2->handle);
2328 if (rc) {
2329 DP_INFO(cdev, "Failed to establish LL2 connection\n");
2330 goto release_fail;
2331 }
2332
2333 /* Post all Rx buffers to FW */
2334 spin_lock_bh(&cdev->ll2->lock);
2335 list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) {
2336 rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev),
2337 cdev->ll2->handle,
2338 buffer->phys_addr, 0, buffer, 1);
2339 if (rc) {
2340 DP_INFO(cdev,
2341 "Failed to post an Rx buffer; Deleting it\n");
2342 dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
2343 cdev->ll2->rx_size, DMA_FROM_DEVICE);
2344 kfree(buffer->data);
2345 list_del(&buffer->list);
2346 kfree(buffer);
2347 } else {
2348 cdev->ll2->rx_cnt++;
2349 }
2350 }
2351 spin_unlock_bh(&cdev->ll2->lock);
2352
2353 if (!cdev->ll2->rx_cnt) {
2354 DP_INFO(cdev, "Failed passing even a single Rx buffer\n");
2355 goto release_terminate;
2356 }
2357
2358 if (!is_valid_ether_addr(params->ll2_mac_address)) {
2359 DP_INFO(cdev, "Invalid Ethernet address\n");
2360 goto release_terminate;
2361 }
2362
2363 if (QED_LEADING_HWFN(cdev)->hw_info.personality == QED_PCI_ISCSI) {
2364 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Starting OOO LL2 queue\n");
2365 rc = qed_ll2_start_ooo(cdev, params);
2366 if (rc) {
2367 DP_INFO(cdev,
2368 "Failed to initialize the OOO LL2 queue\n");
2369 goto release_terminate;
2370 }
2371 }
2372
2373 p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
2374 if (!p_ptt) {
2375 DP_INFO(cdev, "Failed to acquire PTT\n");
2376 goto release_terminate;
2377 }
2378
2379 rc = qed_llh_add_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
2380 params->ll2_mac_address);
2381 qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
2382 if (rc) {
2383 DP_ERR(cdev, "Failed to allocate LLH filter\n");
2384 goto release_terminate_all;
2385 }
2386
2387 ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address);
2388 return 0;
2389
2390 release_terminate_all:
2391
2392 release_terminate:
2393 qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2394 release_fail:
2395 qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2396 fail:
2397 qed_ll2_kill_buffers(cdev);
2398 cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2399 return -EINVAL;
2400 }
2401
qed_ll2_stop(struct qed_dev * cdev)2402 static int qed_ll2_stop(struct qed_dev *cdev)
2403 {
2404 struct qed_ptt *p_ptt;
2405 int rc;
2406
2407 if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE)
2408 return 0;
2409
2410 p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
2411 if (!p_ptt) {
2412 DP_INFO(cdev, "Failed to acquire PTT\n");
2413 goto fail;
2414 }
2415
2416 qed_llh_remove_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
2417 cdev->ll2_mac_address);
2418 qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
2419 eth_zero_addr(cdev->ll2_mac_address);
2420
2421 if (QED_LEADING_HWFN(cdev)->hw_info.personality == QED_PCI_ISCSI)
2422 qed_ll2_stop_ooo(cdev);
2423
2424 rc = qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev),
2425 cdev->ll2->handle);
2426 if (rc)
2427 DP_INFO(cdev, "Failed to terminate LL2 connection\n");
2428
2429 qed_ll2_kill_buffers(cdev);
2430
2431 qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2432 cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2433
2434 return rc;
2435 fail:
2436 return -EINVAL;
2437 }
2438
qed_ll2_start_xmit(struct qed_dev * cdev,struct sk_buff * skb,unsigned long xmit_flags)2439 static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb,
2440 unsigned long xmit_flags)
2441 {
2442 struct qed_ll2_tx_pkt_info pkt;
2443 const skb_frag_t *frag;
2444 u8 flags = 0, nr_frags;
2445 int rc = -EINVAL, i;
2446 dma_addr_t mapping;
2447 u16 vlan = 0;
2448
2449 if (unlikely(skb->ip_summed != CHECKSUM_NONE)) {
2450 DP_INFO(cdev, "Cannot transmit a checksummed packet\n");
2451 return -EINVAL;
2452 }
2453
2454 /* Cache number of fragments from SKB since SKB may be freed by
2455 * the completion routine after calling qed_ll2_prepare_tx_packet()
2456 */
2457 nr_frags = skb_shinfo(skb)->nr_frags;
2458
2459 if (1 + nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET) {
2460 DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n",
2461 1 + nr_frags);
2462 return -EINVAL;
2463 }
2464
2465 mapping = dma_map_single(&cdev->pdev->dev, skb->data,
2466 skb->len, DMA_TO_DEVICE);
2467 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2468 DP_NOTICE(cdev, "SKB mapping failed\n");
2469 return -EINVAL;
2470 }
2471
2472 /* Request HW to calculate IP csum */
2473 if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) &&
2474 ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
2475 flags |= BIT(CORE_TX_BD_DATA_IP_CSUM_SHIFT);
2476
2477 if (skb_vlan_tag_present(skb)) {
2478 vlan = skb_vlan_tag_get(skb);
2479 flags |= BIT(CORE_TX_BD_DATA_VLAN_INSERTION_SHIFT);
2480 }
2481
2482 memset(&pkt, 0, sizeof(pkt));
2483 pkt.num_of_bds = 1 + nr_frags;
2484 pkt.vlan = vlan;
2485 pkt.bd_flags = flags;
2486 pkt.tx_dest = QED_LL2_TX_DEST_NW;
2487 pkt.first_frag = mapping;
2488 pkt.first_frag_len = skb->len;
2489 pkt.cookie = skb;
2490 if (test_bit(QED_MF_UFP_SPECIFIC, &cdev->mf_bits) &&
2491 test_bit(QED_LL2_XMIT_FLAGS_FIP_DISCOVERY, &xmit_flags))
2492 pkt.remove_stag = true;
2493
2494 /* qed_ll2_prepare_tx_packet() may actually send the packet if
2495 * there are no fragments in the skb and subsequently the completion
2496 * routine may run and free the SKB, so no dereferencing the SKB
2497 * beyond this point unless skb has any fragments.
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 < 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
qed_ll2_stats(struct qed_dev * cdev,struct qed_ll2_stats * stats)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
qed_ll2_alloc_if(struct qed_dev * cdev)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
qed_ll2_dealloc_if(struct qed_dev * cdev)2561 void qed_ll2_dealloc_if(struct qed_dev *cdev)
2562 {
2563 kfree(cdev->ll2);
2564 cdev->ll2 = NULL;
2565 }
2566