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staging: rtl8188eu: Replace function name in string with __func__
[linux/fpc-iii.git] / drivers / net / ethernet / qlogic / qed / qed_ll2.c
blobc4f14fdc4e77ba8f7d2ed06f3d5cfd4401fe19e3
1 /* QLogic qed NIC Driver
2 * Copyright (c) 2015-2017 QLogic Corporation
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and /or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33 #include <linux/types.h>
34 #include <asm/byteorder.h>
35 #include <linux/dma-mapping.h>
36 #include <linux/if_vlan.h>
37 #include <linux/kernel.h>
38 #include <linux/pci.h>
39 #include <linux/slab.h>
40 #include <linux/stddef.h>
41 #include <linux/workqueue.h>
42 #include <net/ipv6.h>
43 #include <linux/bitops.h>
44 #include <linux/delay.h>
45 #include <linux/errno.h>
46 #include <linux/etherdevice.h>
47 #include <linux/io.h>
48 #include <linux/list.h>
49 #include <linux/mutex.h>
50 #include <linux/spinlock.h>
51 #include <linux/string.h>
52 #include <linux/qed/qed_ll2_if.h>
53 #include "qed.h"
54 #include "qed_cxt.h"
55 #include "qed_dev_api.h"
56 #include "qed_hsi.h"
57 #include "qed_hw.h"
58 #include "qed_int.h"
59 #include "qed_ll2.h"
60 #include "qed_mcp.h"
61 #include "qed_ooo.h"
62 #include "qed_reg_addr.h"
63 #include "qed_sp.h"
64 #include "qed_rdma.h"
65
66 #define QED_LL2_RX_REGISTERED(ll2) ((ll2)->rx_queue.b_cb_registred)
67 #define QED_LL2_TX_REGISTERED(ll2) ((ll2)->tx_queue.b_cb_registred)
68
69 #define QED_LL2_TX_SIZE (256)
70 #define QED_LL2_RX_SIZE (4096)
71
72 struct qed_cb_ll2_info {
73 int rx_cnt;
74 u32 rx_size;
75 u8 handle;
76
77 /* Lock protecting LL2 buffer lists in sleepless context */
78 spinlock_t lock;
79 struct list_head list;
80
81 const struct qed_ll2_cb_ops *cbs;
82 void *cb_cookie;
83 };
84
85 struct qed_ll2_buffer {
86 struct list_head list;
87 void *data;
88 dma_addr_t phys_addr;
89 };
90
91 static void qed_ll2b_complete_tx_packet(void *cxt,
92 u8 connection_handle,
93 void *cookie,
94 dma_addr_t first_frag_addr,
95 bool b_last_fragment,
96 bool b_last_packet)
97 {
98 struct qed_hwfn *p_hwfn = cxt;
99 struct qed_dev *cdev = p_hwfn->cdev;
100 struct sk_buff *skb = cookie;
101
102 /* All we need to do is release the mapping */
103 dma_unmap_single(&p_hwfn->cdev->pdev->dev, first_frag_addr,
104 skb_headlen(skb), DMA_TO_DEVICE);
105
106 if (cdev->ll2->cbs && cdev->ll2->cbs->tx_cb)
107 cdev->ll2->cbs->tx_cb(cdev->ll2->cb_cookie, skb,
108 b_last_fragment);
109
110 dev_kfree_skb_any(skb);
111 }
112
113 static int qed_ll2_alloc_buffer(struct qed_dev *cdev,
114 u8 **data, dma_addr_t *phys_addr)
115 {
116 *data = kmalloc(cdev->ll2->rx_size, GFP_ATOMIC);
117 if (!(*data)) {
118 DP_INFO(cdev, "Failed to allocate LL2 buffer data\n");
119 return -ENOMEM;
120 }
121
122 *phys_addr = dma_map_single(&cdev->pdev->dev,
123 ((*data) + NET_SKB_PAD),
124 cdev->ll2->rx_size, DMA_FROM_DEVICE);
125 if (dma_mapping_error(&cdev->pdev->dev, *phys_addr)) {
126 DP_INFO(cdev, "Failed to map LL2 buffer data\n");
127 kfree((*data));
128 return -ENOMEM;
129 }
130
131 return 0;
132 }
133
134 static int qed_ll2_dealloc_buffer(struct qed_dev *cdev,
135 struct qed_ll2_buffer *buffer)
136 {
137 spin_lock_bh(&cdev->ll2->lock);
138
139 dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
140 cdev->ll2->rx_size, DMA_FROM_DEVICE);
141 kfree(buffer->data);
142 list_del(&buffer->list);
143
144 cdev->ll2->rx_cnt--;
145 if (!cdev->ll2->rx_cnt)
146 DP_INFO(cdev, "All LL2 entries were removed\n");
147
148 spin_unlock_bh(&cdev->ll2->lock);
149
150 return 0;
151 }
152
153 static void qed_ll2_kill_buffers(struct qed_dev *cdev)
154 {
155 struct qed_ll2_buffer *buffer, *tmp_buffer;
156
157 list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list)
158 qed_ll2_dealloc_buffer(cdev, buffer);
159 }
160
161 void qed_ll2b_complete_rx_packet(void *cxt, struct qed_ll2_comp_rx_data *data)
162 {
163 struct qed_hwfn *p_hwfn = cxt;
164 struct qed_ll2_buffer *buffer = data->cookie;
165 struct qed_dev *cdev = p_hwfn->cdev;
166 dma_addr_t new_phys_addr;
167 struct sk_buff *skb;
168 bool reuse = false;
169 int rc = -EINVAL;
170 u8 *new_data;
171
172 DP_VERBOSE(p_hwfn,
173 (NETIF_MSG_RX_STATUS | QED_MSG_STORAGE | NETIF_MSG_PKTDATA),
174 "Got an LL2 Rx completion: [Buffer at phys 0x%llx, offset 0x%02x] Length 0x%04x Parse_flags 0x%04x vlan 0x%04x Opaque data [0x%08x:0x%08x]\n",
175 (u64)data->rx_buf_addr,
176 data->u.placement_offset,
177 data->length.packet_length,
178 data->parse_flags,
179 data->vlan, data->opaque_data_0, data->opaque_data_1);
180
181 if ((cdev->dp_module & NETIF_MSG_PKTDATA) && buffer->data) {
182 print_hex_dump(KERN_INFO, "",
183 DUMP_PREFIX_OFFSET, 16, 1,
184 buffer->data, data->length.packet_length, false);
185 }
186
187 /* Determine if data is valid */
188 if (data->length.packet_length < ETH_HLEN)
189 reuse = true;
190
191 /* Allocate a replacement for buffer; Reuse upon failure */
192 if (!reuse)
193 rc = qed_ll2_alloc_buffer(p_hwfn->cdev, &new_data,
194 &new_phys_addr);
195
196 /* If need to reuse or there's no replacement buffer, repost this */
197 if (rc)
198 goto out_post;
199 dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
200 cdev->ll2->rx_size, DMA_FROM_DEVICE);
201
202 skb = build_skb(buffer->data, 0);
203 if (!skb) {
204 rc = -ENOMEM;
205 goto out_post;
206 }
207
208 data->u.placement_offset += NET_SKB_PAD;
209 skb_reserve(skb, data->u.placement_offset);
210 skb_put(skb, data->length.packet_length);
211 skb_checksum_none_assert(skb);
212
213 /* Get parital ethernet information instead of eth_type_trans(),
214 * Since we don't have an associated net_device.
215 */
216 skb_reset_mac_header(skb);
217 skb->protocol = eth_hdr(skb)->h_proto;
218
219 /* Pass SKB onward */
220 if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) {
221 if (data->vlan)
222 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
223 data->vlan);
224 cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb,
225 data->opaque_data_0,
226 data->opaque_data_1);
227 }
228
229 /* Update Buffer information and update FW producer */
230 buffer->data = new_data;
231 buffer->phys_addr = new_phys_addr;
232
233 out_post:
234 rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev), cdev->ll2->handle,
235 buffer->phys_addr, 0, buffer, 1);
236
237 if (rc)
238 qed_ll2_dealloc_buffer(cdev, buffer);
239 }
240
241 static struct qed_ll2_info *__qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
242 u8 connection_handle,
243 bool b_lock,
244 bool b_only_active)
245 {
246 struct qed_ll2_info *p_ll2_conn, *p_ret = NULL;
247
248 if (connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS)
249 return NULL;
250
251 if (!p_hwfn->p_ll2_info)
252 return NULL;
253
254 p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
255
256 if (b_only_active) {
257 if (b_lock)
258 mutex_lock(&p_ll2_conn->mutex);
259 if (p_ll2_conn->b_active)
260 p_ret = p_ll2_conn;
261 if (b_lock)
262 mutex_unlock(&p_ll2_conn->mutex);
263 } else {
264 p_ret = p_ll2_conn;
265 }
266
267 return p_ret;
268 }
269
270 static struct qed_ll2_info *qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
271 u8 connection_handle)
272 {
273 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, true);
274 }
275
276 static struct qed_ll2_info *qed_ll2_handle_sanity_lock(struct qed_hwfn *p_hwfn,
277 u8 connection_handle)
278 {
279 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, true, true);
280 }
281
282 static struct qed_ll2_info *qed_ll2_handle_sanity_inactive(struct qed_hwfn
283 *p_hwfn,
284 u8 connection_handle)
285 {
286 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, false);
287 }
288
289 static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
290 {
291 bool b_last_packet = false, b_last_frag = false;
292 struct qed_ll2_tx_packet *p_pkt = NULL;
293 struct qed_ll2_info *p_ll2_conn;
294 struct qed_ll2_tx_queue *p_tx;
295 dma_addr_t tx_frag;
296
297 p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
298 if (!p_ll2_conn)
299 return;
300
301 p_tx = &p_ll2_conn->tx_queue;
302
303 while (!list_empty(&p_tx->active_descq)) {
304 p_pkt = list_first_entry(&p_tx->active_descq,
305 struct qed_ll2_tx_packet, list_entry);
306 if (!p_pkt)
307 break;
308
309 list_del(&p_pkt->list_entry);
310 b_last_packet = list_empty(&p_tx->active_descq);
311 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
312 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
313 struct qed_ooo_buffer *p_buffer;
314
315 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
316 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
317 p_buffer);
318 } else {
319 p_tx->cur_completing_packet = *p_pkt;
320 p_tx->cur_completing_bd_idx = 1;
321 b_last_frag =
322 p_tx->cur_completing_bd_idx == p_pkt->bd_used;
323 tx_frag = p_pkt->bds_set[0].tx_frag;
324 p_ll2_conn->cbs.tx_release_cb(p_ll2_conn->cbs.cookie,
325 p_ll2_conn->my_id,
326 p_pkt->cookie,
327 tx_frag,
328 b_last_frag,
329 b_last_packet);
330 }
331 }
332 }
333
334 static int qed_ll2_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
335 {
336 struct qed_ll2_info *p_ll2_conn = p_cookie;
337 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
338 u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0;
339 struct qed_ll2_tx_packet *p_pkt;
340 bool b_last_frag = false;
341 unsigned long flags;
342 int rc = -EINVAL;
343
344 spin_lock_irqsave(&p_tx->lock, flags);
345 if (p_tx->b_completing_packet) {
346 rc = -EBUSY;
347 goto out;
348 }
349
350 new_idx = le16_to_cpu(*p_tx->p_fw_cons);
351 num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
352 while (num_bds) {
353 if (list_empty(&p_tx->active_descq))
354 goto out;
355
356 p_pkt = list_first_entry(&p_tx->active_descq,
357 struct qed_ll2_tx_packet, list_entry);
358 if (!p_pkt)
359 goto out;
360
361 p_tx->b_completing_packet = true;
362 p_tx->cur_completing_packet = *p_pkt;
363 num_bds_in_packet = p_pkt->bd_used;
364 list_del(&p_pkt->list_entry);
365
366 if (num_bds < num_bds_in_packet) {
367 DP_NOTICE(p_hwfn,
368 "Rest of BDs does not cover whole packet\n");
369 goto out;
370 }
371
372 num_bds -= num_bds_in_packet;
373 p_tx->bds_idx += num_bds_in_packet;
374 while (num_bds_in_packet--)
375 qed_chain_consume(&p_tx->txq_chain);
376
377 p_tx->cur_completing_bd_idx = 1;
378 b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used;
379 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
380
381 spin_unlock_irqrestore(&p_tx->lock, flags);
382
383 p_ll2_conn->cbs.tx_comp_cb(p_ll2_conn->cbs.cookie,
384 p_ll2_conn->my_id,
385 p_pkt->cookie,
386 p_pkt->bds_set[0].tx_frag,
387 b_last_frag, !num_bds);
388
389 spin_lock_irqsave(&p_tx->lock, flags);
390 }
391
392 p_tx->b_completing_packet = false;
393 rc = 0;
394 out:
395 spin_unlock_irqrestore(&p_tx->lock, flags);
396 return rc;
397 }
398
399 static void qed_ll2_rxq_parse_gsi(struct qed_hwfn *p_hwfn,
400 union core_rx_cqe_union *p_cqe,
401 struct qed_ll2_comp_rx_data *data)
402 {
403 data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_gsi.parse_flags.flags);
404 data->length.data_length = le16_to_cpu(p_cqe->rx_cqe_gsi.data_length);
405 data->vlan = le16_to_cpu(p_cqe->rx_cqe_gsi.vlan);
406 data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrhi);
407 data->opaque_data_1 = le16_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrlo);
408 data->u.data_length_error = p_cqe->rx_cqe_gsi.data_length_error;
409 data->qp_id = le16_to_cpu(p_cqe->rx_cqe_gsi.qp_id);
410
411 data->src_qp = le32_to_cpu(p_cqe->rx_cqe_gsi.src_qp);
412 }
413
414 static void qed_ll2_rxq_parse_reg(struct qed_hwfn *p_hwfn,
415 union core_rx_cqe_union *p_cqe,
416 struct qed_ll2_comp_rx_data *data)
417 {
418 data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_fp.parse_flags.flags);
419 data->err_flags = le16_to_cpu(p_cqe->rx_cqe_fp.err_flags.flags);
420 data->length.packet_length =
421 le16_to_cpu(p_cqe->rx_cqe_fp.packet_length);
422 data->vlan = le16_to_cpu(p_cqe->rx_cqe_fp.vlan);
423 data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[0]);
424 data->opaque_data_1 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[1]);
425 data->u.placement_offset = p_cqe->rx_cqe_fp.placement_offset;
426 }
427
428 static int
429 qed_ll2_handle_slowpath(struct qed_hwfn *p_hwfn,
430 struct qed_ll2_info *p_ll2_conn,
431 union core_rx_cqe_union *p_cqe,
432 unsigned long *p_lock_flags)
433 {
434 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
435 struct core_rx_slow_path_cqe *sp_cqe;
436
437 sp_cqe = &p_cqe->rx_cqe_sp;
438 if (sp_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH) {
439 DP_NOTICE(p_hwfn,
440 "LL2 - unexpected Rx CQE slowpath ramrod_cmd_id:%d\n",
441 sp_cqe->ramrod_cmd_id);
442 return -EINVAL;
443 }
444
445 if (!p_ll2_conn->cbs.slowpath_cb) {
446 DP_NOTICE(p_hwfn,
447 "LL2 - received RX_QUEUE_FLUSH but no callback was provided\n");
448 return -EINVAL;
449 }
450
451 spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
452
453 p_ll2_conn->cbs.slowpath_cb(p_ll2_conn->cbs.cookie,
454 p_ll2_conn->my_id,
455 le32_to_cpu(sp_cqe->opaque_data.data[0]),
456 le32_to_cpu(sp_cqe->opaque_data.data[1]));
457
458 spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
459
460 return 0;
461 }
462
463 static int
464 qed_ll2_rxq_handle_completion(struct qed_hwfn *p_hwfn,
465 struct qed_ll2_info *p_ll2_conn,
466 union core_rx_cqe_union *p_cqe,
467 unsigned long *p_lock_flags, bool b_last_cqe)
468 {
469 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
470 struct qed_ll2_rx_packet *p_pkt = NULL;
471 struct qed_ll2_comp_rx_data data;
472
473 if (!list_empty(&p_rx->active_descq))
474 p_pkt = list_first_entry(&p_rx->active_descq,
475 struct qed_ll2_rx_packet, list_entry);
476 if (!p_pkt) {
477 DP_NOTICE(p_hwfn,
478 "[%d] LL2 Rx completion but active_descq is empty\n",
479 p_ll2_conn->input.conn_type);
480
481 return -EIO;
482 }
483 list_del(&p_pkt->list_entry);
484
485 if (p_cqe->rx_cqe_sp.type == CORE_RX_CQE_TYPE_REGULAR)
486 qed_ll2_rxq_parse_reg(p_hwfn, p_cqe, &data);
487 else
488 qed_ll2_rxq_parse_gsi(p_hwfn, p_cqe, &data);
489 if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd)
490 DP_NOTICE(p_hwfn,
491 "Mismatch between active_descq and the LL2 Rx chain\n");
492
493 list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
494
495 data.connection_handle = p_ll2_conn->my_id;
496 data.cookie = p_pkt->cookie;
497 data.rx_buf_addr = p_pkt->rx_buf_addr;
498 data.b_last_packet = b_last_cqe;
499
500 spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
501 p_ll2_conn->cbs.rx_comp_cb(p_ll2_conn->cbs.cookie, &data);
502
503 spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
504
505 return 0;
506 }
507
508 static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie)
509 {
510 struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)cookie;
511 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
512 union core_rx_cqe_union *cqe = NULL;
513 u16 cq_new_idx = 0, cq_old_idx = 0;
514 unsigned long flags = 0;
515 int rc = 0;
516
517 spin_lock_irqsave(&p_rx->lock, flags);
518 cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
519 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
520
521 while (cq_new_idx != cq_old_idx) {
522 bool b_last_cqe = (cq_new_idx == cq_old_idx);
523
524 cqe =
525 (union core_rx_cqe_union *)
526 qed_chain_consume(&p_rx->rcq_chain);
527 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
528
529 DP_VERBOSE(p_hwfn,
530 QED_MSG_LL2,
531 "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n",
532 cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type);
533
534 switch (cqe->rx_cqe_sp.type) {
535 case CORE_RX_CQE_TYPE_SLOW_PATH:
536 rc = qed_ll2_handle_slowpath(p_hwfn, p_ll2_conn,
537 cqe, &flags);
538 break;
539 case CORE_RX_CQE_TYPE_GSI_OFFLOAD:
540 case CORE_RX_CQE_TYPE_REGULAR:
541 rc = qed_ll2_rxq_handle_completion(p_hwfn, p_ll2_conn,
542 cqe, &flags,
543 b_last_cqe);
544 break;
545 default:
546 rc = -EIO;
547 }
548 }
549
550 spin_unlock_irqrestore(&p_rx->lock, flags);
551 return rc;
552 }
553
554 static void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
555 {
556 struct qed_ll2_info *p_ll2_conn = NULL;
557 struct qed_ll2_rx_packet *p_pkt = NULL;
558 struct qed_ll2_rx_queue *p_rx;
559
560 p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
561 if (!p_ll2_conn)
562 return;
563
564 p_rx = &p_ll2_conn->rx_queue;
565
566 while (!list_empty(&p_rx->active_descq)) {
567 p_pkt = list_first_entry(&p_rx->active_descq,
568 struct qed_ll2_rx_packet, list_entry);
569 if (!p_pkt)
570 break;
571
572 list_move_tail(&p_pkt->list_entry, &p_rx->free_descq);
573
574 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
575 struct qed_ooo_buffer *p_buffer;
576
577 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
578 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
579 p_buffer);
580 } else {
581 dma_addr_t rx_buf_addr = p_pkt->rx_buf_addr;
582 void *cookie = p_pkt->cookie;
583 bool b_last;
584
585 b_last = list_empty(&p_rx->active_descq);
586 p_ll2_conn->cbs.rx_release_cb(p_ll2_conn->cbs.cookie,
587 p_ll2_conn->my_id,
588 cookie,
589 rx_buf_addr, b_last);
590 }
591 }
592 }
593
594 static u8 qed_ll2_convert_rx_parse_to_tx_flags(u16 parse_flags)
595 {
596 u8 bd_flags = 0;
597
598 if (GET_FIELD(parse_flags, PARSING_AND_ERR_FLAGS_TAG8021QEXIST))
599 SET_FIELD(bd_flags, CORE_TX_BD_DATA_VLAN_INSERTION, 1);
600
601 return bd_flags;
602 }
603
604 static int qed_ll2_lb_rxq_handler(struct qed_hwfn *p_hwfn,
605 struct qed_ll2_info *p_ll2_conn)
606 {
607 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
608 u16 packet_length = 0, parse_flags = 0, vlan = 0;
609 struct qed_ll2_rx_packet *p_pkt = NULL;
610 u32 num_ooo_add_to_peninsula = 0, cid;
611 union core_rx_cqe_union *cqe = NULL;
612 u16 cq_new_idx = 0, cq_old_idx = 0;
613 struct qed_ooo_buffer *p_buffer;
614 struct ooo_opaque *iscsi_ooo;
615 u8 placement_offset = 0;
616 u8 cqe_type;
617
618 cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
619 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
620 if (cq_new_idx == cq_old_idx)
621 return 0;
622
623 while (cq_new_idx != cq_old_idx) {
624 struct core_rx_fast_path_cqe *p_cqe_fp;
625
626 cqe = qed_chain_consume(&p_rx->rcq_chain);
627 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
628 cqe_type = cqe->rx_cqe_sp.type;
629
630 if (cqe_type != CORE_RX_CQE_TYPE_REGULAR) {
631 DP_NOTICE(p_hwfn,
632 "Got a non-regular LB LL2 completion [type 0x%02x]\n",
633 cqe_type);
634 return -EINVAL;
635 }
636 p_cqe_fp = &cqe->rx_cqe_fp;
637
638 placement_offset = p_cqe_fp->placement_offset;
639 parse_flags = le16_to_cpu(p_cqe_fp->parse_flags.flags);
640 packet_length = le16_to_cpu(p_cqe_fp->packet_length);
641 vlan = le16_to_cpu(p_cqe_fp->vlan);
642 iscsi_ooo = (struct ooo_opaque *)&p_cqe_fp->opaque_data;
643 qed_ooo_save_history_entry(p_hwfn, p_hwfn->p_ooo_info,
644 iscsi_ooo);
645 cid = le32_to_cpu(iscsi_ooo->cid);
646
647 /* Process delete isle first */
648 if (iscsi_ooo->drop_size)
649 qed_ooo_delete_isles(p_hwfn, p_hwfn->p_ooo_info, cid,
650 iscsi_ooo->drop_isle,
651 iscsi_ooo->drop_size);
652
653 if (iscsi_ooo->ooo_opcode == TCP_EVENT_NOP)
654 continue;
655
656 /* Now process create/add/join isles */
657 if (list_empty(&p_rx->active_descq)) {
658 DP_NOTICE(p_hwfn,
659 "LL2 OOO RX chain has no submitted buffers\n"
660 );
661 return -EIO;
662 }
663
664 p_pkt = list_first_entry(&p_rx->active_descq,
665 struct qed_ll2_rx_packet, list_entry);
666
667 if ((iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_NEW_ISLE) ||
668 (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_RIGHT) ||
669 (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_LEFT) ||
670 (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_PEN) ||
671 (iscsi_ooo->ooo_opcode == TCP_EVENT_JOIN)) {
672 if (!p_pkt) {
673 DP_NOTICE(p_hwfn,
674 "LL2 OOO RX packet is not valid\n");
675 return -EIO;
676 }
677 list_del(&p_pkt->list_entry);
678 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
679 p_buffer->packet_length = packet_length;
680 p_buffer->parse_flags = parse_flags;
681 p_buffer->vlan = vlan;
682 p_buffer->placement_offset = placement_offset;
683 qed_chain_consume(&p_rx->rxq_chain);
684 list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
685
686 switch (iscsi_ooo->ooo_opcode) {
687 case TCP_EVENT_ADD_NEW_ISLE:
688 qed_ooo_add_new_isle(p_hwfn,
689 p_hwfn->p_ooo_info,
690 cid,
691 iscsi_ooo->ooo_isle,
692 p_buffer);
693 break;
694 case TCP_EVENT_ADD_ISLE_RIGHT:
695 qed_ooo_add_new_buffer(p_hwfn,
696 p_hwfn->p_ooo_info,
697 cid,
698 iscsi_ooo->ooo_isle,
699 p_buffer,
700 QED_OOO_RIGHT_BUF);
701 break;
702 case TCP_EVENT_ADD_ISLE_LEFT:
703 qed_ooo_add_new_buffer(p_hwfn,
704 p_hwfn->p_ooo_info,
705 cid,
706 iscsi_ooo->ooo_isle,
707 p_buffer,
708 QED_OOO_LEFT_BUF);
709 break;
710 case TCP_EVENT_JOIN:
711 qed_ooo_add_new_buffer(p_hwfn,
712 p_hwfn->p_ooo_info,
713 cid,
714 iscsi_ooo->ooo_isle +
715 1,
716 p_buffer,
717 QED_OOO_LEFT_BUF);
718 qed_ooo_join_isles(p_hwfn,
719 p_hwfn->p_ooo_info,
720 cid, iscsi_ooo->ooo_isle);
721 break;
722 case TCP_EVENT_ADD_PEN:
723 num_ooo_add_to_peninsula++;
724 qed_ooo_put_ready_buffer(p_hwfn,
725 p_hwfn->p_ooo_info,
726 p_buffer, true);
727 break;
728 }
729 } else {
730 DP_NOTICE(p_hwfn,
731 "Unexpected event (%d) TX OOO completion\n",
732 iscsi_ooo->ooo_opcode);
733 }
734 }
735
736 return 0;
737 }
738
739 static void
740 qed_ooo_submit_tx_buffers(struct qed_hwfn *p_hwfn,
741 struct qed_ll2_info *p_ll2_conn)
742 {
743 struct qed_ll2_tx_pkt_info tx_pkt;
744 struct qed_ooo_buffer *p_buffer;
745 u16 l4_hdr_offset_w;
746 dma_addr_t first_frag;
747 u16 parse_flags;
748 u8 bd_flags;
749 int rc;
750
751 /* Submit Tx buffers here */
752 while ((p_buffer = qed_ooo_get_ready_buffer(p_hwfn,
753 p_hwfn->p_ooo_info))) {
754 l4_hdr_offset_w = 0;
755 bd_flags = 0;
756
757 first_frag = p_buffer->rx_buffer_phys_addr +
758 p_buffer->placement_offset;
759 parse_flags = p_buffer->parse_flags;
760 bd_flags = qed_ll2_convert_rx_parse_to_tx_flags(parse_flags);
761 SET_FIELD(bd_flags, CORE_TX_BD_DATA_FORCE_VLAN_MODE, 1);
762 SET_FIELD(bd_flags, CORE_TX_BD_DATA_L4_PROTOCOL, 1);
763
764 memset(&tx_pkt, 0, sizeof(tx_pkt));
765 tx_pkt.num_of_bds = 1;
766 tx_pkt.vlan = p_buffer->vlan;
767 tx_pkt.bd_flags = bd_flags;
768 tx_pkt.l4_hdr_offset_w = l4_hdr_offset_w;
769 tx_pkt.tx_dest = p_ll2_conn->tx_dest;
770 tx_pkt.first_frag = first_frag;
771 tx_pkt.first_frag_len = p_buffer->packet_length;
772 tx_pkt.cookie = p_buffer;
773
774 rc = qed_ll2_prepare_tx_packet(p_hwfn, p_ll2_conn->my_id,
775 &tx_pkt, true);
776 if (rc) {
777 qed_ooo_put_ready_buffer(p_hwfn, p_hwfn->p_ooo_info,
778 p_buffer, false);
779 break;
780 }
781 }
782 }
783
784 static void
785 qed_ooo_submit_rx_buffers(struct qed_hwfn *p_hwfn,
786 struct qed_ll2_info *p_ll2_conn)
787 {
788 struct qed_ooo_buffer *p_buffer;
789 int rc;
790
791 while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
792 p_hwfn->p_ooo_info))) {
793 rc = qed_ll2_post_rx_buffer(p_hwfn,
794 p_ll2_conn->my_id,
795 p_buffer->rx_buffer_phys_addr,
796 0, p_buffer, true);
797 if (rc) {
798 qed_ooo_put_free_buffer(p_hwfn,
799 p_hwfn->p_ooo_info, p_buffer);
800 break;
801 }
802 }
803 }
804
805 static int qed_ll2_lb_rxq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
806 {
807 struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
808 int rc;
809
810 rc = qed_ll2_lb_rxq_handler(p_hwfn, p_ll2_conn);
811 if (rc)
812 return rc;
813
814 qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
815 qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
816
817 return 0;
818 }
819
820 static int qed_ll2_lb_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
821 {
822 struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
823 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
824 struct qed_ll2_tx_packet *p_pkt = NULL;
825 struct qed_ooo_buffer *p_buffer;
826 bool b_dont_submit_rx = false;
827 u16 new_idx = 0, num_bds = 0;
828 int rc;
829
830 new_idx = le16_to_cpu(*p_tx->p_fw_cons);
831 num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
832
833 if (!num_bds)
834 return 0;
835
836 while (num_bds) {
837 if (list_empty(&p_tx->active_descq))
838 return -EINVAL;
839
840 p_pkt = list_first_entry(&p_tx->active_descq,
841 struct qed_ll2_tx_packet, list_entry);
842 if (!p_pkt)
843 return -EINVAL;
844
845 if (p_pkt->bd_used != 1) {
846 DP_NOTICE(p_hwfn,
847 "Unexpectedly many BDs(%d) in TX OOO completion\n",
848 p_pkt->bd_used);
849 return -EINVAL;
850 }
851
852 list_del(&p_pkt->list_entry);
853
854 num_bds--;
855 p_tx->bds_idx++;
856 qed_chain_consume(&p_tx->txq_chain);
857
858 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
859 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
860
861 if (b_dont_submit_rx) {
862 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
863 p_buffer);
864 continue;
865 }
866
867 rc = qed_ll2_post_rx_buffer(p_hwfn, p_ll2_conn->my_id,
868 p_buffer->rx_buffer_phys_addr, 0,
869 p_buffer, true);
870 if (rc != 0) {
871 qed_ooo_put_free_buffer(p_hwfn,
872 p_hwfn->p_ooo_info, p_buffer);
873 b_dont_submit_rx = true;
874 }
875 }
876
877 qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
878
879 return 0;
880 }
881
882 static void qed_ll2_stop_ooo(struct qed_dev *cdev)
883 {
884 struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
885 u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
886
887 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Stopping LL2 OOO queue [%02x]\n",
888 *handle);
889
890 qed_ll2_terminate_connection(hwfn, *handle);
891 qed_ll2_release_connection(hwfn, *handle);
892 *handle = QED_LL2_UNUSED_HANDLE;
893 }
894
895 static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn,
896 struct qed_ll2_info *p_ll2_conn,
897 u8 action_on_error)
898 {
899 enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
900 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
901 struct core_rx_start_ramrod_data *p_ramrod = NULL;
902 struct qed_spq_entry *p_ent = NULL;
903 struct qed_sp_init_data init_data;
904 u16 cqe_pbl_size;
905 int rc = 0;
906
907 /* Get SPQ entry */
908 memset(&init_data, 0, sizeof(init_data));
909 init_data.cid = p_ll2_conn->cid;
910 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
911 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
912
913 rc = qed_sp_init_request(p_hwfn, &p_ent,
914 CORE_RAMROD_RX_QUEUE_START,
915 PROTOCOLID_CORE, &init_data);
916 if (rc)
917 return rc;
918
919 p_ramrod = &p_ent->ramrod.core_rx_queue_start;
920
921 p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
922 p_ramrod->sb_index = p_rx->rx_sb_index;
923 p_ramrod->complete_event_flg = 1;
924
925 p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
926 DMA_REGPAIR_LE(p_ramrod->bd_base, p_rx->rxq_chain.p_phys_addr);
927 cqe_pbl_size = (u16)qed_chain_get_page_cnt(&p_rx->rcq_chain);
928 p_ramrod->num_of_pbl_pages = cpu_to_le16(cqe_pbl_size);
929 DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr,
930 qed_chain_get_pbl_phys(&p_rx->rcq_chain));
931
932 p_ramrod->drop_ttl0_flg = p_ll2_conn->input.rx_drop_ttl0_flg;
933 p_ramrod->inner_vlan_stripping_en =
934 p_ll2_conn->input.rx_vlan_removal_en;
935 p_ramrod->queue_id = p_ll2_conn->queue_id;
936 p_ramrod->main_func_queue = p_ll2_conn->main_func_queue ? 1 : 0;
937
938 if ((IS_MF_DEFAULT(p_hwfn) || IS_MF_SI(p_hwfn)) &&
939 p_ramrod->main_func_queue && (conn_type != QED_LL2_TYPE_ROCE) &&
940 (conn_type != QED_LL2_TYPE_IWARP)) {
941 p_ramrod->mf_si_bcast_accept_all = 1;
942 p_ramrod->mf_si_mcast_accept_all = 1;
943 } else {
944 p_ramrod->mf_si_bcast_accept_all = 0;
945 p_ramrod->mf_si_mcast_accept_all = 0;
946 }
947
948 p_ramrod->action_on_error.error_type = action_on_error;
949 p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
950 return qed_spq_post(p_hwfn, p_ent, NULL);
951 }
952
953 static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn,
954 struct qed_ll2_info *p_ll2_conn)
955 {
956 enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
957 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
958 struct core_tx_start_ramrod_data *p_ramrod = NULL;
959 struct qed_spq_entry *p_ent = NULL;
960 struct qed_sp_init_data init_data;
961 u16 pq_id = 0, pbl_size;
962 int rc = -EINVAL;
963
964 if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
965 return 0;
966
967 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
968 p_ll2_conn->tx_stats_en = 0;
969 else
970 p_ll2_conn->tx_stats_en = 1;
971
972 /* Get SPQ entry */
973 memset(&init_data, 0, sizeof(init_data));
974 init_data.cid = p_ll2_conn->cid;
975 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
976 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
977
978 rc = qed_sp_init_request(p_hwfn, &p_ent,
979 CORE_RAMROD_TX_QUEUE_START,
980 PROTOCOLID_CORE, &init_data);
981 if (rc)
982 return rc;
983
984 p_ramrod = &p_ent->ramrod.core_tx_queue_start;
985
986 p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
987 p_ramrod->sb_index = p_tx->tx_sb_index;
988 p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
989 p_ramrod->stats_en = p_ll2_conn->tx_stats_en;
990 p_ramrod->stats_id = p_ll2_conn->tx_stats_id;
991
992 DMA_REGPAIR_LE(p_ramrod->pbl_base_addr,
993 qed_chain_get_pbl_phys(&p_tx->txq_chain));
994 pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain);
995 p_ramrod->pbl_size = cpu_to_le16(pbl_size);
996
997 switch (p_ll2_conn->input.tx_tc) {
998 case PURE_LB_TC:
999 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB);
1000 break;
1001 case PKT_LB_TC:
1002 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OOO);
1003 break;
1004 default:
1005 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
1006 break;
1007 }
1008
1009 p_ramrod->qm_pq_id = cpu_to_le16(pq_id);
1010
1011 switch (conn_type) {
1012 case QED_LL2_TYPE_FCOE:
1013 p_ramrod->conn_type = PROTOCOLID_FCOE;
1014 break;
1015 case QED_LL2_TYPE_ISCSI:
1016 p_ramrod->conn_type = PROTOCOLID_ISCSI;
1017 break;
1018 case QED_LL2_TYPE_ROCE:
1019 p_ramrod->conn_type = PROTOCOLID_ROCE;
1020 break;
1021 case QED_LL2_TYPE_IWARP:
1022 p_ramrod->conn_type = PROTOCOLID_IWARP;
1023 break;
1024 case QED_LL2_TYPE_OOO:
1025 if (p_hwfn->hw_info.personality == QED_PCI_ISCSI)
1026 p_ramrod->conn_type = PROTOCOLID_ISCSI;
1027 else
1028 p_ramrod->conn_type = PROTOCOLID_IWARP;
1029 break;
1030 default:
1031 p_ramrod->conn_type = PROTOCOLID_ETH;
1032 DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type);
1033 }
1034
1035 p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
1036
1037 return qed_spq_post(p_hwfn, p_ent, NULL);
1038 }
1039
1040 static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn,
1041 struct qed_ll2_info *p_ll2_conn)
1042 {
1043 struct core_rx_stop_ramrod_data *p_ramrod = NULL;
1044 struct qed_spq_entry *p_ent = NULL;
1045 struct qed_sp_init_data init_data;
1046 int rc = -EINVAL;
1047
1048 /* Get SPQ entry */
1049 memset(&init_data, 0, sizeof(init_data));
1050 init_data.cid = p_ll2_conn->cid;
1051 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1052 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1053
1054 rc = qed_sp_init_request(p_hwfn, &p_ent,
1055 CORE_RAMROD_RX_QUEUE_STOP,
1056 PROTOCOLID_CORE, &init_data);
1057 if (rc)
1058 return rc;
1059
1060 p_ramrod = &p_ent->ramrod.core_rx_queue_stop;
1061
1062 p_ramrod->complete_event_flg = 1;
1063 p_ramrod->queue_id = p_ll2_conn->queue_id;
1064
1065 return qed_spq_post(p_hwfn, p_ent, NULL);
1066 }
1067
1068 static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn,
1069 struct qed_ll2_info *p_ll2_conn)
1070 {
1071 struct qed_spq_entry *p_ent = NULL;
1072 struct qed_sp_init_data init_data;
1073 int rc = -EINVAL;
1074
1075 /* Get SPQ entry */
1076 memset(&init_data, 0, sizeof(init_data));
1077 init_data.cid = p_ll2_conn->cid;
1078 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1079 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1080
1081 rc = qed_sp_init_request(p_hwfn, &p_ent,
1082 CORE_RAMROD_TX_QUEUE_STOP,
1083 PROTOCOLID_CORE, &init_data);
1084 if (rc)
1085 return rc;
1086
1087 return qed_spq_post(p_hwfn, p_ent, NULL);
1088 }
1089
1090 static int
1091 qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
1092 struct qed_ll2_info *p_ll2_info)
1093 {
1094 struct qed_ll2_rx_packet *p_descq;
1095 u32 capacity;
1096 int rc = 0;
1097
1098 if (!p_ll2_info->input.rx_num_desc)
1099 goto out;
1100
1101 rc = qed_chain_alloc(p_hwfn->cdev,
1102 QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1103 QED_CHAIN_MODE_NEXT_PTR,
1104 QED_CHAIN_CNT_TYPE_U16,
1105 p_ll2_info->input.rx_num_desc,
1106 sizeof(struct core_rx_bd),
1107 &p_ll2_info->rx_queue.rxq_chain, NULL);
1108 if (rc) {
1109 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n");
1110 goto out;
1111 }
1112
1113 capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain);
1114 p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet),
1115 GFP_KERNEL);
1116 if (!p_descq) {
1117 rc = -ENOMEM;
1118 DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n");
1119 goto out;
1120 }
1121 p_ll2_info->rx_queue.descq_array = p_descq;
1122
1123 rc = qed_chain_alloc(p_hwfn->cdev,
1124 QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1125 QED_CHAIN_MODE_PBL,
1126 QED_CHAIN_CNT_TYPE_U16,
1127 p_ll2_info->input.rx_num_desc,
1128 sizeof(struct core_rx_fast_path_cqe),
1129 &p_ll2_info->rx_queue.rcq_chain, NULL);
1130 if (rc) {
1131 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n");
1132 goto out;
1133 }
1134
1135 DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1136 "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n",
1137 p_ll2_info->input.conn_type, p_ll2_info->input.rx_num_desc);
1138
1139 out:
1140 return rc;
1141 }
1142
1143 static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
1144 struct qed_ll2_info *p_ll2_info)
1145 {
1146 struct qed_ll2_tx_packet *p_descq;
1147 u32 desc_size;
1148 u32 capacity;
1149 int rc = 0;
1150
1151 if (!p_ll2_info->input.tx_num_desc)
1152 goto out;
1153
1154 rc = qed_chain_alloc(p_hwfn->cdev,
1155 QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1156 QED_CHAIN_MODE_PBL,
1157 QED_CHAIN_CNT_TYPE_U16,
1158 p_ll2_info->input.tx_num_desc,
1159 sizeof(struct core_tx_bd),
1160 &p_ll2_info->tx_queue.txq_chain, NULL);
1161 if (rc)
1162 goto out;
1163
1164 capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain);
1165 /* First element is part of the packet, rest are flexibly added */
1166 desc_size = (sizeof(*p_descq) +
1167 (p_ll2_info->input.tx_max_bds_per_packet - 1) *
1168 sizeof(p_descq->bds_set));
1169
1170 p_descq = kcalloc(capacity, desc_size, GFP_KERNEL);
1171 if (!p_descq) {
1172 rc = -ENOMEM;
1173 goto out;
1174 }
1175 p_ll2_info->tx_queue.descq_mem = p_descq;
1176
1177 DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1178 "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n",
1179 p_ll2_info->input.conn_type, p_ll2_info->input.tx_num_desc);
1180
1181 out:
1182 if (rc)
1183 DP_NOTICE(p_hwfn,
1184 "Can't allocate memory for Tx LL2 with 0x%08x buffers\n",
1185 p_ll2_info->input.tx_num_desc);
1186 return rc;
1187 }
1188
1189 static int
1190 qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn,
1191 struct qed_ll2_info *p_ll2_info, u16 mtu)
1192 {
1193 struct qed_ooo_buffer *p_buf = NULL;
1194 void *p_virt;
1195 u16 buf_idx;
1196 int rc = 0;
1197
1198 if (p_ll2_info->input.conn_type != QED_LL2_TYPE_OOO)
1199 return rc;
1200
1201 /* Correct number of requested OOO buffers if needed */
1202 if (!p_ll2_info->input.rx_num_ooo_buffers) {
1203 u16 num_desc = p_ll2_info->input.rx_num_desc;
1204
1205 if (!num_desc)
1206 return -EINVAL;
1207 p_ll2_info->input.rx_num_ooo_buffers = num_desc * 2;
1208 }
1209
1210 for (buf_idx = 0; buf_idx < p_ll2_info->input.rx_num_ooo_buffers;
1211 buf_idx++) {
1212 p_buf = kzalloc(sizeof(*p_buf), GFP_KERNEL);
1213 if (!p_buf) {
1214 rc = -ENOMEM;
1215 goto out;
1216 }
1217
1218 p_buf->rx_buffer_size = mtu + 26 + ETH_CACHE_LINE_SIZE;
1219 p_buf->rx_buffer_size = (p_buf->rx_buffer_size +
1220 ETH_CACHE_LINE_SIZE - 1) &
1221 ~(ETH_CACHE_LINE_SIZE - 1);
1222 p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
1223 p_buf->rx_buffer_size,
1224 &p_buf->rx_buffer_phys_addr,
1225 GFP_KERNEL);
1226 if (!p_virt) {
1227 kfree(p_buf);
1228 rc = -ENOMEM;
1229 goto out;
1230 }
1231
1232 p_buf->rx_buffer_virt_addr = p_virt;
1233 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buf);
1234 }
1235
1236 DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1237 "Allocated [%04x] LL2 OOO buffers [each of size 0x%08x]\n",
1238 p_ll2_info->input.rx_num_ooo_buffers, p_buf->rx_buffer_size);
1239
1240 out:
1241 return rc;
1242 }
1243
1244 static int
1245 qed_ll2_set_cbs(struct qed_ll2_info *p_ll2_info, const struct qed_ll2_cbs *cbs)
1246 {
1247 if (!cbs || (!cbs->rx_comp_cb ||
1248 !cbs->rx_release_cb ||
1249 !cbs->tx_comp_cb || !cbs->tx_release_cb || !cbs->cookie))
1250 return -EINVAL;
1251
1252 p_ll2_info->cbs.rx_comp_cb = cbs->rx_comp_cb;
1253 p_ll2_info->cbs.rx_release_cb = cbs->rx_release_cb;
1254 p_ll2_info->cbs.tx_comp_cb = cbs->tx_comp_cb;
1255 p_ll2_info->cbs.tx_release_cb = cbs->tx_release_cb;
1256 p_ll2_info->cbs.slowpath_cb = cbs->slowpath_cb;
1257 p_ll2_info->cbs.cookie = cbs->cookie;
1258
1259 return 0;
1260 }
1261
1262 static enum core_error_handle
1263 qed_ll2_get_error_choice(enum qed_ll2_error_handle err)
1264 {
1265 switch (err) {
1266 case QED_LL2_DROP_PACKET:
1267 return LL2_DROP_PACKET;
1268 case QED_LL2_DO_NOTHING:
1269 return LL2_DO_NOTHING;
1270 case QED_LL2_ASSERT:
1271 return LL2_ASSERT;
1272 default:
1273 return LL2_DO_NOTHING;
1274 }
1275 }
1276
1277 int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data)
1278 {
1279 struct qed_hwfn *p_hwfn = cxt;
1280 qed_int_comp_cb_t comp_rx_cb, comp_tx_cb;
1281 struct qed_ll2_info *p_ll2_info = NULL;
1282 u8 i, *p_tx_max;
1283 int rc;
1284
1285 if (!data->p_connection_handle || !p_hwfn->p_ll2_info)
1286 return -EINVAL;
1287
1288 /* Find a free connection to be used */
1289 for (i = 0; (i < QED_MAX_NUM_OF_LL2_CONNECTIONS); i++) {
1290 mutex_lock(&p_hwfn->p_ll2_info[i].mutex);
1291 if (p_hwfn->p_ll2_info[i].b_active) {
1292 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1293 continue;
1294 }
1295
1296 p_hwfn->p_ll2_info[i].b_active = true;
1297 p_ll2_info = &p_hwfn->p_ll2_info[i];
1298 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1299 break;
1300 }
1301 if (!p_ll2_info)
1302 return -EBUSY;
1303
1304 memcpy(&p_ll2_info->input, &data->input, sizeof(p_ll2_info->input));
1305
1306 switch (data->input.tx_dest) {
1307 case QED_LL2_TX_DEST_NW:
1308 p_ll2_info->tx_dest = CORE_TX_DEST_NW;
1309 break;
1310 case QED_LL2_TX_DEST_LB:
1311 p_ll2_info->tx_dest = CORE_TX_DEST_LB;
1312 break;
1313 case QED_LL2_TX_DEST_DROP:
1314 p_ll2_info->tx_dest = CORE_TX_DEST_DROP;
1315 break;
1316 default:
1317 return -EINVAL;
1318 }
1319
1320 if (data->input.conn_type == QED_LL2_TYPE_OOO ||
1321 data->input.secondary_queue)
1322 p_ll2_info->main_func_queue = false;
1323 else
1324 p_ll2_info->main_func_queue = true;
1325
1326 /* Correct maximum number of Tx BDs */
1327 p_tx_max = &p_ll2_info->input.tx_max_bds_per_packet;
1328 if (*p_tx_max == 0)
1329 *p_tx_max = CORE_LL2_TX_MAX_BDS_PER_PACKET;
1330 else
1331 *p_tx_max = min_t(u8, *p_tx_max,
1332 CORE_LL2_TX_MAX_BDS_PER_PACKET);
1333
1334 rc = qed_ll2_set_cbs(p_ll2_info, data->cbs);
1335 if (rc) {
1336 DP_NOTICE(p_hwfn, "Invalid callback functions\n");
1337 goto q_allocate_fail;
1338 }
1339
1340 rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info);
1341 if (rc)
1342 goto q_allocate_fail;
1343
1344 rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info);
1345 if (rc)
1346 goto q_allocate_fail;
1347
1348 rc = qed_ll2_acquire_connection_ooo(p_hwfn, p_ll2_info,
1349 data->input.mtu);
1350 if (rc)
1351 goto q_allocate_fail;
1352
1353 /* Register callbacks for the Rx/Tx queues */
1354 if (data->input.conn_type == QED_LL2_TYPE_OOO) {
1355 comp_rx_cb = qed_ll2_lb_rxq_completion;
1356 comp_tx_cb = qed_ll2_lb_txq_completion;
1357 } else {
1358 comp_rx_cb = qed_ll2_rxq_completion;
1359 comp_tx_cb = qed_ll2_txq_completion;
1360 }
1361
1362 if (data->input.rx_num_desc) {
1363 qed_int_register_cb(p_hwfn, comp_rx_cb,
1364 &p_hwfn->p_ll2_info[i],
1365 &p_ll2_info->rx_queue.rx_sb_index,
1366 &p_ll2_info->rx_queue.p_fw_cons);
1367 p_ll2_info->rx_queue.b_cb_registred = true;
1368 }
1369
1370 if (data->input.tx_num_desc) {
1371 qed_int_register_cb(p_hwfn,
1372 comp_tx_cb,
1373 &p_hwfn->p_ll2_info[i],
1374 &p_ll2_info->tx_queue.tx_sb_index,
1375 &p_ll2_info->tx_queue.p_fw_cons);
1376 p_ll2_info->tx_queue.b_cb_registred = true;
1377 }
1378
1379 *data->p_connection_handle = i;
1380 return rc;
1381
1382 q_allocate_fail:
1383 qed_ll2_release_connection(p_hwfn, i);
1384 return -ENOMEM;
1385 }
1386
1387 static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn,
1388 struct qed_ll2_info *p_ll2_conn)
1389 {
1390 enum qed_ll2_error_handle error_input;
1391 enum core_error_handle error_mode;
1392 u8 action_on_error = 0;
1393
1394 if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
1395 return 0;
1396
1397 DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0);
1398 error_input = p_ll2_conn->input.ai_err_packet_too_big;
1399 error_mode = qed_ll2_get_error_choice(error_input);
1400 SET_FIELD(action_on_error,
1401 CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, error_mode);
1402 error_input = p_ll2_conn->input.ai_err_no_buf;
1403 error_mode = qed_ll2_get_error_choice(error_input);
1404 SET_FIELD(action_on_error, CORE_RX_ACTION_ON_ERROR_NO_BUFF, error_mode);
1405
1406 return qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error);
1407 }
1408
1409 static void
1410 qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn,
1411 struct qed_ll2_info *p_ll2_conn)
1412 {
1413 if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
1414 return;
1415
1416 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1417 qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
1418 }
1419
1420 int qed_ll2_establish_connection(void *cxt, u8 connection_handle)
1421 {
1422 struct qed_hwfn *p_hwfn = cxt;
1423 struct qed_ll2_info *p_ll2_conn;
1424 struct qed_ll2_tx_packet *p_pkt;
1425 struct qed_ll2_rx_queue *p_rx;
1426 struct qed_ll2_tx_queue *p_tx;
1427 struct qed_ptt *p_ptt;
1428 int rc = -EINVAL;
1429 u32 i, capacity;
1430 u32 desc_size;
1431 u8 qid;
1432
1433 p_ptt = qed_ptt_acquire(p_hwfn);
1434 if (!p_ptt)
1435 return -EAGAIN;
1436
1437 p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1438 if (!p_ll2_conn) {
1439 rc = -EINVAL;
1440 goto out;
1441 }
1442
1443 p_rx = &p_ll2_conn->rx_queue;
1444 p_tx = &p_ll2_conn->tx_queue;
1445
1446 qed_chain_reset(&p_rx->rxq_chain);
1447 qed_chain_reset(&p_rx->rcq_chain);
1448 INIT_LIST_HEAD(&p_rx->active_descq);
1449 INIT_LIST_HEAD(&p_rx->free_descq);
1450 INIT_LIST_HEAD(&p_rx->posting_descq);
1451 spin_lock_init(&p_rx->lock);
1452 capacity = qed_chain_get_capacity(&p_rx->rxq_chain);
1453 for (i = 0; i < capacity; i++)
1454 list_add_tail(&p_rx->descq_array[i].list_entry,
1455 &p_rx->free_descq);
1456 *p_rx->p_fw_cons = 0;
1457
1458 qed_chain_reset(&p_tx->txq_chain);
1459 INIT_LIST_HEAD(&p_tx->active_descq);
1460 INIT_LIST_HEAD(&p_tx->free_descq);
1461 INIT_LIST_HEAD(&p_tx->sending_descq);
1462 spin_lock_init(&p_tx->lock);
1463 capacity = qed_chain_get_capacity(&p_tx->txq_chain);
1464 /* First element is part of the packet, rest are flexibly added */
1465 desc_size = (sizeof(*p_pkt) +
1466 (p_ll2_conn->input.tx_max_bds_per_packet - 1) *
1467 sizeof(p_pkt->bds_set));
1468
1469 for (i = 0; i < capacity; i++) {
1470 p_pkt = p_tx->descq_mem + desc_size * i;
1471 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
1472 }
1473 p_tx->cur_completing_bd_idx = 0;
1474 p_tx->bds_idx = 0;
1475 p_tx->b_completing_packet = false;
1476 p_tx->cur_send_packet = NULL;
1477 p_tx->cur_send_frag_num = 0;
1478 p_tx->cur_completing_frag_num = 0;
1479 *p_tx->p_fw_cons = 0;
1480
1481 rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid);
1482 if (rc)
1483 goto out;
1484
1485 qid = p_hwfn->hw_info.resc_start[QED_LL2_QUEUE] + connection_handle;
1486 p_ll2_conn->queue_id = qid;
1487 p_ll2_conn->tx_stats_id = qid;
1488 p_rx->set_prod_addr = (u8 __iomem *)p_hwfn->regview +
1489 GTT_BAR0_MAP_REG_TSDM_RAM +
1490 TSTORM_LL2_RX_PRODS_OFFSET(qid);
1491 p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells +
1492 qed_db_addr(p_ll2_conn->cid,
1493 DQ_DEMS_LEGACY);
1494
1495 rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn);
1496 if (rc)
1497 goto out;
1498
1499 rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn);
1500 if (rc)
1501 goto out;
1502
1503 if (!QED_IS_RDMA_PERSONALITY(p_hwfn))
1504 qed_wr(p_hwfn, p_ptt, PRS_REG_USE_LIGHT_L2, 1);
1505
1506 qed_ll2_establish_connection_ooo(p_hwfn, p_ll2_conn);
1507
1508 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1509 qed_llh_add_protocol_filter(p_hwfn, p_ptt,
1510 0x8906, 0,
1511 QED_LLH_FILTER_ETHERTYPE);
1512 qed_llh_add_protocol_filter(p_hwfn, p_ptt,
1513 0x8914, 0,
1514 QED_LLH_FILTER_ETHERTYPE);
1515 }
1516
1517 out:
1518 qed_ptt_release(p_hwfn, p_ptt);
1519 return rc;
1520 }
1521
1522 static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn,
1523 struct qed_ll2_rx_queue *p_rx,
1524 struct qed_ll2_rx_packet *p_curp)
1525 {
1526 struct qed_ll2_rx_packet *p_posting_packet = NULL;
1527 struct core_ll2_rx_prod rx_prod = { 0, 0, 0 };
1528 bool b_notify_fw = false;
1529 u16 bd_prod, cq_prod;
1530
1531 /* This handles the flushing of already posted buffers */
1532 while (!list_empty(&p_rx->posting_descq)) {
1533 p_posting_packet = list_first_entry(&p_rx->posting_descq,
1534 struct qed_ll2_rx_packet,
1535 list_entry);
1536 list_move_tail(&p_posting_packet->list_entry,
1537 &p_rx->active_descq);
1538 b_notify_fw = true;
1539 }
1540
1541 /* This handles the supplied packet [if there is one] */
1542 if (p_curp) {
1543 list_add_tail(&p_curp->list_entry, &p_rx->active_descq);
1544 b_notify_fw = true;
1545 }
1546
1547 if (!b_notify_fw)
1548 return;
1549
1550 bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain);
1551 cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain);
1552 rx_prod.bd_prod = cpu_to_le16(bd_prod);
1553 rx_prod.cqe_prod = cpu_to_le16(cq_prod);
1554 DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod));
1555 }
1556
1557 int qed_ll2_post_rx_buffer(void *cxt,
1558 u8 connection_handle,
1559 dma_addr_t addr,
1560 u16 buf_len, void *cookie, u8 notify_fw)
1561 {
1562 struct qed_hwfn *p_hwfn = cxt;
1563 struct core_rx_bd_with_buff_len *p_curb = NULL;
1564 struct qed_ll2_rx_packet *p_curp = NULL;
1565 struct qed_ll2_info *p_ll2_conn;
1566 struct qed_ll2_rx_queue *p_rx;
1567 unsigned long flags;
1568 void *p_data;
1569 int rc = 0;
1570
1571 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1572 if (!p_ll2_conn)
1573 return -EINVAL;
1574 p_rx = &p_ll2_conn->rx_queue;
1575
1576 spin_lock_irqsave(&p_rx->lock, flags);
1577 if (!list_empty(&p_rx->free_descq))
1578 p_curp = list_first_entry(&p_rx->free_descq,
1579 struct qed_ll2_rx_packet, list_entry);
1580 if (p_curp) {
1581 if (qed_chain_get_elem_left(&p_rx->rxq_chain) &&
1582 qed_chain_get_elem_left(&p_rx->rcq_chain)) {
1583 p_data = qed_chain_produce(&p_rx->rxq_chain);
1584 p_curb = (struct core_rx_bd_with_buff_len *)p_data;
1585 qed_chain_produce(&p_rx->rcq_chain);
1586 }
1587 }
1588
1589 /* If we're lacking entires, let's try to flush buffers to FW */
1590 if (!p_curp || !p_curb) {
1591 rc = -EBUSY;
1592 p_curp = NULL;
1593 goto out_notify;
1594 }
1595
1596 /* We have an Rx packet we can fill */
1597 DMA_REGPAIR_LE(p_curb->addr, addr);
1598 p_curb->buff_length = cpu_to_le16(buf_len);
1599 p_curp->rx_buf_addr = addr;
1600 p_curp->cookie = cookie;
1601 p_curp->rxq_bd = p_curb;
1602 p_curp->buf_length = buf_len;
1603 list_del(&p_curp->list_entry);
1604
1605 /* Check if we only want to enqueue this packet without informing FW */
1606 if (!notify_fw) {
1607 list_add_tail(&p_curp->list_entry, &p_rx->posting_descq);
1608 goto out;
1609 }
1610
1611 out_notify:
1612 qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp);
1613 out:
1614 spin_unlock_irqrestore(&p_rx->lock, flags);
1615 return rc;
1616 }
1617
1618 static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn,
1619 struct qed_ll2_tx_queue *p_tx,
1620 struct qed_ll2_tx_packet *p_curp,
1621 struct qed_ll2_tx_pkt_info *pkt,
1622 u8 notify_fw)
1623 {
1624 list_del(&p_curp->list_entry);
1625 p_curp->cookie = pkt->cookie;
1626 p_curp->bd_used = pkt->num_of_bds;
1627 p_curp->notify_fw = notify_fw;
1628 p_tx->cur_send_packet = p_curp;
1629 p_tx->cur_send_frag_num = 0;
1630
1631 p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = pkt->first_frag;
1632 p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = pkt->first_frag_len;
1633 p_tx->cur_send_frag_num++;
1634 }
1635
1636 static void
1637 qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn,
1638 struct qed_ll2_info *p_ll2,
1639 struct qed_ll2_tx_packet *p_curp,
1640 struct qed_ll2_tx_pkt_info *pkt)
1641 {
1642 struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain;
1643 u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain);
1644 struct core_tx_bd *start_bd = NULL;
1645 enum core_roce_flavor_type roce_flavor;
1646 enum core_tx_dest tx_dest;
1647 u16 bd_data = 0, frag_idx;
1648
1649 roce_flavor = (pkt->qed_roce_flavor == QED_LL2_ROCE) ? CORE_ROCE
1650 : CORE_RROCE;
1651
1652 switch (pkt->tx_dest) {
1653 case QED_LL2_TX_DEST_NW:
1654 tx_dest = CORE_TX_DEST_NW;
1655 break;
1656 case QED_LL2_TX_DEST_LB:
1657 tx_dest = CORE_TX_DEST_LB;
1658 break;
1659 case QED_LL2_TX_DEST_DROP:
1660 tx_dest = CORE_TX_DEST_DROP;
1661 break;
1662 default:
1663 tx_dest = CORE_TX_DEST_LB;
1664 break;
1665 }
1666
1667 start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1668 if (QED_IS_IWARP_PERSONALITY(p_hwfn) &&
1669 p_ll2->input.conn_type == QED_LL2_TYPE_OOO)
1670 start_bd->nw_vlan_or_lb_echo =
1671 cpu_to_le16(IWARP_LL2_IN_ORDER_TX_QUEUE);
1672 else
1673 start_bd->nw_vlan_or_lb_echo = cpu_to_le16(pkt->vlan);
1674 SET_FIELD(start_bd->bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W,
1675 cpu_to_le16(pkt->l4_hdr_offset_w));
1676 SET_FIELD(start_bd->bitfield1, CORE_TX_BD_TX_DST, tx_dest);
1677 bd_data |= pkt->bd_flags;
1678 SET_FIELD(bd_data, CORE_TX_BD_DATA_START_BD, 0x1);
1679 SET_FIELD(bd_data, CORE_TX_BD_DATA_NBDS, pkt->num_of_bds);
1680 SET_FIELD(bd_data, CORE_TX_BD_DATA_ROCE_FLAV, roce_flavor);
1681 SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_CSUM, !!(pkt->enable_ip_cksum));
1682 SET_FIELD(bd_data, CORE_TX_BD_DATA_L4_CSUM, !!(pkt->enable_l4_cksum));
1683 SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_LEN, !!(pkt->calc_ip_len));
1684 start_bd->bd_data.as_bitfield = cpu_to_le16(bd_data);
1685 DMA_REGPAIR_LE(start_bd->addr, pkt->first_frag);
1686 start_bd->nbytes = cpu_to_le16(pkt->first_frag_len);
1687
1688 DP_VERBOSE(p_hwfn,
1689 (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1690 "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Tx Producer at [0x%04x] - set with a %04x bytes %02x BDs buffer at %08x:%08x\n",
1691 p_ll2->queue_id,
1692 p_ll2->cid,
1693 p_ll2->input.conn_type,
1694 prod_idx,
1695 pkt->first_frag_len,
1696 pkt->num_of_bds,
1697 le32_to_cpu(start_bd->addr.hi),
1698 le32_to_cpu(start_bd->addr.lo));
1699
1700 if (p_ll2->tx_queue.cur_send_frag_num == pkt->num_of_bds)
1701 return;
1702
1703 /* Need to provide the packet with additional BDs for frags */
1704 for (frag_idx = p_ll2->tx_queue.cur_send_frag_num;
1705 frag_idx < pkt->num_of_bds; frag_idx++) {
1706 struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd;
1707
1708 *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1709 (*p_bd)->bd_data.as_bitfield = 0;
1710 (*p_bd)->bitfield1 = 0;
1711 p_curp->bds_set[frag_idx].tx_frag = 0;
1712 p_curp->bds_set[frag_idx].frag_len = 0;
1713 }
1714 }
1715
1716 /* This should be called while the Txq spinlock is being held */
1717 static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn,
1718 struct qed_ll2_info *p_ll2_conn)
1719 {
1720 bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw;
1721 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1722 struct qed_ll2_tx_packet *p_pkt = NULL;
1723 struct core_db_data db_msg = { 0, 0, 0 };
1724 u16 bd_prod;
1725
1726 /* If there are missing BDs, don't do anything now */
1727 if (p_ll2_conn->tx_queue.cur_send_frag_num !=
1728 p_ll2_conn->tx_queue.cur_send_packet->bd_used)
1729 return;
1730
1731 /* Push the current packet to the list and clean after it */
1732 list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry,
1733 &p_ll2_conn->tx_queue.sending_descq);
1734 p_ll2_conn->tx_queue.cur_send_packet = NULL;
1735 p_ll2_conn->tx_queue.cur_send_frag_num = 0;
1736
1737 /* Notify FW of packet only if requested to */
1738 if (!b_notify)
1739 return;
1740
1741 bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain);
1742
1743 while (!list_empty(&p_tx->sending_descq)) {
1744 p_pkt = list_first_entry(&p_tx->sending_descq,
1745 struct qed_ll2_tx_packet, list_entry);
1746 if (!p_pkt)
1747 break;
1748
1749 list_move_tail(&p_pkt->list_entry, &p_tx->active_descq);
1750 }
1751
1752 SET_FIELD(db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
1753 SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET);
1754 SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_VAL_SEL,
1755 DQ_XCM_CORE_TX_BD_PROD_CMD);
1756 db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
1757 db_msg.spq_prod = cpu_to_le16(bd_prod);
1758
1759 /* Make sure the BDs data is updated before ringing the doorbell */
1760 wmb();
1761
1762 DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&db_msg));
1763
1764 DP_VERBOSE(p_hwfn,
1765 (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1766 "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n",
1767 p_ll2_conn->queue_id,
1768 p_ll2_conn->cid,
1769 p_ll2_conn->input.conn_type, db_msg.spq_prod);
1770 }
1771
1772 int qed_ll2_prepare_tx_packet(void *cxt,
1773 u8 connection_handle,
1774 struct qed_ll2_tx_pkt_info *pkt,
1775 bool notify_fw)
1776 {
1777 struct qed_hwfn *p_hwfn = cxt;
1778 struct qed_ll2_tx_packet *p_curp = NULL;
1779 struct qed_ll2_info *p_ll2_conn = NULL;
1780 struct qed_ll2_tx_queue *p_tx;
1781 struct qed_chain *p_tx_chain;
1782 unsigned long flags;
1783 int rc = 0;
1784
1785 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1786 if (!p_ll2_conn)
1787 return -EINVAL;
1788 p_tx = &p_ll2_conn->tx_queue;
1789 p_tx_chain = &p_tx->txq_chain;
1790
1791 if (pkt->num_of_bds > p_ll2_conn->input.tx_max_bds_per_packet)
1792 return -EIO;
1793
1794 spin_lock_irqsave(&p_tx->lock, flags);
1795 if (p_tx->cur_send_packet) {
1796 rc = -EEXIST;
1797 goto out;
1798 }
1799
1800 /* Get entry, but only if we have tx elements for it */
1801 if (!list_empty(&p_tx->free_descq))
1802 p_curp = list_first_entry(&p_tx->free_descq,
1803 struct qed_ll2_tx_packet, list_entry);
1804 if (p_curp && qed_chain_get_elem_left(p_tx_chain) < pkt->num_of_bds)
1805 p_curp = NULL;
1806
1807 if (!p_curp) {
1808 rc = -EBUSY;
1809 goto out;
1810 }
1811
1812 /* Prepare packet and BD, and perhaps send a doorbell to FW */
1813 qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp, pkt, notify_fw);
1814
1815 qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp, pkt);
1816
1817 qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1818
1819 out:
1820 spin_unlock_irqrestore(&p_tx->lock, flags);
1821 return rc;
1822 }
1823
1824 int qed_ll2_set_fragment_of_tx_packet(void *cxt,
1825 u8 connection_handle,
1826 dma_addr_t addr, u16 nbytes)
1827 {
1828 struct qed_ll2_tx_packet *p_cur_send_packet = NULL;
1829 struct qed_hwfn *p_hwfn = cxt;
1830 struct qed_ll2_info *p_ll2_conn = NULL;
1831 u16 cur_send_frag_num = 0;
1832 struct core_tx_bd *p_bd;
1833 unsigned long flags;
1834
1835 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1836 if (!p_ll2_conn)
1837 return -EINVAL;
1838
1839 if (!p_ll2_conn->tx_queue.cur_send_packet)
1840 return -EINVAL;
1841
1842 p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet;
1843 cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num;
1844
1845 if (cur_send_frag_num >= p_cur_send_packet->bd_used)
1846 return -EINVAL;
1847
1848 /* Fill the BD information, and possibly notify FW */
1849 p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd;
1850 DMA_REGPAIR_LE(p_bd->addr, addr);
1851 p_bd->nbytes = cpu_to_le16(nbytes);
1852 p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr;
1853 p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes;
1854
1855 p_ll2_conn->tx_queue.cur_send_frag_num++;
1856
1857 spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags);
1858 qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1859 spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags);
1860
1861 return 0;
1862 }
1863
1864 int qed_ll2_terminate_connection(void *cxt, u8 connection_handle)
1865 {
1866 struct qed_hwfn *p_hwfn = cxt;
1867 struct qed_ll2_info *p_ll2_conn = NULL;
1868 int rc = -EINVAL;
1869 struct qed_ptt *p_ptt;
1870
1871 p_ptt = qed_ptt_acquire(p_hwfn);
1872 if (!p_ptt)
1873 return -EAGAIN;
1874
1875 p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1876 if (!p_ll2_conn) {
1877 rc = -EINVAL;
1878 goto out;
1879 }
1880
1881 /* Stop Tx & Rx of connection, if needed */
1882 if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
1883 rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn);
1884 if (rc)
1885 goto out;
1886 qed_ll2_txq_flush(p_hwfn, connection_handle);
1887 }
1888
1889 if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
1890 rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn);
1891 if (rc)
1892 goto out;
1893 qed_ll2_rxq_flush(p_hwfn, connection_handle);
1894 }
1895
1896 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
1897 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1898
1899 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1900 qed_llh_remove_protocol_filter(p_hwfn, p_ptt,
1901 0x8906, 0,
1902 QED_LLH_FILTER_ETHERTYPE);
1903 qed_llh_remove_protocol_filter(p_hwfn, p_ptt,
1904 0x8914, 0,
1905 QED_LLH_FILTER_ETHERTYPE);
1906 }
1907
1908 out:
1909 qed_ptt_release(p_hwfn, p_ptt);
1910 return rc;
1911 }
1912
1913 static void qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn,
1914 struct qed_ll2_info *p_ll2_conn)
1915 {
1916 struct qed_ooo_buffer *p_buffer;
1917
1918 if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
1919 return;
1920
1921 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1922 while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
1923 p_hwfn->p_ooo_info))) {
1924 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
1925 p_buffer->rx_buffer_size,
1926 p_buffer->rx_buffer_virt_addr,
1927 p_buffer->rx_buffer_phys_addr);
1928 kfree(p_buffer);
1929 }
1930 }
1931
1932 void qed_ll2_release_connection(void *cxt, u8 connection_handle)
1933 {
1934 struct qed_hwfn *p_hwfn = cxt;
1935 struct qed_ll2_info *p_ll2_conn = NULL;
1936
1937 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1938 if (!p_ll2_conn)
1939 return;
1940
1941 if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
1942 p_ll2_conn->rx_queue.b_cb_registred = false;
1943 qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index);
1944 }
1945
1946 if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
1947 p_ll2_conn->tx_queue.b_cb_registred = false;
1948 qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index);
1949 }
1950
1951 kfree(p_ll2_conn->tx_queue.descq_mem);
1952 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain);
1953
1954 kfree(p_ll2_conn->rx_queue.descq_array);
1955 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain);
1956 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain);
1957
1958 qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid);
1959
1960 qed_ll2_release_connection_ooo(p_hwfn, p_ll2_conn);
1961
1962 mutex_lock(&p_ll2_conn->mutex);
1963 p_ll2_conn->b_active = false;
1964 mutex_unlock(&p_ll2_conn->mutex);
1965 }
1966
1967 int qed_ll2_alloc(struct qed_hwfn *p_hwfn)
1968 {
1969 struct qed_ll2_info *p_ll2_connections;
1970 u8 i;
1971
1972 /* Allocate LL2's set struct */
1973 p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS,
1974 sizeof(struct qed_ll2_info), GFP_KERNEL);
1975 if (!p_ll2_connections) {
1976 DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n");
1977 return -ENOMEM;
1978 }
1979
1980 for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
1981 p_ll2_connections[i].my_id = i;
1982
1983 p_hwfn->p_ll2_info = p_ll2_connections;
1984 return 0;
1985 }
1986
1987 void qed_ll2_setup(struct qed_hwfn *p_hwfn)
1988 {
1989 int i;
1990
1991 for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
1992 mutex_init(&p_hwfn->p_ll2_info[i].mutex);
1993 }
1994
1995 void qed_ll2_free(struct qed_hwfn *p_hwfn)
1996 {
1997 if (!p_hwfn->p_ll2_info)
1998 return;
1999
2000 kfree(p_hwfn->p_ll2_info);
2001 p_hwfn->p_ll2_info = NULL;
2002 }
2003
2004 static void _qed_ll2_get_port_stats(struct qed_hwfn *p_hwfn,
2005 struct qed_ptt *p_ptt,
2006 struct qed_ll2_stats *p_stats)
2007 {
2008 struct core_ll2_port_stats port_stats;
2009
2010 memset(&port_stats, 0, sizeof(port_stats));
2011 qed_memcpy_from(p_hwfn, p_ptt, &port_stats,
2012 BAR0_MAP_REG_TSDM_RAM +
2013 TSTORM_LL2_PORT_STAT_OFFSET(MFW_PORT(p_hwfn)),
2014 sizeof(port_stats));
2015
2016 p_stats->gsi_invalid_hdr = HILO_64_REGPAIR(port_stats.gsi_invalid_hdr);
2017 p_stats->gsi_invalid_pkt_length =
2018 HILO_64_REGPAIR(port_stats.gsi_invalid_pkt_length);
2019 p_stats->gsi_unsupported_pkt_typ =
2020 HILO_64_REGPAIR(port_stats.gsi_unsupported_pkt_typ);
2021 p_stats->gsi_crcchksm_error =
2022 HILO_64_REGPAIR(port_stats.gsi_crcchksm_error);
2023 }
2024
2025 static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn,
2026 struct qed_ptt *p_ptt,
2027 struct qed_ll2_info *p_ll2_conn,
2028 struct qed_ll2_stats *p_stats)
2029 {
2030 struct core_ll2_tstorm_per_queue_stat tstats;
2031 u8 qid = p_ll2_conn->queue_id;
2032 u32 tstats_addr;
2033
2034 memset(&tstats, 0, sizeof(tstats));
2035 tstats_addr = BAR0_MAP_REG_TSDM_RAM +
2036 CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid);
2037 qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
2038
2039 p_stats->packet_too_big_discard =
2040 HILO_64_REGPAIR(tstats.packet_too_big_discard);
2041 p_stats->no_buff_discard = HILO_64_REGPAIR(tstats.no_buff_discard);
2042 }
2043
2044 static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn,
2045 struct qed_ptt *p_ptt,
2046 struct qed_ll2_info *p_ll2_conn,
2047 struct qed_ll2_stats *p_stats)
2048 {
2049 struct core_ll2_ustorm_per_queue_stat ustats;
2050 u8 qid = p_ll2_conn->queue_id;
2051 u32 ustats_addr;
2052
2053 memset(&ustats, 0, sizeof(ustats));
2054 ustats_addr = BAR0_MAP_REG_USDM_RAM +
2055 CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid);
2056 qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
2057
2058 p_stats->rcv_ucast_bytes = HILO_64_REGPAIR(ustats.rcv_ucast_bytes);
2059 p_stats->rcv_mcast_bytes = HILO_64_REGPAIR(ustats.rcv_mcast_bytes);
2060 p_stats->rcv_bcast_bytes = HILO_64_REGPAIR(ustats.rcv_bcast_bytes);
2061 p_stats->rcv_ucast_pkts = HILO_64_REGPAIR(ustats.rcv_ucast_pkts);
2062 p_stats->rcv_mcast_pkts = HILO_64_REGPAIR(ustats.rcv_mcast_pkts);
2063 p_stats->rcv_bcast_pkts = HILO_64_REGPAIR(ustats.rcv_bcast_pkts);
2064 }
2065
2066 static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn,
2067 struct qed_ptt *p_ptt,
2068 struct qed_ll2_info *p_ll2_conn,
2069 struct qed_ll2_stats *p_stats)
2070 {
2071 struct core_ll2_pstorm_per_queue_stat pstats;
2072 u8 stats_id = p_ll2_conn->tx_stats_id;
2073 u32 pstats_addr;
2074
2075 memset(&pstats, 0, sizeof(pstats));
2076 pstats_addr = BAR0_MAP_REG_PSDM_RAM +
2077 CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id);
2078 qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
2079
2080 p_stats->sent_ucast_bytes = HILO_64_REGPAIR(pstats.sent_ucast_bytes);
2081 p_stats->sent_mcast_bytes = HILO_64_REGPAIR(pstats.sent_mcast_bytes);
2082 p_stats->sent_bcast_bytes = HILO_64_REGPAIR(pstats.sent_bcast_bytes);
2083 p_stats->sent_ucast_pkts = HILO_64_REGPAIR(pstats.sent_ucast_pkts);
2084 p_stats->sent_mcast_pkts = HILO_64_REGPAIR(pstats.sent_mcast_pkts);
2085 p_stats->sent_bcast_pkts = HILO_64_REGPAIR(pstats.sent_bcast_pkts);
2086 }
2087
2088 int qed_ll2_get_stats(void *cxt,
2089 u8 connection_handle, struct qed_ll2_stats *p_stats)
2090 {
2091 struct qed_hwfn *p_hwfn = cxt;
2092 struct qed_ll2_info *p_ll2_conn = NULL;
2093 struct qed_ptt *p_ptt;
2094
2095 memset(p_stats, 0, sizeof(*p_stats));
2096
2097 if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) ||
2098 !p_hwfn->p_ll2_info)
2099 return -EINVAL;
2100
2101 p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
2102
2103 p_ptt = qed_ptt_acquire(p_hwfn);
2104 if (!p_ptt) {
2105 DP_ERR(p_hwfn, "Failed to acquire ptt\n");
2106 return -EINVAL;
2107 }
2108
2109 if (p_ll2_conn->input.gsi_enable)
2110 _qed_ll2_get_port_stats(p_hwfn, p_ptt, p_stats);
2111 _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2112 _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2113 if (p_ll2_conn->tx_stats_en)
2114 _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2115
2116 qed_ptt_release(p_hwfn, p_ptt);
2117 return 0;
2118 }
2119
2120 static void qed_ll2b_release_rx_packet(void *cxt,
2121 u8 connection_handle,
2122 void *cookie,
2123 dma_addr_t rx_buf_addr,
2124 bool b_last_packet)
2125 {
2126 struct qed_hwfn *p_hwfn = cxt;
2127
2128 qed_ll2_dealloc_buffer(p_hwfn->cdev, cookie);
2129 }
2130
2131 static void qed_ll2_register_cb_ops(struct qed_dev *cdev,
2132 const struct qed_ll2_cb_ops *ops,
2133 void *cookie)
2134 {
2135 cdev->ll2->cbs = ops;
2136 cdev->ll2->cb_cookie = cookie;
2137 }
2138
2139 struct qed_ll2_cbs ll2_cbs = {
2140 .rx_comp_cb = &qed_ll2b_complete_rx_packet,
2141 .rx_release_cb = &qed_ll2b_release_rx_packet,
2142 .tx_comp_cb = &qed_ll2b_complete_tx_packet,
2143 .tx_release_cb = &qed_ll2b_complete_tx_packet,
2144 };
2145
2146 static void qed_ll2_set_conn_data(struct qed_dev *cdev,
2147 struct qed_ll2_acquire_data *data,
2148 struct qed_ll2_params *params,
2149 enum qed_ll2_conn_type conn_type,
2150 u8 *handle, bool lb)
2151 {
2152 memset(data, 0, sizeof(*data));
2153
2154 data->input.conn_type = conn_type;
2155 data->input.mtu = params->mtu;
2156 data->input.rx_num_desc = QED_LL2_RX_SIZE;
2157 data->input.rx_drop_ttl0_flg = params->drop_ttl0_packets;
2158 data->input.rx_vlan_removal_en = params->rx_vlan_stripping;
2159 data->input.tx_num_desc = QED_LL2_TX_SIZE;
2160 data->p_connection_handle = handle;
2161 data->cbs = &ll2_cbs;
2162 ll2_cbs.cookie = QED_LEADING_HWFN(cdev);
2163
2164 if (lb) {
2165 data->input.tx_tc = PKT_LB_TC;
2166 data->input.tx_dest = QED_LL2_TX_DEST_LB;
2167 } else {
2168 data->input.tx_tc = 0;
2169 data->input.tx_dest = QED_LL2_TX_DEST_NW;
2170 }
2171 }
2172
2173 static int qed_ll2_start_ooo(struct qed_dev *cdev,
2174 struct qed_ll2_params *params)
2175 {
2176 struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
2177 u8 *handle = &hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
2178 struct qed_ll2_acquire_data data;
2179 int rc;
2180
2181 qed_ll2_set_conn_data(cdev, &data, params,
2182 QED_LL2_TYPE_OOO, handle, true);
2183
2184 rc = qed_ll2_acquire_connection(hwfn, &data);
2185 if (rc) {
2186 DP_INFO(cdev, "Failed to acquire LL2 OOO connection\n");
2187 goto out;
2188 }
2189
2190 rc = qed_ll2_establish_connection(hwfn, *handle);
2191 if (rc) {
2192 DP_INFO(cdev, "Failed to establist LL2 OOO connection\n");
2193 goto fail;
2194 }
2195
2196 return 0;
2197
2198 fail:
2199 qed_ll2_release_connection(hwfn, *handle);
2200 out:
2201 *handle = QED_LL2_UNUSED_HANDLE;
2202 return rc;
2203 }
2204
2205 static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params)
2206 {
2207 struct qed_ll2_buffer *buffer, *tmp_buffer;
2208 enum qed_ll2_conn_type conn_type;
2209 struct qed_ll2_acquire_data data;
2210 struct qed_ptt *p_ptt;
2211 int rc, i;
2212
2213
2214 /* Initialize LL2 locks & lists */
2215 INIT_LIST_HEAD(&cdev->ll2->list);
2216 spin_lock_init(&cdev->ll2->lock);
2217 cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN +
2218 L1_CACHE_BYTES + params->mtu;
2219
2220 /*Allocate memory for LL2 */
2221 DP_INFO(cdev, "Allocating LL2 buffers of size %08x bytes\n",
2222 cdev->ll2->rx_size);
2223 for (i = 0; i < QED_LL2_RX_SIZE; i++) {
2224 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
2225 if (!buffer) {
2226 DP_INFO(cdev, "Failed to allocate LL2 buffers\n");
2227 goto fail;
2228 }
2229
2230 rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data,
2231 &buffer->phys_addr);
2232 if (rc) {
2233 kfree(buffer);
2234 goto fail;
2235 }
2236
2237 list_add_tail(&buffer->list, &cdev->ll2->list);
2238 }
2239
2240 switch (QED_LEADING_HWFN(cdev)->hw_info.personality) {
2241 case QED_PCI_FCOE:
2242 conn_type = QED_LL2_TYPE_FCOE;
2243 break;
2244 case QED_PCI_ISCSI:
2245 conn_type = QED_LL2_TYPE_ISCSI;
2246 break;
2247 case QED_PCI_ETH_ROCE:
2248 conn_type = QED_LL2_TYPE_ROCE;
2249 break;
2250 default:
2251 conn_type = QED_LL2_TYPE_TEST;
2252 }
2253
2254 qed_ll2_set_conn_data(cdev, &data, params, conn_type,
2255 &cdev->ll2->handle, false);
2256
2257 rc = qed_ll2_acquire_connection(QED_LEADING_HWFN(cdev), &data);
2258 if (rc) {
2259 DP_INFO(cdev, "Failed to acquire LL2 connection\n");
2260 goto fail;
2261 }
2262
2263 rc = qed_ll2_establish_connection(QED_LEADING_HWFN(cdev),
2264 cdev->ll2->handle);
2265 if (rc) {
2266 DP_INFO(cdev, "Failed to establish LL2 connection\n");
2267 goto release_fail;
2268 }
2269
2270 /* Post all Rx buffers to FW */
2271 spin_lock_bh(&cdev->ll2->lock);
2272 list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) {
2273 rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev),
2274 cdev->ll2->handle,
2275 buffer->phys_addr, 0, buffer, 1);
2276 if (rc) {
2277 DP_INFO(cdev,
2278 "Failed to post an Rx buffer; Deleting it\n");
2279 dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
2280 cdev->ll2->rx_size, DMA_FROM_DEVICE);
2281 kfree(buffer->data);
2282 list_del(&buffer->list);
2283 kfree(buffer);
2284 } else {
2285 cdev->ll2->rx_cnt++;
2286 }
2287 }
2288 spin_unlock_bh(&cdev->ll2->lock);
2289
2290 if (!cdev->ll2->rx_cnt) {
2291 DP_INFO(cdev, "Failed passing even a single Rx buffer\n");
2292 goto release_terminate;
2293 }
2294
2295 if (!is_valid_ether_addr(params->ll2_mac_address)) {
2296 DP_INFO(cdev, "Invalid Ethernet address\n");
2297 goto release_terminate;
2298 }
2299
2300 if (QED_LEADING_HWFN(cdev)->hw_info.personality == QED_PCI_ISCSI) {
2301 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Starting OOO LL2 queue\n");
2302 rc = qed_ll2_start_ooo(cdev, params);
2303 if (rc) {
2304 DP_INFO(cdev,
2305 "Failed to initialize the OOO LL2 queue\n");
2306 goto release_terminate;
2307 }
2308 }
2309
2310 p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
2311 if (!p_ptt) {
2312 DP_INFO(cdev, "Failed to acquire PTT\n");
2313 goto release_terminate;
2314 }
2315
2316 rc = qed_llh_add_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
2317 params->ll2_mac_address);
2318 qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
2319 if (rc) {
2320 DP_ERR(cdev, "Failed to allocate LLH filter\n");
2321 goto release_terminate_all;
2322 }
2323
2324 ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address);
2325 return 0;
2326
2327 release_terminate_all:
2328
2329 release_terminate:
2330 qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2331 release_fail:
2332 qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2333 fail:
2334 qed_ll2_kill_buffers(cdev);
2335 cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2336 return -EINVAL;
2337 }
2338
2339 static int qed_ll2_stop(struct qed_dev *cdev)
2340 {
2341 struct qed_ptt *p_ptt;
2342 int rc;
2343
2344 if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE)
2345 return 0;
2346
2347 p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
2348 if (!p_ptt) {
2349 DP_INFO(cdev, "Failed to acquire PTT\n");
2350 goto fail;
2351 }
2352
2353 qed_llh_remove_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
2354 cdev->ll2_mac_address);
2355 qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
2356 eth_zero_addr(cdev->ll2_mac_address);
2357
2358 if (QED_LEADING_HWFN(cdev)->hw_info.personality == QED_PCI_ISCSI)
2359 qed_ll2_stop_ooo(cdev);
2360
2361 rc = qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev),
2362 cdev->ll2->handle);
2363 if (rc)
2364 DP_INFO(cdev, "Failed to terminate LL2 connection\n");
2365
2366 qed_ll2_kill_buffers(cdev);
2367
2368 qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
2369 cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2370
2371 return rc;
2372 fail:
2373 return -EINVAL;
2374 }
2375
2376 static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb)
2377 {
2378 struct qed_ll2_tx_pkt_info pkt;
2379 const skb_frag_t *frag;
2380 int rc = -EINVAL, i;
2381 dma_addr_t mapping;
2382 u16 vlan = 0;
2383 u8 flags = 0;
2384
2385 if (unlikely(skb->ip_summed != CHECKSUM_NONE)) {
2386 DP_INFO(cdev, "Cannot transmit a checksumed packet\n");
2387 return -EINVAL;
2388 }
2389
2390 if (1 + skb_shinfo(skb)->nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET) {
2391 DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n",
2392 1 + skb_shinfo(skb)->nr_frags);
2393 return -EINVAL;
2394 }
2395
2396 mapping = dma_map_single(&cdev->pdev->dev, skb->data,
2397 skb->len, DMA_TO_DEVICE);
2398 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2399 DP_NOTICE(cdev, "SKB mapping failed\n");
2400 return -EINVAL;
2401 }
2402
2403 /* Request HW to calculate IP csum */
2404 if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) &&
2405 ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
2406 flags |= BIT(CORE_TX_BD_DATA_IP_CSUM_SHIFT);
2407
2408 if (skb_vlan_tag_present(skb)) {
2409 vlan = skb_vlan_tag_get(skb);
2410 flags |= BIT(CORE_TX_BD_DATA_VLAN_INSERTION_SHIFT);
2411 }
2412
2413 memset(&pkt, 0, sizeof(pkt));
2414 pkt.num_of_bds = 1 + skb_shinfo(skb)->nr_frags;
2415 pkt.vlan = vlan;
2416 pkt.bd_flags = flags;
2417 pkt.tx_dest = QED_LL2_TX_DEST_NW;
2418 pkt.first_frag = mapping;
2419 pkt.first_frag_len = skb->len;
2420 pkt.cookie = skb;
2421
2422 rc = qed_ll2_prepare_tx_packet(&cdev->hwfns[0], cdev->ll2->handle,
2423 &pkt, 1);
2424 if (rc)
2425 goto err;
2426
2427 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
2428 frag = &skb_shinfo(skb)->frags[i];
2429
2430 mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0,
2431 skb_frag_size(frag), DMA_TO_DEVICE);
2432
2433 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2434 DP_NOTICE(cdev,
2435 "Unable to map frag - dropping packet\n");
2436 goto err;
2437 }
2438
2439 rc = qed_ll2_set_fragment_of_tx_packet(QED_LEADING_HWFN(cdev),
2440 cdev->ll2->handle,
2441 mapping,
2442 skb_frag_size(frag));
2443
2444 /* if failed not much to do here, partial packet has been posted
2445 * we can't free memory, will need to wait for completion.
2446 */
2447 if (rc)
2448 goto err2;
2449 }
2450
2451 return 0;
2452
2453 err:
2454 dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE);
2455
2456 err2:
2457 return rc;
2458 }
2459
2460 static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats)
2461 {
2462 if (!cdev->ll2)
2463 return -EINVAL;
2464
2465 return qed_ll2_get_stats(QED_LEADING_HWFN(cdev),
2466 cdev->ll2->handle, stats);
2467 }
2468
2469 const struct qed_ll2_ops qed_ll2_ops_pass = {
2470 .start = &qed_ll2_start,
2471 .stop = &qed_ll2_stop,
2472 .start_xmit = &qed_ll2_start_xmit,
2473 .register_cb_ops = &qed_ll2_register_cb_ops,
2474 .get_stats = &qed_ll2_stats,
2475 };
2476
2477 int qed_ll2_alloc_if(struct qed_dev *cdev)
2478 {
2479 cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL);
2480 return cdev->ll2 ? 0 : -ENOMEM;
2481 }
2482
2483 void qed_ll2_dealloc_if(struct qed_dev *cdev)
2484 {
2485 kfree(cdev->ll2);
2486 cdev->ll2 = NULL;
2487 }
Linux with added FPC-III support