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6
7#include <linux/types.h>
8#include <asm/byteorder.h>
9#include <linux/dma-mapping.h>
10#include <linux/if_vlan.h>
11#include <linux/kernel.h>
12#include <linux/pci.h>
13#include <linux/slab.h>
14#include <linux/stddef.h>
15#include <linux/workqueue.h>
16#include <net/ipv6.h>
17#include <linux/bitops.h>
18#include <linux/delay.h>
19#include <linux/errno.h>
20#include <linux/etherdevice.h>
21#include <linux/io.h>
22#include <linux/list.h>
23#include <linux/mutex.h>
24#include <linux/spinlock.h>
25#include <linux/string.h>
26#include <linux/qed/qed_ll2_if.h>
27#include "qed.h"
28#include "qed_cxt.h"
29#include "qed_dev_api.h"
30#include "qed_hsi.h"
31#include "qed_hw.h"
32#include "qed_int.h"
33#include "qed_ll2.h"
34#include "qed_mcp.h"
35#include "qed_ooo.h"
36#include "qed_reg_addr.h"
37#include "qed_sp.h"
38#include "qed_rdma.h"
39
40#define QED_LL2_RX_REGISTERED(ll2) ((ll2)->rx_queue.b_cb_registered)
41#define QED_LL2_TX_REGISTERED(ll2) ((ll2)->tx_queue.b_cb_registered)
42
43#define QED_LL2_TX_SIZE (256)
44#define QED_LL2_RX_SIZE (4096)
45
46struct qed_cb_ll2_info {
47 int rx_cnt;
48 u32 rx_size;
49 u8 handle;
50
51
52 spinlock_t lock;
53 struct list_head list;
54
55 const struct qed_ll2_cb_ops *cbs;
56 void *cb_cookie;
57};
58
59struct qed_ll2_buffer {
60 struct list_head list;
61 void *data;
62 dma_addr_t phys_addr;
63};
64
65static void qed_ll2b_complete_tx_packet(void *cxt,
66 u8 connection_handle,
67 void *cookie,
68 dma_addr_t first_frag_addr,
69 bool b_last_fragment,
70 bool b_last_packet)
71{
72 struct qed_hwfn *p_hwfn = cxt;
73 struct qed_dev *cdev = p_hwfn->cdev;
74 struct sk_buff *skb = cookie;
75
76
77 dma_unmap_single(&p_hwfn->cdev->pdev->dev, first_frag_addr,
78 skb_headlen(skb), DMA_TO_DEVICE);
79
80 if (cdev->ll2->cbs && cdev->ll2->cbs->tx_cb)
81 cdev->ll2->cbs->tx_cb(cdev->ll2->cb_cookie, skb,
82 b_last_fragment);
83
84 dev_kfree_skb_any(skb);
85}
86
87static int qed_ll2_alloc_buffer(struct qed_dev *cdev,
88 u8 **data, dma_addr_t *phys_addr)
89{
90 *data = kmalloc(cdev->ll2->rx_size, GFP_ATOMIC);
91 if (!(*data)) {
92 DP_INFO(cdev, "Failed to allocate LL2 buffer data\n");
93 return -ENOMEM;
94 }
95
96 *phys_addr = dma_map_single(&cdev->pdev->dev,
97 ((*data) + NET_SKB_PAD),
98 cdev->ll2->rx_size, DMA_FROM_DEVICE);
99 if (dma_mapping_error(&cdev->pdev->dev, *phys_addr)) {
100 DP_INFO(cdev, "Failed to map LL2 buffer data\n");
101 kfree((*data));
102 return -ENOMEM;
103 }
104
105 return 0;
106}
107
108static int qed_ll2_dealloc_buffer(struct qed_dev *cdev,
109 struct qed_ll2_buffer *buffer)
110{
111 spin_lock_bh(&cdev->ll2->lock);
112
113 dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
114 cdev->ll2->rx_size, DMA_FROM_DEVICE);
115 kfree(buffer->data);
116 list_del(&buffer->list);
117
118 cdev->ll2->rx_cnt--;
119 if (!cdev->ll2->rx_cnt)
120 DP_INFO(cdev, "All LL2 entries were removed\n");
121
122 spin_unlock_bh(&cdev->ll2->lock);
123
124 return 0;
125}
126
127static void qed_ll2_kill_buffers(struct qed_dev *cdev)
128{
129 struct qed_ll2_buffer *buffer, *tmp_buffer;
130
131 list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list)
132 qed_ll2_dealloc_buffer(cdev, buffer);
133}
134
135static void qed_ll2b_complete_rx_packet(void *cxt,
136 struct qed_ll2_comp_rx_data *data)
137{
138 struct qed_hwfn *p_hwfn = cxt;
139 struct qed_ll2_buffer *buffer = data->cookie;
140 struct qed_dev *cdev = p_hwfn->cdev;
141 dma_addr_t new_phys_addr;
142 struct sk_buff *skb;
143 bool reuse = false;
144 int rc = -EINVAL;
145 u8 *new_data;
146
147 DP_VERBOSE(p_hwfn,
148 (NETIF_MSG_RX_STATUS | QED_MSG_STORAGE | NETIF_MSG_PKTDATA),
149 "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",
150 (u64)data->rx_buf_addr,
151 data->u.placement_offset,
152 data->length.packet_length,
153 data->parse_flags,
154 data->vlan, data->opaque_data_0, data->opaque_data_1);
155
156 if ((cdev->dp_module & NETIF_MSG_PKTDATA) && buffer->data) {
157 print_hex_dump(KERN_INFO, "",
158 DUMP_PREFIX_OFFSET, 16, 1,
159 buffer->data, data->length.packet_length, false);
160 }
161
162
163 if (data->length.packet_length < ETH_HLEN)
164 reuse = true;
165
166
167 if (!reuse)
168 rc = qed_ll2_alloc_buffer(p_hwfn->cdev, &new_data,
169 &new_phys_addr);
170
171
172 if (rc)
173 goto out_post;
174 dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
175 cdev->ll2->rx_size, DMA_FROM_DEVICE);
176
177 skb = build_skb(buffer->data, 0);
178 if (!skb) {
179 DP_INFO(cdev, "Failed to build SKB\n");
180 kfree(buffer->data);
181 goto out_post1;
182 }
183
184 data->u.placement_offset += NET_SKB_PAD;
185 skb_reserve(skb, data->u.placement_offset);
186 skb_put(skb, data->length.packet_length);
187 skb_checksum_none_assert(skb);
188
189
190
191
192 skb_reset_mac_header(skb);
193 skb->protocol = eth_hdr(skb)->h_proto;
194
195
196 if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) {
197 if (data->vlan)
198 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
199 data->vlan);
200 cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb,
201 data->opaque_data_0,
202 data->opaque_data_1);
203 } else {
204 DP_VERBOSE(p_hwfn, (NETIF_MSG_RX_STATUS | NETIF_MSG_PKTDATA |
205 QED_MSG_LL2 | QED_MSG_STORAGE),
206 "Dropping the packet\n");
207 kfree(buffer->data);
208 }
209
210out_post1:
211
212 buffer->data = new_data;
213 buffer->phys_addr = new_phys_addr;
214
215out_post:
216 rc = qed_ll2_post_rx_buffer(p_hwfn, cdev->ll2->handle,
217 buffer->phys_addr, 0, buffer, 1);
218 if (rc)
219 qed_ll2_dealloc_buffer(cdev, buffer);
220}
221
222static struct qed_ll2_info *__qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
223 u8 connection_handle,
224 bool b_lock,
225 bool b_only_active)
226{
227 struct qed_ll2_info *p_ll2_conn, *p_ret = NULL;
228
229 if (connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS)
230 return NULL;
231
232 if (!p_hwfn->p_ll2_info)
233 return NULL;
234
235 p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
236
237 if (b_only_active) {
238 if (b_lock)
239 mutex_lock(&p_ll2_conn->mutex);
240 if (p_ll2_conn->b_active)
241 p_ret = p_ll2_conn;
242 if (b_lock)
243 mutex_unlock(&p_ll2_conn->mutex);
244 } else {
245 p_ret = p_ll2_conn;
246 }
247
248 return p_ret;
249}
250
251static struct qed_ll2_info *qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
252 u8 connection_handle)
253{
254 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, true);
255}
256
257static struct qed_ll2_info *qed_ll2_handle_sanity_lock(struct qed_hwfn *p_hwfn,
258 u8 connection_handle)
259{
260 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, true, true);
261}
262
263static struct qed_ll2_info *qed_ll2_handle_sanity_inactive(struct qed_hwfn
264 *p_hwfn,
265 u8 connection_handle)
266{
267 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, false);
268}
269
270static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
271{
272 bool b_last_packet = false, b_last_frag = false;
273 struct qed_ll2_tx_packet *p_pkt = NULL;
274 struct qed_ll2_info *p_ll2_conn;
275 struct qed_ll2_tx_queue *p_tx;
276 unsigned long flags = 0;
277 dma_addr_t tx_frag;
278
279 p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
280 if (!p_ll2_conn)
281 return;
282
283 p_tx = &p_ll2_conn->tx_queue;
284
285 spin_lock_irqsave(&p_tx->lock, flags);
286 while (!list_empty(&p_tx->active_descq)) {
287 p_pkt = list_first_entry(&p_tx->active_descq,
288 struct qed_ll2_tx_packet, list_entry);
289 if (!p_pkt)
290 break;
291
292 list_del(&p_pkt->list_entry);
293 b_last_packet = list_empty(&p_tx->active_descq);
294 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
295 spin_unlock_irqrestore(&p_tx->lock, flags);
296 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
297 struct qed_ooo_buffer *p_buffer;
298
299 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
300 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
301 p_buffer);
302 } else {
303 p_tx->cur_completing_packet = *p_pkt;
304 p_tx->cur_completing_bd_idx = 1;
305 b_last_frag =
306 p_tx->cur_completing_bd_idx == p_pkt->bd_used;
307 tx_frag = p_pkt->bds_set[0].tx_frag;
308 p_ll2_conn->cbs.tx_release_cb(p_ll2_conn->cbs.cookie,
309 p_ll2_conn->my_id,
310 p_pkt->cookie,
311 tx_frag,
312 b_last_frag,
313 b_last_packet);
314 }
315 spin_lock_irqsave(&p_tx->lock, flags);
316 }
317 spin_unlock_irqrestore(&p_tx->lock, flags);
318}
319
320static int qed_ll2_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
321{
322 struct qed_ll2_info *p_ll2_conn = p_cookie;
323 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
324 u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0;
325 struct qed_ll2_tx_packet *p_pkt;
326 bool b_last_frag = false;
327 unsigned long flags;
328 int rc = -EINVAL;
329
330 spin_lock_irqsave(&p_tx->lock, flags);
331 if (p_tx->b_completing_packet) {
332 rc = -EBUSY;
333 goto out;
334 }
335
336 new_idx = le16_to_cpu(*p_tx->p_fw_cons);
337 num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
338 while (num_bds) {
339 if (list_empty(&p_tx->active_descq))
340 goto out;
341
342 p_pkt = list_first_entry(&p_tx->active_descq,
343 struct qed_ll2_tx_packet, list_entry);
344 if (!p_pkt)
345 goto out;
346
347 p_tx->b_completing_packet = true;
348 p_tx->cur_completing_packet = *p_pkt;
349 num_bds_in_packet = p_pkt->bd_used;
350 list_del(&p_pkt->list_entry);
351
352 if (num_bds < num_bds_in_packet) {
353 DP_NOTICE(p_hwfn,
354 "Rest of BDs does not cover whole packet\n");
355 goto out;
356 }
357
358 num_bds -= num_bds_in_packet;
359 p_tx->bds_idx += num_bds_in_packet;
360 while (num_bds_in_packet--)
361 qed_chain_consume(&p_tx->txq_chain);
362
363 p_tx->cur_completing_bd_idx = 1;
364 b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used;
365 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
366
367 spin_unlock_irqrestore(&p_tx->lock, flags);
368
369 p_ll2_conn->cbs.tx_comp_cb(p_ll2_conn->cbs.cookie,
370 p_ll2_conn->my_id,
371 p_pkt->cookie,
372 p_pkt->bds_set[0].tx_frag,
373 b_last_frag, !num_bds);
374
375 spin_lock_irqsave(&p_tx->lock, flags);
376 }
377
378 p_tx->b_completing_packet = false;
379 rc = 0;
380out:
381 spin_unlock_irqrestore(&p_tx->lock, flags);
382 return rc;
383}
384
385static void qed_ll2_rxq_parse_gsi(struct qed_hwfn *p_hwfn,
386 union core_rx_cqe_union *p_cqe,
387 struct qed_ll2_comp_rx_data *data)
388{
389 data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_gsi.parse_flags.flags);
390 data->length.data_length = le16_to_cpu(p_cqe->rx_cqe_gsi.data_length);
391 data->vlan = le16_to_cpu(p_cqe->rx_cqe_gsi.vlan);
392 data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrhi);
393 data->opaque_data_1 = le16_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrlo);
394 data->u.data_length_error = p_cqe->rx_cqe_gsi.data_length_error;
395 data->qp_id = le16_to_cpu(p_cqe->rx_cqe_gsi.qp_id);
396
397 data->src_qp = le32_to_cpu(p_cqe->rx_cqe_gsi.src_qp);
398}
399
400static void qed_ll2_rxq_parse_reg(struct qed_hwfn *p_hwfn,
401 union core_rx_cqe_union *p_cqe,
402 struct qed_ll2_comp_rx_data *data)
403{
404 data->parse_flags = le16_to_cpu(p_cqe->rx_cqe_fp.parse_flags.flags);
405 data->err_flags = le16_to_cpu(p_cqe->rx_cqe_fp.err_flags.flags);
406 data->length.packet_length =
407 le16_to_cpu(p_cqe->rx_cqe_fp.packet_length);
408 data->vlan = le16_to_cpu(p_cqe->rx_cqe_fp.vlan);
409 data->opaque_data_0 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[0]);
410 data->opaque_data_1 = le32_to_cpu(p_cqe->rx_cqe_fp.opaque_data.data[1]);
411 data->u.placement_offset = p_cqe->rx_cqe_fp.placement_offset;
412}
413
414static int
415qed_ll2_handle_slowpath(struct qed_hwfn *p_hwfn,
416 struct qed_ll2_info *p_ll2_conn,
417 union core_rx_cqe_union *p_cqe,
418 unsigned long *p_lock_flags)
419{
420 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
421 struct core_rx_slow_path_cqe *sp_cqe;
422
423 sp_cqe = &p_cqe->rx_cqe_sp;
424 if (sp_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH) {
425 DP_NOTICE(p_hwfn,
426 "LL2 - unexpected Rx CQE slowpath ramrod_cmd_id:%d\n",
427 sp_cqe->ramrod_cmd_id);
428 return -EINVAL;
429 }
430
431 if (!p_ll2_conn->cbs.slowpath_cb) {
432 DP_NOTICE(p_hwfn,
433 "LL2 - received RX_QUEUE_FLUSH but no callback was provided\n");
434 return -EINVAL;
435 }
436
437 spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
438
439 p_ll2_conn->cbs.slowpath_cb(p_ll2_conn->cbs.cookie,
440 p_ll2_conn->my_id,
441 le32_to_cpu(sp_cqe->opaque_data.data[0]),
442 le32_to_cpu(sp_cqe->opaque_data.data[1]));
443
444 spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
445
446 return 0;
447}
448
449static int
450qed_ll2_rxq_handle_completion(struct qed_hwfn *p_hwfn,
451 struct qed_ll2_info *p_ll2_conn,
452 union core_rx_cqe_union *p_cqe,
453 unsigned long *p_lock_flags, bool b_last_cqe)
454{
455 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
456 struct qed_ll2_rx_packet *p_pkt = NULL;
457 struct qed_ll2_comp_rx_data data;
458
459 if (!list_empty(&p_rx->active_descq))
460 p_pkt = list_first_entry(&p_rx->active_descq,
461 struct qed_ll2_rx_packet, list_entry);
462 if (!p_pkt) {
463 DP_NOTICE(p_hwfn,
464 "[%d] LL2 Rx completion but active_descq is empty\n",
465 p_ll2_conn->input.conn_type);
466
467 return -EIO;
468 }
469 list_del(&p_pkt->list_entry);
470
471 if (p_cqe->rx_cqe_sp.type == CORE_RX_CQE_TYPE_REGULAR)
472 qed_ll2_rxq_parse_reg(p_hwfn, p_cqe, &data);
473 else
474 qed_ll2_rxq_parse_gsi(p_hwfn, p_cqe, &data);
475 if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd)
476 DP_NOTICE(p_hwfn,
477 "Mismatch between active_descq and the LL2 Rx chain\n");
478
479 list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
480
481 data.connection_handle = p_ll2_conn->my_id;
482 data.cookie = p_pkt->cookie;
483 data.rx_buf_addr = p_pkt->rx_buf_addr;
484 data.b_last_packet = b_last_cqe;
485
486 spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
487 p_ll2_conn->cbs.rx_comp_cb(p_ll2_conn->cbs.cookie, &data);
488
489 spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
490
491 return 0;
492}
493
494static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie)
495{
496 struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)cookie;
497 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
498 union core_rx_cqe_union *cqe = NULL;
499 u16 cq_new_idx = 0, cq_old_idx = 0;
500 unsigned long flags = 0;
501 int rc = 0;
502
503 spin_lock_irqsave(&p_rx->lock, flags);
504 cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
505 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
506
507 while (cq_new_idx != cq_old_idx) {
508 bool b_last_cqe = (cq_new_idx == cq_old_idx);
509
510 cqe =
511 (union core_rx_cqe_union *)
512 qed_chain_consume(&p_rx->rcq_chain);
513 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
514
515 DP_VERBOSE(p_hwfn,
516 QED_MSG_LL2,
517 "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n",
518 cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type);
519
520 switch (cqe->rx_cqe_sp.type) {
521 case CORE_RX_CQE_TYPE_SLOW_PATH:
522 rc = qed_ll2_handle_slowpath(p_hwfn, p_ll2_conn,
523 cqe, &flags);
524 break;
525 case CORE_RX_CQE_TYPE_GSI_OFFLOAD:
526 case CORE_RX_CQE_TYPE_REGULAR:
527 rc = qed_ll2_rxq_handle_completion(p_hwfn, p_ll2_conn,
528 cqe, &flags,
529 b_last_cqe);
530 break;
531 default:
532 rc = -EIO;
533 }
534 }
535
536 spin_unlock_irqrestore(&p_rx->lock, flags);
537 return rc;
538}
539
540static void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
541{
542 struct qed_ll2_info *p_ll2_conn = NULL;
543 struct qed_ll2_rx_packet *p_pkt = NULL;
544 struct qed_ll2_rx_queue *p_rx;
545 unsigned long flags = 0;
546
547 p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
548 if (!p_ll2_conn)
549 return;
550
551 p_rx = &p_ll2_conn->rx_queue;
552
553 spin_lock_irqsave(&p_rx->lock, flags);
554 while (!list_empty(&p_rx->active_descq)) {
555 p_pkt = list_first_entry(&p_rx->active_descq,
556 struct qed_ll2_rx_packet, list_entry);
557 if (!p_pkt)
558 break;
559 list_move_tail(&p_pkt->list_entry, &p_rx->free_descq);
560 spin_unlock_irqrestore(&p_rx->lock, flags);
561
562 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO) {
563 struct qed_ooo_buffer *p_buffer;
564
565 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
566 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
567 p_buffer);
568 } else {
569 dma_addr_t rx_buf_addr = p_pkt->rx_buf_addr;
570 void *cookie = p_pkt->cookie;
571 bool b_last;
572
573 b_last = list_empty(&p_rx->active_descq);
574 p_ll2_conn->cbs.rx_release_cb(p_ll2_conn->cbs.cookie,
575 p_ll2_conn->my_id,
576 cookie,
577 rx_buf_addr, b_last);
578 }
579 spin_lock_irqsave(&p_rx->lock, flags);
580 }
581 spin_unlock_irqrestore(&p_rx->lock, flags);
582}
583
584static bool
585qed_ll2_lb_rxq_handler_slowpath(struct qed_hwfn *p_hwfn,
586 struct core_rx_slow_path_cqe *p_cqe)
587{
588 struct ooo_opaque *iscsi_ooo;
589 u32 cid;
590
591 if (p_cqe->ramrod_cmd_id != CORE_RAMROD_RX_QUEUE_FLUSH)
592 return false;
593
594 iscsi_ooo = (struct ooo_opaque *)&p_cqe->opaque_data;
595 if (iscsi_ooo->ooo_opcode != TCP_EVENT_DELETE_ISLES)
596 return false;
597
598
599 cid = le32_to_cpu(iscsi_ooo->cid);
600 qed_ooo_release_connection_isles(p_hwfn, p_hwfn->p_ooo_info, cid);
601
602 return true;
603}
604
605static int qed_ll2_lb_rxq_handler(struct qed_hwfn *p_hwfn,
606 struct qed_ll2_info *p_ll2_conn)
607{
608 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
609 u16 packet_length = 0, parse_flags = 0, vlan = 0;
610 struct qed_ll2_rx_packet *p_pkt = NULL;
611 u32 num_ooo_add_to_peninsula = 0, cid;
612 union core_rx_cqe_union *cqe = NULL;
613 u16 cq_new_idx = 0, cq_old_idx = 0;
614 struct qed_ooo_buffer *p_buffer;
615 struct ooo_opaque *iscsi_ooo;
616 u8 placement_offset = 0;
617 u8 cqe_type;
618
619 cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
620 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
621 if (cq_new_idx == cq_old_idx)
622 return 0;
623
624 while (cq_new_idx != cq_old_idx) {
625 struct core_rx_fast_path_cqe *p_cqe_fp;
626
627 cqe = qed_chain_consume(&p_rx->rcq_chain);
628 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
629 cqe_type = cqe->rx_cqe_sp.type;
630
631 if (cqe_type == CORE_RX_CQE_TYPE_SLOW_PATH)
632 if (qed_ll2_lb_rxq_handler_slowpath(p_hwfn,
633 &cqe->rx_cqe_sp))
634 continue;
635
636 if (cqe_type != CORE_RX_CQE_TYPE_REGULAR) {
637 DP_NOTICE(p_hwfn,
638 "Got a non-regular LB LL2 completion [type 0x%02x]\n",
639 cqe_type);
640 return -EINVAL;
641 }
642 p_cqe_fp = &cqe->rx_cqe_fp;
643
644 placement_offset = p_cqe_fp->placement_offset;
645 parse_flags = le16_to_cpu(p_cqe_fp->parse_flags.flags);
646 packet_length = le16_to_cpu(p_cqe_fp->packet_length);
647 vlan = le16_to_cpu(p_cqe_fp->vlan);
648 iscsi_ooo = (struct ooo_opaque *)&p_cqe_fp->opaque_data;
649 qed_ooo_save_history_entry(p_hwfn, p_hwfn->p_ooo_info,
650 iscsi_ooo);
651 cid = le32_to_cpu(iscsi_ooo->cid);
652
653
654 if (iscsi_ooo->drop_size)
655 qed_ooo_delete_isles(p_hwfn, p_hwfn->p_ooo_info, cid,
656 iscsi_ooo->drop_isle,
657 iscsi_ooo->drop_size);
658
659 if (iscsi_ooo->ooo_opcode == TCP_EVENT_NOP)
660 continue;
661
662
663 if (list_empty(&p_rx->active_descq)) {
664 DP_NOTICE(p_hwfn,
665 "LL2 OOO RX chain has no submitted buffers\n"
666 );
667 return -EIO;
668 }
669
670 p_pkt = list_first_entry(&p_rx->active_descq,
671 struct qed_ll2_rx_packet, list_entry);
672
673 if ((iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_NEW_ISLE) ||
674 (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_RIGHT) ||
675 (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_ISLE_LEFT) ||
676 (iscsi_ooo->ooo_opcode == TCP_EVENT_ADD_PEN) ||
677 (iscsi_ooo->ooo_opcode == TCP_EVENT_JOIN)) {
678 if (!p_pkt) {
679 DP_NOTICE(p_hwfn,
680 "LL2 OOO RX packet is not valid\n");
681 return -EIO;
682 }
683 list_del(&p_pkt->list_entry);
684 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
685 p_buffer->packet_length = packet_length;
686 p_buffer->parse_flags = parse_flags;
687 p_buffer->vlan = vlan;
688 p_buffer->placement_offset = placement_offset;
689 qed_chain_consume(&p_rx->rxq_chain);
690 list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
691
692 switch (iscsi_ooo->ooo_opcode) {
693 case TCP_EVENT_ADD_NEW_ISLE:
694 qed_ooo_add_new_isle(p_hwfn,
695 p_hwfn->p_ooo_info,
696 cid,
697 iscsi_ooo->ooo_isle,
698 p_buffer);
699 break;
700 case TCP_EVENT_ADD_ISLE_RIGHT:
701 qed_ooo_add_new_buffer(p_hwfn,
702 p_hwfn->p_ooo_info,
703 cid,
704 iscsi_ooo->ooo_isle,
705 p_buffer,
706 QED_OOO_RIGHT_BUF);
707 break;
708 case TCP_EVENT_ADD_ISLE_LEFT:
709 qed_ooo_add_new_buffer(p_hwfn,
710 p_hwfn->p_ooo_info,
711 cid,
712 iscsi_ooo->ooo_isle,
713 p_buffer,
714 QED_OOO_LEFT_BUF);
715 break;
716 case TCP_EVENT_JOIN:
717 qed_ooo_add_new_buffer(p_hwfn,
718 p_hwfn->p_ooo_info,
719 cid,
720 iscsi_ooo->ooo_isle +
721 1,
722 p_buffer,
723 QED_OOO_LEFT_BUF);
724 qed_ooo_join_isles(p_hwfn,
725 p_hwfn->p_ooo_info,
726 cid, iscsi_ooo->ooo_isle);
727 break;
728 case TCP_EVENT_ADD_PEN:
729 num_ooo_add_to_peninsula++;
730 qed_ooo_put_ready_buffer(p_hwfn,
731 p_hwfn->p_ooo_info,
732 p_buffer, true);
733 break;
734 }
735 } else {
736 DP_NOTICE(p_hwfn,
737 "Unexpected event (%d) TX OOO completion\n",
738 iscsi_ooo->ooo_opcode);
739 }
740 }
741
742 return 0;
743}
744
745static void
746qed_ooo_submit_tx_buffers(struct qed_hwfn *p_hwfn,
747 struct qed_ll2_info *p_ll2_conn)
748{
749 struct qed_ll2_tx_pkt_info tx_pkt;
750 struct qed_ooo_buffer *p_buffer;
751 u16 l4_hdr_offset_w;
752 dma_addr_t first_frag;
753 u8 bd_flags;
754 int rc;
755
756
757 while ((p_buffer = qed_ooo_get_ready_buffer(p_hwfn,
758 p_hwfn->p_ooo_info))) {
759 l4_hdr_offset_w = 0;
760 bd_flags = 0;
761
762 first_frag = p_buffer->rx_buffer_phys_addr +
763 p_buffer->placement_offset;
764 SET_FIELD(bd_flags, CORE_TX_BD_DATA_FORCE_VLAN_MODE, 1);
765 SET_FIELD(bd_flags, CORE_TX_BD_DATA_L4_PROTOCOL, 1);
766
767 memset(&tx_pkt, 0, sizeof(tx_pkt));
768 tx_pkt.num_of_bds = 1;
769 tx_pkt.vlan = p_buffer->vlan;
770 tx_pkt.bd_flags = bd_flags;
771 tx_pkt.l4_hdr_offset_w = l4_hdr_offset_w;
772 switch (p_ll2_conn->tx_dest) {
773 case CORE_TX_DEST_NW:
774 tx_pkt.tx_dest = QED_LL2_TX_DEST_NW;
775 break;
776 case CORE_TX_DEST_LB:
777 tx_pkt.tx_dest = QED_LL2_TX_DEST_LB;
778 break;
779 case CORE_TX_DEST_DROP:
780 default:
781 tx_pkt.tx_dest = QED_LL2_TX_DEST_DROP;
782 break;
783 }
784 tx_pkt.first_frag = first_frag;
785 tx_pkt.first_frag_len = p_buffer->packet_length;
786 tx_pkt.cookie = p_buffer;
787
788 rc = qed_ll2_prepare_tx_packet(p_hwfn, p_ll2_conn->my_id,
789 &tx_pkt, true);
790 if (rc) {
791 qed_ooo_put_ready_buffer(p_hwfn, p_hwfn->p_ooo_info,
792 p_buffer, false);
793 break;
794 }
795 }
796}
797
798static void
799qed_ooo_submit_rx_buffers(struct qed_hwfn *p_hwfn,
800 struct qed_ll2_info *p_ll2_conn)
801{
802 struct qed_ooo_buffer *p_buffer;
803 int rc;
804
805 while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
806 p_hwfn->p_ooo_info))) {
807 rc = qed_ll2_post_rx_buffer(p_hwfn,
808 p_ll2_conn->my_id,
809 p_buffer->rx_buffer_phys_addr,
810 0, p_buffer, true);
811 if (rc) {
812 qed_ooo_put_free_buffer(p_hwfn,
813 p_hwfn->p_ooo_info, p_buffer);
814 break;
815 }
816 }
817}
818
819static int qed_ll2_lb_rxq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
820{
821 struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
822 int rc;
823
824 if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
825 return 0;
826
827 rc = qed_ll2_lb_rxq_handler(p_hwfn, p_ll2_conn);
828 if (rc)
829 return rc;
830
831 qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
832 qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
833
834 return 0;
835}
836
837static int qed_ll2_lb_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
838{
839 struct qed_ll2_info *p_ll2_conn = (struct qed_ll2_info *)p_cookie;
840 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
841 struct qed_ll2_tx_packet *p_pkt = NULL;
842 struct qed_ooo_buffer *p_buffer;
843 bool b_dont_submit_rx = false;
844 u16 new_idx = 0, num_bds = 0;
845 int rc;
846
847 if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
848 return 0;
849
850 new_idx = le16_to_cpu(*p_tx->p_fw_cons);
851 num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
852
853 if (!num_bds)
854 return 0;
855
856 while (num_bds) {
857 if (list_empty(&p_tx->active_descq))
858 return -EINVAL;
859
860 p_pkt = list_first_entry(&p_tx->active_descq,
861 struct qed_ll2_tx_packet, list_entry);
862 if (!p_pkt)
863 return -EINVAL;
864
865 if (p_pkt->bd_used != 1) {
866 DP_NOTICE(p_hwfn,
867 "Unexpectedly many BDs(%d) in TX OOO completion\n",
868 p_pkt->bd_used);
869 return -EINVAL;
870 }
871
872 list_del(&p_pkt->list_entry);
873
874 num_bds--;
875 p_tx->bds_idx++;
876 qed_chain_consume(&p_tx->txq_chain);
877
878 p_buffer = (struct qed_ooo_buffer *)p_pkt->cookie;
879 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
880
881 if (b_dont_submit_rx) {
882 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info,
883 p_buffer);
884 continue;
885 }
886
887 rc = qed_ll2_post_rx_buffer(p_hwfn, p_ll2_conn->my_id,
888 p_buffer->rx_buffer_phys_addr, 0,
889 p_buffer, true);
890 if (rc != 0) {
891 qed_ooo_put_free_buffer(p_hwfn,
892 p_hwfn->p_ooo_info, p_buffer);
893 b_dont_submit_rx = true;
894 }
895 }
896
897 qed_ooo_submit_tx_buffers(p_hwfn, p_ll2_conn);
898
899 return 0;
900}
901
902static void qed_ll2_stop_ooo(struct qed_hwfn *p_hwfn)
903{
904 u8 *handle = &p_hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
905
906 DP_VERBOSE(p_hwfn, (QED_MSG_STORAGE | QED_MSG_LL2),
907 "Stopping LL2 OOO queue [%02x]\n", *handle);
908
909 qed_ll2_terminate_connection(p_hwfn, *handle);
910 qed_ll2_release_connection(p_hwfn, *handle);
911 *handle = QED_LL2_UNUSED_HANDLE;
912}
913
914static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn,
915 struct qed_ll2_info *p_ll2_conn,
916 u8 action_on_error)
917{
918 enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
919 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
920 struct core_rx_start_ramrod_data *p_ramrod = NULL;
921 struct qed_spq_entry *p_ent = NULL;
922 struct qed_sp_init_data init_data;
923 u16 cqe_pbl_size;
924 int rc = 0;
925
926
927 memset(&init_data, 0, sizeof(init_data));
928 init_data.cid = p_ll2_conn->cid;
929 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
930 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
931
932 rc = qed_sp_init_request(p_hwfn, &p_ent,
933 CORE_RAMROD_RX_QUEUE_START,
934 PROTOCOLID_CORE, &init_data);
935 if (rc)
936 return rc;
937
938 p_ramrod = &p_ent->ramrod.core_rx_queue_start;
939 memset(p_ramrod, 0, sizeof(*p_ramrod));
940 p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
941 p_ramrod->sb_index = p_rx->rx_sb_index;
942 p_ramrod->complete_event_flg = 1;
943
944 p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
945 DMA_REGPAIR_LE(p_ramrod->bd_base, p_rx->rxq_chain.p_phys_addr);
946 cqe_pbl_size = (u16)qed_chain_get_page_cnt(&p_rx->rcq_chain);
947 p_ramrod->num_of_pbl_pages = cpu_to_le16(cqe_pbl_size);
948 DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr,
949 qed_chain_get_pbl_phys(&p_rx->rcq_chain));
950
951 p_ramrod->drop_ttl0_flg = p_ll2_conn->input.rx_drop_ttl0_flg;
952 p_ramrod->inner_vlan_stripping_en =
953 p_ll2_conn->input.rx_vlan_removal_en;
954
955 if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) &&
956 p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE)
957 p_ramrod->report_outer_vlan = 1;
958 p_ramrod->queue_id = p_ll2_conn->queue_id;
959 p_ramrod->main_func_queue = p_ll2_conn->main_func_queue ? 1 : 0;
960
961 if (test_bit(QED_MF_LL2_NON_UNICAST, &p_hwfn->cdev->mf_bits) &&
962 p_ramrod->main_func_queue && conn_type != QED_LL2_TYPE_ROCE &&
963 conn_type != QED_LL2_TYPE_IWARP) {
964 p_ramrod->mf_si_bcast_accept_all = 1;
965 p_ramrod->mf_si_mcast_accept_all = 1;
966 } else {
967 p_ramrod->mf_si_bcast_accept_all = 0;
968 p_ramrod->mf_si_mcast_accept_all = 0;
969 }
970
971 p_ramrod->action_on_error.error_type = action_on_error;
972 p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
973 p_ramrod->zero_prod_flg = 1;
974
975 return qed_spq_post(p_hwfn, p_ent, NULL);
976}
977
978static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn,
979 struct qed_ll2_info *p_ll2_conn)
980{
981 enum qed_ll2_conn_type conn_type = p_ll2_conn->input.conn_type;
982 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
983 struct core_tx_start_ramrod_data *p_ramrod = NULL;
984 struct qed_spq_entry *p_ent = NULL;
985 struct qed_sp_init_data init_data;
986 u16 pq_id = 0, pbl_size;
987 int rc = -EINVAL;
988
989 if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
990 return 0;
991
992 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
993 p_ll2_conn->tx_stats_en = 0;
994 else
995 p_ll2_conn->tx_stats_en = 1;
996
997
998 memset(&init_data, 0, sizeof(init_data));
999 init_data.cid = p_ll2_conn->cid;
1000 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1001 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1002
1003 rc = qed_sp_init_request(p_hwfn, &p_ent,
1004 CORE_RAMROD_TX_QUEUE_START,
1005 PROTOCOLID_CORE, &init_data);
1006 if (rc)
1007 return rc;
1008
1009 p_ramrod = &p_ent->ramrod.core_tx_queue_start;
1010
1011 p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
1012 p_ramrod->sb_index = p_tx->tx_sb_index;
1013 p_ramrod->mtu = cpu_to_le16(p_ll2_conn->input.mtu);
1014 p_ramrod->stats_en = p_ll2_conn->tx_stats_en;
1015 p_ramrod->stats_id = p_ll2_conn->tx_stats_id;
1016
1017 DMA_REGPAIR_LE(p_ramrod->pbl_base_addr,
1018 qed_chain_get_pbl_phys(&p_tx->txq_chain));
1019 pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain);
1020 p_ramrod->pbl_size = cpu_to_le16(pbl_size);
1021
1022 switch (p_ll2_conn->input.tx_tc) {
1023 case PURE_LB_TC:
1024 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB);
1025 break;
1026 case PKT_LB_TC:
1027 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OOO);
1028 break;
1029 default:
1030 pq_id = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
1031 break;
1032 }
1033
1034 p_ramrod->qm_pq_id = cpu_to_le16(pq_id);
1035
1036 switch (conn_type) {
1037 case QED_LL2_TYPE_FCOE:
1038 p_ramrod->conn_type = PROTOCOLID_FCOE;
1039 break;
1040 case QED_LL2_TYPE_ISCSI:
1041 p_ramrod->conn_type = PROTOCOLID_ISCSI;
1042 break;
1043 case QED_LL2_TYPE_ROCE:
1044 p_ramrod->conn_type = PROTOCOLID_ROCE;
1045 break;
1046 case QED_LL2_TYPE_IWARP:
1047 p_ramrod->conn_type = PROTOCOLID_IWARP;
1048 break;
1049 case QED_LL2_TYPE_OOO:
1050 if (p_hwfn->hw_info.personality == QED_PCI_ISCSI)
1051 p_ramrod->conn_type = PROTOCOLID_ISCSI;
1052 else
1053 p_ramrod->conn_type = PROTOCOLID_IWARP;
1054 break;
1055 default:
1056 p_ramrod->conn_type = PROTOCOLID_ETH;
1057 DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type);
1058 }
1059
1060 p_ramrod->gsi_offload_flag = p_ll2_conn->input.gsi_enable;
1061
1062 rc = qed_spq_post(p_hwfn, p_ent, NULL);
1063 if (rc)
1064 return rc;
1065
1066 rc = qed_db_recovery_add(p_hwfn->cdev, p_tx->doorbell_addr,
1067 &p_tx->db_msg, DB_REC_WIDTH_32B,
1068 DB_REC_KERNEL);
1069 return rc;
1070}
1071
1072static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn,
1073 struct qed_ll2_info *p_ll2_conn)
1074{
1075 struct core_rx_stop_ramrod_data *p_ramrod = NULL;
1076 struct qed_spq_entry *p_ent = NULL;
1077 struct qed_sp_init_data init_data;
1078 int rc = -EINVAL;
1079
1080
1081 memset(&init_data, 0, sizeof(init_data));
1082 init_data.cid = p_ll2_conn->cid;
1083 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1084 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1085
1086 rc = qed_sp_init_request(p_hwfn, &p_ent,
1087 CORE_RAMROD_RX_QUEUE_STOP,
1088 PROTOCOLID_CORE, &init_data);
1089 if (rc)
1090 return rc;
1091
1092 p_ramrod = &p_ent->ramrod.core_rx_queue_stop;
1093
1094 p_ramrod->complete_event_flg = 1;
1095 p_ramrod->queue_id = p_ll2_conn->queue_id;
1096
1097 return qed_spq_post(p_hwfn, p_ent, NULL);
1098}
1099
1100static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn,
1101 struct qed_ll2_info *p_ll2_conn)
1102{
1103 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1104 struct qed_spq_entry *p_ent = NULL;
1105 struct qed_sp_init_data init_data;
1106 int rc = -EINVAL;
1107 qed_db_recovery_del(p_hwfn->cdev, p_tx->doorbell_addr, &p_tx->db_msg);
1108
1109
1110 memset(&init_data, 0, sizeof(init_data));
1111 init_data.cid = p_ll2_conn->cid;
1112 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
1113 init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
1114
1115 rc = qed_sp_init_request(p_hwfn, &p_ent,
1116 CORE_RAMROD_TX_QUEUE_STOP,
1117 PROTOCOLID_CORE, &init_data);
1118 if (rc)
1119 return rc;
1120
1121 return qed_spq_post(p_hwfn, p_ent, NULL);
1122}
1123
1124static int
1125qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
1126 struct qed_ll2_info *p_ll2_info)
1127{
1128 struct qed_chain_init_params params = {
1129 .intended_use = QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1130 .cnt_type = QED_CHAIN_CNT_TYPE_U16,
1131 .num_elems = p_ll2_info->input.rx_num_desc,
1132 };
1133 struct qed_dev *cdev = p_hwfn->cdev;
1134 struct qed_ll2_rx_packet *p_descq;
1135 u32 capacity;
1136 int rc = 0;
1137
1138 if (!p_ll2_info->input.rx_num_desc)
1139 goto out;
1140
1141 params.mode = QED_CHAIN_MODE_NEXT_PTR;
1142 params.elem_size = sizeof(struct core_rx_bd);
1143
1144 rc = qed_chain_alloc(cdev, &p_ll2_info->rx_queue.rxq_chain, ¶ms);
1145 if (rc) {
1146 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n");
1147 goto out;
1148 }
1149
1150 capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain);
1151 p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet),
1152 GFP_KERNEL);
1153 if (!p_descq) {
1154 rc = -ENOMEM;
1155 DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n");
1156 goto out;
1157 }
1158 p_ll2_info->rx_queue.descq_array = p_descq;
1159
1160 params.mode = QED_CHAIN_MODE_PBL;
1161 params.elem_size = sizeof(struct core_rx_fast_path_cqe);
1162
1163 rc = qed_chain_alloc(cdev, &p_ll2_info->rx_queue.rcq_chain, ¶ms);
1164 if (rc) {
1165 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n");
1166 goto out;
1167 }
1168
1169 DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1170 "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n",
1171 p_ll2_info->input.conn_type, p_ll2_info->input.rx_num_desc);
1172
1173out:
1174 return rc;
1175}
1176
1177static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
1178 struct qed_ll2_info *p_ll2_info)
1179{
1180 struct qed_chain_init_params params = {
1181 .mode = QED_CHAIN_MODE_PBL,
1182 .intended_use = QED_CHAIN_USE_TO_CONSUME_PRODUCE,
1183 .cnt_type = QED_CHAIN_CNT_TYPE_U16,
1184 .num_elems = p_ll2_info->input.tx_num_desc,
1185 .elem_size = sizeof(struct core_tx_bd),
1186 };
1187 struct qed_ll2_tx_packet *p_descq;
1188 u32 desc_size;
1189 u32 capacity;
1190 int rc = 0;
1191
1192 if (!p_ll2_info->input.tx_num_desc)
1193 goto out;
1194
1195 rc = qed_chain_alloc(p_hwfn->cdev, &p_ll2_info->tx_queue.txq_chain,
1196 ¶ms);
1197 if (rc)
1198 goto out;
1199
1200 capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain);
1201
1202 desc_size = (sizeof(*p_descq) +
1203 (p_ll2_info->input.tx_max_bds_per_packet - 1) *
1204 sizeof(p_descq->bds_set));
1205
1206 p_descq = kcalloc(capacity, desc_size, GFP_KERNEL);
1207 if (!p_descq) {
1208 rc = -ENOMEM;
1209 goto out;
1210 }
1211 p_ll2_info->tx_queue.descq_mem = p_descq;
1212
1213 DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1214 "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n",
1215 p_ll2_info->input.conn_type, p_ll2_info->input.tx_num_desc);
1216
1217out:
1218 if (rc)
1219 DP_NOTICE(p_hwfn,
1220 "Can't allocate memory for Tx LL2 with 0x%08x buffers\n",
1221 p_ll2_info->input.tx_num_desc);
1222 return rc;
1223}
1224
1225static int
1226qed_ll2_acquire_connection_ooo(struct qed_hwfn *p_hwfn,
1227 struct qed_ll2_info *p_ll2_info, u16 mtu)
1228{
1229 struct qed_ooo_buffer *p_buf = NULL;
1230 void *p_virt;
1231 u16 buf_idx;
1232 int rc = 0;
1233
1234 if (p_ll2_info->input.conn_type != QED_LL2_TYPE_OOO)
1235 return rc;
1236
1237
1238 if (!p_ll2_info->input.rx_num_ooo_buffers) {
1239 u16 num_desc = p_ll2_info->input.rx_num_desc;
1240
1241 if (!num_desc)
1242 return -EINVAL;
1243 p_ll2_info->input.rx_num_ooo_buffers = num_desc * 2;
1244 }
1245
1246 for (buf_idx = 0; buf_idx < p_ll2_info->input.rx_num_ooo_buffers;
1247 buf_idx++) {
1248 p_buf = kzalloc(sizeof(*p_buf), GFP_KERNEL);
1249 if (!p_buf) {
1250 rc = -ENOMEM;
1251 goto out;
1252 }
1253
1254 p_buf->rx_buffer_size = mtu + 26 + ETH_CACHE_LINE_SIZE;
1255 p_buf->rx_buffer_size = (p_buf->rx_buffer_size +
1256 ETH_CACHE_LINE_SIZE - 1) &
1257 ~(ETH_CACHE_LINE_SIZE - 1);
1258 p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
1259 p_buf->rx_buffer_size,
1260 &p_buf->rx_buffer_phys_addr,
1261 GFP_KERNEL);
1262 if (!p_virt) {
1263 kfree(p_buf);
1264 rc = -ENOMEM;
1265 goto out;
1266 }
1267
1268 p_buf->rx_buffer_virt_addr = p_virt;
1269 qed_ooo_put_free_buffer(p_hwfn, p_hwfn->p_ooo_info, p_buf);
1270 }
1271
1272 DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1273 "Allocated [%04x] LL2 OOO buffers [each of size 0x%08x]\n",
1274 p_ll2_info->input.rx_num_ooo_buffers, p_buf->rx_buffer_size);
1275
1276out:
1277 return rc;
1278}
1279
1280static int
1281qed_ll2_set_cbs(struct qed_ll2_info *p_ll2_info, const struct qed_ll2_cbs *cbs)
1282{
1283 if (!cbs || (!cbs->rx_comp_cb ||
1284 !cbs->rx_release_cb ||
1285 !cbs->tx_comp_cb || !cbs->tx_release_cb || !cbs->cookie))
1286 return -EINVAL;
1287
1288 p_ll2_info->cbs.rx_comp_cb = cbs->rx_comp_cb;
1289 p_ll2_info->cbs.rx_release_cb = cbs->rx_release_cb;
1290 p_ll2_info->cbs.tx_comp_cb = cbs->tx_comp_cb;
1291 p_ll2_info->cbs.tx_release_cb = cbs->tx_release_cb;
1292 p_ll2_info->cbs.slowpath_cb = cbs->slowpath_cb;
1293 p_ll2_info->cbs.cookie = cbs->cookie;
1294
1295 return 0;
1296}
1297
1298static void _qed_ll2_calc_allowed_conns(struct qed_hwfn *p_hwfn,
1299 struct qed_ll2_acquire_data *data,
1300 u8 *start_idx, u8 *last_idx)
1301{
1302
1303
1304
1305 if (data->input.rx_conn_type == QED_LL2_RX_TYPE_LEGACY) {
1306 *start_idx = QED_LL2_LEGACY_CONN_BASE_PF;
1307 *last_idx = *start_idx +
1308 QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF;
1309 } else {
1310
1311 *start_idx = QED_LL2_CTX_CONN_BASE_PF;
1312 *last_idx = *start_idx +
1313 QED_MAX_NUM_OF_CTX_LL2_CONNS_PF;
1314 }
1315}
1316
1317static enum core_error_handle
1318qed_ll2_get_error_choice(enum qed_ll2_error_handle err)
1319{
1320 switch (err) {
1321 case QED_LL2_DROP_PACKET:
1322 return LL2_DROP_PACKET;
1323 case QED_LL2_DO_NOTHING:
1324 return LL2_DO_NOTHING;
1325 case QED_LL2_ASSERT:
1326 return LL2_ASSERT;
1327 default:
1328 return LL2_DO_NOTHING;
1329 }
1330}
1331
1332int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data)
1333{
1334 struct qed_hwfn *p_hwfn = cxt;
1335 qed_int_comp_cb_t comp_rx_cb, comp_tx_cb;
1336 struct qed_ll2_info *p_ll2_info = NULL;
1337 u8 i, first_idx, last_idx, *p_tx_max;
1338 int rc;
1339
1340 if (!data->p_connection_handle || !p_hwfn->p_ll2_info)
1341 return -EINVAL;
1342
1343 _qed_ll2_calc_allowed_conns(p_hwfn, data, &first_idx, &last_idx);
1344
1345
1346 for (i = first_idx; i < last_idx; i++) {
1347 mutex_lock(&p_hwfn->p_ll2_info[i].mutex);
1348 if (p_hwfn->p_ll2_info[i].b_active) {
1349 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1350 continue;
1351 }
1352
1353 p_hwfn->p_ll2_info[i].b_active = true;
1354 p_ll2_info = &p_hwfn->p_ll2_info[i];
1355 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
1356 break;
1357 }
1358 if (!p_ll2_info)
1359 return -EBUSY;
1360
1361 memcpy(&p_ll2_info->input, &data->input, sizeof(p_ll2_info->input));
1362
1363 switch (data->input.tx_dest) {
1364 case QED_LL2_TX_DEST_NW:
1365 p_ll2_info->tx_dest = CORE_TX_DEST_NW;
1366 break;
1367 case QED_LL2_TX_DEST_LB:
1368 p_ll2_info->tx_dest = CORE_TX_DEST_LB;
1369 break;
1370 case QED_LL2_TX_DEST_DROP:
1371 p_ll2_info->tx_dest = CORE_TX_DEST_DROP;
1372 break;
1373 default:
1374 return -EINVAL;
1375 }
1376
1377 if (data->input.conn_type == QED_LL2_TYPE_OOO ||
1378 data->input.secondary_queue)
1379 p_ll2_info->main_func_queue = false;
1380 else
1381 p_ll2_info->main_func_queue = true;
1382
1383
1384 p_tx_max = &p_ll2_info->input.tx_max_bds_per_packet;
1385 if (*p_tx_max == 0)
1386 *p_tx_max = CORE_LL2_TX_MAX_BDS_PER_PACKET;
1387 else
1388 *p_tx_max = min_t(u8, *p_tx_max,
1389 CORE_LL2_TX_MAX_BDS_PER_PACKET);
1390
1391 rc = qed_ll2_set_cbs(p_ll2_info, data->cbs);
1392 if (rc) {
1393 DP_NOTICE(p_hwfn, "Invalid callback functions\n");
1394 goto q_allocate_fail;
1395 }
1396
1397 rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info);
1398 if (rc)
1399 goto q_allocate_fail;
1400
1401 rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info);
1402 if (rc)
1403 goto q_allocate_fail;
1404
1405 rc = qed_ll2_acquire_connection_ooo(p_hwfn, p_ll2_info,
1406 data->input.mtu);
1407 if (rc)
1408 goto q_allocate_fail;
1409
1410
1411 if (data->input.conn_type == QED_LL2_TYPE_OOO) {
1412 comp_rx_cb = qed_ll2_lb_rxq_completion;
1413 comp_tx_cb = qed_ll2_lb_txq_completion;
1414 } else {
1415 comp_rx_cb = qed_ll2_rxq_completion;
1416 comp_tx_cb = qed_ll2_txq_completion;
1417 }
1418
1419 if (data->input.rx_num_desc) {
1420 qed_int_register_cb(p_hwfn, comp_rx_cb,
1421 &p_hwfn->p_ll2_info[i],
1422 &p_ll2_info->rx_queue.rx_sb_index,
1423 &p_ll2_info->rx_queue.p_fw_cons);
1424 p_ll2_info->rx_queue.b_cb_registered = true;
1425 }
1426
1427 if (data->input.tx_num_desc) {
1428 qed_int_register_cb(p_hwfn,
1429 comp_tx_cb,
1430 &p_hwfn->p_ll2_info[i],
1431 &p_ll2_info->tx_queue.tx_sb_index,
1432 &p_ll2_info->tx_queue.p_fw_cons);
1433 p_ll2_info->tx_queue.b_cb_registered = true;
1434 }
1435
1436 *data->p_connection_handle = i;
1437 return rc;
1438
1439q_allocate_fail:
1440 qed_ll2_release_connection(p_hwfn, i);
1441 return -ENOMEM;
1442}
1443
1444static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn,
1445 struct qed_ll2_info *p_ll2_conn)
1446{
1447 enum qed_ll2_error_handle error_input;
1448 enum core_error_handle error_mode;
1449 u8 action_on_error = 0;
1450 int rc;
1451
1452 if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
1453 return 0;
1454
1455 DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0);
1456 error_input = p_ll2_conn->input.ai_err_packet_too_big;
1457 error_mode = qed_ll2_get_error_choice(error_input);
1458 SET_FIELD(action_on_error,
1459 CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, error_mode);
1460 error_input = p_ll2_conn->input.ai_err_no_buf;
1461 error_mode = qed_ll2_get_error_choice(error_input);
1462 SET_FIELD(action_on_error, CORE_RX_ACTION_ON_ERROR_NO_BUFF, error_mode);
1463
1464 rc = qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error);
1465 if (rc)
1466 return rc;
1467
1468 if (p_ll2_conn->rx_queue.ctx_based) {
1469 rc = qed_db_recovery_add(p_hwfn->cdev,
1470 p_ll2_conn->rx_queue.set_prod_addr,
1471 &p_ll2_conn->rx_queue.db_data,
1472 DB_REC_WIDTH_64B, DB_REC_KERNEL);
1473 }
1474
1475 return rc;
1476}
1477
1478static void
1479qed_ll2_establish_connection_ooo(struct qed_hwfn *p_hwfn,
1480 struct qed_ll2_info *p_ll2_conn)
1481{
1482 if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
1483 return;
1484
1485 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
1486 qed_ooo_submit_rx_buffers(p_hwfn, p_ll2_conn);
1487}
1488
1489static inline u8 qed_ll2_handle_to_queue_id(struct qed_hwfn *p_hwfn,
1490 u8 handle,
1491 u8 ll2_queue_type)
1492{
1493 u8 qid;
1494
1495 if (ll2_queue_type == QED_LL2_RX_TYPE_LEGACY)
1496 return p_hwfn->hw_info.resc_start[QED_LL2_RAM_QUEUE] + handle;
1497
1498
1499
1500
1501
1502
1503
1504 qid = p_hwfn->hw_info.resc_start[QED_LL2_CTX_QUEUE] +
1505 MAX_NUM_LL2_RX_RAM_QUEUES;
1506
1507
1508
1509
1510 qid += (handle - QED_MAX_NUM_OF_LEGACY_LL2_CONNS_PF);
1511
1512 return qid;
1513}
1514
1515int qed_ll2_establish_connection(void *cxt, u8 connection_handle)
1516{
1517 struct e4_core_conn_context *p_cxt;
1518 struct qed_ll2_tx_packet *p_pkt;
1519 struct qed_ll2_info *p_ll2_conn;
1520 struct qed_hwfn *p_hwfn = cxt;
1521 struct qed_ll2_rx_queue *p_rx;
1522 struct qed_ll2_tx_queue *p_tx;
1523 struct qed_cxt_info cxt_info;
1524 struct qed_ptt *p_ptt;
1525 int rc = -EINVAL;
1526 u32 i, capacity;
1527 u32 desc_size;
1528 u8 qid;
1529
1530 p_ptt = qed_ptt_acquire(p_hwfn);
1531 if (!p_ptt)
1532 return -EAGAIN;
1533
1534 p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
1535 if (!p_ll2_conn) {
1536 rc = -EINVAL;
1537 goto out;
1538 }
1539
1540 p_rx = &p_ll2_conn->rx_queue;
1541 p_tx = &p_ll2_conn->tx_queue;
1542
1543 qed_chain_reset(&p_rx->rxq_chain);
1544 qed_chain_reset(&p_rx->rcq_chain);
1545 INIT_LIST_HEAD(&p_rx->active_descq);
1546 INIT_LIST_HEAD(&p_rx->free_descq);
1547 INIT_LIST_HEAD(&p_rx->posting_descq);
1548 spin_lock_init(&p_rx->lock);
1549 capacity = qed_chain_get_capacity(&p_rx->rxq_chain);
1550 for (i = 0; i < capacity; i++)
1551 list_add_tail(&p_rx->descq_array[i].list_entry,
1552 &p_rx->free_descq);
1553 *p_rx->p_fw_cons = 0;
1554
1555 qed_chain_reset(&p_tx->txq_chain);
1556 INIT_LIST_HEAD(&p_tx->active_descq);
1557 INIT_LIST_HEAD(&p_tx->free_descq);
1558 INIT_LIST_HEAD(&p_tx->sending_descq);
1559 spin_lock_init(&p_tx->lock);
1560 capacity = qed_chain_get_capacity(&p_tx->txq_chain);
1561
1562 desc_size = (sizeof(*p_pkt) +
1563 (p_ll2_conn->input.tx_max_bds_per_packet - 1) *
1564 sizeof(p_pkt->bds_set));
1565
1566 for (i = 0; i < capacity; i++) {
1567 p_pkt = p_tx->descq_mem + desc_size * i;
1568 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
1569 }
1570 p_tx->cur_completing_bd_idx = 0;
1571 p_tx->bds_idx = 0;
1572 p_tx->b_completing_packet = false;
1573 p_tx->cur_send_packet = NULL;
1574 p_tx->cur_send_frag_num = 0;
1575 p_tx->cur_completing_frag_num = 0;
1576 *p_tx->p_fw_cons = 0;
1577
1578 rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid);
1579 if (rc)
1580 goto out;
1581 cxt_info.iid = p_ll2_conn->cid;
1582 rc = qed_cxt_get_cid_info(p_hwfn, &cxt_info);
1583 if (rc) {
1584 DP_NOTICE(p_hwfn, "Cannot find context info for cid=%d\n",
1585 p_ll2_conn->cid);
1586 goto out;
1587 }
1588
1589 p_cxt = cxt_info.p_cxt;
1590
1591 memset(p_cxt, 0, sizeof(*p_cxt));
1592
1593 qid = qed_ll2_handle_to_queue_id(p_hwfn, connection_handle,
1594 p_ll2_conn->input.rx_conn_type);
1595 p_ll2_conn->queue_id = qid;
1596 p_ll2_conn->tx_stats_id = qid;
1597
1598 DP_VERBOSE(p_hwfn, QED_MSG_LL2,
1599 "Establishing ll2 queue. PF %d ctx_based=%d abs qid=%d\n",
1600 p_hwfn->rel_pf_id, p_ll2_conn->input.rx_conn_type, qid);
1601
1602 if (p_ll2_conn->input.rx_conn_type == QED_LL2_RX_TYPE_LEGACY) {
1603 p_rx->set_prod_addr = p_hwfn->regview +
1604 GTT_BAR0_MAP_REG_TSDM_RAM + TSTORM_LL2_RX_PRODS_OFFSET(qid);
1605 } else {
1606
1607 p_rx->ctx_based = 1;
1608
1609 p_rx->set_prod_addr = p_hwfn->doorbells +
1610 p_hwfn->dpi_start_offset +
1611 DB_ADDR_SHIFT(DQ_PWM_OFFSET_TCM_LL2_PROD_UPDATE);
1612
1613
1614 p_rx->db_data.icid = cpu_to_le16((u16)p_ll2_conn->cid);
1615 SET_FIELD(p_rx->db_data.params,
1616 CORE_PWM_PROD_UPDATE_DATA_AGG_CMD, DB_AGG_CMD_SET);
1617 SET_FIELD(p_rx->db_data.params,
1618 CORE_PWM_PROD_UPDATE_DATA_RESERVED1, 0);
1619 }
1620
1621 p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells +
1622 qed_db_addr(p_ll2_conn->cid,
1623 DQ_DEMS_LEGACY);
1624
1625 SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
1626 SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET);
1627 SET_FIELD(p_tx->db_msg.params, CORE_DB_DATA_AGG_VAL_SEL,
1628 DQ_XCM_CORE_TX_BD_PROD_CMD);
1629 p_tx->db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
1630
1631 rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn);
1632 if (rc)
1633 goto out;
1634
1635 rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn);
1636 if (rc)
1637 goto out;
1638
1639 if (!QED_IS_RDMA_PERSONALITY(p_hwfn))
1640 qed_wr(p_hwfn, p_ptt, PRS_REG_USE_LIGHT_L2, 1);
1641
1642 qed_ll2_establish_connection_ooo(p_hwfn, p_ll2_conn);
1643
1644 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
1645 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
1646 qed_llh_add_protocol_filter(p_hwfn->cdev, 0,
1647 QED_LLH_FILTER_ETHERTYPE,
1648 ETH_P_FCOE, 0);
1649 qed_llh_add_protocol_filter(p_hwfn->cdev, 0,
1650 QED_LLH_FILTER_ETHERTYPE,
1651 ETH_P_FIP, 0);
1652 }
1653
1654out:
1655 qed_ptt_release(p_hwfn, p_ptt);
1656 return rc;
1657}
1658
1659static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn,
1660 struct qed_ll2_rx_queue *p_rx,
1661 struct qed_ll2_rx_packet *p_curp)
1662{
1663 struct qed_ll2_rx_packet *p_posting_packet = NULL;
1664 struct core_ll2_rx_prod rx_prod = { 0, 0 };
1665 bool b_notify_fw = false;
1666 u16 bd_prod, cq_prod;
1667
1668
1669 while (!list_empty(&p_rx->posting_descq)) {
1670 p_posting_packet = list_first_entry(&p_rx->posting_descq,
1671 struct qed_ll2_rx_packet,
1672 list_entry);
1673 list_move_tail(&p_posting_packet->list_entry,
1674 &p_rx->active_descq);
1675 b_notify_fw = true;
1676 }
1677
1678
1679 if (p_curp) {
1680 list_add_tail(&p_curp->list_entry, &p_rx->active_descq);
1681 b_notify_fw = true;
1682 }
1683
1684 if (!b_notify_fw)
1685 return;
1686
1687 bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain);
1688 cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain);
1689 if (p_rx->ctx_based) {
1690
1691 p_rx->db_data.prod.bd_prod = cpu_to_le16(bd_prod);
1692 p_rx->db_data.prod.cqe_prod = cpu_to_le16(cq_prod);
1693
1694
1695
1696 dma_wmb();
1697 DIRECT_REG_WR64(p_rx->set_prod_addr,
1698 *((u64 *)&p_rx->db_data));
1699 } else {
1700 rx_prod.bd_prod = cpu_to_le16(bd_prod);
1701 rx_prod.cqe_prod = cpu_to_le16(cq_prod);
1702
1703
1704
1705
1706 dma_wmb();
1707
1708 DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod));
1709 }
1710}
1711
1712int qed_ll2_post_rx_buffer(void *cxt,
1713 u8 connection_handle,
1714 dma_addr_t addr,
1715 u16 buf_len, void *cookie, u8 notify_fw)
1716{
1717 struct qed_hwfn *p_hwfn = cxt;
1718 struct core_rx_bd_with_buff_len *p_curb = NULL;
1719 struct qed_ll2_rx_packet *p_curp = NULL;
1720 struct qed_ll2_info *p_ll2_conn;
1721 struct qed_ll2_rx_queue *p_rx;
1722 unsigned long flags;
1723 void *p_data;
1724 int rc = 0;
1725
1726 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1727 if (!p_ll2_conn)
1728 return -EINVAL;
1729 p_rx = &p_ll2_conn->rx_queue;
1730
1731 spin_lock_irqsave(&p_rx->lock, flags);
1732 if (!list_empty(&p_rx->free_descq))
1733 p_curp = list_first_entry(&p_rx->free_descq,
1734 struct qed_ll2_rx_packet, list_entry);
1735 if (p_curp) {
1736 if (qed_chain_get_elem_left(&p_rx->rxq_chain) &&
1737 qed_chain_get_elem_left(&p_rx->rcq_chain)) {
1738 p_data = qed_chain_produce(&p_rx->rxq_chain);
1739 p_curb = (struct core_rx_bd_with_buff_len *)p_data;
1740 qed_chain_produce(&p_rx->rcq_chain);
1741 }
1742 }
1743
1744
1745 if (!p_curp || !p_curb) {
1746 rc = -EBUSY;
1747 p_curp = NULL;
1748 goto out_notify;
1749 }
1750
1751
1752 DMA_REGPAIR_LE(p_curb->addr, addr);
1753 p_curb->buff_length = cpu_to_le16(buf_len);
1754 p_curp->rx_buf_addr = addr;
1755 p_curp->cookie = cookie;
1756 p_curp->rxq_bd = p_curb;
1757 p_curp->buf_length = buf_len;
1758 list_del(&p_curp->list_entry);
1759
1760
1761 if (!notify_fw) {
1762 list_add_tail(&p_curp->list_entry, &p_rx->posting_descq);
1763 goto out;
1764 }
1765
1766out_notify:
1767 qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp);
1768out:
1769 spin_unlock_irqrestore(&p_rx->lock, flags);
1770 return rc;
1771}
1772
1773static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn,
1774 struct qed_ll2_tx_queue *p_tx,
1775 struct qed_ll2_tx_packet *p_curp,
1776 struct qed_ll2_tx_pkt_info *pkt,
1777 u8 notify_fw)
1778{
1779 list_del(&p_curp->list_entry);
1780 p_curp->cookie = pkt->cookie;
1781 p_curp->bd_used = pkt->num_of_bds;
1782 p_curp->notify_fw = notify_fw;
1783 p_tx->cur_send_packet = p_curp;
1784 p_tx->cur_send_frag_num = 0;
1785
1786 p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = pkt->first_frag;
1787 p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = pkt->first_frag_len;
1788 p_tx->cur_send_frag_num++;
1789}
1790
1791static void
1792qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn,
1793 struct qed_ll2_info *p_ll2,
1794 struct qed_ll2_tx_packet *p_curp,
1795 struct qed_ll2_tx_pkt_info *pkt)
1796{
1797 struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain;
1798 u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain);
1799 struct core_tx_bd *start_bd = NULL;
1800 enum core_roce_flavor_type roce_flavor;
1801 enum core_tx_dest tx_dest;
1802 u16 bd_data = 0, frag_idx;
1803 u16 bitfield1;
1804
1805 roce_flavor = (pkt->qed_roce_flavor == QED_LL2_ROCE) ? CORE_ROCE
1806 : CORE_RROCE;
1807
1808 switch (pkt->tx_dest) {
1809 case QED_LL2_TX_DEST_NW:
1810 tx_dest = CORE_TX_DEST_NW;
1811 break;
1812 case QED_LL2_TX_DEST_LB:
1813 tx_dest = CORE_TX_DEST_LB;
1814 break;
1815 case QED_LL2_TX_DEST_DROP:
1816 tx_dest = CORE_TX_DEST_DROP;
1817 break;
1818 default:
1819 tx_dest = CORE_TX_DEST_LB;
1820 break;
1821 }
1822
1823 start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1824 if (QED_IS_IWARP_PERSONALITY(p_hwfn) &&
1825 p_ll2->input.conn_type == QED_LL2_TYPE_OOO) {
1826 start_bd->nw_vlan_or_lb_echo =
1827 cpu_to_le16(IWARP_LL2_IN_ORDER_TX_QUEUE);
1828 } else {
1829 start_bd->nw_vlan_or_lb_echo = cpu_to_le16(pkt->vlan);
1830 if (test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits) &&
1831 p_ll2->input.conn_type == QED_LL2_TYPE_FCOE)
1832 pkt->remove_stag = true;
1833 }
1834
1835 bitfield1 = le16_to_cpu(start_bd->bitfield1);
1836 SET_FIELD(bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W, pkt->l4_hdr_offset_w);
1837 SET_FIELD(bitfield1, CORE_TX_BD_TX_DST, tx_dest);
1838 start_bd->bitfield1 = cpu_to_le16(bitfield1);
1839
1840 bd_data |= pkt->bd_flags;
1841 SET_FIELD(bd_data, CORE_TX_BD_DATA_START_BD, 0x1);
1842 SET_FIELD(bd_data, CORE_TX_BD_DATA_NBDS, pkt->num_of_bds);
1843 SET_FIELD(bd_data, CORE_TX_BD_DATA_ROCE_FLAV, roce_flavor);
1844 SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_CSUM, !!(pkt->enable_ip_cksum));
1845 SET_FIELD(bd_data, CORE_TX_BD_DATA_L4_CSUM, !!(pkt->enable_l4_cksum));
1846 SET_FIELD(bd_data, CORE_TX_BD_DATA_IP_LEN, !!(pkt->calc_ip_len));
1847 SET_FIELD(bd_data, CORE_TX_BD_DATA_DISABLE_STAG_INSERTION,
1848 !!(pkt->remove_stag));
1849
1850 start_bd->bd_data.as_bitfield = cpu_to_le16(bd_data);
1851 DMA_REGPAIR_LE(start_bd->addr, pkt->first_frag);
1852 start_bd->nbytes = cpu_to_le16(pkt->first_frag_len);
1853
1854 DP_VERBOSE(p_hwfn,
1855 (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1856 "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",
1857 p_ll2->queue_id,
1858 p_ll2->cid,
1859 p_ll2->input.conn_type,
1860 prod_idx,
1861 pkt->first_frag_len,
1862 pkt->num_of_bds,
1863 le32_to_cpu(start_bd->addr.hi),
1864 le32_to_cpu(start_bd->addr.lo));
1865
1866 if (p_ll2->tx_queue.cur_send_frag_num == pkt->num_of_bds)
1867 return;
1868
1869
1870 for (frag_idx = p_ll2->tx_queue.cur_send_frag_num;
1871 frag_idx < pkt->num_of_bds; frag_idx++) {
1872 struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd;
1873
1874 *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
1875 (*p_bd)->bd_data.as_bitfield = 0;
1876 (*p_bd)->bitfield1 = 0;
1877 p_curp->bds_set[frag_idx].tx_frag = 0;
1878 p_curp->bds_set[frag_idx].frag_len = 0;
1879 }
1880}
1881
1882
1883static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn,
1884 struct qed_ll2_info *p_ll2_conn)
1885{
1886 bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw;
1887 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
1888 struct qed_ll2_tx_packet *p_pkt = NULL;
1889 u16 bd_prod;
1890
1891
1892 if (p_ll2_conn->tx_queue.cur_send_frag_num !=
1893 p_ll2_conn->tx_queue.cur_send_packet->bd_used)
1894 return;
1895
1896
1897 list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry,
1898 &p_ll2_conn->tx_queue.sending_descq);
1899 p_ll2_conn->tx_queue.cur_send_packet = NULL;
1900 p_ll2_conn->tx_queue.cur_send_frag_num = 0;
1901
1902
1903 if (!b_notify)
1904 return;
1905
1906 bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain);
1907
1908 while (!list_empty(&p_tx->sending_descq)) {
1909 p_pkt = list_first_entry(&p_tx->sending_descq,
1910 struct qed_ll2_tx_packet, list_entry);
1911 if (!p_pkt)
1912 break;
1913
1914 list_move_tail(&p_pkt->list_entry, &p_tx->active_descq);
1915 }
1916
1917 p_tx->db_msg.spq_prod = cpu_to_le16(bd_prod);
1918
1919
1920 wmb();
1921
1922 DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&p_tx->db_msg));
1923
1924 DP_VERBOSE(p_hwfn,
1925 (NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
1926 "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n",
1927 p_ll2_conn->queue_id,
1928 p_ll2_conn->cid,
1929 p_ll2_conn->input.conn_type, p_tx->db_msg.spq_prod);
1930}
1931
1932int qed_ll2_prepare_tx_packet(void *cxt,
1933 u8 connection_handle,
1934 struct qed_ll2_tx_pkt_info *pkt,
1935 bool notify_fw)
1936{
1937 struct qed_hwfn *p_hwfn = cxt;
1938 struct qed_ll2_tx_packet *p_curp = NULL;
1939 struct qed_ll2_info *p_ll2_conn = NULL;
1940 struct qed_ll2_tx_queue *p_tx;
1941 struct qed_chain *p_tx_chain;
1942 unsigned long flags;
1943 int rc = 0;
1944
1945 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1946 if (!p_ll2_conn)
1947 return -EINVAL;
1948 p_tx = &p_ll2_conn->tx_queue;
1949 p_tx_chain = &p_tx->txq_chain;
1950
1951 if (pkt->num_of_bds > p_ll2_conn->input.tx_max_bds_per_packet)
1952 return -EIO;
1953
1954 spin_lock_irqsave(&p_tx->lock, flags);
1955 if (p_tx->cur_send_packet) {
1956 rc = -EEXIST;
1957 goto out;
1958 }
1959
1960
1961 if (!list_empty(&p_tx->free_descq))
1962 p_curp = list_first_entry(&p_tx->free_descq,
1963 struct qed_ll2_tx_packet, list_entry);
1964 if (p_curp && qed_chain_get_elem_left(p_tx_chain) < pkt->num_of_bds)
1965 p_curp = NULL;
1966
1967 if (!p_curp) {
1968 rc = -EBUSY;
1969 goto out;
1970 }
1971
1972
1973 qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp, pkt, notify_fw);
1974
1975 qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp, pkt);
1976
1977 qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
1978
1979out:
1980 spin_unlock_irqrestore(&p_tx->lock, flags);
1981 return rc;
1982}
1983
1984int qed_ll2_set_fragment_of_tx_packet(void *cxt,
1985 u8 connection_handle,
1986 dma_addr_t addr, u16 nbytes)
1987{
1988 struct qed_ll2_tx_packet *p_cur_send_packet = NULL;
1989 struct qed_hwfn *p_hwfn = cxt;
1990 struct qed_ll2_info *p_ll2_conn = NULL;
1991 u16 cur_send_frag_num = 0;
1992 struct core_tx_bd *p_bd;
1993 unsigned long flags;
1994
1995 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
1996 if (!p_ll2_conn)
1997 return -EINVAL;
1998
1999 if (!p_ll2_conn->tx_queue.cur_send_packet)
2000 return -EINVAL;
2001
2002 p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet;
2003 cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num;
2004
2005 if (cur_send_frag_num >= p_cur_send_packet->bd_used)
2006 return -EINVAL;
2007
2008
2009 p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd;
2010 DMA_REGPAIR_LE(p_bd->addr, addr);
2011 p_bd->nbytes = cpu_to_le16(nbytes);
2012 p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr;
2013 p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes;
2014
2015 p_ll2_conn->tx_queue.cur_send_frag_num++;
2016
2017 spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags);
2018 qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
2019 spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags);
2020
2021 return 0;
2022}
2023
2024int qed_ll2_terminate_connection(void *cxt, u8 connection_handle)
2025{
2026 struct qed_hwfn *p_hwfn = cxt;
2027 struct qed_ll2_info *p_ll2_conn = NULL;
2028 int rc = -EINVAL;
2029 struct qed_ptt *p_ptt;
2030
2031 p_ptt = qed_ptt_acquire(p_hwfn);
2032 if (!p_ptt)
2033 return -EAGAIN;
2034
2035 p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
2036 if (!p_ll2_conn) {
2037 rc = -EINVAL;
2038 goto out;
2039 }
2040
2041
2042 if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
2043 p_ll2_conn->tx_queue.b_cb_registered = false;
2044 smp_wmb();
2045 rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn);
2046 if (rc)
2047 goto out;
2048
2049 qed_ll2_txq_flush(p_hwfn, connection_handle);
2050 qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index);
2051 }
2052
2053 if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
2054 p_ll2_conn->rx_queue.b_cb_registered = false;
2055 smp_wmb();
2056
2057 if (p_ll2_conn->rx_queue.ctx_based)
2058 qed_db_recovery_del(p_hwfn->cdev,
2059 p_ll2_conn->rx_queue.set_prod_addr,
2060 &p_ll2_conn->rx_queue.db_data);
2061
2062 rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn);
2063 if (rc)
2064 goto out;
2065
2066 qed_ll2_rxq_flush(p_hwfn, connection_handle);
2067 qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index);
2068 }
2069
2070 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_OOO)
2071 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
2072
2073 if (p_ll2_conn->input.conn_type == QED_LL2_TYPE_FCOE) {
2074 if (!test_bit(QED_MF_UFP_SPECIFIC, &p_hwfn->cdev->mf_bits))
2075 qed_llh_remove_protocol_filter(p_hwfn->cdev, 0,
2076 QED_LLH_FILTER_ETHERTYPE,
2077 ETH_P_FCOE, 0);
2078 qed_llh_remove_protocol_filter(p_hwfn->cdev, 0,
2079 QED_LLH_FILTER_ETHERTYPE,
2080 ETH_P_FIP, 0);
2081 }
2082
2083out:
2084 qed_ptt_release(p_hwfn, p_ptt);
2085 return rc;
2086}
2087
2088static void qed_ll2_release_connection_ooo(struct qed_hwfn *p_hwfn,
2089 struct qed_ll2_info *p_ll2_conn)
2090{
2091 struct qed_ooo_buffer *p_buffer;
2092
2093 if (p_ll2_conn->input.conn_type != QED_LL2_TYPE_OOO)
2094 return;
2095
2096 qed_ooo_release_all_isles(p_hwfn, p_hwfn->p_ooo_info);
2097 while ((p_buffer = qed_ooo_get_free_buffer(p_hwfn,
2098 p_hwfn->p_ooo_info))) {
2099 dma_free_coherent(&p_hwfn->cdev->pdev->dev,
2100 p_buffer->rx_buffer_size,
2101 p_buffer->rx_buffer_virt_addr,
2102 p_buffer->rx_buffer_phys_addr);
2103 kfree(p_buffer);
2104 }
2105}
2106
2107void qed_ll2_release_connection(void *cxt, u8 connection_handle)
2108{
2109 struct qed_hwfn *p_hwfn = cxt;
2110 struct qed_ll2_info *p_ll2_conn = NULL;
2111
2112 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
2113 if (!p_ll2_conn)
2114 return;
2115
2116 kfree(p_ll2_conn->tx_queue.descq_mem);
2117 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain);
2118
2119 kfree(p_ll2_conn->rx_queue.descq_array);
2120 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain);
2121 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain);
2122
2123 qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid);
2124
2125 qed_ll2_release_connection_ooo(p_hwfn, p_ll2_conn);
2126
2127 mutex_lock(&p_ll2_conn->mutex);
2128 p_ll2_conn->b_active = false;
2129 mutex_unlock(&p_ll2_conn->mutex);
2130}
2131
2132int qed_ll2_alloc(struct qed_hwfn *p_hwfn)
2133{
2134 struct qed_ll2_info *p_ll2_connections;
2135 u8 i;
2136
2137
2138 p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS,
2139 sizeof(struct qed_ll2_info), GFP_KERNEL);
2140 if (!p_ll2_connections) {
2141 DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n");
2142 return -ENOMEM;
2143 }
2144
2145 for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2146 p_ll2_connections[i].my_id = i;
2147
2148 p_hwfn->p_ll2_info = p_ll2_connections;
2149 return 0;
2150}
2151
2152void qed_ll2_setup(struct qed_hwfn *p_hwfn)
2153{
2154 int i;
2155
2156 for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
2157 mutex_init(&p_hwfn->p_ll2_info[i].mutex);
2158}
2159
2160void qed_ll2_free(struct qed_hwfn *p_hwfn)
2161{
2162 if (!p_hwfn->p_ll2_info)
2163 return;
2164
2165 kfree(p_hwfn->p_ll2_info);
2166 p_hwfn->p_ll2_info = NULL;
2167}
2168
2169static void _qed_ll2_get_port_stats(struct qed_hwfn *p_hwfn,
2170 struct qed_ptt *p_ptt,
2171 struct qed_ll2_stats *p_stats)
2172{
2173 struct core_ll2_port_stats port_stats;
2174
2175 memset(&port_stats, 0, sizeof(port_stats));
2176 qed_memcpy_from(p_hwfn, p_ptt, &port_stats,
2177 BAR0_MAP_REG_TSDM_RAM +
2178 TSTORM_LL2_PORT_STAT_OFFSET(MFW_PORT(p_hwfn)),
2179 sizeof(port_stats));
2180
2181 p_stats->gsi_invalid_hdr += HILO_64_REGPAIR(port_stats.gsi_invalid_hdr);
2182 p_stats->gsi_invalid_pkt_length +=
2183 HILO_64_REGPAIR(port_stats.gsi_invalid_pkt_length);
2184 p_stats->gsi_unsupported_pkt_typ +=
2185 HILO_64_REGPAIR(port_stats.gsi_unsupported_pkt_typ);
2186 p_stats->gsi_crcchksm_error +=
2187 HILO_64_REGPAIR(port_stats.gsi_crcchksm_error);
2188}
2189
2190static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn,
2191 struct qed_ptt *p_ptt,
2192 struct qed_ll2_info *p_ll2_conn,
2193 struct qed_ll2_stats *p_stats)
2194{
2195 struct core_ll2_tstorm_per_queue_stat tstats;
2196 u8 qid = p_ll2_conn->queue_id;
2197 u32 tstats_addr;
2198
2199 memset(&tstats, 0, sizeof(tstats));
2200 tstats_addr = BAR0_MAP_REG_TSDM_RAM +
2201 CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid);
2202 qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
2203
2204 p_stats->packet_too_big_discard +=
2205 HILO_64_REGPAIR(tstats.packet_too_big_discard);
2206 p_stats->no_buff_discard += HILO_64_REGPAIR(tstats.no_buff_discard);
2207}
2208
2209static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn,
2210 struct qed_ptt *p_ptt,
2211 struct qed_ll2_info *p_ll2_conn,
2212 struct qed_ll2_stats *p_stats)
2213{
2214 struct core_ll2_ustorm_per_queue_stat ustats;
2215 u8 qid = p_ll2_conn->queue_id;
2216 u32 ustats_addr;
2217
2218 memset(&ustats, 0, sizeof(ustats));
2219 ustats_addr = BAR0_MAP_REG_USDM_RAM +
2220 CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid);
2221 qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
2222
2223 p_stats->rcv_ucast_bytes += HILO_64_REGPAIR(ustats.rcv_ucast_bytes);
2224 p_stats->rcv_mcast_bytes += HILO_64_REGPAIR(ustats.rcv_mcast_bytes);
2225 p_stats->rcv_bcast_bytes += HILO_64_REGPAIR(ustats.rcv_bcast_bytes);
2226 p_stats->rcv_ucast_pkts += HILO_64_REGPAIR(ustats.rcv_ucast_pkts);
2227 p_stats->rcv_mcast_pkts += HILO_64_REGPAIR(ustats.rcv_mcast_pkts);
2228 p_stats->rcv_bcast_pkts += HILO_64_REGPAIR(ustats.rcv_bcast_pkts);
2229}
2230
2231static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn,
2232 struct qed_ptt *p_ptt,
2233 struct qed_ll2_info *p_ll2_conn,
2234 struct qed_ll2_stats *p_stats)
2235{
2236 struct core_ll2_pstorm_per_queue_stat pstats;
2237 u8 stats_id = p_ll2_conn->tx_stats_id;
2238 u32 pstats_addr;
2239
2240 memset(&pstats, 0, sizeof(pstats));
2241 pstats_addr = BAR0_MAP_REG_PSDM_RAM +
2242 CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id);
2243 qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
2244
2245 p_stats->sent_ucast_bytes += HILO_64_REGPAIR(pstats.sent_ucast_bytes);
2246 p_stats->sent_mcast_bytes += HILO_64_REGPAIR(pstats.sent_mcast_bytes);
2247 p_stats->sent_bcast_bytes += HILO_64_REGPAIR(pstats.sent_bcast_bytes);
2248 p_stats->sent_ucast_pkts += HILO_64_REGPAIR(pstats.sent_ucast_pkts);
2249 p_stats->sent_mcast_pkts += HILO_64_REGPAIR(pstats.sent_mcast_pkts);
2250 p_stats->sent_bcast_pkts += HILO_64_REGPAIR(pstats.sent_bcast_pkts);
2251}
2252
2253static int __qed_ll2_get_stats(void *cxt, u8 connection_handle,
2254 struct qed_ll2_stats *p_stats)
2255{
2256 struct qed_hwfn *p_hwfn = cxt;
2257 struct qed_ll2_info *p_ll2_conn = NULL;
2258 struct qed_ptt *p_ptt;
2259
2260 if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) ||
2261 !p_hwfn->p_ll2_info)
2262 return -EINVAL;
2263
2264 p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
2265
2266 p_ptt = qed_ptt_acquire(p_hwfn);
2267 if (!p_ptt) {
2268 DP_ERR(p_hwfn, "Failed to acquire ptt\n");
2269 return -EINVAL;
2270 }
2271
2272 if (p_ll2_conn->input.gsi_enable)
2273 _qed_ll2_get_port_stats(p_hwfn, p_ptt, p_stats);
2274
2275 _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2276
2277 _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2278
2279 if (p_ll2_conn->tx_stats_en)
2280 _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
2281
2282 qed_ptt_release(p_hwfn, p_ptt);
2283
2284 return 0;
2285}
2286
2287int qed_ll2_get_stats(void *cxt,
2288 u8 connection_handle, struct qed_ll2_stats *p_stats)
2289{
2290 memset(p_stats, 0, sizeof(*p_stats));
2291 return __qed_ll2_get_stats(cxt, connection_handle, p_stats);
2292}
2293
2294static void qed_ll2b_release_rx_packet(void *cxt,
2295 u8 connection_handle,
2296 void *cookie,
2297 dma_addr_t rx_buf_addr,
2298 bool b_last_packet)
2299{
2300 struct qed_hwfn *p_hwfn = cxt;
2301
2302 qed_ll2_dealloc_buffer(p_hwfn->cdev, cookie);
2303}
2304
2305static void qed_ll2_register_cb_ops(struct qed_dev *cdev,
2306 const struct qed_ll2_cb_ops *ops,
2307 void *cookie)
2308{
2309 cdev->ll2->cbs = ops;
2310 cdev->ll2->cb_cookie = cookie;
2311}
2312
2313static struct qed_ll2_cbs ll2_cbs = {
2314 .rx_comp_cb = &qed_ll2b_complete_rx_packet,
2315 .rx_release_cb = &qed_ll2b_release_rx_packet,
2316 .tx_comp_cb = &qed_ll2b_complete_tx_packet,
2317 .tx_release_cb = &qed_ll2b_complete_tx_packet,
2318};
2319
2320static void qed_ll2_set_conn_data(struct qed_hwfn *p_hwfn,
2321 struct qed_ll2_acquire_data *data,
2322 struct qed_ll2_params *params,
2323 enum qed_ll2_conn_type conn_type,
2324 u8 *handle, bool lb)
2325{
2326 memset(data, 0, sizeof(*data));
2327
2328 data->input.conn_type = conn_type;
2329 data->input.mtu = params->mtu;
2330 data->input.rx_num_desc = QED_LL2_RX_SIZE;
2331 data->input.rx_drop_ttl0_flg = params->drop_ttl0_packets;
2332 data->input.rx_vlan_removal_en = params->rx_vlan_stripping;
2333 data->input.tx_num_desc = QED_LL2_TX_SIZE;
2334 data->p_connection_handle = handle;
2335 data->cbs = &ll2_cbs;
2336 ll2_cbs.cookie = p_hwfn;
2337
2338 if (lb) {
2339 data->input.tx_tc = PKT_LB_TC;
2340 data->input.tx_dest = QED_LL2_TX_DEST_LB;
2341 } else {
2342 data->input.tx_tc = 0;
2343 data->input.tx_dest = QED_LL2_TX_DEST_NW;
2344 }
2345}
2346
2347static int qed_ll2_start_ooo(struct qed_hwfn *p_hwfn,
2348 struct qed_ll2_params *params)
2349{
2350 u8 *handle = &p_hwfn->pf_params.iscsi_pf_params.ll2_ooo_queue_id;
2351 struct qed_ll2_acquire_data data;
2352 int rc;
2353
2354 qed_ll2_set_conn_data(p_hwfn, &data, params,
2355 QED_LL2_TYPE_OOO, handle, true);
2356
2357 rc = qed_ll2_acquire_connection(p_hwfn, &data);
2358 if (rc) {
2359 DP_INFO(p_hwfn, "Failed to acquire LL2 OOO connection\n");
2360 goto out;
2361 }
2362
2363 rc = qed_ll2_establish_connection(p_hwfn, *handle);
2364 if (rc) {
2365 DP_INFO(p_hwfn, "Failed to establish LL2 OOO connection\n");
2366 goto fail;
2367 }
2368
2369 return 0;
2370
2371fail:
2372 qed_ll2_release_connection(p_hwfn, *handle);
2373out:
2374 *handle = QED_LL2_UNUSED_HANDLE;
2375 return rc;
2376}
2377
2378static bool qed_ll2_is_storage_eng1(struct qed_dev *cdev)
2379{
2380 return (QED_IS_FCOE_PERSONALITY(QED_LEADING_HWFN(cdev)) ||
2381 QED_IS_ISCSI_PERSONALITY(QED_LEADING_HWFN(cdev))) &&
2382 (QED_AFFIN_HWFN(cdev) != QED_LEADING_HWFN(cdev));
2383}
2384
2385static int __qed_ll2_stop(struct qed_hwfn *p_hwfn)
2386{
2387 struct qed_dev *cdev = p_hwfn->cdev;
2388 int rc;
2389
2390 rc = qed_ll2_terminate_connection(p_hwfn, cdev->ll2->handle);
2391 if (rc)
2392 DP_INFO(cdev, "Failed to terminate LL2 connection\n");
2393
2394 qed_ll2_release_connection(p_hwfn, cdev->ll2->handle);
2395
2396 return rc;
2397}
2398
2399static int qed_ll2_stop(struct qed_dev *cdev)
2400{
2401 bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev);
2402 struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2403 int rc = 0, rc2 = 0;
2404
2405 if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE)
2406 return 0;
2407
2408 qed_llh_remove_mac_filter(cdev, 0, cdev->ll2_mac_address);
2409 eth_zero_addr(cdev->ll2_mac_address);
2410
2411 if (QED_IS_ISCSI_PERSONALITY(p_hwfn))
2412 qed_ll2_stop_ooo(p_hwfn);
2413
2414
2415 if (b_is_storage_eng1) {
2416 rc2 = __qed_ll2_stop(QED_LEADING_HWFN(cdev));
2417 if (rc2)
2418 DP_NOTICE(QED_LEADING_HWFN(cdev),
2419 "Failed to stop LL2 on engine 0\n");
2420 }
2421
2422 rc = __qed_ll2_stop(p_hwfn);
2423 if (rc)
2424 DP_NOTICE(p_hwfn, "Failed to stop LL2\n");
2425
2426 qed_ll2_kill_buffers(cdev);
2427
2428 cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2429
2430 return rc | rc2;
2431}
2432
2433static int __qed_ll2_start(struct qed_hwfn *p_hwfn,
2434 struct qed_ll2_params *params)
2435{
2436 struct qed_ll2_buffer *buffer, *tmp_buffer;
2437 struct qed_dev *cdev = p_hwfn->cdev;
2438 enum qed_ll2_conn_type conn_type;
2439 struct qed_ll2_acquire_data data;
2440 int rc, rx_cnt;
2441
2442 switch (p_hwfn->hw_info.personality) {
2443 case QED_PCI_FCOE:
2444 conn_type = QED_LL2_TYPE_FCOE;
2445 break;
2446 case QED_PCI_ISCSI:
2447 conn_type = QED_LL2_TYPE_ISCSI;
2448 break;
2449 case QED_PCI_ETH_ROCE:
2450 conn_type = QED_LL2_TYPE_ROCE;
2451 break;
2452 default:
2453
2454 conn_type = QED_LL2_TYPE_TEST;
2455 }
2456
2457 qed_ll2_set_conn_data(p_hwfn, &data, params, conn_type,
2458 &cdev->ll2->handle, false);
2459
2460 rc = qed_ll2_acquire_connection(p_hwfn, &data);
2461 if (rc) {
2462 DP_INFO(p_hwfn, "Failed to acquire LL2 connection\n");
2463 return rc;
2464 }
2465
2466 rc = qed_ll2_establish_connection(p_hwfn, cdev->ll2->handle);
2467 if (rc) {
2468 DP_INFO(p_hwfn, "Failed to establish LL2 connection\n");
2469 goto release_conn;
2470 }
2471
2472
2473 spin_lock_bh(&cdev->ll2->lock);
2474 rx_cnt = cdev->ll2->rx_cnt;
2475 list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) {
2476 rc = qed_ll2_post_rx_buffer(p_hwfn,
2477 cdev->ll2->handle,
2478 buffer->phys_addr, 0, buffer, 1);
2479 if (rc) {
2480 DP_INFO(p_hwfn,
2481 "Failed to post an Rx buffer; Deleting it\n");
2482 dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
2483 cdev->ll2->rx_size, DMA_FROM_DEVICE);
2484 kfree(buffer->data);
2485 list_del(&buffer->list);
2486 kfree(buffer);
2487 } else {
2488 rx_cnt++;
2489 }
2490 }
2491 spin_unlock_bh(&cdev->ll2->lock);
2492
2493 if (rx_cnt == cdev->ll2->rx_cnt) {
2494 DP_NOTICE(p_hwfn, "Failed passing even a single Rx buffer\n");
2495 goto terminate_conn;
2496 }
2497 cdev->ll2->rx_cnt = rx_cnt;
2498
2499 return 0;
2500
2501terminate_conn:
2502 qed_ll2_terminate_connection(p_hwfn, cdev->ll2->handle);
2503release_conn:
2504 qed_ll2_release_connection(p_hwfn, cdev->ll2->handle);
2505 return rc;
2506}
2507
2508static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params)
2509{
2510 bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev);
2511 struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2512 struct qed_ll2_buffer *buffer;
2513 int rx_num_desc, i, rc;
2514
2515 if (!is_valid_ether_addr(params->ll2_mac_address)) {
2516 DP_NOTICE(cdev, "Invalid Ethernet address\n");
2517 return -EINVAL;
2518 }
2519
2520 WARN_ON(!cdev->ll2->cbs);
2521
2522
2523 INIT_LIST_HEAD(&cdev->ll2->list);
2524 spin_lock_init(&cdev->ll2->lock);
2525
2526 cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN +
2527 L1_CACHE_BYTES + params->mtu;
2528
2529
2530
2531
2532
2533 rx_num_desc = QED_LL2_RX_SIZE * (b_is_storage_eng1 ? 2 : 1);
2534 DP_INFO(cdev, "Allocating %d LL2 buffers of size %08x bytes\n",
2535 rx_num_desc, cdev->ll2->rx_size);
2536 for (i = 0; i < rx_num_desc; i++) {
2537 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
2538 if (!buffer) {
2539 DP_INFO(cdev, "Failed to allocate LL2 buffers\n");
2540 rc = -ENOMEM;
2541 goto err0;
2542 }
2543
2544 rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data,
2545 &buffer->phys_addr);
2546 if (rc) {
2547 kfree(buffer);
2548 goto err0;
2549 }
2550
2551 list_add_tail(&buffer->list, &cdev->ll2->list);
2552 }
2553
2554 rc = __qed_ll2_start(p_hwfn, params);
2555 if (rc) {
2556 DP_NOTICE(cdev, "Failed to start LL2\n");
2557 goto err0;
2558 }
2559
2560
2561
2562
2563 if (b_is_storage_eng1) {
2564 rc = __qed_ll2_start(QED_LEADING_HWFN(cdev), params);
2565 if (rc) {
2566 DP_NOTICE(QED_LEADING_HWFN(cdev),
2567 "Failed to start LL2 on engine 0\n");
2568 goto err1;
2569 }
2570 }
2571
2572 if (QED_IS_ISCSI_PERSONALITY(p_hwfn)) {
2573 DP_VERBOSE(cdev, QED_MSG_STORAGE, "Starting OOO LL2 queue\n");
2574 rc = qed_ll2_start_ooo(p_hwfn, params);
2575 if (rc) {
2576 DP_NOTICE(cdev, "Failed to start OOO LL2\n");
2577 goto err2;
2578 }
2579 }
2580
2581 rc = qed_llh_add_mac_filter(cdev, 0, params->ll2_mac_address);
2582 if (rc) {
2583 DP_NOTICE(cdev, "Failed to add an LLH filter\n");
2584 goto err3;
2585 }
2586
2587 ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address);
2588
2589 return 0;
2590
2591err3:
2592 if (QED_IS_ISCSI_PERSONALITY(p_hwfn))
2593 qed_ll2_stop_ooo(p_hwfn);
2594err2:
2595 if (b_is_storage_eng1)
2596 __qed_ll2_stop(QED_LEADING_HWFN(cdev));
2597err1:
2598 __qed_ll2_stop(p_hwfn);
2599err0:
2600 qed_ll2_kill_buffers(cdev);
2601 cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
2602 return rc;
2603}
2604
2605static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb,
2606 unsigned long xmit_flags)
2607{
2608 struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2609 struct qed_ll2_tx_pkt_info pkt;
2610 const skb_frag_t *frag;
2611 u8 flags = 0, nr_frags;
2612 int rc = -EINVAL, i;
2613 dma_addr_t mapping;
2614 u16 vlan = 0;
2615
2616 if (unlikely(skb->ip_summed != CHECKSUM_NONE)) {
2617 DP_INFO(cdev, "Cannot transmit a checksummed packet\n");
2618 return -EINVAL;
2619 }
2620
2621
2622
2623
2624 nr_frags = skb_shinfo(skb)->nr_frags;
2625
2626 if (1 + nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET) {
2627 DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n",
2628 1 + nr_frags);
2629 return -EINVAL;
2630 }
2631
2632 mapping = dma_map_single(&cdev->pdev->dev, skb->data,
2633 skb->len, DMA_TO_DEVICE);
2634 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2635 DP_NOTICE(cdev, "SKB mapping failed\n");
2636 return -EINVAL;
2637 }
2638
2639
2640 if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) &&
2641 ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
2642 flags |= BIT(CORE_TX_BD_DATA_IP_CSUM_SHIFT);
2643
2644 if (skb_vlan_tag_present(skb)) {
2645 vlan = skb_vlan_tag_get(skb);
2646 flags |= BIT(CORE_TX_BD_DATA_VLAN_INSERTION_SHIFT);
2647 }
2648
2649 memset(&pkt, 0, sizeof(pkt));
2650 pkt.num_of_bds = 1 + nr_frags;
2651 pkt.vlan = vlan;
2652 pkt.bd_flags = flags;
2653 pkt.tx_dest = QED_LL2_TX_DEST_NW;
2654 pkt.first_frag = mapping;
2655 pkt.first_frag_len = skb->len;
2656 pkt.cookie = skb;
2657 if (test_bit(QED_MF_UFP_SPECIFIC, &cdev->mf_bits) &&
2658 test_bit(QED_LL2_XMIT_FLAGS_FIP_DISCOVERY, &xmit_flags))
2659 pkt.remove_stag = true;
2660
2661
2662
2663
2664
2665
2666 rc = qed_ll2_prepare_tx_packet(p_hwfn, cdev->ll2->handle,
2667 &pkt, 1);
2668 if (rc)
2669 goto err;
2670
2671 for (i = 0; i < nr_frags; i++) {
2672 frag = &skb_shinfo(skb)->frags[i];
2673
2674 mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0,
2675 skb_frag_size(frag), DMA_TO_DEVICE);
2676
2677 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
2678 DP_NOTICE(cdev,
2679 "Unable to map frag - dropping packet\n");
2680 rc = -ENOMEM;
2681 goto err;
2682 }
2683
2684 rc = qed_ll2_set_fragment_of_tx_packet(p_hwfn,
2685 cdev->ll2->handle,
2686 mapping,
2687 skb_frag_size(frag));
2688
2689
2690
2691
2692 if (rc)
2693 goto err2;
2694 }
2695
2696 return 0;
2697
2698err:
2699 dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE);
2700err2:
2701 return rc;
2702}
2703
2704static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats)
2705{
2706 bool b_is_storage_eng1 = qed_ll2_is_storage_eng1(cdev);
2707 struct qed_hwfn *p_hwfn = QED_AFFIN_HWFN(cdev);
2708 int rc;
2709
2710 if (!cdev->ll2)
2711 return -EINVAL;
2712
2713 rc = qed_ll2_get_stats(p_hwfn, cdev->ll2->handle, stats);
2714 if (rc) {
2715 DP_NOTICE(p_hwfn, "Failed to get LL2 stats\n");
2716 return rc;
2717 }
2718
2719
2720 if (b_is_storage_eng1) {
2721 rc = __qed_ll2_get_stats(QED_LEADING_HWFN(cdev),
2722 cdev->ll2->handle, stats);
2723 if (rc) {
2724 DP_NOTICE(QED_LEADING_HWFN(cdev),
2725 "Failed to get LL2 stats on engine 0\n");
2726 return rc;
2727 }
2728 }
2729
2730 return 0;
2731}
2732
2733const struct qed_ll2_ops qed_ll2_ops_pass = {
2734 .start = &qed_ll2_start,
2735 .stop = &qed_ll2_stop,
2736 .start_xmit = &qed_ll2_start_xmit,
2737 .register_cb_ops = &qed_ll2_register_cb_ops,
2738 .get_stats = &qed_ll2_stats,
2739};
2740
2741int qed_ll2_alloc_if(struct qed_dev *cdev)
2742{
2743 cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL);
2744 return cdev->ll2 ? 0 : -ENOMEM;
2745}
2746
2747void qed_ll2_dealloc_if(struct qed_dev *cdev)
2748{
2749 kfree(cdev->ll2);
2750 cdev->ll2 = NULL;
2751}
2752