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